GB728869A - Manufacture of sponge rubber articles - Google Patents
Manufacture of sponge rubber articlesInfo
- Publication number
- GB728869A GB728869A GB11523/53A GB1152353A GB728869A GB 728869 A GB728869 A GB 728869A GB 11523/53 A GB11523/53 A GB 11523/53A GB 1152353 A GB1152353 A GB 1152353A GB 728869 A GB728869 A GB 728869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- colloid
- cellulose
- metal
- coated
- 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
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
- B29C44/005—Avoiding skin formation; Making foams with porous surfaces
-
- 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)
Abstract
A porous skin is obtained on the surface of a sponge rubber article by coating the surface of a mould with a non-surface-active water-soluble hydrophilic colloid material suspended in a vehicle and then moulding natural or synthetic latex foam against the coated surface: a part only of the mould surface may be thus coated. The colloid may be an alkali metal polyacrylate, e.g. sodium polyacrylate; a carboxalkyl cellulose, e.g. carboxy-methyl cellulose; a cellulose ether, e.g. methyl cellulose; polyvinyl alcohl; a water soluble protein, e.g. gelatine or casein; or a watersoluble vegetable mucilage, e.g. sodium or ammonium alginate or locust bean gum. The colloid may be applied to the mould surface as an aqueous solution of 0.1-10 per cent concentration and allowed to dry, at least partially, before the latex foam is put into the mould. The mould may be a closed metal mould, a flat metal pan or a metal conveyer having side ledges. The latex may be gelled or coagulated by chemical means, e.g. a coagulating gas, or by freezing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US728869XA | 1952-04-26 | 1952-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB728869A true GB728869A (en) | 1955-04-27 |
Family
ID=22110342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11523/53A Expired GB728869A (en) | 1952-04-26 | 1953-04-27 | Manufacture of sponge rubber articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB728869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2262468A (en) * | 1991-12-19 | 1993-06-23 | Yad Hygiene Products Limited | Moulding polymeric articles having a biocidally active surface |
-
1953
- 1953-04-27 GB GB11523/53A patent/GB728869A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2262468A (en) * | 1991-12-19 | 1993-06-23 | Yad Hygiene Products Limited | Moulding polymeric articles having a biocidally active surface |
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