JPS6319358Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a leather-like slit tape that is flexible and has excellent knitting properties.

[Background technology]

Conventionally, silvered artificial leather-like sheet products have been produced using three or two layers of non-woven fabric or knitted fabric as a base, with or without a porous layer interposed on one side, and a continuous film layer of a non-porous layer laminated thereon. Many artificial leathers made of layered structures are on the market.

Recently, these artificial leathers have been widely used by tape-cutting them into slits as clothing materials, or knitting fabrics by hand or using a flat knitting machine.

However, these slit tapes obtained by conventional methods, such as tapes made using non-woven fabric as a base, lack strength when cut into narrow widths of 1.5 to 2 mm, and also have poor elongation and strong rubber elasticity. However, it was difficult to make a knitted fabric due to poor knitting properties when put on a knitting machine.

In addition, only one side of the product is made of suede or silver, and in many cases the back side cannot be used.Therefore, when knitting is reversed, the back side comes out, so the product is not aesthetically pleasing. I was in a state where I couldn't do it.

On the other hand, attempts have been made to make slit tapes using products with a silver surface on one side of tricot knitted fabrics or brushed fabrics, but tapes made of these materials are strong enough to withstand strong However, at present, full-fledged leather-like tapes have not been made due to the disadvantages of hotsurel, lack of suppleness in texture, and lack of luxury. The present applicant previously proposed a suede-like string-like material in Utility Model Application No. 143296/1983, but this had only a suede-like appearance and feel.

[Purpose of invention]

The object of the present invention is to provide a reversible type leather-like tape that is flexible and has excellent knitting properties, and can be used on both the silver and suede sides.

[Structure of the idea]

The present invention has a grain layer made of polyurethane elastomer on one side, a suede layer made of ultrafine fibers of 0.5 denier or less on the other side, and a base fabric made of knitted fabric between the grain layer and the suede layer. intervening, and its breaking strength is 0.08Kg/mm or more, and its breaking elongation is 30
~150% leather-like slit tape.

Next, the present invention will be explained with reference to the drawings.

The figure is a cross-sectional view showing an example of the leather-like slit tape of the present invention, in which 1 is a grain layer made of polyurethane elastomer, 2 is an ultrafine fiber layer with a single fiber strength of 0.5 denier or less, 3 is a knitted fabric, and 4 is a single fiber fineness. 0.5
Shows a suede surface layer made of ultrafine fibers of denier or less.

As the sheet structure used in the present invention before being made into a slit tape, a non-woven structure in which a knitted fabric is used as a base fabric and ultrafine fibers are entangled with the knitted fabric is suitable from the viewpoint of imparting strength and elongation characteristics. The nonwoven fabric is a structure in which both sides of a base fabric made of a knitted fabric are covered with layers made of ultrafine short fibers of 0.5 denier or less, and the structure includes a base fabric made of a knitted fabric, a single fiber fineness of 0.5 denier or less, It has a sheet structure composed of a group of ultrafine short fibers in which ultrafine short fibers separated into single fibers with a fiber length of 1 to 10 mm are randomly assembled, and the base fabric and the group of ultrafine short fibers are substantially intertwined and integrated. It is necessary that both sides of the base fabric be covered with these ultrafine staple fibers.

The purpose of using knitted fabric as the base fabric here is to give the slit tape appropriate elongation characteristics, thereby imparting a soft texture and drapability, as well as improving knitting strength. However, when a woven fabric or the like with low elongation characteristics is used as the base fabric, it is difficult to exhibit this characteristic.

Furthermore, when a conventional nonwoven fabric structure made of artificial leather is used, it is particularly difficult to provide the necessary strength to a narrow tape.

According to the study results of the present inventors, the breaking strength of the slit tape is at least 0.08 kg/
mm is required, and the elongation at break is 30
~150% was the best in terms of workability such as knitting properties, texture, etc. The breaking strength varies depending on the width of the slit tape, but if the value is less than 0.08 kg/mm, not only will the tape break during processing, but it will also cause problems in terms of practical use as a product.

Furthermore, if the elongation is less than 30%, not only the knitting properties will be poor, but the drapability of the product will also be poor, and the knitted product will have poor elongation properties, making it uncomfortable. On the other hand, if it exceeds 150%, the elongation is too large, and its recovery power becomes a problem, making it unsuitable as a product. There is a limit to the width of the slit tape, and from the viewpoint of ease of handling as a product, the width of the slit tape must be at least 1 mm or more.

The reason for using ultrafine fibers of 0.5 denier or less in the present invention is to impart a soft, drapey texture similar to natural leather.

If it exceeds 0.5 denier, it is difficult to obtain a natural leather-like feel.

An example of a suitable manufacturing method for a sheet structure suitable for the slit tape of the present invention is as described in Japanese Patent Publication No. 54-27402 and Japanese Patent Publication No. 55-47153. A paper web is made by paper-making ultrafine fibers, and this is superimposed on a base fabric made of a knitted fabric (preferably a base fabric made of a knitted fabric of latent shrinkable fibers) to form a laminate, and then the laminate is are stacked on a support with a substantially smooth surface, entangled and integrated by high-pressure liquid treatment, and then, if a latent shrinkable base fabric is used, the base fabric is subjected to shrinkage treatment. One method is to make a sheet structure using The sheet structure thus obtained becomes morphologically stable by subsequent dyeing and polyurethane impregnation treatment. Furthermore, since the sheet structure obtained in this way has excellent entangling properties, it has the characteristic that the amount of polyurethane for impregnation can be reduced.
The result is a product with excellent flexibility. The film layer provided on one side of the sheet structure using polyurethane elastomer is excellent in terms of feel and performance.

The polyurethane used here is generally used for synthetic leather, and any polyurethane can be used without particular limitation as long as its performance is satisfactory. A suitable thickness of the continuous coating layer made of this polyurethane elastomer is 15 to 50 microns. If the thickness is less than 15 microns, the texture will be softer and the drape will be better, but there will be problems in terms of performance, especially abrasion resistance and scratch resistance, making it impractical. On the other hand, if it exceeds 50 microns, the rubber elasticity of the polyurethane resin increases, resulting in poor flexibility, which not only makes it impossible to create a slit tape similar to natural leather, but also results in poor knitting properties.

25 to 35 in terms of texture, performance, knitting properties, etc.
The best product can be obtained with a micron size.

This film layer can be processed by directly coating the previously obtained substrate using a knife coater, roll coater, etc., or by coating a polyurethane resin on a release paper and drying it. After that, it can be obtained by a method such as laminating it onto a substrate via polyurethane for adhesive.

This coating may be formed in combination with a foam layer or may be a non-porous layer. In addition, by changing the hue of this film layer and the substrate, it is possible to produce an effect of different colors on both sides, and in addition to a reversible effect in appearance, it is also possible to produce a reversible effect in hue.

The product obtained with the above structure is then processed to improve the writing effect by softening, rubbing, grinding of the raised surface, raising, brushing, etc., and is then used as a product. After that, hang this product on a slitter and adjust it to an appropriate width, e.g. 1.5mm, 2mm, etc.
After slitting it to 5 mm, etc., wind it up on a bobbin to make slit tape.

The leather-like slit tape obtained in this way can be used as it is as an accessory for clothing, but the field where it can be particularly useful is when it is applied to a knitting machine to make knitted fabrics either alone or with other yarns. Its characteristics can be demonstrated by

For example, 3 pieces of slit tape cut into 2mm width.
When knitted on a gauge flat knitting machine, it has a very soft texture and is very beautiful with a moderate proportion of the polyurethane film layer (silver surface layer) and napped layer (suede surface layer) exposed on the surface. It is possible to knit a knitted fabric.

Also, its knitting properties are no different from knitting using ordinary yarn.

[Effect of idea]

The leather-like slit tape of the present invention constructed as described above is flexible and has excellent knitting properties, and has a special effect in that both the silver and suede surfaces can be used.

[Brief explanation of the drawing]

The figure is a sectional view showing an example of a leather-like slit tape according to the present invention, in which 1 is a grain layer made of polyurethane elastomer, 2 is a single fiber fineness
3 is a knitted fabric, and 4 is a suede surface layer made of ultrafine fibers with a single fiber fineness of 0.5 denier or less.

Claims (1)

[Scope of utility model registration request] One side is a grain layer made of polyurethane elastomer, the other side is a suede layer made of ultrafine fibers of 0.5 denier or less, and a base fabric made of knitted fabric is interposed between the grain layer and the suede layer, However, its breaking strength is 0.08Kg/mm or more, and its breaking elongation is 30 to 150%.
Leather-like slit tape.