CN105017988A - PET (polyethylene terephthalate) protecting film and preparation method thereof - Google Patents
PET (polyethylene terephthalate) protecting film and preparation method thereof Download PDFInfo
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- CN105017988A CN105017988A CN201510514526.6A CN201510514526A CN105017988A CN 105017988 A CN105017988 A CN 105017988A CN 201510514526 A CN201510514526 A CN 201510514526A CN 105017988 A CN105017988 A CN 105017988A
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- 229920000139 polyethylene terephthalate Polymers 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000005020 polyethylene terephthalate Substances 0.000 title abstract 7
- -1 polyethylene terephthalate Polymers 0.000 title abstract 2
- 229920002799 BoPET Polymers 0.000 claims abstract description 13
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 claims description 37
- 238000002844 melting Methods 0.000 claims description 19
- 230000008018 melting Effects 0.000 claims description 19
- 229920000642 polymer Polymers 0.000 claims description 8
- 150000001336 alkenes Chemical class 0.000 claims description 7
- 238000005984 hydrogenation reaction Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 7
- 229920005604 random copolymer Polymers 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007766 curtain coating Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 abstract description 13
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 239000011229 interlayer Substances 0.000 abstract description 2
- 229920006124 polyolefin elastomer Polymers 0.000 abstract 3
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 19
- 239000012528 membrane Substances 0.000 description 17
- 230000001681 protective effect Effects 0.000 description 17
- 239000011347 resin Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 238000005259 measurement Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 8
- 230000000704 physical effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229920002725 thermoplastic elastomer Polymers 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a PET (polyethylene terephthalate) protecting film and a preparation method thereof and belongs to the technical field of substrate surface protection. The PET protecting film comprises a PET base layer and a bonding layer, wherein the bonding layer is prepared from metallocene polyethylene and POE (polyolefin elastomer), the mass percentage of metallocene polyethylene is 50%-100%, and the mass percentage of POE is 0%-50%; the PET base layer adopts a PET film. The protecting film has large interlayer adhesive force, high anti-seismic property, good adhesiveness and stripping performance, low crystallization point and high cleanness, the adhesion strength changes slightly with the temperature and time, no bubble emerges or no edge warping is caused after long-time adhesion, the protecting film is recyclable, the preparation method is simple to operate, and the cost is lower.
Description
Technical field
The invention belongs to substrate surface resist technology field, specifically, relate to a kind of protective membrane, more particularly, relate to a kind of PET protection film and preparation method thereof.
Background technology
Along with the fast development of IT, electrical type industry and the exploitation of many emerging high-tech applications, increasing to the PET protection film demand of electronic product.But due to the surface of electronic product component very fragile and responsive, therefore to covering the cleanliness factor of protective membrane in the above, brilliant some level, viscosity height, resistance to temperature must have very strict requirement.Produce at a lot of electronic product or touch-screen, liquid crystal display etc., use link, for avoiding the damage that may cause in processing, handling process, PET protection film must be used to give thorough protection, and protective membrane itself will be avoided to bring the pollution of affixed object.Traditional PET protection film explained hereafter is gluing method.The resin of gluing PET protection film adhesive coating coating is generally low molecule; adhesion strength scope is large, is widely used, however this kind of protective membrane for the manufacture of time; must be with an organic solvent; manufacturing processed not environmentally, can produce peculiar smell, and have to pass through secondary baking processing could remove organic solvent; manufacturing cost is increased; and the film of traditional technology manufacture easily causes cull and dirty wound on affixed object surface micro-structure surface, cause product rejection, cause product fraction defective to improve.
Kind and the preparation method of the current PET protection film about improving study the very many of report; such as; Chinese Patent Application No. is 201110072347.3; Shen Qing Publication day is that the patent application document of on 07 27th, 2011 announces a kind of flat-panel monitor processing procedure PET protection film; it comprises the PET protection film base material of optical grade and the low pressure sensitive adhesive of polarity; wherein, the pressure sensitive adhesive that polarity is low coats the upper surface of the PET protection film base material of optical grade.Chinese Patent Application No. is 201410333084.0, and Shen Qing Publication day is the bilayer structure PET protection film that the patent application document on November 12nd, 2014 is announced, and it is made up of PET high transmittance film and PET release film, and PET high transmittance film and PET release film stick into one mutually; Described PET high transmittance film is made up of a BOPET high transparency film, adhesion promoting layer, glue-line, scribbles adhesion promoting layer, scribble glue-line below adhesion promoting layer below a BOPET high transparency film; Described PET release film is made up of silicon layer and the 2nd BOPET high transparency film, and scribble silicon layer above the 2nd BOPET high transparency film, silicon layer glues mutually with the glue-line of PET high transmittance film.The problem such as PET protection film disclosed in above-mentioned patent document exists separability difference, structure level number causes the low and manufacturing process of transmittance loaded down with trivial details more.
Summary of the invention
1. the problem that will solve
Separability difference is there is for existing PET protection film, easy generation cull, the problems such as harm environment, the invention provides a kind of PET protection film and preparation method thereof, extrusion composite technology production is carried out at dust-free workshop application individual layer film forcing machine, simultaneously the equipment such as applied thickness tester carries out on-line tracing detection to film thickness in process of production, make film have thickness even simultaneously, cleanliness factor is high, inclusion-free, the good characteristics such as smooth in appearance and low brilliant point, and by the PET protection film of above embodiment machine-shaping, it is 10 ~ 300gf/25mm that bonding coat pastes mirror steel plate clinging power at normal temperatures, steel plate back side clinging power increasing degree of fitting under 50 DEG C of 1h controls between 2-5 times, and in process protective membrane easily openable without cull.
2. technical scheme
In order to solve the problem, the technical solution adopted in the present invention is as follows:
A kind of PET protection film, comprise PET basic unit and bonding coat, described bonding coat is made up of metallocene PE and POE elastomerics, and wherein, the massfraction of metallocene PE is the elastomeric massfraction of 50 ~ 100%, POE is 0 ~ 50%; Described PET basic unit is PET film.
Preferably, the integral thickness of described PET protection film is the thickness of 30-196 μm, PET basic unit is 25 ~ 188 μm, and account for 60 ~ 90% of integral thickness, bondline thickness is 4 ~ 8 μm, accounts for 4 ~ 15% of integral thickness.
Preferably, the molecular weight of the metallocene PE described in bonding coat is 40000 ~ 70000, and molecular weight distributing index is between 1.5 ~ 2.5, and its density is 0.89 ~ 0.90g/cm
3, 190 DEG C, melting index under 2.16kg pressure condition is 3.5 ~ 6.5g/10min; Described POE elastomerics is the hydrogenation random copolymers of styrenic polymer block and alkene, POE elastomerics 230 DEG C, melting index is 3 ~ 10g/10min under 2.16kg pressure condition, molecular weight is 30000 ~ 80000, molecular weight distributing index is between 1.5 ~ 2.5, and its density is 0.83 ~ 0.90g/cm
3.
Preferably, the longitudinal direction of described PET basic unit and transverse tensile strength all>=220N/mm
2; Longitudinally>=80% equal with transverse breakage elongation; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage≤2.0%, horizontal percent thermal shrinkage≤0.5%; Mist degree≤3.0, the glossiness measured when 45° angle is 110%.
The preparation method of above-mentioned a kind of PET protection film, the steps include:
(1) melt extrude: by the raw materials melt coextrusion of bonding coat, the feedstream after melting is extended down to the die head position of forcing machine;
(2) mouth mould curtain coating: the raw material after melting is cast on doubling roller by the mouth mould of die head;
(3) cool, fit: the feedstream after per os mould curtain coating is extended down on doubling roller, together with laminating with PET basic unit, cooling forming simultaneously;
(4) deburring, rolling: cut the slitter edge of film, batch, obtain described PET protection film.
Preferably, opening for feed to the temperature of die head of forcing machine sets gradually in described step (1) is 150 DEG C, 170 DEG C, 190 DEG C, 210 DEG C, 210 DEG C, 210 DEG C.
Preferably, in described step (3), doubling roller temperature controls at 30 DEG C, and doubling roller speed control is at 50m/min.
Preferably, batching time control controlling rolling tension force in described step (4) is 50-150 n/m.
