WO2005012398A1 - 射出成形体とその製造方法、並びに、射出成形体に用いられるペレット - Google Patents
射出成形体とその製造方法、並びに、射出成形体に用いられるペレット Download PDFInfo
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- WO2005012398A1 WO2005012398A1 PCT/JP2004/010917 JP2004010917W WO2005012398A1 WO 2005012398 A1 WO2005012398 A1 WO 2005012398A1 JP 2004010917 W JP2004010917 W JP 2004010917W WO 2005012398 A1 WO2005012398 A1 WO 2005012398A1
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- lactic acid
- based resin
- injection
- mass
- pellet
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
-
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/045—Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/005—Lignin
Definitions
- the present invention relates to an injection molded article, a method for producing the same, and a pellet used for the injection molded article.
- the present invention relates to an injection-molded article containing a plant-derived material as a main component, having a high crystallization rate, and having heat resistance.
- Plastics have now become widespread in all fields such as daily life and industry, and the annual production of plastics worldwide has reached about 100 million tons. Most of the plastics produced have been discarded after use, and this has been recognized as one of the causes of disruption to the global environment. Therefore, there is a need for materials that will not adversely affect the global environment even if they are disposed of.
- lactic acid-based resins can be mass-produced by chemical engineering using lactic acid obtained by fermentation of starch, and are excellent in transparency, rigidity, heat resistance and the like. Therefore, lactic acid-based resins are attracting attention as an alternative to polystyrene and polyethylene terephthalate in the field of injection molding such as film packaging materials, home appliances, OA equipment, and automobile parts.
- Injection molded articles used for home appliances, ⁇ A equipment, automobile parts, etc. are required to have heat resistance to prevent fire.
- lactic acid-based resin is a material with poor heat resistance compared to ABS resin and filler-filled polypropylene resin, which have a low glass transition temperature. For this reason, it has been difficult to use it for applications such as home appliances, OA equipment, and automobile parts.
- Japanese Patent Application Laid-Open No. 9-169897 discloses a biodegradable fiber-reinforced molded product in which natural fibers and the like are bonded to an aliphatic polyester resin in a dispersed state.
- Japanese Patent Application Laid-Open No. 2002-146219 discloses that a natural fiber and a particulate biodegradable resin are mixed to produce a biodegradable composite material by hot press molding.
- Patent Document 1 Japanese Patent Application Laid-Open No. 9-116998 / 1997
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-146219
- the present invention has been made to solve the above problems, and an object of the present invention is to provide an injection-molded article containing a plant-derived raw material as a main component, having excellent heat resistance, and having a high crystallization rate. It is to provide
- the injection molded article of the present invention is a resin composition
- the crystallization calorific value peak temperature (Tc) of the resin composition is preferably 100 ° C or more.
- the deflection temperature under load of the injection molded body can be 133 ° C or more.
- the injection-molded article of the present invention is formed after kneading the (B) coating obtained by impregnating (immersing) (A) a natural fiber with a lactic acid-based resin and (A) a lactic acid-based resin. be able to.
- it may be formed after kneading (A) a lactic acid-based resin and (A) a lactic acid-based resin by impregnating (dipping) the (B) natural fiber into (A) a lactic acid-based resin by punching and molding.
- the pellet of the present invention comprises: (A) a lactic acid-based resin and (B) cellulose 40% by mass to 60% by mass. A natural fiber containing 10% by mass and 30% by mass of lignin, and (A) a lactic acid-based resin and (B) a natural fiber in a mass ratio of 99: 1-70: 30.
- the constituent components of the pellet can be uniformly dispersed in appearance.
- the pellet of the present invention is formed by kneading the (B) coating obtained by impregnating (immersing) the (A) lactic acid-based resin with the (A) lactic acid-based resin and (A) the lactic acid-based resin by pultrusion molding. be able to.
- the method for producing a pellet of the present invention further comprises (A) a step of impregnating (immersing) the natural fiber with (A) a lactic acid-based resin, and (A) a step of impregnating (immersing) the natural fiber. ) A step of adding and kneading lactic acid-based resin.
- Another method for producing a pellet of the present invention includes a step of forming (A) a lactate-based resin by impregnating (immersing) a natural fiber with a lactate resin by pultrusion, and then forming a coated pellet; And (A) a step of adding a lactic acid-based resin to the material and kneading the mixture.
