CN107217547A - 一种可再生的防水瓦楞纸板的制备方法 - Google Patents
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Abstract
本发明提供了一种可再生的防水瓦楞纸板的制备方法,先取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,将所得混合干粉加至硫酸溶液中,加热保温,冷却、打浆,得到浆液A;再将羧甲基纤维素、柠檬酸钠、海藻酸钠、液体石蜡加至水中,加热保温,冷却得到浆液B;然后将浆液A和浆液B混合,加入聚乳酸、聚乙烯醇、植物淀粉、硅藻土,搅拌混合后加入将氢化松香酯、乳化剂,搅拌混合后导入挤压机挤出成型,烘干,即得。本发明将秸秆、水葫芦、烟叶、蔗渣、稻麦草制成渣浆,加入植物淀粉、聚乳酸等可降解原料,制成可再生的防水瓦楞板,该防水瓦楞板抗压强度较大、防潮能力强。
Description
技术领域
本发明属于包装材料技术领域,具体涉及一种可再生的防水瓦楞纸板及其制备方法。
背景技术
瓦楞纸板是一个多层的黏合体,它最少由一层波浪形芯纸夹层及一层纸板构成。它有很高的机械强度,能抵受搬运过程中的碰撞和摔跌。瓦楞纸板的瓦楞波纹好像一个个连接的拱形门,相互并列成一排,相互支撑,形成三角结构体,具有较好的机械强度,从平面上也能承受一定的压力,并富于弹性,缓冲作用好;它可根据需要制成各种形状大小的衬垫或容器,比塑料缓冲材料要简便、快捷;受温度影响小,遮光性好,受光照不变质,一般受湿度影响也较小,但不宜在湿度较大的环境中长期使用,这会影响其强度。
防水瓦楞纸板可用来包装冷冻或新鲜鱼水产品, 或用作需预冷的蔬菜箱、水产加工箱等。以往的防水瓦楞纸板主要采用2种方法加工:一是对瓦楞纸板浸蜡,或涂蜡;二是在制成瓦楞纸板前的原纸表面涂上蜡乳液或溶蜡,或者与塑料薄膜、金属箔复合,再制成瓦楞纸板。这些瓦楞纸板虽耐水性好,却很难回收再生。
发明内容
解决的技术问题:本发明的目的是提供一种可再生的防水瓦楞纸板的制备方法。
技术方案:一种可再生的防水瓦楞纸板的制备方法,包括以下步骤:
步骤1,取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,得到混合干粉;
步骤2,将步骤1所得混合干粉加至2-3倍重量的硫酸溶液中,加热至60-80℃,保温2-3h,冷却、打浆,得到浆液A;
步骤3,以重量份计,将羧甲基纤维素4-8份、柠檬酸钠0.5-1.2份、海藻酸钠2-5份、液体石蜡0.3-0.7份加至水10份中,加热至50-80℃,保温2-3h,冷却,得到浆液B;
步骤4,以重量份计,将步骤2所得浆液A 10份和步骤3所得浆液B 3-6份混合,加入聚乳酸0.8-1.8份、聚乙烯醇0.5-1.2份、植物淀粉1-4份、硅藻土0.5-1份,搅拌混合,得到混合浆液;
步骤5,以重量份计,将氢化松香酯2-4份、乳化剂0.8-1.5份加至步骤4所得混合浆液中,搅拌混合后导入挤压机挤出成型,烘干,即得。
优选地,步骤1中混合干粉的粒度在40-60目。
优选地,步骤2中硫酸溶液的浓度为20-30v/v%。
优选地,所述植物淀粉为玉米淀粉或甘薯淀粉。
优选地,所述硅藻土的粒度在120目。
优选地,所述乳化剂为非离子型表面活性剂AEO3或AEO7。
有益效果:本发明将秸秆、水葫芦、烟叶、蔗渣、稻麦草制成渣浆,加入植物淀粉、聚乳酸等可降解原料,制成可再生的防水瓦楞板,该防水瓦楞板抗压强度较大、防潮能力强。
具体实施方式
实施例1
一种可再生的防水瓦楞纸板的制备方法,包括以下步骤:
步骤1,取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,得到混合干粉;
步骤2,将步骤1所得混合干粉加至2倍重量的硫酸溶液中,加热至60℃,保温3h,冷却、打浆,得到浆液A;
步骤3,以重量份计,将羧甲基纤维素4份、柠檬酸钠0.5份、海藻酸钠2份、液体石蜡0.3份加至水10份中,加热至50℃,保温3h,冷却,得到浆液B;
步骤4,以重量份计,将步骤2所得浆液A 10份和步骤3所得浆液B 3份混合,加入聚乳酸0.8份、聚乙烯醇0.5份、植物淀粉1份、硅藻土0.5份,搅拌混合,得到混合浆液;
步骤5,以重量份计,将氢化松香酯2份、乳化剂0.8份加至步骤4所得混合浆液中,搅拌混合后导入挤压机挤出成型,烘干,即得。
其中,步骤1中混合干粉的粒度在40-60目;步骤2中硫酸溶液的浓度为20v/v%;所述植物淀粉为玉米淀粉;所述硅藻土的粒度在120目;所述乳化剂为非离子型表面活性剂AEO3。
所得瓦楞纸板横向平均拉伸强度为157MPa,纵向平均拉伸强度为246MPa,横向断裂伸长率126MPa,纵向断裂伸长率为120Mpa。
实施例2
一种可再生的防水瓦楞纸板的制备方法,包括以下步骤:
步骤1,取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,得到混合干粉;
步骤2,将步骤1所得混合干粉加至2倍重量的硫酸溶液中,加热至70℃,保温3h,冷却、打浆,得到浆液A;
