CN103015251A - Production process for high-strength low-permeation volume flat filament dry net - Google Patents

Abstract

The invention discloses a production process for a high-strength low-permeation volume flat filament dry net. The production process comprises the following steps of: raw material purchasing, wire inspection, warping, threading, net weaving, net inspection, primary setting, net cutting, splicing, secondary setting, finished product inspection, packaging and putting in storage. Hydrolysis-resistant filaments selected by the production process disclosed by the invention have absolute stability, abrasive resistance and antifouling property and can completely meet operating requirements under high-speed and high-temperature damp and hot environments. The flat filament dry net not only has the largest contact surface but also has the best evaporated moisture discharge way.

Description

The production technology of the little Air permenbility flat filament drying net of a kind of high strength

Technical field

The present invention relates to a kind of flat filament drying net, be specifically related to the production technology of the little Air permenbility flat filament drying net of a kind of high strength.

Background technology

Drying mesh of drying part of paper making machine replaces dryer felt to bring into play great function for saving power consumption, raising production capacity, and except the little board of indivedual production grammes per square metres speciality paper low, that the speed of a motor vehicle is low, papermaking enterprise has generally all used various types of dried nets now.Dried net can be divided into individual layer, 1.5 layers, 2 layers, 3 layers etc. by the number of plies; Can be divided into the dried net of circle silk, the dried net of shaped filaments etc. by employed wire rod shape.According to the diverse location the cadre, more toward front end, owing to the paper contained humidity is large, for avoiding forming wire mark and necessary oven dry curve, it is enough little to require to do the Air permenbility of netting, and the difference of interface and dictyosome is enough little.Because of oven dry section hot and humid environment, require the resistant to hydrolysis ability of monofilament strong simultaneously, intensity stabilization, so very strict to the requirement of doing net, high-speed paper machine is then more harsh.At present domestic other papermaking wire-cloth enterprises dried net kind and performance of producing can only be applied to the following paper machine of speed of a motor vehicle 800m/min, other can only rely on import.In order to address this problem, my company drops into huge fund, purchase international advanced knitmesh equipment, the international high-quality feedstocks of import, use for reference technology leading in the world, through the development and production in 2 years, the little Air permenbility flat filament drying net of my the company's high strength paper machine more than a plurality of paper mill speed of a motor vehicle 1000m/min used, and obtains obvious economic benefit and social favorable comment.

Summary of the invention

The object of the invention is to for the deficiencies in the prior art, the production technology of the little Air permenbility flat filament drying net of a kind of high strength is provided.

The technical solution used in the present invention is as follows:

The production technology of the little Air permenbility flat filament drying net of a kind of high strength may further comprise the steps:

(1) raw material is bought

According to production schedule requirement, buy the high-quality monofilament by model, quality, quantity, monofilament of the present invention is all selected German import high-quality PET monofilament;

(2) wire rod check

The indexs such as the wire diameter that requires according to the production schedule, pyrocondensation, TENSILE STRENGTH, acid-alkali-resistant degree are checked item by item, inspect by random samples in batches and full inspection according to concrete production requirement, and this examination and test of products index is as follows:

Warp adopts the rectangle monofilament, and its sectional dimension is 0.35-0.40mm * 0.55-0.60mm, TENSILE STRENGTH: 550-650 N/mm ², pyrocondensation value: 6.5-8%,

Parallel adopts the circle silk of two kinds of different-diameters, parallel one: Ф 0.3-0.4mm, TENSILE STRENGTH: 500-600N/mm ², pyrocondensation value: 1.5-3%, parallel two: Ф 0.6-0.7mm, TENSILE STRENGTH: 480-580N/mm ², pyrocondensation value: 1.5-3%;

(3) warping

Require every monofilament even tension consistent, speed of beaming: 40-50m/min, tension force: 70-80 kilogram/ring;

(4) pass head

Adopt along wearing method, warp is penetrated each heald frame in order successively;

(5) knitmesh

Carry out knitmesh according to fabric organization chart, weave through close 18-20 root/cm, two kinds in parallel circle silk uses according to 1:1, weaves filling density according to the Air permenbility adjustment, and scope is at 11-15 root/cm, require fabric through, weft density evenly, without cracked ends, staplings, return nose, two-wire etc.;

(6) test net

Woven webs is carried out Pre-testing, process dictyosome flaw, the registration of the market of going forward side by side condition, provide foundation for rationally cutting net;

(7) once typing

According to the number of turns typing faller speed, heating-up temperature are set, longitudinal tension force multiply by setting value according to the net width, calculate vertically the control that stretches of total tension force input setting machine, horizontal tentering device shrinks control by set point value input setting machine, makes the stability and the service life that reach the regulation elongation, shrink and breathe freely, improve net after the net typing;

(8) cut net

Cut net by the net type of customer requirements, ventilative, specification, must carry out strict preliminary examination according to the production work ticket before cutting net, avoid problematic dictyosome, rationally assembly is cut, and guarantees into the net rate;

(9) peg graft

By the grafting operation, with the dismantle parallel of one fixed width of the dictyosome two ends that cut, spiral ring is woven in the network access body respectively, net is coupled together by spiral ring with special connecting line at last, make things convenient for the use of paper plant's paper machine.

(10) secondary typing

The main processing of secondary typing socket is smooth, and upper machine fortune turns around, and network interface is smooth to be got final product, temperature is 140-150 ℃, and length is elongated the 10-12 centimetre by elongating the 5-6 centimetre below 20 meters more than 20 meters, horizontal tension remains on about the 150-160 kilogram, and speed is 3-4 m/min;

(11) finished product inspection

With reference to polyester webs industry standard GB/T26456-2011, recheck comprehensively, length and width, ventilative, through close, filling density, joint strength, net flatness etc., do not meet standard-required resolutely refuse let pass, what guarantee to offer the client is the high-quality certified products;

(12) packing warehouse-in:

Packing case is by standard customization, wears silk, the quality certification is put in accordance with regulations, packing case outward appearance model specification, direction, moistureproof indicate, handle with care etc. identify clear, directly perceived.

Beneficial effect of the present invention:

(1) flat filament drying net of the present invention has been considered the most desirable of energy, the most sufficient utilization, the good major requirement of doing net is exactly to have enough large contact area, the present invention extends this viewpoint, evaporate moisture is discharged in the mode of the best, the flat filament drying net braid method that the present invention produces is very unique, increased contact area, but surface area contacted increase is the cost that is reduced to the evaporate moisture discharge-channel, so just so that drying efficiency decline, consider this point, the present invention's design makes these factors reach neutralization, and the contact surface of existing maximum has again best evaporate moisture to discharge mode.

(2) the present invention adopts selected resistant to hydrolysis monofilament, has absolute stability and wear-resisting and resistant to pollution performance, can adapt to instructions for use under high speed, high temperature, the damp and hot environment fully.

Description of drawings

Fig. 1 is flat filament drying net production procedure of the present invention.

Fig. 2 is setting process parameter of the present invention.

Fig. 3 is flat filament drying net of the present invention fabric organization chart.

The specific embodiment

Embodiment

The production technology of the little Air permenbility flat filament drying net of a kind of high strength is characterized in that may further comprise the steps:

(1) raw material is bought

According to production schedule requirement, buy the high-quality monofilament by model, quality, quantity, monofilament of the present invention is all selected German import PET monofilament;

(2) wire rod check

The indexs such as the wire diameter that requires according to the production schedule, pyrocondensation, TENSILE STRENGTH, acid-alkali-resistant degree are checked item by item, inspect by random samples in batches and full inspection according to concrete production requirement, and this examination and test of products index is as follows:

Warp adopts the rectangle monofilament, and its sectional dimension is 0.37mm * 0.58mm, TENSILE STRENGTH: 620 N/mm ², the pyrocondensation value: 7%,

Parallel adopts the circle silk of two kinds of different-diameters, parallel one: Ф 0.35mm, TENSILE STRENGTH: 550N/mm ², the pyrocondensation value: 2.5%, parallel two: Ф 0.65mm, TENSILE STRENGTH: 560N/mm ², pyrocondensation value: 2.5%;

(3) warping

Require every monofilament even tension consistent, speed of beaming: 40m/min, tension force: 80 kilograms/ring;

(4) pass head

Adopt along wearing method, warp is penetrated each heald frame in order successively;

(5) knitmesh

Weave through close 18/cm, two kinds in parallel circle silk uses according to 1:1, weaves 12/cm of filling density, require fabric through, weft density evenly, without cracked ends, staplings, return nose, two-wire etc.;

(6) test net

Woven webs is carried out Pre-testing, process dictyosome flaw, the registration of the market of going forward side by side condition, provide foundation for rationally cutting net;

(7) once typing

According to the number of turns typing faller speed, heating-up temperature are set, longitudinal tension force multiply by setting value according to the net width, calculate vertically the control that stretches of total tension force input setting machine, horizontal tentering device shrinks control by set point value input setting machine, makes the stability and the service life that reach the regulation elongation, shrink and breathe freely, improve net after the net typing;

(8) cut net

Cut net by the net type of customer requirements, ventilative, specification, must carry out strict preliminary examination according to the production work ticket before cutting net, avoid problematic dictyosome, rationally assembly is cut, and guarantees into the net rate;

(9) peg graft

By the grafting operation, with the dismantle parallel of one fixed width of the dictyosome two ends that cut, spiral ring is woven in the network access body respectively, net is coupled together by spiral ring with special connecting line at last, make things convenient for the use of paper plant's paper machine.

