 Method of continuous drying of a paper or other porous web and a drying device for applying this method |
| I claim: 1. A method of continuous drying of a paper, cardboard, or other porous web, according to ... |
|
| Peripheral exhaust system for high velocity dryer |
| One object of my invention is to provide a peripheral exhaust system for a high velocity dryer ... |
|
| Apparatus and method for drying fibrous web material |
| According to the teachings of the present invention, the advantages of impulse drying are obtained ... |
|
| Method and apparatus for forming battery terminal bushings |
| It is therefore an object of this invention to produce a battery terminal bushing which is ... |
|
| Polycarbonate transesterification with tetraborate or tetraaluminate anion containing catalyst |
| What is claimed is: 1. In a process for preparing a high molecular weight polycarbonate by reacting ... |
|
| Polyamic acid copolymer system for improved semiconductor manufacturing |
| We claim: 1. A copolymeric polyamic acid which is capable of forming a polyimide consisting ... |
|
| Multi-ply headbox for a papermaking machine |
| Therefore, with the foregoing in mind, it is a primary object of the present invention to provide a ... |
|
| Multi-purpose clamping apparatus |
| The clamping apparatus of the present invention is characterized by a pair of base plates formed ... |
|
| Pressurized peroxide bleaching vessel having a rotatable scraper arm and cleaning device |
| A known pressurized peroxide bleaching vessel is shown in FIG. 1. The vessel comprises a housing 1 ... |
|
| Ledge for resiliently supporting a drainage wire of a paper making machine |
| The object of the present invention is to create a resilient ledge of relatively narrow structural ... |
|
|
Method for crosslinking cellulose fibers
| Details |
Inventors: Carney, Allan R.; Graef, Peter A.; Bowns, Mark W.; Bolstad, Clifford R.; Olmstead, Fred E.;
Assignee: Weyerhaeuser Company (Tacoma, WA)
Primary Examiner: Chin; Peter
Assistant Examiner:
Attorney, Agent or Firm: Klarquist Sparkman Campbell Leigh & Whinston
A method is disclosed for preparing a quantity of individual treated fibers from one or more fiber mats in a treatment apparatus. The apparatus comprises a fiber treatment zone, a conveyor for conveying each mat through the fiber treatment zone, wherein each mat is impregnated by an applicator with a crosslinking substance, and directly to an attrition device. The attrition device fiberizes the mats to form a fiber output having a low nit level, such as no more than about three, and a dryer for both drying the fiber output and curing the crosslinking substance. The fiberizer is configured to have minimize the accumulation of fiber at locations therein. An optional component of the fiberizer is a novel fluff generator comprised of multiple rotors each having plural longitudinally extended rows of radially extending rotor pins that rotate past groups of shorter pins mounted on the inside surface of the fluff generator housing. |
|
DETAILED DESCRIPTION The apparatus of the present invention is particularly adapted for preparing a quantity of individual crosslinked cellulose fibers from one or more mats comprised of non-crosslinked cellulose fibers.
The apparatus comprises: a fiber treatment zone; a means for conveying each mat through the fiber treatment zone wherein each mat is impregnated with a crosslinking substance; a means for applying the crosslinking substance to each mat in the fiber treatment zone; a means for subsequently directly conveying each mat from the fiber treatment zone without requiring aging of the mat.
The fiberizer fiberizes the treated mat to form a fiber output having a low nit level, such as a nit level of no more than about three; and a dryer for both drying the fiber output and curing the crosslinking substance to form dried and cured fibers.
Representative conveyors include, but are not limited to, conveyor belts and roller mechanisms.
In the fiber treatment zone, the crosslinking substance can be applied to the mat via any suitable means including, but not limited to, spraying, roller coating, and a combination of spraying and roller coating.
The fiberizer apparatus comprises at least an attrition device which produces a low nit level fiber output.
The fiberizer may also optionally include a disk refiner of conventional design coupled to the attrition device and a fluff generator of novel design coupled to the disk refiner.
A preferred embodiment of the attrition device comprises a substantially cylindrical rotor rotatable about a longitudinal axis and a housing surrounding the rotor.
The housing may include up to six mat feeder assemblies each capable of simultaneously urging a wet or dry treated mat into engagement with the rotating rotor.
The rotor includes groups or stacks of hammers extending longitudinally and radially over the surface of the rotor, such as in an alternating fashion.
In a specific arrangement, any hammer group is longitudinally and radially adjacent an empty space large enough to accept a hammer group, and any said empty space is adjacent a hammer group
|
|
Manufacturing Materials 
