DD208640A1 - METHOD FOR PRODUCING COATED FLUID IMAGES - Google Patents

Abstract

It describes the production of coated surfaces, which are used as floor coverings, flocked decorative products, etc. described. The aim and object of the invention is to produce coated surfaces, in particular flocked surfaces or loop pile fabric, which have a high adhesive strength of the textile material on a carrier material during production and in use with effective production in large working widths. According to the invention, this is achieved by applying a heat-meltable mass of thermoplastic elastomers, waxes and resins to the carrier material in a liquid state and holding it in this state until it is applied or applied with fibers, casings or flakes and then cooled.

Description

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Title of the invention; Process for producing coated fabrics Field of application of the invention: The invention relates to a method for coating

of fabrics to bond to other textiles or non-textile material, such as flock fibers,

Pile threads u. a., to reach. The coated fabrics, for example

used as floor coverings and flocked decorative products.

Characteristic of the known technical solutions;

For the coating of fabrics, mixtures based on aqueous dispersions with and without fillers and crosslinking agents are used. These mixtures have the disadvantage that for the production of the Beschchtungsfilmes with great energy expenditure, the dispersant evaporates wer-denmuß and the mixture to achieve the required strength, a crosslinking at temperatures above 373 K is required.

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The amount of heat required in this case is very high, and it will take long and expensive drying and curing units required. A large part of these dispersions or their waste products represent a burden on the environment (waste air and waste water). Furthermore, one very often applies plastic solutions or also plastisol, which have to be dried and / or gelled, whereby the recovery of the solvents is costly.

It is known that it is possible to prepare blends with hotmelt adhesives and mineral fillers which are used on needle felt or carpet webs of up to 2000 mm working width as a back-applied layer for stiffening, weighting, for example, for self-laying tiles. This back coating is no longer flexible and tends to break when bent.

Furthermore, according to DE-PS 1 213 107 known that hot melt adhesive can be transferred by the roll-melt method on a fabric web to 1500 mm width directly or in the transfer process. In this method, however, only very small masses can be realized, as they come only for self-adhesive films, self-adhesive fabric articles used.

Furthermore, it is known that coatings of textile material on one side or on both sides with einbügelfähigem liner made of sinterable plastic powder. These materials have a very low build-up of sintered powder with mostly discontinuous layer to alter the textural character of the material, such as flexibility, grip, not essential. These coatings are also made in relatively small working widths (maximum 1500 mm).

The known methods do not lead to an optimal solution in the embedding of fibers, threads, etc. The required binding strength and technically and technologically necessary values are not achieved.

For anchoring flock fibers PVC paste is often used as an adhesive. This adhesive has the disadvantage that it has a poor adhesion to the base material, and that, as a result of wet treatment (ζ B. pressure), the scuff resistance of the pile side is adversely affected.

Aim of the invention ;

The object of the invention is to produce coated fabrics, in particular flocked fabrics or loop pile fabric, which have a high adhesive strength of the textile material on a carrier material during all processing stages and in use while maintaining the other required properties, such as stability, Trittelasticity, etc., with low production costs respectively.

Explanation of the essence of the invention;

The object of the invention, in the case of coated fabrics, in particular flocked fabrics or loop pile fabrics, is a flexible bonding layer between backing material and textile material, such as flock fibers or threads, with high adhesive strength, in particular also when wet and in heavy use. Use layer thickness and working width.

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The object is achieved according to the invention in that a connection between carrier material and textile material in the case of coated fabrics, in particular flocked fabrics or loop pile fabric, is carried out by a heat-meltable mass. The heat-meltable mass is liquefied in its melting range and applied to a carrier material with a heated applicator, such as a knife blade or a squeegee. Due to the effect of temperature, for example infrared radiation, the schraelzflüssige mass is held on the substrate in their state and flock fibers, threads or fabrics up or introduced into this mass. With the cooling, a secure bond of the coated fabric is achieved.

The molten mass according to the invention consists of:

1. elastomer content of thermoplastic elastomers, such as polyethylene-polyvinyl acetate copolymer, modified polyamides, polyesters, polybutadiene, polyolefin, polyisoprene, polyisobutylene, polyvinyl ether or modified polyacrylate.

2. Wax content of natural wax such as beeswax and / or synthetic wax such as paraffin or other hydrocarbon waxes.

3. Resin content, from natural resins such as rosin, spruce resin and / or synthetic fusible resins.

It is surprising that an excellent adhesive strength between the heat-fusible with this _mass: subway and the introduced or deposited fibers or filaments is concluded, and that this adhesion

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strength over use of the composite article over long periods of time. According to the invention, such a heat-meltable composition is made

IO - 90 parts Polyethylene-polyvinyl acetate copolymer with 60 - 80 % polyethylene and 20 - 40 % polyvinyl acetate

90-10% by weight of a synthetic and / or natural wax

20-80 mass of a natural and / or synthetic fusible resin

with a melting range of 383 - 523 K and a melt viscosity of 1000 - 17000 m Pae particularly suitable to form flexible, well-adhesive layers. In this case, an application mass as Fadeneinbettung of 250 - 750 g / m and for fiber: was determined as favorable.

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250 - 750 g / m and for fiber embedding of 100 - 500 g / m

By means of this process according to the invention, the high energy density of other processes required for drying and crosslinking is substantially reduced, without the qualitative parameters, such as elasticity, adhesion, flexibility, being adversely affected. For this reason, much higher coating speeds are possible with less investment.

Another advantage over other known methods is that according to the invention without waste products, such as wastewater, exhaust air or toxic substances, -worked, and that returner of this heat-meltable mass without loss of quality can be repeatedly fed to the ongoing production process.

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Surprisingly, it has been found that fillers introduced into this mixture, such as chalk, alumina gel, kaolin, in a proportion of up to 30% by mass, the quality, ie. H. the flexibility, adhesion, elasticity, not adversely affect.

In accordance with the internationally customary equipment machine braite, the solution according to the invention is also possible in the working width of 4000 mm.

The invention will be explained with reference to exemplary embodiments. Example 1;

On a Florofolträgermaterial with back coating, a layer of liquid hot melt adhesive at about 453 K as a flock adhesive by the following technology:

- Knife blade and Rakeltrogwandungen be resistance-heated from the outside,

additional mass heating by means of oil-immersed immersion tube,

the web to be coated is carried out under the knife blade under constant conditions,

- the applied film is kept open by radiant heat until fibers or filaments or fabrics are applied or applied

The amount of the hotmelt adhesive application is 180-200 g / m ² at an application width of 2000 mm.

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The hot melt adhesive is made from a mixture of

45 mass polyethylene-polyvinyl acetate copolymer with 80 parts polyethylene and 20 parts polyvinyl acetate

25% by weight paraffin wax (melting range approx

 353K)

30 mass rosin

produced and combined in an electrically heated container to form a homogeneous melt.

The Schmlez range is 413 - 433 K.

The after application to the substrate by infrared heat up to and including the flock in liquid phase held heat-meltable mass is flocked by known methods with colored Flockfasarn and cooled immediately after, cleaned and rolled up.

As a surface design, the flocked floor covering is printed by a rotary screen printing process.

Embodiment 2;

On a uncoated tufted raw material in 4000 mm width of a product produced according to Example 1 liquid hot melt adhesive applied in an application amount of 350 g / m.

The heat-meltable mass consists of:

20 mass polyethylene-polyvinyl acetate mixed

polymer with 80 parts polyethylene and 20 parts polyvinyl acetate

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20% paraffin (solid) 30% rosin 30% mineral filler, such as chalk

The composite is cooled by a chill roll and wound up.

Version 3;

Application and processing as in embodiment 1, wherein the hot melt adhesive mixture consists of the following products:

80 pigs of a low-melting polyamide

(Melt index at 463 K> 15 g / 10 min)

10 mass% rosin

10 paraffin paraffin (solid)

For ex ma ction 1 4:

A textile carrier material according to embodiment 1 with a melt adhesive layer of approx

 100 g / m provided and then laminated with another textlien fabric (surface-structured fleece).

It is inexpensive to obtain a high-quality laminate, which can be used as a decorative sound and heat-insulating product for interior design and for other applications, such as for bag makers.

Claims (5)

241936 5 Invention claims; . Anspruch [en] A process for producing coated fabrics, in particular flocked fabrics or loop pile fabrics, by applying to a backing material a curable adhesive layer into which flock fibers and / or threads are anchored or entrapped or applied to the fabrics prior to curing, characterized in that Support material is a heat-meltable composition IO - 90 mass polyethylene-polyvinyl acetate mixed polymer with 60-80 % polyethylene and 20-40 % polyvinyl acetate 90-10% by weight of a synthetic and / or natural wax 20-80 mass of a natural and / or synthetic fusible resin 0-30 mass% fillers with a melting range of 383 - 523 K and a melt viscosity of 1000 - 17000 m Pas applied by means of a known heated applicator - 10 - and brought in the liquid state fibers, threads or fabrics in or on this mass and the sheet is cooled by known methods below the melting range of the mass, cleaned and after-treated. 2. The method according to item 1, characterized in that the application amount of the heat-meltable mass for the fiber embedding in the range of 100 - 500 g / m and for the bonding of threads or surface be set in the range of 250 * 750 g / m. 3. The method according to item 1 and 2, characterized in that the application of the heat-meltable mass is carried out on the carrier material up to a working width of 4000 mm. 4. The method according to item 1-3, characterized in that the heat-meltable mass is added in place of the polyethylene-polyvinyl acetate Mischpolyrnerisats or in admixture with this thermoplastic polymers of the following consistency: modified polyamides, polyesters, polybutadiene, polyolefins, modified acrylic copolymers and / or polyethylene terephthalates. 5. The method according to item 1-4, characterized in that the coated sheet is preferably surface-treated by dyeing, printing and / or embossing.