1.Recycling of PET bottles: PET bottles are widely used in carbonated drinks such as Coca-Cola, Pepsi-Cola and Sprite. At present, most of them are composed of PET bottles and HDPE bottle bottoms. The bottle cap is made of HDPE, and the trademark is BOPP film, which is stuck on the bottle body with EVA glue. The method of recycling polyester bottles is regeneration granulation. Alcoholysis and other methods. No matter which method is adopted, the polyester bottle should be separated from other bottles first, and the polyester bottle body should also be separated from the bottom of the bottle.

(1) separation: the mixed additional bottles enter the crusher through the conveyor belt for crushing, and then the density is separated.

② Regenerative granulation: Regenerative granulation can be done by an extruder. The separated PET chips are extruded by an extruder and granulated to make pellets. In order to avoid physical viscosity reduction due to water absorption during extrusion, they should be dried before extrusion. The uses of PET particles are as follows:

Then make PET bottles. The recovered particles can not be used for direct contact with food, but can be used for the middle layer of a three-layer PET bottle and then made into carbonated beverage bottles.

B. spinning to make fibers. Regenerated PET materials can be used for spinning into fibers, and can be used as pillow cores, mattresses, sleeping bags, blankets, etc.

C. Glass fiber reinforced material, recycled PET reinforced by glass fiber has good heat resistance and mechanical strength, and can be used to manufacture automobile parts, such as heat-resistant automobile wheel covers, and its thermal deformation temperature can reach 240 degrees. The flexural modulus is 9500MPa, the flexural strength is 2 14 MPa and the impact strength is 15kf/m2.

D.*** Mixed modification: The recycled PET material can be mixed with other polymers * * * to make various modified materials, such as mixed with PE***, to obtain a PET*** mixture with improved impact performance, and the ratio of PE to PET is (10 ~ 50): (90 ~ 50): if a small amount of polypropylene is added. Due to the great polarity difference between PE and PET, compatibility treatment is needed when mixing. Generally, the compatibility is improved by grafting modification of polyolefin.