34results about How to "Improves stress cracking resistance" patented technology

The invention relates to the technical field of polymer materials, in particular to a PA6 / PC / PBT ternary alloy material and a preparation method of the PA6 / PC / PBT ternary alloy material. The ternary alloy material comprises the following raw materials in parts by weight: 20 to 80 parts of PA6 resin, 10 to 70 parts of PC, 10 to 30 parts of polybutylene terephthalate, 5 to 30 parts of glass fibers, 2 to 15 parts of compatibilizers, 0.1 to 1 part of an antioxidant and 0.1 to 1 part of a lubricant. The PA6 / PC / PBT ternary alloy material disclosed by the invention has high performances of toughness, dimensional stability, corrosion resistance, stress cracking resistance, oil resistance, mechanical strength and the like, and is high in molding performance, excellent in processability, low in cost and high in use value, and the preparation method is simple, convenient to operate and control, stable in quality, high in production efficiency, low in production cost and suitable for large-scale industrial production.

The invention discloses a multilayer co-extrusion cell culture container bag packaging film, which comprises an upper surface layer, a middle layer and a lower surface layer which are sequentially arranged, wherein the upper surface layer, the middle layer and the lower surface layer are modified ethylene-vinyl acetate copolymer layers; the thickness of the upper surface layer is 25 to 35 percent of the total thickness of the film; the thickness of the middle layer is 35 to 45 percent of the total thickness of the film; and the thickness of the lower surface layer is 25 to 35 percent of the total thickness of the film. The multilayer co-extrusion cell culture container bag packaging film is a multilayer co-extrusion packaging film which has a high comprehensive property, particularly a high barrier property and a high sealing property which is suitable for multiple kinds of equipment and various interfaces, and has an extremely high protection property for culture of cellular fluid.

The invention discloses a stress cracking-resistant PC (Polycarbonate) material and a preparation method thereof, and belongs to the technical field of high molecular chemical materials. The technicalpoint is that the stress cracking-resistant PC material is prepared from the following components in parts by mass: 50 to 80 parts of PC, 2 to 25 parts of titanium dioxide, 5 to 20 parts of PET (Polyethylene Terephthalate), 5 to 20 parts of PE (Polyethylene), 0.5 to 2 parts of MBS (Methyl Methacrylate Butadiene Styrene Terpolymer) resin, 0.2 to 0.5 part of diffusing oil, and 0.5 to 3 parts of other auxiliary agents. The preparation method of the stress cracking-resistant PC material comprises the following steps: 1, uniformly mixing the PC, the PE, the PET and 10 to 25 weight percent of the diffusing oil to obtain a premix; 2, adding 75 to 90 weight percent of a premix of the diffusing oil and an antioxidant, and uniformly mixing the premix with the premix which is obtained in the step 1according to the proportion; 3, adding the titanium dioxide, the MBS resin, nano-CaCO3, modified plant fibres / PE composite material, talcum powder and other toners into the mixed materials in proportion; after the materials are mixed, extruding and granulating at 260 to 300 DEG C, and drying the particles for 3 to 5 hours at the temperature of 100 to 120 DEG C to obtain the PC material. Accordingto the stress cracking-resistant PC material and the preparation method thereof, the shading property, the stress cracking resistance, the acid and alkaline resistance, the weather resistance and theimpact strength of the PC material can be improved, which is helpful to prolong the service life of the PC material.

The invention relates to electric-conducting flame-retarding thermoplastic powder, a preparation method and applications of the electric-conducting flame-retarding thermoplastic powder. The electric-conducting flame-retarding thermoplastic powder consists of the following components in percentage by weight: 20-25% of an electric-conducting master batch, 10-15% of a grafted adhesive master batch, 20-30% of a halogen-free flame-retarding master batch and 30-50% of a polyolefin mixture and accessory ingredients. According to the invention, the electric-conducting flame-retarding thermoplastic powder is formed through granulating and grinding the electric-conducting master batch, the flame-retarding master batch, the adhesive master batch and other compositions as well as accessory ingredients of the other compositions through a dual-screw extruder, has a favorable leveling property and a good adhesive force to steel tubes besides the anti-static and flame-retarding characteristics required by the use of an underground coal mine. The electric-conducting flame-retarding thermoplastic powder, the preparation method and applications of the electric-conducting flame-retarding thermoplastic powder, provided by the invention, can be used for coating inner surfaces and outer surfaces of steel tubes, combine the advantages of no rustiness of plastic and high intensity of metal tubular products, and prolong the service life of steel tubes on the basis of meeting the anti-static and flame-retarding characteristics and the like of pipelines used in the coal mine.

