CN106119999A - A kind of PA66 undrawn yarn and production technology thereof propping up elastic force weft yarn yarn core for height - Google Patents

Abstract

The present invention provides a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height, described undrawn yarn, and fiber number is 145 ± 20dtex；The present invention also provides for the production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height, and described production technology, including spinning, cooling molding；Described spinning, cooling molding, assembly preheating temperature is 310 326 DEG C；Dosing pump rotating speed is 14.0 16.0 revs/min；The PA66 undrawn yarn that the present invention prepares, fiber number is 145 ± 20dtex；Ultimate strength is 230 290cN, and elongation at break is 260 320%；Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces by 12 27%；Elongation at break reduces by 12 28%；The PA66 undrawn yarn that the present invention prepares, denier irregularity is 1.24 3%；Strongly CV is 5.3 8%；Elongation at break CV is 5.0 8%.

Description

A kind of PA66 undrawn yarn and production technology thereof propping up elastic force weft yarn yarn core for height

Technical field

The present invention provides a kind of PA66 undrawn yarn and production technology thereof propping up elastic force weft yarn yarn core for height, for 26 Elastic force weft yarn yarn core, belongs to spining technology field.

Background technology

Nylon (Nylon) fiber formal name used at school is polyamide (polyamide) fiber, and it was gathered oneself by what E.I.Du Pont Company produced originally The trade name of two acyl hexamethylene diamines, is commonly referred to as nylon six or six (Nylon 66).Fypro is first synthesis high molecular polymerization The synthetic fibers goods of thing commercialization, its be nineteen thirty-seven by du pont company's Tomas Carothers research invent poly-hexamethyl oneself two Amide (i.e. nylon six or six acyl), thus open the page 1 of synthetic fibers, it is still the representative of Fypro so far.

Prior art, when spinning PA66 undrawn yarn, has the disadvantage that

(1) ultimate strength and elongation at break are the most relatively low；

(2) poor heat resistance；

(3) index is unstable, and fiber number is uneven；

(4) in prior art, end breakage rate is 30%, and assembly uses the cycle to be 10 days；

(5) silk pressing rod in use auto-changing angles and positions below oil nozzle, strand is easily jumped out at oil nozzle, often goes out Now without silk noil, affect product quality and row yielding.

Summary of the invention

For solving the deficiency that prior art exists, the present invention provides a kind of and props up the PA66 of elastic force weft yarn yarn core for height and do not draw Stretch silk and production technology thereof, to realize following goal of the invention:

(1) the PA66 undrawn yarn that the present invention prepares, fiber number is 145 ± 20dtex；

(2) the PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength reaches 230-290cN, elongation at break reaches 260- 320%；

(3) the PA66 undrawn yarn that the present invention prepares, heat-resist；

(4) the PA66 undrawn yarn that the present invention prepares, index is stable, and fiber number is uniform, denier irregularity≤3%；Strongly CV≤8%； Elongation at break CV≤8%；

(5) the PA66 undrawn yarn that the present invention prepares, broken end reduces 2 times, and element period extends 3 times, reaches 30 days, and qualification rate reaches More than 95%, end breakage rate≤10%；

(6), there is the probability ＜ 1% without silk noil in spinning technique of the present invention；Row yielding reaches 102%.

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

A kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height, described undrawn yarn, fiber number is 145 ± 20dtex.

The following is and the further of technique scheme is improved:

Described undrawn yarn, ultimate strength reaches 230-290cN, and elongation at break reaches 260-320%；Strongly CV≤8%；Extension at break Rate CV≤8%.

Described undrawn yarn, preferably ultimate strength 280-295cN, elongation at break reaches 300-312%；Strongly CV For 5.5-6.5%；Elongation at break CV is 5.5-6.5%.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height, described production technology, including spinning Silk, cooling molding；Described spinning, cooling molding, assembly preheating temperature is 310-326 DEG C；Dosing pump rotating speed is 14.0-16.0 Rev/min.

Described dosing pump rotating speed, preferably 14.8-15.3 rev/min.

Described spinning, cooling molding, cross air blasting wind speed 1.15-1.41 meter per second, cross air blasting pathogenic wind-warm: 18-29 DEG C, wind wet Degree is 58-81%.

Described spinning, cooling molding, cross air blasting wind speed is preferably 1.25-1.32 meter per second, and cross air blasting pathogenic wind-warm is preferably: 23- 27 DEG C, the humidity of wind is preferably 67-73%.

Described production technology, also includes winding, described winding, lower draw-off godet frequency: 63-73HZ, winding speed: 975- 992 ms/min.

Described winding, lower draw-off godet frequency is preferably 68-71 HZ, and winding speed is preferably 986-990 m/min.

Described winding, upper draw-off godet frequency: 63-73HZ, friction roller frequency: 63-75HZ, reciprocal frequency of transverse moving: 55- 65HZ；Oil concentration is 13.2-14.6%, oil preparation oil applying rate: 0.78-0.93%.

Described winding, upper draw-off godet frequency is preferably: 68-71HZ, and friction roller frequency is preferably: 67-70HZ, reciprocal traversing Frequency is preferably: 57-60HZ；Oil concentration is preferably 13.6-14.0%, and oil preparation oil applying rate is preferably: 0.87-0.90%.

Described production technology, also includes melting；Described melted, spinning melt temperature 280-305 DEG C；Described melted, use Screw extruder carries out extrusion molten；Described extrusion molten, district's temperature is 295-312 DEG C；Two district's temperature are 285-301 DEG C； Three district's temperature are 284-302 DEG C；Four district's temperature are 285-300 DEG C；Five district's temperature are 283-301 DEG C；Flange temperature is 282-301 ℃；Spin manifold temperature is 286-304 DEG C.

Described spinning melt temperature, preferably 293-296 DEG C；

Described extrusion molten, preferably one district's temperature is 300-305 DEG C；Two district's temperature are 292-296 DEG C；Three district's temperature are 290- 296℃；Four district's temperature are 290-295 DEG C；Five district's temperature are 291-294 DEG C；Flange temperature is 293-297 DEG C；Spin manifold temperature is 292-296℃。

Described production technology, also includes spinneret 6 assembling components；Described spinneret 6 assembling components, adds 150 before spinneret 6 Mesh stainless (steel) wire 5, before stainless (steel) wire 5, makees filter course with 60 mesh metal sands；Described spinneret 6, specification is 22 holes × 0.3mm ×0.6mm；

Described production technology, also includes material choice and is dried；Described material choice, uses PA66 resin slicer, viscosity 2.65- 3.1；Described resin slicer, oxidation index≤-2, moisture content≤3000 ppm, outward appearance is without black grain, overlength and adhesion section；

Described be dried, baking temperature 110-126 DEG C, 3.5-4.6 hour drying time, be dried vacuum be-0.07～- 0.09MPa, be dried to section moisture be 750-905ppm.

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

(1) the PA66 undrawn yarn that the present invention prepares, fiber number is 145 ± 20dtex；For 26 elastic force weft yarn yarn cores；

(2) the PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength is 230-290cN, elongation at break is 260- 320%；

(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces 12-27%；, Elongation at break reduces 12-28%；

(4) the PA66 undrawn yarn that the present invention prepares, index is stable, and fiber number is uniform, and later process unwinding is good, meets elastic force latitude Yarn yarn core prescription, denier irregularity is 1.24-3%；Strongly CV is 5.3-8%；Elongation at break CV is 5.0-8%；

(5) the PA66 undrawn yarn that the present invention prepares, broken end reduces 2 times, and element period extends 3 times, reaches 30 days, and qualification rate reaches More than 95%, end breakage rate is 7.2-10%；

(6) spinning technique of the present invention, improves product quality and row yielding, thoroughly solves to jump out problem because of strand and oil-free occurs , there is the probability ＜ 1% without silk noil in the phenomenon of silk；Row yielding reaches 102%.

Accompanying drawing explanation

Fig. 1 is the structural representation of spinneret component in spinning technique of the present invention；

Fig. 2 is the structural representation of spinneret in spinning technique of the present invention；

Fig. 3 is the structural representation of plectrum in spinneret component of the present invention；

Fig. 4 is the installment state figure of plectrum in spinneret component of the present invention.

In figure:

1-housing；2-rough sand layer；3-fine sand layer；4-spray webbing hole slot；5-stainless (steel) wire；6-spinneret；61-shifting fork bar；62-U-shaped Fork body；63-presses sheet；631-fixes axle；632-axle sleeve；633-rotating shaft；634-pressing hole.

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.

Embodiment 1 one kinds is for the production technology of the PA66 undrawn yarn of height elastic force weft yarn yarn core

Comprise the following steps:

(1) material choice

Use PA66 resin slicer, viscosity 2.65-3.1；Oxidation index (YI)≤-2, moisture content (ppm)≤3000, appearance requirement Do 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 DEG C, 4 hours drying times, and being dried vacuum is-0.09MPa, is dried to section Moisture be 850ppm.

(3) extrusion molten

Spinning melt temperature 295 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) spinneret component assembles

Add 150 mesh stainless (steel) wires 5 before spinneret 6, before stainless (steel) wire 5, make filter course with 60 mesh metal sands,

The specification of spinneret 6 is 22 hole × 0.3 mm × 0.6mm(draw ratio 1:2).

Described 0.3mm is aperture, 0.6mm hole length；

As shown in Figures 1 and 2, described spinneret component, including housing 1, the end of described housing 1 is fixedly installed spray webbing Plate 6, is disposed with rough sand layer 2 and fine sand layer 3 from top to bottom between described housing 1 and spinneret 6.

