CN101851402B - High-transparency thick polyester film - Google Patents
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- CN101851402B CN101851402B CN2010101854330A CN201010185433A CN101851402B CN 101851402 B CN101851402 B CN 101851402B CN 2010101854330 A CN2010101854330 A CN 2010101854330A CN 201010185433 A CN201010185433 A CN 201010185433A CN 101851402 B CN101851402 B CN 101851402B
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Abstract
The invention relates to a high-transparency thick polyester film, the polyester film is obtained by bidirectionally drawing copolyester with low crystallization rate, the thickness of the film is 125 to 500mum, the light transmittance is larger than or equal to 88.0%, the fog density is smaller than or equal to 2.4%, the film contains nanometer-level, sub-nanometer-level and micron-level additives, the micron-level additive accounts for 2 to 50 percent of the gross weight of the additives, and the film has high transparency and good dimensional stability, chemical resistance and processing property and can be widely applied to different industries, particularly a protecting film, a reflecting film, a diffusion film and the like in medium and large flat-plate display screens with higher requirements for optical performance, and films required by films, spray painting, tags and window films.
Description
Technical field
The present invention relates to a kind of polyester film, particularly a kind of high transparent, low haze, thickness are at the high-transparency thick polyester film of 125 μ m～500 μ m.
Background technology
Polyester film is owing to have the mechanical property of excellence, the good high transparent and chemical resistant properties of dimensional stability; Number of applications is in different industries, the protective membrane in the medium-and-large-sized panel display screen that particularly is widely used in optical property is had relatively high expectations, reflectance coating, diffusion barrier etc.The film of these types requires polyester film should have high transparent, low haze, smooth property good, and the requirement of thickness also will be arranged, usually will be between 38 μ m--300 μ m.Can be when producing thicker polyester film; Because the crystallization rate of the polyester that adopts is higher; Make film forming transparency easily and reduce, haze value increases, and makes it to satisfy the requirement of bloomings such as protective membrane in the medium-and-large-sized panel display screen that optical property is had relatively high expectations, reflectance coating, diffusion barrier.
Moreover, because polyester film itself has the characteristic of self-adhesion, for the processing of polyester film is made troubles.For improving the autohension of polyester film; In the production process of polyester film; Often need to add the polyester masterbatch that contains additive particles and cut into slices,, make polyester film reach good operating performance and rolling performance to increase the surface roughness of polyester film as surface slip agent.But the adding of additive; Make that the transparency of polyester film is destroyed to a certain extent; Increased the mist degree of sending out of polyester film, this is undesirable in many Application Areass, is fatal in field of optical applications especially; Increase the turbidity of polyester film, reduced the sharpness of polyester film.
Application number is that 02136917.8 Chinese patent discloses a kind of high transparent polyester film and working method thereof; The thickness that this film relates to is 6～75 μ m; But it is not suitable for thickness at 125 μ m-500 μ m biaxially oriented polyester films, and can't be applied in the field of display that optical property is had relatively high expectations.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of thickness between 125 μ m--500 μ m, have a high-transparency thick polyester film that high transparent, low haze, smooth property are good, be prone to processing.
Addressing the above problem the technical scheme that is adopted is:
A kind of high-transparency thick polyester film; Said polyester film is obtained through two-way stretch by the copolyesters of low crystallization rate; The thickness of said film is 125 μ m～500 μ m, transmittance>=88.0%, mist degree≤2.4%; Contain nano level, Subnano-class and micron-sized additive in the film, the micron order additive accounts for 2～50% of additive gross weight.
Above-mentioned high-transparency thick polyester film; Particle between 0.001 μ m in the said additive～0.02 μ m accounts for 30%～98% of additive gross weight; 0.1 the particle that the particle between μ m～0.50 μ m accounts between 0%～50%, 0.8～3.0 μ m of additive gross weight accounts for 2～50% of additive gross weight.
Above-mentioned high-transparency thick polyester film; The copolyesters of said low crystallization rate is terepthaloyl moietie, polyoxyethylene glycol, Ucar 35,1; The alcohol of one or more in the 4-cyclohexanedimethanol and m-phthalic acid, terephthalic acid, 2, the copolyesters that the sour copolymerization of one or more in the 6-naphthalic acid forms.
Above-mentioned high-transparency thick polyester film, the isophthalic acid comprises diprotic acid molar content in the copolyesters of said low crystallization rate is 0.5mol%～15mol%.
The molar content that above-mentioned high-transparency thick polyester film, the 1.4-cyclohexanedimethanol in the copolyesters of said low crystallization rate account for divalent alcohol is 0.5mol%～12mol%.
Above-mentioned high-transparency thick polyester film, said additive are silicon-dioxide, titanium oxide, aluminium sesquioxide, kaolin, lime carbonate, permanent white, ROHM ester methyl ester or PS.
Polyester film is cut into slices stretched by polyester raw material and is obtained; Among the present invention; In order to produce the polyester film that thickness is 125 μ m～500 μ m, and guarantee transmittance>=88.0% of this thick type film, mist degree≤2.4%; If use the common PET PET Resin/Poyester Chips Bottle Grade; The transmittance of film after casting sheet, stretching reduces greatly, haze value increases substantially owing to its crystallization rate height causes, and makes the optical property of film suffer very big destruction, so film of the present invention adopts the copolyesters that can reduce the PET crystallization rate when producing.
The copolyesters of the reduced PET crystallization rate that adopts in the present invention; Can be terepthaloyl moietie, polyoxyethylene glycol, Ucar 35,1; The divalent alcohol of one or more in the 4-cyclohexanedimethanol and m-phthalic acid, terephthalic acid, 2, the copolyesters that the diprotic acid copolymerization of one or more in the 6-naphthalic acid forms.
At the divalent alcohol that the present invention selected for use, can be alcohol above among a kind of in terepthaloyl moietie, 1.4-cyclohexanedimethanol, polyoxyethylene glycol, the Ucar 35 or two, preferred terepthaloyl moietie and 1.4-cyclohexanedimethanol.Wherein in terepthaloyl moietie and 1.4-cyclohexanedimethanol; The molar content that preferred 1.4-cyclohexanedimethanol accounts for divalent alcohol is 0.5%～12%; When the molar content of 1.4-cyclohexanedimethanol greater than 12% the time; Make that the crystallinity of film is relatively poor, can not keep crystalline texture or structure insecure, thus make film forming poor heat resistance, thermal contraction is bigger than normal.
Among the present invention, the diprotic acid that is adopted can be one or more the diprotic acid in m-phthalic acid, terephthalic acid, the 2.6-naphthalic acid, preferred m-phthalic acid and terephthalic acid.Along with the increase of m-phthalic acid content, the second-order transition temperature of copolyesters can reduce. and cold crystallization temperature can obviously improve, and fusing point reduces.This mainly is owing to introduced m-phthalic acid in the molecular chain, and the regularity of original regular PET macromolecular chain is reduced, and the molecule segment required energy that thaws can reduce, thereby causes second-order transition temperature to reduce.Owing to regularity reduces, molecular chain enters lattice needs more activation energy simultaneously, only ability crystallization under higher temperature, and promptly Tc raises. and the regularity of resulting crystalline texture is poor. and the moisture in the soil value that shows as crystalline texture is higher.The introducing of m-phthalic acid obviously reduces the crystallization rate of copolyesters and spherulite growth rate. but the form and the growth mechanism of spherocrystal do not had tangible influence.Wherein, the molar content of isophthalic acid comprises diprotic acid is 0.5～25%, when m-phthalic acid content greater than 25% the time, make that the crystallinity of film is relatively poor, can not keep crystalline texture or structure insecure.Thereby the poor heat resistance of film, thermal contraction is bigger than normal.When m-phthalic acid content is lower than 0.5%, almost there is not a benzene composition to exist in the copolyesters crystal, do not have the effect that reduces crystallization rate.
The copolyesters of the reduced crystallization rate that the present invention adopted can be the mixture of one or more low crystallization rate copolyesters.For example can be that the independent use of copolyesters that contains the copolyesters of the low crystallization rate of 1.4-cyclohexanedimethanol (CHDM) or contain the low crystallization rate of m-phthalic acid (IPA) also can mix use.Along with the increase of the oligomer content with ring texture and different melting points, the melt crystallization temperature of copolyesters squints to low temperature, and the Tc zone broadens gradually, the increase of hypocrystalline cycle, and crystallization rate reduces.
The fusing point of the copolyesters of low crystallization rate according to the invention is 220 ℃～254.5 ℃, and its cold crystallization temperature is 150 ℃～200 ℃.The thickness that adopts this co-polyester production is 125 μ m--500 μ m, transmittance>=88.0%; When the protective membrane of the thick type film of mist degree≤2.4% in being applied to the medium-and-large-sized panel display screen that optical property is had relatively high expectations, reflectance coating, diffusion barrier etc., need be that film keeps good operating performance and rolling performance.For making this thick type film reach good operating performance and rolling performance; Need to increase the surfaceness of film; The present invention is through adding the surfaceness that additive increases film in film; The mixed additive that said additive is made up of nanometer particle, Subnano-class particle and micro-size particles, wherein, micro-size particles accounts for 2～50% of additive gross weight.
The additive that the present invention adopted can be smooth particles such as silicon-dioxide, permanent white, lime carbonate, organosilicon, PS, polymethylmethacrylate, titanium oxide, aluminium sesquioxide, kaolin.Preferred silicon-dioxide, titanium oxide, aluminium sesquioxide, kaolin, lime carbonate, permanent white, polymethylmethacrylate or PS.
Heavy duty polyester film of the present invention can be a single layer structure, also can be the two layers/multilayered structure that comprises basic unit and top layer.
Among the present invention; In the top layer of single layer structure film, two-layer/multilayered structure film, containing particle diameter is 0.001 μ m～one or more different-grain diameters of 5 μ m, different types of additive particles; Wherein the particle between 0.001 μ m～0.02 μ m accounts for 30%～98% of additive gross weight; 0.1 the particle that the particle between μ m～0.50 μ m accounts between 0%～50%, the 0.8 μ m～3.0 μ m of additive gross weight accounts for 2～50% of additive gross weight.
Among the present invention, the content of additive in the top layer of single layer structure film, two-layer/multilayered structure film is 80ppm～1500ppm, preferred 100ppm～1200ppm.In the basic unit of two-layer/multilayered structure film, all additives are nanometer additive, and content is 10ppm～800ppm, preferred 20ppm～600ppm.
Among the present invention, applying nano additive particles in the basic unit of two-layer/multilayered structure film mainly is because nanoparticle is relatively littler than wavelength of visible light; It does not have the effect of shading; Increased the transmittance of polyester film, improved the polyester film dimensional stability, made the surface of film fine and smooth.But it adds too much, because nano effect, the percent crystallinity of polyester can improve, and this can cause the haze value of thick type film to improve again.In order to control the crystallization rate (transmittance of film and haze value) of thick type film in the course of processing better; Among the present invention when adding the nanometer additive particle; Added the particle (0.1 μ m～0.50 μ m) of Subnano-class additive again, so both can crystallization control speed, again when light passes through; Can block light pass through makes thick type film have high transmittance and sharpness simultaneously.
Heavy duty polyester film according to the invention can prepare through following method:
1. with substrate layer polyester raw material section that mixes and the section of top layer polyester raw material, send into corresponding extrusion system and melt extrude;
2. substrate layer and top layer melt form the unformed polyester casting of multiwalled sheet through co-extrusion die head on the cooling roller that rotates;
3. with after the cooled sheet preheating, 3.0～4.0 times of longitudinal stretchings;
4. with after the diaphragm preheating behind the longitudinal stretching, 3.0～4.5 times of cross directional stretchs;
5. the film heat setting type after will stretching, rolling after cooling obtains thick type high transparent polyester film.
The melt extruding temperature and can be 240 ℃～300 ℃ of above-mentioned preparing method's PET Resin/Poyester Chips Bottle Grade, heat setting temperature can be 160 ℃～240 ℃.
Compared with prior art; Heavy duty polyester film provided by the invention, thickness are 150 μ m--500 μ m, high (transmittance>=88.5% of transparency; Mist degree≤2.4%); Have good dimensional stability, chemical resistant properties and good processibility, can be widely used in different industries, the film that the protective membrane in the medium-and-large-sized panel display screen of particularly optical property being had relatively high expectations, reflectance coating, diffusion barrier etc. and film, air brushing, label, fenestrated membrane require.
Embodiment
Below in conjunction with specific embodiment the present invention is seen for details description, but the present invention is not limited to this.
Embodiment 1
The polyester master particle section that the copolyesters that will contain 1.8% m-phthalic acid (accounting for the molar content of acid in synthetic) and median size are 0.007 μ m silicon-dioxide slipping agent, the polyester master particle section that median size is 0.110 μ m silicon-dioxide and median size are that 0.250 μ m silicon-dioxide polyester master particle is cut into slices and carried out uniform mixing; Finally making median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of 0.007 μ m silica comprises is 60PPm; Median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of 0.110 μ m silica comprises is 10PPm, and median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of 0.250 μ m silica comprises is 10PPm.After these four kinds of raw materials mix are finished, at 160 ℃ of crystallizing and dryings, then material is sent into single screw extrusion machine, under 275 ℃ condition, melt extrude as the raw material of sandwich layer (B layer).
The copolyesters that will contain 1.8% m-phthalic acid (accounting for the molar content of acid in synthetic); With median size be that the polyester master particle section of 0.007 μ m silicon-dioxide slipping agent, polyester master particle section and the median size that median size is 0.110 μ m silicon-dioxide are the section of 0.250 μ m silicon-dioxide polyester master particle and contain polyester master particle section the carrying out uniform mixing that median size is 2.5 μ m silicon-dioxide; Finally making median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of 0.007 μ m silica comprises is 800PPm; Median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of 0.110 μ m silica comprises is 100PPm, and median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of 0.250 μ m silica comprises is 30PPm.Median size is that the content of the total PET Resin/Poyester Chips Bottle Grade of the silica comprises of 2.5 μ m is 50PPm; After these five kinds of raw materials mix are finished; At 160 ℃ of crystallizing and dryings, then material is sent into single screw extrusion machine as the raw material of top layer (A layer), under 275 ℃ condition, melt extrude.
Above-mentioned two kinds of molten materials through a co-extrusion die head, on the cooling roller with the rotation of melt curtain coating to, are become the three-decker sheet of unformed A/B/A.
This sheet is preheating to 110 ℃, indulges subsequently and draw 3.3 times, the vertical thick sheet film of tensile; Deliver in the cross directional stretch machine, under 120 ℃ of conditions, 3.8 times of sheet film cross directional stretchs; Will be after heat setting type under 215 ℃ the temperature; 150 ℃ lax after, process the film that thickness is A/B/A structure 125 μ m, the thickness ratio of its A/B/A is 20/60/20.
Embodiment 2～15
With the preparation method of similar embodiment 1, according to the layer structure and the thickness ratio of film described in the table 1, the formation of A, B polyester composition, the composition of additive, size and content are prepared the thick type high transparent polyester film of different thickness.
Comparative example 1
Is that the polyester masterbatch section of 0.080 μ m silica additive mixes with pure PET PET Resin/Poyester Chips Bottle Grade with containing median size; Make the content of 0.080 μ m silicon-dioxide account for amount of polyester 110ppm; With this material is sandwich layer (B layer) raw material; Behind 170 ℃ of crystallizing and dryings, material is sent into single screw extrusion machine under 280 ℃ condition, melt extrude.
With pure PET PET Resin/Poyester Chips Bottle Grade with contain the polyester masterbatch section that median size is 0.080 μ m silicon-dioxide slipping agent; And median size is that the PET Resin/Poyester Chips Bottle Grade of 3.0 μ m silicon-dioxide mixes; Finally make 0.080 μ m dioxide-containing silica account for PET Resin/Poyester Chips Bottle Grade content 600PPm; 3.0 μ m dioxide-containing silica accounts for amount of polyester section 150PPm, is that top layer (A layer) is sent to twin screw extruder with compound, under 280 ℃ condition, melt extrudes.
Above-mentioned two kinds of molten materials are got to know through co-extrusion; On the cooling roller with the rotation of melt curtain coating to; Become the sheet of the three-layer co-extruded structure of unformed A/B/A; Sheet adopts with embodiment one similar ME and prepares, and processes the thick film that thickness is 150 μ m, and the thickness proportion of its A/B/A structural membrane is 18/64/18.
Comparative example 2
With the preparation method who is similar to comparative example 1; According to structure, the thickness of film described in the table 1, the formation of A, B polyester composition, and composition, size and the content of additive; Prepare the thick film that thickness is 250 μ m, its A/B/A thickness of structure ratio is 12/76/12.
Comparative example 3
With the preparation method who is similar to comparative example 1; According to structure, the thickness of film described in the table 1, the formation of A, B polyester composition, and composition, size and the content of additive; Prepare the thick film that thickness is 450 μ m, its A/B/A thickness of structure ratio is 7/86/7.
In the table 1:
1. the test of melting point polyester and second-order transition temperature: adopt the GB/T14190-2008 method of testing.
2. the test of frictional coefficient: the testing method that adopts ASTM D1894.
3. the test of thickness: the testing method that adopts ASTM D374.
4. the test of mist degree, transmittance, sharpness: the testing method that adopts ASTM D1003.
Table 1:
Table 1 (continuing):
In the table: resin kind: PET: polyethylene terephthalate.
Copolyesters: IPA: m-phthalic acid.
Copolyesters: CHDM: cyclohexylenedinitrilotetraacetic acid dimethanol.
Table 2: the performance data contrast of the polyester film that each embodiment provides
Claims (5)
1. high-transparency thick polyester film; It is characterized in that said polyester film is obtained through two-way stretch by the copolyesters of low crystallization rate, the thickness of said film is 125 μ m～500 μ m; Transmittance>=88.0%; Mist degree≤2.4% contains nano level, Subnano-class and micron-sized additive in the film, the micron order additive accounts for 2～50% of additive gross weight; Said Subnano-class additive is the particle between 0.1 μ m～0.50 μ m;
The copolyesters of said low crystallization rate is terepthaloyl moietie, polyoxyethylene glycol, Ucar 35,1; The alcohol of one or more in the 4-cyclohexanedimethanol and m-phthalic acid, terephthalic acid, 2, the copolyesters that the sour copolymerization of one or more in the 6-naphthalic acid forms.
2. according to the said polyester film of claim 1; It is characterized in that; Particle between 0.001 μ m in the said additive～0.02 μ m accounts for 30%～98% of additive gross weight; 0.1 the particle that the particle between μ m～0.50 μ m accounts between 0%～50%, 0.8～3.0 μ m of additive gross weight accounts for 2～50% of additive gross weight.
3. according to claim 1 or 2 said polyester films, it is characterized in that: the isophthalic acid comprises diprotic acid molar content in the copolyesters of said low crystallization rate is 0.5mol%～15mol%.
4. according to the said polyester film of claim 3, it is characterized in that: the molar content that the 1,4 cyclohexane dimethanol in the copolyesters of said low crystallization rate accounts for divalent alcohol is 0.5mol%～12mol%.
5. according to the said polyester film of claim 4, it is characterized in that: said additive is silicon-dioxide, titanium oxide, aluminium sesquioxide, kaolin, lime carbonate, permanent white, polymethyl acrylate or PS.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101854330A CN101851402B (en) | 2010-05-28 | 2010-05-28 | High-transparency thick polyester film |
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| CN2010101854330A CN101851402B (en) | 2010-05-28 | 2010-05-28 | High-transparency thick polyester film |
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| CN101851402B true CN101851402B (en) | 2012-06-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677188A (en) * | 1985-06-21 | 1987-06-30 | Diafoil Company, Limited | Transparent slippery biaxially stretched polyester film |
| US5475046A (en) * | 1994-01-20 | 1995-12-12 | Cheil Synthetics Inc. | Method for the production of highly transparent polyester film |
| US5569532A (en) * | 1993-09-14 | 1996-10-29 | Skc Limited | Biaxially oriented polyester film and process for the preparation thereof |
| CN1482174A (en) * | 2002-09-10 | 2004-03-17 | 上海紫东化工塑料有限公司 | High transparent polyester film and process for producing the same |
| CN101284435A (en) * | 2008-06-11 | 2008-10-15 | 中国乐凯胶片集团公司 | Transparent polyester film and preparation method thereof |
-
2010
- 2010-05-28 CN CN2010101854330A patent/CN101851402B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677188A (en) * | 1985-06-21 | 1987-06-30 | Diafoil Company, Limited | Transparent slippery biaxially stretched polyester film |
| US5569532A (en) * | 1993-09-14 | 1996-10-29 | Skc Limited | Biaxially oriented polyester film and process for the preparation thereof |
| US5475046A (en) * | 1994-01-20 | 1995-12-12 | Cheil Synthetics Inc. | Method for the production of highly transparent polyester film |
| CN1482174A (en) * | 2002-09-10 | 2004-03-17 | 上海紫东化工塑料有限公司 | High transparent polyester film and process for producing the same |
| CN101284435A (en) * | 2008-06-11 | 2008-10-15 | 中国乐凯胶片集团公司 | Transparent polyester film and preparation method thereof |
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