CN107187128B - A kind of curved surface protective film and its laminating method of coating and forming method - Google Patents
A kind of curved surface protective film and its laminating method of coating and forming method Download PDFInfo
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- CN107187128B CN107187128B CN201710297720.2A CN201710297720A CN107187128B CN 107187128 B CN107187128 B CN 107187128B CN 201710297720 A CN201710297720 A CN 201710297720A CN 107187128 B CN107187128 B CN 107187128B
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- 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
-
- 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
- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- 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
-
- 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
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of curved surface protective films, including the first PET release film, the first hardened layer, substrate layer, the second hardened layer, layer of silica gel and the fluoridated silicone release layer stacked gradually from top to bottom；Wherein, the first PET release film includes the release membrane body of PET, and the first glue-line below the release membrane body of PET is arranged in.The curved surface protects film hardness big, and fitting curved surface mobile phone rear stability is good, can be bonded, durable scratch resistance with curve screens perfection, provide more stable, effective and comprehensive protection for curved surface mobile phone screen；And it is easy pad pasting, experience property is good.The invention also discloses a kind of laminating methods of coating of curved surface protective film, and simple process, step is few, safe operation.The present invention discloses a kind of forming method of curved surface protective film again, and simple process, safe operation is simple, at low cost.
Description
Technical field
The present invention relates to a kind of protection technical field of membrane more particularly to a kind of curved surface protective film and its laminating method of coating and
Forming method.
Background technique
The generality of 2.5D curved surface mobile phone and 3D curved surface mobile phone is higher and higher, from the flagship machine of publication in 2015-2016
In it is found that cambered surface mobile phone occupation rate close to 90%.And it can determine whether from the data and some statistical informations increased, curved surface hand
Machine be megatrend development trend, occupation rate of market can still continue to increase.It is existing with the development that mobile phone makes rapid progress
Safeguard film for cellular phone has been increasingly difficult to meet consumer demand.In order to cater to the development of curved surface mobile phone, the protection of curved surface mobile phone
Film occurs in succession.Existing curved surface protective film mainly includes three categories: TPU+ acrylic bond paper facing, hot bending PET pad pasting, hot bending steel
Change adhering film to glass.
But above-mentioned curved surface protective film has the following deficiencies:
(1) TPU+ acrylic bond paper facing: TPU material belongs to mantle series, whole soft, not straight and upright enough, leads to the pad pasting phase
Between align inaccuracy, pad pasting gimmick is required high；Also, acrylic adhesiveness is high, poor fluidity, and when pad pasting needs by corresponding
Swipe auxiliary exhaust, affect whole pad pasting experience property；
(2) hot bending PET pad pasting: using PET for substrate, lacks the design of other hardened layers, and product surface hardness is low, whole small
In 3H, (according to JIS 5600-5-4:1999), product durability is poor for test；
(3) hot bending tempered glass pad pasting: at high cost, edge is easily broken, since glass is integrally firm, during leading to hot bending
Existing tolerance value can not be made up with corresponding glue-line, will appear no glue phenomenon in the middle part of product, influence to manipulate sensitivity.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of curved surface protective film, the curved surfaces
Protect film hardness big, fitting curved surface mobile phone rear stability is good, can be bonded with curve screens perfection, durable scratch resistance, is curved surface hand
Machine screen provides more stable, effective and comprehensive protection；And it is easy pad pasting, experience property is good.
The second object of the present invention is to provide a kind of laminating method of coating of curved surface protective film, and simple process, step is few,
Safe operation.
The third object of the present invention is to provide a kind of forming method of curved surface protective film, simple process, safe operation letter
It is single, it is at low cost.
An object of the present invention adopts the following technical scheme that realization:
A kind of curved surface protective film, including stack gradually from top to bottom the first PET release film, the first hardened layer, substrate layer,
Second hardened layer, layer of silica gel and fluoridated silicone release layer；Wherein, the first PET release film includes the release membrane body of PET,
And the first glue-line below the release membrane body of the PET is set.
Further, first hardened layer and second hardened layer are polyurethane acrylic resin layer；The base
Material layer is PET base material, PMMA substrate, PC substrate, alternatively, the substrate layer is the composite base material of PMMA and PC；First glue
Layer is acrylic glue.
