CN103254806A - Surface protection sheet and making method thereof - Google Patents
Surface protection sheet and making method thereof Download PDFInfo
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- CN103254806A CN103254806A CN2012100361212A CN201210036121A CN103254806A CN 103254806 A CN103254806 A CN 103254806A CN 2012100361212 A CN2012100361212 A CN 2012100361212A CN 201210036121 A CN201210036121 A CN 201210036121A CN 103254806 A CN103254806 A CN 103254806A
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Abstract
The invention provides a surface protection sheet and a making method thereof. The surface protection sheet is obtained through a step of processing a substrate layer and an adhesive layer through using a co-extrusion method to form a film, and a step of carrying out film removing treatment of the substrate layer. The surface protection sheet has an excellent weatherability, has a good uncoiling property from coiling bodies and the like, and has no problems comprising transfer printing of a film removing component to the adhesive layer or pollution. The surface protection sheet is obtained through co-extruding the substrate layer containing a polyolefin series resin and the adhesive layer containing a thermoplastic elastomer to form the film, the substrate layer includes at least one layer selected form a white series layer and a black series layer, and a film removing agent is applied to the surface opposite to the substrate layer attached with the adhesive layer to form the film removing layer.
Description
Technical field
The present invention relates to surface protective plate and manufacture method thereof.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.
Background technology
, considered from the aspect of productivity or cost that surface protective plate utilized coetrusion that substrate layer and bonding coat film forming are made in the past.In addition, because surface protective plate is used as uses such as coiling body, therefore in order to carry out uncoiling etc. easily, for the substrate layer back side (the opposite one side of bonding coat), the release property that requirement can gently be peeled off.As common surface protective plate, the known surface protective plate that polyolefin-based resins such as using polyethylene is arranged in substrate layer, in bonding coat, use vinyl-vinyl acetate copolymer for example.In the surface protective plate of this type, handle even the demoulding is not carried out at the back side of substrate layer, also can uncoiling.
In recent years, in bonding coat, used the surface protective plate of the strong adhesion type of ethene based elastomers to obtain commercialization.The surface protective plate of this type needs the demoulding to handle in order to carry out uncoiling etc. easily at the substrate layer back side.But from the producing apparatus aspect, it is unpractical carrying out demoulding processing at the substrate layer back side of the surface protective plate that utilizes coetrusion manufacturing coating releasing agent.
Demoulding facture as the substrate layer back side of the surface protective plate that utilizes coetrusion to make proposed to utilize roller, cloth etc. the substrate layer back side to be carried out the method (for example with reference to patent documentation 1) of friction treatment.But, in this kind demoulding treatment process, be difficult to carry out friction treatment equably, can't obtain good release property, have problems such as can't reducing uncoiling power fully.In addition, also has the situation that in stripping result, produces fluctuation because of the mated condition of substrate layer.Particularly, the fluctuation of friction treatment effect has the more high then more tangible trend of production rate.Can think because because production rate accelerates, the speed of relative movement of abrasive treatment tube also must accelerate, and can't stably carry out friction treatment thus this.In addition, forming in the middle of the ethylene series resin that material uses only effectively to polyvinyl resin as substrate layer by the demoulding facture of friction treatment, do not having effect for acrylic resin on substantially.Thus, in the surface protective plate that has used polypropylene-based base material, can't obtain good release property, cause the uncoiling condition of poor thereby have.
In addition, proposed in substrate layer or bonding coat, to have added the demoulding facture (for example with reference to patent documentation 2) of fatty acid amide.But in this kind demoulding facture, fatty acid amide causes transfer printing on the bonding coat surface, and it is again to by the adherend transfer printing then, causes pollution, reduces problem such as bounding force thereby have.And, in this kind demoulding facture, in that few chain alkyl based polymer similarly adds under the situation in the substrate layer as releasing agent substituted fatty acid acid amides and with contaminative, though can obtain good release property, aspect contaminative, can not improve.
