CN105733017A - Method for surface treatment of microporous polyolefin film, surface charging apparatus and microporous polyolefin film - Google Patents
Method for surface treatment of microporous polyolefin film, surface charging apparatus and microporous polyolefin film Download PDFInfo
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- CN105733017A CN105733017A CN201510994189.5A CN201510994189A CN105733017A CN 105733017 A CN105733017 A CN 105733017A CN 201510994189 A CN201510994189 A CN 201510994189A CN 105733017 A CN105733017 A CN 105733017A
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- 229920000098 polyolefin Polymers 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004381 surface treatment Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 129
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 239000012982 microporous membrane Substances 0.000 claims description 122
- 239000002904 solvent Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 11
- 239000002798 polar solvent Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- 239000010408 film Substances 0.000 description 83
- 239000010409 thin film Substances 0.000 description 70
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 238000002788 crimping Methods 0.000 description 9
- 238000004804 winding Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 229940057995 liquid paraffin Drugs 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920005678 polyethylene based resin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Manufacturing & Machinery (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
The invention provides a method for surface treatment of microporous polyolefin film. The method can control an electrification state of the microporous polyolefin film surface into required distribution. The method comprises the following steps: bring a first zone of the microporous polyolefin film surface on one side into contact with a liquid, conducting friction so as to produce positive electricity or negative electricity so as to enable a second zone of the microporous polyolefin film on the other side opposite to the first zone to have reversed polarity electrification, controlling the electrification distribution of the two surfaces of the microporous polyolefin film.
Description
Technical field
The present invention relates to the surface treatment method of the micro-porous membrane of a kind of polyolefin, surface Charging system and the micro-porous membrane of polyolefin.
Background technology
When being wound in film roll by micro-for polyolefin porous membrane, it is possible to owing to being mixed into the reasons such as air, cause thin film crimping uneven.
As preventing one of uneven countermeasure of thin film crimping, it is proposed that there is the method (patent documentation 1) such as using contact roller.But, use the problem that contact roller existence can produce impression on thin film.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2007-099420
Patent documentation 2: Japanese Patent Laid-Open 2006-210160
Summary of the invention
The problem that invention to solve
The micro-porous membrane of polyolefin has electrical insulating property, once after charged, adopt conventional ionotron to be difficult to electrostatic is completely eliminated.Therefore, the currently proposed method (such as, patent documentation 2) having several elimination electrical insulating property film surface electrostatic.
The present invention forms based on surface actively this brand-new idea exploitation charged making the micro-porous membrane of polyolefin, purpose is in that by the electriferous state on micro-for polyolefin porous membrane surface is controlled into required distribution, thus improving the situation owing to the polyolefin charged processing film caused of micro-porous membrane surface imperfection and treatability decline.
For solving the scheme of problem
The surface treatment method of the micro-porous membrane of polyolefin of the 1st form of the present invention is the first area contact liq by making the micro-porous membrane surface of the described polyolefin of side, positively charged or negative electricity after friction, so that the second area reversed polarity on described polyolefin micro-porous membrane surface of the opposite side relative with described first area is charged, control the charged distribution on described polyolefin micro-porous membrane two surface.
The preparation method of the micro-porous membrane of polyolefin of the 2nd form of the present invention includes adopting the surface treatment method of the micro-porous membrane of said polyolefins to carry out surface treatment.
The surface treatment method of the micro-porous membrane of polyolefin of the 3rd form of the present invention is that at least one side surface of micro-for described polyolefin porous membrane is contacted the surface tension polar solvent lower than 50mN/m, eliminates the electrostatic on described polyolefin micro-porous membrane two surface.
The surface Charging system of the micro-porous membrane of polyolefin of the 4th form of the present invention possesses solvent maintaining part, delivery section and liquid level adjustment portion, described solvent maintaining part can keep liquid, described delivery section can carry the micro-porous membrane of described polyolefin, described solvent maintaining part can random time be contacted with two surfaces of the micro-porous membrane of polyolefin, described liquid level adjustment portion adjusts at least one side surface of the micro-porous membrane of described polyolefin and the contact surface of described liquid, when making two surfaces at the micro-porous membrane of described polyolefin leave described solvent maintaining part, between regulation region and the region relative with described polyolefin micro-porous membrane surface of opposite side on described polyolefin micro-porous membrane surface of side, different from the time that described liquid separates.
The micro-porous membrane of polyolefin of the 5th form of the present invention adopts the preparation method of the micro-porous membrane of said polyolefins to be prepared.
Invention effect
The micro-porous membrane of polyolefin that the electriferous state on micro-for thermoplasticity polyolefin porous membrane surface is controlled into required distribution is obtained in accordance with the invention it is possible to simple.By adopting this kind of micro-porous membrane of polyolefin, it is possible to after making, the processing film in operation and treatability are good.
Accompanying drawing explanation
Fig. 1 indicates that an example figure of the surface treatment method of the micro-porous membrane of polyolefin.
Fig. 2 indicates that an example figure on polyolefin micro-porous membrane surface electriferous state (deduction).
Fig. 3 indicates that an example figure of the surface Charging system of the micro-porous membrane of polyolefin.
Fig. 4 indicates that an example figure of the surface Charging system of the micro-porous membrane of polyolefin.
Fig. 5 indicates that an example figure of the surface Charging system of the micro-porous membrane of polyolefin.
Fig. 6 indicates that an example (longitudinally two surface reversed polarity the are charged) figure of the charged distribution in surface of the micro-porous membrane of polyolefin.
Fig. 7 indicates that an example (laterally two surface reversed polarity the are charged) figure of the charged distribution in surface of the micro-porous membrane of polyolefin.
Detailed description of the invention
Hereinafter, embodiments of the present invention are illustrated, but the invention is not restricted to this.It addition, in the following description, the symbol that identical key element mark is identical, and omit repeat specification.
Fig. 1 indicates that an example figure of the surface treatment method of the micro-porous membrane of polyolefin of present embodiment.The processing method of present embodiment is after being immersed in liquid 20,21 by micro-for polyolefin porous membrane 10 (hereinafter referred to as " thin film "), when extracting out from this liquid 20,21, compare the liquid level of the liquid 20 of the side, first area 11 of the film surface of side, improve the liquid level of the liquid 21 of second area 12 side of the film surface of the opposite side relative with first area 11.Thus, make first area 11 positively charged or negative electricity, and by the second area 12 polarity relative to first area, reversed polarity ground is charged.That is, during the positively charged of first area, second area is electronegative, and when first area is electronegative, second area positively charged.
The micro-porous membrane 10 of polyolefin has electrical insulating property, is not particularly limited.Such as, the polyolefin films etc. such as micro-porous polyethylene film, polypropylene film, polystyrene film can be enumerated.In addition, there is no particular restriction for the preparation method of these thin film, conventional well-known method can be adopted, such as by after the molten mixture stretching being made up of vistanex and film forming solvent, film forming, remove the method (damp process) of film forming solvent or the method (dry process) etc. stretched on a direction of principal axis or biaxially oriented by polyolefin resin film.As this kind of micro-porous membrane of polyolefin, it is however generally that, for instance vapour lock degree when thickness is 1.0～60 μm, void content is 20～80%, thickness is scaled 20 μm is 10～5000 seconds/100cc.It addition, adopt the purposes of the micro-porous membrane of polyolefin of the surface treatment method of present embodiment, there is no particular restriction, for instance may be used for accumulator diaphragm, thus treatability when improving operation.
As liquid 20,21, it is possible to supply electric charge to film surface, be not particularly limited.For example, it is preferable to use the liquid that surface tension is high and low relative to the wettability of the micro-porous membrane of polyolefin.Liquid 20,21 suitably can select according to the kind etc. of thin film used, wherein, considers from the angle being easily adjusted, it is preferred to use the natural waters such as ultra-pure water, distilled water, ion exchange water, well water etc. are as liquid.It addition, water also can contain other compositions such as a small amount of alcohol, now preferably 20 DEG C time surface tension be the liquid of more than 50mN/m, more preferably surface tension is the liquid of more than 60mN/m.Surface tension can measure according to the JISK2241 method specified.
It addition, the liquid 21 contacted with second area 12 can and the liquid 20 of side, first area 11 identical or different.By following liquid level adjustment portion etc., when suitably supplying liquid 21 to second area, the class of liquids soaking the micro-porous membrane of polyolefin 10 can be identical or different with the class of liquids being used for adjusting liquid level.
It is the speed that can compensate for electric charge by making first area 11 charged at second area 12 on the other side by the speed that micro-for polyolefin porous membrane 10 is extracted out from liquid 20,21, it is possible to by controlling the transporting velocity of thin film, suitably adjust.Additionally, as described below, it is possible to according to the speed extracting thin film out, adjust the carried charge of first area 11.
When making the first area of the micro-porous membrane of polyolefin 10 or second area charged, the temperature of liquid 20,21 is not particularly limited, but usually room temperature, for instance 2～50 DEG C, 10～30 DEG C.
The liquid level method of adjustment of liquid 20,21 is not particularly limited, it is possible to be adjusted by various methods.Such as, as it is shown on figure 3, by watering liquid 21 at the film surface of second area side, such that it is able to adjust the liquid level of the liquid 21 of second area side, so as to the liquid level of the liquid 20 higher than side, first area.In addition, by to arranging influent in the frame higher than liquid levels of the position, or make non-woven fabrics or the sponge etc. with the property of water-bearing contact the methods such as thin film single side surface (such as, Fig. 4 (A)) in the position higher than liquid levels, can be adjusted too.For example, it is possible to hydrophobic component to be arranged in the liquid level place of side, first area, thus the liquid level adjusting side, first area makes it below the liquid level (such as, Fig. 4 (B)) of second area side.
According to film surface and the wettability of liquid, the micro-transporting velocity of porous membrane 10 of polyolefin, the gauffer of film surface and shrinkage cavity degree and frequency, the vibration etc. of the liquid level of liquid 20,21 and easy shaking degree, can suitably adjust the difference of height of liquid levels.
In addition, consider from the angle for the film surface adjustment simplification of liquid level of liquid 20,21, stability, liquid level and the surface angulation θ of thin film either side when preferred liquid stands are 5 °～85 °, when being more preferably 60 °～83 °, thin film can be extracted in this case from described liquid out.It addition, angle, θ can be the angle, θ 1 of the film surface of side, first area and liquid levels, it is possible to be the angle, θ 2 of the film surface of second area side and liquid levels.
Moreover it is possible to the wettability according to liquid Yu thin film, adjust angle, θ, from liquid, extract thin film out, so that the liquid level stabilizing ground of first area is lower than the liquid level of second area.Angle, θ now is film surface and the liquid levels angulation θ 1 of side, first area, it is preferable that 5 °～85 °, more preferably 60 °～83 °.Because when angle, θ 1 is in above-mentioned scope, in the first region, it is possible to effectively drain liquid from film surface.It addition, from tank extract out thin film time angle, θ be vertical direction time, according to the apparent condition of thin film, process device vibration etc., liquid levels may uneven be rocked.
Hereinafter, about the positive and negative reversed polarity in thin film two surface supposition mechanism time charged, illustrate with reference to Fig. 2.It addition, the present invention is not limited to this mechanism.Fig. 2, as an example of present embodiment, indicates that employing polyethylene-based resin thin film is as the micro-porous membrane 10 of polyolefin, the figure of the film surface electriferous state speculated when using water as liquid 20,21.
What Fig. 2 (A) represented is the state by being drawn to from liquid in air by micro-for polyolefin porous membrane 10, when making the first area 11 of the film surface of contact liq 20 expose to liquid level from liquid 20.At this point it is possible to speculate that the first area 11 on polyolefin micro-porous membrane 10 surface rubs with liquid 20, thus with negative electricity 30.It addition, the arrow in Fig. 2 represents the conveying direction of thin film.The carried charge of first area 11 according to the kind of the micro-porous membrane of polyolefin 10, the kind of liquid 20, the liquid level of described liquid 20 and first area 11 angulation, the liquid level difference of height of liquid and extract the speed etc. of thin film out, suitably can adjust.
Fig. 2 (B) indicates that the state diagram extracting thin film further out.Its expression is that the first area 11 by making to expose to liquid 20 liquid level continues electronegative so that the second area 12 relative with first area 11 with the positive electricity 31 of reversed polarity to compensate the state of this electric charge.Now, second area 12 contacts with liquid 21, therefore can carry out charge compensation from liquid 21 so that the easy reversed polarity of second area 12 is charged.
If it addition, second area 12 can compensate for the electric charge produced in first area 11, then can not also contact liq 21.For example, it is also possible to arrange the device producing plus or minus ion in second area 12 side.
When what Fig. 2 (C) represented is extract second area 12 out from liquid 21, first area 11 and second area 12 all maintain the state that reversed polarity is charged.So, by being immersed in liquid 20,21 by micro-for polyolefin porous membrane 10, and control this simple procedures of liquid level of liquid 20,21 when extracting out from liquid, the thin film being just obtained in that on the region homogeneous band needed for film surface plus or minus electricity.
