KR950004074B1 - Manufacturing methdo and device of different contraction mixing yarn for polyester - Google Patents

Abstract

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Description

Manufacturing method and apparatus for polyester biaxial blend fiber

1 is a manufacturing process diagram of a conventional biaxial blended yarn

2 is a manufacturing process diagram of the biaxial horn fiber yarn of the present invention

3 is a detailed view after the second high roller of the present invention.

4 is a detailed view of portion A of the present invention.

* Explanation of symbols for the main parts of the drawings

1,1 ': detention 2,2': QUANCHING CHAMBER

3: heating tube 4: first high speed roller (lG / R)

5: heating tube 6: second high speed roller (2G / R)

7: Separator Roller (S / R) 8: Plywood Guide

9: INTERLACER 10,10 ': winding package

11: feeding roller l2: hot plate

13: guide 14: extension bobbin

15: winder

The present invention relates to a method and apparatus for producing a polyester biaxially blended yarn by high speed spinning having a spinning speed of 5,000 m / min or more.

In general, the polyester bishrink blended yarn may exhibit a good touch when used in a variety of fabrics, such that the demand is gradually increasing. The process for producing such a polyester biaxially blended yarn is generally the same as that in FIG.

Referring to this manufacturing method according to the accompanying drawings, first, each of the polyester fibers having a different spinning speed is produced. At this time, the polyester fiber is undrawn yarn. The shrinkage rate of polyester fiber produced by varying the spinning speed is different because the shrinkage rate of the fiber is generally determined by the crystal size, crystallinity, and the molecular chain of the fiber, and the various factors are related to the spinning speed of the fiber. Because it is very large.

At this time, the reason for producing the undrawn yarn is because it is easy to express the difference in shrinkage rate, and also the reason for manufacturing by lowering the spinning speed is also to effectively express the difference in shrinkage rate. This is because if the spinning speed is increased to increase the crystal size and crystallinity of the fiber during manufacture, it is difficult to express the difference in shrinkage rate.

In this way, by producing a non-stretched polyester having a different shrinkage rate by varying the spinning rate, a winding package of 10, 10 'is prepared, respectively.

The winding packages 10 and l0 'thus manufactured are spun in the joint guide (8), and then the feed roller 11 is heat-treated in the rod and the soft plate 12 (the reason for the soft treatment is for stretching while stabilizing the properties of the unstretched yarn). In other words, in order to improve the stretchability, the film is stretched and wound around the bobbin 14 in the first G / R (4) and the second G / R (6) for stabilization of physical properties.

In this way, the method of manufacturing the polyester biaxially blended yarn is long because the process consists of two steps of manufacturing two kinds of polyester non-drawn yarn having different shrinkage ratios, and pulverizing and stretching them. There was a difficulty, and because it was manufactured at a low spinning speed, there was a difficulty in improving productivity.

therefore. The present inventors have made efforts to solve the above problems, and as a result, the conventional two-stage is made into one stage and the spinning speed is also high to develop a method for producing polyester bishrink blended yarn with excellent productivity and excellent process passability. .

That is, the method of manufacturing the polyester bishrink blended yarn according to the present invention uses a heating tube capable of varying the heat treatment during the stretching heat treatment of the multifilament produced by the high-speed spinning, and the bishrink blended yarn due to the difference in stretchability To prepare.

Hereinafter, the present description will be described in detail.

In the present invention, the intrinsic viscosity is 0.63 to 0.67, and 90 mol% or more of the entire molecular chain is spun at a high speed of at least 5,000 m / min after spinning a polyester polymer made of polyethylene terephthalate at a temperature of 150 to 250 ° C. After the first heat treatment with the heating tube (3), the first heat-treated filament between the first gourd roller (4) and the second gourd roller (6) having a low temperature region and a high temperature region secondary heating tube ( 5) A method for producing biaxial blended yarn by high-speed spinning method, which is prepared by stretching and entangled it with heat treatment.

In the present invention, if the intrinsic viscosity is less than 0.63 is severely generated by cutting and moor, it is not possible to manufacture a bi-shrink blend yarn by high-speed spinning, if the intrinsic viscosity exceeds 0.67, the pressure in the pack of the spinneret is too large Poor radioactivity

In addition, in the present invention, the reason for the heat treatment with the primary heating tube having a temperature of 150 to 250 ° C. is to give good stretchability due to the orientation of the molecular chain during stretching between the first roller and the second roller. If the temperature is less than 150 ° C., the heat treatment effect is weak, so that cutting and shaping occur during the stretching, which is not preferable.

In this way, the first heat treated yarn is stretched by heat treatment between the first gourd roller and the second gourd roller by a second heating tube. The second heating tube is divided into two to four parts having different temperatures by a steam spraying device. If there are two parts where the temperature of the secondary heating tank is different (detailed view of part A of FIG. 4), the primary heated filament is divided into A and B groups, and the A group is a high temperature place. B group is low temperature or A group is low temperature, B group is stretched while passing through a high temperature heat treatment.

In addition, if there are four parts with different temperatures in the secondary heating vessel (refer to the detailed view of part A of FIG. Just do it.

If there are six parts with different temperature of heating vessel, it is difficult to use them on equipment.

That is, the present invention is a secondary heating tube device that is heat-treated between the first gourd roller and the second gourd roller, so that when there are a large number of different temperature parts to heat-treat all the thread passing through the first gourd roller and the second gourd roller. This is because the size of the heating vessel must be very large, resulting in a large energy loss.

The reason why stretching is performed while passing through a secondary heating vessel having a different temperature portion is that stretching is a function of raising the degree of crystallization and alignment of molecular chains.

Therefore, the present invention is a method of manufacturing a biaxial horn fiber by using this principle, because the thread passed to the high temperature portion is drawn well, the low shrink portion and the thread passed to the low temperature portion is a high shrink portion.

At this time, the temperature difference between the high temperature part and the low temperature part is preferably 20 to 30 ° C. If the temperature difference is less than 20 ° C., the temperature difference between the high temperature heat treatment part and the low temperature heat treatment part is low, so that a good shrinkage effect can be obtained. If the temperature difference exceeds 30 ° C, good stretchability cannot be obtained.

In other words, if the temperature difference is large, the difference between the stretching force of the low-temperature drawing yarn and the high-temperature drawing yarn becomes very large (in the case of the present invention, since the speed of the drawing rolls of the low-temperature section and the high-temperature section is the same), the low temperature section cuts and mourns occur, and thus the good stretching is achieved. Workability can not be obtained. At this time, the stretching heating temperature is preferably 110 ~ 200 ℃.

If the stretching heating temperature is less than 110 ℃ due to poor drawability and cutting occurs a large amount, and if it exceeds 200 ℃ embrittlement phenomenon of the fiber due to high temperature occurs.

Hereinafter, the present invention will be described in more detail with reference to Examples.

However, the present invention is not limited to the examples.

(Example 1)

A polyethylene terephthalate chip having an intrinsic viscosity of 0.64 was spinned at a spin temperature of 295 ° C. with a diameter of 0.2 mm and a discharge amount of 75 deniers, thereby spinning 36 filament yarns. Thereafter, the cooling wind temperature was 20 ° C., and the wind speed was passed through a first heating vessel having a temperature of 180 ° C. and a 36 filament manufactured by cooling at 0.50 m / sec, followed by a temperature of 90 ° C. and a speed of 5,000 / min. Between the gourd roller and a second gourd roller with a temperature of 130 ° C and a speed of 5,075 m / min, the heat treatment is performed by heat treatment with a second heating tube in which two parts of different temperatures exist, and 18 filaments pass through a part having a temperature of 110 ° C. After heat treatment, the remaining 18 filaments were passed through a portion having a temperature of 130 ° C., stretched while being heat treated, and then spliced together, and then wound up at a winding speed of 5,014 n / min after being impregnated with an entanglement apparatus.

(If there are four parts with different temperatures in the second heating tube, two 36 filament spinnerets can be used to make a large amount of yarn.)

(Examples 2 to 6) (Comparative Examples 1 to 4)

It was prepared in the same manner as in Example 1, but by changing various conditions as shown in Table 1 below.

TABLE 1

Shrinkage rate measurement condition 100 ℃ hot water × 30 minutes

Measuring condition: If the number of cuts is more than one time when winding 9kg: ×

When the number of cuts is more than 0 times when winding 9kg ○

Claims (5)

The intrinsic viscosity is 0.63 to 0.67, and 90 mol% or more of the entire molecular chain is spun at a high speed of 5,000 m / min or higher at a spinning speed of a polyester polymer made of polyethylene terephthalate. After the first heat treatment, the first heat-treated filament is stretched and annealed in a secondary heating tube having a low temperature region and a high temperature region between the first gourd roller and the second gourd roller, characterized in that it is manufactured by Process for producing polyester bispun blended yarn. The method of claim 1, wherein the first heat-treated filament is divided into group A and group B, and group A passes through the secondary heating tube to a region having a low temperature or a region having a high temperature, and the group B passes the group A to a region having a low temperature. On the contrary, when passing through a high temperature region, and when passing the group A through a high temperature region, passing through a secondary heating tube of a low temperature region, the polyester bishrink blended yarn manufacturing method. The method of claim 1, wherein the temperature difference between the low temperature portion and the high temperature portion of the secondary heating vessel is 20 to 30 ° C. The intrinsic viscosity is 0.63 to 0.67, and 90 mol% or more of the entire molecular chain is spun at a high speed of 5,000 m / min or higher at a spinning speed of a polyester polymer made of polyethylene terephthalate. In the apparatus for producing a bi-shrink blend yarn by stretching the first heat-treated filament and heat treatment between the first gourd roller and the second gourd roller by a second heating tube after the second heat treatment, Apparatus for producing a polyester biaxial blended fiber, characterized in that it is divided into four parts. 5. The apparatus as claimed in claim 4, wherein the temperature difference in the secondary heating barrel is caused by a steam spraying device.