WO2013137344A1 - ポリプロピレン系樹脂発泡粒子からなる型内発泡成形体およびその製造方法 - Google Patents
ポリプロピレン系樹脂発泡粒子からなる型内発泡成形体およびその製造方法 Download PDFInfo
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- WO2013137344A1 WO2013137344A1 PCT/JP2013/057073 JP2013057073W WO2013137344A1 WO 2013137344 A1 WO2013137344 A1 WO 2013137344A1 JP 2013057073 W JP2013057073 W JP 2013057073W WO 2013137344 A1 WO2013137344 A1 WO 2013137344A1
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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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0028—Use of organic additives containing nitrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
- B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/18—Making expandable particles by impregnating polymer particles with the blowing agent
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
- C08J9/232—Forming foamed products by sintering expandable particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
- B29C44/3426—Heating by introducing steam in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2079/00—Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain, not provided for in groups B29K2061/00 - B29K2077/00, as moulding material
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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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
Definitions
- the present invention relates to an in-mold foam molded article made of polypropylene resin foam particles and a method for producing the same. More specifically, the present invention relates to an in-mold foam molded article that is excellent in filling property of polypropylene resin foamed particles in a thin part and has a beautiful surface property in a thin part.
- Polypropylene-based resin foam moldings are excellent in physical properties such as buffering properties and heat insulation properties, and are therefore used in various fields such as packaging materials, cushioning materials, heat insulating materials, and building materials.
- the in-mold foam molding method in which polypropylene resin foam particles are filled into a mold and heated with water vapor to fuse the foam particles together to obtain a foam with a predetermined shape is relatively easy for products of various shapes. Therefore, it is used for many purposes.
- In-mold foam moldings having a rectangular parallelepiped shape, a columnar shape, a box shape, etc. are known as polypropylene-based resin-molded foam-molded products, but the articles to be conveyed or stored in box-type returnable boxes or storage boxes are partitioned.
- An in-mold foam molded article having a complicated shape portion is also known.
- Such a complicated shape portion is often required and designed as a thin portion having a small thickness.
- the portion corresponding to the thin portion in the molding die used for in-mold molding is difficult to be filled with the polypropylene resin foamed particles, and as a result, the surface property of the thin portion of the obtained in-mold foam molded article is lowered. There is a problem.
- the opening between the polypropylene resin expanded particles on the surface of the thin part in the molded product is large, and the surface is uneven, and the edge of the thin part that is the part where the surface intersects In the part, the fusion between the polypropylene resin foam particles is poor, the edge ridge line is not a clean line, it is bumpy, and the polypropylene resin foam particles are easily peeled off and rubbed with a finger There is.
- the defective particle part adheres to the article to be stored and is mixed in as a foreign object, such as a precision instrument. It becomes a very big problem as a box-type returnable box, a storage box, etc.
- the polypropylene resin is limited to a polypropylene resin containing butene-1 as a comonomer, and an in-mold foam molded body made of such a polypropylene resin has high rigidity, but has a buffering property. Since the property and the cushioning property are low, there remains a problem that when used as a box-type returnable box, a storage box, or the like, it is not suitable for transporting easily damaged items. Conversely, in order to solve this problem, when a propylene / ethylene copolymer not containing butene-1 is used as a polypropylene resin, satisfactory buffering and cushioning properties are easily obtained. There is a problem that the surface beauty of the thin portion is deteriorated and the edge portion of the thin portion is lost.
- An object of the present invention is to improve the surface beauty of a thin-walled portion in a polypropylene resin-in-mold foam-molded product composed of polypropylene resin foam particles.
- a method for producing an in-mold foam-molded article having a thin-walled portion which is obtained by filling a mold with polypropylene resin expanded particles and then heating to obtain an in-mold foam-molded article,
- the polypropylene resin expanded particles contain an aliphatic diethanolamine fatty acid ester and an aliphatic diethanolamine, and the total content of the aliphatic diethanolamine fatty acid ester and the aliphatic diethanolamine is 0.1 weight with respect to 100 parts by weight of the polypropylene resin.
- a method for producing an in-mold foam-molded article having a thin-walled portion comprising a polypropylene-based resin composition that is not less than 5 parts by weight and not more than 5 parts by weight.
- the surface beauty of the thin portion is improved.
- FIG. 2 is an enlarged view of a rib corresponding to a thin-walled portion in the present invention in the polypropylene-based resin-molded foam-molded body of FIG. 1, which is a portion corresponding to the A surface of FIG. An example is given.
- FIG. 2 is an enlarged view of a rib corresponding to the thin wall portion in the present invention in the polypropylene resin-molded in-mold foam molded body of FIG.
- FIG. 2 is an enlarged view of a rib corresponding to the thin wall portion in the present invention in the polypropylene resin-molded in-mold foam molded body of FIG. 1 and corresponds to the A surface of FIG. 1, but the B11 surface and the B12 surface are not parallel. An example of the case is shown. It is an enlarged view of the rib which does not correspond to the thin part in this invention in a polypropylene resin-type in-mold foam molding. This is a portion corresponding to the A surface of FIG. 1 when the expanded polypropylene resin particles having an average diameter smaller than that of the expanded polypropylene resin particles in FIG.
- DSC differential scanning calorimetry
- the horizontal axis is the temperature
- the vertical axis is the endothermic amount.
- the portion surrounded by the dashed line of the low-temperature side melting heat amount peak and the line segment AB is Ql
- the portion surrounded by the high-temperature side melting heat amount peak and the line segment AC by the broken line is Qh.
- the “thin wall portion” in the in-mold foam-molded product of the present invention is opposed to a certain point on one surface between at least a pair of two opposing surfaces in the in-mold foam-molded product.
- the shortest distance from the other surface (hereinafter also simply referred to as “shortest distance”) is a distance of one or more and four or less of the polypropylene resin expanded particles, and is composed of the polypropylene resin expanded particles.
- the part which is. A set of two opposing surfaces may or may not be parallel.
- the “surface” here may be a flat surface or a curved surface.
- the “shortest distance” is a distance from a point on the other surface to a contact point when a perpendicular is extended on the plane when at least one surface is a plane.
- the part shape when the part shape is circular, substantially circular, or elliptical, it is a closed surface and there are actually no two surfaces. That is, when the part shape is circular or substantially circular, the diameter of the circle or substantially circular is the shortest distance, and when it is elliptical, the short axis length (short diameter) is the shortest distance.
- the shortest distance is a distance of one or more and four or less of the polypropylene resin expanded particles, and the portion made of the polypropylene resin expanded particles is a thin portion in the present application.
- the number of the expanded polypropylene resin particles at the shortest distance is the number of expanded polypropylene resin particles that are drawn across a straight line at the portion corresponding to the shortest distance. Therefore, the expanded polypropylene resin particles that are only in contact with this straight line are excluded.
- the portion when it becomes a “thin portion” in accordance with the above definition, whatever the number of polypropylene-based resin expanded particles between other two opposing surfaces of the same portion, the portion is a “thin portion”. To do.
- the shortest distance is preferably a distance of one or more and three or less of polypropylene resin expanded particles, and a distance of one or more and two or less. More preferably, the distance is most preferably one.
- the number of polypropylene resin expanded particles existing between some shortest distances may vary in the same part, but in the present invention, it is defined as the minimum number existing between the shortest distances. To do.
- FIG. 1 shows a box-shaped in-mold foam-molded body in which four ribs having different heights and shapes are provided on the upper surface of the bottom surface as an example of a polypropylene-based resin in-mold foam-molded body.
- the shortest distance between the B1-B2 surfaces is a portion for three polypropylene resin expanded particles and a portion for four, and according to the above definition, the shortest distance at the portion is Three ribs, that is, the rib having the A1 surface is the “thin portion” in the present invention.
- FIG. 4 shows an example in which the B1 surface and the B2 surface in FIG. 2 are not parallel (the A11 surface in FIG. 4 corresponds to the A surface in FIG. 1). Since the shortest distance X in FIG. 4 is four polypropylene resin foam particles, and the shortest distances Y and Z are three polypropylene resin foam particles, according to the above definition, the shortest distance at the part is three. In other words, the rib having the A11 surface is a “thin portion” in the present invention.
- FIG. 5 shows an enlarged view of the case where the polypropylene resin foam particles having the same shape as that of FIG. 2 but having an average diameter smaller than that of the example of FIG. 2 are used (A2 in FIG. 5).
- the plane corresponds to plane A in FIG. 1).
- the shortest distance between the B3-B4 surfaces is 6 or 6 polypropylene resin expanded particles, and according to the above definition, the shortest distance at this portion is 6 pieces, that is, The rib having the A2 surface is not the “thin portion” in the present invention.
- the distance between the two surfaces is preferably 1 mm or more and 10 mm or less, and more preferably 2 mm or more and 7 mm or less from the viewpoint that the effects of the present invention are more remarkably exhibited.
- the thin portion only has to exist in at least a part of the in-mold foam molded body.
- one rib in FIG. 1 is a thin-walled portion
- other ribs and box-shaped wall surfaces may or may not be “thin-walled portions”.
- Such a thin portion is not particularly limited, but is preferably a rib protruding from one plane as described above.
- the “rib” refers to a portion protruding from at least a part of one plane, such as the portion illustrated in FIG.
- “ribs” in FIG. 1 that extend to other standing wall surfaces facing one standing wall surface and completely partition the housing portion are also included in the “ribs” in the present invention.
- a plurality of ribs such as an in-mold foam-molded product having a structure capable of accommodating articles for each partition by ribs, and an automotive tibia pad, etc.
- examples thereof include an in-mold foam molded article.
- in-mold foam molded articles having a structure in which articles can be accommodated for each section by ribs are often designed with a thinner wall and the effect of surface aesthetics becomes remarkable.
- An in-mold foam-molded body that is a box-type and / or tray-type and has a structure in which an article can be accommodated for each section by a rib is most preferable.
- Such an in-mold foam molded article is suitably used as, for example, a tool storage box, an electronic parts carrying-through box, an automobile parts carrying-out box, a food-use carrying box, a glass substrate carrying-through box, a tool box, etc. It is done.
- polypropylene resin-in-mold foam-molded article composed of polypropylene resin foamed particles composed of a polypropylene resin composition containing a specific amount of aliphatic diethanolamine fatty acid ester and aliphatic diethanolamine of the present invention, as shown in FIG.
- the fusibility between the expanded polypropylene-based resin particles is excellent, the ridge line portion composed of the A surface and the B surface is a clean line.
- the polypropylene resin foamed particles are not easily peeled off even when the ridgeline portion of the thin portion is rubbed with a finger.
- FIG. 7 is an example according to the prior art that does not use the polypropylene resin particles of the present invention, the fusibility between the polypropylene resin foam particles is poor, and the gap between the polypropylene resin foam particles is large.
- the ridge line part which consists of A surface and B surface also has an unevenness
- the polypropylene resin in-mold foam molded product of the present invention can be obtained by molding by a general in-mold foam molding method using polypropylene resin foam particles described later.
- the polypropylene resin foamed particles are filled in a mold that can be closed but cannot be sealed, and 0.05 MPa (gauge pressure) or more and 0.5 MPa (gauge) using water vapor as a heating medium. Pressure) After heating the polypropylene resin foam particles to about 30 seconds or less with a heating water vapor pressure of about 3 seconds or less, the mold is water-cooled, and the mold is taken out from the in-mold foam molded product.
- the method include a method of opening the mold after cooling to such an extent that deformation of the inner foamed molded body can be suppressed, and obtaining an in-mold foamed molded body.
- polypropylene-based resin expanded particles to be described later when polypropylene-based resin expanded particles to be described later are used for in-mold expansion molding, a) a method of using the expanded particles as they are, and b) pressurizing an inorganic gas such as air into the expanded particles in advance.
- Conventionally known methods such as a method of forming by imparting foaming ability, and c) a method of filling the foamed particles in a mold in a compressed state and molding can be used.
- the expanded polypropylene resin particles used in the present invention are expanded particles composed of a polypropylene resin composition containing a specific amount of aliphatic diethanolamine fatty acid ester and aliphatic diethanolamine.
- the polypropylene resin used in the present invention is not particularly limited, and is a polypropylene homopolymer, ethylene / propylene random copolymer, butene-1 / propylene random copolymer, ethylene / butene-1 / propylene random copolymer, Examples thereof include ethylene / propylene block copolymers, butene-1 / propylene block copolymers, propylene-chlorinated vinyl copolymers, and propylene / maleic anhydride copolymers.
- an ethylene / propylene random copolymer and a / ethylene / butene-1 / propylene random copolymer are preferable because they have good foamability and good moldability.
- the ethylene content in the ethylene / propylene random copolymer or ethylene / butene-1 / propylene random copolymer is preferably 0.2% by weight or more and 10% by weight or less in 100% by weight of each copolymer.
- the butene-1 is synonymous with 1-butene.
- the butene content in the ethylene / butene-1 / propylene random copolymer is preferably 0.2% by weight or more and 10% by weight or less in 100% by weight of the copolymer.
- the total content of ethylene and butene-1 is preferably 0.5% by weight or more and 10% by weight or less.
- the melting point of the polypropylene resin used in the present invention is not particularly limited, and is preferably 125 ° C. or higher and 155 ° C. or lower, and more preferably 130 ° C. or higher and 150 ° C. or lower.
- the melting point is less than 125 ° C., the heat resistance tends to decrease, and when it exceeds 155 ° C., it tends to be difficult to increase the expansion ratio.
- the melting point of the polypropylene resin is measured by a differential scanning calorimetry method (hereinafter referred to as “DSC method”). Specifically, 5 to 6 mg of the resin is heated at 10 ° C./min. After the temperature was increased from 40 ° C. to 220 ° C. and melted, the temperature was decreased from 220 ° C. to 40 ° C. at a rate of 10 ° C./min. From the DSC curve obtained when the temperature is raised from 40 ° C. to 220 ° C., the melting peak temperature at the second temperature rise can be determined as the melting point.
- DSC method differential scanning calorimetry method
- the melt index (hereinafter referred to as “MI”) of the polypropylene resin used in the present invention is not particularly limited, but is preferably 3 g / 10 min to 30 g / 10 min, preferably 4 g / 10 min to 20 g / 10 min. The following is more preferable, and 5 g / 10 min or more and 18 g / 10 min or less is more preferable.
- the MI of the polypropylene resin When the MI of the polypropylene resin is less than 3 g / 10 minutes, it tends to be difficult to increase the expansion ratio. When the MI of the polypropylene resin exceeds 30 g / 10 minutes, the bubbles of the obtained polypropylene resin foamed particles are connected, and the compression strength of the polypropylene resin in-mold foam molded product tends to decrease, or the surface property tends to decrease. There is.
- the MI of the polypropylene resin is in the range of 3 g / 10 min or more and 30 g / 10 min or less, it is easy to obtain polypropylene resin expanded particles having a relatively large expansion ratio. Furthermore, the polypropylene resin in-mold foam-molded product obtained by in-mold foam molding of the polypropylene resin foam particles has excellent surface beauty and small dimensional shrinkage.
- the MI value is an MI measuring instrument described in JIS K7210: 1999, with an orifice of 2.0959 ⁇ 0.005 mm ⁇ , an orifice length of 8.000 ⁇ 0.025 mm, a load of 2160 g, and 230 ⁇ 0.2 ° C. It is the value measured below.
- the polymerization catalyst for synthesizing the polypropylene resin used in the present invention is not particularly limited, and a Ziegler catalyst, a metallocene catalyst, or the like can be used.
- the in-mold foam molded article constituted by the polypropylene resin expanded particles by using the polypropylene resin expanded particles composed of a polypropylene resin composition containing an aliphatic diethanolamine fatty acid ester and an aliphatic diethanolamine.
- the surface beauty of the thin wall portion is improved.
- the inventors of the present invention have focused on aliphatic diethanolamine fatty acid esters and aliphatic diethanolamines, which have been conventionally considered difficult to improve the surface beauty of polypropylene resin expanded particles, and use these predetermined amounts in combination. Thus, it has been found that the surface beauty of the expanded polypropylene resin particles can be improved.
- the total content of aliphatic diethanolamine fatty acid ester and aliphatic diethanolamine is 0.1 to 5 parts by weight with respect to 100 parts by weight of the polypropylene resin. It is more preferably 15 parts by weight or more and 3 parts by weight or less, and further preferably 0.5 parts by weight or more and 1.5 parts by weight or less.
- the surface beauty of the thin part tends to be difficult to be improved.
- the total content exceeds 5 parts by weight, the effect of improving the surface beauty of the thin part becomes saturated, and the weight of the polypropylene resin particles is stabilized in the process of producing the polypropylene resin particles described later. It tends to be difficult to manufacture.
- the surface of the polypropylene resin foamed particles and the polypropylene resin in-mold foam molding tends to be sticky.
- the stability of the dispersion in the single-stage foaming step described later is lowered, and the obtained single-stage foamed particles are obtained in a state of being adhered to each other (that is, obtained as coalesced particles). May be). If such coalesced particles are included, there is a possibility that the subsequent molding process may not be stable, and an operation such as sieving with a sieve may be required before the molding process.
- the weight ratio of the aliphatic diethanolamine fatty acid ester in the total weight of the aliphatic diethanolamine fatty acid ester and the aliphatic diethanolamine is not particularly limited.
- the total weight is 100% by weight, it is preferably 5% by weight or more and 95% by weight or less, more preferably 20% by weight or more and 95% by weight or less, and 40% by weight or more and 95% by weight or less. Is more preferable.
- the weight ratio of the aliphatic diethanolamine fatty acid ester is 5% by weight or more, there is a tendency that the effect of improving the surface beauty of the thin-walled portion can be preferably expressed, and the deterioration of the polypropylene resin tends to be suppressed, and 95% by weight.
- the surface beauty improvement effect of a thin part can be expressed suitably.
- the aliphatic diethanolamine fatty acid ester used in the present invention is not particularly limited, but the effect of improving the surface beauty of the thin-walled portion is sufficiently expressed, the surface is not sticky, and from the viewpoint of not promoting the deterioration of the resin, the general formula It is preferable that it is a compound represented by (1).
- the aliphatic diethanolamine fatty acid ester may be composed of only a single compound having the predetermined R 1 and R 2 , and at least one of R 1 and R 2 may have a plurality of different carbon numbers. It may be a mixture containing a compound.
- aliphatic diethanolamine fatty acid esters include lauryl diethanolamine monolaurate, lauryl diethanolamine monomyristic ester, lauryl diethanolamine monopentadecyl ester, lauryl diethanolamine monopalmitate, lauryl diethanolamine monomargaric acid.
- esters lauryl diethanolamine monostearate, lauryl diethanolamine monoarachidic acid ester, lauryl diethanolamine monobehenate ester, lauryl diethanolamine monolignocerate ester; Myristyl diethanolamine monolaurate, myristyl diethanolamine monomyristate, myristyl diethanolamine monopentadecyl ester, myristyl diethanolamine monopalmitate, myristyl diethanolamine monomalgarate, myristyl diethanolamine monostearate, myristyl diethanolamine monoarachidic acid ester , Myristyl diethanolamine monobehenate, myristyl diethanolamine monolignocerate; Pentadecyl diethanolamine monolaurate, pentadecyl diethanolamine monomyristic ester, pentadecyl diethanolamine monopentadecyl ester, pentadecyl diethanolamine monopalmitate, penta
- aliphatic diethanolamine may be composed of only a single compound having a predetermined R 3, the carbon number of R 3 may be a mixture containing different compounds.