- the method for producing an injection-molded article of the present invention comprises the steps of: (B) impregnating (dipping) a natural fiber into (A) a lactic acid-based resin by pultrusion; and then forming coated pellets; It further comprises (A) a step of adding a lactic acid-based resin to a product pellet and kneading the mixture to form a pellet, and a step of forming an injection molded article using the pellet.
- (B) used in the present invention cellulose 40 weight 0/0 - 60 wt 0/0 and lignin 10 mass 0/0 - 3
- the natural fiber and a 0 mass% for example, cellulose 40% 60 Natural fibers such as kenaf, bamboo, bagasse and the like containing 10% by mass and 10% by mass of lignin and 30% by mass.
- cellulose When cellulose is less than 40% by mass or lignin is less than 10% by mass, the effect of improving heat resistance by fiber reinforcement can be expected, but crystallization cannot be promoted, and sufficient heat resistance for practical use can be obtained. I ca n’t do that.
- the cellulose content When the cellulose content is more than 60% by mass, the fiber undergoes thermal deterioration in the extruder, causing discoloration and a decrease in strength.
- the lignin content exceeds 30% by mass, blowing of low-molecular-weight materials is performed. Appearance failure occurs.
- the (A) lactic acid-based resin used in the present invention includes poly (L-lactic acid) having a structural unit of L-lactic acid, poly (D-lactic acid) having a structural unit of D-lactic acid, L-lactic acid having a structural unit of L-lactic acid and Polylactic acid (DL-lactic acid), which is D-lactic acid, and a mixture thereof.
- a polymerization method of the lactic acid-based resin a known method such as a condensation polymerization method or a ring-opening polymerization method can be employed.
- a condensation polymerization method L-lactic acid, D-lactic acid, or a mixture thereof can be directly subjected to dehydration condensation polymerization to obtain a lactic acid-based resin having an arbitrary composition.
- a lactic acid-based resin can be obtained from ratatide, which is a cyclic dimer of lactic acid, by selecting an appropriate catalyst and, if necessary, using a polymerization regulator.
- Lactide includes L-lactide, a dimer of L-lactic acid, D-latatide, a dimer of D-lactic acid, and L_
- DL-lactide composed of lactic acid and D-lactic acid
- a lactic acid-based resin having any composition and crystallinity can be obtained by mixing and polymerizing these as necessary.
- a small amount of a copolymer component can be added as necessary, for example, to improve heat resistance, and a non-aliphatic dicarboxylic acid such as terephthalic acid and / or bis Non-aliphatic diols such as phenol A ethylene oxide adducts can be used.
- a non-aliphatic dicarboxylic acid such as terephthalic acid and / or bis
- Non-aliphatic diols such as phenol A ethylene oxide adducts
- a chain extender for example, a diisocyanate compound, an epoxy compound, an acid anhydride or the like can be used for the purpose of increasing the molecular weight.
- the lactic acid-based resin may further be aliphatic diol and / or aliphatic dicarboxylic acid, even if it is a copolymer with lactic acid and / or other hydroxycarboxylic acid units other than lactic acid, such as a hydroxycarboxylic acid. It may be a copolymer with an acid.
- hydroxycarboxylic acid units include optical isomers of lactic acid (D lactic acid for L_lactic acid, L lactic acid for D lactic acid), glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 2-hydroxy- Ratantones such as n-butyric acid, 2-hydroxy-3,3-dimethylbutyric acid, 2-hydroxy-3_methylbutyric acid, 2-hydroxycaproic acid, etc. No.
- Examples of the aliphatic diol copolymerized with the lactic acid-based resin include ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, and the like.
- Examples of the aliphatic dicarboxylic acid include succinic acid, adipic acid, suberic acid, sebacic acid, and dodecanoic acid.
- Examples of the structure of the copolymer include a random copolymer, a block copolymer, and a graft copolymer, and any structure may be used. Copolymers are preferred.
- the polylactic acid segment is A
- the diol dicarboxylic acid segment is B
- a polymer having transparency and impact resistance can be obtained by using a typical ABA block copolymer.
- the glass transition temperature (Tg) of the segment B is preferably 0 ° C. or less from the viewpoint of exhibiting impact resistance.
- the lactic acid-based resin used in the present invention preferably has a weight average molecular weight in the range of 50,000 to 400,000, more preferably 100,000 to 250,000.
