449results about "Luminescent/fluorescent substance addition" patented technology

Whitened fluff pulp and methods for making whitened fluff pulp. The whitened pulp is a fluff pulp that has been treated with one or more of a white pigment, a colorant, or a fluorescent whitening agent.

An authenticatable paper product is prepared by adding to a papermaking furnish fibers treated with from about 50-200 lb/ton of a fluorescent whitening agent (FWA). The paper made from the papermaking furnish will include fluorescent cellulosic fibers in an amount ranging from between 0.1-4.0 lb/ton to achieve FWA concentrations within the range of 1-20 ppm.

The present invention relates to a method of increasing the brightness of pulp, pulp made from such methods and methods of using such pulp.

In this papermaking process, a first strength agent is added to a stock suspension containing pulp and optionally other additives prior to its being formed into a web at the wet end of a papermaking machine. The web is then formed and processed into paper. A second strength agent is then applied to the surface of the paper. The strength agents may be selected to have opposite charge.

This invention relates to novel whitening agents for cellulosic substrates. The whitening agents are comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by having a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPa^0.5. This invention also relates to laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions that comprise such whitening agents.

Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.

A method for manufacturing pulp. The manufactured pulp includes at least 30 w-% nanofibrillated cellulose material measured from the dried pulp. A raw material is introduced to a system. The raw material includes cellulose. At least one type of an optical brightening agent is dosed as a refining additive to the system. The raw material is refined in the presence of the dosed optical brightening agent in at least one pre-refining stage or fibrillation stage to form fibrillar cellulose material.

The invention discloses a multiple reversible color change microcapsule anti-counterfeiting material and a preparation method and applications thereof. The preparation method comprises the following steps: dissolving at least one of temperature-sensitive material, humidity sensitive material, ultraviolet excited fluorescence material and infrared excited fluorescence material in high boiling point solvent containing UV resistant agent and antioxidant, then adding emulsifier and protective colloid to obtain emulsion solution, and adopting the in-situ polymerization method to obtain the anti-counterfeiting material with microcapsule structure. The microcapsule structure of the invention can isolate the air and the wall of the microcapsule can reduce the light transmission, thus improving the weather resistance and light resistance of the anti-counterfeiting material and prolonging the use validity of the product. The material is a microcapsule aqueous solution so that the material is completely applicable to the coating method of the currently existing water-based paint, removes apprehensions in areas of safety, health and environmental protection, thoroughly solves the defect of the complicated solvent-based (oily material) coating and processing method, satisfies the anti-counterfeiting demand and can be applied in papers, cloth and film materials in large.

The instant invention relates to liquid compositions comprising derivatives of diaminostilbene, binders and ink fixing agents such as divalent metal salts for the optical brightening of substrates suitable for high quality ink jet printing.

Compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The composition and method maintains and/or enhances brightness, prevent yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the described agents produce a synergistic effect not previously identified in the paper process.

The invention discloses application of a multifunctional carbon quantum dot taken as a fluorescent whitening agent in the fields of spinning printing and dyeing, washing agents, papermaking, plastics, leathers or coatings and the like. The carbon quantum dot disclosed by the invention has the advantages of wide application field, good whitening effect and good light resistance, is innoxious and environmentally friendly, can be applied to the fields of spinning printing and dyeing, washing agents, papermaking, plastics, leathers or coatings and the like, and can generate unforeseeable technical effect because the carbon quantum dot can generate active oxygen free radicals under the condition of illumination, wherein the unforeseeable technical effect is as follows: the bacteria attached to the surfaces of spinning printing and dyeing materials, the washing agents, paper sheets, the plastics, the leathers or the coatings and the like can be effectively killed after the spinning printing and dyeing materials, the washing agents, paper sheets, the plastics, the leathers or the coatings and the like which are doped with the carbon quantum dot absorb ultraviolet light.

The invention belongs to the technical field of a papermaking process and particularly relates to a process for preparing cultural paper by utilizing full-recovered pulp. The process for preparing the cultural paper by utilizing the full-recovered pulp comprises the following preparation steps of: a step A of sorting and loading waste paper raw materials; a step B of beating; a step C of screening and purifying; a step D of carrying out primary floatation deinking; a step E of carrying out primary concentration and heat dispersion; a step F of carrying out secondary floatation deinking; a step G of carrying out secondary concentration and heat dispersion; a step H of carrying out oxidation bleaching; a step I of carrying out reduction bleaching; a step J of storing in a tower; a step K of milling pulp; a step L of preparing the pulp; a step M of forming and manufacturing the paper with the pulp; a step N of squeezing and dehydrating; a step O of drying; a step P of squeezing and sizing; and a step Q of carrying out press polishing and then completing processing of a finished product by the working sections of reeling, rewinding, packaging and warehousing. According to the process disclosed by the invention, the high-quality cultural paper of which the appearance quality and the physical indexes all reach the domestic and overseas standards is produced by utilizing the low-price waste paper raw materials; the production cost is reduced; the production environment is clean and environmental-friendly; and the production efficiency is high.

A method of making paper or paperboard is described, which includes introducing at least one charged starch, preferably having a degree of substitution greater than 0.045, and at least one optical brightening agent to a papermaking pulp and then forming the pulp into paper or paperboard. The present invention further describes methods of improving optical brightener performance.

A method to detect organic contaminants in pulp and fiber is described which uses hydrophobic dyes, such as fluorescent dyes.

