WO2011062007A1 - 繊維強化樹脂用紡績糸と中間体及びこれを用いた繊維強化樹脂成形体 - Google Patents
繊維強化樹脂用紡績糸と中間体及びこれを用いた繊維強化樹脂成形体 Download PDFInfo
- Publication number
- WO2011062007A1 WO2011062007A1 PCT/JP2010/067578 JP2010067578W WO2011062007A1 WO 2011062007 A1 WO2011062007 A1 WO 2011062007A1 JP 2010067578 W JP2010067578 W JP 2010067578W WO 2011062007 A1 WO2011062007 A1 WO 2011062007A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- reinforced resin
- spun yarn
- yarn
- natural plant
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
- B29C70/202—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres arranged in parallel planes or structures of fibres crossing at substantial angles, e.g. cross-moulding compound [XMC]
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/465—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating by melting a solid material, e.g. sheets, powders of fibres
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
- D02G3/402—Yarns in which fibres are united by adhesives; Impregnated yarns or threads the adhesive being one component of the yarn, i.e. thermoplastic yarn
-
- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
-
- 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
- B29K2311/10—Natural fibres, e.g. wool or cotton
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/02—Reinforcing materials; Prepregs
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/40—Knit fabric [i.e., knit strand or strip material]
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/40—Knit fabric [i.e., knit strand or strip material]
- Y10T442/45—Knit fabric is characterized by a particular or differential knit pattern other than open knit fabric or a fabric in which the strand denier is specified
Definitions
- the present invention relates to a spun yarn and intermediate for fiber reinforced resin containing natural plant fibers, and a fiber reinforced resin molded article using the same.
- Plastic is used for the interior of automobiles, airplanes, vehicles, etc., and is lighter than metal. Since plastic alone is insufficient in strength, glass short fibers (cut to a certain length) are mixed in the plastic. However, when discarded, if it is burned in an incinerator, the plastic decomposes into CO 2 and water, but the glass melts and hardens and adheres to the inside of the incinerator. As a result, there is a concern that the life of the incinerator is significantly reduced. Carbon fiber is known as a material having high strength such as glass, but there is a problem that it is expensive and cannot be used for practical use.
- FRTP thermoplastic resin molded body
- Patent Documents 1 and 2 propose fiber reinforced resins using natural plant fibers as reinforcing fibers.
- Patent Document 1 describes that short fibers of hemp fibers are processed into nonwoven fabrics, woven fabrics, and knitted fabrics to form fiber reinforced resins.
- Patent Document 2 describes processing of short fibers of kenaf fibers into nonwoven fabrics and woven fabrics. It is described that a fiber reinforced resin is used.
- the present inventors have proposed a fiber reinforced resin molded body obtained by melting and integrating a natural plant fiber yarn such as hemp and a synthetic resin film (Patent Document 3), and around the natural plant fiber yarn such as hemp. It has been proposed to use a covering yarn wound so as to cover a synthetic resin fiber yarn as a composite yarn for a fiber-reinforced resin molded article (Patent Document 4).
- Patent Documents 1 and 2 are processed into non-woven fabrics, woven fabrics, and knitted fabrics using hemp fibers and kenaf fibers, and melt mixed with the resin or impregnated into fiber reinforced resin (FRP)
- FRP fiber reinforced resin
- the resin does not easily penetrate into the fiber, a large-scale apparatus is required, and molding is not easy.
- natural plant fibers have a lower decomposition temperature than glass fibers and carbon fibers, and cannot be heated to a viscosity that facilitates the penetration of thermoplastic resins as matrix resins. Met.
- Patent Document 3 the inventors of the present invention described in Patent Document 3 have difficulty in melting a synthetic resin film and uniformly impregnating natural plant fiber yarns. It has been found that the cost for manufacturing the yarn is high and the synthetic resin film used for the cover ring is easily caught on a pin tenter or the like when it is made into a multi-axis inserted warp knitted fabric.
- the present invention provides a fiber reinforced resin spun yarn having good integrity between natural plant fibers and synthetic fibers, easily allowing the resin to uniformly penetrate into the natural plant fibers, and having good moldability. And an intermediate and a fiber-reinforced resin molded article using the same.
- the spun yarn for fiber reinforced resin of the present invention is a spun yarn for fiber reinforced resin (FRP) containing natural plant fibers and synthetic fibers, wherein the natural plant fibers and the synthetic fibers are blended yarns, and the synthetic fibers are It is a thermoplastic synthetic fiber that becomes a matrix resin when FRP is used.
- FRP spun yarn for fiber reinforced resin
- the intermediate for fiber reinforced resin of the present invention is characterized in that the spun yarn for fiber reinforced resin is a woven fabric, a knitted fabric, a multi-axis inserted warp knitted fabric, or a braided fabric.
- the fiber-reinforced resin molded article of the present invention is characterized in that the intermediate for fiber-reinforced resin is press-molded by heating to a mold temperature equal to or higher than the melting point of the synthetic fiber.
- Another fiber-reinforced resin molded article of the present invention is characterized in that the spun yarn for fiber-reinforced resin is arranged in at least one direction and is press-molded by heating at a mold temperature equal to or higher than the melting point of the synthetic fiber. .
- natural plant fiber and synthetic fiber are blended yarn, and the synthetic fiber is a thermoplastic synthetic fiber that becomes a matrix resin when it is made into FRP. Therefore, when heated above the melting point of the synthetic fiber, the synthetic fiber The molten thermoplastic synthetic resin rapidly and uniformly infiltrates between the natural plant fibers, and the composite integration of the natural plant fibers and the molten thermoplastic synthetic resin is efficiently performed. That is, since the synthetic fiber is uniformly mixed with the natural plant fiber, the resin easily penetrates between the natural plant fibers when melted. As a result, a fiber-reinforced resin having good moldability and uniform physical properties can be obtained.
- natural plant fibers and synthetic fibers are uniformly mixed, the integrity is good, the handleability is good, and the productivity can be improved.
- the mixing ratio can be easily changed, and uniform mixing is also possible.
- the method using is particularly useful. The same applies when at least two types of synthetic fibers are used.
- natural plant fibers are used, environmental problems during disposal can be solved. Furthermore, by blending natural plant fiber with synthetic fiber to make spun yarn, it can be handled as continuous fiber, and the volume content (Vf) of natural plant fiber in the molded body can be improved. is there. Moreover, even if there are individual differences peculiar to natural plant fibers or differences in harvested places, stable physical properties can be obtained by mixing in the spinning process.
- FIG. 1A and 1B are side views of a spun yarn for fiber reinforced resin using a single yarn according to an embodiment of the present invention.
- 2A and 2B are side views of a spun yarn for fiber reinforced resin according to another embodiment of the present invention.
- FIG. 3A is a perspective view showing a method of forming a molded body by a pressing method using the spun yarn for fiber reinforced resin in one embodiment of the present invention
- FIG. 3B is a perspective view of the molding method
- FIG. FIG. FIG. 4 is a conceptual perspective view of a multi-axis inserted warp knitted fabric showing an application example of the present invention.
- 5A is a plan view of the sheet molded product according to Example 1 of the present invention
- FIG. 5B is a tensile test piece of the sheet molded product
- FIG. 5C is a cross-sectional view taken along the line II of FIG. 5B.
- FIG. 6 is a graph showing the relationship between the molding temperature and the tensile strength in Example 3.
- FIG. 7 is a graph showing the relationship between molding time and tensile strength in Example 3.
- FIG. 8 is a graph showing the relationship between molding pressure and tensile strength in Example 3.
- a spun yarn obtained by blending natural plant fibers and thermoplastic synthetic fibers is used.
- the synthetic fiber is melted and becomes an FRP matrix resin as it is.
- the molten thermoplastic synthetic resin penetrates quickly and uniformly between the natural plant fibers, and the composite integration of the natural plant fibers and the molten thermoplastic synthetic resin is efficiently performed.
- the spun yarn for fiber-reinforced resin of the present invention is obtained by blending natural plant fibers and synthetic fibers in the spinning process.
- blend spinning is performed in at least one process selected from a blended cotton process, a card process, a sliver wrap process, a ribbon wrap process, a drawing process and a roving process in the spinning process.
- the spun yarn is manufactured by applying a predetermined twist in ring spinning. There are open-end spinning and bundling spinning as methods for preventing twisting.
- the blended spun yarn of the present invention may be produced by any method.
- natural plant fibers examples include cotton fibers, flax (linen), hemp fibers such as ramie, kenaf or jute, bamboo fibers, kapok and the like.
- Cotton is preferable because it can be obtained at low cost because it is mass-produced. Linen or ramie linen fibers are preferred. This is because hemp fibers are suitable as reinforcing fibers because of their excellent mechanical properties, and the raw material supply is also stable.
- the hemp fibers are preferably dried and then molded, but can be used even in a state having an equilibrium moisture content without drying. This is because the strength can be kept high with an equilibrium moisture content.
- the preferred fiber length of natural plant fibers is 20 to 400 mm.
- the fiber length is preferably 20 to 50 mm as cotton fiber (cotton), and 20 to 300 mm as hemp fiber (ramie). If the fineness and fiber length are in this range, it is easy to handle as a fiber for FRP, and blending becomes easy.
- the resin constituting the thermoplastic synthetic fiber that can be used in the present invention is preferably a resin that is usually used as a matrix resin for FRP and has a melting point lower than the decomposition temperature of natural plant fibers.
- a resin having a melting point of 90 ° C. or higher and 200 ° C. or lower is preferable.
- examples of such resins include polypropylene (PP), polyethylene (PE), and copolymers thereof, copolymerized polyesters, copolymerized polyamides, polyvinyl chloride, copolymerized polyacetals, polylactic acid, and polybutyl succinate. .
