CN110903786A - 一种基于刨花板用常温复配型豆粕胶黏剂及其应用 - Google Patents
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Abstract
一种基于刨花板用常温复配型豆粕胶黏剂及其应用,各组分按质量份计如下:豆粕粉:30~150份;改性胶液:100~1000份;防腐剂:1~10份;石蜡乳:1~20份;pH调节剂:1~20份。第一步,常温条件下将豆粕粉、防腐剂、石蜡乳加入改性胶液中不断搅拌至均匀;第二步,加入pH调节剂搅拌均匀即得豆粕胶黏剂;第三步,将豆粕胶黏剂与固化剂分别施胶后制备刨花板。该胶黏剂通过常温复配工艺制备且适用于刨花板的生产,解决了传统胶黏剂潜在甲醛释放问题和生物质胶黏剂难喷涂、成型性差的问题,具有成本低、流动性好、操作简单、成型性好、无甲醛释放的优点,制备的刨花板物理力学性能满足国家标准要求。
Description
技术领域
本发明涉及木材胶黏剂应用领域,尤其涉及一种基于刨花板用常温复配型豆粕胶黏剂及其应用,具有原料成本低、流动性好、操作简单、成型性好、无甲醛释放和较好的应用性能的优点。
背景技术
中国人造板产品产量占全球人造板总产量的50%-60%,并呈现出不断增长的模式,为满足人民群众生态消费的需求,人造板产业亟需向高质量高环保的发展方式转变。刨花板是由木材或其他木质纤维素材料制成的碎料,施加胶粘剂后在高温高压作用下制成的人造板,又称碎料板。因其结构均匀、加工性能好、吸音和隔音效果好、用胶量少,防潮性好、握钉力和环保性强等优势,在家具制造、建筑工业及火车、汽车车厢制造等领域应用广泛。高质量、高环保性的刨花板是目前人造板产业领域迫切关注的焦点。
日前,为满足市场需求,少许企业利用异氰酸酯制备刨花板,生产的刨花板的物理力学性能好且具有超低甲醛释放,但也存在一些负面的影响,比如异氰酸酯胶黏剂因固化速度太快,使得刨花板表层过硬,造成镂铣崩边;因其粘结性能强,造成粘连钢带,不得不使用大量脱模剂,进而造成价格攀升;因易挥发,生产过程造成空气污染,影响人身健康等,导致了刚刚兴起的异氰酸酯胶黏剂陷入应用瓶颈,因此利用生物质资源,开发环保型胶黏剂替代石油基胶黏剂是目前木材胶黏剂领域研究的热点。
豆粕因原料充裕、价格低、富含高蛋白和可改性的活性基团等优势,引起了木材行业和科研领域的众多学者们的普遍关注。CN107236516A提出了一种基于多层胶合板用双组份豆粕胶黏剂,制备的多层胶合板满足国家标准要求;CN103897658B提出了一种纤维板用双组份豆粕基胶黏剂及其应用,解决了生物质胶黏剂在纤维板应用过程中难喷涂,储存周期短等问题;然而,豆粕胶黏剂在刨花板上的应用目前还停留在小幅面和基础研究阶段。本发明以豆粕为原料,开发了一种常温复配型豆粕胶黏剂,部分或全部替代现有胶黏剂,能够应用于大幅面刨花板的生产,突破小幅面用豆粕胶黏剂黏度大、分散性能差的应用局限,实现大幅面刨花板的连续平压生产,具有潜在市场应用价值。
发明内容
解决的技术问题:为解决刨花板用传统胶黏剂潜在甲醛释放和现有胶黏剂应用存在的技术瓶颈,以及生物质胶黏剂黏度大、难喷涂、应用局限等问题,本发明提供一种基于刨花板用常温复配型豆粕胶黏剂及其应用,将其用于刨花板的制备,所获得的刨花板的物理力学性能满足GB/T 4897-2015中P1和P2型的要求。
技术方案:一种基于刨花板用常温复配型豆粕胶黏剂,各组分按质量份计如下:豆粕粉:30~150份;改性胶液:100~1000份;防腐剂:1~10份;石蜡乳:1~20份;pH调节剂:1~20份。
上述豆粕粉为发酵豆粕、脱脂豆粕、一级豆粕、二级豆粕和三级豆粕中的至少一种。
上述改性胶液为聚乙烯醇、聚醋酸乙烯、聚乙烯亚胺、聚酰胺环氧氯丙烷、过硫酸铵和聚丙烯酰胺中的至少一种。
上述pH调节剂为柠檬酸、硫酸、盐酸、氢氧化钠、醋酸和氢氧化钾中的至少一种。
上述防腐剂为苯甲酸钠、山梨酸钾、过氧化氢、对羟基苯甲酸丙酯、双乙酸钠、硼酸、脱氢乙酸钠、聚赖氨酸和月桂酰谷氨酸钠中的至少一种。
上述豆粕胶黏剂的pH值为5.0-6.5,黏度为200~1500mPa·s。
