CN101318393A - Electrostatic resistant heavy duty polyester film and method of preparing the same - Google Patents
Electrostatic resistant heavy duty polyester film and method of preparing the same Download PDFInfo
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- CN101318393A CN101318393A CNA2008101242977A CN200810124297A CN101318393A CN 101318393 A CN101318393 A CN 101318393A CN A2008101242977 A CNA2008101242977 A CN A2008101242977A CN 200810124297 A CN200810124297 A CN 200810124297A CN 101318393 A CN101318393 A CN 101318393A
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Abstract
The invention relates to an anti-static thick type polyester film which includes three layers of coextruded films. Calculated by the weight percentage, the film of a core layer is provided with 97 to 99.5 percent of polyester chips and 0.5 to 3 percent of an antistatic agent; the film of a surface layer is provided with 90 to 96 percent of the polyester chips and 4 to 10 percent of the antistatic agent; the thickness of the film of the core layer is between 0.075 to 0.31mm; the thicknesses of the films of the two surface layers are equal; besides, the thickness of the film of the surface layer is between 0.006 to 0.02mm. The invention adopts the anti-static polyester film of ABA three-layer structure to modify the conductive performance of a polyester substrate; especially, the film of the surface layer has high concentration of the antistatic agent and the antistatic agent added in the polyester substrate is capable of partially moving to the surface of the film; the anti-static thick type polyester film has the advantages of scrub resistance and solvent resistance, thus leading the polyester film to have the anti-static function for a long period.
Description
Technical field
The present invention relates to a kind of electrostatic resistant heavy duty polyester film and production method thereof, belong to field of thin film fabrication.
Background technology
Rapid use along with flourish and synthetic resin, fiber or the film of electron trade, information communication, problem by generation of static electricity is on the rise, in production, use, produce static in order effectively to control electronic product, must have certain antistatic behaviour as the polyester fractal film that uses in mobile phone, the computer, this can prevent the static that produces and damage electronic devices and components in stripping process.The antistatic behaviour of film is exactly the character that the static that is accumulated in the insulation film surface is discharged by suitable method, can not influence its original antistatic behaviour along with the prolongation of standing time.Therefore give the polyester film antistatic behaviour and avoid electronics, electric and communication apparatus produced that to destroy be very important.
CN1974637A discloses the production method of a kind of " anti-static polyester film ", adopts the method for coating that antistatic additive is coated on the conventional polyester film, thereby reaches anlistatig order, and the thickness of this polyester film is 0.05mm-0.3mm.CN1990524A discloses the production method of a kind of " anti-static polyester film ", adopts online coating method with antistatic and be coated on the conventional polyester film, thereby reaches anlistatig purpose.But above-mentionedly all have the following disadvantages: (1), antistatic property instability.Because antistatic coating is influenced by ambient temperature bigger, along with the rising of temperature, local variation can take place in coating; Again because of the antistatic behaviour layer is at film surface, antistatic additive is subjected to friction, washing or with after some resolvability solvents contact, all can influences the antistatic property of antistatic layer, and this kind anti-static polyester film can not be brought into play anlistatig effect lastingly.(2) coating can be peeled off with base material.Adopt the coated structure antistatic layer, need anti-electrostatic polymer, adhesive resin, crosslinking agent and solvent etc., therefore the antistatic layer filming performance is had relatively high expectations, the inhomogeneous or improper use as film forming easily causes peeling off of antistatic layer and base material.(3), complex manufacturing technology.Since need online coating, the complexity of the manufacture craft of increase, the probability that goes wrong is bigger, and the quality instability is unfavorable for industrialization continuity production.
Summary of the invention
The invention provides a kind of steady quality, and can keep the electrostatic resistant heavy duty polyester film and the production method thereof of antistatic behaviour.
The present invention is that the technical scheme that achieves the above object is: a kind of electrostatic resistant heavy duty polyester film, it is characterized in that: the three-layer thin-film that comprises co-extrusion, by weight percentage, the sandwich layer film has the polyester slice of 97-99.5% and the antistatic additive of 0.5-3%, described top layer thin layer has the polyester slice of 90-96% and the antistatic additive of 4-10%, the thickness of sandwich layer film is at 0.075～0.31mm, two top layer film uniform thickness, and the top layer film thickness is at 0.006～0.02mm.
The production method of a kind of electrostatic resistant heavy duty polyester film of the present invention is characterized in that: by weight percentage,
(1), the polyester slice of 19.4-19.5% after the drying pulverized extrude after high-speed mixing with the antistatic additive of 0.5-3% the back, granulation makes the sandwich layer antistatic master batch, again with after high-speed mixing, extrude again with the sandwich layer antistatic master batch after the polyester slice crushed after being dried of remainder, granulation makes the sandwich layer compound; Equally, the polyester slice of 18-19.2% after the drying pulverized extrude after high-speed mixing with the antistatic additive of 4-10% the back, granulation makes the top layer antistatic master batch, again with extrude after high-speed mixing with the top layer antistatic master batch after the polyester slice crushed after being dried of remainder, granulation makes the top layer compound;
(2), the sandwich layer compound is sent into fusion in the single screw extrusion machine, simultaneously, the top layer compound is sent into fusion in the double screw extruder, the sandwich layer melt is extruded sheet from the intermediate layer of three layers of die head, the top layer melt is extruded sheet simultaneously from the levels of three layers of die head simultaneously, or sandwich layer melt and top layer melt extrude sheet from die head after through three layers of distributor, through casting sheet, biaxial tension, heat setting and rolling, makes electrostatic resistant heavy duty polyester film.
The present invention adopts the anti-static polyester film of ABA three-decker; polyester base material is carried out the electric conductivity modification; especially the top layer film contains the antistatic additive of high concentration; the antistatic additive that is added in the polyester base material can partly move to film surface; have scrub resistance and solvent resistance, make polyester film have long-term antistatic protection effect.Sandwich layer film of the present invention also contains antistatic additive, owing to contain a certain amount of antistatic additive in the sandwich layer, so can effectively prevent the phenomenon of film interior antistatic additive in top layer to the migration of sandwich layer film, makes polyester film keep lasting antistatic behaviour.The present invention is because the sandwich layer film thickness is more than 10 times of top layer film thickness, so kept the physical and mechanical properties of polyester film.The present invention is mixed and made into sandwich layer antistatic master batch and top layer antistatic master batch with part polyester slice and antistatic additive earlier, again antistatic master batch and top layer antistatic master batch are mixed with the polyester slice of separately content respectively, antistatic additive can evenly be blended in the polyester base material more, especially extrude the top layer melt by a double screw extruder, therefore can overcome preferably owing to extrusion pressure between the extruder, the difference of temperature causes the difference problem of melt viscosity between two top layers, strengthened the flowability between thin layer and the layer, make the film thickness homogeneous, the thin film fabrication steady quality, apparent excellence.The present invention adopts maturation process, can use existing process equipment, and production technology is good, is convenient to suitability for industrialized production.
The present invention adopts polyether-type antistatic additive or ionic anti-static agent, relative humidity dependence to air is little, moreover little to the influence of the surface property of film, especially can under low relatively humidity environment, also have good antistatic effect, so the I of polyester film surface resistivity reaches 4 * 10
9Ω.
The specific embodiment
Electrostatic resistant heavy duty polyester film of the present invention comprises the three-layer thin-film of co-extrusion, and by weight percentage, the sandwich layer film has the polyester slice of 97-99.5% and the antistatic additive of 0.5-3%.The top layer thin layer has the polyester slice of 90-96% and the antistatic additive of 4-10%, and the thickness of sandwich layer film is at 0.075～0.31mm, two top layer film uniform thickness, and the top layer film thickness is at 0.006～0.02mm.
Polyester slice of the present invention adopts bottle level or film grade polyester chip, and antistatic additive is selected the polyether-type antistatic additive for use, as comprise the APEO system of polyamide or polyesteramide: polyether ester amides, polyetheramides acid imide etc., or methoxy polyethylene glycol methacrylate-styrene polymer copolymer: polyethylene glycol oxide, epihalohydrin copolymer etc.This antistatic additive also can adopt ionic anti-static agent, as quaternary, and tetraalkylammonium salt, trialkyl alkylbenzene ammonium salt etc., or Sulfonates antistatic additive, as alkylsulfonate, alkylbenzenesulfonate, alkylbenzene diphenyl ether disulfonate etc.
The production method of anti-static polyester film of the present invention, by weight percentage, the polyester slice of 19.4-19.5% after the drying pulverized extrude after high-speed mixing with the antistatic additive of 0.5-3% the back, granulation makes the sandwich layer antistatic master batch, again with after high-speed mixing, extrude again with the sandwich layer antistatic master batch after the polyester slice crushed after being dried of remainder, granulation makes the sandwich layer compound; Equally, the polyester slice of 18-19.2% after the drying pulverized extrude after high-speed mixing with the antistatic additive of 4-10% the back, granulation makes the top layer antistatic master batch, again with extrude after high-speed mixing with the top layer antistatic master batch after the polyester slice crushed after being dried of remainder, granulation makes the top layer compound.
The sandwich layer compound is sent into fusion in the single screw extrusion machine, simultaneously, the top layer compound is sent into fusion in the double screw extruder, this double screw extruder has nature exhaust and pumped vacuum systems, the sandwich layer melt is extruded sheet from the intermediate layer of three layers of die head, the top layer melt is extruded sheet simultaneously from the levels of three layers of die head simultaneously, and the thickness of intermediate layer sheet is by the rotating speed control of slab roller, and the thickness of two top layer sheets is controlled by amount of compression up and down.Also sandwich layer melt and top layer melt are extruded sheet from a die head after through three layers of distributor in the present invention, die head temperature is controlled at 280-295 ℃, linear velocity when sheet is extruded is controlled at 0.1-0.3m/s, the slab roller and the cold wind that are lower than 35 ℃ of temperature water with feeding cool off the casting sheet to sheet, sheet is carried out longitudinal stretching earlier, be the direction of motion of film, roller by 60-80 ℃ of temperature carries out preheating earlier, enter 110-150 ℃ infrared heater heating, and in the linear velocity of 0.2m/s-1.1m/s, 2.0-3.5: carry out longitudinal stretching under 1 the vertical stretching ratio, stretching time is less than 0.5s.And then carry out cross directional stretch, promptly vertical direction with film movement, it is interior to carry out preheating under 100-150 ℃ the temperature to send into heating cabinet, and the time is controlled at 10-60s, again at 110-160 ℃ temperature, 3.0-5.0: carry out cross directional stretch under 1 the horizontal stretching ratio, the time is controlled at 10s-60s.Carry out heat setting then and handle under 190-230 ℃ condition, the processing time is 10s-60s, and rolling makes electrostatic resistant heavy duty polyester film, and overall film thickness is at 75 μ m-350 μ m, and the top layer film is thick to be 6 μ m-20 μ m.
The invention electrostatic resistant heavy duty polyester film, polyester slice in its sandwich layer film and the concrete weight percent of antistatic additive, and the polyester slice in the film of top layer and the concrete weight percent of antistatic additive see Table the embodiment in 1, as stated above batch mixing, extrude sheet, casting sheet, biaxial tension, heat setting and rolling and make heavy duty polyester film, make the polyester film gross thickness at 75 μ m-350 μ m, skin depth is 6 μ m-20 μ m, polyester film surface resistivity 2.0 * 10
10-4.0 * 10
9Ω, polyester film mist degree 2.1-4.5%, polyester film hot strength 160/170-185/200MD/TD (Mpa).
Table 1
Claims (4)
1, a kind of electrostatic resistant heavy duty polyester film, it is characterized in that: the three-layer thin-film that comprises co-extrusion, by weight percentage, the sandwich layer film has the polyester slice of 97-99.5% and the antistatic additive of 0.5-3%, described top layer thin layer has the polyester slice of 90-96% and the antistatic additive of 4-10%, the thickness of sandwich layer film is at 0.075～0.31mm, two top layer film uniform thickness, and the top layer film thickness is at 0.006～0.02mm.
2, electrostatic resistant heavy duty polyester film according to claim 1 is characterized in that: described antistatic additive is the polyether-type antistatic additive.
3, electrostatic resistant heavy duty polyester film according to claim 1 is characterized in that: described antistatic additive is an ionic anti-static agent.
