CN102303443B - Ultrathin polyester film and preparation method thereof - Google Patents
Ultrathin polyester film and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a polyester film and a preparation method thereof, and in particular relates to an ultrathin polyester film and a preparation method thereof. In order to solve the defect in the process that solid particles are added in the film to improve adhesion resistance of the film in the prior art, the invention provides an ultrathin polyester film which comprises a polyester film base material with a thickness of 4-6mu m, adhesion-resistant particles are adhered on the outer surface of the polyester film base material through waterborne resins, and friction coefficients (dynamic and static friction coefficients) of the surface of the film are 0.2-0.6. The invention also provides the preparation method of the ultrathin polyester film. The ultrathin polyester film provided by the invention has excellent physical and mechanical properties and adhesion resistance. The preparation method of the ultrathin polyester film has the advantages of simple process, easiness in operation and lower production cost.
Description
Technical field
The present invention relates to a kind of polyester film and preparation method thereof, relate in particular to a kind of ultra thin type polyester film and preparation method thereof.
Background technology
Biaxially oriented polyester film is owing to having good mechanical performance, heat resistance, chemical-resistance and dielectric properties, can be as the insulating materials of electrical equipment and the insulating materials (claiming again dielectric medium) of capacitor, the electric capacity of the capacitor of making of polyester film is high, volume is little, and dependability is high.At all suitable insulating materials as capacitor, among polypropylene, poly p phenylene sulfide, polystyrene, Merlon, polyimides, these materials of polyester, polyester material becomes the most potential capacitor insulating materials with its superior cost performance.
Along with basic unit and the microminiaturization of projection and the fast development, particularly components and parts of information industry, be used for the microminiaturized future development of capacitor forward of these industries, the demand of the polyester film of therefore ultrathin (thickness is less than 6 μ m) is in continuous increase.From the development trend of capacitor the thinnest film used, be that 5 μ m are thick the seventies, and be that 2 μ m are thick the eighties, and the thinnest film that can produce at present is 0.9 μ m thick (Dong Li company produce), and it is thick that Du Pont's patent Introduction even can reach 0.2 μ m.
Preparation thickness is called polyester film ultrathin technology less than the polyester film technology of 6 μ m, and the production technology that is different from the general thickness polyester film is arranged.In common polyester film was produced, in order to adapt to the requirement of machinability, polyester surface must contain a small amount of fine solid particles, used to play anti-stick continuous cropping when the film unwinding and rewinding.Traditional way is first particle to be added to make masterbatch section (particle diameter is between 2-4 μ m) in polyester raw material, the mode of then adding by masterbatch is added solids in whole film (individual layer is extruded) (as shown in Figure 1, being added with the anti-stick particle 2 that connects in existing film) or film top layer (the A layer during ABA is three-layer co-extruded) to.Yet, for ultrathin film, because the particle diameter that adds particle is larger with respect to film thickness, not only have influence on membrane technology (as easily causing rupture of membranes), and have influence on the performance (as thickness evenness, profile pattern etc.) of finished film.Although the problems referred to above can solve by the particle diameter that reduces particulate, along with reducing of particle diameter, its resistance to blocking also can reduce greatly.And, along with the continuous reduction of film thickness, also can not one solve straight through the method that reduces particle diameter.
Summary of the invention
In order to solve in prior art, particle diameter by solids being added in whole film to the interpolation particle that exists with this technique of resistance to blocking that improves film is larger with respect to film thickness, easily cause rupture of membranes and affect the thickness evenness of finished film, the defective of profile pattern, the invention provides a kind of ultra thin type polyester film and preparation method thereof.The present invention has avoided adding in the whole polyester film prior art of solids, and ultra thin type polyester film provided by the invention has good physical and mechanical properties and resistance to blocking.Preparation method's technique of ultra thin type polyester film provided by the invention is simple, easy operating, and production cost is lower.
In order to achieve the above object, the present invention adopts following technical proposals:
The 1st, the invention provides a kind of ultra thin type polyester film, comprise the polyester film base material, described polyester film base material thickness is less than 6 μ m, described polyester film base material thickness is preferably 4-6 μ m, and its feature is that described polyester film base material outer surface is bonded with the anti-stick particle that connects by water-base resin.The described anti-stick particle size range that connects particle is 0.2-0.8 μ m, and anti-stick even particle and water-base resin are 0.02-0.2g/m at the consumption of film surface
2Described water-base resin and the anti-stick particle that connects are preferably formed tack coat, and the thickness of this tack coat is preferably 0.1-0.5 μ m.The coefficient of friction on described ultra thin type polyester film surface (dynamic and static coefficient of friction) is 0.2-0.6.The performance indications of ultra thin type polyester film provided by the invention are referring to table 9.
The 2nd, the invention provides a kind of as ultra thin type polyester film as described in the 1st, its feature is that described polyester film base material polyester raw material used comprises PETG (PET), polybutylene terephthalate (PBT) (PBT), PEN (PEN) or its co-polymerization modified polyester; Be preferably PET or PEN.The inherent viscosity of described polyester raw material is: 0.55-0.70dl/g, glass transition temperature General Requirements are greater than 65 ℃, and more preferably greater than 70 ℃, the fusing point General Requirements is greater than 250 ℃, and more preferably greater than 260 ℃, other performance indications meet relevant national standard.Described water-base resin uses as adhesive, the general employing of described water-base resin can the water-soluble polymer substance that maybe can be scattered in water, mainly comprise water-soluble polyacrylate, soluble polyurethane, water soluble sulfonated polyester, with the polyester film base material, certain adhesive effect is arranged after these resin material dryings.Described anti-stick even particle is inorganic matter.
The 3rd, a kind of as ultra thin type polyester film as described in the 2nd, its feature is, described anti-stick to connect particle be silica dioxide granule.
The 4th, a kind of as ultra thin type polyester film as described in one of the 1st to 3, its feature is, described water-base resin and the anti-stick particle that connects are before being bonded in described polyester film substrate surface, before use namely, first be mixed with coating fluid, be applied to described polyester film substrate surface by coating technique, after drying, the anti-stick particle that connects is bonded in described polyester film substrate surface by water-base resin; (following percentage composition is weight percentage) composed as follows of described coating fluid:
Water-base resin 1.5-8%
Colloid silicon 0.5-2%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution.
Above-mentioned water-base resin and the anti-stick active ingredient that particle is coating technique coating fluid used (or claiming coating material) that connects, water-base resin wherein plays the gluing effect that described colloid silicon is fixed to film surface, after drying, colloid silicon can be condensed into silica dioxide granule.
Described coating fluid before use, coating material (water-base resin and colloid silicon) first mixes and is mixed with the aqueous solution that the solid weight percentage composition is 1-10%, wherein the content of water-base resin (the solid active ingredient in resin aqueous solution) is the 0.9-8%(percentage by weight), the content of colloid silicon (the solid active ingredient in the colloid silicon aqueous solution) is the 0.1-2%(percentage by weight).The consumption of coating material depends on coating process and target capabilities.In general, the resistance to blocking of the higher film surface of content of colloid silicon is just higher, but the coating process relative difficult.
The 5th, a kind of as ultra thin type polyester film as described in the 4th, its feature is, (following percentage composition is weight percentage) composed as follows of described coating fluid:
Water-base resin 1.5-6%
Colloid silicon 0.5-1.5%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution.
The 6th, a kind of as ultra thin type polyester film as described in the 4th, its feature is, (following percentage composition is weight percentage) composed as follows of described coating fluid:
Water-base resin 3-5%
Colloid silicon 0.8-1.2%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution.
The 7th, a kind of preparation method of ultra thin type polyester film, its feature is, described ultra thin type polyester film comprises the polyester film base material, described polyester film base material thickness is 4-6 μ m, described polyester film base material outer surface is bonded with the anti-stick particle that connects by water-base resin, and described ultra thin type polyester film preparation method is as follows:
Described polyester film base material adopts the stretch processes preparation, and described stretch processes comprises: raw material drying, melt extrude, and slab, longitudinal stretching, cross directional stretch, thermal finalization, cooling, traction, winding process; Increased painting process between described longitudinal stretching and cross directional stretch operation, after described longitudinal stretching operation is completed, in described painting process, the coating fluid that will contain described water-base resin and anti-stick company particle is applied to the polyester film substrate surface, the solid matter weight percentage of described coating fluid is 1%-10%, (following percentage composition is weight percentage) composed as follows of described coating fluid:
Water-base resin 1.5-8%
Colloid silicon 0.5-2%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution; Described coating fluid is completed drying at the preheating section of cross directional stretch.
Above-mentioned stretch processes, identical with existing polyester film stretch processes, above-mentioned polyester film, its thickness are no more than 6 μ m, film has a surface or two surfaces to be coated with processing with coating fluid, and need not to add the anti-stick particle that connects in above-mentioned polyester film base material.Described stretch processes parameter is referring to table 8.Suitably adjust the stretch processes of polyester film, can make the polyester film that thickness is 4-6 μ m.
The coefficient of friction (dynamic and static coefficient of friction) on the above-mentioned ultra thin type polyester film surface that the present invention is prepared is generally 0.2-0.6, is 0.3-0.5 under best-case.In addition, prepared polyester film also possesses following key property: hot strength (laterally, vertically) is greater than 180MPa, elongation at break (laterally, vertically) is greater than 90%, heat shrink rate under 150 ℃, 30min laterally less than 1.5%, vertically less than 2.5%, surface resistivity is greater than 1 * 10
15Ω.
The 8th, a kind of preparation method as ultra thin type polyester film as described in the 7th, its feature be, (following percentage composition is weight percentage) composed as follows of described coating fluid:
Water-base resin 1.5-6%
Colloid silicon 0.5-1.5%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution.
The 9th, a kind of preparation method as ultra thin type polyester film as described in the 7th, its feature is, described painting process is synchronizeed with the production of polyester film and is carried out, namely be coated with processing after the film longitudinal stretching, namely enter the cross directional stretch stage after diaphragm has been coated with, coating method is intaglio plate coating or bar type coating.
The 10th, a kind of ultra thin type polyester film as described in the 1-6 item, its feature is that described polyester film is used for the insulating materials of capacitor.
Above-mentioned polyester film base material processing parameter is as shown in table 8, and, can be according to the performance of base material raw material, composition and the consumption of coating fluid, the technological parameter shown in suitable adjustment form.
Preferably, above-mentioned polyester film base material is standby by the biaxial tension legal system, increased painting process between longitudinal stretching in described stretch processes and cross directional stretch, after described painting process is positioned at the longitudinal stretching of above-mentioned stretch processes, before cross directional stretch.Namely be coated with processing after the film longitudinal stretching.After being coated with, film substrate namely enters the cross directional stretch stage.For making coating material (water-base resin and colloid silicon) obtain drying and be bonded in the polyester film substrate surface, need to do corresponding technique adjustment at the horizontal preheating section that draws.In general, can lengthen by preheating section (growing up to four sections as adding by original three sections) or heat (as being increased to 110 ℃ by original 100 ℃) satisfies the dry needs of coating.The treatment process of this rear film is identical with the general thin drawing process.Above-mentioned painting process can be coated with by single face, also can double spread.Coating method can adopt any one in intaglio plate coating (Gravure Roll, or title intaglio plate print roll coating) or bar type coating (Mayer Bar).The intaglio plate coating is to adopt the surface to be carved with the applicator roll of trickle mesh, and coating fluid is transferred on the base material diaphragm by the mesh of applicator roll.The bar type coating is to adopt surface uniform to be wound around the spreading rod (or claiming silk excellent spreader) of finer wire, and coating fluid is transferred on the base material diaphragm by the groove between steel wire.Whether single face is coated with or double spread depending on coating apparatus function, if coating apparatus can be realized while double spread function advise carrying out double spread.In general the film surface resistance to blocking of double spread is more excellent and more stable.If can only be coated with advise improving as much as possible coating weight by single face, to guarantee the enough resistance to blockings in film surface.
Compared with prior art, the invention has the advantages that and need not directly to add the anti-stick particle that connects in the polyester film base material, thereby the original physical and mechanical properties that keeps well polyester film makes the drawing process operation when producing ultrathin film to carry out smoothly.The anti-stick even material that is coated with (anti-stick particle or the particle of connecting) only is attached to the outer surface of film, makes the ultra thin type polyester film of preparation have resistance to blocking preferably.And, anti-stickly connect the size of particle and can be adjusted by adjusting the coating fluid formula in the amount that film surface distributes, thereby the resistance to blocking of film can be adjusted easily.In addition, preparation method's technique of ultra thin type polyester film provided by the invention is simple, easy operating, and production cost is lower.
