Cross-sectional structure of wooden sound-absorbing board:
The principle of the sound-absorbing board: there are many small holes on the surface of the sound-absorbing board. After the sound enters the small hole, it will be randomly reflected in the inner wall of the structure like a sponge, until most of the energy of the sound wave is consumed, and it becomes heat energy. The effect of sound insulation.
The sound-absorbing panel contains many small gaps, which have a sound-absorbing effect on sound waves, especially those with frequencies above 600 Hz.
Features
It has the characteristics of light material, invariable shape, high strength, beautiful shape, elegant color, good decorative effect, strong three-dimensional sense and easy assembly.
Science and technology industry-a variety of materials are reasonably matched according to acoustic principles, have excellent noise reduction and sound absorption performance, and are particularly good for medium and high frequency sound absorption.
Art products-not only natural wood texture, simple and natural; but also a bright and bright style that reflects the modern rhythm, the product is very decorative, can be decorated with natural wood grain, patterns and other decorative effects according to needs, providing good Visual enjoyment.
Environmentally friendly products-All materials comply with national environmental protection standards, low formaldehyde content, products also have natural wood aroma. It has the highest wood fire rating B1. This has been tested by the national authority.
Easy installation-standardized module design, using slot, keel structure, easy and fast installation.
Industrial production-change the extensive production of traditional building materials, use fully automatic computer control equipment, large-scale standardized production, that is, to improve production capacity, but also to ensure product quality.
Factory sales expandable polymeric beads Sheet Sandwich Panels STMMA Slab board for Lost form casting
The Advantage of using the STMMA instead of EPS
Pure EPS: 100% polystyrene, pentane7%
STMMA-FD:90%polystyrene+10%MMA, pentane>7%
Decomposition and gasification chemical formula when pouring metal melt:
EPS: C8H8=8C+4H2
STMMA:C5O4H8=3C+2CO2+4H2
From the formula, you will see why residues are more in EPS. And whatever additive you added to EPS, it wont change the main formula.
Formula Solutions:
1.) STMMA series are focused on carbon rising defect in castings and with less residues, low dissolution temperature
2.) The STMMA-FD series have great advantages in solving fold defect by aluminum casting and applications in iron castings having excessive lustrous carbon, porosity defect solved.
*Typical Application means we have tested in this kind of metal, metals beyond that are according to be actually used.
