18results about "Ageing prevention agents addition" patented technology

The invention discloses environment-friendly release paper and a preparation method thereof, and relates to the technical field of release paper, the environment-friendly release paper specifically comprises a base material layer, a priming coat and a release layer, the base material layer is made of a recyclable material; the base material layer is made of renewable fibers, graphite powder and iron powder, the surface of the base material layer is coated with the bottom coating layer, the bottom coating layer comprises main components and auxiliary components, and the main components comprise but are not limited to water-based acrylic resin, polyvinyl alcohol, water-soluble polyurethane and modified cellulose ether; the auxiliary components comprise antistatic particles and water-absorbing fibers. Through the arrangement of the water-soluble priming coat, when the release paper is recycled, the base material layer and the release layer can be rapidly separated through the water solubility of the priming coat, recycling of the base material layer is facilitated, the water solubility speed of the priming coat can be increased through the water-absorbing fibers, and then the recycling speed of the release paper is increased.

The present invention addresses the problem of producing a fibre-based material such as paper, paperboard or cardboard, for example, which dispenses / releases flavourings, nutrients, additives and / or starch on contact with water (e.g. hydrolysis). Fibre-based materials of the type in question are not known. According to the invention, this problem is solved in that the cellulose fibres used in paper production are subjected to a method (treatment) that opens (splits) the hydrogen bridge-type bonds between the H and O atoms. This method is characterised in that the cellulose (cellulose fibres) is dissolved in liquid (e.g. water) and is brought to boil above the boiling point. Then, sweeteners (e.g. cyclamate, saccharin, thaumatin, fructose) and acidifiers such as citric acid and preservatives such as sorbic acid / potassium sorbate are added. Furthermore, the desired reactions / functions to be released, such as flavourings, nutrients, additives and / or starch, are added to the boiling liquid and the liquid containing the fibrous materials is boiled for a time. Using the conventional paper production method, the liquefied cellulose (cellulose fibres) can then be further processed and dried in the normal manner.

The present invention discloses luminous decorative paper, a decorative material, and a preparation method thereof. The paper comprises the following components by weight: 5-10 parts of a modified chloroether resin, 6-8 parts of modified cellulose nanocrystals, 3-5 parts of methacrylic acid, 6-10 parts of methyl methacrylate, 8-12 parts of styrene, 15-20 parts of butyl acrylate, 1-2 parts of ammonium persulfate, 0.2-0.5 parts of sodium bicarbonate, 8-11 parts of a composite phosphor, and 12-15 parts of a pigment. The invention adds the silica-modified chloroether resin and modified cellulose nanocrystals to ink to improve the ink's adhesion and durability, thereby increasing the gloss durability and service life of the luminous decorative paper.

The present invention relates to super-hydrophobic functional paper and food packaging technology field, and more particularly to a kind of preparation method and application of antibacterial adhesion super-double sparse antibacterial paper. The method includes: (1) nano-silicon dioxide particles are added in the mixed solution of absolute ethanol and ammonia, dispersed by ultrasonic dispersion instrument, and suspension is obtained; (2) the suspension obtained by step (1) is stirred at high speed, and 1H, 1H, 2H, 2H-perfluorodecyl triethoxysilane and tetraethyl silicate are added, and reacted at room temperature; (3) polyvinylidene fluoride is added to the suspension obtained by step (2) in proportion; (4) the suspension obtained by step (3) is added in spray gun spray pot, in 200KPa N2 atmosphere, sprayed on paper; (5) the paper obtained by step (4) is thoroughly dried, to obtain final product. The antibacterial adhesion super-double sparse antibacterial paper has excellent super-double sparse surface, compared with existing wrapping paper, has higher sterilization efficiency, acid and alkali corrosion resistance, is not easily contaminated and anti-ultraviolet radiation aging performance.

The invention belongs to the technical field of photocureable coatings, and particularly relates to bottoming-free paper UV gloss oil as well as a preparation method and application thereof. The preparation method comprises the following steps: heating and mixing polyurethane acrylate and epoxy acrylate to obtain a composite resin matrix; mixing the composite resin matrix with a bifunctional acrylate monomer, a trifunctional acrylate monomer, hyperbranched polyester acrylate, a composite photoinitiator, an organic silicon-fluorocarbon copolymer leveling agent and a nano-modified defoaming agent; and sequentially carrying out vacuum defoaming treatment and filtering purification on the obtained dispersion liquid to obtain the bottoming-free paper UV gloss oil. According to the invention, a high-adhesiveness composite resin system is constructed, and the multifunctional monomer and the auxiliary agent are cooperatively regulated and controlled, so that the high-efficiency curing and stable film forming of the UV gloss oil on a paper base material under the prime coat-free condition are realized.

The invention belongs to the field of application of lignin, and particularly relates to application of nano lignin dispersion liquid, base paper, coating liquid, anti-ultraviolet paper and a preparation method. The nano lignin dispersion liquid is applied to coating liquid and / or base paper. The nano lignin dispersion liquid is prepared by the following steps: dispersing alkali lignin or enzymatic hydrolysis lignin, and then adding a cationic polymer; and performing high-pressure homogenization. According to the technical scheme, lignin is adopted as a bio-based ultraviolet shielding material to replace a traditional chemical ultraviolet absorbent, and the environmental accumulation and phototoxicity risk can be effectively reduced. And the lignin is added, so that better protection and absorption effects can be achieved in an ultraviolet region, and human eye injury is reduced.

The present invention discloses a cellulose acetate membrane, a preparation method thereof, and an application thereof. The present invention relates to the field of fiber membrane technology. The present invention comprises the following steps: S1, debonding, breaking up, and vacuum drying a bleached bamboo pulp sheet, and adding it to an analytically pure acetic anhydride reagent to obtain fully swollen bamboo pulp fibers; S2, adding analytically pure trifluoroacetic acid to the acetic anhydride solution in step S1, subsequently adding acetic acid and stirring, heating the mixture in a water bath, adding deionized water to precipitate solids, filtering, and drying to obtain cellulose acetate; S3, mixing the resulting cellulose acetate with activated polyethylene glycol, subsequently adding sodium benzoate, stirring and mixing again until uniformly mixed, air-drying, dissolving in a chloroform solution to obtain an enhanced cellulose acetate solution, coating, and naturally drying to finally obtain a cellulose acetate membrane. The cellulose acetate membrane prepared by the present invention has good biocompatibility, green degradability, excellent mechanical tensile properties, high light transmittance, and ultraviolet light shielding properties.

The antibacterial fruit bag paper production device comprises a machine frame, a mesh belt paper feeding mechanism and a blanket type paper feeding mechanism which are installed on the machine frame, and further comprises a feeding mechanism and a pulp storage mechanism arranged at the discharging end of the feeding mechanism, and the discharging end of the pulp storage mechanism corresponds to the feeding end of the mesh belt paper feeding mechanism and the feeding end of the blanket type paper feeding mechanism; a drying mechanism is further installed on the rack, and a collecting mechanism is arranged at the bottom of the mesh belt paper feeding mechanism. The filtering disc and the feeding disc vibrate irregularly, a dynamic disturbance mechanism is introduced, under the condition that the solid content is extremely high, the fluidity of slurry can be maintained, the slurry is stored in the slurry storage box and then can flow out of the slurry outlet box to the mesh belt paper feeding mechanism and the blanket type paper feeding mechanism to be laid and conveyed, excessive water flow can be squeezed out in the conveying process to be collected in the collecting mechanism, and the conveying efficiency is improved. During pulp feeding, the pulp concentration is monitored in real time, the pulp throughput is dynamically controlled, it is ensured that the pulp entering the papermaking stage is always in the optimal concentration range, the paper uniformity is improved, and the antibacterial fruit bag paper yield is increased.

The present invention addresses the challenges of producing fiber-based materials, such as paper, paperboard, and corrugated cardboard. These materials are not known to have the ability to release (or distribute) flavors, nutrients, additives, and / or starch upon contact with water (e.g., hydrolysis). This problem is solved by a process (treatment) that breaks (decomposes) the hydrogen bonds between hydrogen and oxygen atoms in the cellulose fibers used in papermaking. This process involves dissolving cellulose (cellulose fibers) in a liquid (e.g., water) and boiling it above its boiling point. Next, a sweetener (e.g., cyclamate, saccharin, saumatin, fructose), citric acid as an oxidizing agent, and sorbic acid / potassium sorbate as a preservative are added. The desired release agent / function, such as flavors, nutrients, additives, and / or starch, is then added to the boiling liquid, and the liquid containing the fiber material is boiled for a period of time. Using conventional papermaking methods, the liquefied cellulose (cellulose fibers) is then further processed and dried in the usual manner.

Disclosed is a resin-impregnated fibrous material in the form of a sheet or a web, comprising an impregnating resin which comprises a) at least one resin component, which is selected from the group consisting of aminoplast resins and phenoplast resins and combinations thereof; and b) a concentrated aqueous polymer dispersion with an average particle size of less than 1000 nm comprising a polymer carrier prepared by heterophase radical polymerization of at least one ethylenically unsaturated monomer in the presence of components b1), b2) and b3); or an emulsion, comprising components b1), b2) and b3, an organic solvent and water; with b1) being at least one triazene-type light stabilizer of formula (I); b2) being at least one hindered amine-based light stabilizer; b3) being a non-ionic, cationic or anionic surfactant.

The invention relates to the field of papermaking, and particularly provides a high-temperature-resistant anti-aging method for producing a light-weight paper-based facing material, which comprises the following steps: S100, adding aramid fiber and mica powder into bleached softwood pulp, uniformly stirring, and carrying out on-net papermaking to obtain a paper base; s200, dipping the paper base in a reinforcing solution to obtain an intermediate paper base; and S300, the surface of the intermediate paper base is coated with the protective coating emulsion, and the light-weight paper-based facing material is obtained. Wherein the enhancing solution is a melamine-siloxane copolymer solution. The aramid fibers and the mica powder are added into the bleached softwood pulp, and the aramid fibers can provide thermal stability and high-strength rigidity, inhibit high-temperature shrinkage and thermal brittleness of the paper base, form a hydrogen bond network with the wood pulp fibers, and improve the crack resistance; the mica powder is good in thermal stability and insulativity and is used as an inorganic barrier, so that the heat resistance and the dimensional stability are improved; through composite reinforcement of the aramid fiber and the mica powder, a structural framework and an inorganic barrier are provided for the paper base.

The invention belongs to the technical field of environmental barrier coatings, and particularly relates to a preparation method of an anti-laser ablation coating based on C / C-SiC paper, the coating is prepared through single-layer or laminated pasting of prefabricated C / C-SiC paper, the C / C-SiC paper is composed of carbon fibers, a carbon matrix, SiC, a modifier and a binder, and the fibers in the paper are lapped and entangled to form two-dimensional net paper. The preparation method of the coating comprises the following steps: S1, manufacturing C / C-SiC paper; and S2, attaching the C / C-SiC paper to the surface of the base material, and performing hot-pressing curing to prepare the coating which is mechanically interlocked and combined with the surface of the base material. According to the method, the C / C-SiC paper is prefabricated, the anti-laser ablation coating is prepared through a paper pasting method, the anti-scouring capacity of the coating is effectively improved through lap joint and entanglement of fibers in the paper, the coating is prepared through the paster conveniently and rapidly, the paster can adapt to any shape through cutting, the preparation efficiency is high, the equipment requirement is low, and the paster can also be used for rapidly repairing the damaged coating; and the anti-laser real-time protection requirement can be met.

The invention belongs to the field of paper pulp products, and particularly relates to a paper pulp product surface wear-resistant reinforced coating material as well as a preparation method and application thereof, and the composition comprises the following components in parts by mass: 1-3 parts of micro-nano cellulose, 5-12 parts of modified starch, 0.1-2 parts of a viscosity modifier and 1-5 parts of an auxiliary agent. The method is suitable for the surface wear-resistant treatment process of the paper pulp product, the surface strength of the paper pulp product can be effectively improved, wear is reduced, the phenomena of powder falling and hair falling of the paper pulp product are reduced, cleanliness of a packaged object is guaranteed, friction damage to the surface of the packaged object is effectively avoided, and wear to the surface of the packaged object can be effectively avoided.

The invention belongs to the field of packaging box production, and discloses a production method of a degradable paper packaging box, which comprises the following steps: selecting wheat straw pulp and reed pulp as basic raw materials, and further comprises the following steps: S1, pretreating the raw materials; s2, a pulping process step; s3, a forming treatment step; s4, a composite drying step; s5, a secondary strengthening step; s6, a die cutting forming step; according to the production method of the degradable paper packaging box, by improving a raw material formula and a production process, the paper packaging box which has the excellent characteristics of high strength, high toughness and the like while the degradability is guaranteed is prepared, and the requirements of the market for environment-friendly and durable packaging products are met.

The application belongs to the technical field of aramid paper, and particularly relates to a meta-aramid paper with ultraviolet aging resistance, a preparation method and application. The preparation method of the meta-aramid paper with ultraviolet aging resistance comprises the following steps: first, defibrillation beating is performed by using a defibrator; then, a sheet former is used to form the pulp; and finally, hot pressing is performed by using a hot press. The nano metal oxide with ultraviolet resistance added in the defibrillation beating process can be uniformly dispersed in the meta-aramid paper, the ultraviolet resistance is fully exerted, and the meta-aramid paper is endowed with excellent ultraviolet aging resistance. Furthermore, by adjusting the nano metal oxide with ultraviolet resistance and performing ultrasonic treatment on the nano metal oxide with ultraviolet resistance in advance, the excellent ultraviolet aging resistance of the meta-aramid paper can be further improved, and the technical problem that the existing preparation method is difficult to prepare high-performance meta-aramid paper is solved.

The invention belongs to the field of lignin application, and particularly relates to anti-ultraviolet eye protection paper containing lignocellulose nanofibers and a preparation method of the anti-ultraviolet eye protection paper. The anti-ultraviolet eye protection paper comprises raw paper and coating liquid coated on the surface of the raw paper, the coating liquid comprises lignocellulose nanofibers and a functional additive. Lignin serves as a natural high-molecular polymer which is the second rich in reserves in the nature, phenylpropane in the lignin contains conjugated double bonds and phenolic hydroxyl groups and can absorb ultraviolet light and part of blue light, and lignin and cellulose are natural renewable materials and are non-toxic and biodegradable. Lignin replaces a traditional chemical ultraviolet absorbent, and the problem of environmental toxicity is solved. And the lignin is added, so that better protection and absorption effects can be achieved in an ultraviolet region, and human eye injury is reduced.

Disclosed in the present invention is a multi-color thermosensitive chromogenic material, comprising: a base material layer used for being coated with a thermosensitive coloring agent, wherein the base material layer is coated with a thermosensitive coloring layer after being subjected to a curing treatment; and the thermosensitive coloring layer, which comprises at least one thermosensitive coupler and a thermosensitive color-developing agent. The thermosensitive coupler comprises a low-temperature thermosensitive chromogenic coupler and / or a high-temperature thermosensitive chromogenic coupler. On the basis of the color matching principle, at least one thermosensitive coupler is used, and the color of the at least one thermosensitive coupler is displayed during thermosensitive printing; and thermosensitive couplers with different colors can also be used in combination, thereby producing chromogenic materials with different colors by using the limited thermosensitive couplers. At least one thermosensitive coupler is made into a polymer composite material or is wrapped inside a capsule made of a polymer material, such that heat is effectively isolated during thermosensitive printing, and color development requires higher temperatures. By means of the combined use of low-temperature and high-temperature thermosensitive chromogenic couplers, the chromogenic temperature of a printer is controlled during thermosensitive printing so as to produce two-color or multi-color prints.

The invention discloses a decorative plate with an antibacterial function and a preparation method thereof, and relates to the technical field of decorative plates. The preparation method of the decorative plate with the antibacterial function comprises the following steps: (1) dipping decorative paper in a melamine resin solution, and drying to obtain treated decorative paper; the melamine resin solution is prepared by mixing 10-12 parts by weight of melamine resin, 3-5 parts by weight of an antibacterial agent, 0.4-0.6 part by weight of a flame-retardant anti-aging agent, 0.1-0.3 part by weight of a dispersing agent and 0.5-0.8 part by weight of a toughening agent; and (2) spraying an adhesive on one side of the magnesium oxide board, then pasting the treated decorative paper, and performing hot pressing to obtain the decorative board with the antibacterial function. The prepared decorative plate has good anti-aging performance, flame retardant performance and antibacterial performance.