A silicone iridescent reflective heat pack

Abstract

This utility model discloses a silicone iridescent reflective heat-sensitive adhesive, comprising: a reflective layer, an adhesive layer, and a protective layer, wherein the adhesive layer bonds the reflective layer and the protective layer. In this utility model, the reflective layer serves as the top film, and the protective layer as the bottom film. The adhesive layer, consisting of a coating of adhesive material and a silicone adhesive layer, is coated onto the protective layer and bonded to the reflective layer. After calendering and drying, it achieves a strong three-dimensional effect, high weather resistance, long service life, and is not easily worn or aged. It is a solvent-free composite adhesive, formed by one-step mixing of liquid silicone, curing agent, color paste, and other materials to create the coating adhesive layer. This results in strong adsorption and high anti-sublimation properties. No volatile organic compounds, wastewater, or waste liquid are generated during each processing unit, effectively improving production efficiency and reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of reflective heat pack technology, specifically to a silicone iridescent reflective heat pack. Background Technology

[0002] Reflective heat-sensitive films are special heat-sensitive films that utilize optical principles to reflect light back to the light source. When illuminated, they reflect light, serving a visible, warning, safety, and aesthetic purpose. Reflective heat-sensitive films are generally divided into three main categories: high-brightness all-silver heat-sensitive films, medium-brightness colored heat-sensitive films, and medium-brightness iridescent heat-sensitive films. After processing such as engraving and lettering, all-silver heat-sensitive films are often used for work uniforms of traffic police, firefighters, sanitation workers, delivery personnel, and drivers who work at night, as well as for outdoor clothing and children's wear from various sports brands. Colored and iridescent heat-sensitive films not only provide safety warnings but also, due to their rich colors and dazzling optical effects, are widely used in various trendy clothing, shoes, hats, bags, accessories, gloves, and outdoor products.

[0003] Ordinary reflective heat-sensitive adhesives contain solvent-based composite adhesives. Due to the complexity of various media such as glass beads, aluminum layers, hot melt adhesives, and other adhesives in the product structure, they have certain defects in terms of resistance to aging in various environments. When exposed to humid and hot air, acidic and alkaline solutions, sweat, solvents, or subjected to external forces such as bending, scratching, and abrasion, the reflective coating will be damaged, thus affecting the product's appearance and reflectivity. In addition, the production process requires a combination of processes such as reflective film screen printing silicone, reflective ink, and drip molding silicone, and the emission of pollutants must be treated by environmental protection devices such as exhaust hoods and exhaust gas filters. This results in poor product uniformity, low production efficiency, and high processing costs. Utility Model Content

[0004] The purpose of this utility model is to provide a silicone iridescent reflective heat pack to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The reflective layer, the adhesive layer, and the protective layer are provided, wherein the adhesive layer bonds the reflective layer and the protective layer.

[0007] As a further description of the above technical solution, the adhesive layer includes a coating adhesive layer and a silicone adhesive layer. The coating adhesive layer and the silicone adhesive layer are coated on the protective layer and bonded to the reflective layer, and then calendered, dried and shaped.

[0008] As a further description of the above technical solution, the upper end face of the coating adhesive layer is bonded to the reflective layer, the lower end face of the coating adhesive layer is bonded to the silicone adhesive layer, and the lower end face of the silicone adhesive layer is bonded to the protective layer.

[0009] As a further description of the above technical solution, the thickness of the coating adhesive layer is 30-100μm, and the thickness of the silicone adhesive layer is 5-10μm.

[0010] As a further description of the above technical solution, the thickness of the protective layer is 5-10μm, and the material of the protective layer is hot melt adhesive.

[0011] As a further description of the above technical solution, the reflective layer includes a first base film layer and a second base film layer, wherein the thickness of the first base film layer is 1-3 μm and the thickness of the second base film layer is 1-3 μm.

[0012] As a further description of the above technical solution, a microsphere layer is embedded on the second bottom film layer, and the material of the microsphere layer is selected from one or a combination of glass microspheres, foamed microspheres, and organic hollow microspheres.

[0013] As a further description of the above technical solution, the exposed height of the microsphere layer in the second bottom film layer is 0-40μm, and the exposed height of the microsphere layer in the adhesive layer may be the same or different.

[0014] As a further description of the above technical solution, a thin adhesive layer is provided at the bottom of the second bottom film layer, and the thickness of the thin adhesive layer is 1-5μm.

[0015] As a further description of the above technical solution, a metal coating is provided on the lower part of the thin adhesive layer, and the thickness of the metal coating is 0.1-100nm.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. In this utility model, the reflective layer is used as the top film, the protective layer is used as the bottom film, and the adhesive layer and the silicone adhesive layer in the bonding layer are coated on the protective layer and bonded to the reflective layer. After calendering, drying and shaping, it has a strong three-dimensional effect, high weather resistance, long service life and is not easy to wear and age.

[0018] 2. This utility model is a solvent-free composite adhesive. It is made by mixing liquid silicone, curing agent, color paste and other materials in one step to form a coating adhesive layer. It has strong adsorption and high anti-sublimation properties. No volatile organic compounds, wastewater and waste liquid are generated when passing through each processing unit, which effectively improves production efficiency and reduces production costs.

[0019] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the new silicone iridescent reflective heat patch. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the new silicone iridescent reflective heat patch. Figure 2 .

[0022] Figure label:

[0023] 1. Reflective layer; 11. First base film layer; 12. Second base film layer; 13. Microsphere layer; 14. Thin adhesive layer; 15. Metal plating layer; 2. Adhesive layer; 21. Coated adhesive layer; 22. Silicone adhesive layer; 3. Protective layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] like Figure 1 - Figure 2 As shown, in one embodiment, a silicone iridescent reflective heat pack includes: a reflective layer 1, an adhesive layer 2, and a protective layer 3, wherein the adhesive layer 2 is used to bond the reflective layer 1 and the protective layer 3.

[0026] The reflective layer 1 includes a first base film layer 11 and a second base film layer 12, which serve as the substrate for the reflective layer 1. Specifically, the first base film layer 11 is made of polyethylene terephthalate (PET) with a thickness of 1-3 μm, and the second base film layer 12 is made of polyethylene (PE) with a thickness of 1-3 μm.

[0027] Furthermore, a microsphere layer 13 is embedded in the second bottom film layer 12, which can refract light and enhance the glare effect. Specifically, the material of the microsphere layer 13 is selected from one or a combination of glass microspheres, foamed microspheres, and organic hollow microspheres; the exposed height of the microsphere layer 13 in the second bottom film layer 12 is 0-40μm, and the exposed height of the microsphere layer 13 in the adhesive layer 2 may be the same or different.

[0028] Furthermore, a thin adhesive layer 14 is disposed at the lower part of the second bottom film layer 12, and a metal plating layer 15 is disposed at the lower part of the thin adhesive layer 14. This allows the microsphere layer 13 to be firmly wrapped and fixed on the second bottom film layer 12, improving water resistance and preventing the microsphere layer 13 from falling off while effectively enhancing the reflective effect. Specifically, the thickness of the thin adhesive layer 14 is 1-5 μm, and the thickness of the metal plating layer 15 is 0.1-100 nm.

[0029] Please continue reading. Figure 1 - Figure 2In this embodiment, the adhesive layer 2 includes a coating adhesive layer 21 and a silicone adhesive layer 22. The coating adhesive layer 21 and the silicone adhesive layer 22 are coated on the protective layer 3 and bonded to the reflective layer 1, and then calendered, dried and shaped.

[0030] The coating layer 21 is obtained by thoroughly mixing liquid silicone, curing agent, and color paste in a certain proportion and then vacuum stirring until uniform. It is then coated onto the protective layer 3 through a coating head. Specifically, the upper surface of the coating layer 21 is bonded to the reflective layer 1, while the lower surface is bonded to the silicone adhesive layer 22. The thickness of the coating layer 21 is 30-100 μm. The lower surface of the silicone adhesive layer 22 is bonded to the protective layer 3, and the thickness of the silicone adhesive layer 22 is 5-10 μm.

[0031] Understandably, the coating layer 21 is made of silicone material, which is environmentally friendly, non-toxic, and solvent-free composite adhesive. It can come into direct contact with the skin, and its disposal will not cause environmental pollution. Moreover, it does not require a combination of processes such as reflective film screen printing silicone, reflective ink, and drip molding silicone. It does not generate any volatile organic compounds, wastewater, or waste liquid when passing through each processing unit. It does not require the use of environmental protection treatment devices such as exhaust hoods and exhaust gas filters, which effectively saves energy and reduces production costs.

[0032] Meanwhile, compared to traditional PVC and PU lettering films, silicone lettering films are not only environmentally friendly and non-toxic, soft and skin-friendly, and have a high-end feel, but also possess excellent resilience and deformation resistance, as well as high elasticity, water resistance, good tensile strength, abrasion resistance, colorfastness, crack resistance, non-peeling, deformation resistance, high opacity, non-stickiness, anti-slip properties, and easy cleaning. Combining silicone lettering films with reflective heat-applied adhesive manufacturing processes results in silicone iridescent reflective heat-applied adhesives that have a softer touch, a strong three-dimensional effect, and a cool and gorgeous reflective effect. This effectively compensates for the shortcomings of ordinary colored reflective heat-applied adhesives and also makes up for the deficiencies of traditional bright silver reflective heat-applied adhesive films. They also possess anti-aging properties such as high temperature resistance, low temperature resistance, oxidation resistance, yellowing resistance, solvent resistance, and acid and alkali resistance, effectively enhancing the product value of reflective heat-applied adhesive films. Simultaneously, they give silicone lettering films the special reflective effect, ultimately resulting in functional silicone reflective heat-applied adhesive films.

