CS245236B1 - A method for producing a primary backing fabric for tufted carpets with increased resistance to damage caused by needling and tufting needles - Google Patents

Abstract

A method of producing primary backing fabric for tufted carpets is proposed that significantly reduces damage, especially to weft tapes during the needling and tufting process. The essence is that 0.6% to 3% of preparations are applied to the tapes or fabric, which affect the surface properties of the tapes during their mutual movement and sliding.

Description

(54) Method of Manufacturing a Primary Backing Fabric for Tufted Carpets with Increased Resistance to Damage Caused by Needle Needles and Tufted Needles

There is provided a method of manufacturing a primary backing fabric for tufted carpets that substantially reduces damage, especially weft tapes during the needling and tufting process.

The essence is that 0.6% to 3% of the formulations that affect the surface properties of the tapes during their movement and slip are applied to the tapes or fabric.

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The invention relates to a method of manufacturing a primary backing fabric for tufted carpets, which solves the reduction of damage, in particular to weft tapes, during the needling and tufting process.

Previously known primary backing fabrics are produced by woven from stretched polypropylene tapes characterized by non-zero thermal shrinkage and subsequently heat treated on a fusing machine to provide the desired dimensional stability, eliminate internal stresses and reduce fabric stiffness.

From the stretched and thermally stabilized strips, which have almost no or no shrinkage, the primary backing webs can be produced without thermal stabilization on the fixation frame. These backing fabrics are also characterized by higher damage to the warp and in particular to the weft during tufting and needling.

The process of tufting or needling always causes tape damage associated with a decrease in the average fabric strength. Damage to the weft tapes is always greater than the warp tapes, so that the minimum local values of the stiffness of the weft after stitching determine the strength of the backing fabric in other teohnologid operations. The operational reliability of these operations increases with the likelihood of local excess damage to the underlying fabric and thus a decrease in the tensile strength in the weft direction below a certain critical limit.

In order to improve the processability of the tapes and to reduce electrostatic charge, the primary backing fabrics are treated by deposition

0.2% to 0.5% of preparations with markedly antistatic effects.

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By these methods only a limited improvement in the degree of damage during tufting can be achieved. Indeed, they do not cover all the significant factors involved in the dynamics of the tufting process, as is apparent from experiments with non-fixed fabrics made of thermally stabilized zero shrinkage tapes, which are difficult to sew and are severely damaged. For primary backing fabrics with higher displacements, thermal fixation in the area does not remove accidentally occurring critical damage associated with an uneven force field during fixation and associated effective internal strains of the tape and fabric.

The above-mentioned drawbacks are overcome by the method of manufacturing the primary backing fabric of the present invention, which is based on the application of 0.6% to 3% of formulations on the tapes or fabric that affect the surface properties of the tapes as they move and slip relative to strain of fabric in the process of tufting.

The effect of the treatment results in a low decrease in the average strength of the backing fabric and a relatively equal tensile strength in the weft direction after needling and tufting. It also reduces the resistance of the fabric and hence the force required to penetrate the needles to low values and also reduces the wear of the needles.

The treatment allows tufting into non-fixed fabrics made of non-zero or zero shrinkage tapes with less weft damage than tufted into untreated fixed fabrics.

Treatment with the needling process also has a positive effect.

The composition is applied either in the production of stretched and stabilized bands, during warping, or prior to fixation, in the case of rewinding of a fabric using microwave heating, or in a combination of the above methods. In addition to having a beneficial effect on the tufting process, the formulations must have suitable rheological properties, sufficient thermostability, suitable handling properties, reduced foaming of the washings and must not adversely affect the adhesion of the binder backing.

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Ethoxylated fatty alcohols, aliphatic alcohols formed by the co-action of ethylene oxide and propylene oxide, potassium salt of mono / diester of phosphoric acid, whose ester group is derived from a derivative formed by the reaction of alcohol up to 0 with a mixture of ethylene oxide (1.3 moles) ) and propylene oxide (1.7 mol or from nonylphenol with ethylene oxide 1 to 1.7 mol), the diethanolammonium salt of mono / diesters of phosphoric acid, wherein the ester is derived from a derivative formed by the reaction of an aliphatic alcohol C10 with up to about 2 moles ethylene oxide; from branched aliphatic alcohol to G G with ethylene oxide 0-2.5 mol. Further, they are ethoxylated derivatives of fatty acid amides or mixtures thereof.

Example 1

Primary backing fabric woven from polypropylene warp tape of 600 dtex and 95% weft tape

POP and 5% PE with a fineness of 1,200 dtex, not heat-treated or surface-treated, were coated on foulard with 1 ethoxylated aliphatic alcohol and dried. Tufting on a 1/8 ”needle sewing machine caused weft damage resulting in an average strength decrease of 25 with a coefficient of variation of 6%, a maximum strength decrease of 35% · Tufting into untreated, unfixed starting fabric was accompanied by a decrease in average weft strength 77% at a coefficient of variation of 17% and a maximum strength decrease of 85% relative to the minimum strength found. The ductility in the weft direction for the treated backing fabric was 11.3 for the stitched untreated fabric to 4.5% ·

Example 2

The primary backing fabric of the same tape grade and fineness as in Example 1 was fixed in a fusing machine and then applied with 1% of the formulation as before. When sewing on a 1/8 ”needle sewing machine, the weft tapes are damaged

245 236 with an average strength decrease of 25% at a coefficient of variation of 6% and a maximum strength decrease of 32%, elongation at break 10.5% ·

For comparison, a fixed but untreated backing fabric due to tufting decreased the average weft direction strength by 32%, at a coefficient of variation of 8%, the maximum strength decrease was 42% and the elongation at break was 8.5% ·

Claims (5)

SUBJECT OF THE INVENTION A method of making a primary backing fabric spiked or unpunched for tufted floor mats woven from polyolefin-based tapes, characterized in that it is applied to the tapes of 0.6 to 3% of a tuft reducing agent while at the same time reducing damage. 2. Method according to claim 1, characterized in that the composition is applied to the fabric before it is fixed. 3. The method of claim 1, wherein the composition is applied to the fabric after fixation. 4. The method of claim 1, wherein the composition is applied after weaving onto the fabric without fixation. 5. A method according to claim 1, wherein the composition is applied n. fabric before spiriting.