The invention relates to high-whiteness coated paper coated by using raw paper with medium whiteness, a coating method and a coating. The coating method is mainly characterized by greatly reducing the whiteness of the raw paper for producing conventional high-grade coated paper such as copper plate paper and coated white cardboards. The coating mode is a common single-side or double-side two-layer (double-coating) or multi-layer coating mode in a papermaking plant. By using the mechanical property of the raw paper, the printing property of coatings and the synergetic whitening effect between the coatings, yellowing of the raw paper is inhibited, and the whiteness of the coated paper is improved to over 86 percent so as to meet the requirements of national standards on the high-grade copper plate paper. The raw paper of the high-grade coated paper can be made by using various kinds of environment-friendly and resource-saving pulp of medium whiteness more widely, and is favorable for promoting the development of the low-carbon manufacturing technology of the pulping papermaking industry. The newly invented coated paper can substitute the traditional high-grade paper such as the copper plate paper, the coated white cardboards and the like in the fields of printing and packing.

The present invention is directed to a method of efficiently maintaining or increasing brightness and whiteness of refined paper. In one aspect, the invention is directed to a method for substantially maintaining (or even increasing) brightness and/or whiteness of paper with increased pulp refining, the method including refining the pulp down to reduce the freeness at least about 100 CSF and adding a combination of an OBA and a carrier polymer to the paper surface in the size press in amounts sufficient to increase brightness and/or whiteness of the final paper. In another aspect, the invention is directed to a method of making paper from refined pulp that includes refining a cellulosic fiber suspension to reduce the freeness at least about 100 CSF and contacting the cellulosic fibers with at least one optical brightening agent (OBA) during or after the refining step prior to adding any additional wet end chemicals.

A method is provided for measuring hydrophobic contaminants distributed in paper pulp suspension. The method comprises: adding a fluorescent dye (18) to the paper pulp suspension (12) including fibers and hydrophobic contaminants, the dye (18) interacting with the hydrophobic contaminants of the paper pulp suspension (12); submitting the paper pulp suspension (12) including the fibers, the hydrophobic contaminants, and the dye (18) to light characterized by a wavelength exciting the dye (18) to produce light emission signals; and detecting the light emission signals and evaluating the signals to measure the hydrophobic contaminants.

The present invention relates to a sizing composition that, when applied to paper substrate, creates a substrate, preferably suitable for inkjet printing, having increased print density, and print mottle, as well as print sharpness, low HST, and/or image dry time, the substrate preferably having high brightness and reduced color-to-color bleed as well. In addition, the present invention relates to a method of reducing the HST of a paper substrate by applying the sizing composition to at least one surface thereof. Further, the application relates to methods of making and using the sizing composition, as well as methods of making and using the paper containing the sizing composition.

A dull coated printing paper that is bulky (low in density) having a density of 0.90 to 1.15 g/cm³ and yet offers excellent pliability, superior surface smoothness, high degree of print gloss and minimal small-scale gloss variations in the image area are obtained by forming a coating layer comprising a pigment and an adhesive on a base paper which contains an organic compound having an action to inhibit binding between pulp fibers and then carrying out calender treatment at a line pressure for the treatment of 50 to 150 kg/cm.

The invention discloses an environment-friendly coated white board which sequentially comprises a board body paper bottom layer, a core layer, a surface layer, a bottom coated layer and a surface coated layer from bottom to top. The whiteness of the coated white board ranges from 78% to 88%, and the quantification of the coated white board ranges from 200g/m<2> to 450g/m<2>. The environment-friendly coated white board is characterized in that the board surface layer is made of recycled pulp from waste paper of old corrugated cartons OCC and uncolored wood pulp which are mixed, or is made of one of the recycled pulp from the waste paper of old corrugated cartons OCC and the uncolored wood pulp, the quantification of the board surface layer ranges from 40g/m<2> to 80g/m<2>, the quantification of each of the bottom coated layer and the surface coated layer ranges from 6g/m<2> to 20g/m<2>, and the total coating quantity ranges from 12g/m<2> to 40g/m<2>. The coated white board is mainly made of the unbleached recycle pulp of the waste paper, has the advantages of capabilities of saving wood resources and reducing beaching pollution, low production cost, fine printability, attractive appearance, high strength and the like, and can replace traditional coated kraft card boards and coated white-surface white boards to manufacture packaging cartons and folded cartons such as wine boxes, boxes for articles for daily life, healthcare product boxes, electronic product boxes and high-grade clothing boxes.

The invention relates to flame-retardant wallpaper base paper and a preparation method thereof and belongs to processing of flame-retardant nonwoven wallpaper base paper. The flame-retardant wallpaper base paper is prepared through the following components in parts by weight: 65 to 70 parts of wood pulp cellulose, 15 to 20 parts of chemical fibers, 10 to 15 parts of rubber latex, 1 to 3 parts of fire retardant, 1 to 3 parts of modifier, 0.1 to 0.5 parts of dry strength agent, 0.1 to 0.5 parts of wet strength agent and 0.05 to 0.2 parts of fluorescent agent. The preparation method comprises the following steps: uniformly mixing the flame retardant and the modifier at a mass ratio, thereby obtaining a modified flame-retardant solution; immediately adding the modified flame-retardant solution into crylic acid rubber latex, and uniformly mixing, thereby obtaining an a glue applying solution; soaking a base paper semifinished product in the glue applying solution, thereby obtaining the flame-retardant wallpaper base paper with stable flame-retardant property and low cost. The flame-retardant wallpaper base paper is high in whiteness and good in flame-retardant property, the flame-retardant property of the flame-retardant wallpaper base paper can reach a B1 fire-retardant standard, the high flame-retardant property can be maintained after the base paper is used for a long time, and the base paper unlikely turns yellow after being used for a long time.