CN104553212A - 一种新型防水抗压隔热复合纸板 - Google Patents

一种新型防水抗压隔热复合纸板 Download PDF

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CN104553212A
CN104553212A CN201510015797.7A CN201510015797A CN104553212A CN 104553212 A CN104553212 A CN 104553212A CN 201510015797 A CN201510015797 A CN 201510015797A CN 104553212 A CN104553212 A CN 104553212A
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吴培桂
罗礼发
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Packaging Industry (zhongshan) Co Ltd
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Abstract

本发明公开一种新型防水抗压隔热复合纸板,包括纸板基板,纸板基板上、下均设有全降解发泡层,全降解发泡层外设有阻隔膜层,阻隔膜层外设有面纸层,纸板基板与全降解发泡层以环保淀粉胶进行黏合,全降解发泡层与阻隔膜层通过无机纤维粘合层进行黏合。全降解发泡层具有良好的力学性能,且能提供良好的隔热性和防水防潮性;而纸板基板本身也具备了较好的强度和抗冲性,与发泡层相互配合可得到更优秀的抗冲性。从而,发泡层与纸板基板配合将使得复合纸板具有更优异的力学性能和隔热、防水特性。本复合纸板具有优异的防水性、抗压性及隔热性。同时,该复合纸板用料环保,可一次性成型,工艺简单,是一种可广泛应用的环保型板材。

Description

一种新型防水抗压隔热复合纸板
技术领域
本发明涉及复合纸板领域,尤其是涉及一种具有优异防水性、抗压性及隔热性的,且环保的防水抗压隔热复合纸板。
背景技术
在包装领域,各种不同的材料被广泛应用。塑料材料具有良好的和可调整的性能,但由于其来源于石油,非可再生,而且塑料材料不可降解,会造成白色污染。故各种不同的环保替代材料被开发出来。而纸板材料以其环保的特性、良好的性能及低廉的成本被广泛应用。瓦楞纸板是近年来出现并使用最多的纸板材料,因为瓦楞的存在而使得瓦楞纸板具有了较高的强度,瓦楞的形式较多,如U型、V型、方型、交替波等,不同的瓦楞波型赋予了瓦楞纸板差异性的性能特点。但总体来说,其抗冲性较差。蜂窝纸板的出现弥补了这一缺陷,蜂窝纸板内有蜂窝状的结构,可较好的平均吸收能量从而拥有很好的缓冲性,两者结合使用将使得复合纸板具有更平衡的力学性能,即优异的抗压和抗冲特性。而在当今商品极大丰富和电子商务迅速发展的今天,除了力学性能外,也对包装的其他功能化性能也提出了要求,如为了保护内包物,还需要包装体具有良好的抗压、防水防潮特性,如内包物对温度敏感,还需要包装体具有明显的隔热效果。在以外的包装中,如需达到以上效果,发泡塑料是一种较好的选择,如PS发泡材料、PE发泡材料等,发泡材料的孔结构使得材料具有了良好的阻隔性,而一定的厚度也使得材料具有良好的抗冲性能,但此类材料同样存在环保的问题,尤其在部分欧盟国家,已被明令禁止使用。故开发具有良好环保特性的功能性包装材料已成为研究领域的热点。在纸板复合领域,多种形式的复合被开发出来,包括瓦楞与蜂窝的特殊结构搭配,其他复合板如木塑板,发泡板的复合等,但从总体来说,原有的各种复合板尤其是发泡板无论是从综合力学性能还是从各种功能性上来说均存在一定缺陷,尤其是可降解发泡材料普遍较软,且容易吸潮而严重影响复合板的性能,故开发一种新型的纸板复合材料以克服此缺陷,将极大的提高复合板的应用范围。
