CN106149138A - A kind of heat-resist RING SPINNING elastic force weft yarn and production technology thereof - Google Patents

Abstract

The present invention provides a kind of heat-resist RING SPINNING elastic force weft yarn, described elastic force weft yarn, and fiber number is that 20 ± 2 English prop up；The present invention also provides for the production technology of a kind of heat-resist RING SPINNING elastic force weft yarn, described production technology, including the preparation of PA66 undrawn yarn, rove, the feeding of PA66 undrawn yarn, spun yarn.Elastic force weft yarn prepared by the present invention, fiber number is that 20 ± 2 English prop up, single thread ultimate strength: 380 ± 50cN, strongly CV:＜ 8%；Elongation at break is 280 ± 50%, percentage elongation CV ＜ 8%；Elastic force weft yarn prepared by the present invention, heat-resist, in the heat treatment processes such as fabric impregnation, strength and the extendability loss of energy of elastic force weft yarn are little；After placing 4 minutes under the conditions of 240 ° of C, single thread ultimate strength 330 ± 50cN；Elongation at break 210 ± 50%.

Description

A kind of heat-resist RING SPINNING elastic force weft yarn and production technology thereof

Technical field

The present invention provides a kind of heat-resist RING SPINNING elastic force weft yarn and production technology thereof, belongs to spinninging technical field.

Background technology

In recent years, global tire meridian rate sustainable growth, radial-ply tyre accounts for 90%, wherein in world's tire total amount Method, English, moral, meaning, U.S., daily realize 100% meridian.China's tire meridian rate increases swift and violent, according to industry form, Within 2006, tire meridian rate reaches 67.1%.The tyre equatorial used currently on the market, two kinds nothing more than: chinlon and terylene, What chinlon yarn generally used is nylon (PA) the 66 woven product of industrial yarn；

The chinlon weft yarn weaving radial-ply tyre cord fabric in prior art has the disadvantage that

(1) single thread ultimate strength and fracture productivity ratio are relatively low；

(2) after the abundant impregnation of cord fabric, the poor heat resistance of weft yarn, in the heat treatment processes such as fabric impregnation, the strength of weft yarn and The extendability loss of energy is bigger；

(3) efficiency that uses that jet cloth is woven when making is high, latitude stops many；

(4) fabric tissue using weft yarn to make is unstable.

Summary of the invention

For solving the deficiency that prior art exists, the present invention provides a kind of heat-resist RING SPINNING elastic force weft yarn and life thereof Production. art, to realize following goal of the invention:

(1) the elastic force weft yarn that prepared by the present invention, fiber number is that 20 ± 2 English prop up, and single thread ultimate strength reaches 380 ± 50cN, strongly CV ＜ 8%；Elongation at break reaches 280 ± 50%, percentage elongation CV ＜ 8%；

(2) the elastic force weft yarn that prepared by the present invention, heat-resist, in the heat treatment processes such as fabric impregnation, the strength of elastic force weft yarn Little with the extendability loss of energy；

(3) the elastic force weft yarn that prepared by the present invention, when being used for weaving radial-ply tyre cord fabric, the efficiency that uses that jet cloth is woven when making is high, Latitude stops few；100000 latitudes stop less than 5 times；

(4) the elastic force weft yarn that prepared by the present invention, can fully keep cord fabric fabric tissue stable, and cord fabric immersing glue process can be expired Foot expanding requirement, keeps cloth web stabilization constantization after expanding to scope of design impregnation.

For solving above-mentioned technical problem, the technical scheme that the present invention takes is as follows:

A kind of heat-resist RING SPINNING elastic force weft yarn, it is characterised in that: described elastic force weft yarn, fiber number is that 20 ± 2 English prop up.

The following is and the further of technical solution of the present invention is improved:

Described elastic force weft yarn, single thread ultimate strength: 380 ± 50cN, elongation at break is 280 ± 50%.

Described elastic force weft yarn, strongly CV ＜ 8%, percentage elongation CV ＜ 8%.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn, described production technology, including PA66 undrawn yarn Preparation, rove, the feeding of PA66 undrawn yarn, spun yarn.

Described PA66 undrawn yarn, fiber number is 230 ± 20dtex.

Described PA66 undrawn yarn, ultimate strength is 400 ± 50cN, strongly CV < 8%, and elongation at break is 280 ± 50%, Elongation at break CV < 8%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 330 ± 50cN, extension at break is 210 ± 50%。

Described PA66 undrawn yarn be preferably: fiber number is 230 ± 10dtex, and ultimate strength is 400 ± 20cN, strongly CV < 8%, elongation at break is 280 ± 20%, elongation at break CV < 8%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 330 ± 20cN, extension at break is 210 ± 20%.

The preparation of described PA66 undrawn yarn, including spinning, cooling molding and winding；

Described spinning, cooling molding, assembly preheating temperature: 320 ± 10 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump turns Speed: 22.5-23.5 rev/min, cross air blasting wind speed 1.3 ± 0.2 meter per second, cross air blasting pathogenic wind-warm: 25 ± 3 DEG C, rheumatism 70 ± 5%.

Described winding, upper draw-off godet frequency: 70 ± 3HZ, lower draw-off godet frequency: 70 ± 2HZ, friction roller frequency: 70 ± 2HZ, reciprocal frequency of transverse moving: 58-64HZ, winding speed: 989 ± 3 ms/min, oil concentration: 14 ± 1%, oil preparation oil applying rate: 0.85-0.95%。

Described rove, uses combed long staple cotton, cotton quality: 137A；Cotton sliver fiber upper half mean length 33-35mm, Below 16.5mm chopped fiber is less than 6.5%, mic value A level；Quantitative 3.45 ± 0.2g/ rice, twist factor 105 ± 10.

Described spun yarn, yarn roller centre-to-centre spacing proparea 20mm, ratch back zone 40mm, back zone drafting multiple 1.28- 1.53 times, front roller speed 160 ± 10 revs/min.

Described front roller speed is preferably 160 ± 5 revs/min.

Described back zone drafting multiple, preferably 1.37-1.46 times, front roller speed is preferably 160 ± 2 revs/min.

Described spun yarn, is uniformly coated with combed long staple cotton outside PA66 undrawn yarn, the cotton percentage by weight 25 ± 5% of bag, spun yarn The twist is 720 ± 100 twists/m.

Described ramie yarn twist, preferably 720 ± 60 twists/m；

Further, described ramie yarn twist, preferably 720 ± 30 twists/m；

The cotton percentage by weight of described bag is preferably 25 ± 3%,

The feeding of described PA66 undrawn yarn, the tension force 2.8-5.2g of silk.

The tension force of described silk, preferably 3.5-4.7g.

Described production technology, also includes automatic winding；Described automatic winding, molding balance pressure 0.38 ± 0.12MPa； Tension force controls: cylinder yarn length less than 20% tension parameters 10-14, length 20-90% tension parameters 13-17, length 90-100% is opened Force parameter 16-20；

Described tension force controls, preferably cylinder yarn length less than 20% tension parameters 11.4-12.2, length 20-90% tension parameters 14.7-15.6, length 90-100% tension parameters 17.5-18.5；

Described spun yarn spinning frame, including tensioner, godet roller, front leather roller；Described tensioner, uses tension piece natural pressure Control, weight 2-5g；Described godet roller, a diameter of 37mm；Described front leather roller, hardness 83 ± 3.

The production technology of described elastic force weft yarn, also includes sizing；Described sizing, vacuum and steam shapes, vapor (steam) temperature 100 ± 20 degree；

Compared with prior art, beneficial effects of the present invention is as follows:

(1) the elastic force weft yarn that prepared by the present invention, fiber number is that 20 ± 2 English prop up, single thread ultimate strength: 380 ± 50cN, strongly CV:＜ 8%；Elongation at break is 280 ± 50%, percentage elongation CV ＜ 8%；

(2) the elastic force weft yarn that prepared by the present invention, heat-resist, in the heat treatment processes such as fabric impregnation, the strength of elastic force weft yarn Little with the extendability loss of energy；After placing 4 minutes under the conditions of 240 ° of C, single thread ultimate strength 330 ± 50cN, loses 11.6- 14.5%；Elongation at break 210 ± 50%, loses 20-25%；

(3) the elastic force weft yarn that prepared by the present invention, when being used for weaving radial-ply tyre cord fabric, the efficiency that uses that jet cloth is woven when making is high, Latitude stops few；100000 latitudes stop less than 5 times；

(4) the elastic force weft yarn that prepared by the present invention, can fully keep cord fabric fabric tissue stable, and cord fabric immersing glue process can be expired Foot expanding requirement, keeps cloth web stabilization constantization after expanding to scope of design impregnation；

(5) the elastic force weft yarn that prepared by the present invention, low price, it is substantially reduced cord fabric weaving cost；Steady quality is reliable, especially It is suitable for the weaving of medium-to-high grade tire cord fabric.

Accompanying drawing explanation

Accompanying drawing 1 is the structural representation of the godet roller that the present invention produces for elastic force weft yarn；

In figure,

1-godet roller body, 2-axis hole, 3-annular seal wire groove, 4-left seal wire face, 5-right seal wire face, 6-kerve, 7-left redundant ring, 8-right redundant ring.

Detailed description of the invention

Hereinafter the preferred embodiments of the present invention are illustrated, it should be appreciated that preferred embodiment described herein is only used In the description and interpretation present invention, it is not intended to limit the present invention.

The production technology of the RING SPINNING elastic force weft yarn that embodiment 1 one kinds is heat-resist

With ring spinning spinning frame through transformation, install hanging wire frame, godet roller additional, outside PA66UDY, be coated with cotton fiber, at front skin Roller is in silk and converges, and by spinning frame twist system, by cotton fiber uniform winding tightly at the outer layer of PA66UDY, is wound on On spool, make spun yarn cop, after cop is implemented dead twist process, be machined to a yarn shape with automatic winding.

Specifically include following steps:

Step one, the preparation of PA66 undrawn yarn

The preparation of described PA66 undrawn yarn, comprises the following steps:

(1) material choice

Use PA66 resin slicer, viscosity 3.0；

Described resin slicer, oxidation index (YI)≤-2, moisture content (ppm)≤3000, appearance requirement does not allow obvious black grain, Overlength and adhesion section.

(2) it is dried

With VC352 type rotary drum, section is dried；

Drying process is as follows: baking temperature 120 ± 5 DEG C, 4-4.5 hour drying time, and being dried vacuum is >=-0.09MPa, dry The dry moisture to section is 850 ± 50ppm.

(3) extrusion molten

Spinning melt temperature 295 ± 5 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 1 below.

The parameter of table 1 extrusion molten

(4) assembling components

Adding 150 mesh stainless (steel) wires before spinneret, before stainless (steel) wire, make filter course with 60 mesh metal sands, the specification of spinneret is 22 hole × 0.3 × 0.6mm(draw ratio 1:2)；

Described 0.3mm is aperture, 0.6mm hole length.

(5) spinning, cooling molding

Assembly preheating temperature: 310 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 22.5 revs/min, cross air blasting wind Speed 1.1 meter per seconds, cross air blasting pathogenic wind-warm: 22 DEG C, rheumatism 65%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 67HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 68HZ, friction roller frequency: 68HZ, reciprocal frequency of transverse moving: 58HZ, winding speed: 986 ms/min, oil concentration: 13%, oil preparation oil applying rate: 0.85%.

Described PA66 undrawn yarn, fiber number is 210dtex；Ultimate strength is 350cN, strongly CV < 8%, and elongation at break is 230%, elongation at break CV < 8%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 280cN, and extension at break is 160%.

Step 2, rove

Rove combed long staple cotton, buys from market；

Described combed long staple cotton, cotton quality: 137A；Cotton sliver fiber upper half mean length 33-35mm, the short fibre of below 16.5mm Dimension is less than 6.5%, mic value A level (3.7-4.2)；

Described combed long staple cotton, quantitative 3.25g/ rice, twist factor 95.

Step 3, spinning frame are transformed

Using FA506 type spinning frame, both sides install hanging wire frame additional,

Described spinning frame, also includes lever jack, tensioner, godet roller, front leather roller；

Described lever jack, uses hollow chromium-plated tube, and seal wire hooks autonomous Design, uses iron bar to bend rear chromium plating, and advantage does not twine flower, no Getting rusty, friction is few.

Described tensioner, controls with tension piece natural pressure, and weight 3g, Tensity size can change pressure as requested Sheet, easy to adjust.

Described godet roller, freely rotatable plough groove type aluminum alloy wheel, lightweight, rotate flexibly, diameter uses 37mm instead from 28mm Major diameter, it is not easy to running silk, position can regulate, regulation is fixed with nut after putting in place, will not change.

Described godet roller, as shown in Figure 1, including godet roller body 1, a diameter of 37mm of godet roller body 1, godet roller The centre of body 1 is provided with axis hole 2, and godet roller body 1 is along the circumferential direction provided with annular seal wire groove 3, and annular seal wire groove 3 includes Left seal wire face 4, right seal wire face 5 and kerve 6, left seal wire face 4 and right seal wire face 5 are about longitudinal neutral surface pair of godet roller body 1 Claiming to arrange, left seal wire face 4 is the stepped of three rank, and cascaded surface is 55 degree with the angle of the axis of axis hole 2, at the terraced angle of ladder is Arc shape, the bottom section of kerve 6 is downward arc, and the cross sectional shape of kerve 6 is dovetail channel-shaped, godet roller body 1 top Be respectively arranged at two ends with left redundant ring 7 and right redundant ring 8, left redundant ring 7 and right redundant ring 8 longitudinal direction about godet roller body 1 Neutral surface is symmetrical arranged, and the cross sectional shape of left redundant ring 7 and right redundant ring 8 is hook-shaped.

Described front leather roller, hardness 80, butyronitrile material or other high-abrasive materials.

Step 4, the feeding of PA66 undrawn yarn

PA66UDY is wound on silk cylinder, is hung over by silk cylinder on hanging wire frame, and filament winding crosses lever jack---seal wire hook---, and tension force fills Putting---godet roller----entrance front leather roller, during feeding, the tensioned device of tension force of silk controls, tension force 3g；Silk front end is front Between roller and front leather roller, pull silk continuously output Tong Bu with combed long staple cotton by the rotation of front roller.

Step 5, spun yarn

Combed long staple cotton, the front leather roller at spinning frame is in PA66 undrawn yarn and converges, yarn roller centre-to-centre spacing proparea 20mm, sieve Draw centre-to-centre spacing back zone 40mm, back zone drafting multiple 1.28 times, front roller speed 150 revs/min；Roving twist factor 95；Bao Mianchong Amount percentage ratio 22%, is uniformly coated with, occurs without naked silk；Godet roller adjusts in fixed position, it is ensured that in combing when front leather roller exports The centre of long-staple cotton, front roller pulls the output of silk and combed long staple cotton simultaneously, and during twisting, cotton fiber wraps uniformly It is rolled in the outer layer of silk；

Simultaneously, ramie yarn twist is 620 twists/m, rings φ 42mm Plane Ring, wire loop 6802 type 1/0-4/0 in cladding twisting Number.

Step 6, sizing

Vacuum and steam is shaped, vapor (steam) temperature 90 degree.

Step 7, automatic winding

Molding balance pressure 0.25MPa, tension force: cylinder yarn length less than 20% tension parameters 10, length 20-90% tension parameters 13, Length 90-100% tension parameters 16(length refers to that each yarn is a circulation from starting to spin full cylinder, and each circulation is according to weight Amount or length set)；

Splicer model is this pellet 690 beautiful；Sth. made by twisting lumen type number is 51w2.

Step 8, packaging

Packed in cases, determines weight 20 kilograms, cylinder yarn outsourcing sealed plastic bag, built-in 8 ± 2g anti-blushing agent one bag.

The production technology of the RING SPINNING elastic force weft yarn that embodiment 2 one kinds is heat-resist

Specifically include following steps:

Step one, the preparation of PA66 undrawn yarn

Preparation method, with embodiment 1, only changes following steps:

(5) spinning, cooling molding

Assembly preheating temperature: 320 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 23 revs/min, cross air blasting wind speed 1.3 meter per seconds, cross air blasting pathogenic wind-warm: 25 DEG C, rheumatism 70%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 70HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 70HZ, friction roller frequency: 70HZ, reciprocal frequency of transverse moving: 61HZ, winding speed: 989 ms/min, oil concentration: 14%, oil preparation oil applying rate: 0.9%.

Described PA66 undrawn yarn, fiber number is 230dtex；Ultimate strength is 400cN, strongly CV < 8%, and elongation at break is 280%, elongation at break CV < 8%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 330cN, and extension at break is 210%.

Step 2, rove

Rove combed long staple cotton, buys from market；

Described combed long staple cotton, cotton quality: 137A；Cotton sliver fiber upper half mean length 33-35mm, the short fibre of below 16.5mm Dimension is less than 6.5%, mic value A level (3.7-4.2)；

Described combed long staple cotton, quantitative 3.45g/ rice, twist factor 105.