- the weight average molecular weight of the lactic acid resin is If it is smaller than 50,000, practical physical properties such as mechanical properties and heat resistance are hardly exhibited, and if it is larger than 400,000, the melt viscosity is too high and the moldability may be poor.
- an aliphatic polyester having a glass transition temperature (Tg) of 0 ° C or lower and z or an aromatic aliphatic polyester can be mixed with the lactic acid-based resin.
- the mixing amount thereof is preferably in the range of 550 parts by mass for 100 parts by mass of the lactic acid-based resin.
- the impact resistance can be imparted to the lactic acid-based resin by mixing the aliphatic polyester or the like having a Tg of 0 ° C. or less. If the aliphatic polyester to be mixed has a glass transition temperature exceeding 0 ° C., the effect of improving the impact resistance becomes poor.
- Examples of the aliphatic polyester having a Tg of 0 ° C. or lower used in the present invention include aliphatic polyesters excluding lactic acid-based resins, for example, aliphatic polyesters obtained by condensing an aliphatic diol and an aliphatic dicarboxylic acid. Aliphatic polyesters and aliphatic polyesters obtained by ring-opening polymerization of cyclic ratatatones.
- the "aliphatic polyester obtained by condensing an aliphatic diol and an aliphatic dicarboxylic acid” includes the following aliphatic diols and aliphatic dicarboxylic acids, respectively. Those obtained by selecting and condensing more than one kind are mentioned. If necessary, the desired polymer (polymer) can be obtained by jumping up with an isocyanate conjugate or an epoxy conjugate.
- the strong aliphatic polyester is preferably biodegradable. Examples of the aliphatic diol used here include ethylene glycol, propylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, and the like. Succinic acid, adipic acid, suberic acid, sebacic acid, dodecanedioic acid, etc. can be listed as typical examples.
- the “aliphatic polyester obtained by ring-opening polymerization of cyclic ratatatons” includes, among the cyclic monomers such as ⁇ -force prolatataton, ⁇ -valerolatatone, and / 3-methyl_ ⁇ -valerolatatatone, 1 Those obtained by polymerizing more than one kind are exemplified.
- the aromatic aliphatic polyester used in the present invention includes an aromatic ring between aliphatic chains.
- it is obtained by condensing an aromatic dicarboxylic acid component, an aliphatic dicarboxylic acid component, and an aliphatic diol component.
- Examples of the aromatic dicarboxylic acid component include terephthalic acid, isophthalic acid, and naphthalene dicarboxylic acid.
- Examples of the aliphatic dicarboxylic acid component include succinic acid, adipic acid, suberic acid, sebacic acid, and dodecane. And diacids.
- Examples of the aliphatic diol component include ethylene glycol, 1,4-butanediol, and 1,4-cyclohexanedimethanol.
- the aromatic dicarboxylic acid component, the aliphatic dicarboxylic acid component, and the aliphatic diol component may each use two or more types.
- the aromatic dicarboxylic acid component most preferably used is terephthalic acid
- the aliphatic dicarboxylic acid component is adipic acid
- the aliphatic diol component is 1,4-butanediole.
- aliphatic polyester other than the lactic acid-based resin a copolymer of succinic acid, 1,4-butanediol and adipic acid is used.
- aromatic aliphatic polyester a copolymer of tetramethylene adipate and terephthalate is used. Examples include a copolymer of polybutylene adipate and terephthalate.
- Specific examples of aliphatic polyesters other than lactic acid-based resins and aromatic aliphatic polyesters include "Pionore" manufactured by Showa Polymer Co., Ltd., obtained by polymerizing succinic acid, 1,4-butanediol and adipic acid.
- the resin composition used to form the injection molded article of the present invention may contain a copolymer of a lactic acid-based resin with a diol and a dicarboxylic acid, or the like. It may contain an aliphatic polyester and / or an aromatic aliphatic polyester.
- the lactic acid-based resin is further mixed and kneaded with the covering in which the natural fiber is impregnated with the lactic acid-based resin by pultrusion, and then subjected to injection molding.
- the coating obtained by impregnating the natural fiber with the lactic acid-based resin is preferably pelletized to form a coating pellet.
- the pellets are visible to the naked eye as if the constituents were uniformly dispersed.
- the kneading can be performed, for example, by a co-axial twin screw extruder.
- the injection-molded product when stored for a long period of time, it may be hydrolyzed by water vapor in the air or moisture from the outside, which may cause deterioration of mechanical properties.
- a hydrolysis inhibitor (C) in order to improve the durability of the injection molded article, a hydrolysis inhibitor (C) can be further added.
- the compounding amount of the hydrolysis inhibitor (C) is 0.1-5.0 parts by mass with respect to 100 parts by mass of the total mass force of the lactic acid-based resin (A) and the natural fiber (B). Is preferred.
- the amount of the hydrolysis inhibitor is 0.1 parts by mass or more and 5.0 parts by mass or less, sufficient durability can be imparted, and the biodegradability is not impaired. The agent does not bleed out, and does not cause poor appearance or decrease in mechanical properties due to plasticization.
- hydrolysis inhibitor used in the present invention examples include epoxidized conjugates, isocyanate conjugates, acid anhydrides, oxazoline conjugates, and melamine compounds. Is preferred.
- a compound having a basic structure represented by the following general formula is particularly preferable.
- R represents an organic bonding unit, for example, aliphatic, alicyclic or aromatic.
- S can.
- n represents an integer of 1 or more, and is usually determined as appropriate between 1 and 50. In the case of n force 3 ⁇ 4 or more, two or more R may be the same or different.
- bis (dipropylphenyl) carbodiimide poly (4,4-diphenylmethanecarbodiimide), poly (p-phenylenecarbodiimide), poly (m_phenylenecarbodiimide) ), Poly (tolylcarbodiimide), poly (diisopropylphenylenecarbodiimide), poly (methyldiisopropylphenylenecarbodiimide), poly (triisopropylphenylenecarbodiimide), etc. It is mentioned as a carbodiimide compound. These carbodiimide compounds may be used alone or in combination of two or more.
- the carpoimide compound used in the present invention is preferably an aromatic carpoimide compound.
- an aliphatic carbodiimide compound has a sufficient effect of imparting hydrolysis resistance, an aromatic carbodiimide compound can impart hydrolysis resistance more effectively.
- carbodiimide compound examples include “STABAXOL” manufactured by Rhein Chemie, and “Calpositlite” manufactured by Nisshinbo Co., Ltd.
- additives such as a heat stabilizer, a nucleating agent, an antioxidant, a UV absorber, a light stabilizer, a lubricant, a pigment, a dye, a plasticizer and the like are added as long as the effects of the present invention are not impaired. Can be prescribed.
- the crystallization calorific value peak temperature (Tc) is defined as the temperature of a sample kept at 200 ° C for 2 minutes and then lowered to 40 ° C at 10 ° C / min by differential scanning calorimetry. Sometimes refers to the temperature at which the crystallization peak appears during the cooling process.
- the resin composition forming the injection-molded article has a heat of crystallization peak temperature (Tc) of preferably 100 ° C. or higher, and more preferably 110 ° C. or higher.
- crystallization calorific value peak temperature is 100 ° C or higher
- crystallization can be performed in a short time in the mold at the time of injection molding, in which the crystallization speed is high, and crystallization is performed after taking out from the mold after molding. This can be performed in a short time, and an injection molded article can be efficiently obtained.
- the deflection temperature under load is preferably 133 ° C or higher, more preferably 140 ° C or higher. If the deflection temperature under load is 133 ° C or higher, heat resistance is not desirable. It can be preferably used for daily necessities and food containers, and when it exceeds 140 ° C, it can be suitably used for electric and electronic parts, automobile parts and the like.
- the injection molded article of the present invention preferably has a flexural modulus at 80 ° C of 800 MPa or more, more preferably 860 MPa or more.
- the injection-molded article of the present invention first forms a coated pellet from a natural fiber impregnated with a lactic acid-based resin by pultrusion molding, and forms the coated pellet, the lactic acid-based resin, and The additives and the like are extruded into a strand shape using a twin-screw extruder to prepare pellets, and the pellets are again put into an injection molding machine and injection-molded.
- an injection molded article can be obtained by introducing a lactic acid-based resin and natural fibers into a twin-screw extruder or the like, directly kneading and injection molding.
- the former method that is, a method in which a coated pellet is formed by pultrusion molding, followed by kneading with a lactic acid-based resin and molding.
- a coated pellet is formed by pultrusion molding, followed by kneading with a lactic acid-based resin and molding.
- an injection molding method for example, an injection molding method such as an injection molding method, a gas assist molding method, and an injection compression molding method which are generally adopted when molding a thermoplastic resin can be employed.
- an in-mold molding method, a gas press molding method, a two-color molding method, a sandwich molding method, PUSH_PULL, SCORIM, and the like can be adopted according to other purposes.
- the injection molding method is not limited to these.
- the injection molding apparatus used is a general injection molding machine, gas assist molding machine, injection pressure. It is composed of a compression molding machine, etc., a molding die and auxiliary equipment used in these molding machines, a mold temperature control device, a raw material drying device, and the like.
- the molding conditions are preferably such that the temperature of the molten resin ranges from 170 ° C to 210 ° C in order to avoid thermal decomposition of the resin in the injection cylinder.
- the mold temperature is set as low as possible in order to shorten the cooling time of the molding cycle (mold closing / injection / holding pressure / cooling / mold opening / unloading). It is preferred.
- the mold temperature is preferably 15 ° C to 55 ° C. However, in order to suppress shrinkage, warpage, and deformation of the molded body during post-crystallization, it is advantageous to set the mold temperature to the higher temperature side even in this range.
- the molded body obtained by injection molding may be crystallized by heat treatment. By crystallizing the molded body in this way, the heat resistance of the molded body can be further improved.
- the crystallization treatment can be performed in the mold at the time of molding and after removal from the Z or the mold. From the viewpoint of productivity, when the crystallization rate of the resin composition forming the injection molded article is low, it is preferable to perform the crystallization treatment after removing the resin composition from the mold, while the crystallization rate is high. In such a case, the crystallization treatment may be performed in a mold. When crystallizing in a mold, the molten resin is filled in the heated mold, and then kept in the mold for a certain time.
- the mold temperature is preferably from 80 to 130 ° C, more preferably from 90 to 120 ° C, and the cooling time is preferably from 1 to 300 seconds, more preferably from 5 to 30 seconds. .
- the heat treatment temperature is preferably in the range of 60 to 130 ° C, more preferably in the range of 70 to 90 ° C. Les ,. If the heat treatment temperature is lower than 60 ° C, crystallization may not progress in the forming step, and if it is higher than 130 ° C, deformation or shrinkage may occur when cooling the formed body.
- the heating time is appropriately determined according to the composition of the resin constituting the injection molded body and the heat treatment temperature. For example, when the heat treatment temperature is 70 ° C, the heat treatment is performed for 15 minutes to 15 hours. When the heat treatment temperature is 130 ° C., the heat treatment is performed for 10 seconds to 30 minutes.
- injection molding is performed using a mold that has been heated to a predetermined temperature in advance. Then, crystallization in the mold as it is, method of increasing the temperature of the mold after injection molding and crystallization in the mold, or removing the injection molded body from the mold in an amorphous state, using hot air. Examples of the method include crystallization with steam, hot water, a far-infrared heater, an IH heater, and the like.
- the injection molded body need not be fixed, but is preferably fixed with a mold, a resin mold, or the like in order to prevent deformation of the molded body.
- the heat treatment can be performed in a packed state in consideration of productivity.
- the injection-molded article of the present invention has excellent heat resistance and crystallization speed, and is required to have heat resistance, such as electric / electronic device parts, automobile parts, daily necessities, food containers, and other materials. It is suitable as a general injection molded product.
- test piece Based on Japanese Industrial Standard JIS K-7191, a test piece with a length (L) of 120 mm, a width (W) of 11 mm and a thickness (t) of 3 mm was prepared, and this test piece was manufactured by Toyo Seiki Co., Ltd. Deflection temperature under load (HDT) was measured using "S-3M” manufactured by Seisakusho. However, the measurement was performed under the conditions of the flatwise direction and the bending stress applied to the test piece of 45. 1 N / cm 2 .
- HDT Deflection temperature under load
- test piece Based on Japanese Industrial Standard JIS K-7171, a test piece with a length (L) of 80 mm, a width (W) of 10 mm, and a thickness (t) of 4 mm was prepared, and this test piece was manufactured by Intesco Corporation.
- the flexural modulus at 80 ° C was measured using a precision universal material testing machine “MODEL2010”.
