JPH0213047B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention uses melt-spun synthetic fiber undrawn yarn.
The present invention relates to a melt-spinning method for solving the problem of steps being formed on the sides of a product package when winding at a high speed of 2500 m/min or more, and for obtaining a product package with a good rolled appearance. In recent years, we have produced 2,500 undrawn melt-spun synthetic fibers.
The so-called high-speed spinning method, which involves winding at m/min or more to obtain product packages, is becoming widely adopted, and the winding speed is showing a tendency to become faster and faster. However, as the winding speed increases, the following drawbacks appear, making winding at a speed of 2500 m/min or more difficult. In other words, if the winding speed exceeds 2500 m/min,
When the rotation of the product is stopped at the end of winding, a so-called "cross-shaped step" occurs on the end surface of the product package, which causes unwinding failure in the subsequent process, leading to yarn breakage. is becoming evident. On the other hand, if you wait for the rotation of the product to stop naturally, you can reduce the "mark" to some extent, but as the winding speed increases, it takes a lot of time to stop the product, making it extremely inefficient. However, it is not suitable for actual production and cannot be adopted. The present inventors have conducted research to solve the above-mentioned drawbacks that occur when winding melt-spun synthetic fiber undrawn yarn at a high speed of 2500 m/min or more. When winding up undrawn synthetic fiber yarn, high _speed The present inventors have discovered that the problem of "marking" can be solved without any quality problems when winding the paper. That is, the present invention uses melt-spun synthetic fiber undrawn yarn to form a dicarboxylic acid, an alkylene glycol, and a water-soluble polyester or dicarboxylic acid consisting of a bifunctional compound having an SO ₃ M group (M represents hydrogen or a metal ion). , an alkylene glycol, a bifunctional compound having an SO ₃ M group (M represents hydrogen or a metal ion), and a polyalkylene glycol, the water-soluble polyester having an intrinsic viscosity (IV) of 0.15 to 0.50. This is a melt spinning method characterized by processing with an aqueous oil solution containing 1 to 10% by weight of the total oil component, and then winding at a speed of 2500 m/min or more without performing fluid entanglement treatment. Synthetic fibers to which the present invention can be applied include all synthetic fibers that can be melt-spun, such as polyester fibers and polyamide fibers, but the effect is particularly remarkable when polyester fibers are used. In addition, the aqueous oil agent used in the present invention is
It means an aqueous solution or water emulsion of any oil commonly known as a textile oil. Examples of the method for applying the aqueous oil agent include a method using a roller and a method using a metering pump. Further, the concentration of the aqueous oil solution and the amount applied to the undrawn synthetic fiber yarn are not particularly limited, but the appropriate concentration is usually about 5 to 20% by weight and the amount applied is about 0.1 to 1.0% by weight. The method of the present invention is characterized by using an aqueous oil solution containing a water-soluble polyester having an SO ₃ M group (M represents hydrogen or a metal ion). Polyesters are dicarboxylic acids, alkylene glycols and
It consists of bifunctional compounds with SO ₃ M groups (M represents hydrogen or metal ions) or dicarboxylic acids, alkylene glycols, SO ₃ M groups (M
represents hydrogen or a metal ion) and polyalkylene glycol. Dicarboxylic acid components are aromatic, aliphatic, and alicyclic dicarboxylic acids, including oxalic acid, malonic acid, dimethylmalonic acid, succinic acid, glutaric acid, adipic acid, trimethyladipic acid, pimelic acid, 2,2
Dimethylglutaric acid, azelaic acid, sebacic acid, fumaric acid, maleic acid, itaconic acid, 1,
3 cyclopentanedicarboxylic acid, 1,2 cyclohexanedicarboxylic acid, 1,3 cyclopentanedicarboxylic acid, 1,4 cyclohexanedicarboxylic acid,
Phthalic acid, terephthalic acid, isophthalic acid,
2,6 norbornanedicarboxylic acid, 1,4 naphthalic acid, diphenic acid, 4,4'oxybenzoic acid,
Examples include diglycolic acid, thiodipropionic acid, 4,4'sulfonyl dibenzoic acid and 2,5 naphthalenedicarboxylic acid, and among these, terephthalic acid and isophthalic acid are preferred. Alkylene glycol components include ethylene glycol, propylene glycol, diethylene glycol, 2,4 dimethyl 2 ethylhexane 1,3 diol, 2 ethyl 2 butyl 1,3 propane diol, 2,2 dimethyl 1,3 propane diol, 2 ethyl 2 isobutyl 1,3 propanediol, 1,3 butanediol, 1,4 butanediol, 1,5 pentanediol, 1,6 hexanediol, 2,2,4 trimethyl 1,6 hexanediol, 1,2 cyclohexanedimethanol,
1,3 cyclohexanedimethanol, 1,4 cyclohexanedimethanol, 2,2,4,4 tetramethyl 1,3 cyclobutanediol, 4,4' thiodiphenol, 4,4' methylene diphenol,
4,4′(2-norbornylidene)diphenol,
