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 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.