U.S. patent application number 16/409444 was filed with the patent office on 2020-07-16 for bicomponent elastic fiber composite material, elastic multifilament fiber including the composite material, and the manufacturin.
This patent application is currently assigned to GOLDEN PHOENIX FIBERWEBS, INC.. The applicant listed for this patent is GOLDEN PHOENIX FIBERWEBS, INC.. Invention is credited to Kenneth CHENG, Eric SHYUU.
Application Number | 20200224336 16/409444 |
Document ID | / |
Family ID | 70413164 |
Filed Date | 2020-07-16 |
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United States Patent
Application |
20200224336 |
Kind Code |
A1 |
CHENG; Kenneth ; et
al. |
July 16, 2020 |
BICOMPONENT ELASTIC FIBER COMPOSITE MATERIAL, ELASTIC MULTIFILAMENT
FIBER INCLUDING THE COMPOSITE MATERIAL, AND THE MANUFACTURING
METHOD FOR THE SAME
Abstract
A bicomponent elastic fiber composite material, which has a
linear density of 20-150 deniers, a stretchability of 300-600%, and
a deformation rate of 0-25% after stretching to 400%. The
bicomponent elastic fiber composite material includes an inner core
fiber and a sheath outer layer, wherein the inner core fiber
includes a polystyrne copolymer material of a styrene-butadiene
block copolymer (SBS), a styrene-ethylene-butylene-styrene block
copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or
includes a thermoplastic polystyrene elastomer (TPS). The sheath
outer layer includes polypropylene (PP) or polyethylene (PE).
Thereby, the present invention can realize zero pollution while
recycled and reused. In addition, the present invention has
excellent properties of elasticity, dyeability, acid and alkali
resistance, quick-drying and non-absorbency, antibacterial and
deodorizing, and has a soft texture. Further, the elastic
multifilament fiber including the composite material has the full
effect of the bicomponent elastic fiber composite material.
Inventors: |
CHENG; Kenneth; (Taipei
City, TW) ; SHYUU; Eric; (Taipei City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
GOLDEN PHOENIX FIBERWEBS, INC. |
TAINAN CITY |
|
TW |
|
|
Assignee: |
GOLDEN PHOENIX FIBERWEBS,
INC.
TAINAN CITY
TW
|
Family ID: |
70413164 |
Appl. No.: |
16/409444 |
Filed: |
May 10, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D10B 2401/061 20130101;
D10B 2321/021 20130101; D10B 2331/04 20130101; D10B 2401/14
20130101; D10B 2321/121 20130101; D01F 8/14 20130101; D01F 8/10
20130101; D10B 2321/022 20130101; D02J 1/228 20130101 |
International
Class: |
D01F 8/10 20060101
D01F008/10; D01F 8/14 20060101 D01F008/14; D02J 1/22 20060101
D02J001/22 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 10, 2019 |
TW |
108101077 |
Claims
1. A bicomponent elastic fiber composite material, which is a
bicomponent fiber structure with a core sheath or a core spun,
comprising: an inner core fiber including a polystyrene copolymer
material of a styrene-butadiene block copolymer (SBS), a
styrene-ethylene-butylene-styrene block copolymer (SEBS) or a
thermoplastic polyolefin elastomer (TPO), or including a
thermoplastic polystyrene elastomer (TPS); and a sheath outer layer
cladding to an outer surface of the inner core fiber, and including
polypropylene (PP) or polyethylene (PE); wherein a ratio of a
thickness of the sheath outer layer to a radius of the inner core
fiber is between 1:9 to 9:1; wherein the bicomponent elastic fiber
composite material has a linear density of 20-150 deniers and a
stretchability of 300-600%; and wherein the bicomponent elastic
fiber composite material has a deformation rate of 0-25% after
stretching to 400%.
2. The bicomponent elastic fiber composite material according to
claim 1, wherein the inner core fiber has a stretchability of
100-600%.
3. The bicomponent elastic fiber composite material according to
claim 1, wherein the sheath outer layer has dyeability.
4. The bicomponent elastic fiber composite material according to
claim 3, wherein the polypropylene has a graft-dyeing base for
dyeing.
5. The bicomponent elastic fiber composite material according to
claim 1, wherein the ratio of the thickness of the sheath outer
layer to the radius of the inner core fiber is 9:1, and the
bicomponent elastic fiber composite material has a linear density
of 30 deniers and a stretchability of 500%, and the bicomponent
elastic fiber composite material has a deformation rate of 1% after
stretching to 400%.
6. A manufacturing method for an elastic multifilament fiber,
comprising the following steps: a stretching step: stretching a
bicomponent elastic fiber composite material to several times; a
surrounding step: commonly surrounding a plurality of surrounding
fibers to outside of the bicomponent elastic fiber composite
material, and wherein an elasticity of each of the surrounding
fibers is lower than that of the bicomponent elastic fiber
composite material; an air entangling step: commonly forming a
plurality of air entanglement knots on the plurality of surrounding
fibers and the bicomponent elastic fiber composite material to form
an elastic multifilament fiber, and wherein the plurality of air
entanglement knots divide the elastic multifilament fiber into a
plurality of sections; and a relaxing step: relaxing the
bicomponent elastic fiber composite material such that the elastic
multifilament fiber contracts back to a normal state by the
deformation rate of the bicomponent elastic fiber composite
material, and thus, in each section of the elastic multifilament
fiber, a length of the bicomponent elastic fiber composite material
is equal to a distance between adjacent two air entanglement knots,
and a length of each of the surrounding fibers is greater than the
distance between adjacent two air entanglement knots; wherein the
bicomponent elastic fiber composite material is a bicomponent fiber
structure with a core sheath or a core spun, comprises an inner
core fiber and a sheath outer layer; wherein the inner core fiber
includes a polystyrene copolymer material of a styrene-butadiene
block copolymer (SBS), a styrene-ethylene-butylene-styrene block
copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or
includes a thermoplastic polystyrene elastomer (TPS); wherein the
sheath outer layer clads to an outer surface of the inner core
fiber, and includes polypropylene (PP) or polyethylene (PE);
wherein a ratio of a thickness of the sheath outer layer to a
radius of the inner core fiber is between 1:9 to 9:1; wherein the
bicomponent elastic fiber composite material has a linear density
of 20-150 deniers and a stretchability of 300-600%; and wherein the
bicomponent elastic fiber composite material has a deformation rate
of 0-25% after stretching to 400%.
7. The manufacturing method according to claim 6, wherein the
bicomponent elastic fiber composite material is stretched to three
times in the stretching step.
8. The manufacturing method according to claim 6, wherein the
material of each of the surrounding fibers is polyester.
9. The manufacturing method according to claim 6, wherein the
sheath outer layer has dyeability.
10. The manufacturing method according to claim 6, wherein the
polypropylene has a graft-dyeing base for dyeing.
11. The manufacturing method according to claim 6, wherein the
ratio of the thickness of the sheath outer layer to the radius of
the inner core fiber is 9:1, and the bicomponent elastic fiber
composite material has a linear density of 30 deniers and a
stretchability of 500%, and the bicomponent elastic fiber composite
material has a deformation rate of 1% after stretching to 400%.
12. An elastic multifilament fiber, comprising: a bicomponent
elastic fiber composite material and a plurality of surrounding
fibers; wherein the bicomponent elastic fiber composite material is
a bicomponent fiber structure with a core sheath or a core spun,
comprises an inner core fiber and a sheath outer layer; wherein the
inner core fiber includes a polystyrene copolymer material of a
styrene-butadiene block copolymer (SBS), a
styrene-ethylene-butylene-styrene block copolymer (SEBS) or a
thermoplastic polyolefin elastomer (TPO), or includes a
thermoplastic polystyrene elastomer (TPS); wherein the sheath outer
layer clads to an outer surface of the inner core fiber, and
includes polypropylene (PP) or polyethylene (PE); wherein a ratio
of a thickness of the sheath outer layer to a radius of the inner
core fiber is between 1:9 to 9:1; wherein the bicomponent elastic
fiber composite material has a linear density of 20-150 deniers and
a stretchability of 300-600%; wherein the bicomponent elastic fiber
composite material has a deformation rate of 0-25% after stretching
to 400%; wherein the plurality of surrounding fibers commonly
surround outside of the bicomponent elastic fiber composite
material and commonly contact the bicomponent elastic fiber
composite material by a plurality of air entanglement knots, and an
elasticity of each of the surrounding fibers is lower than that of
the bicomponent elastic fiber composite material; wherein the
plurality of air entanglement knots divide the elastic
multifilament fiber into a plurality of sections; and wherein in
each section of the elastic multifilament fiber, a length of the
bicomponent elastic fiber composite material is equal to a distance
between adjacent two air entanglement knots, and a length of each
of the surrounding fibers is greater than the distance between
adjacent two air entanglement knots.
13. The elastic multifilament fiber according to claim 12, wherein
the material of each of the surrounding fibers is polyester.
14. The elastic multifilament fiber according to claim 12, wherein
the sheath outer layer has dyeability.
15. The elastic multifilament fiber according to claim 12, wherein
the polypropylene has a graft-dyeing base for dyeing.
16. The elastic multifilament fiber according to claim 12, wherein
the ratio of the thickness of the sheath outer layer to the radius
of the inner core fiber is 9:1, and the bicomponent elastic fiber
composite material has a linear density of 30 deniers and a
stretchability of 500%, and the bicomponent elastic fiber composite
material has a deformation rate of 1% after stretching to 400%.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority of Taiwanese patent
application No. 108101077, filed on Jan. 10, 2019, which is
incorporated herewith by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0002] The present invention relates to a fiber composite material,
in particular, to a bicomponent elastic fiber composite material
having elasticity which is formed by using a thermoplastic elastic
material to constitute an inner core fiber, using a thermoplastic
material to constitute a sheath outer layer, and cladding the
sheath outer layer to a surface of the inner core fiber; an elastic
multifilament fiber including the composite material; and a
manufacturing method for the same.
2. The Prior Arts
[0003] In recent years, with the prevalence of the fashion of
leisure sports, the sales volume of functional sports fabrics have
also increased. Meanwhile, the demand for fabric functionality has
gradually increased as well. For example, in addition to being
lighter, moisture wicking, antibacterial, and deodorant, it is
further desired that an elastic fiber fabric having a close-fitting
comfort can reduce restraint feeling. Therefore, in material
technology, there is a need for more moving possibility between
stretching force and restoring force, and a need for striking an
optimal balance between functionality and comfort.
[0004] Since the process steps have been improved year by year, the
elastic textile fiber technology has already have advantages of
easier-to-manufacturing, processing, durability, rapid production
efficiency, and low cost and has been widely used in many
functional sports fabrics.
[0005] However, in the conventional art, the general elastic fiber
fabric still has the following disadvantages to be overcome.
[0006] First, take an elastic fiber fabric made of a diene-based
elastic fiber (elastic thread) as an example, it is not suitable
for a user who has severe allergic symptoms to latex. Generally,
synthetic rubber such as neoprene, butyl rubber, and the like is
used instead to avoid allergic reactions. However, the cost of
synthetic rubber is generally higher, so that the elastic fiber
fabric made of synthetic rubber is less competitive.
[0007] In addition, the materials which are more widely used to
make elastic fiber fabrics also include polyurethane fiber
(Spandex). However, there are several problems for polyurethane
fiber: first, there are problems of difficulties in recycling;
second, it produces dioxin which seriously pollutes the environment
while burning; third, it has poor weather resistance and light
resistance which affect the service life.
[0008] Further, polyether ester elastic fibers are also common
materials for elastic fiber fabrics. However, since the fiber
hardness of the polyether ester elastic fiber is higher, it affects
the softness of the elastic fiber fabric. Meanwhile, since the
processing conditions are also rigorous, more precise processing
machines must be used and the price is considerably expensive as a
result.
[0009] Moreover, each of the elastic fibers is formed by directly
drawing the one-component elastomer, resulting in an inter-adhesion
problem among multiple elastic fibers of the elastic fiber
fabric.
[0010] In particular, the fabric has a high-temperature requirement
while dyeing and setting (thermal dimensional stability,
antiwrinkling). Further, for example, elastic fibers of
polyurethane fibers (Spandex), polyester, and polyamide (Nylon)
must withstand a high temperature of 180-240.degree. C. with
thermosetting. Moreover, the thermosetting temperature of such
polyurethane elastic fibers is above 180.degree. C., which is
higher than the melting point of polypropylene (PP) fibers of
160.degree. C. As a result, after cladding the polypropylene fibers
to such polyurethane elastic fibers to form yarns, the effect of
thermosetting is affected by the difference in glass transition
(Tg) between different materials. It is well known that when the
temperature is too low, the elastic fiber fabric cannot be
wrinkle-free and stabilized in size; however, when the temperature
is too high, the polypropylene fiber will convert into fluid state,
lose its fiber configuration, and will be unusable as a result.