上述一种基于刨花板用常温复配型豆粕胶黏剂的应用,第一步,常温条件下将豆粕粉30~150份、防腐剂1~10份、石蜡乳1~20份加入改性胶液100~1000份中不断搅拌至均匀;第二步,加入pH调节剂1~20份搅拌均匀即得豆粕胶黏剂;第三步,将豆粕胶黏剂与固化剂5~50份分别施胶后制备刨花板。
上述固化剂为二苯基甲烷二异氰酸酯、丙烯酸树脂、环氧树脂、二乙胺和二乙醇胺中的至少一种。
有益效果:本发明提出的一种基于刨花板用常温复配型豆粕胶黏剂,常温条件下豆粕溶胀并与改性胶液产生物理交联,使其具有一定的初粘性有利于铺装成型;高温条件下,蛋白质的活性基团与改性胶液中的大分子、木质纤维三者之间协同交联固化,使其具有较好的力学性能。此外,该豆粕胶黏剂还具有原料成本低、流动性好、操作简单、无甲醛添加和释放以及较好的应用性能等优点,易于工业化。本发明利用常温复配型豆粕胶黏剂制备的刨花板能能够满足GB/T 4897-2015中P1型和P2型刨花板的要求。
附图说明
图1为热压工艺示意图。
具体实施方式
以下实施例进一步说明本发明的内容,但不应理解为对本发明的限制。在不背离本发明精神和实质的情况下,对本发明方法、步骤或条件所作的修改和替换,均属于本发明的范围。
若未特别指明,实施例中所用的技术手段为本领域技术人员所熟知的常规手段。
实施例中所用的豆粕粉末为工业级,由河南德邻生物制品有限公司提供;
实施例中所用的改性胶液为实验室配置而成;
实施例中所述的常温为室温;
以下实施例中涉及的刨花板均是通过采用不同物料比的豆粕胶黏剂制备的,制备的刨花板的厚度为18mm,热压工艺如附图1所示,热压温度180℃,热压时间300s,施胶量(按重量表层:芯层=7:3),固化剂量(按重量表层:芯层=1:1)。
实施例1:
第一步,常温条件下将豆粕粉加入到改性胶液中,再加入防腐剂和石蜡乳,不断搅拌至均匀;
第二步,加入pH调节剂调节体系pH值,制得一定黏度的豆粕胶黏剂;
第三步,将豆粕胶黏剂和固化剂分别施胶,然后按照分层铺装、预压、热压、冷却、后处理等工艺制备刨花板;
第四步,按照GB/T 4897-2015要求检测刨花板的物理力学性能,主要检测指标为:内胶合强度、静曲强度、弹性模量、表面结合强度、2h吸水厚度膨胀率。
实施例2~6按照实施例1中的制备方法和步骤进行操作,其中各物质使用量、使用配比及参数见附表1,其压制的刨花板的物理力学性能数据见附表2。其中实施例4是较优方案。
表1
表2
Claims (8)
1.一种基于刨花板用常温复配型豆粕胶黏剂,其特征在于各组分按质量份计如下:
豆粕粉:30~150份;
改性胶液:100~1000份;
防腐剂:1~10份;
石蜡乳:1~20份;
pH调节剂:1~20份。
2.根据权利要求1所述一种基于刨花板用常温复配型豆粕胶黏剂,其特征在于所述豆粕粉为发酵豆粕、脱脂豆粕、一级豆粕、二级豆粕和三级豆粕中的至少一种。
3.根据权利要求1所述一种基于刨花板用常温复配型豆粕胶黏剂,其特征在于所述改性胶液为聚乙烯醇、聚醋酸乙烯、聚乙烯亚胺、聚酰胺环氧氯丙烷、过硫酸铵和聚丙烯酰胺中的至少一种。
4.根据权利要求1所述一种基于刨花板用常温复配型豆粕胶黏剂,其特征在于所述pH调节剂为柠檬酸、硫酸、盐酸、氢氧化钠、醋酸和氢氧化钾中的至少一种。
5.根据权利要求1所述一种基于刨花板用常温复配型豆粕胶黏剂,其特征在于所述防腐剂为苯甲酸钠、山梨酸钾、过氧化氢、对羟基苯甲酸丙酯、双乙酸钠、硼酸、脱氢乙酸钠、聚赖氨酸和月桂酰谷氨酸钠中的至少一种。
6.根据权利要求1所述一种基于刨花板用常温复配型豆粕胶黏剂,其特征在于所述豆粕胶黏剂的pH值为5.0-6.5,黏度为200~1500mPa·s。
7.权利要求1-6任一所述一种基于刨花板用常温复配型豆粕胶黏剂的应用,其特征在于:第一步,常温条件下将豆粕粉30~150份、防腐剂1~10份、石蜡乳1~20份加入改性胶液100~1000份中不断搅拌至均匀;第二步,加入pH调节剂1~20份搅拌均匀即得豆粕胶黏剂;第三步,将豆粕胶黏剂与固化剂5~50份分别施胶后制备刨花板。
8.根据权利要求7所述一种基于刨花板用常温复配型豆粕胶黏剂的应用,其特征在于所述固化剂为二苯基甲烷二异氰酸酯、丙烯酸树脂、环氧树脂、二乙胺和二乙醇胺中的至少一种。
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