EP2074188A1 - Laminating film of plastic/teflon-silicon and method for preparing the same - Google Patents
Laminating film of plastic/teflon-silicon and method for preparing the sameInfo
- Publication number
- EP2074188A1 EP2074188A1 EP07833286A EP07833286A EP2074188A1 EP 2074188 A1 EP2074188 A1 EP 2074188A1 EP 07833286 A EP07833286 A EP 07833286A EP 07833286 A EP07833286 A EP 07833286A EP 2074188 A1 EP2074188 A1 EP 2074188A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- teflon
- plastic
- silicon
- film
- coupling agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 50
- 239000004033 plastic Substances 0.000 title claims abstract description 50
- 239000010703 silicon Substances 0.000 title claims abstract description 46
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 46
- 238000010030 laminating Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000004809 Teflon Substances 0.000 claims abstract description 47
- 229920006362 Teflon® Polymers 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 44
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 41
- 125000000524 functional group Chemical group 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000009832 plasma treatment Methods 0.000 claims description 29
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 6
- 125000003700 epoxy group Chemical group 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229920006267 polyester film Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920006289 polycarbonate film Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 230000003213 activating effect Effects 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 150000003606 tin compounds Chemical class 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000011256 inorganic filler Substances 0.000 description 5
- 229910003475 inorganic filler Inorganic materials 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
Classifications
-
- 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
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
Definitions
- the present invention relates to a laminating film of plastic/Teflon-silicon and a method for preparing the same, more precisely a laminating film of plastic/Teflon-silicon with improved bond strength between plastic or Teflon and silicon rubber resulted from the processes of activating the reactive functional group by treating the surface of the plastic or Teflon substrate with plasma and adding silane coupling agent forming chemical bond with the above reactive functional group to the silicon rubber, and a method for preparing the same.
- Silicon rubber has excellent heat resistance and electric insulating property in addition to elasticity peculiar to rubber, so that it has been used as a gasket for various electronic products.
- the silicon rubber shows problems that it is not only difficult to laminate to other substrate for its intrinsic release properties but also has poor dimensional stability during rework for its elastic hysteresis.
- silicon rubber it has been attempted to attach silicon rubber to a plastic substrate such as polyester film using a bonding agent or a tape coated with an adhesive. But, in that case, silicon rubber is bonded physically with the adhesive coated tape, suggesting that it can be easily separated from each other by a certain impact (given from outside) such as heat.
- silicon rubber Owing to its excellent heat resistance, electric insulating property, and elasticity peculiar to rubber, silicon rubber has widely been used for producing LCD and PDP panels and as a bonding sheet for the attachment of those panels to flexible printed circuit (FPC).
- the silicon rubber has intrinsic release property and (it) also shows weak surface adhesion properties, so that anisotropic conducting film (ACF) coupling panels and FPC is tend to adhere on the rubber surface, which might be a reason for a poor product.
- ACF anisotropic conducting film
- Teflon film having excellent release property can be used.
- this film is easily deformed by heat and as a result showing a short life-time. Therefore, the bonding sheet is separately feeded by installing the Teflon film having excellent release property in the (bottom) lower part and the silicon rubber having excellent heat resistance and elasticity in the upper part.
- the present inventors tried to overcome the above problems and finally completed this invention by confirming that the binding force between the plastic or Teflon substrate and silicon rubber can be significantly increased by the processes of generating the reactive functional group by treating the surface of the plastic or Teflon substrate with plasma; coating liquid silicone rubber (LSR) containing silane coupling agent forming chemical bond with the reactive functional group onto the plastic or Teflon substrate; and curing thereof.
- LSR liquid silicone rubber
- An (The) object of the present invention is to provide a laminating film of plastic/Teflon-silicon contributing to the significant increase of bonding strength between the plastic or Teflon substrate and silicon rubber.
- Another object of the present invention is to provide a method for preparing the laminating film of plastic/Teflon-silicon.
- the present invention provides a laminating film of plastic/Teflon-silicon which contains the plastic or Teflon substrate having the reactive functional group generated on its surface by plasma treatment; silane coupling agent forming chemical bond with the reactive functional group; and silicon rubber containing the silane coupling agent and being coated on the plastic or Teflon substrate.
- the present invention also provides a method for preparing the laminating film of plastic-silicon, comprising the following steps: i ) generating the reactive functional group on the surface of the plastic or Teflon substrate by plasma treatment; and i i ) coating the surface of the plastic or Teflon substrate with liquid silicon rubber containing silane coupling agent for the chemical bonding with the above reactive functional group and curing thereof.
