KR970070067A - 열가소성수지발포체 및 그 제조방법 - Google Patents

열가소성수지발포체 및 그 제조방법 Download PDF

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KR970070067A
KR970070067A KR1019970012335A KR19970012335A KR970070067A KR 970070067 A KR970070067 A KR 970070067A KR 1019970012335 A KR1019970012335 A KR 1019970012335A KR 19970012335 A KR19970012335 A KR 19970012335A KR 970070067 A KR970070067 A KR 970070067A
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injection
thermoplastic resin
foam
plunger
blowing agent
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KR1019970012335A
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KR100200201B1 (ko
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시게오 니시카와
카오루 요리타
코오조 이치카와
하루오 이노우에
미찌오 에리구찌
타카노리 스에다
히데오 아메미야
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사토 아키오
미쯔이도오아쯔가가꾸 가부시기가이샤
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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
    • B29C44/3469—Cell or pore nucleation
    • B29C44/348—Cell or pore nucleation by regulating the temperature and/or the pressure, e.g. suppression of foaming until the pressure is rapidly decreased
    • 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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0415—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by regulating the pressure of the material during or after filling of the mould, e.g. by local venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • B29C44/421—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by plastizising the material into a shot cavity and injecting using a plunger
    • 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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/13—Cell size and distribution control while molding a foam

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

본 발명은, 표면외관이 양호하여 일체화된 미발포부분을 표층에 가지고, 미세한 평균셀직경으로 균일한 평균셀밀도의 셀을 가진 열가소성수지발포사출성형체의 제조방법과, 이 제조방법에 의해 제조되는 열가소성수지발포사출성형체의 제공을 과제로 한것이며, 그 해결수단으로서, 연속가소화장치(1)내에서, 열가소성수지 100중량부를 용융하고, 발포제인 초임계상태의 2산화탄소 및/또는 질소를 첨가하고, 열가소성수지의 상용상태를 형성하는 가스용해공정, 연속가소화장치(1)내에서, 발포제의 임계압력이상의 압력을 유지한 그대로 용융수지의 온도를 내리는 냉각공정, 사출장치(7)에 의한 계량사출공정, 및 금형(8)내에서, 발포제의 임계압력이상의 고압하로부터의 압력저하에 의해 셀핵을 발생시켜, 이 셀직경을 제어하는 발포 제어공정으로 이루어지고, 계량사출공정까지는, 발포제를 초임계상태로 유지하므로서 이루어지는, 열가소성수지발포사출성형체의 제조방법을 특징으로 한 것이며, 상기 발포체는, 내부층이 미세한 평균셀직경이고, 균일한 평균셀밀도의 발포부분과, 표층에 이 발포부분과 일체화된 미발포부분을 가지고, 표면외관이 양호하다.

Description

열가소성수지발포체 및 그 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (10)

  1. 내부층이 평균셀직경이 0.01~50㎛, 평균셀밀도가 108~1016개/㎠인 발포부분과, 표면층에 두께 10~1,000㎛의 이발포부분과 일체화한 미발포부분을 가진 것을 특징으로 하는 열가소성수지발포사출성형체.
  2. 제1항에 있어서, 평균셀직경이 0.01~20㎛, 평균셀밀도가 108~1016개/㎠인 것을 특징으로 하는 열가소성수지발포사출성형체.
  3. (Ⅰ) 발포제를 공급하는 라인을 가진 연속가소화장치(1)내에서, 100~450℃에서 열가소성수지 100중량부를 용융하고, 초임계상태의 2산화탄소 및/또는 질소를, 열가소성수지 100중량부를 용융하고, 초임계상태의 2산화탄소 및/또는 질소를, 열가소성수지 100중량부당 0.1~30중량부 첨가해서, 열가소성수지와 초임계상태의 2산화탄소 및/또는 질소의 상용상태의 용융수지조성물을 형성하는 가스용해공정, (Ⅱ) 연속가소화장치(1)내에서, 상기 2산화탄소 및/또는 질소의 임계압력이상의 압력을 유지한 그대로 이 용융수지조성물을 50~300℃의 온도로 내리는 냉각공정, (Ⅲ) 연속가소화장치(1)에 접속한 사출플런저(6)를 가진 사출장치(7)에 의해, 냉각한 이 용융수지조성물을 계량하고, 금형(8)내에 충전하는 계량사출공정, 및 (Ⅳ)금형(8)내의 압력을 2산화탄소 및/또는 질소의 상기 임계압력이하의 압력으로 저하하므로서 셀핵을 발생시키고, 이 셀직경을 제어하는 발포제어공정으로 이루어지고, 계량사출공정까지는, 2산화탄소 및/또는 질소의 초임계상태를 유지하고, 또한 연속가소화장치(1)에 의한 가스용해공정 및 냉각공정과 사출장치(7)에 의한 계량사출공정을 독립적으로 행하는 것을 특징으로 하는 청구항 1 또는 청구항 2에 기재된 열가소성수지발포사출성형체의 제조방법.
  4. 제3항에 있어서, 발포제를 공급하는 라인을 가진 연속가소화장치(1)와, 사출플런저(6)를 가진 사출장치(7)의 사이에, 개폐밸브(5)를 개재해서 사출장치(7)와 선택적으로 접속되는 이 연속가소화장치(1)의 유출로에 접속된, 혼합부를 가진 어댑터(2)를 설치하는 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
  5. 제3항에 있어서, 두께가 0.5~50㎜의 발포체가 제조가능한 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
  6. 제3항에 있어서, 두께가 10~50㎜의 발포체가 제조가능한 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
  7. 제3항에 있어서, 발포제어공정을, 용융수지조성물을 사출한 후에 금형(8)내에 충전한 고압가스의 탈가스 및/또는 금형(8)의 코어의 적어도 일부의 후퇴에서 행하는 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
  8. 제3항에 있어서, 열가소성수지에 또 정포제를 0.1~10중량부 첨가하는 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
  9. 제3항에 있어서, 발포제를 공급하는 라인을 가진 연속가소화장치(1)와, 사출플런저(6)를 가진 사출장치(7)의 사이에, 개폐밸브(5)를 개재해서 사출장치(7)와 선택적으로 접속되는, 플런저를 가진 수지어큠레이터장치(4)를 설치하는 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
  10. 제9항에 있어서, 혼합부를 가진 어댑터(2)와, 사출플런저(6)를 가진 사출장치(7)의 사이에, 개폐밸브(5)를 개재해서 사출장치(7)와 선택적으로 접속되는, 플런저를 가진 수지어큠레이터장치(4)를 설치하는 것을 특징으로 하는 열가소성수지발포사출성형체의 제조방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970012335A 1996-04-04 1997-04-03 열가소성수지발포체 및 그 제조방법 KR100200201B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP96-82493 1996-04-04
JP8249396 1996-04-04
JP33970296 1996-12-19
JP96-339702 1996-12-19

Publications (2)

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KR970070067A true KR970070067A (ko) 1997-11-07
KR100200201B1 KR100200201B1 (ko) 1999-06-15

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Country Status (7)

Country Link
US (1) US5997781A (ko)
EP (1) EP0799853B2 (ko)
KR (1) KR100200201B1 (ko)
CN (1) CN1104316C (ko)
DE (1) DE69724688T3 (ko)
MY (1) MY119010A (ko)
TW (1) TW438848B (ko)

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