CN103805080A - Adhesive film and flat cable with the same - Google Patents
Adhesive film and flat cable with the same Download PDFInfo
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- CN103805080A CN103805080A CN201310464661.5A CN201310464661A CN103805080A CN 103805080 A CN103805080 A CN 103805080A CN 201310464661 A CN201310464661 A CN 201310464661A CN 103805080 A CN103805080 A CN 103805080A
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Abstract
The invention provides an adhesive film and a flat cable with the same. The adhesive film aims to cope with high-frequency signal transmission and ensures no invasion of foreign matter and water to inner part of the adhesive film in the adhesive film keeping after the flat cable is prepared. The adhesive films (10), (20), (30) respectively have a coating part (13) coated by a hot-melt adhesive (12) and a non-coating part (14) that is not coated by the hot-melt adhesive (12) on single surface of a resin film (11). The thickness of the coating part is between 10 mu m and 100 mu m. The coating part has an edge part (15) which has an area that equals with 30%-90% of the area of a single surface of the resin film (11) and at least exists in the resin film (11).
Description
Technical field
The present invention relates to be suitable for the adhesive film that high-frequency signal transmission uses and the flat cable that uses it.
Background technology
Flat cable is the cable that the multiple flat copper conductors that are arranged in parallel is covered to (lamination) with two adhesive film clampings, has the feature of flexibility excellence.This flat cable is as the flat cable (film wiring material) of the various electric/electronic devices such as image documentation equipment, stereo set, robot, diagnostic ultrasound equipment such as the OA such as printer, scanner equipment, computer equipment, liquid-crystal display, plasma display and be widely used.
In recent years, particularly, in the image documentation equipment of the representative such as liquid-crystal display, plasma display, be accompanied by the high-definition of image, carried out the high frequency of electrical signal, need the reply of high frequency transmission for flat cable.
Prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 7-331199 communique
Patent documentation 2: TOHKEMY 2008-50423 communique
Summary of the invention
Invent problem to be solved
Dielectric loss, conductor losses and the radiation losses sum for transmission loss of electrical signal represent, follow electrical signal high frequency dielectric loss, conductor losses and radiation losses to increase.Transmission loss makes signal attenuation, the reliability of infringement signal, therefore, carrying out, in the distribution of radio-frequency signal transmission, need to taking the measure of the increase that suppresses dielectric loss, conductor losses and radiation losses.
Especially, the frequency of the signal of square root, tangent of the dielectric loss angle and the use of the relative permittivity of the adhesive film of dielectric loss and covering conductor is long-pending proportional.Therefore, preferably use the adhesive film that relative permittivity and tangent of the dielectric loss angle are little.
In order to reduce dielectric loss, can consider to use the adhesive film that adhesive linkage is foamed.As the method for making adhesive linkage foaming, propose to use the method for the balloon of chemical foaming agent, hollow by thermal expansion.
, in the method, according to the difference of lamination and expansion ratio has deviation, the relative permittivity of adhesive film also there will be deviation (for example, with reference to patent documentation 1).
Therefore, the partly method of coating adhesive has been proposed on the resin molding of base material that becomes adhesive film.As the method for coating adhesive partly, can consider the method (for example, with reference to patent documentation 2) of striated or point-like ground coating adhesive.
But on resin molding striated or point-like ground coating adhesive in the situation that, making when adhesive film being rolled into web-like after flat cable and preserving, foreign matter, moisture are likely invaded the inside of adhesive film.
Therefore, the object of the invention is to, provide reply radio-frequency signal transmission and making after flat cable, when keeping adhesive film, foreign matter, moisture can not invade adhesive film inside adhesive film and use its flat cable.
For solving the method for problem
The present invention who creates in order to reach this object is a kind of adhesive film, it for having the adhesive film that is coated with the coating part of hot-melt adhesive and the non-coating part of uncoated aforementioned hot-melt adhesive on the one side of resin molding, aforementioned coating part thickness is below the above 100 μ m of 10 μ m, having with respect to the area of the one side of aforementioned resin film is more than 30% area below 90%, is at least present in the edge part of aforementioned resin film.