4, a kind of production method of electrostatic resistant heavy duty polyester film is characterized in that: by weight percentage,
(1), the polyester slice of 19.4-19.5% after the drying pulverized extrude after high-speed mixing with the antistatic additive of 0.5-3% the back, granulation makes the sandwich layer antistatic master batch, again with after high-speed mixing, extrude again with the sandwich layer antistatic master batch after the polyester slice drying and crushing of remainder, granulation makes the sandwich layer compound; Equally, the polyester slice of 18-19.2% after the drying pulverized extrude after high-speed mixing with the antistatic additive of 4-10% the back, granulation makes the top layer antistatic master batch, again with extrude after high-speed mixing with the top layer antistatic master batch after the polyester slice drying and crushing of remainder, granulation makes the top layer compound;
(2), the sandwich layer compound is sent into fusion in the single screw extrusion machine, simultaneously, the top layer compound is sent into fusion in the double screw extruder, the sandwich layer melt is extruded sheet from the intermediate layer of three layers of die head, the top layer melt is extruded sheet simultaneously from the levels of three layers of die head simultaneously, or sandwich layer melt and top layer melt extrude sheet from die head after through three layers of distributor, through casting sheet, biaxial tension, heat setting and rolling, makes electrostatic resistant heavy duty polyester film.
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| CN2008101242977A CN101318393B (en) | 2008-07-08 | 2008-07-08 | Antistatic thick polyester film and production method thereof |
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| CN2008101242977A CN101318393B (en) | 2008-07-08 | 2008-07-08 | Antistatic thick polyester film and production method thereof |
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| CN101318393B CN101318393B (en) | 2011-11-23 |
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| CN101942727A (en) * | 2010-07-09 | 2011-01-12 | 江苏裕兴薄膜科技股份有限公司 | Polyester film harness wire and preparation method thereof |
| CN102096129A (en) * | 2011-01-30 | 2011-06-15 | 宁波东旭成化学有限公司 | Three-layer compound antistatic high-performance optical diffusion membrane and preparation method thereof |
| CN102582177A (en) * | 2012-02-22 | 2012-07-18 | 常州市改性塑料厂有限公司 | Layered antistatic plate and forming method thereof |
| CN103042768A (en) * | 2012-12-28 | 2013-04-17 | 苏州天华超净科技股份有限公司 | Low-humidity antistatic film and application thereof |
| CN103738033A (en) * | 2013-10-18 | 2014-04-23 | 杭州大东南高科包装有限公司 | Bidirectional stretching polyester thin film and preparation method thereof |
| CN103818070A (en) * | 2013-12-13 | 2014-05-28 | 合肥乐凯科技产业有限公司 | White polyester film and preparation method thereof |
| CN106166880A (en) * | 2016-06-28 | 2016-11-30 | 嘉兴市高正高分子材料有限公司 | A kind of anti-static polycarbonate film |
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| CN108145988A (en) * | 2017-12-20 | 2018-06-12 | 江苏斯瑞达新材料科技有限公司 | The production method of the antistatic scratch resistant polyester film of display screen |
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| CN102096129B (en) * | 2011-01-30 | 2012-09-26 | 宁波东旭成化学有限公司 | Three-layer compound antistatic high-performance optical diffusion membrane and preparation method thereof |
| CN102096129A (en) * | 2011-01-30 | 2011-06-15 | 宁波东旭成化学有限公司 | Three-layer compound antistatic high-performance optical diffusion membrane and preparation method thereof |
| CN102582177B (en) * | 2012-02-22 | 2014-09-10 | 常州市改性塑料厂有限公司 | Layered antistatic plate and forming method thereof |
| CN102582177A (en) * | 2012-02-22 | 2012-07-18 | 常州市改性塑料厂有限公司 | Layered antistatic plate and forming method thereof |
| CN103042768A (en) * | 2012-12-28 | 2013-04-17 | 苏州天华超净科技股份有限公司 | Low-humidity antistatic film and application thereof |
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| CN103818070B (en) * | 2013-12-13 | 2017-02-15 | 合肥乐凯科技产业有限公司 | White polyester film and preparation method thereof |
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| CN108145988A (en) * | 2017-12-20 | 2018-06-12 | 江苏斯瑞达新材料科技有限公司 | The production method of the antistatic scratch resistant polyester film of display screen |
| CN111497173A (en) * | 2020-04-29 | 2020-08-07 | 江苏裕兴薄膜科技股份有限公司 | Method for preparing liquid crystal polymer film |
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