GB936761A - Improvements in the treatment of cellulose products - Google Patents
Improvements in the treatment of cellulose productsInfo
- Publication number
- GB936761A GB936761A GB2278361A GB2278361A GB936761A GB 936761 A GB936761 A GB 936761A GB 2278361 A GB2278361 A GB 2278361A GB 2278361 A GB2278361 A GB 2278361A GB 936761 A GB936761 A GB 936761A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibres
- formaldehyde
- cellulose
- fabrics
- zinc sulphate
- 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
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/12—Aldehydes; Ketones
- D06M13/127—Mono-aldehydes, e.g. formaldehyde; Monoketones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/10—Crosslinking of cellulose
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
A modification of the parent Specification, in which cellulose fibres are reacted with formaldehyde, comprises drying and heating the fibres after impregnation with an aqueous liquid containing zinc sulphate and formaldehyde, the molecular ratio of zinc sulphate to formaldehyde being at least 1:17, and the proportion of zinc sulphate carried by the fibres at the time of drying and heating being at least 0,003 gram molecules per 100 grams of cellulose. The fibres may be of natural or regenerated cellulose, and may be in the form of staple fibre or continuous filaments of regenerated cellulose, optionally in "never-dried" state, paper or cardboard made from natural or regenerated cellulose, or woven, knitted or non-woven fabrics. The fabrics may consist wholly of cellulose, or partly of fibres of other types, e.g. cellulose acetate, polyamides such as nylon, polyesters such as polyethylene terephthalate, or polyacrylonitrile. Preferably, such fabrics contain at least 35% by weight of cellulose fibres. The cellulose fibres may have been dyed before reaction with formaldehyde. Fabrics treated show improved crease-resistance, reduced water-imbibition and improved dimensional stability without loss of tensile and tear strengths. Impregnation of the cellulose fibres with the aqueous solution of zinc sulphate and formaldehyde, optionally containing other solvents, e.g. methanol or ethanol, is desirably followed by squeezing and centrifuging so that the amount of formaldehyde carried by the fibres is 0,5 to 6% based on dry weight of fibre, so that after drying, e.g. at 30 DEG -110\s2., and heating, e.g. at 110 DEG -180\s2., the fibres contain 0,1 to 3% by weight of formaldehyde chemically bound to the cellulose. Following the heating stage, the treated fibres or fabrics may be washed with water, or water containing ammonia, urea or other substance which reacts with any unbound formaldehyde. The pH of the treating solution may be at least 5. In an example, never-dried viscose rayon staple fibre is soaked in an aqueous solution of zinc sulphate and formaldehyde with pH 5,5. The fibres, after centrifuging to 140% liquid content, are dried at 80\s2. and heated at 155\s2. for 6 minutes. Specification 878,655 also is referred to.ALSO:A modification of the parent Specification in which cellulose fibres are reacted with formaldehyde, comprises drying and heating the fibres after impregnation with an aqueous liquid containing zinc sulphate and formaldehyde, the molecular ratio of zinc sulphate to formaldehyde being at least 1:17, and the proportion of zinc sulphate carried by the fibres at the time of drying and heating being at least 0,003 gram molecules per 100 grams of cellulose. The fibres may be of natural or regenerated cellulose, and may be in the form of staple fibre or continuous filaments of regenerated cellulose, optionally in "never-dried" state, paper or cardboard made from natural or regenerated cellulose, or woven, knitted or non-woven fabrics. The fabrics may consist wholly of cellulose, or partly of fibres of other types, e.g. cellulose acetate, polyamides such as nylon, polyesters such as polyethylene terephthalate, or polyacrylonitrile. Preferably, such fabrics contain at least 35% by weight of cellulose fibres. The cellulose fibres may have been dyed before reaction with formaldehyde. Fabrics treated show improved crease-resistance, reduced water-inhibition and improved dimensional stability without loss of tensile and tear strengths. Impregnation of the cellulose fibres with the aqueous solution of zinc sulphate and formaldehyde, optionally containing other solvents, e.g. methanol or ethanol, is desirably followed by squeezing and centrifuging so that the amount of formaldehyde carried by the fibres is 0,5 to 6% based on dry weight of fibre, so that after drying, e.g. at 30 DEG -110 DEG C. and heating, e.g. at 110 DEG -180 DEG C., the fibres contain 0,1 to 3% by weight of formaldehyde chemically bound to the cellulose. Following the heating stage, the treated fibres or fabrics may be washed with water, or water containing ammonia, urea or other substance which reacts with any unbound formaldehyde. The pH of the treating solution may be at least 5. In an example, "never-dried" viscose rayon staple fibre is soaked in an aqueous solution of zinc sulphate and formaldehyde with pH5,5. The fibres, after centrifuging to 140% liquid content, are dried at 80 DEG C. and heated at 155 DEG C. for 6 minutes. Specification 878,655 also is referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3841860A | 1960-06-24 | 1960-06-24 | |
US10927261A | 1961-05-11 | 1961-05-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB936761A true GB936761A (en) | 1963-09-11 |
Family
ID=26715183
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2278361A Expired GB936761A (en) | 1960-06-24 | 1961-06-23 | Improvements in the treatment of cellulose products |
GB2278461A Expired GB982812A (en) | 1960-06-24 | 1961-06-23 | Process for improving the properties of paper |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2278461A Expired GB982812A (en) | 1960-06-24 | 1961-06-23 | Process for improving the properties of paper |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1260963B (en) |
GB (2) | GB936761A (en) |
-
1961
- 1961-06-22 DE DEC24419A patent/DE1260963B/en active Pending
- 1961-06-23 GB GB2278361A patent/GB936761A/en not_active Expired
- 1961-06-23 GB GB2278461A patent/GB982812A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB982812A (en) | 1965-02-10 |
DE1260963B (en) | 1968-02-08 |
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