CN112223132B - 一种超宽幅砂光研磨带的制备方法 - Google Patents

一种超宽幅砂光研磨带的制备方法 Download PDF

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CN112223132B
CN112223132B CN202011013606.0A CN202011013606A CN112223132B CN 112223132 B CN112223132 B CN 112223132B CN 202011013606 A CN202011013606 A CN 202011013606A CN 112223132 B CN112223132 B CN 112223132B
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王荣生
王鹏
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Jiangsu Fengmang Compound Material Science&tech Group Co ltd
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Abstract

本发明公开了一种超宽幅砂光研磨带的制备方法,包括:基材开卷—印制商标—涂底胶—静电植砂—预干燥—涂复胶—烘干—收卷—隧道式固化炉—揉曲整理—切边收卷—检验入库,其中:(1)上底胶,配置底胶胶粘剂用对辊涂覆法涂覆在基材表面,对基材进行烘干,底胶涂层厚0.1‑0.6mm;(2)静电植砂,将磨料搅拌均匀,用静电植砂法植入底胶层表面,在80‑85℃下,预干燥处理20‑25min;(3)上复胶,在植砂的底胶上再涂覆一层复胶胶粘剂完成复胶工序,在80‑120℃下烘干;(4)隧道式固化,将收卷后的基材固定好,放置到小车中,推入隧道式固化炉的隧道内固化,打开炉门取出;该制备方法简单易行,制备出研磨带的砂面均匀,磨削性能好、加工精度高,使用寿命长。

Description

一种超宽幅砂光研磨带的制备方法
技术领域
本发明涉及一种超宽幅砂光研磨带的制备方法。
背景技术
现代制造业中,工件表面处理技术和工艺要求越来越高,因而对被行业称之为“现代工业牙齿”的涂附磨具产品不断提出新的要求。主要表现为产品的专业化程度愈来愈高,加工的难度愈来愈大,加工的精度愈来愈细,因此磨具产品的高科技含量也不断提升,要求产品不断适应日益发展的现代制造业的需求,于是开发与创新成为每个涂附磨具产品生产厂家谋划发展的重中之重。
现有企业所生产的砂布门幅通常都是在1400mm以下,在实际使用中还需要裁剪掉两侧各约6-8cm荷叶边(指平整度差且植砂不均匀的部分),普通砂布最大可使用门幅宽度只能在1280mm以下。随着环带研磨抛光(砂光)技术的快速发展,大面积或超长度平面材料(如钢板等)一次性砂光工艺进入制造业,广泛应用于各种工件的表面砂光、去氧化皮、抛光、拉丝、去毛刺等加工。于是超宽幅研磨砂带呈现巨大市场需求。超宽幅砂带是指应用门幅在1600mm至2100 mm的环形研磨砂带。用户大多不选择“纵向拼接”方法制作,一是拼接后的砂带纵向力学性能(伸长力)会出现不均衡现象,影响研磨效果,尤其是精密度较高的工件。二是增加了较多材料、工时与能耗成本。
在国外,砂带磨削已成为较为完整且自成体系的新加工技术。其加工对象和应用领域日趋广泛,几乎能加工所有的工程材料和机械设备。因其具有加工效率高、加工精度细、应用范围广、适应能力强、使用成本低、操作安全方便等特点而倍受用户青睐。其中德、日、美、韩、意等国家的产品一直占据国际市场的主导地位,他们不断应用新材料,研究新技术,使用新方法,所推出的产品专业化程度高、性能全面、规格品种繁,尤其在高档产品方面始终走在世界的前列。大面积的金属板、装饰板、洁面板等需要一次磨削完成,才能避免因诸多因素造成的表面粗糙度不均匀的现象,因此门幅1600mm-1900mm的超宽幅研磨砂带就成了发达国家向市场最新推出的高端产品。
目前国内虽有少数企业着手研发超宽幅研磨带产品,但是普遍存在表面平整度低、砂面不均匀、加工精度不高、磨削寿命较短等缺陷。因此尽快开发高质量、高性能、长寿命的超宽幅研磨带系列产品,替代进口、参与国际市场竞争,成了行业面临的迫切任务。
发明内容
本发明所要解决的技术问题是,针对以上现有技术存在的缺点,提出一种超宽幅砂光研磨带的制备方法,该制备方法简单易行,制备出研磨带的砂面均匀,磨削性能好、加工精度高,使用寿命长。
本发明解决以上技术问题的技术方案是:
一种超宽幅砂光研磨带的制备方法,包括以下流程:基材开卷—印制商标—涂底胶—静电植砂—预干燥—涂复胶—烘干—收卷—隧道式固化炉—揉曲整理—切边收卷—检验入库,其中:
(1)上底胶
配置底胶胶粘剂用精密涂胶机涂覆在基材表面完成上底胶工序,对上完底胶后的基材进行烘干,烘干温度为90-110℃,烘干时间为10-13min;
底胶涂层厚0.1-0.6mm;
(2)静电植砂
将磨料搅拌均匀,用静电植砂法植入底胶层表面,在80-85℃下,预干燥处理20-25min;
(3)上复胶
在植砂的底胶上再涂覆一层复胶胶粘剂完成复胶工序,在80-120℃下烘干,复胶涂层厚0.1-0.6mm;
(4)隧道式固化
将收卷后的基材固定好,放置到小车中,推入隧道式固化炉的隧道内,初始温为50-70℃,终温为150-180℃,控制时间为20-23h,最后降温至30-50℃,打开炉门取出。
本发明进一步限定的技术方案为:
前述超宽幅砂光研磨带的制备方法中,基材开卷前要对基材进行前处理,包括以下流程:坯布—烧毛—热水退浆—浸渍—干燥—刮浆—拉伸干燥—高温定型—收卷备用,其中:
(1)浸渍
将基材置于浸渍液中在30-35℃下浸渍10-15min,其中:
浸渍液按质量份数计包括以下组分:
胶粘剂:30-40份,定型剂:1-3份,柔软剂:1-2份,吸附剂:2-5份,抗静电剂:1-3份,填料:3-5份,水:5-8份;
柔软剂为山梨醇脂肪酸酯或聚氧乙烯失水山梨醇脂肪酸酯;抗静电剂采用阴离子型抗静电剂;填料为小于 400 目的重钙、轻钙、白垩土、硅藻土或硅灰粉中的至少一种;吸附剂为氧化铝或碳化硅粉;
胶粘剂按质量份数计包括以下组分:
酚醛树脂:40-50份,甲醛:10-12份,缩醛:0.5-1份,苯酚:14-18份,氨水:1-3份,偶联剂:3-5份,流平剂:1-3份,石墨:1-2份,发泡剂:1-2份,滑石粉:5-7份,丁腈胶:12-15份,白炭黑:1-3份,石油树脂:10-15份,纳米氧化锌:5-7份,对苯二酚:3-7份,硫黄:1-3份,甲基异丁基甲酮:5-7份;
偶联剂为硅烷偶联剂;发泡剂为三聚氰胺或氯化石蜡;流平剂为醋丁纤维素或聚丙烯醋酯中的一种;
(2)拉伸干燥与高温定型
将基材经定型机进行烘干,在120-125℃下进行预定型,然后在200-240℃高温蒸汽中受热2min,然后用18℃冷风迅速降温定型。
技术效果,决定布处理质量的先决条件是“浸渍”工艺,这是产品关键技术之一。目的是使基材的纤维内部浸入配制好的浸渍液,以利于后道工序的拉伸、高温定型、涂胶植砂,最终获得高强度、高柔韧性、低延伸率的磨粒载体材料;
浸渍其关键技术是浸渍溶液的配制技术,本发明用稀释的胶粘剂、定型剂、柔软剂、吸附剂、抗静电剂、各种填料按照科学组分配制而成,在一定温度下将基基材浸入其中,不断翻滚浸润,选择最适合的时间取出,目的是使基材的纤维内部浸入配制好的浸渍液,以利于后道工序的拉伸、高温定型、涂胶植砂,最终获得高强度、高柔韧性、低延伸率的磨粒载体材料;
石墨使其胶粘剂可以抗静电;滑石粉作为填料,可起到骨架作用,降低制造成本同时提高胶粘剂硬度,增加产品形状的稳定,增加张力强度,剪切强度,绕曲强度,压力强度,降低变形,伸张率,热膨胀系数,白度高、粒度均匀分散性强等特点,使胶粘剂的延展性以及可加工性等优良得到优化。
前述超宽幅砂光研磨带的制备方法中,胶粘剂的制备工艺具体为:
(1)将苯酚、氨水混合均匀,加入甲醛缓慢升温至80-85℃,反应2-3h,降温至40-60℃,加入偶联剂、流平剂、发泡剂、滑石粉再加入缩醛混合,在40-50℃下反应1h,减压蒸馏,降温出料;
