摘要:
High-strength built-up roofing (BUR) membranes and systems are provided herein. These BUR products are made using improved glass fiber mat structures having unusual tear resistance in place of organic felts.The glass fiber mats are constructed from two fibrous components, namely, individual filaments, which provide the uniform denseness required for impregnation of saturant asphalt in the interstices of the mat, and extended fiber elements formed by longitudinal extension and connection of fibers from bundles of glass fibers in a wet-laid process, which furnish tear resistance and tensile strength to the BUR membranes and systems.The BUR membranes and systems of this invention have exceedingly high strengths compared with commercially available products of similar construction, and, advantageously, they can be manufactured by a very economical process.
摘要:
The glass mat made herein is comprised of two fibrous components, namely, individual filament glass fibers and extended glass fiber elements. These components are formed herein in situ in a wet-laid process from original bundles of glass fibers. The individual filaments appear by conventional filamentation of the bundles. The extended fiber elements, however, are formed by longitudinal extension of a given bundle whose fibers are connected longitudinally. Thereby the effective length of a fiber element is very much greater than the length of the fibers therein. The fiber elements are further characterized by a non-uniform diameter, as contrasted to the fibers themselves, being thicker in the midsection of the element where connection of fibers is maximized, and tapered towards its ends, where fiber connection is at a minimum.The extended fiber elements preferably predominate by weight of the fibrous content of the mat over the individual filaments. The desired ratio of the two components is achieved in the method of the invention by using bundles whose fibers have a long length, and by very gentle agitation of the dispersion slurry for a short period of time.
摘要:
What is provided herein is a glass fiber mat having a novel structure and high-strength properties which is particularly useful for roofing products, including built up roofing membranes and systems.The glass mat of the invention is comprised of two fibrous components, namely, individual filament glass fibers and extended glass fiber elements, which are formed in situ in a wet-laid process from original bundles of glass fibers. The individual filaments appear by conventional filamentation of the bundles. The extended fiber elements, however, are formed by longitudinal extension of a given bundle whose fibers are connected longitudinally. Thereby the effective length of a fiber element is very much greater than the length of the fibers therein. The fiber elements are further characterized by a non-uniform diameter, as contrasted to the fibers themselves, being thicker in the mid-section of the element where connection of fibers is maximized, and tapered towards its ends, where fiber connection is at a minimum.The extended fiber elements preferably predominate by weight of the fibrous content of the mat over the individual filaments. The desired ratio of the two components is achieved by using bundles whose fibers have a long length, and by very gentle agitation of the dispersion slurry for a short period of time.
摘要:
This invention relates to a composite shingle which includes (a) a rectangular shingle sheet having an undivided headlap portion and a lower butt portion which is divided into spaced apart tabs and (b) an elongated backup strip of hue or color contrasting with said shingle sheet, positioned under the tabs of said butt portion and secured to the lower portion of the headlap, the bottom edge of said strip conforming in outline to the bottom edge of said tabs and extending below said tabs at a distance equal to the spaces between the tabs, so as to form a uniform border around tabs.
摘要:
The variegated shingle comprises a shingle layer having front and rear surfaces the front surface including a butt portion and a headlap portion. The shingle layer contains granules on the front surface forming a plurality of horizontal striations providing gradations having color values ranging from light to dark extending between a leading edge of the butt portion and an upper portion thereof. The striations include an upper striation along the upper portion, a lower striation closer to the leading edge, and an intermediate striation between the upper and lower striations. The upper striation is darker in color value than the lower striation, whereas the intermediate striation is no darker in color value than the upper striation and no lighter in color value than the lower striation. The color values of at least one of the upper, lower, and intermediate striations vary across the granule layer.
摘要:
A rectangular shingle sheet having a butt portion which is longitudinally divided into spaced apart tab segments and an undivided headlap portion which is 1.3 to 1.5 times higher than the outward extensions of said tab segments in the butt portion; the butt portion and headlap portion carrying an asphaltic backing of varying thickness wherein the upper area of the headlap portion which is of a height approximately equal to that of the butt portion is coated with an asphaltic backing of between about 5 and about 15 mils thickness and the remaining lower area of the headlap portion and the entire butt portion is uniformly coated with an asphaltic backing of between about 20 and about 100 mils thickness. In one embodiment, the shingle is a composite roofing shingle comprising a shingle sheet having a butt portion which is longitudinally divided into spaced apart tab segments, and a separate elongated strip underlying the tab segments which fills the space between the tabs.A process for the manufacture of the shingles of this invention. comprises undercoating the butt portion and from about 1/7th to about 3/7ths of the adjoining headlap portion with an asphaltic material in a thickness of from about 20 to about 100 mils, undercoating the remaining headlap portion with asphaltic material in a thickness of from about 5 to about 15 mils and contacting said thicker undercoating with a bar which hydroplanes on the surface of the thicker undercoating to smooth the surface thereof.
摘要:
Sheet type felt material comprising 5-20 wt % glass fibers, 40-80 wt % cellulose fibers, 5-25 % binder and 3-20 wt % asphalt. The felt is made on conventional felt making equipment and may be used as siding or roofing underlayment or as facer for foam insulating boards.