JPH06101171A - Spinning lubricant for synthetic fiber - Google Patents

Abstract

PURPOSE:To provide a spinning lubricant composition containing a lubricating component essentially composed of squalane, excellent in low fuming properties and low friction, capable of remarkably improving the efficiency of spinning and low in environmental pollution. CONSTITUTION:A lubricant composition containing a lubricating component composed mainly of squalane excellent in heat resistance and lubricity is emulsified and the resultant emulsion is applied, e.g. after spinning and before stretching of a synthetic fiber. Since this lubricant composition is excellent in low fuming properties and low friction, it can exhibit excellent properties in a high-speed spinning and, therefore, improve the spinning efficiency. In addition, this lubricant is readily biodegradable and, therefore, remarkably excellent also in environmental safety.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil agent for producing thermoplastic synthetic fibers. More specifically, the present invention relates to a yarn-forming oil agent for synthetic fibers, which is excellent in low abrasion resistance and low smoke generation, is particularly suitable for high-speed yarn production and high strength, and has good biodegradability and little environmental pollution.

[0002]

2. Description of the Related Art In recent years, thermoplastic synthetic fiber yarn has been sped up to improve productivity, and since it is sped up, it is subjected to high temperature heat treatment to reduce friction during high speed running.
In addition, a heat-resistant oil agent that reduces the amount of smoke generated during heating is desired. On the other hand, in order to reduce the environmental pollution of the waste oil agent or to improve the safety for workers who handle the oil agent, improvement in biodegradability of the oil agent has been desired in recent years.

However, in order to achieve the low friction required for speeding up the conventional spinning process, low-molecular weight smoothing agents such as low-viscosity mineral oil and low-molecular weight alkyl fatty acid ester are mainly used, and such oil agents have low smoke generation. It did not satisfy the characteristics such as biodegradability or high biodegradability. On the other hand, in order to improve the heat resistance of the oil agent, for example, an oil agent using an ester compound containing a sulfur atom as a smoothing agent component has been proposed, but this one has insufficient biodegradability and poor environmental pollution resistance. It was a thing.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and is excellent in high-speed spinning property, and
An object of the present invention is to provide a yarn-forming oil agent for synthetic fibers, which has low smoke generation, high biodegradability, and good environmental pollution resistance.

[0005]

Means for Solving the Problems As a result of intensive studies to achieve the above object, the present inventor has found that squalane reduces fiber friction and also has good smoke resistance and biodegradability. The invention was reached.

That is, according to the present invention, there is provided a yarn-forming oil agent for synthetic fibers, characterized in that the main smoothing agent component is squalane.

The squalane used in the present invention may be obtained by hydrogenating natural squalane or synthetic squalane according to a conventional method, or may be synthetic squalane obtained by using a synthetic intermediate of isophytol as a raw material. Further, in the hydrogenated product of squalene, squalene in which some unsaturated bonds remain may be used as long as the iodine value is 5 or less. However, when the iodine value exceeds 5, the heat resistance is lowered, and the components are oxidized and cross-linked during the high temperature heat treatment to generate tar, which causes an increase in friction, generation of fluff, deterioration of stretchability and the like, which is preferable. Absent.

The spun oil of the present invention contains squalane as a main smoothing agent component, but other smoothing agent components may be added within the range not impairing the object of the present invention, and the amount thereof is not limited. Depending on the type of smoothing agent used,
Usually, it is 30 wt% or less, preferably 10 wt% or less, based on the total level of the smoothing agent component. Examples of the smoothing agent component preferably used in combination include ester compounds of higher alcohol and higher fatty acid or polycarboxylic acid, ester compounds of higher alcohol and higher fatty acid represented by natural oil, mineral oil and the like. Of these, natural oils such as rapeseed oil, which has good biodegradability, are preferable.

The oil agent of the present invention may further contain known oil agent components such as an emulsifier, an antistatic agent, an antioxidant and an emulsification modifier in an amount of 50 wt% or less based on the oil agent active ingredient, if necessary. . Emulsifiers preferably used are polyoxyethylene addition hydrogenated castor oil, ester nonionic surfactants such as polyoxyethylene addition sorbitan monolaurate, polyoxyethylene addition nonylphenol, ether nonionic surfactants such as polyoxyethylene oleyl ether. Examples of the antistatic agent include anion activators such as metal salts of alkyl phosphates, metal salts of alkyl sulfates and metal salts of alkyl sulfonates, and cationic activators such as quaternary ammonium salts.

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

As a preferred means for applying, there is a method in which the above-mentioned oil agent is made into an aqueous emulsion and applied through a metering oiling nozzle or an oiling roller. The amount of the oil agent applied is 0.3 to 1.5 wt%, preferably 0.3 to 1.
It is set to 0 wt%. When the applied amount is less than 0.3 wt%, smoothness is deteriorated and a sufficient effect cannot be obtained, while 1.5 w
If it exceeds t%, the excess oil agent adheres to the roller, the thread guide, etc. and causes breakage, which is not preferable.

The spinning agent of the present invention is intended for synthetic fibers. Among them, fibers produced by melt spinning such as polyester fiber and polyamide fiber are high-speed spinning,
It is particularly preferable because it is often subjected to high temperature heat treatment.

[0013]

The action and effect of the present invention The spun oil of the present invention mainly comprises squalane, which has excellent heat resistance stability and lubricity, as a main smoothing agent component. Therefore, in recent years, the fiber for industrial materials is often spun at high speed and heat-set at high temperature. It is an oil agent particularly suitable for producing polyester fibers, and has extremely good yarn-making efficiency such as low smoke generation, low scum, and low fluff (low single yarn breakage). In addition, squalane is a hydrocarbon squalene (triterpenoid) present in living organisms that is hydrogenated to substantially eliminate unsaturated bonds, so oxidative deterioration (eg tar formation) is less likely to occur even when exposed to high temperatures. However, it has good biodegradability. Therefore, the biodegradability of the waste liquid containing the spinning oil of the present invention is good,
It is characterized by excellent resistance to environmental pollution and improved safety to the human body.

[0014]

The present invention will be described below with reference to examples, but the present invention is not limited to these examples. Each evaluation item was based on the following method. Biodegradability 2 liters of 1% by weight oil emulsion and 2 grams of activated sludge for sewage treatment were placed in a 5 liter Erlenmeyer flask and degassed with air at 1 liter / minute, and then at 30 ° C. for 24 hours.
The BOD reduction rate over time was measured. The BOD is measured according to JIS K0102.21 when the BOD reduction rate is 50% or more is good (◯), and 49 to 20% is acceptable (△), 1
9% or less was judged as unacceptable (x).

Spinnability 200 yarns were sampled and the fluffs at 100,000 m were counted and integrated, and the number of fluffs per 10 ⁶ m was calculated from this. A number of fluffs of 0.2 / 10 ⁶ m or less was judged as good.

Smoke emission A 250 g load is applied to the yarn so that it is almost in contact with a vertically long (5 cm wide, 50 cm long) hot plate heater, and the cover is covered. Then, a small hole (diameter 5 mm) provided above the heater for the amount of smoke in the air rising through the slit (width 5 cm, depth 1 cm) provided between the lower part of the heater and the cover.
Exhaust at a rate of 19 liters / minute through the air, and measure with a digital dust meter (Type P-3 manufactured by Shibata Chemical Machinery Co., Ltd.),
The cumulative value for 3 minutes was defined as the smoke density (times / minute). The heater temperature was 230 ° C. The evaluation criteria are as follows. ◯: 1000 or less ◯ to Δ: 1000 to 2000 Δ: 2000 to 4000 Δ to ×: 4000 to 6000 ×: 6000 or more

[0017]

Examples 1 to 4, Comparative Examples 1 to 4 Polyethylene terephthalate having an intrinsic viscosity of 0.90 was melt-spun to form a 48 filament yarn. This thread was applied through an oiling roller so that the oil agent emulsion shown in Table 1 became 0.5% by weight as the oil agent pure content. After that, it is preheated at 90 ° C. while taking it off at a take-off roller at 600 m / min, and then heat-set at 200 ° C. while being drawn 5.0 times between the take-up roller and the drawing heat setting roller, and then cooled. Take-up via roller 250 de / 4
A drawn yarn having 8 fil and a strength of 7.7 g / d was obtained.

At this time, the drawn yarn obtained was evaluated by the above-mentioned measuring method and the results are summarized in Table 2.

[0019]

[Table 1]

As the emulsifier, polyoxyethylene hydrogenated castor oil and polyoxyethylene nonylphenol were mixed in a ratio of 1:
Used in 1.

An alkyl sulfonate Na salt was used as the antistatic agent.

[0022]

[Table 2]

Claims (1)

[Claims] 1. A yarn-forming oil agent for synthetic fibers, wherein the main smoothing agent component is squalane.