(2)将丁腈胶在开炼机上塑炼1-3min,使其门尼粘度达到60-70,然后将酚醛树脂、石油树脂、白炭黑、硫黄、石墨、对苯二酚、纳米氧化锌、依次加入进行混炼,薄通后剪碎立即投入甲基异丁基甲酮溶胀,搅拌溶解后得到胶浆,然后加入步骤(2)的物料,搅拌均匀得到成品胶粘剂。
技术效果,吸收先进的研究成果,寻找新的途径对酚醛树脂进行进一步改性,探究新的成分组分与制备工艺,针对超宽幅砂带的性能要求,本发明的胶粘剂不仅是一种改性酚醛树脂还复合丁腈胶复合胶粘剂,本发明的胶粘剂剥离力能到达300N以上,破坏性试验达到R级,粘剂强度为8km.m-1,开发出粘结强度高、耐高温性能强、同时具有高柔韧性等性能的胶粘剂产品。
前述超宽幅砂光研磨带的制备方法中,基材为纯棉布或化纤布。
前述超宽幅砂光研磨带的制备方法中,底胶胶粘剂和复胶胶粘剂相同按质量份数计包括以下组分:
E-20环氧树脂:40-60份,按树皮:10-15份,氢氧化钠:7-11份,甲醛:8-10份,苯酚:5-7份,阻燃剂:0.5-1份,流平剂:1-2份,偶联剂:0.8-1.2份;
流平剂为醋丁纤维素或聚丙烯醋酯中的一种;所偶联剂为硅烷偶联剂;阻燃剂为磷酸三苯酯或磷酸甲苯二苯酯。
技术效果,按树皮粉提取物替代分布苯酚改性酚醛树脂胶粘剂,粘度上升了8%,贮存期翻倍,粘度比为改性的酚醛树脂胶粘剂提升了20%,湿强度提高了7%。
前述超宽幅砂光研磨带的制备方法中,底胶胶粘剂和复胶胶粘剂的制备方法具体包括以下步骤:
(1)取新鲜的按树皮,晒干,清洗后,切成小段,于阴凉处干燥至与环境湿度相同后,将按树皮放置在真空干燥箱100℃烘箱反复烘至质量不再变化,将干燥好的树皮粉碎,过80#筛,密封;
(2)取步骤(1)树皮粉,用水浸提,用布氏漏斗进行真空抽滤,滤液用旋转蒸发器真空去除,然后用二氯甲烷萃取去除其中脂肪酸及油溶性物质,保留水相,将水相转移至温度在50-60℃下旋转蒸发器中,在真空下进行浓缩,得到提取物;
(3)将苯酚、树皮提取物和氢氧化钠水溶液混合搅拌均匀,温度在50-60℃,然后加入甲醛,升温至80-90℃,保温20-30min,降温至70-80℃,然后再加入甲醛,升温至90-95℃,保温20-30℃,然后迅速降温至40-45℃,然后加入E-20环氧树脂、偶联剂、流平剂、阻燃剂混合均匀出料得到胶粘剂。
前述超宽幅砂光研磨带的制备方法中,磨料为氮化硼、单晶刚玉及氧化铝的混合物,按质量比计氮化硼:单晶刚玉:氧化铝=1:1:2。
前述超宽幅砂光研磨带的制备方法中,磨料在使用时先进行处理,具体为:
将磨料混合均匀制成微粉然后加入结合剂经粘结、制粒、筛分精制成砂;
磨料为微粉级或纳米级研磨微粉级。
技术效果,传统产品使用的磨料一般都是单一型的,即氧化铝、碳化硅,本发明磨料为氮化硼、单晶刚玉及氧化铝的混合物,制备成新型的“磨料”。制备的产品,具有特好的磨削效果,使用寿命长,加工精度高,初步实现了质的飞跃。本发明复合磨料技术,采用多种磨料混合,充分发挥了各种磨料优异的磨削性能并克服了各自的缺陷,大幅度提高了产品的磨削效率,加工精度高,产品可达到“磨抛一体”研磨效果;本发明采用磨料,并先制备成磨料微粉,然后结合剂经粘结、制粒、筛分精制成砂,这种砂磨削效率高、磨粒容屑空间大不易堵塞、磨粒自锐性好、磨削时升温低、寿命超长、磨削表面质量好、稳定、适用于自动化设备的使用。
前述超宽幅砂光研磨带的制备方法中,制得的超宽幅砂光研磨带的性能技术指标为:经向断裂强度(N/5cm)≥1900;纬向断裂强度(N/5cm) ≥1500;600N伸长率%≤2.0;经向断裂伸长率%≤20.0;纬向断裂伸长率%≤30.0;剥离强度(N/5cm) ≥150;门幅宽度mm:1600-1710mm。
本发明的有益效果是:
本发明制备的具有国际领先水平的超宽幅研磨带产品,替代进口,同时带动国内同业企业的科技进步与产品创新,为国内外制造业提供高效、优质的磨削加工工具。
本发明制备研磨带具有力学性能稳定、工作面不易堵塞、磨粒自锐性好、磨削升温低、加工质量优异、使用寿命超长等优势,与现有世界顶级产品相抗衡;产品应用时不需要进行裁剪与纵向拼接,节省了材料、能耗与人工成本,本发明在静电植砂时磨料采用混合而成,氧化铝具有较高的熔点,出色的机械强度、硬度、高电阻率和导热性能,扬长避短,多种磨料进行混合,耐磨、耐热性更强,解决磨料与各种磨削要求匹配的研究,进一步提升产品的磨削效率。