发明内容
本发明的目的是提供一种具有优异防水性、抗压性及隔热性的,且环保的防水抗压隔热复合纸板。
本发明提出一种新型防水抗压隔热复合纸板,由多层材料复合而成,包括上层结构、下层结构及设置在所述上层结构与所述下层结构之间的纸板基板,所述上层结构从上至下依次包括上面纸层、上阻隔膜层和上全降解发泡层,所述下层结构从下至上依次包括下面纸层、下阻隔膜层和下全降解发泡层,所述纸板基板与所述上全降解发泡层、所述下全降解发泡层之间通过环保淀粉胶粘合,所述上全降解发泡层与所述上阻隔膜层之间通过无机纤维粘合层I粘合,所述下全降解发泡层与所述下阻隔膜层之间通过无机纤维粘合层II粘合。
所述上全降解发泡层和所述下全降解发泡层均为以植物纤维、聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇为主料,并加入辅料SiO2气凝胶粉末、聚乳酸-聚己内酯嵌段共聚物、抗氧化剂、加工助剂,以水蒸汽为发泡剂通过原位挤出发泡而成的板材;所述上全降解发泡层和所述下全降解发泡层中各组分的质量比按以下份数复配:植物纤维 40-60份,聚乳酸 30-50份,聚己内酯 15-30份,脂肪族聚碳酸酯 15-30份,聚乙烯醇 8-15份,SiO2气凝胶粉末3-6份,聚乳酸-聚己内酯嵌段共聚物 5-10份,抗氧化剂 2-4份,加工助剂 2-4份。其采用挤出机直接挤出发泡成板,其工艺包括材料的预处理和挤出发泡工艺:
材料预处理:
I:植物纤维的处理:将植物粗纤维投入破碎机中破碎至500-1000目,后将其浸泡入质量浓度8-14wt%的碱液中,于室温下浸泡3-5小时后,于20-30wt%质量浓度的酸液中在60℃下浸泡2-4小时后过滤,以弱碱水清洗后于清水洗至中性并出料。其中,酸液中酸的组成为质量比为3:1的盐酸和醋酸。
II:物料的干燥:将准备好的植物纤维于真空干燥箱内在30℃下干燥12小时,聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇、聚乳酸-聚己内酯嵌段共聚物于普通干燥箱内在60℃下干燥6-8小时,备用。
挤出发泡工艺:
挤出发泡过程采用多段进料控温控压挤出设备,即在螺杆输送段料筒内送入聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇、SiO2气凝胶粉末、聚乳酸-聚己内酯嵌段共聚物,于压缩段送入植物纤维,并通入水蒸气。温度控制在170-190度之间,水蒸气压力控制在1-1.5MPa之间。物料在挤出机中停留时间为2-3分钟。
进一步,所述环保淀粉胶为以淀粉、氧化剂高锰酸钾、脱水明矾、轻质氧化镁、酯化剂磷酸钠、接枝共聚试剂脲醛胶粘剂、聚乙烯醇和去离子水为主料,并加入辅料膨胀剂、PH调节剂、淀粉接枝甲基丙烯酸缩水甘油酯,在一定条件下调和后形成的胶粘剂;所述环保淀粉胶的各组分的质量比按以下份数复配:淀粉 320-500份,氧化剂高锰酸钾 2-8份,酯化剂磷酸5-20份,脱水明矾 6-20份,轻质氧化镁 7-15份,接枝共聚剂脲醛胶粘剂 5-15份,聚乙烯醇 2-4份,膨胀剂 2-10份, PH调节剂 15-20份,淀粉接枝甲基丙烯酸缩水甘油酯5-15份,去离子水 1000-1200份。
进一步,所述纸板基板为单层或多层的蜂窝纸板、瓦楞纸板或蜂窝纸板与瓦楞纸板的复合。
进一步,所述纸板基板为两层蜂窝纸板夹一层瓦楞纸板的结构,两层所述蜂窝纸板的蜂窝结构完全对应,所述蜂窝纸板与所述瓦楞纸板之间通过所述环保淀粉胶粘合。
进一步,所述蜂窝纸板的蜂窝纸芯的截面形态为菱形、正四边形或正六边形,所述瓦楞纸板的的瓦楞纸芯的截面形态为U型、V型或方型的波浪瓦楞。
进一步,所述上阻隔膜层和所述下阻隔膜层均为多层共挤尼龙膜或多层共挤EVOH膜。
进一步,所述EVOH膜或所述尼龙膜的层数介于3-5层之间。
进一步,所述无机纤维粘合层I和所述无机纤维粘合层II由无机超细纤维棉与水基性粘接剂混合后喷涂而成。其制作工艺是:将预先经特殊工艺制造加工的无机超细纤维棉与特有水基性粘接剂混合,混合材料经过喷途后,自然干燥,形成具有一定强度和厚度的无接缝、整体稳定密闭的无机纤维粘合层。该无机纤维粘合层呈现弹性的自然纹理和纤维质地,具有保温隔热的效果和粘合效果。
本发明的新型防水抗压隔热复合纸板的有益效果为:
本发明的新型防水抗压隔热复合纸板由多层材料复合而成,其中,上全降解发泡层和下全降解发泡层具有良好的力学性能,如抗冲性、抗压性等,同时,由于其均匀闭孔结构的存在,发泡层能提供良好的隔热性和防水防潮性;而纸板基板本身也具备了较好的强度和抗冲性,与发泡层相互配合可得到更优秀的抗冲性。从而,发泡层与纸板基板配合将使得复合纸板具有更优异的力学性能和隔热、防水特性。
而且,在粘合时所采用的环保淀粉胶因为特殊酯化剂、脲醛胶粘剂的添加,使环保淀粉胶具有良好的防水性;上、下阻隔膜层的设置有效的防止了水汽的渗入;无机纤维粘合层I和II作为粘合剂,其本身也具有优异的隔热和防水效果。故综合以上各层的性能及其搭配赋予了本复合纸板优异的性能,本复合纸板具有优异的防水性、抗压性及隔热性。
附图说明
图1为本发明的一种新型防水抗压隔热复合纸板的实施例的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
具体实施方式
应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
参照图1,提出本发明的一种新型防水抗压隔热复合纸板的一实施例:
一种新型防水抗压隔热复合纸板,由多层材料复合而成,包括上层结构、下层结构及设置在上层结构与下层结构之间的纸板基板1,上层结构从上至下依次包括上面纸层5-1、上阻隔膜层4-1和上全降解发泡层2-1,下层结构从下至上依次包括下面纸层5-2、下阻隔膜层4-2和下全降解发泡层2-2,纸板基板1与上全降解发泡层2-1、下全降解发泡层2-2之间通过环保淀粉胶粘合,上全降解发泡层2-1与上阻隔膜层4-1之间通过无机纤维粘合层I3-1粘合,下全降解发泡层2-2与下阻隔膜层4-2之间通过无机纤维粘合层II3-2粘合。
其中,纸板基板1为两层蜂窝纸板夹一层瓦楞纸板的结构,两层蜂窝纸板的蜂窝结构完全对应,蜂窝纸板与瓦楞纸板之间通过环保淀粉胶粘合。
该蜂窝纸板的蜂窝纸芯的截面形态为菱形,瓦楞纸板的的瓦楞纸芯的截面形态为U型的波浪瓦楞。
该上全降解发泡层2-1和下全降解发泡层2-2均为以植物纤维、聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇为主料,并加入辅料SiO2气凝胶粉末、聚乳酸-聚己内酯嵌段共聚物、抗氧化剂、加工助剂,以水蒸汽作为发泡剂,通过原位挤出发泡而成的板材。上全降解发泡层2-1和下全降解发泡层2-2中各组分的质量比按以下份数复配:植物纤维 50份,聚乳酸 40份,聚己内酯 20份,脂肪族聚碳酸酯 25份,聚乙烯醇 10份,SiO2气凝胶粉末5份,聚乳酸-聚己内酯嵌段共聚物 8份,抗氧化剂 3份,加工助剂 3份。其采用挤出机直接挤出发泡成板,其工艺包括材料的预处理和挤出发泡工艺:
材料预处理:
I:植物纤维的处理:将植物粗纤维投入破碎机中破碎至500-1000目,后将其浸泡入质量浓度10wt%的碱液中,于室温下浸泡4小时后,于25wt%质量浓度的酸液中在60℃下浸泡3小时后过滤,以弱碱水清洗后于清水洗至中性并出料。其中,酸液中酸的组成为质量比为3:1的盐酸和醋酸。
II:物料的干燥:将准备好的植物纤维于真空干燥箱内在30℃下干燥12小时,聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇、聚乳酸-聚己内酯嵌段共聚物于普通干燥箱内在60℃下干燥8小时,备用。
挤出发泡工艺:
挤出发泡过程采用多段进料控温控压挤出设备,即在螺杆输送段料筒内送入聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇、SiO2气凝胶粉末、聚乳酸-聚己内酯嵌段共聚物,于压缩段送入植物纤维,并通入水蒸气。温度控制在170-190度之间,水蒸气压力控制在1-1.5MPa之间。物料在挤出机中停留时间为2-3分钟。
该环保淀粉胶为以淀粉、氧化剂高锰酸钾、脱水明矾、轻质氧化镁、酯化剂磷酸钠、接枝共聚试剂脲醛胶粘剂、聚乙烯醇和去离子水为主料,并加入少量辅料膨胀剂、PH调节剂、淀粉接枝甲基丙烯酸缩水甘油酯,在一定条件下调和后形成的胶粘剂;环保淀粉胶的各组分的质量比按以下份数复配:淀粉 450份,氧化剂高锰酸钾 6份,酯化剂磷酸15份,脱水明矾 15份,轻质氧化镁 12份,接枝共聚剂脲醛胶粘剂 10份,聚乙烯醇 3份,膨胀剂 6份, PH调节剂 18份,淀粉接枝甲基丙烯酸缩水甘油酯10份,去离子水 1050份。
该上阻隔膜层4-1和下阻隔膜层4-2均为4层共挤EVOH膜。
该无机纤维粘合层I3-1和无机纤维粘合层II3-2由无机超细纤维棉与水基性粘接剂混合后喷涂而成,其制作工艺是:将预先经特殊工艺制造加工的无机超细纤维棉与特有水基性粘接剂混合,混合材料经过喷途后,自然干燥,形成具有一定强度和厚度的无接缝、整体稳定密闭的无机纤维粘合层。该无机纤维粘合层呈现弹性的自然纹理和纤维质地,具有保温隔热的效果和粘合效果。
本新型防水抗压隔热复合纸板由多层材料复合而成,其中,上全降解发泡层2-1和下全降解发泡层2-2具有良好的力学性能,如抗冲性、抗压性等,同时,由于其均匀闭孔结构的存在,上全降解发泡层2-1和下全降解发泡层2-2能提供良好的隔热性和防水防潮性;而纸板基板1本身也具备了较好的强度和抗冲性,与上全降解发泡层2-1、下全降解发泡层2-2相互配合可得到更优秀的抗冲性。从而,上全降解发泡层2-1、下全降解发泡层2-2与纸板基板1配合将使得复合纸板具有更优异的力学性能和隔热、防水特性。
