CN113185924A - 一种带支撑涂覆热熔胶的无纺布制备方法 - Google Patents

一种带支撑涂覆热熔胶的无纺布制备方法 Download PDF

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CN113185924A
CN113185924A CN202110567045.7A CN202110567045A CN113185924A CN 113185924 A CN113185924 A CN 113185924A CN 202110567045 A CN202110567045 A CN 202110567045A CN 113185924 A CN113185924 A CN 113185924A
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傅陆军
傅华东
傅天天
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Hangzhou Kaiyue New Material Co ltd
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Abstract

本发明涉及一种带支撑涂覆热熔胶的无纺布制备方法，将水溶性聚氨酯溶液与丁苯胶乳混合搅拌，形成复配乳液后加入蒸馏水、硅藻土与碳酸钙粉的混合物搅拌均匀，将制成的浆液倒入浸胶槽，将无纺布在浆液中浸轧、以烘箱拉边定型烘干，冷却后收卷，再在其上下表面各涂一层EVA热熔胶，冷却晾干收卷，得到无纺布成品。本发明借助水性聚氨酯溶液良好的粘结效果，在无纺布浸轧过程中使浆液更牢固粘附在无纺布上，提升产品刚度和回弹，丁苯胶乳提升产品倒塌负荷和硬度，产品的支撑和物理性能明显提高；在与较薄的热熔胶膜复合粘接后，极大程度减少产品在实际使用过程中出现的易卷边、坍塌等不良现象；材料成本较低，工艺简单，具有良好的市场应用前景。

Description

一种带支撑涂覆热熔胶的无纺布制备方法
技术领域
本发明涉及无纺布及熔胶膜技术领域，特别涉及一种带支撑涂覆热熔胶的无纺布制备方法。
背景技术
无纺布作为新一代环保材料，具有防潮、透气、质轻、无刺激性、容易分解、生物抑菌性能好、价格低廉、可循环再用等特点。当前，无纺布主要通过粘接其他材料被广泛应用在医疗、服装服饰、家纺等行业产品中。
现有技术中，无纺布的粘接用胶基本可分为喷胶和热熔胶；传统喷胶常出现脱胶的情况，影响美观且存在对环境不友好的问题，而热熔胶是一种热粘合剂，常温下是稳定的固态，加热到一定温度后熔化产生黏性，可以完成材料的粘接；热熔胶与喷胶相比，在环保方面具有非常大的优势。
然而，由于无纺布一般是厚度较小，若使用厚度太大的热熔胶膜对其进行复合粘接，则极易产生产品透胶等的质量问题，而选择较薄的热熔胶膜与无纺布进行复合粘接又使得成品出现卷边、易坍塌等不良现象，影响使用体验。
发明内容
为克服现有技术存在缺陷，本发明提供一种带支撑涂覆热熔胶的无纺布制备方法，在产品制备过程中，借助水性聚氨酯溶液的易粘结与丁苯胶乳的抗压塌特性，得到支撑性及其他物理性能更好的无纺布产品，具有一定的实际应用价值。
一种带支撑涂覆热熔胶的无纺布制备方法，是通过以下技术方案实现的：
S.1 按照质量百分数，将水溶性聚氨酯溶液与丁苯胶乳混合搅拌，形成复配乳液；
S.2 在复配乳液中加入蒸馏水、硅藻土与碳酸钙粉的混合物搅拌均匀，制成浆液；
S.3 将浆液倒入浸胶槽，在一定浸轧率下，将无纺布在浆液中浸轧；
S.4 将完成浸轧的无纺布以烘箱拉边定型烘干，冷却后收卷；
S.5 将收卷后的无纺布置于涂胶机，在其上下表面各涂一层EVA热熔胶，冷却晾干收卷，得到无纺布成品。
优选的，所述S.2中，浆液由按质量分数计的55~65%复配乳液、15-20%蒸馏水、15~25%硅藻土与碳酸钙粉混合物组成。
优选的，所述复配乳液中水溶性聚氨酯溶液与丁苯胶乳质量比为2:8~1:9；一般来说，水溶性聚氨酯溶液中的固含量为20%~50%。
优选地，所述硅藻土与碳酸钙粉混合物中硅藻土与碳酸钙粉质量比为1:1~7:3。
优选的，所述浸轧率50~70%。
优选的，所述烘箱烘干温度为175~190℃。
优选的，所述无纺布在浆液里浸轧过程中，浸胶槽下面的震动搅拌器处于开启状态。
优选的，所述EVA热熔胶克重为120~150g/m2。
本发明提供了一种带支撑涂覆热熔胶的无纺布制备方法，借助水性聚氨酯溶液良好的粘结效果，在无纺布浸轧的过程中可以使浆液更牢固的粘附在无纺布上，对产品的刚度和回弹有着积极影响；丁苯胶乳的添加使得产品的压塌，硬度有了良好的改观，二者相辅相成，对产品的支撑和物理性能都有了明显的提高；在与较薄的热熔胶膜复合粘接后，极大程度减少产品在实际使用过程中出现的易卷边儿，易坍塌等不良现象。
本发明的带支撑涂覆热熔胶的无纺布材料成本较低，工艺简单，具有良好的市场应用前景。
具体实施方式
下面结合具体实施例方式对本发明的技术方案作进一步的详细阐述。
实施例1
取61.11g水溶性聚氨酯溶液与488.89g丁苯胶乳混合搅拌形成复配乳液，再加入200g蒸馏水、175g硅藻土与75g碳酸钙粉混合物搅拌均匀，制成浆液，然后倒入浸胶槽，浸轧率为70%条件下，将无纺布在浆液中浸轧，再经过190℃烘箱拉边定型烘干，冷却后收卷；将收卷后的产品置于涂胶机，在其上下表面各涂一层克重为150g/m2 EVA热熔胶，冷却晾干收卷，得到无纺布成品。
实施例2
取65g水溶性聚氨酯溶液与585g丁苯胶乳混合搅拌形成复配乳液，再加入150g蒸馏水、117g硅藻土与83g碳酸钙粉混合物搅拌均匀，制成浆液，然后倒入浸胶槽，浸轧率为60%条件下，将无纺布在浆液中浸轧，再经过182℃烘箱拉边定型烘干，冷却后收卷；将收卷后的产品置于涂胶机，在其上下表面各涂一层克重为120g/m2 EVA热熔胶，冷却晾干收卷，得到无纺布成品。
实施例3
取54g水溶性聚氨酯溶液与545g丁苯胶乳混合搅拌形成复配乳液，再加入175g蒸馏水、75g硅藻土与75g碳酸钙粉混合物搅拌均匀，制成浆液，然后倒入浸胶槽，浸轧率为50%条件下，将无纺布在浆液中浸轧，再经过175℃烘箱拉边定型烘干，冷却后收卷；将收卷后的产品置于涂胶机，在其上下表面各涂一层克重为135g/m2 EVA热熔胶，冷却晾干收卷，得到无纺布成品。
对实施例1~3的无纺布成品进行性能测试，如表1所示：
表1：对实施例1~3的无纺布成品的性能测试
Figure DEST_PATH_IMAGE001
测试结果证明，本发明的制备方法得到的产品的支撑和物理性能均较现有技术存在明显的提高。

