JPS6260494B2 - - 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 present invention aims to provide a method for producing a three-dimensional network aggregate that can add other desired properties in addition to the above-mentioned properties based on the network structure, thereby synergistically increasing the properties and greatly expanding the range of applications. shall be.

(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 the filaments 1. Similarly, a substance 3 having other required properties is lowered through the gap, and while the filament 1 is still in a molten state, the molten filament 1 is passed through the turbulent air flow and folded, and at the same time By mixing or intertwining the substance 3 with other required properties into the filament 1 and taking it off at a slower rate than the above-mentioned descending speed, the substance 3 is brought together in a three-dimensional net shape. The present invention provides a method for manufacturing a three-dimensional network aggregate 4 made of a composite material, which is characterized by being solidified by cooling.

(Function) In the present invention, when the molten synthetic resin filament 1 passes through a turbulent airflow and folds, at the same time, the substance 3 having other required properties evenly mixes or intertwines with the filament 1 to form a network. , the properties of other substances are added to the properties based on the network structure.

(Example) To explain the illustrated embodiment of the present invention, a large number of thermoplastic synthetic resin fiber filaments 1 are extruded from a nozzle 2 of an extruder die and allowed to naturally descend, and each filament 1 at a position below the nozzle 2 is extruded. From the supply pipe 5 introduced into the gap from the outside, powder, liquid,
A substance 3 having various forms such as fibers and having other required properties different from the material of the filament 1 is similarly lowered, and while the filament 1 is still in a molten state, it is directed downward. Alternatively, the filament 1 is caused to pass through a hot air column 6 that alternately flows turbulently in an upward direction to cause the filament 1 to undergo primary folding, and at the same time, the substance 3 having the above-mentioned other required properties is mixed or entangled with the filament 1, and then the substance 3 is caused to fall at the above-mentioned descending speed. By taking it up by take-up rolls 7, 7' more slowly, it is folded secondarily and is assembled into a three-dimensional net shape with point adhesion, and then immediately immersed in cooling water 8 to rapidly cool and solidify. A three-dimensional net-like aggregate 4 made of a composite material is obtained.

In the figure, 9 is a hot air path forming wall, 10 is a projection for generating turbulent flow, and 11 is an injection pipe that jets jet air into the hot air field to make the turbulent flow more complicated.

Specific examples of the substance 3 having the above-mentioned other required properties include granular activated carbon, natural fibers such as cotton or linen, or pieces of aluminum foil. When natural fibers such as hemp are intertwined, a sweat-absorbing bed mat is created, and when pieces of aluminum foil are mixed in, a decorative material is created.

(Effects of the Invention) As described above, the present invention provides a three-dimensional network aggregate that can have a variety of new functions by synergizing the properties of the substances mixed or entangled with the properties based on the network structure, and has an extremely expanded range of uses. This makes it easy to provide the following information. In particular, according to the present invention, other substances only need to be dropped, and when the synthetic resin filaments are folded by turbulence, they are evenly mixed or entangled, so it is only necessary to add an extremely simple device, which increases costs. Not at all. In addition, the substances to be mixed or entangled can be in various forms such as powder, liquid, and fiber, so there is a possibility that a wide variety of products exist and a wide variety of products can be produced.

[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. DESCRIPTION OF SYMBOLS 1... String, 2... Nozzle, 3... Substance having other required characteristics, 4... Three-dimensional network aggregate, 5... Supply pipe,
6...Hot air path, 7,7'...Take-up roll, 8...Cooling water, 9...Hot air path forming wall, 10...Protrusion for generating turbulent flow,
11... Injection pipe.

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 at the same time, other substances having the desired properties are similarly descended through the gaps between the filaments, while the filaments are still in a molten state. While being held, the molten filament is passed through a turbulent air flow to cause it to fold, and at the same time, the other substances mentioned above are mixed or entangled with the filament, and these are drawn off at a slower rate than the above-mentioned descending speed, thereby causing them to interact with each other. 1. A method for producing a three-dimensional net-like aggregate of a composite material, which comprises assembling dots into a three-dimensional net-like structure, and then rapidly cooling and solidifying the same.