BASE INTERLINING, METHODS FOR THEIR MANUFACTURE AND APPLICATION THEREOF

Abstract

The invention relates to a novel binder system and its use for bonding textile fabrics as well as products containing such bonded textile fabrics. The materials according to the invention are suitable for manufacturing base interlinings which may be used for manufacturing base interlinings for sarking, roofing and sealing membranes, particularly for manufacturing coated sarking, roofing and sealing membranes.

Claims

1. A textile fabric, the textile fabric bonded to a binder system comprising: 10 to 90 wt % (dry mass) of an aqueous dispersion of polymers based on conjugated aliphatic dienes and vinyl aromatic compounds; 90 to 10 wt % (dry mass) starch; and 0 to 10 wt % (dry mass) additives, with the figures for the percentage by weight relating to the dry mass of the binder system.

2. The textile fabric according to claim 1, wherein the binder system is between 5 and 35 wt % (dry mass) of the textile fabric.

3. The textile fabric according to claim 1, wherein the textile fabric comprises a fabric comprising fibers that were manufactured according to a fabric-forming technique.

4. The textile fabric according to claim 1, wherein the textile fabric comprises at least one of natural fibers or fibers made of synthesized polymers.

5. The textile fabric according to claim 1, wherein the textile fabric comprise at least one of woven fabric, scrim, knitted fabric, or non-woven.

6. The textile fabric according to claim 1, wherein the textile fabric comprises synthetic polymer fibers.

7. The textile fabric according to claim 1 wherein the textile fabric comprises a spunbonded non-woven comprising polyamids, polycaprolactam, aromatic, or partially aromatic polyamides (aramides), aliphatic polyamides, partially aromatic or fully aromatic polyesters, polyphenylene sulphide (PPS), polymers with ether and keto-groups, or polyolefins.

8. The textile fabric according to claim 1, wherein the textile fabric comprises a spunbonded non-woven comprising polyester fibers having at least 85 mol % polyethylene terephthalate.

9. The textile fabric according to claim 1, wherein the textile fabric comprises a spunbonded non-woven comprising polyester fibers having at least 95 mol % polyethylene terephthalate.

10. The textile fabric according to claim 1, wherein the textile fabric is made of multiple layers.

11. The textile fabric according to claim 1, wherein the textile fabric has a weight per unit area of 20 and 500 g/m.sup.2.

12. The textile fabric according to claim 1, wherein the textile fabric has a heat dimensional stability of maximally 1.6% in longitudinal direction and 1.7% in cross direction.

13. The textile fabric according to claim 1, wherein the textile fabric has a heat dimensional stability of maximally 1.5% in longitudinal direction and 1.5% in cross direction.

14. The textile fabric according to claim 1, wherein: the starch comprises a mixture of amylose and amylopectin and has a molecular weight between 5×10.sup.4 and 1×10.sup.7, and the polymers are emulsion polymers consisting of: 20 to 80 parts by weight of conjugated aliphatic dienes, 20 to 80 parts by weight of vinyl aromatic compounds, 0 to 10 parts by weight of at least one of ethylenic unsaturated carboxylic acids or dicarboxylic acids, and 0 to 20 parts by weight of ethylenic unsaturated carboxylic acid nitriles, manufactured in the presence of water, emulgators, and water soluble initiators.

15. A method of manufacturing a base interlining for sarking, roofing, or sealing membrane, the method comprising using the textile fabric according to claim 1.

16. A base interlining for sarking, roofing, or sealing membrane comprising a textile fabric according to claim 1.

17. The base interlining according to claim 16, further comprising an additional reinforcement.

18. The base interlining according to claim 16, wherein the textile fabric is a first textile fabric, the base interlining further comprising a second textile fabric, wherein the second textile fabric is different from the first textile fabric.

19. A coated sarking, roofing, or sealing membrane comprising a base interlining according to claim 16 and a coating substance.

20. The coated sarking, roofing, or sealing membrane according to claim 19, wherein the coating substance comprises bitumen, polyethylene, polyvinylchloride, polyurethane, EPDM, or TPO (polyolefin).

Description

EXAMPLES

[0132] The following table 1 shows a comparison of the textile fabrics bonded with the binder system according to the invention against the respective single components of the binders.

[0133] A spunbonded non-woven based on polyethylene terephthalate (PET-spunbond) with a weight per area unit of 180 g/m.sup.2 (Type JM33/180) is examined.

[0134] Example 1 shows a standard binder system based on SBR and urea binder, example 2 shows a binder system based on urea and acrylate, example 3 shows a binder system according to the invention, example 4 shows a binder system based on starch and acrylate, example 5 shows a binder system based on starch. Typically the liquor concentration is 15-40% (i.e. solid matter in liquor)

TABLE-US-00001 Test no. 1 2 3 4 5 SBR-dispersion 90 40 urea resin 10 10 acrylate 90 40 dispersion starch 60 60 100 Set application [%] 20 20 20 20 20 (% weight of raw non-woven) Maximum [daN/5 cm] 56 59 57 51 46 longitudinal tensile force Maximum [daN/5 cm] 25 19 27 n.t. 31 longitudinal tensile force, hot Maximum cross [daN/5 cm] 47 48 45 36 36 tensile force Longitudinal TDS [%] 1.8 1.9 1.3 1.6 0.8 Cross TDS [%] −1.6 −1.8 −1.4 −1.7 −1.3 VW - Test [mg/kg FA] ~400 ~400 ~30 ~30 <10 Water suction [mm] 80 72 72 59 66