13results about How to "Reduce formaldehyde content" patented technology

The invention discloses a method for preparing high-strength low-formaldehyde melamine foam, which comprises the following steps: uniformly mixing phenolic fiber with an aldehyde compound, phenol and melamine which are added according to a certain molar ratio, heating to a certain temperature in a weak alkaline environment, and reacting to prepare expandable melamine resin; uniformly stirring the obtained melamine resin with foaming substances such as a foaming agent and a curing agent to obtain foaming liquid, and performing microwave foaming and high-temperature curing to obtain melamine foam. According to the prepared melamine foam, the mechanical property and the flame retardant property of the foam are improved, and the formaldehyde content is reduced.

The invention discloses a polymer capable of simultaneously releasing far infrared rays and negative ions and a preparation method thereof. Comprising the following components in parts by weight: 0.1-45% of micromolecular pure water color paste, 40-85% of epoxy resin emulsion, 0.1-3% of propylene glycol, 2-10% of an epoxy curing agent, 0.5-5% of an imidazole dispersing aid, 0.2-12% of rutile titanium dioxide powder, 2-10% of light rare earth powder, 2-21% of a coating interface agent and 0.5-10% of special mineral powder. The prepared polymer can release far infrared rays and negative ions at the same time, the attenuation of each year is not larger than 1.2% of the average generation amount of the last year, the amount of released negative ions is 3000-6000 / cm < 3 >, and when the polymer is applied to different places and fields, metabolism of a human body can be promoted, and human health is facilitated.

The present invention belongs to the technical field of textile processing, and specifically relates to a processing method for reducing the formaldehyde content and long-term release of pure cotton non-ironing fabrics. The method comprises: (1) washing the pure cotton fabric that has not been subjected to non-ironing finishing for the first time, applying isopropyl alcohol first and then applying nanobubbles in the first washing process; (2) non-ironing finishing; (3) washing the pure cotton fabric after non-ironing finishing for the second time, applying soda ash first and then applying nanobubbles in the second washing process; (4) padding a formaldehyde scavenger in the stenting process. By fully removing the residual alkaline substances and free formaldehyde that is not cross-linked with cotton fibers in the pure cotton fabric in the washing process before and after the non-ironing finishing, the formaldehyde content is effectively reduced and its long-term release is avoided. At the same time, by padding the formaldehyde scavenger in the stenting process, the formaldehyde is fixed or converted into harmless substances, thereby achieving long-term and lasting safety. In addition, the washing process also helps to cross-link the resin with the cotton fibers, thereby improving the anti-wrinkle and non-ironing effect of the fabric.

The invention discloses a method for preparing a low-formaldehyde melamine foam material, which comprises the following steps: firstly, adding an aldehyde compound, melamine and urea according to a certain molar ratio, uniformly mixing, heating to a certain temperature in a weak alkaline environment, and reacting to prepare expandable melamine resin; then uniformly stirring the urea formaldehyde fibers, melamine resin, a foaming agent, a curing agent and other foaming substances to obtain a foaming solution, and carrying out microwave foaming and high-temperature curing to obtain melamine foam. According to the prepared melamine foam, the strength is improved, the aldehyde content is reduced, and meanwhile the excellent flame-retardant and heat-insulating properties of the melamine foam are kept.

The invention belongs to the technical field of melamine-based foam materials, and particularly discloses a melamine resin prepolymer modifier and a preparation method of hot-pressed non-rebound low-formaldehyde melamine-based foam. The preparation method comprises the following steps: firstly, carrying out polycondensation dehydration on a catalyst, diglycolamine and melamine to prepare a modifier; the preparation method comprises the following steps: controlling the feeding ratio of melamine to formaldehyde, adding sodium pyrosulfite, regulating and controlling the pH value of a reaction solution, preparing a resin prepolymer by adopting a constant-temperature reaction, adding a modifier before a reaction endpoint, continuing the reaction to the endpoint, and then adding a high-temperature formaldehyde catching agent; and then emulsifying with a functional auxiliary agent at a high speed, foaming by combining microwave gradient foaming and thermal radiation to obtain a primary foam product, and curing the foam by combining microwaves and wet and hot steam to obtain the product. The product has excellent flame retardance, weather resistance, sound absorption, mildew resistance, corrosion resistance, workability and the like, and can be applied to the fields of sound insulation, heat preservation, shock prevention, fire prevention, decoration filling, cleaning and the like.

