WO2023162326A1 - Article moulé en résine et procédé de fabrication d'article moulé en résine - Google Patents

Article moulé en résine et procédé de fabrication d'article moulé en résine Download PDF

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Publication number
WO2023162326A1
WO2023162326A1 PCT/JP2022/038272 JP2022038272W WO2023162326A1 WO 2023162326 A1 WO2023162326 A1 WO 2023162326A1 JP 2022038272 W JP2022038272 W JP 2022038272W WO 2023162326 A1 WO2023162326 A1 WO 2023162326A1
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Prior art keywords
resin
thermoplastic
phase
thermoplastic resin
resin molding
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PCT/JP2022/038272
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English (en)
Japanese (ja)
Inventor
晃寛 山口
聡 荒井
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株式会社日立製作所
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Priority to CN202280079770.2A priority Critical patent/CN118339236A/zh
Publication of WO2023162326A1 publication Critical patent/WO2023162326A1/fr

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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
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/015—Biocides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/02—Starch; Degradation products thereof, e.g. dextrin
    • 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

Definitions

  • the present invention relates to a resin molded article and a method for manufacturing a resin molded article.
  • Plastics are used in a wide range of applications.
  • bioplastics generally term for plastics made from biomass and biodegradable plastics
  • Patent Document 1 a resin composition containing at least four components of a biodegradable polylactic acid resin, an aliphatic polyester resin, starch, and a plasticizer that plasticizes starch is used in a predetermined weight ratio. is described.
  • a first phase containing a first thermoplastic resin as a main component; a second phase comprising a thermoplastic starch; A third phase containing the second phase and containing a second thermoplastic resin as a main component; A resin molding comprising:
  • a resin molding comprising:
  • the resin molding is a first phase containing a first thermoplastic resin as a main component; a second phase comprising the thermoplastic starch as a main component;
  • a method comprising:
  • the resin molding of the present disclosure can be manufactured at low cost.
  • FIG. 1 is a schematic cross-sectional view of an example of an injection molding apparatus used for manufacturing a resin molded article according to an embodiment.
  • FIG. 2 is a scanning electron microscope image (SEM image) of a cross section of the resin molding of Example 1.
  • FIG. 3 is a cross-sectional SEM image of the resin molding of Comparative Example 2.
  • FIG. 4 is a cross-sectional SEM image of the resin molding of Example 6.
  • FIG. FIG. 5 is a graph showing the tensile strength of resin moldings of Examples 1 and 6 and Comparative Examples 1 and 2.
  • FIG. FIG. 6 is a graph showing the flexural strength of the resin moldings of Examples 1 and 6 and Comparative Examples 1 and 2; FIG.
  • FIG. 7 is a graph showing the impact strength of the resin moldings of Examples 1, 2, 6 and 7 and Comparative Examples 1-4.
  • FIG. 8 is a graph showing the impact strength of the resin moldings of Examples 2 to 7 and Comparative Examples 3 and 4, showing the relationship between the impact strength and the ratio of the TPS content to the PBS content.
  • 9 is a photograph showing the appearance of the resin molding of Example 6.
  • FIG. 10 is a photograph showing the appearance of the resin molding of Example 8.
  • FIG. FIG. 11 is a photograph showing the appearance of the resin moldings of Examples 9-11.
  • FIG. 12 is a photograph showing the appearance of resin moldings of Examples 12-14.
  • FIG. FIG. 15 is a graph showing the impact strength of the resin moldings of Examples 9-11.
  • the resin molding according to the first embodiment includes a first phase containing a first thermoplastic resin as a main component, a second phase containing thermoplastic starch (hereinafter referred to as TPS), and a second thermoplastic resin. and a third phase containing as a main component.
  • the second phase is contained in the third phase.
  • the second phase is also referred to as the embedding phase
  • the third phase is also referred to as the coating phase, as appropriate.
  • the first phase, the second phase, and the third phase are phases constituting a microphase-separated structure.
  • the first phase and the third phase can form a microphase separation structure such as a sea-island structure, a cylinder structure, a co-continuous structure, and a layered structure.
  • one of the first or third phase may be the matrix phase (continuous phase) and the other the dispersed phase.
  • the first phase may be the matrix phase and the third phase the dispersed phase.
  • the second phase preferably contains TPS as a main component, more preferably consists of TPS.
  • “comprising” means that additional components may be included, and includes “comprising as a main component" and “consisting of”.
  • “Contained as a main component” means that the content of the component is 50% by weight or more, 70% by weight or more, 80% by weight or more, or 90% by weight or more of the total weight. "Consisting of” means including only the listed ingredients, but does not exclude the inclusion of inevitable impurities.
  • the TPS may contain starch and a plasticizer. TPS can be obtained by mixing starch and plasticizer.
  • Starch may be derived from plants, for example, cereals such as corn, wheat, and rice; beans such as fava beans, mung beans, and adzuki beans; potatoes, such as potatoes, sweet potatoes, and tapioca; It may be derived from palms such as sago palm.
  • a plasticizer may be a compound having a functional group capable of forming a hydrogen bond with the functional group of starch, such as a hydroxyl group, an amino group, or a carboxyl group.
  • plasticizers include glycols such as glycerin, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, butylene glycol, polyglycerin, thiodiglycol, glucose, fructose, sucrose, galactose, maltose, lactose, trehalose.
  • sugars such as sorbitol, maltitol, xylitol, erythritol, mannitol, lactitol and other sugar alcohols, sugar derivatives such as sucralose, hydroxy acids such as tartaric acid, polyhydric alcohols such as polyvinyl alcohol, trehalose and polyhydroxy(meth)acrylate , polyvalent amines such as urea and thiourea, polyvalent carboxylic acids such as hyaluronic acid, polyvinylpyrrolidone, and mixtures thereof.
  • TPS is biomass-derived, biodegradable, and inexpensive. Therefore, the resin molding according to the present embodiment can contribute to carbon neutrality, at least a part of which is biodegradable, and can be manufactured at low cost.
  • TPS is a highly water-absorbing material, but in the resin molding according to the present embodiment, TPS is embedded in the second thermoplastic resin, so the resin molding can have high moisture resistance. .
  • Non-thermoplasticized granular starch may clog the screw during compounding or when used in an injection molding device as described later, but pelletized TPS does not have such a risk. Therefore, the resin molding according to the present embodiment containing TPS can be manufactured by injection molding as described later.
  • the first thermoplastic resin and the second thermoplastic resin are respectively, for example, polypropylene (PP), polyethylene (PE), polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylate (PMMA) , polylactic acid (PLA), polybutylene succinate (PBS), hydroxybutyrate hydroxyhexanoate (PHBH), polyhydroxyalkanoic acid (PHA), polybutylene succinate adipate (PBSA), polybutylene adipate terephthalate (PBAT) , polyvinyl alcohol (PVA).
  • PP polypropylene
  • PE polyethylene
  • PS polystyrene
  • ABS acrylonitrile-butadiene-styrene copolymer
  • PMMA polymethyl methacrylate
  • PMMA polymethyl methacrylate
  • PLA polylactic acid
  • PBS polybutylene succinate
  • PHBH hydroxybutyrate hydroxyhe
  • At least one of the first thermoplastic resin and the second thermoplastic resin may be biodegradable. Thereby, all or part of the resin molding can have biodegradability.
  • biodegradable resins include PLA, PBS, PHBH, PHA, PVA, PBSA, and PBAT.
  • At least one of the first thermoplastic resin or the second thermoplastic resin may be a polyester such as PLA, PBS, PHBH, PHA, PBSA, and PBAT.
  • At least one of the first thermoplastic resin and the second thermoplastic resin may be a biodegradable polyester.
  • At least one of the first thermoplastic resin and the second thermoplastic resin may be a mixture of a non-biodegradable thermoplastic resin and a biodegradation accelerator.
  • Biodegradation accelerators may be, for example, microorganisms involved in biodegradation, enzymes, substances that attract microorganisms, substances that promote hydrolysis of resins. Thereby, all or part of the resin molding can have biodegradability.
  • At least one of the first thermoplastic resin and the second thermoplastic resin may be derived from biomass. Thereby, carbon neutrality can be improved.
  • biomass-derived resins include biomass-derived PLA, PBS, PHBH, PHA, PE, PP, and PS.
  • the first thermoplastic resin and the second thermoplastic resin may be crystalline resins or non-crystalline resins, respectively.