Step 3, spinning frame are transformed

With embodiment 1, only change arranged below:

Described tensioner, controls with tension piece natural pressure, weight 4g.

Described front leather roller, hardness 83；

Step 4, the feeding of PA66 undrawn yarn

PA66UDY is wound on silk cylinder, is hung over by silk cylinder on hanging wire frame, and filament winding crosses lever jack---seal wire hook---, and tension force fills Put---godet roller----entrance front leather roller,

During feeding, the tensioned device of tension force of silk controls, tension force 4g；Silk front end, between front roller and front leather roller, is passed through The rotation of front roller pulls silk continuously output Tong Bu with combed long staple cotton.

Step 5, spun yarn

Combed long staple cotton, the front leather roller at spinning frame is in PA66 undrawn yarn and converges, yarn roller centre-to-centre spacing proparea 20mm, sieve Draw centre-to-centre spacing back zone 40mm, back zone drafting multiple 1.43 times, front roller speed 160 revs/min；Roving twist factor 105；Bao Mianchong Amount percentage ratio 25%, is uniformly coated with, occurs without naked silk；Godet roller adjusts in fixed position, it is ensured that in combing when front leather roller exports The centre of long-staple cotton, front roller pulls the output of silk and combed long staple cotton simultaneously, and during twisting, cotton fiber wraps uniformly It is rolled in the outer layer of silk；

Simultaneously, ramie yarn twist is 720 twists/m, rings φ 42mm Plane Ring, wire loop 6802 type 1/0-4/0 in cladding twisting Number.

Step 6, sizing

Vacuum and steam is shaped, vapor (steam) temperature 100 degree.

Step 7, automatic winding

Molding balance pressure 0.38MPa,

Tension force: cylinder yarn length less than 20% tension parameters 12, length 20-90% tension parameters 15, length 90-100% tension parameters 18(length refers to that each yarn is a circulation from starting to spin full cylinder, and each circulation sets according to weight or length)；

Splicer model is this pellet 690 beautiful；Sth. made by twisting lumen type number is 51w2.

Step 8, packaging

Packed in cases, determines weight 20 kilograms, cylinder yarn outsourcing sealed plastic bag, built-in 8 ± 2g anti-blushing agent one bag.

The production technology of the RING SPINNING elastic force weft yarn that embodiment 3 one kinds is heat-resist

Specifically include following steps:

Step one, the preparation of PA66 undrawn yarn

Preparation method, with embodiment 1, only changes following steps:

(5) spinning, cooling molding

Assembly preheating temperature: 325 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 23.2 revs/min, cross air blasting wind Speed 1.4 meter per seconds, cross air blasting pathogenic wind-warm: 27 DEG C, rheumatism 72%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 71HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 71HZ, friction roller frequency: 71HZ, reciprocal frequency of transverse moving: 62HZ, winding speed: 991 ms/min, oil concentration: 14.5%, oil preparation oil applying rate: 0.92%.

Described PA66 undrawn yarn, fiber number is 250dtex；Ultimate strength is 450cN, strongly CV < 8%, and elongation at break is 330%, elongation at break CV < 8%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 380cN, and extension at break is 260%.

Step 2, rove

Rove combed long staple cotton, buys from market；

Described combed long staple cotton, cotton quality: 137A；Cotton sliver fiber upper half mean length 33-35mm, the short fibre of below 16.5mm Dimension is less than 6.5%, mic value A level (3.7-4.2)；

Described combed long staple cotton, quantitative 3.55g/ rice, twist factor 110.

Step 3, spinning frame are transformed

With embodiment 1, only change arranged below:

Described tensioner, controls with tension piece natural pressure, weight 4.2g；

Described front leather roller, hardness 84.

Step 4, the feeding of PA66 undrawn yarn

PA66UDY is wound on silk cylinder, is hung over by silk cylinder on hanging wire frame, and filament winding crosses lever jack---seal wire hook---, and tension force fills Put---godet roller----entrance front leather roller,

During feeding, the tensioned device of tension force of silk controls, tension force 4.2g；Silk front end is between front roller and front leather roller, logical The rotation crossing front roller pulls silk continuously output Tong Bu with combed long staple cotton.

Step 5, spun yarn

Combed long staple cotton, the front leather roller at spinning frame is in PA66 undrawn yarn and converges, yarn roller centre-to-centre spacing proparea 20mm, sieve Draw centre-to-centre spacing back zone 40mm, back zone drafting multiple 1.47 times, front roller speed 165 revs/min；Roving twist factor 109；Bao Mianchong Amount percentage ratio 26%, is uniformly coated with, occurs without naked silk；Godet roller adjusts in fixed position, it is ensured that in combing when front leather roller exports The centre of long-staple cotton, front roller pulls the output of silk and combed long staple cotton simultaneously, and during twisting, cotton fiber wraps uniformly It is rolled in the outer layer of silk；

Simultaneously, ramie yarn twist is 760 twists/m, rings φ 42mm Plane Ring, wire loop 6802 type 1/0-4/0 in cladding twisting Number.

Step 6, sizing

Vacuum and steam is shaped, vapor (steam) temperature 105 degree.

Step 7, automatic winding

Molding balance pressure 0.43MPa,

Tension force: cylinder yarn length less than 20% tension parameters 13, length 20-90% tension parameters 16, length 90-100% tension parameters 19(length refers to that each yarn is a circulation from starting to spin full cylinder, and each circulation sets according to weight or length)；

Splicer model is this pellet 690 beautiful；Sth. made by twisting lumen type number is 51w2.

Step 8, packaging

Packed in cases, determines weight 20 kilograms, cylinder yarn outsourcing sealed plastic bag, built-in 8 ± 2g anti-blushing agent one bag.

The production technology of the RING SPINNING elastic force weft yarn that embodiment 4 one kinds is heat-resist

Step one, the preparation of PA66 undrawn yarn

Preparation method, with embodiment 1, only changes following steps:

(5) spinning, cooling molding

Assembly preheating temperature: 330 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 23.5 revs/min, cross air blasting wind Speed 1.5 meter per seconds, cross air blasting pathogenic wind-warm: 28 DEG C, rheumatism 75%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 73HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 72HZ, friction roller frequency: 72HZ, reciprocal frequency of transverse moving: 64HZ, winding speed: 992 ms/min, oil concentration: 15%, oil preparation oil applying rate: 0.95%.

Described PA66 undrawn yarn, fiber number is 243dtex；Ultimate strength is 426cN, strongly CV < 8%, and elongation at break is 304%, elongation at break CV < 8%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 353cN, and extension at break is 232%.

Step 2, rove

Rove combed long staple cotton, buys from market；

Described combed long staple cotton, cotton quality: 137A；Cotton sliver fiber upper half mean length 33-35mm, the short fibre of below 16.5mm Dimension is less than 6.5%, mic value A level (3.7-4.2)；

Described combed long staple cotton, quantitative 3.65g/ rice, twist factor 115.

Step 3, spinning frame are transformed

With embodiment 1, only change arranged below:

Described tensioner, controls with tension piece natural pressure, weight 5g；

Described front leather roller, hardness 86.

Step 4, the feeding of PA66 undrawn yarn

PA66UDY is wound on silk cylinder, is hung over by silk cylinder on hanging wire frame, and filament winding crosses lever jack---seal wire hook---, and tension force fills Put---godet roller----entrance front leather roller,

During feeding, the tensioned device of tension force of silk controls, tension force 5g；Silk front end, between front roller and front leather roller, is passed through The rotation of front roller pulls silk continuously output Tong Bu with combed long staple cotton.

Step 5, spun yarn

Combed long staple cotton, the front leather roller at spinning frame is in PA66 undrawn yarn and converges, yarn roller centre-to-centre spacing proparea 20mm, sieve Draw centre-to-centre spacing back zone 40mm, back zone drafting multiple 1.53 times, front roller speed 170 revs/min；Roving twist factor 115；Bao Mianchong Amount percentage ratio 28%, is uniformly coated with, occurs without naked silk；Godet roller adjusts in fixed position, it is ensured that in combing when front leather roller exports The centre of long-staple cotton, front roller pulls the output of silk and combed long staple cotton simultaneously, and during twisting, cotton fiber wraps uniformly It is rolled in the outer layer of silk；

Simultaneously, ramie yarn twist is 820 twists/m, rings φ 42mm Plane Ring, wire loop 6802 type 1/0-4/0 in cladding twisting Number.

Step 6, sizing

Vacuum and steam is shaped, vapor (steam) temperature 110 degree.

