CN113185730A - 一种食品保鲜盒及其制备方法 - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract
本申请涉及包装盒技术领域,具体公开了一种食品保鲜盒及其制备方法。其技术要点是:一种食品保鲜盒,包括如下重量份数的组分:聚丙烯90‑95份;色母粒3‑5份;聚苯醚3‑7份;高阻隔膜5‑8份;天然抗菌剂3‑5份;所述天然抗菌剂为止痢草提取物和葡萄柚提取物组成的混合物,所述止痢草提取物与葡萄柚提取物的重量比为1:(2‑5);食品保鲜盒的制备步骤包括:S1、混料挤出;S2、抗菌膜材制备;S3、压合并吸塑成型。本申请制备的食品保鲜盒环保、安全、绿色无污染,且制作成本低,原料来源广泛,具有较高的经济效益。
Description
技术领域
本申请涉及包装盒技术领域,更具体地说,它涉及一种食品保鲜盒及其制备方法。
背景技术
目前随着网络购物的日益发展,越来越多的人选择网购生鲜类产品,然而在运输途中可能会由于气候环境的变化,导致产品变质,特别是一些新鲜果蔬,需要投入大量的资源来对其进行抗菌保鲜存放和运输,无形中增加了成本,降低了利润,更重要的是浪费了很多额外的资源。
随着科学技术的发展和人们生活水平的提高,人们的健康意识不断增强,对日常用品尤其是食品的健康化和环境的清洁化给予了更高的重视。然而在日常生活环境中,细菌、霉菌等致病性微生物无处不在,威胁着人类的健康。抗菌保鲜盒的研制与应用,可有效地降低或避免细菌的交叉传染和疾病的传播。
对此,人们进行了广泛的研究,目前使用较为普遍的是,在制作保鲜盒的材料中添加化学抗菌剂,同保鲜盒共同成型,由于此类抗菌剂毒性大,在熔融挤出加工过程中都会产生一些有毒的、刺激性的气体,而添加到塑料包装制品中也容易迁移析出,甚至会跑道包装的食品、果蔬、医用药物等中,造成使用不安全问题。
发明内容
为了保证保鲜盒具有良好抗菌功能的同时,提高其环保、安全性能,本申请提供一种食品保鲜盒及其制备方法。
第一方面,本申请提供一种食品保鲜盒,采用如下的技术方案:
一种食品保鲜盒,包括如下重量份数的组分:聚丙烯90-95份、色母粒3-5份、聚苯醚3-7份、高阻隔膜5-8份、天然抗菌剂3-5份;
所述天然抗菌剂为止痢草提取物和葡萄柚提取物组成的混合物,所述止痢草提取物与葡萄柚提取物的重量比为1:(2-5)。
通过采用上述技术方案,止痢草提取物具有良好的抗菌性能,其主要抗菌成分包括香芹酚和百里香酚两种,香芹酚和百里香酚的一个很重要特点是其疏水性,它可让细胞膜和线粒体上的磷脂结构分开,破坏细胞结构,增强细胞膜通透性,从而导致细胞内生命物质外泄,从而损害细菌酶系统,导致微生物死亡。葡萄柚提取物中含有的柚皮苷具有抗炎镇痛、抗病毒、抑菌及抑制眼醛糖还原酶的作用,葡萄柚提取物不仅对金黄色葡萄球菌、大肠杆菌和伤寒杆菌有较高的抑菌活性,而且是强效广谱的抗真菌药物。两种植物提取物复配使用具有一定的协同增效作用,抗菌抑菌效果更好,且两种抗菌植物提取物均为天然的抗菌剂,制成的保鲜盒更加环保、安全、绿色无污染。
进一步优选为,所述止痢草提取物与葡萄柚提取物的重量比为1:3。
通过采用上述技术方案,将止痢草提取物与葡萄柚提取物的重量比控制为1:3,其为最优比例,得到的保鲜盒抗菌、抑菌性能更加优良。
进一步优选为,所述高阻隔膜的结构为PP/TIE粘接层树脂/EVOH/TIE粘接层树脂/PE。
通过采用上述技术方案,选用结构为PP/TIE粘接层树脂/EVOH/TIE粘接层树脂/PE的高阻隔膜,使其与挤出的聚丙烯及其他各组分原料之间具有良好的粘接性,同时此结构的高阻隔膜使保鲜盒整体具有良好的结构强度,并能减小低温对聚丙烯的侵蚀,使保鲜盒在低温环境下仍具有良好的抗冲击性和韧性,结构强度高。
第二方面,本申请提供一种食品保鲜盒的制备方法,采用如下的技术方案:
一种食品保鲜盒的制备方法,包括以下步骤:
S1、混料挤出:将聚丙烯、色母粒、聚苯醚混合均匀,投入双螺杆挤出机中,挤出成型,双螺杆挤出机温度由进料口到出料口温度依次控制为195℃、200-210℃、212-218℃、220-230℃、235℃,得到膜材;
S2、抗菌膜材制备:将天然抗菌剂溶解于2倍重量的水中,加入0.2倍重量的十二烷基磺酸钠,搅拌均匀,得到抗菌液,将抗菌液涂覆于膜材表面,烘干;
S3、压合并吸塑成型:将表面涂覆有抗菌液的膜材和高阻隔膜经压辊进行压合,形成片材,将片材经过热熔软化后,置于模具的正上方,通过吸塑成型设备,吸塑成型得到食品保鲜盒。
通过采用上述技术方案,将聚丙烯和其他各组分原料混合均匀后,经双螺杆挤出机挤出成型,得到膜材,紧接着在其表面涂覆抗菌液,再压合高阻隔膜,得到片材,最后热熔软化后吸塑成型,操作简单,生产高效。通过将抗菌液涂覆于聚丙烯膜材与高阻隔膜之间,能够防止保鲜盒在使用过程中较快失去抗菌性,提高保鲜盒的抗菌使用寿命。
进一步优选为,步骤S3中,膜材和高阻隔膜经压辊进行压合时,两压辊间的距离为0.65-1.3mm。
通过采用上述技术方案,根据要求,可将两压辊间距控制为0.65-1.3mm。从而得到不同厚度规格要求的保鲜盒。
进一步优选为,步骤S3中,所述压辊的温度控制为25-30℃。
通过采用上述技术方案,能够严格控制片材的厚度,并使膜材和高祖隔膜之间具有较高的结合强度,且压辊的温度控制为25-30℃,有利于使膜材和高阻隔膜在压合过程中不易产生较大的形变,进而能够得到稳定性良好的片材,并使片材在后期吹塑过程中具有良好的应用性。
进一步优选为,步骤S3中,所述高阻隔膜在膜材上的压合厚度为30-50μm。
通过采用上述技术方案,将高阻隔膜的压合厚度控制为30-50μm,使得片材整体具有良好的吸塑成型效果,且高阻隔膜与膜材具有良好结合性,高阻隔膜能够防止低温对聚丙烯膜材的侵蚀。
进一步优选为,步骤S3中,所述模具在使用前还经过预热处理,预热温度为40-50℃。
通过采用上述技术方案,对模具进行预热处理,有利于使热熔软化后的片材在于模具接触时能够完全贴合,且在吸塑成型时,能够使片层的成型更加均匀平整,进而使得到的保鲜盒具有良好的质量。
进一步优选为,步骤S3中,所述片材吸塑成型后,在成型片材的周侧用冷风进行降温处理。
通过采用上述技术方案,用冷风对模具上贴附的片材进行降温,有利于加快片材冷却成型的速率,进而能够提高整个制备工艺的生产效率。同时,冷风对片材的表面进行处理,能够使保鲜盒整体在成型过程中的组织结构更加致密,整体品质大大提高。
综上所述,本申请具有以下有益效果:
(1)本申请采用天然的植物提取物来替代化学药剂作为抗菌剂,制得的保鲜盒更加环保、安全、绿色无污染,且植物原料来源广泛,成本低,具有较高的经济效益;
(2)本申请采用止痢草提取物和葡萄柚提取物两种提取物进行复配使用,两者具有协同增效作用,抗菌、抑菌性能优良;
(3)本申请在制作保鲜盒时,将抗菌剂制作成抗菌液并涂覆到聚丙烯膜材表面,然后采用高阻隔膜进行压合封存,能够防止抗菌剂在保鲜盒吸塑制作和使用过程中快速流失,大大提高了保鲜盒的抗菌使用寿命。
具体实施方式
下面结合实施例对本申请作进一步详细说明。
本申请中的色母粒包括酞箐红、酞青蓝、酞青绿、耐晒大红、大分子红、大分子黄、永固黄、永固紫、偶氮红、镉红、镉黄、钛白粉、炭黑、氧化铁红、氧化铁黄等,本申请各实施例中的色母粒选用钛白粉,其购自河北鹏宇生物科技有限公司。
高阻隔膜的结构为PP/TIE粘接层树脂/EVOH/TIE粘接层树脂/PE,购自东莞市赢德塑胶原料有限公司。
止痢草提取物购自亳州齐力堂药业有限公司;葡萄柚提取物购自上海莱博生物科技有限公司。
实施例
实施例1
一种食品保鲜盒,各组分及其相应的重量如表1所示,并通过如下步骤制备获得:
S1、混料挤出:将聚丙烯、色母粒、聚苯醚混合均匀,投入双螺杆挤出机中,挤出成型,双螺杆挤出机温度由进料口到出料口温度依次控制为195℃、205℃、215℃、225℃、235℃,得到膜材;
S2、抗菌膜材制备:将天然抗菌剂溶解于2倍重量的水中,加入0.2倍重量的十二烷基磺酸钠,搅拌均匀,得到抗菌液,将抗菌液涂覆于膜材表面,45℃下烘干;
S3、压合并吸塑成型:将表面涂覆有抗菌液的膜材和高阻隔膜经压辊进行压合,两压辊间距为0.95mm,压辊温度为27.5℃,形成片材,高阻隔膜压合厚度为30μm;将片材经过热熔软化后,置于模具的正上方,通过吸塑成型设备,吸塑成型得到食品保鲜盒。
实施例2-6
一种食品保鲜盒,与实施例1的不同之处在于,各组分及其相应的重量如表1所示。
表1实施例1-6中各组分及其重量(kg)
实施例7
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,高阻隔膜压合厚度为40μm。
实施例8
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,高阻隔膜压合厚度为50μm。
实施例9
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,两压辊间距为0.65mm。
实施例10
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,两压辊间距为1.3mm。
实施例11
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,压辊温度为25℃。
实施例12
