32results about How to "Improve nodule strength" patented technology

The invention discloses a preparation method of an ultrahigh molecular weight polyethylene monofilament knotted fishing net. The preparation method comprises the following steps: performing melted extrusion on ultrahigh molecular weight polyethylene raw materials by using an extruding machine; cooling the extruded melt and pre-stretching the melt under the action of a drawing roller; putting initial raw filaments which are formed by cooling into a stretching machine to be subjected to three-stage stretching so as to prepare ultrahigh molecular weight polyethylene monofilaments; reeling monofilament fiber on a reeling machine; weaving the reeled monofilaments into a fishing net on a knotted net weaving machine; performing follow-up treatment and other steps on the woven fishing net, wherein nanometer molybdenum disulfide and nano-graphite are added into the ultrahigh molecular weight polyethylene raw materials. According to the preparation method, the process flow is short; the fiber processing cost is low; the prepared ultrahigh molecular weight polyethylene monofilament knotted fishing net can effectively resist impact of wind wave and large predators, prolongs the service life of meshes and reduces the attached amount of marine organisms.

The present invention addresses the problem of providing polyolefin fiber that can be easily deformed against stress applied in the direction perpendicular to the fiber axis, has reduced fibrillation,and has excellent knot strength, and in particular, core-sheath composite polypropylene fiber. The problem of the present invention can be solved by having polyolefin fiber with which the compressivestrength, as calculated with formula 1, when compressively deformed by 30% relative to the fiber diameter in the direction perpendicular to the fiber axis in a single fiber is 30 to 51 MPa. St=2P / (Pi*L*d) (Formula 1) St: compressive strength (MPa), P: test force (N), d: single fiber diameter (mm), L: indenter diameter (mm)

Disclosed is a knotted net for marine fishery. The knotted net for marine fishery is characterized in that UHMWPE powder, HDPE powder, a silver-supported nano-silica antimicrobial agent, hydroxystearic acid, silicone powder, an antioxidant B225, nanoscale white carbon black, an antioxidant aid DLTP, a vinyl-vinyl acetate copolymer, nanoscale diatomite and turpentine are premixed and then poured into a high-speed kneading pot to be subjected to high-speed kneading, and a modified UHMWPE composite is obtained; the modified UHMWPE composite is subjected to melt extrusion through a twin-screw extruder, extrudate is subjected to melt extrusion from spinneret orifices through a metering pump additionally arranged at a twin-screw outlet, extruded spun filaments are cooled and pre-drafted, the pre-drafted filaments are subjected to heat setting, and then melt-spun filament bundles are taken up through a filament take-up machine of a torque motor; the melt-spun filament bundles are subjected to primary twisting through a stranding machine, and then Z-twisting-direction strands are obtained; every three Z-twisting-direction strands are processed into an S-twisting-direction three-strand net line with the twisting pitch of 24 mm through a three-strand rope twisting machine, and the three-strand net lines are knitted into the knotted net for marine fishery through a single-hook netting machine.

The invention provides a preparation method of a light sky blue long-acting antifouling net containing grafted polyguanidine salt, comprising preparation of light sky blue masterbatch, preparation of light sky blue modified HDPE compound, melt spinning, drawing and heating There are five steps in shaping and preparing long-lasting anti-fouling nets. First, use 5000S high-density polyethylene resin, ultramarine blue pigment and A‑101 titanium dioxide as raw materials to process light sky blue masterbatch; then L501 HDPE resin, grafted polyguanidine salt / polyethylene pellets, stearic acid Zinc, antioxidant KY‑7910, turpentine, and light sky blue masterbatch are mixed and modified, and then drawn to obtain light sky blue long-lasting antifouling tow; finally, light sky blue long-lasting antifouling is obtained through a specific spinning process The light sky blue long-lasting antifouling net containing grafted polyguanidine salt is obtained through a specific net weaving process. The mesh breaking strength of the long-lasting anti-fouling net prepared by the long-lasting anti-fouling mesh meets the qualified product index of GB / T 18673, and is 17.9% higher than the normal PE mesh qualified product.

The invention discloses a processing method for antifouling melt spinning for a far-reaching-sea net cage or a floating-rope surrounding net. The processing method is characterized by including the steps that UHMWPE powder, nanometer Cu powder, HDPE powder, silicone powder, antioxidant B225, assistant antioxidant DLTP, hydroxy stearic acid, nanoscale white carbon black, nanoscale kieselguhr, nanoscale aedelforsite, ethylene-vinyl acetate copolymer and turpentine assistant are weighed in the formula, then premixed to be poured into a high-speed kneading pot and subjected to high-speed kneading, and a blending-modification UHMWPE material is obtained; the blending-modification UHMWPE material is belted and extruded through a double-screw extruder, the extruded substance is metered through a metering pump additionally arranged through a double-screw outlet and belted and extruded through a spinneret hole, the extruded primary raw silk is cooled and pre-drafted, the pre-drafted silk is subjected to heat setting, then tows are winded through a silk winding machine of a torque motor, and are subjected to silk dividing through a silk dividing machine, and the antifouling melt spinning for the far-reaching-sea net cage or the floating-rope surrounding net is obtained.