步骤3,以重量份计,将羧甲基纤维素5份、柠檬酸钠0.7份、海藻酸钠3份、液体石蜡0.5份加至水10份中,加热至60℃,保温3h,冷却,得到浆液B;
步骤4,以重量份计,将步骤2所得浆液A 10份和步骤3所得浆液B 4份混合,加入聚乳酸1.2份、聚乙烯醇0.8份、植物淀粉2份、硅藻土0.7份,搅拌混合,得到混合浆液;
步骤5,以重量份计,将氢化松香酯3份、乳化剂1.1份加至步骤4所得混合浆液中,搅拌混合后导入挤压机挤出成型,烘干,即得。
其中,步骤1中混合干粉的粒度在40-60目;步骤2中硫酸溶液的浓度为25v/v%;所述植物淀粉为玉米淀粉;所述硅藻土的粒度在120目;所述乳化剂为非离子型表面活性剂AEO3。
所得瓦楞纸板横向平均拉伸强度为160MPa,纵向平均拉伸强度为244MPa,横向断裂伸长率117MPa,纵向断裂伸长率为124Mpa。
实施例3
一种可再生的防水瓦楞纸板的制备方法,包括以下步骤:
步骤1,取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,得到混合干粉;
步骤2,将步骤1所得混合干粉加至2倍重量的硫酸溶液中,加热至60℃,保温3h,冷却、打浆,得到浆液A;
步骤3,以重量份计,将羧甲基纤维素7份、柠檬酸钠0.9份、海藻酸钠4份、液体石蜡0.6份加至水10份中,加热至70℃,保温3h,冷却,得到浆液B;
步骤4,以重量份计,将步骤2所得浆液A 10份和步骤3所得浆液B 5份混合,加入聚乳酸1.4份、聚乙烯醇1份、植物淀粉3份、硅藻土0.8份,搅拌混合,得到混合浆液;
步骤5,以重量份计,将氢化松香酯3份、乳化剂1.3份加至步骤4所得混合浆液中,搅拌混合后导入挤压机挤出成型,烘干,即得。
其中,步骤1中混合干粉的粒度在40-60目;步骤2中硫酸溶液的浓度为25v/v%;所述植物淀粉为甘薯淀粉;所述硅藻土的粒度在120目;所述乳化剂为非离子型表面活性剂AEO7。
所得瓦楞纸板横向平均拉伸强度为155MPa,纵向平均拉伸强度为237MPa,横向断裂伸长率121MPa,纵向断裂伸长率为126Mpa。
实施例4
一种可再生的防水瓦楞纸板的制备方法,包括以下步骤:
步骤1,取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,得到混合干粉;
步骤2,将步骤1所得混合干粉加至3倍重量的硫酸溶液中,加热至80℃,保温3h,冷却、打浆,得到浆液A;
步骤3,以重量份计,将羧甲基纤维素8份、柠檬酸钠1.2份、海藻酸钠5份、液体石蜡0.7份加至水10份中,加热至80℃,保温2h,冷却,得到浆液B;
步骤4,以重量份计,将步骤2所得浆液A 10份和步骤3所得浆液B 6份混合,加入聚乳酸1.8份、聚乙烯醇1.2份、植物淀粉4份、硅藻土1份,搅拌混合,得到混合浆液;
步骤5,以重量份计,将氢化松香酯4份、乳化剂1.5份加至步骤4所得混合浆液中,搅拌混合后导入挤压机挤出成型,烘干,即得。
其中,步骤1中混合干粉的粒度在40-60目;步骤2中硫酸溶液的浓度为30v/v%;所述植物淀粉为玉米淀粉;所述硅藻土的粒度在120目;所述乳化剂为非离子型表面活性剂AEO7。
所得瓦楞纸板横向平均拉伸强度为152MPa,纵向平均拉伸强度为250MPa,横向断裂伸长率124MPa,纵向断裂伸长率为123Mpa。
Claims (6)
1.一种可再生的防水瓦楞纸板的制备方法,其特征在于:包括以下步骤:
步骤1,取等重量的秸秆、水葫芦、烟叶、蔗渣、稻麦草混合,晒干、破碎,得到混合干粉;
步骤2,将步骤1所得混合干粉加至2-3倍重量的硫酸溶液中,加热至60-80℃,保温2-3h,冷却、打浆,得到浆液A;
步骤3,以重量份计,将羧甲基纤维素4-8份、柠檬酸钠0.5-1.2份、海藻酸钠2-5份、液体石蜡0.3-0.7份加至水10份中,加热至50-80℃,保温2-3h,冷却,得到浆液B;
步骤4,以重量份计,将步骤2所得浆液A 10份和步骤3所得浆液B 3-6份混合,加入聚乳酸0.8-1.8份、聚乙烯醇0.5-1.2份、植物淀粉1-4份、硅藻土0.5-1份,搅拌混合,得到混合浆液;
步骤5,以重量份计,将氢化松香酯2-4份、乳化剂0.8-1.5份加至步骤4所得混合浆液中,搅拌混合后导入挤压机挤出成型,烘干,即得。
2.根据权利要求1所述的可再生的防水瓦楞纸板的制备方法,其特征在于:步骤1中混合干粉的粒度在40-60目。
3.根据权利要求1所述的可再生的防水瓦楞纸板的制备方法,其特征在于:步骤2中硫酸溶液的浓度为20-30v/v%。
4.根据权利要求1所述的可再生的防水瓦楞纸板的制备方法,其特征在于:所述植物淀粉为玉米淀粉或甘薯淀粉。
5.根据权利要求1所述的可再生的防水瓦楞纸板的制备方法,其特征在于:所述硅藻土的粒度在120目。
6.根据权利要求1所述的可再生的防水瓦楞纸板的制备方法,其特征在于:所述乳化剂为非离子型表面活性剂AEO3或AEO7。
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