FR2650000A1 - TEXTILE YARN WITH SHAPE RECOVERY AND ETOFFE CONTAINING SAME - Google Patents

Abstract

Disclosed is a yarn having a shape recovering property. It relates to a composite yarn having a shape memory filament 1 and an ordinary yarn 3 intended to be combined with the shape memory filament so that the whole constitutes a composite yarn 5 with shape recovery. This yarn is used at least in part as a weft and / or warp yarn in a fabric. The deformations of the fabric disappear by simple heat treatment at a temperature between 40 and 60 degree (s) C. The ordinary wire is advantageously a wire with a metallic sparkle. Application to the manufacture of fabrics resuming their configuration after deformation, in particular of traditional Japanese obi belts.

Description

The present invention relates to wires for use in

  manufacture of fabrics that possess

  property of recovery of form, because of the incor-

  poration of a material having a shape memory, and it also relates to fabrics made with such son. Known metal strand wires include gold wire, silver wire and platinum wire. These metal-luster wires are made from paper from

  Japan, a film or a sheet of wood having a coating

  gold, silver or platinum.

  Composite yarns for use in fabrics are made from silk yarn or spun yarn or thermoplastic filament, for example nylon and polyester fibers, forming a core, yarns and yarns. with metallic luster described above forming a sheath. The fabric containing such composite yarns has already

been presented in public.

  However, it is known that composite yarns have poor elasticity and shape recovery properties, and fabrics containing such composite yarns have

  also poor properties of elasticity and

form.

  Accordingly, in such a fabric having threads

  composites, it is very difficult to remove deformities

  due to actual use, for example bulges

  folds and folds. This problem continues to arise especially in the case of the traditional Japanese belt called "obi".

  On the other hand, it has recently been

  cation of the shape memory materials in the fabrics, a soutiengorge having very elastic alloy threads introduced around its edge so that they improve the appearance, but there is no fabric made from alloys with shape memory, shape memory resins or highly elastic alloys in the form of

metallic luster.

  The invention therefore relates to yarns for use in the manufacture of fabrics which have a recovery property, due to the incorporation of a

shape memory material.

  The invention also relates to fabrics made from such yarns and in which it is possible to eliminate the deformations due to real uses, for example bulges and folds, while being

  stubborn, waterproof and of sumptuous appearance.

  The invention also relates to a wire having a

  a shape-recovering filament comprising a shape-memory filament and an ordinary wire for combination with the shape-memory filament so that they form together

a composite yarn.

  The invention also relates to a fabric made from yarns having a shape recovery property, each yarn comprising a shape memory filament and an ordinary yarn for combination with the memory filament

  of shape so that they together form a composite yarn.

  Other features and advantages of the invention

  will be better understood by reading the description

  which follows, with reference to the accompanying drawing in which: Figure 1 is an elevation of a shape memory filament for use in the form recovery wire according to the invention; Fig. 2 is an elevation of a metal flash wire for use with the shape recovering wire of the invention; FIG. 3 represents the shape recovery wire according to the invention; and Figure 4 shows a fabric made with the

  wire recovery form according to the invention.

  The form-recoverable yarns according to the invention

  are manufactured in the following manner.

  First, a 10-denier shape memory filament 1, as shown in FIG. 1, is obtained in the form of a wire of a shape memory alloy, for example a Ti-Ni alloy, or a shape memory resin, such as polynorbornane, or a very fine alloy

  elastic such as a nickel-based alloy.

  On the other hand, a metal shine wire 10 from 10 to 100 μm in thickness, as shown in FIG. 2, is obtained in the form of Japanese paper, a film or a wood sheet having gold, silver or platinum

giving him the metallic luster.

  The shape memory filament 1 and the metallic flash wire 3 are twisted, the shape memory filament 1 constituting the core and the metal flashing wire 3 a sheath, the assembly constituting a form-recovery wire 5,

  of uniform thickness and consisting of a composite

  as shown in Figure 3.

