JP2745638B2 - ribbon - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a novel polyester filament yarn ribbon having a soft texture similar to an acetate ribbon.

[Prior art] Conventionally, acetate fibers have been mainly used as a material for ribbons, but ribbons made of polyester fibers are required in order to reduce costs as much as possible because of the disposable field. Came out. However, ribbons made of polyester fiber have a stiff texture, are difficult to tie, and are easy to loosen.

[Problems to be solved by the invention] The present inventors. As a result of intensive studies on an excellent ribbon having a soft texture without the above-mentioned disadvantages, the following invention was reached. An object of the present invention is to provide a ribbon using a polyester filament yarn that has a soft texture, is easy to tie, and is difficult to unwind.

[Means for Solving the Problems] That is, the present invention is a filament comprising a fiber-forming polyester containing ethylene terephthalate as a main repeating unit, and has a birefringence (Δn): 0.07 to 0.12 density (g / cm ³ ) : 1.36 to 1.40 Single yarn fineness (d): 0.1 to 6.0 Total fineness (D): 30 to 300
Or, it is a ribbon woven using either the vertical or horizontal orientation.

In the above ribbon, the woven fabric density is in the range of 90 to 240 yarns / in width: 45 to 95 yarns / in, and the bending rigidity value (B) by KESFB-2 is
B (gf · cm ² / cm): 1 × 10 ^{−3 to} 150 × 10 ⁻³ is satisfied, and the bending hysteresis width (2HB) is 2HB (gf · cm / cm): 1
× is preferably a ribbon that satisfies the 10 ^-3 ~100 × 10 ^-3.

The polymer used in the present invention is 100% polyester
In addition, a so-called modified polyester containing a third component may be used. In short, a fiber-forming polyester mainly composed of polyethylene terephthalate may be used.

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

Conventionally, acetate fibers having a soft texture have been favored by consumers and mainly used as ribbon materials.
However, since the ribbon is a disposable field, a ribbon using polyester fiber has been required for cost reduction. However, a ribbon made of polyester fiber has a rigid texture, so it is difficult to tie the knot and the knot is easily released.

The present inventors have proposed that the polyester fiber has a birefringence (Δn) of 0.07 in order to improve the texture, which is the above problem.
It was found that the density (g / cm ³ ) should be in the range of 1.36 to 1.40.

Here, when the birefringence is 0.07 or less and the density is 1.36 or less, the strength is low and weaving is impossible. The birefringence is 0.12
If the density is higher and the density is higher than 1.40, the orientation proceeds too much, the texture becomes hard, and a soft texture cannot be obtained. In particular, the effect is further exhibited when the single-fiber fineness is 0.1 to 6.0 denier and the total fineness is 30 to 300 denier.

In order to obtain a polyester fiber having a birefringence of 0.07 to 0.12 and a density of 1.36 to 1.40, for example, melt spinning a formable polyester containing ethylene terephthalate as a main repeating unit at a spinning speed of 2500 m / min to 4500 m / min. Partially oriented Yarn (hereinafter referred to as POY) (hereinafter referred to as POY) can be produced by heat treatment under low elongation.

The processing conditions are not particularly limited, but they are stretched at an elongation of 1% to 12% which is equal to or lower than the yield point elongation. The heat treatment is preferably carried out at a temperature higher than the crystallization temperature and lower than the softening point, that is, at 140 to 220 ° C. for dry heat and 100 to 180 ° C. for wet heat.

The POY obtained under the above conditions is designed in the range of 90-240 lines / in woven fabric density, 45-95 lines / in, and the bending properties of the woven ribbon are determined by KESFB-2. The bending stiffness (B: gf · cm ² / cm) is 1 × 10 ^{−3 to} 150 × 10 ^−3, and the width of bending hysteresis (2H
B: gf · cm / cm) is a flexible and resilient woven fabric within a range of 1 × 10 ^{−3 to} 100 × 10 ⁻³ .

KESFB-2 is a pure bending tester manufactured by Kato Tech Co., Ltd. and has a curvature (cm ^-1 ) of 2.5 to -2.5 for a sample having a width of 1 cm and a length of 20 cm under the conditions of room temperature and humidity of 20 ° C. × 65 RH. To determine the bending moment (gf · cm / cm).

The ribbon woven using the polyester filament yarn of the present invention has a greatly improved dye exhaustion rate, high dyeability,
It has low-temperature dyeability and good light fastness.

The polyester filament system used in the ribbon of the present invention tends to have low strength and high elongation, but can withstand weaving. However, because of low strength and high elongation, it is preferable to slightly lower the action in each step leading to weaving.

[Example] Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.64 was added to 3150
The yarn was spun at m / min to obtain an undrawn yarn having a Δn of 0.038 and 85 denier / 48 filaments, which was continuously subjected to a low elongation heat treatment while being kept in contact with a hot plate for 0.4 seconds, and wound. At this time, the temperature of the hot plate is 140 ° C. and the elongation is 1.5%.

The polyester filament yarn processed as described above (birefringence 0.085, density 1.380) was used to obtain a total denier length of 80D and a width of 160D.
Tussah-like plain woven fabric with book / in and width of 67 / in was woven.

The bending properties of the yarn obtained by subjecting the POY to low elongation heat treatment as described above and the untreated drawn yarn (birefringence 0.170, density 1.380, total denier length 75D, width 150D) were examined. As a result, the untreated drawn yarn has a bending stiffness B value of 0.194 (gf · cm ² / c
m), the value of the bending hysteresis width 2HB is 0.111 (gf · cm /
cm), whereas the B value of the ribbon of the present invention is 0.027.
(Gf · cm ² / cm), 2HB value is 0.021 (gf · cm / cm),
Compared to the former, it had a soft texture that was much softer and more resilient.

[Effects of the Invention] The ribbon of the present invention, having the above configuration, is flexible and soft, so it is easy to tie, it is difficult to loosen the knot, and the rebound is high, so even if it is soft,
It has an excellent effect that it can maintain a tight shape.

Claims (2)

(57) [Claims] 1. A filament made of a fiber-forming polyester containing ethylene terephthalate as a main repeating unit. Birefringence (Δn): 0.07 to 0.12 Density (g / cm ³ ): 1.36 to 1.40 Single yarn fineness (d ): 0.1 to 6.0 Total fineness (D): Polyester filaments obtained by blending filaments satisfying 30 to 300, either alone or in combination, are woven using both length and width, or both length and width. A ribbon characterized in that: 2. The finished density of the woven fabric is in the range of 90 to 240 yarns / in width: 45 to 95 yarns / in, and the flexural rigidity (B) according to KESFB-2 is B (gf · cm ² / cm): 1 × 10 ^{-3 to} 150 × 10 ^-3 and the bending hysteresis width (2HB): 2HB (gf · cm / cm): 1 × 10 ^{-3 to} 100 × 10 ^-3 The ribbon according to claim 1, wherein: