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 comprising: spunbonded textile fibers; and a binder that solidifies the textile fibers into the textile fabric, wherein the binder is formed from a binder system comprising an aqueous anionic dispersion of: starch; and emulsion polymers, wherein the binder system has 5 wt. % or less of ethylenically unsaturated carboxylic acids based on the weight of the binder system.

2. The textile fabric of claim 1, wherein the binder system has 3 wt. % or less of the ethylenically unsaturated carboxylic acids based on the weight of the binder system.

3. The textile fabric of claim 1, wherein the textile fabric has a heat dimensional stability of at most 1.6% in a longitudinal direction and at most 1.7% in a cross direction.

4. The textile fabric of claim 1, wherein the textile fibers comprise polyester fibers.

5. The textile fabric of claim 1, wherein the textile fibers comprise spunbonded fibers.

6. The textile fabric of claim 1, wherein the textile fibers comprise one or more type of reinforcing fibers selected from the group consisting of aramid fibers, carbon fibers, glass fibers, mineral fibers, high-strength polyester fibers, high-strength polyamide fibers, and metal fibers.

7. The textile fabric of claim 1, wherein the starch comprises at least one vegetable starch selected from the group consisting of potatoes, manioc, arrowroot, batata, wheat, maize, rye, rice, barley, millet, oat, sorghum, chestnuts, acorns, beans, peas, and bananas.

8. The textile fabric of claim 1, wherein the starch comprises a mixture of amylose and amylopectin, and has a molecular weight M.sub.w between 5×10.sup.4 and 1×10.sup.7.

9. The textile fabric of claim 1, wherein the binder system further comprises one or more emulgators.

10. The textile fabric of claim 9, wherein the emulgators are selected from the group consisting of polyalkylene glycol, sulfonated parafinic hydrocarbons, alkyl sulphates, and alkaline metallic salts of fatty acids.

11. The textile fabric of claim 1, wherein the binder system further comprises one or more additives selected from the group consisting of a preservative, a stabilizer, an antioxidant, an antifoaming agent, a waterproofing agent, a UV stabilizer, a filler, and a pigment.

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

13. An article comprising: a fiber-containing textile fabric; and a binder to solidify the textile fabric, wherein the binder is formed from a binder system comprising an aqueous dispersion of: starch; and emulsion polymers, wherein the binder system has 5 wt. % or less of ethylenically unsaturated carboxylic acids based on the weight of the binder system.

14. The article of claim 13, wherein the binder system has 3 wt. % or less of the ethylenically unsaturated carboxylic acids based on the weight of the binder system.

15. The article of claim 13, wherein the article has a heat dimensional stability of at most 1.6% in a longitudinal direction and at most 1.7% in a cross direction.

16. The article of claim 13, wherein the article is selected from the group consisting of a sarking membrane, a roofing membrane, and a sealing membrane.

17. The article of claim 16, wherein the article is a bituminized roofing membrane.

18. The article of claim 13, wherein the article further comprises a granular material on at least one surface of the article.

19. A textile fabric which has been bonded with a binder system, the binder system comprising: 10 to 90 wt % (dry mass) of an aqueous anionic dispersion of polymerisates based on conjugated aliphatic dienes and vinyl aromatic compounds, 10 to 90 wt % (dry mass) starch, and 0 to 10 wt % (dry mass) additives, wherein said fabric is a spunbonded nonwoven based on partially aromatic or fully aromatic polyesters.

20. The textile fabric according to claim 19, wherein the aqueous dispersion has 5 wt. % or less of ethylenically unsaturated carboxylic acids based on the weight of the binder system.

Description

EXAMPLES

[0131] 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.

[0132] 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.

[0133] 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 dispersion 90 40 starch 60 60 100 Set application (% weight of 20 20 20 20 20 raw non-woven) [%] Maximum longitudinal tensile 56 59 57 51 46 force [daN/5 cm] Maximum longitudinal tensile 25 19 27 n.t. 31 force, hot [daN/5 cm] Maximum cross tensile force 47 48 45 36 36 [daN/5 cm] 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