CN102108193A - White polyester film to be coated on surface of metal sheet and manufacturing method thereof - Google Patents

White polyester film to be coated on surface of metal sheet and manufacturing method thereof Download PDF

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Publication number
CN102108193A
CN102108193A CN2009102599030A CN200910259903A CN102108193A CN 102108193 A CN102108193 A CN 102108193A CN 2009102599030 A CN2009102599030 A CN 2009102599030A CN 200910259903 A CN200910259903 A CN 200910259903A CN 102108193 A CN102108193 A CN 102108193A
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polyester film
tio
modified poly
poly ester
master batch
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CN2009102599030A
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CN102108193B (en
Inventor
赵宇晖
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Origen Polytron Technologies Inc
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BEIJING ORG XINMEI CAN MANUFACTURING CO LTD
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/9258Velocity
    • B29C2948/9259Angular velocity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92609Dimensions
    • B29C2948/92647Thickness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92704Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92857Extrusion unit
    • B29C2948/92876Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885Screw or gear
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92857Extrusion unit
    • B29C2948/92876Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895Barrel or housing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

The invention discloses a white polyester film to be coated on the surface of a metal sheet and a manufacturing method thereof. The polyester film consists of modified polyester and TiO2, wherein the modified polyester is m-phthalic acid-modified polyethylene glycol terephthalate, the m-phthalic acid molar content in the modified polyester is 9 to 15 percent, and the mass percentage of the TiO2 is 7 to 30 percent. The invention also discloses the manufacturing method of the polyester film. The polyester film has the characteristics of high tensile strength, high modulus of elasticity, high barrier property, high heat resistance, high cod resistance and simple and convenient manufacturing process, and is suitable to be coated on the surface of the metal sheet for making a tank in place of a white coating process in the conventional tank making.

Description

Be used to be fitted in the white polyester film and the manufacture method thereof of metal sheet surface
Technical field
The present invention relates to the polyester film technical field, particularly a kind ofly be used for the white biaxial stretching polyester film that the mental package industry is fitted in metal sheet surface, a kind ofly specifically be used to be fitted in single-layer bidirectional stretching white polyester film and the manufacture method thereof that steel sheet or thin aluminum sheet surface are used to make jar.
Background technology
The advantage of biaxially oriented polyester film be superpolymer be heated and the work of pulling force under, produced stretch orientation to a certain degree, make molecule or molecular chain ordered arrangement, its result improves the polyester film performance after the stretching.The tensile strength, the Young's modulus that specifically are film obviously increase, and the smooth finish of film, transparency improve, because molecular arrangement barrier property in good order makes moderate progress, heat-resisting winter hardiness, dimensional stability improve.
Polyester film is very extensive in the application in soft packaging field, but the application in the mental package industry is also fewer.The can body material is generally Tinplate, Tinfree Steelor TFS or thin aluminum sheet in the metal system jar industry, and it is exposed in the wet environment and all can gets rusty, therefore jar outer corrosion protection that needs.Simultaneously people also more and more pay attention to the exterior quality of jar, and a paper label or jar outer rust proof paint that is coated with are replaced gradually by the outer design printing of the jar of fineness, and the glamour that shows personalized demand and brand younger generation's pursuing of goal especially.So existing solution is to smear a coating at the outside surface of system jar metallic substance, but promptly whitewashes fourth, carries out multicolor printing on the surface of coating then.But but whitewash fourth technology some shortcomings are arranged also, poisonous and harmful organic solvent volatilization in the coating process, coating price is higher, coating apparatus and complex process.Consider polyester film physical strength height, good in optical property, use temperature is wide, barrier property is good, oil resistant, corrosion-resistant, characteristics such as cost is low, polyester film is fitted in metal sheet surface, and to replace the coating process in the metal system jar be the another new focus of world's thin film fabrication industry and mental package industry research, is a new technology that market outlook are boundless, research still is in the starting stage so exploitation is fit to be fitted in the polyester film that metal sheet surface is used for making tank body.
Patent CN 101381508A is day on March 11st, 2009 openly, has introduced a kind of white biaxial stretching polyester film and production method thereof.The raw material of this polyester film has used polyester that light section, white master batch, toning agent, stablizer are arranged greatly, what this polyester film was mainly considered is the shading performance, polyester in the raw material does not have modification, cause fusing point too high, crystallization velocity is too fast relatively in the course of processing, is not suitable for film heat is fitted in metal sheet surface and following process; Polyester in the raw material does not pass through modification simultaneously, and the fabrication process parameters of film also has difference, and method of the present invention is relatively low.
Patent CN 1126139A is day on July 10th, 1996 openly, has introduced a kind of polyester film that is used for thin metal layer and covered.The purposes of the white polyester film described in this patent is to be bonded in metal sheet surface, and is very similar to purposes of the present invention.This polyester film is a bilayer structure, modified poly ester is different with the modified poly ester that the present invention adopts, shortcoming is: it is too high that polyester and steel sheet or thin aluminum sheet hot paste are closed temperature, and double membrane structure causes layering between film and metal substrate easily, comes off in follow-up can manufacturing technology process.
Patent CN 1327462A is day December 19 calendar year 2001 openly, has introduced a kind of Biaxially stretched polyester film for forming.The purposes of the polyester film described in this patent is very similar to the present invention.But the polyester in its raw material does not pass through modification, causes fusing point too high, and crystallization velocity is too fast relatively in the course of processing, is not suitable for this film heat is fitted in metal sheet surface and following process.
Summary of the invention
In order to overcome the volatilization of poisonous and harmful organic solvent in the coating process, coating price is higher, coating apparatus and complex process, conventional polyester film fusing point is higher to be not suitable for being fitted in the metallic film surface, multi-layered polyester film and metal sheet fit the layering that may cause with problem such as come off.The invention provides a kind of white polyester film and manufacture method thereof that is used to be fitted in metal sheet surface.
The technical solution adopted for the present invention to solve the technical problems is: a kind of white polyester film that is used to be fitted in metal sheet surface is provided, and this polyester film is by modified poly ester and TiO 2Form, wherein modified poly ester is the polyethylene terephthalate of isophthalate modified, in the modified poly ester content mol ratio of m-phthalic acid 9%~15%, TiO 2Massfraction be 7%~30%.
In order to obtain above-mentioned white polyester film, manufacture method of the present invention is made up of following processing step, and the first step prepares modified poly ester light section and TiO greatly 2Master batch, modified poly ester have light section to be the polyethylene terephthalate of isophthalate modified greatly, and the content mol ratio of m-phthalic acid is 9%~15%, TiO 2At TiO 2Massfraction in the master batch is 30%~40%, TiO 2All the other are the polyethylene terephthalate of aforesaid isophthalate modified in the master batch, and second step was made white polyester film, earlier modified poly ester are had light section and TiO greatly 2Master batch is dried on ebullated bed, and 130 ℃~150 ℃ of bake out temperatures, drying time 4 hours, 80~30 parts of modified poly esters after will drying again have light section and 20~70 parts of TiO greatly 2The master batch thorough mixing after single screw extrusion machine extrude, extruding dies is an individual layer mouth mould, extrusion temperature is 120 ℃~260 ℃, screw speed is 60~120 commentaries on classics/min, extrude the back chilling and become the casting sheet, casting sheet gauge control is at 0.1mm~0.4mm, the casting sheet is through longitudinal stretching, the cross directional stretch film forming, indulge and draw preheating temperature at 80 ℃~120 ℃, stretch ratio 3.0~4.5, the horizontal preheating temperature of drawing is at 90 ℃~150 ℃, stretch ratio 3.0~4.5, film after the stretching is 160 ℃~210 ℃ heat setting types, heat-setting time 5S~15S, and the film after the heat setting type cools off, rolling and cutting.
In order to make white polyester film be suitable for being fitted in metal sheet surface, need to reduce the fusing point of polyester film, improve the crystallizing power of thin-film material, guarantee that film obtains moderate degree of crystallinity and crystallization velocity, the bonding force between reinforced polyester film and metal substrate in the following process process.The present invention has adopted the polyethylene terephthalate through isophthalate modified, and wherein the content mol ratio of m-phthalic acid is 9%~15%, and the fusing point of modified poly ester is at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃.Because the use of this film is in order to carry out multicolor printing on its surface, having only background color is white, the spectrum of all kinds in the reflected white-light fully, and each color ink that promptly is printed on its surface is quality accurately, is chosen in to add TiO in the polyester film 2So that polyester film becomes white, TiO 2Massfraction be 7%~30%, preferred 7%~25%, TiO simultaneously 2Adding increased surfaceness and can also prevent adhesion between polyester film, the thickness of this white polyester film is 12 μ m~22 μ m, 190 ℃, 10 minutes percent thermal shrinkage is 4%~7%, polyester film can be in 200 ℃~250 ℃ heat posted be combined in the surface of steel sheet or thin aluminum sheet.
The manufacturing film at first will prepare modified poly ester light section and TiO greatly 2Master batch is with TiO 2With TiO 2The form of master batch adds can make its good dispersion in polyester film, TiO 2TiO in the master batch 2Massfraction be 30%~40%, in order to make TiO 2Master batch and modified poly ester have greatly between the light section and have good intermiscibility, TiO 2The matrix resin of master batch is the polyethylene terephthalate of aforesaid isophthalate modified.Modified poly ester has light section and TiO greatly 2The add-on summation of master batch is 100 parts, if i.e. TiO 2The add-on of master batch is 30 parts, and then the add-on of light section is arranged greatly is 70 parts to modified poly ester.For the thickness that makes polyester film at 12 μ m~22 μ m, in the manufacturing processed of this polyester film, the casting sheet thickness behind the chilling should be controlled at 0.1mm~0.4mm and cooperate stretch ratio 3.0~4.5.When carrying out drawing process, to indulge and draw preheating temperature at 80 ℃~120 ℃, the horizontal preheating temperature of drawing is at 90 ℃~150 ℃.Can behind cooling step, before the rolling step, carry out corona treatment according to the concrete use needs of film to film.
The invention has the beneficial effects as follows: this white polyester film has the physical strength height, use temperature is wide, barrier property is good, oil resistant, characteristics such as corrosion-resistant, with low cost; It is simple and convenient to use this method to make white polyester film, but substitutes original fourth technology of whitewashing, and energy-conserving and environment-protective are polluted little; It is fitted in metal sheet surface and the following process process combine between film and metal substrate firmly, non-scale, wrinkling, layering, come off.
Embodiment
Embodiment 1
Composition of raw materials:
Modified poly ester has the light section greatly: the polyethylene terephthalate of isophthalate modified, and the content mol ratio of m-phthalic acid is 9%,
TiO 2Master batch: TiO 2Massfraction be 35%, matrix is the polyethylene terephthalate of above-mentioned isophthalate modified.
Go out modified poly ester according to above formulation light section and TiO are arranged greatly 2Master batch has light section and TiO greatly with modified poly ester 2Master batch is dried on ebullated bed, 135 ℃ of bake out temperatures, drying time 4 hours.
The raw material test:
Modified poly ester has the fusing point of light section greatly at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃, TiO 2TiO in the master batch 2Massfraction be 35%.