Wherein, the hydrogenation random copolymers of styrenic polymer block and alkene is obtained by reacting by vinylbenzene and divinyl, and the elastomeric molecular weight of the POE obtained under this condition is 3 ~ 80,000.The adhesion-layer materials that the present invention plants is high molecular polymer, replacing existing coating method production PET protection film, making PET protection film have high transmission rate, high-modulus with extruding laminating method, can resistance to 150 DEG C of high temperature, indeformable, the advantages such as low residue.And environmentally safe when producing, can in mobile phone, the widespread use of computer industry.Contriver, when selecting suitable polymkeric substance, finds that existing material can not be fitted closely with PET basic unit, causes bonding coat and PET basic unit to depart from.For head it off; inventors performed a large amount of experiments and theoretical analysis; after the rare material of second testing more than tens of kinds and elastomerics; unexpected discovery; (massfraction of metallocene PE is 50 ~ 100% under specified proportion condition for metallocene polyethylene and POE elastomerics; the elastomeric massfraction of POE is 0 ~ 50%) bonding coat that forms and PET basic unit can fit tightly; the PET protection film prepared is made to have high transmission rate, high-modulus; can resistance to 150 DEG C of high temperature; indeformable, the advantages such as low residue.
3. beneficial effect
Compared to prior art, beneficial effect of the present invention is:
(1) bonding coat of the present invention is made up of metallocene PE, POE elastomerics, adhesive performance is good, the melting index of metallocene PE at 190 DEG C, under 2.16kg pressure condition (MFR) is 3.5 ~ 6.5g/10min, preferably MFR is 4.5 ~ g/10min, can not produce uneven thickness or striped unequal shortcoming when mixing with POE elastomer components and melt extrude;
(2) density of metallocene PE that the present invention selects is 0.89 ~ 0.90g/cm
3, the metallocene PE in this density range is easy to the protective membrane controlling to obtain different adhesion characteristic and bounding force, goes for the requirements such as different adherend surfacenesses;
(3) POE elastomerics density of the present invention is 0.83 ~ 0.90g/cm
3230 DEG C, melting index scope under 2.16kg pressure condition is 3 ~ 10g/10min, molecular weight is between 30000 ~ 80000, molecular weight distributing index is between 1.5 ~ 2.5, molecular weight distribution is narrow, degree of crystallinity is low, the transparency and glossiness excellent, while better with other resin compatible;
(4) the present invention relates to a kind of for preventing the attachment of the spot on adherend surface or the surface protection film that scratches, even if to headed by the liquid crystal display used in optical field or touch-screen etc., high to purity requirements adherend, also there is suitable adhesion characteristic, and, the excellent in sliding property at the back side, resistance to adhesive, to unreel the treatability such as characteristic also excellent;
(5) protective membrane interlayer adhesion of the present invention is large, and temperature tolerance is good, binding property and separability good, low brilliant point, cleanliness factor is high, and adhesion strength is also less with temperature and time change, after long-time laminating, do not have bubble to float or alice, preparation method is simple to operate and cost is lower;
(6) preparation method of PET protection film provided by the invention is that one deck extrudes laminating method, bonding coat is extruded afterwards and PET basic unit fits, completely different with preparation method disclosed in prior art (Chinese Patent Application No. is 201410719026.1), base material in contrast patent is different from the base material in the present invention, both are complete inhomogeneities, the product of different service requirements, production technique is not identical yet, preparation method in contrast patent is three-layer co-extruded cooling, basic unit and bonding coat are extruded jointly, and the present invention is one deck extrudes laminating, bonding coat is extruded afterwards and basic unit fits.
Accompanying drawing explanation
Fig. 1 is preparation method's schematic flow sheet of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1
A kind of PET protection film, comprises PET basic unit and bonding coat, and bonding coat adopts metallocene PE (MPE) to make, and wherein, the massfraction of metallocene PE (MPE) is 100%, and density is 0.89g/cm
3, melting index 190 DEG C, be 6.5g/10min under 2.16kg pressure, bondline thickness is 8 μm, and metallocene PE (MPE) is purchased from Mitsui Chemical Co., Ltd..
PET basic unit is application type PET film, its longitudinal tensile strength 227N/mm
2, transverse tensile strength 235N/mm
2; Longitudinal fracture elongation 95%, transverse breakage elongation 97%; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage 1.2%, horizontal percent thermal shrinkage 0.2%; The density of PET film is 1.35g/cm
3, thickness is 38 μm, surface corona value 40 dyne.From Yizheng Fiber Optical plant Materials Co., Ltd.
The preparation process of said protection film is:
Carrying out heating casting technique by after above-mentioned each component proportion: forcing machine extrudes-curtain coating-doubling roller-deburring of mouth mould-to batch, technical process is as shown in Figure 1.Forcing machine is provided with 6 sections of heating, is set to die head temperature by opening for feed: 150 DEG C, 170 DEG C, 190 DEG C, 210 DEG C, 210 DEG C and 210 DEG C.In melt casting processes, die head and doubling roller are the key equipments produced, die design should make material prolong the outflow of whole machine lip even width, die head temperature is set to 210 DEG C, doubling roller surface is through precision work, stabilization of speed, doubling roller temperature controls at 30 DEG C, and doubling roller speed control is at 50m/min.Doubling roller temperature should regulate suitably, and crossing cold or overheatedly all has impact to the mechanical property of film, the transparency and mist degree.There is rubber roller in the front of doubling roller, fused raw material and PET substrate film are pressed together on doubling roller surface immediately, and then improve cooling performance, and Plastic film surface planeness can be made to improve.Film, after thickness adjustment, cuts the slitter edge of film, batches, and adjust winding tension according to the thickness, production rate etc. of film, excessive or too small, face all can be caused wrinkling, affect film planarization, the winding tension in the present embodiment is 50 ns/m simultaneously.
Obtained protective membrane quantitative measurement is as table 1, and the method for the every physical property measurement of the present invention is as follows:
(1) thickness measuring
Adopt Ma Er thickness tester, reference standard is GB/T6672.
(2) tensile strength, elongation at break test
Adopt the Mei Tesi MTS tension testing machine of the U.S., reference standard is GB/T1040.3.
(3) peel test force
Employing section is good for instrument tension testing machine, and reference standard is GB/T2792.
(4) transmittance and mist degree test
Adopt the AT-4725 transmission mist shadow instrument of German BYK chemical company, reference standard is GB/T2410.
The every physical property measurement data sheet of protective membrane in table 1 embodiment 1
At a warm condition, clinging power remains in the increasing degree of 4 times PET protection film under the present embodiment condition, and does not produce residual with affixed object.
Embodiment 2
A kind of PET protection film, comprise PET basic unit and bonding coat, bonding coat adopts metallocene PE (MPE) resin, POE elastomerics, wherein, the massfraction of metallocene PE (MPE) resin is the elastomeric massfraction of 95%, POE is 5%; The density of MPE is 0.90g/cm
3190 DEG C, melting index under 2.16kg pressure condition is 4.5g/10min, procurement of materials are from Mitsui Chemical Co., Ltd., POE thermoplastic elastomer resin is the hydrogenation random copolymers of styrenic polymer block and alkene, Asahi Kasei Corporation of procurement of materials Japan, molecular weight is 30000 ~ 80000, and molecular weight distributing index is between 1.5 ~ 2.5, and density is 0.83g/cm
3, 230 DEG C, melting index is 6.0g/10min under 2.16kg pressure condition, bondline thickness is 8 μm.
PET basic unit is application type PET film, its longitudinal tensile strength 234N/mm
2, transverse tensile strength 241N/mm
2; Longitudinal fracture elongation 112%, transverse breakage elongation 99%; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage 1.0%, horizontal percent thermal shrinkage 0.2%; The density of PET film is 1.35g/cm
3, thickness is 38 μm, and surface corona value 40 dyne, from Yizheng Fiber Optical plant Materials Co., Ltd.
The preparation process of said protection film is with embodiment 1.
Obtained protective membrane quantitative measurement is as table 2.
The every physical property measurement data sheet of table 2 embodiment 2 protective membrane
PET protection film clinging power under the present embodiment condition is stablized, and after heating, clinging power range-controllable is within 4 times, affixed object does not leave residue.
Embodiment 3
A kind of PET protection film; comprise PET basic unit and bonding coat; bonding coat adopts metallocene PE (MPE) resin and POE elastomerics to make; wherein; the massfraction of metallocene PE (MPE) resin is 70%; the elastomeric massfraction of POE is the density of 30%, MPE is 0.90g/cm
3190 DEG C, melting index under 2.16kg pressure condition is 4.5g/10min, material source Mitsui Chemical Co., Ltd., POE thermoplastic elastomer resin is the hydrogenation random copolymers of styrenic polymer block and alkene, Asahi Kasei Corporation of procurement of materials Japan, molecular weight is 30000 ~ 80000, and molecular weight distributing index is between 1.5 ~ 2.5, and density is 0.88g/cm
3, 230 DEG C, melting index under 2.16kg pressure condition is 5.0g/10min.Material source is in Japanese Asahi Kasei Corporation, and bondline thickness is 6 μm.
