CN110055003A - 一种pu复合板用热熔胶膜 - Google Patents

一种pu复合板用热熔胶膜 Download PDF

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CN110055003A
CN110055003A CN201910331540.0A CN201910331540A CN110055003A CN 110055003 A CN110055003 A CN 110055003A CN 201910331540 A CN201910331540 A CN 201910331540A CN 110055003 A CN110055003 A CN 110055003A
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闵金林
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LIYANG CITY SHANHU INDUSTRY Co Ltd
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    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
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    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/241—Polyolefin, e.g.rubber
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    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
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    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
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    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
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Abstract

本发明公开了一种PU复合板用热熔胶膜，是基于工艺进步的整体胶膜方案，包括粘接PU片用胶膜，表面粘接面膜和背板粘接刚性膜等。主要针对热熔胶膜的生产问题进行配方改善，在保证PU板材性能的前提下，保证了热熔胶膜的生产稳定性，并降低了品种切换时的浪费。

Description

一种PU复合板用热熔胶膜
技术领域
本发明涉及一种热熔胶膜，更具体的说是一种PU复合板用热熔胶膜。
背景技术
目前PU复合板在市场应用朝着高速化方向发展，一步法工艺由于生产效率高性能稳定已经成为大多数PU复合板厂家的首选。热熔胶膜对于一步法生产有着重要作用。主要包括三种胶膜，用于背面的刚性胶膜，表面粘接面料的面膜和用于粘接PU板材的胶膜。
三种胶膜对于性能要求完全不同，刚性胶膜主要用于支撑玻璃纤维和胶粉，同时对于板材的表面平整度有重要影响，对于粘接性能不能过高否则会出现漏胶等现象。表面粘接用胶膜主要根据面料的粘接要求，保证和板材成型受拉时依然对面料有较高的粘接性能。对于PU板材的粘接胶膜，则需要对PU有较高的粘接性，从而提高板材的整体强度。
三种胶膜由于性能要求完全不同，因此在工艺生产和配方要求中都有着不同的要求。刚性胶膜主要以HDPE或PP复配为主，熔融指数相对较小，面膜和PU板粘接用胶膜，主要有EAA或者EVA为粘接性能，熔融指数相对较高。
目前胶膜主要采用流延法生产，由于不同胶膜的熔体粘度相差较远，在生产中更换品种时需要调平的时间较长，不仅生产更换品种的浪费大，同时生产过程中也容易出现质量波动，导致在复合板材的工艺过程中出现胶膜皱褶等异常。
发明内容
本发明主要解决的技术问题是提供一种PU复合板用热熔胶膜。本发明所述一步法PU复合板用热熔胶膜是基于工艺进步的整体胶膜方案，包括粘接PU片用胶膜，表面粘接面膜和背板粘接刚性膜等。热熔胶膜的性能直接影响PU复合板的整体强度、平整度和复合板材生产稳定性。
为实现上述发明目的，本发明采用如下技术方案：
虽然EAA胶膜和HDPE的热熔胶膜作用不同，但是在生产中使用同一台流延设备进行生产，在品种切换过程中需要花费较长的过渡时间来进行平整度调整。因此本发明不仅仅考虑性能，还综合考虑了胶膜的生产需求，减少生产过程中的过渡浪费，具体来说，就是在满足性能的前提下，综合考虑生产诉求，在EAA胶膜中适当添加HDPE进行配方优化，同时在HDPE胶膜中适当添加EAA进行优化。具体如下：
EAA胶膜(面膜和粘接PU用胶膜)添加HDPE用于平抑生产波动，同时采用不同熔融指数的EAA作为复合配方，配方主要成分包括：
高熔指EAA含量在20％～30％，低熔指EAA含量在10％～15％，HDPE含量在10％～20％，LDPE含量在10％～15％，LLDPE含量在20％～30％；
HDPE刚性膜配方优化后的主要成分包括：
HDPE含量在50％～60％，LDPE含量在10％～20％，低熔指EAA含量在5％～10％，LLDPE含量在10％～20％；
由于所有配方用材料均是颗粒状材料，采用高速搅拌机就可以均匀混合。
由于EAA的粘接性能要高于EVA，本技术从粘接角度出发，面膜和粘接PU用胶膜，主要采用EAA作为粘接方案，同时考虑到生产PU复合板时，面膜和皮带长期接触，为防止过度损害皮带，在面膜中采用爽滑型材料配方，刚性膜采用HDPE为材料方案。
具体实施方式
不同热熔胶膜均采用流延工艺生产，在一台设备上进行不同品种的切换，切换过程中不改变加热温度，仅仅调整口模膜唇的厚度用于调整不同热熔胶膜的平整性。生产工艺如下：材料混合-----挤出机塑化-----口模流出-----冷却压花辊-----收卷
材料混合使用高速剪切混合设备，生产用的混合设备容积，满足每次混料在200公斤左右。
材料塑化时的设定温度在150～210之间，常见4段加热单元，温度在150度，170度，190度，205度。
口模温度一般高于材料塑化的设定温度，温度设定在210～230度这件，流延法生产薄膜采用狭缝形口模，口模中间部分温度设定在210度左右，两边部分设定在230度左右。
口模流出经过冷却压花辊定型后牵引收卷，收卷速度根据设备的生产能力决定。一般在100～150公斤/小时。
收卷采用预张力收紧，薄膜厚度均匀性在收紧装置中可以反应出来，一般成卷薄膜两端的卷厚度差异在0～3mm左右。
1、性能指标：
测试使用的PU复合板材克重850g/m2，厚度6.5±0.5mm，材料结构一致；
2、合格率改善：
配方改善前，胶膜生产收卷时，存在严重的波浪形不平，导致使用时撒在胶膜上的玻纤，胶粉等材料严重不均匀，不良率高达20％。
配方改善后，胶膜生产时收卷齐整，不存在波浪形问题，玻纤切撒均匀，胶粉撒落均匀，合格率100％。

