CN100345678C - Release liner and pressure-sensitive adhesive tape or sheet employing the same - Google Patents
Release liner and pressure-sensitive adhesive tape or sheet employing the same Download PDFInfo
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- CN100345678C CN100345678C CNB2005100704852A CN200510070485A CN100345678C CN 100345678 C CN100345678 C CN 100345678C CN B2005100704852 A CNB2005100704852 A CN B2005100704852A CN 200510070485 A CN200510070485 A CN 200510070485A CN 100345678 C CN100345678 C CN 100345678C
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Abstract
The release liner includes a release layer constituted of at least one polyolefin resin, wherein the release layer has surface irregularities. The surface irregularities of the release layer may be constituted of recesses and protrusions which are irregularly different in shape and have been disposed in irregular arrangement. The release layer preferably has a surface roughness Ra of 1-3 mu m. As the polyolefin resin constituting the release layer can be used at least one polyolefin resin selected from the group consisting of polyethylenes, polypropylene, polybutenes, poly(4-methyl-1-pentene), and copolymers of ethylene with one or more alpha -olefins having 3-10 carbon atoms.
Description
Technical field
The present invention relates to pressure-sensitive adhesive tape or sheet and the peeling liner that is used for wherein, in more detail, relate to as useful pressure-sensitive adhesive tape or sheet and use therein peeling liner in the hard disk drive use.
Background technology
The peeling liner that uses in pressure-sensitive adhesive tape generally is made of with base material and the peeling agent layer that is arranged on this base material peeling liner, is known that by being coated with polysiloxane-based stripping treatment agent and having made it to be solidified to form as described peeling agent layer.For example, pressure-sensitive double-side type splicing tape etc., then be that the bond layer that is made of acrylic compounds pressure-sensitive bonding agent is set on the peeling liner that has been coated with polysiloxane-based remover, but to such peeling liner that is coated with polysiloxane-based remover, when using pressure-sensitive adhesive tape, because the part of the polysiloxane compound in the peeling liner is attached to bond layer one side, therefore has and pollute bond layer and make significantly impaired problem of adhesive property.Also have, this pressure-sensitive adhesive tape is used the fixed-purpose etc. of HDD (magnetic recording system) electronic instrument of etc.ing when middle,, then have the problem that makes electronic instrument inside be corroded and cause maloperation particularly in the occasion of the inside of electronic instrument use.This is owing to become the cause in the generation source of siloxane gas from the gdna contamination of the bond layer of the polysiloxane compound in the peeling liner.
On the other hand, give the peeling liner of peeling off function as not using polysiloxane-based remover as described above, that has known has, for example, peeling liner with base material on extruding layer press the surface oxidation (referring to patent documentation 1～patent documentation 2) that will suppress this layer when the peel ply that is made of the ldpe resin layer is being extruded lamination, extruding layer presses the peel ply (referring to patent documentation 3～patent documentation 4) by the hybrid resin of low density polyethylene (LDPE) and low-crystalline ethylene-propylene copolymer or low-crystalline ethene-butene-1 random copolymer on the peeling liner base material, on base material by the end liner layer form specific thickness than and stipulated the peel ply (referring to patent documentation 5) etc. of the polyvinyls of amount of gas evolved.Also having, is purpose to produce fine structure in bonding agent, and the concavo-convex grade that forms the concaveconvex structure of following the trail of peeling liner on the bond layer surface also is known (referring to patent documentation 6～patent documentation 7).And then also have, as other remover, the peeling liner of use fluorine class remover etc. also is well-known.These peeling liners are provided with the pressure-sensitive bond layer according to following operation, use as pressure-sensitive adhesive sheet or band.
Hard disk drive (HDD),, is not wanted the automation of personnel cost and is pasted when pasting in order to adapt to the cost degradation at full speed of hard disk drive in recent years with pressure-sensitive adhesive tape (or sheet), also at full speed pastes in order to improve output.During High-Speed Automatic machinery is like this pasted, at first, be at the substrate surface (reverse side of bonding agent aspect or the back side) of the attached splicing tape of the enterprising line space aspiration of air absorptive table, directly peel off peeling liner, carry out so-called operation of on hard disk drive, pasting.At this moment, air adsorbed when strong, splicing tape itself is had concave-convex type, make outward appearance significantly impaired, damaged simultaneously as the air-tightness of hard disk drive (HDD) with one of function of pressure-sensitive adhesive tape, so the absorption of air absorption can only carrying out with the minimal air adsorption strength that is allowed air.For this reason, carrying out such high speed when peeling off, from hard disk drive (HDD) with the peeling force of pressure-sensitive adhesive tape (or sheet) when peeling peeling liner, than required minimal air absorption affinity also a little less than.Wherein, as the peeling force also more weak, be that the peeling force when peeling off peeling liner under peeling rate 1m/min, 180 ° of conditions of peel angle will be at 0.3N/50mm or below the 0.3N/50mm than air absorption affinity.
To reduce peeling force is purpose, and it also is (referring to the patent documentation 8) known that the shape on peel ply surface is become cancavo-convex peeling liner.Yet there is the peeling liner of concaveconvex shape on surface in the past, its remover polyolefin resin of no use, usefulness be removers such as polysiloxanes resinoid and fluorine-type resin.
Also have, HDD precision electronic devices such as (magnetic recording systems) is subject to electrostatic influence, and the occasion of static takes place in HDD manufacturing process, may break down owing to static jeopardizes instrument sometimes.
[patent documentation 1] special public clear 51-20205 communique],
[patent documentation 2] opens clear 63-85642 communique in fact
[patent documentation 3] special public clear 57-45790 communique
[patent documentation 4] spy opens flat 6-155687 communique
[patent documentation 5] spy opens the 2003-127299 communique
The flat 9-50423 communique of [patent documentation 6] special table
[patent documentation 7] special table 2001-507732 communique
[patent documentation 8] spy opens the 2002-219778 communique
The content of invention
The problem that invention solves
Yet, as need not polysiloxane-based remover and give the peeling liner of peeling off function, for example, peeling liner with the peel ply that adopts polyolefin resin, do not show the good function of peeling off for pressure-sensitive bonding agent with high adherence, peeling force is also stronger than air absorption affinity, therefore can not be adapted to peeling off with High-Speed Automatic machine.Also have, when peeling off, take off the pressure-sensitive bonding agent, become peel off (so-called " stick slip ") of pulse type,, no longer can effectively bring into play its original performance because the surface of pressure-sensitive bond layer becomes coarse from peel ply.
On the other hand, use the peeling liner of fluorine class remover, its smooth stripping performance that comes from the pressure-sensitive bond layer is good, but costs an arm and a leg, along with the cost degradation of hard disk drive in recent years, and cost degradation that can not adaptation material.
Also have, general pressure-sensitive adhesive tape or sheet have the situation that produces stripping charge when peeling off peeling liner, and the weak current that produced this moment might produce obstacle in precision electronic device.
Therefore, even the object of the present invention is to provide in the peel ply peeling liner that need not polysiloxane-based remover also can peel off peel ply and pressure-sensitive bond layer smoothly, and the pressure-sensitive adhesive tape or the sheet that use this peeling liner.
Another purpose of the present invention provides the peeling liner of the voltage levvl that can be reduced in the stripping charge that peeling liner is produced when pressure-sensitive adhesive tape or sheet are peeled off, and the pressure-sensitive adhesive tape or the sheet that use this peeling liner.
Even do not pollute hard disk drive when a further object of the present invention provides on pasting hard disk drive and the pressure-sensitive bond layer has high adherence, still can use " High-Speed Automatic mechanical sticker " in the time of on pasting hard disk drive, and can be used as useful pressure-sensitive adhesive tape or sheet in the hard disk drive use, and the peeling liner that in this pressure-sensitive adhesive tape or sheet, uses.
The measure of dealing with problems
The inventor has carried out result of study with keen determination in order to achieve the above object and has found, as the peeling liner that uses in pressure-sensitive adhesive tape or the sheet, has the peel ply that forms by polyolefin resin, and peel ply uses when having the peeling liner of specific surface configuration, even in peel ply, need not polysiloxane-based remover be peeled off by peel ply and pressure-sensitive bond layer smoothly, therefore, described pressure-sensitive adhesive tape or sheet be used for hard disk drive and when using, do not pollute hard disk drive, and on pasting hard disk drive the time, can use " High-Speed Automatic mechanical sticker ".Just be based on these discoveries and finishing the present invention.
That is, the invention provides a kind of peeling liner, it is the peeling liner with the peel ply that is formed by polyolefin resin, it is characterized in that, the peel ply surface has concaveconvex shape.
In peeling liner of the present invention, as the concaveconvex shape on peel ply surface, preferably, irregular difform each jog is with the concaveconvex shape of the jog generation of the form of irregular position relation configuration.The surface roughness Ra on peel ply surface serves as preferred with 1～3 μ m.As the polyolefin resin that constitutes peel ply, can use at least a polyolefin resin of from the copolymer of the alpha-olefin of polyethylene, polypropylene, polybutene, poly-(4-methyl-1-pentene) and ethene and carbon number 3～10, selecting.Also have, preferably have and on base material, directly form peel ply or by the structure of other layer for intermediary's lamination.
As described peeling liner, preferably has electrostatic-proof function.Also have, as such peeling liner, preferably on the one side at least of its base material or have the antistatic processing layer in the base material.As described antistatic backing, be suitable with metal foil layer or metal evaporation layer.
Among the present invention, also comprised a kind of pressure-sensitive adhesive tape or sheet, it is pressure-sensitive adhesive tape or the sheet with pressure-sensitive bond layer, it is characterized in that, on the pressure-sensitive bond layer, described peeling liner engages and lamination with peel ply according to the pressure-sensitive bond layer.
In above-mentioned pressure-sensitive adhesive tape or sheet, as the pressure-sensitive bond layer, with formed by acrylic adhesives serve as preferred.Also having, serves as preferred with the structure of pasting peeling liner on the pressure-sensitive bond layer that coating pressure-sensitive bonding agent forms on the support base material.
Pressure-sensitive adhesive tape of the present invention or sheet go for hard disk drive with pressure-sensitive adhesive tape or sheet.
The effect of invention
If use peeling liner of the present invention,, peel ply and pressure-sensitive bond layer are peeled off smoothly even when in peel ply, not using polysiloxane-based remover.And then, can be reduced in the voltage levvl of the stripping charge that when pressure-sensitive adhesive tape or sheet peel off peeling liner, is produced.Therefore, when having used the pressure-sensitive adhesive tape of above-mentioned peeling liner or sheet to paste on the hard disk drive, do not pollute hard disk drive, and, even the pressure-sensitive bond layer has high adherence, in the time of on being attached to hard disk drive, still can use " High-Speed Automatic mechanical sticker ", and use is of great use in hard disk drive.
[description of drawings]
Fig. 1: the section synoptic diagram that an example of peeling liner of the present invention partly is shown.
Fig. 2 (a)～(b): the section synoptic diagram that another example of peeling liner of the present invention partly is shown.
Fig. 3 (a)～(b): the section synoptic diagram that another example of peeling liner of the present invention partly is shown.
Fig. 4 (a)～(b): the section synoptic diagram that the example of the pressure-sensitive adhesive tape that uses peeling liner of the present invention or sheet partly is shown.
Fig. 5 (a)～(b): the section synoptic diagram that the example of the pressure-sensitive adhesive tape that uses peeling liner of the present invention or sheet partly is shown.
[symbol description]
1 base material (peeling liner base material)
1a base material (peeling liner base material)
1b base material (peeling liner base material)
2 end liner layers
The peel ply of 3 concave-convex surface shapes (concave-convex surface peel ply)
4 peeling liners
The 4a peeling liner
The 4b peeling liner
The 4c peeling liner
The 4d peeling liner
5 pressure-sensitive bond layers
6 support base materials (pressure-sensitive adhesive tape support base material)
7 pressure-sensitive adhesive tapes
The 7a pressure-sensitive adhesive tape
The 7b pressure-sensitive adhesive tape
The 7c pressure-sensitive adhesive tape
8 antistatic backings
The preferred plan that carries out an invention
Below, illustrate in greater detail the present invention with reference to necessary accompanying drawing.In addition, adopt same symbol for same parts or position sometimes.
[peeling liner]
Fig. 1 is the section synoptic diagram that an example of peeling liner of the present invention partly is shown.In Fig. 1, the 1st, base material (peeling liner base material), the 2nd, end liner layer, the 3rd, the peel ply of concave-convex surface shape (following be called sometimes " concave-convex surface peel ply "), the 4th, peeling liner.Peeling liner 4 shown in Figure 1 is to constitute by base material 1 with at the one-sided end liner layer 2 that forms of this base material 1 and the concave-convex surface peel ply 3 that forms on this end liner layer 2.Above-mentioned concave-convex surface peel ply 3 is formed by polyolefin resin, and its surface becomes concaveconvex shape (having concaveconvex structure).That is to say that peeling liner 4 has by polyolefin resin and formed and the peel ply 3 of concave-convex surface shape.
As mentioned above; peeling liner of the present invention; owing to when peel ply is formed by polyolefin resin,, also do not transfer to the situation of pressure-sensitive bond layer from the polysiloxanes composition of polysiloxane-based remover even when being used for the surface protection of pressure-sensitive bond layer.And peeling liner even peel ply is not to be formed by polysiloxane-based remover, but is formed by polyolefin resin, but because of the surface becomes concaveconvex shape, so can successfully peel off peel ply and pressure-sensitive bond layer.
Specifically, when using peeling liner of the present invention, be equal to or less than 180 ° of peeling forces (the draw speed 1m/min, 23 ℃ * 60%RH), then can peel off from hard disk drive the peeling liner of lamination on the pressure-sensitive bond layer with the pressure-sensitive bond layer of pressure-sensitive adhesive tape or sheet of 0.3 (N/50mm) [preferably be equal to or less than 0.25 (N/50mm), further preferably be equal to or less than 0.2 (N/50mm)] in use.
Therefore; above-mentioned peeling liner is being used for; for example; hard disk drive is during with the protection of the pressure-sensitive bond layer in pressure-sensitive adhesive tape or the sheet; hard disk drive is with pressure-sensitive adhesive tape or sheet; because the pressure-sensitive bond layer protected by the formed peel ply of polyolefin resin, so on pasting hard disk drive the time, the pollution that silicone component causes can not take place on the hard disk drive.And; even the pressure-sensitive bond layer has high cohesive; because there is concaveconvex shape on the surface of the peel ply of protection pressure-sensitive bond layer, so on pasting hard disk drive the time, just can successfully peel off peel ply and pressure-sensitive bond layer with High-Speed Automatic machine.Thus, even utilize is that " the High-Speed Automatic mechanical sticker " of the device pasted by High-Speed Automatic machine is also without any problem, can peel off peeling liner from the pressure-sensitive bond layer with High-Speed Automatic machinery, can on hard disk drive, carry out sticking operation with the operation of excellence.Therefore, in the stickup automation of seeking pressure-sensitive adhesive tape or sheet, also can realize the batch process of hard disk drive and reduce cost.
Also have, with the pressure-sensitive bond layer in pressure-sensitive adhesive tape or the sheet, can use the pressure-sensitive bond layer that always uses as hard disk drive, for used pressure-sensitive bond layer without any restriction.Certainly, the peel ply that constitutes by polyolefin resin in the peeling liner, for hard disk drive with the cohesive of pressure-sensitive adhesive tape or sheet without any harmful effect.
As peeling liner, so long as formed and the surface has the peel ply (concave-convex surface peel ply) of concaveconvex shape get final product by polyolefin resin, the layer (for example, base material or end liner layer, antistatic backing etc.) beyond the concave-convex surface peel ply has and do not have can.Specifically, as peeling liner, the structure that has successively the end liner layer that forms, concave-convex surface peel ply as shown in Figure 1 on base material is also passable, is shown in the structure of formation concave-convex surface peel ply on the base material as Fig. 2 (a), or it is also passable only to form the structure of concave-convex surface peel ply shown in Fig. 2 (b).And then also have, as peeling liner, shown in following Fig. 3 (a) like that in the structure that forms antistatic backing, end liner layer, concave-convex surface peel ply on the base material successively with such shown in following Fig. 3 (b) to have the formation that forms end liner layer, concave-convex surface peel ply on there is the base material of antistatic backing inside successively also passable.Fig. 2 is the section synoptic diagram that other example of peeling liner of the present invention partly is shown.Fig. 2 (a) and (b) in, each peeling liner naturally of 4a, 4b, 1,3 as before, the 1st, base material and 3 is concave-convex surface peel plies.Peeling liner 4a shown in Fig. 2 (a) is constituted by base material 1 with at the direct concave-convex surface peel ply 3 that forms of a side of base material 1, and the peeling liner 4b shown in Fig. 2 (b) only is made of concave-convex surface peel ply 3.
Fig. 3 is the summary profile that other example of peeling liner of the present invention partly is shown.Fig. 3 (a) and (b) in, 1a, the 1b base material (peeling liner base material) of respectively doing for oneself, 8 is antistatic backing, 4c～4d peeling liner of respectively doing for oneself.Also have, 1,2,3 as before, and the 1st, base material, the 2nd, end liner layer, the 3rd, concave-convex surface peel ply.Peeling liner 4c shown in Fig. 3 (a) is constituted by base material 1 with at the antistatic backing 8 that forms on the single face of this base material 1 and the end liner layer 2 that forms on this antistatic backing 8 and the concave-convex surface peel ply 3 that forms on end liner layer 2.Peeling liner 4d shown in Fig. 3 (b) is constituted by base material 1a with at the antistatic backing 8 that forms on the single face of this base material 1a with at the base material 1b that forms on this antistatic backing 8 and the end liner layer 2 that is forming on the single face of this base material 1b and the concave-convex surface peel ply 3 that forms on this end liner layer 2.
(concave-convex surface peel ply)
As previously mentioned, the concave-convex surface peel ply is formed by the polyolefin resin as remover, and there is concaveconvex shape on its surface.Enumerated as the polyolefin resin that constitutes the concave-convex surface peel ply, for example, polyethylene (for example, low density polyethylene (LDPE), LLDPE, metallocene catalyst method polyethylene, medium density polyethylene, high density polyethylene (HDPE) etc.), polypropylene, polybutene [for example, poly-(1-butylene) etc.], poly-(4-methyl-1-pentene), alpha olefin copolymer [for example, the copolymer of the alpha-olefin of ethene and carbon number 3～10 (below be sometimes referred to as " ethene-alpha-olefin copolymer "), copolymer of the alpha-olefin of propylene and carbon number 4～10 (below be sometimes referred to as " propylene-alpha-olefin copolymers ") etc.] etc.Also have,, also can use copolymer [for example, ethylene-acrylic acid copolymer (EAA), the ethylene-methacrylic acid copolymer ethene-copolymers of unsaturated carboxylic acids such as (EMAA) of ethene and alpha-olefin composition in addition as olefine kind resin; Ionomer; Ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl methacrylate methyl terpolymer ethene-(methyl) acrylate copolymers such as (EMMA); Vinyl-vinyl acetate copolymer (EVA); Ethylene-vinyl alcohol copolymer etc.].Polyolefin resin can use separately or be used in combination more than 2 kinds or 2 kinds.
Be again, in the above-mentioned ethene-alpha-olefin copolymer (copolymer of the alpha-olefin of ethene and carbon number 3～10), at least a kind of alpha-olefin preferably from propylene, 1-butylene, 1-hexene, 4-methyl-1-pentene and 1-octene, selecting as the alpha-olefin of carbon number 3～10 (monomer altogether).Therefore,, enumerated as ethene-alpha-olefin copolymer, for example, ethylene-propylene copolymer, ethene-(1-butylene) copolymer etc.Also have, in propylene-alpha-olefin copolymers, as the alpha-olefin of carbon number 4～10, can from 1-butylene, 1-hexene, 4-methyl-1-pentene and 1-octene, select at least a alpha-olefin for (monomer altogether) for suitable use.Therefore,, enumerated as propylene-alpha-olefin copolymers, for example, propylene-(1-butylene) copolymer etc.
As polyolefin resin, preferably polyethylene (particularly, straight-chain low density polyethylene, low density polyethylene (LDPE)), polypropylene, polybutene, poly-(4-methyl-1-pentene), ethene-alpha-olefin copolymer, at least 2 kinds of polyvinyls wherein can suitable use from straight-chain low density polyethylene, low density polyethylene (LDPE) and ethene-alpha-olefin copolymer, selecting.
As above-mentioned polyvinyls, serve as preferred to contain straight-chain low density polyethylene at least, particularly, contain be main component with the straight-chain low density polyethylene in, it is suitable also containing low density polyethylene (LDPE) and ethene-alpha-olefin copolymer.Be main component and contain low density polyethylene (LDPE) and the occasion of ethene-alpha-olefin copolymer containing with the straight-chain low density polyethylene, cooperation ratio for them has no particular limits, for example, preferably, with respect to straight-chain low density polyethylene 100 weight portions, low density polyethylene (LDPE) is that 0～25 weight portion, ethene-alpha-olefin copolymer are 30～300 weight portions.When having exceeded this proportion, infringement can take place peel off function, perhaps make forming property become abundant inadequately.
Also have, in above-mentioned straight-chain low density polyethylene,, can suitably select as the common monomer that uses simultaneously with ethene, wherein with 1-hexene or 1-octene for well.
As polyolefin resins such as polyvinyls, can use known method, the selection by, separation condition refining to its polymeric reaction condition and back etc. is easy to obtain.In addition, also can directly use commercially available product.
The concave-convex surface peel ply has jog (particularly, fine jog) on its surface.As formed jog on the surface of concave-convex surface peel ply, the shape of each jog can be all identical or part is identical or different fully.Moreover the identical or diverse occasion of the shape part of each jog (that is, not being identical occasion), the different shape that the shape of each jog can have rule can also have irregular difformity.No matter also have, as the configuration of each jog, be that the form that the form of position relation (or the at interval) configuration with rule still disposes with irregular position relation (or at interval) can.Therefore, jog can have the form of whole identical or regular or irregular difform each jogs with rule or irregular position relation (or at interval) configuration.
Among the present invention, serves as preferred as jog to be irregular difform each jog with the jog (following claim sometimes " scrambling jog ") of the form of irregular position relation configuration, at this moment, each jog is that fine each jog is for preferred especially.That is to say that the concaveconvex shape on peel ply surface is being that the concaveconvex shape that produced by the scrambling jog (particularly, fine concaveconvex shape) is preferred.
Like this, peel ply just has the surface of concaveconvex shape.Surface roughness (mean roughness) Ra for the peel ply surface has no particular limits, can from, for example, select in the scope of 0.5～5 μ m (preferred 1～3 μ m), with 1.5～2 μ m for suitable especially.When surface roughness Ra during less than 0.5 μ m, the situation that can not give full play to stripping performance is just arranged, on the other hand,, will influence the later air-tightness of adhesive phase (sealing) when surface roughness Ra during greater than 5 μ m.
In addition, have no particular limits, for example, can in the scope of 1～15 μ m (preferred 3～10 μ m), select for the maximal roughness Rt on peel ply surface, with 4～8 μ m for suitable especially.The maximal roughness Rt on peel ply surface has the situation that can not give full play to stripping performance during less than 1 μ m, and on the other hand, when bigger than 15 μ m, the air-tightness later to bond layer (sealing) is influential.
The roughness Ra on peel ply surface and maximal roughness Rt can measure by the contact surface roughness measurement device " P-11 " that uses TENCOR society to make.
As the method that forms the jog in the concave-convex surface peel ply, can utilize the method for formation jog well-known and even that use traditionally, for example, the polyolefin resin of molten condition being expressed into the forming rolls of having implemented concavo-convex engraving etc. goes up and the method for transfer printing concaveconvex shape, perhaps, the methods that formed with the extruding such as roller that concaveconvex shape arranged after having formed polyolefin resin layer etc. can constitute according to the layer as the shape of the jog of purpose and peeling liner and wait suitably selection from the method for well-known and even custom use.
No matter the concave-convex surface peel ply is that any formation in the single or multiple lift can.Be again, the thickness for the concave-convex surface peel ply has no particular limits, and for example, can be 5～20 μ m, preferred 7～15 μ m.The thickness of concave-convex surface peel ply is thin excessively, makes in uneven thicknessly, on the other hand, when blocked up and only when the single face of base material film is provided with, has reduced the anti-performance of crispaturaing, and the situation that increases amount of gas evolved is just arranged when being provided with on the two sides.
Even the thickness of concave-convex surface peel ply is meant that summit (top) from protuberance is to the thickness of the bottom of concave-convex surface peel ply.Protuberance during as the thickness of the concavo-convex peel ply of gauging surface can get in the average height that highly maximum protuberance still is a protuberance any one can, be suitable to adopt highly maximum protuberance.
(base material)
Base material can use arbitrarily.For base material, have no particular limits, can suitable use be those materials that can wholely play enhancement layer to peeling liner, undesirable pollution does not take place (for example, dust etc.) and have the microfabrication adaptive in the manufacturing process of peeling liner.
Specifically,, can use as base material, for example, the film or sheet [for example, the polythylene resins such as high density polyethylene (HDPE), low density polyethylene (LDPE), LLDPE, or polyolefin resins such as polypropylene, poly 4-methylpene-1 that constitute by thermoplastic resin; Various polyamide-based resins (so-called " nylon " etc.); Polyester such as PETG; Styrene resins such as polystyrene; Film that everybody thermoplastic resin be familiar with such as polyvinyl chloride constitutes or sheet etc.], metal forming (for example, aluminium foil, stainless steel foil, Copper Foil etc.) etc.No matter as the thermoplastic resin of the material of base material or metal forming etc. is that use separately or be used in combination more than 2 kinds or 2 kinds can.In the middle of these,, be suitable to use by film or sheet that polypropylene or polyester were constituted as base material.
Base material have single or multiple lift any formation can, for example, base material is that the metal evaporation film is also passable.
Thickness for base material has no particular limits, can, for example, suitably select in 10～100 μ m (preferred 25～80 μ m, more preferably 30～60 μ m) scope.
And among the present invention, surface treatments such as Corona discharge Treatment can be carried out in the surface of base material.
(end liner layer)
The end liner layer can use arbitrarily.The end liner layer can form at least one face of base material, and the layer that also can be used as between base material and the concave-convex surface peel ply forms.Such end liner layer can by, for example, polyolefin resin same (particularly polythylene resin such as low density polyethylene (LDPE)) etc. and forming with above-mentioned concave-convex surface peel ply.
The end liner layer can have any formation of single or multiple lift.As the thickness of end liner layer can, for example, select in 5～20 μ m (preferred 8～15 μ m) scope.The thickness of end liner layer is crossed when thin, and it is inhomogeneous that thickness becomes, and on the other hand, only when the single face of base material is provided with, its anti-performance of crispaturaing descends when blocked up, then have when being provided with on the two sides lack flexibility (adaptability) of operation can situation.
As previously mentioned, as long as have the concave-convex surface peel ply as peeling liner of the present invention, the structure of concave-convex surface peel ply that just can have lamination on base material also can have the structure that is only formed by the concave-convex surface peel ply.As having enumerated in the structure of the long-pending concave-convex surface peel ply of layers on substrates, shown in Fig. 1 or Fig. 2 (a), on the one side of base material lamination the structure of concave-convex surface peel ply, perhaps in the structure of the two sides of base material lamination concave-convex surface peel ply etc.That is,, can have on the one side (one or both sides) at least of base material separately directly or by the structure of other layer for the concave-convex surface peel ply of intermediary's lamination as peeling liner.Specifically, enumerated, for example, as shown in Figure 1, formed the structure of end liner layer, concave-convex surface peel ply successively at the single face of base material as the layer structure of the peeling liner that base material is arranged; Shown in Fig. 2 (a), except the structure that forms the concave-convex surface peel ply on the single face of base material, that enumerates has a structure that forms end liner layer, concave-convex surface peel ply successively on the base material two sides; One side at base material forms the structure that forms the concave-convex surface peel ply on end liner layer, concave-convex surface peel ply and the another side at base material successively; Form the structure of concave-convex surface peel ply etc. on the two sides of base material.
Can wait from formation method of known peeling liner etc. according to its layer structure as the manufacture method of peeling liner and suitably select.Be again, the jog on the surface of concave-convex surface peel ply can adopt when forming peel ply on the predetermined face of base material and end liner layer etc., under the also uncured state of peel ply, use the forming rolls of having implemented concavo-convex engraving to wait and form method concavo-convex, that solidify then; With on the predetermined face of base material and end liner layer etc., formed the surface and formed for waiting in the method for the surface of plane peel ply formation jog with roller again after the peel ply on plane with concaveconvex shape.
When making peeling liner, can suitable use extrusion molding, various lamination methods such as coetrusion, extruding layer platen press, to use the extruding layer platen press for well.Under the situation that the end liner layer is arranged, extruding layer platen press (tandem extruding layer platen press) that can suitable use tandem moor.
In the occasion that forms the concave-convex surface peel ply with tandem extruding layer platen press, being suitable with the method that applies concaveconvex structure on rough surface roller (the マ Star ト ロ-Le) peel ply also uncured on the chill roll after just extruding just having extruded by tandem extruding layer platen press.Can be as described rough surface roller according to suitably selecting as the concaveconvex shape of purpose concave-convex surface peel ply.
As required, in each layer that constitutes peeling liner of the present invention, can also contain a small amount of other composition (for example, resinous principle and additive etc.).
Among the present invention, as required also can be under the place forms between base material and concave-convex surface peel ply or the end liner layer etc. coating, antistatic backing (metal foil layer or metal evaporation layer etc.) etc.As the following paint relevant with following coating, preferably, can make base material and concave-convex surface peel ply or end liner layer obtain the material of abundant cementability, and when using with the peeling liner of pressure-sensitive adhesive tape (or sheet) as HDD, not cause that the material of improper situation serves as preferred.Specifically, as following paint, for example, can use aptly be dissolved in the following paint (tackify paint) that obtains in solvent organic solvents such as ketones such as acetate esters, MEK or acetone such as (for example, etc.) ethyl acetate as ester-carbamates bonding agent, ether-carbamates bonding agent.And, owing to do not use the following paint that contains azacyclopropane compounds or silane coupling agent etc. that becomes HDD internal corrosion and pollution cause, be preferred therefore.Preferred 0.5～1.5 μ m of thickness as following coating.
Shown in Fig. 3 (a) and Fig. 3 (b), described antistatic backing can be arranged in the one side at least or base material of base material.That is to say that antistatic backing can be arranged on the surperficial or inner of base material.Among the peeling liner 4c shown in Fig. 3 (a), between base material 1 and end liner layer 2, formed antistatic backing 8.Among the peeling liner 4d shown in Fig. 3 (b), between base material 1a and base material 1b, formed antistatic backing 8.That is,, in a surface of base material (specifically, be in concave-convex surface peel ply one side surface) or base material, formed antistatic backing at Fig. 3 (a) with (b).
As mentioned above, peeling liner of the present invention preferably has the antistatic interference function.As peeling liner with antistatic interference function, can be in base material, to contain the peeling liner that antistatic agent constitutes, and shown in Fig. 3 (a)～(b), at least one surface of base material or the peeling liner of the structure of antistatic backing is arranged in base material is suitable.Be again, the occasion of antistatic backing is set at least one face of base material, can form antistatic backing at the single or double of base material.In addition, the occasion of antistatic backing is set, can forms antistatic backing at the face of peel ply one side of base material or on facing to any one face in the face of the peel ply opposition side of base material at the single face of base material.
Antistatic backing can have any form of individual layer, multilayer.Also having, form the occasion of antistatic backing on the surface of base material, can be intermediary by other layer, forms antistatic backing on base material.
Antistatic backing (antistatic processing layer), be by the coating handle, for example, the antistatic composition (for example, except the static electricity resistance inserts, also having cationic antistatic agent, anionic antistatic agent, non-ionic antistatic agent, amphoteric ion type antistatic agent etc.) antistatic agent that is scattered in the bonding agent forms, but preferably formed by metal foil layer or metal evaporation layer (metal evaporation rete).When antistatic backing is metal foil layer or metal evaporation layer, by its raw material is stain management, just can be designed to have impurity levels such as so-called foreign ion adjust low-down section point.For with such metal foil layer or relevant metal material of metal evaporation layer, not special restriction, enumerated, for example, various metallic elements such as aluminium (Al), silver (Ag), gold (Au), nickel (Ni), stainless steel, copper, iron, chromium, titanium, cobalt, molybdenum, platinum, tungsten, tantalum, niobium, palladium, soldering alloy, nickel-chromium alloy, nickel-chromium-ferro alloy, copper-manganese-nickel alloy, nickel-manganese-ferroalloy, copper-nickel alloy or contain the alloy etc. of various metallic elements.Considering from the viewpoint of processability, serves as preferred with aluminium as metal material.These metal materials can use with paper tinsel shape form, powder (micro mist, particulate etc.) or fibrous form.The aforementioned metal material can use separately or be used in combination more than 2 kinds or 2 kinds.
Metal forming can be with known and even lamination method lamination that custom is used to the surface of base material etc.Specifically be, for example, the paper tinsel shape thing (metal forming) of aforementioned metal material with known and even lamination method lamination that custom is used to the face (for example, the single face of base material etc.) of the lamination metal forming of base material, just can form antistatic backing by metal foil layer system.
In addition, the evaporation of metal can be used, and for example, known and even method that custom is used such as vacuum vapour deposition is carried out.Specifically be, for example, the micro mist of aforementioned metal material or fibrous material etc. are known with vacuum vapour deposition etc. and even custom is used evaporation coating method gone up at the face of the formation metal evaporation film of base material (for example the single face of base material etc.) form the metal evaporation film, then can make the antistatic backing that constitutes by the metal evaporation film.
In the occasion that forms antistatic backing by the coating antistatic agent, in the antistatic composition relevant with antistatic agent, as the static electricity resistance inserts, can use various metallic elements such as containing aluminium, silver, gold, nickel, stainless steel, copper, iron, chromium, titanium, cobalt, molybdenum, platinum, tungsten, tantalum, niobium, palladium, soldering alloy, nickel-chromium alloy, nickel-chromium-ferro alloy, copper-manganese-nickel alloy, nickel-manganese-ferroalloy, copper-nickel alloy or contain the metal dust or the metallic fiber of the alloy (copper alloy etc.) of various metallic elements; Contain zinc oxide, indium oxide, titanium oxide, titanium black etc. metal oxide powder or metal-oxide fiber; Alkynes is black, ケ Star チ エ Application is deceived carbon dust or the carbon fiber that (Kitchen Black), native graphite, Delanium, carbon black etc. are made of material with carbon element; Polypyrrole, polyaniline, polyacetylene, polythiophene, polyhenylene ethenylidene (Port リ Off エ ニ レ Application PVC ニ レ Application), polyphenyl be the conducting polymer particle that constitutes such as (Port リ ア セ Application) conducting polymer and by the particle of various materials such as these powder, fiber or particle (metallic element and alloy, metal oxide, material with carbon element, electric conductive polymer etc.) lining (for example the particulate that is made of the copper or the silver of the noble metal that has been covered etc.) also.In the antistatic composition relevant with antistatic agent, for not special restriction such as cationic antistatic agent, anionic antistatic agent, non-ionic antistatic agent, amphoteric ion type antistatic agent, can from known cationic antistatic agent, known anionic antistatic agent, known non-ionic antistatic agent, known amphoteric ion type antistatic agent etc., suitably select separately.Antistatic compositions such as static electricity resistance inserts can be used in combination separately or more than 2 kinds or 2 kinds.
For employed adhesives of antistatic composition such as the aforementioned static electricity resistance inserts of dispersion, have no particular limits, can use as radiation cure type resins such as thermoplastic resins such as polyester, polyamide, acrylic resin, polyurethane or ultraviolet hardening acrylic resin (for example, ultraviolet curing resin etc.).Adhesive can be used in combination separately or more than 2 kinds or 2 kinds.
Such antistatic agent (antistatic composition such as static electricity resistance inserts is scattered in the antistatic agent in the adhesive) can be applied to the antistatic backing that is made of antistatic agent that forms with coating method known and even that custom is used on base material face (for example, the single face of base material etc.) etc. on, and dryly just can form antistatic backing.And, after being pre-formed by the sheet that adhesive constituted that has disperseed antistatic compositions such as static electricity resistance inserts, this sheet lamination is formed on the face (for example single face of base material) of antistatic backing to base material, also can form the antistatic backing of having used antistatic agent.Be when forming antistatic backing, as required, can also adopt various adhesion means such as using bonding agent again.
Thickness for antistatic backing has no particular limits, can, for example, select in 0.01～10 μ m (preferred 0.04～5 μ m) scope.Be that the thickness of metal evaporation layer is generally 0.01～2 μ m (preferred 0.04～1 μ m) again.During less than 0.01 μ m, the situation that can not get abundant anti-static effect is arranged at the thickness of antistatic backing, on the other hand, greater than 10 μ m the time, excessive, uneconomical economically.
In the peeling liner of the present invention, at base material, form the occasion of concave-convex surface peel ply on end liner layer and the antistatic backing, the constituent ratio of the thickness of each layer in the laminated structure, be the thickness of base material, or the thickness of (in that the occasion of antistatic backing is arranged) base material and antistatic backing, the ratio [(thickness of base material+antistatic backing): (thickness of concave-convex surface peel ply+end liner layer)] of the thickness of the concave-convex surface peel ply that forms with any one side or the thickness of (in the occasion that the end liner layer is arranged) concave-convex surface peel ply and end liner layer at this base material, be preferably 9: 1～6: 4, more preferably 8: 2～7: 3.The thickness of the thickness of concave-convex surface peel ply or concave-convex surface peel ply and end liner layer and the thickness of base material, or the thickness of base material and antistatic backing is compared when blocked up, behind laminating molding, because the influence that polythene material shrinks, making peeling liner produce crispaturas, be used for the occasion of HDD with the peeling liner of pressure-sensitive adhesive tape (or sheet), carry out fine punch process etc. and add man-hour, can be to the obstacle that produces of operation, elongation owing to the polyethylene kind material during punch process becomes big, make cutting performance descend, become and be drawn into the such machining shape of segment, therefore not preferred.
Gross thickness for peeling liner has no particular limits, preferred 40～150 μ m, more preferably 50～120 μ m.Peeling liner only simultaneously has the occasion of concave-convex surface peel ply at base material, the gross thickness of peeling liner is preferably 40～100 μ m, more preferably 50～100 μ m.The gross thickness of peeling liner as the occasion of HDD with the peeling liner of pressure-sensitive adhesive tape (or sheet), just can fully be guaranteed overburden operation and cut-out processability in this scope the time.
Such peeling liner can be used for protecting the pressure-sensitive bond layer in pressure-sensitive adhesive tape or the sheet to use shown in Fig. 4 (a)～(b) and Fig. 5 (a)～(b).Fig. 4～5th, part shows the section synoptic diagram of the example of the pressure-sensitive adhesive tape (or sheet) that uses peeling liner of the present invention.Fig. 4 (a) and (b), Fig. 5 (a) and (b) in, the 5th, pressure-sensitive bond layer, the 6th, support base material (pressure-sensitive adhesive tape support base material), 7,7a, 7b, 7c be pressure-sensitive adhesive tape.Also have, 1～4,4b, 4c as before, the 1st, base material, the 2nd, end liner layer, the 3rd, concave-convex surface peel ply, 4,4b, 4c be peeling liner.Pressure-sensitive adhesive tape 7 shown in Fig. 4 (a) is pressure-sensitive bond layer 5 to be set on the support base material 6 and then to engage such lamination peeling liner 4 with pressure-sensitive bond layer 5 according to concave-convex surface peel ply 3 on this pressure-sensitive bond layer 5.In addition, the pressure-sensitive adhesive tape 7a shown in Fig. 4 (b) is being provided with pressure-sensitive bond layer 5 and then is engaging such lamination peeling liner 4b with pressure-sensitive bond layer 5 according to concave-convex surface peel ply 3 on this pressure-sensitive bond layer 5 on the support base material 6.Pressure-sensitive adhesive tape 7b shown in Fig. 5 (a) is being provided with pressure-sensitive bond layer 5 and then is engaging such lamination peeling liner 4c with pressure-sensitive bond layer 5 according to concave-convex surface peel ply 3 on this pressure-sensitive bond layer 5 on the support base material 6.Pressure-sensitive adhesive tape 7d shown in Fig. 5 (b) engages such lamination peeling liner 4c on the two sides of pressure-sensitive bond layer 5 according to concave-convex surface peel ply 3 with pressure-sensitive bond layer 5.
[pressure-sensitive adhesive tape or sheet]
As pressure-sensitive adhesive tape of the present invention or sheet, such as shown in Figure 4 and Figure 5, have on pressure-sensitive bond layer 5 with aforementioned peeling liner (4,4b, concave-convex surface peel ply 3 4c) engage with pressure-sensitive bond layer 5 the aforementioned peeling liner of such lamination (4,4b, form 4c).And (7,7a 7b) is pressure-sensitive adhesive tape that has the base material type or the sheet with form of support base material 6 and pressure-sensitive bond layer 5 laminations for the pressure-sensitive adhesive tape of Fig. 4 (a)～(b), Fig. 5 (a) or sheet.Also have, the pressure-sensitive adhesive tape of Fig. 5 (b) or sheet 7c are no base material type pressure-sensitive adhesive tape or the adhesive sheets that the form of pressure-sensitive bond layer 5 is only arranged.
(support base material)
As the support base material in pressure-sensitive adhesive tape or the sheet, can use, for example, the plastic foil that constitutes such as thermoplastic resins such as styrene resins such as polyester, polystyrene, polyvinyl chloride such as high density polyethylene (HDPE), low density polyethylene (LDPE), LLDPE, polypropylene, poly--vistanexes such as 4-methylpentene-1, PETG or sheet with and foams; Metal formings such as aluminium foil, stainless steel foil, Copper Foil; And their laminate.As described laminate, enumerated, for example, the polyester film that PETG etc. constitute and the laminate (polyester film/metal forming, polyester film/metal forming/polyester film etc.) of metal formings such as aluminium foil or Copper Foil.The thickness of support base material can suitably be selected in not damaging the scope of usability etc., is generally 5～300 μ m, preferred 10～200 μ m.
(pressure-sensitive bond layer)
As the pressure-sensitive bonding agent that constitutes the pressure-sensitive bond layer in pressure-sensitive adhesive tape or the sheet, can select to use various pressure-sensitive bonding agents, what enumerate as a kind of preferred pressure-sensitive bonding agent is poly-(methyl) esters of acrylic acid bonding agent (acrylic-based adhesives).This bonding agent is host by the acrylic polymer that obtains with polymerizations such as solution polymerization process, emulsion polymerizations and adds various additives such as crosslinking agent, tackifier, softening agent, age resistor, filler as required and modulate.Aforesaid propylene acids polymer be by, for example, (methyl) alkyl acrylates such as (methyl) ethyl acrylate, (methyl) butyl acrylate, (methyl) 2-ethylhexyl acrylate [preferred carbon number 5 or 5 following (methyl) acrylate] are main component and add therein as required as can modification by copolymerization making with the copolymerization of the monomer mixture of other monomers such as monomer (methyl) acrylic acid 2-hydroxyethyl ester, (methyl) acrylic acid, styrene, vinyl acetate.With the acrylic-based adhesives of these acrylic polymers, obtained the extremely good result of fissility as host.
Form for the pressure-sensitive bonding agent has no particular limits, and aspect serviceability, general form is dicyandiamide solution, emulsion system, hot melt system forms such as (solvent-free systems).In addition, the various pressure-sensitive bonding agents of aforementioned acrylic compounds, so long as in the scope of not damaging as the performance of bonding agent, except independent use, can also use by the bonding agent more than 2 kinds or 2 kinds adopt always known method to mix, to stir the blend that forms also passable.
The pressure-sensitive bond layer can be by being coated on the bonding agent of dicyandiamide solution, emulsion system or hot melt system etc. for example, and the back drying forms on the support base material.And, when forming the pressure-sensitive bond layer, the pressure-sensitive bonding agent that constitutes the pressure-sensitive bond layer directly is coated on the occasion that forms on the concave-convex surface peel ply, owing to can there be the situation that can not obtain good stripping performance, so make pressure-sensitive adhesive tape or sheet serves as preferred with peeling liner in the form applying that on support base material, forms after the pressure-sensitive bond layer, contacts with the concave-convex surface peel ply with the pressure-sensitive bond layer.
The thickness of pressure-sensitive bond layer is 10～200 μ m (preferred 20～150 μ m).
Pressure-sensitive adhesive tape of the present invention or sheet are not limited in above-mentioned form, can adopt various forms.Pressure-sensitive adhesive tape or sheet have only single face be the pressure-sensitive adhesive tape of adhesive surface or sheet (single face adhesive tape or sheet) or two sides all become the pressure-sensitive adhesive tape or the sheet (double-faced adhesive tape or sheet) of adhesive surface can.In addition, in the occasion of double-faced adhesive tape or sheet, be the double-faced adhesive tape or the sheet (base material double-sided adhesive tape or sheet are arranged) of support base material to be arranged or do not have the double-faced adhesive tape of support base material or the sheet (no base material double-sided adhesive tape or sheet) can.
In such pressure-sensitive adhesive tape or sheet, use 1 peeling liner that the concave-convex surface peel ply is arranged at least.For example, pressure-sensitive adhesive tape or sheet are the occasion of single face adhesive tape or sheet, use 1 peeling liner.On the other hand, be the occasion of double-faced adhesive tape or sheet at pressure-sensitive adhesive tape or sheet, being to use 2 peeling liners also to be to use 1 its two sides all to become the peeling liner on concave-convex surface peel ply surface can.
Pressure-sensitive adhesive tape of the present invention or sheet, for example, as field of electronic materials particularly no polysiloxanes adhesive tape or the sheet used of the hard disk drive of computer be of great use.
[embodiment]
Use the embodiment that is put down in writing that the present invention more specifically is described below, still, the present invention is not subjected to any restriction of these embodiment.Be that part of mentioning below is meant weight portion again.
(embodiment 1)
The PETG film (trade name " Le ミ ラ-S-105-50 ", eastern レ company makes; Thickness 50 μ m; Base material) on, be low density polyethylene (LDPE) (manufacturing of trade name " L-1850A " サ of Asahi Chemical Industry Application テ Star Network company) to extrude lamination under 325 ℃ to get in temperature under the die head with tandem moor, forming dry back thickness is the end liner layer of 10 μ m.Then, on this end liner layer under die head temperature be 273 ℃ of following extruding layers press by with respect to 100 parts of hybrid resins (trade name " モ ア テ Star Network 0628D ", bright dipping petrochemistry company makes; Ethylene-propylene copolymer (the trade name " Off マ-P0180 " of having mixed 300 parts the hybrid resin that has added the low density polyethylene (LDPE) of 15 (wt) % in the straight-chain low density polyethylene), the manufacturing of Mitsui Chemicals company) resin combination (peel ply constituent), forming dry back thickness is the peel ply of 10 μ m, and then, with the cooling surface matte roll of having implemented embossing processing as chill roll, implement micro concavo-convex processing on the peel ply surface, form the peel ply (concave-convex surface peel ply) of concaveconvex shape on the surface, make peeling liner.
