CN212174861U - Hot melt adhesive film for FFC - Google Patents
Hot melt adhesive film for FFC Download PDFInfo
- Publication number
- CN212174861U CN212174861U CN202020546084.XU CN202020546084U CN212174861U CN 212174861 U CN212174861 U CN 212174861U CN 202020546084 U CN202020546084 U CN 202020546084U CN 212174861 U CN212174861 U CN 212174861U
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- Prior art keywords
- layer
- hot melt
- melt adhesive
- insulating layer
- adhesive film
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- 239000004831 Hot glue Substances 0.000 title claims abstract description 66
- 239000010410 layer Substances 0.000 claims abstract description 118
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 abstract description 9
- 239000003292 glue Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 239000012790 adhesive layer Substances 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Images
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The utility model discloses a hot melt adhesive membrane for FFC relates to the hot melt adhesive membrane field, hot melt adhesive membrane stacks gradually and is equipped with from type layer, insulating layer, precoat, tie coat and hot melt adhesive layer, the lower surface of tie coat is the corrugated surface, the opening of corrugated surface is less than the sectional area of recess bottom, the hot melt adhesive layer coating cover in the lower surface of tie coat. The utility model provides the heat resistance of hot melt adhesive membrane and stable in structure have effectively reduced the glue film because be in high temperature operating condition for a long time and make the possibility of glue film delaminating, also reduced the phenomenon of glue film skinning.
Description
Technical Field
The utility model relates to a hot melt adhesive membrane technical field especially relates to a hot melt adhesive membrane for FFC.
Background
The FFC Flat Cable is also called a Fexibe Flat Cable, namely a flexible Flat Cable, is a novel data Cable which is formed by clamping tinned Flat copper wires between an upper layer of insulating material and a lower layer of insulating material and pressing, and has the advantages of softness, random bending and folding and the like. The existing FFC flat cable realizes the hot-melt bonding of an insulating material and a tinned flat copper wire through a hot-melt adhesive film, wherein the hot-melt adhesive film is a film with a certain thickness made of materials capable of melting and bonding adherends, and is arranged between the adherends to implement the hot-melt bonding. In the current hot melt adhesive film product, a multilayer structure composed of an insulating layer and a functional hot melt adhesive layer is usually adopted, and an extrusion casting treatment method or a coating production process is usually adopted for treatment between the insulating layer and the functional hot melt adhesive layer, so that the layers are tightly attached, but the problems of insufficient adhesive force and unstable structure still exist between the insulating layer and the functional hot melt adhesive layer, even the situation of delamination and separation is generated, the performance and the stability of the hot melt adhesive film are greatly reduced, but the performance of the adhesive layer can directly determine the quality of a flexible cable, the flexible cable is easy to bend and has large bending degree, the application environment is mostly in a high-temperature environment, after the existing hot melt adhesive film and the flexible flat cable are subjected to line pressing forming, the aging is easy to occur under the high-temperature environment, the existing hot melt adhesive film after the aging has too large shrinkage degree, and the conductor in the flexible flat cable is, the service life of the flexible cable is seriously affected.
Disclosure of Invention
The utility model aims at providing a hot melt adhesive membrane of tie coat of high adhesive force improves the adhesion effect of insulating layer and hot melt adhesive layer, prevents the glue film delaminating.
The invention provides the following technical scheme:
the utility model provides a hot melt adhesive membrane for FFC stacks gradually and is equipped with from type layer, insulating layer, precoat, tie coat and hot melt adhesive layer, the lower surface of tie coat is the corrugated surface, hot melt adhesive layer coating cover in the lower surface of tie coat.
Furthermore, a groove is formed in the lower surface of the bonding layer, the cross section area of a notch of the groove is smaller than that of the groove bottom, the hot melt adhesive layer covers the lower surface of the bonding layer and fills the groove, and the thickness of the hot melt adhesive layer is 18-36 micrometers.
Adopt above-mentioned structure, improved the adhesive force of hot melt adhesive layer and tie coat, because hot melt adhesive film is in high temperature operating condition for a long time, the concave convex structure heat of hot melt adhesive layer and tie coat expands and makes inseparabler of laminating between them, reduces the possibility of delaminating.
Meanwhile, the adhesive layer is made of polyurethane materials, the hot melt adhesive layer can be made of low-shrinkage hot melt adhesives, the types of the low-shrinkage hot melt adhesives are various, the hot melt adhesives are mainly prepared by modifying with anti-shrinkage rate, the main components of the hot melt adhesives comprise epoxy modified saturated polyester types, flame retardants, synergistic flame retardants, curing agents, titanium dioxide and the like, and the hot melt adhesive layer can resist shrinkage and the adhesive layer expands due to heat, so that the bonding connection of the hot melt adhesive layer and the adhesive layer is tighter due to high temperature.
Further, the lengths of the insulating layer, the pre-coating layer, the bonding layer and the hot melt adhesive layer are the same, the length of the release layer is larger than that of the insulating layer, and the thickness of the release layer is 3-5 microns. By adopting the structure, the stripping of the release layer can be more convenient.
Furthermore, the insulating layer is made of PET, the thickness of the insulating layer is 20-30 μm, semicircular bulges are uniformly distributed on the lower surface of the insulating layer, and the thickness of the bulges is smaller than that of the precoating layer. By adopting the structure, the attaching tightness of the insulating layer and the precoat layer can be increased.
Further, precoat printing covers in the lower surface of insulating layer, precoat thickness is 2-3 mu m, and through printing precoat on the insulating layer, precoat can effectively provide the middle joint face, for providing the tie point between insulating layer and the tie coat, its compatibility to insulating layer and tie coat is good, makes its two-layer can both closely adhere to with insulating layer and tie coat, can not break away from, improves adnexed stability.
Furthermore, the bonding layer is coated on the lower surface of the pre-coating layer, the thickness of the bonding layer is 8-16 microns, and the thickness range among the insulating layer, the pre-coating layer and the bonding layer is controlled, so that the structure of the whole hot melt adhesive film is more stable, and the adhesive force of the hot melt adhesive film in a high-temperature state is more stable.
The utility model has the advantages that: the stability of the hot melt adhesive film is improved, the adhesive force between adhesive layers is effectively improved, and the problem that the hot melt adhesive film is easy to delaminate and crust in a long-term high-temperature environment is solved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of a hot melt adhesive film for FFC of the present invention.
Reference numerals: 1. a release layer; 2. an insulating layer; 201. a protrusion; 3. pre-coating; 4. a bonding layer; 401. a groove; 5. a hot melt adhesive layer.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in figure 1, a hot melt adhesive membrane for FFC, in proper order by leaving type layer 1, the insulating layer 2, precoat layer 3, tie coat 4 and hot melt adhesive layer 5 are constituteed, wherein the insulating layer 2, precoat layer 3, tie coat 4 and hot melt adhesive layer 5's length is the same, and the length from type layer 1 is than the insulating layer 2, precoat layer 3, tie coat 4 and hot melt adhesive layer 5's length is long, insulating layer 2 adopts the PET material to make, the insulating layer 2 upper surface is from type layer 1, the lower surface of insulating layer 2 is precoat layer 3, the lower surface of insulating layer 2 evenly is laid semicircular arch 201, the highly be less than precoat layer 3's thickness of arch 201, precoat layer 3 covers insulating layer 2 through the mode of printing, arch 201 has increased the adhesive force between insulating layer 2 and precoat layer 3, precoat layer 3's thickness is 2. This precoat 3 is for promoting the surface treatment agent of adhesive force, effectively strengthens adhesive force between insulating layer 2 and the tie coat 4 to utilize the printing to come quick cover certain thickness precoat 3, its coating effect is more stable even, and interlaminar structure is more stable. The lower surface of the precoating layer 3 is coated with the bonding layer 4, the thickness of the bonding layer 4 is 8-16 μm, the bonding layer 4 is arranged between the hot melt adhesive layer 5 and the precoating layer 2 to improve the adhesive force between the layers, the lower surface of the bonding layer 4 is provided with the groove 401, the opening of the groove 401 is downward, the opening cross-sectional area of the groove 401 is smaller than the cross-sectional area of the groove bottom, the hot melt adhesive layer 5 is coated on the lower surface of the bonding layer 4 and is filled into the groove 401, the hot melt adhesive film is kept in a high-temperature state during working, by utilizing the concave-convex embedded structure, the hot melt adhesive layer 5 is more closely connected with the bonding layer 4 when in thermal expansion, the delamination phenomenon of each layer in the hot melt adhesive film due to high temperature is prevented, the hot melt adhesive layer 5 can adopt low-, and because the low-shrinkage hot melt adhesive is adopted, the shrinkage rate of the insulating layer 2 can be reduced from the bottom surface, and meanwhile, the shrinkage rate of the hot melt adhesive film is also reduced, so that the possibility of skinning is reduced.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A hot melt adhesive film for FFC is characterized in that: the range upon range of in proper order is equipped with from type layer, insulating layer, precoating, tie coat and hot melt adhesive layer, the lower surface of tie coat is the corrugated surface, the hot melt adhesive layer coating cover in the lower surface of tie coat.
2. A hot melt adhesive film for FFC obtained by the process according to claim 1, wherein: the lower surface of the bonding layer is provided with a groove, the cross section area of the notch of the groove is smaller than that of the groove bottom, the hot melt adhesive layer covers the lower surface of the bonding layer and fills the groove, and the thickness of the hot melt adhesive layer is 18-36 microns.
3. A hot melt adhesive film for FFC obtained by the process according to claim 1, wherein: the insulating layer, the precoating layer, the bonding layer and the hot melt adhesive layer are the same in length, the length of the release layer is larger than that of the insulating layer, and the thickness of the release layer is 3-5 microns.
4. A hot melt adhesive film for FFC obtained by the process according to claim 1, wherein: the insulating layer is made of PET, the thickness of the insulating layer is 20-30 mu m, semicircular bulges are uniformly distributed on the lower surface of the insulating layer, and the thickness of the bulges is smaller than that of the precoating layer.
5. A hot melt adhesive film for FFC obtained by the process according to claim 1, wherein: the precoating layer is printed and covered on the lower surface of the insulating layer, and the thickness of the precoating layer is 2-3 mu m.
6. A hot melt adhesive film for FFC obtained by the process according to claim 1, wherein: the bonding layer is coated and covered on the lower surface of the pre-coating layer, and the thickness of the bonding layer is 8-16 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020546084.XU CN212174861U (en) | 2020-04-14 | 2020-04-14 | Hot melt adhesive film for FFC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020546084.XU CN212174861U (en) | 2020-04-14 | 2020-04-14 | Hot melt adhesive film for FFC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212174861U true CN212174861U (en) | 2020-12-18 |
Family
ID=73769398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020546084.XU Expired - Fee Related CN212174861U (en) | 2020-04-14 | 2020-04-14 | Hot melt adhesive film for FFC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212174861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311918A (en) * | 2021-12-21 | 2022-04-12 | 珠海全球时代科技有限公司 | Degradable environment-friendly card and preparation method thereof |
-
2020
- 2020-04-14 CN CN202020546084.XU patent/CN212174861U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311918A (en) * | 2021-12-21 | 2022-04-12 | 珠海全球时代科技有限公司 | Degradable environment-friendly card and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201218 |