JP2520496B2 - Oil agent for polyester fiber and polyester fiber to which it is attached - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an oil agent for polyester fiber suitable for obtaining a polyester fiber which has excellent yarn-forming efficiency during fiber production and also has good weaving efficiency during weaving with sizing. The present invention relates to a polyester fiber to which the oil agent is attached.

(Prior Art) In recent years, the progress of the spinning technology in the production of synthetic fibers has been remarkable, and the spinning speed has been increasing with the development of the high-speed winder. It may also be referred to as a straight line) is becoming more common.

However, as the spinning speed increases, abrasion between the running yarn and various yarn guides (rollers, guides, etc.) increases, and not only the quality of the yarn obtained by inducing single yarn breakage is impaired, but also
Since it is necessary to set heat at a higher temperature than before in order to impart predetermined physical properties, especially heat shrinkage properties, the amount of fuming of the oil component increases, and the adhesion of scum derived from the polyester oligomer to the roller surface also increases. It also includes problems that occur when thread breakage occurs frequently.

In particular, polyester fibers for industrial materials used in sails, tents, etc. are required to have dimensional stability of yarn extremely important and heat shrinkage rate to be extremely small as compared with ordinary polyester fibers for clothing. Therefore, the above heat setting needs to be performed at a higher temperature than that of the fiber for clothing, the amount of smoke of the oil agent component is less (heat resistance), the amount of oligomer scum is less (resistance to oligomer scum), and the temperature is high at high temperature and high speed. Oils with excellent lubricity have become important.

On the other hand, when passing through a weaving / knitting process, a yarn obtained by such a yarn is often given a sizing agent that matches each process in order to increase the efficiency of the weaving / knitting process. However, if the treatment oil applied in the spinning process is inappropriate at this time, the glue film formed on the broken yarn is softened to reduce the protective action of the yarn,
Alternatively, it is referred to as "size removal", and the size agent is dropped and accumulated at various places of the loom to increase friction with the yarn, causing fluff and yarn breakage, which causes a problem of impeding weaving / knitting efficiency.

For this reason, it has been proposed in the past to use an amide component in a spinning oil agent, but according to the recent studies by the present inventors in high-speed spinning, although such an agent is good in terms of the sizing property, the spinning oil agent is It was found that if too much is used, the heat resistance or lubricity will be impaired and the spinning efficiency will be impaired.

(Problems to be Solved by the Invention) The present invention has been made in view of the above background, and an object thereof is to have excellent heat resistance, oligomer scum resistance and lubricity in a yarn making process, and “ Glue removal ”
An object is to provide an oil agent for polyester fibers which does not induce the occurrence of good weaving efficiency.

(Means for Solving the Problem) As a result of intensive studies to achieve the above object, the present inventors have found that a monohydric alcohol ester having a molecular weight within a specific range and a polyhydric alcohol moiety having a hydroxyl group in the molecule. The present inventors have found that an oil agent blended with an ester can simultaneously improve heat resistance, lubricity and desizing resistance, and arrived at the present invention.

That is, according to the present invention, 1. The following components (A) and (B) are contained as essential components, and the content of each component satisfies the following formulas (i) to (ii) at the same time. Characteristic oil agent for polyester fiber.

(A) Aliphatic monohydric alcohol ester that is liquid at room temperature and has a molecular weight of 550 to 750. (B) Liquid at room temperature that has one or more hydroxyl groups in the molecule and has a molecular weight of 550 to 750. Partial alcohol alcohol ester (i) 20 ≦ W _A ≦ 75 (ii) 5 ≦ W _B ≦ 15 And 2. A polyester fiber comprising the above oil agent adhered to the fiber in an amount of 0.35 to 1.0% by weight (as an active ingredient of the oil agent).

Content of aliphatic monohydric alcohol ester (A component) which is an essential component of the oil agent for polyester fiber of the present invention (W _A :
% By weight) should be in the range of 20-75% by weight, preferably 30-65% by weight. If it is less than 20% by weight, the lubricity required for high-speed yarn production cannot be imparted, and the occurrence of single yarn breakage tends to increase, and the improvement effect for problems such as "paste removal" during weaving Also few. On the other hand, when it exceeds 75% by weight, a problem occurs in the emulsion stability of the oil agent system, which is not preferable.

Such an aliphatic monohydric alcohol ester is an ester compound obtained from a monohydric higher alcohol and a monovalent or divalent aliphatic carboxylic acid, and its molecular weight is 550 to 7
It should be 50, preferably 600 to 700, and be liquid at room temperature. Specifically, a higher alcohol having 20 to 34 carbon atoms is used as the monohydric higher alcohol, and higher fatty acids such as stearic acid, oleic acid and palmitic acid, or adipic acid,
Mono- or diester compounds using dibasic acids such as sebacic acid and thiodipropionic acid can be mentioned. And monoesters such as diisostearylthiodipropionate, diesters such as dioleyl adipate, and diisostearyl sebacate.

Here, only aliphatic monohydric alcohol esters having a molecular weight of more than 750 or becoming solid at room temperature or polyhydric alcohol esters having no hydroxyl group such as coconut oil and rapeseed oil which are triglycerides were used as the component A. In this case, the size loss during weaving may increase, or the friction between the running yarn and the yarn guide may increase during yarn production, resulting in breakage of single yarn, which is not preferable.

Further, in the case of an aliphatic monohydric alcohol ester having a molecular weight of less than 550, not only is it a factor that causes volatilization due to heat at the time of spinning to generate smoke and pollute the working environment, but also a heat roller,
It is not preferable because tar is formed in the yarn guide and the like, which may cause breakage of single yarn.

The polyhydric alcohol partial ester (component B) which is another essential component of the present invention is required to be liquid at room temperature, have a hydroxyl group in the molecule, and have a molecular weight in the range of 550 to 750. is there. Further, its content must be 5 to 15% by weight, preferably 7 to 13% by weight, based on the active ingredient of the oil agent.

The present invention is presumed to be because the polyhydric alcohol partial ester has excellent compatibility with the polyester oligomer (mainly a cyclic trimer) and dissolves the oligomer precipitated by the treatment such as heating during the production of the polyester fiber in the oil agent system. It was found that the effect of suppressing the accumulation of oligomer scum on the roller, the yarn guide, etc. is great. Therefore, if the amount used is too small, these effects will not be exhibited, while if it is too large, the effect of the above-mentioned component A (paste removal resistance) will be reduced, and the friction between the running yarn and the yarn guide will increase and the single yarn Since the cut tends to increase,
The amount used should be 5 to 15% by weight as described above.

Further, in the case of a partial ester of a polyhydric alcohol which does not have a hydroxyl group in the molecule, has a molecular weight of less than 550 or exceeds 750, or is solid at room temperature, squeeze-out of paste or running yarn and yarn at the time of spinning It is not preferable because the friction with the guide is increased, or the smoke is increased during the yarn making, which causes tars to be formed on the rollers, the yarn guide and the like, resulting in breakage of the single yarn.

It is particularly preferable that the oil agent of the present invention further uses the following C component and D component in combination. By using such a component in combination, the D component is oriented on the metal surface such as a thread guide,
On the other hand, since the C component is oriented on the fiber surface, it is presumed that this, together with the A component and the B component, reduces friction under high contact pressure. It is therefore presumed that the scum accumulation on the roller surface is reduced, the drawability is improved, the fluff of the drawn yarn is reduced, and further, the abrasion resistance of the fiber is improved. It

In order for the C component and the D component to exhibit the above-mentioned functions, it is desirable that the oil agent contains 1% by weight or more of each.

As the C component, an organic amine represented by the following general formula (I) is preferably used.

However, R ₁ is a C _8-22 saturated or unsaturated alkyl group,
R ₂ and R ₃ are each hydrogen or a C _1-5 alkyl group, and A is C
_2-4 alkylene groups, and n and m each represent an integer satisfying m + n = 0-10. If the carbon number of R ₁ is 7 or less, the extreme pressure lubrication performance deteriorates (friction increases), while if the carbon number of 23 is 23 or more, it becomes difficult to obtain commercially, which is not preferable. In addition,
More preferably, R ₂ and R ₃ are both alkyl groups.

Specific examples of the C component include stearylamine, laurylmethylamine and ethylene oxide / propylene oxide adducts thereof, octyldimethylamine, lauryldimethylamine, oleyldimethylamine, isostearyldimethylamine, and the like.
Examples thereof include lauryl diethylamine.

Further, as the component D used in combination with the organic amine (component C), (a) a C _8-22 higher alcohol, a C _8-22 alkyl group-containing phenol, and an alkylene oxide adduct thereof (10 mol) At least one phosphoric acid partial ester selected from the following) and / or (b) C _8-22
The higher fatty acids of are preferably used.

