CN106435802A - Acrylic fibers with peanut-shaped cross section and production method thereof - Google Patents
Acrylic fibers with peanut-shaped cross section and production method thereof Download PDFInfo
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- CN106435802A CN106435802A CN201610863568.5A CN201610863568A CN106435802A CN 106435802 A CN106435802 A CN 106435802A CN 201610863568 A CN201610863568 A CN 201610863568A CN 106435802 A CN106435802 A CN 106435802A
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- acrylic fiber
- spinneret
- section
- peanut
- shaped section
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/06—Washing or drying
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
Abstract
The invention discloses acrylic fibers with a peanut-shaped cross section. The acrylic fibers with the peanut-shaped cross section are mainly prepared from the following components in percentage by mass: 91 percent to 94 percent of acrylonitrile and 6 percent to 9 percent of vinyl acetate. The acrylic fibers with the peanut-shaped cross section are obtained by extruding through a spinneret plate and the length-width ratio of the section is (3 to 5) to 2. The invention further discloses a production method of the acrylic fibers with the peanut-shaped cross section; the production method comprises the following steps: carrying out a copolymerization reaction on the acrylonitrile and the vinyl acetate and then forming a raw spinning solution in a solvent; heating the raw spinning solution to 82 DEG C to 90 DEG C and extruding from the spinneret plate; forming as-spun fibers in a condensation bath; carrying out water washing and drafting on the as-spun fibers to form a fiber bundle; and carrying out oil application, drying and sizing on the fiber bundle to obtain the acrylic fibers with the peanut-shaped cross section. According to the acrylic fibers with the peanut-shaped cross section, the content of the acrylonitrile and the vinyl acetate in a copolymer and the molecular weight of the copolymer are adjusted, the spinneret plate is reasonably designed and a production process is adjusted, so that the prepared acrylic fibers have excellent performances.
Description
Technical field
The present invention relates to a kind of acrylic fiber is and in particular to a kind of peanut shaped section acrylic fiber and its production method.
Background technology
Acrylic fiber (polyacrylonitrile fibre) has the title of artificial wool, has soft, bulk, easy dye, lovely luster, resistance to
Light, antibacterial, it is not afraid of the advantages of damage by worms.Elasticity is good, and during elongation 20%, rebound degree still can keep 65%, fluffy curling and soft, guarantor
Warm property is higher by 15% than Pilus Caprae seu Oviss, and intensity is 1.8-4.5cN/dtex, higher 1-2.5 times than Pilus Caprae seu Oviss.Sun-proof function admirable, open-air exposure one
Year, intensity only declines 20%.Fiber softening temperature 190-230 DEG C, the acidproof, antioxidant of energy and common organic solvents, but alkaline-resisting
Property is poor.Require pure to spin according to different purposes or with natural fibre blended, its textile is widely used in clothing, decoration
In field.
Used in existing acrylic fiber manufacture process, spinneret mostly is the structure of circular spinneret orifice, the nitrile produced
Synthetic fibre fibre section is circular solids structure, arrangement closely, intermolecular lack hydrophilic-structure, therefore regain very little, hygroscopicity, easily
Metachromia is poor, and light is irradiated to during surface and easily forms diffuse-reflectance, and therefore gloss is poor；Concurrently there are that feel is poor, snug fit
Property poor etc. not enough it is difficult to meet the needs of people.In addition, produce at present acrylic fiber adopt dry spinning, wet spinning or
The mode of dry-wet spinning, the air gap is little, and the time being available for the adjustment of high-polymer molecular chain movement is short, along between orifice
Away from little, easily cause haircuts, thus the fibre bundle of spinning is it is difficult to ensure that homogeneity, due to process conditions and status of equipment
Etc. problems so that long period efficient stable spinning has difficulties.
Content of the invention
The purpose of the present invention be for prior art exist the problems referred to above it is proposed that a kind of peanut shaped section acrylon are fine
Dimension, the product warmth retention property being obtained using this peanut shaped section acrylic fiber is good, dry and comfortable ventilative, fluffy sense is stood upright and felt.
