2971results about How to "Dimensionally stable" patented technology

A device is formed by a discontinuous process into a bone screw, plate, or fastener, wherein the device has a degree of polymer alignment and strength, and upon reheating above glass transition temperature of the polymer, the device remains dimensionally stable, as it maintains its dimensions, strength, and degree of polymer orientation. In practice of the present invention, the polymer slug is pressed into the die cavity by the actuation of ram press, causing the slug to conform to the die cavity.

The invention discloses a foaming thermoplastic polyurethane bead. The foaming bead comprises 100 parts of thermoplastic polyurethane particles, 1-10 parts of cell size stabilizer, and 1-35 parts of melt viscosity modifier. The bead is prepared through the following steps: steeping the thermoplastic polyurethane particles containing a cell size stabilizer and a melt viscosity modifier in an aqueous suspension and foaming by volatilizing foaming agent. The melt viscosity of the foaming thermoplastic polyurethane bead is 8000-15000 poise below 180 DEG C, the size of the prepared foaming thermoplastic polyurethane bead is stable, the diameter of the cell is uniform, the surface is bright, the yield of the product is high, the foaming thermoplastic polyurethane bead has good sintering property even under lower vapor pressure, and the molding foam product deforms slightly and has low shrinking percentage compared with the size of the die, good dimensional stability and attractive appearance.

The invention relates to a PET glass fiber reinforced composite material, which has the following components based on weight proportion: 100 portions of PET, 10-45 portions of alkali-free glass fibers, 5.0-25 portions of toughener, 0.1-10 portions of crystallization promoter, 0.1-1.0 portion of chain extender, 0.5-5.0 portions of nucleating agent, 0.1-0.5 portion of antioxidant and 0.3-0.5 portion of lubricant. The preparation method is that the components are evenly mixed on a high-speed mixer and melted and blended by a twin-screw extruder to prepare the composite material. The composite material has the advantages of good mobility, high tensile strength and high impact strength, which aims to realize low-cost and high-quality PET engineering plastic scale production to effectively substitute for high-grade plastics and expensive imported special materials.

There is provided a wiring substrate for intermediate connection comprising: (1) a wiring board having a plurality of wiring layers which are connected through a via hole conductor(s) with each other; and (2) a prepreg sheet having a via hole conductor(s) at a predetermined position(s) which sheet is disposed on at least one side of the wiring board.

The invention relates to a low warping high surface gloss glass fiber reinforced polyester composite material and preparation method thereof. The composite material comprises the following components (wt%): 10-35% of polycarbonate, 20-45% of polybutylece terephthalate, 1-10% of flexibilizer, 3-10% of kaolin and 15-38% of glass fiber; 0.1-1% of antioxidant, 0.1-0.5% of ester exchange inhibiting agent and 0.1-3% of processing agent are prepared, silane coupling agent is utilized to process kaolin, then raw materials are placed into a mixing machine to be mixed for 2-5min, then mixture is placed into a screw machine for extrusion granulation, and meanwhile side charging is carried out on the glass fiber, the rotating speed of screw machine is 180-600rpm, and temperature is 240-280 DEG C, thus obtaining the product. The invention can obtain products with high surface gloss, excellent comprehensive mechanical properties and dimensional stability and especially ensures low warping property of product when being produced into injection moulding product.

The invention provides a fiber-reinforced resin-based composite material core. The composite material core is prepared from a fiber-reinforced composite material core in the inner part and an insulating layer on the outer layer, wherein the insulating layer is a glass fiber layer and has the thickness of 0.2-2mm. According to the fiber-reinforced resin-based composite material core, the internal structure is uniform, a layering phenomenon difficultly occurs, the strength is high, the toughness is high, and the cost is reduced.

The invention relates to a composite covered yarn and a manufacturing method thereof and also relates to a high-temperature filter cloth. The composite covered yarn comprises an outer layer of coveredyarn made of short fiber and an inner layer of reinforcing rib made of long fiber, wherein the composite covered yarn is formed by using the covered yarn, made of one or a plurality of types of shortfibers, to cover the reinforcing rib or the metal wire reinforcing rib made of one or a plurality of types of long fibers by thermal cleaning, dipping, drying and sintering. The composite covered yarn manufactured by the method not only saves cost, but also combines the characteristics of high strength of the long fiber and good abrasion resistance and toughness of the short fiber and enhances service life, strength, high-temperature resistance and stability of the composite covered yarn. The composite covered yarn can be made into the filter cloth.

The invention provides a polymer modified asphalt, and the weight of the components comprising as follows :45-55% matrix asphalt, 4 - 8% blend oil, 12 - 14% of SBS ,5-9 % APAO, 2-7% of High-temperature improvement and 15-20% filler. It also offers polymer modified asphalt, which made of waterproof membrane and the railway bridge, highway bridge deck waterproofing project applications. The invention of these waterproofing membrane have a high standard of waterproof function, it can withstand high intensity of railway bridge and particularly high stress dynamic load .It also have excellent performance on water-resistance, high and low temperature resistance, adhesion, crack resistance, fatigue resistance and other aspects .it can be used for railway bridge and the road deck waterproofing works.

The invention relates to a thermoplastic polyurethane modified composite material for FDM (frequency division multiplexing) 3D printing and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 70-95 parts of thermoplastic polyurethane, 1-5 parts of antioxidant, 1-5 parts of hydrolysis-resistant stabilizer, 1-5 parts of compatilizer, 1-5 parts of lubricant and 1-10 parts of other assistant. Compared with the prior art, the antioxidant, hydrolysis-resistant stabilizer, lubricant and other assistants are added, so that the modified composite material has the advantages of favorable mechanical properties, high elasticity, favorable wear resistance, higher heat stability, hydrolysis resistance, higher oxidation resistance and higher processability. When being used for FDM 3D printing, the thermoplastic polyurethane modified composite material has the characteristics of smooth printing process, no odor, smooth printing product surface, beautiful appearance, stable size, low tendency to shrinkage, favorable mechanical properties, high flexibility, high heat stability, high hydrolysis resistance, high oxidation resistance and high processability.

The invention belongs to the field of material engineering and discloses a creep-resistant polypropylene composition and a preparation method and application thereof. The creep-resistant polypropylene composition is prepared from 40-80 percent by weight of polypropylene resin, 5-30 percent by weight of elastomer, 10-40 percent by weight of high-aspect-ratio (HAR) inorganic filler and 0.01-0.5 percent by weight of nucleating agent, wherein the nucleating agent is an alpha-crystal nucleating agent. In the invention, the polypropylene composition modified by the HAR inorganic filler and the alpha-crystal nucleating agent has high creep resistance; and an injection molding piece prepared from the polypropylene composition has stable size and small deformation under practical use conditions, and can fully meet the using requirements of relevant industries such as automobiles, home appliances and the like.

The invention relates to a silastic composition and a manufacturing method thereof. The silastic composition comprises a component A and a component B, the component A is composed of mixing base adhesive and platinum coordination complex, whereas the component B is composed of the mixing base adhesive, hydrogen-containing silicone oil, a thickening agent and a depressor; the mixing mass ratio is: component A: component B is 0.5-99:1-99.5. The silastic composition of the invention is a solid-state mixing silastic containing platinum curing ingredient, so no curing ingredient is needed in the process of molding, besides, the vulcanization effect is good, the vulcanization moulding temperature is low, thus saving electricity, reducing exhaust emission and improving productivity; moreover, the silastic product is odorless and has fine physical and mechanical properties.

The invention discloses a PC/ABS alloy modified engineering plastic dedicated for laptop casings. The plastic comprises the following components in percentage by weight: 22% to 65% of polycarbonate, 1% to 10% of compatilizer, 22% to 65% of acrylonitrile-butadiene-styrene, 5% to 40% of mineral filling material, 0.3% to 1% of antioxidant, 3% to 20% of halogen-free fire retardant, 0.5% to 2% of dispersed lubricant, and 3% to 20% of flexibilizer. The invention also discloses a production method of the PC/ABS alloy modified engineering plastic dedicated for laptop casings. The PC/ABS alloy modified engineering plastic dedicated for laptop casings has the advantages of capability of being recycled and utilized, multi-choice of color and outer layer treatment, stable size, good heat radiation property, and high cost performance. The production method has the advantages of simple operation and suitability for mass production.

A card formed in accordance with the invention includes a first assembly comprised of multiple plastic layers attached via an adhesive to a metal layer. The multiple plastic layers forming the first assembly are laminated under a first selected temperature and pressure conditions to preshrink the multiple plastic layers, stress relieve the first assembly and render the first assembly dimensionally stable. The laminated first assembly is then attached to a metal layer via an adhesive layer to form a second assembly which is then laminated at a temperature below the first selected temperature to form a card which is not subjected to warpage and delamination.

A wood-plastics shuttering board for building engineering is composed of at least two basic wood-plastic ply layers made of the filler (vegetative fibers, glass fibers and plastics) and assistant (calcium carbonate, modifier, coupling agent and lubricant), and at least one lattice material layer between two basic wood-plastic ply layers and with two adhesive layers coated on its both surfaces. Its manufacture technology is also disclosed.

