68results about How to "Strong shrinkage" patented technology

The invention provides a conductive graphene printing ink. The conductive graphene printing ink is composed of 0.001-80wt% of graphene, 1-60wt% of a linking material, 0.1-30wt% of an assistant, and the balance solvent. The invention also provides a preparation method of the conductive graphene printing ink. The conductive graphene printing ink has the advantages of good toughness, good die molding performance, good adhesion and good impact resistance; chemically doped graphene and chemically modified graphene in the graphene have good conductive, mechanical and thermal performances. The molecules of the chemically doped graphene comprise one or more of polyaniline, polyacetylene, polythiophene, polyparaphenylene and polypyrrole, and the functional groups of the chemically modified graphene comprise one or more of an anilino group, a pyrryl group, an imidazolyl group, a benzenesulfonic acid group, a thienyl group, a furyl group, a phenyl group, a hydroxy group, an ester group and derivative groups thereof, so the conductive performance, the mechanical performances and the dispersion stability of graphene in the printing ink are improved.

The invention relates to a casting production technology of a valve body. The production technology comprises the following steps in turn: preparing a mould, preparing a sand mould, performing core setting, smelting, pouring and performing subsequent operations, wherein the preparation of the sand mould comprises the following steps: firstly filling moulding sands in the mould, secondly ramming moulding sands to complete modeling and installing a charging hole on the completed model; smelting comprises the following steps: firstly selecting material according to the demand of the casting, secondly adding alloy element in molten iron and thirdly performing inoculation when molten iron is discharged; and pouring comprises the following steps: firstly injecting molten iron in an impression, wherein the pouring temperature is 1380-1440 DEG C and the pouring time is 8-20 seconds; and secondly keeping temperature for 40-80 minutes, wherein the production yield is 40%-60%. The casting production technology of the invention has better pouring quality, the density of the casting is uniform; and the sand mould is not easy to crack and has wider application range.

The invention relates to the field of cryoablation, in particular to a cryoablation catheter with a mapping function. The cryoablation catheter comprises a far-end tube, an ablation balloon and a mapping balloon, wherein the far-end tube is a far-end section of the catheter; the ablation balloon is mounted at the end of the far-end tube and used for cryoablation; and the mapping balloon is locatedat the front end of the ablation balloon and has expansion and contraction functions, and a plurality of mapping electrodes are arranged on the surface of the mapping balloon. The invention aims to provide the cryoablation catheter which can improve the mapping effect of cryoballoon ablation for atrium diseases.

The invention discloses a coextrusion-lamination obstructing packaging film and belongs to the technical field of packaging materials. According to the coextrusion-lamination obstructing packaging film, the problems that an intermediate layer of an existing coextrusion film is relatively high in water absorption, the permeability resistance of barrier layers is reduced, the effective expiration date of a product is short, and meanwhile, due to structure arrangement of the intermediate layer PA of the coextrusion film and the single barrier layers at two sides of the intermediate layer, high barrier property and high coextrusion malleability property of the packaging film can not be simultaneously realized are solved. The packaging film comprises a BOPET (biaxially-oriented polyethylene terephthalate) film, an APET shading film, a first PE polyethylene film, a first PET polyester film, a first EVOH barrier layer, a PVDC gas barrier film, a second EVOH barrier layer, a second PET polyester film and a second PE polyethylene film, wherein the BOPET film, the APET shading film, the first PE polyethylene film, the first PET polyester film, the first EVOH barrier layer, the PVDC gas barrier film, the second EVOH barrier layer, the second PET polyester film and the second PE polyethylene film are co-extruded and compounded from outside to inside to form the packaging film. The packaging film disclosed by the invention is especially suitable for packaging fresh seafood, beef and dried tofu.

The invention discloses an aluminum silicate composite heat-insulating coating for walls, which comprises the following raw materials in percentage by mass: 2 to 3 percent of redispersed latex powder, 13 to 19 percent of aluminum silicate fiber, 1 to 2 percent of cellulose, 0.25 to 0.35 percent of wood fiber, 0.4 to 0.7 percent of polypropylene fiber, 13 to 16 percent of fly ash, 5.5 to 6.4 percent of quartz powder, 16 to 21 percent of closed cell heat-insulating particles, and the balance of cement. The aluminum silicate composite heat-insulating coating for the walls has the advantages of no toxicity or harm, high thermal insulation property, sound absorption performance, water resistance, frost resistance and high-temperature resistance, low shrinkage, no seam in general, avoidance of cold bridge or heat bridge, high cracking resistance, shock resistance and negative wind pressure resistance and light volume weight; the raw materials have high workability, water retentivity and adhesion and difficult hollowness, can be firmly adhered to various geometrical surfaces and are particularly suitable for construction of various special surfaces; during the construction, the coating does not drop or sag, is convenient to construct and has low loss; and the coating is A-grade and non-combustible, and cannot generate harmful gas at a high temperature.