It addition, about the charged distribution of film surface, for instance as described in Japanese Patent Laid-Open 2006-210160 publication, it is possible to by film surface being contacted the metallic plate of ground connection, measuring the surface potential of opposite side, being evaluated with this.The measurement of surface potential can use the potential measuring instrument of routine.When the micro-porous membrane of polyolefin, the absolute value of surface potential now is typically about 40～150V.
Additionally, by the surface treatment of above-mentioned thin film being joined in the conventional micro-porous membrane manufacturing process of polyolefin, just can easily control the charged distribution of film surface.Once thin film has carried out surface treatment, make two surface reversed polarity charged, even if carrying out stretching process, heat treatment, crosslinking Treatment etc. later, it is also possible to play relevant effect.
Additionally, once thin film has carried out surface treatment, making two surface reversed polarity charged, even if carrying out film roll conveying etc., causing surface portion charged owing to being charged by friction or peeling off electric discharge, it is also possible to eliminate the charged of this part with conventional ionotron.After such elimination part is charged, the charged polarity in the surface of thin film is the same, and two surface reversed polarity are charged.
Additionally, by charged thin film pockety is immersed in polar solvent, it is also possible to eliminate electrostatic.Such as, the surface tension polar solvent lower than 50mN/m is high relative to thin permeability of the membrane, may pass through the pore in thin film, and liquid can infiltrate into the film surface of opposite side, and the reversed polarity on neutralized film two surface is charged, therefore, it is possible to eliminate electrostatic.Such as, be immersed in methyl ethyl ketone or dichloromethane polar solvent by the micro-porous membrane of polyolefin charged for two surface reversed polarity, or spread upon on the either side surface of thin film, then these polar solvents can infiltrate in thin film, eliminates the described charged of thin film.
Can be used for the polar solvent of this type of purposes to be not particularly limited, it is possible to use ketone, ethers, alcohols, chloro-hydrocarbons series solvent and these mixture etc..It addition, about liquid with or without infiltrating in thin film, it is possible to thin film is soaked in a liquid, during extraction, visually determines whether infiltration.
Other embodiments as film surface processing method, it is also possible to do not extract thin film from liquid out, but move liquid, so that film surface is charged.Method as mobile liquid, include, for example following method: make in the Porous elastic components such as sponge containing liquid, by this component, mobile thin film after making thin film contact with liquid, what change the liquid such as scraping blade, aerator removing means on each surface arranges position, makes liquid separate (such as Fig. 5) from thin film.
Fig. 3 indicates that an example figure of the film surface Charging system 100 of present embodiment.By using the surface Charging system 100 of this thin film, it is possible to easily and efficiently carry out above-mentioned film strip electric treatment.The Charging system 100 of thin film possesses solvent maintaining part 40, delivery section (not shown) and solvent contacts adjustment portion 60, described delivery section can carry the micro-porous membrane 10 of polyolefin, described solvent contacts adjustment portion 60 to adjust at least one side surface of described thin film and the contact surface of liquid 20,21.It addition, the arrow in Fig. 3 represents the conveying direction of thin film.
Solvent maintaining part 40 can keep liquid 22, and its shape, size etc. suitably can adjust according to the area size controlling charged distribution.For example, it is possible to be set as the form of liquid tank.
Delivery section is not shown, it is possible to the conveying micro-porous membrane 10 of polyolefin so that solvent maintaining part 40 contacts with two surface random times of the micro-porous membrane 10 of polyolefin, for instance can adopt conveying roller etc..The rotating speed of conveying roller, material, size and position etc. is set is not particularly limited, it is possible to suitably adjust.
Solvent contacts adjustment portion 60 adjusts the liquid level that at least one side surface of thin film contacts with liquid 20,21, make when described solvent maintaining part is left on two surfaces of thin film, between regulation region and the region relative with described film surface of opposite side of the described film surface in side, different from the time that liquid 20,21 separates.Such as, liquid level adjustment portion 60 can possess ejection of solvent portion, to guarantee to spray liquid 21 to the one side of thin film.
