598results about "Paper forming aids addition" patented technology

The invention provides a super-hydrophobic nanometer transparent coating and a preparation method thereof and belongs to the technical field of super-hydrophobic paint. The method includes the steps that firstly, a first category of inorganic nanometer particles are added into an organic solution, and ultrasonic dispersion is performed; secondly, dispersing agents and a second category of inorganic nanometer particles are added, and ultrasonic dispersion is performed so that a dispersion solution can be obtained; crosslinking agents and additives are added in the dispersion solution, ultrasonic dispersion is performed, finally, low-surface energy polymers are added, mixtures are evenly mixed, and transparent and clear super-hydrophobic paint is obtained; the surface of a solid base materials is coated with the transparent and clear super-hydrophobic paint, and the super-hydrophobic nanometer transparent coating is obtained through low-temperature thermal drying and curing. The super-hydrophobic performance of the super-hydrophobic nanometer transparent coating prepared through the method is excellent, the contact angle can be 160 degrees, the rolling angle is 1-7 degrees, the super-hydrophobic nanometer transparent coating can be sprayed to the surfaces of most of common materials, the morphology of the surfaces of the materials are not changed, and the application prospects and the application potency are very wide.

A mat containing highly machine direction oriented (90% or greater), discontinuous reinforcement fibers, is produced on inclined wire or rotary paper making machinery. Fibers are first uniformly dispersed in an aqueous medium containing thickeners and wetting agents. In one embodiment, antifoaming agents are also added to prevent floating fibers which entangle and reduce orientation. Thermoplastic fibers or particles may also be included. Stock is brought into an open headbox in a flow pattern which allows the fibers to decelerate before approaching the porous suction belt (wire). As the fibers approach the suction belt, the fibers begin to turn and align in the streamline so as to present one end toward the suction wire. The leading ends of the fibers are gripped by the moving belt which drags the fibers out of the dispersion stock in a straight line. The porous mat produced may be dried and bonded through hot air, heat and/or pressure, or chemical binders. Stacks of such mats may be compressed partially to produce porous structures, or fully to produce

The invention relates to a process for the production of paper on a paper machine containing a dilution headbox in which a main aqueous flow containing cellulosic fibres and filler is mixed in said headbox with a diluting aqueous flow to form a resulting aqueous flow which is ejected onto a wire and dewatered to form a web of paper, wherein one or more components providing improved retention are introduced into the main aqueous flow and an additive resulting in slower dewatering and/or being selected from non-ionic and anionic organic polymers is introduced into the diluting aqueous flow.

The invention relates to filter paper for an environmental-friendly automobile filter. The filter paper for the environmental-friendly automobile filter is prepared from the following components in parts by weight: 1-5 parts of far infrared ceramic powder, 2-20 parts of sepiolite nanofibers, 0.8-1.6 parts of a silane coupling agent, 0.8-1.6 parts of a diluent, 9-20 parts of a sizing agent and 60-96 parts of wood pulp. Air, fuel oil and engine oil filters made of the filter paper are obvious in comprehensive effect; pollutants generated by exhaust gas emission of an automobile are reduced by 16-47%; the dynamic performance is improved by 6-12%; fuel oil can be saved by 2-5%; the emission standard reaches the European IV standard.

Dry products, and particularly dry tissue substrates, including a blend of conventional papermaking fibers and microalgae are disclosed herein. Use of a cationic retention aid in the dry tissue substrates helps to provide a tissue sheet retaining the microalgae without being detrimental to tissue properties such as caliper, bulk, air permeability, slough and absorbent capacity. Additionally, use of a flocculating agent may agglomerate the microalgae and make it easier to retain the microalgae within the tissue sheet.