Description of drawings
Fig. 1 is added with the anti-stick membrane structure schematic diagram that connects particle in existing film;
Fig. 2 is that surface provided by the invention is bonded with the anti-stick ultra thin type polyester film structural representation that connects particle;
Fig. 3 is that a surface provided by the invention is bonded with the anti-stick ultra thin type polyester film generalized section that connects particle;
Fig. 4 is that two surfaces provided by the invention are bonded with the anti-stick ultra thin type polyester film generalized section that connects particle.
In figure, 1 is the biaxially oriented polyester film base material, and 2 is the anti-stick particle that connects of the prior art, and 3 is the anti-stick particle that connects of the present invention, and 4 is water-base resin tack coat of the present invention.
The specific embodiment
As shown in Figure 2, surface provided by the invention is bonded with the anti-stick ultra thin type polyester film that connects particle 3, and in figure, 1 is the biaxially oriented polyester film base material; As shown in Figure 3, a surface provided by the invention is bonded with the anti-stick ultra thin type polyester film that connects particle 3, and in figure, 1 is the biaxially oriented polyester film base material, and 4 is water-base resin tack coat of the present invention; As shown in Figure 4, two surfaces provided by the invention are bonded with the anti-stick ultra thin type polyester film 1 that connects particle 3, and in figure, 1 is the biaxially oriented polyester film base material, and 4 is water-base resin tack coat of the present invention.
More specifically describe technical scheme of the present invention below in conjunction with embodiment, wherein, the polyester film raw materials is generally PETG (PET), polybutylene terephthalate (PBT) (PBT), PEN (PEN) or its co-polymerization modified polyester of selling on market; Water-base resin can be water-soluble polyacrylate, soluble polyurethane, water soluble sulfonated polyester; Colloid silicon is generally the silicon dioxide colloid aqueous solution common on market.Polyester film base material raw material adopts the film grade polyester chip of selling on market.
Percentage composition described in embodiment is weight percentage.The percentage composition of described water-base resin is the percentage composition of active ingredient in aqueous resin solution (water-base resin solid portion); The percentage composition of described colloid silicon is the percentage composition of active ingredient in colloidal silica solution (colloid silicon solid portion), for example, coating fluid is water-base resin and the colloid silicon aqueous solution of 10% solid content, main component: 8% water-base resin, 2% colloid silicon, surplus are pure water.Wherein, 8% water-base resin refers to 8% water-base resin solid, and 2% colloid silicon refers to 2% colloid silicon solid.The metering method of 100 kilograms of above-mentioned coating fluids that exemplify of preparation is as follows: need add the water-base resin solid of 8 kilograms, the colloid silicon solid of 2 kilograms; If the active ingredient of aqueous resin solution (raw material) is 28%: the 8/0.28=28.57 kilogram namely needs to add 28.57 kilograms of aqueous resin solutions; If the active ingredient of colloid silicon solution (raw material) is 34%: the 2/0.34=5.88 kilogram, namely need to add 5.88 kilograms of colloid silicon solution, the pure water of surplus is: the 100-28.57-5.88=65.55 kilogram namely needs to add 65.55 kg of water.
In embodiment, coating fluid raw material used and process for preparation, polyester film base material raw material and preparation technology, gained film surface property and evaluation etc. are following described.
(1) coating fluid raw material and preparation thereof
The aqueous polyurethane that the Dutch DSM NeoResins B.V. of water-base resin use company produces, trade name NeoRez R-610(DSM profit health resin), active constituent content 28%.Colloid silicon uses EKA(according to card) silica sols produced of chemical company, trade name NYACOL2034DI, active constituent content 34%(can directly be bought by the EKA chemical company, also can be provided by GuangZhou, China jade of the He family chemical materials Co., Ltd).
Coating fluid is water-base resin and the colloid silicon aqueous solution of 1-10% solid content, main component: the 0.9-8% water-base resin, and 0.1-2% colloid silicon, surplus is pure water.
Coating fluid preparation process: water and the aqueous resin solution of amount of calculation are mixed evenly, slowly add the colloid silicon aqueous solution of amount of calculation, stir, filter standby.
(2) polyester film raw material and preparation process
The film grade polyester chip that the Chinese Yizheng Fiber Optical plant of polyester film base material raw material employing Co., Ltd produces, trade names FG620.
Above-mentioned polyester film base material raw material carries out the preparation of polyester film on the polyester film stretching production line that Mitsubishi heavy industry company produces.The thin film technology step is as follows: polyester raw material melt extrudes slab after drying, the gained sheet is 4 times of 100 ℃ of lower longitudinal stretchings, use the coating fluid of preparing to carry out two-sided or the single face coating, at horizontal preheating section after 98 ℃ of dryings, laterally stretch 3.8 times under 104 ℃, the polyester film that thickness is 5 μ m is finally made in rolling after 225 ℃ of lower thermal finalizations are processed, be cooling.
