CN102741333A - Foamable thermoplastic resin particles and method for producing same - Google Patents
Foamable thermoplastic resin particles and method for producing same Download PDFInfo
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- CN102741333A CN102741333A CN2010800627215A CN201080062721A CN102741333A CN 102741333 A CN102741333 A CN 102741333A CN 2010800627215 A CN2010800627215 A CN 2010800627215A CN 201080062721 A CN201080062721 A CN 201080062721A CN 102741333 A CN102741333 A CN 102741333A
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- thermoplastic resin
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- lathering property
- resin particle
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/582—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3461—Making or treating expandable particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0027—Cutting off
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92971—Fluids, e.g. for temperature control or of environment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
- B29K2105/048—Expandable particles, beads or granules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/22—Thermoplastic resins
Abstract
Disclosed is a method for producing foamable thermoplastic resin particles whereby foamable thermoplastic resin particles are obtained by the hot-cutting method while controlling the temperature (T1) of a resin containing a foaming agent in a granulation die and the temperature (T2) of the granulation die so as to satisfy the requirement T1>T2, and controlling the ratio (L1/L2) of the flow rate (L1) of a cooling medium to the discharge rate (L2) of the foaming agent-containing resin, said resin being discharged from a nozzle, within a range of 100-200.
Description
Technical field
The present invention relates to a kind of method of manufacture of method of manufacture, foaming of thermoplastic resin particulate method of manufacture and foaming of thermoplastic resin formed body of the lathering property thermoplastic resin particle that utilizes thermal cutting manufactured lathering property thermoplastic resin particle.
The present invention requires based on the Japanese special right of priority of being willing to 2009-271985 number of on November 30th, 2009 in japanese publication its content to be introduced in this specification sheets.
Background technology
In the past, made the technology of lathering property thermoplastic resin particle, for example proposed disclosed technology in the patent documentation 1 ~ 4 about utilizing thermal cutting method (be also referred to as in patterning method in the water, the water thermal cutting method etc.).
In patent documentation 1; A kind of method that molecular weight Mw surpasses the foamed styrene polymkeric substance of 170000g/ mole of making is disclosed; Wherein, The whipping agent styrene polymer melts that contains that will have at least 120 ℃ temperature is situated between by having the mould outlet aperture to be that the decking in the hole below the 1.5mm is carried, then extrudate to be made the particulate method.In this patent documentation 1, about molten resin temperature and die temperature, what paragraph [0021] was put down in writing is that " decking is heated to the temperature that contains whipping agent PS melts at least.The temperature of preferred decking is in than contains high 20 ~ 100 ℃ scope of temperature of whipping agent PS melts ".
In patent documentation 2; A kind of method of manufacture of lathering property thermoplastic resin particle is disclosed; The whipping agent molten resin that contains utilizing that rotary knife cutter will extrude from mould cuts off and makes the method for manufacture of lathering property thermoplastic resin particle of resin particle; Use the heat insulation mould in surface, and to be contactless state configuration rotary knife cutter with die surface.In this patent documentation 2, about molten resin temperature and die temperature, record is to make molten resin temperature and die temperature be 130 ℃ among the embodiment 1, and what in embodiment 2 and comparative example 1, put down in writing is that to make die temperature be 140 ℃.
In patent documentation 3, a kind of cut-out prilling of polymkeric substance, the lathering property particulate method of manufacture of thermoplastic polymer that the particulate processing under cooling is all carried out under the high pressure more than the 2Bar are disclosed.The method of manufacture of this patent documentation 3 possesses following operation: the operation that whipping agent compounding polymkeric substance is extruded from die section; The particulate that polymkeric substance is cut off immediately, obtains at the die head place takes out and cooling is all remaining on the operation of carrying out in pyritous water-bath or the fluid more than the Tg value of expandable polymer; The particle that obtains is carried out the series-operation of slow refrigerative operation at least+5 ℃ with in the TR at least-5 ℃ of this Tg value in the Tg of expandable polymer value.
In this patent documentation 3, about molten resin temperature and die temperature, in embodiment 1, only to have put down in writing and make resin temperature be about 160 ℃ purport, die temperature is record not.
In patent documentation 4; A kind of method of manufacture of lathering property thermoplastic resin particle is disclosed; Said method is with thermoplastic resin (A) and whipping agent (B) melting mixing (operation 1); Its extrusion cavities from die head is ejected in the heating and pressurizing liquid of the temperature, pressure that the melting mixing thing of heating and pressurizing to thermoplastic resin (A) and whipping agent (B) do not foam and instant cut off (operation 2); The resin particle that obtains is depressed and further heating (operation 3) in the presence of dispersion agent and/or tensio-active agent adding, then, cooled off, remove and press and take out (operation 4).In this patent documentation 4, about molten resin temperature and die temperature, only put down in writing the purport that makes resin temperature " is 150 ℃ " in front of mold in the embodiment 1, die temperature is record not.
The prior art document
Patent documentation
Patent documentation 1: Japan special table 2005-534733 communique
Patent documentation 2: japanese kokai publication hei 6-312726 communique
Patent documentation 3: japanese kokai publication sho 59-221340 communique
Patent documentation 4: japanese kokai publication hei 9-221562 communique
Summary of the invention
The problem that invention will solve
There is following problem in above-mentioned patent documentation 1 ~ 4 disclosed prior art.
In the method for manufacture of patent documentation 1 record, so that the die temperature mode also higher than molten resin temperature set.Yet under this condition, the resin particle of in water, extruding, and then being cut from the mould aperture merges (2 above resin particles melt the state that has glued each other) easily.Therefore, there is the fabrication yield variation of lathering property thermoplastic resin particle and be difficult to make the problem of high-quality lathering property thermoplastic resin particle and so on.
In the method for manufacture of patent documentation 2 records, have to make molten resin temperature and die temperature be all 130 ℃ example.Yet, actual when carrying out the manufacturing of lathering property thermoplastic resin particle under this temperature condition, can cause mould aperture (nozzle) to stop up at short notice, percentage of open area descends, and makes efficient and extremely worsens.In addition, exist the particle diameter of the lathering property thermoplastic resin particle that obtains to become the big problem that is difficult to make high-quality lathering property thermoplastic resin particle and so on that waits.
In the method for manufacture of patent documentation 3 and patent documentation 4 records, though molten resin temperature is on the books, for not record of die temperature, the prior art problems whether above-mentioned patent documentation 1,2 can take place is unclear.Yet; In the method for manufacture of patent documentation 3 and patent documentation 4 records; After molten resin being carried out in the water cutting, carried out the resin particle that obtains is slowly cooled off (patent documentation 3), maybe the resin particle that obtains is being added depresses and under dispersion agent and/or tensio-active agent, further heat operation afterwards such as (patent documentation 4) in the TR of the Tg of its resin value ± 5 ℃.In order to implement so back operation, can cause producing apparatus and maximize, manufacturing process increases and manufacturing cost increases.Therefore; Created conditions what the embodiment 1 of patent documentation 4 put down in writing; The lathering property thermoplastic resin particle that cutting in the water is obtained does not carry out above-mentioned " operation 3 " and is cooled with circulating water under the situation that reclaims resin particle; Distinguish that the lathering property thermoplastic resin particle that obtains is flats, is difficult to obtain the globular resin particle.
The present invention accomplishes in view of said circumstances; Its purpose is; Provide a kind of in the manufacturing of the lathering property thermoplastic resin particle that utilizes the thermal cutting method; The fusion of the resin particle that obtains is few, can utilize simple producing apparatus and operation to make the method for spherical and high-quality lathering property thermoplastic resin particle efficiently.
The scheme that is used to deal with problems
To achieve these goals, in the present invention, the technology below adopting.That is,
(1) the present invention is the method for manufacture of lathering property thermoplastic resin particle, and it is the method for manufacture with lathering property thermoplastic resin particle of following operation:
Thermoplastic resin supplied to granulation is installed with the resin feedway of mould and the operation of melting mixing;
On one side said thermoplastic resin is moved with mould to said granulation, in said thermoplastic resin inject whipping agent and form the operation that contain whipping agent resin on one side;
Utilize cutting machine heat-eliminating medium, to cut off, obtain the operation of lathering property thermoplastic resin particle from perforate in said granulation with the said whipping agent resin that contains of the ejection of the nozzle on the resin ejection face of mould,
Wherein, So that said granulation uses the said temperature T 1 that contains the whipping agent resin in the mould to use the temperature T 2 of mould to be T1 with said granulation>the flow L1 of T2 and said heat-eliminating medium controlling with the said mode of ratio (L1/L2) in 100 ~ 200 scope that contains the spray volume L2 of whipping agent resin that sprays from said nozzle, obtains the lathering property thermoplastic resin particle.
(2) in the method for manufacture of above-mentioned (1) described lathering property thermoplastic resin particle, utilize the pressure of the heat-eliminating medium that cutting machine will be when said nozzle ejection said contains the whipping agent resin and heat-eliminating medium, cut off to be preferably more than the 0.5MPa.
(3) in the method for manufacture of above-mentioned (1) or (2) described lathering property thermoplastic resin particle, the temperature of utilizing the heat-eliminating medium that cutting machine will be when said nozzle ejection said contains the whipping agent resin and heat-eliminating medium, cut off is preferably in 30 ~ 90 ℃ scope.
(4) in the method for manufacture of the described lathering property thermoplastic resin particle in above-mentioned (1) ~ (3), said thermoplastic resin is a polystyrene resin, said granulation with the said temperature T 1 that contains the whipping agent resin in the mould preferably in 150 ~ 230 ℃ scope.
(5) in the method for manufacture of the described lathering property thermoplastic resin particle in above-mentioned (1) ~ (4); The mixture ratio of the preferred so that fusion particle in the lathering property thermoplastic resin particle that obtains (wherein, merge particle and be meant that 2 above resin particles melt the particle of the state that has glued each other) is that the mode below the 1 quality % is set said temperature T 1, T2 and ratio (L1/L2).
(6) in addition, the present invention provides a kind of lathering property thermoplastic resin particle, and it is to utilize the method for manufacture of the described lathering property thermoplastic resin particle in above-mentioned (1) ~ (5) to obtain.
(7) and then; The present invention provides a kind of lathering property thermoplastic resin particle; It utilizes the thermal cutting method to make, and the mixture ratio that merges particle (wherein, merge particle and be meant that 2 above resin particles melt the particle of the state that has glued each other) is below the 1 quality %.
(8) and then, the present invention provides a kind of foaming of thermoplastic resin particulate method of manufacture, wherein, above-mentioned (6) or (7) described lathering property thermoplastic resin particle heated makes its pre-frothing, obtains the foaming of thermoplastic resin particle.
(9) and then, the present invention provides a kind of foaming of thermoplastic resin particle, it utilizes above-mentioned (8) described foaming of thermoplastic resin particulate method of manufacture and obtains.
(10) and then, the present invention provides a kind of method of manufacture of foaming of thermoplastic resin formed body, wherein, above-mentioned (9) described foaming of thermoplastic resin particle is carried out foaming in the mould, thereby obtain the foaming of thermoplastic resin formed body.
(11) and then, the present invention provides a kind of foaming of thermoplastic resin formed body, it is to utilize the method for manufacture of above-mentioned (10) described foaming of thermoplastic resin formed body to obtain.
The effect of invention
For method of manufacture of the present invention; In the manufacturing of the lathering property thermoplastic resin particle that utilizes the thermal cutting method; So that granulation uses the said temperature T 1 that contains the whipping agent resin in the mould to use the temperature T 2 of mould to be T1 with said granulation>the flow L1 of T2 and said heat-eliminating medium controlling with the said mode of ratio (L1/L2) in 100 ~ 200 scope that contains the spray volume L2 of whipping agent resin that sprays from said nozzle, obtains the lathering property thermoplastic resin particle.Thus, compare with the method for manufacture in the past that makes T1≤T2, the fusion of the resin particle that obtains is few, can utilize simple producing apparatus and operation to make spherical and high-quality lathering property thermoplastic resin particle efficiently.
Description of drawings
Fig. 1 is the pie graph that utilizes the prilling granulator of embodiment of the present invention.
Fig. 2 is that expression utilizes the sectional side view of the granulation of embodiment of the present invention with the summary formation of mould.
Fig. 3 is the side elevational view that the resin of the die main body of presentation graphs 2 sprays face.
Fig. 4 is the figure of an example of the configuration status of expression nozzle.
Embodiment
Below, with reference to accompanying drawing embodiment of the present invention is described.
Fig. 1 and Fig. 2 are the pie graphs of an example of the prilling granulator that uses in the method for manufacture of the present invention of expression; Fig. 2 is the sectional side view of its granulation of expression with an example of mould; Fig. 3 is the side elevational view that the resin of the die main body of presentation graphs 2 sprays face, and Fig. 4 is the figure of the configuration status of expression nozzle.
Like Fig. 1 and shown in Figure 2, the prilling granulator 100 that utilizes this embodiment is the prilling granulators that are used to utilize thermal cutting manufactured lathering property thermoplastic resin particle.
This prilling granulator 100 possesses: front end be equipped with granulation with the forcing machine 2 (resin feedway) of mould 1 be used for taking in the cutting machine 3 that cuts off with the resin of nozzle 15 ejections of mould 1 (at this embodiment for containing whipping agent resin 20) by granulation and make granulation spray the chamber 4 that face 13 contacts with current with the resin of mould 1.In chamber 4, connecting heat-eliminating mediums such as being used to make round-robin water (below be recited as water) mobile pipeline 5, an end of this pipeline 5 (upstream side of chamber 4) is situated between and is connected with tank 7 by conveying pump 6.In addition, at the other end (downstream side of chamber 4) of pipeline 5, be provided with the processed portion 8 that from recirculated water, separates the lathering property thermoplastic resin particle and dehydrate.Be sent in the container 9 at these processed portion 8 lathering property thermoplastic resin particles separated and that carried out dehydrating.And symbol 21 is hoppers, the 22nd, whipping agent supplying opening, the 23rd, HPP.
Need to prove that prilling granulator 100 and granulation be with in the mould 1, be " the place ahead ", " front end ", be " rear ", " rear end ", in following explanation, unify use with its opposition side with resin ejection side.
Like Fig. 2 and shown in Figure 3; Granulation is made up of die main body 10 (being also referred to as decking (die plate)) and the die holder 11 that is fixed on the front (right side among the figure) of forcing machine 2 with mould 1, and die main body 10 is fixed on the front of die holder 11 by a plurality of bolts 12.
Die holder 11 is set to be communicated with the barrel (cylinder) of forcing machine 2, from distolateral forward rear end side stream 11a, the front stream 11b of being formed with successively of rear end side.In die main body 10, the face central part is formed with the rearward side-prominent coniform protuberance 10a that forms in its back-end.Under die main body 10 and state that die holder 11 is connected, in the front stream 11b of die holder 11, be inserted with coniform protuberance 10a with specified gap.Therefore, whipping agent resin 20 side face along coniform protuberance 10a in front stream 11a that contains of the rear end side stream 11a through die holder 11 flows, and is communicated with a plurality of resin streams 14 (afterwards stating) of perforate in the aft end face of die main body 10.
Die main body 10 possesses: with the resin ejection face 13 of its front end face contact current; Spray a plurality of resin streams 14 that face 13 is transferred with the whipping agent resin 20 that contains that is used for extruding to resin from forcing machine 2; With the front end that is located at a plurality of resin streams 14 and perforate a plurality of nozzles 15 in resin ejection face 13; Lagging material 16 with the central position that is located at resin ejection face 13; With compare with resin ejection face 13 be positioned at forcing machine 2 sides be used to heat resin ejection face 13; The cartridge heater 17 of the front of resin stream 14; Short heater 18 with the rear end side that is used to heat resin stream 14.
In addition; As the means that are used for heating mould main body 10; Be not limited to heater air flow pressure switch rods such as cartridge heater 17 and short heater 18, also can form the stream that is connected with heat-transfer mediums such as deep fat, utilize warmed-up heat-transfer medium to come heating mould main body 10 in the inside of die main body 10.As heater means, can be the heating of only heater air flow pressure switch rod, the only heating of heat-transfer medium or the heating that heater air flow pressure switch rod and heat-transfer medium are used in combination.
The central part of the resin ejection face 13 of die main body 10 disposes the lagging material 16 of rounded section, is provided with the ejiction opening of a plurality of nozzles 15 along concentric(al) circles at the radial outside of its lagging material 16.The middle body of resin ejection face 13 that disposes lagging material 16 and a plurality of nozzle 15 4 innerly contacts with water in the chamber.
Each resin stream 14 is rounded section and extends along the direction perpendicular to resin ejection face 13, and is that the circumference (being depicted in the circumference on the resin ejection face 13) at center is vacated certain interval and disposed along the central axis with die main body 10.In this embodiment, a plurality of resin streams 14 are provided with 8 places, and the central angle between circumferential adjacent a plurality of resin streams 14 of said circumference is 45 °.And as stated, each resin stream 14 is communicated with the front stream 11b of die holder 11.
A plurality of nozzles 15 dispose with predetermined distance along the circumference that is depicted on the resin ejection face 13.As shown in Figure 4, for concrete place's nozzle 15, be formed on the nozzle unit (being referred to as in the present invention, " nozzle ") that disposes a plurality of single- nozzle 15a, 15b, 15c in the scope of cross-sectional shape of each resin stream 14 arbitrarily.The collocation method of each monomer nozzle 15a, 15b, 15c can adopt the many methods etc. of for example on a plurality of small circumferences, arranging, but is not limited to such distributing style.
And the resin that lagging material 16 is located at the inboard of the circumference that has disposed a plurality of nozzles 15 sprays on the face 13, so that the heat of die main body 10 is not distributed to the mode in the water in the chamber 4, the temperature that suppresses die main body 10 reduces.This lagging material 16 is preferably the lagging material of water tolerance, structure that surface hardness is high.For example; An example as lagging material 16; Can use cascade type; Contact the resistance toheat and the excellent lagging material of heat-proof quality that also can not deform etc. with pyritous die main body 10 even said cascade type is furnished with, and it is coated with the excellent waterproof resins such as fluoro-resin of heat-proof quality, and then spray face 13 sides at resin and stack gradually the high materials of surface hardness such as stainless steel, pottery.
In addition, cartridge heater 17 be located at resin ejection face 13 near, promptly from resin ejection face 13 in the scope of the predetermined heating degree of depth of forcing machine 2 sides.Here, heat penetration is meant the distance (symbol L shown in Figure 2) of central part that heats the cartridge heater 17 of usefulness from resin ejection face 13 to the surface.For heat penetration, in the scope of the machined surface that does not hinder mould, weather resistance, the effect of the more little inhibition nozzle obturation of its distance is big more, preferred more.That is, heat penetration is preferably the scope of 10 ~ 50mm.The machined surface that hinders mould, the anxiety of weather resistance are arranged when being lower than 10mm, have when surpassing 50mm and reduce the anxiety that suppresses the inaccessible effect of nozzle.Preferred scope is 15 ~ 30mm.
And then for the diameter of cartridge heater 17, in the scope that can guarantee the heat release capacity, its diameter sectional area of little tree fat stream more is big more, so nozzle number is many more, and is preferred more.That is, the diameter of cartridge heater 17 is preferably below the 15mm, is difficult to when being lower than 10mm guarantee that required heat release capacity and well heater are also expensive, therefore, is preferably 10mm ~ 15mm, more preferably 10mm ~ 12mm.
And; The length dimension of cartridge heater 17 is from arrived the position of the roughly periphery of die main body 10 to the position (that is, the leading section of cartridge heater 17 is positioned at central side than nozzle 15 at least) that central side extends by the nozzle 15 of the radial direction that is configured in die main body 10.
Relative each cartridge heater of short heater 18 17 is configured in rear side with predetermined distance, and the radical identical (8) of configuration radical and cartridge heater 17 has the function of the rear end side that heats resin stream 14.The length dimension of short heater 18 is shorter than cartridge heater 17.
In die holder 11, be provided with the temperature detectors such as thermopair (not shown) that are used to measure the temperature that contains whipping agent resin 20 that is pressed into from forcing machine 2 front ends.The position of this temperature detector is located at the position of the temperature that contains whipping agent resin 20 among the rear end side stream 11a that can measure die holder 11.Being the reason of position of the rear end side stream 11a of die holder 11 for the position that makes this temperature detector, is because the narrow cause that is difficult to measure resin temperature of stream of the nozzle 15 of the resin stream 14 of the front stream 11b of die holder 11, die main body 10 and die main body 10.In the present invention, the resin temperature settings of utilizing this temperature detector to measure is " granulation is with the said temperature T 1 that contains the whipping agent resin in the mould ".
In addition, in die main body 10, be provided with temperature detectors 19 such as thermopair (19A, 19B) (TP).That is,, cartridge heater 17 and short heater 18 are carried out on-off control respectively, can carry out temperature regulation die main body 10 based on the mensuration temperature of these temperature detectors 19.Through regulating the temperature of die main body 10, can regulate the resin temperature in the nozzle 15 of resin stream 14, die main body 10 of die main body 10.
The position of side temperature body 19 is located at the position of the temperature of removing the central part (8t/10) after rear end side (t/10) and the front (t/10) of the thickness t (symbol t shown in Figure 2) that can measure die main body 10.In the present embodiment, as shown in Figure 2, side temperature body 19 is located at 1/2 position of the thickness t of die main body 10.For removing the reason of the position after rear end side (t/10) and the front (t/10), is because be difficult to arrival in the heat of the position of rear end side and front well heater or heat-transfer medium for the position that makes temperature detector 19, does not represent the cause of the temperature of die main body 10.In addition, the front end of side temperature body 19 (Sensor section) is positioned near the resin stream 14 (with reference to Fig. 3) of die main body 10.In the present invention, the temperature of utilizing this temperature detector 19 to measure is set at " granulation is with the temperature T 2 of mould ".
Need to prove, under the situation of utilizing the bulk temperature that heat-transfer mediums such as deep fat can evenly temper die main body 10, can the temperature of heat-transfer medium be set at " granulation is with the temperature T 2 of mould ".
For the spray volume L2 that contains whipping agent resin 20 from nozzle 15 ejections; To be stored in the container 1 minute at processed portion 8 lathering property thermoplastic resin particles separated and that carried out dehydrating; Take out, utilize electronic balance to measure its quality, can obtain per 1 minute spray volume thus.The per 1 minute spray volume that obtains multiply by 60, can measure per 1 hour spray volume L2 thus.
Among Fig. 1, symbol S representes to be used for measuring this prilling granulator 100 as the water temperature of the recirculated water of heat-eliminating medium and the detecting means (sensing section) of pressure (hydraulic pressure).The water temperature of recirculated water and pressure can use known in the past thermometric pressure instrumentataion to measure.In addition, the water temperature of recirculated water well heater, the water cooler that is located at the appropriate location of recirculated water feed path capable of using controlled, and the pressure of the pressure (hydraulic pressure) and the water yield (the flow L1 of heat-eliminating medium) conveying pump 6 capable of using is set and controlled.
Method to making the lathering property thermoplastic resin particle with above-mentioned prilling granulator 100 describes.
The forcing machine 2 (resin feedway) that is used for prilling granulator shown in Figure 1 100 can suitably be selected to use from known in the past various forcing machines according to the kind of the resin that carries out granulation etc.; For example, use the forcing machine of screw rod or do not use the forcing machine of screw rod all can use.As the forcing machine that uses screw rod, for example, can enumerate single-screw forcing machine, multiscrew formula forcing machine, vented extruder, tandem forcing machine (tandem extruder) etc.As the forcing machine that does not use screw rod, for example, can enumerate plunger-type extruder (plunger extruder), gear pump type forcing machine (gear pump extruder) etc.In addition, any forcing machine can use static mixer.In these forcing machines, consider the preferred forcing machine that screw rod is arranged that uses from the viewpoint of productivity.The known in the past chamber of using in the thermal cutting method also can be used in the chamber 4 of in addition, taking in cutting machine 3.
In the present invention; Kind to thermoplastic resin is unqualified; As thermoplastic resin, for example, can polystyrene resin, polyethylene-based resin, polypropylene-based resin, polyester based resin, vinyl chloride-based resin, ABS resin, AS resin etc. be used separately or mixing use more than 2 kinds.And then also can use as rosin products and use the recovery resin that reclaims the thermoplastic resin that obtains later.Especially can use aptly as unbodied PS (GPPS), high-impact polystyrene polystyrene resins such as (HIPS).
Like Fig. 1 and shown in Figure 2, the prilling granulator of stating in the use 100 is made under the situation of lathering property thermoplastic resin particle, thermoplastic resin is supplied to front end from hopper 21 is equipped with the forcing machine 2 of granulation with mould 1, with its fusion and mixing.Then, Yi Bian thermoplastic resin is moved with mould 1 to granulation,, whipping agent and thermoplastic resin are mixed and form and contain whipping agent resin 20 Yi Bian utilize HPP 23 that whipping agent is pressed into this thermoplastic resin from whipping agent supplying opening 22.
Containing whipping agent resin 20 is sent to the resin stream 14 of granulation with the die main body 10 of mould 1 via die holder 11 from the front end of forcing machine 2.Each nozzle 15 ejection that contains whipping agent resin 20 resin ejection face 13 of 10 from perforate in die main body that transmit through resin stream 14, the rotating knife that (in the heat-eliminating medium) is cut machine 3 immediately in the current of chamber 4 cuts off.
For the present invention, said granulation uses the temperature T that contains whipping agent resin 20 1 in the mould 1 to use the temperature T 2 of mould 1 to be T1 with granulation>T2.And the present invention obtains the lathering property thermoplastic resin particle so that the flow L1 of said heat-eliminating medium is controlling with the mode of ratio (L1/L2) in 100 ~ 200 scope of the spray volume L2 that contains whipping agent resin 20 that sprays from said nozzle 15.
Said temperature T 1 can suitably be set according to the kind of the employed thermoplastic resin of granulation with T2.
For example, be under the situation of polystyrene resin at thermoplastic resin, T1 is preferably in 150 ~ 230 ℃ scope.The scope of the T1 of further preferred polystyrene resin is 160 ~ 220 ℃, most preferably is 170 ~ 210 ℃ scope.
In addition, be under the situation of polyethylene-based resin at thermoplastic resin, T1 is preferably in 130 ~ 210 ℃ scope.Further preferably polyethylene is that the scope of the T1 of resin is 140 ~ 200 ℃, most preferably is 150 ~ 190 ℃ scope.
In addition, be under the situation of polypropylene-based resin at thermoplastic resin, T1 is preferably in 180 ~ 270 ℃ scope.Further optimization polypropylene is that the scope of the T1 of resin is 190 ~ 260 ℃, most preferably is 200 ~ 250 ℃ scope.
In addition, in method of manufacture of the present invention, can use various thermoplastic resins, be polystyrene resin but most preferred resin is said thermoplastic resin.
In the present invention, the temperature T 2 through making mould (℃) than the temperature T that contains the whipping agent resin 1 (℃) lower, said T1 and T2 satisfy T1>relation of T2.Therefore, compare with the method for manufacture in the past of T1≤T2, the fusion of the resin particle that obtains is few, can utilize simple producing apparatus and operation, makes spherical and high-quality lathering property thermoplastic resin particle efficiently.
For T1 and T2, preferably satisfy T1-5 (℃) >=T2 (℃) relation, more preferably satisfy T1-10 (℃) >=T2 (℃) relation.
When said T1 and T2 are concerning of T1≤T2; Be extruded into the resin particle that the water, and then is cut from nozzle 15 and merge (2 above resin particles melt the state that has glued each other) easily; Therefore; The fabrication yield variation of lathering property thermoplastic resin particle, and be difficult to make high-quality lathering property thermoplastic resin particle.
In addition, when the temperature T that makes mould 2 (℃) cross be lower than the temperature T 1 that contains the whipping agent resin (℃) time, nozzle 15 stops up easily.Therefore, the percentage of open area of nozzle is reduced at short notice, the spray volume of the nozzle of per 1 opening increases, and the particle diameter of the lathering property thermoplastic resin particle that therefore obtains increases, the particle diameter deviation increases.Therefore, though not special restriction, satisfy T1 (℃)>T2 (℃) the condition of relation under, preferably satisfy T2 (℃)>T1-30 (℃) relation, more preferably satisfy T2 (℃)>T1-20 (℃) relation.
In addition, through making said ratio (L1/L2) in 100 ~ 200 scope, the fusion of the resin particle that obtains is few, and nozzle 15 is not easy to stop up.Its result can make high-quality lathering property thermoplastic resin particle efficiently.In addition, more preferably in 105 ~ 180 scope, the scope of most preferred ratio is 110 ~ 170 to the ratio of L1/L2.
When said ratio (L1/L2) when being lower than 100, the fusion of the resin particle that obtains increases, and is difficult to obtain spherical and high-quality lathering property thermoplastic resin particle.In addition, when said ratio (L1/L2) surpassed 200, nozzle 15 stopped up easily.Its result can make the percentage of open area of nozzle reduce at short notice, and the manufacturing efficient of prilling granulator 100 reduces.
In the method for manufacture of lathering property thermoplastic resin particle of the present invention; Utilize cutting machine to be preferably more than the 0.5MPa from the pressure that contains the recirculated water of whipping agent resin when the circulation underwater cutting of nozzle 15 ejection; The scope of 0.5 ~ 3.0MPa more preferably further is preferably the scope of 0.8 ~ 2.0MPa.
When this pressure was lower than 0.5MPa, the resin particle of well cutting was easy to generate foaming, was difficult to make high-quality lathering property thermoplastic resin particle.
In the method for manufacture of lathering property thermoplastic resin particle of the present invention, utilize cutting machine will from the temperature (water temperature) that contains the recirculated water of whipping agent resin 20 when the circulation underwater cutting of nozzle 15 ejection preferably in 30 ~ 90 ℃ scope, more preferably 40 ~ 80 ℃ scope, further be preferably 45 ~ 70 ℃ scope.
When said temperature was lower than 30 ℃, nozzle 15 stopped up easily.Its result, the percentage of open area of nozzle 15 can reduce at short notice, and the manufacturing efficient of prilling granulator 100 reduces easily.On the other hand, when said temperature surpassed 90 ℃, the resin particle of well cutting was easy to generate foaming, is difficult to make high-quality lathering property thermoplastic resin particle.
In the method for manufacture of lathering property thermoplastic resin particle of the present invention; The mixture ratio of the preferred so that fusion particle in the lathering property thermoplastic resin particle that obtains (wherein, merge particle and be meant that 2 above resin particles melt the particle of the state that has glued each other) is that the mode below the 1 quality % is set said temperature T1, T2 and ratio (L1/L2).Above-mentioned fusion particulate mixture ratio is few more good more, and preferably mixture ratio is zero situation.
This fusion particle is that 2 above resin particles melt the state that has glued each other, therefore, even apply some vibrations, impact and also do not separate.For this fusion particle, if the number multiform of the resin particle that merges becomes big particle, then can be through the resin particle screening with good article (independent resin particle) differentiation and separate.Yet, for 2 ~ 3 resin particles melt the more small-sized fusion particle that has glued, when resin particle sieves, might sneak in the good article through sieve.When said fusion particulate mixture ratio surpasses 1 quality %, using the lathering property thermoplastic resin particle to make under the situation of expanded moldings, can cause particles filled bad, the expanded moldings outward appearance deterioration that obtains of pre-frothing, physical strength reduction etc.
In chamber 4, being cut to granulous contains whipping agent resin 20 and becomes roughly spheric lathering property thermoplastic resin particle.This lathering property thermoplastic resin particle is carried in pipeline 5 along current, arrives processed portion 8.In processed portion 8, the lathering property thermoplastic resin particle separated from recirculated water and dehydrate, and the water that has separated is sent in the tank 7.Be sent in the container 9 and be incorporated in this container at these processed portion 8 lathering property thermoplastic resin particles separated and that carried out dehydrating.
Need to prove, to the not restriction of said whipping agent, for example, can be with pentane class, normal butane, Trimethylmethane, propane, CO such as Skellysolve A, iso-pentane, pentamethylene, neopentane, cyclopentadiene
2, N
2Deng use or mixing use more than 2 kinds separately.In addition, can be principal constituent also, with normal butane, Trimethylmethane, propane, CO with said pentane class
2, N
2Use Deng mixing.Especially pentane class, owing to suppress the granule foaming when nozzle is ejected to the current easily, so can use aptly.
In addition, the lathering property thermoplastic resin particle be instigate contain whipping agent in the thermoplastic resin and be shaped to granular, be preferably globular resin particle.This lathering property thermoplastic resin particle is to require the foamex moulding article of shape in order making and to use; Promptly; In freeboard, heat and pre-frothing, this pre-frothing particle is put into the die cavity of the forming mould of the die cavity with the shape that requires, carry out steam-heated cal(l)andria and that the pre-frothing particle is melted each other is sticking; Carry out the demoulding then, thereby make the foamex moulding article of the shape that requires.
For the present invention, in the manufacturing of the lathering property thermoplastic resin particle that utilizes the thermal cutting method to carry out, make granulation use the said temperature T 1 that contains the whipping agent resin in the mould to use the temperature T 2 of mould to be T1 with said granulation>T2.And in the method for manufacture of the present invention; So that the flow L1 of said heat-eliminating medium is controlling with the said mode of ratio (L1/L2) in 100 ~ 200 scope that contains the spray volume L2 of whipping agent resin that sprays from said nozzle, obtain the lathering property thermoplastic resin particle.Therefore, compare with the method for manufacture in the past of T1≤T2, the fusion of the resin particle that obtains is few, can utilize simple producing apparatus and operation to make spherical and high-quality lathering property thermoplastic resin particle efficiently.
Embodiment
[embodiment 1]
(manufacturing of foaming polystyrene series resin particle)
In forcing machine shown in Figure 12, installation plan 2 and the granulation that is made up of die holder 11 and die main body 10 shown in Figure 3 be with mould 1, manufacturing foaming polystyrene series resin particle.Use Fig. 2 and temperature detector 19 shown in Figure 3, all cartridge heaters 17 and short heater 18 are carried out on-off control, carry out the temperature regulation of granulation with the die main body 10 of mould 1.
As substrate resin; Will be in advance with drum mixer (tumble mixer) at polystyrene resin (TOYO STYRENE Co.; Ltd makes, trade(brand)name " HRM-10N ") uniform mixing talcum micro mist 0.3 mass parts forms in 100 mass parts mixture is supplied in the single screw extrusion machine of bore 90mm, makes the resin heating and melting.To as relative resin 100 mass parts of whipping agent be the iso-pentane of 6 mass parts in forcing machine way be pressed into thereafter.
