FR2459851A1 - Lightweight knitted fabric formed by two webs - of polyester and polyamide protecting against heat absorbent of moisture - Google Patents

Abstract

The webs of knitted jersey connected to each other by fixing stitches distributed over the surface of the webs, form a fabric which pref. has about 11,500 to 14,500 fixing stitches per square m. The fabric is less in wt. that 160 g per square m. and the inner web is knitted in a hydrophillic yarn such as cotton. The outer fabric is of polyester. The fabric may have a weight less than 200 g per square m. with the inner web knitted in hydrophobic yarn such as polypropylene. A new fabric for sporting and leisure wear. The fabric is light in wt. compared to those previously available for these purposes. It gives protection against heat and is absorbent of water so prolonged contact of the skin with perspiration is avoided. Outer garments are not necessary when this fabric is worn. The internal fabric may be a polyamide, polyester or acrylic, esp. "ultron" (RTM) or "Oranyl" (RTM).

Description

The present invention relates to a new fabric intended for the production of textile articles of clothing such as in particular swimwear for the practice of sports or leisure.

 The new fabric according to the invention is essentially characterized by the fact that it consists of two sheets of jersey knitted simultaneously and linked together by load points distributed over the surface of the sheets.

Such a fabric can in particular be obtained on a loom
Jacquard with double needle bed comprising an upper cylinder and a lower cylinder, the needles of the cylinders being brought together at regular or irregular intervals, to produce the load points intended to link the two layers and which can, for example, be distributed every twelve meshes . The fabric thus advantageously has from approximately 11,500 to approximately 14,500 load points per m2.

 The new fabric according to the invention has, thanks to its structure, a set of properties which it has not so far been possible to bring together, which makes it particularly advantageous for the production of jerseys which can be used in particular by competitive athletes.

 Indeed, for each of the specific applications envisaged, the fabric according to the invention has, for a low weight compared to that of conventional fabrics for the same application, on the one hand thermal protection properties and on the other hand properties water absorption and wiping which can be determined and adapted to the optimum values desired for the intended application. It is thus possible, thanks to the fabric according to the invention, to produce light jerseys, of excellent comfort for the user thanks on the one hand to the thermal insulation procured and, on the other hand thanks to the possibility offered by '' avoid prolonged contact with the skin of sweat formed during exercise.

 It is thus remarkable that with the new fabric according to the invention, users can give up the habit, made necessary by the fabrics currently available, of superimposing several garments to ensure comparable properties at the expense of the lightness of the garment and the comfort in use.

In a first embodiment for the production in particular of jerseys which can be used for the practice of indoor sports, outdoor sports in summer, as well as for the practice of activities requiring similar thermal protection properties (thermal protection index measured according to standard
NF G.07.107 less than about 21), the threads of the two plies of the fabric according to the invention are chosen so as to give the fabric a weight of less than about 160 g / m2, the internal ply being knitted in a hydrophilic yarn.

 By hydrophilic yarn is meant within the meaning of the invention, a yarn comprising at least one natural, artificial or synthetic textile material, of cellulose or derived nature, having a conventional recovery rate of conditioning greater than 7%.

This rate, legally defined, indicates the water content of a material placed in hygrometric equilibrium with ambient air at 200 to 65% humidity. Among these materials, mention may be made in particular of cotton, silk, viscoses, polynosics, acetates as well as triacetates.

Polyamides, polyesters or modified acrylics offering comparable water absorption properties are also suitable for producing the internal ply according to the invention. The materials marketed under the ULTRON brand by the company MONSANTO or ORANYL by the company are thus suitable
RHONE POULENC.

 For the production of the external layer, it is possible to use all the materials making it possible to produce a ply which, linked to the internal ply defined above, makes it possible to ensure the desired weight. The material of the external ply can thus be chosen according to the desired external appearance of the fabric. One can, for example, use a yarn of poly zester fiber with a count of 20 tex.

According to a second embodiment, in particular for making swimsuits for the practice of outdoor sports, in more severe climatic conditions, especially in winter, where the desired thermal protection index must be greater than 21 (measured according to the standard NF G. 07.107) a fabric is produced whose weight is less than about 200 g / m2, the internal ply being knitted from a hydrophobic yarn, that is to say, according to the invention, comprising minus a textile material whose conventional conditioning recovery rate is less than 7%, or a material having one of the same water absorption properties. As a material which is particularly suitable, mention may be made of polypropylene, in particular in the form of a wire having a count of 16 tex. The external ply can be made of any material having the desired external appearance and ensuring in combination with the internal ply which comes from be defined the desired weight for the fabric.

 It is possible in particular to use, as in the first embodiment, a polyester fiber yarn with a count of 20 tex.

 According to another embodiment in particular for the manufacture of jerseys which can be used in particular for the practice of cycling or similar sports where the required thermal protection index of the fabric is greater than about 26, the fabric according to the invention is knitted with an internal ply produced, as in the second embodiment, from a hydrophobic thread, the external ply in this case also being made of a hydrophobic thread, the threads of the two plies being chosen so that the weight of the fabric is less than approximately 280 g / m2.