- aliphatic diethanolamines include lauryl diethanolamine, myristyl diethanolamine, pentadecyl diethanolamine, palmityl diethanolamine, margaryl diethanolamine, stearyl diethanolamine, arachidyl diethanolamine, behenyl diethanolamine, lignoceryl diethanolamine, and the like. . These may be used alone or in combination of two or more.
- stearyl is preferred from the viewpoints of good compatibility with polypropylene resins, a synergistic effect with stearyl diethanolamine monostearate, and an effect of improving the surface beauty of thin portions.
- the content of the aliphatic alcohol is 0.001 part by weight or more and 2 parts by weight or less with respect to 100 parts by weight of the polypropylene resin.
- the aliphatic alcohol is less than 0.001 part by weight, the effect of improving the surface beauty of the thin part tends to be small, and if it exceeds 2 parts by weight, the sticky feeling tends to increase.
- the aliphatic alcohol may be composed of only a single compound having a predetermined R 4 , or may be a mixture including a plurality of compounds having different R 4 carbon numbers.
- aliphatic alcohols include lauryl alcohol, myristyl alcohol, pentadecyl alcohol, palmityl alcohol, margaryl alcohol, stearyl alcohol, arachidyl alcohol, behenyl alcohol, and lignoceryl alcohol. These may be used alone or in combination of two or more.
- the aliphatic diethanolamine fatty acid ester and the aliphatic diethanolamine, and if necessary, the aliphatic alcohol is masterbatched in advance using the same resin as the main component of the polypropylene resin composition or a different resin. It is also possible to mix the masterbatch with a polypropylene resin.
- the aliphatic diethanolamine fatty acid ester, the aliphatic diethanolamine, and, if necessary, the aliphatic alcohol may be mixed in advance before being contained in the polypropylene resin.
- Examples of commercially available products in which these are premixed include, for example, electrostripper TS-11B (manufactured by Kao Corporation) in which stearyl diethanolamine monostearate and stearyl diethanolamine are mixed, stearyl diethanolamine monostearate, stearyl diethanolamine and aliphatic There are electro strippers TS-15B (manufactured by Kao Corporation) mixed with alcohol. In the present invention, these commercially available products can be used.
- additives can be added as long as the effects of the present invention are not impaired.
- organic pigments, antioxidants, light resistance improvers, bubble nucleating agents, A flame retardant, a water absorbing compound, etc. can be mentioned.
- organic pigment examples include, but are not limited to, perylene-based, polyazo-based, and quinacridone-based organic pigments.
- the content of the organic pigment is from 0.001 part by weight to 0.1 part by weight with respect to 100 parts by weight of the polypropylene resin from the viewpoint of dispersibility (coloring uniformity) and the effect of improving the surface beauty of the thin part. preferable.
- the content of the organic pigment exceeds 0.1 parts by weight, the cell diameter of the polypropylene resin expanded particles becomes fine, and the surface property of the polypropylene resin in-mold foam molded product obtained from the polypropylene resin expanded particles is inferior, In particular, the surface beauty of the thin wall portion tends to decrease.
- These organic pigments should be masterbatched in advance using the same or different resin as the polypropylene resin that is the main component of the polypropylene resin composition, and this masterbatch is mixed with the polypropylene resin. Is also possible.
- antioxidants examples include, but are not limited to, phenolic antioxidants and phosphorus antioxidants.
- Examples of the light resistance improver include, but are not limited to, a hindered amine light resistance improver.
- bubble nucleating agent examples include, but are not limited to, talc, kaolin, barium sulfate, zinc borate, silicon dioxide, and the like.
- flame retardant examples include, but are not limited to, halogen flame retardants, phosphorus flame retardants, hindered amine flame retardants, and the like.
- the water-absorbing compound examples include substances capable of absorbing water and releasing the absorbed water when foaming to allow water to act as a foaming agent.
- Specific examples of the water-absorbing compound include polyethylene glycol, glycerin, melamine and the like, but are not limited thereto.
- polyethylene glycol is preferable, and polyethylene glycol having an average molecular weight of 200 to 6000 is more preferable.
- the polypropylene resin composition in the present invention is usually melt-kneaded in advance using an extruder, kneader, Banbury mixer, roll, etc. so as to be easily used for foaming, and is cylindrical, elliptical, spherical, cubic, rectangular parallelepiped.
- the resin particles are molded into a desired particle shape such as a cylindrical shape or a cylindrical shape (straw shape) to obtain polypropylene resin particles.
- the shape of the polypropylene resin particles is not necessarily the shape of the polypropylene resin foam particles, and for example, the polypropylene resin particles may shrink in the foaming process.
- spherical polypropylene-based resin expanded particles can be obtained from the resin-based resin particles.
- polypropylene resin particles from the viewpoint of productivity, it is possible to melt and knead using an extruder, extrude into a strand form from the tip of the extruder, and then cut into polypropylene resin particles by cutting. More preferred.
- aliphatic diethanolamine fatty acid ester and aliphatic diethanolamine, aliphatic alcohol as necessary, and other additives are usually added to the polypropylene resin before melting or in the process of producing polypropylene resin particles, and extruded. It is preferable to melt and knead with a machine. By doing in this way, aliphatic diethanolamine fatty acid ester and aliphatic diethanolamine, aliphatic alcohol as needed, and other additives can be uniformly dispersed in the polypropylene resin.
- the average particle diameter of the polypropylene resin particles used in the present invention is preferably from 0.1 mm to 10 mm, more preferably from 0.5 mm to 5 mm.
- the average particle diameter of the polypropylene resin particles is an arithmetic average value of the particle diameters measured for any 20 polypropylene resin particles.
- the average weight of the polypropylene resin particles used in the present invention is preferably from 0.1 mg / grain to 100 mg / grain, more preferably from 0.3 mg / grain to 10 mg / grain.
- the average weight is an arithmetic average value of the weights of arbitrary 10 polypropylene resin particles.
- the expanded polypropylene resin particles of the present invention can be manufactured as follows.
- the temperature is raised above the softening point temperature of the polypropylene resin particles. If necessary, the temperature after the temperature increase is maintained for more than 0 minutes and not more than 120 minutes, and then the dispersion in the pressure vessel is discharged to a pressure range lower than the internal pressure of the pressure vessel, and the polypropylene resin expanded particles Can be manufactured.
- the dispersion is a mixed liquid in which polypropylene resin particles, an aqueous medium, an inorganic dispersant, a foaming agent, and the like are contained in a pressure vessel and dispersed under stirring conditions.
- the temperature rise temperature is the melting point of the polypropylene resin ⁇ 20 ° C. or higher, the melting point of the polypropylene resin + 10 ° C. or lower, or the polypropylene resin particles
- the temperature rise is appropriately determined depending on the type of polypropylene resin used as a raw material, the expansion ratio, the DSC ratio described later, and the like, and may need to be appropriately changed depending on the foaming agent used.
- the melting point of the polypropylene resin particles was measured by the DSC method. Specifically, 5 to 6 mg of polypropylene resin particles were heated from 40 ° C. to 220 ° C. at a heating rate of 10 ° C./min. And then crystallized by lowering the temperature from 220 ° C. to 40 ° C. at a rate of 10 ° C./min, and then when heated from 40 ° C. to 220 ° C. at a rate of 10 ° C./min. From the obtained DSC curve, the melting peak temperature at the second temperature increase can be determined as the melting point.
- the pressure range lower than the internal pressure of the pressure vessel is preferably atmospheric pressure.
- aqueous medium used in the present invention for example, water, alcohol, ethylene glycol, glycerin and the like can be used alone or in combination, but water is preferably used from the viewpoint of foamability, workability or safety. It is most preferable to use water alone.
- the amount of the aqueous medium can be used as 50 to 500 parts by weight, preferably 100 to 350 parts by weight, with respect to 100 parts by weight of the polypropylene resin particles.
- Examples of the inorganic dispersant used in the present invention include tribasic calcium phosphate, tribasic magnesium phosphate, basic magnesium carbonate, calcium carbonate, basic zinc carbonate, aluminum oxide, iron oxide, titanium oxide, aluminosilicate, Examples thereof include kaolin and barium sulfate, and these can be used alone or in combination. From the viewpoint of the stability of the dispersion, tricalcium phosphate, kaolin or barium sulfate is preferred.
- a dispersion aid in order to increase the stability of the dispersion in the pressure vessel.
- the dispersion aid include sodium dodecylbenzenesulfonate, sodium alkanesulfonate, sodium alkylsulfonate, sodium alkyldiphenyl ether disulfonate, sodium ⁇ -olefin sulfonate, and the like.
- the amount of the inorganic dispersant or dispersion aid used varies depending on the type and the type and amount of polypropylene resin particles used, but usually 0.1 part by weight of the inorganic dispersant with respect to 100 parts by weight of the aqueous medium.
- the amount is preferably 5 parts by weight or less and preferably 0.001 part by weight or more and 0.3 part by weight or less.
- foaming agent used in the present invention examples include organic foaming agents such as propane, normal butane, isobutane, normal pentane, isopentane, hexane, cyclopentane, and cyclobutane, and inorganic foams such as carbon dioxide, water, air, and nitrogen. Agents. These foaming agents may be used alone or in combination of two or more.
- isobutane and normal butane are more preferable from the viewpoint of easily improving the expansion ratio.
- inorganic foaming agents such as carbon dioxide, water, air and nitrogen are preferable, and a foaming agent containing carbon dioxide is more preferable.
- the amount of the foaming agent used is not limited, and may be appropriately used according to the desired expansion ratio of the polypropylene resin expanded particles. Usually, the amount is 2 with respect to 100 parts by weight of the polypropylene resin particles. It is preferable that it is not less than 60 parts by weight.
- water when water is used as the foaming agent, water can be used as an aqueous medium for dispersing the polypropylene resin particles in the pressure resistant container.
- the polypropylene resin particles when water is used as the foaming agent, the polypropylene resin particles can easily absorb water in the pressure vessel by preliminarily containing the water-absorbing compound in the polypropylene resin particles. It becomes easy to utilize as a foaming agent.
- pressure vessel used in the production of the polypropylene resin expanded particles there is no particular limitation on the pressure vessel used in the production of the polypropylene resin expanded particles, and any pressure vessel that can withstand the pressure in the vessel and the temperature in the vessel may be used.
- an autoclave type pressure vessel may be mentioned.
- single-stage foam particles having an expansion ratio of 2 to 35 times are produced, and the single-stage foam particles are placed in a pressure-resistant container, and 0.1 MPa (gauge pressure) or more with nitrogen, air, carbon dioxide, etc.
- the pressure inside the first-stage expanded particles is made higher than the normal pressure by pressurizing at a pressure of 6 MPa (gauge pressure) or less, and the first-stage expanded particles are further foamed by heating with steam or the like. It is possible to increase.
- this foaming process is referred to as “two-stage foaming process”, and the obtained polypropylene resin foamed particles are referred to as “two-stage foamed particles”.
- the shape of the expanded polypropylene resin particles of the present invention is preferably spherical or substantially spherical in view of the filling property into the mold when performing in-mold foam molding, but is not limited thereto.
- a cylindrical shape, an elliptical shape, a rectangular parallelepiped shape, Cylindrical (straw) polypropylene-based resin expanded particles are used.
- the average diameter (particle diameter) when the polypropylene resin expanded particles are spherical or substantially spherical is not particularly limited, and varies depending on the size of the polypropylene resin particles before expansion, the expansion ratio, and the like. However, 0.5 mm or more and 10 mm or less are preferable, 1 mm or more and 7 mm or less are more preferable, and 2 mm or more and 5 mm or less are more preferable.
- the average diameter of the polypropylene resin foamed particles is less than 0.5 mm, the workability at the time of in-mold foam molding tends to be poor, and when it exceeds 10 mm, for example, a molded product having a thin part cannot be produced. There is a tendency for the body shape to be limited.
- the average diameter of the expanded polypropylene resin particles is an arithmetic average value of the diameters measured for 20 arbitrary expanded polypropylene resin particles.
- the diameter of each expanded particle is an arithmetic average value of the longest diameter and the shortest diameter of the polypropylene resin expanded particles.
- the diameter of one place may be measured.
- the average weight of the expanded polypropylene resin particles of the present invention is generally the same as that of the polypropylene resin particles, preferably 0.1 mg / grain or more and 100 mg / grain or less, and 0.3 mg / grain or more and 10 mg / grain or less. More preferably.
- the average weight is an arithmetic average value of the weights of arbitrary ten polypropylene resin expanded particles.
- the expansion ratio of the expanded polypropylene resin particles of the present invention is preferably 2 to 60 times, more preferably 3 to 40 times.
- the expansion ratio is a true magnification that can be calculated from the density of the polypropylene resin composition before foaming, the weight of the polypropylene resin expanded particles, and the submerged volume.
- the expanded polypropylene resin particles of the present invention are preferably expanded polypropylene resin particles having two melting peaks in a DSC curve obtained when calorimetric measurement is performed by the DSC method.
- the melting peak calorie based on the low temperature side melting point is Ql (J / g)
- the melting peak calorie based on the high temperature side melting point is Qh (J / g).
- the ratio of the peak heat amount to the total heat amount of the melting peak (Qh / (Ql + Qh)) ⁇ 100 (%) (hereinafter sometimes referred to as DSC ratio) is more preferably 10% or more and 50% or less, and more preferably 15% or more. Most preferably, it is 45% or less. When the DSC ratio is within the range, it is easy to obtain a wide range of molding process conditions.
- the DSC curve is a curve obtained by heating 5 to 6 mg of polypropylene resin expanded particles from 40 ° C. to 220 ° C. at a rate of 10 ° C./min by the DSC method.
- An example of such a DSC curve is shown in FIG.
- the melting peak calorie Ql based on the low temperature side melting point is the melting start base from the maximum point between the melting peak based on the low temperature side melting point of the DSC curve and the melting peak based on the low temperature side melting point and the melting peak based on the high temperature side melting point. It is the amount of heat surrounded by a tangent to the line (line segment AB).
- the melting peak calorie Qh based on the high temperature side melting point is the melting end base from the maximum point between the melting peak based on the high temperature side melting point of the DSC curve and the melting peak based on the low temperature side melting point and the melting peak based on the high temperature side melting point. The amount of heat enclosed by the tangent to the line (line segment AC).
- Such a DSC ratio can be adjusted by changing the temperature rising temperature in the foaming step and the holding time held at the temperature rising temperature after the temperature rising until the dispersion in the pressure vessel is released. For example, if the temperature rise (foaming temperature) is lowered, the DSC ratio tends to increase, and the DSC ratio tends to increase even if the holding time is increased.
- the present invention includes an in-mold foam molded article having a thin wall portion and a method for producing the in-mold foam molded article (the following [1] and [10]), and further includes the following [2] to [9] And [11].
- An in-mold foam-molded article having a thin-walled part which is composed of polypropylene resin foam particles,
- the polypropylene resin expanded particles contain an aliphatic diethanolamine fatty acid ester and an aliphatic diethanolamine, And the total content of the said aliphatic diethanolamine fatty acid ester and aliphatic diethanolamine consists of a polypropylene resin composition which is 0.1 to 5 parts by weight with respect to 100 parts by weight of the polypropylene resin.
- An in-mold foam-molded article having a thin-walled portion having a thin-walled portion.
- the weight ratio of the aliphatic diethanolamine fatty acid ester is 5% by weight to 95% by weight, 1] The in-mold foam-molded article described in 1).
- the aliphatic diethanolamine fatty acid ester is a compound represented by the general formula (1)
- the aliphatic diethanolamine is a compound represented by the general formula (2), ] Or the in-mold foam molded article according to [2].
- the polypropylene resin composition is a polypropylene resin composition further containing an aliphatic alcohol in an amount of 0.001 part by weight to 2 parts by weight with respect to 100 parts by weight of the polypropylene resin.
- the shortest distance between a certain point on one surface and the other surface facing the surface between a pair of opposed two surfaces of at least a part of the in-mold foamed molded product is a polypropylene resin foam
- the shortest distance between a certain point on one surface and the other surface facing the surface between a pair of opposing two surfaces of at least a part of the in-mold foamed molded product is a polypropylene resin foam
- the in-mold foam-molded body having the thin-walled portion has a structure capable of accommodating articles for each section by ribs, and the ribs are thin-walled portions, [1] to [8]
- a method for producing an in-mold foam-molded article having a thin-walled portion which is obtained by filling a mold with polypropylene resin foamed particles and then heating to obtain an in-mold foam-molded article,
- the polypropylene resin expanded particles contain an aliphatic diethanolamine fatty acid ester and an aliphatic diethanolamine, and the total content of the aliphatic diethanolamine fatty acid ester and the aliphatic diethanolamine is 0.1 weight with respect to 100 parts by weight of the polypropylene resin.
- a method for producing an in-mold foam-molded article having a thin-walled portion comprising a polypropylene-based resin composition that is not less than 5 parts by weight and not more than 5 parts by weight.
- the polypropylene resin composition is a polypropylene resin composition further containing 0.001 part by weight or more and 2 parts by weight or less of an aliphatic alcohol with respect to 100 parts by weight of the polypropylene resin.
- polypropylene resins and additives used in the examples and comparative examples are as follows.
- Polypropylene resinPolypropylene resin A [manufactured by Prime Polymer Co., Ltd., F227A]: ethylene / propylene random copolymer having a melting point of 143 ° C., an ethylene content of 3.6% by weight, and MI 7.0 g / 10 min.
- Resin B [manufactured by Prime Polymer Co., Ltd., E314M]: melting point 145 ° C., ethylene content 3% by weight, butene-1 content 1.5% by weight, MI 5.0 g / 10 min ethylene / butene-1 / propylene random Copolymer (2) Aliphatic diethanolamine fatty acid ester Stearyl diethanolamine monostearate [manufactured by Kao Corporation, Electro Stripper TS-6B] (3) Aliphatic diethanolamine Stearyl diethanolamine [manufactured by Tokyo Chemical Industry Co., Ltd., reagent] ⁇ Lauryldiethanolamine [Wako Pure Chemical Industries, Reagents] (4) Aliphatic alcohol Stearyl alcohol [Wako Pure Chemical Industries, Reagent] ⁇ Lauryl alcohol [Wako Pure Chemical Industries, Reagents] (5) Main additives other than those described above ⁇ N-hydroxyethyl-N- [2-hydroxyalkyl] amine [Daisper 125B,
- Expansion ratio of polypropylene resin expanded particles d ⁇ v / w (Bulk density of polypropylene resin expanded particles)
- the obtained polypropylene resin foamed particles were gently put into a 10 L container having a wide opening until overflowing, and then the mouth of the 10 L container was worn so that the polypropylene resin foam particles became 10 L.
- the volume was divided by 10 L, and the bulk density was expressed in units of g / L.
- DSC ratio of polypropylene resin expanded particles Using a differential scanning calorimeter DSC [manufactured by Seiko Instruments Inc .: DSC6200 type], 5-6 mg of polypropylene resin foam particles are heated from 40 ° C. to 220 ° C. at a temperature rising rate of 10 ° C./min. Got.
- This DSC curve shows two melting peaks, where Ql (J / g) is the melting peak calorie based on the low-temperature melting point and Qh (J / g) is the melting peak calorie based on the high-temperature melting point.