- Example 1 Approximately 10 mg of scaly pieces were also cut out from the injection molded body and used as test specimens. Using a differential scanning calorimeter “DSC-7” manufactured by Parkin Elma, Inc., the test piece was subjected to a temperature decrease measurement based on Japanese Industrial Standard JIS K-7121. The injection molded body test piece was heated and melted at 200 ° C. for 2 minutes, and then the temperature was lowered at 10 ° C. Zmin, and the measurement was performed. The temperature at which the crystallization peak appeared during this cooling process was defined as the crystallization calorific value peak temperature. (Example 1)
- the lactic acid-based resin was supplied to a 30 mm ⁇ single-screw extruder manufactured by Silico-Plae Co., Ltd. to which a crosshead die for drawing was connected.
- the obtained pellets were injection molded using an injection molding machine “IS50E” (screw diameter 25 mm) manufactured by Toshiba Machine Co., Ltd. to obtain a sheet material.
- L100mm XW100mm X t3mm plate material, L120mm XWl lmm X t3mm plate material, L100mm X W100mm X t4mm plate material, and L80mm X W10mm X t4mm plate material were prepared. That is, two types of plate members having different thicknesses were produced. However, the main molding conditions are as follows.
- the obtained injection molded body (plate material) is allowed to stand in a baking test device (DK S-5S) manufactured by Daiei Kagaku Seiki Seisaku-sho, and heat-treated at 70 ° C for 3.5 hours to promote crystallization. I let it.
- the deflection temperature under load, flexural modulus (flexural strength), and peak temperature of crystallization calorie were measured (evaluated) for the obtained injection molded body (plate material).
- the price went as well.
- the symbol ⁇ ⁇ '' indicates that it is particularly excellent
- the symbol ⁇ ⁇ '' indicates that all evaluation items are well-balanced and excellent
- the symbol ⁇ X '' is inferior. This shows that application to injection molded articles requiring sufficient heat resistance and rigidity is impossible.
- Table 1 The results are shown in Table 1.
- Example 1 The same evaluation (measurement) as in Example 1 was performed on the obtained injection molded body (plate material). The results are shown in Table 1.
- Example 1 The same evaluation (measurement) as in Example 1 was performed on the obtained injection molded body (plate material). The results are shown in Table 1.
- Injection molded articles were produced in the same manner as in Example 1, except that (B) only lactic acid-based resin Nature Works 4032D was used without using natural fibers.
- Example 1 The same evaluation (measurement) as in Example 1 was performed on the obtained injection molded body (plate material). The results are shown in Table 1.
- Example 1 glass fiber (average thickness 5 mm, average length 2 mm) manufactured by Nippon Sheet Glass Co., Ltd. was used instead of natural fiber. , Nature
- An injection molded body (plate material) was produced in the same manner as in Example 1 except that Works 40320: glass fiber was changed to 90:10 (mass%).
- Example 1 The same evaluation (measurement) as in Example 1 was performed on the obtained injection molded body (plate material). The results are shown in Table 1.
- Example 1 flax fiber (80% by mass of cell mouth content, 1% by mass of lignin content, and average diameter of 20 mm) manufactured by Teikoku Fibers Co., Ltd. was used instead of natural fiber.
- Production of an injection molded body (plate material) in the same manner as in Example 1 except that the ratio between the lactic acid-based resin and the flax fiber was changed to Nature Works 4032D: flax fiber 90:10 (% by mass). Was done.
- the obtained plate was evaluated (measured) in the same manner as in Example 1. The results are shown in Table 1.
- Example 1 The same evaluation (measurement) as in Example 1 was performed on the obtained injection molded body (plate material). The results are shown in Table 1.
- an injection molded body (plate material) was produced.
- Example 1 The same evaluation (measurement) as in Example 1 was performed on the obtained injection molded body (plate material). The results are shown in Table 1.
- the injection molded articles of Examples 1 to 5 had a deflection temperature under load of 133 ° C. As described above, the heat resistance was excellent, and the bending elastic modulus at 80 ° C was large and the rigidity was excellent. Furthermore, it was found that the injection molded article (resin composition) of Examples 15 to 15 had a crystallization heat peak temperature of 100 ° C. or higher and a high crystallization rate.
- the injection molded article of Comparative Example 115 had a deflection temperature under load of 132 ° C. or less and a low flexural modulus, and a peak temperature of heat of crystallization of 96 ° C. or less.
