111results about "Chemical and mechanical pulp mixture" patented technology

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.

An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.

This invention discovers a special pigment groom hectograph paper and its preparation. It utilizes the advantages of high yields machine pulp (PRC-APMP) and deink pulp (DIP) which is well thickness and green environment. That is optimizing pigment spreading formulation, optimizing pulp to materials ratio and its wet end chemical and copy making technique to reach the white value of all bleaching chemical pulp proportioning copy paper. The advantages of the products are: better printing adaptability, better relaxation thickness, better printing effect features compared with all chemical pulp hectograph paper. It's capable of producing top grade office and printing culture special pigment groom hectograph paper which is made according to different clients' requirement and selecting different optimized features' technique for different application such as laser printing, xerography and hectograph etc. So, it's capable of decreasing all chemical pulp quantity, saving wood, protecting forest, protecting environment from pollution.

An authenticable paper product is prepared from a bleached chemical papermaking furnish containing a minor but detectable amount of lignin containing fibers selected from the group consisting of mechanical, thermomechanical, chemi-thermomechanical and bleached-chemi-thermomechanical.

The invention provides a liquid packaging body paper board and a preparation method thereof. The liquid packaging body paper board consists of a backing paper layer, a core paper layer, a surface paper layer and a coating layer which are stacked in sequence, wherein the backing paper layer is prepared from the following raw materials in percentage by weight: 80-100 percent of unbleached sulfate pulp and 0-20 percent of non-dried chemical broad-leaf fresh pulp; the core paper layer is prepared from the following raw materials in percentage by weight: 10-20 percent of non-dried chemical broad-leaf fresh pulp, 50-80 percent of unbleached sulfate pulp and 5-30 percent of mechanical pulp; the surface paper layer is prepared from the following raw materials in percentage by weight: 20-80 percent of non-dried chemical broad-leaf fresh pulp and 20-80 percent of chemical needle-leaf pulp. Compared with the prior art, the liquid packaging body paper board has the advantages that the non-dried chemical broad-leaf fresh pulp is added into paper pulp of the backing paper layer, the core paper layer and the surface paper layer, and due to the specific high intensity and high stiffness as well as the high fiber bonding strength of the non-dried fresh pulp, the stiffness and the intensity of the liquid packaging body paper board are improved under a condition that the amount is fixed and is not increased; the liquid packaging body paper board has less-damage performance.

The invention relates to a bovine base solution packaging raw paper used in production of liquid packaging boxes. The base solution packaging raw paper comprises a surface layer, a core layer, a base layer and a coating layer and is characterized in that the surface layer comprises chemical hardwood pulp and softwood pulp; the core layer comprises mechanical pulp, chemical hardwood pulp and unbleached pulp; the base layer comprises unbleached pulp; and the coating layer comprises calcium carbonate, porcelain clay, adhesive, a water-retaining agent and a water repellent agent. The base solution packaging raw paper disclosed by the invention has the advantages of environment protection, low cost, high physical strength as well as good decoration property and printing performance of products, accordance with the food requirement and no harm to human bodies, wherein the using amount of chemicals is reduced so that the environment pollution is reduced, and the using amount of chemicals is reduced so that the cost is reduced.

The invention provides a copper plate card, which comprises base paper, a ground coating and a surface coating, wherein the ground coating and the surface coating are coated on both sides of base paper in sequence; the preparation raw material for base paper comprises chemical pulp, mechanical pulp, wet-end chemicals, an inner sizing agent and a surface sizing agent, and the chemical pulp accounts for 20 to 80 parts by weight, and the mechanical pulp accounts for 10 to 30 parts by weight; the ground coating comprises pigment accounting for 60 to 100 parts by weight and an adhesive accounting for 10 to 17 parts by weight; and the surface coating comprises pigment accounting for 70 to 100 parts by weight and an adhesive accounting for 8 to 15 parts by weight. The invention also provides a preparation method of the copper plate card. The copper plate card and the preparation method select and use the mechanical pulp in a suitable proportion, reduce the utilization of the chemical pulp, save natural resources such as forest, water and the like, are beneficial to environmental protection, and ensure the quality; in addition, the bulk of the energy-saving environment-friendly copper plate card with high hard fold quality is controlled within 0.95 to 1.05cm<3>/g, the folding endurance of obtained paper is good, the coating quantity on the both sides are concordant approximately, the remaining effect of printing ink on the paper surface is excellent, and the color of ink is bright.

A process for preparing body paper of wallpaper includes preparing mixed size with beating degree as 20-30 degree SR of needle leaf full bleaching chemical wood pulp, 20-30 degree SR of broadleaf full bleaching chemical wood pulp, 40-50 degree SR of self-made bivis cotton pulp and 40-50 degree SR of broadleaf BCTMP pulp; applying AKD neutral sizing in pulp; dewatering by long screen; pressing, drying; press polishing; winding and finishing to obtain said body paper. In the process, screening concentration is 0.5-0.8 %, screening size pH of 7-8 and press polishing is pressurizing mode.

The invention discloses high-whiteness pure paper and a manufacturing technology thereof. In the technology, poplar APMP pulp, needle-leave wood bleached chemical thermomechanical pulp, bleached sulfate needle-leave wood pulp and bleached sulfate broad-leave wood pulp are used for preparing pulp; CMS is added into a pulp preparation pond, wherein due to the water retaining property of the CMS, the dehydration of the high-yield pulp in a net part is slowed down, and the paper uniformity and smoothness are improved; a chelating agent DTPA is added into a white water tank so as to suppress resinaggregation and prevent drop of the pulp whiteness; and before adding the traditional retention aids CPAM and APAM, PAC is added so as to reduce the negative charges of a pulp suspension mainly containing the high-yield pulp, improve the one-pass retention of the manufacturing and increase the paper uniformity and smoothness. The quality indexes of the manufactured high-whiteness pure water are as follows: quantification is 70-80 g/m<2>, the ISO whiteness is 82-86%, the smoothness (front side/back side) is greater than 25 S, the strength of the printing surface is greater than 1.5 m/s, and the bulk is 1.5-1.6 cm<3>/g.

