WO2016157902A1 - Feuille poreuse hydrophile en plastique de poids moléculaire ultra-élevé et procédé de fabrication associé - Google Patents

Feuille poreuse hydrophile en plastique de poids moléculaire ultra-élevé et procédé de fabrication associé Download PDF

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Publication number
WO2016157902A1
WO2016157902A1 PCT/JP2016/001848 JP2016001848W WO2016157902A1 WO 2016157902 A1 WO2016157902 A1 WO 2016157902A1 JP 2016001848 W JP2016001848 W JP 2016001848W WO 2016157902 A1 WO2016157902 A1 WO 2016157902A1
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Prior art keywords
molecular weight
porous sheet
hydrophilic
weight plastic
high molecular
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English (en)
Japanese (ja)
Inventor
裕太 黒木
雅弘 新井
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Nitto Denko Corp
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Nitto Denko Corp
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Priority to CN201680019358.6A priority Critical patent/CN107428985A/zh
Priority to CN202311555504.5A priority patent/CN117700819A/zh
Priority to KR1020177025932A priority patent/KR102533590B1/ko
Publication of WO2016157902A1 publication Critical patent/WO2016157902A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/123—Treatment by wave energy or particle radiation
    • 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
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • 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
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • 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—Polyethylene
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/068—Ultra high molecular weight polyethylene

Definitions

  • the present invention relates to an ultrahigh molecular weight plastic porous sheet that is required to have hydrophilicity, air permeability and pure water absorption, and a method for producing the same.
  • the porous sheet of polyolefin resin particles is widely used in various filters and buffer materials for adsorption and fixing because of its excellent filtration function and permeability.
  • the hydrophilic polyethylene porous sheet is used for water absorption, retention, diffusion, permeation, etc. due to its hydrophilicity and water absorption, and a polyolefin sintered body described in Patent Document 1 has been developed. ing.
  • Such a hydrophilic polyethylene porous sheet has excellent dimensional stability, high mechanical strength, and moldability that can cope with complex shapes when it is absorbed by water. Applications are expected in many fields such as body.
  • An object of the present invention is to provide a hydrophilic porous sheet having high water absorption without introducing a substance having a hydrophilic functional group. Furthermore, an object of this invention is to provide the hydrophilic porous sheet which is excellent also in adhesive force. Another object of the present invention is to provide a simple method for producing the porous sheet.
  • the hydrophilic ultra high molecular weight plastic porous sheet of the present invention has an absorption rate of 15 mm / 3 min or more when one end of the sheet is immersed in pure water in an atmosphere of 25 ° C. and 60% RH, and has an ultra high molecular weight.
  • FT-IR infrared spectroscopy
  • the method for producing a hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention includes a step of performing antistatic treatment and / or plasma treatment on a porous sheet, and the porous sheet is made of ultrahigh molecular weight plastic.
  • the plasma treatment in the case of being configured and having an average pore diameter of less than 20.0 ⁇ m and not carrying out antistatic treatment is carried out in an oxygen gas atmosphere.
  • the present invention it is not necessary to introduce (for example, laminate) a substance having a hydrophilic functional group, and a hydrophilic ultrahigh molecular weight plastic porous sheet exhibiting high water absorption can be provided. Furthermore, this invention can provide the hydrophilic porous sheet which is excellent also in adhesive force. Further, by using the production method of the present invention, a porous sheet having improved pure water absorbability can be obtained easily.
  • the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention has an absorption rate of 15 mm or more per 3 minutes when one end of the sheet is immersed in pure water in an atmosphere of 25 ° C. and 60% RH. It is composed of plastic and is characterized in that no characteristic absorption is observed at 3000 to 3500 cm ⁇ 1 in an IR spectrum measured by infrared spectroscopy (FT-IR).
  • FT-IR infrared spectroscopy
  • the method for measuring the absorption rate is as described in the examples described later.
  • the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention can be used as a water-absorbing sheet, and the absorption speed when one end of the sheet is immersed in pure water in an atmosphere of 25 ° C. and humidity 60% RH is 20 mm / 3. Min. Or more, preferably 25 mm / 3 min. Or more, more preferably 30 mm / 3 min. Or more, particularly preferably 35 mm / 3 min. Or more, further particularly preferably 40 mm / 3 min. Or more, particularly preferably 45 mm / 3 min. Or more. 55 mm / 3 min or more is most preferable.
