CN207918756U - Ultrathin full shading double-sided pressure-sensitive adhesive tape and its coiled material product - Google Patents
Ultrathin full shading double-sided pressure-sensitive adhesive tape and its coiled material product Download PDFInfo
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- CN207918756U CN207918756U CN201721788292.5U CN201721788292U CN207918756U CN 207918756 U CN207918756 U CN 207918756U CN 201721788292 U CN201721788292 U CN 201721788292U CN 207918756 U CN207918756 U CN 207918756U
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- Prior art keywords
- adhesive tape
- sensitive adhesive
- thickness
- pressure sensitive
- adhesion coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—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
-
- 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
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/41—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the carrier layer
Abstract
The utility model is related to a kind of ultrathin full shading double-sided pressure-sensitive adhesive tape and its coiled material products, and specifically, there are one black PET material layer and the first pressure sensitive adhesive adhesion coatings and the second pressure sensitive adhesive adhesion coating that are set in its positive and negative main surface for adhesive tape tool.The black PET material layer thickness is 12~20 microns and the overall thickness of the adhesive tape is 15~400 microns, and overall thickness standard deviation≤1 micron of the adhesive tape.The adhesive tape of the utility model particularly suitable as shading double-sided pressure-sensitive adhesive tape, for producing all kinds of different products, especially electronic product.
Description
Technical field
The utility model is related to mucilage materials fields, relate more specifically to ultrathin full shading double-sided pressure-sensitive adhesive tape and its volume
Material product.
Background technology
In industrial age, contact adhesive (PSA) band (i.e. pressure sensitive adhesive tape) is widely used processing auxiliary.
For purposes in the electronics industry, very strict demand is proposed to PSA tape.It is required that they show it is small
It degasification performance and can use over a wide temperature range, show low manufacturing tolerance, and true for extremely low overall thickness
Protect high adhesion strength.
Especially with the miniaturization and slimming of electronic product, higher is proposed for shading double-sided pressure-sensitive adhesive tape and is wanted
It asks.For example, the fixation of back light unit in the shell usually needs to use double faced adhesive tape.
Currently, usually used black double-sided pressure-sensitive adhesive band structure is often with there are many disadvantages.For example, nearly all existing
Shading double-sided pressure-sensitive adhesive tape use the psa layer containing black dyes, or print carrier layer using black dyes
Brush, is then arranged psa layer again in printing layer.However, these printing layers are commonly present non-uniform situation.In addition, black dyes
Usually unstable (stability is often 1 year or shorter), and in use, often shift or be transferred to adhesion material
On, to influence performance.
In order to meet the performance indicators such as shading performance, bonding force and flatness, current existing shading double-sided pressure-sensitive
The overall thickness of band is at least 30 microns or thicker.Further, since existing shading double-sided pressure-sensitive adhesive tape has higher thickness public
Difference, and shaded effect is inhomogenous.
For example, prior art one kind black PSA adhesive tapes use Cr+Azo dyes, therefore dyestuff is not only possible causes to gather
Collection, and dyestuff is possible to be transferred to substrate.
Therefore, there is an urgent need in the art to develop it is new, with better shading performance, lower overall thickness and with excellent
The shading double-sided pressure-sensitive adhesive tape of mechanical performance and excellent stability.
Invention content
The purpose of this utility model is just to provide a kind of with better shading performance, lower overall thickness and with excellent
The shading double-sided pressure-sensitive adhesive tape of mechanical performance and excellent stability.
In a first aspect, the utility model provides a kind of ultrathin full shading double-sided pressure-sensitive adhesive tape, the adhesive tape packet
The structure sheaf being laminated from top to bottom is included, the structure sheaf includes：
(a) the first pressure sensitive adhesive adhesion coating, thickness a1；
(b) black PET material layer, thickness b；
(c) the second pressure sensitive adhesive adhesion coating, thickness a2；
Wherein, a main surface of the black PET material layer is bonded with the first pressure sensitive adhesive adhesion coating, and described
Another main surface of black PET material layer bonded with the second pressure sensitive adhesive adhesion coating；
Also, the thickness b of the black PET material layer be the sum of 12~20 microns and the a1+b+a2 be 15~
400 microns, and overall thickness standard deviation≤1 micron of the adhesive tape.
In another preferred example, overall thickness standard deviation≤0.5 micron of the adhesive tape.
In another preferred example, the overall thickness of the adhesive tape is 20~100 microns.
In another preferred example, the overall thickness of the adhesive tape is 20~50 microns.
In another preferred example, the black PET material layer thickness is 15~20 microns.
In another preferred example, the black PET material layer thickness is 15~18 microns.
In another preferred example, the first pressure sensitive adhesive adhesion coating is the PSA material layer that thickness is 1~6 micron.
In another preferred example, the first pressure sensitive adhesive adhesion coating is the PSA material layer that thickness is 2~4 microns.
In another preferred example, the second pressure sensitive adhesive adhesion coating is the PSA material layer that thickness is 1~6 micron.
In another preferred example, the second pressure sensitive adhesive adhesion coating is the PSA material layer that thickness is 2~4 microns.
In another preferred example, the first pressure-sensitive adhesive layer thickness is identical as the second pressure-sensitive adhesive layer thickness.
In another preferred example, the first pressure-sensitive adhesive layer thickness is differed with the second pressure-sensitive adhesive layer thickness.
