CN113956524A - 一种背涂效果良好的可降解包装板材 - Google Patents
一种背涂效果良好的可降解包装板材 Download PDFInfo
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Abstract
本发明公开了一种背涂效果良好的可降解包装板材,通过以PP树脂和聚乙醇酸作为主体有机材料,以石英岩、蒙脱土作为无机填料,以钛白粉作为该板体的整体外观色泽调配的染料或颜料,加上添加其他助剂进行混合;同时通过将由环氧树脂、有机溶剂、固化剂和稀释剂组成的背涂层设置在板体的背面上,对板体的背面设置保护层,通过板体的背面与使背涂层相结合,使该可降解包装板材相比现有的包装板材外观效果好,使该可降解包装板材相比现有的包装板材外观效果好,抗污染能力强,不易于积尘,易于清洁,具有良好的降解效果,可通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
Description
本申请为分案申请,原申请的申请号为2019106150768,申请日为2019年 07月09号,发明专利名称为:一种背涂效果良好的可降解包装板材及其制备方法。
技术领域
本发明属于包装材料技术领域,尤其涉及一种背涂效果良好的可降解包装板材。
背景技术
包装板材是指用于制造包装容器、包装装潢、包装印刷、包装运输等满足产品包装要求所使用的材料,它即包括金属、塑料、玻璃、陶瓷、纸、竹本、野生蘑类、天然纤维、化学纤维、复合材料等主要包装材料,又包括捆扎带、装潢、印刷材料等辅助材料。包装板材在整个包装工业中占有重要地位,是发展包装技术、提高包装质量和降低包装成本的基础。因此,了解包装板材的性能、应用范围和发展趋势,对合理选用包装板材,扩大包装板材来源,采用新包装和加工新技术,创造新型包装和包装技术,提高包装技术水平与管理水平,都具有重要的意义。但是现有的包装板材作为包装材料性能差,特别表现在外观效果、抗污能力以及废弃后自身降解效果等方面。
发明内容
本发明的目的是克服了现有技术的问题,提供了一种制造成本低,外观效果鲜亮,抗污染能力强,易于清洁且通过掩埋可逐渐达到完全降解,具有良好的降解效果,对保护环境十分有利的背涂效果良好的可降解包装板材。
为了达到上述目的,本发明采用以下方案:
一种背涂效果良好的可降解包装板材,包括板体和由背涂液涂覆于该板体上烘干形成的背涂层,所述的背涂效果良好的可降解包装板材采用以下步骤制备而成:
一、可降解包装板材的板体制备
(1)材料处理与混合
A、将石英岩、蒙脱土和钛白粉添加进研磨机进行研磨,研磨时间35~ 40min,再通过100目筛,得到混合料A;
B、将PP树脂和聚乙醇酸在混料搅拌机中混合18~25分钟,得到混合料 B;
C、将混合料A、混合料B、相容剂和光稳定剂加入到混合料B中,通过在搅拌釜中混合搅拌20~30分钟,搅拌速率为2600-4000转/分;温度控制在 80~135℃,再通过催化聚合形成混合料C;
(2)真空干燥
将所述混合料C在25~45℃的环境下,真空干燥3~7个小时;
(3)熔融挤出
经过真空干燥后,将所述混合料C放入双螺杆挤出机内加热熔融挤出塑化,即得半成品,其工作条件为:温度为210~250℃,螺杆转速为440~ 450r/min;
(4)造粒及后处理
将所述半成品进行拉条、冷气冷却、干燥、造粒,其中冷却过程中冷气的温度保持在35~40℃;最后投入注塑机进行注射成型,得到板体;
二、背涂液的制备
(1)将有机溶剂、稀释剂通过搅拌进行混合,搅拌时间为20~30分钟;得到混合液D;
(2)将混合液D、环氧树脂在反应釜中混合搅拌15~20分钟,再加入固化剂混合搅拌7~15分钟;然后通过加成聚合反应,加成聚合反应的温度控制到75~100℃,时间在5~8小时,得到背涂液;
