POM GM-20宝理
更新时间:2024-06-12 16:58:52 信息编号:5848696 发布者IP:59.63.224.246 浏览:34次![](http://img.11467.com/2020/07-24/3888236991.jpg)
- 供应商
- 东莞市晶宏塑胶原料有限公司 商铺
- 认证
- 资质核验:已通过营业执照认证入驻顺企:第7年主体名称:东莞市晶宏塑胶原料有限公司组织机构代码:91441900MA5152YX6E
- 报价
- 请来电询价
- 生产厂商
- 日本宝理
- 牌号
- GM-20
- 特性
- 玻纤20%增强,低翘曲
- 关键词
- GM-20
- 所在地
- 东莞市樟木头镇百果洞百顺小区三巷5号一楼(注册地址)
- 联系电话
- 18200646066
- 手机号
- 18200646066
- 微信号
- 18200646066
- 经理
- 蒋珂 请说明来自顺企网,优惠更多
产品详细介绍
POM GM-20宝理--GM-20 is a polyformaldehyde (POM) copolymer product containing 20% glass fiber reinforced filler.
因为干燥处理可提高制品的表面光泽度,减少模垢、气痕等不良现象出现。而对开封并放置一定时间的POM料,会有一定的吸湿,所以必须经干燥后再用于成型,否则会在注射成型中产生较多的模垢,或者因产生银纹而使制品的外观不良。对POM进行注射成型时,为了达到较好的制品外观和减少成型时的模垢,要求其原料的含水率不超过0.1%。较高的干燥温度虽能使树脂烘干所需的时间大为缩短,但因过高的温度易使POM制品表面氧化变黄,所以采用较温和的干燥条件。均聚POM可采用的干燥温度为80~90℃,干燥时间为2~4h。共聚POM可采用干燥温度为90~100℃,干燥时间为2~4h。在干燥上的区别是因为共聚甲醛的吸湿率低于均聚甲醛,且热稳定性要好,所以采用高温烘烤。
When POM plastic material is processed, the temperature of barrel
is too high, the thermal stability of POM is poor, the temperature
is too high or the time is too long, all of which will cause
decomposition, resulting in the decline of product performance,
especially when the temperature exceeds 250 C, the decomposition
speed will be accelerated, and the formaldehyde gas which strongly
stimulates the eyes will spill over. In serious cases, the product
will produce bubbles or discoloration. Moreover, because POM is a
shear-sensitive polymer, the melt fluidity above melting point is
not obvious to temperature change, but sensitive to shear rate.
Therefore, the effect of improving the fluidity of POM only by
increasing the temperature of POM is limited. When forming
thin-walled products, it is generally recommended to use POM grade
with higher melt flow rate. The melting temperature of homopolymer
POM is 175 C. The temperature of resin can be set between 190 and
200 C, because the melting temperature of homopolymer POM should be
taken into account to set a higher temperature and to prevent its
thermal decomposition as much as possible. The melting temperature
of copolymer POM is 165 C. Because the processing window is
relatively wide, the resin temperature can be set at 180 ~ 200 C in
injection moulding.
Resin Description: Whether homopolymer POM or copolymer POM, when
moulding thin-walled or multi-cavity moulding products, faster
injection speed should be adopted. This is because the injection
moulding of such parts requires the system to have good fluidity.
As mentioned earlier, POM melt belongs to shear-sensitive polymer.
To increase its flowability, it can be achieved by increasing
injection speed. At the same time, in the above applications, the
cooling rate of POM crystallization will be very fast, and surface
defects such as wrinkles, speckles and weld marks will easily occur
on the products. Therefore, it is necessary to improve the
injection speed
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