CN103254810A - Surface protection sheet - Google Patents
Surface protection sheet Download PDFInfo
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- CN103254810A CN103254810A CN2012100361250A CN201210036125A CN103254810A CN 103254810 A CN103254810 A CN 103254810A CN 2012100361250 A CN2012100361250 A CN 2012100361250A CN 201210036125 A CN201210036125 A CN 201210036125A CN 103254810 A CN103254810 A CN 103254810A
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- protective plate
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Abstract
The invention provides a surface protection sheet. The surface protection sheet has the advantages of no fracture or floatation during metal bending processing, good operationality and excellent anchoring effect. The invention also provides a bending processing method of a metal plate using the surface protection sheet. The surface protection sheet is obtained through forming an adhesive layer on one surface of a substrate layer of a resin mixture formed by low-density polyethylene and an ethylene-alpha-olefin copolymer, the theoretic substrate density obtained through calculating according to the respective densities of low-density polyethylene and the ethylene-alpha-olefin copolymer and a mixing ratio is 0.905-0.915g/cm<3>, and the machine-direction (MD) and transverse-direction (TD) Elmendorf tear strength, the MD/TD tear strength ratio and the largest MD and TD stress of the surface protection sheet are 0.1-0.9N, 0.2-2.0 and 20-30MPa respectively.
Description
Technical field
The present invention relates to a kind of surface protective plate.Specifically; the present invention relates to the surface protective plate that can in following purposes etc., use; namely; for example to metal sheet, application member such as metal sheet, aluminum alloy frame, resin board, decorative steel plate, vinylchlorid laminate steel, sheet glass carry, when processing or maintenance etc., be attached to these component surface and protected.
Background technology
Proposed in supporting substrate, to contain the surface protective plate (for example with reference to patent documentation 1) of the metal bending excellent in workability of ethene-alpha-olefin copolymer.It is resin that this surface protective plate contains the above ethene-alpha-olefin of 50 weight %, thereby the surface protective plate fracture can not produce bending machining the time.But, existing problems aspect operability.Specifically, after metal sheet sticks surface protective plate, need cut off surface protective plate when pasting greatlyyer than metal sheet or when pasting the metal veneer, yet this surface protective plate has the problem cut off well of being difficult to.
In addition, the surface protective plate (for example with reference to patent documentation 2) that bonding coat comprises polyethylene and styrene series elastomer was proposed.But, substrate layer is being made as under the situation of independent Low Density Polyethylene, add man-hour in the fracture that stress concentration portion causes surface protective plate at metal bending, have the not situation of good situation of generation.In addition, in substrate layer, use under the situation of mixture of Low Density Polyethylene and ethene-alpha-olefin copolymer, same as described above, have the situation of the reduction that causes operability.In addition, it is poor to throw anchor in this kind bonding coat, is easy to generate the glue trace.Though can handle to improve this kind problem by implementing linging, produce sometimes by linging handle the detrimentally affect to the adhesive tape characteristic that causes, operation complicated, to by other problem such as the pollution of adherend.
On the other hand, as the good binder constituents of separability, hydride and the olefin copolymer (for example with reference to patent documentation 3 and patent documentation 4) of the random copolymers that is made of vinylbenzene and diene composition proposed.Though these binder constituents demonstrate good throwing anchor for polypropylene base, however low for the throwing anchor of polyethylene-based base material.Particularly, utilizing solution coat mode or hot melting way to form under the situation of bonding coat, throw anchor and obviously reduce, thereby have the problem that produces the glue trace.
The prior art document
Patent documentation
Patent documentation 1 Japanese kokai publication hei 8-60112 communique
Patent documentation 2 TOHKEMY 2002-302657 communiques
Patent documentation 3 Japanese kokai publication hei 10-176145 communiques
Patent documentation 4 TOHKEMY 2002-302659 communiques
The man-hour of surface protective plate fracture and operability add to(for) metal bending are distinguished; though operability is good under the situation that base material is made of Low Density Polyethylene; yet the surface protective plate fracture can take place; on the contrary; under the situation that base material is made of ethene-alpha-olefin copolymer; the surface protective plate fracture can not take place, yet operability reduces obviously.Also distinguish in addition; adopting under the hydride and the situation of olefin copolymer as tackiness agent of the random copolymers that is constituted by vinylbenzene and diene composition in order to improve the throwing anchor; if be located on the polypropylene base, then have the problem of floating that produces surface protective plate because of the influence of the hardness of base material.Distinguish on the other hand, if be located on the good soft polypropylene base material of flexibility, though can be improved the problem of floating that produces surface protective plate, have the problem that operability reduces.
Summary of the invention
The objective of the invention is to, a kind of surface protective plate is provided, it does not have metal bending and adds the surface protective plate fracture in man-hour or float, and operability is good, and throws the anchor excellence.In addition, purpose also is, the bend processing method of the metal sheet that has used this kind surface protective plate is provided.
