130results about How to "Mechanical properties are not affected" patented technology

The invention discloses a riveting method of ultrahigh strength steel plates or aluminum alloy plates and aims to solve the problems that ultrahigh strength steel plates cannot be riveted and joints are difficult to effectively weld since rigid and crispy metallic compounds occur to welding spots when the ultrahigh strength steel plates and the aluminum alloy plates are under spot welding. The riveting method includes the steps of 1, performing liquid nitrogen cooling on rivets in a cooling chamber before riveting so as to cool the rivets to below 0 DEG C; 2, placing an upper plate and a lower plate on a first compound female die, and holding down the upper and lower plates with a first compound binder ring; 3, heating riveting areas of the upper plate with a first fiber-optic heater to a threshold; 4, heating riveting areas of the lower plate with a second fiber-optic heater to a threshold; 5, feeding the low-temperature rivets to a central light through hole of the first compound binder ring, and pressing the rivets for riveting with a first compound punch; 6, co-pressing the rivets with the first compound punch and the first compound female die to turn out ring feet of the rivets to obtain rivet fasteners; 7, releasing the first compound punch to allow it to move up and return.

A process for preparing the dull and smooth aluminum-plastic band includes such steps as choosing an aluminum foil as basic band, pre-treating, extruding out at least one plastic film layer onto one or two surfaces of basic band, rolling while heating, and heat-treating by controlling the temp between Vicat softening point and fusion point for obtain dull and smooth surface. It can be used for optical cable or electric cable for high moisture tight effect.

The invention relates to an antibacterial polyvinyl chloride material. The antibacterial polyvinyl chloride material comprises polyvinyl chloride resin, wherein the material comprises the following compounds in every 100 parts of polyvinyl chloride resin as basic resin by weight: (A) 2-10 parts of a combined antibacterial agent by weight, the combined antibacterial agent comprising at least one of an antibacterial agent A selected from titanium dioxide and silver-supported nano titanium dioxide and an antibacterial agent B selected from a polyquaternium antibacterial, wherein the weight ratio of the antibacterial agent A to the antibacterial agent B is 1: 3 to 4: 3; (B) a plasticizer; and (C) an optional stabilizer. The antibacterial polyvinyl chloride material comprises the specific combined antibacterial agent, so that the polyvinyl chloride material has strengthened antibacterial ability and has a good mechanical property. The invention also relates to preparation and application of the polyvinyl chloride material, and the material can serve as a medical polymer material, particularly a medical catheter material, particularly a tracheal catheter material.

The invention discloses a preparation method for fluorine silicon phosphorus-containing anti-dropping flame-retardant polyethylene terephthalate. The preparation method is characterized by comprising the following steps of: performing prepolymerization on a phosphorus-containing copolymerization flame retardant to synthesize phosphorus-containing copolymerization flame retardant prepolymer; performing dehydration reaction on trifluoalkyl siloxane and octaalkylcyclotetrasiloxane; adding dihydroxy siloxane and a catalyst, and reacting to synthesize dihydroxy fluorosiloxane; performing esterification on terephthalic acid and glycol; adding a catalyst B and a stabilizing agent; adding the phosphorus-containing copolymerization flame retardant prepolymer and the dihydroxy fluorosiloxane for polycondensation; and after the reaction is finished, cooling by using water and granulating to prepare the fluorine silicon phosphorus-containing anti-dropping flame-retardant polyethylene terephthalate. The product prepared by the method has high flame-retardant and anti-dropping properties and can serve as a raw material for producing films with the flame-retardant property of 94ULV-0 level or VTM-0 level, flame-retardant fibers and textiles with the flame-retardant level I and higher level, and V0-level flame-retardant plastic products.

The invention provides a water-boiling-resistant and flame-retardant polypropylene composite material with a high glow-wire ignition temperature and a preparation method. The water-boiling-resistant and flame-retardant polypropylene composite material with the high glow-wire ignition temperature is composed of the following materials: 72-76 parts of PP resin, 24-28 parts of a nitrogen phosphorus intumescent-type flame retardant, 0.1-0.2 part of an anti-dripping agent, 0.2-0.3 part of an antioxidant, 0.4-0.6 part of a lubricant, and 0.1-0.2 part of a high-efficiency synergist. The flame-retardant polypropylene composite material prepared by the method guarantees the material to pass a UL94 1.6mm-V0 test and achieve high-efficiency flame retardance, and at the same time the flame-retardant polypropylene composite material has performance such as a high glow-wire ignition temperature (875 DEG C, GWIT), water boiling resistance (100 DEG C), precipitation resistance, low smoke and thermal oxygen ageing and discoloring resistance (150 DEG C).

The invention discloses a quaternary phosphonium salt pillared layered zirconium phosphate material, and a preparation method and an application thereof. The chemical formula of the quaternary phosphonium salt pillared layered zirconium phosphate material is as follows, R is methyl, butyl, phenyl or alkane with the length of a carbon chain of 8-20; X is Cl or Br; and m is 1, and n is 0.00288-0.174462. The preparation method comprises the steps of utilizing methylamine to prop up an interlayer spacing interval of zirconium phosphate, obtaining a methylamine-zirconium phosphate precursor, then adding a quaternary phosphonium salt into the methylamine-zirconium phosphate precursor for continuously carrying out reaction for a certain time, replacing the methylamine in the precursor and obtaining the quaternary phosphonium salt pillared layered zirconium phosphate material with white or light gray external appearance, and the quaternary phosphonium salt pillared layered zirconium phosphate material can be added into plastics, rubber, fibers, coatings, adhesives, paper and other materials for preparing an antibacterial or flame-retardant functional material, and be also used for removing algae in water and governing large-area red tide and water blooms in fresh water.

The invention discloses a halogen-free flame-retardant polypropylene material and a preparation method thereof. The halogen-free flame-retardant polypropylene material comprises components in parts by weight as follows: 100 parts of polypropylene resin, 20-35 parts of a halogen-free composite flame retardant, 5-20 parts of a toughening agent and 0.05-0.12 parts of a complex antioxidant, wherein the halogen-free composite flame retardant comprises diphosphonate piperazine, pentaerythritol diphosphate melamine salt, melamine urate and organic montmorillonite in the weight ratio being (5-20) : (5-20) : (1-5) : (1:5). According to the halogen-free flame-retardant polypropylene material, a halogen-free composite flame retardant system comprises diphosphonate piperazine, pentaerythritol diphosphate melamine salt, melamine urate and organic montmorillonite and has an excellent flame-retardant synergistic effect and excellent high-temperature resistance, particularly, hydrolysis-resistant performance can be acquired without any treatment, and the flame retardant system is not easily hydrolyzed in the forming process.

The invention relates to a building finishing decoration material, relates to an artificial quartz stone plate, and especially relates to a super-strength and anti-wear artificial quartz stone plate and a production method thereof. The artificial quartz stone plate is produced from, by mass, unsaturated polyester resin, short-cut basalt fibers, silicon nitride whiskers, calcium sulfate whiskers, an inorganic silicon material, a pigment, a coupling agent, a medium temperature curing agent and a promoter, and the artificial quartz stone plate is obtained from above components through the method. The artificial quartz stone plate has the advantages of high hardness, good wear resistance, greatly improved flexural strength, greatly improved compression and shock resistance, excellent high-temperature and low-temperature resistance, no cracking in sudden cooling or heating environment, and widened application field.

The invention relates to a method for producing quick crystalline polylactide compound material by nano nucleating agent in situ belonging to the compound material field. The inventive method has the lactide or lactide as material, mixes the nano nucleating agent for a hot melting polycondensation to get polylactide/nano nucleating agent compound material. The crystal speed of the compound material is increased relative to the pure polylactide material. The method has a simple craft, a low cost, and gets the compound material with a good processing performance, mechanical property and a completely biodegradation which is applied in many fields.

Belonging to the field of organic-inorganic hybrid materials, the invention provides a quaternary ammonium cation and quaternary phosphonium cation-containing organic cation modified clay, its preparation method and application. The preparation method comprises: reacting a suspending solution of a sodium base treated clay mineral with quaternary ammonium cations and quaternary phosphonium cations, conducting filtering, washing, drying and crushing, thus obtaining the quaternary ammonium cation and quaternary phosphonium cation-containing organic cation modified clay with a synergistic effect. The organic cation modified clay provided in the invention has good stability, excellent weather resistance, and no toxicity. The organic cation modified clay contains quaternary ammonium cation modified clay and quaternary phosphonium cation modified clay simultaneously, and shows a synergistic antibacterial activity, so that it can be applied to plastics, rubber, fibers, coatings, adhesives, paper, wood-plastic composite materials and a variety of polymer materials to improve the antibacterial property, the flame retardance and the barrier property of polymers, and has no influence on the mechanical properties of the polymers.

