WO2010053087A1 - 成形品の製造方法、及び熱交換用膜エレメント - Google Patents
成形品の製造方法、及び熱交換用膜エレメント Download PDFInfo
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- WO2010053087A1 WO2010053087A1 PCT/JP2009/068815 JP2009068815W WO2010053087A1 WO 2010053087 A1 WO2010053087 A1 WO 2010053087A1 JP 2009068815 W JP2009068815 W JP 2009068815W WO 2010053087 A1 WO2010053087 A1 WO 2010053087A1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14631—Coating reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14795—Porous or permeable material, e.g. foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14827—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using a transfer foil detachable from the insert
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14836—Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/14—Filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0015—Heat and mass exchangers, e.g. with permeable walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
Definitions
- the present invention relates to a method of attaching a film to a resin frame, and preferably relates to a technique for manufacturing a heat exchange membrane element by attaching a moisture permeable film to a resin frame.
- a heat exchange membrane element composed of a heat exchange membrane and a resin frame for supporting the membrane is used (Patent Document 1, etc.).
- 1 (a) and 1 (b) are schematic perspective views of a membrane element introduced as a prior art in Patent Document 1 and a total heat exchanger using this membrane element.
- FIG. 2 (a) 2 (b) and FIG. 2 (c) are schematic perspective views of a membrane element introduced as an example of the invention of Patent Document 1 and a total heat exchanger using the membrane element.
- the heat exchange membrane element 41 includes a heat exchange membrane 11 and a resin frame 21, which are manufactured separately.
- a plurality of rod-shaped spacers (ribs) 31 that are parallel to each other are formed in the resin frame 21, and a portion (parallel portion) 25 that is parallel to the rod-shaped spacers of the frame 21 is also the same as (or that of) the rod-shaped spacer 31.
- the thickness is as described above.
- the total heat exchanger 51 can be formed by alternately stacking the resin frames 21 and the heat exchange membranes 11 while changing the direction of the parallel portions 25 (and the bar-shaped spacers 31). In the total heat exchanger 51, the supply air passage and the exhaust passage are separated by the parallel portion 25, and the total heat exchange can be performed between the supply air and the exhaust via the heat exchange membrane 11. Yes.
- a pair of heat exchange membrane elements 42a and 42b including the first and second are used, and the total heat exchanger 52 is formed by alternately laminating them.
- the first heat exchange membrane element 42a is composed of the heat exchange membrane 11 and a resin frame 22a formed integrally therewith.
- a plurality of bar-shaped spacers (ribs) 32a that are parallel to each other are formed on one side of the heat exchange film 11, and a plurality of bar-shaped spacers (ribs) 33a that are also parallel to each other are formed on the opposite side of the heat exchange film 11.
- the spacer 32a on one side and the spacer 33a on the opposite side are orthogonal to each other.
- a portion (parallel portion A) 26a parallel to the rod-shaped spacer 32a on one side of the frame 22a is formed to have a thickness similar to (or more than) the parallel rod-shaped spacer 32a.
- a portion (parallel portion B) 27a parallel to the bar-shaped spacer 33a on the opposite surface side is also formed to have a thickness similar to (or more than) the parallel bar-shaped spacer 33a.
- the second heat exchange membrane element 42b also has the same structure as the first heat exchange membrane element 42a.
- the spacer of the second heat exchange membrane element 42b is formed with a second engaging portion 34b for positioning.
- the second engagement portion 34b is also the same as the first heat exchange membrane element 42a.
- the supply air passage and the exhaust passage are separated by the parallel portions 26 a, 26 b, 27 a and 27 b, and the total heat is supplied between the supply air and the exhaust via the heat exchange membrane 11. It can be exchanged.
- Patent Document 1 Japanese plastic films and metal foils cannot be used as a total heat exchange membrane because the humidity (latent heat) cannot be exchanged even if the temperature (sensible heat) can be exchanged.
- Patent Document 2 also discloses a paper base material.
- the paper base material has an advantage that the latent heat exchange rate is high, but has low condensation durability, and if the condensation freezes, the total heat exchange membrane (paper) may be broken.
- a porous resin film such as a stretched porous polytetrafluoroethylene film is also used.
- the porous resin film has excellent condensation durability.
- Patent Document 3 an example in which a porous resin film is used as it is is disclosed, but if a porous resin film is attached to a frame as shown in Patent Document 1 and used as a membrane element. It is expected that the heat exchanger can be easily assembled. However, it is not easy to attach the frame to the porous resin film.
- Patent Document 4 discloses a molten plastic on the peripheral side of the polytetrafluoroethylene porous membrane.
- An injection molding method for permeating and condensing is disclosed.
- What is manufactured in Patent Document 4 is a method for manufacturing a ventilation filter having a very small membrane area, which may be about 1 cm in diameter, and this method cannot be applied to a heat exchange membrane having a large membrane area.
- the porous resin film may shrink due to heat during the injection molding of the frame. Further, the porous resin film is also washed away by the resin pressure of the injection molding, so that the film shape is broken or the film is broken.
- Patent Document 5 relates to a hollow type gas-liquid separation element, and has a frame shape different from that of a flat membrane type heat exchange membrane element, but the membrane area is the same as that of a flat membrane type heat exchange membrane. Since it is large, insert molding is performed after the nonwoven fabric is laminated on the porous resin film.
- the porous resin film when attaching a porous resin film having a large area to the frame, the porous resin film had to be reinforced with a nonwoven fabric or the like. However, when the reinforcing layer is laminated, the latent heat exchange rate of the porous resin film is lowered.
- the present invention has been made paying attention to the circumstances as described above, and its purpose is to establish a technique capable of sticking (integral molding) the film to a frame body independently of the size of the film. There is.
- a preferred object of the present invention is to provide a heat exchange membrane element having excellent condensation durability and latent heat exchange characteristics (moisture permeability characteristics).
- the present inventors have reinforced a film by previously laminating a solvent-soluble or solvent-disintegrating reinforcing layer on the film, and injection-molding a frame on the film After that, the present inventors have found that if the reinforcing layer is removed with a solvent, the film can be independently attached (integrated molding) to the frame regardless of the film area, and the present invention has been completed.
- the manufacturing method of a molded product in which a film is pasted on a resin frame according to the present invention includes 1) reinforcing a film with a solvent-soluble or solvent-disintegrating reinforcing layer, and 2) reinforcing the injection mold. 3) Insert a film (that is, a laminate of a film and a reinforcing layer), 3) supply a resin to the mold and paste the frame body onto the laminate while injection molding, and 4) the resulting injection molded body. Is treated with a solvent to remove the reinforcing layer.
- a preferred film is a stretched porous polytetrafluoroethylene film, and more preferably a moisture-permeable resin is combined with the stretched porous polytetrafluoroethylene film.
- the moisture-permeable resin examples include a urethane resin, a crosslinked polyvinyl alcohol, and a fluorine ion exchange resin.
- the thickness of the film is, for example, about 0.5 to 100 ⁇ m.
- the reinforcing layer may be formed of, for example, water-soluble fibers, such as a molded article of polyvinyl alcohol fiber, or paper formed of pulp fibers finely dispersed in water. There may be.
- the film-reinforcing layer laminate is inserted between a pair of injection molds, and both molds are provided with frame part forming cavities and are used for forming these frame parts. It is desirable that the mold surface inside the cavity is engraved.
- the present invention also includes a heat exchange membrane element in which a stretched porous polytetrafluoroethylene film is singly attached to a resin frame by integral molding.
- the film can be attached to the frame alone (integral molding). If a molded product that can be manufactured in this way is used for an element for a heat exchange membrane, it is possible to achieve both condensation durability and latent heat exchange characteristics (moisture permeability characteristics).
- FIG. 1 is a schematic perspective view showing an example of a frame shape that can be manufactured by the present invention.
- FIG. 2 is a schematic perspective view showing another example of a frame shape that can be manufactured by the present invention.
- FIG. 3 is a schematic sectional view showing an example of a mold used in the present invention.
- FIG. 4 is a schematic sectional view showing an example of the production method of the present invention.
- FIG. 5 is a schematic perspective view showing an example of a molded product that can be produced by the present invention.
- FIG. 3A is a schematic sectional view of a pair of injection molds used in the present invention as seen from the side
- FIG. 3B is a front view of one mold.
- the cross-sectional view of FIG. 3A corresponds to a cut surface taken along line II ′ of FIG. 4 is a cross-sectional view showing an insert molding procedure using the mold of FIG. 3
- FIG. 5 (a) is a schematic perspective view showing the front side of the molded product obtained by the method of FIG. b) is a schematic perspective view showing the back side of the molded product.
- a reinforcing film (laminated film) 16 obtained by laminating and bonding the film 12 with a solvent-soluble or solvent-disintegrating reinforcing layer 15 is inserted between a pair of injection molds 61 and 71 (FIG. 4).
- 4 (a) after being fixed to the mold by appropriate means (pins, vacuuming, etc.), the resin for forming the frame 23 is injected from one mold 61 and pasted to the reinforcing film 16 (FIG. 4).
- B) After demolding (FIG. 4C), the reinforcing layer 15 is removed by treatment with a solvent (FIG. 4D).
- the resin supply port 64 is formed in one mold 61, but the resin may be supplied from both molds 61 and 71. Further, in the molds 61 and 71, the mold surfaces 63 and 73 inside the frame body forming cavities 64 and 74 are engraved, and a space between the cavities 64 and 74 and the engraved parts (recesses) 63 and 73 is engraved.
- the film pressing portions 62 and 72 are formed by protruding in a peak shape. By forming the engraving parts (recesses) 63 and 73, the film 12 can be prevented from coming into contact with the mold, and thermal damage to the film 12 can be prevented.
- the engraved portions (recessed portions) 63 and 73 are not essential, and the height of the engraved portions (recessed portions) 63 and 73 may be the same as that of the film pressing portions 62 and 72 to hold the film in a planar shape.
- the film 12 is suitable for the application of the molded product 43 (for example, a filter (including a vent filter), a gas-liquid separation membrane, a dehumidifying membrane, a humidifying membrane, a pervaporation membrane, a heat exchange membrane, an ion exchange membrane, etc.).
- a film based on a porous resin particularly stretched porous polytetrafluoroethylene is preferred.
- Porous resins, particularly stretched porous polytetrafluoroethylene films are extremely soft and easy to stretch, and shrink easily due to heat, so it is very difficult to insert-mold them as they are. However, it can be attached to the frame by integral molding alone.
- a porous resin may be used as the film 12 as it is.
- the porous resin may be used as it is as the film 12, but for example, a moisture-permeable resin may be used as the porous resin film.
- the combined composite film is used as film 12.
- a moisture-permeable resin is preferably laminated on the porous resin film, and more preferably, the moisture-permeable resin is filled in the porous space in the porous film together with or instead of the lamination.
- the average pore diameter and porosity of the porous resin film are appropriately set according to the use of the molded product.
- the average pore diameter is, for example, 0.05 to It is about 10 ⁇ m, preferably about 0.1 to 5 ⁇ m, and the porosity is, for example, about 30 to 97%, preferably about 50 to 95%, and more preferably about 70 to 90%.
- the average pore diameter is a value obtained from the pore distribution (volume distribution with respect to the pore diameter). That is, the pore distribution was measured on the assumption that all the pores of the porous resin film were cylindrical, and the pore diameter corresponding to the intermediate value of the pore volume was determined as the average pore diameter. In the present invention, the average pore size was determined using a Coulter Porometer manufactured by Coulter Electronics.
- the thickness when the volume V is calculated is based on an average thickness measured with a dial thickness gauge (measured with “SM-1201” manufactured by Teclock Co., Ltd. in a state where no load other than the main body spring load is applied).
- Porosity (%) [1 ⁇ (D / Dstandard)] ⁇ 100
- moisture-permeable resin to be combined with the porous resin film examples include, for example, urethane resin, polystyrene sulfonic acid, polyvinyl alcohol cross-linked product (for example, cross-linked product of mixed solution of glutaraldehyde and HCl, cross-linked product of formaldehyde, blocked).
- Cross-linked products such as isocyanate), vinyl alcohol copolymers (ethylene-vinyl alcohol copolymers, tetrafluoroethylene-vinyl alcohol copolymers), fluorine-based ion exchange resins (“Nafion (registered trademark)” manufactured by DuPont), Asahi Glass Resin having a protic hydrophilic group in the repeating unit such as ion exchange resin such as “Flemion (registered trademark)” manufactured by Co., Ltd., divinylbenzenesulfonic acid copolymer, divinylbenzenecarboxylic acid copolymer, etc.
- ion exchange resin such as “Flemion (registered trademark)” manufactured by Co., Ltd., divinylbenzenesulfonic acid copolymer, divinylbenzenecarboxylic acid copolymer, etc.
- moisture-permeable resins can be used alone or in combination of two or more.
- Preferred moisture-permeable resins are urethane resins, crosslinked polyvinyl alcohol, fluorine ion exchange resins, and the like.
- the term “film” 12 is defined as a layer other than the reinforcing layer 15.
- a single-layer film particularly a porous resin film
- a plurality of films particularly porous resin films
- These “single layer” or “laminated film” are also included in the “film” 12 of the present invention.
- a preferred film 12 is a monolayer film which may be filled with a moisture permeable resin, or a laminate of a moisture permeable resin on a single layer film.
- the thickness of the film 12 is, for example, about 0.5 ⁇ m to 100 ⁇ m, preferably about 5 ⁇ m to 50 ⁇ m, and more preferably about 7 ⁇ m to 30 ⁇ m. Area also the film 12 is, for example, 4 cm 2 ⁇ 10000 cm 2 or so, preferably from 10 cm 2 ⁇ 5000 cm 2 or so, more preferably 100 cm 2 ⁇ 3000 cm 2 approximately.
- the reinforcing layer 15 is laminated and bonded to the film 12, but can be laminated by various methods as long as the reinforcing layer 15 can reinforce the film 12.
- the reinforcing layer 15 may be laminated to the film 12 by heat fusion. Good.
- the method of laminating and bonding the film 12 and the reinforcing layer 15 or laminating and fusing is not particularly limited. For example, after the film 12 and the reinforcing layer 15 are laminated, the film 12 and the reinforcing layer 15 are passed through a hot roll and thermally fused. Also good.
- the reinforcing layer 15 is not particularly limited as long as it is solvent-soluble or solvent-disintegrable and can reinforce the film 12 (laminate reinforcement).
- a solvent-soluble or solvent-disintegratable material for example, sheets (including foam sheets), knitted fabrics, woven fabrics, non-woven fabrics, nets, etc.), solvent-resistant fibers, solvent-soluble or solvent-disintegrating materials
- Solvent-soluble or solvent-disintegrating materials and solvent-resistant fibers can be used in various ways depending on the type of solvent (for example, water, organic solvent, acid, alkali, etc.).
- examples of the solvent-soluble or solvent-disintegrating sheet molded article include polyvinyl alcohol sheets and starch sheets (such as wafers).
- examples of solvent-soluble or solvent-disintegrating fiber molded products include molded products of polyvinyl alcohol fibers (for example, “Solbron (trade name)” manufactured by Aicello Chemical Co., Ltd., Kuraray Co., Ltd. “Kuraron K-II”, etc.); Examples thereof include paper formed from pulp fibers that are finely dispersed in water (for example, “water-soluble paper (trade name)” manufactured by Nippon Paper Industries Co., Ltd.).
- examples of the solvent-soluble or solvent-disintegrating adhesive material include polyvinyl alcohol and starch paste.
- examples of the solvent durable fiber include polyester fiber, polyethylene fiber, polypropylene fiber, and nylon fiber. Even when other solvents are used, the solvent-soluble or solvent-disintegrating materials and solvent-resistant fibers can be appropriately selected from known materials.
- the shape of the frame body 23 can also be appropriately designed according to the use of the molded product 43.
- the molded product 43 when used as a heat exchange membrane molded body, as shown in FIGS. 1 and 2, a frame body in which a plurality of spacers are formed on one side or both sides of the film 12 may be formed.
- the portion of the frame that is parallel to the spacer is usually approximately the same (or greater) thickness as the spacer.
- the resin is injected from the molds on both sides of the film 12.
- Example 1 Dot-shaped urethane adhesive on a moisture-permeable film obtained by coating a stretched porous polytetrafluoroethylene film with an average pore size of 0.2 ⁇ m, porosity of 80%, and thickness of 20 ⁇ m with a moisture-permeable urethane resin at a coating amount of 8 g / m 2.
- a polyvinyl alcohol non-woven fabric manufactured by Shinwa Co., Ltd., trade name “9040-E” was laminated and adhered.
- An ABS resin frame was formed by setting the heat-laminated film on a vertical injection molding machine (model: TH100R12VSE) manufactured by Nissei Plastic Industry Co., Ltd. and insert molding.
- the molding conditions were pre-drying: 3 hours, 90 ° C., cylinder setting temperature: 240 ° C., screw rotation speed: 90 rotations / minute, back pressure: 20 MPa, mold temperature: 60 ° C.
- the injection molded body was immersed in water at a temperature of 25 ° C. for 5 minutes, and then rinsed with running water to obtain a molded article in which a moisture permeable film was attached to the resin frame alone.
- Comparative Example 1 In the same manner as in Example 1, insert molding was performed. The polyvinyl alcohol nonwoven fabric laminated on the moisture permeable film was left without being removed with running water. The moisture permeability of the molded products obtained in Example 1 and Comparative Example 1 was measured according to JIS L1099A-1 method (conditions: 25 ° C., 75% RH). Three measurements were taken and the average value was determined. The results are shown in Table 1.
- the molded product of Example 1 Compared with the molded product of Comparative Example 1, the molded product of Example 1 has high moisture permeability, which is comparable to the moisture permeability of the moisture permeable film before heat lamination of the polyvinyl alcohol nonwoven fabric.
- the molded product 43 manufactured according to the present invention has a filter (including a vent filter), a gas-liquid separation membrane, a dehumidifying membrane, a humidifying membrane, and a vaporization membrane by appropriately changing the material of the film 12 and the shape of the frame body 23. It can be used for various applications such as heat exchange membranes and ion exchange membranes.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
本発明の好ましい目的は、結露耐久性と潜熱交換特性(透湿特性)に優れた熱交換用膜エレメントを提供することにある。
本発明には、延伸多孔質ポリテトラフルオロエチレンフィルムが単独で樹脂製枠体に一体成形によって貼設されている熱交換用膜エレメントも含まれる。
図3(a)は本発明で使用する一対の射出成型用金型を側方から見た概略断面図であり、図3(b)は片方の金型の正面図である。なお図3(a)の断面図は図3(b)のI-I’線での切断面に相当する。図4は、図3の金型を用いたインサート成形手順を示す断面図であり、図5(a)は図4の方法で得られた成形品の正面側を示す概略斜視図、図5(b)は前記成形品の背面側を示す概略斜視図である。
空孔率(%)=[1-(D/Dstandard)]×100
フィルム12と補強層15を積層接着したり、積層融着したりする方法は特に限定されないが、例えば、フィルム12と補強層15とを積層した後、熱ロールに通して、熱融着してもよい。
他の溶剤を使用する場合にも、溶剤可溶性又は溶剤崩壊性の材料や溶剤耐久性繊維は、公知の材料から適宜選択できる。
平均孔径0.2μm、空孔率80%、厚さ20μmの延伸多孔質ポリテトラフルオロエチレンフィルムに透湿性ウレタン樹脂を塗布量8g/m2でコーティングした透湿性フィルムにウレタン系接着剤をドット状に転写し、ポリビニルアルコール製不織布((株)シンワ製、商品名「9040-E」)を積層して接着した。
実施例1と同様にして、インサート成形した。透湿性フィルムに積層されたポリビニルアルコール製不織布は、流水で除去することなくそのままにした。
実施例1及び比較例1で得られた成形品の透湿性を、JIS L1099A-1法に準拠して測定した(条件:25℃、75%RH)。3回測定し、その平均値を求めた。結果を表1に示す。
15 補強層
16 補強されたフィルム
23 樹脂製枠体
61、71 射出成形金型
43 成形品
Claims (9)
- 樹脂製枠体にフィルムを貼設した成形品の製造方法であって、
フィルムを溶剤可溶性又は溶剤崩壊性の補強層で補強し、
射出成形金型に前記補強されたフィルムを挿入し、
前記金型に樹脂を供給して枠体を射出成形しつつ前記補強されたフィルムに貼り付け、
得られた射出成形体を溶剤で処理して前記補強層を除去することを特徴とする成形品の製造方法。 - 前記フィルムが延伸多孔質ポリテトラフルオロエチレンフィルムである請求項1に記載の成形品の製造方法。
- 透湿性樹脂が前記延伸多孔質ポリテトラフルオロエチレンフィルムと複合化されている請求項2に記載の成形品の製造方法。
- 前記透湿性樹脂がウレタン樹脂、ポリビニルアルコールの架橋体、及びフッ素系イオン交換樹脂から選択される少なくとも一種である請求項3に記載の成形品の製造方法。
- 前記フィルムの厚さが、0.5~100μmである請求項1~4のいずれかに記載の成形品の製造方法。
- 前記溶剤が水であり、前記補強層が水溶性繊維で形成されている請求項1~5のいずれかに記載の成形品の製造方法。
- 前記溶剤が水であり、前記補強層がポリビニルアルコール系繊維の成形体、又は水中で微細分散するパルプ繊維から形成された紙である請求項1~5のいずれかに記載の成形品の製造方法。
- 補強層で補強された前記フィルムが一対の射出成形型用金型の間に挿入されており、これら両金型には枠体部形成用キャビティが形成されていると共に、これら枠体部形成用キャビティよりも内側の金型面が彫り込まれている請求項1~7のいずれかに記載の製造方法。
- 延伸多孔質ポリテトラフルオロエチレンフィルムが単独で樹脂製枠体に一体成形によって貼設されている熱交換用膜エレメント。
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KR101419584B1 (ko) | 2014-07-15 |
CN102232015B (zh) | 2014-07-23 |
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