49results about How to "Good water and moisture resistance" patented technology

The invention provides an adhesive for grade-E0 medium density fiberboards. The raw materials of the adhesive include formaldehyde, polyvinyl alcohol, urea and tripolycyanamide. The production process of the adhesive comprises: firstly, adding all formaldehyde into a reaction kettle, regulating the pH value of formaldehyde solution to 7.5 to 8.5 by using sodium hydroxide solution, adding the 40 to 50 percent of polyvinyl alcohol and urea and adding 80 to 90 percent of tripolycyanamide and adding the 10 to 20 percent of urea; secondly, adjusting the pH value to 5 to 6 by using formic acid, reacting for 20 to 30 minutes till a cloud point, regulating the pH value to 705 to 8.5 with caustic soda solution, and adding the 10 to 20 percent of tripolycyanamide and 20 to 30 percent of urea; and finally, adding 10 to 20 percent of urea, regulating the pH value of the adhesive to 6.6 to 7.5, and discharging. The adhesive has the advantages that: the free formaldehyde content is very low, and the manufactured medium density board is of grade E0; the curing time is proper, the storage stability is high, and the normal-temperature storage period is about 1 month; and the manufactured medium density board has high internal combining strength and high waterproof and dampproof performance.

The invention provides a completely biodegradable film, which is mainly composed of poly(butylene adipate-co-terephthalate)/polylactic acid/starch, and comprises the following raw materials: 40-65 parts by weight of poly(butylene adipate-co-terephthalate) (PBAT), 5-35 parts by weight of polylactic acid, 10-30 parts by weight of modified starch, 0.1-1 part by weight of an opening agent, 0.5-2 partby weight of a lubricant, 3-13 parts by weight of a plasticizer, 0.1-0.5 part by weight of a chain extender, and 1-5 parts by weight of talcum powder. According to the invention, the poly(butylene adipate-co-terephthalate) resin is mixed with the modified starch, the polylactic acid and the rest auxiliary agents, and the specific ratio is combined; and therefore, the film prepared from the finallyprepared composition has the advantages of high tensile and tearing strength, good elasticity modulus, good elongation at break, good moisture resistance and water resistance, good barrier property,good degradability and the like. The blow-molded film has good mechanical properties, has the advantage of complete biodegradation, can be completely degraded into water and carbon dioxide in soil, isbeneficial to environmental protection, and has wide application value.

The invention discloses a surface sizing agent for papermaking, and a papermaking method for improving paper strength and water resistance. An active component of the surface sizing agent is prepared by a polymer polysaccharide compound and phyllosilicate in a weight ratio of 99.5-5:0.5-95. The papermaking method includes: preparing water-containing fiber papermaking pulp, an aqueous solution of the polymer polysaccharide compound, and a phyllosilicate-containing colloid solution or dispersion, mixing the phyllosilicate-containing colloid solution or dispersion and the aqueous solution of the polymer polysaccharide compound to obtain a surface sizing solution, feeding the water-containing fiber papermaking pulp onto a screen, filtering water to form paper sheets, allowing the paper sheets to pass through a dehydration process and a drying process to obtain base paper, coating the surfaces of the base paper with the surface sizing solution to obtain sized paper sheets, and drying. By using the surface sizing agent to papermaking, tensile strength and compression strength of the prepared paper are obviously enhanced, water-resistant and moisture resistant capabilities are largely improved, and the using amount of traditional chemical sizing agents is obviously reduced.

The invention relates to an antibacterial nipple and a preparation method thereof. The antibacterial nipple is prepared from the raw materials in parts by weight: 100 parts of vinyl raw rubber, 0.5-1.5 parts of potassium chloride, 5-15 parts of konjac glucomannan, 2-5 parts of chitosan, 5-10 parts of carrageenan, 2-4 parts of xanthan gum, 5-9 parts of Gellan gum, 0.5-1 part of starch sodium phosphate, 15-28 parts of gaseous white carbon black, 0.5-1.2 parts of hydrogen containing silicone oil, 2.5-6 parts of hydroxy silicone oil, 0.2-0.5 part of sodium stearate, 0.01-0.05 part of platinum catalyst and 300-450 parts of water, through the steps of cooling and kneading, carrying out high-temperature melted warming, vacuumizing, adding silicone oil, milling, carrying out injection molding, carrying out vulcanization and the like. The antibacterial nipple has the advantages of high transparency and antibacterial property, good biocompatibility, biodegradability, flexibility, retentiveness, tensile strength, pull strength and tear strength, good demolding property and relatively long storage period.

The invention discloses a preparation method of a moisture-proof and quick-drying surface sizing agent, which belongs to the technical field of papermaking auxiliary preparation. In the present invention, chitosan is firstly added to sodium hydroxide solution to soak and swell, then chloroacetic acid solution is added to stir and react, the product is collected and filtered by suction to obtain a filter cake, and the filter cake is washed to obtain carboxymethyl chitosan, and then stearic acid , silane coupling agent, etc., and anhydrous ethanol are stirred to obtain a mixed solution, which is heated and reacted with carboxymethyl chitosan and water, and the product is collected and then heated and reacted with polydimethylsiloxane, polyethylene glycol, etc. , and finally cool naturally to get the moisture-proof and quick-drying surface sizing agent. The moisture-proof and quick-drying surface sizing agent prepared by the present invention has the advantages of good sizing effect, good moisture-proof performance, and fast drying speed, and can effectively improve the sizing effect. The various strength properties of the final paper can be improved, and the moisture-proof and water-resistant capabilities of the paper can be improved, which has a good application prospect.

The invention relates to an environment-friendly flame-retardant non-adhesive fiberboard of crop straw and a preparation method thereof. The fiberboard is prepared by the following steps that 1 ) wheat straw and sorghum straw are taken to be cut off correspondingly, and the wheat straw and the sorghum straw are soaked in water to obtain a softened material; 2 ) steam explosion is correspondingly carried out on the softened material to obtain wheat straw fiber and sorghum straw fiber; 3 ) nano calcium carbonate, nano zinc oxide are mixed with nano copper oxide, and modifying is carried out toobtain a modified additive A; nano zinc borate, the nano zinc oxide are mixed with the nano copper oxide, and modifying is carried out to obtain a modified additive B; 4 ) the wheat straw fiber and the sorghum straw fiber are mixed with the modified additive A to obtain a core layer mixture; the wheat straw fiber is mixed with the modified additive B to obtain a surface layer mixture; and 5 ) thecore layer mixture is taken as a core layer, the surface layer mixture is taken as a surface layer to be laid and pre-pressed to obtain a slab, after hot-pressing forming and post-treatment are carried out, the environment-friendly flame-retardant non-adhesive fiberboard is obtained. The fiberboard has no formaldehyde release and has good mechanical property, good anti-water, moisture-proof, anti-corrosion and antibacterial properties; and good in fireproof and flame-retardant effects, and suitable for popularization and application.

The invention discloses a water-resistant power cable, which comprises a wire core, a plurality of wire core water-resisting layers, a packaging band and an outer sheath. The wire core is arranged outside a conductor and is provided with a water-resistant layer, an inner shielding layer, an insulating layer, an outer shielding layer and a copper shielding layer in sequence, wire core water-resistant layers are arranged outside a cable formed by a plurality of wire cores, gaps of the wire core water-resistant layers are filled with filler tapes, and the packaging band and the outer sheath are then arranged outside the wire core water-resistant layers in sequence. Since the cable core of the cable of the invention is filled with the water-resistant material, water or water vapor can not flow in the cable after entering the cable, thereby eliminating the influence generated after the water or water vapor enters the cable.

The invention discloses a manufacturing method of cyclic utilization type pressure-sensitive adhesive tape. A modified EVA aqueous solution of the adhesive tape is obtained through the following steps that 1, polyvinyl alcohol, sodium iso-octoate, a potassium sulfite salt and ferrous sulfate are dissolved in ionized water to form a water-based mixture; 2, the water-based mixture in the first step is put into a high pressure kettle, and ethylene is introduced to replace air in the high pressure kettle; 3, materials in the reaction kettle are heated to the reaction temperature of 80 DEG C and stirred, and monomer vinyl acetate, acrylic acid, dicumyl peroxide, tert-butyl hydroperoxide and sodium metabisulphite are injected in sequence; 4, cooling is conducted to below 40 DEG C to form the modified EVA aqueous solution. According to the manufacturing method of the cyclic utilization type pressure-sensitive adhesive tape, by means of an environment-friendly protective film, an EVA adhesive layer has viscidity and compression sensitivity at normal temperature, reutilization and recovery of the environment-friendly protective film are convenient, and adhesion of the modified EVA adhesive layer and polypropylene film is improved.

The invention discloses a protective film convenient for recycling, which comprises a polypropylene film, a pressure-sensitive modified EVA adhesive layer and a release material layer, and the pressure-sensitive modified EVA adhesive layer is located between the polypropylene film and the release material. Between the material layers; the pressure-sensitive modified EVA adhesive layer is composed of the following components: 100 parts of modified EVA aqueous solution, isooctyl acrylate, deionized water, tert-butyl peroxide 2-ethylhexyl carbonate , 4~6 parts of aziridine, polymethylphenylsiloxane, N-methylolacrylamide, triallyl isocyanurate, 1~2 parts of terpene resin, alkylphenol polyoxyethylene 0.5~2 parts of ether; 0.5~1 part of dimethyl sulfoxide. The protective film that is convenient for recycling realizes that the EVA adhesive layer has viscosity and pressure sensitivity at room temperature, and the pressure-sensitive modified EVA adhesive layer is an environmental protection water-based system, has no irritating smell, and is also convenient and easy to recycle. The protective film is reused and recycled, greatly reducing pollution.

The invention discloses a rainwater pipeline cable and relates to the technical field of an optical cable. A plurality of plastic loose tubes are stranded around a center reinforcement member; each plastic loose tube is internally equipped with optical fibers and filled with fiber paste; an aluminum plastic compound tape is wrapped outside the plastic loose tubes; a polyethylene protection jacket is wrapped outside the aluminum plastic compound tape; and a polyethylene sheath is wrapped outside the polyethylene protection jacket. The cable is combined with an ADSS aramid reinforcement member and a specially-produced ratproof and anti-termite outer sheath, so that tension resistance and biological damage preventing performance of the rainwater pipeline cable are enhanced; the good self-supporting tensile property of the rainwater pipeline cable allows the fibers not to be damaged in the traction and installation process, thereby ensuring integrity of communication performance; and corrosion resistance and ratproof and anti-termite functions of the cable allow the cable not to be torn or damaged by rats and termites under a dark underground pipeline, nor easy to be corroded by chemicals, thereby ensuring normal communication of the fibers and ensuring service life of the fiber cable.

The invention relates to moisture-curing polyurethane permeable paint for a calcium silicate board and application of the permeable paint. The moisture-curing polyurethane permeable paint for the calcium silicate board, provided by the invention, comprises the following raw material components in percentage by weight: 98%-99% of a polyisocyanate prepolymer of diisocyanate, 0.2%-0.8% of an initiator, 0.2%-0.8% of a catalyst and 0.2%-0.8% of a defoaming agent. The moisture-curable polyurethane permeable paint provided by the invention has a good sealing effect on a light calcium silicate board, can permeate into the board as a sealing primer, and forms a film at a certain depth under the board surface through moisture curing, so that the sealed calcium silicate board has very excellent water-resistant and moisture-proof capabilities, meanwhile, the mechanical property of the board can be improved to a certain extent, and the drawing strength of the board is improved; and the construction is simple and convenient, and cost is saved.

The invention discloses a metal chain armored fire-and-damp-proof power cable. The cable comprises a copper conductor, fire-resistant insulation layers, packing layers, a double-sided water-resisting layer, an inter-locked armoring layer, an outer sheath and a cable body; the cable body is prepared from the copper conductor, the fire-resistant insulation layers, the packing layers, the double-sided water-resisting layer, the inter-locked armoring layer and the outer sheath, the cross section of the cable body is shaped like a circle, the copper conductor is wrapped by one fire-resistant insulation layer, three fire-resistant insulation layers which are close to each other are wrapped by the double-sided water-resisting layer, gaps between the double-sided water-resisting layer and the fire-resistant insulation layer and the three fire-resistant insulation layers which are close to each other are filled with the packing layers, the double-sided water-resisting layer is wrapped by the inter-locked armoring layer, and the inter-locked armoring layer is wrapped by the outer sheath. The metal chain armored fire-and-damp-proof power cable has a good effect of shielding outside signals and can block interference of the external signals, and due to the fact that the double-sided water-resisting layer and the polyethylene outer sheath are arranged, the water resisting and damp proofing properties are good.

The invention discloses a moisture-proof floating cable, and belongs to the field of cables. The moisture-proof floating cable comprises a cable core, a moisture-proof protection layer and an outer sheath; the outer side of the cable core is sleeved with an isolation layer, the moisture-proof protection layer comprises an inner moisture-proof layer, a rotating sleeve and an outer moisture-proof layer, the inner moisture-proof layer is arranged on the outer side of the isolation layer in a winding mode, and the inner end side of the inner moisture-proof layer is fixedly connected to the isolation layer; the inner damp-proof layer is sleeved with the rotating sleeve, and the outer end side of the inner damp-proof layer is fixedly connected to the rotating sleeve. Raised lines are fixed on the outer surface of the rotating sleeve along the circumferential side at equal intervals; water swelling structures in one-to-one correspondence with the raised lines are fixed on the inner side surface of the outer damp-proof layer along the circumferential side of the outer damp-proof layer; the water swelling structure comprises a water swelling body, a blocking assembly and an elastic body, the inner side face of the water swelling body makes contact with the outer side face of the rotating sleeve, and one side face of the water swelling body makes contact with one corresponding protruding strip. The floating function of the floating cable can be effectively achieved, the damp-proof structure is ingenious in design, and the good damp-proof effect is achieved.

The invention discloses a corrugated carton with dampproof and dustproof performance. The corrugated carton comprises a corrugated board, wherein one surface of the corrugated board is coated with a glazing agent, and the glazing agent comprises, by weight, 50 parts of dispersed medium, 3-5 parts of hard wax, 2-4 parts of polydimethylsiloxane, 10-15 parts of methyl silicone oil, 3-6 parts of sodium hydroxide, 8-12 parts of acrylic resin, 5-10 parts of rosin and 3-6 parts of oleic acid. The corrugated carton has good waterproof and dampproof effects and dustproof and stain-proof performance.

A motor lead cable, several tinned annealed copper wires are stranded at a certain pitch to form a strand, several strands are re-twisted at a certain pitch to form a soft conductor, and several soft conductors are wrapped with a layer of superconductor at a certain overlapping rate. Thin isolation tape, ultra-thin isolation tape extruded with silicone rubber insulation, braided tinned annealed copper wire shielding layer over silicone rubber insulation, tinned annealed copper wire shielding layer extruded with a layer of flame-retardant silicone rubber sheath protective layer , flame retardant silicone rubber sheath protective layer braided high temperature resistant glass fiber reinforced layer, high temperature resistant glass fiber reinforced layer coated with low smoke halogen free flame retardant silicone rubber sheath protective layer.

The invention belongs to the technical field of frozen food processing, and particularly relates to a crisp cone, a frozen beverage and a preparation method. The crisp cone comprises the following raw material components in percentage by mass: 18-22% of wheat flour; 2-4% of butter; 1.3-2.4% of vegetable oil; 3.2-4% of a sweetener; 10-15% of egg liquid; 0.2-0.4% of an emulsifier; 0.02-0.06% of sodium bicarbonate; 0.032-0.08% of baking powder; 0.2-0.32% of edible salt; and 0.34-0.48% of thickening agent. Through matching of the components and adjustment of the use amount, especially the use amount ratio of the butter to the vegetable oil and matching of the butter, the vegetable oil and the thickening agent and the emulsifying agent, under the condition that the temperature of the frozen beverage fluctuates, the crisp cone is excellent in damp-proof and water-proof performance, uniform in color and better in taste than commercially available products.

A kind of environment-friendly car accessory foot pad device according to the present invention comprises a surface layer, a pearl cotton layer and a rubber layer which are sequentially bonded together from top to bottom. They are connected through air holes, and air-fresh fragrance beads are matched in the spaces. The surface layer of the environment-friendly car accessories floor mat device is provided with a pearl cotton layer with superior water-proof and moisture-proof effect, which prevents the downward penetration and retention of water stains sprinkled on the surface layer, and is conducive to its rapid evaporation, thereby preventing Or it slows down the occurrence of mildew and peculiar smell of the environmental protection car accessories foot pad device; in addition, there is a space in the rubber layer, and the air fresh fragrance beads are built in the space, and the space is connected with the outside of the rubber layer through the air hole. When a driver or a passenger steps on the foot pad device of this kind of environmental protection car accessories, under the action of pressure, the rubber layer is deformed, the space is squeezed, and the air containing the aroma of fresh air beads in the space is squeezed and discharged into the air in the car. Thereby play a role in improving the air quality in the car.

The invention relates to dry/wet wipable whiteboard pen ink and a preparation method thereof, and belongs to the technical field of fine chemical engineering. The preparation method is characterized by comprising the following steps: fully infiltrating carbon black by using high-pressure liquefied ozone and carrying out surface oxidation modification on the carbon black by utilizing the strong oxidizing action of ozone; introducing hydrophilic oxygen-containing groups such as carboxyl and hydroxyl to the surface of the carbon black, thereby improving the wettability of the carbon black and improving the dispersion stability of the carbon black in an aqueous solution; opening a high-pressure reactor valve to generate instantaneous gasification expansion and high pressure; enabling the pressure generated by ozone expansion to act on a part between carbon black layers to produce cracks; expanding original cracks and breaking into fine fragments; meanwhile, expanding interlamellar spacingfor enabling additives and water molecules to be easily infiltrated into an interlayer, and further improving the dispersion performance in the water and the wiping effect. The dry/wet wipable whiteboard pen ink disclosed by the preparation method disclosed by the invention has the advantages of stable properties of writing fluid, fluent writing, convenience in dry wiping, better wet wiping effect, no peculiar odor and suitability for writing of commercially-available whiteboards.