The invention relates to an alkali-activated cementing material and a preparation method thereof. Raw materials comprise a powder raw material, an activator and a nano component, wherein the activatoris a water glass solution and/or a sodium hydroxide solution, and the mass ratio of water in the activator to the powder raw material is a preset water-cement ratio. The preparation method of the alkali-activated cementing material comprises the following steps of: (1) mixing the nano component with the activator, adding water until the preset water-cement ratio is achieved so as to obtain an activator mixed solution, and placing the activator mixed solution for aging; (2) optimizing the content of the activator in the activator mixed solution so as to obtain an optimized activator mixed solution; and (3) mixing the powder raw material with the optimized activator mixed solution, performing stirring, and carrying out curing to obtain the alkali-activated cementing material. The amount ofalkali release of the alkali-activated cementing material can be reduced to 3% or below, and a scumming phenomenon of the alkali-activated cementing material can be eliminated completely.

The invention discloses a bamboo charcoal Lyocell fiber and provides a preparation method thereof. The preparation method comprises the following steps: performing surface modification treatment on bamboo charcoal, then mixing the bamboo charcoal with a concentrated NMMO (N-Methylmorpholine-N-oxide) water solution, mixing the mixture with activated cellulose pulp for dissolving, vacuumizing, performing heat preservation, extracting redundant water continuously to obtain a spinning raw solution, and finally, spinning to prepare the bamboo charcoal Lyocell fiber with bamboo charcoal content of 3wt%-20wt%. Through the preparation method, no extra reagent is introduced, so that the recycling of the solvent is facilitated, and the mechanical property of the fiber is not reduced; meanwhile, the prepared bamboo charcoal Lyocell fiber is excellent in performance of bacteria removal, bacteriostasis, moisture absorption and moisture removal.

The invention discloses a manufacturing method of composite board seal head made from high-strength austenite nickel-iron-chromium alloy and austenite stainless steel. The manufacturing method comprises the following steps of: medium-temperature heat forming; after heat forming, carrying out a solution treatment process; and carrying out a pressing process, wherein the pressing process satisfies technological conditions as follows: a empty furnace is heated to 1000+/-75 DEG C, a seal head circular plate is placed in the furnace at a temperature greater than or equal to 800 DEG C, and is then heated to 1100+/-15 DEG C along with the furnace; the seal head circular plate is maintained at the temperature for 2-4h, and is then discharged from the furnace to be pressed for more than 2 times while the seal head circular plate is hot; the temperature of the seal head is measured at any time during the pressing process; and when the temperature of the seal head is lower than 850 DEG C, the seal head circular plate is put back into the furnace against to be heated, and the final pressing temperature of the seal head circular plate is no less than 850 DEG C. The manufacturing method disclosed by the invention employs processes of radial finishing polishing treatment before the composite board seal head is pressed, middle-temperature heat forming, and solution treatment after heat forming.

The invention discloses a preparation method for an ammonium polyphosphate/kaolin composite flame retardant. The preparation method specifically comprises the following process steps: (1) calcining superfine water-washed kaolin for 1 to 2 hours at 600 to 900 DEG C to obtain calcined kaolin; (2) performing surface modification on ammonium polyphosphate by using cyanurtriamide to obtained modified ammonium polyphosphate, wherein the modifying temperature is 100 to 250 DEG C, the modifying time is 1 to 2 hours, and the using amount of the cyanurtriamide is 5 to 25 percent of the mass of the ammonium polyphosphate; (3) mixing the calcined kaolin and the modified ammonium polyphosphate in a mass ratio of 1:2-6, and performing compounded surface modification by using a modifier to obtain the ammonium polyphosphate/kaolin composite flame retardant, wherein the modifying temperature is 60 to 120 DEG C, the modifying time is 15 to 60 minutes, and the using amount of the modifier is 0.5 to 3 percent of the total mass of the calcined kaolin and the modified ammonium polyphosphate. According to the preparation method for the ammonium polyphosphate/kaolin composite flame retardant, the water solubility and the hygroscopicity of the ammonium polyphosphate can be reduced obviously; the dialysis resistance of an ammonium polyphosphate filled polymer product can be improved.

The invention relates to an amide-type aid and a preparation method thereof, which belong to the field of the manufacture of a compound solid propellant. The amide-type aid is produced through the reaction of triethylene tetramine and linoleic acid dimer, and the wetting states of the solid particles of the solid propellant and an adhesive system can be markedly improved, so that the solid particles are easily dispersed, the structural strength for blocking the flow at the inner part of a medicine slurry is reduced, the yield value and the viscidity of the medicine slurry are decreased, and meanwhile, the mechanical performance of the propellant is not influenced.