三、板材的形成
将板体放进配备好背涂液的涂覆机内,通过刮面滚压输送的方式对板体的背面进行背涂处理,湿涂量为1~2.5g/m2,输送速度30~55m/min,然后对背涂处理后的板体通过进行烘干,烘干温度为60~70℃,得到背涂效果良好的可降解包装板材。
该背涂效果良好的可降解包装板材的材料的制备方法成工艺简单,反应易于控制、重复性好、生产质量好,工艺合成环保,安全,气味极少。
该背涂层由背涂液涂覆于所述板体的材料按重量百分比由以下组分组成:
所述背涂层的材料按重量百分比由以下组分组成:
本发明的背涂效果良好的可降解包装板材的板体主要由PP树脂、聚乙醇酸、石英岩、蒙脱土、钛白粉和其他助剂制备而成,这些材料来源多,成本低,以及该背涂效果良好的可降解包装板材制造工艺简单,从而使制备该中背涂效果良好的可降解包装板材总成本低,适合大量生产。通过以PP树脂和聚乙醇酸作为主体有机材料,以石英岩、蒙脱土作为无机填料,以钛白粉作为该板体的整体外观色泽调配的染料或颜料,加上添加其他助剂进行混合;同时通过将由环氧树脂、有机溶剂、固化剂和稀释剂组成的背涂层设置在板体的背面上,对板体的背面设置保护层,通过板体与使背涂层相结合,使该可降解包装板材相比现有的包装板材外观效果好,抗污染能力强,不易于积尘,易于清洁,而且掩埋在对湿度达到50%以上的泥地内,在掩埋达到1-2年后,该背涂效果良好的可降解包装板材严重破损,几乎降解,降解率达到95%以上,具有良好的降解效果,可通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
进一步地,所述PP树脂为均聚聚丙烯和嵌段共聚聚丙烯中的一种或两种。通过均聚聚丙烯、嵌段共聚聚丙烯作为PP树脂,以提高该背涂效果良好的可降解包装板材机械韧性,具有良好的击强度和刚性,便于对产品包装,以及与聚乙醇酸等材料相结合形成的该背涂效果良好的可降解包装板材,掩埋在对湿度达到50%以上的泥地内,在掩埋达到1-2年后,在聚乙醇酸作用下,促进PP树脂进行降解,使该背涂效果良好的可降解包装板材严重破损,几乎降解,降解率达到95%以上,产生对环境无坏的二氧化碳和水。
进一步地,所述蒙脱土的粒径小于2μm。通过控制蒙脱土的用量及颗粒大小来控制产品的摩擦系数,以提高该背涂效果良好的可降解包装板材力学性能,具有良好的刚性和强度,同时蒙脱土本身就以二氧化硅为主,该背涂效果良好的可降解包装板材在降解后,不会破坏环境。
进一步地,所述其他助剂包括相容剂和光稳定剂。通过将相容剂添加在材料配混中,便于PP树脂、聚乙醇酸以及其他材料之间聚合形成,增强各材料之间聚合的稳定性,进而使该背涂效果良好的可降解包装板材获得良好的力学性能,具有良好的刚性和强度,以及具备良好的降解效果,废弃后,通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
进一步地,所述相容剂为马来酸酐接枝聚丙烯;所述马来酸酐接枝聚丙烯包括马来酸酐、聚丙烯和引发助剂;所述引发助剂包括过氧化二异丙苯或过氧化二叔丁基。以马来酸酐、聚丙烯和引发助剂形成相容剂,强各材料之间聚合的稳定性,促进各材料之间融合,进而可以使该背涂效果良好的可降解包装板材具有良好的刚性和强度,以及具备良好的降解效果,废弃后,通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
进一步地,所述光稳定剂为二苯甲酮类紫外线吸收剂、苯并三唑类紫外线吸收剂的一种或多种。通过这些光稳定剂能屏蔽或吸收紫外线的能量,猝灭单线态氧及将氢过氧化物分解成非活性物质等功能,使背涂效果良好的可降解包装板材在光的辐射下,能排除或减缓光化学反应可能性,阻止或延迟光老化的过程,从而达到延长该背涂效果良好的可降解包装板材的使用寿命的目的。
