JPS61225364A - Material for extensible clothing - 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 Field of the Invention The present invention relates to a stretchable clothing material suitable for sports clothing using a polyurethane elastic fiber nonwoven fabric.

BACKGROUND OF THE INVENTION In recent years, the development of materials for sports clothing has been remarkable, especially the development of stretch materials. Typical stretch materials include polyester or nylon filaments that are made into stretch-processed yarn (usually false-twisted yarn), knitted fabrics knitted and dyed with this, and polyurethane elastic yarns (so-called
A woven fabric woven with nine knitted fabrics (spandex) inserted, polyurethane elastic yarns for the back yarn, tricot (so-called two-way tricot knitted with a half structure) using polyurethane elastic yarns for the back yarn, nylon filaments for the fillet yarns, and the above-mentioned stretch-treated yarns. etc. Of course, each of these materials is extremely useful in the field suited to the characteristics it possesses, but they do not possess the following properties.

■ Completely windproof ■ Completely waterproof One way to provide these properties to conventional stretch materials is to laminate the above materials with a stretch film, but this also has the following major drawbacks: There was a problem. In other words, when sewing clothing into clothing, the fabric expands and contracts, so the holes in the seams of the film gradually become larger, which not only tends to damage the appearance, but also requires the seams to be completely sealed in order to be completely waterproof. It is difficult to process the seals due to the stretchability. Even if it could be made, it would have poor durability such as washing resistance, and the part would become hard, degrading the quality of the clothing.

A perfect way to improve this drawback is to make clothing without seams by fusion sewing (welder processing).Not only natural fibers that do not melt, but also synthetic fibers such as polyester nylon, can be welded. Machining is extremely difficult, and even if it were possible to fuse, the part would be extremely rough and brittle, and the strength of the welder part would be low, making it impractical.

Purpose of the Invention The present invention has stretchability suitable for sports clothing, and can be made by a fusion method such as welding, and the fused portion of the resulting clothing is flexible and comfortable to wear. The aim is to provide completely waterproof and windproof materials.

Structure of the Invention The clothing material of the present invention is a polyurethane elastic fiber nonwoven fabric in which molten polyurethane elastic filaments are laminated without being substantially bundled, and the mutual contact points of the laminated filaments are joined by the filaments themselves. and,
A stretch clothing material in which a polyurethane elastic film is integrated with an adhesive.

As the polyurethane elastic body constituting the nonwoven fabric applied to the present invention, a known melt-spuntable thermoplastic polyurethane elastic body is used. Such polyurethane elastomers usually contain a low melting point polyol with a molecular weight of 500 to 6000, such as dihydroxy polyether, dihydroxy polyester, dihydroxy polycarbonate, dihydroxy polyester amide, etc., and an organic diincyanate with a molecular weight of 500 or less, such as p, p. '-Diphenylmethane diisocyanate, tolylene diisocyanate, isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, xylylene diisocyanate, 2,6-
diucyanate methyl caproate, hexamethylene diisocyanate, etc., and a chain extender with a molecular weight of 500 or less,
Examples include polymers obtained by reaction with glycols, amino alcohols or triols. Among these polymers, particularly good are polyurethanes using polytetramethylene glycol, polyε-caprolactone or polybutylene adipate as the polyol. In addition, as organic diisocyanates, p, p'
-diphenylmethane diisocyanate is preferred. Further, as the chain extender, 1,4-bishydroxyethoxybenzene and 1,4-butanediol are suitable.

The polyurethane elastomer is synthesized from a polyol, an organic diisocyanate, and a chain extender as described above, but polyurethane elastomers are preferably used in the present invention when the polyol component accounts for 65'N or more of the total amount. , particularly preferred ti
If the content of the polyol component is low, which is 68% by weight or more, the elongation and elongation elastic modulus of the obtained nonwoven fabric will be low.

These polyurethane elastomers may contain plasticizers, pigments, stabilizers, and the like.

The nonwoven fabric used in the present invention uses the thermoplastic polyurethane elastomer described above as the polymer, but more preferably, a polyisocyanate compound is added to the molten polyurethane elastomer, kneaded, and then discharged from a spinning nozzle. .

The nonwoven fabric used in the present invention is made by laminating polyurethane elastic filaments that are spread out over substantially the entire length of the yarn without being bundled. 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 the monofilament is usually 50 microns or less on average, preferably 30 microns or less on average, and particularly preferably 20 microns or less.

The diameter of the monofilament may vary, but it is preferably 70 microns or less in the maximum case.

As the fiber diameter of the monofilament increases, the nonwoven fabric becomes rough and stiff.

The nonwoven fabric applied to the present invention is one in which polyurethane elastic filaments are laminated, and the contact points between the fibers constituting this laminate are joined by the fibers themselves, preferably at least half of the contact points, particularly preferably at least 30%, Most preferably, it is approximately 100% bonded. Such a bonded heave 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, an adhesive may be used in combination without impairing these properties.

One of the important features of the nonwoven fabric applied to the present invention is that the nonwoven fabric has extremely high breaking strength and elongation, and has excellent elastic performance. This is because it directly reflects the performance of the polyurethane elastic fibers that make up the nonwoven fabric.
Conventionally known non-woven fabrics made of non-elastic polymers and non-woven fabrics made of polymers with poor elastic properties such as polyester ether elastomers have performance that cannot be obtained with polyurethane or synthetic rubber foam sheets. The elongation at break of the nonwoven fabric applied to the present invention is usually 300% or more, preferably 600% or more. The breaking strength varies depending on the thickness of the nonwoven fabric, but is usually 0.4 kg /3, preferably 1.0 kg 7
cm or more. Also, the 100% elongation modulus is usually 86%.
or more, preferably 90% or more. The strength, elongation, and elongation modulus of a nonwoven fabric depend on the adhesive strength of the contact points between the fibers that make up the nonwoven fabric, but the nonwoven fabric used in the present invention exhibits the same strength, elongation, and elongation elasticity. This indicates that the contact points were sufficiently bonded.

The greatest feature of the nonwoven fabric used in the present invention is that it is extremely flexible. The bending resistance of a nonwoven fabric (46 degree cantilever method of UI8L-1096) increases as the age of the nonwoven fabric increases, but the nonwoven fabric used in the present invention has a basis weight of X (f/Wf) and a bending resistance of y. When (w), it is preferable that Y<0.2X+30, and more preferably a range of )'<0.2X+20. 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. This was something that could not be achieved with polyurethane nets or sheets made by molding.

The polyurethane elastic film used in the present invention can be easily obtained by melt-extrusion (molding with a T-die) method, dry film forming method, or wet film forming method, but the resulting material has good elasticity and flexibility and is practical. In order to have a high strength, it is preferable that the thickness of the film be relatively thin, 5 μm or more and 30 μm or less, so it is preferable to manufacture the film by a dry film forming method or a wet film forming method.

Dry film produced by the dry film forming method is produced by applying a polyurethane elastomer dissolved in a solvent onto release paper using a knife doctor, etc., and then drying it, and the resulting material has good elasticity and flexibility. To ensure this, the 100% modulus of the polyurethane elastic body used is: L lath is 40 to 9/ctA or more and 100 #g/cd or less, and the tensile strength is 450 #/d.
You can use any of the above.

Various types of polyurethane elastomers are sold by polyurethane elastomer manufacturers, and elastomers with the required numerical values can be easily obtained.

Wet film is coated on nylon taffeta or polyester tack, which has been treated with silicone to improve releasability, and is coated in the same way as dry film, then immersed in water to solidify the polyurethane into a film (so-called wet regeneration). can get. As mentioned above, the wet film has low mechanical strength due to its porous nature, but is effective in imparting moisture permeability to the material of the present invention. Various types of polyurethane elastomers for wet film are commercially available, and it is preferable to use one with 100% 70% strength and the same tensile strength as for dry film.
Such elastic bodies are easily available.

The adhesive (3) for integrating the polyurethane elastic fiber non-woven fabric (1) of the present invention and the polyurethane film (2) shown in FIGS. 1 and 2 is an adhesive for dry synthetic leather, especially a two-part adhesive. It is preferable to use a type of thermosetting urethane elastomer. Many types of such adhesives are commercially available, but in order not to impair the stretchability and flexibility of the resulting material, those with relatively low 100% modinilas, usually 20 #/d or more and 60 kq/aA or less, are used.

Since the nonwoven fabric and film to be integrated are both made of polyurethane elastic material, integration using adhesive is extremely easy.
When the amount of adhesive used is between 51 f/d and 40 f/d, preferably between LOf/d and 25 f/d, a material with sufficient adhesion strength and flexibility can be obtained.

Another major feature of the material of the present invention is that it is lightweight despite its polynymous feel.

That is, if only a polyurethane elastic film is used, it will naturally be thick and heavy in order to provide a polyurethane feel suitable for clothing.However, in the case of the present invention, a polyurethane elastic film and a polyurethane elastic fiber nonwoven fabric are combined. Therefore, it has a rich sense of volume (thickness).

From this point of view, the thickness of the polyurethane elastic film may be thin, but from the viewpoint of the film's abrasion strength and resistance to snagging, it is recommended that the thickness be at least 5 μm, preferably at least 7 μm, and from the viewpoint of weight reduction and flexibility. If you use a film with a width of 30μ or less, you can easily take advantage of the features of this material.

The material of the present invention can be used for windbreakers, ski jackets, yacht parkas, leotards, etc. In this case, if it is provided with moisture permeability, it will be more comfortable and less prone to stuffiness. In this case, the moisture permeability is 15001711.24 hours or more, preferably 2000 f/m', and it is difficult to get stuffy if you stay for 24 hours or more. (Yujyo method JI820208 method measurement temperature and humidity 40
90% °C, H0 moisture absorption for 4 hours) Methods for imparting moisture permeability to the material of the present invention include the use of a dry film and a wet film as described above. The former method is as disclosed in Japanese Patent Application Laid-Open No. 59-58786.

That is, a method in which N-carboxyamino acid anhydride such as glutamic acid-r-methyl ester-N-carboxylic acid anhydride is addition-polymerized to polyurethane has a 6D amino acid modification rate of 2 to 20.
It is preferable to use the polyurethane as a film with a thickness of 5 to 20 μm.

From the above description, in the case of the material of the present invention, since the polyurethane elastic film and the nonwoven fabric are integrated, fused sewing (
It is easy to understand that it is extremely easy to apply coating (such as Kuelder processing). When making clothing, the film side is often used as the front side.The polyurethane elastic non-woven fabric on the back has a high coefficient of male friction, which can make it difficult to wear, but it is possible to emboss the polyurethane elastic non-woven fabric into dots. It is best to use one with a textured surface.

Effects As is clear from the above description, the collected wood of the present invention is a novel material that has not existed before, and I think it has been understood that it has an extremely useful performance of 61%, but to summarize it once again, it is as follows.

1. Completely waterproof with excellent stretch, flexibility, and lightweight.
Made of completely windproof material.

2. Can be fused and sewn, and since the main component is polyurethane elastic, the fused part does not become rough and hard and feels good to the touch.

Example 1 Polybutylene adipate with molecule fil 600, p.

p'-diphenylmethane diisocyanate and 1°4
- A thermoplastic polyurethane elastomer synthesized from buta/diol is melted, and 1% by weight of a polyisocyanate compound synthesized from polybutylene adipate with a molecular weight of 1000 and twice the mole of pm\-') phenylmethane diisocyanate is added, After kneading, the nonwoven fabric was discharged from the nozzle of a melt blow spinning device and heat-treated at 100°C for 8 hours after spinning to obtain a nonwoven fabric whose performance was as shown in Table 1.

In all cases shown in Table 1, monofilaments of polyurethane elastic fibers were opened and laminated, and the intertwining points between the filaments were fused to each other. Table 2 shows the physical properties of various elastic materials of the present invention obtained by integrating a dry polyurethane film with the polyurethane elastic nonwoven fabric shown in Table 1 in the following manner.

Urethane elastic body manufactured by Dainippon Ink and Chemicals Co., Ltd., Crisbon 6666HV (100% Mogelus 50 to 9/d
, tensile strength 600#/d) was diluted with DMF to reduce the viscosity to 30
00 to 6000 C1)8, coated on release paper with a knife coater and dried at 120°C to produce films of various thicknesses.

Next, we used a two-component polyurethane, Crisbon 407G (100% Moschellas 26#/manufactured by Dainippon Ink and Chemicals Co., Ltd.).
d) Mix 100 parts of the cross-linking agent and 15 parts of the company's Crisbon
017d and dried at 100°C to obtain an adhesive. Next, the polyurethane elastic fiber nonwoven fabric was superimposed on the adhesive layer and pressed with a pressure roll. This was duplicated in a room at 50''C and the adhesive was aged to obtain the materials of the present invention as shown in Table 2.

As seen in Table K2, it can be seen that the material of the present invention is a waterproof fabric with excellent stretchability.

In addition, two sheets of each material were stacked together, with film sides together, non-woven fabric sides together, and film and non-woven fabric sides together, and then fused at 1.5 x m using a high frequency cuelder, and then the breaking strength of the fused portion was measured. However, in both cases, the fused part was not destroyed, but the material itself was destroyed, and it is certain that this material has extremely excellent fusion properties. A polyurethane elastomer with an amino acid modification rate of 5.1% obtained as in Example 1 described in the publication was subjected to r? Two types of films, 7μ and 20μ, were obtained by diluting with MF and forming films on release paper.Additionally, an adhesive with an amino acid modification rate of 4.8 obtained as in Example 5 of the same patent application was used. The solid content was 1517 Wl, and after each film was coated on top of the above film, the urethane elastic fiber nonwoven fabric was layered and integrated in the same manner as in Example 1 to obtain the material of the present invention.The physical property values of the obtained material were as follows. Shown in the table.

As shown in Table 8, the obtained material not only has excellent stretchability and waterproof properties, but also has excellent moisture permeability.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the material of the present invention exploded into a V& shape, and FIG. 2 is a sectional view of the same material. (1) is a polyurethane elastic fiber nonwoven fabric, (2) is a polyurethane elastic film, and (3) is an adhesive.

Claims (2)

[Claims] (1) A polyurethane elastic fiber nonwoven fabric in which melt-spun polyurethane elastic filaments are laminated without being substantially bundled, and the mutual contact points of the laminated filaments are joined by the filaments themselves; and a polyurethane elastic film. A stretchable clothing material characterized by being integrated with an adhesive. (2) The thickness of the polyurethane elastic film is 5μ or more3
The elastic clothing material according to claim 1, which has a particle size of 0μ or less.