1907 results about "Lubrication Agents" patented technology

The invention discloses an efficient-dissolution dotenorad tablet and a preparation method thereof, and relates to the technical field of tablet preparation. The tablet consists of 5-20 parts of a dotenorad active component, 10-30 parts of a disintegrating agent, 40-70 parts of a filling agent, 0.5-5 parts of a surfactant, 0.5-3 parts of a lubricant, 1-5 parts of an adhesive and 0.5-1 part of an antioxidant. The preparation method comprises the following steps: premixing active components and auxiliary materials, carrying out high-shear wet granulation to form porous structure particles, carrying out precise temperature-control drying through a fluidized bed, carrying out micronization treatment to regulate the specific surface area of the particles, and finally, carrying out high-pressure tablet forming through a magnesium stearate / aerosil compound lubrication system. The dissolution rate of the tablet in a medium with the pH value of 6.8 for 15 minutes reaches 85% or above, meanwhile, long-term stability is achieved by inhibiting oxidative degradation, and the tablet has the dual advantages of quick effect taking and stable storage.

The invention discloses an absorbable suture line for surgical suture and a preparation method thereof, and relates to the technical field of medical materials. The absorbable suture line for surgical suture is prepared from the following raw materials in parts by weight: 50 to 65 parts of polylactic acid, 15 to 20 parts of polyglycolic acid, 3 to 5 parts of sodium carboxymethyl cellulose, 3 to 8 parts of a toughening agent, 3 to 6 parts of an antibacterial agent, 0.3 to 0.8 part of a lubricating agent, 1 to 2 parts of sodium hyaluronate and 5 to 10 parts of polyvinyl alcohol. The toughening agent is obtained by reacting hydroxyethyl acrylate with ethylenediamine to generate a four-arm compound and then reacting with 6-caprolactone and DL-lactide. The absorbable suture line for surgical suture prepared by the invention has excellent tensile property and antibacterial property, and can meet the application requirements of clinical medical treatment.

Disclosed herein is a urinary catheter generally configured for self-deployment. The catheter includes a closed volume within the lumen of the catheter containing a lubricant. The proximal end and the distal end of the catheter tube are coupled with a handling member disposed along the catheter tube to define a compact packaging shape of the catheter tube including one or more loops. The closed volume is breached by separating the proximal and distal ends away from the handling member in a single step via simultaneous application of separating forces to the proximal and distal ends. The handling member includes a pull ring for applying an oppositely directed separating force to the handling member. The catheter includes an inlet section configured of insertion into the patient and an inlet collar is slidably coupled with the inlet section. where in the inlet collar serves as a guide during insertion of the catheter.

The invention relates to the technical field of high-performance polyester, in particular to a high-strength low-shrinkage polyester fiber and a preparation method thereof. The defects that existing polyester fibers are poor in strength and shrinkage resistance are overcome. The preparation method comprises the following steps: mixing the modified resin, the modified nano silicon dioxide, the composite antioxidant, the composite nucleating agent and the composite lubricant, and carrying out melt spinning. Wherein the modified resin is prepared from the following raw materials: dimethyl terephthalate, isophthalic acid, ethylene glycol and isosorbide; the modified nano silicon dioxide comprises nano silicon dioxide, KH570 and silver nitrate; the composite antioxidant comprises an antioxidant 1010, an antioxidant 168 and an antioxidant 1222; the composite nucleating agent comprises sodium benzoate and nano montmorillonite; the composite lubricant is prepared from ethylene bis stearamide and pentaerythritol stearate. The prepared polyester fiber is high in strength, high in shrinkage resistance and suitable for manufacturing of outdoor equipment.