In addition, surface protective plate does not in the past possess enough weathering resistances, and under the situation of preserving under outdoor application or the high temperature, its bounding force is passed in time and increased, thereby has the problem of the separability variation when being peeled off by adherend.
The prior art document
Patent documentation 1 Japanese kokai publication hei 2-252777 communique
Patent documentation 2 Japanese kokai publication sho 57-139163 communiques
Summary of the invention
The objective of the invention is to; a kind of surface protective plate and manufacture method thereof are provided; this surface protective plate is to utilize coetrusion to carry out the surface protective plate that the demoulding is handled with substrate layer and bonding coat film forming and to substrate layer; it demonstrates excellent weathering resistance; uncoiling from coiling body etc. is good; and do not have the transfer printing of demoulding composition in the bonding coat, there is not the problem of contaminative.
Surface protective plate of the present invention is the surface protective plate that the bonding coat that contains the substrate layer of polyolefin-based resins and contain thermoplastic elastomer is utilized the coextrusion film forming,
This substrate layer comprises at least 1 layer that is selected from white color system layer and the black system layer,
Setting up the opposite face of face with bonding coat and utilize releasing agent to be formed with release layer at this substrate layer.
In preferred embodiment, the thickness of above-mentioned release layer is 1～1000nm.
The manufacture method of surface protective plate is provided according to another aspect of the present invention.The manufacture method of surface protective plate of the present invention is after the substrate layer that will contain polyolefin-based resins and the bonding coat that contains thermoplastic elastomer utilize the coextrusion film forming; continuously this substrate layer set up the opposite face of face with bonding coat, utilize releasing agent to form release layer.
According to the present invention; a kind of surface protective plate can be provided; it utilizes coetrusion with substrate layer and bonding coat film forming; this substrate layer comprises at least 1 layer that is selected from white color system layer and the black system layer, and substrate layer has been carried out demoulding processing, and this surface protective plate demonstrates excellent weathering resistance; uncoiling from coiling body etc. is good; and the not transfer printing of the demoulding composition in the bonding coat, do not have the problem of contaminative, and its manufacture method can be provided.
Description of drawings
Fig. 1 is the constructed profile of surface protective plate preferred embodiment of the present invention.
Fig. 2 is the synoptic diagram of the manufacture method of surface protective plate preferred embodiment of the present invention.Nomenclature
1 substrate layer, 2 bonding coats, 3 release layers
Embodiment
Fig. 1 is the sectional view of surface protective plate; the substrate layer 1 that will contain polyolefin-based resins utilizes the coetrusion film forming with the bonding coat 2 that contains thermoplastic elastomer; substrate layer 1 comprises at least 1 layer that is selected from white color system layer and the black system layer; the face opposite with the face of setting up of bonding coat 2 at substrate layer 1 utilizes releasing agent to be formed with release layer 3.
Polyolefin-based resins in the substrate layer contain proportional being preferably more than the 50 weight %, more preferably more than the 60 weight %, more preferably more than the 70 weight %, be preferably especially more than the 80 weight %, most preferably be more than the 90 weight %.
Polyolefin-based resins as forming substrate layer can adopt appropriate arbitrarily polyolefin-based resins.As this kind polyolefin-based resins, the block that for example can enumerate polypropylene, is constituted by propylene composition and ethene composition be polypropylene or random be acrylic polymers such as polypropylene; Ethylene-based polymers such as Low Density Polyethylene, high density polyethylene(HDPE), linear low density polyethylene; Multipolymer of ethene compositions such as ethylene-alpha-olefin copolymer, vinyl-vinyl acetate copolymer, ethylene-methyl methacrylate methyl terpolymer and other monomers etc.These polyolefin-based resins can only be a kind both, also can be more than 2 kinds.
Substrate layer contains polyolefin-based resins as principal constituent, yet for preventing purposes such as deterioration, also can contain appropriate arbitrarily additive.As this kind additive, for example can enumerate oxidation inhibitor, UV light absorber, hindered amine is photostabilizer, anti-electrostatic agent interfering, weighting agent (for example calcium oxide, magnesium oxide, silicon-dioxide, zinc oxide, titanium oxide etc.), pigment, preventing materials accumulation agent (order ヤ ニ prevents drug), lubricant, antis etc. such as photostabilizer.
The thickness of substrate layer can adopt appropriate arbitrarily thickness.As the thickness of this kind substrate layer, be preferably 20～300 μ m, more preferably 30～250 μ m, more preferably 40～200 μ m.Substrate layer both can be individual layer, also can be two-layer above multilayer.
Substrate layer comprises at least 1 layer that is selected from white color system layer and the black system layer.By substrate layer being comprised be selected from least 1 layer in white color system layer and the black system layer, can form the very excellent surface protective plate of weathering resistance.
The white color system layer is the layer that demonstrates the tone of white color system, and for example the whiteness by the JIS-L-1015 regulation is preferably more than 60%, more preferably more than 70%, more preferably more than 80%, is preferably more than 85% especially.The white color system layer preferably comprises white pigment.As white pigment, can adopt appropriate arbitrarily white pigment.As this kind white pigment, for example can enumerate titanium oxide.Contain at the white color system layer under the situation of white pigment, it contains proportional resinous principle with respect to formation white color system layer and is preferably 0.1～50 weight %, more preferably 1～30 weight %, more preferably 2～20 weight %.
The resinous principle that forms the white color system layer is preferably polyolefin-based resins, more preferably ethylene-based polymer, more preferably density 0.88～0.93g/cm
3Ethylene-based polymer.As the resinous principle that forms the white color system layer, specifically, can preferably enumerate Low Density Polyethylene (LDPE), linear low density polyethylene (LLDPE).Polyolefin-based resins in the white color system layer contain proportional being preferably more than the 60 weight %, more preferably more than the 70 weight %, more preferably more than the 80 weight %, be preferably especially more than the 85 weight %, most preferably be more than the 90 weight %.This kind polyolefin-based resins both can only use a kind, also can use more than 2 kinds.
The thickness of white color system layer can adopt 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.
Black system layer is the layer that demonstrates the tone of black system.Black system 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.Layer contains under the situation of black pigment in black system, and it contains proportional resinous principle with respect to formation black system layer and is preferably 0.01～10 weight %, more preferably 0.1～5 weight %, more preferably 0.5～3 weight %.
The resinous principle that forms black system layer is preferably polyolefin-based resins, more preferably ethylene-based polymer, more preferably density 0.88～0.93g/cm
3Ethylene-based polymer.As the resinous principle that forms black system layer, specifically, can preferably enumerate Low Density Polyethylene (LDPE), linear low density polyethylene (LLDPE).Polyolefin-based resins in the black system layer contain proportional being preferably more than the 60 weight %, more preferably more than the 70 weight %, more preferably more than the 80 weight %, be preferably especially more than the 85 weight %, most preferably be more than the 90 weight %.This kind polyolefin-based resins both can only use a kind, also can use more than 2 kinds.
The thickness of black system layer can adopt 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 as surface protective plate of the present invention; be not particularly limited, can adopt any one formation of " release layer/white color system layer/bonding coat ", " release layer/black system layer/bonding coat ", " release layer/white color system layer/black system layer/bonding coat ", " release layer/black system layer/white color system layer/bonding coat ".In addition, as substrate layer, also can be made as the layer more than 3 layers that forms black system layer and white color system layer layer in addition and constitute.Specifically, also can be made as formations such as " release layer/transparent resin layers/white color system layer/black system layer/bonding coat ".In addition, the thickness of white color system layer and black system layer both can be identical, also can be different thickness (the white color system layer than the black system thin thickness of layer constitute, the white color system layer is that the thickness of bed thickness constitutes than black).
Also can be as required, be the surface treatment of purpose to the linging processing of the face of the setting up embodiment of the release layer of substrate layer such as Corona discharge Treatment, flame treating, Cement Composite Treated by Plasma, sputter etching processing, silane coupling agent etc. etc. with the closing force that improves release layer and substrate layer etc.
Thermoplastic elastomer in the bonding coat contain proportional being preferably more than the 50 weight %, more preferably more than the 60 weight %, more preferably more than the 70 weight %, be preferably especially more than the 80 weight %, most preferably be more than the 90 weight %.
Thermoplastic elastomer as forming bonding coat can adopt appropriate arbitrarily thermoplastic elastomer.As this kind thermoplastic elastomer, for example can enumerate styrene series elastomer, ethylene series elastomerics, polyurethane series elastomerics, ester based elastomers, their hydride etc.
As styrene series elastomer, specifically, for example can enumerate styrene-butadiene-copolymer (SB), styrene isoprene multipolymer (SI), styrene ethylene-butylene copolymer (SEB), styrene ethylene-propylene copolymer A-B type diblock polymers such as (SEP); The multi-block polymer that styrene butadiene styrene multipolymer (SBS), styrene isoprene styrol copolymer (SIS), the cinnamic multipolymer of styrene ethylene-butylene copolymer (SEBS), styrene ethylene-propylene copolymer vinylbenzene A-B-A type three blocks such as (SEPS) or A-B-A-B type four blocks are above; Styrene butadiene ribber multipolymer polystyrene random copolymerss such as (SBR); The vinylbenzene alkene crystal system block polymer of styrene ethylene-butylene copolymer alkene crystal A-B-C such as (SEBC) type etc.
As the ethylene series elastomerics, specifically, for example can enumerate the ethylene series binder resin such as alkene crystal system block polymer, ethene-alpha-olefin copolymer, ethylene-propylene-alpha-olefin copolymer, propylene-alpha-olefin copolymers, vinyl-vinyl acetate copolymer etc. of alkene crystal ethylene-butene copolymer alkene crystal C-B-C such as (CEBC) type.
Bonding coat can contain appropriate arbitrarily additive.As this kind additive, for example can enumerate tenderizer, tackifier, ethylene series resin, silicone-based polymkeric substance, aqueous acrylic copolymer, phosphoric acid ester based compound, protective agent, hindered amine is photostabilizer, UV light absorber, surface lubricant, leveling agent, softening agent, low-molecular(weight)polymer, oxidation inhibitor, anticorrosive agent, stopper, silane coupling agent, inorganic and organic weighting agent (for example calcium oxide, magnesium oxide, silicon-dioxide, zinc oxide, titanium oxide etc.), metal powder, tinting material, pigment, heat-resisting stabilizing agent etc.
The cooperation of tenderizer is effective for improving bounding force as a rule.As tenderizer, for example can enumerate low-molecular-weight polyisobutene, polybutene, polyisoprene, polyhutadiene, hydrogenated polyisoprene, hydrogenated butadiene polymer and be that softening agent or phosphoric acid ester are softening agent, aqueous aliphatics through-stone oleo-resinous etc. at their end or derivative, ethylene-propylene rubber(EPR), Viscotrol C, Semen Lini oil, soybean oil, treated oil, naphthenic oil, phthalic ester with reactive groups such as OH base, COOH base or epoxy group(ing) of two ends.
As said derivative, more particularly, can enumerate for example hydrogenated butadiene polymer glycol, hydrogenated butadiene polymer single methanol, hydrogenated polyisoprene glycol, hydrogenated polyisoprene single methanol.In the middle of them, from suppressing considered the hydride of diene polymers such as preferred especially hydrogenated butadiene polymer or hydrogenated polyisoprene or ethylene series tenderizer etc. by the purpose of the fusible raising of adherend.Specifically, can buy the trade(brand)name " Kuraprene LIR-200 " etc. of (strain) Kuraray system.
Tenderizer can only be a kind both, also can be more than 2 kinds.
The number-average molecular weight of tenderizer is preferably 5000～100,000, and more preferably 10,000～50,000.If the number-average molecular weight of tenderizer is too small, then might cause from bonding coat on the other hand, if molecular weight is excessive, then can lacking the raising effect of bounding force to by the substance transfer of adherend or heavy peeling off etc.
The use level of tenderizer is preferably below the 100 weight % with respect to the matrix polymer of bonding coat, more preferably below the 60 weight %, more preferably below the 40 weight %, is preferably especially below the 20 weight %, most preferably is below the 10 weight %.
The cooperation of tackifier is effective for improving bounding force as a rule.As tackifier, for example can enumerate petroleum line resin, coumarone indenes such as fatty family or fragrant family, aliphatic/aromatic copolymer system or ester ring type system and be resin, terpenic series resin, terpenes phenolic aldehyde and be resin, alkyl phenolic and be resin, rosin series resin, polymerized rosin is resin, diformazan benzene series resin and their hydride etc.Tackifier can only be a kind both, also can be more than 2 kinds.
For the use level of tackifier, the generation of the glue trace problem that causes from the reduction of avoiding by cohesive force improves aspect such as bounding force simultaneously and considers, matrix polymer with respect to bonding coat, be preferably below the 80 weight %, more preferably below the 60 weight %, more preferably below the 50 weight %.
The thickness of bonding coat is preferably 1～50 μ m, more preferably 2～40 μ m, more preferably 5～20 μ m.Be in the above-mentioned scope by the thickness limits with bonding coat, utilizing co-extrusion to come out to make under the situation of surface protective plate of the present invention, be easy to carry out the control that layer constitutes, the surface protective plate that can obtain to have enough physical strengths in addition.
Also can be as required to the surperficial embodiment of bonding coat 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.
For bonding coat, also can be as required, before being used for practical application during, attach barrier film etc. temporarily and protected.
Releasing agent as forming release layer can adopt appropriate arbitrarily releasing agent.As this kind releasing agent, for example can enumerate the material that comprises silicone-based polymkeric substance or chain alkyl based polymer.Releasing agent can be no-solvent type, be dissolved in solvent-borne type in the organic solvent, in water emulsification any one of oil-in-water type, yet the releasing agent of solvent-borne type, oil-in-water type can stably be attached to release layer in the substrate layer.In addition, can also adopt the releasing agent of ultraviolet hardening.As releasing agent, more particularly, Peeloil (a side society grease corporate system), the Silicone of SHIN-ETSU HANTOTAI (chemical industrial company of SHIN-ETSU HANTOTAI system) etc. can have been bought.
To reduce effect big owing to pollute under the situation that filming forms, so the thickness of releasing agent is preferably 1～1000nm, more preferably 5～500nm, more preferably 10～100nm.
Surface protective plate of the present invention can be by after the substrate layer that will contain polyolefin-based resins and the bonding coat that contains thermoplastic elastomer utilize the coetrusion film forming, continuously setting up the opposite face of face with bonding coat and utilize releasing agent to form release layer to make at this substrate layer.
In the manufacture method of surface protective plate of the present invention, the substrate layer that will contain polyolefin-based resins utilizes the operation (film formation process) of coetrusion film forming with the bonding coat that contains thermoplastic elastomer and utilizes the flow process speed of the operation (demoulding treatment process) of releasing agent formation release layer to be preferably 10～100m/ minute.
In the manufacture method of surface protective plate of the present invention; specifically; for example as shown in Figure 2; the formation material that adds substrate layer 1 respectively in the forcing machine 11; the formation material that adds bonding coat in the forcing machine 12; extrude after mixing, use coextrusion machine 16 to utilize coetrusion with substrate layer 1 and bonding coat 2 film forming them again.As coetrusion, may be in accordance with blow moulding, the T die head method generally used in the thin film fabrication etc. and wait to carry out.And substrate layer 1 and bonding coat 2 are by bilayer or multilayer ground coextrusion.Can implement aforesaid surface treatment to substrate layer 1 and bonding coat 2 as required.
