CS210583B1 - The way of dyeing shoes shoes lining materials - Google Patents

Abstract

The invention relates to the preparation of artificial shoe lining materials with increased wettability parameters from the left side. The purpose of the invention is to achieve the coloring of the lining material to the desired color shade already during impregnation with a latex mixture and to achieve color fastness without the feared wet "bleeding" from the final product when wearing shoes. This purpose is achieved by using 0.2 to 1.0 weight percent of a water-soluble metal complex ostaine or ostaline azo dye of the 2:1 type in the latex impregnation mixture, in which a cobalt or cobalt atom is complexly bound to two dye molecules. The textile backing of the lining is formed by a two-layer structure consisting of the upper layer of the woven front and the lower layer of the fleece, both layers being interwoven with each other by a needle-punched binding warp.

Description

The invention relates to a method of dyeing shoe lining materials based on a textile backing impregnated with aqueous dispersions of latex binders, in which the dyes are introduced directly into aqueous dispersions of a mixture of acrylate, butadiene acrylate, butadiene styrene or polyvinyl chloride latexes before bonding the textile backing.

As stated in the Czechoslovak Patent No. 172 509, it is required for some technical applications of latex mixtures, such as the impregnation of fibrous substrates for shoe lining materials, that these substrates be prepared for use in the required color shade. On the one hand, this shortens production times, since the need for preliminary dyeing of textile substrates by so-called textile processes is eliminated, but on the other hand, it is necessary to choose such dyeing systems that guarantee sufficient resistance of the dye to wet abrasion in the finished product. This technical problem must usually be solved in relation to the textile substrate, or rather to its fibrous composition, because the resulting effect is tied to the extent to which the dye can be fixed on these fibers.

In the procedure according to the aforementioned Czechoslovak Patent No. 172 509, a fixation reaction between auxochromic groups and -SO^H or -SO^Na groups of water-soluble reactive or subetant dyes based on di-, tri- or polyazo dyes with resins containing a methyl reactive group is used. Although the patent itself does not specifically mention the textile substrates themselves, it is known that these dyed latex mixtures are used mainly according to Czechoslovak Patent No. 145 001 for substrates made of fibers, which do not tolerate relatively high gelatinization temperatures, in which even the proportion of collagen fibers often does not bend. These substrates are single-layer in terms of structure. For multilayered pads, essentially of a heterogeneous nature, the use of which is necessary for other, improved types of shoe lining materials, the given dyeing system is not suitable.

However, according to the present invention, for dyeing shoe lining materials based on a textile backing impregnated with aqueous dispersions of latex binders, in which the dyes are applied directly to aqueous dispersions of a mixture of acrylate, butadiene acrylate, butadiene styrene or polyvinyl chloride latexes before bonding the textile backing, a method has been solved, the essence of which is that metal complex ostatoic or ostalan azo dyes of the 2:1 type are introduced into the aforementioned aqueous dispersions, representing 5 to 15 weight percent, in which one metal atom, in particular osmium or cobalt, is complexly bound to two dye molecules, generally -sroroe:

in an amount of 0.2 to 1.0 weight percent, based on the weight of the binder in dry matter, the weight of the aqueous dispersions being based on the weight of the textile backing, which comprises an upper layer of woven preform containing 25 to 29 polyamide, 15 to 19 polyester and 7 to 11 cotton fibres in weight percent and a lower layer of fleece containing 26 to 30 weight percent viscose fibres, both said fibre layers being interwoven with a needlepunched binding warp of 17 to 21 weight percent polyamide fibres, arranged in parallel columns separated from each other by spaced rows in a ratio of 5θ to 62 columns per 102 to 106 rows per 100 mm of textile

310,383 pads, the linear weight of which is equal to 430 to 440 grams and the filling weight is 325 to 335 grams per square meter.

The technological effect of the method according to the invention is given primarily by the fact that the coloring of the final product, the textile backing of which has a considerably inhomogeneous character in terms of the fiber composition, which is also reflected in the two-layer distribution, is permanent (special latex dyes preferentially attract the fibers and only with the gradual evaporation of the aqueous portions from the latex binder does a cryogenic latex layer begin to form on the surface of the textile backing, preventing the wet bleeding of the dye from the final product. This fact, originally verified by laboratory measurements, is also confirmed by the results of practical wear tests of footwear, for which a shoe lining material dyed by the method according to the invention was used.

The method of dyeing shoe lining materials according to the invention is carried out as follows. The textile backing consists of an upper layer of woven preform, which contains 25 to 29 percent by weight of polyamide fibers, 15 to 19 percent by weight of polyester fibers and 7 to 11 percent by weight of cotton fibers. It ^further contains a lower layer of fleece of 26 to 30 percent by weight of viscose fibers. Both of these layers are interwoven with a needle-punched warp of 17 to 21 percent by weight of polyamide fibers. This binding warp is arranged in parallel columns, which are separated from each other by spaced rows in a ratio of 58 to 62 columns per 102 to 106 rows per 100 mm of textile backing. The linear weight of the backing is 430 to 440 grams and the area weight is 325 to 335 grams per square meter.

The impregnation mixture is prepared by adding 0.2 to 1.0 weight percent of a dye, which is a water-soluble metal complex ostaine or ostaline dye of type 2)1, in which a metal atom, especially iron or cobalt, is complexly bound to two dye molecules, to acrylate, butadiene acrylate, butadiene styrene or polyvinyl chloride latexes, or to mixtures thereof. These dyes have the following general formula

and these include, for example, Ostalan brown PN, Ostalan brown 2GL supra or Perlon permanent red 3BS, which is a complex compound of the 1:2 type of cobalt with a dye formed from α-amino-phenol-4-eulfamide and p-naphthol, structural composition

Nq ^{+ 210 383}

The impregnating agent thus dyed is used in an amount of 5 to 15 weight percent to bond the textile backing on a Foulard type impregnating machine, followed by drying in a hot air tunnel with an expanding frame; the gap between the Poulard squeeze rollers is 0.7 mm, the impregnation speed is 12 m/min. The temperature in the dryer sections is 150°C. The backing is additionally ironed.

The tested sample of the shoe lining material, dyed by the method according to the invention, showed a resistance of the treatment to repeated bending at a temperature of 23 °C, 25 k value of 5.0 /should be at least 4.0/ and a resistance of the surface treatment to abrasion when dry 150/300 » 9.5 /should be at least 7/ and when wet 10/50/150 » 13.5 /should be at least 12.5/.

Example 1

A dyeing impregnation mixture with a dry matter content of 10% for dyeing shoe lining material was prepared in a mixing vessel with a capacity of 1000 l by mixing together 719 wt. parts of water, 180 wt. parts of butadiene-acrylonitrile latex Perbunan N 3415, 2 wt. parts of 10% silicone defoamer Lukosan A-311 and 0.4 wt. parts of brown PS. The underlying textile material was impregnated with this mixture on a Foulard impregnation machine at a consumption of 200 g/m at a speed of 12 m/min.

The textile material comprises an upper layer of woven preform consisting of 26 wt. % polyamide fibres, 18 wt. % polyester fibres and 10 wt. % cotton fibres and a lower layer of fleece containing 27 wt. % viscose fibres. Both layers are interwoven with a needlepunched binding warp of 17 wt. % polyamide fibres and this warp is arranged in parallel columns separated by spaced rows, whereby there are 62 columns and 106 rows per 100 mm of textile backing. The linear weight of the textile material is 440 g and the area g

weight 335 g per m .

The textile backing was soaked with 12 weight percent of the colored impregnation mixture and then dried in a hot air tunnel and 12 fields at a temperature of 150°C, the middle field serving as a finisher. The finished product was subsequently ironed on an iron calender.

Example 2

A dye impregnation mixture with a dry matter content of 10% for dyeing shoe lining material was prepared in a mixing vessel with a capacity of 1000 l by mixing together 718 wt. parts of water, 90 wt. parts of polyvinyl chloride latex Geon 552, 90 wt. parts of butadiene-acrylonitrile latex Perbunan S 3415, 2 wt. parts of ostalan brown 2 GL supra and 2 wt. parts of silicone defoamer Lukosan A-311. This dyed latex mixture was used to impregnate a base textile material on a Poulard impregnation machine, which comprises a top layer of woven preform consisting of 29 wt. % polyamide fibres, 15 wt. % polyester fibres and 7 wt. % cotton fibres and a bottom layer of fleece containing 30 wt. % viscose fibers. Both of these layers are interwoven with a needled binding warp of 21 wt. % polyamide fibers and this warp is arranged in parallel columns, separated by spaced rows, with 58 warps and 102 rows per 100 mm of textile backing. The linear weight of the textile material is 430 g and the area weight is 326 g per m ² .

The textile backing was coated with 15% by weight of the colored impregnation mixture at a speed of 12 m/min at a consumption of 200 g/m ² . It was then dried in a hot air tunnel with 12 fields at a temperature of 150 °C, with the last field serving as a finisher. The finished product was subsequently ironed on an iron calender. The abrasion resistance of the surface treatment was 9.5 when dry at 150/300 ee and 13.5 when wet at 10/50/150.

Claims (1)

Method for dyeing footwear lining materials based on a textile mat impregnated with aqueous dispersions of latex binders, in which dyes are applied directly to the 210 S83 aqueous dispersions of a mixture of acrylic, butadiene acrylate, butadiene ethylene, or vinyl chloride latex poles prior to bonding a textile backing, characterized in that the aforesaid aqueous dispersions are 5-15 wt. in which the two dye molecules are complexly bound by a single metal atom, in particular of the form of cobalt or tungsten, both of which: > N— N / Me z . N - N in an amount of 0.2 to 1.0% by weight based on the weight of the binder in the dry matter, the weight of the aqueous dispersions being based on the weight of the textile backing comprising a top layer of woven fabric containing 25 to 29 polyamide by weight 15 to 19 polyether fibers and 7 to 11 cotton fibers and a web layer comprising 26 to 30 wt% prooent fiber optic fibers, wherein both fiber layers are intertwined with a needle bond warp of 17 to 21 wt prooent polyamide fibers arranged in a parallel columnar are separated from each other by spaces between 56 and 62 ellipses per 102 to 106 lines per 100 mm textile * below? bearings whose ee distance is 430 to 440 grams and 325 to 335 grams per square meter ·