胶粘剂是涂附磨具产品的关键材料,它决定了涂附磨具产品的品质与性能。科学研究表明,影响涂附磨具产品品质的18个要素中,有13个要素在胶粘剂当中。可见胶粘剂是涂附磨具产品的核心材料,也是最关键的材料,是产品的技术含量之所在。目前胶粘剂制备大多是酚醛树脂的改性材料。酚醛树脂是一种人工合成的综合性能优良的高分子材料,其原料易得,价格低廉、工艺设备简单,其制品具有优异的机械性能、耐热、耐寒和绝缘性能,广泛用作模塑料、胶粘剂、涂料等,是涂附磨具产品生产厂家的首选。但是酚醛树脂结构上的酚羟基和亚甲基容易氧化,耐热性受到影响,纯酚醛树脂已不能满足许多高新技术领域的要求,为适应精密加工、车船制造、电子化工及国防军工等高新技术领域的需要,利用各种方法对酚醛树脂进行改性研究,提高其粘结强度与耐热性是酚醛树脂复合改性的研究重点和发展方向,针对超宽幅砂带的性能要求,开发出粘结强度高、耐高温性能强、同时具有、高柔韧性等性能的胶粘剂产品。
本发明在固化工艺中采用隧道式固化,固化温度条件与固化时间严格限制,在固化过程中会发生物理和化学变化,伴随着有水分等气体蒸出,使用梯度升温可以使体系内部的交联固化程度迅速升温至较高的水平,显著改善胶粘剂中酚醛树脂体系在高温条件下的热力学性能。
本发明权利要求中严苛限制了浸渍的时间温度等,这道工艺直接影响后道的拉伸定型直至涂胶的均匀度、植砂的均匀度和终端产品的均衡质量。因为浸渍工艺处理不好,产品脱机后就会出现胶粘剂容易剥落、两边边缘质量与中间质量不均匀,平整度不均匀等现象,因此,严格规定浸渍的工艺能最终保证产品质量。
具体实施方式
实施例1
本实施例提供一种超宽幅砂光研磨带的制备方法,包括以下流程:基材开卷—印制商标—涂底胶—静电植砂—预干燥—涂复胶—烘干—收卷—隧道式固化炉—揉曲整理—切边收卷—检验入库,其中:
(1)上底胶
配置底胶胶粘剂用精密涂胶机涂覆在基材表面完成上底胶工序,对上完底胶后的基材进行烘干,烘干温度为90℃,烘干时间为10min;
底胶涂层厚0.1mm;
(2)静电植砂
将磨料搅拌均匀,用静电植砂法植入底胶层表面,在80℃下,预干燥处理20min;
(3)上复胶
在植砂的底胶上再涂覆一层复胶胶粘剂完成复胶工序,在80℃下烘干,复胶涂层厚0.3mm;
(4)隧道式固化
将收卷后的基材固定好,放置到小车中,推入隧道式固化炉的隧道内,初始温为50℃,终温为150℃,控制时间为20h,最后降温至30℃,打开炉门取出。
在本实施例中,基材开卷前要对基材进行前处理,包括以下流程:坯布—烧毛—热水退浆—浸渍—干燥—刮浆—拉伸干燥—高温定型—收卷备用,其中:
(1)浸渍
将基材置于浸渍液中在30℃下浸渍10min,其中:
浸渍液按质量份数计包括以下组分:
胶粘剂:30份,定型剂:1-3份,柔软剂:1份,吸附剂:2份,抗静电剂:1份,填料:3份,水:5份;
柔软剂为山梨醇脂肪酸酯或聚氧乙烯失水山梨醇脂肪酸酯;抗静电剂采用阴离子型抗静电剂;填料为小于 400 目的重钙;吸附剂为氧化铝,定型剂采用现有的;
胶粘剂按质量份数计包括以下组分:
酚醛树脂:40份,甲醛:10份,缩醛(苯甲醛缩二甲醇):0.5份,苯酚:14份,氨水:1份,偶联剂:3份,流平剂:1份,石墨:1份,发泡剂:1份,滑石粉:5份,丁腈胶:12份,白炭黑:1份,石油树脂:10份,纳米氧化锌:5份,对苯二酚:3份,硫黄:1份,甲基异丁基甲酮:5份;
偶联剂为硅烷偶联剂;发泡剂为三聚氰胺;流平剂为醋丁纤维素;
(2)拉伸干燥与高温定型
将基材经定型机进行烘干,在120℃下进行预定型,然后在200℃高温蒸汽中受热2min,然后用18℃冷风迅速降温定型。
上述胶粘剂的制备工艺具体为:
(1)将苯酚、氨水混合均匀,加入甲醛缓慢升温至80℃,反应2h,降温至40℃,加入偶联剂、流平剂、发泡剂、滑石粉再加入缩醛混合,在40℃下反应1h,减压蒸馏,降温出料;
