KR20020019812A - manufacturing method of percussion intercept plate - Google Patents

Abstract

PURPOSE: Provided is a process for producing floor impact sound-proof material in order to accomplish improvement of sound-resistance and heat-insulation effect to enhance workability of structures in constructional application. CONSTITUTION: The process comprises forming a homogeneous admixture of 90-95wt.% of waste rubber material such as a waste tire with no vulcanization treatment, 5-9wt.% of binder and 0.1-0.7wt.% of foaming agent; charging the admixture into a metal mold having a desired design in an amount equal to 40-60vol.% of internal volume of the mold; heating the admixture in a sealed condition of the mold at 130-200deg.C for 7-20minutes to form a foamed product along with internal shape of the mold; and releasing the prepared product from the mold. The waste rubber material is a major material of the product and preferably crushed into 0.4-6mm diameter and 2-10mm length of fragments.

Description

Manufacturing method of floor impact noise prevention material and its product {manufacturing method of percussion intercept plate}

The present invention relates to a method of manufacturing a floor impact noise prevention material, and more particularly, the floor impact noise prevention material installed on the floor slab in order to more effectively block the impact noise transmitted from the upper floor to the lower floor in an apartment house such as an apartment. , Filling the rubber particles with binder and foaming agent together with only a certain part of the mold volume ratio of a certain type, and heating the mold in a sealed state, so that only a part of the mold volume ratio is filled in the entire mold. It is manufactured by foam molding in the form so that the rubber particles of the raw material constituting the prevention material are molded as a prevention material with uniform density, so that it is not only excellent in blocking effect on the floor impact noise, but also consumes the raw materials that make up the prevention material. It greatly reduced production costs.

In general, various types of floor impact noise prevention materials are installed and installed on the floor slab in order to block floor impact noise transmitted from the upper floor to the lower floor in apartment houses such as apartments.

The floor impact noise is a sound generated when the slab vibrates due to an object falling, moving, or walking. The sound generated at this time, that is, solid sound is transmitted through various paths with extremely low attenuation to vibrate the surface of the structure to be directly reflected. As noise is recognized as one of the important factors influencing the quality of the residential environment, the resolution of dissatisfaction factors for the internal noise sources has emerged as a serious problem. While the desire is increasing, as the materials used for the floor structure of MDUs are getting thinner and lighter, the internal noise sources are increasing.

As such, the conventional floor impact noise shielding material, which is installed on the floor slab to block the impact noise generated between the upper and lower floors of a multi-family house, is a raw material in a mold of a specific type, and the raw rubber or synthetic rubber is a chemical suitable for each use. After mixing with a certain amount of foaming agent and filling it into a mold and foaming it by applying heat, it does not have to go through a separate aging process, which causes a phenomenon of shrinkage, which consumes a considerable amount of money to produce a product suitable for the purpose and uses only new raw materials as raw materials. The waste of resources is caused, and when using waste tires or waste rubber materials, there is a disadvantage that a desulfurization process is essential.

In addition, the conventional floor impact noise prevention material made of waste tires or waste rubber is filled with rubber particles evenly spread in the mold because the rubber particles, which are raw materials, do not have the flowability, which is the main characteristic of rubber, in the formation process. It is manufactured by pressing as it is in the state of being filled in the mold in the state where it is not agglomerated locally, and the impact noise preventing material as a manufactured product is manufactured in a state where the particles are partially agglomerated without having a uniform density, Due to the excessive input amount, there are many problems to effectively block the target floor impact noise, as well as the cost increase factor.

Therefore, the object of the present invention is to produce a product that is not suitable for the purpose while injecting an excessively large amount of raw materials with the disadvantage of burdening consumers by creating a high cost through a complicated manufacturing process using only the raw materials as described above. In order to solve the conventional method of manufacturing a floor impact noise prevention material having inefficiency and the problems of the product, a predetermined ratio of particles, binders and foaming agents that are already pulverized waste tires, waste rubber, EVA, etc. After filling about 40 to 60% (inner mold volume ratio) in a mold having a specific shape in a state, it is heated as it is in a sealed state so that the raw materials filled in the mold are foamed so that the rubber particles forming a product are molded in an evenly spread state. This makes the overall size of the product larger by maintaining a smooth and uniform density. By cutting to a certain size according to the purpose of use, it is possible to improve productivity and reduce costs, as well as anticipate a definite blocking effect on floor impact noise, and reduce resources and environmental pollution by using waste materials as it is. It can bring the effect to prevent, and also the manufacturing method is also simple to provide a method of manufacturing the floor impact noise prevention material and the product that can significantly lower the production cost of the product.

1 is a process chart according to the manufacturing method according to the present invention

In order to achieve the above object, the present invention, in the manufacturing method of the floor impact noise prevention material, the main material is made of rubber particles by grinding waste rubber materials such as waste tires to a diameter of 0.4 ~ 6mm and a length of 2mm ~ 10mm ( The raw material in a state in which a raw material is formed by uniformly mixing 5 to 9% by weight of the member to be a binder (adhesive) and 0.1 to 0.7% by weight of the blowing agent to 90 to 95% by weight of the main material. After filling a mold having a specific shape by an amount corresponding to a mold internal volume ratio of 40 to 60%, the mold is sealed and heated at 130 to 200 ° C. for 7 to 20 minutes so that the raw material is in the mold inside the mold. The present invention provides a method of manufacturing a floor impact noise prevention material, and a floor impact noise prevention material manufactured therefrom, wherein the molded article is molded from a mold and then cut to suit the purpose.

