TW201219468A - Expandable polystyrene resin bead and producing method thereof, polystyrene resin preliminary expanded bead, polystyrene resin foam and producing method thereof, heat insulating material and cushioning material - Google Patents

Abstract

This expandable polystyrene resin bead contains expanding agent therein, and has the cell structure of a expanded bead when the resin bead is heated and expanded with a volume expanding multiple of 50 times, the cell structure in which an inside average cell diameter is within a range of 35-140 p.m, a value of an outer layer average cell diameter divided by the inside average cell diameter is within a range of 0.80-1.20, and a interconnection cells rate is lower than 10 percent.

Description

[Technical Field] The present invention relates to a polystyrene-based resin foam molded body which is excellent in mechanical strength, heat insulation and cushioning properties such as bending strength, compressive strength and impact resistance. And an expandable polystyrene-based resin particle used in the production of the above-mentioned polystyrene-based resin foam molded article. This patent application claims Japanese Patent Application No. 2010-221061, filed on September 30, 2010 in Japan, and Japanese Patent Application No. 2010-221062, filed on September 30, 2010 in Japan, and September 30, 2010. Japanese Patent Application No. 2010-221063, the priority of which is hereby incorporated by reference. [Prior Art] The polystyrene-based resin foam molded article obtained by foam molding the expandable polystyrene resin particles is excellent in chemical compressibility, light weight, heat insulating properties, cushioning properties, economy, and the like. The polystyrene-based resin foam molded article is widely used as a heat-insulating material for food, a heat insulating material for a house, a heat insulating material such as a cold-insulation box, a buffer material for conveyance, and a cushioning material such as an impact-absorbing material for contact between members. As one of the methods for producing the expandable polystyrene resin particles, a so-called melt extrusion method is known. In the melt extrusion method, a foaming agent is added to a polystyrene-based resin melted in an extruder and kneaded, and a molten resin containing a foaming agent is directly applied to a cooling liquid from a small hole attached to a die at the tip of the extruder. In the middle of extrusion, the extrudate was cut with a high-speed rotary knife, and the extrudate was cooled and solidified by contact with a liquid for cooling, whereby foaming property 323480 201219468 polystyrene resin particles was produced. Conventionally, a method for producing expandable polystyrene resin particles by a melt extrusion method has been proposed, for example, in the documents disclosed in Patent Documents 丨 to 3. Patent Document 1 discloses an extrusion-type manufacturing method of foamable particles formed of a non-orthogonal and stress-free thermoplastic styrene polymer, which has (a) a foaming agent compounded in a polymer The glass transition temperature of the foamable polymer (hereinafter referred to as 'Tg) is higher than the temperature of the water bath or fluid, the step of extrusion by the die, and (b) the Tg retained by the expandable polymer In the high temperature water bath or fluid bath, the step of cutting the polymer at the exit of the die to form granules, and (c) cooling the granules at a temperature below the Tg value of the foamable polymer. The extrusion manufacturing method in the above successive steps, the cooling of the particles is slowly cooled from Tg + 5 ° C to Tg - 5 ° C at least at a cooling rate slower than 3 ° C per minute, and the polymer particles are cut off. The cooling of the granules is carried out at a pressure of 2 bar or more. Patent Document 2 discloses a method for producing foamable thermoplastic resin particles by kneading a thermoplastic resin and a foaming agent, and then ejecting holes from the die at a Tg+5 C or higher of the foamable thermoplastic resin particles. The mixture was extruded in a heating and pressurizing liquid, and then the obtained particles were cut in a heated and pressurized liquid, kept at the same temperature or higher, and the residual stress in the particles was relaxed, followed by cooling. Patent Document 3 discloses a method for producing foamable thermoplastic resin particles, which comprises the steps of: kneading a thermoplastic resin (A) and a foaming agent (β) by kneading (step 1); and obtaining the melt kneaded material from The extrusion hole of the die is extruded in a heating/pressurizing solution which is heated/pressurized in a temperature/pressure in which the melted kneaded material of the thermoplastic resin (Α) and the foaming agent (Β) is not foamed 5 323480 201219468 Thereafter, the step of cutting (step 2), the obtained particles (foaming thermoplastic resin) are cooled to a temperature at which no foaming is carried out at normal pressure (step 3); and a differential thermal analysis device is used ( DSC) When measuring the foamable thermoplastic resin, the peak temperature on the low temperature side is heated as the temperature range of 30 to (T1 + 15) °C at T1 in the two endothermic peaks occurring in the region of 4 Torr to 120 °C. The step of subjecting the particles to a ripening treatment in a liquid at normal pressure (step 4). [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. [Problem to be Solved by the Invention] However, in the production method of Patent Document 1, when the resin extruded from the die is cut and pelletized, it is maintained at a value above the foamable polymer. The high-temperature heating and pressurizing liquid causes the above-described extrusion and cutting, so that the obtained particles are easily fused, and a plurality of particles are bonded to each other, and the occurrence rate of the block-shaped defective product is high. In the production method of Patent Document 2, the particles obtained by the subsequent cutting are held in a heating and pressurizing liquid at a temperature of Tg + 5t: or more to relax the residual stress in the particles, and then cooled to produce a foamable thermoplastic resin. particle. When the foamable thermoplastic resin particles are produced under the production conditions described in the examples of Patent Document 2, the particles obtained by the cutting are easily fused to each other, and 6 323480 .201219468 a plurality of particles are bonded to each other to form a block. The hair (four) is high. Further, the hair polyphenylene (10)-based dendritic obtained by the production method is heated, and the average bubble diameter of the preliminary expanded particles obtained at the time of preliminary foaming is likely to be increased. When the average cell diameter is large, the mechanical strength of the foamed molded article obtained by performing the in-mold expansion molding of the preliminary expanded particles is lowered, the heat conductivity is increased, and the heat insulating performance is deteriorated. The manufacturing method of Patent Document 3 is a method for obtaining preliminary expanded particles having a large particle diameter (bubble diameter). However, if the particle diameter of the preliminary foamed particle structure is large, the mechanical strength of the foamed molded article obtained by the foaming of the preliminary expanded particles in the mold may be lowered, the thermal conductivity may be increased, and the heat insulating property may be deteriorated. . In view of the above, the present invention provides a polystyrene-based resin foam molded article excellent in mechanical strength, heat insulating property, and cushioning property, a method for producing the same, and a foamable polystyrene resin particle used in the production. And its manufacturing method for the purpose. [Means for Solving the Problem] According to the first aspect of the present invention, the expandable polystyrene resin particles are resin particles containing a foaming agent in the polystyrene resin particles, and the resin particles are heated and foamed. The foamed particulate enthalpy having a volume expansion ratio of 50 times has an internal average bubble diameter in the range of 35 to 14 Å/m, and the average bubble diameter/internal average bubble diameter in the surface layer is 〇. 8〇 to 丨.2 bubble structure within the range of 〇 and continuous bubble rate below 10%. In this case, when the foaming volume is multiplied by X times, the intrinsic average bubble diameter IV of the expanded particles is expressed by the following formula (1) (wherein, 仏 is expressed as a volume of 7 323480 201219468, and the expansion ratio is 50 times. The internal average cell diameter (/zm) of the bubble particles, D!' indicates the internal average cell diameter (#m) of the expanded particles when foamed to a volume expansion factor of X, and is converted into a volume expansion ratio of 50 times. It is preferable that the internal average bubble diameter Di of the expanded particles satisfies the relationship of 35 Å m S Di S 140 # m. [Number 1]

Dx=3^xD\ ···(!) Further, the above internal average cell diameter is preferably in the range of 40 to 120/zm. Further, the continuous cell ratio is preferably 8% or less. The range of the average of the surface of the surface layer is preferably in the range of 0.90 to 1.10. Further, the inorganic bubble nucleating agent is preferably contained in an amount of 5.0 parts by mass or less based on 100 parts by mass of the polystyrene resin. Further, the inorganic bubble nucleating agent is preferably talc. According to a second aspect of the present invention, in the method of producing a foamable polystyrene resin particle, a foaming agent is added to a polystyrene resin and kneaded in a resin supply device, and a foaming agent is contained. The molten resin is extruded from a small hole of a mold provided at the tip end of the resin supply device at a temperature lower than the glass transition temperature Tg of the expandable polystyrene resin particles, and is extruded while being extruded. The extrudate is cut, and the extrudate is cooled and solidified by contact with a cooling liquid to obtain a foamable polystyrene resin particle; and the obtained expandable polystyrene resin particle is obtained. The foaming polystyrene resin particles are heated at a glass transition temperature Tg-5) °C or higher to obtain the above-mentioned expandable polystyrene resin particles 8 323480 .201219468. At this time, the temperature of the cooling liquid at the time of cutting the extrudate is in the range of 20 to 60 °C.无机 曰 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Further, the above inorganic bubble nucleating agent is preferably talc. Addition: preliminarily foaming the polystyrene resin obtained by foaming the above-mentioned expandable polystyrene resin particles: hot-shot pre-inflation foam: sub-filling the above-mentioned polystyrene-ester preparation foaming granules According to the third aspect of the present invention, the polystyrene-based resin particles are obtained by heating a resin containing a ruthenium-cured foam molding system. The foamed polystyrene molding die is heated in a mold cavity, and the mold particles are filled in the above-described expandable polystyrene-based, 2-shaped shape, and have an internal average bubble diameter of 35 to just _ In the inner layer, the average bubble permeation/internal average bubble: =0, to the bubble structure in the range of L2 且 and the continuous bubble rate is below 〇 〇 %. In the case of 2, the foaming is _expansion times of the preliminary foaming granules = the bubble diameter Μ is expressed by the following formula (2) (wherein, the internal average enthalpy of the expanded particles is 5 times the volume expansion ratio 323480 201219468 D 2 'is the inside of the pre-expanded particles converted into the volume expansion ratio of the foamed particles at the X-fold expansion of the volume expansion ratio of the foamed particles (V m) The average bubble diameter (four) is good for satisfying the relationship of the heart "(10)". [Number 2]

Further, the above internal average bubble diameter is preferably in the range of 4 Å to 12 Å #m. Further, the above continuous cell ratio is preferably 8% or less. The range of the average of the surface of the surface layer is preferably in the range of 0.90 to 1. 1 inch. Further, the inorganic bubble nucleating agent is preferably contained in an amount of not less than 5% by mass based on the mass parts by mass of the polystyrene resin. Further, the inorganic bubble nucleating agent is preferably talc. According to the fourth aspect of the present invention, the polystyrene pure fat foamed molded body #' is filled with polystyrene & olefin resin foaming particles in a cavity of a forming mold, and the forming mold is subjected to steam heating to carry out In the state in which the foam is molded in the mold and the foaming molding is performed at the time of the foaming multiple X times, the internal average bubble diameter 发泡 of the foamed particles which are mutually fused in the molded body is as follows (3) (In the formula, & represents the internal average cell diameter Um of the expanded particles in the foamed molded article which is converted to a foaming ratio of 5 times), and IV represents foaming when foamed into a foaming multiple of X times. The internal average gas diameter of the expanded particles in the foamed molded body in which the enthalpy is converted into a foaming ratio of 5 〇 times in the molded body satisfies the relationship of 35/zn^D3S14G"m, 10 323480 201219468 The value of the average cell diameter/internal average cell diameter in the surface layer of the particle • The bubble structure in (4) of i h2G and the continuous cell ratio of the foamed molded article is 10% or less. [Number 3]

