CN109423724A - Cellulose diacetate fibers item and preparation method thereof - Google Patents
Cellulose diacetate fibers item and preparation method thereof Download PDFInfo
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- CN109423724A CN109423724A CN201710764261.4A CN201710764261A CN109423724A CN 109423724 A CN109423724 A CN 109423724A CN 201710764261 A CN201710764261 A CN 201710764261A CN 109423724 A CN109423724 A CN 109423724A
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- Prior art keywords
- cellulose diacetate
- item
- diacetate fibers
- length
- crush cutting
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Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/74—Rollers or roller bearings
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
Abstract
The present invention provides cellulose diacetate fibers item and preparation method thereof, cellulose diacetate fibers item includes cotton, medium-length and wool type.These three cellulose diacetate fibers items are mainly distinguished by average bulk length and line density.The average bulk length of cotton cellulose diacetate fibers item is 25-45mm, line density 0.8-3.0dtex；The average bulk length of medium-length cellulose diacetate fibers item is 51-69mm, line density 2.0-4.0dtex；The average bulk length of wool type cellulose diacetate fibers item is 70-150mm, line density 2.0-8.5dtex.Cellulose diacetate fibers item can be carried out with wool, chemical fibre or cotton etc. it is blended, to extend the application range of Celluloseacetate cigarette filter tow.
Description
Technical field
The invention belongs to textile fiber technology fields, are related to cellulose diacetate fibers item and preparation method thereof.
Background technique
Cellulose diacetate fibers are as one of the regenerated celulose fibre used earliest, due to excellent selectivity
Absorption property is filtered, therefore is widely used in terms of cigarette filter-tip material.In addition, cellulose diacetate fibers have
Good gloss and feel have been applied to the fabrics such as high-grade clothing, lining in foreign countries.Due to its weaving, dyeing and finishing processing technology
It is required that it is high, not yet occur the research and development of weaving cellulose diacetate fibers both at home and abroad at present.
Intensity difference, the elongation of cellulose diacetate fibers are big, and one pack system difficulty of processing is larger in terms of weaving is taken, and adopt
This can be effectively solved the problems, such as with the mode with other fiber blends.But due to the dyeing process of cellulose diacetate fibers with
The textile materials such as wool, cotton, chemical fibre are different, are suitable for the textile materials drawing spinning such as wool, cotton, chemical fibre therefore it is necessary to invent
The cellulose diacetate fibers item of yarn can just have its actual clothes value.
Inventor has found under study for action, and the item processed of cellulose diacetate fibers is carried out using conventional break machine, can be made
Cellulose diacetate fibers are impaired serious, and strength and elongation at break all reduce, and reduce curling, while distribution of lengths is not achieved
The requirement of Poisson distribution, and cohesive force between fiber is reduced, the drafting of road and other fibers produces after being not suitable for.
In addition, conventional break machine is easy to produce overlength fiber in stretch breaking process, after super long stapled presence will give
Procedure makes troubles, and such as winds roller, roller, causes to break end；If into yarn body, it will influence sliver quality.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide can be mixed with wool, chemical fibre or cotton etc.
The cellulose diacetate fibers item of spinning.
It is another object of the present invention to provide a kind of preparation methods of cellulose diacetate fibers item that can be blended.
In order to achieve the above objectives, solution of the invention is:
<cotton cellulose diacetate fibers item>
A kind of cotton cellulose diacetate fibers item, average bulk length are 25-45mm, line density 0.8-
3.0dtex.Wherein, the mean intensity of cellulose diacetate fibers can be 9-15cN/tex, and average elongation at break can be
9-25%, item weight irregularity can be 0.5-3.0%, cotton knot≤0.5/gram, item again can be 3-30g/m, official regain
It is 6.5%.
The preparation method of above-mentioned cotton cellulose diacetate fibers item includes the following steps:
The cellulose diacetate fibers tow of 20000-50000dtex is added to the antistatic agent of 0.5-1wt%, is controlled back
Damp rate directly successively carries out preliminary draft, secondary drawing-off, dominant draft, secondary crush cutting and main crush cutting in 6-13%, without standing, and obtains cotton
Type cellulose diacetate fibers item.
Wherein, the amount of pressurization of preliminary draft can be 0.2-0.3MP, and drafting multiple can be 1.01-1.1 times.Secondary drawing-off
Amount of pressurization can be 0.2-0.3MP, and drafting multiple can be 1.1-1.3 times.The amount of pressurization of dominant draft can be 0.2-0.3MP,
Drafting multiple can be 1.1-1.3 times.The amount of pressurization of secondary crush cutting can be 0.4-0.5MP, and drafting multiple can be 1.6-2 times.
The amount of pressurization of main crush cutting can be 0.4-0.5MP, and drafting multiple can be 1.8-3.5 times.
<medium-length cellulose diacetate fibers item>
A kind of medium-length cellulose diacetate fibers item, average bulk length are 51-69mm, line density 2.0-
4.0dtex.Wherein, the mean intensity of cellulose diacetate fibers can be 9-15cN/tex, and average elongation at break can be
9-25%.
Wherein, medium-length cellulose diacetate fibers item item weight irregularity can be 0.5-3.0%, cotton knot≤0.5/
Gram, item can be 5-40g/m, official regain 6.5% again.
The preparation method of above-mentioned medium-length cellulose diacetate fibers item includes the following steps:
The cellulose diacetate fibers tow of 20000-50000dtex is added to the antistatic agent of 0.5-1wt%, is controlled back
Damp rate directly successively carries out drawing-off, secondary crush cutting and main crush cutting in 5-10%, without standing 24 hours, obtains two acetic acid of medium-length
Cellulose fibre item.
Wherein, the amount of pressurization of drawing-off can be 0.2-0.3MP, and drafting multiple can be 1.1-1.4 times.The pressurization of secondary crush cutting
Amount can be 0.4-0.5MP, and drafting multiple can be 1.6-2 times.The amount of pressurization of main crush cutting can be 0.4-0.5MP, drawing-off times
Number can be 1.8-3.2 times.
<wool type cellulose diacetate fibers item>
A kind of wool type cellulose diacetate fibers item, average bulk length can be 70-150mm, and line density can be
2.0-8.5dtex.Wherein, the mean intensity of cellulose diacetate fibers can be 9-15cN/tex, and average elongation at break can
Think 9-25%, line density can be 2.0-8.5dtex, and item weight irregularity can be 0.5-3.0%, card nailing neps≤0.5/gram,
Item can be 5-40g/m, official regain 6.5% again.
The preparation method of above-mentioned wool type cellulose diacetate fibers item includes the following steps:
The cellulose diacetate fibers tow of 20000-50000dtex is added to the antistatic agent of 0.5-1wt%, is controlled back
Damp rate directly successively carries out drawing-off, secondary crush cutting and main crush cutting in 5-9%, without standing 24 hours, and it is fine to obtain two acetic acid of wool type
Cellulose fiber item.
Wherein, the amount of pressurization of drawing-off can be 0.2-0.3MP, and drafting multiple can be 1.1-1.5 times.The pressurization of secondary crush cutting
Amount can be 0.4-0.5MP, and drafting multiple can be 1.6-2 times.The amount of pressurization of main crush cutting can be 0.4-0.5MP, drawing-off times
Number can be 1.8-3.5 times.
By adopting the above scheme, the beneficial effects of the present invention are:
The first, the present invention using cellulose diacetate fibers tow by the adjustment of technological parameter produce three kinds it is different
Cellulose diacetate fibers item can be used in different products, to extend application range after blended.
The second, the present invention eliminates overlength fiber using Chinese character pin-shaped roller (roller, also known as roller), is reduced to its content
Zero.Compared with common pair roller type roller, Chinese character pin-shaped roller increases the contact length of fiber and roller, i.e. winding angle increases
Add, the friction of roller and fiber increases, then roller increases the curable grip of fiber.When super long stapled length is more than two groups of product words
When gauge between type roller, under enough curable grips, when the two groups of Chinese character pin-shaped roller revolving speed differences in front and back, overlength fiber is then
Can be pulled off becomes the length for meeting technique, eliminates super long stapled purpose to reach.
Third, the present invention use multi-region drawing-off principle, and at the same time using isosceles triangle roller, can increase curable grip,
To reduce the generation of card nailing neps or cotton knot.
Detailed description of the invention
Fig. 1 is the I tee section schematic diagram of cotton cellulose diacetate fibers item of the invention；
Fig. 2 is the X-shaped schematic cross-section of cotton cellulose diacetate fibers item of the invention；
Fig. 3 is the y-shaped cross-section schematic diagram of cotton cellulose diacetate fibers item of the invention；
Fig. 4 is the R tee section schematic diagram of cotton cellulose diacetate fibers item of the invention；
Fig. 5 is the schematic diagram of the drawing-off pressing mechanism for cotton cellulose diacetate fibers item of the invention；
Fig. 6 is the schematic diagram of an output device of the invention；
Fig. 7 is the schematic diagram of the drawing-off pressing mechanism for medium-length cellulose diacetate fibers item of the invention；And
Fig. 8 is the schematic diagram of the drawing-off pressing mechanism for wool type cellulose diacetate fibers item of the invention.
Appended drawing reference:
First bearing seat 1, second bearing seat 2,3rd bearing seat 3, fourth bearing seat 4,5th bearing seat 5, main crush cutting area 6
Secondary crush cutting area 7, main drawing area 8, secondary draft area 9, drawing-off pressing mechanism 10, Xelminator 11, Xelminator 12, stepped tooth
Press formula pressure roller 13, horn mouth 14, can coiler 15, pressure roller group 16, circle bar cylinder 17, output device 18, first bearing seat 21, second
Bearing block 22,3rd bearing seat 23, fourth bearing seat 24, main crush cutting area 26, secondary crush cutting area 27, draft area 28, drawing-off pressuring machine
Structure 20, Xelminator 31, Xelminator 32, first bearing seat 41, second bearing seat 42,3rd bearing seat 43, the 4th axis
Hold seat 44, main crush cutting area 46, secondary crush cutting area 47, draft area 48, drawing-off pressing mechanism 40, Xelminator 51, Xelminator
52, horizontal feeding direction A, outbound course B.
Specific embodiment
The present invention provides three kinds of different cellulose diacetate fibers items and preparation method thereof.Wherein, two acetic acid is fine
Cellulose fiber item includes cotton cellulose diacetate fibers item, medium-length cellulose diacetate fibers item and wool type diacetate fiber
Cellulose fiber item.These three cellulose diacetate fibers items are mainly distinguished according to average bulk length and line density.
<cotton cellulose diacetate fibers item>
[property of cotton cellulose diacetate fibers item]
The various physicochemical properties of cotton cellulose diacetate fibers item are as follows:
(1), the item weight (weight that length is the ribbon of 1m) of cotton cellulose diacetate fibers item is 53-30g/m, item
The weight coefficient of variation≤5.5, the testing standard used is FZ/T 50022-2014.
(2), the item weight irregularity of cotton cellulose diacetate fibers item is 0.5-3.0%.Control strip weight irregularity can be with
Control yarn yarn unevenness, thus control after road final products quality.
(3), the average bulk length (Hauteur) of cotton cellulose diacetate fibers item can be 25-45mm, can also
Think 30-40mm, discrete length coefficient >=25, the testing standard used is FZ/T 50022-2014.
(4), the line density of cotton cellulose diacetate fibers item can be 0.8-3.0dtex, or 1.0-
2.0dtex, line density is discrete≤and 15%, the testing standard used is GB/T 14335-2008.
(5), short fibre content≤6.0% of cotton cellulose diacetate fibers item, the testing standard used is GB/
T20223-2006.Wherein, staple fiber refers to length≤13mm fiber, length≤1.5mm of superbhort fiber, that is, cotton two
Do not occur staple fiber and superbhort fiber substantially in cellulose acetate fibre item.
(6), the over-length fibre content of cotton cellulose diacetate fibers item is 0, and the testing standard used is GB14336-
2008.Over-length fibre is twice of nominal length or more of fiber, including miss cut fibre.
(7), cotton knot≤0.5 of cotton cellulose diacetate fibers item/gram, the testing standard used is FZ/T
50022-2014。
(8), the intensity of cotton cellulose diacetate fibers item be 9-15cN/tex, average elongation at break 9-25%,
The testing standard used is GB/T 14337-2008.
(9), oil content≤0.5% of cotton cellulose diacetate fibers item, regain 6-13%, official regain are
6.5%, the testing standard used is GB/T6504-2008.
(10), content of titanium dioxide≤1% of cotton cellulose diacetate fibers item, the testing standard used is FZ/
T50027-2015。
(11), the fibre section of cotton cellulose diacetate fibers item be I shape (as shown in Figure 1), X-shaped (as shown in Figure 2),
The mixing in the odd-shaped cross sections such as Y shape (as shown in Figure 3), R shape (as shown in Figure 4) or various sections, the testing standard used is FZ/
T50002-2013 chemical fibre degree of profile test method.The fibre section of cotton cellulose diacetate fibers item is used with it
Cellulose diacetate fibers section it is corresponding.
(12), the fiber length distribution of cotton cellulose diacetate fibers item is obeyed Poisson distribution, nearly Poisson distribution or is waited
Long distribution.Nearly Poisson distribution refers to distribution of the degree of fitting coefficient greater than 0.85 of its length distribution curve and Poisson distribution curve.
Above-mentioned cotton cellulose diacetate fibers item in the physical properties such as length, line density with cotton fiber phase
Match, therefore, can be carried out with cotton fiber blended.The various performance parameters of cotton cellulose diacetate fibers item such as the following table 1 institute
Show.
[production method of cotton cellulose diacetate fibers item]
Cotton cellulose diacetate fibers item can be produced using stretch break method comprising following steps:
Cellulose diacetate fibers tow is added to the antistatic agent of 0.5-1wt%, regain is controlled in 6-13%, is not necessarily to
Stand 24 hours and drawing-off pressing mechanism directly fed by roller feeding unit in the horizontal direction, in drawing-off pressing mechanism according to
Secondary progress preliminary draft, secondary drawing-off, dominant draft, secondary crush cutting and main crush cutting, then export via output device, obtain two acetic acid of cotton
Cellulose fibre item.
Cellulose diacetate fibers tow is 20000-50000dtex, and the line density of monofilament is 0.8-3.0dtex, contained
Content≤1% of titanium dioxide, the shape of fibre section are the odd-shaped cross sections such as I shape, X-shaped, Y shape, R shape or above-mentioned various sections
Mixing.The various performance parameters of the production method of cotton cellulose diacetate fibers item are as shown in table 2 below.
As shown in figure 5, secondary drawing-off, dominant draft, secondary crush cutting and main crush cutting are completed in drawing-off pressing mechanism 10.Two acetic acid are fine
Cellulose fiber tow enters drawing-off pressing mechanism 10 along level feeding direction A, leaves this along outbound course B after processing
Drawing-off pressing mechanism 10 simultaneously enters output device (not showing in Fig. 5).The feeding radical of cellulose diacetate fibers tow is 6-
24.Drawing-off pressing mechanism 10 adds cellulose diacetate fibers tow using four area's cooked modes of " under eight on five "
Work.Each upper roller in drawing-off pressing mechanism 10 is rubber roller, and each lower roll is that surface treated steel straight-tooth is trapezoidal
Roller.Upper roller and lower roll should keep certain curable grip, which generallys use pressure medium (such as gas or oil liquid) to provide.
Transmission between lower roll is driven using gear (including electronic gear).
Fig. 5 is only the schematic diagram of cellulose diacetate fibers tow process, is not offered as drawing-off pressing mechanism 10
Size, shape and relative tertiary location relationship of various components etc..
Wherein, preliminary draft is carried out using preliminary draft roller (not showing in Fig. 5), is carried out to cellulose diacetate fibers tow
Preliminary draft, preliminary draft are 0.2-0.3MP to the amount of pressurization of the fiber product of process, and drafting multiple is 1.01-1.1 times.Because of cotton
Fiber type line density is partially thin, so preliminary draft is needed, and other two kinds of fibers then need not move through preliminary draft.
Secondary drawing-off is carried out in secondary draft area 9, and the pair draft area 9 is between 5th bearing seat 5 and fourth bearing seat 4.The
Five bearing blocks include the 5th upper roller and the 5th lower roll, and fourth bearing seat includes under the 4th upper roller and one the 4th
Roller.5th bearing seat and fourth bearing seat are all made of structural shape " one on the other ".It " one on the other " is produced relative to fiber
For product, it is known as "upper" above fiber product, is known as "lower" below fiber product, therefore, " one on one
Under " refer to a upper roller and a lower roll while seizing simultaneously conveying fiber product on both sides by the arms.Below similarly.9 pairs of secondary draft area process
The amount of pressurization of fiber product is 0.2-0.3MP.
Dominant draft is carried out in main drawing area 8, and the main drawing area is between 3rd bearing seat 3 and fourth bearing seat 4.Third
Bearing block 3 includes a third upper roller and two third lower rolls, and fourth bearing seat 4 includes under the 4th upper roller and one the 4th
Roller.3rd bearing seat 3 uses " Chinese character pin-shaped " structural shape of " under two on one "." under two on one " is for fiber product
, it is known as "upper" above fiber product, is known as "lower" below fiber product, therefore, " under two on one " refers to
It is a upper roller and two lower rolls while seizes simultaneously conveying fiber product on both sides by the arms.Below similarly.The fiber product of the 8 pairs of processes in main drawing area
Amount of pressurization be 0.2-0.3MP.The drafting multiple of main drawing area 8 is 1.1-1.3 times.Secondary drawing-off and dominant draft are for producing fiber
Product are straightened.
Secondary crush cutting carries out in secondary crush cutting area 7, and the pair crush cutting area 7 is between second bearing seat 2 and 3rd bearing seat 3.The
Two bearing bracket 2 includes second upper roller and two the second lower rolls.Second bearing seat is tied using the " Chinese character pin-shaped " of " under two on one "
Configuration formula.Second bearing seat is nearby provided with a pair of of needle type static arrester 11, for eliminating the electrostatic of fiber product and preventing
It adsorbs and is wrapped in upper roller, to reach shaping smoothly effect.The amount of pressurization of the fiber product of the 7 pairs of processes in secondary crush cutting area
For 0.4-0.5MP, drafting multiple is 1.6-2 times.
Main crush cutting carries out in main crush cutting area 6, and the main crush cutting area 6 is between first bearing seat 1 and second bearing seat 2.The
One bearing block 1 includes first upper roller and two the first lower rolls.First bearing seat 1 is tied using the " Chinese character pin-shaped " of " under two on one "
Configuration formula.First bearing seat is nearby provided with a pair of of needle type static arrester 12, for eliminating the electrostatic of fiber product and preventing
It adsorbs and is wrapped in upper roller, to reach shaping smoothly effect.The amount of pressurization of the fiber product of the 6 pairs of processes in main crush cutting area
For 0.4-0.5MP, drafting multiple is 1.8-3.5 times.By adjusting between secondary crush cutting area 7 and the bearing block in main crush cutting area 6 away from
From realization acetate fiber principal length between 25-45mm.The gauge in main crush cutting area 6 are as follows: principal length+4mm to principal length+
10mm, that is, the gauge in main crush cutting area 6 4-10mm more than principal length, the gauge in secondary crush cutting area 7 is the gauge in main crush cutting area
1.5-2.5 times, the gauge of preliminary draft area (not shown) and main drawing area 8 is 2-4 times of the gauge of secondary draft area 9.
Four area's cooked modes used by drawing-off pressing mechanism 10 " under eight on five " are easier to obtain no over-length fibre (calmly
Justice is twice and the above person of nominal length, including miss cut fibre is the same below) cotton cellulose diacetate fibers item, simultaneously
The distribution of lengths of obtained cotton cellulose diacetate fibers item can be made to meet Poisson distribution, nearly Poisson distribution or isometric point
Cloth.By the adjusting to specific process parameter, any one in above-mentioned three kinds of distributions may be implemented.
The drafting multiple in above-mentioned each area is as follows: main crush cutting area: 1.8-3.5 times；Secondary crush cutting area: 1.6-2 times；Main drawing area
With secondary draft area: 1.1-1.3；Preliminary draft area: 1.01-1.1.
Preferably, as shown in fig. 6, output device 18 include stepped tooth press formula pressure roller 13, horn mouth 14, can coiler 15,
Pressure roller group 16 (being made of a pair of of pressure roller arranged in parallel), circle bar cylinder 17.The fiber product exported from drawing-off pressing mechanism 10 is first
It is introduced into stepped tooth and presses formula pressure roller 13, formula pressure roller 13 is pressed by stepped tooth to provide cohesive force when fiber product discharge, so
Enter horn mouth 14 afterwards and collect beam shaping, subsequently enter pressure roller group 16 and is output to circle bar cylinder 17.Can coiler 15 and circle item
Cylinder 17 is rotated with certain speed difference, so that ribbon circle is wound in circle bar cylinder 17.Thus it is fine to obtain cotton cellulose diacetate
Tie up item.
It is another preferably, output device is San Xian mechanism comprising horn mouth, upper pressure roller group (including two upper pressure rollers) and
It pushes roller group (including two lower compression rollers).The fiber product exported from drawing-off pressing mechanism enters horn mouth and carries out boundling, then
It sequentially enters pressure roller group and pushes roller group, by the speed difference of upper pressure roller group and pushing roller group by fibre strip shredding at bulk
Short fibre exports to complete fiber in short fine mode.
The comprehensive function of above-mentioned parameter has obtained cotton cellulose diacetate fibers item.
<medium-length cellulose diacetate fibers item>
[property of medium-length cellulose diacetate fibers item]
The various physicochemical properties of medium-length cellulose diacetate fibers item are as follows:
(1), the item weight of medium-length cellulose diacetate fibers item be 5-40g/m, the item weight coefficient of variation≤5.5, use
Testing standard is FZ/T 50022-2014.
(2), the item weight irregularity of medium-length cellulose diacetate fibers item is 0.5-3.0%.
(3), the average fiber length of medium-length cellulose diacetate fibers item can be 51-69mm, or 55-
60mm, discrete length coefficient >=25, the testing standard used is FZ/T 50022-2014.
(4), the fiber linear density of medium-length cellulose diacetate fibers item can be 2.0-4.0dtex, or
2.5-3.5dtex, fiber linear density is discrete≤and 15%, the testing standard used is GB/T 14335-2008.
(5), short fibre content≤6.0% of medium-length cellulose diacetate fibers item, the testing standard used is GB/
T20223-2006.Wherein, staple fiber refers to length≤13mm fiber.That is, base in medium-length cellulose diacetate fibers item
There is not staple fiber in this, does not occur over-length fibre.
(6), the content of the over-length fibre of medium-length cellulose diacetate fibers item be 0, the testing standard used for
GB14336-2008。
(7), cotton knot≤0.5 of medium-length cellulose diacetate fibers item/gram, the testing standard used is FZ/T
50022-2014。
(8), the fibre strength of medium-length cellulose diacetate fibers item is 9-15cN/tex, fiber average elongation at break
For 9-25%, the testing standard used is GB/T 14337-2008.
(9), oil content≤0.5% of medium-length cellulose diacetate fibers item, regain 5-10%, official regain
It is 6.5%, the testing standard used is GB/T6504-2008.
(10), content of titanium dioxide≤1% of medium-length cellulose diacetate fibers item, the testing standard used is FZ/
T50027-2015。
(11), the fibre section of medium-length cellulose diacetate fibers item be the odd-shaped cross sections such as I shape, X-shaped, Y shape, R shape or
The mixing in the various sections of person, the testing standard used is FZ/T50002-2013 chemical fibre degree of profile test method.Medium-length
The fibre section of cellulose diacetate fibers item is corresponding with the section of its used cellulose diacetate fibers.
(12), medium-length cellulose diacetate fibers item fiber length distribution obey Poisson distribution, nearly Poisson distribution or
The isometric distribution of person.It can be realized any one in above-mentioned three kinds of distributions by the adjusting of technique, such as to the pressure of roller and lead
Stretch area, the length of secondary draft area is adjusted.
The various performance parameters of medium-length cellulose diacetate fibers item are as shown in table 1 below.
[production method of medium-length cellulose diacetate fibers item]
Medium-length cellulose diacetate fibers item can be produced using stretch break method comprising following steps:
Cellulose diacetate fibers tow is added to the antistatic agent of 0.5-1wt%, regain is controlled in 5-10%, is not necessarily to
It stands 24 hours and drawing-off pressing mechanism 20 is directly fed by roller feeding unit in the horizontal direction, in drawing-off pressing mechanism 20
In successively carry out drawing-off, secondary crush cutting and main crush cutting, exported subsequently into output device and by the output device, obtain medium-length
Cellulose diacetate fibers item.Medium-length cellulose diacetate fibers preliminary draft area length is 0, that is, needs not move through pre- lead
It stretches.
Cellulose diacetate fibers tow is 20000-50000dtex, and the line density of monofilament is 2.0-4.0dtex, contained
Content≤1% of titanium dioxide, the shape of fibre section are the odd-shaped cross sections such as I shape, X-shaped, Y shape, R shape or above-mentioned various sections
Mixing.Such as figure.The various performance parameters of the production method of medium-length cellulose diacetate fibers item are as shown in table 2 below.
As shown in fig. 7, drawing-off, secondary crush cutting and main crush cutting are completed in drawing-off pressing mechanism 20.Cellulose diacetate fibers
Tow enters drawing-off pressing mechanism 20 along level feeding direction A, leaves drawing-off pressurization along outbound course B after processing
Mechanism 20 simultaneously enters output device (not shown).Drawing-off pressing mechanism 20 uses three area's cooked modes pair of " under seven on four "
Cellulose diacetate fibers tow is processed.Each upper roller in drawing-off pressing mechanism 20 is rubber roller, and each lower roll is
The surface treated trapezoidal roller of steel straight-tooth.Upper roller and lower roll should keep certain curable grip, which, which generallys use, adds
Medium (such as gas or oil liquid) is pressed to provide.Transmission between lower roll is driven using gear (including electronic gear).
Fig. 7 is only the schematic diagram of cellulose diacetate fibers tow process, is not offered as drawing-off pressing mechanism 20
Size, shape and relative tertiary location relationship of various components etc..
Wherein, medium-length cellulose diacetate fibers item needs not move through preliminary draft namely the length of its preliminary draft area is
0。
Drawing-off is carried out in draft area 28, and the draft area is between 3rd bearing seat 23 and fourth bearing seat 24.Third axis
Holding seat 23 includes a third upper roller and two third lower rolls, and fourth bearing seat 24 includes under the 4th upper roller and one the 4th
Roller.3rd bearing seat 23 uses the structural shape of " under two on one "." under two on one " is located at for fiber product
It is known as "upper" above fiber product, is known as "lower" below fiber product, therefore, " under two on one " refers on one
Roller and two lower rolls seize simultaneously conveying fiber product on both sides by the arms simultaneously.Below similarly.The amount of pressurization of the fiber product of the 28 pairs of processes in draft area
For 0.2-0.3MP.The drafting multiple of draft area 28 is 1.1-1.4 times.Drawing-off is for fiber product to be straightened.Draft area 28 every
Away from for 300-400mm.
Secondary crush cutting carries out in secondary crush cutting area 27, the pair crush cutting area 27 be located at second bearing seat 22 and 3rd bearing seat 23 it
Between.Second bearing seat 22 includes second upper roller and two the second lower rolls.Second bearing seat uses the structure of " under two on one "
Pattern.Second bearing seat is nearby provided with a pair of of needle type static arrester 31, for eliminating the electrostatic of fiber product and preventing it
It adsorbs and is wrapped in upper roller, to reach shaping smoothly effect.The amount of pressurization of the fiber product of the 27 pairs of processes in secondary crush cutting area
For 0.4-0.5MP, drafting multiple is 1.6-2 times.
Main crush cutting carries out in main crush cutting area 26, the main crush cutting area 26 be located at first bearing seat 21 and second bearing seat 22 it
Between.First bearing seat 21 includes first upper roller and two the first lower rolls.First bearing seat 21 uses the knot of " under two on one "
Configuration formula.First bearing seat is nearby provided with a pair of of needle type static arrester 32, for eliminating the electrostatic of fiber product and preventing
It adsorbs and is wrapped in upper roller, to reach shaping smoothly effect.The pressurization of the fiber product of the 26 pairs of processes in main crush cutting area
Amount is 0.4-0.5MP, and drafting multiple is 1.8-3.2 times.By adjusting between secondary crush cutting area 27 and the bearing block in main crush cutting area 26
Distance realize acetate fiber principal length between 51-69mm.The gauge in main crush cutting area 26 are as follows: principal length+4mm to main body
Length+10mm, that is, the gauge in main crush cutting area 26 4-10mm more than principal length, the gauge in secondary crush cutting area 27 is main crush cutting area
1.5-2.5 times of gauge.
Three area's cooked modes used by drawing-off pressing mechanism 20 " under seven on four " are easier to obtain not over-length fibre
Medium-length cellulose diacetate fibers item, while the distribution of lengths of obtained medium-length cellulose diacetate fibers item can be made
Meet Poisson distribution, so that item is dry uniform on the yarn being spun into.
The drafting multiple in above-mentioned each area is as follows: main crush cutting area: 1.8-3.2 times；Secondary crush cutting area: 1.6-2 times；Draft area:
1.1-1.4；Preliminary draft area: 0.Medium-length cellulose diacetate fibers preliminary draft area length is 0, that is, needs not move through pre- lead
It stretches.
The amount of pressurization in above-mentioned each area is as follows: main crush cutting area and secondary crush cutting area are as follows: 0.4-0.5MP；Draft area are as follows: 0.2-
0.3MP。
Three area's cooked modes used by drawing-off pressing mechanism " under seven on four " can make obtained two vinegar of medium-length
The distribution of lengths of cellulosic fibers item meets nearly Poisson distribution.
For medium-length cellulose diacetate fibers item, draft area is driven using gear (including electronic gear).
The comprehensive function of above-mentioned parameter has obtained medium-length cellulose diacetate fibers item.
<wool type cellulose diacetate fibers item>
[property of wool type cellulose diacetate fibers item]
The various physicochemical properties of wool type cellulose diacetate fibers item are as follows:
(1), the item weight of wool type cellulose diacetate fibers item is 5-40g/m, the item weight coefficient of variation≤5.5, the survey of use
Test-object standard is FZ/T 50022-2014.
(2), the item weight irregularity of wool type cellulose diacetate fibers item is 0.5-3.0%.
(3), the average fiber length of wool type cellulose diacetate fibers item can be 70-150mm, or 80-
120mm can also be 90-100mm, and discrete length coefficient >=30, the testing standard used is FZ/T 50022-2014.
(4), the fiber linear density of wool type cellulose diacetate fibers item can be 2.0-8.5dtex, or 3.0-
8.0dtex can also be 5.0-7.0dtex, can be realized by the adjustment of technological parameter, fiber linear density is discrete≤and 15%,
The testing standard used is GB/T 14335-2008.
(5), short fibre content≤6.0% of wool type cellulose diacetate fibers item, the testing standard used is GB/
T20223-2006.Wherein, staple fiber refers to length≤13mm fiber.That is, basic in wool type cellulose diacetate fibers item
There is not staple fiber, does not occur over-length fibre.
(6), the content of the over-length fibre of wool type cellulose diacetate fibers item be 0, the testing standard used for
GB14336-2008。
(7), card nailing neps≤0.5 of wool type cellulose diacetate fibers item/gram, the testing standard used is FZ/T
50022-2014。
(8), the fibre strength of wool type cellulose diacetate fibers item is 9-15cN/tex, and fiber average elongation at break is
9-25%, the testing standard used is GB/T 14337-2008.
(9), oil content≤0.5% of wool type cellulose diacetate fibers item, regain 5-9%, the test mark of use
Standard is GB/T6504-2008.
(10), content of titanium dioxide≤1% of wool type cellulose diacetate fibers item, the testing standard used is FZ/
T50027-2015。
(11), the fibre section of wool type cellulose diacetate fibers item be the odd-shaped cross sections such as I shape, X-shaped, Y shape, R shape or
The mixing in various sections, the testing standard used is FZ/T50002-2013 chemical fibre degree of profile test method.Two vinegar of wool type
The fibre section of cellulosic fibers item is corresponding with the section of its used cellulose diacetate fibers.
(12), wool type cellulose diacetate fibers item fiber length distribution obey Poisson distribution, nearly Poisson distribution or
Isometric distribution.
Above-mentioned wool type cellulose diacetate fibers item in the physical properties such as length, line density with wool fiber phase
Match, therefore, can be carried out with wool fiber blended.The various performance parameters of wool type cellulose diacetate fibers item such as the following table 1 institute
Show.
[production method of wool type cellulose diacetate fibers item]
Wool type cellulose diacetate fibers item can be produced using stretch break method comprising following steps:
Cellulose diacetate fibers tow is added to the antistatic agent of 0.5-1wt%, regain is controlled in 5-9%, is not necessarily to
It stands 24 hours and drawing-off pressing mechanism 40 is directly fed by roller feeding unit in the horizontal direction, in drawing-off pressing mechanism 40
In successively carry out drawing-off, secondary crush cutting and main crush cutting, exported subsequently into output device and by the output device, obtain wool type two
Cellulose acetate fibre item.
Cellulose diacetate fibers tow is 20000-50000dtex, and the line density of monofilament is 2.0-8.5dtex, contained
Content≤1% of titanium dioxide, the shape of fibre section are the odd-shaped cross sections such as I shape, X-shaped, Y shape, R shape or above-mentioned various sections
Mixing.Such as figure.The various performance parameters of the production method of wool type cellulose diacetate fibers item are as shown in table 2 below.
As shown in figure 8, drawing-off, secondary crush cutting and main crush cutting are completed in drawing-off pressing mechanism 40.Cellulose diacetate fibers
Tow enters drawing-off pressing mechanism 40 along level feeding direction A, leaves drawing-off pressurization along outbound course B after processing
Mechanism 40 simultaneously enters output device (not shown).Drawing-off pressing mechanism 40 uses three area's cooked modes pair of " under seven on four "
Cellulose diacetate fibers tow is processed.Each upper roller in drawing-off pressing mechanism 40 is rubber roller, and each lower roll is
The surface treated trapezoidal roller of steel straight-tooth.Upper roller and lower roll should keep certain curable grip, which, which generallys use, adds
Medium (such as gas or oil liquid) is pressed to provide.Transmission between lower roll is driven using gear (including electronic gear).
Fig. 8 is only the schematic diagram of cellulose diacetate fibers tow process, is not offered as drawing-off pressing mechanism 40
Size, shape and relative tertiary location relationship of various components etc..
Wherein, drawing-off is carried out in draft area 48, and the draft area is between 3rd bearing seat 43 and fourth bearing seat 44.The
Three bearing blocks 43 include a third upper roller and two third lower rolls, and fourth bearing seat 44 includes the 4th upper roller and one the
Four lower rolls.3rd bearing seat 43 uses the structural shape of " under two on one "." under two on one " be for fiber product,
It is known as "upper" above fiber product, is known as "lower" below fiber product, therefore, " under two on one " refers to one
A upper roller and two lower rolls seize simultaneously conveying fiber product on both sides by the arms simultaneously.Below similarly.The fiber product of the 48 pairs of processes in draft area adds
Pressure amount is 0.2-0.3MP.The drafting multiple of draft area 48 is 1.1-1.5 times.Drawing-off is for fiber product to be straightened.Draft area 48
Gauge be 350-450mm.
Secondary crush cutting carries out in secondary crush cutting area 47, the pair crush cutting area 47 be located at second bearing seat 42 and 3rd bearing seat 43 it
Between.Second bearing seat 42 includes second upper roller and two the second lower rolls.Second bearing seat uses the structure of " under two on one "
Pattern.Second bearing seat is nearby provided with a pair of of needle type static arrester 51, for eliminating the electrostatic of fiber product and preventing it
It adsorbs and is wrapped in upper roller, to reach shaping smoothly effect.The amount of pressurization of the fiber product of the 47 pairs of processes in secondary crush cutting area
For 0.4-0.5MP, drafting multiple is 1.6-2 times.
Main crush cutting carries out in main crush cutting area 46, the main crush cutting area 46 be located at first bearing seat 41 and second bearing seat 42 it
Between.First bearing seat 41 includes first upper roller and two the first lower rolls.First bearing seat 41 uses the knot of " under two on one "
Configuration formula.First bearing seat is nearby provided with a pair of of needle type static arrester 52, for eliminating the electrostatic of fiber product and preventing
It adsorbs and is wrapped in upper roller, to reach shaping smoothly effect.The pressurization of the fiber product of the 46 pairs of processes in main crush cutting area
Amount is 0.4-0.5MP, and drafting multiple is 1.8-3.5 times.By adjusting between secondary crush cutting area 47 and the bearing block in main crush cutting area 46
Distance realize acetate fiber principal length between 70-150mm.The gauge in main crush cutting area 46 are as follows: principal length+4mm to master
Body length+10mm, that is, the gauge in main crush cutting area 46 4-10mm more than principal length, the gauge in secondary crush cutting area 47 is main crush cutting
1.5-2.5 times of the gauge in area.
Three area's cooked modes used by drawing-off pressing mechanism 40 " under seven on four " are easier to obtain not over-length fibre
Wool type cellulose diacetate fibers item, while the distribution of lengths of obtained wool type cellulose diacetate fibers item can be made to meet
Poisson distribution.
The drafting multiple in above-mentioned each area is as follows: main crush cutting area: 1.8-3.5 times；Secondary crush cutting area: 1.6-2 times；Draft area:
1.1-1.5；Preliminary draft area: 0.
The amount of pressurization in above-mentioned each area is as follows: main crush cutting area and secondary crush cutting area are as follows: 0.4-0.5MP；Draft area are as follows: 0.2-
0.3MP。
Wool type cellulose diacetate fibers preliminary draft area length is 0, that is, needs not move through preliminary draft.
Three area's cooked modes used by drawing-off pressing mechanism " under seven on four " can make obtained two acetic acid of wool type
The distribution of lengths of cellulose fibre item meets nearly Poisson distribution, nearly Poisson distribution or isometric distribution.
For wool type cellulose diacetate fibers item, draft area is driven using sprocket wheel.
Three area's cooked modes used by drawing-off pressing mechanism " under seven on four " can make obtained two acetic acid of wool type
The distribution of lengths of cellulose fibre item meets nearly Poisson distribution.Nearly Poisson distribution refers to length distribution curve and Poisson distribution curve
Degree of fitting coefficient be greater than 0.85.
The comprehensive function of above-mentioned parameter has obtained wool type cellulose diacetate fibers item.
The various performance parameters table of the three kinds of cellulose diacetate fibers items of the invention of table 1
The process parameter table of the three kinds of cellulose diacetate fibers items of the invention of table 2
The present invention is further illustrated with reference to embodiments.
Embodiment 1 (cotton cellulose diacetate fibers item)
Present embodiments provide a kind of preparation method of cotton cellulose diacetate fibers item comprising following steps:
Cellulose diacetate fibers tow is added to the antistatic agent of 0.71wt%, control regain is 8%, without standing
24 hours and drawing-off pressing mechanism is directly fed by roller feeding unit in the horizontal direction, in drawing-off pressing mechanism successively into
Row preliminary draft, secondary drawing-off, dominant draft, secondary crush cutting and main crush cutting, export subsequently into output device and by the output device, obtain
To cotton cellulose diacetate fibers item, average bulk length is 38mm.
Wherein, cellulose diacetate fibers tow is 44000dtex, and the line density of monofilament is 2.0dtex, contained titanium dioxide
The content of titanium is 0.36%, and the shape of fibre section is Y shape.
The preparation parameter of the present embodiment is as shown in table 3 below, the property of cotton cellulose diacetate fibers item such as the following table 4 institute
Show.
Embodiment 2 (medium-length cellulose diacetate fibers item)
Present embodiments provide a kind of production method of medium-length cellulose diacetate fibers item comprising following steps:
Cellulose diacetate fibers tow is added to the antistatic agent of 0.65wt%, control regain is 6.0%, without quiet
It sets 24 hours and drawing-off pressing mechanism 20 is directly fed by roller feeding unit in the horizontal direction, in drawing-off pressing mechanism 20
Drawing-off, secondary crush cutting and main crush cutting are successively carried out, is exported subsequently into output device and by the output device, obtains medium-length two
Cellulose acetate fibre item.Medium-length cellulose diacetate fibers preliminary draft area length is 0, that is, needs not move through preliminary draft.
Wherein, cellulose diacetate fibers tow is 45000dtex, and the line density of monofilament is 2.2dtex, contained titanium dioxide
The content of titanium is 0.36%, and the shape of fibre section is Y shape.
The preparation parameter of the present embodiment is as shown in table 3 below, the property of medium-length cellulose diacetate fibers item such as the following table 4 institute
Show.
Embodiment 3 (wool type cellulose diacetate fibers item)
Present embodiments provide a kind of production method of wool type cellulose diacetate fibers item comprising following steps:
Cellulose diacetate fibers tow is added to the antistatic agent of 0.5wt%, control regain is 8.8%, without quiet
It sets 24 hours and drawing-off pressing mechanism 40 is directly fed by roller feeding unit in the horizontal direction, in drawing-off pressing mechanism 40
Drawing-off, secondary crush cutting and main crush cutting are successively carried out, is exported subsequently into output device and by the output device, obtains two vinegar of wool type
Cellulosic fibers item.
Cellulose diacetate fibers tow is 40000dtex, and the line density of monofilament is 2.4dtex, contained titanium dioxide
Content≤1%, the shape of fibre section are the mixing in the odd-shaped cross sections such as I shape, X-shaped, Y shape, R shape or above-mentioned various sections.
The preparation parameter of the present embodiment is as shown in table 3 below, the property of medium-length cellulose diacetate fibers item such as the following table 4 institute
Show.
The various performance parameters table of three kinds of cellulose diacetate fibers items in 3 embodiment of the present invention of table
The preparation technology parameter table of the three kinds of cellulose diacetate fibers items of the invention of table 4
This hair can be understood and used the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments,
Those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in this hairs
Within bright protection scope.
Claims (12)
1. a kind of cotton cellulose diacetate fibers item, it is characterised in that: the average master of the cotton cellulose diacetate fibers item
Body length is 25-45mm, line density 0.8-3.0dtex.
2. cotton cellulose diacetate fibers item according to claim 1, it is characterised in that: the cellulose diacetate
The mean intensity of fiber is 9-15cN/tex, average elongation at break 9-25%；And/or
The item weight irregularity of the cotton cellulose diacetate fibers item is 0.5-3.0%；And/or
Cotton knot≤0.5 of the cotton cellulose diacetate fibers item/gram；And/or
The item weight of the cotton cellulose diacetate fibers item is 3-30g/m；And/or
The official regain of the cotton cellulose diacetate fibers item is 6.5%.
3. a kind of preparation method of cotton cellulose diacetate fibers item, characterized by the following steps:
The cellulose diacetate fibers tow of 20000-50000dtex is added to the antistatic agent of 0.5-1wt%, controls regain
In 6-13%, preliminary draft, secondary drawing-off, dominant draft, secondary crush cutting and main crush cutting are directly successively carried out without standing, obtains cotton two
Cellulose acetate fibre item.
4. preparation method according to claim 3, it is characterised in that:
The amount of pressurization of the preliminary draft is 0.2-0.3MP, and drafting multiple is 1.01-1.1 times；And/or
The amount of pressurization of the pair drawing-off is 0.2-0.3MP, and drafting multiple is 1.1-1.3 times；And/or
The amount of pressurization of the dominant draft is 0.2-0.3MP, and drafting multiple is 1.1-1.3 times；And/or
The amount of pressurization of the pair crush cutting is 0.4-0.5MP, and drafting multiple is 1.6-2 times；And/or
The amount of pressurization of the main crush cutting is 0.4-0.5MP, and drafting multiple is 1.8-3.5 times.
5. a kind of medium-length cellulose diacetate fibers item, it is characterised in that: the medium-length cellulose diacetate fibers item is put down
Equal principal length is 51-69mm, line density 2.0-4.0dtex.
6. medium-length cellulose diacetate fibers item according to claim 1, it is characterised in that: the diacetate fiber
The mean intensity of cellulose fiber is 9-15cN/tex, average elongation at break 9-25%；And/or
The item weight irregularity of the medium-length cellulose diacetate fibers item is 0.5-3.0%；And/or
Cotton knot≤0.5 of the medium-length cellulose diacetate fibers item/gram；And/or
The item weight of the medium-length cellulose diacetate fibers item is 5-40g/m；And/or
The official regain of the medium-length cellulose diacetate fibers item is 6.5%.
7. a kind of preparation method of medium-length cellulose diacetate fibers item, characterized by the following steps:
The cellulose diacetate fibers tow of 20000-50000dtex is added to the antistatic agent of 0.5-1wt%, controls regain
In 5-10%, drawing-off, secondary crush cutting and main crush cutting are directly successively carried out without standing 24 hours, obtains medium-length diacetate fiber
Cellulose fiber item.
8. preparation method according to claim 7, it is characterised in that:
The amount of pressurization of the drawing-off is 0.2-0.3MP, and drafting multiple is 1.1-1.4 times；And/or
The amount of pressurization of the pair crush cutting is 0.4-0.5MP, and drafting multiple is 1.6-2 times；And/or
The amount of pressurization of the main crush cutting is 0.4-0.5MP, and drafting multiple is 1.8-3.2 times.
9. a kind of wool type cellulose diacetate fibers item, it is characterised in that: the average master of the wool type cellulose diacetate fibers item
Body length is 70-150mm, line density 2.0-8.5dtex.
10. wool type cellulose diacetate fibers item according to claim 1, it is characterised in that: the diacetate fiber
The mean intensity of cellulose fiber is 9-15cN/tex, average elongation at break 9-25%, line density 2.0-8.5dtex；With/
Or,
The item weight irregularity of the wool type cellulose diacetate fibers item is 0.5-3.0%；And/or
Card nailing neps≤0.5 of the wool type cellulose diacetate fibers item/gram；And/or
The item weight of the wool type cellulose diacetate fibers item is 5-40g/m；And/or
The official regain of the wool type cellulose diacetate fibers item is 6.5%.
11. a kind of preparation method of wool type cellulose diacetate fibers item, characterized by the following steps:
The cellulose diacetate fibers tow of 20000-50000dtex is added to the antistatic agent of 0.5-1wt%, controls regain
In 5-9%, drawing-off, secondary crush cutting and main crush cutting are directly successively carried out without standing 24 hours, obtains wool type cellulose diacetate
Ribbon.
12. preparation method according to claim 11, it is characterised in that:
The amount of pressurization of the drawing-off is 0.2-0.3MP, and drafting multiple is 1.1-1.5 times；And/or
The amount of pressurization of the pair crush cutting is 0.4-0.5MP, and drafting multiple is 1.6-2 times；And/or
The amount of pressurization of the main crush cutting is 0.4-0.5MP, and drafting multiple is 1.8-3.5 times.
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