JPS60146004A - Extensible padding material - 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 batting material with excellent elasticity and heat retention, which is made by laminating and needling a polyurethane elastic fiber nonwoven fabric and a web made of inelastic fibers.

Conventionally, various materials have been used as batting structures, but most of these have low stretch groups and low stretch recovery rates. In recent years, batting made by sandwiching polyester cotton with batting impregnated with urethane resin or nonwoven fabric with highly crimped yarn has been announced, but even with these battings, the stretch height and stretch recovery end are insufficient. In particular, there was no sufficient filling material for use in fields such as sports clothing and work clothing.

The present inventors previously developed a batting material with excellent elasticity and heat retention by laminating and bonding a polyurethane elastic fiber nonwoven fabric and a web made of inelastic fibers, and patent application filed in 1982-
No. 111429, but as a result of further research, the present invention was completed.

An object of the present invention is to provide a filling material with excellent elastic properties and heat retention properties, and in particular to provide a filling material suitable for fields that require high elastic properties such as sports clothing and work clothing. It is in.

A polyurethane elastic fiber nonwoven fabric in which polyurethane elastic filaments melt spun according to the present invention are laminated without being substantially bundled, and the contact points of the laminated filaments are bonded to the filaments themselves; and inelastic fibers. It is an elastic batting material made by laminating more than one layer of web and needling.

As the polyurethane elastic body constituting the nonwoven fabric used in the present invention, a known melt-spuntable thermoplastic polyurethane elastic body is applied. Such polyurethane elastomers usually contain a low melting point polyol with a molecular weight of 500 to 6,000, such as dihydroxypolyether, dihydroxypolyester, dihydroxypolycarbonate, dihydroxypolyester amide, etc., and an organic diisocyanate with a molecular weight of less than 500, such as p, p'- Diphenylmethane diisocyanate, tolylene diisocyanate, inphorone diisocyanate, hydrogen 1-hydiphenylmethane diisocyanate, xylylene diisocyanate, 2,6-diincyanate methyl caproate, hexamethylene diisocyanate, etc., and chain elongation of molecules M2O3 to F. Polymers obtained by reaction with agents such as glycols, amino alcohols or triols. Among these polymers, particularly good are polytetramethylene glycol, or polyurethane using polyε-caprolactone or polybutylene adipate as the polyol.

When polyethylene glycol is used as a polyol, it improves hydrophilicity and is therefore used for special purposes. Further, as the organic diisocyanate, p, p/-diphenylmethane diincyanate is preferable. Further, as the chain extender, 1,4-bishydroxyethoxybenzene and 1,4-butanediol are suitable.

As mentioned above, some polyurethane elastomers are synthesized from a polyol, an organic diisocyanate, and a chain extender, but the polyurethane elastomer preferably used in the present invention is one in which the polyol component is upwind of the total weight by 65%. , particularly preferred is on a 68-weight board. If the content of the polyol component is low, the resulting nonwoven fabric will have low elongation and elongation recovery. These polyurethane elastomers may contain plasticizers, pigments, stabilizers, and the like.

The nonwoven fabric used in the present invention is a fabric in which polyurethane elastic filaments are spread and laminated over substantially the entire length of the yarn without convergence. If the monofilaments are joined in a bundled state without being opened, the flexibility of the nonwoven fabric will be significantly impaired. The diameter of this monofilament is usually 50 microns or less on average, preferably 2 microns on average.
It is preferably 5 microns or less, particularly preferably 20 microns or less. The diameter of the monofilament may vary widely, but it is preferably 50 microns or less at most. As the fiber diameter of the monofilament increases, the nonwoven fabric becomes rough and stiff.

The cross-sectional shape of the urethane elastic fibers constituting the nonwoven fabric used in the present invention can be various shapes such as circular, bounded, hollow, etc. It is preferable to have a circular cross section.

The nonwoven fabric used in the present invention is Boriu 1/Yu/! 1ilI
Polymer filaments are laminated, and the points of contact between the fibers constituting this laminate are joined by the fibers themselves. Such a bonded state can be achieved by thermally fusing the polyurethane elastic fibers together. Methods using solvents or other adhesives are not preferred because they reduce the air permeability and flexibility of the nonwoven fabric. However, it is permissible to use adhesives in combination without impairing these properties.

One of the important features of the nonwoven fabric used in the present invention is that the nonwoven fabric has extremely low breaking strength and elongation, and has excellent elastic performance. This is due to the performance of the polyurethane elastic tJIl fibers that make up the non-yellow woven fabric, and the elastic performance of conventionally known non-woven fabrics made of inelastic polymers and polyester ether elastomers is inferior. This cannot be obtained with nonwoven fabrics made of polymers (
performance. The elongation at break of the nonwoven fabric used in the present invention is usually 300 modulus or more, preferably 500 modulus or more. The breaking strength varies depending on the thickness of the nonwoven fabric, but is usually at least α4, preferably at least 1.0 Ail/a. The recovery rate when stretched to 100 widths is usually 85 inches or more, preferably 90 inches or more. The strength, elongation, and elongation recovery as rl% of the nonwoven fabric vary depending on the adhesive strength at the melting point between the fibers constituting the nonwoven fabric, but the nonwoven fabric used in the present invention has the above strength, elongation, and elongation recovery rate. This indicates that the bonding at the contact melting point has been sufficiently performed.

The greatest feature of the nonwoven fabric used in the present invention is that it is extremely flexible. Bending resistance of nonwoven fabric (JISL-10
96 (4516' cantilever method), the weight becomes uniform as the basis weight of the nonwoven fabric increases, but the nonwoven fabric used in the present invention has a basis weight of X (g/yy/), and 11 layers are y.
When (C horse), the range of y<0.2X+20 is suitable. This feature is obtained by combining the physical properties of the polyurethane elastic body with the above-mentioned structure of the nonwoven fabric and the small diameter of the constituent fibers. M
While this could not be achieved with O wedges, the inelastic fibers used in the present invention include polyester, polypropylene, and acrylic.

Synthetic fibers such as Naio7, Salt) IS vinyl, or It
d. It is preferable to use natural fibers such as wool or silk alone or in combination.

My father, when two or more types of fibers are mixed, one of them uses one with a higher melting point, and by melting the lower melting point fiber, the web is partially joined, resulting in a material that is superior to vA1 Kusumi. It is even more suitable.

The shape of the inelastic fibers may be circular, irregularly shaped, or hollow, but irregularly shaped or with a mid-wall cross section are preferred from the viewpoint of heat retention.

The filling material of the present invention is made by laminating the above-mentioned polyurethane elastic fiber nonwoven fabric and a web of inelastic fibers and needling them. 1ffi, feed rate, s)
Conditions such as a-drawing speed, needle type, and resistance 2. Depends on the intended use of the batting material.

It can be determined as appropriate in consideration of the thickness and flexibility, and the needling method is not particularly limited. Furthermore, the method of laminating the polyurethane nonwoven fabric and the non-elastic web may be two or three layers, or two or three layers.
The layers may be further laminated.

Furthermore, by heat-treating after needling and melting fibers with a lower melting point than K, it is possible to partially bond the web to a material with excellent durability.

The batting material made by these methods has excellent elasticity, flexibility, and heat retention properties that are not found in conventional books.

The present invention will be explained in detail below with reference to Examples.

Example 1 5548 parts of dehydrated polytetramethylene glycol having a hydroxyl value of 102 (all parts by weight hereinafter refer to parts by weight) and 49 parts of 1,4-bis(β-human α-oxyethoxy)benzene
P,
1,953 parts of p'-cyphenylmethane diincyane) were added and reacted.

