Cooling ice cool heat transfer printing film

Abstract

The utility model discloses a cooling ice cool heat transfer printing film relates to heat transfer printing film technical field, including base material layer, the downside of base material layer is from top to bottom is provided with release layer, function layer, pattern layer and adhesive layer in proper order, the base material layer, release layer, function layer, pattern layer and adhesive layer are closely combined through coating and composite technology, and each layer is closely combined through coating and composite technology, and the integrity of heat transfer printing film and reliability in the use process are ensured, the function layer is the composite material layer including phase change microcapsule, the wall material of phase change microcapsule is melamine - formaldehyde resin, the inside of function layer is evenly distributed with heat conducting filler, the thickness of function layer is 10um to 50um, the heat conducting filler is boron nitride or aluminium oxide, can realize pattern decorative transfer while giving the durable cooling ice cool function of printing material.

Description

Technical Field

[0001] This utility model relates to the field of heat transfer film technology, specifically a cooling heat transfer film. Background Technology

[0002] Heat transfer film is a decorative material that uses heat and pressure to transfer a pre-made pattern from a carrier film to the surface of a substrate (such as textiles, plastic products, etc.). Its basic structure typically includes a substrate layer as support, a release layer for separation, a pattern layer that carries the decorative effect, and an adhesive layer for bonding. Heat transfer technology can efficiently and firmly attach complex and exquisite patterns to products of various materials, greatly enriching product design. This technology is widely used in clothing, footwear, bags, and many other fields due to its ease of operation, high efficiency, and good pattern durability. However, traditional heat transfer films have relatively limited functions, mainly focusing on the decorative transfer of patterns, which is insufficient to meet the growing market demand for additional functions in textiles. Especially in the fields of summer clothing and sportswear, consumers are increasingly demanding greater comfort, hoping that products will not only be aesthetically pleasing but also have a real physical cooling effect to enhance the feeling of coolness. Some existing technologies attempt to impart a cooling function to fabrics through finishing processes or by adding cooling fibers, but these methods often suffer from problems such as complex processes, high costs, altered hand feel, and insufficient durability. Therefore, we propose a cooling heat transfer film. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a cooling heat transfer film that can give the substrate a lasting cooling function while realizing the decorative transfer of patterns, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cooling heat transfer film, comprising a substrate layer, wherein a release layer, a functional layer, a pattern layer and an adhesive layer are sequentially disposed on the lower side of the substrate layer from top to bottom. The substrate layer, release layer, functional layer, pattern layer and adhesive layer are tightly bonded together by coating and lamination processes. Each layer is tightly bonded together by coating and lamination processes, ensuring the integrity of the transfer film and its reliability during use.

[0005] Furthermore, the functional layer is a composite material layer containing phase change microcapsules. The wall material of the phase change microcapsules is melamine-formaldehyde resin. Thermally conductive fillers are uniformly distributed inside the functional layer. The thickness of the functional layer is 10μm to 50μm. The thermally conductive fillers are boron nitride or aluminum oxide. The phase change microcapsules can undergo phase changes, such as solid-to-liquid transitions, at specific temperatures, absorbing and storing heat to produce a lasting cooling sensation. The thermally conductive fillers can quickly conduct heat from the skin to the interior of the functional layer, improving cooling efficiency. The specific thickness range ensures that the functional layer has a sufficient content of phase change material without affecting the flexibility and processability of the transfer film.

[0006] Furthermore, the substrate layer is a biaxially oriented polyethylene terephthalate film. Biaxially oriented PET film has excellent mechanical strength, dimensional stability and heat resistance, and can provide stable support for each layer during the heat transfer process. Its thickness range allows it to have sufficient support while maintaining good flexibility and thermal conductivity.

[0007] Furthermore, the adhesive layer is a hot melt adhesive layer, and the hot melt adhesive is an ethylene-vinyl acetate copolymer. The EVA hot melt adhesive melts and becomes sticky when heated, and solidifies rapidly after cooling. It can firmly bond the pattern layer of the transfer film to the substrate such as fabric, and has the advantages of high bonding strength and water resistance.

[0008] Furthermore, the release layer is a hot-melt release film with polyethylene wax as the main component. The release layer can melt and release during heat transfer, allowing the substrate layer to separate smoothly from other functional layers. This ensures that the pattern layer and functional layers can be accurately transferred and fixed on the substrate, which is the key to the realization of the heat transfer process.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This cooling heat transfer film has the following advantages: By introducing a functional layer containing phase change microcapsules and thermally conductive fillers, the cooling function can be directly imparted to the substrate during the heat transfer process. The phase change microcapsules undergo a phase change at a specific temperature to absorb heat and produce a lasting cool touch, while the thermally conductive fillers accelerate heat conduction, thereby effectively improving the coolness of textiles and meeting the comfort requirements of summer clothing and sportswear. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] In the diagram: 1. Substrate layer, 2. Release layer, 3. Functional layer, 4. Pattern layer, 5. Adhesive layer. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1 This embodiment provides a technical solution: a cooling heat transfer film, including a substrate layer 1, and a release layer 2, a functional layer 3, a pattern layer 4 and an adhesive layer 5 are sequentially disposed on the lower side of the substrate layer 1 from top to bottom. The substrate layer 1, the release layer 2, the functional layer 3, the pattern layer 4 and the adhesive layer 5 are tightly bonded together by coating and lamination processes. Each layer is tightly bonded together by coating and lamination processes, ensuring the integrity of the transfer film and its reliability during use. Functional layer 3 is a composite material layer containing phase change microcapsules. The wall material of the phase change microcapsules is melamine-formaldehyde resin. Thermally conductive fillers are uniformly distributed inside functional layer 3. The thickness of functional layer 3 is 10μm to 50μm. The thermally conductive fillers are boron nitride or aluminum oxide. The phase change microcapsules can undergo phase changes such as solid-to-liquid transitions at specific temperatures, absorbing and storing heat, thereby producing a lasting cooling sensation. The thermally conductive fillers can quickly conduct heat from the skin to the interior of the functional layer, improving cooling efficiency. The specific thickness range ensures that the functional layer has a sufficient content of phase change material without affecting the flexibility and processability of the transfer film. The substrate layer 1 is a biaxially oriented polyethylene terephthalate film. Biaxially oriented PET film has excellent mechanical strength, dimensional stability and heat resistance, and can provide stable support for each layer during the heat transfer process. Its thickness range allows it to have sufficient support while maintaining good flexibility and thermal conductivity.

[0014] The adhesive layer 5 is a hot melt adhesive layer. The hot melt adhesive is an ethylene-vinyl acetate copolymer. The EVA hot melt adhesive melts and becomes sticky when heated, and solidifies rapidly after cooling. It can firmly bond the pattern layer 4 of the transfer film to the substrate such as fabric, and has the advantages of high bonding strength and water resistance. Release layer 2 is a hot-melt release film with polyethylene wax as the main component. Release layer 2 can melt and release during heat transfer, so that the substrate layer can be separated from other functional layers smoothly. This ensures that pattern layer 4 and functional layer 3 can be accurately transferred and fixed on the substrate, which is the key to the realization of heat transfer process.

[0015] The working principle of the cooling heat transfer film provided by this utility model is as follows: During the heat transfer process, when the heat transfer equipment applies heat and pressure to the transfer film, the heat is first conducted through the substrate layer 1 to the release layer 2, causing the release layer 2 to melt and thus releasing the bond between the substrate layer 1 and other layers; subsequently, under pressure, the functional layer 3, the pattern layer 4, and the adhesive layer 5 separate from the substrate layer 1 as a whole and transfer to the surface of the substrate. At this time, the adhesive layer 5 melts and solidifies under heat, firmly bonding the pattern layer 4 and the functional layer 3 to the substrate. On the printed material; the phase change microcapsules in functional layer 3 undergo a phase change when in contact with skin or when the ambient temperature reaches the phase change point, absorbing and storing heat, thereby producing a lasting cool touch. At the same time, the thermally conductive filler is evenly distributed inside functional layer 3, which can quickly conduct heat from the surface of the substrate to the depth of functional layer 3, improving cooling efficiency. The entire transfer process ensures that functional layer 3 and pattern layer 4 work together to achieve pattern decoration while giving the substrate a cooling function. Moreover, the layers are tightly bonded together through coating and lamination processes, ensuring the integrity and reliability of the transfer film.

[0016] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A chill ice cool heat transfer decal, characterized by: The substrate includes a substrate layer (1), and a release layer (2), a functional layer (3), a pattern layer (4) and an adhesive layer (5) are sequentially arranged on the lower side of the substrate layer (1) from top to bottom. The substrate layer (1), release layer (2), functional layer (3), pattern layer (4) and adhesive layer (5) are tightly bonded together by coating and lamination processes.

2. The cooling ice cool heat transfer decal of claim 1, wherein: The functional layer (3) is a composite material layer containing phase change microcapsules. The wall material of the phase change microcapsules is melamine-formaldehyde resin. Thermally conductive fillers are uniformly distributed inside the functional layer (3). The thickness of the functional layer (3) is 10 μm to 50 μm. The thermally conductive fillers are boron nitride or aluminum oxide.

3. The cooling ice cool heat transfer decal of claim 1, wherein: The substrate layer (1) is a biaxially stretched polyethylene terephthalate film.

4. The cooling ice cool heat transfer decal of claim 1, wherein: The adhesive layer (5) is a hot melt adhesive layer, and the hot melt adhesive is an ethylene-vinyl acetate copolymer.

5. The cooling ice cool heat transfer decal of claim 1, wherein: The release layer (2) is a hot-melt release film with polyethylene wax as the main component.

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