CN111518329A - 一种白炭黑作储油缓释剂的高含量防雾母粒及其生产工艺 - Google Patents
一种白炭黑作储油缓释剂的高含量防雾母粒及其生产工艺 Download PDFInfo
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Abstract
本发明公开了这样一种白炭黑作储油缓释剂的高含量防雾母粒及其生产工艺,专门用于防雾时效要求长,防雾效果要求极高的菌菇类等果蔬防雾保鲜袋。本发明采取先将重量配比为34‑63的塑料PE载体、10‑30的白炭黑储油缓释剂、0.1‑0.12的抗氧剂分别计量投入搅拌机桶内进行混合预处理,然后投入0.5‑1.5的改性剂、0.5‑1.0的分散剂进行表面包覆处理,最后投入25‑32的防雾剂、1.0‑1.5的开口剂进行聚集处理,上述材料经搅拌机充分混合处理后,再经双螺杆造粒机熔融、塑化、挤出,最后风冷冷却切粒成高含量防雾母粒成品。
Description
技术领域
本发明涉及一种防雾母粒,尤其涉及一种白炭黑作储油缓释剂的高含量防雾母粒及其生产工艺。
背景技术
目前,国内现有果蔬PE(聚乙烯)防雾母粒防雾剂成分含量都在12%至18%之间,因为防雾剂原料品种超过一半是油性液体状的表面活性剂或乳化剂,当成分含量高达18%时,防雾母粒普遍存在返油(吐油)现象,尤其是夏天炎热时返油更严重。返油多的防雾母粒对下游厂家加工时容易造成螺杆打滑,膜泡摇摆不定,吹出的膜厚薄不均匀,无法形成合格防雾膜、袋产品。如理研(日本)、山东淄博金辰、金源塑胶等国内外厂家的防雾剂有效成分也都是控制在18%以下。又如中国专利CN102286174A公开了一种润滑防雾母料及其生产工艺,其主材料塑料载体是聚丙烯,防雾剂含量为12~18。
无机粉体改性行业周知,无机粉体具有较大吸油功能,可以作储油缓释剂,而对于现有绝大部分没有涉及过无机粉体改性技术的防雾母粒行业厂家仍然还处于单一追求透明度上做文章状态。常态下,无机中碳酸钙粉体等比表面积小的粉体表面好处理,吹出的膜面不会有晶点,却又存在遮盖率太大的问题,后续吹出的膜不透明。唯有比表面积巨大(100~400m2∕g)属多孔物质的白炭黑,对聚烯烃类聚丙烯而言,可作成核剂,学理上添加少量白炭黑可促进聚丙烯膜结晶更透明。对聚乙烯而言,学理上表述的是添加白炭黑可作消光剂(粉),吹出的膜透明度受到影响较大,终因” 消光剂” 字眼的表述和白炭黑比表面积巨大、轻飘飘的粉体不好处理,稍有不慎后续膜面晶点成片,导致膜面晶点问题难以解决。因此,现有聚乙烯作载体的防雾母粒行业,至今还没有防雾母粒既用聚乙烯作载体,同时又用白炭黑作储油缓释剂,更没有防雾剂含量超出20%的防雾母粒。显然,由于现行的防雾母料没有储油缓释剂作支撑,防雾剂成分含量固然低于20%,故经一种防雾测试方法,经破坏性开水冲洗过一次后,待存放15天后再测试,结果防雾膜没有防雾剂迂移释放功能而失去防雾功能,存在防雾时效短的缺陷。
发明内容
本发明的目的是提供一种母粒干爽,吹膜螺杆不打滑、膜不会存在晶点,好开口、透明度影响小,防雾时效长(一次性破坏性开水冲洗后,存放15天后再检测,照样有防雾剂外迁移,仍然有防雾效果),能满足防雾保鲜要求高的菌菇防雾保鲜袋等功能膜质量要求的一种白炭黑作储油缓释剂的高含量防雾母粒及其生产工艺。
为达到上述目的,本发明一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于它是由下述重量配比组成的:塑料PE载体34-63, 白炭黑储油缓释剂10-30,防雾剂25-32,改性剂 0.5-1.5,分散剂0.5-1.0,开口剂1.0-1.5,抗氧剂0.1-0.12。
所述白炭黑储油缓释剂可以是沉淀法白炭黑、气相法白炭黑的其中一种或其混合复配物。
所述防雾剂可以是聚氧乙烯醚、改性硅油、单甘脂等表面活性剂及乳化剂的其中一种或多种复配剂。
所述改性剂可以是硅烷偶联剂、钛酸酯偶联剂、铝酸酯偶联剂的其中一种。
所述分散剂可以是硬脂酸、聚乙烯蜡、聚氧乙烯蜡的一种或多种混合物。
所述开口剂可以是芥酸酰胺、油酸酰胺的一种或两种混合物。
一种白炭黑作储油缓释剂的高含量防雾母粒的生产工艺,先将重量配比为34-63的塑料PE载体、10-30的白炭黑储油缓释剂、0.1-0.12的抗氧剂分别计量投入搅拌机桶内进行混合预处理,然后投入0.5-1.5的改性剂、0.5-1.0的分散剂进行表面包覆处理,最后投入25-32的防雾剂、1.0-1.5的开口剂进行聚集处理,上述材料经搅拌机充分混合处理后,再经双螺杆造粒机熔融、塑化、挤出,最后风冷冷却切粒成高含量防雾母粒成品。
所述双螺杆造粒机的挤出机生产各段区间温度,根据塑料载体自身熔融温度物性指标确定,PE载体熔融、塑化段(1至6区)的温度为170-175℃;熔融、塑化过度段(7区)的温度为145-155℃;塑化冷却段(8至11区)的温度为135-140℃;模头(12区)温度为125-135℃,挤出机转速、电流、模头压力等根据载体物料的流动性调控确定。
本发明的有益效果是:本发明通过对比表面积巨大、颗粒微小轻飘不好处理的白炭黑,采取按分别先后进行部分材料预处理、表面包覆处理、聚集处理的三步骤处理法进行物料改性处理,更加有效地增加和提高了无机粉体与有机物的接触界面及分散性,因此,具有母粒干爽,吹出的膜不会存在晶点等优点。与没有白炭黑储油缓释剂成分的普通防雾母粒相比,本发明吹出的膜经破坏性冲冼后照样能防雾,在低温摄氏–2℃左右时,时效仍然较长,能满足防雾保鲜技术要求高的菌菇防雾袋防雾,还能满足胡萝卜等蔬菜防雾袋在气温降到零下16度左右时照样能达到防雾保鲜要求,为高塞冷地区的果蔬防雾保鲜提供保障,有效提高寒冬季节果蔬的防雾保鲜程度,大幅度提高经济效益。
附图说明 下面结合附图和实施例对本发明作进一步的详细说明。
附图1是本发明一种白炭黑作储油缓释剂的高含量防雾母粒及其生产工艺中双螺杆造粒机的主视示意图。
具体实施方式
实施例1
先将塑料PE载体34、白炭黑储油缓释剂30、抗氧剂0.11分别计量投入搅拌机进行混合预处理,然后投入改性剂1.5、分散剂1.0进行表面包覆处理,最后投入32的防雾剂、1.5的开口剂进行混合聚集处理,上述材料经搅拌机充分聚集处理后,再经双螺杆造粒机熔融、塑化、挤出。附图1所示双螺杆造粒机熔融、塑化段(1至6区)的温度为170℃;熔融、塑化过度段(7区)的温度为150℃;塑化冷却段(8至11区)温度为140℃;模头(12区)温度为130℃,挤出机转速、电流、模头压力等根据载体物料的流动性调控确定;最后风冷冷却切粒成高含量防雾母粒产品。
实施例2
先将塑料PE载体63、白炭黑储油缓释剂10、抗氧剂0.1分别计量投入搅拌机进行混合预处理,然后投入改性剂0.5、分散剂0.5进行表面包覆处理,最后投入25的防雾剂、1.0的开口剂进行混合聚集处理,上述材料经搅拌机充分聚集处理后,再经双螺杆造粒机熔融、塑化、挤出。附图1所示双螺杆造粒机熔融、塑化段(1至6区)的温度为175℃;熔融、塑化过度段(7区)的温度为155℃;塑化冷却段(8至11区)温度为135℃;模头(12区)温度为125℃,挤出机转速、电流、模头压力等根据载体物料的流动性调控确定。最后风冷冷却切粒成高含量防雾母粒产品。
实施例3
先将塑料PE载体48.5、白炭黑储油缓释剂20、抗氧剂0.1分别计量投入搅拌机进行混合预处理,然后投入改性剂1.0、分散剂0.75进行表面包覆处理,最后投入28.5的防雾剂、1.25的开口剂进行混合聚集处理,上述材料经搅拌机充分聚集处理后,再经双螺杆造粒机熔融、塑化、挤出。附图1所示双螺杆造粒机熔融、塑化段(1至6区)的温度为173℃;熔融、塑化过度段(7区)的温度为153℃;塑化冷却段(8至11区)温度为138℃;模头(12区)温度为130℃,挤出机转速、电流、模头压力等根据载体物料的流动性调控确定。最后风冷冷却切粒成高含量防雾母粒产品。
以上所公开的仅为本发明最佳实施例而已,不能以此来限定本发明之权利范围,因此依本发明权利要求所作的等同变化,仍属于本发明所涵盖的范围。
Claims (8)
1.一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于它是由下述重量配比组成的:塑料PE载体34-63, 白炭黑储油缓释剂10-30,防雾剂25-32,改性剂 0.5-1.5,分散剂0.5-1.0,开口剂1.0-1.5,抗氧剂0.1-0.12。
2.根据权利要求1所述的一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于:所述白炭黑储油缓释剂可以是沉淀法白炭黑、气相法白炭黑的其中一种或其混合复配物。
3.根据权利要求1所述的一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于:所述防雾剂可以是聚氧乙烯醚、改性硅油、单甘脂等表面活性剂及乳化剂的其中一种或多种复配剂。
4.根据权利要求1所述的一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于:所述改性剂可以是硅烷偶联剂、钛酸酯偶联剂、铝酸酯偶联剂的其中一种。
5.根据权利要求1所述的一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于:所述分散剂可以是硬脂酸、聚乙烯蜡、聚氧乙烯蜡的一种或多种混合物。
6.根据权利要求1所述的一种白炭黑作储油缓释剂的高含量防雾母粒,其特征在于:所述开口剂可以是芥酸酰胺、油酸酰胺的一种或两种混合物。
7.一种白炭黑作储油缓释剂的高含量防雾母粒的生产工艺,其特征在于:先将重量配比为34-63的塑料PE载体、10-30的白炭黑储油缓释剂、0.1-0.12的抗氧剂分别计量投入搅拌机桶内进行混合预处理,然后投入0.5-1.5的改性剂、0.5-1.0的分散剂进行表面包覆处理,最后投入25-32的防雾剂、1.0-1.5的开口剂进行聚集处理,上述材料经搅拌机充分混合处理后,再经双螺杆造粒机熔融、塑化、挤出,最后风冷冷却切粒成高含量防雾母粒成品。
8.根据权利要求7所述的一种白炭黑作储油缓释剂的高含量防雾母粒的生产工艺,其特征在于:所述双螺杆造粒机的挤出机生产各段区间温度,根据塑料载体自身熔融温度物性指标确定, PE载体熔融、塑化段的温度为170-175℃;熔融、塑化过度段的温度为145-155℃;塑化冷却段的温度为135-140℃;模头温度为125-135℃,挤出机转速、电流、模头压力等根据载体物料的流动性调控确定。
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