Abstract:

In order to reduce the environmental pollution caused by waste textiles, improve recycling rate of waste textiles and maximize the utilization of resources, the recycled polyesters, recycled hemp fibers and the low melting point polyester staple fibers were used as raw materials to produce regenerated felt based materials by the mechanical carding and bot air bonding methods. The process was optimized by orthogonal test. The thickness, mass per unit area, grammes bulkiness, mechanical properties, thermal insulation and air permeability of the regenerated felt based materials were analyzed. The results show that the thickness of the regenerated felt based materials are ranged from 7 mm to 10 mm. The mass per unit area is from 300 to 450 g/m2. The bulkiness are 15 - 30 cm3/g, and the air permeability is 900 - 1 100 mm/s. The optimum process is: recycled hemp fibers/recycled polyester/low melting point polyester staple fiber with a mass ratio of 15:40:45, the temperature of 180?C, the heating time of 8 min and the pressure of 200 N. The regenerated felt based materials can be used as the substrate for automotive interiors and other functional materials.

Key words: waste textile, low melting point polyester staple fiber, mechanical carding, got air bonding, regenerated felt based material