Additionally, as shown in Fig. 4 (A), liquid level adjustment portion 61 arranges position higher than the frame of liquid levels, non-woven fabrics or sponge etc..In this frame, supply liquid, or make non-woven fabrics or sponge etc. containing liquid, thus adjusting the liquid level of liquid 21.Additionally, as shown in Fig. 4 (B), liquid level adjustment portion 62 can also be hydrophobicity component.Thereby, it is possible to make the liquid level being provided with the liquid 20 of the hydrophobicity member side liquid level lower than the liquid 21 of opposite side.
Fig. 5 indicates that the figure of other embodiments of film surface Charging system 100.As it is shown in figure 5, solvent maintaining part 41 can set that the form into the porous member such as non-woven fabrics or sponge, to guarantee to suck liquid 20,21.Liquid level adjustment portion 63a, 63b can be separately positioned on either side or the opposite side of film surface.Additionally, be arranged on not relative with liquid level adjustment portion 63a position by liquid level being adjusted portion 63b, such that it is able to make the removing time of liquid 20,21 contacted with film surface on each surface different.It addition, liquid level adjustment portion also can be provided only on the either side of film surface.
By adopting surface treatment method or the device of above-mentioned present embodiment, it is possible to obtain charged distribution obtains the micro-porous membrane of polyolefin controlled.Can, according to purpose, be required distribution by the charged profile set of thin film.For example, it is possible to make a side surface and opposite side surface similarly reversed polarity charged (two surface reversed polarity are charged).In addition, as shown in Figure 6, can along film length direction (MD), similarly positively charged or negative electricity, and the region at thin film laterally (TD) upper positively charged or negative electricity is alternately arranged (longitudinally two surface reversed polarity are charged), or as shown in Figure 7, along thin film laterally (TD), similarly positively charged or negative electricity, and the region at film length direction (MD) upper positively charged or negative electricity is alternately arranged (laterally two surface reversed polarity are charged).
Such as, above-mentioned two surface reversed polarity thin film charged, that longitudinally charged the or horizontal two surface reversed polarity of two surface reversed polarity are charged, when it is wound on and becomes film rolling in film roll, each film surface reversed polarity of contact is charged relatively, therefore can improve the adhesiveness between thin film.Thus, when making film rolling, without the situation such as crimping is uneven, reeling condition is good.
The thin film that particularly longitudinally two surface reversed polarity are charged, is expected to reduce further situation laterally uneven during winding.Additionally, the thin film that laterally two surface reversed polarity are charged is expected to suppress the situation of winding tension.
Additionally, make the charged thin film of the same reversed polarity of each film surface, when unrolling the film rolling wound, owing to eliminating because of situations such as the uneven charged thin film bendings caused, it is thus possible to improve processability and treatability.According to different application targets, it is possible to make the film surface of side mix positive negative charging in the way of having the systematicness of regulation, such that it is able to make thin film be bent into required shape, or become round.
Additionally, method according to present embodiment carries out the thin film after surface treatment, on the two sides (positive and negative) of thin film, mutual reversed polarity is charged, and therefore formal potential is zero, and being unrolled in film roll by winding film is not easy to be subject to the charging effect of adhesive dust etc. again.
As by the homogeneous band positive electricity of film surface or the region of negative electricity in film length direction or the transversely parallel method being alternately arranged, be not particularly limited, for instance the method that following embodiment 2,3 can be adopted.It addition, about the charged distribution of film surface, it is possible to by being placed on the film surface on the metal of ground connection with the operation of the gauge head of potential measuring instrument, thus being together evaluated with carried charge.Potential measurement can adopt the thin film on the metal resting on ground connection, it is also possible to moves thin film on the conductor roller of ground connection and measures.Further, it is also possible to by spilling the different colored carbon powder mixture of polarity (such as, the red carbon powder of positively charged and the mixture of electronegative blue carbon powder), observe its color and be evaluated.Compared with the film surface region being not handled by, carry out its color even of film surface region after the relevant film surface of present embodiment processes.
Embodiment
[embodiment 1] (positive and negative reversed polarity is charged equably)
From the polymer of mould polyethylene extrusion and the Liquid Paraffin as plasticizer cooperation, it is shaped to thin slice.Afterwards, thin slice is carried out the simultaneously bi-directionally stretching of 5 × 5 times, make plasticizer in washing procedure in prescribed limit, wash, thus obtaining the micro-porous membrane of polyolefin.Afterwards, for adopting water (ion exchange water: surface tension is 72mN/m) to carry out the surface treatment of thin film as liquid, by thin film traverse tank, only spray water to the one side of the micro-porous membrane stretched out from tank, only in the unilateral height uniformly improving the water surface on thin-film width direction of thin film, wind after implementing thermal fixation, thus obtaining the original film roll of micro-porous membrane.The film surface (water surface relatively downside) relative with the water surface and the angle initialization of the water surface (time static) are 83 °.From original film roll last time of micro-porous membrane around micro-porous membrane, do not use contact roller, cracked with microtome.The micro-porous membrane volume obtained is without situations such as crimping are uneven, and reeling condition is good.
