Self-adhesive protective film for household appliances
Patent Information
- Application Number
- CN202521699224.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-08-11
AI Technical Summary
家电保护膜在运输中要承受摩擦和撞击，中层和解卷层都用同样的材料，结构强度不佳，抗穿刺能力较弱易撕破
[0019] This utility model relates to a self-adhesive protective film for household appliances. It uses a homopolymer nylon layer as the surface layer to improve the wear resistance of the protective film. Combined with a first low-density polyethylene layer in the middle layer, it improves the flexibility of the protective film and prevents it from being too hard and brittle, making it unsuitable for curved appliances. Then, a high-density polyethylene layer and/or a cyclic olefin copolymer layer are used as reinforcement layers to improve the mechanical strength and barrier properties of the protective film, making it suitable for household appliances that are prone to corrosion or sensitive.
Smart Images
Figure CN224702691U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of protective film technology, and in particular to a self-adhesive protective film for household appliances. Background Technology
[0002] Protective films come in a wide variety of types depending on their applications, including protective films for household appliances, which are used for surface protection of household appliances during packaging, bundling, fixing, and transportation.
[0003] Existing self-adhesive protective films consist of an unwinding layer, a middle layer, and an adhesive layer, with the unwinding layer and middle layer primarily made of LDPE. Appliance protective films must withstand friction and impact during transportation; using the same material for both the middle and unwinding layers results in poor structural strength, weak puncture resistance, and easy tearing.
[0004] Therefore, it is necessary to improve the existing self-adhesive protective film for household appliances. Utility Model Content
[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a self-adhesive protective film for household appliances. The surface layer of homopolymer nylon is used to improve the wear resistance of the protective film. Combined with the first low-density polyethylene layer in the middle layer, the flexibility of the protective film is improved, preventing it from being too hard and brittle, which is unsuitable for curved appliances. Then, a high-density polyethylene layer and / or a cyclic olefin copolymer layer are used as a reinforcing layer to improve the mechanical strength and barrier properties of the protective film, making it suitable for household appliances that are prone to corrosion or sensitive.
[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a self-adhesive protective film for household appliances, comprising:
[0007] The middle layer includes a reinforcing layer and a first low-density polyethylene layer;
[0008] The outer layer, located on one surface of the middle layer, is a homopolymer nylon layer;
[0009] An adhesive layer, disposed on the other surface of the middle layer, is a styrene-ethylene-butene-styrene block copolymer layer;
[0010] The reinforcing layer is a cyclic olefin copolymer layer, a high-density polyethylene layer, or a composite layer of a cyclic olefin copolymer layer and a high-density polyethylene layer.
[0011] A preferred technical solution is that the layered structure of the middle layer is a first low-density polyethylene layer / cyclic olefin copolymer layer, or a first low-density polyethylene layer / high-density polyethylene layer.
[0012] A preferred technical solution is that the layered structure of the middle layer is a first low-density polyethylene layer / cyclic olefin copolymer layer / high-density polyethylene layer.
[0013] A preferred embodiment is that the middle layer further includes a buffer layer, which is a second low-density polyethylene layer, and the buffer layer is located close to the surface layer.
[0014] A preferred technical solution is that the first low-density polyethylene layer is disposed close to the adhesive layer.
[0015] A preferred technical solution is that the homopolymer nylon layer is connected to the middle layer via a connecting adhesive layer.
[0016] A preferred technical solution is that the connecting adhesive layer is a maleic anhydride-grafted low-density polyethylene layer.
[0017] The preferred technical solution is that the thickness of the middle layer is 40%~50%, the thickness of the surface layer is 35%~40%, the thickness of the adhesive layer is 15%~20%, and the total thickness of the protective film is 35~50μm.
[0018] A preferred technical solution is that the thickness ratio of the reinforcing layer in the middle layer to the first low-density polyethylene layer is (0.2~0.3):1.