In the demoulding treatment process 13 that on same production line, arranges continuously following film formation process, at the face opposite with the face of setting up of bonding coat 2 of substrate layer 1, utilize releasing agent 3 ' to form release layer 3.As shown in Figure 2, in the demoulding treatment process 13, for example utilize the coating method by roller coating machines such as gravure roll to be coated with releasing agent 3 '.As demoulding treatment process 13, in addition, can also adopt by the spray pattern etc. of spraying etc. appropriate coating method arbitrarily.After demoulding treatment process 13, according to the kind of releasing agent, after dry (curing) operations 14 such as enforcement heating, uviolizing, EB irradiation, utilize wind up roll 15 to reel, obtain surface protective plate as coiling body.
[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.
(uncoiling power)
The reel of the surface protective plate of winding is vertically carried out uncoiling with internally-oriented tensile testing machine with the angle of 300mm/ minute draw speed, the thin slice that makes uncoiling and reel face, determine uncoiling power (N/20mm).
(contaminative)
Surface protective plate after preserving for 1 week under the cyclic group of 50 ℃/95%RH, is attached on the stainless steel plate (304BA plate), after preserving under 50 ℃/95% the cyclic group, under room temperature (23 ℃), peels off again.Have pollution-free on the stainless steel plate after confirming to peel off.
(mensuration of weathering resistance)
The surface protective plate that obtains in embodiment and the comparative example is cut into the rectangle of wide 20mm and produces the evaluation sample.The roller by making 2kg 1 time and after being crimped on this sample on the SUS430BA plate back and forth, dropped in the sunlight carbon arc weather resistance test machine (Suga trier Co., Ltd. product) 1000 hours, then, peel off length to 100mm with 0.3m/ minute the end of draw speed along 180 ° of directions from sample.
According to the above-mentioned result of following benchmark evaluation.
Zero: sample is not broken, can peel off very well.
*: because the deterioration of base material makes sample broken on the way, perhaps adhesive residue is in by adherend and with its pollution.
[embodiment 1]
(film formation process)
Will be with respect to Low Density Polyethylene (Tosoh corporate system, Petrocene180) added the white pigment (corporate system of refining big day of 20 weight %, HCM2035W) base material white color system layer forms material, with respect to Low Density Polyethylene (Tosoh corporate system, Petrocene180) added carbon black (Mitsubishi Chemical's system of 1 weight %, carbon black " #45 ") base material black system layer forms material, with with respect to styrene ethylene butylene styrene polymkeric substance (Asahi Chemical Industry's corporate system, Tuftec H1042) added hydrogenation petroleum line resin (the waste river chemical company system of 23 weight %, Alcon P-100) bonding coat forms material use T die head method, with 230 ℃ die head temperature, form white color system layer 50 μ m according to the order coextrusion of white color system layer/black system layer/bonding coat, the layer 50 μ m of black system, with bonding coat 10 μ m.The flow process speed of film formation process was carried out with 45m/ minute.
(demoulding treatment process)
Follow above-mentioned film formation process, set up the opposite face of face at substrate layer with bonding coat continuously, as chain alkyl based polymer releasing agent, utilize gravure roll so that the thickness of release layer (dry back) is the mode of 50nm, the Peeloil 1010S toluene solution of coating concentration 1 weight % (a side society grease corporate system), be dried, thereby form release layer.The flow process speed of stripping process was carried out with 45m/ minute.
Produce surface protective plate as described above.The results are shown in Table 1.
[embodiment 2]
Except in (demoulding treatment process) of embodiment 1; as releasing agent; use aqueous dispersion type releasing agent K-256 (Zhong jing grease corporate system); so that the thickness of release layer (dry back) is coated with for the mode of 100nm; be dried and form beyond the release layer, produce surface protective plate in the same manner with embodiment 1.The results are shown in Table 1.
[embodiment 3]
Except in (demoulding treatment process) of embodiment 1; as releasing agent; use ultraviolet hardening silicone-based releasing agent XS56-A2982 (Silicone of GE Toshiba corporate system); so that the thickness of release layer (dry back) is coated with for the mode of 100nm; irradiation ultraviolet radiation and forming beyond the release layer is produced surface protective plate in the same manner with embodiment 1.The results are shown in Table 1.
[embodiment 4]
Except in (film formation process) of embodiment 1, replace Low Density Polyethylene, and used polypropylene (bright dipping petroleum chemistry corporate system, IDEMITSU PP F-744NP) in addition, produce surface protective plate in the same manner with embodiment 1.The results are shown in Table 1.
[comparative example 1]
Except in (film formation process) of embodiment 1, form in the material at substrate layer, added the ethylenebisstearamide (Japan changes into corporate system) of 1 weight % again in addition, produce surface protective plate in the same manner with embodiment 1.The results are shown in Table 1.
[comparative example 2]
Except in (film formation process) of embodiment 1, form in the material at substrate layer, the Peeloil 1010S (a side society grease corporate system) that has added 3 weight % again in addition, produces surface protective plate in the same manner with embodiment 1.The results are shown in Table 1.
[comparative example 3]
Except in (demoulding treatment process) of embodiment 1, replace utilizing releasing agent to form release layer, and carried out beyond the friction treatment, produce surface protective plate in the same manner with embodiment 1.Friction treatment is based on Japanese kokai publication hei 9-324159 number embodiment, carries out with 100m/ minute speed of relative movement.The results are shown in Table 1.
[comparative example 4]
Except in (film formation process) of embodiment 1; replace Low Density Polyethylene; and used polypropylene (bright dipping petroleum chemistry corporate system, IDEMITSU PP F-744NP); and in (demoulding treatment process) of embodiment 1; replace utilizing releasing agent to form release layer; and carried out beyond the friction treatment, produce surface protective plate in the same manner with embodiment 1.Friction treatment is based on Japanese kokai publication hei 9-324159 number embodiment, carries out with 100m/ minute speed of relative movement.The results are shown in Table 1.
[comparative example 5]
Except in (film formation process) of embodiment 1, do not add beyond white pigment and the carbon black, produce surface protective plate in the same manner with embodiment 1.The results are shown in Table 1.
[table 1]
Observation table 1 can be distinguished; according to the present invention; following surface protective plate and manufacture method thereof can be provided, that is, utilize coetrusion to form substrate layer and bonding coat; this substrate layer comprises at least 1 layer that is selected from white color system layer and the black system layer; and substrate layer has been carried out demoulding processing, and this surface protective plate demonstrates excellent weathering resistance, and the uncoiling from coiling body etc. is good; and do not have the transfer printing of demoulding composition in the bonding coat, there is not the problem of contaminative.
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 (3)
1. surface protective plate, its bonding coat that will contain substrate layer of polyolefin-based resins and contain thermoplastic elastomer utilizes the coextrusion film forming,
This substrate layer comprises at least 1 layer that is selected from white color system layer and the black system layer,
Setting up the opposite face of face with bonding coat and utilize releasing agent to be formed with release layer at this substrate layer.
2. surface protective plate according to claim 1, wherein,
The thickness of described release layer is 1～1000nm.
3. the manufacture method of a surface protective plate, it is the manufacture method of claim 1 or 2 described surface protective plates, wherein,
After the substrate layer that will contain polyolefin-based resins and the bonding coat that contains thermoplastic elastomer utilize the coextrusion film forming, continuously this substrate layer set up the opposite face of face with bonding coat, utilize releasing agent to form release layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110628344A (en) * | 2019-09-16 | 2019-12-31 | Oppo广东移动通信有限公司 | Hot bending protective film and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628344A (en) * | 2019-09-16 | 2019-12-31 | Oppo广东移动通信有限公司 | Hot bending protective film and preparation method and application thereof |
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Application publication date: 20130821 |