31results about How to "Address Dimensional Stability Issues" patented technology

The invention discloses cotton fiber, aloe fiber and viscose fiber blended yarn and a yarn spinning process thereof. The blended yarn comprises the components by fiber-content blended ratio: 50 percent of cotton fiber, 30 percent of aloe fiber and 20 percent of viscose fiber, and the fibers are spun into the yarn through a blending process. The aloe fiber and the viscose fiber are subjected to coating mixing, and card slivers formed through working procedures such as blowing and cotton carding and cotton-fiber fine combing slivers are subjected to sliver mixing to form the yarn. A compact Siro spinning technique and the reasonable raw material collocation are adopted, so that the problems that the fiber of the aloe fiber is short, the viscose fiber is easy to deform, the elastic recovery properties are poor, the abrasive resistance is poorer, the fiber is not resistant to acid and the like are solved, and the advantages of the aloe fiber, the viscose fiber and the cotton fiber are exerted. A mixing mode of one pre-drawing and three mixing-drawing is adopted, the accurate blending ratio is favored, and the components are uniform. The produced single yarn evenness is uniform, the single yarn strength is high, the neps are less, and the yarn defects are less.

The invention discloses a method for assembling a zinc oxide nano-chain by using DNA as a template, comprising the following steps of: (1) mixing and stirring an aqueous solution of DNA, an aqueous solution of zinc nitrate and an aqueous solution of hexamethylenetetramine; (2) heating to 60 DEG C-80 DEG C and keeping the temperature for 0.5-4h; and (3) reducing the temperature to room temperature of 20 DEG C-25 DEG C and carrying out ultrasound treatment in an ultrasound wave dispersion instrument for 10-20 minutes and sampling to obtain the zinc oxide nano-chain by using the DNA as the template. The method is simple, easily obtains raw materials, consumes less energy and reduces the pollution to the environment; the equipment is less and the cost is low, so the method is suitable for batch production; the reaction time is short, the yield is high and no toxicity and harm exist, so that the method provides the possibility for preparing the zinc oxide nano-chain on a large scale; and zinc oxide nano-chains with different shapes can be constructed by operating the space structure of biological macromolecule DNA. The invention can simultaneously solve the problems of the control of the size and the shape of nanometer materials and the dispersion stability.

The invention discloses an organosilicon surfactant used for high-resilience foam and a preparation method of the organosilicon surfactant, belongs to the technical field of surfactants, and solves the problem of compatibility of a polyurethane high-resilience foam system and surface and dimensional stability of polyurethane foam in the prior art. According to the method provided by the invention,two hydrogen-containing silicone oil having different structures is designed, the hydrogen-containing silicone oil and allyl polyether having different molecular weights are separately subjected to areaction to obtain two polyether-modified silicone surfactants with different structures, a ratio of different components is regulated and controlled to realize balance of openness and stability of the high-resilience foam, so that special requirements of a volume, aeration, shear and surface and dimensional stability of the high-resilience polyurethane foam are met, and the problems of system compatibility and surface and dimensional stability of the polyurethane foam are effectively solved.

The invention discloses a natural wood dyeing method and a natural wood dyeing dye. According to the present invention, the dyeing solution of the present invention and tannin contained in wood are subjected to a chemical reaction, such that the dyed color is natural, the texture are clear, and the penetration depth of the color is 1.0-2.0 mm; the oxidation color of the dyed wood has advantages ofdelayed fading, beautiful outlook and applicability; and with the method and the dye, the technical problems of poor physical properties such as coloring, dyeing uniformity, dimensional stability, hardness and the like of the wood dyeing in the prior art can be solved, and the upgrading of the low-grade wood is promoted.

The invention relates to a nylon 66 composite material, especially to a glass fiber reinforced nylon 66 composite material for a panel of a dish-washing machine and a preparation method thereof. The material is composed of, by weight, 66.8 to 76.9% of nylon 66 resin, 10 to 15% of flat short cut glass fiber, 10 to 15% of cullet fiber, 0.5 to 0.8% of a nylon anti-hydrolysis agent, 0.3 to 0.6% of an anti-oxidant, 0.2 to 1.5% of a lubricant and 0.1 to 0.2% of a nucleating agent. According to the invention, through combined action of a variety of functional auxiliary agents, the special cullet fiber and the flat short cut glass fiber and adoption of special twin-screw extrusion technology, the problems of surface warping and surface floating fibers of the glass fiber reinforced nylon 66 composite material and problems in adhesion between a product and glass cement are overcome, and dimensional stability and mechanical property stability of the glass fiber reinforced nylon 66 composite material in a high-temperature humid environment are guaranteed.

The invention relates to a tool box and a preparation method thereof, and particularly relates to a hollow blow-molded micro-foamed tool box and a preparation method of the tool box. The material related to the invention comprises the following components in parts by weight: 60-90 parts of co-polypropylene, 5-30 parts of melt-blown polypropylene, 0-20 parts of a filler, 1-20 parts of a modifier, 0.5-12 parts of a foaming agent, 1-10 parts of a foaming auxiliary agent, 0.5-2 parts of a lubricant, 0.2-1 part of an antioxidant and 0.2-1 part of a light stabilizer. The invention discloses the preparation method of the hollow blow-molded micro-foamed tool box. According to the invention, the tool box with a fine micropore structure is obtained. The anti-sagging property and the transverse stretching performance of the polypropylene melt in a blow-molding and micro-foaming process are effectively improved, the requirements of free regulation of wall thickness distribution of the product is met, the smooth operation of the polypropylene hollow blow-molding micro-foaming process is ensured, and the product has a significant characteristic of light weight. The tool box provided by the invention also has excellent dimensional stability, anti-dropping performance and anti-shocking performance. The preparation method provided by the invention has the advantages of shorter forming period, low manufacturing cost, high product qualification rate and easy realization of industrialization.

The invention discloses a method for producing an aloe cotton blended fabric. The method includes the following steps: a spooling process, a beam-warping process, a slashing process, a drafting process, a weaving process, and a finishing process. The aloe cotton blended fabric has excellent fluffy and soft performance and suitable elasticity; the problem of crease and size stability of pure cotton fabrics can be solved; the wearing comfort level and the warming performance can be improved further; underclothes such as underwear, vests, undershirts, shorts, T-shirts and pajamas which are made of the aloe cotton blended fabric can protect skins and heath. The warp tensile failure strength of the aloe cotton blended fabric is 267.4N, the weft tensile failure strength of the aloe cotton blended fabric is 225.6N, the warp tearing strength of the aloe cotton blended fabric is 13.3N, and the weft tearing strength of the aloe cotton blended fabric is 10.5N.

The invention discloses a rotary hearth furnace hearth structure. The rotary hearth furnace hearth structure which is a multilayer structure sequentially comprises, top to down, a carbon composite material layer which contains 8-45% of graphite and 92-54% of fused magnesia magnesium oxide, a carbon composite material layer which contains 8-45% of graphite and 92-54% of fused magnesia magnesium oxide, a mullite firebrick layer, a high-alumina brick layer, and a light-weight thermal-insulation brick layer. So the comprehensive hearth has a special slag erosion resistance and a metal and liquid slag adhesion resistance, and the dimension stability problem of expend with heat and contract with cold of the hearth is solved.

The invention relates to a camera body structure for a temperature adaptive space remote-sensing camera. The structure comprises a primary mirror, a secondary mirror, three mirrors, a front frame, a bearing cylinder and a rear frame, wherein the bearing cylinder consists of n sections of carbon fiber composite materials with different hot line expansion coefficients. The overall equivalent hot line expansion coefficients of the bearing cylinder are changed, and the hot line expansion coefficients of the primary mirror, the secondary mirror, the front frame, the bearing cylinder and the rear frame are reasonably designed, so that the position variation between the primary mirror and the secondary mirror is always 0 regardless of the temperature change. By the camera body structure, the problem that the temperature adaptive space remote-sensing camera is low in dimensional stability in the spatial thermal environment is effectively solved, so that the camera has a wide temperature adaptation range, the related requirements on thermal control are reduced, and the reliability of a remote-sensing camera system is improved.

The invention relates to a hydraulically driven mechanical power molding machine. The hydraulically driven mechanical power molding machine comprises a machine body, an upper limiting oil cylinder, alead screw adjusting structure, a lower oil cylinder structure, a feed mechanism and a formwork assembly. The machine body is a frame machine body. The upper limiting oil cylinder, the lead screw adjusting structure, the formwork assembly and the lower oil cylinder structure are sequentially arranged on the middle of the machine body from top to bottom. The feed mechanism is arranged on one side of the machine body. The upper limiting oil cylinder is connected to the lead screw adjusting structure. The lower end of the lead screw adjusting structure is connected to the formwork assembly. The lower end of the formwork assembly is connected to the lower oil cylinder structure. The hydraulically driven mechanical power molding machine has the characteristics of simple structure, reliable operation, high automation, and convenient mould installation. The hydraulically driven mechanical power molding machine further has advantages of high efficiency, high powder loading, stable product compression and the like. Quickly pressing powder metallurgy parts at a lower cost in the powder metallurgy industry of China becomes possible.

The invention discloses a geothermal floor base material manufactured in an irradiation manner and a processing method thereof. The method includes the following steps of baking wood, placing the wood in a closed tank, vacuumizing the closed tank, steeping the wood in a pressurizing manner, reducing pressure to remove surface liquid, taking the wood out, then irradiating the wood with electronic beams and curing the wood to obtain a product. Less time is consumed, cost is low, various properties of the wood can be improved effectively, and the method is a very economical fast-growing wood modifying method. Organic preparation steeping and electronic beam irradiating are utilized to improve the properties of the fast-growing high-yield wood. The method can improve various mechanical properties of the fast-growing wood remarkably. Moreover, price is low, investment is small, operation time is short and additional toxicity is avoided.

The invention discloses a preparation method of a terylene light-shielding flame-retardant coated fabric. The preparation method is carried out according to the following flow of: fabric pre-shrinking, fabric padding pretreatment agent drying, base coating drying, light-shielding layer coating drying and surface color coating drying, wherein in the fabric pre-shrinking process, a pre-shrinking setting speed is reduced to 20m/min from 40m/min, a pre-shrinking temperature is risen to 200 DEG C from 150 DEG C, and an effective width of 150cm of a base fabric before pre-shrinking is reduced to aneffective width of 146cm after pre-shrinking; an assistant water-soluble flame-retardant pretreatment agent is selected to carry out padding on the fabric, coating agents are compositely coated and scraped on the base fabric, the coating agents sequentially comprise three coating agents of a PA emulsion, a flame retardant and silver colloid, and finally, the fabric enters a drying oven in a completely relax state to be set. Proper environmental-friendly glue is selected, so that the problem of environmental protection is solved. The pre-shrinking setting speed and the pre-shrinking temperaturein the fabric pre-shrinking process are controlled, so that problems of size stability and seam slippage are solved, shrinkage control is smaller than 1%, and seam slippage is smaller than 2%.