(10) secondary typing

The main processing of secondary typing socket is smooth, and upper machine fortune turns around, and network interface is smooth to be got final product, and temperature is 140 ℃, and length is elongated 10 centimeters by elongating 5 centimeters below 20 meters more than 20 meters, and horizontal tension remains on about 150 kilograms, and speed is 3 m/mins;

(11) finished product inspection

With reference to polyester webs industry standard GB/T26456-2011, recheck comprehensively, length and width, ventilative, through close, filling density, joint strength, net flatness etc., do not meet standard-required resolutely refuse let pass, what guarantee to offer the client is the high-quality certified products;

(12) packing warehouse-in:

Packing case is by standard customization, wears silk, the quality certification is put in accordance with regulations, packing case outward appearance model specification, direction, moistureproof indicate, handle with care etc. identify clear, directly perceived.The comparative test of common monofilament and resistant to hydrolysis monofilament

Experimental condition: anti-aging high-potting still: inside adds the heating of water rear enclosed;

Pressure: 2-3bar;

Temperature: 120-135 ℃;

Every 24 hours sample thiefs once, detect that indices the results are shown in Table 1, table 2.

The common monofilament result of the test of table 1

Table 2 resistant to hydrolysis monofilament result of the test

Claims (1)

1. the production technology of the little Air permenbility flat filament drying net of high strength is characterized in that may further comprise the steps:

(1) raw material is bought

According to production schedule requirement, buy the high-quality monofilament by model, quality, quantity, monofilament of the present invention is all selected German import high-quality PET monofilament;

(2) wire rod check

The indexs such as the wire diameter that requires according to the production schedule, pyrocondensation, TENSILE STRENGTH, acid-alkali-resistant degree are checked item by item, inspect by random samples in batches and full inspection according to concrete production requirement, and this examination and test of products index is as follows:

Warp adopts the rectangle monofilament, and its sectional dimension is 0.35-0.40mm * 0.55-0.60mm, TENSILE STRENGTH: 550-650 N/mm ², pyrocondensation value: 6.5-8%,

Parallel adopts the circle silk of two kinds of different-diameters, parallel one: Ф 0.3-0.4mm, TENSILE STRENGTH: 500-600N/mm ², pyrocondensation value: 1.5-3%, parallel two: Ф 0.6-0.7mm, TENSILE STRENGTH: 480-580N/mm ², pyrocondensation value: 1.5-3%;

(3) warping

Require every monofilament even tension consistent, speed of beaming: 40-50m/min, tension force: 70-80 kilogram/ring;

(4) pass head

Adopt along wearing method, warp is penetrated each heald frame in order successively;

(5) knitmesh

Carry out knitmesh according to fabric organization chart, weave through close 18-20 root/cm, two kinds in parallel circle silk uses according to 1:1, weaves filling density according to the Air permenbility adjustment, and scope is at 11-15 root/cm, require fabric through, weft density evenly, without cracked ends, staplings, return nose, two-wire etc.;

(6) test net

Woven webs is carried out Pre-testing, process dictyosome flaw, the registration of the market of going forward side by side condition, provide foundation for rationally cutting net;

(7) once typing

According to the number of turns typing faller speed, heating-up temperature are set, longitudinal tension force multiply by setting value according to the net width, calculate vertically the control that stretches of total tension force input setting machine, horizontal tentering device shrinks control by set point value input setting machine, makes the stability and the service life that reach the regulation elongation, shrink and breathe freely, improve net after the net typing;

(8) cut net

Cut net by the net type of customer requirements, ventilative, specification, must carry out strict preliminary examination according to the production work ticket before cutting net, avoid problematic dictyosome, rationally assembly is cut, and guarantees into the net rate;

(9) peg graft

By the grafting operation, with the dismantle parallel of one fixed width of the dictyosome two ends that cut, spiral ring is woven in the network access body respectively, net is coupled together by spiral ring with special connecting line at last, make things convenient for the use of paper plant's paper machine;

(10) secondary typing

The main processing of secondary typing socket is smooth, and upper machine fortune turns around, and network interface is smooth to be got final product, temperature is 140-150 ℃, and length is elongated the 10-12 centimetre by elongating the 5-6 centimetre below 20 meters more than 20 meters, horizontal tension remains on about the 150-160 kilogram, and speed is 3-4 m/min;

(11) finished product inspection

With reference to polyester webs industry standard GB/T26456-2011, recheck comprehensively, length and width, ventilative, through close, filling density, joint strength, net flatness etc., do not meet standard-required resolutely refuse let pass, what guarantee to offer the client is the high-quality certified products;

(12) packing warehouse-in:

Packing case is by standard customization, wears silk, the quality certification is put in accordance with regulations, packing case outward appearance model specification, direction, moistureproof indicate, handle with care etc. identify clear, directly perceived.

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