PPR的熔點(diǎn)在260℃,孝感PVC管業(yè),所以要把熱熔器加熱到260℃,指示燈亮后,將管材和管件同時(shí)推進(jìn)模頭內(nèi)加熱。注意:這里要把握時(shí)間的分寸,加熱過(guò)短,受熱不充分:加熱過(guò)長(zhǎng),會(huì)導(dǎo)致管件塌陷。管材管件從熔接器上取出,迅速、平穩(wěn)、無(wú)旋轉(zhuǎn)地插入到位。注意:連接時(shí)間過(guò)長(zhǎng),會(huì)導(dǎo)致連接強(qiáng)度不足或連接不到位。熔接后要冷卻一會(huì)。注意:在沒(méi)有充分冷卻前,應(yīng)避免受扭、受彎和受拉。
無(wú)論是PPR冷水管,PPR熱水管還是PPR管件,同一廠家原料和配方都是一樣的,只有同原料同配方才能保證熱熔時(shí)可靠。
Whether it is PPR cold water pipe,PVC管業(yè), PPR hot water pipe or PPR pipe fittings, the same manufacturer"s raw materials and formula are the same. only the same raw materials and formula can ensure the safety and reliability of hot melting.
PPR管為什么會(huì)有低溫脆性的特點(diǎn)?它是由單體和少量乙烯單體在加熱、加壓和催化劑作用下無(wú)規(guī)共聚得到的。乙烯單體隨機(jī)地分布到長(zhǎng)鏈中,PVC管業(yè)電話,其中乙烯單體一般控制在3-5%之間。乙烯含量和乙烯與的聚合方式?jīng)Q定了其具有低溫脆性的特點(diǎn)。
Why does PPR pipe have the characteristics of low temperature brittleness? It is obtained by random copolymerization of mo
nomer and a small amount of ethylene mo
nomer under heating, pressure and catalyst. Ethylene mo
nomer is randomly distributed in long chain, and ethylene mo
nomer is generally co
ntrolled between 3-5%. The co
ntent of ethylene and the polymerization of ethylene determine its low temperature brittleness.
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