Claims (8)

1.一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述的制备方法为以下步骤：
S.1 按照质量百分数，将水溶性聚氨酯溶液与丁苯胶乳混合搅拌，形成复配乳液；
S.2 在复配乳液中加入蒸馏水、硅藻土与碳酸钙粉的混合物搅拌均匀，制成浆液；
S.3 将浆液倒入浸胶槽，在一定浸轧率下，将无纺布在浆液中浸轧；
S.4 将完成浸轧的无纺布以烘箱拉边定型烘干，冷却后收卷；
S.5 将收卷后的无纺布置于涂胶机，在其上下表面各涂一层EVA热熔胶，冷却晾干收卷，得到无纺布成品。
2.如权利要求1所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述S.2中，浆液由按质量分数计的55~65%复配乳液、15-20%蒸馏水、15~25%硅藻土与碳酸钙粉混合物组成。
3.如权利要求2所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述复配乳液中水溶性聚氨酯溶液与丁苯胶乳质量比为2:8~1:9。
4.如权利要求2所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述硅藻土与碳酸钙粉混合物中硅藻土与碳酸钙粉质量比为1:1~7:3。
5.如权利要求1所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述浸轧率50~70%。
6.如权利要求1所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述烘箱烘干温度为175~190℃。
7.如权利要求1所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述无纺布在浆液里浸轧过程中，浸胶槽下面的震动搅拌器处于开启状态。
8.如权利要求1所述的一种带支撑涂覆热熔胶的无纺布制备方法，其特征在于，所述EVA热熔胶克重为120~150g/m2。
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