CN111945482A - 一种高强阻燃瓦楞纸及其制备方法 - Google Patents
一种高强阻燃瓦楞纸及其制备方法 Download PDFInfo
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Abstract
本发明涉及瓦楞纸技术领域,具体涉及一种高强阻燃瓦楞纸及其制备方法。所述高强阻燃瓦楞纸包括由上至下依次设置的外纸层、波浪状芯层、内纸层,所述外纸层和内纸层均通过胶粘剂与波浪状芯层粘合,所述外纸层的上表面和内纸层的下表面均设置有阻燃防护层。本发明的瓦楞纸具有耐磨性、阻燃性和力学性能优越,使用寿命长,实用性强,其制备方法操作控制方便,生产效率高,适用于规模化大生产,使制得的瓦楞纸产品质量稳定。
Description
技术领域
本发明涉及瓦楞纸技术领域,具体涉及一种高强阻燃瓦楞纸及其制备方法。
背景技术
随着经济的发展和社会的进步,目前瓦楞纸板已广泛应用各种物品的包装和运输。然而,现有的瓦楞纸板用于包装物品时,在运输和搬运过程中,作为物品外包装的瓦楞纸在使用过程中强度不够,其边缘在受到较大压力时时容易被压溃,不能对所包装物品起到良好的保护作用,同时现有的瓦楞纸阻燃性能不好,使用时存在安全隐患。
发明内容
为了克服现有技术中存在的缺点和不足,本发明的目的在于提供一种高强阻燃瓦楞纸,通过由上至下依次设置外纸层、波浪状芯层、内纸层并在外纸层的上表面和内纸层的下表面均设置阻燃防护层,使制得的瓦楞纸具有强度高、阻燃性好、使用寿命长等优点,实用性强。
本发明的另一目的在于提供一种高强阻燃瓦楞纸的制备方法,该制备方法本发明瓦楞纸制备方法操作控制方便,生产效率高,生产成本低,便于规模化生产,制得的瓦楞纸产品质量稳定,具有优异的综合性能,实用性强。
本发明的目的通过下述技术方案实现:一种高强阻燃瓦楞纸,包括由上至下依次设置的外纸层、波浪状芯层、内纸层,所述外纸层和内纸层均通过胶粘剂与波浪状芯层粘合,所述外纸层的上表面和内纸层的下表面均设置有阻燃防护层。
进一步的,所述外纸层、波浪状芯层以及内纸层的制备方法包括以下步骤:
S1、按重量份计,取废旧瓦楞纸45-55份、农作物秸秆16-22份、氧化淀粉5-10份、竹木浆5-10份、水180-260份搅拌混合均匀后,进行粉碎,并过滤筛选除去杂质,得到原纸浆液;所述废旧瓦楞纸以及农作物秸秆混合前预粉碎;
S2、往原纸浆液中加入聚丙烯酰胺7-12份、线型低密度聚乙烯6-12份、填充料6-12份、ABS 4-7份、聚乙烯醇3-5份、羧甲基纤维素3-5份、聚二甲基硅氧烷2-3份,进行打浆,充分混合均匀后,静止放置60-90min,得纸浆液;
S3、将混合均匀的纸浆液利用造纸机脱水并压榨成型,然后通过干燥、卷纸、复卷、分切,根据需要分别制得外纸层、波浪状芯层以及内纸层。
进一步的,所述填充料为碳酸钙、氢氧化铝、纳米二氧化硅和滑石粉中的至少一种。
本发明的外纸层、波浪状芯层以及内纸层等瓦楞纸原纸层采用废旧瓦楞纸、农作物秸秆和氧化淀粉、竹木浆,并与线型低密度聚乙烯、ABS协同作用,可提高波浪状芯层的强度,使波浪状芯层具有良好的耐冲击强度和耐撕裂强度等,聚丙烯酰胺可增加细小纤维在纸中的留着率,填充料可均匀分散于波浪状芯层中,提升了浪状瓦楞原纸层纸张的强度、抗老化、耐磨性和耐化学性能,本发明中可充分利用废旧瓦楞纸、农作物秸秆等废弃物质,组成瓦楞纸原纸层的各原料分散均匀,使制得的瓦楞纸具有强度高,使用寿命长等优点。进一步的,所述线型低密度聚乙烯优先但不限于中原石化LLDPE7050。ABS优先但不限于宁波台化AG15A1。