A xD\ 50 (3)

X According to the fifth aspect of the present invention, it is formed by the above-mentioned polystyrene resin foam molded body. According to the sixth aspect of the invention, the cushioning material is formed of the above-mentioned polystyrene-based resin foam molded body. According to a seventh aspect of the present invention, a method for producing a polystyrene material or a resin foam molded body comprises: adding a foaming agent to a polystyrene tree month a in a resin supply device, and kneading the mixture; The molten resin of the foaming agent is extruded from a small hole of a film device provided at the tip end of the resin supply device at a temperature at which the glass transition temperature Tg of the expandable polystyrene resin particles is not reached. The extrudate is cut off, and the extrudate is cooled and solidified by contact with a cooling liquid to obtain a first step of the expandable polystyrene resin particles; and the obtained expandable polystyrene is obtained. The resin is heated at a temperature equal to or higher than the glass transition temperature Tg-5 of the expandable polystyrene resin particles at a temperature equal to or higher than ° C. The second step of obtaining the expandable polystyrene resin particles; The polystyrene-based resin particles are heated to produce an inner average cell diameter D2 of the preliminary expanded particles having a volume expansion ratio of 50 times in terms of the above formula (2) in the range of 35 to 140/zm, and the average cell diameter in the surface layer portion. /The value of the internal average bubble diameter is 0. The third step of preparing the expanded particles of the polystyrene resin in the bubble structure of 10% or less in the range of 80 to 1.20 and 11 323480 201219468 ==; and, then, preparing the above polystyrene resin The foamed particles are filled in a cavity of a molding die and heated to carry out a fourth step of die and internal foam molding. In this case, the cooling liquid for the above extrudate is in the range of 20 to 6 (TC). X is better than the polystyrene (10) f parts, and it is preferable to add the inorganic bubbles below 5 ΐ. Further, the above inorganic bubble nucleating agent is preferably talc powder. Preparation 2 = = polystyrene phenyl ester pre-foaming molding, to obtain heat insulation material in the gutter and heating, to prepare the mold, the step, The above polystyrene resin can be pre-expanded to obtain a cushioning material. Gossip [Effects of the Invention] According to the present invention, the foaming polystyrene tree is a volume expansion ratio of 50 俾 扒 &#工& @ The path is in the range of 35 to UM m. It has an internal average bubble and an average bubble diameter/internal average bubble control in the inner layer. The value is in the range of 〇80 to 12〇 and the continuous bubble rate is (4) The following bubbles are formed. Therefore, 'the whole of the foamed particles is formed into a relatively small diterpene fluoride/package, and the foamed particles are foam molded in the mold to obtain the sound-spinning strength, compressive strength, and Excellent mechanical strength, heat insulation and cushioning properties such as impact resistance. 323480 12 201219468 According to this issue The method for producing the foamable polystyrene resin particles is a foaming polystyrene resin particle obtained by a melt extrusion method (the glass transition temperature Tg_5 of the foamable polystyrene resin particle) A method of obtaining foamable polystyrene-based resin particles by heating at a temperature of C or higher. Therefore, when the obtained expandable polystyrene-based resin particles are heated and foamed, the formation of the entire expanded foam particles is relatively small. Uniform independent bubble. The foamed particles are foamed and formed in a mold, and the foam molding can be efficiently produced for manufacturing mechanical strength, heat insulation and cushioning properties such as bending strength, compressive strength and impact resistance. The foamable polystyrene resin particle 0 according to the present invention has a state in which the polystyrene resin foam molding system has a foaming multiple X times foam molding, and the foam molded body is fused to each other. The internal average cell diameter IV of the foamed particles is 50 times as large as the foaming ratio in the foamed molded article in the above formula (3), and the internal average cell diameter D3 of the expanded particles satisfies the relationship of 35/zmSD3S140/zm. grain The average bubble diameter/internal average bubble diameter of the surface layer of the sub-layer is in the range of 〇. 8〇 to 1.20, and the bubble structure of the foamed molded body is less than 1% by volume. Therefore, throughout the foaming The entire molded body forms a relatively small uniform bubble, and the mechanical strength, heat insulation and cushioning property of the test piece strength, compressive strength, and impact resistance are superior. The expandable polystyrene resin particles of the present invention are foamed polystyrene resin particles containing a foaming agent in the polystyrene resin particles 323480 13 201219468 In the state of expanded foam which is foamed to a volume expansion ratio of 50 times, the internal average bubble diameter is in the range of 35 to 140/zm, and the average bubble diameter/internal average bubble diameter of the surface layer is at 0. A bubble structure having a range of 80 to 1.20 and an open cell ratio of 10% or less. In addition, the volume expansion ratio of the expanded particles is a volume expansion ratio measured by a method for measuring the volume expansion ratio of the polystyrene resin-prepared foam particles to be described later. In the foamable polystyrene resin particles of the present invention, when the volume expansion ratio of the foamed expanded beads is 50 times or more, the internal average cell diameter Eh' of the expanded particles is expressed by the above formula (1). The internal average bubble diameter Di satisfies the relationship of 35//inSD1S140//in in terms of a volume expansion ratio of 50 times. The polystyrene resin preliminarily foamed particles and the polystyrene resin foam molded article according to the present invention have the same bubble structure. The foamable polystyrene resin particles of the present invention are heated to a state in which foaming is 50 times the volume expansion ratio, and the internal average cell diameter is in the range of 35 to 140 / / m, preferably 40 to Within the range of 120/zm. When the internal average cell diameter is less than 35/m, the polystyrene resin foam molded article obtained by in-mold foam molding is formed, and since the continuous cell ratio is increased, the closed cells are reduced, and thus the bending strength and the compressive strength are obtained. , mechanical strength such as impact resistance is reduced. When the internal average cell diameter exceeds 140/zm, the mechanical strength such as bending strength, compressive strength, and impact resistance is lowered.至1. The value of the average bubble diameter / the internal average bubble diameter of the surface layer is 0. 80 to 1. The foamed polystyrene resin of the present invention is foamed to a foaming particle size of 50 times. Within the range of 20, preferably in the range of 0.940 14 323480 201219468 to 1.10. When the outer layer diameter of the surface layer portion and the inner average bubble are pinched, when the mold is out of the above range, the mold (four) is formed into a foamed shape, and the mechanical strength such as bending strength and impact resistance of the polystyrene-based resin foam molded body is lowered. . In addition, the "average cell diameter of the surface layer portion" of the present invention refers to a state in which the foamable polystyrene (tetra) resin particles are foamed to a volume expansion ratio of 50 times, and the foamed particles are cut through the center. The section of the broken section is defined as the "surface layer portion" from the depth of the surface of the expanded particle to 1/4 of the diameter of the expanded particle, and the average bubble diameter of the bubble portion is present in the surface portion. Further, the "internal average bubble diameter" means a region deeper than the surface layer portion of the same foamed particle (the region on the center side) is defined as "inside", and the average bubble diameter of the bubble inside the inside. The foamable polystyrene resin particles of the present invention are foamed to a foamed particle size of 50 times the volume expansion ratio, and the continuous cell ratio is preferably 1% or less, preferably 8% or less. When the continuous cell ratio exceeds 1% by weight, the mechanical strength such as bending strength, compressive strength, and impact resistance of the polyphenylene resin or the resin foam molded body obtained by the in-mold expansion molding is lowered. In the expandable polystyrene resin particles of the present invention, the polystyrene resin is not particularly limited, and examples thereof include styrene, melamine, r, ethylene, chlorostyrene, and B. A single polymer of a styrene monomer such as styrene, isopropyl benzene, benzyl benzene, or vinyl ethylene, or a copolymer of the same. Further, it is preferable to use a polystyrene-based resin containing 5 g% by mass or more of styrene, and more preferably polystyrene. Further, the polystyrene-based resin may be a styrene-based monomer having the styrene monomer as a main-working slab and a vinyl monomer copolymerizable with the styrene-based 323480 15 201219468. Copolymer. Examples of the vinyl monomer include (mercapto) decyl acrylate, (mercapto) acrylate, (mercapto) butyl acrylate, and hexadecyl (meth) acrylate (methyl). Alkyl acrylate; (meth)acrylonitrile, dinonyl maleate, dinonyl fumarate, diethyl fumarate, ethyl fumarate, divinylbenzene, dialkyl acrylate A difunctional monomer such as a glycol ester. Further, as long as the main component is a polystyrene resin, other resins may be added. As the added resin, for example, for improving the impact resistance of the foamed molded body, for example, a polybutadiene, a styrene-butadiene copolymer, an ethylene-propylene-nonconjugated diene three-dimensional copolymer may be mentioned. A rubber-modified polystyrene resin such as a diene rubber-like polymer, so-called high impact polystyrene. Further, for example, a polyethylene resin, a polypropylene resin, an acrylic resin, an acrylonitrile-styrene copolymer, an acrylonitrile-butadiene-styrene copolymer, or the like can be given. A polystyrene-based resin which is a non-recycled raw material such as a polystyrene-based resin which is re-produced by a suspension polymerization method or the like, which is a commercially available polystyrene-based resin, can be used. In the case of using polystyrene), it is also possible to use a recycled raw material obtained by subjecting a used polystyrene-based resin foam molded body to a recycling treatment. The recycled raw material is recovered from a polystyrene-based resin foam molded body, for example, a fish tank, a home appliance cushioning material, a food packaging tray, etc., and the recycled raw material is reused by a limonene dissolution method or a heating volume reduction method. A raw material having a mass average molecular weight Mw in the range of 120,000 to 400,000 is appropriately selected, and a plurality of recycled raw materials having different mass average molecular weights Mw may be appropriately used in combination. 16 323480 .201219468 The foaming agent used in the expandable polystyrene resin particles of the present invention is not particularly limited. For example, aliphatic hydrocarbons such as propane, n-butane, isobutane, n-pentane, isopentane, neopentane, and cyclopentane; ethers such as dioxane and diethyl ether; and various alcohols such as methanol and ethanol can be used. Carbonic acid gas, nitrogen gas, water, and the like. Among them, aliphatic hydrocarbons are preferred. Further, it is more preferably n-butane, isobutane, n-pentane, isopentane alone or a mixture thereof. Further, n-pentane, isopentane, neopentane, cyclopentane, cyclopentadiene, or a mixture of these, which is a hydrocarbon having 5 carbon atoms, is preferred. Among them, a mixture of isopentane and n-pentane or a mixture of the two is preferred. Further, a foaming agent containing a hydrocarbon having 5 carbon atoms as a main component and a hydrocarbon having a boiling point of 20 ° C or higher and a carbon number of 5 (for example, n-butyl, isobutyl, hexane, carbonic acid, etc.) is also included. ). The amount of the foaming agent added is preferably in the range of 2 to 15 parts by mass, more preferably in the range of 3 to 8 parts by mass, particularly preferably in the range of 4 to 7 parts by mass, based on 100 parts by mass of the polystyrene resin. . In the foamable polystyrene resin particles, inorganic fine particles such as talc powder, calcium silicate, synthetic or naturally occurring cerium oxide are preferably added as a nucleating agent for 100 parts by mass of the polystyrene resin. Powder (inorganic bubble nucleating agent) or chemical blowing agent. The bubble nucleating agent is preferably talc. 0质量的范围范围。 The amount of the above-mentioned nucleating agent is preferably in the range of from 0.05 to 2.0 parts by mass. Examples of the above chemical foaming agent include azodicarbonamicle, N, Ν'-dinitrosopentamethylenetetramine, and 4,4'-oxybis(phenylsulfonylhydrazine). ), sodium bicarbonate, and the like. In addition, the above-mentioned bubble nucleating agent is a masterbatch type nucleating agent which uses an inorganic powder such as talc or a base material, preferably a masterbatch of a base resin, preferably a polystyrene resin. Preferably. When the polystyrene-based resin is mixed with the bubble nucleating agent in the resin supply device by using the masterbatch type nucleating agent, the inorganic powder or the chemical foaming agent can be dispersed in the polystyrene resin to be very uniform. status. In addition to the above-mentioned foaming agent and bubble nucleating agent, the expandable polystyrene resin particles of the present invention are in the range of physical properties of the foamable polystyrene resin particles and the foamed molded article obtained without damaging Additives such as a binder preventive agent, a bubble regulator, a crosslinking agent, a filler, a flame retardant, a flame retardant aid, a lubricant, and a colorant may be added. The expandable polystyrene resin particles of the present invention are in the state of expanded foam which is foamed to a volume expansion ratio of 50 times, and have an internal average cell diameter of 35 to 140 / im, and an average cell diameter of the surface layer portion / The bubble structure in which the value of the internal average bubble diameter is in the range of 0.80 to 1.20 and the continuous cell ratio is 1% or less. Therefore, the foamed molded body obtained by foam molding the foamed particles in the entire mold is formed into a relatively small uniform bubble throughout the entire expanded foam, and is mechanical strength such as bending strength, compressive strength, and impact resistance. Excellent heat and cushioning. (Manufacturing Method of Foaming Polystyrene Resin Particles) Next, the manufacturing method of the expandable polystyrene resin particles of the present invention will be described with reference to the drawings. The method for producing the expandable polystyrene resin particles of the present invention comprises: adding a foaming agent to a polystyrene resin in a resin supply device and kneading the resin, and dissolving the molten resin containing the foaming agent from the resin Supply device 323480 18 201219468 The small hole of the mold at the tip end is extruded in a cooling liquid that does not reach the glass transition temperature Tg of the expandable polystyrene resin particles, and the extrudate is cut while being extruded. 'The granulation step of obtaining the expandable polystyrene-based resin particles by bringing the extrudate into contact with the cooling liquid to be cooled and solidified; and obtaining the foamable polystyrene-based resin in (expandable polystyrene) The glass transition temperature Tg-5) of the resin particles is heated at a temperature of ° C or higher to obtain a reheating step of the expandable polystyrene resin particles of the present invention. (granulation step) Fig. 1 is a configuration diagram showing an example of a production apparatus for producing foamable polystyrene resin particles in the above granulation step. The manufacturing apparatus of this example is provided with an extruder 1 as a resin supply device, a die 2 having a plurality of small holes attached to the front end of the extruder 1, and a raw material supply such as a raw material for the tree in the extruder 1. a hopper 3; a high-pressure pump 4 that presses a foaming agent into the molten resin in the extruder 1 through a blowing agent supply port 5; so that the resin discharge surface of the mold 2 through which the small holes are formed is in contact with the cooling water In a manner of setting, and circulating a cooling chamber γ in a room; a rotatable cutter 6 which is cut in a cutting chamber 7 and which can be extruded from a small hole of the mold 2; The foamable resin particles conveyed by the flow of the cooling water are separated from the cooling water and dehydrated and dried to obtain a dehydration dryer 10 having a solid-liquid separation function of the expandable resin particles; The dewatering dryer 1 〇 the separated cooling water is stored in the water tank 8; the cooling water in the water tank 8 is sent to the squeezing pump 9 of the cutting chamber 7; and the dehydration dryer 1 with the solid-liquid separation function is dehydrated The storage container 11 in which the dried foamable resin particles are stored is constituted19 323480 201219468 Further, as the extruder 1, any one of an extruder using a screw or an extruder not using a screw may be employed. Examples of the extruder using the screw include a single-shaft extruder, a multi-axis extruder, a bending extruder, a tandem extruder, and the like. Examples of the extruder that does not use a screw include a piston extruder, a gear pump, and the like. A static mixer can be used with any extruder. Among these extruders, from the viewpoint of productivity, an extruder using a screw is preferred. Further, the cutting chamber 7 accommodating the cutter 6 can also be used in a conventional method for use in a granulation method in which a resin is melted and broadcasted. By using the manufacturing apparatus shown in Fig. 1 to produce expandable polystyrene resin particles, the desired additives such as a polystyrene resin, a bubble nucleating agent, and a flame retardant added as necessary are first prepared from the raw materials. The supply hopper 3 is put into the extruder 1. The polystyrene resin of the raw material may be in the form of a tablet or a granule, and may be sufficiently mixed beforehand, and may be supplied from one raw material supply hopper, or may be used in a plurality of raw materials, for example, when a plurality of batches are used. The feed hopper is charged with raw materials and mixed in an extruder. Further, when a plurality of batches of the recovered raw materials are used in combination, it is preferred to thoroughly mix the raw materials of the plurality of batches beforehand, and remove the foreign matter by a suitable screening method such as magnetic gas screening, over-twisting, specific gravity screening, and air filtration. After the polystyrene resin, the bubble nucleating agent, and any other additives are supplied into the extruder 1, the resin is heated and melted, and the molten resin is transferred to the mold 2 while being supplied from the foaming agent supply port 5 by the high pressure pump. 4 The blowing agent is pressed in, and the blowing agent is mixed in the molten resin. The tweezers are removed by the foreign matter provided in the extruder 1 as necessary, and the molten material is moved to the front end side of 20 323480 .201219468 while kneading, and the melted material added with the foaming agent is placed at the end of the extruder 1 The small holes of the mold 2 are extruded. The resin discharge surface of the mold 2 through which the small holes are formed is disposed in the cutting chamber 7 in which the cooling water is supplied indoors. Further, the cutting chamber 7 is provided with a rotatable cutter which cuts the resin extruded from the small hole of the mold 2, and the molten material added with the foaming agent is supplied from the mold provided at the front end of the extruder 1. When the small hole is extruded, the melt is cut into pellets by the cutter 6, and is cooled rapidly by contact with the cooling water to obtain the expandable polystyrene obtained by the expandable polystyrene resin pellet. The resin particles are transported from the cutting chamber 7 along with the flow of the cooling water to the dehydration dryer 1 to which the solid-liquid separation function is attached. The expandable polystyrene resin particles are dehydrated and dried while being separated from the cooling water by a dehydration dry machine 1 with a solid-liquid separation function. The dried hair and the encapsulated polyethylene resin particles are stored in the storage container 11. In the method for producing the expandable polystyrene resin particles of the present invention, the temperature of the cold portion water is not higher than the glass transition temperature Tg of the expandable polystyrene resin particles, and is preferably 20 to 6 (rC). When the temperature of the cooling water exceeds the glass transition temperature Tg of the expandable polystyrene resin particles, the foamable polyethylene-based resin particles are easily fused to each other, and a plurality of particles are bonded to each other to form a block. When the temperature of the cooling water is not sufficient, the foaming benzene-based resin particles obtained are not spheroidized, and cracks are likely to occur. Further, the cooling water is preferably pressurized first. 5MPa以上以上。 In order to pressurize the cooling water, it can pass through the cutting chamber 7 from the discharge side of the pressure pump 9 = 323480 21 201219468 in the # circulation path of the cooling water to the solid-liquid separation function. The s. . 5MPa range (reheat step) on The foamable polystyrene-based resin obtained by the granulation step is heated by a temperature of (the glass transition temperature of the expandable polystyrene-based resin particles is Tg - 5) ° C or higher, and is invented by the invention. The foamable polystyrene resin particles may be continuously carried out after the production of the expandable polystyrene resin particles in the granulation step, or the foaming polystyrene may be produced in the granulation step. After the resin particles are stored, they are taken out, taken out after any storage period, and subjected to a reheating step. The reheating step is, for example, placed in a pressure-resistant container having a temperature regulating function, such as water, at a temperature within the above temperature range. Heating/insulation can be efficiently carried out by adding the expandable polystyrene resin particles obtained by the granulation step to the heat medium. The heating temperature in the reheating step is (foaming polyphenylene) The glass transition temperature Tg-5) of the ethylene resin particles may be a temperature of not less than ° C. Specifically, an expandable polystyrene tree having a Tg of 61 ° C used in the examples described later is used. In the case of the lipid particles, the heating temperature is set to 56 ° C or higher. The heating temperature may be 150 ° C or higher. However, from the viewpoint that the resin particles are less fused to each other, it is preferable to set the upper limit at about 150 ° C. The heating temperature at this time is preferably set in the range of 60 to 90 ° C. If the heating temperature is not reached (the glass transition temperature Tg-5 of 22 323480 201219468 foaming polystyrene resin particles) ° C, then The bubbles in the expanded beads obtained by heating and foaming the obtained expandable polystyrene-based resin particles are not thinned, and the mechanical strength of the foamed molded body obtained by foam molding the expanded particles in the mold is 5范围的范围。 The range of the range of 0. 1 to 0. 5MPa. If the pressure exceeds 1.5 MPa, the mechanical strength of the obtained foamed molded article may be lowered. Further, in order to increase the pressure resistance of the pressure-resistant container used in the reheating step, the container must be thick, and the quality of the pressure-resistant container becomes heavy, which is not preferable. The heat treatment time of the above reheating step is not particularly limited, and is preferably set to about 1 to 10 minutes, more preferably about 1 to 5 minutes. When the heat treatment time is short, the effect of sufficiently improving the bubble structure of the foamable polystyrene resin particles obtained in the granulation step and improving the mechanical strength of the foamed molded article cannot be obtained. On the other hand, if the heat treatment time is long, the production efficiency of the expandable polystyrene resin particles is lowered, and the cost is increased, which is not preferable. The expandable polystyrene-based resin particles which have been subjected to the reheating step are used to produce polystyrene-based resin-prepared expanded particles by adding an additive such as a surface modifier or drying treatment. In the method for producing the foamable polystyrene resin particles, the expandable polystyrene resin particles obtained by the melt extrusion method are used (the glass transition temperature Tg of the expandable polystyrene resin particles). 