CN103709517A - 哑光型皮革转移bopp膜及其制备方法 - Google Patents

哑光型皮革转移bopp膜及其制备方法 Download PDF

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CN103709517A
CN103709517A CN201310749561.7A CN201310749561A CN103709517A CN 103709517 A CN103709517 A CN 103709517A CN 201310749561 A CN201310749561 A CN 201310749561A CN 103709517 A CN103709517 A CN 103709517A
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陈利红
任通
丁海军
虞万金
余序安
陈华
张爱民
盛霞娟
罗志伟
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ZHEJIANG KINLEAD INNOVATIVE MATERIALS Co.,Ltd.
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Abstract

本发明涉及一种哑光型皮革转移BOPP膜及其制备方法,它由内表层、芯层和外表层组成,内表层、芯层和外表层通过共挤出后经过双向拉伸而成,所述内表层的材料由聚丙烯和防粘剂组成,内表层的各组份所占的质量百分数为:聚丙烯97.5~98.5%,防粘剂1.5~2.5%;所述芯层由聚丙烯、抗静电剂和爽滑剂组成,芯层的各组份所占的质量百分数为:聚丙烯98.0~98.4%,抗静电剂1.0~1.2%,爽滑剂0.4~1.0%;所述外表层采用消光料,该消光料由聚乙烯、高密度聚乙烯和抗氧剂组成,消光料的各组份所占的重量百分数为:聚乙烯54~56%,高密度聚乙烯43.7~45.7%,抗氧剂0.3%。本发明的原料选择及配比合理,选用的聚丙烯原料加工性能好,机械强度高,制得的BOPP膜的弹性模量大、热收缩率低,外表层的雾度和光泽度等性能指标优良。

