KR101230637B1 - Marine finish polyester yarn - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to marine yarns for use in anchoring of oil drilling vessels for oilfield development in deep seas, and more particularly to marine polyester yarns surface-treated with polysiloxane compounds on polyester fibers.

The marine polyester yarn of the present invention can be conveniently used with a significantly reduced weight compared to the conventional wire rope, and at the same time, it is used for a long time without the occurrence of partial cutting by minimizing the generation of frictional heat due to the change of the external environment with excellent wear resistance. This is possible.

Marine Yarn, Polyester, Polysiloxane, Wear Resistance

Description

Marine polyester yarn {MARINE FINISH POLYESTER YARN}

The present invention relates to a marine polyester yarn for use in anchoring of oil rigs for deep field oilfield development.

In general, marine yarns are mainly used for anchoring oil drilling rigs for deep-field oil development.

Previously, wire ropes were used a lot, which was a problem because they were installed in deep seas with a depth of more than 2000 m, because the weight of the rope had a lot of disadvantages.

In order to improve this problem, high strength, excellent shape stability and relatively light fiber rope is replacing wire rope.

However, in the case of a fiber rope, partial cutting may occur when friction heat is generated due to external environmental change, and a complete cutting may occur when used for a long time, resulting in a dangerous situation.

Therefore, there is a need for research on the development of marine fiber yarns that can give excellent wear resistance to the yarns so that the products can be used for a long time by minimizing the generation of frictional heat due to external environmental changes.

The present invention seeks to provide a marine polyester yarn having excellent wear resistance.

The present invention provides a polyester yarn for marine surface treatment on the polyester fiber with a polysiloxane compound of the formula

[Formula 1]

Expression ^{of, R 1, R 2, R} 3, R 4, R 5, R 6, and R ⁷ are the same or different and each is hydrogen, C ₁ ~ C ₂₀ alkyl group, or C ₁ ~ C ₂₀ aryl group ego,

n is an integer of 1-5,000.

Hereinafter, the present invention will be described in more detail.

The present invention is characterized in that the surface treatment with a polysiloxane compound of the formula (1) to the polyester fiber in order to develop a marine yarn excellent in wear resistance. In particular, the polysiloxane compound has an effect of maximizing surface lubricity through physical or chemical bonding to the polyester surface.

The term 'polyester fiber' in the present invention generally refers to a fibrous polymer that is esterified by reacting with a dicarboxylic acid such as a diol compound and terephthalic acid, and is a basic fiber for producing the 'marine polyester yarn' of the present invention. Corresponds to the composition. Polyesters are particularly preferred for the production of fiber ropes which have excellent resistance to moisture and thus replace marine wire ropes.

As the polyester fiber in the present invention, any commonly used polyester fibers can be used. Examples of the polyester fiber include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT) , Polyalkylene terephthalate such as hexanedimethylene terephthalate (PCT), or copolyester having a main constituent component thereof. In particular, polyethylene terephthalate is more preferable for use as a marine yarn in terms of physical properties such as strength and elongation.

The polyester fiber may have an intrinsic viscosity of 0.8 to 1.20 dl / g, preferably 0.90 to 1.05 dl / g, it is preferable to have an intrinsic viscosity of the above range in terms of high strength.

In addition, the present invention can be used in combination with one or two or more polysiloxane compounds represented by the formula (1), the number average molecular weight of 10 to 1,000,000, preferably 50 to 100,000 more preferably 500 to 50,000 polysiloxane compound Can be used. In addition, the polysiloxane compound may be 5 to 35,000 cst, preferably 50 to 5,000 cst, more preferably 100 to 500 cst in the viscosity range corresponding to the molecular weight. In view of the lubricating effect of marine yarns, it is preferable to use a polysiloxane compound having a number average molecular weight of 1,000 or more or a viscosity of 100 cst or more, and in view of the fact that the viscosity of the polysiloxane compound increases and the rate of diffusion penetration into the fiber surface is reduced, It is preferable to use below 50,000, or below 500 cst of viscosity.

The number average molecular weight of the polysiloxane compound may be measured by gel permeation chromatography (GPC) in the instrument analysis method, the viscosity is a Canon viscosity (Cannon-Fenske Type Viscometer) by dynamic viscosity measurement method ) Can be measured using.

The polysiloxane compound may also be those having a specific gravity of 0.950 to 1.000 at room temperature (25 ℃).

In particular, in one preferred embodiment, the polysiloxane compound may be used in which at least one of the substituents R ⁴ or R ⁵ in the general formula (1) is alkyl having 1 to 4 carbon atoms, for example, in the group consisting of polyalkylsiloxane and polyalkylarylsiloxane One or more selected species may be used. More preferably, it may be at least one selected from the group consisting of polydimethylsiloxane, polydibutylsiloxane, and polymethylphenylsiloxane, and it is more preferable to use polydimethylsiloxane in terms of the final yarn quality. Polydimethylsiloxane and the like are relatively stable to chemically and thermally different reactions and modifications, and in particular, because the alkyl group has a hydrocarbon shorter than the others, it has excellent lubricating properties on the surface of marine yarns.

In the present invention, the polysiloxane compound may be surface treated to 0.3 to 2.0% by weight, preferably 0.5 to 1.5% by weight, more preferably 0.6 to 1.1% by weight, based on the weight of the polyester fiber. It is preferable to surface-treat it to 0.5 weight% or more with respect to ester fiber weight, and to surface-treat it to 2.0 weight% or less from an economical viewpoint.

In addition, the marine polyester yarn of the present invention can be produced through a conventional melting, spinning, stretching process, except that it further comprises the step of surface treatment of the polyester fiber with the polysiloxane compound of the formula (1). .

1 is a process diagram schematically showing a process for producing a polyester yarn of the present invention. In particular, as shown in FIG. 1 as a preferred example, the marine polyester yarn of the present invention cools the molten polymer spun through the detention 110 with quenching-air, and an emulsion roll or oil-jet ( Oil-roll or oil-jet (120) is used to emulsify the undrawn yarn, and pre-interlacer (130) is used to apply the oil applied to the undrawn yarn at a constant air pressure to the surface of the yarn. Disperse evenly. Then, after the stretching process through the multi-stretching apparatus (141 ~ 146), and finally by the second interlacer (2 ^nd Interlacer, 150) by interlacing the yarn at a constant pressure (winding in the winding machine 160) Can be made into yarn.

In the present invention, the polysiloxane compound may be applied by additionally installing a separate device, or may be surface treated to the polyester fiber by using an existing emulsion roll or oil-jet 120 device as shown in FIG. 1.

Meanwhile, in order to be used as a marine fiber yarn, the polyester yarn surface-treated with the polysiloxane compound of Chemical Formula 1 according to the present invention measures a yarn-on-yarn abrasion load of 0.34 to 0.45 g / d) it shall have abrasion resistance of at least 5,000 cuts, ie not cut up to 5,000 cuts, when rubbing the yarns with the yarn. In particular, the wear resistance is preferably maintained at least 7,000 times in dry conditions, 9,000 or more in wet conditions. If the yarn does not maintain more than 7,000 and 9,000, respectively, in the dry and wet conditions as a result of the wear resistance measurement, even when used as a marine rope may cause partial cutting due to frictional force due to changes in the external environment, etc. It may be.

In addition, the yarn-to-yarn wear resistance measurement results are preferably maintained as many times as possible in consideration of safety when using the marine rope, etc., it is preferable to have excellent performance, usually maintained at 7,000 to 18,000 circuits in dry conditions and wet conditions 9,000 to 20,000 circuits can be maintained.

In a preferred embodiment of the present invention, the yarn-to-yarn yarn-on-yarn abrasion measurement can be performed using an apparatus as shown in Fig. In the measuring device, the load 230 (tension weight) moves up and down through the pulleys 221 to 222 in one rotation of the crank 210 and the crank using the gear motor 240, and at this time, the yarn about the pulley 223 The number of rubbings between the yarns is recorded as it moves. In addition, wear resistance in dry conditions can be measured at a relative humidity of 55 to 75% and 16 to 25 ℃, wear resistance in wet conditions after soaking in water at 16 to 25 ℃ so that the yarn to be measured is sufficiently wetted, for example For example, after being immersed in a water bath or the like for about 1 hour or more, the wear resistance between the yarn and the yarn can be measured using the apparatus.

In the present invention, matters other than those described above can be added or subtracted as required, and therefore, the present invention is not particularly limited thereto.

According to the present invention, surface treatment of a specific polysiloxane compound on a polyester fiber minimizes the generation of frictional heat due to the change of the external environment due to its excellent wear resistance, so that no partial cutting occurs even when used as a marine fiber rope, etc. Can be used effectively.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

Example 1

A polyester solid-state polymerization chip containing an intrinsic viscosity of 1.05 g / dL and 90 wt% or more of polyethylene terephthalate was melted at a temperature of 280 ° C. or higher to discharge molten polyester through spinneret. The discharged molten polyester is delayed quenched in a hood-heater temperature section of 300 ° C., and an emulsion roll is applied to the delayed quenched polyester fiber to polydimethylsiloxane (number average molecular weight 10,000, viscosity 350 cst). Surface treatment. At this time, the polydimethylsiloxane was surface treated to 0.3% by weight based on the weight of the polyester fiber.

The surface-treated polyester fibers were passed through a pre-interlacer and stretched using a Godet roller under conditions of a spinning speed of 500 m / min, a draw ratio of 5.6 times, a relaxation rate of 2.0%, and a heat treatment temperature of 220 ° C.

After the stretching, using a two-stage interlacer, the stretched polyester yarn was imparted with an air pressure of 3.0 kg / cm ² , and wound up with a winder to prepare a marine polyester yarn.

Example 2

A marine polyester yarn was prepared in the same manner as in Example 1, except that the polydimethylsiloxane was surface treated in an amount of 0.6% by weight based on the weight of the polyester fiber.

Example 3

A marine polyester yarn was prepared in the same manner as in Example 1, except that the polydimethylsiloxane was surface treated in an amount of 0.9% by weight based on the weight of the polyester fiber.