The purpose of the present invention can be realized by following technical proposal：A kind of peanut shaped section acrylic fiber, this peanut shaped
Section acrylic fiber mainly includes the composition of following mass percent：Acrylonitrile 91-94%, vinyl acetate 6-9%, described flower
Raw type section acrylic fiber is (3-5) by obtaining length-width ratio from spinneret extrusion molding：2 section.
Polyacrylonitrile macromole without second comonomer tends to closely pile up, and in order, this structure makes fibre to transverse height
Dimension lacks elasticity, quality embrittlement, can not carry out super drawing during fiberizing.In this regard, the present invention adds the vinyl acetate of 6-9%
With the acrylonitrile compolymer of 91-94%, destroy the regularity of polyacrylonitrile macromolecular chain so as to structure occurs a certain degree of nothing
Sequence.The addition of vinyl acetate simultaneously reduces the dipole effect between cyano group, reduces the degree of crystallinity of polyacrylonitrile copolymer, makes to gather
The flexible reinforced of acrylonitrile macromole, polymeric vitrification point reduces, and flexibility and thermoelasticity strengthen.
The section of the peanut shaped section acrylic fiber of the present invention is peanut-shaped, deposits between the fiber in acrylic fiber aggregation
In air, Air permenbility is significantly lower than common acrylon, and the heat conductivity of still air is minimum, thus forms a good guarantor
Warm layer, improves bulkiness, spreadability and the warmth retention property of fiber.Under the conditions of identical coverage rate and heat insulation effect, can use less
Fiber, alleviates the weight of fabric, meets modern's requirement light and warm to clothing.Between the peanut shaped section acrylic fiber of the present invention
Also there is larger capillary zone, there is good capillary effect and superior moisture wicking ability, therefore regain will height
In common acrylon, product is made to have moisture absorbing and sweat releasing and warming effect concurrently.The length-width ratio in the section of peanut shaped section acrylic fiber refers to
The ratio of the width of the length of strong point in its section and the widest part, this ratio is (3-5)：When 2, peanut shaped section acrylic fiber
Fiber aggregate in interfibrous space maximum, more air can be preserved, in addition between fiber, cohesive force is also larger, use
The thermal property of the product that this acrylic fiber is obtained is good, spreadability is good, fluffy plentiful, water transport property is strong, dry and comfortable ventilative, dress is relaxed
Suitable.
Preferably, described spinneret includes plate body, plate body is provided with spinneret orifice, spinneret orifice includes introduction segment and molding
Section, the cross section of profiled section is (3-5) for length-width ratio：2 peanut shaped.
Described spinneret is discoid or rectangle, a diameter of 95-106mm of discoid spinneret, on spinneret uniform by
8-12 cloth porose area, total 10000-40000 special-shaped spinneret orifice.There is the spinneret size of above-mentioned quantity spinneret orifice suitably,
It is easy to production and application.
The design that the present invention passes through spinneret is obtained the peanut shaped acrylic fiber with special cross-section, with the life of this acrylic fiber
Than the product that common acrylic fiber produces, fluffy sense stands upright sense well much to the product producing, and thermal property is good, spreadability is good,
Water transport property is strong, dry and comfortable ventilative.
The spinneret of the present invention is divided into multiple regions, and each region is supplied separately to spinning solution, is conducive to coagulating bath equal
Even entrance spinneret inside and fiberizing, inside and outside uniformity, the homogeneity of fiber is preferable.
The spinneret orifice of the present invention is designed as the little inverted cone through hole of import large outlet, is conducive to spinning solution to enter spray webbing
Hole, and be extruded into closely thread acrylic fiber in the presence of pressure in spinneret orifice, prepared acrylic fiber surface and interior
The all few micropore in portion, smooth surface, glossiness is good.
