JPS59207182A - Production of extensible padding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing stretchable padding using latent crimpable fibers.

In general, a known method for producing padded cotton is to form a web of fibers with a large number of crimps using a card, etc., and then bond the fibers after undergoing treatments such as needling. However, in this manufacturing method, the fibers are adhesively fixed with other fibers at the crimping part, so the degree of freedom of the fibers is reduced.
A padded cotton material with sufficient elasticity was not obtained.

Furthermore, when fibers with a higher number of crimps are used, the carding properties are significantly deteriorated due to the entanglement of the fibers, and there are production problems in that the web becomes extremely non-uniform. Therefore, the padded cotton fabricated using this manufacturing method could be used for quilting, which has less elasticity, but was unsuitable for use in clothing that involves intense movement of the human body, such as sportswear. . Therefore, as a method of imparting elasticity to padded cotton, a method of inserting elastic threads made of polyurethane elastomer or the like into the fiber web has been proposed.
ing.

However, this manufacturing method requires additional equipment and processes for inserting the elastic threads, and the resulting stuffed cotton does not have sufficient elasticity in the areas where the elastic threads are not present, causing wrinkles and wrinkles. It had the disadvantage of causing twitching.

The present invention was carried out in order to eliminate the drawbacks of the conventional technology.
An object of the present invention is to provide a manufacturing method for obtaining padded cotton having uniform and good elasticity.

The present invention involves forming a web containing latent crimping fibers, spraying the web I/C adhesive, drying the web at a temperature that does not cause crimping of the optional crimping fibers, and then Loss density 1i0.005, characterized in that the web is caused to shrink by causing the latent crimpable fibers to shrink.
The present invention relates to a method for producing stretchable padded cotton of ~0.05 g/cd.

The latent crimpable fibers used in the present invention include side-by-side composite fibers made of two-component polymers with different thermal behaviors, and fibers that are heat-set in a highly twisted state and then opened at a lower temperature. There are thermo-plastic fibers that have been given a thermal history by the process, and fibers that have latent crimp properties by disrupting the molecular arrangement on one side of the fiber, such as edge-talimped yarns. . The elasticity of the cotton padding is brought about by the crimping/pulling of the fibers that make up the cotton padding, so it is thought that the more crimp the fibers are, the better the stretchability can be obtained. Therefore, it is desirable that the latent crimpable fibers have a significantly increased number of crimp after the occurrence of crimp.

In the present invention, the web is formed by a card method or the like. The fibers constituting the web preferably contain at least 30% by weight of latent crimpable fibers, preferably 50% by weight or more.

30% by weight of latent crimpable f6R fibers mixed in the web
If no drops are left, it will not be possible to obtain padded cotton with sufficient elasticity. The greater the amount of latent crimp fibers mixed into the web, the better the elasticity of the resulting filler cotton, so in order to obtain the best stretchability, it is necessary to form a web with only latent crimp fibers. Just form it.

The fibers to be mixed with latent crimpable fibers and VC in the web are preferably fibers with a large number of crimp as long as they do not impede the carding property or the uniformity of the web.

Although it is possible to use fibers with a small number of crimps, they are not preferable because they reduce the elasticity of the resulting padded cotton. In addition,
Since latent crimp fibers are used, carding properties are good and a uniform web can be obtained with good productivity. After the web is formed, treatments such as needling may be performed if necessary.

Next, an adhesive such as an acrylic resin emulsion is applied to the web using a spray.

In order to give the padded cotton elasticity, elasticity in the thickness direction, and lofty properties, the bonding points must be distributed three-dimensionally, and adhesion using a spray method is required. In addition to the spray method, there is also a method using thermally adhesive fibers in which bonding points are distributed three-dimensionally. sexual fibers regenerate,
Although thermally bondable fibers can be used as an auxiliary bonding means in a bonding method in which adhesive is sprayed, it is not desirable to use thermally bondable fibers as the main bonding method.

After applying the adhesive by spraying, the web is dried to fix the fibers in contact with each other.

In this process, if the latent crimp fibers are caused to shrink due to drying heat, the web will shrink unevenly, resulting in dimensional deformation and poor elasticity. Therefore, drying must be carried out at a temperature that does not cause crimping of the latent crimp fibers.

After drying, the web is shrunk by crimping the crimpable fibers containing ``C'' using means such as heating or hot water treatment. In order to obtain a padded cotton pad with good elasticity, it is desirable to apply as little tension to the web as possible during contraction.

This is because when tension is applied to the web, the fibers are fixed in an elongated state in the direction of the tension and do not undergo sufficient contraction, which significantly reduces the elasticity of the resulting cotton filling.

In addition, the apparent density of the obtained filling cotton is preferably 0.005 to 0.05 f/cm from the relationship between heat retention and strength.
Special & Co preferred u o, o i ~o, oa y/C
IA Ka x I.

As described above, according to the present invention, since latent crimp fibers are used, web formation with cards etc. can be performed with high productivity, and since a spray method is used as a fiber adhesion method, bulkiness and elasticity in the thickness direction are improved. A cotton pad with a certain amount of milk is obtained. Furthermore,
In the present invention, after the fibers are laminated, the latent crimp fibers develop crimp and shrink the web, so a large number of free crimp that are not fixed with adhesive are generated in the web.
As a result, padded cotton having uniform and good elasticity can be produced.

The padded cotton obtained by the production method of the present invention is J-, 6
Q: Not only does it have good elasticity as shown in (7), but it also has good washability because it has been treated with a spray adhesive. In addition, it can also be used for various types of heat insulating materials such as futon 9 gloves.

Below is the implementation! The present invention will be explained in more detail with reference to I, but the present invention is not limited to this invention. In the examples, the residual strain rate is used as a value indicating elasticity, but this is measured by a test method based on JiSL-1080, and the test piece is stretched by 40% and returned to its original position The residual elongation after returning to the shade was repeated 10 times was divided by the original length of the test piece, and the value was expressed as a percentage.

Example 1 50% by weight of polyester fiber A11I having a thickness of 3 denier, a length of 51 #Ii, and a number of crimps of 17 threads/inch, which was given latent crimpability by the edge ring method.

Conjugate type highly crimped polyester fiber with a thickness of 3 denier and a length of 51 ytlπ2 and a number of curvatures of 17 threads/inch.
0% by weight, the basis weight was 38 using a crosslay card.
A web of yΔπ was formed.

Next, a polyacrylic acid ester emulsion was applied to both sides of this web by spraying and dried in a band dryer at 100° C. or lower.

The weight of the web at this time is 44 g/n? Met. After drying, using a dryer heated to 170° C., the latent crimpable fibers were crimped with almost no tension applied to the web, thereby causing the web to shrink. The number of crimps of the latent crimped fibers after crimping is 34 peaks/inch, and the shrinkage rate of the web is 17% in the pitch direction and 23% in the direction of the web.
Met.

Obtained 7 Also, the cotton padding has a basis weight of 70 y/yd and a thickness of 1
ytrts, apparent density tdO, 01flAi). In addition, the residual strain rate, which indicates the elasticity of the padded cotton, was 2.5% in the longitudinal direction of the padded cotton and 1.5% in the width direction, indicating very good stretchability. Furthermore, even when dry-cleaned, the residual strain of the filling cotton was 3.5% in the longitudinal direction and 2.0% in the width direction, maintaining good elasticity and dry-cleaning resistance.

・Comparative example One roll silk polyester fiber of conduit gate type with thickness 8 denier, length 51 mm, number of curls 17 threads/inch 10
Using 0% by weight, crosslay card VCj date'a
A web of 8'fl/nl was formed.

Next, both sides of this web were prepared in the same manner as in Example 1.
A polyacrylic acid emulsion was applied by spraying and dried with a dryer at 150°C.

The weight of the web at this time was 44 doors.

The residual strain rate of the padded cotton obtained in this way cannot be measured in the longitudinal direction because it cannot withstand repeated elongation of 40% and breaks, and it is extremely high at 15% in the ilG'A direction. It showed that the elasticity was poor.

・Example 2 A polyester component with a melting point of 255°C and a shrinkage start temperature of 230°C, consisting of a polyester component with a single point of 210°C and a shrinkage start temperature of 160'c, with a thickness of 4 denier and a length of 517cm.
Using 100% by weight side-by-side type composite fiber of 1118, fabric weight is 55 f7 using additional crosslay card.
h? , thickness lQA#IW (7) web was formed. Next, this web was subjected to needling treatment using a fiber rocker to obtain a felt-like web with a thickness of 4 mm. A polyacrylic acid ester emulsion was sprayed onto both sides of this felt web and dried at 120'C. The basis weight of the web at this time was 68 flβ. After drying, the side-by-side composite fibers having latent crimp properties were crimped using a heat shrink machine heated to 170°C.
The web was then subjected to shrinkage treatment. The shrinkage rate of the web was 22% in the longitudinal direction of the web and 38% in the width direction.

The fabric weight of the cotton padding obtained is l 80 Inn? , The thickness was 6 doors, and the F density was 0.02217 cm.

In addition, the residual strain rate is 1.5%9 in the longitudinal direction of the filled cotton.
It was 1.0% in the width direction, and showed better elasticity than Example 1 because the web was formed only from latent crimpable fibers. The elasticity was also improved by the varnishing and needling treatments, and it was possible to produce padded cotton suitable for use in sportswear and the like.

Patent applicant Nippon Vilene Co., Ltd. Procedural amendment (spontaneous) June 7, 1980 Mr. Kazuo Wakasugi, Commissioner of the Patent Office ■, Indication of case Patent application No. 57650 No. 57650 of 1983 2, Invention name elasticity Manufacturing method for padded cotton 3, relationship with the amendment case
Column 5 of Detailed Explanation of the Invention of Trace, Contents of Amendment (A) Page 3 @ l 4? The statement ``There are no 3 intervalves in the 1 @ cord of the T eye'' has been corrected to ``The curling is not fully developed.''

(b) Insert "completely" after "reduce volume 1" on page 7, line 10.

(C) On page 7, line 13, the phrase "is not expressed" is corrected to "is not fully expressed."

) Insert the following sentence after "Must do." on page 7, line 13.

"Even if latent crimp occurs partially before heat treatment, it is fine as long as it does not impair elasticity." (e) On page 8, lines 7 and 8, line 1 Insert the following text.

[Although it is preferable that the above-mentioned drying of the web and development of crimping of the latent crimping fibers are carried out in separate dryers, it is also possible to develop the crimping of the latently crimped fibers after drying the web. A single dryer may be used if it can do so. 2. Claims Forming a web carrying latent crimpable fibers and contacting the web with 7
After spraying the Jf agent and drying the latent crimp nib,
By fully crimping the latent crimpable fibers, the web is caused to shrink! Characteristic apparent density: 0.
005~o, 05 f/'ctt4 elastic padded cotton manufacturing method.

Claims (1)

[Claims] After forming a web containing latently crimped fibers, spraying the web with an adhesive, and drying the web at a temperature that does not cause crimping of the latently crimped fibers, winding the latently crimped fibers. An apparent density of 0.005 to 0.059/c, characterized in that the web is caused to shrink by causing shrinkage.
yA's method for producing stretchable padded cotton.