CN104669744A - Outer coating type high-performance PO film and preparation method thereof - Google Patents
Outer coating type high-performance PO film and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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Abstract
The invention provides an outer coating type high-performance PO film and a preparation method thereof. The outer coating type high-performance PO film is characterized by being in a two-layered structure including a PO basic film and an outer coating layer, wherein the PO basic film is composed of three laminated structures including a mechanical strength layer, a transparent heat-preservation layer and a coating carrier. The preparation method comprises the following five steps of preparation of functional master batches, preparation of the PO basic film by three-layered co-extrusion, corona treatment, on-line coating, and drying and rolling. The outer coating type high-performance PO film has the good mechanical strength, low-temperature flexibility and optical performance; the wind resistance and cold resistance are improved, and the dripping and fog clearing lasting period of a product can reach 24 months, so that the light utilization rate of an agricultural film is increased; and the main contradiction that the function and the service life of the agricultural film do not synchronize is solved, so that the use value of the agricultural film is improved and the service life of the agricultural film is remarkably prolonged.
Description
Technical field
The present invention relates to a kind of agricultural film and preparation method thereof, particularly relate to a kind of outer application type high-performance PO film and preparation method thereof, belong to agricultural film manufacturing technology field.
Background technology
At present, functional plastic sheeting for farm use product mainly adopts LLDPE (LLDPE) and low density polyethylene (LDPE) (LDPE) to manufacture, generally Shortcomings in mechanical property; The mist degree itself had due to LLDPE and LDPE resin is comparatively large, and then makes plastic sheeting for farm use light utilization efficiency, heat-insulating property aspect Shortcomings, can not reach high yield, shorten the effect of crop growth phase and minimizing chemical fertilizer and Pesticide use amount.Simultaneously, the mode of tradition plastic sheeting for farm use many employings inner additive type non-drop fog-eliminating agent, in plastic sheeting for farm use uses, under the extracting effect of film surface water droplet in canopy, the drip agent added in film, antifogging agent molecule constantly to film surface migration and with water droplet loss, thus lose drip fog dispersal function gradually, and the traditional approach drip fog dispersal term of validity is generally only 5-7 month, asynchronous for service life with plastic sheeting for farm use, cause plastic sheeting for farm use to lose use value due to the forfeiture of partial function.
PO is the general reference of polyolefine material, comprise the multiple high molecular polymer such as PE, PP, EPPE, POE, EVA, its characteristic and purposes are had nothing in common with each other, agricultural PO film is a kind of novel plastic sheeting for farm use, its transparency, heat-insulating property and continue fog dispersal, drip ability is more outstanding, its production technology has very large difference with domestic abroad, and Japan generally adopts double face printing process, its product homogeneous, there is obvious advantage in stability.But the current width of japanese product is generally below 10 meters, and wide cut generally needs docking.What domestic PO film manufacturer adopted is coating stoving process, and its product quality is uneven, is all generally directly to utilize the temperature of film to spray after blowing completes, and effect can only reach half a year by 1 year.
Summary of the invention
The object of the invention is to the problems referred to above solving prior art existence, through repeatedly research and great many of experiments after, by choose reasonable and optimum organization, give the outer application type high-performance PO film and preparation method thereof of a kind of high transparent, high strength, long-acting anti-dropping type.
The technical scheme that the present invention takes is: a kind of outer application type high-performance PO film, it is characterized in that: be made up of outer coat and PO Ranvier's membrane, described PO Ranvier's membrane is made up of mechanical strength layer, heat-insulation layer, coated carrier layer, and wherein PO Ranvier's membrane raw material comprise: MLLDPE, LDPE, EPPE, POE, long-lived functional master batch, transparent heat-insulation functional master batch.
The outer application type high-performance PO film that the present invention provides can also adopt following technical scheme.
Described PO Ranvier's membrane, is characterized in that.
The mass percent of mechanical strength layer consists of:
MLLDPE/EPPE resin: 87 ~ 92%, long-lived functional master batch 8 ~ 13%.
The mass percent of heat-insulation layer consists of:
EPPE/POE resin 85 ~ 90%, transparent heat-insulation functional master batch 10 ~ 15%.
The mass percent of coated carrier layer consists of:
POE/EVA resin 87 ~ 92%, long-lived functional master batch 8 ~ 13%.
Wherein.
The prescription quality percentage of long-lived functional master batch is:
Low density polyethylene (LDPE) (LDPE) 75 ~ 85%, hindered amine as light stabilizer 6 ~ 8%, ultra-violet absorber 2 ~ 4%,
Composite antioxidant 2 ~ 4%, transparent nucleater 3 ~ 7%, dispersant 3 ~ 5%, slipping agent 1 ~ 3%,
PPA processing aid 1-2 ‰.
The prescription quality percentage of transparent heat-insulation functional master batch is:
EPPE/POE resin 50 ~ 65%, hindered amine as light stabilizer 3 ~ 5%, ultra-violet absorber 2 ~ 4%,
Composite antioxidant 1 ~ 3%, transparent heat-insulation agent 30 ~ 40%, dispersant 5 ~ 8%.PPA processing aid 1-2 ‰.Wherein.
MLLDPE is the linear low density polyethylene resin of metallocene catalysis, has narrow molecular weight distribution, the feature that mechanical strength is high, is preferably the MLLDPE resin of MI=1.0 ~ 1.5g/10min, tensile break strength >=37MPa.
EPPE is the novel polyethylene resin between a kind of molecular structure conclusion LLDPE and LDPE, has outside the excellent performance such as low-temperature heat-sealing performance, high strength, also has the characteristic such as high transparency, high glaze, very easily processing, be preferably MI=0.5g/10min.
POE is the abbreviation of ethylene-octene copolymer, and feature is that resistance to low temperature, pliability are excellent, with the outstanding transparency and processing characteristics, is preferably MI=1.0 ~ 1.5g/10min.
EVA is the abbreviation of ethylene-vinyl acetate copolymer, has outstanding low temperature flexibility and the transparency, is preferably MI=1.0 ~ 1.5g/10min.
Hindered amine as light stabilizer is TH-944: poly-[[6-[(1,1,3,3-tetramethyl butyl) amine]-1,3,5-triazines-2,4-bis-base] [(2,2,6,6-tetramethyl-4-piperidines) imines]-1,6-bis-dihexyl [(2,2,6,6-tetramethyl-4-piperidines) imines].
Ultra-violet absorber is UV-327:2-(2 '-hydroxyl-3 ', 5 '-two tertiary phenyl)-5-chlorination BTA and UV-531:2-hydroxyl-4-oxy-octyl benzophenone composite.
Composite antioxidant is the composite of B215: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2.4-di-tert-butyl-phenyl] phosphite ester.
Transparent nucleater is D-sorbite benzal derivative DBS, and dispersant is low molecular weight polyethylene wax (PE-WAX), and slipping agent is erucyl amide, and transparent heat-insulation agent is nanometer aluminum magnesium hydrocarbonate.Processing aid PPA is a kind of fluorine-containing polymer.
The preparation method of this outer application type high-performance PO film that the present invention provides, has been characterized in following steps.
(1) PO film dedicated parent material preparation: this masterbatch is made up of the powder carrier resin of 40 ~ 65%, hindered amine ultra-violet absorber, the hindered phenol composite antioxidant of 3 ~ 5%, dispersant, the transparent nucleater of 3 ~ 7%, the transparent heat-insulation agent of 20 ~ 45% of 1 ~ 3% of 3 ~ 5%.Necessary dispersant and processing aid is added in preparation process.Preparation technology is: each component of precise in proportion, and extrude on SHJ-65 parallel double-screw extruder after super mixer mixing, temperature is 140 ~ 190 DEG C, then through water-cooled, traction, air-cooled, pelletizing, oven dry.
Described vector resin is by the ethylene-octene copolymer (POE) of octene content 5% ~ 10%, the ethylene-vinyl acetate copolymer (EVA) of VA content 8%-14% or MI=1 ~ 2g/10minLDPE) in one or more form.
Hindered amine as light stabilizer is one or more in 622,944.
Ultra-violet absorber is made up of one or more in UV531,327.
Hindered phenol antioxygen be antioxidant 1010,1076, one or more in ST-252, B215.
(2) preparation of three-layer co-extruded PO Ranvier's membrane: three-layer co-extruded PO Ranvier's membrane is made up of mechanical strength layer, high heat-insulation layer, coated carrier layer.Mechanical strength layer is raw materials used is preferably mLLDPE/EPPE/ mixing, and ratio is 45 ~ 55/55 ~ 45; The raw materials used EPPE/POE/ of being preferably of high heat-insulation layer is incubated masterbatch mixing, and preferred proportion is 40 ~ 50/25 ~ 35/15 ~ 20; Coated carrier layer is raw materials used is preferably POE/EVA mixing, and preferred proportion is 35 ~ 45/40 ~ 60/.
(3) sided corona treatment: most of plastic sheeting (as poly-hydrocarbon film) belongs to non-polar polymer, surface tension is lower, general at 29-30mN/m, theoretically, if the surface tension of object is lower than 33mN/m, ink known at present and adhesive all at adhesion-tight above, therefore cannot will carry out corona method process to its surface.Its handling principle applies high frequency, high-tension electricity on a processing device, makes it produce high frequency, electrion, produces tiny intensive hyacinthine spark.The various ions produced after air ionization under the effect of highfield, accelerate and shock treatment device in plastic sheeting.Make the chemical bond rupture of plastic molecules and degrade, increasing surface roughness and surface area.Also can produce a large amount of ozone during electric discharge, ozone is a kind of strong oxidizer, and plastic molecules can be made to be oxidized, and produces carbonyl and the stronger group of peroxide isopolarity, thus improves its surface energy.Make film surface reach 40-42 dyne, such solution is more easily attached to film surface.
(4) apply online: outer for preprepared coating liquid deionized water is diluted in proportion, deionized water electrical conductivity controls at 5.0-10.0 μ s/cm, PO Ranvier's membrane after sided corona treatment immerses coating liquid and derives from coating groove with the speed of 20 ~ 25m/min, completes and applies operation online.
(5) dry rolling: the PO film importing drying baker through coating is dried, and bake out temperature is set as 70 ~ 80 DEG C, and rolling speed is synchronous with coating speed: 20 ~ 25m/min.
Compared with prior art, the invention has the beneficial effects as follows.
Use new type resin EPPE and POE in the production process of application type high-performance PO film outside, in long-lived functional master batch, use transparent nucleater DBS, significantly promote PO film light transmittance, thus the utilization rate of light is got a promotion, reach the object improving service efficiency.
Due to the use of new type resin EPPE and POE, make PO film have better mechanical strength and low temperature flexibility, PO film wind resistance cold performance is got a promotion, improves the service life of PO film.
The combination of outer coat and PO Ranvier's membrane is better, extends the drip term of validity.
Because transparent heat insulating material selection is suitable, thus to lifting temperature of shed, shorten plant growth time generation beneficial effect.
Detailed description of the invention
Embodiment 1.
The concrete steps preparing outer application type high-performance PO film are as follows:
The preparation of A, long-lived functional master batch
Low density polyethylene (LDPE) (MI=1.0g/10min) 75 ㎏
Hindered amine as light stabilizer TH944 2 ㎏
Ultra-violet absorber UV-327/UV-531 0.5/1.5kg
Composite antioxidant B215 0.6kg
Transparent nucleater DBS 2.2kg
Dispersant PE-WAX 0.5kg
Slipping agent 0.3kg
Processing aid PPA 0.08kg
The preparation of B, transparent heat-insulation functional master batch
EPPE（MI=1.0g/10min） 25kg
POE（MI=1.5g/10min） 25kg
Hindered amine as light stabilizer TH944 1.2 ㎏
Ultra-violet absorber UV-327/UV-531 0.3/1.0kg
Composite antioxidant B215 0.4kg
Nanometer aluminum magnesium hydrocarbonate 27kg
Dispersant PE-WAX 0.8kg
Processing aid PPA 0.15kg.
The each component precise of above A, B masterbatch, drops into high-speed mixer mixing, carries out granulation through 65 parallel double-screw extruders, stand-by after dry.
The preparation of C, PO Ranvier's membrane.
The preparation of described PO Ranvier's membrane adopts three-layer co-extruded blow molding process, each layer resin used is selected by following requirement, add A, B functional master batch in proportion, through three-layer co-extruded technique blow molding, overall film thickness is 0.1mm, layer thickness ratio is 1/2/1, and each layer raw material is chosen as follows by mass percentage:
Outer (coated carrier layer)
POE（MI=1.0g/10min） 40%
EVA(MI=1.5g/10min, VA content 12%) 48%
Functional master batch A 12%
Middle level (transparent insulating layer)
EPPE（MI=0.5g/10min） 45%
POE（MI=1.0g/10min） 43%
Functional master batch B 12%
Internal layer (mechanical strength layer)
MLLDPE（MI=0.8g/10min） 45%
EPPE（MI=0.5g/10min） 43%
Functional master batch A 12%.
The material taken enters the mixing that mixer carries out 3-5min, make a gift to someone in three extruders respectively, extruder draw ratio is 30:1, die head is three layers of complex centre feed type, material respectively through the melting of three extruders, plastify, be expressed into triple extrusion die head through conveyor screw continue plasticizing, jointly extruded by circular port mould, from circular die extrusion compound tubular membrane pipe, cross directional stretch under the compressed air inflation effect that the film Guan Mo heart blows into, longitudinal drawing-off of the air cooling simultaneously through circular air port and upper traction nip rolls and obtained PO Ranvier's membrane.
D, sided corona treatment: before PO Ranvier's membrane immerses coating liquid, sided corona treatment is carried out to film, pass through surge, under the effect of high voltage electric field, electron stream carries out strong impact to PO Ranvier's membrane, make film wildness, become coarse, increase surface area, thus improving coating liquid to the immersional wetting on Ranvier's membrane surface, the Ranvier's membrane surface tension requirements after sided corona treatment reaches 42 dynes per centimeter.
E, coating operation: pre-configured coating liquid is poured in coating groove, the PO Ranvier's membrane after sided corona treatment is qualified with the speed of 20 ~ 25m/min process from coating groove, completes coating under deflector roll effect.
F, oven dry rolling: the PO film completing coating enters drying baker, speed is synchronously 20 ~ 25m/min with coating operation, bake out temperature 75 DEG C.Through rolling, note rice, weighing, inspection, packaging warehouse-in.
G, performance test: carry out performance test to the outer coating functions PO film prepared according to above technique, content measurement is: light transmittance, hot strength, elongation at break, the drip term of validity, outcome record is as subordinate list.
Embodiment 2(conventional functionality plastic sheeting for farm use).
A, step B are with embodiment 1.
The preparation of C, PO Ranvier's membrane.
The preparation of described PO Ranvier's membrane adopts three-layer co-extruded blow molding process, each layer selects high performance resin on request, add A, B functional master batch in proportion, through three-layer co-extruded technique blow molding, overall film thickness is 0.1mm, layer thickness ratio is 1/2/1, and each layer raw material is chosen as follows by mass percentage:
Outer (coated carrier layer)
LLDPE（MI=1.0g/10min） 45%
EVA(MI=1.5g/10min, VA content 12%) 43%
Functional master batch A 12%
Middle level (transparent insulating layer)
LDPE（MI=0.5g/10min） 45%
LLDPE（MI=1.0g/10min） 43%
Functional master batch B 12%
Internal layer (mechanical strength layer)
MLLDPE（MI=0.8g/10min） 55%
LDPE（MI=0.5g/10min） 33%
Functional master batch A 12%
Method for manufacturing thin film and D E F G step and embodiment 1 with.
Subordinate list: outer coating functions PO film detection perform table
Claims (5)
1. an outer application type high-performance PO film, it is characterized in that being made up of outer coat and PO Ranvier's membrane, described PO Ranvier's membrane is made up of mechanical strength layer, heat-insulation layer, coated carrier layer, and wherein PO Ranvier's membrane raw material comprise: MLLDPE, LDPE, EPPE, POE, long-lived functional master batch, transparent heat-insulation functional master batch.
2. outer application type high-performance PO film according to claim 1, is characterized in that the composition of described PO Ranvier's membrane:
The mass percent of mechanical strength layer consists of:
MLLDPE/EPPE resin: 87 ~ 92%, long-lived functional master batch 8 ~ 13%;
The mass percent of heat-insulation layer consists of:
EPPE/POE resin 85 ~ 90%, transparent heat-insulation functional master batch 10 ~ 15%;
The mass percent of coated carrier layer consists of:
POE/EVA resin 87 ~ 92%, long-lived functional master batch 8 ~ 13%.
3. outer application type high-performance PO film according to claim 2, is characterized in that:
The prescription quality percentage of long-lived functional master batch is:
Low density polyethylene (LDPE) (LDPE) 75 ~ 85%, hindered amine as light stabilizer 6 ~ 8%, ultra-violet absorber 2 ~ 4%,
Composite antioxidant 2 ~ 4%, transparent nucleater 3 ~ 7%, dispersant 3 ~ 5%, slipping agent 1 ~ 3%,
PPA processing aid 1-2 ‰.
4. outer application type high-performance PO film according to claim 2, is characterized in that:
The prescription quality percentage of transparent heat-insulation functional master batch is:
EPPE/POE resin 50 ~ 65%, hindered amine as light stabilizer 3 ~ 5%, ultra-violet absorber 2 ~ 4%,
Composite antioxidant 1 ~ 3%, transparent heat-insulation agent 30 ~ 40%, dispersant 5 ~ 8%, PPA processing aid 1-2 ‰.
5. the preparation method of outer application type high-performance PO film according to claim 1, is characterized in that there are following steps:
(1) PO film dedicated parent material preparation: this masterbatch is made up of the powder carrier resin of 40 ~ 65%, hindered amine ultra-violet absorber, the hindered phenol composite antioxidant of 3 ~ 5%, dispersant, the transparent nucleater of 3 ~ 7%, the transparent heat-insulation agent of 20 ~ 45% of 1 ~ 3% of 3 ~ 5%, necessary dispersant and processing aid is added in preparation process, preparation technology is: each component of precise in proportion, extrude on SHJ-65 parallel double-screw extruder after super mixer mixing, temperature is 140 ~ 190 DEG C, then through water-cooled, traction, air-cooled, pelletizing, oven dry;
Described vector resin is by the ethylene-octene copolymer (POE) of octene content 5% ~ 10%, the ethylene-vinyl acetate copolymer (EVA) of VA content 8%-14% or MI=1 ~ 2g/10minLDPE) in one or more form;
Hindered amine as light stabilizer is one or more in 622,944, and ultra-violet absorber is made up of one or more in UV531,327, hindered phenol antioxygen be antioxidant 1010,1076, one or more in ST-252, B215;
(2) preparation of three-layer co-extruded PO Ranvier's membrane: three-layer co-extruded PO Ranvier's membrane is made up of mechanical strength layer, high heat-insulation layer, coated carrier layer, wherein
Mechanical strength layer is raw materials used is preferably mLLDPE/EPPE/ mixing, and ratio is 45 ~ 55/55 ~ 45;
The raw materials used EPPE/POE/ of being preferably of high heat-insulation layer is incubated masterbatch mixing, and preferred proportion is 40 ~ 50/25 ~ 35/15 ~ 20;
Coated carrier layer is raw materials used is preferably POE/EVA mixing, and preferred proportion is 35 ~ 45/40 ~ 60/;
(3) sided corona treatment: carry out corona method process to Plastic film surface, makes film surface reach 40-42 dyne, makes solution more easily be attached to film surface;
(4) apply online: outer for preprepared coating liquid deionized water is diluted in proportion, deionized water electrical conductivity controls at 5.0-10.0 μ s/cm, PO Ranvier's membrane after sided corona treatment immerses coating liquid and derives from coating groove with the speed of 20 ~ 25m/min, completes and applies operation online;
(5) dry rolling: the PO film importing drying baker through coating is dried, and bake out temperature is set as 70 ~ 80 DEG C, and rolling speed is synchronous with coating speed: 20 ~ 25m/min.
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