PET basic unit is application type PET film, its longitudinal tensile strength 241N/mm
2, transverse tensile strength 232N/mm
2; Longitudinal fracture elongation 118%, transverse breakage elongation 107%; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage 1.1%, horizontal percent thermal shrinkage 0.3%; The density of PET film is 1.35g/cm
3, thickness is 50 μm, surface corona value 40 dyne.From Yizheng Fiber Optical plant Materials Co., Ltd.
The preparation process of said protection film with embodiment 1, unlike: the winding tension in the present embodiment is 80 ns/m.
Obtained protective membrane quantitative measurement is as table 3.
The every physical property measurement data sheet of table 3 embodiment 3 protective membrane
PET protection film high clinging power under the present embodiment condition, Gao Tingxing, heatproof, noresidue.
Embodiment 4
A kind of PET protection film, comprise PET basic unit and bonding coat, bonding coat employing metallocene PE (MPE) resin, POE elastomerics are made, wherein, the massfraction of metallocene PE (MPE) resin is the elastomeric massfraction of 50%, POE is 50%; The density of MPE is 0.90g/cm
3, 190 DEG C, melting index under 2.16kg pressure condition is 4.5g/10min, material source Mitsui Chemical Co., Ltd.; POE thermoplastic elastomer resin is the hydrogenation random copolymers of styrenic polymer block and alkene, and Asahi Kasei Corporation of procurement of materials Japan, molecular weight is 30000 ~ 80000, and molecular weight distributing index is between 1.5 ~ 2.5, and density is 0.863g/cm
3, 230 DEG C, melting index is 5.0g/10min under 2.16kg pressure condition.Material source U.S. Ke Teng polymkeric substance company limited, bondline thickness is 4 μm.
PET basic unit is application type PET film, its longitudinal tensile strength 213N/mm
2, transverse tensile strength 204N/mm
2; Longitudinal fracture elongation 105%, transverse breakage elongation 94%; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage 1.0%, horizontal percent thermal shrinkage 0.2%; The density of PET film is 1.35g/cm
3, thickness is 100 μm, surface corona value 40 dyne.From Yizheng Fiber Optical plant Materials Co., Ltd.
The preparation process of said protection film with embodiment 1, unlike: the winding tension in the present embodiment is 100 ns/m.
Obtained protective membrane quantitative measurement is as table 4.
The every physical property measurement data sheet of table 4 embodiment 4 protective membrane
PET protection film high clinging power under the present embodiment condition, can do effective laminating with uneven surface, and very property is good, heatproof, noresidue.
Embodiment 5
A kind of PET protection film, comprise PET basic unit and bonding coat, bonding coat employing metallocene PE (MPE) resin, POE elastomerics are made, wherein, the massfraction of metallocene PE (MPE) resin is the elastomeric massfraction of 60%, POE is 40%; The density of MPE is 0.89g/cm
3, 190 DEG C, melting index is 3.5g/10min under 2.16kg pressure, material source Mitsui Chemical Co., Ltd.; POE thermoplastic elastomer resin is the hydrogenation random copolymers of styrenic polymer block and alkene, and Asahi Kasei Corporation of procurement of materials Japan, molecular weight is 30000 ~ 80000, and molecular weight distributing index is between 1.5 ~ 2.5, and density is 0.90g/cm
3, 230 DEG C, melting index under 2.16kg pressure condition is 3.0g/10min.Material source U.S. Ke Teng polymkeric substance company limited, bondline thickness is 8 μm.
PET basic unit is application type PET film, its longitudinal tensile strength 216N/mm
2, transverse tensile strength 221N/mm
2; Longitudinal fracture elongation 112%, transverse breakage elongation 99%; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage 1.0%, horizontal percent thermal shrinkage 0.2%; The density of PET film is 1.35g/cm
3, thickness is 188 μm, surface corona value 40 dyne.From Yizheng Fiber Optical plant Materials Co., Ltd.
The preparation process of said protection film with embodiment 1, unlike: the winding tension in the present embodiment is 150 ns/m.
Obtained protective membrane quantitative measurement is as table 5.
The every physical property measurement data sheet of table 5 embodiment 5 protective membrane
PET protection film clinging power under the present embodiment condition is medium, and can fit with diffusion barrier surface, very property is good, heatproof, noresidue.
Claims (8)
1. a PET protection film, comprises PET basic unit and bonding coat, it is characterized in that: described bonding coat is made up of metallocene PE and POE elastomerics, wherein, the massfraction of metallocene PE is the elastomeric massfraction of 50 ~ 100%, POE is 0 ~ 50%; Described PET basic unit is PET film.
