CN101851795B - Method for processing high-performance modified polyethylene monofilaments for manufacturing fishing net - Google Patents

Abstract

The present invention discloses a method for processing high-performance modified polyethylene monofilaments for manufacturing a fishing net, relates to a method for processing polyethylene monofilaments for manufacturing a fishing net and aims to provide a method for processing the high-performance modified polyethylene monofilaments for manufacturing the fishing net. In the technical scheme of the invention, a stirring machine, a single-screw extruder, a twice-drafting electrical heating drafting machine, a filament winding machine and a filament separating machine are adopted. The method is characterized by comprising the following steps of: mixing a sieved spinning-grade dry HDPE resin, a dry VERSIFYTM 6002 elastomer, white oil or a turpentine aid; uniformly mixing the materials to obtain an HDPE/VERSIFYTM 6002 elastomer blend and fusing and extruding the blend by using the single-screw extruder; cooling and pre-drafting fused and extruded primary filaments, thermally drafting the pre-drafted filaments twice, rapidly cooling the thermally-drafted filaments from which oil is removed with high-pressure air current and winding modified PE monofilaments by using the winding machine; and separating the modified PE monofilaments into the high-performance modified polyethylene monofilaments for manufacturing the fishing net by using the filament separating machine.

Description

The high-performance modified polyethylene monofilaments for manufacturing fishing net processing method

Technical field

The present invention relates to aquatic products technical field manufacturing fishing net polyethylene monofilament processing method.

Background technology

Polyethylene (PE) monofilament is an agricultural sciences aquatic products technical field manufacturing fishing net with main matrix fiber material, people are to its fracture strength, knot strength, circularity, extensibility, ABRASION RESISTANCE and heat resistance all have particular requirement, preferably have fracture strength and knot strength preferably as making simultaneously with the matrix fiber material as netting gear, have only by special spinning technique and just can produce manufacturing fishing net with high-performance modified PE monofilament, but existing aquatic products technical field manufacturing fishing net is that raw material adopts the hot water stretching to make with common PE monofilaments with the HDPE resin, it is improper because of spinning technique control in its spinning is produced, cause fracture strength and knot strength not to take into account, thereby can further have influence on the intensity or the outward appearance of monofilament and downstream netting gear goods thereof; Existing manufacturing fishing net with common PE monofilaments processing with drafting multiple be generally about 6.0～9.6 times, its spinning heat medium is water (water temperature is about 94 ℃), cause it to have defectives such as intensity is less than normal, ABRASION RESISTANCE deviation, the fishery accident easily takes place in this netting gear that further causes processing with them when fish production.Development along with fishing net modernization, maximization and off-shore operation particularization, be badly in need of the PE monofilament that intensity height, circularity are good, ABRASION RESISTANCE better reaches the moderate good combination property of extensibility that a large amount of fracture strengths and knot strength all can be taken into account, but owing to have the special requirement that the fishing of common PE monofilaments is relatively poor with adaptability, be difficult to satisfy Modern Fishery production now.Therefore, need to solve manufacturing fishing net PE monofilament processing method problem.

Summary of the invention

The technical issues that need to address of the present invention provide a kind of high-performance modified polyethylene monofilaments for manufacturing fishing net processing method.

Technical scheme of the present invention adopts mixer, single screw extrusion machine, twice drawing-off electrical heating drawing machine, receipts silk machine and divides a silk machine, HDPE resin, VERSIFY ^TM6002 elastomers, white oil or turpentine oil auxiliary agent is characterized in that the dry HDPE resin of processing back spinning level, the dry VERSIFY of sieving ^TM6002 elastomers, white oil or turpentine oil auxiliary agent mix, and HDPE resin melt index should satisfy 0.6～1.5g/10min; VERSIFY ^TM6002 elastomer melt index are 2.0g/10min, and density is 0.888g/cm ³, addition is 9.8～10.1% of a HDPE weight resin; White oil or turpentine oil additive dosage are 0.4～0.5% of HDPE weight resin; Above-mentioned compound stirs 30～50min with mixer and all mixes thoroughly to material, just obtains HDPE/VERSIFY after compound is mixed thoroughly ^TM6002 elastomer blends; HDPE/VERSIFY ^TM6002 elastomer blends through the I district in single screw extrusion machine barrel electrical heating district, the temperature-control range in II district, III district, IV district is respectively 160～166 ℃, 217～223 ℃, 264～272 ℃, 286～293 ℃ and melt extrudes; The spun filament that melt extrudes from spinneret orifice obtains cooling and preliminary draft through the cooling water tank water at low temperature and first drawing roller, and cooling water tank water at low temperature water temperature is controlled at 26～34 ℃, the vertical range between the water surface is controlled at 2～7cm in 0.78～1.02m, spinnerets and the cooling water tank apart from being controlled in the spun filament cooling; The preliminary draft silk carries out twice hot drawing-off through 93～97 ℃ of high temperature, the first drawing-off water bath and second drawing roller, 109～112 ℃ of high temperature second drawing-off deep fat baths and the 3rd drawing roller, the second drawing-off deep fat bath with ethylene glycol as special drawing-off heat medium; After being controlled at 10.83～11.43 times, adopts the drawing-off general times that the preliminary draft silk carries out above-mentioned twice hot drawing-off by twice drawing-off electrical heating drawing machine cooling fast after the high pressure draught oil removing, so that with the receipts silk machine rolling modified PE monofilament tow of torque motor; Modified PE monofilament tow under specific minute thread tension through minute silk machine divide silk for manufacturing fishing net with high-performance modified PE monofilament, thread tension was controlled at 20～30% of polyethylene monofilament ultimate strength in specific minute.

