Color-changing glue, color-changing glue film and preparation method of color-changing glue film

Abstract

The invention relates to color-changing glue, a color-changing glue film and a preparation method of the color-changing glue film. The color-changing glue is prepared from the following raw materialsin parts by mass: 20-40 parts of a host material, 20-50 parts of a first auxiliary material, 1-10 parts of guest molecules and 40-60 parts of a solvent, wherein the host material is a polymer materialhaving a weight-average molecular weight higher than 10,000 and having a triangular oxygen-containing functional group or a tetragonal plane oxygen-containing functional group, the first auxiliary material is a carboxyl group-containing viscous material, and the guest molecule is elemental iodine. After the color-changing glue film prepared from the color-changing glue is used for paper packaging, the color-changing process can be used for indicating the time process, and then the product quality is indicated.

Description

technical field [0001] 本发明涉及胶水及胶膜领域,尤其涉及一种变色胶水、变色胶膜及变色胶膜制备方法。 Background technique [0002] 胶水被广泛应用于包装领域,但现有的胶水功能单一,仅仅起到胶粘的作用,不具备变色计时功能,为了使包装具备变色计时效果,往往通过额外贴附计时标签的方式来实现,导致包装成本的增加。 [0003] 任何产品都有保质期,特别是食品和药品,需在特定的时间内食用或使用,否则将给人体带来伤害,现有技术往往是通过在包装上喷墨打印生产日期,消费者结合使用日期判断食品或药品是否过期,然而,喷墨打印的生产日期往往不够明显,难以快速找到,特别是对一些视力不佳的老年人,更是难以辨识。 [0004] 目前,市场上存在一种时间指示标签,激活后其指示区域可与空气发生变色反应,从而通过颜色变化指示时间进程,然而,该类标签稳定性差,其变色速率受空气流动速率影响,指示误差较大。 Contents of the invention [0005] 基于此,有必要提供一种易于识别且稳定的计时变色胶水及变色胶膜。 [0006] 此外,还提供一种变色胶膜的制备方法。 [0007] 一种变色胶水,以质量份计,制备所述变色胶水的原料包括: [0008] [0009] 其中,所述主体材料为重均分子量高于10000且具有三角含氧官能团或四方平面含氧官能团的高分子材料,所述第一辅助材料为含有羧基的粘性材料,所述客体分子为碘单质。 [0010] 在一个实施方式中,所述三角含氧官能团为醛基,所述四方平面含氧官能团为乙酸酯基。 [0011] 在一个实施方式中,所述主体材料选自聚乙烯醇缩丁醛、聚乙烯醇、尼龙、聚乙烯吡咯烷酮、羟乙基纤维素、淀粉及羟丙基纤维素中的至少一种。 [0012] 在一个实施方式中,所述第一辅助材料选自丙烯酸树脂及聚氨酯中的至少一种。 [0013] 在一个实施方式中,还包括5份~10份第二辅助材料,所述第二辅助材料为含有羧基的烷烃衍生物。 [0014] 在一个实施例中,所述第二辅助材料选自桐油、亚麻油、油酸、反油酸、蓖麻油、棕榈酸、棕榈酸酯、月桂酸、豆蔻酸、二十八烷、硬脂酸、软脂酸、硬脂酸甘油酯、硬脂酸甲酯、硬脂酸乙酯、花生酸及松香树脂...

AI Technical Summary

Problems solved by technology

[0002] Glue is widely used in the packaging field, but the existing glue has a single function, which only plays the role of gluing, and does not have the function of changing color and timing. In order to make the packaging have the effect of changing color and timing, it is often achieved by attaching an additional timing label. lead to an increase in packaging costs

[0003] Any product has a shelf life, especially food and medicine, which need to be eaten or used within a specific time, otherwise it will cause harm to the human body. The existing technology often prints the production date on the package by inkjet, and the consumer combines the date of use Judging whether food or medicine has expired, however, the production date of inkjet printing is often not obvious enough to find it quickly, especially for some elderly people with poor eyesight

[0004] At present, there is a time indicating label on the market. After activation, its indicating area can change color with air, thereby indicating the time course through color change. However, this type of label has poor stability, and its color changing rate is affected by the air flow rate, indicating error larger

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