WO2012091003A1 - 紙微粉体含有樹脂成形体及びその製造方法 - Google Patents
紙微粉体含有樹脂成形体及びその製造方法 Download PDFInfo
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- WO2012091003A1 WO2012091003A1 PCT/JP2011/080195 JP2011080195W WO2012091003A1 WO 2012091003 A1 WO2012091003 A1 WO 2012091003A1 JP 2011080195 W JP2011080195 W JP 2011080195W WO 2012091003 A1 WO2012091003 A1 WO 2012091003A1
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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
- B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
- B29K2311/12—Paper, e.g. cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/06—Vegetal particles
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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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1372—Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
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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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
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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
- 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
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249981—Plural void-containing components
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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
- 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
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249986—Void-containing component contains also a solid fiber or solid particle
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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
- 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
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249988—Of about the same composition as, and adjacent to, the void-containing component
- Y10T428/249989—Integrally formed skin
Definitions
- the present invention relates to a resin molded body containing fine paper powder and a method for producing the same.
- the paper fine powder-containing resin molded product can reduce the amount of thermoplastic resin by containing the paper fine powder, and if it contains a predetermined amount or more of the paper fine powder, Can be incinerated.
- the thermoplastic resin has a problem that the higher the ratio containing the paper fine powder, the lower the fluidity in the molten state, and it is difficult to perform injection molding as it is depending on the manufacturing conditions such as the shape of the molded body. is there.
- JP 2009-28523 A Japanese Patent Laid-Open No. 2001-270958
- injection molding is performed by adding the paper fine powder to a molten thermoplastic resin composition such as polyethylene or polypropylene and impregnating a supercritical fluid under pressure. It is possible. According to the above technique, since the fluidity of the molten thermoplastic resin composition can be improved by impregnating the supercritical fluid, even if the paper fine powder content of the thermoplastic resin is high. Injection molding can be performed regardless of manufacturing conditions such as the shape of the molded body.
- the thermoplastic resin impregnated with the fluid in the supercritical state is injected into the cavity, when the pressure drops below the critical pressure of the fluid, the fluid foams and the obtained paper A foamed layer composed of fine bubbles is formed inside the fine powder-containing resin molded body.
- the obtained paper fine powder-containing resin molding has the foamed layer formed therein and the non-foamed layer formed on the surface.
- the volume of the cavity is expanded to reduce the pressure of the thermoplastic resin composition, and the fluid is actively foamed. It is conceivable to further reduce the weight of the obtained paper fine powder resin molding.
- the present invention provides a paper fine powder-containing resin molded product that can eliminate such disadvantages, reduce the weight of the thermoplastic resin, reduce the weight, and have excellent mechanical strength, and a method for producing the same. With the goal.
- the present invention provides a paper fine powder-containing resin molded article comprising a non-foamed layer formed on the surface and a foamed layer formed inside, comprising a thermoplastic resin containing fine paper powder.
- the paper fine powder-containing resin molded body contains 1 to 400 parts by mass of paper fine powder having an average particle diameter in the range of 25 to 200 ⁇ m with respect to 100 parts by mass of the thermoplastic resin.
- a first foam layer composed of bubbles having an average pore diameter in the range of 10 to 100 ⁇ m
- a second foam layer composed of bubbles having an average pore diameter in the range of 5 to 50 ⁇ m, and 20 to 500 ⁇ m.
- a third foamed layer made of bubbles having an average pore diameter in the range of.
- the paper fine powder-containing resin molding of the present invention can reduce the amount of the thermoplastic resin by including paper fine powder having an average particle diameter in the above range in the above range.
- the paper fine powder-containing resin molded body of the present invention can be reduced in weight by providing the first to third foamed layers, and can have an excellent mechanical strength by preventing the enlargement of bubbles. Obtainable.
- the combustion calories of the resin composition can be reduced, and incineration can be performed as general waste.
- the paper fine powder is not preferable because a special device is required to make the average particle diameter less than 25 ⁇ m. On the other hand, when the average particle size of the paper fine powder exceeds 200 ⁇ m, it is difficult to mix the paper fine powder with the thermoplastic resin.
- the paper fine powder-containing resin molded body of the present invention has a sufficient effect of reducing the resin amount of the thermoplastic resin when the content of the paper fine powder is less than 1 part by mass with respect to 100 parts by mass of the thermoplastic resin. Since it cannot be obtained, it is not preferable. On the other hand, if the content of the paper fine powder exceeds 400 parts by mass with respect to 100 parts by mass of the thermoplastic resin, it is difficult to mix the paper fine powder with the thermoplastic resin, which is not preferable.