- the DSC ratio was determined by the ratio (Qh / (Ql + Qh)) ⁇ 100 (%) of the melting peak heat amount based on the total melting peak heat amount.
- FIG. 8 Shape of in-mold foam molding for evaluation
- P150N manufactured by Toyo Machine Metal Co., Ltd.
- a box-shaped in-mold foam-molded body having one rib having a and b faces shown in FIG. 8 was obtained by in-mold foam molding.
- the box-shaped outer dimensions are 200 mm long ⁇ 210 mm wide ⁇ 150 mm high, and the thickness is all uniform and 15 mm.
- the rib which has a surface and b surface is located in the center of a box-shaped in-mold foam-molding body bottom part, and a rib shape outer dimension is 50 mm long x 7 mm wide x 120 mm in height. And it evaluated by the content described below by making the rib which has this a surface and b surface into evaluation object.
- Examples 1 to 18, Comparative Examples 1 to 7 [Production of polypropylene resin particles]
- the type and amount of polypropylene resin and additives shown in Table 1 or Table 2 were mixed with 0.01 part by weight of the organic pigment perylene red, and melt kneading (resin temperature 210 ° C. using a 50 mm ⁇ single screw extruder). And then extruded into a strand shape from the tip of the extruder and then granulated by cutting to produce polypropylene resin particles (1.2 mg / particle).
- Comparative Example 7 was stopped because stable extrusion was not possible, the discharge amount of the molten resin was not constant, and the weight of the polypropylene resin particles varied greatly.
- the dispersion After holding, while maintaining the foaming pressure with the same kind of gaseous substance as the foaming agent used in the pressure vessel, the dispersion is discharged under atmospheric pressure through a 3 mm ⁇ orifice provided at the bottom of the pressure vessel, and is almost spherical. Single-stage expanded particles were obtained. Then, it dried at 75 degreeC for 24 hours.
- Example 12 the dispersion stability of the dispersion in the pressure vessel was unstable, and some of the resulting single-stage foamed particles adhered to each other and were obtained as coalesced particles. The coalesced particles were removed.
- the in-mold foam molded product taken out from the mold was dried and cured in a dryer at 70 ° C. for 24 hours, and then the surface beauty of the thin-walled portion having a rib shape outer dimension of 50 mm long ⁇ 7 mm wide ⁇ 120 mm high evaluated.
- the results are shown in Table 1 or Table 2.
- the dispersion After being held, the dispersion is released under atmospheric pressure through a 3 mm ⁇ orifice provided at the bottom of the pressure vessel while maintaining the foaming pressure with the same kind of gaseous material as the foaming agent used in the pressure vessel. Expanded particles were obtained. Then, it dried at 75 degreeC for 24 hours.
- the first-stage expanded particles were each charged into a 1 m 3 pressure-resistant container and air-pressurized to give an internal pressure higher than normal pressure to the first-stage expanded particles. Subsequently, after transferring to a two-stage foaming machine, it was further foamed by heating with water vapor to obtain substantially spherical two-stage foamed particles. At this time, the foamed particle internal pressure and the water vapor pressure were set to the values shown in Table 3 or Table 4 (two-stage foaming conditions).
- the dispersion was discharged under a saturated water vapor pressure of 0.05 MPa-G through a 3 mm ⁇ orifice provided at the lower part of the pressure vessel while maintaining the foaming pressure inside with air to obtain substantially spherical single-stage expanded particles. Then, it dried at 75 degreeC for 24 hours.
- the obtained first-stage expanded particles were charged into a 1 m 3 pressure-resistant container and air-pressurized to give an internal pressure higher than normal pressure to the first-stage expanded particles. Subsequently, after transferring to a two-stage foaming machine, it was further foamed by heating with water vapor to obtain substantially spherical two-stage foamed particles.
- the foamed particle internal pressure and water vapor pressure at this time were the values shown in Table 5 (two-stage foaming conditions).
- Example 30 [Production of polypropylene resin particles]
- the types and amounts of polypropylene resins and additives shown in Table 5 were mixed with 0.01 parts by weight of the organic pigment perylene red, kneaded with a 50 mm ⁇ extruder (resin temperature 210 ° C.), and then in a strand form from the tip of the extruder And then extruded to produce polypropylene resin particles (1.2 mg / grain).
- the aqueous dispersion was discharged under atmospheric pressure through a 5 mm ⁇ orifice provided at the bottom of the container to obtain substantially spherical single-stage expanded particles. Then, it dried at 75 degreeC for 24 hours.
- foamed molded product in polypropylene resin mold Next, after the obtained first-stage expanded particles were charged into a 1 m 3 pressure vessel, air pressure was applied to give an internal pressure higher than normal pressure to the first-stage expanded particles, and then a box-shaped mold having one rib shown in FIG. The mold for obtaining the inner foam molded body was filled, heated and fused with water vapor to obtain the in-mold foam molded body, which was taken out from the mold.
- the foamed particle internal pressure and water vapor pressure at this time were the values shown in Table 5 (molding conditions). After the in-mold foam molded body taken out from the mold is dried and cured in a dryer at 70 ° C. for 24 hours, the surface beauty of the thin wall portion having a rib shape outer dimension of 50 mm long ⁇ 7 mm wide ⁇ 120 mm high is evaluated. did. The results are shown in Table 5.
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Abstract
Description
・ポリプロピレン系樹脂発泡粒子により構成される、薄肉部を有する型内発泡成形体であって、
前記ポリプロピレン系樹脂発泡粒子が、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンを含有し、
かつ、前記脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計含有量が、ポリプロピレン系樹脂100重量部に対して0.1重量部以上5重量部以下であるポリプロピレン系樹脂組成物からなることを特徴とする、薄肉部を有する型内発泡成形体。
・ポリプロピレン系樹脂発泡粒子を金型に充填した後、加熱して型内発泡成形体を得る、薄肉部を有する型内発泡成形体の製造方法であって、
ポリプロピレン系樹脂発泡粒子が、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンを含有し、かつ、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計含有量が、ポリプロピレン系樹脂100重量部に対して0.1重量部以上5重量部以下であるポリプロピレン系樹脂組成物からなることを特徴とする、薄肉部を有する型内発泡成形体の製造方法。
ミリスチルジエタノールアミンモノラウリン酸エステル、ミリスチルジエタノールアミンモノミリスチン酸エステル、ミリスチルジエタノールアミンモノペンタデシル酸エステル、ミリスチルジエタノールアミンモノパルミチン酸エステル、ミリスチルジエタノールアミンモノマルガリン酸エステル、ミリスチルジエタノールアミンモノステアリン酸エステル、ミリスチルジエタノールアミンモノアラキジン酸エステル、ミリスチルジエタノールアミンモノベヘン酸エステル、ミリスチルジエタノールアミンモノリグノセリン酸エステル;
ペンタデシルジエタノールアミンモノラウリン酸エステル、ペンタデシルジエタノールアミンモノミリスチン酸エステル、ペンタデシルジエタノールアミンモノペンタデシル酸エステル、ペンタデシルジエタノールアミンモノパルミチン酸エステル、ペンタデシルジエタノールアミンモノマルガリン酸エステル、ペンタデシルジエタノールアミンモノステアリン酸エステル、ペンタデシルジエタノールアミンモノアラキジン酸エステル、ペンタデシルジエタノールアミンモノベヘン酸エステル、ペンタデシルジエタノールアミンモノリグノセリン酸エステル;
パルミチルジエタノールアミンモノラウリン酸エステル、パルミチルジエタノールアミンモノミリスチン酸エステル、パルミチルジエタノールアミンモノペンタデシル酸エステル、パルミチルジエタノールアミンモノパルミチン酸エステル、パルミチルジエタノールアミンモノマルガリン酸エステル、パルミチルジエタノールアミンモノステアリン酸エステル、パルミチルジエタノールアミンモノアラキジン酸エステル、パルミチルジエタノールアミンモノベヘン酸エステル、パルミチルジエタノールアミンモノリグノセリン酸エステル;
マルガリルジエタノールアミンモノラウリン酸エステル、マルガリルジエタノールアミンモノミリスチン酸エステル、マルガリルジエタノールアミンモノペンタデシル酸エステル、マルガリルジエタノールアミンモノパルミチン酸エステル、マルガリルジエタノールアミンモノマルガリン酸エステル、マルガリルジエタノールアミンモノステアリン酸エステル、マルガリルジエタノールアミンモノアラキジン酸エステル、マルガリルジエタノールアミンモノベヘン酸エステル、マルガリルジエタノールアミンモノリグノセリン酸エステル;
ステアリルジエタノールアミンモノラウリン酸エステル、ステアリルジエタノールアミンモノミリスチン酸エステル、ステアリルジエタノールアミンモノペンタデシル酸エステル、ステアリルジエタノールアミンモノパルミチン酸エステル、ステアリルジエタノールアミンモノマルガリン酸エステル、ステアリルジエタノールアミンモノステアリン酸エステル、ステアリルジエタノールアミンモノアラキジン酸エステル、ステアリルジエタノールアミンモノベヘン酸エステル、ステアリルジエタノールアミンモノリグノセリン酸エステル;
アラキジルジエタノールアミンモノラウリン酸エステル、アラキジルジエタノールアミンモノミリスチン酸エステル、アラキジルジエタノールアミンモノペンタデシル酸エステル、アラキジルジエタノールアミンモノパルミチン酸エステル、アラキジルジエタノールアミンモノマルガリン酸エステル、アラキジルジエタノールアミンモノステアリン酸エステル、アラキジルジエタノールアミンモノアラキジン酸エステル、アラキジルジエタノールアミンモノベヘン酸エステル、アラキジルジエタノールアミンモノリグノセリン酸エステル;
ベヘニルジエタノールアミンモノラウリン酸エステル、ベヘニルジエタノールアミンモノミリスチン酸エステル、ベヘニルジエタノールアミンモノペンタデシル酸エステル、ベヘニルジエタノールアミンモノパルミチン酸エステル、ベヘニルジエタノールアミンモノマルガリン酸エステル、ベヘニルジエタノールアミンモノステアリン酸エステル、ベヘニルジエタノールアミンモノアラキジン酸エステル、ベヘニルジエタノールアミンモノベヘン酸エステル、ベヘニルジエタノールアミンモノリグノセリン酸エステル;
リグノセリルジエタノールアミンモノラウリン酸エステル、リグノセリルジエタノールアミンモノミリスチン酸エステル、リグノセリルジエタノールアミンモノペンタデシル酸エステル、リグノセリルジエタノールアミンモノパルミチン酸エステル、リグノセリルジエタノールアミンモノマルガリン酸エステル、リグノセリルジエタノールアミンモノステアリン酸エステル、リグノセリルジエタノールアミンモノアラキジン酸エステル、リグノセリルジエタノールアミンモノベヘン酸エステル、リグノセリルジエタノールアミンモノリグノセリン酸エステル、などが挙げられる。これらは、単独で用いても良く、2種以上を組み合わせて用いても良い。
を常圧よりも高くしておいた上で、一段発泡粒子をスチーム等で加熱して更に発泡させ、発泡倍率を高めることが可能である。以降、この発泡工程を「二段発泡工程」と呼び、得られたポリプロピレン系樹脂発泡粒子を「二段発泡粒子」と呼ぶ。
例えば、型内発泡成形体に吸音性や透水性を付与する為、敢えて空隙を有する型内発泡成形体を製造する場合があるが、このような場合は、円柱状、楕円状、直方体状、筒状(ストロー状)のポリプロピレン系樹脂発泡粒子が用いられる。
〔1〕 ポリプロピレン系樹脂発泡粒子により構成される、薄肉部を有する型内発泡成形体であって、
前記ポリプロピレン系樹脂発泡粒子が、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンを含有し、
かつ、前記脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計含有量が、ポリプロピレン系樹脂100重量部に対して0.1重量部以上5重量部以下であるポリプロピレン系樹脂組成物からなることを特徴とする、薄肉部を有する型内発泡成形体。
〔2〕 前記脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計重量を100重量%とした際、脂肪族ジエタノールアミン脂肪酸エステルの重量割合が5重量%以上95重量%以下であることを特徴とする、〔1〕に記載の型内発泡成形体。
〔3〕 前記脂肪族ジエタノールアミン脂肪酸エステルが一般式(1)で表される化合物であり、かつ、前記脂肪族ジエタノールアミンが一般式(2)で表される化合物であることを特徴とする、〔1〕あるいは〔2〕に記載の型内発泡成形体。
〔5〕 前記ポリプロピレン系樹脂組成物が、更に、脂肪族アルコールを、前記ポリプロピレン系樹脂100重量部に対して0.001重量部以上2重量部以下を含有するポリプロピレン系樹脂組成物であることを特徴とする、〔1〕~〔4〕の何れかに記載の型内発泡成形体。
〔6〕 前記脂肪族アルコールが一般式(3)で表される化合物であることを特徴とする、請求項5に記載の型内発泡成形体。
〔8〕 当該型内発泡成形体の少なくとも一部位の一組の対向する2面間において、一つの面上のある一点と、これに対向する他方の面との最短距離が、ポリプロピレン系樹脂発泡粒子の1個分以上2個分以下の距離である薄肉部を有することを特徴とする、〔1〕~〔7〕の何れかに記載の型内発泡成形体。
〔9〕 当該薄肉部を有する型内発泡成形体が、リブにより区画ごとに物品を収容することが可能な構造となっており、リブが薄肉部であることを特徴とする、〔1〕~〔8〕の何れかに記載の型内発泡成形体。
〔10〕ポリプロピレン系樹脂発泡粒子を金型に充填した後、加熱して型内発泡成形体を得る、薄肉部を有する型内発泡成形体の製造方法であって、
ポリプロピレン系樹脂発泡粒子が、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンを含有し、かつ、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計含有量が、ポリプロピレン系樹脂100重量部に対して0.1重量部以上5重量部以下であるポリプロピレン系樹脂組成物からなることを特徴とする、薄肉部を有する型内発泡成形体の製造方法。
〔11〕前記ポリプロピレン系樹脂組成物が、更に、脂肪族アルコールを、ポリプロピレン系樹脂100重量部に対して0.001重量部以上2重量部以下を含有するポリプロピレン系樹脂組成物であることを特徴とする、〔10〕に記載の薄肉部を有する型内発泡成形体の製造方法。
(1)ポリプロピレン系樹脂
●ポリプロピレン系樹脂A[株式会社プライムポリマー製、F227A]:融点143℃、エチレン含有率3.6重量%、MI7.0g/10分のエチレン/プロピレンランダム共重合体
●ポリプロピレン系樹脂B[株式会社プライムポリマー製、E314M]:融点145℃、エチレン含有率3重量%、ブテン-1含有量1.5重量%、MI5.0g/10分のエチレン/ブテン-1/プロピレンランダム共重合体
(2)脂肪族ジエタノールアミン脂肪酸エステル
●ステアリルジエタノールアミンモノステアリン酸エステル[花王株式会社製、エレクトロストリッパーTS-6B]
(3)脂肪族ジエタノールアミン
●ステアリルジエタノールアミン[東京化成工業株式会社製、試薬]
●ラウリルジエタノールアミン[和光純薬工業株式会社製、試薬]
(4)脂肪族アルコール
●ステアリルアルコール[和光純薬工業株式会社製、試薬]
●ラウリルアルコール[和光純薬工業株式会社製、試薬]
(5)上記以外の主たる添加剤
●N-ヒドロキシエチル-N-[2-ヒドロキシアルキル]アミン [ミヨシ油脂株式会社製、ダスパー125B]
●グリセリンステアリン酸エステル[理研ビタミン株式会社製、リケマールS-100]
(6)有機顔料
●ペリレンレッド[大日精化工業株式会社製]
(7)その他添加剤
●ポリエチレングリコール[ライオン株式会社製、PEG#300]
●タルク[林化成株式会社製、タルカンパウダーPK-S]
●メラミン(日産化学工業株式会社)
(8)発泡剤
●二酸化炭素[エア・ウォーター株式会社製]
●イソブタン[三井化学株式会社製]
また、実施例及び比較例における評価は、下記の方法で行った。
示差走査熱量計DSC[セイコーインスツルメンツ(株)製:DSC6200型]を用いて、ポリプロピレン系樹脂5~6mgを10℃/分の昇温速度で40℃から220℃まで昇温して融解させた後、10℃/分の降温速度で220℃から40℃まで降温して結晶化させ。次いで、再度10℃/分の昇温速度で40℃から220℃まで昇温した際に得られるDSC曲線の融解ピーク温度を融点として求めた。即ち、2回目の昇温時の融解ピーク温度を融点として求めた。
本実施例で得られたポリプロピレン系樹脂発泡粒子はほぼ球状であったことから、その直径をノギスで測定し、20粒の相加平均値をポリプロピレン系樹脂発泡粒子の平均粒子径とした。
嵩体積約50cm3のポリプロピレン系樹脂発泡粒子の重量w(g)およびエタノール水没体積v(cm3)を求め、発泡前のポリプロピレン系樹脂組成物の密度d(g/cm3)から次式により求めた。なお、ポリプロピレン系樹脂組成物の密度dは、0.9g/cm3であった。
(ポリプロピレン系樹脂発泡粒子の嵩密度)
広口の10L容器に、得られたポリプロピレン系樹脂発泡粒子を静かに、あふれるまで投入した後、ポリプロピレン系樹脂発泡粒子が10Lとなるよう、10L容器の口をすり切った。10L容器に入ったポリプロピレン系樹脂発泡粒子の重量を測定後、容積10Lで除し、嵩密度をg/Lの単位で表した。
示差走査熱量計DSC[セイコーインスツルメンツ(株)製:DSC6200型]を用いて、ポリプロピレン系樹脂発泡粒子5~6mgを10℃/分の昇温速度で40℃から220℃まで昇温してDSC曲線を得た。このDSC曲線は2つの融解ピークを示しており、低温側融点に基づく融解ピーク熱量をQl(J/g)、高温側融点に基づく融解ピーク熱量をQh(J/g)とし、高温側融点に基づく融解ピーク熱量の融解ピーク全体熱量に対する比率(Qh/(Ql+Qh))×100(%)によりDSC比を求めた。
ポリオレフィン発泡成形機P150N(東洋機械金属株式会社製)を用い、型内発泡成形により、図8に示すa面およびb面を有する1つのリブを有する箱型の型内発泡成形体を得た。但し、箱型形状外寸は縦200mm×横210mm×高さ150mmであり、厚みは全て均一で15mmである。a面およびb面を有するリブは箱型の型内発泡成形体底部の中央に位置し、リブ形状外寸は、縦50mm×横7mm×高さ120mmである。そして、このa面およびb面を有するリブを評価対象として、以降に記載する内容で評価した。
[表面凹凸]
a面およびb面を有するリブにおけるb面を目視観察し、次の基準で評価した。
○:ポリプロピレン径樹脂発泡粒子同士の粒間の開きが、ほとんど見られない。
△:ポリプロピレン径樹脂発泡粒子同士の粒間の開きが、少し見られる。
×:ポリプロピレン径樹脂発泡粒子同士の粒間の開きが、多数見られる。
a面およびb面の交差する稜線部分を目視観察し、次の基準で評価した。
○:稜線がシャープ、かつ、きれいな直線であり、金型転写性が良好であると共に、稜線部を指で5回擦ってもポリプロピレン系樹脂発泡粒子が剥離しない。
△:稜線が少し丸みを帯びており、小さな凹凸が見られるが、指で5回擦ってもポリプロピレン系樹脂発泡粒子が剥離しない。
×:稜線に明らかな凹凸が見られ、金型転写性が劣り、指で5回(以内)擦るとポリプロピレン系樹脂発泡粒子が剥離する。
[ポリプロピレン系樹脂粒子の作製]
表1または表2に示す種類、量のポリプロピレン系樹脂、添加剤、更には有機顔料ペリレンレッド0.01重量部を混合し、50mmφの単軸押出機を用いて、溶融混練(樹脂温度210℃)し、押出機先端からストランド状に押出した後、カッティングすることにより造粒し、ポリプロピレン系樹脂粒子(1.2mg/粒)を製造した。
但し、比較例7は、安定した押出しができず、溶融樹脂の吐出量が一定とならず、ポリプロピレン系樹脂粒子の重量が大きくばらついたため実施を中止した。
10L耐圧容器内に、水300重量部、得られたポリプロピレン系樹脂粒子100重量部、分散剤として第三リン酸カルシウム0.8重量部および、分散助剤としてノルマルパラフィンスルフォン酸ソーダ0.03重量部を仕込んだ。さらに、耐圧容器内に、表1または表2に示す種類、量の発泡剤を仕込み、撹拌下、表1または表2に示す発泡温度(容器内温度)および発泡圧力(容器内圧)で30分間保持した後、耐圧容器内を使用した発泡剤と同種の気体状物質で前記発泡圧力に保持しながら、耐圧容器の下部に設けた3mmφオリフィスを通して分散液を大気圧下に放出し、ほぼ球状の一段発泡粒子を得た。その後、75℃で24時間乾燥した。
[ポリプロピレン系樹脂型内発泡成形体の作製]
次に、得られた一段発泡粒子に内圧を付与することなく、図8に示す1つのリブを有する箱型の型内発泡成形体が得られる金型に充填し、水蒸気にて加熱、融着させ、型内発泡成形体を得、金型から取り出した。この際の、水蒸気圧力は、表1または表2の値とした(成形条件)。
リブ形状外寸が、縦50mm×横15mm×高さ120mmを有する金型を用いた以外は、比較例1と全く同様にして、リブ形状外寸が縦50mm×横15mm×高さ120mmである部位の表面美麗性を評価した。結果を、表2に示す。
[ポリプロピレン系樹脂粒子の作製]
表3または表4に示す種類、量のポリプロピレン系樹脂、添加剤、更には有機顔料ペリレンレッド0.01重量部を混合し、50mmφの押出機で混練(樹脂温度210℃)し、押出機先端からストランド状に押出した後、カッティングすることにより造粒し、ポリプロピレン系樹脂粒子(1.2mg/粒)を製造した。
10L耐圧容器に、水300重量部、得られたポリプロピレン系樹脂粒子100重量部、分散剤として第三リン酸カルシウム0.8重量部および分散助剤としてノルマルパラフィンスルフォン酸ソーダ0.03重量部を仕込んだ。さらに、耐圧容器内に、表3または表4に示す種類、量の発泡剤を仕込み、撹拌下、表3または表4に示す発泡温度(容器内温度)および発泡圧力(容器内圧)で30分間保持した後、耐圧容器内を使用した発泡剤と同種の気体状物質で前記発泡圧力に保持しながら耐圧容器の下部に設けた3mmφオリフィスを通して分散液を大気圧下に放出し、ほぼ球状の一段発泡粒子を得た。その後、75℃で24時間乾燥した。
次に、得られた二段発泡粒子を1m3の耐圧容器に仕込み、空気加圧して二段発泡粒子に常圧よりも高い内圧を付与した後、図8に示す1つのリブを有する箱型の型内発泡成形体が得られる金型に充填し、水蒸気にて加熱、融着させ、型内発泡成形体を得、金型から取り出した。この際の、発泡粒子内圧および水蒸気圧力は表3あるいは表4の値とした(成形条件)。金型から取り出した型内発泡成形体を70℃の乾燥器中で24時間乾燥、養生したのち、リブ形状外寸が縦50mm×横7mm×高さ120mmである薄肉部の表面美麗性を評価した。結果を、表3または表4に示す。
[ポリプロピレン系樹脂粒子の作製]
表5に示す種類、量のポリプロピレン系樹脂、添加剤、更には有機顔料ペリレンレッド0.01重量部を混合し、50mmφの押出機で混練(樹脂温度210℃)し、押出機先端からストランド状に押出した後、カッティングすることにより造粒し、ポリプロピレン系樹脂粒子(1.2mg/粒)を製造した。
10L耐圧容器に、水300重量部、得られたポリプロピレン系樹脂粒子100重量部、分散剤として第三リン酸カルシウム0.5重量部および分散助剤としてノルマルパラフィンスルフォン酸ソーダ0.02重量部を仕込み、撹拌下、表5に示す発泡温度(容器内温度)とし、さらに空気で加圧することにより、表5記載の発泡圧力(容器内圧)とした上で30分間保持し、含水させた後、耐圧容器内を空気で前記発泡圧力に保持しながら耐圧容器の下部に設けた3mmφオリフィスを通して分散液を圧力0.05MPa-Gの飽和水蒸気圧下に放出し、ほぼ球状の一段発泡粒子を得た。その後、75℃で24時間乾燥した。
次に、得られた二段発泡粒子を1m3の耐圧容器に仕込み、空気加圧して二段発泡粒子に常圧よりも高い内圧を付与した後、図8に示す1つのリブを有する箱型の型内発泡成形体が得られる金型に充填し、水蒸気にて加熱、融着させ、型内発泡成形体を得、金型から取り出した。この際の、発泡粒子内圧および水蒸気圧力は表5の値とした(成形条件)。金型から取り出した型内発泡成形体を70℃の乾燥器中で24時間乾燥、養生したのち、リブ形状外寸が縦50mm×横7mm×高さ120mmである薄肉部の表面美麗性を評価した。結果を、表5に示す。
[ポリプロピレン系樹脂粒子の作製]
表5に示す種類、量のポリプロピレン系樹脂、添加剤、更には有機顔料ペリレンレッド0.01重量部を混合し、50mmφの押出機で混練(樹脂温度210℃)し、押出機先端からストランド状に押出した後、カッティングすることにより造粒し、ポリプロピレン系樹脂粒子(1.2mg/粒)を製造した。
10L耐圧容器に、水300重量部、得られた樹脂粒子100重量部、分散剤として第三リン酸カルシウム1.2重量部および分散助剤としてノルマルパラフィンスルフォン酸ソーダ0.05重量部とを仕込み、さらに、イソブタンを15重量部仕込み、撹拌下、表5に示す発泡温度(容器内温度)および発泡圧力(容器内圧)で30分間保持したのち、耐圧容器内を窒素で前記発泡圧力に保持しながら耐圧容器の下部に設けた5mmφオリフィスを通して水系分散物を大気圧下に放出し、ほぼ球状の一段発泡粒子を得た。その後、75℃で24時間乾燥した。
[ポリプロピレン系樹脂型内発泡成形体の作製]
次に、得られた一段発泡粒子を1m3の耐圧容器に仕込み、空気加圧して一段発泡粒子に常圧よりも高い内圧を付与した後、図8に示す1つのリブを有する箱型の型内発泡成形体が得られる金型に充填し、水蒸気にて加熱、融着させ、型内発泡成形体を得、金型から取り出した。この際の、発泡粒子内圧および水蒸気圧力は表5の値とした(成形条件)。金型から取り出した型内発泡成形体を70℃の乾燥器中で24時間乾燥、養生したのち、リブ形状外寸が縦50mm×横7mm×高さ120mmである薄肉部の表面美麗性を評価した。
結果を、表5に示す。
Claims (11)
- ポリプロピレン系樹脂発泡粒子により構成される、薄肉部を有する型内発泡成形体であって、
前記ポリプロピレン系樹脂発泡粒子が、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンを含有し、
かつ、前記脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計含有量が、ポリプロピレン系樹脂100重量部に対して0.1重量部以上5重量部以下であるポリプロピレン系樹脂組成物からなることを特徴とする、薄肉部を有する型内発泡成形体。 - 前記脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計重量を100重量%とした際、脂肪族ジエタノールアミン脂肪酸エステルの重量割合が5重量%以上95重量%以下であることを特徴とする、請求項1記載の型内発泡成形体。
- 前記脂肪族ジエタノールアミン脂肪酸エステルがステアリルジエタノールアミンモノステアリン酸エステルであり、かつ、前記脂肪族ジエタノールアミンがステアリルジエタノールアミンであることを特徴とする、請求項3記載の型内発泡成形体。
- 前記ポリプロピレン系樹脂組成物が、更に、脂肪族アルコールを、前記ポリプロピレン系樹脂100重量部に対して0.001重量部以上2重量部以下含有するポリプロピレン系樹脂組成物であることを特徴とする、請求項1~4の何れか一項記載の型内発泡成形体。
- 当該型内発泡成形体の少なくとも一部位の一組の対向する2面間において、一つの面上のある一点と、これに対向する他方の面との最短距離が、ポリプロピレン系樹脂発泡粒子の1個分以上3個分以下の距離である薄肉部を有することを特徴とする、請求項1~6の何れか一項に記載の型内発泡成形体。
- 当該型内発泡成形体の少なくとも一部位の一組の対向する2面間において、一つの面上のある一点と、これに対向する他方の面との最短距離が、ポリプロピレン系樹脂発泡粒子の1個分以上2個分以下の距離である薄肉部を有することを特徴とする、請求項1~7の何れか一項に記載の型内発泡成形体。
- 当該薄肉部を有する型内発泡成形体が、リブにより区画ごとに物品を収容することが可能な構造となっており、リブが薄肉部であることを特徴とする、請求項1~8の何れか一項に記載の型内発泡成形体。
- ポリプロピレン系樹脂発泡粒子を金型に充填した後、加熱して型内発泡成形体を得る、薄肉部を有する型内発泡成形体の製造方法であって、
