Glass fiber insulation

Economic Aspects and Uses. The principal producers in the United States are U.S. Borax and Chemical Corp., North American Chemicals Co., and American Borate Corp. Their combined aimual capacity in 1989 was reported to be 735,000 metric tons of equivalent boron oxide [1303-86-2], B2O2 (20). Of this toimage, 50% is exported. About 30% of boron compounds are used in glass fiber insulation. Another 30% is used in other type fibers and borosihcate glasses. Boron is also used in soaps and detergents, fire retardants, and agriculture (see Boron compounds). 

Weather boarding on timber framing with 10 mm 0.62 plasterboard lining, 50 mm glass-fiber insulation in the cavity and building paper behind the boarding... 

The insulation was 3.5-in.- (90-mm-) thick, unfaced, glass-fiber insulation (friction-fit). Walls with insulation also had a 4-mil clear polyethylene vapor barrier on their interior side. All wood and gypsum materials were conditioned at 23°C and 50 percent relative humidity, resulting in moisture content of 9 to 10 percent in wood materials. Figure 1 is a diagram of the wall frame construction. The hardboard siding was on the exterior side of the 5/8-in. (16-mm) plywood (not shown). 

Glass fiber insulation (30%) is the primary use of borates. Other uses include textile glass fiber (18%), soaps, detergents, and bleaches (10%), glass (10%), agriculture (7%), and flame retardants (6%). 

Hyporka. A glass fiber insulation used in rockets Ref A.J. Zachringer, Solid Propellant Rockets, Wyandotte, Mich (1955), p 152... 

TABLE 3.1 Reduction in AITs Caused by Liquids Soaking in Glass Fiber Insulation... 

Construction materials such as cement, concrete, aggregate, mineral and glass fiber insulation, and gypsum wallboard. 

Determine the overall unit thermal resistance (the ff-value) and the overall heat transfer coefficient (the /-factor) of a wood frame wall that is built around 38 mm X 90-mm (2X4 nominal) wood studs with a center-to-center distance of 400 mm. The 90-mri-wide cavity betv een the studs is filled with glass fiber insulation. The inside is finished with 13-mm gypsum wallboard and the outside with 13 mm wood fiberboard and 13-mm x 200-mm wood bevel lapped siding, rtie insulated cavity constitutes 75 percent of the heat transmission area while the studs, plates, and sills constitute 21 percent. The headers constitute 4 percent of the area, and they can he treated as studs. 

Wood fiberboard sheeting, 13 mm Glass fiber insulation, 90 mm 4b. Wood stud,... 

In the United States, the /f-values of insulation are expressed widiout any units, such as /f-19 and R- iO. These R-values are obtained by dividing the thickness of the material in feet by its thermal conductivity in the unit Btu/li ft F so that the/f-values actually have the unit h fi F/Btu. For example, the /f-value of 6-in-thick glass-fiber insulation whose thermal conductivity is 0.025 Btu/h ft F is (Fig. 7-37)... 

Thus, this 6-in-thick glass fiber insulation would be referred to as R-20 insulation by the builders. The unit of R-value is °CAV in SI units, with the conversion relation I °CAV = 5.678 h ft F/Btu. Therefore, a small / -value in SI corresponds to a large TJ-value in Engli.sh units. 

Plywood adhesives, glass-fiber insulation, molding compound, e.g., Hitanol, Sirfen, Trolitan. 

The Performance of Glass Fiber Insulation under High Vacuum (4) 141... 

Mechanical Properties of Insulating Plastic Foams at Low Temperatures (4) 132 The Performance of Glass Fiber Insulation under High Vacuum (4) 141 A Vacuum Insulated Transfer Line for Liquefied Gases (4) 326 Economic and Design Considerations for a 650 Foot High Vacuum Insulated Transfer Line (4) 335... 

In practice, the insulation of the hot Cross-Feed/SCP Duct was imperfect in service the glass fiber insulation got squashed causing the stainless steel sheath to get hot. Bellows units at bends in the duct were, in any case, less well insulated, or even... 

THE PERFORMANCE OF GLASS FIBER INSULATION UNDER HIGH VACUUM... 

In lieu of mentioning manufacturers trade names, the glass fiber insulations were classed simply as Type "A" and Type... 

Construction Gypsum board joint cement Concrete Paper and film lamination Vinyl flooring Wood doors Glass fiber insulation Bonding facing to fibers... 

R. M. Christiansen and M. Hollingsworth, Jr., "The performance of glass fiber insulation under high vacuum," 1958 Cryogenic Engineering Conference Proceedings. 

Laboratory tests and actual fires show that Dowtherm A (a heat-transfer fluid consisting of a eutectic mixture of biphenyl oxide and biphenol) can be ignited if it is soaked in glass fiber insulation and in contact with air at temperatures considerably below the normal AIT. This is also true for stearic acid soaked in glass fiber insulation. Table 5.1 shows the reduction in AIT of Dowtherm A and of steric acid soaked in glass fiber insulation. 

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