FLAT TEXTILE STRUCTURE WITH COATING

Abstract

A textile fabric with a woven support layer including at least polyethylene and/or polyester fibres. A surface coating is applied onto at least one surface of the support layer, and the surface coating includes at least one polymer blend. The polymer blend has at least one mixture of polyethylene and polyethylene-vinyl acetate, and the polymer blend has more than 40 wt. % of polyethylene-vinyl acetate, based on the total weight of the polymer blend.

Claims

1. A textile fabric, wherein the textile fabric has a woven support layer comprising at least polyethylene and/or polyester fibres, wherein a surface coating is applied onto at least one surface of the support layer and the surface coating comprises at least one polymer blend, wherein the polymer blend has at least one mixture of polyethylene and polyethylene-vinyl acetate, and the polymer blend has more than 40 wt. % of polyethylene-vinyl acetate, based on the total weight of the polymer blend.

2. The textile fabric according to claim 1, wherein the polyethylene-vinyl acetate in the polymer blend contains a vinyl acetate content of 10-40 wt. %, based on the weight in the polymer blend.

3. The textile fabric according to claim 1, wherein the polymer blend has less than 51 wt. % polyethylene, based on the total weight of the polymer blend.

4. The textile fabric according to claim 1, wherein the support layer is constructed entirely from fibres made from polyethylene and/or polyester.

5. The textile fabric according to claim 1, wherein the surface coating on the at least one surface of the support layer is applied over the entire surface.

6. The textile fabric according to claim 1, wherein the polymer blend is polyvinyl chloride-free.

7. Method A method for manufacturing the textile fabric according to claim 1, comprising coating the support layer with the surface coating by a melt calender on the at least one surface of the support layer.

8. The method according to claim 7, wherein the support layer is coated over a width of more than 3 m over the entire surface in one process step.

9. A method for manufacturing the textile fabric according to claim 1, comprising shaping and fixing the textile fabric by high-frequency welding.

10. A method for manufacturing the textile fabric according to claim 1, comprising lacquering the coated surface with a polyvinyl chloride-free lacquer or a polyvinyl chloride-containing lacquer.

11. A vehicle tarpaulin comprising the textile fabric according to claim 1.

12. A packaging tarpaulin, tend tarpaulin cloth, inflatable boats, flexible containers, or bag comprising the textile fabric according to claim 1.

13. The textile fabric according to claim 1, wherein the textile fabric is configured to be used in the fields of architecture, advertising, visual protection, sheathing and/or temporary weather protection.

14. A foil product manufactured from the textile fabric according to claim 1, wherein the foil product has at least one weld seam formed by high-frequency welding.

Description

[0035] FIGS. 1, 2 as well as 3a) and 3b) each show photographs of textile fabrics, wherein sample 1 was coated with a pure PE-polymer blend and sample 2 was coated with a polymer blend made from a mixture of polyethylene and ethylene-vinyl acetate copolymer according to claim 1. FIGS. 4a and 4b each show photographs of a sample 3 and a sample 4, wherein in sample 3 a textile fabric with a coating according to claim 1 and another textile fabric with a coating made from polypropylene were welded by means of hot air and wherein sample 4 shows a hot air welding of a textile fabric according to claim 1 with another textile fabric with a coating of polyethylene.

[0036] FIG. 1 shows both samples 1 and 2, wherein the support material was a textile fabric in both cases. As a result of the use of the woven support layer, it can be seen clearly in FIG. 1 that after the coating a flat, homogeneous surface was formed, which can be printed well, for example.

[0037] In FIG. 2, two identical sample pieces (i.e., samples made from the same material) were placed one on top of one another and processed by means of thermal stress (hot air). It can be clearly seen that in sample 1 as well as in sample 2 the coating material melted locally and bonded together to form a seam, FIG. 2 thus clearly shows that both samples 1 and 2 can be thermally welded. As a result of the welding, adhesion values can advantageously be achieved at least between the textiles in the range from 8 to 70 N/cm, preferably from 12-60 N/cm, most preferably from 15-40 N/cm and even more preferably from 20 to 25 N/cm. The adhesion value is determined using the standard ISO 2411:2017 (EN ISO 2411:2017), wherein the second method of sample preparation of the standard is to be used and the values that are measured in the machine direction (i.e., in warp direction) are to be applied to the measurement of test specimens.

[0038] In FIG. 3a and FIG. 3b, two identical sample pieces were placed one on top of one another and processed by means of high-frequency welding. In both figures it can be clearly seen that only in sample 2 the coating material melted locally and connected with on another to form a seam. In sample 1, no such connection occurred, so that a cohesion of the two sample 1 pieces cannot be determined. The difference in sample 1 and sample 2 is that the pure PE compound (sample 1) can be thermally welded (e.g., by means of hot air welding), just like the PE/EVA as sample 2, but only sample 2 can also be processed by means of high-frequency.

[0039] In FIG. 4a, a sample 3 was formed from a textile fabric according to claim 1 and another textile fabric with a coating made from polypropylene. By means of hot-air welding, an adhesion value of more than 50 N/cm could be achieved without edge waviness. In FIG. 4b, a sample was formed from a textile fabric according to claim 1 and another textile fabric with a coating made from polyethylene. Here, too, in connection with the textile fabric according to the invention, a connection could be achieved by hot-air welding, which has an adhesion value of at least 50 N/cm without producing edge waviness. Here, too, the adhesion value is determined using the standard ISO 2411:2017 (EN ISO 2411:2017), wherein the second method of sample preparation in the standard should be used and the values that are measured in the machine direction (i.e., in warp direction) are to be applied to the measurement of test specimens.