进一步地,所述环氧树脂为缩水甘油酯型环氧树脂、缩水甘油胺型环氧树脂中的一种或多种。利用缩水甘油酯型环氧树脂、缩水甘油胺型环氧树脂或者两种的混合与其他的材料相作用,形成涂胶层具有良好的粘结强度和耐化学性能。
进一步地,所述固化剂为甲基纳迪克酸酐、2-乙基-4-甲基咪唑、左旋-反式-1,2-环己二胺的一种或多种。该固化剂主要用于树脂固化,便于聚合形成背涂液,进而可以便于在板体上设置涂胶层,以提高该板材整体的外观效果效果,抗污染能力强,不易于积尘,易于清洁。
进一步地,所述稀释剂为1,4-丁二醇缩水甘油醚、苄基缩水甘油醚、1,6- 己二醇二缩水甘油醚、乙二醇二缩水甘油醚中的一种。环氧树脂本身很浓稠,而稀释剂的作用主要是将环氧树脂浓度降低,便于形成在稀释环氧树脂,同时也可以参加反应,其中,该稀释剂中的分子中含有活性基团,能与胶黏剂的固化剂发生反应而无气体逸出,对固化后胶层的性能一般并无影响,有良好的环保性能。
进一步地,所述有机溶剂二为甲苯、N,N-二甲基甲酰胺、四氢呋喃、N,N- 二甲基乙酰胺和1,4-二氧六环中的一种或两种以上。通过这些有机溶剂,便于环氧树脂充分反应混合在一起,便于聚合形成背涂液,进而可以便于在板体上设置涂胶层,以提高该板材整体的外观效果效果,抗污染能力强,不易于积尘,易于清洁。
进一步地,所述板体(1)的厚度为1mm~8mm;所述背涂层的厚度为4μ m~6μm。通过注射成膜合理控制该背涂效果良好的可降解包装板材的厚度,以及控制涂覆的背涂层的厚度,使该背涂效果良好的可降解包装板材的重量轻,便于使用,实用性强,同时具有良好的外观效果。
与现有的技术相比,本发明具有如下优点:
1.本发明的背涂效果良好的可降解包装板材的板体主要由PP树脂、聚乙醇酸、石英岩、蒙脱土、钛白粉和其他助剂制备而成,这些材料来源多,成本低,以及该背涂效果良好的可降解包装板材制造工艺简单,从而使制备该中背涂效果良好的可降解包装板材总成本低,适合大量生产。
2.本发明通过以PP树脂和聚乙醇酸作为主体有机材料,以石英岩、蒙脱土作为无机填料,以钛白粉作为该板体的整体外观色泽调配的染料或颜料,加上添加其他助剂进行混合;同时通过将由环氧树脂、有机溶剂、固化剂和稀释剂组成的背涂层设置在板体的背面上,对板体的背面设置保护层,通过板体的背面与使背涂层相结合,使该可降解包装板材相比现有的包装板材外观效果好,使该可降解包装板材相比现有的包装板材外观效果好,抗污染能力强,不易于积尘,易于清洁,而且掩埋在对湿度达到50%以上的泥地内,在掩埋达到 1-2年后,该背涂效果良好的可降解包装板材严重破损,几乎降解,降解率达到95%以上,具有良好的降解效果,可通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
3.本发明的背涂效果良好的可降解包装板材的材料的制备方法成工艺简单,反应易于控制、重复性好、生产质量好,工艺合成环保,安全,气味极少。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1是背涂效果良好的可降解包装板材的板体的横截面示意图。
具体实施方式
如图1所示,下面结合实施例1-6对本发明作进一步描述:
一种背涂效果良好的可降解包装板材的制备方法,包括以下的步骤:
一、可降解包装板材的板体制备
(1)材料处理与混合
A、将石英岩、蒙脱土和钛白粉添加进研磨机进行研磨,研磨时间35~ 40min,再通过100目筛,得到混合料A;
B、将PP树脂和聚乙醇酸在混料搅拌机中混合18~25分钟,得到混合料 B;
C、将混合料A、混合料B、相容剂和光稳定剂加入到混合料B中,通过在搅拌釜中混合搅拌20~30分钟,搅拌速率为2600-4000转/分;温度控制在 80~135℃,再通过催化聚合形成混合料C;