The invention relates to the field of bamboo processing, and particularly discloses a bamboo board production method which comprises the steps that S1, bamboo processing waste is dried, smashed and then sieved, and smashed bamboo particles are obtained; s2, the crushed bamboo particles are taken and added into a bamboo adhesive, gypsum powder and water to be evenly mixed, and then the mixture is put into a mold; and S3, the mold is put into a carbonization furnace to be carbonized, pressing is conducted immediately after carbonization is finished, and the high-quality plate is obtained. The bamboo waste comprises leftover materials, leftovers and bamboo tips left in the processing process of bamboo products. The method disclosed by the invention is simple to operate, the used raw materials are low in price, and the method is suitable for process production and has popularization prospects. The bamboo board prepared by the invention is compact in structure, high in strength, bright in color and low in formaldehyde content, and is a bamboo artificial board with extremely high quality.

The application discloses a vehicle formaldehyde monitoring method, a vehicle formaldehyde monitoring device, an electronic device, a storage medium and a vehicle. The method comprises the following steps: acquiring vehicle seat pressure detection information; generating vehicle seat material extrusion state information according to the vehicle seat pressure detection information; acquiring vehicle seat formaldehyde detection information; obtaining fluctuation information of formaldehyde released under the vehicle seat material extrusion state according to the vehicle seat material extrusion state information and the vehicle seat formaldehyde detection information; and evaluating the vehicle formaldehyde release state according to the fluctuation information of formaldehyde released under the vehicle seat material extrusion state. Through the above scheme, the formaldehyde release fluctuation generated by the extrusion of the vehicle seat when being sat on is detected, the vehicle formaldehyde release state is evaluated, and the characteristics of the vehicle seat in releasing and absorbing formaldehyde are considered in the formaldehyde detection method. Therefore, the attenuation degree of formaldehyde in the vehicle cabin can be indirectly learned in a shorter time.

The utility model discloses a kind of connecting structure for wooden furniture, it is related to furniture technical field.The utility model includes desktop, fixed groove is opened in the periphery of desktop, fixed groove inside is movably connected with fixed block;Fixed block side is fixed with connecting plate, connecting plate side is fixed with table leg;Fixed block side is opened with first positioning slot, desktop side surface is opened with second positioning slot;First positioning slot and second positioning slot inside are movably connected with positioning block;Second positioning slot side is opened with placing groove, placing groove and connecting plate bottom are opened with adjusting groove;Adjusting groove inside is slidably connected with handle, handle side is fixed with push plate.The utility model is through the effect of table leg, the device is through the realizable assembly connection of desktop and table leg, compared with traditional connection mode, without using screw, nail and other metal connecting piece, avoid in wood surface punching or exposed metal component, and without glue bonding, reduce the formaldehyde content of the device.

The invention discloses an air purification device for building decoration, and relates to the technical field of air purification, the air purification device comprises a box body, the inner wall of the bottom of the box body is provided with a filter assembly, and the filter assembly is used for filtering solid particles in gas; the purification assembly is arranged on the inner wall of the top of the box body, and the purification assembly is used for adsorbing formaldehyde in the gas; and the air supply assembly is arranged on the side wall of the box body, and the air supply assembly is used for introducing fresh air into a room. During decoration work, the exhaust assembly and the air supply assembly work at the same time, outdoor fresh air can be supplied indoors, indoor air can be output outdoors, indoor air can be replaced to the maximum extent, and during non-decoration work, circular flowing of the indoor air is achieved through work of the exhaust assembly, so that the indoor air can be replaced to the maximum extent. And in cooperation with formaldehyde adsorption of the purification assembly, formaldehyde removal work is continuously conducted on indoor air in the non-decoration work period.

The utility model relates to the technical field of decorative plates, and discloses a honeycomb reinforced metal surface heat preservation decorative plate which comprises an installation base frame, a plurality of identical waved plates matched with the interior of the installation base frame are arranged in the installation base frame, each waved plate is provided with a plurality of inserting grooves, and the waved plates are in a honeycomb shape after passing through the inserting grooves. A panel is arranged on one side of the mounting base frame, a connecting unit is arranged between the panel and the mounting base frame, and the panel is fixedly mounted on the mounting base frame through the connecting unit. According to the decorative plate, the whole decorative plate can be assembled and disassembled, the waved plate is assembled in the mounting base frame through the inserting groove, and the panel is mounted on one side of the mounting base frame through the connecting unit, so that the formaldehyde content after the decorative plate is mounted is reduced, the damaged panel or waved plate can be independently replaced, the use cost of the decorative plate is reduced, and the service life of the decorative plate is prolonged. And later maintenance is facilitated.

The preparation process comprises the following steps: adding a formaldehyde solution into a reaction kettle, adjusting the pH value of the formaldehyde solution by using sodium hydroxide, adding urea for the first time, starting a stirrer, carrying out a heating reaction, increasing the reaction temperature, adding urea for the second time, carrying out a stirring reaction, increasing the temperature, and carrying out cooling, so as to obtain the high-flame-retardant environment-friendly urea-formaldehyde resin adhesive. After the reaction is finished, adding the modified aluminum triphosphate formaldehyde trapping agent into the reaction kettle, uniformly stirring, cooling to room temperature, and discharging, so as to obtain the high-flame-retardant and environment-friendly urea-formaldehyde resin adhesive. The preparation process is simple, the obtained urea-formaldehyde resin adhesive is low in price, basic adhesion requirements of shaving boards can be met, release of formaldehyde of the shaving boards can be reduced, flame retardance of the shaving boards can be improved, and environmental protection and safety of the shaving boards are greatly improved.

According to the synthetic method, the formaldehyde content of the resin is remarkably reduced by optimizing the steps of hydroxymethylation, etherification and neutralization, sedimentation and filtration, dealcoholization and dehydration and the like in combination with a Well-CD formaldehyde-removing odor-masking agent with a specific ratio, and meanwhile, the resin is endowed with excellent aroma enhancement and adsorption properties. According to the method, a functional group with an aroma enhancement function is introduced into an amino resin molecular structure, the odor problem of traditional resin is solved, and the environment-friendly target of reducing volatile odor from the source is achieved. Experimental results show that compared with a traditional method, the prepared amino resin has the advantages that the formaldehyde emission is reduced by 50% or above, the fragrance durability is improved by 30%, and the amino resin has better environmental friendliness and use experience and is suitable for the fields of coatings, adhesives, textiles and the like.

The invention relates to polyvinyl alcohol sponge with low formaldehyde content as well as a preparation method and application of the polyvinyl alcohol sponge. Amino and hydroxyl co-grafted hydroxyapatite is added into preparation raw materials of the polyvinyl alcohol sponge. Formaldehyde molecules can be adsorbed to the surface of hydroxyapatite through acting force between amino grafted on the surface of hydroxyapatite and formaldehyde molecules, and primary amine and formaldehyde are converted into relatively stable methylene imine through amination reaction of formaldehyde under a heating condition. Hydroxyl grafted on the surface of hydroxyapatite is easier to participate in cross-linking reaction of polyvinyl alcohol, so that nano-hydroxyapatite can be uniformly and stably dispersed in polyvinyl alcohol sponge, the catalytic performance of nano-sized hydroxyapatite is improved, and loss of hydroxyapatite in the cleaning process can be effectively avoided. The polyvinyl alcohol sponge disclosed by the invention has excellent mechanical properties and relatively low formaldehyde content, and is suitable for preparing a medical nasal cavity filling hemostatic material.