- the present invention is described in detail hereinafter. i ) Generating reactive functional group on the surface of the plastic or Teflon substrate by plasma treatment
- plasma treatment is performed on the surface of the plastic or Teflon substrate in order to increase the bond strength between the plastic or Teflon substrate and the liquid silicon rubber coated on the substrate.
- the plasma treatment is performed under the general condition but it is preferably carried out under the pressure of up to 1 x 10 '3 torr for the effective generation of the reactive functional group on the surface of the plastic or Teflon substrate. If the plasma treatment is performed under the higher pressure, arc discharge resulted by impurities will be a problem or generation density of the reactive functional group might be reduced because of scattering.
- the amounts of oxygen and argon injected into ion gun for the plasma treatment are not limited, but the weight ratio of oxygen to argon is preferably 1 :1 - 4:1.
- the induced voltage is preferably 10 - 4000 W, more preferably, 100 - 3000 W.
- plastic substrate not only a film with a polar group on its surface but also an olefin based film with a nonpolar group can be used.
- films used for electronic material such as polyethylene film, polypropylene film, polystyrene film, polyester film, polyamide film, polyimide film, polycarbonate film, and tetraacetylcellulose film are preferred.
- the Teflon film of the present invention includes not only the Teflon film itself but also a fabric sheet containing glass fiber to increase dimensional stability and tensile strength of the laminating film. ii ) Coating liquid silicon rubber containing silane coupling agent on the surface of the plastic or Teflon substrate and curing thereof
- the surface of the plastic or Teflon substrate is coated with liquid silicon rubber containing silane coupling agent that is chemically bonded to the reactive functional group formed on the surface of the plastic or Teflon substrate, followed by curing.
- the silane coupling agent herein increases bonding strength by inducing polymerization reaction between the plastic or Teflon substrate and the silicon rubber.
- the silane coupling agent can be one or more compounds selected from the compounds represented by the following formula 1. [Formula 1 ]
- R 1 is hydrogen or vinyl group
- R 2 - R4 are Ci - Ci 8 alkyl group or C 3 - C-i ⁇ alkyl group having epoxy group at terminal.
- the preferable content of the silane coupling agent is 0.1 - 30 weight part for 100 weight part of silicon rubber and 0.5 - 15 weight part is more preferred. If the content of the silane coupling agent is less than 0.1 weight part, bonding strength will be decreased. If the content is more than 30 weight part, air bubbles will be formed because of by-products, which results in poor bonding strength as well.
- a tin compound can be used as a catalyst to induce satisfactory reaction of the silane coupling agent with the reactive functional group formed on the surface of the plastic or Teflon film and this tin compound is represented by the following formula 2. [Formula 2]
- R 5 - Rs are Ci - Ci 8 alkyl group.
- the content of the catalyst is 0.05 - 5 weight part for 100 weight part of silicon rubber and 0.1 - 2 weight part is more preferred.
- the silicon rubber can be produced from the materials comprising dimethyl siloxane, siloxane with vinyl group and siloxane based cross-linking agent, but not (always) limited thereto.
- the liquid silicon rubber can additionally contain inorganic fillers, liquid silicon curing catalysts, and physical property modifiers, in addition to curing agents.
- Figure 1 is a photograph showing the contact angle of the surface of the plastic substrate before the plasma treatment.
- Figure 2 is a photograph showing the contact angle of the surface of the plastic substrate right after the plasma treatment.
- Figure 3 is a photograph showing the contact angle of the surface of the plastic substrate 24 hours after the plasma treatment.
- Figure 4 is a photograph showing the contact angle of the surface of the Teflon substrate before the plasma treatment.
- Figure 5 is a photograph showing the contact angle of the surface of the Teflon substrate right after the plasma treatment.
- Figure 6 is a photograph showing the contact angle of the surface of the
- the reactive functional group was generated on the surface of the polyethylene terephthalate (PET) film by using plasma processing apparatus (weight ratio of oxygen to argon: 4:1 , induced voltage: 1 ,000V / 0.2-1. OA (200-1000W)).
