描述

改性聚甲醛树脂

1）聚甲醛20%玻璃纤维，具有优异的机械强度

2）POM 20%玻璃纤维，用于承载高硬度强度

3）POM 20%玻璃纤维，具有高耐磨性

4）轴承自润滑用POM 20%玻璃纤维

5）POM 20%玻璃纤维，用于承载更高的模量

6）POM 20%玻璃纤维，用于耐化学腐蚀等。

改性聚甲醛树脂

产品细节

改性聚甲醛树脂

聚甲醛塑料原材料的工艺特点

A.聚甲醛塑料的吸湿率非常小，因此基本上不需要像其他普通工程塑料那样在加工前进行干燥

最重要的是在加工过程中将其预热到一定的温度，这对产品的尺寸稳定性非常有利

B.聚甲醛塑料的加工温度范围很窄，如果在桶中停留太久或加工温度为120摄氏度时，会导致分解并产生刺激性甲醛气体

C.POM塑料注塑时，要求其保压压力大，基本接近注塑压力，以减少一定的压降，螺杆转速不宜过高，残留量应小

D.POM塑料制品的收缩率相对较大，因此容易收缩或变形。同时，POM塑料的比热较大，模具的温度相对较高，约800摄氏度至1000摄氏度，所以产品脱模时非常热，尤其是为了防止手指被烫伤

E.POM塑料原材料更适合在中压、中速、低材料温度和高模具温度的组合下成型，如果是更精密的产品，成型时需要严格控制模具温度

F.当注射POM塑料时，我们通常使用中速，这稍微太快，因为如果速度太慢，产品会起皱，如果速度太快，会产生波纹和剪切过热，所需速度选择中速太快

G.如果处理设备没有溶胶保留点，则应注意，在注射温度下，熔体不能在桶中停留20分钟。如果机器关闭，机筒温度可以降低到150摄氏度10摄氏度，如果你想长时间停止，那么你必须清洁线轴并关闭加热器

H.对于使用温度极高且质量要求高的产品，需要进行热处理和退火处理。产品可在浓度为30%的盐酸溶液中浸泡30分钟进行检查，然后用肉眼进行判断。是否存在残余应力裂纹

是一家专业的改性聚甲醛树脂制造商，您可以从我们工厂以优惠的价格订购高品质的改性聚甲醛树脂

Modified POM Resin

1)POM 20% Glass Fiber for Bearing Excellent mechanical strength;
2)POM 20% Glass Fiber for Bearing High hardness strength;
3)POM 20% Glass Fiber for Bearing High wear resistance;
4)POM 20% Glass Fiber for Bearing Self-lubrication;
5)POM 20% Glass Fiber for Bearing Higher modulus;
6)POM 20% Glass Fiber for Bearing Chemical resistance and etc.

Modified POM Resin

Product Details

Modified POM Resin

Process characteristics of POM plastic raw materials

A. The moisture absorption rate of POM plastic is very small, so basically it is not necessary to dry it like other ordinary engineering plastics before processing.

The most important thing is to preheat it at a certain temperature during processing, which is very beneficial to the dimensional stability of the product.

B. The processing temperature range of POM plastic is very narrow, so if it stays in the barrel for a little too long or when the processing temperature is 120 degrees Celsius, it will cause decomposition and produce irritating formaldehyde gas.

C. When POM plastics are injection-molded, its holding pressure is required to be large, basically close to the injection pressure, so as to reduce a certain pressure drop, and the speed of the screw should not be too high, and the residual amount should be small.

D. Products made of POM plastic have a relatively large shrinkage rate, so it is easy to shrink or deform. At the same time, the specific heat of POM plastic is large, and the temperature of the mold is relatively high, about 800 degrees Celsius to 1,000 degrees Celsius, so The product is very hot when demoulding, especially to prevent fingers from being scalded.

E. POM plastic raw materials are more suitable for molding under a combination of medium pressure, medium speed, low material temperature, and high mold temperature, and if it is a more precise product, when molding Strict control of mold temperature is required.

F. When injecting POM plastics, we usually use medium speed, which is slightly too fast, because if the speed is too slow, the product will be corrugated, and if it is too fast, it will produce ripples and shear overheating. , the desired speed selects the medium speed to be too fast.

G. If the processing equipment does not have a sol retention point, then it should be noted that at the injection temperature, the melt cannot stay in the barrel for 20 minutes. If the machine is shut down, the barrel temperature can be reduced to 150 Ten degrees Celsius, if you want to stop for a long time, then you must clean the bobbin and turn off the heater.

H. For the products used at very high temperature and the quality requirements are high, heat treatment and annealing treatment are required. The products can be immersed in a hydrochloric acid solution with a concentration of 30% for 30 minutes to check, and then judge with the naked eye. Whether there are residual stress cracks.

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