A composite adhesive layer self-adhesive material and preparation method thereof

Abstract

The present invention relates to the field of self-adhesive preparation, and specifically to a composite adhesive layer self-adhesive material and a preparation method thereof. The composite adhesive layer self-adhesive material comprises glassine silicone oil paper, a first adhesive film layer, a second adhesive film layer, and a surface layer in sequence. The present invention is based on a structure of compounding different adhesive films, which can meet the special demand scenarios of self-adhesive materials and provide the self-adhesive materials with multiple properties. The composite adhesive film is applied by using a local adhesive film anilox roller and a global adhesive film anilox roller in cooperation with each other. A special adhesive film structure is formed by different anilox rollers, which can achieve the best compounding effect and obtain excellent multiple properties on the same adhesive surface.

Description

Technical Field

[0001] The invention relates to the field of self-adhesive adhesive preparation, and in particular to a composite adhesive layer self-adhesive material and a preparation method thereof. Background Art

[0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

[0003] Self-adhesive stickers are a type of solid glue. Molded self-adhesive stickers are made by pasting a whole piece of self-adhesive sticker on the surface and then pressing and cutting it into the required shape. Compared with traditional liquid glue, the self-adhesive stickers have lower colloid fluidity during the adhesion process and are more stable in adhesion. Moreover, the stickers will not dry out after a period of time, which would cause the stickers to fall off. At present, self-adhesive stickers are widely used in industries such as medical or food labeling.

[0004] At present, self-adhesive materials are divided into single-sided self-adhesive and double-sided self-adhesive. Adhesive films all have a single self-adhesive layer, which cannot meet some special needs. For example, in scenarios such as pasting low-freeze-resistant products and pasting two materials of different materials, a single type of self-adhesive layer cannot fully meet the pasting needs of different objects. Summary of the Invention

[0005] In response to the problem that a single type of self-adhesive layer in the prior art cannot fully meet the pasting requirements of different objects, the present invention provides a compound adhesive layer self-adhesive material. Based on different adhesive film compounding technologies, the adhesive film is coated using a local coating anilox roller in combination with a full coating anilox roller. This can effectively give the self-adhesive material a variety of properties, providing convenience for the production of self-adhesive materials in special demand scenarios.

[0006] A first aspect of the present invention provides a composite adhesive layer self-adhesive material, which comprises glassine silicone oil paper, a first adhesive film layer, a second adhesive film layer, and a surface layer in sequence.

[0007] A second aspect of the present invention provides a method for preparing a composite adhesive layer self-adhesive material, comprising:

[0008] The first film coating is performed on the silicone oil layer coated on the glassine silicone oil paper using anilox roller A, and the solvent is dried in a drying tunnel to form the first film layer;

[0009] Use anilox roller B to coat the first film layer with a second film, and after drying the solvent in a drying tunnel, form a second film layer;

[0010] The surface material is cold-compounded with glassine silicone oil paper coated with two adhesive film layers to complete the production of the composite adhesive layer self-adhesive material.

[0011] Among them, the anilox roller A is a partial film anilox roller or a full-area film anilox roller, and the anilox roller B is a full-area film anilox roller.

[0012] The beneficial effects achieved by one or more technical solutions of the present invention are as follows:

[0013] 1. The preparation method of the composite adhesive film self-adhesive material provided by the present invention selects different types of solvent-based glue for coating according to actual application requirements. Through the compounding of the adhesive layer, it can meet the special demand scenarios of the self-adhesive material and at the same time give the self-adhesive material a variety of properties, and is suitable for the preparation of single-sided self-adhesive materials and double-sided self-adhesive materials.

[0014] 2. The present invention adopts a local film anilox roller and a global film anilox roller to cooperate with each other to coat the compound film, bringing a new concept and technology for the production of self-adhesive stickers. Based on different film components, a special film structure is formed by different anilox rollers, which can achieve the best compounding effect and obtain excellent multiple properties on the same adhesive surface.

