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FR2134874A5 - Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges - Google Patents

Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges

Info

Publication number
FR2134874A5
FR2134874A5 FR7114483A FR7114483A FR2134874A5 FR 2134874 A5 FR2134874 A5 FR 2134874A5 FR 7114483 A FR7114483 A FR 7114483A FR 7114483 A FR7114483 A FR 7114483A FR 2134874 A5 FR2134874 A5 FR 2134874A5
Authority
FR
France
Prior art keywords
sodium sulphate
mfg
irregular
extrusion die
synthetic sponges
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
FR7114483A
Other languages
French (fr)
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.)
Novacel SA
Original Assignee
Novacel SA
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 Novacel SA filed Critical Novacel SA
Priority to FR7114483A priority Critical patent/FR2134874A5/en
Application granted granted Critical
Publication of FR2134874A5 publication Critical patent/FR2134874A5/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
    • B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material
    • B30B11/202—Ring constructions
    • 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
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Die for extrusion of crystalline materials such as sodium sulphate by radial extrusion between a stack of annular die plates and opt. spacers where one or both faces of each die plate is grooved with the profile or half profile of one of the required extrudate cross-sections. Particular reference to producing diced particles of extruded sodium sulphate for incorporation into blocks of regenerated cellulose to make synthetic sponges by subsequent aqueous leaching of the soluble sulphate. Much easier to produce a variety of profiles by machining surface channels than by boring to better reproduce the pore size distribution found in natural sponges.
FR7114483A 1971-04-23 1971-04-23 Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges Expired FR2134874A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7114483A FR2134874A5 (en) 1971-04-23 1971-04-23 Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7114483A FR2134874A5 (en) 1971-04-23 1971-04-23 Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges

Publications (1)

Publication Number Publication Date
FR2134874A5 true FR2134874A5 (en) 1972-12-08

Family

ID=9075808

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7114483A Expired FR2134874A5 (en) 1971-04-23 1971-04-23 Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges

Country Status (1)

Country Link
FR (1) FR2134874A5 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457685A (en) * 1982-01-04 1984-07-03 Mobil Oil Corporation Extrusion die for shaped extrudate
WO1992009525A1 (en) * 1990-11-28 1992-06-11 Harko B.V. Mould to be used for compacting pellets
EP0893517A2 (en) * 1997-07-23 1999-01-27 Anthony Fabbricante Micro-denier nonwoven materials made using modular die units

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457685A (en) * 1982-01-04 1984-07-03 Mobil Oil Corporation Extrusion die for shaped extrudate
WO1992009525A1 (en) * 1990-11-28 1992-06-11 Harko B.V. Mould to be used for compacting pellets
EP0893517A2 (en) * 1997-07-23 1999-01-27 Anthony Fabbricante Micro-denier nonwoven materials made using modular die units
EP0893517A3 (en) * 1997-07-23 1999-07-21 Anthony Fabbricante Micro-denier nonwoven materials made using modular die units

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Legal Events

Date Code Title Description
ST Notification of lapse