CN106750844A - 一种pe木塑复合膜 - Google Patents
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- 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
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2203/00—Applications
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
本发明涉及一种PE木塑复合膜,其特征在于该木塑复合膜采取如下重量份的原料组成:PE基体树脂,100份;木粉,5–40份;薄膜用PE填充母料,0–35份;润滑剂,1–4份;增塑剂,0–25份;EVA,3–30份;偶联剂,0–0.8份;着色剂,0.03–1份;抗氧剂,0–0.5份;紫外线吸收剂,0–1.5份;光稳定剂,0–1份。该膜可用吹膜法和压延法制备,力学性能优良,膜外观色泽均一。制备的复合膜可用于产品包装等领域。
Description
技术领域
本发明涉及一种PE木塑复合膜,属于聚合物基复合材料的技术领域。
背景技术
塑料薄膜因价格低廉,方便实用等原因而广泛用于包装和地膜等领域,但也给环境带来了巨大的压力。近年来绿色材料的概念逐渐深入人心,掺混型、天然高分子型、化学合成型以及微生物合成型等生物降解材料的开发和应用对可降解塑料薄膜行业的发展起到了很大的推动作用。但由于生物降解材料的特性使得其用于薄膜材料时还受到限制,如(1)掺混型生物降解材料存在浪费大量粮食、不能完全降解等问题;(2)天然高分子型生物降解材料存在熔融加工性能和力学性能差缺点,需进行改性;(3)化学合成型以及微生物合成型生物降解材料存在生产成本高、力学性能较差等缺点;(4)近年来采用的多层共挤生产多层膜技术存在工艺复杂、生产成本较高的问题。
木塑复合材料近年来因成本低、密度小、力学性能优良以及绿色环保等优点而广泛用于制备各种板材、型材等制品。但由于木塑材料自身的缺点,很难用以生产塑料薄膜,如(1)木粉的主要成分是纤维素、半纤维素和木质素,这些生物大分子均是刚性大分子,一般刚性大分子有增强作用,但在外力作用下,主链上的单键内旋转较困难,即韧性差,使得复合膜的断裂伸长率难以满足使用要求;(2)聚合物的亲油性和木粉的亲水性,使得复合膜中两相相容性差,从微观结构上说,作为连续相的树脂和分散相的木粉的结合力弱,分相明显,木粉在体系中团聚现象明显,这样即影响材料的宏观力学性能,又使得复合膜的表面不均匀。严重的是在吹膜成型时,会因熔体各组分含量不均匀,使得膜泡破裂;(3)木粉加入树脂后,会使得复合材料熔体的粘度大幅增加,难以满足吹塑成型时对熔体流动性的要求;(4)木粉本身的特性,使得复合膜的色泽很深,表面不光滑。
以PE为基体,力学性能优良,外观良好、可以吹塑成型和压延成型方式生产的PE木塑复合膜,目前文献上还未见报道。
发明内容
本发明的目的是提供一种PE木塑复合膜。该膜可用吹膜法和压延法制备,力学性能优良,膜外观色泽均一。制备的复合膜可用于产品包装等领域。
为实现上述目的,本发明采用如下技术方案;一种PE木塑复合膜,采用如下重量份的原料组成:
PE基体树脂,100份;木粉,5–40份;薄膜用PE填充母料,0–35份;润滑剂,1–4份;增塑剂,0–25份;EVA,3–30份;偶联剂,0–0.8份;着色剂,0.03–1份;抗氧剂,0–0.5份;紫外线吸收剂,0–1.5份;光稳定剂,0–1份。
更好的配比如下:
PE基体树脂,100份;木粉,5–25份;薄膜用PE填充母料,0–20份;润滑剂,1.5–3份;增塑剂,2–20份;EVA,5–20份;偶联剂,0–0.8份;着色剂,0.03–1份;抗氧剂,0–0.5份;紫外线吸收剂,0–1.5份;光稳定剂,0–1份。
