JPS62199817A - Polyester conjugated yarn and production thereof - Google Patents

Abstract

PURPOSE:To obtain the titled yarn useful for carpets, etc., having high elongation, improved pilling resistance and crimping properties without changing existing facilitates, by bonding two polyesters having different intrinsic viscosity into a parallel type or an eccentric sheath-core type, spinning and drawing. CONSTITUTION:(A) A polyester having >=0.40 intrinsic viscosity [eta] obtained by blending 100pts.wt. polyester consisting essentially of polyethylene terephthalate with 0.02-12pts.wt. polyol shown by formula (R1 and R3 are alkyl or phenyl; R2 is alkylene or phenylene; n is >=1 integer) and 0.04-12pts.wt. glycol and (B) a polyester having intrinsic viscosity [eta] which is 0.005-0.10 larger than that of the component A and is <=0.50, comprising 100pts.wt. polyester consisting essentially of polyethylene terephthalate and the polyol shown by the formula and the glycol in total amounts to give >=0.04pts.wt. smaller than those of the component A are bonded into a parallel type or an eccentric sheath-core type and spun to give the aimed conjugated yarn having 60-120% elongation.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a polyester woven pongee and a tearing method thereof, and more specifically, a high elongation polyester composite with excellent anti-pilling and crimp properties. It is related to fibers.

(Prior Art) Polyester composite fibers are used for a wide variety of purposes, such as stuffing lines, carpets, and clothing, and their production 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 in a side-by-side or cis-core manner.

The uses of polyester composite fibers vary depending on the single yarn denier. Single yarns with a denier of up to 3 d are mainly used for wool blends or 100% polyester for clothing, while single yarns of 6 df 1 degree are used for stuffing such as kefton or quilting. Cotton can be used as bedding, and thick denier of 10 d or more can be used as a mattress.
They are used for carpets, etc.

On the other hand, the degree of development of three-dimensional crimp in polyester condensed fibers varies depending on the single yarn denier, 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 0.03 for single yarn fineness of 3d, around 0.10 for 6d, and 15
d is preferably around 0.15.

A polyester composite fiber made by joining two types of polyesters having different intrinsic viscosities is described in JP-A-49-54625. In addition, polyester composite fibers with polyol or glycol added to one component were published in the Special Publication in 1988-1977.
It is described in Publication No. 24. On the other hand, if the difference in intrinsic viscosity is 0
．． JP-A-54-15068 describes a stretchable fabric having a stretch rate of 15 to 45% and using a filament yarn made by joining two types of polyesters, 18 to 18 o and ai.

(1 point while the invention is trying to solve) These combinations! For example, a-fiber is not only complicated to manufacture because it requires the production of two types of polyester with completely different compositions, but also has disadvantages such as irritation when used as a final product such as textiles because the two components have different dyeability. arise.

Moreover, a composite fiber containing polyol and glycol as one component has insufficient anti-pilling properties. Further, if the viscosity difference is 0.18 or more, the spinnability is extremely poor, and in the case of a fine single yarn denier of 2 to 8, it is almost impossible.

The present inventors completed the present invention as a result of research in order to eliminate such conventional defects and develop a polyester composite fiber with excellent performance. That is, an object of the present invention is to provide a polyester composite fiber having high elongation and excellent anti-pilling and crimp properties, and another object of the present invention is to provide a polyester composite fiber having high elongation and excellent anti-pilling and crimp properties. Polyester composite #a with excellent properties
The object of the present invention is to provide a method for industrially and easily producing fibers.

(Means for Solving the Problems) The present invention uses a polyester A component having an intrinsic viscosity [η] of at least 0.40, and a polyester A component having an intrinsic viscosity [η] of 0.40.
．． 005 to 0.10 and a polyester B component of 0.50 or less are joined in a parallel type or eccentric core-sheath type,
The method of the present invention relates to polyester composite fibers with an elongation of 60 to 120% and excellent anti-pilling and crimp properties, and the method of the present invention involves the following steps when composite spinning two types of polyesters:
Polyester A having an intrinsic viscosity [η] of at least 0.40
component, and the intrinsic viscosity [η] is 0.005 higher than that of the component A.
It is characterized in that a polyester B component having a size of ~0.10 and 0.50 or less is joined and spun into a parallel type or eccentric core-sheath type in cross section, and then stretched.

The polyester used as the polyester A component and the B component of the present invention has at least 85% by weight of polyethylene terephthalate, and dicarboxylic acids other than terephthalic acid include aromatic dicarboxylic acids such as isophthalic acid and naphthalene dicarboxylic acid, oxalic acid, Amber age, glutaric acid, aliphatic dicarboxylic acids such as adipic acid, azelaic acid, sebacic acid, and glycols other than ethylene glycol such as diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, tetramethylene glycol, pentamethylene glycol.

One or more types of neopentyl glycol, hexamethylene glycol, etc. may be copolymerized, but polyethylene terephthalate is suitable for samurai.

The intrinsic viscosity [η] of each polyester is at least 0.40 for the A component and 0.50 or less for the B component, and the A component has an intrinsic viscosity of 0.005 to 0.10. Preferably 0. O2N2.07 is low.

As a suitable method for preparing polyesters having different viscosities, it is advantageous to use polymers taken out before and after the final step, usually called a finisher, of the polycondensation step of polyethylene terephthalate, since a single step is required.

Furthermore, the following polyols and glycols may be added to each polymer, or they may be added to one or both of the same polymers.

A polyol represented by formula (1) that plays a role in both the polyester component and the B component or only the A component, which is applied to the present invention,
and glycols can be added.

The polyol applicable to the present invention is represented by the following formula: f+tf. Here, R1 and Ra 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.
The phenyl group also includes those having an alkyl substituent having 1 to 10 carbon atoms, and a butylphenyl group is particularly preferred.

It is particularly preferable that It and R2 are the same. R2 is aliphatic or aromatic. Further, n is 1 to 8, particularly preferably 1 to 6.

The polyol is specifically prepared by ring-opening at least one diglycidyl ether of an aliphatic diol or an aromatic bishydroxyl diol with at least one monofunctional compound.

The aliphatic diols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, tetramethylene glycol, and polytetramethylene glycol.

pentamethylene glycol, neopentyl glycol,
Hexamethylene glycol, decamethylene glycol, etc. are mentioned, and aromatic bishydroxy derivatives include bisphenol, bisphenol r, bisphenol S
, brominated bisphenols, bisphenols added with ethylene oxide and/or propylene oxide, and bis(β-hydroxyethyl) isophthalate.

Examples of the monofunctional compound include alcohols such as methyl alcohol, ethyl alcohol, amino alcohol, and benzyl alcohol, or phenol, 2
-Methylphenol, 8-methylphenol, 4-methylphenol, 2,8-dimethylphenol, 2.4-
Dimethylphenol, 2,6-dimethylphenol, 8
．． 4-dimethylphenol, 3.5-dimethylphenol, 2-ethylphenol, 3-ethylphenol, 4
-Ethylphenol, 2-propylphenol, 3-propylphenol, 4-propylphenol.

2-tert-butylphenol, a-tert-butylphenol, 4-tert-butylphenol, 2-tert-butylphenol
BeO-butylphenol, 4-880-butylphenol, 2-n-butylphenol, 3-n-butylphenol, 4-n-butylphenol, 4-methyl-2-
tert-butylphenol, 4-tert-amylphenol, 4-n-amylphenol, 4-methyl-2
-tert-amylphenol.

2.5-dimethyl-4-tert-butylphenol.

4-ethyl-2-tert-butylphenol, 2.6
-tert-butylphenol, 4-diisobutylphenol, 8-methyl-4,6-tert-butylphenol, 8-methyl-4-diisobutylphenol, 2,3-dimethyl-4,6-ditert-phenol, 3- Examples include alkylphenols such as ethyl-4,6-tert-butylphenol, 4-methyl-2,6-tert-amylphenol, and 2,4.6-tri-tert-butylphenol;
art-butylphenol, 5ea-phenol tn
-Butylphenol is preferred.

Glycols added to polyester along with polyols include ethylene glycol, diethylene glycol,
Triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, pentamethylene glycol, neopentyl glycol, hexamethylene glycol, decamethylene glycol, bis(β-hydroxyethyl) terephthalate, bis(β-
Hydroxyethyl) isophthalate, bisphenol adducts of ethylene oxide or propylene oxide, etc. are preferred, but bis(β-hydroxyethyl) terephthalate is particularly preferred.

