U.S. patent application number 10/311601 was filed with the patent office on 2003-08-07 for yarn having laminated structure.
Invention is credited to Omori, Michiko, Shimazaki, Sataro.
Application Number | 20030148118 10/311601 |
Document ID | / |
Family ID | 18683944 |
Filed Date | 2003-08-07 |
United States Patent
Application |
20030148118 |
Kind Code |
A1 |
Omori, Michiko ; et
al. |
August 7, 2003 |
Yarn having laminated structure
Abstract
A laminated yarn, which is characterized in that it is prepared
by a method comprising evaporating an antibacterial metal onto a
synthetic resin film to form a vapor deposition membrane, adhering
the resultant synthetic resin films so as for the vapor deposition
membrane to be positioned inside, and cutting the resultant
laminated film having a sandwiched structure in a long narrow form
along its longitudinal direction. The yarn is free from the
lowering of antibacterial activity by repeated washing, is
excellent in the prevention of rise in its temperature, the
insulation of heat and an electromagnetic wave, and antistatic
properties, and has excellent appearance.
Inventors: |
Omori, Michiko; (Hyogo,
JP) ; Shimazaki, Sataro; (Ikuno-ku, Osaka-shi,
JP) |
Correspondence
Address: |
OBLON, SPIVAK, MCCLELLAND, MAIER & NEUSTADT, P.C.
1940 DUKE STREET
ALEXANDRIA
VA
22314
US
|
Family ID: |
18683944 |
Appl. No.: |
10/311601 |
Filed: |
December 18, 2002 |
PCT Filed: |
March 19, 2001 |
PCT NO: |
PCT/JP01/02193 |
Current U.S.
Class: |
428/457 ; 28/147;
428/36.3 |
Current CPC
Class: |
Y10T 156/1084 20150115;
Y10T 428/31678 20150401; D02G 3/12 20130101; Y10T 428/1369
20150115; D02G 3/06 20130101; D02G 3/449 20130101 |
Class at
Publication: |
428/457 ; 28/147;
428/36.3 |
International
Class: |
B65D 001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 19, 2000 |
JP |
2000-183342 |
Claims
1. A laminated yarn characterized in that an antibacterial metal is
vapor-deposited onto a synthetic resin film to form a vapor
deposition membrane, the formed synthetic resin films are adhered
so that a vapor deposition membrane may be placed inside, and
resultant laminated film obtained by being adhered into a
sandwiched structure is cut in lengthwise direction to give a long
and narrow form.
2. The laminated yarn according to claim 1, characterized in that a
coat layer is prepared on a surface opposite to a surface on which
vapor deposition membrane of synthetic resin film is formed.
3. The laminated yarn according to claim 1, characterized in that a
coat layer is prepared between a synthetic resin film and a vapor
deposition membrane or on a vapor deposition membrane.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a laminated yarn, and in
particular, to have various excellent characteristics, such as
aesthetic appreciation property, antibacterial property, washing
resistance, prevention of temperature rising, insulation of heat,
antistatic property, flexibility, insulation of electromagnetic
wave.
BACKGROUND ART
[0002] In recent years, articles equipped with antibacterial
property is required with development of hygienic way of thinking,
and it goes without saying that not only in gauze and bandage for
medical treatments, but in clothes or dishcloth materials equipped
with antibacterial property is increasingly required. In these
gauze and the like equipped with antibacterial properties,
antibacterial yarns equipped with antibacterial property are used
as a material.
[0003] As such antibacterial yarns, fine metallic yarns in which
silver and copper are drawn long and slender, metal plated yarns
with silver and steel plated on a surface of yarns, such as
synthetic fibers, and yarns including the antibacterial agent that
the antibacterial agent is mixed therein or is applied thereon and
the like are conventionally used.
[0004] Moreover, from a viewpoint of reduction of displeasure to
wearer by static electricity, and of prevention of electrostatic
failure by static electricity over electronic products, various
antistatic textiles are used. As such antistatic textiles, textiles
including carbon fiber, and textiles in which processing by
chemicals is given in silk-reeling process or dyeing process are
conventionally used.
[0005] Moreover, in the medical field, a gauze is rolled on a
suture part of a living body to close the affected part in the case
of an operation, and after the gauze concerned is removed in a
predetermined period, the amount of bleeding from a suture part is
measured for examining procedure after the operation is conducted.
