CN108047536A - 可降解抗静电包装袋及其制备方法 - Google Patents
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Abstract
本发明公开了一种可降解抗静电包装袋及其制备方法,属于包装材料领域。针对现有包装袋抗静电的问题,本发明的包装袋材料由以下重量份数的各组份组成,低密度聚乙烯50~70份,茂金属线型聚乙烯10~20份,壳聚糖4~8份,木质素10~20份,偶联剂5~10份,增塑剂2~5份,抗静电剂0.5~1.5份,采用本发明配方所制备的包装材料防静电性能良好,其力学性能和尺寸稳定性较好,而且材料废弃后的降解能力较为优越,对环境的污染较小。
Description
技术领域
本发明属于包装材料领域,更具体地说,涉及一种可降解抗静电包装袋及其制备方法。
背景技术
防静电包装袋是采用防静电物质制作的包装袋,也叫防静电屏蔽袋。具有自身“不起”静电和能屏蔽外界静电的特性,常用于包装对静电敏感且易被静电损坏的敏感器件,例如电子电路PCB板成品或半成品包装。
可降解塑料既具有传统塑料的功能和特性,又可在土壤和水中的微生物作用下,或通过阳光中紫外线的作用,在自然环境中分裂降解和还原,最终以无毒形式重新进入生态环境中,回归大自然。现有的防静电包装袋一般并没有可降解性,使用完之后对环境造成极大危害。
发明内容
针对现有技术的缺陷,本发明提供可降解抗静电包装袋,该包装材料防静电性能良好,而且材料的降解能力较好,对环境的污染较小。
为了解决上述问题,本发明所采用的技术方案如下:
一种可降解抗静电包装袋,由以下重量份数的各组份组成:低密度聚乙烯40~60份,聚乳酸10~15份、聚丁二酸丁二醇酯8~12份,壳聚糖4~8份,木质素10~20份,偶联剂5~10份,增塑剂2~5份,抗静电剂0.5~1.5份。
更进一步地,由以下重量份数的各组份组成:低密度聚乙烯50份,聚乳酸12份、聚丁二酸丁二醇酯10份,壳聚糖5份,木质素13份,偶联剂8份,增塑剂3份,抗静电剂1.1份。
更进一步地,所述偶联剂为硅烷偶联剂、钛酸酯偶联剂、铝酸酯偶联剂中的一种。
更进一步地,所述增塑剂为脂肪族二元醇、柠檬酸三辛酯、环氧大豆油中的一种或一种以上。
更进一步地,所述抗静电剂为己二酸-己内酰胺-聚乙二醇聚合物。
一种前述可降解抗静电包装袋的制备方法,包括以下步骤:
步骤1,将壳聚糖、木质素、偶联剂和部分增塑剂高速混匀,共混时间30~40分钟,共混转速为400~500r/min,得到混合物A;
步骤2,将低密度聚乙烯、聚乳酸、聚丁二酸丁二醇酯和其余增塑剂添加到速溶反应釜,在温度为120~140℃,搅拌速度为250~350r/min,压力为0.6~0.8MPa下,搅拌20~30分钟,得到混合物B;
步骤3,将混合物A和混合物B混合搅拌,搅拌速度350~450r/min,搅拌时间15~20分钟;
步骤4,将步骤3得到的混合料加入双螺杆挤出机,在双螺杆挤出机中熔融挤出,螺杆的各区温度设置分别为:一区165~175℃,二区175~185℃,三区185~195℃,四区195~205℃,模头温度为220~240℃,螺杆转速为45~55r/min,再经铸片缠卷、双向拉伸、冷却定型,得到发明的耐磨可降解抗静电包装材料,其中双向拉伸的温度为120~130℃,冷却定型为自然冷却。
更进一步地,所述步骤1中的增塑剂占全部增塑剂总质量的三分之一。
相比于现有技术,本发明的包装材料具有较好的防静电性能,其力学性能和尺寸稳定性较好,此外材料废弃后的降解性能较为优越,对环境的污染较小。
具体实施方式
下面结合具体实施例对本发明进一步进行描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
实施例1
一种可降解抗静电包装袋,由以下重量份数的各组份组成:低密度聚乙烯60份,聚乳酸10份、聚丁二酸丁二醇酯12份,壳聚糖8份,木质素10份,硅烷偶联剂5份,脂肪族二元醇2份,己二酸-己内酰胺-聚乙二醇聚合物1.5份。
本实施例1的可降解抗静电包装袋的制备方法为:
步骤1,将壳聚糖、木质素、偶联剂和三分之一增塑剂高速混匀,共混时间30分钟,共混转速为500r/min,得到混合物A;
步骤2,将低密度聚乙烯、聚乳酸、聚丁二酸丁二醇酯和其余三分之二增塑剂添加到速溶反应釜,在温度为120℃,搅拌速度为350r/min,压力为0.8MPa下,搅拌20分钟,得到混合物B;
步骤3,将混合物A和混合物B混合搅拌,搅拌速度350r/min,搅拌时间20分钟;
步骤4,将步骤3得到的混合料加入双螺杆挤出机,在双螺杆挤出机中熔融挤出,螺杆的各区温度设置分别为:一区165℃,二区185℃,三区185℃,四区205℃,模头温度为230℃,螺杆转速为50r/min,再经铸片缠卷、双向拉伸、冷却定型,得到发明的耐磨可降解抗静电包装材料,其中双向拉伸的温度为120℃,冷却定型为自然冷却。