ポリプロピレン系樹脂発泡粒子が、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンを含有し、かつ、脂肪族ジエタノールアミン脂肪酸エステルおよび脂肪族ジエタノールアミンの合計含有量が、ポリプロピレン系樹脂100重量部に対して0.1重量部以上5重量部以下であるポリプロピレン系樹脂組成物からなることを特徴とする、薄肉部を有する型内発泡成形体の製造方法。 - 前記ポリプロピレン系樹脂組成物が、更に、脂肪族アルコールを、ポリプロピレン系樹脂100重量部に対して0.001重量部以上2重量部以下を含有するポリプロピレン系樹脂組成物であることを特徴とする、請求項10に記載の薄肉部を有する型内発泡成形体の製造方法。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3190150A4 (en) * | 2014-08-21 | 2018-01-24 | Kaneka Corporation | Conductive polypropylene-based foamed resin particles exhibiting excellent moldability and contamination resistance, method for producing polypropylene-based foamed resin particles, and polypropylene-based foamed resin molded body |
WO2022270425A1 (ja) * | 2021-06-25 | 2022-12-29 | 株式会社ジェイエスピー | ポリプロピレン系樹脂発泡粒子成形体及びその製造方法 |
JPWO2022270426A1 (ja) * | 2021-06-25 | 2022-12-29 | ||
WO2023277359A1 (ko) * | 2021-06-30 | 2023-01-05 | 롯데케미칼 주식회사 | 발포성 수지 조성물, 그 제조방법 및 이로부터 제조된 발포 성형체 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10882968B2 (en) * | 2016-08-30 | 2021-01-05 | Lcy Chemical Corporation | Polypropylene foams and processes of making |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0387245A (ja) * | 1989-06-07 | 1991-04-12 | Asahi Chem Ind Co Ltd | ポリオレフィン系樹脂型内薄肉成形体 |
JP2000007854A (ja) * | 1998-06-26 | 2000-01-11 | Kao Corp | 帯電防止性樹脂組成物 |
JP2000290421A (ja) * | 1999-04-09 | 2000-10-17 | Kanegafuchi Chem Ind Co Ltd | 帯電防止ポリオレフィン系樹脂予備発泡粒子およびその製造方法 |
JP2000296530A (ja) * | 1999-04-15 | 2000-10-24 | Daisen Kogyo:Kk | 型内発泡成形品 |
JP2001212840A (ja) * | 2000-02-03 | 2001-08-07 | Kanegafuchi Chem Ind Co Ltd | 型内発泡成形品及びその成形方法 |
JP2002146113A (ja) * | 2000-11-08 | 2002-05-22 | Grand Polymer Co Ltd | ポリオレフィン樹脂組成物およびそのフィルム |
JP2008106150A (ja) | 2006-10-25 | 2008-05-08 | Kaneka Corp | ポリプロピレン系樹脂予備発泡粒子、及び型内発泡成形体 |
JP2009256470A (ja) * | 2008-04-17 | 2009-11-05 | Kaneka Corp | ポリプロピレン系樹脂発泡粒子、型内発泡成形体および発泡粒子の製造方法 |
WO2013011951A1 (ja) * | 2011-07-15 | 2013-01-24 | 株式会社カネカ | 帯電防止性能を有する無架橋ポリエチレン系樹脂発泡粒子及び無架橋ポリエチレン系樹脂発泡成形体 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61113632A (ja) * | 1984-11-09 | 1986-05-31 | Idemitsu Petrochem Co Ltd | ポリプロピレン樹脂組成物 |
JPH0730489A (ja) | 1993-07-12 | 1995-01-31 | Yaskawa Electric Corp | 多回転テーブル |
JP3456758B2 (ja) | 1994-06-28 | 2003-10-14 | 鐘淵化学工業株式会社 | 帯電防止性を有するポリオレフィン系樹脂予備発泡粒子およびその製法 |
JPH0892408A (ja) | 1994-09-28 | 1996-04-09 | Mitsubishi Chem Basf Co Ltd | 帯電防止性を有するポリプロピレン系樹脂型内発泡成形体 |
JP3418075B2 (ja) | 1996-10-29 | 2003-06-16 | 三菱化学フォームプラスティック株式会社 | 発泡樹脂粒子の製造方法 |
JP5063835B2 (ja) | 2000-12-14 | 2012-10-31 | 三井・デュポンポリケミカル株式会社 | 農業用フイルム |
DE60224512T2 (de) | 2001-03-12 | 2008-05-21 | Idemitsu Kosan Co. Ltd. | Verfahren zur herstellung einer polyolefinharzzusammensetzung und einer polypropylenzusammensetzung |
CN1237100C (zh) * | 2001-09-28 | 2006-01-18 | 钟渊化学工业株式会社 | 聚丙烯系树脂预发泡粒子、及由其形成的模内发泡成型制品 |
JP3943947B2 (ja) | 2002-02-08 | 2007-07-11 | 株式会社ジェイエスピー | 帯電防止ポリエステル系樹脂発泡粒子及びその成形体 |
CN101061163B (zh) * | 2004-11-22 | 2012-12-05 | 钟渊化学工业株式会社 | 聚丙烯系树脂预发泡粒子和模内发泡成形体 |
CN101679663B (zh) | 2007-06-22 | 2012-07-18 | 钟渊化学工业株式会社 | 具有防静电性能的聚烯烃系树脂预发泡粒子以及由其得到的成形体 |
JP5107692B2 (ja) | 2007-12-17 | 2012-12-26 | 株式会社ジェイエスピー | ポリプロピレン系樹脂発泡粒子、及びその発泡粒子成形体 |
US20090169895A1 (en) | 2007-12-27 | 2009-07-02 | Jsp Corporation | Foamed polyolefin resin beads |
JP5525847B2 (ja) * | 2009-03-17 | 2014-06-18 | 日本ポリプロ株式会社 | プロピレン系多層シートおよびそれを用いた加圧処理用包装袋 |
-
2013
- 2013-03-13 US US14/384,617 patent/US9611369B2/en active Active
- 2013-03-13 JP JP2014504974A patent/JP5976097B2/ja active Active
- 2013-03-13 CN CN201380014065.5A patent/CN104169345B/zh active Active
- 2013-03-13 WO PCT/JP2013/057073 patent/WO2013137344A1/ja active Application Filing
- 2013-03-13 MY MYPI2014002597A patent/MY164635A/en unknown
- 2013-03-13 EP EP13761965.6A patent/EP2826812B1/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0387245A (ja) * | 1989-06-07 | 1991-04-12 | Asahi Chem Ind Co Ltd | ポリオレフィン系樹脂型内薄肉成形体 |
JP2000007854A (ja) * | 1998-06-26 | 2000-01-11 | Kao Corp | 帯電防止性樹脂組成物 |
JP2000290421A (ja) * | 1999-04-09 | 2000-10-17 | Kanegafuchi Chem Ind Co Ltd | 帯電防止ポリオレフィン系樹脂予備発泡粒子およびその製造方法 |
JP2000296530A (ja) * | 1999-04-15 | 2000-10-24 | Daisen Kogyo:Kk | 型内発泡成形品 |
JP2001212840A (ja) * | 2000-02-03 | 2001-08-07 | Kanegafuchi Chem Ind Co Ltd | 型内発泡成形品及びその成形方法 |
JP2002146113A (ja) * | 2000-11-08 | 2002-05-22 | Grand Polymer Co Ltd | ポリオレフィン樹脂組成物およびそのフィルム |
JP2008106150A (ja) | 2006-10-25 | 2008-05-08 | Kaneka Corp | ポリプロピレン系樹脂予備発泡粒子、及び型内発泡成形体 |
JP2009256470A (ja) * | 2008-04-17 | 2009-11-05 | Kaneka Corp | ポリプロピレン系樹脂発泡粒子、型内発泡成形体および発泡粒子の製造方法 |
WO2013011951A1 (ja) * | 2011-07-15 | 2013-01-24 | 株式会社カネカ | 帯電防止性能を有する無架橋ポリエチレン系樹脂発泡粒子及び無架橋ポリエチレン系樹脂発泡成形体 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2826812A4 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3190150A4 (en) * | 2014-08-21 | 2018-01-24 | Kaneka Corporation | Conductive polypropylene-based foamed resin particles exhibiting excellent moldability and contamination resistance, method for producing polypropylene-based foamed resin particles, and polypropylene-based foamed resin molded body |
WO2022270425A1 (ja) * | 2021-06-25 | 2022-12-29 | 株式会社ジェイエスピー | ポリプロピレン系樹脂発泡粒子成形体及びその製造方法 |
JPWO2022270426A1 (ja) * | 2021-06-25 | 2022-12-29 | ||
JPWO2022270425A1 (ja) * | 2021-06-25 | 2022-12-29 | ||
WO2022270426A1 (ja) * | 2021-06-25 | 2022-12-29 | 株式会社ジェイエスピー | ポリプロピレン系樹脂発泡粒子、その製造方法、及びポリプロピレン系樹脂発泡粒子成形体 |
JP7299555B2 (ja) | 2021-06-25 | 2023-06-28 | 株式会社ジェイエスピー | ポリプロピレン系樹脂発泡粒子成形体及びその製造方法 |
JP7323852B2 (ja) | 2021-06-25 | 2023-08-09 | 株式会社ジェイエスピー | ポリプロピレン系樹脂発泡粒子、その製造方法、及びポリプロピレン系樹脂発泡粒子成形体 |
WO2023277359A1 (ko) * | 2021-06-30 | 2023-01-05 | 롯데케미칼 주식회사 | 발포성 수지 조성물, 그 제조방법 및 이로부터 제조된 발포 성형체 |
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