CN108385848A - 一种聚氨酯芯材的夹芯板表面处理方法 - Google Patents
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Abstract
本发明涉及建筑材料技术领域,公开了一种聚氨酯芯材的夹芯板表面处理方法,采用物理以及化学原理对聚氨酯芯材进行处理,得到的芯材更容易与面板具有很好的结合性,首先在芯材表面开设合理密度和尺寸的槽和孔,并在槽中填充高黏附剂,不仅能够提高聚氨酯结构的力学稳定性,与孔洞作用产生的缓冲空间还能够很好的支撑与面板的连接作用,降低由于加工温度和外力造成的残余应力,最后使用油性处理剂处理,固化后得到的芯材能够抵抗化学腐蚀的渗透破坏,本发明的处理方法将夹芯板的使用寿命整体提高了5‑8年。
Description
技术领域
本发明属于建筑材料技术领域,具体涉及一种聚氨酯芯材的夹芯板表面处理方法。
背景技术
夹芯板产品是由两层成型金属面板(或其他材料面板)和直接在面板中间发泡、熟化成型的高分子隔热内芯组成。这些夹芯板成品便于安装、轻质、高效。填充系统使用的也是闭泡分子结构,可以杜绝水汽的凝结。外层钢板的成型充分考虑了结构和强度要求,并兼顾美观,内面层成型为平板以适应各种需要。夹芯板用于大型工业厂房,仓库,体育馆,超市,医院,冷库,活动房,建筑物加层,洁净车间以及需保温隔热防火的场所。夹芯板外形美观,色泽艳丽,整体效果好,它集承重,保温,防火,防水于一体,且无需二次装修,是一种用途广泛,特别是在 对于建筑工地的临时设施如办公室,仓库,围墙等,更体现了现代施工工地的文明施工 ,尤其在快速安装投入使用方面,在可装可拆、材料的周转复用指数方面,都有明显优势,较大幅度降低建筑工地临时设施费用,将是不可缺少的新型轻质建筑材料。
因为聚氨酯弹性体力学性能范围广、减震抗疲劳性能好,易于施工,所以被广泛地应用于建造和修复一些大型结构。聚氨酯夹芯板是复合夹芯板的一种。聚氨酯夹芯板的上下面板材料通常是由金属或者复合纤维制成,芯子则为聚氨酯基聚合物,其中聚氨酯基聚合物包括聚氨酯泡沫和聚氨酯弹性体两种类型聚氨酯材料。聚氨酯芯材具有质轻,施工性好,成本低等优点,但在与复合材料面板结合时,容易产生温度残余应力和化学腐蚀,降低夹芯板的使用寿命。
发明内容
本发明的目的是针对现有的问题,提供了一种聚氨酯芯材的夹芯板表面处理方法,采用物理以及化学原理对聚氨酯芯材进行处理,得到的芯材更容易与面板具有很好的结合性。
本发明是通过以下技术方案实现的:
一种聚氨酯芯材的夹芯板表面处理方法,包括以下步骤:
(1)将聚氨酯芯材进行开槽打孔,槽间距为18-20厘米,槽宽1.5-2.0厘米,孔深3-4毫米,孔径大小在2-3毫米之间,孔间距为8-10厘米,向槽中填充高黏附剂,该粘附剂按照重量份计由以下成分制成:E-42环氧树脂60-70份、210松香改性树脂35-40份、丙酮20-25份、三乙胺14-18份、轻质氧化镁6-8份、邻苯二甲酸二甲酯3-5份、醋酸乙酯80-90份;
(2)将步骤(2)中填充黏附剂后的芯材在40-50℃下烘干4-5小时,然后在自然条件下放置14-16小时,得到的芯材使用油性处理剂均匀涂覆0.2-0.4毫米,然后放置在电加热器上加热至70-80℃,放入电热真空干燥箱中抽真空干燥3-4小时,然后进行保温固化,固化时长为20-24小时,降温至20-25℃后放置12-15小时取出;
(3)经过步骤(1)和步骤(2)处理后的芯材即可使用与面板进行组合,面板厚度控制在为聚氨酯芯材厚度的18-20%范围。
作为对上述方案的进一步描述,步骤(1)中所述芯材的边缘0-20厘米范围内不进行开槽打孔。
作为对上述方案的进一步描述,步骤(2)所述油性处理剂的制备方法为:
(1)按照重量份称取:蓖麻油18-20份、油酸甲酯11-13份、羧甲基纤维素钠1.9-2.0份、聚乙烯甲基醚1.2-1.4份、二甲基硅氧烷0.8-1.0份、马来酸酐0.4-0.6份;
(2)将蓖麻油和油酸甲酯混合加热,同时使用搅拌器搅拌使之均匀受热至80-90℃,在搅拌下将剩余原料缓慢加入到油脂混合液中,继续搅拌2-3小时,在温度降低至35-40℃时使用。
作为对上述方案的进一步描述,步骤(2)所述电热真空干燥箱中温度控制在50-60℃。
作为对上述方案的进一步描述,步骤(3)所述面板是金属或非金属材质。
本发明相比现有技术具有以下优点:为了解决现有的聚氨酯芯材在与复合材料面板结合时,容易产生温度残余应力和化学腐蚀,降低夹芯板的使用寿命的问题,本发明提供了一种聚氨酯芯材的夹芯板表面处理方法,采用物理以及化学原理对聚氨酯芯材进行处理,得到的芯材更容易与面板具有很好的结合性,首先在芯材表面开设合理密度和尺寸的槽和孔,并在槽中填充高黏附剂,不仅能够提高聚氨酯结构的力学稳定性,与孔洞作用产生的缓冲空间还能够很好的支撑与面板的连接作用,降低由于加工温度和外力造成的残余应力,最后使用油性处理剂处理,固化后得到的芯材能够抵抗化学腐蚀的渗透破坏,本发明的处理方法将夹芯板的使用寿命整体提高了5-8年。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
实施例1
一种聚氨酯芯材的夹芯板表面处理方法,包括以下步骤:
(1)将聚氨酯芯材进行开槽打孔,槽间距为18厘米,槽宽1.5厘米,孔深3毫米,孔径大小在2-3毫米之间,孔间距为8厘米,向槽中填充高黏附剂,该粘附剂按照重量份计由以下成分制成:E-42环氧树脂60份、210松香改性树脂35份、丙酮20份、三乙胺14份、轻质氧化镁6份、邻苯二甲酸二甲酯3份、醋酸乙酯80份;
(2)将步骤(2)中填充黏附剂后的芯材在40℃下烘干4小时,然后在自然条件下放置14小时,得到的芯材使用油性处理剂均匀涂覆0.2毫米,然后放置在电加热器上加热至70℃,放入电热真空干燥箱中抽真空干燥3小时,然后进行保温固化,固化时长为20小时,降温至20℃后放置12小时取出;
(3)经过步骤(1)和步骤(2)处理后的芯材即可使用与面板进行组合,面板厚度控制在为聚氨酯芯材厚度的18-20%范围。
作为对上述方案的进一步描述,步骤(1)中所述芯材的边缘0-20厘米范围内不进行开槽打孔。
作为对上述方案的进一步描述,步骤(2)所述油性处理剂的制备方法为:
(1)按照重量份称取:蓖麻油18份、油酸甲酯11份、羧甲基纤维素钠1.9份、聚乙烯甲基醚1.2份、二甲基硅氧烷0.8份、马来酸酐0.4份;
(2)将蓖麻油和油酸甲酯混合加热,同时使用搅拌器搅拌使之均匀受热至80℃,在搅拌下将剩余原料缓慢加入到油脂混合液中,继续搅拌2小时,在温度降低至35℃时使用。
作为对上述方案的进一步描述,步骤(2)所述电热真空干燥箱中温度控制在50℃。
作为对上述方案的进一步描述,步骤(3)所述面板是金属或非金属材质。
实施例2
一种聚氨酯芯材的夹芯板表面处理方法,包括以下步骤:
(1)将聚氨酯芯材进行开槽打孔,槽间距为19厘米,槽宽1.8厘米,孔深3.5毫米,孔径大小在2-3毫米之间,孔间距为9厘米,向槽中填充高黏附剂,该粘附剂按照重量份计由以下成分制成:E-42环氧树脂65份、210松香改性树脂38份、丙酮22份、三乙胺16份、轻质氧化镁7份、邻苯二甲酸二甲酯4份、醋酸乙酯85份;
(2)将步骤(2)中填充黏附剂后的芯材在45℃下烘干4.5小时,然后在自然条件下放置15小时,得到的芯材使用油性处理剂均匀涂覆0.3毫米,然后放置在电加热器上加热至75℃,放入电热真空干燥箱中抽真空干燥3.5小时,然后进行保温固化,固化时长为22小时,降温至23℃后放置13小时取出;
(3)经过步骤(1)和步骤(2)处理后的芯材即可使用与面板进行组合,面板厚度控制在为聚氨酯芯材厚度的18-20%范围。
作为对上述方案的进一步描述,步骤(1)中所述芯材的边缘0-20厘米范围内不进行开槽打孔。
作为对上述方案的进一步描述,步骤(2)所述油性处理剂的制备方法为:
(1)按照重量份称取:蓖麻油19份、油酸甲酯12份、羧甲基纤维素钠1.95份、聚乙烯甲基醚1.3份、二甲基硅氧烷0.9份、马来酸酐0.5份;
(2)将蓖麻油和油酸甲酯混合加热,同时使用搅拌器搅拌使之均匀受热至85℃,在搅拌下将剩余原料缓慢加入到油脂混合液中,继续搅拌2.5小时,在温度降低至38℃时使用。
作为对上述方案的进一步描述,步骤(2)所述电热真空干燥箱中温度控制在55℃。
作为对上述方案的进一步描述,步骤(3)所述面板是金属或非金属材质。
实施例3
一种聚氨酯芯材的夹芯板表面处理方法,包括以下步骤:
(1)将聚氨酯芯材进行开槽打孔,槽间距为20厘米,槽宽2.0厘米,孔深4毫米,孔径大小在2-3毫米之间,孔间距为10厘米,向槽中填充高黏附剂,该粘附剂按照重量份计由以下成分制成:E-42环氧树脂70份、210松香改性树脂40份、丙酮25份、三乙胺18份、轻质氧化镁8份、邻苯二甲酸二甲酯5份、醋酸乙酯90份;
(2)将步骤(2)中填充黏附剂后的芯材在50℃下烘干5小时,然后在自然条件下放置16小时,得到的芯材使用油性处理剂均匀涂覆0.4毫米,然后放置在电加热器上加热至80℃,放入电热真空干燥箱中抽真空干燥4小时,然后进行保温固化,固化时长为24小时,降温至25℃后放置15小时取出;
(3)经过步骤(1)和步骤(2)处理后的芯材即可使用与面板进行组合,面板厚度控制在为聚氨酯芯材厚度的18-20%范围。
作为对上述方案的进一步描述,步骤(1)中所述芯材的边缘0-20厘米范围内不进行开槽打孔。
作为对上述方案的进一步描述,步骤(2)所述油性处理剂的制备方法为:
(1)按照重量份称取:蓖麻油20份、油酸甲酯13份、羧甲基纤维素钠2.0份、聚乙烯甲基醚1.4份、二甲基硅氧烷1.0份、马来酸酐0.6份;
(2)将蓖麻油和油酸甲酯混合加热,同时使用搅拌器搅拌使之均匀受热至90℃,在搅拌下将剩余原料缓慢加入到油脂混合液中,继续搅拌3小时,在温度降低至40℃时使用。
作为对上述方案的进一步描述,步骤(2)所述电热真空干燥箱中温度控制在60℃。
作为对上述方案的进一步描述,步骤(3)所述面板是金属或非金属材质。
对比例1
与实施例1的区别仅在于,省略步骤(1)中对芯材打孔开槽的处理,其余保持一致。
对比例2
与实施例2的区别仅在于,省略步骤(1)中高粘附剂的使用,使用普通的粘附剂代替,其余保持一致。
对比例3
与实施例3的区别仅在于,省略步骤(2)中油性处理剂的使用,其余保持一致。
对比实验
分别使用实施例1-3和对比例1-3的方法加工处理聚氨酯芯材,同时以不作处理的聚氨酯芯材作为对照组,采用相同的金属面板进行组合,保持无关变量一致,对各组制备得到的夹芯板进行性能测试,测试中保持无关变量一致,测试标准均采用现行的国家通用标准,测试数据的处理采用科学计数原则,结果如下表所示:
项目 | 压缩强度(MPa) | 拉伸强度(MPa) | 导热系数(W/(m·K)) | 剪切强度(MPa) |
实施例1 | 18.6 | 27.5 | 0.021 | 15.8 |
实施例2 | 18.9 | 30.5 | 0.020 | 16.3 |
实施例3 | 18.7 | 29.6 | 0.020 | 16.1 |
对比例1 | 14.6 | 18.7 | 0.038 | 11.0 |
对比例2 | 15.3 | 20.6 | 0.035 | 11.5 |
对比例3 | 13.8 | 17.6 | 0.042 | 9.8 |
对照组 | 11.1 | 15.2 | 0.059 | 6.7 |
由此可见:本发明处理制备得到的夹芯板力学强度优异,导热系数低,保温性能好,与金属有极好的粘结性能,能够承受的耐水及耐腐蚀性能好,成型工艺简单方便。
Claims (5)
1.一种聚氨酯芯材的夹芯板表面处理方法,其特征在于,包括以下步骤:
(1)将聚氨酯芯材进行开槽打孔,槽间距为18-20厘米,槽宽1.5-2.0厘米,孔深3-4毫米,孔径大小在2-3毫米之间,孔间距为8-10厘米,向槽中填充高黏附剂,该粘附剂按照重量份计由以下成分制成:E-42环氧树脂60-70份、210松香改性树脂35-40份、丙酮20-25份、三乙胺14-18份、轻质氧化镁6-8份、邻苯二甲酸二甲酯3-5份、醋酸乙酯80-90份;
(2)将步骤(2)中填充黏附剂后的芯材在40-50℃下烘干4-5小时,然后在自然条件下放置14-16小时,得到的芯材使用油性处理剂均匀涂覆0.2-0.4毫米,然后放置在电加热器上加热至70-80℃,放入电热真空干燥箱中抽真空干燥3-4小时,然后进行保温固化,固化时长为20-24小时,降温至20-25℃后放置12-15小时取出;
(3)经过步骤(1)和步骤(2)处理后的芯材即可使用与面板进行组合,面板厚度控制在为聚氨酯芯材厚度的18-20%范围。
2.如权利要求1所述一种聚氨酯芯材的夹芯板表面处理方法,其特征在于,步骤(1)中所述芯材的边缘0-20厘米范围内不进行开槽打孔。
3.如权利要求1所述一种聚氨酯芯材的夹芯板表面处理方法,其特征在于,步骤(2)所述油性处理剂的制备方法为:
(1)按照重量份称取:蓖麻油18-20份、油酸甲酯11-13份、羧甲基纤维素钠1.9-2.0份、聚乙烯甲基醚1.2-1.4份、二甲基硅氧烷0.8-1.0份、马来酸酐0.4-0.6份;
(2)将蓖麻油和油酸甲酯混合加热,同时使用搅拌器搅拌使之均匀受热至80-90℃,在搅拌下将剩余原料缓慢加入到油脂混合液中,继续搅拌2-3小时,在温度降低至35-40℃时使用。
4.如权利要求1所述一种聚氨酯芯材的夹芯板表面处理方法,其特征在于,步骤(2)所述电热真空干燥箱中温度控制在50-60℃。
5.如权利要求1所述一种聚氨酯芯材的夹芯板表面处理方法,其特征在于,步骤(3)所述面板是金属或非金属材质。
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