JPS6260495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a three-dimensional network aggregate having required properties using a composite material.

(Prior art) Conventionally, three-dimensional net-like aggregates made of synthetic resin with complex and irregular voids have been used for scrubbers, cushion members, water discharge members in underdrain equipment, fillers for pollution treatment tanks, etc. As a manufacturing method, a large number of thermoplastic synthetic resin filaments are spun from a downward nozzle and allowed to fall naturally, and while these filaments are in a molten state, these filaments are passed through a turbulent air flow, and the molten filaments are The production method is characterized in that the molten filaments are taken up at a slower rate than the above-mentioned descending speed, thereby causing the molten filaments to fold and aggregate into a three-dimensional network of dots, which are then rapidly cooled and solidified. It has already been proposed by the inventor (Special Publication No. 1983-
3941, Special Publication No. 56-3942).

(Problems to be Solved by the Invention) By the way, the three-dimensional network aggregate manufactured by the above-mentioned conventional example can be used as a cushion material, etc., by utilizing the properties based on the network structure, such as elasticity and water permeability. Although it is widely used, its application is not necessarily widespread.

The first object of the present invention is to provide a method for manufacturing a three-dimensional network aggregate that has properties based on the network structure as well as other necessary properties and can further expand the range of applications. A second purpose is to make the above-mentioned turbulent airflow more turbulent and to create more complicated folds of the filaments while adding the characteristics.

(Means for Solving the Problems) In order to achieve the above object, the present invention spins out a large number of thermoplastic synthetic resin filaments 1 from a downward nozzle 2 and naturally descends. While still in a molten state, the jet air 5 is passed through the turbulent air flow, and from the injection pipes 4 installed in large numbers on the inner wall of the turbulence passage 3, the jet air 5 contains a substance in the form of powder or liquid having the desired properties. is injected onto the filaments 1 at a required intensity and intermittently or continuously as necessary, and by taking these filaments 1 at a lower speed than the above-mentioned descending speed, each molten filament 1 is
The present invention provides a method for manufacturing a three-dimensional net-like aggregate of a composite material, which is characterized by folding and assembling point-adhesive materials into a three-dimensional net, and then rapidly cooling and solidifying the same.

(Function) In the present invention, when the molten filament 1... passes through the turbulent airflow, it is folded to a primary degree. Jet air 5 containing particles or liquid substances having the required properties is injected onto the filament 1 intermittently or continuously according to the required intensity and as needed. Other substances are evenly mixed and added to the strips 1, so that it becomes possible to form a three-dimensional network aggregate 8 of the composite material. At the same time, the turbulent airflow is further disturbed by the injection of a large number of jet airs 5, and the primary folds of the filaments 1 are made more complicated.

(Example) To explain the illustrated example of the present invention,
A large number of thermoplastic synthetic resin fiber filaments 1 are extruded from the nozzle 2 of the die of the extruder and allowed to fall naturally, and while these filaments 1 are still in a molten state, they are pushed downward or upward. The hot air is passed through a turbulent airflow that alternately flows in turbulence, and a powdery or liquid substance (for example, molten wax or chemical solution) having desired characteristics is injected from injection pipes 4 installed in large numbers on the inner wall of the turbulent air passage 3. The jet air 5... containing the filament 1 is injected with the required strength and intermittently or continuously as necessary to the filament 1 to be mixed and added at the same time as the primary folding, and then the jet air 5 is injected at a lower speed than the above-mentioned descending speed. By taking it up with take-up rolls 6, 6', it is made to fold secondarily and aggregated into a three-dimensional net shape, and then immediately immersed in cooling water 7 to rapidly cool and solidify the composite material. A three-dimensional network aggregate 8 is obtained.

In the figure, reference numeral 9 indicates a wall for forming a turbulence passage, and reference numeral 10 indicates a protrusion for generating turbulence.

(Effects of the Invention) With the above-described structure, the present invention has not only the characteristics based on the network structure but also the necessary characteristics of other substances mixed and added thereto, and the functions are synergistically increased. It is possible to easily produce a three-dimensional network aggregate made of composite materials that has a wide range of applications. Furthermore, when the other substances mentioned above are mixed and added, they are included in the jet air and injected into the turbulent airflow, which has the effect of further turbulence and making the folds of the filaments more complicated.

[Brief explanation of the drawing]

The figure is a schematic side view showing an embodiment of a method for continuously manufacturing a three-dimensional network aggregate using the composite material of the present invention. 1... String, 2... Nozzle, 3... Turbulence passage, 4
... Injection pipe, 5... Jet air, 6, 6'... Take-up roll, 7... Cooling water, 8... Three-dimensional network aggregate.

Claims (1)

[Claims] 1. A large number of thermoplastic synthetic resin filaments are spun out from a downward nozzle and allowed to fall naturally, and while these filaments are still in a molten state, they are passed through a turbulent air flow, and a large number of jets are installed on the inner wall of the turbulence passage. Jet air containing powder or liquid material having the required characteristics is injected from the pipe onto the filaments at the required strength and intermittently or continuously as necessary to lower these filaments at the above-mentioned descending speed. A method for producing a three-dimensional net-like aggregate of a composite material, characterized in that each molten filament is folded by slow withdrawal to form point-adhesive aggregation mutually in a three-dimensional network, and then immediately cooled and solidified rapidly. .