When stirring was continued, a powdered polyurethane was obtained in about 30 minutes, which was molded into a civet shape using an extruder and measured at 25°C in dimethylformamide.
A polyurethane elastomer having a CC relative viscosity of 2.50 was obtained.

Using the polyurethane elastic pellets obtained in this way as a raw material, a heavy-duty blow-spinning machine having slits for jetting heated gas on both sides of nozzles with a diameter of 0.8 inches arranged in a row was used, at a melting temperature of 245°C, per nozzle. The polymer was discharged at a rate of 0.5 g/min, and air heated to 0.degree. C. was injected through the slit at a pressure of 5.5 jcl/cd to atomize the polymer. The thin filament was collected on a conveyor consisting of a 30-mesh wire mesh installed on the F side of the nozzle 25 (toward), and was caught between rollers to obtain a nonwoven fabric.

This nonwoven fabric was made up of opened and laminated monofilaments of polyurethane elastic fibers, and the intersection points between the filaments were joined by fusion. The physical properties of this nonwoven fabric were as follows.

Weight: 50 zo/rn' Tensile strength: 0. ．． 511 w/” Elongation at break 539% 100% elongation recovery 92% Bending resistance 21 R41 Filament diameter 15 microns Air permeability 175 ci/+: +J/ 5ec on the other hand 1.5
A web was prepared by mixing denier, 6 denier polyester glass table, and 4 denier polyester stable with a low jJ point in a ratio of 70 parts: 15 parts = 15 parts. The weight of this web is 50g
/ m'.

Between these two web layers, the polyurethane and tan nonwoven fabric described in 6j was struck at a rate of 24 pieces/cA (J-ri speed: 150
Needling was performed at a rate of 5 gm/min to give a thickness of 5 gm. Thereafter, a complete heat treatment was carried out for 12 fJ°C Xj minutes. The batting material 4A'k obtained from this Kj was successful with the performance as shown in the following table. .

Size: 1 2 0 9/m" Tensile strength: 0.54 x 1 Elongation: 300 cm Heat retention: 1.5 When used as ski pants, they had extremely good elasticity, flexibility, and heat retention, and showed extremely little fatigue when repeatedly stretched.

Example 2 Non-stainless/female fibers include 2-denier polyester stable crystal form and 1.5-denier water-absorbing acrylic staple.
Denny 1- was mixed at a ratio of 2:1 to prepare Unilip 1. The basis weight of this web was set to ``Ug/m''. Stroke Me J S with needle density 24/crl
Needling was performed at o times/min to obtain a hem with a thickness of 5u. The resulting batting material had the performance as shown in the table below.

Weight: 170M/m' Tensile strength: Note 3H/1 Elongation: 35D Heat retention: 1.61.0mm When this was used for a jumper, it had extremely good flexibility, elasticity, breathability, water absorption, and heat retention. there were.

Kanehou Gosen Co., Ltd.

Claims (1)

[Scope of Claims] (1) A polyurethane elastic fiber nonwoven fabric in which melt-spun polyurethane elastic filaments are laminated without being substantially bundled, and the contact points of the laminated filaments are bonded to the filaments themselves. and a web made of inelastic fibers are laminated in two or more layers and needled to create a five-layer elastic batting material. (21) The material according to claim 1, wherein the average diameter of the urethane elastic filaments is 30 microns or less. (5) The splitting softness C of the polyurethane elastic fiber nonwoven fabric is expressed by the general formula %. The material according to claim 1, which is in the range represented by Y is bending resistance (m) - x is basis weight (g/m'). (4) 100% elongation of polyurethane elastic fibrous nonwoven fabric The material according to claim 1, in which the length of the recovered fiber is 90 or more. (5) The material according to claim 1, in which the inelastic fiber is polyester, acrylic, nylon, polypropylene, cotton, wool, or silk. Material. (6) Claim 1, in which polyurethane elastic fiber nonwoven fabric is laminated and bonded on both sides of a web made of inelastic fibers.
Materials described in Section 1 or Section 5.