U.S. patent application number 17/388916 was filed with the patent office on 2022-02-03 for yarn of staple fibers from multi-filaments by stretching and controlled breaking and articles made therefrom.
The applicant listed for this patent is Chun-Jung KUO. Invention is credited to Chun-Jung KUO.
Application Number | 20220034002 17/388916 |
Document ID | / |
Family ID | |
Filed Date | 2022-02-03 |
United States Patent
Application |
20220034002 |
Kind Code |
A1 |
KUO; Chun-Jung |
February 3, 2022 |
YARN OF STAPLE FIBERS FROM MULTI-FILAMENTS BY STRETCHING AND
CONTROLLED BREAKING AND ARTICLES MADE THEREFROM
Abstract
A single-strand yarn includes a plurality of intimately
associated staple fibers made from N strands of multi-filaments by
stretching and controlled breaking, and then spun by a spinning
process, where N is a natural number. Within the single-strand yarn
of a sampling length according to the invention, a ratio of the
number of the staple fibers, whose length is equal to or greater
than 60% of a setup fiber length to the total number of the staple
fibers, is equal to or greater than 60%. The sampling length is
equal to or less than 10 meters. The setup fiber length is equal to
or larger than 65 mm. The dispersion of the weight distribution in
the average length of the single-strand yarn according to the
invention is equal to or less than 60%.
Inventors: |
KUO; Chun-Jung; (Taipei
City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KUO; Chun-Jung |
Taipei City |
|
TW |
|
|
Appl. No.: |
17/388916 |
Filed: |
July 29, 2021 |
International
Class: |
D02G 3/38 20060101
D02G003/38; D03D 15/292 20060101 D03D015/292 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 30, 2020 |
TW |
109125696 |
Claims
1. A single-strand yarn, comprising: a plurality of intimately
associated staple fibers, being made from N strands of first
multi-filaments by stretching and controlled breaking, and then
being spun by a spinning process, N being a natural number, wherein
within said single-strand yarn of a sampling length, a ratio of the
number of the staple fibers, whose length is equal to or greater
than 60% of a setup fiber length, to the total number of the staple
fibers is equal to or greater than 60%, the sampling length is
equal to or less than 10 meters, the setup fiber length is equal to
or larger than 65 mm, a dispersion of a weight distribution in an
average length of said single-strand yarn is equal to or less than
60%, wherein the N strands of first multi-filaments are made of at
least one selected from the group consisting of copper, CuNi
alloys, CuNiSi alloys, CuNiZn alloys, CuNiSn alloys, CuCr alloys,
CuAg alloys, CuW alloys, FeCrAl alloys, silver, gold, lead, zinc,
aluminum, nickel, brass, phosphor bronze, beryllium copper,
nichrome, tantalum, tungsten, platinum, palladium, stainless
steels, 316L stainless steel, titanium, titanium alloys,
Ni--Cr--Mo--W alloy, zirconium, zirconium alloys, HASTELLOY.RTM.
alloys, Nickel alloys, MONEL.RTM. alloys, ICONEL.RTM. alloys,
FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys, CARPENTER.RTM. alloy,
polyester, polyamide, aramid polyamide, polyacrylic, polyethylene,
ultra-high molecular weight polyethylene, polypropylene, cellulose,
protein, elastomeric, polytetrafluoroethylene, polybenzoxazol
(PBO), polyvinylcarbazole, polyetherketone, carbon, bamboo
charcoal, and glass.
2. The single-strand yarn of claim 1, wherein a single-strand of
second multi-filaments is formed of the at least one material
forming the N strands of first multi-filaments, a first fineness of
said single-strand yarn is identical to a second fineness of the
single-strand of second multi-filaments, said single-strand yarn
has a first strength, the single-strand of second multi-filaments
has a second strength, and the first strength is equal to or
greater than 70% of the second strength.
3. A plied yarn, comprising: M single-strand yarns, being doubled
or twisted together, M being an integer equal to or larger than 2,
each single-strand yarn comprising: a plurality of intimately
associated staple fibers, being made from N strands of first
multi-filaments by stretching and controlled breaking, and then
being spun by a spinning process, N being a natural number, wherein
within said one single-strand yarn of a sampling length, a ratio of
the number of the staple fibers, whose length is equal to or
greater than 60% of a setup fiber length, to the total number of
the staple fibers is equal to or greater than 60%, the sampling
length is equal to or less than 10 meters, the setup fiber length
is equal to or larger than 65 mm, a dispersion of a weight
distribution in an average length of said one single-strand yarn is
equal to or less than 60%, wherein the N strands of first
multi-filaments are made of at least one selected from the group
consisting of copper, CuNi alloys, CuNiSi alloys, CuNiZn alloys,
CuNiSn alloys, CuCr alloys, CuAg alloys, CuW alloys, FeCrAl alloys,
silver, gold, lead, zinc, aluminum, nickel, brass, phosphor bronze,
beryllium copper, nichrome, tantalum, tungsten, platinum,
palladium, stainless steels, 316L stainless steel, titanium,
titanium alloys, Ni--Cr--Mo--W alloy, zirconium, zirconium alloys,
HASTELLOY.RTM. alloys, Nickel alloys, MONEL.RTM. alloys,
ICONEL.RTM. alloys, FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys,
CARPENTER.RTM. alloy, polyester, polyamide, aramid polyamide,
polyacrylic, polyethylene, ultra-high molecular weight
polyethylene, polypropylene, cellulose, protein, elastomeric,
polytetrafluoroethylene, polybenzoxazol (PBO), polyvinylcarbazole,
polyetherketone, carbon, bamboo charcoal, and glass.
4. The plied yarn of claim 3, wherein a single-strand of second
multi-filaments is formed of the at least one material forming the
N strands of first multi-filaments, a first fineness of said
single-strand yarn is identical to a second fineness of the
single-strand of second multi-filaments, said single-strand yarn
has a first strength, the single-strand of second multi-filaments
has a second strength, and the first strength is equal to or
greater than 70% of the second strength.
5. A textile article woven from a first single-strand yarn or a
plied yarn by one selected from the group consisting of a weaving
process, a non-weaving process, a knitting process, a warp knitting
process, and a weft knitting process, the plied yarn comprising M
second single-strand yarns which are doubled or twisted together, M
being an integer equal to or larger than 2, the first single-strand
yarn and each second single-strand yarn both comprising: a
plurality of intimately associated staple fibers, being made from N
strands of first multi-filaments by stretching and controlled
breaking, and then being spun by a spinning process, N being a
natural number, wherein within said one single-strand yarn of a
sampling length, a ratio of the number of the staple fibers, whose
length is equal to or greater than 60% of a setup fiber length, to
the total number of the staple fibers is equal to or greater than
60%, the sampling length is equal to or less than 10 meters, the
setup fiber length is equal to or larger than 65 mm, a dispersion
of a weight distribution in an average length of said one
single-strand yarn is equal to or less than 60%, wherein the N
strands of first multi-filaments are made of at least one selected
from the group consisting of copper, CuNi alloys, CuNiSi alloys,
CuNiZn alloys, CuNiSn alloys, CuCr alloys, CuAg alloys, CuW alloys,
FeCrAl alloys, silver, gold, lead, zinc, aluminum, nickel, brass,
phosphor bronze, beryllium copper, nichrome, tantalum, tungsten,
platinum, palladium, stainless steels, 316L stainless steel,
titanium, titanium alloys, Ni--Cr--Mo--W alloy, zirconium,
zirconium alloys, HASTELLOY.RTM. alloys, Nickel alloys, MONEL.RTM.
alloys, ICONEL.RTM. alloys, FERRALIUM.RTM. alloy, NITRONIC.RTM.
alloys, CARPENTER.RTM. alloy, polyester, polyamide, aramid
polyamide, polyacrylic, polyethylene, ultra-high molecular weight
polyethylene, polypropylene, cellulose, protein, elastomeric,
polytetrafluoroethylene, polybenzoxazol (PBO), polyvinylcarbazole,
polyetherketone, carbon, bamboo charcoal, and glass.
6. The textile article of claim 5, wherein a single-strand of
second multi-filaments is formed of the at least one material
forming the N strands of first multi-filaments, a first fineness of
the first single-strand yarn or each second single-strand yarn is
identical to a second fineness of the single-strand of second
multi-filaments, the first single-strand yarn and each second
single-strand yarn both have a first strength, the single-strand of
second multi-filaments has a second strength, and the first
strength is equal to or greater than 70% of the second
strength.
7. The textile article of claim 6, wherein a number of neps on a
surface of the textile article is equal to or less than
30/m.sup.2.
8. The textile article of claim 7, wherein the N strands of first
multi-filaments are made of 316L stainless steel, the textile
article is woven by the knitting process.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This utility application claims priority to Taiwan
Application Serial Number 109125696, filed Jul. 30, 2020, which is
incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0002] The invention relates to a single-strand yarn and a plied
yarn made from at least one strand of multi-filaments by stretching
and controlled breaking, and a textile article made therefrom, and
more in particular, to a single-strand yarn or a plied yarn having
high strength and high diameter uniformity and being made from a
plurality of intimately associated staple fibers made from
multi-filaments by stretching and controlled breaking, and a
textile article made therefrom.
2. Description of the Prior Art
[0003] Continuous filaments made of various materials will be
further broken into staple fibers and spun into yarns due to
application and cost considerations. These yarns spun from
discontinuous staple fibers necessarily have poorer properties than
continuous multi-filaments of the same diameter and the same
material, including strength and diameter uniformity because of
discontinuous staple fiber distribution. Stretch-break spinning way
is to improve the spinning technology to obtain the properties of
yarns of staple fibers closer to those of multi-filaments of the
same fineness and the same material, especially more important for
high-performance fibers, such as carbon fibers, metal fibers,
aromatic polyamide fibers, ultra-high molecular weight polyethylene
(UHMWPE) fibers, polybenzoxazol (PBO) fibers, polyvinylcarbazole
fibers, glass fibers, etc.
[0004] Taking Kevlar.RTM. fiber (aromatic polyamide synthetic
fiber) manufactured by DuPont Corp. as an example, a 350D (denier)
single-strand of Kevlar.RTM. multi-filaments has the strength of up
to 10 kg. However, a 350D single-strand of Kevlar.RTM.
multi-filaments is very expensive. In commercial applications, such
expensive yarn is rarely used to make textiles. Instead, the
traditional twisted yarn made from a plurality of Kevlar.RTM. spun
yarn is used to make textiles. The twisted yarn of Kevlar.RTM.
staple fibers with a fineness equivalent to the fineness of a 350D
single-strand of Kevlar.RTM. multi-filaments is a double-strand
yarn of 30Ne, but its strength is only 3.6.about.4 kg.
[0005] In order to improve the strength and diameter uniformity of
the yarn formed by twisting multiple staple fibers, one prior art
breaks multi-filaments into staple fibers by the stretch-breaking
way, and then twist staple fibers into yarns. The stretch-breaking
way is to feed multi-filaments into the stretch-breaking machine to
obtain the stretch-broken fibers. The prior art breaking machine is
composed of multiple sets of rollers that paired combinations are a
serial up and down roller pairs, or combinations are arranged
triangularly with one roller up and two rollers down or two rollers
up and one roller down, or a mixed arrangement with roller pairs
and triangle combinations. The distance between the multiple sets
of rollers in the stretch-breaking machine is set as the length of
the broken fiber. The multi-filaments are broken by the speed
difference of the multiple sets of rollers to obtain a broken
sliver with a fiber length distribution. The broken sliver obtains
a length weight distribution per unit sampling length. The broken
sliver is then fed into the spinning machine, and can be spun
directly into a single-strand yarn.
[0006] According to the theory of spinning engineering, the
strength uniformity of a single-strand yarn mainly depends on the
fiber length distribution in the single-strand yarn. Moreover, the
diameter uniformity of a single-strand yarn mainly depends on the
weight distribution in the average length of the single-strand
yarn. Firstly, under a fixed yarn length, because the length of the
broken fibers is not uniform, the fiber length distribution in the
yarns will have a degree of dispersion. An ideal breaking length of
the broken fiber is called a setup fiber length. The setup fiber
length is equal to the distance from the grip point of the front
exit roller of the spinning machine to the grip point of the rear
roller. The dispersion of the fiber length distribution of in the
yarn refers to the ratio of the number of staple fibers, whose
length is equal to or greater than 60% of the setup fiber length,
to the total number of staple fibers. The lower the ratio, the
greater the dispersion of the fiber length distribution in the yarn
is. Larger dispersion of the fiber length distribution in the yarn
means that the fiber length uniformity in the single-strand yarn is
worse. The worse the fiber length uniformity is, the worse the
cohesive force between the fibers will be. And, the worse the
cohesion force will seriously affect the stress transmission to
result in poorer strength uniformity. On the contrary, the smaller
the dispersion of the fiber the fiber length distribution in the
yarn is, the better the strength uniformity of the yarn will be.
Secondly, under a fixed setup fiber length, the weight distribution
of the average length of the single-strand yarn will also have a
degree of dispersion. The weight of the average length of a
single-strand yarn is defined as the gram weight of the
single-strand yarn per meter. The dispersion of the weight
distribution of the average length of a single-strand yarn refers
to the deviation range of the individual measured weight of the
average length from the average weight of the average length under
multiple sampling times. The greater the dispersion of the weight
distribution of the average length of a single-strand yarn, the
greater the difference in fiber quantity distribution per unit
volume of the single-strand yarn is. It is mainly because there are
too many free fibers. Free fibers will migrate freely during the
spinning process. This free migration of the free fibers is
uncontrollable, so it will result in uneven yarn, neps or knots
during the spinning process. The formation of uneven yarn, neps and
knots seriously affects the diameter uniformity of the yarn. On the
contrary, the smaller the dispersion of the weight distribution of
the average length of a single-strand yarn, the better the diameter
uniformity of the single-strand yarn is.
[0007] Therefore, the traditional spinning process is actually to
control the dispersion of the fiber length distribution and the
dispersion of the weight distribution of the average length of the
yarn. Therefore, the traditional spinning technology needs to go
through the procedures of opening and picking process, carding
process, drawing process, roving process, and spinning process to
reduce the above-mentioned two dispersions. Differently, the
stretch-break spinning technology only needs to go through the
stretch-breaking process, the drawing process and the spinning
process. As the process is shortened, the stretch-break spinning
technology increases the above two dispersions. Therefore, the
dispersion of the fiber length distribution and the dispersion of
the weight distribution of the average length of the yarn spun by
the stretch-break way are much higher than those of the yarn spun
by the traditional spinning technology.
[0008] In addition, in traditional spinning technology, due to the
efficiency requirements of quality control sampling, the weight
distribution of the average length of the yarn and the length
distribution of the staple fibers are both too long in the sampling
length of the test. Generally, the sampling length for testing is
30.about.100 m, which has little effect on the traditional spinning
process that has achieved good control of the mentioned-above
dispersions. But, for yarns that have only undergone
stretch-breaking process, drawing process and spinning process with
high dispersions, too long sampling length will conceal the problem
of dispersions and fail to show the true strength and diameter
uniformity of the yarn, and eventually will lead to a large gap
between the statistical value and the actual application.
[0009] At present, stretch-break spinning technology is mainly used
in spinning of high-performance fibers, such as carbon fibers,
metal fibers, aromatic polyamide fibers, ultra-high molecular
weight polyethylene fibers, polybenzoxazol fibers,
polyvinylcarbazole fibers, or glass fiber. Because high-performance
fibers are costly in the production of small-diameter
multi-filaments, the relatively low-cost large-diameter
multi-filaments of such high-performance fiber can be used to be
spun into finer yarn of staple fibers of such high-performance
fiber through stretch-break spinning. At the same time,
stretch-break spinning technology makes it easier to produce yarns
of long staple fibers. Compared to the strength of continuous
multi-filaments, the longer the length of the long staple fibers,
the closer the strength of the resulting yarn will be to the
strength of continuous multi-filaments. Therefore, considering the
manufacturing cost and strength of the yarn, in textile
manufacturing, the yarn produced by the stretch-break spinning
technology has the opportunity to replace the small-diameter
multi-filaments. For example, a double-strand yarn of 50Ne, spun
from stretch-broken aromatic polyamide staple fibers, replaces a
200D single-strand of aromatic polyamide multi-filaments. However,
if the length of the stretch-broken staple fibers is too short, the
strength loss of the yarn spun from the stretch-broken staple
fibers will increase. Therefore, increasing the length of the
stretch-broken staple fibers is very important for the
stretch-break spinning process of the high-performance fibers. In
general, the longer the length of the stretch-broken staple fibers,
the less the strength loss of the yarn spun from the stretch-broken
staple fibers will be. The yarn of high-performance fibers spun by
the stretch-break spinning process can even reach more than 70% of
the strength of the single-strand yarn of high-performance
multi-filaments with the same fineness. In addition to the control
of the length of the stretch-broken staple fibers, the better the
control of the above two dispersions is needed, so that the
strength and diameter uniformity of the yarn formed by the
stretch-breaking spinning process can be closer to those of the
single-strand yarn of multi-filament with the same fineness.
[0010] Please refer to U.S. Pat. No. 482,563 for the prior art of
forming yarns with high-performance fibers using the stretch-break
spinning technology. U.S. Pat. No. 482,563 discloses the use of a
stretch-break spinning technology to make yarns of carbon fibers
and control the average length of the stretch-broken carbon fibers.
However, judging by the theory of yarn strength uniformity, the
average length of the stretch-broken fibers is not a key factor
affecting the strength of the yarn spun from the stretch-broken
fibers. The yarn formation of the stretch-broken fibers should be
controlled by the dispersion of the fiber length distribution in
the yarn. Because stretch-break spinning technology of the prior
art has poor control over the dispersion of the fiber length
distribution in the yarn, the use of a stretch-break spinning
technology, disclosed by U.S. Pat. No. 482,563 to make the yarns of
the stretch-broken carbon fibers and to control the average length
of the stretch-broken carbon fibers, cannot ensure the strength of
the yarns of carbon fibers.
[0011] In addition, with regard to textile articles made from
high-performance fibers using the stretch-break spinning technology
to form yarns and then woven, due to the problem of yarn diameter
uniformity, the smoothness of the textile articles will be
seriously affected, which will cause problems in their use. For
related prior art, please refer to the U.S. Pat. No. 6,756,330 and
U.S. patent publication no. 20130008209. Both of these patents
disclose yarns of stretch-broken metal fibers and textile articles
woven from the yarns by a knitting process. The knitted textile
article is used as high-temperature separation cloth for covering
molds and tempering or press-on rings which are utilized in the
process of forming glass plates, or for covering the means of
transport by which glass plates are moved during the forming
process. In practice, the applicant of these two patent
applications, Bekaert, uses stainless steel fibers to manufacture
the above knitted fabrics, and currently uses yarns spun from
stretch-broken stainless steel fibers to be knitted into knitted
fabrics on the consideration of the strength and cost of the
knitted fabrics. U.S. Pat. No. 6,756,330 discloses increasing
stitches per square centimeter or density of the fabric to achieve
the required smoothness of the knitted fabric. The smoother knitted
fabric is used to reduce the risks for markings occurred on the
glass plate during pressing. U.S. patent publication no.
20130008209 discloses a knitted fabric knitted with yarns spun from
stretch-broken stainless steel fibers, and the yarns include at
least three bundles or single yarns. The bundles or single yarns
have an equivalent bundle diameter, which are equal or differ
maximally 40%, to achieve the required smoothness of the knitted
fabric. The smoother knitted fabric is used to reduce the risks for
the markings occurred on the glass plate during pressing. However,
judging by the theory of yarn diameter uniformity, it is the yarn
diameter uniformity that mainly affects the smoothness of the
knitted fabric, not the stitches per square centimeter or density
of the fabric and the difference of equivalent bundle diameter
between the bundles or the single yarns.
[0012] It is conceivable that if yarns with uneven finesses are
knitted into a knitted fabric, the uneven finesses of the yarns
themselves will cause irregular undulations on the surface of the
knitted fabric. Therefore, increasing the yarn density of knitted
fabrics or reducing the difference of equivalent bundle diameter
between the bundles or the single yarns cannot change the irregular
undulations of the fabric. At present, the number of neps on the
surface of a knitted fabric made from stainless steel fiber yarns
of stretch-broken metal fibers is more than 50/m.sup.2.
SUMMARY OF THE INVENTION
[0013] Accordingly, one scope of the invention is to a
single-strand yarn and a plied yarn having high strength and high
diameter uniformity and being made from a plurality of intimately
associated staple fibers made from multi-filaments by stretching
and controlled breaking, and a textile article made therefrom. The
textile article produced from the yarns made from the
stretch-broken staple fibers according to the invention has better
smoothness.
[0014] A single-strand yarn according to a first preferred
embodiment of the invention includes a plurality of intimately
associated staple fibers. The plurality of intimately associated
staple fibers are made from N strands of first multi-filaments by
stretching and controlled breaking, and then are spun by a spinning
process, where N is a natural number. Within the single-strand yarn
of a sampling length, a ratio of the number of the staple fibers,
whose length is equal to or greater than 60% of a setup fiber
length, to the total number of the staple fibers is equal to or
greater than 60%. The sampling length is equal to or less than 10
meters. The setup fiber length is equal to or larger than 65 mm. A
dispersion of a weight distribution in an average length of said
single-strand yarn is equal to or less than 60%. The N strands of
first multi-filaments can be made of at least one selected from the
group consisting of copper, CuNi alloys, CuNiSi alloys, CuNiZn
alloys, CuNiSn alloys, CuCr alloys, CuAg alloys, CuW alloys, FeCrAl
alloys, silver, gold, lead, zinc, aluminum, nickel, brass, phosphor
bronze, beryllium copper, nichrome, tantalum, tungsten, platinum,
palladium, stainless steels, 316L stainless steel, titanium,
titanium alloys, Ni--Cr--Mo--W alloy, zirconium, zirconium alloys,
HASTELLOY.RTM. alloys, Nickel alloys, MONEL.RTM. alloys,
ICONEL.RTM. alloys, FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys,
CARPENTER.RTM. alloy, polyester, polyamide, aramid polyamide,
polyacrylic, polyethylene, ultra-high molecular weight
polyethylene, polypropylene, cellulose, protein, elastomeric,
polytetrafluoroethylene, polybenzoxazol (PBO), polyvinylcarbazole,
polyetherketone, carbon, bamboo charcoal, glass, or other
conductive or non-conductive materials.
[0015] In one embodiment, a single-strand of second multi-filaments
is formed of the at least one material forming the N strands of
first multi-filaments. A first fineness of the single-strand yarn
is identical to a second fineness of the single-strand of second
multi-filaments. The single-strand yarn has a first strength, the
single-strand of second multi-filaments has a second strength, and
the first strength is equal to or greater than 70% of the second
strength.
[0016] A plied yarn according to a second preferred embodiment of
the invention includes M single-strand yarns, where M is an integer
equal to or larger than 2. The M single-strand yarns are doubled or
twisted together. Each single-strand yarn a plurality includes a
plurality of intimately associated staple fibers. The plurality of
intimately associated staple fibers are made from N strands of
first multi-filaments by stretching and controlled breaking, and
then are spun by a spinning process, where N is a natural number.
Within said one single-strand yarn of a sampling length, a ratio of
the number of the staple fibers, whose length is equal to or
greater than 60% of a setup fiber length, to the total number of
the staple fibers is equal to or greater than 60%. The sampling
length is equal to or less than 10 meters. The setup fiber length
is equal to or larger than 65 mm. A dispersion of a weight
distribution in an average length of said one single-strand yarn is
equal to or less than 60%. The N strands of first multi-filaments
can be made of at least one selected from the group consisting of
copper, CuNi alloys, CuNiSi alloys, CuNiZn alloys, CuNiSn alloys,
CuCr alloys, CuAg alloys, CuW alloys, FeCrAl alloys, silver, gold,
lead, zinc, aluminum, nickel, brass, phosphor bronze, beryllium
copper, nichrome, tantalum, tungsten, platinum, palladium,
stainless steels, 316L stainless steel, titanium, titanium alloys,
Ni--Cr--Mo--W alloy, zirconium, zirconium alloys, HASTELLOY.RTM.
alloys, Nickel alloys, MONEL.RTM. alloys, ICONEL.RTM. alloys,
FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys, CARPENTER.RTM. alloy,
polyester, polyamide, aramid polyamide, polyacrylic, polyethylene,
ultra-high molecular weight polyethylene, polypropylene, cellulose,
protein, elastomeric, polytetrafluoroethylene, polybenzoxazol
(PBO), polyvinylcarbazole, polyetherketone, carbon, bamboo
charcoal, glass, or other conductive or non-conductive
materials.
[0017] A textile article according to a third preferred embodiment
of the invention is woven from a first single-strand yarn or a
plied yarn by a textile process. The textile process can be a
weaving process, a non-weaving process, a knitting process, a warp
knitting process, a weft knitting process, or other textile
processes. The plied yarn includes M second single-strand yarns
which are doubled or twisted together, where M is an integer equal
to or larger than 2. The first single-strand yarn and each second
single-strand yarn a plurality both include a plurality of
intimately associated staple fibers. The plurality of intimately
associated staple fibers are made from N strands of first
multi-filaments by stretching and controlled breaking, and then
being spun by a spinning process, where N is a natural number.
Within said one single-strand yarn of a sampling length, a ratio of
the number of the staple fibers, whose length is equal to or
greater than 60% of a setup fiber length, to the total number of
the staple fibers is equal to or greater than 60%. The sampling
length is equal to or less than 10 meters. The setup fiber length
is equal to or larger than 65 mm. A dispersion of a weight
distribution in an average length of said one single-strand yarn is
equal to or less than 60%. The N strands of first multi-filaments
can be made of copper, CuNi alloys, CuNiSi alloys, CuNiZn alloys,
CuNiSn alloys, CuCr alloys, CuAg alloys, CuW alloys, FeCrAl alloys,
silver, gold, lead, zinc, aluminum, nickel, brass, phosphor bronze,
beryllium copper, nichrome, tantalum, tungsten, platinum,
palladium, stainless steels, 316L stainless steel, titanium,
titanium alloys, Ni--Cr--Mo--W alloy, zirconium, zirconium alloys,
HASTELLOY.RTM. alloys, Nickel alloys, MONEL.RTM. alloys,
ICONEL.RTM. alloys, FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys,
CARPENTER.RTM. alloy, polyester, polyamide, aramid polyamide,
polyacrylic, polyethylene, ultra-high molecular weight
polyethylene, polypropylene, cellulose, protein, elastomeric,
polytetrafluoroethylene, polybenzoxazol (PBO), polyvinylcarbazole,
polyetherketone, carbon, bamboo charcoal, glass, or other
conductive or non-conductive materials.
[0018] In one embodiment, a number of neps on a surface of the
textile article according to the invention is equal to or less than
30/m.sup.2.
[0019] Compared to the prior art, within the single-strand yarn of
the sampling length or each single-strand yarn of the plied yarn,
the ratio of the number of the staple fibers, whose length is equal
to or greater than 60% of a setup fiber length, to the total number
of the staple fibers is equal to or greater than 60%, where the
sampling length is equal to or less than 10 meters and the setup
fiber length is equal to or larger than 65 mm. Moreover, the
dispersion of the weight distribution in the average length of said
one single-strand yarn is equal to or less than 60%. Therefore, the
single-strand yarn and the plied yarn according to the invention
have high strength and high diameter uniformity. Moreover, the
textile article woven from the yarns made from the stretch-broken
staple fibers according to the invention has better smoothness.
[0020] The advantage and spirit of the invention may be understood
by the following recitations.
DETAILED DESCRIPTION OF THE INVENTION
[0021] The invention uses a plurality of intimately associated
staple fibers made from multi-filaments by stretching and
controlled breaking to spin into a single-strand yarn and a plied
yarn, and a textile article is produced therefrom. In the
invention, by controlling the stretch-breaking process, the
dispersion of the length distribution of the staple fibers in the
yarn is smaller, and the dispersion of the weight distribution of
the average length of the yarn is smaller, so that the
single-strand yarn and the plied yarn according to the invention
have high strength and high diameter uniformity. The textile
article woven from the yarns made from the stretch-broken staple
fibers according to the invention has better smoothness. Some
preferred embodiments and practical applications of this present
invention would be explained in the following paragraph, describing
the characteristics, spirit, and advantages of the invention.
[0022] A single-strand yarn according to a first preferred
embodiment of the invention includes a plurality of intimately
associated staple fibers. The plurality of intimately associated
staple fibers are made from N strands of first multi-filaments by
stretching and controlled breaking, and then are spun by a spinning
process, where N is a natural number. The N strands of first
multi-filaments are fed to a stretch-breaking machine to obtain a
stretch-broken sliver, and then the stretch-broken sliver is fed
into a spinning machine to be spun into the single-stranded yarn
according to the invention.
[0023] In particular, within the single-strand yarn of a sampling
length, a ratio of the number of the staple fibers, whose length is
equal to or greater than 60% of a setup fiber length, to the total
number of the staple fibers is equal to or greater than 60%. The
sampling length is equal to or less than 10 meters. The setup fiber
length is equal to or larger than 65 mm. Moreover, a dispersion of
a weight distribution in an average length of said single-strand
yarn is equal to or less than 60%.
[0024] The N strands of first multi-filaments can be made of at
least one selected from the group consisting of copper, CuNi
alloys, CuNiSi alloys, CuNiZn alloys, CuNiSn alloys, CuCr alloys,
CuAg alloys, CuW alloys, FeCrAl alloys, silver, gold, lead, zinc,
aluminum, nickel, brass, phosphor bronze, beryllium copper,
nichrome, tantalum, tungsten, platinum, palladium, stainless
steels, 316L stainless steel, titanium, titanium alloys,
Ni--Cr--Mo--W alloy, zirconium, zirconium alloys, HASTELLOY.RTM.
alloys, Nickel alloys, MONEL.RTM. alloys, ICONEL.RTM. alloys,
FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys, CARPENTER.RTM. alloy,
polyester, polyamide, aramid polyamide, polyacrylic, polyethylene,
ultra-high molecular weight polyethylene, polypropylene, cellulose,
protein, elastomeric, polytetrafluoroethylene, polybenzoxazol
(PBO), polyvinylcarbazole, polyetherketone, carbon, bamboo
charcoal, glass, or other conductive or non-conductive materials.
Thereby, the single-strand yarn according to the invention can be
composed of single-material fibers or mixed-material fibers, and
not limited to high-performance fibers.
[0025] In one embodiment, a single-strand of second multi-filaments
is formed of the at least one material forming the N strands of
first multi-filaments. A first fineness of the single-strand yarn
is identical to a second fineness of the single-strand of second
multi-filaments. The single-strand yarn has a first strength, the
single-strand of second multi-filaments has a second strength, and
the first strength is equal to or greater than 70% of the second
strength.
[0026] A plied yarn according to a second preferred embodiment of
the invention includes M single-strand yarns, where M is an integer
equal to or larger than 2. The M single-strand yarns are doubled or
twisted together.
[0027] Each single-strand yarn a plurality includes a plurality of
intimately associated staple fibers. The plurality of intimately
associated staple fibers are made from N strands of first
multi-filaments by stretching and controlled breaking, and then are
spun by a spinning process, where N is a natural number. The N
strands of first multi-filaments are fed to a stretch-breaking
machine to obtain a stretch-broken sliver, and then the
stretch-broken sliver is fed into a spinning machine to be spun
into the single-stranded yarn.
[0028] In particular, within said one single-strand yarn of a
sampling length, a ratio of the number of the staple fibers, whose
length is equal to or greater than 60% of a setup fiber length, to
the total number of the staple fibers is equal to or greater than
60%. The sampling length is equal to or less than 10 meters. The
setup fiber length is equal to or larger than 65 mm. Moreover, a
dispersion of a weight distribution in an average length of said
one single-strand yarn is equal to or less than 60%.
[0029] The N strands of first multi-filaments can be made of at
least one selected from the group consisting of copper, CuNi
alloys, CuNiSi alloys, CuNiZn alloys, CuNiSn alloys, CuCr alloys,
CuAg alloys, CuW alloys, FeCrAl alloys, silver, gold, lead, zinc,
aluminum, nickel, brass, phosphor bronze, beryllium copper,
nichrome, tantalum, tungsten, platinum, palladium, stainless
steels, 316L stainless steel, titanium, titanium alloys,
Ni--Cr--Mo--W alloy, zirconium, zirconium alloys, HASTELLOY.RTM.
alloys, Nickel alloys, MONEL.RTM. alloys, ICONEL.RTM. alloys,
FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys, CARPENTER.RTM. alloy,
polyester, polyamide, aramid polyamide, polyacrylic, polyethylene,
ultra-high molecular weight polyethylene, polypropylene, cellulose,
protein, elastomeric, polytetrafluoroethylene, polybenzoxazol
(PBO), polyvinylcarbazole, polyetherketone, carbon, bamboo
charcoal, glass, or other conductive or non-conductive materials.
Thereby, the plied yarn according to the invention can be composed
of single-material fibers or mixed-material fibers, and not limited
to high-performance fibers.
[0030] Similarly, in one embodiment, a single-strand of second
multi-filaments is formed of the at least one material forming the
N strands of first multi-filaments. A first fineness of each
single-strand yarn is identical to a second fineness of the
single-strand of second multi-filaments. Each single-strand yarn
has a first strength, the single-strand of second multi-filaments
has a second strength, and the first strength is equal to or
greater than 70% of the second strength.
[0031] A textile article according to a third preferred embodiment
of the invention is woven from a first single-strand yarn or a
plied yarn by a textile process. The textile process can be a
weaving process, a non-weaving process, a knitting process, a warp
knitting process, a weft knitting process, or other textile
process. The plied yarn includes M second single-strand yarns which
are doubled or twisted together, where M is an integer equal to or
larger than 2.
[0032] The first single-strand yarn and each second single-strand
yarn a plurality both include a plurality of intimately associated
staple fibers. The plurality of intimately associated staple fibers
are made from N strands of first multi-filaments by stretching and
controlled breaking, and then being spun by a spinning process,
where N is a natural number. The N strands of first multi-filaments
are fed to a stretch-breaking machine to obtain a stretch-broken
sliver, and then the stretch-broken sliver is fed into a spinning
machine to be spun into the single-stranded yarn.
[0033] In particular, within said one single-strand yarn of a
sampling length, a ratio of the number of the staple fibers, whose
length is equal to or greater than 60% of a setup fiber length, to
the total number of the staple fibers is equal to or greater than
60%. The sampling length is equal to or less than 10 meters. The
setup fiber length is equal to or larger than 65 mm. Moreover, a
dispersion of a weight distribution in an average length of said
one single-strand yarn is equal to or less than 60%.
[0034] The N strands of first multi-filaments can be made of
copper, CuNi alloys, CuNiSi alloys, CuNiZn alloys, CuNiSn alloys,
CuCr alloys, CuAg alloys, CuW alloys, FeCrAl alloys, silver, gold,
lead, zinc, aluminum, nickel, brass, phosphor bronze, beryllium
copper, nichrome, tantalum, tungsten, platinum, palladium,
stainless steels, 316L stainless steel, titanium, titanium alloys,
Ni--Cr--Mo--W alloy, zirconium, zirconium alloys, HASTELLOY.RTM.
alloys, Nickel alloys, MONEL.RTM. alloys, ICONEL.RTM. alloys,
FERRALIUM.RTM. alloy, NITRONIC.RTM. alloys, CARPENTER.RTM. alloy,
polyester, polyamide, aramid polyamide, polyacrylic, polyethylene,
ultra-high molecular weight polyethylene, polypropylene, cellulose,
protein, elastomeric, polytetrafluoroethylene, polybenzoxazol
(PBO), polyvinylcarbazole, polyetherketone, carbon, bamboo
charcoal, glass, or other conductive or non-conductive materials.
Thereby, the first single-strand yarn and each second single-strand
yarn according to the invention can be composed of single-material
fibers or mixed-material fibers, and not limited to
high-performance fibers.
[0035] Similarly, in one embodiment, a single-strand of second
multi-filaments is formed of the at least one material forming the
N strands of first multi-filaments. A first fineness of the first
single-strand yarn or each second single-strand yarn is identical
to a second fineness of the single-strand of second
multi-filaments. In particular, the first single-strand yarn and
each second single-strand yarn both have a first strength, the
single-strand of second multi-filaments has a second strength, and
the first strength is equal to or greater than 70% of the second
strength.
