JP7279090B2 - Molded product of container or flat plate and method for producing resin pellets thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a molded product of a container or a flat plate, and a method for producing resin pellets. In particular, it relates to biodegradable moldings and resin pellets.

Conventionally, synthetic plastics such as PP, PE, PET, PC, PMMA, PS, COP, and COC have been used as resin materials for molding. At present, these chemically synthesized plastics have the problems of carbon dioxide generation and environmental pollution, but these problems are almost ignored when they are used.

Under these circumstances, resin compositions made from components of natural materials such as plants have been developed so as not to generate carbon dioxide during production. Also, a biodegradable resin composition has been developed that is degraded into low-molecular-weight compounds that do not adversely affect the environment through the involvement of microorganisms. PLA (polylactic acid) is an example of a biodegradable resin composition that is a plant-derived material. Patent Document 1 discloses a molded product using polylactic acid.

JP 2016-179694 A

However, since PLA is made from corn or sugar cane, it emits little CO ₂ , but has the problem of requiring many production processes and high production costs. Also, PLA is a material that does not biodegrade unless it is at a temperature of 50° C. or higher. Therefore, no biodegradability is obtained in the discarded environment. In addition, there is a problem that moldings such as beverage containers such as cups, which have poor heat resistance, are deformed when hot water is poured into them. In addition, it is weak in strength, and if the molded product is dropped, bent, or pushed, cracks, scratches, or breakage may occur. Furthermore, when it is attempted to produce a molded product by injection molding, PLA has poor fluidity, which results in a long cycle time for injection molding, and problems in mass production of molded products, such as easy occurrence of injection molding defects. In other words, conventional PLA has problems in terms of heat resistance, hardness, cost and biodegradability.

As a result of intensive research by the present inventors, by applying an amorphous resin material component extracted from plant-derived wood, a resin composition for molding that is excellent in terms of heat resistance, hardness, cost, and biodegradability has been developed. offer. Also provided is a molding method using this resin composition.

The molding resin composition of the present embodiment contains a plant-derived first resin represented by the following structural formula (Formula 1).

It is preferable that the resin composition for molding further contains a second resin of the following structural formula (Formula 2).

Resin compositions for molding further include polycarbonate (PC), cyclic olefin polymer (COP), cyclic olefin copolymer (COC), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), ABS Resin (ABS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinyl acetate (PVAC), polymethylpentene (PMP), polybutene (PB), hydroxybenzoic acid polyester (HBP), polyetherimide ( PEI), polyacetal (POM), polyphenylene ether (PPE), polyphenylene oxide (PPO), polyphenylene sulfide (PPS), polyurethane (PUR), ionomer resin (IO), fluororesin (FR), polytetrafluoroethylene (PTFE) ), polycyclohexylene dimethylene terephthalate (PCT), polyethylene naphthalate (PEN), polyarylate (PAR), polyacrylonitrile (PAN), polyallylsulfone (PASF), polyamide (PA), polyvinyl alcohol (PVA), Polymethacrylstyrene (MS), butadiene resin (BDR), polybutylene terephthalate (PBT), polyester carbonate (PPC), polybutylene succinate (PBS), norbornene resin (NB), polyamide (nylon) (PA), Teflon ( registered trademark), fiber reinforced plastic (FRP), polyhydroxyalkanoic acid (PHA), polyhydroxybutyric acid (PHB), hydroxybutyric acid/hydroxyhexanoic acid copolymer (PHBH), acetylcellulose (CA), polyimide (PI), Polyamideimide (PAI), polysulfone (PSF), polyethersulfone (PES), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polychlorotrifluoroethylene (PCTFE), silicone resin (SI), epoxy resin ( EP) and polylactic acid (PLA). or a plurality of them. In this case, it is preferable that the first resin is 30 to 60% by weight and the second resin is 40 to 70% by weight.

In addition, wood powder or wood pellets made by freezing and pulverizing trees, bamboo or grass into powder or pellet form, bamboo powder or bamboo pellets, grass powder or grass pellets, or paper made by freezing and pulverizing paper into powder The powder may be kneaded with the first resin, or may be kneaded with the first resin and the second resin. Since these are very inexpensive, it is possible to reduce the cost of the kneaded resin pellets themselves, and a reduction in price can be expected. If wood powder, wood pellets, bamboo powder, bamboo pellets, grass powder, grass pellets, paper powder, or paper pellets are mixed with the second resin as they are, the heat resistance, strength, and fluidity will deteriorate, but they will be kneaded with the first resin. As a result, heat resistance, strength and fluidity are improved, and biodegradability is also obtained. Also in this case, it is preferable that the first resin is kneaded in an amount of 30 to 60% by weight.

The molding method of the resin composition of the present embodiment includes a step of charging the solidified resin composition into the resin injection part, a step of heating and compressing the resin composition in the resin injection part to liquefy, and a step of liquefying. The resin composition is pressurized and injected from the resin injection part into the mold part, and the resin composition is cooled and solidified in the mold part, and the molded product is removed from the mold part.
Furthermore, it is preferable to include a step of introducing a gas into the liquefied resin composition and diffusing the gas into the resin composition.

The resin composition of the present invention is excellent in heat resistance, hardness, cost and biodegradability.

1 is a conceptual diagram of molding an injection-molded product using an injection molding machine 10 and a mold 50 (without gas); FIG. 1 is a conceptual diagram of molding an injection-molded product using an injection molding machine 10 and a mold 50 (with gas); FIG.

<Hemicellulose and hemicellulose derivative>
The resin composition in this embodiment contains a plant-derived resin component. This resin component is one of the components that mainly constitute wood. Wood is primarily composed of three components: cellulose, hemicellulose, and lignin. The component of the first resin of this embodiment is hemicellulose. Hemicellulose is amorphous and very uniform, and the liquid after melting has good fluidity and is suitable as an injection molding material. Cellulose is highly crystalline and fibrous, and is not suitable as a main component of injection molding materials. Lignin is also highly crystalline and poor in fluidity, so it is not suitable as a main component of injection molding materials. Hemicellulose is the only amorphous material that can flow uniformly inside the cylinder in injection molding when liquefied.

Hemicellulose includes complex polysaccharides such as mannan, glucan, xylan, and xyloglucan. Any of these can be used in this embodiment. In addition, the hemicellulose may contain a small amount of cellulose or a small amount of lignin. Among the hemicelluloses preferably xylan is used. The molecular weight (weight-average molecular weight Mw) of hemicellulose is generally 1,000 to 100,000, and when the molecular weight is 30,000 to 100,000, the molded product obtained by injection molding has good strength.

Hemicellulose has good biodegradability. Hemicellulose has a faster biodegradation rate than cellulose and lignin, and is also biodegradable at low temperatures, eg, 5 degrees Celsius to high temperatures. Even at room temperature, hemicellulose is decomposed by microorganisms and becomes water and carbon dioxide after 3 months. When buried in soil, hemicellulose is degraded by microorganisms in the soil. Even in seawater, hemicellulose is decomposed by microorganisms. Hemicellulose is an environmentally friendly material.

Since hemicellulose is a component of wood, chemical synthesis itself is unnecessary. That is, the plant-derived tree consumes carbon dioxide through photosynthesis without generating carbon dioxide associated with chemical synthesis of raw materials. Utilization of hemicellulose as the first resin in injection molding compositions reduces carbon dioxide generation.

Hemicellulose, which is the basic structure of hemicellulose as the first resin, has the following structural formula (Formula 1). Molecular structures containing the following structures can be used in this embodiment.

R1 and R2 represent substituents. R1 and R2 are hydrogen, nitrogen, alkyl group, acetyl group, hydroxy group, acyl group, aldehyde group, amino group, imino group, aryl group, phosphonyl group, propenyl group, propanyl group, acetonyl group, carbonyl group, Carboxyl group, cyano group, azo group, azide group, thiol group, sulfo group, nitro group, vinyl group, allyl group, cycloalkyl group, phenyl group, naphthyl group, araalkyl group, benzyl group, Schiff group, alkylene group, amyl group, acetamidomethyl group, adamantyl group, adamantyloxycarbonyl group, allyloxycarbonyl group, tert-butoxycarbonyl group, benzyloxymethyl group, biphenylisopropyloxycarbonyl group, benzoyl group, benzyloxycarbonyl group, cyanoethyl group, cyclo xyl group, carboxymethyl group, cyclopentadienyl group, pentamethylcyclopentadienyl group, cyclohexyl group, glucose, hexyl group, isobutyl group, isopropyl group, mesityl group, trimethylphenyl group, methoxymethyl group, mesitylene sulfonyl group, mesyl group, nosyl group, octadecylsilyl group, pivaloyl group, methoxybenzyl group, methoxyphenyl group, propyl group, ethoxymethyl group, trimethylsilyl group, trimethylsilylethoxymethyl group, cyamyl group, tert-butyl group, tert-butyl group dimethylsilyl group, tert-butyldiphenylsilyl group, triethylsilyl group, tetrahydropyranyl group, triisopropylsilyl group, tolyl group, tosyl group, triisopropylbenzenesulfonyl group, trityl group, trichloroethoxycarbonyl group, benzyloxycarbonyl group, methylene group, valeryl group, methoxy group, acetamide group, trimethylammonium group, diazo group, hydrocarbon group and the like, but not limited thereto. Substituents that include them in the structure may also be used. Fluorine, bromine, chlorine, iodine, etc., or substituents containing these in the structure may also be used. Further, it may be an ionizable substituent such as a cation or anion that forms an ionic liquid structure, or a substituent containing them in the structure. The substituent of R1 and the substituent of R2 may be different.

By including this basic structure, biodegradability is obtained, and heat resistance, strength, fluidity, and transparency are obtained. It can be injection molded, and the molding obtained by injection molding is biodegradable and has good heat resistance, strength, fluidity and transparency. Note that n is an integer of 2 or more. As will be described later, R1 and R2 are hydrogen when the hemicellulose component is extracted from wood chips. When R1 and R2 are hydrogen, it is called "hemicellulose." Hemicellulose itself, in which R1 and R2 are hydrogen, is highly hydrophilic and therefore easily absorbs moisture. If the water absorbency is high, depending on the intended use of the molded article, the dimensions, volume, and weight tend to change over time, which may be undesirable. In addition, depending on the use of the molded product, the strength, transparency or heat resistance of the molded product may deteriorate. In order to solve such a problem due to water absorption, it is preferable to change R in the hemicellulose molecule to a substituent such as the above-described substituent, acetyl group, acetonyl group, ionizable substituent. Hemicelluloses with various substituents other than hydrogen are called hemicellulose derivatives. In typical hemicellulose derivatives, R1 and R2 are acetyl groups.

<Preparation of hemicellulose and hemicellulose derivative>
Small pieces of wood are called wood chips. The wood chips are heated in an aqueous solution containing butanol. The liquid then separates into a phase of butanol and lignin and a phase of water and hemicellulose. Cellulose precipitates as a solid. A hemicellulose powder can be obtained by removing water from the water and hemicellulose phases. In this powdery hemicellulose, R1 and R2 in the structural formula of the basic structure are hydrogen. In this case, it is easy to take in moisture due to its high hydrophilicity. If the water absorbency is high, the dimension, volume and weight of the molded product tend to change with time, and the strength, transparency and heat resistance of the molded product itself may deteriorate.