The invention discloses a lubricant composition and application thereof in processing of a high-weather-resistance PC hollow plate, and relates to the technical field of lubricant compositions. The lubricant composition comprises the following components in parts by mass: 40-60 parts of base oil, 5-15 parts of a weather-resistant stable additive, 3-8 parts of an anti-wear reagent at extreme pressure, 2-6 parts of a dispersing agent, 1-4 parts of an antioxidant, 0.5-2 parts of a coupling agent and 20-30 parts of a solvent. Through the molecular collaborative design of the polar base oil and the solvent, the thermal decomposition tendency in the processing process is remarkably reduced, and a lubricating system is promoted to be upgraded to a low-volatilization and low-pollution green process direction. A weather-resistant additive molecular skeleton with anti-oxidation and anti-ultraviolet characteristics is innovatively constructed, integration of multiple protection mechanisms in material processing and service stages is realized, and dependence on secondary addition of auxiliaries in a traditional process is reduced.

The invention relates to a solvent-resistant medical connecting line sheath material and a preparation method thereof, and belongs to the technical field of high polymer materials. The sheath material is prepared from the following components: 38 to 44 weight percent of passivated toughening agent, 1.5 to 1.8 weight percent of heat stabilizer, 0.7 to 0.9 weight percent of lubricant, 0.12 to 0.15 weight percent of antioxidant and the balance of PVC (Polyvinyl Chloride) resin, the passivated toughening agent is prepared by the following steps: carrying out amine ester exchange reaction on 4-hydroxybutylamine and dimethyl difluoromalonate, introducing an alcohol-terminated hydroxyl group, carrying out substitution with dichloromethylvinylsilane to form a fluorine-containing chain compound, and finally carrying out double bond addition on methyl thioglycolate and a side chain; the passivation toughening agent is compatibilized through branched chain methyl ester and dynamically coordinated with a PVC molecular chain through a side chain thioether group, weakens the acting force between PVC chains, plays a good toughening role, inhibits dissolution through physical crosslinking, shields and passivates the PVC molecular chain, and relieves swelling of PVC in a solvent.

The invention discloses an anti-aging flame-retardant polyvinyl chloride material and a preparation method thereof. The anti-aging flame-retardant polyvinyl chloride material comprises the following raw material components in parts by weight: 100 parts of PVC resin, 0.6-2.4 parts of a lubricant, 15-27 parts of a plasticizer and 14-25 parts of a composite flame-retardant anti-aging reinforcing filler, wherein the composite flame-retardant anti-aging reinforcing filler is obtained by sequentially carrying out antioxidant loading and polymer grafting modification on a compound of graphene oxide, basic magnesium sulfate whiskers and mesoporous alumina. The prepared polyvinyl chloride has excellent aging resistance, flame retardance and mechanical strength, is good in thermal stability and excellent in comprehensive performance, and has a wide market application prospect.

The invention relates to the technical field of polypropylene materials, in particular to a polypropylene material for logistics turnover and a preparation process thereof. The polypropylene material for logistics turnover is prepared from the following components in parts by weight: 80 to 100 parts of polypropylene, 10 to 15 parts of modified nano zinc oxide, 5 to 10 parts of talcum powder, 3 to 5 parts of nucleating agent, 0.5 to 1.5 parts of lubricant, 0.5 to 1.0 part of antioxidant and 0.5 to 1.0 part of stabilizer. The preparation method comprises the following steps: S1, uniformly stirring polypropylene, modified nano zinc oxide, talcum powder, a nucleating agent, a lubricant, an antioxidant and a stabilizer to obtain a mixture; s2, adding the mixture into a twin-screw extruder for melt blending, extrusion and foaming to obtain the polypropylene material for logistics turnover, which not only has excellent mechanical properties, but also has excellent antibacterial properties and aging resistance.

