CN109334185A - 一种耐温具有金属光泽亮膜的制备方法 - Google Patents

一种耐温具有金属光泽亮膜的制备方法 Download PDF

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CN109334185A
CN109334185A CN201811379401.7A CN201811379401A CN109334185A CN 109334185 A CN109334185 A CN 109334185A CN 201811379401 A CN201811379401 A CN 201811379401A CN 109334185 A CN109334185 A CN 109334185A
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黄斗兴
曹慧芬
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Shanghai HongDun Anti-Counterfeit Material Co Ltd
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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    • B32B38/00—Ancillary operations in connection with laminating processes
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Abstract

本发明涉及一种耐温具有金属光泽亮膜的制备方法，包括步骤：选用基材PVC/PET薄膜，通过复合方式，在PVC/PET薄膜上面转移一层真空镀铝层，复合好的膜经过50℃，24‑48小时的放置熟化，使复合胶内的树脂和铝完全反应后再剥离开，最后，在铝层面上表面施工一层亮光UV保护涂层，该涂层在UV光照射时间1‑3秒，涂层厚度2‑20um。本发明可以有效的解决铝层与树脂的结合力问题，树脂或涂料的选择空间比较大，也不用在基膜上面打底。同时该制作的金属光泽的亮膜具有耐温性柔韧性等特点，可以替代金属软包，用于防金属光泽的软包装中。此外，本发明的制作方法成本低，制作工艺简单，还能满足装饰使用的性能要求，易于推广使用。

Description

一种耐温具有金属光泽亮膜的制备方法
[技术领域]
本发明涉及建材装饰膜技术领域，具体地说是一种耐温具有金属光泽亮膜的制备方法。
[背景技术]
目前，无论PVC还是PET的镀铝膜应用广泛，但是直镀膜结合力差，为了提高结合力，需要先做打底层，这样不但施工麻烦而且大大增加了成本。
现有的真空镀膜技术虽然成熟但是基膜和铝的结合力不好，后期使用使容易色铝分层，如果想提高结合力需要在基膜上面先打底，涂布一层树脂层，在涂布树脂层的过程中膜容易变形，尤其是PVC膜变形比较大，直接涂覆在PVC上面，经过烘箱容易遭成膜变形或者被拉伸。增加工序损耗也容易产生，故造成成本较高。直镀膜为了防止铝层划伤，需要再增加保护层。该保护层也需要选择和铝结合力好的保护层，能够满足使用的保护层较少，推广性差。后期薄膜需要复合加工还需要考虑耐温、柔韧性、附着力、粘结性等一系列问题。
[发明内容]
本发明的目的就是要解决上述的不足而提供一种耐温具有金属光泽亮膜的制备方法。既能解决铝层的结合力的问题也不用在基膜上面打底。同时该制作的金属光泽的亮膜具有耐温性柔韧性等特点，可以替代金属软包，用于防金属光泽的软包装中。
为实现上述目的设计一种耐温具有金属光泽亮膜的制备方法，其特征在于，包括以下步骤：
(1)选用基材PVC/PET薄膜，厚度50-300um；
(2)通过复合方式，在PVC/PET薄膜上面转移一层真空镀铝层，所述真空镀铝层制备方法：在转移的BOPP薄膜上面真镀一层铝，在铝表面涂覆复合胶，然后和PVC/PET薄膜复合，复合胶层厚度：6-20um，烘烤温度：80-120℃，放置一段时间后剥离，该BOPP薄膜上的铝层通过复合胶转移到PVC/PET薄膜上面；
(3)复合好的膜经过50℃，24-48小时的放置熟化，使复合胶内的树脂和铝完全反应后再剥离开，剥离后PVC/PET膜上面转移含有金属光泽的铝层，铝层厚度：300-600埃；
(4)最后，在铝层面上表面施工一层亮光UV保护涂层，最后，在铝层面上表面施工一层亮光UV保护涂层，该涂层在UV光照射时间1-3秒，涂层厚度2-20um。
所述步骤(2)中，复合胶的组分按重量比：聚氨酯的多元醇混合物20-35％、异氰酸酯固化剂5-10％、含水量小于300ppm的乙酸乙酯20-35％、含水量小于300ppm的乙酸丁酯10-30％、含水量小于300ppm的丁酮或丙酮20-35％及含水量小于300ppm的环己酮10-25％，混合后总量搅拌时间0.5-1h，室温25℃，粘度15-40S。
所述步骤(4)中，UV保护涂层采用环氧树脂、脂肪族聚氨酯树脂或改性的酚醛树脂。
本发明同现有技术相比，可以有效的解决铝层与树脂的结合力问题，树脂或涂料的选择空间比较大，也不用在基膜上面打底。同时该制作的金属光泽的亮膜具有耐温性柔韧性等特点，可以替代金属软包，用于防金属光泽的软包装中。此外，本发明的制作方法成本低，制作工艺简单，还能满足装饰使用的性能要求，易于推广使用。
[具体实施方式]
本发明自下而上的结构：PVC聚氯乙烯/PET聚酯薄膜、复合胶层、铝层及保护层。本发明的制备方法，包括以下步骤：
(1)选用基材PVC/PET薄膜，厚度50-300um；
(2)通过复合方式，在PVC/PET薄膜上面转移一层真空镀铝层，所述真空镀铝层制备方法：在转移的BOPP薄膜上面真镀一层铝，在铝表面涂覆复合胶，然后和PVC/PET薄膜复合，复合胶层厚度：6-20um，烘烤温度：80-120℃，放置一段时间后剥离，该BOPP薄膜上的铝层通过复合胶转移到PVC/PET薄膜上面；转移后的BOPP薄膜剥离可以继续镀铝循环使用，止到表面有损伤或出现永久污点。通过该复合方法可以使粘合剂和铝通过化学反应粘合在一起，很好地解决了铝层和涂层的结合力。并且PVC/PET薄膜不用经过烘箱，减少了原膜的变形。
(3)复合好的膜经过50℃，24-48小时的放置熟化，使复合胶内的树脂和铝完全反应后再剥离开，剥离后PVC/PET膜上面转移含有金属光泽的铝层，铝层厚度：300-600埃；
(4)最后，在铝层面上表面施工一层亮光UV保护涂层，该涂层可以有效保护金属表面，该UV保护涂层主体结构可以是环氧树脂、脂肪族聚氨酯树脂、改性的酚醛树脂等。树脂的选择可以使油性也可以选择水性。在UV光照单体树脂与主体树脂在引发剂的作用下能够完全交联反应。涂层厚度2-20um，通常厚度偏厚膜的刚性和强度增加，但其柔韧性降低。UV灯管照射时间1-3秒，能固化即可，如果照射时间太长膜发生变形或黄变。
所述步骤(2)中，复合胶是耐高温的复合粘合剂，该粘合剂的组分按重量比：聚氨酯的多元醇混合物20-35％、异氰酸酯固化剂5-10％、含水量小于300ppm的乙酸乙酯20-35％、含水量小于300ppm的乙酸丁酯10-30％、含水量小于300ppm的丁酮或丙酮20-35％及含水量小于300ppm的环己酮10-25％，混合后总量搅拌时间0.5-1h，室温25℃，粘度15-40S(涂4杯)。复合胶黏剂涂覆干膜厚度：6-20um；一般PVC表面粗糙度低涂覆胶水厚度就薄，PVC表面粗糙胶水就厚，以复合后铝层能够完全转移为标准。其中固化剂的比例越高刚性越好，柔韧性越差。
本发明并不受上述实施方式的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。

Claims (3)

1.一种耐温具有金属光泽亮膜的制备方法，其特征在于，包括以下步骤：
(1)选用基材PVC/PET薄膜，厚度50-300um；
(2)通过复合方式，在PVC/PET薄膜上面转移一层真空镀铝层，所述真空镀铝层制备方法：在转移的BOPP薄膜上面真镀一层铝，在铝表面涂覆复合胶，然后和PVC/PET薄膜复合，复合胶层厚度：6-20um，烘烤温度：80-120℃，放置一段时间后剥离，该BOPP薄膜上的铝层通过复合胶转移到PVC/PET薄膜上面；
(3)复合好的膜经过50℃，24-48小时的放置熟化，使复合胶内的树脂和铝完全反应后再剥离开，剥离后PVC/PET膜上面转移含有金属光泽的铝层，铝层厚度：300-600埃；
(4)最后，在铝层面上表面施工一层亮光UV保护涂层，该涂层在UV光照射时间1-3秒，涂层厚度2-20um。
2.如权利要求1所述的制备方法，其特征在于，所述步骤(2)中，复合胶的组分按重量比：聚氨酯的多元醇混合物20-35％、异氰酸酯固化剂5-10％、含水量小于300ppm的乙酸乙酯20-35％、含水量小于300ppm的乙酸丁酯10-30％、含水量小于300ppm的丁酮或丙酮20-35％及含水量小于300ppm的环己酮10-25％，混合后总量搅拌时间0.5-1h，室温25℃，粘度15-40S。
3.如权利要求1所述的制备方法，其特征在于，所述步骤(4)中，UV保护涂层采用环氧树脂、脂肪族聚氨酯树脂或改性的酚醛树脂。
CN201811379401.7A 2018-11-19 2018-11-19 一种耐温具有金属光泽亮膜的制备方法 Pending CN109334185A (zh)

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