CN107245304A - A kind of OCA optical adhesive films and its manufacturing process - Google Patents
A kind of OCA optical adhesive films and its manufacturing process Download PDFInfo
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- CN107245304A CN107245304A CN201710595540.2A CN201710595540A CN107245304A CN 107245304 A CN107245304 A CN 107245304A CN 201710595540 A CN201710595540 A CN 201710595540A CN 107245304 A CN107245304 A CN 107245304A
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- Prior art keywords
- layer
- solidification
- glue
- ebonite
- flexible glue
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to adhesive material field, more particularly to a kind of OCA optical adhesive films and its manufacturing process.The OCA optical adhesive films that the present invention is provided include the first release film layer, flexible glue layer, the first ebonite layer and the second release film layer contacted successively, or including the first release film layer contacted successively, the second ebonite layer, flexible glue layer, the first ebonite layer and the second release film layer；The shore hardness of flexible glue layer is 5~50A, and thickness is 50~200 μm；The shore hardness of first and second ebonites layer is 15~50D, and thickness is 50~150 μm.Sandwich construction of the invention by the way that the glue-line of OCA optical adhesive films to be designed to different hardness, makes OCA optical adhesive films have suitable consistency and elasticity, so that it shows good fillibility.The glue-line for being additionally, since the OCA optical adhesive films that the present invention is provided is sandwich construction, and each layer of glue-line is all relatively thin, so as to reduce the solidification difficulty of glue-line when glued membrane is produced.
Description
Technical field
The invention belongs to adhesive material field, more particularly to a kind of OCA optical adhesive films and its manufacturing process.
Background technology
OCA (Optical Clear Adhesive) optical adhesive film be by OCA optical cements it is cured be made it is double without base-material
Face glue band, with water white transparency, light transmission rate is high, adhesive strength is high the features such as.OCA optical adhesive films can according to thickness difference
Applied to different fields, it is mainly used in mobile phone screen, for bonding ito thin film and ito thin film and plastics inscription plate.
Existing OCA optical adhesive films typically only have CA optical cement layers one layer thicker, because structural adhesive layer is single, cause
Existing OCA optical adhesive films generally existing the problem of fillibility is poor.Further, since bondline thickness is larger, in production often
In the presence of incomplete problem is solidified, cause product excessive glue, cull during cross cutting, seriously constrain the life of OCA optical cements
Produce yield and use yield.
The content of the invention
In view of this, it is an object of the invention to provide a kind of OCA optical adhesive films and its manufacturing process, what the present invention was provided
OCA optical adhesive films have good fillibility, while glued membrane glue-line in production is easy to solidification.
The invention provides a kind of OCA optical adhesive films, including the first release film layer, flexible glue layer, first hard contacted successively
Glue-line and the second release film layer；
The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μm；
The shore hardness of the first ebonite layer is 15~50D, and thickness is 50~150 μm.
It is preferred that, flexible glue layer by flexible glue layer glue is coated and solidification after formed；The flexible glue layer glue includes third
Olefin(e) acid resinoid and solvent, the acrylic resin include polyurethane acrylic resin and/or polyester acrylate resin.
It is preferred that, first ebonite layer by the first ebonite layer glue is coated and solidification after formed；First ebonite
Layer glue includes modified polymethyl acid resin and/or epoxy polyester.
It is preferred that, it is additionally provided with the second ebonite layer between the first release film layer and the flexible glue layer；The second ebonite layer
Shore hardness be 15~50D, thickness be 50~150 μm.
It is preferred that, second ebonite layer by the second ebonite layer glue is coated and solidification after formed；Second ebonite
Layer glue includes modified polymethyl acid resin and/or epoxy polyester.
The invention provides a kind of manufacturing process of OCA optical adhesive films, comprise the following steps：
A1 flexible glue layer glue), is coated with the first release film layer, heat cure, low pressure mercury lamp irradiation are then carried out successively admittedly
Change, high voltage mercury lamp radiation solidification and metal halogen light irradiation solidify, and form flexible glue layer；The shore hardness of flexible glue layer for 5~
50A, thickness is 50~200 μm；
The first ebonite layer glue is coated with the second release film layer, low pressure mercury lamp irradiation solidification, high pressure are then carried out successively
Hg lamp irradiation solidifies and the solidification of metal halogen light irradiation, forms the first ebonite layer；The shore hardness of the first ebonite layer is 15
~50D, thickness is 50~150 μm；
B1 it is), that flexible glue layer and the layer progress of the first ebonite is laminating, obtain OCA optical adhesive films；The OCA optical adhesive films include
The first release film layer, flexible glue layer, the first ebonite layer and the second release film layer contacted successively.
The invention provides a kind of manufacturing process of OCA optical adhesive films, comprise the following steps：
A2), flexible glue layer glue it is coated after carry out successively heat cure, low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation it is solid
Change and the solidification of metal halogen light irradiation, form flexible glue layer；The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μ
m；
The second ebonite layer glue is coated with the first release film layer, low pressure mercury lamp irradiation solidification, high pressure are then carried out successively
Hg lamp irradiation solidifies and the solidification of metal halogen light irradiation, forms the second ebonite layer；The shore hardness of the second ebonite layer is 15
~50D, thickness is 50~150 μm；
The first ebonite layer glue is coated with the second release film layer, low pressure mercury lamp irradiation solidification, high pressure are then carried out successively
Hg lamp irradiation solidifies and the solidification of metal halogen light irradiation, forms the first ebonite layer；The shore hardness of the first ebonite layer is 15
~50D, thickness is 50~150 μm；
B2 it is), that flexible glue layer, the first ebonite layer and the layer progress of the second ebonite is laminating, obtain OCA optical adhesive films；The OCA light
Learn the first release film layer, the second ebonite layer, flexible glue layer, the first ebonite layer and the second release film layer that glued membrane includes contacting successively.
