CN104862820A - Method for preparing filaments for net weaving - Google Patents

Abstract

The invention provides a method for preparing filaments for net weaving. The method is characterized in that MMWPE (medium molecular weight polyethylene) resin, PP (propene polymer) resin, EPDM (ethylene-propylene-diene monomer) resin and a turpentine auxiliary agent are quantitatively mixed and stirred by a stirring machine until the materials are uniformly stirred and mixed, and an MMWPE/PP/EPDM ternary blending granular material is obtained; the MMWPE/PP/EPDM ternary blending granular material is subjected to melt extrusion through a single screw extruder at a specific temperature, as-spun filaments discharged out of spinneret orifices through melt extrusion are cooled and pre-stretched through low-temperature water in a cooling water tank and a first stretching roller, the pre-stretched filaments are subjected to hot stretching twice through a first high-temperature stretching water bath tank and a second stretching roller as well as a second high-temperature stretching water bath tank and a third stretching roller, and the total stretching multiple is controlled to range from 8.27-8.99, so that a filament winding machine of a torque motor can be used for winding monofilament bundles; the monofilament bundles are separated into filaments for net weaving by a filament separating machine under specific filament separation tension, the filament separation tension is controlled to be 7.9%-9.5% of the monofilament breaking strength, and the filaments for net weaving are obtained.

Description

A kind of knitmesh silk preparation method

Technical field

The present invention relates to seawater to fish for and the preparation method cultivating netting gear knitmesh silk.

Background technology

Fish at seawater and cultivate netting gear technical field people and pay attention to netting gear performance always, and the performance of netting gear depends on performance, etting structure, netting gear equipment technique, the principal element such as net machine type and performance thereof of knitmesh silk.Modern times fish for and the develop rapidly cultivating netting gear technology, new requirement is proposed to the performance of knitmesh silk, people urgently wish to prepare high-performance knitmesh silk, can under the condition of equivalent specifications, improve the performance of etting and shaping netting gear thereof, again can under equal brute force, reduction etting specification realizes seawater and fishes for and cultivate the energy-saving and cost-reducing of netting gear.The art and plastics technology, textile technology field differ greatly, therefore, and all inapplicable the art of preparation method of these technical field wire rods, fiber, bar, sheet material, section bar, tubing.The polyvinyl resin product sold in the market is divided into low molecular weight polyethylene, common molecular weight northylen, medium molecular weight polyvinyl (also known as middle High molecular weight polyethylene) and ultra-high molecular weight polyethylene by the large I of molecular weight.For medium molecular weight polyvinyl resin, in the market Zibo American Standard macromolecular fibre Co., Ltd sell molecular weight be less than 1,000,000 medium molecular weight polyvinyl resin (English is Medium Molecular WeightPolyethylene, referred to as MMWPE), this MMWPE molecular resin amount between 60 ten thousand to 100 ten thousand, melt index is 3.0g/10min, its innovation is used for the processing and fabricating of the materials such as monofilament by people by material new technology.Prior art field knitmesh silk with single common high density polyethylene (HDPE) for raw material, and adopt the processing of conventional melt drawing process, this makes the tensile mechanical properties of output silk poor, the seawater causing silk weaving to become is fished for the water resistance cultivating netting gear large, energy consumption is high, the off line broken fish of severe sea condition escapes accident and happens occasionally, so, knitmesh silk in prior art field is difficult to adapt to modern seawater and fishes for and the need of production cultivating netting gear, people are in the urgent need to a kind of knitmesh silk preparation method, to prepare novel high-performance knitmesh silk new material, but prior art field there is no with MMWPE resin, acrylic resin (being called for short PP resin), ethylene propylene diene rubber (be called for short EPDM resin) is for raw material and adopt a kind of knitmesh silk preparation method of special wire-drawing technology, therefore, a kind of solution of knitmesh silk preparation method problem has become the long-term pendent technical barrier of the art people.A kind of knitmesh silk preparation method to improve knitmesh silk tensile mechanical properties, reduce seawater and fish for the water resistance and the energy consumption that cultivate netting gear, reduce to net and break fish and escape accident occurrence probability, increase seawater and fish for and to fish for the impact resistance cultivating netting gear, power-assisted seawater with to cultivate etting technology upgrading significant.

Summary of the invention

The technical issues that need to address of the present invention are a kind of knitmesh silk preparation methods, with improve knitmesh silk tensile mechanical properties, reduce seawater and fish for the energy consumption cultivating netting gear, increase seawater and fish for the impact resistance cultivating netting gear, advance fishery energy-saving and emission-reduction.

Technical scheme of the present invention adopts MMWPE resin, PP resin, EPDM resin, auxiliary agent, mixer, receive silk machine, devillicate machine, single screw extrusion machine and twice drawing-off electrical heating drawing machine, it is characterized in that MMWPE resin melting index is 3.0g/10min, molecular weight 600,000 ~ 1,000,000, PP resin melting index is 3.0g/10min ~ 4.0g/10min, addition is 31.3% ~ 35.3% of MMWPE weight resin, EPDM resin content is 1.4% ~ 1.6% of MMWPE weight resin, turpentine oil additive dosage is 0.11% ~ 0.15% of MMWPE weight resin, be stirred to till material is all uniformly mixed with mixer, compound is uniformly mixed and obtains MMWPE/PP/EPDM tertiary blending pellet, MMWPE/PP/EPDM tertiary blending pellet melt extrudes at a certain temperature through single screw extrusion machine, specified temp is the 1. district in extruder barrel electrical heating district, 2. district, 3. district, 4. the temperature-control range in district is respectively 302 DEG C ~ 304 DEG C, 334 DEG C ~ 338 DEG C, 339 DEG C ~ 342 DEG C, 345 DEG C ~ 348 DEG C, the spun filament melt extruded from spinneret orifice is cooled and preliminary draft through cooling water tank water at low temperature and the first drawing roller, the water temperature of cooling water tank water at low temperature controls at 25.2 DEG C ~ 34.3 DEG C, spun filament cooling distance controlling is at 746mm ~ 999mm, vertical range in spinnerets and cooling water tank between the water surface controls at 343mm ~ 706mm, preliminary draft silk is through 96.3 DEG C ~ 98.4 DEG C high temperature first drawing-off water baths and the second drawing roller, 96.9 DEG C ~ 99.5 DEG C high temperature second drawing-off water baths and the 3rd drawing roller carry out twice hot gas spring, preliminary draft silk carries out above-mentioned twice hot gas spring by twice drawing-off electrical heating drawing machine, drawing-off general times controls at 8.27 times ~ 8.99 times, to use the receipts silk machine rolling monofilament tow of torque motor, monofilament tow is knitmesh silk through devillicate machine sub-wire under specific point of thread tension, and a point thread tension controls in 7.9% ~ 9.5% of single wire fracture brute force, just obtains a kind of knitmesh silk.