(2)将丁腈胶在开炼机上塑炼1min,使其门尼粘度达到60,然后将酚醛树脂、石油树脂、白炭黑、硫黄、石墨、对苯二酚、纳米氧化锌、依次加入进行混炼,薄通后剪碎立即投入甲基异丁基甲酮溶胀,搅拌溶解后得到胶浆,然后加入步骤(2)的物料,搅拌均匀得到成品胶粘剂。
本实施例中,基材为纯棉布。
本实施例中,底胶胶粘剂和复胶胶粘剂相同按质量份数计包括以下组分:
E-20环氧树脂:40份,按树皮:10份,氢氧化钠:7份,甲醛:8份,苯酚:5份,阻燃剂:0.5份,流平剂:1份,偶联剂:0.8份,
流平剂为醋丁纤维素;偶联剂为硅烷偶联剂;阻燃剂为磷酸三苯酯。
上述底胶胶粘剂和复胶胶粘剂的制备方法具体包括以下步骤:
(1)取新鲜的按树皮,晒干,清洗后,切成小段,于阴凉处干燥至与环境湿度相同后,将按树皮放置在真空干燥箱100℃烘箱反复烘至质量不再变化,将干燥好的树皮粉碎,过80#筛,密封;
(2)取步骤(1)树皮粉,用水浸提,用布氏漏斗进行真空抽滤,滤液用旋转蒸发器真空去除,然后用二氯甲烷萃取去除其中脂肪酸及油溶性物质,保留水相,将水相转移至温度在50℃下旋转蒸发器中,在真空下进行浓缩,得到提取物;
(3)将苯酚、树皮提取物和氢氧化钠水溶液混合搅拌均匀,温度在50℃,然后加入甲醛,升温至80℃,保温20min,降温至70℃,然后再加入甲醛,升温至90℃,保温20℃,然后迅速降温至40℃,然后加入E-20环氧树脂、偶联剂、流平剂、阻燃剂混合均匀出料得到胶粘剂。本实施例中,磨料为氮化硼、单晶刚玉及氧化铝的混合物,按质量比计氮化硼:单晶刚玉:氧化铝=1:1:2。
本实施例中,磨料在使用时先进行处理,具体为:
将磨料混合均匀制成微粉然后加入结合剂经粘结、制粒、筛分精制成砂;
磨料为微粉级或纳米级研磨微粉级。
本实施例中,制得的超宽幅砂光研磨带的性能技术指标为:经向断裂强度(N/5cm)≥1900;纬向断裂强度(N/5cm) ≥1500;600N伸长率%≤2.0;经向断裂伸长率%≤20.0;纬向断裂伸长率%≤30.0;剥离强度(N/5cm) ≥150;门幅宽度mm:1600mm。
实施例2
本实施例提供一种超宽幅砂光研磨带的制备方法,包括以下流程:基材开卷—印制商标—涂底胶—静电植砂—预干燥—涂复胶—烘干—收卷—隧道式固化炉—揉曲整理—切边收卷—检验入库,其中:
(1)上底胶
配置底胶胶粘剂用精密涂胶机涂覆在基材表面完成上底胶工序,对上完底胶后的基材进行烘干,烘干温度为106℃,烘干时间为13min;
底胶涂层厚0.6mm;
(2)静电植砂
将磨料搅拌均匀,用静电植砂法植入底胶层表面,在85℃下,预干燥处理25min;
(3)上复胶
在植砂的底胶上再涂覆一层复胶胶粘剂完成复胶工序,在90℃下烘干,复胶涂层厚0.1mm;
(4)隧道式固化
将收卷后的基材固定好,放置到小车中,推入隧道式固化炉的隧道内,初始温为70℃,终温为180℃,控制时间为23h,最后降温至50℃,打开炉门取出。
在本实施例中,基材开卷前要对基材进行前处理,包括以下流程:坯布—烧毛—热水退浆—浸渍—干燥—刮浆—拉伸干燥—高温定型—收卷备用,其中:
(1)浸渍
将基材置于浸渍液中在35℃下浸渍15min,其中:
浸渍液按质量份数计包括以下组分:
胶粘剂:40份,定型剂:3份,柔软剂:2份,吸附剂:5份,抗静电剂:3份,填料:5份,水:8份;
柔软剂为山聚氧乙烯失水山梨醇脂肪酸酯;抗静电剂采用阴离子型抗静电剂;填料为小于 400 目的轻钙;吸附剂为碳化硅粉,定型剂采用现有的;
胶粘剂按质量份数计包括以下组分:
酚醛树脂:50份,甲醛:12份,缩醛(苯甲醛缩二甲醇):1份,苯酚:18份,氨水:3份,偶联剂:5份,流平剂:3份,石墨:2份,发泡剂:2份,滑石粉:7份,丁腈胶:15份,白炭黑:3份,石油树脂:15份,纳米氧化锌:7份,对苯二酚:7份,硫黄:3份,甲基异丁基甲酮:7份;
偶联剂为硅烷偶联剂;发泡剂为氯化石蜡;流平剂为聚丙烯醋酯;
(2)拉伸干燥与高温定型
将基材经定型机进行烘干,在125℃下进行预定型,然后在240℃高温蒸汽中受热2min,然后用18℃冷风迅速降温定型。
上述胶粘剂的制备工艺具体为:
