DK490877A - Fremgangsmaade til fremstilling af mikroporoese hulprofiler navnlig roer - Google Patents

Fremgangsmaade til fremstilling af mikroporoese hulprofiler navnlig roer

Info

Publication number
DK490877A
DK490877A DK490877A DK490877A DK490877A DK 490877 A DK490877 A DK 490877A DK 490877 A DK490877 A DK 490877A DK 490877 A DK490877 A DK 490877A DK 490877 A DK490877 A DK 490877A
Authority
DK
Denmark
Prior art keywords
procedure
making microporous
hole profiles
namely pipe
microporous hole
Prior art date
Application number
DK490877A
Other languages
Danish (da)
English (en)
Inventor
C Hentschel
W Bonin
J Mueller
B Rentz
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 DK490877A publication Critical patent/DK490877A/da

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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Molding Of Porous Articles (AREA)
DK490877A 1976-11-05 1977-11-04 Fremgangsmaade til fremstilling af mikroporoese hulprofiler navnlig roer DK490877A (da)

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
DK490877A true DK490877A (da) 1978-05-06

Family

ID=5992536

Family Applications (1)

Application Number Title Priority Date Filing Date
DK490877A DK490877A (da) 1976-11-05 1977-11-04 Fremgangsmaade til fremstilling af mikroporoese hulprofiler navnlig roer

Country Status (7)

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

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 (fr) * 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
NL7712094A (nl) 1978-05-09
ES463870A1 (es) 1978-07-01
SE7712439L (sv) 1978-05-06
FR2369919A1 (fr) 1978-06-02
BE860462A (fr) 1978-05-05
DE2650718A1 (de) 1978-05-11

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