[0036] In one embodiment, a number of neps on a surface of the
textile article according to the invention is equal to or less than
30/m.sup.2.
[0037] Compared to the prior art, within the single-strand yarn of
the sampling length or each single-strand yarn of the plied yarn,
which is equal to or less than 10 meters, the ratio of the number
of the staple fibers, whose length is equal to or greater than 60%
of a setup fiber length, to the total number of the staple fibers
is equal to or greater than 60%, where the sampling length is equal
to or less than 10 meters. Moreover, the dispersion of the weight
distribution in the average length of said one single-strand yarn
is equal to or less than 60%. Therefore, the single-strand yarn and
the plied yarn according to the invention having high strength and
high diameter uniformity. Moreover, the textile article woven from
the yarns made from the stretch-broken staple fibers according to
the invention has better smoothness.
[0038] In one embodiment, the N strands of first multi-filaments
according to the invention are formed of 316L stainless steel, and
the textile article according to the invention is woven by a
knitting process. The knitted textile article can be used as a
separation cloth for covering molds and tempering or press-on rings
which are utilized in the process of forming glass plates, or for
covering the means of transport by which glass plates are moved
during the forming process.
[0039] In an example, according to the invention, a double-strand
of Kevlar.RTM. multi-filaments of 3000D is fed into a stretching
machine to obtain a stretch-broken sliver, and then the
stretch-broken sliver is fed to a spinning machine to be spun into
a 30Ne single-yarn. The 30Ne single strand yarn is sampled at a
sampling length of 1 meter. Within the single-strand yarn of the
sampling length, the ratio of the number of staple fibers in the
single-strand yarn, whose length equal to or greater than 60% of a
setup fiber length of 65 mm, to the total number of the staple
fibers is 60.about.75%. The dispersion of the weight distribution
of the average length of the yarn is controlled within
15.about.25%. Compared to traditional yarns with a fineness
equivalent to the fineness of the 30Ne single strand yarn of the
example of the invention, a traditional 350D single-strand of
Kevlar.RTM. multi-filaments has the strength of up to 10 kg. A
traditional double-strand twisted yarn of 30Ne is made from a
plurality of Kevlar.RTM. staple fibers, but its strength is only
3.6.about.4 kg. The 30Ne single strand yarn of the example of the
invention has the strength of 7.5.about.8 kg. Obviously, the
single-strand yarn and the plied yarn spun from staple fibers made
by stretching and controlled breaking according to the invention
have high strength and high diameter uniformity.
[0040] In another example, a double-strand yarn of 6.5Ne spun from
a plurality of 316L stainless steel staple fibers made by
stretching and controlled breaking according to the invention is
woven into a knitted textile article. The knitted textile article
can be used as a separation cloth for covering molds and tempering
or press-on rings which are utilized in the process of forming
glass plates, or for covering the means of transport by which glass
plates are moved during the forming process. The 316L stainless
steel double-strand yarn of 6.5Ne according to the invention is
sampled at a sampling length of 1 meter. Within the double-strand
yarn of the sampling length, the ratio of the number of staple
fibers in the double-strand yarn, whose length equal to or greater
than 60% of a setup fiber length of 65 mm, to the total number of
the staple fibers is controlled within 65.about.70%. The dispersion
of the weight distribution of the average length of the yarn is
controlled within 35.about.45%. The number of neps or indurations
on the surface of the knitted textile article in this example is
measured to be less than 20 per square meter. Obviously, compared
to the traditional textile article woven from the yarns made from
the stretch-broken staple fibers of the prior art, the textile
article woven from the yarns made from the stretch-broken staple
fibers according to the invention has better smoothness.
[0041] From the above detailed description of the present
invention, it can be clearly understood that the single-ply yarn
according to the present invention or each ply yarn in the ply yarn
itself is within a sampling length of not more than 10 meters,
among multiple short fibers The ratio of the number of short fibers
with a length equal to or greater than 60% of the set fiber length
to the total number of multiple short fibers is equal to or greater
than 60%, and the set fiber length is not less than 65 mm. In
addition, the weight distribution dispersion of the average length
of the single strand yarn is equal to or less than 60%. Therefore,
according to the present invention, the single-ply yarn and the
double-ply yarn have high strength and high diameter uniformity. In
addition, textiles made from fibers formed into yarns and woven by
the stretch-break method according to the present invention have
better smoothness.
[0042] With the detailed description of the above preferred
embodiments of the invention, it is clear to understand that within
the single-strand yarn of the sampling length or each single-strand
yarn of the plied yarn, the ratio of the number of the staple
fibers, whose length is equal to or greater than 60% of a setup
fiber length, to the total number of the staple fibers is equal to
or greater than 60%, where the sampling length is equal to or less
than 10 meters and the setup fiber length is equal to or larger
than 65 mm. Moreover, the dispersion of the weight distribution in
the average length of said one single-strand yarn is equal to or
less than 60%. Therefore, the single-strand yarn and the plied yarn
according to the invention have high strength and high diameter
uniformity. Moreover, the textile article woven from the yarns made
from the stretch-broken staple fibers according to the invention
has better smoothness.
[0043] With the example and explanations above, the features and
spirits of the invention will be hopefully well described. Those
skilled in the art will readily observe that numerous modifications
and alterations of the device may be made while retaining the
teaching of the invention. Accordingly, the above disclosure should
be construed as limited only by the meters and bounds of the
appended claims.
* * * * *