36results about How to "Strong physical and mechanical properties" patented technology

The invention discloses a zero-halogen flame-retardant thermoplastic polyurethane elastomer sheath material and a preparation method thereof. The zero-halogen flame-retardant thermoplastic polyurethane elastomer sheath material is prepared from the following raw material components in parts by weight: 50-80 parts of polyurethane, 10-30 parts of zero-halogen flame retardant, 10-20 parts of zero-halogen smoke suppressant, 5-20 parts of processing modifier, 0.2+/-0.05 part of processing auxiliary agent, 0.2+/-0.05 part of antioxidant and 0.2+/-0.05 part of ultraviolet resistant. Compared with the prior art, the zero-halogen flame-retardant thermoplastic polyurethane elastomer sheath material prepared by the invention has the advantages of wider processing temperature range, ultrahigh physical and mechanical properties and flame retardant property of UL-94 and V-0 level.

The invention discloses a degradable plant starch-sodium caseinate composite packaging film for fruits and vegetables and relates to the technical field of packaging films for the fruits and the vegetables. The packaging film is prepared from raw materials in parts by mass as follows: 80-90 parts of plant starch,40-50 parts of sodium caseinate, 15-20 parts of cloves, 15-20 parts of propolis, 15-18 parts of nano calcium carbonate, 12-15 parts of fumed silica, 10-12 parts of polyvinyl alcohol, 8-10 parts of sodium alginate, 8-10 parts of epoxidized soybean oil, 6-9 parts of zinc sulfide, 5-8 parts of konjac glucomannan, 5-8 parts of low-methoxyl pectin, 3-5 parts of sodium citrate, 3-6 parts of agar, 3-5 parts of genipin, 2-3 parts of polyglycerol fatty acid ester and 800-1000 parts of water. The plant starch and the sodium caseinate are used as main raw materials, and various aids are used as auxiliary materials, so that the produced packaging film has higher physical and mechanical properties, selective permeability and antibacterial and anti-oxidation effects; besides, the selected raw materials can be degraded easily, so that the ecological environment is protected.

The invention discloses a degradable cereal prolamin-chitosan composite packaging film for fruits and vegetables and relates to the technical field of packaging films for the fruits and the vegetables. The packaging film is prepared from raw materials in parts by mass as follows: 90-100 parts of cereal prolamin, 60-70 parts of carboxymethyl chitosan, 20-25 parts of cloves, 20-25 parts of propolis, 18-20 parts of sodium alginate, 15-20 parts of polyvinyl alcohol, 16-18 parts of nano calcium carbonate, 15-18 parts of epoxidized soybean oil, 12-15 parts of fumed silica, 10-12 parts of zinc sulfide, 10-12 parts of konjac glucomannan, 8-10 parts of low-methoxyl pectin, 8-10 parts of curdlan, 6-9 parts of soy isoflavone, 5-8 parts of genipin, 3-6 parts of polyglycerol fatty acid ester and 800-1000 parts of water. The cereal prolamin and the chitosan are used as main raw materials, and various aids are used as auxiliary materials, so that the produced packaging film has higher physical and mechanical properties, selective permeability and antibacterial and anti-oxidation effects; besides, the selected raw materials can be degraded easily, so that the ecological environment is protected.

The invention discloses an environment-friendly modified polyvinyl chloride tight buffering material for a soft communication optical cable and a preparation method of the material. The material comprises the following raw materials in parts by weight: 95-100 parts of polyvinyl chloride resin, 30-35 parts of an environment-friendly plasticizer, 5-8 parts of a cold-resistant plasticizer, 5-8 parts of an environment-friendly stabilizer, 20-35 parts of a filling agent, 3-8 parts of a flame retardant, 0.5-2 parts of a lubricant, 4-9 parts of an anti-impact modifier and 3-5 parts of an anti-heat shrinkage modifier. Due to the addition of the cold-resistant plasticizer, the material is outstanding in high temperature resistance, low temperature resistance and environmental protection property; due to the anti-heat shrinkage modifier, the material is relatively low in heat shrinkage rate; due to the flame retardant, the material is relatively good in flame retardant property. According to the preparation method, the process is simple, the temperature is reasonable, and the produced material is guaranteed to be relatively good in flame retardant property, high and low temperature resistance and small in heat shrinkage rate.

The invention relates to a novel powder coating and a preparation method of the novel powder coating, belonging to the architectural coating field. Fiber glass is added into the formula of common powder coating to improve physical and mechanical property o the coating. The preparation method is that the glass fiber is crushed in high speed, and then is mixed, extruded, crushed and milled with the other raw materials for making the powder coating, then the powder coating is prepared.

The invention discloses an edible plant starch-cellulose composite packaging film for meat products and relates to the technical field of edible packaging films. The packaging film is prepared from raw materials in parts by mass as follows: 80-100 parts of plant starch, 50-60 parts of hydroxypropyl methylcellulose, 30-35 parts of sodium carboxymethyl cellulose, 15-18 parts of sodium alginate, 12-15 parts of curdlan, 10-12 parts of low-methoxyl pectin, 8-10 parts of calcium citrate, 10-15 parts of cloves, 10-15 parts of cassia bark, 10-15 parts of spices, 5-8 parts of tea polyphenols, 10-12 parts of rapeseed oil, 8-10 parts of agar, 6-9 parts of genipin, 5-8 parts of polyglycerol fatty acid ester, 3-6 parts of edible wax and 800-1000 parts of water. The plant starch and the cellulose are used as main raw materials, and proper aids are used as auxiliary materials, so that the prepared packaging film for the meat products has higher physical and mechanical properties, the barrier property and antibacterial and anti-oxidation effects; besides, the packaging film can be eaten together with the products, so that the ecological environment is protected.

The invention discloses a multilayer composite adhesive tape preventing chemicals from penetrating and a preparation method thereof. The multilayer composite adhesive tape is prepared by coating aramid fiber base cloth with multiple rubber, concretely, one surface of the base cloth is coated with a fluorubber layer, and the other surface of the base cloth and the surface of the fluorubber layer are both coated with a chloroprene rubber layer. The preparation technology of the multilayer composite adhesive tape comprises preparing base cloth, coating one surface of the base cloth with the fluorubber layer, performing semi-sulfuration, coating the two surfaces of the coated base cloth with the chloroprene rubber layer, performing complete sulfuration, and obtaining the finished product adhesive tape. The multilayer composite adhesive tape employs aramid fiber fabric resistant to both acids and alkalis, possesses strong physical mechanical performances and is better than a nylon material. The multilayer composite adhesive tape has relatively strong acid and alkali resistance and chemical toxic agent resistance, and has the protection time up to 4 h. The multilayer composite adhesive tape has relatively good flame retardation performance, and can work at a high temperature. The multilayer composite adhesive tape employs chloroprene rubber and fluorubber as coating materials, is low in cost and superior in antitoxin performance.

The invention belongs to the technical field of preparation of polyethylene fibers and particularly relates to a high-temperature-resisting breathable graphene/ultra-high molecular weight polyethylenefiber and a preparation method. The preparation method comprises the following steps: preparing a graphene oxide solution, adding titanium dioxide rutile and adjusting a pH value; adding a reducing agent, carrying out hydrothermal reaction, cooling, filtering, washing, freezing and drying to obtain three-dimensional porous graphene/titanium dioxide; adding the three-dimensional porous graphene/titanium dioxide into polyethylene resin, adding white oil and a proper amount of functional additives, and swelling in a twin-screw extruder to form a spinning solution; extruding and carrying out water bath solidification to form gel silks; carrying out drying, multistage heat drawing, winding and the like through a guide roller to obtain the porous graphene/ultra-high molecular weight polyethylene fiber. Three-dimensional porous graphene/titanium dioxide powder is added when the spinning solution is prepared by adopting ultra-high molecular weight polyethylene, so that high temperature resistance and breathability of the fiber are improved. The graphene/ultra-high molecular weight polyethylene fiber prepared by adopting the method has excellent high temperature resistance, corrosion resistance and breathability.