Example 4

A marine polyester yarn was prepared in the same manner as in Example 1, except that a polydibutylsiloxane compound (number average molecular weight 12,000, viscosity 400 cst) was used instead of the polydimethylsiloxane.

Comparative Example 1

A polyester yarn was prepared by performing the same method as Example 1 except that the surface of the quenched polyester fiber was treated with mineral oil instead of the polydimethylsiloxane.

Comparative Example 2

A polyester yarn was prepared by performing the same method as Example 1, except that the quenched polyester fiber was surface treated using ethylene oxide addition diol ester instead of polydimethylsiloxane.

In the present invention, the physical properties of the polyester yarn was evaluated by the following method.

Yarn-to-yarn wear resistance rating:

As shown in FIG. 2, when the load moves up and down during one rotation of the crank, and the yarn moves, the result of measuring the number of times of rubbing between the yarns is recorded. For each yarn, wear resistance at dry and wet conditions was measured, and the dry conditions were subjected to abrasion resistance test after drying at relative humidity of 55-75% and 16-25 ° C. for about 1 hour. In the wet conditions, the yarn was sufficiently immersed in a water bath of 16 to 25 ° C. for at least 1 hour, and the yarn resistance test was performed while the yarn was sufficiently wet with water.

The physical properties of the polyester yarns prepared according to Examples 1 to 4 and Comparative Examples 1 and 2 (applied with a load of 700 g to 2,000 De yarns) are shown in Table 1 below.

[Table 1]

division Surface Treatment Ingredients Surface treatment
(wt%) Wear resistance measurement results (times) Dry condition Wet conditions Example 1 Polydimethylsiloxane 0.3 7100 5123 Example 2 Polydimethylsiloxane 0.6 10324 9120 Example 3 Polydimethylsiloxane 0.9 12352 11245 Example 4 Polydibutylsiloxane 0.9 10235 9005 Comparative Example 1 Mineral oil 0.9 4210 3258 Comparative Example 2 Ethylene oxide addition
Diol ester 0.9 4100 3000

In addition, in the case of Example 1 and Comparative Example 1, the wear resistance test results are shown in Figure 3a and 3b, respectively.

As shown in Table 1, the polyester yarn of Examples 1 to 4 surface-treated with the polysiloxane compound of Formula 1 according to the present invention, the polyester of Comparative Example 1 surface-treated with mineral oil which is a conventional fiber treatment emulsion It can be seen that the wear resistance is at least 1.2 times higher than that of the yarn. In particular, in the case of a polyester yarn not subjected to any surface treatment, it can be seen that surface lubricity is poor and wear resistance is remarkably inferior.

In addition, as can be seen with the naked eye from the photographs of FIGS. 3A and 3B, it was confirmed that the polyester yarn of Example 3 surface-treated with polydimethylsiloxane according to the present invention had excellent surface lubricity and excellent wear resistance. Could.

The present invention can provide a marine polyester yarn having excellent abrasion resistance by surface treating a specific polysiloxane compound on a polyester fiber. In particular, the marine polyester yarn according to the present invention can be conveniently used as a fiber rope of a significantly reduced weight compared to the conventional wire rope, and at the same time with excellent wear resistance to minimize the generation of frictional heat caused by changes in the external environment, such as part cutting It can be used for a long time without the occurrence of.

1 is a process diagram schematically showing a marine polyester yarn manufacturing process according to an embodiment of the present invention.

Figure 2 is a schematic diagram showing an apparatus for measuring yarn-on-yarn abrasion in accordance with an embodiment of the present invention.

Figure 3a and Figure 3b is a photograph showing the wear resistance measurement results of the polyester yarn prepared according to Example 1 and Comparative Example 1 of the present invention, respectively.

Claims (8)

Marine polyester yarns surface-treated with a polysiloxane compound of formula 1 to the polyester fiber: [Formula 1]

Wherein, Aryl group of ^{R 1, R 2, R 3} , R 4, R 5, R 6, and R ⁷ are the same or different and each is hydrogen, C ₁ ~ C ₂₀ alkyl group, or C ₁ ~ C ₂₀ of and, n is an integer from 1 to 5,000. The method of claim 1, The polysiloxane compound is a marine polyester yarn having a viscosity of 5 to 35,000 cst. The method of claim 1, The polysiloxane compound is at least one marine polyester yarn selected from the group consisting of polydialkylsiloxane and polyalkylarylsiloxane having 1 to 4 carbon atoms. The method of claim 3, The polysiloxane compound is at least one marine polyester yarn selected from the group consisting of polydimethylsiloxane, polydibutylsiloxane, and polymethylphenylsiloxane. The method of claim 1, The polyester fiber has an intrinsic viscosity of 0.8 to 1.20 dl / g polyester polyester for marine. The method of claim 1, The polyester fiber is a marine polyester yarn selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polycyclohexanedimethylene terephthalate, and copolyesters thereof. The method of claim 1, The polysiloxane compound is a surface-treated polyester yarn to be 0.3 to 2.0% by weight based on the polyester fiber weight. The method of claim 1, A marine polyester yarn having abrasion resistance that is cut at 5,000 times or more when the yarn is rubbed with a load of 0.34 to 0.45 g / d.

Images