WO2011043187A1 - Article moulé de lunettes, procédé de fabrication de cet article moulé et lunettes - Google Patents

Article moulé de lunettes, procédé de fabrication de cet article moulé et lunettes Download PDF

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WO2011043187A1
WO2011043187A1 PCT/JP2010/066362 JP2010066362W WO2011043187A1 WO 2011043187 A1 WO2011043187 A1 WO 2011043187A1 JP 2010066362 W JP2010066362 W JP 2010066362W WO 2011043187 A1 WO2011043187 A1 WO 2011043187A1
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Prior art keywords
polylactic acid
component
weight
stereocomplex polylactic
parts
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PCT/JP2010/066362
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English (en)
Japanese (ja)
Inventor
聖太郎 田中
小田　実生
勇一 松野
卓朗 北村
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タナカフォーサイト株式会社
帝人株式会社
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Publication of WO2011043187A1 publication Critical patent/WO2011043187A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • 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
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D12/00—Producing frames
    • B29D12/02—Spectacle frames
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0083—Nucleating agents promoting the crystallisation of the polymer matrix
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds

Definitions

  • the present invention relates to a spectacle molded article composed of a stereocomplex polylactic acid resin composition, a method for producing the spectacle molded article, and spectacles having the spectacle molded article.
  • bio-based polymers synthesized from plant-derived raw materials have attracted attention due to concerns about the depletion of petroleum resources and the problem of an increase in the amount of carbon dioxide in the atmosphere, which causes global warming.
  • Such bio-based polymers have carbon neutral properties. That is, the polymer is finally decomposed into carbon dioxide by incineration or the like and released into the atmosphere, but since the plant as a raw material absorbs carbon dioxide in the atmosphere and synthesizes starch, as a whole, Does not increase the amount of carbon dioxide in the atmosphere.
  • polylactic acid which is synthesized in large quantities and inexpensively from plant-derived raw materials such as corn, and has relatively high heat resistance and mechanical properties, has attracted attention.
  • Japanese Patent No. 3201739 discloses an eyeglass molded article composed of a polylactic acid-based biodegradable resin (Claim 1), and describes that poly-L-lactic acid is used as the polylactic acid-based resin. ([0013], Examples).
  • an object of the present invention is to provide an eyeglass molded article having polylactic acid as a main component and excellent in heat resistance. Moreover, the objective of this invention is providing the manufacturing method of the said spectacles molded body excellent in the moldability. Furthermore, the objective of this invention is providing the spectacles which have the said spectacles molded object.
  • the present inventors have obtained a glass molded article excellent in heat resistance with good moldability by using a resin composition containing stereocomplex polylactic acid as a main component. As a result, the present invention has been completed.
  • the present invention includes the following inventions.
  • An eyeglass molded article composed of a stereocomplex polylactic acid-based resin composition containing 60% by weight or more of stereocomplex polylactic acid (component A).
  • stereocomplex polylactic acid resin composition contains 0.01 to 5 parts by weight of a crystal nucleating agent (component B) with respect to 100 parts by weight of stereocomplex polylactic acid (component A).
  • component B a crystal nucleating agent
  • component A stereocomplex polylactic acid
  • stereocomplex polylactic acid resin composition comprises 0.01 to 5 parts by weight of a terminal blocking agent (component C) with respect to 100 parts by weight of stereocomplex polylactic acid (component A). Or the spectacles molding as described in (2).
  • stereocomplex polylactic acid resin composition contains 1 to 10 parts by weight of an impact modifier (D component) with respect to 100 parts by weight of stereocomplex polylactic acid (A component).
  • D component impact modifier
  • a component stereocomplex polylactic acid
  • the stereocomplex polylactic acid resin composition comprises 45 parts by weight or less of polybutylene terephthalate resin (E component) with respect to 100 parts by weight of stereocomplex polylactic acid (A component).
  • the spectacles molded product according to any one of (4).
  • the spectacle molded body is at least one selected from the group consisting of a nose pad, a forehead, an ear modern, a Ude, and two or more of these integrally molded bodies. ).
  • a stereocomplex polylactic acid resin composition containing 60% by weight or more of stereocomplex polylactic acid (component A) is melt-kneaded,
  • stereocomplex polylactic acid resin composition contains 0.01 to 5 parts by weight of a crystal nucleating agent (component B) with respect to 100 parts by weight of stereocomplex polylactic acid (component A).
