CN112208114A - 一种高密度聚乙烯交叉膜的制备方法 - Google Patents

一种高密度聚乙烯交叉膜的制备方法 Download PDF

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CN112208114A
CN112208114A CN202010961310.5A CN202010961310A CN112208114A CN 112208114 A CN112208114 A CN 112208114A CN 202010961310 A CN202010961310 A CN 202010961310A CN 112208114 A CN112208114 A CN 112208114A
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density polyethylene
tubular film
carrying
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杨小亮
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JINGZHOU YUSHI PLASTIC INDUSTRY Co.,Ltd.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C—CHEMISTRY; METALLURGY
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    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
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    • B29C2071/022—Annealing
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    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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    • C08K5/04—Oxygen-containing compounds
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Abstract

本发明公开了一种高密度聚乙烯交叉膜的制备方法，属于交叉膜技术领域，包括以下步骤：向高密度聚乙烯中加入过氧化物交联剂，且加热，得到混合物；其中加热温度为168～172℃，加热时间为8～12秒：对混合物进行挤出处理且通过模具制模且冷却成型后得到高密度聚乙烯管状薄膜；对高密度聚乙烯管状薄膜进行取向拉伸，拉伸后进行退火放气收卷处理，拉伸倍率为3‑5倍；收卷后的高密度聚乙烯管状薄膜充气且进行45°螺旋切割，得到45°高密度聚乙烯管状薄膜片层；将两层45°高密度聚乙烯管状薄膜片层交叉复合即可；通过上述方法得到的交叉膜耐温性能良好，在90‑110℃的环境中保持20秒无变形，微收缩。

Description

一种高密度聚乙烯交叉膜的制备方法
技术领域
本发明属于交叉膜技术领域，具体涉及一种高密度聚乙烯交叉膜的制备方法。
背景技术
目前国内的交叉膜选用的原材料都是普通的高密度聚乙烯(HDPE)，市面上普通的高密度聚乙烯的耐温性能差，很难适应防水卷材上的高温环境，适用范围窄。
发明内容
为了解决现有技术存在的上述问题，本发明提供了一种高密度聚乙烯交叉膜的制备方法。
本发明所采用的技术方案为：一种高密度聚乙烯交叉膜的制备方法，包括以下步骤：
S1：向高密度聚乙烯中加入过氧化物交联剂，且加热，得到混合物；其中加热温度为168～172℃，加热时间为8～12秒：
S2：对混合物进行挤出处理且通过模具制模且冷却成型后得到高密度聚乙烯管状薄膜；
S3：对高密度聚乙烯管状薄膜进行取向拉伸，拉伸后进行退火放气收卷处理，拉伸倍率为3-5倍；
S4：收卷后的高密度聚乙烯管状薄膜充气且进行45°螺旋切割，得到45°高密度聚乙烯管状薄膜片层；
S5：将两层45°高密度聚乙烯管状薄膜片层交叉复合即可。
进一步限定，步骤S5中两层45°高密度聚乙烯管状薄膜片层采用胶水复合或低密度聚乙烯热复合。
进一步限定，所述过氧化物交联剂为2,5-二甲基-2,5-特丁基过氧化己烷或过氧化二异丙苯。
由于拉伸和45°螺旋切割无法同步一体完成，因此必须拉伸后进行收卷后，再放到螺旋切割设备上进行放卷切割。
本发明的有益效果为：过氧化物交联剂受热分解产生活性自由基，与高密度聚乙烯分子中不饱和位点结合生成活性中心，通过高密度聚乙烯中的单体把这些活性中心连接，大分子链间通过化学键连接起来，形成网状结构高分子，使得高密度聚乙烯的耐温性能大幅提升，使用范围增大，能够适应防水卷材上的高温环境。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面对本发明的实施例进行详细、完整的描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本发明所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非被特定定义，否则不会用理想化或过于正式的含义来解释。
实施例1
一种高密度聚乙烯交叉膜的制备方法，包括以下步骤：
S1：向高密度聚乙烯中加入2,5-二甲基-2,5-特丁基过氧化己烷，且经过吹膜机的螺杆加热至170℃，加热10秒，得到混合物；
S2：通过螺杆对混合物进行挤出处理，挤入模具中进行制模冷却成型即得到高密度聚乙烯管状薄膜；
S3：对高密度聚乙烯管状薄膜以3倍的倍率进行取向拉伸，拉伸后进行退火放气收卷处理；通过取向拉伸，可以定向的排列高密度聚乙烯分子，从而在纵向方向获得超高的强度；
S4：收卷后的高密度聚乙烯管状薄膜重新展开且进行充气，充气后进行45°螺旋切割，得到45°高密度聚乙烯管状薄膜片层；
S5：将两层45°高密度聚乙烯管状薄膜片层交叉复合即可得到45°高密度聚乙烯交叉膜，此处的交叉复合采用胶水复合或低密度聚乙烯热复合。
对45°高密度聚乙烯交叉膜进行耐温测试，结果如表1所示；
Figure BDA0002680646100000031
Figure BDA0002680646100000041
由表1可知，本实施例中制备得到的45°高密度聚乙烯交叉膜在耐温性能方面尤为突出，在90-110℃的环境中保持20秒无变形，微收缩。
“+”是表示45°高密度聚乙烯交叉膜伸长了，比测试前的长度大了；
“-”是表示45°高密度聚乙烯交叉膜缩短了，比测试前的长度短了。
本发明不局限于上述可选实施方式，任何人在本发明的启示下都可得出其他各种形式的产品，但不论在其形状或结构上作任何变化，凡是落入本发明权利要求界定范围内的技术方案，均落在本发明的保护范围之内。

