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What are the characteristics and uses of pp recycled particles?
After the waste plastic is processed into recycled plastic granules, it only changes its appearance and shape, its chemical properties have not changed, and it still has good comprehensive material properties, which can meet the technical requirements of blown film, wire drawing, drawing tube, injection molding and extrusion profiles. A large number of applications in the production of plastic products. PP recycled pellets can be used for wire drawing, injection molding, and can also be used for pipes. PVC is used for pipes, bicycles, motorcycle handles, sole materials, etc. ABS granulation is used for electrical appliances, toys, and other alloy materials such as PC/ABS can be used for mobile phone casings. The following China Plastics Network - Jiuzhi Plastics Network takes everyone to look at the characteristics and uses of pp recycled particles, as follows:
Characteristics of pp recycled particles:
Pp regenerated propylene is a non-toxic, odorless, odorless milky white crystalline polymer with high crystallinity and regular structure, so it has excellent mechanical properties, and its yield, tensile strength, compressive strength, hardness and elasticity are higher than HDPE. Its melting point is 164 ~ 170 degrees, the product can be sterilized at temperatures above 100 degrees, the chemical stability of polypropylene is very good, in addition to being able to be eroded by concentrated nitric acid, it is relatively stable to other chemical reagents. Processing methods: injection molding, extrusion molding, hollow molding, and rotational molding.
The use of pp recycled particles mainly has the following four aspects:
1. Remanufactured PET bottles, recycled pellets can not be used for direct contact with food, but can be used in the middle layer of three-layer PET bottles, and then made into carbonated beverage bottles.
2, spinning to make fibers, recycled PET materials can be used to spin into fibers, used as pillows, tweezers, sleeping bags and so on.
3, glass fiber reinforced materials, glass fiber reinforced recycled PET has good heat resistance and mechanical strength, can be used to make automotive parts, such as heat-resistant car wheel cover, its thermal distortion temperature can reach 240 degrees. The elastic modulus of deformation is 9500 MPa, the bending strength is 214 MPa, and the impact strength is 15 kf/m2.
4. Blending and modifying, the recycled PET material can be blended with other polymers to obtain various modified materials. For example, blending with PE can obtain PET blend with improved impact performance, and PE: PET is (10). ~50): (90~50): If a small amount of polypropylene is added, the dimensional stability of the blend can be significantly improved. Since the polarities of PE and PET are quite different, compatibility treatment is required during blending, and the compatibility is generally improved by graft modification of polyolefin.