CN108034383A - Shading foam tape, its preparation method and electronic equipment - Google Patents
Shading foam tape, its preparation method and electronic equipment Download PDFInfo
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- CN108034383A CN108034383A CN201711466374.2A CN201711466374A CN108034383A CN 108034383 A CN108034383 A CN 108034383A CN 201711466374 A CN201711466374 A CN 201711466374A CN 108034383 A CN108034383 A CN 108034383A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
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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
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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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
- 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
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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
- 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
- C09J2301/302—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 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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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
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/041—Presence of homo or copolymers of ethene in the barrier layer
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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
- C09J2475/00—Presence of polyurethane
- C09J2475/001—Presence of polyurethane in the barrier layer
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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Adhesive Tapes (AREA)
Abstract
The present invention provides a kind of shading foam tape, its preparation method and electronic equipment.The shading foam tape includes shading glue belt, the first pressure-sensitive adhesive layer and foamed cotton layer, multiple micro-structures are provided with one side surface of shading glue belt, first pressure-sensitive adhesive layer is arranged on the surface of the remote micro-structure side of shading glue belt, and foamed cotton layer is arranged on surface of first pressure-sensitive adhesive layer away from shading glue belt side.Since above-mentioned shading foam tape has multiple micro-structures, thus during the use of shading foam tape, incident light side with micro-structure from the first pressure-sensitive adhesive layer is injected, refraction and reflex by means of micro-structure, it can suppress above-mentioned incident light and enter display screen through shading foam tape, so as to fulfill the effect of display screen contrast is improved.At the same time compared to existing shading rubber belt, the shading foam tape that the application provides also has the advantages that to be easy to paste and heavy industry is good.
Description
Technical field
The present invention relates to OLED fields, are set in particular to a kind of shading foam tape, its preparation method and electronics
It is standby.
Background technology
OLED technology has been widely used in mobile phone display field at present, and infiltration of the OLED technology in mobile phone increases year by year
Add.It is usually glass or PI (polyimides) in the basalis of OLED (organic electroluminescent LED) mobile phone, this has leakage
The risk of light.In order to solve the above-mentioned technical problem, in the design process, it will usually increase by one layer of shading glue behind display screen
Band, to increase the contrast of screen.The preparation method of current shading rubber belt has two kinds：First way is by gathering in black
The method of pressure-sensitive adhesive coating is made in vinyl film, and above-mentioned shading rubber belt then is attached to OLED screen backstage face；Another way is
The painting black ink on transparent polyethylene membrance, the then pressure-sensitive adhesive coating on above-mentioned polyethylene film, and be attached to OLED screen backstage
Face.But the consideration of opponent's machine thickness is in order at, the thinner thickness of the polyethylene film used in shading rubber belt, because regardless of whether using upper
Shading rubber belt made from which kind of mode is stated, still has some light to pass through display screen, so as to cause the contrast of display screen to decline.
The content of the invention
It is a primary object of the present invention to provide a kind of shading foam tape, its preparation method and electronic equipment, to solve
The problem of shaded effect of foam tape is poor in existing OLED screen curtain.
To achieve these goals, a kind of shading foam tape, shading foam are provided according to an aspect of the present invention
Adhesive tape includes：Shading glue belt, is provided with multiple micro-structures on a side surface of shading glue belt；First pressure-sensitive adhesive layer, first
Pressure-sensitive adhesive layer is arranged on the surface of the remote micro-structure side of shading glue belt；And foamed cotton layer, it is pressure-sensitive that foamed cotton layer is arranged on first
Surface of the glue-line away from shading glue belt side.
Further, shading glue belt includes：Second pressure-sensitive adhesive layer, a side surface of the second pressure-sensitive adhesive layer are provided with multiple
Micro-structure；And substrate layer, substrate layer are arranged on the side of close first pressure-sensitive adhesive layer of the second pressure-sensitive adhesive layer.
Further, micro-structure is arc groove or column prism；Preferably, it is micro- on the direction of shading glue belt
The height of structure is 8~12 μm.
Further, micro-structure is arranged in array on the surface of the first pressure-sensitive adhesive layer.
Further, foamed cotton layer is prepared by foaming concentrate, aid master batches and the irradiated crosslinking of polyethylene；Wherein, send out
Bubble masterbatch is prepared by thermoplastic polyurethane and polyethylene；Aid master batches are by polyethylene, impedance reinforcing aids and foaming agent system
It is standby to obtain；Preferably, impedance reinforcing aids includes the one or more in activated carbon, graphite, graphene and carbon nanotubes.
Further, forming the method for foamed cotton layer includes：Polyethylene particle includes polyethylene particle A and polyethylene particle C；
Polyethylene particle A and polyurethane particles are subjected to the first mixing process, obtain foaming master batch；By foaming master batch and polyethylene particle
C is blended, and master slice is made；Master slice is irradiated by gamma-rays, foam is made；And foam is fitted in the remote of substrate layer
From the side of the first pressure-sensitive adhesive layer, foamed cotton layer is formed；
Further, the method for forming master slice further includes：Polyethylene particle further includes polyethylene particle B；By polyethylene
Grain B, impedance reinforcing aids and foaming agent carry out the second mixing process, obtain auxiliary agent master batch；By foaming master batch, auxiliary agent master batch and gather
Ethene particle C is blended, and master slice is made；Preferably, impedance reinforcing aids includes activated carbon, graphite, graphene and carbon nanometer
One or more in pipe.
On the other hand the application additionally provides a kind of preparation method of above-mentioned shading foam tape, preparation method includes：It is accurate
Standby master mold, the surface of master mold is convex-concave surface；Pressure sensitive adhesive is coated on the surface of master mold, forms the second pressure-sensitive adhesive layer, the second pressure
The surface that quick glue-line is in contact with master mold is formed with multiple micro-structures；By surface of second pressure-sensitive adhesive layer away from master mold side and base
Material layer is bonded, and after removing master mold, obtains shading glue belt；Bubble is formed in the side away from the second pressure-sensitive adhesive layer of substrate layer
Cotton layer, and then form shading foam tape.
Further, before the coating step of the second pressure sensitive adhesive is carried out, preparation method also includes on the surface of master mold
Coating release agent, the step of to form release film layer；Preferably, mould release is selected from silicone oil.
Further, the step of forming foamed cotton layer includes：Polyethylene particle includes polyethylene particle A and polyethylene particle C；
Polyethylene particle A and polyurethane particles are subjected to the first mixing process, obtain foaming master batch；By foaming master batch and polyethylene particle
C is blended, and master slice is made；Master slice is irradiated by gamma-rays, foam is made；And foam is fitted in the remote of substrate layer
From the side of the first pressure-sensitive adhesive layer, foamed cotton layer is formed；Preferably, the irradiation of radiation treatment process is 40~60kGy；It is preferred that
The weight ratio of ground, polyethylene particle A and polyurethane particles is 1~5:1.
Further, polyethylene particle further includes polyethylene particle B, and the step of preparing master slice further includes：By polyethylene
Grain B, impedance reinforcing aids and foaming agent carry out the second mixing process, obtain auxiliary agent master batch；By foaming master batch, auxiliary agent master batch and gather
Ethene particle C is blended, and master slice is made；Preferably, the weight ratio of polyethylene particle B, impedance reinforcing aids and foaming agent are
100:(0.5-1):(0.8-1.2)；Preferably, the weight ratio of foaming master batch, auxiliary agent master batch and polyethylene particle C is 1:(0.2~
0.5):(1~5)；Preferably, impedance reinforcing aids includes one kind or more in activated carbon, graphite, graphene and carbon nanotubes
Kind.
Further, after radiation treatment process is carried out, preparation method further includes：To the master slice after irradiated processing into
Row sided corona treatment, obtains foam.
Further, the step of foam is fitted in the side away from the second pressure-sensitive adhesive layer of substrate layer includes：In base material
The coating of the side away from the second pressure-sensitive adhesive layer pressure sensitive adhesive of layer, forms the first pressure-sensitive adhesive layer；In first pressure-sensitive adhesive layer away from the
The side fitting foam of two pressure-sensitive adhesive layers, forms foamed cotton layer.
The another aspect of the application additionally provides a kind of electronic equipment, and electronic equipment includes display screen and above-mentioned shading foam
Adhesive tape, and shading foam tape is attached to the back side of display screen.
Apply the technical scheme of the present invention, since above-mentioned shading foam tape has multiple micro-structures, thus shading foam
During the use of adhesive tape, incident light side with micro-structure from the first pressure-sensitive adhesive layer is injected, by means of the folding of micro-structure
Penetrate and reflex, above-mentioned incident light can be suppressed and enter display screen through shading foam tape, so as to fulfill display screen is improved
The effect of contrast.At the same time compared to existing shading rubber belt, the shading foam tape that the application provides, which also has, to be easy to paste
And heavy industry it is good the advantages that.
Brief description of the drawings
The accompanying drawings which form a part of this application are used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows a kind of structural representation of the shading foam tape that typical embodiment provides according to the present invention
Figure.
Wherein, above-mentioned attached drawing is marked including the following drawings：
10th, shading glue belt；11st, release film layer；12nd, the second pressure-sensitive adhesive layer；13rd, substrate layer；20th, the first pressure-sensitive adhesive layer；
30th, foamed cotton layer.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As the problem of background technology is described, and the shaded effect of foam tape is poor in existing OLED screen curtain.For
Solution above-mentioned technical problem, this application provides a kind of shading foam tape, which includes shading glue belt
10th, the first pressure-sensitive adhesive layer 20 and foamed cotton layer 30.Multiple micro-structures are provided with one side surface of shading glue belt 10, first is pressure-sensitive
Glue-line 20 is arranged on the surface of the remote micro-structure side of shading glue belt 10, and it is remote that foamed cotton layer 30 is arranged on the first pressure-sensitive adhesive layer 20
From the surface of 10 side of shading glue belt.
It is incident since above-mentioned shading foam tape has multiple micro-structures, thus during the use of shading foam tape
Light side with micro-structure from the first pressure-sensitive adhesive layer 20 is injected, and refraction and reflex by means of micro-structure, can press down
Make above-mentioned incident light and enter display screen through shading foam tape, so as to fulfill the effect of display screen contrast is improved.Same phase
Than in existing shading rubber belt, the shading foam tape that the application provides also has the advantages that to be easy to paste and heavy industry is good.
Specifically, shading glue belt 10 includes the second pressure-sensitive adhesive layer 12 and substrate layer 13.Wherein, second pressure-sensitive adhesive layer 12
One side surface is provided with multiple micro-structures, and substrate layer 13 is arranged on the one of close first pressure-sensitive adhesive layer 20 of the second pressure-sensitive adhesive layer 12
Side.Substrate layer 13 has certain mechanical strength, thus 13 and second pressure-sensitive adhesive layer 12 of substrate layer is collectively constituted shading rubber belt
Layer 10, is conducive to improve the stability of micro-structure on the shading rubber belt of shading rubber belt.
In the shading glue belt 10 that the application provides, base material can select material commonly used in the art.Preferably, base material
Material is PET and/or PP etc..The material of base material includes but not limited to above two, and since above-mentioned two material has thickness
Small, the advantages of cost is relatively low, pliability is good, thus select PET and PP to advantageously reduce the cost of shading rubber belt, make shading rubber belt
Easy to store and use, the thickness for reducing display screen is also helped.
Preferably, the thickness of substrate layer 13 is 8~12 μm.The thickness of substrate layer 13 includes but not limited to above-mentioned thickness, and
The thickness for being conducive to further reduce display screen within the above range is limited, makes mobile phone more frivolous.
In a preferred embodiment, micro-structure is arc groove and/or column prism；Had using above two micro-structure
Beneficial to further improving inhibition of the shading foam tape to incident ray.It is highly preferred that perpendicular to shading glue belt 10
Direction on, the height of micro-structure is 10 μm.The height of micro-structure includes but not limited to above range, and is limited to above-mentioned
In the range of be conducive to improve the first pressure-sensitive adhesive layer 20 refractive index so that further suppress incident ray penetrate in display screen.
Above-mentioned " height of micro-structure " refers to the ultimate range from the vertex of micro-structure to bottom surface.
In a preferred embodiment, micro-structure is arranged in array on the surface of the second pressure-sensitive adhesive layer 12.Micro- knot
Structure array arrangement on the surface of the second pressure-sensitive adhesive layer 12, this is conducive to improve the intensive of the micro-structure on the first pressure-sensitive adhesive layer 20
Degree, and then be conducive to further improve 12 refractive index of the second pressure-sensitive adhesive layer, reduce the risk that light passes through display screen.
Preferably, shading foam tape includes foamed cotton layer 30, and foamed cotton layer 30 is arranged on the pressure-sensitive away from first of substrate layer 13
The side of glue-line 20.Above-mentioned shading foam tape can achieve the purpose that shading and protection at the same time, but in use, it is above-mentioned
The man-hour of preparation method consumption is more, meanwhile, after two layers of fitting, heavy industry is poor.In addition, in an assembling process, foam
Adhesive tape easily adsorbs dust, and when having electrostatic, foreign matter or dust can be adsorbed onto on the object of static electrification, increase the resistance of foam
Can, that is, the resistance of foam is reduced, electric charge can be discharged, reduce foreign matter absorption.It is right in electronic product assembling process
Foreign matter has strict demand, therefore impedance is required, this is also the place that current foam needs to improve.
Preferably, above-mentioned shading foam tape further includes release film layer 11, which is arranged on the second pressure sensitive adhesive
The side of the remote substrate layer 13 of layer 12.This is conducive to carry out winding storage to shading foam tape.