Further, the first PET release film with a thickness of 40-60 μm；First hardened layer and described second is firmly
Equal 15-20 μm of thickness for changing layer；The substrate layer with a thickness of 125-300 μm；The layer of silica gel with a thickness of 50-70 μm；Institute
State fluoridated silicone release layer with a thickness of 40-60 μm.
Further, the substrate layer is PET base material, with a thickness of 125-188 μm；It is 300mm/min in peeling rate
Under conditions of, the peel strength of the layer of silica gel is greater than 100g/25mm.
The second object of the present invention adopts the following technical scheme that realization:
A kind of laminating method of coating of curved surface protective film, the curved surface protective film includes first stacked gradually from top to bottom
PET release film, the first hardened layer, substrate layer, the second hardened layer, layer of silica gel and fluoridated silicone release layer；The coating is laminating
Method includes:
First application step: taking substrate layer, is respectively coated the first resin and second in the top and bottom of the substrate layer
After resin, first resin and second resin solidification, the first hardened layer and the second hardened layer are formed；
First laminating step: taking the first PET release film, and the first PET release film includes the release membrane body of PET, and
The first glue-line below the release membrane body of the PET is set；Using the release membrane body of the PET as top surface, first glue-line
It is bonded with the top surface of first hardened layer；
Second application step: after one layer of silica gel of bottom-surface coated of second hardened layer, silica gel solidification, silica gel is formed
Layer；
Second laminating step: fluoridated silicone release layer is pasted in the bottom surface of the layer of silica gel；It is described to finally obtain
Curved surface protective film.
Further, in first application step, first resin and second resin are polyurethane third
Olefin(e) acid resin；It is coated using roll coating model, the revolving speed of applicator roll is 20-40m/min, and the charging rate of the substrate layer is
3-30m/min；After coating, curing process is carried out in conjunction with oven drying and ultraviolet light both modes, to obtain
First hardened layer and second hardened layer；
In second application step, it is coated using roll coating model；
In the described second laminating step: after pasting the fluoridated silicone release layer, carrying out maturation processing.
Further, in first application step, the applicator roll is ceramic oblique tooth-shaped anilox roll；Curing process
When, oven drying is carried out first, then carries out ultraviolet light；The temperature of baking oven is 50-100 DEG C, drying time 2-4min；
The power of ultraviolet lamp is 80-100W/cm, irradiation time 3-5s；
In second application step, the applicator roll is anilox roll；Curing process is carried out at 120 DEG C, the time is
120-150s；
In the described second laminating step, the operation of maturation processing is as follows: placing 72h at normal temperature, or in 50 DEG C of item
It is placed for 24 hours under part.
The third object of the present invention adopts the following technical scheme that realization:
A kind of forming method of curved surface protective film, the curved surface protective film include the first PET stacked gradually from top to bottom
Release film, the first hardened layer, substrate layer, the second hardened layer, layer of silica gel and fluoridated silicone release layer；The forming method includes
Following steps:
Laminating 2nd PET release film: taking two the 2nd PET release films, and two the 2nd PET release films are pasted respectively
On the top surface of the first PET release film and the bottom surface of the fluoridated silicone release layer, semi-finished product are obtained；
Be put into mold: the mold includes upper mold and lower mold, the semi-finished product of pre-set dimension be put into it is described under
After in mold, lid closes the upper mold；
Heating mould: being put into the mold and be sequentially placed into the first heating case, the second warming box and third warming box, institute
The temperature for stating the first heating case is 140-180 DEG C, and the temperature of second warming box is 170-220 DEG C, the third warming box
Temperature be 170-220 DEG C；The mold is in the first heating case, second warming box and the third warming box
Holding time is 5-15min；
It pushes mold: pressing down the upper mold using equipment is pushed, pushing speed is 50-500cm/min, pressing time
For 2-10min；
Cooling mold: the mold as under conditions of -30-0 DEG C, 2-10min is kept；
Depanning: opening the mold, takes out material, tears two the 2nd PET release films；It is described to finally obtain
Curved surface protective film.
Further, the fusing point of the 2nd PET release film is greater than 180 DEG C, with a thickness of 40-60 μm；At 150 DEG C,
Under the conditions of the thermal contraction test of 30min, lateral shrinkage≤2 of the 2nd PET release film, longitudinal contraction rate≤0.2；
The upper mold and the lower mold are graphite jig；It is all provided in the wall surface of the upper mold and the lower mold
It is equipped with heat conducting pipe.
