GB1183783A - Improvements in or relating to Ebonite. - Google Patents

Improvements in or relating to Ebonite.

Info

Publication number
GB1183783A
GB1183783A GB1078368A GB1078368A GB1183783A GB 1183783 A GB1183783 A GB 1183783A GB 1078368 A GB1078368 A GB 1078368A GB 1078368 A GB1078368 A GB 1078368A GB 1183783 A GB1183783 A GB 1183783A
Authority
GB
United Kingdom
Prior art keywords
ebonite
heated
rubber
mouldings
mould
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
GB1078368A
Inventor
Alan James Edge
William Herbert Jones
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.)
VOLCREPE Ltd
Original Assignee
VOLCREPE 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 VOLCREPE Ltd filed Critical VOLCREPE Ltd
Priority to GB1078368A priority Critical patent/GB1183783A/en
Priority to DE19691910992 priority patent/DE1910992C/en
Publication of GB1183783A publication Critical patent/GB1183783A/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
    • 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
    • B29C44/027—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 the foaming continuing or beginning when the mould is opened
    • 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

  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

1,183,783. Expanded cellular ebonite mouldings. VOLCREPE Ltd. 11 Feb., 1969 [6 March, 1968], No. 10783/68. Addition to 1,115,573. Heading B5A. Mouldings of expanded cellular ebonite are made by incorporating into a rubber composition a blowing agent which reacts above the vulcanizing temperature vulcanizing the composition in a mould at a temperature such that the blowing agent does not react, removing the moulded component from the mould and expanding the moulded component by heating uniformity over its surface area. The expanded moulding is then heated further to convert the rubber to ebonite. The blowing step is preferably performed in a heated bed of fluidized particles. Preferably the rubber composition, which may be natural or synthetic is moulded at 140‹ C., heated to expand for 3-5 minutes at 180-200‹ C. and heated for 2-3 hours at 150‹ C. to complete the conversion to ebonite. The vulcanized rubber moulding may be stored before or after foaming for subsequent conversion to ebonite.
GB1078368A 1968-03-06 1968-03-06 Improvements in or relating to Ebonite. Expired GB1183783A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1078368A GB1183783A (en) 1968-03-06 1968-03-06 Improvements in or relating to Ebonite.
DE19691910992 DE1910992C (en) 1968-03-06 1969-03-04 Process for the production of a closed foam rubber molded article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1078368A GB1183783A (en) 1968-03-06 1968-03-06 Improvements in or relating to Ebonite.

Publications (1)

Publication Number Publication Date
GB1183783A true GB1183783A (en) 1970-03-11

Family

ID=9974188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1078368A Expired GB1183783A (en) 1968-03-06 1968-03-06 Improvements in or relating to Ebonite.

Country Status (1)

Country Link
GB (1) GB1183783A (en)

Also Published As

Publication number Publication date
DE1910992B2 (en) 1973-01-18
DE1910992A1 (en) 1969-12-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees