CS222784B1 - Laminated sheet material - Google Patents

Abstract

Material intended primarily for haberdashery processing into cables, briefcases, suitcases and similar products. It consists of a base textile layer, a middle lightweight polyvinyl chloride layer and a cover double layer. The cover double layer with a total basis weight of 100 to 250 g/m is composed of a base layer of plasticized polyvinyl chloride and a surface layer of thermoplastic polyurethane, with the basis weight being 4 to 14%, preferably 7 to 9% of the total basis weight of the cover double layer. The thermoplastic polyurethane of the surface layer is preferably based on one or a mixture of the reaction products of polyester polyol with aliphatic diisocyanate and diol or diamine and has a molecular weight of 3,000 - 10,000.

Description

The invention relates to a laminated sheet material of increased rigidity and abrasion resistance, consisting of a backing textile layer, a middle layer of expanded polyvinylchloride and a bilayer covering primarily intended for haberdashery for briefcases, suitcases and the like.

For the known types of laminated polyvinyl chloride based materials, which by their rigidity meet the above-mentioned applications, the traditional layer structure is generally used - a textile lightweight polyvinyl chloride layer is applied on the textile base and a polyvinyl chloride covering layer which has sufficient abrasion resistance However, the formations produced in this way must be treated with varnish, screening or spraying with protective varnishes based on polymethylmethacrylate, polyurethane, nitrocellulose, polyamides, etc., in order to achieve satisfactory contact properties and to prevent plasticizer migration to the surface. two-color or multi-color treatment can be obtained, these materials are printed with printing rolls and then subsequently coated with raster rolls.

In the case of a single-color or two-color finish in semi-matt or matt finish, it is necessary to prepare these materials by a multi-stage process. · In the first phase the material is produced by indirect application on steel strip or smooth release paper. and raster roller surface treatment. The desired matt character is then achieved in the third production stage by the design of the matt roller. However, the achieved semi-matte or matte finish is less resistant to abrasion due to the minimal build-up and is not entirely suitable for demanding haberdashery applications in the manufacture of cases, cables and briefcases.

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The problems associated with the post-treatment of laminated formations by varnishing have been successfully eliminated for materials consisting of a textile backing, a middle expanded polyvinyl chloride layer and a thermoplastic polyurethane-based cover layer. The method of manufacturing these laminates consists in the stepwise coating of the thermoplastic polyurethane and the middle layer in the form of a polyvinyl chloride plastisol containing blowing agents on a paper release liner, subsequent lamination of the backing fabric, expansion of the formation, cooling and separation from the substrate. The obtained sheet composite materials have increased abrasion resistance and very good organoleptic properties, but they are unusable for demanding haberdashery applications in the manufacture of cases, cables, briefcases and similar products due to their lack of rigidity.

(The object of the invention is therefore to provide a laminated sheet material which, by its stiffness and abrasion resistance, in particular in half or matte finishes, satisfies the requirements of the above-mentioned demanding haberdashery applications, has adequate organoleptic properties and can be produced in a single technological operation. The problem is solved by a material which is based on the traditional structure consisting of a backing textile layer and a middle expanded polyvinyl chloride layer attached by a cover double layer consisting of a base layer of plasticized polyvinyl chloride and a surface layer of thermoplastic polyurethane. O

the topcoat bilayer is 100-250 g / m, the proportion by weight of the polyurethane coating being 4-14%, preferably 7-9% of this total basis weight. The thermoplastic polyurethane surface layer is preferably based on one or a mixture of products of the reaction of a polyester polyol with an aliphatic diisocyanate and a diol or diamine, and has a molecular weight of 3,000-10,000.

The main advantage of the laminated sheet material according to the invention is an increased rigidity bond compared to the known materials

- 3 222 784 with improved abrasion resistance and good organoleptic properties, enabling its successful use in demanding haberdashery applications, especially in the manufacture of suitcases, cables, briefcases and similar products. number of technological operations, work in progress, material and labor costs, etc.

The process for the production of a layered sheet material according to the invention consists of the stepwise application of a surface polyurethane layer, a polyvinyl chloride base layer and a medium deposition of plastisol polyvinylchlorides containing a blowing agent or blowing system on a paper separation substrate, laminating the backing fabric, forming an object, cooling it and separating it from the substrate. according to the process, it is possible to prepare laminated material in various variants - depending on the degree of pigmentation of the surface layer of thermoplastic polyurethane and the base layer of softened polyvinyl chloride, monochromatic or bi-color material matu ·

The production method described is entirely suitable for materials with a substrate based on a precipitated fabric with a dense deposition. The thin base fabrics must be pre-treated by the application of the polyvinyl chloride mixture by loose knife coating technology - without pad.

The following ^{part of the} invention serves to illustrate the invention ^{in greater detail}

Example 1

The following blends were prepared on the quick mixer at 1000 rpm · (the amounts of each component are given in parts by weight) with

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Mixture δ. 1: 25 ^ solution of polyurethane polymer (reaction adduct of polyester polyol based on hexamethylene adipate, iaophorene diisocyanate and diethylenediamines having a molecular weight of 6 650 and E modulus 100% 25 MPa) with a viscosity of 8 360 mPa.s at 25 ° C 50

2 ^ polyesterurethane polymer solution (reaction adduct of polyester polyol based on hexamethylene adipate, iaophorone diisocyanate and diethylenediamines having a molecular weight of 8,300 and Ξ modulus of 100% 11 MPa) with a viscosity of 11,400 mPa.s at 25 ° C 10 toluene 35 isopropanol 5 carbon black 0.1 dioctyl phthalate 0.5 dry matter mixture 15.6 wt. %

Mixture δ. 2: polyvinyl chloride - emulsion paste-forming (K = 70) 100 dioctyl phthalate 55 dibutyltin mercaptide (stabilizer) 1 pigments 6

Mixture No. 3: polyvinyl chloride - emulsion paste-forming (K = 74) 100 dioctyl phthalate 60 dibutyl phthalate. 5 azodicarbonamide 1,2 cadmium-zinc acylate (kikr) 1 carbon black 0,5

A 100 g / m 2 of mixture No. 1 was applied to a paper separating mat, patterned in a semi-matt version, after drying at 70-100 ° C, a layer of 200 g / m ^{2 of} mixture No. 2 and after its pregelatinization at 150 ° C. layer 550 g / m ^{2 of} mixture No. 3 · A molino fabric was then laminated into this layer. After expansion at 190-200 ° C and cooling, the laminate was separated from the support.

A material with the following properties was obtained:

appearance - two-color «finish in semi-matt design imitating natural leather thickness 1.6 mm

- 5 basis weight 0,9 kg / m ^ 222 784 abrasion resistance - abrasion resistance according to Rowles (ČSN 64 7031) at

0,087 MPa, dry 5000 c without damage to the touch - dry, non-sticky.

Example 2

Separation pad and deposits of mixtures δ. 1 and 2 were identical to Example 1, the layer of mixture No. 3 was applied at 470 g / m 2. The high shrinkage molino backing fabric was pretreated with a coating of 80 g / m of mixture No. 2, applied with a free knife coating technique without a backing. The fabric so treated was then laminated into the layer of blend # 3; the further procedure was identical to that of Example 1. The physical-mechanical and appearance properties of the laminate obtained were similar to those of Example 1.

Example 3

The speed mixer was 3000 rpm. mixture No. 4 (quantities of individual components are given in parts by weight):

25 ^ · Polyurethane polymer solution (reaction adduct of polyester polyol based on hexamethylene adipate, isophorone diisocyanate and diethylenediamines having a molecular weight of 6650 and an E modulus of 100% 25 MPa) with a viscosity of 8 360 mPa.s at 25 ° C 40

25% polyesterurethane polymer solution (reaction adduct of polyester polyol based on hexamethylene adipate, isophorone diisocyanate and diethylenediamines having a molecular weight of 8,300 and an E modulus of 100% 11 MPa) at a viscosity of 11,400 mPa.s at 25 ° C 8 toluene 45 isopropanol 7 , 1 dioctyl phthalate 0,5 dry matter mixture 12,6 ^ύ / ₆

A 100 g / nr of the mixture of No. 4 was applied to a paper separation mat patterned in a semi-matte finish, after drying at

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- 100 ° C then a layer of 250 g / nr mixture fi. 2 and after its pregelatinization at 150 ° C a layer of 600 g / m ^{2 of the} mixture fi. 3. The molino fabric was then laminated into this layer. After expansion at 190-200 ° C and cooling, the laminate was separated from the substrate.

A material having these properties was obtained;

appearance - two-color finish in semi-matt design imitating natural leather 1.8 mm thick basis weight 1,0 kg / m abrasion resistance - abrasion resistance according to rowboats (ČSN 64 7031) at 0,087 MPa, dry 5000 c without damage to the touch - dry, non-sticky.

The layered material obtained is stiffer than the materials of Examples 1 and 2 and is suitable for processing high-frequency forming techniques.

Example 4

A 100 g / m 2 of mixture No. 1 was applied to a paper separation pad patterned in a semi-matt version, and after drying at 70-100 ° C, a layer of 100 g / m ^{2 of} mixture fi. 2 and after its pregelatinization at 150 [deg.] C. a layer of 400 g / m of the mixture fi. 3. A molino fabric was then laminated into this layer. After expansion at 190-200 ° C and cooling, the laminate was separated from the substrate.

A material having these properties was obtained;

appearance - two-color finish in semi-matt design imitating natural leather thickness 1.2 mm basis weight 0,65 kg / m ² abrasion resistance - abrasion resistance according to rowboats (ČSN 64 7031) at 0,087 MPa, dry 5000 c without damage to the touch - dry , non-sticky.

The material obtained is lighter and softer than the material of Example 1 and is suitable for light haberdashery products.

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Example 5

Individual layers were applied sequentially to the matt patterned paper separation pad in accordance with Example 1. A material with similar mechanical properties to Example 1 was obtained, in a two-color matt finish with increased abrasion resistance.

Example 6

It was on the quick mixer at 1000 rpm. mixture No. 5 (quantities of individual components are given in parts by weight):

25 ^. Polyurethane polymer solution (reaction adduct of polyester polyol based on hexamethylene adipate, isophorone diisocyanate and diethylenediamines having molecular weight

650 and E modulus 100% 25 MPa) with a viscosity of 8 360 mFa.s at 25 ° C 56 toluene 34 isopropanol 4 pigments 6 mixture dry matter 21,5%

A 100 g / m @ 2 mixture of Compound # 5 was applied to a matte patterned paper separation pad after drying at 70-100 C.

Then, a layer of 200 g / n / blend No. 2 and after its pregelatinization at 150 ° C. a layer of 550 g / m blend No. 3 * A molino fabric was then laminated into this layer. After expansion at 190-200 ° C and cooling, the laminate was separated from the substrate. A material with similar mechanical properties to Example 1 was obtained, monochromatic in matte finish with increased abrasion resistance.

Claims (1)

Laminated sheet material with increased stiffness and abrasion resistance, consisting of a backing textile layer, a middle expanded polyvinyl chloride layer and a cover double layer, characterized in that its cover double layer has a total basis weight of 100-250 g / m is composed of a base layer of plasticized polyvinyl chloride and a surface layer of thermoplastic polyurethane having a molecular weight of 3,000-10,000, preferably based on one or a mixture of reaction products of a polyester polyol with an aliphatic diisocyanate and a diol or diamine, The total layer weight of the cover bilayer is 4-14%, preferably 7-9%.