POM 988P美国杜邦

POM 988P杜邦详情--Because the drying treatment can improve the surface gloss of the products, reduce the appearance of scale, gas marks and other undesirable phenomena. For POM material which is opened and placed for a certain period of time, it will absorb moisture, so it must be dried and then used for moulding. Otherwise, there will be more scale in injection moulding, or the appearance of products will be bad because of craze. When POM is injected, in order to achieve better product appearance and reduce scale, the moisture content of raw materials should not exceed 0.1%. Higher drying temperature can shorten the time required for resin drying, but because the surface of POM products is easily oxidized and yellowed by excessive temperature, it is better to adopt milder drying conditions. The drying temperature of homopolymer POM is 80 ~ 90 C and the drying time is 2 ~ 4 h

POM 988P杜邦--加工成型注意事项
(1) POM does not need to be dried before processing, and it is better to preheat it during the processing (about 80 C), which is good for the stability of product size.

(2) The processing temperature of POM is very narrow (0-215 C). When the residence time in barrel is slightly longer or the temperature exceeds 220 C.

It will decompose and produce a strong stimulating formaldehyde gas.

(3) The holding pressure of POM material is larger (similar to the injection pressure) in order to reduce the pressure drop. Screw speed not

Excessive capacity and less residue;

(4) The shrinkage rate of POM products is higher, and it is easy to shrink or deform. POM has high specific heat and die temperature (80 ~ 100 C). It is very hot when the product is demoulded. It is necessary to prevent finger scalding.

(5) POM should be processed under the conditions of "medium pressure, medium speed, low material temperature and high mould temperature", and precision products should be made.

The temperature of the control mode is needed for the type I.

POM的应用：
It can replace most non-ferrous metals, and can be used in automobiles, machine tools, instrumentation internals, bearings, fasteners, gears, spring sheets, pipes, belt accessories, electric cookers, pump shells, drainers, taps, etc.