5) A method of obtaining a foamable polystyrene resin particle by heating at a temperature of not higher than °C. Therefore, when the obtained expandable polystyrene-based resin particles are heated and foamed, they are distributed throughout the hair; 23 323480 201219468 = = :: = = =; The foamed particles of the foamed particles, the impact resistance, and the like, the foaming polystyrene resin of the molded body = and (4) the superior foaming body, the resin, the pre-expanded foaming particles, and the polystyrene resin foam The U-polystyrene-based resin particles of the cost-electricity month are used in a device and a method known in the field of manufacturing a foamed resin = body, and are pre-foamed by heating with steam, and are used as a polystyrene type of the invention. It is intended to prepare hair = particles (hereinafter referred to as preliminary foamed particles). The preliminary expanded beads are pre-expanded to have the same bulk density as that of the polystyrene-based resin foam molded article (hereinafter referred to as a foamed molded article) to be produced. In the present invention, the bulk density and the volume expansion ratio are not limited, and are usually in the range of 〇.(4) to 〇i〇〇g/cm3 (the volume secret number is in the range of 1G to (10) times (1), preferably 〇 · 015 to 〇 · 050g/cm3. And 'The bulk density and volume expansion ratio of the pre-expanded particles in the present invention are based on the claw leg 1: 1995 "Test method for thermosetting plastics" The value measured. <Volume Density of Preliminary Expanded Particles> The pre-expanded particles were filled in a graduated cylinder to a mark of 500 cm3. However, visually inspecting the cylinder from the horizontal direction, the preparation of the foamed particles is completed as long as one of the particles reaches the 0cm3 scale of the rib. Next, weigh the amount of the foamed particles filled in the measuring cylinder to the effective number of 2 digits below the decimal point, and the quality is W (g). The bulk density of the preliminary expanded particles was calculated according to the following formula. 323480 24 201219468 Bulk density (g/cm3)=W/500 <Volume expansion ratio of preliminary expanded particles> Further, the volume expansion ratio of the preliminary expanded particles is a value calculated according to the following formula. Volume expansion ratio = 1 / volume density (g/cm3) The preliminary foamed particles are filled in a cavity of a molding die by using a device and a method known in the field of manufacturing a foamed resin molded body. The foamed molded body is produced by foam molding in a mold by heating by steam or the like. The polystyrene-based resin foam molded article of the present invention is in a state in which the foaming molding is X times the expansion ratio, and the average bubble diameter D3 of the expanded particles having the foamed molded body is the above formula ( 3) When the conversion ratio is 50 times, the internal average cell diameter of the expanded particles in the foamed molded article]3 satisfies the relationship of 35/zm$D3$140/zm, and the surface layer of the expanded particles is averaged. The bubble diameter/internal average cell diameter is in the range of 〇80 to 12 Torr and the bubble structure of the foamed molded article is 10% or less. In the state in which the polystyrene-based resin foam molded article of the present invention is foam-molded to a multiple of X, the internal average cell diameter D3' of the expanded particles fused in the foamed molded article is expressed by the above formula (3). When converted into a foaming ratio of 5 times, the internal average bubble diameter of the foamed particles in the foamed molded article satisfies the relationship of 35 to 111$〇3$140//111. When the internal average cell diameter 1)3 is less than 35#πι, the polystyrene-based resin foam molded article obtained by in-mold foam molding has an increased continuous cell ratio, and the number of closed cells is reduced, resulting in bending strength, Mechanical strength such as compressive strength and impact resistance is lowered. When the internal average bubble diameter D3 exceeds 140 #m as described above, the mechanical strength such as bending strength, compressive strength, and impact resistance is lowered. The range of D3 is preferably 40/zmSD3$120#m, more preferably 45/zmSD3$115/zm.至内的范围内。 The styrene resin foaming molding system of the present invention, the foaming particles of the surface of the average bubble diameter / internal average bubble diameter of the value of the range of 0.80 to 1.20. When the value of the average cell diameter/internal average cell diameter of the surface layer portion is outside the above range, the flexural strength, compressive strength, and impact resistance of the polystyrene resin foam molded article obtained by foam molding in the mold are caused. The mechanical strength is reduced. The preferred range is from 0.90 to 1.00, and more preferably from 0.93 to 1.06. The foamed molded article of the styrene resin foam molding system of the present invention has a continuous cell ratio of 10% or less, preferably 8% or less. When the above-mentioned continuous cell ratio exceeds 10%, the mechanical strength such as bending strength, compressive strength, and impact resistance of the polystyrene-based resin foam molded article obtained by foam molding in a mold is lowered. 015至0. 050g/ The range of the 0. 015 to 0. 050g / 050g / 0. 050g / 0. 010g / 0. 050g / Within the range of cm3. In the present invention, the density of the foamed molded article refers to the density of the foamed molded article measured by the method described in JIS K7122: 1999 "Foaming of plastics and rubber-measurement of appearance density". <Density of foamed molded article> A test piece of 50 cm 3 or more (100 cm 3 or more in the case of semi-rigid and soft material) was cut so as not to change the original particle structure of the material, and the mass of 26 323480 201219468 was measured, according to the following. The formula calculates the density. Density (g/cm3) = test piece mass (g) / test piece volume (cm3) The test piece for the measurement was cut out from the sample after 72 hours or more after molding, at 23t: ± 2 ° C x 50% ± 5% or 27t: A test piece of ±2 ° C x 65% ± 5% atmospheric conditions (temperature and humidity conditions) was allowed to stand for more than 16 hours. <Foaming magnification of the foamed molded article> The foaming ratio of the foamed molded article is a value calculated according to the following formula. Foaming ratio = 1 / density (g/cm3) The foamed molded article of the present invention is produced by using the above-mentioned expandable polystyrene resin particles, and therefore has a bending strength as compared with the conventional product which is not subjected to the above reheating step. Excellent mechanical strength, heat insulation and cushioning properties such as compressive strength and impact resistance. Further, a heat insulating material or a cushioning material can be produced using the foamed molded article of the present invention. By using the foamed molded article of the present invention, it is possible to produce a heat insulating material having superior heat insulating properties or a cushioning material having superior cushioning properties. (Polystyrene-based wax-molded molded article, heat-insulating material, and cushioning material) The polystyrene-based resin foam molded article of the present invention is obtained by foaming a polystyrene-based resin particle containing a foaming agent. The polystyrene-based resin-prepared foamed particles obtained by heating the styrene-based resin particles are filled in a cavity of a molding die, and are obtained by foam molding in a mold. In addition, the polystyrene-based resin foam molded article of the present invention has an internal average bubble in a state in which the foamable polystyrene-based resin particles are heated and foamed into a preliminary foamed particle having a volume expansion ratio of 50 times. The diameter is in the range of 35 to 140# m, 27 323480 201219468 The average bubble diameter/internal average bubble diameter of the surface layer is in the range of 0.80 SI. 20 and the continuous gas material is below 丨〇%. Further, the volume expansion ratio of the pre-packaged particles refers to a volumetric foaming ratio which is determined by the volumetric hair-shooting method and the number-riding method of the polystyrene tree. In the above-mentioned hair->polystyrene-based resin particles, when the H-fold expansion ratio of the foamed preliminary foamed particles is heated to 5Q times, the average bubble diameter D2 in the preliminary foamed particles is as described above. The formula (2) is converted into a volume expansion ratio of 5 〇, and the internal average bubble diameter _ is preferably satisfied to be 14 〇", which is obtained by foam molding the preliminary expanded particles in a mold. The bubble structure of the heat insulating material or the cushioning material formed by the resin foam molded body is also the same. ^ The above-mentioned recording polystyrene phenyl tree is used to heat up to make foaming = multiple times 5 times the number of the recording filaments, (4) The average bubble diameter is in the range of I40#m, preferably 4Q ^ If the above internal average line does not reach the heart m, „, then the foam is molded into the mold, and the polyethylene resin foam molded body is formed by the continuous bubble. σ, the number of independent bubbles is reduced, which will lead to mechanical strength such as bending, and the like. The internal second degree and the richness will result in bending strength, compressive strength and impact resistance of over 140 "Ε The above-mentioned foaming polystyrene tree' strength Reduce the foaming enthalpy I π ^ to foam the foam 50 times in the body State, the average gas scent = value in the surface layer is in the range of .8 to h2. Compared with the range in the garden, the average bubble diameter/inside 323480 28 .201219468 value in the surface layer will result in the mold. The flexural strength of the polystyrene-baked resin foamed molded article, which is known by the foaming molding, is reduced in mechanical strength such as bending strength, impact resistance, and impact resistance. Further, in the present invention, "the surface layer portion has a uniform bubble diameter" means The foamable polystyrene-based resin particles are foamed into a state of a pre-expanded particle having a volume expansion ratio of 50 times, and the cross-section of the pre-expanded particle by the center is cut from the surface of the preliminary expanded particle. The area up to 1/4 of the diameter of the expanded particles is defined as the "surface layer portion", and the average bubble diameter of the bubbles in the surface layer portion. In addition, the "internal average bubble diameter" means an area (the area on the center side) which is deeper than the surface layer portion of the same preliminary foamed particle, and is defined as "inside", and the average bubble diameter of the bubble inside the inside. The foamable polystyrene-based resin particles are foamed to a foamed particle size of 50 times by volume, and the continuous cell ratio is 1% by mole or less, preferably 8% or less. When the continuous cell ratio is more than 10%, the mechanical strength such as the flexural strength, the compressive strength, and the impact resistance of the polystyrene-based resin foam molded article obtained by foaming in the mold is lowered. The polystyrene-based resin is not particularly limited, and examples thereof include styrene, nonylstyrene, vinyl fluorene, gas styrene, ethyl styrene, and isopropyl. A single polymer of a styrene monomer such as styrene, dimercaptostyrene or bromostyrene or a copolymer of the above. Further, it is preferable to use a polystyrene resin containing 50% by mass or more of styrene, and more preferably polystyrene. Further, the polystyrene-based resin may be a copolymer of the above styrene monomer as a main component of the styrene monomer and a vinyl monomer copolymerizable with the styrene monomer. Examples of the vinyl monomer include alkyl (meth)acrylate such as (meth)acrylic acid acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, and hexadecyl (meth) acrylate. , (fluorenyl) acrylonitrile, dinonyl maleate, dinonyl fumarate, diethyl fumarate, ethyl fumarate, divinylbenzene, alkylene glycol dimethacrylate, etc. Difunctional monomer and the like. Further, as long as the main component is a polystyrene resin, other resins may be added. The resin to be added may, for example, be used for improving the impact resistance of the foamed molded article, and adding a diene rubber such as a polybutadiene, a styrene-butadiene copolymer, or an ethylene-propylene-nonconjugated diene three-dimensional copolymer. The rubber-modified polystyrene resin of the polymer is a so-called high impact polystyrene. Further, examples thereof include a polyethylene resin, a polypropylene resin, an acrylic resin, an acrylonitrile-styrene copolymer, and an acrylonitrile-butadiene-styrene copolymer. A polystyrene-based resin which is a non-recycled raw material such as a polystyrene-based resin which is re-produced by a suspension polymerization method or the like, which is a commercially available polystyrene-based resin, can be used. In the case of using polystyrene), it is also possible to use a recycled raw material obtained by subjecting a used polystyrene-based resin foam molded body to a recycling treatment. The recovered raw material is recovered from a polystyrene-based resin foam molded body, for example, a fish tank, a home appliance heat insulating material, a food packaging tray, and the like, and is recovered by a limonene dissolution method or a heating volume reduction method. A raw material having a mass average molecular weight Mw in the range of 120,000 to 400,000 is appropriately selected, and a plurality of recycled raw materials having different mass average molecular weights Mw may be appropriately used in combination. 30 323480 201219468 The above-mentioned foaming polystyrene (IV) tree filaments are defined by =. For example, it can be used as an aliphatic cigarette such as propylene, butyl pentoxide, pentylene pentoxide, neopentyl pentoxide, cyclamate, etc.; hydrazine, lysine; methanol, ethanol, etc. _; carbonic acid, nitrogen, water, etc. It is preferably an aliphatic hydrocarbon. Furthermore, it is better to be burnt and special. It is a pentane, an isoflavone (4) of these ages. It is also best to use a carbon atom, a hydrocarbon, a heterogeneous, a new form, a ring, or a mixture thereof. Among them, it is better to use a mixture of the two sisters. In addition, 'the above-mentioned carbon source number = or hydrocarbon as a new, boiling point above the catch, carbon number of two 5 of the foaming agent (such as n-butadiene, isobutane, propane, carbonic acid gas, etc.; With respect to 100 parts by mass of the polystyrene resin, it is preferably in the range of 2 to 15 parts by mass, more preferably in the range of 3 to 2 parts by mass, preferably in the range of 4 to 7 parts by mass. The foamable polystyrene-based resin particles are preferably GG parts by mass of a resin, preferably added to a polyoxyethylene phthalic acid, a synthetic or naturally occurring dioxo sulphur powder, a nucleating agent, or a chemical foaming agent. Preferably, the bubble nucleating agent is a bubble of a thermoplastic resin (10) by mass, and the bubble nucleating agent is at least 5 parts by mass, more preferably 〇. 5 to 2.0 parts by mass. A good chemical foaming agent can be exemplified by money (4). The above-mentioned methylenetetramine training base double (benzazole conversion; carbon five addition 'the above-mentioned emulsion nucleating agent to use talc powder such as several 323480 31 201219468 • masterbatch type bubble nucleating agent is relatively ruthenous. By using the master batch When the polynuclear resin is mixed with the bubble nucleating agent in the resin supply device, the inorganic powder or the chemical foaming agent can be divided into a state in which the inorganic powder or the chemical foaming agent is dispersed in a very uniform state. In addition to the above-mentioned foaming agent and the nucleating agent, the viscous polystyrene resin particles can be added in a range that does not impair the physical properties of the foamable polystyrene resin particles and the foamed molded article obtained. Additives such as a solvent, a bubble regulator, a crosslinking agent, a filler, a flame retardant, a flame retardant aid, a lubricant, a colorant, etc. The polystyrene-based resin foam molded body of the present invention is composed of a foamable polyphenylene. The ethylene resin particles are heated to a state in which the foaming is 50 times the volume expansion ratio of the pre-expanded particles, and the internal average cell diameter is in the range of 35 to 140 //m, and the average cell diameter/internal average cell diameter in the surface layer portion. At 0.80 to 1.20 The pre-expanded particles having a bubble structure having an open cell ratio of 10% or less are obtained by foam molding in a mold. Therefore, the entire pre-expanded particles form relatively small uniform bubbles, and the pre-expanded particles are formed. The foamed molded article obtained by foam molding in a mold has excellent mechanical strength such as bending strength, compressive strength, and impact resistance; and has excellent heat insulating properties and cushioning properties. Further, the polystyrene resin of the present invention can also be used. In the foam molded article, a heat insulating material or a cushioning material is produced. By using the polystyrene resin foam molded article of the present invention, a heat insulating material having superior heat insulating properties or a cushioning material having superior cushioning properties can be produced. (Method for Producing Styrene-Based Resin Foamed Molded Body) Next, a method for producing a polystyrene-based resin foam molding 32 323480 201219468 of the present invention will be described with reference to the drawings. The manufacturing method includes: adding a foaming agent to a polystyrene resin in a resin supply device, kneading, and setting a molten resin containing a foaming agent from a tree. The small hole of the mold at the tip end of the supply device is extruded in a cooling liquid that does not reach the glass transition temperature Tg of the expandable polystyrene resin particles, and the extrudate is cut while being extruded, and the squeeze is squeezed. The product is cooled and solidified by contact with the liquid for cooling, and the granulation step of the expandable polystyrene resin particles is obtained (first step); and the foamable polystyrene resin obtained is (foaming polymerization) Heating at a glass transition temperature Tg_5yca of the styrene resin particles to obtain a reheating step of the expandable polystyrene resin particles (second step); Next, heating the obtained expandable polystyrene resin particles The inner average cell diameter h of the preliminary expanded particles having a volume expansion ratio of 50 times in terms of the above formula (2) is in the range of 35 to 14 Å/m, and the average cell diameter/internal average cell diameter in the surface layer portion. a preliminary foaming step (third step) of the polystyrene-based resin-prepared expanded particles of a bubble structure having a value of 〇8〇 to 丨.2〇 and an open cell ratio of 1% or less; and, Gather the above Ethylene-based resin pre-expanded beads filled in a mold groove forming mold, heating the mold for molding the foam molding step (step 4). (granulation step) Fig. 1 is a configuration diagram showing an example of a production apparatus for producing expandable polystyrene resin particles in the above granulation step. The manufacturing apparatus of the present embodiment includes an extruder 1 as a resin supply device, and a mold 2 having a plurality of small holes attached to the front end of the extruder i; 323480 33 201219468 Injecting a resin material or the like into the extruder 1 The raw material supply hopper 3; in the extruder 1, the foaming agent is pressed into the molten resin in the molten resin through the blowing agent supply port 5; the resin discharge surface and the cooling water of the mold 2 through which the small holes are formed In the manner of contact setting, the cutting chamber 7 for supplying cooling water in the indoor circulation is provided in the cutting chamber 7 to be rotatable cut (4) 6 which can be cut from the resin extruded from the small hole of the mold 2; The flow of cooling water is carried by foaming (10) and the cold county is difficult to separate and dehydrated (4), obtained = attached to the bubble tree (4) liquid separation Wei's dehydration dryer 1; will be attached by the ship The cooling water separated by the dehydration machine 10 is (4) stored in the water tank 8; the cooling water in the water tank 8 is sent to the two pressure pumps 9 of the cutting chamber 7; k mouth-to-mouth knife dewatering dryer 10 dehydration drying non-foaming resin particles to be stored and stored Further, as the extruder 1, any one of an extruder using a screw: an extruder having no screw or a screw using no screw may be used, for example, an early-axis extruder, a multi-axis. Type of extruder, etc. For example, a piston type mixer is not provided for riding a hut 4-crank extruder, a string extruder, or a gear pump type m. From the point of view: = extruder can use the static 蝉椁μ (four), in order to make the 'cutting cutter 6 cut " can also be used in the use of flute 1m main-10,000 points Known in the past. The manufacturing device is shown to produce foaming poly_17 I* grease particles, first of all - (10) Polyethylene Μ Μ 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原 原It is put into the extruder 1 during the period. ® Adding 洌, from the raw material supply hopper 3 ',; ': Polyphenylene phthalate resin can be made into a key or 323480 34 201219468 granules, fully mixed beforehand, from a raw material supply hopper, Alternatively, for example, when a plurality of batches are used, each batch is fed into a raw material from a plurality of raw material supply hoppers having an adjusted supply amount, and these are mixed in an extruder. Further, when a plurality of batches of the recovered raw materials are used in combination, it is preferred to thoroughly mix the raw materials of the plurality of batches beforehand, and remove the foreign matter by a suitable screening method such as magnetic gas screening or pass-through, specific gravity screening, and air filtration. After the polystyrene resin, the nucleating agent, and other additives are supplied to the extruder 1, the resin is heated and melted, and the molten resin is transferred to the mold 2 while being pressurized from the blowing agent supply port 5 by the high pressure. The pump 4 presses the blowing agent into 'mixing the blowing agent in the molten resin. The tweezers are removed by the foreign matter provided in the extruder, and the molten material is moved to the distal end side while kneading, and the molten material to which the foaming agent is added is small from the mold 2 provided at the front end of the extruder 1. Hole extrusion. The resin discharge surface through which the small holes of the mold 2 are passed is disposed in the cutting chamber 7 which circulates the cooling water indoors. Further, the cutting chamber 7 is provided with a cutter 6 which can cut the resin extruded from the small hole of the mold 2 and rotate it. When the molten material to which the foaming agent is added is extruded from the small hole of the mold 2 provided at the front end of the extruder 1, the molten material is cut into pellets by the cutter 6, and is rapidly cooled by contact with the cooling water. The expandable polystyrene resin particles were obtained. The obtained expandable polystyrene resin particles are transported from the cutting chamber 7 with the flow of the cooling water to the dehydration dryer 1 to which the solid-liquid separation function is attached. The expandable polystyrene resin particles are dehydrated and dried while being separated from the cooling water by the dehydration dryer 10 having a solid-liquid separation function. The dried foamable polystyrene resin particles are stored in the storage container U. 35 323480 201219468 - In the granulation step, the temperature of the cooling water is a temperature which is less than the glass transition temperature Tg of the expandable polystyrene resin particles, preferably in the range of 20 to 60 °C. When the temperature of the cooling water exceeds the glass transition temperature T, g of the expandable polystyrene resin particles, the expandable polystyrene resin particles are easily fused to each other, and a plurality of particles are bonded to each other to form a block shape. The incidence of good products is high. When the degree of the cooling water is less than 20 °C, the obtained expandable polystyrene-based resin particles are not spheroidized, and cracks are likely to occur. 5以上以上。 In addition, the above-mentioned cooling water is preferably first pressurized to 0. 5MPa or more. The cooling water can be pressurized by passing through the cutting chamber 7 from the discharge side of the high pressure pump 9 to the inlet side of the dehydration dryer 10 having the solid-liquid separation function in the circulation path of the cooling water. The pressurized region is raised by increasing the discharge pressure of the high pressure pump 9. The range of 0. 8至1. 5MPa。 The range of the range of 0. 8 to 1. 5MPa. (Reheating step) The expandable polystyrene resin obtained in the granulation step is then heated at a temperature of (Cg transition temperature Tg-5 of the expandable polystyrene resin particles) ° C or higher. The foamable polystyrene resin particles of the invention described above are used. This reheating step may be carried out continuously after the production of the expandable polystyrene resin particles in the granulation step, or may be stored after the production of the expandable polystyrene resin particles in the granulation step, and may be stored for any storage period. After taking out, the reheating step is carried out. The reheating step is carried out, for example, by placing a heat medium, such as water, in a temperature-pressure vessel having a temperature regulating function, and heating at a temperature within the above temperature range/36 323480 201219468, by granulating in the heat medium. The foamable polystyrene-based resin particles obtained in the step can be efficiently carried out. The heating temperature in the reheating step may be any temperature (glass transition temperature Tg-5 of the expandable polystyrene resin particles) °C or higher. Specifically, when the Tg used in the examples described later is 61 ° C foamable polystyrene resin particles, the heating temperature is set to 56 ° C or higher. Although the heating temperature may be 150 ° C or higher, it is preferable to set the upper limit at about 150 ° C from the viewpoint that the fusion of the resin particles is small. The heating temperature at this time is more preferably set in the range of 60 to 90 °C. When the heating temperature is less than (the glass transition temperature Tg-5 of the expandable polystyrene resin particles) ° C, the obtained expandable polystyrene resin particles are heated and foamed in the expanded particles. The bubbles do not become fine, and the mechanical strength of the foamed molded article obtained by subjecting the expanded particles to foam molding in the mold may be lowered. 