[0033] Please continue reading. Figure 1 - Figure 2In this embodiment, the thickness of the protective layer 3 is 5-10 μm, and the material of the protective layer 3 is a hot melt adhesive film. Hot melt adhesive film is a thermoplastic adhesive, typically made of polymers such as ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU), polyamide (PA), polyester resin (PES), and polyolefin (PO); it melts when heated and can be quickly bonded to another film layer under appropriate pressure, without producing odors or toxic substances.

[0034] Preparation method:

[0035] The substrate uses our own reflective layer 1 (bright silver iridescent beaded film) as the cover film, and a purchased protective layer 3 (hot melt adhesive film) as the base film. Liquid silicone, curing agent, color paste, and other materials are thoroughly mixed in a specific ratio and vacuum stirred until homogeneous to obtain the coating adhesive. The coating adhesive layer 21 and silicone adhesive layer 22 of the adhesive layer 2 are coated onto the protective layer 3 and bonded to the reflective layer 1, then calendered, dried, and shaped.

[0036] The hot melt adhesive film base film substrate is guided by the guide rollers from the base film unwinding roller and passes through the horizontal feeding platform. The coating adhesive enters the adhesive trough in front of the calendering rollers through the coating liquid conveyor head, and then contacts the hot melt adhesive film base film substrate. It moves with the production speed of the platform and enters the gap between the calendering rollers. At the same time, the bright silver iridescent beaded film cover film substrate is unwound and guided by the guide rollers through the gap between the substrate calendering rollers for calendering. Then, the adhesive between the upper and lower films is carried into the internal tunnel of the oven for high-temperature baking (120 degrees Celsius, baking for 3 minutes) along with the conveyor belt. After exiting the oven, it is wound up by the film take-up roller.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A silicon gel color-changing reflective heat-stick, characterized in that, include: A reflective layer (1), an adhesive layer (2) and a protective layer (3), wherein the adhesive layer (2) bonds the reflective layer (1) and the protective layer (3); The adhesive layer (2) includes a coating adhesive layer (21) and a silicone adhesive layer (22). The coating adhesive layer (21) and the silicone adhesive layer (22) are coated on the protective layer (3) and bonded to the reflective layer (1) and then calendered, dried and shaped. The upper end face of the coating adhesive layer (21) is bonded to the reflective layer (1), the lower end face of the coating adhesive layer (21) is bonded to the silicone adhesive layer (22), and the lower end face of the silicone adhesive layer (22) is bonded to the protective layer (3). The coating adhesive layer (21) is a mixture of liquid silicone, curing agent and color paste.

2. The silicone-gel iridescent retroreflective thermal patch of claim 1, wherein, The thickness of the coating adhesive layer (21) is 30-100 μm, and the thickness of the silicone adhesive layer (22) is 5-10 μm.

3. The silicone-gel iridescent retroreflective thermal patch of claim 1, wherein, The thickness of the protective layer (3) is 5-10 μm, and the material of the protective layer (3) is hot melt adhesive.

4. The silicone-gel iridescent retroreflective thermal patch of claim 1, wherein, The reflective layer (1) includes a first base film layer (11) and a second base film layer (12), the thickness of the first base film layer (11) is 1-3 μm, and the thickness of the second base film layer (12) is 1-3 μm.

5. The silicone-gel iridescent retroreflective thermal patch of claim 4, wherein, The second bottom film layer (12) is embedded with a microsphere layer (13), the material of which is selected from one or a combination of glass microspheres, foamed microspheres, and organic hollow microspheres.

6. The silicone iridescent reflective heat pack according to claim 5, characterized in that, The exposed height of the microbead layer (13) in the second bottom film layer (12) is 0-40 μm, and the exposed height of the microbead layer (13) in the adhesive layer (2) may be the same or different.

7. The silicone-gel iridescent retroreflective thermal patch of claim 5, wherein, A thin adhesive layer (14) is provided at the lower part of the second bottom film layer (12), and the thickness of the thin adhesive layer (14) is 1-5 μm.

8. The silicone-gel iridescent retroreflective thermal patch of claim 7, wherein, A metal coating (15) is provided at the lower part of the thin adhesive layer (14), and the thickness of the metal coating (15) is 0.1-100nm.

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