CN112300727A - Self-adhesive composite conductive adhesive tape and preparation method thereof - Google Patents
Self-adhesive composite conductive adhesive tape and preparation method thereof Download PDFInfo
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- CN112300727A CN112300727A CN201910667762.XA CN201910667762A CN112300727A CN 112300727 A CN112300727 A CN 112300727A CN 201910667762 A CN201910667762 A CN 201910667762A CN 112300727 A CN112300727 A CN 112300727A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J107/00—Adhesives based on natural rubber
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/16—Metal
- C09J2400/163—Metal in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2407/00—Presence of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2453/00—Presence of block copolymer
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Abstract
The invention discloses a self-adhesive composite conductive adhesive tape, which is sequentially laminated with a release protective layer; the adhesive layer is formed by mixing an elastomer and a tackifier into a pressure-sensitive adhesive, and the pressure-sensitive adhesive contains a plurality of conductive particles; and a conductive substrate layer; wherein the elastomer is synthetic rubber, and the tackifier is terpene resin; or the elastomer is natural rubber, and the tackifier is modified rosin. Therefore, the problem that the acrylic self-adhesive conductive adhesive tape cannot meet the requirements of simultaneously bonding high-surface-energy and low-surface-energy materials is solved, and the effect of meeting the requirements of simultaneously bonding the high-surface-energy and low-surface-energy materials is achieved.
Description
Technical Field
The invention relates to a self-adhesive composite conductive adhesive tape and a preparation method thereof, in particular to a self-adhesive composite conductive adhesive tape which has good adhesive strength to a high-surface-energy material and effectively improves the adhesive strength to a low-surface-energy material and a preparation method thereof.
Background
With the development of the consumer electronics industry, consumer electronics products increasingly show the design characteristics of thinness, light weight and diversification, and with the arrival of the 5G communication era, the number of antennas in consumer electronics equipment is greatly increased, but the design lightness and thinness are the mainstream trend of the market; in a narrow space, how to solve the problem of electromagnetic radiation interference and electrostatic breakdown caused by the increase of antennas is very important for consumer electronics design; conventional consumer electronics conducting countermeasures are usually soldering, metal spring compression contact or cable fixing, but because these solutions require a large amount of space to be occupied, especially for the height part; therefore, more and more consumer electronics manufacturers are beginning to choose self-adhesive conductive tapes to replace traditional conductive materials such as solder, metal spring or cable.
In addition, acrylic acid is often selected as a base material of a pressure sensitive adhesive of a self-adhesive conductive tape because of its good heat resistance and oxidation resistance; in order to ensure the bonding strength, a certain space is needed for the use of the self-adhesive conductive adhesive tape, but with the thinning and lightening of the consumer electronics design, the space inside the electronic equipment is smaller and smaller, the self-adhesive conductive adhesive tape cannot be completely adhered to a metal surface with high surface energy, and special-shaped attaching modes such as cross-attaching and folding attaching appear; furthermore, in order to avoid electromagnetic interference, 5G high frequency communication requires that metal conductive materials are avoided as structural members in unnecessary occasions, so that a large amount of plastics, ceramics and glass are used in consumer electronics, wherein materials of low surface energy type are not lacked; however, the requirement of crossing or folding the self-adhesive conductive tape with high surface energy metal and low surface energy material is faced because the surface tension of polyacrylic acid itself is 36.9 x 103/(N/m) is of a relatively high surface tension type, making acrylic-based self-adhesive conductive tapes unsatisfactory for bonding high and low surface energy materials simultaneously.
Disclosure of Invention
The invention mainly aims to solve the problem that an acrylic self-adhesive conductive adhesive tape cannot meet the requirements for simultaneously adhering high-surface-energy and low-surface-energy materials, and provides a self-adhesive composite conductive adhesive tape capable of meeting the requirements for simultaneously adhering high-surface-energy and low-surface-energy materials and a preparation method thereof.
In order to achieve the above effects, the invention adopts the following technical means:
the self-adhesive composite conductive adhesive tape is characterized in that a release protective layer is sequentially laminated; the adhesive layer is obtained by mixing an elastomer and a tackifier into a pressure-sensitive adhesive, and mixing a plurality of conductive particles into the pressure-sensitive adhesive; and a conductive substrate layer.
Among them, preferably, the elastomer is a synthetic rubber, and the tackifier is a terpene resin.
Among them, the synthetic rubber elastomer is preferably a styrene-based thermoplastic elastomer.
Among them, preferably, the elastomer is natural rubber, and the tackifier is modified rosin.
Wherein, preferably, the weight portions of each component are as follows: 22-30 parts of release protective layer, 15-30 parts of pressure-sensitive adhesive, 3-10 parts of conductive particles and 37.5-65 parts of conductive base material.
Preferably, the thickness of the release protective layer is 25-150 micrometers, the thickness of the adhesive glue layer is 10-70 micrometers, and the thickness of the conductive substrate layer is 10-200 micrometers.
Wherein, preferably, the release force of the release protection layer is 5-30gf/inch, and the conductive substrate layer is pure metal foil or porous fiber material with metal coating.
Further, the invention also provides a preparation method of the self-adhesive composite conductive adhesive tape, which comprises the following steps:
step one, taking an elastomer as a main body, adding a tackifier and a solvent, and stirring at 2000 rpm for 30 minutes to form a mixture, wherein the weight parts are as follows: 30-40 parts of elastomer, 10-15 parts of tackifier and 44-54 parts of solvent;
step two, the mixture which is finished in the step one is placed for 24 hours at the temperature of 50 ℃ and then taken out;
step three, mixing 3-10 parts by weight of a plurality of conductive particles with the mixture obtained in the step two, and stirring for 30 minutes at the speed of 1000 rpm;
step four, coating the mixture obtained in the step three on a PET release protective film with the thickness of 25-150 microns at the thickness of 10-70 microns, and feeding the PET release protective film into an oven at the speed of 8 m/min to expel the solvent; and
and fifthly, after the adhesive tape is taken out of the oven, attaching a conductive base material with the thickness of 10-200 microns to obtain the self-adhesive composite conductive adhesive tape.
Preferably, the elastomer is synthetic rubber or natural rubber, the tackifier is terpene resin or modified rosin, and the solvent is ethyl acetate.
Among them, the synthetic rubber is preferably a styrene thermoplastic elastomer.
Therefore, the pressure-sensitive adhesive formed by mixing the styrene thermoplastic elastomer (or natural rubber) with the terpene resin (or modified rosin) has lower surface tension, not only has good bonding strength to high-surface-energy materials, but also effectively improves the bonding strength to low-surface-energy materials.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Description of the symbols:
10-release protective layer
20 adhesive layer
21 pressure-sensitive adhesive
22 conductive particles
30 conductive substrate layer
Detailed Description
First, referring to fig. 1, a release protection layer 10 is sequentially laminated on the self-adhesive composite conductive tape according to a first embodiment of the present invention, wherein the thickness is 25-150 μm and the release force is 5-30 gf/inch; an adhesive layer 20 with a thickness of 10-70 μm, wherein the adhesive layer 20 is obtained by mixing styrene thermoplastic elastomer (SBS polymer) and terpene resin into a pressure sensitive adhesive 21, and mixing a plurality of conductive particles 22 in the pressure sensitive adhesive; and a conductive substrate layer 30, which can be a pure metal foil or a porous fiber material with a metal coating, and has a thickness of 10-200 microns; wherein the weight parts of the components are as follows: 22-30 parts of release protective layer, 15-30 parts of pressure-sensitive adhesive, 3-10 parts of conductive particles and 37.5-65 parts of conductive base material.
Furthermore, the difference between the second embodiment and the first embodiment of the self-adhesive composite conductive tape of the present invention is: the adhesive layer is prepared by mixing natural rubber and modified rosin into pressure-sensitive adhesive.
Next, the preparation method of the self-adhesive composite conductive adhesive tape of the invention comprises the following steps: firstly, taking a styrene thermoplastic elastomer (or natural rubber) as a main body, adding terpene resin (or modified rosin) and a solvent (such as ethyl acetate), and stirring at a speed of 2000 revolutions per minute for 30 minutes to form a mixture, wherein the weight parts are as follows: 30-40 parts of styrene thermoplastic elastomer (or natural rubber), 10-15 parts of terpene resin (or modified rosin) and 44-54 parts of ethyl acetate; step two, the mixture which is finished in the step one is placed for 24 hours at the temperature of 50 ℃ and then taken out; step three, mixing 3-10 parts by weight of a plurality of conductive particles with the mixture obtained in the step two, and stirring for 30 minutes at the speed of 1000 rpm; step four, coating the mixture obtained in the step three on a PET release protective film with the thickness of 75 microns at the thickness of 20 microns, and feeding the PET release protective film into an oven at the speed of 8 m/min to expel the solvent; and step five, after the adhesive tape is taken out of the oven, attaching a conductive base material with the thickness of 23 microns to obtain the self-adhesive composite conductive adhesive tape.
The 180-degree peel strength test method of the pressure-sensitive adhesive tape GB2792-81 of the people's republic of China is referred to, and the 180-degree peel strength of the conductive adhesive tape prepared by the invention and the conductive adhesive tape sold in the common market to a 304 stainless steel plate with high surface energy and a polyethylene PE plastic plate with low surface energy are respectively tested. The results are shown in table 1:
TABLE 1
Based on the above constitution, the pressure-sensitive adhesive of the present invention has a lower surface tension (up to 24.8X 10) which is obtained by blending a terpene resin (or modified rosin) with a styrenic thermoplastic elastomer (or natural rubber)3And (N/m)), and the above-mentioned test results show that the self-adhesive composite conductive adhesive tape of the invention not only has good adhesive strength to the high surface energy metal 304 stainless steel, but also effectively improves the adhesive strength to the low surface energy polyethylene PE plastic, and has the efficacy of satisfying the requirements of simultaneously adhering high surface energy and low surface energy materials.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A self-adhesive composite conductive adhesive tape is characterized in that a release protective layer is sequentially laminated; the adhesive layer is obtained by mixing an elastomer and a tackifier into a pressure-sensitive adhesive, and mixing a plurality of conductive particles into the pressure-sensitive adhesive; and a conductive substrate layer.