本发明所选用的PE基体树脂为HDPE、LLDPE和LDPE的共混物,其中LLDPE为40–60份;HDPE,10–50份;LDPE,10–50份。木粉,目数大于300。薄膜用PE填充母料为碳酸钙、滑石粉、云母和二氧化硅等填料中的一种或几种。润滑剂为复合润滑体系。增塑剂为环氧大豆油、甘油、邻苯二甲酸二辛酯、邻苯二甲酸二丁酯中的一种或几种。
本发明还提供了一种PE木塑复合膜的制备方法,包括以下步骤:
(1)将木粉原料磨碎至300目以上,干燥备用;
(2)采用硅烷偶联剂或异氰酸酯偶联剂等对木粉进行预处理,偶联剂用量为木粉质量的0.5-2wt%;
(3)将木粉与增塑剂按比例在捏合机中处理后,与EVA在高速混合机中高速混合,混合时间的长短要看木粉活化效果;
(4)将LLDPE、LDPE、HDPE、填料母料以及各种助剂按比例与木粉在高速混合机中混合3-5min,最后加入适量的润滑剂混合2-3min。
(5)将上述混合物料经挤出混炼造粒,最好选用同向平行双螺杆挤出机,对挤出温度无特殊要求;
(6)采用挤出法和压延法中的一种生产PE木塑复合膜。
本发明的优点在于:
(1)本发明提供的复合膜,由于基体树脂为HDPE、LLDPE和LDPE的共混物,可以通过配方中不同PE品种的配方比例和牌号的选择,使得其添加木粉后仍可成型薄膜,并有良好的力学性能;
(2)本发明提供的复合膜,在配方设计时,基体树脂,木粉粒径大小,薄膜用PE填充母料种类等选择的不同以及配方体系中各组分含量的变化,可以赋予材料以不同的熔融加工流变性能和力学性能,以生产不同厚度的PE复合膜,可适应不同的用途;
(3)本发明提供的复合膜,外观色泽均匀,有明显的木质材料触感。
附图说明
图1:PE木塑复合膜吹塑成型的现场施工图。
具体实施方式
以下结合实施例对本发明作进一步详述。
实施实例1
吹塑级LLDPE(熔融指数,0.9g/10min),60份;
LDPE(熔融指数,7g/10min),20份;
HDPE(熔融指数,1.1g/10min),20份;
木粉(1250目),12.5份;
云母(以母料形式加入),12.5份;
润滑体系(硬脂酸钙∶硬脂酸∶PE蜡=1∶1∶0.5),2份;
增塑剂,邻苯二甲酸二辛酯,6份;
EVA(VAC含量为40%),10份;
硅烷偶联剂,0.15份;
着色剂,0.03–1份;
抗氧剂,0–0.5份;
紫外线吸收剂,0–1.5份;
光稳定剂,0–1份。
先用硅烷偶联剂对木粉进行处理,,然后将各种原料按上述配方中比例通过捏合机和混炼机混合均匀,熔融挤出造粒,干燥后采用挤出吹塑成型即可,对加工温度无特殊要求。
实施实例2
吹塑级LLDPE(熔融指数,0.9g/10min),60份;
LDPE(熔融指数,1.9g/10min),20份;
HDPE(熔融指数,0.9g/10min),20份;
木粉(300目),15份;
滑石粉(以母料形式加入),15份;
润滑体系(硬脂酸钙∶硬脂酸∶PE蜡=1∶1∶0.5),2份;
增塑剂,邻苯二甲酸二辛酯,5份;
EVA(VAC含量为40%),15份;
异氰酸酯偶联剂,0.15份;
着色剂,0.03–1份;
抗氧剂,0–0.5份;
紫外线吸收剂,0–1.5份;
光稳定剂,0–1份。
先用硅烷偶联剂对木粉进行处理,,然后将各种原料按上述配方中比例通过捏合机和混炼机混合均匀,熔融挤出造粒,干燥后采用压延成型即可,对加工温度无特殊要求。
实施实例3
吹塑级LLDPE(熔融指数,0.9g/10min),60份;
LDPE(熔融指数,7g/10min),20份;
HDPE(熔融指数,1.1g/10min),20份;
木粉(800目),7.5份;
碳酸钙(以母料形式加入),7.5份;
润滑体系(硬脂酸钙∶硬脂酸∶PE蜡=1∶1∶0.5),2份;
增塑剂,邻苯二甲酸二辛酯,2.5份;
EVA(VAC含量为28%),15份;
着色剂,0.03–1份;
抗氧剂,0–0.5份;
紫外线吸收剂,0–1.5份;
光稳定剂,0–1份。
将各种原料按上述配方中比例通过捏合机和混炼机混合均匀,熔融挤出造粒,干燥后采用挤出吹塑成型即可,对加工温度无特殊要求。
实施实例4
吹塑级LLDPE(熔融指数,0.9g/10min),40份;
LLDPE(熔融指数,20g/10min),20份;
LDPE(熔融指数,7g/10min),20份;
HDPE(熔融指数,0.9g/10min),20份;
木粉(800目),7.5份;
碳酸钙(以母料形式加入),7.5份;
润滑剂,TPW604PE木塑专用复合润滑剂,2份;
增塑剂,邻苯二甲酸二辛酯,2.5份;
EVA(VAC含量为28%),15份;
着色剂,0.03–1份;
抗氧剂,0–0.5份;
紫外线吸收剂,0–1.5份;
光稳定剂,0–1份。
将各种原料按上述配方中比例通过捏合机和混炼机混合均匀,熔融挤出造粒,干燥后采用挤出吹塑成型即可,对加工温度无特殊要求。
本发明一种PE木塑复合膜,所得薄膜的拉伸强度大于10MPa;断裂伸长率大于250%。
应说明的是:显然,上述实施例仅仅是为清楚地说明本发明所作的举例,而并非对实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举,而由此所引申出的显而易见的变化或变动仍处于本发明的保护范围之中。
Claims (2)
1.一种PE木塑复合膜,其特征在于该木塑复合膜采取如下重量份的原料组成:PE基体树脂,100份;木粉,5–40份;薄膜用PE填充母料,0–35份;润滑剂,1–4份;增塑剂,0–25份;EVA,3–30份;偶联剂,0–0.8份;着色剂,0.03–1份;抗氧剂,0–0.5份;紫外线吸收剂,0–1.5份;光稳定剂,0–1份。
2.根据权利要求1所述的一种PE木塑复合膜,其特征在于所述的PE基体树脂为HDPE、LLDPE和LDPE的共混物。
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CN107501690A (zh) * | 2017-09-20 | 2017-12-22 | 界首市希捷仿真花卉有限公司 | 一种能够提高仿真花卉着色性能的复合材料 |
CN114685879A (zh) * | 2020-12-31 | 2022-07-01 | 上海昶法新材料有限公司 | 一种双层塑料、原料组合物及其制备方法和应用 |
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CN102964861A (zh) * | 2012-11-13 | 2013-03-13 | 沈阳化工大学 | 一种无卤阻燃木塑复合材料及其制备方法 |
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CN102964861A (zh) * | 2012-11-13 | 2013-03-13 | 沈阳化工大学 | 一种无卤阻燃木塑复合材料及其制备方法 |
Cited By (4)
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CN107501690A (zh) * | 2017-09-20 | 2017-12-22 | 界首市希捷仿真花卉有限公司 | 一种能够提高仿真花卉着色性能的复合材料 |
CN107501690B (zh) * | 2017-09-20 | 2018-10-02 | 界首市希捷仿真花卉有限公司 | 一种能够提高仿真花卉着色性能的复合材料 |
CN114685879A (zh) * | 2020-12-31 | 2022-07-01 | 上海昶法新材料有限公司 | 一种双层塑料、原料组合物及其制备方法和应用 |
CN114685879B (zh) * | 2020-12-31 | 2024-02-09 | 上海昶法新材料有限公司 | 一种双层塑料、原料组合物及其制备方法和应用 |
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