JPH0233335A - Polyester short fiber for spinning - Google Patents

Abstract

PURPOSE:To obtain the subject short fiber excellent in passableness through fore-spinning and capable of providing fabrics having soft feeling by blending plural polyester short fibers having a size and blending ratio satisfying specific relationships in a packing bale for conveying polyester short fibers after production to a spinning machine. CONSTITUTION:A tow (Y1) of polyester thick-denier fibers and a tow (Y2) of fine-denier fibers are fed through guide rollers (G1) and (G2) to cutters (C1) and (C2) and cut to prepare thick-denier short fibers (S1) and fine-denier short fibers (S2), which are then blown away using a compressed air nozzles (N1) and (N2), opened and mixed in a chute 1 and blended in a packing bale (B) for conveying to a spinning machine to afford the objective short fibers satisfying formula I [D1 is size (de) of the thick-denier short fiber; D2 is size (de) of the fine-denier short fiber], formulas II, III and IV [M1 is blending ratio (wt.%) of the thick-denier short fiber], formula V [M2 is blending ratio (wt.%) of the fine-denier short fiber] and formulas VI and VII [L1 is the average fiber length (mm) of the thick-denier short fiber; L2 is the average fiber length (mm) of the fine-denier short fiber].

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is made of 100% polyester or other polyester! This invention relates to short polyester fibers for spinning used for blending with in.

[Conventional technology]

Spun yarn and none using polyester short fibers.

The fabric using the spun yarn 1 is 1. It has been a problem for many years as it lacks fullness, lacks a soft feel, and has a so-called paper-like texture. This paper-like feel is also a problem in the case of t=spinning obtained by blending the polyester short fibers with other wA$1, and it was not possible to obtain a fabric of first grade quality.

In order to overcome this drawback, attempts have been made to use polyester short III with embroidered denier.
In this way, fabrics using polyester staple fibers of high denier have a TPI, soft F2 texture, but on the other hand, they lack fullness, and they also lack resilience, which is a characteristic required for fabrics. A new problem is emerging. Roughly embroidered denier polyester short fibers, especially its single denier.

1. With polyester short fibers having an Ode or less, neps and unevenness occur in the carding process, which is the opening process, and therefore, even if measures such as lowering the docker rotation speed in the carding process are taken, it is not sufficient.

This is a problem as productivity drops significantly.

As another method, attempts have been made to blend different cut lengths by changing only the cut length without changing the denier ft (EP2419B publication), but although this method slightly improves the fullness of the fabric, it lacks a soft feel. Furthermore, only the cut length can be shortened without changing the number of spun yarns, so ti! There is a drawback that the 3-strand yarn strength is low T.

In addition, as a more advanced method, thick denier 1 with a long cut length is used.
A method has been proposed in which A-fibers and short-cut denier fibers are blended in the spinning process. (Unexamined Japanese Patent Publication No. 59-26537
Publication No. i) Although this method is improved compared to the above-mentioned method, it is still insufficient in terms of the uniformity and fusion of the spun yarn, and the drawbacks of reduced productivity remain unsolved. .

This uses embroidered denier fibers as configuration 1an, and there is a large denier difference between ams, so if the mixing method is used in the normal spinning process, that is, the mixing method in the batting process or the filament process, the blending between the fibers will be poor. It is thought that this is because of this.

[Purpose of the invention]

The present invention solves the problems of the conventional spinning process and enables uniform blending while maintaining high productivity in a normal spinning process, which has not been possible in the past. The purpose of the present invention is to provide short polyester fibers that enable the production of fabrics that have fullness and soft texture.

[Structure of the invention]

The present invention is for spinning, characterized in that two or more rods of polyester staple fibers are mixed together in a packing bale that is transferred from the manufacturing process of polyester staple fibers to the spinning process, and each staple fiber satisfies the following formula: Polyester short m fiber.

4.50≧DI/D2≧1.25 ---1~--(l
.

1.8≧D1≧1.0 −−−−−−− (
2) 1.0>D2≧0.4 --------
(3) 66≧Ml≧5 --------
− (4) 95≧M2≧35 −−−−−
-- (5) 18.1D+26≧L≧10.2D+10
44≧L! ≧1 , 13 L 2 --------
- (7) However, D1 = fineness of thick denier short fibers (d e) D2: fineness of JI denier short fibers (d e) Ml: blending ratio of thick denier short fibers (wt%) M2: blending ratio of il denier short fibers (
wt%)L: Average fiber length of short mv1: m m)L
I: Average fiber length of thick denier staple fibers L2: m
It is the average fiber length (〃) of denier staple fibers.

