CN1660935A - Polyester film and producing method - Google Patents
Polyester film and producing method Download PDFInfo
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- CN1660935A CN1660935A CN 200410039195 CN200410039195A CN1660935A CN 1660935 A CN1660935 A CN 1660935A CN 200410039195 CN200410039195 CN 200410039195 CN 200410039195 A CN200410039195 A CN 200410039195A CN 1660935 A CN1660935 A CN 1660935A
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- polyester film
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Abstract
A polyester film with high thermal stability, mechanical strength and optical properties is proportionally prepared from polyester chips, organic additive and inorganic additive through mixing, drying, fusing while extruding out, cooling on rollers to become thick sheet, preheating, longitudinal stretching, preheating, transverse stretching thermal fixating, cooling and coiling.
Description
Technical field
The present invention relates to a kind of polyester film and production method thereof.
Technical background
Polyester film is because good physicochemical property, and purposes is very extensive, but shifts the field at high temperature, and except physical and mechanical properties, also planarization and the non-viscosity to film surface has proposed certain requirement to the requirement of polyester film.In certain field as layout drawing, sputtering sedimentation etc., require that the Film Optics performance is good, high transmission rate, low haze.
Shift at high temperature, in the production process as Furniture panel, after the plate surface japanning, in order to help coating with lacquer the levelling on surface, cover polyester film, peel off polyester film behind the hot setting again, this kind polyester film can use repeatedly.The film of this purposes requires its thermal dimensional stability good, and high temperature is no tangible size distortion, smooth down, and chemical property is stable, and film surface is smooth, and film surface does not have resistates when shifting, and can repeatedly use.
From structural unit, polyester molecule lacks demoulding.For giving its this specific character, the general material that uses at its surface coated demoulding composition, all told about the surface property that improves film by the method for silicone-coating as U.S. Pat 5672428, US 4851166, US 3427270, the requirement that cannot not reach stickingly.But there are the problems such as environmental pollution of production process complexity, energy consumption height, solvent evaporates in this method, and there are shortcomings such as poor optical properties, haze value raising in the polyester film after the modification in this way.
It is good that Chinese patent CN1327462A discloses with metal level and property, and guarantor's flavor property is good, and the polyester film that non-adhesive is good, this polyester film mainly are by adding waxy compound Ka Naba wax, achieving the above object.
But Ka Naba wax price is high and be prone to vibrin and be separated, thereby influences the optical property of film.
U.S. Pat 4677188 discloses by the processing condition in the control stretching process and has reached film good optical performance, but has the not shortcoming that can significantly not improve of viscosity of film surface.
Summary of the invention
The objective of the invention is, a kind of polyester film of transparent smooth is provided, this kind polyester film has the good optical performance, and release property is good simultaneously, can repeat repeatedly to use.
Another object of the present invention is, a kind of production method of transparent smooth polyester film is provided, this method overcome produce complicated, energy consumption is high and problem such as the production process solvent evaporates produced pollution.
Technical scheme of the present invention is: a kind of polyester film, by polyester slice, organic additive) inorganic additives forms, its each components contents (weight percent) is:
Polyester slice 98～100%
Organic additive 0～2.0%
Inorganic additives 0～0.01%
A kind of preferred version, wherein said each components contents (weight percent) is:
Polyester slice 98.5～99.99%
Organic additive 0.01～1.5%
Inorganic additives 0～0.003%
A kind of preferred version, wherein said polyester slice are that limiting viscosity is the terephthalic acid of 0.62dL/g～0.85dL/g and the polycondensate of ethylene glycol.
A kind of preferred version, wherein said organic additive are the amides organic additives, preferably ethylene bimonthly osmanthus acid amides or ethylene bis stearamide.
A kind of preferred version, wherein said inorganic additives is meant silicon-dioxide, kaolin, lime carbonate or titanium dioxide, preferred silicon-dioxide.
Another technical scheme of the present invention is, a kind of preparation method of polyester film is characterized in that, its preparation method may further comprise the steps:
1) with polyester slice, organic additive, inorganic additives mixing, drying;
2) melt extrude dry sliced, melt is cooled to sheet on slab roller;
3) with after the sheet preheating that is cooled to, 3.0～4.0 times of longitudinal stretchings;
4) with after the diaphragm preheating behind the longitudinal stretching, 3.0～4.0 times of cross directional stretchs;
5) the film heat setting type after will stretching, rolling after cooling obtains polyester film.
A kind of preferred version, wherein said drying temperature are 140 ℃～180 ℃.
A kind of preferred version, the wherein said dry sliced temperature that melt extrudes is 260 ℃～290 ℃.
A kind of preferred version, wherein said film heat setting temperature are 210 ℃～250 ℃.
The polyester slice that is used for two-way stretch mainly is meant the condenses of diprotic acid and dibasic alcohol, and wherein, diprotic acid can be a straight chain fatty acid, but mainly is aromatic diacid, as terephthalic acid, to phenylene-diacetic acid, to naphthalic acid etc.; Dibasic alcohol mainly is that carbonatoms is 2～4 aliphatic diol, as ethylene glycol, propylene glycol, butyleneglycol etc.Except mentioned component, polyester slice can also be the polyester that adds the modification of materials such as a spot of m-phthalic acid, phthalic acid.Polyester slice preferred characteristics viscosity in the invention is the terephthalic acid of 0.62dL/g～0.85dL/g and the polycondensate of ethylene glycol.
In order to give the release property of polyester film, disclosed method is at polyester film surface coating demoulding material or uses Ka Naba wax to give the film release property as organic additive in the thin film fabrication process, but this method exists energy consumption height and solvent evaporates easily to cause shortcomings such as environmental pollution.In addition, because the consistency of Ka Naba wax and vibrin is bad, also influence the optical property of film.The organic additive that uses during polyester film is produced except Ka Naba wax, can also use Metallic stearates class material maybe can bear the amide substance of the extrusion temperature that is higher than 280 ℃.Though Metallic stearates class material has improved the surface property of film because its thermostability is bad, in extrusion, easily decompose, thereby influence product quality.Be fit to the preferred ethylene of organic additive of the present invention bimonthly osmanthus acid amides or ethylene bis stearamide.
Among the present invention, in order to control the roughness of film, adjust the operating performance of film, adjust by in prescription, adding an amount of inorganic additives, being fit to inorganic additives of the present invention can be silicon-dioxide, kaolin, lime carbonate or titanium dioxide, preferred silicon-dioxide.
Polyester film of the present invention is made up of polyester slice, organic additive, inorganic additives, and its each components contents (weight percent) is:
Polyester slice 98～100%
Organic additive 0.01%～2.0%
Inorganic additives 0～0.01%
Being fit to a screening formulation of the present invention is:
Polyester slice 98.5%～99.99%
Organic additive 0.01%～1.5%
Inorganic additives 0～0.003%
All told about the surface property that improves film by the method for silicone-coating among U.S. Pat 5672428, US 4851166, the US 3427270, but there are the problems such as environmental pollution of production process complexity, energy consumption height, solvent evaporates in this method, and also there are shortcomings such as poor optical properties, haze value raising in the polyester film after the modification in this way.
In order to solve the shortcoming that existing method exists, the preparation method of the polyester film among the present invention may further comprise the steps:
1) with polyester slice, organic additive, inorganic additives mixing, drying;
2) melt extrude dry sliced, melt is cooled to sheet on slab roller;
3) with after the sheet preheating that is cooled to, 3.0～4.0 times of longitudinal stretchings;
4) with after the diaphragm preheating behind the longitudinal stretching, 3.0～4.0 times of cross directional stretchs;
5) the film heat setting type after will stretching, rolling after cooling obtains polyester film.
Among the present invention, organic additive, inorganic additives can be directly and dry good polyester slice before extruding, mix, also can make masterbatch and before drying, mix with polyester slice.
