CN112644122A - 一种具有防静电性能的尼龙薄膜的原料以及该尼龙薄膜的生产工艺 - Google Patents
一种具有防静电性能的尼龙薄膜的原料以及该尼龙薄膜的生产工艺 Download PDFInfo
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Abstract
本发明公开了一种具有防静电性能的尼龙薄膜的原料以及该尼龙薄膜的生产工艺,包括下列重量份的原料:PA6尼龙60‑80份,低密度聚乙烯22‑30份,碳酸钙3‑5份,聚苯胺0.5‑0.9份,甲苯5‑9份,钛酸四(正)丁酯0.5‑0.9份,胶粘剂和乙炔气体,与其它处理工艺相比,工艺成熟,碳酸钙在薄膜原料中起到抗粘连剂的作用,降低黏结力,有利于摩擦系数的降低,聚苯胺由于结构中含有共轭双键,具有高的电导率,与碳酸钙相互配合,提升基膜的抗静电能力,聚乙炔膜通过聚氨酯胶粘剂与基膜复合在一起,聚乙炔膜内部包括单双键交替的共轭结构,这种聚合物成膜后导电性会提高到金属水平,复合在基膜表面,使得尼龙膜表面具有极高的导电性,进一步减少静电产生,提高尼龙薄膜的防静电能力。
Description
技术领域
本发明涉及尼龙薄膜的原料,还涉及一种具有防静电性能的尼龙薄膜的生产工艺。
背景技术
尼龙薄膜是一种非常坚韧的薄膜,透明性好,并具有良好的光泽,抗张强度、拉伸强度较高,还具有较好的耐热性、耐寒性、耐油性和耐有机溶剂性,耐磨性、耐穿刺性优良,且比较柔软,阻氧性优良,适于包装硬性物品,例如油腻性食品、肉制品、油炸食品、真空包装食品、蒸煮食品等,在生活中的运用十分广泛。
现有的尼龙薄膜生产工艺,多是采用普通的尼龙树脂进行生产,生产出来的薄膜大都为单层结构,其功能性单一,只具备基本的包覆和隔离功能,在印刷宽幅大面积薄膜时,因接触面大,产生大面积静电,若机速快,而原树脂中未掺有抗静电剂,轻则影响产品的质量,恶化劳动条件,重则可能引起火灾或爆炸事故,薄膜包覆物品后,在储运、存放过程中带静电,会使薄膜表面吸附空气中的灰尘,影响尼龙薄膜的使用体验,为此,我们提出一种具有防静电性能的尼龙薄膜的生产工艺。
发明内容
本发明的目的是为了解决现有技术中存在的缺点,而提出的一种具有防静电性能的尼龙薄膜的生产工艺,工艺成熟,在基膜生产原料中添加一定量的碳酸钙和聚苯胺,碳酸钙在薄膜原料中起到抗粘连剂的作用,在薄膜表层可以形成许多凸起,会使薄膜层与层之间、薄膜与外介面之间的实际接触面积减少,从而降低其黏结力,相互滑动就会较容易,有利于摩擦系数的降低,聚苯胺由于结构中含有共轭双键,π电子可以在分子链上自由运动,载流子迁移率很大,因而这类材料具有高的电导率,与碳酸钙相互配合,提升基膜的抗静电能力,减少静电的产生,通过甲苯和钛酸四(正)丁酯等材料通过一系列反应制成聚乙炔膜,并通过聚氨酯胶粘剂与基膜复合在一起,聚乙炔膜内部包括单双键交替的共轭结构,这种聚合物成膜后导电性会提高到金属水平,复合在基膜表面,使得尼龙膜表面具有极高的导电性,进一步减少静电产生,提高尼龙薄膜的防静电能力。
为实现上述目的,本发明提供如下技术方案:一种具有防静电性能的尼龙薄膜的原料,包括下列重量份的原料:PA6尼龙60-80份,低密度聚乙烯22-30份,碳酸钙3-5份,聚苯胺0.5-0.9份,甲苯5-9份,钛酸四(正)丁酯0.5-0.9份,胶粘剂和乙炔气体。
一种具有防静电性能的尼龙薄膜的生产工艺,,包括如下步骤:
S1、物料混合:选取PA6尼龙70份、低密度聚乙烯26份、碳酸钙4份和聚苯胺0.7份置于搅拌混合容器内进行充分的搅拌混合;
S2、熔融共混:在一定的温度下对混合后的物料进行干燥预结晶,随后进入挤出机内进行熔融共混;
S3、去杂冷却:通过熔体计量泵定量输出熔融物,通过熔体过滤器去除其中杂质,熔体通过熔体管进入铸片模头,模头流出呈粘流态的尼龙熔体,在匀速旋转的急冷辊上快速冷却至其玻璃化温度以下,形成厚度均匀的玻璃态铸片;
S4、双向拉伸:将玻璃态铸片在纵向拉伸机组中加热到高弹态下进行一定倍数的纵向拉伸,然后进入横向拉伸机,经过预热、拉幅、热定型和冷却,完成薄膜的横向拉伸得到基膜;
S5、聚乙炔成膜:将平底玻璃反应器在高纯氮气流下加入7份甲苯和0.7份钛酸四(正)丁酯,经20-30分钟陈化后冷却至-60—-80℃,,旋转反应器使催化剂溶液均匀地沾附在反应器壁上,然后迅速通入乙炔气体,此时反应器壁上立即生成一张红色的聚乙炔薄膜,聚合温度为-78℃经2-4小时,即可得到厚度为0.1mm左右的聚乙炔膜,抽去未反应完的乙炔气体以中止反应,并用甲苯将所得聚乙炔膜清洗至无色透明,真空干燥后待用;
S6、涂胶复合:在基膜表面涂覆一层胶粘剂,并将聚乙炔膜与基膜表面对齐沾覆,随后挤压即得到防静电尼龙膜。
优选的,物料混合过程中搅拌时间为2-3h,搅拌速率为700-800r/min。
优选的,熔融共混时温度为80-140℃。
本发明的技术效果和优点:
本发明工艺成熟,在基膜生产原料中添加一定量的碳酸钙和聚苯胺,碳酸钙在薄膜原料中起到抗粘连剂的作用,在薄膜表层可以形成许多凸起,会使薄膜层与层之间、薄膜与外介面之间的实际接触面积减少,从而降低其黏结力,相互滑动就会较容易,有利于摩擦系数的降低,聚苯胺由于结构中含有共轭双键,π电子可以在分子链上自由运动,载流子迁移率很大,因而这类材料具有高的电导率,与碳酸钙相互配合,提升基膜的抗静电能力,减少静电的产生,通过甲苯和钛酸四(正)丁酯等材料通过一系列反应制成聚乙炔膜,并通过聚氨酯胶粘剂与基膜复合在一起,聚乙炔膜内部包括单双键交替的共轭结构,这种聚合物成膜后导电性会提高到金属水平,复合在基膜表面,使得尼龙膜表面具有极高的导电性,进一步减少静电产生,提高尼龙薄膜的防静电能力。
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,以下结合具体实施例,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。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种具有防静电性能的尼龙薄膜的原料,包括下列重量份的原料:PA6尼龙70份,低密度聚乙烯26份,碳酸钙4份,聚苯胺0.7份,甲苯7份,钛酸四(正)丁酯0.7份,胶粘剂和乙炔气体。
一种具有防静电性能的尼龙薄膜的生产工艺,包括如下步骤:
S1、物料混合:选取PA6尼龙70份、低密度聚乙烯26份、碳酸钙4份和聚苯胺0.7份置于搅拌混合容器内进行充分的搅拌混合;
S2、熔融共混:在一定的温度下对混合后的物料进行干燥预结晶,随后进入挤出机内进行熔融共混;
S3、去杂冷却:通过熔体计量泵定量输出熔融物,通过熔体过滤器去除其中杂质,熔体通过熔体管进入铸片模头,模头流出呈粘流态的尼龙熔体,在匀速旋转的急冷辊上快速冷却至其玻璃化温度以下,形成厚度均匀的玻璃态铸片;
S4、双向拉伸:将玻璃态铸片在纵向拉伸机组中加热到高弹态下进行一定倍数的纵向拉伸,然后进入横向拉伸机,经过预热、拉幅、热定型和冷却,完成薄膜的横向拉伸得到基膜;
S5、聚乙炔成膜:将平底玻璃反应器在高纯氮气流下加入7份甲苯和0.7份钛酸四(正)丁酯,经25分钟陈化后冷却至-70℃,,旋转反应器使催化剂溶液均匀地沾附在反应器壁上,然后迅速通入乙炔气体,此时反应器壁上立即生成一张红色的聚乙炔薄膜,聚合温度为-78℃经3小时,即可得到厚度为0.1mm左右的聚乙炔膜,抽去未反应完的乙炔气体以中止反应,并用甲苯将所得聚乙炔膜清洗至无色透明,真空干燥后待用;
S6、涂胶复合:在基膜表面涂覆一层胶粘剂,并将聚乙炔膜与基膜表面对齐沾覆,随后挤压即得到防静电尼龙膜。
优选的,物料混合过程中搅拌时间为2.5h,搅拌速率为750r/min。
优选的,熔融共混时温度为110℃。
实施例2
一种具有防静电性能的尼龙薄膜的原料,包括下列重量份的原料:PA6尼龙60份,低密度聚乙烯22份,碳酸钙3份,聚苯胺0.5份,甲苯5份,钛酸四(正)丁酯0.5份,胶粘剂和乙炔气体。
一种具有防静电性能的尼龙薄膜的生产工艺,包括如下步骤:
S1、物料混合:选取PA6尼龙60份、低密度聚乙烯22份、碳酸钙3份和聚苯胺0.5份置于搅拌混合容器内进行充分的搅拌混合;
S2、熔融共混:在一定的温度下对混合后的物料进行干燥预结晶,随后进入挤出机内进行熔融共混;
S3、去杂冷却:通过熔体计量泵定量输出熔融物,通过熔体过滤器去除其中杂质,熔体通过熔体管进入铸片模头,模头流出呈粘流态的尼龙熔体,在匀速旋转的急冷辊上快速冷却至其玻璃化温度以下,形成厚度均匀的玻璃态铸片;
S4、双向拉伸:将玻璃态铸片在纵向拉伸机组中加热到高弹态下进行一定倍数的纵向拉伸,然后进入横向拉伸机,经过预热、拉幅、热定型和冷却,完成薄膜的横向拉伸得到基膜;
S5、聚乙炔成膜:将平底玻璃反应器在高纯氮气流下加入5份甲苯和0.5份钛酸四(正)丁酯,经20分钟陈化后冷却至-60℃,,旋转反应器使催化剂溶液均匀地沾附在反应器壁上,然后迅速通入乙炔气体,此时反应器壁上立即生成一张红色的聚乙炔薄膜,聚合温度为-78℃经2小时,即可得到厚度为0.1mm左右的聚乙炔膜,抽去未反应完的乙炔气体以中止反应,并用甲苯将所得聚乙炔膜清洗至无色透明,真空干燥后待用;
S6、涂胶复合:在基膜表面涂覆一层胶粘剂,并将聚乙炔膜与基膜表面对齐沾覆,随后挤压即得到防静电尼龙膜。
优选的,物料混合过程中搅拌时间为2h,搅拌速率为700r/min。
优选的,熔融共混时温度为80℃。
实施例3
一种具有防静电性能的尼龙薄膜的原料,包括下列重量份的原料:PA6尼龙80份,低密度聚乙烯30份,碳酸钙5份,聚苯胺0.9份,甲苯9份,钛酸四(正)丁酯0.9份,胶粘剂和乙炔气体。
一种具有防静电性能的尼龙薄膜的生产工艺,包括如下步骤:
S1、物料混合:选取PA6尼龙80份、低密度聚乙烯30份、碳酸钙5份和聚苯胺0.9份置于搅拌混合容器内进行充分的搅拌混合;
S2、熔融共混:在一定的温度下对混合后的物料进行干燥预结晶,随后进入挤出机内进行熔融共混;
S3、去杂冷却:通过熔体计量泵定量输出熔融物,通过熔体过滤器去除其中杂质,熔体通过熔体管进入铸片模头,模头流出呈粘流态的尼龙熔体,在匀速旋转的急冷辊上快速冷却至其玻璃化温度以下,形成厚度均匀的玻璃态铸片;
S4、双向拉伸:将玻璃态铸片在纵向拉伸机组中加热到高弹态下进行一定倍数的纵向拉伸,然后进入横向拉伸机,经过预热、拉幅、热定型和冷却,完成薄膜的横向拉伸得到基膜;
S5、聚乙炔成膜:将平底玻璃反应器在高纯氮气流下加入9份甲苯和0.9份钛酸四(正)丁酯,经30分钟陈化后冷却至-80℃,,旋转反应器使催化剂溶液均匀地沾附在反应器壁上,然后迅速通入乙炔气体,此时反应器壁上立即生成一张红色的聚乙炔薄膜,聚合温度为-78℃经4小时,即可得到厚度为0.1mm左右的聚乙炔膜,抽去未反应完的乙炔气体以中止反应,并用甲苯将所得聚乙炔膜清洗至无色透明,真空干燥后待用;
