40results about How to "Does not affect tensile strength" patented technology

The invention provides a flame-retardant resin composition. The composition comprises hydrogenated styrene-butadiene block copolymers, polypropylene and/or polystyrene, a flame retardant and a compatilizer, wherein the composition also comprises silicone oil. The flame-retardant resin composition has good mechanical property and high stretching strength of 100 percent.

The invention discloses a preparation method for waste carboxyl nitrile gelatine powder and PVC blend. The preparation method comprises the following steps that: plasticizer, heat stabilizer and PVC mixture are added in a double-roller feed mill to carry out preplasticizing, and then initiator, modifier and crushed waste carboxyl nitrile gelatine powder are added in turn to carry out milling; then, after stem pressing is completed inside a flat vulcanizing machine, a test block is quickly moved to a chilling press and demoulding is carried out after the test block is cooled down to room temperature, thereby obtaining the waste carboxyl nitrile gelatine powder/PVC blend. The blend not only has substantially increased impact strength and elongation at break, but also has a compact microstructure; moreover, the blend has wide application, simple manufacturing process, low cost and less environmental pollution.

The invention discloses toughened polylactic acid capable of being used for rapid forming and a preparation method thereof. The modified polylactic acid is prepared through the method which includes the steps that polylactic acid and a toughening agent are dried respectively and then fully mixed in proportion, and the toughened modified polylactic acid is obtained after melt blending and extrusion. The modified polylactic acid can overcome the defect that polylactic acid is prone to brittle failure, the transparency and tensile strength of polylactic acid are not affected, the process is simple, implementation is easy, and the toughened polylactic acid is suitable for being used as a 3D printing consumable.

The invention discloses an inner spray welding anticorrosive wear resistant oil pipe and a machining method and a machining device. The inner spray welding anticorrosive wear resistant oil pipe comprises a preheating sensing heating ring and a remelting sensing heating ring which are arranged on the outer surface of a pipe body in sequence; a sprayer, a nozzle and supports are arranged in the pipe body, each support is provided with two support rods, the bottoms of the support rods are provided with steel balls capable of freely rolling, and the steel balls are in contact with an inner hole surface of the pipe body; the outer surface of the pipe body is further provided with power idler wheels for pushing the pipe body to rotate and move forwards, the outer end of the pipe body is provided with a spray gun, the spray gun and the sprayer are connected by a powder feeding pipe, a mixed gas pipe and an outer pipe, a cooling water pipe is further arranged in the outer pipe, the outer pipe is filled with cooling water, a cooling water returning pipe is further arranged on the outer pipe, and the spray gun is provided with a hopper, an oxygen pipe, an acetylene pipe and a water inlet. The inner spray welding anticorrosive wear resistant oil pipe is simple in structure, not only the inner surface of an oil pipe but also the end surface and threads of the oil pipe can be subjected to corrosion prevention, a tensile strength of the threads is not affected, the corrosion prevention effect and a connecting strength of a joint are improved, and the corrosion prevention effect is good.

The present invention discloses a partial reinforced particle piston and a manufacturing method thereof. The partial reinforced particle piston comprises a head, a skirt section and a pin base. The head comprises a piston top and a ring slot part. The piston top and the ring slot part are reinforced areas which are formed by distributing reinforced particles in piston matrix material. The skirt section is an non-reinforced area. The reinforced area and the non-reinforced area are combined by an alloy combination form. The partial reinforced particle piston not only increases the wearing resistance of the head of a piston and reduces the thermal expansion coefficient, but also ensures the good mechanical performance of the skirt section of the piston and realizes the continuous transition of the organization structure and performance of the partial reinforced area and the non-reinforced area; the effective power of an engine is improved; the service life of the piston is prolonged; in order to manufacturing the piston, the present invention uses a centrifugal casting method to assemble the reinforced particles in melted homogenous composite material at the head of the piston, and the manufacturing method has simple technology and low manufacturing cost.

The invention discloses a polystyrene modified plastic which comprises the following components in percentage by weight: 70-78% of polystyrene, 7-12% of polycarbonate, 10-12% of inorganic nanoparticle, 0.7-1.5% of coupling agent, 0.7-1.5% of antioxidant, 0.7-1.5% of filler, 0.7-1.5% of lubricant and 0-1% of color master batch, totaling 100%. The polystyrene modified plastic has reasonable formula design. The produced modified polystyrene has the advantages of high impact resistance, favorable heat resistance and frictional resistance.

The invention disclose a bolt torque detector which is used in cooperation with a torque wrench. The bolt torque detector comprises a sleeve and a bolt clamping assembly, the sleeve includes an accommodation cavity with an opening at one end, and can cover a detected bolt; one end of the bolt clamping assembly is arranged in the accommodation cavity, and used to clamp the detected bolt; and the enclosed end of the sleeve is provided with a fixation part, and the fixation part cooperates with the torque wrench. The detector fixes the detected bolt via the bolt clamping assembly, avoids the detected bolt from a welding process, does not influence the original tensile strength of the bolt, ensures the accuracy of a detection result, and effectively solves the problem that the detection result is low in accuracy traditionally due to the fact that the torque of the bolt is damaged.

The high strength and high toughness titanium alloy has Ti as main component, small amount of Al, V and Zr, and impurity not more than 1 wt%. Owing to Zr capable of forming continuous alpha type and beta type solid solution with Ti, the titanium alloy has excellent refined crystal grain structure, high plasticity and high toughness. The titanium alloy has tensile strength of 980-1180 MPa, elongation of 14-25 % and over 50 % higher than that of Ti-6Al-4V alloy, excellent mechanical performance, good machining performance and long service life. It may be applied in producing plate, rod, wire, pipe, etc used in different fields.

The invention relates to the technical field of house building construction, in particular to an installation and construction method of assembly type house building composite slabs. The method includes the following steps of firstly, binding beams and rebars, and temporarily fixing first upper rebars of the beams to first sides of the upper portions of the beams; secondly, hanging second composite slabs on second sides of the upper portions of the beams, wherein the first sides and the second sides are located on the two sides of the beams correspondingly; and thirdly, fixing and binding thetemporarily-fixed first upper rebars after restoration. Since the first upper rebars and the second composite slabs are located on the different sides of the upper portions of the beams, when the second composite slabs are hung, and no position conflict occurs; anchoring rebars of the second composite slabs do not need to be bent, the tensile strength of the anchoring rebars cannot be affected, and meanwhile the after-installation structure quality is ensured; and since the first upper rebars are disposed for temporary fixation, the beams and the rebars are connected into a whole, the beams and the rebars are prevented from damage when the second composite slabs are installed, construction cost is prevented from being increased, and construction efficiency is improved.

The invention discloses a preparation method of a mildew-resistant polyurethane prepolymer. The preparation method comprises the following steps: 1) adding polyether polyol to a reaction vessel, performing vacuum-pumping, controlling the temperature and performing stirring with a stirrer; 2) in the protection of nitrogen, cooling the system, adding diisocyanate and a proper amount of a catalyst, controlling the temperature, and increasing the stirring speed; 4) according the NCO content in the system, slowing adding a silane coupling agent to the reaction system, and continuously performing stirring; 5) adding a certain amount of hydroxyl (or amino) thiophene oligopolymer to the system, and continuously performing stirring; and 6) after the reaction is over, vacuumizing the system to remove bubbles and obtaining a target product. The obtained polyurethane prepolymer is excellent in mildew resistance without mechanical property being affected.

The invention provides an integral female die with a good punching effect, and the integral female die comprises a female die holder and is characterized in that the groove of the die holder is internally provided with at least two first female dies, at least one second female die and at least two female die blocks, wherein the at least two first female dies, the at least one second female die and the at least two female die blocks are arranged side by side, so that the first female dies and the second female die are integrally formed, the second female die is clamped between the two first female dies, two sides of the first female dies and the second female die are fixed by the female die blocks, the tops and bottoms of the first female dies and the second female die are respectively provided with a female die locating block for fixing the positions of the first female dies and the second female die, and the first female dies, the second female die and the female die blocks are pressed by die pressing strips. The integral female die provided by the invention has the advantages of enhancing the tensile strength of steel band products and improving the quality of products.

The stress eliminating process for assembled chain before electroplating includes the following steps: setting assembled chain inside metal basket; tempering the metal basket with chain at 125-150 deg.c for 2 hr; and draining tempering medium. The said stress eliminating process can avoid crack the chain produces during and after electroplating, while making the chain maintaining its tensile strength and being beautiful, durable and superior to chain assembled after electoplating.

The invention discloses peel-off lip gloss without the damage to the lip, and relates to the technical fields of beauty treatment and beauty makeup. The peel-off lip gloss is manufactured from the following raw materials including polyvinyl alcohol, glycerin, tween 80, allantoin, dimethicone, and natural plant pigment. Through the peel-off lip gloss, the problems that dermatitis is caused, for the lip is hurt when a lip gloss membrane formed on the lip is peeled and the lip gloss membrane is difficult to remove cleanly are solved.