505results about How to "Reduce formaldehyde content" patented technology

The invention discloses a process for producing hexamethylol melamine, belonging to the field of production and preparation of hexamethylol melamine. The process comprises the steps such as mixing, reaction and crystallization, centrifugalization, evaporation and the like, wherein evaporation auxiliary formate is added when in evaporation so as to change the relative volatility of formaldehyde and water. Furthermore, the process for producing the hexamethylol melamine together with a formaldehyde device can also be used for co-production, so that the concentration of the produced formaldehyde solution is improved to 45wt%-55wt%. The produced hexamethylol melamine provided by the invention has the advantages of small amount of waste water and low formaldehyde content, namely, if 1 ton of hexamethylol melamine is produced, 1 ton of waste water containing 0.84wt% of formaldehyde is discharged. After the process provided by the invention and the formaldehyde device are used for co-production, the formaldehyde production cost and transportation cost are reduced, and the comprehensive cost is 10% less than that of other processes.

The invention belongs to the field of food processing and discloses a technology for processing a formaldehyde-free and benzo(alpha)pyrene-free smoked meat product. The technology comprises the following steps of 1, raw material selection and pretreatment, 2, pickling liquid preparation and pickling, 3, washing and drying in air, 4, pre-heating, drying and smoking, and 5, heat dissipation, vacuum packaging, labeling and warehousing. The technology adopts a sectional-type baking technology, improves product quality and solves the problems of meat product surface scabbing, drying and hardening caused by the traditional technology. The technology simplifies and optimizes the traditional smoking technology, shortens processing time, reduces a production cost, obviously improves product quality, and well solves the problems of meat product surface scabbing, drying and hardening caused by the traditional technology. Through the combination of the processes and use of a smoking solution which has effects of coloring and improving a taste and is safe, the formaldehyde-free and benzo(alpha)pyrene-free smoked meat product is obtained.

The invention relates to a solid wood composite floor, in particular to a production method for a low-formaldehyde solid wood composite floor. The production method comprises the technological steps of wood plate slicing, drying, repairing, selecting, gluing, pre-pressing, hot pressing, edge cutting and sanding, and finished product obtaining. The key of the production method is that the residual amount of formaldehyde in adhesives is reduced by modifying the used urea-formaldehyde resin adhesives, so that the residual amount of the formaldehyde in the solid wood composite floor is reduced; by adopting high-quality plates and controlling process parameters in the production process, the quality of the produced solid wood composite floor is guaranteed. The content of the formaldehyde in the solid wood composite floor manufactured through the method is low, the quality of the floor is stable, and the floor is not prone to damage; the floor has the characteristics of being comfortable in foot feeling, resistant to abrasion, easy to install and clean, and high in stability.

The invention provides a preparation method for high-purity methylal. A production technology has the advantage of low formaldehyde emission. According to the production technology, carbinol and formaldehyde are taken as raw materials, and a reaction rectifying technique and a variable pressure difference rectifying technique are used for preparing the high-purity methylal with the purity above 99.9%. The content of the formaldehyde in the discharged waste water is less than 500ppm. According to the whole technological process, the purity of the methylal product is promoted, the recycling use ratio of the materials is increased and the content of the formaldehyde in the waste water is reduced.

This invention discloses one environmental protection vegetation compound high school density fiberboard manufacture method. This method use straw stalk processing smashing,grinding paste, defibering, exerts urea resin rubber,preparation straw stalk executes the rubber textile fiber;then uses lumber grinding paste,defibering, exerts the urea resin rubber, preparation lumber executes rubber textile fiber, executes lumber rubber textile fiber and straw stalk executes rubber textile fiber according to the proportion mix; Executes rubber textile fiber paving to take shape, the thermo-compression becomes the high school density cellulose board; Is spatial airtight the element board through the center falls the aldehyde processing room, this processing room separated in two parts; falls aldehyde processing room to pass over the ammonia, causes the element board two sides to have the pressure difference, ammonia penetrates element board under the pressure difference function, the adjustment falls aldehyde processing room controlled variable, may prepare the E1/E0 level environmental protection high and middle density fiberboard through the physical chemistry function. This invention reduced lumber consumption, protected the environment, and reduced the production cost, this product formaldehyde content has been low, guarantee product environmental protection target.

