A kind of flame retardant reinforced PET with high mechanical properties and preparation method thereof
A technology of mechanics and performance, applied in the field of PET preparation, can solve problems such as casting, reducing mechanical properties, and PET structure damage
Active Publication Date: 2022-03-29
JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD +1
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Problems solved by technology
Although sodium benzoate and polyethylene glycol lowered the glass transition temperature T of PET g , to a certain extent, the crystallinity of PET is improved, but they have a decomposition effect on PET itself, damage the structure of PET, reduce its mechanical properties, and have casting problems in the injection molding process
Method used
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[0021] The technical solutions of the present invention will be further described and described below with reference to the specific embodiments.
[0022] The following ratios and embodiments include the following steps:
[0023] (1) Take each component according to the percentage of mass;
[0024] (2) Dry the PET resin and 7-14 μm of the diameter of 7-14 μm, dried in a blast dryer of 100 ° C, and the moisture content is less than 500 ppm;
[0025] (3) PET resin, flame retardant, nucleating agent, crystalline promoter, coupling agent, an antioxidant, and lubricant after step (2) are placed in a low speed mixer, and the premix is obtained.
[0026] (4) The premix obtained by step (3) is added to the main feed hopper of the twin screw extruder, and the alkali-free chip glass fibers processed after step (2) are added to the side feed, through the twin screw extruder. Melting blended extrusion, the extrusion temperature is 240-250 ° C, screw speed 300-400 r / min, that is, it is for...
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Abstract
The invention discloses a flame-retardant reinforced PET with high mechanical properties and a preparation method thereof, which is made of the following components in mass percentage: 45-70% of PET resin, 20-40% of alkali-free chopped glass fiber, and 10% of flame retardant ‑15%, nucleating agent 0.2‑0.8%, crystallization accelerator 0.2‑0.5%, coupling agent 0.2‑1%, antioxidant 0.2‑0.5% and lubricant 0.2‑1%. The present invention adds compound nucleating agent NA-95 and sodium ion type E / MMA copolymer 8920 as nucleating agent, combines the advantages of both, not only avoids the disadvantage of single nucleating agent, but also takes into account the various crystallization temperatures of PET The crystallization effect of the segment makes the prepared PET improved in all aspects.
Description
Technical field [0001] The present invention belongs to the field of PET preparation, and more particularly to a high mechanical properties flame retardant reinforced PET and its preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a high-molecular plastic with high toughness, creep resistance, good resistance resistance, high dielectric constant, has a small effect in temperature and humidity in the environment. Therefore, PET materials can be applied to many fields such as thin film sheets, packaging bottles, electronic appliances, auto parts, and machinery. PET needs to flame retardant reinforcement in the electrical electrical technology, but PET is a semi-crystalline polymer, which is a glass transition temperature T g Higher (about 78 ° C), the crystallization speed is slow, the molding cycle is long, resulting in a large shrinkage, poor dimensional stability, low thermal deformation temperature, is difficult to meet the design requi...
Claims
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IPC IPC(8): C08L67/02C08L63/00C08L25/06C08L33/12C08K13/04C08K7/14C08K3/22C08K5/03C08K5/00C08J5/04
CPCC08J5/043C08J2367/02C08J2463/00C08J2425/06C08J2433/12C08K2201/003C08K13/04C08K7/14C08K2003/2282C08K5/03C08K5/0083
Inventor 万锋杨杰戴李宗全敦华王伟陈明进陈国荣孙玉璞吴腾达刁雪峰申应军
Owner JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD