886results about "Vegetable material" patented technology

The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) and a narrow molecular weight distribution. Further, the present invention provides processes for making compositions, useful for making lyocell fibers, by contacting an alkaline pulp having a high hemicellulose content of at least about 7% with an oxidant sufficient to reduce the average degree of polymerization to about 200 to 1100 without substantially reducing the hemicellulose content or increasing the copper number of the pulp.

Thin elongated bamboo chips are produced and then are softened and dried. The softening of the chips reduces void spaces which uses less glue and produces stronger members. The chips are then joined together with glue under pressure to form a bamboo board. By varying the depth and length of the chip form, the member produced can form a board, chipboard, beams, or columns of any size. Additional boards may be produced and glued together to form a larger board, beam, or column. Several chipboard layers fabricated in large sheets and glued together will form ‘multi-ply bamboo’, a bamboo substitute for plywood. Once cured, the member is kiln dried and sealed for moisture. The resulting bamboo member's strength and geometrical form is stable and consistent enough to be used as a structural grade member for frames, homes, buildings, and furniture.

Disclosed is a water disintegratable sheet of which fibers are hydroentangled about each other. The water disintegratable sheet includes: at least one kind of primary fibers having a fiber length of at most 10 millimeter; and bast/leaf fibers having a Canadian Standard freeness value of at most 600 milliliter and a fiber length of at most 10 millimeter.

Disclosed is a water disintegratable sheet including bast/leaf fibers and at least one kind of primary fibers. The bast/leaf fibers have a Canadian Standard freeness value of at most 600 milliliter and occupy 2 to 75% by weight of a total fiber weight of the sheet.

The invention provides for methods for producing pulp (comprising cellulose) and lignin from lignocellulosic material, such as wood chips. The methods involve acid catalyzed hydrolysis. Lignocellulosic material having a relatively high moisture concentration can be used as the starting material. The lignocellulosic material is impregnated with an acid (preferably nitric acid) and heated. During the heating lignin is depolymerized at relatively low temperatures, and the acid catalyst is distilled off. The acid catalyst can be collected and recycled after impregnation and heating. The lignocellulosic material is then digested in an alkaline solution under heat, dissolving the lignin and allowing the pulp to be removed. Acid is added to the black liquor to precipitate the lignin which is then removed. The resultant amber liquor can be further processed into other ancillary products such as alcohols and/or unicellular proteins.

A composite web and process for manufacture from post-industrial scrap wherein the fibers are pre-opened and cut to an average fiber length of about 4 mm. A scrap fiber component and a cellulosic component of such fibers are blended into a fiber furnish. The scrap fiber component includes at least 15% synthetic fibers and may include a blend of natural fibers, high melting point synthetic fibers, and low melting point synthetic fibers. The cellulosic component may include post-industrial cotton fibers which may be refined before blending with the scrap fiber component. The fiber furnish is processed into an intermediate web such as by a drylaid or a wetlaid nonwoven process. The intermediate web is saturated with a latex binding agent and pressed and/or dried to form a composite web capable of further processing into molded or formed consumer or industrial products. The process is capable of producing a high basis weight composite web.

Discrete particles of cellulosic material are flowable and meterable. They are easily dispersible in an aqueous or a dry medium. The particles comprise singulated cellulose fibers that have been densified. The particles have a density of at least 0.3 g/cc.

A solvent dehydrated microbially-derived cellulose material is described for use as an implantable material in general and plastic surgery.

The present invention discloses a method for preparing hemp viscose fiber by using hemp plant and hemp visose fiber prepared by adopting said method. Said method includes the following steps: preparing raw material, digesting, washing material, pulping, removing sand, bleaching, water-washing, fiber-making, impregnating, pressing, pulverizing, aging, xanthating, dissolving, mixing, filtering, defoaming, spinning, drawing, cutting and making after-treatment.

The present invention discloses a cotton pulp with high degree of polymerization and method for preparing said cotton pulp with high degree of polymerization by using cotton linters as raw material. Said preparation method includes the following steps: preparing raw material, digesting, washing material, pulping, removing sand, bleaching, acid treatment, water-washing, filtering and pulp-making, etc.

The present invention relates to a method for preparing cellulose polyblend fiber by using ionic liquid as solvent and its application method. Said preparation method includes the following steps: (1), uniformly mixing pulverized cellulose, chitin/chitosan and ionic liquid, dissolving them for 1-80 h at 25-160 deg.C so as to obtain the uniform stable spinning solution whose total solid content is 3-40%; (2), filtering and defoaming, then making the spinning solution be passed through single-hole or multi-hole spinneret, and fed into a coagulating bath and solidified, its spinning speed is 5-150 m/min; and (3), plasticizing, drawing, washing, bleaching, oiling and drying so as to obtain the invented cellulose polyblend fiber product. The spinning solution prepared by aid invention also can be used for preparing hollow fiber membrane, specially, can be used for making artificial organ and membrane for water purifier.

The invention relates to a composite material for manufacturing an automotive interior trim part. The bamboo fiber composite base material for manufacturing the automotive interior trim part is prepared by taking thermoplastic synthetic fibers (polypropylene PP, polyethylene PE or polyester PET and the like) as a bonding substrate and bamboo fibers as a reinforcing material through hot pressing. The bamboo fiber composite base material is characterized in that the bamboo fibers are prepared by sawing natural bamboo into pieces with length required by production, removing parenchyma from the bamboo by mechanical, physical, chemical and biological methods and directly extracting vascular bundle bamboo fibers from the bamboo, and have the length of 60 to 150mm, the diameter of 0.3 to 1.5mm, the strength of 60 to 120MPa and the water content of 10 to 12 percent. The automotive interior trim part can be subjected to press forming when the bamboo fiber composite base material covers artificial leather, leather or a knitted or non-woven fabric for surface decoration.

The invention relates to a degumming technology for preparing textile fibre by utilizing mulberry bark as a raw material. The degumming technology is characterized in that mulberry bark fiber is degummed by adopting an enzyme treatment method and comprises the following steps: the natural treatment of the mulberry bark; microwave heating; mechanical hammering and dedusting; acid dipping pretreatment; alkali neutralization; alkali pectase treatment; alkali boiling; bathing; cellulose treatment; bleaching; bathing; and drying. The invention has the advantages of high yield efficiency, little fiber damage, high fiber manufacture rate, extremely small consumption of alkali, acid and water, little pollution, low energy and water consumption and safe operation environment.

The invention discloses a process for producing a bamboo fiber, comprising the following steps of selecting raw materials, extending, splitting, classifying, stewing and cooking, pickling, cleaning, dehydrating, curing and the like, thus preparing the bamboo fiber with the fineness of 0.03-0.08mm and the length of 30-80mm. The process can lead a whole bamboo to be extended by a special tool and subsequently and directly processed without being cut; furthermore, the processed bamboo fiber is longer, finer and more uniform, the utilization ratio of the resource is high, the cost is low and the quality of the product is stable.

The flash bursting and high temperature digesting process for degumming hemp bast fiber includes pre-treatment, flash bursting and high temperature digesting to eliminate residual pectin, hemicellulose and lignin from hemp bast fiber, and raise the fiber fracturing degree and softness. The flash bursting and high temperature digesting process has ideal degumming effect, obvious non-fiber component eliminating effect and less pollution, and the degummed hemp bast fiber has high cellulose rate, high fiber fracturing degree and high fiber flexibility.

Dry products, and particularly dry tissue substrates, including a blend of conventional papermaking fibers and microalgae are disclosed herein. Use of a cationic retention aid in the dry tissue substrates helps to provide a tissue sheet retaining the microalgae without being detrimental to tissue properties such as caliper, bulk, air permeability, slough and absorbent capacity. Additionally, use of a flocculating agent may agglomerate the microalgae and make it easier to retain the microalgae within the tissue sheet.

A process for producing bamboo fiberfill from raw bamboo fiber includes, obtaining a bale of the raw bamboo fiber, picking up and separating the raw bamboo bale fiber into tufts of bamboo fiber with a bale opener, feeding the bamboo fiber tufts into a blending hopper configured to blend the bamboo fiber tufts, feeding the blended bamboo fiber tufts into a beater configured to open the bamboo fiber tufts, and feeding the opened bamboo fiber tufts into a fine opener configured to reduce the size of the opened bamboo fiber tufts and refine the opened bamboo fiber tufts into the bamboo fiberfill, wherein the bamboo fiberfill has a fiber length of about 30 millimeters to about 60 millimeters and a linear density of about 0.5 denier to about 5.0 denier.

This invention provides a process for treating chemical woodpulp, or chemical cellulose including cotton linter, including the step of applying an electron processing technology (EPT) step to chemical woodpulp, or chemical cellulose, as the case may be, on an in-line basis to provide control of pulp viscosity or degree of polymerisation (DP). The invention also provides a method of process control in treating the aforementioned woodpulp or cellulose, including the step of using radiation dose-viscosity relationship curve for applying an EPT step on an in-line basis. The in-line EPT step may, in one form of the invention, replace and hence eliminate a chemical DP reduction step.

The present invention discloses a degumming method of bast fibre. Said method includes the following steps: soaking bast fibre in water for 40-80 min, making its water content is 60-100%, then placing the water-contained bast fibre into a steam explosion tank, making steam explosion under the condition of that its pressure is 1.3-1.7 MPa and the pressure-retaining time is 3-8 min, taking out the bast fibre, washing said bast fibre with water and drying so as to obtain the invented degummed bast fibre.

The invention relates to a process for producing hemp-like bamboo fibers, which comprises the following steps of: sawing bamboo according to certain length, flattening, soaking in intermediate temperature softening solution for 3 to 24 hours or cooking by using tailor-made softening solution at a high temperature under high pressure for 15 to 60 minutes, draining, feeding into a fiber separator, rolling, kneading, tearing, combing, opening and the like to prepare the hemp-like bamboo fibers; putting the hemp-like bamboo fibers into a bamboo fiber purifying reactor, performing alkali boiling, bleaching, cleaning and curing; and opening, decontaminating and regularly combing the hemp-like bamboo fibers by using a hackling machine or a middle cutting machine to prepare hemp-like spinnable bamboo fibers. By the method, the hemp-like bamboo fibers can be produced; and the fibers are regular, uniform and soft, have the characteristics of large length, high strength, low fineness and the like, and have spinnability similar to that of hemp and flax fibers.

Soft and strong fibrous structures and more particularly soft and strong fibrous structures that contains less softwood fibers than known fibrous structures and methods for making such soft and strong fibrous structures are provided.

The invention relates to a degumming method for hemp fiber, in particular to a method for combined application of chemical with super critical CO2 fluid degumming. Wherein, before carrying out super critical CO2 fluid degumming, the hemp fiber first goes through chemical treatment, then super critical degumming is carried out under low and hi pressure respectively. The invention can obviously reduce the non-cellulose composition for example lignin, etc. in hemp fiber, is of an ideal degumming effect, with obviously improved cellulose ratio, very good softening effect of fiber, hence improved process quality of hemp fiber; the invention additionally overcomes the shortcoming associated with prior degumming way such as high pollution, etc., and is of high economic efficiency.