- the surface of the plastic film treated with plasma was coated with the liquid silicon rubber composition
- the liquid silicon rubber composition comprising 55 weight part of liquid silicon [Poly(dimethyl siloxane) fluid] finished with vinyl group, 3 weight part of a curing agent [Poly(methylhydro siloxane-co-dimethyl siloxane) fluid], 40 weight part of an inorganic filler (alumina), 0.5 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a platinum based liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier (silica nano-particles), followed by curing at 100 0 C for 5 minutes, resulting in the laminating film of plastic- silicon.
- the surface of the plastic film non-treated with plasma was coated with the liquid silicon rubber composition comprising 40.5 weight part of liquid silicon finished with vinyl group, 3 weight part of a curing agent, 40 weight part of an inorganic filler, 15 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier, followed by curing at 100 0 C for 5 minutes, resulting in the laminating film of plastic-silicon.
- the liquid silicon rubber composition comprising 40.5 weight part of liquid silicon finished with vinyl group, 3 weight part of a curing agent, 40 weight part of an inorganic filler, 15 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier, followed by curing at 100 0 C for 5 minutes, resulting in the laminating film of plastic-silicon.
- Comparative Example 2 An experiment was performed by the same manner as described in example 1 except that the content of the liquid silicon finished with vinyl group was adjusted to 55.6 weight part and the silane coupling agent was not used.
- Example 5 The reactive functional group was generated on the surface of the Teflon film by using plasma processing apparatus (weight ratio of oxygen to argon: 4:1 , induced voltage: 1 ,500V / 0.2-1.0A (300-1 ,500W)).
- the surface of the Teflon film treated with plasma was coated with the liquid silicon rubber composition comprising 55 weight part of liquid silicon [Poly(dimethyl siloxane) fluid] finished with vinyl group, 3 weight part of a curing agent [Poly(methylhydro siloxane-co-dimethyl siloxane) fluid], 40 weight part of an inorganic filler (alumina), 0.5 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a platinum based liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier (silica nano- particles), followed by curing at 100 ° C for 5 minutes, resulting in the laminating film of Teflon-silicon.
- a curing agent Poly(methylhydro siloxane-co-dimethyl siloxane) fluid
- Example 5 An experiment was performed by the same manner as described in example 5 except that 40.5 weight part of liquid silicon finished with vinyl group and 15 weight part of a silane coupling agent were used.
- Example 8 An experiment was performed by the same manner as described in example 5 except that 48.6 weight part of liquid silicon finished with vinyl group, 5 weight part of a silane coupling agent and 2 weight part of a tin compound catalyst were used. Comparative Example 3
- the surface of the Teflon film non-treated with plasma was coated with the liquid silicon rubber composition comprising 40.5 weight part of liquid silicon finished with vinyl group, 3 weight part of a curing agent, 40 weight part of an inorganic filler, 15 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier, followed by curing at 100 0 C for 5 minutes, resulting in the laminating film of Teflon-silicon.
- the liquid silicon rubber composition comprising 40.5 weight part of liquid silicon finished with vinyl group, 3 weight part of a curing agent, 40 weight part of an inorganic filler, 15 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier, followed by curing at 100 0 C for 5 minutes, resulting in the laminating film of Tefl
- the laminating film of plastic/Teflon-silicon of the present invention has significantly improved bond strength (force) between the plastic or Teflon substrate and silicon rubber by chemical bond between the reactive functional group formed on the surface of the plastic or Teflon substrate by plasma treatment and the silane coupling agent included in the silicon rubber.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
The present invention relates to a laminating film of plastic/Teflon-silicon and a method for preparing the same, more precisely a laminating film of plastic/Teflon-silicon with improved bond strength between plastic or Teflon with silicon rubber resulted from the processes of activating the reactive functional group by treating the surface of the plastic or Teflon substrate with plasma and coating the surface of the plastic or Teflon substrate with liquid silicon rubber containing silane coupling agent forming chemical bond with the reactive functional group and curing thereof, and a method for preparing the same.
Description
LAMINATING FILM OF PLASTIC/TEFLON-SILICON AND METHOD FOR PREPARING THE SAME
[Technical Field] The present invention relates to a laminating film of plastic/Teflon-silicon and a method for preparing the same, more precisely a laminating film of plastic/Teflon-silicon with improved bond strength between plastic or Teflon and silicon rubber resulted from the processes of activating the reactive functional group by treating the surface of the plastic or Teflon substrate with plasma and adding silane coupling agent forming chemical bond with the above reactive functional group to the silicon rubber, and a method for preparing the same.
[Background Art]
Silicon rubber has excellent heat resistance and electric insulating property in addition to elasticity peculiar to rubber, so that it has been used as a gasket for various electronic products.
However, the silicon rubber shows problems that it is not only difficult to laminate to other substrate for its intrinsic release properties but also has poor dimensional stability during rework for its elastic hysteresis. To solve the above problems of silicon rubber, it has been attempted to attach silicon rubber to a plastic substrate such as polyester film using a bonding agent or a tape coated with an adhesive. But, in that case, silicon rubber is bonded physically with the adhesive coated tape, suggesting that it can be easily separated from each other by a certain impact (given from outside) such as heat. Owing to its excellent heat resistance, electric insulating property, and
elasticity peculiar to rubber, silicon rubber has widely been used for producing LCD and PDP panels and as a bonding sheet for the attachment of those panels to flexible printed circuit (FPC).
However, even though as a bonding sheet, the silicon rubber has intrinsic release property and (it) also shows weak surface adhesion properties, so that anisotropic conducting film (ACF) coupling panels and FPC is tend to adhere on the rubber surface, which might be a reason for a poor product.
To solve the above problem, Teflon film having excellent release property can be used. However, this film is easily deformed by heat and as a result showing a short life-time. Therefore, the bonding sheet is separately feeded by installing the Teflon film having excellent release property in the (bottom) lower part and the silicon rubber having excellent heat resistance and elasticity in the upper part.
The present inventors tried to overcome the above problems and finally completed this invention by confirming that the binding force between the plastic or Teflon substrate and silicon rubber can be significantly increased by the processes of generating the reactive functional group by treating the surface of the plastic or Teflon substrate with plasma; coating liquid silicone rubber (LSR) containing silane coupling agent forming chemical bond with the reactive functional group onto the plastic or Teflon substrate; and curing thereof.
[Disclosure]
[Technical Problem]
To solve the above problems of conventional arts, inventors have been studied and found that the bond strength is increased significantly by generating
reactive functional group on the plastic or Teflon substrate surface by plasma treatment, and by coating Liquid Silicon Rubber(LSR) containing silane coupling agent forming chemical bond with the reactive functional group to the plastic or Teflon substrate and then by curing thereof. An (The) object of the present invention is to provide a laminating film of plastic/Teflon-silicon contributing to the significant increase of bonding strength between the plastic or Teflon substrate and silicon rubber.
Another object of the present invention is to provide a method for preparing the laminating film of plastic/Teflon-silicon.
[Technical Solution]
To achieve the above objects, the present invention provides a laminating film of plastic/Teflon-silicon which contains the plastic or Teflon substrate having the reactive functional group generated on its surface by plasma treatment; silane coupling agent forming chemical bond with the reactive functional group; and silicon rubber containing the silane coupling agent and being coated on the plastic or Teflon substrate.
The present invention also provides a method for preparing the laminating film of plastic-silicon, comprising the following steps: i ) generating the reactive functional group on the surface of the plastic or Teflon substrate by plasma treatment; and i i ) coating the surface of the plastic or Teflon substrate with liquid silicon rubber containing silane coupling agent for the chemical bonding with the above reactive functional group and curing thereof. The present invention is described in detail hereinafter.
i ) Generating reactive functional group on the surface of the plastic or Teflon substrate by plasma treatment
In this step, plasma treatment is performed on the surface of the plastic or Teflon substrate in order to increase the bond strength between the plastic or Teflon substrate and the liquid silicon rubber coated on the substrate. By the plasma treatment, the reactive functional group is generated on the surface of the plastic or Teflon substrate, which is probably containing oxygen in the reactive functional group such as -OH, -OOH, -COOH, -C-O-, -C=O, -O-C-O-, etc. The plasma treatment is performed under the general condition but it is preferably carried out under the pressure of up to 1 x 10'3 torr for the effective generation of the reactive functional group on the surface of the plastic or Teflon substrate. If the plasma treatment is performed under the higher pressure, arc discharge resulted by impurities will be a problem or generation density of the reactive functional group might be reduced because of scattering.
The amounts of oxygen and argon injected into ion gun for the plasma treatment are not limited, but the weight ratio of oxygen to argon is preferably 1 :1 - 4:1.
As the induced voltage increases during the plasma formation, discharging density of the plasma increases, resulting in the increase of the generation of the reactive functional group on the surface of the plastic substrate.
So, the induced voltage is preferably 10 - 4000 W, more preferably, 100 - 3000 W.
It is generally expected that surface etching will be observed after the plasma treatment. However, as shown in Figure 1 - Figure 3, contact angles of PET before the plasma treatment (Figure 1), right after the plasma treatment
(Figure 2) and 24 hours after the plasma treatment (Figure 3), were respectively 67.27°, 3.27° and 39.86°. And contact angles of Teflon before the plasma treatment (Figure 4), right after the plasma treatment (Figure 5) and 24 hours after the plasma treatment (Figure 6), were respectively 109.46°, 24.25° and 47.37°. Theses results indicate that the reactive functional groups are generated on the surface of the plastic or Teflon substrate by the plasma treatment but as time went by those reactive functional groups are reduced by the reaction with substances in the air. So, it was confirmed that the plastic or Teflon substrate of the present invention can have reactive functional groups on its surface after plasma treatment.
As the plastic substrate, not only a film with a polar group on its surface but also an olefin based film with a nonpolar group can be used. In particular, films used for electronic material such as polyethylene film, polypropylene film, polystyrene film, polyester film, polyamide film, polyimide film, polycarbonate film, and tetraacetylcellulose film are preferred.
The Teflon film of the present invention includes not only the Teflon film itself but also a fabric sheet containing glass fiber to increase dimensional stability and tensile strength of the laminating film. ii ) Coating liquid silicon rubber containing silane coupling agent on the surface of the plastic or Teflon substrate and curing thereof
In this step, the surface of the plastic or Teflon substrate is coated with liquid silicon rubber containing silane coupling agent that is chemically bonded to the reactive functional group formed on the surface of the plastic or Teflon substrate, followed by curing. The silane coupling agent herein increases bonding strength by inducing polymerization reaction between the plastic or
Teflon substrate and the silicon rubber.
The silane coupling agent can be one or more compounds selected from the compounds represented by the following formula 1. [Formula 1 ]
I ό
O
I
R1-O-Sj-O-R2
I
O
(Wherein, R1 is hydrogen or vinyl group, and R2 - R4 are Ci - Ci8 alkyl group or C3 - C-iβ alkyl group having epoxy group at terminal.)
The preferable content of the silane coupling agent is 0.1 - 30 weight part for 100 weight part of silicon rubber and 0.5 - 15 weight part is more preferred. If the content of the silane coupling agent is less than 0.1 weight part, bonding strength will be decreased. If the content is more than 30 weight part, air bubbles will be formed because of by-products, which results in poor bonding strength as well.
In the present invention, a tin compound can be used as a catalyst to induce satisfactory reaction of the silane coupling agent with the reactive functional group formed on the surface of the plastic or Teflon film and this tin compound is represented by the following formula 2. [Formula 2]
I
R.
(Wherein, R5 - Rs are Ci - Ci8 alkyl group.)
The content of the catalyst is 0.05 - 5 weight part for 100 weight part of silicon rubber and 0.1 - 2 weight part is more preferred. The silicon rubber can be produced from the materials comprising dimethyl siloxane, siloxane with vinyl group and siloxane based cross-linking agent, but not (always) limited thereto.
The liquid silicon rubber can additionally contain inorganic fillers, liquid silicon curing catalysts, and physical property modifiers, in addition to curing agents.
[Description of Drawings]
The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:
Figure 1 is a photograph showing the contact angle of the surface of the plastic substrate before the plasma treatment.
Figure 2 is a photograph showing the contact angle of the surface of the plastic substrate right after the plasma treatment.
Figure 3 is a photograph showing the contact angle of the surface of the plastic substrate 24 hours after the plasma treatment.
Figure 4 is a photograph showing the contact angle of the surface of the Teflon substrate before the plasma treatment.
Figure 5 is a photograph showing the contact angle of the surface of the Teflon substrate right after the plasma treatment. Figure 6 is a photograph showing the contact angle of the surface of the
Teflon substrate 24 hours after the plasma treatment.
[Best Mode]
Hereinafter, the embodiments of the present invention will be described in detail with reference to accompanying drawings.
[Examples] Example 1
The reactive functional group was generated on the surface of the polyethylene terephthalate (PET) film by using plasma processing apparatus (weight ratio of oxygen to argon: 4:1 , induced voltage: 1 ,000V / 0.2-1. OA (200-1000W)).
The surface of the plastic film treated with plasma was coated with the liquid silicon rubber composition comprising 55 weight part of liquid silicon [Poly(dimethyl siloxane) fluid] finished with vinyl group, 3 weight part of a curing agent [Poly(methylhydro siloxane-co-dimethyl siloxane) fluid], 40 weight part of an inorganic filler (alumina), 0.5 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a platinum based liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier (silica nano-particles), followed by curing at 1000C for 5 minutes, resulting in the laminating film of plastic-
silicon.
Example 2
An experiment was performed by the same manner as described in example 1 except that 25.5 weight part of liquid silicon finished with vinyl group and 30 weight part of a silane coupling agent were used.
Example 3
An experiment was performed by the same manner as described in example 1 except that 40.5 weight part of liquid silicon finished with vinyl group and 15 weight part of a silane coupling agent were used. Example 4
An experiment was performed by the same manner as described in example 1 except that 48.6 weight part of liquid silicon finished with vinyl group, 5 weight part of a silane coupling agent and 2 weight part of a tin compound catalyst were used. Comparative Example 1
The surface of the plastic film non-treated with plasma was coated with the liquid silicon rubber composition comprising 40.5 weight part of liquid silicon finished with vinyl group, 3 weight part of a curing agent, 40 weight part of an inorganic filler, 15 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier, followed by curing at 1000C for 5 minutes, resulting in the laminating film of plastic-silicon.
Comparative Example 2
An experiment was performed by the same manner as described in example 1 except that the content of the liquid silicon finished with vinyl group was adjusted to 55.6 weight part and the silane coupling agent was not used.
Example 5 The reactive functional group was generated on the surface of the Teflon film by using plasma processing apparatus (weight ratio of oxygen to argon: 4:1 , induced voltage: 1 ,500V / 0.2-1.0A (300-1 ,500W)).
The surface of the Teflon film treated with plasma was coated with the liquid silicon rubber composition comprising 55 weight part of liquid silicon [Poly(dimethyl siloxane) fluid] finished with vinyl group, 3 weight part of a curing agent [Poly(methylhydro siloxane-co-dimethyl siloxane) fluid], 40 weight part of an inorganic filler (alumina), 0.5 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a platinum based liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier (silica nano- particles), followed by curing at 100°C for 5 minutes, resulting in the laminating film of Teflon-silicon.
Example 6
An experiment was performed by the same manner as described in example 5 except that 25.5 weight part of liquid silicon finished with vinyl group and 30 weight part of a silane coupling agent were used.
Example 7
An experiment was performed by the same manner as described in example 5 except that 40.5 weight part of liquid silicon finished with vinyl group and 15 weight part of a silane coupling agent were used. Example 8
An experiment was performed by the same manner as described in example 5 except that 48.6 weight part of liquid silicon finished with vinyl group, 5 weight part of a silane coupling agent and 2 weight part of a tin compound catalyst were used. Comparative Example 3
The surface of the Teflon film non-treated with plasma was coated with the liquid silicon rubber composition comprising 40.5 weight part of liquid silicon finished with vinyl group, 3 weight part of a curing agent, 40 weight part of an inorganic filler, 15 weight part of a silane coupling agent, 0.1 weight part of a tin compound catalyst, 0.5 weight part of a liquid silicon curing catalyst, and 0.9 weight part of a physical property modifier, followed by curing at 1000C for 5 minutes, resulting in the laminating film of Teflon-silicon. Comparative Example 4
An experiment was performed by the same manner as described in example 5 except that the content of the liquid silicon finished with vinyl group was adjusted to 55.6 weight part and the silane coupling agent was not used. [Experimental Example]
The plastic-silicon films prepared in examples 1 - 4 and comparative examples 1 - 2, and the Teflon-silicon films prepared in examples 5 - 8 and comparative examples 3 - 4 proceeded to peel test and the results are shown in Table 1 and Table 2. [Table 1 ]
As shown in Table 1 , peeling was observed after 24 hours from the production in the plastic film non-treated with plasma of comparative example 1 and the film treated with plasma but not containing the silane coupling agent of comparative example 2. On the contrary, the films of examples 1 - 4, treated with plasma and coated with liquid silicon rubber containing the silane coupling agent, were not peeled after 24 hours from the production and even after 500 hours at 120 °C . [Table 2]
As shown in Table 2, peeling was observed after 24 hours from the production in the Teflon film non-treated with plasma of comparative example 3 and the film treated with plasma but not containing the silane coupling agent of comparative example 4. On the contrary, the Teflon films of examples 5 - 8,
treated with plasma and coated with liquid silicon rubber containing the silane coupling agent, were not peeled after 24 hours from the production and even after 500 hours at 120°C .
[Industrial Applicability]
The laminating film of plastic/Teflon-silicon of the present invention has significantly improved bond strength (force) between the plastic or Teflon substrate and silicon rubber by chemical bond between the reactive functional group formed on the surface of the plastic or Teflon substrate by plasma treatment and the silane coupling agent included in the silicon rubber.
Claims
[CLAIMS]
[Claim 1 ]
A laminating film of plastic-silicon which contains the plastic substrate having the reactive functional group generated on its surface by plasma treatment; a silane coupling agent forming chemical bond with the reactive functional group; and silicon rubber containing the silane coupling agent to be coated on the plastic substrate.
[Claim 2] The laminating film of plastic-silicon according to claim 1 , wherein the silane coupling agent is represented by the following formula 1. [Formula 1]
I ό
O
Ri-O-Si-O-R2 0 I R4
(Wherein, Ri is hydrogen or vinyl group, and R2 - RA are Ci - C18 alkyl group or C3 - C-iβ alkyl group having epoxy group at terminal.)
[Claim 3]
The laminating film of plastic-silicon according to claim 1 , wherein the content of the silane coupling agent is 0.1 - 30 weight part for 100 weight part of the whole silicon rubber.
[Claim 4]
The laminating film of plastic-silicon according to claim 1 , wherein the silicon rubber additionally contains a catalyst having the structure represented by the following formula 2. [Formula 2]
Rr
I
R8
(Wherein, R5 - Rs are C1 - Ci8 alkyl group.)
[Claim 5] The laminating film of plastic-silicon according to claim 1 , wherein the plastic substrate is selected from the group consisting of polyethylene film, polypropylene film, polystyrene film, polyester film, polyamide film, polyimide film, polycarbonate film, and tetraacetylcellulose film.
[Claim 6]
A method for preparing the laminating film of plastic-silicon, comprising the following steps: i ) generating the reactive functional group on the surface of the plastic substrate by plasma treatment; and ii ) coating the surface of the plastic substrate with liquid silicon rubber containing silane coupling agent for the chemical binding with the above reactive functional group and curing thereof.
[Claim 7]
A laminating film of Teflon-silicon which contains Teflon substrate having reactive functional group generated on its surface by plasma treatment; silane coupling agent applicable for the chemical binding with the reactive functional group; and silicon rubber containing the silane coupling agent to be coated on the Teflon substrate.
[Claim 8] The laminating film of Teflon-silicon according to claim 7, wherein the silane coupling agent is represented by the following formula 1. [Formula 1]
(Wherein, R1 is hydrogen or vinyl group, and R2 - R4 are Ci - Ci8 alkyl group or C3 - C-is alkyl group having epoxy group at terminal.)
[Claim 9]
The laminating film of Teflon-silicon according to claim 7, wherein the content of the silane coupling agent is 0.1 - 30 weight part for 100 weight part of the whole silicon rubber.
[Claim 10]
The laminating film of Teflon-silicon according to claim 7, wherein the silicon rubber additionally contains a catalyst having the structure represented by the following formula 2. [Formula 2]
R5-Sn-R6
I
R,
(Wherein, R5 - R5 are Ci - Ci8 alkyl group.)
[Claim 11] The laminating film of Teflon-silicon according to claim 7, wherein the
Teflon substrate is a fabric sheet containing glass fiber.