It is preferred that, the temperature that the flexible glue layer glue carries out heat cure is 50~200 DEG C, and the time is 1~3min；
The dominant wavelength that flexible glue layer glue carries out low pressure mercury lamp irradiation solidification is 240~260nm, solidification energy is 60~
200mJ/cm2；
The dominant wavelength that the flexible glue layer glue carries out high voltage mercury lamp radiation solidification is 360~370nm, and solidification energy is 200
~2000mJ/cm2；
The dominant wavelength that the flexible glue layer glue carries out metal halogen light irradiation solidification is 380~420nm, and solidification energy is
200~2000mJ/cm2。
It is preferred that, the dominant wavelength that the first ebonite layer glue carries out low pressure mercury lamp irradiation solidification is 240~260nm, Gu
Change energy is 60~200mJ/cm2；
The dominant wavelength that the first ebonite layer glue carries out high voltage mercury lamp radiation solidification is 360~370nm, and solidification energy is
200~2000mJ/cm2；
The dominant wavelength that the first ebonite layer glue carries out metal halogen light irradiation solidification is 380~420nm, solidification energy
For 200~2000mJ/cm2。
It is preferred that, the dominant wavelength that the second ebonite layer glue carries out low pressure mercury lamp irradiation solidification is 240~260nm, Gu
Change energy is 60~200mJ/cm2；
The dominant wavelength that the second ebonite layer glue carries out high voltage mercury lamp radiation solidification is 360~370nm, and solidification energy is
200~2000mJ/cm2；
The dominant wavelength that the second ebonite layer glue carries out metal halogen light irradiation solidification is 380~420nm, solidification energy
For 200~2000mJ/cm2。
Compared with prior art, the invention provides a kind of OCA optical adhesive films.The OCA optical adhesive film bags that the present invention is provided
Include the first release film layer contacted successively, flexible glue layer, the first ebonite layer and the second release film layer, or including contact successively first
Release film layer, the second ebonite layer, flexible glue layer, the first ebonite layer and the second release film layer；The shore hardness of flexible glue layer is 5~50A,
Thickness is 50~200 μm；The shore hardness of first and second ebonites layer is 15~50D, and thickness is 50~150 μm.This hair
The bright sandwich construction by the way that the glue-line of OCA optical adhesive films to be designed to different hardness, makes OCA optical adhesive films have suitable hardness
And elasticity, so that it shows good fillibility.It is many to be additionally, since the glue-line for the OCA optical adhesive films that the present invention is provided
Rotating fields, each layer of glue-line is all relatively thin, so as to reduce the solidification difficulty of glue-line when glued membrane is produced.Present invention also offers
The manufacturing process of above-mentioned OCA optical adhesive films, comprises the following steps：A1 flexible glue layer glue), is coated with the first release film layer, so
Carry out heat cure, low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation solidification and the solidification of metal halogen light irradiation successively afterwards, formed soft
Glue-line；The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μm；Coating first is hard on the second release film layer
Glue-line glue, then carries out low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation solidification and the solidification of metal halogen light irradiation, shape successively
Into the first ebonite layer；The shore hardness of the first ebonite layer is 15~50D, and thickness is 50~150 μm；B1), by flexible glue layer and
The layer progress of first ebonite is laminating, obtains OCA optical adhesive films；The OCA optical adhesive films include contact successively the first release film layer,
Flexible glue layer, the first ebonite layer and the second release film layer.In the manufacturing process that the present invention is provided, each glue-line is by glue through specific group
Formed after closing curing process solidification, the curing process that the present invention is used has good solidification effect for glue, ensure that
Glue curing is complete, it is to avoid the problems such as glued membrane goes excessive glue, cull occur in die cutting process after.Test result indicates that：The present invention
The OCA optical adhesive films of offer can fill thickness >=20 μm of ink, and fillibility is good；And hole position not excessive glue is die cut, illustrate it
Curable adhesive layer is complete.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is double colloidal layers OCA optical adhesive film structural representations provided in an embodiment of the present invention；
Fig. 2 is three glue-lines OCA optical adhesive film structural representations provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The invention provides a kind of OCA optical adhesive films, including the first release film layer, flexible glue layer, first hard contacted successively
Glue-line and the second release film layer；
The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μm；
The shore hardness of the first ebonite layer is 15~50D, and thickness is 50~150 μm.
Referring to Fig. 1, Fig. 1 is double colloidal layers OCA optical adhesive film structural representations provided in an embodiment of the present invention.In the present invention
In, the OCA optical adhesive films include the first release film layer, flexible glue layer, the first ebonite layer and the second release film layer contacted successively.
Wherein, the first release film layer and the second release film layer are temporary protective material, and flexible glue layer and the first ebonite layer composition use layer.
In the present invention, first release film layer is preferably attached most importance to release film layer；The peeling force of the heavy release film layer is excellent
Elect 30~80gf/25mm, more preferably 40~50gf/25mm as.In the present invention, the thickness of first release film layer is preferred
For 25~100 μm, more preferably 75~100 μm.
In the present invention, flexible glue layer preferably by flexible glue layer glue is coated and solidification after formed.Wherein, the flexible glue
Layer glue includes acrylic resin and solvent；The acrylic resin includes polyurethane acrylic resin and/or polyester third
Olefin(e) acid resin；Solid content in flexible glue layer glue preferably >=20wt%, more preferably 40~60wt%.In present invention offer
One embodiment in, flexible glue layer glue uses the OCA-6A glue that Kang Libang Co., Ltds of Shenzhen provide.
In the present invention, the mode of the flexible glue layer glue application is preferably the coating of slit extruded type.In the present invention, institute
State flexible glue layer glue it is coated after preferably solidified in such a way：Flexible glue layer glue after coating carries out thermosetting successively
After change, low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation solidification and the solidification of metal halogen light irradiation, formation flexible glue layer.Wherein, institute
The temperature for stating heat cure is preferably 50~200 DEG C, concretely 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, 110 DEG C,
120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 180 DEG C, 190 DEG C or 200 DEG C；The time of the heat cure is preferably
1~3min, specially 1min, 1.5min, 2min, 2.5min or 3min.In the present invention, the low pressure mercury lamp irradiation solidifies
Dominant wavelength is preferably 240~260nm, concretely 245nm, 250nm, 253.7nm or 255nm；The low pressure mercury lamp irradiation is solid
The solidification energy of change is preferably 60~200mJ/cm2, concretely 60mJ/cm2、70mJ/cm2、80mJ/cm2、90mJ/cm2、
100mJ/cm2、110mJ/cm2、120mJ/cm2、130mJ/cm2、140mJ/cm2、150mJ/cm2、160mJ/cm2、170mJ/cm2、
180mJ/cm2、190mJ/cm2Or 200mJ/cm2；The low pressure mercury lamp is preferably irradiated on the upside of glue application face to glue
Solidification.In the present invention, low pressure mercury lamp irradiation cure stage is also known as UV precuring section.In the present invention, the high-pressure sodium lamp
The dominant wavelength of irradiation solidification is preferably 360~370nm, concretely 365nm；The solidification energy of the high voltage mercury lamp radiation solidification
Preferably 200~2000mJ/cm2, concretely 200mJ/cm2、300mJ/cm2、400mJ/cm2、500mJ/cm2、600mJ/
cm2、700mJ/cm2、800mJ/cm2、900mJ/cm2、1000mJ/cm2、1100mJ/cm2、1200mJ/cm2、1300mJ/cm2、
1400mJ/cm2、1500mJ/cm2、1600mJ/cm2、1700mJ/cm2、1800mJ/cm2、1900mJ/cm2Or 2000mJ/cm2；
The high-pressure sodium lamp is preferably irradiated solidification on the upside of glue application face to glue.In the present invention, the metal halid lamp
The dominant wavelength of irradiation solidification is preferably 380~420nm, concretely 380nm, 403nm, 407nm or 417nm；The metal halogen
The solidification energy of plain light irradiation solidification is preferably 200~2000mJ/cm2, concretely 200mJ/cm2、300mJ/cm2、400mJ/
cm2、500mJ/cm2、600mJ/cm2、700mJ/cm2、800mJ/cm2、900mJ/cm2、1000mJ/cm2、1100mJ/cm2、
1200mJ/cm2、1300mJ/cm2、1400mJ/cm2、1500mJ/cm2、1600mJ/cm2、1700mJ/cm2、1800mJ/cm2、
1900mJ/cm2Or 2000mJ/cm2；The metal halid lamp is preferably irradiated solidification on the downside of glue application face to glue.
In the present invention, high voltage mercury lamp radiation solidification and metal halogen light irradiation cure stage are also known as the main solidification sections of UV.
In the present invention, the shore hardness of flexible glue layer is 5~50A, concretely 5A, 10A, 15A, 20A, 25A,
30A, 35A, 40A, 45A or 50A；The peeling force of the flexible glue layer is preferably 1000~3000gf/25mm, concretely
1000gf/25mm, 1500gf/25mm, 2000gf/25mm, 2500gf/25mm or 3000gf/25mm；The printing opacity of the flexible glue layer
The preferred ＞ 98% of rate；The preferred ＜ 1% of mist degree of the flexible glue layer；The thickness of the flexible glue layer is 50~200 μm, preferably 100
~150 μm.
In the present invention, first ebonite layer by the first ebonite layer glue is coated and solidification after formed；Described first
Ebonite layer glue includes modified polymethyl acid resin and/or epoxy polyester；The viscosity of the first ebonite layer glue is preferred
For 800~1200cps (25 DEG C), concretely 1000cps (25 DEG C)；The refractive index of first ebonite layer glue is preferably
1.4~1.5, concretely 1.48.In one embodiment that the present invention is provided, the first ebonite layer glue uses Zhangjiagang
The LOCA-ATL06A that Kang get Xin photoelectric materials Co., Ltd provides.In the present invention, the side of the first ebonite layer glue application
Formula is preferably the coating of slit extruded type.In the present invention, after the first ebonite layer glue is coated preferably in such a way
Solidified：The first ebonite layer glue after coating carries out low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation solidification and gold successively
Belong to after the solidification of halogen light irradiation, form the first ebonite layer.Wherein, the dominant wavelength of the low pressure mercury lamp irradiation solidification is preferably 240
~260nm, concretely 245nm, 250nm, 253.7nm or 255nm；The solidification energy of the low pressure mercury lamp irradiation solidification is preferred
For 60~200mJ/cm2, concretely 60mJ/cm2、70mJ/cm2、80mJ/cm2、90mJ/cm2、100mJ/cm2、110mJ/
cm2、120mJ/cm2、130mJ/cm2、140mJ/cm2、150mJ/cm2、160mJ/cm2、170mJ/cm2、180mJ/cm2、190mJ/
cm2Or 200mJ/cm2；The low pressure mercury lamp is preferably irradiated solidification on the upside of glue application face to glue.In the present invention,
The dominant wavelength of the high voltage mercury lamp radiation solidification is preferably 360~370nm, concretely 365nm；The high voltage mercury lamp radiation is consolidated
The solidification energy of change is preferably 200~2000mJ/cm2, concretely 200mJ/cm2、300mJ/cm2、400mJ/cm2、500mJ/
cm2、600mJ/cm2、700mJ/cm2、800mJ/cm2、900mJ/cm2、1000mJ/cm2、1100mJ/cm2、1200mJ/cm2、
1300mJ/cm2、1400mJ/cm2、1500mJ/cm2、1600mJ/cm2、1700mJ/cm2、1800mJ/cm2、1900mJ/cm2Or
2000mJ/cm2；The high-pressure sodium lamp is preferably irradiated solidification on the upside of glue application face to glue.In the present invention, it is described
The dominant wavelength of metal halogen light irradiation solidification is preferably 380~420nm, concretely 380nm, 403nm, 407nm or 417nm；
The solidification energy of the metal halogen light irradiation solidification is preferably 200~2000mJ/cm2, concretely 200mJ/cm2、300mJ/
cm2、400mJ/cm2、500mJ/cm2、600mJ/cm2、700mJ/cm2、800mJ/cm2、900mJ/cm2、1000mJ/cm2、
1100mJ/cm2、1200mJ/cm2、1300mJ/cm2、1400mJ/cm2、1500mJ/cm2、1600mJ/cm2、1700mJ/cm2、
1800mJ/cm2、1900mJ/cm2Or 2000mJ/cm2；The metal halid lamp is carried out preferably on the downside of glue application face to glue
Irradiation solidification.
In the present invention, the shore hardness of first ebonite layer is 15~50D, concretely 15D, 20D, 25D, 30D,
35D, 40D, 45D or 50D；The peeling force of the first ebonite layer is preferably 1000~2000gf/25mm, concretely
1000gf/25mm, 1500gf/25mm or 2000gf/25mm；The preferred ＞ 98% of light transmittance of the first ebonite layer；Described
The preferred ＜ 1% of mist degree of one ebonite layer；The thickness of first ebonite layer is 50~150 μm, preferably 50~100 μm, specifically
It can be 50 μm or 75 μm.
In the present invention, second release film layer is preferably light release film layer；The peeling force of the light release film layer is excellent
Elect 3~20gf/25mm, more preferably 5~15gf/25mm as, concretely 5gf/25mm, 6gf/25mm, 7gf/25mm, 8gf/
25mm, 9gf/25mm, 10gf/25mm, 11gf/25mm, 12gf/25mm, 13gf/25mm, 14gf/25mm or 15gf/25mm.
In the present invention, the thickness of second release film layer is preferably 25~100 μm, more preferably 25~50 μm.
In the present invention, it is additionally provided with the second ebonite between the first release film layer of the OCA optical adhesive films and flexible glue layer
Layer, as shown in Fig. 2 Fig. 2 is three glue-lines OCA optical adhesive film structural representations provided in an embodiment of the present invention.In the present invention, institute
State the second ebonite layer by the second ebonite layer glue it is coated and solidification after formed.Wherein, the second ebonite layer glue composition, painting
Mode for cloth and curing mode can refer to the first ebonite layer, will not be repeated here.In the present invention, the shore hardness of the second ebonite layer
For 15~50D, concretely 15D, 20D, 25D, 30D, 35D, 40D, 45D or 50D；The peeling force of the second ebonite layer is preferred
For 1000~2000gf/25mm, concretely 1000gf/25mm, 1500gf/25mm or 2000gf/25mm；Second ebonite
The preferred ＞ 98% of light transmittance of layer；The preferred ＜ 1% of mist degree of the second ebonite layer；The thickness of second ebonite layer for 50~
150 μm, preferably 50~100 μm, concretely 50 μm or 75 μm.
The invention provides a kind of manufacturing process of the double colloidal layers OCA optical adhesive films of structure as shown in Figure 1, including following step
Suddenly：
A1 flexible glue layer glue), is coated with the first release film layer, heat cure, low pressure mercury lamp irradiation are then carried out successively admittedly
Change, high voltage mercury lamp radiation solidification and metal halogen light irradiation solidify, and form flexible glue layer；The shore hardness of flexible glue layer for 5~
50A, thickness is 50~200 μm；
The first ebonite layer glue is coated with the second release film layer, low pressure mercury lamp irradiation solidification, high pressure are then carried out successively
Hg lamp irradiation solidifies and the solidification of metal halogen light irradiation, forms the first ebonite layer；The shore hardness of the first ebonite layer is 15
~50D, thickness is 50~150 μm；
B1 it is), that flexible glue layer and the layer progress of the first ebonite is laminating, obtain OCA optical adhesive films；The OCA optical adhesive films include
The first release film layer, flexible glue layer, the first ebonite layer and the second release film layer contacted successively.
In the above-mentioned manufacturing process that the present invention is provided, the specific optional condition of the heat cure being related to and UV solidifications is above
In by the agency of, will not be repeated here.
In actual industrial production, the double colloidal layers OCA optical adhesive films can specifically be prepared in accordance with the following methods：
1) flexible glue layer glue, is coated with the first release film layer, heat cure, low pressure mercury lamp irradiation are then carried out successively admittedly
Change, high voltage mercury lamp radiation solidification and metal halogen light irradiation solidify, and form flexible glue layer.
2), in the flexible glue layer release film layer of overlying the 3rd, winding obtains semi-finished product；Wherein, the 3rd release film layer is preferred
For light release film layer；The peeling force of 3rd release film layer is preferably 3~20gf/25mm, more preferably 5~15gf/25mm,
Concretely 5gf/25mm, 6gf/25mm, 7gf/25mm, 8gf/25mm, 9gf/25mm, 10gf/25mm, 11gf/25mm,
12gf/25mm, 13gf/25mm, 14gf/25mm or 15gf/25mm；The thickness of 3rd release film layer is preferably 25~100 μ
M, more preferably 25~50 μm.
3) the first ebonite layer glue, is coated with the second release film layer, low pressure mercury lamp irradiation solidification, height are then carried out successively
Pressure mercury lamp irradiation solidification and metal halogen light irradiation solidification, after cured with step 2) semi-finished product carry out ebonite layer, flexible glue layer
It is laminating, synchronous the 3rd release film layer for tearing semi-finished product off is needed when laminating, laminating winding obtains double colloidal layers OCA optical adhesive film products.
Present invention also offers a kind of manufacturing process of three glue-line OCA optical adhesive films of structure as shown in Figure 2, including it is following
Step：
A2), flexible glue layer glue it is coated after carry out successively heat cure, low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation it is solid
Change and the solidification of metal halogen light irradiation, form flexible glue layer；The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μ
m；
The second ebonite layer glue is coated with the first release film layer, low pressure mercury lamp irradiation solidification, high pressure are then carried out successively
Hg lamp irradiation solidifies and the solidification of metal halogen light irradiation, forms the second ebonite layer；The shore hardness of the second ebonite layer is 15
~50D, thickness is 50~150 μm；
The first ebonite layer glue is coated with the second release film layer, low pressure mercury lamp irradiation solidification, high pressure are then carried out successively
Hg lamp irradiation solidifies and the solidification of metal halogen light irradiation, forms the first ebonite layer；The shore hardness of the first ebonite layer is 15
~50D, thickness is 50~150 μm；
B2 it is), that flexible glue layer, the first ebonite layer and the layer progress of the second ebonite is laminating, obtain OCA optical adhesive films；The OCA light
Learn the first release film layer, the second ebonite layer, flexible glue layer, the first ebonite layer and the second release film layer that glued membrane includes contacting successively.