[0015] 3. The present invention adopts a segmented drying technology. After the two adhesive layers are coated in sequence, they are both dried in one step, which can ensure the technical properties of each film layer and ensure that the final prepared composite film self-adhesive material can achieve multiple properties at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 This is a schematic structural diagram of the self-adhesive material of the composite adhesive layer provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the local film anilox roller coating provided by the present invention.

[0019] Figure 3 Schematic diagram of the full-area film anilox roller coating provided by the present invention.

[0020] Figure 4 This is an enlarged schematic diagram of the textured structure on the anilox roller of the present invention.

[0021] Figure 5 This is a schematic diagram of a partial adhesive film being coated on the surface of glassine silicone oil paper during the preparation process of the single-sided self-adhesive material of the present invention.

[0022] Figure 6 This is a schematic diagram of the two-layer adhesive film structure observed on the glassine silicone oil paper side in the single-sided composite adhesive layer self-adhesive material of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of two adhesive films observed on the surface layer side in the single-sided composite adhesive layer self-adhesive material of the present invention.

[0024] Among them, 1. surface layer, 2-1. second film layer, 2-2. first film layer, 3. silicone oil layer, 4. glassine paper layer, 5. anilox roller A, 5-1. local anilox area, 5-2. non-anilox area, 6. anilox roller B, 6-1. anilox area, 7. mesh, 8. hole wall. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] In view of the problem that a single type of self-adhesive layer in the prior art cannot fully meet the requirements for pasting different objects, the present invention provides a composite adhesive layer self-adhesive material and a preparation method thereof.

[0028] A typical embodiment of the present invention provides a composite adhesive layer self-adhesive material, which comprises glassine silicone oil paper, a first adhesive film layer, a second adhesive film layer, and a surface layer in sequence.

[0029] The glassine silicone oil paper comprises a glassine paper layer and a silicone oil layer.

[0030] In some embodiments, the glassine silicone oil paper has a thickness of 50-500 microns and a peeling force of 0.03-0.05 N / 25 mm.

[0031] The composite adhesive layer self-adhesive material provided by the present invention can be tailored to the application scenario and the material of the adhesive object, allowing for the optimal adhesive effect by selecting and matching different adhesive films. For example, a self-adhesive film for room temperature use can be matched with a low-temperature resistant self-adhesive film; another example is a self-adhesive film for bonding PET plastics and a self-adhesive film for bonding metals. In some embodiments, the first and second adhesive film layers are solvent-based acrylic adhesives with different properties or functions.

[0032] In some embodiments, when the self-adhesive material is single-sided self-adhesive, paper or film material is used as the surface layer; when the self-adhesive material is double-sided self-adhesive, silicone-coated release paper is used as the surface layer, and the peeling force of the silicone-coated release paper is 0.15~0.20N / 25mm.

[0033] In some embodiments, the surface layer has a thickness of 50-500 microns.

[0034] Another embodiment of the present invention provides a method for preparing the above-mentioned composite adhesive layer self-adhesive material, which specifically includes:

[0035] The first film coating is performed on the silicone oil layer coated on the glassine silicone oil paper using anilox roller A, and the solvent is dried in a drying tunnel to form the first film layer;

[0036] The anilox roller B is used to coat the first film layer with a second film, and the solvent is dried in a drying tunnel to form a second film layer.

[0037] The surface material is cold-compounded with glassine silicone oil paper coated with two adhesive film layers to complete the production of the composite adhesive layer self-adhesive material.

[0038] In some embodiments, the anilox roller A is a partial film anilox roller or a full-area film anilox roller, and the anilox roller B is a full-area film anilox roller.

[0039] The structure of the local film anilox roller is as follows Figure 2 As shown, local textured areas (black matrix) and non-textured areas are evenly distributed on its surface, and the mesh count needs to be determined according to the amount of glue applied.

[0040] The structure of the full-area film anilox roller is as follows Figure 3 As shown, there are evenly distributed reticulated areas on its surface, and the mesh count of the reticulate area needs to be determined according to the amount of glue applied.

[0041] Figure 4 The mesh and hole wall are shown. The number of mesh holes depends on the mesh count of the anilox roller, that is, the number of mesh holes per square inch.

[0042] Based on the actual application of self-adhesive materials, two types of self-adhesive material coating schemes are designed: one is single-sided self-adhesive material; the other is double-sided self-adhesive material. Different types of anilox rollers A are used for coating for different types of self-adhesive materials. In some embodiments, when the self-adhesive material is single-sided self-adhesive, the anilox roller A used for coating the first adhesive film layer is a local adhesive film anilox roller, and the coating forms a pattern arrangement similar to a matrix pattern; wherein the matrix pattern can be designed in a variety of shapes according to specific needs, and the distribution density can also be adjusted according to the use environment of the self-adhesive material. When the self-adhesive material is double-sided self-adhesive, the anilox roller A is a full-area adhesive film anilox roller, that is, the pattern is evenly distributed on the cylindrical surface of the anilox roller.

[0043] For single-sided self-adhesive materials, in the design of the anilox roller, the focus is on considering that the adhesive layer should have different functions and uses of the first and second adhesive film layers. The anilox roller A is selected as the local adhesive film anilox roller to coat the first adhesive film layer. The local coating can avoid covering the entire second adhesive film layer and affecting the performance of the second adhesive film. The structure of the first adhesive film layer coated on the glassine silicone oil paper is as follows: Figure 5 As shown; the anilox roller B is a full-area film anilox roller, and the second full-area film coating is performed on the first film layer. The structure after the two layers of film coating is as shown Figure 6 、 7 shown.

[0044] For double-sided self-adhesive materials, the design of the anilox roller focuses on the optimal bonding effect between different adhesive layers and the adhesive object. Therefore, a full-area film anilox roller is selected to coat the first and second film layers respectively, and compounded with silicone oil paper layers with different release forces, which can effectively improve the bonding effect.

[0045] In some embodiments, the mesh number of the anilox roller A is 100-500 meshes, and the mesh number of the anilox roller B is 100-300 meshes.

[0046] In some embodiments, the drying temperature after the first film coating is 70-110° C., and the drying temperature after the second film coating is 75-120° C.

[0047] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0048] Example 1

[0049] This embodiment provides a method for preparing a single-sided composite adhesive film self-adhesive material, which is specifically as follows:

[0050] 1. Main Materials

[0051] (1) The surface layer is ordinary synthetic paper with a thickness of 75 microns;

[0052] (2) The backing paper is glassine silicone oil paper with a peeling force of 0.03N / 25mm;

[0053] (3) Adhesive: The first adhesive film layer uses a low-temperature resistant solvent-based acrylic glue, and the second adhesive film layer uses a solvent-based acrylic glue with a 180° peel strength greater than 0.50KN / m.

[0054] 2. Coating equipment and anilox roller

[0055] In this embodiment, the coating equipment is provided with two glue stations for coating and gluing. In this embodiment, a single-sided self-adhesive material with synthetic paper as the surface layer is produced. During the two film coatings, two anilox rollers are respectively used as a local coating anilox roller and a full-area coating anilox roller. The purpose is to make the composite film self-adhesive not only have the characteristics of low-temperature labeling resistance, but also have a high peel strength bonding ability (usually, due to the limitations of monomer selection during the polymerization preparation process of acrylic glue, if high peel strength is pursued, the initial adhesion of the film will be poor and the low-temperature adhesion effect will be poor; if good initial adhesion and good low-temperature adhesion effect are pursued, the peel strength of the pressure-sensitive adhesive produced will be weak). The production method of using this composite film coating can give the film the characteristics of both low-temperature resistance and high peel strength, which can better meet the use in special environments.

[0056] In this embodiment, during coating, the first film layer is coated with a local coating anilox roller with a mesh number of 200; the second film layer is coated with a full-area coating anilox roller with a mesh number of 300.

[0057] 3. Production process

[0058] (1) On the coating equipment, the glassine silicone oil paper is installed on the unwinding shaft and passes through the roller of the paper feeding path and the first glue station. The silicone oil film on the glassine silicone oil paper is coated on the glue surface toward the anilox roller. After the glue surface is coated, it enters the first drying tunnel for heating and drying. The drying temperature is set at 90 ° C. After drying, the local coating of the first glue film layer is completed.

[0059] (2) The glassine silicone oil paper coated with the first film layer is passed through the second glue station, with the first film layer facing the anilox roller to coat the glue surface. After coating the second layer of glue surface, it enters the second drying tunnel for heating and drying. The drying temperature is set to 100°C. After drying, the second film layer is fully coated.

[0060] (3) The surface material synthetic paper roll installed on the coating equipment is unwound, cold-compounded with the glassine silicone oil paper coated with two adhesive film layers, and rewound to complete the preparation of the single-sided composite adhesive film self-adhesive material.

[0061] In order to verify the performance of the single-sided composite adhesive film self-adhesive material prepared in this example, the initial tack, sustained tack, 180° peel strength, and -20±3°C initial tack were tested on the first adhesive film layer, the second adhesive film layer, and the composite adhesive film prepared in this example. The specific test results are as follows:

[0062] Table 1

[0063]

[0064] The test results show that the initial tack, sustained tack and 180° peel strength of the compounded film at room temperature are slightly lower than those of the second film layer, but are all significantly improved compared to those of the first film layer; the initial tack at low temperature is significantly improved compared to the second film layer, and is even comparable to that of the first film layer, indicating that the single-sided compounded film self-adhesive material of this embodiment can have both low-temperature resistance and high peel strength properties.

[0065] Example 2

[0066] This embodiment provides a method for preparing a double-sided composite adhesive film self-adhesive material, which is specifically as follows:

[0067] 1. Main Materials

[0068] (1) The surface layer is glassine silicone oil paper with a thickness of 70 microns and a peeling force of 0.05N / 25mm;

[0069] (2) The backing paper is glassine silicone oil paper with a thickness of 70 μm and a peeling force of 0.20 N / 25 mm;

[0070] (3) Adhesive: The first adhesive film layer uses solvent-based acrylic glue for bonding metal surfaces, and the second adhesive film layer uses solvent-based acrylic glue for bonding non-metal surfaces.

[0071] 2. Coating equipment and anilox roller

[0072] In this embodiment, the coating equipment is provided with two glue stations for coating and gluing. In this embodiment, a double-sided self-adhesive material with glassine silicone oil paper as the surface layer is produced. When the compound film coating is selected, both the two anilox rollers adopt the full-area coating anilox roller. The purpose is to make the compound film self-adhesive not only good at sticking to the metal surface, but also have the ability to stick to the surface of non-metallic materials (usually, due to the limitations of monomer selection during the polymerization preparation process of acrylic glue, if the adhesion effect on the metal surface is pursued, the adhesion effect of the film on the non-metallic surface will be poor; if the adhesion performance on the non-metallic surface is pursued, the adhesion strength of the pressure-sensitive film on the metal surface will be weak). This production method of compound film coating is used to give the two adhesive surfaces of the film good adhesion performance to both metal and non-metallic surfaces, which better meets the bonding and compounding requirements of metal and non-metallic materials.

[0073] During coating in this embodiment, the first film layer is coated with a 300-mesh anilox roller; the second film layer is coated with a 100-mesh anilox roller.

[0074] 3. Production process:

[0075] (1) On the coating equipment, the glassine silicone oil paper is installed on the unwinding shaft and passes through the roller of the paper feeding path and the first glue station. The silicone oil film on the glassine silicone oil paper is coated on the glue surface toward the anilox roller. After the glue surface is coated, it enters the first drying tunnel for heating and drying. The drying temperature is set to 110 ° C. After drying, the first glue film layer is formed.

[0076] (2) The glassine silicone oil paper coated with the first adhesive film layer passes through the second adhesive station, with the first adhesive film layer facing the anilox roller to coat the adhesive surface. After coating the second adhesive layer, it enters the second drying tunnel for heating and drying. The drying temperature is set to 75°C, and the second adhesive film layer is formed after drying.

[0077] (3) The glassine silicone oil paper surface layer installed on the coating equipment is cold-compounded with the bottom paper glassine silicone oil paper coated with two adhesive film layers, and the rolls are rolled to complete the preparation of the double-sided composite adhesive film self-adhesive material.

[0078] In order to verify the performance of the double-sided composite adhesive film self-adhesive material prepared in this embodiment, the first adhesive film layer, the second adhesive film layer, and the composite adhesive film prepared in this embodiment were tested for their adhesion properties on metal surfaces and non-metal surfaces. The specific test results are as follows:

[0079] When the first film layer is bonded to the 304 stainless steel metal surface, the test results are:

[0080] (1) Shear force: 15970 J / m 2

[0081] (2) Tensile strength 4680N / m 2

[0082] When the first film layer is used to bond the ABS non-metal surface, the test results are:

[0083] (1) Shear force: 4228 J / m 2

[0084] (2) Tensile strength 2155N / m 2

[0085] When the second film layer is bonded to the ABS non-metal surface, the test results are:

[0086] (1) Shear force: 12830 J / m 2

[0087] (2) Tensile strength 4320N / m 2

[0088] When the second film layer is used to bond the 304 stainless steel metal surface, the test results are:

[0089] (1) Shear force: 3205J / m 2

[0090] (2) Tensile strength 2319N / m 2

[0091] The double-sided composite adhesive film prepared in this example was adhered to a 304 stainless steel surface and a plastic ABS surface according to different adhesive surfaces to perform a peeling test.

[0092] (1) Shear force: 14027 J / m 2

[0093] (2) Tensile strength 4517N / m 2

[0094] Test results show that the resulting composite film exhibits superior shear and tensile strength at room temperature compared to using either film alone to bond 304 stainless steel and ABS plastic surfaces. The composite film method of the present invention effectively leverages the advantages of the two different films, offsetting the disadvantages of using either film alone, and achieving excellent bonding results.

[0095] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A composite adhesive layer self-adhesive material, characterized by: It includes glassine silicone oil paper, a first adhesive film layer, a second adhesive film layer, and a surface layer in sequence; The preparation method is: The first film coating is performed on the silicone oil layer coated on the glassine silicone oil paper using anilox roller A, and the solvent is dried in a drying tunnel to form the first film layer; The anilox roller B is used to coat the first film layer with a second film, and the solvent is dried in a drying tunnel to form a second film layer. The surface material is cold-compounded with glassine silicone oil paper coated with two adhesive film layers to complete the production of the composite adhesive layer self-adhesive material; Anilox roller A is a partial film anilox roller or a full film anilox roller, and anilox roller B is a full film anilox roller; When the self-adhesive material is single-sided self-adhesive, the anilox roller A is a partial film anilox roller; when the self-adhesive material is double-sided self-adhesive, the anilox roller A is a full-area film anilox roller.

2. The self-adhesive material for the composite adhesive layer according to claim 1, characterized in that: The glassine silicone oil paper has a thickness of 50-500 microns and a peeling force of 0.03-0.05 N / 25 mm.

3. The self-adhesive material for the composite adhesive layer according to claim 1, characterized in that: The first adhesive film layer and the second adhesive film layer are solvent-based acrylic adhesives with different properties or functions.

4. The self-adhesive material for the composite adhesive layer according to claim 1, characterized in that: When the self-adhesive material is single-sided, paper or film material is used as the surface layer; when the self-adhesive material is double-sided, silicone-coated release paper is used as the surface layer.

5. The composite adhesive layer self-adhesive material according to claim 1, characterized in that: The thickness of the surface layer is 50-500 microns.

6. The self-adhesive material for the composite adhesive layer according to claim 1, characterized in that: The mesh number of anilox roller A is 100-500 mesh, and the mesh number of anilox roller B is 100-300 mesh.

7. The self-adhesive material for the composite adhesive layer according to claim 1, characterized in that: The drying temperature after the first film coating is 70-110°C, and the drying temperature after the second film coating is 75-120°C.

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