[0011] The existing polypropylene fiber is a fiber which becomes
colored by adding colored masterbatch while producing the fibers.
However, this will result in lower color diversity than the
traditional method in which the cloth is dyed and finished after
weaving.
[0012] For example, the polyester fiber has a dyeing temperature of
about 130-135.degree. C., the Nylon fiber (Nylon 66) has a dyeing
temperature of about 110.degree. C., and the OP elastic yarn has a
dyeing temperature of about 125.degree. C., which is quite high. In
particular, although the OP elastic yarn (polymerized yarn) has
dyeability, it is not colored, that is, the dye adheres only at the
surface, so the overall dyeing fastness is extremely poor.
SUMMARY OF THE INVENTION
[0013] A primary objective of the present invention is to provide a
bicomponent elastic fiber composite material, wherein the inner
core fiber is constituted of a thermoplastic elastic material and
the sheath outer layer is constituted of a thermoplastic material,
so that the present invention has excellent elasticity.
[0014] Another objective of the present invention is to provide a
bicomponent elastic fiber composite material which has excellent
dyeability.
[0015] Yet another objective of the present invention is to provide
a bicomponent elastic fiber composite material which has the
advantages of acid and alkali resistance, quick-drying and
non-absorbency, antibacterial and deodorizing, recyclable, and
reusable. It has a soft texture, which is suitable for applying in
thin coats, close-fitting clothing or diapers, capable of making
the dressing more comfortable.
[0016] Still another objective of the present invention is to
provide an elastic multifilament fiber including the composite
material and the manufacturing method for the same, wherein the
made elastic multifilament fiber has the full effect of the
bicomponent elastic fiber composite material.
[0017] In order to achieve the objectives mentioned above, the
present invention provides a bicomponent elastic fiber composite
material, which is a bicomponent fiber structure with a core sheath
or a core spun, comprising an inner core fiber and a sheath outer
layer. The inner core fiber includes a polystyrene copolymer
material of a styrene-butadiene block copolymer (SBS), a
styrene-ethylene-butylene-styrene block copolymer (SEBS) or a
thermoplastic polyolefin elastomer (TPO), or includes a
thermoplastic polystyrene elastomer (TPS). The sheath outer layer
clads to an outer surface of the inner core fiber and includes
polypropylene (PP) or polyethylene (PE).
[0018] Wherein a ratio of a thickness of the sheath outer layer to
a radius of the inner core fiber is between 1:9 to 9:1.
[0019] Wherein the bicomponent elastic fiber composite material has
a linear density of 20-150 deniers and a stretchability of
300-600%.
[0020] Wherein the bicomponent elastic fiber composite material has
a deformation rate of 0-25% after stretching to 400%.
[0021] Preferably, the inner core fiber has a stretchability of
100-600%.
[0022] Preferably, the sheath outer layer has dyeability.
[0023] Preferably, the polypropylene has a graft-dyeing base for
dyeing.
[0024] Preferably, the ratio of the thickness of the sheath outer
layer to the radius of the inner core fiber is 9:1, and the
bicomponent elastic fiber composite material has a linear density
of 30 deniers and a stretchability of 500%, and the bicomponent
elastic fiber composite material has a deformation rate of 1% after
stretching to 400%.
[0025] In order to achieve the objectives mentioned above, the
present invention provides a manufacturing method for an elastic
multifilament fiber including a composite material, which includes
the following steps:
[0026] a stretching step: stretching a bicomponent elastic fiber
composite material to several times;
[0027] a surrounding step: commonly surrounding a plurality of
surrounding fibers to outside of the bicomponent elastic fiber
composite material, and wherein an elasticity of each of the
surrounding fibers is lower than that of the bicomponent elastic
fiber composite material;
[0028] an air entangling step: commonly forming a plurality of air
entanglement knots on the plurality of surrounding fibers and the
bicomponent elastic fiber composite material to form an elastic
multifilament fiber, and wherein the plurality of air entanglement
knots divide the elastic multifilament fiber into a plurality of
sections; and
[0029] a relaxing step: relaxing the bicomponent elastic fiber
composite material such that the elastic multifilament fiber
contracts back to a normal state by the deformation rate of the
bicomponent elastic fiber composite material, and thus, in each
section of the elastic multifilament fiber, a length of the
bicomponent elastic fiber composite material is equal to a distance
between adjacent two air entanglement knots, and a length of each
of the surrounding fibers is greater than the distance between
adjacent two air entanglement knots.
