GB2014168A - Method of densifying open-celled polyurethane material - Google Patents
Method of densifying open-celled polyurethane materialInfo
- Publication number
- GB2014168A GB2014168A GB7904451A GB7904451A GB2014168A GB 2014168 A GB2014168 A GB 2014168A GB 7904451 A GB7904451 A GB 7904451A GB 7904451 A GB7904451 A GB 7904451A GB 2014168 A GB2014168 A GB 2014168A
- Authority
- GB
- United Kingdom
- Prior art keywords
- densifying
- open
- polyurethane material
- celled polyurethane
- mass
- 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.)
- Granted
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
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
- B29C44/5636—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching with the addition of heat
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
A method of densifying open- celled polyurethane foam is provided in which heated air is circulated through a mass of the foam so as to raise the temperature of the mass to between about 385 DEG F. and 450 DEG F. (195 DEG C. and 235 DEG C.), the mass is then compressed to a desired thickness while its temperature remains between 385 DEG F. and 450 DEG F. and it is then immediately permitted to cool.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87673678A | 1978-02-10 | 1978-02-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2014168A true GB2014168A (en) | 1979-08-22 |
GB2014168B GB2014168B (en) | 1982-07-21 |
Family
ID=25368461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7904451A Expired GB2014168B (en) | 1978-02-10 | 1979-02-08 | Method of desifying open-celled polyurethane material |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS54163969A (en) |
DE (1) | DE2904943C2 (en) |
GB (1) | GB2014168B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0124095A2 (en) * | 1983-04-27 | 1984-11-07 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Process and apparatus for producing thermoplastic resin foam |
US5171756A (en) * | 1991-07-31 | 1992-12-15 | Crain Industries, Inc. | Three stage cooling of porous materials |
US5401448A (en) * | 1989-06-02 | 1995-03-28 | Vertifoam International Limited | Controlled cooling of porous materials |
US5702652A (en) * | 1990-05-31 | 1997-12-30 | Crain Industries, Inc. | Controlled cooling of porous materials |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4260575A (en) * | 1979-11-05 | 1981-04-07 | Koss Corporation | Method for molding ear cushions |
JPS5695976A (en) * | 1979-12-28 | 1981-08-03 | Toray Silicone Co Ltd | Application of two_component silicone sealant |
DE4041864A1 (en) * | 1990-12-27 | 1992-07-02 | Helmut Pelzer | Reutilisation of thermoplastic polyurethane foam components - by heat compressing filled components below decomposition temp. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3475525A (en) * | 1966-09-22 | 1969-10-28 | Timothy V Peters | Process of reticulating polyurethane foams |
US3577519A (en) * | 1968-11-29 | 1971-05-04 | Olin Mathieson | Process for controlling the amount of densification in polyurethane foams and products produced thereby |
-
1979
- 1979-02-08 GB GB7904451A patent/GB2014168B/en not_active Expired
- 1979-02-08 JP JP1287179A patent/JPS54163969A/en active Pending
- 1979-02-09 DE DE19792904943 patent/DE2904943C2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0124095A2 (en) * | 1983-04-27 | 1984-11-07 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Process and apparatus for producing thermoplastic resin foam |
EP0124095A3 (en) * | 1983-04-27 | 1987-08-19 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Process and apparatus for producing thermoplastic resin foam |
US5401448A (en) * | 1989-06-02 | 1995-03-28 | Vertifoam International Limited | Controlled cooling of porous materials |
US5702652A (en) * | 1990-05-31 | 1997-12-30 | Crain Industries, Inc. | Controlled cooling of porous materials |
US5171756A (en) * | 1991-07-31 | 1992-12-15 | Crain Industries, Inc. | Three stage cooling of porous materials |
Also Published As
Publication number | Publication date |
---|---|
DE2904943C2 (en) | 1987-04-09 |
DE2904943A1 (en) | 1979-08-16 |
GB2014168B (en) | 1982-07-21 |
JPS54163969A (en) | 1979-12-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |