KR100873990B1 - The material composition to reduce noise between floors - Google Patents

Abstract

A composition for reducing inter-layer sound containing waste polyester cord yarn and polyvinyl chloride awning yarn as a main raw material is provided to be used for a material for reducing inter-layer sound of building, an adiabatic material and a vibration sound-absorbing material. A composition for reducing inter-layer sound comprises waste polyester cord yarn extracted from waste tire; and polyvinyl chloride powder extracted from waste awning yarn. The composition for reducing inter-layer sound comprises 45-70 parts by weight of awning yarn containing polyvinyl chloride powder and fiber powder; 30-55 parts by weight of waste polyester cord yarn; and 7~15 parts by weight of a binder based on 100 parts by weight of the total component filling a part of the air gap of fiber.

Description

Interlayer Noise Material Composition {THE MATERIAL COMPOSITION TO REDUCE NOISE BETWEEN FLOORS}

The present invention relates to an interlayer noise absorbing material composition containing tent yarns and cord yarns extracted from waste tents and waste tires, and more specifically, waste polyester cord yarns (hereinafter, polyester yarns obtained by pulverizing waste tires and poly Fiber reinforcement cord yarns such as amide-based or strong dogs are collectively referred to as 'waste polyester cord yarns') and polyvinyl chloride tent yarns as main raw materials. It relates to an interlayer noise absorbing material composition which can be used as such.

In general, polyester fiber is a high-density fiber having a non-combustible and heat-insulating effect to form a polymer by connecting an ester group, and these polyester-based synthetic fibers are porous, not brittle, light in weight, and flexible in comparison with glass fibers. When used together with abundant and other composite materials, there is almost no heat transfer phenomenon, so it has high thermal insulation effect and sound absorption performance, and is used in various fields such as automobile tire cords.

Automobile tires are made of general hard rubber on the outside and reinforcement yarns made of specially processed fibers such as polyester yarns, polyamide-based or strong dogs. Therefore, when the tire fulfills its mission, the tire is pulverized to reduce the environmental pollution while recycling the high-grade rubber material of the tire. The rubber material generated during the crushing of the waste tire is used to provide elastic materials, That is, many related technologies such as elastic ascon material on the road surface, elastic material sidewalk block and urethane chip sidewalk block have been developed and recycled in various ways.

 However, waste polyester cord yarn, which is an inner fiber reinforced rubber layer discharged with waste rubber, rarely melts or blends with other materials, and when ignited and incinerated, it emits toxic substances and causes environmental damage. It is a waste that must be relied on, and its use is not found.

Tents, on the other hand, are divided into relatively inexpensive PE sheets and relatively expensive PVC tarpaulins. In the case of PE sheet, since most of the composition is high density polyethylene (HDPE), it is smoothly used because it is chemically decomposed and remelted at the time of disposal. However, in case of PVC tarpaulin, it is composed of 55% polyvinyl chloride (PVC) and 45% fiber fabric (base fabric).

The polyvinyl chloride is recycled as a raw material for injection to manufacture recycled PVC products in addition to the separate collection after pulverizing the waste tent, but it causes a lot of problems due to the generation of chlorine gas harmful to the human body during regeneration injection work.

The rest of the textile fabric is composed of cotton and polyester-staple fibers in a pulverized state, and until now, a proper recycling method has not been devised, and is discarded by landfill or incineration.

Therefore, the recycling of waste tires and waste curtains of automobiles has emerged as a task that must be solved promptly in terms of efficient recycling of resources and environmental conservation.

The present invention has been made to solve the above problems and problems, the present invention is to recycle the polyester cord yarn extracted from the tent yarns and waste tires containing polyvinyl chloride and fiber components generated during the disposal of the tents, etc. The purpose of the present invention is to provide an interlayer noise absorbent composition which can be utilized as a raw material of sound insulation or interlayer noise absorber which can block the noise transmitted from the upper floor to the lower floor in apartments such as apartments.

The present invention for achieving the above object is the whole of the interlayer noise absorbing material composition containing as a constituent the waste polyester cord yarn extracted from waste tires and the tent yarn containing polyvinyl chloride powder and fiber powder extracted from waste tent barn yarn Provided is an interlayer noise absorbing material composition comprising 45 to 70 parts by weight of tent yarn containing polyvinyl chloride powder and fiber powder, and 30 to 55 parts by weight of waste polyester cord yarn, based on 100 parts by weight of the component.

The interlayer sound absorbing material composition of the present invention may further implement another embodiment by further including 7 to 15 parts by weight of a binder capable of filling some of the pores of the fiber while maintaining the flexibility of the fiber included in the tent yarn and the cord yarn. have.

According to the present invention, thermal conductivity, dynamic modulus, physical properties, stability, noise and vibration reduction, quality improvement and uniformity, manufacturing and construction cost reduction, competitive advantage with other products, manufacturing time improvement, productivity improvement, workshop It is useful to be able to contribute to the improvement of the environment.

Hereinafter, a preferred embodiment of the interlayer sound absorbing material composition containing the tent yarn and cord yarn according to the present invention will be described in detail.

The interlayer noise absorbent composition according to the present invention is the whole of the interlayer noise absorbent composition containing as a constituent the waste polyester cord yarn extracted from the waste tire and the tent yarn containing the polyvinyl chloride powder and the fiber powder extracted from the waste tent curtain yarn. It is comprised including 45-70 weight part of tent yarns containing polyvinyl chloride powder and a fiber powder, and 30-55 weight part of waste polyester cord yarns with respect to 100 weight part of components.

Among each of the ingredient materials, tent yarn is a low specific gravity and bulky raw material, and cord yarn is a high specific gravity and small bulk raw material. Therefore, when the composition ratio of each ingredient material exceeds the upper limit or the lower limit of the raw materials used, it becomes difficult to meet the requirements of the heat transmission rate in the bulkhead or the floor shock sound insulation structure approval and management standards. Not suitable

That is, when the composition of the tent yarn is higher than the upper limit, the amount of binder is increased by increasing the volume of the tent yarn, and the molding time and the stirring time increase. In addition, low-density products that occupy a large portion of tent yarns are relatively advantageous in reducing interlayer noise, but the volume of the tent yarn is increased within a limited volume, thereby reducing the elasticity of the overall product, thereby lowering the interlayer noise reduction performance.

On the contrary, when the composition of the tent yarn is lower than the lower limit, the cord yarn is relatively high in proportion to the elasticity and the elasticity is low. It is difficult to meet the standard thermal permeability. In addition, the cord yarn is relatively half the volume (based on the unit weight) of the tent yarn, it is difficult to maintain a certain shape of the product. Therefore, it is preferable to adjust within the said range.

The interlayer noise absorbing material composition according to the present invention further comprises 7 to 15 parts by weight of the binder yarn and 45 to 70 parts by weight of the tent yarn and 30 to 55 parts by weight of the polyester cord yarn, It can be formulated to fill some of the plurality of pores formed by the two fiber components while maintaining flexibility.

As the binders used in the present invention, rubber-based binders may be used, desired properties may be obtained when used amounts of about 7 to 15 parts by weight of the total amount of the total components in which the used polyester cord yarn and the tent yarn are mixed are used. Where the binder is lower than the lower limit, it is difficult to mix the other raw materials, and if the binder exceeds the upper limit, the consumption may increase to increase the cost, it is preferably adjusted within the above range.

At this time, the binder is preferably used having a viscosity (cp) in the range of 1000 ~ 2500, it is preferable to use a mixture that is sprayed by the water vapor particle size through an injector. More preferably, a spray nozzle having a diameter of 2.5 ± 0.5 mm is provided to spray the binder particles having the size of water vapor particles, and sprayed through an injector having a discharge pressure of 2 to 3 kg / cm ² .

Hereinafter, preferred embodiments will be presented to assist in understanding the present invention. However, this embodiment is presented only to better understand the present invention and the present invention is not limited to the embodiment.

Example 1

70 parts by weight of tent yarn containing polyvinyl chloride powder and fiber powder and 30 parts by weight of waste polyester cord yarn were added to a stirrer and stirred, respectively, with respect to 100 parts by weight of the total components, and the size of the water vapor particles through the injector to the stirrer. 11 parts by weight of the binder was sprayed for 4 minutes, and the interlayer noise absorbent composition was mixed.

In the above embodiment, the binder was a rubber binder having a viscosity of 2000 cps, and the stirring was performed while spraying the binder at a pressure of ² kg / cm ² through a spray nozzle having a diameter of 2.5 mm, and an interlayer noise material was prepared from the stirred mixture.

Example 2

In Example 1 was carried out in the same manner as in Example 1 except that 65 parts by weight of tent yarn, 35 parts by weight of waste polyester cord yarn, 10 parts by weight of binder.

Example 3

In Example 1 was carried out in the same manner as in Example 1 except for mixing 60 parts by weight of tent yarn, 40 parts by weight of waste polyester cord yarn, 10 parts by weight of binder.

Comparative Example 1

Example 1 was carried out in the same manner as in Example 1 except that 90 parts by weight of the tent yarn, 10 parts by weight of the waste polyester cord yarn, and 12 parts by weight of the binder were mixed.

Comparative Example 2

The same process as in Example 1 was performed except that 80 parts by weight of tent yarn, 20 parts by weight of waste polyester cord yarn, and 12 parts by weight of binder were mixed.

Comparative Example 3

The same process as in Example 1 was carried out except that 25 parts by weight of tent yarn, 75 parts by weight of waste polyester cord yarn, and 8 parts by weight of binder were mixed.

Comparative Example 4

Except for mixing 100 parts by weight of waste polyester cord yarn, 7 parts by weight of the binder in Example 1 was carried out in the same manner as in Example 1.

The results of measuring the thermal conductivity and the thermal permeability of the interlayer noise absorbing material prepared according to Examples 1 to 3 and Comparative Examples 1 to 4 are shown in Table 1, and prepared according to Examples 1 to 3 and Comparative Examples 1 to 4. Table 2 shows the results of measuring the dynamic modulus of the interlaminar noise absorber and the dynamic modulus after heating.

Test Example Composition ratio (part by weight) (barracks: cord yarn) Binder (parts by weight) Thermal Conductivity (W / mK) Heat transmission rate (Wm ² k) Pass or fail Heat transmission rate reference value (Wm ² k) Comparative Example 1 90:10 12 0.0054 0.850 x 0.81 or less (Thermal conductivity must be 0.049 or less to be 0.81 or less) Comparative Example 2 80:20 12 0.0052 0.835 x Example 1 70:30 11 0.0042 0.749 0 Example 2 65:35 10 0.0045 0.777 0 Example 3 60:40 10 0.0048 0.803 0 Comparative Example 3 25:72 8 0.0064 0.918 x Comparative Example 4 0: 100 7 0.0086 1.031 x

Test Example Composition ratio (part by weight) (barracks: cord yarn) Binder (parts by weight) Dynamic modulus of elasticity (MN / m ³ ) Dynamic modulus of elasticity after heating (MN / m ³ ) Pass or fail Dynamic modulus reference value (MN / m ³ ) Comparative Example 1 90:10 12 43 39 x Dynamic modulus: 40 or less, dynamic modulus after heating: not to exceed 30% of dynamic modulus before heating Comparative Example 2 80:20 12 24 22 0 Example 1 70:30 11 6 6 0 Example 2 65:35 10 10 9 0 Example 3 60:40 10 14 11 0 Comparative Example 3 25:72 8 13.8 14.4 0 Comparative Example 4 0: 100 7 49.6 72 x

In the results of Table 1 and Table 2, the interlayer noise absorbing material (Examples 1 to 3) manufactured within the composition range of the present invention using a tent yarn, a cord yarn and a rubber binder has thermal conductivity, thermal permeability, and dynamic modulus of elasticity. It can be seen that the dynamic modulus of elasticity after heating with meets the management standard. In Comparative Examples 1 to 4, it can be seen that the thermal conductivity and the thermal permeability are not suitable because they deviate from the reference values. In particular, in Comparative Examples 2 and 3, the elastic modulus and the dynamic modulus after heating are suitable for the management criteria. It can be seen that the thermal conductivity and the thermal permeability are not suitable to deviate from the reference value.

As described above, according to the interlayer noise absorbing material composition according to the present invention, the tent yarn and the waste polyester cord yarn containing the polyvinyl chloride powder and the fiber powder can be recycled as useful resources, thereby reducing the waste disposal cost by recycling the waste. It will bring about the restraining effect on the use of various materials that cause environmental pollution.

As described above, the preferred embodiment of the present invention has been described, but the present invention may use various changes, modifications, and equivalents. Therefore, the above description does not limit the scope of the invention defined by the limitations of the following claims.

Claims (5)

Polyvinyl chloride based on 100 parts by weight of the total components of the interlayer sound absorbing material composition containing waste polyester cord yarn extracted from waste tire and tent yarn containing polyvinyl chloride powder and fiber powder extracted from waste tent barn An interlayer noise absorbing material composition comprising 45 to 70 parts by weight of tent yarn containing powder and fiber powder, and 30 to 55 parts by weight of waste polyester cord yarn. The method of claim 1, The interlayer sound absorbing material composition, characterized in that it further comprises 7 to 15 parts by weight of a binder that can fill some of the pores of the fiber while maintaining the flexibility of the fiber contained in the tent yarn and cord yarn. The method of claim 2, 7 to 15 parts by weight of the binder is an interlayer noise absorbing material composition, characterized in that it has a viscosity (cp) in the range of 1000 to 2500. The method of claim 2, 7 to 15 parts by weight of the binder is an interlayer noise absorbing material composition, characterized in that the spray is mixed with a water vapor particle size through an injector. The method of claim 2, The binder 7 ~ 15 parts by weight is provided with a spray nozzle of 2.5 ± 0.5mm in diameter, the interlayer sound absorbing material composition, characterized in that sprayed through an injector having a discharge pressure of 2 ~ 3kg / cm ² .