CN111909456A - 环保可降解消光膜 - Google Patents
环保可降解消光膜 Download PDFInfo
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- 230000008033 biological extinction Effects 0.000 title claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- 239000002344 surface layer Substances 0.000 claims abstract description 35
- 239000004743 Polypropylene Substances 0.000 claims abstract description 34
- 229920001038 ethylene copolymer Polymers 0.000 claims abstract description 34
- 229920001155 polypropylene Polymers 0.000 claims abstract description 34
- -1 polypropylene Polymers 0.000 claims abstract description 33
- 239000012792 core layer Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 21
- 239000010410 layer Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- 239000012748 slip agent Substances 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 8
- 229920006237 degradable polymer Polymers 0.000 claims description 8
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 8
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 8
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 8
- 239000004626 polylactic acid Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 7
- 235000013539 calcium stearate Nutrition 0.000 claims description 7
- 239000008116 calcium stearate Substances 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 239000004632 polycaprolactone Substances 0.000 claims description 6
- 229920001610 polycaprolactone Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 5
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 claims description 5
- 229920005615 natural polymer Polymers 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 229920002101 Chitin Polymers 0.000 claims description 2
- 239000002981 blocking agent Substances 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 150000004676 glycans Chemical class 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 102000004169 proteins and genes Human genes 0.000 claims description 2
- 108090000623 proteins and genes Proteins 0.000 claims description 2
- 229920000747 poly(lactic acid) Polymers 0.000 description 4
- 229940063655 aluminum stearate Drugs 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
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- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 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 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
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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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- B32—LAYERED PRODUCTS
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B32B27/00—Layered products comprising a layer of synthetic resin
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- B32B2307/716—Degradable
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
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- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
本发明公开了环保可降解消光膜,其包括:上表层,所述表层由聚丙烯树脂、PVC树脂、乙烯共聚物、可降解高分子、防粘连剂及爽滑剂制得;芯层,所述芯层由聚丙烯树脂及乙烯共聚物制得;以及下表层,所述下表层由消光料、爽滑剂、聚丙烯树脂及乙烯共聚物制得。本发明的环保可降解消光膜既保存了原消光膜的优点,又可降解,是一种绿色环保的薄膜。
Description
领域
本发明涉及塑料薄膜领域,特别涉及环保可降解消光膜。
背景
消光膜是一种低光泽高雾度或漫反射消光效果的薄膜,薄膜表面具有非常低的光泽,其表面反射光弱。
但是,目前可降解消光膜存在不可降解或降解率低的缺陷,并且可降解消光膜的研发生产水平和使用率还比较低。
因此,市场亟需环保可降解消光膜。
概述
本公开涉及环保可降解消光膜,其包括:
上表层,所述表层由聚丙烯树脂、PVC树脂、乙烯共聚物、可降解高分子、防粘连剂及爽滑剂制得;
芯层,所述芯层由聚丙烯树脂及乙烯共聚物制得;以及
下表层,所述下表层由消光料、爽滑剂、聚丙烯树脂及乙烯共聚物制得。
详述
在以下的说明中,包括某些具体的细节以对各个公开的实施方案提供全面的理解。然而,相关领域的技术人员会认识到,不采用一个或多个这些具体的细节,而采用其他方法、部件、材料等的情况下仍实现实施方案。
除非本公开中另有要求,在整体说明书和所附的权利要求中,词语“包括”、“包含”、“含有”和“具有”应解释为开放式的、含括式的意义,即“包括但不限于”。
在整体说明书中提到的“一实施方案”、“实施方案”、“在另一实施方案中”或“在某些实施方案中”意指在至少一实施方案中包括与该实施方案所述的相关的具体参考要素、结构或特征。因此,在整个说明书中不同位置出现的短语“在一实施方案中”或“在实施方案中”或“在另一实施方案中”或“在某些实施方案中”不必全部指同一实施方案,此外,具体要素、结构或特征可以任何适当的方式在一个或多个实施方案中结合。
定义
在本公开中,术语“聚丙烯树脂”是指一种结构规整的结晶性聚合物,为淡乳白色粒料、无味、无毒、质轻的热塑性树脂。其具备机械性能良好,耐热性能良好及化学稳定性好的优点。
在本公开中,术语“PVC树脂”是指一种极性非结晶性高聚物,其分子间有较强的作用力,是一种坚硬而脆的材料,其抗冲击强度较低。
在本公开中,术语“乙烯共聚物”是指乙烯与其他单体共聚所得聚合物的总称。
在本公开中,术语“可降解高分子”是指在一定的时间和一定的条件下,能被微生物或其分泌物在酶或化学分解作用下发生降解的高分子材料。
在本公开中,术语“防粘连剂”是指能防止塑料薄膜间粘连的一种物质。一般在配料时加入抗粘连剂,在常温下它与聚合物不相容而迁移到制品表面,从而使薄膜容易分离,但与滑爽剂不同,它不降低摩擦系数。
在本公开中,术语“爽滑剂”是指防止薄膜在生产、贮存及使用时发生粘连,不易分离或打开,从而使薄膜表面具有滑爽的特性的一种化合物。
在本公开中,术语“PLA”是指聚乳酸,是一种新型的生物基及可再生生物降解材料,属于聚酯家族。聚乳酸是以乳酸为主要原料聚合得到的聚合物,原料来源充分而且可以再生,主要以玉米、木薯等为原料。
在本公开中,术语“PCL”是指聚己内酯,是通过ε-己内酯单体在金属阴离子络合催化剂催化下开环聚合而成的高分子有机聚合物,通过控制聚合条件,可以获得不同的分子量。
在本公开中,术语“PVA”是指聚乙烯醇,白色片状、絮状或粉末状固体,无味,具有生物可降解特性。
具体实施方式
本公开涉及环保可降解消光膜,其包括:
上表层,所述表层由聚丙烯树脂、PVC树脂、乙烯共聚物、可降解高分子、防粘连剂及爽滑剂制得;
芯层,所述芯层由聚丙烯树脂及乙烯共聚物制得;以及
下表层,所述下表层由消光料、爽滑剂、聚丙烯树脂及乙烯共聚物制得。
在某些实施方案中,其中按质量份数计,上表层由40至60份聚丙烯树脂、20至30份PVC树脂、10至20份乙烯共聚物、2至5份可降解高分子、1至2份防粘连剂及1至2份爽滑剂制得。
在某些实施方案中,可降解高分子选自天然高分子、微生物合成高分子、化学合成高分子或其混合物。
在某些实施方案中,天然高分子选自淀粉、纤维素、甲壳质、蛋白质或其混合物。
在某些实施方案中,天然高分子选自淀粉。
在某些实施方案中,微生物合成高分子选自聚酯、多糖或其混合物。
在某些实施方案中,微生物合成高分子选自聚酯。
在某些实施方案中,化学合成高分子选自聚乳酸(PLA)、聚己内酯(PCL)、聚乙烯醇(PVA)或其混合物。
在某些实施方案中,化学合成高分子选自聚乳酸(PLA)。
在某些实施方案中,防粘连剂选自合成二氧化硅、脂肪酸金属盐、碳酸钙或其混合物。
在某些实施方案中,爽滑剂选自油酸酰胺、芥酸酰胺、硬脂酸钙、硅酮或其混合物。
在某些实施方案中,将聚丙烯树脂、PVC树脂、乙烯共聚物、可降解高分子、防粘连剂及爽滑剂加入主挤出机中,混合后熔融挤出制得所述上表层,所述熔融挤出温度为220至240℃。
在某些实施方案中,其中按质量份数计,所述芯层由40至60份聚丙烯树脂及40至60份乙烯共聚物制得。
在某些实施方案中,将聚丙烯树脂及乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得所述芯层,所述熔融挤出温度为220至240℃。
在某些实施方案中,其中按质量份数计,所述下表层由40至60份消光料、1至5份爽滑剂、20至30份聚丙烯树脂及20至30份乙烯共聚物制得。
在某些实施方案中,消光料选自二氧化硅、滑石粉、硬脂酸铝、硬脂酸钙、低分子热塑性树脂或其混合物。
在某些实施方案中,消光料选自二氧化硅、滑石粉、硬脂酸铝或其混合物。
在某些实施方案中,爽滑剂选自油酸酰胺、芥酸酰胺、硬脂酸钙、硅酮或其混合物。
在某些实施方案中,爽滑剂选自油酸酰胺、芥酸酰胺、硅酮或其混合物。
在某些实施方案中,将消光料、爽滑剂、聚丙烯树脂及乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得所述下表层,所述熔融挤出温度为220至240℃。
在某些实施方案中,将所述上表层、芯层及下表层共同进行双向拉伸形成三层结构的薄膜。
在某些实施方案中,表层厚度为0.5至1.0μm。
在某些实施方案中,芯层厚度为5至10μm。
在某些实施方案中,消光层厚度为1至2μm。
实施例1
本实施例公开了环保可降解消光膜,该消光膜从上至下依次由上表层、芯层和下表层组成,其制备方法包括:
将4g聚丙烯树脂、2gPVC树脂、1g乙烯共聚物、0.2g淀粉、0.1g二氧化硅及0.1g油酸酰胺加入主挤出机中,混合后熔融挤出制得上表层,其中熔融挤出温度为220℃;
将4g聚丙烯树脂及4g乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得芯层,其中熔融挤出温度为220℃;
将4g二氧化硅、0.1g油酸酰胺、2g聚丙烯树脂及2g乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得下表层,其中熔融挤出温度为220℃;
将上表层、芯层及下表层共同进行双向拉伸形成三层结构的薄膜,其中表层厚度为0.5至1.0μm,所述芯层厚度为5至10μm,所述消光层厚度为1至2μm。
实施例2
本实施例公开了环保可降解消光膜,该消光膜从上至下依次由上表层、芯层和下表层组成,其制备方法包括:
将5g聚丙烯树脂、2.5gPVC树脂、1.5g乙烯共聚物、0.35g聚酯、0.15g脂肪酸金属盐及0.15g芥酸酰胺加入主挤出机中,混合后熔融挤出制得上表层,其中熔融挤出温度为230℃;
将5g聚丙烯树脂及5g乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得芯层,其中熔融挤出温度为230℃;
将5g滑石粉、0.3g芥酸酰胺、2.5g聚丙烯树脂及2.5g乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得下表层,其中熔融挤出温度为230℃;
将上表层、芯层及下表层共同进行双向拉伸形成三层结构的薄膜,其中表层厚度为0.5至1.0μm,所述芯层厚度为5至10μm,所述消光层厚度为1至2μm。
实施例3
本实施例公开了环保可降解消光膜,该消光膜从上至下依次由上表层、芯层和下表层组成,其制备方法包括:
将6g聚丙烯树脂、3gPVC树脂、2g乙烯共聚物、0.5g PLA、0.1g碳酸钙、0.2g碳酸钙及0.2g硬脂酸钙加入主挤出机中,混合后熔融挤出制得上表层,其中熔融挤出温度为240℃;
将6g聚丙烯树脂及6g乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得芯层,其中熔融挤出温度为240℃;
将6g硬脂酸铝、0.5g硅酮、3g聚丙烯树脂及3g乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得下表层,其中熔融挤出温度为240℃;
将上表层、芯层及下表层共同进行双向拉伸形成三层结构的薄膜,其中表层厚度为0.5至1.0μm,所述芯层厚度为5至10μm,所述消光层厚度为1至2μm。
实施例4
为了进一步验证本发明制备的环保可降解消光膜的性能,对实施例1-3中制备的环保可降解消光膜对光泽度和降解性能进行了研究。
表1实施例1-3光泽度
实施例1 | 实施例2 | 实施例3 | 检测标准 | |
光泽度 | 8.0% | 7.5% | 7.8% | GB/T8807 |
表2不同温度下实施例1-3完全降解需要的时间
温度 | 实施例1 | 实施例2 | 实施例3 |
80℃ | 8h | 8h | 8h |
150℃ | 5h | 4.5h | 5h |
220℃ | 3h | 2h | 3h |
综上所述:本发明制备的环保可降解消光膜具有较低的光泽度,同时可降解高分子在产品生命周期破坏分子结构,让薄膜在自然环境中通过光、热、压力与微生物对其进行分解,能够在0-300℃内进行降解,解决了现有技术中消光膜无法降解或只能在较高的温度下才能够降解的问题;既保存了原消光膜的优点,又可降解,是一种绿色环保的薄膜。
从前述中可以理解,尽管为了示例性说明的目的描述了本公开的具体实施方案,但是在不偏离本公开的精神和范围的条件下,本领域所述技术人员可以作出各种变形或改进、这些变形或修改都应落入本公开所附权利要求的范围。
Claims (10)
1.环保可降解消光膜,其包括:
上表层,所述表层由聚丙烯树脂、PVC树脂、乙烯共聚物、可降解高分子、防粘连剂及爽滑剂制得;
芯层,所述芯层由聚丙烯树脂及乙烯共聚物制得;以及
下表层,所述下表层由消光料、爽滑剂、聚丙烯树脂及乙烯共聚物制得。
2.如权利要求1所述的环保可降解消光膜,其中按质量份数计,所述上表层由40至60份聚丙烯树脂、20至30份PVC树脂、10至20份乙烯共聚物、2至5份可降解高分子、1至2份防粘连剂及1至2份爽滑剂制得。
3.如权利要2所述的环保可降解消光膜,其中所述可降解高分子选自天然高分子、微生物合成高分子、化学合成高分子或其混合物,优选所述天然高分子选自淀粉、纤维素、甲壳质、蛋白质或其混合物,更优选为淀粉,优选所述微生物合成高分子选自聚酯、多糖或其混合物,更优选为聚酯,优选所述化学合成高分子选自聚乳酸(PLA)、聚己内酯(PCL)、聚乙烯醇(PVA)或其混合物,更优选为聚乳酸(PLA);所述防粘连剂选自合成二氧化硅、脂肪酸金属盐、碳酸钙或其混合物;所述爽滑剂选自油酸酰胺、芥酸酰胺、硬脂酸钙、硅酮或其混合物。
4.如权利要求3所述的环保可降解消光膜,其中:将聚丙烯树脂、PVC树脂、乙烯共聚物、可降解高分子、防粘连剂及爽滑剂加入主挤出机中,混合后熔融挤出制得所述上表层,所述熔融挤出温度为220至240℃。
5.如权利要求1所述的环保可降解消光膜,其中按质量份数计,所述芯层由40至60份聚丙烯树脂及40至60份乙烯共聚物制得。
6.如权利要求5所述的环保可降解消光膜,其中:将聚丙烯树脂及乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得所述芯层,所述熔融挤出温度为220至240℃。
7.如权利要求1所述的环保可降解消光膜,其中按质量份数计,所述下表层由40至60份消光料、1至5份爽滑剂、20至30份聚丙烯树脂及20至30份乙烯共聚物制得。
8.如权利要求7所述的环保可降解消光膜,其中所述消光料选自二氧化硅、滑石粉、硬脂酸铝、硬脂酸钙、低分子热塑性树脂或其混合物,更优选为二氧化硅、滑石粉、硬脂酸铝或其混合物;所述爽滑剂选自油酸酰胺、芥酸酰胺、硬脂酸钙、硅酮或其混合物,更优选为油酸酰胺、芥酸酰胺、硅酮或其混合物。
9.如权利要求8所述的环保可降解消光膜,其中:将消光料、爽滑剂、聚丙烯树脂及乙烯共聚物加入辅助挤出机中,混合后熔融挤出制得所述下表层,所述熔融挤出温度为220至240℃。
10.如权利要求1至9中任一权利要求所述的环保可降解消光膜,其中:将所述上表层、芯层及下表层共同进行双向拉伸形成三层结构的薄膜,所述表层厚度为0.5至1.0μm,所述芯层厚度为5至10μm,所述消光层厚度为1至2μm。
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