CN111808387A - 一种聚氯乙烯地膜及制备方法 - Google Patents
一种聚氯乙烯地膜及制备方法 Download PDFInfo
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 38
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
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- 239000000155 melt Substances 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
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- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 9
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- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J5/18—Manufacture of films or sheets
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01G13/00—Protecting plants
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Abstract
本发明公开了一种聚氯乙烯地膜的配方及制备方法,配方由如下重量份的各组分组成:聚氯乙烯100份,增塑剂20~50份,稳定剂1~3份,开口剂0.1~1份,抗紫外线剂0.5~2份,抗氧剂0.1~2份。本发明公开的聚氯乙烯地膜的制备方法包括以下步骤:称取聚氯乙烯100份,增塑剂20~50份,稳定剂1~3份,开口剂0.1~1份,抗紫外线剂0.5~2份,抗氧剂0.1~2份;在混合机中混合,混合好的粉料进入塑化装置中,在其中进行熔融塑化,熔体进入挤出机中,升温后的熔体挤压进入层叠器,在层叠器中经过分割、扭转、展宽、汇合等过程,实现多层复合的层叠效果,在切粒装置的作用下,制得母粒;由母粒挤出制得薄膜产品。本发明制备的聚氯乙烯地膜具有厚度薄、强度高、阻隔及保温性能好、塑化剂迁移率低等特点。
Description
技术领域
本发明属于高分子材料先进制造技术领域,涉及一种聚氯乙烯(PVC)地膜的配方及制备方法。
背景技术
地膜即地面覆盖薄膜,通常是透明或黑色PE薄膜,也有绿、银色薄膜,用于地面覆盖,以提高土壤温度,保持土壤水分,维持土壤结构,防止害虫侵袭作物和某些微生物引起的病害等,促进植物生长的功能。目前国内的聚氯乙烯(PVC)的地膜还是很少,更多的是采用聚乙烯(PE)为原料来生产农用地膜。PE地膜不抗寒,也不抗老化,易裂口,寿命只有一年,而且地膜韧性极低,力学强度不足,残膜遍地却不易腐烂,影响环境美观,对土壤也造成严重污染。
发明内容
本发明的目的在于克服以上技术缺陷,提供一种聚氯乙烯(PVC)地膜的配方体系,另外还提供了一种可大规模推广的聚氯乙烯地膜的制备方法。
本发明的技术方案如下:本发明提供了一种聚氯乙烯地膜,该原料配方由如下重量份的各组分组成:
所述的聚氯乙烯是指1500-1350聚合度牌号为SG-3的树脂。
所述的增塑剂是指邻苯二甲酸二辛酯(DOP)、对苯二甲酸二辛酯(DOTP)和邻苯二甲酸二丁酯(DBP)有机酯类化合物中的一种。
所述的稳定剂是指三盐基硫酸铅、钙\锌复合稳定剂、有机锡化合物和稀土复合稳定剂中的至少一种。稳定剂可以降低PVC的熔融温度,缩短熔融时间,从而提高加工速率,并得到结构均一,表面光泽的高质量PVC制品。具有良好的化学稳定性和热塑性。
所述的开口剂是指滑石粉、油酸酰胺有机物、二氧化硅中的一种。开口剂可以减少树脂等在加工过程中的薄膜和传送设备之间摩擦,简化对最终产品的操作,从而增加生产量。
所述的抗紫外线剂是指2-羟基-4-正辛氧基二苯甲酮和2-羟基-4-甲氧基二苯甲酮中的一种。
所述的抗氧剂是指(r-3,5二叔丁基苯基)酯和二缩三乙二醇双[β-(3-叔丁基-4-羟基-5-甲基苯基)丙酸酯]中的一种。
本发明还提供了一种上述聚氯乙烯地膜的制备方法,该方法包括以下步骤:在传动装置的作用下,混合好的粉料进入塑化装置中,在其中进行熔融塑化,熔体进入挤出机中,升温后的熔体挤压进入层叠器,在层叠器中,经过分割、扭转、展宽、汇合等过程,实现多层复合的层叠效果,在切粒装置的作用下,制得母粒。之后,在挤出装置中加入制得的母粒,进行熔融塑化,熔体经过挤出装置进入到吹膜机头中,通过吹膜机头的特定的流道,挤出吹泡,在牵引装置作用下,膜管通过展平装置变为双层的薄膜片材,经过分切装置对薄膜进行切割,在卷取设备作用下,进行收卷制得成品。
由以上技术方案可知,本发明具有如下优点:(1)利用纳米层叠技术使生产出来的地膜产品厚度薄、强度高、阻隔及保温性能好,综合改良了各项性能,能应对复杂的气候条件。(2)同时可以使助剂分散均匀,不使其迁移,避免土壤污染。(3)本发明可收回特性可以解决传统PE地膜大量残膜遗留的问题,并可以对PVC材料进行再次加工,利用率可达到百分之五十左右,符合环境的发展需求。
具体实施方式
下面结合具体实施例对本发明作进一步详细的描述,但本发明的实施方式不限于此。下述实施方式中所使用的实验方法如无特殊说明,均为常规方法,所使用的原料、试剂和设备等,如无特殊说明,均为可从常规采购等商业途径得到的原料、试剂和设备。
实施例:称取干燥的PVC100份,邻苯二甲酸二辛酯(DOP)有机酯类化合物35份,三盐基硫酸铅2.2份,油酸酰胺有机物0.5份,2-羟基-4-正辛氧基二苯甲酮1份,(r-3,5二叔丁基苯基)酯0.5份。在混料机中混合,将混合均匀的物料加入到行星螺杆挤出机,在其中进行熔融塑化,在极短时间内实现的物料捏合、挤压、剪切交换,熔体进入单螺杆挤出机中,通过设定的温度,使熔体在其中完成升温操作,升温后的熔体挤压进入层叠器,在层叠器中,经过分割、扭转、展宽、汇合等过程,实现多层复合的层叠效果,片材通过自然冷却后,在切粒机的作用下,制得母粒。在吹膜生产过程中,在挤出机中加入制得的母粒,进行熔融塑化,熔体经过挤出装置进入到吹膜机头中,通过吹膜机头的特定的流道,挤出吹泡,在牵引装置作用下,膜管通过展平装置变为双层的薄膜片材,经过分切装置对薄膜两边进行切割,在卷取设备作用下,进行收卷制得具有本例中配方体系的地膜成品。
本发明涉及的一种聚氯乙烯地膜的配方,其原料配方由如下重量份的各组分组成:聚氯乙烯100份,增塑剂20~50份,稳定剂1~3份,开口剂0.1~1份,抗紫外线剂0.5~2份,抗氧剂0.1~2份。所述的聚氯乙烯是指1500-1350聚合度牌号为SG-3的树脂。所述的增塑剂是指邻苯二甲酸二辛酯(DOP)、对苯二甲酸二辛酯(DOTP)和邻苯二甲酸二丁酯(DBP)有机酯类化合物中的一种。所述的稳定剂是指三盐基硫酸铅、钙\锌复合稳定剂、有机锡化合物和稀土复合稳定剂中的至少一种。稳定剂可以降低PVC的熔融温度,缩短熔融时间,从而提高加工速率,并得到结构均一,表面光泽的高质量PVC制品。具有良好的化学稳定性和热塑性。所述的开口剂是指滑石粉、油酸酰胺有机物、二氧化硅中的一种。开口剂可以减少树脂等在加工过程中的薄膜和传送设备之间摩擦,简化对最终产品的操作,从而增加生产量。所述的抗紫外线剂是指2-羟基-4-正辛氧基二苯甲酮和2-羟基-4-甲氧基二苯甲酮中的一种。所述的抗氧剂是指(r-3,5二叔丁基苯基)酯和二缩三乙二醇双[β-(3-叔丁基-4-羟基-5-甲基苯基)丙酸酯]中的一种。
本发明涉及的一种聚氯乙烯地膜的制备方法,在熔体进入层叠器中,经过分割、扭转、展宽、汇合等过程,实现多层复合的层叠效果,具有厚度薄、强度高、阻隔及保温性能好等特点,提高了其力学性能。同时可以使助剂分散均匀,不使其迁移,避免土壤污染。
上述的对实施例的描述是为了便于该技术领域的普通技术人员能理解和应用本发明,熟悉本领域技术的人员显然可以容易地对上述实施例作出各种修改,并把在此说明的一般原理应用到其他实施方式中而不必经过创新性的劳动。因此,本发明不限于上述的实施例,本领域技术人员根据本发明的揭示,不脱离本发明的范畴所做的改进和修改都应该在本发明的保护范围之内。
Claims (9)
1.一种聚氯乙烯地膜,其特征在于:该原料配方由如下重量份的各组分组成:聚氯乙烯100份,增塑剂20~50份,稳定剂1~3份,开口剂0.1~1份,抗紫外线剂0.5~2份,抗氧剂0.1~2份。
2.根据权利要求1所述的一种聚氯乙烯地膜,其特征在于:所述的聚氯乙烯是指聚合度为1500-1350。
3.根据权利要求1所述的一种聚氯乙烯地膜,其特征在于:所述的增塑剂是指邻苯二甲酸二辛酯、对苯二甲酸二辛酯和邻苯二甲酸二丁酯有机酯类化合物中的一种。
4.根据权利要求1所述的一种聚氯乙烯地膜,其特征在于:所述的稳定剂是指三盐基硫酸铅、钙\锌复合稳定剂、有机锡化合物和稀土复合稳定剂中的至少一种。
5.根据权利要求1所述的一种聚氯乙烯地膜,其特征在于:所述的开口剂是指滑石粉、油酸酰胺有机物、二氧化硅中的一种。
6.根据权利要求1所述的一种聚氯乙烯地膜,其特征在于:所述的抗紫外线剂是指2-羟基-4-正辛氧基二苯甲酮和2-羟基-4-甲氧基二苯甲酮中的一种。
7.根据权利要求1所述的一种聚氯乙烯地膜,其特征在于:所述的抗氧剂是指(r-3,5二叔丁基苯基)酯和二缩三乙二醇双[β-(3-叔丁基-4-羟基-5-甲基苯基)丙酸酯]中的一种。
8.根据权利要求1至7任一所述的聚氯乙烯地膜的制备方法,其特征在于:该制备方法包括以下步骤:称取聚氯乙烯100份,增塑剂20~50份,稳定剂1~3份,开口剂0.1~1份,抗紫外线剂0.5~2份,抗氧剂0.1~2份,在混合机中混合,混合好的粉料进入塑化装置中,在其中进行熔融塑化,熔体进入挤出机中,升温后的熔体挤压进入层叠器,在层叠器中,经过分割、扭转、展宽、汇合等过程,实现多层复合的层叠效果,在切粒装置的作用下,制得母粒;之后,在挤出装置中加入制得的母粒,进行熔融塑化,熔体经过挤出装置进入到吹膜机头中,通过吹膜机头的特定的流道,挤出吹泡,在牵引装置作用下,膜管通过展平装置变为双层的薄膜片材,经过分切装置对薄膜进行切割,在卷取设备作用下,进行收卷制得成品。
9.根据权利要求8所述的一种聚氯乙烯地膜的制备方法,其特征在于:在熔体进入层叠器中,经过分割、扭转、展宽、汇合等过程,实现多层复合的层叠效果。
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