CN102154724B - Flash polypropylene fiber and preparation method thereof - Google Patents
Flash polypropylene fiber and preparation method thereof Download PDFInfo
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- CN102154724B CN102154724B CN201110129625.4A CN201110129625A CN102154724B CN 102154724 B CN102154724 B CN 102154724B CN 201110129625 A CN201110129625 A CN 201110129625A CN 102154724 B CN102154724 B CN 102154724B
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- polypropylene
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Abstract
The invention provides a three-leaf flash polypropylene fiber. The flash polypropylene fiber is characterized in that: the section of the fiber is in a three-leaf shape; and a fiber forming process comprises the following steps of: adding sorbitol nucleating agent and flow aid dispersant into an isotactic polypropylene slice with melt index of 18 to 35 grams per 10 minutes in a ratio, performing high mixing and extraction melting, performing extrusion from three-leaf spinneret orifices at a low temperature, cooling and molding, stretching and sizing to obtain the polypropylene fiber with flash effect. The polypropylene fiber has obvious flash effect, large specific surface area, strong dirt absorption and soft handfeel, and the mechanical property of the polypropylene fiber is obviously improved; and industrialized production can be performed by using the conventional equipment and processes, and the polypropylene fiber has considerable economic and social benefits.
Description
Technical field:
The invention belongs to fibre in differentiation field, be specifically related to a kind of technology of preparing of flash polypropylene fiber.
Background technology:
Polypropylene fibre has good physical and mechanical properties, and raw material sources are abundant, manufacturing technique is simple, with low cost, so it has broad application prospects at clothes, decoration and industry articles for use.Plain polypropylene fibre section is circular, stiff, the wax-like sense of its feel is strong, so many researchers endeavour the research of profiled PP fiber, the heterotypic fibre of having developed comprises that these fibers such as star, triangle, polygon also can obtain the improvement of gloss effect when improving wax-like sense.But because its kinetic crystallizability of polyacrylic crystallizing power is 6 times of polyester (polyethylene terephthalate), so being easy to obtain large crystallization in spinning moulding, it makes the fiber effect that tarnishes, even triangle is can not produce as the gloss effect of the large lustrous fibre of polyester with the spinning of triangle spinneret orifice, this has limited its application to a certain extent.The present invention starts with and improves the gloss effect of polypropylene fibre from two aspects of special-shaped degree of crystallization control structure and raising spinneret orifice and fiber, by introducing nucleator, control polyacrylic crystalline texture, by increasing the special-shaped degree of spinneret orifice and the special-shaped degree that rational spinning condition improves fiber.In correlative study, have no report.Compare with other flashing fibers, fiber of the present invention has the feature lightweight, intensity is high, and cost is low, and technique is simple, can meet the demand of flash polypropylene fiber on market.
Summary of the invention:
The object of this invention is to provide a kind of flash effect obvious, the polypropylene fibre that mechanical property is better.Goal of the invention is achieved through the following technical solutions;
Flash polypropylene fiber of the present invention, by isotactic polypropylene, nucleator, help flow point powder to make through the special-shaped spinning of melt, drawing process, wherein to be respectively isotactic polypropylene 98%～99.7%, nucleator 0.3～2%, to help the amount of flow point powder be nucleator 1/3～1/2 to the mass fraction of each component, and the monofilament linear density of polypropylene fibre is that 2.65～6.6dtex, degree of profile are greater than 45%, have flash effect.
Wherein, the melt index of described isotactic polypropylene is 18～35g/10min, and nucleator is dibenzyl glucitol derivative class nucleator, and helping flow point powder is the polypropylene wax of molecular weight 4000～6000.
Concrete preparation method of the present invention is: by isotactic polypropylene, nucleator and help flow point powder in proportion in high-speed mixer and mixing, after screw extruding melting, melt equal and quantitative is extruded from the profiled holes of spinnerets, the strand of extruding is cooling in air, oil, by winder winding on bobbin, fiber after balance is stretched, dry, obtains flash polypropylene fiber.Wherein the blending temperature in high mixer is 50～60 ℃, and extrusion molten temperature is 230～250 ℃, and spinning temperature is 240～250 ℃, and draft temperature is 60～80 ℃.