Examples of the phosphoric acid partial ester include octyl alcohol, lauryl alcohol, oleyl alcohol,
Isostearyl alcohol, phosphoric acid mono- or diesters such as nonylphenol, or higher alcohols thereof,
Phosphoric acid mono- or diesters such as polyoxyalkylene glycol monoalkyl ether and polyoxyalkylene glycol monoalkylphenyl ether, which are obtained by adding 10 mol or less of ethylene oxide and / or propylene oxide to alkylphenol, are preferably used.

Examples of higher fatty acids include oleic acid, capric acid, lauric acid, palmitic acid, stearic acid,
Illustrative examples include isostearic acid.

As described above, the oil agent for polyester fiber of the present invention is
And B components as essential components, and it is necessary that the components (i) and (ii) are simultaneously contained in a range satisfying the formulas, and preferably,
Further, each of the C and D components is contained in an amount of 1% by weight or more, but it goes without saying that other components may be contained within the range not impairing the object of the present invention. Such compounding agents include, for example, aromatic ester-based leveling agents having heat resistance, emulsifiers for use as emulsions, antistatic agents for preventing static electricity, antioxidants for improving heat resistance, and even polar agents for oil agents. Examples thereof include organic or inorganic additives for enhancing pressure lubricity and oil film strength.

In order to apply the oil agent of the present invention described above to the polyester fiber, it may be any time after the spun yarn is solidified, but it is usually applied to the yarn before the take-up roller. .

As a preferable means for applying, the above oil agent is formed into an aqueous emulsion, and a method of applying it through a metering oiling nozzle can be mentioned, but the application amount is 0.35 to 1.0% by weight relative to the fiber weight as the oil agent pure content. Therefore, the weaving efficiency of the fibers obtained by the above treatment is improved. If this amount is less than 0.35% by weight, no sufficient effect can be obtained. On the other hand, if it exceeds 1.0% by weight, the effect is not increased and excess oil agent adheres to the roller, thread guide, etc. Not preferable.

(Effects of the Invention) The oil agent of the present invention is an oil agent suitable for producing polyester fibers, particularly polyester fibers for industrial materials, and heat resistance, scum resistance, and heat resistance during high-speed spinning and heat setting at high temperature. Excellent lubricity and good spinning efficiency can be obtained. Also,
When weaving the obtained fibers with sizing, sizing does not occur and good weaving efficiency can be obtained.

(Example) Hereinafter, the present invention will be described in more detail with reference to Examples.

In the examples, heat resistance, oligomer scum resistance, raw yarn fluff, abrasion resistance, glue film properties and glue removal properties were evaluated by the following methods.

(1) Heat resistance During spinning, the state of smoke generated from the heat-setting roller heated to 220 ° C and the state of stains on the surface of the heat roller (heat deterioration of the adherent oil agent) are visually observed and judged according to the following criteria did.

Roller stain resistance Grade Low stain generation: ○ Medium: △ High: × Smoke resistance Grade Low smoke generation: ○ Medium: △ High: × (2) Oligomer scum resistance Spinning was started by the method shown in the example, and spinning was started 1 The generation state of oligomer scum adhering to the cold roller immediately after the heat setting roller heated to 220 ° C. after the day was visually observed and judged according to the following criteria.

Grade Oligomer scum Almost none: ○ Small to medium: △ Large: × (3) Raw yarn fluff: 160 raw yarns are collected, and the number of fluffs (single yarn breaks) within 200,000 m is counted and integrated. From this, the number of fluffs per 10 ⁶ m was determined and evaluated according to the following three grades.

Number of fluff (ke / 10 ⁶ m) Grade 0 to 0.2: ◎ 0.2 to 0.5: ○ 0.5 to 2.0: △ 2.0 or more: × (4) Scratch resistance Fiber and metal (F / M) and fiber and fiber (F / F / The scratch resistance of F) was evaluated according to the measuring methods shown in the following table.

Evaluation Criteria Evaluation of fluff Grade Grade Almost no fluff: ◎ Small fluff: ○ Large fluff: △ Thread breakage: × (5) Evaluation of glue film properties As a substitute evaluation for observing the properties of the glue film on the fibers when the fibers were pasted, the following model experiments were performed.

A casting solution was obtained by pouring a mixed aqueous solution of a polyvinyl alcohol and a polyacrylic acid ester as a main component and an oily agent at an effective component ratio of 5/1 onto a glass plate, followed by air drying and heat treatment. The film was sampled in a strip shape and a tensile test was conducted, and the following criteria were evaluated.

In comparison with a film sample obtained only from a sizing agent that is not mixed with an oil agent, a film having a film strength of 30% or more or an elongation of 250% or less was marked as "○", and a film outside this range was marked as "X".

(6) Evaluation of "paste removal" property As a substitute characteristic for the "paste removal" phenomenon in the actual weaving process, part of the glue film on the surface of the yarn against friction that substitutes in the axial direction of the sizing yarn Was evaluated by the frequency of peeling from the yarn surface.

Using a sizing agent mainly composed of polyvinyl alcohol and a polyacrylic acid ester, polyester fibers were sizing by a usual roller sizing method so that the target adhesion amount was 5.0% by weight, and a sizing yarn was obtained. Next, 20 pieces of this sizing thread are arranged at equal intervals, fixed terminals are installed so that both ends are not disturbed, and one end is fixed by a chuck 4 as shown in FIGS. / Apply a weight 6 to the book and apply tension to the whole sample through the pulley 5. Put it on the picture
1, 2 and 3 are reeds installed at intervals of 10 cm and a movable table 7
The movable base 7 can be reciprocated over a width of 5 cm in parallel with the yarn axis. The sample sizing yarn is set so as to have an opening angle of 108 ° in the central reed 2 as shown in FIG.

Then, the movable table 7 was reciprocated to the left and right, and after 10 reciprocations, the peeling state of the glue film in the rubbing portion of the reed and the yarn was carefully observed, and the ratio of the number of peeled samples to all 20 samples was calculated as follows. Expressed by grade.

In addition, the determination was made here by averaging the results of three times.

 Ratio of number of peeled pieces Grade less than 25%: ○ 25 to 50%: Δ exceeding 50%: × (7) Comprehensive evaluation It was expressed in the following four stages.

Very good: ◎ Good: ○ Slightly insufficient: △ Not possible: × Example 1 Polyethylene terephthalate having an intrinsic viscosity of 1.00 was melt-discharged to form a 48 filament yarn. This yarn was applied through an oiling roller so that the oil agent emulsion shown in Table 1 was made into a pure oil agent content so as to be 0.5% by weight of the thread weight. After that, with a take-off roller, take off at 600 m / min. 9
After preheating at 0 ° C, heat setting at 220 ° C while stretching 5.0 times between the take-up roller and the stretching heat setting roller,
After that, it is wound up via an empty roller 250d / 48f, strength 8.0
A drawn yarn with g / d and 150 ° C dry yield of 5% was obtained.

The results of evaluation of the drawn yarn obtained at this time by the above-mentioned measuring method are summarized in Table 2.

As is clear from the present results, the level having the oil agent within the range of the present invention is excellent in heat resistance and lubricity, excellent in sizing properties in the weaving process, and has a remarkable effect on yarn making and post-processability.

[Brief description of drawings]

1 and 2 are schematic diagrams of the apparatus used for evaluating the glue removal characteristics, FIG. 1 is a side view, and FIG. 2 is a plan view.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location D01F 6/62 302 D06M 13/36 D06M 101: 32 13/32 (56) Reference JP-A-54-138687 ( JP, A) JP 56-148968 (JP, A) JP 54-82497 (JP, A) JP 62-24549 (JP, B2) JP 59-34819 (JP, B2)

Claims (3)

(57) [Claims] 1. The following components (A) and (B) are contained as essential components, and the content of each component is from the following (i) to (i).
An oil agent for polyester fibers, which simultaneously satisfies the formula (ii). (A) Aliphatic monohydric alcohol ester that is liquid at room temperature and has a molecular weight of 550 to 750. (B) Liquid at room temperature that has one or more hydroxyl groups in the molecule and has a molecular weight of 550 to 750. Partial alcohol alcohol ester (i) 20 ≦ W _A ≦ 75 (ii) 5 ≦ W _B ≦ 15 2. The oil agent for polyester fibers according to claim 1, which contains the following components (C) and (D) in an amount of 1% by weight or more based on the active ingredient of the oil agent. (D) a higher alcohol of C _{8 to 22,} phenol and at least one phosphoric acid partial esters and / or fatty acids C _{8 to 22} selected from alkylene oxide adducts thereof having an alkyl group of C _{8 to 22.} 3. A polyester fiber in which the oil agent according to claim 1 or 2 is attached in an amount of 0.35 to 1.0% by weight (as an active ingredient of the oil agent) based on the weight of the fiber.