  • both the first thermoplastic resin and the second thermoplastic resin preferably have a melting point of 210° C. or lower.
  • the first thermoplastic resin and the second thermoplastic resin are amorphous resins, the first thermoplastic resin and the second thermoplastic resin both have a glass transition point of 150 ° C. or less and 210 C. or lower, that is, the melt flow rate at 210.degree. C. or lower is preferably 0.5 g/10 min or more. As a result, it becomes possible to produce the resin molded article at a molding temperature of 210° C.
  • the melting point refers to the temperature at the apex of the melting peak of the DSC curve obtained by differential scanning calorimetry (DSC) in accordance with JIS K7121:2012.
  • the glass transition temperature is any of the midpoint glass transition temperature (Tmg), the extrapolated glass transition start temperature (Tig), or the extrapolated glass transition end temperature (Teg) measured in accordance with JIS K7121:2012. point to In the present application, melt flow rate is the amount of resin extruded from a die per 10 minutes, measured according to either JIS K7210, JIS K7390, ISO 1133, or ASTM D1238.
  • the elastic modulus of the second thermoplastic resin is preferably smaller than the elastic modulus of the first thermoplastic resin. Thereby, the resin molding can have high impact strength.
  • the third phase may further contain one or more thermoplastic resins in addition to the second thermoplastic resin.
  • thermoplastic resins are the same as the examples of the first thermoplastic resin and the second thermoplastic resin described above.
  • the solubility parameter value (SP value) sp1 of the first thermoplastic resin, the SP value sp2 of the second thermoplastic resin, and the SP value sp3 of the TPS may satisfy sp1 ⁇ sp2 ⁇ sp3 or sp3 ⁇ sp2 ⁇ sp1. Thereby, it becomes possible to easily form a structure including a covering phase and an embedding phase. Moreover, since the first phase and the third phase are mixed with good dispersibility, the difference between sp1 and sp2 may be 1.0 (J/cm 3 ) 0.5 or less. Additionally or alternatively, the resin molding may contain a compatibilizer. Examples of the compatibilizing agent include compounds having a carbodiimide group (such as "Carbodilite” manufactured by Nisshinbo Chemical Co., Ltd.).
  • thermoplastic resin PLA
  • thermoplastic resin PBS, PBSA, or PBAT
  • sp1, sp2, and sp3 satisfy the above conditions.
  • the SP value in the present invention may be obtained by a method of estimating from the molecular structure of the compound or a method of estimating from the physical property values of the compound.
  • methods for estimation from the molecular structure of a compound include Small's calculation method, Rheineck and Lin's calculation method, Krevelen and Hoftyzer's calculation method, Fedors' calculation method (RF Fedors, Polym. Eng. Sci., 14 (2), 147 (1974)), Hansen's calculation method (CM Hansen, J. Paint Technol., 39., (505), 104 (1967)), and Hoy's calculation method (HL. Hoy, J. Paint Technol., 42 (540), 76 (1970)).
  • Examples of the method of estimating from the physical property values of the compound include the method of determining from the latent heat of vaporization, the method according to the Hildebrand Rule (J. Hildebrand and R. Scott, "The Solubility of Non-electrolytes", 3rd Ed., pp. 119-133, Reinhold Publishing Corp. (1949)), a method based on surface tension, a method based on solubility, a method based on refractive index, and a method based on other physical property values.
  • the resin molding according to the present embodiment is more than 0 weight percent and less than 50 weight percent, preferably 5 to 40 weight percent, or more, with respect to the total weight of the first thermoplastic resin, the second thermoplastic resin, and the TPS.
  • TPS may be included in an amount of 8 to 40 weight percent.
  • the resin molded product according to the present embodiment has a second thermoplastic resin and a TPS of more than 0 and less than 3.33, preferably 0.17 to 2.3, more preferably 0.18 to 2.22. It may be contained in a weight ratio (TPS/second thermoplastic resin).
  • TPS weight ratio
  • Such contents of the first thermoplastic resin, the second thermoplastic resin, and the TPS make it possible to easily form a structure including a coating phase and an embedding phase.
  • the resin molding according to this embodiment may further contain additives.
  • the additive is preferably a material that does not promote yellowing of TPS or react with TPS to gel.
  • the additive is preferably a material not derived from petroleum, such as an inorganic substance.
  • a coloring agent is an example of an additive.
  • inorganic particles such as calcium carbonate and titanium oxide can be used as a coloring agent for whitening resin moldings.
  • the inorganic particles may have a particle size of 1 ⁇ m or less, which can increase the crystallization rate of the first thermoplastic resin (eg, PLA).
  • Antibacterial agents are another example of additives.
  • a resin molding containing an antibacterial agent prevents or reduces microbial contamination in the environment in which it is used, and thus can be applied to food-related applications (for example, food containers).
  • Examples of antimicrobial agents suitable for food-related applications include antimicrobial agents based on silver-based inorganic compounds or zinc oxide-based compounds.
  • the content of the antibacterial agent may be appropriately set according to the mechanical properties of the resin molding, etc. For example, 0 .1 to 1.0 parts by weight.
  • additives include fillers, heat stabilizers, lubricants, release agents, nucleating agents, photodegradants, biodegradation accelerators, antioxidants, UV stabilizers, antistatic agents, flame retardants, and deodorants. agents.
  • the resin molding according to this embodiment may have an impact strength of 3 kJ/m 2 or more, preferably 4 kJ/m 2 or more. Such a high impact strength can be achieved by the structure including the coating phase and the embedding phase described above. Further, the resin molding according to the present embodiment may have a tensile strength of 30 MPa or more, preferably 40 MPa or more, and a bending strength of 40 MPa or more, preferably 50 MPa or more. A resin molding having such excellent mechanical properties can be used for various purposes as a compatible material for PP, ABS resin, and the like.
  • the resin molding according to this embodiment may have any shape and size.
  • the resin molded article according to this embodiment may have a thickness of 0.5 mm or more, and such a resin molded article can be suitably manufactured by the injection molding process described below.
  • the injection molded article can have any shape, including complex shapes.
  • the resin molding according to the present embodiment may be in the form of a film having a thickness of less than 0.5 mm, and such a resin molding can be suitably produced by an inflation molding process, an extrusion molding process, a compression molding, or the like. .
  • a method for manufacturing a resin molding according to this embodiment will be described.
  • a method for producing a resin molded product includes performing injection molding using pellets containing TPS.
  • a method of manufacturing a resin molding using the injection molding apparatus shown in FIG. 1 will be described below.
  • raw material pellets 104 are supplied to the hopper 103 of the injection molding device 100 .
  • the raw material pellets 104 include pellets containing TPS.
  • the pellet containing TPS may be a pellet containing TPS as a main component, or a compound pellet containing at least one of the first thermoplastic resin or the second thermoplastic resin and TPS.
  • TPS-based pellets can be made by feeding the starch and plasticizer into an extrusion apparatus, mixing, extruding, and cutting. Commercially available TPS pellets can also be used.
  • compound pellets containing at least one of the first thermoplastic resin or the second thermoplastic resin and TPS supplying at least one of the first thermoplastic resin or the second thermoplastic resin and the TPS pellets to an extrusion molding device and mixing; It can be produced by extrusion and cutting.
  • the raw material pellets 104 are pellets containing TPS, and at least one of pellets of the first thermoplastic resin, pellets of the second thermoplastic resin, or compound pellets containing the first thermoplastic resin and the second thermoplastic resin. may further include Additionally, additives may be supplied to the hopper 103 as needed.
  • the screw 102 is retracted by the motor 101 to introduce the raw material pellets 104 from the hopper 103 into the cylinder 106 .
  • the heater 105 heats the material pellets 104 while rotating the screw 102 to melt the material pellets 104 .
  • the temperature (molding temperature) of the heater 105 is preferably 230° C. or lower, more preferably 210° C. or lower. Thereby, thermal deterioration and yellowing of TPS can be prevented or reduced.
  • a supercritical fluid such as nitrogen or carbon dioxide may be further introduced into the cylinder 106 and mixed with the molten material of the raw material pellets 104 . As a result, it becomes easy to manufacture a resin molded article having a small thickness and a resin molded article having a complicated shape.
  • the screw 102 is advanced by the motor 107 to inject the molten material in the cylinder 106 into the mold 109 through the nozzle 108 .
  • additional melt is fed into mold 109 under a predetermined pressure to compensate for volumetric shrinkage due to subsequent solidification of the melt.
  • the melt is cooled to a solidification temperature or lower and solidified.
  • the mold clamping mechanism 111 is driven by the motor 110 to open the mold 109 .
  • the ejector mechanism 113 is driven by the motor 112 to eject the solidified product (resin molded product) from the mold 109 .
  • the mold 109 is closed in preparation for the next injection molding.
  • the resin molding according to the first embodiment is produced.
  • a resin molding according to the second embodiment includes a first phase containing a first thermoplastic resin as a main component and a second phase containing TPS as a main component.
  • One of the first or second phase is the matrix phase (continuous phase) and the other is the dispersed phase.
  • the resin molding according to the second embodiment may further contain additives.
  • the resin molding according to the second embodiment contains TPS, which is biomass-derived, biodegradable, and inexpensive. Therefore, the resin molding can contribute to carbon neutrality, at least a part of which can be biodegradable, and can be manufactured at low cost.
  • the first thermoplastic resin TPS, and additives
  • the same ones as the first thermoplastic resin, TPS, and additives that can be used in the first embodiment can be used, so detailed description is given here. are omitted.
  • the first thermoplastic resin may be a polyolefin.
  • the resin molding according to this embodiment may have any shape and size.
  • the resin molded product according to this embodiment may have a thickness of 0.5 mm or more, and such a resin molded product can be suitably manufactured by an injection molding process.
  • the resin molded article of this embodiment can be produced by the same method as the resin molded article production method of the first embodiment, except that the raw material pellets 104 do not contain the second thermoplastic resin.
  • PLA pellets ("L105" manufactured by TOTAL) were supplied to an injection molding machine equipped with a plurality of heaters, and injection molding was performed to obtain a resin molding.
  • the temperature of the plurality of heaters was 180 to 200° C., and the closer to the injection nozzle, the higher the temperature.
  • Comparative example 2 PLA pellets, PBS pellets (Mitsubishi Chemical Co., Ltd. "FZ71PB”), and compatibilizer (Nisshinbo Chemical Co., Ltd. "Carbodilite”) in the amounts shown in Table 1 are supplied to an extruder and heated to 160 to 180 ° C. Extrusion was performed at temperature to obtain compound pellets. The compound pellets were supplied to an injection molding machine and injection molded to obtain a resin molding. The temperature of the plurality of heaters of the injection molding machine was set to 180 to 200° C., and the closer to the injection nozzle, the higher the temperature.
  • Examples 1 to 7 and Comparative Examples 3 and 4 The amounts of PLA pellets, PBS pellets, TPS pellets, and carbodilite shown in Table 1 were supplied to an extruder and extruded at a temperature of 160 to 180° C. to obtain compound pellets.
  • the compound pellets were supplied to an injection molding machine and injection molded to obtain a resin molding.
  • the temperature of the plurality of heaters of the injection molding machine was set to 180 to 200° C., and the closer to the injection nozzle, the higher the temperature.
  • Example 8 A resin molding was produced in the same manner as in Example 6, except that the amount of titanium oxide shown in Table 1 was supplied to the injection molding machine in addition to the compound pellets.
  • Examples 9-11 A resin molding was produced in the same manner as in Example 6, except that the temperatures (molding temperatures) of the plurality of heaters of the injection molding machine were set to the temperatures shown in Table 2.
  • Examples 12-14 PP pellets, TPS pellets, and a compatibilizer (maleic anhydride-modified PP) in the amounts shown in Table 3 were supplied to an extruder and extruded at a temperature of 160 to 180 ° C. to obtain compound pellets. .
  • the compound pellets were supplied to an injection molding machine and injection molded to obtain a resin molding.
  • the temperatures (molding temperatures) of the plurality of heaters of the injection molding machine were set to the temperatures shown in Table 3.
  • Reference examples 1 and 2 The PLA pellets were supplied to an injection molding machine and injection molded to obtain a resin molding.
  • the temperature of the plurality of heaters of the injection molding machine was set to 180 to 200° C., and the closer to the injection nozzle, the higher the temperature.
  • the injection molding pressure was low in Reference Example 1 and high in Reference Example 2.
  • Reference example 3 A resin molded product was produced in the same manner as in Reference Example 2, except that supercritical CO 2 was mixed with the melt of PLA pellets and injection molded in an injection molding machine.
  • FIGS. 2, 3, 4 and 14 (2) Structural Observation Scanning electron microscope images (SEM images) of cross sections of resin moldings of Example 1, Comparative Example 2, Example 6 and Comparative Example 4 are shown in FIGS. 2, 3, 4 and 14, respectively.
  • the resin molding of Example 1 had a sea phase (continuous phase) containing PLA and island phases (dispersed phase) containing TPS dispersed in the sea phase.
  • the resin molding of Comparative Example 2 had a sea phase containing PLA and an island phase containing PBS dispersed in the sea phase.
  • the resin molding of Example 6 has a sea phase containing PLA and island phases dispersed in the sea phase, and the island phases are covered with a coating phase containing PBS and covered with the coating phase. It had a fine embedded phase containing embedded TPS.
  • the PLA-containing phase, the TPS-containing phase, and the PBS-containing phase were dispersed mottledly.
  • the bending strength of the resin moldings of Examples 1 and 6 and Comparative Examples 1 and 2 was measured according to ISO178. The results are shown in FIG.
  • the resin moldings of Examples 1 and 6 had lower bending strengths than the resin moldings of Comparative Examples 1 and 2, but both had sufficiently high bending strengths of 50 MPa or more.
  • the impact strength of the resin moldings of Examples 1-7 and Comparative Examples 1-4 was measured based on ISO180. The results are shown in FIGS. 7 and 8. FIG. Also, the impact strength of the resin moldings of Examples 9 to 11 was measured based on ISO180. The results are shown in FIG.
  • the resin molded article of Example 1 containing PLA and TPS exhibited impact strength equivalent to that of the resin molded article of Comparative Example 1 consisting of PLA.
  • the resin moldings of Examples 2, 6, and 7 containing PLA, PBS, and TPS with a TPS content of 5 to 40 weight percent exhibited high impact strength exceeding 4 kJ/m 2 .
  • the resin moldings of Comparative Examples 3 and 4 in which the TPS content was 50% by weight or more showed significantly lower impact strength than the resin moldings of Examples 2, 6, and 7.
  • the resin moldings of Examples 2 to 7 had high impact strength by having a sea phase containing PLA, a coating phase containing PBS, and an island phase containing an embedded phase containing TPS as shown in FIG. It is thought that it had The resin moldings of Comparative Examples 3 and 4, which had a TPS content of 50% by weight or more and a ratio of the TPS content to the PBS content of 3.33 or more, were, as shown in FIG. Since it did not contain a sufficient amount of PBS to coat the , the coating phase and the embedding phase were not formed, and the TPS phase became coarse and did not take a dispersed structure. As a result, it is considered that the significantly low impact strength was exhibited.
  • the impact strengths of the resin moldings of Examples 9 and 10 were 5 kJ/m 2 and 5.1 kJ/m 2 , respectively, while the impact strength of the resin molding of Example 11 was 4 kJ/m 2 . .2 kJ/ m2 .
  • Fig. 11 shows photographs of the appearance of the resin moldings of Examples 9 to 11.
  • Fig. 12 shows photographs of the appearance of the resin moldings of Examples 12 to 14.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un article moulé en résine contenant des bioplastiques qui peut être fabriqué à faible coût.　L'article moulé en résine comprend une première phase qui contient une première résine thermoplastique en tant que composant principal, une deuxième phase qui contient de l'amidon thermoplastique, et une troisième phase qui encapsule la deuxième phase et contient une deuxième résine thermoplastique en tant que composant principal.
PCT/JP2022/038272 2022-02-24 2022-10-13 Article moulé en résine et procédé de fabrication d'article moulé en résine WO2023162326A1 (fr)

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CN202280079770.2A CN118339236A (zh) 2022-02-24 2022-10-13 树脂成型物以及树脂成型物的制造方法

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JP2022026754A JP2023122968A (ja) 2022-02-24 2022-02-24 樹脂成形物、及び樹脂成形物の製造方法
JP2022-026754 2022-02-24

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JP2020503417A (ja) * 2016-12-29 2020-01-30 バイオロジック インコーポレイテッドＢｉｏｌｏｇｉｑ，Ｉｎｃ． 炭水化物系ポリマー材料
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