43 results about "ECTFE" patented technology

A process for fluoro-oxidation of the surface(s) of an ECTFE substrate, film or three-dimensional object, and the surface-modified substrate, film or object produced thereby. The process includes exposing the surface(s) to concentrations of fluorine and oxygen for a time sufficient to increase the surface energy and thereby lower the surface contact angle sufficiently to permit bonding. The surface modification allows bonding to an adhesive with the adhesive being bondable to a plastic or metal substrate.

In one embodiment, there is a method for storing fluids in a bag that has an inner lining that is essentially sterilized and essentially free of pyrogen. The method comprises heating the bag that is comprised of a polymeric film to at least approximately 253° Celsius. The polymeric film includes a polymer selected from the group of poly(oxy-1,4-phenylene-oxy-1,4-phenylene-carbonyl-1,4-phenylene) (PEEK); polytetrafluoroethylene (PTFE); a perfluoroalkoxy (PFA) polymer; poly(tetrafluoroethylene-co-perfluoromethyl vinyl ether) (MFA); polyperfluoro(ethylene-co-propylene) (FEP); poly(ethylene-alt-chlorotrifluoroethylene) (ECTFE); poly(ethylene-co-tetrafluoroethylene) (ETFE); poly(vinylidene fluoride) (PDVF); tetrafluoroethylene-co-hexafluoropropylene-co-vinylidene fluoride terpolymer (THV); ultra-high molecular weight polyethylene (UHMW PE); (poly(bisphenol A-co-4-nitrophthalic anhydride-co-1,3-phenylenediamine) (PEI); poly(4-methyl-1-pentene) (PMP); and suitable mixtures thereof.

The invention describes coextruded multi-layer films comprising a first fluoropolymer layer; a second layer comprising a glycidyl acrylate or glycidyl methacrylate or mixtures thereof adhered to the first layer; and a third layer comprising a polyester or polycarbonate adhered to the second layer.

Provided is a member for electrophotography, where an elastic layer including a silicone rubber and a release layer including a fluorine resin are bonded sufficiently without any adhesive layer interposed therebetween.

The member for electrophotography includes a substrate; an elastic layer including a silicone rubber, on the substrate; and a release layer provided in direct contact with the surface of the elastic layer, where the release layer includes a fluorine resin selected from the group consisting of PFA, FEP, PTFE, ETFE, PCTFE, ECTFE, and PVDF, and the elastic layer undergoes a cohesive failure when the release layer is peeled from the elastic layer in accordance with “Determination of peel strength of bonded assemblies. Part 1: 90 degree peel” specified by the Japanese Industrial Standards (JIS) K 6854-1:1999.

The invention provides a preparation method of a hollow fiber polymer membrane, particularly relates to a membrane filter using the membrane in the process field of brine refining, and belongs to thefield of polymer separation membrane preparation. ECTFE (ethylene-chlorotrifluoroethylene copolymer) is used as a membrane material for preparing the hollow fiber membrane; the hollow fiber membrane is applied to a brine refining process. The average pore diameter of the prepared hollow fiber membrane is 150 to 220nm; the tensile strength is 2.5 to 4.7MPa; the pure water flux at 25 DEG C is 320 to710L/(m2.h.bar). The ECTFE, a diluent and an inorganic additive are proportionally mixed; heating dissolving is performed; a prepared casting membrane solution is spun into a hollow fiber shape by aspinning machine; then, quenching is performed; the prepared membrane silk is firstly subjected to acid pickling; then, the diluent is extracted by a proper solvent; drying is performed to obtain an ECTFE hollow fiber membrane. The hydrophilicity of the membrane prepared by the method is improved; the tensile strength is high; the pure water flux of the membrane is great; the pore diameter is concentrated; the pollution resistant performance is good; a good application effect is realized in the brine refining process.

The invention provides a high-throughput polymer separation membrane, a preparation method, a diluent composition and an application, and belongs to the technical field of preparation of polymer separation membranes. The invention relates to a method for preparing an ECTFE porous membrane by adopting a two-element diluent through a thermally-induced phase separation method. The method comprises the following steps: with 15 to 70 wt% of an ECTFE polymer and two solvents with a total mass percentage of 30 to 85 wt% as the two-element diluent for preparation of a membrane casting solution, subjecting the ECTFE polymer and two solvents to heating under stirring and carrying out standing and defoaming, or mixing the ECTFE polymer and two solvents through a double screw extruder so as to preparea polymer homogeneous membrane casting solution; scraping the casting solution into a plate shape or into a hollow fiber shape through spinning of a spinning nozzle, then carrying out soaking in a cooling liquid, carrying out quenching, and carrying out curing so as to form a membrane; and soaking the formed film into an extractant, allowing the diluent to be extracted out of the formed membrane,and carrying out drying in the air so as to prepare the ECTFE porous membrane. The invention is characterized by adopting two environment-friendly solvents as the two-element diluent for preparationof the ECTFE porous membrane; the preparation process is simple and has green and environment-friendly process; and the ECTFE porous membrane prepared by using the preparation process provided by theinvention has large throughput which is improved by 1.5 times or above compared with the throughput of the ECTFE porous membrane prepared by using a single diluent.

The present invention provides an ethylene-chlorotrifluor ethylene copolymer microporous separation membrane. A multiphase blend system composed of polymer ethylene-chlorotrifluor ethylene, a heat stabilizer and diluent is used as the membrane forming system, and the ECTFE microporous separation membrane is prepared by thermally induced phase separation (TIPS). The membrane possessed both high strength and high throughput characteristics. In the process of preparation, the waste liquor pollution is less, the preparation cost is low and the environmental protection performance is good. The invention also provides a preparation method of the ethylene-chlorotrifluor ethylene copolymer microporous separation membrane. The prepared ethylene-chlorotrifluor ethylene copolymer microporous separation membrane is suitable for zero discharge of high concentration wastewater from textile and dyeing industries, recovery of organic solvents and alkali liquor, filtration of etchant in microelectronics industry, separation and purification of antibiotics, decolorization of syrup, membrane distillation and water vapor separation.

The invention discloses an anti-corrosion sedimentation tank and a building method thereof. A tank body is made of glass fiber reinforced plastics, so the anti-corrosion problem is solved; and a support frame, a support tank body, a raking machine arranged in the tank body and a driving device driving the raking machine to operate are made of carbon steel, so the problem that the tank body has poor rigidity and can not support the raking machine to normally work is solved. The raking machine is a carbon steel welding element, in addition, ethylene-chlorotrifluoroethylene copolymer (ECTFE) anti-corrosion coatings with the thickness not less than 1.5mm are integrally sprayed and coated on the surface of the raking machine, the intensity requirement of the raking machine is met, and the anti-corrosion problem of the raking machine is also solved. A scraping plate is covered by more than 8.5mm of glass fiber wires or cloth, and the coatings on the scraping plate are prevented from being damaged when the scraping plate is used for scraping materials settled at the bottom of the tank body. The anti-corrosion problem of the sedimentation tank is perfectly solved, simultaneously, the work stability of the sedimentation tank is also ensured, and the production requirement of the electrolysis industry is met. The anti-corrosion sedimentation tank has the advantages that the structure is compact, the operation is stable, the sedimentation effect is good, economy and practicability are realized, and the like.

The invention discloses a high-temperature-resistant colored fluororesin film, a preparation method and application thereof. The film is prepared through blending and melt extrusion of fluororesin and fluororesin color master batch, the film is formed through curtain coating, the fluororesin is a mixture selected from any one or more than any two of FEP, ETFE or ECTFE and PFA, the fluororesin color master batch is obtained by blending 30% to 50% of an organic pigment, 45% to 65% of fluororesin and 5% to 10% of a dispersing agent according to the percentages accounting for total weight of the color master batch for 20 to 50 minutes and pelleting, and the processing temperature is 350 to 400 DEG C. According to the method provided by the invention, the fluororesin and the fluororesin color master batch are easily and sufficiently mixed, the film can be formed through curtain coating and extrusion as long as a small amount of a lubricating agent is needed, and the prepared colored film can be resistant to high temperature and can be used for release films in the manufacturing process of aircraft wings in the field of aerospace.

The invention discloses ECTFE (ethylene-chlorotrifluoroethylene copolymer) resin with a self-crosslinking structure. A preparation monomer comprises ethylene, chlorotrifluoroethylene, alkoxy methyl (alkyl) acrylamide and a modified monomer A; the molar ratio of the ethylene to the chlorotrifluoroethylene to the alkoxy methyl (alkyl) acrylamide to the modified monomer A is (40-60):(60-40):(0.1-10):(0-5). The ECTFE resin provided by the invention can serve as a corrosion-resistant coating after being subjected to self-crosslinking solidification through heat treatment, and is particularly applicable to the field of chemical anticorrosion.

The invention relates to a fluorocarbon powder coating for automobile chassis. The fluorocarbon powder coating comprises the following components in percentage by mass: 15-25% of ECTFE fluorocarbon resin, 30-50% of weather resistant polyester resin, 15-25% of nanometer titanium dioxide, 3-5% of cross-linking agent, 0.5-1% of leveling agent, 0.5-1% of light enhancing agent, 3-10% of barium sulfate,0.2-0.8% of pigment, 5-15% of nanometer silica micro powder, 0.3-0.5% of wax powder, and 0.1-0.3% of benzoin. The invention also provides a preparation method of the fluorocarbon powder coating for automobile chassis. The fluorocarbon powder coating for automobile chassis can effectively improve a painting appearance effect, and has higher chemical corrosion resistance and long service life, andthe preparation method of the powder coating is simple and easy to operate, therefore, the fluorocarbon powder coating is suitable for wide application and promotion.

Embodiments of the invention provide a preparation method of vinyl-trifluorochlor oethylene copolymer hollow fiber porous membrane for the membrane chemical reactor process. The preparation method comprises the following steps: (1) adding vinyl-trifluorochlor oethylene copolymer powder and a compound diluting agent into a melting device, melting, plasticizing, and obtaining a casting membrane solution; (2) extruding the casting membrane solution by virtue of a spinning nozzle, quenching in a gel bath at 0 to 50 DEG C, and obtaining a primary hollow fiber porous membrane; and (3) extracting a diluting agent in the primary hollow fiber porous membrane by using an extraction agent, and obtaining a hollow fiber porous membrane. The preparation method of the vinyl-trifluorochlor oethylene copolymer hollow fiber porous membrane provided by embodiments of the invention is simple in process; and by adjusting the type and proportion of the compound diluting agent as well as the technological parameters of the preparation process, the vinyl-trifluorochlor oethylene copolymer hollow fiber porous membrane with small aperture, high porosity and/or high strength can be obtained.

An irradiation crosslinking modified ECTFE (ethylene chlorotrifluoroethylene) heat shrinkable sleeve comprises, by weight, 60-90 parts of ECTFE resin, 10-30 parts of FFKM rubber elastomers, 0.1-2.0 parts of antioxidants, 0.5-5 parts of acid absorbers, 3-20 parts of color masterbatches and 1-6 parts of lubricants. The irradiation crosslinking modified ECTFE heat shrinkable sleeve has outstanding properties of resistance to high temperature, oil, chemical solvents, ageing, mechanical damage and corrosion, can meet requirements for long-term use at the temperature of minus 55 DEG C to 200 DEG C, and can be applicable to the fields such as military projects, automobiles, ships, high-speed trains and aerospace.

A process of slowing down diffusion of an element or a compound through a fluoroplastic comprising the addition of a reactive additive having reactive groups that react with the element or compound. A process of preventing degradation of the fluoroplastics PVDF and ECTFE used in, or in connection with a reactor where chlorine dioxide is produced comprising mixing the fluoroplastic with a reactive additive having reactive groups. A diffusion resistant fluoroplastic which comprises a reactive additive having reactive groups that react with an element and/or compound to which the fluoroplastic is diffusion resistant. The use of a reactive additive having reactive groups as an additive in a fluoroplastic to prevent or slow down the diffusion of an element or a compound through the fluoroplastic. The use of a reactive additive having reactive groups as an additive in the fluoroplastics PVDF and ECTFE used in, or in connection with a reactor for producing chlorine dioxide to prevent or slow down degradation of the fluoroplastic.

Provided is an electrophtographic member wherein an elastic layer containing a silicone rubber is sufficiently adhered to a mold-release layer containing a fluororesin without via any adhesive layer. The electrophtographic member comprises a base material, an elastic layer containing a silicone rubber that is disposed on the base material, and a mold-release layer that is provided on the surface of the elastic layer directly in contact therewith, wherein: the mold-release layer contains a fluororesin selected from the group consisting of PFA, FEP, PTFE, ETFE, PCTFE, ECTFE and PVDF; and the elastic layer undergoes cohesive failure in a 90degree peel bond strength test in accordance with Japanese Industrial Standards (JIS) K 6854-1:1999.

The invention discloses an ECTFE melt-blown film and a preparation method thereof. The melt-blown film is composed of superfine fibers with the diameter of 0.1 [mu] m-5 [mu] m; and the aperture of at least 60% of the melt-blown film is 0.3 [mu] m-0. 7 [mu] m, the aperture of less than 20% of the melt-blown film is 0.1 [mu] m-0. 3 [mu] m, and the aperture of less than 20% of the melt-blown film is 0.7 [mu] m-1. 0 [mu] m. The melt-blown film disclosed by the invention has the advantages of high tensile strength, high elongation at break, small average pore size, high filtering precision, suitability for high-temperature-resistant, acid-base-resistant and corrosion-resistant environments and the like.