Therefore, by performing an acetylation reaction on the hemicellulose itself, the hydrogens of R1 and R2 in the structural formula can be changed to acetyl groups, and a hemicellulose derivative can be produced. In addition to the acetyl group, these hemicellulose derivatives can be prepared by chemically changing R1 and R2 in the structural formula to substituents such as acetonyl group, propenyl group and carboxyl group. It is possible to make hemicellulose derivatives. Preparation of this hemicellulose derivative was carried out by a conventional sugar derivative preparation technique. This sugar derivative preparation technology is proposed by Yamagata University, Nippon Kayaku Co., Ltd., Horiba Estech Co., Ltd., Kobe Natural Chemicals Co., Ltd., or Hayashibara Co., Ltd., respectively.

<Resin composition for molding>
The first resin, hemicellulose itself or a hemicellulose derivative, itself becomes an injection-moldable resin composition and a resin pellet for injection molding. Also, the hemicellulose itself or the hemicellulose derivative, which is the first resin, can be mixed with the second resin. In order to obtain an injection-moldable resin composition, hemicellulose itself or powder of a hemicellulose derivative and powder of the second resin, pellets of the second resin, or the like are mixed, and the mixture is fed into an extrusion kneading device.

The extrusion kneading device melt-kneads the first resin and the second resin, and the kneaded resin composition is extruded in a cylindrical shape from a nozzle of the extrusion kneading device. By cutting the cylindrical resin with a pelletizer, resin pellets of the resin composition are produced. Resin pellets are resin strips with a diameter of 0.2-3 mm and a length of 0.2-5 mm.

The second resin is polycarbonate (PC), cyclic olefin polymer (COP), cyclic olefin copolymer (COC), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), polylactic acid (PLA). , ABS resin (ABS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinyl acetate (PVAC), polymethylpentene (PMP), polybutene (PB), hydroxybenzoic acid polyester (HBP), polyether Imide (PEI), polyacetal (POM), polyphenylene ether (PPE), polyphenylene oxide (PPO), polyphenylene sulfide (PPS), polyurethane (PUR), ionomer resin (IO), fluororesin (FR), polytetrafluoroethylene (PTFE), polycyclohexylene dimethylene terephthalate (PCT), polyethylene naphthalate (PEN), polyarylate (PAR), polyacrylonitrile (PAN), polyallylsulfone (PASF), polyamide (PA), polyvinyl alcohol (PVA) ), polymethacrylstyrene (MS), butadiene resin (BDR), polybutylene terephthalate (PBT), polyester carbonate (PPC), polybutylene succinate (PBS), norbornene resin (NB), polyamide (nylon) (PA), Teflon (registered trademark), fiber reinforced plastic (FRP), polyhydroxyalkanoic acid (PHA), polyhydroxybutyric acid (PHB), hydroxybutyric acid/hydroxyhexanoic acid copolymer (PHBH), acetylcellulose (CA), polyimide (PI ), polyamideimide (PAI), polysulfone (PSF), polyethersulfone (PES), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polychlorotrifluoroethylene (PCTFE), silicone resin (SI), epoxy Examples include resin (EP), but the material is not limited to these resins. Alternatively, a plurality of these resins may be used.
In addition, wood powder or wood pellets made by freezing and pulverizing trees, bamboo or grass into powder or pellets, bamboo powder or bamboo pellets, grass powder or grass pellets, or paper made by freezing and pulverizing paper into powder The powder may be kneaded with the first resin, or may be kneaded with the first resin and the second resin. Since these are very inexpensive, it is possible to reduce the cost of the kneaded resin pellets themselves, and a reduction in price can be expected. If wood powder, wood pellets, bamboo powder, bamboo pellets, grass powder, grass pellets, paper powder, or paper pellets are mixed with the second resin as they are, the heat resistance, strength, and fluidity will deteriorate, but they will be kneaded with the first resin. As a result, heat resistance, strength and fluidity are improved, and biodegradability is also obtained.

The second resin can also be mixed with a resin represented by the following structural formula (chemical formula 2). An example includes polymethyl methacrylate (PMMA, acrylic).

Here, R3 represents a substituent, hydrogen, nitrogen, alkyl group, acetyl group, hydroxy group, acyl group, aldehyde group, amino group, imino group, aryl group, phosphonyl group, propenyl group, propanyl group, acetonyl group. group, carbonyl group, carboxyl group, cyano group, azo group, azide group, thiol group, sulfo group, nitro group, vinyl group, allyl group, cycloalkyl group, phenyl group, naphthyl group, araalkyl group, benzyl group, Schiff group , amyl group, acetamidomethyl group, adamantyl group, adamantyloxycarbonyl group, allyloxycarbonyl group, tert-butoxycarbonyl group, benzyloxymethyl group, biphenylisopropyloxycarbonyl group, benzoyl group, benzyloxycarbonyl group, cyanoethyl group, cyclohexyl group, carboxymethyl group, cyclopentadienyl group, pentamethylcyclopentadienyl group, cyclohexyl group, glucose, hexyl group, isobutyl group, isopropyl group, mesityl group, trimethylphenyl group, methoxymethyl group , mesitylenesulfonyl group, mesyl group, nosyl group, octadecylsilyl group, pivaloyl group, methoxybenzyl group, methoxyphenyl group, propyl group, ethoxymethyl group, trimethylsilyl group, trimethylsilylethoxymethyl group, cyamyl group, tert-butyl group, tert -butyldimethylsilyl group, tert-butyldiphenylsilyl group, triethylsilyl group, tetrahydropyranyl group, triisopropylsilyl group, tolyl group, tosyl group, triisopropylbenzenesulfonyl group, trityl group, trichloroethoxycarbonyl group, benzyloxycarbonyl groups, methylene groups, valeryl groups, methoxy groups, acetamide groups, trimethylammonium groups, diazo groups, hydrocarbon groups, and the like, but are not limited to these. Fluorine, bromine, chlorine, iodine, etc., or substituents containing these in the structure may also be used. It may also be an ionizable substituent such as a cation or anion that forms an ionic liquid structure. It may be a substituent containing the above in the structure.