(3) the surperficial resistance to blocking of preparation gained polyester film is estimated by the mensuration of coefficient of friction, and the coefficient of friction of the higher correspondence of resistance to blocking is lower.The mensuration foundation of coefficient of friction is GB10006-88 plastic sheeting and thin slice measuring friction coefficient method.
(4) the anti-stick particle diameter that connects particle of preparation gained polyester film surface measures by SEM (SEM), is 0.2-0.8 μ m.
(5) described anti-stick even particle and water-base resin at the consumption of film surface, are calculated out by following method:
In coating process, the speed of film substrate is 150m/min, and film is wide is 4m, and per hour the gross area of coating is 150 * 4 * 60=36000m
2The coating fluid of per hour using up is 72kg, and the coating fluid of average every square metre is 72/36000=0.002kg=2g, and this is wet amount.The range of solid content 1-10% of coating fluid, when the solid content of coating fluid was 1%, after drying, described anti-stick even particle and water-base resin were 2 * 0.01=0.02g/m at the consumption of film surface
2When the solid content of coating fluid was 10%, after drying, described anti-stick even particle and water-base resin were 2 * 0.1=0.2g/m at the consumption of film surface
2Therefore, anti-stick even particle and water-base resin are 0.02g-0.2g/m at the consumption of film surface
2
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 4.0% water-base resin and 0.8% colloid silicon.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking can measurement result see Table 1.
Prepare film by preceding method, wherein coating process is single face coating, and coating fluid active ingredient used is: 8.0% water-base resin and 1.6% colloid silicon.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking can measurement result see Table 1.
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 2.5% water-base resin and 0.5% colloid silicon.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking can measurement result see Table 1.
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating material active ingredient used is: 5.0% water-base resin and 1.0% colloid silicon.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking can measurement result see Table 1.
Table 1
| ? | |
|
|
|
| The single or double coating | Single face | Single face | Two-sided | Two-sided |
| Water-base resin solid content (%) | 4．0 | 8.0 | 2.5 | 5.0 |
| Colloid silicon solid content (%) | 0.8 | 1.6 | 0.5 | 1.0 |
| Confficient of static friction | 0.56 | 0.42 | 0.48 | 0.32 |
| The coefficient of kinetic friction | 0.53 | 0.39 | 0.44 | 0.30 |
Embodiment 5
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 0.9% water-base resin and 0.1% colloid silicon.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking measurement result sees Table 2.
Embodiment 6
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 6.0% water-base resin and 2.0% colloid silicon.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 2.
Embodiment 7
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 8% water-base resin and 2% colloid silicon.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 2.
Embodiment 8
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 8% water-base resin and 0.1% colloid silicon.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 2.
Table 2
| ? | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| The single or double coating | Two-sided | Single face | Single face | Two-sided |
| Water-base resin solid content (%) | 0.9 | 6.0 | 8.0 | 8.0 |
| Colloid silicon solid content (%) | 0.1 | 2.0 | 2.0 | 0.1 |
| Confficient of static friction | 0.56 | 0.39 | 0.37 | 0.58 |
| The coefficient of kinetic friction | 0.53 | 0.35 | 0.37 | 0.54 |
Embodiment 9
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 1.5% water-base resin and 0.5% colloid silicon.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking measurement result sees Table 3.
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 6.0% water-base resin and 1.5% colloid silicon.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 3.
Embodiment 11
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 3.0% water-base resin and 1.0% colloid silicon.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 3.
Embodiment 12
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 6% water-base resin and 1.2% colloid silicon.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 3.
Table 3
| ? | Embodiment 9 | |
Embodiment 11 | Embodiment 12 |
| The single or double coating | Two-sided | Single face | Two-sided | Single face |
| Water-base resin solid content (%) | 1.5 | 6 | 3.0 | 6.0 |
| Colloid silicon solid content (%) | 0.5 | 1.5 | 1.0 | 1.2 |
| Confficient of static friction | 0.50 | 0.44 | 0.37 | 0.49 |
| The coefficient of kinetic friction | 0.48 | 0.40 | 0.36 | 0.46 |
Embodiment 13
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 3.0% water-base resin and 0.8% colloid silicon.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking measurement result sees Table 4.
Embodiment 14
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 5.0% water-base resin and 1.2% colloid silicon.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 4.
Embodiment 15
Prepare film by preceding method, wherein coating process is double spread, and the formula of coating fluid active ingredient used is: 4.0% water-base resin and 1.0% colloid silicon.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 4.
Embodiment 16
Prepare film by preceding method, wherein coating process is single face coating, and the formula of coating fluid active ingredient used is: 5.0% water-base resin and 0.8% colloid silicon.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 4.
Table 4
| ? | Embodiment 13 | Embodiment 14 | Embodiment 15 | Embodiment 16 |
| The single or double coating | Two-sided | Single face | Two-sided | Single face |
| Water-base resin solid content (%) | 3.0 | 5.0 | 4.0 | 5.0 |
| Colloid silicon solid content (%) | 0.8 | 1.2 | 1.0 | 0.8 |
| Confficient of static friction | 0.46 | 0.48 | 0.35 | 0.54 |
| The coefficient of kinetic friction | 0.45 | 0.47 | 0.32 | 0.52 |
Raw material used in above-described embodiment 1 to 16: the aqueous polyurethane that water-base resin uses Dutch DSM NeoResins B.V. company to produce, trade name NeoRez R-610(DSM profit health resin), active constituent content 28%.Colloid silicon uses EKA(according to card) silica sols produced of chemical company, trade name NYACOL2034DI, active constituent content 34%(can be provided by GuangZhou, China jade of the He family chemical materials Co., Ltd).The film grade polyester chip that the Chinese Yizheng Fiber Optical plant of polyester film base material raw material employing Co., Ltd produces, trade names FG620.
Embodiment 17
Prepare film by preceding method, wherein coating process is double spread, in the present embodiment, polyester film base material raw material is polybutylene terephthalate (PBT) (PBT), and the formula of coating fluid active ingredient used is: 0.9% water-soluble polyacrylate and 0.1% colloid silicon dispersion.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking measurement result sees Table 5.
Embodiment 18
Prepare film by preceding method, wherein coating process is the single face coating, in the present embodiment, polyester film base material raw material is PETG (PET), and the formula of coating fluid active ingredient used is: 6.0% soluble polyurethane and 2.0% colloid silicon dispersion.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 5.
Embodiment 19
Prepare film by preceding method, wherein coating process is the single face coating, in the present embodiment, polyester film base material raw material is PEN (PEN), and the formula of coating fluid active ingredient used is: 8% water soluble sulfonated polyester and 2% colloid silicon dispersion.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 5.
Embodiment 20
Prepare film by preceding method, wherein coating process is double spread, in the present embodiment, polyester film base material raw material is PEN (PEN), and the formula of coating fluid active ingredient used is: 8% water soluble sulfonated polyester and 0.1% colloid silicon dispersion.The film substrate thickness that makes is 4um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 5.
Table 5
| ? | Embodiment 17 | Embodiment 18 | Embodiment 19 | Embodiment 20 |
| The single or double coating | Two-sided | Single face | Single face | Two-sided |
| Water-base resin solid content (%) | 0.9 | 6.0 | 8.0 | 8.0 |
| Colloid silicon solid content (%) | 0.1 | 2.0 | 2.0 | 0.1 |
| Confficient of static friction | 0.55 | 0.41 | 0.41 | 0.57 |
| The coefficient of kinetic friction | 0.55 | 0.38 | 0.40 | 0.55 |
Embodiment 21
Prepare film by preceding method, wherein coating process is double spread, in the present embodiment, polyester film base material raw material is PETG (PET), and the formula of coating fluid active ingredient used is: 1.5% water-soluble polyacrylate and 0.5% colloid silicon dispersion.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 6.
Embodiment 22
Prepare film by preceding method, wherein coating process is the single face coating, in the present embodiment, polyester film base material raw material is polybutylene terephthalate (PBT) (PBT), and the formula of coating fluid active ingredient used is: 6.0% water soluble sulfonated polyester and 1.5% colloid silicon dispersion.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 6.
Embodiment 23
Prepare film by preceding method, wherein coating process is double spread, in the present embodiment, polyester film base material raw material is polybutylene terephthalate (PBT) (PBT) co-polymerization modified polyester, and the formula of coating fluid active ingredient used is: 3.0% soluble polyurethane and 1.0% colloid silicon dispersion.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking measurement result sees Table 6.
Embodiment 24
Prepare film by preceding method, wherein coating process is the single face coating, in the present embodiment, polyester film base material raw material is PEN (PEN), and the formula of coating fluid active ingredient used is: 6% water-soluble polyacrylate and 1.2% colloid silicon dispersion.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 6.
Table 6
| ? | Embodiment 21 | Embodiment 22 | Embodiment 23 | Embodiment 24 |
| The single or double coating | Two-sided | Single face | Two-sided | Single face |
| Water-base resin solid content (%) | 1.5 | 6 | 3.0 | 6.0 |
| Colloid silicon solid content (%) | 0.5 | 1.5 | 1.0 | 1.2 |
| Confficient of static friction | 0.51 | 0.44 | 0.36 | 0.48 |
| The coefficient of kinetic friction | 0.49 | 0.41 | 0.35 | 0.48 |
Embodiment 25
Prepare film by preceding method, wherein coating process is double spread, and polyester raw material is polybutylene terephthalate (PBT) (PBT), and the formula of coating fluid active ingredient used is: 3.0% water soluble sulfonated polyester and 0.8% colloid silicon dispersion.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.6 μ m.Gained film surface resistance to blocking measurement result sees Table 7.
Embodiment 26
Prepare film by preceding method, wherein coating process is the single face coating, in the present embodiment, polyester film base material raw material is PETG (PET), and the formula of coating fluid active ingredient used is: 5.0% water-soluble polyacrylate and 1.2% colloid silicon dispersion.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 7.
Embodiment 27
Prepare film by preceding method, wherein coating process is double spread, in the present embodiment, polyester film base material raw material is polybutylene terephthalate (PBT) (PBT), and the formula of coating fluid active ingredient used is: 4.0% soluble polyurethane and 1.0% colloid silicon dispersion.The film substrate thickness that makes is 6um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 7.
Embodiment 28
Prepare film by preceding method, wherein coating process is the single face coating, in the present embodiment, polyester film base material raw material is PEN (PEN), and the formula of coating fluid active ingredient used is: 5.0% water soluble sulfonated polyester and 0.8% colloid silicon dispersion.The film substrate thickness that makes is 5um, and the anti-stick particle diameter that connects particle is 0.2-0.8 μ m.Gained film surface resistance to blocking measurement result sees Table 7.
Table 7
| ? | Embodiment 25 | Embodiment 26 | Embodiment 27 | Embodiment 28 |
| The single or double coating | Two-sided | Single face | Two-sided | Single face |
| Water-base resin solid content (%) | 3.0 | 5.0 | 4.0 | 5.0 |
| Colloid silicon solid content (%) | 0.8 | 1.2 | 1.0 | 0.8 |
| Confficient of static friction | 0.35 | 0.47 | 0.34 | 0.53 |
| The coefficient of kinetic friction | 0.32 | 0.44 | 0.31 | 0.53 |
The processing parameter that table 8 ultra thin type polyester film provided by the invention is commonly used
Table 9: the performance indications of ultra thin type polyester film provided by the invention and typical test results
Can draw by above-described embodiment with by the performance parameter of the ultra thin type polyester film of embodiment preparation: ultra thin type polyester film provided by the invention has good physical and mechanical properties and resistance to blocking.Preparation method's technique of ultra thin type polyester film provided by the invention is simple, easy operating, and production cost is lower.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and all is encompassed in the scope of the claims of the present invention.
Claims (5)
1. a ultra thin type polyester film, comprise the polyester film base material, it is characterized in that, described polyester film base material outer surface is bonded with the anti-stick particle that connects by water-base resin; Described polyester film base material thickness is 4-6 μ m, and the described anti-stick particle size range that connects particle is 0.2-0.8 μ m, and anti-stick even particle and water-base resin are 0.02-0.2g/m at the consumption of film surface
2
Described polyester film base material polyester raw material used is selected from polybutylene terephthalate (PBT) (PBT); Described water-base resin is selected from soluble polyurethane or water soluble sulfonated polyester; Described water-base resin and the anti-stick particle that connects form tack coat;
The inherent viscosity of described polyester raw material is: 0.55-0.70dl/g, glass transition temperature are greater than 65 ℃, and fusing point is greater than 250 ℃;
Described anti-stick even particle is silica dioxide granule;
Described water-base resin and the anti-stick particle that connects are before being bonded in described polyester film substrate surface, first be mixed with coating fluid, be applied to described polyester film substrate surface by coating technique, after drying, the anti-stick particle that connects is bonded in described polyester film substrate surface by water-base resin; Described coating fluid composed as follows, following percentage composition is weight percentage:
Water-base resin 1.5-8%
Colloid silicon 0.5-2%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution;
Film substrate has two surfaces to be coated with processing with coating fluid, and does not add the anti-stick particle that connects in above-mentioned polyester film base material.
