KR20040094232A - High tenacity polyester bonded yarn - Google Patents

Abstract

PURPOSE: Polyester bond yarn is characterized by having excellent strength, elongation and high tenacity, being flexible, reducing a production cost and being capable of substituting polyamide bond yarn. CONSTITUTION: High tenacity polyester bond yarn is obtained by the steps of: (1) twisting over three strings of high tenacity main polyester yarns(1)(1')(1''); (2) doubling and twisting the twisted polyester yarn with core yarn(2) for bond, followed by bonding the yarn to manufacture a first bond yarn; (3) dyeing and washing the first bond yarn; putting a softener dilute solution into a bath containing the first bond yarn; raising temperature of the bath; taking out the first bond yarn from the bath; and then washing and drying the yarn.

Description

High Tenacity Polyester Bonded Yarn

The present invention relates to a sewing thread subjected to flexible treatment after dyeing the bonded yarn made of a high-strength polyester material.

Conventional polyamide bond yarns such as nylon 6 and nylon 66 have been widely used as sewing threads for various articles including shoes and leather products because of their high strength and flexibility. However, there are some disadvantages to them, firstly, if the color is changed after dyeing or dyed with pale color (light color), yellowing may occur over time. In addition, the fastness in light (low fastness in light) may be changed color or discolored if continuously exposed to ultraviolet light for a long time after dyeing. Therefore, it has a disadvantage of poor durability compared to excellent strength. In addition, polyamide bond yarns also have problems of poor sewing due to high elongation. However, first of all, polyamide has a high burden on the companies using it because the unit price of the base material is high, and also increases the production cost of the product.

On the other hand, polyester yarns have strength comparable to that of polyamide yarns, and elongation and shrinkage have been attracting much attention from those skilled in the art as a substitute to replace polyamide bond yarns rather than polyamide yarns. Furthermore, when used as the material of the bond company, polyester yarn has the advantage that can significantly reduce the production cost compared to the polyamide bond yarn (production cost of polyamide is 60 to 300% more expensive than polyester bond yarn).

Recently, the development of a high tenacity polyester (excellent tenacity polyester) compared to the existing polyester yarns, polyester bond is expected to be able to replace the expensive nylon bond yarns.

However, although the high strength polyester yarn has an advantage of high strength, it was difficult to use as a sewing thread because of its low flexibility.

Thus, in order to solve the above problems, the present invention provides a high-strength polyester bond yarn using a high-strength polyester yarn as the main yarn of the bond yarn, and improves the flexibility of the bond yarn by performing a bath casting process during dyeing of the manufactured bond yarn. It aims at providing the manufacturing method of the high strength polyester bond company improved.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram which shows the process of twisting, combining and bonding material yarns in the manufacturing method of the high strength polyester bond yarn which concerns on one Embodiment of this invention.

Figure 2 is a schematic diagram of a dye bath casting process for the high strength polyester production method according to the present invention, after dyeing and bonding the bonded yarn bonded and bonded.

<Description of the symbols for the main parts of the drawings>

1, 1 ', 1 ": High strength polyester main yarn

2: examination for bonds

10, 10 ', 10 ": bobbin of high strength polyester main yarn

20: Bobbin of the examination for bond

30: hall

40: Combined Bobbin

According to the present invention for achieving the above object,

(1) twisting three or more high strength polyester main yarns;

(2) combining the twisted high-strength polyester main yarn with the screening for the bond, and bonding to prepare a primary bond yarn; And

(3) dyeing and washing the primary bond yarn obtained in step (2), followed by casting in a bath

Provided is a method for producing a high strength polyester bond yarn comprising a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a process of twisting, bonding and bonding material yarns in a method of manufacturing a high strength polyester bond yarn according to an embodiment of the present invention. As shown in the figure, first, main yarns 1, 1 ', 1 "based on high strength polyester are initially twisted from a plurality of bobbins 10, 10', 10". At this time, the year range of the yarn is 300 TPM to 700 TPM. In the present invention, as the high strength polyester main yarn, for example, a high strength polyester yarn having a strength of 6 g / denier or more, an elongation of 25% or less, and a shrinkage of 7% or less can be used. The thickness of each polyester main yarn is preferably 30 to 600 denier. Initially twisted high strength polyester main yarns pass through the hole (30). At this time, the bond screening 2 'twisted from the bobbin 20 is inserted in the middle of the high-strength polyester main yarns, joined together and wound on the bobbin 40. The combined year range is 200 TPM to 600 TPM. Bond screenings that can be used in the present invention include screens based on polyester or polyamide. The thickness of the examination for bonds is preferably 20 to 100 deniers.

The joined yarns are then bonded according to known thermosetting methods.

The primary bond yarn thus obtained is bath dyed, washed with water, and then casted. Hereinafter, the casting treatment process will be described in more detail with reference to FIG. 2.

Figure 2 is a schematic diagram of a dye bath casting process of casting and bonding the bonded primary bond yarns in a method for producing a high-strength polyester according to the present invention.

