56results about How to "Easy to calender" patented technology

The invention discloses a production process of baking base paper. The baking base paper is prepared by adopting 100% bleached softwood pulp through pulping, heavy residue removal, beating, adding of a wet strength agent, dilution, heavy residue removal, screening, adding of an internal sizing agent and a defoaming agent, dilution, net loading, formation, squeezing, first-stage drying, first-stage calendering, second-stage drying, surface sizing, third-stage drying, second-stage calendering and taking-up. Due to adoption of a preparation process of three stages of drying, two stages of calendering and one stage of impregnated surface sizing, generation of seersucker paper defects is reduced, the paper is good in flatness, high in smoothness and large in tightness, a use quantity of an oil-proofing agent is easy to control, and the use quantity of the oil-proofing agent is reduced; meanwhile, the oil-proofing agent is uniformly distributed, and the problem of food residues in the process of stripping foods is reduced.

The invention belongs to the technical field of sealing materials and particularly relates to a rubber material for a sealing ring of a transformer and a preparation method of the rubber material. The rubber material is prepared from the following raw material in parts by weight: 50-70 parts of nitrile rubber, 20-30 parts of acrylic rubber, 5-10 parts of epichlorohydrin rubber, 3-8 parts of wood fibers, 5-10 parts of nanometer titania, 15-25 parts of a fortifier, 1-5 parts of an anti-aging agent, 1-3 parts of an accelerate, 1-3 parts of sulfur, 3-6 parts of zinc oxide, 4-8 parts of stearic acid, 3-6 parts of asphalt, 1-3 parts of chlorinated paraffin, 10-15 parts of a plasticizer and 5-15 parts of a cross-linking agent. The rubber material for the sealing ring of the transformer is high in strength, small in compressive deformation and excellent in anti-aging performance.

The invention discloses a preparation method of a gutta-percha combined rubber compound for normal-temperature forming and processing and relates to a rubber forming and processing method. Rubber is put in an internal mixer, a screw extruder or an open mill for plastifying, then stored natural rubber is mixed with 20-60 parts of carbon black, 30-80 parts of white carbon black and 2-10 parts of plasticizer in the equipment mentioned above, and rubber master batch is obtained and stored for 2-24 hours; gutta-percha is put in the internal mixer, the screw extruder or the open mill for plastifying, other accessory ingredients are added, gutta-percha rubber compound is obtained; and the gutta-percha rubber compound which is not stored and the rubber master batch are simultaneously added into the internal mixer or the open mill for uniform mixing (operation is performed at the low temperature between 25 DEG C and 35 DEG C), and then discharging is performed. By means of the preparation method of the gutta-percha combined rubber compound for normal-temperature forming and processing, the hardness of the gutta-percha and rubber compound combined with the gutta-percha is effectively lowered, the plasticity of the gutta-percha combined rubber compound is improved, the effect that the plasticity of a normal rubber compound is achieved is ensured, a series of operations such as rolling, extrusion and forming can be facilitated under the normal conditions, and the practical application value is good.

The invention relates to a high-hardness plastic paving material. The high-hardness plastic paving material comprises a matrix layer, wherein the matrix layer contains 100wt% of PVC resin, 10wt%-60wt% of a solid plasticizer and 60wt%-510wt% of an additive, and the solid plasticizer is selected from modified environment-friendly plastic and / or EPDM with a melting temperature of 50-150 DEG C. By adding the solid plasticizer is into the matrix layer of the plastic paving material and utilizing a reasonable formula design, the hardness of the high-hardness plastic paving material is remarkably improved; and because the melting temperature of the selected solid plasticizer is lower than a calendering temperature of PVC, the fluidity of the PVC during melting can be improved, and calendering formation is facilitated.

The invention discloses a flame-retardant high-temperature-resistant cable comprising a copper conductor, a fluoroplastic insulating layer wrapping the copper conductor, a silicone rubber inner sheath wrapping the fluoroplastic insulating layer, and an oversheath wrapping the silicone rubber inner sheath, wherein the oversheath is made of natural rubber composite material, and the raw materials of the natural rubber composite material include natural rubber, terpolymer EP rubber, butyl rubber, nylon 66, epoxy resin, eleaostearic acid, zinc oxide, sulphur, Bis(tert-butylperoxy), N,N'-m-phenylenedimaleimide, montmorillonite, kaolin, powdered steatile, zinc borate, aluminium hydroxide, promoter MBTS, promoter DPG, promoter CBS, antioxidant and phosphorus-containing fire retardant. The flame-retardant high-temperature-resistant cable is high in strength and has excellent high temperature resistant, aging resistant and flame retardant performances.

