Nonwoven Material for Acoustic Insulation, and Process for Manufacture

2011 ◽  
Vol 129 (5) ◽  
pp. 3420
Author(s):  
James R. Gross
2011 ◽  
Vol 194-196 ◽  
pp. 471-475 ◽  
Author(s):  
Jin Jing Chen ◽  
Zheng Guo

The acoustic insulation and hydrophobic properties of a new non-woven material were analyzed and discussed in this paper. The new non-woven material absorbs sound energy to transfer into heat energy by friction between viscosity of air near fiber and fiber. The acoustic insulation properties of the new non-woven material, polyurethane foam and felt were measured. With the same thickness and half weight of felt, the sound absorption coefficient of non-woven was 20~30% higher than felt. Further more, with the same weight of felt, the sound absorption coefficient of non-woven was50~60% higher than felt. However, the sound absorption coefficients of non-woven materials with different thickness and weight were also discussed. The amount of the sound absorption coefficient gradient increased with the increase of thickness and frequency. Comparing the existing sound absorption materials, the new non-woven material has high sound absorption, light weight, hydrophobic property, workability, and flame resistance property. The non-woven material can improved thermal insulation and sound absorption by combining conventional non-woven with aluminum evaporated film.So the new nonwoven material has been widely applied in industries to reduce noises, especially in the car.


2021 ◽  
Vol 13 (15) ◽  
pp. 8523
Author(s):  
Rosemarie Garay ◽  
Francis Pfenniger ◽  
Miguel Castillo ◽  
Consuelo Fritz

Wood industrialization provides a contribution to timber-based building. The Chilean market is based on attributes such as the experience and trust of companies. The sales price, meeting deadlines and quality are attributes that have motivated buyers. There are more attributes to assess that are important for the client and market country: building materials and safety, sustainability, and environmental assessment. Some of these valuations are provided by certifications such as life cycle analysis, reduction of energy, water, gas consumption, thermal, acoustic insulation, fire resistance, etc. The objective is to propose an evaluation tool using sustainability indicators for prefabricated lumber-based buildings, using technical benefits of wood as an option for manufacturing prefabricated structures. They constitute references that can be integrated with international construction standards and with it, a process of improvement of the current standards for the housing solution and protection of the environment. The methodology is based on standards compliance levels, according to current, voluntary, or referential regulations, seeking to differentiate the market offer of prefabricated homes through quality indicators, benchmarking and sustainability. The results are an evaluation model synthesized into three tables according to the category evaluated: materials, products, or structures. It concludes that, to meet demand, the market must adapt its offer to new requirements where it does matter how the housing is produced, not only in the economic aspect, but also its impact on the social aspect and the environment and what it offers in terms of quality of life. The lumber-based building sector needs sustainability attributes indicators to potentiate the companies and start a differentiation business.


2015 ◽  
Vol 725-726 ◽  
pp. 146-152
Author(s):  
Anastasiia Fidrikova ◽  
Olga Grishina ◽  
Alexey Marichev ◽  
Artem Korsun

This paper describes an experimental study of the effect of basalt wool on the acoustic isolation of the floating floor. Calculations and comparison of options flooring with use of acoustic insulation layer and without are shown. Analysis of the results of calculations are made.


2006 ◽  
Vol 38 (1) ◽  
pp. 50-54 ◽  
Author(s):  
V. Yu. Mishakov ◽  
G. Ya. Slutsker ◽  
A. M. Stalevich

Author(s):  
Tao Yang ◽  
Xiaoman Xiong ◽  
Yuanfeng Wang ◽  
Rajesh Mishra ◽  
Michal Petrů ◽  
...  

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 408
Author(s):  
Anna Stepien

This paper describes the use of glass sand in the production of autoclaved bricks. Traditional autoclaved materials consist of SiO2, CaO, and H2O. The purpose of the tests is to analyze the possibility of using glass sand in autoclaved materials and to determine their properties and durability. Depending on the structure, building materials can have porosities ranging from 0% (glass, metals) to over 90% (thermal insulation materials such as aerated concrete). Porosity of materials is directly related to the strength of materials and their density, and further to the thermal and acoustic insulation properties of products used especially for external wall construction, i.e., bricks, concrete, and aerated concrete. This type of silicate brick is formed at a temperature of 203 °C, therefore the dominant phase forming the microstructure is tobermorite, in contrast to the C-S-H phase, which dominates in concretes and which is characterized by a larger specific surface. The nature of pores, their number, appearance and arrangement in the material can be studied using computer techniques (SEM, XRD, computed tomography, porosimetry). Computed tomography (micro-CT analysis) showed that the number of voids in the material modified by glass sand is about 20% in relation to the weight of the product. The density of the product with glass sand was determined to be 2.2 kg/dm3.


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