CN109371700A - 一种聚乙烯塑料大棚布及其制备方法 - Google Patents

一种聚乙烯塑料大棚布及其制备方法 Download PDF

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CN109371700A
CN109371700A CN201811098244.2A CN201811098244A CN109371700A CN 109371700 A CN109371700 A CN 109371700A CN 201811098244 A CN201811098244 A CN 201811098244A CN 109371700 A CN109371700 A CN 109371700A
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王静
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Abstract

本发明公开了一种聚乙烯塑料大棚布及其制备方法,涉及塑料编织技术领域,其中大棚布为三层复合结构,该三层复合结构包括外表层、中间层和内表层;外表层和内表层均为高压低密度聚乙烯淋膜层;中间层为低压高密度聚乙烯编织布。因本发明的大棚布为三层复合结构,强度高、耐候性好,不易撕裂、磨损,透光度好且衰减慢,使用寿命长,防雾防滴、阻隔红外线保温效果好,从而解决了现有大棚塑料薄膜强度低,易撕破,易磨损,透光度衰减快,更换频繁,产生大量废旧塑料的问题,耐用环保省时省力。又因本发明的制备方法,工艺步骤简单,成本低,使本发明的大棚布可批量生产。

Description

一种聚乙烯塑料大棚布及其制备方法
技术领域
本发明涉及塑料编织技术领域,尤其涉及一种聚乙烯塑料大棚布及其制备方法。
背景技术
传统的塑料大棚,大多使用聚乙烯塑料薄膜。这种聚乙烯塑料薄膜具有强度差,耐候性差的缺点。在使用时,很容易出现撕破、磨损、透光度降低速度快、使用寿命短等问题。使用聚乙烯塑料薄膜后,需要每年都要进行更换,造成了浪费,增加了农户的成本,还污染了环境。
发明内容
针对上述不足,本发明的目的是提供一种聚乙烯塑料大棚布及其制备方法,该聚乙烯塑料大棚布具有高强度、防滴、防雾以及阻隔红外线的优点,并且制备方法简单,易于大批量生产,从而降低了种植成本。
为实现上述目的,本发明的技术方案是:
一种聚乙烯塑料大棚布,所述大棚布为三层复合结构,所述三层复合结构包括外表层、中间层和内表层;所述外表层和所述内表层均为高压低密度聚乙烯淋膜层;所述中间层为低压高密度聚乙烯编织布。
优选方式为,所述外表层包括如下质量份数的组分:聚乙烯80~90份,含有红外线阻隔剂的抗老化混合物10~20份。
优选方式为,所述外表层包括如下质量份数的组分:聚乙烯86份,含有红外线阻隔剂的抗老化混合物14份。
优选方式为,所述中间层包括如下质量份数的组分:聚乙烯92~100份、抗老化剂2~6份。
优选方式为,所述中间层包括如下质量份数的组分:聚乙烯96份、抗老化剂4份。
优选方式为,所述内表层包括如下质量份数的组分:聚乙烯83~89份、含有防雾滴剂的抗老化混合物11~17份。
优选方式为,所述内表层包括如下质量份数的组分:聚乙烯86份、含有防雾滴剂的抗老化混合物14份。
上述的聚乙烯塑料大棚布的制备方法,包括以下步骤:
S1、抗老化母粒制备,按质量份数将制备所述外表层、所述内表层和所述中间层对应的抗老化助剂按比例共混后,通过挤出机造粒得抗老化母粒;
S2、拉丝混料,将中间层所需原材料按比例混合,混合后送入高速混料机中进行均匀混合;
S3、拉丝,将S2中制得的原料送入挤出机,经过螺杆加热塑化,塑化加热的温度范围为230~280℃;再经过模头成型挤出为薄膜,经水冷却,水温在30~45℃范围内;接着用刀片将薄膜切割为胚丝,并通过设定牵伸比6~8倍,经烘箱或拉伸板拉伸成符合技术要求的扁丝,拉伸温度控制在100~120℃,扁丝再经热定型,定型温度范围在110~120℃,并调节牵伸速度及定型速度,控制热回缩率小于3%,最后调节收卷张力,由卷绕机收卷成型;
S4、编织,将S3所获扁丝由编织机编织成编织布,根据要求设定编织密度,使编织布的布面经纬均匀、平整、张力一致;
S5、淋膜,将所述编织布卷送入淋膜机进行均匀淋膜,按外表层配料淋膜一次得外表层,按内表层配料淋膜一次得内表层,得到复合塑料布;
S6、粘合,将所述复合塑料布送入热合机中粘合,热合、切割出大棚覆盖所需塑料布的宽幅与长度。
优选方式为,所述步骤S4中,使编织布的布面纬线平整,无折叠,保证透明度。
采用上述技术方案后,本发明的有益效果是:
由于本发明的聚乙烯塑料大棚布及其制备方法,其中大棚布为三层复合结构,该三层复合结构包括外表层、中间层和内表层;外表层和内表层均为高压低密度聚乙烯淋膜层;中间层为低压高密度聚乙烯编织布。因本发明的大棚布为三层复合结构,强度高、耐候性好,不易撕裂、磨损,透光度好且衰减慢,使用寿命长,防雾防滴、阻隔红外线保温效果好,从而解决了现有大棚塑料薄膜强度低,易撕破,易磨损,透光度衰减快,更换频繁,产生大量废旧塑料的问题,耐用环保省时省力。又因本发明的制备方法,工艺步骤简单,成本低,使本发明的大棚布可批量生产。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例一:
一种聚乙烯塑料大棚布,大棚布为三层复合结构,三层复合结构包括外表层、中间层和内表层;外表层和内表层均为高压低密度聚乙烯淋膜层;中间层为低压高密度聚乙烯编织布。
本实施例中的外表层包括如下质量份数的组分:聚乙烯80~90份,含有红外线阻隔剂的抗老化混合物10~20份;中间层包括如下质量份数的组分:聚乙烯92~100份、抗老化剂2~6份;内表层包括如下质量份数的组分:聚乙烯83~89份、含有防雾滴剂的抗老化混合物11~17份。
本发明的大棚布为三层复合结构,强度高、耐候性好,不易撕裂、磨损,透光度好且衰减慢,使用寿命长,防雾防滴、阻隔红外线保温效果好,从而解决了现有大棚塑料薄膜强度低,易撕破,易磨损,透光度衰减快,更换频繁,产生大量废旧塑料的问题,耐用环保省时省力。
实施例二:
本实施例与实施例一基本相同,不同之处在于:
外表层包括如下质量份数的组分:聚乙烯86份,含有红外线阻隔剂的抗老化混合物14份。
实施例三:
本实施例与实施例一基本相同,不同之处在于:
中间层包括如下质量份数的组分:聚乙烯96份、抗老化剂4份。
实施例四:
本实施例与实施例一基本相同,不同之处在于:
内表层包括如下质量份数的组分:聚乙烯86份、含有防雾滴剂的抗老化混合物14份。
实施例五:
实施例一至四任一项的聚乙烯塑料大棚布,均可采用本实施例的方法进行制备。
一种聚乙烯塑料大棚布的制备方法,包括以下步骤:
S1、抗老化母粒制备,按质量份数将各类抗老化助剂按比例共混后,通过挤出机造粒得抗老化母粒;具体是外表层的含有红外线阻隔剂的抗老化混合物14份;中间层的抗老化剂4份;内表层的含有防雾滴剂的抗老化混合物14份。
S2、拉丝混料,将中间层所需原材料按比例混合,混合后送入高速混料机中进行均匀混合;优选方案是:将96份低压高密度聚乙烯、4份抗老化剂混合,送入高速混料机中混合均匀。
S3、拉丝,将S2中制得的原料送入挤出机,经过螺杆加热塑化,塑化加热的温度范围为230~280℃,优选180~270℃;再经过模头成型挤出为薄膜,经水冷却,水温在30~45℃范围内;接着用刀片将薄膜切割为胚丝,并通过设定牵伸比6~8倍,经烘箱或拉伸板拉伸成符合技术要求的扁丝,拉伸温度控制在100~120℃,扁丝再经热定型,定型温度范围在110~120℃,并调节牵伸速度及定型速度,控制热回缩率小于3%,最后调节收卷张力,由卷绕机收卷成型;
S4、编织,将S3所获扁丝由编织机编织成编织布,根据要求设定编织密度,本例设定为10*10,使编织布的布面经纬均匀、平整、张力一致;使编织布的布面纬线平整,无折叠,保证透明度。
S5、淋膜,将编织布卷送入淋膜机进行均匀淋膜,按外表层配料淋膜一次得外表层,按内表层配料淋膜一次得内表层,得到复合塑料布;
S6、粘合,将复合塑料布送入热合机中粘合,热合、切割出大棚覆盖所需塑料布的宽幅与长度。
采用本例的方法制备的塑料大棚布,其与普通大棚膜各项检测数据对比如下:
表1实施所得编织布性能检测对比表
上述结果可见,本发明所得大棚布,其各项物性强度指标、热回缩率等指标明显优于普通塑料大棚薄膜,强度高、耐候性好,不易撕裂、磨损,透光度较好,虽初始透光度略低于塑料薄膜,但耐磨性能好、透光度衰减慢,使用寿命长。解决了普通大棚薄膜易撕破、易磨损、透光度衰减快、更换频繁的问题,耐用环保经济方便。
以上所述本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同一种聚乙烯塑料大棚布及其制备方法结构的改进等,均应包含在本发明的保护范围之内。

