Heat insulating material for ship:
Heat insulating material for ship used of inorganic E-glass fiber, and the main ingredient is SiO2 and Al2O3 This product uses E-type fiberglass roving as raw materials while each strand is chopped into a 2~3 inch fraction via a fiber cutting machine and further decomposed into extreme tiny blanket shape through the cotton carding machine. Subsequently, the needled fabrics are ceaselessly sewn by thousands of needles. There is much gap between fibers. So it is excellent for heat preservation and insulation characteristics, and it also has a good sound-absorbency effect to low frequency and vibration noise, which is advantageous in the reduction of noise pollution and improvement of working conditions. There is no binder in the products. So it is different from other wool products, like Centrifugal glass wool and rock-wool. It can bear high temperature and it don’t emit any smell when heat it. It doesn’t have any harm to man’s body. It's also excellent for electrically insulating.
1. Heat Resistance and Specification
It can resist high temperature of 700℃, 850℃ and 1000℃ and be cut into different thickness (2mm~30mm) according to the requirements of customers.
2. Excellent Heat Insulation
According to physical principle, the thermal conductivity rate of gas is smaller than that of solid.? For excellent heat insulation materials, there should be many air pockets inside the materials. As an excellent heat insulation material, the glass fiber cotton has innumerable tiny air pockets, and its fibers are arranged irregularly with a thermal conductivity coefficient between 0.2~0.040 kcal/mhr℃.
3.Noncombustible Material
The main element of glass fiber is silicide (over 50%) which is noncombustible and will not deform or embrittle even under high temperature for 3 consecutive hours.
4. Good Sound Absorption
When the sound wave enters the glass fiber cotton, its energy will be absorbed by the cotton due to the friction between fibers and different sizes of air pockets.? Generally speaking, the sound absorbing coefficient of the glass fiber cotton is higher than 90%. Therefore, it is a good material for preventing the interference of noise.
5. High Insulation
Glass fiber is the best insulation material because it is able to resist high temperature and has good mechanical property and high chemical stability.
6.Anticorrosion
Glass fiber can resist corrosion of strong acid and alkali.Its functions will not be diminished after long-term use.
7.Good Restoring Force
Glass fiber contains countless air pockets, so it has excellent restoring force to resist any impact and vibration with a tensile strength over 1.0 kg.
8.Low Moisture Absorption Rate
Its moisture absorption rate is usually close to zero.
9.Lightweight and Soft Material
In comparison with the other heat insulation materials, glass fiber products are the lightest and softest material.? If installed on machinery, it can help reduce the burden of weight and vibration.
10.Simple and Easy Construction
It is simple and easy to use glass fiber for all kinds of thermal insulation, heat insulation, refractory and sound absorbing engineering or products.
Application:
1. Building: for roofing, flooring and wall’s thermal and acoustical insulation, guarantee the building object be the energy-saving type.
2. Ship and automobiles: replace the structure and shell body of the metal and pure plastic wooden materials, reduce the needed driving force, save energy, extend the life.
3. Heat insulation for industry equipment, parts and duct and household electrical appliances
4. Aviation and space flight: thermal and acoustic insulation for thin panel and nail-board by fire-proofing fabrics, used for the thermal insulation and sound absorption of engine system, Absorbing noises and purifies the tail gas.
5. Traffic: widely used in railway, highway, sports ground, water construction, environment-protection project, would shorten the construction period, extend the using life
Fibreglass Needle Mat Property
Thermal and Optical Properties | Fiberglass is inorganic fiber and will not combustion |
Thermal Expansion Coefficient：4.8*10-6cm/cm/℃ |
Specific heat：0.19cal/g℃ |
Thermal conductivity Coefficient： 0.040w/cm.k |
Heat Resistant Temp: 700℃ |
Conversion Rate（25℃）：1.55 |
Mechanical Properties | Fiberglass has high tensile strength and good stability in length |
Tensile Strength：350kg/mm2 |
Elastic Modulus：7300kg/mm2 |
Horizontal Tensile Strength：35.6N/50mm |
Vertical Tensile Strength：97.2N/50mm |
Conductance | Fibreglass have good electric insulation |
Permittivity：102Hz104Hz-6.32, 1010Hz-6.11 |
Loss Tangent: 102Hz-0.0042, 102Hz-0.006 |
Volume Resistivity：1010Ωcm, |
Corrosion | Fibreglass will not absorb water, will not contribute to metal corrosion and will not decay |
Fiberglass Chemical Composition（Weight％） |
SiO2 | Al2O3 | CaO | MgO | B2O3 | Impurity |
R2O | Fe2O3 | Other |
54.1±0.5 | 14.6±0.4 | 16.6±0.3 | 4.6±0.3 | 8.8±0.5 | ＜0.8 | ＜0.5 | Allowance |
Fiberglass Thermal Conductivity：
Temperature（℃） | 25° | 100° | 200° | 300° | 400° | 500° | 600° | 700° |
Thermal Conductivity （kcal/mhr℃） | 0.030 | 0.037 | 0.048 | 0.058 | 0.076 | 0.094 | 0.112 | 0.16 |
Fibreglass Absorption and Vibration Property：
（Hz） | 125 | 250 | 500 | 1000 | 2000 | 4000 |
sound absorption coefficient | 0.32 | 0.76 | 0.94 | 0.96 | 0.95 | 0.98 |
