CN219342062U

CN219342062U - Composite adhesive film structure for bonding PVC and steel plate

Info

Publication number: CN219342062U
Application number: CN202320029823.1U
Authority: CN
Inventors: 杨少辉; 储江顺; 李薇薇; 毕宏海
Original assignee: Shanghai Bangzhong New Material Co ltd
Current assignee: Shanghai Bangzhong New Material Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-07-14
Anticipated expiration: 2033-01-06

Abstract

The application relates to a compound glued membrane structure for PVC bonds with steel sheet, including the transition layer, be used for with PVC layer first glued membrane layer and be used for with the second glued membrane layer of steel sheet bonding, first glued membrane layer and second glued membrane layer respectively the coating in the both sides of transition layer, the contact angle of first glued membrane layer is 90~100, the contact angle of second glued membrane layer is 75~ 85. The composite adhesive film structure has adhesive film layer structures with different performances, and can stably adhere the PVC layer to the steel plate to obtain the high-quality PVC coated steel plate.

Description

Composite adhesive film structure for bonding PVC and steel plate

Technical Field

The application relates to the field of adhesive films, in particular to a composite adhesive film structure for bonding PVC and a steel plate.

Background

The PVC coated steel plate has excellent weather resistance, corrosion resistance, chemical resistance and anti-fouling capability, has excellent ultraviolet resistance, is bonded by using a polymer adhesive film, is environment-friendly in production process, has no VOC emission and is increasingly popular. The PVC film-coated steel plate is formed by coating a layer of PVC film on the surface of the steel plate and compounding the PVC film by hot pressing a polymer adhesive film. From the production process of the PVC film-coated steel plate, the PVC film needs a polymer adhesive film to be attached to the steel plate, and finally the film-coated metal plate is formed through cooling and shaping. The effect of the polymer adhesive film is that the polymer adhesive film can be adhered to the PVC film and the steel plate. PVC and steel sheet are as two different types of materials, and two kinds of materials are simultaneously bonded and put forward very high demands on the polymer adhesive film, often hardly use the polymer adhesive film of same component to reach the purpose of bonding these two kinds of materials. Therefore, the novel composite adhesive film structure for bonding the PVC film and the steel plate is provided to solve the technical problems.

Disclosure of Invention

In order to solve the problem that the conventional common adhesive cannot bond a PVC film and a steel plate well, the application provides a composite adhesive film structure for bonding PVC and the steel plate.

The application provides a composite adhesive film structure for bonding PVC and steel plate adopts following technical scheme:

the utility model provides a compound glued membrane structure for PVC and steel sheet bond, includes the transition layer, is used for with the first glued membrane layer of PVC layer bonding and is used for with the second glued membrane layer of steel sheet bonding, first glued membrane layer and second glued membrane layer respectively the coating in the both sides of transition layer, the contact angle of first glued membrane layer is 90~100, the contact angle of second glued membrane layer is 75~ 85.

Through adopting above-mentioned technical scheme, the first glued membrane layer of transition layer one side is used for bonding with the PVC layer, and PVC belongs to hydrophobic material, consequently, in order to ensure the bonding strength between compound glued membrane structure and the PVC layer, need improve the compatibility between first glued membrane layer and the PVC layer, consequently, the contact angle of first glued membrane layer is not less than 90 in this application; it should be noted that the contact angle of the first adhesive film layer should not be too large, so as to ensure good adhesion between the first adhesive film layer and the transition layer. The second adhesive film layer is used for being adhered to the steel plate, the steel plate is made of hydrophilic materials, and the contact angle of the second adhesive film layer is set to be smaller than 85 DEG, so that good adhesion performance between the composite adhesive film structure and the steel plate can be ensured; also, the contact angle of the second film layer should not be too small to ensure good adhesion between the first film layer and the transition layer.

Optionally, the roughness of the side, coated with the first adhesive film layer, of the transition layer is smaller than the roughness of the side, coated with the second adhesive film layer, of the transition layer.

Through adopting above-mentioned technical scheme, the roughness of transition layer both sides is different, and is close to the roughness of PVC layer one side lower, because the transition layer is also polymer material generally, often has relatively better compatibility with first glued membrane layer, in order to ensure the bonding fastness between transition layer and the second glued membrane layer, can suitably improve the roughness of transition layer, forms the microcosmic interpenetrating structure of transition layer membrane structure and second glued membrane layer structure.

Optionally, the transition layer is coated with a roughness ra=0.1-0.3 μm on one side of the second adhesive film layer; the transition layer is coated with the first adhesive film layer, and the roughness Ra=0.02-0.1 mu m of one side of the first adhesive film layer.

By adopting the technical scheme, the roughness Ra=0.02-0.1 mu m of the side, coated with the first adhesive film layer, of the transition layer can ensure that the transition layer and the first adhesive film layer have good bonding fastness; and the roughness Ra=0.1-0.3 mu m of one side of the transition layer coated with the second adhesive film layer can better ensure the bonding fastness between the transition layer and the second adhesive film.

Optionally, the surface tension of the side, coated with the first adhesive film layer, of the transition layer is 35-40 dynes; and the surface tension of one side of the transition layer coated with the second adhesive film layer is 45-50 dynes.

By adopting the technical scheme, the surface tension of the side, coated with the first adhesive film layer, of the transition layer is 35-40 dynes, so that the transition layer and the first adhesive film layer can be ensured to have good bonding fastness; and the surface tension of one side of the transition layer coated with the second adhesive film layer is 45-50 dynes, so that the bonding fastness between the transition layer and the second adhesive film can be better ensured.

It should be understood that the roughness, surface tension, etc. mentioned above refer to that, in the production process, if only the transition layer is produced, but not the first adhesive film layer and the second adhesive film layer are extruded on two sides of the transition layer, a simple transition layer can be obtained, and further the structure of the transition layer is tested.

Optionally, the average thickness of the composite adhesive film structure is D, the average thicknesses of the first adhesive film layer, the transition layer and the second adhesive film layer are D1, D2 and D3 in sequence, and the ratio of D2 to D is 0.15-0.25.

By adopting the technical scheme, the thickness of the transition layer is not too large or too small, the transition layer mainly plays a role of bearing the first adhesive film layer and the second adhesive film layer, and if the thickness of the transition layer is insufficient, the transition layer also often does not have enough strength, and the obtained composite adhesive film structure naturally does not have enough strength; if the thickness of the transition layer is too large, the obtained composite adhesive film structure is often insufficient in toughness, and is difficult to be well attached to a steel plate and a PVC layer to form stable adhesion.

Optionally, the ratio of the standard deviation S of the average thickness to the average thickness D of the composite adhesive film is not greater than 0.15.

By adopting the technical scheme, if the ratio of the standard deviation S of the average thickness of the composite adhesive film to the average thickness D is too large, the thickness uniformity of the composite adhesive film is poor, and finally the adhered steel plate is often uneven and has poor quality.

Optionally, the ratio of the thickness d3 of the second adhesive film layer to the thickness d1 of the first adhesive film layer is 1.2-2: 1.

in summary, the present application includes at least one of the following beneficial technical effects:

through setting up the compound glued membrane structure that has glued membrane layer structure of different performances, can be with the stable bonding of PVC layer to the steel sheet, obtain high-quality PVC tectorial membrane steel sheet.

Drawings

Fig. 1 is a cross-sectional view of a composite adhesive film structure according to an embodiment of the present application.

Reference numerals illustrate: 1. a first adhesive film layer; 2. a transition layer; 3. and a second adhesive film layer.

Description of the embodiments

This application is described in further detail below in conjunction with fig. 1.

Examples

A compound glued membrane structure for PVC and steel sheet bonding is including first glued membrane layer 1, transition layer 2 and the second glued membrane layer 3 that bond in proper order and obtain. The three film materials are processed through a three-layer co-extrusion film blowing machine, the extrusion temperature of the extruder is set to 160-200 ℃, the three-layer co-extrusion film is prepared, and the composite adhesive film structure for bonding PVC and a steel plate shown in figure 1 is finally obtained through the process links of extrusion, film blowing, cooling, rolling, cutting and the like.

The contact angle of the first adhesive film layer 1 is 90-100 degrees, and the contact angle of the second adhesive film layer 3 is 75-85 degrees; the transition layer 2 is coated with the roughness Ra=0.1-0.3 μm on one side of the second adhesive film layer 3; the transition layer 2 is coated with the first adhesive film layer 1, and the roughness Ra=0.02-0.1 mu m; the surface tension of the side, coated with the first adhesive film layer 1, of the transition layer 2 is 35-40 dynes; the surface tension of the side, coated with the second adhesive film layer 3, of the transition layer 2 is 45-50 dynes; the average thickness of the composite adhesive film structure is D, the average thickness of the first adhesive film layer 1, the transition layer 2 and the second adhesive film layer 3 is D1, D2 and D3 in sequence, and the ratio of D2 to D is 0.15-0.25; the ratio of the standard deviation S of the average thickness of the composite adhesive film to the average thickness D is not more than 0.15; the ratio of the thickness d3 of the second adhesive film layer 3 to the thickness d1 of the first adhesive film layer 1 is 1.2-2: 1.

the present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims

1. A compound glued membrane structure for PVC and steel sheet bond, its characterized in that: the PVC plastic film comprises a transition layer (2), a first plastic film layer (1) used for being bonded with a PVC layer and a second plastic film layer (3) used for being bonded with a steel plate, wherein the first plastic film layer (1) and the second plastic film layer (3) are respectively coated on two sides of the transition layer (2), the contact angle of the first plastic film layer (1) is 90-100 degrees, and the contact angle of the second plastic film layer (3) is 75-85 degrees.

2. The composite film structure for bonding PVC and steel sheet according to claim 1, wherein: the roughness of the side, coated with the first adhesive film layer (1), of the transition layer (2) is smaller than the roughness of the side, coated with the second adhesive film layer (3), of the transition layer (2).

3. The composite film structure for bonding PVC and steel sheet according to claim 1, wherein: the transition layer (2) is coated with the roughness Ra=0.1-0.3 mu m on one side of the second adhesive film layer (3); the transition layer (2) is coated with the first adhesive film layer (1), and the roughness Ra=0.02-0.1 mu m on one side of the first adhesive film layer.

4. The composite film structure for bonding PVC and steel sheet according to claim 1, wherein: the surface tension of the side, coated with the first adhesive film layer (1), of the transition layer (2) is 35-40 dynes; the surface tension of one side of the transition layer (2) coated with the second adhesive film layer (3) is 45-50 dynes.

5. The composite adhesive film structure for bonding PVC and steel plates according to any one of claims 1 to 4, wherein the composite adhesive film structure is characterized in that: the average thickness of the composite adhesive film structure is D, the average thickness of the first adhesive film layer (1), the transition layer (2) and the second adhesive film layer (3) is D1, D2 and D3 in sequence, and the ratio of D2 to D is 0.15-0.25.

6. The composite film structure for bonding PVC and steel sheet according to claim 5, wherein: the ratio of the standard deviation S of the average thickness of the composite adhesive film to the average thickness D is not more than 0.15.

7. The composite film structure for bonding PVC and steel sheet according to claim 5, wherein: the ratio of the thickness d3 of the second adhesive film layer (3) to the thickness d1 of the first adhesive film layer (1) is 1.2-2: 1.