  The thickness of the shape memory filament 1 and that of the metal flash wire 3 can be chosen at various values. In general, it is preferable to select a shape memory filament having a

  denier between 1 and 100 with a metallic flashing wire

  10 to 50 μm, and a filament 1 of 11 to denier with a wire with a metallic luster 3 of 60 to

  pm. However, other combinations may be

  in certain circumstances. Thus, we can use

  use a combination of a thinner filament 1 and a thicker metal 3 wire, or a combination of a

  filament 1 thicker and 3 thread finer.

  It is generally preferable to use, for the configuration of the form-recovering wire 5, a type

  simple torsion core and sheath, but other configurations

  such as twisted or cross thread, may be

used where appropriate.

  The form-recovering wire 5 thus manufactured does not return to its original shape when it has been deformed, for example by folding simply by the application of an external force, but very easily and quickly takes up its original shape by heat treatment. a temperature between about 40 and 60 C. In addition, this wire 5 to

  recovery of form is very stubborn and impervious.

  A plain weave fabric 9 as shown in FIG. 4 can then be fabricated using the woven overwrap yarn 5 and a silk yarn 7 as a warp. Fabrics other than plain weave

can also be manufactured.

  Of course, the form-recovering yarn 5 may be used as a warp and the silk yarn 7 as the weft, or the warp and weft yarns may both be

  forms by the form recovery wire. This thread 5 is

  form can also be used partially as

part of warp or weft.

  Thanks to the use of the recovery wire 5 of

  form, the fabric can return to its original shape when

  that it has been deformed as a result of actual use, for example by forming bulges or folds, in a very quick and easy manner by heat treatment to

  a temperature of between about 40 and 60 OC.

  For this reason, the use of this form-recovering yarn in the fabric may be partially advantageous in the case of fabrics whose deformation due to actual use has been very difficult to remove so far even by cleaning specialists,

  for example the traditional Japanese belts "obi".

  Thanks to the use of the recovery wire 5 in

  these fabrics, bulges and folds can be easily

  removed, even in a simple dwelling, by an ordinary iron. Consequently, in the case of fabrics having the

  wire 5 in form recovery, the original quality of the pro-

  duit can be easily preserved and allows

  continued over a much longer period than that

  has not been possible so far.

  In addition, the fabric formed with the yarn 5 to be coated

  Form strength has other properties of the yarn such as toughness, impermeability, regular weaving ability, low weight and low manufacturing cost.

  It should be noted that, although, in the way in which

  tion. previous, the description refers to a thread 5 to

  recovery of shape with a single twist such that the shape memory filament 1 constitutes the core and the wire 3 to shine the sheath, the wire 3 can be replaced by a filament or short fibers of thermoplastic synthetic resins, for example "Nylon" or polyester resins, by regenerated acetate fibers, by

  fibredemi-synthetic rayon or natural fibers

  such as silk thread, woolen thread or linen thread. In addition, as indicated above, other configurations, for example those of a twisted yarn and a crossed yarn, can be used if necessary for the

  formation of the wire 5 with recovery of form.

  Of course, various modifications can be made by those skilled in the art to the fabrics and fabrics which have just been described as examples only.

  limiting without departing from the scope of the invention.

Claims (7)

  A yarn having a shape recovering property, characterized in that it comprises: a shape memory filament (1), and an ordinary yarn (3) combined with the memory filament   of shape so that they together form a composite wire (5).   2. Thread according to claim 1, characterized in that   that the shape memory filament (1) is formed of a material   selected from shape memory alloys, shape memory resins and alloys of elasticity very high.   3. The yarn according to claim 1, characterized in that the shape memory filament (1) and the ordinary yarn (3) are twisted together, the ordinary yarn being twisted.   around the shape memory filament.   4. Fabric made with yarns having a   recovery of shape, characterized in that each wire (5) having a shape recovery property comprises: a shape memory filament (1), and   an ordinary wire (3) intended to be combined with the   shape memory so that they together form a composite wire. Fabric according to claim 4, characterized in that the shape memory filament (1) consists of a material chosen from shape memory alloys, shape memory resins and elasticity alloys. very high.   6. Fabric according to claim 4, characterized in   what the shape memory filament (1) and the conventional thread   (3) are combined by twisting, the ordinary wire being   twisted around the shape memory filament.   7. Fabric according to claim 4, characterized in that the yarns (5) having the property of recovery of   form are used at least in part for the   chain or weft thread at least.