Surface protective plate of the present invention is the surface protective plate that is formed with bonding coat in the one side that contains the substrate layer of the resin compound that is made of Low Density Polyethylene and ethene-alpha-olefin copolymer as principal constituent,
The theoretical base material density of being calculated by the density separately of this Low Density Polyethylene and this ethene-alpha-olefin copolymer and mixture ratio is 0.905～0.915g/cm
3,
The love Er Mendaofu tear strength of vertical (MD) of this surface protective plate and horizontal (TD) is 0.1～0.9N, and tear strength is 0.2～2.0 than (MD/TD), and maximum stress (MD and TD) is 20～30MPa.
In preferred embodiment, it is that-40～-25 ℃ hydrogenated styrene based elastomers and (2) comprise propylene, are selected from least a kind in the propylene series copolymer that carbon number is at least a kind of alpha-olefin in 4～12 the alpha-olefin and ethene as copolymer composition that above-mentioned bonding coat contains the maximum temperature of tan δ value that is selected from (1) Measurement of Dynamic Viscoelasticity in-65～80 ℃ mensuration temperature range.
In preferred embodiment, above-mentioned substrate layer contains carbon black.
In preferred embodiment, above-mentioned ethene-alpha-olefin copolymer is ethylene-octene copolymer.
In preferred embodiment, utilize coextrusion to form above-mentioned substrate layer and above-mentioned bonding coat.
The bend processing method of metal sheet is provided according to another aspect of the present invention.The bend processing method of metal sheet of the present invention uses the surface protective plate described in the present invention.
According to surface protective plate of the present invention; because by making substrate layer contain the resin compound that is constituted by Low Density Polyethylene and ethene-alpha-olefin copolymer as principal constituent; just can give the flexibility of appropriateness; therefore can play following effect; namely; when preventing that metal bending from adding the surface protective plate fracture in man-hour, also can not produce and float etc.
The theoretical base material density that the density separately of contained Low Density Polyethylene and ethene-alpha-olefin copolymer and mixture ratio calculate in by substrate layer is 0.905～0.915g/cm
3Situation under, can play thin slice fracture and prevent from effect and float preventing the outstanding effect effect.
Reaching laterally by vertical (MD) that makes surface protective plate, the love Er Mendaofu tear strength of (TD) is that 0.1～0.9N, maximum stress (MD and TD) are 20～30MPa; can play following effect; namely; when guaranteeing good operability, can prevent that metal bending from adding the surface protective plate fracture in man-hour.
Tear strength by making surface protective plate is 0.2～2.0 than (MD/TD), will play the effect that can obtain more good operability.For example, if tear strength is excessive longitudinally, then when longitudinally being cut off, surface protective plate is easy to generate hook.On the contrary, if horizontal tear strength is excessive, then surface protective plate is being easy to generate hook during along transversely cutting.So, by tear strength is made as 0.2～2.0 than (MD/TD), will play the effect that can obtain good operability.
Surface protection film of the present invention contains under the situation of specific hydrogenated styrene based elastomers, specific propylene series copolymer or their mixture at bonding coat, will play particularly throwing anchor excellence to polyethylene-based substrate layer, with metal sheet etc. by the binding property of adhesion material also very excellent effect.
Surface protection film of the present invention is utilizing coextrusion to form under the situation of substrate layer and bonding coat, will play the excellent especially effect of productivity.
The surface protective plate of the application of the invention just can provide the bend processing method of following metal sheet, that is, in the bending machining operation of metal sheet, protect the surface of this metal sheet well in, the operability excellence.
Embodiment
Surface protective plate of the present invention is formed with bonding coat in the one side that contains the substrate layer of the resin compound that is made of Low Density Polyethylene and ethene-alpha-olefin copolymer as principal constituent.Here said principal constituent is preferably more than the 50 weight %, more preferably more than the 70 weight %, more preferably more than the 80 weight %, is preferably especially more than the 90 weight %, most preferably is more than the 95 weight %.
Substrate layer both can be individual layer, also can be multilayer.
So-called Low Density Polyethylene refers to that density is 0.918g/cm
3～0.930g/cm
3Polyethylene, can adopt the appropriate polyethylene arbitrarily with this kind density.As this kind Low Density Polyethylene, specifically, for example can use Sumikasen (Sumitomo Mitsui polyolefins company system), ノ バ Star テ Network LD (Japanese Polychem corporate system), Petrocene commercially available products such as (Tosoh corporate systems).
So-called ethene-alpha-olefin copolymer is by ethene composition and at least a kind of multipolymer that the alpha-olefin composition constitutes.As the alpha-olefin composition, can enumerate 1-butylene, 1-amylene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-laurylene, 4-methyl-1-pentene, 4-methyl isophthalic acid-hexene etc.
Consider that from the viewpoint of giving flexibility the density of ethene-alpha-olefin copolymer is preferably 0.870～0.910g/cm
3The density of ethene-alpha-olefin copolymer is 0.880～0.890g/cm more preferably
3In the density of ethene-alpha-olefin copolymer less than 0.870g/cm
3Situation under, when film forming, can produce the adhesion phenomenon of resin, might produce the not good situation when making.In addition, the density at ethene-alpha-olefin copolymer surpasses 0.910g/cm
3Situation under, the flexibility of the substrate layer of gained might reduce.
As ethene-alpha-olefin copolymer, consider optimal ethylene-octene copolymer from just can give aspects such as flexibility with a spot of interpolation.As this kind ethylene-octene copolymer, specifically, can use Moatec (bright dipping petroleum chemistry corporate system), AFFINITY (Dow Chemical corporate system), EXACT commercially available products such as (Exxon Mobil corporate systems).Consider from the viewpoint that suppresses to be clamminess, most preferably utilize metallocene catalyst polymerisation ethylene-octene copolymer.
Be preferably as the Low Density Polyethylene in the resin compound of the principal constituent of substrate layer and the content of ethene-alpha-olefin copolymer, Low Density Polyethylene is 90～60 weight %, and ethene-alpha-olefin copolymer is 10～40 weight %, more preferably, Low Density Polyethylene is 85～70 weight %, and ethene-alpha-olefin copolymer is 15～30 weight %.Under the situation of content less than 10 weight % of ethene-alpha-olefin copolymer, might be easy to generate the surface protective plate fracture that metal bending adds man-hour.In addition, surpass under the situation of 40 weight % at the content of ethene-alpha-olefin copolymer, it is big that the love Er Mendaofu tear strength of surface protective plate becomes, and operability might reduce.
In surface protective plate of the present invention, be 0.905～0.915g/cm by the density separately of above-mentioned Low Density Polyethylene and above-mentioned ethene-alpha-olefin copolymer and the theoretical base material density of mixture ratio calculating
3, be preferably 0.906～0.914g/cm
3, 0.907～0.913g/cm more preferably
3Above-mentioned theory base material density is the following density of calculating, and, for example for the situation of the resin compound that comprises a kind of Low Density Polyethylene and a kind of ethene-alpha-olefin copolymer, is made as d1 (g/cm in the density with Low Density Polyethylene that is
3), the mixture ratio of Low Density Polyethylene is made as R1 (%), the density of ethene-alpha-olefin copolymer is made as d2 (g/cm
3), when the mixture ratio of ethene-alpha-olefin copolymer is made as R2 (%), can utilize (d1 * R1/100)+(d2 * R2/100) calculate.Be 0.905～0.915g/cm by making described theoretical base material density
3, just can provide can not produce metal bending add the surface protective plate fracture in man-hour or float, operability is good and throw the surface protective plate etc. of anchor excellence.
Also can in substrate layer, can not produce the not good situation that is caused by the surface protective plate fracture, the degree that can not reduce operability or throw anchor, cooperate other ethylene series resin.Other the use level of ethylene series resin of this kind is below the 5 weight % with respect to resin compound preferably.As other ethylene series resin of this kind, for example can enumerate acrylic polymers such as the block system that is constituted by polypropylene or propylene composition and ethene composition, random system; Ethylene-based polymers such as linea low density beyond low density, high-density, the octene composition; Olefin polymer of ethene such as ethylene vinyl acetate copolymer, ethylene methacrylic acid methyl terpolymer and other monomers etc.Other ethylene series resin of this kind both can only use a kind, also can use more than 2 kinds.
Substrate layer preferably comprises black pigment.As black pigment, can adopt appropriate arbitrarily black pigment.As this kind black pigment, for example can enumerate carbon black.Contain at substrate layer under the situation of black pigment, it contains proportional resinous principle with respect to the formation substrate layer and is preferably 0.01～10 weight %, more preferably 0.1～5 weight %.
In substrate layer, for preventing purposes such as deterioration, also can cooperate appropriate arbitrarily additive.As this kind additive, for example can enumerate oxidation inhibitor, UV light absorber, photostabilizer (for example hindered amine is photostabilizer), anti-electrostatic agent interfering, other weighting agent, pigment, preventing materials accumulation agent (order ヤ ニ prevents drug), lubricant, anti etc.The use level of this kind additive is below the 5 weight % with respect to resin compound preferably.
The thickness of substrate layer can be set at appropriate arbitrarily thickness according to purpose.This kind thickness is preferably 20～300 μ m, more preferably 30～250 μ m, more preferably 40～200 μ m.
Formation method as substrate layer can adopt appropriate methods arbitrarily.As this kind formation method, specifically, can enumerate films such as T die head method or blow moulding.Particularly, from making vertically approaching with horizontal tear strength aspect consideration, preferred blow moulding.In addition, under the situation of utilizing T die head method to carry out, in order as far as possible to produce orientation in direction, the preferred use reduced film forming speed, constriction die lip at interval and film forming, made methods such as die section and casting roll portion be approaching.By this kind method, can prevent orientation facing one direction, thereby can improve the operability of the surface protective plate of gained.
Tackiness agent used in the bonding coat can adopt appropriate arbitrarily tackiness agent.As this kind tackiness agent, for example can enumerate known rubber and be tackiness agent, acrylic adhesive, polyester is tackiness agent, polyurethane series tackiness agent, ethylene series tackiness agent etc.Particularly, consider from permanent stability, weathering resistance, the fusible viewpoint of uneven surface, among the present invention, preferred hydrogenated styrene based elastomers or propylene series copolymer.Tackiness agent used in the bonding coat can only be a kind both, also can be more than 2 kinds.
The hydrogenated styrene based elastomers is to comprise the segmented copolymer that is made of vinylbenzene and diene composition or the material of random copolymers, can enumerate the A-B type diblock polymer the multipolymer (SEP) of multipolymer (SEB) as styrene ethylene-butylene copolymer, styrene ethylene-propylene copolymer; The multi-block polymer that A-B-A type three blocks as styrene ethylene-butylene copolymer styrol copolymer (SEBS), styrene ethylene-propylene copolymer styrol copolymer (SEPS) or A-B-A-B type four blocks are above; The multipolymer of styrene ethylene-butene random copolymer (HSBR) etc.
Styrene content in the hydrogenated styrene based elastomers is preferably 5～40 weight %, more preferably 7～30 weight %, more preferably 9～20 weight %.If the styrene content in the hydrogenated styrene based elastomers is below the 5 weight %, then might be easy to generate the glue trace that is caused by the cohesive force deficiency.If the styrene content in the hydrogenated styrene based elastomers is more than the 40 weight %, then because independent hydrogenated styrene based elastomers is just very hard, therefore might be difficult to obtain binding property good for uneven surface.
The hydrogenated styrene based elastomers preferably maximum temperature of tan δ value of the Measurement of Dynamic Viscoelasticity in-65～80 ℃ mensuration temperature range is-40～-25 ℃.
Among the present invention, used hydrogenated styrene based elastomers in the formation as bonding coat uses the styrene based copolymer in the tan δ of the maximum that demonstrates Measurement of Dynamic Viscoelasticity than higher in the past temperature value.Among the present invention, because the temperature that shows maximum tan δ value raises, and the binding property of bonding coat is increased.In addition, be-40～-25 ℃ by the temperature regulation that will show maximum tan δ value, just can obtain wetting property and the low temperature adhesion of appropriateness.Thus, even bonding coat of the present invention does not add tackifier in large quantities, also can have enough wetting properties and binding property.So, can compress the interpolation of tackifier etc. seldom, thereby can suppress to peel off generation bad or the glue trace.Surface protective plate of the present invention with this kind bonding coat is by regulating the rerum natura of bonding coat, and is also bonding very well with uneven surface, even be applied under the situation on plane, can not produce yet peel off bad.In order to obtain more good wetting property and binding property, the maximum temperature of the tan δ value of above-mentioned Measurement of Dynamic Viscoelasticity is preferably-40～-30 ℃, more preferably-35～-27 ℃.Above-mentioned Measurement of Dynamic Viscoelasticity specifically according to be the record of embodiment.
Propylene series copolymer contains propylene, is selected from carbon number as copolymer composition is at least a kind of alpha-olefin and ethene in 4～12 the alpha-olefin.As the concrete example of alpha-olefin composition, for example can enumerate 1-butylene, 1-amylene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-laurylene, 4-methyl-1-pentene, 4-methyl isophthalic acid-hexene etc., yet be not limited thereto.In the middle of them, consider preferred 1-butylene, 1-hexene, 1-octene from good fusible aspect.
When forming bonding coat, for purposes such as control adhesion characteristics, can be as required, for example suitably adding tenderizer, ethylene series resin, silicone-based polymkeric substance, aqueous acrylic copolymer, phosphoric acid ester based compound, tackifier, protective agent, hindered amine is photostabilizer, UV light absorber, polymine, fatty acid amide, phosphoric acid ester, weighting agent or pigment additives such as (for example calcium oxide, magnesium oxide, silicon-dioxide, zinc oxide, titanium oxide etc.).
Also can be as required to bonding coat surface embodiment such as Corona discharge Treatment, uviolizing processing, flame treating, Cement Composite Treated by Plasma, sputter etching processing etc. with to fusible control or to attach operability etc. be the surface treatment of purpose.
The cooperation of tackifier is effective for improving bounding force.But, the generation of the glue trace problem that causes for fear of the reduction by cohesive force, with the use level that is suitably determined tackifier by adherend accordingly of application surface screening glass.For the use level of tackifier, with respect to tackiness agent used in the bonding coat, be preferably below the 50 weight %, more preferably below the 30 weight %, more preferably below the 10 weight %.And, the application surface screening glass be under the situation of metal sheet by adherend, preferably when forming bonding coat, do not add tackifier.
As tackifier, for example can use petroleum line resin, coumarone-indenes such as aliphatics based copolymer, aromatic series based copolymer, aliphatics aromatic series based copolymer system or ester ring type based copolymer is that resin, terpenic series resin, terpenes phenolic aldehyde are that rosin series resins such as resin, polymerized rosin, (alkyl) phenolic aldehyde are the material that resin, diformazan benzene series resin, their hydride etc. generally use in tackiness agent with being not particularly limited.Tackifier both can only use a kind, also can use more than 2 kinds.In the middle of these tackifier, consider the tackifier that preferred hydrogenation is from aspects such as separability or weathering resistances.And, the material that tackifier also can use conduct and the mixture of olefin resin to sell in market.
The cooperation of tenderizer is effective for improving bounding force.As tenderizer, for example can enumerate low-molecular-weight diene polymer, polyisobutene, hydrogenated polyisoprene, hydrogenated butadiene polymer, their derivative etc.As this kind derivative, for example can example be illustrated in the material that an end or two ends have OH base or COOH base, specifically, can enumerate hydrogenated butadiene polymer glycol, hydrogenated butadiene polymer single methanol, hydrogenated polyisoprene glycol, hydrogenated polyisoprene single methanol etc.Particularly, from suppressing considered the hydride of diene polymers such as preferred hydrogenated butadiene polymer or hydrogenated polyisoprene or ethylene series tenderizer etc. by the purpose of the fusible raising of adherend.As this kind tenderizer, specifically, can buy the trade(brand)name " Kuraprene LIR-200 " of (strain) Kuraray system etc.These tenderizers both can only use a kind, also can use more than 2 kinds.The use level of tenderizer is preferably below the 40 weight % with respect to tackiness agent used in the bonding coat, more preferably below the 20 weight %, more preferably below the 10 weight %.If the use level of tenderizer is more than the 40 weight % with respect to tackiness agent used in the bonding coat, then the glue trace when high temperature or outdoor exposure just might become obvious.
The molecular weight of tenderizer can suitably be set at appropriate arbitrarily amount, if yet molecular weight diminishes, then might cause from bonding coat to by the substance transfer of adherend or heavy peeling off etc., on the other hand, if the molecule quantitative change is big, then have the trend of the raising effect that lacks bounding force, so the number-average molecular weight of tenderizer is preferably 5000～100,000, more preferably 10,000～50,000.
The thickness of bonding coat is as long as suitably be set at appropriate arbitrarily thickness according to desired bounding force etc.The thickness of bonding coat is preferably 1～50 μ m, more preferably 2～40 μ m, more preferably 5～20 μ m.
Surface protective plate of the present invention can utilize arbitrarily appropriate methods to make.Surface protective plate of the present invention preferably by using the formation material that forms above-mentioned substrate layer and the formation material that forms above-mentioned bonding coat, utilizes coetrusion that substrate layer and bonding coat film forming are obtained.
As coetrusion, can wait to carry out according to blow moulding, the T die head method generally used in the thin film fabrication etc.Can implement above-mentioned surface treatment to substrate layer and bonding coat as required.
For bonding coat, also can be as required, before being used for practical application during, attach barrier film etc. temporarily and protected.And, the face of not setting up bonding coat for substrate layer, be easy to the purposes such as coiling body of uncoiling for formation, for example also can carry out the demoulding and handle or arrange the coating layer that comprises suitable stripper such as silicone-based, chain alkyl system, fluorine system by in substrate layer, adding fatty acid amide or polymine etc.
The love Er Mendaofu tear strength of vertical (MD) of surface protective plate of the present invention and horizontal (TD) is 0.1～0.9N, and tear strength is 0.2～2.0 than (MD/TD), and maximum stress (MD and TD) is 20～30MPa.
Like that the Er Mendaofu tear strength is the value of measuring according to JIS-K-7128-2.Tear strength than (MD/TD) be with the love Er Mendaofu tear strength of vertically (MD) with the love Er Mendaofu tear strength of laterally (TD) except and value.Vertical (MD) by making surface protective plate and laterally the love Er Mendaofu tear strength of (TD) be 0.1～0.9N, and tear strength is 0.2～2.0 than (MD/TD), just can obtain good operability.