Then, on one side in forcing machine mixing resin and whipping agent, on one side so that the temperature that contains whipping agent resin 20 in the die holder 11 is 195 ℃ a mode regulates.Then, make die main body 10 remain on 185 ℃ with cartridge heater 17 and short heater 18.Die main body 10 is provided with the nozzle of 200 diameter 0.6mm, flat part length (land length) 3.0mm.Whipping agent resin 20 Jie that contain of die holder 11 are carried by die main body 10, extrude in the cooling water circulation chamber 4 that 60 ℃ of water temperatures, hydraulic pressure 1.0MPa, the water yield (L1) 20000kg/hr are arranged.When this is extruded; Make along circumferential high speed rotating cutting machine driving fit on the resin ejection face 13 of die main body 10 with 10 cuttves; Change with PM 3000 and will contain whipping agent resin 20 and cut off and dehydrate, obtain spheric foamable polystyrene resin particle (below be designated as the lathering property resin particle).
The spray volume (L2) that contain whipping agent resin (lathering property resin particle) of beginning after 1 hour extruded in this operation is that the percentage of open area of 0.0726g, mould is 65% for the quality of 100 of 170kg/hr, dried lathering property resin particle.
The volume density of the lathering property resin particle that is obtained by this operation is 0.662g/cm
3, merge that proportion of particles is 0.08%, the particulate sphericity is 0.88.In addition, L1/L2 is 118.
With respect to lathering property resin particle 100 mass parts that obtain, polyoxyethylene glycol 0.03 mass parts, Zinic stearas 0.15 mass parts, glyceryl monostearate 0.05 mass parts, oxystearic acid triglyceride level 0.05 mass parts evenly are coated on the whole surface of lathering property resin particle.
(manufacturing of foam molded product)
The lathering property resin particle of making as stated being put into 15 ℃ refrigerator chamber, after placing 72 hours, be supplied in the round tube type intermittent type pre-frothing machine, is that the water vapour of 0.05MPa heats through being blown into pressure, obtains the pre-frothing particle.The pre-frothing particulate volume density that obtains is 0.015g/cm
3(60 times of volume foam expansion).
Then, the pre-frothing particle that obtains is in room temperature atmosphere held after 24 hours, particles filled in the forming mould of the OBL die cavity with long 400mm * wide 300mm * high 50mm with pre-frothing.Thereafter, with heating for 20 seconds in the die cavity of pressure to forming mould of water vapour with gauge pressure 0.08MPa., be cooled to the pressure die cavity of forming mould in reach 0.01MPa after, be opened into type die, take out the OBL expanded moldings of long 400mm * wide 300mm * high 50mm thereafter.The density of the expanded moldings that obtains is 0.015g/cm
3(60 times of foam expansion).
In the manufacturing of above-mentioned lathering property resin particle, pre-frothing particle and expanded moldings; For the sphericity of density foam expansion, percentage of open area, fusion proportion of particles and the lathering property resin particle of the volume density of lathering property resin particle, pre-frothing particulate volume density volume foam expansion, expanded moldings, under following condition, carry out evaluation of measuring.
< volume density of lathering property resin particle >
The lathering property resin particle that drying is good is filled in 500cm
3In the graduated cylinder, the bottomland that beats graduated cylinder carries out the filling of lathering property resin particle, until constant volume.Measure the volume and the quality of the lathering property resin particle of this moment, utilize following formula to calculate.Need to prove, with the 1cm of unit
3Read volume, use the electronic balance quality measurement of minimum scale as 0.01g.
Volume density (g/cm
3Volume (the cm of quality (the g)/lathering property resin particle of)=lathering property resin particle
3)
< pre-frothing particulate volume density volume foam expansion >
The about 5g pre-frothing of weighing particulate quality (a) g, and read to behind the radix point 2.Then, be 5cm in minimum scale unit
3500cm
3The load weighted pre-frothing particle of packing in the graduated cylinder will push tool and be against in the graduated cylinder.This extruding tool is to make a gesture of measuring the slightly little circular resin board in nozzle footpath, and its center uprightly is fixed with wide about 1.5cm, is about the bar-shaped resin board of 30cm.To push tool and be against in the graduated cylinder, read pre-frothing particulate volume (b) cm
3, utilize following formula to obtain pre-frothing particulate volume density and volume foam expansion.
Volume density (g/cm
3)=(a)/(b)
Volume foam expansion (doubly)=1/ volume density (g/cm
3)
< the density foam expansion of expanded moldings >
With 50cm
3More than (be 100cm under the situation of semi-rigid and soft material
3More than) test film cut off with the mode of the original foam structure that do not change material, measure its quality, utilize following formula to calculate.
Density (g/cm
3)=test film quality (g)/test film volume (cm
3)
The test film status adjustment, to measure with test film be through cutting the sample more than 72 hours and at 23 ℃ ± 2 ℃ * 50% ± 5% or 27 ℃ ± 2 ℃ * 65% ± 5% the test film of atmospheric condition held more than 16 hours after moulding.
In addition, the foam expansion of expanded moldings is the numerical value that utilizes computes to go out.
Foam expansion (doubly)=1/ density (g/cm
3)
< percentage of open area >
Begin through after 1 hour from the manufacturing of lathering property resin particle, the inspection mould calculates the percentage of open area of nozzle as follows.
Percentage of open area (the percentage of open area when jetting nozzle of die surface is extruded)=all nozzle number of number of aperture/mould * 100 (%)
The total mass of whole lathering property resin particles that spray volume (kg/hr)=per 1 hour cuts out with cutting machine
=number of aperture * cut out number * 1 quality
=number of aperture * cutting machine knife number * cutting machine revolution * 1 quality
Thereby number of aperture is:
Number of aperture=spray volume (kg/hr)/(cutting machine knife number * cutting machine revolution (rph) * 1 quality (kg/)
Therefore, percentage of open area can calculate with following formula.
Percentage of open area (E)=number of aperture/all nozzle number * 100 (%)
=(Q/ (N * R * 60 * (M/100)/1000))/H * 100 (%) is (in the formula; Q representes spray volume (kg/hr); N representes to cut the sheet number of machine knife, and R representes cutting machine revolution (rpm), and M representes that 100 quality (g) (choose any 100 from the lathering property resin particle; 100 quality measuring with the electronic balance of minimum scale 0.0001g), H representes all nozzle number of mould.）
< merging the particulate ratio >
The about 1g of lathering property resin particle with the accurate weighing of electronic balance is chosen arbitrarily obtains quality (W1).From wherein selecting the particle that fusion takes place more than 2, equally with the accurate weighing of electronic balance, obtain quality (W2), utilize following formula to calculate.
Merge particle rate=W2/W1 * 100 (%)
< merging the judgement criteria of particle rate >
Merging particle estimates in order to following standard.
Well: be lower than 0.5%
Good slightly: more than 0.5 and be lower than 1.0%
Bad: more than 1.0%
< lathering property particulate sphericity >
The lathering property resin particle of choosing arbitrarily is fixed on the self adhesive tape, and (SCHOLAR Co., Ltd makes: VMS-1000) its image is photographed with videomicroscopy.Reflect the minor axis (D1) and the major diameter (D2) of the lathering property resin particle on video monitor with vernier caliper measurement; Obtain the ratio of minor axis (D1)/major diameter (D2); Should operate 100 lathering property resin particles were measured, calculate MV as sphericity.
[embodiment 2]
Except making resin temperature is 200 ℃ (being 195 ℃) among the embodiment 1, operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[embodiment 3]
Except making resin temperature is that 200 ℃ (being 195 ℃) and die temperature are 195 ℃ (being 185 ℃) among the embodiment 1 among the embodiment 1, operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[embodiment 4]
Except making cyclic hydrostatic pressure is the 0.4MPa (being 1.0MPa among the embodiment 1), operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[embodiment 5]
Except making circulating water temperature is 30 ℃ (being 60 ℃) among the embodiment 1, operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[embodiment 6]
Except making quantity of circulating water L1 is that 18000kg/hr (being 20000kg/hr among the embodiment 1), ratio (L1/L2) are 106 (being 118 among the embodiment 1), operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[embodiment 7]
Except making quantity of circulating water L1 is that 30000kg/hr (being 20000kg/hr among the embodiment 1), ratio (L1/L2) are 176 (being 118 among the embodiment 1), operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[embodiment 8]
Except using polystyrene resin (TOYO STYRENE Co.; Ltd makes, trade(brand)name " HRM-10N ") hybrid resin of 50 mass parts and ldpe resin (Japan Polyethylene Corporation manufacturing, trade(brand)name " LC520 ") 50 mass parts is as beyond the substrate resin; Operate equally with embodiment 1, make the lathering property resin particle.
[embodiment 9]
Except use vinylbenzene methylacrylic acid copolymer resins (PSJ manufactured, trade(brand)name " G9001 ") 100 mass parts as substrate resin, to make resin temperature be that 220 ℃, die temperature are that 210 ℃ and circulating water temperature are 70 ℃; Operate equally with embodiment 1, make the lathering property resin particle.
[comparative example 1]
Except make resin temperature be 200 ℃ (among the embodiment 1 being 195 ℃) and die temperature be 210 ℃ (among the embodiment 1 being 185 ℃) (promptly; Be set at resin temperature the condition of die temperature) in addition; Operate equally with embodiment 1, make lathering property resin particle, pre-frothing particle and expanded moldings.
[comparative example 2]
Except making quantity of circulating water L1 is that 16000kg/hr (being 20000kg/hr among the embodiment 1), ratio (L1/L2) are 94 (being 118 among the embodiment 1), operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
[comparative example 3]
Except making quantity of circulating water L1 is that 35000kg/hr (being 20000kg/hr among the embodiment 1), ratio (L1/L2) are 206 (being 118 among the embodiment 1), operates equally with embodiment 1, makes lathering property resin particle, pre-frothing particle and expanded moldings.
The result of the foregoing description 1 ~ 9 gathered be recorded in table 1.And the result of said comparative example 1 ~ 3 gathered be recorded in table 2.
[table 1]
[table 2]
| Comparative example 1 | Comparative example 2 | Comparative example 3 | |||
| Resin temperature (T1) | °C | 200 | 195 | 195 | |
| Die temperature (T2) | °C | 210 | 185 | 185 | |
| Circulating water temperature | ℃ | 60 | 60 | 60 | |
| Cyclic hydrostatic pressure | MPa | 1.0 | 1.0 | 1.0 | |
| Quantity of circulating water (L1) | kg/hr | 20000 | 16000 | 35000 | |
| Resin spray volume (L2) | kg/hr | 170 | 170 | 170 | |
| L1/L2 | 118 | 94 | 206 | ||
| Merge the | ％ | 2 | 5 | 0.08 | |
| Volume density | g/cm3 | 0.634 | 0.652 | 0.638 | |
| Percentage of open area | ％ | 75 | 66 | 28 | |
| Sphericity | 0.92 | 0.88 | 0.76 |
Result according to table 1; In the manufacturing of the lathering property resin particle that utilizes the thermal cutting method; So that resin temperature T1 is T1 with die temperature T2>mode in the scope of ratio (L1/L2) 100 ~ 200 of T2 and quantity of circulating water L1 and resin spray volume L2 carrying out control and obtaining among the embodiment 1 ~ 9 of method of manufacture of the present invention of lathering property resin particle; Fusion proportion of particles in the lathering property resin particle that obtains is below 0.4%, and is less, good.
Can know in addition; So that circulating water temperature is 60 ℃ and quantity of circulating water (L1) and the ratio (L1/L2) of resin spray volume (L2) is among the embodiment 1 ~ 4,6 and 8 that sets of 118 or 106 mode; Sphericity is more than 0.87; Higher, and percentage of open area also is more than 65%, can stably make high-quality lathering property resin particle.
Be 30 ℃ embodiment 5, reach among the embodiment 7 that frequently other embodiment are high of L1/L2 at circulating water temperature, percentage of open area and proper sphere rate all descend.
And then, can know by embodiment 8, even use the hybrid resin of polystyrene resin and ldpe resin, the roughly the same result of resin that also can obtain Yu only form by polystyrene resin.In addition, can know,, compare except the perforate rate variance the roughly the same result of resin that also can obtain Yu only form with polystyrene resin by polystyrene resin even use vinylbenzene methylacrylic acid copolymer resins by embodiment 9.
On the other hand, in the comparative example 1 of the condition that is set at [resin temperature T1 < die temperature T2], compare with embodiment 1 ~ 8, the fusion proportion of particles in the lathering property resin particle that obtains is 2%, and is higher, bad.
In addition; The ratio (L1/L2) with quantity of circulating water (L1) and resin spray volume (L2) be set at 94 so that its be lower than in the comparative example 2 of lower limit (100) of the scope of ratio of the present invention; Fusion proportion of particles in the resulting lathering property resin particle is 5%, and is higher, bad.
And then; With the ratio (L1/L2) of quantity of circulating water (L1) and resin spray volume (L2) so that its mode of the upper limit (200) that surpasses the scope of ratio of the present invention be set in 206 the comparative example 3; The nozzle percentage of open area of mould drops to 28%, also step-down of sphericity, can not stably make high-quality lathering property resin particle.
Utilizability on the industry
For the purpose of the present invention; In the method for utilizing thermal cutting manufactured lathering property thermoplastic resin particle; The fusion of the resin particle that obtains is few; Utilize simple producing apparatus and operation can make spherical and high-quality lathering property thermoplastic resin particle effectively, wherein, said lathering property thermoplastic resin particle uses when making the expanded moldings of thermoplastic resins such as polystyrene resin, polyethylene-based resin.
The Reference numeral translation
Mould is used in 1 granulation
2 forcing machines (resin feedway)
3 cutting machines
10 die main bodies
11 die holders
13 resins ejection face
14 resin streams
15 nozzles
16 lagging materials
17 cartridge heaters
18 short heaters
19 temperature detectors
20 contain the whipping agent resin
100 prilling granulators
Claims (11)
1. the method for manufacture of a lathering property thermoplastic resin particle, it is the method for manufacture with lathering property thermoplastic resin particle of following operation:
Thermoplastic resin supplied to granulation is installed with the resin feedway of mould and the operation of melting mixing;
On one side said thermoplastic resin is moved with mould to said granulation, in said thermoplastic resin inject whipping agent and form the operation that contain whipping agent resin on one side;
Utilize cutting machine heat-eliminating medium, to cut off, obtain the operation of lathering property thermoplastic resin particle from perforate in said granulation with the said whipping agent resin that contains of the ejection of the nozzle on the resin ejection face of mould,
Wherein, So that said granulation uses the said temperature T 1 that contains the whipping agent resin in the mould to use the temperature T 2 of mould to be T1 with said granulation>the flow L1 of T2 and said heat-eliminating medium is that the mode of L1/L2 in 100 ~ 200 scope controlled with the said ratio that contains the spray volume L2 of whipping agent resin that sprays from said nozzle, obtains the lathering property thermoplastic resin particle.
2. the method for manufacture of lathering property thermoplastic resin particle according to claim 1, wherein, the pressure that utilizes the heat-eliminating medium that cutting machine will be when said nozzle ejection said contains the whipping agent resin and heat-eliminating medium, cut off is for more than the 0.5MPa.
3. the method for manufacture of lathering property thermoplastic resin particle according to claim 1 and 2, wherein, the temperature of utilizing the heat-eliminating medium that cutting machine will be when said nozzle ejection said contains the whipping agent resin and heat-eliminating medium, cut off is in 30 ~ 90 ℃ scope.
4. according to the method for manufacture of each the described lathering property thermoplastic resin particle in the claim 1 ~ 3; Wherein, Said thermoplastic resin is a polystyrene resin, said granulation with the said temperature T 1 that contains the whipping agent resin in the mould in 150 ~ 230 ℃ scope.
5. according to the method for manufacture of each the described lathering property thermoplastic resin particle in the claim 1 ~ 4; Wherein, So that being mode below the 1 quality %, the fusion particulate mixture ratio in the lathering property thermoplastic resin particle that obtains sets said temperature T 1, T2 and ratio L1/L2; Wherein, merge particle and be meant that 2 above resin particles melt the particle of the state that has glued each other.
6. lathering property thermoplastic resin particle, it is to utilize the method for manufacture of each the described lathering property thermoplastic resin particle in the claim 1 ~ 5 to obtain.
7. lathering property thermoplastic resin particle, it utilizes the thermal cutting method to make, and it is below the 1 quality % that 2 above resin particles melt the particulate mixture ratio that has glued each other.
8. foaming of thermoplastic resin particulate method of manufacture wherein, heats claim 6 or 7 described lathering property thermoplastic resin particles and to make its pre-frothing, obtains the foaming of thermoplastic resin particle.
9. foaming of thermoplastic resin particle, it utilizes the described foaming of thermoplastic resin particulate of claim 8 method of manufacture to obtain.
10. the method for manufacture of a foaming of thermoplastic resin formed body wherein, is carried out foaming in the mould with the described foaming of thermoplastic resin particle of claim 9, thereby is obtained the foaming of thermoplastic resin formed body.
11. a foaming of thermoplastic resin formed body, it is to utilize the method for manufacture of the described foaming of thermoplastic resin formed body of claim 10 to obtain.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-271985 | 2009-11-30 | ||
| JP2009271985 | 2009-11-30 | ||
| PCT/JP2010/071344 WO2011065561A1 (en) | 2009-11-30 | 2010-11-30 | Foamable thermoplastic resin particles and method for producing same |
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| Publication Number | Publication Date |
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| CN102741333A true CN102741333A (en) | 2012-10-17 |
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| CN2010800627215A Pending CN102741333A (en) | 2009-11-30 | 2010-11-30 | Foamable thermoplastic resin particles and method for producing same |
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| JP (1) | JPWO2011065561A1 (en) |
| CN (1) | CN102741333A (en) |
| TW (1) | TW201127889A (en) |
| WO (1) | WO2011065561A1 (en) |
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| JP6043562B2 (en) * | 2012-09-27 | 2016-12-14 | 積水化成品工業株式会社 | Method for producing thermoplastic resin particles, method for producing foamable thermoplastic resin particles, method for producing pre-foamed particles, and method for producing foamed molded article |
| JP7231691B2 (en) * | 2017-03-03 | 2023-03-01 | 株式会社カネカ | Method for producing expandable thermoplastic resin particles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344757A (en) * | 2000-09-20 | 2002-04-17 | 住友化学工业株式会社 | Method for production of thermoplastic elastomer powder |
| WO2008102874A1 (en) * | 2007-02-23 | 2008-08-28 | Sekisui Plastics Co., Ltd. | Granulating die, granulating apparatus, and process for producing expandable thermoplastic resin grain |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07110497B2 (en) * | 1989-08-30 | 1995-11-29 | 三菱電機ホーム機器株式会社 | Method for producing porous structure using thermoplastic resin material |
| JP2742188B2 (en) * | 1992-11-26 | 1998-04-22 | 積水化成品工業株式会社 | Granulator for thermoplastic resin |
| JP2002166417A (en) * | 2000-09-20 | 2002-06-11 | Sumitomo Chem Co Ltd | Method for manufacturing powder of thermoplastic elastomer composition |
| JP4674989B2 (en) * | 2001-04-13 | 2011-04-20 | 旭化成ケミカルズ株式会社 | Kneading method with good physical properties |
| TWI457379B (en) * | 2008-01-30 | 2014-10-21 | Sekisui Plastics | Expandable polystyrene type resin particle and production method thereof, and molded form |
| JP5101358B2 (en) * | 2008-03-24 | 2012-12-19 | 株式会社カネカ | Method for producing pre-expanded styrene-modified polyethylene resin particles, styrene-modified polyethylene resin pre-expanded particles obtained from the production method, and styrene-modified polyethylene resin foam molded article |
| JP5086900B2 (en) * | 2008-06-04 | 2012-11-28 | 積水化成品工業株式会社 | Method for producing foamable thermoplastic resin particles, method for producing thermoplastic resin foamed particles, and method for producing thermoplastic resin foam molded article |
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2010
- 2010-11-29 TW TW099141171A patent/TW201127889A/en unknown
- 2010-11-30 JP JP2011543361A patent/JPWO2011065561A1/en active Pending
- 2010-11-30 CN CN2010800627215A patent/CN102741333A/en active Pending
- 2010-11-30 WO PCT/JP2010/071344 patent/WO2011065561A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344757A (en) * | 2000-09-20 | 2002-04-17 | 住友化学工业株式会社 | Method for production of thermoplastic elastomer powder |
| WO2008102874A1 (en) * | 2007-02-23 | 2008-08-28 | Sekisui Plastics Co., Ltd. | Granulating die, granulating apparatus, and process for producing expandable thermoplastic resin grain |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2011065561A1 (en) | 2013-04-18 |
| TW201127889A (en) | 2011-08-16 |
| WO2011065561A1 (en) | 2011-06-03 |
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Application publication date: 20121017 |