CN106120001A - A kind of high-tenacity heat-resisting PA66 undrawn yarn and production technology thereof - Google Patents

Abstract

The present invention provides a kind of high-tenacity heat-resisting PA66 undrawn yarn, and described undrawn yarn, fiber number is 230 ± 20dtex；The present invention also provides for the production technology of a kind of high-tenacity heat-resisting PA66 undrawn yarn, and described production technology, including spinning, cooling molding；Described spinning, cooling molding, assembly preheating temperature is 314 325 DEG C；Dosing pump rotating speed is 22.4 23.6 revs/min.The PA66 undrawn yarn that the present invention prepares, fiber number is 230 ± 20dtex；The PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength is 400 460cN, strongly CV is 5.5 8%, and elongation at break is 230 290%, and elongation at break CV is 5.0 8%；The PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces by 12 18%；Extension at break reduces by 12.1 19%.

Description

A kind of high-tenacity heat-resisting PA66 undrawn yarn and production technology thereof

Technical field

The present invention provides a kind of high-tenacity heat-resisting PA66 undrawn yarn and production technology thereof, can be used for 20 high-tenacity bullets Power weft yarn yarn core, belongs to spining technology field.

Background technology

Nylon (PA) fiber formal name used at school is polyamide (polyamide) fiber, its originally by E.I.Du Pont Company produced poly-oneself two The trade name of acyl hexamethylene diamine, is commonly referred to as nylon six or six (Nylon 66).Fypro is first synthesising macromolecule copolymer The synthetic fibers goods of commercialization, it is to be invented poly-hexamethyl adipyl in nineteen thirty-seven by the research of du pont company's Tomas Carothers Amine (i.e. nylon six or six acyl), thus open the page 1 of synthetic fibers, it is still the representative of Fypro so far.

PA66 undrawn yarn, can be used for 20 elastic force weft yarn yarn cores, is further used for producing tyre cord, prior art When spinning PA66 undrawn yarn, have 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 high-tenacity heat-resisting PA66 undrawn yarn and life thereof Production. art, to realize following goal of the invention:

(1) the PA66 undrawn yarn that the present invention prepares, fiber number is 230 ± 20dtex；

(2) the PA66 undrawn yarn that the present invention prepares, ultimate strength reaches 400-460cN, and elongation at break reaches 230-290%,

(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces 12-18%；Disconnected Split percentage elongation and reduce 12.1-19%；

(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, and row yielding reaches 102%.

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

A kind of high-tenacity heat-resisting PA66 undrawn yarn, described undrawn yarn, fiber number is 230 ± 20dtex.

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

Described undrawn yarn, ultimate strength reaches 400-460cN, and elongation at break reaches 230-290%；Ultimate strength CV≤8%；Fracture Percentage elongation CV≤8%.

Described undrawn yarn, ultimate strength is preferably 450-459cN, and elongation at break is preferably 280-290%.

The production technology of a kind of high-tenacity heat-resisting PA66 undrawn yarn, described production technology, including spinning, cooling molding； Described spinning, cooling molding, assembly preheating temperature is 314-325 DEG C；Dosing pump rotating speed is 22.4-23.6 rev/min.

Described spinning, cooling molding, assembly preheating temperature is preferably as 319-321 DEG C；Dosing pump rotating speed is preferably 22.7- 23.2 revs/min.

Described spinning, cooling molding, cross air blasting wind speed 1.24-1.36 meter per second, cross air blasting pathogenic wind-warm: 21-30 DEG C, wind wet Degree is 60-80%.

Described cross air blasting wind speed is preferably 1.28-1.33 meter per second；

Described production technology, also includes winding, and described winding, oil concentration is 13.4-14.8%；Winding speed: 983-997 rice/ Minute.

Described winding, oil concentration is preferably 13.8-14.3%；Winding speed: 988-993 m/min.

Described winding, upper draw-off godet frequency: 66-73HZ, lower draw-off godet frequency: 62-76 HZ, friction roller frequency: 67- 78HZ, reciprocal frequency of transverse moving: 53-70HZ, oil preparation oil applying rate: 0.86-0.96%；Described oil preparation, kind is this oil preparation of bamboo.

Described oil preparation, kind is preferably this F6258 of bamboo, this F5178 of bamboo.

Described upper draw-off godet frequency is preferably: 69-71HZ, and lower draw-off godet frequency is preferably: 67-70 HZ, friction roller frequency Being preferably: 68-72HZ, reciprocal frequency of transverse moving is preferably: 59-63HZ.

Described production technology, also includes melting；Described melted, spinning melt temperature 286-312 DEG C；Described melted, use Screw extruder carries out extrusion molten；Described extrusion molten, district's temperature is 301-309 DEG C；Two district's temperature are 288-307 DEG C； Three district's temperature are 288-305 DEG C；Four district's temperature are 282-304 DEG C；Five district's temperature are 282-295 DEG C；Flange temperature is 280-305 ℃；Spin manifold temperature is 285-298 DEG C.

Described melted, spinning melt temperature is preferably 287-293 DEG C；

Described extrusion molten, is preferably: district's temperature is 301-305 DEG C；Two district's temperature are 291-295 DEG C；Three district's temperature are 288-291℃；Four district's temperature are 286-289 DEG C；Five district's temperature are 285-289 DEG C；Flange temperature is 287-289 DEG C；Casing temperature Degree is for 287-291 DEG C.

Described production technology, also includes assembling components；Described assembling components, adds 150 mesh stainless (steel) wires, not before spinneret Before rust steel mesh, make filter course with 60 mesh metal sands；Described spinneret, specification is 32 hole × 0.3 × 0.6mm；

Described production technology, also includes being dried, described dry, and baking temperature 113-132 DEG C, is dried 5-5.5 hour drying time Vacuum >=-0.09MPa, be dried to section moisture be 600-700ppm.

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 230 ± 20dtex；For 20 elastic force weft yarn yarn cores；

(2) the PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength is 400-460cN, strongly CV is 5.5-8%, Elongation at break is 230-290%, and elongation at break CV is 5.0-8%；

(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength is 336-404cN, Reduce 12-18%；Extension at break is 192-254%, reduces 12.1-19%；

(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 1.2-3%；

(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 8-10%.

(6) spinning technique of the present invention, thoroughly solves strand and jumps out problem, stops appearance without silk noil, raising product matter Amount and row yielding, thoroughly solve to jump out problem because of strand and the phenomenon without silk noil occur, the probability ＜ 1% without silk noil, row yielding occur Reach 102%.

Accompanying drawing explanation

Accompanying drawing 1 is the structural representation of PA66 undrawn yarn of the present invention winding silk pressing rod localizer；

In figure,

1-oil-out；2-wears silk oil mouth；3-silk thread；4-hinged seat；5-jointed shaft；6-silk pressing rod hinged end；7-gum cover；8-presses Silk rod Guan Bi end；9-fixes seat.

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 1 one kinds of high-tenacity heat-resisting PA66 undrawn yarns of embodiment

Comprise the following steps:

(1) material choice

Use PA66 resin slicer, viscosity 2.65-3.1；

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 125 DEG C, 5.3 hours drying times, dry Dry vacuum is-0.082MPa, be dried to section moisture be 650ppm.

(3) extrusion molten

Spinning melt temperature 290 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 32 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: 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, described up-coiler through cross air blasting cooling molding by interlayer heat pipe path, installs winding silk pressing Rod localizer；

Upper draw-off godet frequency: 70HZ, lower draw-off godet frequency: 70HZ, friction roller frequency: 70HZ, reciprocal frequency of transverse moving: 61HZ, volume Around speed: 989 ms/min, oil concentration (this oil preparation of bamboo): 14%, oil preparation oil applying rate: 0.9%.

As shown in Figure 1, described winding silk pressing rod localizer, wear silk oil mouth 2, institute including be arranged on oil-out 1 side State oil-out 1 opposite side and be provided with silk pressing bar device,

Described silk pressing bar device includes silk pressing rod, fixing seat 9 and hinged seat 4, and described silk pressing rod has silk pressing rod Guan Bi end 8 and pressure Silk rod hinged end 6, described silk pressing rod hinged end 6 is hinged on hinged seat 4 by jointed shaft 5.

Described hinged seat 4 is fixedly installed on the opposite side of oil-out 1.

Gum cover 7 can be provided with on described silk pressing rod, described in wear the upper end of silk oil mouth 2 there is oil nozzle gap, facilitate silk thread 3 to wear Cross.

Being fixedly installed fluted on fixing seat 9, described groove can accommodate silk pressing rod Guan Bi end 8 and enter.

Silk thread 3 enters in oil nozzle gap, and silk pressing rod pressing silk thread 3 prevents silk thread 3 from deviating from from oil nozzle gap, thus jumps Silk.

The production technology of 2 one kinds of high-tenacity heat-resisting PA66 undrawn yarns of embodiment

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 113 DEG C, 5 hours drying times, is dried Vacuum is-0.079MPa, be dried to section moisture be 600ppm.

(3) extrusion molten

Spinning melt temperature 286 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: 314 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 22.4 revs/min, cross air blasting wind Speed 1.24 meter per seconds, cross air blasting pathogenic wind-warm: 21 DEG C, rheumatism 60%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 66HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 62HZ, friction roller frequency: 67HZ, reciprocal frequency of transverse moving: 53HZ, winding speed: 983 ms/min, oil concentration (bamboo This oil preparation): 13.4%, oil preparation oil applying rate: 0.86%.

The production technology of 3 one kinds of high-tenacity heat-resisting PA66 undrawn yarns of embodiment

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 117 DEG C, 5.2 hours drying times, dry Dry vacuum is-0.081MPa, be dried to section moisture be 625ppm.

(3) extrusion molten

Spinning melt temperature 297 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: 319 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 23.2 revs/min, cross air blasting wind Speed 1.32 meter per seconds, cross air blasting pathogenic wind-warm: 27 DEG C, rheumatism 73%.

(6) winding

Strand enters up-coiler, upper draw-off godet frequency: 69HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path Dish frequency: 65HZ, friction roller frequency: 73HZ, reciprocal frequency of transverse moving: 65HZ, winding speed: 993 ms/min, oil concentration (bamboo This oil preparation): 14.3%, oil preparation oil applying rate: 0.93%.

The production technology of 4 one kinds of high-tenacity heat-resisting PA66 undrawn yarns of embodiment

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 132 DEG C, 5.5 hours drying times, dry Dry vacuum is-0.085MPa, be dried to section moisture be 700ppm.

(3) extrusion molten

Spinning melt temperature 312 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: 325 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 23.6 revs/min, cross air blasting wind Speed 1.36 meter per seconds, cross air blasting pathogenic wind-warm: 30 DEG C, rheumatism 80%.

(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: 76HZ, friction roller frequency: 78HZ, reciprocal frequency of transverse moving: 70HZ, winding speed: 997 ms/min, oil concentration (bamboo This oil preparation): 14.8%, oil preparation oil applying rate: 0.96%.

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 kind 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 kind of oil preparation, carries out Single factor analysis is tested, and the results are shown in Table 6.

The kind 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, oil preparation kind is preferably bamboo basis 6013, bamboo basis 6014；Further, preferably bamboo this 6013.

The PA66 undrawn yarn of described embodiment 8 preparation, fiber number is 245dtex.

The concentration optimization experiment of embodiment 11 winding speed and oil preparation

The preparation method of employing PA66 undrawn yarn described in embodiment 3, only changes step (6) winding, winding speed and oil preparation Concentration, carry out double factor analysis experiment, the results are shown in Table 7.

The concentration of table 7 oil preparation 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, the concentration of oil preparation is preferably 13.8-14.3%, and winding speed is preferably 988-993 m/min； Further, the concentration of oil preparation is preferably 13.8%, and winding speed is preferably 988 ms/min.

The PA66 undrawn yarn of described embodiment 14 preparation, fiber number is 243dtex.

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 high-tenacity heat-resisting PA66 undrawn yarn, it is characterised in that: described undrawn yarn, fiber number is 230 ± 20dtex.

A kind of high-tenacity heat-resisting PA66 undrawn yarn the most according to claim 1, it is characterised in that: described undrawn yarn, Ultimate strength reaches 400-460cN, and elongation at break reaches 230-290%；Ultimate strength CV≤8%；Elongation at break CV≤8%.

3. the production technology of a high-tenacity heat-resisting PA66 undrawn yarn, it is characterised in that: described production technology, including spinning, Cooling molding；Described spinning, cooling molding, assembly preheating temperature is 314-325 DEG C；Dosing pump rotating speed is 22.4-23.6 rev/min Clock.

The production technology of a kind of high-tenacity the most according to claim 3 heat-resisting PA66 undrawn yarn, it is characterised in that: described Spinning, cooling molding, cross air blasting wind speed 1.24-1.36 meter per second, cross air blasting pathogenic wind-warm: 21-30 DEG C, the humidity of wind is 60-80%.

The production technology of a kind of high-tenacity the most according to claim 3 heat-resisting PA66 undrawn yarn, it is characterised in that: described Production technology, also includes winding, and described winding, oil concentration is 13.4-14.8%；Winding speed: 983-997 m/min.

The production technology of a kind of high-tenacity the most according to claim 5 heat-resisting PA66 undrawn yarn, it is characterised in that: described Winding, oil concentration is preferably 13.8-14.3%；Winding speed: 988-993 m/min.

The production technology of a kind of high-tenacity the most according to claim 5 heat-resisting PA66 undrawn yarn, it is characterised in that: described Winding, upper draw-off godet frequency: 66-73HZ, lower draw-off godet frequency: 62-76 HZ, friction roller frequency: 67-78HZ, reciprocal traversing frequency Rate: 53-70HZ, oil preparation oil applying rate: 0.86-0.96%；Described oil preparation, kind is this oil preparation of bamboo.

The production technology of a kind of high-tenacity the most according to claim 7 heat-resisting PA66 undrawn yarn, it is characterised in that: described Oil preparation, kind is preferably this F6258 of bamboo, this F5178 of bamboo.

The production technology of a kind of high-tenacity the most according to claim 3 heat-resisting PA66 undrawn yarn, it is characterised in that: described Production technology, also includes melting；Described melted, spinning melt temperature 286-312 DEG C；Described melted, use screw extruder to enter Row extrusion molten；Described extrusion molten, district's temperature is 301-309 DEG C；Two district's temperature are 288-307 DEG C；Three district's temperature are 288-305℃；Four district's temperature are 282-304 DEG C；Five district's temperature are 282-295 DEG C；Flange temperature is 280-305 DEG C；Casing temperature Degree is for 285-298 DEG C.

The production technology of a kind of high-tenacity the most according to claim 3 heat-resisting PA66 undrawn yarn, it is characterised in that: institute State production technology, also include assembling components；Described assembling components, adds 150 mesh stainless (steel) wires before spinneret, before stainless (steel) wire, Filter course is made with 60 mesh metal sands；Described spinneret, specification is 32 hole × 0.3 × 0.6mm；

Described production technology, also includes being dried, described dry, and baking temperature 113-132 DEG C, is dried 5-5.5 hour drying time Vacuum >=-0.09MPa, be dried to section moisture be 600-700ppm.