46results about How to "Strong elongation at break" patented technology

The invention discloses a layered broadband radar absorbing plate. The absorbing plate is a multilayer absorbing film. The multilayer absorbing film has five layers which are a first layer of a spherical carbonyl iron film, second and third layers of flaky carbonyl iron films, fourth and fifth layers of sheet Fe-Si-Al films from top to bottom in sequence. The invention also discloses a manufacturing method of the above-mentioned absorbing plate. The layered broadband radar absorbing plate of the present invention utilizes the principle of electromagnetic matching, the stress orientation technology, and the production technology of coating, rolling and vulcanization comprehensively. The finished product is characterized by high microwave absorption rate, a wide absorption frequency band, athin thickness, small surface density, high elongation at break, strong adhesion, high and low temperature resistance, flame retardance, easy usage, etc., and has wide application prospects in microwave stealth transformation of radar, communications equipment, satellite navigation, electrical equipment, notebooks, base stations, medical equipment and other electronic industries and weapons and equipment, and especially the stealth transformation of aerospace vehicles.

The invention discloses a reinforced absorbable ligature clip and a preparation method thereof. The material used in the ligature clip is composed of basic materials and short nanofibers. The short nanofibers maintain a crystalline form and are uniformly dispersed in the basic material. The short nanofibers are compounded The mass percentage in the material is 5% to 50%; the enhanced absorbable ligation clip of the present invention has good biocompatibility and biodegradability, and will not cause tissue adhesion, infarction, sepsis and other phenomena after use. Among them, due to the rapid hydrolysis of short-fiber polyester materials such as polyglycolide or polylactide, generally after 30 days, a regional acidic environment will be formed inside the ligation clip, which will accelerate the degradation of the base material and reduce the absorption of the base material. The time is greatly shortened from the original 180 days to 90 days, and there is no foreign body adverse reaction, which can meet the clinical requirements of medical materials.

The invention discloses a cold stamping formed composite hard sheet for packaging medicines. The hard sheet comprises a polyamide layer, a maleic anhydride modified polyethylene layer, an acrylic acid modified polyethylene layer, an aluminum foil layer, a dry-laminate glue layer and a polyvinyl chloride layer which are arranged in turn. By the maleic anhydride modified polyethylene layer and the acrylic acid modified polyethylene layer which are extruded in a co-extrusion mode, the aluminum foil layer and the polyamide layer to which the maleic anhydride modified polyethylene layer and the acrylic acid modified polyethylene layer are attached have higher peel strength, the whole extrusion layer is flexible and high in toughness and has high tensile strength and elongation at rupture, and a product can be effectively prevented from having problems of aluminum rupture, layer separation and the like in the cold stamping process.

The invention relates to a preparation method of gum for a wall. The preparation method comprises the steps that an ink-receptive coating is coated on a printing paper layer; an acrylate pressure-sensitive adhesive layer is coated on a release layer; drying is performed; and the gum for the wall is obtained by compounding through a dry-type compounding technology. The preparation method is characterized in that an acrylate pressure-sensitive adhesive used by the acrylate pressure-sensitive adhesive layer is an acrylate pressure-sensitive adhesive for the wall, and is mainly made by copolymerization of a soft monomer, a hard monomer and a functional monomer, and the functional monomer at least comprises pyridine-2-acrylic acid. Pyridine-2-acrylic acid can form coordination with a Fe element in the wall to improve the adhesive force with the wall, so that the acrylate pressure-sensitive adhesive for the wall has the advantages of high adhesive strength, adsorption force, peeling strength and elongation at break, and good weather ability, and the gum for the wall obtained by taking the acrylate pressure-sensitive adhesive as the raw material can be applied to adhesion with the wall well.

The invention discloses a layered broadband radar absorbing plate. The absorbing plate is a multilayer absorbing film. The multilayer absorbing film has five layers which are a first layer of a spherical carbonyl iron film, second and third layers of flaky carbonyl iron films, fourth and fifth layers of sheet Fe-Si-Al films from top to bottom in sequence. The invention also discloses a manufacturing method of the above-mentioned absorbing plate. The layered broadband radar absorbing plate of the present invention utilizes the principle of electromagnetic matching, the stress orientation technology, and the production technology of coating, rolling and vulcanization comprehensively. The finished product is characterized by high microwave absorption rate, a wide absorption frequency band, athin thickness, small surface density, high elongation at break, strong adhesion, high and low temperature resistance, flame retardance, easy usage, etc., and has wide application prospects in microwave stealth transformation of radar, communications equipment, satellite navigation, electrical equipment, notebooks, base stations, medical equipment and other electronic industries and weapons and equipment, and especially the stealth transformation of aerospace vehicles.

The invention discloses an enhanced type adsorbable ligation clip and a preparation method thereof. The ligation clip is prepared from a base material and nano staple fibers, the nano staple fibers are uniformly dispersed in the base material in a manner of keeping a crystalline form, and the mass percent of the nano staple fibers in a composite material is 5% to 50%. The enhanced type adsorbableligation clip disclosed by the invention has good biocompatibility and biodegradability; after the ligation clip is used, phenomena such as tissue adhesion, infarction and sepsis cannot be caused; during degradation, polyester materials of the nano staple fibers such as polyglycollide or polylactide are relatively high in hydrolysis speed, and a regional acidic environment can be generally formedinside the ligation clip in 30 days, so that the degradation of the base material is accelerated, and the absorption time of the base material is greatly shortened to 90 days from original 180 days; the generation of foreign-matter adverse reaction is absent, so that the clinical requirements of medical materials can be met.

The invention discloses a method for producing a plastic tray by utilizing a hollow blow molding machine. The method comprises the steps of sealing an original air outlet of a blowing hole in the bottom of a traditional front die of the plastic tray, and arranging five blowing needles on the forming surface of the front die by utilizing a ventilation channel of the original bottom blowing hole; clamping the bottom of a tubular hollow blank when the blank is discharged, beginning to assemble, preblowing air to the hollow position of the tubular hollow blank through a blowing port in an extruding machine at the same time, stopping preblowing air when the tubular hollow blank is expanded to the set size, and continuing assembling; at the time, the five blowing needles are slowly close to the hollow blank, firstly, the hollow blank is punctured by the longest central blowing needle so as to blow air, and secondly, the hollow blank is punctured by the corner blowing needles with the same length at four corners so as to blow air, so that simultaneous blowing from five side surfaces is realized, and the tray blank is uniformly and closely adhered to the surface of a die cavity instantly. Finally, the method for producing the plastic tray, which has the advantages of uniformity in wall thickness, high intensity, low raw material consumption, low cost, stable quality and high efficiency, is provided.

The invention relates to a cement-base waterproof coating for water proofing, seepage proofing and liquid proofing of roads and bridges and preparation method thereof. The invention is characterized in that the water-emulsion organic silicon composited acrylic acid modified asphalt cement-base waterproof coating is composed of component A and component B in weight ratio of 1:0.5-1.5; wherein the component A contains the following raw materials by weight percent: 30-70% of acrylic emulsion or styrene-acrylic emulsion, 1-30% of organic silicon resin, 10-50% of emulsified asphalt, 1-20% of filler, 0.1-3% of auxiliary agent and 1-10% of water; and the component B contains the following raw materials by weight percent: 70-100% of cement and 0-30% of filler. The invention has the characteristics of strong adhesive force with foundation, high tensile strength, high elongation at break, strong adaptability, favourable shearing performance, low cost and being environmentally friendly.

The invention relates to a high-flexibility geomembrane and a preparation method for the same. The high-flexibility geomembrane comprises the following raw materials in percentage by weight: 20-60% of HDPE (high density polyethylene), 10-55% of LLDPE (linear low density polyethylene), 20-65% of elastomer, and 5-10% of carbon black master batch, wherein the total percentage of the raw materials is 100. The preparation method comprises the following steps of: weighing and uniformly mixing the raw materials aforementioned according to a formula; pouring the raw materials in an extruder, and melting and uniformly mixing in the extruder; conveying the raw materials in a three-layer co-extrusion extruder, and extruding from a circular die orifice; blowing up via air, and cooling to form a tubular membrane; and splitting, flattening and rolling to obtain the product. The high-flexibility geomembrane disclosed by the invention is greatly improved in elongation at break, puncture resistance, cold brittleness resistance and bending resistance; and the geomembrane is improved in safety during a use process.

The invention provides a light-cured polyurethane coating and a preparation method and application thereof. The coating is composed of the following raw material components: component A includes by weight: 60-80 parts of polyurethane acrylate, 10-20 parts of reactive monomer diluent, 1-20 parts of amino resin, and 0.05-10 parts of pigment and 10-30 parts of filler; B component includes by weight: 40-100 parts of isocyanate and 40-100 parts of polyol; C component is a photoinitiator. The light-curable polyurethane coating of the invention can form a dense and non-porous elastic coating film with high mechanical strength, heat and cold resistance, corrosion resistance and aging resistance after being cured.

The invention discloses an automobile steering gear bellows dust shield material, raw materials of which comprise (by weight): 20-50 parts of high density polyethylene, 1-5 parts of dimethylamino propylanmine, 5-15 parts of modified natural wood fiber, 2-4 parts of kapok fiber, 1-5 parts of nano-silica, 15-25 parts of clay, 1-4 parts of diisononyl phthalate, 1-2 parts of phosphate, 1-2 parts of color master batch, 1-3 parts of a lubricant, 0.5-1.5 parts of an antioxidant and 1-2 parts of an antistatic agent. The automobile steering gear bellows dust shield material has excellent tensile strength, high elongation at break and excellent insulating property and aging resistance.

The invention relates to a polypropylene film reinforced by modified nano barium sulfate and a preparation method of the polypropylene film and belongs to the technical field of functional packaging materials. The polypropylene film is prepared by using the modified nano barium sulfate as the toughening agent and organic montmorillonite and maleic anhydride grafted polyethylene as the compatibilizer, adding certain reinforcing agent and using PP as base material through blowing. The reinforced composite polypropylene film prepared by the method is good in heat resistance, high in barrier property, high in tensile property, high in breaking elongation rate and good in anti-aging performance, has certain flame retardance, and is widely applicable to fields such as daily necessities and household appliances.

The invention relates to a cold-stamping composite hard tablet for solid medicine and belongs to the technical field of pharmaceutical packaging materials. The cold-stamping composite hard tablet for solid medicine of the invention comprises a polyamide layer, an aluminum foil layer and a polyvinyl chloride layer which are sequentially arranged, wherein a glue layer is arranged between the aluminum foil layer and the polyvinyl chloride layer. According to the invention, each surface of the aluminum foil layer comprises an aluminum phosphate film and a rough layer, the surface of the aluminum foil layer is coated with a polyurethane resin layer and the polyurethane resin layer is located between the aluminum foil layer and the polyamide layer; a maleic anhydride modified polyethylene layer and an acrylic acid modified polyethylene layer are orderly arranged between the polyamide layer and the aluminum foil layer; and adhesive layers are both arranged between the acrylic acid modified polyethylene layer and the polyurethane resin layer and between the aluminum foil layer and the polyurethane resin layer. According to the invention, the glue density of the glue layer is 4.9-5.1g / cm<3>, the thickness of the polyamide layer is 28-32 mu m, the thickness of the aluminum foil layer is 48-53 mu m, the thickness of the polyurethane resin layer is 52-58 mu m and the total thickness of the composite hard tablet is 140-143 mu m. The composite hard tablet of the invention has long service life and small vapor and oxygen transmittance.

The invention discloses a method for producing a plastic tray by utilizing a hollow blow molding machine. The method comprises the steps of sealing an original air outlet of a blowing hole in the bottom of a traditional front die of the plastic tray, and arranging five blowing needles on the forming surface of the front die by utilizing a ventilation channel of the original bottom blowing hole; clamping the bottom of a tubular hollow blank when the blank is discharged, beginning to assemble, preblowing air to the hollow position of the tubular hollow blank through a blowing port in an extruding machine at the same time, stopping preblowing air when the tubular hollow blank is expanded to the set size, and continuing assembling; at the time, the five blowing needles are slowly close to the hollow blank, firstly, the hollow blank is punctured by the longest central blowing needle so as to blow air, and secondly, the hollow blank is punctured by the corner blowing needles with the same length at four corners so as to blow air, so that simultaneous blowing from five side surfaces is realized, and the tray blank is uniformly and closely adhered to the surface of a die cavity instantly. Finally, the method for producing the plastic tray, which has the advantages of uniformity in wall thickness, high intensity, low raw material consumption, low cost, stable quality and high efficiency, is provided.

The invention belongs to the technical field of polymer polyester materials, and in particular relates to a high-toughness polyester resin and a synthesis method thereof. In terms of mass percentage, the raw material composition consists of 20%-40% of glycol, 30%-50% of dibasic acid and / or acid anhydride, 20%-40% of dilute solvent and 0.01%-0.1% of auxiliary agent. The high-toughness polyester resin described in the present invention has low viscosity and high reactivity, strong bonding performance, high heat distortion temperature and elongation at break, and high strength of the resin cast body; it is used for making artificial marble chips Material bonding and artificial quartz stone plates, etc., have good wettability with fillers, good toughness, and excellent mechanical strength.

The invention specifically relates to a finishing agent for improving the resistance of leather to a low-temperature dry environment, belonging to the technical field of leather finishing. The finishing agent comprises the following raw materials: acrylic resin, hydroxyethylmethyl cellulose, thionyl chloride, an organometallic compound, a fatty amine curing agent, nano-silica, glycidyl methacrylate, isophorone diisocyanate and methyl acrylate. Compared with the prior art, the finishing g agent has the advantages that the finishing agent can effectively prevent cracks under cold and dry conditions; and after a dermal surface is uniformly coated by a film formed by the finishing agent, surface performance of a dermal material is improved while good air permeability of the dermal material is guaranteed.

The invention discloses a cable material, which is formed by using modified polyethylene and EPDM rubber as base materials, and adding flame retardants, stabilizers, anti-aging agents and other additives at the same time; wherein the modified polyethylene is made of polystyrene Ethylene is used as a raw material, tert-butyl peroxymaleate is used as an initiator, sodium dodecylbenzenesulfonate is used as a catalyst, and a modifying agent is added; the modifying agent is selected from vinyltrimethoxysilane, Mixture of 2,3‑bis(2,4,5‑trimethyl‑3‑thiophene) maleic anhydride and (3,3,3‑trifluoropropyl) trimethoxysilane; flame retardant selected 6‑ (Difluoromethoxy)‑2‑(trimethylsilyl)benzo[4,5]imidazo[2,1‑b]thiazole, 10‑(2,5‑dihydroxyphenyl)‑10 A mixture of -hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide and triphenyl antimony oxide; finally the cable material prepared by the present invention not only has larger tensile strength and elongation at break, And it has high flame retardancy, even after heat aging and sunlight aging treatment, it still has strong tensile strength and elongation at break.