Q represents a single bond or a linking group, and when Q is a linking group, Q includes groups including an alkylene group, -O-, -NH2-, and a carbonyl group. A is a single bond, and examples of A include groups containing an alkylene group, -O-, -C(=O)O-, and the like. Note that n is an integer of 2 or more, R3 in a plurality of the above structural formulas may be the same or different, Q may be the same or different, and A and Q may be the same or different. may be The molecular weight (weight average molecular weight Mw) of the second resin is 1,000 to 10,000,000. is good.

Resin pellets of a resin composition composed of the first resin and the second resin are put into an injection molding apparatus, and moldings having various shapes can be obtained according to molding dies. When a molded article using the resin composition of the present embodiment is placed in soil or seawater, the first resin in the resin composition is mixed with the second resin at the molecular level. When the first resin is biodegraded by microorganisms or the like, the second resin itself is also degraded at the molecular level, and biodegradation progresses. That is, the first resin plays a role in imparting biodegradability to the second resin itself. It was completely unexpected that the first resin would play a role in imparting biodegradability to the second resin as well. This is something that a person skilled in the art of plastics, bioplastics, and biodegradable plastics cannot easily guess, and has been demonstrated in the experiments of the examples of this invention. It is thought that the molecules of the second resin themselves biodegrade more easily when the first resin biodegrades because the molecules of the first resin enter between the molecules of the second resin.

It was also found that when the first resin and the second resin are mixed at the molecular level, heat resistance, strength, fluidity, transferability, and optical properties are improved as compared to the first resin alone. This was totally unexpected. This is something that a person skilled in the art of plastics, bioplastics, and biodegradable plastics cannot easily guess, and has been demonstrated in the experiments of the examples of this invention. This is because the molecules of the first resin and the molecules of the second resin are intricately entwined, so that the material is stable even at high temperatures, has improved strength, and is optically uniform. It is thought that the index and birefringence were improved. Furthermore, it is thought that the first resin also functions as a solvent for the second resin when melted, so that the viscosity is lowered, the fluidity is improved, and the transferability is improved.

<<Molded product by optical molding>>
<First embodiment>
In the first embodiment, resin pellets were prepared from a resin composition containing 100% by weight of a hemicellulose derivative. The hemicellulose derivative has the above structural formula, in which R1 and R2 are acetyl groups. The molecular weight (weight average molecular weight Mw) of the hemicellulose derivative is 100,000. Using the resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were produced by photomolding. As a comparative example, PLA (polylactic acid) (the molecular weight of PLA ((weight average molecular weight Mw) is 100,000)) 100% by weight dumbbell test piece, strip test piece, disk substrate, cup and flat plate sample products. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated.The evaluation results are shown in Table 1.

A sample product containing 100% by weight of a hemicellulose derivative exceeded target values in heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability. Moreover, the sample product containing 100% by weight of the hemicellulose derivative is superior to the sample product containing 100% by weight of PLA (polylactic acid) in all evaluation items. In relation to the seventh and eighth embodiments, resin pellets of a resin composition containing 100% by weight of a hemicellulose derivative were prepared. A hemicellulose derivative in which R1 and R2 are acetyl groups is referred to as Example 10.

<Second embodiment>
Next, the proportions of the hemicellulose derivative and PMMA were changed, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. The hemicellulose derivative has the above structural formula, in which R1 and R2 are acetyl groups. The molecular weight (weight average molecular weight Mw) of PMMA is 120,000.

In Example 1, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PMMA.
In Example 2, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PMMA.
In Example 3, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PMMA.
In Example 4, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PMMA.
In Example 5, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PMMA.
In Example 6, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PMMA.
In Example 7, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PMMA.
In Example 8, resin pellets were prepared from a resin composition containing 80% by weight of the hemicellulose derivative and 20% by weight of PMMA.
In Example 9, resin pellets were prepared from a resin composition containing 90% by weight of the hemicellulose derivative and 10% by weight of PMMA.

Using these 9 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 2 shows the evaluation results. Although Table 2 does not list the measurement method, it is the same as the measurement method in Table 1. The same applies to Tables 3 to 7 below.

When the second resin is PMMA, the heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability are improved regardless of the PMMA ratio. Exceeded the target value. Especially when the PMMA content is 40% to 70% by weight (60% to 30% by weight of the hemicellulose derivative), the heat resistance temperature, tensile strength, bending strength and biodegradability are excellent. Even when compared with 100% by weight hemicellulose derivative, the results are good in many evaluation items.

<Third Embodiment>
Next, the proportions of the hemicellulose derivative and PC were changed, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. The hemicellulose derivative has the above structural formula, in which R1 and R2 are acetyl groups. The molecular weight of PC (weight average molecular weight Mw) is 140,000.

In Example 11, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PC.
In Example 12, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PC.
In Example 13, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PC.
In Example 14, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PC.
In Example 15, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PC.
In Example 16, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PC.
In Example 17, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PC.
In Example 18, resin pellets were prepared from a resin composition containing 80% by weight of hemicellulose derivative and 20% by weight of PC.
In Example 19, resin pellets were prepared from a resin composition containing 90% by weight of hemicellulose derivative and 10% by weight of PC. In addition, Example 20 is a missing number.

Using these 9 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 3 shows the evaluation results.

When the second resin is PC, the heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability are improved regardless of the proportion of PC. Exceeded the target value. Especially when the content of PC is from 40% to 70% by weight (60% to 30% by weight of hemicellulose derivative), the heat resistant temperature, tensile strength, bending strength and biodegradability are excellent. Even when compared with 100% by weight hemicellulose derivative, the results are good in many evaluation items.

<Fourth Embodiment>
Next, the proportions of the hemicellulose derivative and PE were varied, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. The hemicellulose derivative has the above structural formula, in which R1 and R2 are acetyl groups. The molecular weight of PE (weight average molecular weight Mw) is 160,000.

