2275 results about "Nylon 6" patented technology

A lead-free, composite polymer based bullet and cartridge case and methods of manufacturing the same, wherein the composite polymer material includes a tungsten metal powder, nylon 6/6, nylon 6, short glass fibers, as well as additives and stabilizers. The cartridge case includes a lip lock configured to matingly engage a cannelure formed along an outer circumferential surface of the bullet. The cartridge case also includes resilient walls wherein the case may snap fit onto the bullet. The bullet and cartridge case may be formed in a single step process by injection molding or a two step process including injection molding and a welding process.

The invention relates a nylon 6 polymerization method and a direct spinning method of a melt of a polymer obtained with the nylon 6 polymerization method. A polyamide 6 prepolymer is prepared at the low temperature, the content of oligomers in the melt is controlled in advance, polymerization is completed before a large quantity of cyclic oligomers are generated with a condensation polymerization dynamic strengthening method, a nylon 6 polymer melt with certain molecular weight is acquired, the content of extracts in the product is smaller than or equal to 1.5 wt%, and the content of cyclic dipolymers is smaller than or equal to 0.2wt%; then, direct melt spinning forming is performed after condensation polymerization dynamic strengthening ends. The process is simple, energy consumption is further reduced while the utilization rate of caprolactam is increased, the obtained melt can be directly used for melt spinning, high-capacity large-scale production is easy to realize, a modifier can be added in the polymerization process, flexible production of nylon 6 is realized, and the nylon 6 can be applied to fibers for clothes, industrial filaments, engineering plastics and other fields.

The invention relates to a preparation method of a graphene modified nylon 6 fiber and belongs to the technical field of a functional fiber material. The preparation method comprises the following steps of: carrying out carboxylation and acylating chlorination treatment on graphene; then carrying out diamine treatment to obtain graphene oxide with an active amino on the surface; carrying out polymerization reaction by utilizing the aminated graphene and caprolactam through an initiator 6-aminocaproic acid to prepare a modified nylon 6 melt of the graphene; and carrying out spinning and stretching through a fusion and spinning process to obtain the graphene modified nylon 6 fiber. The technical scheme of the invention utilizes aminated graphene enhanced 6 to improve the interface bonding strength with a base resin, so as to be good for improving the whole performance of the graphene modified nylon 6 fiber. A fiber material prepared by the preparation method provided by the invention can be widely applied to the technical fields of aerospace, cars and ships, communication and transportation, mechano-electronics and the like.

A solid-state detector for detection of neutron and alpha particles detector and methods for manufacturing and use thereof are described. The detector has an active region formed of a polycrystalline semiconductor compound comprising a particulate semiconductor material sensitive to neutron and alpha particles radiation imbedded in a binder. The particulate semiconductor material contains at least one element sensitive to neutron and alpha particles radiation, selected from a group including 10Boron, 6Lithium, 113Cadmium, 157Gadolinium and 199Mercury. The semiconductor compound is sandwiched between an electrode assembly configured to detect the neutron and alpha particles interacting with the bulk of the active region. The binder can be either an organic polymer binder or inorganic binder. The organic polymer binder comprises at least one polymer that can be selected from the group comprising polystyrene, polypropylene, Humiseal™ and Nylon-6. The inorganic binder can be selected from B2O3, PbO/B2O3/, Bi2O3/PbO, Borax glass, Bismuth Borate glass and Boron Oxide based glass.

The invention discloses a halogen free flame retardant nylon 6 composite with high CTI value and a preparation method thereof. The composite comprises the following components by mass percent: 643.5-68.8wt.% of nylon, 10-12wt.% of fire retardant, 7-19wt.% of fire retardant synergetic inorganic packing, 8-12% wt.% of toughening agent, 1-3wt.% of bulking agent, 5-10% wt.% of enhance inorganic filler and 0.2-0.5wt.% of anti-oxygen which are prepared into the compound by a high speed premixing dispersing primary extrusion processing. The disclosed composite has as high as 550V CTI value and UL 94V-0 level excellent fire resistance; simultaneously, the polymer has good mechanical property by a comprehensive modified technique, wherein the tensile strength reaches 70.5Mpa, the bending strength reaches 90.7MPa and the impacting strength of a gap reaches 28.1kJ/m2. The invention solves the problem that the flaming resistant and high CTI value are difficult to satisfy simultaneously; the inventive 6 nylon compound is very suitable for preparing a low-pressure vacuum contactor, a transformer coil framework, a high-temperature resistant relay, a breaker, a high voltage electrical apparatus, a handle and a thin wall electronic and electrical appliance elements, and the like.

