71results about How to "Barrier" patented technology

The invention discloses a starch-containing biodegradable barrier thin film, as well as a preparation method and application thereof. The biodegradable barrier thin film is prepared from 0-80% of biodegradable homopolyester, 0-80% of biodegradable copolyester, 1-30% of aliphatic polycarbonate, 5-60% of starch and 2-30% of polylol. The biodegradable barrier thin film disclosed by the invention is formed by mixing the biodegradable homopolyester with higher biodegradation speed, the biodegradable copolyester with better processing performance and the aliphatic polycarbonate with good barrier property according to different proportions, and the thin film prepared from an obtained composition has biodegradability and barrier property, and can be widely applied to the packaging field, in particular to the food and medicine packaging field.

The invention discloses a nanometer silicon dioxide modified epoxy resin coating. The nanometer silicon dioxide modified epoxy resin coating comprises the following raw materials by weight: 55 to 70 parts of epoxy resin, 8 to 15 parts of chlorinated rubber, 5 to 18 parts of silicone resin, 9 to 15 parts of alkyd resin, 1 to 3 parts of graphene oxide, 3 to 8 parts of nanometer silicon dioxide, 2 to8 parts of charcoal powder, 1 to 3 parts of silicon carbide, 0.3 to 1.8 parts of nanometer titanium black, 2 to 6 parts of precipitated barium sulfate, 0.7 to 3 parts of bamboo fiber, 3 to 9 parts ofbasalt flakes, 2 to 8 parts of nanometer aluminium oxide, 9 to 25 parts of a curing agent, 0.1 to 1 part of 1-pyrenebutyric acid, 20 to 30 parts of a solvent and 0.2 to 1.5 parts of an auxiliary agent, wherein the curing agent is a mixture of n-butyl trimellitate anhydride, 2-ethyl-4-methyl imidazole, zinc acrylate and a boron-amine curing agent 594. The nanometer silicon dioxide modified epoxy resin coating provided by the invention has high strength, good heat resistance and wear resistance and excellent corrosion resistance.

The invention relates to high-temperature-resistant flame-retardant nylon and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the method, traditional nylon 6 or nylon 66 is modified, 1-5% of a cross-linking agent of a polyfunctional monomer, 1%-8% of a heat stabilizer, 5-25% of a flame retardant and 1-8% of EVA particles are added into a preparation formula for melt blending extrusion, then a cobalt source or an electron accelerator is used for irradiation treatment, and the irradiation dose is 10-200 kGy. Compared with the traditional nylon 6 / nylon 66, the cross-linked nylon 6 / nylon 66 prepared by the invention has the advantages that the temperature resistance and the flame retardance are improved, the flame retardance can reach the V0 level, the high temperature of 280 DEG C or above can be continuously resisted, and meanwhile, the stability and the ductility are good.

The invention relates to the technical field of composite material manufacturing, in particular to a rubbing-resistant flexible composite material, wherein a flexible anti-aging layer, a bonding layer, a barrier layer, a bonding layer, a buffer layer, a bonding layer, a force bearing layer, a bonding layer and a heat sealing layer are sequentially arranged from outside to inside; the anti-aging layer and the barrier layer, the barrier layer and the buffer layer, the force bearing layer and the heat sealing layer are respectively bonded with a bonding layer, and the layers are compounded through laminating compounding into an integrated material; both the buffer layer and the heat sealing layer are made of thermoplastic polyurethane films, and are bonded with the force bearing layer and thebarrier layer by using a polyurethane adhesive, the thickness is 12-25 microns, certain barrier performance is achieved, meanwhile, rubbing of external force on the barrier layer and the anti-aging layer can be buffered through the self flexibility, a capsule material is protected, and penetrating pinholes do not appear after the capsule material is rubbed for 300 times.

The invention discloses an oil-stain-resistant ceramic sheet, which is prepared from the following raw materials in parts by weight: 20 to 30 parts of mullite, 10 to 20 parts of cordierite, 5 to 10 parts of talcum powder, 4 to 6 parts of fiber-reinforced graphene, 2 to 6 parts of wollastonite hybrid modified alpha-aluminum oxide, 1 to 3 parts of silicon nitride composite nano powder and 1 to 5 parts of barium carbonate sintering aids. The oil-stain-resistant ceramic sheet is composed of mullite, cordierite, talcum powder and other raw materials, and the prepared product is resistant to oil stain and excellent in strength performance through the composite proportion of fiber-reinforced graphene, wollastonite hybrid modified alpha-aluminum oxide and silicon nitride composite nano powder.

The invention relates to a stop valve. The stop valve comprises a valve body, and the upper top of the valve body is connected with a liquid inlet; a liquid outlet is formed opposite to the liquid inlet, and the top ends of the liquid inlet and the liquid outlet are provided with reinforcing plates; the reinforcing plates are provided with installing holes; the communicating position of the liquidinlet and the liquid outlet is provided with a buffering plate which is provided with small holes; the small holes are connected with a filter screen; the upper side of the liquid inlet is connectedwith a hole frame which is provided with a communicating hole; the communicating hole is provided with a silencer; the top of the hole frame is connected with a flexible graphite sealing ring which isconnected with a filler cavity; the lower end of the filler cavity is connected with a plunger; a sealing ring is arranged at the bottom of the plunger and is connected with a buffering device; the upper end of the filler cavity is connected with a valve rod, a spacer is used for isolation, and the two ends of the bottom of the valve rod are provided with limiting pins; a column nut is used for fixing, and the upper side of the valve rod is connected with an inlet of a valve deck; an abrasion-resistant plate is welded to the inlet of the valve deck and is provided with an O-shaped sealing ring; and the abrasion-resistant plate is connected with a cap nut. The stop valve is good in sealing performance, high in anti-impacting force, good in buffering performance, high in stability, resistant to abrasion, corrosion-proof and resistant to high temperature, and long in service life.

The invention discloses a high-resistant and high-contractive film using polyvinyl alcohol as the middle layer and its making method. The structure of the film is 3-7 layers, and the three-layer structure is PO / PVA / PO, the five-layer structure is PO / glue / PVA / glue / PO, and the seven-layer structure is PO / glue / PA / PVA / PA / glue / PO or PO / glue / PVA / PVA / PVA / glue / PO. The invention adopts the high-molecular material and degraded PVA resin as the obstructing layer. The said PVA resin is the polyvinyl alcohol of the middle layer, PO is polyolefin resin, and PA is polyamide, the glue is the bond. The making method adopt a plurality of plasitification coextrusion machines to implement. Put the materials of each layer into the extrusion machine, pass through coextrusion head, upper cool winding, the draught, the heating and synchronous double-directional extension to get the product. The invention is suitable for the packaging films of various goods and can replace the PVD and ethylene-ethenol polymer.