2. a ultra thin type polyester film as claimed in claim 1, is characterized in that, described coating fluid composed as follows, and following percentage composition is weight percentage:
Water-base resin 3-5%
Colloid silicon 0.8-1.2%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution.
3. the preparation method of claim 1 or 2 described ultra thin type polyester film, is characterized in that, described ultra thin type polyester film preparation method is as follows:
Described polyester film base material adopts the stretch processes preparation, and described stretch processes comprises: raw material drying, melt extrude, and slab, longitudinal stretching, cross directional stretch, thermal finalization, cooling, traction, winding process; Increased painting process between described longitudinal stretching and cross directional stretch operation, after described longitudinal stretching operation is completed, in described painting process, the coating fluid that will contain described water-base resin and anti-stick company particle is applied to the polyester film substrate surface, described coating fluid composed as follows, following percentage composition is weight percentage:
Water-base resin 1.5-8%
Colloid silicon 0.5-2%
All the other are pure water; Described water-base resin refers to the solid active ingredient in resin aqueous solution; Described colloid silicon refers to the solid active ingredient in the colloid silicon aqueous solution; Described coating fluid is completed drying at the preheating section of cross directional stretch.
4. the preparation method of ultra thin type polyester film as claimed in claim 3, is characterized in that, the coating method that adopts in described painting process is intaglio plate coating or bar type coating.
5. a ultra thin type polyester film as claimed in claim 1 or 2, is characterized in that, described polyester film is used for the insulating materials of capacitor.
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| CN102585458A (en) * | 2012-02-07 | 2012-07-18 | 汕头市贝斯特科技有限公司 | Anti-bonding master batch for optical-grade biaxially-oriented PET (polyethylene terephthalate) films/sheets and production process thereof |
| CN103252959B (en) * | 2012-02-21 | 2015-07-22 | 中国石油化工股份有限公司 | Polypropylene film and preparation method thereof |
| CN102922836B (en) * | 2012-11-12 | 2015-10-28 | 合肥乐凯科技产业有限公司 | A kind of optical polyester film |
| CN104969305B (en) * | 2013-02-06 | 2017-03-22 | 三菱树脂株式会社 | Transparent stacked film, transparent conductive film, and gas barrier stacked film |
| CN105456231B (en) * | 2014-09-03 | 2019-11-05 | 侯玉庆 | Medical ultra-thin TPU film of one kind and preparation method thereof |
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| CN1579742A (en) * | 2003-08-08 | 2005-02-16 | 上海紫东化工塑料有限公司 | High transparent multi-layer coextrusion biaxially-oriented polyester film and its production method |
| CN1897178A (en) * | 2005-07-15 | 2007-01-17 | 上海紫东薄膜材料股份有限公司 | Two-way stretched polyester thin-film of capacitor and its production |
| US20100215902A1 (en) * | 2009-02-20 | 2010-08-26 | Thorsten Kiehne | White coated polyester film, process for production thereof and use thereof as a backside cover in solar modules |
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| JP3847550B2 (en) * | 2000-11-29 | 2006-11-22 | 帝人株式会社 | Polyester film for capacitors |
| JP2003237005A (en) * | 2002-02-18 | 2003-08-26 | Mitsubishi Polyester Film Copp | Coating film |
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| CN1579742A (en) * | 2003-08-08 | 2005-02-16 | 上海紫东化工塑料有限公司 | High transparent multi-layer coextrusion biaxially-oriented polyester film and its production method |
| CN1897178A (en) * | 2005-07-15 | 2007-01-17 | 上海紫东薄膜材料股份有限公司 | Two-way stretched polyester thin-film of capacitor and its production |
| US20100215902A1 (en) * | 2009-02-20 | 2010-08-26 | Thorsten Kiehne | White coated polyester film, process for production thereof and use thereof as a backside cover in solar modules |
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