Preferably, the medial wall of described spinneret orifice is 20-30 ° with the angle of central axis.This angle is excessive, and spinning is former
Liquid increases, is unfavorable for quickly extruding, this angle is too small, spinning solution is in spray webbing in the hole stream in spray webbing in the hole flows decrease, pressure
Speed is too fast, and the acrylic fiber monofilament surface of formation and inside easily form micropore, and structure is not compacted, the sense of impact final products
Official's performance and serviceability.
Preferably, the introduction segment of described spinneret orifice connects profiled section, the porch of introduction segment is the entrance of spinneret orifice
End, the exit of profiled section is the port of export of spinneret orifice.
Preferably, the length ratio of the introduction segment of described spinneret orifice and profiled section is (3-5)：2.Introduction segment and profiled section
Length spinning solution in the range of aforementioned proportion is suitable in spray webbing in the hole flow velocity and pressure, comparatively fast can be extruded into spinning solution
Type, the acrylic fiber monofilament structure being formed compacts, smooth surface.
Preferably, being longitudinally provided with groove on the medial wall of described profiled section.Longitudinally disposed on the medial wall of profiled section
Groove, makes prepared acrylic fiber surface also have longitudinal groove, increased the mechanical lock knot between fiber, gathers fibre compact
Gather together, increase the cohesive force between acrylic fiber, fiber is difficult to slip, and makes acrylic fiber product more durable.
Further object is that providing a kind of production method of above-mentioned peanut shaped section acrylic fiber, this production
Method comprises the steps：Form spinning solution in a solvent after acrylonitrile, copolymerization of vinyl acetate；Spinning solution is heated
Extrude from spinneret to 82-90 DEG C, coagulating bath forms as-spun fibre；As-spun fibre forms fiber through washing, drawing-off
Tow, fibre bundle passes through and oils, dries, shaping, prepared peanut shaped section acrylic fiber.
, by the adjustment of the design of spinneret, spinning technique, prepared special cross-section peanut shaped acrylic fiber, with this for the present invention
Fluffy sense sense of standing upright is good a lot of than the product that common acrylic fiber produces for the product that fiber produces, and thermal property good,
Soft very refreshing, spreadability is good, water transport property is strong, dry and comfortable ventilative, gloss is soft.
Preferably, the preparation process of described spinning solution is：By the acrylonitrile for 91-94% for the mass percent and 6-
9% copolymerization of vinyl acetate is obtained polyacrylonitrile dry powder, and polyacrylonitrile dry powder is dissolved in dimethylacetamide solvent
Form the spinning solution that mass percent concentration is 23-26%.
In spinning solution, polyacrylonitrile content is high, and the solvent that need to remove is few, easy molding, and fibre density increases, and easily protects
Hold shape.If polymer content is too low in spinning solution, contact probability between macromole can be reduced it is impossible to coagulation forming it is difficult to
Form acrylic fiber.
Preferably, the molecular weight of described polyacrylonitrile dry powder is 60000-100000.
Described spinning solution is extruded after being heated to 82-90 DEG C from spinneret.
Spinning solution temperature affects its viscoelastic property, and temperature suitably raises viscosity and the bullet that can reduce spinning solution
Property, reduce spinneret orifice extrusion swelling, improve the special-shaped degree of peanut shaped acrylon.But spinning solution temperature is too high and can cause peanut shaped
It is excessively fierce that acrylic fiber shapes, and dynamic analysis of spinning produces core-skin Rotating fields, and the physical property of impact acrylic fiber, in said temperature
Under, dope viscosity is suitably it is easier to extrude from spinneret, and can form preferable spinning.
Preferably, the temperature that described spinning solution enters during coagulating bath is 80-90 DEG C, coagulation bath temperature is 30-45 DEG C,
In coagulating bath, the concentration of solvent dimethyl acetylamide is 45-55%, and circulating load is 30-34kL/h.
When solidification bath concentration is too high, double diffusion process is excessively slow, causes coagulation forming difficult, molding is insufficient, and fracture of wire increases,
Fiber surface solidification is bad, is formed and silk, and fabric hand is thick and stiff, intensity decreases.But when solidifying bath concentration and being too low, spinning solution
With coagulating bath excessive temperature differentials, double diffusion process is accelerated, and makes the solidification of fiber sheath excessively fierce, in spinning solution thread outer layer shape
Become brittle cortex, the tensility of fiber declines, and causes fiber to produce cavity, easy fracture and produce lousiness, wiriness, color
Pool whiting, slight and degree of stretching all declines.
Preferably, the detailed process of described washing, drawing-off is：Carried out using drafting machine after above-mentioned as-spun fibre is washed
Drawing-off forms fibre bundle, and washing temperature is 86-92 DEG C, and washing flow is 2800-3200L/h, and drafting multiple is 3-6 times.
In the present invention, after washing drawing-off, the morphosiss of fiber and supramolecular structure there occurs change to as-spun fibre, with
The increase of drafting multiple, macromolecular orientation degree increases, fibrous fracture intensity improves, ductility declines.If drafting multiple is too low,
The fracture strength of fiber especially line density cannot be guaranteed, and is unable to undergo super drawing and produces single wire fracture it is impossible to obtain relatively
Good shrinkage factor.When drafting multiple is 3-6 times, the elongation at break of fiber and fracture strength will greatly improve.Work as washing temperature
Too low, easily there is brittle fracture in drafting process；Washing temperature is too high, and fiber plastic deformation is notable, and this partial deformation is being dried
Shi Buneng recovers, thus subtracting low-fiber elongation at break, drops low-fiber shrinkage factor.Therefore, the present invention will wash drawing-off
Temperature control is at 86-92 DEG C.
Preferably, the described detailed process that oils, dry, shaping is：Fibre bundle after washing, drawing-off is oiled
Agent, the fibre bundle after oiling is dried by hot-rolling at 130-150 DEG C, the fibre bundle cooling curling after drying, so
Send into afterwards in sizing pot, carry out thermal finalization process under 100-130 DEG C, 150-250KPa.
If temperature is too high when hot-rolling is dried, macromole can be made to obtain energy within a certain period of time and excessive shrinkage, this part
Contraction can not recover, and fibrous elasticity can be led to decline.If drying temperature is too low and regain can be improved, bring to rear spinning processing tired
Difficulty, the therefore present invention control drying temperature at 130-150 DEG C.
Higher heat treatment pressure is present invention employs compared with common acrylic fiber.Acrylic fiber is in heat-setting process
There is order and change in orientation.Between acrylonitrile copolymer macromole, main active force is the dipole force between cyano group, in glass
It is more than glass temperature that lax nursing can alleviate some unstable idols that the orientation stress of the high-elastic stretching of structure endogenous cause of ill causes
Pole molecular force, makes fiber internal stress disappear, macromole is relatively freely crispaturaed, the orientation after segment richer flexibility thermal finalization
Degree decreases.Reach identical ductility, the tensile stress that the high fiber of heat setting temperature needs is just little, and tensile stress
Little, then show that segment easily produces motion, therefore properly increase steam pressure and the setting temperature of thermal finalization, be conducive to produce with
Elongation based on high elastic deformation, can make macromole fully shrink, thus improving the contractility of acrylic fiber.
Preferably, described oil preparation is the compound of nonionic and cationic surfactant, also wrap in described oil preparation
Include the cationic surfactant preventing boning, the described inactivity of YANG QI ionic surface active agent preventing from boning is quaternaries cation
Surfactant.
The fiber that common oil preparation is processed is just very easily hardened, hardens, shrinkage factor is not high, and the present invention passes through to increase quaternary ammonium
Salt cationic surfactant, makes acrylic fiber fluffy smooth, shrinkage factor is good.
