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A kind of stress whitening resistant polyethylene terephthalate resin and preparation method thereof

A technology of polyethylene terephthalate and trimethylene phthalate, which is applied in the field of polyethylene terephthalate resin and its preparation, can solve the problem of poor stress cracking resistance, affecting product use, Elongation reduction and other problems, to prevent stress whitening, high production efficiency, and stable product quality

Active Publication Date: 2021-04-09
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stress whitening of the product not only affects its appearance, but also leads to product breakage, reduced elongation, reduced strength, and poor stress cracking resistance, which seriously affects the use of the product

Method used

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  • A kind of stress whitening resistant polyethylene terephthalate resin and preparation method thereof
  • A kind of stress whitening resistant polyethylene terephthalate resin and preparation method thereof
  • A kind of stress whitening resistant polyethylene terephthalate resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 85 parts of PET resin, 15 parts of superfine silicon carbide (6000 mesh), 5 parts of glass fiber, 2 parts of polytrimethylene terephthalate, 0.3 part of light and heat stabilizer (antioxidant 1076: antioxidant 168=1:2, mass ratio) and 0.1 part of lubricant stearic acid amide (SR) are mixed evenly by high-speed stirring;

[0039] (2) sending the above-mentioned mixture into a twin-screw extruder to extrude and granulate to obtain PET resin;

[0040] In the step (2), the screw temperature of the twin-screw extruder is 210° C., and the screw speed is 400 r / min.

[0041] The prepared compound was injection-molded into a standard sample bar for testing according to the standard size, and the performance test results are shown in Table 2.

Embodiment 2

[0043] (1) 98 parts of PET, 2 parts of superfine silicon carbide (7000 mesh), 10 parts of glass fiber, 5 parts of polytrimethylene terephthalate, 0.6 parts of light and heat stabilizer (DLTP:DBTL=1:1, mass Ratio) and 0.5 parts of lubricant silicone oil are mixed evenly by high-speed stirring;

[0044] (2) sending the above-mentioned mixture into a twin-screw extruder to extrude and granulate to obtain PET resin;

[0045] In the step (2), the screw temperature of the twin-screw extruder is 230° C., and the screw speed is 500 r / min.

[0046] The prepared compound was injection-molded into a standard sample bar for testing according to the standard size, and the performance test results are shown in Table 2.

Embodiment 3

[0048] (1) 90 parts of PET resin, 10 parts of superfine silicon carbide (7000 mesh), 30 parts of glass fiber, 10 parts of polytrimethylene terephthalate, 0.1 part of light and heat stabilizer (DLTP: BHT = 2: 1, Mass ratio) and 1 part of lubricant EBS are mixed evenly by high-speed stirring;

[0049] (2) sending the above-mentioned mixture into a twin-screw extruder to extrude and granulate to obtain PET resin;

[0050] In the step (2), the screw temperature of the twin-screw extruder is 200° C., and the screw speed is 300 r / min.

[0051] The prepared compound was injection-molded into a standard sample bar for testing according to the standard size, and the performance test results are shown in Table 2.

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Abstract

The invention belongs to the technical field of polymer materials, and in particular relates to a stress-whitening-resistant polyethylene terephthalate resin and a preparation method thereof, comprising 80-98 parts of polyethylene terephthalate resin, carbonized 2-20 parts of silicon, 5-30 parts of glass fiber, 2-10 parts of polytrimethylene terephthalate, 0.1-1 part of light and heat stabilizer, and 0.1-1 part of lubricant. The material has the characteristics of excellent performance and good processing and molding. The key point is that the preparation method of the material is simple and the production efficiency is high. At the same time, it can be used in occasions that are often subjected to external forces, which can effectively reduce and avoid the occurrence of stress whitening, and expand the use of PET resin materials. application field.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a stress-whitening-resistant polyethylene terephthalate resin and a preparation method thereof. Background technique [0002] At present, polyethylene terephthalate (PET) resin is a very commonly used polymer material with a wide range of applications, but its products often suffer from external forces such as stretching, bending, and impact during use. Partial whitening occurs, which is what we call stress whitening. Stress whitening of the product not only affects its appearance, but also leads to product breakage, reduced elongation, reduced strength, and poor stress cracking resistance, which seriously affects the use of the product. At present, the most common solution to the stress whitening of PET resin products is to heat-treat the products, that is, to place the products under certain temperature conditions for post-treatment to eliminate their int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08K3/34B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08L67/02C08L2205/025C08L2205/03C08L2205/035C08K13/04C08K7/14C08K3/34
Inventor 杨桂生李晓庆乐俊孙欢欢
Owner HEFEI GENIUS NEW MATERIALS
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