Film capable of changing color when encountering water

Abstract

The utility model discloses a film capable of changing color when encountering water, which belongs to the technical field of packaging films and comprises a printing base layer, and an ink layer, a functional layer and a material layer capable of changing color when encountering water, which are sequentially arranged on the printing base layer, and a bonding aid is arranged between the material layer capable of changing color when encountering water and the functional layer. The ink layer and the printing base layer are combined in a digital printing, intaglio printing, planographic printing or silk-screen printing mode. The functional layer is any one of a TPU (Thermoplastic Polyurethane) transparent film, a TPU waterproof breathable film or a TPU hot melt adhesive film, and the functional layer is arranged on the ink layer in an overprinting and overlapping manner. According to the structure, the problems that in an existing package, appearance diversity is difficult to achieve, the interactivity with consumers is low, the color changing effect is poor, the color changing effect is poor, the color changing effect is poor, the color changing effect is poor, the color changing effect is poor, and the like are solved. And the requirements of consumers on the aesthetic feeling of products are difficult to meet.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging films, in particular to a water-discoloring film. Background Art

[0002] With the rise of the Internet economy, various types of fast-moving consumer goods are becoming increasingly diversified. Today's consumers are paying more and more attention to consumption experience. Differentiated product marketing is gradually being valued by brand merchants. More and more users' purchasing tendencies are affected by the outer packaging of the desired goods. However, the outer packaging of products on the market is relatively simple, and monotonous TPU materials are widely used. However, it is currently difficult for TPU materials to achieve diversity in appearance, which affects the beauty of the product, making it difficult to attract consumers' attention at a glance and unable to meet consumers' experience requirements for daily products.

[0003] Therefore, it is necessary to provide a water-discoloring film to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a water-discoloring film to solve the problems of difficulty in achieving appearance diversity in current packaging, low interactivity with consumers, and difficulty in satisfying consumers' demands for product aesthetics.

[0005] To achieve the above-mentioned purpose, the utility model provides a water-chromic film, comprising a printing base layer and an ink layer, a functional layer and a water-chromic material layer sequentially arranged on the printing base layer, and an adhesive aid is arranged between the water-chromic material layer and the functional layer.

[0006] Preferably, a plurality of colorants are attached to the ink layer, and the ink layer is combined with the printing base layer by digital printing, gravure printing, lithographic printing or screen printing.

[0007] Preferably, the functional layer is any one of a TPU transparent film, a TPU waterproof breathable film or a TPU hot melt adhesive film, and the functional layer is arranged on the ink layer by overprinting.

[0008] Preferably, a UV absorber is added to the bonding aid.

[0009] Preferably, the water-chromic material layer is made by screen printing, and the water-chromic material layer is a PU layer, which is provided with a color-changing slurry and a color fixing agent, and the color fixing agent is cetylpyridinium bromide and / or cetylpyridinium chloride.

[0010] Therefore, the utility model adopts the above-mentioned water-discoloring film, which has the following beneficial effects:

[0011] (1) The utility model can select the functional layer according to the use requirements to meet the use requirements in different fields, but all of them have high impact resistance, large elongation, excellent tensile properties, and are environmentally friendly and non-toxic;

[0012] (2) The utility model utilizes a layer of material that changes color when exposed to water, which can increase the fun of using the product, thereby improving the interaction with consumers, attracting the attention of consumers, and increasing the diversity of the product packaging;

[0013] (3) The utility model adds an ultraviolet absorber to the bonding aid, which can increase the service life of the functional layer and prevent the effect of light on the color of the internal ink layer, so that the internal base color does not change color for a long time.

[0014] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a water-discoloring membrane of the utility model;

[0016] Notes

[0017] 1. Printing base layer; 2. Ink layer; 3. Functional layer; 4. Water-discoloring material layer; 5. Adhesive additive. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] As the instruction manual Figure 1 As shown, the utility model discloses a water-chromic film, comprising a printing base layer 1 and an ink layer 2, a functional layer 3 and a water-chromic material layer 4 arranged in sequence on the printing base layer 1, and an adhesive auxiliary agent 5 is arranged between the water-chromic material layer 4 and the functional layer 3.

[0021] The ink layer 2 has a plurality of colorants attached therein, which serve as a base color to make the color of the package more layered. The ink layer 2 is combined with the printing base layer 1 by digital printing, gravure printing, offset printing or screen printing.

[0022] The functional layer 3 is any one of TPU transparent film, TPU waterproof breathable film or TPU hot melt adhesive film. TPU transparent film, TPU waterproof breathable film and TPU hot melt adhesive film have their own characteristics and meet the use requirements in different fields. The functional layer 3 is arranged on the ink layer by overprinting.

[0023] The adhesive auxiliary agent 5 contains an ultraviolet absorber, which can increase the service life of the functional layer and prevent the light from affecting the color of the internal ink layer, so that the internal base color does not change color for a long time.

[0024] The water-chromic material layer 4 is made by screen printing. The water-chromic material layer 4 is a PU layer, which is provided with a color-changing slurry and a color fixing agent. The color fixing agent is cetylpyridinium bromide and / or cetylpyridinium chloride.

[0025] Example 1

[0026] A water-chromic film is provided with a printing base layer 1, an ink layer 2, a TPU waterproof breathable film, an adhesive auxiliary agent 5 and a water-chromic material layer 4 in sequence, wherein the colorant in the ink layer 2 is bromocresol green, and the ultraviolet absorber in the adhesive auxiliary agent 5 is a benzophenone-type light stabilizer. The packaging film has high water pressure resistance, high moisture permeability, good hand feel, and is resistant to water washing and dry cleaning, and meets the production needs of clothing and shoe fabric bonding.

[0027] Example 2

[0028] A water-chromic film is provided with a printing base layer 1, an ink layer 2, a TPU transparent film, an adhesive auxiliary agent 5 and a water-chromic material layer 4 in sequence, wherein the colorant in the ink layer 2 is bromochlorophenol blue Congo red, and the ultraviolet absorber in the adhesive auxiliary agent 5 is a benzophenone-type light stabilizer. The packaging film has strong air permeability and moisture permeability, low compression deformation, and high elasticity, and meets the use requirements of outer packaging of luggage, handbags, clothing, and toys.

[0029] Therefore, the utility model adopts a water-discoloring film of the above structure to solve the problems of difficulty in achieving appearance diversity in current packaging, low interactivity with consumers, and difficulty in meeting consumers' demands for product aesthetics.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A water-discoloring film, characterized in that: The invention comprises a printing base layer and an ink layer, a functional layer and a water-chromic material layer which are sequentially arranged on the printing base layer, wherein a bonding auxiliary agent is arranged between the water-chromic material layer and the functional layer.

2. The water-discoloring film according to claim 1, characterized in that: A plurality of colorants are attached to the ink layer, and the ink layer is combined with the printing base layer by digital printing, gravure printing, flat printing or screen printing.

3. The water-discoloring film according to claim 1, characterized in that: The functional layer is any one of a TPU transparent film, a TPU waterproof breathable film or a TPU hot melt adhesive film, and the functional layer is arranged on the ink layer by overprinting.

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