Roll up micro-porous membrane of the 1m that unrolls from the micro-porous membrane obtained, film roll is maintained at the aerial of 1.5m height.The thin film unrolled is sagging due to deadweight, has no generation gauffer etc..The film surface unrolled the film rolling obtained and the film surface of opposition side are mutually with reversed polarity uniform charged.It addition, about charged distribution, the micro-porous membrane obtained is placed on the metallic plate of ground connection, with the gauge head inspection of potential measuring instrument the surface evaluating opposite side.Result is, the charged polarity on each surface of thin film is identical, and the current potential absolute value of film surface is 50～100V.
[embodiment 2] (laterally positive and negative reversed polarity is charged)
Water to the surface of the micro-porous membrane side stretched out from tank and the surface alternating spray certain time of opposition side, it is adjusted at regular intervals, the liquid level making either side surface alternately uprises, wind after implementing thermal fixation, implement the operation identical with embodiment 1 in addition, thus obtaining the original film roll of micro-porous membrane.From original film roll last time of micro-porous membrane around micro-porous membrane, do not use contact roller, carry out cracking, winding with microtome, it is thus achieved that micro-porous membrane is rolled up.The micro-porous membrane volume obtained is without situations such as crimping are uneven, and reeling condition is good.
[embodiment 3] (longitudinally positive and negative reversed polarity is charged)
From the multiple nozzles arranged at certain intervals, surface sprinkling to the micro-porous membrane side stretched out from tank, moving direction relative to thin film, alternately improve the height of liquid level, wind after implementing thermal fixation, implement the operation identical with embodiment 1 in addition, thus obtaining the original film roll of micro-porous membrane.From original film roll last time of micro-porous membrane around micro-porous membrane, do not use contact roller, carry out cracking, winding with microtome, it is thus achieved that micro-porous membrane is rolled up.The micro-porous membrane volume obtained is without situations such as crimping are uneven, and reeling condition is good.
[comparative example 1]
From the polymer of mould polyethylene extrusion and the Liquid Paraffin as plasticizer, it is shaped to thin slice.Afterwards, thin slice is carried out the simultaneously bi-directionally stretching of 5 × 5 times, make plasticizer in washing procedure in prescribed limit, wash, then implement thermal fixation again and wind, thus obtaining the original film roll of micro-porous membrane.From original film roll last time of micro-porous membrane around micro-porous membrane, do not use contact roller, carry out cracking, winding with microtome, it is thus achieved that micro-porous membrane is rolled up.The micro-porous membrane obtained rolls out the situation that existing crimping is uneven, and reeling condition is not good.
[comparative example 2]
On the direction perpendicular relative to liquid level, from tank, taking out micro-porous membrane, do not implement the operation sprayed water to any surface of thin film, implementing the operation identical with embodiment 1 in addition, thus obtaining the original film roll of micro-porous membrane.From original film roll last time of micro-porous membrane around micro-porous membrane, do not use contact roller, carry out cracking, winding with microtome, it is thus achieved that micro-porous membrane is rolled up.The micro-porous membrane obtained rolls out the situation that existing crimping is uneven, and reeling condition is not good.
The film surface unrolled the film rolling obtained and the film surface of opposition side are mutually transversely uneven charged at thin film moving direction and thin film with reversed polarity.Can speculate occur the reason of this situation be in that from tank take out thin film time, the water surface there occurs and rocks unevenly.
[embodiment 4] (again charged after elimination electrostatic)
Original film roll last time of the micro-porous membrane obtained from comparative example 2, around micro-porous membrane, adopts gravure coater that it is coated with methyl ethyl ketone (MEK) so that it is to be again wound after drying simultaneously.The carried charge of the micro-porous membrane obtained is 0V.
Unroll above-mentioned micro-porous membrane, is passed through tank, the height that only in thin film one side on thin-film width direction uniformly improve the water surface the same as embodiment 1, winds, thus obtaining the original film roll of micro-porous membrane after implementing thermal fixation.From original film roll last time of micro-porous membrane around micro-porous membrane, do not use contact roller, cracked with microtome.The micro-porous membrane volume obtained is without situations such as crimping are uneven, and reeling condition is good.
