Why is safety stability glass wool Better?

Insulating material made from fibers of glass

Link to huamei

This article is about the thermal insulation material composed of glass fibers bonded loosely in a way to trap air. For the plastic composite of glass fiber and polymer plastic used as structural reinforcement, see fiberglass . For the glass fiber itself, also sometimes called fiberglass, see glass fiber

Glass wool is an insulating material made from glass fiber arranged using a binder into a texture similar to wool. The process traps many small pockets of air between the glass, and these small air pockets result in high thermal insulation properties. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated. The modern method for producing glass wool was invented by Games Slayter while he was working at the Owens-Illinois Glass Co. (Toledo, Ohio). He first applied for a patent for a new process to make glass wool in .[1]

Principles of function

Gases possess poor thermal conduction properties compared to liquids and solids[2][3] and thus make good insulation material if they can be trapped in materials so that much of the heat that flows through the material is forced to flow through the gas.[4] In order to further augment the effectiveness of a gas (such as air) it may be disrupted into small cells which cannot effectively transfer heat by natural convection. Natural convection involves a larger bulk flow of gas driven by buoyancy and temperature differences, and it does not work well in small gas cells where there is little density difference to drive it, and the high surface area to volume ratios of the small cells retards bulk gas flow inside them by means of viscous drag.

In order to accomplish the formation of small gas cells in man-made thermal insulation, glass and polymer materials can be used to trap air in a foam-like structure. The same principle used in glass wool is used in other man-made insulators such as rock wool, Styrofoam, wet suit neoprene foam fabrics, and fabrics such as Gore-Tex and polar fleece. The air-trapping property is also the insulation principle used in nature in down feathers and insulating hair such as natural wool.

Manufacturing process

Natural sand and recycled glass are mixed and heated to 1,450 °C (2,640 °F), to produce glass. The fiberglass is usually produced by a method similar to making cotton candy. Molten glass is forced through a rapidly spinning metal cup, called a 'spinner'. The centrifugal force pulls the glass through small holes in the spinner. The newly created fibers cool on contact with the air.[5] Cohesion and mechanical strength are obtained by the presence of a binder that &#;cements&#; the fibers together. A drop of binder is placed at each fiber intersection. The fiber mat is then heated to around 200 °C (392 °F) to polymerize the resin and is calendered to give it strength and stability. Finally, the wool mat is cut and packed in rolls or panels, palletized, and stored for use.

Uses

Glass wool is a thermal insulation material consisting of intertwined and flexible glass fibers, which causes it to "package" air, resulting in a low density that can be varied through compression and binder content (as noted above, these air cells are the actual insulator). Glass wool can be a loose-fill material, blown into attics, or together with an active binder, sprayed on the underside of structures, sheets, and panels that can be used to insulate flat surfaces such as cavity wall insulation, ceiling tiles, curtain walls, and ducting. It is also used to insulate piping and for soundproofing.

Fiberglass batts and blankets

Batts are precut, whereas blankets are available in continuous rolls. Compressing the material reduces its effectiveness. Cutting it to accommodate electrical boxes and other obstructions allows air a free path to cross through the wall cavity. One can install batts in two layers across an unfinished attic floor, perpendicular to each other, for increased effectiveness at preventing heat bridging. Blankets can cover joists and studs as well as the space between them. Batts can be challenging and unpleasant to hang under floors between joists; straps, or staple cloth or wire mesh across joists, can hold it up.

Gaps between batts (bypasses) can become sites of air infiltration or condensation (both of which reduce the effectiveness of the insulation) and require strict attention during the installation. By the same token careful weatherization and installation of vapour barriers is required to ensure that the batts perform optimally. Air infiltration can be also reduced by adding a layer of cellulose loose-fill on top of the material.

Health problems

Fiberglass will irritate the eyes, skin, and the respiratory system. Potential symptoms include irritation of eyes, skin, nose, and throat, dyspnea (breathing difficulty), sore throat, hoarseness and cough.[6] Fiberglass used for insulating appliances appears to produce human disease that is similar to asbestosis.[7] Scientific evidence demonstrates that fiberglass is safe to manufacture, install and use when recommended work practices are followed to reduce temporary mechanical irritation.[8] Unfortunately these work practices are not always followed, and fiberglass is often left exposed in basements that later become occupied. Fiberglass insulation should never be left exposed in an occupied area, according to the American Lung Association.

In June , the United States' National Toxicology Program (NTP) removed from its Report on Carcinogens all biosoluble glass wool used in home and building insulation and for non-insulation products.[9] Similarly, California's Office of Environmental Health Hazard Assessment ("OEHHA"), in November , published a modification to its Proposition 65 listing to include only "Glass wool fibers (inhalable and biopersistent)."[10] The United States' NTP and California's OEHHA action means that a cancer warning label for biosoluble fiber glass home and building insulation is no longer required under Federal or California law. All fiberglass wools commonly used for thermal and acoustical insulation were reclassified by the International Agency for Research on Cancer (IARC) in October as Not Classifiable as to carcinogenicity to humans (Group 3).[11]

Fiberglass itself is resistant to mold. If mold is found in or on fiberglass it is more likely that the binder is the source of the mold, since binders are often organic and more hygroscopic than the glass wool. In tests, glass wool was found to be highly resistant to the growth of mold. Only exceptional circumstances resulted in mold growth: very high relative humidity, 96% and above, or saturated glass wool, although saturated wool glass will only have moderate growth.[12][13]

See also

References

Mar. 27,

Glass wool has many advantages such as non-combustibility, non-toxicity, corrosion resistance, small bulk density, low thermal conductivity, strong chemical stability, low moisture absorption, good hydrophobicity, etc. It is currently recognized as a superior thermal insulation, heat insulation and sound absorbing material. Wide range of uses. The boards, felts and pipes made of this material have been widely used in the fields of construction, chemical industry, electronics, electric power, metallurgy, energy, transportation and other fields for thermal insulation, sound absorption and noise reduction, and the effect is very significant. Glass Wool Manufacturer introduces the advantages of glass wool.

1. Thermal insulation

Huamei glass wool slag ball has low content and slender fibers, which can effectively confine air and make it unable to flow, preventing convective heat transfer of air, greatly reducing the thermal conductivity of the product, and at the same time rapidly attenuating the transmission of sound. Excellent thermal insulation, sound absorption and noise reduction.

2. Good thermal stability

Huamei glass wool has good high-temperature thermal stability, durability and ability to resist high-temperature shrinkage; it can maintain safety, stability and high performance for a long time in the recommended operating temperature range and under normal working conditions.

3. Different lasting moisture resistance

Hydrophobicity is the ability of a material to resist water penetration. Huamei glass wool has a water-repellent rate of not less than 98%, which makes it have more consistent and stable thermal insulation performance.

4.Good fire resistance

Tested in accordance with GB -, Huamei glass wool is a non-combustible Grade A material.

Glass Wool

Finally, the Rubber Foam Insulation Factory will introduce the precautions for glass wool construction.

Roof construction

1. When laying glass wool roll felt, the veneer faces the indoor side and is perpendicular to the purlin, leaving an extra 20 cm of roll felt on one side of the eaves, and fix it on the outermost purlin with special clamps or double-sided tape.

2. When unwinding, ensure the alignment and tension. Lay the glass wool roll felt to the other eaves. Leave 20 cm more roll felt, and fix it on the outermost purlin with special clamps or double-sided tape.

3. The two rolls of cotton are connected by a stapler binding method on the veneer flash.

4. Install the roof color steel plate, remove the special fixture at the eaves, and use the reserved 20 cm veneer to close the glass wool.

5. Pay attention to the tension and alignment of the glass wool roll felt, and the seams between rolls are tight. When overlap is required in the longitudinal direction, the overlap joints should be installed at the row of purlins.

6. According to the needs of the project, in order to avoid the occurrence of cold bridges, you can consider padding some hard insulation materials on the purlins.

Wall construction

1. The veneer faces the indoor side, unwind from the eaves to the foot of the wall, and fix the glass wool to the bottom purlin with double-sided tape, leaving 20 cm more.

2. Cut the glass wool roll felt 20 cm above the top of the wall and fix it with double-sided tape.

3. Close the glass wool and install the color steel plate on the wall.

4. The two rolls of cotton are connected by a stapler binding method on the veneer flash.

5. Pay attention to keeping the glass wool rolls tight, aligned, vertical, and the seams between rolls tight.

These are the advantages of Glass Wool and the considerations for glass wool construction.

Want more information on building glass wool batts price? Feel free to contact us.