CN106589571A - 一种增强型环保聚乙烯发泡材料及其制备工艺 - Google Patents

一种增强型环保聚乙烯发泡材料及其制备工艺 Download PDF

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CN106589571A
CN106589571A CN201710099449.1A CN201710099449A CN106589571A CN 106589571 A CN106589571 A CN 106589571A CN 201710099449 A CN201710099449 A CN 201710099449A CN 106589571 A CN106589571 A CN 106589571A
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foaming
extrusion
polyethylene
angle
enhancement mode
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曹志怀
张涛
袁辉
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Suzhou Yi Annuo Packaging Technology Co Ltd
Connaught Packaging (shanghai) Ltd By Share Ltd
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Suzhou Yi Annuo Packaging Technology Co Ltd
Connaught Packaging (shanghai) Ltd By Share Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • 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
    • 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
    • C08J2323/08—Copolymers of ethene
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—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
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

一种增强型环保聚乙烯发泡材料，采用C8增强型聚乙烯与普通聚乙烯通过0.85～0.90:0.10～0.15的比例混合而成；采用专用模具挤出发泡加工而成；所述专用模具的挤出角由模唇、发泡模具腔体和发泡挤出顶针构成，模唇和发泡模具腔体内壁构成的角度为63°角，挤出发泡流道截面为的环形流道构成。本发明通过改变挤出角和环形流道结构改善聚乙烯挤出成型平整度和厚度，减少发泡片材瓦楞波纹形状，使单片片材发泡厚度比普通模具提高50％以上；在相同压缩强度下有利于减少原材料用量，提高聚乙烯片材的平整度和降低生产成本。本发明提供的增强型发泡聚乙烯材料配方及其制备工艺可广泛应用于聚乙烯制造领域。

Description

一种增强型环保聚乙烯发泡材料及其制备工艺
技术领域
本发明涉及聚乙烯发泡材料技术领域，尤其是涉及一种增强型环保聚乙烯发泡材料配方及挤出发泡模及其制备工艺方法。
背景技术
聚乙烯(PE)树脂属结晶型聚合物，呈线性结构，受热熔化时大分子间作用力很小，呈现高弹态的温度范围很窄，当树脂熔融后熔体黏度较低，因此发泡时发泡剂的分解气体不易保持在树脂中，使发泡工艺较难控制；PE结晶度大，结晶速度快，由熔融态变至晶态要释放大量结晶热，再加上熔融PE热容较大，冷却至固态所需时间长，不利于气体在发泡过程中保持。此外，PE树脂的气体透过率高，其中低密度聚乙烯(LDPE)比高密度聚乙烯(HDPE)更容易渗透气体，最容易透过的气体是二氧化碳(CO2)。这些因素皆会促进发泡气体的逃逸。
为克服上述缺点，通常要使分子间相互交联成为部分网状结构，以增大树脂黏度，减缓黏度随温度升高而降低的趋势，即调整树脂的粘弹性，以适应发泡要求。PE泡沫塑料可分为交联和无交联两种。交联部分约占聚乙烯泡沫塑料市场的50％，并以每年25％的速度增长。交联PE泡沫塑料分为辐射交联和化学交联两种工艺。如果按照发泡剂分解时外部压力不同分类，可分为常压发泡和加压发泡。发泡聚烯烃材料的开发一直是人们研究的热点。
发明内容
针对现有技术存在的上述问题，本申请提供了一种增强型环保聚乙烯发泡材料及其制备工艺。本发明提供的C8增强型聚乙烯发泡材料及其制备工艺的实现，有助于进一步提升产品的保护性能，降低包装破损，降低企业生产成本。
本发明的技术方案如下：
一种增强型环保聚乙烯发泡材料，采用C8增强型聚乙烯与普通聚乙烯通过特定比例混合而成，所述C8高分子线性聚乙烯与普通聚乙烯的质量比例为0.85～0.90:0.10～0.15。
一种增强型环保聚乙烯发泡材料的制备方法，采用专用模具挤出发泡加工而成；所述专用模具的挤出角由模唇、发泡模具腔体和发泡挤出顶针构成，模唇和发泡模具腔体内壁构成的角度为63°角，挤出发泡流道截面为的环形流道构成。
所述发泡挤顶针的挤出孔采用环形排布并均匀分布。优选的，所述发泡挤顶针的挤出孔为环形排布的φ6和φ7mm的圆孔。
本发明有益的技术效果在于：
本发明利用C8高分子聚乙烯材料独特的更宽分子量分布(C8聚乙烯分子链结构见图1)和更稳定聚乙烯结构，联合开发一种增强型聚乙烯材料配方；研究一种超高平整度和超厚聚乙烯发泡片材挤出模具，使挤出发泡的产品质量更优。用以提高物流包装的保护性，降低物流破损，提升用户体验和降低系统包装成本。
本发明采用C8高分子聚乙烯与普通聚乙烯通过0.80～0.85:0.15～0.20的配比，并利用其独特的更宽分子量分布和更稳定聚乙烯结构，联合开发的一种增强型的聚乙烯发泡材料配方。为使聚乙烯发泡材料充分展现材料物理性能优点，本申请人配套研究了一种63°挤出角和环形流道挤出模具，模具采用更使用间隔大小环形孔挤出，发泡片材表面平整，无瓦楞波纹形状(普通聚乙烯发泡材料表面质量参见图2)，且单片片材厚度比普通模具高近50％以上。通过聚乙烯发泡材料和配套制备工装的研究应用，进一步提升聚乙烯发泡材料的物理机械强度等，满足物流运输使用要求，可进一步降低原材料生产成本和包装材料的减量化应用。
附图说明
图1为本发明C8辛烯与聚乙烯聚合分子单体链示意图。
图2a为普通聚乙烯挤出发泡模头部位的片材表面瓦楞波纹形状示意图。
图2b为普通聚乙烯挤出发泡卷料表面瓦楞波纹示意图。
图3为本发明实施例聚乙烯挤出发泡模具挤出角及环形流道示意图。
图4为本发明实施例聚乙烯发泡模具挤出孔示意图。
具体实施方式
下面结合附图和实施例对本发明聚乙烯发泡制备模具作进一步的说明。
本申请人提供了一种增强型环保聚乙烯发泡材料，采用C8增强型聚乙烯与普通聚乙烯通过特定比例混合而成，所述C8高分子线性聚乙烯与普通聚乙烯的质量比例为0.85～0.90:0.10～0.15。图1为本发明C8辛烯与聚乙烯聚合分子单体链示意图。
本申请人还提供了一种增强型环保聚乙烯发泡材料的制备方法，采用专用模具挤出发泡加工而成；所述专用模具的挤出角由模唇、发泡模具腔体和发泡挤出顶针构成，模唇和发泡模具腔体内壁构成的角度为63°角，挤出发泡流道截面为的环形流道构成。
图3是本发明的聚乙烯发泡模具结构，由其涉及一种63°挤出角结构，其挤出角为模唇和发泡模具腔体内壁构成的角度，如图3所示，模唇与模具腔体、挤出顶针构成了特殊结构的环形流道。
图4为聚乙烯发泡挤出孔排布结构采用环形排布并均匀分布。优选的，由φ6和φ7的圆孔交错均匀分布。
本发明聚乙烯发泡材料采用C8线性高分子材料与普通聚乙烯材料通过一定配比聚合挤出发泡，提升发泡材料的物理机械强度。C8增强型聚乙烯材料经发泡后试验检测证明，其板材压缩强度相对普通同规格材料提升20％以上。物理机械性能的大幅提升能有助于包装制造企业降低材料的使用厚度，从而降低包装材料的用量。增强型聚乙烯材料采用全新的挤出发泡模具挤出加工，能减少发泡片材的表面平整度，减少瓦楞波纹形状，且单片发泡厚度相比普通挤出发泡提高50％以上，有助于进一步降低多层复合板材的生产成本。

Claims (4)

1.一种增强型环保聚乙烯发泡材料，采用C8增强型聚乙烯与普通聚乙烯通过特定比例混合而成，其特征在于：所述C8高分子线性聚乙烯与普通聚乙烯的质量比例为0.85～0.90:0.10～0.15。
2.一种增强型环保聚乙烯发泡材料的制备方法，其特征在于：采用专用模具挤出发泡加工而成；所述专用模具的挤出角由模唇、发泡模具腔体和发泡挤出顶针构成，模唇和发泡模具腔体内壁构成的角度为63°角，挤出发泡流道截面为的环形流道构成。
3.根据权利要求2所述的制备方法，其特征在于所述发泡挤顶针的挤出孔采用环形排布并均匀分布。
4.根据权利要求2或3所述的制备方法，其特征在于所述发泡挤顶针的挤出孔为环形排布的φ6和φ7mm的圆孔。
CN201710099449.1A 2017-02-23 2017-02-23 一种增强型环保聚乙烯发泡材料及其制备工艺 Pending CN106589571A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108215119A (zh) * 2018-01-09 2018-06-29 南京瑞巨新材料技术有限公司 一种挤出发泡片板材机头

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Publication number Priority date Publication date Assignee Title
CN1534061A (zh) * 1998-10-30 2004-10-06 ������ѧ��ʽ���� 交联的烯烃弹性体泡沫料和制造该泡沫体的弹性体组合物
CN103756236A (zh) * 2014-01-06 2014-04-30 朱叶周 用于制备三维打印快速成型的软性打印材料的热塑性弹性体组合物
CN104448376A (zh) * 2013-09-17 2015-03-25 赵宝瀛 软质乙烯-辛烯热塑性弹性体泡沫材料的制备方法

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Publication number Priority date Publication date Assignee Title
CN1534061A (zh) * 1998-10-30 2004-10-06 ������ѧ��ʽ���� 交联的烯烃弹性体泡沫料和制造该泡沫体的弹性体组合物
CN104448376A (zh) * 2013-09-17 2015-03-25 赵宝瀛 软质乙烯-辛烯热塑性弹性体泡沫材料的制备方法
CN103756236A (zh) * 2014-01-06 2014-04-30 朱叶周 用于制备三维打印快速成型的软性打印材料的热塑性弹性体组合物

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108215119A (zh) * 2018-01-09 2018-06-29 南京瑞巨新材料技术有限公司 一种挤出发泡片板材机头

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