  • component B crystal nucleating agent
  • stereocomplex polylactic acid resin composition comprises 0.01 to 5 parts by weight of a terminal blocking agent (component C) with respect to 100 parts by weight of stereocomplex polylactic acid (component A).
  • component C a terminal blocking agent
  • component A stereocomplex polylactic acid
  • stereocomplex polylactic acid resin composition contains 1 to 10 parts by weight of an impact resistance improver (component D) with respect to 100 parts by weight of stereocomplex polylactic acid (component A).
  • component D an impact resistance improver
  • component A stereocomplex polylactic acid
  • the stereocomplex polylactic acid-based resin composition contains 45 parts by weight or less of polybutylene terephthalate resin (E component) with respect to 100 parts by weight of stereocomplex polylactic acid (component A).
  • E component polybutylene terephthalate resin
  • component A stereocomplex polylactic acid
  • the spectacle molded body is at least one selected from the group consisting of a nose pad, a forehead, an ear modern, a Ude, and two or more of these integrally molded bodies. ).
  • the eyeglass molded article of the present invention is preferable from the viewpoint of environmental protection because it mainly contains polylactic acid synthesized from plant-derived materials. Moreover, the eyeglass molded article of the present invention is excellent in heat resistance. Furthermore, according to the method for manufacturing a spectacle molded article of the present invention, a spectacle molded article can be obtained with good moldability.
  • the eyeglass molded article of the present invention is a stereocomplex polylactic acid-based material containing 60% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more, and further preferably 95% by weight or more of stereocomplex polylactic acid (component A). It is comprised from a resin composition.
  • Stereocomplex polylactic acid is a mixture of poly L-lactic acid and poly D-lactic acid.
  • Poly L-lactic acid is polylactic acid mainly composed of L-lactic acid units, and 90 to 100 mol% of L-lactic acid units, 0 to 10 mol% of D-lactic acid units and / or copolymerization components other than lactic acid, Consists of.
  • Poly-D-lactic acid is a polylactic acid mainly composed of D-lactic acid units, comprising 90 to 100 mol% of D-lactic acid units, 0 to 10 mol% of L-lactic acid units and / or copolymerization components other than lactic acid. Consists of.
  • Copolymerization components other than lactic acid are lactic acid monomers or other monomer components copolymerizable with lactide, and dicarboxylic acids, polyhydric alcohols, hydroxycarboxylic acids, lactones having two or more ester bond-forming functional groups. Etc .; and various polyesters, various polyethers, various polycarbonates and the like comprising these various components.
  • dicarboxylic acid examples include succinic acid, adipic acid, azelaic acid, sebacic acid, terephthalic acid, and isophthalic acid.
  • polyhydric alcohols include aromatic polyhydric alcohols such as those obtained by addition reaction of bisphenol with ethylene oxide, ethylene glycol, propylene glycol, butanediol, hexanediol, octanediol, glycerin, sorbitan, trimethylolpropane, neopentyl glycol, etc. And aliphatic glycols such as diethylene glycol, triethylene glycol, polyethylene glycol, and polypropylene glycol.
  • hydroxycarboxylic acid examples include glycolic acid and hydroxybutylcarboxylic acid.
  • lactone examples include glycolide, ⁇ -caprolactone glycolide, ⁇ -caprolactone, ⁇ -propiolactone, ⁇ -butyrolactone, ⁇ - or ⁇ -butyrolactone, pivalolactone, ⁇ -valerolactone, and the like.
  • Both poly L-lactic acid and poly D-lactic acid have a weight average molecular weight of 100,000 to 500,000, preferably 150,000 to 350,000.
  • the weight average molecular weight is a standard polystyrene equivalent value measured by gel permeation chromatography (GPC) using chloroform as an eluent.
  • Poly L-lactic acid or poly D-lactic acid can be synthesized by a conventionally known method. That is, it can be synthesized by ring-opening polymerization of lactide (lactide method), dehydration condensation of lactic acid (direct polymerization method), a method combining these with solid phase polymerization, and the like. In the polymerization reaction, an organic tin compound such as tin octylate is usually used as a catalyst.