Polyol in polyester A component is polyester 10
0.02 to 12 parts by weight, preferably 0.02 to 12 parts by weight.
1 to 8 parts by weight, especially 0.2 to 6 parts by weight, and glycol is 0.04 to 12 parts by weight per 100 parts by weight of polyester, preferably 0.1 to 8'rx4 parts, especially 0. .2～
The total amount of polyol and glycol is 0.06 to 15.6 parts per 100 parts by weight of polyester. !
ft part 1 preferably 0.5 to 10 fl [parts, especially 1 to 10 fl [parts]
It is 8 parts by weight.

The total amount of cough polyol and glycol in the polyester B component is 0.04f compared to the A component.
Reduce by more than fiffi parts.

In addition, in the present invention, commercially available head additives, matting agents, gloss imparting agents, and foaming agents are added to the polyester A component and B component.

It is also possible to add flame retardants, conductivity imparting agents, and the like.

Methods for adding polyols, glycols, and their functional derivatives to the polyester of component A or both components A and B include, for example, mixing using a static mixer in step 1 of chipping, or stirring and mixing in chip form. However, it is possible to avoid the complexity of chip storage and the complexity of the process due to the multi-way pattern products; Good.

As the positive silane to be added during spinning, a meeting part is provided in the polyester at the outlet of the polymer introduction tube, and polyol and glycol metered by a plunger pump or gear pump are added from an injection nozzle.

The polymer flow path after the meeting part is arranged in the order of, for example, the first mixing part - the second kneading part of Gaponboo - the spin beam (eighth kneading part) - the spinning pack, and the allowable pressure loss in the mixing part is made as large as possible before use. The kneading effect can be increased by increasing the number of known static crosstalk elements.

Static crosstalk elements include static mixers (Koenix Corporation!!), RO8S-LSG mixer (manufactured by Tokushu Kikako Co., Ltd.), RO8S-LPD mixer (manufactured by Tokushu Kikako Co., Ltd.), 8 M'i, and Kisser (manufactured by Brusar Co., Ltd.). .

Examples include BKMt Kisser (manufactured by Zulsar).

The meeting section, the first kneading section, and the gear pump can be incorporated into a wear plate for connecting the gear 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 point, and each set has a meeting point and
A first kneading section, a gear pump, and a second mixing section are provided, the outlet of the second a line section is joined to a spinning pack having two inlets, polyol and glycol are added to the meeting section, and polyester composite fibers are spun.

During spinning, the A component and B component are taffred eccentrically and at a ratio of 2/8 to 8/2 (weight ratio), preferably 3/7 to 7/2.
8 (1 ratio), preferably 4/6 to 6/41 tff for samurai
1 ratio). The A component and the B component can be joined eccentrically or in parallel in a core-sheath shape, but from the viewpoint of crimpability, parallel is preferred. If the bonding ratio is outside the range of 2/8 to &/2 (!ffi ratio), sufficient fM and iM cannot be obtained, and moreover, a composite polyester fiber of uniform quality and good quality cannot be obtained.

The shape of the spinneret may be circular or irregularly shaped, or a spinneret with parallel slits for spinning hollow fibers may be used.

The spun fibers are drawn in a conventional manner. Of course, it may be directly stretched, or it may be separately drawn four times after spinning.

(Effects of the invention) The polyester composite fiber of the present invention has a high elongation in the range of 60 to 120%, and has excellent anti-build properties and crimp properties.
Not only thread, but also wool and silk.

It can be blended with natural fibers such as cotton. Further, the polyester composite fiber of the present invention is industrially advantageous because it can be easily produced without changing conventional equipment.

(Example) The intrinsic viscosity was determined at 20° by dissolving polyester in a composite solvent consisting of 60:40 phenol and tetrachloroethane.
This is the value measured using an automatic viscometer.

In addition, the number of bending fatigue cuts was measured by the following method.

Applying a load of 1/8 f/a to the drawn yarn on a piano wire of 0.1 mmφ tensed under a load of 800 f,
The number of bending fatigue cuts was measured at a contact angle of 10 degrees and a thin width of 15 degrees.

There is a relationship between the building resistance and the number of bending fatigue cuts, and good pill resistance means that the number of bending fatigue cuts is 900 or less.

Example 1 Number average molecular weight at the outlet of the polymer inlet tube at 200°C: 210
00 polyethylene terephthalate, a polymer flow path is provided in the order of a meeting part, a first mixing part, a gear pump, and a second kneading part branched into two sets, and the second kneading part has two inlets. The polyol (number average molecular ff11
580. n=5, i0.298g/ft/1 per hydroxyl group
00 tjresin) and his(β-hydroxyethyl) terephthalate at a ratio of 30/70, 1.5% (by weight) based on the polyester was weighed, and added through a 1.0 mm nozzle.

To the other meeting area, 2.4% (by weight) of the above additive (a) based on the polyester was added through a nozzle.

Polymer B's [η] was 0.45, Polymer B's [η] was 0.48, and Δ[η] was O, Oa.

In order to mix and disperse the additive into the polyester, the first step is to mix and disperse the additive into the polyester.
In the second crosstalk section, there are 12 static mixer elements (Koenix fi) each with an inner diameter of 25 mm and L/D = 1.5, and a B with an inner diameter of 16.2 mm and a length of 23 mm.
Using KM mixer (manufactured by Zulther) 2 elements,
Furthermore, a 5-element BKM mixer (manufactured by Sulther) was used in the spin beam.

Using a side-by-side nozzle with a spinning pack, the splicing ratio is 1.
: Spinning was performed by changing the discharge amount and spinning speed at 1. The obtained undrawn yarn was drawn and heat treated to obtain the results shown in Table 1. The single yarn denier of each drawn yarn was 3.0.

Table 1: If the elongation was less than 80%, crimp development was too strong, and during spinning, the top neps occurred and spun yarn broke frequently, making it unusable.

Moreover, when the elongation exceeds 120%, it becomes impossible to control the number of crimp, and fusion occurs during stretching, making it impossible to obtain a satisfactory fiber. The anti-pilling properties were also poor due to the high number of bending fatigue cuts.

Example 2 Polyethylene terephthalate (intrinsic viscosity [η) 0.46) at the outlet of the polymer inlet pipe at 280°C was treated with polymer flow in the following order: a meeting part branched into two sets, a first mixing part, a gear pump, and a second kneading part. A polyol (number average molecular H1580
, n=5, hydroxyl group nO, 298f t'J/ 100
f resin) and bis(β-hydroxyethyl) terephthalate were mixed at a ratio of 80/20 and added to the polyester at different addition rates through a 2.0 mm nozzle.

Nothing was added to the other meeting areas.

In addition, in order to mix and disperse the modified polyester,
te 25mm inner diameter for each second crosstalk section.

Static mixer (manufactured by Koenix) with L/D = 1.5, 12 elements, and inner diameter le, 2 mm.

B K M mixer with a length of 23 mm (manufactured by Sulther)
2 elements and even within the spin beam B K
A 5-element M mixer (manufactured by Sulther) was used. Spinning was carried out using a side-by-side nozzle in a spinning pack at a splicing ratio of 1:1. The obtained undrawn yarn was drawn and heat treated to obtain the results shown in Table 2. The single yarn denier of each drawn yarn was 2d.

Below, if [η] of the margin polyester B side is less than 0.40, frequent yarn breakage and dripping occur during spinning, and undrawn yarn cannot be obtained.

When Δ[η] is less than 0.005, the conjugate crimp is insufficiently expressed.

Example 8 Number average molecular weight at the outlet of the polymer inlet tube at 280°C: 21.
000 polyethylene terephthalate with 6 parts of the polyol of Example 1 and a diol (number average molecule 1 ik 640, hydroxyl equivalent 0.
A mixture of 4 parts (88f/100j Fresin) was added to polyester, a core/sheath eccentric type composite fiber was spun at a joining ratio of A:B=6:4, and the 8th
Obtained the results in the table. The single yarn denier after drawing is 8. Od
Met.

When [η] of polyester A exceeds 0.50, anti-pilling properties become poor.

Also, if Δ[η] exceeds 0.10, there will be drips during spinning.

Bending and kneeling are so severe that spinning operation becomes impossible.

Applicant: Nihon Ester Co., Ltd. ,i! I: υ・,・°1

Claims (1)

[Scope of Claims] (1) A polyester component A having an intrinsic viscosity [η] of at least 0.40, and a polyester component A having an intrinsic viscosity [η] of at least 0.40.
005 to 0.10 and a polyester B component of 0.50 or less joined in a parallel type or eccentric core-sheath type, 6
A polyester composite fiber with excellent anti-pilling and crimp properties and an elongation of 0 to 120%. (2) The fiber according to claim 1, wherein the polyester constituting the polyester A component and the polyester B component is polyethylene terephthalate. (3) For 100 parts by weight of polyester whose polyester A component is mainly polyethylene terephthalate, general formula (1) ▲There are numerical formulas, chemical formulas, tables, etc.▼・・・・・・(1) (However, R_1, R_3 are the same or different alkyl groups or phenyl groups, R_2 is a residue of an aliphatic or aromatic compound, and n is an integer of 1 or more) 0.02 to 12 parts by weight of at least one polyol represented by and glycols from 0.04 to
The fiber according to claim 1, which contains 12 parts by weight of the polyol and 0.06 to 15 parts by weight of the polyol and the glycol. (4) The polyester B component contains at least one polyol represented by the general formula (1) and glycols in a total amount of 0.04 parts by weight relative to the total amount of the polyester A component, based on 100 parts by weight of a polyester mainly composed of polyethylene terephthalate. The fiber according to claim 1, which contains less than or equal to parts by weight. (5) The fiber according to claim 1, wherein R_1 and/or R_3 of the polyol is an alkylphenol. (6) The fiber according to claim 1, wherein R_2 of the polyol is a numerical formula, a chemical formula, a table, etc., and n is an integer from 1 to 8. (7) The fiber according to claim 1, wherein the polyol has a numerical formula, chemical formula, table, etc.▼. (8) The fiber according to claim 1, wherein the glycol is bis(β-hydroxyethyl) terephthalate. (9) Polyester A component and polyester B component are 2
The fiber according to claim 1, which is bonded at a weight ratio of /8 to 8/2 (weight ratio). (10) When composite spinning two types of polyesters, a polyester A component having an intrinsic viscosity [η] of at least 0.40, and a polyester A component having an intrinsic viscosity [η] of 0.005 to 0.005 or more than the above A component
0.10 large and 0.50 or less polyester B component is joined and spun into a parallel type or eccentric core-sheath type in cross section, and then stretched, and has an elongation of 60 to 120% and is anti-pilling. and a method for producing a polyester composite fiber with excellent crimpability. (11) The method according to claim 10, wherein the polyester constituting the polyester A component and the polyester B component is polyethylene terephthalate. (12) For 100 parts by weight of polyester whose polyester A component is mainly polyethylene terephthalate, general formula (1) ▲There are numerical formulas, chemical formulas, tables, etc.▼・・・・・・(1) (However, R_1, R_3 are the same or different alkyl groups or phenyl groups, R_2 is a residue of an aliphatic or aromatic compound, and n is an integer of 1 or more) 0.02 to 12 parts by weight of at least one polyol represented by and glycols from 0.04 to
12. The method according to claim 10, wherein the polyol and the glycol are mixed in a total amount of 0.06 to 15 parts by weight. (13) The polyester B component contains at least one polyol represented by the general formula (1) and glycols in a total amount of 0.04 parts by weight relative to the total amount of the polyester A component, based on 100 parts by weight of a polyester mainly composed of polyethylene terephthalate. The method according to claim 10, wherein the content is less than or equal to parts by weight. (14) The method according to claim 10, wherein R_1 and/or R_3 of the polyol is an alkylphenol. (15) The method according to claim 10, wherein R_2 of the polyol is a numerical formula, a chemical formula, a table, etc., and n is an integer from 1 to 8. (16) The method according to claim 10, wherein the polyol has a mathematical formula, chemical formula, table, etc.▼. (17) Glycols are bis(β-hydroxyethyl)
11. The method of claim 10, wherein the terephthalate is terephthalate. (18) The method according to claim 10, wherein the polyester A component and the polyester B component are joined at a weight ratio of 2/8 to 8/2. (19) The method according to claim 10, wherein the polyol and glycol are blended into the polyester component A or both polyester components A and B by rapid kneading using a static kneading element.