The invention relates to a high-thermal-conductivity epoxy resin conductive adhesive containing a composite conductive filler and a preparation method of the high-thermal-conductivity epoxy resin conductive adhesive. The high-thermal-conductivity epoxy resin conductive adhesive containing the composite conductive filler comprises 6-16% of graphene oxide modified epoxy resin, 0.6-3% of a curing agent, 0-1% of a curing accelerator, 2-7% of epoxidized soybean oil modified single-layer / multi-layer carbon nanotubes, 3-7% of carbon fibers, 3-7% of nano silver powder, 40-70% of micron silver powder, 5.0-15.0% of a surface treating agent, 0.3-2.7% of a coupling agent, 0.5-1.5% of a dispersing agent, 0.1-0.3% of an antioxidant and 0.1-0.3% of a lubricant. 0.5% and the balance of a solvent. The graphene oxide modified epoxy resin and the epoxidized soybean oil modified single-layer / multi-layer carbon nanotubes are utilized to improve the dispersion stability of the filler, the modified single-layer / multi-layer carbon nanotubes are adopted as a short-range conductive additive, the carbon fibers are adopted as a long-range conductive additive, and the graphene oxide modified epoxy resin and the epoxidized soybean oil modified single-layer / multi-layer carbon nanotubes and the carbon fibers cooperate to improve the conductivity. The conductive adhesive disclosed by the invention is high in heat conductivity, low in volume resistivity and high in tensile strength and bending strength, and has a wide application prospect in the fields of automotive electronics, wind power photovoltaics, LEDs (Light Emitting Diode), LCDs (Liquid Crystal Display) and the like.

The invention provides an epoxy resin packaging bonding material with high bonding stability and a preparation method thereof. The packaging bonding material is prepared from the following raw material components: 8 to 18 percent of graphene oxide modified epoxy resin, 0.8 to 4.0 percent of a curing agent, 0 to 1 percent of a curing accelerator, 0.4 to 2.0 percent of a silane coupling agent, 2 to 7 percent of nano carbon black, 2 to 7 percent of carbon fiber, 40 to 60 percent of flaky silver powder, 4 to 8 percent of spherical silver powder, 4.4 to 13.6 percent of a surface treating agent, 4 to 6 percent of a reactive diluent, 0.5 to 1.5 percent of a toughening agent, 0.5 to 1.5 percent of a dispersing agent, 0.1 to 0.5 percent of a lubricating agent and the balance of a non-reactive diluent. Graphene oxide is utilized to modify epoxy resin, the dispersion stability of the filler is improved, modified carbon black is adopted as a short-range conductive additive, carbon fibers are adopted as a long-range conductive additive, the modified carbon black and the carbon fibers synergistically improve the conductivity, and the reinforcing effect is achieved. The packaging bonding material disclosed by the invention has the characteristics of low volume resistivity, high tensile strength and bending strength, high bonding stability and the like, and has wide application prospects in the fields of automotive electronics, wind power photovoltaics, LEDs (Light Emitting Diode), LCDs (Liquid Crystal Display) and the like.

The invention relates to the technical field of high polymer materials, and discloses a high-toughness halogen-free flame-retardant PC / ABS alloy and a preparation method thereof.The high-toughness halogen-free flame-retardant PC / ABS alloy is prepared by adding PC resin, ABS resin, a flexibilizer, an antioxidant, a halogen-free flame retardant, a lubricant and an anti-dripping agent accounting for 0.1%-0.2% of the total weight into a double-screw extruder, blending and extruding, the high-toughness halogen-free flame-retardant PC / ABS composite material is obtained. According to the halogen-free flame-retardant PC / ABS alloy disclosed by the invention, the halogen-free flame-retardant PC / ABS alloy not only can meet a 1.6 mmV-0 flame-retardant test, but also can meet a GB4943.1-2022 needle flame test standard by controlling different flowability of PC without additionally adding a PC charring accelerant and adding a small amount of anti-dripping agent.

The invention discloses an industrial high-temperature-resistant cable, and belongs to the technical field of cables. The cable comprises a cable core and a sheath layer wrapping the cable core. The sheath layer comprises the following components in parts by weight: 32-38 parts of alkenyl polyvinyl chloride, 38-42 parts of methyl vinyl silicone rubber, 15-20 parts of modified basalt fibers, 1-2 parts of a vulcanizing agent, 6-10 parts of a plasticizer, 1-2 parts of a lubricant, 1-2 parts of a stabilizer and 0.3-0.8 part of an antioxidant. Functional modification is performed on the surface of the basalt fiber, so that the basalt fiber and a polymer matrix of the cable sheath can form a multi-layer and firm chemical structure, and the comprehensive performance of the sheath material is effectively improved.

