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KR-20260065581-A - INTERFLOOR NOISE INSULATION

KR20260065581AKR 20260065581 AKR20260065581 AKR 20260065581AKR-20260065581-A

Abstract

An embodiment provides an interlayer sound insulation material comprising: a first sound-absorbing member having a first storage modulus; and a second sound-absorbing member disposed on the first sound-absorbing member and having a second storage modulus different from the first storage modulus.

Inventors

  • 조희진
  • 문갑수

Assignees

  • 피유코어 주식회사

Dates

Publication Date
20260508
Application Date
20251031
Priority Date
20241101

Claims (10)

  1. A first sound-absorbing member having a first storage modulus; and An interlayer sound insulation material comprising: a second sound-absorbing member disposed on the first sound-absorbing member and having a second storage modulus different from the first storage modulus.
  2. In claim 1, the difference between the first storage modulus and the second storage modulus is 0.01 MPa to 0.05 MPa, and the first storage modulus and the second storage modulus are interlayer sound insulation materials measured at 1 Hz and 25°C.
  3. An interlayer sound insulation material according to claim 2, wherein the first storage modulus is greater than the second storage modulus, the first storage modulus is 0.011 MPa to 0.016 MPa, and the second storage modulus is 0.08 MPa to 0.012 MPa.
  4. In claim 3, an interlayer sound insulation material further comprising a support member disposed on the second sound-absorbing member.
  5. An interlayer sound insulation material according to claim 1, wherein the first sound-absorbing part has a first loss modulus and the second sound-absorbing part has a second loss modulus different from the first loss modulus.
  6. In claim 5, the first loss modulus is greater than the second loss modulus, the first loss modulus is 0.04 MPa to 0.08 MPa, the second loss modulus is 0.005 MPa to 0.02 MPa, and the first loss modulus and the second loss modulus are interlayer sound insulation materials measured at 1 Hz and 25°C.
  7. In claim 6, the difference between the first loss modulus and the second loss modulus is 0.03 MPa to 0.08 MPa, an interlayer sound insulation material.
  8. In claim 1, the first sound-absorbing part has a first Tanδ, and the second sound-absorbing part has a second Tanδ different from the first Tanδ, The above first Tanδ and the above second Tanδ are interlayer sound insulation materials measured at 1 Hz and 25℃.
  9. In claim 8, the first Tanδ is greater than the second Tanδ, the first Tanδ is 0.35 to 0.55, the second Tanδ is 0.05 to 0.2, and the first Tanδ and the second Tanδ are interlayer sound insulation materials.
  10. In claim 9, the difference between the first Tanδ and the second Tanδ is 0.1 to 0.8, for an interlayer sound insulation material.

Description

Interfloor Noise Insulation The embodiment relates to an interlayer sound insulation material. Along with changes in housing conditions, securing housing performance to protect users (residents) is emerging as a major issue both domestically and internationally. In particular, Japan enacted the "Quality Assurance Promotion Act" in 2000 and is encouraging rational housing supply and consumption based on consumer choice by publicly disclosing quality during the housing supply process. Domestically, an objective housing quality labeling system has also been introduced to induce overall quality and performance improvements in multi-unit housing, thereby meeting the public's demand for improved housing quality and enhancing individual asset values. This not only contributes to the sound development of the housing industry at the national level but also promotes the advancement of housing construction technology and the housing industry, enabling the public to select housing while knowing its quality and performance in advance. The current industry is conducting various research and development efforts to address the issue of floor impact noise, which is emerging as a major factor degrading the residential environment of multi-unit housing, in order to construct multi-unit housing that complies with regulations. In particular, the development of various soundproofing materials equipped with both thermal insulation and impact noise reduction functions for floor slabs is actively underway. As a few examples regarding sound insulation materials, Korean Registered Patent No. 166993 discloses a floor construction method in which a rubber material mixed with an adhesive substance is laid on a slab, a polyethylene foam sponge is laminated on top of it to form a barrier layer, and then a flooring material is formed on the foam sponge. Additionally, Korean Published Patent No. 2006-38862 discloses a thermoplastic foam having a foaming ratio of 5 to 200 times and foam cells of a specific diameter, which can be used as a sound insulation material for inter-floor noise in buildings. All of the aforementioned prior art technologies utilize resin foam as a component for reducing inter-floor noise. Such resin foam has long been installed for purposes such as thermal insulation or cushioning, and examples include foams made of polyethylene, polystyrene, or polyvinyl chloride. However, while such conventional foams achieve a certain degree of thermal insulation or shock cushioning, their effectiveness in absorbing, dispersing, and dissipating floor impact sound—a major cause of inter-floor noise—has not been satisfactory. Meanwhile, Korean Public Patent No. 2008-0027177 was developed to improve the above-mentioned problems and relates to an interlayer sound insulation material comprising an open-cell containing resin foam having an open-cell ratio of 20% or more (including 60% or more and 80% or more) and a dynamic elastic modulus of 0.5 to 10 MN/㎥, which is said to be effective in absorbing and dissipating noise and vibration caused by impact. FIG. 1 is a perspective view illustrating an interlayer sound insulation material according to an embodiment. Figure 2 is a cross-sectional view showing a cross section cut along A-A' in Figure 1. FIG. 3 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 4 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 5 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 6 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 7 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 8 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 9 is a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 10 is a drawing showing a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 11 is a drawing showing a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 12 is a drawing showing a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 13 is a drawing showing a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 14 is a perspective view illustrating an interlayer sound insulation material according to another embodiment. FIG. 15 is a perspective view illustrating the support member. FIG. 16 is a cross-sectional view showing a cross section cut along B-B' in FIG. 14. FIG. 17 is a drawing showing a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 18 is a drawing showing a cross-section of an interlayer sound insulation material according to another embodiment. FIG. 19 is a drawing