The invention relates to technical wood and a manufacture method thereof. The manufacture method comprises the steps of dying and drying eucalyptus and poplar veneers, conducting gum dipping and thickening on the wood veneers by using an ultrasonic vibration method, assembling gum dipping boards, conducting semi-solidification hot-pressing maintaining by using a curve die high-frequency press, conducting square slicing on the technical wood or cutting the technical wood into wood veneers, assembling the wood veneers in the same direction according to needed thickness, and conducting hot pressing and thickening. The thickness of the technical wood veneers or wood square produced by using the manufacture method is as high as 0.8-1.8kg/cm<3>, the thickness of the technical wood is more than 1.5 times of that of common technical wood, a plurality of items of physical and mechanical properties are improved by more than 1.5 times, the technical wood is not easy to crack, product durability improves to more than one time, service life of products is prolonged, and using fields of the products are extended.

The invention provides a film-coating production technology for nano zinc oxide and belongs to the technical field of fine petrochemicals and chemicals. The technological process is that an alkali carbonic acid zinc film is coated uniformly on the surfaces of light calcium carbonate and inner pores thereof, subjected to decentralized processing, and then calcined and activated in a dynamic calcination furnace at the temperature of 400 to 500 DEG C, so as to prepare the nano zinc oxide. The nano zinc oxide prepared through the technology belongs to a low-zinc product (containing 24 to 30 percent zinc), has the advantages of stable nano size, stable nano material properties, completely developed crystal grains, small particle diameter, uniformity in distribution, low reunion degree, high activity and good dispersivity, and can be widely applied to rubber, tires, catalysis, magnetism, optics, electricity, chemistry, physics, biology and the like.

Flooring that utilizes sophisticated, self-stabilizing, woven face fabric using relatively heavy "carpet weight" nylon, polyester, PTT or other yarns on modern Jacquard computer controlled looms to produce flat-weave fabrics that are bonded to engineered backing structures. Urethane modified bitumen may be used as a backing layer, and an optional latex precoat may be used on the fabric layer, together with an optional antimicrobial in the precoat.

The present invention discloses a processing method of flexible cotton knitted face fabric. Said processing method includes the following several steps: weaving, enzymatic washing, kiering and bleaching, dyeing, oversoftening, dewatering, opening, drying, sizing and pre-shrinking.

The invention relates to flame-retardant synthetic paper. The flame-retardant synthetic paper comprises polypropylene resin, polyethylene resin, an inorganic filler, a coupling agent, an antistatic agent, a lubricant and a coloring agent. The flame-retardant synthetic paper is characterized in that the flame-retardant synthetic paper further comprises a flame retardant. Raw materials and the partsby weight thereof are as follows: 100PHR of polypropylene resin, 20-90PHR of polyethylene resin, 50-300PHR of inorganic filler, 1-8PHR of coupling agent, 1-5PHR of antistatic agent, 0.5-5PHR of lubricant, 5-20PHR of coloring agent and 5-35PHR of flame retardant. Blending, mixing, rubberizing, molding by a calendar, leading out by a leading roller, embossing, cooling, corona treatment and windingare carried out on all the raw materials of the flame-retardant synthetic paper for preparing a product. The flame-retardant synthetic paper has the flame-retardant function and is difficult to burn.Even the flame-retardant synthetic paper is incinerated in a high-temperature incinerator, the flame-retardant synthetic paper can not produce harmful gas, not cause secondary pollution to society andhuman beings and be in line with the requirements of environmental protection.

The invention provides a composition for preparing polymer dispersed liquid crystal. The composition comprises polymerization monomer and light initiator; the polymerization monomer is at least one of acrylic ester, methacrylic acid ester, acrylic acid and methacrylic acid compounds or the mixture of at least one of the acrylic ester, the methacrylic acid ester, the acrylic acid and the methacrylic acid compounds and an unpolymerized composition containing hydrosulfide group, wherein the composition also comprises an acrylic acid triazine compound congaing crosslinking agent. The invention also provides a liquid crystal containing composition for preparing the polymer dispersed liquid crystal; moreover, the invention also provides polymer dispersed liquid crystal (PDLC) and a PDLC membrane prepared from the composition of the invention and a method for preparing the PDLC membrane. The PDLC membrane prepared from the composition of the invention has higher contrast, lower driving voltage and good thermal stability.

The invention discloses a high-strength biodegradable polycaprolactone 3D printing material which comprises the following components in parts by weight: 70-90 parts of polycaprolactone, 1-5 parts of a crosslinking agent, 2-10 parts of an inorganic filler, 0.5-1.5 parts of an inorganic filler dispersing wetting auxiliary agent, 0.5-1 part of a stabilizer, 0.1-0.5 part of a degassing agent, and 1-2 parts of a leveling agent. With targeted selection of the inorganic components for modification treatment on polycaprolactone, the polycaprolactone modified material exerts excellent impact-resistance strength and creeping resistance. The material allows the degradable 3D printing material to exert better mechanical properties while broadening the 3D printing material type.

A tibia implant for tightening the patella tendons, has a vertical cross section which in mounted position tapers downward, an essentially vertically arranged base plate which carries a sponge structure, wherein the sponge structure on both sides rests against a respective vertical cut surface of a vertical knee proximal incision of the tibia.