DE1297067B - Process for the production of pile fabrics (carpets) coated with foam rubber - Google Patents

Description

It is known to use pile fabrics, e.g. B. carpets or plush, by a Foam rubber layer in smooth or embossed form, slip-resistant, nub-anchoring and to design it with a stable surface.

A natural product usually provided with fillers and other additives or synthetic latex is foamed mechanically for this purpose by supplying air and applied to the fabric to be coated. The foam is created by exposure to heat solidified, i.e. gelled. In this state, however, it can still be deformed. This is usually done by means of an embossing roller.

For carpets that have been manufactured using the needle punch process are, so the so-called tufting carpets, as well as other woven carpets or plush, the pile of which is relatively loosely anchored in the base fabric for the purpose of better stud anchoring, improved core bonding, with which the penetration of the pile thread with the binder is referred to, and to achieve a basecoat was applied to improve adhesion to the textile material. men. This is done by applying a non-foamed latex compound, which if necessary is provided with fillers and other additives. The properties listed above are achieved by such a primer coat, what when using a sole Foam spread because of the inadequate wetting effect or poor penetration into the fabric as well as because of the low mechanical strength of the foam can only be insufficiently achieved.

It is also already known, pile fabrics for carpets without a base coating to be coated with latex foam, using anionic or nonionic foaming agents Substances are used and the foaming is kept in a ratio of 1: 2. By this type of treatment will essentially provide stiffening and slip resistance of the carpet. The knob pull-out strength as well as the capillary bonding of the single filaments, especially in the case of fully synthetic fiber materials but relatively small. There is also no possibility of increasing the foaming ratio to be kept as 1: 2, otherwise the core bonding and stud anchoring will continue would be decreased.

It has now been found that even through a single, unique Foam spread in the manufacture of using foam rubber from natural or synthetic Pile fabrics (carpets) coated with rubber milk have very good knobs anchoring from below, Core bonding and adhesion can be achieved by looking at the back to be coated of pile fabrics before coating with the foam spread in one operation anion-active, cation-active with an aqueous solution of a surfactant or non-ionic character or with a solution of a foam-destroying resp. Antifoam agent pretreated.

The measure according to the invention increases the wetting capacity of the foam significantly increased, which leads to better stud anchoring. Through the wetting agent or the foam-destroying agent namely destroys the foam at the interfaces and penetrates the pile fabric and sub-fabric. A better hold and with it one higher pull-out strength and capillary integration of the pile threads is the immediate Follow this. This technical effect also occurs when the surface-active Substance is the same as the foam compound in the latex whipped foam.

All customary surface-active substances, preferably ethylene oxide condensation products, can be used of non-ionic character, can be used. As foam-preventing or -destructive Substances, however, all common materials can be used, in particular Ethyl hexanol, isopropyl alcohol, emulsified mineral oils or silicone defoamers.

The effect with regard to the stud anchoring, the core bonding and adhesion can be achieved by smooth or textured embossing under considerable pressure can be increased by means of a roller immediately after gelation.

In series tests it was not only found that the above explained way pretreated tissue with respect to knob anchoring one with a Latex base coat of usual composition precoated and then with latex foam fitted carpets are not just equivalent; it turned out that the Pull-out force, measured in kilograms, of the treated according to the method according to the invention Pimple was higher. So was z. B. comparatively a tufted carpet without pretreatment coated with latex foam (expansion ratio 1: 3) and another with a Apply a highly filled latex base coat according to the following composition: 0, parts complex phosphate compound, 24.6 parts water, 4.0 parts vulcanization paste, 0.3 Parts ammonia, 50.0 parts chalk, 21.0 parts synthetic latex.

The vulcanization paste for this base line was composed from: anti-aging agents, vulcanization accelerators colloid sulfur, zinc oxide, Pigment distributors and stabilizers based on methyl cellulose.

After this basecoat dried, a whipped foam became the following Composition applied: 6.0 parts of water, 17.5 parts of vulcanization paste, 31.5 Parts chalk, grind K, 21.0 parts synthetic latex, 23.0 parts centrifuge latex.

Gelling agent ... 3.90% ammonium sulfate 1.30%, gel time. . . 5 minutes at 1000 C, vulcanization time .. 10 minutes at 1400 C.

This whipped foam recipe also applies to the one mentioned in the first place Attempt. The vulcanization paste of the whipped foam was composed of soaps, Emulsifiers, pigment distributors, stabilizers, Vulcanization accelerators, Zinc oxide, sulfur and anti-aging agents.

Furthermore, the backs of tufted carpets were treated with an anti-foam treated or foam-destroying agents before the application of the whipped foam. Emulsified mineral oil was used as an anti-foaming agent, once as 1 0 / The solution of perchlorethylene with an application of 200 g / m2 and as 5% Solution also made of perchlorethylene with an application of 240 g / sqm and then as 5 0 / o solution of perchlorethylene with an application of 1100 g / m². The solvent was allowed to evaporate. Then the whipped foam was applied at 1000 g / m². It turned out The following results turned out to be the values for the knobbed anchoring: Carpet backing without Pretreatment and whipped foam application of 1000 g / sqm. . 1.1 kg carpet backing with Base coat and whipped foam application of 1000 g sqm 1.8 kg 10 / o solution of antifoam agent in the form of emulsified mineral oil (solvent perchlorethylene), application 100g / sqm . . 1.63 kg 50% solution of emulsified mineral oil (solvent perchlorethylene), Application 240 g / sqm. . ... 1.8 kg 50 / above solution emulsified mineral oil (solvent Perchlorethylene), application 1100 g / m2. 2.3 kg The above kilogram values are it is the force that is required to remove a knob from the coated back of the carpet pull out.

In a further experiment, a pretreatment with a wetting agent was used performed. A non-ionic wetting agent was used. It is about it is an oxyethylation product with a non-ionic character. Furthermore got one wetting agent on an anion-active basis and one on a cation-active basis for use. Here a 20% aqueous was used to anchor the tufted carpet Solution applied with an application of 200 g / m2. Then each were 1000 to 1100 g / sqm Latex whipped foam applied. The following stud anchoring resulted: 20% solution of a non-ionic wetting agent in water, application 200g / m². 2.9 kg 20% solution of an anionic wetting agent in water, application 200 g / sqm .. 2.8 kg 20 / The solution of an anionic cold wetting agent in water, application 200 g / m² 2.9 kg 20% solution of a cationic surfactant in water, application 200 g / m² 2.7 kg The pull-out strength of the pile thread was tested by coating it Carpet samples as a loop in the lower clamp of a tear strength tester brought in. A hook was clamped into the upper clamp, which again beforehand inserted into the loop of the pile thread, which must be present as a loop thread became.

The tear values achieved indicate the pull-out strength of the pile thread digestion from the base fabric or the latex foam coating.

The method according to the invention results in improved stud anchoring in addition to Saving both a work step and the material costs for the base coat.

Claims (3)

Claims: 1. Process for the production of foam rubber pile fabrics (carpets) coated from natural or synthetic rubber milk, characterized in that the fabric prior to its coating with a solution of a surfactant, anion-active, cation-active or non-ionic Character or a foam-destroying or foam-preventing agent pretreated will. 2. The method according to claim 2, characterized in that as surface-active Substance of non-ionic character ethylene oxide condensation products are used. 3. The method according to claim 1, characterized in that as a foam-destroying or anti-foaming agent ethylhexanol, isopropyl alcohol, emulsified mineral oils or silicone defoamer is used.