  • Stereocomplex polylactic acid (component A) can be produced by coexisting and mixing poly L-lactic acid and poly D-lactic acid at a predetermined weight ratio.
  • the solvent is not particularly limited as long as it dissolves poly L-lactic acid and poly D-lactic acid.
  • the solvent is not particularly limited as long as it dissolves poly L-lactic acid and poly D-lactic acid.
  • chloroform, methylene chloride, dichloroethane, tetrachloroethane, phenol, tetrahydrofuran, N-methylpyrrolidone, N, N-dimethylformamide, butyrolactone, trioxane, hexafluoroisopropanol and the like are preferably used alone or in combination of two or more.
  • mixing can be performed in the absence of a solvent. That is, a method in which a predetermined amount of poly-L-lactic acid and poly-D-lactic acid are mixed and then melt-kneaded, or a method in which one of them is melted and the remaining one is added and kneaded can be employed.
  • the weight average molecular weight of stereocomplex polylactic acid (component A) is 100,000 to 500,000, preferably 100,000 to 300,000.
  • stereocomplex polylactic acid (component A) obtained as described above is 195 to 250 ° C., preferably 200 to 220 ° C.
  • Stereocomplex polylactic acid is excellent in crystallinity and heat resistance.
  • an eyeglass molded article having excellent heat resistance can be obtained with good moldability.
  • the stereocomplex polylactic acid resin composition preferably contains a crystal nucleating agent (component B).
  • the crystal nucleating agent (component B) is used for accelerating the crystallization of stereocomplex polylactic acid (component A) and maintaining the stereocomplex phase in the molded product composed of the resin composition in a stable and high level.
  • Examples of the crystal nucleating agent (component B) include calcium silicate, talc, kaolinite, and montmorillonite.
  • the crystal nucleating agent (component B) is preferably contained in an amount of 0.01 to 5 parts by weight, more preferably 0.1 to 3 parts by weight, based on 100 parts by weight of the stereocomplex polylactic acid (component A). More preferably, the content is ⁇ 3 parts by weight.
  • the stereocomplex polylactic acid resin composition preferably contains a terminal blocking agent (C component).
  • a terminal blocker component C
  • the terminal blocking agent (component C) is preferably contained in an amount of 0.01 to 5 parts by weight, more preferably 1 to 3 parts by weight with respect to 100 parts by weight of the stereocomplex polylactic acid (component A).
  • the end-capping agent (C component) reacts with some or all of the carboxyl group ends of the polylactic acid (A component) in the resin composition and functions to block, for example, carbodiimide compounds, epoxy compounds, oxazolines. Compounds and the like.
  • carbodiimide compound those synthesized by a known method can be used, and examples thereof include dicyclohexylcarbodiimide and diisopropylcarbodiimide.
  • epoxy compounds include ethylene oxide, propylene oxide, phenyl glycidyl ether, orthophenyl phenyl glycidyl ether, pt-butylphenyl glycidyl ether, N-glycidyl phthalimide, hydroquinone diglycidyl ether, resorcin diglycidyl ether, 1,6-hexane. Examples thereof include diol diglycidyl ether and hydrogenated bisphenol A-diglycidyl ether.
  • oxazoline compound examples include 2,2′-m-phenylenebis (2-oxazoline), 2,2′-p-phenylenebis (2-oxazoline) and the like.
  • the stereocomplex polylactic acid resin composition preferably contains an elastic polymer as an impact resistance improver (component D).
  • an impact resistance improver (component D) By including an impact resistance improver (component D) in the resin composition, the impact resistance of the obtained spectacles can be improved.
  • the impact resistance improver (component D) is preferably contained in an amount of 1 to 10 parts by weight, more preferably 2 to 8 parts by weight, based on 100 parts by weight of the stereocomplex polylactic acid (component A).
  • an elastic polymer a rubber component having a glass transition temperature of 10 ° C. or less, a monomer selected from aromatic vinyl, vinyl cyanide, (meth) acrylic acid ester, and a vinyl compound copolymerizable therewith Or the graft copolymer by which 2 or more types was copolymerized can be mentioned.
  • the elastic polymer preferably contains 40% by weight or more of a rubber component, more preferably 60% by weight or more.
  • Examples of the rubber component include butadiene rubber, butadiene-acrylic composite rubber, acrylic rubber, and acrylic-silicone composite rubber.
  • aromatic vinyl compound copolymerized with the rubber component examples include styrene, ⁇ -methylstyrene, p-methylstyrene, alkoxystyrene, halogenated styrene and the like, and styrene is particularly preferable.
  • vinyl cyanide compound examples include acrylonitrile and methacrylonitrile.
  • Examples of the (meth) acrylic acid ester compound include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, octyl (meth) acrylate, cyclohexyl (meth) acrylate, and the like. These can be used alone or in combination of two or more.
  • Such elastic polymers are commercially available and can be easily obtained.
  • rubber components mainly composed of butadiene rubber, acrylic rubber, or butadiene-acrylic composite rubber, Kane Ace B series (for example, B-56 etc.) of Kaneka Chemical Industry Co., Ltd., Mitsubishi Rayon Co., Ltd.
  • Metabrene C series for example, C-223A
  • W series for example, W-450A
  • Paraloid EXL series for example, EXL-2602
  • HIA series for example, HIA- 15
  • BTA series for example, BTA-III, etc.
  • KCA series etc.
  • those containing acryl-silicone composite rubber as the main rubber component are METABRENE S-2001 or SRK from Mitsubishi Rayon Co., Ltd. Examples include those sold under the trade name of -200.
  • the stereocomplex polylactic acid resin composition preferably contains a polybutylene terephthalate resin (component E).
  • Polybutylene terephthalate resin (E component) is excellent in moldability, mechanical strength, heat resistance and the like. By using the polybutylene terephthalate resin (E component), the moldability, mechanical strength, and heat resistance of the obtained spectacle molded article can be further improved.
  • Polybutylene terephthalate resin (component E) can be used without any problem as long as the intrinsic viscosity is 0.5 to 2.0.
  • the polybutylene terephthalate resin (component E) is preferably contained in 45 parts by weight or less, more preferably 20 parts by weight or more and 45 parts by weight or less, relative to 100 parts by weight of the stereocomplex polylactic acid (component A). More preferably, it is contained in an amount of 30 to 45 parts by weight.
  • the stereocomplex polylactic acid-based resin composition may further include a plasticizer (such as phthalate ester), a stabilizer (such as calcium stearate), a color pigment (such as red lip yellow lead, titanium oxide), if necessary.
  • a plasticizer such as phthalate ester
  • a stabilizer such as calcium stearate
  • a color pigment such as red lip yellow lead, titanium oxide
  • Fillers calcium carbonate, clay, talc, etc.
  • antioxidants alkylphenols, organic phosphites, etc.
  • UV absorbers alicylate, benzotriazole, etc.
  • flame retardants phosphate esters, antimony oxide, etc.
  • Various conventionally known additives such as antistatic agents and antibacterial agents can be blended. These blending amounts can be determined as appropriate.
  • the stereocomplex polylactic acid-based resin composition constituting the spectacles molded article of the present invention comprises, as necessary, stereocomplex polylactic acid (component A), crystal nucleating agent (component B), terminal blocker (C Component), impact modifier (D component), polybutylene terephthalate resin (E component), and the above various additives are blended in the above blending ratio.
  • the blending method is not particularly limited, and can be performed by a conventionally known method. For example, mixing and kneading may be performed using a mill roll, a Banbury mixer, a super mixer, a single screw or twin screw extruder, and the like. Moreover, after mixing, it can be melt-kneaded and pelletized.
  • the melting point of the resin composition is 195 to 250 ° C., preferably 205 to 250 ° C.
  • the ⁇ Ha and ⁇ Hb are determined by measuring the resin composition using a differential scanning calorimeter (DSC) in a nitrogen atmosphere at a temperature increase rate of 20 ° C./min.
  • DSC differential scanning calorimeter
  • the resin composition obtained as described above is melt-kneaded and injection-molded under conditions of a mold temperature of 80 to 130 ° C. and a cooling time of 10 to 60 seconds, thereby forming a desired spectacle molded body shape.
  • the melting temperature of the resin composition is preferably not less than the melting point of the resin composition and in the range of 210 to 250 ° C.
  • the resin composition contains stereocomplex polylactic acid (component A) having excellent crystallinity
  • component A stereocomplex polylactic acid
  • the cooling time during injection molding is as short as 10 to 60 seconds, and the moldability is excellent. For this reason, the production amount of the molded body per unit time is large, and the production efficiency is good.
  • a mold temperature of 80 to 115 ° C. and a cooling time of 10 to 50 seconds are preferable, and a mold temperature of 110 ° C. and a cooling time of 20 to 30 seconds are most preferable.
  • a molded body obtained by injection molding under the above conditions is excellent in surface scratch resistance.
  • the eyeglass molded body may be a member for each member such as a nose pad (1), forehead (2), Ude (3), ear modern (4), etc.
  • a nose pad (1) a nose pad
  • a forehead (2) a nose pad
  • Ude (3) a member for each member
  • ear modern (4) a member for each member
  • two or more integrally formed bodies may be used.
  • the eyeglass molded article of the present invention may be colored to a desired color by blending a color pigment into the resin composition.
  • a color pigment such as stereocomplex polylactic acid (A component) excellent in crystallinity
  • the obtained molded object is excellent in glossiness, and can be used as a member for spectacles without performing clear coating on the surface.
  • the eyeglass molded article of the present invention may be one whose surface is coated with a paint or the like.
  • the eyeglasses having the eyeglass molded article of the present invention include sunglasses, sports sunglasses (various sports such as bicycle, land, ski, fishing), goggles and the like.
  • the eyeglasses of the present invention thus obtained have excellent heat resistance and do not deform due to heat even when placed at high temperatures. It also has excellent surface scratch resistance.
  • stereocomplex polylactic acid (component A) (weight average molecular weight; 130,000) formed from equal weights of poly L-lactic acid and poly D-lactic acid was used.
  • Example 1 Stereocomplex polylactic acid (component A) 100 parts by weight, talc (component B) (Nippon Talc Co., Ltd .: P-3) 1 part by weight, epoxy-based endblocker (component C) (BASF Japan Co., Ltd.) 2 parts by weight of ADR-4368CS) was supplied to the raw material supply part of the twin-screw kneading extruder.
  • the mixture was melt-extruded and pelletized at a cylinder temperature of 240 ° C., a screw rotation speed of 150 rpm, and a discharge rate of 25 kg / h.
  • the obtained pellets had a melting point of 220 ° C.
  • the obtained pellets were melt-kneaded and injection-molded under the conditions of a mold temperature of 110 ° C. and a cooling time of 30 seconds, and the nose pad (1), the nose pad (1) and the front case (2 ) And the Ude (3) and the Ear Modern (4) integrally molded body (20), respectively.
  • Example 2 Stereocomplex polylactic acid (component A) 100 parts by weight, talc (component B) (Nippon Talc Co., Ltd .: P-3) 1 part by weight, epoxy-based endblocker (component C) (BASF Japan Co., Ltd.) 2 parts by weight of ADR-4368CS) and 5 parts by weight of acrylic rubber (component D) (Mitsubishi Rayon Co., Ltd .: Metabrene S-2001) were supplied to the raw material supply part of the twin-screw kneading extruder. Pelletization was performed under the same conditions. The obtained pellets had a melting point of 215 ° C.
  • the obtained pellets were melt-kneaded and injection molded under the same conditions as in Example 1 to obtain a nose pad (1), a spectacle molded body (10), and a spectacle molded body (20).
  • Example 3 Stereocomplex polylactic acid (component A) 100 parts by weight, talc (component B) (Nippon Talc Co., Ltd .: P-3) 1 part by weight, epoxy-based endblocker (component C) (BASF Japan Co., Ltd.) ADR-4368CS) 2 parts by weight, acrylic rubber (component D) (Mitsubishi Rayon Co., Ltd .: Methbrene S-2001), polybutylene terephthalate resin (E component) (Wintech Polymer Co., Ltd .: Jura) Nex 2002) 40 parts by weight was supplied to the raw material supply part of the twin-screw kneading extruder and pelletized under the same conditions as in Example 1. The obtained pellets had a melting point of 220 ° C.
