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Class 162/98 - Bast (e.g., flax, hemp, jute, ramie, sisal)


Subclass of Class 162 - Paper making and fiber liberation
Definition: Processes directed to the digestion or chemical treatment
No. of patents: 28
Last issue date: 07/31/2007


NumberTitleIssue Date
7250382Water-disintegratable sheet and manufacturing method thereof
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.
07/31/2007
7241711Water-disintegratable sheet and manufacturing method thereof
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 Stand...
07/10/2007
7045027Method of producing a fiber board
The present invention relates to a method of producing a fiber board characterized in that it comprises the following processes (a)–(f): (a) a separating process of a bast portion, (b) a fiberizing process by defibrating the bast portion ...
05/16/2006
6846382Nonwoven web material for infusion packaging and method of making same
A multi-phase, non-heat seal tea bag web material is provided with a pattern on either the top or bottom phases. The top phase is formed from fibers, such as hardwood, that provide a tighter or more dense fibrous phase than the vegetable fibers used in the base phas...
01/25/2005
6800319Accessing leaf and/or stem parts of plants
The invention relates to the separation and of components from vegetable raw materials. The invention provides a method for separating components from vegetable material which has at least leaf and/or stem parts, characterized in that the material is at least partly...
10/05/2004
6666951Process for the production of articles from treated lignocellulosic particles and a formaldehyde based resin binder
An improvement in the process for the production of articles from lignocellulosic material and a formaldehyde based resin binder comprising the step of treating the lignocellulosic material prior to combining it with the binder by exposing the lignocellul...
12/23/2003
6562191Process for producing pulp with a mixture of formic acid and acetic acid as cooking chemical
A process based on formic acid cooking for producing pulp from herbaceous plants and deciduous trees by using acetic acid as an additional cooking chemical. The obtained pulp can be used in fine paper and board production as short-fibered material, for in...
05/13/2003
6379495Process for the production of cellulose paper pulps by biodelignification of vegetative masses
Process for the production of cellulose paper pulps from vegetable masses, comprising the steps of mixing and conditioning a vegetative mass suitable to form a culture medium with an inoculum constituted of edible ligninolythic mushrooms, such as Lentinus...
04/30/2002
6348127Process for production of chemical pulp from herbaceous plants
A process for production of chemical fibrous pulp for making paper, paperboard and other fibrous products from herbaceous plants, such as kenaf. Pulp from the herbaceous plant is made by a process which involves densification of pieces of all or part of t...
02/19/2002
6302997Process for producing a pulp suitable for papermaking from nonwood fibrous materials
A process for producing a pulp suitable for papermaking from a nonwood fiber source material. Representative nonwood fiber source materials include corn stover and wheat straw. The process includes the steps of providing a nonwood fiber source material; d...
10/16/2001
6258207Alkaline peroxide mechanical pulping of non-woody species
High-yield chemimechanical lignocellulosic pulp is produced from non-woody species by cutting and screening the non-woody species, soaking them in an acidic aqueous solution preferably containing a chelating agent, treating the washed non-woody species wi...
07/10/2001
6251221Process for preparing cellulose from lignin-poor cellulose-containing feed stocks
The method of the invention involves treating cellulosic vegetable matter (the "Feed Stocks") for the selective recovery of lignin (when present in the feed-stock), cellulose and hemi-celluloses by: (1) reducing the material to be processed to an appropri...
06/26/2001
6187136Process for increasing the charge on a lignocellulosic material
A process for production of a lignocellulosic material modified by conjugation thereto of a phenolic substance comprising a substituent which, in the conjugated form of the phenolic substance, is, or may become, negatively or positively charged, respectiv...
02/13/2001
6179959Method of making kenaf pulp
A method of making kenaf pulp of the present invention is formed of a first process of cutting at least one of core, rind, root and stalk of kenaf into chips with a predetermined length; a second process of crushing the chips of kenaf by mixing the chips ...
01/30/2001
6139883Porous web material
A fibrous, porous web material of the non-heat seal tissue having a basis weight of 9-18 gm-2 and comprises a first layer and a second layer juxtaposed thereto wherein the second layer. The first layer comprising vegetable fibers and a second layer compri...
10/31/2000
5976320Method for producing paper pulp from fibers of annual plants
A method for producing paper pulp containing fibers of annual plants or of secondary raw materials produced therefrom, whereby fiber materials are shortened to a length which permits production of a homogeneous, pumpable suspension of the shortened fiber ...
11/02/1999
5958186Nonwoven material containing a mixture of pulp fibres and long hydrophillic plant fibres and a method of producing the nonwoven material
Nonwoven material produced by hydroentanglement of a wet-laid or foam-formed fibre web. The material comprises a mixture of short plant fibres, in particular pulp fibres, and long hydrophillic plant fibres, where the major portion of the fibres presents a...
09/28/1999
5958182Process for converting tropical plant material into fibers
A process for converting tropical materials into fibers useful in paper-making, textiles, insulation, general fiber filler and the absorption of liquids. The tropical materials utilized in the process include, banana, plantain or cavendish plant stalks, p...
09/28/1999
5912407Alkaline enzyme scouring of cotton textiles
The invention relates to a process for treatment of cellulosic material, as for example, knitted or woven cotton fabric, comprising the steps of preparing an aqueous enzyme solution comprising pectinase, treating the cellulosic material with an effective ...
06/15/1999
5728269Board produced from malvaceous bast plant and process for producing the same
A board composed of a lignocellulosic material and the modification thereof as the substantial components and having good mechanical strength, even when the board does not contain any components derived from an additive, by utilizing the autoadhesion of a...
03/17/1998
5000822Process for the preparation of imitation leather from natural hemp and the product thereof
An imitation leather product and a process for the preparation of the imitation leather product from natural hemp which comprises the steps of (a) firstly digesting natural hemp fiber with weak alkali solution, (b) secondly digesting with ammonia gas, (c)...
03/19/1991
4997488Combined physical and chemical treatment to improve lignocellulose digestibility
A synergistic combination of high-shear mechanical disruption and alkali pretreatment in a high solids reaction mixture constitutes a significant improvement in the alkaline peroxide treatment of lignocellulosic materials. The simultaneous application of ...
03/05/1991
4957599Alkaline extraction, peroxide bleaching of nonwoody lignocellulosic substrates
An improved process for delignifying and bleaching nonwoody, lignocellulosic material into products digestible by ruminants and ingestible by humans. The process comprises treating the substrate in an alkaline solution for a period of time, separating the...
09/18/1990
4891096Process for biochemical retting of phloem-fiber plants
The process for biochemical retting of phloem-fiber plants such as hemp, flax, ramie, jute, kenaf, etc. permits separation of the fibers of the bundle for subsequent utilization in the textile or paratextile industry. The process comprises treating the fi...
01/02/1990
4889591Crotalaria juncea paper pulps
The present process produces a long fiber suitable for making various paper products. The long fiber is derived from Crotalaria juncea. The processing consists of a particular technique for preparing the fiber for digestion and a particular digestion sequ...
12/26/1989
4851082Pulping process
A process for the production of a pulp from bast fibers, which includes reacting a mixture of the bast fibers and an aqueous digestion liquid at a temperature of 60°-130° C. The digestion liquid includes (a) hydrogen peroxide or a compound capable of ge...
07/25/1989
4649113Alkaline peroxide treatment of nonwoody lignocellulosics
By treating agricultural crop residues and other nonwoody lignocellulosic plant substrates with H2 O2 at a controlled pH within the range of about 11.2 to 11.8, the substrates are partially delignified and unprecedented levels of the...
03/10/1987
4106979Preparation of paper pulps from dicotyledonous plants
Paper pulp is prepared from dicotyledonous plants by stirring said plants in an alkaline solution in the presence of a surfactant and stain inhibiting agent to obtain a stock containing a woody core fraction and a bark fraction containing bast fibers, sep...
08/15/1978
 
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