(1)将苯酚、氨水混合均匀,加入甲醛缓慢升温至85℃,反应3h,降温至60℃,加入偶联剂、流平剂、发泡剂、滑石粉再加入缩醛混合,在50℃下反应1h,减压蒸馏,降温出料;
(2)将丁腈胶在开炼机上塑炼3min,使其门尼粘度达到70,然后将酚醛树脂、石油树脂、白炭黑、硫黄、石墨、对苯二酚、纳米氧化锌、依次加入进行混炼,薄通后剪碎立即投入甲基异丁基甲酮溶胀,搅拌溶解后得到胶浆,然后加入步骤(2)的物料,搅拌均匀得到成品胶粘剂。
本实施例中,基材为纯棉布或化纤布。
本实施例中,底胶胶粘剂和复胶胶粘剂相同按质量份数计包括以下组分:
E-20环氧树脂:60份,按树皮:15份,氢氧化钠:11份,甲醛:10份,苯酚:7份,阻燃剂:1份,流平剂:2份,偶联剂:1.2份,
流平剂为醋丁纤维素;偶联剂为硅烷偶联剂;阻燃剂为磷酸三苯酯。
上述底胶胶粘剂和复胶胶粘剂的制备方法具体包括以下步骤:
(1)取新鲜的按树皮,晒干,清洗后,切成小段,于阴凉处干燥至与环境湿度相同后,将按树皮放置在真空干燥箱100℃烘箱反复烘至质量不再变化,将干燥好的树皮粉碎,过80#筛,密封;
(2)取步骤(1)树皮粉,用水浸提,用布氏漏斗进行真空抽滤,滤液用旋转蒸发器真空去除,然后用二氯甲烷萃取去除其中脂肪酸及油溶性物质,保留水相,将水相转移至温度在60℃下旋转蒸发器中,在真空下进行浓缩,得到提取物;
(3)将苯酚、树皮提取物和氢氧化钠水溶液混合搅拌均匀,温度在60℃,然后加入甲醛,升温至90℃,保温30min,降温至80℃,然后再加入甲醛,升温至95℃,保温30℃,然后迅速降温至45℃,然后加入E-20环氧树脂、偶联剂、流平剂、阻燃剂混合均匀出料得到胶粘剂。
本实施例中,磨料为氮化硼、单晶刚玉及氧化铝的混合物,按质量比计氮化硼:单晶刚玉:氧化铝=1:1:2。
本实施例中,磨料在使用时先进行处理,具体为:
将磨料混合均匀制成微粉然后加入结合剂经粘结、制粒、筛分精制成砂;
磨料为微粉级或纳米级研磨微粉级。
本实施例中,制得的超宽幅砂光研磨带的性能技术指标为:经向断裂强度(N/5cm)≥1900;纬向断裂强度(N/5cm) ≥1500;600N伸长率%≤2.0;经向断裂伸长率%≤20.0;纬向断裂伸长率%≤30.0;剥离强度(N/5cm) ≥150;门幅宽度mm:1710mm。
实施例3
本实施例提供一种超宽幅砂光研磨带的制备方法,包括以下流程:基材开卷—印制商标—涂底胶—静电植砂—预干燥—涂复胶—烘干—收卷—隧道式固化炉—揉曲整理—切边收卷—检验入库,其中:
(1)上底胶
配置底胶胶粘剂用精密涂胶机涂覆在基材表面完成上底胶工序,对上完底胶后的基材进行烘干,烘干温度为110℃℃,烘干时间为11min;
底胶涂层厚0.3mm;
底胶涂层厚5微米;
(2)静电植砂
将磨料搅拌均匀,用静电植砂法植入底胶层表面,在82℃下,预干燥处理23min;
(3)上复胶
在植砂的底胶上再涂覆一层复胶胶粘剂完成复胶工序,在120℃下烘干,复胶涂层厚0.6mm;
(4)隧道式固化
将收卷后的基材固定好,放置到小车中,推入隧道式固化炉的隧道内,初始温为60℃,终温为170℃,控制时间为22h,最后降温至40℃,打开炉门取出。
在本实施例中,基材开卷前要对基材进行前处理,包括以下流程:坯布—烧毛—热水退浆—浸渍—干燥—刮浆—拉伸干燥—高温定型—收卷备用,其中:
(1)浸渍
将基材置于浸渍液中在32℃下浸渍12min,其中:
浸渍液按质量份数计包括以下组分:
胶粘剂:35份,定型剂:2份,柔软剂:2份,吸附剂:3份,抗静电剂:2份,填料:4份,水:7份;
柔软剂为山梨醇脂肪酸酯;抗静电剂采用阴离子型抗静电剂;填料为小于 400 目的硅藻土;吸附剂为碳化硅粉,定型剂采用现有的;
胶粘剂按质量份数计包括以下组分:
酚醛树脂:45份,甲醛:11份,缩醛(苯甲醛缩二甲醇):0.8份,苯酚:16份,氨水:2份,偶联剂:4份,流平剂:2份,石墨:2份发泡剂:1份,滑石粉:6份,丁腈胶:13份,白炭黑:2份,石油树脂:12份,纳米氧化锌:6份,对苯二酚:5份,硫黄:2份,甲基异丁基甲酮:6份;
偶联剂为硅烷偶联剂;发泡剂为三聚氰胺;流平剂为聚丙烯醋酯;
