Currently used for the recovery of pvc there are three main technologies: First, physical recycling; Second, the comprehensive utilization of chemical recovery method; Third, by recycling pvc materials and the use of energy which physical and chemical comprehensive utilization of the method is worthy of praise , They can recycle waste products, give full play to the use of materials.
Physical recovery method
Physical Recycling means that the recycling of pvc waste is done only by mechanical treatment, mainly by shredding, screening, grinding and other processes, to produce films, powders, pellets or other forms of recycled materials that can be used to produce heavy bags, Agricultural pipes and soles.
pvc plastic products are divided into two kinds of soft products and hard products. Soft products mainly include film, cable sheath, plastic shoes and leather products; hard products include bottles, pipes, profiles, plates.
In soft products, agricultural film is a larger amount of use.Agricultural film manufacturing materials pvc, pe, eva and other materials.Recycling and recycling, the pvc film and other materials should be the first film to distinguish Agricultural film often entrained with soil, gravel, grass roots and nails, etc., to remove these impurities and cleaning, and then dried, chopped and other processes made of debris or pellets, and then made into agricultural products packaging film, agricultural regeneration Water pipes and soles, etc .. As the repeated recycling of agricultural waste pvc film was heated several times and mechanical processing, will inevitably produce partial degradation, the intensity decreases. To ensure product quality, the need to add some new pvc resin and The corresponding additives.If you want to make the reclaimed material through intensive, two rollers, four-roll machine made of two plastic films, in the mixing process by adding different colors, the calendered film will be produced Different colors. In addition, the plasticizer (mainly dop) remaining in the pvc film of agricultural waste, about 30% can be recovered, purified and reused.