JPS57199635A - Method of pre-foaming foamable thermoplastic resin particle - Google Patents

Method of pre-foaming foamable thermoplastic resin particle

Info

Publication number
JPS57199635A
JPS57199635A JP56084110A JP8411081A JPS57199635A JP S57199635 A JPS57199635 A JP S57199635A JP 56084110 A JP56084110 A JP 56084110A JP 8411081 A JP8411081 A JP 8411081A JP S57199635 A JPS57199635 A JP S57199635A
Authority
JP
Japan
Prior art keywords
tank
pressure
heating medium
thermoplastic resin
foamable thermoplastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56084110A
Other languages
Japanese (ja)
Other versions
JPS6210165B2 (en
Inventor
Toshio Sugawara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Kaseihin Kogyo KK
Sekisui Kasei Co Ltd
Original Assignee
Sekisui Plastics Co Ltd
Sekisui Kaseihin Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Plastics Co Ltd, Sekisui Kaseihin Kogyo KK filed Critical Sekisui Plastics Co Ltd
Priority to JP56084110A priority Critical patent/JPS57199635A/en
Publication of JPS57199635A publication Critical patent/JPS57199635A/en
Publication of JPS6210165B2 publication Critical patent/JPS6210165B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

PURPOSE:To obtain highly foamed particles with a stable magnification, by charging foamable thermoplastic resin particles into a foaming tank, and repeating the feeding and stopping of a heating medium such that the internal pressure in the tank fluctuates between predetermined upper and lower limits until the surface of the resin layer in the tank reaches a prescribed level. CONSTITUTION:While a certain quantity of foamable thermoplastic resin particles contained in the foaming tank 1 are stirred by a stirrer 2, the heating medium 6 is fed into the tank 1 to raise the pressure in the tank 1. When the pressure 5 reaches an upper limit, a supply valve 62 is closed to stop the supply of the heating medium 6. When the pressure in the tank falls to a lower limit, the supply valve 62 is opened again so that the heating medium 6 is fed to raise the pressure. While this procesure being are repeated, a particles quickly foam and therefore the resin particles surface in the tank 1 rises. When the top surface is detected by a detector 8, the repeating procedure of the supply and stopping of the heating medium is terminated, and the discharge vale 63 is opened so that the pressure in the tank becomes the atmospheric pressure. Thus, highly foamed particles with a stable magnification can be obtained.
JP56084110A 1981-06-01 1981-06-01 Method of pre-foaming foamable thermoplastic resin particle Granted JPS57199635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56084110A JPS57199635A (en) 1981-06-01 1981-06-01 Method of pre-foaming foamable thermoplastic resin particle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084110A JPS57199635A (en) 1981-06-01 1981-06-01 Method of pre-foaming foamable thermoplastic resin particle

Publications (2)

Publication Number Publication Date
JPS57199635A true JPS57199635A (en) 1982-12-07
JPS6210165B2 JPS6210165B2 (en) 1987-03-04

Family

ID=13821377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084110A Granted JPS57199635A (en) 1981-06-01 1981-06-01 Method of pre-foaming foamable thermoplastic resin particle

Country Status (1)

Country Link
JP (1) JPS57199635A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02251409A (en) * 1989-03-27 1990-10-09 Kanegafuchi Chem Ind Co Ltd Method of prefoaming thermoplastic synthetic resin particle
JP2011213900A (en) * 2010-03-31 2011-10-27 Sekisui Plastics Co Ltd Method for producing pre-foamed particle, pre-foamed particle and foamed molded product
CN108973000A (en) * 2018-10-19 2018-12-11 萍乡市集美环保新材料制造有限公司 Pre-foaming machine is used in a kind of preparation of foam backing plate

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155675A (en) * 1976-06-21 1977-12-24 Asahi Dow Ltd Process for expanding crosslinked polyolefin powder
JPS5625424A (en) * 1979-08-08 1981-03-11 Hitachi Chem Co Ltd Method and device for preliminary foaming

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155675A (en) * 1976-06-21 1977-12-24 Asahi Dow Ltd Process for expanding crosslinked polyolefin powder
JPS5625424A (en) * 1979-08-08 1981-03-11 Hitachi Chem Co Ltd Method and device for preliminary foaming

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02251409A (en) * 1989-03-27 1990-10-09 Kanegafuchi Chem Ind Co Ltd Method of prefoaming thermoplastic synthetic resin particle
JP2011213900A (en) * 2010-03-31 2011-10-27 Sekisui Plastics Co Ltd Method for producing pre-foamed particle, pre-foamed particle and foamed molded product
CN108973000A (en) * 2018-10-19 2018-12-11 萍乡市集美环保新材料制造有限公司 Pre-foaming machine is used in a kind of preparation of foam backing plate

Also Published As

Publication number Publication date
JPS6210165B2 (en) 1987-03-04

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