The invention relates to the field of plastic processing, and discloses a four-roller plastic calender with a wider application range. The four-roller plastic calender comprises a calender shell, wherein a first sliding rod is arranged inside the calender shell, and the surface of the first sliding rod is slidably connected with sliding blocks; the surfaces of the sliding blocks are sleeved with moving plates, rotating discs are rotationally connected to the ends, away from the first sliding rod, of the sliding blocks, and rolling rollers are rotationally connected to the other ends of the rotating discs; and a rotating handle is connected to the right side of the calender shell in an inserted mode, a gear is fixedly connected to the surface of the left end of the rotating handle, and a bearing is fixedly connected to the surface of the rotating handle; and second connecting rods are fixedly connected to one sides of the sliding blocks. The moving plates, the gear, the rotating handle,the bearing and the sliding blocks are arranged to form the device capable of being lifted manually, and synchronous lifting of the rolling rollers can be guaranteed, so that deviation, caused by lifting, of calendered plastic is avoided, and the practicability and functionality of the device are improved.

The invention discloses a production technology for a coarse double-grain rubber slab. The production technology comprises the following steps: 1) raw material pretreatment; 2) weighing preparation; 3) mixing; 4) calendering; 5) cooling; 6) grain cloth pretreatment; 7) vulcanization; 8) inspection; and 9) trimming, inspection and packaging. The production technology improves the pretreatment of arubber compound, and correspondingly refines latex reclaimed rubber and natural rubber, so the plasticity of the latex reclaimed rubber is improved, subsequent calendering, extrusion and molding are facilitated, and the obtained coarse double-grain rubber slab has a stable shape and a clear pattern.

The invention discloses a flame-retardant high-temperature-resistant cable comprising a copper conductor, a fluoroplastic insulating layer wrapping the copper conductor, a silicone rubber inner sheath wrapping the fluoroplastic insulating layer, and an oversheath wrapping the silicone rubber inner sheath, wherein the oversheath is made of natural rubber composite material, and the raw materials of the natural rubber composite material include natural rubber, terpolymer EP rubber, butyl rubber, nylon 66, epoxy resin, eleaostearic acid, zinc oxide, sulphur, Bis(tert-butylperoxy), N,N'-m-phenylenedimaleimide, montmorillonite, kaolin, powdered steatile, zinc borate, aluminium hydroxide, promoter MBTS, promoter DPG, promoter CBS, antioxidant and phosphorus-containing fire retardant. The flame-retardant high-temperature-resistant cable is high in strength and has excellent high temperature resistant, aging resistant and flame retardant performances.

A method and a device for calendering a paper or paperboard web, in which the web is led first into a calendering step and then into a reeling step. At least one edge area of the web is calendered separately in the reeling step.

The invention belongs to the field of rubbers, and concretely relates to an insulation sealing rubber strip for switch cabinets, and a production method thereof. The insulation sealing rubber strip comprises an inner layer and an outer layer; the inner layer is made from nitrocellulose resin, n-butyl methacrylate, cis-polybutadiene rubber, ethylene-propylene-diene monomer, bromobutyl rubber, reticular polyimide, calcium carbonate, paraffin oil, attapulgite, carbon nanofibers, stearic amide, zinc oxide, N-cyclohexyl-2-benzothiazole sulfenamide, sulfur, carbon black, white carbon black, tackifying resin, titanate, phenyl silicone oil, a plasticizer, an antioxidant and assistants; and the outer layer is made from polyimide, calcium carbonate, microcrystalline wax, the antioxidant and the assistants. The insulation sealing rubber strip has the advantages of good insulation property, good ozone resistance, good thermal ageing resistance, good low temperature resistance, good chemical corrosion resistance, good impact and water resistance, and high toughness, strength and wear resistance. The invention also provides the production method of the insulation sealing rubber strip.

The invention provides an anti-aging rubber sealing ring material and a preparation method thereof, and belongs to the technical field of rubber sealing materials. The preparation method of the anti-aging rubber sealing ring material comprises the following steps of weighing of raw materials by weight, raw material mixing, primary mixed material re-treatment, secondary rubber compound re-treatment, die assembly and vulcanization molding, edge cutting and trimming, and quality inspection and classification. The anti-aging rubber sealing ring material and the preparation method thereof have theadvantages that bauxite powder is dispersed in a raw material network structure, so that the wear resistance of a rubber gasket is improved; due to the use of a plasticizer, the vitrification temperature of rubber is reduced, the plasticity and fluidity of the rubber are enhanced, and the hardness and tensile stress of the rubber are reduced; nano silicon dioxide and quartz fiber are added, so that the pressure resistance, anti-aging performance and corrosion resistance of the sealing ring material are enhanced, and the phenomena of overflow and leakage are effectively prevented; the preparation process is simple, and the cost is low.

