How to use plastic waste to produce plastic shoe lasts
Polyethylene (PE) can be described as high pressure polyethylene (LDPE) and low pressure polyethylene (HDPE), as well as high and low pressure polyethylene. The polyethylene raw material is a milky white, non-toxic, odorless, surface-like gloss waxy particulate matter. Commonly used in packaging film, agricultural film, injection molding products, cable sheath, blow molding products, packaging boxes, turnover boxes, etc. Copolymer of ethylene and propylene, commonly used in food packaging or totes. Ethylene and butene copolymer, commonly used in the above raw materials, including degradable or non-degradable polyethylene, high, pressure polyethylene can be mixed, various colors can be mixed, no need to decolorize.
The recovered waste polyethylene should first be cleaned, degreased and dried. Conditional granulator can be granulated, unconditionally added to crush or cut, and then added to the injection molding machine hopper, the temperature of the injection molding machine should be: feeding section 150 ° C, intermediate section 170 ° C, head 200 ° C, making polyethylene After heating, the machine head is freely poured into the shoe last mold, and after being filled, it is placed in water of 20-50 ° C for cooling and setting for 2 hours. After cooling, the film is the blank of the plastic shoe last, and the blank is processed by the imitation tin to be the finished shoe last.
The shoe last is a mold in the production of shoes. The color of the recycled polyethylene does not affect the quality of the finished shoes. The recovered waste polyethylene can be used directly without adding any excipients. The cost of producing shoe lasts from waste polyethylene is: the cost of recycled polyethylene waste, cleaning, granulation, injection blanks, tin-bismuth type and other related costs. Each pair of shoe lasts weighs about 1.5-2 kilograms, and the finished men's and women's shoes are sold for 17-19 yuan, which is a considerable profit. China's existing footwear industry 3,665, the annual use of about 5 million pairs, the development prospects are very optimistic.
The use of waste polyethylene to produce shoe lasts can replace hibiscus and reduce deforestation resources. Plastic shoe lasts can be recycled at a discounted price. After crushing, new sputum can be processed twice, recycling, and white pollution resources can be realized. The use of waste polyethylene can also produce industrial material turnover boxes, packaging materials, agricultural fruit and vegetable turnover boxes and other products, which need further development and utilization.
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