The invention discloses coated craft paper and a production method thereof. The coated craft paper comprises a core paper layer; the upper side of the core paper layer is a surface paper layer, and the lower side is a bottom paper layer; a coating layer is arranged on the upper surface of the surface paper layer; the bottom paper layer and the core paper layer are prepared by the steps of: dosing the waste paper, preparing waste paper pulp to obtain non-deinked waste paper pulp, and manufacturing paper through a paper layer to obtain a wet bottom paper layer and a wet core paper layer; the surface paper layer is prepared by the steps of: manufacturing paper through a paper layer by taking the UKP pulp, the non-deinked waste paper pulp or the mixture of the UKP pulp and the non-deinked waste paper pulp as the pulp to obtain a wet surface paper layer; and the wet bottom paper layer, the wet core paper layer and the wet surface paper layer are subjected to the steps of compounding with the coated body paper, preliminary drying, sizing, later drying, paper surface calendering, paper surface coating and after-treatment to obtain the coated craft paper. The available waste paper types are increased, and the fiber source is wider; and meanwhile, the quality of the waste paper pulp is effectively stabilized so as to guarantee the quality stability of the coated body paper and the white-surface craft paper and avoid easy layering, splitting and scaling.

The invention relates to a manufacturing method of a crepe paper product. A method for producing a paper towel comprises the following steps of: selecting 70-80 % of bleached softwood pulp and 20-30 % of straw pulp as raw materials; pulping the pulp by using a pulper, after beating the pulp by using a disc mill and adding auxiliary materials of an expanding agent, a softening agent and a wet strength agent to the pulp, molding, dehydrating and squeezing the pulp by using a Harper fourdrinier system; creping a wet paper sheet in a creping cylinder when the dryness of the wet paper sheet is 30-45 %, wherein an angle between a creping knife and the tangential line of a cylinder surface is 20-30 degrees, the cutting edge angle of a scraping knife sticking to the cylinder surface is 60-85 degrees, and the speed ratio of the creping cylinder and a heating cylinder is 1.15-1.18:1; and then drying the wet paper sheet by using the heating cylinder; and winding, rewinding and slicing the paper sheet so as to obtain a finished product. The method for producing the paper towel, provided by the invention, has the advantages as follows: through fiber variety and proportion selection and through the adoption of a wet creping process, the paper towel are produced; and the produced the paper towel has the advantages of tensile strength and proper air permeability; and the strength, wet strength, hydrophobicity, air permeability, flexibility and the like of the paper towel all reach higher standards; therefore, high quality and low cost are achieved.

The invention provides latex for papermaking. The latex contains starch, oxidants, hydrophobic modifying agents and water, wherein the dosage of the oxidants is 7-10% of the mass of starch; the dosage of the hydrophobic modifying agents is 5-20% of the mass of the starch; the hydrophobic modifying agents are selected from at least one of dodecenyl succinic anhydride, maleic anhydride, epoxy chloropropane, an alkyl ketene dimmer, alkenyl succinic anhydride, a styrene-acrylate copolymer, a silane coupling agent and a titanate coupling agent. The invention also provides a preparation method of the latex for papermaking and a coating containing the latex for papermaking. The problems that the wet strength of finished paper is poor and dusting happens easily because the paper is coated with the starch-based latex for papermaking in existing processes are solved.

The invention provides a coating used in the papermaking field. The coating contains nanometer microcrystalline cellulose, a pigment, a latex, an assistant and water, and the nanometer microcrystalline cellulose is highly-crystallized cellulose having a length of 100-500nm and a width of 3-100nm obtained by hydrolyzing a cellulose raw material in a strong acid; and the bone dry mass parts of the nanometer microcrystalline cellulose, the pigment, the latex, the assistant and water in the coating are 0.02-10, 75-95, 5-15 and 0.35-10 respectively. The invention also provides a coated paper made by using the coating. The coating is coated on the surface of paper to effectively improve the glossiness, the post-print glossiness and the roughness of the coated paper in order to improve the paper quality.

The invention relates to the field of non-woven fabric, in particular to a composite non-woven fabric and a production method thereof. The composite non-woven fabric comprises, by weight, 15-48 parts of diatomite, 20-85 parts of fiber superpolymers and 0.5-3 parts of textile assistant. According to the composite non-woven fabric, inorganic powder of the diatomite is added into textile-fiber non-woven fabric to produce the non-woven fabric with a diatomite function, namely diatomite cloth, so that a part of textile fibers are replaced to reduce cost, and the objectives of saving oil resources and energy and reducing carbon dioxide emission are achieved; hydroxide radicals of the fibers are increased, so that the problems that a non-woven fabric body is hydrophobic and airtight and does not have a heat insulation function are solved.

The invention relates to a processing method of a resin-impregnated film adhesive with low formaldehyde release. The method comprises the following steps: additionally arranging roll coating equipment in an impregnating process, hermetically coating a layer of amine-aldehyde resin by utilizing the roll coating equipment after primary impregnation of urea-formaldehyde resin, going in and out of a first section of baking oven, performing secondary amine aldehyde resin coating up and down, going in a second section of baking oven, drying and cooling, and cutting the finished resin-impregnated film adhesive. The processing method has the benefits that (1) a formaldehyde accelerant is adopted in the resin glue production process, so that relative free aldehyde in a glue solution is reduced; (2) as the roll coating equipment is additionally arranged, and the amine-aldehyde resin is hermetically coated immediately after primary impregnation and then goes in the first section of baking oven to be dried, the amine-aldehyde resin forms a good sealing layer, and the outward release probability of formaldehyde is reduced; the formaldehyde release amount of the prepared finished resin-impregnated film adhesive is reduced from original less than or equal to 1.5 mg/l to below 1.0 mg/l.

The invention relates to a producing method of wallpaper. The producing method includes following steps: (1) unreeling non-woven paper on a printing machine and feeding the non-woven paper into a coating machine; (2) coating a surface of the non-woven paper with a PVC layer through a first PVC foaming slurry material by the coating machine, and performing plastification, foaming and cooling to obtain a foamed semi-product; (3) unreeling the foamed semi-product and feeding the foamed semi-product into a circular screen printing apparatus, printing color and stereo simulative patterns on a surface layer of the foamed semi-product through a second PVC foaming slurry material by the circular screen printing apparatus, drying the foamed semi-product in hot air and cooling the foamed semi-product to obtain a printed semi-product; (4) feeding the printed semi-product into a drying oven for performing temperature-increasing foaming; and (5) feeding a wallpaper semi-product into a cooling roller for cooling the wallpaper semi-product to room temperature with circulating water to obtain the wallpaper. Compared with a method in the prior art, the method is simple in production processes. The two different PVC foaming slurry materials are employed for coating, printing and relatively matched foaming. The wallpaper has a stereoscopic and simulative decorative effect.

The invention relates to polyamide-epichlorohydrin resin sticking cylinder agent, which is used for a crinkling technique in producing tissue paper. The method of the invention comprises: taking polyamine and secondary lipid as raw materials, taking water, carbinol and ethanol as dissolvant (or not adding the dissolvent), adding little amount of activator for catalyze reaction to generate polyamide prepolymer, then, reacting with the epichlorohydrin under certain acidity-alkalinity and under the condition that stabilizing agent is existed and the temperature is 60-80DEG C, generating polyamide-epichlorohydrin resin, adjusting the pH value, cooling and discharging materials, and obtaining the polyamide-epichlorohydrin resin sticking cylinder agent. The sticking cylinder agent product of the invention has stable performance and can improve the crinkling unevenness in the crinkling technique and paper cutting phenomenon in the crinkling process when in use.

The invention discloses wallpaper base paper capable of adsorbing formaldehyde which is made by using a special process, and wall paper prepared by the wallpaper base paper has a function of adsorbing indoor free formaldehyde. Functional fibers are added into pulp of wallpaper base paper capable of adsorbing formaldehyde, so that the air permeability and the adsorption capability of the paper are improved; formaldehyde adsorbent and calcined diatomaceous earth are added into a coating solution so that an adsorption effect is improved. The base paper provided by the invention can further comprise a thin additional coating having a formaldehyde adsorption function with strong directivity; the wallpaper base paper adhered with the coating is suitable for being used in places in which a large amount of formaldehyde needs to be removed. The invention aims to protect the wallpaper base paper capable of adsorbing formaldehyde, and the wallpaper base paper capable of adsorbing formaldehyde is prepared from the following raw materials in percentage by weight: 30-80 percent of wood pulp, 15-60 percent of a functional fiber, and 5-10 percent of an auxiliary.

The invention relates to a waterproof coating, in particular to a waterproof coating of a carton, which comprises the following components in weight part: 30-120 parts of paraffin micro-emulsion, 50-90 parts of simethicone, and 4-8 parts of emulsifier. The waterproof coating is prepared according to a method as follows: (1) heating the paraffin micro-emulsion to 50-180 degree C; (2) adding simethicone and stirring for 0.5-3 hours; and (3) adding the emulsifier, stirring at a high speed for 10-40 minutes, and cooling to the room temperature. The waterproof coating of the carton, disclosed by the invention, has no pollution on the human body and the environment, can be combined with the base material firmly, and has excellent waterproof property.

A method is described for making paper or paper board by applying a composition containing enzyme and cationic coagulant to papermaking pulp prior to paper forming to preferably improve drainage, retention, or both. Sheets of pulp from which paper or paperboard products are made with the method can exhibit excellent drainage, excellent retention of pulp fines, or both. The method also can be applied to other pulp treatments, such as waste water treatments. A system for making such treatments of paper furnish is also provided.

The invention discloses a calcium stearate dispersing liquid for papermaking and a preparation method thereof. The liquid comprises, by weight percent, 30 to 60 % of water, 30 to 60 % of stearic acid, 5 to 15 % of calcium hydrate, 0.8 to 3.2 % of a dispersant, 1 to 2.5 % of an emulsifier A, 1 to 4 % of an emulsifier B, 0.3 to 0.6 % of an emulsification auxiliary agent, 0.1 to 0.8 % of an stabilizing agent, 0.4 to 3 % of a catalyst, 0.3 to 0.5 % of an antifoaming agent, and 1 to 2.8 % of a modified polyvinyl alcohol aqueous solution. The invention further discloses a preparation method of the calcium stearate dispersing liquid for papermaking. The calcium stearate dispersing liquid for papermaking and the preparation method thereof are simple to operate and suitable for industrial production, and the prepared calcium stearate dispersing liquid for papermaking is good in stability, and has greatly improved freeze-thaw stability especially.

The invention aims to replace wood veneer and technical wood by using a piece of novel decorative plate finishing paper for artificial plate veneering. A piece of base paper which is 150-350g/m<2> is adopted, the upper layer of the base paper is printed with simulated natural and precious trees which are infrequent day by day, other artistic patterns can be also innovated and printed, and a vivid effect can be achieved after lamination. Due to adoption of chemical fiber in the decorative plate finishing base paper, the paper strength can be improved, and the paper is soft and tough. The decorative plate finishing paper is mainly applicable to veneering of artificial plates such as fiber boards and chipboards, and can replace veneering materials such as wood veneer and technical wood, and the finishing paper can have flame retardancy after being coated with a flame retardant adhesive.

The invention discloses a method for preparing polyimide fiber paper, and the method comprises the following steps: firstly, carrying out dispersing treatment on a polyamide acid fiber bundle by using a standard fiber disperser, adding a fiber dispersant and a fiber binder, and then manufacturing a certain amount of polyamide acid fiber body paper in a standard paper sheet former; carrying out spraying or impregnating treatment on the polyamide acid fiber body paper by using a 1-10wt% of polyimide resin liquid, so that the polyimide resin liquid is uniformly distributed on the surface of the body paper, and drying the body paper; prepressing the body paper; and treating the body paper for 15-60 minutes at a temperature of 300-420 DEG C, and cooling the obtained product so as to obtain polyimide fiber paper. The method for preparing the polyimide fiber paper disclosed by the invention can be used for facilitating the reduction of consumption for beating and the improvement of paper evenness; and through the heat treatment on paper, a crosslinking reaction is generated among fibers, so that the binding force among fibers is increased, the strength properties of the paper are improved, and the application requirements of the paper in special fields are met.

This invention relates to one enzyme and puffing weed fiber pastry paper processing method, which combines biological science, life science and mechanic process to realize paper process without dirty water discharge. The method is characterized by the following: through grinding for clutter and mixture removing and cutting into short weed fiber materials into press machine; adding H2O2 solution and fiber enzyme B and induce agent C for pressing then for enzyme transmission and sending into puffing machine to get rough pastry.