- the crystallization promoting effect is excellent, and the crystallization promoting effect is improved. Improvement of heat resistance due to the synergistic effect of reinforcement was also realized at the same time.
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602004024790T DE602004024790D1 (de) | 2003-07-30 | 2004-07-30 | Spritzgusskörper, herstellungsverfahren dafür und pellet zur verwendung für spritzgusskörper |
US10/566,818 US7682548B2 (en) | 2003-07-30 | 2004-07-30 | Injection molded article, production method thereof and pellets used for injection molded article |
EP04771077A EP1652874B1 (en) | 2003-07-30 | 2004-07-30 | Injection-molded object, process for producing the same, and pellet for use for injection-molded object |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003203536 | 2003-07-30 | ||
JP2003-203536 | 2003-07-30 |
Publications (1)
Publication Number | Publication Date |
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WO2005012398A1 true WO2005012398A1 (ja) | 2005-02-10 |
Family
ID=34113616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/010917 WO2005012398A1 (ja) | 2003-07-30 | 2004-07-30 | 射出成形体とその製造方法、並びに、射出成形体に用いられるペレット |
Country Status (6)
Country | Link |
---|---|
US (1) | US7682548B2 (ja) |
EP (2) | EP1808453A3 (ja) |
KR (1) | KR20060034301A (ja) |
CN (1) | CN100404594C (ja) |
DE (1) | DE602004024790D1 (ja) |
WO (1) | WO2005012398A1 (ja) |
Cited By (2)
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JP2009132074A (ja) * | 2007-11-30 | 2009-06-18 | Kobe Steel Ltd | 天然繊維強化熱可塑性樹脂射出成形体 |
JP2009160767A (ja) * | 2007-12-28 | 2009-07-23 | Fuji Xerox Co Ltd | 樹脂成形体、及び樹脂成形体の製造方法 |
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KR100816679B1 (ko) * | 2006-12-13 | 2008-03-27 | 제일모직주식회사 | 천연섬유 강화 폴리유산 수지 조성물 |
CN100532454C (zh) * | 2007-04-02 | 2009-08-26 | 中国科学院长春应用化学研究所 | 一种耐热聚乳酸基复合材料及其制备方法 |
JP2011523430A (ja) * | 2008-05-16 | 2011-08-11 | インドネシアン インスティテュート オブ サイエンシーズ(エルアイピーアイ) | ポリプロピレンまたはポリ乳酸を配合したケナフ・ミクロ繊維を含む複合体 |
KR101225950B1 (ko) * | 2008-12-09 | 2013-01-24 | 제일모직주식회사 | 천연섬유 강화 폴리유산 수지 조성물 |
US20100230405A1 (en) * | 2009-03-11 | 2010-09-16 | Nuvision Bioplastics, Llc | Biodegradable Resin Composition Utilized in the Manufacture of Biodegradable Containers, Biodegradable Containers, and Method of Manufacture |
WO2011116122A1 (en) * | 2010-03-16 | 2011-09-22 | Andersen Corporation | Sustainable compositions, related methods, and members formed therefrom |
US20120098160A1 (en) * | 2010-10-22 | 2012-04-26 | Sumitomo Chemical Company, Limited | Process for producing resin molded article |
KR101385879B1 (ko) * | 2011-12-26 | 2014-04-16 | (주)엘지하우시스 | 바이오 플라스틱 조성물 |
US8829097B2 (en) | 2012-02-17 | 2014-09-09 | Andersen Corporation | PLA-containing material |
ITMI20120250A1 (it) * | 2012-02-20 | 2013-08-21 | Novamont Spa | Composizione polimerica biodegradabile per la realizzazione di articoli aventi elevata temperatura di inflessione sotto carico. |
US8993705B2 (en) * | 2012-03-26 | 2015-03-31 | John R. Dorgan | Polylactide-graft-lignin blends and copolymers |
US9303127B2 (en) | 2012-08-31 | 2016-04-05 | Colorado School Of Mines | Lignin extraction from lignocellulosics |
JP5717928B2 (ja) | 2012-09-21 | 2015-05-13 | 帝人株式会社 | 複合材料の製造方法 |
WO2016026920A1 (en) * | 2014-08-21 | 2016-02-25 | Styrolution Group Gmbh | Polylactic acid composites with natural fibers |
EP3251813B1 (en) * | 2016-05-20 | 2018-09-05 | Panasonic Corporation | Composite resin molded body, manufacturing method thereof, and casing member using same |
US9873790B1 (en) * | 2016-11-07 | 2018-01-23 | Ethicon, Inc. | Absorbable polymer blend compositions having enhanced nucleation rates |
CN109233231B (zh) * | 2018-08-17 | 2020-12-18 | 东华大学 | 一种利用Pickering乳液制备木质素/聚乳酸复合薄膜的方法 |
CN109734939B (zh) * | 2019-01-20 | 2021-03-02 | 成都大学 | 一种利用冰乙酸溶解制备食品级聚乳酸薄膜的方法 |
CN113637300A (zh) * | 2021-09-02 | 2021-11-12 | 杭州卓普新材料科技有限公司 | 一种全生物质聚乳酸竹纤维复合材料及其制备方法 |
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JPH10273582A (ja) * | 1997-03-28 | 1998-10-13 | Okura Ind Co Ltd | 生分解性樹脂組成物 |
JP2001335710A (ja) * | 2000-05-26 | 2001-12-04 | Chiba Inst Of Technology | 複合材料およびその製造方法 |
JP2002060502A (ja) * | 2000-08-11 | 2002-02-26 | Kobe Steel Ltd | 繊維強化熱可塑性樹脂ペレットおよびその製法 |
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JPH09169897A (ja) | 1995-12-19 | 1997-06-30 | Unitika Ltd | 生分解性繊維強化成形体およびその製造方法 |
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JP2002146219A (ja) | 2000-11-07 | 2002-05-22 | Hitoshi Takagi | 生分解性複合材料及びその作製方法 |
JP3960749B2 (ja) | 2000-12-18 | 2007-08-15 | ユニチカファイバー株式会社 | 飲料用フィルターバッグ |
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JP3583097B2 (ja) | 2001-10-23 | 2004-10-27 | 三菱樹脂株式会社 | 乳酸系樹脂成形体 |
-
2004
- 2004-07-30 CN CNB2004800216388A patent/CN100404594C/zh not_active Expired - Fee Related
- 2004-07-30 US US10/566,818 patent/US7682548B2/en not_active Expired - Fee Related
- 2004-07-30 WO PCT/JP2004/010917 patent/WO2005012398A1/ja active Application Filing
- 2004-07-30 EP EP07008665A patent/EP1808453A3/en not_active Withdrawn
- 2004-07-30 KR KR1020067001745A patent/KR20060034301A/ko active IP Right Grant
- 2004-07-30 EP EP04771077A patent/EP1652874B1/en not_active Expired - Fee Related
- 2004-07-30 DE DE602004024790T patent/DE602004024790D1/de active Active
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JPH10273582A (ja) * | 1997-03-28 | 1998-10-13 | Okura Ind Co Ltd | 生分解性樹脂組成物 |
JP2001335710A (ja) * | 2000-05-26 | 2001-12-04 | Chiba Inst Of Technology | 複合材料およびその製造方法 |
JP2002060502A (ja) * | 2000-08-11 | 2002-02-26 | Kobe Steel Ltd | 繊維強化熱可塑性樹脂ペレットおよびその製法 |
JP2002069303A (ja) * | 2000-08-31 | 2002-03-08 | O Masaru | 植物繊維製樹脂成形体 |
JP2002115173A (ja) * | 2000-10-11 | 2002-04-19 | Kobe Steel Ltd | 繊維強化熱可塑性樹脂線材および同ペレットの製法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009132074A (ja) * | 2007-11-30 | 2009-06-18 | Kobe Steel Ltd | 天然繊維強化熱可塑性樹脂射出成形体 |
JP2009160767A (ja) * | 2007-12-28 | 2009-07-23 | Fuji Xerox Co Ltd | 樹脂成形体、及び樹脂成形体の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20060034301A (ko) | 2006-04-21 |
EP1652874A4 (en) | 2006-08-23 |
EP1808453A2 (en) | 2007-07-18 |
DE602004024790D1 (de) | 2010-02-04 |
CN1829764A (zh) | 2006-09-06 |
EP1652874B1 (en) | 2009-12-23 |
EP1808453A3 (en) | 2008-10-22 |
US7682548B2 (en) | 2010-03-23 |
EP1652874A1 (en) | 2006-05-03 |
CN100404594C (zh) | 2008-07-23 |
US20060202391A1 (en) | 2006-09-14 |
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