JPH0244922B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-headed spinning device suitable for direct spinning.

(Prior art and problems to be solved by the invention) Conventionally, various methods have been used to impart antistatic properties, easy dyeability, anti-pilling properties, flame retardancy, etc. to thermoplastic synthetic polymers such as polyamides and polyesters. A method is proposed. For example, Japanese Patent Publication No. 52-43926 discloses that a modifier is added to a fiber-forming polymer just before it is turned into yarn, and after rapid mixing with a static kneading element for 180 seconds or less, the fiber is immediately spun. .

On the other hand, in order to improve productivity, equipment is becoming larger, more unified, and more continuous.In fact, direct continuous loading and direct spinning are used in the production of polyester staples, but on the other hand, consumer demands are The company aims to diversify and upgrade its products. In order to meet these contradictory demands, the present inventors have completed the present invention as a result of intensive research and development.

An object of the present invention is to provide a spinning device that can cope with the diversification of products through simple operation. especially,
By simply replacing the spinning pack and opening/closing the modifier injection valve, you can transform ordinary fibers into modified fibers mixed with modifiers such as antistatic agents, easy-to-dye agents, and flame retardants (these are referred to as single fibers). The object of the present invention is to provide a spinning device capable of spinning fibers having various properties including composite fibers. Still another object of the present invention is to provide a spinning device that can easily handle the diversification of products in direct spinning.

(Means for Solving the Problems) That is, the spinning apparatus of the present invention is an apparatus for spinning polymer sent from a continuous polymerization process, and includes a polymer inflow path having a branch path, a metering gear pump installed in each branch path, and a metering gear pump installed in each branch path. A modifier injection path is provided in front of the gear pump, the branch paths merging and having an outlet path communicating with the spinning pack and a spinning pack for spinning a single fiber, and having an injection valve in at least one of the branch paths; Further, the present invention is a double-headed spinning device characterized in that a mixer having a static kneading element is disposed before or after the gear pump, or before and after the gear pump.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The double-headed spinning apparatus of the present invention will be explained below with reference to the drawings. 1 is a polymer inflow channel having branch channels 2 and 3. A modifier injection channel 5 with an injection valve 4 is connected to the branch channel 2, followed by a mixer 6 with a stationary kneading element, a metering gear pump 7, a mixer 8 with a stationary kneading element, and each branch channel is combined and isolated. Outflow channel 9 communicating with textile spinning pack 10
are arranged sequentially. Here, the mixers 6 and 8 are disposed before and after the metering gear pump 7, but it suffices to have either the front or the rear mixers. However, in order to improve the effect of kneading the modifier and polymer, it is preferable to arrange the mixer before and after the pump 7. 1st
The figure shows a modifier injection passage 5' having an injection valve 4' in the other branch passage 3 as well as the branch passage 2, a mixer 6',
Although a metering gear pump 7', a mixer 8', and an outlet passage 9' are shown, the modifier injection passage 5' having the injection valve 4, mixer 6', and 8' may be omitted. However, since various modifications of fibers can be made by simply opening and closing the injection valve 4', the range of product diversification will be greatly increased if a device similar to branch path 2 is installed in branch path 3. .

According to the spinning apparatus of the present invention, for example, polyethylene terephthalate sent from the continuous polymerization process to the spinning process enters the spinning apparatus of the present invention through the polymer inflow path 1 and is divided into branch paths 2 and 3. A modifier made of a polyethylene glycol derivative is injected into the streams of branch paths 2 and 3 from modifier injection paths 5 and 5' through injection valves 4 and 4', and mixed with polyethylene terephthalate in mixers 6 and 6'.
After being metered by gear pumps 7 and 7' and further mixed by mixers 8 and 8', they are combined again in outlet channels 9 and 9', and sent to a single fiber spinning pack 10 to spin modified polyethylene terephthalate filaments. The same apparatus is used to spin conventional polyethylene terephthalate filaments when injection valves 4 and 4' are closed and no modifier is injected in FIG. In addition, in FIG. 1, the injection valve 4 is opened, and the injection valve 4' is closed, and the modified polyethylene terephthalate is poured into the spinning pack 10 from the outlet passage 9', and the polyethylene terephthalate containing no modifier is fed from the outlet passage 9'. When the liquid is sent to the filament, a filament is spun out in which a phase of polyethylene terephthalate with a uniform modifier mixed therein and a phase of polyethylene terephthalate with nothing mixed therein are mixed non-uniformly. Also, when the same modifier is injected by opening the injection valves 4 and 4' in FIG. 1, a modified filament can be spun.

The spinning pack 11 for manufacturing composite fibers shown in FIG. 2 is installed in place of the spinning pack 10 for manufacturing individual fibers shown in FIG. A modifier is injected into the polyethylene terephthalate, mixed by mixers 6 and 8, and sent to the spinning pack 11 from the inflow path 9', and the polyethylene terephthalate from the branch path 3 is transferred to the outflow path without injecting the modifier. From 9', the filaments are sent to the spinning pack 11, where they are joined in a parallel type or core-sheath type, and a composite filament is spun.

In this manner, by using the apparatus of the present invention, not only ordinary fibers but also modified fibers and composite fibers can be spun very easily by simply replacing the spinning pack and opening and closing the injection valves 4 and 4'. be able to.

The spinning device of the present invention uses nylon 6, nylon 6,
6. Nylon 610, Nylon 11, Nylon 1
It can be applied to the spinning of polyamides such as 2 or copolymers thereof, polyesters of polyethylene terephthalate or copolymers thereof, polyolefins such as polyethylene and polypropylene, polyurethane, polystyrene, polyurea, polyacrylonitrile, etc.

Examples of mixers having kneading elements that can be applied to the present invention include the "Static Mixer" manufactured by Kenix Co., Ltd. and the "Ross-LSG" manufactured by Tokushu Kikako Co., Ltd.
-Mixer”, Sulzer’s “SM-Mixer”
etc., but other known mixers can of course also be used. The number of kneading elements varies depending on the type of polymer to be applied, the amount and type of modifier to be injected, or the degree of kneading. Too few kneading elements will result in insufficient kneading, while too many will cause pressure loss. However, typically at least six, and usually as many as 20 to 40, are used for each branch.

As the metering gear pump applied to the present invention, a double gear pump or a commonly used one can be used as is, but the kneading effect can be further improved by using a gear pump incorporating a kneading device.

In the spinning apparatus of the present invention, the meeting part of the polymer branch path and the modifier injection path and the mixer 6 are arranged in the flow path up to the inlet of the metering gear pump, and in particular, the connection part of the polymer branch path and the modifier injection path is arranged in the flow path up to the inlet of the metering gear pump. It is preferable to incorporate it into the wear plate of. By doing so, the pressure on the injection side of the modifier is not only kept constant over time and the metering accuracy of the modifier is stabilized, but also the mixer can be easily and compactly installed. In particular, when mixers are placed before and after the metering pump, not only is the kneading effect improved, but the pressure loss of the mixer 6 is borne by the previous pump, and the pressure loss of the mixer 8 is borne by the metering gear pump. , it is possible to increase the overall allowable pressure loss, and stable spinning can be achieved.

(Effects of the Invention) Although the spinning device of the present invention is an extremely simple device, it is possible to improve the properties of easy dyeing, antistatic, flame retardant, and hygroscopic properties from ordinary fibers that do not contain any modifiers. Opening and closing the modifier injection valve, replacing ordinary spinning packs and spinning packs for composite fibers, etc. It is possible to manufacture it extremely easily, and since the spinning pack can be replaced easily and in a short time, the time required for changeover can be shortened, and therefore there is little loss, and productivity and operability are extremely high.

[Brief explanation of drawings]

FIG. 1 is a schematic illustration of the present invention, and FIG. 2 shows a spinning pack 11 for composite fibers which can be delivered in place of the usual spinning pack 10 for fibers shown in FIG.

Claims (1)

[Scope of Claims] 1. In an apparatus for spinning polymer sent from a continuous polymerization process, a polymer inflow channel having branch channels, a metering gear pump installed in each branch channel, and each branch channel are combined and connected to a spinning pack. comprising an outflow path and a spinning pack for spinning single fibers,
In addition, at least one branch path is provided with a modifier injection path having an injection valve in front of the gear pump, and a mixer having a stationary kneading element in front of or after the gear pump, or before and after the gear pump. A double-headed spinning device. 2. The apparatus according to claim 1, wherein a mixer having static kneading elements is disposed before and after the gear pump. 3. The apparatus according to claim 1 or 2, wherein the mixer in one branch path has at least six static kneading elements.