CN114806444B - 广告车身贴的制备工艺 - Google Patents

广告车身贴的制备工艺 Download PDF

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CN114806444B
CN114806444B CN202210245553.8A CN202210245553A CN114806444B CN 114806444 B CN114806444 B CN 114806444B CN 202210245553 A CN202210245553 A CN 202210245553A CN 114806444 B CN114806444 B CN 114806444B
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夏厚君
杨晓明
涂大记
潘华
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Zhejiang Fulai New Material Co ltd
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Abstract

本发明公开了一种广告车身贴的制备工艺,包括基材层、背胶层和离型层,所述基材层的一面上涂覆于背胶层,所述背胶层相背于基材层的一面设有离型层,此胶液通过以下步骤制得:将甲基丙烯酸甲酯、苯乙烯、丙烯酸丁酯、碳酸钠、六氯环三磷腈和去离子水混合均匀,升温至75~90℃,向该混合体系中滴加4,4'‑偶氮双(4‑氰基戊酸)和丙烯酸,反应3~5h;S2、冷却至室温,加入异丙醇铝、固化剂、三聚甘油单硬脂酸酯和对苯二酚,混合均匀得到胶液;将胶液均匀涂覆于基材层上,烘干得到背胶层。本发明使广告车身贴易剥离,无残胶,适合户外长时间使用,无需考虑更换广告贴时出现的残胶现象,大大降低了广告贴及车身损伤的几率。

Description

广告车身贴的制备工艺
技术领域
本发明属于胶带技术领域,尤其涉及一种广告车身贴的制备工艺。
背景技术
近几年来,以PVC为基材的数码喷绘材料发展非常迅速,应用相当广泛。由于PVC与胶粘层的粘接力较差、剥离强度较小,所以产品的加工性能和使用性能受到一定的影响。合适的胶黏剂是提高这类产品的剥离强度的关键因素。
现有的部分广告贴,例如车贴、水性高亮PVC,都具有PVC膜、粘接层和离型纸。户外的车贴虽然也可以作为户内喷墨材料使用,但因车贴产品使用的喷墨墨水为溶剂型,对作业和使用环境有污染,不符合户内的使用。另外,现有大部分车贴采用油性压敏胶,虽然耐候性优异、老化不残胶,但在生产过程中容易污染环境,不符合目前国家的环保要求。为达到环保要求,现有的广告车贴广泛采用水性压敏胶,然而该水性压敏胶在去除广告时容易残胶,为使用造成极大的不便。因此,如何开发一种不残胶的车身贴成为本领域技术人员的研究方向。
发明内容
本发明目的在于提供一种广告车身贴的制备工艺,该制备工艺制得的广告车身贴易剥离,无残胶,适合户外长时间使用,无需考虑更换广告贴时出现的残胶现象,大大降低了广告贴及车身损伤的几率。
为达到上述目的,本发明采用的技术方案是:一种广告车身贴的制备工艺,包括基材层、背胶层和离型层,所述基材层的一面上涂覆于背胶层,所述背胶层相背于基材层的一面设有离型层,所述背胶层由胶液涂覆烘干获得,此胶液通过以下步骤制得:
S1、将甲基丙烯酸甲酯20份、苯乙烯10份、丙烯酸丁酯15份、碳酸钠0.5份、六氯环三磷腈1份和去离子水50~80份混合均匀,升温至75~90℃,向该混合体系中滴加4,4'-偶氮双(4-氰基戊酸)0.5份和丙烯酸2份,反应3~5h;
S2、冷却至室温,加入异丙醇铝1份、固化剂3份、三聚甘油单硬脂酸酯0.2份和对苯二酚0.5份,混合均匀得到胶液。
上述技术方案中进一步改进的技术方案如下:
1. 上述方案中,所述固化剂选自固化剂S01-5、固化剂 MH2844、固化剂T-31中的一种。
2. 上述方案中,所述基材层的厚度为70-120μm。
3. 上述方案中,还包括以下步骤:在S2步骤后:将胶液均匀涂覆于基材层上,烘干得到背胶层。
由于上述技术方案的运用,本发明与现有技术相比具有下列优点:
1. 本发明广告车身贴的制备工艺,其通过在甲基丙烯酸甲酯、苯乙烯、丙烯酸丁酯、丙烯酸和4,4'-偶氮双(4-氰基戊酸)中添加碳酸钠和六氯环三磷腈,使广告车身贴易剥离,无残胶,适合户外长时间使用,无需考虑更换广告贴时出现的残胶现象,大大降低了广告贴及车身损伤的几率。
2. 本发明广告车身贴的制备工艺,其进一步进入三聚甘油单硬脂酸酯,使车身贴的剥离力快速达到稳定状态,不会随时间增加而增加,使该户外广告车身贴长时间贴合在车身上时,不会出现剥离困难的现象,便于后续的更换。
实施方式
在本专利的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于技术方案所示的方位或位置关系,仅是为了便于描述本专利和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对专利的限制;术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性;此外,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本专利的具体含义。
下面结合实施例对本发明作进一步描述:
实施例:一种广告车身贴的制备工艺,包括基材层、背胶层和离型层,所述基材层的一面上涂覆于背胶层,所述背胶层相背于基材层的一面设有离型层,所述背胶层由胶液涂覆烘干获得,此胶液通过以下步骤制得:
S1、S1、将甲基丙烯酸甲酯20份、苯乙烯10份、丙烯酸丁酯15份、碳酸钠0.5份、六氯环三磷腈1份和去离子水60份混合均匀,升温至75~90℃,向该混合体系中滴加4,4'-偶氮双(4-氰基戊酸)0.5份和丙烯酸2份,反应3~5h;
S2、冷却至室温,加入异丙醇铝1份、固化剂3份、三聚甘油单硬脂酸酯0.2份和对苯二酚0.5份,混合均匀得到胶液;
S3、将胶液均匀涂覆于基材层上,烘干得到背胶层。
甲基丙烯酸甲酯与苯乙烯的添加比例为2:1,上述固化剂选自固化剂S01-5。
上述基材层的厚度为75μm,上述背胶层2厚度为20μm。
对比例1~2:一种广告车身贴,包括基材层、背胶层和离型层,所述基材层的一面上涂覆于背胶层,所述背胶层相背于基材层的一面设有离型层,所述背胶层由胶液涂覆烘干获得,此胶液由以下重量份组分组成,如表1所示:
表1
对比例制备方法同实施例。
上述实施例和对比例1~2制得的数码喷绘贴膜的性能如表2所示:
表2
测试方法:
1、剥离力试验机测试样品的180°剥离力
(1)取卷状或片状样品,先将产品裁成25mm×300mm大小3-5条。
(2)镜面钢板:长度150±1mm,宽度50±1mm,厚度1.5mm-2mm。
(3)单面胶带:撕掉胶带上的离型材料,胶面不能接触手或其它物品,将胶面与镜面钢板的一端连接,用压辊(2Kg)在不施加外压情况下,以300mm/min的速度来回3次,使得胶面与镜面钢板充分接触,试样与镜面钢板粘合处不允许有气泡产生。
(4)试样制备后在规定的测试环境中停置20min后进行测试。
(5)将试样自由端对折180°,并从试板上剥开贴合面25mm,把试样自由端和试样板分别夹在上下夹持器上,应使剥离面与试验机力线保持一致,试验机以300mm/min±10mm/ min上升速度连续剥离,并有自动记录仪绘出剥离曲线。
(6)记录测试数据和破坏界面位置,取平均值。
2、老化后剥离力试验机测试样品的180°剥离力
(1)样品制作方法与上述一致。
(2)试样与镜面钢板贴合好后,分别将置于高温高湿85±2℃,85±5%R.H.环境下放置2000h、TC(-40℃~85℃6H/cycle,200cycle),之后取出静止2h,使用上述剥离力测试 方法进行测试。
(3)记录测试数据和破坏界面位置,取平均值。
如表2的评价结果所示,实施例户外广告车身贴剥离性能优良,长时间贴合无残胶,同时,在高温高湿的环境下长时间停留,剥离力快速达到稳定状态,不会持续增加,提高了粘贴稳定性也避免剥离时的困难,而对比例1剥离性能相对差,对比例2随着温湿度变化,剥离力变化很大;可知,本发明既提高了剥离性能,不残胶,也使得广告车身贴在环境影变化较大的情况下,剥离力几乎不变,剥离性能稳定,从而适合户外长时间使用,无需考虑更换广告车身贴即广告贴时出现的残胶现象,大大降低了广告贴及车身损伤的几率。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。

Claims (4)

1.一种广告车身贴的制备工艺,其特征在于:包括基材层、背胶层和离型层,所述基材层的一面上涂覆于背胶层,所述背胶层相背于基材层的一面设有离型层,所述背胶层由胶液涂覆烘干获得,此胶液通过以下步骤制得:
S1、将甲基丙烯酸甲酯20份、苯乙烯10份、丙烯酸丁酯15份、碳酸钠0.5份、六氯环三磷腈1份和去离子水60份混合均匀,升温至75~90℃,向该混合体系中滴加4,4'-偶氮双(4-氰基戊酸)0.5份和丙烯酸2份,反应3~5h;
S2、冷却至室温,加入异丙醇铝1份、固化剂3份、三聚甘油单硬脂酸酯0.2份和对苯二酚0.5份,混合均匀得到胶液;
S3、将胶液均匀涂覆于基材层上,烘干得到背胶层。
2. 根据权利要求1所述的广告车身贴的制备工艺,其特征在于:所述固化剂选自固化剂S01-5、固化剂 MH2844、固化剂T-31中的一种。
3.根据权利要求1所述的广告车身贴的制备工艺,其特征在于:所述基材层的厚度为70~120μm。
4.根据权利要求1所述的广告车身贴的制备工艺,其特征在于:还包括以下步骤:在S2步骤后:将胶液均匀涂覆于基材层上,烘干得到背胶层。
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