Industrial applicability
The surface treatment method of the micro-porous membrane of polyolefin that the present invention is correlated with and device can control the electriferous state of the micro-porous membrane of polyolefin, therefore can be widely used.Particularly it is suitable for the barrier film etc. of requirement filming.
Claims (11)
1. the surface treatment method of the micro-porous membrane of polyolefin, it is by making the first area contact liq of described polyolefin micro-porous membrane one side surface, positively charged or negative electricity after friction, so that the second area reversed polarity on described polyolefin micro-porous membrane surface of the opposite side relative with described first area is charged, control the charged distribution on described polyolefin micro-porous membrane two surface.
2. the surface treatment method of the micro-porous membrane of polyolefin according to claim 1, it is characterised in that after the friction of described first area when positively charged or negative electricity, described second area contacts with described liquid.
3. the surface treatment method of the micro-porous membrane of polyolefin according to claim 2, it is characterized in that, the micro-porous membrane of described polyolefin is made to be immersed in described liquid, when then extracting out from described liquid, make the described liquid liquid level in the described second area side liquid level higher than side, described first area, so that described first area friction after positively charged or negative electricity, make described second area reversed polarity charged.
4. the surface treatment method of the micro-porous membrane of polyolefin according to claim 3, it is characterised in that liquid level and the either side surface angulation of the micro-porous membrane of described polyolefin when described liquid stands are 5 °～85 °.
5. the surface treatment method of the micro-porous membrane of polyolefin according to any one of claim 1 to 4, it is characterised in that described liquid is at least one in water and aqueous solution that alcohol is below 20 percentage by weights.
6. a preparation method for the micro-porous membrane of polyolefin, it includes adopting the surface treatment method of the micro-porous membrane of polyolefin according to any one of Claims 1-4 to carry out surface treatment.
7. a surface treatment method for the micro-porous membrane of polyolefin, it makes at least one side surface contact surface tension polar solvent lower than 50mN/m of the micro-porous membrane of described polyolefin, eliminates the electrostatic on described polyolefin micro-porous membrane two surface.
8. the surface treatment method of the micro-porous membrane of polyolefin, after it utilizes the preparation method of the micro-porous membrane of the polyolefin described in claim 6 to eliminate electrostatic, the surface treatment method of the micro-porous membrane of polyolefin according to any one of claim 1 to 5 is adopted to control the charged distribution on described polyolefin micro-porous membrane two surface.
9. a surface Charging system for the micro-porous membrane of polyolefin, it possesses: solvent maintaining part, and it can keep liquid；
Delivery section, it can carry the micro-porous membrane of described polyolefin so that described solvent maintaining part can random time contact with two surfaces of the micro-porous membrane of described polyolefin；And
Liquid level adjustment portion, the liquid level that its at least one side surface adjusting the micro-porous membrane of described polyolefin contacts with described liquid, when making two surfaces at the micro-porous membrane of described polyolefin leave described solvent maintaining part, between regulation region and the region relative with described polyolefin micro-porous membrane surface of opposite side on described polyolefin micro-porous membrane surface of side, different from the time that described liquid separates.
10. the micro-porous membrane of polyolefin, it adopts the preparation method of the micro-porous membrane of the polyolefin described in claim 6 to be prepared from.
