WO2003097212A1 - Feuille de fibres ouvree et unite de filtre - Google Patents
Feuille de fibres ouvree et unite de filtre Download PDFInfo
- Publication number
- WO2003097212A1 WO2003097212A1 PCT/JP2003/006232 JP0306232W WO03097212A1 WO 2003097212 A1 WO2003097212 A1 WO 2003097212A1 JP 0306232 W JP0306232 W JP 0306232W WO 03097212 A1 WO03097212 A1 WO 03097212A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fibrous sheet
- biodegradable
- filter unit
- shape
- reinforcing member
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0091—Including arrangements for environmental or personal protection
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/05—Methods of making filter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/31—Filter frame
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/39—Electrets separator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
- Y10T428/2969—Polyamide, polyimide or polyester
Definitions
- the present invention provides an electret fibrous sheet which is capable of biodegradation treatment and which can remove dust in the air with a low pressure loss, which is suitable for mounting on equipment requiring energy saving and low noise.
- the present invention relates to a molded fibrous sheet joined to a biodegradable shape reinforcing member, and an air cleaning filter unit formed by integrating a molded fibrous sheet with a biodegradable frame material.
- a molded fibrous sheet in which a separator such as a corrugated shape is incorporated in Patent Documents 1 and 2 and a comb-shaped separating material is incorporated in Patent Document 3 has been devised.
- separation materials used as conventional shape reinforcing members are metals such as aluminum and olefin-based, polyamide-based, synthetic rubber-based, and urethane-based resins. Since it is not decomposable, there is a problem that even if the fibrous sheet portion is decomposed, the reinforcing member is difficult to decompose.
- Patent Document 4 proposes a method in which a hot melt resin is cross-linked and fixed to the top of a pleated shape.
- the hot melt resin is a resin such as a copolymerized polyamide, an ethylene-vinyl acetate copolymer, or a polyolefin, and has a problem that it is not biodegradable like the above-mentioned separation material.
- non-combustible materials such as metals such as aluminum, olefin-based, polyamide-based, synthetic rubber-based, and urethane-based resins are used as the frame material for storing the molded fibrous sheet, and these frame materials are biodegradable. Therefore, even if the molded fibrous sheet is decomposed, the frame material is difficult to decompose.
- Patent Document 2 Japanese Patent Application Laid-Open No. Hei 199/1997
- the present invention is joined to a member that reinforces the shape of the electret fibrous sheet, and both are biodegraded.
- the biodegradable molded fibrous sheet having high dust removal performance with low pressure loss can be obtained by using a conductive material.
- the frame material can be used continuously, and only the molded fibrous sheet can be replaced.
- An object of the present invention is to provide a molded fibrous sheet and an air cleaning filter unit having high-performance characteristics and capable of reducing the burden on the environment. Disclosure of the invention
- the present invention has the following configuration.
- the present invention is a molded fibrous sheet characterized in that a shape reinforcing member made of a biodegradable material is joined to a biodegradable electret fibrous sheet.
- a preferred embodiment of the present invention is a molded fibrous sheet, wherein the biodegradable electret fibrous sheet has a pleated shape.
- the hot melt resin of the shape reinforcing member is
- a molded fibrous sheet characterized by having a softening point of 90 or more and a melting point of the fibrous sheet of 10 ⁇ or more in a measurement based on JIS-K-6863.
- a preferred embodiment of the present invention is characterized in that the resin plate of the shape reinforcing member uses polylactic acid in which the optical purity of optical isomers L-lactic acid and D-lactic acid is 70% ee or more. Formed fibrous sheet.
- a preferred embodiment of the present invention is a molded fibrous sheet characterized in that the biodegradable electret fibrous sheet is a fibrous sheet containing aliphatic polyester as a main component.
- the present invention provides a molded fibrous sheet characterized in that a shape reinforcing member made of a biodegradable material is joined to a biodegradable electret fibrous sheet.
- This is an air purifying filter unit that is integrated with a flexible frame material.
- the biodegradable electret fibrous sheet has a pleated shape, and is provided with an air purifying filter unit.
- the shape-reinforcing member of the biodegradable electret fibrous sheet subjected to the pleating process is made of a resin plate or a hot melt resin. It is.
- the hot-melt resin of the shape reinforcing member has a softening point of 90 t or more in a measurement based on JIS-K-6863 and a melting point of the fibrous sheet.
- An air purifying filter unit characterized by a temperature lower than 10 ° C.
- a preferred embodiment of the present invention is characterized in that the resin plate of the shape reinforcing member uses polylactic acid in which the optical purity of optical isomers L-lactic acid and D-lactic acid is 70% ee or more. It is a filter unit for cleaning air.
- a preferred embodiment of the present invention is a biodegradable electret fibrous sheet.
- a filter unit for air cleaning which is a fibrous sheet containing aliphatic polyester as a main component.
- the frame material for storing the biodegradable electret fibrous sheet is composed of at least two or four faces, and has higher rigidity than the biodegradable electret fibrous sheet. And a resin plate or a non-woven fabric.
- the frame material of the resin plate is a polymer obtained by mixing polylactic acid and polybutylene succinate or polybutylene succinate adipate at a weight ratio of 5: 1 to 1: 1. It is an air purifying filter unit featuring an air purifier.
- the biodegradable electret fibrous sheet used in the present invention contains an aliphatic polyester as a main component.
- the aliphatic polyester is preferably a thermoplastic resin mainly composed of polylactic acid and Z or polylactic acid.
- thermoplastic resins mainly composed of polylactic acid include lactic acid and cyclic lactones such as ⁇ -caprolactone, monohydroxybutyric acid, ⁇ -droxyisobutyric acid, and hydroxycarboxylic acids such as ⁇ -hydroxyvaleric acid, and ethylene.
- Glycols such as glycol, 1,4-butanediol and the like, and dicarboxylic acids such as co-octaic acid and sepatin acid, which are copolymerized with one or more kinds, can be used.
- the copolymer a random copolymer and / or a block copolymer can be used. Further, it is preferable to esterify the polymer molecular terminal with a compound having a carboxylic acid group at the molecular terminal, and thereby it is possible to improve the stability during thermoforming.
- the production method and form of the fibrous sheet are not particularly limited. However, spun-pound nonwoven fabric, spunlace nonwoven fabric, melt-blown nonwoven fabric or film-split nonwoven fabric is more preferable. Further, the cross section of the fiber may be of various shapes such as circular, triangular, rectangular, irregular, and the like.
- the fiber diameter can be 100 m or less, preferably 0.1 to 100 / _im, particularly preferably 0.5 to 70 m. This is because it is easy to manufacture and suitable for use as an air purifying filter.
- the basis weight of the sheet made of a fiber it can be used and l ⁇ 2 0 0 g / m 2, preferably having 5 ⁇ 1 0 0 g Zm 2, 1 0 ⁇ 5 0 g Zm 2 Are more preferred. This is because low pressure loss is possible, which is advantageous in terms of cost.
- Examples of the method of electretizing the above fibrous sheet, for example, a nonwoven fabric include corona charging, electric field charging, hot electric field charging, and electron beam irradiation, but are not limited thereto.
- Other charging methods may be used as long as the charge is stably held by the charge amount.
- corona charging or electric field charging an electric field strength of 10 kVZcm or more is preferable, and an electric field strength of lSkVZcm or more is more preferable.
- the irradiation is preferably performed at about 0.1 to 1 MRad.
- the biodegradable sheet is made of polylactic acid, aliphatic polyester, lactone resin, starch Z polyvinyl alcohol, polyhydroxylate, polyamino acid, polyamino acid, cellulose, etc. And a biodegradable sheet.
- an adhesive is used at the time of lamination, it is preferable to use a biodegradable adhesive. If the biodegradable sheet has a lower melting point than the electret fibrous sheet, it can be laminated by heat treatment without using an adhesive such as hot roll or hot embossing by utilizing the difference in melting point. You.
- a biodegradable electret fibrous sheet is joined to a shape maintaining member, and the shape of the biodegradable fibrous sheet includes a veneer shape and a pleated shape.
- a long sheet is preferred for the biodegradable electret fibrous sheet.
- the electretized fibrous sheet is bent at an appropriate interval in the longitudinal direction and formed into a pleated shape.
- the bending interval in the longitudinal direction is arbitrary, and can be determined according to the use, the thickness of the electret fibrous sheet, and the shape reinforcing member.
- the shape-reinforcing member of the biodegradable electret fibrous sheet has higher rigidity than a resin plate made of a biodegradable material, a molded product of the resin plate, a hot melt resin, and a biodegradable electret fibrous sheet.
- Biodegradable fibrous sheets and the like can be mentioned. It is effective to use aliphatic polyester as the main component of the resin plate for the shape reinforcing member, but it is also possible to use materials that have biodegradability and have the strength and workability equivalent to a resin plate. is there.