In the above-mentioned manufacturing process that the present invention is provided, the specific optional condition of the heat cure being related to and UV solidifications is above
In by the agency of, will not be repeated here.
In actual industrial production, the three glue-lines OCA optical adhesive films can specifically be prepared in accordance with the following methods：
1) flexible glue layer glue, is coated with the 4th release film layer, heat cure, low pressure mercury lamp irradiation are then carried out successively admittedly
Change, high voltage mercury lamp radiation solidification and metal halogen light irradiation solidify, and form flexible glue layer；Wherein, the 4th release film layer is preferred
For middle release film layer, the peeling force of the middle release film layer is more than light release film layer and less than weight release film layer；Described 4th from
The peeling force of type film layer is preferably 10~25gf/25mm, more preferably 15~20gf/25mm；The thickness of 4th release film layer
Degree is preferably 30~100 μm, more preferably 40~50 μm.
2), in the flexible glue layer release film layer of overlying the 3rd, winding obtains the first semi-finished product；Wherein, the 3rd release film layer
Hereinbefore by the agency of, will not be repeated here.
3) the second ebonite layer glue, is coated with the first release film layer, low pressure mercury lamp irradiation solidification, height are then carried out successively
Pressure mercury lamp irradiation solidification and metal halogen light irradiation solidification, after cured with step 2) semi-finished product carry out ebonite layer, flexible glue layer
It is laminating, synchronous the 3rd release film layer for tearing semi-finished product off is needed when laminating, laminating winding obtains the second semi-finished product.
4) the first ebonite layer glue, is coated with the second release film layer, low pressure mercury lamp irradiation solidification, height are then carried out successively
Pressure mercury lamp irradiation solidification and metal halogen light irradiation solidification, after cured with step 3) the second semi-finished product carry out ebonite layer, it is soft
Glue-line is laminating, and synchronous the 4th release film layer for tearing the second semi-finished product off is needed when laminating, and laminating winding obtains three glue-line OCA optical cements
Film product.
Sandwich construction of the invention by the way that the glue-line of OCA optical adhesive films to be designed to different hardness, has OCA optical adhesive films
There is suitable consistency and elasticity, so that it shows good fillibility.It is additionally, since the OCA optical cements that the present invention is provided
The glue-line of film is sandwich construction, and each layer of glue-line is all relatively thin, so as to reduce the solidification difficulty of glue-line when glued membrane is produced.
In the optimal technical scheme that the present invention is provided, each glue-line is formed after the combined curing process solidification of glue, this
The curing process that invention is used has good solidification effect for glue, ensure that glue curing is complete, it is to avoid glued membrane exists
After the problems such as go in die cutting process excessive glue, cull occur, improve product yield.
In the optimal technical scheme that provides of the present invention, by the UV main solidification section stages to high-pressure sodium lamp and metal halogen
The irradiation position of lamp is defined, so as to further improve the solidification effect of glue, it is ensured that glue being capable of completion of cure.
Test result indicates that：The OCA optical adhesive films that the present invention is provided can fill thickness >=20 μm of ink, and fillibility is good
It is good；And hole position not excessive glue is die cut, illustrate that its curable adhesive layer is complete.
For the sake of becoming apparent from, it is described in detail below by following examples.
In following embodiments and comparative example, flexible glue layer glue uses Kang Libang Co., Ltds of Shenzhen OCA-6A glue, Gu
Content is 40%.First ebonite layer glue and the second ebonite layer glue use modified polymethyl acid resin, specific to use
The LOCA-ATL06A of Zhangjiagang Kangdexin Optronics Material Co., Ltd., its viscosity is 1000cps (25 DEG C), refractive index 1.48.
Embodiment 1
1) flexible glue layer glue (solid content 40wt%), is coated with mould release membrance in 50 μm, into heat cure section：In average temperature
Solvent drying and processing, time 1.5min are carried out at 130 DEG C of degree.Its coating method is coated with using slit extruded type, flexible glue layer glue
Dry thickness is 150 μm, and middle mould release membrance peeling force is 15gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
100mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 1000mJ/cm2；Metal halid lamp
Rear, on the downside of middle mould release membrance, its solidification energy is 1000mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained the first semi-finished product.Wherein, light mould release membrance peeling force is
8gf/25mm。
5) the first ebonite layer glue, is coated with 100 μm of weight mould release membrances, by UV precuring section and the main solidification section (UV of UV
Solidification process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy is
800mJ/cm2, metal halid lamp solidification energy is 800mJ/cm2), the flexible glue layer with the first semi-finished product before covers after cured
Close, the synchronous light mould release membrance for tearing the first semi-finished product off is needed when laminating, laminating winding obtains the second semi-finished product.Wherein, it is described it is heavy from
Type film peeling force is 30gf/25mm, and the first hard bondline thickness is 75 μm.
6) the second ebonite layer glue, is coated with 50 μm of light mould release membrance, by UV precuring section and the main solidification section (UV of UV
Solidification process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy is
800mJ/cm2, metal halid lamp solidification energy is 800mJ/cm2), the second semi-finished product of laminating step 5 after cured, when laminating
The synchronous middle mould release membrance for tearing the second semi-finished product off is needed, laminating winding obtains OCA optical cement products.Wherein, the second hard bondline thickness
For 75 μm, the light mould release membrance peeling force is 8gf/25mm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (100 μm)/second ebonite layer (75 μm)/
Flexible glue layer (150 μm)/first ebonite layer (75 μm)/light mould release membrance (50 μm).
Embodiment 2
1) flexible glue layer glue (solid content 40wt%), is coated with mould release membrance in 50 μm, into heat cure section：In average temperature
Solvent drying and processing, time 1min are carried out at 130 DEG C of degree.Its coating method is coated with using slit extruded type, and flexible glue layer glue is done
Thickness is 100 μm, and middle mould release membrance peeling force is 20gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
100mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 800mJ/cm2；Metal halid lamp
Rear, on the downside of middle mould release membrance, its solidification energy is 800mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained the first semi-finished product.Wherein, light mould release membrance peeling force is
8gf/25mm。
5) the first ebonite layer glue, is coated with 75 μm of weight mould release membrances, (UV is solid by UV precuring section and the main solidification sections of UV
Change process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy is
500mJ/cm2, metal halid lamp solidification energy is 500mJ/cm2), the flexible glue layer with the first semi-finished product before covers after cured
Close, the synchronous light mould release membrance for tearing the first semi-finished product off is needed when laminating, laminating winding obtains the second semi-finished product.Wherein, it is described it is heavy from
Type film peeling force is 30gf/25mm, and the first ebonite layer dry thickness is 50 μm.
6) the second ebonite layer glue, is coated with 50 μm light mould release membrance, (UV is solid by UV precuring section and the main solidification sections of UV
Change process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy is
800mJ/cm2, metal halid lamp solidification energy is 800mJ/cm2), the second semi-finished product of laminating step 5 after cured, when laminating
The synchronous middle mould release membrance for tearing the second semi-finished product off is needed, laminating winding obtains OCA optical cement products.Wherein, the second hard bondline thickness
For 50 μm, the light mould release membrance peeling force is 8gf/25mm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (75 μm)/second ebonite layer (50 μm)/
Flexible glue layer (100 μm)/first ebonite layer (50 μm)/light mould release membrance (50 μm).
Embodiment 3
1) flexible glue layer glue (solid content 40wt%), is coated with mould release membrance in 50 μm, into heat cure section：In average temperature
Solvent drying and processing, time 1min are carried out at 130 DEG C of degree.Its coating method is coated with using slit extruded type, and flexible glue layer glue is done
Thickness is 150 μm, and middle mould release membrance peeling force is 20gf/25mm.
2), UV precuring section：After heat cure, into precuring section.This section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
100mJ/cm2。
3), the main solidification sections of UV：By precuring section after, into main solidification section.This section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 1000mJ/cm2；Metal halid lamp
Rear, on the downside of middle mould release membrance, its solidification energy is 1000mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained the first semi-finished product.Wherein, light mould release membrance peeling force is
8gf/25mm。
5) the first ebonite layer glue, is coated with 75 μm of weight mould release membrances, (UV is solid by UV precuring section and the main solidification sections of UV
Change process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy is
500mJ/cm2, metal halid lamp solidification energy is 500mJ/cm2), the flexible glue layer with the first semi-finished product before covers after cured
Close, the synchronous light mould release membrance for tearing the first semi-finished product off is needed when laminating, laminating winding obtains the second semi-finished product.Wherein, it is described it is heavy from
Type film peeling force is 30gf/25mm, and the first ebonite layer dry thickness is 50 μm.
6) the second ebonite layer glue, is coated with 50 μm light mould release membrance, (UV is solid by UV precuring section and the main solidification sections of UV
Change process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy is
500mJ/cm2, metal halid lamp solidification energy is 500mJ/cm2), the second semi-finished product of laminating step 5 after cured, when laminating
The synchronous middle mould release membrance for tearing the second semi-finished product off is needed, laminating winding obtains OCA optical cement products.Wherein, the second hard bondline thickness
For 50 μm, the heavy mould release membrance peeling force is 8gf/25mm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (75 μm)/second ebonite layer (50 μm)/
Flexible glue layer (150 μm)/first ebonite layer (50 μm)/light mould release membrance (50 μm).
Embodiment 4
1), the coating flexible glue layer glue (solid content 40wt%) on 100 μm of weight mould release membrances, into heat cure section：Average
Solvent drying and processing, time 1.5min are carried out at 130 DEG C of temperature.Its coating method is coated with using slit extruded type, flexible glue layer glue
Water dry thickness is 150 μm, and weight mould release membrance peeling force is 30gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
100mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 1000mJ/cm2；Metal halid lamp
Rear, on the downside of weight mould release membrance, its solidification energy is 1000mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained semi-finished product.Wherein, light mould release membrance peeling force is 8gf/
25mm。
5) the first ebonite layer glue, is coated with another 50 μm light mould release membrance, by UV precuring section and the main solidification sections of UV
(UV solidification process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy
For 1000mJ/cm2, metal halid lamp solidification energy is 1000mJ/cm2), the flexible glue layer with semi-finished product before covers after cured
Close, the synchronous light mould release membrance for tearing semi-finished product off is needed when laminating, laminating winding obtains OCA optical cement products.Wherein, it is described light release
Film peeling force is 10gf/25mm, and the first hard bondline thickness is 100 μm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (100 μm)/flexible glue layer (150 μm)/the
One ebonite layer (100 μm)/light mould release membrance (50 μm).
Embodiment 5
1), the coating flexible glue layer glue (solid content 40wt%) on 75 μm of weight mould release membrances, into heat cure section：In average temperature
Solvent drying and processing, time 1.5min are carried out at 130 DEG C of degree.Its coating method is coated with using slit extruded type, flexible glue layer glue
Dry thickness is 125 μm, and weight mould release membrance peeling force is 40gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
100mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 900mJ/cm2；Metal halid lamp
Rear, on the downside of weight mould release membrance, its solidification energy is 900mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained semi-finished product.Wherein, light mould release membrance peeling force is
10gf/25mm。
5) the first ebonite layer glue, is coated with another 50 μm light mould release membrance, by UV precuring section and the main solidification sections of UV
(UV solidification process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy
For 500mJ/cm2, metal halid lamp solidification energy is 500mJ/cm2), the flexible glue layer with semi-finished product before is laminating after cured,
The synchronous light mould release membrance for tearing semi-finished product off is needed when laminating, laminating winding obtains OCA optical cement products.Wherein, the light mould release membrance
Peeling force is 10gf, and the first hard bondline thickness is 50 μm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (75 μm)/flexible glue layer (125 μm)/first
Ebonite layer (50 μm)/light mould release membrance (50 μm).
Embodiment 6
1), the coating flexible glue layer glue (solid content 40wt%) on 75 μm of weight mould release membrances, into heat cure section：In average temperature
Solvent drying and processing, time 1.5min are carried out at 130 DEG C of degree.Its coating method is coated with using slit extruded type, flexible glue layer glue
Dry thickness is 150 μm, and weight mould release membrance peeling force is 40gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
100mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 1000mJ/cm2；Metal halid lamp
Rear, on the downside of middle mould release membrance, its solidification energy is 1000mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained semi-finished product.Wherein, light mould release membrance peeling force is
10gf/25mm。
5th, the first ebonite layer glue is coated with another 50 μm light mould release membrance, by UV precuring section and the main solidification sections of UV
(UV solidification process is identical with step 3, and UV conditions of cure are：UV precuring section energy 100mJ/cm2, high-pressure sodium lamp solidification energy
For 500mJ/cm2, metal halid lamp solidification energy is 500mJ/cm2), the flexible glue layer with semi-finished product before is laminating after cured,
The synchronous light mould release membrance for tearing semi-finished product off is needed when laminating, laminating winding obtains OCA optical cement products.Wherein, the light mould release membrance
Peeling force is 10gf, and the first hard bondline thickness is 50 μm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (75 μm)/flexible glue layer (150 μm)/first
Ebonite layer (50 μm)/light mould release membrance (50 μm).
Comparative example 1
1), the coating flexible glue layer glue (solid content 40wt%) on 100 μm of weight mould release membrances, into heat cure section：Average
Solvent drying and processing, time 1.5min are carried out at 130 DEG C of temperature.Its coating method is coated with using slit extruded type, flexible glue layer glue
Water dry thickness is 150 μm, and weight mould release membrance peeling force is 30gf/25mm.
2), UV solidifies section：Main solidification section (no UV precuring) is directly entered, this section of cure lamp uses high-pressure sodium lamp (UVA ripples
Section ultraviolet light, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) mixing cured mode.
Wherein, high-pressure sodium lamp is preceding, and metal halid lamp is all located on the upside of weight mould release membrance, solidification energy is 1000mJ/cm rear2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained semi-finished product.Wherein, light mould release membrance peeling force is 8gf/
25mm。
5) the first ebonite layer glue, is coated with another 50 μm light mould release membrance, being directly over the main solidification sections of UV, (UV solidified
Journey is identical with step 3, and UV conditions of cure are：High-pressure sodium lamp solidification energy is 1000mJ/cm2, metal halid lamp solidification energy is
1000mJ/cm2), the flexible glue layer with semi-finished product before is laminating after cured, and the light release of synchronous removing semi-finished product is needed when laminating
Film, laminating winding obtains OCA optical cement products.Wherein, the light mould release membrance peeling force is 10gf/25mm, the first ebonite thickness
Spend for 100 μm.
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (100 μm)/flexible glue layer (150 μm)/the
One ebonite layer (100 μm)/light mould release membrance (50 μm).
Comparative example 2
1), the coating flexible glue layer glue (solid content 40wt%) on 100 μm of weight mould release membrances, into heat cure section：Average
Solvent drying and processing, time 1.5min are carried out at 130 DEG C of temperature.Its coating method is coated with using slit extruded type, flexible glue layer glue
Water dry thickness is 150 μm, and weight mould release membrance peeling force is 30gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
200mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 1500mJ/cm2；Metal halid lamp
Rear, on the downside of weight mould release membrance, its solidification energy is 2000mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained semi-finished product.Wherein, light mould release membrance peeling force is 8gf/
25mm。
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (100 μm)/flexible glue layer (250 μm)/light
Mould release membrance (50 μm).
Comparative example 3
1), the coating ebonite layer glue (solid content 100wt%) on 100 μm of weight mould release membrances, its coating method uses slit
Extruded type is coated with, and ebonite layer glue dry thickness is 250 μm, and weight mould release membrance peeling force is 30gf/25mm.
2), UV precuring section：After heat cure, into precuring section, this section of cure lamp uses low pressure mercury lamp (UVC
Wave band ultraviolet light, dominant wavelength is 253.7nm) solidified, it is desirable to fluorescent tube is arranged on the upside of glue application face, its solidification energy
200mJ/cm2。
3), the main solidification sections of UV：After precuring section, into main solidification section, this section of cure lamp uses high-pressure sodium lamp
The mixing of (UVA wave band ultraviolet lights, dominant wavelength is 365nm) and metal halid lamp (UVA wave band ultraviolet lights, dominant wavelength is 380nm) is solid
Change mode.Wherein, high-pressure sodium lamp is preceding, on the upside of glue application face, and its solidification energy is 1500mJ/cm2；Metal halid lamp
Rear, on the downside of weight mould release membrance, its solidification energy is 2000mJ/cm2。
4) 50 μm light mould release membrance, is covered with after hardening, is wound, is obtained semi-finished product.Wherein, light mould release membrance peeling force is 8gf/
25mm。
The structure of OCA optical cement products that the present embodiment is provided is：Weight mould release membrance (100 μm)/ebonite layer (250 μm)/light
Mould release membrance (50 μm).
Performance test is carried out to the OCA optical adhesive films that above-described embodiment and comparative example are provided, 1 is the results are shown in Table.Wherein, glue-line
Hardness is tested with " the LX-D shore durometer " in " Beijing epoch good enjoy science and technology limited "；Excessive glue has hole by die-cutting machine cross cutting
Position model, is die cut the big small-shape of the screens of iPhone 7 correspondence in this patent by die-cutting machine, see hole position whether excessive glue；Filling capacity
To ink segment difference filling capacity, to see whether have bubble, it is specially：Surface is scribbled to sheet material (the wherein BM ink of BM printings
Thickness and precision is 1 μm, and the rectangular region that ink is not coated onto is 4.4 cun), by the ebonite of OCA optical cements sample (4.7 cun) layer with
Scribble that BM ink OCA vacuum attaching machines are laminating, whether visual edge has bubble；Glue-line peel test force national standard is JIS
The test national standard of Z0237-2009, light transmittance and mist degree is GB/T2410-2008.
The OCA optical adhesive film performance test tables of table 1
The OCA optical adhesive film performance test table (Continued) of table 1
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of OCA optical adhesive films, including the first release film layer, flexible glue layer, the first ebonite layer and second release contacted successively
Film layer；
The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μm；
The shore hardness of the first ebonite layer is 15~50D, and thickness is 50~150 μm.
2. OCA optical adhesive films according to claim 1, it is characterised in that the flexible glue layer is coated by flexible glue layer glue
Formed with after solidification；The flexible glue layer glue includes acrylic resin and solvent, and the acrylic resin includes polyurethane
Acrylic resin and/or polyester acrylate resin.
3. OCA optical adhesive films according to claim 1, it is characterised in that the first ebonite layer is by the first ebonite layer glue
Water it is coated and solidification after formed；The first ebonite layer glue includes modified polymethyl acid resin and/or epoxy polyester.
4. the OCA optical adhesive films according to any one of claims 1 to 3, it is characterised in that first release film layer with it is soft
The second ebonite layer is additionally provided between glue-line；The shore hardness of the second ebonite layer is 15~50D, and thickness is 50~150 μm.
5. OCA optical adhesive films according to claim 4, it is characterised in that the second ebonite layer is by the second ebonite layer glue
Water it is coated and solidification after formed；The second ebonite layer glue includes modified polymethyl acid resin and/or epoxy polyester.
6. a kind of manufacturing process of OCA optical adhesive films, comprises the following steps：
A1), the coating flexible glue layer glue on the first release film layer, then carries out heat cure, low pressure mercury lamp irradiation solidification, height successively
Pressure mercury lamp irradiation solidification and the solidification of metal halogen light irradiation, form flexible glue layer；The shore hardness of the flexible glue layer is 5~50A, thick
Spend for 50~200 μm；
The first ebonite layer glue is coated with the second release film layer, low pressure mercury lamp irradiation solidification, high-pressure sodium lamp are then carried out successively
Irradiation solidification and the solidification of metal halogen light irradiation, form the first ebonite layer；The shore hardness of first ebonite layer for 15~
50D, thickness is 50~150 μm；
B1 it is), that flexible glue layer and the layer progress of the first ebonite is laminating, obtain OCA optical adhesive films；The OCA optical adhesive films are included successively
The first release film layer, flexible glue layer, the first ebonite layer and the second release film layer of contact.
7. a kind of manufacturing process of OCA optical adhesive films, comprises the following steps：
A2), flexible glue layer glue it is coated after carry out successively heat cure, low pressure mercury lamp irradiation solidification, high voltage mercury lamp radiation solidification and
Metal halogen light irradiation solidifies, and forms flexible glue layer；The shore hardness of the flexible glue layer is 5~50A, and thickness is 50~200 μm；
The second ebonite layer glue is coated with the first release film layer, low pressure mercury lamp irradiation solidification, high-pressure sodium lamp are then carried out successively
Irradiation solidification and the solidification of metal halogen light irradiation, form the second ebonite layer；The shore hardness of second ebonite layer for 15~
50D, thickness is 50~150 μm；
The first ebonite layer glue is coated with the second release film layer, low pressure mercury lamp irradiation solidification, high-pressure sodium lamp are then carried out successively
Irradiation solidification and the solidification of metal halogen light irradiation, form the first ebonite layer；The shore hardness of first ebonite layer for 15~
50D, thickness is 50~150 μm；
B2 it is), that flexible glue layer, the first ebonite layer and the layer progress of the second ebonite is laminating, obtain OCA optical adhesive films；The OCA optical cements
Film includes the first release film layer, the second ebonite layer, flexible glue layer, the first ebonite layer and the second release film layer contacted successively.
8. the manufacturing process according to claim 6 or 7, it is characterised in that the flexible glue layer glue carries out the temperature of heat cure
Spend for 50~200 DEG C, the time is 1~3min；
The dominant wavelength that flexible glue layer glue carries out low pressure mercury lamp irradiation solidification is 240~260nm, solidification energy is 60~
200mJ/cm2；
The dominant wavelength that flexible glue layer glue carries out high voltage mercury lamp radiation solidification is 360~370nm, solidification energy is 200~
2000mJ/cm2；
The dominant wavelength that flexible glue layer glue carries out metal halogen light irradiation solidification is 380~420nm, solidification energy is 200~
2000mJ/cm2。
9. the manufacturing process according to claim 6 or 7, it is characterised in that the first ebonite layer glue carries out low-pressure mercury
The dominant wavelength of light irradiation solidification is 240~260nm, and solidification energy is 60~200mJ/cm2；
The dominant wavelength that the first ebonite layer glue carries out high voltage mercury lamp radiation solidification is 360~370nm, and solidification energy is 200
~2000mJ/cm2；
The dominant wavelength that the first ebonite layer glue carries out metal halogen light irradiation solidification is 380~420nm, and solidification energy is
200~2000mJ/cm2。
10. manufacturing process according to claim 7, it is characterised in that the second ebonite layer glue carries out low pressure mercury lamp
The dominant wavelength of irradiation solidification is 240~260nm, and solidification energy is 60~200mJ/cm2；
The dominant wavelength that the second ebonite layer glue carries out high voltage mercury lamp radiation solidification is 360~370nm, and solidification energy is 200
~2000mJ/cm2；
The dominant wavelength that the second ebonite layer glue carries out metal halogen light irradiation solidification is 380~420nm, and solidification energy is
200~2000mJ/cm2。
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| CN114686128A (en) * | 2020-12-31 | 2022-07-01 | 太湖金张科技股份有限公司 | OCA optical adhesive tape and processing technology thereof |
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