The invention discloses a manufacturing method of a melamine ecological plate. The ecological plate is compounded with a core plate, a middle plate layer, a slab layer and melamine impregnated paper. The core plate is stuck to the middle plate layer after an upper face and a lower face of the core plate are glued. After cold pressing and hot pressing, the core plate is repeatedly maintained, trimmed and sanded, and is glued and stuck to the slab layer. Similarly, after the cold pressing, hot pressing, trimming and sanding, the core plate is glued and stuck to the melamine impregnated paper. The ecological plate manufactured by the method is energy-saving and environment-friendly, and under the condition that energy consumption is not increased, the ecological plate is cold pressed before hot pressing so that a composite structure of the plate is firmer. Furthermore, in the process of pressing and gluing the melamine impregnated paper, emulsion free of formaldehyde is used as binding agent, and accordingly formaldehyde content of the plate is reduced.

The invention discloses a formula of a formaldehyde remover made from a natural plant extract and a preparation method thereof. The raw material of the formaldehyde remover is the natural plant extract which can react with formaldehyde with high efficiency. After being prepared, the solution of the formaldehyde remover is added into adhesives, or sprayed on the surfaces of furniture or plates or sprayed into the air to make formaldehyde content of a post-processed products or space meet the requirements of national standards.

The invention discloses a chromogenic formaldehyde adsorbing material and a preparation method thereof. The adsorbing material consists of a carrier, a high molecular organic amine polymer, a polylol polymer and a formaldehyde reaction indicator, wherein the high molecular organic amine polymer and the polylol polymer account for 1 to 50 percent of formaldehyde adsorbent, the formaldehyde reaction indicator is little, and the balance being the carrier. The preparation method thereof comprises the following steps: mixing the high molecular organic amine polymer and the polylol polymer according to mass, adding deionized water to dilute the mixture so as to prepare formaldehyde reagent; mixing the formaldehyde reagent and the formaldehyde reaction indicator; and spraying or dipping the mixed solution onto the surface of the carrier, and drying the carrier and so on. The adsorbing material and the preparation method can quickly, thoroughly and continuously remove formaldehyde pollution in indoor air until the content of the formaldehyde is reduced to safe concentration, are nontoxic, pollution-free, safe and environment-friendly to use, and can intuitively show the reaction degree of the formaldehyde.

The invention provides an environmentally friendly abrasion-resistant anticorrosive coating and a preparation method thereof. The environmentally friendly abrasion-resistant anticorrosive coating is prepared from, organic silicone modified epoxy resin, acrylic acid modified polyurethane resin, bentonite, talcum powder, antirust paint, nano calcium carbonate, polyvinyl alcohol, a titanate coupling agent, a defoaming agent, a dispersing agent, a coalescing agent, a thickening agent, a flatting agent, isopropyl alcohol and deionized water. The organic silicone modified epoxy resin and the acrylic acid modified polyurethane resin are matched, the modified epoxy resin and the polyurethane resin make the coating have good glossiness, good antistatic capability, better mechanical properties and ageing resistance and abrasion resistance properties, the added antirust paint can effectively improve the anticorrosive capability of the coating, also has price and environmental protection advantages, has strong adhesion, good ductility, high temperature resistant and long service life, roll-coating replaces spray-coating during coating, a production environment is effectively improved, and the coating is conducive to the body health of workers.

The invention discloses a finishing agent composition for cotton-silk fabrics. The finishing agent composition comprises the following ingredients by weight: 120 to 180 parts of dihydroxy ethylene-urea resin, 10 to 60 parts of a powerful protecting agent, 10 to 50 parts of a smoothing agent, 30 to 80 parts of a softening agent, 10 to 25 parts of a catalyst, 5 to 10 parts of an anti-fraying agent, 1 to 5 parts of a penetrating agent, and 5 to 10 parts of a formaldehyde scavenger. The invention further provides a processing method of a cotton-silk easy-care shirt. The processing method of the cotton-silk shirt garment comprises the following steps: prewashing, drying, material spraying, pre-drying, pressing, baking, purified water washing, drying and moisture regaining, wherein the finishing agent composition is uniformly applied onto the cotton-silk easy-care shirt in the material spraying step. The finishing agent composition is used for finishing process of the cotton-silk fabrics, and can be used for overcoming the defect that the anti-sliding property of the cotton-silk fabrics is lowered after conventional easy-care treatment, reserving the own moisture permeability, air permeability and natural drapability of the cotton-silk fabrics, and enabling the cotton-silk fabrics to have relatively high easy-care property. Therefore, people can wear the shirt comfortably, and the shirt is easy to care. Moreover, the formaldehyde content of the finished cotton-silk easy-care shirt can be lower than the national standard.

The invention discloses a polyacrylic ester coating adhesive emulsion, which is prepared from the following raw materials by weight percent: 20-50% of soft monomer, 5-20% of hard monomer, 0.5-2.0% of monomer containing carboxyl group, 1-5% of crosslinking monomer, 1-5% of emulsifier, 0.2-0.7% of initiator and the balance of deionized water, wherein the soft monomer is crylic acid alkyl ester; the hard monomer is one or two of methylpropenoic acid alkyl ester and styrene; the monomer containing carboxyl group is one or more of methacrylic acid, itaconic acid and maleic acid; and the corsslinking monomer is one or two of non-formaldehyde crosslinking monomer and inner crosslinking monomer containing two or more double bonds. The emulsion has good safety, no toxicity, low cost, high hydraulic pressure resistance, wide application range and the content of the formaldehyde of the coating accords with the European Union exit criteria. The invention also discloses a preparation method of the polyacrylic ester coating adhesive emulsion, which is simple to operate and is suitable for industrialized production.

The invention relates to a photocatalystc composite floor board, and belongs to the field of a functional environment-friendly healthy floorboard. The formaldehyde emission content of the composite floorboard is less than 0.3mg/L; the antibacterial rate is higher than or equal to 90 percent; the surface wear-resistant coefficient is less than or equal to 0.08g/100r; a substrate layer is an oriented shaving board layer; the oriented shaving board layer comprises an upper surface layer and a lower surface layer which are formed by glue mixing wood shavings in longitudinal arrangement according to the fiber direction and a core layer shaving layer formed by glue mixing wood shavings in transverse arrangement according to the fiber direction; and a decoration layer, a wear-resistant primer layer and a photocatalystc antibacterial paint decoration layer are sequentially arranged on the substrate layer. A production process of the photocatalystc composite floor board comprises the steps of shaving board layer sorting, glue preparation, glue distribution and assembling for the first time, cold pressing for the first time, core trimming, glue distribution and assembling for the second time, cold pressing for the second time, hot pressing for the first time, fixed-thickness sanding, edge cutting, puttying, polishing, sorting, reconditioning, glue distribution and veneering, cold pressing for the third time, hot pressing for the second time, multi-blade sawing, sanding, double-end milling, priming, finish paint preparing and finish paint painting. The composite floorboard has the advantages of good antibacterial function, high strength, good wear-resistant performance and comfortable foot feeling.

The present invention discloses the process of making artificial board with the crop stalk and timber. The process includes the following steps: mixing processed timber material and processed crop stalk material in a dry material bin, mixing with glue in a glue mixing machine, spreading in a spreading machine to form board blank, pre-pressurizing in a continuous pre-pressurizing machine, hot pressing in a hot press to form coarse board, cooling in a board cooling machine, and cutting in a margin cutting machine to obtain artificial board. Making artificial board with the crop stalk and timber can save timber and make artificial board with high quality.

The invention relates to a method for continuous production of high-concentration methylal. The method is characterized by adopting methanol and formaldehyde for feeding respectively, controlling the content of each of formaldehyde and the methanol in each reactor and enabling the lowermost side reactor to adopt the process of enabling reactants of feed material of an upper-stage column plate to enter a lower-stage column plate; and the method comprises the following steps: a) a reaction rectification column is a packed column, formaldehyde is fed at the upper part of the reaction section, and methanol is fed through an inlet of the uppermost side reactor and the inlet of the lowermost side reactor; b) the reaction temperature of the side reactors is 60-80 DEG C from top to bottom, and liquid-phase reaction is performed on methanol and formaldehyde in the reactors to generate methylal; c) except for the lowermost side reactor, each reactor adopts the way of enabling extracted liquid from the lower-stage column plate of the rectification column to enter the reactor, and enabling reactor products to enter the upper-stage column plate of the rectification column; d) the lowermost side reactor adopts the way of enabling the extracted liquid from the upper-stage column plate of the rectification column to enter the reactor and enabling the reaction products to enter the lower-stage column plate of the rectification column; and e) the gas phase at the top of the column is condensed, then part of the condensed gas phase refluxes into the rectification column, and the other part of the condensed gas phase is extracted and introduced into a methylal intermediate storage tank; and liquid discharged from a column kettle is returned into a formaldehyde preparation unit for recycling or discharged after the liquid is treated to achieve the standard.

The invention discloses a method for producing particle board by adopting moisture-proof composite urea resin. The method comprises the steps of material preparation, drying, debarking, sand removing, sorting, grinding, glue blending, hot pressing molding and the like. The key points of the production method disclosed by the invention are that melamine modified urea resin is adopted as a main material of an adhesive and is added with oxidized starch to form a viscous compound, polyvinyl alcohol is taken as a toughening agent, magnesium oxide is taken as an antiaging agent, hexamine and triglycidyl isocyanurate are taken as a curing agent, isobutyl triethoxy silane is taken as a bridging agent, phenolated lignin is taken as a formaldehyde catcher and a moisture-proof agent is also added to prepare the moisture-proof composite urea resin; the composite urea resin has the advantages of being low in formaldehyde residual volume, good in water resistance and good in moisture resistance; therefore, the produced particle board is low in formaldehyde residual volume, hard to expand after absorbing water and hard to arch and deform, and a wear-resistant layer is hard to damage. The particle board produced by the method disclosed by the invention is low in formaldehyde residual volume, also stable in quality, hard to damage, good in water resistance and good in moisture resistance.

A resorcinol-modified phenolic resin composition is formed by reacting a basic catalyst, formaldehyde, water and a benzene-ol to form an intermediate composition to which resorcinol is subsequently added to reduce the presence of free formaldehyde. Optionally, an alkanolamine can be combined and reacted with the resorcinol-modified phenolic resin composition to form a resorcinol-alkanolamine-modified phenolic resin composition. The resorcinol-modified phenolic resin and the resorcinol-alkanolamine-modified phenolic resin compositions can be employed to coat abrasive products having a relatively low free formaldehyde content.

The invention discloses a production method for a fireproof, flame-resistant, medium-density fiber closet plate. The method comprises the steps of (1) preprocessing of raw materials, (2) screening, (3) steaming and boiling for softening, (4) grinding, (5) sizing and drying, (6) prepressing, (7) hot pressing, (8) sawing and sanding, (9) veneering and hot pressing and (10) edge cutting. In this way,a finished product is obtained. The method disclosed by the invention is characterized in that eucalyptus barks and branches and waste leftover bits and pieces left after panel manufacture are takenas main raw materials, other miscellaneous wood is added and waste is recycled, so wood resources can be utilized fully and effectively; and modified paraffin and flame-resistant urea-formaldehyde resin adhesive are added, so resistance of the product to fire and flame is greatly enhanced. The medium-density fiber cabinet plate is highly resistant to fire, flame and water and low in the content offormaldehyde, so the product is a safe and environment-friendly closet plate.