707results about "Defoamers addition" patented technology

Antifoam formulations contain a siloxane antifoam and a polyether/polysiloxane copolymer of the general formulawherein R* is either R, R', or R'', and wherein R' isand wherein R'' iswherein R, R1, R2, a, b, c, d, e, f, x, y, and z are defined herein.

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 provides a foam control formulation in the form of a microemulsion, the formulation comprising: (a) from S to 70% w/w of primary surfactant, this surfactant having an HLB of from 1 to 12 and/or a cloud point of from 20 to 70° C.; (b) from 2 to 40% w/w of water-insoluble organic carrier liquid; and (c) water. Also provided is the use of this formulation to prevent and/or reduce foam in a fluid system, or as a processing aid to control foam production in a fluid system. The formulation may be used in an aqueous fluid system, such as an oilfield.

The invention relates to a white craft paper and a production method thereof, and belongs to the pulping papermaking production field. The white craft paper comprises a surface layer, a core layer, a substrate and surface gluing layers (comprising a right-side gluing layer and a wrong-side gluing layer). The quantitative range of the white craft paper is 125-200g/m<2>, wherein the weight ranges of the surface applying layers, the surface layer, the core layer and the substrate are 2-5g/m<2>, 20-24g/m<2>, 30-35g/m<2> and 75-150g/m<2>. The invention also relates to the making method of the white craft paper which is a gluing squeezing making technology. The white craft paper produced through the making technology has the advantages of high whiteness, high strength, good printing performance, low cost and environmental protection, and can satisfy clients' requirements.

The invention relates to a water-based dispersion and a preparation method thereof, wherein the water-based dispersion takes calcium stearate as the main component and is used for papermaking; and the dispersion is mainly used as an auxiliary, a functional auxiliary and a coating lubricant in the papermaking and coating processes. The dispersion is formed by processing the calcium stearate, an emulsifier A, an emulsifier B, an auxiliary, a dispersing agent, a defoamer, a fungicide and water; and the production comprising the steps of: adding the calcium stearate, the emulsifier A, the emulsifier B, the auxiliary, the dispersing agent, the defoamer, the fungicide and the water into a high-pressure reaction kettle according to a certain proportion; sealing the high-pressure reaction kettle and heating to 160-190DEG C; mixing the materials at a constant temperature for 1h; and then rapidly cooling to the room temperature so as to obtain the target product. According to the proportion and the method, the viscosity range of the prepared water-based calcium stearate dispersion is 90-680mPa.S, the particle size range is 0.45-5.0 microns and the solid content is 39-75wt%. The water-based calcium stearate dispersion has the advantages of simple process, high efficiency, no color reversion of the product, no odor, no pollution and the like; and the particle size, the solid content and the viscosity are adjustable.

An oil-in-water emulsion useful as a defoamer for pulp and paper mill applications is described. The defoamer has an oil blend (of a triglyceride oil or a mixture of triglyceride oils and silicone), a stabilizing agent (to make the oil blend stable in the emulsion), hydrophobic silica particles, surfactants, dispersants, and other components. The emulsion is usable directly at low concentrations to control foam.

The invention discloses a preparation method of polyimide fiber paper, and belongs to the field of paper-making industries and materials. The method comprises the steps that polyimide chopped fiber is treated by a chemical reagent, the treated fiber is washed to be neutral, then, the fiber, a binder and a dispersing agent M are mixed according to a certain mass ratio, the fiber raw materials are dispersed into a pulp suspension, papermaking is performed through a paper making machine to obtain raw polyimide fiber paper, and finally hot pressing is performed through a hot press to obtain the polyimide fiber paper. According to the preparation method, the fiber is subjected to modification treatment, fiber surface active groups are added, the fiber surface energy and roughness are improved, the binding force of components in paper pages can be improved, the binder flows in the paper pages to achieve the effect of viscose fiber through hot pressing and melting, the preparation method can remarkably reduce chemical auxiliaries added in the polyimide fiber raw paper making process, environmental pollution caused in the paper making process can be reduced, and the mechanical performance, the electrical performance and the gas permeability of the polyimide fiber paper can be effectively improved.

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.

(A) Siloxane-based antifoams and

• (B) silicone polyethers prepared by reacting
• organopolysiloxanes (1) containing 0.05% to 1.6% by weight of Si-bonded hydrogen atoms
• with unsaturated polyethers (3) of the formulae:

CH₂═CR¹—(CH₂)_aO(C₂H₄O)_bR¹  (Ia)

CH₂═CR¹—(CH₂)_aO(C₂H₄O)_b(C₃H₆O)_cR¹  (Ib)

CH₂═CR¹—(CH₂)_aO(C₃H₆O)_cR¹  (Ic),

where

• R¹ is a hydrogen or a C_1-6 hydrocarbon radical,
• a is 0 to 16,
• b is 1 to 50, and
• c is 1 to 50,
• wherein the sum b+c is ≧10 and at least two different polyethers (Ia), (Ib) and (Ic) are used, and
• optionally further reacting the reaction product
• with organopolysiloxanes (2) containing from 0.01% to 0.5% by weight of Si-bonded hydrogen atoms,
• wherein the first and second step reactions take place with a hydrosilylation catalyst, and the weight ratio of Si-bonded hydrogen in organopolysiloxane (1) to Si-bonded hydrogen in organopolysiloxane (2) is at least 1.5.

The invention provides a defoaming agent for a boxboard paper making, which belongs to the field of chemical preparation special for papermaking, and is characterized in that the invention consists of the following components. (1) 5 to 40 percent organic hydrocarbon defoaming mixture consists of organic hydrocarbon and superfine particles consisting of hydrophobic inorganic particles, a surface area of which is bigger than 50m²/g, and organic particles such as ethyl pillared double stearic amide (EBS), aluminum stearate, MQ silicone resin and so on; (2) 1 to 30 percent fatty alcohol; (3) 5 to 70 percent fatty alcohol polyether; (4) 5 to 50 percent fatty alcohol polyether; (5) 5 to 60 percent common group modified polyether; (6) 1 to 10 percent polyether organic silicon modification, also simply called 'silicon polyether'. The invention is a cheap and high-efficiency defoaming agent for a linerboard paper making, improves the performance by complex and increasing effect of the components, and further solves the problem of the foams in the boxboard production system.

The invention discloses water-based halogen-free flame-retardant paper and a preparation method thereof, aiming to provide a non-toxic and pollution-free water-based halogen-free flame-retardant paper with no influence on the environment caused by combustion products and good flame retardant property and a preparation method thereof. A flame-retardant layer is coated on the surface of the raw paper of the flame-retardant paper, the flame-retardant layer is obtained by drying flame-retardant solution, the flame-retardant solution is composed of flame retardant, glue solution and defoaming agent, the flame retardant is composite flame retardant compounded from two of magnesium hydroxide, aluminium hydroxide, antimonous oxide and micron-sized or nanoscale hydrotalcite or antimonous oxide is used as the flame-retardant layer, the glue solution is mixed by polyvinyl alcohol and carboxymethylcellulose, single-face paper coating weight of the flame retardant is 16-30g/m<2>, and the defoaming agent accounts for 0.1wt% of the total weight of the polyvinyl alcohol and carboxymethylcellulose. The flame-retardant paper disclosed by the invention takes mixed solution of water-based polyvinyl alcohol and carboxymethylcellulose as the glue solution, and halogen-free flame retardant is added, thus the flame-retardant paper is non-toxic and environmentally friendly; meanwhile, the combustion product produces no influence on the environment, and the flame-retardant paper has good flame retardance.

A process for preparing carbon fiber screening paper is provided. The invention includes the following steps: mixing chopped carbon fiber and plant carbon fiber in a certain proportion, adding certain amounts of a dispersant and a defoaming agent, dispersing on a fluffer, and papermaking in a paper former. While the light weight of material is guaranteed, the paper is endowed with good screening performance and easy process, which make full use of the advantages of large scale production in the papermaking industry. Furthermore, the paper electric conductive screening performance can be controlled by adjusting and quantifying the amount of the carbon fiber. The carbon fiber screening paper, which is an electric conductive material with high performance, replaces the conventional electric conductive screening material and covers the shortages thereof. The prepared screening paper has good screening performance of electromagnetic waves, the screening effectiveness at 100KHz-1500MHz is more than 30dB and the maximum is 50dB, thereby being generally applicable to radiation protection and anti-interference of common commercial or electronic products.

The invention provides an anti-foaming agent for a papermaking system. The anti-foaming agent consists of advanced fatty alcohol, advanced fatty alcohol polyether, aliphatic ester, organic silicon composition, emulsifying agent and water. The anti-foaming agent can effectively eliminate the harmful foam in the processes of papermaking, coating, pulp washing, sewage treatment and the like in the industries of coating and starch processing and the like and the papermaking industry, the performance of the anti-foaming agent is not affected by temperature, and the problem of foam elimination under the jointed foam stabilizing condition of multiple surfactants can be well solved.

The invention relates to an environmentally-friendly aqueous matte aluminized paper undercoating paint and a preparation method as well as application thereof. The paint comprises the following component raw materials in parts by weight: 5-20 parts of aqueous acrylic resin, 0.5-8 parts of neutralizing agent, 50-70 parts of aqueous acrylic emulsion, 10-20 parts of aqueous polyester emulsion, 1-5 parts of aqueous wax slurry, 20-45 parts of cosolvent, 20-80 parts of de-ionized water, 0.1-0.3 part of moistening agent, 0-0.2 part of rheological control agent and 0.05-0.2 part of defoaming agent, and can be used for surface treatment of cigarette inner lining paper. Compared with the prior art, the paint has the advantages of aqueous environmental friendliness, high metal glossiness, superior coverage and wear resistance; and the problem that directly plated paper made by the conventional paint cannot achieve effects of metal feeling and flatness of a matte aluminum foil is solved.

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 process for producing printed decorative raw paper by using recycled waste paper. The process comprises the steps of waste paper treating, pulping, defibrinating, pulp preparing and papermaking, wherein the step of waste paper treating comprises the steps of mixing 80-90 wt% of waste paper and 10-20 wt% of chemical auxiliaries and then mixing with water at the temperature of 40-50 DEG C to prepare waste paper pulp with pH value being 8.0-9.0 and mass percent concentration being 6.0-8.0%; the step of pulping is characterized by mixing the waste paper pulp, wood pulp, kaolin, titanium dioxide, pigment and other raw materials with water to prepare pulp with a certain concentration; and the step of pulp preparing is characterized by adding a certain amount of a wet strength agent, a retention agent such as alum and an auxiliary to the defibrinated pulp to prepare pulp with a certain concentration. According to the invention, the treated waste paper and wood pulp are proportionally mixed to produce impregnated titanium oxide paper made from recycled waste paper; and all the quality indexes of the decorative raw paper can meet the requirements of the decorative raw paper; and the consumption and cost of the raw materials can be reduced and great economic and social benefits can be achieved.

A natural high class fatty alcohol emulsion and a preparation method thereof belong to the technical field of fine chemical preparation. The natural high class fatty alcohol emulsion is characterized by comprising natural high class fatty alcohol, paraffin, polyether, alkyl polyglucoside (APG for short), thickening agent and water. The preparation method comprises the following steps: A. mixing natural high class fatty alcohol and paraffin in proportion, heating to 70-90 DEG C to obtain mixture (1); B. dissolving polyether and APG in hot water of 70 DEG C to obtain mixture (2); C. adding mixture (1) slowly into mixture (2), and then using an exorbitant shearing device to further emulsify to obtain a crude emulsion; D. supplementing corresponding water quantity to dilute into the required concentration; and E. using the thickening agent to adjust the viscosity of the product to 250-400mPa.s to obtain the natural high class fatty alcohol emulsion. The prepared natural high class fatty alcohol emulsion has good degasification performance in paper-dipping procedure of paper-making and excellent usage in paper-making industry.

The invention relates to an environmentally-friendly quick drying aqueous glass imitation card transfer paint and a preparation method as well as application thereof. The paint comprises the following component raw materials in parts by weight: 80-95 parts of aqueous resin, 0-8 parts of cosolvent, 0-8 parts of de-ionized water, 0-3 parts of filming auxiliary agent, 0-3 parts of anti-scratch agent, 0-0.5 part of moistening agent, 0-0.2 part of rheological control agent and 0-0.3 part of defoaming agent, and can be used for manufacturing glass imitation card paper or glass imitation copper plate paper. Compared with the prior art, the paint has the advantages of environmental friendliness, low smell, low VOC (Volatile Organic Compound), cost advantage, low production cot, high solid content, high drying speed, superior stripping property, high smoothness, high glossiness, simple application process, capability of recycling a transfer thin film for multiple times, no need of passing through a large-diameter mirror chromium plating drying cylinder like the conventional glass card and high printing adaptability.

The invention discloses a method for dispersing a higher fatty alcohol mixture, which provides a method for dispersing a mixture of natural fatty alcohol and synthol into water, and belongs to the technical field of fine chemical preparations. A higher fatty alcohol emulsion prepared by the method contains the following components: (1) 1 to 30 percent of synthesized higher fatty alcohol with carbon number of between 14 and 30; (2) 1 to 15 percent of C12-18 saturated natural higher fatty alcohol; (3) 1 to 15 percent of paraffin; (4) 0.1 to 5 percent of non-ionic surfactant with MO(EO)m(PO)nH as a general formula; (5) 0.1 to 5 percent of one or more anionic surfactants selected from sulfonated ricinate, sulfonated fatty glyceride, alkyl sulfate, alkoxy sulfate, alkylaryl sulfonate and sodium polyoxyethylene alkyl ether sulfate; (6) 0.1 to 5 percent of thickening agent; and (7) 60 to 95 percent of dispersant (water), wherein M is an initiator group of the non-ionic surfactant, alkyl or an benzene ring. The method comprises the following realization steps that: (1) the synthesized higher fatty alcohol, the natural higher fatty alcohol, the paraffin, the non-ionic surfactant, and the anionic surfactants are mixed according to the proportion, and then the temperature is increased to be between 80 and 95 DEG C; (2) then the water with a temperature of between 60 and 80 DEG C is slowly added into the mixture to begin to emulsify, and the emulsification temperature is kept higher than 60 DEG C during the emulsification; (3) the obtained product passes through a colloid mill after the adding of hot water; and (4) finally the obtained product is cooled to be between 30 and 40 DEG C, then the thickening agent is added into the obtained product to be mixed evenly, thus the higher fatty alcohol emulsion is obtained.