CN216786036U - Flexible protective film - Google Patents
Flexible protective film Download PDFInfo
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- CN216786036U CN216786036U CN202123111958.2U CN202123111958U CN216786036U CN 216786036 U CN216786036 U CN 216786036U CN 202123111958 U CN202123111958 U CN 202123111958U CN 216786036 U CN216786036 U CN 216786036U
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Abstract
The application provides a flexible protective film, which is used for being attached to the surface of a protected material and comprises a base material layer; wherein the substrate layer is configured as a composite laminate structure; the composite laminated structure comprises a first base material layer and a second base material layer which are attached to each other. The utility model provides a flexible protection film is through setting the substrate layer to compound laminated structure, and compound laminated structure is including the first substrate layer and the second substrate layer of laminating mutually to keeping under the unchangeable circumstances of thickness, having improved compliance, the attachability of flexible protection film, having reduced the deflection, satisfied user's demand.
Description
Technical Field
The application relates to the field of protective films, in particular to a flexible protective film.
Background
The protective film can be applied to the following fields according to the application range: metal product surfaces, coated metal product surfaces, plastic product surfaces, automotive product surfaces, electronic product surfaces, signage product surfaces, profile product surfaces, and other product surfaces.
On the market, the thickness of the protective film varies depending on the product to be used, and the main stream has thicknesses of 0.05mm, 0.075mm, and 0.1 mm.
In the prior art, according to the thickness of a protective film substrate required by an application product, a layer of adhesive is coated on the surface of the substrate with the thickness to form an adhesive layer, and the adhesive layer is attached to a stripping layer to form a protective film. However, the protective film substrate in the prior art has relatively high hardness and relatively high stiffness under the same thickness, so that the protective film cannot be adhered to the surface of the protected material very well, and the defect is particularly obvious when facing the adhered material with rough and uneven surface or the adhered material with corners and folding angles.
Disclosure of Invention
In view of this, the present application provides a flexible protective film, so as to solve the technical problem that the protective film substrate in the prior art has a relatively high hardness and a relatively high stiffness under the same thickness, and thus cannot be adhered to the surface of the protected material very snugly.
According to one aspect of the present application, there is provided a flexible protective film for attachment to a surface of a material to be protected, the flexible protective film comprising a substrate layer; wherein the substrate layer is configured as a composite laminate structure; the composite laminated structure comprises a first base material layer and a second base material layer which are attached to each other.
In one possible implementation, the first substrate layer and the second substrate layer are both polyethylene terephthalate substrates.
In one possible implementation, the thickness of the first substrate layer is set to be less than or equal to 38 μm; the thickness of the second base material layer is set to be less than or equal to 50 μm.
In one possible implementation, the flexible protective film further includes a first adhesive layer; wherein, the two opposite sides of the first glue layer are respectively used for gluing with the protected material and the first substrate layer.
In one possible implementation manner, the first adhesive layer is configured as a silica gel adhesive layer.
In one possible implementation, the composite laminate structure further includes a second glue layer; the two opposite surfaces of the first base material layer are respectively glued with the first glue layer and the second glue layer; and the first substrate layer and the second substrate layer are glued together through the second glue layer.
In a possible implementation manner, the second adhesive layer is an acrylic adhesive layer.
In one possible implementation, the tackiness of the second layer of glue is greater than or equal to 1000 grams per 25 millimeters.
In a possible implementation manner, the length of the first glue layer is less than or equal to the length of the first substrate layer; the width of the first glue layer is smaller than or equal to that of the first base material layer; the length of the second glue layer is less than or equal to that of the first base material layer and less than or equal to that of the second base material layer; the width of the second glue layer is smaller than or equal to the width of the first base material layer, and smaller than or equal to the width of the second base material layer.
In one possible implementation, the flexible protective film further includes a release layer; the peeling layer is attached to the first base material layer through the first adhesive layer; wherein, the stripping layer is arranged as a release film.
The utility model provides a flexible protection film is through setting the substrate layer to composite laminated structure, and composite laminated structure is including the first substrate layer and the second substrate layer of laminating mutually to keeping under the unchangeable condition of thickness, having improved compliance, the attachability of flexible protection film, having reduced the deflection, satisfied user's demand.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic cross-sectional view for illustrating a flexible protective film of the present application;
fig. 2 is a schematic flow chart for illustrating a method of manufacturing the flexible protective film of the present application.
Detailed Description
In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indicators in the embodiments of the present application (such as upper, lower, left, right, front, rear, top, bottom … …) are only used to explain the relative positional relationship between the components, the movement, etc. in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present application.
The protective film can be applied to the following fields according to the application range: metal product surfaces, coated metal product surfaces, plastic product surfaces, automotive product surfaces, electronic product surfaces, signage product surfaces, profile product surfaces, and other product surfaces.
On the market, the thickness of the protective film varies depending on the product to be used, and the main stream has thicknesses of 0.05mm, 0.075mm, and 0.1 mm.
In the prior art, according to the thickness of a protective film substrate required by an application product, a layer of adhesive is coated on the surface of the substrate with the thickness to form an adhesive layer, and the adhesive layer is attached to a stripping layer to form a protective film. However, the hardness and stiffness of the protective film substrate in the prior art are relatively high under the same thickness, which results in that the protective film substrate cannot be adhered to the surface of the protected material very snugly, and the defect is particularly obvious when facing the attached material with rough and uneven surface or the attached material with corners and folding angles.
To solve the above problems, according to an aspect of the present application, a flexible protective film 100 is provided to solve the above technical problems.
Fig. 1 is a schematic cross-sectional structural view of a flexible protection film 100 provided in one possible implementation manner of the present application.
In this embodiment, the flexible protective film 100 is attached to a surface of a material to be protected (not shown). The flexible protective film 100 includes a substrate layer 1. The substrate layer 1 is configured as a composite laminated structure to improve the pliability and conformability of the flexible protective film 100 on the surface of the protected material. The composite laminated structure includes a first substrate layer 11 and a second substrate layer 12 which are bonded to each other.
The realization mode adopts the technical means that at least two thin base material layers which are thinner than the original base material layer are laminated and compounded to form a new base material layer to replace the original base material layer, so as to obtain the protective film which is smooth and better in fitting property under the same thickness of the base material layer; that is, the substrate layer 1 adopted in the present embodiment includes the first substrate layer 11 and the second substrate layer 12 that are attached to each other, and the thicknesses of the first substrate layer 11 and the second substrate layer 12 are both smaller than the thickness of the substrate layer 1. Therefore, the stiffness of the whole material can be effectively reduced, and the softness of the flexible protective film 100 is enhanced.
The flexible protective film 100 is compliant and conformable, so that the flexible protective film can be adaptive to surfaces with various shapes, and the technical problems of warping and edge rising are reduced. The core of the technical idea of the application lies in improving the smoothness and the fitness of the protective film under the premise of keeping the thickness unchanged.
It is easy to understand that, because the flexible protection film 100 has good flexibility, the flexible protection film 100 provided by the present application can also be applied to the surface of a small-sized entity, and has a high degree of adhesion and is not easy to warp.
In summary, the flexible protective film 100 provided by the present embodiment is not only suitable for an object with an uneven shape, but also suitable for protecting an entity with a smaller size, such as an electronic component.
It is easily understood that the flexible protective film 100 of the present application is characterized by its compliant and conformable property, and therefore, the process of preparing the substrate layer 1 does not employ a hot press molding process.
Common base material layer 1 materials are: PP, PET, PE, PVC, PC, OPP, etc.
Specifically, the first substrate layer 11 and the second substrate layer 12 of this implementation are both PET substrates, that is, the substrate layer 1 of this implementation is formed by combining two PET substrate layers.
PET (polyethylene terephthalate) with a chemical formula of (C)10H8O4)nThe polyester is prepared by exchanging dimethyl terephthalate with glycol ester or esterifying terephthalic acid with glycol to synthesize dihydroxy ethyl terephthalate, and then performing polycondensation reaction. The polyester belongs to crystalline saturated polyester, is a milky white or light yellow polymer with high crystallinity, has smooth and glossy surface, is a common resin in life, and can be divided into APET, RPET and PETG.
The PET substrate layer is a film material which is prepared by using polyethylene terephthalate as a raw material, manufacturing a thick sheet by adopting an extrusion method and performing biaxial tension. The film is colorless, transparent and glossy, has excellent mechanical performance, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature resistance, low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention, and is one of the commonly used barrier composite film base materials.
Since the thicker the thickness of the substrate layer 1 is, the less compliant and conformable the flexible protective film 100 will be, the thickness of the substrate layer 1 should be reduced as much as possible on the premise of satisfying the customer's needs.
In one possible implementation, the thickness of the first substrate layer 11 is set to be less than or equal to 38 μm; the thickness of the second substrate layer 12 is set to be less than or equal to 50 μm.
Alternatively, the thickness of the first base material layer 11 is set to 6 μm, 16 μm, 25 μm, 36 μm, or the like; the thickness of the second base material layer 12 is set to 25 μm, 50 μm, or the like.
In a possible implementation, the flexible protective film 100 further comprises a first glue layer 2; wherein, the two opposite sides of the first glue layer 2 are respectively used for gluing with the protected material and the first substrate layer 11.
Specifically, the first glue layer 2 is configured as a silicone adhesive layer.
The organic silicon adhesive belongs to a single-component semitransparent paste room-temperature curing adhesive and is a high-performance elastomer formed by natural curing. Has excellent cold and hot resistance, aging resistance and electric insulation performance, and has good adhesion to most of metal and non-metal materials.
Specifically, the first adhesive layer 2 is configured as a silicone pressure-sensitive adhesive layer.
Pressure Sensitive Adhesives (PSAs) are a class of adhesives that are sensitive to pressure. The pressure-sensitive adhesive is called pressure-sensitive adhesive, adhesive sticker and pressure-sensitive adhesive for short.
The organic silicon pressure-sensitive adhesive has good bonding strength and initial viscosity of common pressure-sensitive adhesives, and basically comprises organic silicon rubber, organic silicon resin, a condensation catalyst, a cross-linking agent, a filler, an organic solvent and other additives. The organic silicon pressure-sensitive adhesive mainly comprises the following types, including solvent type, high solid content type, solvent-free type, hot melt type and emulsion type organic silicon pressure-sensitive adhesives.
In specific implementation, before the application of the silicone pressure-sensitive adhesive, the surface of the first substrate layer 11 needs to be treated by a chemical, electrical or plasma method or a layer of primer is coated on the surface of the first substrate layer 11, so that the silicone pressure-sensitive adhesive is more firmly bonded with the first substrate layer 11.
In a possible implementation manner, the first substrate layer 11 and the second substrate layer 12 are tightly bonded together by glue to enhance the structural stability of the substrate layer 1.
Specifically, the composite laminated structure further includes a second glue layer 13; wherein, two opposite surfaces of the first base material layer 11 are respectively glued with the first glue layer 2 and the second glue layer 13; the first substrate layer 11 and the second substrate layer 12 are glued together by the second glue layer 13.
Specifically, the second adhesive layer 13 is an acrylic adhesive layer.
The acrylic adhesive is an adhesive with unique performance and wide application range. According to the form and application characteristics of the adhesive, the adhesive can be divided into a solvent type, an emulsion type, a reaction type, a pressure-sensitive type, an instant drying type, an anaerobic type, a photosensitive type, a hot-melt type and the like. From the classification, the application range of the diacidic adhesive is very wide, and all metal and nonmetal materials can be bonded by the acrylic adhesive. Wherein, pressure-sensitive adhesive, anaerobic adhesive, photosensitive adhesive, hot melt adhesive and the like basically form a system by self.
The raw material of the second adhesive layer 13 in this implementation is selected from a group of acrylic adhesives with higher viscosity.
Specifically, the tackiness of the second adhesive layer 13 is greater than or equal to 1000 g/25 mm.
Specifically, the second adhesive layer 13 is made of an acrylic adhesive.
Acrylic, also called PMMA or perspex, is derived from acrylic, the english chemical name polymethyl methacrylate.
Acrylic adhesive has convenient to use, fixes a position fast, and bonding strength is high, and the cured product is nontoxic advantage such as, can closely bond two PET substrate layer (first substrate layer 11, second substrate layer 12) together.
In a possible implementation manner, in order to prevent the adhesives of the first adhesive layer 2 and the second adhesive layer 13 from overflowing and causing adhesion of the sheets, the length of the first adhesive layer 2 is set to be less than or equal to the length of the first substrate layer 11; setting the width of the first glue layer 2 to be less than or equal to the width of the first base material layer 11; setting the length of the second adhesive layer 13 to be less than or equal to the length of the first substrate layer 11 and less than or equal to the length of the second substrate layer; the width of the second adhesive layer 13 is set to be less than or equal to the width of the first substrate layer 11 and less than or equal to the width of the second substrate layer 12.
Specifically, the flexible protective film 100 further includes a peeling layer 3; wherein, the stripping layer 3 is jointed with the first substrate layer 11 through the first glue layer 2.
The isolation layer 3 can ensure that the flexible protective film 100 is not scratched or damaged by external force before use, thereby ensuring the product quality. When the flexible protective film is pasted, the isolation layer 3 is peeled off, and the flexible protective film 100 can be well adsorbed on the surface of a protected material through the first glue layer 2.
Optionally, the peeling layer 3 is disposed as a release film 3 to reduce the peeling strength between the peeling layer 3 and the first glue layer 2.
Alternatively, the release film 3 may be a PE release film, a PET release film, an OPP release film, a PC release film, a PS release film, a PMMA release film, a BOPP release film, a PE release film, or the like.
In one possible implementation manner, the peeling layer 3 is a common PET film or a non-silicon release film or a fluorine release film, and the first adhesive layer 2 is configured as a silica gel adhesive layer.
In another possible implementation manner, the adhesive of the first adhesive layer 2 is an acrylic adhesive, and the release layer 3 is configured as a release film containing silicon.
To more clearly illustrate the structure of the flexible protection film 100 and the beneficial effects thereof, the process for preparing the flexible protection film 100 will be further described with reference to fig. 2.
The method for preparing the flexible protective film 100 comprises the following steps:
step S1: providing a first substrate layer 11;
step S2: coating a second adhesive layer 13 on one surface of the first substrate layer 11, and drying;
step S3, providing a second base material layer 12;
step S4: bonding the second substrate layer 12 and the first substrate layer 11 through a second adhesive layer 13;
step S5: coating the other surface of the first base material layer 11 with a first glue layer 2, and drying;
step S6: providing a release layer 3; and
step S7: the peeling layer 3 and the first substrate layer 11 are bonded by the first adhesive layer 2.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents and the like that are within the spirit and scope of the present application should be included.
Claims (10)
1. The flexible protective film (100) is used for being attached to the surface of a protected material, and the flexible protective film (100) comprises a base material layer (1);
wherein the substrate layer (1) is configured as a composite laminate structure;
wherein the composite laminated structure comprises a first substrate layer (11) and a second substrate layer (12) which are attached to each other.
2. The flexible protective film (100) according to claim 1, wherein:
the first base material layer (11) and the second base material layer (12) are both polyethylene terephthalate base materials.
3. The flexible protective film (100) according to claim 2, wherein:
the thickness of the first base material layer (11) is set to be less than or equal to 38 mu m; the thickness of the second base material layer (12) is set to be less than or equal to 50 [ mu ] m.
4. The flexible protective film (100) according to claim 1, wherein the flexible protective film (100) further comprises a first glue layer (2);
wherein, two opposite sides of the first glue layer (2) are respectively used for gluing with the protected material and the first substrate layer (11).
5. The flexible protective film (100) according to claim 4, wherein the first glue layer (2) is configured as a silicone adhesive layer.
6. The flexible protective film (100) according to claim 4, wherein the composite laminated structure further comprises a second glue layer (13);
the two opposite surfaces of the first base material layer (11) are respectively glued with the first glue layer (2) and the second glue layer (13); the first substrate layer (11) and the second substrate layer (12) are glued together through the second glue layer (13).
7. The flexible protective film (100) according to claim 6, wherein the second glue layer (13) is an acrylic glue layer.
8. Flexible protective film (100) according to claim 7, characterized in that said second layer of glue (13) has a viscosity greater than or equal to 1000 g/25 mm.
9. The flexible protective film (100) according to claim 8, wherein:
the length of the first glue layer (2) is less than or equal to that of the first base material layer (11); the width of the first adhesive layer (2) is less than or equal to that of the first base material layer (11);
the length of the second adhesive layer (13) is less than or equal to that of the first base material layer (11) and less than or equal to that of the second base material layer;
the width of the second glue layer (13) is smaller than or equal to the width of the first base material layer (11) and smaller than or equal to the width of the second base material layer (12).
10. The flexible protective film (100) according to claim 4, further comprising a release layer (3);
wherein the stripping layer (3) is attached to the first substrate layer (11) through the first adhesive layer (2);
wherein the stripping layer (3) is arranged as a release film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123111958.2U CN216786036U (en) | 2021-12-10 | 2021-12-10 | Flexible protective film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123111958.2U CN216786036U (en) | 2021-12-10 | 2021-12-10 | Flexible protective film |
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| CN216786036U true CN216786036U (en) | 2022-06-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106727A (en) * | 2021-12-10 | 2022-03-01 | 江苏皇冠新材料科技有限公司 | Flexible protective film and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106727A (en) * | 2021-12-10 | 2022-03-01 | 江苏皇冠新材料科技有限公司 | Flexible protective film and preparation method thereof |
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