ES463870A1 - Procedimiento para la obtencion de perfiles huecos micropo- rosos. - Google Patents

Procedimiento para la obtencion de perfiles huecos micropo- rosos.

Info

Publication number
ES463870A1
ES463870A1 ES463870A ES463870A ES463870A1 ES 463870 A1 ES463870 A1 ES 463870A1 ES 463870 A ES463870 A ES 463870A ES 463870 A ES463870 A ES 463870A ES 463870 A1 ES463870 A1 ES 463870A1
Authority
ES
Spain
Prior art keywords
extrusion
profiles
thermoplastics
relatively high
blowing agent
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.)
Expired
Application number
ES463870A
Other languages
English (en)
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of ES463870A1 publication Critical patent/ES463870A1/es
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B11/00—Drainage of soil, e.g. for agricultural purposes
    • E02B11/005—Drainage conduits
    • 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
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/507—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through an annular die
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B13/00—Irrigation ditches, i.e. gravity flow, open channel water distribution systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

Procedimiento para la obtención de perfiles huecos microporosos, especialmente tubos, para la alimentación y evacuación de materiales fluidos tales como gases ó líquidos, por extrusión de fusiones de material termoplástico que se han mezclado con materiales de material termoplástico que se han mezclado con materiales de propulsión, caracterizado porque a) a la fusión del material termoplástico se le agrega agente de propulsión en una cantidad de 1 al 5% del peso, referido a los materiales termoplástico.
ES463870A 1976-11-05 1977-11-04 Procedimiento para la obtencion de perfiles huecos micropo- rosos. Expired ES463870A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762650718 DE2650718A1 (de) 1976-11-05 1976-11-05 Verfahren zum herstellen von mikroporoesen hohlprofilen, insbesondere rohren, zum zu- und abfuehren von stroemenden stoffen wie gase oder fluessigkeiten

Publications (1)

Publication Number Publication Date
ES463870A1 true ES463870A1 (es) 1978-07-01

Family

ID=5992536

Family Applications (1)

Application Number Title Priority Date Filing Date
ES463870A Expired ES463870A1 (es) 1976-11-05 1977-11-04 Procedimiento para la obtencion de perfiles huecos micropo- rosos.

Country Status (7)

Country Link
BE (1) BE860462A (es)
DE (1) DE2650718A1 (es)
DK (1) DK490877A (es)
ES (1) ES463870A1 (es)
FR (1) FR2369919A1 (es)
NL (1) NL7712094A (es)
SE (1) SE7712439L (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3272913D1 (en) * 1981-10-22 1986-10-02 Ici Plc Production of pvc irrigation pipe
DE4325879C3 (de) * 1993-08-02 1999-05-20 Depron Bv Folie aus einem thermoplastischen Kunststoffschaum, Verfahren zu ihrer Herstellung sowie ihre Verwendung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807505A (en) * 1956-07-02 1957-09-24 Shuford Mills Soil soaking devices
DE1629423A1 (de) * 1966-04-02 1971-01-14 Gruenzweig & Hartmann Verfahren zur Herstellung von Kunstharz-Schaumstoffen und Verwendung eines nach diesem Verfahren gefertigten Rohres
US3502753A (en) * 1966-05-13 1970-03-24 Owens Illinois Inc Extruding foamed plastics
BE716366A (es) * 1967-06-22 1968-11-04
US3558753A (en) * 1967-11-13 1971-01-26 Int Plastics Method of producing a porous resin by withdrawing gas from a foam extrudate while it is in a semi-molten state

Also Published As

Publication number Publication date
FR2369919A1 (fr) 1978-06-02
NL7712094A (nl) 1978-05-09
BE860462A (fr) 1978-05-05
SE7712439L (sv) 1978-05-06
DK490877A (da) 1978-05-06
DE2650718A1 (de) 1978-05-11

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