2. a kind of PET protection film according to claim 1; it is characterized in that: the integral thickness of described PET protection film is 30 ~ 196 μm, and the thickness of PET basic unit is 25 ~ 188 μm, accounts for 85 ~ 96% of integral thickness; bondline thickness is 4 ~ 8 μm, accounts for 4 ~ 15% of integral thickness.
3. a kind of PET protection film according to claim 1, is characterized in that: the molecular weight of the metallocene PE described in bonding coat is 40000 ~ 70000, and its density is 0.89 ~ 0.90g/cm
3, 190 DEG C, melting index under 2.16kg pressure condition is 5 ~ 6.5g/10min; Described POE elastomerics is the hydrogenation random copolymers of styrenic polymer block and alkene, POE elastomerics 230 DEG C, melting index is 3 ~ 6g/10min under 2.16kg pressure condition, molecular weight is 30000 ~ 80000, its density is 0.83 ~ 0.90g/cm
3.
4. a kind of PET protection film according to claim 1, is characterized in that: the longitudinal direction of described PET basic unit and transverse tensile strength all>=220N/mm
2; Longitudinally>=80% equal with transverse breakage elongation; Under 150 DEG C/15min condition, longitudinal percent thermal shrinkage≤2.0%, horizontal percent thermal shrinkage≤0.5%.
5. the preparation method of a kind of PET protection film described in claim 1, the steps include:
(1) melt extrude: by the raw materials melt coextrusion of bonding coat, the feedstream after melting is extended down to the die head position of forcing machine;
(2) mouth mould curtain coating: the raw material after melting is cast on doubling roller by the mouth mould of die head;
(3) cool, fit: the feedstream after per os mould curtain coating is extended down on doubling roller, together with laminating with PET basic unit, cooling forming simultaneously;
(4) deburring, rolling: cut the slitter edge of film, batch, obtain described PET protection film.
6. the preparation method of a kind of PET protection film according to claim 5, is characterized in that: opening for feed to the temperature of die head of forcing machine sets gradually in described step (1) is 150 DEG C, 170 DEG C, 190 DEG C, 210 DEG C, 210 DEG C, 210 DEG C.
7. the preparation method of a kind of PET protection film according to claim 5, is characterized in that: in described step (3), doubling roller temperature controls at 30 DEG C, and doubling roller speed control is at 50m/min.
8. the preparation method of a kind of PET protection film according to claim 5, is characterized in that: batching time control controlling rolling tension force in described step (4) is 50-150 n/m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474522A (en) * | 2017-06-30 | 2017-12-15 | 苏州奥斯汀新材料科技有限公司 | A kind of preparation method of TPUE film |
| CN110699001A (en) * | 2019-10-12 | 2020-01-17 | 常州浩阳水性新材料有限公司 | PET (polyethylene terephthalate) laminated adhesive film for card tape |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134458A (en) * | 2011-03-24 | 2011-07-27 | 昆山博益鑫成高分子材料有限公司 | PET (polyethylene terephthalate) protective film for preparing flat-panel display |
| CN104626699A (en) * | 2015-03-04 | 2015-05-20 | 张家港康得新光电材料有限公司 | Self-adhered protective membrane and application thereof |
-
2015
- 2015-08-20 CN CN201510514526.6A patent/CN105017988B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134458A (en) * | 2011-03-24 | 2011-07-27 | 昆山博益鑫成高分子材料有限公司 | PET (polyethylene terephthalate) protective film for preparing flat-panel display |
| CN104626699A (en) * | 2015-03-04 | 2015-05-20 | 张家港康得新光电材料有限公司 | Self-adhered protective membrane and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474522A (en) * | 2017-06-30 | 2017-12-15 | 苏州奥斯汀新材料科技有限公司 | A kind of preparation method of TPUE film |
| CN107474522B (en) * | 2017-06-30 | 2020-07-03 | 苏州奥斯汀新材料科技有限公司 | Preparation method of thermoplastic polyurethane elastomer film |
| CN110699001A (en) * | 2019-10-12 | 2020-01-17 | 常州浩阳水性新材料有限公司 | PET (polyethylene terephthalate) laminated adhesive film for card tape |
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| Publication number | Publication date |
|---|---|
| CN105017988B (en) | 2018-04-20 |
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