In another preferred example, the first pressure sensitive adhesive adhesion coating and the second pressure sensitive adhesive adhesion coating are transparent.
In another preference, the full shading of the adhesive tape.
In another preferred example, the outer surface of the first pressure sensitive adhesive adhesion coating is equipped with the first peeling layer；And/or it is described
The outer surface of second pressure sensitive adhesive adhesion coating is equipped with the second peeling layer.
In another preferred example, the adhesive tape further includes the first peeling layer and/or the second peeling layer, the described first stripping
Absciss layer is compound or is covered in the outer surface of the first pressure sensitive adhesive adhesion coating, and second peeling layer is compound or to be covered in second pressure-sensitive
The outer surface of adhesive layer.
In another preferred example, first peeling layer and/or the second peeling layer are same peeling layer.
In another preferred example, directly viscous in the peeling layer and the first pressure sensitive adhesive adhesion coating and/or two pressure sensitive adhesive adhesion coatings
It closes.
In another preferred example, the adhesive tape is coiled material product, articles of sheet material.
In another preferred example, the black PET material layer is the PET film layer using carbon black as filler.
In another preferred example, the adhesive tape is equipped with a core, and the adhesive tape forms coiled material product around the core.
In the second aspect of the utility model, a kind of coiled material product is provided, the coiled material product includes：
One core,
And the full shading double-sided pressure-sensitive adhesive tape of ultrathin type described in the utility model first aspect around the core.
In another preferred example, the breadth of the coiled material is 0.5~2.5 meter.
In another preferred example, the length of the coiled material is 2~2000 meters, preferably 5~500 meters.
It should be understood that in the scope of the utility model, above-mentioned each technical characteristic of the utility model and below (such as implementation
Example) in specifically describe each technical characteristic between can be combined with each other, to form a new or preferred technical solution.It is limited to
Length, not repeated them here.
Description of the drawings
Fig. 1 shows the structure of the full shading double-sided pressure-sensitive adhesive tape of the ultrathin type in the utility model one embodiment, wherein
Peeling layer is omitted.
Fig. 2 shows the structure of the full shading double-sided pressure-sensitive adhesive tape of the ultrathin type in another embodiment of the utility model, wherein
Display is located at the peeling layer on the first pressure sensitive adhesive adhesion coating A1.
Fig. 3 shows the structure of the full shading double-sided pressure-sensitive adhesive tape of the ultrathin type in another embodiment of the utility model, wherein
Display is located at the first peeling layer on the first pressure sensitive adhesive adhesion coating A1 and the second peeling layer on the second pressure sensitive adhesive adhesion coating A2.
In each figure, mark is as follows：
11：First pressure sensitive adhesive adhesion coating；
12：Black PET material layer；
13：Second pressure sensitive adhesive adhesion coating；
14：First peeling layer；
15：Second peeling layer.
Specific implementation mode
The present inventor after extensive and in-depth study, it is two-sided to develop a kind of full shading of the ultrathin type of structure novel for the first time
Pressure sensitive adhesive tape.The utility model can be made and still have under ultrathin it was unexpectedly observed that by adding the inorganic fillers such as carbon black
There is the carrier film of high shading rate.After the pressure sensitive adhesive adhesion coating of the ultrathin carrier film and specific thicknesses is compound, it can be made
Screening with excellent shading performance, extremely low overall thickness, excellent overall thickness standard deviation, excellent mechanical properties and excellent stability
Light double-sided pressure-sensitive adhesive tape.The utility model is completed on this basis.
Term
As used herein, " adhesive tape of the utility model ", " the full shading double-sided pressure-sensitive adhesive tape of ultrathin type of the utility model ",
" pressure sensitive adhesive tape of the utility model " etc. is used interchangeably, and the full shading of ultrathin type referred to described in the utility model first aspect is double
Face pressure sensitive tape.
In the present invention, for convenience, term " top ", " lower section ", " left side " or " right are used
Side ".It should be understood that these position relationships are opposite, additional restriction is not made to the scope of protection of the utility model.
As used herein, term " PSA " refers to pressure sensitive adhesives, and Chinese is pressure sensitive adhesive or pressure
Sensitive adhesive.
As used herein, term " PET " refers to polyethylene terephthalate (English：Polyethylene
terephthalate)。
Ultrathin full shading double-sided pressure-sensitive adhesive tape
The utility model provides a kind of ultrathin full shading double-sided pressure-sensitive adhesive tape comprising carrier layer, and stacking
Pressure sensitive adhesive adhesion coating in two main surfaces of the carrier layer.
Typically, the full shading double-sided pressure-sensitive adhesive tape of ultrathin type of the utility model include from top to bottom it is stacked together with
Under each layer：
(a) the first pressure sensitive adhesive adhesion coating A1, thickness a1；
(b) black PET material layer B, thickness b；
(c) the second pressure sensitive adhesive adhesion coating A2, thickness a2；
Wherein, a main surface of the black PET material layer is bonded with the first pressure sensitive adhesive adhesion coating, and described
Another main surface of black PET material layer bonded with the second pressure sensitive adhesive adhesion coating.
One feature of the utility model, which is the black PET material layer thickness b, not only has excellent light-proofness, but also tool
It is usually 12~20 microns to have very thin thickness, b.
Another feature of the utility model is the overall thickness pole of the ultrathin full shading double-sided pressure-sensitive adhesive tape of the utility model
It is low, usually 15~400 microns.
In the present invention, the thickness of adhesive tape is the thickness of carrier layer (i.e. black PET material layer), two psa layers
Thickness and it is suitable when, other layers of the sum of thickness being optionally present.Preferably, in the present invention, the a1+b
The sum of+a2 is 15~400 microns.
In a preferred embodiment, especially in the case of three layers of adhesive tape, the layer thickness b's and PSA of carrier
The difference of the sum of layer thickness (a1 and a2) is not more than 25 microns, highly preferably less than 20 microns, more preferably less than 18 microns.
Another feature of the utility model is the total thickness scale of the ultrathin full shading double-sided pressure-sensitive adhesive tape of the utility model
Quasi- deviation very little, usually≤1 micron, preferably≤0.5 micron, more preferably≤0.2 micron.
Black PET material layer
In the present invention, for membrane carrier layer, all film-shaped polymer carriers can be used in principle, wherein in institute
It states and mixes the inorganic fillers such as carbon black in film-shaped polymer carrier.
Typically, in the present invention, polyethylene, polypropylene, polyether sulfone, polyamides can be used in suitable carrier layer
Amine, polyimides, polyetherimide, polyester, polyphenylene sulfide, polyamidoimide, polyetherimide, polymethacrylates,
Film, makrolon, polyether-ketone, poly- aryl (polyaryls), polyurethane, polyacrylate, the poly- butyral of styrene-based
(polybutyrals), polyethylene -- vinyl acetate, polyethylene naphthalate and fluorinated polymer.Can individually or
Person uses the polymer of these types in a manner of being combined with each other.A kind of particularly preferred method uses polyester film, particularly preferably
PET film (polyethylene terephthalate film).
From the point of view of the advantageous application of the utility model, PET film has high tensile strength and very good thickness public
Difference.At this moment, by using more and more thinner film, absolute thickness tolerance has obtained more and more improvement.
Preferably, the membrane carrier layer of the utility model is little or free of any dyestuff or other pigment, especially not
Contain any organic dyestuff.
In the present invention, a highly preferred scheme is only to be filled with black inorganic pigment.In this practicality
In novel, graphite, carbon black or similar carbon compound are particularly suitable.By using different loadings, transparency can be adjusted (thoroughly
Luminosity) and film black level.
By taking the black PET material layer of the utility model as an example, it has the characteristics that：1. compared with printing film, nothing is waved
Hair property organic compound；2. better distribution of color, high uniformity；3. inhomogenous without pattern caused by printing；4. higher
Photoresist (blackness)；5. carbon black etc. not will produce the problems such as migration, aggregation, therefore stability is high；6. more environmentally friendly.
Pressure sensitive adhesive adhesion coating
Another primary structure in the ultrathin full shading double-sided pressure-sensitive adhesive tape of the utility model is pressure sensitive adhesive adhesion coating (PSA
Material layer).
In the present invention, include (but and unlimited as the pressure-sensitive adhesive (PSA) of pressure sensitive adhesive adhesion coating main component
In)：Acrylic vinegar, natural rubber, synthetic rubber, organosilicon and/or EVA adhesive.
In the present invention, the special advantage that transparent PSA has, because it is free of any pigments or dyes, because
This avoids the risk that pigments or dyes are transferred to other materials.
Preferably, in order to improve the adherence of PSA, black PET material layer can also be pre-processed, for example, etching,
The pretreatments such as corona or plasma.
In the present invention, the thickness of adhesive phase is not particularly limited, if its meet the requirement of adhesive property with
And the overall thickness requirement of the utility model adhesive tape.
In general, the thickness of adhesive phase can influence the adhesion strength of double faced adhesive tape.Advantageously, the scheme used makes glue
The adhesion strength of band is sufficient to specific final use, in electronic building brick more specifically in a manner of described in this specification
Application.For this purpose, it is very advantageous that adhesive phase is at least 0.5 micron of thickness, preferably respectively 1 in each case
Micron is thick.
Psa layer positioned at both sides can be advantageously identical.Alternatively, depending on application, the first and second psa layers can also have
It is sharply different from each other.More specifically, being different in terms of their layer thickness and/or their chemical composition.With this side
Formula, such as different adhesiveness can be set.PSA systems particularly preferred for the utility model double-sided pressure-sensitive adhesive tape are propylene
Acid esters adhesive, caoutchouc adhesive, synthetic rubber binder, silicone adhesive or EVA adhesives.
But, however, it is also possible to use every other PSA well known by persons skilled in the art is [about the prior art, ginseng
See " pressure-sensitive adhesive technical manual (the Handbook ofPressure Sensitive of such as Bonatas Satas
Adhesive Technology) " (van Nostranb, New York 1989)].
For caoutchouc adhesive, it is not less than about 100000 dongles that natural rubber, which is worn into molecular weight (weight average),
, preferably not less than 500 000 dalton, and add additive (additized).
In the case where rubber/synthetic rubber is as adhesive raw material, there is a possibility that widely to change.It can use
Natural rubber or synthetic rubber, or any desired blend of natural rubber and/or synthetic rubber can be used, according to institute
The purity level and viscosity grade needed, however, it would be possible to one or more of natural rubbers, example are selected from all existing grades
Such as RSS, ADS, TSR or CV type, and can be from SBR styrene butadiene rubbers (SBR), the butadiene rubber of random copolymerization
(BR), synthetic polyisoprenes (IR), butyl rubber (IIR), halogenated butyl rubber (XIIR), acrylic rubber (ACM), second
One or more of synthetic rubber are selected in alkene-vinyl acetate copolymer (EVA) and polyurethane and/or its blend.
It is further preferred that in order to improve the processing performance of rubber, can add thereto with elastomer total amount weight calculation amount
Content is the thermoplastic elastomer (TPE) of 10~50wt%.As representative, especially compatible styrene-can be specifically referred in this respect
Isoprene styrene (SIS) and s-B-S (SBS) type.
, it is preferable to use (methyl) acrylate PSA is (for this explanation in a kind of preferred embodiment of the utility model
The purpose of book, the term include the PSA based on polyacrylate and/or polymethacrylates).
Monomer is preferably chosen so that obtained polymer can be used as PSA under room temperature or higher temperature.More
Body, for the purposes as PSA, select point rate of corresponding monomer make the glass transition temperature (Tg) of polymerizate≤
15℃.Preferably select the monomer so that obtained polymer can be used as PSA, the polymerization more specifically obtained in room temperature
Object have according to " the pressure-sensitive adhesive technical manual " of Bonatas Satas (van Nostranb, New York 1989,
P444-541 contact adhesive property).From the dynamic glass transition temperature of amorphous system and the melting of semi-crystalline systems
For in the sense that temperature, form the glass transition temperature of the polymer on PSA bases advantageously lower than 15 DEG C, this can by
Low-frequency dynamic mechanical analysis (DMA) measures.
In another embodiment of the utility model, the comonomer is selected to form so that the PSA can be used as heat
Activable PSA.More specifically, the application of PSA (or hotmelt) can be activated for heat, in other words, for only existing
The substance for becoming viscosity when heating, selects point rate of monomer so that the glass transition temperature (Tg) of copolymer is 15 DEG C to 100
DEG C, it is preferably 30 DEG C to 80 DEG C, 40 DEG C to 60 DEG C more preferable (from the dynamic glass transition temperature and hypocrystalline of amorphous system
For in the sense that the melting temperature of system), this can be by measuring at low-frequency dynamic mechanical analysis (DMA).
Can be preferably by making monomer mixture polymerization obtain polymer, the monomer mixture is by acrylate and/or first
Base acrylate and/or its free acid composition, have formula CH2=CH (R1)(COOR2), wherein R1For H or CH3And R2To have
The alkyl chain or H of 1~20 carbon atom.
The molal weight Mw of polyacrylate used is preferably that Mw >=200000g/mol (is surveyed by gel permeation chromatography
It is fixed).
In a kind of highly preferred scheme, acrylic compounds or methacrylic monomer are used comprising have containing 4~
The acrylate and methacrylate of 14 carbon atoms, the preferably alkyl containing 4~9 carbon atoms.It is not intended to be enumerated limit by this
System, such as methyl acrylate, methyl methacrylate, ethyl acrylate, n-butyl acrylate, n-BMA, third
The positive heptyl ester of olefin(e) acid n-pentyl ester, the just own ester of acrylic acid, acrylic acid, n-octyl, n octyl methacrylate, the positive nonyl of acrylic acid
Ester, lauryl acrylate, stearyl acrylate, behenyl base ester and its branched isomers, such as acrylic acid are different
Butyl ester, 2-EHA, 2-Ethylhexyl Methacrylate, Isooctyl acrylate monomer and isooctyl methacrylate.
Other class compounds that can be used are the simple function propylene for the bridging cycloalkyl alcohol being made of at least six carbon atom
Acid esters and/or methacrylate.The cycloalkyl alcohol can also be replaced by such as C1-C6 alkyl, halogen atom or cyano.
It is the group such as carboxyl, sulfonic acid and phosphonic acid base, hydroxyl, interior using the monomer with polar group in a kind of scheme
Amide and lactone, N substituted amide, N- substitutions amine, carbamate, epoxy, mercaptan, alkoxy or cyano, ether etc..
The monomer of moderate alkaline is, for example, N, the substituted amide of N- dialkyl group-, such as N,N-DMAA, N, N-
Dimethacrylamide, N- tert-butyls acrylamide, n-vinyl pyrrolidone, N- vinyl lactams, methacrylic acid two
Methylamino ethyl ester, acrylate, diethyl aminoethyl methacrylate, acrylic acid diethylamino second
Ester, N hydroxymethyl acrylamide, N- (butoxymethyl) Methacrylamide, N hydroxymethyl acrylamide, N- ((ethoxymethyl)s
Base) acrylamide, n-isopropyl acrylamide, this enumerates not exhaustive.
To be further improved, resin can be mixed into PSA.As the tackifying resin of addition, can use previously known
And all tackifier resins described in the literature.It can be mentioned that representative include pinene resin, indene resin and rosin, it
Disproportionation, hydrogenation, polymerization and esterification derivative and its salt, aliphatic series and aromatic hydrocarbon resin, terpene resin and terpene-phenolic tree
Fat further includes C5, C9 and other hydrocarbon resins.In order to adjust as requested gained adhesive performance, can use these and
Any desired combination of other resins.Usually, (solvable) any tree compatible with the polyacrylate can be used
Fat：Specifically, it can be mentioned that all aliphatic series, aromatics and alkyl aromatic hydrocarbon resin, the hydrocarbon resin based on pure monomer, hydrogenate hydrocarbon tree
Fat, functionalized hydrocarbon resin and natural resin.It especially can refer to " the pressure-sensitive adhesive technical manual of Donatas Satas
Knowing in (Handbook of Pressure SensitiveAdhesive Technology) " (van Nostrand, 1989)
The introduction of knowledge situation.
In the present invention, similarly, it is preferable to use the transparent resin compatible with high polymer improves transparency.
Hydrogenation or partially hydrogenated resin often have these performances.
Furthermore it is possible to which it is (such as fiber, carbon black, zinc oxide, chalk, solid or empty optionally to add plasticizer, other fillers
Microballon, silica, silicate made of heart bead, other materials), nucleating agent, conductive material (mix by such as conjugated polymer
Miscellaneous conjugated polymer, metallic pigments, metallic particles, metal salt, graphite etc.), swelling agent, compounding agent and/or antiaging agent, should
Antiaging agent is added in the form of such as main anti-oxidant and auxiliary antioxidant or in the form of light stabilizer.
Preferably, select the average molecular weight Mw of the PSA formed in free radical polymerization so that it is in 200000-
In the range of 4000000g/mol；Especially for for the further purposes of the utility model, obtained average molecular weight Mw is
The PSA of 400000~1400000g/mol.Mass Distribution can also be bimodal or multimodal.Average molecular weight is by size exclusion
Chromatography (GPC) measures.
Barrier liner
The adhesive tape of the utility model can also further contain peeling layer (i.e. barrier liner)
In the present invention, barrier liner can be equipped on side or both sides in the two-sided psa layer.The isolation liner
Pad prevent when by tape roll around when psa layer stick to each other.For the purposes of the utility model of double-side PSA tape, the barrier liner
It should put down as far as possible.Therefore, the barrier liner based on polymer film, paper, textile material and/or metal foil can be used.It can make
The example of paper includes glassine paper or " " (kaolin coats) paper of clay coated.The thickness of base material is preferably 10
To 500 microns, next processing technology is depended on.
In a kind of highly preferred embodiment, the base material for barrier liner is polymer film.These can example
Such as it is based on polyethylene, polypropylene, polyether sulfone, polyamide, polyimides, polyetherimide, polyester, polyphenylene sulfide, polyamide acyl
Imines, polyetherimide, polymethacrylates, the film of styrene-based, makrolon, polyether-ketone, poly- aryl, polyurethane,
Polyacrylate, poly- butyral, polyethylene -- vinyl acetate or polyethylene naphthalate.The polymer film can be pine
It is relaxing or being either uniaxially or biaxially oriented.
From the point of view of the manufacture of double-side PSA tape, it is particularly preferably based on the polyester of polyethylene terephthalate (PET)
Film.
For isolation features, which can further be arranged at least one layer of barrier coat.Barrier coat is preferably based on organic
Silicon, fluorinated organosilicon or fluorinated polymer.Compound based on long aliphatic chain can be used as the barrier coat.
Preparation method
The utility model additionally provides the method for preparing the utility model adhesive tape.
PSA is applied to from solution in a kind of preferred embodiment in order to prepare ultrathin full shading double-sided pressure-sensitive adhesive tape
On the specific pet vector material of the utility model.In principle, also the adhesive can be applied from melt, but this can lead to adhesive tape
There is higher thickness deviation.
In order to be coated from melt, which may must remove solvent from PSA.In this case, in principle
Any technology well known by persons skilled in the art can be used.A kind of highly preferred technology is to use single screw rod or twin-screw extrusion
The technology of machine concentration.Double screw extruder can in the same direction or reverse operating.It is preferred that in two or more vacuum zone distilling off solvent
Or water.It is also inversely heated according to the vapo(u)rizing temperature of solvent.Remaining solvent content amounts to preferred ＜ 1%, more preferable ＜
0.5%, and very preferably ＜ 0.2%.The further processing of hot melt is carried out from the melt.
In order to be coated with as hot melt, different coating methods may be used.In a kind of scheme, it is coated with by rolling method
PSA.In another arrangement, it is coated by melt die head.In further preferred scheme, applied by squeezing out
Cloth.It is extrusion coated to carry out that it is preferable to use extrusion dies.
Extrusion die used advantageously can come from one of following three type：T- die heads, fish tail die head and rack-style
Die head.Difference lies in its runner design differences for these types.
By coating, PSA can also be made to be orientated.
In addition, PSA may must be crosslinked.In a kind of preferred embodiment, hot friendship is carried out with electron beam and/or UV radiation
Connection.
According to UV photoinitiators used, UV crosslinkings are carried out with the short wavelength UV irradiation that wave-length coverage is 200~400nm and are shone
It penetrates；Specifically, it is irradiated with the high pressure or middle medium pressure mercury lamp that output power is 80~240W/cm.Exposure intensity is adapted to UV
The corresponding quantum yield of photoinitiator and set crosslinking degree.
In addition, in a kind of Favourable implementations, PSA can be crosslinked with electron beam.What can favorably be used is typical
Irradiation apparatus includes line cathode system, scanner system and segmented cathode system (segmented cathode system),
Wherein use electron-beam accelerator.In Skelhorne, ElectronBeam Processing, in Chemistry
AndTechnology of UV and EB formulation forCoatings, Inks and Paints, Vol.1,
The detailed description of the technical field and most important technological parameter are given in 1991, SITA, London.Typical accelerating potential
It is set between 50kV~500kV, between preferably 80kV~300kV.The range of dispersion amount (scatter dose) used is 5
Between~150kGy, specifically between 20~100kGy.CN 101679814B specifications page 1413/19 can also and use this
Two kinds of cross-linking methods or other can be in the method for high-energy irradiation.
In a kind of highly preferred scheme, adhesive is coated from solution.In this case, it can be used very not
Same painting method.Coating herein can also carry out from die head, either by scraper applicator or by spraying or passing through roller
Applicator (roll applicator), or carried out by printing.Spraying method is particularly suitable to for very thin coating
Or method of roll coating.By carrying out higher dilution with solvent, improve the thickness deviation of coating, this is because solvent is then steamed
Hair falls.By this method, the thickness deviation of specific applicator assembly is determined by this mechanism.When coating is carried out from solution, for
The PSA film coated from solution, these mechanism generate the tolerance limited, which is then subtracted by evaporation loss solvent again
It is small.
After coating solvent-laden PSA, solvent is removed.This is particularly preferably in the drying with the very long residence time
It is completed in channel.In general, in different temperature sections, heating is carried out to supreme level, bubble is formed to prevent.In addition, most
Whole drying temperature should be higher than the boiling point of solvent, next be removed to ultrathin full shading double-sided pressure-sensitive adhesive tape to minimize
Gas.
In the first step, which is coated to barrier liner.This is preferably carried out from very dilute solution.A kind of excellent
In the embodiment of choosing, the solid content of solution is less than 25% highly preferably less than 15%.It is (small using low-down solid content
In 15% solid content) make it possible to reduce PSA tape film coating layer thickness tolerance.
Such as 1g/m2 ± 30% (solid after dry) can get by using 5- roller applicators for coating weight
Layer thickness tolerance, wherein ± 30% correspond in terms of absolute value (absolute terms) have 0.3g/m2Fluctuation.
After the first coating step of PSA, adhesive is dried in dry channel and removes solvent.It is also available to draw
The heat entered is reacted to cause heat cross-linking.It may also need to make the composition be crosslinked using UV and/or electron beam.For this purpose, can be used
In melt process it is stated that technology.
After the coating and drying of contact adhesive, carrier layer is depressed on adhesive.For this purpose, it may be necessary to
Carrier film is pre-processed for example, by corona.Lamination carries out in which should not have bubble.Also it should be ensured that selection stretching is answered
Power is far below the breaking tension (breaking of carrier film especially in the case of carrier film very thin scheme
tension).In a preferred embodiment, the tensile stress lower than the breaking tension of carrier film at least 50%.
In addition, in order to produce ultrathin full shading double-sided pressure-sensitive adhesive tape, it is also desirable to apply the second psa layer.On this can be used
State method progress.In principle, the PSA in second coating can be applied directly onto carrier film (by barrier liner, psa layer and carrier
The component that film is formed) on.But this is not preferred embodiment, this is because in this case may be because of heat
It is introduced into and generates stress in the dry channel of downstream.Highly preferred scheme includes that the 2nd PSA is coated to barrier liner first
On step, then made it dry in dry channel, then by it and the component one that is formed by barrier liner, PSA and carrier film
It rises and is laminated on carrier film side.This can to make carrier film from thermal force, this is less than 4 microns for layer thickness, more preferable layer
Carrier film of the thickness less than 2 microns is advantageous.
Also in the operating procedure, may also need to according to method identified above with UV and/or electron beam to psa layer into
Row crosslinking.
In highly preferred scheme, use ultrathin full shading double-sided pressure-sensitive adhesive tape as double linings in the component
Pad product (double-liner product).Double liner schemes make it possible to avoid air inclusion and bubble, no
Then, gentle steep oneself-meeting of air inclusion deleteriously influences the thickness deviation of product, and can lead to the process used in the utility model
The inhomogeneities of middle properties.
Using
The adhesive tape of the utility model particularly suitable as shading double-sided pressure-sensitive adhesive tape, for producing all kinds of different products,
Especially electronic product.Representative electronic product includes (but being not limited to)：Computer, TV, laptop computer, PDA, mobile phone,
The liquid-crystal data display system (liquid crystal display, LC displays, LCD) of the needs such as digital camera.
Typically, the full shading double-sided pressure-sensitive adhesive tape of the ultrathin type of the utility model is used to bond in the shell of back light unit
The purposes of reflectance coating.For this purposes, it can be used one or two isolation films or barrier paper double to the full shading of the ultrathin type
Face pressure sensitive tape is usually coated.In the first step, the product (cutting part) for generating perforation, in this regard, typical tablet can be used herein
(flat-bed), rotation or laser die cutting method.In a kind of highly preferred embodiment, the ultrathin type is hidden entirely first
Light double-sided pressure-sensitive adhesive tape is laminated on entire area on reflectance coating.
For this purpose, needs to remove the barrier liner, then carry out lamination step.The lamination of reflectance coating must be not wrap
The mode of bubbles or impurity carries out, to avoid inhomogeneities.
For example, after ultrathin full shading double-sided pressure-sensitive adhesive tape completely or partially can be bonded on the reflectance coating,
It is set to form desired shape in die-cutting process.
Then, the barrier liner is moved from the component including reflectance coating and ultrathin full shading double-sided pressure-sensitive adhesive tape
It removes, then the component is placed in the shell of back light unit.The shell can be manufactured by plastics or metal.It is much preferred that
Use plastics such as makrolon.
Compared with prior art, the major advantage of the adhesive tape of the utility model includes：
(1) very thin under the premise of meeting mechanical strength；
(2) excellent effect of full shading；
(3) raw material used are environmentally friendly, safe；
(4) inorganic fillers such as carbon black do not migrate, do not assemble, therefore stability is high；
(5) distribution of color is uniform；
(6) it is not required to print, pattern caused by not printing is inhomogenous；
(7) compared with printing film, the utility model adhesive tape non-volatility organic compound is more environmentally-friendly.
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In the following examples, the experimental methods for specific conditions are not specified, leads to
Often according to normal condition, or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise percentage and number are weight
Percentage and parts by weight.
1. the measurement of the measurement and pet layer thickness of adhesive tape overall thickness
It is measured according to DIN53370 standard methods.
In addition, can also be measured according to ASTM D 1000-04 (on September 1st, 2004) (No.21 to 27), use is following
Parameter：Disk diameter 10mm (No.23.1.2.)；The pressure 4N (No.23.1.3.) of application；Experimental condition：23 DEG C of temperature, 50%
Atmospheric humidity；The evaluation carries out in one hour；The place in distance 10cm in the transverse direction of the adhesive tape of movement is measured to carry out.
In addition, the alternative approach as measurement, can correspondingly use AFERA 4000/PSTC 33, the parameter used is such as
On.
Standard deviation s is calculate by the following formula：
In formula, n is the number of data value, xi：Indicate single measurements,Indicate being averaged for all measured values.
2. the measurement of light transmittance (%)
It is measured according to DIN 5033-4 standard methods.
Embodiment 1
Ultrathin full shading double-sided pressure-sensitive adhesive tape No.1
As shown in Figure 1, the full shading double-sided pressure-sensitive adhesive tape of ultrathin type in the present embodiment include be laminated from top to bottom it is following
Each layer：
(a) the first pressure sensitive adhesive adhesion coating 11, thickness are 3.5 microns；
(b) black PET material layer 12, thickness are 18 microns；
(c) the second pressure sensitive adhesive adhesion coating 13, thickness are 3.5 microns；
Wherein, a main surface of the black pet layer is bonded with the first pressure sensitive adhesive adhesion coating, and described black
Another main surface of color pet layer is bonded with the second pressure sensitive adhesive adhesion coating；
The overall thickness (a1+b+a2) of the adhesive tape is 25 microns.
After measured, overall thickness standard deviation≤1 micron of the adhesive tape, and full shading.
Embodiment 2
Ultrathin full shading double-sided pressure-sensitive adhesive tape No.2
As shown in Fig. 2, the full shading double-sided pressure-sensitive adhesive tape of ultrathin type in the present embodiment include be laminated from top to bottom it is following
Each layer：
(a0) the first peeling layer 14；
(a) the first pressure sensitive adhesive adhesion coating 11, thickness are 3 microns；
(b) black PET material layer 12, thickness are 15 microns；
(c) the second pressure sensitive adhesive adhesion coating 13, thickness are 3 microns；
Wherein, a main surface of the black pet layer is bonded with the first pressure sensitive adhesive adhesion coating, and described black
Another main surface of color pet layer is bonded with the second pressure sensitive adhesive adhesion coating；
The overall thickness (a1+b+a2) of the adhesive tape is 21 microns.
After measured, overall thickness standard deviation≤0.5 micron of the adhesive tape, and full shading.
Embodiment 3
Ultrathin full shading double-sided pressure-sensitive adhesive tape No.3
As shown in figure 3, the full shading double-sided pressure-sensitive adhesive tape of ultrathin type in the present embodiment include be laminated from top to bottom it is following
Each layer：
(a0) the first peeling layer 14
(a) the first pressure sensitive adhesive adhesion coating 11, thickness are 2 microns；
(b) black PET material layer 12, thickness are 20 microns；
(c) the second pressure sensitive adhesive adhesion coating 13, thickness are 2 microns；
(c1) the second peeling layer 15；
Wherein, a main surface of the black pet layer is bonded with the first pressure sensitive adhesive adhesion coating, and described black
Another main surface of color pet layer is bonded with the second pressure sensitive adhesive adhesion coating；
The overall thickness (a1+b+a2) of the adhesive tape is 24 microns.
After measured, overall thickness standard deviation≤1 micron of the adhesive tape, and full shading.
It is incorporated herein by reference in all documents that the utility model refers to, just as each document quilt
It is individually recited as reference.In addition, it should also be understood that, after having read the above-mentioned instruction content of the utility model, this field skill
Art personnel can make various changes or modifications the utility model, and such equivalent forms equally fall within the application appended claims
Book limited range.
Claims (14)
1. a kind of ultrathin full shading double-sided pressure-sensitive adhesive tape, which is characterized in that the adhesive tape includes the knot being laminated from top to bottom
Structure layer, the structure sheaf include：
(a) the first pressure sensitive adhesive adhesion coating A1, thickness a1；
(b) black PET material layer B, thickness b；
(c) the second pressure sensitive adhesive adhesion coating A2, thickness a2；
Wherein, a main surface of the black PET material layer is bonded with the first pressure sensitive adhesive adhesion coating, and described black
Another main surface of color PET material layer is bonded with the second pressure sensitive adhesive adhesion coating；
Also, the thickness b of the black PET material layer is that the sum of 12~20 microns and the a1+b+a2 are 15~400
Micron, and overall thickness standard deviation≤1 micron of the adhesive tape.
2. adhesive tape as described in claim 1, which is characterized in that the overall thickness of the adhesive tape is 20~100 microns.
3. adhesive tape as described in claim 1, which is characterized in that the overall thickness of the adhesive tape is 20~50 microns.
4. adhesive tape as described in claim 1, which is characterized in that the black PET material layer thickness is 15~20 microns.
5. adhesive tape as described in claim 1, which is characterized in that the black PET material layer thickness is 15~18 microns.
6. adhesive tape as described in claim 1, which is characterized in that the first pressure sensitive adhesive adhesion coating is that thickness is 1~6 micron
Transparent PSA material layer.
7. adhesive tape as described in claim 1, which is characterized in that the first pressure sensitive adhesive adhesion coating is that thickness is 2~4 microns
Transparent PSA material layer.
8. adhesive tape as described in claim 1, which is characterized in that the second pressure sensitive adhesive adhesion coating is that thickness is 1~6 micron
Transparent PSA material layer.
9. adhesive tape as described in claim 1, which is characterized in that the second pressure sensitive adhesive adhesion coating is that thickness is 2~4 microns
Transparent PSA material layer.
10. adhesive tape as described in claim 1, which is characterized in that the outer surface of the first pressure sensitive adhesive adhesion coating is equipped with the
One peeling layer；And/or the outer surface of the second pressure sensitive adhesive adhesion coating is equipped with the second peeling layer.
11. adhesive tape as described in claim 1, which is characterized in that the adhesive tape is coiled material product or articles of sheet material.
12. a kind of coiled material product, which is characterized in that the coiled material product includes：
One core,
And the ultrathin full shading double-sided pressure-sensitive adhesive tape described in claim 1 around the core.
13. coiled material product as described in claim 12, which is characterized in that the breadth of the coiled material is 0.5~2.5 meter.
14. coiled material product as described in claim 12, which is characterized in that the length of the coiled material is 2~2000 meters.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721788292.5U CN207918756U (en) | 2017-12-19 | 2017-12-19 | Ultrathin full shading double-sided pressure-sensitive adhesive tape and its coiled material product |
| PCT/EP2018/082648 WO2019120898A1 (en) | 2017-12-19 | 2018-11-27 | Ultra-thin fully light-shielding double-sided pressure-sensitive adhesive tape and roll product thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721788292.5U CN207918756U (en) | 2017-12-19 | 2017-12-19 | Ultrathin full shading double-sided pressure-sensitive adhesive tape and its coiled material product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207918756U true CN207918756U (en) | 2018-09-28 |
Family
ID=63607221
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721788292.5U Active CN207918756U (en) | 2017-12-19 | 2017-12-19 | Ultrathin full shading double-sided pressure-sensitive adhesive tape and its coiled material product |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN207918756U (en) |
| WO (1) | WO2019120898A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086305A (en) * | 2019-12-04 | 2020-05-01 | 维达力实业(深圳)有限公司 | Plastic cover plate and preparation method thereof |
| CN112831285A (en) * | 2019-11-22 | 2021-05-25 | 上海永超新材料科技股份有限公司 | Shading film for mobile phone rear cover plate and preparation method and application thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004058282A1 (en) * | 2004-12-02 | 2006-06-08 | Tesa Ag | Double-sided pressure-sensitive adhesive tapes for the production of LC displays with light-reflecting and absorbing properties |
| DE102005027350A1 (en) * | 2005-06-13 | 2006-12-14 | Tesa Ag | Double-sided pressure-sensitive adhesive tapes for the production or bonding of LC displays with light-absorbing properties |
| JP4875357B2 (en) * | 2005-12-19 | 2012-02-15 | リンテック株式会社 | Double-sided adhesive tape |
| DE102007019131A1 (en) * | 2007-04-20 | 2008-10-23 | Tesa Ag | Double-sided pressure-sensitive adhesive tape |
| JP5647576B2 (en) * | 2010-08-05 | 2015-01-07 | 日東電工株式会社 | Adhesive tape |
| JP6574640B2 (en) * | 2015-08-19 | 2019-09-11 | 積水化学工業株式会社 | Double-sided adhesive tape and liquid crystal display device |
-
2017
- 2017-12-19 CN CN201721788292.5U patent/CN207918756U/en active Active
-
2018
- 2018-11-27 WO PCT/EP2018/082648 patent/WO2019120898A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831285A (en) * | 2019-11-22 | 2021-05-25 | 上海永超新材料科技股份有限公司 | Shading film for mobile phone rear cover plate and preparation method and application thereof |
| CN111086305A (en) * | 2019-12-04 | 2020-05-01 | 维达力实业(深圳)有限公司 | Plastic cover plate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019120898A1 (en) | 2019-06-27 |
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