Maximum stress (MD and TD) is to measure tensile strength according to JIS-K-7127, the value of obtaining as the maximum value of stress according to stress-strain curve.
Reaching laterally by vertical (MD) that makes surface protective plate, the love Er Mendaofu tear strength of (TD) is 0.1～0.9N; and maximum stress (MD and TD) is 20～30MPa, just can provide do not have metal bending add the surface protective plate fracture in man-hour or float, operability surface of good screening glass.In addition, by with the tear strength of surface protective plate than the scope that (MD/TD) is made as 0.2～2.0, just can obtain more good operability.
The viewpoint of floating after the inhibition bending machining considers that surface protective plate of the present invention preferably has the material of flexibility, and specifically, the initial stage Young's modulus of surface protective plate is preferably 110～300MPa.The material that the initial stage Young's modulus of surface protective plate surpasses 300MPa might lack flexibility, under the situation of the initial stage of surface protective plate Young's modulus less than 110MPa, might produce not good situation when metal sheet etc. carries out machinery stickup.The initial stage Young's modulus of surface protective plate can be measured tensile strength according to JIS-K-7127, obtains according to the slope at initial stage of stress-strain curve.
The bend processing method of metal sheet of the present invention uses surface protective plate of the present invention.The bend processing method of metal sheet of the present invention is attached to surface protective plate of the present invention on the metal sheet as processing object in the pre-treatment of the bending machining operation of metal sheet.Like this, the operability in the bending machining operation thereafter will improve, and can protect the surface of metal sheet well.Surface protective plate of the present invention both can utilize manual operation to carry out to the attaching on the metal sheet, also can utilize machinery to paste and carry out, yet consider from productive viewpoint, and preferred mechanical is pasted.
Embodiment
Below, utilize the present invention of embodiment to be specifically described, yet the present invention is not subjected to any restriction of these embodiment.
[embodiment 1]
With respect to being 0.919g/cm by density
3Low Density Polyethylene (Sumitomo Mitsui polyolefins company system, Sumikasen F-218) 80 weight % and density be 0.882g/cm
3The resin compound that constitutes of ethylene-octene copolymer (Exxon Mobil corporate system, EXACT8201) 20 weight %, mixed carbon black (Mitsubishi Chemical's system, carbon black " #45 ") 3.8 weight %, native silicon dioxide (median size 5.0 μ m) 0.2 weight %, utilize blow-moulding machine with 170 ℃ die head temperature film forming, produce the supporting substrate of thick 100 μ m.On the supporting substrate of gained, be coated with styrene ethylene butylene styrene polymkeric substance (Asahi Chemical Industry's corporate system, Tuftec H1221), make that dried thickness is 15 μ m, be dried, produce surface protective plate.
[embodiment 2]
With respect to being 0.918g/cm by density
3Low Density Polyethylene (Japanese Polychem corporate system, ノ バ テ Star Network LD LC-500) 70 weight % and density be 0.902g/cm
3The resin compound that constitutes of ethylene-octene copolymer (Exxon Mobil corporate system, EXACT0201) 30 weight %, mixed carbon black (Mitsubishi Chemical's system, carbon black " #45 ") 3.8 weight %, weather stablizer (Ciba Specialty Chemicals corporate system, Chimassorb 944) 0.1 weight %, utilize blow-moulding machine with 200 ℃ die head temperature film forming, produce the supporting substrate of thick 80 μ m.On the supporting substrate of gained coating be dissolved in propylene series copolymer (sumitomo chemical company system, Tafthren X2135) in the toluene solution and filter and solution, make that dried thickness is 5 μ m, be dried, produce surface protective plate.
[embodiment 3]
With respect to being 0.919g/cm by density
3Low Density Polyethylene (Sumitomo Mitsui polyolefins company system, Sumikasen F-218) 75 weight % and density be 0.882g/cm
3Ethylene-octene copolymer (Exxon Mobil corporate system; EXACT8201) resin compound of 25 weight % formation; mixed carbon black (Mitsubishi Chemical's system; carbon black " #45 ") 3.8 weight %; lubricant (Nof Corp.'s system; Alflow H50S) 0.6 weight %; with the substrate layer composition of gained with by styrene ethylene butylene unregulated polymer (JSR corporate system; Dynaron 2324P) the bonding coat components utilising T die head forming mill of Gou Chenging by the coextrusion film forming, is produced the substrate layer by 110 μ m with 200 ℃ die head temperature; the surface protective plate that the bonding coat of 8 μ m constitutes.
[comparative example 1]
Except in embodiment 1, resin compound only is set as to beyond the Low Density Polyethylene, utilize the method identical with embodiment 1, produce surface protective plate.
[comparative example 2]
Except in embodiment 2, resin compound only is set as to beyond the ethylene-octene copolymer, utilize the method identical with embodiment 2, produce surface protective plate.
[comparative example 3]
Except in embodiment 1, as resin compound, used by density to be 0.919g/cm
3Low Density Polyethylene (Sumitomo Mitsui polyolefins company system, Sumikasen F-218) 40 weight % and density be 0.882g/cm
3The resin compound that constitutes of ethylene-octene copolymer (Exxon Mobil corporate system, EXACT8201) 60 weight % beyond, utilize the method identical with embodiment 1, produce surface protective plate.
[comparative example 4]
Except in embodiment 1, as resin compound, used density to be 0.880g/cm
3Polypropylene (Sun Allomer corporate system, KS-353P) in addition, utilize the method identical with embodiment 1, produce surface protective plate.Wherein, the shaping of base material is to use T die head forming mill to carry out with 240 ℃ die head temperature.
[comparative example 5]
Except in embodiment 1, as resin compound, used by density to be 0.919g/cm
3Low Density Polyethylene (Sumitomo Mitsui polyolefins company system, Sumikasen F-218) 60 weight % and density be 0.900g/cm
3The resin compound that constitutes of polypropylene (bright dipping petroleum chemistry corporate system, bright dipping PPF-704NP) 40 weight % beyond, utilize the method identical with embodiment 1, produce surface protective plate.Wherein, the shaping of base material is to use T die head forming mill to carry out with 220 ℃ die head temperature.
[comparative example 6]
Except in embodiment 1, as resin compound, used by density to be 0.919g/cm
3Low Density Polyethylene (Sumitomo Mitsui polyolefins company system, Sumikasen F-218) 50 weight % and density be 0.913g/cm
3The resin compound that constitutes of ethene-hexene copolymer (Sumitomo Mitsui polyolefins company system, EVOLUE-SP2020) 50 weight % beyond, utilize the method identical with embodiment 1, produce surface protective plate.
[evaluation test]
(tension test (Young's modulus, maximum stress))
Tension test is carried out according to JIS-K-7127.The mensuration sample uses the surface protective plate that cuts off with the shape of the test film type of putting down in writing among the JIS-K-7127 2, carries out with the chuck interval of 50mm, the test film width of 10mm, the trial speed of 300mm/min.In addition, used trier has used internally-oriented tensile testing machine (Shimadzu Seisakusho Ltd.'s corporate system, Autograph) in the mensuration.Obtain Young's modulus and maximum stress by stress-strain curve, calculate Young's modulus according to the slope at initial stage, calculate maximum stress according to the maximum value of stress.The results are shown in Table 1.
(tear test)
Tear test is carried out according to JIS-K-7128-2.Mensuration is that vertical (MD) of surface protective plate and horizontal (TD) are measured with 1 tablet of unit respectively; measure (16 plate sheet) respectively 16 times for the thin slice of MD direction and the thin slice of TD direction, the summation of each numerical value is defined as love Er Mendaofu tear strength of the present invention.In addition, according to vertically (MD) and the laterally intensity of (TD), calculate tear strength than (MD/TD).The results are shown in Table 1.
(metal bending adds the surface protective plate breaking property in man-hour)
Surface protective plate is attached on the stainless steel plate (304HL) of thick 2.0mm with the crimping of 2kg roller, so that surface protective plate is in the mode of an opposite side of drift arrange after, carry out metal V bending machining test (vee-block method) (JIS-Z-2248).At this moment; in die head V angle: 88 degree, die head V width: 16mm, die head R:2.0, drift angle: carry out under the condition of 88 degree, drift R:0.6; the situation that will produce surface protective plate fracture after bending machining is made as *, the situation of generation not be made as zero.In addition, similarly also confirmed the state that floats of V curved part, the situation that generation is floated is made as *, will be made as zero less than situation about producing.The results are shown in Table 1.
(operability)
Hang the surface protective plate of wide 1000mm, pull out and confirm behind the 1000mm at vertically (MD), the horizontal cutter cutting on (TD).Situation about can cut is made as zero no problemly, and the situation of good situation is made as with producing not *.The results are shown in Table 1.
(glue trace)
Stripper surface screening glass the stainless steel plate after carrying out above-mentioned metal V bending machining test utilizes visual glue trace to the stainless steel plate surface to observe.To there be the situation of glue trace to be made as zero, the situation that produces the glue trace is made as *.The results are shown in Table 1.
(maximum tan δ temperature)
The maximum temperature of the tan δ value of the Measurement of Dynamic Viscoelasticity in the bonding coat of surface protective plate in-65～80 ℃ the mensuration temperature range of used hydrogenated styrene based elastomers is when the ARES that uses Rheometric Scientific corporate system gives the shear of frequency of 1Hz, give-65～85 ℃ temperature variation (5 ℃ of heat-up rates/min) measure.The bonding coat that the mensuration sample is made about thick 5mm is measured.Making of bonding coat is to utilize the casting method of organic solvent or pressure sintering to carry out.Consequently, for the maximum temperature of the tan δ value of styrene ethylene butylene styrene polymkeric substance used in embodiment 1 and 3 (Asahi Chemical Industry's corporate system, Tuftec H1221) and styrene ethylene butylene unregulated polymer (JSR corporate system, Dynaron 2324P), H1221 is-32 ℃, and 2324P is-35 ℃.The results are shown in Table 1.
[table 1]
According to table 1 as can be known, the surface protective plate of embodiment is when giving anti-the cutting property of thin slice, and is also very outstanding aspect anti-floating property, operability.In addition, the metal sheet surface of the surface protective plate of embodiment after metal bending processing do not produce the glue trace.
Utilizability on the industry
Surface protective plate of the present invention can be used for following purposes etc.; namely; for example to metal sheet, application member such as metal sheet, aluminum alloy frame, resin board, decorative steel plate, vinylchlorid laminate steel, sheet glass carry, when processing or maintenance etc., be attached to these component surface and protected.
Claims (6)
1. surface protective plate, it is the surface protective plate that is formed with bonding coat in the one side that contains the substrate layer of the resin compound that is made of Low Density Polyethylene and ethene-alpha-olefin copolymer as principal constituent,
The theoretical base material density of being calculated by the density separately of described Low Density Polyethylene and described ethene-alpha-olefin copolymer and mixture ratio is 0.905～0.915g/cm
3,
The love Er Mendaofu tear strength of vertical (MD) of described surface protective plate and horizontal (TD) is 0.1～0.9N, and tear strength is 0.2～2.0 than (MD/TD), and maximum stress (MD and TD) is 20～30MPa.
2. surface protective plate according to claim 1, wherein,
Described bonding coat contains at least a kind that is selected from hydrogenated styrene based elastomers and the propylene series copolymer, described hydrogenated styrene based elastomers is that the maximum temperature of the tan δ value of (1) Measurement of Dynamic Viscoelasticity in-65～80 ℃ mensuration temperature range be-40～-25 ℃ hydrogenated styrene based elastomers, and to be (2) comprise propylene, be selected from least a kind of alpha-olefin in the alpha-olefin of carbon number 4～12 and the propylene series copolymer of ethene as copolymer composition described propylene series copolymer.
3. surface protective plate according to claim 1, wherein,
Described substrate layer contains carbon black.
4. surface protective plate according to claim 1, wherein,
Described ethene-alpha-olefin copolymer is ethylene-octene copolymer.
5. surface protective plate according to claim 1, wherein,
Utilize coextrusion to form described substrate layer and described bonding coat.
6. the bend processing method of a metal sheet, its right to use requires each described surface protective plate in 1 to 5.
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| CN2012100361250A CN103254810A (en) | 2012-02-15 | 2012-02-15 | Surface protection sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100361250A CN103254810A (en) | 2012-02-15 | 2012-02-15 | Surface protection sheet |
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| CN103254810A true CN103254810A (en) | 2013-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107629710A (en) * | 2016-07-05 | 2018-01-26 | 日东电工株式会社 | Surface protection film |
| CN107922792A (en) * | 2015-08-21 | 2018-04-17 | 东丽薄膜先端加工股份有限公司 | Surface protection film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597302A (en) * | 2003-09-17 | 2005-03-23 | 日东电工株式会社 | Expansion extrusion molding, extrusion molding apparatus therefor, and process for producing pressure-sensitive adhesive sheet |
| DE102008021841A1 (en) * | 2008-04-30 | 2009-11-05 | Tesa Se | Polyolefin film and use thereof |
| JP2010121018A (en) * | 2008-11-19 | 2010-06-03 | Dainippon Printing Co Ltd | Protection film for coated plate |
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- 2012-02-15 CN CN2012100361250A patent/CN103254810A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597302A (en) * | 2003-09-17 | 2005-03-23 | 日东电工株式会社 | Expansion extrusion molding, extrusion molding apparatus therefor, and process for producing pressure-sensitive adhesive sheet |
| DE102008021841A1 (en) * | 2008-04-30 | 2009-11-05 | Tesa Se | Polyolefin film and use thereof |
| JP2010121018A (en) * | 2008-11-19 | 2010-06-03 | Dainippon Printing Co Ltd | Protection film for coated plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107922792A (en) * | 2015-08-21 | 2018-04-17 | 东丽薄膜先端加工股份有限公司 | Surface protection film |
| CN107629710A (en) * | 2016-07-05 | 2018-01-26 | 日东电工株式会社 | Surface protection film |
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Application publication date: 20130821 |