30results about "Bleaching agents addition" patented technology

The present technology relates to fluff pulp having improved odor control and methods of making such fluff pulp. A fluff pulp is provided that includes bleached kraft fibers and a copper ion content of from about 0.2 ppm to about 50 ppm by weight of the bleached kraft fibers. The bleached kraft fibers include a length-weighted average fiber length of at least about 2 mm, a copper number of less than about 7, a carboxyl content of greater than about 3.5 meq / 100 grams; an ISO brightness of at least 80; and a viscosity of from about 2 cps to about 9 cps.

The invention provides super-sensitive paper and a preparation method thereof. The preparation method comprises the following steps: making raw paper; wherein the raw paper comprises a surface layer, a surface lining layer, a core layer and a bottom layer which are sequentially stacked; each layer of paper pulp comprises a whitening agent and a dye; and coating the front and back surfaces of the raw paper for one time. The super-sensitive paper obtained by utilizing the preparation method of the super-sensitive paper has the characteristics of high opacity, low glossiness, high printing color saturation, strong paper texture feeling, good texture and the like, has unique visual and touch effects, has the characteristics of roughness, thickness and obvious texture in the aspect of touch feeling, and has the characteristics of good color and luster in the aspect of vision. The product is low in glossiness, can present unique color and grain effects after being printed, enables people to feel distinctive texture and quality value of printed matters, and can be applied to the fields of high-end brands, cover design, brochure, business cards and the like, and in addition, the preparation method also has the characteristics of simple process and low cost.

An article including a first fiber derived from a first natural source and a second fiber derived from a fruit. A method of manufacturing an article may include combining a first and second fiber to form a fiber mixture, where the first and second fibers are obtained from discrete materials, and where at least one of the fibers is derived from an edible fruit of a plant. The article may be formed from the fiber mixture.

The application discloses a preparation method of a nano TiO2 composite fluorescent whitening agent and relates to the technical field of fluorescent whitening agents. The method comprises the following steps: firstly, one-time condensation is carried out on cyanuric chloride and 4,4'-diamino-stilbene-2,2'-disulfonic acid; secondly, secondary condensation is carried out on diethanolamine, and quaternary ammonium is formed by using epichlorohydrin in the secondary condensation process; finally, tertiary condensation is carried out on amino nanoparticles, so that the nano TiO2 composite fluorescent whitening agent is obtained. The nano TiO2 composite fluorescent whitening agent prepared by the application has the characteristics of good ultraviolet aging resistance and water solubility.

Provided is toilet paper which is excellent in thickness feeling and water disintegrability, has sufficient softness, gives a sense of security for human bodies during use, and is environmentally friendly. Toilet paper has three or four plies. The basis weight is 12.5 to 15.5 g / m2 per ply. 80 to 100 mass% of fiber is softwood kraft pulp that is subjected to oxygen pulping and is not bleached with chlorine. The toilet paper contains a cationic fatty acid amide-based softener, and has a paper thickness of 120 to 150 µm per ply, a paper thickness of 400 to 600 µm as a whole of the toilet paper, and a water disintegrability of 10 seconds or less.

Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with low mechanical energy input. In some variations, the process includes fractionating biomass with sulfur dioxide or a sulfite compound and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and / or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.

The is provided a method of manufacturing a sack paper having a Gurley porosity (ISO 5636-5) of less than 25 s, comprising the steps of: a) mixing an unbleached pulp with a bleached pulp to obtain a pulp mixture in such proportions that the dry weight ratio of unbleached pulp to bleached pulp in the pulp mixture is between 7:1 and 1:1; and b) forming the sack paper from said pulp mixture, wherein starch is added in an amount of 1-7 kg / ton paper.

Provided are plant pharmaceutical compositions, products, containers or kits containing such compositions, as well as methods and uses for controlling pathogens of plant diseases or for increasing plant growth and / or fruit production. [Solution] A method for maintaining or improving the efficiency of an irrigation system, comprising applying an effective amount of a composition to one or more pipes in the pipeline network of the irrigation system, wherein application of the composition sufficiently removes one or more components that inhibit the one or more pipes, the effective amount of the composition having a final concentration of 0.0001% to 10%, the composition comprising treated fermented yeast supernatant and one or more non-ionic surfactants, containing no active enzymes, and having a pH of less than 5.0.

The invention provides a cotton linter pulp bleaching agent, a preparation method and a bleaching method. The cotton linter pulp bleaching agent comprises a hydrogen bond acceptor and a hydrogen bond donor, the hydrogen bond acceptor is squaramide, and the hydrogen bond donor is a carboxyl-containing organic matter. The cotton linter pulp bleaching agent provided by the invention is good in stability and good in bleaching effect, and does not excessively consume water resources.

The invention provides a degradable paper material which comprises the following components in parts by weight: 60-85 parts of bagasse, 10-25 parts of bamboo fiber, 5-15 parts of sodium alginate, 5-10 parts of starch glue, 5-10 parts of nano cellulose and 5-15 parts of a functional aid, wherein the functional additive further comprises 5-10 parts of degradable wax, 2-5 parts of a toughening agent, 2-5 parts of an antioxidant and 2-5 parts of a bleaching agent. The preparation process comprises the following steps: steam explosion of bagasse, fermentation saccharification and desugaring, preparation of paper pulp, mixing to form raw paper stock, and finally hot press molding of the degradable paper material. The paper material is suitable for packaging paper meal boxes, realizes waterproof and oil-resistant functions through component and process optimization, maintains natural degradability at the same time, overcomes the defects of high cost and low recovery rate of traditional film spraying, and meets environmental protection requirements.

A method for producing sanitary pulp is provided. Also provided are sanitary pulps, uses of sanitary pulps in the production of paper, boards, molded fibrous articles or other fiber-based articles comprising the sanitary pulps.

This disclosure relates to improved packaging materials containing oxidized cellulose. More particularly, this disclosure relates to improved packaging materials containing oxidized cellulose exhibiting one or more of improved odor control and / or improved antimicrobial properties. This disclosure further relates to the use of oxidized cellulose in packaging materials as an anti-counterfeiting agent, and methods of testing for the same.

To provide fluff pulps with improved odor control and methods of producing such fluff pulps.SOLUTION: A fluff pulp is provided that includes a bleached kraft fiber and a copper ion content from about 0.2 wt.ppm to about 50 wt.ppm of the bleached kraft fiber. The bleached kraft fiber includes: a length-weighted average fiber length of at least about 2 mm, a copper number of less than about 7, a carboxyl content of more than about 3.5 meq / 100 grams; an ISO brightness of at least 80; and a viscosity from about 2 cps to about 9 cps.SELECTED DRAWING: None

The present invention relates to a method for reducing bacterial endospores in an aqueous fiber suspension containing recycled cellulose fibers, wherein the fiber suspension has an initial endospore amount, preferably ≥10000 CFU / ml. The method comprises adjusting the pH of the fiber suspension to a pH value of ≤6.5, adjusting the oxidation-reduction potential (ORP) of the fiber suspension to an ORP value of ≥200 mV using a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent into the fiber suspension for reducing bacterial endospores to an endospore amount of ≤1000 CFU / ml.

The invention relates to a method for reducing bacterial endospores in an aqueous fibre suspension comprising recycled cellulosic fibres, wherein the fibre suspension has an original endospore amount, preferably of ≥10 000 CFU / ml. The method comprises adjusting the pH of the fibre suspension to a pH value of ≤6.5, adjusting the oxidation-reduction potential (ORP) of the fibre suspension to an ORP value of ≥200 mV with a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent to the fibre suspension for reducing the bacterial endospores to an endospore amount of ≤1000 CFU / ml.

The present technology is directed to fluff pulps with improved odor control as well as methods of making such fluff pulps. A fluff pulp is provided that includes a bleached kraft fiber and a copper ion content from about 0.2 ppm to about 50 ppm by weight of the bleached kraft fiber. The bleached kraft fiber includes a length-weighted average fiber length of at least about 2 mm, a copper number of less than about 7, a carboxyl content of more than about 3.5 meq / 100 grams; an ISO brightness of at least 80; and a viscosity from about 2 cps to about 9 cps.

The invention relates to the technical field of pulping and papermaking, and discloses a hydrotalcite-based hydrogen peroxide bleaching stabilizer and application thereof. The hydrotalcite material serving as the hydrogen peroxide bleaching stabilizer is applied to the paper pulp bleaching process, the concentration of heavy metal ions in paper pulp can be reduced, and therefore the bleaching efficiency is improved; water body pollution is not caused in the bleaching process, and complicated post-treatment is not needed; when MgAl-SiO3 is used as a hydrogen peroxide bleaching stabilizer, an alkaline environment can be provided for H2O2, the generation of silicon scale is reduced, and the continuity of paper pulp bleaching is ensured.

The application provides a degradable paper pulp molded product and a preparation method thereof, and comprises the following raw materials in mass fractions: waste paper pulp suspension 50-55 parts, cellulose 25-30 parts, liquor of enzyme hydrolysis of distiller's grains 10-15 parts, modified filler 6-10 parts, waterproof agent 5-7 parts, retention aid 0.03-0.07 parts, and bleaching agent 1-2 parts. The specific waste paper pulp suspension, cellulose, liquor of enzyme hydrolysis of distiller's grains and modified filler are used as raw materials, and the raw materials interact with each other and synergistically, so that the comprehensive performance of the degradable paper pulp molded product is improved.

There is provided a process for producing hygienized pulp. There is also provided hygienized pulp, use of the hygienized pulp in production of paper, board, molded fiber article or other fiber based articles comprising the hygienized pulp.

The invention discloses a preparation method of a nano TiO2 composite fluorescent whitening agent, and relates to the technical field of fluorescent whitening agents. The preparation method comprises the following steps: firstly, carrying out primary condensation on cyanuric chloride and 4, 4 '-diaminostilbene-2, 2'-disulfonic acid, then carrying out secondary condensation by using diethanol amine, and carrying out quaternization by using epoxy chloropropane in the secondary condensation process; and finally, carrying out tertiary condensation by using the aminated nanoparticles to obtain the nano TiO2 composite fluorescent whitening agent. The nano TiO2 composite fluorescent whitening agent prepared by the invention has the characteristics of ultraviolet aging resistance and good water solubility.

The present invention relates to a method for reducing bacterial endospores in an aqueous fiber suspension containing recycled cellulosic fibers, the fiber suspension preferably having an original endospore load of 10,000 CFU / ml or more. The method includes adjusting the pH of the fiber suspension to a pH value of 6.5 or less, adjusting the oxidation-reduction potential (ORP) of the fiber suspension to an ORP value of 200 mV or more using a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent into the fiber suspension to reduce the bacterial endospores to an endospore load of 1,000 CFU / ml or less.

The invention relates to a method for reducing bacterial endospores in an aqueous fibre suspension comprising recycled cellulosic fibres, wherein the fibre suspension has an original endospore amount, preferably of ≥10 000 CFU / ml. The method comprises adjusting the pH of the fibre suspension to a pH value of ≤6.5, adjusting the oxidation-reduction potential (ORP) of the fibre suspension to an ORP value of ≥200 mV with a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent to the fibre suspension for reducing the bacterial endospores to an endospore amount of ≤1000 CFU / ml.

The invention relates to a method for reducing bacterial endospores in an aqueous fibre suspension comprising recycled cellulosic fibres, wherein the fibre suspension has an original endospore amount, preferably of ≥10 000 CFU / ml. The method comprises adjusting the pH of the fibre suspension to a pH value of ≤6.5, adjusting the oxidation-reduction potential (ORP) of the fibre suspension to an ORP value of ≥200 mV with a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent to the fibre suspension for reducing the bacterial endospores to an endospore amount of ≤1000 CFU / ml.

Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with low mechanical energy input. In some variations, the process includes fractionating biomass with sulfur dioxide or a sulfite compound and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and / or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.

A method for saving hydrogen peroxide in chemical mechanical pulping, the invention relates to the technical field of papermaking, and comprises pre-steaming, one-stage wood chip washing, two-stage wood chip washing, spiral dehydration, steam bin retention, MSD, pre-preg, reaction bin retention, high-concentration grinding, chemical mixing, bleaching, one-stage spiral pressing, two-stage spiral pressing, low-concentration grinding, pressure screening, multi-disc filtration and three-stage spiral pressing steps; wherein, the bleaching filtrate of the one-stage spiral pressing and the two-stage spiral pressing enters the clear / turbid filtrate pool; fresh alkali solution is added in the pre-preg step; the characteristic is that the clear / turbid filtrate pool is connected to the water inlet pipe of the pre-preg section, that is, the bleaching filtrate in the clear / turbid filtrate pool is reused in the pre-preg section. The bleaching filtrate is reused in the pre-preg section, and the supplemented fresh alkali solution is used to fully utilize the hydrogen peroxide residue in the bleaching filtrate and the remaining NaOH, Na2SiO3 and DTPA and other chemicals in the filtrate, thereby reducing the chemical consumption in the bleaching section and reducing the cost.

Disclosed is a method for improving fiber softness of high yield pulp, including a high yield pulp; the method comprises: treating the high yield pulp with ozone; and treating with cellulase; the disclosure offers the following advantages: The high yield pulp in the present disclosure is sequentially treated with ozone and cellulase. Removal of lignin on the surface with ozone increases the softness of the fiber and loosens the fiber structure. Therefore, treating the fiber with ozone can open a "channel" for the entry of cellulase. Then the cellulase allows water molecules to enter the fiber, and the distance between fiber macromolecule chains increases, which causes the fiber to deform with reduced stiffness, thereby improving the softness. Therefore, by treating with cellulase based on the pretreatment of high-yield pulp with ozone, the present disclosure increases the accessibility of cellulase and fiber. Besides, ozone as a green agent can improve the softness of the fiber without or with little pollution to the environment.