11. the micro-porous membrane of polyolefin according to claim 10, wherein, being wound on by micro-for described polyolefin porous membrane when making film rolling in film roll, each polyolefin micro-porous membrane surface reversed polarity of contact is charged relatively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-266953 | 2014-12-29 | ||
| JP2014266953A JP6380099B2 (en) | 2014-12-29 | 2014-12-29 | Surface treatment method for polyolefin microporous film, surface charging device and polyolefin microporous film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105733017A true CN105733017A (en) | 2016-07-06 |
| CN105733017B CN105733017B (en) | 2018-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510994189.5A Expired - Fee Related CN105733017B (en) | 2014-12-29 | 2015-12-25 | Surface treatment method, surface Charging system and the micro- porous membrane of polyolefin of the micro- porous membrane of polyolefin |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6380099B2 (en) |
| KR (1) | KR20160080073A (en) |
| CN (1) | CN105733017B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1232972A (en) * | 1967-05-23 | 1971-05-26 | ||
| GB1356284A (en) * | 1970-04-28 | 1974-06-12 | Agfa Gevaert Ag | Equalizing electric charges on non-conductive web materials |
| JPS62286728A (en) * | 1986-06-06 | 1987-12-12 | Suzuki Motor Co Ltd | Method of removing static electricity from resin molded product |
| JPH05166594A (en) * | 1991-12-11 | 1993-07-02 | Tokuyama Soda Co Ltd | Method for eliminating static electricity of flourine-containig resin |
| JP2006196255A (en) * | 2005-01-12 | 2006-07-27 | Toray Ind Inc | Discharge treatment device of sheet, discharge treatment method thereof and porous polyester film |
| CN102016727A (en) * | 2007-12-21 | 2011-04-13 | 3M创新有限公司 | Apparatus and methods for altering charge on a dielectric material |
| CN102153771A (en) * | 2010-11-12 | 2011-08-17 | 深圳市星源材质科技股份有限公司 | Polyolefin microporous membrane preparation method and use |
| WO2013084988A1 (en) * | 2011-12-07 | 2013-06-13 | 東レバッテリーセパレータフィルム株式会社 | Microporous membrane roll body and method of manufacturing same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5401446A (en) * | 1992-10-09 | 1995-03-28 | The University Of Tennessee Research Corporation | Method and apparatus for the electrostatic charging of a web or film |
| JPH1015812A (en) * | 1996-07-05 | 1998-01-20 | Toray Ind Inc | Charging suppressing method, and method and device for manufacturing object using the same |
| JP4617899B2 (en) | 2005-01-28 | 2011-01-26 | 東レ株式会社 | Electrically insulating sheet, method for removing electricity, and method for manufacturing the same |
| JP4583282B2 (en) | 2005-10-03 | 2010-11-17 | リンテック株式会社 | Touch roll unit and touch roll device |
| JP2009132507A (en) * | 2007-11-30 | 2009-06-18 | Toray Ind Inc | Charge applying roll, sheet roll body of electric insulating sheet and manufacturing method of electric insulating sheet |
| AU2010232847B2 (en) * | 2009-04-03 | 2012-09-27 | 3M Innovative Properties Company | Electret webs with charge-enhancing additives |
| JP5475541B2 (en) * | 2010-05-07 | 2014-04-16 | 日本バイリーン株式会社 | Charging filter and mask |
-
2014
- 2014-12-29 JP JP2014266953A patent/JP6380099B2/en not_active Expired - Fee Related
-
2015
- 2015-12-22 KR KR1020150183616A patent/KR20160080073A/en not_active Application Discontinuation
- 2015-12-25 CN CN201510994189.5A patent/CN105733017B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1232972A (en) * | 1967-05-23 | 1971-05-26 | ||
| GB1356284A (en) * | 1970-04-28 | 1974-06-12 | Agfa Gevaert Ag | Equalizing electric charges on non-conductive web materials |
| JPS62286728A (en) * | 1986-06-06 | 1987-12-12 | Suzuki Motor Co Ltd | Method of removing static electricity from resin molded product |
| JPH05166594A (en) * | 1991-12-11 | 1993-07-02 | Tokuyama Soda Co Ltd | Method for eliminating static electricity of flourine-containig resin |
| JP2006196255A (en) * | 2005-01-12 | 2006-07-27 | Toray Ind Inc | Discharge treatment device of sheet, discharge treatment method thereof and porous polyester film |
| CN102016727A (en) * | 2007-12-21 | 2011-04-13 | 3M创新有限公司 | Apparatus and methods for altering charge on a dielectric material |
| CN102153771A (en) * | 2010-11-12 | 2011-08-17 | 深圳市星源材质科技股份有限公司 | Polyolefin microporous membrane preparation method and use |
| WO2013084988A1 (en) * | 2011-12-07 | 2013-06-13 | 東レバッテリーセパレータフィルム株式会社 | Microporous membrane roll body and method of manufacturing same |
Non-Patent Citations (1)
| Title |
|---|
| 王良才: "简单高效的塑料静电消除法", 《塑料工业》 * |
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| Publication number | Publication date |
|---|---|
| JP6380099B2 (en) | 2018-08-29 |
| JP2016124983A (en) | 2016-07-11 |
| KR20160080073A (en) | 2016-07-07 |
| CN105733017B (en) | 2018-11-13 |
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