Claims (2)

1.一种PU复合板用热熔胶膜，其特征在于，所述热熔胶膜包括EAA胶膜添加HDPE用于平抑生产波动，同时采用不同熔融指数的EAA作为复合配方，配方主要成分包括：
高熔指EAA含量在20％～30％，低熔指EAA含量在10％～15％，HDPE含量在10％～20％，LDPE含量在10％～15％，LLDPE含量在20％～30％；
HDPE刚性膜配方优化后的主要成分包括：
HDPE含量在50％～60％，LDPE含量在10％～20％，低熔指EAA含量在5％～10％，LLDPE含量在10％～20％。
2.权利要求1所述的一种PU复合板用热熔胶膜的制备方法，其特征在于，所述生产工艺包括如下步骤：
材料塑化时的设定温度在150～210之间，常见4段加热单元，温度在150度，170度，190度，205度；
口模温度一般高于材料塑化的设定温度，温度设定在210～230度这件，流延法生产薄膜采用狭缝形口模，口模中间部分温度设定在210度左右，两边部分设定在230度左右；
口模流出经过冷却压花辊定型后牵引收卷，收卷速度根据设备的生产能力决定。一般在100～150公斤/小时；
收卷采用预张力收紧，薄膜厚度均匀性在收紧装置中可以反应出来，一般成卷薄膜两端的卷厚度差异在0～3mm左右。
CN201910331540.0A 2019-04-24 2019-04-24 一种pu复合板用热熔胶膜 Pending CN110055003A (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101544083A (zh) * 2009-04-27 2009-09-30 陈雅君 汽车顶篷用聚氨酯多层复合板及其加工方法
CN102050062A (zh) * 2010-11-19 2011-05-11 烟台正海汽车内饰件有限公司 一种汽车内饰顶棚的生产方法
CN102350832A (zh) * 2011-09-01 2012-02-15 溧阳市山湖实业有限公司汽车装饰材料分公司 一种汽车顶蓬用聚氨酯复合板
CN103538329A (zh) * 2013-08-26 2014-01-29 张家港长泰汽车饰件材料有限公司 一种汽车顶篷用聚氨酯多层复合板的生产方法
CN107151539A (zh) * 2017-04-20 2017-09-12 临安福斯特热熔网膜有限公司 一种汽车内饰件用环保热熔胶膜及制备方法与用途

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101544083A (zh) * 2009-04-27 2009-09-30 陈雅君 汽车顶篷用聚氨酯多层复合板及其加工方法
CN102050062A (zh) * 2010-11-19 2011-05-11 烟台正海汽车内饰件有限公司 一种汽车内饰顶棚的生产方法
CN102350832A (zh) * 2011-09-01 2012-02-15 溧阳市山湖实业有限公司汽车装饰材料分公司 一种汽车顶蓬用聚氨酯复合板
CN103538329A (zh) * 2013-08-26 2014-01-29 张家港长泰汽车饰件材料有限公司 一种汽车顶篷用聚氨酯多层复合板的生产方法
CN107151539A (zh) * 2017-04-20 2017-09-12 临安福斯特热熔网膜有限公司 一种汽车内饰件用环保热熔胶膜及制备方法与用途

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Application publication date: 20190726