 In this case, it is advantageously possible to use a retractable acrylic yarn, in particular with a count of 16 tex, for making the two plies.

 We will now describe, without limitation, three examples of implementation of the invention.

EXAMPLE 1
It is carried out, according to the invention, on a loom
20 gauge double needle interlock, a fabric with the following structure inner ply: 13 tex cotton thread, outer ply: 20 tex shiny polyester fiber yarn.

The fabric obtained has a weight of approximately 150 g / m2, distributed in 40% for the inner ply and 60% for the outer ply.

This fabric has a thermal protection index (standard NF G.07.107) of 19.8, a porosity in air (determined according to standard NF G.lll) of 15.5.

 Subject to a water absorption test, the fabric obtained retains after deep spin an amount of water corresponding to an increase of 49% in the weight of the fabric. In addition, good wiping properties are observed.

 Such a fabric is particularly suitable for the practice of outdoor sports in summer; for example the practice of team sports such as football, or for the practice of indoor sports such as for example volleyball.

EXAMPLE 2
It is carried out, according to the invention, on a loom
20 gauge double needle interlock, a fabric with the following structure inner ply: 16 tex polypropylene yarn, outer ply: 20 tex shiny polyester fiber yarn.

The fabric obtained has a weight of approximately 170 g / m2, distributed in 47% for the inner ply and 53% for the outer ply.

 This fabric has a thermal protection index (standard NF G.07.107) of 24.5, an air porosity (determined according to standard NF G.07.111) of 19.3.

 Subject to a water absorption test, the fabric obtained retains after deep spin an amount of water corresponding to an increase of 20% in the weight of the fabric.

 The fabric obtained is particularly suitable for the production of jerseys for the practice of outdoor sports such as for example football, in unfavorable climatic conditions, especially in winter.

EXAMPLE 3
It is carried out, according to the invention, on a loom
20 gauge double needle interlock, a fabric with the following structure inner ply: retractable acrylic thread 16 tex, outer ply: retractable acrylic thread 16 tex.

The fabric obtained has a weight of approximately 220 g / m2.

 This fabric has a thermal protection index (standard NF G. 07.107) of 28, a porosity in air (determined according to standard NF G.07.111) of 6.6.

 Subject to a water absorption test, the fabric obtained retains after deep spin an amount of water corresponding to a 27% increase in the weight of the fabric.

 The fabric obtained is particularly suitable for the practice of sports such as cycling where it is necessary to maintain strong thermal protection during periods of prolonged effort.

 Although the invention has been described in connection with particular exemplary embodiments, it is obvious that it is in no way limited thereto and that numerous modifications can be made to it without departing from its scope or of his mind.

Claims (14)

1. Fabric characterized by the fact that it consists of two jersey plies knitted simultaneously and connected together by load points distributed over the surface of the plies. 2. Fabric according to claim 1, characterized in that it has from approximately 11,500 to approximately 14,500 load points per m2.  3. Fabric according to any one of claims 1 and 2, characterized in that it has a weight less than about 160 g / m2 and that the inner ply is knitted in a hydrophilic yarn  4. Fabric according to claim 3, characterized in that the internal ply is knitted in cotton thread.  5. Fabric according to any one of claims 3 and 4, characterized in that the outer ply is knitted in polyester fiber yarn.  6. Fabric according to any one of claims 1 and 2, characterized in that it has a weight less than about 200 g / m2 and that the inner ply is knitted in a hydrophobic yarn. 7. Fabric according to claim 6, characterized in that the internal ply is knitted from polypropylene yarn. 8. Fabric according to any one of claims 6 and 7, characterized in that the external ply is knitted in polyester fiber yarn.  9. Fabric according to any one of claims 1 and 2, characterized in that it has a weight less than about 280 g / m2, that the inner ply is knitted in a hydrophobic yarn and that the outer ply is also knitted into a hydrophobic yarn.  10. Fabric according to claim 9, characterized in that the two plies are knitted in a retractable acrylic yarn.  11. Application of the fabric according to any one of claims 1 to 10, for the production of clothing articles, in particular sports or leisure jerseys. 12. Sports or leisure jersey, in particular for practicing outdoor sports, in particular in summer, or indoor sports, characterized in that it is made of a fabric according to any one of claims 3 to 5, having a thermal protection index (standard NF G.07.107) less than around 21.  13. Sports or leisure jersey, especially for outdoor sports, especially in winter, characterized by the fact that it is made of a fabric according to any one of claims 6 to 8, having a thermal protection index (standard NF G.07.107) greater than around 21. 14. Sports or leisure jersey, especially for cycling, characterized in that it is made of a fabric according to any one of claims 9 and 10, having a thermal protection index (standard NF G. 07.107) greater than approximately 26.