[Claim 12]
A method for preparing the laminating film of Teflon-silicon, comprising the following steps: i ) generating the reactive functional group on the surface of the Teflon substrate by plasma treatment; and i i ) coating the surface of the Teflon substrate with liquid silicon rubber containing silane coupling agent for the chemical binding with the above reactive functional group and curing thereof.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060100034A KR100871608B1 (en) | 2006-10-13 | 2006-10-13 | Teflon-silicon adhesive film and manufacturing method thereof |
| KR1020060100035A KR100871609B1 (en) | 2006-10-13 | 2006-10-13 | Plastic-silicon adhesive film and manufacturing method thereof |
| PCT/KR2007/004975 WO2008044884A1 (en) | 2006-10-13 | 2007-10-11 | Laminating film of plastic/teflon-silicon and method for preparing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2074188A1 true EP2074188A1 (en) | 2009-07-01 |
Family
ID=39283042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07833286A Withdrawn EP2074188A1 (en) | 2006-10-13 | 2007-10-11 | Laminating film of plastic/teflon-silicon and method for preparing the same |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2074188A1 (en) |
| WO (1) | WO2008044884A1 (en) |
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| WO2022051118A1 (en) | 2020-09-03 | 2022-03-10 | NEXA3D Inc. | Multi-material membrane for vat polymerization printer |
| WO2023133105A1 (en) | 2022-01-10 | 2023-07-13 | NEXA3D Inc. | Oled light source and multi-material membrane for vat polymerization printer |
| WO2023132957A1 (en) | 2022-01-10 | 2023-07-13 | NEXA3D Inc. | Multi-material membrane for vat polymerization printer |
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| CH702731A1 (en) * | 2010-02-25 | 2011-08-31 | Biwi Sa | A method of manufacturing a part comprising an elastomer coating and said workpiece obtained. |
| US10543662B2 (en) | 2012-02-08 | 2020-01-28 | Corning Incorporated | Device modified substrate article and methods for making |
| WO2015157202A1 (en) | 2014-04-09 | 2015-10-15 | Corning Incorporated | Device modified substrate article and methods for making |
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| US9340443B2 (en) | 2012-12-13 | 2016-05-17 | Corning Incorporated | Bulk annealing of glass sheets |
| TWI617437B (en) | 2012-12-13 | 2018-03-11 | 康寧公司 | Facilitated processing for controlling bonding between sheet and carrier |
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| JP2018524201A (en) | 2015-05-19 | 2018-08-30 | コーニング インコーポレイテッド | Articles and methods for bonding sheets with carriers |
| CN107810168A (en) | 2015-06-26 | 2018-03-16 | 康宁股份有限公司 | Method and product comprising sheet material and carrier |
| TW202216444A (en) | 2016-08-30 | 2022-05-01 | 美商康寧公司 | Siloxane plasma polymers for sheet bonding |
| TWI810161B (en) | 2016-08-31 | 2023-08-01 | 美商康寧公司 | Articles of controllably bonded sheets and methods for making same |
| DE102016225227B4 (en) | 2016-12-16 | 2025-04-30 | Robert Bosch Gmbh | Process for the additive manufacturing of a three-dimensional object |
| KR102659516B1 (en) | 2017-08-18 | 2024-04-23 | 코닝 인코포레이티드 | glass laminate |
| WO2019118660A1 (en) | 2017-12-15 | 2019-06-20 | Corning Incorporated | Method for treating a substrate and method for making articles comprising bonded sheets |
| WO2019208800A1 (en) * | 2018-04-26 | 2019-10-31 | 株式会社ブリヂストン | Resin-rubber composite, tire, and production method for resin-rubber composite |
| JP7312411B2 (en) * | 2018-04-26 | 2023-07-21 | 株式会社ブリヂストン | RESIN-RUBBER COMPOSITE, TIRE, AND METHOD FOR MANUFACTURING RESIN-RUBBER COMPOSITE |
| US12163028B2 (en) | 2018-04-26 | 2024-12-10 | Bridgestone Corporation | Resin-rubber composite, tire, and method of producing resin-rubber composite |
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| JP2003225972A (en) * | 2002-02-04 | 2003-08-12 | Dow Corning Toray Silicone Co Ltd | Silicone rubber composite and its manufacturing method |
| JP2007503478A (en) * | 2003-08-22 | 2007-02-22 | テサ・アクチエンゲゼルシヤフト | Method of using an adhesive film to embed an electrical module in a card body |
| KR100600497B1 (en) * | 2004-04-16 | 2006-07-13 | 한국화학연구원 | Surface modification method of silicone rubber sheet |
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| KR200419708Y1 (en) * | 2006-04-13 | 2006-06-22 | 실리콘밸리(주) | Semiconductor Chip Bonding Protection Sheet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022051118A1 (en) | 2020-09-03 | 2022-03-10 | NEXA3D Inc. | Multi-material membrane for vat polymerization printer |
| US11413819B2 (en) | 2020-09-03 | 2022-08-16 | NEXA3D Inc. | Multi-material membrane for vat polymerization printer |
| WO2023133105A1 (en) | 2022-01-10 | 2023-07-13 | NEXA3D Inc. | Oled light source and multi-material membrane for vat polymerization printer |
| WO2023132957A1 (en) | 2022-01-10 | 2023-07-13 | NEXA3D Inc. | Multi-material membrane for vat polymerization printer |
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| WO2008044884A1 (en) | 2008-04-17 |
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