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Insulation materials and their thermal properties

Thermal insulation is the reduction of heat transfer (the transfer of thermal energy between objects of differing temperature) between objects in thermal contact. It is commonly used as a insulation sheet.


The most important aspect of an insulation material is its performance – that it consistently provides the designed-for resistance to the passage of heat throughout the lifetime of the building. Though the insulation manufacturer's published performance expectations will be an essential guide, other factors associated with the "real-life" installation of the material need to be considered as part of the design process:

? Ease of installation – the ultimate performance will be determined by how effectively a builder can install a material using conventional skills. For example, insulation slabs need to be installed so that no gaps result either between adjoining slabs, or between the slabs and other construction components that form part of the overall insulation envelope, such as rafters or joists. Any gaps left over will enable the passage of air and result in a reduction in performance.

? Shrinkage, compaction, settlement – Some materials are likely to suffer a degree of dimensional instability during their installed life. In many instances this is anticipated and can be overcome through careful design and installation methods. In all other instances, the specifier should seek guidance concerning associated risks from the insulation manufacturer – particularly where materials have not had an established record of installed performance.

? Protection against moisture – some insulation materials will suffer a degradation of performance when moist or wet. The designer should, through careful detailing, ensure that vulnerable insulation is protected from moisture. If moisture is a high risk (ingress or over 95% RH), then a suitably resistant material should be specified.

Except for insulation material, fiberglass is a great material as well, for example there is GPO-3/UPGM203 fiberglass mat sheet. A fiberglass is a form of fiber-reinforced plastic where glass fiber is the reinforced plastic. This is the reason perhaps why fiberglass is also known as glass reinforced plastic or glass fiber reinforced plastic. The glass fiber is usually flattened into a sheet, randomly arranged or woven into a fabric. According to the use of the fiberglass, the glass fibers can be made of different types of glass.

Fiberglass is lightweight, strong and less brittle. The best part of fiberglass is its ability to get molded into various complex shapes. This pretty much explains why fiberglass is widely used in bathtubs, boats, aircraft, roofing, and other applications.

Types and forms of fiberglass:

Depending on the raw materials used and their proportions to make fiberglass, fiberglass can be classified into following major types:

A-glass: A glass is also called as alkali glass and is resistant to chemicals. Due to the composition of A glass fiber, it is close to window glass. In some parts of the world, it is used to make process equipment.

C-glass: C-glass offers very good resistance to chemical impact and is also called as chemical glass.

E-glass: It is also called as electrical glass and is a very good insulator of electricity.

AE-glass: This is alkali resistant glass.

S glass: It is also called as structural glass and is known for its mechanical properties.

There are also some products like CNC machining partsFRP pultruded profile and sheet molding compound product may using similar materials.

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