Instant invention overcomes conventional art prejudice, three kinds of resin raw material forming techniques and wire drawing draft process are combined, lot of experiments demonstration is carried out to the technical scheme under different preparation cost, different drafting multiple, different wire-drawing temperature, different proportion raw material addition, has shown that the combination property of the knitmesh silk of output is apparently higher than prior art field knitmesh polyethylene monofilament.Wire drawing of the present invention adopts the MMWPE/PP/EPDM tertiary blending pellet of extraordinary formula, guarantees that a kind of degree of crystallinity of knitmesh silk is high, tensile mechanical properties good; Test and production practices show that a kind of knitmesh silk new material fracture strength that the present invention processes is high, knot strength is high, etting after silk machine-shaping and the good impact resistance of netting gear thereof, not only be applicable to the art knitmesh, but also be applicable to the preparation processing of the art rete cord.The line density prepared as adopted this programme is that the fracture strength of a kind of knitmesh silk new material of 37.7tex is 13% up to 6.88g/D, knot strength up to 4.76g/D, elongation at break, ties strong utilization rate up to 69%, its fracture strength, knot strength respectively more existing polyethylene monofilament standard (SC/T 5005-2014 standard) index improve 16.7%, 16.7%, and its elongation at break meets the art needs completely.The good spinnability of the inventive method product, without fracture of wire phenomenon in suitability for industrialized production.The present invention adds PP resin, EPDM resin, the turpentine oil auxiliary agent of special dosage in MMWPE resin concentrates, be uniformly mixed the rear toughness reinforcing MMWPE/PP/EPDM tertiary blending pellet obtaining extraordinary formula, specific drawing process successfully prepares the art fracture strength and all high a kind of knitmesh silk of knot strength, guaranteeing wire drawing smoothly simultaneously, improve the fracture strength of knitmesh silk, knot strength, spinnability and ABRASION RESISTANCE.The wire material braiding etting prepared with technical solution of the present invention, is keeping under the prerequisite that etting is powerful constant, and the reduction of etting specification, etting weight saving, the reduction of etting water resistance, the raw materials consumption of knitmesh silk can be made to reduce; And under the prerequisite keeping etting specification constant, the brute force of etting and etting impact resistance can be made to increase substantially, technique effect clearly, has and fishes for and the feasibility cultivating netting gear technical field and apply at seawater.

Detailed description of the invention

Here be a kind of knitmesh silk preparation method of 37.7tex with line density be example, the specific embodiment of the present invention is described: adopt medium molecular weight polyvinyl resin (hereinafter referred to as MMWPE resin), acrylic resin (being called for short PP resin), ethylene propylene diene rubber (being called for short EPDM resin), auxiliary agent, mixer, receive silk machine, devillicate machine, single screw extrusion machine and twice drawing-off electrical heating drawing machine, it is characterized in that (available dry wire drawing level MMWPE resin from Zibo American Standard macromolecular fibre Co., Ltd, melt index is 3.0g/10min, molecular weight 600,000 ~ 1,000,000, if MMWPE resin makes moist, then should carry out drying or drying process), dry wire drawing level PP resin (raises the S1004 type PP resin of sub-petrochemical iy produced, melt index is 3.0g/10min ~ 4.0g/10min, and addition is 31.3% ~ 35.3% of MMWPE weight resin, if PP resin makes moist, then should carry out drying or drying process), dry EPDM resin (LG-DOW produce 3722P type EPDM resin, addition is 1.4% ~ 1.6% of MMWPE weight resin, if EPDM resin makes moist, then should carry out drying or drying process), turpentine oil auxiliary agent (addition is 0.11% ~ 0.15% of MMWPE weight resin) mixer stirs 43min ~ 72min to material is all uniformly mixed, just obtains MMWPE/PP/EPDM tertiary blending pellet after compound is uniformly mixed, MMWPE/PP/EPDM tertiary blending pellet through single screw extrusion machine in specified temp (the 1. district in extruder barrel electrical heating district, 2. district, 3. district, 4. the temperature-control range in district is respectively 302 DEG C ~ 304 DEG C, 334 DEG C ~ 338 DEG C, 339 DEG C ~ 342 DEG C, 345 DEG C ~ 348 DEG C) under melt extrude, through cooling water tank water at low temperature, (cooling water tank is of a size of 56cm × 72cm × 67cm to the spun filament melt extruded from spinneret orifice, cooling water tank is furnished with water inlet pipe and overflow pipe, the water temperature of cooling water tank water at low temperature controls at 25.2 DEG C ~ 34.3 DEG C, spun filament cooling distance controlling is at 746mm ~ 999mm, vertical range in spinnerets and cooling water tank between the water surface controls at 343mm ~ 706mm) and the first drawing roller cooled and preliminary draft, preliminary draft silk is through 96.3 DEG C ~ 98.4 DEG C high temperature first drawing-off water baths and the second drawing roller, 96.9 DEG C ~ 99.5 DEG C high temperature second drawing-off water baths and the 3rd drawing roller carry out twice hot gas spring, preliminary draft silk carries out above-mentioned twice hot gas spring (drawing-off general times controls at 8.27 times ~ 8.99 times) by twice drawing-off electrical heating drawing machine, to use the receipts silk machine rolling monofilament tow of torque motor, monofilament tow is a kind of knitmesh silk through devillicate machine sub-wire under special point of thread tension (point a thread tension control in 7.9% ~ 9.5% of single wire fracture brute force), a kind of knitmesh silk preparation method that Here it is.Fish for according to seawater and cultivate netting gear performance and impact resistance requirement, the drawing-off general times of the present invention's twice hot gas spring can bring up to 10.68 times ~ 11.70 times, and the fracture strength performance of corresponding knitmesh silk can up to more than 7g/D; In addition, fish for and the anti-aging requirement cultivating netting gear and produce according to seawater, before mixer stirs, UV-327, antioxidant 1010 and DLTP is added in above-mentioned processing compound, UV-327 addition be MMWPE weight resin 0.25%, antioxidant 1010 addition is 0.3% of MMWPE weight resin, DLTP addition is 0.1% of MMWPE weight resin, can obtain a kind of knitmesh silk with ageing resistace.

Claims (2)

1. a knitmesh silk preparation method, adopt MMWPE resin, PP resin, EPDM resin, auxiliary agent, mixer, receive silk machine, devillicate machine, single screw extrusion machine and twice drawing-off electrical heating drawing machine, it is characterized in that MMWPE resin melting index is 3.0g/10min, molecular weight 600,000 ~ 1,000,000, PP resin melting index is 3.0g/10min ~ 4.0g/10min, addition is 31.3% ~ 35.3% of MMWPE weight resin, EPDM resin content is 1.4% ~ 1.6% of MMWPE weight resin, turpentine oil additive dosage is 0.11% ~ 0.15% of MMWPE weight resin, be stirred to till material is all uniformly mixed with mixer, compound is uniformly mixed and obtains MMWPE/PP/EPDM tertiary blending pellet, MMWPE/PP/EPDM tertiary blending pellet melt extrudes at a certain temperature through single screw extrusion machine, specified temp is the 1. district in extruder barrel electrical heating district, 2. district, 3. district, 4. the temperature-control range in district is respectively 302 DEG C ~ 304 DEG C, 334 DEG C ~ 338 DEG C, 339 DEG C ~ 342 DEG C, 345 DEG C ~ 348 DEG C, the spun filament melt extruded from spinneret orifice is cooled and preliminary draft through cooling water tank water at low temperature and the first drawing roller, the water temperature of cooling water tank water at low temperature controls at 25.2 DEG C ~ 34.3 DEG C, spun filament cooling distance controlling is at 746mm ~ 999mm, vertical range in spinnerets and cooling water tank between the water surface controls at 343mm ~ 706mm, preliminary draft silk is through 96.3 DEG C ~ 98.4 DEG C high temperature first drawing-off water baths and the second drawing roller, 96.9 DEG C ~ 99.5 DEG C high temperature second drawing-off water baths and the 3rd drawing roller carry out twice hot gas spring, preliminary draft silk carries out above-mentioned twice hot gas spring by twice drawing-off electrical heating drawing machine, drawing-off general times controls at 8.27 times ~ 8.99 times, to use the receipts silk machine rolling monofilament tow of torque motor, monofilament tow is knitmesh silk through devillicate machine sub-wire under specific point of thread tension, and a point thread tension controls in 7.9% ~ 9.5% of single wire fracture brute force, just obtains a kind of knitmesh silk.

2. a kind of knitmesh silk preparation method according to claim 1, it is characterized in that before mixer stirs, UV-327, antioxidant 1010 and DLTP is added in compound, UV-327 addition be MMWPE weight resin 0.25%, antioxidant 1010 addition be 0.3%, DLTP addition of MMWPE weight resin is 0.1% of MMWPE weight resin.