CN104530996B - LCD release film and production method thereof - Google Patents
LCD release film and production method thereof Download PDFInfo
- Publication number
- CN104530996B CN104530996B CN201410735004.4A CN201410735004A CN104530996B CN 104530996 B CN104530996 B CN 104530996B CN 201410735004 A CN201410735004 A CN 201410735004A CN 104530996 B CN104530996 B CN 104530996B
- Authority
- CN
- China
- Prior art keywords
- mould release
- toluene
- lcd
- film
- monomer
- 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.)
- Active
Links
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses an LCD release film and a production method thereof. The LCD release film is obtained by treating a BOPET film as a base film and coating the BOPET film with a release agent layer; the haze of the BOPET film is not greater than 1%; raw materials of the release agent layer comprise a reactant monomer, an initiator and toluene; and the reactant monomer comprises, by mass, 10-30% of a vinyl group-containing organosilicon monomer, 30-50% of acrylic acid, 10-25% of methyl acrylate or methyl methacrylate, 8-25% of ethyl acrylate or butyl acrylate, 5-20% of styrene, and 4-10% of isobutyl methacrylate. The LCD release film has the advantages of high surface tension, moderate peel strength, excellent residual adhesion rate and the like. The measurement of the haze of the BOPET release film completely meets LCD demands.
Description
Technical field
The present invention relates to high-molecular coating Material Field, particularly relate to a kind of LCD mould release membrance and preparation thereof
Method.
Background technology
Along with developing rapidly of national economy, organosilicon isolating membrane is drastically being gone up at the consumption of industry-by-industry
Rise.Although the domestic manufacturer having a lot of mould release membrance, but the mould release membrance great majority produced are all low sides
Product, the index such as its cleanliness factor, planarization and antistatic does not all reach making of the industry such as electronics and cross cutting
With requiring.The demand of high-end product then can only rely on import, particularly electron trade application from
Type film, the serious development constraining China's relevant industries, the mould release membrance price of import is high, supply of material week
Phase length makes domestic user the most disturbed.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the present invention provides a kind of LCD mould release membrance and preparation side thereof
Method, it is intended to solve the indexs such as the peeling force of existing domestic mould release membrance, mist degree and remaining adhesion rate and do not reach
The problem using requirement of electron trade.
Technical scheme is as follows:
A kind of LCD mould release membrance, wherein, described LCD mould release membrance is with BOPET film as basement membrane,
A parting agent layer it is coated with in described BOPET film；Described BOPET film mist degree is not more than 1%,
Wherein, described parting agent layer, its raw material composition includes reactant monomer, initiator and toluene；
Described reactant monomer, according to mass percent, including following components:
Organosilicon performed polymer:
Organic silicon monomer 10%～30% containing vinyl；
Acrylate monomer:
Acrylic acid 30%～50%；Acrylic acid methyl ester. or methyl methacrylate 10%～25%；Acrylic acid
Ethyl ester or butyl acrylate 8%～25%；Styrene 5%～20%；Isobutyl methacrylate 4%～10%；
Described initiator includes in dilauroyl peroxide, benzoyl peroxide, cumyl peroxide
One or more, the consumption of initiator is 1.0wt%～2.5wt% of reactant monomer quality.
Described LCD mould release membrance, wherein, described parting agent layer, its raw material composition also includes firming agent
And retarder thinner；
Wherein, described firming agent is aziridine CX-100, and consumption accounts for the 3%～5% of acrylic acid quality；
The mass ratio of mould release and retarder thinner is 1.0:2.0～3.8；Retarder thinner includes ethylene glycol monomethyl ether
With one or both in toluene.
Described LCD mould release membrance, wherein, the retarder thinner used is ethylene glycol monomethyl ether and toluene,
Consumption mass ratio between mould release, ethylene glycol monomethyl ether and toluene is 1.0:0～0.8:2.0～3.0
Described LCD mould release membrance, wherein, described organosilicon performed polymer is vinyl triacetoxy silicon
Oxygen alkane.
The preparation method of a kind of LCD mould release membrance as above, wherein, comprises the following steps:
The initiator of whole organosilicon performed polymers, the toluene of part and part is joined in reactor；
Acrylic ester monomer, remaining initiator and toluene mix homogeneously are made and added liquid；
Reactor starts stirring and heats, and when being heated to 85 DEG C ± 2 DEG C, the most at the uniform velocity drips institute
Stating and add liquid, time for adding controls 2～4h；It is warming up to 92 DEG C ± 2 DEG C after completion of dropwise addition, is incubated 3～4h,
After to be triggered dose is exhausted, cooling, discharging, obtain described mould release；
Described mould release is coated in described BOPET film.
The preparation method of described LCD mould release membrance, wherein, coats described by described mould release
Process in BOPET film specifically includes following steps:
Mould release and the retarder thinner of gained are blended, are proportionally added into firming agent simultaneously, be diluted to be coated with
Cloth liquid, uses reticulate pattern formula coating machine to be coated uniformly in BOPET film, dries；
Described firming agent is aziridine CX-100, and consumption accounts for the 3%～5% of acrylic acid quality；
The mass ratio of mould release and retarder thinner is 1.0:2.0～3.8；Retarder thinner includes ethylene glycol monomethyl ether
With one or both in toluene.
The preparation method of described LCD mould release membrance, wherein, the retarder thinner used is ethylene glycol first
Ether and toluene；Consumption mass ratio 1.0:0～0.8:2.0～3.0 between mould release, ethylene glycol monomethyl ether and toluene.
Beneficial effect: LCD mould release membrance provided by the present invention, is with BOPET film as basement membrane,
Being coated with mould release in BOPET film, described mould release is acrylate modified organic containing vinyl
Silicones.LCD mould release membrance of the present invention has higher surface tension, and peeling force is moderate, remaining adhesion
The advantages such as rate is excellent.And, by the measurement to LCD mould release membrance mist degree, fully meet LCD
Demand.
Detailed description of the invention
The present invention provides a kind of LCD mould release membrance and preparation method thereof, for making the purpose of the present invention, technology
Scheme and effect are clearer, clear and definite, and the present invention is described in more detail below.Should be appreciated that
Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
LCD mould release membrance provided by the present invention, is with BOPET film as basement membrane, described BOPET
A parting agent layer it is coated with on thin film.Described BOPET film mist degree is not more than 1%.
Wherein, described parting agent layer, its raw material composition includes reactant monomer, initiator and toluene；
Described reactant monomer, according to mass percent, including following components:
Organosilicon performed polymer:
Organic silicon monomer 10%～30% containing vinyl；
Acrylate monomer:
Acrylic acid 30%～50%；Acrylic acid methyl ester. or methyl methacrylate 10%～25%；Acrylic acid
Ethyl ester or butyl acrylate 8%～25%；Styrene 5%～20%；Isobutyl methacrylate 4%～10%；
Described initiator includes dilauroyl peroxide, benzoyl peroxide, cumyl peroxide etc.
Planting or several, the consumption of initiator is about 1.0wt%～2.5wt% of reactant monomer quality；
Described mould release employs the organosilicon preformed polymer with vinyl in building-up process, can be direct
By the method for radical polymerization with acrylic ester monomer copolymerization；And the Self-emulsifying properties of organosilicon,
In non-polar solven system, silicone segments easily crimps, and defines emulsion particle.Preferably,
Have employed vinyl triacetoxy siloxanes in the present invention, solid content is 30wt%.
The amount ranges of described toluene is 1.5 to 2.0 times of reactant monomer quality.The effect of toluene
It is solvent, makes the solid content of reaction monomers be maintained at 20-40% when reaction.
Described parting agent layer, its raw material composition also includes firming agent and retarder thinner；
Wherein, described firming agent is aziridine CX-100, and consumption accounts for the 3%～5% of acrylic acid quality.
In mould release, add firming agent aziridine, curing reaction occurs after film, makes film be internally formed netted
Cross-linked structure, thus improve the combination property of film, while improving peel strength and solvent resistance
After also inhibits film forming, organosilicon preformed polymer molecule is to the migration on surface.
The mass ratio of mould release and retarder thinner is 1.0:2.0～3.8.The retarder thinner used includes second
One or both in glycol methyl ether and toluene.The retarder thinner used is ethylene glycol monomethyl ether and toluene
Two kinds, specifically, each constituent mass ratio is mould release: ethylene glycol monomethyl ether: toluene
1.0:0～0.8:2.0～3.0.
LCD mould release membrance provided by the present invention, is with BOPET film as basement membrane, BOPET film
Have heat-resist, the advantages such as mechanical strength is high, profile pattern is good.And described mould release uses third
The ester modified organic siliconresin of olefin(e) acid, while improving organosilyl surface tension force, also increases organosilicon pair
The adhesive force of BOPET film.By using the organic silicon monomer containing vinyl, can control organic well
Silicon ratio, makes the medium range that the peeling force of modified organic silicon mould release membrance controls；Organic with graft modification
Silicones is compared, and the existence of vinyl can increase substantially the ratio of acrylate in copolymerization product, enters
One step adds the dissolubility of organosilicon, improves the uniformity after coating.LCD provided by the present invention
The advantages such as mould release membrance, has higher surface tension, and peeling force is moderate, and remaining adhesion rate is excellent.Right
The measurement of this BOPET mould release membrance mist degree, fully meets the demand of LCD.
The present invention also provides for the preparation method of described LCD mould release membrance, specifically includes following steps:
In proportion the initiator of whole organosilicon performed polymers, the toluene of part and part is joined instead
Answer in still；
Acrylic ester monomer, remaining initiator and toluene mix homogeneously are made and adds liquid, store
Standby；
Start stirring, during reacting by heating still to 85 DEG C ± 2 DEG C, liquid will be added and at the uniform velocity added by dropping tank
Reactor, time for adding controls 2～4h, is warming up to 92 DEG C ± 2 DEG C after completion of dropwise addition, is incubated 3～4h,
After to be triggered dose is exhausted, cooling, discharging, obtain polymer emulsion, be described mould release；
Mould release and the retarder thinner of gained are blended, are proportionally added into firming agent simultaneously, be diluted to be coated with
Cloth liquid, uses reticulate pattern formula coating machine to be coated uniformly in BOPET film, dries, obtain water white transparency
Mould release membrance.
Wherein, the initiator of described part refers to account for the 20% of formulation weight～45%；The first of described part
Benzene refers to account for the 50% of formulation weight～65%.
Oven temperature 80～160 DEG C, it is 160 DEG C that baking oven uses gradient increased temperature maximum temperature to control.Coating
Speed controlling is 60～80m/min.
Preferably, the BOPET film mist degree of selection is not more than 1%, the most first to BOPET
Thin film carries out sided corona treatment, and the surface tension after sided corona treatment is not less than 38 dyne.The most right
BOPET film carries out sided corona treatment, can improve the surface tension of BOPET film, increases release
The adhesive force of agent.
According to GB/T 25256-2010 requirement, use the method for dyne water to described LCD mould release membrance table
Surface tension measures, and the peeling force and remaining adhesion rate to described LCD mould release membrance measures,
Measurement result finds that LCD mould release membrance described in gained has higher surface tension, and peeling force is moderate, residual
The advantages such as remaining adhesion rate is excellent.Wherein, peel test force uses TESA7457 adhesive tape to enter peeling force
Row test, uses Nitto31B adhesive tape to measure remnants adhesion rate.According to GB/T 25273-2010
Requiring to measure described LCD mould release membrance mist degree, described in gained, LCD mould release membrance mist degree is the fullest
The foot demand of LCD.Below in conjunction with embodiment, the present invention is further described.
Embodiment one
By formula, organosilicon performed polymer 3.0kg, benzoyl peroxide 0.06kg, toluene 18.0kg are added
In reactor.Weigh acrylic acid 4.0kg, butyl acrylate 1.2kg, methyl methacrylate 1.0kg,
Isobutyl methacrylate 0.5kg, styrene 0.6kg, benzoyl peroxide 0.14kg, and toluene 12.0kg
It is configured to after mix homogeneously to add liquid, seals standby.
Reacting by heating still also starts stirring, and stir speed (S.S.) is 600r/min, and reacting by heating still to 85 DEG C ±
When 2 DEG C, will add liquid and at the uniform velocity add reactor by dropping tank, time for adding controls at 2h, dropping knot
It is warming up to 92 DEG C ± 2 DEG C after bundle, is incubated 4h, after to be triggered dose is exhausted, cooling, discharging,
Polymer emulsion.
Embodiment two
By formula, organosilicon performed polymer 2.5kg, benzoyl peroxide 0.06kg, and toluene 18kg are added
Enter in reactor.Weigh acrylic acid 4.0kg, acrylic acid methyl ester. 1.3kg, butyl acrylate 1.50kg,
Isobutyl methacrylate 0.6kg, styrene 0.8kg, benzoyl peroxide 0.14kg and toluene 12.0kg
It is configured to after mix homogeneously to add liquid, seals standby.
Reacting by heating still also starts stirring, and stir speed (S.S.) is 600r/min, and reacting by heating still to 85 DEG C ±
When 2 DEG C, will add liquid and at the uniform velocity add reactor by dropping tank, time for adding controls at 2h, dropping knot
It is warming up to 92 DEG C ± 2 DEG C after bundle, is incubated 4h, after to be triggered dose is exhausted, cooling, discharging,
Polymer emulsion.
Embodiment three
Weigh polymer emulsion 1.0kg in embodiment one, ethylene glycol monomethyl ether 0.2kg and toluene 3.0kg altogether
Mixed, it is simultaneously introduced firming agent 0.005kg, is diluted to coating fluid, use reticulate pattern formula coating machine uniformly to coat
In BOPET film, coating speed 65m/min, oven temperature 80 DEG C, 120 DEG C, 140 DEG C, 160 DEG C,
120 DEG C, obtain water white mould release membrance.The peeling force measuring gained is 36.3g/25mm, remaining viscous
Rate 97%, mist degree 6.2%.
Embodiment four
Weigh polymer emulsion 1.0kg in embodiment two, ethylene glycol monomethyl ether 0.2kg and toluene 3.0kg altogether
Mixed, it is simultaneously introduced firming agent 0.005kg, is diluted to coating fluid, use reticulate pattern formula coating machine uniformly to coat
In BOPET film, coating speed 65m/min, oven temperature 80 DEG C, 120 DEG C, 140 DEG C, 160 DEG C,
120 DEG C, obtain water white mould release membrance.The peeling force measuring gained is 14.2g/25mm, remaining viscous
Rate 97%, mist degree 8.5%.
In sum, described LCD mould release membrance provided by the present invention, acrylate modified by using
Organic siliconresin is as mould release, while improving organosilyl surface tension force, also increases organosilicon pair
The adhesive force of BOPET film.By using the organic silicon monomer containing vinyl, can control organic well
Silicon ratio, makes the medium range that the peeling force of modified organic silicon mould release membrance controls；Organic with graft modification
Silicones is compared, and the existence of vinyl can increase substantially the ratio of acrylate in copolymerization product, enters
One step adds the dissolubility of organosilicon, improves the uniformity after coating.LCD of the present invention is release
The advantages such as film, has higher surface tension, and peeling force is moderate, and remaining adhesion rate is excellent.To this institute
State the measurement of LCD mould release membrance mist degree, fully meet the demand of LCD.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, to ordinary skill
For personnel, can be improved according to the above description or convert, all these modifications and variations are all answered
Belong to the protection domain of claims of the present invention.
Claims (4)
1. a LCD mould release membrance, it is characterised in that described LCD mould release membrance is with BOPET film as basement membrane, and described BOPET film is coated with a parting agent layer；Described BOPET film mist degree is not more than 1%；
Wherein, described parting agent layer, its raw material composition includes reactant monomer, initiator and toluene；
Described reactant monomer, according to mass percent, including following components:
Organosilicon performed polymer:
Organic silicon monomer 10%～30% containing vinyl；
Acrylate monomer:
Acrylic acid 30%～50%；Acrylic acid methyl ester. or methyl methacrylate 10%～25%；Ethyl acrylate or butyl acrylate 8%～25%；Styrene 5%～20%；Isobutyl methacrylate 4%～10%；
Described initiator includes one or more in dilauroyl peroxide, benzoyl peroxide, cumyl peroxide, and the consumption of initiator is 1.0wt%～2.5wt% of reactant monomer quality；
Described parting agent layer, its raw material composition also includes firming agent and retarder thinner；
Wherein, described firming agent is aziridine CX-100, and consumption accounts for the 3%～5% of acrylic acid quality；
The mass ratio of mould release and retarder thinner is 1.0:2.0～3.8；
The retarder thinner used is ethylene glycol monomethyl ether and toluene, and the consumption mass ratio between mould release, ethylene glycol monomethyl ether and toluene is 1.0:0～0.8:2.0～3.0；
Described organosilicon performed polymer is vinyl triacetoxy siloxanes.
2. the preparation method of a LCD mould release membrance as claimed in claim 1, it is characterised in that comprise the following steps:
The initiator of whole organosilicon performed polymers, the toluene of part and part is joined in reactor；
Acrylic ester monomer, remaining initiator and toluene mix homogeneously are made and added liquid；
Reactor starts stirring and heats, and when being heated to 85 ± 2 DEG C, the most at the uniform velocity adds liquid described in dropping, and time for adding controls 2～4h；It is warming up to 92 ± 2 DEG C after completion of dropwise addition, is incubated 3～4h, after to be triggered dose is exhausted, cooling, discharging, obtain described mould release；
Described mould release is coated in described BOPET film.
The preparation method of LCD mould release membrance the most according to claim 2, it is characterised in that the process in described BOPET film of being coated by described mould release specifically includes following steps:
Mould release and the retarder thinner of gained are blended, are proportionally added into firming agent simultaneously, be diluted to coating fluid, use reticulate pattern formula coating machine to be coated uniformly in BOPET film, dry；
Described firming agent is aziridine CX-100, and consumption accounts for the 3%～5% of acrylic acid quality；
The mass ratio of mould release and retarder thinner is 1.0:2.0～3.8；Retarder thinner includes one or both in ethylene glycol monomethyl ether and toluene.
The preparation method of LCD mould release membrance the most according to claim 3, it is characterised in that the retarder thinner used is ethylene glycol monomethyl ether and toluene；Consumption mass ratio 1.0:0～0.8:2.0～3.0 between mould release, ethylene glycol monomethyl ether and toluene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735004.4A CN104530996B (en) | 2014-12-05 | 2014-12-05 | LCD release film and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735004.4A CN104530996B (en) | 2014-12-05 | 2014-12-05 | LCD release film and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104530996A CN104530996A (en) | 2015-04-22 |
| CN104530996B true CN104530996B (en) | 2017-01-11 |
Family
ID=52846639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410735004.4A Active CN104530996B (en) | 2014-12-05 | 2014-12-05 | LCD release film and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104530996B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106220881A (en) * | 2016-08-11 | 2016-12-14 | 苏州柯创电子材料有限公司 | Modified organic silicon mould release membrance |
| CN109280449B (en) * | 2017-07-19 | 2020-10-30 | 天津市利好卫生材料有限公司 | Silicon-coated release film |
| CN109705768A (en) * | 2018-11-29 | 2019-05-03 | 安徽荣泽科技有限公司 | A kind of pet release film manufacture craft |
| CN112759779A (en) * | 2020-12-30 | 2021-05-07 | 南京科悦新材料有限公司 | Super-flexible release film and preparation method thereof |
| CN113185741A (en) * | 2021-05-06 | 2021-07-30 | 吉翔宝（太仓）离型材料科技发展有限公司 | Acrylic acid modified organic silicon coated release film and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759137A (en) * | 2003-03-11 | 2006-04-12 | 三菱聚酯薄膜公司 | Biaxially oriented polyester film and release film |
| CN102816538A (en) * | 2012-08-03 | 2012-12-12 | 深圳市摩码科技有限公司 | Heavy-release force release film having surface microviscosity and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218874A (en) * | 2011-03-24 | 2011-10-19 | 哈尔滨工业大学 | Modified no-rainbow organic silicon release film taking biaxially oriented poly benzoic acid gylcol ester film and preparation method thereof |
-
2014
- 2014-12-05 CN CN201410735004.4A patent/CN104530996B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759137A (en) * | 2003-03-11 | 2006-04-12 | 三菱聚酯薄膜公司 | Biaxially oriented polyester film and release film |
| CN102816538A (en) * | 2012-08-03 | 2012-12-12 | 深圳市摩码科技有限公司 | Heavy-release force release film having surface microviscosity and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104530996A (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104530996B (en) | LCD release film and production method thereof | |
| CN104497332B (en) | A kind of mould release membrance and preparation method thereof | |
| CN104530875B (en) | Release agent and preparation method thereof | |
| CN102504733B (en) | Water-blush-resistant fluoride and siloxane modified waterborne pressure-sensitive adhesive and polyethylene protective film | |
| CN104422979B (en) | Polarizing coating, laminated body and image display device with transparent conductive film adhesive phase | |
| CN107075341B (en) | Stripping film is with re-releasing additive and stripping film organopolysiloxane composition and stripping film | |
| KR101613331B1 (en) | Transferable curable non-liquid film on a release substrate | |
| CN103214684B (en) | Crosslinking agent-accelerator system for polyacrylate | |
| CN104592848B (en) | BOPET release film and preparation method thereof | |
| CN101798776B (en) | Water-based paper polishing oil and preparation method thereof | |
| KR20130031216A (en) | Removable pressure-sensitive adhesive composition, removable pressure-sensitive adhesive layer, and removable pressure-sensitive adhesive sheet | |
| JP2014141647A (en) | Aqueous dispersion type adhesive composition for transparent conductive layer, adhesive layer for transparent conductive layer, optical film with adhesive layer, and liquid crystal display device | |
| CN105713540A (en) | Preparation method of ultralight strippable self-exhausting acrylate pressure-sensitive coating material | |
| CN106008792A (en) | Solvent type acrylate pressure-sensitive adhesive preparation method | |
| CN106256840A (en) | Adhesive composition | |
| TWI502038B (en) | Adhesive layer for optical film, adhesive type optical film, manufacturing method thereof, and image display device | |
| JP6426958B2 (en) | Acrylic resin dispersion | |
| Fang et al. | Modification research on the peel strength of the acrylate emulsion pressure‐sensitive adhesives | |
| CN104974310B (en) | A kind of Decal peelable film oil resin and preparation method thereof | |
| CN110437360A (en) | A kind of skirting, door sleeve apply mud high viscosity emulsion adhesive and preparation method thereof | |
| CN106381103B (en) | Water polyacrylic acid adhesive and preparation method thereof | |
| CN109836546A (en) | A kind of rubber modified polymers and combinations thereof | |
| CN106634724B (en) | A kind of acrylate solvent-free pressure-sensitive adhesive and preparation method thereof | |
| CN108424488A (en) | A kind of anti-pollution, water-fast silicone acrylic emulsion and preparation method thereof | |
| CN113004839B (en) | Acrylate pressure-sensitive adhesive and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: LCD release film and production method thereof Effective date of registration: 20190530 Granted publication date: 20170111 Pledgee: Guangdong Nanhai rural commercial bank Limited by Share Ltd Ping Chau Branch Pledgor: Foshan Nanhai Gotop Packaging Material Co., Ltd. Registration number: 2019990000489 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |