GB1094267A - Improvements in the manufacture of porous bodies - Google Patents

Improvements in the manufacture of porous bodies

Info

Publication number
GB1094267A
GB1094267A GB4787163A GB4787163A GB1094267A GB 1094267 A GB1094267 A GB 1094267A GB 4787163 A GB4787163 A GB 4787163A GB 4787163 A GB4787163 A GB 4787163A GB 1094267 A GB1094267 A GB 1094267A
Authority
GB
United Kingdom
Prior art keywords
particles
die
regions
softening
heating
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
GB4787163A
Inventor
William Weeks Vincent
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.)
Doulton and Co Ltd
Original Assignee
Doulton and Co Ltd
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 Doulton and Co Ltd filed Critical Doulton and Co Ltd
Priority to GB4787163A priority Critical patent/GB1094267A/en
Publication of GB1094267A publication Critical patent/GB1094267A/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
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/02—Moulding by agglomerating
    • B29C67/04—Sintering
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B29C67/205—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising surface fusion, and bonding of particles to form voids, e.g. sintering
    • 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
    • C08J9/24—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by surface fusion and bonding of particles to form voids, e.g. sintering

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Production of a porous body by filling a die with small graded pieces or particles of a thermoplastic material, closing the die, and heating the closed die to a temperature sufficient to cause the pieces or particles to sinter together the distribution of heat being controlled so as to intensify the degree of softening of the particles in predetermined regions of the body to effect local strengthening of the body in those regions preferably so that the body is sealed locally against the passage of liquid or gas by intensifying the degree of softening in the regions to be sealed sufficiently to destroy the porosity of the body in those regions. The preferred thermoplastic material, polystyrene, can be used in the form of rods, spherical beads or crushed particles for which limits defining useful sizes are given. Specified regions of the products, e.g. tiles or conical tubes, may be rendered completely non-porous. The distribution of heat in a selected region may be controlled by decreasing the thickness of the die wall in that region, by a local increase in the output of the heating medium or by use of a longer period of heating time.
GB4787163A 1963-12-04 1963-12-04 Improvements in the manufacture of porous bodies Expired GB1094267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4787163A GB1094267A (en) 1963-12-04 1963-12-04 Improvements in the manufacture of porous bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4787163A GB1094267A (en) 1963-12-04 1963-12-04 Improvements in the manufacture of porous bodies

Publications (1)

Publication Number Publication Date
GB1094267A true GB1094267A (en) 1967-12-06

Family

ID=10446542

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4787163A Expired GB1094267A (en) 1963-12-04 1963-12-04 Improvements in the manufacture of porous bodies

Country Status (1)

Country Link
GB (1) GB1094267A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2203696A1 (en) * 1972-10-24 1974-05-17 Ici Ltd
DE4341146A1 (en) * 1993-12-02 1995-06-08 Siemens Ag Treatment of waste plastic, esp. plastic foam, for disposal
EP0857555A2 (en) * 1997-02-06 1998-08-12 ENICHEM S.p.A. Process for the preparation of manufactured products based on vinylaromatic polymers with a predominantly syndiotactic structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2203696A1 (en) * 1972-10-24 1974-05-17 Ici Ltd
DE4341146A1 (en) * 1993-12-02 1995-06-08 Siemens Ag Treatment of waste plastic, esp. plastic foam, for disposal
EP0857555A2 (en) * 1997-02-06 1998-08-12 ENICHEM S.p.A. Process for the preparation of manufactured products based on vinylaromatic polymers with a predominantly syndiotactic structure
EP0857555A3 (en) * 1997-02-06 1998-11-04 ENICHEM S.p.A. Process for the preparation of manufactured products based on vinylaromatic polymers with a predominantly syndiotactic structure
US6066280A (en) * 1997-02-06 2000-05-23 Enichem S.P.A. Process for the preparation of manufactured products based on vinylaromatic polymers with a predominantly syndiotactic structure

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