GB925249A - Improvements in or relating to the manufacture of cellular materials - Google Patents
Improvements in or relating to the manufacture of cellular materialsInfo
- Publication number
- GB925249A GB925249A GB3492660A GB3492660A GB925249A GB 925249 A GB925249 A GB 925249A GB 3492660 A GB3492660 A GB 3492660A GB 3492660 A GB3492660 A GB 3492660A GB 925249 A GB925249 A GB 925249A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foam
- gas
- expansion
- compression
- soon
- 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
-
- 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
- C08J9/36—After-treatment
-
- 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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
A process for improving the physical properties of flexible polyurethane foam comprises compression of the foam to less than half its original volume followed by removal of the forces causing compression and expansion of the compressed foam to approximately its original dimensions, characterized in that the expansion takes place in an atmosphere of a gas to which the foam is chemically inert, the gas being maintained at a temperature of from 80 DEG F to 300 DEG F. Suitable gas is carbon dioxide, nitrogen, oxygen and hydrogen. In examples the process is effected by passing foam, soon after its preparation, through rollers and allowing it to expand in air at 100 DEG to 105 DEG F. and at 110 DEG F. respectively.ALSO:A process for improving the physical properties of flexible polyurethane foam comprises compression of the foam to less than half its original volume followed by removal of the forces causing compression and expansion of the compressed foam to approximately its original dimensions, characterised in that the expansion takes place in an atmosphere of a gas to which the foam is chemically inert, the gas being maintained at a temperature of from 80 DEG F. to 300 DEG F. Suitable gas is carbon dioxide, nitrogen, oxygen and hydrogen. In examples the process is effected by passing foam, soon after its preparation, through rollers and allowing it to expand in air at 100 DEG to 105 DEG F. and at 110 DEG F. respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3492660A GB925249A (en) | 1960-10-12 | 1960-10-12 | Improvements in or relating to the manufacture of cellular materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3492660A GB925249A (en) | 1960-10-12 | 1960-10-12 | Improvements in or relating to the manufacture of cellular materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB925249A true GB925249A (en) | 1963-05-01 |
Family
ID=10371639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3492660A Expired GB925249A (en) | 1960-10-12 | 1960-10-12 | Improvements in or relating to the manufacture of cellular materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB925249A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1959921A1 (en) * | 1968-11-29 | 1970-06-25 | Olin Corp | Compressed polyurethane foam and process for its manufacture |
| DE1924713A1 (en) * | 1968-11-29 | 1970-07-23 | Olin Mathieson | Process for the production of compressed flexible polyurethane foams and their use as cushioning material |
| FR2425454A1 (en) * | 1978-05-08 | 1979-12-07 | Prb Nv | PROCESS FOR MANUFACTURING POLYURIDE ALVEOLAR MATERIALS |
-
1960
- 1960-10-12 GB GB3492660A patent/GB925249A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1959921A1 (en) * | 1968-11-29 | 1970-06-25 | Olin Corp | Compressed polyurethane foam and process for its manufacture |
| DE1924713A1 (en) * | 1968-11-29 | 1970-07-23 | Olin Mathieson | Process for the production of compressed flexible polyurethane foams and their use as cushioning material |
| FR2425454A1 (en) * | 1978-05-08 | 1979-12-07 | Prb Nv | PROCESS FOR MANUFACTURING POLYURIDE ALVEOLAR MATERIALS |
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