In the present invention, the main material used as raw materials is pre-desulfurized rubber particles finely ground waste rubber such as waste tires or EVA using a grinder, and the size of the rubber particles is about 0.4 to 6 mm in diameter and 2 to 10 mm. When the size of the rubber particles is less than 0.4mm, the void ratio of the floor impact noise prevention material is excessively reduced, thereby reducing the elasticity and increasing the adhesion specific surface area. Conversely, there is a problem that the amount of use is greatly increased, on the contrary, when the size of the diameter is 6 mm or more, the adhesion specific surface area decreases, resulting in a decrease in adhesion force and cracking between rubber particles.

In addition, the binder as a member added to the base material of the rubber particles can be used in a liquid rubber paste such as polyurethane resin, chloroprene resin, latex or the like alone or in a mixed state, respectively, in the range of approximately 50g to 100g based on the base material 1000g. When added, the desired adhesion can be obtained.

In addition, a blowing agent added to impart foaming power to the main body and the member may be a conventional blowing agent, and an organic blowing agent such as azodicarbonamide (ADCA) or an inorganic blowing agent such as ammonium carbonate or sodium hydrogencarbonate may be used. The amount of these blowing agents can be used within the range of 2 ~ 8g based on the total weight of the raw materials.

Hereinafter, the present invention will be described in more detail by the following examples.

(Example)

The waste tire is pulverized as a grinder so that the size of the waste tire is about 0.4 to 2 mm, and the main material is formed. Then, the raw material is mixed uniformly as a blender by mixing 57 g of a member and 3 g of a blowing agent in 1000 g of the main material to form a raw material. Is filled in the mold by an amount corresponding to 50% of the volume ratio inside the mold, and then the mold is heated at 160 ° C. for 10 minutes while the mold is sealed to foam the raw materials partially filled in the mold to form the foamed molded product. Demolding from to prepare a floor impact noise prevention material having a specific form.

The floor impact noise prevention material of the present invention manufactured in this way is

The measured values of hardness of 45 HS, tensile strength of 5 kg / cm 2, elongation of 63%, compressive strength of 4 kg / cm 2, and elastic modulus of 55% were obtained.

As can be seen from the above measurement, the floor impact noise prevention material of the present invention shows excellent results in all the test items. As a result, the product according to the present invention is installed on the floor of the slab of the apartment house, It can be seen that this product is very suitable to fundamentally block various kinds of shock noise transmitted to the lower layer.

In the above configuration, EVA, PE foam, PE film and bitumen as necessary to more effectively block the floor impact noise on the upper surface of the floor impact noise prevention material according to the present invention, and also to act as sound insulation, insulation and water permeation prevention. It is also possible to attach and install a reinforcing material such as a predetermined thickness, the material of the reinforcing material may be used other than the above-mentioned materials.

As described above, although the present invention has been described with reference to the above embodiments, it is not necessarily limited thereto, and various modifications can be made without departing from the scope and spirit of the present invention.

As can be seen from the above description, according to the manufacturing method and the product of the floor impact noise prevention material of the present invention, waste tires, various waste rubbers or EVAs, which have already been used, are collected and crushed into rubber particles pulverized into fine particle sizes. After mixing and mixing the binder and the blowing agent, it is possible to obtain a specific type of the desired preventive material by heating in a state filled with only a part of the mold volume ratio, and together with saving the resources for recycling waste materials such as waste tires and waste rubber. In the process of raw material foaming, the foaming is performed so that it is naturally distributed evenly in the mold space, so that the rubber particles constituting the product are produced in a state where it is spread evenly without compromising the properties of the product locally. Better responsiveness to floor or floor impact Only be able to block the floor impact sound, not to provide beneficial effects such as excellent heat insulating effect to be able to improve the workability of the building.

Claims (3)

Waste rubber materials, such as waste tires, which are not desulfurized, are ground to a diameter of 0.4 to 6 mm and a length of 2 mm to 10 mm to form a main body made of rubber particles, and the binder is 90 to 95% by weight of the main material. 5 to 9% by weight of the member and 0.1 to 0.7% by weight of the foaming agent are uniformly mixed, and the raw material is filled into a mold having a specific form in a state in which the raw material is formed, and then filled in an amount corresponding to 40 to 60% of the mold volume ratio. Method of manufacturing floor impact noise preventing material, characterized in that the molded material is demolded from the mold after heating the mold for 7 to 20 minutes under the condition of 130 to 200 ° C. in a sealed state, and then molding the molded product from the mold. . Molds of a specific type are made of raw materials obtained by uniformly mixing between 5 and 9% by weight of the binder member and 0.1 to 0.7% by weight of the blowing agent in 90 to 95% by weight of the main material ground to a diameter of about 0.4 to 6 mm or about 2 to 10 mm. A floor shock noise preventing material, which is manufactured by demolding a molded product after partially filling the inside and heating it for 7 to 20 minutes at 130 to 200 ° C. in a sealed state so as to foam the raw material into a mold. The floor shock noise preventing material according to claim 2, wherein a reinforcing material comprising any one of EVA, PE foam, PE film, and bitumen is integrally attached and formed on the upper surface of the molded article by a predetermined thickness.