FR2561678A1 - TEXTILE PLANE SURFACE REINFORCING PRODUCT, METHOD FOR ITS IMPLEMENTATION AND APPLICATIONS - Google Patents

Abstract

THE REINFORCEMENT PRODUCT, BASED ON A WATER-BASED THERMORETICULABLE RESIN, INCLUDES A POROGENIC AGENT WHOSE POROGENIC ACTION IS ACHIEVED AT A TEMPERATURE BETWEEN THE BOILING TEMPERATURE OF THE WATER AND THE RETICULATION TEMPERATURE OF THE RESIN. THE RESIN IS ACRYLIC OR POLYURETHANE; THE POROGENE AGENT IS CHOSEN AMONG THE DERIVATIVES OF HYDRAZINE WHICH DECOMPOSES BY RELEASING NITROGEN. THE PROCESS CONSISTS OF TREATING THE TEXTILE SURFACE ON WHICH THE REINFORCING PRODUCT HAS BEEN APPLIED AT A TEMPERATURE ABOVE THE BOILING TEMPERATURE OF THE WATER, AND SUFFICIENT SO THAT ON THE ONE HAND THE RETICULATION OF THE RESIN AND ON THE OTHER HAND THE POROGEN ACTION IS REALIZED. APPLICATION TO THE REINFORCEMENT OF TEXTILE PIECES INTENDED FOR CLOTHING, ESPECIALLY IN MEN'S DRAPERIE.

Description

TEXTILE PLANE SURFACE REINFORCEMENT PRODUCT, METHOD FOR THE PRODUCTION THEREOF

IN WORK AND APPLICATIONS

  The present invention relates to a reinforcing product intended to be applied on a flat textile surface to reinforce it for the purpose of, for example, making articles of clothing. It also relates to the reinforcing process, using said product and the use of this product to reinforcement of surfaces

textile planes.

  The reinforcement of flat textile surfaces aims to bring

  these surfaces additional stiffness. It is usually

  coating a polymeric material which cures by solvent evaporation, thermo-crosslinking or other known method. In most of their applications, textile surfaces

  reinforced, however, must retain flexibility. For this purpose,

  technical rents have been developed; they are based on a

  differentiated coating of the surface, that is to say that the whole surface

  textile side is not coated, but only a part of it, so that the uncoated portion gives the set the desired flexibility; in this case the application can be made according to separate and parallel lines, or according to points of variable size. Such a method of application by screen printing is described in the French patent 77 11 270. Nevertheless these methods have their limited applications in the extent to which the textile surfaces thus reinforced do not have a hand, a resistance to rubbing and dry cleaning which

  correspond to the requirements imposed on the reinforcement surfaces

  especially in men's clothing.

  Now it has been found, and this is the subject of the invention, a product for reinforcing flat textile surfaces, which makes it possible to overcome the aforementioned drawbacks of known methods. This product,

  of a thermally crosslinkable resin in aqueous dispersion, is

  characterized in that it comprises a pore-forming agent whose pore-forming action

  is carried out at a temperature between the boiling point

  of the water and the crosslinking temperature of the resin. The pre-

  The presence of micropores provides the required flexibility, but their creation

  tion occurs as the crosslinking is taking place, from the complete evaporation of the water; As a result, the resin exhibits good adhesion to the textile surface, contrary to what occurs with foam coatings or friction resistance.

  is poor because the many micropores in contact with the

  textile face decrease the attachment of the resin itself.

  The thermally crosslinkable resin in aqueous dispersion is chosen from

  known resins, such as acrylic or polyurethane resins,

  thannes. It must have a crosslinking temperature compatible with

  ble with the textile surface to be reinforced; indeed the treatment of

  resin crosslinking should not alter the characteristics of the

  especially mechanical of the textile material. The crosslinking temperature

  the resin must therefore be lower than the

  lissement of the material of which the textile surface is composed. In the case of textile materials normally used in clothing,

  natural materials - cotton, wool - or synthetic - polyester,

  lyamide - the crosslinking temperature of the resin should not be

  180 C. In addition, the resin, once cured, must have a

  good resistance to solvents and detergents used in the

dry cleaning.

  Advantageously, the pore-forming agent is a substance which decomposes

  heat-setting with formation of a volatile by-product. If it is a solid substance in the form of powder, not soluble in water, the blowing agent is incorporated in the aqueous dispersion with strong mechanical stirring. Preferably, the pore-generating agent is chosen from hydrazide derivatives whose decomposition releases

  nitrogen, in particular 3,3 'sulphonyl-bis (benzene sulphonyl)

hydrazide).

  Advantageously, the reinforcing product comprises from 0.5 to 5%

of porogenic agent.

  Of course, other substances may be included in the composition of the reinforcing product according to the invention. These are particularly thickeners, compatible with the thermally crosslinkable resin, which have

  to increase the viscosity of the product. The amount of thickeners

  in the product is a function of the desired viscosity, and that

  it is itself a function of the grammage and the texture of the surface.

  this textile on which the product is applied. Indeed the product must remain on the surface and must not cross the textile surface on which it is applied; this condition is imperative when the reinforcement is carried out on a textile surface which is intended to be used as it is, and whose non-reinforced face constitutes

  the visible part of the finished article. It can also be sub-

  stances intended to promote the storage of the product, for example

  avoiding the evaporation of water which has the effect of causing the creation of a film on the surface of the product. It can also be

  wetting agents, pigments etc ...

  It is another object of the invention to provide a process for the implementation of the aforementioned reinforcing product. This process

  is characterized in that it applies to a textile surface said

  reinforcement and by subjecting said surface to

  temperature at a temperature equal to the crosslinking temperature

  tion of the heat-curable resin for a given time. ad-

  the product is applied to the textile surface in a differentiated manner, either in separate and parallel lines, or in points

of varying sizes.

  The invention will be better understood with the aid of the detailed example described below. A product for reinforcing textile surfaces is produced by adding the following substances:

  at. 8000 ml of an acrylic resin with 44% dry matter: this

  sine is heat-curable at 1600C for one minute, b. 310 ml thickener, acrylic structure, 50% dry matter, c. 160 ml of n-butanol,

  and by mixing with the dispersion obtained, under strong mechanical stirring

  nique, d. 50 g of 3,3'-sulfonyl-bis (benzenesulfonylhydrazide)

in the form of a white powder.

  The reinforcing product thus obtained is applied according to the screen-printing technique to a piece of pure wool fabric weighing

  400 grams per square meter for making men's drapery.

  The product does not penetrate the fabric. The room, on which was

  The reinforcement product is pleated by points and is subjected for 1 minute to a heat treatment at 1600 ° C. During the first part

  heat treatment, the water contained in the reinforcing

  evaporates, then the temperature increasing the pore-forming agent

  It forms and releases nitrogen from about 130 ° C to about 155 ° C, which creates micropores in the resin that has already begun to crosslink. Once the crosslinking is complete, the piece of fabric thus reinforced has a hand, a flexibility which is suitable for its use.

  as the front of the jacket, and on the other hand the resistance to

  drying and dry cleaning of the resin on the fabric are sufficient

  for this purpose. The piece then weighs about 500 grams per square meter.

  The invention is not limited to the example described. The man of

  tier can easily choose, depending on the textile surface to

  reinforce and the use to be made of it, on the one hand

  sine heat-curable, on the other hand the porogenic agent, and finally the

  possible other constituents of the reinforcing product. In the same way he will have to choose the proportions of each of these constituents and the quantity of product to be applied according to the reinforcement and the

  flexibility desired. With regard to the pore-forming agent, it has been noted

  whereas, surprisingly, compared with the other uses which are made of it especially in flexible PVC where the proportions of 15% are usual, in the reinforcing product according to the invention a proportion of 0.5 to 5% is enough to get the

  desired flexibility. One explanation might be that the agitation

  necessary to incorporate the pore-forming agent in the form of

  dre in the aqueous dispersion brings into the product air that is

in itself a porogenic agent.

  The invention is particularly applicable to textile surfaces used in the manufacture of men's drapery, especially the front of jacket, and also in the manufacture of women's articles; she has

  however, it is intended to apply whenever we seek to apply

  on a textile surface a reinforcing material, resistant to

  rubbing and dry cleaning, and while wanting to keep to the

  this textile enough flexibility and hand.

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Claims (8)

  1. Reinforcement product for flat textile surfaces, based on   thermally-curable in aqueous dispersion, characterized in that it com-   carries a pore-forming agent whose pore-forming action takes place at a temperature   between the boiling temperature of the water and the temperature   cross-linking of the resin. 2. Product according to claim I characterized in that the resin   thermosetting agent chosen from acrylic or polyurethane resins.   at a crosslinking temperature of less than 180 ° C.   3. Product according to claim 1, characterized in that the porous agent   gene is a substance that breaks down by heating with formation of a volatile by-product.   4. Product according to claim 3, characterized in that the porous agent   The gene is chosen from hydrazide derivatives, the decomposition of which releases nitrogen.   5. Product according to claim 4, characterized in that the porous agent   The gene is 3,3 '- sulfonyl - bis (benzenesulfonylhydrazide).   6. Product according to one of claims 3 to 5 characterized in that   contains from 0.5 to 5% of blowing agent.   7. Product according to claim 1 characterized in that it comprises   also a thickening agent compatible with the thermosetting resin   sand. 8. Product according to claim I characterized in that it comprises   also an agent limiting the evaporation of water, especially the n-bu-   tanol. 9. Method of reinforcing flat textile surfaces characterized in   what is applied on the textile surface the reinforcing product sec-   one of the preceding claims and in that the   the surface for a given time to heat treatment at a temperature of   higher than the boiling point of the water and sufficient to   on the one hand the crosslinking of the resin and on the other hand the pore do not come true.   10. Method according to claim 9 characterized in that it applies   the reinforcing product by the screen printing technique.   ] 1. Process according to Claim 9, characterized in that the heat treatment consists in heating for one minute at 160 ° C a product of 256 1,678   reinforcement based on acrylic resin and containing 3,3 'sulphonyl   bis (benzene-sulphonyl-hydrazide).   12. Application of the product and process according to one of the claims   reinforcement of textile pieces intended for   clothing, especially men's drapery.