CN114030039A - 一种高强度无添加醛生态板及生产工艺 - Google Patents
一种高强度无添加醛生态板及生产工艺 Download PDFInfo
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Abstract
本发明提供的一种高强度无添加醛柜门板及生产工艺,其结构由芯板层、中板层、平衡层、饰面层组成,其中芯板层、中板层、平衡层之间采用异氰酸酯无醛胶粘接,创造性地特定保湿剂防止胶水干胶。
Description
技术领域
本发明属于板材生产制造领域,尤其涉及一种高强度无添加醛生态板及生产工艺。
背景技术
随着时代的发展,定制家居行业如雨后春笋般涌现,家居定制用主要材料为纤维板、刨花板,并非实木人造板。
实木家居柜门板主要以细木工基材为主,目前市面大多数细木工生态板制备的柜门板所使用的胶水为脲醛胶、大豆胶。例如CN202011607666.5的《一种多层复合型环保生态板》,采用传统脲醛树脂作为胶粘剂,但是存在耐水性能较差的问题,很难达到II类浸渍剥离强度要求。近些年,随着大豆胶性能的提升。例如CN201911231294.8的《一种高强度植物豆胶生态板及制作方法》,采用大豆胶作为胶黏剂,具有耐水性能优异、胶合强度高的优点,解决了脲醛树脂胶耐水性能差的问题。但是大豆胶在细木工生态板实际生产制造过程中存在一定的问题,例如1)胶水流动性不佳,大大降低了生产时布胶效率;2)大豆胶固化后容易形成胶痕,在单板层布胶后,饰面层胶痕较明显,造成成品板板面外观质量缺陷。
发明内容
针对上述的目前技术不足点,本发明提供的一种高强度无添加醛柜门板及生产工艺,其结构由芯板层、中板层、平衡层、饰面层组成,其中芯板层、中板层、平衡层之间采用异氰酸酯无醛胶粘接,创造性地特定保湿剂防止胶水干胶,具体地,该生产工艺包括如下步骤:
一、制备异氰酸酯无醛胶:
1)将水100份与羟丙基甲基纤维素2~5份混合搅拌,搅拌时间10~15min;
2)加入填料4~8份、面粉25~45份,继续混合搅拌,提升胶水黏稠度,搅拌时间10~15min;
3)加入异氰酸酯固化剂10~25份、保湿剂5~10份,继续搅拌10~15min;
二、制备高强度无添加醛生态板:
1)芯板层涂布异氰酸酯无醛胶,组坯中板层;
2)步骤1)组坯好后马上进行冷压,单位压力0.65±0.1MPa,时间50min;冷压后修补完再热压,温度125℃,单位压力0.6±0.1MPa,时间20min;
3)24h后刮腻,晾干48h以上后进行定厚砂光,养生15~30天,制得半成品;
4)步骤3)半成品涂布异氰酸酯无醛胶,涂布量1.4±0.2kg/张,组坯平衡层;
5)步骤4)组坯好后马上进行冷压,单位压力0.6±0.1MPa,时间30min;冷压后修补完再热压,温度125℃,单位压力0.6±0.1MPa,时间8min;
6)步骤5)半成品基板进行砂光、养生15~30天;
7)压贴三聚氰胺浸渍胶膜纸,温度127℃,单位压力0.7±0.1MPa,时间7min。
在一些实施方式中,所述的芯板层选用杉木、杨木、桐木芯板,厚度为1.2±0.1cm,含水率为8~10%;中板层选用桉木中板、杨木中板,厚度为2.6±0.4mm,含水率为10~18%;平衡层选用科技木皮、杨木单板,厚度为0.7±0.2mm,含水率为10~18%。
在一些实施方式中,所述的填料为碳酸钙、碳酸镁、氧化铝粉中的一种或几种混合物。
在一些实施方式中,所述的保湿剂为蓖麻油与环氧乙烷的缩合物。
本发明依据前述生产工艺制备得到的高强度无添加醛生态板。
本发明另一个目的在于提供一种异氰酸酯无醛胶,该异氰酸酯无醛胶由水、羟丙基甲基纤维素、填料、面粉、异氰酸酯固化剂、保湿剂组成。
在一些实施方式中,所述的填料为碳酸钙、碳酸镁、氧化铝粉中的一种或几种混合物。
在一些实施方式中,所述的保湿剂为蓖麻油与环氧乙烷的缩合物。
本发明的有益效果为:
1、采用异氰酸酯无醛胶制备高强度无添加醛生态板,有效提升生态板的湿强度50%,解决了使用传统脲醛树脂胶制备生态板存在的耐水性能差、胶合强度低的问题;
2、采用异氰酸酯无醛胶制备高强度无添加醛生态板,有效解决了使用大豆胶制备生态板存在的胶水流动性不佳、单板层胶水固化胶痕的问题,提升了板面外观质量、生产效率30%以上;
3、创造性地在异氰酸酯无醛胶制备时采用蓖麻油与环氧乙烷的缩合物作为保湿剂,有效提升胶水适用期,解决了胶水干胶快而造成的板材脱胶问题。
附图说明
图1为本发明提供的高强度无添加醛生态板的结构示意图。
具体实施方式
为了更清楚的展示本发明的目的和技术优点,下面将本发明的技术方案进行详细描述。显然,所描述的实施例只是发明的一部分实施例,而不是全部实施例。基于本实用信息中的实施例,本领域技术人员在没有创造性劳动的前提下所得到的实施例方式,都属于本发明保护的范围内。
实施例1
一、制备异氰酸酯无醛胶
1)将水100份与羟丙基甲基纤维素2份混合搅拌,搅拌时间15min。
2)加入碳酸钙5份、面粉40份,继续混合搅拌,提升胶水黏稠度,搅拌时间15min。
3)加入异氰酸酯固化剂15份、保湿剂蓖麻油与环氧乙烷的缩合物10份,继续搅拌15min。
二、制备高强度无添加醛生态板
1)芯板层涂布异氰酸酯无醛胶,涂布量1.4kg/张,组坯中板层。
2)步骤1)组坯好后马上进行冷压,单位压力0.65MPa,时间50min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间20min,
3)24h后刮腻,晾干48h以上后进行定厚砂光,养生20天。
4)步骤3半成品涂布异氰酸酯无醛胶,涂布量1.4kg/张,组坯平衡层。
5)步骤4组坯好后马上进行冷压,单位压力0.6MPa,时间30min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间8min。
6)步骤5半成品基板进行砂光、养生20天。
7)压贴三聚氰胺浸渍胶膜纸,温度127℃,单位压力0.7MPa,时间7min。
对比例1
一、制备异氰酸酯无醛胶
1)将水100份与羟丙基甲基纤维素2份混合搅拌,搅拌时间15min。
2)加入碳酸钙5份、面粉40份,继续混合搅拌,提升胶水黏稠度,搅拌时间15min。
3)加入异氰酸酯固化剂15份、保湿剂10份(丙三醇),继续搅拌15min。
4)胶水无法使用。
对比例2
一、制备异氰酸酯无醛胶
1)将水100份与羟丙基甲基纤维素2份混合搅拌,搅拌时间15min。
2)加入碳酸钙5份、面粉40份,继续混合搅拌,提升胶水黏稠度,搅拌时间15min。
3)加入异氰酸酯固化剂15份、保湿剂10份(丙烯酰胺),继续搅拌15min。
4)胶水无法使用。
对比例3
一、制备异氰酸酯无醛胶
1)将水100份与羟丙基甲基纤维素2份混合搅拌,搅拌时间15min。
2)加入碳酸钙5份、面粉40份,继续混合搅拌,提升胶水黏稠度,搅拌时间15min。
3)加入异氰酸酯固化剂15份,继续搅拌15min。
二、制备高强度无添加醛生态板
步骤1)芯板层涂布异氰酸酯无醛胶,涂布量1.4kg/张,组坯中板层;
步骤2)步骤1)组坯好后马上进行冷压,单位压力0.65MPa,时间50min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间20min;
步骤3)24h后刮腻,晾干48h以上后进行定厚砂光,养生20天;
步骤4)步骤3)半成品涂布异氰酸酯无醛胶,不添加保湿剂,涂布量1.4kg/张,组坯平衡层。
步骤5)步骤4)组坯好后马上进行冷压,单位压力0.6MPa,时间30min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间8min;
步骤6)步骤5)半成品基板进行砂光、养生20天;
步骤7)压贴三聚氰胺浸渍胶膜纸,温度127℃,单位压力0.7MPa,时间7min。
对比例4
步骤1)芯板层涂布大豆胶,涂胶量1.5kg/张,组坯中板层。
步骤2)步骤1)组坯好后马上进行冷压,单位压力0.65MPa,时间50min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间20min,
步骤3)24h后刮腻,晾干48h以上后进行定厚砂光,养生20天。
步骤4)步骤3)半成品涂布大豆胶,涂布量1.4kg/张,组坯平衡层。
步骤5)步骤4)组坯好后马上进行冷压,单位压力0.6MPa,时间30min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间8min。
步骤6)步骤5)半成品基板进行砂光、养生20天。
步骤7)压贴三聚氰胺浸渍胶膜纸,温度127℃,单位压力0.7MPa,时间7min。
对比例5
步骤1)芯板层涂布脲醛树脂胶,涂胶量1.5kg/张,组坯中板层。
步骤2)步骤1)组坯好后陈放3h,再进行冷压,单位压力0.65MPa,时间50min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间20min,
步骤3)24h后刮腻,晾干48h以上后进行定厚砂光,养生20天;
步骤4)步骤3)半成品涂布脲醛树脂胶,涂布量1.4±0.2kg/张,组坯平衡层;
步骤5)步骤4)组坯好后陈放2h再进行冷压,单位压力0.6MPa,时间30min;冷压好后修补再热压,温度125℃,单位压力0.6MPa,时间8min;
步骤6)步骤5)半成品基板进行砂光、养生20天;
步骤7)压贴三聚氰胺浸渍胶膜纸,温度127℃,单位压力0.7MPa,时间7min;
将实施例、对比例制备的生态板进行理化性能检测,结果如下:
检测标准:GB/T 17657(甲醛检测按照干燥器法4.59)
对比例1、2实验时发现保湿剂与异氰酸酯反应,无法正常作为胶水使用。
通过理化性能检测可以看出,异氰酸酯无醛胶有优异的耐水性能和粘接强度,检测浸渍剥离合格率100%,未出现剥离;甲醛释放量低,仅仅1mg/L,符合无添加醛生态板指标。对比例3异氰酸酯无醛胶未添加保湿剂,在生产过程中干胶块,导致板材浸渍剥离强度较差。对比例4大豆胶虽耐水性能好,浸渍剥离合格,甲醛释放量也合格,但是影响成品板面外观质量。对比例5中,脲醛树脂胶耐水性能差,浸渍剥离不合格,剥离长度大,且甲醛释放量0.4mg/L,比实施例无醛胶、大豆胶偏高。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。
Claims (8)
1.一种高强度无添加醛生态板的生产工艺,其特征在于,高强度无添加醛生态板由芯板层、中板层、平衡层、饰面层组成,该生产工艺包括如下步骤:
一、制备异氰酸酯无醛胶:
1)将水100份与羟丙基甲基纤维素2~5份混合搅拌,搅拌时间10~15min;
2)加入填料4~8份、面粉25~45份,继续混合搅拌,提升胶水黏稠度,搅拌时间10~15min;
3)加入异氰酸酯固化剂10~25份、保湿剂5~10份,继续搅拌10~15min;
二、制备高强度无添加醛生态板:
1)芯板层涂布异氰酸酯无醛胶,组坯中板层;
2)步骤1)组坯好后马上进行冷压,单位压力0.65±0.1MPa,时间50min;冷压后修补完再热压,温度125℃,单位压力0.6±0.1MPa,时间20min;
3)24h后刮腻,晾干48h以上后进行定厚砂光,养生15~30天,制得半成品;
4)步骤3)半成品涂布异氰酸酯无醛胶,涂布量1.4±0.2kg/张,组坯平衡层;
5)步骤4)组坯好后马上进行冷压,单位压力0.6±0.1MPa,时间30min;冷压后修补完再热压,温度125℃,单位压力0.6±0.1MPa,时间8min;
6)步骤5)半成品基板进行砂光、养生15~30天;
7)压贴三聚氰胺浸渍胶膜纸,温度127℃,单位压力0.7±0.1MPa,时间7min。
2.根据权利要求1所述的生产工艺,其特征在于,所述的芯板层选用杉木、杨木、桐木芯板,厚度为1.2±0.1cm,含水率为8~10%;中板层选用桉木中板、杨木中板,厚度为2.6±0.4mm,含水率为10~18%;平衡层选用科技木皮、杨木单板,厚度为0.7±0.2mm,含水率为10~18%。
3.根据权利要求1所述的生产工艺,其特征在于,所述的填料为碳酸钙、碳酸镁、氧化铝粉中的一种或几种混合物。
4.根据权利要求1所述的生产工艺,其特征在于,所述的保湿剂为蓖麻油与环氧乙烷的缩合物。
5.根据权利要求1或2或3或4的生产工艺制备得到的高强度无添加醛生态板。
6.一种异氰酸酯无醛胶,其特征在于,该异氰酸酯无醛胶由水、羟丙基甲基纤维素、填料、面粉、异氰酸酯固化剂、保湿剂组成。
7.根据权利要求6所述的异氰酸酯无醛胶,其特征在于,所述的填料为碳酸钙、碳酸镁、氧化铝粉中的一种或几种混合物。
8.根据权利要求6所述的异氰酸酯无醛胶,其特征在于,所述的保湿剂为蓖麻油与环氧乙烷的缩合物。
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