描述

用于PMMA塑料光学透镜的原始PMMA材料

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塑料光学透镜用PMMA原材料

产品详细信息

用于PMMA塑料光学透镜的PMMA原材料

主要性能：

1。力学性能聚甲基丙烯酸甲酯具有良好的综合力学性能，在通用塑料中处于领先地位

2。PMMA的拉伸强度可达50-77mpa，弯曲强度可达90-130mpa。其断裂伸长率仅为2%-3%，因此其机械性能基本上为硬脆塑性，具有缺口敏感性

3。在应力作用下容易破裂，但破裂不像聚苯乙烯和普通玻璃那样尖锐和不均匀。40℃是二级转变温度，相当于甲基开始移动的温度。当温度超过40℃时，材料的韧性和延展性得到提高。聚甲基丙烯酸甲酯的表面硬度低，容易划伤

4。甲基的极性不是很大，PMMA仍然具有良好的介电和电绝缘性能。值得指出的是，聚甲基丙烯酸甲酯和整个丙烯酸塑料具有优异的耐电弧性能。在电弧的作用下，表面不会有碳化的导电路径和电弧轨迹

主要工艺特点如下：

1）注塑机的模具夹紧力要求足够大。光学透镜的加工不需要注射成型机的快速注射速度。它只要求机器能够提供稳定且缓慢的注射速度，并且能够提供足够高的注射压力和稳定的持续保持压力

2）。加工周期长是其特点之一。因此，它通常配备可变泵或全电机

3）。模具必须有深度小于0.03mm的排气槽，以排出模腔中的空气和熔体中挥发的气体，防止出现气穴，影响产品的透明度

应用：

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Virgin PMMA Material For PMMA Plastic Optical Lens

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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.

Virgin PMMA Material For PMMA Plastic Optical Lens

Product Details

Virgin PMMA Material For PMMA Plastic optical lens

Main Properties:

1. Mechanical properties-Polymethyl methacrylate has good comprehensive mechanical properties and is in the forefront of general plastics

2. The tensile strength of PMMA can reach 50-77mpa, and the bending strength can reach 90-130mpa. Its elongation at break is only 2%-3%, so its mechanical properties are basically hard and brittle plastic with notch sensitivity.

3. It is easy to crack under stress, but the fracture is not as sharp and uneven as polystyrene and ordinary glass. 40 ℃ is a second-order transition temperature, which is equivalent to the temperature at which side methyl begins to move. When the temperature is over 40 ℃, the toughness and ductility of the material are improved. The surface hardness of polymethylmethacrylate is low and easy to scratch.

4. The polarity of the methyl group is not very large, and PMMA still has good dielectric and electrical insulation properties. It is worth pointing out that polymethyl methacrylate and the whole acrylic plastics have excellent arc resistance. Under the action of electric arc, there will be no carbonized conductive path and arc track on the surface.

The main process characteristics are as follows:

1) The mold clamping force of the injection molding machine is required to be sufficient. The processing of optical lenses does not require a fast injection speed of the injection molding machine. It only requires that the machine can provide a stable and slow injection speed, and can provide a sufficiently high injection pressure and a stable continuous holding pressure.

2). Long processing cycle is one of its characteristics. Therefore, it is generally equipped with variable pumps or full motors.

3). The mold must be provided with an exhaust groove with a depth of less than 0.03mm to expel the air in the mold cavity and the gas volatilized from the melt, to prevent the appearance of air pockets and affect the transparency of the product.

Application: