JPH06173169A - Treating agent for synthetic fiber - Google Patents

Abstract

PURPOSE:To obtain a treating agent suitable for the efficient production of a synthetic fiber for industrial material required to have high tenacity and low shrinkage. CONSTITUTION:This treating agent contains (A) 50-80% smoothing agent composed mainly of an ester-based smoothing agent having a molecular weight of >=600, (B) 1-20% polymeric activation agent having a molecular weight of >=5,000 and exhibiting liquid state at 15 deg.C, (C) 0.1-5% polyphenylene ether and (D) <=35% nonionic activation agent having a molecular weight of >=600. The sum of (A), (B) and (C) is <=90%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a treating agent for synthetic fibers. More specifically, the present invention relates to a novel treating agent that is particularly suitable for efficiently producing synthetic fibers for industrial materials that require high strength and low shrinkage properties.

[0002]

2. Description of the Related Art Conventionally, in the production of synthetic fibers, various treating agents have been added in the spinning / drawing process depending on the purpose, but in recent years, the speed of the spinning / drawing process has been increased in order to improve productivity or quality. In addition, the heat treatment temperature for obtaining fibers with lower shrinkage is increasing. Therefore, there is a demand for a treatment agent which has excellent oil film strength at high temperature and high contact pressure and also excellent heat resistance.

In order to satisfy such requirements, in addition to an ester-based leveling agent having a specific molecular weight and a nonionic-based activator, 1
A treatment agent has been proposed in which a specific amount of a polymer activator having a molecular weight of 5000 or more and which is in a liquid state at 5 ° C. is blended (Japanese Patent Laid-Open No. HEI-2).
-145867). However, with only the above combination, although the spinnability is good, there is a problem that the fiber-fiber friction is too low and the wound bobbin is likely to be broken in the wound bobbin.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art, to reduce friction at high contact pressure,
It is an object of the present invention to provide a novel treatment agent for synthetic fibers, which has good heat resistance and is less likely to cause collapse of a wound yarn.

[0005]

Means for Solving the Problems As a result of intensive investigations by the present inventors in order to achieve the above object, in addition to an ester-based smoothing agent having a specific molecular weight, an ester-based or ether-based polymer activator and a nonionic activator, If a small amount of a specific polyphenylene ether is used together, heat resistance and friction resistance at high contact pressure will not be deteriorated, and the fiber-to-fiber friction at low contact pressure can be increased and the bobbin will not collapse. The present invention has been accomplished by finding that it becomes difficult to generate.

That is, according to the present invention, (a) the molecular weight is 600.
50-80% by weight of a smoothing agent (A component) containing the above ester-based smoothing agent as a main component, and (b) an ester-based or ether-based polymer activator (B) having a molecular weight of 5000 or more and being liquid at 15 ° C (B). Component) 1 to 20 wt%, (c) polyphenylene ether (C component) 0.1 to 5 wt%,
(D) Nonionic activator having a molecular weight of 600 or more (component D)
35% by weight or less, and W _A + W _B + W _C is 90% by weight or less, wherein W _A , W _B and W _C are A components, respectively. , B component and C component content. ].

The synthetic fiber targeted by the present invention is not particularly limited as long as it has been conventionally used for industrial materials, and examples thereof include polyester fiber, polyamide fiber, aramid fiber and the like, and particularly polyethylene terephthalate. Fibers are preferred.

The treating agent of the present invention applied to such synthetic fibers must contain 50 to 80% by weight of a smoothing agent (component A) whose main component is an ester smoothing agent having a molecular weight of 600 or more. (Here, the main component is 5 in the A component.
0 weight% or more, preferably 80 weight% or more). When the molecular weight of the ester-based smoothing agent is less than 600 or the proportion of the component A in the component A is less than 50% by weight, the heat resistance of the treatment agent is poor, and the heat is easily applied during spinning or after-processing, and the fumes are easily emitted. It is not preferable because it not only causes the contamination of the work environment but also causes tar to be formed on the heat roller, the yarn guide, etc. to break the single yarn or contaminate the product. On the other hand, if the content of the component A is less than 50% by weight, the smoothness of the treating agent is deteriorated, so that the yarn is broken during the drawing heat treatment, and the strength is lowered when the cord or the fabric is formed, which is not preferable. .

The ester-based smoothing agent preferably used is not particularly limited as long as it has a molecular weight of 600 or more. For example, monohydric ester of higher alcohol and higher fatty acid,
Specific examples include polyhydric esters of higher alcohols and aliphatic dibasic acids, polyhydric esters of polyhydric alcohols and higher fatty acids (including natural oils), and polyhydric esters of thiodipropionic acid and higher alcohols. Specifically, isopentacosyl oleate, isotetracontyl oleate, diisostearyl thiodipropionate, dioleyl thiodipropionate, dioleyl adipate and the like are preferable. Among them, a thiodipropionic acid ester-based smoothing agent is particularly preferable because it has good heat resistance.

As the polymer activator (B) which constitutes the treating agent of the present invention, there have been proposed polyether-based agents,
Any polyester-based can be used, as the ester-based polymer activator, an alkylene oxide-modified polyester obtained by polymerizing an alkylene oxide adduct of an ester consisting of a polyhydric alcohol and a hydroxycarboxylic acid and maleic acid, Examples thereof include polyesters obtained from polyalkylene glycols and dibasic acids, and there is no particular need to limit the terminals.
That is, a high molecular weight polyester having a polyalkylene glycol in either the main chain or the side chain may be used. Specifically, for example, a polyester from castor oil to which ethylene oxide is added and maleic acid or maleic anhydride,
Examples thereof include polyesters made from polytetramethylene glycol with alkylene oxide addition and maleic acid or maleic anhydride.

On the other hand, as the ether type polymer activator, ethylene oxide (EO), propylene oxide (P
O), butylene oxide (BO), and other alkylene oxides polymerized (homopolymers, copolymers), or polyhydric alcohols with the above alkylene oxides added and polymerized. The terminal group of such a compound may be a hydroxyl group, an alkoxy group or a phenoxy group. Also, the copolymerization ratio is not particularly limited as long as it exhibits a liquid state at 15 ° C. Preferable examples include polytetramethylene glycol or polyethylene glycol in which ethylene oxide and propylene oxide are randomly addition polymerized at both ends.

The component B must have a molecular weight of 5,000 or more and be liquid at 15 ° C., and its content must be 1 to 20% by weight. Molecular weight 5000
When the content is less than or less than 1% by weight,
It is not preferable because the strength of the oil film is lowered, the friction at the time of high contact pressure is increased, and the drawability is lowered under severe spinning conditions. On the other hand, if the content exceeds 20% by weight, the friction between the fibers at the time of low contact pressure becomes too small, and the winding collapse easily occurs during or after winding the yarn, which is not preferable.

Next, in the present invention, polyphenylene ether is contained in an amount of 0.1 to 5% by weight, preferably 0.2 to 2% by weight, and particularly preferably 0.1 to 0.5% by weight. If the amount is less than 0.1% by weight, the effect of increasing friction at low contact pressure is insufficient and the effect of suppressing winding collapse cannot be obtained. On the other hand, if it exceeds 5% by weight, the viscosity of the treating agent itself becomes too large, and although the rolling collapse phenomenon is suppressed, running friction with a guide or the like becomes large, and fluffing easily occurs, which is not preferable.

The polyphenylene ether referred to here is
For example, a phenol derivative such as phenylphenol or phenoxyphenol and an aromatic halogen compound are used as raw materials to be synthesized by the Ullmann reaction, and those represented by the following formulas are preferably used.

[0015]

[Chemical 1]

In the formula, Ar represents a phenylene group, and among them, an m-phenylene group is preferable. R is a carbon number 12
It is preferable that the alkyl group is from 20 to 20 from the viewpoint of improving the compatibility with other treating agent components and reducing the running friction due to the lowering of the viscosity of the treating agent. L is an integer of 1 to 4, m is 0 or 1, n
Represents an integer of 0 to 2.

