Waste PET composite material

[0035] A waste PET composite material, raw materials include: waste PET with a crushing particle size of 1-10 cm, waste resin powder of 40-100 mesh, silane coupling agent and polyolefin elastomer (POE), the preparation process is as follows:

[0036] 1) Mix the silane coupling agent and waste resin powder at a mass ratio of 1 to 10:100, and dry to obtain silanized waste resin powder;

[0037] 2) Weigh the waste PET and dry it, and mix the waste PET with the silanized waste resin powder and polyolefin elastomer obtained in step 1) to obtain a mixture, wherein the mass ratio of PET to waste resin powder is 5-9:1 -5, the amount of polyolefin elastomer added accounts for 1% to 20% of the mass of the mixture;

[0038] 3) The mixture is extruded and granulated through a twin-screw extruder. The temperature of the barrel of the extruder is 235-260°C, the temperature of the die head is 240-265°C, the speed of the main engine is 150-180r / min, and the feeding speed is about 10-25 r / mi

[0049] Improvements were made on the basis of Example 1, wherein the mass ratio of waste resin powder: POE: waste PET was limited to 1:1:8, and composite material 1 was obtained. After testing, the impact strength of composite material 1 increased by 3.4% compared with waste PET, see image 3 . Its elongation at break, flexural strength, tensile strength see Figure 4 , 5 6.

[0051] Improvements were made on the basis of Example 2, wherein the mass ratio of waste resin powder: POE: waste PET was limited to 1:1.5:7.5, and composite material 2 was obtained. After testing, the impact strength of composite material 2 increased by 14% compared with waste PET, see image 3 . After testing, the elongation at break, bending strength, and tensile strength of this embodiment are also within reasonable ranges, and this embodiment is the most preferred embodiment after comprehensive evaluation. Its elongation at break, flexural strength, tensile strength see Figure 4 , 5 6.