(2)拉伸干燥与高温定型
将基材经定型机进行烘干,在122℃下进行预定型,然后在220℃高温蒸汽中受热2min,然后用18℃冷风迅速降温定型。
上述胶粘剂的制备工艺具体为:
(1)将苯酚、氨水混合均匀,加入甲醛缓慢升温至82℃,反应2h,降温至50℃,加入偶联剂、流平剂、发泡剂、滑石粉再加入缩醛混合,在45℃下反应1h,减压蒸馏,降温出料;
(2)将丁腈胶在开炼机上塑炼2min,使其门尼粘度达到65,然后将酚醛树脂、石油树脂、白炭黑、硫黄、石墨、对苯二酚、纳米氧化锌、依次加入进行混炼,薄通后剪碎立即投入甲基异丁基甲酮溶胀,搅拌溶解后得到胶浆,然后加入步骤(2)的物料,搅拌均匀得到成品胶粘剂。
本实施例中,基材为纯棉布或化纤布。
本实施例中,底胶胶粘剂和复胶胶粘剂相同按质量份数计包括以下组分:
E-20环氧树脂:50份,按树皮:12份,氢氧化钠:9份,甲醛:9份,苯酚:6份,阻燃剂:0.8份,流平剂:2份,偶联剂:1.0份,
流平剂为醋丁纤维素;偶联剂为硅烷偶联剂;阻燃剂为磷酸三苯酯。
上述底胶胶粘剂和复胶胶粘剂的制备方法具体包括以下步骤:
(1)取新鲜的按树皮,晒干,清洗后,切成小段,于阴凉处干燥至与环境湿度相同后,将按树皮放置在真空干燥箱100℃烘箱反复烘至质量不再变化,将干燥好的树皮粉碎,过80#筛,密封;
(2)取步骤(1)树皮粉,用水浸提,用布氏漏斗进行真空抽滤,滤液用旋转蒸发器真空去除,然后用二氯甲烷萃取去除其中脂肪酸及油溶性物质,保留水相,将水相转移至温度在55℃下旋转蒸发器中,在真空下进行浓缩,得到提取物;
(3)将苯酚、树皮提取物和氢氧化钠水溶液混合搅拌均匀,温度在55℃,然后加入甲醛,升温至85℃,保温25min,降温至75℃,然后再加入甲醛,升温至92℃,保温25℃,然后迅速降温至42℃,然后加入E-20环氧树脂、偶联剂、流平剂、阻燃剂混合均匀出料得到胶粘剂。本实施例中,磨料为氮化硼、单晶刚玉及氧化铝的混合物,按质量比计氮化硼:单晶刚玉:氧化铝=1:1:2。
本实施例中,磨料在使用时先进行处理,具体为:
将磨料混合均匀制成微粉然后加入结合剂经粘结、制粒、筛分精制成砂;
磨料为微粉级或纳米级研磨微粉级。
本实施例中,制得的超宽幅砂光研磨带的性能技术指标为:经向断裂强度(N/5cm)≥1900;纬向断裂强度(N/5cm) ≥1500;600N伸长率%≤2.0;经向断裂伸长率%≤20.0;纬向断裂伸长率%≤30.0;剥离强度(N/5cm) ≥150;门幅宽度mm:1680mm。
除上述实施例外,本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案,均落在本发明要求的保护范围。

Claims (8)

1.一种超宽幅砂光研磨带的制备方法,其特征在于,包括以下流程:基材开卷—印制商标—涂底胶—静电植砂—预干燥—涂复胶—烘干—收卷—隧道式固化炉—揉曲整理—切边收卷—检验入库,其中:
(1)上底胶
配置底胶胶粘剂用精密涂胶机涂覆在基材表面完成上底胶工序,对上完底胶后的基材进行烘干,烘干温度为90-110℃,烘干时间为10-13min;
底胶涂层厚0.1-0.6mm;
(2)静电植砂
将磨料搅拌均匀,用静电植砂法植入底胶层表面,在80-85℃下,预干燥处理20-25min;
(3)上复胶
在植砂的底胶上再涂覆一层复胶胶粘剂完成复胶工序,在80-120℃下烘干,复胶涂层厚0.1-0.6mm;
(4)隧道式固化
将收卷后的基材固定好,放置到小车中,推入隧道式固化炉的隧道内,初始温为50-70℃,终温为150-180℃,控制时间为20-23h,最后降温至30-50℃,打开炉门取出;
所述基材开卷前要对基材进行前处理,包括以下流程:坯布—烧毛—热水退浆—浸渍—干燥—刮浆—拉伸干燥—高温定型—收卷备用,其中:
(1)浸渍
将基材置于浸渍液中在30-35℃下浸渍10-15min,其中:
所述的浸渍液按质量份数计包括以下组分:
胶粘剂:30-40份,定型剂:1-3份,柔软剂:1-2份,吸附剂:2-5份,抗静电剂:1-3份,填料:3-5份,水:5-8份;
