Fiber furnish

Dry Form Process, The advent of the pressurized refiner led eventually to dry-formed wood fiberboards because high-consistency pulps can be produced. Green wood chips contain equal parts water and dry wood matter and can be pressure refined in saturated steam with little change in moisture content. Fiber from the refiner at fifty percent consistency can be made fluffy and readily suspendable in air. This enables vapor-phase dewatering in hot-air driers to produce a fine, dry fiber that can be formed in air and dry pressed. Without liquid-phase dewatering, solubles formed by the steam cooking of chips remain in the fiber furnish going to the board machine. 

Five were clay filled and one had lime mud (calcium carbonate) as filler. The fiber furnish varied from all rag to mixtures of rag and sulfite wood pulp, to all wood fibers.. . . The sixth sample which had the lime mud was 75% sulfite and 25% soda wood fibers it had a pH of 8.9, while the other five samples had pH values varying from 3.6 to 4.3. When Edwin Sutermeister examined the samples in 1929 and retested them, his report said, all of the acid samples were badly discolored and were absolutely without strength, while the lime mud sample was much whiter and seemed as strong as ever. ... 

The potential permanence is built into paper at the time of manufacture it is determined by the materials used and the processes of manufacture. Three important factors are recognized (1) deterioration of the cellulose fibers prior to manufacture into paper and the presence of noncellulose components (2) the introduction of additives (sizing, loading, etc.) to the papermaking stock and (3) the presence of deleterious impurities originating from the fiber furnish, additives, process water, and mill equipment. 

If the question of fiber composition is recognized by both the manufacturer and the user, the choice of a fiber furnish which has the necessary qualities is achieved by agreement. When the fiber source is unknown to the purchaser, a fiber analysis is a necessary requirement. Procedures for fiber analysis are well standardized and reliable—e.g., TAPPI standard T401 (3) and ASTM D1030 ( 4). 

Contained 65% virgin fibers and 35% recycled fibers. b 100% virgin-fiber furnish. c Machine direction. d Cross direction. 

A solid compounding material, usually in a finely divided form, which may be added in relatively large proportions to a polymer for technical or economic reasons A material, generally non-fibrous and inorganic, added to the fiber furnish... 

Strazdins, E. (1984), Chemical aids can offset strength loss in secondary fiber furnish use. Pulp and Paper, March. 

Uses Effluent system defoamer for foam control in textile, paper, and municipal effluent systems in aeration ponds, flumes, and at river outfall paper machine defoamer esp. for recycled fiber furnish foam control agent for coatings based on starch, casein, and waxes Features General purpose exc. dispersing props. 

The bases for hygienic products are tissue grades with basis weights of 5 to 35 g m". Consumer demands drive the tissue industry to ever more softness and absorbency of the tissue grades used e. g. in the bathroom (toilet, facial) or in the kitchen (towels). Softness can be increased by the proper selection of fiber furnish and chemical additives or the proper machine concept and operation e. g. by low or no wet pressing. On the other hand sufficient paper strength and economy of production have to be regarded. 

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