摘要:
Methods of treating wood and wood products include irradiating untreated wood having a first molecular weight with ionizing radiation to cause an increase in the molecular weight of a cellulosic component of the wood to a second, relatively higher molecular weight.
摘要:
Methods of treating wood and wood products include irradiating untreated wood having a first molecular weight with ionizing radiation to cause an increase in the molecular weight of a cellulosic component of the wood to a second, relatively higher molecular weight.
摘要:
The present invention relates to a fiber modifying method including step (i) of contacting an organosiliconate with fiber and step (ii) of polymerizing the organosiliconate, a modified fiber modified by this method and a fiber modifying agent containing an organosiliconate and water.
摘要:
Methods are provided for creating covalent bonding of webs by combining cellulosic fibers having a carboxyl content approximately greater than 7 meq/100 g with one or more crosslinking agents. In a first step, a carboxyl group is placed onto a fiber. In an embodiment, the fiber is then reacted with an oxazoline-functional polymer which has been combined with a polycarboxylate compound. Heat is applied to the treated web, and this enables formation of a cross-linked bridge in the form of a covalent bond. In an embodiment, the covalent bonding of the carboxylated cellulose pulp webs utilizes oxazoline-functional polymers and polyacrylic acid. The oxazoline polymer in combination with polyacrylic acid should form a network polymer with covalent bonds to the cellulose carboxyl groups. The non-woven web may be strengthhened by covalent bonding, thereby improving overall wet/dry strength of the final product.
摘要:
The present invention concerns a process for reducing the susceptibility of lignocellulosic material to unwanted yellowing, particularly yellowing caused by light and heat. According to the invention, the fibres are activated enzymatically or chemically and then contacted with a modifying agent capable of bonding to the oxidized fibre material, rendering the lignocellulosic fibre material improved resistance to brightness reversion. By means of the invention, brightness reversion caused by light or heat or a combination thereof can be retarded and even stopped.
摘要:
A novel endoglucanase derived from Staphylotrichum coccosporum, a polynucleotide encoding the endoglucanase, and a cellulase preparation containing the endoglucanase are disclosed. The endoglucanase or cellulase preparation is available for a washing use or fabric processing, such as a color clarification of a cellulose-containing fabric, a reduction of fuzz, an improvement of the touch feel and appearance of the fabric, providing a localized color change to the fabric, or a reduction of stiffness.
摘要:
An ink jet recording paper capable of compatible with high speed ink jet printers is provided. By using, as a fiber material, mercerized pulp obtained by applying an alkali treatment to pulp, an ink jet recording paper of high ink absorption speed and high ink coloring density is formed. Since the paper itself has excellent ink absorption speed, there is no requirement for applying coating for improving the ink absorption and it can be used as non-coated type ink jet recording paper.
摘要:
Differentially densified fibrous structures, methods for making same, and processes for treating fibers used in the fibrous structures are provided. More particularly, fibrous structures comprising two or more regions, at least one of which exhibits a density that is at least 1.6 times greater than another region within the fibrous structure, methods for making such fibrous structures and non-naturally occurring fibers useful in such fibrous structures are provided.
摘要:
A method for treating secondary fiber to achieve wet strength while retaining repulpability is provided. In an embodiment, the method involves supplying a first line of secondary fiber which represents a total supply of secondary fiber. The method has a further step of removing a portion of the total supply of secondary fiber in the first line and transporting the portion into a second line. The second line is treated with a cationic resin treatment. A third line supplies virgin fiber. The third line and the first line are combined. Next, the treated secondary fiber in the second line is combined with the mixed contents of the first line and third line. Separation of the virgin fiber line from the secondary fiber line at initial stages of the process lowers cationic demand for the system, and reduces an amount of resin required to treat the system.
摘要:
The present invention is polysiloxane pretreated pulp fibers comprising pulp fibers, and a polysiloxane. The polysiloxane pretreated pulp fibers have a polysiloxane content of about 0.4 percent or greater by weight of dry pulp fibers, a silicone retention factor of about 0.6 or greater, and an initial water drop absorption value of about 180 seconds or less.