  • the obtained pellets were melt-kneaded and injection molded under the same conditions as in Example 1 except that the cooling time was 20 seconds, and the nose pad (1), the spectacle molded body (10), and the spectacle molded body (20 )
  • Example 1 In the same manner as in Example 1, except that 100 parts by weight of poly L-lactic acid (manufactured by Nature Works: 4032B, weight average molecular weight 160,000, melting point 160 ° C.) was used instead of stereocomplex polylactic acid (component A). Pellets were obtained. The obtained pellets had a melting point of 170 ° C.
  • poly L-lactic acid manufactured by Nature Works: 4032B, weight average molecular weight 160,000, melting point 160 ° C.
  • component A stereocomplex polylactic acid
  • the obtained pellets were melt-kneaded and injection molded under the same conditions as in Example 1 except that the cooling time was 120 seconds, and the nose pad (1), the spectacle molded body (10), and the spectacle molded body ( 20) was obtained.
  • Comparative Example 2 Using the same material as in Comparative Example 1, pellets were obtained under the same conditions. The obtained pellets were melt-kneaded and injection molded under the same conditions as in Comparative Example 1 except that the mold temperature was 40 ° C. and the cooling time was 30 seconds, and the nose pad (1) and the spectacle molded body (10) And the spectacles molding (20) was obtained.
  • Example 1 using stereocomplex polylactic acid (component A) having excellent crystallinity, crystallization progresses sufficiently in a short cooling time of 30 seconds at the time of injection molding, and a desired molded body (10) is obtained. Obtained.
  • Example 3 by using polylactic acid (component A) and polybutylene terephthalate resin (component E) in combination, the desired molded article (10) could be obtained in a shorter cooling time of 20 seconds.
  • Comparative Example 1 using poly L-lactic acid instead of stereocomplex polylactic acid (component A), when the mold temperature is 110 ° C., which is the same as the example, a desired molded body (10) is obtained. Therefore, a cooling time of 120 seconds was required. In Comparative Example 2, the mold temperature was lowered to 40 ° C. in order to set the cooling time to 30 seconds. However, the obtained molded article (10) had poor surface scratch resistance.

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Abstract

La présente invention a trait à : un article moulé de lunettes composé essentiellement d'un acide polylactique et présentant une excellente résistance à la chaleur ; un procédé de fabrication de cet article moulé de lunettes qui présente une excellente aptitude au moulage ; et des lunettes comportant l'article moulé de lunettes. La présente invention a trait en particulier à : un article moulé de lunettes qui comprend une composition de résine d'acide polylactique stéréocomplexe contenant au moins 60 % en poids d'acide polylactique stéréocomplexe (constituant A) ; un procédé de fabrication d'un article moulé de lunettes, qui comprend la fusion et le malaxage d'une composition de résine d'acide polylactique stéréocomplexe contenant au moins 60 % en poids d'acide polylactique stéréocomplexe (constituant A), ainsi que l'injection de la résine fondue, la température du moule étant comprise entre 80 et 130 °C et la durée de refroidissement entre 10 et 60 secondes ; et des lunettes qui comportent cet article moulé de lunettes.
PCT/JP2010/066362 2009-10-09 2010-09-22 Article moulé de lunettes, procédé de fabrication de cet article moulé et lunettes WO2011043187A1 (fr)

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JP2009-235538 2009-10-09
JP2009235538A JP2011080015A (ja) 2009-10-09 2009-10-09 眼鏡成形体、その製造方法、及び眼鏡

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8901215B2 (en) 2011-12-16 2014-12-02 Fuji Xerox Co., Ltd. Resin composition and resin molded article
CN106273573A (zh) * 2016-04-14 2017-01-04 王道敏 一种眼镜框面压3d花纹新工艺
WO2017083999A1 (fr) * 2015-11-19 2017-05-26 王道敏 Procédé de fabrication de monture de lunettes
CN113977874A (zh) * 2021-10-27 2022-01-28 深圳市观达眼镜有限公司 塑胶镜腿的生产方法

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KR101569247B1 (ko) * 2013-06-19 2015-11-13 롯데케미칼 주식회사 결정화 속도가 향상된 폴리유산 스테레오 복합수지 조성물 및 이의 성형방법
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CN113977874A (zh) * 2021-10-27 2022-01-28 深圳市观达眼镜有限公司 塑胶镜腿的生产方法

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