[0019] This utility model relates to a self-adhesive protective film for household appliances. It uses a homopolymer nylon layer as the surface layer to improve the wear resistance of the protective film. Combined with a first low-density polyethylene layer in the middle layer, it improves the flexibility of the protective film and prevents it from being too hard and brittle, making it unsuitable for curved appliances. Then, a high-density polyethylene layer and / or a cyclic olefin copolymer layer are used as reinforcement layers to improve the mechanical strength and barrier properties of the protective film, making it suitable for household appliances that are prone to corrosion or sensitive. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of the self-adhesive protective film for household appliances according to this utility model;
[0021] Figure 2 This is a schematic diagram of structure two of the self-adhesive protective film for household appliances according to this utility model;
[0022] Figure 3 This is a schematic diagram of structure three of the self-adhesive protective film for household appliances according to this utility model.
[0023] In the diagram: 1. Middle layer; 2. Top layer; 3. Adhesive layer; 10. Buffer layer; 11. Reinforcing layer; 12. First low-density polyethylene layer; 21. Connecting adhesive layer. Detailed Implementation
[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.
[0025] The terms "surface layer" and "middle layer" are used with reference to the normal use state of self-adhesive protective film for household appliances. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model.
[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0027] like Figures 1-3 As shown, the self-adhesive protective film for household appliances includes a surface layer 2, a middle layer 1, and an adhesive layer 3. The surface layer 2 and the adhesive layer 3 are respectively disposed on the two surfaces of the middle layer 1. The middle layer 1 includes a reinforcing layer 11 and a first low-density polyethylene layer 12. The surface layer 2 is a homopolymer nylon layer. The adhesive layer 3 is a styrene-ethylene-butene-styrene block copolymer layer. The reinforcing layer 11 is a cyclic olefin copolymer layer, a high-density polyethylene layer, or a composite layer of a cyclic olefin copolymer layer and a high-density polyethylene layer.
[0028] The homopolymer nylon layer has excellent puncture resistance, resisting scratches from screws and metal edges during appliance transportation; it also has good rigidity and dimensional stability, ensuring that the protective film remains flat and does not collapse, and does not curl up when applied to complex curved surfaces.
[0029] The styrene-ethylene-butene-styrene block copolymer (SEBS) layer has hydrogenated polysaturated segments (ethylene-butene) in the middle, resulting in improved stability without double bonds. Using SEBS as the adhesive layer can reduce adhesive residue after the protective film is peeled off.
[0030] The wear resistance of the protective film is improved by using a homopolymer nylon layer as the surface layer 2, and the flexibility of the protective film is improved by combining the first low-density polyethylene layer 12 set in the middle layer 1, so as to prevent it from being too hard and brittle, which is unsuitable for curved electrical appliances; and the mechanical strength and barrier properties of the protective film are improved by using a high-density polyethylene layer and / or a cyclic olefin copolymer layer as the reinforcing layer 11, which is suitable for household appliances that are prone to corrosion or sensitive.
[0031] The surface of surface layer 2 is provided with a release layer, or an open material is added to the raw material of surface layer 2 to facilitate the unwinding and use of the protective film.
[0032] In some designs, the middle layer 1 has a laminated structure of a first low-density polyethylene layer / cyclic olefin copolymer layer, wherein the first low-density polyethylene layer 12 is disposed close to the adhesive layer 3.
[0033] In other embodiments, the laminated structure of the middle layer 1 is a first low-density polyethylene layer / high-density polyethylene layer, wherein the first low-density polyethylene layer 12 is disposed close to the adhesive layer 3.
[0034] To obtain a structurally stable protective film, in some preferred embodiments, the middle layer 1 has a laminated structure of a first low-density polyethylene layer / cyclic olefin copolymer layer / high-density polyethylene layer, wherein the first low-density polyethylene layer 12 is disposed close to the adhesive layer 3. The middle layer 1 also includes a buffer layer 10, which is a second low-density polyethylene layer, disposed close to the surface layer 2. The buffer layer 10 is configured to further improve the flexibility and processing stability of the protective film.
[0035] In some designs, the homopolymer nylon layer is connected to the reinforcing layer 11 of the middle layer 1 via a bonding adhesive layer 21.
[0036] In some preferred embodiments, the homopolymer nylon layer is connected to the buffer layer 10 via a bonding adhesive layer 21.
[0037] The connecting adhesive layer 21 is a maleic anhydride-grafted low-density polyethylene layer. By grafting the maleic anhydride-grafted low-density polyethylene layer, the polarity is increased, thereby improving the compatibility between the homopolymer nylon layer and the buffer layer 10 or the reinforcing layer 11, and further improving the flexibility of the protective film.
[0038] To optimize the thickness of the middle layer, ensuring both the flexibility and mechanical strength of the protective film, and optimizing raw material costs, the thickness ratio of the reinforcing layer 11 to the first low-density polyethylene layer 12 in the middle layer 1 is (0.2~0.3):1. Further, in a preferred embodiment, the thickness ratio of the cyclic olefin copolymer layer to the high-density polyethylene layer is 1:1.
[0039] Furthermore, the thickness of the middle layer 1 is 40%~50%, the thickness of the top layer 2 is 35%~40%, the thickness of the adhesive layer 3 is 15%~20%, and the total thickness of the protective film is 35~50μm.
[0040] like Figure 1 As shown, Structure 1: The self-adhesive protective film for household appliances comprises, from the outside to the inside, a homopolymer nylon layer, a connecting adhesive layer, a cyclic olefin copolymer layer, a first low-density polyethylene layer, and an adhesive layer, stacked sequentially.
[0041] like Figure 2 As shown, Structure 2: The self-adhesive protective film for household appliances includes, from the outside to the inside, a homopolymer nylon layer / connecting adhesive layer / high-density polyethylene layer / first low-density polyethylene layer / adhesive layer stacked sequentially.
[0042] like Figure 3As shown, structure three: the self-adhesive protective film for household appliances includes, from the outside to the inside, a homopolymer nylon layer / connecting adhesive layer / second low-density polyethylene layer / high-density polyethylene layer / cyclic olefin copolymer layer / first low-density polyethylene layer / adhesive layer stacked sequentially.
[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A self-adhesive protective film for household appliances, characterized in that, include: The middle layer includes a reinforcing layer and a first low-density polyethylene layer; The outer layer, located on one surface of the middle layer, is a homopolymer nylon layer; An adhesive layer, disposed on the other surface of the middle layer, is a styrene-ethylene-butene-styrene block copolymer layer; The reinforcing layer is a cyclic olefin copolymer layer, a high-density polyethylene layer, or a composite layer of a cyclic olefin copolymer layer and a high-density polyethylene layer.
2. The self-adhesive protective film for household appliances according to claim 1, characterized in that, The middle layer has a stacked structure of either a first low-density polyethylene layer / cyclic olefin copolymer layer or a first low-density polyethylene layer / high-density polyethylene layer.
3. The self-adhesive protective film for household appliances according to claim 1, characterized in that, The middle layer has a stacked structure of a first low-density polyethylene layer / cyclic olefin copolymer layer / high-density polyethylene layer.
4. The self-adhesive protective film for household appliances according to claim 3, characterized in that, The middle layer also includes a buffer layer, which is a second low-density polyethylene layer, and the buffer layer is close to the surface layer.
5. The self-adhesive protective film for household appliances according to claim 2 or 4, characterized in that, The first low-density polyethylene layer is disposed close to the adhesive layer.
6. The self-adhesive protective film for household appliances according to claim 2 or 4, characterized in that, The homopolymer nylon layer is connected to the middle layer via a bonding adhesive layer.
7. The self-adhesive protective film for household appliances according to claim 6, characterized in that, The bonding adhesive layer is a maleic anhydride-grafted low-density polyethylene layer.
8. The self-adhesive protective film for household appliances according to claim 6, characterized in that, The thickness of the middle layer is 40%~50%, the thickness of the top layer is 35%~40%, the thickness of the adhesive layer is 15%~20%, and the total thickness of the protective film is 35~50μm.
9. The self-adhesive protective film for household appliances according to claim 2 or 3, characterized in that, The thickness ratio of the reinforcing layer in the middle layer to the first low-density polyethylene layer is (0.2~0.3):1.