The invention relates to a high-temperature underwater sound transmission rubber material and a preparation method thereof. The crystallization of chloroprene rubbers is restrained through selecting the chloroprene rubbers with slow crystallization speed and using butadiene rubbers (BR) with a certain ratio, so that the sound transmission performance and the temperature stability of the rubber material are improved; a certain parts of nanometer clay are added in a formula system to improve the water tightness of the sound transmission material; quick low-temperature and low-pressure vulcanization (100-120 DEG C, 30-40 minutes) of the rubber material is realized through optimizing the rubber material formula and the processing technique design. The underwater sound transmission rubber material with high sound transmission performance, high temperature stability, high water tightness and excellent physical and mechanical properties can be prepared through the method. The material can satisfy the requirements of a coating material of ship underwater sound equipment, and is an excellent underwater sound transmission material.

The invention discloses a degradable high-toughness packaging film and relates to the technical field packaging films. According to the degradable high-toughness packaging film disclosed by the invention, starch and wool are utilized as main raw materials, then lignocelluloses is added, and varieties of additives are utilized as auxiliary materials; thus, by means of the formula, contents of protein and amino acid are improved; the prepared packaging film has the advantages of high protein, high amino acid, high toughness and stronger physical mechanical property, permselectivity, bacterial resistance and oxidation resistance; furthermore, the chosen raw materials are green, safe and easy to degrade; thus, white pollution is avoided, and ecological environment is protected.

The invention relates to the technical field of production of mulching films, in particular to a high-photosynthetic-efficiency environment-friendly weather-proof silver-white-silver three-layer composite mulching film and a preparation method thereof. The high-photosynthetic-efficiency environment-friendly weather-proof silver-white-silver three-layer composite mulching film is formed by compounding a silver-gray outer film, a white middle film and a silver-gray inner film. The prepared composite mulching film comprises three kinds of linear low-density polyethylene with different properties,metallocene linear polyethylene, light stabilizing auxiliaries, B225-type composite antioxidants and ultraviolet light absorbers, and accordingly, the product has the advantages of high photosynthetic efficiency, high temperature, high soil moisture conservation performance, long service life and the like; after crop harvesting, old films still have high physical and mechanical properties, the tensile strength is slightly reduced, and the mulching films can be reused instead of replacement for each batch; the composite mulching film is quite easy to recycle and sort, and has high reutilization value; on the basis of ensuring heat insulation, soil moisture conservation, weeding and fertilizer efficiency conservation, effective reutilization of recycled resources is facilitated, and environmental pollution is reduced.

The invention provides a synthesis process for preparing polyvinyl chloride by the aid of suspension methods. The synthesis process includes particular steps of adding vinyl chloride liquid into composition systems with alkaline aqueous solution, initiators, macromolecular surfactants, relative molecular mass regulators and heat stabilizers; keeping the vinyl chloride liquid and the composition systems under the conditions of certain vacuum degrees; initiating polymerization reaction under illumination and pressurization conditions; carrying out vacuumizing again after the reaction is completely carried out; adding water into reaction products during post-treatment, stirring the water and the reaction products, carrying out centrifugal filtration and washing on the reaction products and drying the reaction products in a drum type drying oven to obtain polyvinyl chloride resin. Compared with the prior art, the synthesis process has the advantages that the synthesis process is reasonable in design, post-treatment is easy to implement, products are high in conversion rate, purity and physical and mechanical properties, quality defects such as fisheye can be prevented, and finished products are uniform in molecular weight distribution and good in heat stability; the products are good in appearance and optimal in physical and chemical properties, various physical and mechanical property indexes of the products are similar, and accordingly the synthesis process has a broad application prospect.

The invention discloses a waterproof shielding type control cable. The waterproof shielding type control cable comprises a conductor (1), an insulating layer (2) which covers the conductor (1), a waterproof layer (3) which covers the insulating layer (2), a shielding layer (4) which covers the waterproof layer (3), an isolating layer (5) which covers the shielding layer (4), and a protecting sleeve (6) which wraps the isolating layer (5); the waterproof layer (3) is manufactured from high water absorption and expansion type waterproof yarns; the shielding layer (4) comprises an inner shielding layer (41), and an outer shielding layer (42) which wraps the inner shielding layer (41); a filling layer (43) is arranged between the inner shielding layer (41) and the outer shielding layer (42). The waterproof shielding type control cable is environmentally friendly, high in electromagnetic interference resistance, outstanding in waterproof performance, and long in service life.