255results about "Cork treatment details" patented technology

A method to produce on a commercial scale, high aspect ratio cellulose nanofilaments (CNF) from natural lignocellulosic fibers comprises a multi-pass high consistency refining (HCR) of chemical or mechanical fibers using combinations of refining intensity and specific energy. The CNF produced represents a mixture of fine filaments with widths in the submicron and lengths from tens of micrometers to few millimeters. The product has a population of free filaments and filaments bound to the fiber core from which they were produced. The proportion of free and bound filaments is governed in large part by total specific energy applied to the pulp in the refiner, and differs from other cellulose fibrillar materials by their higher aspect ratio and the preserved degree of polymerization (DP) of cellulose, and are excellent additives for the reinforcement of paper, tissue, paperboard and the like. They display exceptional strengthening power for never-dried paper webs.

The invention relates to a degreasing and desugaring method of sympodial bamboo, which belongs to the technical field of processing and preservation of wood or similar materials. The degreasing and desugaring method is combined with the structural characteristics of the sympodial bamboo, and the two steps, namely high-temperature and high-pressure smoking and cooking, and high-temperature and high-pressure carbonization, are adopted for degreasing and desugaring the sympodial bamboo. In the step of high-temperature and high-pressure smoking and cooking, water and steam are simultaneously used for steam-boiling so as to strength the degreasing and desugaring; and in the step of high-temperature and high-pressure carbonization, the secondary degreasing and desugaring is performed on bamboo fiber, and exhaust is performed during the carbonization process multiple times, thereby removing lipids and sugars in the bamboo fiber to the greatest extent, simultaneously unifying the color of the bamboo fiber and performing the color matching on the bamboo fiber. According to the degreasing and desugaring method, simple equipment and the simple process are applied for performing the degreasing and desugaring treatment on the sympodial bamboo so as to realize anti-moth-eaten and anti-mildew effects, no preservative type substances are added during the treatment process, the high-temperature and high-pressure carbonization treatment is simultaneously adopted, the color matching can also be performed on the bamboo fiber, and the adding of a dyeing agent is not required, thereby being green and environmentally-friendly.

Methods for conveying, mixing, leveling, and flaking dewatered pulp to produce pulp flakes suitable to be used in a dryer. Methods for producing a consistent flow rate of pulp, and, for producing uniform pulp flakes in terms of pulp flake size and pulp flake moisture content. A method includes introducing a dewatered pulp to a rotating shaftless screw conveyor. The pulp is deposited from the screw conveyor onto a moving belt conveyor through a chute. The pulp is leveled with a rotary doctor located above the belt conveyor to produce a substantially even rate of mass flow of pulp along a length of belt conveyor. Uniform and consistent quantities of pulp per unit time can then be fed from the belt conveyor to a pulp flaker that then translates into an even rate of pulp mass flow to the dryer.

Cellulosic biomass is reduced to a micropowder with particles having average diameters below 5-10 micrometers with a significant fraction of the particles have diameters below 1 micrometer. Biomass (e.g., wood, agricultural waste or other plant materials) is first processed into pieces having a maximum diameter of about 10 mm. This is then dried to reduce its water content to no more than about 15% by weight and introduced into a disruptor which reduces the particle size to about 1 mm. Next the biomass is processed with a disc mill where edges of rotating discs travel along a groove pressing and squeezing the biomass, thereby breaking the biomass pieces into smaller and smaller particles. The resulting micropowder is extremely susceptible to enzymatic or chemical hydrolysis into constituent sugars. In addition, the micropowder can be suspended in an air stream and burned directly to provide heat to boilers and similar devices.