描述

PMMA改性阻燃剂

PMMA塑料材料

优良的透明度和优异的耐老化性

PMMA具有重量轻、成本低、易于成型的优点

PMMA改性阻燃剂

产品详细信息

PMMA改性阻燃剂

<1）工艺特点

1聚甲基丙烯酸甲酯含有极性侧甲基基团，具有明显的吸湿性，吸水率一般为0.3%-0.4%。成型前必须干燥

干燥条件为80C-85C，持续4_5h

2。聚甲基丙烯酸甲酯在成型加工温度范围内具有明显的非牛顿流体特性，熔体粘度随剪切速率的增加而增加

显著降低，熔体粘度对温度变化也非常敏感。因此，对于聚甲基丙烯酸甲酯的成型过程，增加成型压力和

温度可以显著降低熔体粘度，获得更好的流动性

3。聚甲基丙烯酸甲酯开始流动的温度约为160摄氏度，开始分解的温度高于270摄氏度，加工温度范围较宽

4。聚甲基丙烯酸甲酯具有较高的熔体粘度和较快的冷却速度，且产品容易产生内应力，因此在成型过程中控制工艺条件

要求严格，产品成型后也需要进行后处理

5聚甲基丙烯酸甲酯是一种无定形聚合物，收缩率及其变化范围小，一般在0.5%-0.8%左右，有利于成型

尺寸精度高的塑料零件

6。聚甲基丙烯酸甲酯的切削性能非常好，其外形可以很容易地加工成各种需要的尺寸

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PMMA Modified Flame Retardant

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PMMA Plastic Material
Excellent transparency and outstanding aging resistance
PMMA has the advantages of light weight, low cost and easy molding.

PMMA Modified Flame Retardant

Product Details

PMMA modified flame retardant

(1) Process characteristics

1 Polymethyl methacrylate contains polar side methyl groups, which has obvious hygroscopicity, and the water absorption rate is generally 0.3%-0.4%. It must be dried before molding.

The drying condition is 80C-85C for 4_5h.

2. Polymethyl methacrylate has obvious non-Newtonian fluid characteristics in the temperature range of molding processing, and the melt viscosity will increase with the increase of shear rate.

Significantly lower, melt viscosity is also very sensitive to temperature changes. Therefore, for the molding process of polymethyl methacrylate, increase the molding pressure and

Temperature can significantly reduce the melt viscosity and achieve better fluidity.

3. The temperature at which polymethyl methacrylate starts to flow is about 160C, and the temperature at which it starts to decompose is higher than 270C, which has a wide processing temperature range.

4. Polymethyl methacrylate has higher melt viscosity and faster cooling rate, and the product is prone to internal stress, so the process conditions are controlled during molding

The requirements are strict, and post-processing is also required after the product is formed.

5 Polymethyl methacrylate is an amorphous polymer, the shrinkage rate and its variation range are small, generally about 0.5%-0.8%, which is conducive to molding.

Plastic parts with high dimensional accuracy.

6. The cutting performance of polymethyl methacrylate is very good, and its profile can be easily machined to various required sizes.

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