As such gauze, materials blocking X rays including vinyl chloride
yarn or a fine metallic yarn is used in order to easily find out
the applied location.
[0006] In addition, in order to reduce displeasure caused by
atmospheric temperature variation, clothes in which heat of
vaporization at the time of sweat evaporation is utilized to
accelerate cooling effect, clothes equipped with exothermic
mechanism using evaporation of water content, such as sweat, and
clothes in which electric heating wire is woven are utilized.
[0007] However, when it was required to give various
characteristics, such as antibacterial property, to textiles by
using conventional fine metallic yarns, carbon fiber and the like
in textiles, there have been the following problems.
[0008] Firstly in a fine metallic yarn or metal plated yarn, when
these were used for textiles there was a problem that deterioration
of appearance of the textiles was induced or an antibacterial
property was fallen since the surface oxidizes with aging, a
bleaching agent or the like and the surface was blackened. In
addition, since the metal portions of these fine metallic yarns or
metal plated yarns were easily heated by infrared radiation and the
like, when infrared warming treatment was done with the textiles
including them as a material worn, for example, there was also a
problem that a low-temperature burn was induced.
[0009] Next, in yarns including the antibacterial agent, there was
a problem that antibacterial property was decreased and lost by
repeated washing in a short period of time since the antibacterial
agent was eluted by washing.
[0010] Moreover, since carbon fiber that is one of antistatic yarn
is a black yarn, it has a problem that articles in which the yarn
might be used were limited in view of an appearance of the
articles, and there was a problem of losing antistatic property by
repeated washing when treatment by chemicals was conducted in silk
-reeling process or dyeing process.
[0011] Moreover, although the gauze made of a vinyl chloride yarn
or a fine metallic yarn contributed to X ray imaging, it had a
problem in the function of gauze original as textiles, such as
toxicity or the poor touch and the poor flexibility. Moreover, in
clothes accelerating cooling effect with heat of vaporization at
the time of sweat evaporation, although a fixed thermoregulation
function and a fixed insulation of heat were equipped, they only
had either of the function of cooling or heating, and therefore the
usage was also limited.
[0012] In addition, even if a plurality of these yarns were
combined, it was difficult to manufacture textile products equipped
with a plurality of characteristics, such as antibacterial
property, antistatic property, prevention of temperature rising,
flexibility, an insulation of electromagnetic wave, and good
appearance.
[0013] Then, an object of the present invention is to provide a
laminated yarn equipped with antibacterial activity that is not
decreased even after repeated washing, prevention of temperature
rising, insulation of heat, antistatic property, flexibility,
outstanding insulation of electromagnetic wave and the like, and
also equipped with outstanding good appearance.
DISCLOSURE OF THE INVENTION
[0014] Namely, a laminated yarn according to the present invention
is characterized in that antibacterial metal is vapor-deposited
onto a synthetic resin film to form a vapor deposition membrane,
the formed synthetic resin films are adhered so that a vapor
deposition membrane may be placed inside, and resultant laminated
film obtained by being adhered into a sandwiched structure is cut
in lengthwise direction to give a long and narrow form.
[0015] Moreover, a coat layer may be prepared on a surface of
synthetic resin film opposite to a surface on which vapor
deposition membrane is formed, and a coat layer may be prepared
between a synthetic resin film and a vapor deposition membrane or
on a vapor deposition membrane.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a view typically showing a structure of a
laminated yarn;
[0017] FIG. 2 is a graph showing a result of an examination of
prevention of temperature rising;
[0018] FIG. 3, FIG. 4, and FIG. 5 are views typically showing
structures of other laminated yarns.
BEST MODE FOR CARRYING OUT THE INVENTION
[0019] Hereinafter, embodiments of the present invention will be
described based on drawings.
[0020] FIG. 1 is a view showing typically a structure of a
laminated yarn 1 according to the present invention. As is shown in
this figure, a laminated yarn 1 is a yarn having a sandwiched
structure in which a vapor deposition membrane 12 made of an
antibacterial metal is sandwiched by synthetic resin films 11, and
is formed by a procedure as shown below.
[0021] First, antibacterial metal is vapor-deposited by a vacuum
deposition method or an ion vacuum deposition and the like to form
a vapor deposition membrane 12 on a synthetic resin film 11. Next,
the synthetic resin films 11 with vapor deposition membrane 12
formed thereon are adhered with adhesive so that the vapor
deposition membranes may be placed inside to manufacture a
laminated film with a sandwiched structure in which antibacterial
metal is sandwiched between the synthetic resin films. Finally, the
laminated film is cut in lengthwise direction and a laminated yarn
1 is obtained.
[0022] Here, synthetic resin film here is a film made of polyester,
nylon, polyethylene, polypropylene and the like, and a thickness is
about 4 to 50 microns, and preferably about 4 to 12 microns.
[0023] Moreover, metals that is used here as layer are metals
having antibacterial property in which ion exchange is enabled,
such as silver, copper, and zinc, especially, silver is the optimal
in view of anti-rust property and high antibacterial ability. A
thickness of the vapor deposition membrane 12 is about 20 to 100
nm, and preferably about 50 to 100 nm in view of guarantee of
function and product cost, and when thickness is set as 700 nm or
more, electromagnetic wave in a broad range from infrared radiation
to X ray may be blocked without a coat layer prepared.
[0024] Furthermore, as the above-described adhesives, although
polyurethane derived adhesives, polyester derived adhesives, and
acrylic adhesives may be mentioned, taking safety of textiles in
which low formalin property is required into consideration,
adhesives of polyurethane derived or polyester derived is
preferable.
[0025] Thus, the laminated yarn 1 is a yarn that has a sandwiched
structure in which a vapor deposition membrane 12 made of
antibacterial metal is sandwiched between synthetic resin films 11,
and is a yarn equipped with color of the antibacterial metal.
[0026] In addition, a width in the case where a laminated film is
cut in lengthwise direction is about 0.1 to 1.0 mm. Especially,
when a balance of various characteristics, such as aesthetic
appreciation property, anti-static property, and insulation of heat
are taken into consideration, the width is desirably about 0.15 to
0.226 mm.
[0027] Thus, since side edges of the vapor deposition membrane 12
are exposed outside and are oxidized or chlorinated, but the
oxidized portion concerned may be removed because of mutual
abrasion between adjoining fibers, and if not removed the portion
concerned may not be observed with naked eyes. Moreover, since it
is protected by the synthetic resin films 11, any portions other
than the side edges of the vapor deposition membrane 12 are not
oxidized or chlorinated. Therefore, even if it receives repeated
washing, or is bleached, antibacterial activity will not be
deteriorated, or the vapor deposition membrane 12 will not be
blackened to deteriorate appearance of textiles.
[0028] Moreover even if heat is added from outside, since most of
the metal vapor deposition membranes 12 are covered with synthetic
resin films, temperature of the laminated yarn 1 will not rise
rapidly to induce low-temperature burn, and even if static
electricity is induced in clothes with the laminated yarn 1 woven
therein, since static electricity may be removed outside through
the vapor deposition membrane 12 not to charge static
electricity.
[0029] Furthermore, since a broad range of electromagnetic wave
from infrared radiation to X-rays is blocked with a work of metal
that forms the vapor deposition membrane, high insulation of
electromagnetic wave and high insulation of heat are equipped, and
since it is based on a synthetic resin film, it has high
flexibility.
[0030] Subsequently, a laminated yarn according to the present
invention will be manufactured and various examinations will be
conducted to describe the present invention still in detail.
[0031] Experiment 1
[0032] (1) Manufacture of a Laminated Yarn
[0033] Solid silver was vapor-deposited by an ion vacuum deposition
method, and a vapor deposition membrane with a thickness of 50 nm
was formed on a polyester film (manufactured by Toyobo Co., Ltd.)
with a thickness of 12 microns. Next, the above-described polyester
films with vapor deposition membrane were adhered together so that
the vapor deposition membranes are placed inside with polyester
derived adhesive to manufacture a laminated film having a
sandwiched structure. Finally, the above-described laminated film
was cut so that it might have width of 226 microns in lengthwise to
obtain a laminated yarn, and the laminated yarn was presented to
following various examinations.
[0034] (2) Antibacterial Examination
[0035] A toweling in which the laminated yarn was woven in as
ground yarn so that 6 mm of space might be given was used for
antibacterial examination conducted by a shake flask method. In
addition, Klebsiella pneumoniae was used as a sample bacillus, and
a cloth (made of nylon) which was not processed was used as
experimental control. Results are shown in Table 1.
1TABLE 1 Number of bacilli Number of immediately residual bacilli
Rate in after after 18 hours reduction of Sample inoculation
35.degree. C. bacilli (%) Toweling 1.1 .times. 10.sup.4 3.0 .times.
10.sup.3 72.7 Unprocessed cloth 1.1 .times. 10.sup.4 1.2 .times.
10.sup.4 -9.1 (made of nylon)
[0036] Next, a tiptoe portion of socks in which the laminated yarn
was knit at intervals of about 1 mm was used, and antibacterial
examination was conducted by a shake flask method. In addition,
Klebsiella pneumoniae was used as a sample bacillus, and a cloth
(made of nylon) which was not processed was used as experimental
control. Results are shown in Table 2.
2TABLE 2 Number of bacilli Number of immediately residual bacilli
Rate in after after 18 hours reduction of Sample inoculation
35.degree. C. bacilli (%) Tiptoe portion of 1.7 .times. 10.sup.4
7.4 .times. 10.sup.3 56.5 socks Unprocessed cloth 1.7 .times.
10.sup.4 1.6 .times. 10.sup.4 5.9 (made of nylon)
[0037] Furthermore, a panty hose in which the laminated yarn was
knit at intervals of 2 mm was used, and antibacterial examination
was conducted by a number of bacilli measuring method by SEK. In
addition, Trichophyton was used as a sample bacillus, and a cloth
(made of nylon) that was not processed was used as experimental
control. Results are shown in Table 3.
3TABLE 3 Number of bacilli Number of immediately residual bacilli
Rate in after after 18 hours reduction of Sample inoculation
37.degree. C. bacilli (%) Panty hose 8.0 .times. 10.sup.4 10 or
less 99.9 or more (growth of bacillus not observed) Unprocessed
cloth 8.0 .times. 10.sup.4 6.3 .times. 10.sup.4 21.3 (made of
nylon)
[0038] As is clear from Tables 1, 2, and 3, when a same number of
sample bacillus was inoculated and then a number of residual
bacilli after predetermined period was compared, a sufficient
difference was observed between the sample and the experimental
control, and it was recognized that the laminated yarn had a
sufficient antibacterial effect. Moreover, it was recognized that
an antimicrobial spectrum of the above-described laminated yarn
showed a broad spectrum from Klebsiella pneumoniae that is bacteria
(procaryote) to Trichophyton that is fungus (eukaryote).
[0039] (3) Washing Resistance Examination
[0040] A toweling in which the laminated yarn was woven in as
ground yarn so that 4 mm of space might be given was washed
predetermined number of times, ant then antibacterial examination
was performed by a shake flask method, and a change of
antibacterial activity by washing was examined. In addition,
Klebsiella pneumoniae was used as a sample bacillus. Results are
shown in Table 4.
4TABLE 4 Number of bacilli Number of immediately residual bacilli
Rate in Number of times after after 18 hours reduction of of
washing inoculation 35.degree. C. bacilli (%) With no washing 1.5
.times. 10.sup.4 4.2 .times. 10.sup.3 72.0 After 50 times of 1.5
.times. 10.sup.4 4.0 .times. 10.sup.2 97.3 washing After 100 times
of 1.5 .times. 10.sup.4 1.0 .times. 10.sup.2 99.3 washing After 200
times 1.5 .times. 10.sup.4 5.2 .times. 10.sup. 99.7 of washing
[0041] Next after a food wrapping cloth in which the laminated yarn
was woven in as ground yarn so that 5 mm of space might be given
was washed predetermined number of times, antibacterial examination
was performed by a shake flask method, and change of antibacterial
activity by washing was examined. In addition, Escherichia coli was
used as a sample bacillus. Results are shown in Table 5.
5TABLE 5 Number of bacilli Number of immediately residual bacilli
Rate in Number of times after after 18 hours reduction of of
washing inoculation 35.degree. C. bacilli (%) With no washing 1.6
.times. 10.sup.4 2.8 .times. 10.sup.3 82.5 After 10 times of 1.6
.times. 10.sup.4 1.6 .times. 10.sup.3 90.0 washing After 20 times
of 1.6 .times. 10.sup.4 2.0 .times. 10.sup.2 98.8 washing After 30
times of 1.6 .times. 10.sup.4 4.0 .times. 10.sup.2 97.5 washing
[0042] Furthermore, after a food wrapping cloth in which the
laminated yarn was woven in as ground yarn so that 5 mm of space
might be given was washed predetermined number of times,
antibacterial examination was performed by a SEK standardized
examining method, and change of antibacterial activity by washing
was examined.
[0043] In addition, Escherichia coli O-157 was used as a sample
bacillus, and a cotton gauze was used as experimental control.
Results are shown in Table 6.
6TABLE 6 Number of bacilli Number of immediately residual bacilli
Rate in Number of times after after 18 hours reduction of of
washing inoculation 37.degree. C. bacilli (%) Cotton gauze 1.6
.times. 10.sup.4 5.2 .times. 10.sup.7 -3.2 .times. 10.sup.5 After
10 times of 1.6 .times. 10.sup.4 5.0 .times. 10.sup.2 96.9 washing
After 20 times of 1.6 .times. 10.sup.4 <1.0 .times. 10.sup.2
99.4 washing After 30 times of 1.6 .times. 10.sup.4 1.0 .times.
10.sup.3 94.0 washing
[0044] As is clear from Tables 4, 5, and 6, even after repeated
washing, antibacterial activity of the laminated yarn did not
decline, and moreover it turned out that impurity was decreased as
the washing was repeated thereby improve antibacterial
activity.
[0045] (4) Chlorine Bleaching Agent Resistance Examination
[0046] About 10 g of laminated yarn was bundled and a change of
color was observed after predetermined number of times of bleaching
was carried out. In addition, as bleaching liquor, a liquid in
which 12 ml of kitchen bleaching agent was added to 300 ml of
distilled water was used, and in order to evaluate difference by
temperature, examination temperature was varied to conduct
experiment. Results are shown in table 7.
7TABLE 7 Bleaching condition/ number of repetitions 1 2 7 Bleaching
test Change not Change not Change not (30.degree. C. .times. 30
minutes) observed observed observed Bleaching test Change not
Change not Change not (50.degree. C. .times. 30 minutes) observed
observed observed
[0047] As is clear from Table 7, even if the bundled laminated
yarns were bleached, in particular, even if bleached under severe
conditions of 50.degree. C. and 30 minutes, it was confirmed that
the laminated yarns did not blackened.
[0048] (5) Prevention of Temperature Rising Examination
[0049] A piece of T-shirt was sawn from a plain knit fabric in
which the laminated yarn was knit at intervals of 5 mm, and the
T-shirt concerned was heated with an infrared lamp from a position
about 20 cm above to evaluate a surface and inside portion of the
fabric for temperature variation. Results are shown in a graph of
FIG. 2. In addition, a T-shirt that did not include the laminated
yarn was used as experimental control.
[0050] As is clear from FIG. 2, even if the laminated yarn was
woven in, prevention of temperature rising did not fall, and it
turned out that a same level of temperature rise was shown as in
the experimental control.
[0051] (6) Insulation of Heat Examination
[0052] A core yarn with cotton yarn count of No. 30 single in which
the laminated yarn as core was covered with cotton staple fiber was
manufactured, and a coat cloth was manufactured in which 20 (A), 12
(B), and 7 (C) per 1 inch of the cored yarn, respectively, was
included as warp yarn or weft yarn. And coat cloths (A), (B), and
(C), and a coat cloth that did not include the laminated yarn
(blank) were irradiated by a light from a front side of the cloths
to measure a difference of temperature between front and back side
of the cloths. A change by passage of time of difference of
temperature in front and back side of the cloth are shown in Table
8, and measured temperature of each of the cloths after 5-minute
irradiation are shown in Table 9.
8 TABLE 8 Irradiation Period (min) Sample name 0 1 2 3 4 5 (A) 0.2
3.2 5.9 7.9 9.6 11.1 (B) 0.2 3.1 5.9 7.7 9.3 10.5 (C) 0.2 2.8 5.5
7.3 9.1 9.9 Blank 0.3 2.8 5.4 7.2 8.3 9.1 (.degree. C.)
[0053]
9TABLE 9 Irradiation period (min) Sample name 5 (A) Front 44.0 side
Back 32.8 side (B) Front 43.6 side Back 35.0 side (C) Front 43.3
side Back 35.2 side Blank Front 43.7 side Back 35.3 side (.degree.
C.)
[0054] In Tables 8 and 9, when a difference of temperatures on
front side of the cloth and on backside after 5 minutes of light
irradiation was compared, it turned out that a difference of
temperature in (A) including 20 of core yarns per 1 inch was larger
about 2 to 3.degree. C. compared with the blank. Therefore it
turned out that insulation of heat was improved when core yarn
including the laminated yarn was woven in.
[0055] (7) Antistatic Property Examination
[0056] A T-shirt manufactured in (5) was used and antistatic
functional examination was conducted according a method in JIS
1094-5 publication. Measurement conditions are temperature of
20.degree. C., and 20% of humidity. Results are shown in Table 10.
In addition, a T-shirt that did not include the laminated yarn was
used as experimental control.
10TABLE 10 Half value Charged amount period Triboelectrification
measurement of measurement voltage triboelectrifications Sample
(SEC) measurement (V) (.mu.C/m.sup.2) T-shirt 46.5 50 or less 0.19
including the laminated yarn T-shirt 12.0 1320 1.57 without the
laminated yarn
[0057] As is shown in Table 10, charge and voltage of static
electricity accumulated in the T-shirt fell, showing that
antistatic function was improving by the laminated yarn woven
therein.
[0058] Experiment 2
[0059] (8) Manufacture of Twisted Yarn
[0060] A metal layer with a thickness of 50 nm made of solid silver
(99.99% of purity, manufactured by Mitsubishi Materials
Corporation) was formed by a vacuum deposition technology on a
polyester film (manufactured by Toray Corporation) having a
thickness of 9 microns. The synthetic resin films obtained were
adhered together with a polyester system adhesive (manufactured by
SUMITOMO 3M Limited) so that the vapor deposition membranes might
be placed inside, and was cut out by the width of 150 microns to
manufacturer a laminated yarn. And two polyester yarns of 30
deniers/5 filament were twisted by right and left opposite
direction around the laminated yarn, and a twisted yarn was
manufactured.
[0061] (9) Manufacture of a Cloth for Gentleman Suit Lining
Cloth
[0062] Warp yarns warped so that polyester yarn (manufactured by
Toray Corporation) of 50 deniers/10 filaments might be 150 ends per
1 inch, and weft yarns in which 30 ends of polyester yarns
(manufactured by Toray Corporation) of 75 deniers/72 filaments, and
the twisted yarn manufactured in (8) were combined so that it may
be 70 ends per 1 inch in total were woven to obtain a twill cloth.
The twill cloth after scoured was dyed in blue by disperse dyes to
manufacturer a cloth for gentleman suit lining cloth. In addition,
the twisted yarn in the cloth for gentleman suit lining cloth
showed a blue metallic color, and space of the twisted yarns was
about 10 mm.
[0063] (10) Antistatic Property Examination
[0064] An experimental control using a polyester yarn (manufactured
by Toray Corporation) of 75 deniers/72 filaments instead of the
twisted yarn was manufactured by a same method as in (9). The cloth
was rubbed for 1 minute with a nylon and acrylic cloth under an
environment of temperature of 20.degree. C., and 20% of humidity,
and a charged voltage at a moment when friction was stopped was
measured, and an electrostatic resistance examination was
conducted. Accordingly, a charged voltage in a cloth for gentleman
suit lining cloth manufactured in (9) showed 300 volts or less in
contrast to the charged voltage of the experimental control
exceeding 4000 volts.
[0065] Experiment 3
[0066] (11) Manufacture of a Cloth for Gentleman Suit Lining
Cloth
[0067] Except that the twisted yarn manufactured in (8) was 10 ends
in an equal pitch in 1 inch, and that a cloth was dyed in black by
disperse dyes, a cloth for gentleman suit lining cloth was
manufactured in a same method as in (9). In addition, the twisted
yarn in the cloth for gentleman suit lining cloth showed a black
metallic color, and space of the twisted yarns was about 2.5
mm.
[0068] (12) Insulation of Heat Examination
[0069] An experimental control in which a polyester yarn
(manufactured by Toray Corporation) of 75 deniers/72 filaments was
used instead of the twisted yarn was manufactured by a same method
as in (11), and insulation of heat examination was conducted
according to following procedures of (a) to (d). Firstly, (a)
lights (two National lamps: PRF-500 wWB were used) were installed
in one side; (b) the experimental control and the cloth for
gentleman suit lining cloth manufactured in (11) were placed
combined with a brown clothing fabric forming two sheet doubling in
a shape of a screen, respectively, in a place making a right angle
in a progress direction of the light distant from the light 30 cm;
(c) irradiated for 5 minutes by the light; (d) a difference of
temperatures in a light side and an opposite side of the
experimental control and the cloth for gentleman suit lining cloth
manufactured in (11) was measured.