4,4' dihydroxybiphenol, o-, m- and p-dihydrohexybenzene, 4,4' isopropylidene diphenol, 4,4 isopropylidene bis(2,6 dichlorophenol), 2,5 naphthalene diol and Examples include p-xylene diol, among which ethylene glycol and diethylene glycol are preferred. Examples of the polyalkylene glycol component include polyethylene glycol, polypropylene glycol, and the like. The role of polyalkylene glycol is to strengthen the bond between the fibers and the water-soluble polyester, and also to provide flexibility to the water-soluble polyester. Examples of the bifunctional compound component having a _-SO3M group (M is hydrogen or a metal ion) include _-SO3M group-containing dicarboxylic acid siol and oxyacid. M is Li ⁺ , Na ⁺ , K ⁺ , Mg ⁺⁺ , Ca ⁺⁺ , Cu ^+
+ , Fe ⁺⁺ , Fe ^+++, etc., with Na ⁺ and Li ⁺ being preferred. As a compound, the −SO ₃ M group is directly connected to an aromatic nucleus, and the general formula is (X is a trivalent aromatic hydrocarbon group, Y is a divalent aromatic hydrocarbon group, R is hydrogen or an alkyl group having 1 to 4 carbon atoms, M is hydrogen, Li ⁺ , Na ⁺ , K ⁺ , Mg ^{+ +} , Ca ⁺⁺ , Fe ⁺⁺
or Fe ⁺⁺⁺ , a is 1, 2 or 3. ) (R is hydrogen, an alkyl group having 1 to 8 carbon atoms or a phenyl group, M is Na ⁺ , Li ⁺ , K ⁺ , Mg ⁺⁺ , Ca ⁺⁺ , Cu ⁺⁺ , Fe ^++
+ or Fe ⁺⁺⁺ , a is 1, 2 or 3. ), specifically metal salts such as sulfoisophthalic acid, sulfoterephthalic acid, sulfophthalic acid or 4-sulfonaphthalene 2,7 dicarboxylic acid, 4-sodiosulfophenyl-3- 5-dicarbomethoxybenzenesulfonate, 4-lithiosulfophenyl 3,5-dicarbomethoxybenzenesulfonate and 6-sodiosulfo-2-naphthyl 3,5dicarbomethoxybenzenesulfonate, 5-[4-(sodiosulfo)
-Phenoxy]dimethyl isophthalate, 5.
Examples include [(sodiosulfo)-phenoxy] distyl terephthalate and 5-[4-(sodiosulfo)-phenoxy] isophthalic acid. Among these, sodiosulfoisophthalic acid to which Na metal is bonded is particularly preferred. The composition and ratio of these are not particularly limited as long as the obtained polyester is water-soluble, but a copolymerized polyester of 20 to 40 mol% of sodiosulfoisophthalic acid is desirable. The resulting polyester has an intrinsic viscosity (IV) of 0.15
~0.5, it is a solid and stable polymer at room temperature, and when dissolved in water or hot water, it becomes transparent or in a suspended state. In addition, if the intrinsic viscosity (IV) of the water-soluble polyester becomes too small, the effect of the present invention tends to decrease, while if it becomes too large, the time required to dissolve in water or hot water tends to increase. It is desirable to set it to 0.15-0.50. The effect of this water-soluble polyester is to increase the fiber-to-fiber friction to the extent that it does not affect the convergence effect of water-soluble polyester and the subsequent process.
This is due to the effect of suppressing slippage, misalignment, etc. between the wound yarns, and due to these effects, the ``mark'' that occurs when undrawn melt-spun synthetic fiber yarns are wound at high speed. can be resolved. As explained above, according to the present invention, 2500
Even when winding is performed at high speeds of m/min or higher, it is possible to wind the yarn without causing any "crossing", and the problem of inducing unwinding defects in the subsequent process and resulting in yarn breakage, etc. is eliminated. be done. Hereinafter, the present invention will be explained in further detail with reference to Examples. Example 1 At a spinning speed of 3300 m/min, undrawn polyethylene terephthalate multifilaments of 115 denier/36 filaments were spun, and three water-soluble polyesters produced according to the usual polyester polymerization method from the following feed composition were polyester. To an oil agent consisting of 63% by weight of ether (molecular weight 2700), 20% by weight of polyoxyethylene-added alkyl octanoate, 15% by weight of alkyl phenyl ether, and 2% by weight of alkyl sulfonate sodium salt, 10% by weight of each was added to form an aqueous oil agent. The package was treated with a liquid solution, rolled up, and the condition of the end face of the package was compared.
The results are shown in Table 1. The concentration of the aqueous oil solution was 8% by weight, and the amount attached to the yarn was 0.32% by weight. In the case of the products treated with the aqueous oil solution containing the water-soluble polyester of the present invention, the occurrence of "steps" on the end face of the package was not observed at all. Γ Water-soluble polyester A IV = 0.36 5. Sodiosulfoisophthalic acid 40 parts by weight Terephthalic acid 60 parts by weight Ethylene glycol 56 parts by weight Γ Water-soluble polyester B IV = 0.48 5. Sodiosulfoisophthalic acid 20 parts by weight Terephthalic acid 80 parts by weight Part ethylene glycol 76 parts by weight Polyethylene glycol (MW600) 5 parts by weight Γ Water-soluble polyester C IV = 0.48 5.Sodiosulfoisophthalic acid 10 parts by weight Terephthalic acid 90 parts by weight Ethylene glycol 85 parts by weight Polyethylene glycol 15 parts by weight