Above-mentionedly state the circular jetting filament plate that spinnerets is diameter 30～45mm, on spinnerets, there are 10～24 spinneret orifices, each spinneret orifice is all with taper guide hole, shape of spinneret is trilobal cross, three blades are arranged radially, angle between blade is 120 degree, and wherein the length-width ratio of two blades is that the length-width ratio of 4～6: 1, one blade is 6: 1.
Compared with prior art the present invention has following good effect:
1, the present invention has the effect of two aspects by introducing nucleator crystallization control structure: the one, improved the gloss effect of fiber, and the 2nd, improved fracture strength and the modulus of fiber.
2, the present invention helps flow point powder to improve nucleator dispersing uniformity by being introduced as polypropylene wax one's own department or unit, has improved polyacrylic high fluidity, and fiber can and obtain higher special-shaped degree at lower temperature compacted under,
3, the present invention is simple with spinnerets and microcellular structure thereof, processing, easy to clean.Nucleator used is nontoxic, pollution-free.
4, utilize existing equipment to get final product suitability for industrialized production, cost is low, and technique is simple, workable, good in economic efficiency.
The specific embodiment:
In actual production, by sorbierite be nucleator with help flow point powder evenly to mix with isotactic polypropylene after, through screw extruding melting, then carry out the special-shaped melt spinning of low temperature, strand through cooling, oil, the operation such as stretching obtains flash polypropylene fiber after processing.Instantiation is as follows.
Embodiment mono-:
By melt index, be that the section of 18g/10min isotactic polypropylene adds screw extruder, extrusion molten at 230～250 ℃, spinning moulding at 250 ℃, obtains flash polypropylene fiber semi-finished product; Spinning moulding has trilobal cross spinneret orifice with spinnerets, and plate hole leaf is wide is 0.1, and leaf length is 0.6.Semi-finished product fiber is stretched at 70～80 ℃ 4 times of left and right, obtain having certain flash effect and obtain trilobal cross polypropylene fibre.This fibre single thread line density is 3.3dtex, and fracture strength is 2.8cN/dtex, and elongation at break is in 30% left and right, and degree of profile is 59%.
Embodiment bis-:
By melt index, be 18g/10min isotactic polypropylene section be that nucleator U.S. vertical 3988 mixes by the mass ratio of 99.7/0.3 with sorbierite, add simultaneously help flow point powder polypropylene wax, polypropylene wax addition be U.S. stand 3988 weight 1/3.Three high-speed mixer and mixing 10 minutes, then adds screw extruder at 50～60 ℃, at the extrusion molten of 230～250 ℃, and spinning moulding at 240 ℃, 4 times of left and right stretch at 60～70 ℃.Spinning moulding has trilobal cross spinneret orifice with spinnerets, and plate hole leaf is wide is 0.1, and leaf length is 0.6.Fibre single thread line density is 3.3dtex, and fracture strength is 3.6cN/dtex, and extension at break is 30%, and degree of profile is 54%, and fiber flash effect is better than virgin pp three leaf fibres.
Embodiment tri-:
By melt index, be 18g/10min isotactic polypropylene section be that nucleator U.S. vertical 3988 mixes by the mass ratio of 99.4/0.6 with sorbierite, add simultaneously help flow point powder polypropylene wax, polypropylene wax addition be U.S. stand 3988 weight 1/3.Three high-speed mixer and mixing 10 minutes, then adds screw extruder at 50～60 ℃, at the extrusion molten of 230～250 ℃, and spinning moulding at 240 ℃, 4 times of left and right stretch at 60～70 ℃.Spinning moulding has trilobal cross spinneret orifice with spinnerets, and plate hole leaf is wide is 0.1, and leaf length is 0.6.Fibre single thread line density is 2.65dtex, and fracture strength is 3.8cN/dtex, and extension at break is 30%, and degree of profile is 60%, and fiber flash effect is better than virgin pp three leaf fibres.
Embodiment tetra-:
By melt index, be 35g/10min isotactic polypropylene section being nucleator U.S. vertical 3988 with sorbierite mixes by 98/2 mass ratio, add simultaneously help flow point powder polypropylene wax, polypropylene wax addition be U.S. stand 3988 weight 1/2.Three high-speed mixer and mixing 10 minutes, then adds screw extruder at 50～60 ℃, at the extrusion molten of 240～250 ℃, and spinning moulding at 250 ℃, 4 times of left and right stretch at 60～70 ℃.Spinning moulding has trilobal cross spinneret orifice with spinnerets, and wherein the leaf of two leaves is wide is 0.12, leaf length be the leaf of 0.48, one leaf wide be 0.12, leaf length is 0.72.Fibre single thread line density is 6.6dtex, and fracture strength is 3.5cN/dtex, and extension at break is 30%, and degree of profile is 45%, and fiber flash effect is better than virgin pp three leaf fibres.
Embodiment five:
By melt index, be 35g/10min isotactic polypropylene section being nucleator U.S. vertical 3988 with sorbierite mixes by 99/1 mass ratio, add simultaneously help flow point powder polypropylene wax, polypropylene wax addition be U.S. stand 3988 weight 1/2.Three high-speed mixer and mixing 10 minutes, then adds screw extruder at 50～60 ℃, at the extrusion molten of 240～250 ℃, and spinning moulding at 250 ℃, 4 times of left and right stretch at 60～70 ℃.Spinning moulding has trilobal cross spinneret orifice with spinnerets, and wherein the leaf of two leaves is wide is 0.1, leaf length be the leaf of 0.4, one leaf wide be 0.1, leaf length is 0.6.Fibre single thread line density is 4.4dtex, and fracture strength is 3.7cN/dtex, and extension at break is 30%, and fiber flash effect is better than virgin pp three leaf fibres.
Embodiment six:
By melt index, be 35g/10min isotactic polypropylene section being nucleator DBS with sorbierite mixes by 99/1 mass ratio, adds simultaneously and helps flow point powder polypropylene wax, and polypropylene wax addition is 1/2 of DBS weight.Three high-speed mixer and mixing 10 minutes, then adds screw extruder at 50～60 ℃, at the extrusion molten of 240～250 ℃, and spinning moulding at 250 ℃, 4 times of left and right stretch at 60～70 ℃.Spinning moulding has trilobal cross spinneret orifice with spinnerets, and wherein the leaf of two leaves is wide is 0.1, leaf length be the leaf of 0.6, one leaf wide be 0.1, leaf length is 0.6.Fibre single thread line density is 4.4dtex, and fracture strength is 3.3cN/dtex, and extension at break is 30%, and fiber flash effect is better than virgin pp three leaf fibres.
Embodiment seven:
By melt index, be 35g/10min isotactic polypropylene section being nucleator DBS with sorbierite mixes by 99/0.6 mass ratio, adds simultaneously and helps flow point powder polypropylene wax, and polypropylene wax addition is 1/2 of DBS weight.Three high-speed mixer and mixing 10 minutes, then adds screw extruder at 50～60 ℃, at the extrusion molten of 240～250 ℃, and spinning moulding at 250 ℃, 4 times of left and right stretch at 60～70 ℃.Spinning moulding has trilobal cross spinneret orifice with spinnerets, and wherein the leaf of two leaves is wide is 0.1, leaf length be the leaf of 0.4, one leaf wide be 0.1, leaf length is 0.6.Fibre single thread line density is 4.4dtex, and fracture strength is 3.3cN/dtex, and extension at break is 30%, and fiber flash effect is better than virgin pp three leaf fibres.
In sum, by the comparison with embodiment 2～7 to embodiment 1, can find out flash polypropylene fiber of the present invention, to add sorbierite be nucleator and help after flow point powder, change its crystalline texture, in conjunction with special-shaped spinning, obtain the polypropylene fibre with high flash characteristic and higher fracture strength.Compare with other flashing fibers, fiber of the present invention has the feature lightweight, intensity is high, and cost is low, and technique is simple, can meet the demand of flash polypropylene fiber on market, has good economic and social benefit.