The invention provides three-dimensional gorgeous paint as well as a preparation method and a construction process thereof. The three-dimensional gorgeous paint comprises the following components in parts by weight: 200-500 parts of water, 0.1-5 parts of a wetting agent, 0.1-4 parts of a preservative, 0.1-5 parts of a defoaming agent, 5-30 parts of propanediol, 10-50 parts of a film forming aid, 0.1-4 parts of a pH value regulating agent, 200-500 parts of a pure acrylic emulsion, 1-30 parts of a thickening agent and 100-400 parts of colored solid dry particles. The preparation method comprises the steps of after uniformly dispersing water, the wetting agent, the preservative, the defoaming agent, propanediol, the film forming aid, the pH value regulating agent and the pure acrylic emulsion, adding the thickening agent, uniformly stirring, adding the colored solid dry particles, and uniformly mixing to obtain the three-dimensional gorgeous paint. The three-dimensional gorgeous paint has the beneficial effects that the raw materials are wide in sources, easily and conveniently available and relatively low in cost; furthermore, the preparation process is simple, the product system is stable, the construction is easy and convenient, and the limits that existing colored paint is tedious in colour modulation, complex in production process and high in construction requirement are thoroughly changed.

The invention discloses a dressing device for bile leakage of abdominal incision infection split and merging. The device comprises a suction tube, a drainage tube, a washing pipe, a lavage tube and a liquid collection bottle; the suction tube, the drainage tube and the washing pipe are communicated by a three-way connector; a liquid outlet end of the drainage tube extends into the liquid collection bottle which is connected with central negative pressure by a connecting pipe; the outside of a pipe wall of a liquid inlet end of the suction tube is wrapped with sponge, and the pipe wall arranged in the sponge is provided with a plurality of through holes; a pipe wall of a free end of the washing pipe is provided with a plurality of side holes; the washing pipe is connected with the lavage tube by a double-chamber glass connector; the device further comprises a semipermeable membrane used for closing the surface of a wound. The device has the characteristics of closing the wound rapidly, reducing the surface of the wound, realizing good drainage, quick healing and little suffering, and the like.

A refreshing and cool patch and a preparation method thereof. The invention discloses the refreshing and cool patch which includes a refreshing and cool patch body. The refreshing and cool patch body is composed of a back lining layer, a high-molecular gel layer and an anti-binding layer. The anti-binding layer is arranged at an upper layer of the high-molecular gel layer. The back lining layer is arranged at a lower layer of the high-molecular gel layer. The high-molecular gel layer includes following components, by weight: 30-32% of a high-molecular gel material, 1-2% of medicinal alcohol being 75% in mass concentration, 1-2% of mint essential oil, 1-1.5% of rosemary essential oil and 1.1-1.2% of chemical additives, wherein the components are added with pure water to 100%. The invention also discloses the preparation method of the refreshing and cool patch. The mint essential oil has a high-efficient temperature-reducing effect and has a mint fragrance which is cool and refreshing and can excite spirit. The rosemary essential oil has a strong shrinkage effect, can tightening loosened skin, and can reduce hyperemia and swelling. The refreshing and cool patch has effects of exciting spirit and refreshing head, alleviating fatigue and improving attention and is long in refreshing durability.

The invention relates to the technical field of coatings, in particular to a heavy-duty environment-friendly water-based industrial coating and a preparation method thereof. The heavy-duty coating environment-friendly water-based industrial coating comprises a two-component water-based epoxy primer and a water-based acrylic polyurethane coating finish paint, and the top face of the two-component water-based epoxy primer is coated with the water-based acrylic polyurethane coating finish paint; a novel waterborne epoxy emulsion and a waterborne epoxy component B are subjected to crosslinking curing to obtain the two-component waterborne epoxy coating, the two-component waterborne epoxy coating has high adhesive force, the corrosion resistance and shrinkage performance of a coating film are high, no organic solvent is contained or the content of volatile organic compounds is low, and environmental pollution is reduced; a defoaming agent with the optimal proportion of 0.1%-0.3% is selected, the phenomenon that a large number of shrinkage cavities are generated in a coating film is reduced, meanwhile, the use dosage of the wetting and leveling agent is controlled, the situation that the effect of the defoaming agent is affected by too large use amount is prevented, the problem that color paste is layered is solved, and the curing effect and the salt spray resistance of the finishing paint for the water-based industrial coating are effectively improved.