Being provided with spray webbing hole slot 4 on described spinneret 6, the surface of described spray webbing hole slot 4 is covered with stainless (steel) wire 5, described not The mesh number of rust steel mesh 5 is 150 mesh.

As shown in accompanying drawing 3 and accompanying drawing 4, between described spray webbing hole slot 4 and stainless (steel) wire 5, it is provided with U-shaped fork body 62, described U Shape fork body 62 connects has shifting fork bar 61, the end of shifting fork bar 61 to be provided with by sheet 63.

It is provided with pressing hole 634 on described spinneret 6, in described pressing hole 634, is fixedly installed fixing axle 631, described Being socketed with axle sleeve 632 on fixing axle 631, described axle sleeve 632 is provided with rotating shaft 633, and described rotating shaft 633 is hinged with shifting fork bar 61； Press sheet 63, stainless (steel) wire 5 can be tilted, thus move to other positions, convenient dismounting.

(5) spinning, cooling molding

Assembly preheating temperature: 320 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 15 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 through cross air blasting cooling molding by interlayer heat pipe path；

Upper draw-off godet frequency: 70HZ, lower draw-off godet frequency: 70HZ, friction roller frequency: 70HZ, reciprocal frequency of transverse moving: 58HZ, volume Around speed: 989 ms/min, oil concentration: 14%, oil preparation oil applying rate: 0.9%.

Embodiment 2 one kinds is for the production technology of the PA66 undrawn yarn of height elastic force weft yarn yarn core

On the basis of embodiment 1, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 1:

(2) it is dried

With VC352 type rotary drum, section is dried；

Drying process is as follows: baking temperature 110 DEG C, 3.5 hours drying times, and being dried vacuum is-0.07MPa, is dried to cutting The moisture of sheet is 750ppm.

(3) melted

Spinning melt temperature 280 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 2 below.

The parameter of table 2 extrusion molten

(5) spinning, cooling molding

Assembly preheating temperature: 310 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 14 revs/min, cross air blasting wind speed 1.15 meter per seconds, cross air blasting pathogenic wind-warm: 18 DEG C, the humidity of wind is 58%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 63HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 63HZ, friction roller frequency: 63HZ, reciprocal frequency of transverse moving: 55HZ, winding speed: 975 ms/min, oil concentration (bamboo This oil preparation): 13.2%, oil preparation oil applying rate: 0.78%.

Embodiment 3 one kinds is for the production technology of the PA66 undrawn yarn of height elastic force weft yarn yarn core

On the basis of embodiment 1, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 1:

(2) it is dried

With VC352 type rotary drum, section is dried；

Drying process is as follows: baking temperature 114 DEG C, 3.7 hours drying times, and being dried vacuum is-0.075MPa, is dried to cutting The moisture of sheet is 775ppm.

(3) melted

Spinning melt temperature 287 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 3 below.

The parameter of table 3 extrusion molten

(5) spinning, cooling molding

Assembly preheating temperature: 317 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 14.8 revs/min, cross air blasting wind Speed 1.24 meter per seconds, cross air blasting pathogenic wind-warm: 21 DEG C, the humidity of wind is 65%.

(6) winding

Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path,

Upper draw-off godet frequency: 66HZ, lower draw-off godet frequency: 68HZ, friction roller frequency: 65HZ, reciprocal frequency of transverse moving: 57HZ, volume Around speed: 986 ms/min, oil concentration (this oil preparation of bamboo): 13.6%, oil preparation oil applying rate: 0.83%.

Embodiment 4 one kinds is for the production technology of the PA66 undrawn yarn of height elastic force weft yarn yarn core

On the basis of embodiment 1, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 1:

(2) it is dried

With VC352 type rotary drum, section is dried；

Drying process is as follows: baking temperature 126 DEG C, 4.6 hours drying times, and being dried vacuum is-0.086MPa, is dried to cutting The moisture of sheet is 905ppm.

(3) melted

Spinning melt temperature 305 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 4 below.

The parameter of table 4 extrusion molten

(5) spinning, cooling molding

Assembly preheating temperature: 326 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 16 revs/min, cross air blasting wind speed 1.41 meter per seconds, cross air blasting pathogenic wind-warm: 29 DEG C, the humidity of wind is 81%.

(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: 73HZ, friction roller frequency: 73HZ, reciprocal frequency of transverse moving: 65HZ, winding speed: 992 ms/min, oil concentration (bamboo This oil preparation): 14.6%, oil preparation oil applying rate: 0.93%.

PA66 undrawn yarn prepared by above-described embodiment 1-4, quality index such as table 5.

The quality index of PA66 undrawn yarn prepared by table 5 present invention

As known from Table 5, embodiment 3 is preferred embodiment.

The concentration single factor analysis experiment of embodiment 5 oil preparation

The preparation method of employing PA66 undrawn yarn described in embodiment 3, only changes step (6) winding, the concentration of oil preparation, carries out Single factor analysis is tested, and the results are shown in Table 6.

The concentration single factor analysis experiment of table 6 oil preparation

Tested by above-mentioned single factor analysis, it is known that, embodiment 3 and embodiment 8 are preferred embodiments, and embodiment 8 is the most real Execute example；I.e. step (6) winding, the concentration of oil preparation is preferably 13.6-14.0%, further, preferably 14.0%；

The PA66 undrawn yarn of described embodiment 8 preparation, fiber number is 150 dtex, Heat-tolerant index (240 DEG C, 4 minutes): fracture Strength reduces by 12.4%；Elongation at break reduces by 12.0%.

11 times draw-off godet frequencies of embodiment and winding speed optimization experiment

Use the preparation method of PA66 undrawn yarn described in embodiment 3, only change step (6) winding, lower draw-off godet frequency and

Winding speed, carries out double factor analysis experiment, the results are shown in Table 7.

7 times draw-off godet frequencies of table and the experiment of winding speed double factor analysis

Tested by above-mentioned single factor analysis, it is known that, embodiment 3 and embodiment 14 are preferred embodiments, and embodiment 14 is most preferably Embodiment；I.e. step (6) winding, lower draw-off godet frequency is preferably 68-71 HZ, and winding speed is preferably 986-990 m/min； Further, upper draw-off godet frequency is preferably 71 HZ, and winding speed is preferably 990 ms/min.

The PA66 undrawn yarn of described embodiment 14 preparation, fiber number is 152dtex, Heat-tolerant index (240 DEG C, 4 minutes): Ultimate strength reduces by 12.1%；Elongation at break reduces by 12.3%.

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. the PA66 undrawn yarn for height elastic force weft yarn yarn core, it is characterised in that: described undrawn yarn, fiber number is 145±20dtex。

A kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 1, it is characterised in that: institute Stating undrawn yarn, ultimate strength reaches 230-290cN, and elongation at break reaches 260-320%；Strongly CV≤8%；Elongation at break CV≤ 8%。

3. the production technology for the PA66 undrawn yarn of height elastic force weft yarn yarn core, it is characterised in that: described production work Skill, including spinning, cooling molding；Described spinning, cooling molding, assembly preheating temperature is 310-326 DEG C；Dosing pump rotating speed is 14.0-16.0 rev/min.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 3, its It is characterised by: described dosing pump rotating speed, preferably 14.8-15.3 rev/min.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 3, its It is characterised by: described spinning, cooling molding, cross air blasting wind speed 1.15-1.41 meter per second, cross air blasting pathogenic wind-warm: 18-29 DEG C, wind wet Degree is 58-81%.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 3, its It is characterised by: described production technology, also includes winding, described winding, lower draw-off godet frequency: 63-73HZ, winding speed: 975- 992 ms/min.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 6, its Being characterised by: described winding, lower draw-off godet frequency is preferably 68-71 HZ, and winding speed is preferably 986-990 m/min.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 6, its It is characterised by: described winding, upper draw-off godet frequency: 63-73HZ, friction roller frequency: 63-75HZ, reciprocal frequency of transverse moving: 55- 65HZ；Oil concentration is 13.2-14.6%, oil preparation oil applying rate: 0.78-0.93%.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 3, its It is characterised by: described production technology, also includes melting；Described melted, spinning melt temperature 280-305 DEG C；Described melted, use Screw extruder carries out extrusion molten；Described extrusion molten, district's temperature is 295-312 DEG C；Two district's temperature are 285-301 DEG C； Three district's temperature are 284-302 DEG C；Four district's temperature are 285-300 DEG C；Five district's temperature are 283-301 DEG C；Flange temperature is 282-301 ℃；Spin manifold temperature is 286-304 DEG C.

The production technology of a kind of PA66 undrawn yarn propping up elastic force weft yarn yarn core for height the most according to claim 3, its It is characterised by: described production technology, also includes spinneret 6 assembling components；Described spinneret 6 assembling components, adds before spinneret 6 150 mesh stainless (steel) wires 5, before stainless (steel) wire 5, make filter course with 60 mesh metal sands；Described spinneret 6, specification be 22 holes × 0.3mm ×0.6mm；

Described production technology, also includes material choice and is dried；Described material choice, cuts with English Weida HV600 PA66 resin Sheet, viscosity 2.65-3.1；Described resin slicer, oxidation index≤-2, moisture content≤3000 ppm, outward appearance is without black grain；

Described be dried, baking temperature 110-126 DEG C, 3.5-4.6 hour drying time, be dried vacuum be-0.07～- 0.09MPa, be dried to section moisture be 750-905ppm.