JPS60185582A - Fiber 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 A0 Technical Field of the Invention The present invention relates to fiber-filled cotton having excellent heat retention and elasticity.

B. Conventional technology and its problems Conventional padded cotton uses thick short fibers of 5 to 7 d, as typified by resin cotton, to increase bulk and improve heat retention, but it has a hard texture and is thick. It had the disadvantage of extremely poor maneuverability due to its weight. Furthermore, the new padding cotton that has been developed recently has only been designed to provide heat retention and elasticity, and its performance has not been satisfactory for sports purposes. Also manufacturing M/
There was a disadvantage that it was necessary to newly install C, which resulted in high costs.

C8 OBJECTS OF THE INVENTION The object of the present invention is to eliminate these drawbacks and to be able to manufacture cards at low cost using conventional card M/Cs and heat treatment machines.

Our objective is to provide fiber-filled cotton with excellent heat retention, elasticity, and flexibility.

C1 Structure of the present invention The object of the present invention is to have the following structure, that is, a fiber structure consisting of a padded cotton made of synthetic fibers, in which ultrafine fibers and crimped fibers are joined with a welding component. This is achieved by the characteristic fiber filling.

The fiber insert of the present invention is composed of six fiber components: ultrafine fibers made of synthetic fibers, crimped fibers, and welded components. In other words, the ultra-fine fibers provide heat retention and flexibility, and the crimped fibers provide stretch and elasticity.

The welding component provides ease of handling, shape retention, and durability, and it has comprehensive functions as a fiber insert suitable for sports applications.

The ultrafine fibers used in the present invention are preferably polyamide-based or polyester-based fibers, and highly crimped fibers having a fineness of 1 denier or less.

The fineness of ultrafine fibers includes heat retention, spinnability, and card M/C.
From the viewpoint of processability etc., the single yarn denier is 06 to 1. Od
A range of is suitable. In addition, as ultra-fine fibers, splittable composite fibers made of two components, polyamide and polyester, are divided with a card M/C to obtain ultra-fine fibers, and ultra-fine long fibers are temporarily twisted and then converted into short fibers to have both elasticity and heat retention. It is even more suitable if it is made of stiff fibers.

Next, as the crimped fibers used in the present invention, in order to impart elasticity to the cotton padding, crimped polyester fibers or composite fibers having a degree of shrinkage of 25φ or more after heat treatment or temporarily twisted yarns are cut. Fibers made of polyamide are preferred.

The fineness of the crimped fibers is preferably 2 to 4 deniers from the viewpoint of heat retention and elasticity. In other words, from the standpoint of heat retention, thin denier is preferable, but from the viewpoint of elasticity, thick denier has strong elasticity and excellent elasticity, and 2 to 4 denier is selected considering the balance of these two properties and texture. be done.

Shape retention and durability are imparted by bonding the above-mentioned padded cotton made of ultrafine fibers and crimped fibers with a welding component. Here, as the welding component, a low melting point fiber such as isophthalic acid 30 to 40 wtφ copolyester fiber is employed.

The low melting point fibers are melted into beads by heat treatment at 150° C. or higher and are welded to the contact points between the ultrafine fibers and the crimped fibers. Compared to conventional resin cotton, the filling cotton made from this welding component adheres evenly to the inside, so it has strong adhesion and less separation between the two layers. Also, unlike resin cotton, the surface texture does not become rough or hard.

Next, the blending ratio of each fiber will be described. In the present invention, the mixing ratio of the welding components is 10-30% by weight, preferably 20-25% by weight. That is, when it becomes less than 10%, the adhesive strength decreases and elongation recovery occurs.

Durability such as washability is poor, and if the mixing ratio exceeds 60φ, durability improves, but the texture becomes rough and hard.

This results in a decrease in elasticity.

However, it is important to change the blend ratio of ultrafine fibers and crimped fibers depending on the application, such as adding more ultrafine fibers if the emphasis is on improving heat retention, and increasing the crimped fibers when the emphasis is on improving elasticity. If the blending ratio of ultrafine fibers is 20 to 70% by weight, the blending ratio of crimped fibers will be determined automatically.

In order to obtain a well-balanced padded cotton that satisfies each performance, the blending ratio of each fiber should be 40 to 50 inches of ultrafine fiber and 60 inches of crimped fiber.
The optimal range is 0 to 40%, and the welding component is around 20%.

Next, the method for manufacturing the cotton wadding of the present invention will be described.

sK cotton mixed with ultrafine fibers, crimped fibers, and welded fibers in a fixed ratio
Collect and mix cotton. Next, it is passed through a flat card machine to mix it evenly and spread the fibers to create a web of a certain thickness. At this time, the card VC is elastic because the roller card does not open the ultrafine fibers, creates many neps, and makes it impossible to obtain a uniform web.

It is preferable to use a flat card as it reduces heat retention. After laminating the obtained webs using a cross lato bar to create a sheet with no vertical or horizontal anisotropy,
Subsequently, the sheet is heat-treated to melt the welded fibers and point-bonded at the intersections of the ultrafine fibers and the crimped fibers to obtain the fiber-filled cotton of the present invention.

In order to adjust the thickness of the batting obtained, it is also possible to hot press the sheet with a pair of hot press rollers after the heat treatment machine.

Here, a method for evaluating the elongation rate will be described.

For general fabrics, the elongation rate is usually the elongation rate of the fabric at a stress of 1.8 kg/5 an, but since the breaking strength of padded cotton is low, the elongation stress is 500 g and 75 cm.
It is expressed as the elongation rate over time.

Next, the heat retention evaluation scale "C1o" value of the present invention will be explained.

QIO value Thermal flow resistance value (unit: °C m2) according to the method described in ASTM, D-1518-57T
: hr/kcal), and the difference is 0.18'
It can be obtained by dividing by 0-m2-hr/kcal (thermal flow resistance value equivalent to IC1○). The physical definition of COO value is [1C10 means temperature 21°C2 humidity 50
The section below describes the heat-retaining ability of a fabric that allows a subject resting in a room with an airflow of 10 cm/5 ecO to remain comfortable and maintain an average skin temperature of 36°C. (written by Mitsuru Shoji, published by Koseikan).

In other words, as is clear from the definition, the c'1o value is a characteristic value related to the amount of heat generated by the human body, unlike the thermal flow resistance value, and is suitable for use in clothing and items that are used in contact with the human body. There is. In the case of futons, it is appropriate to use the c1o value because they are used in the form of human body contact. When the human body is at rest, the human body heats up bones at 50 kcal/m2.
hr, so this value is 0.18℃, m2. hr/
When multiplied by kcal (= 1c1o), it becomes 9°C. That is, 1 clo means the ability to thermally insulate a temperature difference of 9° C. without compromising the comfort of the human body.

Therefore, in the case of padded cotton that is required to maintain warmth even when the outside temperature is low, it can be said that a higher COO value is more advantageous.

E1 Effects of the present invention As mentioned above, the fiber-filled cotton of the present invention has a c'lo value of 1.3 to 1.5 times the heat retention compared to conventional resin cotton (constant basis weight, constant thickness), -Stretchability is 40-6 both vertically and horizontally
A fiber-filled cotton material that could sufficiently follow the elongation of the 0% 1-stripe fabric was obtained.

The present invention will be explained below using two examples.

Example polyester fiber cut length: 68 strokes, fineness:
A crimped fiber with a cut length of 51 mm, a fineness of 6 denier, and a crimp degree of 25, consisting of highly crimped ultrafine fibers with a 7 denier and a crimp degree of 20, and a polyester composite fiber, and inphthalic acid 40.
Welded fibers made of wtqb copolymerized polyethylene terephthalate fibers with a cut length of 64 mm and a fineness of 6 denier are blended using a cotton mixing machine, a web is made using a flat card machine, and then the web is laminated using a cross wrapper to form a sheet.2
Next, the cotton was heat-treated at 180°C for 6 minutes using a heat treatment machine to obtain the cotton insert of the present invention. The weight of this padded cotton is 100 g/m2
+The thickness was approximately 10 mm. The degree of crimp of the crimped fibers of the Sunda padded cotton was 63.

The evaluation results for this padded cotton are shown in Table 1.

In Example-1, the blending ratio of ultrafine fibers and crimped fibers was 40% each, and the blending ratio of welded fibers was 20%, making it an excellent insert with a good balance of heat retention and elasticity compared to Examples-2 and 3. Cotton was obtained. Example 2 has a high blending ratio of ultrafine fibers (low blending ratio of crimped fibers), and the heat retention is high, but the elongation rate is low. In Example-6, on the contrary, the mixing ratio of ultrafine fibers was low (the mixing ratio of crimped fibers was high), and the tendency was opposite to that of Example-2. In each case, each function was satisfied and padded cotton excellent for sports use was obtained.

Next, a comparative example outside the scope of the present invention will be described. Comparative Example 1 used 1.5 denier fibers instead of ultrafine fibers and had low heat retention, and Comparative Example 2 had a low degree of crimping of the crimped fibers, resulting in a considerably low elongation rate.

In Comparative Examples 3 and 4, the blend ratio of ultrafine fibers and crimped delicate fibers was changed, and when the ultrafine fibers reached 0%, the heat retention decreased.
When the crimped fiber becomes 04, the elasticity decreases considerably.

In Comparative Examples 5 and 6, the blending ratio of the welded fibers was changed, and when the blending ratio is lower, the heat retention and elongation rate are slightly improved and the texture is softer, but the strength of the filling cotton is lower and the cotton from the second surface is Durability will deteriorate due to cracking and separation between the two layers, and if the mixing ratio is too high, durability will be adversely affected, but the texture will become very rough and hard.
All of them were unsuitable for use as filling cotton.

Patent applicant Higashi Shikikai Co., Ltd. Kyu-Texi Co., Ltd. S

Claims (5)

[Claims] (1) Fiber insert cotton made of synthetic fibers, characterized in that it consists of a fiber structure formed by joining ultrafine fibers and crimped fibers with a welding component. (2) The padded cotton according to claim (1), wherein the ultrafine fibers have a fineness of 1 denier or less. (3) The padded cotton according to claim (1), wherein the crimped fibers have a degree of shrinkage of 25 or more. (4) The cotton pad according to claim (1), which contains 20 to 70 weight percent of ultrafine fibers. (5) The cotton pad according to claim (1), characterized in that the content of the welding component is 10 to 60% by weight.