Claims (3)

1.一种高密度聚乙烯交叉膜的制备方法，其特征在于，包括以下步骤：
S1：向高密度聚乙烯中加入过氧化物交联剂，且加热，得到混合物；其中加热温度为168～172℃，加热时间为8～12秒：
S2：对混合物进行挤出处理且通过模具制模且冷却成型后得到高密度聚乙烯管状薄膜；
S3：对高密度聚乙烯管状薄膜进行取向拉伸，拉伸后进行退火放气收卷处理，拉伸倍率为3-5倍；
S4：收卷后的高密度聚乙烯管状薄膜充气且进行45°螺旋切割，得到45°高密度聚乙烯管状薄膜片层；
S5：将两层45°高密度聚乙烯管状薄膜片层交叉复合即可。
2.根据权利要求1所述的高密度聚乙烯交叉膜的制备方法，其特征在于，步骤S5中两层45°高密度聚乙烯管状薄膜片层采用胶水复合或低密度聚乙烯热复合。
3.根据权利要求1或2所述的高密度聚乙烯交叉膜的制备方法，其特征在于，所述过氧化物交联剂为2,5-二甲基-2,5-特丁基过氧化己烷或过氧化二异丙苯。
CN202010961310.5A 2020-09-14 2020-09-14 一种高密度聚乙烯交叉膜的制备方法 Pending CN112208114A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103057136A (zh) * 2012-11-30 2013-04-24 南通捷诺塑胶科技有限公司 一种具有高抗撕裂强度的聚乙烯薄膜的制备方法
CN103802424A (zh) * 2013-12-26 2014-05-21 上海优珀斯材料科技有限公司 一种聚乙烯强力交叉复合膜及其生产工艺
CN108976571A (zh) * 2017-05-31 2018-12-11 中国石油化工股份有限公司 一种防水卷材隔离膜用高密度聚乙烯组合物及其制备方法
CN110330594A (zh) * 2019-07-04 2019-10-15 四川轻化工大学 一种聚乙烯交联改性的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103057136A (zh) * 2012-11-30 2013-04-24 南通捷诺塑胶科技有限公司 一种具有高抗撕裂强度的聚乙烯薄膜的制备方法
CN103802424A (zh) * 2013-12-26 2014-05-21 上海优珀斯材料科技有限公司 一种聚乙烯强力交叉复合膜及其生产工艺
CN108976571A (zh) * 2017-05-31 2018-12-11 中国石油化工股份有限公司 一种防水卷材隔离膜用高密度聚乙烯组合物及其制备方法
CN110330594A (zh) * 2019-07-04 2019-10-15 四川轻化工大学 一种聚乙烯交联改性的方法

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