In a preferred embodiment, foamed cotton layer 30 is by foaming concentrate, aid master batches and the irradiated crosslinking of polyethylene
It is prepared；Wherein, foaming concentrate is prepared by thermoplastic polyurethane and polyethylene；Aid master batches are increased by polyethylene, impedance
Strong auxiliary agent and foaming agent are prepared.Formed using polyethylene particle, polyurethane particles, impedance reinforcing aids and foaming agent as raw material
Foamed cotton layer 30 be conducive to improve foamed cotton layer 30 impedance behavior.Preferably, impedance reinforcing aids includes activated carbon, graphite, stone
One or more in black alkene and carbon nanotubes.
In a preferred embodiment, forming the method for foamed cotton layer 30 includes：Polyethylene particle includes polyethylene
Grain A and polyethylene particle C；Polyethylene particle A and polyurethane particles are subjected to the first mixing process, obtain foaming master batch；Will hair
Bubble master batch and polyethylene particle C are blended, and master slice is made；Master slice is irradiated by gamma-rays, foam is made；And will bubble
Cotton is fitted in the side away from the first pressure-sensitive adhesive layer 20 of substrate layer 13, forms foamed cotton layer 30.
Polyurethane particles have preferable resilience performance, fire resistance and moisture resistance energy, but mechanical performance is poor, and
Polyethylene particle has preferable mechanical performance, but resilience performance is poor.The two is carried out blending to be conducive to obtain with good
Resilience performance and mechanical performance foaming master batch.In above-mentioned preparation method, by polyethylene particle C and foaming master batch and auxiliary agent master batch
It is blended, irradiated, required foamed cotton layer 30 is made.In Blending Processes, the nucleation of the foaming master batch of addition as foaming process
Agent, advantageously reduces the weight of foam, while also helping makes the stomata that is formed in foam more uniform, careful, and then makes
It must use foam made from the above method that there is higher impedance effect.
In a preferred embodiment, the method for forming master slice further includes：Polyethylene particle further includes polyethylene
Grain B；Polyethylene particle B, impedance reinforcing aids and foaming agent are subjected to the second mixing process, obtain auxiliary agent master batch；Will foaming mother
Grain, auxiliary agent master batch and polyethylene particle C are blended, and master slice is made.In Blending Processes, the foaming master batch and auxiliary agent master batch of addition
As the nucleator of foaming process, be conducive to further improve the bubbling efficiency of foam, reduce the weight and resistance of foam
Can, and then improve the comprehensive performance of shading foam tape.Preferably, impedance reinforcing aids include activated carbon, graphite, graphene and
One or more in carbon nanotubes.
The application in order to better understand, the another aspect of the application additionally provide a kind of system of above-mentioned shading foam tape
Preparation Method, the preparation method include：Prepare master mold, the surface of master mold is convex-concave surface；Pressure sensitive adhesive is coated on the surface of master mold,
The second pressure-sensitive adhesive layer 12 is formed, the surface that the second pressure-sensitive adhesive layer 12 is in contact with master mold is formed with multiple micro-structures；By the second pressure
Surface of the quick glue-line 12 away from master mold side is bonded with substrate layer 13, after removing master mold, obtains shading glue belt 10；In base
The side away from the second pressure-sensitive adhesive layer 12 of material layer 13 forms foamed cotton layer 30, and then forms shading foam tape.
In the preparation method for the shading foam tape that the application provides, it is provided with the surface of master mold for forming micro- knot
The groove of structure, it is, cured by pressure-sensitive adhesives on the surface, obtain the second pressure-sensitive adhesive layer 12.Due to the spy of master structure
Different property, the second pressure-sensitive adhesive layer 12 with micro-structure can be obtained using the above method.Then by the remote of the second pressure-sensitive adhesive layer 12
Surface from master mold side is bonded with substrate layer 13, after removing master mold, obtains required shading glue belt 10.Shading foam
During the use of adhesive tape, incident light side with micro-structure from the second pressure-sensitive adhesive layer 12 is injected, by means of micro-structure
Refraction action and reflex, can suppress above-mentioned incident light and enter display screen through shading foam tape, so as to fulfill raising
The effect of display screen contrast.
Preferably, the first surface of master mold is sprayed with 30 μm of quantity for spray, to form the first pressure-sensitive adhesive layer 20.
In a preferred embodiment, before the coating step of the second pressure sensitive adhesive is carried out, above-mentioned preparation method is also
It is included in coating release agent on the surface of master mold.Coating release agent is advantageously reduced in above-mentioned preparation process on the surface of master mold
Demoulding difficulty.Preferably, mould release includes but not limited to silicone oil.
Preferably, above-mentioned preparation method be additionally included in the remote substrate layer 13 of the second pressure-sensitive adhesive layer 12 side set it is release
The step of film layer 11, this is conducive to carry out winding storage to shading foam.