The concrete preparation process of polyester film of the present invention is: polyester slice, organic additive, inorganic additives are joined in the blender according to the ratio in the prescription, after mixing, 140 ℃～180 ℃ dryings; Dry slicedly melt extrude under 260 ℃～290 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 15 ℃～30 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.0～4.0 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, after 95 ℃～110 ℃ following preheatings, 3.0～4.0 times of cross directional stretchs are 210 ℃～250 ℃ following heat setting types through the preheating zone, cooling is after side cut, thickness measuring, rolling obtain the polyester film that surface tension is 30dyn/cm～44dyn/cm.This polyester film thickness deviation is little, and is apparent smooth, Heat stability is good, and the physical strength height, surface property is good, has the good optical performance, and release property is good simultaneously, can repeat repeatedly to use.
Polyester film provided by the invention is transparent, smooth, be mainly used in high temperature shift field and other to the Film Optics performance requriements than higher field.
Embodiment
The present invention is described further below in conjunction with specific embodiment.
Embodiment 1
Prescription:
Polyethylene terephthalate (IV 0.62dL/g) 20Kg
Ethylene bis stearamide 2g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, the organic additive ethylene bis stearamide 2g of 0.62dL/g joins in the blender, after mixing, 170 ℃ of dryings; Dry slicedly melt extrude under 280 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 30 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.30 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 110 ℃ of following preheatings, 3.35 times of cross directional stretchs, 230 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Embodiment 2
Prescription:
Polyethylene terephthalate (IV 0.62dL/g) 20Kg
Ethylene bis stearamide 2g
Silicon-dioxide 0.56g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, organic additive ethylene bis stearamide 2g, the inorganic additives silicon-dioxide 0.56g of 0.62dL/g joins in the blender, after mixing, 180 ℃ of dryings; Dry slicedly melt extrude under 260 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 25 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 4.0 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 100 ℃ of following preheatings, 3.35 times of cross directional stretchs, 210 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Embodiment 3
Prescription:
Polyethylene terephthalate (IV 0.73dL/g) 20Kg
Ethylene bis stearamide 40g
Silicon-dioxide 0.6g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, organic additive ethylene bis stearamide 40g, the inorganic additives silicon-dioxide 0.6g of 0.73dL/g joins in the blender, after mixing, 140 ℃ of dryings; Dry slicedly melt extrude under 290 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 15 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.7 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 95 ℃ of following preheatings, 4.0 times of cross directional stretchs, 250 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Embodiment 4
Prescription:
Polyethylene terephthalate (IV 0.85dL/g) 20Kg
Ethylene bis stearamide 80g
Silicon-dioxide 0.6g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, organic additive ethylene bis stearamide 80g, the inorganic additives silicon-dioxide 0.6g of 0.85dL/g joins in the blender, after mixing, 160 ℃ of dryings; Dry slicedly melt extrude under 270 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 30 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.0 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 100 ℃ of following preheatings, 3.30 times of cross directional stretchs, 250 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Embodiment 5
Prescription:
Polyethylene terephthalate (IV 0.85dL/g) 20Kg
Ethylene bis stearamide 300g
Silicon-dioxide 0.6g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, organic additive ethylene bis stearamide 300g, the inorganic additives silicon-dioxide 0.6g of 0.85dL/g joins in the blender, after mixing, 170 ℃ of dryings; Dry slicedly melt extrude under 290 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 25 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.30 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 100 ℃ of following preheatings, 3.0 times of cross directional stretchs, 220 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Embodiment 6
Prescription:
Polyethylene terephthalate (IV 0.85dL/g) 20Kg
The bimonthly osmanthus of ethylene acid amides 300g
Silicon-dioxide 0.6g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, the bimonthly osmanthus of organic additive ethylene acid amides 300g, the inorganic additives silicon-dioxide 0.6g of 0.85dL/g joins in the blender, after mixing, 150 ℃ of dryings; Dry slicedly melt extrude under 290 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 25 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.30 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 100 ℃ of following preheatings, 3.40 times of cross directional stretchs, 210 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Embodiment 7
Prescription:
Polyethylene terephthalate (IV 0.85dL/g) 20Kg
The bimonthly osmanthus of ethylene acid amides 300g
Titanium dioxide 0.6g
Operation:
With limiting viscosity is that polyethylene terephthalate polyester slice 20Kg, the bimonthly osmanthus of organic additive ethylene acid amides 300g, the inorganic additives titanium dioxide 0.6g of 0.85dL/g joins in the blender, after mixing, 150 ℃ of dryings; Dry slicedly melt extrude under 280 ℃ temperature through forcing machine, polyester fondant flows out to through die head on 30 ℃ the slab roller and is cooled to sheet fast; Sheet enters longitudinal stretching machine, and after preheat roll preheating, Infrared heaters heating, longitudinal stretching is 3.30 times under the condition that is higher than the polyester second-order transition temperature, then cooling fast; Vertical pulling-on piece enters the cross directional stretch machine, through the preheating zone after 110 ℃ of following preheatings, 3.45 times of cross directional stretchs, 250 ℃ of following heat setting types, cooling is after side cut, thickness measuring, rolling obtain polyester film.Test performance sees Table one.
Table one
| Embodiment | Thickness μ m | Tensile strength MPa | Elongation at break (%) | Haze value (%) | Surface tension dyne/cm | ||
| ?????MD | ?????TD | ?????MD | ?????TD | ||||
| ????1 | ????55 | ????175.7 | ????203.6 | ????107.2 | ????102.4 | ????0.37 | ????44 |
| ????2 | ????75 | ????181 | ????214 | ????93 | ????98 | ????0.80 | ????44 |
| ????3 | ????75 | ????189 | ????209.5 | ????108.2 | ????97.72 | ????0.80 | ????42 |
| ????4 | ????75 | ????216 | ????223 | ????129 | ????99 | ????0.79 | ????36 |
| ????5 | ????75 | ????205 | ????217 | ????106 | ????102 | ????0.85 | ????30 |
| ????6 | ????75 | ????215 | ????203 | ????103 | ????102 | ????0.85 | ????30 |
| ????7 | ????75 | ????210 | ????210 | ????l05 | ????100 | ????1.12 | ????30 |
The surface tension test:
Use the test of SOFTAL surface tension test fluid.Dip in the surface tension test fluid of getting known numeric value with hairbrush and be coated on the polyester film surface, with 2 second liquid film do not break and be as the criterion.
Tensile strength, elongation at break test:
It is fixed to press the GB/T12683-1990 test.
The mist degree test:
Use the WTG-S transmittance/mist degree instrument of Shanghai Physics Optics Instrument Factory to test.
Thickness measuring:
Use the LG-1 vertical optical meter of Shanghai Optical Instrument Factory No.2 to test.
Beneficial effect:
Can be found out by data in the table, the haze value of the polyester film that employing the present invention obtains is little, be that polyester film is transparent, smooth, Heat stability is good, mechanical strength is high, and surface property is good, has good optical property, release property is good simultaneously, can satisfy high temperature and shift field and other requirements to the higher field of Film Optics performance requirement.
Claims (11)
1. a polyester film is made up of polyester slice, organic additive, inorganic additives, and its each components contents (weight percent) is:
Polyester slice 98～100%
Organic additive 0～2.0%
Inorganic additives 0～0.01%
2. polyester film according to claim 1 is characterized in that, wherein said each components contents (weight percent) is:
Polyester slice 98.5～99.99%
Organic additive 0.01～1.5%
Inorganic additives 0～0.003%
3. polyester film according to claim 1 and 2 is characterized in that, wherein said polyester slice is that limiting viscosity is the terephthalic acid of 0.62dL/g～0.85dL/g and the polycondensate of ethylene glycol.
4. polyester film according to claim 1 and 2 is characterized in that, wherein said organic additive is the amides organic additive.
5. polyester film according to claim 4 is characterized in that, wherein said organic additive is ethylene bimonthly osmanthus acid amides or ethylene bis stearamide.
6. polyester film according to claim 1 and 2 is characterized in that, wherein said inorganic additives is silicon-dioxide, kaolin, lime carbonate or titanium dioxide.
7. polyester film according to claim 6 is characterized in that wherein said inorganic additives is a silicon-dioxide.
8. the preparation method of claim 1 or 2 described polyester films is characterized in that its preparation method may further comprise the steps:
1) with polyester slice, organic additive, inorganic additives mixing, drying;
2) melt extrude dry sliced, melt is cooled to sheet on slab roller;
3) with after the sheet preheating that is cooled to, 3.0～4.0 times of longitudinal stretchings;
4) with after the diaphragm preheating behind the longitudinal stretching, 3.0～4.0 times of cross directional stretchs;
5) the film heat setting type after will stretching, rolling after cooling obtains polyester film.
9. the preparation method of polyester film according to claim 8 is characterized in that, wherein said drying temperature is 140 ℃～180 ℃.
10. the preparation method of polyester film according to claim 8 is characterized in that, the wherein said dry sliced temperature that melt extrudes is 260 ℃～290 ℃.
11. the preparation method of polyester film according to claim 8 is characterized in that, wherein said film heat setting temperature is 210 ℃～250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410039195 CN1660935A (en) | 2004-02-24 | 2004-02-24 | Polyester film and producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410039195 CN1660935A (en) | 2004-02-24 | 2004-02-24 | Polyester film and producing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1660935A true CN1660935A (en) | 2005-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410039195 Pending CN1660935A (en) | 2004-02-24 | 2004-02-24 | Polyester film and producing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN1660935A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298203B (en) * | 2008-07-02 | 2011-09-07 | 中国乐凯胶片集团公司 | Transparent smooth polyester film and production method thereof |
| CN102218881A (en) * | 2011-03-29 | 2011-10-19 | 奥瑞金包装股份有限公司 | Low surface energy polyester film and preparation method and application thereof |
| CN102241177A (en) * | 2011-03-29 | 2011-11-16 | 奥瑞金包装股份有限公司 | Colorful polyester film and preparation method thereof |
| CN103483782A (en) * | 2013-09-03 | 2014-01-01 | 陈曦 | Multipurpose polyester film and preparation method thereof |
| CN107215054A (en) * | 2017-05-17 | 2017-09-29 | 纳琳威纳米科技（上海）有限公司 | A kind of method that three-layer co-extruded stretching prepares the wear-resisting and high ultraviolet-resistant optical thin film of hardening |
| CN113561442A (en) * | 2020-04-29 | 2021-10-29 | 上海交通大学 | Preparation method of modified biaxially oriented polyethylene terephthalate film |
| CN115433438A (en) * | 2022-08-19 | 2022-12-06 | 江阴纳力新材料科技有限公司 | Heat-resistant and tensile-strength-enhanced polyester film, preparation method thereof and composite current collector |
-
2004
- 2004-02-24 CN CN 200410039195 patent/CN1660935A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298203B (en) * | 2008-07-02 | 2011-09-07 | 中国乐凯胶片集团公司 | Transparent smooth polyester film and production method thereof |
| CN102218881A (en) * | 2011-03-29 | 2011-10-19 | 奥瑞金包装股份有限公司 | Low surface energy polyester film and preparation method and application thereof |
| CN102241177A (en) * | 2011-03-29 | 2011-11-16 | 奥瑞金包装股份有限公司 | Colorful polyester film and preparation method thereof |
| CN102218881B (en) * | 2011-03-29 | 2014-06-25 | 奥瑞金包装股份有限公司 | Low surface energy polyester film and preparation method and application thereof |
| CN103483782A (en) * | 2013-09-03 | 2014-01-01 | 陈曦 | Multipurpose polyester film and preparation method thereof |
| CN103483782B (en) * | 2013-09-03 | 2014-08-06 | 福建百宏高新材料实业有限公司 | Multipurpose polyester film and preparation method thereof |
| CN107215054A (en) * | 2017-05-17 | 2017-09-29 | 纳琳威纳米科技（上海）有限公司 | A kind of method that three-layer co-extruded stretching prepares the wear-resisting and high ultraviolet-resistant optical thin film of hardening |
| CN113561442A (en) * | 2020-04-29 | 2021-10-29 | 上海交通大学 | Preparation method of modified biaxially oriented polyethylene terephthalate film |
| CN115433438A (en) * | 2022-08-19 | 2022-12-06 | 江阴纳力新材料科技有限公司 | Heat-resistant and tensile-strength-enhanced polyester film, preparation method thereof and composite current collector |
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