JPS5829725B2 - Polymer no. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for complex mixing of polymers.

In order to improve synthetic fibers, it is generally done to mix several tens of percent of different polymers, but conventional non-static (dynamic) mixing methods include chip blending, mixing with different polymer liquids using screws, etc. is being carried out.

However, when using such conventional equipment and methods, polymers are mixed by rotating shear using a screw or stirring blade, so the mixing state is incomplete and non-uniform, and each component phase is different from a uniform mixed phase. becomes too fine,
It has been very difficult to obtain coarse and homogenized mixed phase polymers.

The present invention has been made to eliminate such conventional drawbacks, and includes a rotating body having a large number of small holes in a cylindrical mixing tank, and polymer A is extracted from the small holes inside the rotating body. This is characterized by radially injecting the polymer B into the polymer B supplied to the outside of the rotating body, forming a composite phase at the combined part of the polymers A and B, and mixing the composite appropriately by rotation.

Embodiments of the present invention will be described below with reference to the drawings.

A is a polymer A consisting of at least one polymer component
, B indicates a polymer B that is different from the A polymer and is composed of at least one polymer component.

1 is a mixing cylinder (mixing tank), which has supply ports 2A and 2B for polymers A and B on one end, and a cap device 1 on the other end.
1 is a cylindrical body having an outlet passageway 10 of the composite mixed polymer leading to the cylindrical body 1 .

Reference numeral 3 denotes a rotating shaft having a hollow structure and having a polymer groove 4A and a polymer slit 5A for introducing polymer A into the hollow portion at a position corresponding to the supply port 2A of the cylinder 1, and a shaft 3 corresponding to the supply port 2B of the cylinder 1. Polymer B between
grooves 4B and polymer slits 5B.

Further, it has a large number of small holes 7 radially extending from the hollow part 6 of the rotating shaft 3 toward the composite mixing space 9 with the cylinder 1 in the injection direction.

Note that the two supply ports for Polymer A are not necessarily connected to Cylinder I.
It is not necessary to provide a VC, and the inflow path 2A' provided on the rotating shaft 3 may be used.

8 is a polymer groove 4A for preventing polymers A and B from mixing.
, 4B is the shaft seal.

12 is a shaft seal between the cylinder 1 and the rotating shaft 3.

In the device of the present invention, polymer A is also supplied from the supply port 2A, passes through the groove 4A through the sulin 5A, and reaches the hollow part 6.
The polymer B is injected from the lJ size group 7 and mixed with the polymer B present in the space 9.

Further, the polymer B flows into the supply groove 4B from the supply port 2B, and is uniformly sent out from the outer circumference of the cylinder to the space 9 through the slit 5B.

In this composite mixing space 9, mixing and composite, which is a feature of the present invention, is performed.

That is, with respect to the polymer B flowing into the space 9, the polymer A is injected from the small pores so as to form a composite island.

It is schematically shown as an explanatory diagram in FIG.

Figure 2-1 shows a linear representation of the composite state, and as shown in Figure 2-2, a helical stretching action due to the rotation of the shaft is optionally added to this by the rotation action, and polymer A
In the mixing of B, complex mixing progresses continuously and uniformly.

Such mixed polymers have a moderately uniform mixed phase and enable the production of improved fibers and the like.

In addition, in this apparatus method, the polymer A inlet 2A does not necessarily need to be provided in the cylinder 1 as shown in the example diagram, and the same effect can be obtained by using the inlet channel 2N shown by the broken line on the rotating shaft 3. reactor.

The space shape of the cylinder 1 is normally a straight cylinder, but in order to obtain the desired composite mixing form, the space shape is changed to 3-1 in Figure 3.
It may have a shape as shown in the figure, or it may have a tapered shape as shown in Figure 3-2.

Further, as for the shape of the rotating shaft, any shape can be selected as illustrated in FIG. 4.

Furthermore, the diameter, number and arrangement of holes provided on the rotating shaft are as follows:
It can also be changed as appropriate depending on the viscosity of the polymer, the rotation speed, and the positional relationship with the cylinder.

When the composite mixed fiber is spun using the apparatus of the present invention as described above, an excellent fiber having a suitably coarse and uniform mixed phase in the fiber troughs can be obtained with good spinning conditions.

As the polymers A and B used in the present invention, known synthetic polymer materials such as nylon, polyethylene, and polyvinyl chloride may be used.

Further, although polymer A and polymer B are usually different substances, they do not necessarily need to be different substances, and may be a mixture of similar polymer substances.

[Brief explanation of the drawing]

FIG. 1 shows a typical example of the device of the present invention. FIG. 2 is an explanatory diagram of complex mixing according to the method of the present invention, and FIGS. 3 and 4 are examples of a cylinder and a rotating shaft.

Claims (1)

[Claims] In dynamic composite mixing of 12 or more polymers, polymer B is supplied circumferentially from the outside of the rotating shaft of a rotary mixing device, and polymer A is supplied from the polymer flow path inside the rotating shaft to the outside. 1. A method for dynamic composite mixing of polymers, characterized in that the polymer is injected to the outside of the shaft from a group of small holes provided radially toward the shaft and mixed with the polymer A. 2 In a rotary mixing device, the rotating shaft is a cylindrical body having at least one inlet and a large number of injection holes at the other end, and the outer surface of the cylindrical body has an arbitrary space for mixing. A dynamic composite mixing device for polymers, characterized in that it is surrounded by a cylinder (mixing tank).