进一步的,所述步骤S1中,所述氧化淀粉为小麦淀粉、玉米淀粉和木薯淀粉中的至少一种经过氧化制备而得。所述氧化淀粉原料来源广泛,可有效提高各原料的交联度,进一步提高瓦楞原纸层的强度。
进一步的,所述步骤S1中,所述农作物秸秆为小麦秸秆和玉米秸秆中的至少一种。更进一步的,所述农作物秸秆为小麦秸秆和玉米秸秆按照质量比1.2-2.2∶1组成。原料来源广泛,生产成本低,无毒无污染,使制得的瓦楞原纸层更轻量且强度高。
进一步的,所述步骤A2中,打浆转速为200-250r/min,打浆处理时间为15-30min;处理温度为80-90℃。通过对上述步骤和参数的设置,使得各原料混合均匀,各组分相容性好,有利于提高瓦楞原纸层的强度和使用寿命。
进一步的,所述阻燃防护层由阻燃防护涂料制成,所述阻燃防护涂料包括如下重量份的原料:酚醛树脂45-54份、环氧树脂6-12份、聚四氟乙烯4-8份、硅烷偶联剂4-7份、无机填料7-13份、阻燃剂9-15份、三聚氰胺4-8份、聚羧酸铵4-8份、乙基纤维素3-6份、固化剂2-6份、协效助剂3-7份、乙醇15-21份。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷、γ-(2,3-环氧丙氧)丙基三甲氧基硅和乙烯基三(β-甲氧乙氧基)硅烷中的至少一种。
本发明通过酚醛树脂、环氧树脂、聚四氟乙烯、三聚氰胺、阻燃剂和硅烷偶联剂复配,并与其它原料相互配合,制得阻燃防护涂料,所述阻燃防护涂料涂覆于瓦楞纸上形成阻燃防护层,使制得的瓦楞纸具有优异的力学性能、阻燃性和耐磨性。其中,酚醛树脂具有良好的耐酸性能、力学性能、耐高温性和耐磨性;聚羧酸铵、乙基纤维素与环氧树脂、聚四氟乙烯、聚羧酸铵、酚醛树脂乙基纤维素相配合,进一步提高了阻燃防护涂料的耐磨性和力学性能。进一步的,所述环氧树脂优选但不限于双酚A型环氧树脂E-03。所述酚醛树脂优选但不限于酚醛树脂FRJ-551。
进一步的,所述阻燃剂的制备方法包括如下步骤:
A1、按重量份计,将环氧基笼型倍半硅氧烷12-16份、2,2-双(4-羟基-3,5-二甲基苯基)丙烷25-33份、蜜胺焦磷酸盐11-15份、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷5-9份、分散剂25-32份混合均匀后,得到混合物A1;
A2、取纳米二氧化钛3-6份、氢氧化铝5-9份、钼酸铈2-4份,2-氨基丙烷4-8份加入至混合物A中,加热至55-75℃,并不断搅拌,保温60-120min后,得到混合物A2;
A3、将混合物A2用去离子水洗涤后,烘干后研磨,制得阻燃剂。
进一步的,所述无机填料为碳酸钙、滑石粉和云母粉中的至少一种。本发明通过采用上述无机填料,可以提高阻燃防护层的力学性能和耐候性,并可降低酚醛树脂和环氧树脂等的占比从而降低成本。
进一步的,每份所述分散剂由聚乙二醇和四氢呋喃按照质量比0.4-1.5∶1组成。所述分散剂与各原料具有良好的相容性,使各原料的均一分散,进而提升了阻燃防护涂料与外纸层以及内纸层的附着力。
本发明通过采用2,2-双(4-羟基-3,5-二甲基苯基)丙烷、笼型八聚(三甲基硅氧基)倍半硅氧烷、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷对蜜胺焦磷酸盐进行包覆,形成一体结构,并添加纳米二氧化钛、氢氧化铝等可提高复合材料的抗菌、抗老化性能、阻燃性能和表面性能,本发明通过采取上述步骤,对纳米二氧化钛、氢氧化铝进行表面改性,提高了其酚醛树脂和环氧树脂等原料的相容性及其在体系中的分散均一性,有助于提升其阻燃性和耐磨性。
进一步的,所述固化剂为由聚壬二酸酐、十二烯基丁二酸酐、二氨基二苯基甲烷和间苯二甲胺中的至少一种。
