http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-697322-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6eaf3bfb056852ae3463d2645e44ed13 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C71-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29D7-00 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C71-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29D7-00 |
| filingDate | 1950-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2098e5ba369fc50d085caa3dc8deea93 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7cee35cc1ddf47dbf0e050f91fa590fb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bc1b00b0b56967dc473897a9248be6ae |
| publicationDate | 1953-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-697322-A |
| titleOfInvention | Improvements in or relating to the production of films of hygroscopic, non-fibrous, organic material |
| abstract | Two or more coated films of hygroscopic, non-fibrous, organic material, of the type which normally develops when immersed in water an electric charge of negative sign, are produced in a machine, which differs from the normal type used for the production of a single film in that it is provided with two or more extrusion slits but, like the machine of the normal type, has only one set of drying rolls in the drying oven, by applying to the films after their formation, at least on those surfaces which are subsequently to be brought into contact, a liquid aqueous dispersion of wax, the wax particles of which carry, as a result of previous treatment to reverse the sign of the electric charge normally developed by the films or developed by the wax particles of the liquid aqueous wax dispersion (when made with the aid of an anionic surface-active agent), an electric charge of opposite sign to that developed by the films in contact with water. The treated films are then assembled and superimposed and passed through the drier while in surface contact with one another as if they were a single composite or multilayered film, whereafter the dried films are separated. The term "wax" is defined as in Specification 695,555 and the wax dispersions, which may contain colloidal silica and (or) alumina, may be prepared as described in that Specification, which relates to the coating of single films in the same manner as in the present Specification. In an example, two films of gel regenerated cellulose are cast simultaneously and passed simultaneously, while separated from each other, through a liquid aqueous bath containing glycerol, dispersed paraffin wax (blended with carnauba wax), colloidal silica and cetyl trimethyl ammonium bromide. Excess liquid is removed from the surfaces of the films by passage through squeeze rolls and the treated films are then assembled and superimposed and dried by passage in intimate contact with one another over drying rolls heated to 85-90 DEG C. The dried films separate easily from each other at the exit from the drying oven. Examples are given also of the simultaneous production of coated regenerated cellulose films in a similar manner using the other wax dispersions described in Specification 695,555. Specifications 386,775, 423,365, 657,342 and 673,255, and U.S.A. Specification 2,206,046 also are referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1080299-B |
| priorityDate | 1950-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.