The polyester in the present invention is preferably polyethylene terephthalate, but some of its acid components and/or diol components include isophthalic acid, 5-sodium sulfoisophthalic acid, dicarboxylic acids, diethylene glycol, 1,4-butanesool, It may also be a copolymerized polyester substituted with a diol such as polyethylene glycol. A matting agent, optical brightener, antistatic agent, flame retardant, etc. may be added to these polyesters.

Spinning in the present invention includes everything that passes through the carding process.

In the present invention, one of the short polyester fibers is a single yarn.
) I, D2 is 1.0>D2 ≧0.4 (7)! ! i
You can use a 391 denier one! It is essential. A more preferable range of single yarn denier D2 is 0.8≧D2≧0.4, but in any case, in order to obtain a yarn with a soft texture, a fine denier must be used. It is not preferable to use threads with a thread denier D2 of 0.4 beak because the passability in the carding process will be reduced.

Next 24 In the present invention, in order to eliminate the defects caused by the blended yarn using the denier, one of the polyester staple fibers is used, in which the m yarn denier D1 is 1.8≧D1≧1.0.
Noil! Use the thick denier ones in the box. If Dl exceeds 1.8 d e, the texture will be rough and the texture will be rough.
．． If it is less than 0 de, productivity in the spinning process decreases, which is not good.

In addition, the blending ratio of thick denier polyester short fibers Mli%
) is 65≧Ml≧ in order to exhibit the effect of cotton blending (2)
It needs to be in the range of 5.

The range of 40≧Ml≧10 is preferable.

Such a low blended thick denier polyester 9KN
When m is mixed with polyester short fibers of a bundle denier in which the single yarn denier D2 is within the above range in a clogging spinning process, it tends to behave in its own way, is not mixed uniformly, and tends to cause yarn unevenness. What is the cause of this phenomenon?
I'm not sure.

One of the reasons for this is that when the IM denier D2 is in the above range, the surface area of the fine denier fibers increases significantly, and the R friction between the m fibers becomes large.

the result,! 1 denier il! 1 and thick denier 3111
This is thought to be due to poor fitting of No. 11. IJ like this! In order to overcome the defects caused by defects, it is necessary to transfer the polyester short fibers from the N manufacturing process to the spinning process! It is effective that two or more types of short polyester fibers are blended in the wrapper, preferably substantially uniformly. In the spinning process, the molten polymer is discharged from a nozzle of a spinneret and collected as a yarn sub-tow.In the second drawing process, a large number of the above-mentioned sub-tows are bundled with a yarn creel to form a raw yarn tow. After heating and stretching, tension heat setting and crimping are applied.

Relaxation fever 9! After going through the Suri process, it is cut into t-length lengths and wrapped in a veil. Methods for uniformly mixing two-denier short polyester fibers of the same cut length in these processes are: - A method of spinning and blending fibers of different deniers using the same spinneret with nozzles of appropriate dimensions. ■Spinning machine') Attach a spinneret at the weighing position and spin the yarn? It is desirable to adopt the methods described in H., (1) a method in which raw yarns of different deniers are spun in each spinning machine, and raw yarns of different deniers are iffed using a yarn creel in the drawing process, as well as silk combinations of these methods. . Particularly from the point of view of uniform fibers, methods (1) and (2) above are desirable.

As a method for uniformly mixing polyester short fibers of different deniers and different cut lengths, for example, a holding position as shown in FIG. 1 is adopted. That is, tow Y1 made of thick denier fibers and tow Y2 made of fine denier fibers, which have been separately crimped, crimped and heat-set, are sewn with kite rollers G+ and G2 under high tension with tension bars TI and T2. to separate cutters CI and C2 and separate! lllll
Shukan SL cut to length and falling under its own weight
, S2 is the compressed air provided under the cutter, °zzle Nl, N
Blow it out with compressed air using No. 2, and open the fibers using Shoe No. 1.

It is obtained by a method of mixing and dropping onto a conveyor 2 driven by rollers 4. Note that 3 is a compressed air outlet. By supplying the tow to the cutter with high tension, the tow can be easily opened, and the thick denier fiber S1 and the denier bundle S2 can be mixed more uniformly.

The fine denier fiber S2, which is particularly difficult to open, falls in the form of chips after being counted, but is easily opened by being strongly blown with compressed air from the side by the compressed air nozzle N2.

On the other hand, in the normal spinning process, thick denier fiber S1
And denier M! It is considered that thick denier ml & iI S 1 is easier to open because it is mixed with fiber S2 and fiber S2 is mixed with fiber S2, and on the other hand, small denier* dark blue S2 is difficult to open for the above-mentioned reason.

The number of turns wA of the thick denier fiber is preferably 9 to 15 pieces/in, and more preferably 11 to 14 pieces/in.

)! l! If the number is less than 9, the entanglement between the fibers will be reduced and the passability of the spinning card process will be reduced, which is undesirable.On the other hand, if the Hlink is 15 or Mi thicker, the entanglement between the fibers will become too strong and rj! *Denier 311
This is not preferable because it does not mix uniformly with 1.

The number of crimps of the fine denier fiber is preferably 11 to 17 crimps/1n, and more preferably 13 to 15 crimps/l.
*If a is less than 11, the entanglement of the fibers will decrease and the passability of the spinning card process will decrease, which is undesirable.On the other hand, if the number of crimp exceeds 16, the entanglement between the fibers will become too strong and it will be difficult to pass through the carding process of spinning. This is not preferable because it becomes difficult to mix with thick denier fibers.

The mixed wA fibers on the conveyor 2 are transferred to a packing machine.

It is compressed and packed as a packing bale. As a measure of uniform mixing in the packing bale, 100g of gauzen was sampled from corner parts 5 to 12 indicated by the circles in Figure 2, and each part was placed on a flat card to create slivers, and the first sliver and the last sliver were For each sliver, calculate the ratio of the number of slivers for each denier from a micrograph of one cross-section of the sliver. It is preferable that all the fibers are included in the sample.In particular, the average value of the 8 parts and the ratio of the number of fibers by denier of the samples obtained from each part of 5 to 12, and the average value of each part It is preferable that the difference between the values is within 30% of the average value.

Next, the polyester short fibers used in the present invention are as follows.

The denier D and fiber length can be selected so as to satisfy the formula (6), but in particular, polyester short polyester with a denier of 'a' has traditionally had poor passability in the carding process and is prone to neps and unevenness. In order to reduce such neps and unevenness, the fiber length L 2 (m −TI ) should be shortened according to the denier, for example in 1911.
If D2=0.4de, the fiber length is 32.4≧L
Those between ≧14.08 are used. If the same thick denier short polyester fiber is used as the thick denier short polyester fiber to be mixed with this, yarn unevenness will occur, which is thought to be caused by the above phenomenon. ! It has been found that this problem can be alleviated by making the length longer.

Furthermore, if the length 2 of the denier polyester short fibers is shortened, neps and unevenness can be reduced as described above, but
On the other hand, if the mu length becomes short, the fiber arrangement of the wrapped denier polyester short fibers cannot be increased in the blended yarn, and there is a problem that the gloss of the blended yarn is significantly reduced.

However, when using thick denier polyester short fibers with a large fiber length Ll, the length of the denier polyester short m&t? The gloss of the blended yarn is improved, probably due to improved alignment in the HVj yarn.

In order to obtain such functions and effects, the upper lengths Ll and L2 of the short polyester fibers must satisfy formulas (6) and (7).

Note that in the present invention, the above-described two types of thick denier fibers and medium denier fibers are sufficient to obtain certain effects, but in the present invention, the l! If it is in the mouth, it is okay to mix it with medium denier matte.-A.

〔Effect of the invention〕

In this way, the polyester short fibers of the present invention are made by combining thick denier fibers that satisfy formulas (1) to (7) and a woven denier am to overcome the drawbacks when using polyester short fibers with a woven denier. Compared to blended cotton in the conventional spinning process, #j
In the i-weaving process, we were able to improve productivity and quality of the spun yarn, and in the final mW product, we were able to achieve both softness, drapability, and resilience that could not be obtained with conventional technology.

In terms of improving productivity and quality of spun yarn in the spinning process, 2. In the case of blended cotton in the conventional spinning process, it is of course a single fiber in the carding process.

Even in the case of striped blends, there is still not enough cotton mixed in the carding process, and sufficient effects cannot be obtained even if thick denier fibers are used.In contrast, in the case of the present invention, fine denier fibers and thick denier fibers By being well mixed, the 31 denier 1ait is retained in the thick denier fibers, which dramatically improves the passability of the pre-spinning compared to blended cotton in the spinning process, greatly improving productivity and spun yarn quality. What I was able to improve on: I
! I^ru.

Final 1! 4 of the present invention regarding improving the texture of Sho's IIW products.
In this case, it is believed that due to the improved blendability, the blending state of thick and denier woven fibers within the spun yarn was made uniform, and the characteristics of Ryōborosho were effectively combined.

The short polyester fibers of the present invention can be effectively applied not only to ordinary spinning processes but also to non-Ia fabrics, stuffed cotton, and raised products.

Next is the fruit! ! 1 provides a detailed explanation of the present invention.

〔Example〕

A polyethylene terephthalate chip with an intrinsic viscosity of 0.65 was melted at 300°C and discharged at 285°C through a nozzle with 12D0 holes.

It was taken at a speed of 1000 m/min. At this time, the discharge amount was varied to obtain undrawn yarns with different finenesses.

400,000 denier tow and 2.8 times stretching.
After being subjected to tension heat treatment at a temperature of 2D0°C, a winding layer was applied and 14
The fiber denier is 0-4. 0.8. 1.5. Four types of tows of 1.7 de were obtained.

When two types of tows were to be compressed, they were cut into various lengths using the device shown in Figure 1 and packed into bales of 2D0 kg as mixed fibers.

When cutting three tows, one more cutter is added to the device shown in Figure 1, and the three-way mixture is E7 hF!
Cut it into various lengths with a suitable device and make 2D0K as a mixed fiber.
It was packed in a large container.

Furthermore, the poly 1 stellite fiber is subjected to the usual batting process, carding process, and filament process to obtain an English-style long count of 30', 5.
0', (DvJn yarn fe obtained.

Using the spun yarn 50' for warp and weft, 144 warp yarns/2
．． 54cm, plain weave with a density of 80 wefts/2-54cm! The evaluation was conducted using a fabric that was woven into AM and underwent a normal finishing process. The results are shown in Table 1.

In addition, using the spun yarn 308, a cotton jersey (28 gauge) was knitted and subjected to two ordinary finishing steps to produce a knitted fabric for evaluation. The results are also shown in Table 1.

For comparison, a thick denier mixed polyester fiber and a fine denier single fiber were used as short polyester fibers, and spun yarns were obtained through the same process, and woven and knitted fabrics were knitted with 1ia.
The woven material was evaluated. The results are shown in Table 1. Also, for comparison, the configurations of No. 1, No. 2, and the spacing are used. The fibers were mixed and fed to a normal mixed batting process in the same configuration as No. 9.10) and No. 2 (2) to obtain spun yarns () in the same manner as No. 10) No. 1+ 2, and evaluated.

The evaluation results are also shown in Table 1.

In addition, in Table 1, as a substitute characteristic for 2 repulsion: I) B
S, BR are values indicating BS-average bending hardness, BR=bending repulsion rate, JIS+,! 098 6,2D3. C method (
Obtain it by measuring it using the loop compression method.

0% in the yarn quality column, NEP is made by measuring instrument varnish ■ KETB
OB type yarn unevenness prototype machine unevenness tester, yarn defects.

Zellweger Worcester Star Classima 7 pieces! The yarn defects were calculated by icMm and divided into 16 categories and shown as the total number of yarn defects.

As is clear from Table 1, in the examples, the card passability was significantly improved, and good results were obtained in terms of final yarn quality.

On the other hand, ratio! ! In the second example, although it is natural that the passability of the 7 card is poor when the short polyester fibers are used alone (Mo5.7), when polyester short fibers with a thick denier (N o 6+ 8) are mixed. Also, N
When O6 is mixed with other fibers of the same length, the homogeneous mixture of pigeon denier and thick denier is known as Kokuden, and the card passability and thread quality are poor. Even if the fiber length is changed as shown in No.8D, formulas (6) and (7) can be converted to 1R.
If it is not added, the yarn quality will be extremely poor and it will not be accepted.

In the case of No. 9.10, in which polyester short fibers were mixed with each other in the mixing process, the card's hardness and yarn quality were poorer than those of the present invention.

On the other hand, those of Examples M No. 1 to 4 obtained good results with improvements in swelling, which is one of the objectives of the present invention, and resilience.

Furthermore, although the reason for this is not clear, the fabric according to the present invention has significantly improved gloss on its surface and has the quality of a high-class product.

[Brief explanation of the drawing]

Figure 1 shows a cut of the polyester strip 3a) II of the present invention. It is a sectional view showing an example of a mixing process. Yl, Y2: Thick, denier polyester tow Gl, G2: Guide roller TI, T2
: Tension bar CI, C2: Cutting device Nl, N2: Opening pressure air nozzle Sl, S2: Thick! [Denier polyester staple fiber; Cutter chute: Conveyor belt; Compressed air outlet: Conveyor belt W-roller No. 2C! FIG. 1 is a perspective view showing sampling positions in a bale packed with polyester short fibers of the present invention. 5~: Sampling position: Packing bale opening t Procedural amendment 1. Indication of the case, Patent Application No. 2, title of the invention (1) As per appended claims (2) Formula % formula % 2) on page 5, line 12 of the same. (3) “L: Average fiber length of short fibers <
mn+) Delete J. (4) On page 7, line 10, after "...it's not good because it decreases." The ratio of D 1 and D2 is 4.50≧D
The range of 1/D2≧1,25 is preferable. D 1 /
When D2 exceeds 4.50, the fine denier fibers and the thick denier fibers become less compatible and behave separately, making it impossible to obtain the effect of improving spinnability by blending the fibers. Also, 1.25
If it is less than that, the thickness of the fibers on the thick denier side will be insufficient and a sufficient effect will not be obtained. ” he adds. (5) On page 7, line 14, after "...preferable." [On the other hand, the blending ratio M2 of fine denier polyester short fibers is 95≧M2≧35 from M2=100-Ml, which is a more preferable range. Therefore, 90≧M2≧60. ”
Add. (6) On page 11, line 6, ``on the contrary, if the number of crimps exceeds 15'' is corrected to ``on the contrary, if the number of crimps exceeds 17''. (7) In the 6th line of page 12, "The denier D and the fiber length satisfy the formula (6)" should be corrected to "The denier D1 and the fiber length L+ satisfy the formula (6)." (8) “L is 32.4≧L≧1” on page 12, line 13.
'L2 is used for those between 4 and 08, 32.44≧
Use the one between L2≧14.08.'' (9) Table 1 on page 16 of the same page is corrected as follows. (10) Figure 1 of the drawing will be corrected as shown in the attached sheet. (Attachment) Claims Two or more types of polyester staple fibers are mixed in the packaging bale that is transferred from the polyester staple fiber manufacturing process to the spinning process, and each staple fiber satisfies the following formula: Polyester staple fiber for spinning. 4.50≧Di/D2≧1.25...
(11,8≧D1≧1.0...
(21,0>D2≧0.4...
(365≧M1≧5...(4
95≧M2≧35...(5
16,1Di +26≧Li≧10.2Di +10
(i = 1.2) 44≧L1≧1.13L 2 However, Dl: Fineness of thick denier short fibers D2: Fineness of fine denier short fibers Ml: Mixing ratio of thick denier short fibers M2: Mixing ratio of fine denier short fibers (de ) [de) (wt%) (wt%) Ll: Average fiber length of thick denier staple fibers (mm) L2: Average fiber length of fine denier staple fibers (mm) Figure 1

Claims (1)

[Claims] Spinning characterized in that two or more types of short polyester fibers are mixed in a packaging bale that is transferred from the polyester short fiber manufacturing process to the spinning process, and each short fiber satisfies the following formula: Polyester short fiber for use. 4.50≧D1/D2≧1.25……(1) 1.8≧D1≧1.0……………………(2) 1.0>D2≧0.4…… …………(3) 65≧M1≧5………………………………(4) 95≧M2≧35………………………………(5) 16.1D+26≧L≧ 10.2D+10………………(
6) 44≧L1≧1.13L2………………(7) However, D1: Fineness of thick denier short fibers (de) D2: Fineness of fine denier short fibers (de) M1: Mixing ratio of thick denier short fibers ( (wt%) M2: Blend ratio of fine denier short fibers (wt%) L: Average fiber length of short fibers (mm) L1: Average fiber length of thick denier short fibers (〃) L2: Average fiber length of fine denier short fibers ( 〃)