GB564583A - Improvements in and relating to the parchmentisation and vulcanisation of cellulose fibres - Google Patents
Improvements in and relating to the parchmentisation and vulcanisation of cellulose fibresInfo
- Publication number
- GB564583A GB564583A GB1757842A GB1757842A GB564583A GB 564583 A GB564583 A GB 564583A GB 1757842 A GB1757842 A GB 1757842A GB 1757842 A GB1757842 A GB 1757842A GB 564583 A GB564583 A GB 564583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphuric acid
- acid
- sheets
- treated
- parchmentizing
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/65—Acid compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Paper (AREA)
Abstract
Cellulosic materials are pre-treated with sulphuric acid of less than parchmentizing strength and are then treated with sulphuric acid of parchmentizing strength without substantial solution of the cellulose. Treatment with the stronger acid may be continued until a product suitable for moulding is obtained. After the parchmentizing treatment, the acid may be removed by washing or by neutralization. The treated material may be pressed and dried so as to form a mass which is hard and light, is a good electrical insulator, and is capable of being moulded under heat and pressure. Cellulose fibres in the form of sheets of paper may be subjected to the acid treatment and then laminated and pressed together. Fibres, yarns, films, scoured sawdust, wood pulp, macerated paper, or knitted or woven cellulosic fabrics may be treated. In an example, several sheets of bleached or unbleached kraft paper are individually dipped in sulphuric acid of 90 DEG Tw. for a few minutes. Excess of liquid is then squeezed out and the sheets are dipped in sulphuric acid of 160 DEG Tw. for about 1 minute at room temperature. The sheets are washed and then laminated, pressed, and dried to form a hard mass capable of being moulded. Formaldehyde may be added to the strong sulphuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1757842A GB564583A (en) | 1942-12-10 | 1942-12-10 | Improvements in and relating to the parchmentisation and vulcanisation of cellulose fibres |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1757842A GB564583A (en) | 1942-12-10 | 1942-12-10 | Improvements in and relating to the parchmentisation and vulcanisation of cellulose fibres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB564583A true GB564583A (en) | 1944-10-04 |
Family
ID=10097630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1757842A Expired GB564583A (en) | 1942-12-10 | 1942-12-10 | Improvements in and relating to the parchmentisation and vulcanisation of cellulose fibres |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB564583A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1164222B (en) * | 1960-07-07 | 1964-02-27 | Serlachius Oy | Process for the production of parchment paper |
| DE2838799A1 (en) * | 1978-09-06 | 1980-03-13 | Dynamit Nobel Ag | VOLCANIC FIBER AND METHOD FOR THEIR PRODUCTION |
-
1942
- 1942-12-10 GB GB1757842A patent/GB564583A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1164222B (en) * | 1960-07-07 | 1964-02-27 | Serlachius Oy | Process for the production of parchment paper |
| DE2838799A1 (en) * | 1978-09-06 | 1980-03-13 | Dynamit Nobel Ag | VOLCANIC FIBER AND METHOD FOR THEIR PRODUCTION |
| FR2435556A1 (en) * | 1978-09-06 | 1980-04-04 | Dynamit Nobel Ag | VULCANIZED FIBER AND ITS VULCANIZATION METHOD |
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