KR20010068970A - The method for manufacturing the material absorbing noises by using PET - Google Patents

Abstract

PURPOSE: A manufacturing method of sound-absorbing material containing polyester is provided to enhance a sound-absorbing performance with a low cost as well as enhance the recycling efficiency by recycling waste absorbing material. CONSTITUTION: First, low melting fiber is mixed to polyester fiber with a ratio of 7:3. Then, the mixture is formed into absorbing material(1) of sheet shape under constant temperature. Next, the absorbing material(1) is seated on a wirenet conveyer horizontally mounted within an oven(10) to be preheated under constant temperature. Then, the heated absorbing material(1) is inserted between a female mold(21) and a male mold(22) to be pressed with constant pressure for predetermined time for forming products of desired shape. Finally, a liquid surface treatment agent(2) is coated on a surface of the absorbing material(1).

Description

The method for manufacturing the material absorbing noises by using PET}

The present invention relates to a technical field for manufacturing sound insulation or sound absorbing material by hot or cold forming a polyester (PET) as a main material, for the soundproofing or sound absorption of conventional buildings or tunnels of highways or subways or railways where car driving noise is severe. In order to absorb noises in the interior, glass fiber, gypsum board, felt, polyurethane foam or styropol, asbestos, etc., are used for the noise level of the construction site, the importance of sound absorption and soundproofing, and the construction of the client. It has been selectively adopted and constructed according to the specification.

Currently, the various materials used for sound absorption or sound insulation are harmful to the human body, which is almost impossible to reuse and recycle when dismantled, resulting in incineration of toxic gases caused by incineration, leading to air pollution that adversely affects the human body and the natural ecosystem. Not only the social and environmental problems have reached a serious stage, but also the price is expensive, the construction is poor, and the overall construction period is long.

1 is a process chart of the sound absorbing material manufacturing method carried out in accordance with the present invention

2 is an oven structure schematic view

3 is a process chart of manufacturing a sound absorbing material as the sound absorbing material treated in FIGS. 1 and 2;

(Code description of main parts of drawing)

P. Sound absorption material 1. Sound absorption material 2. Surface treatment agent

3.Polyester Yarn 4.Low Melting Fiber 5.Other Surface

10.Oven 11. Passage 12. Electric pipe heater

13.Wire net conveyor 14.Air blower

20. Hydraulic press 21. Female mold 22. Male mold

23. Chiller 24. Absorption trimming and hole piercing 25. Drying process

The present invention devised to use the polyester (PET) as a sound absorbing material in order to solve the above problems as described above based on the accompanying drawings, the polyester (PET) as a beverage container classified as household waste Cushions such as waste PET bottles used, waste cloths made of polyester, waste beddings, etc., and cushioning materials or polyester raw materials can be used.

First, when spinning a polyester yarn with a thickness of 10 denier from a known spinning machine nozzle, the cross section of the nozzle is formed into an ellipse so that the surface area is larger than the garden, and the polyester yarn (3) By spinning), low-melting fiber (4) (melting point 150 ~ 200 ℃) is blended with this polyester yarn, and then extruded into a plate with a certain thickness at a constant atmosphere temperature of 250 ℃ ~ 300 ℃, and molded into a predetermined shape. When the sound absorbing material (1) is made of polyester material, which is given a property to be maintained in shape when it is formed and has a certain size to become a material to be hot or cold formed by burning the yarn, the shape retention and water repellency of the material The surface treatment material is applied to the surface of the product with a liquid surface treatment agent (2) to have water and flame retardant functions. For example, the mixing ratio of FR # CT series, which is a phosphorus-based material (3), and FC # 900 series material, which is a fluorine-based material (4), is mixed at a ratio of 7: 3. 5) A sound absorbing material having a sound absorbing material (1) treated by applying a mixed liquid surface treatment material (2) adjusted to 5: 5 to prevent water repellent, flame retardant, and peeling damage from corners, and the like. In order to mold the sound absorbing material 1 into the oven 10, the oven 10 is preheated (preheated) for about 30 to 50 seconds at an ambient temperature of 250 ° C. to 300 ° C. in the oven 10. The outer wall surface other than the small passage 11 through which the sound absorbing material 1 enters and exits at a constant horizontal and vertical height is sealed and a predetermined number of electric pipe heaters 12 are installed on the upper and lower surfaces of the oven 10. And the sound absorbing material 1 is placed or the sound absorbing material 1 is moved into and out of the oven 10. Wire net conveyor 13 with good ventilation is installed horizontally so that high heat in the oven penetrates into the sound-absorbing material 1 having a constant thickness and hot air is more circulated in one side of the oven 10. After preheating in the oven 10 to which the air blower 14 is mounted, the sound absorbing material 1 is hydraulically equipped with a female mold 21 and a male mold 22 made of hard aluminum, which is a material having high thermal conductivity. Interposed between the female and male molds 21 and 22 of the press 20 and at a speed of 150 to 200 mm / sec in the high speed section, and a speed of 7 to 10 mm / sec in the low speed section and 3 to 10 kg / cm ² (depending on the density). Molding for 30 to 50 sec time, and then the sound absorbing material 9, which is a molded product, is completed via a known cooler 23.

By the way, since the process of trimming, hole piercing 24, etc. of the sound absorption material P which is shaping | molding material is a well-known process, description is abbreviate | omitted.

The sound absorbing material P completed as described above is sprayed with the above-mentioned liquid surface treatment material 2 so that water repellency, flame retardancy, strength and shape can be maintained, and then the surface treatment material 2 is completely subjected to a drying process 25. After it is dried, it is shipped to the factory after undergoing a water repellent test.

As the main material is polyester material, which is relatively inexpensive as mentioned above, it is not only used existing waste material polyester but also manufactured and used as sound absorbing and soundproofing material. There are many effects, such as being used as a cushioning material that can dampen the vibration of trains when intervening in subway trains by adjusting the density without causing any risks.In particular, about 10 denier that make up sound absorbing material (P) Since the sound absorbing material is formed by the thin yarns in the elliptic cross section with the thickness of, it is possible to provide a sound absorbing material having good sound absorption and soundproofing due to its low density due to the Helmholtz resonance theory in acoustic engineering.

Claims (1)

In producing the sound-absorbing material (1), which becomes the sound-absorbing material (P) main material with a constant thickness and width, by spinning and opening a fine yarn having an elliptical cross section with waste polyester (PET) as a main material from the radiator nozzle. A low melting fiber is mixed with the yarn at a ratio of about 7: 3 to form a plate at a constant ambient temperature so that the plate and shape can be maintained and the sound absorbing material 1 is transferred to an electric pipe heater 12 ) Is placed on the wire net conveyor 13 in the oven 10 in which the wire net conveyor 13 of the predetermined length is installed horizontally and preheats the sound absorbing material 1 to a temperature at which a constant atmosphere temperature is maintained. The sound absorbing material 1 having the latent heat is interposed between the female mold 21 and the male mold 22 and pressed for a predetermined pressure and time to produce a sound absorbing material P having a required shape. A method for producing a sound absorbing material using a polyester (PET) material, which is obtained by coating and drying corners and edges with a liquid surface treatment material (2), which is a phosphorous material and a fluorine material.