Aforementioned non-coating part can be point-like, striated or the Polygons existing regularly on the one side of aforementioned resin film.
In addition, the present invention clamps by aforementioned adhesive film the flat cable that covers conductor.
Invention effect
According to the present invention, can provide reply radio-frequency signal transmission and making after flat cable, when keeping adhesive film, foreign matter, moisture can not invade adhesive film inside adhesive film and use its flat cable.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view that represents the adhesive film in embodiments of the present invention.
Fig. 2 is the schematic top plan view that represents the adhesive film in variation of the present invention.
Fig. 3 is the schematic top plan view that represents the adhesive film in variation of the present invention.
Fig. 4 is the figure that represents the flat cable of the adhesive film that uses Fig. 2, is (a) that A-A line diagrammatic cross-section, (b) are B-B line diagrammatic cross-section.
Fig. 5 is the schematic cross section that represents the flat cable in variation of the present invention.
Nomenclature:
10,20,30: adhesive film; 11: resin molding; 12: hot-melt adhesive; 13: coating part; 14: non-coating part; 15: edge part.
Embodiment
Below with reference to the accompanying drawings the preferred embodiment of the present invention is described.
As shown in Figures 1 to 3, the adhesive film 10,20,30 in present embodiment is characterised in that on the one side of resin molding 11, to have and be coated with the coating part 13 of hot-melt adhesive 12 and the non-coating part 14 of uncoated hot-melt adhesive 12; Coating part 13 thickness are below the above 100 μ m of 10 μ m, and having with respect to the area of the one side of resin molding 11 is more than 30% area below 90%, is at least present in the edge part 15 of resin molding 11.Here, so-called edge part, is formed as frame shape in the periphery of resin molding 11.
As resin molding 11, can enumerate physical strength excellent and be rich in the film being formed by following substances of insulation characterisitic: polyethylene terephthalate (PET), PEN (PEN), polybutylene terephthalate, the polyester mesenterys such as PBN, nylon 8, nylon 66, the polymeric amide mesenterys such as NYLON610, polyimide (PI), polyamidoimide, polyetherimide, polyetherketone, polyether-ether-ketone, polythioether, polyarylester, polysulfones, fully aromatic polyamide, aromatic polyamide, polycarbonate, polypropylene.
In resin molding 11, can use not stretchable film or stretchable film, in order to improve intensity, preferably stretchable film, particularly preferably biaxial stretchable film.
On the surface of resin molding 11, in order to improve and the bonding force of hot-melt adhesive 12, can implement as required corona treatment, plasma treatment, ozonize, flame treating etc.
In addition, to improve with the bonding force of hot-melt adhesive 12 as object, can also form prime coat on the surface of resin molding 11 as required.As the resin that forms prime coat, can enumerate vibrin, urethane resin.These resins can improve bonding reliability by adding isocyanate compound or polycarbodiimide compound.The thickness of prime coat is generally the following left and right of the above 10 μ m of 0.04 μ m, is particularly preferably below the above 6 μ m of 0.1 μ m.
The thickness of resin molding 11 is preferably below the above 100 μ m of 5 μ m.If this is that physical strength deficiency, if exceed 100 μ m, lacks flexibility owing to being less than 5 μ m.
In addition preferably on the one side of resin molding 11, be formed with, the non-coating part 14 of the point-like (with reference to Fig. 1), striated (with reference to Fig. 2) or the Polygons (with reference to Fig. 3) that exist regularly.That is, although in adhesive film 10,20,30, on the one side of resin molding 11, be coated with hot-melt adhesive 12, not coating on whole of the one side of resin molding 11, but be provided with non-coating part 14 in a part.
For example, in adhesive film 10, non-coating part 14 exists with point-like, and in adhesive film 20, non-coating part 14 exists with striated, and coating part 13 exists with ladder shape simultaneously, square exist of non-coating part 14 to configure regularly in adhesive film 30, coating part 13 exists with reticulation simultaneously., non-coating part 14 is preferably the point-like, striated or the Polygons that on the one side of resin 11, exist regularly.