Description

哑光型皮革转移BOPP膜及其制备方法
技术领域
本发明涉及一种哑光型皮革转移BOPP膜及其制备方法,属于新型材料技术领域。
背景技术
转移膜通常是在PET薄膜上采用凹版涂布、真空镀铝及背涂热溶胶而成,可通过加热、加压的方法将铝层、色彩转移到纸、皮革、纺织品等基材上,从而改变基材外观及品质,起着提高产品档次的作用。皮革企业通常用BOPET膜作转移膜用,主要是利用其高刚性和低热收缩率。近年来,BOPET因受国际环境影响价格涨至约30000元/吨,且交货期较长,大大增加生产厂家成本,因此,亟待开发一种新型转移摸以替代BOPET膜。
近年来哑光膜(BOPP行业通常称消光膜)因其雾度高、低光泽等特征,在印刷、复合等应用广泛,因其刚性和热收缩率等不如BOPET膜,因此在皮革转移上还难以应用。普通消光BOPP薄膜用来做皮革转移有很多技术上的难题,主要表现为以下几点:1):因原材料不同,普通消光BOPP薄膜的刚性(弹性模量)没有BOPET好,作为转移基材相比BOPET有一定的差距;2)消光皮革转移膜对消光层分布均匀性有极大要求,光泽度和雾度是体现消光膜均匀性较好的依据,如果消光层分布不均将直接影响转移的产品质量;3):BOPP在热收缩率上没有BOPET稳定,一般BOPP热收缩率MD≤5,TD≤4,而BOPET热收缩率MD≤3,TD均为0,而转移时需要一定的温度和压力,对薄膜热收缩率有较高的要求;本发明通过提高消光BOPP膜的弹性模量、降低热收缩率、提高消光层的雾度和降低光泽度等性能试制出能适用于皮革转移的BOPP膜,经客户使用可以替代BOPET消光转移膜,从而打破BOPET消光膜在此领域垄断的局势。
发明内容
本发明的目的在于解决现有技术的不足,提供一种哑光型皮革转移BOPP膜。
    本发明还有一个目的在于提供一种哑光型皮革转移BOPP膜的制备方法
本发明解决其技术问题所采用的技术方案是: 
哑光型皮革转移BOPP膜,它由内表层、芯层和外表层组成,内表层、芯层和外表层通过共挤出后经过双向拉伸而成,所述内表层的材料由聚丙烯和防粘剂组成,内表层的各组份所占的质量百分数为:聚丙烯 97.5~98.5%,防粘剂 1.5~2.5%;所述芯层由聚丙烯、抗静电剂和爽滑剂组成,芯层的各组份所占的质量百分数为:聚丙烯 98.0~98.4%,抗静电剂 1.0~1.2%,爽滑剂 0.4~1.0%;所述外表层采用消光料,该消光料由共聚聚丙烯、高密度聚乙烯和抗氧剂组成,消光料的各组份所占的重量百分数为:共聚聚丙烯 54~56%,高密度聚乙烯 43.7~45.7%,抗氧剂 0.3%。
作为优选,所述内表层的厚度为1.0μm,芯层的厚度为17.5μm,外表层的厚度为3.5μm。
作为优选,所述内表层和芯层所用的聚丙烯选用熔融指数2.8以上的均聚聚丙烯或三元共聚聚丙烯,所述防粘剂选用合成硅石类防粘剂。
本发明的原料选择合理,选用的熔融指数2.8以上的聚丙烯原料加工性能好,机械强度高,各原料的配比也合理,制得的BOPP膜的弹性模量大、热收缩率低,消光层的雾度和光泽度等性能指标优良。
一种哑光型皮革转移BOPP膜的制备方法,所述制备方法包括下列步骤:
(1)将内表层、芯层和外表层的原料用不同挤出机分开投料并塑化,其中挤出机的挤出温度为235~250℃,用于外表层原料加工的挤出机的过滤网目数为120目;
(2)将步骤(1)塑化获得的熔体经过复合、铸片、纵拉、横拉处理获得哑光型皮革转移BOPP母膜,该母膜经过时效处理后分切获得哑光型皮革转移BOPP膜成品。
作为优选,所述铸片工艺温度为35~40℃,纵拉工艺温度为126~130℃,横拉工艺温度为157~171℃。
本发明的有益效果是:
 (1)为了提高哑光型皮革转移BOPP薄膜的刚性,一方面通过对各层的原料组成及配比参数进行优化,获得了最佳的各层原料组成及其配比,从而提高了本发明的BOPP薄膜生产的拉伸倍率,纵向拉伸比提高到5.4-5.5,远高于普通膜的4.5-4.9,横向拉伸比提高到10倍,远高于普通膜的9倍;另在在生产中将纵向和横向的定型工艺温度适当提高,这样薄膜刚性增加,同时也降低了热收缩率;
(2)为提高外表层(即消光层)的分布均匀性,将消光层的挤出机过滤网目数由原来320目的滤网降低改用120目,降低消光料在挤出机内的阻力,提高消光料的流速,相应地也提高了生产效率,降低了生产成本,同时将消光层的厚度由普通消光层的2.5μ增加至3.5μ从而提高雾度和分布均匀度。
附图说明
图1是本发明的哑光型皮革转移BOPP薄膜的生产工艺流程图。
具体实施方式
下面通过具体实施例,对本发明的技术方案作进一步的具体说明。
实施例1:
哑光型皮革转移BOPP膜,它由内表层、芯层和外表层组成,所述内表层的厚度为1.0μm,芯层的厚度为17.5μm,外表层的厚度为3.5μm,内表层、芯层和外表层通过共挤出后经过双向拉伸而成,所述内表层的材料由聚丙烯和防粘剂组成,内表层的各组份所占的质量百分数为:聚丙烯 97.5%,防粘剂 2.5%;所述芯层由聚丙烯、抗静电剂和爽滑剂组成,芯层的各组份所占的质量百分数为:聚丙烯 98.0%,抗静电剂 1.0%,爽滑剂 1.0%;所述外表层采用消光料,该消光料由共聚聚丙烯、高密度聚乙烯和抗氧剂组成,消光料的各组份所占的重量百分数为:共聚聚丙烯 54%,高密度聚乙烯45.7%,抗氧剂 0.3%。
实施例1中内表层和芯层所用的聚丙烯选用熔融指数2.8以上的均聚聚丙烯,所述防粘剂选用合成硅石类防粘剂。
实施例1所述的哑光型皮革转移BOPP膜的制备方法包括下列步骤:
(1)将内表层、芯层和外表层的原料分别按上述配比备好,然后投料于不同的挤出机分开塑化,其中挤出机的挤出温度为235~250℃,用于外表层原料加工的挤出机的过滤网目数为120目,其余挤出机的过滤网目数为320目;
(2)将步骤(1)塑化获得的熔体经过复合、铸片、纵拉、横拉处理获得哑光型皮革转移BOPP母膜,该母膜经过时效处理三天后分切获得哑光型皮革转移BOPP膜成品,其中所述铸片的工艺温度为35~40℃,纵拉的工艺温度为126~130℃,横拉的工艺温度为157~171℃。
实施例2:
哑光型皮革转移BOPP膜,它由内表层、芯层和外表层组成,所述内表层的厚度为1.0μm,芯层的厚度为17.5μm,外表层的厚度为3.5μm,内表层、芯层和外表层通过共挤出后经过双向拉伸而成,所述内表层的材料由聚丙烯和防粘剂组成,内表层的各组份所占的质量百分数为:聚丙烯 98.5%,防粘剂 1.5%;所述芯层由聚丙烯、抗静电剂和爽滑剂组成,芯层的各组份所占的质量百分数为:聚丙烯 98.4%,抗静电剂 1.2%,爽滑剂 0.4%;所述外表层采用消光料,该消光料由共聚聚丙烯、高密度聚乙烯和抗氧剂组成,消光料的各组份所占的重量百分数为:共聚聚丙烯 56%,高密度聚乙烯43.7%,抗氧剂 0.3%。
实施例2中内表层和芯层所用的聚丙烯选用熔融指数2.8以上的三元共聚聚丙烯,所述防粘剂选用合成硅石类防粘剂。
实施例2所述的哑光型皮革转移BOPP膜的制备方法包括下列步骤:
(1)将内表层、芯层和外表层的原料分别按上述配比备好,然后投料于不同的挤出机分开塑化,其中挤出机的挤出温度为235~250℃,用于外表层原料加工的挤出机的过滤网目数为120目,其余挤出机的过滤网目数为320目;
(2)将步骤(1)塑化获得的熔体经过复合、铸片、纵拉、横拉处理获得哑光型皮革转移BOPP母膜,该母膜经过时效处理三天后分切获得哑光型皮革转移BOPP膜成品,其中所述铸片工艺温度为35~40℃,纵拉工艺温度为126~130℃,横拉工艺温度为157~171℃。
实施例3:
哑光型皮革转移BOPP膜,它由内表层、芯层和外表层组成,所述内表层的厚度为1.0μm,芯层的厚度为17.5μm,外表层的厚度为3.5μm,内表层、芯层和外表层通过共挤出后经过双向拉伸而成,所述内表层的材料由聚丙烯和防粘剂组成,内表层的各组份所占的质量百分数为:聚丙烯 98.0%,防粘剂 2.0%;所述芯层由聚丙烯、抗静电剂和爽滑剂组成,芯层的各组份所占的质量百分数为:聚丙烯 98.2%,抗静电剂 1.1%,爽滑剂 0.7%;所述外表层采用消光料,该消光料由共聚聚丙烯、高密度聚乙烯和抗氧剂组成,消光料的各组份所占的重量百分数为:共聚聚丙烯 55%,高密度聚乙烯44.7%,抗氧剂 0.3%。
实施例3中内表层和芯层所用的聚丙烯选用熔融指数2.8以上的三元共聚聚丙烯,所述防粘剂选用合成硅石类防粘剂。
实施例3所述的哑光型皮革转移BOPP膜的制备方法包括下列步骤:
(1)将内表层、芯层和外表层的原料分别按上述配比备好,然后投料于不同的挤出机分开塑化,其中挤出机的挤出温度为235~250℃,用于外表层原料加工的挤出机的过滤网目数为120目,其余挤出机的过滤网目数为320目;
(2)将步骤(1)塑化获得的熔体经过复合、铸片、纵拉、横拉处理获得哑光型皮革转移BOPP母膜,该母膜经过时效处理三天后分切获得哑光型皮革转移BOPP膜成品,其中所述铸片工艺温度为35~40℃,纵拉工艺温度为126~130℃,横拉工艺温度为157~171℃。
对实施例1~3制得的哑光型皮革转移BOPP膜的性能进行检测:
检测的方法:参照国标GB/T 10003—2008 的测试方法
检测的指标:1、润湿张力 2、雾度 3、光泽度 4、热收缩率
实施例1~3制得的哑光型皮革转移BOPP的性能测试结果如表1所示:
表1 哑光型皮革转移BOPP的性能测试结果
Figure 2013107495617100002DEST_PATH_IMAGE002
以上所述的实施例只是本发明的一种较佳的方案,并非对本发明作任何形式上的限制,在不超出权利要求所记载的技术方案的前提下还有其它的变体及改型。

