JPS5817290B2 - Kosokuboushimaki Torihouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method of melt-spinning a fiber-forming synthetic polymer, solidifying it by cooling, and then winding it directly with a wine gourd at a speed of 2500771.7 minutes without passing through a godet roller. It is.

Recently, highly oriented undrawn yarns have been produced by melt-spinning fiber-forming synthetic polymers such as polyamides and polyesters, cooling and solidifying them, and then winding them at high speeds of 2,500 m or more for 7 minutes. .

Even in such high-speed spinning and winding, the spun yarn that has been cooled and solidified is usually taken up by a pair of godet rollers and then wound up with a wine goose; however, in high-speed spinning and winding, the degree of orientation of the spun yarn is It is said that it is possible to use the ``Godetless method'' in which the Godet roller is omitted and the spun yarn is directly taken up by a wine gourd and wound.

This method has the advantage of rationalizing equipment costs and space because it does not use a godet roller.
Because the spun yarn is directly picked up by the wine goo and wound up as a package, partial yarn breakage (
Even if a single yarn breakage (hereinafter referred to as "single yarn breakage") occurs, there is a problem in that the yarn is simply wound into a package.

Furthermore, such single yarn breakage cannot be detected by a yarn breakage detection device, and a package wound with a spun yarn in which a single yarn breakage has occurred is no different in appearance from a package of normal yarn. Therefore, even if package inspection is strengthened, it is impossible to detect defective packages containing single thread breaks.

For this reason, it is said that the "Godetless method" is difficult to guarantee the quality of product packaging2 (and that there are problems with its industrial use.

As a result of research to solve the above-mentioned problems in the godetless method, the present inventors found that the spinning winding speed was 2500 m/
In the case of high-speed spinning of more than 1 minute, the yarn discharged from the spinneret, cooled and solidified, is allowed to run in contact with freely rotating rollers of a specific size and surface condition, and then guided to a wine goo for winding. They have discovered that when a single yarn breakage occurs, the cut single yarn or the entire yarn wraps around the rotating roller, which makes it easy to detect single yarn breakage, and has arrived at the present invention. be.

That is, in the present invention, when a fiber-forming synthetic polymer is melt-spun, cooled and solidified, and then wound directly by a wine goose at a speed of 2,500 m/min or more without passing through a godet roller, the cooled and solidified yarn is formed into a filament with a diameter of 10 to 100 m/min. After running in contact with a freely rotating roller with a diameter of 60 mm and a surface roughness of 5S or less, the yarn is guided to a wine gourd and wound up, so that if a single yarn breaks, the freely rotating roller is caused to wind the single yarn. This makes it easy to detect breaks.

In the present invention, the term "fiber-forming synthetic polymer" refers generally to thermoplastic synthetic polymers that can be melt-spun, but particularly aliphatic polyamides such as nylon 6 and nylon 66, or aromatic polyamides such as polyethylene terephthalate and polytetramethylene terephthalate. Group polyesters are preferred.

These polymers may contain additives such as matting agents, pigments, dyes, stabilizers, moisture absorbers, and flame retardants.

The spinneret used for melt spinning in the present invention includes:
The spinneret may have a normal circular spinning hole, but it may also have a non-circular spinneret such as a Y-shape, cross-shape, mallotiropal-shape, etc. (Also, a special spinneret that can form hollow fibers or composite fibers may also be used. .

In high-speed spinning and winding using the godetless method, generally the above-mentioned polymer is melted and discharged from a spinneret,
After cooling and solidifying the spun yarn by blowing cooling air on it, the spun yarn is treated with an oil agent, then guided to a traverse fulcrum guide provided upstream of the wine goo, and further passed through the traverse guide and wound by the wine goo. However, in the present invention, while the cooled and solidified spun yarn reaches the wine goo, preferably between the oil treatment device and the traverse fulcrum guide, a diameter of 10 to 60 mm and a surface roughness of 58 mm are provided.
The following freely rotating rollers are provided, and the spun yarn is made to run in contact with the rollers.

The free rotating roller in the present invention does not apply extra tension to the yarn or damage the yarn during normal spinning, and when a single yarn breakage occurs, the freely rotating roller can be reliably and quickly moved to the roller. Therefore, it is extremely important that the size and surface roughness of the roller be within the above range.

In particular, the size of the roller is 15 to 30 mm in diameter and 10 to 2 mm in length.
0cIrL is preferable, and the surface roughness is preferably 1 to 5S.

The roller should preferably be as light as possible and easy to rotate at high speed; for example, an air bearing roller or the like is effectively used.

The contact angle between the roller and the yarn should be appropriately selected depending on conditions such as the size of the roller, the denier of the yarn, and the tension.
% or more.

On the other hand, if the contact angle is too large (if the contact angle is too large, the load on the bearing portion of the roller will be too large and the life of the roller system will be shortened).

For this reason, it is preferable that the contact angle between the roller and the yarn is in the range of 3 to 30°C.

The winding speed of the wine goo is 2,500 m/min or more, but from the viewpoint of the quality of the product yarn, the winding speed is 3,000 to 450 m/min.
A speed of 0 m7 min is preferred.

Particularly in the case of nylon 6, the package wound at this speed has the advantage that it has a good appearance and does not collapse over time.

In the present invention, by causing the spun yarn to run in contact with the freely rotating roller, if a single yarn breaks during spinning, the single yarn or the entire filament immediately winds around the roller.
Detection of single yarn breakage is extremely easy, but in the case of industrial implementation, a yarn winding detection device may be provided on the free rotating roller to issue an alarm at the same time as winding occurs. Further, the detection device may be interlocked with the yarn cutting device and the aspirator to interrupt winding of the spinning spindle where the winding has occurred.

On the other hand, if a large amount of winding occurs on the free-rotating roller, the yarn will break and the rotation of the roller will stop. Therefore, a rotational speed spinning device for the roller is provided, and this is linked with an aspirator to wind the yarn. The spun yarn may be suctioned by an aspirator at the same time as yarn breakage occurs due to attachment.

Further, in the present invention, in order to impart cohesiveness to the yarn to be wound, an interlace nozzle is provided between the freely rotating roller and the upstream oil applying device or between the roller and the downstream traverse fulcrum guide by using an air turbulent flow. may be provided to intertwine the single yarns constituting the yarn before winding.

Next, the present invention will be explained with reference to the drawings.

The figure is a schematic diagram showing one embodiment of the present invention, in which 1 is a spinneret, 2 is a cooling air outlet, 3 is a spinning duct, 4 is an oiling roller, 5a and 5b are yarn guide regulation guides, and 6 is a free Rotating roller, 7 is a traverse fulcrum guide, 8 is a traverse guide, 9 is a wine goo 7 traction roller, 10
11 is a package, 11 is a yarn cutting device, 12 is an aspirator, and 1Y is a spun yarn.

According to the present invention, after the fiber-forming polymer is melted, it is cooled and solidified by the cooling air discharged through the spinneret 1 and blown in the direction of the arrow from the cooling air blowing part 2, and the spun yarn Y
After traveling in the spinning duct 3, it is treated with an oil agent by an oiling roller 4 provided downstream, and then comes into contact with a freely rotating roller 6 with a diameter of 10 to 60 mm and a surface roughness of 58 or less, and is then traversed. It passes through a fulcrum guide 7 and a traverse guide 8, and is wound up into a package 10 that is driven in contact with a friction roller 9.

In the illustrated embodiment, the free-rotating roller 5 is provided with a rotational speed detection device (not shown) for the roller, which is linked with the yarn cutting device 11 and the aspirator 12.

Therefore, if a single yarn breakage occurs during spinning and a large amount of yarn winds around the freely rotating roller 6, leading to yarn breakage, the yarn is automatically cut upstream of the roller and the yarn is spun. The threads continuously falling from the duct are removed by suction by an aspirator.

According to the present invention as described above, in high-speed spinning using the godetless method, single yarn breakage can be detected simply by providing a specific free-rotating roller and letting the spun yarn run in contact with it. quality assurance becomes possible.

Example 1 Using the apparatus shown in the figure, nylon 6 was discharged from a spinneret with 24 holes, cooled with cooling air at 25°C, treated with oil, and passed through a wine goo without passing through a godet roller.
The yarn was wound at a speed of 0 m/min to produce a yarn of 85 denier/24 filaments.

In this case, a freely rotating roller (air bearing) with a diameter of 20 mm, a length of 100 rnrIL, and a surface roughness of 2S is provided;
Spinning and winding was performed with and without the provision.

In the former case, some of the spindles were found to be wrapped around the freely rotating roller, so packages for such spindles were classified as defective products.

Next, when only the non-defective packages in the former case were subjected to a warper test, the yarn breakage rate was O times/100 kg.

On the other hand, in the latter case, since no defective packages could be detected, all packages were subjected to a warper test, and the yarn breakage rate was 2 times/100 kg.

[Brief explanation of the drawing]

The accompanying drawings are schematic diagrams illustrating one embodiment of the present invention, and 1
is a spinneret, 2 is a cooling air suction unit, 3 is a spinning duct, 4 is an oiling roller, 6 is a free rotation roller, 7 is a traverse fulcrum guide, 8 is a traverse guide, 9 is a wine goo friction roller, 10 is a winding pan cage It is.

Claims (1)

[Claims] 1. When a fiber-forming synthetic polymer is melt-spun, cooled and solidified, and then wound directly by a winding machine at a speed of 2500 m7 or more without going through a godet roller, the cooled and solidified yarn is 10 to 60 mm in diameter and has a surface roughness. Saga 5
A high-speed spinning and winding method characterized in that the yarn is made to run in contact with a freely rotating roller of S or less, and then guided to a wine goose and wound.