(2)真空干燥
将所述混合料C在25~45℃的环境下,真空干燥3~7个小时;
(3)熔融挤出
经过真空干燥后,将所述混合料C放入双螺杆挤出机内加热熔融挤出塑化,即得半成品,其工作条件为:温度为210~250℃,螺杆转速为440~ 450r/min;
(4)造粒及后处理
将所述半成品进行拉条、冷气冷却、干燥、造粒,其中冷却过程中冷气的温度保持在35~40℃;最后投入注塑机进行注射成型,得到板体1。
二、背涂液的制备
(1)将有机溶剂、稀释剂通过搅拌进行混合,搅拌时间为20~30分钟;得到混合液D;
(2)将混合液D、环氧树脂在反应釜中混合搅拌15~20分钟,再加入固化剂混合搅拌7~15分钟;然后通过加成聚合反应,加成聚合反应的温度控制到75~100℃,时间在5~8小时,得到背涂液。
三、板材的形成
将板体1放进配备好背涂液的涂覆机内,通过刮面滚压输送的方式对板体 1的背面进行背涂处理,湿涂量为1~2.5g/m2,输送速度30~55m/min,然后对背涂处理后的板体1通过进行烘干,烘干温度为60~70℃,得到背涂效果良好的可降解包装板材。
表1:实施例1~6板体1各组分比例
表2:实施例1~6背涂层2各组分比例
表3:实施例1~6的工艺条件
表4实施例1~6中测试数据
本申请通过将板体1放进配备好背涂液的涂覆机内,通过刮面滚压输送的方式对板体1的背面进行背涂处理,烘干得到的背涂效果良好的可降解包装板材,表面光滑,表面没有出现气泡和脱层的现象,并且具有良好的粘结强度、耐污性强,以及高断裂伸长率,使该可降解包装板材相比现有的包装板材外观效果好,抗污染能力强,不易于积尘,易于清洁。
表5:采取国家标准GB 18006.1-1999,将上述实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料置于不同环境中,在不同时间内,测试产品的外表面有无破损、对折试验15次、跌落试验。
将实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料掩埋在相对湿度达到50%的泥地内,然后对实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料进行试验测试。
通过实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料放置在干旱地中的试验判断,该背涂效果良好的可降解包装板材通过掩埋在对湿度达到50%的泥地内,在掩埋达到1-2年后,背涂效果良好的可降解包装板材严重破损,几乎降解,降解率达到95%以上,具有良好的降解效果,可通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
表5:将实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料掩埋在相对湿度达到80%的泥地内,然后对实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料进行试验测试。
通过实施例1~6的背涂效果良好的可降解包装板材和加入对比例的聚丙烯包装材料放置在干旱地中的试验判断,该背涂效果良好的可降解包装板材通过掩埋在对湿度达到80%的泥地内,在掩埋达到1-2年后,背涂效果良好的可降解包装板材严重破损,几乎降解,降解率达到97%以上,具有良好的降解效果,可通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能目的。
综上试验所述,该可降解包装板材相比现有的包装板材外观效果好,抗污染能力强,不易于积尘,易于清洁,而且掩埋在对湿度达到50%以上的泥地内,在掩埋达到1-2年后,该背涂效果良好的可降解包装板材严重破损,几乎降解,降解率达到95%以上,具有良好的降解效果,可通过填埋在自然环境中可逐渐达到完全降解,达到低碳、环保、节能的目的。
