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（華東建筑設(shè)計(jì)研究院有限公司， 上海 200011）
［摘要］對三種型號(hào)的長條形聚四氟乙烯（PTFE）薄膜連接試件進(jìn)行了7種搭接寬度（20，30，40，50，60，70，80mm）下的單軸拉伸試驗(yàn)，得到了相應(yīng)的應(yīng)力\|應(yīng)變曲線、薄膜破壞形式以及連接強(qiáng)度的變化規(guī)律。結(jié)果表明，當(dāng)搭接寬度為20～30mm時(shí)，PTFE薄膜試件破壞位置多發(fā)生于搭接熱合區(qū)內(nèi)或者熱合區(qū)邊緣處；當(dāng)搭接寬度大于30mm時(shí)，薄膜試件破壞位置則發(fā)生于母材區(qū)域范圍內(nèi)；在搭接寬度為30～40mm時(shí)，PTFE薄膜的連接強(qiáng)度基本可以達(dá)到母材抗拉強(qiáng)度的80%，在搭接寬度為50～60mm時(shí)，PTFE薄膜的連接強(qiáng)度基本可以達(dá)到母材抗拉強(qiáng)度。
［關(guān)鍵詞］聚四氟乙烯(PTFE)薄膜； 熱合連接； 搭接寬度； 連接強(qiáng)度
中圖分類號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)12-0058-06
Study on effect of lap with on connection strength of PTFE coated fabrics
Cui Jiachun
(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200011, China)
Abstract:Uniaxial extension tests were carried out on three kinds of Poly Tetra Fluoro Ethylene (PTFE) coated fabric connection specimens with seven different lap widths including 20, 30, 40, 50, 60, 70 and 80mm. The variation trends of stress-strain curve, failure mode and connection strength were obtained from the tests. The test results show that the failure location of PTFE coated fabric specimens occurs in heat sealing area or at the edge of the heat sealing zone if lap width is 20～30mm; the failure location appears on the base meterial if lap width is greater than 30mm; the connection strength of membrane can achieve 80% of base meterial if lap width is 30～40mm while the coated fabric can reach base meterial strength if lap width is 50～60mm.
Keywords:Poly Tetra Fluoro Ethylene(PTFE) coated fabric; heat sealing connection; lap width; connection strength
作者簡介：崔家春，博士，高級(jí)工程師，Email:jiachun_cui@arcplus.com.cn。
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