CN220242714U - Composite film - Google Patents
Composite film Download PDFInfo
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- CN220242714U CN220242714U CN202321686964.7U CN202321686964U CN220242714U CN 220242714 U CN220242714 U CN 220242714U CN 202321686964 U CN202321686964 U CN 202321686964U CN 220242714 U CN220242714 U CN 220242714U
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- layer
- composite film
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- thickness
- film
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- 239000002131 composite material Substances 0.000 title claims abstract description 52
- 239000010410 layer Substances 0.000 claims abstract description 119
- 239000012790 adhesive layer Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000002861 polymer material Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 20
- 238000007639 printing Methods 0.000 abstract description 12
- 238000007650 screen-printing Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model relates to the technical field of composite films, in particular to a composite film. The composite film comprises a bottom layer, a lower film layer, an adhesive layer, an upper film layer and a release layer which are sequentially laminated from bottom to top. The composite film provided by the utility model has the functions of positioning and fixing, negative pressure transmission, micro-adhesion/convenient pickup, repeated utilization, release and the like, and can effectively solve the problem of sticking plates in the screen printing process when the composite film is placed between a printing platen and a base material.
Description
Technical Field
The utility model relates to the technical field of composite films, in particular to a composite film.
Background
The screen printing is to pour ink into one end of a screen printing plate, apply a certain pressure to the ink part on the screen printing plate by a scraper, and simultaneously move at a constant speed towards the other end of the screen printing plate, wherein the ink is extruded onto a printing object from a mesh of an image-text part by the scraper in the moving process. At present, a person skilled in the art generally adopts a screen printing mode to prepare a circuit board, namely: and forming a circuit pattern on the surface of the substrate by utilizing the conductive paste in a screen printing mode, so as to obtain the conductive circuit board. However, in the process of preparing the circuit board by screen printing, the conductive paste may have an upward tension on the substrate, and especially when the viscosity of the conductive paste is high, the substrate is easily adhered to the screen plate and is further separated from the printing platen (i.e., the problem of sticking the plate), which may greatly reduce the production efficiency.
To solve the sticking problem, the skilled person will usually use an adhesive tape to fix the substrate to the printing platen, however, this approach will greatly reduce the production efficiency and easily lead to uneven printing thickness; those skilled in the art will also employ ways to increase the vacuum of the printing platen, namely: this approach, while effective for rigid substrates, gives the substrate a significant downward pressure by increasing the platen vacuum, is less effective for flexible substrates (the flexible substrate partially traps into the platen air holes, causing deformation of the substrate, ultimately resulting in deviations in the printed pattern).
In view of this, the present utility model has been made.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a composite film which is placed between a printing platen and a base material, so that the problem of sticking plates in the screen printing process can be effectively solved.
Specifically, the utility model provides the following technical scheme:
the utility model provides a composite film which comprises a bottom layer, a lower film layer, an adhesive layer, an upper film layer and a release layer which are sequentially laminated from bottom to top.
As a preferable mode of the technical scheme, the thickness of the release layer is 2-5 mu m, and the peeling strength is 0.1-1N/cm.
As a preferable mode of the technical scheme, the thickness of the upper film layer is 20-100 mu m.
As a preferable mode of the above technical scheme, the thickness of the adhesive layer is 5-20 μm, and the peeling strength is >15N/cm.
Preferably, in the above technical solution, the thickness of the lower film layer is >100 μm.
As a preferable mode of the above technical scheme, the thickness of the bottom layer is 10-50 μm, and the peel strength is 0.1-5N/cm.
Preferably, the composite film has a central region and an edge region surrounding the central region.
As a preferable mode of the technical scheme, the central area is provided with a plurality of round holes with diameters smaller than 50 mu m; the density of the round holes is not less than 100/cm 2 。
In the utility model, the center area of the composite film is provided with a plurality of round holes, so that negative pressure on the printing platen can be transmitted to the upper layer of the composite film, and downward air pressure is generated after the base material is paved, thereby being more beneficial to increasing the adhesion between the printing platen and the base material.
As a preferable mode of the above technical solution, the bottom layer located in the central area is a central bottom layer, and the material of the central bottom layer is a mixture of a release agent and an adhesive;
as an optimization of the above technical scheme, the bottom layer located in the edge area is an edge bottom layer, and the material of the edge bottom layer is a parting agent;
in the utility model, the material of the bottom layer is arranged in the mode, so that the picking up of the composite film in the actual use process is convenient.
Preferably, in the above technical solution, the release layer is made of a release agent.
As a preferable aspect of the above-mentioned technical solution, the upper film layer is made of a polymer material with a hardness of 20A <40D, for example: TPU, EVA, silicone, and the like.
As a preferable aspect of the foregoing disclosure, the material of the adhesive layer is an adhesive with a hardness of >20A, for example: epoxy, acrylic, and the like.
As a preferable aspect of the foregoing disclosure, the lower film layer is made of a steel foil, a composite material or a polymer material with a hardness of >70D, for example: PET, PI, etc.
The utility model has the beneficial effects that:
the composite film provided by the utility model has the functions of positioning and fixing, negative pressure transmission, micro-adhesion/convenient pickup, repeated utilization, release and the like, and can effectively solve the problem of sticking plates in the screen printing process when the composite film is placed between a printing platen and a base material.
Drawings
FIG. 1 is a schematic longitudinal section of a composite membrane provided by the utility model;
FIG. 2 is a schematic top view of a composite membrane provided by the present utility model;
in the figure: 1. a release layer; 2. coating a film layer; 3. an adhesive layer; 4. a lower film layer; 5. a bottom layer; 51. a central bottom layer; 52. an edge base layer; the area A is a central area; the B region is an edge region.
Detailed Description
The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. The reagents or equipment used were conventional products available for purchase by regular vendors without the manufacturer's attention.
Example 1
The embodiment provides a composite film, as shown in fig. 1 and 2, the composite film comprises a bottom layer 5, a lower film layer 4, an adhesive layer 3, an upper film layer 2 and a release layer 1 which are sequentially laminated from bottom to top;
the thickness of the release layer 1 is 5 mu m, and the peeling strength is 1N/cm;
the thickness of the upper film layer 2 is 100 mu m;
the thickness of the adhesive layer 3 is 20 mu m, and the peeling strength is 16N/cm;
the thickness of the lower film layer 4 is 200 mu m;
the thickness of the bottom layer 5 is 30 μm;
the composite film is provided with a central area A and an edge area B which is arranged around the periphery of the central area A;
the central area A is provided with a plurality of round holes with the diameter of 30 mu m; the density of the round holes is 200/cm 2 ；
The bottom layer 5 positioned in the area of the central area A is a central bottom layer 51, and the material of the central bottom layer 51 is a mixture of a release agent, an adhesive and the like in mass ratio; the peel strength of the center chassis layer 51 was 3N/cm;
the bottom layer 5 positioned in the area B of the edge area is an edge bottom layer 52, and the material of the edge bottom layer 52 is a parting agent; the peel strength of the edge base layer 52 was 1N/cm;
the release layer 1 is made of a release agent;
the upper film layer is made of a polymer material with the hardness of 20A < 40D;
the adhesive layer 3 is made of adhesive with the hardness of more than 20A;
the lower film layer 4 is made of steel foil, composite material or polymer material with the hardness of more than 70D.
Example 2
The embodiment provides a composite film, as shown in fig. 1 and 2, the composite film comprises a bottom layer 5, a lower film layer 4, an adhesive layer 3, an upper film layer 2 and a release layer 1 which are sequentially laminated from bottom to top;
the thickness of the release layer 1 is 2 mu m, and the peeling strength is 0.1N/cm;
the thickness of the upper film layer 2 is 20 mu m;
the thickness of the adhesive layer 3 is 5 mu m, and the peeling strength is 16N/cm;
the thickness of the lower film layer 4 is 120 mu m;
the thickness of the bottom layer 5 is 10 μm;
the composite film is provided with a central area A and an edge area B which is arranged around the periphery of the central area A;
the central area A is provided with a plurality of round holes with the diameter of 30 mu m; the density of the round holes is 200/cm 2 ；
The bottom layer 5 positioned in the area of the central area A is a central bottom layer 51, and the material of the central bottom layer 51 is a mixture of a release agent, an adhesive and the like in mass ratio; the peel strength of the center chassis layer 51 was 3N/cm;
the bottom layer 5 positioned in the area B of the edge area is an edge bottom layer 52, and the material of the edge bottom layer 52 is a parting agent; the peel strength of the edge base layer 52 was 0.1N/cm;
the release layer 1 is made of a release agent;
the upper film layer is made of a polymer material with the hardness of 20A < 40D;
the adhesive layer 3 is made of adhesive with the hardness of more than 20A;
the lower film layer 4 is made of steel foil, composite material or polymer material with the hardness of more than 70D.
Example 3
The embodiment provides a composite film, as shown in fig. 1 and 2, the composite film comprises a bottom layer 5, a lower film layer 4, an adhesive layer 3, an upper film layer 2 and a release layer 1 which are sequentially laminated from bottom to top;
the thickness of the release layer 1 is 5 mu m, and the peeling strength is 1N/cm;
the thickness of the upper film layer 2 is 100 mu m;
the thickness of the adhesive layer 3 is 20 mu m, and the peeling strength is 16N/cm;
the thickness of the lower film layer 4 is 120 mu m;
the thickness of the bottom layer 5 is 50 μm;
the composite film is provided with a central area A and an edge area B which is arranged around the periphery of the central area A;
the central area A is provided with a plurality of round holes with the diameter of 30 mu m; the density of the round holes is 200/cm 2 ；
The bottom layer 5 positioned in the area of the central area A is a central bottom layer 51, and the material of the central bottom layer 51 is a mixture of a release agent, an adhesive and the like in mass ratio; the peel strength of the center chassis layer 51 was 3N/cm;
the bottom layer 5 positioned in the area B of the edge area is an edge bottom layer 52, and the material of the edge bottom layer 52 is a parting agent; the peel strength of the edge base layer 52 was 1N/cm;
the release layer 1 is made of a release agent;
the upper film layer is made of a polymer material with the hardness of 20A < 40D;
the adhesive layer 3 is made of adhesive with the hardness of more than 20A;
the lower film layer 4 is made of steel foil, composite material or polymer material with the hardness of more than 70D.
Example 4
The embodiment provides a composite film, as shown in fig. 1 and 2, the composite film comprises a bottom layer 5, a lower film layer 4, an adhesive layer 3, an upper film layer 2 and a release layer 1 which are sequentially laminated from bottom to top;
the thickness of the release layer 1 is 4 mu m, and the peeling strength is 0.5N/cm;
the thickness of the upper film layer 2 is 50 mu m;
the thickness of the adhesive layer 3 is 15 mu m, and the peeling strength is 16N/cm;
the thickness of the lower film layer 4 is 120 mu m;
the thickness of the bottom layer 5 is 40 μm;
the composite film is provided with a central area A and an edge area B which is arranged around the periphery of the central area A;
the central area A is provided with a plurality of round holes with the diameter of 30 mu m; the density of the round holes is 200/cm 2 ；
The bottom layer 5 positioned in the area of the central area A is a central bottom layer 51, and the material of the central bottom layer 51 is a mixture of a release agent, an adhesive and the like in mass ratio; the peel strength of the center chassis layer 51 was 4N/cm;
the bottom layer 5 positioned in the area B of the edge area is an edge bottom layer 52, and the material of the edge bottom layer 52 is a parting agent; the peel strength of the edge base layer 52 was 0.5N/cm;
the release layer 1 is made of a release agent;
the upper film layer is made of a polymer material with the hardness of 20A < 40D;
the adhesive layer 3 is made of adhesive with the hardness of more than 20A;
the lower film layer 4 is made of steel foil, composite material or polymer material with the hardness of more than 70D.
Test example 1
In the test example, the composite film of the embodiment is placed on the surface of a printing platen, then a base material is placed on the surface of the composite film, and after the first screen printing, the peeling strength between the composite film and the printing platen and the peeling strength between the base material and the composite film are tested; then, the composite films are repeatedly used for 50 times and then the test is carried out again; the test standard is IPC-TM650 2.4.9 printed circuit flexible material peel strength; the results are shown in Table 1;
table 1 results of peel strength test for each composite film
While the utility model has been described in detail in the foregoing general description, embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (9)
1. The composite film is characterized by comprising a bottom layer, a lower film layer, an adhesive layer, an upper film layer and a release layer which are sequentially laminated from bottom to top;
the thickness of the release layer is 2-5 mu m, and the peeling strength is 0.1-1N/cm.
2. The composite film of claim 1, wherein the upper film layer has a thickness of 20-100 μm.
3. The composite film of claim 1, wherein the adhesive layer has a thickness of 5-20 μm and a peel strength of >15N/cm.
4. The composite film of claim 1, wherein the lower film layer has a thickness >100 μιη.
5. The composite film of claim 1, wherein the base layer has a thickness of 10-50 μm and a peel strength of 0.1-5N/cm.
6. The composite membrane of claim 1 having a central region and an edge region surrounding the central region.
7. The composite membrane of claim 6, wherein the central region is provided with a plurality of circular holes having a diameter of less than 50 μm; the density of the round holes is not less than 100/cm 2 。
8. The composite membrane of claim 7 wherein the bottom layer in the edge region is an edge bottom layer and the edge bottom layer is a release agent.
9. The composite film according to claim 1, wherein the release layer is made of a release agent; and/or the number of the groups of groups,
the upper film layer is made of a polymer material with the hardness of 20A < 40D; and/or the number of the groups of groups,
the adhesive layer is made of adhesive with the hardness of more than 20A; and/or the number of the groups of groups,
the lower film layer is made of steel foil, composite material or polymer material with the hardness of more than 70D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321686964.7U CN220242714U (en) | 2023-06-30 | 2023-06-30 | Composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321686964.7U CN220242714U (en) | 2023-06-30 | 2023-06-30 | Composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220242714U true CN220242714U (en) | 2023-12-26 |
Family
ID=89272286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321686964.7U Active CN220242714U (en) | 2023-06-30 | 2023-06-30 | Composite film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220242714U (en) |
-
2023
- 2023-06-30 CN CN202321686964.7U patent/CN220242714U/en active Active
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