JPS62149932A - Production of warp yarn beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of manufacturing a warp beam by drawing and warping relatively thin polyester yarn having a single filament fineness.

(Prior Art) In recent years, there has been a trend in demand for woven and knitted fabrics using polyester yarns with fine single filament fineness because they provide unprecedented texture and properties such as fashionability and functionality.

On the other hand, in the conventional weaving and knitting industry, a warp sheet containing hundreds or thousands of multifilament yarns drawn in advance is wound around a beam through a warping process, and then unwound from the beam and used for warp braiding on a loom. It supplies machines and other products.

In recent years, a take-up speed of 250 has been adopted as a rational warp manufacturing method.
Polyester yarn spun at 0-4500?7Z/min,
A stretching and warping machine that warps while stretching was invented (Japanese Patent Application Laid-Open No. 6
No. 0-99037) and is commercially available (eg, Drawer Bing Machine manufactured by KARL iAYER, West Germany).

This stretching warping method is a conventional method, for example.

A. Spinning → drawing → warping B. Spinning and drawing → Warping C0 ultra high speed spinning → Warping It has the following advantages compared to:

Strength and elongation properties are improved.

Good stainability.

The frequency of filament breakage and thread breakage is greatly reduced, improving warping efficiency.

The biggest advantage is that the quality of woven and knitted fabrics related to warp muscles is improved.

(Problems to be solved by the present invention) Single yarn fineness], fineness yarns with a fineness of 5 denier or less have some problems in manufacturing, and even if careful management is carried out, problems will occur during manufacturing and quality. There are many.

First of all, since the spinning discharge amount is relatively 1c less, the residence time in the extruder, polymer piping, and nozzle pack becomes longer, causing thermal decomposition of the polymer, resulting in uneven polymer quality, and the polymer discharged from the nozzle. This is because when a cooling air flow is applied to the air, it is easily affected by turbulence in the air flow and spots caused by sleep.

For this reason (C stretching and sizing after the spinning process.

In the warping process, guides, pins, travelers, etc. give preferential treatment to yarns, which can reduce strength and easily break single yarns.In addition, the temperature of each heating section of the drawing weight used and the contact of yarns with heating sections Differences in heat history and abrasion rate due to variations in degree can easily lead to thread unevenness.

In particular, this tendency is even more remarkable for fine-grained yarns with a single yarn fineness of 0.7 denier or less.

(Means for Solving the Problem) The present inventors prepared a homogeneous warp without manufacturing trouble when using polyester yarn with a single yarn fineness of 1.5 denier or less as the warp of a woven or knitted product. The present invention was developed as a result of extensive research into a method for producing woven or knitted fabrics of unprecedented quality.

The present invention has the following configuration.

That is, the gist is a method for producing a warp beam, which is characterized in that polyester yarn spun at a take-up speed of 2,500 to 4,500 m/min is drawn and warped to form a warp with a single filament fineness of 1.5 denier or less. be.

Here, in order to avoid changes in yarn quality over time, it is necessary to set the take-up speed in the spinning process to 2500 to 4500 m/min to obtain highly oriented yarn. however.

If it exceeds 4,500 m15+, the take-up tension due to air resistance increases and yarn breakage is likely to occur, making it disadvantageous to spin polyester yarn with a single yarn fineness of 1.5 denier or less.

By drawing and warping relatively thin monofilament polyester yarn taken at a take-up speed of 2,500 to 4,500 m/min, it is possible to eliminate the need for a traveler, eliminate excessive winding, and separate heating sections for each heating section. Strict temperature control is possible with a single temperature control system, allowing for drawing and heat treatment under mild conditions, and the thread can be threaded through guides and pins without strain, making it possible to obtain a warp beam without damaging the filament. Compared to conventional methods, there are fewer problems such as thread cutting and fuzzing during weaving.

This results in extremely low amounts of woven and knitted fabrics, which are of unprecedented quality. It is particularly effective for polyester woven and knitted fabrics with a high warp density and a single yarn fineness of 0°7 denier or less.

The polyester referred to in the present invention mainly refers to polyethylene terephthalate produced from terephthalic acid and ethylene glycol.
15 with dicarboxylic acids such as sodium sulfoisophthalate
You can replace ethylene glycol with tetramethylene glycol or neopentyl glycol if it is about % (mol).

It may be replaced with a glycol such as 1,4-cyclohexane dimetatool in an amount of about 15 moles.

Further, in addition to the polyester, color pigments, various stabilizers, or other melt-spun polymers may be mixed and used to the extent that the quality of the polyester yarn is not impaired.

The method of the invention will now be described further in FIG.

FIG. 1 shows an example applied to a drawing and warping machine, in which a multifilament 2 released from a bobbin 1 wound with polyester yarn spun at high speed using a predetermined method is sent to a dropper 3. Input roller group via eye lead 4]2. It is stretched between a group of output rollers 130. Note that 14 is a stretching pin, and 15 is a heat plate.

Multifilament 2 coming out of output roller group 13
The yarn passes through the warp threads 16 and 1.7 and is wound onto the warp beam 5. Note that although this FIG. 1 is a conceptual diagram of the drawing and warping machine viewed from the side, a plurality of multifilaments 2 are also lined up horizontally.

(Examples) The present invention will be further explained with reference to Examples, but the present invention is not limited to these in any way.

Production Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.69 measured in an equal weight mixture of phenol and tetrachloroethane was prepared using a nozzle having a diameter of 0.15 mm and 168 holes.

A highly oriented undrawn yarn was produced according to a conventional method at a spinning temperature of 95° C. and a winding speed of 3500 m/min.

Production Example 2 The same procedure as Production Example 1 was carried out except that a nozzle with a diameter of 0.25 tranφ and 72 holes was used.

Example 1 Highly oriented undrawn yarn produced in Production Example 1 (birefringence 52
X 1σ3) Using 69 denier 168 filament,
Karl Mayer stretching and warping machine (Fig. 1 ((equipment shown)
Warping speed: 550 m/';j, stretching ratio: 1.30
Stretching and warping was carried out under the following conditions.

The occurrence of fuzz was good at 0.15 pieces/10 m.

The results of the warp test of fabrics woven and dyed according to conventional methods showed that WO-W2, which has both product values, was in the 100 range, and WO with no warp warp abnormalities accounted for 80%.

Below, W1 accounted for 1.4% and W2 accounted for 6 units.

However, each strand was inspected 50 times in 50m increments.

Example 2 Highly oriented undrawn yarn produced in Production Example 2 (birefringence 44X
10) The same procedure as in Example 1 was carried out except that 99 denier 72 filament was used.

The occurrence of fuzz was good at 0.008 pieces/10m.

In addition, the fabric's warp test results show that WO is 92% and Wl is 6.
Chi, W2 was 2 chi.

Comparative Example 1 The highly oriented undrawn yarn produced in Production Example 1 was drawn with a normal drawing machine at a drawing speed of 650yy+/min and a drawing ratio of 1.30, and then at a warping speed of 550? ? Warping was carried out at l/min.

The occurrence of fuzz was 1.55 pieces/10m, which was poor.

The results of the warp-stripe inspection of the fabrics, which were woven and dyed according to the conventional method as in the examples, showed that 4 out of 7 were 0 rolls with no commercial value, and the others were W2 with fairly noticeable warp grains.

Comparative Example 2 The same procedure as Comparative Example 1 was carried out except that the highly oriented undrawn yarn produced in Production Example 2 was used.

The number of fluffs generated was 1628/]06m, which was poor.

In addition, the results of the warp test of the fabric showed that 1 out of 8 fabrics was 0 fabric.

3rd round was W2 and 4th round was Wl.

(Effects of the Invention) As shown in Examples 9, by the method of the present invention, warp beams capable of producing polyester woven and knitted fabrics with a single yarn fineness of 1.5 denier or less without any problems during production or quality were manufactured. It is possible to do so.

[Brief explanation of drawings]

FIG. 1 shows a conceptual side view of a drawing warper. In the figure, 1: bobbin, 12: impnotroller. 13 Near-dot roller, 14: Stretching pin. 15: heat plate, 16, 17: reed, 5: warp beam.

Claims (2)

[Claims] (1) A method for manufacturing a warp beam, which comprises drawing and warping polyester yarn spun at a take-up speed of 2,500 to 4,500 m/min to form a warp having a single yarn fineness of 1.5 denier or less. (2) Polyester yarn is drawn and warped to have a single yarn fineness of 0.7
The method for manufacturing a warp beam according to claim 1, wherein the warp is of a denier or less.