The invention provides a portable functional tent of a quadrangular-prismatic stretching overall structure, and belongs to the technical field of portable tents. The tent comprises retractable rods, sleeve rings, elastic ropes, rigid ropes, self-locking mechanisms, five pieces of cover cloth and an information collector; the four retractable rods intersect with one another, and the distribution positions of the eight vertices of the retractable rods are vertices of a quadrangular prism or a frustum of the quadrangular pyramid; each elastic rope is connected with the two vertices correspondingto the upper and lower bottom surfaces separately; each rigid rope is connected with the four vertices corresponding to the upper bottom surface or lower bottom surface of the structure separately. The five pieces of cover cloths are connected through zippers; the information collector includes an air quality sensor, an arduino single-chip microcomputer, a GPS positioning chip and a Bluetooth device. The structure has the advantages of being free of installation, high in contractility, small in occupation space and the like, has the function of information collection and monitoring, and conducts real-time information transmission and early warning with mobile devices such as mobile phones.

The invention discloses casting molding sand for a high-precision casting. The casting molding sand is prepared from the following raw materials in parts by weight: 160-180 parts of chromite sand, 20-30 parts of medical stone, 15-20 parts of iron red powder, 1-2 parts of superfine barium sulfate, 3-4 parts of carboxymethyl cellulose, 25-30 parts of aluminum ammonium sulfate, 2-3 parts of sodium tripolyphosphate, 2-3 parts of dodecylbenzenesulphonic acid, 2-3 parts of pine tar, 1-2 parts of lactose, 2-4 parts of silica sol, 7-9 parts of furan resin, 2-4 parts of polyoxyethylene lauryl ether, 8-10 parts of pea starch, 100-130 parts of quartz sand and an appropriate amount of water. The casting molding sand is smooth, high in adhesion, high in plasticity, high in thermal stability, high in air permeability, good in thermal stability and low in shrinkage rate, and the size of the casting is stable; by virtue of superfine barium sulfate, the fluidity and the dispersity of the molding sand are improved, and the collapsibility at high temperature is improved; the casting molding sand is easy to mold, a core is easy to manufacture, the phenomena of shrinkage cavities and shrinkage porosity infrequently occur, the casting yield is improved, and the casting molding sand is applicable to manufacturing of castings with high precision requirement.

The invention relates to a chitin fiber and silk fiber blended mask, which comprises a chitin fiber and silk fiber blended layer containing a nutrient solution, wherein the nutrient solution is prepared from the following components by weight percent: 40-60% of collagen peptide, 2-15% of sodium hyaluronate, 20-25% of cactus stem extract, 10-15% of aloe vera extract and 8-15% of vitamin C. According to the chitin fiber and silk fiber blended mask, the nutrient solution can penetrate stratum corneum of skin and then permeate dermis, effectively plays an efficient role in holding moisture, resisting wrinkles, restraining generation of melanin and delaying senescence; the mask can fit the skin well, no cut needs to be arranged, the nutrient solution can be fully absorbed, drop and leakage of the nutrient solution are avoided, much inconvenience caused to cosmetology of people by traditional masks is greatly improved, meanwhile, the mask has the characteristics of being soft, breathable, comfortable, fit, free of side effect and the like.

The invention discloses a dacron jacquard fabric and a production method thereof. The production method comprises the steps of (1), firstly raw material selection: selecting dacron DTY (drawn textured yarn) of 75D / 72F as warps, and selecting bamboo cotton blended yarns of B / J40S(60 / 40) as wefts; (2), performing inspection, finishing, sizing and drafting on the selected warps; (3) performing inspection on the wefts; (4) respectively placing the drafted wraps and the inspected wefts onto a multi-arm air jetting loom for weaving; (5), examining the molded fabric after weaving; (6), performing dyeing on the fabric for twice after qualified inspection; (7) sizing after dyeing; and (8) inspecting the molded and finished fabric and winding the fabric after qualified inspection. The production method is simple and low in processing cost, and the processed fabric is good in elasticity and high in softness and can be used for producing cotton-padded clothes, leisure wears and jackets.

The invention discloses special thixotropic resin for manufacturing glass fiber reinforced plastic (FRP) vehicles and ship hulls, and a preparation method thereof. The thixotropic resin is prepared by unsaturated polyester resin, modified low-shrinkage resin, fumed silica and additives, wherein the unsaturated polyester resin is prepared by phthalic anhydride, maleic anhydride, ethylene glycol and propylene glycol according to the mole ratio of 2:1:(0.6-0.8):(2.2-2.8). The method specifically comprises the steps of adding modified low-shrinkage resin into the unsaturated polyester resin to obtain matrix resin; then sequentially adding the matrix resin and fumed silica and additives into a thixotropic kettle dispersing at high speed for dispersing at high speed until the fineness of the mixed material reaches 30mu m, thus obtaining the thixotropic resin. The thixotropic resin is lower in linear shrinkage, incapable of having running phenomenon of resin glue liquid in construction on a perpendicular surface, and suitable for manufacturing the glass fiber reinforced plastic (FRP) vehicles and ship hulls, which have higher requirement for dimension stability.