Kraft fiber

The formulations for felted combustible cartridge cases, developed by Armor Research Foundation and described in Ref 23,p 20, contained some fungicides, as for example copper pentachlorophenate. One of the compns contg this fungicide consisted of Kraft fiber 40.8, NC 40.8, resin + DPhA 17.4 Cu pentachlorophenate, 2%... 

Axelrod(Ref 24) described two formulations of combustible cartridge cases prepd from felted NC combined with other ingredients. These cases were developed by the Armor Research Foundation, Chicago, Illinois. The 1st type, designated as XM-156 and intended for use in M68 105 mm Gun consisted of NC (12.3%N) 38, Northern Kraft fiber (bleached)... 

Polyvinyl Formal, Grade 7/955(of Shawinigan Resins Corp) 24%, with 1% DPhA added. The 2nd type, designated as XM-157 for use in XM81 152mm Gun consisted of NC (12.3%N)65, Northern Kraft fiber(bleached) 15 Polyvinyl Formal(same as above) 19%, with 1% DPhA added... 

The consumable cartridge cases developed by Armour Research Foundation consist of Kraft fiber resin binder with a small amt of a fungicide and a substance such as NGu or dicyanamidazide, which proved to be effective in increasing the consumability of cartridge cases at lower pressures... 

When NGu was used asone of the components of consumable cartridges, it was recrystallized from a satd aqueous soln into the pores of Kraft fiber prior to resin impregnation. When dicyanamidazide was employed, it was added as a component of the impregnating resin-solvent(Ref 23,pp I1I-V, 23, 25 27)... 

Investigations in the area of liner boards indicated that treatment of ground wood, of Kraft fiber, or of their mixtures with H2O2 or sodium chlorate in the presence of acids improved wet strength of the resulting liner boards. This was related to the formation of interfiber bonds (79). The process was patented 4 years later under inclusion of a fiber confrication step (80). 

The kraft fibers act as nucleating agent for the HDPE polymer when the fiber length is small. The composites crystallized much faster than the neat HDPE, but their crystallinity levels were lower. ... 

Slip-Sheet Systems. Such systems enable a unit load to be handled and moved without being supported on a pallet type of platform. Slip sheets (Fig. 4.5) are made of heavy corrugated paper-board, plastic, or kraft fiber composition and function as the base surface for the unit load. Special equipment or push-pull forklift truck attachments are required to move and handle loads unitized by this method. The cost benefits of slip-sheet systems are obvious in addition to lower initial cost, storage space requirements are foo of the cube required for empty pallets and shipping costs are less than for comparable loads using wood pallets. 

Baked foam trays based on cassava starch blended with 4% chitosan and 30% of kraft fibers presented some good properties, such as density, tensile strength, and elongation of 0.14 g/cm, 944.40 kPa, and 2.43%, respectively, but water absorption and water solnbility indexes that were greater than those of polystyrene foam (Kaisangsri, Kerdchoechnen, and Laohakunjit, 2012). 

Kraft fiber or kraft pulp is darker than other wood pulps, but it can be bleached to make very white pulp. Fully bleached kraft pulp is used to make high-quality paper where strength, whiteness, and resistance to yellowing are important. The kraft process is an industrial method amply used to extract cellulosic pulp from wood. Kaisangsri et al. (2012) mixed kraft fiber with cassava starch solution, later chitosan solution was added, and a hot mold baking was used to form the cassava starch-based foam by using an oven machine with controlled temperature. 

Kaisangsri et al. (2012] studied the biodegradable foam tray from cassava starch blended with natural fiber (kraft fiber] and chitosan. They observed that the addition of chitosan into the cassava-starch based foam decreases L values but increases a and b values, also cassava starch-based foams mixed with high concentrations of chitosan were yellow color because chitosan imparts this coloring (Fig. 15.7]. 

A wide variety of materials have been examined with starch. Nevertheless, the combination with chitosan and the use of natural fibers as reinforcement helps to improve compatibility, in addition to achieving the production of new composites. For example, kraft fiber improved quality and properties of cassava starch-based foam for applicable of fresh cut fruits that were comparable to polystyrene foam. Keratin fiber reinforcements, had good compatibility with... 

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