2. The self-adhesive composite electrically conductive tape according to claim 1, wherein the elastomer is a synthetic rubber and the tackifier is a terpene resin.
3. The self-adhesive composite conductive tape according to claim 2, wherein the synthetic rubber elastomer is a styrenic thermoplastic elastomer.
4. The self-adhesive composite conductive tape according to claim 1, wherein the elastomer is natural rubber and the tackifier is modified rosin.
5. The self-adhesive composite conductive adhesive tape according to claim 2, 3 or 4, wherein the weight parts of the components are as follows: 22-30 parts of release protective layer, 15-30 parts of pressure-sensitive adhesive, 3-10 parts of conductive particles and 37.5-65 parts of conductive base material.
6. The self-adhesive composite conductive tape according to claim 5, wherein the thickness of the release protective layer is 25 to 150 μm, the thickness of the adhesive layer is 10 to 70 μm, and the thickness of the conductive base layer is 10 to 200 μm.
7. The self-adhesive composite conductive tape according to claim 6, wherein the release force of the release protective layer is 5 to 30gf/inch, and the conductive substrate layer is a pure metal foil or a porous fiber material having a metal plating layer.
8. The preparation method of the self-adhesive composite conductive adhesive tape is characterized by comprising the following steps:
step one, taking an elastomer as a main body, adding a tackifier and a solvent, and stirring at 2000 rpm for 30 minutes to form a mixture, wherein the weight parts are as follows: 30-40 parts of elastomer, 10-15 parts of tackifier and 44-54 parts of solvent;
step two, the mixture which is finished in the step one is placed for 24 hours at the temperature of 50 ℃ and then taken out;
step three, mixing 3-10 parts by weight of a plurality of conductive particles with the mixture obtained in the step two, and stirring for 30 minutes at the speed of 1000 rpm;
step four, coating the mixture obtained in the step three on a PET release protective film with the thickness of 25-150 microns at the thickness of 10-70 microns, and feeding the PET release protective film into an oven at the speed of 8 m/min to expel the solvent; and
and fifthly, after the adhesive tape is taken out of the oven, attaching a conductive base material with the thickness of 10-200 microns to obtain the self-adhesive composite conductive adhesive tape.
9. The method for preparing a self-adhesive composite conductive tape according to claim 8, wherein the elastomer is synthetic rubber or natural rubber, the tackifier is terpene resin or modified rosin, and the solvent is ethyl acetate.
10. The method for preparing a self-adhesive composite conductive tape according to claim 9, wherein the synthetic rubber is a styrenic thermoplastic elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910667762.XA CN112300727A (en) | 2019-07-23 | 2019-07-23 | Self-adhesive composite conductive adhesive tape and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910667762.XA CN112300727A (en) | 2019-07-23 | 2019-07-23 | Self-adhesive composite conductive adhesive tape and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112300727A true CN112300727A (en) | 2021-02-02 |
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| CN201910667762.XA Pending CN112300727A (en) | 2019-07-23 | 2019-07-23 | Self-adhesive composite conductive adhesive tape and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857762A (en) * | 2011-08-10 | 2014-06-11 | 德莎欧洲公司 | Electrically conductive adhesive compound and adhesive tape |
| TW201811958A (en) * | 2016-09-06 | 2018-04-01 | 東莞爵士先進電子應用材料有限公司 | Conductive adhesive tape and manufacturing method thereof capable of achieving the effect of stably increasing the conductivity |
| CN108300344A (en) * | 2016-09-19 | 2018-07-20 | 东莞爵士先进电子应用材料有限公司 | Conductive tape and preparation method thereof |
| CN109233652A (en) * | 2017-05-26 | 2019-01-18 | 宁德新能源科技有限公司 | Conductive tape uses the pole piece of the conductive tape, battery core and secondary cell |
-
2019
- 2019-07-23 CN CN201910667762.XA patent/CN112300727A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857762A (en) * | 2011-08-10 | 2014-06-11 | 德莎欧洲公司 | Electrically conductive adhesive compound and adhesive tape |
| TW201811958A (en) * | 2016-09-06 | 2018-04-01 | 東莞爵士先進電子應用材料有限公司 | Conductive adhesive tape and manufacturing method thereof capable of achieving the effect of stably increasing the conductivity |
| CN108300344A (en) * | 2016-09-19 | 2018-07-20 | 东莞爵士先进电子应用材料有限公司 | Conductive tape and preparation method thereof |
| CN109233652A (en) * | 2017-05-26 | 2019-01-18 | 宁德新能源科技有限公司 | Conductive tape uses the pole piece of the conductive tape, battery core and secondary cell |
Non-Patent Citations (1)
| Title |
|---|
| 祖群，赵谦编著: "《高性能玻璃纤维》", 30 September 2017 * |
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