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,压辊温度为30℃。
实施例13
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,模具使用前还经过预热处理,预热温度为40℃。
实施例14
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,模具使用前还经过预热处理,预热温度为45℃。
实施例15
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,模具使用前还经过预热处理,预热温度为50℃。
实施例16
一种食品保鲜盒,与实施例1的不同之处在于,步骤S3中,片材吸塑成型后,在成型片材的周侧用冷风进行降温处理,冷风温度为10℃。
对比例
对比例1
一种食品保鲜盒,与实施例1的不同之处在于,抗菌剂由0.3kg的止痢草提取物组成。
对比例2
一种食品保鲜盒,与实施例1的不同之处在于,抗菌剂由0.3kg的葡萄柚提取物组成。
对比例3
一种食品保鲜盒,与实施例1的不同之处在于,未添加抗菌剂。
性能检测试验
分别对实施例1-16和对比例1-3制得的食品保鲜盒进行抑菌率和防霉等级检测,检测结果计入下列表2中。
由表2中测试数据可以看出,实施例1-16中的食品保鲜盒符合相关卫生标准,且对小鼠的>10000mg/kg,属于实际无毒,防霉等级达到最高级0级,对大肠杆菌的抑制率达到99.6%以上,对金黄色葡萄球菌的抑制率达到99.5%以上,且重现性良好。说明本申请制备的食品保鲜盒具有绿色、安全,且抗菌抑菌性能良好。
由实施例1、对比例1-3可以看出,对比例3对细菌无抑制性,对比例1和对比例2对大肠杆菌的抑制率分别为78.3%、73.5%,对金黄色葡萄球菌的抑制率分别为76.9%、70.4%。这是止痢草提取物或葡萄柚提取物单独使用,均由抑菌性能,但单独使用其中一种,抑菌性能大大小于两者复配使用的抑菌性能,说明止痢草提取物和葡萄柚提取物复配使用具有一定的协同增效作用,具有良好的抑菌性能。
表2检测结果
以上所述仅是本申请的优选实施方式,本申请的保护范围并不仅局限于上述实施例,凡属于本申请思路下的技术方案均属于本申请的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理前提下的若干改进和润饰,这些改进和润饰也应视为本申请的保护范围。
Claims (9)
1.一种食品保鲜盒,其特征在于,包括如下重量份数的组分:聚丙烯90-95份、色母粒3-5份、聚苯醚3-7份、高阻隔膜5-8份、天然抗菌剂3-5份;
所述天然抗菌剂为止痢草提取物和葡萄柚提取物组成的混合物,所述止痢草提取物与葡萄柚提取物的重量比为1:(2-5)。
2.根据权利要求1所述的食品保鲜盒,其特征在于,所述止痢草提取物与葡萄柚提取物的重量比为1:3。
3.根据权利要求1所述的食品保鲜盒,其特征在于,所述高阻隔膜的结构为PP/TIE粘接层树脂/EVOH/TIE粘接层树脂/PE。
4.权利要求1-3任一所述的食品保鲜盒的制备方法,其特征在于,包括以下步骤:
S1、混料挤出:将聚丙烯、色母粒、聚苯醚混合均匀,投入双螺杆挤出机中,挤出成型,双螺杆挤出机温度由进料口到出料口温度依次控制为195℃、200-210℃、212-218℃、220-230℃、235℃,得到膜材;
S2、抗菌膜材制备:将天然抗菌剂溶解于2倍重量的水中,加入0.2倍重量的十二烷基磺酸钠,搅拌均匀,得到抗菌液,将抗菌液涂覆于膜材表面,烘干;
S3、压合并吸塑成型:将表面涂覆有抗菌液的膜材和高阻隔膜经压辊进行压合,形成片材,将片材经过热熔软化后,置于模具的正上方,通过吸塑成型设备,吸塑成型得到食品保鲜盒。
5.根据权利要求4所述的食品保鲜盒的制备方法,其特征在于,步骤S3中,膜材和高阻隔膜经压辊进行压合时,两压辊间的距离为0.65-1.3mm。
6.根据权利要求4所述的食品保鲜盒的制备方法,其特征在于,步骤S3中,所述压辊的温度控制为25-30℃。
7.根据权利要求4所述的食品保鲜盒的制备方法,其特征在于,步骤S3中,所述高阻隔膜在膜材上的压合厚度为30-50μm。
8.根据权利要求4所述的食品保鲜盒的制备方法,其特征在于,步骤S3中,所述模具在使用前还经过预热处理,预热温度为40-50℃。
9.根据权利要求4所述的食品保鲜盒的制备方法,其特征在于,步骤S3中,所述片材吸塑成型后,在成型片材的周侧用冷风进行降温处理。
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