- the thermoplastic resin may be one resin selected from the group consisting of polyethylene, polypropylene, polyester, polylactic acid, thermoplastic elastomer, polystyrene, and ABS resin. Can be used.
- the paper fine powder may be, for example, one or more types of used paper selected from the group consisting of newspaper, magazine, wrapping paper, cardboard, and OA paper.
- a pulverized product can be used.
- a resin molded body made of a thermoplastic resin which is used for furniture, a frame of an electrical appliance, etc., and has a function of feeling a fragrance
- a resin molded body containing a scented component is known. ing. It is expected that the scented component is recognized as a scent by the user by releasing the scented component.
- the resin molded body As the resin molded body, there has been proposed a resin molded body made of a foam having open cells capable of exposing a scented component to an external atmosphere (see, for example, Patent Document 2).
- the resin molded body provided with the open cells maintains the scent because the scented component is released very quickly when the scented component is exposed to the external atmosphere through the open cell. I can't.
- the paper fine powder-containing resin molded product preferably contains a scented component.
- the scented component is held in the bubbles of the foam layer.
- the scented component held in the first foam layer close to the surface moves to the outside through the non-foamed layer, whereby the scented component is released.
- maintained at the 3rd foam layer far from the surface moves to the 1st foam layer near the surface, and discharge
- the third foamed layer is provided with bubbles having an average pore diameter of 20 to 500 ⁇ m larger than that of the first foamed layer, so that a large amount of the scented component can be held in the bubbles.
- the second foam layer existing between the third foam layer and the first foam layer has bubbles with an average pore diameter of 5 to 50 ⁇ m smaller than that of the first foam layer. The movement of the scented component being held to the first foamed layer can be suppressed.
- the paper fine powder-containing resin molded article of the present invention containing a scented component, it is possible to continuously release the scented component to the outside over a long period of time, providing excellent scent sustainability. Obtainable.
- examples of the perfumed component include hinokitiol, troponoid, ⁇ -tyaprisin, ⁇ -tyaprisin, ⁇ -drabrin, and monoterpene.
- Hydrocarbons monoterpene alcohols, phenols, phenol methyl ethers, sexterpene hydrocarbons, sexterpene alcohols, ketones, lactones, carboxylic acids, diterpene alcohols, aldehydes, esters, oxides, ammonia, acetic acid, butyric acid , Isovaleric acid, amino acid, organic acid, catechin, and at least one selected from the group consisting of fatty acids can be used.
- the paper fine powder-containing resin molded body of the present invention is a flooring material, furniture, electrical appliance frame, automobile interior parts, bathtub lid, toilet wall material, kitchen material, beverage tableware, various tableware other than beverages. , Containers, packages, hollow bodies, cold parisons, simulated fishing baits, insect repellent containers, stationery, and one type of molded body selected from the group consisting of files.
- the paper fine powder-containing resin molded body of the present invention is preferably a beverage tableware whose inner surface is roughened by the paper fine powder.
- the beverage tableware comprising the resin fine powder-containing resin molded body of the present invention has at least an inner surface roughened by the fine paper powder contained therein, and has fine irregularities. Then, when carbonated beverages such as beer are poured into the beverage tableware, fine bubbles can be generated on the surface of the beverage tableware, and a creamy taste can be obtained.
- the method for producing a paper fine-powder-containing resin molded body of the present invention comprises a paper fine powder having an average particle diameter in the range of 25 to 200 ⁇ m and a range of 1 to 400 parts by mass with respect to 100 parts by mass of the thermoplastic resin in a molten state.
- a paper fine powder-containing thermoplastic resin composition, and a supercritical fluid is added to the paper fine powder-containing thermoplastic resin composition of the paper fine powder-containing thermoplastic resin composition.
- the paper fine powder containing resin molding of this invention can be manufactured advantageously.
- a paper fine powder having an average particle diameter in the range of 25 to 200 ⁇ m is added to 1 to 400 parts by mass with respect to 100 parts by mass of a molten thermoplastic resin.
- a paper fine powder-containing thermoplastic resin composition is formed by mixing in a range.
- the paper fine powder-containing thermoplastic resin composition is impregnated with a fluid in a supercritical state under pressure in the range of 0.05 to 2% by mass of the paper fine powder-containing thermoplastic resin composition.
- the impregnation amount of the fluid in the supercritical state is less than 0.05% by mass of the thermoplastic resin composition containing paper fine powder
- the paper fine powder-containing thermoplastic resin composition is provided with sufficient fluidity for injection molding. I can't. If the amount of impregnation of the fluid in the supercritical state exceeds 2% by mass of the paper fine powder-containing thermoplastic resin composition, generation of enormous bubbles cannot be prevented in the obtained resin molding.
- a paper fine powder-containing thermoplastic resin composition impregnated with a fluid in a supercritical state is injected into a cavity having a predetermined shape.
- the paper fine powder-containing thermoplastic resin composition reaches the maximum pressure not less than the critical pressure of the supercritical fluid in the cavity, and then the paper fine powder-containing thermoplastic resin composition.
- the pressure gradually decreases.
- the paper fine powder-containing thermoplastic resin composition while the temperature L T is thermoplastic resin glass transition temperature Tg higher than the temperature obtained by adding 70 ° C. to (L T> Tg + 70 °C ) Maintains fluidity. Therefore, when the pressure becomes equal to or lower than the critical pressure of the fluid in the supercritical state, the fluid is foamed to start forming bubbles, and the first foamed layer is formed.
- the pressure of the paper fine powder-containing thermoplastic resin composition injected into the cavity becomes less than the critical pressure of the fluid
- the volume of the cavity is expanded, and the paper fine powder-containing thermoplastic resin
- the pressure of the composition is reduced at a first rate that is greater than the pressure reduction rate associated with a decrease in temperature of the paper fine powder-containing thermoplastic resin composition.
- bubbles having an average pore diameter smaller than that of the first foamed layer are formed in the first foamed layer, A second foam layer with bubbles is formed.
- the volume of the cavity is further expanded, and the pressure of the paper fine powder-containing thermoplastic resin composition is reduced at a second speed smaller than the first speed.
- the 2nd speed should just be smaller than the 1st speed, and may be larger or smaller than the pressure reduction speed accompanying the temperature fall of the above-mentioned paper fine powder containing thermoplastic resin composition. If it does in this way, in the paper fine powder containing thermoplastic resin composition still holding fluidity, the bubble in the 3rd foam layer inside the 2nd foam layer will grow, and the 1st foam Bubbles having an average pore size larger than that of the layer are formed.
- the temperature of the paper fine powder-containing thermoplastic resin composition becomes a temperature equal to or lower than the temperature obtained by adding 70 ° C. to the glass transition temperature Tg of the thermoplastic resin (L T ⁇ Tg + 70).
- Tg glass transition temperature
- carbon dioxide or nitrogen can be used as the fluid in the supercritical state.
- the paper fine powder-containing resin molding of the present invention comprises a step of mixing the perfumed component before impregnating the molten thermoplastic resin with the fluid in the supercritical state. Is preferred.
- the paper fine powder-containing resin molded product of the present invention containing a scented component is advantageously produced by providing the step of mixing the scented component. can do.
- Explanatory sectional drawing which shows the structure of the paper fine powder containing resin molding of this invention.
- Explanatory sectional drawing which shows one structural example of the injection molding apparatus used for manufacture of the paper fine powder containing resin molding of this invention.
- the graph which shows the manufacturing method of the paper fine powder containing resin molding of this invention.
- a paper fine powder-containing resin molded body 1 of this embodiment shown in FIG. 1 is made of a thermoplastic resin containing fine paper powder, and includes a non-foamed layer 2 formed on the surface and a foamed layer 3 formed inside. I have.
- the foam layer 3 further includes, in order from the side closer to the surface, the first foam layer 3a, the second foam layer 3b having bubbles having an average pore diameter smaller than that of the first foam layer, and the first foam layer. It is comprised from the 3rd foaming layer 3c provided with a bubble with a bigger average hole diameter.
- the first foam layer 3a has bubbles with an average pore diameter of 10 to 100 ⁇ m
- the second foam layer 3b has bubbles with an average pore diameter of 5 to 50 ⁇ m
- the third foam layer 3c includes bubbles having an average pore diameter of 20 to 500 ⁇ m.
- the average diameter of the bubbles in the foam layer 3 can be obtained, for example, by observing the cross section of the paper fine powder-containing resin molded body 1 with an electron microscope and determining the average value of the maximum diameters of the bubbles.
- thermoplastic resin constituting the paper fine powder-containing resin molded body known ones can be used, and examples thereof include polyethylene, polypropylene, polyester, polylactic acid, thermoplastic elastomer, polystyrene, and ABS resin. Can do.
- the paper fine powder contained in the paper fine powder-containing resin molded article finely pulverized materials made of various used papers such as newspaper, magazines, wrapping paper, cardboard, OA paper and the like can be used.
- the paper fine powder may be finely pulverized using raw paper such as broken paper or damaged paper generated during the production of virgin paper, magazines, books, cutting waste, shredder waste, and the like.
- the paper fine powder needs to have an average particle size in the range of 25 to 200 ⁇ m, preferably in the range of 30 to 75 ⁇ m, in order to be uniformly mixed with the thermoplastic resin in the molten state.
- Such a paper fine powder is obtained by pulverizing the raw materials, for example, various used papers using a coarse crusher such as a roll crusher, a hammark crusher, a cutter mill, etc., and using a first vertical roller mill, an average particle size of 50 ⁇ m or more and 150 ⁇ m. It can be obtained by finely pulverizing to an average particle size of 25 ⁇ m or more and less than 50 ⁇ m using a second vertical roller mill.
- a coarse crusher such as a roll crusher, a hammark crusher, a cutter mill, etc.
- the paper fine powder-containing resin molded body 1 is in the range of 1 to 400 parts by weight, preferably in the range of 30 to 150 parts by weight of the paper fine powder having the average particle diameter in the above range with respect to 100 parts by weight of the thermoplastic resin. Including.
- the paper fine powder-containing resin molded body 1 can be reduced in weight by reducing the amount of resin, and can have excellent mechanical strength and excellent heat insulation effect. Moreover, when it contains the paper fine powder more than predetermined amount, the combustion calorie of this resin composition can be reduced, and it becomes possible to incinerate as a general waste.
- the appearance of the paper fine powder-containing resin molded body 1 can be changed depending on the content of the paper powder, from the appearance that is almost the same as that of a normal resin molded body to the one that has a texture of paper material. It is. Accordingly, the paper fine powder-containing resin molded body 1 is, for example, a flooring material, furniture, a frame of an electrical appliance, an automobile interior part, a bathtub lid, a toilet wall material, a kitchen member, a tableware for beverages, and various types of tableware other than for beverages. , Containers, packages, hollow bodies, cold parisons, simulated bait for fishing, insect repellent containers, stationery, files, etc.
- the paper fine powder-containing resin molded body 1 can be a beverage tableware whose inner surface is at least roughened by the paper fine powder.
- the beverage tableware may be a container for carbonated beverages such as beer, for example, in the shape of a cup, glass or the like.
- the beverage container has at least an inner surface roughened by the fine paper powder contained therein, and has fine irregularities.
- carbonated beverages such as beer are poured into the beverage tableware comprising the paper fine powder-containing resin molded body 1
- fine bubbles can be generated on the surface of the beverage tableware, and a creamy taste can be obtained. it can.
- the beverage tableware only needs to have at least an inner surface roughened, but the outer surface may also be roughened, and in this case, a soft tactile sensation can be obtained when gripped. .
- the paper fine powder-containing resin molded body 1 can be manufactured using, for example, an injection molding apparatus 11 shown in FIG.
- the cylinder 12 includes a rotary shaft 15 that is rotationally driven by a motor 14, a hopper 16 that supplies thermoplastic resin and fine paper powder, and a supercritical fluid supply unit 17 that supplies a fluid in a supercritical state. It has.
- the hopper 16 is provided near the end of the cylinder 12 opposite to the mold 13, and the supercritical fluid supply unit 17 is provided near the center of the cylinder 12 on the downstream side of the hopper 16.
- the supercritical fluid supply unit 17 includes a supercritical fluid generator 18 that generates a fluid in a supercritical state, and a fluid conduit 19 that transports the supercritical fluid generated by the supercritical fluid generator 18 toward the cylinder 12. And a metering device 20 interposed in the middle of the fluid conduit 19.
- the fluid conduit 19 is connected to the cylinder 12 via a shut-off valve 21.
- the cylinder 12 is provided with a nozzle 22 at the tip on the mold 13 side and a plurality of heating devices 23a on the outer peripheral surface.
- the nozzle 22 includes a heating device 23 b on the outer peripheral surface, and is connected to the mold 13 through a shut-off valve 24.
- the rotary shaft 15 is connected to the motor 14 at the end opposite to the mold 13, and has a spiral screw 25 provided on the outer peripheral surface, and a screw head provided at the most distal end on the mold 13 side. 26.
- the screw 25 includes a proximal end side continuous screw 25a, a discontinuous screw 25b, and a distal end side continuous screw 25c.
- the proximal-side continuous screw 25a is provided from the end on the motor 14 side through the lower part of the hopper 16 to the front of the lower part of the supercritical fluid supply part 17.
- the discontinuous screw 25 b is provided at a lower portion of the supercritical fluid supply unit 17 and includes a plurality of discontinuous portions along the circumferential direction of the rotating shaft 15.
- the distal-side continuous screw 25 c is provided between the discontinuous screw 25 b and the screw head 26.
- the mold 13 includes a fixed die 28 having a concave portion 27 shaped along the outer shape of the paper fine powder-containing resin molded body 1, and a movable die 31 having a convex portion 30 fitted into the concave portion 27 to form a cavity 29. Consists of.
- the fixed mold 28 includes a sprue 32 communicating with the cylinder 12 and a runner 34 communicating with the sprue 32 and communicating with the cavity 29 via the gate 33.
- the movable mold 31 includes a support base 35 that supports the convex portion 30 and a piston rod 36 that moves the support base 35 forward and backward in the direction of the cavity 29.
- the piston rod 36 is connected to an external drive source such as a cylinder (not shown).
- the injection molding apparatus 11 moves the convex portion 30 toward the cavity 29 by the piston rod 36 via the support base 35. You can move forward and backward. As a result, the volume of the cavity 29 can be expanded (core back) by retracting the protrusion 30 with respect to the cavity 29, and the volume of the cavity 29 can be increased by moving the protrusion 30 forward with respect to the cavity 29. Can be reduced (core push).
- thermoplastic resin is charged from the hopper 16 into the cylinder 12.
- the thermoplastic resin is melted by being stirred by the continuous screw 25a while being heated by the heating device 23a in the cylinder 12 to form a molten resin.
- the input amount of the paper fine powder is, for example, in the range of 1 to 400 parts by mass, and preferably in the range of 30 to 150 parts by mass with respect to 100 parts by mass of the thermoplastic resin.
- the fine paper powder may be mixed with the thermoplastic resin in advance to form pellets, and the pellets may be put into the cylinder 12 from the hopper 16.
- pellets for example, “MAPKA / MAPKA (registered trademark)” or “pulp rack” (manufactured by Environmental Management Research Institute Co., Ltd.) can be used.
- the paper fine powder is uniformly mixed with the molten resin by stirring with a continuous screw 25a under the heating of the heating device 23a in the cylinder 12, and the paper fine powder-containing thermoplastic resin composition (hereinafter referred to as melted state) is obtained.
- the paper fine powder-containing thermoplastic resin composition hereinafter referred to as melted state
- the paper fine powder-containing molten resin formed as described above is conveyed in the direction of the mold 13 by the continuous screw 25a.
- a supercritical fluid in a range of 0.05 to 2% by mass of the paper fine powder-containing molten resin is supplied from the supercritical fluid supply unit 17, and the paper fine powder-containing molten resin is impregnated under pressure.
- Carbon dioxide or nitrogen can be used as the fluid.
- the fluid in the supercritical state is stirred by a discontinuous screw 25b provided in a lower portion of the supercritical fluid supply unit 17, and is sufficiently mixed with the molten resin containing paper fine powder and impregnated.
- a discontinuous screw 25b provided in a lower portion of the supercritical fluid supply unit 17, and is sufficiently mixed with the molten resin containing paper fine powder and impregnated.
- the fluid in the supercritical state is impregnated with the molten resin containing paper fine powder.
- the molten resin containing fine paper powder is in a state in which the core for foaming is not formed.
- the paper fine powder-containing molten resin impregnated with the fluid in the supercritical state is injected from the nozzle 22 into the cavity 29 through the sprue 32, runner 34, and gate 33.
- the cavity 29 has a predetermined volume as the convex portion 30 is advanced by a predetermined amount.
- Temperature L T of the paper fine powder-containing molten resin as shown in FIG. 3, after being injected into the cavity 29, but until passage of a predetermined time to rise, turns thereafter lowered.
- the pressure L p of the paper fine powder-containing molten resin is once increased with increasing the temperature exceeds the critical pressure Pc. However, after the temperature starts to decrease, the pressure L p of the paper fine powder-containing molten resin also starts to decrease.
- the paper fine powder-containing molten resin while a temperature L T is a temperature higher than the temperature obtained by adding 70 ° C. to a glass transition temperature Tg of the thermoplastic resin (L T> Tg + 70 °C ) retaining fluidity is doing. Therefore, when the pressure L p of the paper fine powder-containing molten resin becomes lower than the critical pressure Pc at time t 1 shown in FIG. 3, the impregnated supercritical fluid becomes a non-supercritical state and generates bubbles.
- the first foam layer 3a is formed in the paper fine powder-containing molten resin that still retains fluidity.
- the non-foamed layer 2 is formed in a portion in contact with the inner wall of the cavity 29 of the molten resin containing paper fine powder.
- the convex portion 30 is retracted from the cavity 29 by a predetermined amount via the support base 35 by the piston rod 36.
- volume of the cavity 29 is expanded, the paper pressure L p of the fine powder-containing molten resin, the pressure L p larger first than reduce the rate of with decreasing temperature L T of the paper fine powder-containing molten resin Reduced at a speed of
- the first speed is, for example, in the range of 50 to 100 MPa / second. If it does in this way, in the paper fine powder containing molten resin which is still maintaining fluidity, in the 1st foam layer 3a, the 2nd small average pore diameter of a bubble is smaller than the 1st foam layer 3a. A foam layer 3b is formed.
- the temperature L T is a temperature higher than the temperature obtained by adding 70 ° C. to a glass transition temperature Tg of the thermoplastic resin (L T> Tg + 70 °C )
- the pressure L p of the paper fine powder-containing molten resin After performing the operation of reducing at the first speed for a predetermined time, at time t 3 , the convex portion 30 is further retracted from the cavity 29 by a predetermined amount via the support base 35 by the piston rod 36. As a result, the volume of the cavity 29 is further expanded, and the pressure L p of the paper fine powder-containing molten resin is reduced at the second speed.
- the second speed is smaller than the first speed, for example, in the range of 5 to 30 MPa / second.
- a layer having bubbles having an average pore diameter larger than that of the first foam layer 3a inside the second foam layer 3b. Is formed.
- the paper fine powder-containing molten resin temperature L T With the decrease, the bubbles in the layer inside the second foamed layer 3b become enormous. And in this case, there exists a possibility that the intensity
- the paper fine powder-containing molten resin temperature L T is the thermoplastic resin glass transition temperature Tg to 70 ° C. and the mixture was temperature below the temperature (L T ⁇ Tg + 70), containing the paper fine powder
- the convex portion 30 is advanced by a predetermined amount with respect to the cavity 29 via the support base 35 by the piston rod 36.
- volume of the cavity 29 is reduced, the pressure L p of the paper fine powder-containing molten resin is increased.
- the bubbles that have become larger inside the second foam layer 3b are compressed and refined, and the first foam layer 3a.
- the 3rd foam layer 3c which is provided with the bubble whose average hole diameter is larger than it, and does not have the enlarged bubble is formed.
- the paper fine powder-containing resin molded body 1 of the present embodiment may further contain a scented component.
- a fragrance component known per se can be mixed with the thermoplastic resin and used.
- perfuming ingredients known per se include, for example, hinokitiol, troponoid, ⁇ -tyaprisin, ⁇ -tyaprisin, ⁇ -drabrin, monoterpene hydrocarbons, monoterpene alcohols, phenols, phenol methyl ethers, and sexterpene hydrocarbons And dexterpene alcohols, ketones, lactones, carboxylic acids, diterpene alcohols, aldehydes, esters, oxides, ammonia, acetic acid, butyric acid, isovaleric acid, amino acids, organic acids, catechins, fatty acids and the like.
- the fragrance component contained in the paper fine powder-containing resin molded body 1 may be one fragrance component selected from the above group or a plurality of fragrance components.
- the fragrance component contained is held in the bubbles of the foam layer 3.
- the scented component held in the first foamed layer 3a close to the surface moves to the outside through the non-foamed layer 2, whereby the scented component is released.
- maintained at the 3rd foam layer 3c far from the surface moves to the 1st foam layer 3a close
- the third foam layer 3c is provided with bubbles having an average pore diameter larger than that of the first foam layer 3a, so that a large amount of the fragrant component can be held in the bubbles.
- the second foam layer 3b existing between the third foam layer 3c and the first foam layer 3a is provided with bubbles having an average pore diameter smaller than that of the first foam layer 3a. The movement to the 1st foaming layer 3a of the fragrance
- the scented component can be continuously released over a long period of time, that is, excellent. Fragrance persistence can be obtained.
- the paper fine powder-containing resin molded body 1 containing the scented component of the present embodiment is charged into the cylinder 12 from the hopper 16. Thereafter, the fragrance component can be produced by feeding the scented component into the cylinder 12 from the hopper 16 before feeding the fluid in the supercritical state or simultaneously with feeding the paper fine powder.
- the amount of the scented component is, for example, in the range of 0.1 to 5 parts by weight with respect to 100 parts by weight of the thermoplastic resin.
- the fine paper powder and the scented component may be mixed with the thermoplastic resin in advance to form pellets, and the pellets may be charged into the cylinder 12 from the hopper 16.
- the paper fine powder is described as being mixed with the molten resin. However, a part of the paper fine powder is replaced with wood powder, and the mixture of the paper fine powder and wood powder is used. May be mixed with the molten resin.
- SYMBOLS 1 Paper fine powder containing resin molding, 2 ... Non-foaming layer, 3a ... 1st foaming layer, 3b ... 2nd foaming layer, 3c ... 3rd foaming layer, 11 ... Injection molding apparatus, 29 ... Cavity.
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Abstract
Description
Claims (13)
- 紙微粉体を含む熱可塑性樹脂からなり、表面に形成された非発泡層と内部に形成された発泡層とを備える紙微粉体含有樹脂成形体において、
該紙微粉体含有樹脂成形体は、熱可塑性樹脂100質量部に対し、平均粒子径が25~200μmの範囲の紙微粉体を1~400質量部の範囲で含むと共に、
該発泡層は、表面に近い側から順に、10~100μmの範囲の平均孔径を備える気泡からなる第1の発泡層と、5~50μmの範囲の平均孔径を備える気泡からなる第2の発泡層と、20~500μmの範囲の平均孔径を備える気泡からなる第3の発泡層とからなることを特徴とする紙微粉体含有樹脂成形体。 - 請求項1記載の紙微粉体含有樹脂成形体において、前記熱可塑性樹脂は、ポリエチレン、ポリプロピレン、ポリエステル、ポリ乳酸、熱可塑性エラストマー、ポリスチレン、ABS樹脂からなる群から選択される1種の樹脂であることを特徴とする紙微粉体含有樹脂成形体。
- 請求項1記載の紙微粉体含有樹脂成形体において、前記紙微粉体は、新聞紙、雑誌、包装紙、段ボール、OA用紙からなる群から選択される1種以上の古紙を原料として微粉砕されたものであることを特徴とする紙微粉体含有樹脂成形体。
- 請求項1記載の紙微粉体含有樹脂成形体において、付香成分を含有することを特徴とする紙微粉体含有樹脂成形体。
- 請求項4記載の紙微粉体含有樹脂成形体において、前記付香成分は、ヒノキチオール、トロポノイド、α-ツヤプリシン、γ-ツヤプリシン、β-ドラブリン、モノテルペン炭化水素類、モノテルペンアルコール類、フェノール類、フェノールメチルエーテル類、セキステルペン炭化水素類、セキステルペンアルコール類、ケトン類、ラクトン類、カルボン酸、ジテルペンアルコール、アルデヒド、エステル、オキサイド、アンモニア、酢酸、酪酸、イソ吉草酸、アミノ酸、有機酸、カテキン、脂肪酸からなる群から選択される1種以上の化合物であることを特徴とする紙微粉体含有樹脂成形体。
- 請求項1記載の紙微粉体含有樹脂成形体において、床材、家具、電化製品の枠体、自動車内装部品、浴槽の蓋、トイレ壁材、キッチン部材、飲料用食器、飲料用以外の各種食器、容器、パッケージ、中空体、コールドパリソン、釣用疑似餌、防虫剤容器、文房具、ファイルからなる群から選択される1種の成形体であることを特徴とする紙微粉体含有樹脂成形体。
- 請求項1記載の紙微粉体含有樹脂成形体において、前記成形体は前記紙微粉体により少なくとも内表面が粗面化された飲料用食器であることを特徴とする紙微粉体含有樹脂成形体。
- 溶融状態の熱可塑性樹脂100質量部に対し、平均粒子径が25~200μmの範囲の紙微粉体を、1~400質量部の範囲となるように混合して紙微粉体含有熱可塑性樹脂組成物を形成する工程と、
該紙微粉体含有熱可塑性樹脂組成物に、超臨界状態の流体を該紙微粉体含有熱可塑性樹脂組成物の0.05~2質量%の範囲で加圧下に含浸する工程と、
該超臨界状態の流体が含浸された該紙微粉体含有熱可塑性樹脂組成物を所定形状のキャビティに射出する工程と、
該キャビティに射出された該紙微粉体含有熱可塑性樹脂組成物の圧力が該流体の臨界圧力未満になったときに、該キャビティの容積を拡大して、該紙微粉体含有熱可塑性樹脂組成物の圧力を、該紙微粉体含有熱可塑性樹脂組成物の温度の低下に伴う圧力の低減速度よりも大きな第1の速度で低減させる工程と、
さらに、該キャビティの容積を拡大して、該紙微粉体含有熱可塑性樹脂組成物の圧力を第1の速度よりも小さな第2の速度で低減させる工程と、
該紙微粉体含有熱可塑性樹脂組成物の温度が、該熱可塑性樹脂のガラス転位温度Tgに70℃を加えた温度以下の温度(LT≦Tg+70)になる前に、該キャビティの容積を縮小して、該紙微粉体含有熱可塑性樹脂組成物の圧力を増加させる工程とを備えることを特徴とする紙微粉体含有樹脂成形体の製造方法。 - 請求項8記載の紙微粉体含有樹脂成形体の製造方法において、前記超臨界状態の流体は、二酸化炭素または窒素であることを特徴とする紙微粉体含有樹脂成形体の製造方法。
- 請求項8記載の紙微粉体含有樹脂成形体の製造方法において、前記熱可塑性樹脂は、ポリエチレン、ポリプロピレン、ポリエステル、ポリ乳酸、熱可塑性エラストマー、ポリスチレン、ABS樹脂からなる群から選択される1種の樹脂であることを特徴とする紙微粉体含有樹脂成形体の製造方法。
- 請求項8記載の紙微粉体含有樹脂成形体の製造方法において、前記紙微粉体は、新聞紙、雑誌、包装紙、段ボール、OA用紙からなる群から選択される1種以上の古紙を原料として微粉砕されたものであることを特徴とする紙微粉体含有樹脂成形体の製造方法。
- 請求項8記載の紙微粉体含有樹脂成形体の製造方法において、前記超臨界状態の流体を含浸する前に、付香成分を混合する工程を備えることを特徴とする紙微粉体含有樹脂成形体の製造方法。
- 請求項8記載の紙微粉体含有樹脂成形体の製造方法において、前記付香成分は、ヒノキチオール、トロポノイド、α-ツヤプリシン、γ-ツヤプリシン、β-ドラブリン、モノテルペン炭化水素類、モノテルペンアルコール類、フェノール類、フェノールメチルエーテル類、セキステルペン炭化水素類、セキステルペンアルコール類、ケトン類、ラクトン類、カルボン酸、ジテルペンアルコール、アルデヒド、エステル、オキサイド、アンモニア、酢酸、酪酸、イソ吉草酸、アミノ酸、有機酸、カテキン、脂肪酸からなる群から選択される1種以上の化合物であることを特徴とする紙微粉体含有樹脂成形体の製造方法。
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US13/640,919 US9174370B2 (en) | 2010-12-28 | 2011-12-27 | Fine paper powder-containing resin molded object and manufacturing method thereof |
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Also Published As
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EP2559541A4 (en) | 2013-10-09 |
CN102971128A (zh) | 2013-03-13 |
EP2559541A1 (en) | 2013-02-20 |
KR20130014563A (ko) | 2013-02-07 |
US9174370B2 (en) | 2015-11-03 |
EP2559541B1 (en) | 2015-08-12 |
BR112012028709A2 (pt) | 2016-08-16 |
US20130034675A1 (en) | 2013-02-07 |
CN102971128B (zh) | 2015-02-04 |
BR112012028709B1 (pt) | 2020-02-04 |
JPWO2012091003A1 (ja) | 2014-06-05 |
KR101447548B1 (ko) | 2014-10-08 |
CA2797414C (en) | 2014-11-04 |
CA2797414A1 (en) | 2012-07-05 |
JP5785192B2 (ja) | 2015-09-24 |
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