JPS607724B2 - Polyester composite fiber and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyester composite fiber and a method for producing the same.

Although polyester fibers are widely used industrially, ``Currently, in production, for the purpose of labor saving, cost reduction, and resource saving, there is a need for direct transportation such as direct transportation, straight grading, large size, and continuous production. On the one hand, on the other hand, in terms of usage, a wide variety of attempts are being made to differentiate products with the aim of increasing added value.

As the number of brands increases, the types of chips and the number of chip storage tanks increase, piping equipment becomes more complex, chip switching becomes more complicated and losses increase due to brand switching, and manufacturing becomes larger and more continuous. Unable to take advantage of the above economies of scale.

Polyester composite fibers are used for a wide variety of purposes, including stuffing, carpets, and clothing, and the production volume is increasing year by year. Currently, polyester composite fibers are produced by using polyester with a normal degree of polymerization on one side and polyester with a relatively low degree of polymerization on the other side for the side/side or cis core. The uses of polyester composite fibers vary depending on the single yarn denier, and those with a fine denier up to the single yarn denier are mainly used for wool blends or 100% polyester for clothing, while the single yarn denier is used as stuffing for comforters, quilting, etc. It is used for bedding, and large deniers of IM or higher are used for bedding, carpets, etc.

On the other hand, the degree of appearance of three-dimensional crimp in polyester composite fibers varies depending on the denier of the single filament, and as the denier increases, it is necessary to increase the difference in the degree of polymerization of each polyester.

For example, in order to obtain the same number of crimp, the difference in intrinsic viscosity is around 0.0$ for a single yarn with uneven weave, and 0.1 for a first yarn.
．． Around 15 is preferable. For such a wide variety of uses,
It is necessary to polymerize polyester of various degrees of polymerization in a batch method, turn it into chips, and store it in several storage tanks.Furthermore, in textile production, piping becomes complicated and chip replacement is complicated when changing brands, which reduces waste. The amount increases. In terms of quality, variation in the degree of polymerization between batches causes variation in the appearance of crimp.

The present inventors have overcome the above-mentioned problems and developed differentiated products of conjugate fibers that have manufacturing characteristics such as continuous and large size, and which are becoming finer and more individualized for an increasingly wide variety of applications. The present invention was completed as a result of intensive research to provide a uniform, low-cost, and easy-to-use product.

In the present invention, the general formula (
However, R,, R3 are the same or different alkyl groups or phenyl groups, R2 is a residue of an aliphatic or aromatic compound, and n
represents an integer of 1 or more) and 0.02 to 1 parts by weight of glycols, and the total amount of the polyol and glycols is 0. .2/8 to 8/2 (weight ratio) of the polyester composition (B component) containing 1 to 15 parts by weight.
The method of the present invention is a polyester composite fiber made by eccentrically joining the cross-sections of two types of polyesters. For 100 parts by weight, the general formula (
However, R,, R3 are the same or different alkyl groups or phenyl groups, R2 is a residue of an aliphatic or aromatic compound, and n
represents an integer of 1 or more), 0.02 to 12 parts by weight of glycols, and 0.02 to 12 parts by weight of glycols, and the total amount of the polyol and glycols is 0.02 to 12 parts by weight. It is characterized in that a polyester composition (component B) containing 1 to 15 parts by weight is joined at a ratio of 2/8 to 8/2 (weight ratio) in a sectional manner.

The polyester applied to the present invention is composed of at least 85% by weight of polyethylene terephthalate,
Finphthalic acid as a dicarboxylic acid other than terephthalic acid,
Aromatic dicarboxylic acids such as naphthalene dicarboxylic acid, aliphatic dicarboxylic acids such as oxalic acid, succinic acid, glutaric acid, adipic acid, azelaic acid, and sebacic acid, and glycols other than polyethylene glycol such as diethylene glycol, triethylene glycol, One or more types of polyethylene glycol, propylene glycol, polypropylene glycol, tetramethylene glycol, bentamethylene glycol, neobentyl glycol, hexamethylene glycol, etc. may be copolymerized, but polyethylene terephthalate is particularly preferred. be.

The polyester used in the present invention is so-called "fiber grade" and usually has a number average molecular weight of 18,000 to 22,000.

The polyol applicable to the present invention is represented by the above general formula.

In this), R, and R3 are the same or different alkyl groups or phenyl groups, and the alkyl group has a straight chain or a side chain and usually has 1 to 10 carbon atoms, and the phenyl group has 1 to 10 carbon atoms. It also includes those having an alkyl substituent, of which a butylphenyl group is particularly preferred. Further, it is particularly preferable that R and R2 are the same. R2 is a residue of an aliphatic or aromatic compound, particularly preferred.

Further, n is 1 to 8, particularly preferably 1 to 6. The polyol is specifically produced by linking at least one diglycidyl ether of an aliphatic diol or an aromatic bishydroxy derivative with at least one monofunctional compound.

Examples of the aliphatic diol include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, tetramethylene glycol, polytetramethylene glycol, bentamethylene glycol, neobentyl glycol, hexamethylene glycol, decamethylene glycol, and the like. Examples of aromatic pis-hydroxy derivatives include bisphenol A, bisphenol F, bisphenol S, brominated bisphenols, bisphenols with ethylene oxide and propylene oxide added, bis(8-hydroxy (ethyl) isophthalate, etc.

Examples of the monofunctional compound include alcohols such as methyl alcohol, ethyl alcohol, amino alcohol, and benzyl alcohol, or phenol, 2
-Methylphenol, 3-melphenol, 4-methylphenol, 2,3-dimethylphenol, 214-dimethylphenol, 2,6-dimethylphenol, 3.
4-dimethylphenol, 3,5-dimethylphenol, 2-ethylphenol, 3-ethylphenol, 4-
Ethylphenol, 2-propylphenol, 3-phenol.

Lopylphenol, 4-propylphenol, 2-te
rt-butylphenol, 3-rt-butylphenol, 4-te-butylphenol, 2-sec butylphenol, 4-sec butylphenol, 2-n butylphenol, 3-n-phthylphenol, 4-n Butylphenol, 4-methyl-2-te-butylphenol, 4-t-amylphenol, 4-n-amylphenol, 4-methyl-2-te-amylphenol, 2.5-dimethyl-4-ten- butylphenol, 4
- Ethyl - 2 batches of rt-butylphenol, 2,6-di-rt-butylphenol, 4-diisobutylphenol, 3-methyl-4,6-te ratio butylphenol, 3-methyl-4-diisobutylphenol, 2,3-dimethyl -416-G-tertphenol, 3-ethyl-4
・6-dibutylphenol, 4-methyl-2・
Examples include alkylphenols such as 6-di-ten-amylphenol and 2,4,6-tri-ten-butylphenol, particularly ten-butylphenol, SeC
-phenol and n-butylphenol are preferred. Glycols to be added to polyester together with polyols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, bentamethylene glycol, neobentyl glycol, hexamethylene glycol, decamethylene glycol, and bis(3).
Examples include bis(B-hydroxyethyl) terephthalate, bis(B-hydroxyethyl) isophthalate, and adducts of bisphenol A with ethylene oxide or propylene oxide, with bis(8-hydroxyethyl) terephthalate being particularly preferred.

Polyol: 0.02 parts by weight per 100 parts by weight of polyester
~12 parts by weight, preferably 0.1 to 8 parts by weight, especially 0.1 to 8 parts by weight.
Contains 2 to 6 parts by weight, glycol is polyester 100
0.02 to la parts by weight, preferably 0.1 parts by weight
~8 parts by weight, especially 0.2 to 6 parts by weight, but the total amount of polyol and glycol is 0.1 to 15 parts by weight, preferably 0.5 to 10 parts by weight, especially It is 1 to 8 parts by weight.

If the amount of polyol and glycol is less than the above range, there will be no anti-pilling effect, and if it exceeds it, single yarn breakage will occur frequently during grade yarn, and roller wrapping will occur during yarn drawing, making it impossible to operate. Must be avoided. In addition, in the present invention, commercially available pigments, matting agents, gloss imparting agents, foaming agents, flame retardants, conductivity imparting agents, etc. are added to the polyester as component A or the mixture of polyols and glycols as component B and polyester. It is also possible to add. As a method for adding polyols, glycols, and their functional derivatives to the polyester of component B, for example, mixing using a static mixer when making chips, or mixing in a chip state is also possible. Although it is possible, in that case, the complexity of chip storage and the complexity of the process due to multi-brand products cannot be avoided, and the advantages of the present invention are impaired, so it is added to one side of the polyester during spinning. As for the polyol addition position for paper yarn, a meeting part is provided in the polyester having a normal degree of polymerization at the outlet of the polymer inlet tube, and the polyol measured by a plunger pump or gap pump is added from an injection nozzle.

The polymer flow path after the meeting section is set in the order of, for example, the first kneading section - gap pump - second mixing section - spin beam (third kneading section) - spinning back, so as to increase the permissible customer pressure loss in the kneading section as much as possible. , it is possible to increase the number of known stationary crosstalk elements to achieve a concentration effect.

The static moat element was a static mixer (manufactured by Koenix Co., Ltd.), a ROSS-G mixer (manufactured by Tokushu Kikako Co., Ltd.), and a ROSS-LPD mixer (manufactured by Tokushu Kikako Co., Ltd.).

There are SM mixers (manufactured by Pulsar), BKM mixers (manufactured by Pulsar), etc. The meeting part, the first crosstalk part, and the gap pump can be incorporated into the wear plate for connecting the gap pump, thereby increasing the accuracy of measuring the additive and making the device more compact.

The flow path is branched into two parallel sets before the meeting part, each set is provided with a meeting part, a first mixing part, a gap pump, and a second bran mixing part, and the outlet of the second kneading part is a paper yarn bag having two inlets. A polyester composite fiber is spun by adding polyol only to a single joint. During spinning, component A and component B are mixed eccentrically in cross section and 2/8 to 8/2 (weight ratio), preferably 3/7 to 7/3 (weight ratio), particularly preferably 4
/6 to 6/4 (weight ratio).

The A component and the B component can be joined in a core-sheath shape either eccentrically or in parallel, but parallel is preferred from the viewpoint of crimpability. Junction ratio is 2/8~
If the ratio is outside the range of 8/2 (weight ratio), sufficient crimp cannot be obtained, and moreover, a composite polyester fiber of uniform quality and good quality cannot be obtained. The shape of the yarn cap may be circular or of any irregular shape, or it may be of any shape, for example, one with parallel slits, for weaving hollow fibers.

The polyester conjugate fiber of the present invention has excellent winding properties and can be more easily spun into polyester conjugate fibers of multiple brands than polyester having a normal degree of polymerization.

The present invention will be explained below with reference to Examples.

Example 1 Number average molecular weight at the outlet of the polymer introduction tube at 280:00:210
For polyethylene terephthalate of 0.00, a polymer flow path is provided in the order of a meeting part, a first moat part, a gap, and a second kneading part which are branched into two sets, and the second kneading part is a spinning bag having two inlets. A polyol (number average molecular weight 1580
, n=5, hydroxyl group equivalent 0.298ta equivalent/1009re
Sin) and pis(8-hydroxyethyl) terephthalate were mixed at different ratios, weighed to give a total of 9.3#'min to the polyester, and added through a 1.0 leg nozzle.

The total polyester flow rate was 530 tamin. Therefore, the amount of the mixture of polyol and glycol added to one side of the polyester is 3.5% (by weight).

Nothing was added to the other meeting areas. In addition, in order to mix and disperse the modified polyester, the first and second kneading sections were equipped with 12 elements of Nutate mixer (manufactured by Koenix Co., Ltd.) with an inner diameter of 25 ribs and L/D = 1.5, and an inner diameter of 1.
6.2 skin, length 23 willow BKM mixer (manufactured by Zurser) 2 elements are used, and BK in the spin beam is used.
M mixer (manufactured by Sulther) S element was used.
Using a 240-day hollow side no-side nozzle with a grade yarn bag, a splicing ratio of 1:1 and a winding speed of 780 skins/min were produced. The obtained partially drawn yarn was drawn and heat treated to obtain the results shown in Table 1. The single yarn denier of each drawn yarn was 7.3.
Table 1 Example 2 A polyol (number average molecular weight 640, n: 1, hydroxyl group equivalent 0.310 ta equivalent A mixture of 4 parts bis(3-hydroxyethyl) terephthalate to 100 parts (6 parts resin) was added to polyethylene terephthalate having a number average molecular weight of 21,000 at a rate of 615 parts/min in a range of 0 to 20%.

The clasp uses 13 groups of hollow side-by-side type,
Weaving was carried out at a joining ratio of 1:1 and a winding speed of 700 min, and the results shown in Table 2 were obtained. On one side of the second table, if the amount of polyol and glycol added to the polyester exceeds 15% (by weight), doglegs occur during paper output, and the paper fuses to the nozzle, making spinning impossible.

15% by reducing the bonding ratio on the additive side.
Although it is possible to produce paper even if the weight exceeds 100%, it is impossible to actually use it because of the frequent rolling of rollers during stretching.

Example 3 Flow rate of polyethylene terephthalate is 390 m/min
The results shown in Table 3 were obtained by changing the amount of the mixture added in the same manner as in Example 2, except that the nozzle was a hollow side-by-side type, 40 ke, the joining ratio was 1:1, and the winding speed was 850 min. Ta.

Table 3 Example 4 Number average molecular weight at the outlet of the 280q0 polymer inlet tube: 210
Polyol 3 of Example 1, polyol 3 of Example 2, and diol (number average molecular weight 640 hydroxyl equivalent 0.33 ta equivalent/100 ta resin) 4 ratio mixture to polyester 2.7
(component B) at a ratio of 1/min (component B), and the bonding ratio A:B=
A core-sheath eccentric type conjugate fiber with a ratio of 6:4 was drawn and heat-treated to obtain the results shown in Table 4.

Table 4

Claims (1)

[Claims] 1. There are general formulas ▲ mathematical formulas, chemical formulas, tables, etc. ▼ for polyester (component A) mainly composed of polyethylene terephthalate and 100 parts by weight of polyester mainly composed of polyethylene terephthalate (However, R_1, R_3 is the same or different alkyl group or phenyl group, R_2 is a residue of an aliphatic or aromatic compound, and n is an integer of 1 or more.
12 parts by weight, and 0.02 to 12 parts by weight of glycols, and the total amount of the polyol and the glycols is 0.
．． A polyester composite fiber obtained by eccentrically joining a cross section of 1 to 15 parts by weight of a polyester composition (component B) at a ratio of 2/8 to 8/2 (weight ratio). 2. The fiber according to claim 1, wherein the polyesters of component A and component B are polyethylene terephthalate. 3. The fiber according to claim 1, wherein R_1 and/or R_3 of the polyol is an alkylphenol. 4
The fiber according to claim 1, wherein R_2 of the polyol is ▲Numerical formula, chemical formula, table, etc.▼, and n is an integer from 1 to 8. 5. The fiber according to claim 1, wherein the polyol has a numerical formula, chemical formula, table, etc.▼. 6. The fiber according to claim 1, which contains 0.1 to 8 parts by weight of polyol. 7. The fiber according to claim 1, wherein the glycol is bis(β-hydroxyethyl) terephthalate. 8. The fiber according to claim 1, which contains 0.1 to 8 parts by weight of glycols. 9 When composite spinning two types of polyesters, the general formula ▲ mathematical formula, chemical formula,
There are tables, etc. ▼ (However, R_1 and R_3 are the same or different alkyl groups or phenyl groups, R_2 is the residue of an aliphatic or aromatic compound, and n is an integer of 1 or more.) At least one species from 0.02
12 parts by weight and 0.02 to 12 parts by weight of glycols,
And the total amount of the polyol and the glycols is 0.
Polyester composition containing 1 to 15 parts by weight (component B)
A method for producing a composite polyester fiber, which comprises eccentrically joining the cross sections of the fibers at a ratio of 2/8 to 8/2 (weight ratio). 10. The method according to claim 9, wherein the polyesters of component A and component B are polyethylene terephthalate. 11. The method according to claim 9, wherein R_1 and/or R_3 of the polyol is an alkylphenol, R_3 is ▲a numerical formula, a chemical formula, a table, etc.▼, and n is an integer from 1 to 8. 12. The method according to claim 9, wherein 0.1 to 8 parts by weight of polyol and 0.1 to 8 parts by weight of glycol are blended. 13. The method according to claim 9, wherein the blending is carried out by rapid kneading using a static kneading element.