[0070] As a result, a temperature in the light side of the
experimental control showed 44.8.degree. C., and a temperature in
opposite side showed 29.1.degree. C. And a temperature in the light
side of the cloth for gentleman suit lining cloth manufactured in
(11) showed 46.1.degree. C., and a temperature in opposite side of
the light showed 27.2.degree. C. Accordingly, compared with the
experimental control, the cloth for gentleman suit lining cloth
manufactured in (11) turned out to block 1.3.degree. C. in the
light side (heat source side), and 1.9.degree. C. of heat in the
opposite side.
[0071] Experiment 4
[0072] (13) Manufacture of Cloth for Coats
[0073] A laminated yarn manufactured in (1) was covered by a weft
fiber and a core yarn having No. 30 cotton count was manufactured.
Next, a weft yarn in which No. 30 count cotton yarn 5 ends might be
combined to the above-described core yarn 1 end was woven at a same
pitch to a warp yarn warped so that No. 30 count weft yarn might be
150 ends per 1 inch to give 80 ends per 1 inch to obtain a
gabardine cloth. The cloth was scoured and dyed in black with
disperse dyes to manufacture a cloth for coats.
[0074] (14) Insulation of Heat Examination
[0075] A cloth for coats in which a same method as in (13) was
repeated and manufactured except that only No. 30 count cotton yarn
having been used as weft yarn was used as an experimental control,
and insulation of heat examination was conducted by the same method
as in (12).
[0076] As a result, a temperature in the light side of the
experimental control showed 40.5.degree. C., and a temperature in
the opposite side to the light showed 28.2.degree. C. Moreover,
temperature in the light side of the cloth for gentleman suit
lining cloth manufactured in (13) showed 43.3.degree. C., and
temperature in the opposite side of the side showed 26.degree. C.
Accordingly, compared with the experimental control, the cloth for
coats manufactured in (13) turned out to block 2.8.degree. C. in
the light side (heat source side), and 2.2.degree. C. of heat in
the opposite side.
[0077] Experiment 5
[0078] (15) Manufacture of a Shirt
[0079] A weft yarn in which No. 40 count cotton yarn 4 ends might
be combined to the core yarn used in (13) 1 end was woven to a warp
yarn warped so that No. 40 count cotton yarn might be 130 ends per
1 inch to obtain a broadcloth with 85 ends per 1 inch. The cloth
was bleached and a shirt was manufactured.
[0080] (16) Insulation of Heat Examination
[0081] A same person wore a shirt manufactured in (15) and a shirt
of an experimental control, after walk exercising for 5 minutes in
18.degree. C. of atmospheric temperature, and 50% environment of
humidity. Stationary state was maintained for 3 minutes in wearing
state, and a difference in skin surface temperature was measured
with a thermograph. In addition, an experimental control shirt was
manufactured in a same method as in (15) except for No. 40 count
cotton yarn having been used instead of the core yarn.
[0082] Accordingly, as compared with the experimental control, it
turned out that the shirt manufactured by (15) was excellent by
3.2.degree. C. in keeping warm property.
[0083] Experiment 6
[0084] (17) Manufacture of Cloth for Lace Curtain
[0085] Polyester yarn of 150 deniers 90 ends per 1 inch and the
twisted yarn (same as the yarn manufactured in (8)) 10 ends
inserted equally between the polyester yarns were used as warp yarn
to be knitted by a raschel machine that was a kind of warp knitting
machine. The fabric was scoured to manufacture a cloth for lace
curtain.
[0086] (18) Insulation of Heat Examination
[0087] Except for having used a standard white cloth (cotton
calico) instead of a brown clothing fabric, a same method as in
(12) was repeated and insulation of heat examination was conducted.
In addition, a cloth for lace curtain manufactured by a same method
as in (17), except having used a yarn of 150 deniers of polyester
instead of the twisted yarn, was used as an experimental
control.
[0088] As a result, a temperature in the light side of the
experimental control showed 41.7.degree. C., and a temperature in
opposite side of the light showed 25.8.degree. C. And a temperature
in the light side of the cloth for lace curtain manufactured in
(17) showed 43.8.degree. C., and a temperature in opposite side of
the light showed 26.3.degree. C. Accordingly, it turned out that
the cloth for lace curtain manufactured in (17) gave 2.1.degree. C.
higher in the light side.
[0089] Thus, a laminated yarn 1 and a cloth including the laminated
yarn 1 are equipped with outstanding aesthetic appreciation
property while they are equipped with outstanding antibacterial
property, washing resistance, prevention of temperature rising,
insulation of heat, antistatic property and the like.
[0090] In addition, the present invention is not limited to the
above-described embodiments and Examples, and various modification
is possible within a range of technical matter indicated in
claims.
[0091] For example, as shown in FIG. 3, a coat layer 23 may be
provided outside of a synthetic resin film 21 that constitutes a
laminated yarn 2. As a material of coat layer 23, barium oxide,
titanium oxide with photo catalytic function, silicon compound and
the like may be mentioned, for example.
[0092] When barium oxide is used for a coat layer 23, X ray
blocking property of a laminated yarn 2 may be increased. For
example, a cloth woven by a laminated yarn 2 in which vapor
deposition membrane 22 is constituted by silver of thickness of 200
nm, and a coat layer with a thickness of 5 to 200 microns made of
barium oxide prepared on a synthetic resin film 21 may be imaged by
X-rays. Textiles woven with 20 to 30 of this laminated yarn 2 per 1
inch as warp and weft yarns, respectively, may block
electromagnetic wave of about 60 db level.
[0093] In the case where titanium oxide is used for coat layer 23,
killed microorganism by an antibacterial metal of a vapor
deposition membrane 22 may be decomposed and detoxified with a work
of active oxygen generated by a photo catalyst (titanium oxide),
and in the case where silicon compound is used for coat layer 23,
keeping warm property of a laminated yarn 2 may be increased.
[0094] Moreover, as shown in FIG. 4, a coat layer 33 made of
pigments, such as titanium oxide, may be provided between a vapor
deposition membrane 32 and a synthetic resin film 31. Thereby, a
metal color of antibacterial metal may be disappeared, and use in
textiles such as white robe in which yarns of metal color cannot be
used becomes possible.
[0095] And as shown in FIG. 5, a coat layer 43 made of barium oxide
and the like may be provided on a vapor deposition membrane 42.
Thereby, even if the amount of antibacterial metal used
constituting the vapor deposition membrane 42 may be reduced, a
same level of insulation of electromagnetic waves may be obtained,
and production cost may be lowered when an antibacterial metal is a
silver.
[0096] Furthermore, a laminated yarn may be twisted with wooly
nylon and the like to obtain a twisted yarn, or staple fiber made
of natural fiber, such as cotton, or synthetic fibers, such as
polyester, is twisted around a laminated yarn to obtain a core
yarn. Thereby dye affinity and a usage range of the laminated yarn
may be extended while being able to improve a touch to skin of the
laminated yarn.
[0097] In addition, the laminated yarn can also be used as a
material of brushes for toilets and the like, or for mops for
cleaning besides cloth product by increasing thickness of a
synthetic resin film. A cloth with a laminated yarn included
therein may be adhered on a concrete wall, ceiling, floor, and the
like, or may be applied inside, and may also be used as
electromagnetic wave removal materials.
[0098] Industrial Applicability
[0099] A laminated yarn of the present invention is a yarn having a
sandwiched structure in which both sides of a vapor deposition
membrane made of an antibacterial metal are sandwiched with
synthetic resin films, thereby it had a beautiful appearance and
high antibacterial property, an even after repeated washing
antibacterial activity was not deceased, and the yarn showed high
prevention of temperature rising, insulation of heat, antistatic
property, insulation of electromagnetic wave, and flexibility.
[0100] Moreover, decomposition function by a photocatalyst, keeping
warm function, and insulation of electromagnetic wave could also be
provided by preparing a coat layer outside of a synthetic resin
film.
[0101] Moreover, by preparing a coat layer made of pigments, such
as titanium oxide, between a vapor deposition membrane and a
synthetic resin film, metal color of antibacterial metal was
decreased and coloring in various color became possible.
[0102] Furthermore, by preparing a coat layer on a vapor deposition
membrane, an amount of antibacterial metals used, such as silver
used as a vapor deposition membrane, could be reduced, and the
laminated yarn could also be manufactured more cheaply.
[0103] In addition, a dye affinity was increased and a usage range
of a laminated yarn was extended while being able to improve a
touch to skin of a laminated yarn by twisting cotton staple fiber
and the like around a laminated yarn to obtain a core yarn.
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