42results about How to "Sufficient mechanical properties" patented technology

The invention discloses a polypropylene composite material with low after shrinkage, a high modulus and high impact resistance, which consists of the following raw materials in percentage by weight: 50 to 80 percent of polypropylene, 10 to 30 percent of inorganic filler, 5 to 25 percent of an elastomer toughening agent, 0 to 1 percent of a nucleating agent, 0.1 to 2 percent of a stabilizer and 0 to 5 percent of other additives. The polypropylene composite material has the advantages as follows: 1, an ethylene-butylene copolymer is used as the elastomer toughening agent, so that compared with conventional toughened and modified polypropylene, the polypropylene composite material has obviously reduced after shrinkage and has higher size stability; 2, the nucleating agent is used as a crystallization promoter agent of the material, so that after shrinkage of the polypropylene material can be further reduced and size stability can be further improved; 3, the ethylene-butylene copolymer is used as the elastomer toughening agent, so that compared with the conventional toughened and modified polypropylen, the polypropylene composite material has higher low-temperature toughness.

The present invention relates to a textile type artificial blood vessel with double-layer machine-woven structure. It is characterized by that it includes outer layer machine-woven structure whose water permeability is 1000-3000 ml / sq.cm.min.16kPa and inner layer machine-woven structure whose water permeability is 250-300 ml / sq.cm.min.16kPa, and adopts stitching warp or stitching weft to make the above-mentioned outer layer machine-woven structure and inner layer machine-woven structure be combined together so as to obtain the invented artificial blood vessel.

The present invention provides one kind of woven artificial blood vessel in double layer structure. The woven artificial blood vessel includes one woven outer layer and one inner layer of nanometer fiber. The woven artificial blood vessel can prevent blood permeation during surgical operation, is favorable to smooth growth of cell tissue to its inside after operation, and has high mechanical strength enough for being crinkled and being handled in operation.

The invention discloses aluminum alloy and an LED lamp substrate applying the aluminum alloy. The aluminum alloy comprises the following compositions in percentage by weight: more than or equal to 0.5 percent and less than or equal to 12 percent of Si, more than or equal to 0.1 percent and less than or equal to 1.5 percent of Mn, less than or equal to 1.2 percent of Fe, less than or equal to 4.5 percent of Cu, less than or equal to 0.5 percent of Mg, more than or equal to 0.005 percent and less than or equal to 0.85 percent of RE, less than or equal to 0.5 percent of inevitable impurities, and the balance of Al, wherein the RE is selected from at least one of La, Ce, Nd and Yb. The LED lamp substrate is provided with a copper plate and an aluminum alloy plate, and the copper plate and the aluminum alloy plate are jointed into a whole through high pressure forming. The aluminum alloy has excellent thermal conductivity and high temperature antioxidation performance, and is suitable for manufacturing the LED lamp substrate. The LED lamp composite substrate completely solves the problems of deformation and oxidation caused by uneven thermal expansion coefficients of two materials for the substrate and a lamp shell in the prior art, and contributes to manufacture of high power LED lamps in low cost.

The present invention relates to a textile type artificial blood vessel with double-layer warp-knitted stitch structure. It is characterized by that it includes outer layer warp-knitted structure whose water permeability is 1000-3000 ml / sq.cm.min.16kPa and inner layer warp-knitted structure whose water permeability is 250-300ml / sq.cm.min.16kPa, the outer layer warp-knitted structure of said blood vessel is cord stitch, and the inner layer warp-knitted structure of said blood vessel is tricot stitch. Said invention adopts a two-bar warp-knitted fabric to make the above-mentioned outer layer warp-knitted structure and inner layer warp-knitted structure be combined together so as to obtain the invented artificial blood vessel.

Am embedded expandable plate for car is prepared through prepairng the foaming mother particles from resin, foaming agent, foaming assistant and disperser, proportionally mixing then with polyolefin resin and cross-linking agent, and injection moulding.

The invention provides a high-performance clutch plate for a heavy truck. The high-performance clutch plate for the heavy truck achieves the technical purposes of being novel in structure, reasonable in material formula and balanced and excellent in performance index, cost and application effect. The high-performance clutch plate for the heavy truck is divided into a friction working layer and a structural layer. The friction working layer comprises at least three friction linings made of different materials. The three friction linings made of the different materials comprise the rubber-based friction linings, the substitute rubber FA friction linings and the ceramic fiber friction linings, all of which are of the same thickness. The high-performance clutch plate has the following beneficial effects that due to the fact that the rubber-based friction linings, the ceramic fiber friction linings and the substitute rubber FA friction linings are arranged on the surface of the structural layer in a mixed manner, in clutch operation of the clutch plate, the characteristics of the three different materials can be brought into play, when the clutch plate is applied to a clutch mechanism of the heavy truck, friction force resistant to attenuation and stable at high temperature is effectively reduced, and the high-performance clutch plate is particularly suitable for being applied to the heavy truck.

The invention discloses a water-drop type carbon fiber tyre bead core used for a tyre and a forming method of the tyre bead core. The section of the tyre bead core is in a water-drop shape, and the tyre bead core is made of a composite material of carbon fiber bundles coated by a binder. The forming method comprises the following steps: firstly winding the tail end of a continuous carbon fiber composite material tyre bead core strip in an internal hollow cavity of a rotation mold through an opening of the upper part of the mold; and afterwards rotating the rotation mold at a certain speed around a center rotation shaft and continuously delivering the composite material tyre bead core trip of the carbon fiber bundles coated by the binder at the same time so that continuous winding is continuously generated in the hollow cavity of the mold until the carbon fiber tyre bead core having the same water-drop shape with the section of the hollow cavity of the mold is formed. With the adoption of the water-drop type carbon fiber tyre bead core, a tyre bead can be tightly fixed in a wheel rim so that an accident of the wheel rim taking off from the tyre is avoided or the tyre is prevented from slippage or rotation relative to the wheel rim. In addition, the sinking amount of the tyre with the structure can be reduced, and the riding comfortableness and safety are increased.

The invention relates to a method for preparing an in-situ tissue engineering blood vessel by a composite process. According to the invention, a three-layer composite intravascular stent which is similar to a natural vascular structure and is used for in-situ tissue engineering is prepared by combining rapid prototyping, electrostatic spinning and wet spinning processes; wherein the inner layer isa tubular stent provided with an axial groove by utilizing 3D printing and electrostatic spinning technologies; a middle layer is a tubular stent which is prepared by wet spinning and is provided with circumferentially arranged fibers; and the outer layer is the tubular stent which is prepared by the coatable inner layer obtained by electrostatic spinning and the disordered fibers at the middle layer. Through heparinization, the vascular endothelial cell growth factor is loaded, so that cells can be collected in a host, the infection opportunity of in-vitro culture is reduced, the preparationof in-situ tissue engineering blood vessels is realized, and the method has a wide prospect in the field of tissue engineering blood vessels.

The invention provides an anodic aluminum level dyeing retarding aid. The anodic aluminum level dyeing retarding aid comprises a first active ingredient, a second active ingredient and an auxiliary additive; the first active ingredient comprises one or more of compounds containing a carboxylic acid group, carboxylates, substituted carboxylates, carboxylic acid anhydride, amino acid salts and amino acid anhydride; the second active ingredient comprises a compound containing a sulfonic acid group and / or a sulfonate; and the auxiliary additive comprises one or more of a pH stabilizer, an anti-caking agent and an anti-scaling agent. The aid has an excellent level dyeing retarding effect, and is capable of solving the problem of easy local chromatic aberration or surface floating in the dyeing step of anodized aluminum in the prior art and smoothly realizing chromatic aberration-free undertint dyeing and finishing under the circumstance of keeping excellent mechanical and chemical properties of an anodized film. The invention also provides an anodic aluminum level dyeing retarding aid operating liquid based on the aid, and an anodic aluminum level dyeing retarding treatment process.

The invention discloses a preparation method of an aluminum alloy profile for a high-power LED (light-emitting diode) lamp substrate. The aluminum alloy profile comprises the following elements in percentage by mass: 1.2-1.8% of Si, 2.6-3.4% of Cu, 0.5-1.0% of Ag, 0.3-0.6% of Be, 0.2-0.4% of W, 0.25-0.35% of Mn, 0.1-0.2% of Zn, 0.2-0.3% of Ni, 0.05-0.15% of Fe, 0.03-0.07% of Pd, 0.02-0.04% of Nd, 0.01-0.02% of Tb and the balance of Al. The aluminum alloy profile has the advantages of high heat conductivity, excellent heat dispersion property and sufficient mechanical properties, and thus, is suitable for manufacturing the high-power LED lamp substrate. The aluminum alloy profile can improve the working reliability and service life of the LED lamp, lowers the production cost, and is suitable for industrial production and large-scale popularization.

The invention discloses a composition for rigid polyurethane foam. The polyurethane foam is prepared from the following components in parts by weight: 3 to 5 parts of polyether polyol A, 2 to 4 partsof polyether polyol B, 2 to 4 parts of polyester polyol C, 0.1 to 0.5 part of foam stabilizer, 0.1 to 0.3 part of pore opening agent, 0.2 to 0.6 part of catalyst, 0.2 to 1.0 part of water and 1 to 3 parts of flame retardant. The preparation method can be used for preparing the rigid polyurethane foam, and comprises the following steps: mixing the composition for the rigid polyurethane foam with isocyanate, and pouring the mixture into a foaming reaction mold for foaming reaction molding. The rigid polyurethane foam is of an open-cell structure, the foam density is larger than or equal to 30 kg / m < 3 >, the compressive strength is larger than or equal to 100 kPa, the aperture ratio is larger than or equal to 80%, the flame retardant property reaches the DIN 4102 B2 level, and the rigid polyurethane foam has good heat preservation performance and voice absorption performance and can be used for preparing plates with voice absorption performance.

The invention discloses a clutch facing, which consists of a frictional working layer and a structural layer, wherein the frictional working layer is a working face; the back of the frictional working layer is provided with the structural layer; the number of the structural layer can be one or more, and the structural layers can be divided into a heat transfer layer and a support layer according to the action, wherein the heat transfer layer can be used as required; the frictional working layer participates in the friction operation and provides friction and abrasion properties required during using; the structural layer does not participate in the friction operation and provides other auxiliary properties for a clutch facing product; and the whole clutch facing product consists of two or more layers according to the property requirement. The frictional working layer and the structural layer are combined and thermally pressed to form the clutch facing so as to improve the comprehensive performance thereof and reduce the comprehensive cost.

The invention discloses a graphene modified degradable material and application thereof. Matrix resin in raw material components of the degradable material comprises degradable resin and a graphene modified glycollic acid polymer. The graphene-modified glycollic acid polymer is obtained by carrying out a grafting reaction on functionalized graphene and a glycollic acid polymer, or is obtained by physically blending the functionalized graphene and the glycollic acid polymer.

The invention discloses an antibacterial yarn, and belongs to the technical field of textile. The yarn is prepared from two or more than two of synthetic quaternary ammonium type, quaternary phosphine salt type and silver-loaded cotton fiber type antibacterial fibers in patents of CN101879466B, CN102720057B, CN103266473B and CN103835124B, one or more of cotton, viscose, tencel, dacron, chinlon, modal and soybean fiber blended fibers, and bamboo charcoal fibers by processes of opening picking, combining, cotton carding, drawing, roving, spinning and the like. A fabric made of the antibacterial yarn resists staphylococcus aureus, escherichia coli and pseudomonas aeruginosa, and is good in antibacterial property; and even if the fabric is cleaned by fifty times, the antibacterial property of the fabric can be maintained and regenerated. The antibacterial fabric not only has good antibacterial property, but also is good in spinning property, light in weight and excellent in mechanical strength; series of products such as antibacterial socks and antibacterial underwear can be developed; and skin adaptability, hygroscopicity, degree of comfort and the like are improved.

