人人爽人人爽人人爽人人片av_色欲AV伊人久久大香线蕉影院_欧美裸体ⅩXXXXBBBBB_玩两个丰满老熟女

廣東電木廠制作電木板的材料有哪些?

2021-10-04 772

  電(dian)(dian)木(mu)板的組成(cheng)是由漂白木(mu)槳(jiang)紙浸以酚醛(quan)(quan)(quan)(quan)樹(shu)(shu)脂脂熱壓而成(cheng)的酚醛(quan)(quan)(quan)(quan)層壓紙板。電(dian)(dian)木(mu)的化學(xue)名稱叫酚醛(quan)(quan)(quan)(quan)塑料。酚類(lei)和(he)(he)醛(quan)(quan)(quan)(quan)類(lei)化合物(wu)在酸性或堿(jian)性催(cui)化劑(ji)起到下,經縮聚反應可制得酚醛(quan)(quan)(quan)(quan)樹(shu)(shu)脂。廣東電(dian)(dian)木(mu)廠將酚醛(quan)(quan)(quan)(quan)樹(shu)(shu)脂和(he)(he)鋸木(mu)粉、滑(hua)石粉(填料)、烏(wu)洛托品(固(gu)化劑(ji)),硬脂酸(潤滑(hua)劑(ji))、顏料等(deng)充份混合,并(bing)在混煉(lian)機中(zhong)冷卻混煉(lian),即得電(dian)(dian)木(mu)粉。將電(dian)(dian)木(mu)粉在模具中(zhong)冷卻壓制成(cheng)型后(hou)獲得熱固(gu)性酚醛(quan)(quan)(quan)(quan)塑料制品。

  酚醛(quan)樹脂(zhi)的(de)(de)(de)缺(que)陷(xian)是機(ji)械(xie)(xie)性(xing)能(neng)較好,也不耐油和(he)化(hua)學生銹,為(wei)了(le)解決上(shang)述缺(que)失,人們對酚醛(quan)樹脂(zhi)展開了(le)改性(xing),在酚醛(quan)樹脂(zhi)中重(zhong)新(xin)(xin)加(jia)入(ru)有所(suo)不同的(de)(de)(de)填(tian)料(liao)(liao)可獲(huo)得功用(yong)各異的(de)(de)(de)改性(xing)酚醛(quan)塑(su)料(liao)(liao),如(ru)在配料(liao)(liao)中重(zhong)新(xin)(xin)加(jia)入(ru)石(shi)棉、云母,能(neng)減(jian)少它的(de)(de)(de)耐酸、耐堿、抗磨(mo)性(xing),可用(yong)于化(hua)工(gong)設備的(de)(de)(de)資料(liao)(liao)和(he)電機(ji)、轎(jiao)車的(de)(de)(de)配件;廣(guang)東電木廠(chang)重(zhong)新(xin)(xin)加(jia)入(ru)玻璃纖維(wei)能(neng)夠減(jian)少硬度(du),可用(yong)于機(ji)器零件等;用(yong)丁腈橡膠改性(xing)后(hou)耐油性(xing)能(neng)和(he)抗沖擊強度(du)大(da)大(da)提高(gao);用(yong)聚氯乙烯改性(xing)后(hou)則能(neng)提升機(ji)械(xie)(xie)強度(du)和(he)耐酸性(xing)。酚醛(quan)塑(su)料(liao)(liao)因為(wei)原(yuan)料(liao)(liao)來源十分豐富(fu),制備工(gong)藝十分簡單(dan),價格便宜,產(chan)品(pin)又具有優良的(de)(de)(de)性(xing)能(neng),現在仍然是世界上(shang)產(chan)量僅次于的(de)(de)(de)熱(re)固性(xing)塑(su)料(liao)(liao)。

廣東電木廠

  電(dian)木板表面(mian)柔軟(ruan),質脆(cui)堅固,擊(ji)打有木板聲(sheng),多為(wei)不半透(tou)明深色(se)(棕色(se)或黑色(se)),在熱水中(zhong)恒定(ding)軟(ruan)。是絕(jue)緣體,它(ta)的主要成分是酚醛(quan)樹酯。適用于(yu)PCB鉆孔,硅橡膠模具(ju)。治具(ju),配電(dian)盤(pan),電(dian)器(qi)機(ji)械零件(jian)。使(shi)用適用于(yu)機(ji)械性能要求較高的電(dian)機(ji)、電(dian)器(qi)設備中(zhong)和絕(jue)緣結構零部件(jian)。

      文章源自:廣東電木廠  //yxdycc.cn

推薦新聞(wen)