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 fibres

Info

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
Application number
GB1757842A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tootal Broadhurst Lee Co Ltd
Original Assignee
Tootal Broadhurst Lee Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tootal Broadhurst Lee Co Ltd filed Critical Tootal Broadhurst Lee Co Ltd
Priority to GB1757842A priority Critical patent/GB564583A/en
Publication of GB564583A publication Critical patent/GB564583A/en
Expired legal-status Critical Current

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

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.
GB1757842A 1942-12-10 1942-12-10 Improvements in and relating to the parchmentisation and vulcanisation of cellulose fibres Expired GB564583A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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