[0030] Preferably, the bicomponent elastic fiber composite material
is stretched to three times in the stretching step.
[0031] Preferably, the material of each of the surrounding fibers
is polyester.
[0032] In order to achieve the objectives mentioned above, the
present invention provides an elastic multifilament fiber including
a composite material, which includes a bicomponent elastic fiber
composite material and a plurality of surrounding fibers.
[0033] Wherein the plurality of surrounding fibers commonly
surround outside of the bicomponent elastic fiber composite
material and commonly contact the bicomponent elastic fiber
composite material by a plurality of air entanglement knots, and an
elasticity of each of the surrounding fibers is lower than that of
the bicomponent elastic fiber composite material.
[0034] Wherein the plurality of air entanglement knots divide the
elastic multifilament fiber into a plurality of sections
[0035] Wherein in each section of the elastic multifilament fiber,
a length of the bicomponent elastic fiber composite material is
equal to a distance between adjacent two air entanglement knots,
and a length of each of the surrounding fibers is greater than the
distance between adjacent two air entanglement knots.
[0036] Preferably, the material of each of the surrounding fibers
is polyester.
[0037] The effect of the present invention is that the inner core
fiber is constituted of a thermoplastic elastic material and the
sheath outer layer is constituted of a thermoplastic material, such
that the bicomponent elastic fiber composite material and the
elastic multifilament fiber including the composite material of the
present invention both have excellent elasticity.
[0038] Further, the bicomponent elastic fiber composite material
and the elastic multifilament fiber including the composite
material of the present invention can provide excellent dyeability
by the dyeable sheath outer layer.
[0039] Moreover, the bicomponent elastic fiber composite material
and the elastic multifilament fiber including the composite
material of the present invention can both provide the advantages
of acid and alkali resistance, quick-drying and non-absorbency,
antibacterial and deodorizing, recyclable, and reusable. It has a
soft texture, which is suitable for applying in thin coats,
close-fitting clothing or diapers, capable of making the dressing
more comfortable.
[0040] In addition, the polypropylene (PP) constituting the sheath
outer layer has a characteristic of low-temperature dyeing itself
(a melting point about 70-110.degree. C. lower than 160.degree.
C.), which is far lower than 130-135.degree. C. of polyester (PET),
110.degree. C. of nylon (Nylon 66), 125.degree. C. of OP elastic
yarn, such that the thermal energy and the dyeing time can be
reduced to achieve energy-saving effect.
[0041] Furthermore, the bicomponent elastic fiber composite
material of the present invention can utilize the sheath outer
layer and the inner core fiber for one-time fiber drawing
production, which not only has a simpler production process but
also has a lower raw material cost than the commercially available
elastic yarn (Spandex). Further, there is almost no pollutant
generated during the production process. Moreover, it is very easy
to recycle and reuse to achieve the circular economy of recycling
and reuse.
BRIEF DESCRIPTION OF THE DRAWINGS
[0042] FIG. 1 is a schematic view illustrating the structure of a
bicomponent elastic fiber composite material of the present
invention;
[0043] FIG. 2 is a cross-sectional view illustrating an elastic
fiber fabric produced by feeding a plurality of bicomponent elastic
fiber composite materials of the present invention into a loom in a
multifilament manner;
[0044] FIG. 3 is a flow chart illustrating the manufacturing method
for an elastic multifilament fiber of the present invention;
[0045] FIG. 4 is a schematic view illustrating the stretching step,
surrounding step, air entangling step of the manufacturing method
for the elastic multifilament fiber of the present invention;
and
[0046] FIG. 5 is a schematic view illustrating the relaxing step of
the manufacturing method for the elastic multifilament fiber of the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0047] Embodiments of the present invention will be described in
more detail below with reference to the drawings and the reference
numerals, such that those skilled in the art can implement it after
studying this specification.
[0048] Please refer to FIG. 1 which is a schematic view
illustrating the structure of a bicomponent elastic fiber composite
material 1 of the present invention. The present invention provides
a bicomponent elastic fiber composite material 1 comprising an
inner core fiber 10 and a sheath outer layer 20. The sheath outer
layer 20 clads to an outer surface of the inner core fiber 10,
wherein the inner core fiber 10 is constituted of a thermoplastic
elastic material and the sheath outer layer 20 is constituted of a
thermoplastic material, and thus the bicomponent elastic fiber
composite material 1 of the present invention has excellent
elasticity. Preferably, the sheath outer layer 20 is constituted of
a dyeable thermoplastic material, and thus the bicomponent elastic
fiber composite material 1 of the present invention may also have
dyeability.
[0049] In particular, the bicomponent elastic fiber composite
material 1 of the present invention is essentially a bicomponent
fiber structure with a core sheath or a core spun. In particular,
the bicomponent elastic fiber composite material 1 of the present
invention has a linear density of 20-150 deniers and a
stretchability of 300-600%. The bicomponent elastic fiber composite
material 1 of the present invention has a deformation rate of 0-25%
after stretching to 400%.
[0050] Further, the inner core fiber 10 includes a polystyrene
copolymer material of a styrene-butadiene block copolymer (SBS), a
styrene-ethylene-butylene-styrene block copolymer (SEBS) or a
thermoplastic polyolefin elastomer (TPO), or includes a
thermoplastic polystyrene elastomer (TPS). Furthermore, the inner
core fiber 10 has a stretchability of 100-600%.
[0051] It is well known that the thermoplastic polystyrene
elastomers (TPS) mentioned above, which are also referred to as
styreneic block copolymers or SBCs for short, are a type of
thermoplastic elastomer with the largest production currently in
the world and having the properties most similar to that of rubber.
Currently, there are mainly four types in the species of SBCs
series, that is: styrene-butadiene block copolymer (SBS),
styrene-isoprene-styrene block copolymer (SIS),
styrene-ethylene-butylene-styrene block copolymer (SEBS) and
styrene-ethylene-propylene-styrene block copolymer (SEPS), wherein
SEBS and SEPS are hydrogenated copolymers of SBS and SIS,
respectively.
[0052] Further, the hard segment of the thermoplastic polyolefin
elastomer (TPO) is a polyolefin material such as polypropylene (PP)
or polyethylene (PE) or the like, wherein the soft segment thereof
is a rubber such as ethylene propylene diene monomer (EPDM) and the
like. Generally, it is formed by polymerization using metallocene
as a catalyst, wherein the hard segment and the soft segment are
directly combined by a covalent bond, so that this kind of the
thermoplastic polyolefin elastomer (TPO) is also referred to as
M-POE.
[0053] In addition, the sheath outer layer 20 may include
polypropylene (PP) or polyethylene (PE) and has dyeability. A ratio
of a thickness of the sheath outer layer 20 to a radius of the
inner core fiber 10 may be between 1:9 to 9:1 for adjusting the
best properties of softness, stretchability, restoring rate,
tensile stress and the like according to practical needs. The
polypropylene mentioned above may preferably have graft-dyeing
bases for enhancing dyeability.
[0054] In a preferred embodiment, the ratio of the thickness of the
sheath outer layer 20 to the radius of the inner core fiber 10 is
9:1, and the bicomponent elastic fiber composite material 1 has a
linear density of 30 deniers and a stretchability of 500%, and the
bicomponent elastic fiber composite material 1 has a deformation
rate of 1% after stretching to 400%.
[0055] Since the polypropylene (PP) constituting the sheath outer
layer 20 has a characteristic of low-temperature dyeing itself
(about 70-110.degree. C. lower than 160.degree. C.), which is much
lower than 180.degree. C. of polyurethane fibers (Spandex),
130-135.degree. C. of polyester (PET), 110.degree. C. of Nylon 66,
and 125.degree. C. of the OP elastic yarn, so the thermal energy
and the dyeing time can be reduced to achieve energy-saving
effect.
[0056] Furthermore, the present invention can utilize the sheath
outer layer 20 and the inner core fiber 10 for one-time fiber
drawing production, which not only has a simpler production process
but also has a lower raw material price than the commercially
available elastic yarn (Spandex). Further, there is almost no
pollutant generated during the production process. Moreover, it is
very easy to recycle and reuse to achieve the circular economy of
recycling and reuse.
[0057] In summary, the bicomponent elastic fiber composite material
1 of the present invention is characterized in that it has the
advantages of acid and alkali resistance, quick-drying and
non-absorbency, antibacterial and deodorizing, recyclable, and
reusable. It has a soft texture, which is suitable for applying in
thin coats, close-fitting clothing or diapers, capable of making
the dressing more comfortable. Particularly, it has high elasticity
and is easy to be dyed, and the dyeing fastness thereof is better.
Furthermore, it can be mix-weaved with other fibers into functional
fabrics with different high functionality, such as sports clothes
or close-fitting clothing.
[0058] In addition, the bicomponent elastic fiber composite
material 1 of the present invention has the characteristics of
lower glass transition point, which can satisfy the dyeing and
setting conditions of the polypropylene fiber while improving the
problem of the fabric in boarding (for example, thermal dimensional
stability), and thereby improved the situation that the yarn
exchanges between face and back or the color fastness is
deteriorated easily because the fibers are not capable of being
dyed when the fiber is interweaved with fibers such as
polyesters.
[0059] Further, fibers utilizing polypropylene having the
graft-dyeing bases as the sheath outer layer 20 can have a better
dyeability (SDY 110.degree. C. dyeing) than the general
polypropylene fiber, and have the same grade of washing fastness
(SDY 110.degree. C. dyeing) as polyester (PET). In particular, the
practical needs of optimum properties of softness, stretchability,
restoring rate, tensile stress and the like can be satisfied by
adjusting the ratio of the thickness of the sheath outer layer 20
to the radius of the inner core fiber 10.
[0060] The following are explanations about further producing two
types of elastic fiber fabrics by using the bicomponent elastic
fiber composite material 1 of the present invention.
[0061] First, please refer to FIG. 2 which is a cross-sectional
view illustrating an elastic fiber fabric 100 produced by feeding a
plurality of bicomponent elastic fiber composite materials 1 of the
present invention into a loom in a multifilament manner. A
plurality of the bicomponent elastic fiber composite materials 1 of
a preferred embodiment of the present invention are directly fed
into a loom (not shown) in a multifilament manner to be woven into
an elastic fiber fabric 100. Thus, the made elastic fiber fabric
100 also has the full effect of the described bicomponent elastic
fiber composite material 1.
[0062] Next, please refer to FIGS. 3 to 5. FIG. 3 is a flow chart
of the manufacturing method for an elastic multifilament fiber 3 of
the present invention; FIG. 4 is a schematic view illustrating the
stretching step, surrounding step, air entangling step of the
manufacturing method for the elastic multifilament fiber 3 of the
present invention; and FIG. 5 is a schematic view illustrating the
relaxing step S40 of the manufacturing method for the elastic
multifilament fiber 3 of the present invention. The present
invention provides a manufacturing method for an elastic
multifilament fiber 3, which includes a stretching step S10, a
surrounding step S20, an air entangling step S30, and a relaxing
step S40.
[0063] Stretching step S10: stretching a bicomponent elastic fiber
composite material 1 to several times. Wherein, it is preferable to
be stretched to three times.
[0064] Surrounding step S20: commonly surrounding a plurality of
surrounding fibers 2 to outside of the bicomponent elastic fiber
composite material 1, and wherein an elasticity of each of the
surrounding fibers 2 is lower than that of the bicomponent elastic
fiber composite material 1. Preferably, the material of each of the
surrounding fibers 2 is polyester, which is almost inelastic.
[0065] Air entangling step S30: commonly forming a plurality of air
entanglement knots P on the plurality of surrounding fibers 2 and
the bicomponent elastic fiber composite material 1 to form an
elastic multifilament fiber 3. The plurality of air entanglement
knots P divide the elastic multifilament fiber 3 into a plurality
of sections 31.
[0066] Relaxing step S40: relaxing the bicomponent elastic fiber
composite material 1 such that the elastic multifilament fiber 3
contracts back to a normal state by the deformation rate of the
bicomponent elastic fiber composite material 1. So that, in each
section 31 of the elastic multifilament fiber 3, a length of the
bicomponent elastic fiber composite material 1 is equal to a
distance between adjacent two air entanglement knots P, and a
length of each of the surrounding fibers 2 is greater than the
distance between adjacent two air entanglement knots P. The made
elastic multifilament fiber 3 has the full effect of the described
bicomponent elastic fiber composite material 1.
[0067] A plurality of bicomponent elastic multifilament fibers 3 of
the present invention may be further fed into a loom (not shown) to
be woven into an elastic fiber fabric (not shown). Thus, the made
elastic fiber fabric also has the full effect of the described
bicomponent elastic fiber composite material 1.
[0068] The mentioned above are only preferred embodiments for
explaining the present invention but intend to limit the present
invention in any forms, so that any modifications or verification
relating to the present invention made in the same spirit of the
invention should still be included in the scope of the invention as
intended to be claimed.
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