The invention relates to a nylon 6/graphene nanometer composite material with high thermal conductivity and a preparation method thereof. The composite material is composed of a nylon 6 matrix and nanometer graphene and is prepared by carrying out in situ polymerization and melt blending and banburying on obtained master batches and pure nylon 6. The nanometer graphene oxide adopted in the preparation method has a high radius-thickness ratio, a small amount of nanometer graphene oxide is added and is thermally reduced to form heat-conducting master batches, and an effective graphene heat conducting path can be formed effectively in the nylon 6. The small amount of nanometer graphene oxide heat conducting fillers and the master batches are added into the pure nylon 6 to be mixed and compounded so as to keep the good mechanical properties of the nylon 6 in the heat-conducting composite material. The nylon 6/graphene nanometer composite material with high thermal conductivity, provided by the invention, is excellent in heat conducting property, simple in preparation process and low in cost, thereby being capable of being widely applied in the field of heat dissipation of automobiles, computers, LEDs (Light Emitting Diode), etc.

The invention discloses a high-fluidity halogen-free flame retardant reinforced nylon composite material and a preparation method thereof. According to the invention, high-fluidity nylon resin containing chain structural nylon 6 is adopted as matrix resin; 4.9 to 29.5 parts of halogen-free flame retardant and 0.1 to 0.5 part of antioxidant are added in a mixing machine for evenly mixing; the obtained mixture is melted and extruded through a screw extruder; a reinforcement component is added in the extruding process; and finally, a novel halogen-free flame retardant reinforced nylon composite material of the high-fluidity halogen-free flame retardant reinforced nylon composite material is obtained through drawing, cooling and pelletizing. The flame retardant reinforced nylon composite material has the characteristics of high melt fluidity, good environmental friendliness and flame retardance, good electric performance, excellent mechanical performance and the like; and obtained products have excellent surface performance, low warpage and high smoothness. The material can be widely applied in the field of electric plastic parts, such as casings, breakers, wire connection boxes, socket switches and the like of semiconductor devices such as IGBT (Insulated Gate Bipolar Transistor) and the like.

This invention relates to the laminated material for food packaging, and its manufacturing process. The laminated material (10) consists of the quality keeping intermediate layer (12) laminated inside the paper core layer (11) and the core layer and the heat sealable innermost layer (13). The quality keeping intermediate layer comprises of an extrusion coatable blend polymer consisting of polymer component A 50-95% of nylon-MXD6 or EVOH and, polymer component B 5-50% of nylon 6, nylon 6, the blends or PET. The quality keeping intermediate layer is extruded and laminated directly in the core layer, the innermost layer contains at least the linear low density polyethylene which has a narrow molecular weight distribution, and has the properties parameter of mean density of 0.910-0.925, 100-122 degrees C. peak melting point, melt flow index of 5-20, swelling ratio (SR) of 1.4-1.6, and 5-50 micrometer layer thickness.

The hardness, production efficiency, and cost performance of the barrier packaging container formed by the packaging material are improved.

The invention relates to glass fiber reinforcing nylon 6-polypropylene alloy material. The invention is characterized in that the invention adopts nylon 6 and polypropylene as the matrix resin, and under the condition that the addition level of plasticizer is not changed, the invention can achieve and is preferable to the mechanical property of the unilateral enforced nylon 6 material without polypropylene added, in particular to the impact property. The matrix resin, the plasticizer as well as the antioxidant are evenly mixed and then enter into a double screw extruder, simultaneously glass fiber is added from the special glass fiber opening of the double screw extruder, and the matrix resin, the plasticizer, the antioxidant and the glass fiber are cooled, dried and palletized to be produced into finished products after being mixed together and extruded. The invention has the advantages that the plasticizer can be self made, the cost of the alloy material is low, the invention has good impact property, and the other mechanical properties are kept unchanged basically.

The invention discloses a processing method of a high-strength low-shrinkage nylon 6 fine denier filament, belonging to the technical field of nylon filament processing. The method comprises the following steps: preparing materials: adding the nylon 6 slices into a bin of nitrogen protective gas to obtain a material to be melted; melting: introducing the material to be melted into a screw extruder for melting to obtain a melt; forming: introducing the melt from the upper part of a spinning box, and ejecting from a spinneret orifice of a spinneret plate to obtain a filament bundle; cooling: introducing the filament bundle into a slow-cooling area for slow cooling, forming through side-blowing air cooling, and further cooling through a channel; oiling and pre-interlacing: oiling the cooling-formed filament bundle through an oil lip or oil wheel, and pre-interlacing; drafting: feeding the filament bundle to be drafted through a feeding roller, drafting through a heat roller, and then performing relax-type setting to obtain the drafting-set filament; and re-interlacing and re-oiling: re-interlacing and re-oiling the drafting-set filament before packaging to obtain the high-strength low-shrinkage nylon 6 fine denier filament. The method can adapt to different purposes of products, and can be applied to the occasions having rigorous requirements on the breaking strength and dry heat shrinkage.

The invention discloses a low-smell toughening polyamide (PA)6 material. The low-smell tougheningPA6 material comprises the following raw materials in part by weight: 60 to 95 parts of nylon 6 resin, 5 to 40 parts of polyolefin, 0.5 to 5 parts of maleic anhydride, 0.1 to 0.5 part of peroxide and 0.2 to 5 parts of other additive. By the preparation method, the processing step of preparing toughening polyamide (PA)6 material is simplified, namely the primary two steps are combined into one step, and the preparation of the toughening polyamide (PA)6 material is realized by controlling a processing temperature. The production cost is reduced by the method; the prepared toughening polyamide (PA)6 material is excellent in performance and low in smell, has a certain practicability and commercial value and can be applied in fields, such as vehicles, electronics/electrical appliances and the like.

The invention discloses a high-flowability polyamide halogen-free flame-retardant heat-conducting composite material and a preparation method thereof. A novel halogen-free flame-retardant heat-conducting composite material is prepared by using high-flowability nylon 6 resin with a branch chain structure as a base body, adding additives such as heat-conducting fillers, a halogen-free flame retardant, an antioxidant and a coupler, and preparing the material through a double-screw melt blending technology. The halogen-free flame-retardant heat-conducting composite material has the characteristics of good heat conductivity, high melt flowability, good environment-friendly and flame-retardant performances, excellent insulation and mechanical comprehensive performances and the like; an obtained product is high in heat-radiating speed, high in strength, low in warping degree and resistant to high temperature and ageing; the composite material can be widely applied to the field of electric plastic parts with higher heat-radiating requirements such as locomotive compartment illumination lamp covers, auto and civil LED heat radiators, household appliance motor shells, notebook power, micro-projector shells, transformer coil frameworks and the like.

The invention discloses a high heat conducting nylon composite material and a preparation method thereof. The high heat conducting nylon composite material belongs to one of functional high molecules. The composite material is prepared from a thermoplastic nylon resin base body, heat conducting filler and other processing agents. The heat conducting coefficient is greater than 2.7W/m.K. The resin base body can be nylon 6 or a compound of nylon 6, nylon 9, nylon 66, nylon 610 and nylon 1010. The heat conducting filler can be one or more of magnesium oxide, aluminum oxide, aluminum nitride, boron nitride, silicon nitride, a multiwalled carbon nanotube and a graphite flake layer. The processing agents can be octadecanamide, polyethylene wax, liquid paraffin and the like. The method disclosed by the invention is simple to operate and low in cost, and can prepare the heat conducting composite material with excellent comprehensive performance by one step. The method is easy to realize industrialized production and can be widely applied to the fields of automobiles, household appliances, meter cases, circuit elements and the like.

The invention relates to a heat-conducting, wear-resistant and insulated nylon 6 composite material and a preparation method thereof. The material is composed of the following raw materials in percentage by weight: 20-50% of PA 6, 10-30% of fibrous heat-conducting fillers, 15-30% of insulated heat-conducting powder A, 5-10% of insulated heat-conducting powder B, 5-15% of heat-conducting wear-resistant powder, 0.75-1.5% of coupling agent, 3-10% of compatibilizer, 0.2-0.5% of antioxidant and 0.2-0.5% of lubricant. According to the heat-conducting, wear-resistant and insulated nylon 6 composite material provided by the invention, heat-conducting fillers with different particle sizes, different shapes and different draw ratios are compounded so that the fillers are more uniformly distributed in a plastic matrix so as to form a heat-conducting network more easily. Since a low-feeding high-shearing extrusion process is used in the invention, an extruder is at a hungry state to achieve an effect of dispersing the fillers more uniformly. When the fibrous heat conducting fillers are added, a single screw extruder is used, so that the fibers can be sheared into smaller size, the damage is smaller, and meanwhile, the fillers are dispersed more uniformly by extruding the fillers by the extruder for the second time; and the heat-conducting, wear-resistant and insulated nylon 6 composite material provided by the invention has the advantages of good heat conducting effect, excellent wear resistance, easy workability, etc.

The invention discloses a warpage resistance nylon 6 composite material for a vehicle air conditioning air door and a preparation method thereof. The composite material is composed of nylon 6 chips, fiberglass, glass microballoons, compatilizer, antioxidizer, a coupling agent and a lubricating agent. The preparation method includes the following steps: (1) after being uniformly mixed, the nylon 6 chips, the compatilizer, the antioxidizer, the coupling agent and the lubricating agent are added into a double screw extruder on the first segment of a barrel, the glass microballoons are added by a side feeding machine on the fourth segment of the barrel, and the fiberglass is added by the side feeding machine on the sixth segment of the barrel; and (2) after being extruded outside, the prepared particles are dried and cooled, and finally the warpage resistance nylon 6 composite material for the vehicle air conditioning air door can be obtained. The warpage resistance nylon 6 composite material prepared by the invention has the advantages of extremely high flexural modulus, high fluidity and favorable dimension stability, solves the problem of warpage of a large finished piece caused by material shrinkage, and guarantees the assembly of the finished piece.

The invention relates to a method for preparing a nylon 6/graphite oxide nanocomposite. In the method, caprolactam is adopted for in situ hydrolysis and ring-opening polymerization to prepare the nylon 6/graphite oxide nanocomposite, so that caprolactam monomers are easy to perform in-situ intercalative polymerization to dissociate a graphite oxide lamella, and the dispersing uniformity of the graphite oxide lamella in a polymer substrate is improved; and the composite prepared has better conductivity and high-efficiency flame retardancy. The nylon 6 substrate is converted from an insulator to a semiconductor and the flame retardant rating can reach V-0 rating of a UL94 standard, and the integral good mechanical property of the material per se is maintained simultaneously. The method has the advantage of simple and effective process; the conductivity and flame retardancy of the obtained composite are obviously improved; the material has good secondary-working character; an additive graphite oxide does not pollute the environment; and the nylon 6/graphite oxide nanocomposite has wide application range.

The invention discloses a high strengthening and toughening type polyphenylene sulfide composite material. 100 wt% of the composite material comprises 45-55 wt% of polyphenylene sulfide resin, 30-50 wt% of glass fibers, 4-8 wt% of a toughening agent, 0.4-1.0 wt% of a compatibilizer and 0.1-3 wt% of other additives; the surface of the glass fibers is impregnated with a silane coupling agent; the toughening agent is at least one selected from nylon 6, nylon 66, ethylene-methyl acrylate-glycidyl methacrylate and a maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer elastomer; and the compatibilizer is selected from epoxy resins. The polyphenylene sulfide composite material disclosed in the invention has the advantage of high rigidity, high toughness and high flame retardation property, is especially suitable for producing small parts and ultrathin parts which have high requirements for the impact performance, and greatly broadens the application range of a phenyl sulfide material.

The invention discloses a graphene/nylon 6 fiber with flame-retarding and ultraviolet-proof properties and a preparation method of the graphene/nylon 6 fiber and belongs to the technical field of functional high molecular materials. The graphene/nylon 6 fiber with the flame-retarding and ultraviolet-proof properties is prepared through high-speed melting spinning of a graphene/nylon 6 nano composite material; the graphene/nylon 6 nano composite material is prepared by compounding modified graphene, caprolactam and various auxiliary agents. The graphene/nylon 6 nano composite material obtained by the invention can continuously pass through a melting spinning hole at a high speed and continuous high-speed spinning is realized; the diameter of the fiber is 5mum to 50mum; compared with a pure nylon 6 fiber, the prepared graphene modified nylon 6 fiber has excellent flame-retarding, melt-dripping-resisting and ultraviolet-proof performances and the like.