5至范围内。 The range of the range of from 0.1 to 0. 5MPa. If the pressure exceeds 1.5 MPa, the mechanical strength of the obtained foamed molded article may be lowered. Further, in order to increase the pressure resistance of the pressure resistant container used in the reheating step, the container must be thick, and the quality of the financial pressure container becomes heavy, which is not preferable. The heat treatment time in the above reheating step is not particularly limited, but is preferably from about 1 to 10 minutes, more preferably from about 1 to 5 minutes. When the heat treatment time is short, the effect of sufficiently improving the bubble structure of the expandable polystyrene resin particles obtained in the granulation step and improving the mechanical strength of the foamed molded article cannot be obtained. On the other hand, when the heat treatment time is long, the production efficiency of the expandable polystyrene-based resin particles is lowered, and the cost is increased, which is not preferable. 37 323480 201219468, 70% 3H reheating step of the expandable polystyrene resin particles by the = force table = modifiers and other additives, drying treatment, etc., after the necessary treatment, after foaming through the polystyrene resin The particles are used to produce a polystyrene resin foam molded body. (Pre-foaming step) The foamable polystyrene (10) and lion particles obtained by the reheating treatment are used in a device and a method known in the field of manufacturing a foamed resin molded body, and are prepared by heating by steam or the like. The foam was prepared into a pre-particle of a polystyrene-based resin (hereinafter referred to as "pre-expanded particles"). The preliminary foaming particles are prepared/packed to have the same bulk density as the density of the polystyrene resin foam molded article to be produced. In the present invention, the bulk density and the volume expansion ratio are not limited to 'normally in the range of 〇·010 to 0. 100g/cm3 (volume expansion ratio is in the range of 10 to 1〇〇), preferably It is in the range of 0.015 to 0.050 g/cm. Further, the bulk density and the volume foaming ratio of the preliminary expanded particles in the present invention are values measured in accordance with JIS K6911: 1995 "General Test Method for Thermosetting Plastics". <Volume Density of Preliminary Expanded Particles> The pre-expanded particles were filled in a graduated cylinder to a mark of 500 cm3. However, visually inspecting the cylinder from the 3 horizontal direction, the filling of the prepared foamed particles is completed as long as one grain reaches the 500 cm mark. Next, the mass of the preliminary expanded particles filled in the measuring cylinder is weighed to a significant number of two digits below the decimal point, and the mass is W (g). The bulk density of the preliminary expanded particles was calculated according to the following formula. Bulk density (g/cm3)=W/500 323480 38 201219468 <Volume expansion ratio of preliminary expanded particles> Further, the volume expansion ratio of the preliminary expanded particles is a value calculated according to the following formula. Volume expansion ratio = 1 / volume density (g/cm3) The above-mentioned preliminary foamed particles are filled in a cavity of a molding die by means of a device and a method known in the field of manufacturing a foamed resin molded body, and heated by steam. After heating, it is foam-molded in a mold, and a heat insulating material or a cushioning material which is a foamed molded body of a polystyrene-based resin is obtained. The polystyrene-based resin foam molded article of the present invention has a state in which the foaming molding is expanded by a factor of X, and has an internal average bubble diameter D3 of the expanded particles fused in the foamed molded article. (3) When the expansion ratio is 5 〇 times, the internal average bubble diameter 〇3 of the expanded beads in the foamed molded article satisfies the relationship of 140/ζη, and the average bubble diameter/internal average bubble of the surface layer of the expanded particles The value of the diameter is in the range of 〇8〇 to 12〇 and the bubble structure of the foamed molded body is 10% or less. In the state in which the polystyrene-based resin foam molded article of the present invention is foam-molded at a multiple of X times, the expanded particles fused in the foam molded body: an internal average bubble diameter D3, which is represented by the above formula ( 3) When converted into a foaming ratio of 5 times, the internal average bubble diameter D3 of the expanded beads in the foamed molded article satisfies the relationship of 35emSDd 140 #ra. When the internal average cell diameter 〇3 is less than 35 μm, the polystyrene resin foam molded article obtained by in-mold foam molding has an increased continuous cell ratio, and the number of independent bubbles is reduced, resulting in bending strength, compressive strength, and Mechanical strength such as impact resistance is lowered. When the internal average bubble diameter Da exceeds 14 〇em, the bending strength, the mechanical strength such as 323480 39 201219468 compressive strength, and impact resistance are lowered. The range of D3 is preferably 40/zmSD3S12〇vm'. More preferably, the foamed molded article of the present invention is a foamed molded body of the present invention, and the average cell diameter/internal average cell diameter of the surface layer of the foaming teachant is 〇. 80 to Within the range of 丨.2().

The outer strength of the above-mentioned range results in a decrease in mechanical strength such as bending strength, compressive strength, and impact resistance of the polystyrene-based resin foam molded article obtained by foam molding in a mold. A preferred range is from 0.90 to 1.10, and a better range is 〇·93 1·06. The styrene resin foam molded article of the present invention has a continuous cell ratio of 10% or less by 8% or less, preferably 8% or less. When the continuous cell ratio exceeds 10%, the flexural strength, compressive strength, impact resistance and mechanical strength of the polystyrene resin foam molded article obtained by foam molding in a mold are lowered. The density of the foamed molded article of the present invention is not particularly limited, and is usually from 0. 015 to 0 in the range of from 〇1〇 to 0.10g/on3 (volume expansion ratio of 10 to 1〇〇). Within the range of 050g/cm3. In the present invention, the density of the polystyrene resin foam molded article refers to the density of the foamed molded article measured by the method described in JIS K7122: 1999 "Foamed Plastics and Rubber - Determination of Appearance Density". <Density of foamed molded body>

100 cm3 or more) 7 breaks, and measured 323480 40 201219468 Mass 'The density was calculated according to the following formula. Maleness (g/cm3) = test piece mass (g) / test piece volume (coffee 3) The test piece for the test is a test which is more than 72 hours after the formation of the test ^^23〇C±2〇Cx50%±5% ^27°C±2〇Cx65%±5%^riL^ (conditions of temperature and humidity) The test piece was placed for more than 16 hours. <Foaming magnification of the foamed molded article> Further, the foaming ratio of the foamed molded article is based on the following common value. Foaming ratio = 1 / density (g/cm3) The polystyrene resin of the present invention is produced. In the method of forming a foamed body, the expandable polystyrene-based resin particles obtained by the melt-squeezing method are at a temperature above the glass transition temperature Tg_5 of the expandable polystyrene resin particles, Qc and above. G. The pressure of 5 MPa or less is heat-treated to obtain a method of foaming polystyrene-based resin particles. Therefore, when heating and foaming, a uniform single-domain bubble having a small tb is formed throughout the hair. The foamed particles are foam-molded in a mold, and the polystyrene-based resin foam molded body excellent in mechanical strength, heat insulating property, and cushioning property such as strength, compressive strength, and impact resistance can be efficiently produced. [Examples] [Example 1] (Production of foamable polystyrene. Rare. Resin particles) As a base resin, it is based on polystyrene resin (T〇y)制造Styrene company, trade name "hrm-i〇N") 100 quality , talc powder masterbatch (polystyrene resin 40% by mass, talc powder 6〇 mass%) 〇.5 323480 41 201219468 parts by mass, pre-mixed to a ratio of 160kg / hour per hour to a uniaxial extrusion of 90mm After the resin was heated and melted in the machine, 6 parts by mass of isopentane as a foaming agent per 100 parts by mass of the resin was injected from the extruder. The resin and the foaming agent were kneaded in the extruder, and the temperature of the resin at the tip of the extruder was cooled to 170 ° C while being held at 290X by a heater provided in the extruder, and had a diameter of 200 〇. 6mm, the granulation mold for the nozzle of the forming section length of 3.0 mm, is cut in the water cutting chamber at a temperature of 5 ° ° C, water migrating 1.5 MPa, and has a high speed of 10 blades in the circumferential direction. The rotary cutter was adhered to the mold, and the resin was cut at 3,000 rotations per minute, and dehydrated and dried to obtain spherical foamable polystyrene resin particles. The obtained expandable polystyrene resin particles were not deformed, long whiskers, etc., and had an average particle diameter of l lmm. ^ Next, in the autoclave for reheating, the internal volume is 5.7 liters, and the above-mentioned foaming polystyrene resin particles 2000 g are placed in a pressure cooker equipped with a stirrer, and steaming water 25 〇〇 g, twelve Burnt-based stupid yellow sulphate. 5g, ^ mix to disperse. The dispersion was pressurized with a nitrogen gas at 0. 2 MPa, and the temperature was raised to 80 ° C. After 3 minutes, the mixture was cooled, taken out, washed, dehydrated, and dried. 3 parts by mass of polyethylene glycol 〇. 〇3 parts by mass, zinc stearate 〇. 质量 5 parts by mass, stearic acid monoglyceride 相对 with respect to 1 part by mass of the obtained expandable polystyrene resin particles. .05 parts by mass, hydroxystearic acid monoglyceride 〇〇5-type flaws, the surface of the expandable polystyrene-based resin particles is completely uniformly coated with 0 (manufacture of a foamed molded article). The expandable polystyrene resin particles (for 323480 42 201219468 slabs) are supplied to a cylindrical batch type pre-expansion machine, and by blowing into a vacuum of 0. 05 MPa, the milk is heated and foamed. The preliminary expanded particles were obtained. Received ^ times). h package particle bulk density is G.Q2Gg/em3 (volume expansion ratio / subsequent 35 obtained preliminary foamed particles placed in a room temperature environment for 24 hours, the pre-expanded foam particles are filled with a long shed, a wide range, 25 nm high In the square of the rectangular (four) groove, the mold is heated by the forming vapor pressure %% (gauge pressure) for 3 seconds, heated for W seconds, the other side is heated for 3 seconds, both sides are heated for 10 seconds, water is cooled for 5 seconds, and the take-out surface is set. The pellets, the pre-expanded beads, and the foamed molded article were measured for the amount of gas, the Tg of the expandable polystyrene resin, and the internal average bubbles by the following measurement method. The test results of the average cell diameter, the open cell ratio, the odd curvature, the compressive strength, the heat insulating property (thermal conductivity), and the drop test in the surface and the surface layer are shown in Table 1. [The amount of gas contained] The beads were heated at a temperature of 145. (: Heating for 2 hours, the amount of measurement was measured, and the amount of gas contained was calculated. <Measurement of foaming polystyrene-based resin particles Tg>