Specific examples of the polyphenylene ether include, for example,

[0018]

[Chemical 2]

And the like. Among them, didodecyl diphenyl ether is particularly preferable because of its low viscosity.

As the nonionic activator (component D), an ethylene oxide-added alkyl (benzyl) phenol having an emulsifying action and excellent in smoke emission and smoothness, a derivative of a polyhydric alcohol such as castor oil, hydrogenated castor oil,
Examples include polyhydric alcohols such as trimethylolpropane and glycerin to which 5 to 40 mol of ethylene oxide is added, and esters of these ethylene oxide-added polyhydric alcohols and aliphatic carboxylic acids. In particular,
Examples thereof include polyoxyethylene hydrogenated castor oil ether and polyoxyethylene sorbitan trioleate. The molecular weight of the nonionic activator (D component) is 600 or more,
The usage rate must be 35% by weight or less. If the molecular weight is less than 600, the fuming property of the treatment agent increases, while if the usage rate exceeds 35% by weight, smoothness is impaired, which is not preferable.

In particular, when 5 to 15% by weight of ethylene oxide-added alkylphenol or ethylene oxide-added alkylbenzylphenol is used as a part of the component D, the content of polyphenylene ether is 0.
Even in a small range of 1 to 0.5% by weight, the bobbin does not easily collapse, and since the content of polyphenylene ether is small, the running friction of the yarn hardly increases.
It is preferable because the generation of fluff during the weaving of yarn is suppressed.

In this treatment agent, the proportion of A + B + C used must be 90% by weight or less. If it exceeds 90% by weight, the emulsifiability of the treating agent is deteriorated, which is not preferable.

The treatment agent of the present invention comprises, in addition to the above-mentioned components A, B and C, an antistatic agent, an emulsification auxiliary agent, an oxidation stabilizer, a silicone,
There is no problem even if a small amount of natural waxes is added.
For example, as the antistatic agent, salts of oleyl phosphate (Na, K, amine, etc.), salts of polyoxyethylene oleyl phosphate (Na, K, amine, etc.), Na salt of dioctyl sulphosuccinate, alkane sulphonate Examples thereof include salts (Na, K, amine, etc.).

To add such a treating agent to synthetic fibers,
In the spinning process, a conventionally known method such as roller lubrication or nozzle lubrication can be used in the form of a non-hydrous type or an emulsion emulsified with water, but when high-speed spinning or high-temperature heat treatment is required, the non-hydrous type is used. It is preferable that the treatment agent is applied by a nozzle lubrication method.

The coating amount of the treating agent is 0.3 to the fiber.
It is desirable to set it to 1.5% by weight, preferably 0.3 to 1.0% by weight.

[0026]

The treatment agent of the present invention has a molecular weight of 60.
Since an ester-based smoothing agent of 0 or more is blended as a main component, the frictional resistance between the running yarn and the yarn guide is reduced, and the occurrence of single yarn breakage and fuzz during yarn making and weaving is extremely reduced. Further, the above-mentioned treating agent has an average molecular weight of 5,000.
It is presumed that the above ester- or ether-based polymer activator is blended, and the compound is excellent in miscibility with other oil agent components and has a high molecular weight, but it is adhered on the fiber. The oil film of the treating agent is strengthened to prevent the fibers from coming into direct contact with each other, especially when the fibers are abraded under a high contact pressure, and improve the lubricity between the fibers to improve the abrasion resistance. Therefore, by using such fibers for high-density fabrics for industrial materials, the restraining force between the fibers can be reduced, and abnormal stress concentration can be suppressed, so that the strength of the fabric can be made closer to the ideal value. . Also,
Since the abrasion resistance between the fibers is also improved, the strength retention during use is also improved, and the durability is significantly improved.