The invention provides a manufacturing method of fibers of breeding nets of sea fish. The manufacturing method adopts HDPE (high-density polyethylene) resin, an auxiliary agent, metallocene LLDPE (linear low density polyethylene) resin, a stirring machine, a single-screw extrusion machine, a twice-drawing electrical heating drawing machine, a silk collecting machine and a silk dividing machine. The manufacturing method is characterized in that the HDPE resin is sieved; the adding amount of the auxiliary agent is 0.6% of the weight of the HDPE resin; the adding amount of the metallocene LLDPE resin is 10.3% of the weight of the HDPE resin; the materials are stirred by the stirring machine for 19-31 minutes, so that the materials are uniformly stirred, and a mixture of the HDPE resin and the metallocene LLDPE resin is obtained; melt extrusion is performed on the mixture of the HDPE resin and the metallocene LLDPE resin by the single-screw extrusion machine, and primary silk obtained from melt extrusion is cooled and pre-drawn by a cooling water box and a first drawing roller; twice hot drawing is performed on the pre-drawn silk, the drawn silk is degreased by a high-pressure airflow, the degreased silk is rapidly cooled, and fiber bundles are collected and rolled by the silk collecting machine; the fiber bundles are divided into the fibers of the breeding nets of the sea fish by the silk dividing machine.

The invention provides a processing method for synergistic antifouling yarn containing grafted polyguanidine salt nano-copper nickel, including three processes of raw material compounding, melt spinning, stretching and heat setting. Ethylene pellets and surface-modified copper-nickel alloy nanoparticles are the main raw materials. Firstly, a composite material with synergistic antifouling effect is obtained, and then a synergistic antifouling wire is obtained after a wire drawing process. The synergistic antifouling silk performs targeted synergistic antifouling treatment on algae, barnacles and other fouling organisms in actual breeding production, preventing fouling organisms from adhering to the surface of the netting of the breeding facility, and playing a comprehensive and effective synergetic antifouling treatment. The anti-fouling effect, the sea test results show that the anti-fouling net clothing made of the anti-fouling silk can reduce the fouling biological adhesion by more than 20%, and the synergistic anti-fouling effect is very significant.

The invention discloses a machining method for a steel cable for deep and blue fishery. The method is characterized in that UHMWPE powder, LLDPE powder, nanometer silver-loaded silicon dioxide antibacterial agent, white oil, silicone powder, hydroxystearic acid, antioxidant 1010, nanoscale kieselguhr, nanoscale wollastonite, antioxidant aid DLTP and ethylene-vinyl acetate copolymer are premixed and then poured into a high-speed kneading pot to be kneaded at a high speed, a UHMWPE composite material is melt and extruded through a twin-screw extruder, the extrudate passes through a metering pump additionally arranged on a twin-screw outlet to be melt and extruded from a spinning orifice, the extruded spun filament is cooled and predrawn, the predrawn filament is subjected to heat drawing, a filament rolling machine of a torque motor is used for rolling melt spinning beams after heat setting, a stranding machine is used for carrying out primary twisting on the melt spinning beam to obtain an S-twisted strand, and a three-strand twisting machine is used for processing three S-twisted strands into the Z-twisted three-strand steel cable for deep and blue fishery. The machining method can also be used in oceanographic engineering and trash holding engineering.

The invention relates to a manufacturing method of superstrong-bacterium-inhibiting melt-spun filaments for krill fishery or aquaculture purse seines. The manufacturing method is characterized by including: premixing UHMWPE powder, HDPE powder, nano titanium dioxide silver-loaded antibacterial agent, nano titanium dioxide, hydroxy stearic acid, ethylene-vinyl acetate copolymer, silicone powder, antioxidant 1010, nanoscale diatomite, nanoscale white carbon black, assistant antioxidant DLTP and white oil weighed according to the formula, and pouring into a high-speed kneading pot to perform high-speed kneading to obtain a UHMWPE composite material; extruding the UHMWPE composite material with a double-screw extruder in a melt manner, using a measuring pump mounted at the a double-screw outlet to measure the extruded material, extruding the measured material from a spinneret orifice in a melt manner, cooling and pre-drafting the extruded spun filaments, subjecting the pre-drafted filaments to thermoforming, using a filament collecting machine using a torque motor to wind melt-spun tows; separating the melt-spun tows with a filament separator to obtain the superstrong-bacterium-inhibiting melt-spun filaments for the krill fishery or aquaculture purse seines.

The invention provides a method for manufacturing consumption-reducing and drag-reducing yarns for marine pastures, including three processes of raw material compounding, melt spinning, stretching and heat setting, and POK pellets, zinc stearate, silicone powder, antioxidant , white oil as raw material, first obtain POK composite material, and then through twin-screw extruder extrusion, spinning, drafting, heat setting and splitting, to obtain POK fiber. The POK fiber prepared by the manufacturing method of the consumption-reducing and drag-reducing yarn for ocean ranching has excellent properties such as smooth surface, high strength and wear resistance. The manufacturing method of the invention is simple, the preparation process is low-carbon and environment-friendly, and the production cost can be significantly reduced.