Dilute the softener in cold water at a ratio of 1: 2 to 1: 3 (softener: water). The softening agent that can be used in the present invention is a softening agent for sewing, which is mainly composed of silicone and hydrocarbon, and can be selected and used by those skilled in the art based on common knowledge. The softener dilution solution is administered at a rate of 5 to 15% (by wet fiber weight) in the bath containing the washed primary bond yarn after dyeing. At this time, the temperature of the bathtub is about 15 to 40 ℃. The temperature of the bath is then gradually raised to 70 ° C. at a rate of 1 to 2 ° C. per minute (30 to 60 minutes). When the temperature of the bath reaches 70 ° C., the temperature is maintained for 10 to 20 minutes. Thereafter, the bonded yarn is washed with water and dried to obtain a high strength polyester bonded yarn according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the following examples. The following examples are intended to illustrate the invention and do not limit the invention in any way.

Example 1

Preparation of high strength polyester bond company

A high strength polyester main yarn (polyester F. yarn, 200 denier, 96 filament, type: brt) supplied from three strands of Hyosung Co., Ltd. was initially twisted at about 590 TPM. Bond screening and bonding at 440 TPM were bonded by the thermosetting method to obtain a primary bond yarn. Subsequently, the obtained primary bond yarn was dyed black by a bath dyeing method and washed with water to remove the remaining dye.

Softener was diluted in water at a ratio of 1: 2. The dilution was treated in a bath containing washed bond yarns. Subsequently, the bath yarn bonded yarn is washed and dried to obtain a high strength polyester bond yarn.

Property inspection of high strength polyester bond yarn

Investigate the thickness, strength, elongation, stiffness, and coefficient of friction of the high strength polyester bond yarns prepared previously, and the black nylon 6 bond yarns made by the existing three main yarns (Hyosung Co., Ltd., Toplon (trade name), 210 Denier, 24 filament, type: brt) and nylon 66 bond yarn (manufactured by Hyosung Co., Ltd., 210 denier, 34 filament, type: brt). The thickness, strength, elongation, stiffness, coefficient of friction, and the like were determined according to the following method.

Yarn count (denier): ASTM D 1907-1997

Yarn strength (gf): ASTM D2256-1997

Elongation at Break (%): ASTM D 2256-1997

Stiffness (tenacity, gf / denier): ASTM D 2256-1997

Coefficeient of Friction: ASTM D 3108-1995

The values obtained according to the method described above are presented in Table 1 below.

Kind of bond company Thickness (denier) Strength (gf) Elongation at Break (%) Stiffness (denier) Coefficient of friction Primary bond yarn of Example 1 215.7 x 3 4369.2 21.0 6.8 0.26 Bond Yarn Treated in Example 1 237.3 x 3 4239.7 24.0 6.0 0.17 Nylon 6 Bond Yarn 229.0x3 4170.4 30.6 6.1 0.14 Nylon 66 Bond Company 234.4 x 3 4843.1 28.7 6.7 0.14

As can be seen in Table 1, when the primary bond yarn prepared by combining the high-strength polyester main yarn with the bond screening and thermosetting bonding according to the present invention, after dyeing and softening treatment, conventional nylon 6 bond yarn High strength polyester bond yarns with better or similar elongation and strength to nylon 66 bond yarns and improved flexibility can be produced. In particular, the improvement in the coefficient of friction of high strength polyester bond yarns from 0.26 to 0.17 before and after softener treatment demonstrates that the high strength polyester bond yarns produced according to the present invention have useful flexibility as sewing thread.

As described above, according to the manufacturing method of the high-strength polyester bond company of the present invention, it is excellent in strength and elongation and flexible to replace the existing polyamide bond yarn, high-strength polyester that can be produced at a low production cost Bond company can be obtained.

Claims (9)

(1) twisting three or more high strength polyester main yarns; (2) combining the twisted high-strength polyester yarn with the examination for the bond, and bonding to prepare a primary bond yarn; And (3) step of dyeing the primary bond yarn obtained in step (2), followed by casting in a bath Method for producing a high strength polyester bond company comprising a. The method of claim 1, wherein the year of the yarn in step (1) ranges from 300 TPM to 700 TPM. The method according to claim 1, wherein the combined year range in step (2) is 200 TPM to 600 TPM. The method according to claim 1, wherein the thickness of the high strength polyester main yarn is 30 to 600 denier, and the thickness of the screening for bond is 20 to 100 denier. The bath casting process of claim 1, wherein the bath casting treatment of step (3) is diluted with water, the resulting softener dilution solution is administered to a bath containing primary bond yarn washed with dye, and the temperature of the bath is gradually raised, Removing the bond yarn from the bath after time and washing with water and drying. 6. The method of claim 5, wherein the softener diluent is administered to the bath at a rate of 5-15% (based on the wet fiber weight). The method of claim 5, wherein the temperature of the bath at the time of administering the softener is 15 to 40 ° C., and after the softener is administered, the temperature of the bath is gradually raised to 70 ° C. at a rate of 1 to 2 ° C. per minute. The method of claim 7, wherein the bath temperature of 70 ° C. is maintained for 10 to 20 minutes. A high strength polyester bond yarn prepared by the process according to claim 1.