The invention relates to the technical field of cable materials, in particular to a flame-retardant efficient cross-linked polyolefin cable body and a preparation method thereof. The cable body comprises a polyolefin matrix, 2, 4-dihydroxy-6-methyl benzamide, an intumescent flame retardant, dicumyl peroxide, an antioxidant, a light stabilizer and a lubricant, wherein the polyolefin matrix is subjected to synergistic modification by phosphorus-nitrogen heterocyclic silane-plasma. The preparation method of the polyolefin matrix synergistically modified by phosphorus-nitrogen heterocyclic silane-plasma comprises the following steps: performing grafting reaction on polyolefin resin and phosphorus-nitrogen heterocyclic silane under the action of an initiator, and performing plasma surface treatment to endow the material with dual active sites. The preparation method comprises the following steps: melting and granulating a polyolefin matrix subjected to phosphorus-nitrogen heterocyclic silane-plasma synergistic modification, small organic molecules and auxiliaries, and performing extrusion molding under a crosslinking condition to obtain a cable body. The material disclosed by the invention has comprehensive advantages in flame-retardant efficiency, crosslinking degree and mechanical property, and is suitable for manufacturing high-safety power cables.

The invention relates to the technical field of medicines. The invention provides sapropterin hydrochloride powder and a preparation method thereof. The sapropterin hydrochloride powder comprises the following components in percentage by mass: 15%-30% of sapropterin hydrochloride, 50%-60% of a filler, 8%-18% of a cosolvent, 3%-6% of a lubricant, 1%-3% of a flavoring agent and 0.1%-1% of an antioxidant. The sapropterin hydrochloride powder prepared by adopting the technical scheme has the characteristics of good solubility, high stability, high bioavailability and convenience in taking.

The invention relates to the technical field of gasket detection, and discloses a compression resistance detection tool and method based on a rubber plastic gasket, the compression resistance detection tool comprises a detection table, a plane detector arranged at the top of the detection table, a placement table, a movable table fixedly connected to the top of the detection table, and a pressure applying assembly fixedly connected to the two sides of the top of the detection table, the sliding plate is arranged at the top of the detection table, and the lubricating assembly is arranged on the surface of the sliding plate; through cooperative use of a pressure applying assembly and a lubricating assembly, a sliding plate stretches a first pull rope through a sliding plate, the first pull rope drives a second pull rope to stretch, and the second pull rope drives a second rotating rod to rotate through a second pay-off wheel in the storage process, so that the second rotating rod drives a rotating rod to rotate through a transmission mechanism; and then a liquid conveying pipe is gradually rotated to the bottom of a pressure applying block, a suction pump conveys a lubricating agent in a liquid box into an atomization spray head, the bottom of the pressure applying block is sprayed with the lubricating agent, and therefore the effect of preventing adhesion is achieved.

The invention discloses a cable insulating material which comprises the following components in parts by weight: 40-60 parts of low-density polyethylene, 20-30 parts of an ethylene-vinyl acetate copolymer EVA, 2-5 parts of a composite anti-aging agent, 5-10 parts of a core-shell structure nano composite modifier, 1-2 parts of a lubricant, 3-8 parts of a compatilizer, 20-30 parts of a composite flame retardant, 5-10 parts of a nano reinforcing agent and 2-4 parts of phenylsilane. The core-shell structure modifier strengthens interface bonding, and cooperates with the modified nano reinforcing agent to disperse stress, so that the mechanics and high and low temperature resistance are improved; the composite anti-aging agent inhibits multi-path aging and improves the aging resistance. The material has the advantages of excellent mechanical properties, high and low temperature resistance and outstanding aging resistance, and meets the insulation quality and efficiency requirements of cables in complex use environments.

The invention belongs to the technical field of photovoltaic products, and particularly relates to a packaging adhesive film, a preparation method and a photovoltaic module. The invention provides a packaging adhesive film. The packaging adhesive film is prepared from the following raw materials: a polyolefin elastomer, an initiator, a cross-linking agent, a silane coupling agent, an antioxidant, an ultraviolet absorber and a lubricant, the preparation raw materials also comprise a functionalized polyolefin elastomer with the relative grafting ratio of 0.1-1 wt%. The invention further provides a preparation method of the packaging adhesive film. The invention further provides a photovoltaic module. In the technical scheme provided by the invention, the polyolefin elastomer is subjected to graft modification through the silane coupling agent, and the functionalized polyolefin elastomer is introduced, so that the intermolecular interaction force between the adhesive film and the backboard material is promoted, and the peel strength is improved; the technical defect that in the prior art, a photovoltaic packaging adhesive film is low in peel strength is overcome.

The invention relates to a low-smoke halogen-free flame-retardant plastic and a preparation method thereof, and belongs to the technical field of flame-retardant high polymer materials. The flame-retardant plastic is prepared from the following components: 12 to 17 weight percent of magnesium hydroxide superfine powder, 4.5 to 6.2 weight percent of modified flame retardant, 5 to 7 weight percent of flexibilizer, 0.9 to 1.2 weight percent of lubricant, 0.3 to 0.4 weight percent of antioxidant and the balance of PBT (Polybutylene Terephthalate) resin, the modified flame retardant is prepared by the following steps: reacting pentaerythritol with phosphorus oxychloride to prepare hydroxyl-containing polyhedral oligomeric phosphate, esterifying acryloyl chloride and the hydroxyl of the polyhedral oligomeric phosphate to prepare a monoester intermediate, and finally performing click addition on sulfydryl of pentaerythritol tetramercaptoacetate and double bonds of the monoester intermediate. The modified flame retardant interacts with magnesium hydroxide, a stable hollow carbon net is formed in the flame retardant process, and the hollow carbon net has a multi-layer adsorption and filtration effect on smoke particles, so that the release of smoke is reduced, and the smoke density is greatly reduced.

A lubrication system for a turbine engine. The turbine engine includes a propulsor and one or more rotating components. The lubrication system includes a sump, a primary lubrication system, an auxiliary lubrication system, and a kinetic energy storage system. The sump stores lubricant therein. The primary lubrication system supplies the lubricant from the sump to the one or more rotating components during normal operation of the turbine engine. The auxiliary lubrication system includes an auxiliary pump including an auxiliary pump shaft. The kinetic energy storage system includes a flywheel that engages the auxiliary pump shaft to power the auxiliary pump when the propulsor is windmilling such that the auxiliary pump pumps the lubricant from the sump to the one or more rotating components.

The invention discloses melogabalin besylate tablets and a preparation method thereof, a tablet core comprises melogabalin besylate, a filler, a disintegrating agent, a lubricant, a flow aid and a stabilizer, the disintegrating agent is sodium carboxymethyl starch, and the stabilizer is tocopherol and tartaric acid; on the basis of selecting sodium carboxymethyl starch as a disintegrating agent, the melogabalin besylate tablet of which the stability (especially the quality control of impurities I) is superior to that of a reference preparation is prepared by investigating the variety and the dosage of a stabilizing agent and selecting a specific stabilizing agent combination; the technical prejudice that the stability of calcium carboxymethyl cellulose is superior to that of sodium carboxymethyl starch in the prior art is overcome.

The invention belongs to the technical field of composite pipes, and relates to a polytetrafluoroethylene and soluble polytetrafluoroethylene composite pipe as well as a processing method and application thereof. The preparation method comprises the following steps: firstly, carrying out ring opening polymerization on D3F and blocking by using an amino-containing silane coupling agent to prepare amino-terminated fluorosilicone oil, and taking the amino-terminated fluorosilicone oil as a lubricating agent for compounding and processing PTFE and PFA. The amino-terminated fluorosilicone oil contains a CF3 chain segment which has excellent compatibility with PTFE or PFA, and meanwhile, the cross-linking agent is added to form a chemical bond and a cross-linked structure with amino at the tail end of the lubricant, so that the wear resistance, tensile strength, permeability resistance and high-temperature creep resistance of the PTFE and PFA composite pipe can be improved, and the PTFE and PFA composite pipe can adapt to a long-term high-temperature working environment.

The invention relates to the technical field of high-molecular polypropylene films, and discloses a PP film for a low-loss capacitor, which is prepared from the following ingredients in parts by mass: 80 to 95 parts of heat-resistant polypropylene resin base materials, 3 to 12 parts of dielectric modifiers, 0.1 to 0.2 part of nucleating agents, 0.05 to 0.8 part of lubricating agents and 1 to 3 parts of stabilizing agents. Through the synergistic effect of specific components, for example, large conjugate structures of the dielectric modifier and the stabilizer synergistically absorb and dissipate electric field energy and the like, the dielectric loss of the PP film is effectively reduced, so that the PP film can reduce heating of a capacitor in a high-frequency or high-voltage application scene, the service life of the capacitor is prolonged, and the safety of the capacitor is improved; and the strict standard of modern electronic equipment on dielectric loss of the capacitor is met. The PP film provided by the invention can maintain the stability of dielectric constant and dielectric loss in a high-temperature working environment, solves the problem of performance reduction caused by insufficient heat resistance of a traditional PP film, and expands the applicability of a capacitor in a high-temperature application scene.

A protective flanged seal structure for a bearing assembly of track system wheels is presented. The protective flanged seal structure incorporates an attachment surface connected to a sealed bearing housing of the track system, a sealing element configured to contact a rotary part of the track system, one or more resilient lips radially extending from the sealing element to maintain resilient contact with the rotary part during movement, and a lubricating agent sealably contained by the sealing element. The one or more radially extending resilient lips are configured with externally facing slanted profiles to shield the sealed bearing housing from exposure to debris or moisture. The protective flanged seal structure further incorporates a fluid inlet structure to facilitate insertion of the lubricating agent for replenishment.

A lubricating system configured to provide a lubricating oil from a lubricant reservoir to a fluid end by use of a pump. The lubricating system has a plurality of check valves that each have an elastomeric insert. The lubricating system also has at least one pressure relief valve that is configured to re-rout lubricant to the lubricant reservoir when needed to stabilize pressure within the system. The lubricating system uses a pump drive controller and at least one sensor to selectively turn the pump on and off.

The invention relates to the technical field of polyolefin materials, in particular to a mildewproof and antibacterial polyolefin material and a processing technology and application thereof. The mildew-proof antibacterial polyolefin material comprises the following components in parts by weight: 60-80 parts of polypropylene, 5-15 parts of an elastomer, 2-5 parts of maleic anhydride grafted polypropylene, 15-25 parts of white oil, 10-30 parts of talcum powder, 1-5 parts of a mildew-proof antibacterial agent, 0.5-1.0 part of an antioxidant and 1-3 parts of a lubricant. The mildew-proof antibacterial agent is a mixture prepared from 0.5 to 2.0 parts of modified nano zinc oxide, 0.3 to 1.5 parts of methylisothiazolinone and 0.2 to 1.5 parts of epsilon-polylysine hydrochloride. The mildew-proof and antibacterial polyolefin material prepared by the invention has excellent mechanical properties and mildew-proof and antibacterial properties.

The invention provides a peroxide crosslinked polyethylene pipe as well as a preparation method and a preparation system thereof, and belongs to the technical field of polyethylene pipes. According to the peroxide crosslinked polyethylene pipe disclosed by the invention, the high-density polyethylene and the ultra-low-density polyethylene are adopted, and the antioxidant and the lubricant are combined, so that the heat resistance, the flexibility, the creep resistance, the environmental stress cracking resistance, the radiation resistance and the oxidation resistance of the peroxide crosslinked polyethylene pipe are improved; meanwhile, a polymer containing boric acid ester bonds is added into the assistant crosslinking agent, so that the crosslinking uniformity, radiation resistance, heat resistance, durability, aging resistance and mechanical properties of the peroxide polyethylene pipe are improved.

The invention relates to a doxepin hydrochloride tablet. The doxepin hydrochloride tablet is prepared from doxepin hydrochloride, polyethylene glycol 6000, a filling agent, a disintegrating agent, a flow aid and a lubricating agent. The preparation method comprises the following steps: heating and melting polyethylene glycol 6000, adding a doxepin hydrochloride raw material according to a prescription proportion, and uniformly stirring and mixing; and after complete melting, rapidly cooling and solidifying to form a solid dispersion. And after curing, drying in a drying oven, crushing and sieving. And uniformly mixing the crushed particles with the filler and the lubricant, and directly tabletting. The doxepin hydrochloride has high hygroscopicity, is unstable to damp and heat and easily generates a large amount of impurities under strong oxidation conditions, the doxepin hydrochloride is firstly prepared into a solid dispersion and then is directly compressed, so that the medicine is highly dispersed in a carrier material in the states of molecules, colloids, amorphous forms, microcrystals and the like, and the effect of wrapping the medicine is achieved by controlling the ratio of the medicine to the carrier. Direct contact between the medicine and air is avoided, so that the problems of hygroscopicity and instability of the medicine are solved, and the product stability is improved.

The present invention discloses a tofacitinib citrate sustained-release tablet preparation and a preparation method thereof, which belongs to the technical field of pharmaceutical preparations. The sustained-release tablet comprises a double-layer core and a coating layer; the double-layer core comprises a drug-containing layer and a push layer; wherein the drug-containing layer comprises: tofacitinib citrate, an adhesive, polyethylene oxide, a glidant and a lubricant; the push layer comprises: mannitol, an adhesive, red iron oxide, polyethylene oxide, a glidant and a lubricant; the coating layer comprises: cellulose acetate, a pore-forming agent, a plasticizer, water and acetone. The sustained-release tablet preparation of the present invention solves the technical problems existing in the prior art by adopting a double-layer osmotic pump prescription design, adopting non-hygroscopic materials such as mannitol, adopting a standard round tablet design, preparing a sustained-release coating layer without using methanol, and adopting a coating machine for coating and curing.

The invention relates to a composite resin material for 3D printing and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 60-90 parts of polylactic acid, 5-15 parts of a toughening agent, 5-15 parts of a flame retardant, 5-10 parts of modified carbon nanotubes, 0.3-1 part of an anti-hydrolysis agent and 0.3-0.5 part of a lubricant. The flame retardant is added, a phosphate structure, a benzene ring and a hindered phenol structure are introduced into 5, 5 '-dibromo-[2, 2'-bipyridyl]-3, 3 '-diamine, and efficient flame retardance is achieved and the anti-aging performance of the composite resin material is enhanced through multiple synergistic effects of hindered phenol-phosphorus heterocycle-bipyridyl. The modified carbon nanotube is added as a reinforcing agent, so that the mechanical property of the composite resin material is remarkably improved, and the composite resin material is endowed with antibacterial property.

The present invention relates to a packaged condom comprising a sealed package; and within the package, a condom comprising natural rubber latex and / or synthetic polyisoprene; wherein the condom comprises, on one or more surfaces thereof and in contact with the natural rubber latex and / or synthetic polyisoprene, an aqueous lubricant; wherein the aqueous lubricant comprises: a thickener and 5 wt.% to 30 wt.%, based on the total weight of the aqueous lubricant, of a humectant comprising at least one organic compound selected from the group consisting of glycerol, propylene glycol, polyethylene glycol, and any combination thereof; and one or more sugar alcohols having a molecular weight of from 120 to 10000 g / mol. It also relates to a method for preparing a packaged condom and to the use of an aqueous lubricant to lubricate one or more surfaces of a condom. The condom preferably presents a transparent appearance to the end user.