The invention relates to rubber for a fabric core laminated flame-retardant conveyor belt covering layer and a preparation method thereof, belonging to the technical field of flame-retardant covering. The preparation method comprises the following steps: adding chlorinated polyethylene, butadiene styrene rubber and natural rubber into an internal mixer or an open mill; sequentially adding a flame retardant, metal oxides, stearic acid, an anti-aging agent, a reinforcing agent and a plasticizer; and finally, adding a vulcanizing agent and a vulcanizing accelerator, uniformly mixing to obtain covering layer rubber, and vulcanizing on a flat vulcanizing plate, thereby obtaining the product. The chlorinated polyethylene, butadiene styrene rubber and natural rubber serve as a matrix, a high-efficiency flame retardant is filled, and an excellent flame-retardant effect is achieved. Meanwhile, by filling carbon black and silica filler, the mechanical property is greatly improved, and high mechanical property and good flame-retardant effect can be considered simultaneously. The various performances of the covering layer rubber composite material can meet the MT830 standard.

The invention discloses an injection molding and compression molding method of a composite tufted carpet plastic interior ornament. The method comprises the following steps of: a, selecting a composite tufted carpet; b, heating the composite tufted carpet; c, opening a mold, fixing the composite tufted carpet in the injection mold, and then closing the mold; d, injecting plastic in an amount which is 10 to 20 percent of the required injection molding total amount under low pressure at a low speed by an injection molding machine through a plurality of hot runners; e, opening the injection moldto reserve certain clearance between a movable mold and a fixed mold, and starting the injection molding machine to inject the rest plastic of the required injection molding total amount under high pressure at a high speed; f, closing the mold, forming the composite tufted carpet plastic interior ornament by pressing, and simultaneously cutting the redundant edge and cooling; and g, opening the mold, and taking out the composite tufted carpet plastic interior ornament. The method is low in production condition requirement, good in product quality and high in production efficiency, the required equipment is cheap, and the produced product can be popularized in a large range.

The invention relates to the production technology of flexible graphite paper, in particular to a flexible graphite paper calendering device. The flexible graphite paper calendering device is composed of a plurality of sequentially-arranged calenders 2. Each calender is composed of a rack 3, a driving compression roller 4, a driven compression roller 5, a compression roller transmission mechanism and an adjusting mechanism for adjusting a calendering gap formed between the two compression rollers, wherein the adjusting mechanism comprises bearing boxes arranged inside the two sides of the rack, and further comprises a wedge-shaped sliding block and an electric control device of the calendering gap adjusting mechanism, the bearing boxes are in threaded connection with a screw rod of a first worm and gear mechanism, the wedge-shaped sliding block is in sliding fit with the inclined lower bottom edges of the bearing boxes and provided with the inclined upper surface, and the wedge-shaped sliding block is in threaded connection with a screw rod of a second worm and gear mechanism installed on one side of the rack. The flexible graphite paper calendering device has the advantages that independent transmission mechanisms of the calenders are arranged, the device is compact, the using effect is good, and maintenance and disassembly are convenient; the calenders with the same size and diameter are arranged at intervals, loosening and tensioning pressure is applied to graphite paper, and calendering and extending are facilitated; intelligent closed-loop control is adopted, precision of graphite paper calendering thickness is controlled to be high, and control is flexible and reliable.

The invention provides a material used in a ballscrew. The material comprises the following components in percentage by weight: 0.58-0.63% of carbon element, 0.5-0.80% of manganese element, less than or equal to 0.015% of phosphorus element, less than or equal to 0.015% of sulfur element, 0.15-0.35% of silicon element, 0.10-0.25% of chromium element, less than or equal to 0.20% of copper element, less than or equal to 0.10% of molybdenum element, less than or equal to 0.20% of nickel element, less than or equal to 0.05% of vanadium element, 0.020-0.040% of aluminum element, and the balance iron element. Steel smelted by adopting the alloy-elements-containing material of the invention overcomes weaknesses of GCr15 steel completely, improves internal organizational structure of the steel, reserves the original advantages of the GCr15 steel, is easy-cutting and easy-calendering, and improves the quenching brittleness and deformation ability; in addition, the material of the invention is particularly suitable for production adopting a cold-rolling technology; therefore, the traditional productive technology of the ballscrew is completely changed, and excellent social and economic effects are created.