Claims (5)

1.哑光型皮革转移BOPP膜,其特征在于,它由内表层、芯层和外表层组成,内表层、芯层和外表层通过共挤出后经过双向拉伸而成,所述内表层的材料由聚丙烯和防粘剂组成,内表层的各组份所占的质量百分数为:聚丙烯 97.5~98.5%,防粘剂 1.5~2.5%;所述芯层由聚丙烯、抗静电剂和爽滑剂组成,芯层的各组份所占的质量百分数为:聚丙烯 98.0~98.4%,抗静电剂 1.0~1.2%,爽滑剂 0.4~1.0%;所述外表层采用消光料,该消光料由共聚聚丙烯、高密度聚乙烯和抗氧剂组成,消光料的各组份所占的重量百分数为:共聚聚丙烯 54~56%,高密度聚乙烯 43.7~45.7%,抗氧剂 0.3%。
2.根据权利要求1所述的哑光型皮革转移BOPP膜,其特征在于,所述内表层的厚度为1.0μm,芯层的厚度为17.5μm,外表层的厚度为3.5μm。
3.根据权利要求1所述的哑光型皮革转移BOPP膜,其特征在于,所述内表层和芯层所用的聚丙烯选用熔融指数2.8以上的均聚聚丙烯或三元共聚聚丙烯,所述防粘剂选用合成硅石类防粘剂。
4.一种权利要求1至3任意一项所述的哑光型皮革转移BOPP膜的制备方法,其特征在于,所述制备方法包括下列步骤:
(1)将内表层、芯层和外表层的原料用不同挤出机分开投料并塑化,其中挤出机的挤出温度为235~250℃,用于外表层原料加工的挤出机的过滤网目数为120目;
(2)将步骤(1)塑化获得的熔体经过复合、铸片、纵拉、横拉处理获得哑光型皮革转移BOPP母膜,该母膜经过时效处理后分切获得哑光型皮革转移BOPP膜成品。
5.根据权利要求4所述的哑光型皮革转移BOPP膜的制备方法,其特征在于:所述铸片工艺温度为35~40℃,纵拉工艺温度为126~130℃,横拉工艺温度为157~171℃。
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Patentee after: ZHEJIANG KINLEAD INNOVATIVE MATERIALS Co.,Ltd.

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Patentee before: KINWIN PLASTIC INDUSTRIAL Co.,Ltd.