Claims (5)
1. a flash polypropylene fiber, by isotactic polypropylene, nucleator, help flow point powder to make through the special-shaped spinning of melt, drawing process, it is characterized in that wherein the mass fraction of each component is respectively isotactic polypropylene 98%～99.7%, nucleator 0.3%～2%, help the amount of flow point powder to be nucleator 1/3～1/2, above three kinds of components and be 100%, the monofilament linear density of polypropylene fibre is that 2.65～6.6dtex, degree of profile are greater than 45%, have flash effect;
Wherein, the melt index of described isotactic polypropylene is 18～35g/10min, and nucleator is dibenzyl glucitol derivative class nucleator, and helping flow point powder is the polypropylene wax of molecular weight 4000～6000.
2. the preparation method of flash polypropylene fiber claimed in claim 1, it is characterized in that this fiber consists of following raw material and constituent ratio: polypropylene chip is that melt index is the isotactic polypropylene of 18～35g/10min, its mass fraction in fiber is 98%～99.7%, nucleator is dibenzyl glucitol derivative class nucleator, its mass fraction in fiber is 0.3%～2%, helping flow point powder is that molecular weight is 4000～6000 polypropylene wax, its addition is 1/3～1/2 of nucleator, above three kinds of components and be 100%;
Concrete preparation method is: by isotactic polypropylene, nucleator and help flow point powder in proportion in high-speed mixer and mixing, after screw extruding melting, melt equal and quantitative is extruded from the profiled holes of spinnerets, the strand of extruding is cooling in air, oil, by winder winding on bobbin, fiber after balance is stretched, dry, obtains flash polypropylene fiber.
3. flash polypropylene fiber preparation method according to claim 2, it is characterized in that described spinnerets is the circular jetting filament plate of diameter 30～45mm, on spinnerets, there are 10～24 spinneret orifices, each spinneret orifice is all with taper guide hole, shape of spinneret is trilobal cross, and three blades are arranged radially, and the angle between blade is 120 degree, wherein the length-width ratio of two blades is that the length-width ratio of 4～6: 1, one blade is 6: 1.
4. flash polypropylene fiber preparation method according to claim 2, it is characterized in that isotactic polypropylene, nucleator, helping the blending temperature of flow point powder in high mixer is 50～60 ℃.
5. flash polypropylene fiber preparation method according to claim 2, is characterized in that extrusion molten temperature is 230～250 ℃, and spinning temperature is 240～250 ℃, and draft temperature is 60～80 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110129625.4A CN102154724B (en) | 2011-05-18 | 2011-05-18 | Flash polypropylene fiber and preparation method thereof |
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| CN201110129625.4A CN102154724B (en) | 2011-05-18 | 2011-05-18 | Flash polypropylene fiber and preparation method thereof |
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| CN102154724A CN102154724A (en) | 2011-08-17 |
| CN102154724B true CN102154724B (en) | 2014-02-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152054A (en) * | 1996-09-28 | 1997-06-18 | 山东虎山实业集团有限公司 | Polypropylene fibre used for preventing cement from cracking |
| CN1206757A (en) * | 1997-07-28 | 1999-02-03 | 弗纳技术股份有限公司 | Isotactic polypropylene and syntiotactic polypropylent double-component fiber, making method and products thereof |
| CN101942146A (en) * | 2009-07-10 | 2011-01-12 | 中国石油化工股份有限公司 | Controllable rheological high-gloss polypropylene resin and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11152624A (en) * | 1997-11-19 | 1999-06-08 | Mitsubishi Rayon Co Ltd | Highly crimpable polypropylene-based conjugate long fiber and its production |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152054A (en) * | 1996-09-28 | 1997-06-18 | 山东虎山实业集团有限公司 | Polypropylene fibre used for preventing cement from cracking |
| CN1206757A (en) * | 1997-07-28 | 1999-02-03 | 弗纳技术股份有限公司 | Isotactic polypropylene and syntiotactic polypropylent double-component fiber, making method and products thereof |
| CN101942146A (en) * | 2009-07-10 | 2011-01-12 | 中国石油化工股份有限公司 | Controllable rheological high-gloss polypropylene resin and preparation method thereof |
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