Further, since the treatment agent of the present invention further contains a specific amount of polyphenylene ether (C), the reduction in friction between fibers under low contact pressure due to the use of the above-mentioned polymer activator is suppressed. On the other hand, the friction between fibers under high contact pressure does not increase so much. As a result, it is possible to suppress the winding collapse when the yarn is wound on the bobbin without aggravating the single yarn breakage and the generation of fluff due to the friction between the yarn running under high contact pressure and the yarn guide.

The treatment agent of the present invention having the above characteristics is particularly suitable for fibers for textiles of industrial materials, and for high strength and abrasion resistant high density textiles which are subjected to dyeing processing or resin processing such as seat belts. It is a suitable treating agent. That is, the deterioration of the fabric quality performance due to the rubbing with the yarn guides received during weaving is small, and the abrasion resistance between the fibers in the product fabric subjected to the dyeing process is improved, so that the fabric having excellent mechanical properties and durability is obtained. The obtained fiber can be obtained with good process stability.

[0029]

EXAMPLES The present invention will be described in more detail below with reference to examples. Each evaluation item was as follows. Fiber-fiber friction at high contact pressure (extreme pressure friction) One end of the fiber is fixed to a U gauge, applied to a pulley, further twisted three times, and pulled with a load of 3 kg (T ₁ ).
The crossing angle between fibers is set to 20 °, the U gauge is pulled at a speed of 0.1 cm / min, the tension (T ₂ ) detected by the U gauge is measured, and the extreme pressure friction (T ₂ −T ₁ ). I asked. Spinnability: A bobbin with a diameter of 60 mm and a length of 600 mm can be used with a width of 500 mm to
It was wound in kg and the number of fluffs having a surface length of 1 mm or more was measured. Fiber-fiber friction at low contact pressure (μ F / F) A yarn of about 500 m is wound around a cylinder with a diameter of 5 cm and a length of 30 cm with a spiral angle of ± 15 degrees and a winding tension of about 20 g.
Take about 30 cm of the same thread, hang it on this cylinder and
A load of 0 g was applied, a U gauge was placed on the opposite side, the cylinder was rotated at a peripheral speed of 0.1 m / min, and the tension was measured. The difference between the winding shape the 10kg wound bobbin of the central outer diameter L ₀ (mm) and the end outer diameter L ₁ (mm) represented by (L ₀ -L _1). If this value is 5 or more, winding collapse tends to occur. Running friction (μd F / M) A yarn was brought into contact with a chrome-plated matte surface chrome-plated pin having a diameter of 50 mm at a winding angle of 180 ° and a load of 20 g, and the yarn was run at a yarn speed of 300 m / min to measure the friction coefficient.

[0030]

Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.95 was melted and discharged to form a 250-filament yarn, and after the yarn was solidified, it was passed through an oiling roller to obtain a fiber.
The treatment agent emulsion shown in (1) is applied so as to make the treatment agent pure content to be 0.5% by weight based on the weight of the yarn, and after taking-up, stretching heat setting is performed without winding once to 1500 de / 2.
A drawn yarn of 50 fil was obtained. At this time, the heat setting temperature is 23
The coiling speed was 0 ° C. and the winding speed was 5000 m / min. The results are shown in Table 3.
Shown in.

[0031]

[Table 1]

[0032]

[Table 2]

[0033]

[Table 3]

Continuation of front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display area D06M 15/53 // D06M 101: 30 D06M 13/20 15/53

Claims (1)

[Claims] 1. (a) 50 to 80% by weight of a smoothing agent (component A) whose main component is an ester-based smoothing agent having a molecular weight of 600 or more, and (b) a liquid having a molecular weight of 5000 or more and 15 ° C. Ester- or ether-based polymer activator (component B) is 1 to 20% by weight, (c) polyphenylene ether (component C) is 0.1 to 5% by weight, and (d) molecular weight is 600.
More nonionic surfactants (D component) and 35 wt% or less, containing, and W _A + W _B + W _C synthetic fiber-processing agent, characterized in that 90 wt% or less. [However, W _A , W
_B and W _C represent the contents of A component, B component and C component, respectively. ]