综上对本申请的实施方式作了详细说明,但是本申请不限于上述实施方式。即使其对本申请作出各种变化,则仍落入在本申请的保护范围。
Claims (10)
1.一种背涂效果良好的可降解包装板材,其特征在于,包括板体(1)和由背涂液涂覆于该板体(1)的背面上烘干形成的背涂层(2),所述的背涂效果良好的可降解包装板材采用以下步骤制备而成:
一、可降解包装板材的板体(1)制备
(1)材料处理与混合
A、将石英岩、蒙脱土和钛白粉添加进研磨机进行研磨,研磨时间35~40min,再通过100目筛,得到混合料A;
B、将PP树脂和聚乙醇酸在混料搅拌机中混合18~25分钟,得到混合料B;
C、将混合料A、混合料B、相容剂和光稳定剂加入到混合料B中,通过在搅拌釜中混合搅拌20~30分钟,搅拌速率为2600-4000转/分;温度控制在80~135℃,再通过催化聚合形成混合料C;
(2)真空干燥
将所述混合料C在25~45℃的环境下,真空干燥3~7个小时;
(3)熔融挤出
经过真空干燥后,将所述混合料C放入双螺杆挤出机内加热熔融挤出塑化,即得半成品,其工作条件为:温度为210~250℃,螺杆转速为440~450r/min;
(4)造粒及后处理
将所述半成品进行拉条、冷气冷却、干燥、造粒,其中冷却过程中冷气的温度保持在35~40℃;最后投入注塑机进行注射成型,得到板体(1);
二、背涂液的制备
(1)将有机溶剂、稀释剂通过搅拌进行混合,搅拌时间为20~30分钟;得到混合液D;
(2)将混合液D、环氧树脂在反应釜中混合搅拌15~20分钟,再加入固化剂混合搅拌7~15分钟;然后通过加成聚合反应,加成聚合反应的温度控制到75~100℃,时间在5~8小时,得到背涂液;
三、板材的形成
将板体(1)放进配备好背涂液的涂覆机内,通过刮面滚压输送的方式对板体(1)的背面进行背涂处理,湿涂量为1~2.5g/m2,输送速度30~55m/min,然后对背涂处理后的板体(1)通过进行烘干,烘干温度为60~70℃,得到背涂效果良好的可降解包装板材。
3.根据权利要求2所述的背涂效果良好的可降解包装板材,其特征在于,所述其他助剂包括相容剂和光稳定剂。
4.根据权利要求1或3所述的背涂效果良好的可降解包装板材,其特征在于,所述相容剂为马来酸酐接枝聚丙烯;所述马来酸酐接枝聚丙烯包括马来酸酐、聚丙烯和引发助剂;所述引发助剂包括过氧化二异丙苯或过氧化二叔丁基。
5.根据权利要求1或3所述的背涂效果良好的可降解包装板材,其特征在于,所述光稳定剂为二苯甲酮类紫外线吸收剂、苯并三唑类紫外线吸收剂的一种或多种。
6.根据权利要求1所述的背涂效果良好的可降解包装板材,其特征在于,所述环氧树脂为缩水甘油酯型环氧树脂、缩水甘油胺型环氧树脂中的一种或多种。
7.根据权利要求1所述的背涂效果良好的可降解包装板材,其特征在于,所述固化剂为甲基纳迪克酸酐、2-乙基-4-甲基咪唑、左旋-反式-1,2-环己二胺的一种。
8.根据权利要求1所述的背涂效果良好的可降解包装板材,其特征在于,所述稀释剂为1,4-丁二醇缩水甘油醚、苄基缩水甘油醚、1,6-己二醇二缩水甘油醚、乙二醇二缩水甘油醚中的一种。
9.根据权利要求1所述的背涂效果良好的可降解包装板材,其特征在于,所述有机溶剂二为甲苯、N,N-二甲基甲酰胺、四氢呋喃、N,N-二甲基乙酰胺和1,4-二氧六环中的一种或两种以上。
10.根据权利要求1所述的背涂效果良好的可降解包装板材,其特征在于,所述板体(1)的厚度为1mm~8mm;所述背涂层(2)的厚度为4μm~6μm。
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