CN216697638U

CN216697638U - Cold-ironing color-changing film

Info

Publication number: CN216697638U
Application number: CN202122778151.8U
Authority: CN
Inventors: 刘海龙; 李小军; 林桂礼; 任金雁
Original assignee: Shenzhen Kun Hong Technology Co ltd
Current assignee: Shenzhen Kun Hong Technology Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-06-07
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a cold wave color-changing film, which comprises an inorganic polymer film layer, a release layer, an imaging layer, an aluminized layer and a protective layer which are sequentially stacked, wherein a corrosion-resistant layer is also arranged between the imaging layer and the release layer; the imaging layer comprises an acrylic layer and a holographic pattern layer, the holographic pattern layer is printed on the surface of the acrylic layer, which faces away from the corrosion-resistant layer, a fluorescent layer is arranged between the imaging layer and the aluminum-plated layer, and the fluorescent layer is arranged between the acrylic layer and the holographic pattern layer. The technical scheme of the utility model has the advantages of low processing cost, wide application range of base materials such as white cardboard, gold and silver cardboard, composite film cardboard, film, label heat-sensitive material and the like, capability of hot stamping lines, dots, characters, fields and the like, diversified color display, capability of perfectly reflecting the gradual change effect and strong layering.

Description

Cold-ironing color-changing film

Technical Field

The utility model relates to the technical field of cold wave films, in particular to a cold wave color-changing film.

Background

At present, the laser holographic pattern has the characteristics of clear and vivid image, strong two-dimensional and three-dimensional spatial sense, encryption, difficulty in copying and imitating, disposable use and the like, is widely applied to various composite packaging materials and decorative materials, forms various laser holographic composite packaging materials and decorative materials, and is particularly widely applied to anti-counterfeiting composite packaging and decorative materials. The holographic cold-wave film is made by using transfer method to strip off the plastic film and transfer the holographic pattern layer to the required article, so that the article has good visual effect. The existing holographic pattern cold stamping film can present gorgeous metal luster under the action of light rays, the metal texture can be realized only under the irradiation of strong external light, and if the metal luster of the gold stamping pattern is realized at a darker place, the functional layer of the traditional alumite gold stamping foil part needs to be correspondingly improved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a cold stamping color-changing film, and aims to provide a cold stamping color-changing film which is rich in colors, high in hot stamping speed and good in hot stamping effect.

In order to achieve the purpose, the cold wave color-changing film provided by the utility model comprises an inorganic polymer film layer, a release layer, an imaging layer, an aluminum-plated layer and a protective layer which are sequentially stacked, wherein a corrosion-resistant layer is arranged between the imaging layer and the release layer; the imaging layer comprises an acrylic layer and a holographic pattern layer, the holographic pattern layer is printed on the surface of the acrylic layer, which faces away from the corrosion-resistant layer, a fluorescent layer is arranged between the imaging layer and the aluminum-plated layer, and the fluorescent layer is arranged between the acrylic layer and the holographic pattern layer.

Preferably, the thickness of the fluorescent layer is between 1 and 20 microns.

Preferably, the material of the fluorescent layer is organic fluorescent powder or inorganic fluorescent powder.

Preferably, the fluorescent layer is adhesively fixed to the face layer of the imaging layer by a coating printing process.

Preferably, the corrosion-resistant layer is made of one of phenolic resin, polyurethane resin, polytetrafluoroethylene and carbon fiber.

Preferably, the imaging layer is made of resin material cured by ultraviolet irradiation or molded.

Preferably, the inorganic polymer film layer is provided as a nylon/polyester film.

According to the cold stamping color-changing film, the fluorescent layer is additionally arranged between the imaging layer and the aluminum-plated layer, the fluorescent layer is excited by weak light to generate strong light with a certain frequency, and light is reflected by the surface of the aluminum layer, so that a stamping effect of excellent metallic luster can be realized under the weak light. The cold-stamping color-changing film can overcome the defect that the traditional alumite and gold-stamping products thereof can only show metallic luster under the action of strong light, and show excellent metallic luster under a weaker light source, greatly reduces the use conditions of the alumite and gold-stamping products thereof, and can be introduced in some special fields, such as traffic reflective signs, safety indicators and the like, and the cold-stamping color-changing film can be widely applied to substrates such as white cardboard, gold and silver cardboard, compound film cardboard, films, label thermosensitive materials and the like, lines, dots, characters, fields and the like can be simultaneously stamped, the gradual change effect can be perfectly reflected, and the layering sense is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a cold wave color-changing film according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another embodiment of the cold wave color-changing film.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions relating to "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

At present, the laser holographic pattern has the characteristics of clear and vivid image, strong two-dimensional and three-dimensional spatial sense, encryption, difficulty in copying and imitating, disposable use and the like, is widely applied to various composite packaging materials and decorative materials, forms various laser holographic composite packaging materials and decorative materials, and is particularly widely applied to anti-counterfeiting composite packaging and decorative materials. The holographic cold-wave film is made by using transfer method to strip off the plastic film and transfer the holographic pattern layer to the required article, so that the article has good visual effect. The existing holographic pattern cold stamping film can present gorgeous metal luster under the action of light, the metal texture can be realized only under the irradiation of external strong light, and if the metal luster of the gold stamping pattern is realized at a darker place, the functional layer of the traditional alumite gold stamping foil part must be correspondingly improved.

The utility model provides a cold wave color-changing film.

Referring to fig. 1 to 2, in the embodiment of the present invention, the cold wave color-changing film 10 includes an inorganic polymer film layer 1, a release layer 2, an imaging layer 4, an aluminum plating layer 6, and a protective layer 7, which are sequentially stacked, and a corrosion-resistant layer 3 is further disposed between the imaging layer 4 and the release layer 2; the imaging layer 4 comprises an acrylic layer 41 and a holographic pattern layer 42, the holographic pattern layer 42 is printed on the surface of the acrylic layer 41, which faces away from the corrosion-resistant layer 3, a fluorescent layer 5 is arranged between the imaging layer 4 and the aluminum-plated layer 6, and the fluorescent layer 5 is arranged between the acrylic layer 41 and the holographic pattern layer 42.

The inorganic polymer film layer 1 is used as a carrier for manufacturing the whole gold stamping film and transmitting information, and is required to have higher tensile strength and better wetting property so as to ensure the uniformity and the leveling property of the release layer 2 coated on the inorganic polymer film layer 1. The release layer 2 is used as an isolation layer between each functional layer and the substrate film, is required to be quickly separated in the cold-stamping pad printing process, and has no adhesive force to the inorganic polymer film layer 1, so that the effect of separating different gold-stamping patterns from the substrate is realized. The imaging layer 4 is as the key of the gilt foil color development of electrification aluminium, uses the higher coating of luminousness when requiring preparation imaging layer 4 to reduce the weakening to the light that sees through, require this kind of coating viscosity moderate, leveling nature good simultaneously, so that obtain comparatively homogeneous dry coating volume and coating thickness during the coating operation. The fluorescent layer 5 as the cold wave color-changing film 10 can realize the key of metallic luster under the condition of weak light, and the fluorescent layer 5 is required to have excellent light absorption performance and better fluorescent performance so as to be beneficial to realizing stronger metallic luster under the condition of weak light. The aluminized layer 6 is mainly characterized by having both sides smooth as mirrors for reflecting incident light, which is also a source of the strong metallic feeling of the cold wave discoloring film 10.

Specifically, the inorganic polymer film layer 1 is a polyethylene terephthalate (PET) inorganic polymer film layer 1, the PET film is made of polyethylene terephthalate as a raw material, and the PET film has good mechanical properties, impact strength 3-5 times that of other films, and good folding resistance. The PET film is made into a thick sheet by an extrusion method, and then the thin film material is made by biaxial stretching, so that the PET film has good transparency and air tightness, and the definition of the thin film in the inorganic polymer film layer 1 means that when the thickness of the inorganic polymer film layer 1 is compared with the area of the inorganic polymer film layer 1, the thickness value of the inorganic polymer film layer 1 is smaller, and the pattern of the imaging layer 4 can be displayed without obstruction. The release layer 2 is formed by a release agent, and is used for preventing the formed inorganic polymer film layer 1 and the imaging layer 4 from being adhered to each other, and the release layer 2 can be a film, a paste or a wax according to different states of the release agent. The imaging layer 4 is the most important coating of the cold wave film, and determines the main properties of the cold wave film, such as color, brightness, edge cutting property, flexibility, high temperature resistance, corrosion resistance and the like. The aluminizing layer 6 is aluminized on the imaging layer 4 by adopting a vacuum aluminizing method, and has the functions of enabling the membrane to emit flashing metal luster and enabling the color layer to be brightened and splendid, which is the effect pursued by the bronzing. The protective layer 7 is a holographic pattern protective layer 7, which can ensure the integrity of the transferred holographic pattern after being transferred to the target object, thereby enhancing the effects of beauty, durability and the like of the transferred holographic pattern. When the cold wave color-changing film 10 is subjected to cold wave transfer, a glue layer is coated on the surface of the protective layer 7. Meanwhile, the corrosion-resistant layer 3 is arranged between the imaging layer 4 and the release layer 2 to protect the imaging layer 4, so that the imaging layer 4 is effectively prevented from being aged and faded due to corrosion of moisture and acidic substances in the environment, the patterns of the imaging layer 4 can be kept complete and high in definition, and the display effect of the cold-wave film is finally improved.

The cold-wave color-changing film 10 in the technical scheme of the utility model is suitable for a cold-wave process and can completely replace the traditional hot-wave process. The cold stamping color-changing film 10 is molded on the imaging layer 4 to form the complete pattern layer 42, so that the transfer can be carried out at normal temperature, heating is not required, the processing cost is low, a metal stamping plate is not required to be manufactured, a precoated photosensitive plate (PS plate) is adopted, the plate making period is short, and the cost is low. According to the cold stamping color-changing film 10, the fluorescent layer 5 is additionally arranged between the imaging layer 4 and the aluminum-plated layer 6, the fluorescent layer 5 is excited by weak light to generate strong light with a certain frequency, and light is reflected by the surface of the aluminum layer, so that a stamping effect with excellent metallic luster can be realized under the weak light. The cold-stamping color-changing film 10 can overcome the defect that the traditional alumite and gold-stamping products thereof can only show metallic luster under the action of strong light, and show excellent metallic luster under a weaker light source, so that the use conditions of the alumite and gold-stamping products thereof are greatly reduced, and even in certain special fields, such as traffic reflective signs, safety indicators and the like, the cold-stamping color-changing film 10 can be introduced, and the cold-stamping color-changing film 10 can be widely applied to substrates such as white cardboard, gold and silver cardboard, compound cardboard, films, label thermosensitive materials and the like, lines, dots, characters, fields and the like can be simultaneously stamped, the gradual change effect can be perfectly embodied, and the layering sense is strong.

Optionally, the thickness of the fluorescent layer 5 is between 1 and 20 μm. After absorbing the energy of ultraviolet light or infrared light, the fluorescent material can quickly release energy and show a bright color fluorescent effect. When the light source is removed, the light emission is stopped immediately, and the original invisible state is recovered. The thickness is set in such a way that, on the one hand, the phosphor particles themselves have a certain thickness, since the phosphor layer 5 has to be provided with phosphor particles, and, on the other hand, the brightness of the phosphor layer 5 is also ensured.

Optionally, in an embodiment, the material of the fluorescent layer 5 is organic phosphor or inorganic phosphor. The organic anti-counterfeiting fluorescent powder has the diameter of 1-10 mu m and the water content less than or equal to 3 percent. The organic anti-counterfeiting fluorescent powder is a dye, and can achieve the effect of complete light transmission after being dissolved in a proper solvent; good luminous effect and low addition amount. It is suitable for ink, paint and plastic injection and extrusion. The base material is transparent resin, and the concentration of the base material is adjusted according to the processing mode and the thickness of the coating. The organic anti-counterfeiting fluorescent powder can be dissolved by solvent, has different solubility according to different solvent types, and is mixed into the ink according to proper proportion after being dissolved, and the organic anti-counterfeiting fluorescent powder can be applied to: screen printing, lithographic printing, intaglio printing, relief printing, pad printing, painting, spray painting …, etc. In addition, the fluorescent material can be injected and extruded with various types of plastics such as: PP, PE, PVC, PU, PS, ABS, TPR, EVA, nylon, acryl and the like, and the temperature is prevented from exceeding 240 ℃ during injection. When the fluorescent material is used for plastic injection or extrusion, color master batches are preferably used, the dispersion is more uniform, the color master batches are required to be fully dried before use, and if anti-counterfeiting fluorescent powder is required to be directly used, the anti-counterfeiting fluorescent powder, the auxiliary agent and the additive are firstly mixed and stirred uniformly and then added into the plastic material, so that the pigment and the anti-counterfeiting fluorescent powder can be more uniformly combined with the plastic.

Optionally, the fluorescent layer 5 is adhesively fixed to the layer surface of the imaging layer 4 by a coating printing process.

Optionally, the corrosion-resistant layer 3 is made of one of phenolic resin, polyurethane resin, polytetrafluoroethylene, and carbon fiber.

Optionally, the corrosion-resistant layer 3 has a thickness of 0.5 μm to 10 μm. The thickness of the corrosion-resistant layer 3 is suitably selected, for example, by using a thickness of the corrosion-resistant layer 3 of 0.5 μm, or 3 μm, or 6 μm, or 8 μm, or 10 μm. If the thickness of the corrosion-resistant layer 3 is less than 0.5 μm, the corrosion-resistant effect is not significant, or the corrosion-resistant effect is gradually eliminated as the service life is prolonged; if the thickness of the corrosion-resistant layer 3 is greater than 10 μm, the display effect of the cold-wave corrosion-resistant film is impaired, and the cost is increased, resulting in waste of resources.

Optionally, the corrosion-resistant layer 3 is made of at least one of phenolic resin, polyurethane resin, polytetrafluoroethylene, and carbon fiber. The materials of phenolic resin, polyurethane resin, polytetrafluoroethylene and carbon fiber have better corrosion resistance. Among them, the coating film made of phenolic resin is bright and tough, and has good durability, water resistance and acid resistance, and therefore, the corrosion-resistant layer 3 is generally made of phenolic resin. In the preparation process, the phenolic resin and the dry vegetable oil are boiled and then added with a catalyst, a solvent and the like to prepare the varnish. The corrosion layer is adhered and fixed on the surface of the imaging layer 4 by an air spraying process, because the phenolic resin is firstly prepared into varnish liquid and then prepared into the corrosion-resistant layer 3, in order to uniformly coat the liquid corrosion-resistant layer 3 between the imaging layer 4 and the release layer 2, the corrosion-resistant layer 3 is usually coated by the air spraying process. The specific working principle of the air spraying process is as follows: the air flow of compressed air is utilized to flow through the nozzle hole of the spray gun to form negative pressure, the acrylic varnish or organic silicon varnish is sucked from the suction pipe by the negative pressure and is sprayed out through the nozzle to form paint mist, and the paint mist is sprayed onto the surface of the imaging layer 4 to form the uniform corrosion-resistant layer 3.

Alternatively, the imaging layer 4 is made of a resin material cured by ultraviolet irradiation or molded.

In one embodiment, the imaging layer 4 includes an acrylic layer 41 and a holographic pattern layer 42, the holographic pattern layer 42 being printed on a surface of the acrylic layer 41 facing away from the corrosion-resistant layer 3. The holographic pattern layer 42 is stamped on the acrylic acid layer, so that the combination degree of the holographic pattern is firmer, the holographic pattern is clearer in the hot stamping process, no burr is arranged on the periphery of the holographic pattern in the hot stamping process, the hot stamping precision is higher, and the effect is better. The holographic pattern may be one or a combination of a laser pattern, a rainbow pattern and a grating pattern, or may be a laser anti-counterfeiting pattern, so as to improve the anti-counterfeiting effect of the imaging layer 4. In order to enhance the fixing strength between the imaging layer 4 and the aluminum plated layer 6, the imaging layer 4 is made of a resin material by Ultraviolet (UV) curing or molding. The UV curing means an ultraviolet light curing process, and the embossing means fixing the image forming layer 4 by heating and pressing. The imaging layer 4 can be bonded and fixed on the aluminum coating 6 by the ultraviolet light curing process, and the gap between the imaging layer 4 and the aluminum coating 6 can be further reduced by the mould pressing process, so that the fixing strength of the imaging layer 4 is improved.

Alternatively, for the convenience of the transfer process, in one embodiment, the inorganic polymer film layer 1 is provided as a nylon polyester film. The nylon polyester fiber film does not deform due to temperature rise, and has the performances of high strength, tensile strength, high temperature resistance and the like.

In addition, the cold hot stamping process mainly comprises multicolor printing of products, adhesive printing, proper drying, cold hot stamping, composite protective layers and the like. The principle is that the adhesive is printed on the printing stock in advance, and the part (namely the image-text part) required by the cold stamping type alumite is transferred to the surface of the printing stock under the action of pressure through the adhesive property of the adhesive to form the image-text, so that the hot stamping quality of the product is improved. The common process steps of cold gold stamping are generally as follows: first, printing U V ink. After drying, printing a special adhesive, namely a UV curing adhesive on the part of the ink surface needing gold stamping; then removing the moisture of the adhesive to a certain degree by a UV drying device to form a high-viscosity very thin pressure-sensitive adhesive layer; and starting cold hot stamping, and enabling the aluminum foil to be tightly contacted with the adhesive and pressed into a whole under the pressure action of a pair of metal rollers. Because the adhesive has large bonding force with the aluminum foil, the contact part of the aluminum foil and the adhesive is left on the surface of a printing stock of a printing product to form a preset image and text when waste is discharged, and other parts of the aluminum foil are discharged as the traditional hot stamping.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The cold-wave color-changing film is characterized by comprising an inorganic polymer film layer, a release layer, an imaging layer, an aluminum-plated layer and a protective layer which are sequentially stacked, wherein a corrosion-resistant layer is arranged between the imaging layer and the release layer; the imaging layer comprises an acrylic layer and a holographic pattern layer, the holographic pattern layer is printed on the surface of the acrylic layer, which faces away from the corrosion-resistant layer, a fluorescent layer is arranged between the imaging layer and the aluminum-plated layer, and the fluorescent layer is arranged between the acrylic layer and the holographic pattern layer.

2. The cold wave color-changing film according to claim 1, wherein the thickness of the fluorescent layer is between 1 and 20 μm.

3. The cold wave color-changing film according to claim 2, wherein the fluorescent layer is made of organic phosphor or inorganic phosphor.

4. A cold-wave color shifting film according to claim 2, wherein the phosphor layer is adhesively secured to the imaging layer face by a coating printing process.

5. The cold wave color-changing film according to claim 1, wherein the corrosion-resistant layer is made of one of phenolic resin, polyurethane resin, polytetrafluoroethylene and carbon fiber.

6. A coldperm color shifting film according to claim 1, wherein the imaging layer is made of a resin material cured by uv irradiation or molded.

7. The cold wave color changing film according to claim 1, wherein the inorganic polymer film layer is a nylon polyester filament film.