14results about "Filter paper" patented technology

The present application relates to a kind of glass fiber filter paper and its preparation method and application.The glass fiber filter paper includes at least three layers of glass fiber layers, and the glass fiber layers between layer and layer are gradient arrangement;Three layers of the outer layer of the glass fiber layer is combined with non-woven fabric layer.The method includes: according to the proportion, at least three kinds of glass fiber, dispersing agent and water are uniformly mixed, and at least three kinds of glass fiber slurry are obtained;At least three kinds of glass fiber slurry are formed on the non-woven fabric laid on the paper forming net, and the glass fiber paper film is formed, is pressed and is initially dried, and at least three layers of dry paper film are obtained;At least three layers of paper film are released at the same speed, at the same time, the non-woven fabric on at least one middle layer paper film is removed, then at least three layers of paper film are glued and combined, and adhesive curing is carried out.The technical problem to be solved is how to make the thickness of glass fiber filter paper less than 0.5mm, the filter material quality less than 110g / m 2 , the breaking strength is higher than 210kPa, while the pollution capacity is higher than 160g / m 2 , and the filtering precision is better than β (10 μm) greater than 300.

A filter wrapper for an aerosol generating article according to an embodiment includes a paper layer and a coating layer arranged on at least one surface of the paper layer, wherein the coating layer includes one or more polymer resins selected from the group consisting of acryl-based resin and polyvinyl alcohol-based resin.

The present invention relates to a section of a smoking article comprising a wrapping material and a filter material, the wrapping material enclosing the filter material, at least 10% and at most 100% of the mass of the filter material being formed by a calendered fibrous web, at least 50% and at most 100% of the mass of the calendered fibrous web being formed from organic polymeric fibers, the calendered fibrous web having a compression factor C of at least 0.45 and at most 0.85.

The present invention provides a lyocell fiber with increased tendency to fibrillate, requiring a time of less than 80 minutes to obtain a 50° SR value according to ISO 5267-1: 1999 while the reduction of the working capacity [c N / tex*¾] at the 50° SR value is less than 50%, as well as a method for producing same and products comprising same.

The present invention specifically relates to a preparation method for aramid fiber filter paper, comprising the following steps: step (1), adding aramid pulp fibers into a dispersion in multiple portions and subjecting same to dispersion treatment to obtain aramid fibers with graded size distribution, wherein the dispersion comprises a dispersant, a strong base and a solvent; step (2), mixing the aramid fibers with graded size distribution with water, and performing high-speed mechanical stirring to obtain a slurry of aramid fibers with graded size distribution; and step (3), processing and forming the slurry of aramid fibers with graded size distribution into shape to obtain aramid fiber filter paper. The present invention also relates to aramid fiber filter paper and an application thereof. The aramid fiber filter paper of the present invention has high filtration accuracy and low filtration resistance, and can be used as a hierarchical composite material.

The utility model discloses a kind of nanometer filter paper material coating laminating equipment belonging to nanometer filter paper material coating laminating equipment technical field, including workbench and collection box, workbench top is fixedly connected with protective shell, workbench top is equipped with conveying device, protective shell inner top left side is fixedly connected with No. one electric push rod, No. one electric push rod bottom is fixedly connected with No. one pressing plate, protective shell inner bottom middle is fixedly connected with No. two electric push rod, No. two electric push rod bottom is fixedly connected with No. two pressing plate, protective shell top is fixedly connected with fixed frame, fixed frame inside is rotatably connected with filter paper material coating roll, collection box inner top is fixedly connected with cylinder, cylinder bottom is fixedly connected with cutter, collection box inside is clamped with placing plate, No. one pressing plate is flattened on conveying device with base film, No. two pressing plate is flattened on base film with filter paper material coating film, cutter is cut and falls into collection box after, it does not need manual cutting, save time and effort, improve work efficiency.

The application provides a hydrophobic modified cellulose air filter paper and a preparation method and application thereof, and the preparation method comprises the following steps: (1) beating bleached kraft softwood pulp board into bleached kraft softwood pulp; (2) performing mercerization treatment on the bleached kraft softwood pulp under the condition of continuous stirring by using a NaOH solution, then washing the pulp to neutral pH and dehydrating to obtain mercerized softwood pulp; (3) mixing the mercerized softwood pulp and the bleached kraft softwood pulp, then papermaking to form a raw paper; drying the raw paper to obtain a cellulose air filter paper base; (4) dissolving stearic acid in water to obtain a stearic acid emulsion; spraying the stearic acid emulsion to the surface of the cellulose air filter paper base, and drying to obtain the hydrophobic modified cellulose air filter paper. The obtained air filter paper has excellent hydrophobic performance and high mechanical strength, and can effectively remove suspended particulate matters and volatile organic compounds in air.

The present invention belongs to the technical field of filter materials, and relates to a glass-fiber-based filter material and a preparation method therefor. The glass fiber-based filter material comprises a first paper web; the first paper web is glass-fiber-based filter paper with acidified carbon nanotubes loaded on fiber surfaces; the acidified carbon nanotubes account for 2-6% of the total mass of the glass-fiber-based filter material. The acidified carbon nanotubes in the glass-fiber-based filter material provided by the present invention are uniformly loaded on the surfaces of the fibers, have high bonding strength with the fibers, do not easily detach, and have a high dust-holding capacity, a high filter efficiency and good temperature resistance, thereby meeting the usage requirements for high-cleanliness places such as medicine production workshops and clean rooms, and enabling the low energy consumption and long service life of the filter material in a high-temperature usage environment.

The application discloses a gradient composite air filter paper and a preparation method thereof. A gradient composite structure composed of a support skeleton layer, a transition bonding layer and a fine fiber filter layer is constructed in the thickness direction of the filter paper, so that the material has good structural coordination while maintaining high filtering efficiency. Through the synergistic effect of low-melting-point binding fibers and flexible bonding agents, a stable and flexible connection structure is formed between the fibers and the interlayer interface, so that each layer can deform cooperatively under stress, avoiding stress concentration. The gradient structure forms a reasonable rigid-flexible distribution in the thickness direction of the filter paper, and can realize step-by-step transition of strain under subsequent pressure and bending conditions, thereby reducing the risk of local structural instability and improving the overall structural consistency and use stability.

This application relates to the fields of polymer materials and fine chemical technology, and in particular to an organosilicon resin emulsion binder for glass fiber filter paper, its preparation method, and its application. The binder is prepared by in-situ emulsion polymerization of organosilicon monomers, silane coupling agents, organosilicon resin prepolymers, emulsifiers, and catalysts. The preparation process includes high-speed shear pre-emulsification, isothermal polymerization, and neutralization treatment. The coupling agent forms Si-O-Si chemical bonds with the fiber surface during the curing stage through dehydration condensation, constructing a three-dimensional anchoring structure. This application can significantly improve the dry and wet tensile strength of filter paper and its thermal stability at 300℃, effectively suppress silica precipitation, meet the requirements of extreme working conditions such as nuclear-grade filtration and aerospace, and features low emulsifier dosage and high emulsion storage stability.

The application discloses an ultra-high-efficiency and low-resistance nanofiber air purification filter paper and a preparation method thereof. The filter paper is composed of a three-dimensional network structure of spiral polyvinylidene fluoride nanofibers, and modified nanosilica is in-situ compounded in the fibers. In the preparation of the filter paper, the modified nanosilica and polyvinylidene fluoride are blended in an organic solvent, and a composite spinning solution is obtained through stirring and ultrasonic treatment; in the electrospinning, a receiving plate with periodic vibration is adopted to collect the fibers, spiral coiling of the induced jet flow is induced before solidification, and spiral nanofibers are formed; finally, the product is obtained through drying and hot-pressing shaping. The filter paper utilizes the elastic buffering of the spiral structure to reduce the airflow resistance and prolong the particle capture path, meanwhile, the modified particles are uniformly dispersed in the fibers, the fiber rigidity is enhanced, and the pore blockage is avoided, and the ultra-high-efficiency filtration and the low resistance are realized in cooperation.

This invention belongs to the field of tobacco paper technology, and provides a formed paper for use in paper filter rods and its preparation method. The formed paper has a three-layer gradient porous composite structure, including a permeable support layer, a high-efficiency adsorption layer, and a liquid-locking and anti-seepage layer stacked sequentially, with interconnected pores between the layers. The permeable support layer is formed from a permeable support layer slurry, the raw materials of which include low-beaten softwood pulp and cationic starch, obtained through gelatinization. The high-efficiency adsorption layer is formed from a high-efficiency adsorption layer slurry, the raw materials of which include enzymatically modified grafted fibers, tobacco-derived modified porous carbon carrier, tourmaline powder, and a foaming agent, obtained through a wet compounding and foaming process. The liquid-locking and anti-seepage layer is formed from a liquid-locking and anti-seepage layer slurry, the raw materials of which include enzymatically modified grafted fibers and modified pectin-chitosan composite adhesive, obtained through mixing and dispersion. This invention features high permeability, high tar selective adsorption rate, and high aroma retention rate.

The application provides a modified filter paper with high water removal efficiency and a modification method and application thereof. The modification method comprises the following steps: uniformly mixing a main modifier, an auxiliary modifier and water to obtain a modification liquid; the main modifier is a water-soluble polymer rich in hydrogen bond combination sites; the auxiliary modifier is a small molecule hydrogen bond breaker; a silane coupling agent is used to modify and pretreat the surface of a hydrophilic layer of a filter paper substrate; the modification liquid is coated on the surface of the hydrophilic layer of the filter paper substrate after the modification pretreatment, and the filter paper substrate is left to stand until the modification liquid is fully spread, and then the modified filter paper is obtained after drying. The present application upgrades the existing single physical layered filtration technology to a composite mode of chemical competitive adsorption-physical filtration, builds competitive combination sites on the filter paper which can actively destroy the combined water in diesel oil, realizes efficient deconstruction of the combined water and enables the combined water to be removed by the existing physical method. When the modified filter paper is used for biodiesel oil-water separation, the removal rate of the combined water is significantly improved.

To provide a filter medium for an air filter including a renewable material, having biodegradability, and having sufficient water repellency.SOLUTION: A filter medium for an air filter according to the present disclosure is a filter medium including a wet-type non-woven fabric. The fibers forming the filter medium includes beaten fibers and non-beaten fibers. The beaten fibers are fibrillated Lyocell fibers. The non-beaten fibers are biodegradable fibers. The filter medium includes an alkyl ketene dimer.SELECTED DRAWING: None