The preparation method of the shading foam tape provided using the application, can be suppressed light well and pass through display screen
In, so as to be conducive to improve the contrast of display screen.Simultaneously because the trend of mobile phone development is slimming, OLED mobile phone screens
That does is more and more thinner.But there are broken equivalent risk for frivolous OLED mobile phone screens.Therefore in the design process, on solving
Problem is stated, is used in combination in some OLED screen curtains frequently with shading rubber belt and foam tape.Used in above-mentioned shading rubber belt
Foam can select material commonly used in the art.
In a preferred embodiment, the step of forming foamed cotton layer 30 includes：Polyethylene particle is included into polyethylene
Particle A and polyethylene particle C；Foaming master batch：Polyethylene particle A and polyurethane particles are subjected to the first mixing process, sent out
Steep master batch；Foaming master batch and polyethylene particle C are blended, master slice is made；And irradiated master slice by gamma-rays, make
Obtain foamed cotton layer 30.
Polyurethane particles have preferable resilience performance, fire resistance and moisture resistance energy, but mechanical performance is poor, and
Polyethylene particle has preferable mechanical performance, but resilience performance is poor.The two is carried out blending to be conducive to obtain with good
Resilience performance and mechanical performance foaming master batch.In above-mentioned preparation method, by polyethylene particle C and foaming master batch and auxiliary agent master batch
It is blended, irradiated, required foamed cotton layer 30 is made.In Blending Processes, the nucleation of the foaming master batch of addition as foaming process
Agent, advantageously reduces the weight of foam, while also helping makes the stomata that is formed in foam more uniform, careful, and then makes
It must use foam made from the above method that there is higher impedance effect.
Preferably, the irradiation of irradiation process is 40~60kGy.The irradiation of irradiation process includes but not limited to above-mentioned model
Enclose, limited be conducive within the above range shorten foam foamed time, while also so that foam inside porosity compared with
To be homogeneous, so that the impedance in foam is relatively stable.
There is good impedance effect using foam made from the above method.In a preferred embodiment, poly- second
The weight ratio of alkene particle A and polyurethane particles is 1~5:1.The weight ratio bag of the weight ratio of polyethylene particle A and polyurethane particles
Include but be not limited to above range, and limited and be conducive to the resilience performance for further improving foam and machinery within the above range
Intensity.
In a preferred embodiment, the preparation method of foamed cotton layer 30 further includes：Polyethylene particle includes polyethylene
Particle B, carries out the second mixing process by polyethylene particle B, impedance reinforcing aids and foaming agent, obtains auxiliary agent master batch；Will foaming
Master batch, auxiliary agent master batch and polyethylene particle C are blended, and the master slice is made.
Polyethylene particle B, impedance reinforcing aids and foaming agent are subjected to the second mixing process, are conducive to improve the resistance of foam
Anti-performance.In above-mentioned preparation method, first prepare foaming master batch and auxiliary agent master batch, then by polyethylene particle C and foaming master batch and
Auxiliary agent master batch is blended, is irradiated, and required foamed cotton layer 30 is made.
In Blending Processes, the nucleator of the foaming master batch and auxiliary agent master batch of addition as foaming process, is conducive to further
Ground improves the bubbling efficiency of foam, reduces the weight and impedance behavior of foam, and then improve the comprehensive performance of shading foam tape.
Preferably, impedance reinforcing aids include but not limited to one kind in activated carbon, graphite, graphene and carbon nanotubes or
It is a variety of.
Preferably, the weight ratio of polyethylene particle B, impedance reinforcing aids and foaming agent are 100:(0.5~1):(0.8~
1.2).The weight ratio of polyethylene particle B, carbon nanotubes and foaming agent include but not limited to above range, and are limited to
Be conducive to further improve the impedance behavior of foam in the range of stating.
Preferably, foaming agent includes but not limited to azodicarbonamide, diisopropyl azodiformate and tolysulfonyl
One or more in semicarbazides.
Preferably, the weight ratio of foaming master batch, auxiliary agent master batch and polyethylene particle C is 1:(0.2~0.5):(1~5).Hair
The weight ratio of bubble master batch, auxiliary agent master batch and polyethylene particle C includes but not limited to above range, and is limited to above range
Inside be conducive to further improve the comprehensive performance of foam.
In a preferred embodiment, after irradiation process is carried out, above-mentioned preparation method further includes：After irradiation
Master slice carry out sided corona treatment, obtain foam.Sided corona treatment is carried out to the master slice after irradiation to be conducive to improve the thick of foam surface
Rough degree, so that be conducive to improve foam and substrate layer 13 is bonded intensity.
In a preferred embodiment, foam is fitted in the side away from the second pressure-sensitive adhesive layer 12 of substrate layer 13
The step of include：Pressure sensitive adhesive is coated in the side away from the second pressure-sensitive adhesive layer 12 of substrate layer 13, forms the first pressure-sensitive adhesive layer 20；
And foam is bonded in the side away from the second pressure-sensitive adhesive layer 12 of the first pressure-sensitive adhesive layer 20, form above-mentioned foamed cotton layer 30.Second pressure
Being provided with for quick glue-line 12 is bonded process beneficial to simplify foamed cotton layer 30 and shading glue belt 10.
The another aspect of the application additionally provides a kind of electronic equipment, which includes display screen and above-mentioned shading foam
Adhesive tape, and shading foam tape is attached to the back side of display screen.
Since above-mentioned shading foam tape has micro-structure, thus the electronic equipment containing above-mentioned shading foam tape makes
Used time, incident light side with micro-structure from shading foam tape are injected, by means of the refraction action of micro-structure, can be pressed down
Make above-mentioned incident light and enter display screen through shading foam tape, so as to fulfill the effect of display screen contrast is improved.
Preferably above-mentioned electronic equipment is mobile phone.
The application is described in further detail below in conjunction with specific embodiment, these embodiments are it is not intended that limit this
Apply for scope claimed.
The performance of shading foam tape in embodiment is tested using following methods：
Mist degree and transmission measurement are carried out using the haze meter of model NDH2000, and test establishing criteria is JIS7136；
25% compression ratio is tested：Carried out using tensilon, test establishing criteria is JIS K6254.
Density measurement：Carried out using balance, test establishing criteria is ASTM D3574.
180 DEG C of peel test force methods are：Carried out using tensilon, test establishing criteria is GBT-2792-2014.
Embodiment 1
The preparation method of shading foam tape as described in Figure 1 is as follows：
(1) preparation of shading glue belt 10：
It is 30 μm to select quantity for spray, microprism mother's film of depth 10um, then using crack coating method, in above-mentioned master mold
Upper coating mould release (silicone oil), is made master mold of the off-type force in 10g or so.
The first pressure sensitive adhesive is coated with above-mentioned release film layer 11, forms the first pressure-sensitive adhesive layer 20；
It is bonded, and goes with 12 μm of substrate layer 13 (black PET) on the surface of remote micro-structure of the first pressure-sensitive adhesive layer 20
Except microprism master mold.
In having on body structure surface for the first pressure-sensitive adhesive layer 20,23 μm of release film layer 11 is sticked, obtains having structured screening
Optical cement belt 10.
(2) preparation of foamed cotton layer 30：
Polyethylene particle is divided into first part, second part and the 3rd part, is denoted as polyethylene particle A, polyethylene particle B successively
And polyethylene particle C；Foaming master batch：Polyethylene particle A and polyurethane particles are subjected to the first mixing process, it is female to obtain foaming
Grain, wherein, the weight ratio of polyethylene particle A and polyurethane particles is 1:1；
Polyethylene particle B, carbon nanotubes and azodicarbonamide are subjected to the second mixing process, obtain auxiliary agent master batch, its
In, the weight ratio of polyethylene particle B, carbon nanotubes and azodicarbonamide are 100:1:1；
Foaming master batch, auxiliary agent master batch and polyethylene particle C are blended, master slice is made, wherein, foaming master batch, auxiliary agent
The weight ratio of master batch and polyethylene particle C are 1:0.2:2；Master slice is irradiated by gamma-rays, foamed cotton layer 30, irradiation is made
Measure as 50kGy；And sided corona treatment is carried out to above-mentioned foamed cotton layer 30, it is stand-by.
(3) preparation of shading foam tape：
Using the mode of slot coated, the second pressure sensitive adhesive is coated with shading glue belt 10, forms the second pressure-sensitive adhesive layer 12.
Second pressure-sensitive adhesive layer 12 is bonded with foamed cotton layer 30, obtains final shading foam tape.
After after tested, mist degree 99.9%；Light transmittance is 0.1%；Density is 0.55g/cm3；25% compression ratio is
0.02MPa；180 ° of peeling forces (sus 304) are 800gf.
Embodiment 2
With being distinguished as embodiment 1：The weight ratio of polyethylene particle A and polyurethane particles is 0.5:1.
After after tested, mist degree 99.4%；Light transmittance is 0.2%；Density is 0.25g/cm3；25% compression ratio is
0.01MPa；180 ° of peeling forces (sus 304) are 800gf.
Embodiment 3
With being distinguished as embodiment 1：The weight ratio of polyethylene particle A and polyurethane particles is 3：1.
After after tested, mist degree 99.6%；Light transmittance is 0.09%；Density is 0.60g/cm3；25% compression ratio is
0.025MPa；180 ° of peeling forces (sus 304) are 800gf.
Embodiment 4
With being distinguished as embodiment 1：The weight ratio of polyethylene particle B, the carbon nanotubes and azodicarbonamide is
100：1:2.
After after tested, mist degree 99.1%；Light transmittance is 0.2%；Density is 0.24g/cm3；25% compression ratio is
0.015MPa；180 ° of peeling forces (sus 304) are 800gf.
Embodiment 5
With being distinguished as embodiment 1：The weight ratio of polyethylene particle B, carbon nanotubes and azodicarbonamide are 100:1:
1。
After after tested, mist degree 99.7%；Light transmittance is 0.09%；Density is 0.58g/cm3；25% compression ratio is
0.035MPa；180 ° of peeling forces (sus 304) are 800gf.
Embodiment 6
With being distinguished as embodiment 1：The weight ratio of foaming master batch, auxiliary agent master batch and polyethylene particle C is 2:1:2.
After after tested, mist degree 98.1%；Light transmittance is 0.2%；Density is 0.20g/cm3；25% compression ratio is
0.005MPa；180 ° of peeling forces (sus 304) are 800gf.
Embodiment 7
With being distinguished as embodiment 1：The weight ratio of foaming master batch, auxiliary agent master batch and polyethylene particle C is 1:0.3:2.
After after tested, mist degree 99.8%；Light transmittance is 0.09%；Density is 0.54g/cm3；25% compression ratio is
0.018MPa；180 ° of peeling forces (sus 304) are 800gf.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
Comparing embodiment 1 to 3 is understood, the weight ratio of polyethylene particle A and polyurethane particles is excellent to be limited to the application
Be conducive to improve the comprehensive performance of shading foam tape in the range of choosing.
Comparing embodiment 1,4 and 5 is understood, by polyethylene particle B, the carbon nanotubes and foaming agent (azodicarbonamide)
Weight ratio be limited to be conducive in the preferable scope of the application improve shading foam tape comprehensive performance.
Embodiment 1,6 and 7 is understood, the weight ratio of foaming master batch, auxiliary agent master batch and polyethylene particle C is limited to this Shen
It please preferably be conducive to improve the comprehensive performance of shading foam tape in scope.
In conclusion be conducive to improve display screen contrast using the shading foam tape that the application provides；Compare at the same time
In existing shading rubber belt, the shading foam tape that the application provides also has the advantages that to be easy to paste and heavy industry is good.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of shading foam tape, it is characterised in that the shading foam tape includes：
Shading glue belt (10), is provided with multiple micro-structures on a side surface of the shading glue belt (10)；
First pressure-sensitive adhesive layer (20), first pressure-sensitive adhesive layer (20) are arranged on the remote described micro- of the shading glue belt (10)
The surface of structure side；And
Foamed cotton layer (30), the foamed cotton layer (30) are arranged on first pressure-sensitive adhesive layer (20) away from the shading glue belt (10)
The surface of side.
2. shading foam tape according to claim 1, it is characterised in that the shading glue belt (10) includes：
Second pressure-sensitive adhesive layer (12), a side surface of second pressure-sensitive adhesive layer (12) are provided with multiple micro-structures；And
Substrate layer (13), the substrate layer (13) are arranged on close first pressure-sensitive adhesive layer of second pressure-sensitive adhesive layer (12)
(20) side.
3. shading foam tape according to claim 1 or 2, it is characterised in that the micro-structure is arc groove or column rib
Mirror；
Preferably, on the direction of the shading glue belt (10), the height of the micro-structure is 8~12 μm.
4. shading foam tape according to claim 3, it is characterised in that the micro-structure is in first pressure-sensitive adhesive layer
(20) it is arranged in array on surface.
5. shading foam tape according to any one of claim 1 to 3, it is characterised in that the foamed cotton layer (30) by
Foaming concentrate, aid master batches and the irradiated crosslinking of polyethylene are prepared；
Wherein, the foaming concentrate is prepared by thermoplastic polyurethane and polyethylene；The aid master batches are by polyethylene, impedance
Reinforcing aids and foaming agent are prepared；
Preferably, the impedance reinforcing aids includes the one or more in activated carbon, graphite, graphene and carbon nanotubes.
6. shading foam tape according to claim 2, it is characterised in that form the method bag of the foamed cotton layer (30)
Include：
Polyethylene particle includes polyethylene particle A and polyethylene particle C；
The polyethylene particle A and polyurethane particles are subjected to the first mixing process, obtain foaming master batch；
The foaming master batch and the polyethylene particle C are blended, master slice is made；
The master slice is irradiated by gamma-rays, foam is made；And
The foam is fitted in the side of remote first pressure-sensitive adhesive layer (20) of the substrate layer (13), forms the bubble
Cotton layer (30).
7. shading foam tape according to claim 6, it is characterised in that the method for forming the master slice further includes：
The polyethylene particle further includes polyethylene particle B；
The polyethylene particle B, impedance reinforcing aids and foaming agent are subjected to the second mixing process, obtain auxiliary agent master batch；
The foaming master batch, the auxiliary agent master batch and the polyethylene particle C are blended, the master slice is made；
Preferably, the impedance reinforcing aids includes the one or more in activated carbon, graphite, graphene and carbon nanotubes.
A kind of 8. preparation method of the shading foam tape any one of claim 1 to 7, it is characterised in that the system
Preparation Method includes：
Prepare master mold, the surface of the master mold is convex-concave surface；
Coat pressure sensitive adhesive on the surface of the master mold, form the second pressure-sensitive adhesive layer (12), second pressure-sensitive adhesive layer (12) with
The surface that the master mold is in contact is formed with multiple micro-structures；
Surface of second pressure-sensitive adhesive layer (12) away from the master mold side is bonded with substrate layer (13), described in removal
After master mold, the shading glue belt (10) is obtained；
Foamed cotton layer (30) is formed in the side of remote second pressure-sensitive adhesive layer (12) of the substrate layer (13), and then forms institute
State shading foam tape.
9. preparation method according to claim 8, it is characterised in that carry out second pressure sensitive adhesive coating step it
Before, the preparation method also includes the coating release agent on the surface of the master mold；Preferably, the mould release is selected from silicone oil.
10. preparation method according to claim 8 or claim 9, it is characterised in that the step of forming the foamed cotton layer (30) is wrapped
Include：
Polyethylene particle includes polyethylene particle A and polyethylene particle C；
The polyethylene particle A and polyurethane particles are subjected to the first mixing process, obtain foaming master batch；
The foaming master batch and the polyethylene particle C are blended, master slice is made；
The master slice is irradiated by gamma-rays, foam is made；And
The foam is fitted in the side of remote first pressure-sensitive adhesive layer (20) of the substrate layer (13), forms the bubble
Cotton layer (30)；
Preferably, the irradiation of the radiation treatment process is 40~60kGy；
Preferably, the weight ratio of the polyethylene particle A and the polyurethane particles is 1~5:1.
11. preparation method according to claim 10, it is characterised in that the polyethylene particle further includes polyethylene particle
B, the step of preparing the master slice, further include：
The polyethylene particle B, impedance reinforcing aids and foaming agent are subjected to the second mixing process, obtain auxiliary agent master batch；
The foaming master batch, the auxiliary agent master batch and the polyethylene particle C are blended, the master slice is made；
Preferably, the weight ratio of the polyethylene particle B, the impedance reinforcing aids and the foaming agent are 100:(0.5-1):
(0.8-1.2)；
Preferably, the weight ratio of the foaming master batch, the auxiliary agent master batch and the polyethylene particle C is 1:(0.2~0.5):
(1~5)；
Preferably, the impedance reinforcing aids includes the one or more in activated carbon, graphite, graphene and carbon nanotubes.
12. preparation method according to claim 11, it is characterised in that after radiation treatment process is carried out, the system
Preparation Method further includes：Sided corona treatment is carried out to the master slice after the radiation treatment, obtains the foam.
13. preparation method according to claim 12, it is characterised in that the foam is fitted in the substrate layer (13)
Remote second pressure-sensitive adhesive layer (12) side the step of include：Remote described second in the substrate layer (13) is pressure-sensitive
The side coating pressure sensitive adhesive of glue-line (12), forms the first pressure-sensitive adhesive layer (20)；In the remote institute of first pressure-sensitive adhesive layer (20)
The side for stating the second pressure-sensitive adhesive layer (12) is bonded the foam, forms the foamed cotton layer (30).
14. a kind of electronic equipment, it is characterised in that the electronic equipment includes any one of display screen and claim 1 to 7 institute
The shading foam tape stated, and the shading foam tape is attached to the back side of the display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466374.2A CN108034383A (en) | 2017-12-28 | 2017-12-28 | Shading foam tape, its preparation method and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466374.2A CN108034383A (en) | 2017-12-28 | 2017-12-28 | Shading foam tape, its preparation method and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108034383A true CN108034383A (en) | 2018-05-15 |
Family
ID=62097865
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|---|---|---|---|
| CN201711466374.2A Pending CN108034383A (en) | 2017-12-28 | 2017-12-28 | Shading foam tape, its preparation method and electronic equipment |
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