| |||||||||||||||||
| IPC: |
| ||||||||||||||||
| Applicants: | COURTAULDS FIBRES (HOLDINGS) LIMITED [GB/GB]; 50 George Street, London W1A 2BB (GB) | ||||||||||||||||
| Inventors: | URWIN, Philip, John; (GB). JACK, Iain, Richard; (GB) | ||||||||||||||||
| Agent: | NEWBY, John, Ross; J.Y. & G.W. Johnson, Furnival House, 14-18 High Holborn, London WC1V 6DE (GB) | ||||||||||||||||
| Priority Data: |
| ||||||||||||||||
| Title | (EN) IMPROVEMENTS IN AND RELATING TO THE MANUFACTURE OF FEEDSTOCK FOR A PROCESSING OPERATION (FR) AMELIORATIONS APPORTEES A LA CREATION D'UNE CHARGE UTILISEE DANS UNE OPERATION DE TRAITEMENT | ||||||||||||||||
| Abstract: | 
(EN)A method of making feedstock from material supplied in rolls of flexible sheet material which comprises the steps of creating a pluri-layer web of 'n' different layers of sheet material, each layer being selected with regard to some known parameter property of the sheet material whereby the pluri-layer web has an aggregate value of the selected parameter which lies within a chosen range of values of said parameter property. Conveniently the feedstock is created by disintegrating the pluri-layer web to create a mass of comminuted pieces of sheet material.
| ||||||||||||||||
In the production of cellulosic fibres it is known to use as raw material wood pulp wound in stock rolls of sheet material, to break up the sheet material in a mechanical pulp mill and to convey the broken pieces of sheet material from the mill to a subsequent processing station. The subsequent processing can be critically dependent on the aggregate properties of the mass of broken pieces. This invention, in its different aspects, relates to a novel way of feeding individual layers of sheet material as a pluri-layer web of raw material capable, on comminution in the mill, of producing a mass of broken pieces of the required aggregate properties.
In the case of stock rolls of sheet-formed wood pulp, suppliers grade the sheet-formed material on a roll, inter alia, on the basis of the viscosity of a liquid product produced in a pre-determined manner from the wood pulp and supply the roll to the end user with a viscosity rating. The end user can then select from the range of stock rolls available those having viscosity ratings which he wishes to use for a particular feedstock material.
In accordance with this invention, prior to creating the feedstock material from a plurality of different stock rolls of selected viscosity rating, the sheet materials from a number of stock rolls are drawn together to create a pluri-layer web which is fed as such to a pulp mill for comminution to create the required feedstock material .
No comments:
Post a Comment