The invention provides a manufacturing process of ultrahigh bulk paper cup raw paper. The manufacturing process comprises the steps of pulping, blending and papermaking. A surface layer is prepared from the following raw materials in percent: 70-75% of LBKP and 25-30% of NBKP; a bottom layer is prepared from the following raw materials in percent: 65-70% of LBKP and 30-35% of NBKP; a core layer is prepared from the following raw materials in percent: 20-30% of LBKP, 10-15% of NBKP and 60-65% of APMP; the bulkiness of the APMP pulp is 3.5-3.7cm<3>/g, and the tensile strength is 14-16N*m/g; the step of papermaking is to feed three layers of blended pulp into a papermaking machine to carry out compound papermaking; the quantity of the surface layer is 25-35g/m<2>, the quantity of the core layer is 110-130g/m<2> and the quantity of the bottom layer is 35-45g/m<2>. The raw paper has high bulkiness and good flexibility and is not easy to turn and explode.

The invention discloses ultrahigh-loose thickness noodle bowl paper. The ultrahigh-loose thickness noodle bowl paper comprises a surface layer, a core layer and a bottom layer, wherein both the surface layer and the bottom layer comprise bleached needlebush sulfate pulp, and the content of the bleached needlebush sulfate pulp in the surface layer and the bottom layer is 35 to 50 percent by weight. The invention also provides a production process of the ultrahigh-loose thickness noodle bowl paper. On the premise of improving the loose thickness of the noodle bowl paper, the difficulties of curling cracking, side seepage and oil seepage can be solved.

In some variations, a process is provided for producing a pulp product at a biorefinery site, comprising: converting a woody cellulosic material to a first pulp stream; converting a non-woody cellulosic material to a second pulp stream; blending the second pulp stream into the first pulp stream; and recovering or further processing the blended pulp stream as a pulp product. Biorefinery site infrastructure may be shared between the woody and non-woody lines. Also, the process may include process integration of mass and/or energy between the woody and non-woody lines. The process may be a retrofit addition to a pulp plant, or a greenfield biorefinery site. The non-woody line also can generate fermentable sugars, for fermentation to ethanol (or other products). Through allocation of carbon credits from the ethanol to the pulp, the final pulp product life-cycle profile can be improved.

The present invention relates to a process for producing at least one ply of a paper or board product wherein a web comprising mechanical and/or chemimechanical pulp and at least one dry strength additive is dried in a press drying process by subjecting the web to heat and an overpressure of above 40 kPa. The present invention also relates to a paper product, a paperboard product and a ply produced according to the process.

Provided is a glass interleaving paper capable of suppressing scratches on surfaces of glass plates in a manufacturing process or a distribution process for storing and transporting a plurality of stacked glass plates. The glass interleaving paper is characterized in that a main component is cellulose pulp, a basis weight is 10 to 100 g/m², and content of mineral having a Mohs hardness of at least 5 is 400 ppm or less. When the mineral having a Mohs hardness of at least 5 is a silicate mineral, the glass interleaving paper is more useful.

The invention discloses a production method of lightweight paper. The production method comprises a wood pulp proportioning step and a mixing step. Needle BCMTP chemimechanical pulp and needle bleached chemical wood pulp are proportioned and pulped; a neutral sizing agent, cationic starch, cationic polyacrylamide and talcum powder are used; then a paper manufacturing process is performed. Importedneedle wood pulp and broadleaf wood bleached sulfate pulp are respectively pulped and blended, and various additives are added; the blend is conveyed into an approaching system for dehydration forming through a wet part and then is further dehydrated through a squeezing part; after pre-drying, semi-dry calendaring and surface sizing are performed, the product is dried through a drying part; the product is baked at low temperature, subjected to soft calendaring finishing and wound. First of all, high bulkiness is achieved, and the flatness and the tensile strength of paper are not affected, sothe production method is suitable for high-speed printing; secondly, no flourescent brightener is contained; compared with common coated paper, offset paper and lightweight paper, the lightweight paper produced according to the method is relatively dark and has a color close to the primary color of wood pulp, so that visual fatigue cannot be caused by long-time reading.

The invention discloses a high-quality environment-friendly recycled paper processing method, and belongs to the technical field of environment-friendly recycled products, and solves a problem in theprior art that environment-friendly recycled paper through the waste paper recycling production is lower in quality. The method comprises the following steps: (1), smashing sorted and cleaned waste paper, mixing and grinding the smashed paper and water to form paper pulp, and performing filtering and stirring to make recycled pulp; (2), making semi-finished base paper; (3), making semi-finished surface paper; (4), coating the upper surface of the semi-finished base paper with an adhesive, pasting the semi-finished surface paper on the semi-finished base paper, and compressing the paper througha roller press to make semi-finished raw paper; (5), coating the surface of the semi-finished raw paper prepared at the step (4) with surface coating liquid, and performing the drying, surface pressing and polishing, finishing and winding to obtain finished recycled paper; (6), filling a surface gap to make the surface even; (7), preparing composite gloss oil and coating the paper with the glossoil; (8), performing hot-stamping operations, and placing the paper quietly. The environment-friendly recycled paper prepared through the method is clean and flat, is higher in quality, and can be used in various fields.