CS213518B1 - Hat mixture for the manufacture of headgear - Google Patents

Abstract

The invention relates to a mixture intended for the production of hat products. The mixture, in addition to rabbit or hare fur, contains a layer of synthetic fibers, namely 3 to 50% by weight of fibers from segmented polyurethane in the form of staple with a staple of 8 to 50 millimeters.

Description

BACKGROUND OF THE INVENTION The present invention relates to a composition intended for the manufacture of hats, hitherto made from rabbit or hare hair, which additionally contains a proportion of synthetic fibers of segmented polyurethane in order to form a homogeneous base material dyeable in a single acidic color.

The decisive influence on the quality of the hat products is the effective work and the composition of the hat mass, i.e. the quality of the classical and synthetic fibers used.

The recent reduction in the number of rabbits and hares has resulted in a reduction in resources for the production of the basic raw materials of the hat industry, ie rabbit and rabbit hare. This makes the raw material deficit and significantly increases its price.

The substitutions made so far by synthetic fibers have the disadvantages mentioned above. When polyester and polyacrylonitrile synthetic fibers were used, the increased susceptibility to static electricity in the production of the masterbatches did not loosen the fibers and form clumps. These clusters are further enhanced during the dyeing process at a later stage due to the significantly different dye uptake ability. Therefore, it was necessary to use sophisticated multi-stage and multi-stage dyeing techniques using at least two dye technology groups. Another significant disadvantage of the above-mentioned synthetic fibers is the retardation of the felting and fulling process, which is due to the low resilience and ductility of these synthetic fibers.

According to MS. No. 142. 873, the knitting intended especially for headgear products comprises a mixture of natural animal and chemical fibers, the chemloc fibers being undrawn. Felt for hat products usually contains 3 to 60% of undrawn chemical fibers, technical felt 5 to 70% of undrawn chemical fibers.

United Kingdom Patent 987,163 protects thermoplastically shaped articles, in particular hats, which are made of a woven or knitted fabric of synthetic material. The woven or knitted fabric comprises 50 to 90% of fibers made of acrylonitrile polymers and 10 to 50% of those fibers that solidify by heating and are made of thermoplastic polymers.

A method for making hats from a mixture of natural and synthetic fibers is also disclosed in the description of the invention to United Kingdom Patent 1,056,285. the material cures by heat, giving the hat a solid final form. The binder is used in the form of a solution, dispersion or emulsion. As the synthetic plastic material contained in the binder, the polyvinyl chloride, polyvinyl acetate, polyethylene, polypropylene, polybutadiene, butyl acrylate, butyl methacrylic acid ester, polyacrylic or polymacrylic acid amides, acrylonitrile or formaldehyde adducts, or urea blend or urea blend may be used. With the binder containing the copolymer dispersion mixture, the mixtures comprise vinyl radicals, a polyacrylamide solution and a melamine preformed melamine pre-condensate solution, whereupon the mixture is heat cured. The binder can

The silicone may contain a mixture of a dispersion of a copolymer with a polyacrylic acid ester, a polyacrylamide solution and a solution of melamine-formaldehyde precondensate for a longer time, after which the mixture is heat-cured.

Other alternatives included in the binder are, for example, a mixture of a copolymer dispersion with polyacrylic acid ester derivatives, a polyacrylamide solution, and a melamine pre-condensate melamine solution, followed by heat curing again. The binder may also comprise a mixture of a copolymer dispersion with a mixture comprising vinyl radicals, a polyacrylamide solution, a melamine-formaldehyde precondensate solution. A further addition to the binder is a mixture of the copolymer dispersion with a polyacrylic acid ester, a polyacrylamide solution, a melamine preformed melamine formaldehyde solution. The binder may comprise a mixture of a copolymer dispersion with a polyacrylic acid ester derivative, a polyacrylamide solution, a melamine preformed melamine formaldehyde solution. It may also contain a polymer dispersion mixture of butyl acrylate, butadiene and acrylamide, an aqueous solution of polyacrylamide, an aqueous solution of trimethylolmelamine and ammonium chloride. It can furthermore be a mixture of acrylic acid butyl ester polymer dispersion, acrylamide and methacrylamido-N-methylol methyl ether and ammonium chloride, the mixture always being heat cured. Finally, the binder comprises polymerized reactive groups capable of cross-linking at elevated temperatures.

The above-mentioned disadvantages have no hat mass according to the invention which, in addition to rabbit or rabbit hair, contains 3 to 30% by weight of segmented polyurethane staple fibers having a staple of 8 to 30 millimeters.

The segmented polyurethane fibers are uniformly loosened in the hat blend and do not form clumps. Due to their flexibility, they do not slow down the felting and valehovaoi process and allow the dyeing of hat mixtures to the same shade by one technological group of dyes.

Example 1

10% by weight of 20 mm segmented polyurethane fibers are added to the hat blend for rabbit hat containing smooth fur. Blending, blowing, felting, felting, kicking, hardening, dyeing, shaping and decorating operations are performed. The dyeing is carried out in a one-way process with an acid dye.

Example 2

15% by weight of segmented polyurethane fibers, at a distance of 20 mm, are added to the female velor hat composition containing rabbit and rabbit fur. The treatment procedure is the same as in Example 1.

Claims (2)

1. A hat-mix for the manufacture of headgear, the material of which consists predominantly of rabbit or rabbit hair with a proportion of synthetic fibers, characterized in that it contains: 213 SIS 3 to 30% by weight of staple segmented polyurethane fibers. 2. The capsule mixture of claim 1, wherein the staple fibers present have a staple of 8 to 30 millimeters.