In Example 21, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PE.
In Example 22, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PE.
In Example 23, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PE.
In Example 24, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PE.
In Example 25, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PE.
In Example 26, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PE.
In Example 27, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PE.
In Example 28, resin pellets were prepared from a resin composition containing 80% by weight of hemicellulose derivative and 20% by weight of PE.
In Example 29, resin pellets were prepared from a resin composition containing 90% by weight of hemicellulose derivative and 10% by weight of PE. Note that Example 30 is a missing number.

Using these 9 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 4 shows the evaluation results.

When the second resin is PE, the total light transmittance and birefringence phase difference are poor, so it cannot be applied to optical parts or moldings that require transparency. However, when the PE content is 70% by weight or less, the heat resistance temperature, tensile strength, bending strength, fluidity, transferability, impurity concentration, and biodegradability exceed the target values. Especially when the PE content is 40 to 70% by weight (60 to 30% by weight of the hemicellulose derivative), the heat resistant temperature, tensile strength, bending strength and biodegradability are excellent. Fluidity is good as compared with 100% by weight of hemicellulose derivative.

<Fifth Embodiment>
Next, the proportions of the hemicellulose derivative and PP were changed, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. The hemicellulose derivative has the above structural formula, in which R1 and R2 are acetyl groups. The molecular weight of PP (weight average molecular weight Mw) is 200,000.

In Example 31, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PP.
In Example 32, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PP.
In Example 33, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PP.
In Example 34, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PP.
In Example 35, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PP.
In Example 36, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PP.
In Example 37, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PP.
In Example 38, resin pellets were prepared from a resin composition containing 80% by weight of hemicellulose derivative and 20% by weight of PP.
In Example 39, resin pellets were prepared from a resin composition containing 90% by weight of hemicellulose derivative and 10% by weight of PP. Note that Example 40 is a missing number.

Using these 9 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 5 shows the evaluation results.

When the second resin is PP, the total light transmittance and birefringence phase difference are poor, so it cannot be applied to optical parts or moldings that require transparency. However, when the PP content is 70% by weight or less, the heat resistance temperature, tensile strength, bending strength, fluidity, transferability, impurity concentration, and biodegradability exceed the target values. Especially when the PP content is 40 to 70% by weight, the heat resistant temperature, tensile strength, bending strength and biodegradability are excellent. Even when compared with 100% by weight hemicellulose derivative, the results are good in many evaluation items.

<Sixth embodiment>
Next, the proportions of the hemicellulose derivative and PET were varied, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. The hemicellulose derivative has the above structural formula, in which R1 and R2 are acetyl groups. The molecular weight (weight average molecular weight Mw) of PET is 300,000.

In Example 41, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PET.
In Example 42, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PET.
In Example 43, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PET.
In Example 44, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PET.
In Example 45, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PET.
In Example 46, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PET.
In Example 47, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PET.
In Example 48, resin pellets were prepared from a resin composition containing 80% by weight of hemicellulose derivative and 20% by weight of PET.
In Example 49, resin pellets were prepared from a resin composition containing 90% by weight of hemicellulose derivative and 10% by weight of PET. Note that Example 50 is a missing number.

Using these 9 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 6 shows the evaluation results.

When the second resin is PET, if the PET content is 80% by weight or more, the birefringence retardation is poor, and thus cannot be applied to optical parts. However, when the PET content is 70% by weight or less, the heat resistance temperature, tensile strength, bending strength, fluidity, transferability, impurity concentration, and biodegradability exceed the target values. Especially when the PET content is 40% by weight to 70% by weight, the heat resistance temperature, tensile strength, bending strength and biodegradability are excellent. Even when compared with 100% by weight hemicellulose derivative, the results are good in many evaluation items.

<Seventh embodiment>
Next, the proportions of the hemicellulose derivative and PMMA were changed, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. A hemicellulose derivative has R1 and R2 as acetonyl groups. Acetonyl groups are shown below. The molecular weight (weight average molecular weight Mw) of the hemicellulose derivative is 100,000. The molecular weight (weight average molecular weight Mw) of PMMA is 120,000.

In Example 51, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PMMA.
In Example 52, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PMMA.
In Example 53, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PMMA.
In Example 54, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PMMA.
In Example 55, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PMMA.
In Example 56, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PMMA.
In Example 57, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PMMA.
In Example 58, resin pellets were prepared from a resin composition containing 80% by weight of hemicellulose derivative and 20% by weight of PMMA.
In Example 59, resin pellets were prepared from a resin composition containing 90% by weight of hemicellulose derivative and 10% by weight of PMMA.
In Example 60, resin pellets were prepared from a resin composition containing 100% by weight of a hemicellulose derivative in which R1 and R2 are acetonyl groups.

Using these 10 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 7 shows the evaluation results.

When comparing 100% by weight of the hemicellulose derivative in which R1 and R2 are acetyl groups and 100% by weight of the hemicellulose derivative in which R1 and R2 are acetonyl groups, there is not a large difference, but there is a slight difference, but 100% by weight of the hemicellulose derivative in which R1 and R2 are acetonyl groups. A good result is obtained from the sample product of Therefore, when comparing Tables 1 and 7, even with the same ratio of PMMA, the evaluation items in Table 7 show the same or slightly better results. In addition, the tendency of excellent heat resistance temperature, tensile strength, flexural strength and biodegradability is also the same as in Table 1, especially when PMMA is 40% by weight to 70% by weight.

<Eighth embodiment>
First, the proportions of the hemicellulose derivative and PMMA were changed, and they were melt-kneaded by an extrusion kneader to prepare 3 kg of resin pellets of these resin compositions. R1 and R2 of hemicellulose derivatives are carboxyl groups (--COOH). The molecular weight (weight average molecular weight Mw) of the hemicellulose derivative is 100,000. The molecular weight (weight average molecular weight Mw) of PMMA is 120,000.

In Example 61, resin pellets were prepared from a resin composition containing 10% by weight of hemicellulose derivative and 90% by weight of PMMA.
In Example 62, resin pellets were prepared from a resin composition containing 20% by weight of hemicellulose derivative and 80% by weight of PMMA.
In Example 63, resin pellets were prepared from a resin composition containing 30% by weight of hemicellulose derivative and 70% by weight of PMMA.
In Example 64, resin pellets were prepared from a resin composition containing 40% by weight of hemicellulose derivative and 60% by weight of PMMA.
In Example 65, resin pellets were prepared from a resin composition containing 50% by weight of hemicellulose derivative and 50% by weight of PMMA.
In Example 66, resin pellets were prepared from a resin composition containing 60% by weight of hemicellulose derivative and 40% by weight of PMMA.
In Example 67, resin pellets were prepared from a resin composition containing 70% by weight of hemicellulose derivative and 30% by weight of PMMA.
In Example 68, resin pellets were prepared from a resin composition containing 80% by weight of hemicellulose derivative and 20% by weight of PMMA.
In Example 69, resin pellets were prepared from a resin composition containing 90% by weight of hemicellulose derivative and 10% by weight of PMMA.
In Example 70, resin pellets were prepared from a resin composition containing 100% by weight of a hemicellulose derivative in which R1 and R2 are carboxyl groups.

Using these 10 types of resin pellets, dumbbell test pieces, strip test pieces, disk substrates, cups and flat plate samples were prepared by photoforming. Using these sample products, heat resistance temperature, tensile strength, bending strength, fluidity, transferability, total light transmittance, birefringence phase difference, impurity concentration, and biodegradability were evaluated. Table 8 shows the evaluation results.

When comparing 100% by weight of the hemicellulose derivative in which R1 and R2 are acetyl groups and 100% by weight of the hemicellulose derivative in which R1 and R2 are carboxyl groups, there is not a large difference, but there is a slight difference, but 100% by weight of the hemicellulose derivative in which R1 and R2 are carboxyl groups. A good result is obtained from the sample product of Therefore, when comparing Tables 1 and 8, even with the same proportion of PMMA, the evaluation items in Table 8 show the same or slightly better results. In addition, the same tendency as shown in Table 1 shows that the heat resistance temperature, tensile strength, bending strength and biodegradability are excellent especially when PMMA is 40% by weight to 70% by weight.

In summary, compared with the conventional PLA of 100% weight, 100% by weight of the hemicellulose derivative with an acetyl group, 100% by weight of the hemicellulose derivative with an acetonyl group, and 100% by weight of the hemicellulose derivative with a carboxyl group are in all evaluation items. Good results have been obtained. Furthermore, in the resin composition composed of the first resin and the second resin, which are hemicellulose derivatives, good results are obtained when the first resin is 30 to 60% by weight and the second resin is 40 to 70% by weight. It is understood that it is obtained. Furthermore, it is understood that even better results are obtained when the first resin is 40 to 50% by weight and the second resin is 50 to 60% by weight.

<<Injection molding by injection molding (without gas)>>
<Ninth Embodiment>
An injection-molded product was produced using the resin pellets of the resin composition composed of the first resin and the second resin described in the first to eighth embodiments (Examples 1 to 70).

FIG. 1 is a conceptual diagram of molding an injection-molded product using an injection molding machine 10 and a mold 50. As shown in FIG. FIG. 1(a) is a diagram showing a state in which resin pellets RP of a resin composition are heated and liquefied in a resin injection section. (b) is a diagram showing a state in which a liquefied resin composition is injected from a resin injection section into a mold section. (c) is a diagram showing a state in which the mold part is opened and the resin molding is taken out.

(Configuration of injection molding machine)
The injection molding machine 10 includes a hopper 11 for receiving resin pellets RP of a resin composition, a cylinder 12 for receiving the resin pellets RP from the hopper 11, a rotatable screw 13 disposed inside the cylinder 12, and a and a heater 14 disposed thereon. Further, the screw 13 can be moved in the mold direction and in the opposite direction by the drive unit 15 . A liquefied resin composition is injected from a nozzle 16 at the tip of the cylinder 12 .

The mold 50 is composed of a stationary mold 52 and a movable mold 54, and a hollow cavity 56 is formed with the stationary mold 52 and the movable mold 54 in close contact with each other. A spool bushing 55 is formed in the cavity 56 as a hole into which the liquefied resin composition enters.

(Molding method for injection molding machine)
The resin pellets RP fall from the hopper 11 while being weighed by the rotation of the screw 13 . The resin pellets RP are melted (liquefied) by the frictional heat generated by the rotation and kneading of the screw 13 and the heat of the heater 14 . The weighed and liquefied resin composition moves the screw 13 in the direction of the mold by the drive unit 15, so that the resin composition passes through the spool bush 55 of the mold 50 from the nozzle 16 at the tip of the cylinder 12. It is injected into cavity 56 . The resin composition injected into the cavity 56 is cooled and solidified within the mold 50 . After that, the movable mold 54 is moved, the nozzle 16 of the injection molding machine 10 is also separated from the spool bushing 55, and the molded product MD is taken out. The molded product MD is taken out from the mold 50 by automatic dropping or taken out by a picker (not shown).

As for the moldings MD, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared in the same manner as in the first to eighth embodiments. The evaluation results are shown in Table 9A (Ninth Embodiment 1) to Table 9G (Ninth Embodiment 7). Since it is a molded product, items such as molding cycle time, molded product defect density, and molded product weight were newly added as evaluation targets. On the other hand, items such as fluidity, birefringence phase difference, and impurity concentration were not evaluated. Regarding the resin composition, the examples of the first and second embodiments correspond to the examples of the ninth embodiment part 1, and the examples of the third embodiment correspond to the examples of the ninth embodiment part 2. Then, the examples of the eighth embodiment correspond to the seventh embodiment of the ninth embodiment.

As can be understood by comparing Example 10 of the first embodiment and the ninth embodiment, a sample product of 100% by weight of a hemicellulose derivative with an acetyl group by photoforming and a sample product of 100% by weight of a hemicellulose derivative with an acetyl group by injection molding. The heat resistance strength, tensile strength, etc. are the same as the sample product of .

As shown in the ninth embodiment part 1, the resin composition consisting of the first resin and the second resin has a molding cycle time, a molding defect density, and good results in the evaluation items of molded product weight. Also, it is understood that good results are obtained when the first resin is 30 to 60% by weight and the second resin is 40 to 70% by weight. Furthermore, it is understood that even better results are obtained when the first resin is 40 to 50% by weight and the second resin is 50 to 60% by weight. The resin composition composed of the first resin and the second resin is highly biodegradable to solve environmental problems and marine pollution problems, and allows easy production of injection molded articles.

<<Injection molding by injection molding (with gas)>>
<Tenth Embodiment>
An injection-molded product was produced using the resin pellets of the resin composition composed of the first resin and the second resin described in the first to eighth embodiments (Examples 1 to 70). Unlike the ninth embodiment, inert gas is supplied to at least one of the injection molding machine 10 and the mold 50 in the tenth embodiment.

FIG. 2 is a conceptual diagram of molding an injection-molded product using the injection molding machine 10 and the mold 50. As shown in FIG. FIG. 2(a) is a view showing a state in which the resin pellets RP of the resin composition are heated and liquefied in the resin injection section. (b) is a diagram showing a state in which a liquefied resin composition is injected from a resin injection section into a mold section. (c) is a diagram showing a state in which the mold part is opened and the resin molding is taken out.

(Configuration of injection molding machine)
The same reference numerals are given to the same members as the injection molding machine 10 and the mold 50 depicted in FIG. Differences from FIG. 1 will be described, and descriptions of the same reference numerals will be omitted. The cylinder 12 is provided with a gas supply pipe 18 to which a pump PP is connected. A gas supply pipe 58 to which a pump PP is connected is also provided. The pump PP supplies an inert gas or the like to the liquefied resin composition. This causes the molding to have foam. It should be noted that at least one of the injection molding machine 10 and the mold 50 may be provided to supply the inert gas or the like to the liquefied resin composition.

Gases for foaming include nitrogen, inert gases typified by rare gases such as helium and argon, carbon dioxide which is easily soluble in thermoplastic resins and exhibits a good plasticizer effect, saturated hydrocarbons having 1 to 5 carbon atoms, and They include chlorofluorocarbons in which some of the hydrogen atoms are substituted with fluorine, water, vapors of liquids such as alcohol, and the like. In this embodiment, carbon dioxide is used as the foaming gas.

(Molding method for injection molding machine)
The following molding method is a method of supplying gas to the resin composition liquefied in both the injection molding machine 10 and the mold 50 .
The resin pellets RP fall from the hopper 11 while being weighed by the rotation of the screw 13 . The resin pellets RP are melted (liquefied) by the frictional heat generated by the rotation and kneading of the screw 13 and the heat of the heater 14 . A gas is introduced from the pump PP into the molten resin composition and diffused into the liquid. Then, the measured and liquefied resin composition moves the screw 13 in the direction of the mold by the driving unit 15, and the resin composition in which the gas diffuses from the nozzle 16 at the tip of the cylinder 12 is transferred to the spool bush of the mold 50. It is injected through 55 into cavity 56 .

The resin composition injected into the cavity 56 is first introduced with gas from the pump PP and diffused into the liquid. After that, the gas-containing resin composition is cooled and solidified in the mold 50 . After that, the movable mold 54 is moved, the nozzle 16 of the injection molding machine 10 is also separated from the spool bushing 55, and the molded product MD is taken out. The molded product MD is taken out from the mold 50 by automatic dropping or taken out by a picker (not shown).

As for the moldings MD, dumbbell test pieces, strip test pieces, disk substrates, cups, and flat plate samples were prepared in the same manner as in the first to eighth embodiments. The evaluation results are shown in Table 10A (Tenth Embodiment 1) to Table 10G (Tenth Embodiment 7).

As can be understood by comparing Example 10 of the ninth embodiment and Example 10 of the tenth embodiment, a sample product of 100% by weight of an acetyl group hemicellulose derivative by injection molding and an acetyl group hemicellulose derivative by foam injection molding were obtained. A sample product of 100% by weight of a derivative is a sample product of 100% by weight of an acetyl group hemicellulose derivative obtained by foam injection molding. ing. Also, it is understood that good results are obtained when the first resin is 30 to 60% by weight and the second resin is 40 to 70% by weight. Furthermore, it is understood that even better results are obtained when the first resin is 40 to 50% by weight and the second resin is 50 to 60% by weight.

Furthermore, as can be understood by comparing the table of the ninth embodiment (parts 1 to 7) and the table of the tenth embodiment (parts 1 to 7), the second resin is PMMA, PC, PE, Both PP and PET have improved performance in molding cycle time, molding defect density, molding weight, heat resistance temperature, tensile strength, bending strength, transferability, total light transmittance, and biodegradability. From this result, the resin composition of the present embodiment is preferably molded by foaming injection molding using gas.

Although not mentioned as an example, there is a technique of supplying a foaming agent from a hopper together with resin pellets and performing foaming injection molding. The resin composition of the present embodiment can be expected to have improved performance even when the foaming agent is supplied from a hopper. Alternatively, resin pellets containing a foaming agent may be supplied. Furthermore, as a gas for foaming in the resin pellet, nitrogen, an inert gas represented by a rare gas such as helium or argon, carbon dioxide that easily dissolves in thermoplastic resin and exhibits a good plasticizer effect, carbon number 1 ~ It is also possible to supply a gas containing the saturated hydrocarbon of No. 5 and a gas obtained by partially substituting fluorine for hydrogen.

DESCRIPTION OF SYMBOLS 10... Injection molding machine 11... Hopper 12... Cylinder 13... Screw 14... Heater 15... Driving part 16... Nozzle 18... Gas supply pipe 50... Mold 52... Fixed side mold 54... Movement Side mold 55 Spool bush 56 Cavity 58 Gas supply pipe PP Gas pump

Claims (11)

A plant-derived first resin having the following structural formula,

Beverage container, cup container or flat plate optical molding or injection molding made of a resin composition containing.
(In the formula, R1 and R2 represent an alkyl group, an acetyl group, an acetonyl group (chemical formula shown below) , a carbonyl group, or a substituent containing them in the structure. R1 and R2 are the same or different.
n represents an integer of 2 or more. )

further comprising a second resin that is polymethyl methacrylate (PMMA, acrylic) ;
A photomolded product or an injection molded product of the beverage container , cup container or flat plate according to claim 1 . Polycarbonate (PC), cyclic olefin polymer (COP), cyclic olefin copolymer (COC), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), ABS resin (ABS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinyl acetate (PVAC), polymethylpentene (PMP), polybutene (PB), hydroxybenzoic acid polyester (HBP), polyetherimide (PEI), polyacetal (POM), Polyphenylene ether (PPE), polyphenylene oxide (PPO), polyphenylene sulfide (PPS), polyurethane (PUR), ionomer resin (IO), fluorine resin (FR), polytetrafluoroethylene (PTFE), polycyclohexylene dimethylene terephthalate (PCT), polyethylene naphthalate (PEN), polyarylate (PAR), polyacrylonitrile (PAN), polyarylsulfone (PASF), polyamide (PA), polyvinyl alcohol (PVA), polymethacrylstyrene (MS), butadiene Resin (BDR), polybutylene terephthalate (PBT), polyester carbonate (PPC), polybutylene succinate (PBS), norbornene resin (NB), polyamide (nylon) (PA), Teflon (registered trademark), fiber reinforced plastic ( FRP), polyhydroxyalkanoic acid (PHA), polyhydroxybutyric acid (PHB), hydroxybutyric acid/hydroxyhexanoic acid copolymer (PHBH), acetylcellulose (CA), polyimide (PI), polyamideimide (PAI), polysulfone ( PSF), polyethersulfone (PES), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polychlorotrifluoroethylene (PCTFE), silicone resin (SI), epoxy resin (EP), wood powder, wood pellets , bamboo powder, bamboo pellets, grass powder, grass pellets, paper powder, paper pellets and a second resin containing any one of polylactic acid (PLA),
A photomolded product or an injection molded product of the beverage container , cup container or flat plate according to claim 1 . Photomolded product or injection molding of a beverage container , cup container or flat plate for molding according to claim 2 or 3, wherein the first resin is 30 to 60% by weight and the second resin is 40 to 70% by weight. thing. 40 to 50 % by weight of the first resin and 50 to 60% by weight of the second resin . thing. A plant-derived resin having the following structural formula,

Beverage containers, cups or flat plates made of a resin composition having a tensile strength value of 80 MPa or more as measured using a dumbbell test piece prepared by photomolding or injection molding.
(In the formula, R1 and R2 represent an alkyl group, an acetyl group, an acetonyl group (chemical formula shown below) , a carbonyl group, or a substituent containing them in the structure. R1 and R2 are the same or different.
n represents an integer of 2 or more. )

A plant-derived first resin having the following structural formula,

A step of introducing a resin composition containing into an extrusion kneading device;
A step of extruding as a cylindrical resin from the nozzle of the extrusion kneading device;
A step of cutting the extruded cylindrical resin with a pelletizer,
A manufacturing method for producing photo- or injection-moldable resin pellets with a diameter of 0.2-3 mm and a length of 0.2-5 mm.
(In the formula, R1 and R2 represent an alkyl group, an acetyl group, an acetonyl group (chemical formula shown below) , a carbonyl group, or a substituent containing them in the structure. R1 and R2 are the same or different.
n represents an integer of 2 or more. )

further comprising a second resin that is polymethyl methacrylate (PMMA, acrylic) ;
A manufacturing method for manufacturing the resin pellet according to claim 7 . Polycarbonate (PC), cyclic olefin polymer (COP), cyclic olefin copolymer (COC), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), ABS resin (ABS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinyl acetate (PVAC), polymethylpentene (PMP), polybutene (PB), hydroxybenzoic acid polyester (HBP), polyetherimide (PEI), polyacetal (POM), Polyphenylene ether (PPE), polyphenylene oxide (PPO), polyphenylene sulfide (PPS), polyurethane (PUR), ionomer resin (IO), fluorine resin (FR), polytetrafluoroethylene (PTFE), polycyclohexylene dimethylene terephthalate (PCT), polyethylene naphthalate (PEN), polyarylate (PAR), polyacrylonitrile (PAN), polyarylsulfone (PASF), polyamide (PA), polyvinyl alcohol (PVA), polymethacrylstyrene (MS), butadiene Resin (BDR), polybutylene terephthalate (PBT), polyester carbonate (PPC), polybutylene succinate (PBS), norbornene resin (NB), polyamide (nylon) (PA), Teflon (registered trademark), fiber reinforced plastic ( FRP), polyhydroxyalkanoic acid (PHA), polyhydroxybutyric acid (PHB), hydroxybutyric acid/hydroxyhexanoic acid copolymer (PHBH), acetylcellulose (CA), polyimide (PI), polyamideimide (PAI), polysulfone ( PSF), polyethersulfone (PES), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polychlorotrifluoroethylene (PCTFE), silicone resin (SI), epoxy resin (EP), wood powder, wood pellets , bamboo powder, bamboo pellets, grass powder, grass pellets, paper powder, paper pellets and a second resin containing any one of polylactic acid (PLA),
A manufacturing method for manufacturing the resin pellet according to claim 7 . 10. The method for producing resin pellets according to claim 8, wherein the first resin is 30 to 60% by weight and the second resin is 40 to 70% by weight. 10. The method for producing resin pellets according to claim 8, wherein the first resin is 40 to 50% by weight and the second resin is 50 to 60% by weight.

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