The present invention relates to a textile type artificial blood vessel with double-layer warp-knitted stitch structure. It is characterized by that it includes outer layer warp-knitted structure whose water permeability is 1000-3000 ml / sq.cm.min.16kPa and inner layer warp-knitted structure whose water permeability is 250-300ml / sq.cm.min.16kPa, the outer layer warp-knitted structure of said bloodvessel is cord stitch, and the inner layer warp-knitted structure of said blood vessel is tricot stitch. Said invention adopts a two-bar warp-knitted fabric to make the above-mentioned outer layer warp-knitted structure and inner layer warp-knitted structure be combined together so as to obtain the invented artificial blood vessel.

The invention relates to a hot-dip galvanized steel wire-10% aluminum-rare earth alloy solution of hot-dip coating steel wire comprises 8.3-15% of Al, 0.11-0.30% of Ce+La, less than or equal to 0.075 % of Fe, less than or equal to 0.015% of Si, less than or equal to 0.005% of Pb, less than or equal to 0.005% of Cd, less than or equal to 0.002% of Sn and less than or equal to 0.02% of every other element; the total quantity of other elements is less than or equal to 0.04%, and the rest is Zn. The invention has the advantages that 1. by utilizing the cathodic protection function of Zn, the Zn and the Al are used for generating an Al2O3 protecting film on the surface of the steel wire, so that the corrosion-resistant performance of the steel wire is greatly improved; 2. rare earth is used for improving the condition of hot-dip coating, so as to greatly improve the fluidity and wetting quality of plating solution, and effectively inhibit grain-boundary corrosion; 3. hot-dip coating can be carried out at the temperature of below 480 DEG C, and enough plating thickness and steel material mechanical property can be obtained, so that the popularization value is good.

The invention relates to an aluminum alloy pre-strengthening hot stamping forming method. The method comprises the following steps that a W-state aluminum alloy plate after solution quenching is pre-strengthened in a lower temperature range to obtain hot stamping blanks supplied in batches; and the pre-strengthened plate is transferred to a hot stamping production line for heating, and after heatpreservation is carried out for 30 seconds to 5 minutes, a hot stamping process is carried out. After the hot stamping plate is pre-strengthened, a GP zone structure can be formed and is larger in size and more stable than a T4 state, so that the transformation of a pre-precipitated structure to a metastable strengthening phase is facilitated in the subsequent hot stamping process, and in addition, the performance of a formed part exceeds a T6 state and even approaches a T8 state through a processing hardening effect generated in the hot stamping process. According to the process method, the pre-strengthened aluminum alloy blanks are supplied in batches, so that the hot stamping production efficiency is effectively improved, and the use performance of the product is guaranteed.

The invention discloses a liquid silicone rubber for a middle-high voltage cold-shrinkable cable accessory dry terminal and a preparation method of the liquid silicone rubber. The liquid silicone rubber is mainly prepared from the following components in parts by weight: 60-85 parts of vinyl terminated hexamethyldisilazane, 20-40 parts of gaseous-phase white carbon black, 5-15 parts of hexamethyldisilazane, 10-20 parts of nanometer aluminum hydroxide, 0.1-0.3 part of carbon black, 1-2 parts of platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane, 1-2 parts of low hydrogen containing silicone oiland 5-10 parts of a silane coupling agent. The preparation method mainly comprises the following steps of base glue preparation, grinding, filtering, A component and B component preparation and the like. According to the preparation method provided by the invention, after actual testing, a liquid silicone rubber product has good insulating performance and has enough mechanical performance at thesame time, is difficult in tensile deformation and can thoroughly meet the use requirement for middle-high voltage cold-shrinkable accessories in production. The liquid silicone rubber provided by theinvention has the advantages of strong insulating performance, better fluidity, good tensile rebound resilience and the like.

The technical problem to be solved by the present invention is to provide a high-performance clutch facing for heavy trucks with novel structure, reasonable material formula, balanced performance index, cost and application effect. A high-performance clutch face plate for heavy goods vehicles, which is divided into a friction working layer and a structural layer, the friction working layer includes friction linings of at least three different materials; the three friction linings of different materials include rubber of the same thickness Base friction lining, replacement rubber FA friction lining and ceramic fiber friction lining; the beneficial effects of the present invention are as follows: the structure layer surface of the present invention is provided with rubber-based friction lining, ceramic fiber friction lining and replacement rubber FA The friction lining not only enables the clutch plate to play the characteristics of the three different materials during the clutch operation, but when the clutch plate is used in the clutch mechanism of a heavy-duty truck, it can effectively reduce the fading resistance in high temperature and maintain a stable friction force, especially suitable for Used in heavy goods vehicles.

The invention relates to an aluminum alloy pre-strengthening hot stamping forming method. The W-state aluminum alloy plate after solution quenching is subjected to pre-strengthening treatment in a lower temperature range to obtain hot stamping blanks supplied in batches. Transfer the pre-strengthened sheet material to the hot stamping production line for heating, heat it for 30 seconds to 5 minutes and then carry out the hot stamping process. After pre-strengthening treatment, the hot stamping sheet can form a larger and more stable GP zone structure than the T4 state, so in the subsequent hot stamping process, it is conducive to the transformation of the pre-precipitated structure into a metastable strengthening phase. In addition, the hot stamping process The work hardening effect produced in the process makes the performance of the parts after forming can exceed the T6 state or even approach the T8 state. The process method can effectively improve the production efficiency of hot stamping through the batch supply of pre-strengthened aluminum alloy blanks, and at the same time ensure the performance of the product.

The invention discloses a clutch facing, which consists of a frictional working layer and a structural layer, wherein the frictional working layer is a working face; the back of the frictional working layer is provided with the structural layer; the number of the structural layer can be one or more, and the structural layers can be divided into a heat transfer layer and a support layer according to the action, wherein the heat transfer layer can be used as required; the frictional working layer participates in the friction operation and provides friction and abrasion properties required during using; the structural layer does not participate in the friction operation and provides other auxiliary properties for a clutch facing product; and the whole clutch facing product consists of two ormore layers according to the property requirement. The frictional working layer and the structural layer are combined and thermally pressed to form the clutch facing so as to improve the comprehensive performance thereof and reduce the comprehensive cost.

The invention discloses a folic acid-modified polyvinyl alcohol medicinal polymer material used in soluble microneedles and a preparation method thereof. The specific steps of the method of the present invention are as follows: (1) First, add sodium hydroxide and acrylamide solid to the polyvinyl alcohol aqueous solution at a temperature of 90 to 100°C to perform a Michael addition reaction to obtain acrylamide-modified PVA; (2) Dissolve the acrylamide-modified PVA in deionized water, add the activated folic acid aqueous solution dropwise with stirring and avoid light, stir the reaction, and then dialyze and purify to obtain the folic acid-modified polyvinyl alcohol material. The yield of the polymer obtained by the method is high, the material obtained has good solubility, is conducive to degradation, and has a small dosage, which can reduce the residue of the polymer in the skin after microneedle administration. The microneedles produced by pouring a lower polymer concentration solution into the microneedle mold have obvious needle shapes; the microneedles can penetrate tin foil and have sufficient mechanical properties, and can be used in transdermal drug delivery systems to achieve a certain drug loading rate of microneedles. preparation.

The invention relates to a bow suspension for a current collector of electrically driven vehicles, in particular rail vehicles. Said bow suspension comprises a frame (1) which has a pantograph contact strip (11) that is supported on an apex shaft (3) by a spring arrangement (2, 2'), said apex shaft (3) being rotatably mounted in an apex tube for connection to a chassis of the current collector. The spring arrangement (2, 2') of said bow suspension has a torsion spring (23, 23') and exhibits a defined rigidity that is independent of the airstream, even at high-speed operation, and a vertical spring displacement which is predetermined by the network operator.

The invention discloses a stainless steel tube optical unit connection process, which comprises the following steps of stripping, tube insertion, welding, tube moving and wrapping, namely inserting one end of a first inner insertion tube into a connection port of a first stainless steel tube optical unit, pressing and fixing, sleeving a sleeve on the outer circle of the part, not inserted into the first stainless steel tube optical unit, of the first inner insertion tube, and welding the first inner insertion tube with the sleeve; inserting one end of a second inner insertion pipe into the connecting port of the second stainless steel pipe optical unit, and pressing and fixing the end of the second inner insertion pipe; welding the exposed end parts of the optical fibers at the end parts of the first inner insertion tube and the second inner insertion tube; the sleeve is moved outwards, so that the first inner insertion pipe and the second inner insertion pipe are sleeved with the sleeve at the same time; and wrapping the exposed part on the outer circle of the first inner insertion pipe by adopting a heat shrink tube. By means of the mode, the stainless steel tube optical unit connecting technology can effectively repair the damaged optical unit, and the length of the optical unit and the optical fiber communication performance are recovered.

The invention discloses a method for manufacturing an artificial blood vessel. The artificial blood vessel is a cylindrical main blood vessel. The method is characterized in that the artificial blood vessel is knitted on a warp knitting machine with double needle beds, the warp knitting machine with the double needle beds is provided with at least four ground guide bars and at least twelve pattern guide bars, two pattern guide bar operating lines are arranged between each two adjacent ground guide bars, and each operating line comprises two pattern guide bars; warp yarns are strung and sleeved together by means of looping knitting actions among looping elements, the ground guide bars and the pattern guide bars, so that two netted platy fabrics comprising loops are formed on the two needle beds of the warp knitting machine; owing to looping knitting actions among the looping elements and the pattern guide bars and swinging actions of the guide bars, and the warp yarns are alternately looped on the two needle beds of the warp knitting machine, so that the two netted platy fabrics are connected with each other to form a fabric of the cylindrical main blood vessel. The method has the advantages that the artificial blood vessel which is knitted by the method has functions of promoting cell tissue ingrowth and preventing blood from permeating from the wall of the vessel during surgery, and the method can be used for knitting various blood vessel structures.

The buckle device (9) for the vehicle hinge (1) includes: a mounting hole (67) for mounting on the pivot (7) of the hinge; a stopper (71) configured to be mounted on the pivot The first steering knuckle (5) of the hinge on the shaft engages, the stopper thus rotatably connects the snap-fit ​​device with the first steering knuckle; and the snap-fit ​​member (73) for the second steering knuckle with the hinge Section (3) is engaged. The first knuckle and the second knuckle are mounted to pivot about the pivot axis between an open orientation and a closed orientation, the snap member being configured to engage the second steering knuckle when in the open orientation. knuckle engagement, thereby rotationally connecting the second steering knuckle and the snap-fit ​​device together. According to the invention, the buckle device does not contain metal material.

The invention relates to an insulated roller profile guide rail assembly. The insulated roller profile guide rail assembly comprises a composite material roller and a guide rail profile; the compositematerial roller comprises a fixed shaft; and the fixed shaft of the composite material roller is fixedly connected with the guide rail profile. The insulated roller profile guide rail assembly is characterized in that the composite material roller further comprises an internal roller and an external roller; the fixed shaft is arranged in a shaft hole of the internal roller; the internal roller isarranged in an internal hole of the external roller; the internal roller is in tight fit with the external roller; the internal roller is injection-molded from a mixed material consisting of glass fiber reinforced nylon and a solid lubrication material, wherein the mass ratio of the glass fiber, the nylon and the solid lubrication material is 20-35:45-70:10-20, and the percentage sum of all components is 100%; and the external roller is injection-molded from high glass fiber reinforced polyamide resin, wherein the content of the glass fiber is 40-60%. The insulated roller profile guide rail assembly has the advantages of high load and low resistance.