  • the adhesive strength of the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention is preferably 0.5 N / mm or more, more preferably 2.1 N / mm or more, and further preferably 2.5 N / mm or more.
  • the method for measuring the adhesive force is as described in Examples described later.
  • the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention preferably has an absorption rate of 15 mm / 3 min or more and an adhesive strength of 2.1 N / mm or more, and an absorption rate of 20 mm / 3 min. More preferably, the adhesive strength is 2.1 N / mm or more, more preferably the absorption rate is 25 mm / 3 minutes or more and the adhesive strength is 2.5 N / mm or more.
  • the ultra high molecular weight plastic constituting the hydrophilic ultra high molecular weight plastic porous sheet of the present invention is not particularly limited, and examples thereof include ultra high molecular weight polyethylene, ultra high molecular weight polypropylene, ultra high molecular weight polyvinyl chloride, and ultra high molecular weight polyamide.
  • Ultra high molecular weight polyethylene (hereinafter also referred to as UHMWPE) is preferable. These may be used individually by 1 type, and 2 or more types may be mixed and used for them. Moreover, these can use a commercial item.
  • Examples of commercially available high molecular weight plastics include ultra high molecular weight polyethylene such as Hi-Zex Million (Mitsui Chemicals), Sunfine UH, UTS (Asahi Kasei Chemicals), HIFAX 1000 (Hercules), and Hostalen GUR (Hoechst); Examples include ultra high molecular weight polyvinyl chloride such as TK2500 series (Shin-Etsu Chemical); ultra high molecular weight polyamide such as Daiamide (Daicel Chemical Industries).
  • Ultra high molecular weight polyethylene such as Hi-Zex Million (Mitsui Chemicals), Sunfine UH, UTS (Asahi Kasei Chemicals), HIFAX 1000 (Hercules), and Hostalen GUR (Hoechst)
  • Examples include ultra high molecular weight polyvinyl chloride such as TK2500 series (Shin-Etsu Chemical); ultra high molecular weight polyamide such as Daiamide (Daicel Chemical Industries).
  • the weight average molecular weight (Mw) (hereinafter, also simply referred to as average molecular weight) of the ultra high molecular weight plastic is not particularly limited, but is preferably 500,000 or more, more preferably 1,000,000 or more, and further preferably 1,500,000 or more. 2 million or more is particularly preferable.
  • the upper limit of the weight average molecular weight (Mw) is not particularly limited, but is preferably 15 million or less, more preferably 12 million or less, further preferably 9 million or less, and particularly preferably 8 million or less.
  • the weight average molecular weight is a value measured by a light scattering measurement method.
  • the ultra high molecular weight plastic porous sheet used as a material can be produced by a known method, for example, according to the methods described in JP-B-7-55541 and JP-A-2002-177390.
  • the ultra high molecular weight plastic powder is filled into a shape holder (such as a mold), and the plastic formed on the mold is sintered in a steam atmosphere heated to a temperature higher than the melting point of the plastic and then cooled.
  • a shape holder such as a mold
  • the plastic formed on the mold is sintered in a steam atmosphere heated to a temperature higher than the melting point of the plastic and then cooled.
  • the ultra high molecular weight plastic is ultra high molecular weight polyethylene
  • a predetermined dispersion containing ultra high molecular weight polyethylene powder or the like is prepared, and the dispersion is applied in a sheet form.
  • An ultra-high molecular weight plastic porous sheet can be produced by allowing it to cool to room temperature after performing a certain amount of
  • the ultra-high molecular weight plastic porous sheet used as a material may be manufactured using additives such as a dispersant and a thickener.
  • Nonionic surfactants include glycerin fatty acid ester and its alkylene glycol adduct, polyglycerin fatty acid ester and its alkylene glycol adduct, propylene glycol fatty acid ester and its alkylene glycol adduct, sorbitan fatty acid ester and its alkylene glycol adduct, Fatty acid ester of sorbitol and its alkylene glycol adduct, polyoxyethylene glycerin fatty acid ester, polyalkylene glycol fatty acid ester, sucrose fatty acid ester, glycerin alkyl ether, polyoxyalkylene alkyl ether, poly (oxyethylene) alkylphenyl ether, poly ( Oxyethylene) alkyl ether, polyoxyethylene hydrogenated castor oil, lanolin alkylene glycol Adducts, polyoxyethylene - polyoxypropylene block copo
  • the number of carbon atoms of the fatty acid in the nonionic surfactant exemplified above is preferably 12-18.
