CN114536921A - 一种抗氧化的食品包装膜的制备方法 - Google Patents

一种抗氧化的食品包装膜的制备方法 Download PDF

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CN114536921A
CN114536921A CN202210238098.9A CN202210238098A CN114536921A CN 114536921 A CN114536921 A CN 114536921A CN 202210238098 A CN202210238098 A CN 202210238098A CN 114536921 A CN114536921 A CN 114536921A
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张永泽
侯汉学
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Shandong Agricultural University
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Abstract

本发明公开一种抗氧化的食品包装膜的制备方法,所述制备方法包括制备外膜料粒、制备内膜料粒、制备包装膜。本发明制备的包装膜阻隔性好,透过量低,氧气透过量为0.03‑0.04cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.05‑0.06cm3/(m2·24h·0.1Mpa),本发明制备的包装膜水汽透过率低,水汽透过率为0.35‑0.38g/(m2·24h)。

Description

一种抗氧化的食品包装膜的制备方法
技术领域
本发明涉及一种抗氧化的食品包装膜的制备方法,属于食品包装技术领域。
背景技术
食品包装膜对食品起到保护的作用,目前,国内用量最大的食品和药品复合包装膜,均采用普通的聚丙烯膜或聚乙烯膜复合而成,复合包装膜由于价格便宜,制作方便,深受包装行业的欢迎。但是复合包装膜的力学强度较差,往往容易出现撕裂、拉伸变形和被刺穿的情况,进而限制了复合包装膜的进一步使用。同时
作为食品包装膜,需要保护食品的新鲜感,对氧气透过量、水汽透过量有一定要求,使食物得以长时间保存不发生变质。
CN106368076A公开了一种高阻隔复合食品包装膜及其制备方法,断裂伸长率为145%,但是拉伸强度较低,最高仅为8Mpa,有一定的耐穿刺强度,但是其氧气透过量、水汽透过量高,无法实现抗氧化的效果。
CN107336495A公开了一种一种具有保鲜及气密性功能的食品包装膜及其制备方法,提供的食品包装膜同时具有良好保鲜及气密性功能,但是其并未公开其氧气透过量、水汽透过量的指标,也未公开其强度方面的指标。CN112795248A公开了一种高阻隔PVA涂布液及其应用,制备的涂布液可以涂布在PE包装膜的表面可有效降低包装袋的水汽透过率,能够有效阻止外界环境中的氧气进入PE包装袋内,但是涂布后也无法提高膜的强度指标,并且长时间使用会产生脱落现象。
综上所述,现有技术存在以下缺点:
(1)现有食品包装膜综合拉伸性能差;
(2)现有食品包装膜氧气透过率高,水汽透过率高。
发明内容
本发明所要解决的技术问题是克服现有技术存在的缺陷,通过分别制备外膜、内膜粒料并制膜得到一种抗氧化的食品包装膜,实现以下发明目的:
(1)食品包装膜综合拉伸性能好;
(2)食品包装膜氧气透过率低,水汽透过率低。
为解决上述技术问题,本发明采取以下技术方案:
一种抗氧化的食品包装膜的制备方法,所述制备方法包括制备外膜料粒、制备内膜料粒、制备包装膜。
以下是对上述技术方案的进一步改进;
所述制备外膜料粒,将瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液混合,在80-90℃搅拌80-100min,加入2,5-二甲基-2,5 二叔丁基过氧化己烷、二氧化硅在75-85℃下搅拌50-70min,加入1,2-丙二醇、三乙醇胺、过氧化叔戊酸叔丁基酯在75-85℃下搅拌100-130min,然后与BOPP颗粒熔融共混,得到外膜料粒。
所述瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液的质量比为80-120:0.8-1.2:6-9:8-12;
所述2,5-二甲基-2,5 二叔丁基过氧化己烷与瓜尔胶的质量比为1:140-160;
所述二氧化硅与瓜尔胶的质量比为1:6-8;
所述1,2-丙二醇与瓜尔胶的质量比为1:4.5-5.5;
所述三乙醇胺与瓜尔胶的质量比为1:9-11;
所述过氧化叔戊酸叔丁基酯与瓜尔胶的质量比为1:45-55;
所述BOPP颗粒与瓜尔胶的质量比为6.5-7.5:1。
所述制备内膜料粒包括制备氧化铝复合纳米分子筛、造粒;
所述制备氧化铝复合纳米分子筛,将氧化铝分散于无水乙醇中,投入纳米分子筛,在100-150W功率下超声50-80min,过滤后在105-125℃下真空干燥,送入研磨机研磨至粒径为2.5-3.5μm,加入高密度聚乙烯、3-氨丙基三甲氧基硅烷熔融共混得到氧化铝复合纳米分子筛。
所述氧化铝与无水乙醇的质量比为1:9-11;
所述纳米分子筛与氧化铝的质量比为2.5-3.5:1;
所述高密度聚乙烯与纳米分子筛的质量比为2:2.5-3.5;
所述3-氨丙基三甲氧基硅烷与纳米分子筛的质量比为1:110-130;
所述造粒,将氧化铝复合纳米分子筛、碳纤维、PETG颗粒、PET颗粒、油酸酰胺熔融共混挤出造粒得到内膜料粒。
所述内膜料粒按质量份计,包括以下组分:氧化铝复合纳米分子筛4-6份、碳纤维1.8-2.2份、PETG颗粒25-35份、PET颗粒13-17份、油酸酰胺0.8-1.2份。
所述制备包装膜,将外膜料粒、内膜料粒分别加热至熔融状态,高压条件下经氧化铝泡沫陶瓷挤压过滤,经挤出机挤出,拉伸分别得到外膜、内膜,将外膜、内膜中间涂布上胶,热压得到包装膜。
所述氧化铝泡沫陶瓷,厚度4.5-5.5mm,过滤精度9-11ppi,孔隙率80-87%;
所述挤压过滤,压力为0.7-0.9Mpa;
所述上胶,上胶量为2.3-2.7g/m2(胶水干基)。
所述包装膜外膜厚度0.015-0.025mm,内膜厚度0.005-0.015mm。
与现有技术相比,本发明取得以下有益效果:
本发明制备的包装膜拉伸强度高,横向拉伸强度为35.9-26.2MPa,纵向拉伸强度为34.5-34.8MPa,断裂伸长率高,横向断裂伸长率为136-137%,纵向断裂伸长率为122-125%;
本发明制备的包装膜耐穿刺效果好,穿刺强度为109-113N;
本发明制备的包装膜阻隔性好,透过量低,氧气透过量为0.03-0.04cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.05-0.06cm3/(m2·24h·0.1Mpa),测试方法为(GB/T10004-2008);
本发明制备的包装膜水汽透过率低,水汽透过率为0.35-0.38g/(m2·24h),测试方法为(GB/T 10004-2008);
本发明制备的包装膜抗撕裂能力高,横向直角撕裂力为31-32N,纵向直角撕裂力为28-30N(GB/T 10004-2008)。
具体实施方式
实施例1
(1)制备外膜料粒
将瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液混合放入反应釜,在85℃反应90min,加入2,5-二甲基-2,5 二叔丁基过氧化己烷、二氧化硅在80℃下保持60min,加入1,2-丙二醇、三乙醇胺、过氧化叔戊酸叔丁基酯在80℃下保持120min,然后与BOPP颗粒熔融共混,得到外膜料粒;
所述瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液的质量比为100:1:7:10;
所述2,5-二甲基-2,5 二叔丁基过氧化己烷与瓜尔胶的质量比为1:150;
所述二氧化硅与瓜尔胶的质量比为1:7;
所述1,2-丙二醇与瓜尔胶的质量比为1:5;
所述三乙醇胺与瓜尔胶的质量比为1:10;
所述过氧化叔戊酸叔丁基酯与瓜尔胶的质量比为1:50;
所述BOPP颗粒与瓜尔胶的质量比为7:1。
(2)制备内膜料粒
a、制备氧化铝复合纳米分子筛
将氧化铝分散于无水乙醇中,投入纳米分子筛,在120W功率下超声60min,过滤后在120℃下真空干燥,送入研磨机研磨至粒径为3μm,加入高密度聚乙烯、3-氨丙基三甲氧基硅烷熔融共混得到氧化铝复合纳米分子筛;
所述氧化铝与无水乙醇的质量比为1:10;
所述纳米分子筛与氧化铝的质量比为3:1;
所述高密度聚乙烯与纳米分子筛的质量比为2:3;
所述3-氨丙基三甲氧基硅烷与纳米分子筛的质量比为1:120;
b、造粒
所述内膜料粒按质量份计,包括以下组分:氧化铝复合纳米分子筛5份、碳纤维2份、PETG颗粒30份、PET颗粒15份、油酸酰胺1份;
将氧化铝复合纳米分子筛、碳纤维、PETG颗粒、PET颗粒、油酸酰胺熔融共混挤出造粒得到内膜料粒。
(3)制备包装膜
将外膜料粒、内膜料粒分别加热至熔融状态,高压条件下经氧化铝泡沫陶瓷挤压过滤,经挤出机挤出,拉伸分别得到外膜、内膜,将外膜、内膜中间涂布上胶,热压得到包装膜;
所述氧化铝泡沫陶瓷,厚度5mm,过滤精度10ppi,孔隙率85%;
所述挤压过滤,压力为0.8Mpa;
所述上胶,上胶量为2.5g/m2(胶水干基);
所述外膜厚度0.02mm;
所述内膜厚度0.01mm。
实施例1制备的包装膜拉伸强度高,横向拉伸强度为36.2MPa,纵向拉伸强度为34.8MPa,断裂伸长率高,横向断裂伸长率为137%,纵向断裂伸长率为125%;
实施例1制备的包装膜耐穿刺效果好,穿刺强度为113N;
实施例1制备的包装膜阻隔性好,透过量低,氧气透过量为0.03cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.05cm3/(m2·24h·0.1Mpa),测试方法为(GB/T 10004-2008);
实施例1制备的包装膜水汽透过率低,水汽透过率为0.35g/(m2·24h),测试方法为(GB/T 10004-2008);
实施例1制备的包装膜抗撕裂能力高,横向直角撕裂力为32N,纵向直角撕裂力为30N(GB/T 10004-2008)。
实施例2
(1)制备外膜料粒
将瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液混合放入反应釜,在80℃反应100min,加入2,5-二甲基-2,5 二叔丁基过氧化己烷、二氧化硅在75℃下保持70min,加入1,2-丙二醇、三乙醇胺、过氧化叔戊酸叔丁基酯在75℃下保持130min,然后与BOPP颗粒熔融共混,得到外膜料粒;
所述瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液的质量比为80:0.8:6:8;
所述2,5-二甲基-2,5 二叔丁基过氧化己烷与瓜尔胶的质量比为1:140;
所述二氧化硅与瓜尔胶的质量比为1:6;
所述1,2-丙二醇与瓜尔胶的质量比为1:4.5;
所述三乙醇胺与瓜尔胶的质量比为1:9;
所述过氧化叔戊酸叔丁基酯与瓜尔胶的质量比为1:45;
所述BOPP颗粒与瓜尔胶的质量比为6.5:1。
(2)制备内膜料粒
a、制备氧化铝复合纳米分子筛
将氧化铝分散于无水乙醇中,投入纳米分子筛,在100W功率下超声80min,过滤后在105℃下真空干燥,送入研磨机研磨至粒径为2.5μm,加入高密度聚乙烯、3-氨丙基三甲氧基硅烷熔融共混得到氧化铝复合纳米分子筛;
所述氧化铝与无水乙醇的质量比为1:9;
所述纳米分子筛与氧化铝的质量比为2.5:1;
所述高密度聚乙烯与纳米分子筛的质量比为2:2.5;
所述3-氨丙基三甲氧基硅烷与纳米分子筛的质量比为1:110;
b、造粒
所述内膜料粒按质量份计,包括以下组分:氧化铝复合纳米分子筛4份、碳纤维1.8份、PETG颗粒25份、PET颗粒13份、油酸酰胺0.8份;
将氧化铝复合纳米分子筛、碳纤维、PETG颗粒、PET颗粒、油酸酰胺熔融共混挤出造粒得到内膜料粒。
(3)制备包装膜
将外膜料粒、内膜料粒分别加热至熔融状态,高压条件下经氧化铝泡沫陶瓷挤压过滤,经挤出机挤出,拉伸分别得到外膜、内膜,将外膜、内膜中间涂布上胶,热压得到包装膜;
所述氧化铝泡沫陶瓷,厚度4.5mm,过滤精度9ppi,孔隙率80%;
所述挤压过滤,压力为0.7Mpa;
所述上胶,上胶量为2.3g/m2(胶水干基);
所述外膜厚度0.015mm;
所述内膜厚度0.015mm。
实施例2制备的包装膜拉伸强度高,横向拉伸强度为36.1MPa,纵向拉伸强度为34.5MPa,断裂伸长率高,横向断裂伸长率为136%,纵向断裂伸长率为123%;
实施例2制备的包装膜耐穿刺效果好,穿刺强度为109N;
实施例2制备的包装膜阻隔性好,透过量低,氧气透过量为0.04cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.05cm3/(m2·24h·0.1Mpa),测试方法为(GB/T 10004-2008);
实施例2制备的包装膜水汽透过率低,水汽透过率为0.36g/(m2·24h),测试方法为(GB/T 10004-2008);
实施例2制备的包装膜抗撕裂能力高,横向直角撕裂力为31N,纵向直角撕裂力为29N(GB/T 10004-2008)。
实施例3
(1)制备外膜料粒
将瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液混合放入反应釜,在90℃反应80min,加入2,5-二甲基-2,5 二叔丁基过氧化己烷、二氧化硅在85℃下保持50min,加入1,2-丙二醇、三乙醇胺、过氧化叔戊酸叔丁基酯在85℃下保持100min,然后与BOPP颗粒熔融共混,得到外膜料粒;
所述瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液的质量比为120:1.2:9:12;
所述2,5-二甲基-2,5 二叔丁基过氧化己烷与瓜尔胶的质量比为1:160;
所述二氧化硅与瓜尔胶的质量比为1:8;
所述1,2-丙二醇与瓜尔胶的质量比为1:5.5;
所述三乙醇胺与瓜尔胶的质量比为1:11;
所述过氧化叔戊酸叔丁基酯与瓜尔胶的质量比为1:55;
所述BOPP颗粒与瓜尔胶的质量比为7.5:1。
(2)制备内膜料粒
a、制备氧化铝复合纳米分子筛
将氧化铝分散于无水乙醇中,投入纳米分子筛,在150W功率下超声50min,过滤后在125℃下真空干燥,送入研磨机研磨至粒径为3.5μm,加入高密度聚乙烯、3-氨丙基三甲氧基硅烷熔融共混得到氧化铝复合纳米分子筛;
所述氧化铝与无水乙醇的质量比为1:11;
所述纳米分子筛与氧化铝的质量比为3.5:1;
所述高密度聚乙烯与纳米分子筛的质量比为2:3.5;
所述3-氨丙基三甲氧基硅烷与纳米分子筛的质量比为1:130;
b、造粒
所述内膜料粒按质量份计,包括以下组分:氧化铝复合纳米分子筛6份、碳纤维2.2份、PETG颗粒35份、PET颗粒17份、油酸酰胺1.2份;
将氧化铝复合纳米分子筛、碳纤维、PETG颗粒、PET颗粒、油酸酰胺熔融共混挤出造粒得到内膜料粒。
(3)制备包装膜
将外膜料粒、内膜料粒分别加热至熔融状态,高压条件下经氧化铝泡沫陶瓷挤压过滤,经挤出机挤出,拉伸分别得到外膜、内膜,将外膜、内膜中间涂布上胶,热压得到包装膜;
所述氧化铝泡沫陶瓷,厚度5.5mm,过滤精度11ppi,孔隙率87%;
所述挤压过滤,压力为0.9Mpa;
所述上胶,上胶量为2.7g/m2(胶水干基);
所述外膜厚度0.025mm;
所述内膜厚度0.005mm。
实施例3制备的包装膜拉伸强度高,横向拉伸强度为35.9MPa,纵向拉伸强度为34.6MPa,断裂伸长率高,横向断裂伸长率为137%,纵向断裂伸长率为122%;
实施例3制备的包装膜耐穿刺效果好,穿刺强度为110N;
实施例3制备的包装膜阻隔性好,透过量低,氧气透过量为0.04cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.06cm3/(m2·24h·0.1Mpa),测试方法为(GB/T 10004-2008);
实施例3制备的包装膜水汽透过率低,水汽透过率为0.38g/(m2·24h),测试方法为(GB/T 10004-2008);
实施例3制备的包装膜抗撕裂能力高,横向直角撕裂力为31N,纵向直角撕裂力为28N(GB/T 10004-2008)。
对比例1
在实施例1的基础上,省去制备外膜料粒步骤,直接使用BOPP颗粒作为外膜粒料制备外膜,其余步骤相同,制备包装膜;
对比例1制备的包装横向拉伸强度为32.5MPa,纵向拉伸强度为29.3MPa,横向断裂伸长率为117%,纵向断裂伸长率为95%;
对比例1制备的包装膜穿刺强度为92N;
对比例1制备的包装膜氧气透过量为0.11cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.12cm3/(m2·24h·0.1Mpa),测试方法为(GB/T 10004-2008);
对比例1制备的包装膜水汽透过率为0.48g/(m2·24h),测试方法为(GB/T 10004-2008);
对比例1制备的包装膜横向直角撕裂力为29N,纵向直角撕裂力为25N(GB/T10004-2008)。
对比例2
在实施例1的基础上,省去制备内膜料粒中制备氧化铝复合纳米分子筛步骤,造粒步骤中内膜料粒按质量份计,包括以下组分:纳米分子筛5份、碳纤维2份、PETG颗粒30份、PET颗粒15份、油酸酰胺1份,其余步骤相同,制备包装膜;
对比例2制备的包装横向拉伸强度为34.1MPa,纵向拉伸强度为32.4MPa,横向断裂伸长率为121%,纵向断裂伸长率为117%;
对比例2制备的包装膜穿刺强度为109N;
对比例2制备的包装膜氧气透过量为0.05cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.09cm3/(m2·24h·0.1Mpa),测试方法为(GB/T 10004-2008);
对比例2制备的包装膜水汽透过率为0.45g/(m2·24h),测试方法为(GB/T 10004-2008);
对比例2制备的包装膜横向直角撕裂力为30N,纵向直角撕裂力为27N(GB/T10004-2008)。
对比例3
在实施例1的基础上,制备包装膜步骤中,省去泡沫陶瓷过滤步骤,将外膜料粒、内膜料粒分别加热至熔融状态后直接挤出成膜,其余步骤相同,制备包装膜;
对比例3制备的包装横向拉伸强度为32.1MPa,纵向拉伸强度为31.6MPa,横向断裂伸长率为129%,纵向断裂伸长率为113%;
对比例3制备的包装膜穿刺强度为105N;
对比例3制备的包装膜氧气透过量为0.06cm3/(m2·24h·0.1Mpa),二氧化碳透过量为0.08cm3/(m2·24h·0.1Mpa),测试方法为(GB/T 10004-2008);
对比例3制备的包装膜水汽透过率为0.42g/(m2·24h),测试方法为(GB/T 10004-2008);
对比例3制备的包装膜横向直角撕裂力为28N,纵向直角撕裂力为26N(GB/T10004-2008)。

Claims (10)

1.一种抗氧化的食品包装膜的制备方法,其特征在于,所述制备方法包括制备外膜料粒、制备内膜料粒、制备包装膜。
2.根据权利要求1所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述制备外膜料粒,将瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液混合,在80-90℃搅拌80-100min,加入2,5-二甲基-2,5 二叔丁基过氧化己烷、二氧化硅在75-85℃下搅拌50-70min,加入1,2-丙二醇、三乙醇胺、过氧化叔戊酸叔丁基酯在75-85℃下搅拌100-130min,然后与BOPP颗粒熔融共混,得到外膜料粒。
3.根据权利要求2所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述瓜尔胶、双环戊二烯基二氯化锆、环氧树脂、丙烯酸乳液的质量比为80-120:0.8-1.2:6-9:8-12;
所述2,5-二甲基-2,5 二叔丁基过氧化己烷与瓜尔胶的质量比为1:140-160;
所述二氧化硅与瓜尔胶的质量比为1:6-8;
所述1,2-丙二醇与瓜尔胶的质量比为1:4.5-5.5;
所述三乙醇胺与瓜尔胶的质量比为1:9-11;
所述过氧化叔戊酸叔丁基酯与瓜尔胶的质量比为1:45-55;
所述BOPP颗粒与瓜尔胶的质量比为6.5-7.5:1。
4.根据权利要求1所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述制备内膜料粒包括制备氧化铝复合纳米分子筛、造粒;
所述制备氧化铝复合纳米分子筛,将氧化铝分散于无水乙醇中,投入纳米分子筛,在100-150W功率下超声50-80min,过滤后真空干燥,研磨至粒径为2.5-3.5μm,加入高密度聚乙烯、3-氨丙基三甲氧基硅烷熔融共混得到氧化铝复合纳米分子筛。
5.根据权利要求4所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述氧化铝与无水乙醇的质量比为1:9-11;
所述纳米分子筛与氧化铝的质量比为2.5-3.5:1;
所述高密度聚乙烯与纳米分子筛的质量比为2:2.5-3.5;
所述3-氨丙基三甲氧基硅烷与纳米分子筛的质量比为1:110-130。
6.根据权利要求4所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述造粒,将氧化铝复合纳米分子筛、碳纤维、PETG颗粒、PET颗粒、油酸酰胺熔融共混挤出造粒得到内膜料粒。
7.根据权利要求6所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述内膜料粒按质量份计,包括以下组分:氧化铝复合纳米分子筛4-6份、碳纤维1.8-2.2份、PETG颗粒25-35份、PET颗粒13-17份、油酸酰胺0.8-1.2份。
8.根据权利要求1所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述制备包装膜,将外膜料粒、内膜料粒分别加热至熔融状态,经氧化铝泡沫陶瓷挤压过滤,后经挤出机挤出,拉伸分别得到外膜、内膜,将外膜、内膜中间涂布上胶,热压得到包装膜。
9.根据权利要求8所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述氧化铝泡沫陶瓷,厚度4.5-5.5mm,过滤精度9-11ppi,孔隙率80-87%;
所述挤压过滤,压力为0.7-0.9Mpa;
所述上胶,上胶量为2.3-2.7g/m2
10.根据权利要求8所述的一种抗氧化的食品包装膜的制备方法,其特征在于:
所述包装膜外膜厚度0.015-0.025mm,内膜厚度0.005-0.015mm。
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