39results about How to "Reduce mold release" patented technology

The invention discloses PVC (polyvinyl chloride) pellets special for ultrahigh-transparency hard medical injection molding apparatuses. The PVC pallets comprise, by weight, 100 parts of polyvinyl chloride resin with the degree of polymerization being 700, 3.0-4.0 parts of methacryIate-Butadiene-Styrene copolymer, 1.5-2.0 parts of methacrylate processing aid, 2.0-2.2 parts of methyltin mercaptide heat stabilizer, 2.0-2.3 parts of butyl dodecanoate lubricant, 0.2-0.3 part of stearic acid, 0.1-0.25 part of oxidized polyethlene wax and trace indigo pigment. The finished products are prepared by means of feeding the components into a high-speed heating mixer according to the proportion for high-speed mixing, performing kneading to the temperature of 123-125 DEG C prior to discharging, putting the discharged material into a low-speed cooling mixer to be cooled to room temperature to obtain mixed powder, feeding the mixed powder into a pelletizer for pelletizing, and cooling the pellets to the temperature lower than 40 DEG C prior to packaging. The medical injection molding apparatuses made of the PVC pellets have ultrahigh transparency and surface glossiness.

The invention provides an unbleached pulp, and a preparation process, an application and a preparation device of the unbleached pulp, and relates to the technical field of pulping by utilizing a straw. The choices for the raw material of the unbleached pulp are wide, a wheat straw, a rice straw, a reed straw or a waste wood chip are used efficiently as the pulping raw material, so that the pulping cost is obviously lowered. The preparation process of the unbleached pulp uses the new technique to replace steam heating to soften the raw material, the problem of a pulp black liquor existing in the pulping process is solved while the heating cost is obviously reduced. The flow of the production process is simplified, the electricity and the water are efficiently saved, the resource utilization rate is effectively increased, and the production of no wastewater or waste materials is guaranteed in the production process. The special production process is used to pulp, the beating degree is high, the quality is better, the performance of a pulp product is stable, the pulp product is widely applied to the functional degradable material, and the functional applicability and the material quality are obviously strengthened in the application fields of preparation of corrugated paper, industrial packaging materials, preparation of plates, and preparation of tableware.

The invention discloses a glass film coating device. The device comprises an upper horizontal plate, a lower horizontal plate and a vertical support plate. One end, far away from a suction ventilator,of the upper horizontal plate is provided with a film coating processing device. A film coating roller is fixed between connecting blocks. A film coating liquid adding device is disposed above the film coating roller. A receiving plate is provided with brush hair. One end, far away from the receiving plate, of a film coating liquid pipe is connected to a film coating liquid tank. A threaded ringlayer is arranged in the film coating liquid tank. A threaded extrusion plate is movably disposed in the threaded ring layer. A rotating plate is provided with a rotating electric machine. A supporting column is provided with a plurality of telescopic stirring rods. The invention provides the glass film coating device. A built-in cleaning dust removing device can ensure that the glass has no adhered impurities before coating and reduce pinholes or demolding after coating. A device for controlling the uniform liquid discharge is arranged in the film coating liquid tank and the film coating liquid is stirred white being uniformly discharged so that sedimentation is prevented, the operation linkage is simple and the effect is good.

The present invention provides a heat-curable release coating composition which can form a cured film excellent in releasability and residual adhesion at a relatively low temperature while the film is formed by film formation. The thermosetting release coating agent contains a methylated melamine resin (A), a polyol (B) having a molecular weight of 100 to 3000, and an acid catalyst (C).

The invention relates to an environment-friendly heat-resistant high-toughness PVC transparent granular material, and preparation and application thereof. The granular material is prepared from, by weight, 90-120 parts of PVC resin, 15-30 parts of modified filled butadiene styrene rubber, 0.2-0.5 parts of an anti-aging agent, 2-4 parts of a thermal stabilizer, 0.8-1.2 parts of organic silicon modified plant oil, 1-4 parts of oxidized polyethlene wax, and 1-3 parts of phytosterol rice bran oleate. The granular material can be used for producing electrical tubular parts. Compared with the priorart, an electrical tube prepared from the PVC transparent granular material has great transparency with light transmittance reaching 92.4%; the material is excellent in compressive property, processability and anti-aging performance, can effectively overcome defects that a PVC composition tube material is liable to be aged and is poor in appearance. The material can improve anti-aging performanceand appearance and prolong the service life of the tube material, broadens application range of products, satisfies market demands, and has excellent application prospect.

The invention relates to a reducing piled force-expanding type oil cylinder opening-closing device. In the invention, a short-stroke large-cylinder-diameter flat oil cylinder is connected between a piston rod and a cross arm of a power oil cylinder, wherein the piston rod of the flat oil cylinder is connected with the piston rod of the power oil cylinder, and a close hole end cover of the flat oil cylinder is connected with the cross arm. The using method comprises the following steps of: filling hydraulic oil into an inlet-outlet oil hole of a piston cavity of the flat oil cylinder to ensure that oil enters the piston cavity and the piston rod is in a fixed state; acting on the close hole end cover of the flat oil cylinder by the piston cavity after the oil enters the piston cavity to ensure that the close hole end cover pushes the cross arm and a pull rod pulls a metal die core, wherein because the sectional area of the piston cavity of the flat oil cylinder is an odd number times that of the piston cavity of the power oil cylinder, under the action of several times of pulling force, the metal die core and an outer die of a metal die form a die opening and core pulling distance space; and then filling oil into the piston cavity of the power oil cylinder to finish the overall die opening and core pulling action of the metal mold. The invention is applied to a metal die core pulling and demoulding casting process, reduces the shut-down waste caused by the braking of the metal die core, saves the resources and improves the working efficiency.

The invention discloses a spray-type release agent for production of artificial stone and a preparation method and a use method of the spray-type release agent. The spray-type release agent comprisesthe following raw materials: polyvinyl alcohol, paraffin, hydrotalcite powder, magnesium silicate, magnesium aluminum silicate, zinc oxide, magnesium hydroxide, polytetrafluoroethylene, cellulose, xanthan gum, sodium tripolyphosphate, sodium carbonate, modified camellia oil, 1-dodecyl-3-methylimidazolium nitrate and dipotassium N-octadecyl sulfosuccinamate. The release agent is prepared by the steps of dissolving polyvinyl alcohol, mixing with an additive and the like. The use method comprises the following steps: spraying the release agent onto the surface of an artificial-stone production mold; performing natural drying and curing; and forming an anti-sticking coating on the surface of the mold. Polyvinyl alcohol, paraffin, modified camellia oil, 1-dodecyl-3-methylimidazolium nitrate anddipotassium N-octadecyl sulfosuccinamate are taken as a reinforcing system to take a synergistic effect. Thus, the drying filming time is shortened synergistically, the production cycle is shortenedand the efficiency is improved.

The invention discloses an environment-friendly release agent for autoclaved aerated concrete blocks. The environment-friendly release agent is prepared from the following raw materials in parts by weight: vegetable oil, a POSS-phosphorylated vegetable oil polymer, polyethylene glycol, nano calcium carbonate, ammonium polycarboxylate, a compound emulsifier, C12 alcohol ester, emulsified silicone oil, xanthan gum and water. The invention also discloses a preparation method of the environment-friendly release agent for autoclaved aerated concrete blocks, which comprises the following steps: dispersing the POSS-phosphorylated vegetable oil polymer into the vegetable oil containing polyethylene glycol to obtain a dispersion liquid; dissolving a compound emulsifier, emulsified silicone oil and xanthan gum in hot water to obtain emulsified water; and adding nano calcium carbonate, ammonium polycarboxylate and emulsified water into the dispersion liquid, adding the C12 alcohol ester and adding water for dilution, and uniformly stirring all the components to obtain the modified vegetable oil environment-friendly release agent. The release agent disclosed by the invention has the advantages of high film forming speed, small adhesion amount, low cost, no toxicity, no pollution and good release effect.

There is provided an imprint material that allows a resin film to be readily released from a mold at the time of mold release after curing, that is, an imprint material that forms a film having a low mold release property as well as high transparency, high scratch resistance, and a high fingerprint wiping-off property; and a film which is formed from the material and to which a pattern is transferred. An imprint material including: a (A) component: a compound having a propylene oxide unit and two polymerizable groups or a compound having a propylene oxide unit, an ethylene oxide unit, and two polymerizable groups; a (B) component: a silicone compound; and a (C) component: a photopolymerization initiator.

The invention discloses an environment-friendly high-efficiency nylon demoulding master batch and a preparation method thereof. The environment-friendly high-efficiency nylon demoulding master batch is prepared from the following raw materials in parts by mass: 60 to 80 parts of nylon slices, 10 to 20 parts of nano silicon dioxide, 5 to 10 parts of EBS and 0.2 to 0.5 part of an antioxidant. Nylon6 slices are used as a matrix, nano silicon dioxide, a lubricant and an antioxidant are added, and a parallel twin-screw extruder is used for mixing to obtain the master batch. The nylon demoulding master batch prepared by utilizing the nucleating effect of nano silicon dioxide and the lubricating and dispersing effects of EBS can remarkably improve the demoulding effect of a product during injection molding by adding a small amount of the nylon demoulding master batch into nylon 6, and the forming period is shortened.