Compared with prior art, the invention has the advantages that：The present invention pass through adjust copolymer in acrylonitrile and
Low-fiber vitrification point, the flexibility of reinforcing fiber and thermoelastic, drop in the content of vinyl acetate and the molecular weight of copolymer
Property；By adjusting concentration, the temperature of spinning solution, the concentration of solidification liquid, temperature, circulating load, Reasonable adjustment washing temperature, drawing-off
Multiple, and control the technological parameters such as drying, the temperature of sizing, pressure, and the draw ratio of high convergency, make the contraction of acrylic fiber
Property high, soft, rigidity is strong, and resilience, bulkiness, spreadability, hydrophobicity, spinnability are good；By reasonable to spinneret
Design, makes the technological process of production smooth, makes that prepared acrylic fiber thermal property is good, soft very refreshing, spreadability is good, fluffy
Pine is plentiful, water transport property is strong, dry and comfortable ventilative, comfortable and easy to wear, gloss is soft.
Brief description
Fig. 1 is an example structure schematic diagram of spinneret in the present invention.
Fig. 2 is the sectional view of the spinneret orifice of spinneret in the present invention.
Fig. 3 is the cross-sectional view of the profiled section of spinneret orifice in the present invention.
In figure, 1 is spinneret, and 2 is spinneret orifice.
Specific embodiment
The following is the specific embodiment of the present invention and combine accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
Described spinneret 1 is discoid or rectangle, a diameter of 95-106mm of discoid spinneret, uniform on spinneret
By 8-12 cloth porose area, described spinneret 1 includes plate body, plate body is provided with spinneret orifice 2, and spinneret orifice is designed as import large outlet
Little inverted cone through hole, is conducive to spinning solution to enter spinneret orifice, the medial wall of spinneret orifice and the angle of central axis are 20-
30 ° it is easy to be extruded into closely thread acrylic fiber.Below by specific embodiment to solving further in the present invention
Release.
Embodiment 1
The method producing peanut shaped section acrylic fiber comprises the steps：
S1：Spinning moulding：By mass percent be 91% acrylonitrile and vinyl acetate copolymerization that mass percent is 9%
Reaction is obtained the polyacrylonitrile dry powder that molecular weight is 60000-80000, polyacrylonitrile dry powder is dissolved in dimethyl acetylamide molten
Form the spinning solution that mass percent concentration is 23%, spinning solution squeezes after being heated to 82 DEG C from the hole of spinneret in agent
Go out, in coagulating bath, form as-spun fibre through double diffusion；
Wherein, the temperature that spinning solution enters during coagulating bath is 80 DEG C, and coagulation bath temperature is 30 DEG C, dimethyl in coagulating bath
The concentration of acetyl amine solvent is 45%, and circulating load is 30kL/h；
Spinneret is rectangular slab or circular slab, is made using materials such as alloy, rustless steels, and the quantity of spinneret orifice is 30000-
40000, spinneret is divided into multiple regions, and spaced by atresia between region, each region is supplied separately to spinning solution；
S2, washing, drawing-off：Carry out drawing-off using drafting machine after above-mentioned as-spun fibre is washed and form fibre bundle, washing
Temperature is 86 DEG C, and washing flow is 2800L/h, and drafting multiple is 3 times.
S3, oil：By the fibre bundle oil agent after washing, drawing-off；Oil preparation is nonionic and cationic surfactant
Compound, also include preventing the quaternary cationic surfactant boning in oil preparation, oil preparation addition is fibre bundle
The 0.3% of total amount.
S4, drying, sizing：Fibre bundle after oiling is dried by hot-rolling at 130 DEG C, by the cellosilk after drying
Bundle cooling curling, is then fed into shaping in pot, carries out thermal finalization process, prepared peanut shaped section acrylon under 100 DEG C, 150KPa
Fiber.
Embodiment 2
The method producing peanut shaped section acrylic fiber comprises the steps：
S1：Spinning moulding：By mass percent be 92% acrylonitrile and vinyl acetate copolymerization that mass percent is 8%
Reaction is obtained the polyacrylonitrile dry powder that molecular weight is 70000-90000, polyacrylonitrile dry powder is dissolved in dimethyl acetylamide molten
Form the spinning solution that mass percent concentration is 24%, spinning solution squeezes after being heated to 84 DEG C from the hole of spinneret in agent
Go out, in coagulating bath, form as-spun fibre through double diffusion；
Wherein, the temperature that spinning solution enters during coagulating bath is 86 DEG C, and coagulation bath temperature is 32 DEG C, dimethyl in coagulating bath
The concentration of acetyl amine solvent is 48%, and circulating load is 31kL/h；
Spinneret is rectangular slab or circular slab, is made using materials such as alloy, rustless steels, and the quantity of spinneret orifice is 20000-
30000, the cross section of profiled section is 4 for length-width ratio：2 Semen arachidis hypogaeae shape.
S2, washing, drawing-off：Carry out drawing-off using drafting machine after above-mentioned as-spun fibre is washed and form fibre bundle, washing
Temperature is 88 DEG C, and washing flow is 2900L/h, and drafting multiple is 4 times.
S3, oil：By the fibre bundle oil agent after washing, drawing-off；Oil preparation is nonionic and cationic surfactant
Compound, also include preventing the quaternary cationic surfactant boning in oil preparation, oil preparation addition is fibre bundle
The 0.35% of total amount.
S4, drying, sizing：Fibre bundle after oiling is dried by hot-rolling at 140 DEG C, by the cellosilk after drying
Bundle cooling curling, is then fed into shaping in pot, carries out thermal finalization process, prepared peanut shaped section acrylon under 110 DEG C, 180KPa
Fiber.
Embodiment 3
The method producing peanut shaped section acrylic fiber comprises the steps：
S1：Spinning moulding：By mass percent be 94% acrylonitrile and vinyl acetate copolymerization that mass percent is 7%
Reaction is obtained the polyacrylonitrile dry powder that molecular weight is 80000-100000, polyacrylonitrile dry powder is dissolved in dimethyl acetylamide molten
Form the spinning solution that mass percent concentration is 25%, spinning solution squeezes after being heated to 86 DEG C from the hole of spinneret in agent
Go out, in coagulating bath, form as-spun fibre through double diffusion；
Wherein, the temperature that spinning solution enters during coagulating bath is 90 DEG C, and coagulation bath temperature is 36 DEG C, dimethyl in coagulating bath
The concentration of acetyl amine solvent is 50%, and circulating load is 33kL/h；
Spinneret is rectangular slab or circular slab, is made using materials such as alloy, rustless steels, and the quantity of spinneret orifice is 30000-
40000, spinneret is divided into multiple regions, spaced by atresia between region, and the cross section of spinneret orifice profiled section is length-width ratio
For 5：2 Semen arachidis hypogaeae shape.
S2, washing, drawing-off：Carry out drawing-off using drafting machine after above-mentioned as-spun fibre is washed and form fibre bundle, washing
Temperature is 90 DEG C, and washing flow is 3000L/h, and drafting multiple is 5 times.
S3, oil：By the fibre bundle oil agent after washing, drawing-off；Oil preparation is nonionic and cationic surfactant
Compound, also include preventing the quaternary cationic surfactant boning in oil preparation, oil preparation addition is fibre bundle
The 0.4% of total amount.
S4, drying, sizing：Fibre bundle after oiling is dried by hot-rolling at 140 DEG C, by the cellosilk after drying
Bundle cooling curling, is then fed into shaping in pot, carries out thermal finalization process, prepared peanut shaped section acrylon under 130 DEG C, 200KPa
Fiber.
Comparative example 1
The spinneret being used is common circular hole spinneret, and remaining is all same as Example 1.
The performance of the acrylic fiber being obtained in embodiment of the present invention 1-3 is compared with the acrylic fiber in comparative example 1,
Comparative result is as shown in table 1.
Table 1：Acrylic fiber in embodiment 1-3 and the comparison of the acrylic fiber in comparative example 1
Feel is scored and is divided the score averages of each group after scoring for 10 people groups after test by 1-5, and 5 are divided into full marks.
As known from Table 1, the shrinkage factor of the peanut shaped section acrylic fiber of the present invention is high, soft, and rigidity is strong, resilience
Property, bulkiness are good, and more soft than common acrylic fiber, fine and smooth, feel is more preferably.
Specific embodiment described herein is only explanation for example to present invention spirit.The affiliated technology of the present invention is led
The technical staff in domain can be made various modifications or supplement or replaced using similar mode to described specific embodiment
Generation, but the spirit without departing from the present invention or surmount scope defined in appended claims.
Claims (8)
1. a kind of peanut shaped section acrylic fiber is it is characterised in that this peanut shaped section acrylic fiber mainly includes following quality
The composition of percentage ratio：Acrylonitrile 91-94%, vinyl acetate 6-9%, described peanut shaped section acrylic fiber passes through from spinneret
It is (3-5) that extrusion molding obtains length-width ratio：2 section.
2. peanut shaped section acrylic fiber according to claim 1 is it is characterised in that described spinneret includes plate body, plate
Spinneret orifice is provided with body, spinneret orifice includes introduction segment and profiled section, the cross section of profiled section is (3-5) for length-width ratio：2 flower
Raw type.
3. peanut shaped section acrylic fiber according to claim 2 is it is characterised in that described spinneret is discoid or square
Shape, a diameter of 95-106mm of discoid spinneret, on spinneret uniform by 8-12 cloth porose area, total 10000-40000 is individual
Special-shaped spinneret orifice.
4. a kind of production method of described peanut shaped section acrylic fiber as arbitrary in claim 1-3 is it is characterised in that this life
Product method comprises the steps：Form spinning solution in a solvent after acrylonitrile, copolymerization of vinyl acetate；By spinning solution plus
Heat is extruded from spinneret to 82-90 DEG C, forms as-spun fibre in coagulating bath；As-spun fibre forms fibre through washing, drawing-off
Dimension tow, fibre bundle passes through and oils, dries, shaping, prepared peanut shaped section acrylic fiber.
5. the production method of peanut shaped section according to claim 4 acrylic fiber is it is characterised in that the system of spinning solution
For process it is：By the acrylonitrile for 91-94% for the mass percent, the copolymerization of vinyl acetate of 6-9% is obtained polyacrylonitrile and does
Powder, polyacrylonitrile dry powder is dissolved in the spinning that formation mass percent concentration in dimethylacetamide solvent is 23-26% former
Liquid.
6. the production method of peanut shaped section according to claim 4 acrylic fiber is it is characterised in that described spinning solution
Enter temperature during coagulating bath and be 80-90 DEG C, coagulation bath temperature is 30-45 DEG C, in coagulating bath, the concentration of solvent is 45-55%,
Circulating load is 30-34kL/h.
7. the production method of peanut shaped section according to claim 4 acrylic fiber is it is characterised in that washing, drawing-off
Detailed process is：Carry out drawing-off using drafting machine after as-spun fibre is washed and form fibre bundle, washing temperature is 86-92 DEG C,
Washing flow is 2800-3200L/h, and drafting multiple is 3-6 times.
8. the production method of peanut shaped section according to claim 4 acrylic fiber is it is characterised in that oiling, dry, determining
The detailed process of type is：By the fibre bundle oil agent after washing, drawing-off, by the fibre bundle after oiling at 130-150 DEG C
Dried by hot-rolling, the fibre bundle cooling curling after drying, be then fed into shaping in pot, in 100-130 DEG C, 150-
Carry out thermal finalization process under 250KPa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938904A (en) * | 2019-11-20 | 2020-03-31 | 浙江佳人新材料有限公司 | Production method of regenerated crimped yarn |
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