- thermoplastic synthetic fiber having a fineness and a fiber length in the same range as that of natural plant fiber.
- the fiber lengths of natural fibers and thermoplastic synthetic resins are preferably within a range of about ⁇ 20 mm.
- the blended yarn is preferably subjected to an actual twist having a twist coefficient K of 2 to 7 shown below.
- K t / S 1/2
- t the number of twists per unit length of 25.4 mm
- S the cotton count
- S 1/2 That is.
- the fineness of the spun yarn of the present invention is preferably in the range of 4 to 100 (50 to 1,500 dtex) in cotton count. Within this range, the production cost can be reduced, the yarn strength is high, and the workability and handleability are also good.
- the blended yarn may be used as a single yarn, a plurality of yarns may be aligned, or a plurality of yarns may be twisted together.
- a plurality of yarns may be aligned, or a plurality of yarns may be twisted together.
- the yarn for fiber reinforced resin of the present invention can be made into FRP by aligning the yarn itself by a roving method or the like.
- a woven fabric, a knitted fabric, a multi-axis inserted warp knitted fabric, or a braided product may be used as an intermediate for fiber reinforced resin. These intermediates can also be prepregs for use in the final molded body.
- Woven fabrics, knitted fabrics, and multi-axis inserted warp knitted fabrics can be used after being formed into a sheet shape, and assemblies can be used after being formed into a pipe shape.
- the fabric and knitted fabric can be any known tissue.
- the mold temperature is heated to a temperature not lower than the melting point of the resin constituting the thermoplastic synthetic fiber and not higher than the decomposition temperature of the natural plant fiber, followed by pressure molding. Further, the fiber reinforced resin yarn is arranged in at least one direction, and the mold temperature is heated by pressing to a temperature higher than the melting point of the resin constituting the thermoplastic synthetic fiber and lower than the decomposition temperature of the natural plant fiber to form a fiber.
- a reinforced resin molded product can also be obtained.
- hemp fibers are used as natural plant fibers
- a temperature that does not exceed about 200 ° C. as the mold temperature is preferable.
- the melting point of the resin constituting the thermoplastic synthetic fiber is lower than the decomposition temperature of the hemp fiber, such as about 120 ° C.
- the resin may be molded at a temperature higher by about 0 ° C. to 50 ° C. than the melting point temperature. Good.
- the fiber-reinforced thermoplastic resin molded body can use a conventional known molding method, and examples thereof include a hot stamping method, a prepreg molding method, and a press molding method.
- the spun yarns for fiber-reinforced resin of the present invention are arranged so that a plurality of the spun yarns are aligned to form a sheet, or one is folded back to form a sheet.
- One sheet of spun yarn may be used, or a plurality of sheets may be used.
- the arrangement direction of the spun yarns may be changed.
- the arrangement direction of the spun yarns may be changed in the direction of 30 °, 45 °, 60 °, 90 ° for the second and subsequent sheets with respect to the arrangement of the spun yarns of the first sheet.
- the sheet-like material thus arranged is heated at a mold temperature equal to or higher than the melting point of the synthetic fiber and press-molded to obtain a fiber-reinforced resin molded body.
- FIG. 1A and 1B are side views of a spun yarn for fiber reinforced resin using a single yarn according to an embodiment of the present invention.
- the spun yarn 10 for fiber reinforced resin in FIG. 1A is a blended yarn (Z twist) of natural plant fibers and thermoplastic synthetic fibers.
- the spun yarn 11 for fiber reinforced resin in FIG. 1B is a blended yarn (S twisted) of natural plant fibers and thermoplastic synthetic fibers.
- the twisting direction may be either.
- FIG. 2A and 2B are side views of the spun yarn for fiber reinforced resin in another embodiment of the present invention.
- the spun yarn 12 for fiber reinforced resin in FIG. 2A is a blended yarn (primary twist S, upper twist S) of natural plant fibers and thermoplastic synthetic fibers.
- the spun yarn 13 for fiber-reinforced resin in FIG. 2B is a blended yarn (primary twist S, upper twist Z) of natural plant fibers and thermoplastic synthetic fibers.
- FIG. 3A is a perspective view showing a method of forming a molded body by a pressing method using the spun yarn for fiber reinforced resin in one embodiment of the present invention
- FIG. 3B is a perspective view of the molding method
- the mixed spun yarn 3a, 3b made of natural plant fiber and thermoplastic synthetic fiber is wound around the metal frame 2 in one direction.
- the number of windings is, for example, 220 for a width of 20 mm and a winding weight of about 7 g. Two places were wound around the metal frame 2 at regular intervals.
- the wound spun yarns 3a and 3b are heated and pressed by hot press dies 4 and 5 to be fused and integrated.
- the melting point is about 170 ° C.
- cotton fiber is used as the natural plant fiber yarn
- its decomposition temperature is about 235 ° C.
- the mold temperature is 180 to 220 ° C.
- the pressure is 1 to 20 MPa
- the thermoforming time is about 0.5 to 20 minutes.
- the mold temperature is 180 to 210 ° C.
- the pressure is 2 to 8 MPa
- the heat molding time is preferably about 2 to 10 minutes.
- FIG. 4 is a conceptual perspective view of a multi-axis inserted warp knitted fabric.
- the fiber-reinforced resin spun yarns 1a to 1f arranged in a plurality of directions are stitched (bundled) in the thickness direction by stitching yarns 7 and 8 hung on the knitting needle 6 and integrated.
- Such a multi-axis inserted warp knitted fabric can be used as a fiber reinforced intermediate and hot press-molded.
- This multiaxial laminated sheet can obtain a fiber-reinforced plastic having an excellent reinforcing effect in multiple directions.
- a binder may be used instead of or in combination with the stitching yarn.
- Example 1 Production of blended spun yarn
- a blended spun yarn 10 having a structure as shown in Fig. 1 was produced.
- US cotton fibers (average fiber length 28 mm) are used as natural plant fibers, and polypropylene (made by Daiwabo Polytech Co., Ltd., trade name “PN-17038”, single fiber fineness 1.6 dtex, average fiber length is used as thermoplastic synthetic fibers.
- 38 mm) fiber (PP fiber) was used.
- the sliver was mixed and fed in a predetermined ratio in the drawing step to perform blending. The spinning was ring spinning, and the blended yarn was manufactured so that the target count was 7 (cotton count).
- a molded body was produced by the pressing method shown in FIGS. 3A to 3C.
- the spun yarns 3a and 3b were wound around the metal frame 2 in one direction as shown in FIG. 3A.
- the length of the metal frame was 380 mm
- the width was 260 mm
- the height was 2 mm.
- the number of spun yarns 3a was 110 for each of the upper and lower sides with respect to a width of 20 mm, for a total of 220.
- the total number of spun yarns 3b was 220.
- the metal frame 2 was wound at two locations at regular intervals. As shown in FIGS.
- FIG. 5A shows a plan view of the obtained sheet molded product. The center is the sheet forming part 20, and both ends are fiber remaining parts 21a.
- the obtained sheet molded product was cut to a length of 200 mm to produce a tensile test piece (length 200 mm, width 20 mm, thickness about 0.8 mm) of the sheet molded portion 20 shown in FIG. 5B.
- 5C is a cross-sectional view taken along the line II of FIG.
- 5B, and 21b is a spun yarn embedded in the resin.
- the number of windings was doubled (up and down, respectively, 220, a total of 440), and molding was performed in the same manner.
- the sample was cut to a length of 50 mm to obtain a bending test piece (length 50 mm, width 20 mm, thickness about 1.5 m).
- test piece formed by sheet stacking by a film stack method using a spun yarn of 100 wt% cotton and a PP film having a thickness of 200 ⁇ m in a ratio of 50:50 is also shown.
- the example product of the present invention had higher bending elastic modulus and bending strength than the comparative example product. It was also confirmed that the blended spun yarn of the example product of the present invention had good handleability and good moldability.
- Example 2 Production of blended spun yarn
- a blended spun yarn 10 having a structure as shown in Fig. 1 was produced.
- US cotton fibers (average fiber length 28 mm) and Chinese hemp fibers (ramie, average fiber length 38 mm) are used as natural plant fibers, and polypropylene (made by Daiwabo Polytech Co., Ltd., trade name " PN-17038 ′′, single fiber fineness 1.6 dtex, average fiber length 38 mm) fiber (PP fiber) was used.
- the sliver was mixed and fed in a predetermined ratio in the drawing step to perform blending.
- the spinning was ring spinning, and the blended yarn was manufactured so that the target count was 7 (cotton count).
- the examples of the present invention had high tensile elastic modulus, flexural modulus, and bending strength. It was also confirmed that the blended spun yarn of the example product of the present invention had good handleability and good moldability.
- Example 3 Using the blended spun yarn of Experiment No. 1-1 of Example 1, the conditions of molding temperature, molding time, and molding pressure were examined.
- FIG. 6 is a graph showing the relationship between molding temperature and tensile strength
- FIG. 7 is a graph showing the relationship between molding time and tensile strength
- FIG. 8 is a graph showing the relationship between molding pressure and tensile strength.
- the molding temperature was preferably 180 to 200 ° C. Further, as apparent from FIG. 7, there was no problem if the molding time was 2 to 10 minutes. Further, as apparent from FIG. 8, there was no problem if the molding pressure was in the range of 2 to 8 MPa.
Abstract
Description
K=t/S1/2
但し、tは単位長さ25.4mm当たりの撚り数、Sは綿番手、S1/2は
撚り係数が前記の範囲であると、製造コストは安くでき、糸強力も高く、加工性や取り扱い性も良好である。
(1)混紡紡績糸の作製
本実施例においては、図1に示すような構造の混紡紡績糸10を作製した。天然植物繊維として、米国産の木綿繊維(平均繊維長28mm)を使用し、熱可塑性合成繊維としてポリプロピレン(ダイワボウポリテック社製、商品名“PN-17038”、単繊維繊度1.6dtex,平均繊維長38mm)繊維(PP繊維)を使用した。混紡方法は、練条工程において、各スライバーを所定の割合になるように混合して供給することにより混紡した。精紡はリング精紡とし、目標番手7番(綿番手)となるように混紡糸を製造した。
得られた混紡紡績糸を用いて図3A~Cに示すプレス法により成形体を作製した。まず、メタルフレーム2に、紡績糸3a、3bを図3Aのように一方向に巻きつけた。メタルフレームの長さは380mm、幅260mm、高さ2mmであった。紡績糸3aの本数は幅20mmに対し、上下それぞれ110本であり、合計220本とした。また、紡績糸3bも同様に合計220本とした。図3Aに示すとおり、メタルフレーム2に一定間隔に2箇所巻き付けた。この巻きつけた糸に、図3B~Cに示すように、熱プレス金型4,5によって巻き付け糸を加熱加圧し、溶融一体化させた。PP繊維の融点が170℃であったので、金型温度は200℃に設定した。圧力は4MPa、成型時間を5分とした。得られたシート成形品の平面図を図5Aに示す。中央はシート成形部20、両端は繊維残部21aである。得られたシート成形品を長さ200mmにカットし、図5Bに示すシート成形部20の引張試験片(長さ200mm、幅20mm、厚み約0.8mm)を作製した。図5Cは、図5BのI-I断面図であり、21bは、樹脂中に埋め込まれた紡績糸である。なお、曲げ試験用試験片については、厚みを厚くする必要があるため、巻き付け本数を2倍(上下それぞれ220本、合計440本)にして同様に成形を行い、得られたシート成形品を、長さ50mmにカットし、曲げ試験片(長さ50mm、幅20mm、厚み約1.5m)を得た。
糸物性と引張弾性率、引張強度、曲げ弾性率、曲げ強度を測定した。糸物性はJISL1095:1999に従って測定し、引張試験は、JIS K 7054:1995に準じ、オートグラフ(島津製作所製:AG-IS)を用いて、つかみ具間距離100mm、試験速度1mm/minで行った。曲げ試験は、JISK7017:1999(3点曲げ試験)に準じ、支点間距離24mm、試験速度1mm/minで行った。この実験の条件と結果を表1に示す。比較例として木綿100wt%の紡績糸と、厚み200μmのPPフィルムを50:50の割合で使用し、フィルムスタック法によってシート成形した試験片の結果も示す。
(1)混紡紡績糸の作製
本実施例においては、図1に示すような構造の混紡紡績糸10を作製した。天然植物繊維として、米国産の木綿繊維(平均繊維長28mm)、及び中国産の麻繊維(ラミー、平均繊維長38mm)を使用し、熱可塑性合成繊維としてポリプロピレン(ダイワボウポリテック社製、商品名“PN-17038”、単繊維繊度1.6dtex,平均繊維長38mm)繊維(PP繊維)を使用した。混紡方法は、練条工程において、各スライバーを所定の割合になるように混合して供給することにより混紡した。精紡はリング精紡とし、目標番手7番(綿番手)となるように混紡糸を製造した。
成形時間を2分間として以外は、実施例1と同様の方法にてシート成形を行った。なお、曲げ試験片については、実施例1と同様に巻き付け本数を2倍にして作成した。
実施例1と同様の方法にて糸物性と引張弾性率、引張強度、曲げ弾性率、曲げ強度を測定した。この実験の結果を表2に示す。
実施例1の実験番号1-1の混紡紡績糸を用いて、成形温度、成形時間、成形圧力の各条件の検討をした。図6に成形温度と引張強度の関係を示すグラフ、図7に成形時間と引張強度の関係を示すグラフ、図8に成形圧力と引張強度の関係を示すグラフを各々示す。
2 メタルフレーム
4,5 熱プレス金型
6 編針
7,8 ステッチング糸
21b 樹脂中に埋め込まれた紡績糸
Claims (8)
- 天然植物繊維と合成繊維を含む繊維強化樹脂(FRP)用紡績糸であって、
前記天然植物繊維と前記合成繊維は混紡糸であり、
前記合成繊維はFRPにしたときにマトリックス樹脂となる熱可塑性合成繊維であることを特徴とする繊維強化樹脂用紡績糸。 - 前記天然植物繊維は、木綿、麻、カポック及び竹から選ばれる少なくとも一つの繊維である請求項1に記載の繊維強化樹脂用紡績糸。
- 前記熱可塑性合成繊維を構成する樹脂の融点は、90℃以上200℃以下である請求項1に記載の繊維強化樹脂用紡績糸。
- 前記熱可塑性合成繊維は、ポリプロピレン(PP)、ポリエチレン(PE)、及びこれらの共重合体、共重合ポリエステル、共重合ポリアミド、ポリ塩化ビニル、共重合ポリアセタール、ポリ乳酸又はポリコハク酸ブチルの繊維である請求項1又は3に記載の繊維強化樹脂用紡績糸。
- 前記天然植物繊維と、前記合成繊維の配合割合は、重量比で天然植物繊維糸:合成繊維=80:20~30:70の範囲である請求項1~4のいずれかに記載の繊維強化樹脂用紡績糸。
- 請求項1~5のいずれか1項に記載の繊維強化樹脂用紡績糸を、織物、編物、多軸挿入たて編物、又は組み物とした繊維強化樹脂用中間体。
- 請求項6に記載の繊維強化樹脂用中間体を、前記合成繊維の融点以上の金型温度に加熱してプレス成形した繊維強化樹脂成形体。
- 請求項1~5のいずれか1項に記載の繊維強化樹脂用紡績糸を少なくとも一方向に配列し、前記合成繊維の融点以上の金型温度で加熱してプレス成形した繊維強化樹脂成形体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800519780A CN102713036A (zh) | 2009-11-17 | 2010-10-06 | 纤维强化树脂用纺纱和中间体以及使用其的纤维强化树脂成型体 |
JP2011541850A JP5780968B2 (ja) | 2009-11-17 | 2010-10-06 | 繊維強化樹脂用紡績糸と中間体及びこれを用いた繊維強化樹脂成形体 |
US13/504,000 US20120220179A1 (en) | 2009-11-17 | 2010-10-06 | Spun yarn and intermediate for fiber-reinforced resin, and molded article of fiber-reinforced resin using the same |
EP10831404.8A EP2503036A4 (en) | 2009-11-17 | 2010-10-06 | GUNPUNED YARN AND INTERMEDIATE PRODUCT FOR A FIBER-REINFORCED RESIN OF ART AND FORMING OF FIBER-REINFORCED RESIN WITH THIS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-261529 | 2009-11-17 | ||
JP2009261529 | 2009-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011062007A1 true WO2011062007A1 (ja) | 2011-05-26 |
Family
ID=44059491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/067578 WO2011062007A1 (ja) | 2009-11-17 | 2010-10-06 | 繊維強化樹脂用紡績糸と中間体及びこれを用いた繊維強化樹脂成形体 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120220179A1 (ja) |
EP (1) | EP2503036A4 (ja) |
JP (1) | JP5780968B2 (ja) |
CN (1) | CN102713036A (ja) |
WO (1) | WO2011062007A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2492808B (en) * | 2011-07-13 | 2013-11-20 | Global Composites Group Ltd | High speed composite manufacture |
JP2013245328A (ja) * | 2012-05-29 | 2013-12-09 | Kurabo Ind Ltd | 繊維強化樹脂ペレット、その製造方法及び繊維強化樹脂成形体 |
JP2014095049A (ja) * | 2012-11-12 | 2014-05-22 | Polymer Associates Kk | セルロース系繊維強化熱可塑性樹脂複合成形体 |
JP2015151475A (ja) * | 2014-02-14 | 2015-08-24 | ユニチカトレーディング株式会社 | 繊維強化プラスチック |
WO2020170469A1 (ja) * | 2019-02-19 | 2020-08-27 | ダイワボウホールディングス株式会社 | 紡績糸、その製造方法及びそれを含む布帛 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103243428A (zh) * | 2013-05-21 | 2013-08-14 | 海安县鑫荣纺织有限责任公司 | 一种棉纤维、竹纤维和木棉纤维的混纺纱 |
US10053801B2 (en) | 2014-01-28 | 2018-08-21 | Inman Mills | Sheath and core yarn for thermoplastic composite |
US9410270B2 (en) | 2014-08-22 | 2016-08-09 | Nike, Inc. | Thread structure composition and method of making |
US20160201231A1 (en) * | 2015-01-09 | 2016-07-14 | Dennis Lenz | Renewably sourced yarn and method of manufacturing same |
US20180355523A1 (en) * | 2015-01-09 | 2018-12-13 | Mill Direct, Inc. | Renewably Sourced Yarn and Method of Manufacturing Same |
CN105755619A (zh) * | 2016-05-15 | 2016-07-13 | 孙宁 | 一种棉麻混纺纤维丝 |
JP6310608B1 (ja) * | 2017-06-30 | 2018-04-11 | 古河電気工業株式会社 | 電線用外装体及び外装体付きワイヤーハーネス |
CN107326496A (zh) * | 2017-08-29 | 2017-11-07 | 如皋市达瑞织造有限公司 | 一种棉、金属、竹纤维的混纺纱 |
EP3850132A1 (en) * | 2018-09-12 | 2021-07-21 | Inman Mills | Woven fabric with hollow channel for prevention of structural damage to functional yarn, monofilament yarn, or wire contained therein |
US11359309B2 (en) | 2018-12-21 | 2022-06-14 | Target Brands, Inc. | Ring spun yarn and method |
CN112277338B (zh) * | 2020-09-30 | 2022-04-26 | 陕西科技大学 | 高效任意角度连续纤维增强复合材料的装置和方法 |
FR3125542A1 (fr) * | 2021-07-23 | 2023-01-27 | Pda Ecolab | Hybridation de renforcement par fibres naturelles pour des matériaux composites et des tissus constitués de celle-ci |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4710307B1 (ja) * | 1969-02-27 | 1972-03-28 | ||
JP3193920B2 (ja) * | 1990-08-31 | 2001-07-30 | 松下電器産業株式会社 | スピーカ用ダンパー |
JP2004143401A (ja) | 2002-08-27 | 2004-05-20 | Matsushita Electric Works Ltd | 植物繊維を用いた繊維強化プラスチック |
JP2004149930A (ja) | 2002-10-28 | 2004-05-27 | Matsushita Electric Works Ltd | 植物繊維シート、その製造方法及びこれを用いた繊維強化プラスチック |
JP2007138361A (ja) | 2005-11-22 | 2007-06-07 | Kurabo Ind Ltd | 繊維強化熱可塑性樹脂成形体 |
JP2008240193A (ja) | 2007-03-27 | 2008-10-09 | Kurabo Ind Ltd | 繊維強化樹脂用複合糸と中間体及びこれを用いた繊維強化樹脂成形体 |
JP2009067879A (ja) * | 2007-09-13 | 2009-04-02 | Kurabo Ind Ltd | 繊維強化熱硬化性樹脂成形体 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU680839B2 (en) * | 1992-10-14 | 1997-08-14 | Shaw Industries Group, Inc. | Synthetic yarn with heat-activated binder fiber |
US5698480A (en) * | 1994-08-09 | 1997-12-16 | Hercules Incorporated | Textile structures containing linear low density polyethylene binder fibers |
DE19613965A1 (de) * | 1996-04-09 | 1997-10-16 | Hoechst Trevira Gmbh & Co Kg | Schrumpfarme Hybridgarne, Verfahren zu deren Herstellung und deren Verwendung |
US6820406B2 (en) * | 2001-05-14 | 2004-11-23 | Cargill, Incorporated | Hybrid yarns which include plant bast fiber and thermoplastic fiber, reinforcement fabrics made with such yarns and thermoformable composites made with such yarns and reinforcement fabrics |
US20030157323A1 (en) * | 2001-05-14 | 2003-08-21 | Mikhail Khavkine | Hybrid yarns which include oil seed flax plant bast fiber and other fibers and fabrics made with such yarns |
CN1215209C (zh) * | 2001-10-16 | 2005-08-17 | 泰山玻璃纤维股份有限公司 | 一种由玻璃纤维和聚丙烯纤维组成的复合纤维的制造方法 |
US7825050B2 (en) * | 2006-12-22 | 2010-11-02 | Milliken & Company | VOC-absorbing nonwoven composites |
IL184285A0 (en) * | 2007-06-28 | 2007-10-31 | Wangenheim Keren Elen | Hardened fabric product and production process therefor |
JP5053141B2 (ja) * | 2008-03-25 | 2012-10-17 | ユニチカトレーディング株式会社 | 紡績糸及びその製造方法 |
WO2009131149A1 (ja) * | 2008-04-24 | 2009-10-29 | 倉敷紡績株式会社 | 繊維強化樹脂用複合糸と中間体及びこれを用いた繊維強化樹脂成形体 |
-
2010
- 2010-10-06 WO PCT/JP2010/067578 patent/WO2011062007A1/ja active Application Filing
- 2010-10-06 US US13/504,000 patent/US20120220179A1/en not_active Abandoned
- 2010-10-06 EP EP10831404.8A patent/EP2503036A4/en not_active Withdrawn
- 2010-10-06 CN CN2010800519780A patent/CN102713036A/zh active Pending
- 2010-10-06 JP JP2011541850A patent/JP5780968B2/ja not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4710307B1 (ja) * | 1969-02-27 | 1972-03-28 | ||
JP3193920B2 (ja) * | 1990-08-31 | 2001-07-30 | 松下電器産業株式会社 | スピーカ用ダンパー |
JP2004143401A (ja) | 2002-08-27 | 2004-05-20 | Matsushita Electric Works Ltd | 植物繊維を用いた繊維強化プラスチック |
JP2004149930A (ja) | 2002-10-28 | 2004-05-27 | Matsushita Electric Works Ltd | 植物繊維シート、その製造方法及びこれを用いた繊維強化プラスチック |
JP2007138361A (ja) | 2005-11-22 | 2007-06-07 | Kurabo Ind Ltd | 繊維強化熱可塑性樹脂成形体 |
JP2008240193A (ja) | 2007-03-27 | 2008-10-09 | Kurabo Ind Ltd | 繊維強化樹脂用複合糸と中間体及びこれを用いた繊維強化樹脂成形体 |
JP2009067879A (ja) * | 2007-09-13 | 2009-04-02 | Kurabo Ind Ltd | 繊維強化熱硬化性樹脂成形体 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2503036A4 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2492808B (en) * | 2011-07-13 | 2013-11-20 | Global Composites Group Ltd | High speed composite manufacture |
JP2013245328A (ja) * | 2012-05-29 | 2013-12-09 | Kurabo Ind Ltd | 繊維強化樹脂ペレット、その製造方法及び繊維強化樹脂成形体 |
JP2014095049A (ja) * | 2012-11-12 | 2014-05-22 | Polymer Associates Kk | セルロース系繊維強化熱可塑性樹脂複合成形体 |
JP2015151475A (ja) * | 2014-02-14 | 2015-08-24 | ユニチカトレーディング株式会社 | 繊維強化プラスチック |
WO2020170469A1 (ja) * | 2019-02-19 | 2020-08-27 | ダイワボウホールディングス株式会社 | 紡績糸、その製造方法及びそれを含む布帛 |
Also Published As
Publication number | Publication date |
---|---|
EP2503036A1 (en) | 2012-09-26 |
EP2503036A4 (en) | 2015-09-30 |
JPWO2011062007A1 (ja) | 2013-04-04 |
JP5780968B2 (ja) | 2015-09-16 |
US20120220179A1 (en) | 2012-08-30 |
CN102713036A (zh) | 2012-10-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5780968B2 (ja) | 繊維強化樹脂用紡績糸と中間体及びこれを用いた繊維強化樹脂成形体 | |
WO2009131149A1 (ja) | 繊維強化樹脂用複合糸と中間体及びこれを用いた繊維強化樹脂成形体 | |
JP4748717B2 (ja) | 繊維強化熱可塑性樹脂成形体 | |
JP4810481B2 (ja) | 繊維強化樹脂用複合糸と中間体及びこれを用いた繊維強化樹脂成形体 | |
ES2716977T3 (es) | Método para producir un agregado de fibra de carbono y método para producir plástico reforzado con fibra de carbono | |
KR102023790B1 (ko) | 탄소 섬유 복합 재료 | |
JP2018080442A (ja) | 平面状複合材料 | |
JP5911755B2 (ja) | 繊維強化樹脂ペレットの製造方法及び繊維強化樹脂成形体の製造方法 | |
CN104853893B (zh) | 制备半成品的方法和用于制备复合模塑件、尤其是纤维复合模塑件的半成品以及复合模塑件、尤其是纤维复合模塑件 | |
JP5919755B2 (ja) | 繊維材料の製造方法 | |
TW201231257A (en) | Article of carbon fiber strengthened plastic | |
US20180071957A1 (en) | Fiber-reinforced composite material molded article and method for manufacturing same | |
KR101439150B1 (ko) | 탄소연속섬유/열가소성수지섬유 복합사 및 이의 제조방법 | |
JP6142737B2 (ja) | 熱可塑性プリプレグ及び熱可塑性プリプレグの製造方法 | |
JP6083239B2 (ja) | 繊維強化プラスチックおよびその製造方法 | |
JP2014234427A (ja) | 繊維強化樹脂用繊維集合体、繊維強化樹脂シート及び繊維強化樹脂成形体 | |
US20170259459A1 (en) | Production method for fiber-reinforced thermoplastic resin composite material, production method for fiber-reinforced thermoplastic resin tape, production method for press-molding material, production method for molded article, unidirectional prepreg, and molded article | |
EP3837109B1 (en) | Semi -finished composite materials containing natural fibers and production thereof | |
WO2009130495A3 (en) | Producing yarn | |
JP6912044B2 (ja) | 耐熱性多軸ステッチ基材 | |
JP2013091252A (ja) | 炭素繊維強化樹脂成形品及びその製造方法 | |
JP2004034592A (ja) | 繊維強化複合材の製造方法及び繊維構造体 | |
JP6458589B2 (ja) | シート材料、一体化成形品および一体化成形品の製造方法 | |
JP2581073B2 (ja) | 複合成形用シ−ト及びその製造方法 | |
Asghar | An experimental study of the mechanical properties of jute/polypropylene composites manufactured by the commingled yarn and thermoforming |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080051978.0 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10831404 Country of ref document: EP Kind code of ref document: A1 |
|
DPE2 | Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2011541850 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13504000 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 4784/CHENP/2012 Country of ref document: IN |
|
REEP | Request for entry into the european phase |
Ref document number: 2010831404 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010831404 Country of ref document: EP |