A hot melt adhesive film for easy bonding

Abstract

The utility model relates to hot melt adhesive film technical field, specifically disclose a hot melt adhesive film convenient to bond, including bottom layer, the bottom surface of bottom layer is bonded with surface layer, the bottom surface of surface layer is provided with the convex point that is evenly arranged and is in circular platform state, the bottom surface of surface layer is suppressed with a few flow guide grooves, the bottom surface of surface layer is bonded with release paper through convex point, the bottom surface of release paper is provided with positioning line, the cross section shape of flow guide groove is trapezoidal, can provide the guiding effect to the flow of the colloid after heating, the bottom surface of release paper is provided with the easy tearing structure of segmented arrangement, can let release paper have the advantage that easily tear, the upper surface of bottom layer covers substrate reinforcing layer, and the material of substrate reinforcing layer is polyester fiber non - woven fabric, is used for strengthening the intensity of bottom layer whole, the material of surface layer is pressure -sensitive resin material, the convex point is formed integrally by the material of surface layer, and the convex point and surface layer have certain tackiness under normal temperature, can be used for preliminary positioning use.

Description

Technical Field

[0001] This utility model relates to the field of hot melt adhesive film technology, specifically a hot melt adhesive film that is easy to bond. Background Technology

[0002] Hot melt adhesive film is a special type of adhesive that is solid at room temperature and resembles a thin film in appearance, but it is essentially an adhesive rather than a film, primarily used for bonding items together. When exposed to high temperatures, it melts and becomes sticky on both sides. The working principle of the hot melt adhesive sticks we commonly use in daily life is very similar to that of hot melt adhesive film.

[0003] Although films and hot melt adhesive films share similarities in the materials field, both being made of thermoplastic polymers, they are fundamentally different. Films primarily function as barrier and packaging materials, while the core function of hot melt adhesive films is bonding.

[0004] However, traditional hot melt adhesive films have significant drawbacks in use. Because they lack adhesive strength at room temperature, manual pressing or the use of magnetic clamps, positioning pins, or other auxiliary tools is often required to prevent misalignment during bonding. More importantly, traditional hot melt adhesive films require the release paper to be completely removed before alignment, a process highly susceptible to misalignment. Misalignment leads to inaccurate bonding positions, necessitating rework, severely impacting operational efficiency, and causing numerous inconveniences in production and use. Utility Model Content

[0005] To overcome the technical defects of the existing technology, this utility model provides a hot melt adhesive film that is easy to position quickly, has a certain viscosity at room temperature, and is easy to bond.

[0006] The technical solution adopted by this utility model is: a hot melt adhesive film that is easy to bond, including a bottom layer, a top layer bonded to the bottom surface of the bottom layer, a top layer with evenly arranged and frustum-shaped protrusions on the bottom surface of the top layer, a number of flow channels pressed on the bottom surface of the top layer, and a release paper bonded to the bottom of the top layer through the protrusions, with positioning lines on the bottom surface of the release paper.

[0007] Preferably, the cross-sectional shape of the guide channel is trapezoidal, which can guide the flow direction of the heated colloid.

[0008] Preferably, the bottom surface of the release paper is provided with a segmented, easy-tear structure, which gives the release paper the advantage of being easy to tear.

[0009] Preferably, the upper surface of the bottom layer is covered with a substrate reinforcement layer, the substrate reinforcement layer being made of polyester fiber nonwoven fabric, which is used to enhance the overall strength of the bottom layer.

[0010] Preferably, the surface layer is made of pressure-sensitive resin, and the bumps are integrally formed from the surface layer material. The bumps and the surface layer are obtained by modifying the hot melt adhesive matrix to obtain pressure-sensitive resin bumps and the surface layer. They have a certain degree of adhesion at room temperature and can be used for preliminary positioning.

[0011] Preferably, the bottom surface of the release paper is provided with positioning lines, which allows staff to visually locate and use it for initial purposes.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting a surface layer, the bottom layer can have a certain degree of adhesion at room temperature during bonding, which makes it easy for workers to quickly position or fine-tune. With the combination of protrusions and guide channels, the surface layer can guide the flow of adhesive after bonding, avoiding excessive adhesive overflow. The substrate reinforcement layer can improve the overall strength of the bottom layer.

[0014] 2. The release paper and its bottom positioning lines and easy-tear structure are pre-pressed to facilitate the positioning of the colloid body. The easy-tear structure and the gap between the release paper and the surface layer make the release paper easier to tear, making the overall operation more convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a side view of the structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the surface structure of this utility model from a bottom view.

[0018] Figure 4 This is a schematic diagram of the release paper structure of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Guide channel; 2. Substrate reinforcement layer; 3. Bottom layer; 4. Top layer; 5. Raised dots; 6. Release paper; 7. Positioning line; 8. Easy-tear structure. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1-4As shown, this embodiment provides a convenient hot melt adhesive film, including a bottom layer 3. The bottom layer 3 is made of a hot melt adhesive matrix. The bottom layer 3 is a commonly used material, making it easy to modify. A top layer 4 is bonded to the bottom surface of the bottom layer 3. The bottom surface of the top layer 4 has evenly arranged, frustum-shaped protrusions 5. Several flow channels 1 are pressed onto the bottom surface of the top layer 4. Release paper 6 is bonded to the bottom of the top layer 4 through the protrusions 5. Positioning lines 7 are provided on the bottom surface of the release paper 6. The cross-sectional shape of the flow channels 1 is trapezoidal, which can guide the flow direction of the heated adhesive. The bottom surface of the release paper 6 has segmented easy-tear structures 8, which makes the release paper 6 easy to tear. The upper surface is covered with a substrate reinforcement layer 2, which is made of polyester fiber non-woven fabric and is used to enhance the overall strength of the bottom layer 3. The protrusions 5 and the surface layer 4 are made of pressure-sensitive resin. The protrusions 5 are integrally formed from the material of the surface layer 4. The protrusions 5 and the surface layer 4 have a certain degree of adhesion at room temperature and can be used for preliminary positioning. The bottom layer is made of hot melt adhesive matrix. The bottom layer is a commonly used material and is easy to modify.

[0022] Working Principle: During positioning and bonding, the positioning point is first identified on the workpiece. The positioning line 7 serves to confirm the position. Then, one section of the release paper 6 is easily peeled off using the easy-tear structure 8. The exposed surface layer 4 and the raised dots 5 are then aligned with the workpiece and bonded. During heat pressing, the surface layer 4 and raised dots 5 melt. The guide channel 1 guides the melted surface layer 4 and raised dots 5, preventing excessive residue buildup. To prevent glue overflow, the combination of protrusions 5 and guide channels 1 provides a dual reverse function of reducing adhesion during pre-bonding and increasing adhesion during hot pressing. The surface layer 4 allows the bottom layer 3 to maintain a certain level of adhesion at room temperature during bonding, facilitating quick positioning or fine-tuning by workers. The combination of protrusions 5 and guide channels 1 also helps guide the flow of adhesive after bonding, preventing excessive glue overflow. The substrate reinforcement layer 2 enhances the overall strength of the bottom layer 3.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of the invention. All such changes and modifications fall within the scope of the invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A convenient hot melt adhesive film, comprising a base layer (3), characterized in that: The bottom surface of the bottom layer (3) is bonded with a top layer (4). The bottom surface of the top layer (4) is provided with evenly arranged and frustum-shaped protrusions (5). Several flow channels (1) are pressed on the bottom surface of the top layer (4). Release paper (6) is bonded to the bottom of the top layer (4) through the protrusions (5).

2. The convenient hot melt adhesive film according to claim 1, characterized in that: The cross-sectional shape of the guide channel (1) is trapezoidal.

3. The convenient hot melt adhesive film according to claim 1, characterized in that: The bottom surface of the release paper (6) is provided with a segmented tear-resistant structure (8).

4. The convenient hot melt adhesive film according to claim 1, characterized in that: The upper surface of the bottom layer (3) is covered with a substrate reinforcement layer (2), which is made of polyester fiber nonwoven fabric.

5. The convenient hot melt adhesive film according to claim 1, characterized in that: The surface layer (4) is made of pressure-sensitive resin, and the protrusions (5) are integrally formed from the surface layer (4).

6. The convenient hot melt adhesive film according to claim 1, characterized in that: The bottom surface of the release paper (6) is provided with positioning lines (7).

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