The invention relates to a method for manufacturing nickel-molybdenum alloy seal head. Technological conditions in the pressing process include that an empty furnace is heated to reach the temperature of 1000+/-80 DEG C, a seal head disk enters the furnace at the temperature higher than or equal to 850 DEG C, the seal head disk is heated to reach the temperature of 1065+/-15 DEG C along with the furnace after entering the furnace, the temperature is kept for 20-30min, and then the seal head disk is tapped off and is pressed at least twice while the seal head disk is hot. Technological conditions for solid solution of the pressed seal head includes that the empty furnace is heated to reach the temperature of 1000+/-80 DEG C, the seal head and a seal head anti-deformation tool enter the furnace after being fixed at the temperature higher than or equal to 850 DEG C, the seal head is heated to reach the solid solution temperature of 1065+/-15 DEG C along with the furnace after entering the furnace, and the seal head is tapped off and rapidly water-cooled after the temperature is kept for 30-45min, so that the high-strength nickel-molybdenum alloy seal head is obtained.

The invention discloses a bionic bone repair material having good machinery performance and biological activity and a preparation method thereof. The preparation method comprises the following steps: 1) using a rapid moulding technology for performing three-dimensional printing on a large aperture PCL rack to obtain a primary structure; 2) activating the surface of the PCL rack having the primary structure; 3) employing collagen network for performing three-dimensional function activation on the PCL rack having the primary structure to obtain a Col-PCL rack having a secondary structure; and 4) employing nano hydroxyapatite particles for bionic mineralization on the Col-PCL rack to obtain an AP-Col-PCL rack having a third structure; The product combines a rapid moulding technology and a biomaterial three-dimensional modification technology, constructs the bionic bone repair material AP-Col-PCL having good machinery performance and biological activity which, and can be used for bone defect research and clinical treatment.

The invention provides a structural flame-retardant functional composite material which comprises a flame-retardant fireproof fiber felt and a composite material, and the surface of the composite material body is coated with the flame-retardant fireproof fiber felt. The invention further provides a preparation method of the structural flame-retardant functional composite material. The preparationmethod comprises the following steps: (1) preparing the flame-retardant fireproof fiber felt; (2) pre-impregnating the fiber felt; and (3) preparing the flame-retardant composite material. Compared with the prior art, a surface flame-retardant structure is adopted, the flame-retardant functional structure layer with the functions of flame retardance, heat insulation, smoke suppression and the likeis concentrated on the surface of the composite material based on the combustion behavior that the composite material expands from outside to inside after being ignited, and in the process that the composite material is on fire, the structure can be used as a fireproofing suit to isolate flame and heat outside the composite material so that the internal structure of the material is protected, andthe damage of a flame retardant to the composite material matrix is avoided.

The invention discloses compound bone cement with high inorganic components. The compound bone cement contains a solid-phase component and a liquid-phase component, wherein the solid-phase component contains P(MMA-co-MPS) surface-modified hydroxyapatite, polymethyl methacrylate, beta-tricalcium phosphate and benzoyl peroxide, and the liquid-phase component contains methyl methacrylate and dimethyl terephthalate; the mass volume ratio of the solid-phase component to the liquid-phase component of the compound bone cement is 1 to (2.5-3.5); and the sum of P(MMA-co-MPS) surface-modified hydroxyapatite and methyl methacrylate is 35%-40% of weight of the solid-phase component. According to the compound bone cement, tricalcium phosphate (beta-TCP) and P(MMA-co-MPS) surface-modified hydroxyapatite are compounded, and meanwhile, the proper modification degree of p(MMA-co-MPS) to hydroxyapatite is adjusted, so that the mechanical performance of the raw materials is guaranteed, meanwhile, the biological activity of the material is increased, and the degradation speed of the material is proper; and therefore, the compound bone cement has excellent mechanical properties and biological properties.

The invention discloses a preparation method of a high-performance heat-insulating composite plate. The preparation method of the high-performance heat-insulating composite plate particularly comprises the following steps: firstly, preparing cellulose toughened silicon dioxide aerogel particles from a cotton raw material as a raw material; secondly, mixing and stirring the prepared cellulose toughened silicon dioxide aerogel particles and cement uniformly; thirdly, sequentially adding a polycarboxylic acid water reducer, river sand, nanometer titanium dioxide, a foam stabilizer, a curing agentand deionized water, and mixing and stirring uniformly; fourthly, adding a foaming agent and stirring to prepare slurry; and finally, putting the prepared slurry into a mold to perform compression molding, and maintaining, demolding and cutting to prepare the high-performance heat-insulating composite plate. The prepared composite plate has excellent mechanical property and high heat-insulating property.