The concaveconvex shape of described concave-convex surface peel ply is the shape of irregular difform each jog with the relation configuration of irregular position.In this concave-convex surface peel ply, its surperficial surface roughness Ra is 1.5 μ m, and maximal roughness is 4 μ m.
Described peeling liner is that (thickness of PETG film: the thickness of laminated resin layer), gross thickness was 70 μ m in 5: 2 as the thickness constituent ratio of the PETG film of base material and laminated resin layer (end liner layer and peel ply).
On the other hand, is n-butyl acrylate that 93 parts, acrylic acid are 7 parts, by ethyl acetate is that solvent, azodiisobutyronitrile are initator, carries out polymerisation in solution with usual way, has obtained weight average molecular weight and be 1,500,000 acrylic polymer solution (solid component concentration is 25 (wt) %).In this solution, cooperate 2 parts ratio to add crosslinking agent (trade name " コ ロ ネ-ト L " in per 100 parts of acrylic polymers, Japanese polyurethane company makes, the cresylene vulcabond addition product of trimethylolpropane), as the solution (acrylic compounds pressure-sensitive bonding agent) of adhesive composition.
(thickness: 50 μ m), 140 ℃ of dryings 3 minutes, forming thickness was the adhesive composition layer (pressure-sensitive bond layer) of 25 μ m at the PETG film this adhesive composition solution coat.On its adhesive surface (surface of pressure-sensitive bond layer), stick above-mentioned peeling liner, make with peel ply to engage, make pressure-sensitive adhesive tape.
(embodiment 2)
Except using with respect to 100 parts of hybrid resins (trade name " モ ア テ Star Network 0628D ", the manufacturing of bright dipping petrochemistry company; Ethylene-propylene copolymer (the trade name " Off マ-P0180 " of having mixed 100 parts the hybrid resin that has added the low density polyethylene (LDPE) of 15 (wt) % in the straight-chain low density polyethylene), three also chemical company's manufacturings) resin combination is for constituting the composition of peel ply, and forming its surface roughness Ra with irregular difform each jog with the shape of irregular position relation configuration is 2 μ m, in addition, maximal roughness is outside the concave-convex surface peel ply of 8 μ m, has made peeling liner similarly to Example 1.
In addition, except with this peeling liner, with the embodiment 1 the same pressure-sensitive adhesive tape of making.
(comparative example 1)
Except using with respect to 100 parts of hybrid resins (trade name " モ ア テ Star Network 0628D ", the manufacturing of bright dipping petrochemistry company; Ethylene-propylene copolymer (the trade name " Off マ-P0180 " of having mixed 10 parts the hybrid resin that has added the low density polyethylene (LDPE) of 15 (wt) % in the straight-chain low density polyethylene), the manufacturing of Mitsui Chemicals company) resin combination is for constituting the composition of peel ply, and to be chill roll with the roller of milling implement to have made peeling liner similarly to Example 1 outside the micro concavo-convex processing on the peel ply surface.
Except with this peeling liner, with the embodiment 1 the same pressure-sensitive adhesive tape of making.
(evaluation)
The peeling liner and the pressure-sensitive adhesive tape that relate to for embodiment 1～2 and comparative example 1 with following fissility test method, are measured the resistance (so-called " peeling force ") when pressure-sensitive adhesive tape peels off peeling liner, with the stripping performance of evaluation peeling liner.Table 1 shows evaluation result.
[fissility test]
It is wide and make test piece that pressure-sensitive adhesive tape is cut into 50mm, in 23 ℃, the atmosphere of 60%RH, is peeling liner one side of the test piece of made that the speed of 1m/min peel off in 180 ° of directions with crosshead speed with universal tensile testing machine, resistance when mensuration is peeled off (peeling force), unit are N/50mm.Provided measurement result in " peeling force " hurdle of table 1.
Table 1
| | | Comparative example 1 | |
| Peeling force (N/50mm) | 0.2 | 0.2 | 1.0 |
(embodiment 3)
On one side, have the evaporation layer of aluminium the PETG film (trade name " メ Le ミ-TS ", eastern メ company makes; Thickness 50 μ m; On the surface of aluminium-vapour deposition layer base material), use tandem moor low density polyethylene (LDPE) [density: 0.918g/cm
3, melt flow index (MFR): 5.0g/10min (190 ℃); Trade name: L-1850A, the サ of Asahi Chemical Industry Application テ Star Network company makes] under die head, extrude lamination under 325 ℃ of the temperature, forming dry back thickness is the end liner layer of 10 μ m.Then, on this end liner layer, use with respect to 100 parts of hybrid resin (density 0.916g/cm
3, MFR:6.0g/10min (190 ℃), trade name " モ ア テ Star Network 0628D ", bright dipping petrochemistry company makes; Ethylene-propylene copolymer (the density: 0.88g/cm of having mixed 300 parts the hybrid resin that has added the low density polyethylene (LDPE) of 15 (wt) % in the straight-chain low density polyethylene)
3MFR:4.5g/10min (190 ℃), trade name " Off マ-P0180 ", Mitsui Chemicals company makes) resin combination (constituent of peel ply), under die head, extrude lamination under 273 ℃ of the temperature, forming dry back thickness is the peel ply of 10 μ m, and then with the cooling surface matte roll of having implemented embossing processing as chill roll, implement micro concavo-convex processing on the peel ply surface, form the peel ply (concave-convex surface peel ply) of concave-convex surface shape, made peeling liner.
And the concaveconvex shape of described concave-convex surface peel ply is the shape of irregular difform each jog with the relation configuration of irregular position.In this concave-convex surface peel ply, its surperficial surface roughness Ra is 1.5 μ m, and maximal roughness is 4 μ m.
In addition, described peeling liner, as the thickness constituent ratio of the PETG film with aluminium-vapour deposition layer of its base material and laminated resin layer (end liner layer and peel ply) is that (thickness with PETG film of aluminium-vapour deposition layer: the thickness of laminated resin layer), gross thickness was 70 μ m in 5: 2.
On the other hand, is n-butyl acrylate that 93 parts, acrylic acid are 7 parts, by ethyl acetate is that solvent, azodiisobutyronitrile are initator, carries out polymerisation in solution with usual way, has obtained weight average molecular weight and be 1,500,000 acrylic polymer solution (solid component concentration is 25 (wt) %).In this solution, in per 100 parts of acrylic polymers is that 2 parts ratio cooperates crosslinking agent (trade name " コ ロ ネ-ト L ", Japanese polyurethane company makes, the cresylene vulcabond addition product of trimethylolpropane), as the solution (acrylic compounds pressure-sensitive bonding agent) of adhesive composition.
9 μ m)/aluminium foil (thickness: 7 μ m)/PETG film (thickness: the lamination support base material (gross thickness: 31 μ m that constitutes of layer 9 μ m) this adhesive composition solution coat there is being PETG film (thickness:; By using the dried laminating lamination of bonding agent) on, 140 ℃ of dryings 3 minutes, forming thickness was the adhesive composition layer (pressure-sensitive bond layer) of 25 μ m.On its bonding plane (surface of pressure-sensitive bond layer), stick above-mentioned peeling liner, make with peel ply to engage, make pressure-sensitive adhesive tape.
(embodiment 4)
Except using with respect to 100 parts of hybrid resin (density 0.916g/cm
3, MFR:6.0g/10min (190 ℃), trade name " モ ア テ Star Network 0628D ", bright dipping petrochemistry company makes; The hybrid resin that has added the low density polyethylene (LDPE) of 15 (wt) % in the straight-chain low density polyethylene) (density is 0.88g/cm to have mixed 100 parts ethylene-propylene copolymer in
3MFR:4.5g/10min (190 ℃), trade name " Off マ-P0180 ", the manufacturing of Mitsui Chemicals company) resin combination is as the composition that constitutes peel ply, and with irregular difform each jog with the relation configuration of irregular position form its surface roughness Ra be 2 μ m and maximal roughness be 8 μ m the concave-convex surface peel ply outside, made peeling liner similarly to Example 3.
Except with this peeling liner, with the embodiment 1 the same pressure-sensitive adhesive tape of making.
(comparative example 2)
Except using with respect to 100 parts of hybrid resin (density 0.916g/cm
3, MFR:6.0g/10min (190 ℃), trade name " モ ア テ Star Network 0628D ", bright dipping petrochemistry company makes; The hybrid resin that has added the low density polyethylene (LDPE) of 15 (wt) % in the straight-chain low density polyethylene) (density is 0.88g/cm to mix 10 parts ethylene-propylene copolymer in
3MFR is 4.5g/10min (190 ℃), trade name " Off マ-P0180 ", the manufacturing of Mitsui Chemicals company) resin combination is for constituting the composition of peel ply, and roller is implemented on the peel ply surface to have made peeling liner similarly to Example 3 outside the micro concavo-convex processing as chill roll with milling.
Except with this peeling liner, with the embodiment 3 the same pressure-sensitive adhesive tapes of making.
(evaluation)
The peeling liner and the pressure-sensitive adhesive tape that relate to for embodiment 3～4 and comparative example 2, with the resistance (so-called " peeling force ") of aforesaid fissility determination of test method when pressure-sensitive adhesive tape peels off peeling liner, to estimate the stripping performance of peeling liner, simultaneously, be determined at the electric weight (stripping charge amount) that when pressure-sensitive adhesive tape peels off peeling liner, is produced with following stripping charge quantity measuring method, to estimate the antistatic jamming performance of peeling liner.Table 2 shows evaluation result.
[stripping charge quantitative determination]
Pressure-sensitive adhesive tape be cut into 50mm wide * 150mm is long, in 25 ℃, the atmosphere of 65%RH, peeling liner is peeled off from pressure-sensitive adhesive tape with the speed of 2m/min, with surface potential detection instrument (digital oscilloscope, trade name DS-8812, IWATSU society makes) measure when peeling off this peeling liner in the surperficial stripping charge amount that produces of peel ply.Be that the surface potential detection of this moment is to leave peeling liner surface (peel ply surface) 5mm with the height of probe again.
Table 2
| | | Comparative example 2 | |
| Peeling force (N/50mm) | 0.2 | 0.2 | 0.4 |
| Stripping charge amount (V) | 20 | 20 | 400 |
As shown in Table 1, the pressure-sensitive adhesive tape that embodiments of the invention 1 and 2 relate to is compared with the splicing tape that is related to by comparative example 1, as remover, what use is not the polysiloxane-based remover of high price but cheap polyolefin resin, do not have as with the occasion of polysiloxane-based remover, polluting hard disk drive, and can peel off by very suitable land productivity, during stickup with " High-Speed Automatic mechanical sticker " the corresponding possibility that become.
Also have, as can be known from the results of Table 2, the pressure-sensitive adhesive tape that embodiments of the invention 3 and 4 relate to is compared with the splicing tape that is related to by comparative example 3, good smooth fissility is arranged, when peeling off peeling liner, reduced the voltage levvl (that is stripping charge amount) of stripping charge.
Claims (11)
1. peeling liner, this peeling liner is the peeling liner with the peel ply that is formed by polyolefin resin, it is characterized in that, and the peel ply surface has concaveconvex shape, and wherein the surface roughness Ra on peel ply surface is 1～3 μ m.。
2. according to the described peeling liner of claim 1, wherein the concaveconvex shape on peel ply surface is the concaveconvex shape of irregular difform each jog with the jog formation of the form of irregular position relation configuration.
3. according to the described peeling liner of claim 1, wherein constituting the polyolefin resin of peel ply, is at least a polyolefin resin that is selected from the copolymer that polyethylene, polypropylene, polybutene, poly-(4-methyl-1-pentene) and ethene and carbon number are 3～10 alpha-olefin.
4. according to the described peeling liner of claim 1, wherein peel ply has on base material directly or is the structure of intermediary's lamination with other layers.
5. according to the described peeling liner of claim 1, wherein in the one side at least of base material or base material, has the antistatic processing layer.
6. according to the described peeling liner of claim 5, wherein antistatic backing is metal foil layer or metal evaporation layer.
7. pressure-sensitive adhesive tape or sheet, it is pressure-sensitive adhesive tape or the sheet with pressure-sensitive bond layer, it is characterized in that, the mode that engages with peel ply with the pressure-sensitive bond layer with each described peeling liner lamination in the claim 1～6 to the pressure-sensitive bond layer.
8. according to described pressure-sensitive adhesive tape of claim 7 or sheet, wherein the pressure-sensitive bond layer is formed by acrylic adhesives.
9. according to described pressure-sensitive adhesive tape of claim 7 or sheet, it has the structure of applying peeling liner on the pressure-sensitive bond layer, and described pressure-sensitive bond layer is supporting that applying the pressure-sensitive bonding agent on the base material forms.
10. according to described pressure-sensitive adhesive tape of claim 8 or sheet, it has the structure of applying peeling liner on the pressure-sensitive bond layer, and described pressure-sensitive bond layer is supporting that applying the pressure-sensitive bonding agent on the base material forms.
11. according to described pressure-sensitive adhesive tape of claim 7～10 or sheet, it is pressure-sensitive adhesive tape or sheet that hard disk drive is used.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP145085/04 | 2004-05-14 | ||
| JP2004145085 | 2004-05-14 | ||
| JP040246/05 | 2005-02-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1704237A CN1704237A (en) | 2005-12-07 |
| CN100345678C true CN100345678C (en) | 2007-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100704852A Active CN100345678C (en) | 2004-05-14 | 2005-05-13 | Release liner and pressure-sensitive adhesive tape or sheet employing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100345678C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007129711A1 (en) * | 2006-05-09 | 2007-11-15 | Hitachi Chemical Company, Ltd. | Adhesive sheet, and connecting structure for circuit member and semiconductor device which use the adhesive sheet |
| JP5005277B2 (en) * | 2006-07-13 | 2012-08-22 | 日東電工株式会社 | Patches and patch preparations |
| JP5305595B2 (en) * | 2007-01-10 | 2013-10-02 | 日東電工株式会社 | Thermal adhesive sheet |
| JP4430085B2 (en) * | 2007-03-01 | 2010-03-10 | 日東電工株式会社 | Dicing die bond film |
| JP5199250B2 (en) * | 2007-05-07 | 2013-05-15 | リンテック株式会社 | Adhesive sheet |
| JP5243990B2 (en) * | 2009-02-18 | 2013-07-24 | 日東電工株式会社 | Double-sided adhesive sheet |
| CN103183871A (en) * | 2011-12-31 | 2013-07-03 | 北京化工大学 | Polypropylene based resin composition for leather release paper, and preparation method and application thereof |
| KR102089231B1 (en) * | 2012-04-10 | 2020-03-13 | 도요보 가부시키가이샤 | Self-adhesive surface protection film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002219778A (en) * | 2001-01-25 | 2002-08-06 | Daikyo Giken Kogyo Kk | Release material, manufacturing method therefor and adhesive article |
| CN1414053A (en) * | 2001-10-23 | 2003-04-30 | 日东电工株式会社 | Stripped lining and its pressure-sensitive adhesive band or flat |
| CN1424371A (en) * | 2001-12-14 | 2003-06-18 | 日东电工株式会社 | Decohesion lining and pressure-sensitive adhesive therewith |
-
2005
- 2005-05-13 CN CNB2005100704852A patent/CN100345678C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002219778A (en) * | 2001-01-25 | 2002-08-06 | Daikyo Giken Kogyo Kk | Release material, manufacturing method therefor and adhesive article |
| CN1414053A (en) * | 2001-10-23 | 2003-04-30 | 日东电工株式会社 | Stripped lining and its pressure-sensitive adhesive band or flat |
| CN1424371A (en) * | 2001-12-14 | 2003-06-18 | 日东电工株式会社 | Decohesion lining and pressure-sensitive adhesive therewith |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1704237A (en) | 2005-12-07 |
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