392results about How to "Guaranteed physical properties" patented technology

The present invention discloses a production process for an ultra high tenacity polyester industrial filament. The production process adopts a one-step method of spinning and stretching, and the method comprises the solid state tackifying, the melt spinning, the high temperature stretching, the heat setting, and the winding forming. The present invention adopts the innovative five-pair hot roll stretching heat setting process, compared with the traditional four-pair hot roll stretching heat setting, the the present invention adopts two-stage heat stretching, the processing method of the two-stage heat setting effectively reduces the stretching speed of fiber, and prolongs the heat setting time of the fiber, so that the fiber has an even stable orientation structure while the physical performance of products is ensured, the spinning condition is optimized. The ultra high tenacity polyester industrial filament prepared by utilizing the method of the present invention has the advantages that the intensity is high, the stretching and the dry heat shrinkage are reasonable, the heat resistant performance is good, and the impact resistant performance and the fatigue resistant performance are good.

The invention relates to a preparation method of a halogen-free flame-retardant polyurethane (PU) sealant. The preparation method comprises the following steps: dewatering and drying the following materials, namely a filler, a thixotropic agent, a halogen-free flame retardant, a flame-retardant synergist, a plasticizer, a light stabilizer and an antioxidant in vacuum; stirring a PU prepolymer and the materials for dispersion in a double planet mixer with a high-speed dispersion disk or a tri-roller grinder at the temperature of 30-50 DEG C for 2-5 hours under the condition that the vacuum degree is not less than 0.092Mpa; under normal pressure and protection of high-purity nitrogen, adding a catalyst A, a silane adhesion promoter and a water scavenger, and stirring for 0.1-1 hour for dispersion; and removing small molecules and stirring for 0.3-1 hour under the condition that the vacuum degree is not less than 0.092Mpa to finally obtain the halogen-free flame-retardant PU sealant. The halogen-free flame-retardant PU sealant effectively overcomes the disadvantages of the PU sealant such as big flame, fast burning speed, severe drippage and the like in the prior art on the premise of ensuring the original physical properties of the PU sealant, thus the PU sealant has the advantages of flame retardance, no drippage during the burning process, good adhesive property and the like.

The present invention relates to a glass fiber reinforced flame retardant polypropylene material for household appliance products, and belongs to the field of modified polypropylene plastic. The material comprises the following raw materials, by weight: a high-impact-resistance copolymer polypropylene resin, a bromine-based flame retardant agent, antimony trioxide, a flame retardant synergist, alkali-free continuous long glass fibers, a compatibility agent, a toughening agent, a lubricant, a UV absorber and an antioxidant. The present invention provides the glass fiber reinforced flame retardant polypropylene material with higher tensile strength, bending modulus and hardness as well as high impact-resistance, low molding shrinkage, aging resistance and the like. The glass fiber reinforced flame retardant polypropylene material has a high heat deformation temperature, good oxidation resistance at high temperature, and the flame retardant performance up to the level of UL94 V-2, and passes the glow wire test of GWIT: 700/3.0. The glass fiber reinforced flame retardant polypropylene material has a low cost and a light weight, and can be used instead of metal or plastic material to produce the household appliance products which need flame retardation and high temperature resistance.

The invention provides a health-care spandex fiber which is formed by combining a wrapper and a core part, wherein the section of the fiber is solid; the mass percentage of the core part accounts for 30-70% of that of the fiber and the mass percentage of the wrapper accounts for 30-70% of that of the fiber; and a preparation method of the health-care spandex fiber comprises the following steps of: 1, preparing a health-care spandex core part by utilizing a melt spinning technology according to a formula proportion; 2, preparing a health-care spandex fiber wrapper by utilizing a dry-method spinning technology according to the proportion; and 3, spinning by utilizing a special spinneret plate combined piece through a conventional dry-method spinning equipment process so as to obtain a health-care spandex. The health-care spandex disclosed by the invention has the effects of eliminating the peculiar smell, absorbing the moisture and proofing moulds, and inhibiting bacteria and expelling parasites; the health-care spandex can be contacted with a human body to remove the humidity and absorb the sweat so as to accelerate the blood circulation and the metabolism of the human body and relieve fatigues; and the health-care spandex also has the aroma of plant essences, and furthermore is good in utilization performance and can meet the requirements on homespun in processes of spinning, weaving, dyeing and finishing.

The invention discloses a low-gloss polypropylene composite material which is prepared from the following raw materials by weight percent: 45-99% of polypropylene, 0-42% of inorganic filling material, 0-10% of flexibilizer POE (polyolefin elastomer), 0.5-4% of organic delustering agent, 0.1-2% of antioxidant and 0-3% of other additives. The preparation method comprises the following steps: weighing the raw materials in proportion; mixing polypropylene, the inorganic filling material, the flexibilizer, the organic delustering agent, the antioxidant, a light stabilizing agent and the other additives in a high-speed stirrer; putting the obtained mixture in a two-screw extruder for melt extrusion; and after extrusion, cooling, drying and grain-sized dicing to obtain a finished product. According to the invention, a method of adding a proper amount of styrene-acrylonitrile crosslinking copolymer into polypropylene is adopted, thus the prepared polypropylene composite material has the characteristic of low gloss, and simultaneously the polypropylene composite material basically has original physical property. The low-gloss polypropylene composite material disclosed by the invention is suitable for being applied to inner decorative materials for home appliances, automobiles and the like.

The invention discloses a preparation method of baking-free high-strength fly ash ceramsite. The preparation method comprises four stages of preparation of a mixed alkaline excitant, uniform mixing ofthe excitant and raw materials, balling by a balling disc, and maintenance and molding, wherein the mixed alkaline excitant is prepared by mixing and crushing dried desulfurized gypsum, fly ash and quick lime according to a certain ratio. The baking-free high-strength fly ash ceramsite has the advantages of low construction cost, convenience in preparation, simple process, light weight, high strength and the like, and can replace part of sandstone to prepare lightweight aggregate concrete and produce prefabricated parts; the fly ash is used as a main raw material, cement, quicklime and desulfurizing gypsum are a mixed alkaline activator and a curing agent, and sodium silicate is a binder; the comprehensive utilization approach of industrial solid waste fly ash and industrial by-product gypsum is expanded while unfired high-strength fly ash ceramsite is prepared, and the concept of the green circular economy and the sustainable development of a building material is enhanced.

The invention relates to a preparation process of a dual-metal engine cylinder composite material, the preparation process comprises the following steps of: firstly, acid-washing a HT250 cast iron cylinder liner and carrying out surface degreasing and derusting treatment on the HT250 cast iron cylinder liner; then dipping the HT250 cast iron cylinder liner into a prepared proportional saline solution, so that the surface of the HT250 cast iron cylinder liner is soaked in the saline solution; then drying the HT250 cast iron cylinder liner, and putting the HT250 cast iron cylinder liner in a ZL101A aluminum alloy melt body for hot immersion plating; fixing the immersion-plated HT250 cast iron cylinder liner in a mold cavity of a metal mold casting mold, casting, melting and cooling a ZL101A aluminum alloy, wherein concentration of the saline solution is 100-200g/L, the saline solution is prepared by mixing water together with potassium fluoride KF, potassium chloride KCl, sodium chloride NaCl, calcium fluoride CaF2, and calcium chloride CaC12 according to a mass ratio of 39-46:16-26:15-21:6-15:5-10. According to the preparation process, the engine cylinder composite material is obtained through treating the ZL101A aluminum alloy and HT250 cast iron by a self-prepared surfactant and implementing a dual-metal composite casting process on the ZL101A aluminum alloy and the HT250 cast iron, wherein two metal materials of the ZL101A aluminum alloy and the HT250 cast iron are not mixed and kept with original physical properties; but the ZL101A aluminum alloy and the HT250 cast iron obtain an extremely perfect combination interface, so that casting metallurgical bonding of 99.5 percent and above is achieved.

The invention provides a high-accuracy TA18 titanium alloy pipe preparation method comprising the steps of preparing material, melting, putting a titanium alloy ingot into a resistance furnace to heat until temperature reaches up to 850 DEG C to 900 DEG C, forming a titanium alloy sheared billet after preserving heat for one to three hours and mounding and drawing for several times, rolling a titanium alloy pipe blank, rolling roughly, rolling precisely, and annealing. A titanium alloy pipe produced by utilizing the high-accuracy TA18 titanium alloy pipe preparation method is high in finished product rate, low in production cost, good in fineness which can reach h6, reasonable in crystal structure, and pretty high in practical value.

The invention discloses a hydraulic control mechanism for vanes. The hydraulic control mechanism for the vanes solves the problem that vanes can still extend to the outside of a rotor when the existing common vane pump does not work, so that the energy consumption of the vane pump is large. The vane pump structurally comprises a shell, a stator and a rotor, wherein the rotor is arranged in the stator in a rotatable mode, a plurality of vane grooves are radially arranged in the rotor, the vane grooves are internally provided with the vanes in a sliding way, and the vanes can partially extend out of the radial outside of the rotor, or retract into the rotor. A cavity is formed between the rotor and the stator, and is provided with a fluid suction zone, a fluid compression zone and a vane retraction zone, the shell is internally provided with a chamber communicated with the cavity, and the chamber is communicated with the outside through a fluid inlet and a fluid outlet. When the rotor is required to idle, pressure fluid is introduced into the chamber so as to enable the vanes to stably retract into the rotor.

The invention provides a processing process of a lemon jelly dried sugar curing tablets. The process comprises the following steps of: cleaning separated fresh lemons, washing, disinfecting, airing, dewatering, freezing, slicing, vacuum freezing and drying, dipping molasses and drying to prepare a lemon jelly dried sugar curing tablets. The processed tablets has the advantages of high quality, good mouthfeel, convenient storage, convenient use and great commercial value.

The invention discloses a battery module with same-side electrode output, which comprises a plurality of square batteries arranged in sequence, and the positive electrodes and the negative electrodesof the batteries are positioned at the top and are respectively arranged at two sides of the central axis of the arrangement direction of the batteries. Along the arrangement direction of the batteries, the positive and negative electrodes of the first battery and the second battery are arranged on different sides, and then the positions of the positive and negative electrodes of every two batteries are changed. The positive electrode of the first battery is connected with the positive output electrode of the battery module, and the negative electrode of the second battery is connected with the negative output electrode of the battery module; the negative electrode of the first battery is connected to the positive electrode of the third battery, and the positive electrode of the second battery is connected to the negative electrode of the fourth battery, and so on. The bus connection mode of the series batteries in the battery module can reserve enough space for the monitoring circuitboard, and when the module package is formed, the low-voltage line connected with the monitoring circuit can be separated from the bus high-voltage wiring harness connected with the positive electrodeand the negative electrode of the battery module, so that the electromagnetic interference of the bus to the low-voltage line is greatly reduced.

The invention belongs to the technical field of plastic coloring, and discloses high-lightness and high-brightness black masterbatch and a preparation method thereof. The high-lightness and high-brightness black masterbatch comprises components in percentage by weight as follows: 40%-45% of carbon black, 48%-55% of carrier resin, 4%-10% of hyperdispersant and 0.5%-2% of a high-temperature stabilizing agent. The preparation method comprises steps as follows: the carbon black, the carrier resin, the hyperdispersant and the high-temperature stabilizing agent are prepared according to content of a formula, the components of raw materials are totally put in a low-speed mixer for pre-mixing treatment, and then the obtained mixture is transferred to a pressurizing mixer for pressurizing mixing; materials obtained through pressurizing mixing are sliced and placed in a double-roll extruding machine for extrusion forming; materials obtained through extrusion are broken and transferred into a spiral granulator for granulation; and obtained materials are cooled, dried and sub-packaged to obtain the high-lightness and high-brightness black masterbatch. The high-lightness and high-brightness black masterbatch has high carbon black content, high blackness degree and good dispersity.

The invention provides a rolling level thermoplastic polyurethane elastomer and a preparation method thereof. The thermoplastic polyurethane elastomer is mainly prepared of the following components in parts by weight: polymeric glycol, isocyanate mixture, diethylene glycol, nano SiO2 modified polypropylene and hydroxyethyl acrylate, wherein the polymeric glycol is a polytetramethylene glycol and adipic acid 1,4-butyl glycol ether glycol mixture; the isocyanate mixture is a toluene diisocynate and hexamethylene diisocyanate mixture. Under the synergistic effect of polytetramethylene glycol and adipic acid 1,4-butyl glycol ether glycol and the synergistic effect of toluene diisocynate and hexamethylene diisocyanate, the prepared rolling level thermoplastic polyurethane elastomer is high in processing performance and resilience performance due to nano SiO2 modified polypropylene and hydroxyethyl acrylate serving as a crosslinking agent; meanwhile, the phenomenon of roll bonding can be avoided in a working process.

The invention belongs to the technical field of inorganic hybridized polymer materials and particularly relates to inorganic hybridized mixed-etherified melamine resin and a preparation method thereof. The preparation method mainly includes steps: (1) etherification reaction, to be more specific, adding hexamethylol melamine, methyl alcohol and butyl alcohol into a reactor, and performing thermal reaction to obtain tetra-etherified or penta-etherified melamine resin; (2) alkali neutralization; (3) hybridization reaction; (4) distillation for removing residual methyl alcohol and butyl alcohol; (5) cooling and filtering to obtain a finished product. The inorganic hybridized mixed-etherified melamine resin prepared according to the method has advantages that by hybridization cross-linking reaction with inorganic hybrid compounds, high-temperature flame-retardant elements such as boron, molybdenum and stibium are added into amino resin generated finally, and accordingly high temperature resistance and flame retardation of the amino resin are improved, and the resin is mainly applied to preparation of combined polyether and paint.

The invention discloses a remediation method for heavy-metal-contaminated soil and relates to the field of ecological environment remediation. The method comprises the steps that ragweed is planted on the heavy-metal-contaminated barren land; and the ragweed is reaped, transferred, incinerated and subjected to heavy metal extraction sequentially in the period before the start of the flowering period of the ragweed. According to the remediation method, the heavy-metal-contaminated soil is remedied through the ragweed, the ragweed grows fast in the growing period and branching period, and the ragweed has the high absorption function and enrichment function on the heavy metal pollution in the soil; and the ragweed has the beneficial effects of being high in growth speed, large in biomass, high in adaptability, low in cost, wide in distribution and the like, a lot of lead, cadmium and the like in the soil, especially in the overground part, can be transferred into the plants, the ragweed is reaped and transferred manually before the flowering period and is incinerated, then heavy metals are extracted, and therefore the soil pollution such as lead and cadmium is remedied, and the higher economic value and economical environment value are provided for the effective utilization of heavy metal soil remediation by the plants and invasive alien species.

The invention belongs to the technical field of inorganic hybrid polymeric materials, and especially relates to an inorganic hybrid butylated melamine resin and a production method thereof. The production method mainly comprises the following steps: 1, carrying out an etherification reaction: adding hexamethylolmelamine and butanol to a reaction kettle, and carrying out a heat insulation reaction to obtain tetraetherified or pentaetherified melamine resin; 2, neutralizing with an alkali; 3, carrying out a hybrid reaction; 4, distilling to remove residual butanol; and 5, cooling and filtering to obtain the finished product. A hybrid cross-linking reaction with an inorganic hybrid compound makes boron, molybdenum, antimony and other high temperature-resistant flame retardation elements be introduced to finally generate amino resin, so the high temperature resistance and the flame retardation performance of the amino resin are improved, and the obtained amino resin is mainly used to prepare combined polyether, paints and coatings.