Claims (9)

1.一种聚乙烯塑料大棚布,其特征在于,所述大棚布为三层复合结构,所述三层复合结构包括外表层、中间层和内表层;
所述外表层和所述内表层均为高压低密度聚乙烯淋膜层;
所述中间层为低压高密度聚乙烯编织布。
2.根据权利要求1所述的聚乙烯塑料大棚布,其特征在于,所述外表层包括如下质量份数的组分:
聚乙烯80~90份,含有红外线阻隔剂的抗老化混合物10~20份。
3.根据权利要求2所述的聚乙烯塑料大棚布,其特征在于,所述外表层包括如下质量份数的组分:
聚乙烯86份,含有红外线阻隔剂的抗老化混合物14份。
4.根据权利要求1所述的聚乙烯塑料大棚布,其特征在于,所述中间层包括如下质量份数的组分:
聚乙烯92~100份、抗老化剂2~6份。
5.根据权利要求4所述的聚乙烯塑料大棚布,其特征在于,所述中间层包括如下质量份数的组分:
聚乙烯96份、抗老化剂4份。
6.根据权利要求1所述的聚乙烯塑料大棚布,其特征在于,所述内表层包括如下质量份数的组分:
聚乙烯83~89份、含有防雾滴剂的抗老化混合物11~17份。
7.根据权利要求6所述的聚乙烯塑料大棚布,其特征在于,所述内表层包括如下质量份数的组分:
聚乙烯86份、含有防雾滴剂的抗老化混合物14份。
8.权利要求1至7任一项所述的聚乙烯塑料大棚布的制备方法,其特征在于,包括以下步骤:
S1、抗老化母粒制备,按质量份数将制备所述外表层、所述内表层和所述中间层对应的抗老化助剂按比例共混后,通过挤出机造粒得抗老化母粒;
S2、拉丝混料,将中间层所需原材料按比例混合,混合后送入高速混料机中进行均匀混合;
S3、拉丝,将S2中制得的原料送入挤出机,经过螺杆加热塑化,塑化加热的温度范围为230~280℃;再经过模头成型挤出为薄膜,经水冷却,水温在30~45℃范围内;接着用刀片将薄膜切割为胚丝,并通过设定牵伸比6~8倍,经烘箱或拉伸板拉伸成符合技术要求的扁丝,拉伸温度控制在100~120℃,扁丝再经热定型,定型温度范围在110~120℃,并调节牵伸速度及定型速度,控制热回缩率小于3%,最后调节收卷张力,由卷绕机收卷成型;
S4、编织,将S3所获扁丝由编织机编织成编织布,根据要求设定编织密度,使编织布的布面经纬均匀、平整、张力一致;
S5、淋膜,将所述编织布卷送入淋膜机进行均匀淋膜,按外表层配料淋膜一次得外表层,按内表层配料淋膜一次得内表层,得到复合塑料布;
S6、粘合,将所述复合塑料布送入热合机中粘合,热合、切割出大棚覆盖所需塑料布的宽幅与长度。
9.根据权利要求8所述的聚乙烯塑料大棚布的制备方法,其特征在于,所述步骤S4中,使编织布的布面纬线平整,无折叠,保证透明度。
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CN110525000A (zh) * 2019-08-14 2019-12-03 安徽桑尼旅游休闲用品有限公司 一种具有高隔热性的pe布
CN110846903A (zh) * 2019-11-14 2020-02-28 刘厚义 一种高强度、漫散光、防尘的大棚编织膜及其制备方法
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CN110495330A (zh) * 2019-08-14 2019-11-26 山东茂华塑料有限公司 一种新型聚乙烯塑料大棚布及其生产方法
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CN111304929A (zh) * 2020-03-07 2020-06-19 菏泽盛邦威塑料股份有限公司 一种超薄pe防火布及其制备方法
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