  • the HLB value of the nonionic surfactant is not particularly limited, but may be 12.5 or more. Further, the HLB value of the nonionic surfactant may be less than 15.0 or less than 14.5. These can use a commercial item.
  • Triton X-100 Triton X-100; HLB value 13.5, a kind of polyoxyethylene alkylphenyl ether, polyethylene glycol p- (1,1,3,3-tetramethylbutyl) -Including compounds such as phenyl ether; manufactured by Roche Applied Science).
  • the thickener is not particularly limited, but natural and synthetic clay minerals (including organically modified viscosity minerals) such as bentonite, montmorillonite, zauconite, nontronite, saponite, hectorite, vermiculite, synthetic hectorite; Plant thickeners such as gum, tragacanth and carrageenan; microbial thickeners such as xanthan gum; animal thickeners such as gelatin and sodium chondroitin sulfate; methylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, nitrocellulose, ethylcellulose, hydroxy Cellulose derivatives such as ethyl cellulose and hydroxypropycellulose; starch-based thickeners such as rice starch and wheat starch; Algi such as sodium alginate and propylene glycol alginate Acid thickener; polyvinyl alcohol, polyvinyl pyrrolidone, vinyl derivatives of polyvinyl acetate and the like; sodium polyacrylate, polyacryl
  • the hydrophilic ultra high molecular weight plastic porous sheet of the present invention may contain other resins as long as the ultra high molecular weight plastic is mainly constituted as long as the effects of the present invention are not hindered.
  • examples of such other resins include high-density polyethylene and low-density polyethylene.
  • the blending amount of such other resins is not particularly limited as long as the effect of the present invention is not hindered, but is preferably 10% by mass or less with respect to the entire hydrophilic ultrahigh molecular weight plastic porous sheet. 0.0 mass% or less is more preferable, and 1.0 mass% or less is more preferable.
  • the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention may contain other resins as long as the effects of the present invention are not hindered, but the resin material (plastic) is an ultrahigh molecular weight. What consists only of plastic is preferable.
  • the average pore size of the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention is less than 20.0 ⁇ m, preferably 3.0 to 18.0 ⁇ m, in view of obtaining higher water absorption after the plasma treatment.
  • the thickness is preferably 5.0 to 15.0 ⁇ m, more preferably 8.0 to 13.0 ⁇ m.
  • the average pore diameter of the porous sheet may be 1.0 ⁇ m or more, or 2.0 ⁇ m or more.
  • the average pore size in the present invention was determined by measuring the pore size distribution by the BJH method using a specific surface area / pore distribution measuring device ASAP2010 (manufactured by Shimadzu Corporation) by nitrogen adsorption / desorption method. Value.
  • the porosity of the hydrophilic ultra-high molecular weight plastic porous sheet of the present invention is more than 30% from the viewpoint that higher water absorption can be obtained after the plasma treatment when only the plasma treatment is performed without the antistatic treatment. % Or less, preferably 33 to 70%, more preferably 35 to 60%.
  • the porosity of the porous sheet is preferably more than 20% and not more than 70% from the viewpoint of obtaining higher water absorption after both treatments. 65% is more preferable, and 25 to 50% is more preferable.
  • the porosity in the present invention is due to open pores and does not include closed pores.
  • the thickness of the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention is not particularly limited, but is preferably about 5 to 500 ⁇ m, more preferably about 10 to 450 ⁇ m, further preferably about 50 to 400 ⁇ m, and about 80 to 350 ⁇ m. Particularly preferred.
  • the hydrophilic ultra high molecular weight plastic porous sheet of the present invention has a step of performing antistatic treatment and / or plasma treatment on the porous sheet of the material, and the porous sheet comprises the above ultra high molecular weight plastic.
  • the plasma treatment when the average pore diameter is less than 20.0 ⁇ m and the antistatic treatment is not performed is performed in an oxygen gas atmosphere, and the antistatic treatment is performed before or after the plasma treatment. Is carried out in an oxygen gas or argon gas atmosphere and can be produced by a production method.
  • the treatment performed on the porous sheet of the material is preferably performed only by plasma treatment without performing antistatic treatment; or, preferably, plasma treatment is performed before or after the antistatic treatment. .
  • the amount of oxygen gas introduced in the plasma treatment step when the antistatic treatment is not performed is not particularly limited as long as the effect of the present invention is obtained, but is preferably 10 to 100 sccm from the viewpoint of obtaining higher water absorption after the plasma treatment. 20 to 80 sccm is more preferable, and 30 to 50 sccm is more preferable.
  • the amount of oxygen gas or argon gas introduced in the plasma treatment step when performing the plasma treatment before or after the antistatic treatment is not particularly limited as long as the effect of the present invention can be obtained. ⁇ 600 sccm is preferred, 110 ⁇ 550 sccm is more preferred, 150 ⁇ 500 sccm is more preferred, and 200 ⁇ 480 sccm is particularly preferred.
  • the gas pressure in the plasma treatment step is not particularly limited, but higher water absorption can be obtained after performing the plasma treatment without the antistatic treatment and after performing the plasma treatment before or after the antistatic treatment. Therefore, 0.5 to 10 Pa is preferable, and 2.0 to 7.0 Pa is more preferable.
  • the product of the processing density (processing power [W] / processing area [cm 2 ]) and processing time ([sec]) can be adjusted using a high frequency power source of 5 to 15 MHz.
  • the product (processing energy) of the processing density and the processing time in the plasma processing step when performing the plasma processing before or after the antistatic treatment is 0.10 J / cm 2 or more and 10 J / cm from the point that higher water absorption is obtained. is preferably less than 2, more preferably 0.20 J / cm 2 or more 8.0J / cm 2 or less, more preferably 0.30J / cm 2 or more 5.0J / cm 2 or less, 0.35J / cm 2 or more 4. 0 J / cm 2 or less is particularly preferable.
  • Examples of the antistatic treatment include a method of coating the porous sheet with an antistatic agent.
  • the antistatic agent is not particularly limited, and examples thereof include a cationic surfactant, an anionic surfactant, an amphoteric surfactant, a nonionic surfactant, and the like.
  • a cationic surfactant, an anionic surfactant, Nonionic surfactants are preferred.
  • These antistatic agents may be used singly or in combination of two or more, but it is preferable not to use a cationic surfactant and an anionic surfactant together. It does not specifically limit as an antistatic agent of this invention, You may further contain additives, such as a ultraviolet absorber and a mold release agent.
  • the cationic surfactant used as the antistatic agent is not particularly limited, and alkyl ammonium acetates, alkyl dimethyl benzyl ammonium salts, alkyl trimethyl ammonium salts, dialkyl dimethyl ammonium salts, alkyl pyridinium salts, oxyalkylene alkyl amines, And oxyalkylene alkylamines.
  • the anionic surfactant used as the antistatic agent is not particularly limited, but includes fatty acid soda soaps such as sodium stearate soap, alkyl sulfates such as sodium lauryl sulfate, alphasulfo fatty acid ester salts, alkyl ether sulfates, alkylbenzene. Examples thereof include sodium sulfonates, sodium alkylnaphthalene sulfonates, dialkyl sulfosuccinates, alkyl phosphates, alkyl diphenyl ether disulfonates and the like.
  • zwitterionic surfactants used as antistatic agents include alkylcarboxybetaines.
  • nonionic surfactant used as the antistatic agent examples include the same as the above-described dispersant.
  • polyoxyethylene-polyoxypropylene block copolymer type nonionic surfactants such as Adeka (registered trademark) Pluronic L ⁇ P ⁇ F series and Adeka (registered trademark) Pluronic TR series; Adecatol LB series, Alkyl ether type nonionic surfactants such as Adecatol LA series and Adekatol TN series; ester type nonionic surfactants such as Adecanol NK (glyceride ethylene oxide adduct); special phenol type nonionic surfactants such as Adekatol PC; Sulfate-type anionic surfactant such as Adeka Hope series; Phosphate-type or succinate-type anionic surfactant such as Adekacol series; Quaternary cationic surfactant such as Adekamin series (Manufactured by KK ADEKA); Erekunon series (Dainich
  • the coating method is not particularly limited, and a known method can be adopted.
  • Coating methods include, for example, casting method, dipping method, roll coating method, gravure coating method, screen printing method, reverse coating method, spray coating method, kiss coating method, die coating method, metal ring bar coating method, coating method using a chamber doctor. , Curtain coating method, bar coating method and the like.
  • the temperature of the drying treatment is not particularly limited, but may be, for example, about 50 to 130 ° C. or about 60 to 110 ° C.
  • the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention hardly shows a characteristic absorption at 3000 to 3500 cm ⁇ 1 in an IR spectrum measured by infrared spectroscopy (FT-IR). This is because a hydrophilic functional group (OH group) is not introduced to the surface of the hydrophilic porous sheet (up to several tens of ⁇ m in the thickness direction from the surface) to the extent that it can be detected by infrared spectroscopy (FT-IR). That is, it means that the introduction amount of the hydrophilic functional group is extremely small.
  • FT-IR infrared spectroscopy
  • the present invention includes embodiments in which the above configurations are combined in various ways within the technical scope of the present invention as long as the effects of the present invention are exhibited.
  • Example 1 UHMWPE powder (weight average molecular weight 4.5 million) was mixed with water, a dispersant (trade name: Triton X-100 (Roche Applied Science)), and a thickener (carboxymethylcellulose sodium) to obtain a dispersion.
  • This dispersion was applied to a polyimide film (JIS B 0601: 2013 arithmetic average roughness Ra ⁇ 0.1) with an arbitrary thickness using a doctor blade. The dispersion applied on this film was put into a drier set at 180 ° C. and allowed to stand for 10 minutes.
  • the polyimide film laminate was taken out and naturally cooled to room temperature, and then the polyimide film on the back surface was peeled off from the laminate. Thereafter, the obtained sheet was washed with distilled water in an ultrasonic cleaning tank, and the dispersant was sufficiently extracted from the sheet to obtain a UHMWPE porous sheet having an average pore diameter of 10 ⁇ m and a porosity of 40%.
  • the obtained UHMWPE porous sheet was subjected to plasma treatment.
  • plasma treatment sputter etching treatment using high frequency plasma in the presence of O 2 gas was performed.
  • the sputter etching process was performed using a high frequency power source with an O 2 gas introduction amount of 30 sccm in the vacuum chamber and a gas pressure in the chamber of 3.6 Pa.
  • the product of the process density and treatment time performed treated with 30 J / cm 2, thereby to obtain a hydrophilic UHMWPE porous sheet.
  • Example 2 The sputter etching process using O 2 gas was performed in the same manner as in Example 1 except that the product of the process density and the process time was 10 J / cm 2 .
  • the obtained sheet was subjected to FT-IR measurement and water absorption evaluation in the same manner as in Example 1. The results are shown in Table 1.
  • Example 1 The ultrahigh molecular weight polyethylene porous sheet obtained in Example 1 was not subjected to plasma treatment. The obtained sheet was subjected to FT-IR measurement and water absorption evaluation in the same manner as in Example 1. The results are shown in Table 1.
  • Example 1 was performed except that Ar gas was used for the sputter etching process.
  • the obtained sheet was subjected to FT-IR measurement and water absorption evaluation in the same manner as in Example 1. The results are shown in Table 1.
  • Example 3 A hydrophilic UHMWPE porous sheet was obtained in the same manner as in Example 1 except that the antistatic treatment was performed on the UHMWPE porous sheet instead of performing the plasma treatment.
  • a UHMWPE porous sheet was coated with a cationic antistatic agent (cationic surfactant, trade name: Elecnon OR-W, manufactured by Dainichi Seika Kogyo Co., Ltd.) by dipping.
  • a cationic antistatic agent cationic surfactant, trade name: Elecnon OR-W, manufactured by Dainichi Seika Kogyo Co., Ltd.
  • deionized water was added to the cationic antistatic agent to prepare a 3% aqueous solution, and the obtained aqueous solution was coated on the porous sheet by dip coating and dried at 90 ° C. for 2 minutes.
  • the obtained hydrophilic UHMWPE porous sheet was subjected to FT-IR measurement and water absorption evaluation in the same manner as in Example 1. The results are shown
  • Example 4 As a material UHMWPE porous sheet, Sunmap LC-T (trade name, Nitto Denko Corporation) having an average pore diameter of 17 ⁇ m and a porosity of 30% was used. The sun map LC-T was subjected to antistatic treatment in the same manner as in Example 3. The obtained hydrophilic UHMWPE porous sheet was subjected to FT-IR measurement and water absorption evaluation in the same manner as in Example 1. The results are shown in Table 1.
  • Example 5 As a UHMWPE porous sheet of material, Sunmap LC-T was used as in Example 3. Plasma treatment was performed in the same manner as in Example 1 except that the conditions were changed as shown in Table 1 in Sunmap LC-T. Next, the obtained porous sheet was subjected to antistatic treatment in the same manner as in Example 4. Each hydrophilic UHMWPE porous sheet obtained was measured for FT-IR and evaluated for water absorption in the same manner as in Example 1.
  • Example 7 to 8 As a UHMWPE porous sheet of material, Sunmap LC-T was used in the same manner as in Example 3 for antistatic treatment. Subsequently, the obtained porous sheet was subjected to plasma treatment in the same manner as in Example 1 except that each condition was changed as described in Table 1. Each hydrophilic UHMWPE porous sheet obtained was measured for FT-IR and evaluated for water absorption in the same manner as in Example 1.
  • the hydrophilic ultrahigh molecular weight plastic porous sheet of the present invention has high water absorption, particularly in the case of a hydrophilic ultrahigh molecular weight plastic porous sheet using ultrahigh molecular weight polyethylene, and has high water absorption and is derived from polyethylene. Therefore, it can be used as a humidifier element such as a battery separator or an air conditioner, or an ink absorber of a printer, which is required to retain liquid water.

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  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention vise à fournir une feuille poreuse hydrophile ayant une forte capacité d'absorption d'eau. La présente invention vise, en outre, à fournir une feuille poreuse hydrophile ayant aussi une excellente force d'adhérence. La présente invention vise également à fournir un procédé simple pour la fabrication de la feuille poreuse. La présente invention concerne une feuille poreuse hydrophile en plastique de poids moléculaire ultra-élevé caractérisée en étant conçue à partir d'une matière plastique de poids moléculaire ultra-élevé ayant un taux d'absorption d'au moins 15 mm/3 minutes lorsqu'une extrémité d'une feuille de cette dernière est plongée dans de l'eau pure dans une atmosphère à 25 ° C et 60 % d'humidité relative, une caractéristique d'absorption étant observée à 3 000-3 500 cm-1 dans le spectre IR de cette dernière mesuré par spectroscopie infrarouge (FT-IR).
PCT/JP2016/001848 2015-03-31 2016-03-30 Feuille poreuse hydrophile en plastique de poids moléculaire ultra-élevé et procédé de fabrication associé Ceased WO2016157902A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680019358.6A CN107428985A (zh) 2015-03-31 2016-03-30 亲水性超高分子量塑料多孔片及其制造方法
CN202311555504.5A CN117700819A (zh) 2015-03-31 2016-03-30 亲水性超高分子量塑料多孔片及其制造方法
KR1020177025932A KR102533590B1 (ko) 2015-03-31 2016-03-30 친수성 초고분자량 플라스틱 다공질 시트 및 그의 제조 방법

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Application Number Priority Date Filing Date Title
JP2015072667 2015-03-31
JP2015-072667 2015-03-31

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WO2016157902A1 true WO2016157902A1 (fr) 2016-10-06

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JPH09278928A (ja) * 1996-04-09 1997-10-28 Nitto Denko Corp 機能性多孔質樹脂フィルム及びその製造法
US20020176946A1 (en) * 2001-04-10 2002-11-28 O'brien Jeffrey J. Porous plasma treated sheet material
JP2009128818A (ja) * 2007-11-27 2009-06-11 Funai Electric Advanced Applied Technology Research Institute Inc エレクトロクロミック表示デバイス
JP2010075081A (ja) * 2008-09-25 2010-04-08 Nitto Denko Corp 細胞シート搬送治具
WO2013180071A1 (fr) * 2012-05-31 2013-12-05 日東電工株式会社 Diaphragme pour électrolyse d'eau alcaline
JP2013249510A (ja) * 2012-05-31 2013-12-12 Nitto Denko Corp アルカリ水電解用隔膜

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TW201710402A (zh) 2017-03-16
TWI687473B (zh) 2020-03-11
JP6736326B2 (ja) 2020-08-05
CN117700819A (zh) 2024-03-15
JP2016194065A (ja) 2016-11-17
CN107428985A (zh) 2017-12-01
KR102533590B1 (ko) 2023-05-18

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