而且,在粘合时所采用的环保淀粉胶因为特殊酯化剂、脲醛胶粘剂的添加,使环保淀粉胶具有良好的防水性;上、下阻隔膜层4-1、4-2的设置有效的防止了水汽的渗入;无机纤维粘合层I3-1和无机纤维粘合层II3-2作为粘合剂,其本身也具有优异的隔热和防水效果。故综合以上各层的性能及其搭配赋予了本复合纸板优异的性能,本复合纸板具有优异的防水性、抗压性及隔热性。
以上所述仅为本发明的优选实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (7)

1.一种新型防水抗压隔热复合纸板,由多层材料复合而成,其特征在于,包括上层结构、下层结构及设置在所述上层结构与所述下层结构之间的纸板基板,所述上层结构从上至下依次包括上面纸层、上阻隔膜层和上全降解发泡层,所述下层结构从下至上依次包括下面纸层、下阻隔膜层和下全降解发泡层,所述纸板基板与所述上全降解发泡层、所述下全降解发泡层之间通过环保淀粉胶粘合,所述上全降解发泡层与所述上阻隔膜层之间通过无机纤维粘合层I粘合,所述下全降解发泡层与所述下阻隔膜层之间通过无机纤维粘合层II粘合;
所述上全降解发泡层和所述下全降解发泡层均为以植物纤维、聚乳酸、聚己内酯、脂肪族聚碳酸酯、聚乙烯醇为主料,并加入辅料SiO2气凝胶粉末、聚乳酸-聚己内酯嵌段共聚物、抗氧化剂、加工助剂,以水蒸汽为发泡剂通过原位挤出发泡而成的板材;所述上全降解发泡层和所述下全降解发泡层中各组分的质量比按以下份数复配:植物纤维 40-60份,聚乳酸 30-50份,聚己内酯 15-30份,脂肪族聚碳酸酯 15-30份,聚乙烯醇 8-15份,SiO2气凝胶粉末3-6份,聚乳酸-聚己内酯嵌段共聚物 5-10份,抗氧化剂 2-4份,加工助剂 2-4份;
所述环保淀粉胶为以淀粉、氧化剂高锰酸钾、脱水明矾、轻质氧化镁、酯化剂磷酸钠、接枝共聚试剂脲醛胶粘剂、聚乙烯醇和去离子水为主料,并加入辅料膨胀剂、PH调节剂、淀粉接枝甲基丙烯酸缩水甘油酯,调和后形成的胶粘剂;所述环保淀粉胶的各组分的质量比按以下份数复配:淀粉 320-500份,氧化剂高锰酸钾 2-8份,酯化剂磷酸5-20份,脱水明矾 6-20份,轻质氧化镁 7-15份,接枝共聚剂脲醛胶粘剂 5-15份,聚乙烯醇 2-4份,膨胀剂 2-10份, PH调节剂 15-20份,淀粉接枝甲基丙烯酸缩水甘油酯5-15份,去离子水 1000-1200份。
2.根据权利要求1所述的新型防水抗压隔热复合纸板,其特征在于,所述纸板基板为单层或多层的蜂窝纸板、瓦楞纸板或蜂窝纸板与瓦楞纸板的复合。
3.根据权利要求1或2所述的新型防水抗压隔热复合纸板,其特征在于,所述纸板基板为两层蜂窝纸板夹一层瓦楞纸板的结构,两层所述蜂窝纸板的蜂窝结构完全对应,所述蜂窝纸板与所述瓦楞纸板之间通过所述环保淀粉胶粘合。
4.根据权利要求3所述的新型防水抗压隔热复合纸板,其特征在于,所述蜂窝纸板的蜂窝纸芯的截面形态为菱形、正四边形或正六边形,所述瓦楞纸板的的瓦楞纸芯的截面形态为U型、V型或方型的波浪瓦楞。
5.根据权利要求1所述的新型防水抗压隔热复合纸板,其特征在于,所述上阻隔膜层和所述下阻隔膜层均为多层共挤尼龙膜或多层共挤EVOH膜。
6.根据权利要求5所述的新型防水抗压隔热复合纸板,其特征在于,所述EVOH膜或所述尼龙膜的层数介于3-5层之间。
7.根据权利要求1所述的新型防水抗压隔热复合纸板,其特征在于,所述无机纤维粘合层I和所述无机纤维粘合层II由无机超细纤维棉与水基性粘接剂混合后喷涂而成。
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