The present invention is owing to add the VERSIFY of specified quantitative in the HDPE resin concentrates ^TM6002 elastomers, white oil or turpentine oil auxiliary agent, the manufacturing fishing net that adopts special spining technology to produce after mixing thoroughly by mixer again to be fit to the aquatic products field is with high-performance modified PE monofilament, when guaranteeing that monofilament can continuous industry production, fracture strength, the knot strength of monofilament have been improved, improved monofilament circularity, flexibility, abrasion resistance and spinnability, combination property is apparently higher than existing common PE monofilaments; Monofilament hot drawing-off for the second time replaces traditional hot water drawing process with ethylene glycol as special drawing-off heat medium and adds the hot aqueous medium with drawing-off, at the special drafting multiple that characteristics adopted of netting gear with matrix fiber, guarantee that the heat treatment temperature of monofilament when the second bath drawing-off is higher than 109 ℃, guarantee in the monofilament preparation process that wire vent is normal and drawing-off is smooth, guarantee that single wire fracture intensity and knot strength all can take into account, make that the abrasion resistance of the high-performance modified PE monofilament that processes is good, fracture strength reaches 6.82cN/dtex, knot strength reaches 4.06cN/dtex and elongation at break is positioned at 11～15% interval; The branch silk technology that this method adopts will divide thread tension to be controlled at 20～30% of single wire fracture brute force, thereby guarantee to divide thread tension can with rolling on the silk bobbin in the monofilament tow cross one another monofilament separately, neat arrival bobbin with placing side by side, can prevent that again bobbin from accepting excessive impression silk or the quick-fried bobbin of causing of winding tension, improve PE monofilament The comprehensive performance.Consider fishing with factors such as material and netting gear costs, the present invention adopts the relatively cheap VERSIFY of price ^TM6002 elastomer certified products and compound are without double screw extruder blend granulation, and the product valency worker cost to guarantee to process is beneficial to apply in fishery; If adopt VERSIFY ^TM6002 elastomer certified products substitute inexpensive VERSIFY ^TM6002 elastomer certified products, and adopt double screw extruder blend granulation after mixer is mixed compound all again can be obtained the modified polyethylene monofilaments product of better technique effect under the constant condition of other conditions.In a word, the present invention has compared with prior art improved flexibility, mar proof, the intensity of netting gear with matrix fiber; Netting gear PE monofilament and downstream netting gear or netting The comprehensive performance have been improved.That the line density that adopts technical solution of the present invention to produce is the netting gear of 38.5tex is good with good spinnability, the flexibility of high-performance modified PE monofilament, ABRASION RESISTANCE is good, and its fracture strength and knot strength can have commercially available netting gear now improve 26.3%, 8.3% respectively with common PE monofilaments Grade A index; Its elongation at break size meets the aquatic products field fully and produces needs.High-performance modified PE monofilament with the technology of the present invention processing is processed into netting gear, under the powerful identical condition of netting gear, can make netting gear with netting twine order pin rugosity reduce, the raising of netting gear flexibility, netting gear weight saving, netting gear water resistance reduce, netting gear raw materials consumption minimizing, netting gear ABRASION RESISTANCE improve, and have improved the combination property and the fishing adaptability thereof of netting gear.

The specific embodiment

The manufacturing fishing net that with the line density is 38.5tex is an example with high-performance modified PE monofilament processing method, and the specific embodiment of the present invention is described.

Technical scheme of the present invention adopts mixer, HDPE resin, VERSIFY ^TM6002 elastomers, auxiliary agent, single screw extrusion machine, twice drawing-off electrical heating drawing machine, receipts silk machine and a branch silk machine, the dry HDPE resin of the processing back spinning level of will sieving (is raised sub-petrochemical iy produced, melt index should satisfy 0.6～1.5g/10min, if the HDPE resin makes moist, then should be placed on 60～80 ℃ baking oven inner drying or place and can use after drying under the sunshine), dry VERSIFY ^TM(the Dow Chemical Company produces 6002 elastomers, and melt index is 2.0g/10min, and density is 0.888g/cm ³, addition is 10% of a HDPE weight resin, test VERSIFY ^TM6002 elastomers are certified products) and turpentine oil auxiliary agent (addition be HDPE weight resin 0.45%) etc. stir 38min with mixer and all mix thoroughly to material, compound just obtains HDPE/VERSIFY after mixing all ^TM6002 elastomer blends; HDPE/VERSIFY ^TM(screw slenderness ratio is 25: 1 to 6002 elastomer blends through single screw extrusion machine, filter thickness 10mm, screen pack adopts 120 purpose copper mesh, 80 each one deck of order wire netting) in specified temp (the I district in extruder barrel electrical heating district, the II district, the III district, the temperature-control range in IV district is respectively 163 ℃, 220 ℃, 268 ℃, 290 ℃) under melt extrude, (water temperature is controlled at 26～34 ℃ to the spun filament that melt extrudes from spinneret orifice through the cooling water tank water at low temperature, spun filament cooling distance is controlled at 0.78～1.02m, vertical range in spinnerets and the cooling water tank between the water surface is controlled at 2～7cm, cooling water tank is of a size of 0.60m * 0.50m * 0.60m, cooling water tank is furnished with water inlet pipe and water outlet pipe) and first drawing roller obtain the cooling and preliminary draft, the preliminary draft silk is through 95 ℃ of high temperature, the first drawing-off water bath and second drawing roller, 110 ℃ of high temperature second drawing-off deep fat baths (with ethylene glycol or salad wet goods as special drawing-off heat medium) and the 3rd drawing roller are carried out twice hot drawing-off, the preliminary draft silk carries out above-mentioned twice hot drawing-off by twice drawing-off electrical heating drawing machine, and (twice hot drawing-off is respectively A * B=68 * 28 with two groups of gears, C * D=43 * 53, these two groups of gears make the drawing-off general times be controlled at 11.13 times) (Pressure control is at 6.0kg/cm for back employing high pressure ²About) cooling fast after the air-flow oil removing, so that with the receipts silk machine rolling modified PE monofilament tow of torque motor; Modified PE monofilament tow specific minute thread tension (divide thread tension be controlled at this polyethylene monofilament ultimate strength 22～6%) under through the FS350 type divide the silk machine divide silk for netting gear with high-performance modified PE monofilament (be positioned at 11～15% interval as elongation at break, its fracture strength and knot strength can improve 26.3%, 8.3% respectively with common PE monofilaments Grade A index than having commercially available netting gear now).

The line density that the present invention produces is that the high-performance modified PE monofilament of 38.5tex both can be processed into the netting gear making with rope matrix fiber material, can be processed into netting gear again and make of net sheet matrix fibrous material; Powerful identical and have under the condition of superiority of effectiveness at netting gear, can make that the netting gear softness is good, weight saving, resistance reduce, raw materials consumption minimizing, durability improve, and have improved polyethylene monofilament and downstream fishing net thereof or netting The comprehensive performance and fishing adaptability thereof.

Claims (1)

1. the high-performance modified polyethylene monofilaments for manufacturing fishing net processing method adopts mixer, single screw extrusion machine, twice drawing-off electrical heating drawing machine, receipts silk machine and divides a silk machine, HDPE resin, VERSIFY ^TM6002 elastomers, auxiliary agent is characterized in that the dry HDPE resin of processing back spinning level, the dry VERSIFY of sieving ^TM6002 elastomers, white oil or turpentine oil auxiliary agent mix, and HDPE resin melt index should satisfy 0.6～1.5g/10min; VERSIFY ^TM6002 elastomer melt index are 2.0g/10min, and density is 0.888g/cm ³, addition is 9.8～10.1% of a HDPE weight resin; White oil or turpentine oil additive dosage are 0.4～0.5% of HDPE weight resin; Above-mentioned compound stirs 30～50min with mixer and all mixes thoroughly to material, just obtains HDPE/VERSIFY after compound is mixed thoroughly ^TM6002 elastomer blends; HDPE/VERSIFY ^TM6002 elastomer blends through the I district in single screw extrusion machine barrel electrical heating district, the temperature-control range in II district, III district, IV district is respectively 160～166 ℃, 217～223 ℃, 264～272 ℃, 286～293 ℃ and melt extrudes; The spun filament that melt extrudes from spinneret orifice obtains cooling and preliminary draft through the cooling water tank water at low temperature and first drawing roller, and cooling water tank water at low temperature water temperature is controlled at 26～34 ℃, the vertical range between the water surface is controlled at 2～7cm in 0.78～1.02m, spinnerets and the cooling water tank apart from being controlled in the spun filament cooling; The preliminary draft silk carries out twice hot drawing-off through 93～97 ℃ of high temperature, the first drawing-off water bath and second drawing roller, 109～112 ℃ of high temperature second drawing-off deep fat baths and the 3rd drawing roller, the second drawing-off deep fat bath with ethylene glycol as special drawing-off heat medium; After being controlled at 10.83～11.43 times, the drawing-off general times that the preliminary draft silk carries out above-mentioned twice hot drawing-off by twice drawing-off electrical heating drawing machine adopts 6.0kg/cm ²Cooling fast after the high pressure draught oil removing is so that with the receipts silk machine rolling modified PE monofilament tow of torque motor; Modified PE monofilament tow under specific minute thread tension through minute silk machine divide silk for manufacturing fishing net with high-performance modified PE monofilament, thread tension was controlled at 20～30% of polyethylene monofilament ultimate strength in specific minute.