The measurement of Tg was measured based on the test method of JIS K7121. Specifically, using a differential scanning calorimeter device model DSC6220 (manufactured by SII NanoTechnology Co., Ltd.), the sample container was filled with 6. 5 mg of the sample beads, and the temperature was raised from 30 ° C at a temperature increase rate of 25 ml/min and 203⁄4 /min. At 200 ° C, the intermediate point glass transition temperature was taken as the glass 323480 43 201219468 - transfer temperature. &lt;Measurement of the average bubble diameter inside the preliminary expanded particles&gt; The internal average cell diameter of the preliminary expanded particles is measured based on the test method of ASTM D2842-69. Specifically, first, the razor tooth is cut by a plane near the center of the preliminary foamed particle, and the cut surface is magnified 15 times and photographed using a scanning electron microscope (manufactured by JOEL Corporation under the trade name "JSM-6360LV"). . Next, the photographed face was printed on A4 paper, and the first circle (inscribed circle) inscribed on the surface layer of the preliminary foamed particles was drawn. A second concentric circle having a diameter of 1/2 (a radius of 1/4) is drawn with respect to the diameter of the first circle, and a straight line of 60 mm in length is drawn at an inner side of the second circle, according to the following formula: The number of bubbles present on the line calculates the average chord length (t) of the bubble. The average chord length t = 60 / (the number of bubbles X is the magnification of the photograph). Further, the drawn straight line is in a state where the straight line does not come into contact with the bubble point as much as possible. In addition, when a part of the bubble is in contact with a straight line, the bubble is also included in the number of bubbles, and the bubble is not penetrated at both ends of the straight line, and when it is in the state of the bubble, the bubble at both ends of the straight line is also included in the number of bubbles. . Based on the calculated average chord length t, the average bubble diameter can be calculated according to the following formula. The average bubble diameter (mm) D = t / 0. 616 The average bubble diameter is calculated in the same manner as described above at any five of the captured images, and the average of the average bubble diameters is taken as the preliminary foamed particles. Internal flat bubble diameter. 44 323480 201219468 &lt;The average bubble diameter of the surface layer portion of the preliminary foamed particles is cut by a plane in the vicinity of the center of the preliminary foamed particles, and a scanning electron microscope (manufactured by JOEL Corporation, trade name "JSM__ 6360LV") is used. ") Zoom in on the cut surface 15 times and shoot. Next, the photographed face was printed on A4 paper, and the first circle (inscribed circle) inscribed on the surface layer of the preliminary foamed particles was drawn. With respect to the first straight circle of 'the first circle', the second is the same as the diameter of 1/2 (the radius of 1/4), and a length of 60 mm is drawn from anywhere between the table ^' and the second circle. The straight line, from the gas on the straight line (four), the average chord length (1) of the bubble and the inner flat / bag! The same is the same as the average bubble diameter of the surface layer. 1. &lt;Measurement of the average cell diameter inside the foamed molded article&gt; The foamed molded article was cut with a lancet tooth and cut using a scanning electron microscope (trade name "manufactured by 0EL Corporation") 15 times and shooting. Double hole Next, the photographed face is printed on the A4 paper, and the third circle (inscribed circle) which is inscribed in the grain boundary of the foamed particles existing on the cut surface is drawn. With respect to the diameter of the crucible 11, a diameter of 1/2 (radius of 1/4) = 2 concentric circles is drawn, and a straight line drawn at any position inside the second circle is present from the line The number of bubbles is calculated by calculating the average chord length (t) of the bubble in the same manner as the internal average cell diameter of the preliminary expanded particles, and the internal average bubble diameter of the foamed molded article is obtained. &lt;Measurement of the average cell diameter of the surface layer portion of the foamed molded article&gt; The foamed ruthenium body was cut with a razor tooth, and this was scanned using a scanning electron microscope (manufactured by JOEL Co., Ltd., trade name rJSM_636〇LV). Cut the surface to enlarge 323480 45 .201219468 15 times and shoot. Then, the photographed face is printed on the A4 paper, and the green is inscribed in the working circle (inscribed circle) of the foamed particle grain boundary existing in the blade cross section. With respect to the diameter of the first circle, a second straight line having a diameter of 1/2 (a radius of 1/4) is drawn, and a straight line of 6 Gmm is drawn from anywhere between the grain boundary and the second circle. The average chord length (t) of the bubble was calculated from the number of bubbles existing on the straight line in the same manner as the internal average cell diameter of the preliminary expanded particle, and the average cell diameter of the surface layer portion of the foamed molded article was determined. &lt;Measurement of the continuous bubble ratio of the preliminary expanded particles&gt; Each of the following tests (1) to (3) was carried out to determine the continuous bubble ratio (%) of the preliminary expanded particles. (1) Measurement of the mass and volume of the pre-expanded particles. The mass of the pre-expanded particles of about 8 〇% is measured in the sample cup of the air-comparative hydrometer (manufactured by Tokyo Scientific Co., Ltd.) [pre-foaming] Particle mass A (g)]. Next, the preliminary foamed particles were placed in a cup, and the cup was placed on the above-mentioned hydrometer. The volume [volume B (cm3) of the preliminary expanded particles] was measured by a 1-1/2-1 gas pressure method. (2) Measuring the appearance volume of the pre-expanded particles, taking out the measuring dish of the electronic scale (HB3000 manufactured by Daiwa Seki Co., Ltd.), and immersing the container in a state in which the container made of the gold mesh is suspended on the attached metal part. In water, determine the mass of the container in water [container mass C (g) in water]. Next, the total amount of the preliminary expanded beads 46 323480 .201219468 measured in the above (1) was placed in the same container, and the total mass of the container and the preliminary expanded particles was measured in the same state of being immersed in water [total mass in water) D(g)]. The apparent volume E (cm3) of the preliminary expanded particles was determined according to the following formula. In addition, 1 g of water was used as a volume of 1 cm3. E = A + (C - D) (3) Open cell ratio From the results of the above (1) and (2), the continuous cell ratio [%] was obtained by the following formula. Open cell ratio (% ΜΕ - Β) / Εχ 100 &lt; Measurement of the continuous cell ratio of the foamed molded article&gt; The foamed molded article was measured for the open cell ratio based on the measurement method described in ASTM D2856-87. In other words, the test piece (25 mm cube) having the cut surface of the skin having no six-faced co-molding surface was cut out into five samples, and the appearance volume was measured with a vernier caliper, and then the air comparison type specific gravity system was used. The Scientific Company manufactures Model 1000) and measures the volume by the 1-1/2-1 barometric method. Open cell rate (% Μ volume of appearance - volume measured by air comparative pycnometer) / appearance volume xlOO &lt; flexural strength&gt; A test piece having a length of 300 mm x a width of 75 mm and a thickness of 25 mm was cut out from the foamed molded article, and the test piece was The bending test was performed based on JIS-A9511, and the bending strength was calculated. &lt;Compressive strength&gt; A test for cutting a length of 50 mm x a width of 50 mm and a thickness of 25 mm from a foamed molded article 47 323480 201219468 • A sheet, and a compression test of the test piece was carried out based on JIS-A9511 as a compressive strength. <Insulation resistance (thermal conductivity)> A test piece having a rectangular parallelepiped shape of 2 mm mm x 200 x X and 25 mm thick was cut out from the polystyrene resin foam molded body. The thermal conductivity of the test piece was based on JIS-A1412, and the thermal conductivity meter (AUTO-Λ HC-072) manufactured by Yinghong Seiki Co., Ltd. was used at a measurement temperature of 23. (Measurement: &lt;Drop test&gt; A test piece having a rectangular shape of 215 mm long and 40 mm wide and 20 mm thick was cut out from the polystyrene resin foam molded body, and was measured at intervals of 150 mm based on jIS K7211. One of the pair of fulcrums is set up with a test piece 'falling 198g of steel ball, and the falling ball impact value is calculated based on the following formula, that is, 50% of the breaking height. Falling ball impact value=H50=Hi-AHx(S/100-1 /2) However, H50: 50% damage height (cm),

Hi : the lowest height (cm) at the time of 100% failure, ΔΗ, the height interval (cm) at which the height of the test piece is raised and lowered, and S: the total (%) of the % of damage at each height. [Example 2] A foam molded article was produced in the same manner as in Example 1 except that the heating temperature was 15 ° C and the pressure was 0.5 MPa, and the same measurement was carried out. The results are shown in the table. [Example 3] 48 323480 201219468 • A foam molded article was produced in the same manner as in Example 1 except that the heating temperature at the time of reheating treatment was 60 °C, and the same measurement was carried out. The results are shown in Table 1. [Example 4] A foam molded article was produced in the same manner as in Example 1 except that the heating temperature at the time of reheating treatment was 57 °C, and the same measurement was carried out. The results are shown in Table 1. [Example 5] A foamed molded article was produced in the same manner as in Example 1 except that the same amount of butane was used as the foaming agent, and the pressure at the time of the reheating treatment was 0.5 MPa, and the same measurement was carried out. The results are shown in Table 1. [Comparative Example 1] A foam molded article was produced in the same manner as in Example 1 except that the heating temperature at the time of reheating treatment was 100 °C, and the same measurement was carried out. The results are shown in Table 1. [Comparative Example 2] The same procedure as in Example 1 was carried out except that the temperature of the cooling water in the water cutting chamber was 70 ° C, and the pressure in the reheating treatment was 1. 5 MPa. The foamed molded body was subjected to the same measurement. The results are shown in Table 1. [Comparative Example 3] A foamed molded article was produced in the same manner as in Example 1 except that the reheating treatment was not carried out, and the same measurement was carried out. The results are shown in Table 1. [Comparative Example 4] 49 323480 201219468 A foam molded article was produced in the same manner as in Example 1 except that the heating temperature at the time of reheating treatment was 40 °C, and the same measurement was carried out. The results are shown in Table 1. [Comparative Example 5] A foam molded article was produced in the same manner as in Example 1 except that the heating time after the temperature increase in the reheating treatment was 1 minute, and the same measurement was carried out. The results are shown in Table 1. 50 323480 j 201219468 [1崦] Comparative Example 5 Isopentane CO s CV3 ο a 0.65 00 in CO s CO 〇〇 0.56 C&lt;J inch-s 〇〇CO 0.56 CO CO 0.29 0.10 j 0.0360 ο c—· Comparative Example 4 isopentane CO s Ln 5 CO ο CO 0.65 03⁄4 uri CO s 〇Cvi CO ! 1.02 CQ s in CO eo CD Ο) Lf3 ί 0.28 °·10 0.0370 in Comparative Example 3 Isopentane CO s in 0.65 05 Lfi CO s inch s OJ CO so CO s OO LT&gt; 0.28 0.10 j 0.0370 m 〇〇Comparative Example 2 Isopentane CO o ΙΛ smm CO o CO ss 00 03 o σ&gt; sm CO 03 〇io ΙΛ CO 0. 30 0.10 1 0.0330 o 比较 · Comparative Example 1 Isopentane CO s ΙΛ o &lt;Ν&gt; ο CO 0.65 CO s C&gt;J CO cn 03 〇·inch s in CO 1.01 inch crj 呀0.30 0.11 0. 0380 o od Example 5 Butane CO s in § in ο CO 0. 65 00 in gs 0.93 . CM s in oo 0.99 (NJ inch · 5 ο 0.13 0.0345 m Example 4 Isopentane CD sm eg ο CO 0. 65 03 in s un LT5 03 o CO s in 0.96 ιτί CO ο CO &lt;=&gt; 0.0335 Lfi in Example 3 Isopentane CO s LO s CM C3 CO 0.65 00 in s 00 σ» 0. 99 CO so O CO LO 0.32 0.13 : 0.0340 o Cd real Example 2 Isopentane CO s ΙΛ s UO ο CO 0.65 03 LO s CO 兮o in s 00 1.03 m 0.31 CO ο 0.0360 Ό od Example 1 Isopentane CO ΙΛ CM ο CO ΙΛ CO o CO CO s LO 1.04 eg oi s 1.06 t— cd CO CO ο 0.13 0.0350 ΙΛ Bu · Type quantity [wt. %] Water temperature [°c] Water pressure [MPa] Water temperature [°c] Water pressure [MPa] Heating time [min] Bulk density [g/ml] Gas content [wt.