GB732409A - Film casting surfaces - Google Patents
Film casting surfacesInfo
- Publication number
- GB732409A GB732409A GB12903/53A GB1290353A GB732409A GB 732409 A GB732409 A GB 732409A GB 12903/53 A GB12903/53 A GB 12903/53A GB 1290353 A GB1290353 A GB 1290353A GB 732409 A GB732409 A GB 732409A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- film
- coating
- acetate
- sodium
- 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
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
A smooth, hard, water-resistant film-casting surface is obtained by coating a film-casting support, e.g. an endless belt or a drum, with a substitution derivative of cellulose, converting the surface of the coating into regenerated cellulose and then treating the regenerated cellulose with a cross-linking agent therefor, e.g. a dialdehyde. Specified substitution derivatives of cellulose, which may be applied to the support as solutions in acetone, methylene chloride, acetone-alcohol, nitromethane, dioxane or benzene-methanol, are cellulose esters such as the nitrate, acetate, propionate, butyrate, acetatepropionate and acetate-butyrate and cellulose ethers such as ethyl cellulose. Superficial regeneration of the cellulose may be effected by treatment with sulphuric acid or ammonium hydrosulphide when the coating is cellulose nitrate, with sodium or potassium hydroxide when the coating is a carboxylic ester of cellulose, and with hydrochloric or hydriodic acid when the coating is a cellulose ether, and these reagents may be applied to the coating from aqueous or alcoholic solutions or, particularly when the support is a drum, they may be applied in a viscous dope containing an inert film-forming material to form a film upon the coating which film is subsequently stripped therefrom as described in Specification 693,717. Specified dialdehydes are glyoxal, succinaldehyde (in the form of its inner acetal, diethoxy tetrahydrofurane), a , g -dimethyl-a -methoxy-methyl-glutaraldehyde and a -hydroxy adipaldehyde. The dialdehydes may be applied to the regenerated cellulose surface from an aqueous medium containing, if desired, an acidic acetalization catalyst, such as oxalic, sulphuric, formic or p-toluene sulphonic acid, or they may be applied in a dope containing an inert film-forming material, e.g. cellulose acetate, cellulose propionate, sodium carboxy methyl cellulose, nitrocellulose, sodium cellulose sulphate or ethyl cellulose, to form a film upon the regenerated cellulose surface, which film is subsequently stripped therefrom. The cross-linking reaction is effected by a heat treatment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US732409XA | 1952-05-09 | 1952-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB732409A true GB732409A (en) | 1955-06-22 |
Family
ID=22112588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12903/53A Expired GB732409A (en) | 1952-05-09 | 1953-05-08 | Film casting surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB732409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116102755A (en) * | 2023-01-17 | 2023-05-12 | 深圳市百穗康实业有限公司 | Microporous cellulose membrane and preparation method thereof |
-
1953
- 1953-05-08 GB GB12903/53A patent/GB732409A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116102755A (en) * | 2023-01-17 | 2023-05-12 | 深圳市百穗康实业有限公司 | Microporous cellulose membrane and preparation method thereof |
| CN116102755B (en) * | 2023-01-17 | 2023-09-19 | 深圳市百穗康实业有限公司 | Microporous cellulose membrane and preparation method thereof |
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