- the aliphatic polyester is preferably polylactic acid and / or a thermoplastic resin mainly composed of polylactic acid.
- thermoplastic resin mainly composed of polylactic acid
- lactic acid is converted into cyclic lactones such as ⁇ -force prolacton, ⁇ -hydroxy acids such as thiohydroxybutyric acid, ⁇ -droxyisobutyric acid, and hydroxy-1-valeric acid.
- Dalicols such as ethylene glycol, 1.4-butanediol, and dicarboxylic acids such as succinic acid and sebacic acid may be copolymerized with one or more dicarboxylic acids.
- the copolymer a random copolymer and / or a block copolymer can be used.
- the polymer molecule terminal is esterified with a compound having a carboxylic acid group at the molecular terminal, whereby the stability during thermoforming can be improved.
- Polylactic acid is a dehydrated polycondensate of lactic acid.
- High molecular weight polylactic acid can be easily obtained via lactide, which is a cyclic dimer of lactic acid.
- Lactic acid includes the optical isomers L-lactic acid and D-lactic acid. It is known that polylactic acid has different optical purity and different crystallinity depending on the ratio of L-form and D-form present in its molecular structure. Regarding the mechanical properties, the elastic modulus and elongation do not depend on the optical purity, but the strength tends to decrease as the optical purity decreases. The biodegradability also increases as the optical purity decreases.
- the thickness of the resin plate of the shape reinforcing member is related to the biodegradable rigidity, it is at least 0.1 mm, more preferably at least 0.2 mm. If it is less than 0.1 mm, the strength is insufficient and the shape reinforcement may be insufficient.
- the shape of the resin plate of the shape reinforcing member may be a wave shape, a comb shape, a linear shape, or the like.
- a corrugated separator is inserted between the pleats ( Figure 1), and a comb-shaped stabilizer is inserted between the pleats. (Fig. 2) and a method of bonding a linear molded liner to the top of the pleat.
- the biodegradable electret fibrous sheet is in the shape of a veneer, it is attached to four or two surrounding surfaces, the size of the veneer, and the strength of the biodegradable electret fibrous sheet. , Can be pasted inside other than the surrounding area.
- the resin plate is preferably stuck to the biodegradable electret fibrous sheet with a biodegradable adhesive.
- the biodegradable hot melt resin of the shape reinforcing member is, for example, aliphatic dicarboxylic acid, or an acid anhydride thereof, or an aliphatic dicarboxylic acid having an alkyl group or an alkenyl group in a side chain thereof, or an acid thereof. It is a composition containing an aliphatic polyester formed by a polycondensation reaction between an anhydride or a diester thereof and an aliphatic glycol in the presence of a catalyst.
- the resin itself has biodegradability and excellent adhesive properties.
- Methods for adjusting the softening point, viscosity, etc. of the hot melt resin include, for example, methods of controlling the molecular weight, selecting the type of wax to be used, and adjusting the mixing amount.
- Hot melt resins are generally heated at a temperature 20 or more above their softening point. It is melted and discharged from a nozzle or the like during application. At this time, the temperature of the melted hot melt resin drops by about 10 to 30 ° C. due to the adiabatic expansion effect of the discharge and the cooling effect until the application to the fiber sheet.
- the softening point of the hot melt resin is determined by using a hot melt resin at a temperature lower than the melting point of the biodegradable electret fibrous sheet by 10 ° C or more, when the hot melt resin is applied to the fiber sheet.
- the temperature of the melt resin can be lower than the melting point of the fiber sheet, thereby preventing the filter medium from melting due to the application of the hot melt resin.
- the amount of the hot melt resin is 1 to 10 gZm per one member for reinforcing the shape formed by applying the hot melt resin. If it is less than 1 g Z m, the role of the reinforcing member will be insufficient. On the other hand, when lOgZm is exceeded, the surface of the hot melt resin discharged from the nozzle is cooled by contact with air. However, the inside that does not come into contact with air has a small temperature drop and maintains a temperature higher than the melting point of the fiber sheet. For this reason, there is a possibility that the fibrous sheet may be melted when the hot melt resin is applied. Further, from such a condition of the amount of resin, it is desirable that the width of the resin applied in a linear shape is 0.5 mm or more and 5 mm or less.
- the softening point of the hot melt resin is less than 90, application can be performed without melting the biodegradable electret fibrous sheet, but the obtained molded fibrous sheet has poor heat resistance. Therefore, it is not preferable.
- the melt viscosity of the hot melt resin at 150 ° C. is preferably not less than 2000 centimeters to not more than 2000 centimeters, more preferably not less than 300 centimeters and not more than 150 centimeters. It is not more than 0 centimeters. If the melt viscosity is less than 2000 cmvoise, the applied hot melt resin spreads in a planar shape, and a separating material having a sufficient height cannot be obtained. Furthermore, the hot melt resin penetrates between the fibers of the fiber sheet and solidifies by cooling due to the capillary phenomenon, so that the air permeability of that part is lost and the pressure loss increases.
- the method of applying the hot-melt resin to the biodegradable electret fibrous sheet is to cross-link the tops of the pleats with the hot-melt resin (Fig. 3), and to apply a fixed interval to the biodegradable electret fibrous sheet.
- a method of applying a hot melt resin in the form of a bit see FIG. 4).
- the ply height is 10 Omm or less, preferably 6 Omm or less.
- the interval between the pleats is 2 to 20 mm, preferably 5 to: L0 mm. If the pleated interval is less than 2 mm, the biodegradable fibrous sheets are likely to adhere to each other. If it is larger than 20 mm, the crosslinks between the apexes will be fixed, and while the hot melt resin solidifies, it will hang down due to its own weight and will adhere not only to the pleated apex, but also to the pleated slope, and this part will be bonded. Heating may cause a decrease in electretizing properties and clogging of biodegradable electret fibrous sheets.
- the interval between the beat-like hot melt resins is preferably from 10 to 100 mm; ⁇ 5 Omm is more preferred.
- the thickness is less than 10 mm, the contact between the fibrous sheets can be reliably prevented by the bite-like hot-melt resin, but the area of the hot-melt resin applied to the fibrous sheet increases and the air permeability increases. As a result, the pressure loss as an air cleaning filter rises remarkably.
- the adjacent fibrous sheets come into contact with each other due to the pressure difference when the fluid passes through the fibrous sheets during use, and the pressure loss increases. More preferably, hot melt resin is not applied to a region that becomes a valley when the fibrous sheet is folded.
- the biodegradable fibrous sheet having higher rigidity than the biodegradable electret fibrous sheet is a polylactic acid-based, aliphatic polyester-based, lactone resin, starch / polyvinyl alcohol, or polyhydroxy resin. , Polyamino acid, cellulose And a biodegradable sheet having gas permeability such as a nonwoven fabric and a net.
- the stiffness of the biodegradable fibrous sheet is preferably 100 mm or more in a measurement based on JISL1096 “General woven fabric test method” stiffness A method. If it is less than 100 mm, the formed fibrous sheet may be deformed due to insufficient rigidity at high wind pressure.
- biodegradable adhesive When laminating a biodegradable fibrous sheet on a biodegradable electret fibrous sheet, if an adhesive is used, it is preferable to use a biodegradable adhesive. If the biodegradable sheet with electret fiber has a lower melting point, laminate it by a heat treatment that does not use an adhesive such as a hot roll or hot emboss, utilizing the difference in melting points. Is also possible.
- biodegradable frame material for accommodating the formed fibrous sheet examples include a resin plate and a nonwoven fabric made of a material having higher rigidity than the formed fibrous sheet.
- the resin plate of the frame material contains aliphatic polyester as a main component, but a material having biodegradability and having strength and workability equivalent to the resin plate can also be used.
- the aliphatic polyester is preferably a polylactic acid and / or a thermoplastic resin mainly composed of polylactic acid.
- the thermoplastic resin mainly composed of polylactic acid lactic acid can be converted into cyclic lactones such as ⁇ -caprolactone, ⁇ -hydroxybutyric acid, ⁇ -droxyisobutyric acid, ⁇ -hydroxy acids such as hydroxyvaleric acid, and ethylene.
- Glycols such as glycol and 1.4-butanediol, and dicarboxylic acids such as succinic acid and sebacic acid may be copolymerized with one or more kinds.
- the copolymer a random copolymer and / or a block copolymer can be used.
- Polylactic acid is a dehydrated polycondensate of lactic acid. High molecular weight polylactic acid can be easily obtained via lactide, which is a cyclic dimer of lactic acid.
- Lactic acid includes the optical isomers L-lactic acid and D-lactic acid. It is known that polylactic acid has different optical purity and different crystallinity depending on the ratio of L-form and D-form present in its molecular structure. Regarding mechanical properties, elastic modulus and elongation are optically pure. Although there is no degree dependence, the intensity tends to decrease as the optical purity decreases. The biodegradability also increases as the optical purity decreases. As a result of diligent studies, when polylactic acid with an optical isomer of L-lactic acid and D-lactic acid of 70% ee or more is used, it is equivalent to a member using conventional aluminum, wood, or ABS resin. The above strength was shown.
- polylactic acid Since polylactic acid has low impact resistance and heat resistance, there may be restrictions on the use environment and applications when commercializing various molded products.
- As a method for improving the impact resistance of polylactic acid it has been proposed to blend polyester elastomer, natural rubber, and styrene-butene copolymer, but from the viewpoint of biodegradability, biodegradability is considered.
- Polybutylene succinate and polybutylene succinate which are plastics and are aliphatic polyesters composed of diols and dicarboxylic acids, are opaque but have relatively low elastic modulus and excellent impact resistance. Although the blend of these and polylactic acid loses transparency, it is possible to improve the impact resistance while utilizing the high elasticity of polylactic acid.
- a polymer obtained by mixing polylactic acid and polybutylene succinate or polybutylene succinate adipate at a weight ratio of 5: 1 to 1: 1 was used as a frame material for storing the filter material and a member for reinforcing the filter material. When used, it exhibited strength equal to or higher than that of members using conventional aluminum, ABS resin, and wood. More preferably, a polymer obtained by mixing polylactic acid with polybutylene succinate or ribbutylene succinate adipate in a weight ratio of 4: 1 to 2: 1 is used as a frame material for accommodating the filter material and a member for reinforcing the filter material. Is to use.
- the weight ratio of polylactic acid is greater than 80% or less than 66%, its strength is lower than that of conventional aluminum, wood, and ABS resin frame materials, and biodegradable electric Originally to maintain the tret fibrous sheet shape, It cannot fulfill the function of the frame material.
- the thickness of the resin plate of the frame material is related to the biodegradable rigidity, it is 0.5 mm or more, more preferably 1 mm or more. If it is less than 0.5 mm, the strength is insufficient and the shape retention by the frame material may be insufficient.
- the resin plate of the frame material has a straight or U-shape and needs to be attached to at least two or four sides of the formed fibrous sheet. If the rigidity of the molded fibrous sheet is high, there is no problem in handling and the strength of the filter unit if two frames are attached, but usually the frame is installed on four sides. In order to stick the resin plate to the molded fibrous sheet, it is preferable to stick it with a biodegradable adhesive.
- Non-woven fabric of the frame material is made of polylactic acid, aliphatic polyester, lactone resin, starch / polyvinyl alcohol, polyhydroxy alcohol, polyamino acid, cellulose, etc. Sheet. Materials with strength and workability equivalent to resin plates can also be used.
- the rigidity of the fibrous nonwoven fabric may be low, and the rigidity can be increased by applying a biodegradable resin to the fibrous nonwoven fabric and drying.
- the softness of the nonwoven fabric that can be used for the frame material is preferably 200 mm or more in a measurement based on the JIS A1966 “General woven fabric test method” softness A method. If it is less than 200 mm, the formed fibrous sheet may be deformed due to insufficient rigidity at high wind pressure.
- the shape reinforcing member and the frame material are described above, respectively.
- a method of simultaneously forming the shape reinforcing member and the frame material there is an integral molding by injection molding.
- a biodegradable electret fiber sheet in the shape of a veneer or a pliable shape is mounted on a mold, the molten resin is poured into a gap between the molds, and cooled and solidified to form a biodegradable electret 1,
- the fibrous sheet and the frame material can be integrated. In this case, no adhesive is needed to join the two.
- the shape reinforcing member can be formed simultaneously with the production of the frame material. It is possible to manufacture only the shape reinforcing member.
- the test method of the filter used in this example is shown below.
- JISB 9 9 0 8 "Air Filter Unit ventilation", 8.1.2 based on the "pressure drop test” binomial, passes through the air 5 6 m 3 / min The pressure loss at this time was determined.
- a molded fibrous sheet and an air cleaning filter unit were manufactured to 100 mmX100 mmX60 mm, and placed in a composter (garbage disposal machine, “MAMJ” manufactured by Mitsui Home Co., Ltd.). After a day, the morphology (degree of decomposition) of the sample was visually observed and evaluated according to the following criteria.
- FIG. 1 A method of inserting corrugated separators between pleats.
- FIG. 5 is a schematic diagram of a method for applying a hot melt resin in a bite form.
- the electret fibrous sheet was pleated at a pre-width of 60 mm. Between each of the pleats, as a shape-reinforcing member, a 0.2 mm thick, corrugated separator made of polylactic acid with an optical purity of the optical isomers L-lactic acid and D-lactic acid of 70% ee A molded fibrous sheet to which evening was attached was produced.
- the Filu unit frame is a 2 mm thick resin frame made of polylactic acid with an optical purity of 70% ee of the optical isomers of L-lactic acid and D-lactic acid. Was bonded with an aliphatic dicarboxylic acid to produce an air cleaning filter unit.
- the electret fibrous sheet of Example 1 was pleated with a pre-width of 60 mm, and between the pleats, an optical isomer L —Lactic acid and D—Lactic acid with a purity of 70% ee Polylactic acid with a thickness of 2%, formed into a comb-shaped stabilizer with 10 pcs attached to each upstream and downstream in the air flow direction A fibrous sheet was produced. Thereafter, an air purifying filter unit was manufactured using the filter unit frame of Example 1.
- the electret fibrous sheet of Example 1 was pre-processed with a pleated width of 60 mm, and was used as a member for reinforcing the shape, with a hot spot of aliphatic dicarboxylic acid having a softening point of 144 and a melt viscosity of 580 CP.
- a molded fibrous sheet was prepared by applying the melted resin in a beat shape at an interval of 25.4 mm and an application amount of 1.5 g / m. Thereafter, an air purifying filter unit was produced using the filter unit frame of Example 1.
- the electret fibrous sheet of Example 1 was pleated with a pre-width of 60 mm, and as a shape reinforcing member, a hot spot of an aliphatic dicarboxylic acid having a softening point of 144 ⁇ and a melt viscosity of 580 CP was obtained.
- Formed fibrous sheets having 10 pleats cross-linked at the upstream and downstream sides in the direction of air flow at a coating amount of 7 g / m of the melt resin were prepared. Thereafter, a filter unit for air cleaning was manufactured using the filter unit frame of Example 1.
- the shape reinforcing member the fiber diameter 3 0 ⁇ m, basis weight 6 0 gZm 2, thickness 0. 4 mm, polylactic acid manufactured by spunbond nonwoven fabric embossed melting point 1 7 0 ° C, the aliphatic dicarboxylic acid 20 g / m 2 was impregnated and dried and solidified.
- the rigidity of the shape reinforcing member was 15 O mm.
- a molded electret fibrous sheet was obtained by laminating the shape reinforcing member and the electret fibrous sheet of Example 1 by embossing. The electret fibrous sheet was pleated with a pleat width of 6 Omm to produce a molded fibrous sheet. Thereafter, an air cleaning filter unit was manufactured using the filter unit frame of Example 1.
- the molded fibrous sheet of Example 5 was pleated with a pleat width of 60 mm, and was attached to an injection molding die. Then, the optical isomers of L-lactic acid and D-lactic acid are melted into polylactic acid with an optical purity of 70% ee.
- the thickness of the frame is 2 mm
- the thickness of the shape reinforcing member is 2 mm
- a gap is provided so that 10 combs are formed on the upstream and downstream sides of the filter, and the molten resin is poured into the gap, cooled and solidified, and a filter unit for air cleaning is formed by integral molding.
- the molded fibrous sheet was produced by injection molding a resin only on the shape reinforcing member.
- the resulting fiber diameter 2 5 xm, basis weight 4 0 g / m 2, thickness 0. 3 5 mm, a polypropylene spunbond nonwoven with embossed melting point 1 6 5 electronics column preparative reduction, the electronics tread bets fiber sheet was.
- the electret fibrous sheet was pleated with a pleat width of 60 mm.
- a hot melt resin of ethylene vinyl acetate copolymer having a softening point of 107 X: and a melt viscosity of 3400 CP was formed at intervals of 25.4 mm to produce a molded fibrous sheet having an application amount of 1.5 gZm.
- the filter unit frame was a 2 mm thick resin frame made of ABS resin, and the four sides of the molded fibrous sheet were bonded with polyethylene to produce a filter unit for air cleaning.
- Example 1 Except that the thickness of the shape reinforcing member of Example 1 was 0.05 mm, the same molded fibrous sheet and air cleaning filter unit as in Example 1 were produced.
- Example 2 The same molded fibrous sheet and air cleaning filter unit as in Example 2 were produced, except that the thickness of the shape reinforcing member of Example 2 was 0.05 mm.
- Example 4 The same molded fibrous sheet and air cleaning filter unit as in Example 3 were produced except that the hot melt resin interval of the shape reinforcing member of Example 3 was 110 mm and the coating amount was 12 g / m. did.
- Example 4 The same molded fibrous sheet and air cleaning filter unit as in Example 4 were produced except that the amount of hot melt resin applied to the shape reinforcing member of Example 4 was 12 gZm.
- a shape reinforcing member As a shape reinforcing member, a polylactic acid spun pound nonwoven fabric embossed with a fiber diameter of 30 im, a basis weight of 20 g / m 2 , a thickness of 0.15 mm, and a melting point of 170 X: An aromatic dicarboxylic acid was impregnated with 2 g / m 2 and dried and solidified. The rigidity of the shape reinforcing member was 70 mm. A molded electret fibrous sheet was obtained by laminating the shape reinforcing member and the electret fibrous sheet of Example 1 by embossing. The electret fibrous sheet was pleated with a pleat width of 60 mm.
- non-woven frame material As a non-woven frame material, a polylactic acid spun pound non-woven fabric embossed with a fiber diameter of 30 ⁇ ⁇ , a basis weight of 60 g / m 2 , a thickness of 0.4 mm, and a melting point of 170 ° C was used.
- the aliphatic dicarboxylic acid was impregnated with 20 gZm 2 and dried and solidified. The stiffness of this shape reinforcing member was 150 mm.
- Four sides of the molded fibrous sheet of Example 1 were bonded to a nonwoven frame material with an aliphatic dicarboxylic acid to prepare an air purifying filter unit.
- Example 7 The same molded fiber sheet and air-cleaning filter unit as in Example 7 were produced, except that the resin used in the injection molding of Example 7 was an ABS resin.
- Example 2 The filter unit frame was formed from ABS resin on the molded fibrous sheet. Using a 2 mm thick resin frame, the four surfaces of the molded fibrous sheet were bonded with polyethylene to produce an air cleaning filter unit. For the above-mentioned filter, the collection efficiency, pressure loss, and wind resistance were measured by the appearance and the method described above. Tables 1 and 2 show the results.
- the nonwoven fabric sheet does not simply increase the biodegradability, but also a high performance (low pressure loss, high dust removal performance) and a high performance in a form that the user actually uses in the air cleaning application. It is possible to provide a molded fiber-like sheet or an air cleaning filter unit that has decomposability and low reduction in environmental load.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Filtering Materials (AREA)
- Biological Depolymerization Polymers (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/515,277 US7364607B2 (en) | 2002-05-20 | 2003-05-19 | Wrought fiber sheet and filter unit |
EP03728104A EP1506804A4 (en) | 2002-05-20 | 2003-05-19 | OPEN FIBER SHEET AND FILTER UNIT |
AU2003234825A AU2003234825A1 (en) | 2002-05-20 | 2003-05-19 | Wrought fiber sheet and filter unit |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002144953 | 2002-05-20 | ||
JP2002-144953 | 2002-05-20 | ||
JP2002-170285 | 2002-06-11 | ||
JP2002170285 | 2002-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003097212A1 true WO2003097212A1 (fr) | 2003-11-27 |
Family
ID=29552312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/006232 WO2003097212A1 (fr) | 2002-05-20 | 2003-05-19 | Feuille de fibres ouvree et unite de filtre |
Country Status (5)
Country | Link |
---|---|
US (1) | US7364607B2 (ja) |
EP (1) | EP1506804A4 (ja) |
CN (1) | CN1309448C (ja) |
AU (1) | AU2003234825A1 (ja) |
WO (1) | WO2003097212A1 (ja) |
Cited By (1)
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WO2012032523A2 (en) | 2010-09-07 | 2012-03-15 | Regenera Pharma Ltd. | Compositions comprising acidic extracts of mastic gum |
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US7708813B2 (en) * | 2005-12-29 | 2010-05-04 | Environmental Management Confederation, Inc. | Filter media for active field polarized media air cleaner |
US8795601B2 (en) | 2005-12-29 | 2014-08-05 | Environmental Management Confederation, Inc. | Filter media for active field polarized media air cleaner |
US8252097B2 (en) * | 2005-12-29 | 2012-08-28 | Environmental Management Confederation, Inc. | Distributed air cleaner system for enclosed electronic devices |
US7691186B2 (en) * | 2005-12-29 | 2010-04-06 | Environmental Management Confederation, Inc. | Conductive bead active field polarized media air cleaner |
US9789494B2 (en) | 2005-12-29 | 2017-10-17 | Environmental Management Confederation, Inc. | Active field polarized media air cleaner |
US8814994B2 (en) | 2005-12-29 | 2014-08-26 | Environmental Management Confederation, Inc. | Active field polarized media air cleaner |
US7686869B2 (en) * | 2005-12-29 | 2010-03-30 | Environmental Management Confederation, Inc. | Active field polarized media air cleaner |
EP1973629B1 (en) * | 2006-01-12 | 2013-11-06 | Camfil Ab | Cleanable dust filter comprising a zigzag pleated filter pack |
EP2113276B1 (en) * | 2007-05-21 | 2012-08-15 | Covidien AG | Medical heat and moisture exchanger (HME) |
JP5608323B2 (ja) * | 2007-11-14 | 2014-10-15 | 日東電工株式会社 | フィルタ濾材とその製造方法ならびにフィルタユニット |
US8409336B2 (en) * | 2009-09-01 | 2013-04-02 | Hunter Fan Company | Air filter system |
EP2995642A3 (en) * | 2010-06-17 | 2016-06-15 | Tipa Corp. Ltd. | Biodegradable sheet comprising polylactic acid and polybutylene succinate adipate, and uses thereof |
DE102011014202A1 (de) * | 2011-03-16 | 2012-09-20 | Sandler Ag | Filtermedium für die Herstellung plissierter Filter |
CN103418185A (zh) * | 2012-05-22 | 2013-12-04 | 上海曾韩进出口有限公司 | 一种低压损过滤材料及其生产方法 |
AU2013276105B2 (en) | 2012-06-13 | 2016-08-18 | Tipa Corp. Ltd | Biodegradable sheet |
EP3283226A4 (en) | 2015-04-14 | 2018-12-05 | Environmental Management Confederation Inc. | Corrugated filtration media for polarizing air cleaner |
CN109477652B (zh) * | 2016-07-22 | 2020-09-22 | 三菱电机株式会社 | 空气净化装置及集尘过滤器 |
DE102017207137A1 (de) * | 2017-04-27 | 2018-10-31 | Mahle International Gmbh | Verfahren zur Herstellung eines Filterelementes |
JP7092124B2 (ja) * | 2017-06-09 | 2022-06-28 | 東洋紡株式会社 | 長繊維不織布およびそれを用いたフィルター補強材 |
CN109395472A (zh) * | 2018-10-26 | 2019-03-01 | 无锡风正科技有限公司 | 一种无胶线空气净化滤网 |
US12109520B2 (en) | 2019-01-21 | 2024-10-08 | 3M Innovative Properties Company | Multi-layer, biodegradable composites for air filtration |
CN110173785B (zh) * | 2019-05-30 | 2021-10-26 | 广东美的制冷设备有限公司 | 用于空气调节设备的加湿滤芯和空气调节设备 |
US11794142B2 (en) | 2019-11-05 | 2023-10-24 | Parker-Hannifin Corporation | Pulse cleanable deep pleated industrial filter |
GB2611044A (en) * | 2021-09-23 | 2023-03-29 | Dyson Technology Ltd | A biodegradable filter assembly for an electrical appliance |
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- 2003-05-19 AU AU2003234825A patent/AU2003234825A1/en not_active Abandoned
- 2003-05-19 EP EP03728104A patent/EP1506804A4/en not_active Withdrawn
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WO2012032523A2 (en) | 2010-09-07 | 2012-03-15 | Regenera Pharma Ltd. | Compositions comprising acidic extracts of mastic gum |
US9271949B2 (en) | 2010-09-07 | 2016-03-01 | Regenera Pharma Ltd. | Compositions comprising acidic extracts of mastic gum |
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Also Published As
Publication number | Publication date |
---|---|
US20050172812A1 (en) | 2005-08-11 |
CN1655860A (zh) | 2005-08-17 |
EP1506804A4 (en) | 2005-08-17 |
AU2003234825A1 (en) | 2003-12-02 |
CN1309448C (zh) | 2007-04-11 |
EP1506804A1 (en) | 2005-02-16 |
US7364607B2 (en) | 2008-04-29 |
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