Properties And Feasibility Analysis Of Processing Leather Waste Collagen Fiber With Spun-Lace Method

China has a large leather industry. Leather products are very popular for its unique feel, breath ability and warmth to high-end qualities. It has dominate the market all year round. However, with the continuous improvement of people's consumption level and the increase of leather consumption, there are more and more scrap materials, faced with the problem of waste of leather processing. The collagen fiber used in this research is recycled from waste materials of leather tanning industry. Using physical and mechanical methods, ease fibers from the raw materials. This collagen fiber is a special one that we should study and analyze the characteristics and performances of it, then discover whether it has the feasibility of processing with spun-laced method. After arrange different product processes, study the parameters which will influence the entanglement properties of spun-laced materials. Through the analysis of the application properties just to explore the application of this material.This collagen fiber raw material is processing from scrap of leather industry. It has many advantages such as wide variety of sources of raw materials, environmental protection and sustainable development. In this paper, we tested the length of collagen fibers, linear density, moisture regain, and the orientation degree of crystallinity, mechanical properties and thermal properties were tested to analyze the characteristics of collagen fibers, in order to take full advantage of fiber characteristics to provide the basis for product development.Experiments show that:the moisture regain of the fiber is 7.1%, not far from natural cotton fiber, soybean protein fiber, it also has good moisture absorption; fiber breaking strength vary widely, uneven rate is 71.42%; fiber fracture Elongation irregularity has 25.46%; fiber fineness mainly concentrated in the 2-4um, the proportion accounted for about 70%; lum below and above the proportion of 9um almost close to 0, the fineness has a large discrete, the crystallinity is 25.93% and orientation degree was 68.5%. The thermal properties of collagen fiber is not very good, so the temperature of drying process should not exceed 110℃.This paper also discuss collagen fibers as raw materials of spunlace non-woven fabric production processes, from two aspect of making fiber web and spun-lace process, focusing on the spun-lace pressure, spun-lace channel number and transmission belt speed and the relationship between entanglement and products, introducing water injection energy, discuss the energy of the water needle entanglement properties of the relationship with the product. Analyze fiber entanglement mechanism by taken electron microscope photographs of products with different coefficients. Meanwhile, compared the entanglement mechanism of collagen fibers and polyester fibers mixed spun-laced non-woven materials and composite materials.Research shows that, increase spun-lace pressure and times, the tangles coefficient will also rises; Increase nets shade speed, tangles coefficient will reduce; Increase water-needle energy will also cause tangles coefficient increase. Collagen fibers and polyester fibers mixed spun-laced materials have higher tangles coefficient than collagen fibers and polyester fibers compound materials.Finally, compared the application properties of two different materials, which have two proportions of fiber web and different spun-lace process. The properties, including permeability and moisture absorption, the relationship between entangle coefficient and related properties. Comparing the pore size distribution of material with different entangle coefficient, explore the possibility of using this fabric as filtration material.Experiments show that, with the tangles coefficient increasing, the air permeability of two proportion non-woven materials is all declining, by contrast,80% collagen + 20% polyester collagen fiber non-woven fabric has better permeability. Along with the tangles coefficient increment, the absorption ability of two proportion non-woven materials is all declining, and 70% collagen + 30% polyester collagen fiber non-woven fabric is relatively better. In addition, as water-needle pressure increases, the proportion of aperture inside material increase, and has an even distribution.