CH222921A - Process for treating artificial sponges with a view to reducing their volume. - Google Patents
Process for treating artificial sponges with a view to reducing their volume.Info
- Publication number
- CH222921A CH222921A CH222921DA CH222921A CH 222921 A CH222921 A CH 222921A CH 222921D A CH222921D A CH 222921DA CH 222921 A CH222921 A CH 222921A
- Authority
- CH
- Switzerland
- Prior art keywords
- volume
- reducing
- view
- sponges
- treating artificial
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 5
- 239000002993 sponge (artificial) Substances 0.000 title claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Description
Procédé de traitement d'éponges artificielles en vue d'en diminuer le volume.
La présente invention se rapporte à un procédé de traitement d'éponges artificielles faites d'un dérivé de cellulose, tel que, par exemple, la viscose, en vue d'en diminuer le volume.
Les demandeurs ont fait l'observation que si de pareilles éponges sont soumises, après leur fabrication, à l'action de la chaleur et de pression mécanique dans une direction, leur épaisseur dans cette direction peut être considérablement réduite sans augmentation de leurs dimensions en direction transversale a ; la première. Des éponges ainsi traitées res- teront, dans des conditions normales, à leur état de compression pendant une période de temps illimitée, mais lorsqu'elles sont immergées dans l'eau, elles gonfleront rapidemeni jusqu'à ce qu'elles aient retrouvé leur épaisseur normale.
On comprend que le rétrécissement décrit en épaisseur est d'un avantage considérable au point de vue de l'empaquetage et du transport des éponges, et que ces éponges occupent aussi un espace relativement petit dans un magasin ou autre endroit d'emmagasinage.
Les pressions et les températures auxquelles les éponges sont soumises peuvent varier dans de larges limites, mais des résultats favorables on tété obtenus avec une pression d'environ 7,5 kg par cm2 et avec une tempé rature d'environ 90 C, l'épaisseur d'une éponge traitée dans ces conditions étant réduite depuis environ 27 mm à environ 3 mm.
I1 n'est pas nécessaire que les éponges soient enfermées dans des moules ou des boîtes pendant l'opération de pression.
Le temps pendant lequel la pression est appliquée varie suivant la température et la pression employées et suivant l'épaisseur primitive de l'éponge, mais dans les conditions de traitement envisagées plus haut, on a constaté qu'une période d'application de pression de 30 secondes donne des résultats satisfaisants.
Process for treating artificial sponges with a view to reducing their volume.
The present invention relates to a process for treating artificial sponges made from a cellulose derivative, such as, for example, viscose, with a view to reducing their volume.
Applicants have observed that if such sponges are subjected, after their manufacture, to the action of heat and mechanical pressure in one direction, their thickness in that direction can be considerably reduced without increasing their dimensions in the direction. transverse a; the first one. Sponges so treated will, under normal conditions, remain in their state of compression for an unlimited period of time, but when immersed in water they will swell rapidly until they have regained their thickness. normal.
It is understood that the disclosed shrinkage in thickness is of considerable advantage from the standpoint of packaging and transporting sponges, and that these sponges also occupy relatively small space in a store or other storage location.
The pressures and temperatures to which the sponges are subjected can vary within wide limits, but favorable results have been obtained with a pressure of about 7.5 kg per cm2 and with a temperature of about 90 C, the thickness of a sponge treated under these conditions being reduced from about 27 mm to about 3 mm.
It is not necessary for the sponges to be enclosed in molds or boxes during the pressing operation.
The time during which the pressure is applied varies according to the temperature and the pressure employed and according to the primitive thickness of the sponge, but under the treatment conditions envisaged above, it has been found that a period of application of pressure of 30 seconds gives satisfactory results.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB222921X | 1940-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH222921A true CH222921A (en) | 1942-08-15 |
Family
ID=10177014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH222921D CH222921A (en) | 1940-02-19 | 1941-04-07 | Process for treating artificial sponges with a view to reducing their volume. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH222921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE958997C (en) * | 1952-09-30 | 1957-02-28 | August Kettenbach | Method of packing sponges |
-
1941
- 1941-04-07 CH CH222921D patent/CH222921A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE958997C (en) * | 1952-09-30 | 1957-02-28 | August Kettenbach | Method of packing sponges |
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