进一步的,每份所述协效助剂的制备方法包括如下步骤:按重量份计,六水锡酸锌5-10份、五水合四氯化锡6-12份和纳米纤维素3-5份进行混合后,加入去离子水7-13份,进行超声分散,升温至185-215℃,反应时间为12-14h,取出沉淀,用去离子水经过清洗、干燥、焙烧后,得到多孔状的协效助剂。
进一步的,所述协效助剂的制备方法中,焙烧温度为510-560℃,焙烧时间为5-8h。通过上述步骤和焙烧参数,使得纳米纤维素燃烧或碳化,并使得羟基锡酸锌转化为锡酸锌,同时避免锡酸锌因温度过高分解。
进一步的,每份所述阻燃防护涂料的制备方法包括如下步骤:
将酚醛树脂加入乙醇中,混合均匀后,加入无机填料,搅拌均匀后再加入环氧树脂、聚四氟乙烯、硅烷偶联剂、阻燃剂、乙基纤维素、聚羧酸铵、三聚氰胺、协效助剂等原料,加热至温度为55-65℃,搅拌后,加入固化剂,搅拌均匀后,得到阻燃防护涂料。
本发明通过在阻燃防护涂料中添加协效助剂可加速碳骨架的交联和成炭,从而有助于形成致密连续的炭层,使得炭层的稳定性和强度增强,可避免热量和气流穿过炭层释放,同时避免熔滴的滴落使燃烧反应蔓延,提高热降解产物的成炭率,提升了阻燃作用,并通过控制反应的温度和时间,有助于得到多孔状的锡酸锌协效助剂。
本发明的另一目的通过下述技术方案实现:一种上述高强阻燃瓦楞纸的制备方法,包括如下步骤:
(1)、取波浪状芯层,在波浪状芯层的上下表面均涂覆胶粘剂;
(2)、在波浪状芯层的上表面和下表面分别压合外纸层和内纸层,干燥、冷却后制得高强阻燃瓦楞纸初品;
(3)、取外纸层和内纸层,在外纸层和内纸层的上表面涂覆阻燃防护涂料形成阻燃防护层,得到高强阻燃瓦楞纸。
进一步的,所述步骤(2)具体为:在波浪状芯层的上表面和下表面分别贴合外纸层和内纸层,在温度为120-130℃,压力为0.5-0.7MPa条件下热压合20-40s,干燥、冷却后制得高强阻燃瓦楞纸。
本发明通过上述步骤制备瓦楞纸,操作控制方便,生产效率高,便于规模化生产,使制得的瓦楞纸各层粘合紧密,质量稳定,产品外观好,具有瓦楞纸具有强度高、阻燃性好、使用寿命长等优点。
本发明的有益效果在于:本发明通过由上至下依次设置外纸层、波浪状芯层、内纸层并在外纸层的上表面和内纸层的下表面均设置阻燃防护层,使制得的瓦楞纸具有强度高、阻燃性好、使用寿命长等优点。本发明瓦楞纸制备方法操作控制方便,生产效率高,生产成本低,便于规模化生产,制得的瓦楞纸质量稳定,具有优异的综合性能,实用性强。
具体实施方式
为了便于本领域技术人员的理解,下面结合实施例对本发明作进一步的说明,实施方式提及的内容并非对本发明的限定。
实施例1
本实施例中,一种高强阻燃瓦楞纸,包括由上至下依次设置的外纸层、波浪状芯层、内纸层,所述外纸层和内纸层均通过胶粘剂与波浪状芯层粘合,所述外纸层的上表面和内纸层的下表面均设置有阻燃防护层。
进一步的,所述外纸层、波浪状芯层以及内纸层的制备方法包括以下步骤:
S1、按重量份计,取废旧瓦楞纸50份、农作物秸秆19份、氧化淀粉7份、竹木浆8份、水220份搅拌混合均匀后,进行粉碎,并过滤筛选除去杂质,得到原纸浆液;所述废旧瓦楞纸以及农作物秸秆混合前预粉碎;
S2、往原纸浆液中加入聚丙烯酰胺9份、线型低密度聚乙烯8份、无机填料8份、ABS5份、聚乙烯醇4份、羧甲基纤维素4份、聚二甲基硅氧烷2.5份,进行打浆,充分混合均匀后,静止放置60-90min,得纸浆液;
S3、将混合均匀的纸浆液利用造纸机脱水并压榨成型,然后通过干燥、卷纸、复卷、分切,根据需要分别制得外纸层、波浪状芯层以及内纸层。
进一步的,所述步骤S1中,所述氧化淀粉为氧化小麦淀粉、氧化玉米淀粉按照质量比1∶2组成。所述农作物秸秆为小麦秸秆和玉米秸秆按照质量比1.5∶1组成。所述线型低密度聚乙烯优先但不限于中原石化LLDPE7050。ABS优先但不限于宁波台化AG15A1。
进一步的,所述步骤S2中,打浆转速为250r/min,打浆处理时间为20min;处理温度为85℃。所述填充料为氢氧化铝、纳米二氧化硅和滑石粉按照质量比1∶1∶2组成。
进一步的,所述阻燃防护层由阻燃防护涂料制成,所述阻燃防护涂料包括如下重量份的原料:酚醛树脂48份、环氧树脂8份、聚四氟乙烯6份、硅烷偶联剂5份、无机填料8份、阻燃剂11份、三聚氰胺6份、聚羧酸铵5份、乙基纤维素4份、固化剂3份、协效助剂3.5份、乙醇17份。
进一步的,所述环氧树脂为双酚A型环氧树脂E-03。所述酚醛树脂为酚醛树脂FRJ-551。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷和γ-(2,3-环氧丙氧)丙基三甲氧基硅按照质量比为2∶1组成。
进一步的,所述阻燃剂的制备方法包括如下步骤:
A1、按重量份计,将环氧基笼型倍半硅氧烷14份、2,2-双(4-羟基-3,5-二甲基苯基)丙烷29份、蜜胺焦磷酸盐14份、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷7份、分散剂27份混合均匀后,得到混合物A1;
A2、取纳米二氧化钛4份、氢氧化铝7份、钼酸铈3份,2-氨基丙烷6份加入至混合物A中,加热至65℃,并不断搅拌,保温90min后,得到混合物A2;
A3、将混合物A2用去离子水洗涤后,烘干后研磨,制得阻燃剂。
进一步的,所述无机填料为碳酸钙、滑石粉和云母粉按质量比1∶1∶1组成。每份所述分散剂由聚乙二醇和四氢呋喃按照质量比1.2∶1组成。所述固化剂为由聚壬二酸酐和二氨基二苯基甲烷按质量比1∶1.5组成。
进一步的,每份所述协效助剂的制备方法包括如下步骤:按重量份计,六水锡酸锌7份、五水合四氯化锡8份和纳米纤维素4份进行混合后,加入去离子水9份,进行超声分散,升温至195℃,反应时间为13h,取出沉淀,用去离子水经过清洗、干燥、焙烧后,得到多孔状的协效助剂。所述协效助剂的制备方法中,焙烧温度为520℃,焙烧时间为7h。
进一步的,每份所述阻燃防护涂料的制备方法包括如下步骤:
将酚醛树脂加入乙醇中,混合均匀后,加入无机填料,搅拌均匀后再加入环氧树脂、聚四氟乙烯、硅烷偶联剂、阻燃剂、乙基纤维素、聚羧酸铵、三聚氰胺、协效助剂等原料,加热至温度为60℃,搅拌15min后,加入固化剂,搅拌均匀后,得到阻燃防护涂料。
本实施例中,一种上述的高强阻燃瓦楞纸的制备方法,包括如下步骤:
(1)、取波浪状芯层,在波浪状芯层的上下表面均涂覆胶粘剂;
(2)、在波浪状芯层的上表面和下表面分别压合外纸层和内纸层,干燥、冷却后制得高强阻燃瓦楞纸初品;
(3)、取外纸层和内纸层,在外纸层和内纸层的上表面涂覆阻燃防护涂料形成阻燃防护层,得到高强阻燃瓦楞纸。
所述步骤(1)中,所述防护阻燃层的厚度为2.5mm。
所述步骤(2)具体为:在波浪状芯层的上表面和下表面分别贴合外纸层和内纸层,在温度为125℃,压力为0.6MPa条件下热压合30s,干燥、冷却后制得高强阻燃瓦楞纸。
实施例2
本实施例中,所述外纸层、波浪状芯层以及内纸层的制备方法包括以下步骤:
S1、按重量份计,取废旧瓦楞纸45份、农作物秸秆16份、氧化淀粉5份、竹木浆5份、水180份搅拌混合均匀后,进行粉碎,并过滤筛选除去杂质,得到原纸浆液;所述废旧瓦楞纸以及农作物秸秆混合前预粉碎;
S2、往原纸浆液中加入聚丙烯酰胺7份、线型低密度聚乙烯6份、填充料6份、ABS 4份、聚乙烯醇3份、羧甲基纤维素3份、聚二甲基硅氧烷2份,进行打浆,充分混合均匀后,静止放置60min,得纸浆液;
S3、将混合均匀的纸浆液利用造纸机脱水并压榨成型,然后通过干燥、卷纸、复卷、分切,根据需要分别制得外纸层、波浪状芯层以及内纸层。
进一步的,所述步骤S1中,所述氧化淀粉为氧化小麦淀粉、氧化玉米淀粉和氧化木薯淀粉按照质量比1∶1∶1组成。所述农作物秸秆为小麦秸秆和玉米秸秆按照质量比1.2∶1组成。
进一步的,所述步骤S2中,打浆转速为200r/min,打浆处理时间为30min;处理温度为80。所述填充料为碳酸钙和纳米二氧化硅按照质量比2∶1组成。
本实施例中,所述阻燃防护层由阻燃防护涂料制成,所述阻燃防护涂料包括如下重量份的原料:酚醛树脂45份、环氧树脂6份、聚四氟乙烯4份、硅烷偶联剂4份、无机填料7份、阻燃剂9份、三聚氰胺4份、聚羧酸铵4份、乙基纤维素3份、固化剂2份、协效助剂3份、乙醇15份。
进一步的,所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷。
进一步的,所述阻燃剂的制备方法包括如下步骤:
A1、按重量份计,将环氧基笼型倍半硅氧烷12份、2,2-双(4-羟基-3,5-二甲基苯基)丙烷25份、蜜胺焦磷酸盐11份、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷5份、分散剂25份混合均匀后,得到混合物A1;
A2、取纳米二氧化钛3份、氢氧化铝5份、钼酸铈2份,2-氨基丙烷4份加入至混合物A中,加热至55℃,并不断搅拌,保温120min后,得到混合物A2;
A3、将混合物A2用去离子水洗涤后,烘干后研磨,制得阻燃剂。
进一步的,所述无机填料为碳酸钙和云母粉按质量比1∶1组成。
进一步的,每份所述分散剂由聚乙二醇和四氢呋喃按照质量比0.8∶1组成。
进一步的,所述固化剂为由十二烯基丁二酸酐和二氨基二苯基甲烷按照质量比1∶2组成。
进一步的,每份所述协效助剂的制备方法包括如下步骤:按重量份计,六水锡酸锌5份、五水合四氯化锡6份和纳米纤维素3份进行混合后,加入去离子水7份,进行超声分散,升温至185℃,反应时间为14h,取出沉淀,用去离子水经过清洗、干燥、焙烧后,得到多孔状的协效助剂。所述协效助剂的制备方法中,焙烧温度为510℃,焙烧时间为8h。
本实施例中,一种上述的高强阻燃瓦楞纸的制备方法,包括如下步骤:
(1)、取波浪状芯层,在波浪状芯层的上下表面均涂覆胶粘剂;
(2)、在波浪状芯层的上表面和下表面分别压合外纸层和内纸层,干燥、冷却后制得高强阻燃瓦楞纸初品;
(3)、取外纸层和内纸层,在外纸层和内纸层的上表面涂覆阻燃防护涂料形成阻燃防护层,得到高强阻燃瓦楞纸。
所述步骤(1)中,所述防护阻燃层的厚度为2.8mm。
所述步骤(2)具体为:在波浪状芯层的上表面和下表面分别贴合外纸层和内纸层,在温度为120℃,压力为0.5MPa条件下热压合40s,干燥、冷却后制得高强阻燃瓦楞纸。
本实施例的其余内容与实施例1相同,这里不再赘述。
实施例3
本实施例中,所述外纸层、波浪状芯层以及内纸层的制备方法包括以下步骤:
S1、按重量份计,取废旧瓦楞纸55份、农作物秸秆22份、氧化淀粉10份、竹木浆10份、水260份搅拌混合均匀后,进行粉碎,并过滤筛选除去杂质,得到原纸浆液;所述废旧瓦楞纸以及农作物秸秆混合前预粉碎;
S2、往原纸浆液中加入聚丙烯酰胺12份、线型低密度聚乙烯12份、填充料12份、ABS7份、聚乙烯醇5份、羧甲基纤维素5份、聚二甲基硅氧烷3份,进行打浆,充分混合均匀后,静止放置90min,得纸浆液;
S3、将混合均匀的纸浆液利用造纸机脱水并压榨成型,然后通过干燥、卷纸、复卷、分切,根据需要分别制得外纸层、波浪状芯层以及内纸层。
进一步的,所述步骤S1中,所述氧化淀粉为小麦淀粉、玉米淀粉和木薯淀粉中的至少一种经过氧化制备而得。所述农作物秸秆为小麦秸秆和玉米秸秆按照质量比2.2∶1组成。
进一步的,所述步骤S2中,打浆转速为250r/min,打浆处理时间为15min;处理温度为90℃。所述填充料为碳酸钙、氢氧化铝、纳米二氧化硅按照质量比2∶1∶1组成。
本实施例中,所述阻燃防护层由阻燃防护涂料制成,所述阻燃防护涂料包括如下重量份的原料:酚醛树脂54份、环氧树脂12份、聚四氟乙烯8份、硅烷偶联剂7份、无机填料13份、阻燃剂15份、三聚氰胺8份、聚羧酸铵8份、乙基纤维素6份、固化剂6份、协效助剂7份、乙醇21份。
进一步的,所述阻燃剂的制备方法包括如下步骤:
A1、按重量份计,将环氧基笼型倍半硅氧烷12份、2,2-双(4-羟基-3,5-二甲基苯基)丙烷25份、蜜胺焦磷酸盐11份、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷5份、分散剂25份混合均匀后,得到混合物A1;
A2、取纳米二氧化钛3份、氢氧化铝5份、钼酸铈2份,2-氨基丙烷4份加入至混合物A中,加热至75℃,并不断搅拌,保温60min后,得到混合物A2;
A3、将混合物A2用去离子水洗涤后,烘干后研磨,制得阻燃剂。
进一步的,每份所述协效助剂的制备方法包括如下步骤:按重量份计,六水锡酸锌10份、五水合四氯化锡12份和纳米纤维素5份进行混合后,加入去离子水13份,进行超声分散,升温至215℃,反应时间为12h,取出沉淀,用去离子水经过清洗、干燥、焙烧后,得到多孔状的协效助剂。所述协效助剂的制备方法中,焙烧温度为560℃,焙烧时间为5h。
进一步的,每份所述阻燃防护涂料的制备方法包括如下步骤:
将酚醛树脂加入乙醇中,混合均匀后,加入无机填料,搅拌均匀后再加入环氧树脂、聚四氟乙烯、硅烷偶联剂、阻燃剂、乙基纤维素、聚羧酸铵、三聚氰胺、协效助剂等原料,加热至温度为65℃,搅拌10min后,加入固化剂,搅拌均匀后,得到阻燃防护涂料。
本实施例中,一种上述的高强阻燃瓦楞纸的制备方法,包括如下步骤:
(1)、取波浪状芯层,在波浪状芯层的上下表面均涂覆胶粘剂;
(2)、在波浪状芯层的上表面和下表面分别压合外纸层和内纸层,干燥、冷却后制得高强阻燃瓦楞纸初品;
(3)、取外纸层和内纸层,在外纸层和内纸层的上表面涂覆阻燃防护涂料形成阻燃防护层,得到高强阻燃瓦楞纸。
所述步骤(1)中,所述防护阻燃层的厚度为2.5mm。所述步骤(2)具体为:在波浪状芯层的上表面和下表面分别贴合外纸层和内纸层,在温度为130℃,压力为0.7MPa条件下热压合20s,干燥、冷却后制得高强阻燃瓦楞纸。
本实施例的其余内容与实施例1相同,这里不再赘述。
实施例4
本实施例中,所述外纸层、波浪状芯层以及内纸层的制备方法包括以下步骤:
S1、按重量份计,取废旧瓦楞纸47份、农作物秸秆18份、氧化淀粉6份、竹木浆7份、水210份搅拌混合均匀后,进行粉碎,并过滤筛选除去杂质,得到原纸浆液;所述废旧瓦楞纸以及农作物秸秆混合前预粉碎;
S2、往原纸浆液中加入聚丙烯酰胺9份、线型低密度聚乙烯8份、填充料6-12份、ABS5份、聚乙烯醇4份、羧甲基纤维素3.5份、聚二甲基硅氧烷2.2份,进行打浆,充分混合均匀后,静止放置80min,得纸浆液;
S3、将混合均匀的纸浆液利用造纸机脱水并压榨成型,然后通过干燥、卷纸、复卷、分切,根据需要分别制得外纸层、波浪状芯层以及内纸层。
进一步的,所述步骤S1中,所述氧化淀粉为小麦淀粉、玉米淀粉和木薯淀粉中的至少一种经过氧化制备而得。所述农作物秸秆为小麦秸秆和玉米秸秆按照质量比1.8∶1组成。
进一步的,所述步骤S2中,打浆转速为240r/min,打浆处理时间为25min;处理温度为85℃。
本实施例中,所述阻燃防护层由阻燃防护涂料制成,所述阻燃防护涂料包括如下重量份的原料:酚醛树脂49份、环氧树脂7份、聚四氟乙烯5份、硅烷偶联剂6份、无机填料8份、阻燃剂10份、三聚氰胺6份、聚羧酸铵5份、乙基纤维素4份、固化剂3份、协效助剂5份、乙醇18份。
本实施例的其余内容与实施例1相同,这里不再赘述。
对比例1
本对比例与上述实施例1的区别在于:本实施例中的外纸层、波浪状芯层以及内纸层的制备方法不加入有ABS、线型低密度聚乙烯和羧甲基纤维素,其余原料按照实施例1的比例混合。本对比例的其余内容与实施例1相同,这里不再赘述。
对比例2
本对比例与上述实施例1的区别在于:本实施例中的阻燃防护层不含有聚羧酸铵和协效助剂,其余原料按照实施例1的比例混合。本对比例的其余内容与实施例1相同,这里不再赘述。
对比例3
本对比例与上述实施例1的区别在于:将组成阻燃剂的原料与阻燃防护涂料的其他原料混合前,不将组成阻燃剂的原料混合反应。即每份所述阻燃防护涂料的制备方法包括如下步骤:
将酚醛树脂加入乙醇中,混合均匀后,加入无机填料,搅拌均匀后再加入环氧树脂、聚四氟乙烯、硅烷偶联剂、组成阻燃剂的原料、乙基纤维素、聚羧酸铵、三聚氰胺、协效助剂等原料,加热至温度为65℃,搅拌10min后,加入固化剂,搅拌均匀后,得到阻燃防护涂料。
本对比例的其余内容与实施例1相同,这里不再赘述。
采用实施例1-4和对比例1-3制备瓦楞纸,制得的瓦楞纸厚度为12mm,克重为110-120g/m2进行垂直燃烧级别、抗老化性、耐磨性等性能测试,测试结果如下所示:
耐磨性能测试方法如下:取实施例1-4和对比例1-2所制得的瓦楞纸,磨损质量损失百分比在RTEC摩擦磨损试验机上测定,磨损时间为6h。环压指数采用GBT 6546-1998测定。
其中,所述防护阻燃层的附着力测试采用“粘拉法”,具体操作如下:
第一步:将胶3M胶带粘贴在油墨印刷面,用具有恒定荷重的压辊朝一个方向滚压3次;
第二步:放置5min后,按照T型剥离强度试验方法制得长20cm、宽1.5cm的试样;
第三步:将制得的试样在剥离试验机上测试其T型剥离强度。
第四步:根据剥离强度值的大小和破坏类型来判定附着力是否合格,所需的剥离强度值越大,防护阻燃层在外纸层和内纸层上的附着力越大。
由上述内容可知,本发明实施例1-4与对比例1-3相比,综合使用性能更为优越,且实施例1-4的防护阻燃层相对于对比例3表面更为平整光滑,表面缺陷更少,制得的瓦楞纸具有优异的阻燃性能、耐磨性和抗老化性能,且环压指数高,边缘不易被压溃、使用寿命长。本发明瓦楞纸制备方法操作控制方便,生产效率高,利于规模化大生产,制得的瓦楞纸产品质量稳定,使用寿命长,可对所包装的物品起到良好的保护作用。
上述实施例为本发明较佳的实现方案,除此之外,本发明还可以其它方式实现,在不脱离本发明构思的前提下任何显而易见的替换均在本发明的保护范围之内。
Claims (10)
1.一种高强阻燃瓦楞纸,其特征在于:包括由上至下依次设置的外纸层、波浪状芯层、内纸层,所述外纸层和内纸层均通过胶粘剂与波浪状芯层粘合,所述外纸层的上表面和内纸层的下表面均设置有阻燃防护层。
2.根据权利要求1所述的一种高强阻燃瓦楞纸,其特征在于:所述外纸层、波浪状芯层以及内纸层的制备方法包括以下步骤:
S1、按重量份计,取废旧瓦楞纸45-55份、农作物秸秆16-22份、氧化淀粉5-10份、竹木浆5-10份、水180-260份搅拌混合均匀后,进行粉碎,并过滤筛选除去杂质,得到原纸浆液;所述废旧瓦楞纸以及农作物秸秆混合前预粉碎;
S2、往原纸浆液中加入聚丙烯酰胺7-12份、线型低密度聚乙烯6-12份、填充料6-12份、ABS 4-7份、聚乙烯醇3-5份、羧甲基纤维素3-5份、聚二甲基硅氧烷2-3份,进行打浆,充分混合均匀后,静止放置60-90min,得纸浆液;
S3、将混合均匀的纸浆液利用造纸机脱水并压榨成型,然后通过干燥、卷纸、复卷、分切,根据需要分别制得外纸层、波浪状芯层以及内纸层。
3.根据权利要求1所述的一种高强阻燃瓦楞纸,其特征在于:所述填充料为碳酸钙、氢氧化铝、纳米二氧化硅和滑石粉中的至少一种。
4.根据权利要求1所述的一种高强阻燃瓦楞纸,其特征在于:所述阻燃防护层由阻燃防护涂料制成,所述阻燃防护涂料包括如下重量份的原料:酚醛树脂45-54份、环氧树脂6-12份、聚四氟乙烯4-8份、硅烷偶联剂4-7份、无机填料7-13份、阻燃剂9-15份、三聚氰胺4-8份、聚羧酸铵4-8份、乙基纤维素3-6份、固化剂2-6份、协效助剂3-7份、乙醇15-21份。
5.根据权利要求3所述的一种高强阻燃瓦楞纸,其特征在于:所述硅烷偶联剂为γ-氨丙基三乙氧基硅烷、γ-(2,3-环氧丙氧)丙基三甲氧基硅和乙烯基三(β-甲氧乙氧基)硅烷中的至少一种。
6.根据权利要求3所述的一种高强阻燃瓦楞纸,其特征在于:所述阻燃剂的制备方法包括如下步骤:
A1、按重量份计,将环氧基笼型倍半硅氧烷12-16份、2,2-双(4-羟基-3,5-二甲基苯基)丙烷25-33份、蜜胺焦磷酸盐11-15份、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷5-9份、分散剂25-32份混合均匀后,得到混合物A1;
A2、取纳米二氧化钛3-6份、氢氧化铝5-9份、钼酸铈2-4份,2-氨基丙烷4-8份加入至混合物A中,加热至55-75℃,并不断搅拌,保温60-120min后,得到混合物A2;
A3、将混合物A2用去离子水洗涤后,烘干后研磨,制得阻燃剂。
7.根据权利要求3所述的一种高强阻燃瓦楞纸,其特征在于:所述无机填料为碳酸钙、滑石粉和云母粉中的至少一种。
8.根据权利要求3所述的一种高强阻燃瓦楞纸,其特征在于:所述固化剂为聚壬二酸酐、十二烯基丁二酸酐、二氨基二苯基甲烷和间苯二甲胺中的至少一种。
9.根据权利要求4所述的一种高强阻燃瓦楞纸,其特征在于:所述阻燃防护涂料的制备方法包括如下步骤:
将酚醛树脂加入乙醇中,混合均匀后,加入无机填料,搅拌均匀后再加入环氧树脂、聚四氟乙烯、硅烷偶联剂、阻燃剂、乙基纤维素、聚羧酸铵、三聚氰胺、协效助剂,加热搅拌后,加入固化剂,搅拌均匀后,得到阻燃防护涂料。
10.一种如权利要求1-9任意一项所述的高强阻燃瓦楞纸的制备方法,其特征在于:包括如下步骤:
(1)、取波浪状芯层,在波浪状芯层的上下表面均涂覆胶粘剂;
(2)、在波浪状芯层的上表面和下表面分别压合外纸层和内纸层,干燥、冷却后制得高强阻燃瓦楞纸初品;
(3)、取外纸层和内纸层,在外纸层和内纸层的上表面涂覆阻燃防护涂料形成阻燃防护层,得到高强阻燃瓦楞纸。
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CN114000371A (zh) * | 2021-10-27 | 2022-02-01 | 苏州宏瑞纸业有限公司 | 一种环保纸及其制备方法 |
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