113results about How to "Mechanical properties unchanged" patented technology

The invention relates to glass fiber reinforcing nylon 6-polypropylene alloy material. The invention is characterized in that the invention adopts nylon 6 and polypropylene as the matrix resin, and under the condition that the addition level of plasticizer is not changed, the invention can achieve and is preferable to the mechanical property of the unilateral enforced nylon 6 material without polypropylene added, in particular to the impact property. The matrix resin, the plasticizer as well as the antioxidant are evenly mixed and then enter into a double screw extruder, simultaneously glass fiber is added from the special glass fiber opening of the double screw extruder, and the matrix resin, the plasticizer, the antioxidant and the glass fiber are cooled, dried and palletized to be produced into finished products after being mixed together and extruded. The invention has the advantages that the plasticizer can be self made, the cost of the alloy material is low, the invention has good impact property, and the other mechanical properties are kept unchanged basically.

The invention discloses an epoxy modified polyurethane ultra-low temperature resistant adhesive. The components and the mass percentage of the adhesive are: 30-50 percent of polyurethane modified prepolymer, 5-15 percent of epoxy resin, 10-20 percent of solvent, 1-15 percent of chain extender, and 30-50 percent of filler. First, uniformly blend all the liquid components, and then add solid components to uniformly blend, and pack after grinding on a grinding mill. The epoxy modified polyurethane ultra-low temperature resistant adhesive of the invention has the nature of ultra-low temperature resistance, the mechanical property of which can remain stabilized even being used for a long term at 200 DEG C below zero, and has the advantages of high bond strength and shear strength as well as good cohesiveness and corrosion resistance.

The invention discloses a pressure-yielding anchor device, which comprises an extrusion head, a pressure-yielding sleeve and anchor bars, wherein the extrusion head is a cylinder with the conical surface at the lower part and movably connected with the anchor bars into a whole; and the extrusion head is arranged in the pressure-yielding sleeve, the raised surface matched with the conical surface at the lower part of the extrusion head is arranged on the inner wall of the pressure-yielding sleeve, the pressure-yielding sleeve is a steel pipe with a raised edge on the inner wall preferably, andthe raised surface matched with the conical surface of the extrusion head is arranged at the end part of the raised edge. By adopting the pressure-yielding anchor device, the purposes of yielding pressure, dissipating energy and controlling deformation can be realized during anchoring, and the pressure-yielding anchor device is applicable to the anchor bars made of any material. The pressure-yielding anchor device is convenient to manufacture, reliable in effects and applicable to different engineering needs.

The invention discloses a resource-saving Q345 low-alloy series steel plate and a production method thereof. The steel plate comprises the following chemical components in percent by weight: 0.15 to 0.18 percent of C, 0.15 to 0.50 percent of Si, 1.10 to 1.25 percent of Mn, not more than 0.030 percent of P, not more than 0.035 percent of S, 0 to 0.045 percent of Alt, not more than 0.44 percent of carbon equivalent, and the balance of Fe and inevitable impurities. The production process of the steel plate comprises 150 t converter, LF external refining, slab continuous casting, slab heating, steckel mill controlled rolling, controlled cooling, thermal straightening, cooling, shearing and mark warehousing. The resource-saving Q345 low-alloy series steel plate, produced by the production method, has the yield strength of 360 to 420 MPa, the tensile strength of 500 to 550 MPa, and the elongation of 24 to 32%, and acicular ferrite with the thickness of 3 to 6 mm, polygonal ferrite, degenerate perlite and a small amount of granular bainite are arranged on the surface layer of the steel plate.

The invention relates to an expansive char-forming flame-retardant polypropylene composition and a production method thereof. The composition comprises the following components: 100 weight parts of polypropylene, 10-30 weight parts of ammonium polyphosphate, 2.8-8.3 weight parts of pentaerythritol, 2.8-8.3 weight parts of melamine cyanurate and 0.5-5 weight parts of montmorillonite. The total additional amount of ammonium polyphosphate, pentaerythritol and melamine cyanurate is at least 31 weight parts. The production method comprises the following steps: proportioning all components (including polypropylene, ammonium polyphosphate, pentaerythritol, melamine cyanurate and montmorillonite) at the given ratios, melting, mixing, extruding and granulating. The composition has better flame retardation, good processability and mechanical property. The production method is simple and reliable.

The invention discloses a sericite-modified UV-resistant polymer master batch and a composite material thereof. The composite material of polyolefine and master batch has parallel orientation of sericite with high diameter-thickness ratio in plastics. The ultraviolet absorption rate of the material is more than or equal to 90%. The sericite-modified UV-resistant polymer master batch is composed of surfactant-modified sericite and polymers, wherein the polymers account for 5-30% of the total weight of sericite and polymers, and the surfactant accounts for 3-8% of the total weight of sericite and polymers.

The invention discloses a low-density wood plastic board and a preparation method thereof and belongs to the technical field of decorative materials. The technical scheme is that: the low-density wood plastic board is prepared from the following raw materials in part by weight: 35 to 60 parts of plastic particles, 20 to 60 parts of wood meal, 0.3 to 1 part of azodicarbonamide (AC) foaming agent, 1 to 5 parts of maleic anhydride grafted coupling agent, 0.15 to 0.5 part of nucleating agent and 0.15 to 0.6 part of antioxidant; and the low-density wood plastic board is processed by the process steps of material weighing, material mixing, extrusion and calendaring. Compared with the prior art, the invention has the advantages that the low-density wood plastic board can be recycled and is renewable; and the overall weight of the low-density wood plastic board is reduced by the microfoaming process, so that the energy is saved, the cost is reduced, and the economic benefit of enterprises is improved.

This invention discloses a process for preparing a lightweight nylon, wherein a lightweight or hollow inorganic material, after surface treatment with the silane coupling agent, is mixed withªŠ-hexanolactam and then cast to prepare a lightweight nylon-6. The density of the lightweight nylon is much lower while its mechanical properties are reserved. Besides, the product appears white and bright, and can be widely used in the decoration area as a heat-resisting material. This invention provides a simple process for preparing a lightweight nylon with reduced production cost.

The invention provides a soaking-resistant weather-resistant halogen-free flame-retardant polypropylene material, a preparation method and application thereof. The halogen-free flame-retardant polypropylene material is prepared from the following raw materials by mass: 55-75 parts of polypropylene resin, 30-38 parts of a halogen-free flame retardant, 0-6 parts of filler, 0-10 parts of glass fibermaster batch, 0.5-0.8 part of a lubricant, 0.5-1.2 parts of an antioxidant and 0.5-1 part of a light stabilizer; wherein the halogen-free flame retardant comprises piperazine pyrophosphate and melamine polyphosphate. The halogen-free flame-retardant polypropylene material has high flame retardancy, does not fail in flame retardancy after being soaked in water at 70DEG C for 7 days, has mechanicalproperties maintained up to 90% or more, and has the flame retardancy maintained after being exposed to irradiation by a xenon lamp for 1000h, and the mechanical properties are maintained up to 90% ormore, and passes through the 2.0mm thickness UL94-5VA test. Also the preparation method is simple and easy to control, and the soaking-resistant weather-resistant halogen-free flame-retardant polypropylene material can be used for electric appliance parts with a fireproof grade of UL94-5VA.

The invention relates to a carbon steel plate for a seal head of a middle and low temperature pressure vessel. The carbon steel plate for the seal head of the middle and low temperature pressure vessel contains chemical components by weight percentage: 0.14-0.18% of C, 0.25-0.45% of Si, 1.10-1.30% of Mn, P<=0.010%, S<=0.003%, 0.02-0.05% of Al, 0.010-0.050% of Nb, 0.010-0.030% of Ti, 0.15-0.35% ofNi, 0.10-0.30% of Cu, and the balance Fe and unavoidable impurity elements, wherein the weight percentage ratio of Ni and Cu is not less than 1, carbon equivalent Ceq is not bigger than 0.43%, and thecomputational formula of the carbon equivalent is as following: Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. A delivery state of the carbon steel plate is a normalizing rolling state, and the product is good in internal quality, and low in carbon equivalent and surface Brinell hardness. After simulated thermal forming, simulated normalization and simulated post-welding heat treatment are sequentially performed on a rough specimen, the rough specimen still has excellent mechanical performance, and can completely meet development needs of petrochemical industry.

The invention provides a heat dissipation coating used for LED lights and a preparation method thereof. The coating is characterized by comprising the following raw materials by weight parts: 45-48 parts of aniline formaldehyde resin, 3-4 parts of a silane coupling agent KH 5503, 32-36 parts of aluminium nitride powder, 4-6 parts of beryllia, 6-8 parts of silicon carbide, 25-30 parts of xylene, 16-18 parts of ethyl acetate, 3-5 parts of aminopropyl triethoxysilane, 2-3 parts of phenol, 2-3 parts of zine stearate, 4-6 parts of aliphatic acid glyceride, 1-2 parts of butyl mercaptan tin, 3-4 parts of bi-propylene tri-amine, 4-6 parts of dibenzyl amine ether and 5-6 parts of a film forming agent. According to the invention, organic silicone resin is used to form film and solidify, and the formed film is excellent in moisture resistant, waterproof, antirust, cold resistant, ozone resistant and weather resistant performances. The coating is anti-aging, large in adhesion stress and good in heat radiation effect, can be used for a long time under 200 DEG C, and has unchangeable mechanical properties. The beryllia and the silicon carbide are added into the raw materials to increase a wear resistant performance of the coating, and the coating can be used for a long time under 200 DEG C.

The invention relates to a rare-earth aluminum alloy aluminum ingot binding packaging tape and its making method, made by melting Al, Zn, Mg, Rare-earth, Ti, Zr, Cr, Mn, etc, it has cross section area 25-35 mm wide X1.0-1.5mm thick, tensile strength up to 350-400MPa, elongation up to 10-15%, adn good shock resistance, overcomes the defects in existing steel bands, does not corrode and change mechanical property for long time storage, has high strength, and can directly lift the whole bundle of aluminum ingots in a top-loading aluminum smelting furnace, improving working efficiency. It is smooth, no-burr, and unable to damage hands at the time of operation, etc.

The invention relates to welding of glass materials in the technical field of laser processing, and particularly relates to a glass material ultrafast laser precision welding system and method. The glass material ultrafast laser precision welding system and the method solve the welding quality problem caused by the fact that the surfaces of glass cannot be precisely attached in the existing two-layer or multi-layer glass plate welding process, and the welding quality problem caused by stress distribution between two adjacent layers of glass is solved. The glass material ultrafast laser precision welding system comprises a clamping and preprocessing module, an optical module, a planar motion module and a vertical motion mechanism; the optical module comprises an ultrafast laser and a lightbeam modulation unit composed of a polarization splitting prism, a Faraday rotator, a reflection type light beam modulator and a telecentric micro-focusing lens; and the laser beams are precisely regulated and controlled through the light beam modulation unit, and integrated control over the welding strength and interlayer stress distribution of the double-layer or multi-layer glass plate is achieved. Meanwhile, and the invention further provides a welding method based on the glass material ultrafast laser precision welding system.

The invention discloses a method for preserving bone tissue materials. The method for preserving the bone tissue materials comprises the steps that (1) the bone tissue materials are cleaned; (2) the bone tissue materials are placed into a povidone iodine preservation solution with mass concentration of 0.01%-0.5%, the mixture is stored in refrigeration equipment, and the storage temperature is lower than 0 DEG C; and (3) the bone tissue materials stored in a refrigerated mode and the immersion liquid are transferred to the refrigeration, and the mixture is taken out after thawing, the mixtureis soaked by 0.9% physiological saline, a ringer's solution or phosphate buffer and then cleaned, and the mixture can be used as a bone graft tissue. The preservation solution uses sodium bicarbonateor the phosphate buffer as a pH adjuster such that a pH value of the preservation solution is between 5.8 and 8.0. According to a cryopreservation bag, the side edge of a part of the bag body is openthe bag body is connected with a flow guiding hose, and the outer end of the hose is closed. According to the method for preserving the bone tissue materials, the integrity of a bone tissue structureis maintained, and the mechanical properties are kept unchanged; and organic components and inorganic components of the bone tissue materials are not lost, so that the suffering and economic burden ofthe patient are alleviated.

The invention discloses a binder used between urethane foam and glass fiber reinforced plastic of LNG ships, which comprises the following compositions by mass percentage: 30 to 50 percent of organosilicone polyurethane modified prepolymer, 5 to 15 percent of epoxide resin, 10 to 20 percent of solvent, 1 to 15 percent of chain extender, 1 to 10 percent of vermiculite, 10 to 18 percent of SiO2, 10 to 20 percent of CaCO3 and 2 to 10 percent of CaCl2. The liquid compositions are uniformly mixed firstly, and then added with the solid compositions for uniform stirring, and the mixture is ground on a grinding machine and then packaged. The binder used between the urethane foam and the glass fiber reinforced plastic of the LNG ships has large binding power between the urethane foam and the glass fiber reinforced plastic, and properties of ultralow temperature resistance and water resistance, and can be used at 200 DEG C below zero for a long time and keep the mechanical property to achieve the aim of fully protecting heat insulating materials.

The invention provides a weather-resistant halogen-free flame-retardant polypropylene material as well as a preparation method and application thereof. The weather-resistant halogen-free flame-retardant polypropylene material is prepared from the following raw materials in parts by mass: 55-75 parts of polypropylene resin, 20-38 parts of halogen-free flame retardant, 1-3 parts of a flame-retardantsynergist, 0.5-0.8 part of a lubricant, 0.5-1.2 parts of an antioxidant and 0.3-1 part of a light stabilizer; wherein the halogen-free flame retardant comprises microcapsule ammonium polyphosphate and a charring agent. The weather-resistant halogen-free combustion-supporting polypropylene material has a high flame retardant performance (UL94 V-0 and UL1694 SC-0 with a thickness of 0.75 mm), and after being soaked in water at 70 DEG C for 7 days, at least 90% of mechanical properties are still maintained. After the material is irradiated by a xenon lamp for 1000 hours, at least 90% of mechanical properties are maintained. In addition, the preparation method is simple and easy to control. The material is applied to a soft core of decorative lighting.

The invention relates to a spacer fabric, a spacer fabric section and a heatable cladding element. The spacer fabric includes a face-shaped first fabric layer (1) having a transmission yarn (4), a face-shape fabric layer (2) and a spacer yarn (3) which is connected to the fabric layers (1, 2). The conduction yarn (4) has a conductive coating (7). A conduction stripe (5) which extends comprehensively in the first fabric layer (1) or along a production direction has adjacent conduction yarns which are in direct electrical connection. The conduction yarn (4) forms a coil with an inlay in at least two coil columns in the first fabric layer (1), and in a conductive synthesized material yarn (4), the content of the conductive coating (7) is less than 50 weight %. The invention also relates to a spacer fabric section composed of the spacer fabric and a heatable cladding element which has the spacer fabric section and a covering layer.