This non-coating part 14 becomes and is formed at the air isolation portion between conductor and resin molding 11 when flat cable making.Therefore, can the relative permittivity of adhesive film 10,20,30 be suppressed lowly, can make the transmission loss in the radio-frequency signal transmission of the flat cable of making of adhesive film 10,20,30 little.
In addition, with on one side at resin molding 11 all compared with the situations of coating hot-melt adhesives 12, can make the usage quantity of hot-melt adhesive 12 few, therefore, can reduce materials cost.
As hot-melt adhesive 12, can use and can carry out crimping and polyester based resin that at room temperature can be not bonding, polyurethane series resin, thermoplastic elastomer, various elastomeric material, acid-modified polyolefin resin, ethylene-alpha-olefin copolymer, acrylic resin etc. 100 ℃ of left and right.
In this hot-melt adhesive 12, can add the fire retardants such as bromine compounds, phosphorus compound, nitrogen compound, metallic compound.As bromine compounds, can use ethene two (ten bromobenzenes), ethene two (tetrabromo phthalimide), tetrabromo-bisphenol etc.As phosphorus compound, can use phosphate metal salt, phosphoric acid salt, polyphosphoric acid melamine, ammonium polyphosphate, phosphoric acid ester, condensed phosphoric acid esters, phosphazene compound etc.In addition,, as nitrogen compound, can use sulfuric acid trimeric cyanamide, guanidine compound, melamine compound, 1,3,5-triazines derivative etc.As metallic compound, can use magnesium hydroxide, aluminium hydroxide, zinc, zinc hydroxyl stannate, zinc borate, lime borate, zinc sulphide, ANTIMONY TRIOXIDE SB 203 99.8 PCT etc.These fire retardants can use separately, also can use two kinds of above compounds simultaneously.
In hot-melt adhesive 12, can also further add antioxidant, copper evil preventing agent, antiblocking agent, tinting material, thickening material, linking agent, crosslinking coagent, static inhibitor, ultraviolet preventing agent, photostabilizer, hydrolysis-resisting agent etc.
Why the thickness of coating part 13 is below the above 100 μ m of 10 μ m, if be owing to being less than 10 μ m, being difficult to give flame retardant resistance, being difficult to be coated with to form by wet type and exceed the such thick film of 100 μ m.Due to as long as the thickness of coating part 13 is 10 μ m below above 100 μ m, just can not have a negative impact to transmission loss in addition.
Why coating part 13 has more than 30% area below 90% with respect to the area of the one side of resin molding 11, if be owing to being less than 30%, adhesive film 10,20,30 and conductor is bonding unstable, resin molding 11 is contacted with conductor, and the transport property of the flat cable of making of adhesive film 10,20,30 is unstable.In addition, if exceed 90%, can not obtain the effect that makes fully relative permittivity reduce, be difficult to tackle radio-frequency signal with the flat cable that adhesive film 10,20,30 is made and transmit.
Why coating part 13 is at least present in the edge part 15 of resin molding 11, due to by adhesive film 10,20,30 laminating being made after flat cable, when adhesive film 10,20,30 is being rolled into web-like preserves, adhesive film 10,20,30 can be along edge part 15 by seamlessly bonding or closely sealed, thereby can prevent that foreign matter, moisture from invading to inside from the outside of adhesive film 10,20,30.
Then, the flat cable in the present invention is described.Here, as an example, the flat cable of the adhesive film 20 that uses Fig. 2 is described.
As Fig. 4 (a) with (b), the flat cable 40 in present embodiment is characterised in that, covers conductor 41 by connecing film 20 clampings.Now, as conductor 41, can use for example flat copper conductor.
In this flat cable 40, used coating part 13 to be at least present in the adhesive film 20 of the edge part 15 of resin molding 11, therefore, two resin moldings 11 of clamping conductor 41 along its edge part 15 by seamlessly bonding.By this way, by the continuous region that does not have non-coating part being set as edge part and by it is closely sealed and seamlessly sealing can prevent that foreign matter, moisture from invading to inside from the outside of adhesive film 20.
In addition, because the non-coating part 14 forming regularly becomes the air isolation portion of configuration equably, so can suppress the relative permittivity of adhesive film 20, it is integrally reduced equably, can make the transmission loss in the radio-frequency signal transmission of flat cable 40 little.
Here, as shown in Figure 5, around flat cable 40, be provided with if the flat cable 50 of the band shielding of screen layer 52 across spacer 51, further preferred because EMI characteristic etc. improves.
Like this, according to the present invention, just can provide reply radio-frequency signal transmission and in the time making after flat cable, preserve adhesive film, foreign matter, moisture can not invade adhesive film inside adhesive film and use its flat cable.
Embodiment
Then, embodiments of the invention are described.
Table 1
Table 2
Table 3
Embodiment 1
The film that corona treatment is carried out on the surface that use is the polyethylene terephthalate film (east beautiful (strain) society system: TORELINA) of 25 μ m using thickness is as resin molding, with the hot-melt adhesive of roller coating machine composition 1 in coating table 1 on this corona treatment face with circular projection, the mode that becomes 60 μ m with thickness forms adhesive linkage, the adhesive film of shape shown in construction drawing 1.Here, so-called adhesive linkage is the part that is equivalent to coating part.It is 30% that the area of coating part is made as with respect to the area of the corona treatment face of resin molding.
If the specific inductivity of adhesive linkage is below 2.80, can think and be suitable as radio-frequency signal transmission adhesive film, the specific inductivity that the adhesive film of embodiment 1 confirms adhesive linkage under 5GHz is 1.7, as radio-frequency signal, transmission is suitable with adhesive film.
Then, the mode by the flat copper conductor of 50 width 0.3mm, thickness 35 μ m take spacing as 0.5mm is side by side parallel, and clamping is covered between these two adhesive films, thereby makes flat cable.
If flat copper conductor directly contacts with resin molding with the state deflection of flat cable, transport property can produce deviation, therefore, just can not use as flat cable in this case, the section of observing the flat cable of embodiment 1, results verification is not directly contacted with resin molding to flat copper conductor.
Further around this flat cable, form screen layer across spacer, thereby make the flat cable of band shielding.
The transport property of the flat cable by the eye pattern under 5Gbps to this band shielding is evaluated, and results verification arrives, and eye pattern is good, can transmit the signal of 5Gbps.
Embodiment 2
The film that corona treatment is carried out on the surface that use is the polyimide film (society of Du Pont's (strain) system: KAPTON100V) of 25 μ m using thickness is as resin molding, with the hot melt adhesion film of roller coating machine composition 2 in coating table 1 on this corona treatment face with striated projection, the mode that becomes 45 μ m with thickness forms adhesive linkage, thus the adhesive film of shape shown in construction drawing 2.Here, so-called adhesive linkage is the part that is equivalent to coating part.It is 50% that the area of coating part is made as with respect to the area of the corona treatment face of resin molding.
About the adhesive film of embodiment 2, the specific inductivity that confirms adhesive linkage under 5GHz is 1.9, and as radio-frequency signal, transmission is suitable with adhesive film.
Then, the mode by the flat copper conductor of 50 width 0.3mm, thickness 35 μ m take spacing as 0.5mm is side by side parallel, and clamping is covered between these two adhesive films, thereby makes flat cable.
The section of observing the flat cable of embodiment 2, results verification is not directly contacted with resin molding to flat copper conductor.
Further around this flat cable, form screen layer across spacer, thereby make the flat cable of band shielding.
The transport property of the flat cable by the eye pattern under 5Gbps to this band shielding is evaluated, and results verification arrives, and eye pattern is good, can transmit the signal of 5Gbps.
Embodiment 3
The film that corona treatment is carried out on the surface that use is the poly (ethylene naphthalate) film (society of Di Ren Du Pont film (strain) system: TEONEX) of 25 μ m using thickness is as resin molding, the apparatus regularly roller coating machine of square protrusion is side by side coated with the hot-melt adhesive of the composition 3 in table 1 on this corona treatment face, the mode that becomes 30 μ m with thickness forms adhesive linkage, thus the adhesive film of shape shown in construction drawing 3.Here, so-called adhesive linkage is the part that is equivalent to coating part.It is 70% that the area of coating part is made as with respect to the area of the corona treatment face of resin molding.
About the adhesive film of embodiment 3, the specific inductivity that confirms adhesive linkage under 5GHz is 2.5, and as radio-frequency signal, transmission is suitable with adhesive film.
Then, the mode by the flat copper conductor of 50 width 0.3mm, thickness 35 μ m take spacing as 0.5mm is side by side parallel, and clamping is covered between these two adhesive films, thereby makes flat cable.
The section of observing the flat cable of embodiment 3, results verification is not directly contacted with resin molding to flat copper conductor.
Further around this flat cable, form screen layer across spacer, thereby make the flat cable of band shielding.
The transport property of the flat cable by the eye pattern under 5Gbps to this band shielding is evaluated, and results verification arrives, and eye pattern is good, can transmit the signal of 5Gbps.
Embodiment 4
The film that corona treatment is carried out on the surface that use is the polyethylene terephthalate film (society of Di Ren Du Pont film (strain) system: TETORON) of 25 μ m using thickness is as resin molding, with the hot-melt adhesive of roller coating machine composition 1 in coating table 1 on this corona treatment face with circular projection, the mode that becomes 20 μ m with thickness forms adhesive linkage, thus the adhesive film of shape shown in construction drawing 1.Here, so-called adhesive linkage is the part that is equivalent to coating part.It is 90% that the area of coating part is made as with respect to the area of the corona treatment face of resin molding.
About the adhesive film of embodiment 4, the specific inductivity that confirms adhesive linkage under 5GHz is 2.7, and as radio-frequency signal, transmission is suitable with adhesive film.
Then, the mode by the flat copper conductor of 50 width 0.3mm, thickness 35 μ m take spacing as 0.5mm is side by side parallel, and clamping is covered between these two adhesive films, thereby makes flat cable.
The section of observing the flat cable of embodiment 4, results verification is not directly contacted with resin molding to flat copper conductor.
Further around this flat cable, form screen layer across spacer, thereby make the flat cable of band shielding.
The transport property of the flat cable by the eye pattern under 5Gbps to this band shielding is evaluated, and results verification arrives, and eye pattern is good, can transmit the signal of 5Gbps.
Comparative example 1
The film that corona treatment is carried out on the surface that use is the polyethylene terephthalate film (society of Di Ren Du Pont film (strain) system: TETORON) of 25 μ m using thickness is as resin molding, on this corona treatment face, be coated with the hot-melt adhesive of the composition 1 in table 1 with common roller coating machine, the mode that becomes 63 μ m with thickness forms adhesive linkage, thereby makes adhesive film.Here, so-called adhesive linkage is the part that is equivalent to coating part., to be made as with respect to the area of the corona treatment face of resin molding be 100% to the area of coating part.
About the adhesive film of comparative example 1, the specific inductivity that confirms adhesive linkage under 5GHz is 3.3, and as radio-frequency signal, transmission is inappropriate with adhesive film.
Then, the mode by the flat copper conductor of 50 width 0.3mm, thickness 35 μ m take spacing as 0.5mm is side by side parallel, and clamping is covered between these two adhesive films, thereby makes flat cable.
About the adhesive film of comparative example 1, because be coated with hot-melt adhesive comprehensively, so flat copper conductor is not directly contacted with resin molding.
Further around this flat cable, form screen layer across spacer, thereby make the flat cable of band shielding.
The transport property of the flat cable by the eye pattern under 5Gbps to this band shielding is evaluated, and results verification arrives, and produces variation in eye pattern, and transmission loss is large.
Comparative example 2
The film that corona treatment is carried out on the surface that use is the poly (ethylene naphthalate) film (society of Di Ren Du Pont film (strain) system: TEONEX) of 25 μ m using thickness is as resin molding, with the hot-melt adhesive of roller coating machine composition 2 in coating table 1 on this corona treatment face with striated projection, the mode that becomes 18 μ m with thickness forms adhesive linkage, thus the adhesive film of shape shown in construction drawing 2.Here, so-called adhesive linkage is the part that is equivalent to coating part.It is 20% that the area of coating part is made as with respect to the area of the corona treatment face of resin molding.
About the adhesive film of comparative example 2, the specific inductivity that confirms adhesive linkage under 5GHz is 1.6, and as radio-frequency signal, transmission is suitable with adhesive film.
Then, the mode by the flat copper conductor of 50 width 0.3mm, thickness 35 μ m take spacing as 0.5mm is side by side parallel, and clamping is covered between these two adhesive films, thereby makes flat cable.
The section of the flat cable of observation and comparison example 2, results verification is to the flat copper conductor deflection of the part not contacting with adhesive linkage and be directly contacted with resin molding, and transport property changes, and therefore can not use as flat cable.
Here, can not use as flat cable because known, so do not evaluate the eye pattern under 5Gbps.
As mentioned above, confirm, by coating part thickness be the above 100 μ m of 10 μ m following, have with respect to the area of the one side of resin molding and be more than 30% area below 90%, be at least present in the edge part of resin molding, can obtain the flat cable that reply radio-frequency signal transmits.
Claims (3)
1. an adhesive film, it,, for to have the adhesive film that is coated with the coating part of hot-melt adhesive and the non-coating part of uncoated described hot-melt adhesive on the one side of resin molding, is characterized in that,
Described coating part thickness is below the above 100 μ m of 10 μ m, and having with respect to the area of the one side of described resin molding is more than 30% area below 90%, is at least present in the edge part of described resin molding.
2. adhesive film according to claim 1, described non-coating part is point-like, striated or the Polygons that is present in regularly the one side of described resin molding.
3. a flat cable, is characterized in that, conductor is covered by the adhesive film clamping described in claim 1 or 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012250237A JP2014098087A (en) | 2012-11-14 | 2012-11-14 | Adhesive film and flat cable using the same |
| JP2012-250237 | 2012-11-14 |
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| Publication Number | Publication Date |
|---|---|
| CN103805080A true CN103805080A (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310464661.5A Pending CN103805080A (en) | 2012-11-14 | 2013-10-08 | Adhesive film and flat cable with the same |
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| JP (1) | JP2014098087A (en) |
| CN (1) | CN103805080A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673137A (en) * | 2015-02-09 | 2015-06-03 | 常州大学 | Halogen-free hot melting adhesion agent suitable for flexible flat cable as well as preparation method and application thereof |
| CN107658057A (en) * | 2016-07-25 | 2018-02-02 | 尹熙畯 | Flexible flat cable |
| CN109321155A (en) * | 2018-09-18 | 2019-02-12 | 广东莱尔新材料科技股份有限公司 | A kind of hot melt adhesive film and preparation method of the salt fog resistance improving flat copper wire |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103351A (en) * | 2014-07-14 | 2014-10-15 | 亳州联滔电子有限公司 | Flat cable |
| KR101860815B1 (en) * | 2016-07-25 | 2018-05-25 | 윤희준 | Flexible flat cable |
| EP4141059A1 (en) | 2021-08-31 | 2023-03-01 | Clariant International Ltd | Diorganylphosphinic salts having exceptional surface structure |
-
2012
- 2012-11-14 JP JP2012250237A patent/JP2014098087A/en active Pending
-
2013
- 2013-10-08 CN CN201310464661.5A patent/CN103805080A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673137A (en) * | 2015-02-09 | 2015-06-03 | 常州大学 | Halogen-free hot melting adhesion agent suitable for flexible flat cable as well as preparation method and application thereof |
| CN107658057A (en) * | 2016-07-25 | 2018-02-02 | 尹熙畯 | Flexible flat cable |
| CN112102988A (en) * | 2016-07-25 | 2020-12-18 | 尹熙畯 | Flexible flat cable |
| CN109321155A (en) * | 2018-09-18 | 2019-02-12 | 广东莱尔新材料科技股份有限公司 | A kind of hot melt adhesive film and preparation method of the salt fog resistance improving flat copper wire |
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| Publication number | Publication date |
|---|---|
| JP2014098087A (en) | 2014-05-29 |
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Application publication date: 20140521 |