DE2904943C2 - Verfahren zum Verdichten von offenzelligem Polyurethan-Schaumstoff - Google Patents
Verfahren zum Verdichten von offenzelligem Polyurethan-SchaumstoffInfo
- Publication number
- DE2904943C2 DE2904943C2 DE19792904943 DE2904943A DE2904943C2 DE 2904943 C2 DE2904943 C2 DE 2904943C2 DE 19792904943 DE19792904943 DE 19792904943 DE 2904943 A DE2904943 A DE 2904943A DE 2904943 C2 DE2904943 C2 DE 2904943C2
- Authority
- DE
- Germany
- Prior art keywords
- foam
- gas
- process according
- temperature
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 38
- 229920005830 Polyurethane Foam Polymers 0.000 title claims description 13
- 239000011496 polyurethane foam Substances 0.000 title claims description 13
- 239000006260 foam Substances 0.000 claims description 47
- 238000007906 compression Methods 0.000 claims description 29
- 230000006835 compression Effects 0.000 claims description 28
- 210000002421 cell wall Anatomy 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 10
- 210000004027 cell Anatomy 0.000 description 6
- 238000005056 compaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87673678A | 1978-02-10 | 1978-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2904943A1 DE2904943A1 (de) | 1979-08-16 |
| DE2904943C2 true DE2904943C2 (de) | 1987-04-09 |
Family
ID=25368461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792904943 Expired DE2904943C2 (de) | 1978-02-10 | 1979-02-09 | Verfahren zum Verdichten von offenzelligem Polyurethan-Schaumstoff |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS54163969A (nl) |
| DE (1) | DE2904943C2 (nl) |
| GB (1) | GB2014168B (nl) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4041864A1 (de) * | 1990-12-27 | 1992-07-02 | Helmut Pelzer | Wiederverwertung duroplastischer polyurethanschaumteile |
Families Citing this family (6)
| 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 |
| JPS59199222A (ja) * | 1983-04-27 | 1984-11-12 | Sekisui Chem Co Ltd | 熱可塑性樹脂発泡体の製造方法およびその製造装置 |
| GB8912701D0 (en) * | 1989-06-02 | 1989-07-19 | Hyman Int Ltd | Production 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 |
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/ja active Pending
- 1979-02-09 DE DE19792904943 patent/DE2904943C2/de not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4041864A1 (de) * | 1990-12-27 | 1992-07-02 | Helmut Pelzer | Wiederverwertung duroplastischer polyurethanschaumteile |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2904943A1 (de) | 1979-08-16 |
| GB2014168A (en) | 1979-08-22 |
| JPS54163969A (en) | 1979-12-27 |
| GB2014168B (en) | 1982-07-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| AG | Has addition no. |
Ref country code: DE Ref document number: 2943859 Format of ref document f/p: P |
|
| D2 | Grant after examination | ||
| AG | Has addition no. |
Ref country code: DE Ref document number: 2943859 Format of ref document f/p: P |
|
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |