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class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">塑料水箱廠家簡談聚乙烯（PE）塑料制品加工性能</h1> <div id="yaptwjdjyilo" class="NyNewsdetail_tips">更新時間：2016-11-26 點擊次數(shù)：1788</div> <div id="yaptwjdjyilo" class="NyNewsdetail_con" id="c_detail_wrap"> <p>　　pe塑料水箱廠家簡談聚乙烯(PE)塑料制品成型加工性能</p><p>　　塑料水箱廠家武漢諾順提示，PE水箱的成分主要是線性低密度聚乙烯LLDPE，聚乙烯的外文簡稱為PE，PE塑料水箱采用滾塑工藝成型。本廠出品的塑料儲水罐的材質(zhì)為滾塑料——線性低密度聚乙烯(LLDPE)，可以盛裝常溫下的無機酸﹑堿﹑鹽大部分物質(zhì)及許多有機物。</p><p>　　塑料水箱使用的是PE聚乙烯為典型的熱塑性塑料，是無臭、無味、無毒的可燃性白色粉末。成型加工的PE樹脂均是經(jīng)擠出造粒的蠟狀顆粒料，外觀呈乳白色，聚乙烯化學(xué)穩(wěn)定性較好。</p><p>　　1、PE為結(jié)晶性原料，吸濕性極小，不超過0.01%，因此在加工前無需進(jìn)行干燥處理。</p><p>　　2、PE分子聯(lián)鏈柔性好，鍵間作用力小，熔體粘性低，流動性*，因此成型時無需太高壓力就能成型出薄壁長流程制品。</p><p>　　3、PE的收縮率范圍大，收縮值大，方向性明顯，LDPE收縮率為1.22%左右，HDPE收縮率在1.5%左右。因此容易變形翹曲，模具冷卻條件對收縮率的影響很大，故應(yīng)該控制好模具溫度，保持冷卻均勻、穩(wěn)定。</p><p>　　4、PE的結(jié)晶能力高，模具的溫度對塑件的結(jié)晶狀況有很較大的影響。模溫高，熔體冷卻慢，塑件結(jié)晶度高，強度也就高。</p><p>　　5、PE的熔點不高，但比熱容較大，因此塑化時仍需要消耗較多的熱量，故要求塑化裝置要有較大的加熱功率，以便提高生產(chǎn)效率。</p><p>　　6、PE的軟化溫度范圍較小，且熔體易氧化，因此在成型加工中應(yīng)盡可能避免熔體與氧發(fā)生接觸，以免降低塑件質(zhì)量。</p><p>　　7、PE制件質(zhì)地較軟，且易脫模，因此當(dāng)塑件有淺側(cè)凹槽時可以強力脫模。</p><p>　　8、PE熔體的非牛頓性不明顯，剪切速率的改變對粘度的影響較小，PE熔體粘度受溫度的影響也較小。</p><p>　　9、PE熔體的冷卻速度較慢，因此必須充分冷卻，模具應(yīng)該具有較好的冷卻系統(tǒng)。</p><p>　　10、若PE熔體在注射時采用直接進(jìn)料口進(jìn)料，易增大應(yīng)力和產(chǎn)生搜索不均勻及方向性明顯的增大變形，因此應(yīng)注意選擇進(jìn)料口參數(shù)。</p><p>　　11、PE的成型溫度較寬，在流動狀態(tài)下，溫度的少許波動對注塑成型沒有影響。</p><p>　　12、PE的熱穩(wěn)定性較好，一般在300度以下無明顯的分解現(xiàn)象，對質(zhì)量沒什么影響</p> 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