Method for producing a cellulose fibre from hydrocellulose
OwnerAchim Neumayr, Herbert Haslinventors
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Abstract
The invention described here concerns a process to permit the manufacture of a cellulose fibre from hydrate cellulose with an extremely large surface area which may be used for the preparation of a fabric characterized by a high absorptive power, good liquid-retention properties, high grease-solvent properties as well as particle-absorbing properties, which is suitable for making products that are themselves easy to clean, which can be used for cleaning and decontamination as well as to reduce the surface tension of water and which can be disposed of without damage to the environment.
Claims58
A process to manufacture a cellulose fibre having fibre-parallel lamellae with spacing between 1 nm and 5 μm from hydrate cellulose, the method comprising the following steps:
- a) selecting shoots no older than 1 year of deciduous trees or conifers;
- b) deriving wood pulp from the shoots;
- c) treating the wood pulp derived from shoots no older than 1 year of deciduous tees or conifers with an alkali metal hydroxide solution to obtain an alkali cellulose;
- d) pressing out superfluous alkali metal hydroxide solution from the alkali cellulose;
- e) shredding the alkali cellulose into alkali cellulose crumbs;
- f) ripening the alkali cellulose crumbs to a maturity of between 5° and 30° Hottenroth to form ripened crumbs;
- g) treating the ripened crumbs with a wet sulphide process to form sulphadised cellulose;
- h) rinsing and diluting of the sulphadised cellulose with water to obtain a spinning solution;
- i) ripening of the spinning solution to a maturity of between 5° and 30° Hottenroth;
- j) filtering and downstream deaerating the spinning solution;
- k) injecting the spinning solution into a regenerating bath under application of spinnerets;
- l) stripping the coagulating fibres off of the spinnerets with simultaneous twisting in order to obtain twisted fibres;
- m) dehydrating the twisted fibres;
- n) desulphurising the twisted fibres;
- o) washing the twisted fibres with water;
- p) predehydrating the twisted fibres;
- and
- q) drying the twisted fibres, whereby the fibres have fibre-parallel lamellae with spacing between 1 nm and 5 μm.
Fabric comprising a backing fabric and a pile woven into the backing fabric, wherein the pile is comprised of cellulose fibers formed by:
- a) treating wood pulp derived from shoots no older than 1 year of deciduous trees or conifers with an alkali metal hydroxide solution in order to obtain an alkali cellulose;
- b) pressing out the superfluous alkali metal hydroxide solution from the obtained alkali cellulose;
- c) shredding the alkali cellulose into crumbs;
- d) ripening the alkali cellulose crumbs to a maturity of between 5° and 30° Hottenroth;
- e) employing a wet sulfide process to treat the ripened crumbs in order to sulfadize the cellulose;
- f) rinsing and diluting the sulfadized cellulose with water in order to obtain a spinning solution;
- g) subsequenty ripening the rinsed and diluted cellulose to a maturity of between 5° and 30° Hottenroth;
- h) filtering and deaerating the spinning solution;
- i) injecting the spinning solution into a regenerating bath under application of spinnerets;
- j) stripping off the coagulating fibers with simultaneous twisting in order to obtain twisted fibers;
- k) dehydrating the twisted fibers;
- l) desulfurizing the twisted fibers;
- m) washing the twisted fibers with water;
- n) predehydrating the twisted fibers;
- and
- o) drying the twisted fibers;
- the fabric characterised in that the pile consists of 50% oval fibers and 50% tape fibers.
Fabric comprising a backing fabric and a pile woven into the backing fabric, wherein the pile is comprised of cellulose fibers formed by:
- a) treating wood pulp derived from shoots no older than 1 year of deciduous trees or conifers with an alkali metal hydroxide solution in order to obtain an alkali cellulose;
- b) pressing out the superfluous alkali metal hydroxide solution from the obtained alkali cellulose;
- c) shredding the alkali cellulose into crumbs;
- d) ripening the alkali cellulose crumbs to a maturity of between 5° and 30° Hottenroth;
- e) employing a wet sulfide process to treat the ripened crumbs in order to sulfadize the cellulose;
- f) rinsing and diluting the sulfadized cellulose with water in order to obtain a spinning solution;
- g) subsequently ripening the rinsed and diluted cellulose to a maturity of between 5° and 30° Hottenroth;
- h) filtering and deaerating the spinning solution;
- i) injecting the spinning solution into a regenerating bath under application of spinnerets;
- j) stripping off the coagulating fibers with simultaneous twisting in order to obtain twisted fibers;
- k) dehydrating the twisted fibers;
- l) desulfurizing the twisted fibers;
- m) washing the twisted fibers with water;
- n) predehydrating the twisted fibers;
- and
- o) drying the twisted fibers;
- the fabric characterized in that the pile consists of 50% of oval fibers with a count of 330 dtex F60 and 50% of tape fibers with a count of 300 dtex F80.
Dependencies are inferred from the claim text.