%] • * ▲ · · m Γ 0 八 ! ! igLIJ volume expansion ratio [times] internal average bubble diameter [/im] surface layer bubble diameter / Internal bubble diameter Continuous bubble rate (3⁄4) Foam multiple [倍] Internal average bubble diameter [jum] Surface bubble diameter / Internal bubble diameter Continuous bubble rate [%] Bending strength [MPa] Compressive strength [MPa] Thermal conductivity [ff] /ink] Falling ball impact value [cm] Foaming agent water t-cutting condition Reheating treatment condition Foaming resin particle physical property preliminary foaming particle physical property molded article physical property heat insulating cushioning property 51 323480 201219468 From the results described in Table 1, The foamed molded article obtained in Examples 1 to 5 of the invention has an internal average gas in a state of foaming into foamed particles having a volume expansion ratio of 50 times. Diameter in the range of 35 to 140 // m, the average cell diameter surface layer portion / inner values of the mean bubble diameter and bubble structure in the cell ratio of 10% or less in the range of billion. Of 80 to 1.20. Further, in the foamed molded article obtained by foam molding the preliminary expanded particles which were foamed to a volume expansion ratio of 50 times in the mold, the continuous cell ratio was low and the number of closed cells was large, and the comparative example was not subjected to reheating treatment. The bending strength and the compressive strength of the foamed molded article are higher than those of the foamed molded article of 3. On the other hand, in the foam molded article of Comparative Example 1, since the continuous cell ratio is small and the number of independent bubbles is small, the bending strength and the compressive strength of the foamed molded article are low. Further, in the foamed molded article of Comparative Example 2, since the internal average cell diameter exceeds the range of the present invention, the foamed molded article has low bending strength and compressive strength. Further, the result of the fact that the foamed molded article of Comparative Example 3 is not subjected to the reheating treatment has an internal average cell diameter exceeding the range of the present invention, so that the foamed molded body has low bending strength and compressive strength. Further, in the foamed molded article of Comparative Example 4, since the internal average cell diameter exceeded the range of the present invention as a result of reheating treatment at a low temperature, the foamed molded article had low bending strength and compressive strength. Further, in the foamed molded article of Comparative Example 5, since the value of the average cell diameter/internal average cell diameter of the surface layer portion is outside the range of the present invention, the foamed molded article has low bending strength and compressive strength. 52 323480 201219468 . [Industrial Applicability] The expandable polystyrene resin particles of the present invention can be widely used for producing mechanical strength such as bending strength, compressive strength, and impact resistance; and excellent heat insulating properties and cushioning properties. A polystyrene resin foam molded body. Further, the polystyrene resin foam molded article of the present invention can be widely used for various purposes such as a heat insulating material or a cushioning material. [Brief Description of the Drawings] Fig. 1 is a configuration diagram showing an example of a manufacturing apparatus used for producing the expandable polystyrene resin particles of the present invention. [Description of main components] 1 Extruder (resin supply unit) 2 Mold 3 Raw material supply hopper 4 High pressure pump 5 Foaming agent supply port 6 Cutter 7 Cutting chamber 8 Sink 9 High pressure pump 10 Dewatering dryer for solid-liquid separation function 11 storage container 53 323480

Claims (1)

201219468 VII. Patent application range: 1 . An expandable polystyrene resin particle which is a foamable polystyrene resin particle containing a foaming agent in a polystyrene resin particle, and the foaming The polystyrene-based resin particles are heated to be foamed into a foamed particle state having a volume expansion ratio of 50 times, and have an internal average bubble diameter in the range of 35 to 140/zm, and an average bubble diameter in the surface layer portion. A bubble structure having a bubble diameter in the range of 80 to 1 · 20 and an open cell ratio of 1% or less. The expandable polystyrene-based resin particle according to the first aspect of the invention, wherein the foamed particles are expanded to a volume expansion ratio of X times, and the internal average cell diameter D1 of the expanded particles is represented by the following formula: (1) The internal average bubble diameter of the expanded particles converted to 50 times the volume expansion ratio satisfies the relationship of 35# claw SDig 14〇em, [Number 1] A = 3 2 The expandable polystyrene resin particles according to claim 1, wherein the inner average cell diameter is in the range of 40 to 120 # m. The foamable polystyrene-based resin according to the first aspect of the invention is in the range of 8% or less. The foaming polystyrene-based resin according to Item 1, wherein the average surface diameter/internal average bubble diameter of the surface layer is 1 323480 .201219468 is in the range of 0.90 to 1.10. 6. The expandable polystyrene-based resin particles 'where' is contained in an amount of 5. 〇 by mass or less based on 100 parts by mass of the polystyrene-based resin. 7. The expandable polystyrene resin particles according to claim 6, wherein the inorganic bubble nucleating agent is talc. A method for producing a hairy 'encapsulated polyethylene-based resin particle, comprising: adding a foaming agent to a polystyrene resin in a resin supply device and kneading the molten resin containing the foaming agent from the resin supply device The small hole of the mold provided at the tip end of the resin supply device is extruded in a cooling liquid that does not reach the glass transition temperature Tg of the expandable polystyrene resin particles, and the extrudate is cut while being extruded. And the step of cooling and solidifying the extrudate by contact with the liquid for the cold portion to obtain the foamable polystyrene resin particles; and - the foaming property of the expandable polystyrene resin particles obtained The glass transition temperature τ of the polystyrene-based resin particles is heated to obtain the step of the expandable polystyrene-based resin particles as described in the "Patent Application No.". 9. The hair of the eighth item of claim 4 (4) The temperature of the cooling liquid when the above-mentioned extrudate is cut is in the range of 20 to 6 ° C in the case of the foamed polystyrene resin tweezers. Expandable polystyrene The olefinic resin succinct &amp; method 'in which 'the mass of the polystyrene resin particle 100 read 'adds 5.Q f parts to τ of the inorganic bubble nucleating agent. 323480 2 .201219468 = 〇 The method of the foamable polystyrene resin, wherein the inorganic bubble core 12 is surrounded by = pre-expanded particles, and the foaming polystyrene tree moon 曰 particles described in the item It is obtained by heating and pre-foaming. 13: a polystyrene-based resin foam molded body, which is obtained by filling a mold of a molding die with a polystyrene (four) aliphatic foaming particle according to item 12 of the patent scope of the patent application; It is obtained by foam molding in a mold. 14. A polystyrene resin which is obtained by heating a foamed polystyrene resin particle containing a foaming agent in a styrene-polystyrene resin particle by foaming into a frequency The foamed particles are filled in a cavity of a molding die and heated to form a polystyrene resin foam molded body obtained by foam molding in a mold, and the expandable polystyrene resin particles are heated and foamed. The state of the pre-expanded particles having a volume expansion ratio of 50 times has an internal average bubble diameter in the range of 35 to 140/m, and the average bubble diameter/internal average bubble diameter in the surface layer is in the range of 〇. 80 to 丨.2〇. A bubble structure within the range and having an open cell ratio of 10% or less. 15. The polystyrene-based resin foamed molded article of the invention of claim 14, wherein the foamed foam is formed into an internal average bubble diameter of the preliminary foamed particles when the volume expansion ratio is X times. The internal average bubble diameter D2 of the preliminary expanded particles in which V is converted into a volume expansion ratio of 50 times by the following formula (2) satisfies the relationship of 35 // mS D2 S 140 // m, 3 323480 • · · (2) 201219468 [Number 2] 16. If you apply for a patent, it is inside. The polystyrene-based resin described in the above item 14 is foamed into the above-mentioned internal average cell diameter of 40 to 120/zm, and the polystyrene resin foamed in the above-mentioned patent application. In the open body, the above-mentioned continuous bubble rate is below 8%. The range of the range of the average of the surface of the surface of the surface of the polystyrene-based resin is shown in the range of 0.90 to 1.1. The polystyrene-based resin foamed product according to the above-mentioned item, wherein the inorganic foam nucleating agent is contained in an amount of not less than 5% by mass based on 100 parts by mass of the polystyrene resin. The polystyrene foaming foam according to claim 19, wherein the inorganic bubble nucleating agent is talc. (1) The heat insulating material is formed by the polystyrene-based resin foam molded body described in claim 14. A cushioning material formed by the polystyrene-based resin foam molded body according to claim 14 of the patent application. 23. A polystyrene-based resin foamed molded article obtained by filling a polystyrene-based resin-prepared expanded particle in a cavity of a molding die, heating the forming die by steam, and performing foam molding in the mold. 323480 4 .201219468 In the state of foam molding at the X-fold expansion ratio, the following bubble structure is formed: The internal average fluorine bubble diameter D3' of the foamed particles which are mutually fused in the foam molded body is less than or equal to The internal average cell diameter Da of the expanded beads in the foamed molded article in the above formula (3) is 50 times the foaming ratio, and satisfies the relationship of 35 # m' DaS 140 μm, and the surface layer portion of the expanded particles is averaged. The value of the bubble diameter/internal average bubble diameter is in the range of 〇.80 to 1.20. The continuous bubble ratio of the vertical foamed molded body is less than 1%, [3] D3 = x ^ 3 (3) 0 24. The heat insulating material is formed of the polystyrene resin foam molded body described in claim 23 of the patent application. A cushioning material which is formed by the polystyrene resin foam molded body described in claim 23 of the patent application. 26. A method for producing a polystyrene-based resin foam molded article, comprising: adding a foaming agent to a polystyrene-based resin and kneading it in a resin supply, and setting a molten tree containing the hair (four) The small hole of the cookware at the tip end of the resin supply device is extruded in a cooling liquid at a temperature less than the glass transition temperature Tg of the expandable polystyrene resin particles. The first step of obtaining the foamable polyphenylene-based resin particles by cooling and solidifying the extrudate by contact with the liquid for cooling; # obtaining the hair-like polystyrene-based resin particles in the foaming property The temperature at which the glass transition temperature of the polystyrene resin particles is Tg-5t or more is 5 323480 4 201219468 • The first step of obtaining the foamable polystyrene resin particles by heating; Next, the foaming polyphenylene obtained The galvanic resin particles are heated to produce an internal average bubble diameter D2 of the preliminary expanded particles having a volume expansion ratio of 50 times in accordance with the above formula (2) of claim 5 of the patent application range of 35 to 140 / / m Within the scope, The third step of the polystyrene-based resin-prepared expanded particles of the bubble structure having a value of the average cell diameter/internal average cell diameter in the range of 〇. 80 to h 2 且 and an open cell ratio of 10% or less; Next, the polystyrene-based resin pre-expanded particles are filled in a cavity of a molding die and heated to perform the fourth step of in-mold foam molding. 27. The method for producing a polystyrene-based resin foam molded article according to the above aspect of the invention, wherein the temperature of the cooling liquid when the extrudate is cut is in the range of 20 to 6 (TC). 28. The method for producing a polystyrene resin according to claim 26, wherein the inorganic particle core is added in an amount of 5.0 parts by mass or less based on 100 parts of the polystyrene resin. The method for producing a polystyrene-based resin foam molded article according to the invention of claim 28, wherein the inorganic bubble (four) is talc. 如. In the method for producing a polystyrene-based resin foam molded article, the polystyrene-based resin pre-expanded particles are filled in a cavity of a molding die and heated to be heated in a mold. Forming, thereby obtaining a heat insulating material. The polystyrene resin described in the patent application No. 26 I 发泡 is foamed into 323480 6 , 201219468 - a method for producing a body, wherein the above step 4 Vinyl resin Preparation of expanded particles filled in the mold and the mold vessel is heated, a mold for foam molding, thereby obtaining a cushion member. 7,323,480