实施例2
一种可降解抗静电包装袋,由以下重量份数的各组份组成:低密度聚乙烯50份,聚乳酸12份、聚丁二酸丁二醇酯10份,壳聚糖5份,木质素13份,钛酸酯偶联剂8份,柠檬酸三辛酯3份,己二酸-己内酰胺-聚乙二醇聚合物1.1份。
本实施例2的可降解抗静电包装袋的制备方法为:
步骤1,将壳聚糖、木质素、偶联剂和三分之一增塑剂高速混匀,共混时间35分钟,共混转速为450r/min,得到混合物A;
步骤2,将低密度聚乙烯、聚乳酸、聚丁二酸丁二醇酯和其余三分之二增塑剂添加到速溶反应釜,在温度为140℃,搅拌速度为250r/min,压力为0.6MPa下,搅拌30分钟,得到混合物B;
步骤3,将混合物A和混合物B混合搅拌,搅拌速度400r/min,搅拌时间18分钟;
步骤4,将步骤3得到的混合料加入双螺杆挤出机,在双螺杆挤出机中熔融挤出,螺杆的各区温度设置分别为:一区175℃,二区175℃,三区195℃,四区195℃,模头温度为220℃,螺杆转速为55r/min,再经铸片缠卷、双向拉伸、冷却定型,得到发明的耐磨可降解抗静电包装材料,其中双向拉伸的温度为125℃,冷却定型为自然冷却。
实施例3
一种可降解抗静电包装袋,由以下重量份数的各组份组成:低密度聚乙烯40份,聚乳酸15份、聚丁二酸丁二醇酯8份,壳聚糖4份,木质素20份,铝酸酯偶联剂10份,环氧大豆油5份,己二酸-己内酰胺-聚乙二醇聚合物0.5份。
本实施例3的可降解抗静电包装袋的制备方法为:
步骤1,将壳聚糖、木质素、偶联剂和三分之一增塑剂高速混匀,共混时间40分钟,共混转速为400r/min,得到混合物A;
步骤2,将低密度聚乙烯、聚乳酸、聚丁二酸丁二醇酯和其余三分之二增塑剂添加到速溶反应釜,在温度为130℃,搅拌速度为300r/min,压力为0.7MPa下,搅拌25分钟,得到混合物B;
步骤3,将混合物A和混合物B混合搅拌,搅拌速度450r/min,搅拌时间15分钟;
步骤4,将步骤3得到的混合料加入双螺杆挤出机,在双螺杆挤出机中熔融挤出,螺杆的各区温度设置分别为:一区170℃,二区180℃,三区190℃,四区200℃,模头温度为230℃,螺杆转速为45r/min,再经铸片缠卷、双向拉伸、冷却定型,得到发明的耐磨可降解抗静电包装材料,其中双向拉伸的温度为130℃,冷却定型为自然冷却。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变形,这些改进和变形也应视为本发明的保护范围。
Claims (7)
1.一种可降解抗静电包装袋,其特征在于,由以下重量份数的各组份组成:低密度聚乙烯40~60份,聚乳酸10~15份、聚丁二酸丁二醇酯8~12份,壳聚糖4~8份,木质素10~20份,偶联剂5~10份,增塑剂2~5份,抗静电剂0.5~1.5份。
2.根据权利要求1所述的可降解抗静电包装袋,其特征在于,由以下重量份数的各组份组成:低密度聚乙烯50份,聚乳酸12份、聚丁二酸丁二醇酯10份,壳聚糖5份,木质素13份,偶联剂8份,增塑剂3份,抗静电剂1.1份。
3.根据权利要求1或2所述的可降解抗静电包装袋,其特征在于,所述偶联剂为硅烷偶联剂、钛酸酯偶联剂、铝酸酯偶联剂中的一种。
4.根据权利要求3所述的可降解抗静电包装袋,其特征在于,所述增塑剂为脂肪族二元醇、柠檬酸三辛酯、环氧大豆油中的一种或一种以上。
5.根据权利要求4所述的可降解抗静电包装袋,其特征在于,所述抗静电剂为己二酸-己内酰胺-聚乙二醇聚合物。
6.一种如权利要求1~5任一项所述的可降解抗静电包装袋的制备方法,其特征在于,包括以下步骤:
步骤1,将壳聚糖、木质素、偶联剂和部分增塑剂高速混匀,共混时间30~40分钟,共混转速为400~500r/min,得到混合物A;
步骤2,将低密度聚乙烯、聚乳酸、聚丁二酸丁二醇酯和其余增塑剂添加到速溶反应釜,在温度为120~140℃,搅拌速度为250~350r/min,压力为0.6~0.8MPa下,搅拌20~30分钟,得到混合物B;
步骤3,将混合物A和混合物B混合搅拌,搅拌速度350~450r/min,搅拌时间15~20分钟;
步骤4,将步骤3得到的混合料加入双螺杆挤出机,在双螺杆挤出机中熔融挤出,螺杆的各区温度设置分别为:一区165~175℃,二区175~185℃,三区185~195℃,四区195~205℃,模头温度为220~240℃,螺杆转速为45~55r/min,再经铸片缠卷、双向拉伸、冷却定型,得到发明的耐磨可降解抗静电包装材料,其中双向拉伸的温度为120~130℃,冷却定型为自然冷却。
7.根据权利要求6所述的可降解抗静电包装袋的制备方法,其特征在于,所述步骤1中的增塑剂占全部增塑剂总质量的三分之一。
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