Make film:
80 parts of modified poly esters after the oven dry there are light section and 20 parts of TiO greatly 2The master batch thorough mixing after single screw extrusion machine extrude, extruding dies is an individual layer mouth mould, each section of extruder screw Heating temperature is 120 ℃, 245 ℃, 250 ℃, 255 ℃, 260 ℃ (from spouts to a mouthful mould direction), screw speed is 100 commentaries on classics/min, extrude the back chilling and become the casting sheet, casting sheet thickness is 0.2mm.The casting sheet at first longitudinal stretching, it is vertical that to draw preheating temperature be 90 ℃, stretch ratio 3.5, cross directional stretch then, the horizontal preheating temperature of drawing is 120 ℃, stretch ratio 3.5.Film after the stretching is 180 ℃ of heat setting types, heat-setting time 10S, and last film cools off, rolling and cutting.Performance test:
Figure G2009102599030D00041
Embodiment 2
Composition of raw materials:
Modified poly ester has the light section greatly: the polyethylene terephthalate of isophthalate modified, and the content mol ratio of m-phthalic acid is 12%,
TiO 2Master batch: TiO 2Massfraction be 35%, matrix is the polyethylene terephthalate of above-mentioned isophthalate modified.
Go out modified poly ester according to above formulation light section and TiO are arranged greatly 2Master batch has light section and TiO greatly with modified poly ester 2Master batch is dried on ebullated bed, 135 ℃ of bake out temperatures, drying time 4 hours.
The raw material test:
Modified poly ester has the fusing point of light section greatly at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃, TiO 2TiO in the master batch 2Massfraction be 35%.
Make film:
Process for making is identical with embodiment 1.
Performance test:
Figure G2009102599030D00051
Embodiment 3
Composition of raw materials:
Modified poly ester has the light section greatly: the polyethylene terephthalate of isophthalate modified, and the content mol ratio of m-phthalic acid is 15%,
TiO 2Master batch: TiO 2Massfraction be 35%, matrix is the polyethylene terephthalate of above-mentioned isophthalate modified.
Go out modified poly ester according to above formulation light section and TiO are arranged greatly 2Master batch has light section and TiO greatly with modified poly ester 2Master batch is dried on ebullated bed, 135 ℃ of bake out temperatures, drying time 4 hours.
The raw material test:
Modified poly ester has the fusing point of light section greatly at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃, TiO 2TiO in the master batch 2Massfraction be 35%.
Make film:
Process for making is identical with embodiment 1.
Performance test:
Figure G2009102599030D00061
Embodiment 4
Composition of raw materials:
Modified poly ester has the light section greatly: the polyethylene terephthalate of isophthalate modified, and the content mol ratio of m-phthalic acid is 12%,
TiO 2Master batch: TiO 2Massfraction be 35%, matrix is the polyethylene terephthalate of above-mentioned isophthalate modified.
Go out modified poly ester according to above formulation light section and TiO are arranged greatly 2Master batch has light section and TiO greatly with modified poly ester 2Master batch is dried on ebullated bed, 135 ℃ of bake out temperatures, drying time 4 hours.
The raw material test:
Modified poly ester has the fusing point of light section greatly at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃, TiO 2TiO in the master batch 2Massfraction be 35%.
Make film:
Making film selects for use 55 parts of modified poly esters that light section and 45 parts of TiO are arranged greatly 2Master batch, process for making is identical with embodiment 1.
Performance test:
Figure G2009102599030D00062
Figure G2009102599030D00071
Embodiment 5
Composition of raw materials:
Modified poly ester has the light section greatly: the polyethylene terephthalate of isophthalate modified, and the content mol ratio of m-phthalic acid is 12%,
TiO 2Master batch: TiO 2Massfraction be 35%, matrix is the polyethylene terephthalate of above-mentioned isophthalate modified.
Go out modified poly ester according to above formulation light section and TiO are arranged greatly 2Master batch has light section and TiO greatly with modified poly ester 2Master batch is dried on ebullated bed, 135 ℃ of bake out temperatures, drying time 4 hours.
The raw material test:
Modified poly ester has the fusing point of light section greatly at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃, TiO 2TiO in the master batch 2Massfraction be 35%.
Make film:
Making film selects for use 30 parts of modified poly esters that light section and 70 parts of TiO are arranged greatly 2Master batch, process for making is identical with embodiment 1.Behind cooling step, before the rolling step, film is carried out corona treatment.
Performance test:
Figure G2009102599030D00072
Embodiment 6
Composition of raw materials:
Modified poly ester has the light section greatly: the polyethylene terephthalate of isophthalate modified, and the content mol ratio of m-phthalic acid is 12%,
TiO 2Master batch: TiO 2Massfraction be 40%, matrix is the polyethylene terephthalate of above-mentioned isophthalate modified.
Go out modified poly ester according to above formulation light section and TiO are arranged greatly 2Master batch has light section and TiO greatly with modified poly ester 2Master batch is dried on ebullated bed, 135 ℃ of bake out temperatures, drying time 4 hours.
The raw material test:
Modified poly ester has the fusing point of light section greatly at 210 ℃~230 ℃, and second-order transition temperature is at 60 ℃~80 ℃, TiO 2TiO in the master batch 2Massfraction be 40%.
Make film:
Making film selects for use 50 parts of modified poly esters that light section and 50 parts of TiO are arranged greatly 2Master batch, process for making is identical with embodiment 1.Just casting sheet thickness is 0.3mm, and horizontal Lapie and vertical Lapie are 4.0.Behind cooling step, before the rolling step, film is carried out corona treatment.
Performance test:
Figure G2009102599030D00081
With the prepared white polyester film that goes out of embodiment 1~6 under 240 ℃, 6Kg pressure respectively heat fit on the thick Tinfree Steelor TFS of the 0.20mm surface, be washed into the cup-shaped sample of diameter 30mm, dark 8mm with dashing will the fit Tinfree Steelor TFS of white polyester film of cup experimental machine, do not have between film and the metal substrate in the impact process separate, unsticking.Should place 121 ℃ of distilled water boiling 30min by cup-shaped sample, film surface is wrinkle resistant, with between the metal substrate do not separate.Should place 121 ℃ by cup-shaped sample, boiling 30min in 3% acetum, film surface is wrinkle resistant, with between the metal substrate do not separate.
With the prepared white polyester film that goes out of embodiment 1~6 under 240 ℃, 6Kg pressure respectively heat fit on the 0.20mm thickness surface of aluminum plate, be washed into the cup-shaped sample of diameter 30mm, dark 8mm with dashing will the fit thin aluminum sheet of white polyester film of cup experimental machine, do not have between film and the metal substrate in the impact process separate, unsticking.Should place 121 ℃ of distilled water boiling 30min by cup-shaped sample, film surface is wrinkle resistant, with between the metal substrate do not separate.Should place 121 ℃ by cup-shaped sample, boiling 30min in 3% acetum, film surface is wrinkle resistant, with between the metal substrate do not separate.
With the prepared white polyester film that goes out of embodiment 1~6 under 210 ℃, 6Kg pressure respectively heat fit on the thick Tinplate of the 0.20mm surface, be washed into the cup-shaped sample of diameter 30mm, dark 8mm with dashing will the fit Tinplate of white polyester film of cup experimental machine, do not have between film and the metal substrate in the impact process separate, unsticking.Should place 121 ℃ of distilled water boiling 30min by cup-shaped sample, film surface is wrinkle resistant, with between the metal substrate do not separate.Should place 121 ℃ by cup-shaped sample, boiling 30min in 3% acetum, film surface is wrinkle resistant, with between the metal substrate do not separate.
Above implementation process can illustrate that white polyester film provided by the present invention can be fitted in steel sheet and thin aluminum sheet surface, is fit to following process.

Claims (9)

1. a white polyester film that is used to be fitted in metal sheet surface is the single-layer bidirectional oriented polyester film, and it is characterized in that: this polyester film is by modified poly ester and TiO 2Form, wherein modified poly ester is the polyethylene terephthalate of isophthalate modified, in the modified poly ester content mol ratio of m-phthalic acid 9%~15%, TiO 2Massfraction be 7%~30%.
2. white polyester film according to claim 1 is characterized in that: the fusing point of modified poly ester is at 210 ℃~230 ℃.
3. white polyester film according to claim 1 is characterized in that: TiO in this polyester film 2Massfraction be 7%~25%.
4. white polyester film according to claim 1 is characterized in that: the second-order transition temperature of modified poly ester is at 60 ℃~80 ℃.
5. white polyester film according to claim 1 is characterized in that: the thickness of this polyester film is 12 μ m~22 μ m.
6. white polyester film according to claim 1 is characterized in that: this polyester film is 4%~7% at 190 ℃, 10 minutes percent thermal shrinkage.
7. white polyester film according to claim 1 is characterized in that: this polyester film is fitted in the heat posted on steel sheet or thin aluminum sheet surface and closes temperature at 200 ℃~250 ℃.
8. method of making the described white polyester film of claim 1 is used the two-way stretch method, and it is characterized in that this method is made up of following processing step: the first step prepares modified poly ester has light to cut into slices and TiO greatly 2Master batch, modified poly ester have light section to be the polyethylene terephthalate of isophthalate modified greatly, and the content mol ratio of m-phthalic acid is 9%~15%, TiO 2At TiO 2Massfraction in the master batch is 30%~40%, TiO 2All the other are the polyethylene terephthalate of aforesaid isophthalate modified in the master batch, and second step was made white polyester film, earlier modified poly ester are had light section and TiO greatly 2Master batch is dried on ebullated bed, and 130 ℃~150 ℃ of bake out temperatures, drying time 4 hours, 80~30 parts of modified poly esters after will drying again have light section and 20~70 parts of TiO greatly 2The master batch thorough mixing after single screw extrusion machine extrude, extruding dies is an individual layer mouth mould, extrusion temperature is 120 ℃~260 ℃, screw speed is 60~120 commentaries on classics/min, extrude the back chilling and become the casting sheet, casting sheet gauge control is at 0.1mm~0.4mm, the casting sheet is through longitudinal stretching, the cross directional stretch film forming, indulge and draw preheating temperature at 80 ℃~120 ℃, stretch ratio 3.0~4.5, the horizontal preheating temperature of drawing is at 90 ℃~150 ℃, stretch ratio 3.0~4.5, film after the stretching is 160 ℃~210 ℃ heat setting types, heat-setting time 5S~15S, and the film after the heat setting type cools off, rolling and cutting.
9. manufacture method according to claim 8 is characterized in that: can be according to using needs carry out corona treatment to this polyester film behind cooling step, before the rolling step.
CN200910259903.0A 2009-12-23 2009-12-23 White polyester film to be coated on surface of metal sheet and manufacturing method thereof Active CN102108193B (en)

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Cited By (8)

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CN102602104A (en) * 2012-02-28 2012-07-25 湖北图新材料科技有限公司 BOPET (biaxially oriented polyester) matte white film substrate for preparing labels and preparation method thereof
CN103387660A (en) * 2012-05-11 2013-11-13 天津华新盈聚酯材料科技有限公司 Preparation method of polyester slices for shrink films
CN105437705A (en) * 2015-12-24 2016-03-30 上海联净复合材料技术有限公司 Iron-coating film and coated iron with iron-coating film
CN105437704A (en) * 2015-12-24 2016-03-30 上海联净复合材料技术有限公司 Iron-coating film and coated iron with iron-coating film
CN105619982A (en) * 2015-12-24 2016-06-01 上海联净复合材料技术有限公司 Iron coating film and coated iron adopting same
CN106003917A (en) * 2016-06-24 2016-10-12 周开雄 Steel laminating film and preparation method thereof
CN106957616A (en) * 2017-05-05 2017-07-18 杭州大华塑业有限公司 A kind of printable covers iron film and preparation method thereof
CN113270312A (en) * 2021-05-13 2021-08-17 中国振华集团永光电子有限公司(国营第八七三厂) Method for improving CVD surface defects

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