Further, the forming method carries out in continuous tunnel furnace, and the continuous tunnel furnace includes running track, the operation rail
The initial end in road is provided with die entrance, and clearing end is provided with mould outlet；Orbiting direction, in the running track
On be disposed with the first heating case, the second warming box, third warming box, depress to molding box and household freezer；The first heating
Heater is provided in case, second warming box and the third warming box；Described depress to is provided with pushing in molding box
Cylinder；The first heating case, third warming box, depresses to and is enclosed with heat-preservation cotton outside molding box and household freezer the second warming box.
Compared with prior art, the beneficial effects of the present invention are:
(1) curved surface protective film provided by the present invention is provided with hardened layer in the two sides up and down of substrate layer, if only set
One layer of hardened layer, it is excessive to will lead to internal stress in hardening process, and protective film is caused to crimp；And the mode of two-sided hardening can be two-sided
The internal stress in hardening process is offset, keeps protective film integrally straight.Also, two-sided hardening is able to ascend the hardness of protective film.
After two-sided cure process, material surface under the pressure of 750g up to 6H-9HS hardness (test is according to JIS 5600-5-4:
1999), use #0000 steel wool in the rate test of 60 times/min under the pressure of 1kg, rub resistance is resistance to up to 2000 times or more
Scrape wear-resisting, the service life is long.
(2) PET release layer is arranged in curved surface protective film provided by the present invention on the first hardened layer, and surface is smooth, will not
Influence touch screen experience；Layer of silica gel is set on the second hardened layer, the final fitting stability of product can be improved；And silica gel mobility
Preferably, it is easy to be vented.
(3) the laminating method of coating of curved surface protective film provided by the present invention, simple process, step is few, safe operation.
(4) the forming method simple process of curved surface protective film provided by the present invention, safe operation is simple, at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of curved surface protective film provided by the present invention；
Fig. 2 is structural schematic diagram when curved surface protective film provided by the present invention is put into mold at the time of molding；
Fig. 3 is the structural schematic diagram of the continuous tunnel furnace used when curved surface protective film provided by the present invention forms.
In figure: 10, substrate layer；20, the first hardened layer；30, the second hardened layer；40, the first PET release film；50, silica gel
Layer；60, fluoridated silicone release layer；70, the 2nd PET release film；80, track；81, die entrance；82, mould outlet；83,
One warming box；84, the second warming box；85, third warming box；86, molding box is depressed to；87, household freezer；88, at modulus.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
As shown in Figure 1, a kind of curved surface protective film, the first PET release film 40, first including stacking gradually from top to bottom is hard
Change layer 20, substrate layer 10, the second hardened layer 30, layer of silica gel 50 and fluoridated silicone release layer 60；Wherein, the first PET release film
40 include the release membrane body of PET, and the first glue-line below the release membrane body of PET is arranged in.
Curved surface protective film provided by the present invention is provided with hardened layer in the two sides up and down of substrate layer, if only setting one
Layer hardened layer, it is excessive to will lead to internal stress in hardening process, and protective film is caused to crimp；And the mode of two-sided hardening two-sided can support
Internal stress in the hardening process that disappears keeps protective film integrally straight.Also, two-sided hardening is able to ascend the hardness of protective film.It is double
After the cure process of face, material surface reachable 6H-9HS hardness (test foundation JIS 5600-5-4:1999) under the pressure of 750g,
With #0000 steel wool in the rate test of 60 times/min under the pressure of 1kg, for rub resistance up to 2000 times or more, scratch resistance is wear-resisting,
Service life is long.
Curved surface protective film provided by the present invention, solve traditional protection film fitting curved surface mobile phone stability it is poor, experience
Property the problem of, while promoted fitting curved surface protective film durability, it is functional the problems such as, preferably to adapt to the hair of curved surface mobile phone
Exhibition trend provides more stable, effective and comprehensive protection for curved surface mobile phone screen.Meanwhile the product is safeguard film for cellular phone
The further development of industry provides good scheme, and applied material, equipment utilization, processing method, product philosophy etc. are all
One completely new R&D direction, while being provided for the existing issue in industry and solving direction.
As further embodiment, the first hardened layer and the second hardened layer are polyurethane acrylic resin layer.Its
Also containing a small amount of other compositions such as urethanes, siloxanes in middle polyurethane acrylic resin, that is, additive is auxiliary
The ingredient of class is helped, these ingredients do not play main hardness in hardened layer.
As further embodiment, substrate layer is PET base material, PMMA substrate, PC substrate, alternatively, substrate layer is
The composite base material of PMMA and PC.Such thermoplastic material has by thermal softening, the performance of hardening by cooling, in 125-300 μ m thick
In the range of be easy hot bending shape, and it is least small.But if using PMMA substrate, PC substrate, alternatively, using PMMA and
When the composite base material of PC, application step on base material can change the mode for pasting AB glue into.
As further embodiment, the first glue-line is acrylic glue.After forming hardened layer, the surface of material relatively light
Sliding, there are bubbles and silica gel transfer phenomena to occur to prevent, using acrylic glue-type PET release film.
As further embodiment, the first PET release film with a thickness of 40-60 μm；First hardened layer and second is firmly
Equal 15-20 μm of thickness for changing layer；Substrate layer with a thickness of 125-300 μm；Layer of silica gel with a thickness of 50-70 μm；Fluoridated silicone
Release layer with a thickness of 40-60 μm.
As further embodiment, substrate layer is PET base material, and with a thickness of 125-188 μm, the substrate of this thickness exists
It finds least smaller in test process, is relatively easy to control, while cooperating high viscose glue auxiliary can preferable laminating cambered surface screen.
As further embodiment, under conditions of peeling rate is 300mm/min, the glue peel strength of layer of silica gel
Greater than 100g/25mm.Layer of silica gel is formed using high viscous silica gel, the final fitting stability of product can be improved in the viscous silica gel of height；And
Silica gel mobility is preferable, it is easier to be vented.The protective film of hot bending shape can be corresponding by the shape of hand-set lid after mainly forming
Lower button, but still need it is high it is shoes complementary fitting is carried out to arcuate positions, be second to utilize height first is that touching screen
Shoes raising overall stability effectively prevent the shape rebound phenomena of product.
A kind of laminating method of coating of curved surface protective film, curved surface protective film include the first PET stacked gradually from top to bottom
Release film, the first hardened layer, substrate layer, the second hardened layer, layer of silica gel and fluoridated silicone release layer；It is coated with laminating method packet
It includes:
First application step: taking substrate layer, is respectively coated the first resin and the second resin in the top and bottom of substrate layer,
After first resin and the second resin solidification, the first hardened layer and the second hardened layer are formed；
First laminating step: taking the first PET release film, and the first PET release film includes the release membrane body of PET, and setting
The first glue-line below the release membrane body of PET；Using the release membrane body of PET as top surface, the top of the first glue-line and the first hardened layer
Face paste is closed；
Second application step: after one layer of silica gel of bottom-surface coated of the second hardened layer, silica gel solidification, layer of silica gel is formed；
Second laminating step: fluoridated silicone release layer is pasted in the bottom surface of layer of silica gel；After maturation processing, thus final
To curved surface protective film.
As further embodiment, in the first application step, the first resin and the second resin are polyurethane third
Olefin(e) acid resin；It is coated using roll coating model, the revolving speed of applicator roll is 20-40m/min, and the charging rate of substrate layer is 3-
30m/min can obtain the preferable coating of hardness and translucency with this condition；After coating, in conjunction with oven drying and purple
Outer light irradiates both modes and carries out curing process, to obtain the first hardened layer and the second hardened layer；
In the second application step, it is coated using roll coating model；
In the second laminating step: after pasting fluoridated silicone release layer, carrying out maturation processing.
As further embodiment, in the first application step, applicator roll is ceramic oblique tooth-shaped anilox roll；At solidification
When reason, oven drying is carried out first, then carries out ultraviolet light；The temperature of baking oven is 50-100 DEG C, drying time 2-
4min；The power of ultraviolet lamp is 80-100W/cm, irradiation time 3-5s；In the second application step, applicator roll is anilox roll；?
Curing process, time 120-150s are carried out at 120 DEG C；
In the second laminating step, the operation of maturation processing is as follows: placing 72h at normal temperature, or under conditions of 50 DEG C
It places for 24 hours.
A kind of forming method of curved surface protective film, curved surface protective film include the first PET that stacks gradually from top to bottom release
Film 40, the first hardened layer 20, substrate layer 10, the second hardened layer 30, layer of silica gel 50 and fluoridated silicone release layer 60；Forming method
The following steps are included:
Laminating 2nd PET release film 70 (as shown in Figure 2): taking two the 2nd PET release films 70, respectively two second
PET release film 70 is covered on the top surface of the first PET release film 40 and the bottom surface of fluoridated silicone release layer 60, obtain half at
Product；
Be put into mold: mold includes upper mold and lower mold, and model as needed cuts semi-finished product with laser equipment
At corresponding size, after the semi-finished product of well cutting are put into lower mold, then upper mold is closed according to slot position and lower die cover；
At this time since material does not soften also, therefore upper mold can not be compressed with lower mold；
Heating mould: placing the mould into and be sequentially placed into the first heating case, the second warming box and third warming box, and first liter
The temperature of incubator is 140-180 DEG C, and the temperature of the second warming box is 170-220 DEG C, and the temperature of third warming box is 170-220
℃；Holding time of the mold in the first heating case, the second warming box and third warming box is 5-15min；This 3 rise at this time
In incubator body, material starts to soften, and is influenced by the gravity of upper mold, and the gap that mold is overlapped can be smaller and smaller；
It pushes mold: pressing down upper mold using equipment is pushed, pushing speed is 50-500cm/min, pressing time 2-
10min；It is i.e. slow to push, mold and material damage are avoided, upper mold is completely coincident with lower mold at this time；
Cooling mold: it pushes equipment and pressed status is kept to enter under conditions of -30-0 DEG C together with mold, keep 2-
10min；
Depanning: opening mold, takes out material, tears two the 2nd PET release films；To finally obtain curved surface protective film.
As further embodiment, the fusing point of the 2nd PET release film is greater than 180 DEG C, with a thickness of 40-60 μm；?
150 DEG C, under the conditions of the thermal contraction test of 30min, lateral shrinkage≤2 of the 2nd PET release film, longitudinal contraction rate≤0.2.I.e.
2nd PET release film is high temperature resistant PET release film, after the completion of product hot bending shape, needs to tear, and when product formal shipment is that do not have
There is the 2nd PET release film resistant to high temperature.2nd PET release film subtracts primarily to excessive material is prevented during hot bending to deform
Few hot pressing die/foreign extrudes impression or pressure point to material, keeps the cleaning and flatness of material.
As further embodiment, in being put into molding process, sprayed first on the surface of upper mold and lower mold
Release agent is wiped with non-dust cloth after release agent is dry, then semi-finished product is put into lower mold.
As further embodiment, upper mold and lower mold are graphite jig, using resistance to compression 135 (Mpa), anti-folding
65 (Mpa), bulk density 1.92, the graphite jig of hardness 67 (HSD)；Graphite jig is light-weight, and specific gravity is the 1/5 of copper；Processing
Performance is good, impulse- free robustness after machining, is easy for the later period and repairs a die by hand；The fusing point of graphite is 3850 ± 50 DEG C, and boiling point is 4250 DEG C,
Thermal expansion coefficient also very little reports loss rate low under high temperature environment, reduces production cost；Good heat conductivity, to material heat transfer processing
It is good；Good thermal shock is able to take the acute variation of temperature and will not destroy when graphite uses at normal temperature, when temperature jump,
Volume change is little, will not crack.It is provided with heat conducting pipe in the wall surface of upper mold and lower mold, so that the material in mold
Material is preferably heated, and molding is more preferable.
In specific application, for the curved surface mobile phone of different model, mold is made, is tested by multiple hot bending/cooling,
Calculate the average value of rebound offset distance.Curved surface protective film according to the present invention calculates, and rebound value is at 15-35 °；According to the above ginseng
Number carries out mold rest and reorganization, makes 20-40 ° of the curvature portion indent of mold；Thus mold tolerance come maximize offset material rebound
Coefficient.Also, in actual operation, the die clearance between upper mold and lower mold is set according to the thickness of preformed material
It is fixed, for example, the die clearance between upper mold and lower mold can be set as 200-550 μm.
As further embodiment, forming method carries out in continuous tunnel furnace, as shown in figure 3, continuous tunnel furnace includes operation
Track 80, the initial end of running track 80 are provided with die entrance 81, and clearing end is provided with mould outlet 82, the end of track
Place is provided with 88 at modulus；Along 80 traffic direction of track, the first heating case 83, the second warming box are disposed on track 80
84, third warming box 85, depress to molding box 86 and household freezer 87 (rapid cooling region)；The first heating case 83, the second warming box
84 and third warming box 85 in be provided with heater, have independent temperature control；It depresses in molding box 86 and is provided with lower air cylinder；First
Warming box 83, third warming box 85, depresses to and is enclosed with heat-preservation cotton outside molding box 86 and household freezer 87 second warming box 84, most
The stability of bigization guarantee temperature.
Embodiment 1
A kind of curved surface protective film is prepared according to following methods:
One, it is coated with laminating
First application step: taking the PET base material layer with a thickness of 125 μm, using roll coating model in the top surface and bottom of PET base material
Face is respectively coated the polyurethane acrylic resin with a thickness of 18 μm, and applicator roll is ceramic oblique tooth-shaped anilox roll, the revolving speed of applicator roll
For 40m/min, the charging rate of PET base material is 30m/min；Polyurethane acrylic resin solidification after, formed the first hardened layer and
Second hardened layer；Oven drying and ultraviolet light both modes is successively combined to carry out curing process, the temperature of baking oven is 50-
100 DEG C, drying time 2-4min；The power of ultraviolet lamp is 80-100W/cm, irradiation time 3-5s；
First laminating step: the first PET release film of acrylic glue-type with a thickness of 50 μm is taken, and is covered in the first hardened layer
Top surface on；
Second application step: one layer 50 μm of bottom-surface coated of the silica gel using roll coating model in the second hardened layer, applicator roll
For anilox roll；Used silica gel is high viscous silica gel, and under conditions of peeling rate is 300mm/min, the removing of the layer of silica gel is strong
Degree is greater than 100g/25mm；Then curing process 120s is carried out at 120 DEG C, forms layer of silica gel；
Second laminating step: the fluoridated silicone release layer with a thickness of 50 μm is pasted in the bottom surface of layer of silica gel；Then
72h maturation is placed under room temperature, obtains the first semi-finished product；
Two, it forms
Laminating 2nd PET release film: taking the 2nd PET release film of 50 μm of two thickness, respectively in the first PET release film
On top surface and the bottom surface of fluoridated silicone release layer, the second semi-finished product are obtained；2nd 180 DEG C of PET release film heatproof；
Cut: the second semi-finished product are cut into corresponding size with laser equipment by model as needed, obtain third half
Finished product；
Molding equipment is arranged: molding equipment includes continuous tunnel furnace, and continuous tunnel furnace includes running track, and the initial end of running track is set
It is equipped with die entrance, clearing end is provided with mould outlet；Orbiting direction, is disposed with first in running track
Warming box, third warming box, depresses to molding box and household freezer at the second warming box；It depresses to and is provided with lower air cylinder in molding box, under
Air cylinder can enter household freezer with running track；
Be put into mold: mold is graphite jig, including upper mold and lower mold；First on the surface of upper mold and lower mold
Release agent is sprayed, after release agent is dry, is wiped with non-dust cloth, then third semi-finished product is put into lower mold, described in lid conjunction
Upper mold；
Heating mould: mold enters running track from die inlet, then passes sequentially through the first heating case, the second warming box
With third warming box, the temperature of the first heating case is 180 DEG C, and the temperature of the second warming box is 220 DEG C, the temperature of third warming box
It is 170 DEG C；Holding time of the graphite jig in the first heating case, the second warming box and third warming box is 15min；
Push mold: when mold completely by all warming box after enter down-pressing forming case, lower air cylinder presses down upper mold
Tool, pushing speed are 50cm/min, pressing time 10min；
Cooling mold: lower air cylinder keeps pressed status to enter household freezer together with mold, and the temperature of household freezer is -30
DEG C, keep 2min；
Depanning: mold comes out from household freezer, reaches mould outlet with running track, runs from mould outlet to from modulus
When, mold is risen again, and is taken out the material in mold, is torn two the 2nd PET release films；To finally obtain curved surface protective film.
Embodiment 2
Embodiment 2 difference from example 1 is that: the first PET release film with a thickness of 40 μm；The thickness of PET base material
Degree is 188 μm；First hardened layer with a thickness of 15 μm, the second hardened layer with a thickness of 20 μm；The thickness of fluoridated silicone release layer
Degree is 60 μm；
In the second laminating step, the operation of maturation processing is as follows: placing for 24 hours under conditions of 50 DEG C.
Other are identical as specific embodiment 1.
Embodiment 3
Embodiment 3 difference from example 1 is that: in the first application step, the revolving speed of applicator roll is 20m/
Min, the charging rate of PET base material are 3m/min；
In the second application step, the viscous silica gel of height carries out curing process 150s at 120 DEG C, forms layer of silica gel；
In heating mould step, the temperature of the first heating case is 140 DEG C, and the temperature of the second warming box is 170 DEG C, third
The temperature of warming box is 220 DEG C；Graphite jig is 15min in the holding time of the first heating case, in the second warming box and third
Holding time in warming box is 5min；
In pushing molding process, pushing speed is 500cm/min, pressing time 2min；
In cooling molding process, lower air cylinder keeps pressed status to enter household freezer, the temperature of household freezer together with mold
Degree is 0 DEG C, keeps 10min.
Other are identical as specific embodiment 1.
Comparative example 1
Comparative example 1 difference from example 1 is that: the mold be steel die.
Other are identical as specific embodiment 1.
Comparative example 2
Comparative example 2 difference from example 1 is that: layer of silica gel is not to be formed by curing by the viscous silica gel of height, is compared
For the silica gel of example 2 under conditions of peeling rate is 300mm/min, peel strength is less than 100g/25mm, and the coating thickness of silica gel
It is 30 μm.
Other are identical as specific embodiment 1.
Effect assessment and performance detection
The performance of the curved surface protective film of embodiment 1-3 and comparative example 1-2 is detected, detection project and result are referring to table
1。
Table 1: performance test results record sheet
It can be obtained by upper table 1, the curved surface protective film that embodiment 1-3 is obtained can coincide curve screens well, compactness
It is good, and scratch resistance is wear-resisting, no rebound tilts phenomenon, and embodiment 1 is most preferred embodiment.And the curved surface protective film of comparative example 1 is to use steel
What molding jig was prepared, steel die cost of manufacture is high, and mold weight is big, and upper mold is caused to be easy material crushing；Punching block
Tool dilatancy is higher, causes the precision of material hot bending insufficient, influences to be bonded.And the curved surface protective film of comparative example 2, it is after molding
The viscosity of finished product, layer of silica gel is insufficient, can not be bonded mobile phone screen, and arcuate positions serious material occur and warp phenomenon.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (7)
1. a kind of preparation method of curved surface protective film, it is characterised in that: the laminating step of coating and molding step including successively carrying out
Suddenly, the curved surface protective film include the first PET release film stacked gradually from top to bottom, it is the first hardened layer, substrate layer, second hard
Change layer, layer of silica gel and fluoridated silicone release layer；Wherein, the first PET release film includes the release membrane body of PET, Yi Jishe
Set the first glue-line below the release membrane body of the PET；First hardened layer and second hardened layer are polyurethane
Acrylate resin layer；The substrate layer is the composite base material of PMMA and PC；First glue-line is acrylic glue；
Wherein, the forming step is as described below:
Laminating 2nd PET release film: taking two the 2nd PET release films, and two the 2nd PET release films are covered in institute respectively
It states on the top surface of the first PET release film and the bottom surface of the fluoridated silicone release layer, obtains semi-finished product；
Be put into mold: the mold includes upper mold and lower mold, and the upper mold and the lower mold are graphite jig；?
After the semi-finished product of pre-set dimension are put into the lower mold, lid closes the upper mold；
Heating mould: being sequentially placed into the mold in the first heating case, the second warming box and third warming box, and described first liter
The temperature of incubator is 140-180 DEG C, and the temperature of second warming box is 170-220 DEG C, and the temperature of the third warming box is
170-220℃；Holding time of the mold in the first heating case, second warming box and the third warming box
It is 5-15min；
It pushes mold: pressing down the upper mold using equipment is pushed, pushing speed is 50-500cm/min, pressing time 2-
10min；
Cooling mold: the mold as under conditions of -30-0 DEG C, 2-10min is kept；
Depanning: opening the mold, takes out material, tears two the 2nd PET release films；To finally obtain the curved surface
Protective film.
2. the preparation method of curved surface protective film as described in claim 1, it is characterised in that: the thickness of the first PET release film
Degree is 40-60 μm；Equal 15-20 μm of thickness of first hardened layer and second hardened layer；The substrate layer with a thickness of
125-300μm；The layer of silica gel with a thickness of 50-70 μm；The fluoridated silicone release layer with a thickness of 40-60 μm.
3. the preparation method of curved surface protective film as described in claim 1, it is characterised in that: the 2nd PET release film melts
Point is greater than 180 DEG C, with a thickness of 40-60 μm；Under the conditions of 150 DEG C, the thermal contraction test of 30min, the 2nd PET release film
Lateral shrinkage≤2, longitudinal contraction rate≤0.2；
Heat conducting pipe is provided in the wall surface of the upper mold and the lower mold.
4. the preparation method of curved surface protective film as claimed in claim 1 or 3, it is characterised in that: the forming step is in tunnel
It is carried out in furnace, the continuous tunnel furnace includes running track, and the initial end of the running track is provided with die entrance, and clearing end is set
It is equipped with mould outlet；Orbiting direction, be disposed in the running track the first heating case, the second warming box,
Third warming box depresses to molding box and household freezer；In the first heating case, second warming box and the third warming box
It is provided with heater；Described depress to is provided with lower air cylinder in molding box；The first heating case, the second warming box, third
Warming box depresses to and is enclosed with heat-preservation cotton outside molding box and household freezer.
5. the preparation method of curved surface protective film as described in claim 1, it is characterised in that: the laminating step of the coating includes:
First application step: taking substrate layer, is respectively coated the first resin and the second resin in the top and bottom of the substrate layer,
After first resin and second resin solidification, the first hardened layer and the second hardened layer are formed；
First laminating step: taking the first PET release film, and the first PET release film includes the release membrane body of PET, and setting
The first glue-line below the release membrane body of the PET；Using the release membrane body of the PET as top surface, first glue-line and institute
State the top surface fitting of the first hardened layer；
Second application step: after one layer of silica gel of bottom-surface coated of second hardened layer, silica gel solidification, layer of silica gel is formed；
Second laminating step: fluoridated silicone release layer is pasted in the bottom surface of the layer of silica gel.
6. the preparation method of curved surface protective film as claimed in claim 5, it is characterised in that:
In first application step, first resin and second resin are polyurethane acrylic resin；Using
Roll coating model is coated, and the revolving speed of applicator roll is 20-40m/min, and the charging rate of the substrate layer is 3-30m/min；It applies
After cloth, curing process is carried out in conjunction with oven drying and ultraviolet light both modes, to obtain first hardening
Layer and second hardened layer；
In second application step, it is coated using roll coating model；
In the described second laminating step: after pasting the fluoridated silicone release layer, carrying out maturation processing.
7. the preparation method of curved surface protective film as claimed in claim 6, it is characterised in that: in first application step,
The applicator roll is ceramic oblique tooth-shaped anilox roll；When curing process, oven drying is carried out first, then carries out ultraviolet light；
The temperature of baking oven is 50-100 DEG C, drying time 2-4min；The power of ultraviolet lamp is 80-100W/cm, irradiation time 3-5s；
In second application step, the applicator roll is anilox roll；Curing process, time 120- are carried out at 120 DEG C
150s；
In the described second laminating step, the operation of maturation processing is as follows: placing 72h at normal temperature, or under conditions of 50 DEG C
It places for 24 hours.
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| PCT/CN2017/092080 WO2018196162A1 (en) | 2017-04-29 | 2017-07-06 | Curved surface protective film, coating and laminating method and forming method therefor |
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| CN108162625B (en) * | 2018-01-09 | 2020-02-21 | 东莞市松烁硅胶科技有限公司 | Method for transferring lettering film or decorative film by hot stamping of silica gel |
| CN108329861A (en) * | 2018-02-11 | 2018-07-27 | 江苏斯迪克新材料科技股份有限公司 | A kind of thermal finalization protective film applied to camber display screen |
| SG11202012852TA (en) * | 2018-06-22 | 2021-01-28 | Kobayashi & Co Ltd | Release film and method of manufacturing release film |
| CN109177423B (en) | 2018-07-12 | 2020-07-03 | 深圳市康成泰实业有限公司 | Terminal curved surface protective film and manufacturing method thereof |
| CN113930179A (en) * | 2020-06-29 | 2022-01-14 | 华为技术有限公司 | Protection film, flexible screen module and electronic equipment of flexible screen |
| CN112708370B (en) * | 2020-12-28 | 2022-11-15 | 宁波长阳科技股份有限公司 | Anti-glare protective film and preparation method and application thereof |
| CN113667422A (en) * | 2021-08-31 | 2021-11-19 | 太湖金张科技股份有限公司 | Coating preparation method for improving glue overflow performance of AB double-sided adhesive tape |
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