所述的柔软剂为山梨醇脂肪酸酯或聚氧乙烯失水山梨醇脂肪酸酯;所述的抗静电剂采用阴离子型抗静电剂;所述填料为小于 400 目的重钙、轻钙、白垩土、硅藻土或硅灰粉中的至少一种;所述吸附剂为氧化铝或碳化硅粉;
所述的胶粘剂按质量份数计包括以下组分:
酚醛树脂:40-50份,甲醛:10-12份,缩醛:0.5-1份,苯酚:14-18份,氨水:1-3份,偶联剂:3-5份,流平剂:1-3份,石墨:1-2份,发泡剂:1-2份,滑石粉:5-7份,丁腈胶:12-15份,白炭黑:1-3份,石油树脂:10-15份,纳米氧化锌:5-7份,对苯二酚:3-7份,硫黄:1-3份,甲基异丁基甲酮:5-7份;
所述的偶联剂为硅烷偶联剂;所述的发泡剂为三聚氰胺或氯化石蜡;所述的流平剂为醋丁纤维素或聚丙烯醋酯中的一种;
(2)拉伸干燥与高温定型
将基材经定型机进行烘干,在120-125℃下进行预定型,然后在200-240℃高温蒸汽中受热2min,然后用18℃冷风迅速降温定型。
2.根据权利要求1所述的超宽幅砂光研磨带的制备方法,其特征在于:所述胶粘剂的制备工艺具体为:
(1)将苯酚、氨水混合均匀,加入甲醛缓慢升温至80-85℃,反应2-3h,降温至40-60℃,加入偶联剂、流平剂、发泡剂、滑石粉再加入缩醛混合,在40-50℃下反应1h,减压蒸馏,降温出料;
(2)将丁腈胶在开炼机上塑炼1-3min,使其门尼粘度达到60-70,然后将酚醛树脂、石油树脂、白炭黑、硫黄、石墨、对苯二酚、纳米氧化锌、依次加入进行混炼,薄通后剪碎立即投入甲基异丁基甲酮溶胀,搅拌溶解后得到胶浆,然后加入步骤(1)的物料,搅拌均匀得到成品胶粘剂。
3.根据权利要求1所述的超宽幅砂光研磨带的制备方法,其特征在于:所述的基材为纯棉布或化纤布。
4.根据权利要求1所述的超宽幅砂光研磨带的制备方法,其特征在于:所述底胶胶粘剂和复胶胶粘剂相同按质量份数计包括以下组分:
E-20环氧树脂:40-60份,桉树皮:10-15份,氢氧化钠:7-11份,甲醛:8-10份,苯酚:5-7份,阻燃剂:0.5-1份,流平剂:1-2份,偶联剂:0.8-1.2份;
所述的流平剂为醋丁纤维素或聚丙烯醋酯中的一种;所述的偶联剂为硅烷偶联剂;所述的阻燃剂为磷酸三苯酯或磷酸甲苯二苯酯。
5.根据权利要求4所述的超宽幅砂光研磨带的制备方法,其特征在于:所述底胶胶粘剂和复胶胶粘剂的制备方法具体包括以下步骤:
(1)取新鲜的桉树皮,晒干,清洗后,切成小段,于阴凉处干燥至与环境湿度相同后,将桉树皮放置在真空干燥箱100℃烘箱反复烘至质量不再变化,将干燥好的树皮粉碎,过80#筛,密封;
(2)取步骤(1)树皮粉,用水浸提,用布氏漏斗进行真空抽滤,滤液用旋转蒸发器真空去除,然后用二氯甲烷萃取去除其中脂肪酸及油溶性物质,保留水相,将水相转移至温度在50-60℃下旋转蒸发器中,在真空下进行浓缩,得到提取物;
(3)将苯酚、树皮提取物和氢氧化钠水溶液混合搅拌均匀,温度在50-60℃,然后加入甲醛,升温至80-90℃,保温20-30min,降温至70-80℃,然后再加入甲醛,升温至90-95℃,保温20-30℃,然后迅速降温至40-45℃,然后加入E-20环氧树脂、偶联剂、流平剂、阻燃剂混合均匀出料得到胶粘剂。
6.根据权利要求1所述的超宽幅砂光研磨带的制备方法,其特征在于:所述磨料为氮化硼、单晶刚玉及氧化铝的混合物,按质量比计氮化硼:单晶刚玉:氧化铝=1:1:2。
7.根据权利要求6所述的超宽幅砂光研磨带的制备方法,其特征在于:磨料在使用时先进行处理,具体为:
将磨料混合均匀制成微粉然后加入结合剂经粘结、制粒、筛分精制成砂;
所述的磨料为微粉级或纳米级研磨微粉级。
8.根据权利要求1所述的超宽幅砂光研磨带的制备方法,其特征在于:制得的超宽幅砂光研磨带的性能技术指标为:经向断裂强度(N/5cm)≥1900;纬向断裂强度(N/5cm) ≥1500;600N伸长率%≤2.0;经向断裂伸长率%≤20.0;纬向断裂伸长率%≤30.0;剥离强度(N/5cm) ≥150;门幅宽度mm:1600-1710mm。
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