S6、涂胶复合:在基膜表面涂覆一层胶粘剂,并将聚乙炔膜与基膜表面对齐沾覆,随后挤压即得到防静电尼龙膜。
优选的,物料混合过程中搅拌时间为3h,搅拌速率为800r/min。
优选的,熔融共混时温度为140℃。
综上所述:本发明提供的一种具有防静电性能的尼龙薄膜的生产工艺,与其它处理工艺相比,具备以下优点:工艺成熟,在基膜生产原料中添加一定量的碳酸钙和聚苯胺,碳酸钙在薄膜原料中起到抗粘连剂的作用,在薄膜表层可以形成许多凸起,会使薄膜层与层之间、薄膜与外介面之间的实际接触面积减少,从而降低其黏结力,相互滑动就会较容易,有利于摩擦系数的降低,聚苯胺由于结构中含有共轭双键,π电子可以在分子链上自由运动,载流子迁移率很大,因而这类材料具有高的电导率,与碳酸钙相互配合,提升基膜的抗静电能力,减少静电的产生,通过甲苯和钛酸四(正)丁酯等材料通过一系列反应制成聚乙炔膜,并通过聚氨酯胶粘剂与基膜复合在一起,聚乙炔膜内部包括单双键交替的共轭结构,这种聚合物成膜后导电性会提高到金属水平,复合在基膜表面,使得尼龙膜表面具有极高的导电性,进一步减少静电产生,提高尼龙薄膜的防静电能力。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (4)
1.一种具有防静电性能的尼龙薄膜的原料,其特征在于:包括下列重量份的原料:PA6尼龙60-80份,低密度聚乙烯22-30份,碳酸钙3-5份,聚苯胺0.5-0.9份,甲苯5-9份,钛酸四(正)丁酯0.5-0.9份,胶粘剂和乙炔气体。
2.一种具有防静电性能的尼龙薄膜的生产工艺,其特征在于:包括如下步骤:
S1、物料混合:选取PA6尼龙70份、低密度聚乙烯26份、碳酸钙4份和聚苯胺0.7份置于搅拌混合容器内进行充分的搅拌混合;
S2、熔融共混:在一定的温度下对混合后的物料进行干燥预结晶,随后进入挤出机内进行熔融共混;
S3、去杂冷却:通过熔体计量泵定量输出熔融物,通过熔体过滤器去除其中杂质,熔体通过熔体管进入铸片模头,模头流出呈粘流态的尼龙熔体,在匀速旋转的急冷辊上快速冷却至其玻璃化温度以下,形成厚度均匀的玻璃态铸片;
S4、双向拉伸:将玻璃态铸片在纵向拉伸机组中加热到高弹态下进行一定倍数的纵向拉伸,然后进入横向拉伸机,经过预热、拉幅、热定型和冷却,完成薄膜的横向拉伸得到基膜;
S5、聚乙炔成膜:将平底玻璃反应器在高纯氮气流下加入7份甲苯和0.7份钛酸四(正)丁酯,经20-30分钟陈化后冷却至-60—-80℃,,旋转反应器使催化剂溶液均匀地沾附在反应器壁上,然后迅速通入乙炔气体,此时反应器壁上立即生成一张红色的聚乙炔薄膜,聚合温度为-78℃经2-4小时,即可得到厚度为0.1mm左右的聚乙炔膜,抽去未反应完的乙炔气体以中止反应,并用甲苯将所得聚乙炔膜清洗至无色透明,真空干燥后待用;
S6、涂胶复合:在基膜表面涂覆一层胶粘剂,并将聚乙炔膜与基膜表面对齐沾覆,随后挤压即得到防静电尼龙膜。
3.根据权利要求2所述的一种具有防静电性能的尼龙薄膜的生产工艺,其特征在于:物料混合过程中搅拌时间为2-3h,搅拌速率为700-800r/min。
4.根据权利要求2所述的一种具有防静电性能的尼龙薄膜的生产工艺,其特征在于:熔融共混时温度为80-140℃。
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