4 major uses of PP plastic particles4 major uses of PP plastic particles
Do you know what pp plastic particles are? Today I will give you a detailed introduction to the characteristics and uses of pp plastic particles. PP plastic particles are non-toxic, odorless and tasteless milky white crystalline polymers with high crystallinity and regular structure. With its excellent characteristics and wide range of applications, its application has promoted the development of the plastic pellet market.
PP plastic particles have excellent mechanical properties, and their yield, tensile strength, compressive strength and hardness, and elasticity are higher than hdpe. Its melting point is 164-170 degrees, the products can be sterilized at temperatures above 100 degrees, and the chemical stability of polypropylene is very good. In addition to being corroded by concentrated nitric acid, it is relatively stable to other chemical reagents.
The main uses of PP plastic particles are as follows:
1. Re-manufacture pet bottles. The recycled pellets cannot be used in direct contact with food, but can be used in the middle layer of three-layer pet bottles to make carbonated beverage bottles.
2. Spinning to manufacture fibers, recycled pet materials can be used to spin to make fibers, used as pillows, mattresses, sleeping bags, felts, etc.
3. Glass fiber reinforced material, the glass fiber reinforced regenerated pet has good heat resistance and mechanical strength, and can be used to make auto parts, such as heat-resistant car wheel covers, and its thermal distortion temperature can reach 240 degrees. Modulus of elasticity 9500mpa, bending strength 214 mpa, impact strength 15kf/m2.
4. Blending modification, the regenerated pet material can be blended with other polymers to prepare various modified materials, such as blending with pe, can obtain a pet blend with improved impact performance, 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.
The above is the main purpose of pp plastic particles, it can be seen that the application of pp plastic particles is still relatively extensive.