Anti-slip film with three-dimensional embossed structure

Abstract

The utility model relates to the technical field of composite function film, specifically relates to an antiskid film with three -dimensional embossing structure, and the utility model provides an antiskid film with three -dimensional embossing structure, including flexible base material layer and the three -dimensional embossing structure of setting in the substrate layer surface, the three -dimensional embossing structure is formed by the embossing unit of periodic arrangement, and each embossing unit includes the integral center main convex and the secondary convex around the main convex, the main convex is truncated cone structure, and its top surface is plane or slightly concave curved surface, the height of secondary convex is lower than the main convex, and it is prismatic platform shape, the embossing unit is separated through the honeycomb net -like groove between, and the net -like groove depth is 30%~70% of the secondary convex height.

Description

Technical Field

[0001] This utility model relates to the field of composite functional film technology, specifically to an anti-slip film with a three-dimensional embossed structure. Background Technology

[0002] Anti-slip films with 3D embossed structures are functional films that enhance surface friction by creating a three-dimensional raised structure on the surface of a substrate layer. Their core function is to utilize the physical unevenness of the embossed structure to increase the contact area and contact resistance between the film and the contact surface (such as object surfaces, human skin, or other materials), thereby achieving an anti-slip function. These films are widely used in packaging (such as protective packaging for precision instruments), medical applications (such as anti-slip mats for surgical instruments), and electronics (such as mobile phone screen protectors), where high surface friction performance is required.

[0003] However, existing anti-slip films of this type have the following problems: First, traditional embossed structures are mostly simple planar protrusions or columnar structures of a single height. The anti-slip performance depends on the number and height of the protrusions, but when subjected to localized force, stress concentration can easily cause the protrusions to break, and the anti-slip performance will significantly decrease after long-term use. Second, the embossed layer and the substrate layer are mostly bonded together with adhesives, resulting in insufficient interfacial bonding. Delamination is likely to occur in high-temperature or humid environments. Third, the arrangement of the embossed structure lacks regularity, leading to uneven overall mechanical properties of the film, and making it difficult to balance flexibility and tear resistance. Utility Model Content

[0004] The purpose of this invention is to provide an anti-slip film with a three-dimensional embossed structure. Through multi-dimensional structural design, the anti-slip performance, interfacial bonding force, and structural stability are optimized, solving the problems of easy wear, weak bonding, uneven mechanical properties, and insufficient adhesion of traditional anti-slip films.

[0005] The present invention provides an anti-slip film with a three-dimensional embossed structure, comprising a flexible substrate layer and a three-dimensional embossed structure disposed on the surface of the substrate layer. The three-dimensional embossed structure is composed of periodically arranged embossed units, each embossed unit including an integral central main protrusion and secondary protrusions surrounding the main protrusion; the main protrusion has a truncated cone structure, and its top surface is a plane or a slightly concave curved surface; the height of the secondary protrusions is lower than that of the main protrusions, and they are frustum-shaped; the embossed units are separated by honeycomb-shaped mesh grooves, the depth of which is 30% to 70% of the height of the secondary protrusions.

[0006] As a preferred embodiment of this utility model, the substrate layer is a transparent or semi-transparent thermoplastic polyurethane material with a thickness of 0.1 to 0.5 mm; the three-dimensional embossed structure is a polyethylene or polypropylene modified material co-extruded with the substrate layer.

[0007] As a preferred embodiment of this utility model, the angle α between the sidewall of the main protrusion and the plane of the substrate layer is 60° to 85°, the angle β between the sidewall of the secondary protrusion is 45° to 75°, and α > β.

[0008] As a preferred embodiment of this utility model, the embossing units are distributed in a honeycomb array on the surface of the substrate layer, and the spacing between adjacent embossing units is 10-20mm.

[0009] As a preferred embodiment of this utility model, the top surface of the main protrusion is provided with radial grooves, the depth of which is 5-50 μm and the width is 10-100 μm.

[0010] As a preferred embodiment of this utility model, the secondary protrusion surface is embedded with silica anti-slip microparticles, the particle size of which is 10-100μm and the exposed height is 20%-50% of the particle size.

[0011] As a preferred technical solution of this utility model, the back of the substrate layer is provided with a negative pressure suction cup structure corresponding to the position of the three-dimensional embossed structure. The negative pressure suction cup structure is a groove-shaped storage groove of a truncated cone. The depth of the negative pressure suction cup structure is greater than the height of the main protrusion, and the negative pressure suction cup structure and the secondary protrusion can be interlocked.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1. Optimized anti-slip performance: The three-dimensional embossed structure adopts an integrated design of main protrusions and secondary protrusions. The main protrusions provide the main support force, while the secondary protrusions further improve the coefficient of friction by increasing the number of contact points. The radial grooves on the main top surface and the silica particles on the surface of the secondary protrusions can increase the surface roughness. During dynamic contact, energy is dissipated through the sliding of the particles, which significantly improves the anti-slip durability.

[0014] 2. Enhanced structural stability: The honeycomb array distribution of the embossed units and the partitioning design of the mesh grooves ensure that the stress is evenly distributed when the three-dimensional embossed structure is subjected to force, avoiding fracture caused by local stress concentration; the difference in the included angle between the main protrusion and the secondary protrusion (α>β) optimizes the impact resistance of the structure, and can still maintain stable anti-slip performance after long-term use.

[0015] 3. Enhanced interfacial bonding: The three-dimensional embossed structure and the substrate layer are co-extruded, avoiding the use of adhesives. The interfacial bonding strength is high and can withstand harsh environments such as high temperature (-40℃~120℃) and humidity, preventing delamination failure.

[0016] 4. Improved dynamic adhesion: The negative pressure suction cup structure on the back of the substrate layer interlocks with the secondary protrusions of the three-dimensional embossed structure. When the film is attached to a curved or multi-arc surface, the suction cup structure can be adsorbed onto the contact surface through elastic deformation. At the same time, the interlocking effect of the secondary protrusions restricts the film from sliding, thus achieving adaptive adhesion.

[0017] 5. Retention of optical properties: The substrate layer is made of transparent or semi-transparent TPU material, which not only ensures the light transmittance of the film (suitable for packaging scenarios that require observation of the internal contents), but also improves the tear resistance and flexibility of the film through the high elasticity of TPU. Attached Figure Description

[0018] Figure 1 This is a top structural diagram of an anti-slip film with a three-dimensional embossed structure according to the present invention.

[0019] Figure 2 This is a bottom structural diagram of an anti-slip film with a three-dimensional embossed structure according to the present invention.

[0020] Figure 3 This is a cross-sectional three-dimensional structural view of the embossed unit of an anti-slip film with a three-dimensional embossed structure according to the present invention.

[0021] As shown in the figure:

[0022] 1. Flexible substrate layer; 2. Embossed unit; 3. Central main protrusion; 4. Secondary protrusion; 5. Mesh groove; 6. Silica anti-slip microparticles; 7. Negative pressure suction cup structure. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1:

[0026] As per the instruction manual Figure 1-2 As shown, an anti-slip film with a three-dimensional embossed structure includes a flexible substrate layer 1 and a three-dimensional embossed structure disposed on the surface of the substrate layer. The substrate layer is made of transparent or semi-transparent thermoplastic polyurethane material with a thickness of 0.3 mm.

[0027] In this utility model, the three-dimensional embossed structure is composed of periodically arranged embossed units 2. The embossed units 2 are distributed in a honeycomb array on the surface of the substrate layer. The spacing between adjacent embossed units 2 is 20mm. The three-dimensional embossed structure is made of polyethylene or polypropylene modified material co-extruded with the substrate layer. The embossed units 2 are separated by honeycomb-shaped mesh grooves 5. The depth of the mesh grooves 5 is 30% of the height of the secondary protrusions 4.

[0028] In this utility model, a negative pressure suction cup structure 7 corresponding to the position of the three-dimensional embossed structure is provided on the back of the substrate layer. The negative pressure suction cup structure 7 is a groove-shaped storage groove of a truncated cone. The depth of the negative pressure suction cup structure 7 is greater than the height of the main protrusion, and the negative pressure suction cup structure 7 and the secondary protrusion 4 can be interlocked.

[0029] As per the instruction manual Figure 3 As shown, each embossing unit 2 includes an integral central main protrusion 3 and secondary protrusions 4 surrounding the main protrusion. The main protrusion has a truncated cone structure, and its top surface is a plane or a slightly concave curved surface. The top surface of the main protrusion is provided with radial grooves, the depth of which is 50μm and the width of which is 50μm.

[0030] In this invention, the height of the secondary protrusion 4 is lower than that of the main protrusion, and the secondary protrusion 4 is in the shape of a frustum. The surface of the secondary protrusion 4 is embedded with silica anti-slip microparticles 6. The particle size of the silica anti-slip microparticles 6 is 50 μm, and the exposed height is 20% to 50% of the particle size.

[0031] In this invention, the angle α between the sidewall of the main protrusion and the plane of the substrate layer is 60° to 85°, and the angle β between the sidewall of the secondary protrusion 4 is 45° to 75°, and α > β.

[0032] Working principle

[0033] 1. Static anti-slip: When the film comes into contact with the contact surface (such as the surface of an object), the main protrusion provides basic support as the main load-bearing structure, and the secondary protrusion 4 further increases the contact pressure per unit area; the silica particles on the surface of the secondary protrusion 4 directly rub against the contact surface, and the high hardness (Mohs hardness 7) and rough surface characteristics of the particles enhance the friction resistance.

[0034] 2. Dynamic anti-slip: When relative sliding occurs between the contact surfaces, the radial grooves on the main top surface can guide the lubricating medium (such as water or oil) to diffuse towards the edge, reducing the interface lubrication effect; at the same time, the frustum-shaped structure of the secondary protrusion 4 undergoes elastic deformation during sliding, dissipating sliding energy through minute deformation and delaying wear.

[0035] 3. Interface bonding: When the negative pressure suction cup structure 7 on the back of the substrate layer contacts a curved or multi-arc surface, it tightly bonds with the contact surface through its own elastic deformation (the elastic modulus of TPU is about 0.5 to 2 MPa). At the same time, the depth of the suction cup structure is greater than the height of the main protrusion (the height of the main protrusion is 100 μm and the depth of the suction cup is 120 μm), ensuring that the secondary protrusion 4 is completely embedded in the microstructure of the contact surface, forming a "mechanical locking" effect to prevent the film from sliding. In addition, the presence of air inside facilitates separation.

[0036] 4. Structural durability: The honeycomb array distribution of the embossed unit 2 and the partitioning design of the mesh groove 5 allow the stress of the three-dimensional embossed structure to be dispersed to the adjacent embossed unit 2 through the mesh groove 5 when under stress, avoiding single-point overload fracture; the difference in the included angle between the main protrusion and the secondary protrusion 4 (α>β) allows the secondary protrusion 4 to deform preferentially to absorb energy when the structure is under pressure, while the main protrusion maintains stable support, extending the overall service life.

[0037] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. An anti-slip film with a three-dimensional embossed structure, comprising a flexible substrate layer (1) and a three-dimensional embossed structure disposed on the surface of the substrate layer, characterized in that: The three-dimensional embossed structure is composed of periodically arranged embossed units (2), each embossed unit (2) including an integral central main protrusion (3) and secondary protrusions (4) surrounding the main protrusion; The main protrusion has a truncated cone structure, and its top surface is a plane or a slightly concave curved surface; The secondary protrusion (4) is lower in height than the main protrusion and is truncated pyramidal in shape; The embossing units (2) are separated by honeycomb-shaped mesh grooves (5), the depth of which is 30% to 70% of the height of the secondary protrusions (4).

2. The anti-slip film with a three-dimensional embossed structure according to claim 1, characterized in that: The substrate layer is made of transparent or semi-transparent thermoplastic polyurethane material with a thickness of 0.1 to 0.5 mm; the three-dimensional embossed structure is made of polyethylene or polypropylene modified material co-extruded with the substrate layer.

3. The anti-slip film with a three-dimensional embossed structure according to claim 1, characterized in that: The angle α between the sidewall of the main protrusion and the plane of the substrate layer is 60° to 85°, and the angle β between the sidewall of the secondary protrusion (4) is 45° to 75°, and α > β.

4. The anti-slip film with a three-dimensional embossed structure according to claim 1, characterized in that: The embossing units (2) are distributed in a honeycomb array on the surface of the substrate layer, and the spacing between adjacent embossing units (2) is 10-20 mm.

5. The anti-slip film with a three-dimensional embossed structure according to claim 1, characterized in that: The top surface of the main protrusion is provided with radial grooves, the depth of which is 5-50 μm and the width of which is 10-100 μm.

6. The anti-slip film with a three-dimensional embossed structure according to claim 1, characterized in that: The secondary protrusion (4) has silica anti-slip microparticles (6) embedded on its surface. The silica anti-slip microparticles (6) have a particle size of 10 to 100 μm and an exposed height of 20% to 50% of the particle size.

7. The anti-slip film with a three-dimensional embossed structure according to claim 1, characterized in that: The back of the substrate layer is provided with a negative pressure suction cup structure (7) corresponding to the position of the three-dimensional embossed structure. The negative pressure suction cup structure (7) is a groove-shaped storage groove of a truncated cone. The depth of the negative pressure suction cup structure (7) is greater than the height of the main protrusion, and the negative pressure suction cup structure (7) and the secondary protrusion (4) can be interlocked.

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