Multi-layer textile sheet and method for its production

摘要

The multi-layer sheet material e.g. artificial leather comprises a textile substrate layer (5), a foamed layer (3) made of polyvinyl chloride containing plasticizer, a cover layer (2) made of polyvinyl chloride containing plasticizer, and a coating layer (1) facing outward on the cover layer. The polyvinyl chloride fraction in the cover layer is based to 95 wt.% on polyvinyl chloride that is produced according to the method of suspension polymerization (suspension polyvinyl chloride). The composition for the cover layer comprises calcium hydroxide stabilizer. The multi-layer sheet material e.g. artificial leather comprises a textile substrate layer (5), a foamed layer (3) made of polyvinyl chloride containing plasticizer, a cover layer (2) made of polyvinyl chloride containing plasticizer, and a coating layer (1) facing outward on the cover layer. The polyvinyl chloride fraction in the cover layer is based to 95 wt.% on polyvinyl chloride that is produced according to the method of suspension polymerization (suspension polyvinyl chloride). The composition for the cover layer comprises calcium hydroxide stabilizer and/or calcium/zinc stabilizer that contains 1-3 wt.% of calcium and 1-2 wt.% of zinc. The composition for the cover layer contains 2-6 phr of the calcium/zinc stabilizer and 3-10 phr of the calcium hydroxide stabilizer. The composition for the cover layer comprises sodium perchlorate as further stabilizer. The weight ratio of calcium plus zinc from the calcium/zinc stabilizer to the perchlorate in the composition for the cover layer is 1:1-1:6. The weight ratio of calcium hydroxide stabilizer to the perchlorate in the composition for the cover layer is 8:1-14:1. The plasticizers in the polyvinyl chloride layers are based on phthalate and/or trimellitate and have a molecular weight of 470 g/mole. An independent claim is included for a method for producing a multi-layer sheet material.