Foam shading adhesive tape
By introducing a layered structure of upper release film, upper light-blocking adhesive, foam layer, light-blocking TPU film, lower light-blocking adhesive, and lower release film into the foam tape, the problem of easy breakage of foam tape during use is solved, enabling multiple uses and performance improvement of the tape.
Patent Information
- Application Number
- CN202520246646.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Foam tape is prone to breakage during use, making it difficult to reuse, and the light-blocking material affects the product's strength and adhesion.
The structure is designed with the following layers arranged from top to bottom: upper release film, upper light-blocking adhesive, foam layer, light-blocking TPU film, lower light-blocking adhesive, and lower release film. Specific types of pressure-sensitive adhesive and TPU film materials are used to ensure that the foam structure is not damaged after the tape is torn.
This enables the repeated use of foam tape, improving the product's application range and performance stability.
Smart Images
Figure CN223892682U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foam tape technology, specifically a foam light-blocking tape. Background Technology
[0002] Foam tape is mainly made by coating pressure-sensitive adhesive on one or both sides of PE (polyethylene), EVA (ethylene-vinyl acetate copolymer), PU (polyurethane), EPDM (ethylene propylene diene monomer rubber) foam as the base material. Foam tape is widely used in the electronics, mobile phone, computer, and automotive industries, mainly demonstrating functions such as bonding, cushioning, and shock absorption.
[0003] Light-blocking tape is mainly composed of a light-blocking substrate and a light-blocking pressure-sensitive adhesive. Its light-blocking properties are mainly achieved by adding light-blocking fillers, but this also seriously affects the performance of the product, weakening its strength, adhesion, and other properties.
[0004] Foam substrates are mainly porous and have low strength, which makes foam tapes prone to breakage during use and difficult to reuse, severely affecting the product's application range.
[0005] Therefore, in order to correct the above-mentioned defects, we propose a foam blackout tape. Utility Model Content
[0006] The technical problem solved by this utility model is to provide a foam light-blocking tape.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a foam light-blocking tape, comprising, from top to bottom, an upper release film, an upper light-blocking adhesive, a foam layer, a light-blocking TPU film, a lower light-blocking adhesive, and a lower release film.
[0008] The upper release film is one of silicone oil release film, non-silicone release film, or fluorine release film.
[0009] The light-shielding adhesive is one of the following: acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive, or rubber pressure-sensitive adhesive.
[0010] The color of the light-shielding adhesive is one of black, white, or gray.
[0011] The foam layer is one of PE foam, EVA foam, PU foam, and EPDM foam.
[0012] The light-shielding TPU film is one of aliphatic TPU film, aromatic TPU film, or polyurethane-polyester copolymer TPU film.
[0013] The light-shielding TPU film is one of the following colors: black, white, gray, or silver.
[0014] The lower light-shielding adhesive is one of the following: acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive, and rubber pressure-sensitive adhesive.
[0015] The color of the lower light-shielding adhesive is one of black, white, or gray.
[0016] The lower release film is one of silicone oil release film, non-silicone release film, or fluorine release film.
[0017] The thickness of the upper release film is 20-80 μm.
[0018] The thickness of the light-shielding adhesive is 10-50 μm.
[0019] The thickness of the foam layer is 100-2000μm.
[0020] The thickness of the light-shielding TPU film is 10-100μm.
[0021] The thickness of the lower light-shielding adhesive is 10-50 μm.
[0022] The thickness of the lower release film is 20-80 μm.
[0023] Compared with the prior art, the beneficial effects of this utility model are: the foam light-blocking tape of this utility model can be reused repeatedly, and the foam structure will not be damaged after being torn, thus improving the application range of the product. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structural components of this utility model.
[0025] Numbering on the map:
[0026] 1. Upper release film; 2. Upper light-blocking adhesive; 3. Foam layer; 4. Light-blocking TPU film; 5. Lower light-blocking adhesive; 6. Lower release film. Detailed Implementation
[0027] 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.
[0028] This utility model provides a technical solution:
[0029] Please see Figure 1A foam light-blocking tape includes, in sequence, an upper release film 1, an upper light-blocking adhesive 2, a foam layer 3, a light-blocking TPU film 4, a lower light-blocking adhesive 5, and a lower release film 6. The upper release film 1 is one of a silicone oil release film, a non-silicone release film, or a fluorinated release film. The upper light-blocking adhesive 2 is one of an acrylic pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, or a rubber pressure-sensitive adhesive. The foam layer 3 is one or more of PE foam, EVA foam, PU foam, and EPDM foam. The light-blocking TPU film 4 is one or more of an aliphatic TPU film, an aromatic TPU film, and a polyurethane-polyester copolymer TPU film. The lower light-blocking adhesive 5 is one of an acrylic pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, or a rubber pressure-sensitive adhesive. The lower release film 6 is one of a silicone oil release film, a non-silicone release film, or a fluorinated release film. The foam light-blocking tape provided by this utility model allows the tape to be reused repeatedly, and the foam structure will not be damaged after being torn, thus improving the product's application range.
[0030] In this invention, the upper release film 1 is preferably a non-silicone release film, more preferably a silicone oil release film. The thickness of the upper release film 1 is 20-80 μm, preferably 50 μm, and more preferably 36 μm.
[0031] As a further improvement to the technical solution, the upper light-shielding adhesive 2 is preferably a rubber-based pressure-sensitive adhesive, more preferably an acrylic-based pressure-sensitive adhesive. The thickness of the upper light-shielding adhesive 2 is 10-50 μm, preferably 25 μm, more preferably 30 μm. The color of the upper light-shielding adhesive is preferably gray, more preferably black.
[0032] As a further improvement to the technical solution, foam layer 3 is preferably EVA foam, and more preferably PU foam. The thickness of foam layer 3 is 100-1200μm, preferably 1000μm, and more preferably 700μm. The color of the foam layer is preferably white, and more preferably black.
[0033] As a further improvement to the technical solution, the light-shielding TPU film 4 is preferably an aromatic TPU film, more preferably an aliphatic TPU film. The thickness of the light-shielding TPU film 4 is 10-100 μm, preferably 30 μm, more preferably 40 μm, and most preferably 50 μm. The color of the light-shielding TPU film 4 is preferably white, more preferably gray, and most preferably black.
[0034] As a further improvement to the technical solution, the lower light-shielding adhesive 5 is preferably a rubber-based pressure-sensitive adhesive, more preferably an acrylic-based pressure-sensitive adhesive. The thickness of the lower light-shielding adhesive 5 is 10-50 μm, preferably 25 μm, more preferably 30 μm. The color of the upper light-shielding adhesive 5 is preferably gray, more preferably black.
[0035] As a further improvement to the technical solution, the lower release film 6 is preferably a non-silicone release film, more preferably a silicone oil release film. The thickness of the lower release film 6 is 20-80 μm, preferably 50 μm, and more preferably 36 μm.
[0036] Therefore, the foam light-blocking tape provided by this utility model can be reused repeatedly, and the foam structure will not be damaged when torn, thus improving the product's application range.
[0037] This invention does not impose any special restrictions on the source of any raw materials, as long as they are known to those skilled in the art.
[0038] The preparation process of the above-mentioned foam light-blocking tape is as follows:
[0039] A prepared light-shielding polyurethane slurry is coated onto a non-silicone release film, and after drying, a light-shielding TPU film is obtained. This film is then hot-pressed onto a foam material without a backing film. After curing, a light-shielding pressure-sensitive adhesive with a release film backing is laminated onto the other side of the foam. The non-silicone release film of the light-shielding TPU film is then peeled off, and another light-shielding pressure-sensitive adhesive with a release film backing is laminated. After curing, a foam light-shielding tape is obtained.
[0040] The following is a detailed explanation of the preparation process of foam light-blocking tape, using an actual preparation process as an example: Example
[0041] A prepared black polyurethane slurry was coated onto a 50μm non-silicone release film and dried at 130℃ to form a 50μm thick black light-blocking TPU film. A 700μm thick black foam material was then laminated onto this film at 60℃ and 0.5MPa. After curing at 50℃ for 72 hours, a foam-TPU film composite was obtained. A prepared gray acrylate pressure-sensitive adhesive was coated onto a 50μm silicone release film and dried at 120℃ to form a 30μm thick gray light-blocking adhesive. The foam side of the composite foam-TPU film served as the upper light-blocking adhesive. After peeling off the non-silicone release film from the light-blocking TPU film, a 30μm thick gray light-blocking adhesive was laminated as the lower light-blocking adhesive. After curing at room temperature for 5 days, a foam light-blocking tape was obtained. Example
[0042] A prepared white polyurethane slurry was coated onto a 50μm non-silicone release film and dried at 130℃ to form a 40μm thick white light-shielding TPU film. A 1000μm thick white foam material was then laminated onto this film at 60℃ and 0.5MPa. After curing at 50℃ for 72 hours, a foam-TPU film composite was obtained. A prepared white acrylic pressure-sensitive adhesive was coated onto a 50μm silicone release film and dried at 120℃ to form a 35μm thick gray light-shielding adhesive. The foam side of the composite foam-TPU film served as the upper light-shielding adhesive. After peeling off the non-silicone release film from the light-shielding TPU film, a 35μm thick gray light-shielding adhesive was laminated as the lower light-shielding adhesive. After curing at room temperature for 5 days, a foam light-shielding tape was obtained. Example
[0043] A prepared black polyurethane slurry was coated onto a 50μm non-silicone release film and dried at 130℃ to form a 35μm thick black light-blocking TPU film. A 500μm thick black foam material was then laminated onto this film at 60℃ and 0.5MPa. After curing at 50℃ for 72 hours, a foam-TPU film composite was obtained. A prepared black acrylate pressure-sensitive adhesive was coated onto a 50μm silicone release film and dried at 120℃ to form a 25μm thick black light-blocking adhesive. The foam side of the composite foam-TPU film served as the upper light-blocking adhesive. After peeling off the non-silicone release film from the light-blocking TPU film, a 25μm thick black light-blocking adhesive was laminated as the lower light-blocking adhesive. After curing at room temperature for 5 days, a foam light-blocking tape was obtained.
[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A foam light-blocking tape, characterized in that: It includes, from top to bottom, an upper release film (1), an upper light-blocking adhesive (2), a foam layer (3), a light-blocking TPU film (4), a lower light-blocking adhesive (5), and a lower release film (6).
2. The foam light-blocking tape according to claim 1, characterized in that: The upper release film (1) is one of silicone oil release film, non-silicone release film, or fluorine release film.
3. The foam light-blocking tape according to claim 1, characterized in that: The light-shielding adhesive (2) is one of the following: acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive, or rubber pressure-sensitive adhesive.
4. The foam light-blocking tape according to any one of claims 1 or 3, characterized in that: The color of the light-blocking adhesive (2) is one of black, white, or gray.
5. The foam light-blocking tape according to claim 1, characterized in that: The foam layer (3) is one of PE foam, EVA foam, PU foam, or EPDM foam.
6. The foam light-blocking tape according to claim 1, characterized in that: The light-shielding TPU film (4) is one of aliphatic TPU film, aromatic TPU film, or polyurethane-polyester copolymer TPU film.
7. The foam light-blocking tape according to any one of claims 1 or 6, characterized in that: The light-shielding TPU film (4) is one of the following colors: black, white, gray, or silver.
8. The foam light-blocking tape according to claim 1, characterized in that: The lower light-shielding adhesive (5) is one of the following: acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive, and rubber pressure-sensitive adhesive.
9. The foam light-blocking tape according to any one of claims 1 or 8, characterized in that: The lower light-blocking adhesive (5) is one of black, white, or gray.
10. The foam light-blocking tape according to claim 1, characterized in that: The lower release film (6) is one of silicone oil release film, non-silicone release film, or fluorine release film.