[Table] Example 2 Undrawn polyethylene terephthalate multifilaments of 115 denier/36 filaments were spun at a spinning speed of 3300 m/min, treated with an aqueous oil solution containing water-soluble polyester at various concentrations, and then wound. The conditions of the end faces of the package were compared. The results are shown in Table 2. The water-soluble polyester B described in Example 1 was used as the water-soluble polyester, the concentration of the aqueous oil solution was 8% by weight, and the amount attached to the yarn was 0.32% by weight. Next, the product obtained as described above was subjected to spindle false twisting (spindle rotation speed: 600,000 rpm), and the occurrence of fuzz was examined. The results are also shown in Table 2. As is clear from Table 2, the spinning oil is
It can be seen that the addition of 10% by weight of water-soluble polyester can eliminate the ``mark'' of the package without affecting post-processability. If the amount of water-soluble polyester added is less than 1% by weight, there will be no effect of preventing the occurrence of "square", and if the amount added exceeds 10% by weight, processed fuzz will increase.

[Table] Example 3 A polyethylene terephthalate undrawn multifilament of 115 denier/36 filaments was spun at various spinning speeds, and 10% by weight of Example 1 was obtained.
The water-soluble polyester A described above was added to the spinning oil shown in Example 1, treated with an aqueous oil solution adjusted to a concentration of 12%, and wound at various winding speeds. In addition, the product was subjected to spindle false twisting (spindle rotation speed: 600,000 rpm), and processed fuzz was examined. The results are shown in Table 3. On the other hand, for comparison,
The same tests as in Example 3 were conducted using a spinning oil in which no water-soluble polyester was added, and the results are shown in Table 3. As is clear from Table 3, when water-soluble polyester is added to the spinning oil, even when the winding speed is high, it is possible to eliminate the "square" with almost no effect on the false twisting processability.

[Table] * No water-soluble polyester added

Claims (1)

[Claims] 1 Melt-spun synthetic fiber undrawn yarn is mixed with dicarboxylic acid, alkylene glycol and SO ₃ M group (M
water-soluble polyesters or dicarboxylic acids, alkylene glycols, bifunctional compounds and polyalkylene glycols having an SO ₃ M group (where M represents hydrogen or a metal ion); A water-soluble polyester consisting of
A melting process characterized by processing with an aqueous oil solution containing 1 to 10% by weight of the total oil component of a water-soluble polyester of 0.15 to 0.50, and then rolling it up at a speed of 2500 m/min or more without performing fluid entanglement treatment. Spinning method.