The invention discloses an anti-aging ABS-TPU plastic alloy composed of the components of, by weight: 100 parts of ABS, 15-25 parts of TPU, and 0.5-1.5 parts of an anti-aging agent. With the ABS-TPU plastic alloy, TPU stress resistance and cracking resistance are sufficiently improved; stabilities of TPU against oxygen, ozone, and ultraviolet rays can be improved; ABS impact resistance, wearing resistance, and forming and processing performances can be improved. The plastic alloy can be used for producing auto parts, pulleys, low-load gears, and gaskets. The plastic alloy has excellent thermal-aging resistance, and can be applied under extreme-high-temperature environments.

The invention discloses a hexadecafluoro-1-octene modified polyperfluoro ethylene-propylene resin and a solution polymerization preparation method thereof. According to the solution polymerization preparation method, tetrafluoroethylene, hexafluoropropylene and hexadecafluoro-1-octene serve as copolymerizable monomers, wherein a molar fraction of the tetrafluoroethylene to hexafluoropropylene to hexadecafluoro-1-octene is (80-95):(4.9-15):(0.1-5). The preparation process comprises the following steps: adding a fluorine-containing solvent and copolymerizable monomers into a reactor at a certain temperature, raising the temperature to 20-60 DEG C, adding a perfluoro initiator to initiate a polymerization reaction under the pressure of 1.1-1.5MPa, supplementing the copolymerizable monomers in the reaction process, and finally preparing the modified polyperfluoro ethylene-propylene. The modified monomers are taken as polyperfluoro monomers, so that the prepared modified polyperfluoro ethylene-propylene resin is excellent in heat resistance, causes no aggregate dyeing phenomenon, can serve as a high-speed extrusion grade product and can be stably coated on a cable surface at a high speed of 300-500m / min.

A polyethylene resin molding material for a lid of a container for carbonated beverages and the like, which has excellent high speed moldability, high fluidity, stiffness, impact resistance, durability, heat resistance, lubricity, low smelling properties and safety for foods, having good opening properties and sealing properties, and also having improved stress cracking resistance and FNCT fracture properties upon being handled at higher temperatures, and which contains, as the main component, a polyethylene polymer that fulfills the following characteristic properties: (1) the melt flow rate (MFR) at a temperature of 190°C·and a load of 2.16 Kg is not less than 0.8 g / 10 minutes and less than 5.0 g / 10 minutes, the high-load melt flow rate (HLMFR) at a temperature of 190°C and a load of 21.6 Kg is 180 to 400 g / 10 minutes inclusive, and the HLMFR / MFR ratio is 80 to 200; (2) the density is 0.955 to 0.970 g / cm3 inclusive; and (3) a CSD value of a component having a molecular weight of 105 or more is 0.0 to 3.0 as determined based on a measurement value obtained by 13C-NMR spectrometry.

The invention discloses hexadecafluoro-1-octene modified fluorinated ethylene-propylene resin and a bulk polymerization preparation method thereof. The method includes the steps that tetrafluoroethylene, hexafluoropropylene and hexadecafluoro-1-octene serve as comonomers, the comonomers are pre-added into a reactor under a certain temperature, the temperature is increased to 20-60 DEG C, the pressure is 1.1-1.5 MPa, a perfluoro initiator is added to initiate a polymerization reaction, a certain quantity of comonomers are replenished in the reaction process, and modified fluorinated ethylene-propylene is obtained finally. According to the method, the adopted modified monomers are perfluoro monomers, the obtained modified fluorinated ethylene-propylene resin is excellent in heat resistance, granules of the modified fluorinated ethylene-propylene resin are free of color staining, and the modified fluorinated ethylene-propylene resin can serve as a high-speed extrusion-grade product and can be stably smeared on the surface of a cable at the high speed of 300-500 m / min.

The invention relates to the technical field of polymer materials, in particular to a PA6 / PC / PBT ternary alloy material and a preparation method of the PA6 / PC / PBT ternary alloy material. The ternary alloy material comprises the following raw materials in parts by weight: 20 to 80 parts of PA6 resin, 10 to 70 parts of PC, 10 to 30 parts of polybutylene terephthalate, 5 to 30 parts of glass fibers, 2 to 15 parts of compatibilizers, 0.1 to 1 part of an antioxidant and 0.1 to 1 part of a lubricant. The PA6 / PC / PBT ternary alloy material disclosed by the invention has high performances of toughness, dimensional stability, corrosion resistance, stress cracking resistance, oil resistance, mechanical strength and the like, and is high in molding performance, excellent in processability, low in cost and high in use value, and the preparation method is simple, convenient to operate and control, stable in quality, high in production efficiency, low in production cost and suitable for large-scale industrial production.

The invention discloses a transparent and breathable fish tank. The fish tank is assembled by splicing transparent and breathable macromolecular panels. The top of the fish tank is opened, other parts, at least the ornamental side, of the tank body is made from the transparent and breathable macromolecular panels, the transparent and breathable macromolecular panels are provided with continuous cut-through pore ways in the thickness direction, and the continuous cut-through pore ways extend linearly and have the diameters of 0.6 micrometers or below. According to the comparison of the transparent and breathable fish tank and a common fish tank, an oxygenation pump is reduced, the production and operation cost of the fish tank is lowered, and the wholeness and the ornamental value of the fish tank are improved.

The invention relates to a ceramic silicon rubber composite tape with a mica layer and a preparation method thereof. The composite tape has a three-layer structure and is prepared by the following steps: firstly preparing a ceramic silicon rubber sheet, and then preparing a self-adhesive silicone rubber Finally, the surface-treated mica tape is cold-pressed with three layers of ceramicized silicone rubber sheet and self-adhesive silicone rubber sheet, and cross-linked by irradiation to prepare a ceramicized silicone rubber composite tape with a mica layer in the middle. The invention obtains a composite tape with a three-layer structure, which has excellent high temperature resistance, flame retardant performance, mechanical strength and bonding performance, can be widely used in the wire and cable industry, and greatly improves the use safety of the cable.

The invention relates to a cross-linkable ethylene-tetrafluoroethylene copolymer and a synthetic method thereof. A polymer is prepared from tetrafluoroethylene, ethylene, a monomer A and a monomer B through copolymerization, wherein the monomer A is a compound containing one double bond, and the monomer B is a compound containing two double bonds; and by virtue of proper crosslinking, the ethylene-tetrafluoroethylene copolymer can be endowed with relatively high radiation resistance, toughness, abradability, tensile strength and tear strength. The invention further provides a preparation method of the cross-linkable ethylene-tetrafluoroethylene copolymer and a cross-linkable copolymer composition. By controlling a polymerization process, too many low polymers can be reduced, and excellent performance of the polymer can be maintained.

The invention relates to a radiation crosslinking halogen-free flame retardant polyurethane elastomer and a preparation method thereof. The preparation method has the characteristic of being simple in process, and the provided elastomer has excellent technical performance. According to the technical scheme, the radiation crosslinking halogen-free flame retardant polyurethane elastomer comprises the components of thermoplastic polyurethane (TPU) and the like. The preparation method of the radiation crosslinking halogen-free flame retardant polyurethane elastomer is carried out in the following steps of (1) weighing various raw materials; (2) putting the TPU raw material into an oven; (3) putting the dried TPU into a stirrer, and then adding an auxiliary radiation crosslinking material and a sensitizer for stirring; (4) adding other materials to a mixture treated in the step (2), and then stirring and mixing evenly; (5) adding the mixed materials to a twin-screw extruder, extruding and carrying out water cooled pelletizing to obtain the crosslinking halogen-free flame retardant polyurethane elastomer; and (6) forming a finished product and carrying out radiation crosslinking.