Step 7, automatic winding

Molding balance pressure 0.5MPa；

Tension force: cylinder yarn length less than 20% tension parameters 14, length 20-90% tension parameters 17, length 90-100% tension parameters 20(length refers to that each yarn is a circulation from starting to spin full cylinder, and each circulation sets according to weight or length)；

Splicer model is this pellet 690 beautiful；Sth. made by twisting lumen type number is 51w2.

Step 8, packaging

Packed in cases, determines weight 20 kilograms, cylinder yarn outsourcing sealed plastic bag, built-in 8 ± 2g anti-blushing agent one bag.

Elastic force weft yarn prepared by embodiment of the present invention 1-4, performance indications are shown in Table 2.

The performance indications of elastic force weft yarn prepared by table 2 present invention

Elastic force weft yarn prepared by the present invention, fiber number is that 20 ± 2 English prop up, single thread ultimate strength: 380 ± 50cN, strongly CV:＜ 8%； Elongation at break is 280 ± 50%, percentage elongation CV ＜ 8%；

Thermostability: after placing 4 minutes under the conditions of 240 DEG C, single thread ultimate strength 330 ± 50cN, loses 11.6-14.5%；Fracture is stretched Long rate 210 ± 50%, loses 20-25%；

Elastic force weft yarn prepared by the present invention, when being used for weaving radial-ply tyre cord fabric, the efficiency that uses that jet cloth is woven when making is high, latitude stops Few；100000 latitudes stop less than 5 times；Can fully keep fabric tissue stable, cord fabric immersing glue process disclosure satisfy that expanding requirement, expanding Cloth web stabilization constantization is kept after scope of design impregnation.

Except as otherwise noted, the percent employed in the present invention is percetage by weight, ratio of the present invention, all For mass ratio.

The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The skill of the industry The art personnel simply explanation it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description The principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these Changes and improvements both fall within scope of the claimed invention.Claimed scope by appending claims and Its equivalent defines.

Claims (10)

1. a heat-resist RING SPINNING elastic force weft yarn, it is characterised in that: described elastic force weft yarn, fiber number is that 20 ± 2 English prop up.

A kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 1, it is characterised in that: described elastic force latitude Yarn, single thread ultimate strength: 380 ± 50cN, elongation at break is 280 ± 50%.

A kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 1, it is characterised in that: described elastic force latitude Yarn, strongly CV ＜ 8%, percentage elongation CV ＜ 8%.

4. the production technology of a heat-resist RING SPINNING elastic force weft yarn, it is characterised in that: described production technology, including PA66 The preparation of undrawn yarn, rove, the feeding of PA66 undrawn yarn, spun yarn.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 4, it is characterised in that: institute Stating PA66 undrawn yarn, fiber number is 230 ± 20dtex.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 4, it is characterised in that: institute State rove, use combed long staple cotton, cotton quality: 137A；Cotton sliver fiber upper half mean length 33-35mm, below 16.5mm Chopped fiber is less than 6.5%, mic value A level；Quantitative 3.45 ± 0.2g/ rice, twist factor 105 ± 10.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 4, it is characterised in that: institute State spun yarn, yarn roller centre-to-centre spacing proparea 20mm, ratch back zone 40mm, back zone drafting multiple 1.28-1.53 times, front sieve Pulling rate degree 160 ± 10 revs/min.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 4, it is characterised in that:

Described spun yarn, is uniformly coated with combed long staple cotton outside PA66 undrawn yarn, the cotton percentage by weight 25 ± 5% of bag, ramie yarn twist It it is 720 ± 100 twists/m.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 4, it is characterised in that: institute State the feeding of PA66 undrawn yarn, the tension force 2.8-5.2g of silk.

The production technology of a kind of heat-resist RING SPINNING elastic force weft yarn the most according to claim 4, it is characterised in that: Described production technology, also includes automatic winding；Described automatic winding, molding balance pressure 0.38 ± 0.12MPa；Tension force controls For: cylinder yarn length less than 20% tension parameters 10-14, length 20-90% tension parameters 13-17, length 90-100% tension parameters 16-20；

Described spun yarn spinning frame, including tensioner, godet roller, front leather roller；Described tensioner, uses tension piece natural pressure Control, weight 2-5g；Described godet roller, a diameter of 37mm；Described front leather roller, hardness 83 ± 3.