旭化成(AsahiKASEI)
,1931年4月,日本铜氨丝株式会社开始使用氨生产铜氨丝纤维。同年5月,正式成立了延冈氨纺织株式会社,这就是旭化成正式成立的日子。
第一个发展的十年是通过扩大工业化学品和衍生品如苛性钠、氯、化肥、硝化纤维、工业炸药、铜氨丝、以及粘胶长丝(粘胶长丝的生产于2001年9月结束)的生产来实现的。第二次世界大战后的几年,旭化成开始扩展到更广阔的新领域,并发展成为日本化工业Zui前端的企业。
POM 9520旭化成详情-- POM聚甲醛#赛钢9520日本旭化成, 用途: 电动工具 ,特性备注:共聚物,一般用途,高流动, 重要参数: 熔体流动速率:70 g/10min 密度:1.41 g/cm3 吸水率:0.2 % 成型收缩率:1.8 % 缺口冲击强度:39 拉伸强度:61 MPa 断裂伸长率:40 % 弯曲强度:90 MPa 弯曲模量:2630 MPa 热变形温度:110 ℃ , 生产厂商:日本旭化成工业株式会社
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。
Polyformaldehyde is a kind of solid formaldehyde with high formaldehyde content, which is granular and easy to store and transport. Formaldehyde vapor can be converted into formaldehyde vapor at higher temperature, which can easily replace high concentration of formaldehyde to participate in various reactions. It is conducive to chemical synthesis, pharmaceuticals and other industrial applications, especially in the synthesis of anhydrous formaldehyde, which is widely used. There are mainly the following aspects: (1) pesticides: synthesis of acetochlor, Butachlor and glyphosate; (2) coatings: synthesis of high-grade automotive paint; (3) resins: synthesis of urea-formaldehyde resin, phenolic resin, polyacetal resin, melamine resin, ion exchange resin and various adhesives; (4) papermaking: synthesis of paper enhancers; (4) synthesis of paper enhancers; (3) synthesis of urea-formaldehyde resin, phenolic resin 5) Foundry: sand-turning defilm agent, synthetic casting adhesives; (6) aquaculture: fumigation disinfectant. (7) Organic raw materials: used to prepare pentaerythritol, trimethylolpropane, glycerol, acrylic acid, methyl acrylate, methacrylic acid, N-hydroxymethyl acrylamide, alkyl phenol, methyl vinyl ketone, etc. (8) Other: medicine and disinfection.