Other

Owens-corning Fiberglas Corporation

Leonard D Rood

Ronald E Kissell

A liquid which has a negative static electrical charge is pre-coated onto a paper or fabric towel and the coated, negative static electrically charged paper or fabric towel is rubbed onto positive, static electrically charged glass windows, automobile and truck windshields, and glass mirrors in sufficient quantity to cause the surfaces to become negatively charged. Since like static electrical charges will repel each other, the negative static electrically charged liquid will repel negative static electrically charged human fibers, dust and other negatively charged fibers. If the film is not thin, the coating will be streaked. The coating is water insoluble and preferably is a water insoluble silicone oil, preferably in an amount of at least 70% silicone and most preferably comprises liquid polydimethylsiloxane. The coating can be mixed with a water insoluble, silicone soluble, liquid comprising the remaining 30% or less. The resulting composition should have a viscosity substantially in the range of 5 to 50 centistokes.

Negative static electrically charged coating method and composition for repelling dust from glass

A method for manufacturing a tire retardant cellulose insulation with reduced density and reduced settling. The method consists of adding a material, the fibers of which have a positive electrostatic charge, onto a shredded newspaper base either before or after the addition of a pre-coat, consisting of a mixture of limestone and an antistat. A fire retardant agent is then added and the materials are ground in a finish mill. The newspaper fibers become positioned at an angle to the paper pieces, increasing the distance between the paper pieces, thereby lowering the density of the cellulose. Fibers such as ground cardboard, wood mulch, sawdust, and fiberglass fibers are examples of materials with electrostatically positively charged fibers.

Treatment for improving cellulose insulation

An improved fire retardant cellulose insulation with reduced density and reduced settling. A method consists of adding a material, the fibers of which have a positive electrostatic charge, is added onto a shredded newspaper base either before or after the addition of a pre-coat, consisting of a mixture of an inorganic, non-hygroscopic powder and an antistat. A fire retardant agent is then added and the materials are ground in a finish mill. The newspaper fibers become positioned at an angle to the paper pieces, increasing the distance between the paper pieces, thereby lowering the density of the cellulose. Increasing the amount of antistat will decrease settling at the expense of increasing density. Adding water to the insulation system will neutralize static electricity and minimize settling. Fibers such as ground cardboard, wood mulch, sawdust, and fiberglass fibers are examples of materials with electrostatically positively charged fibers.

A method for manufacturing fire retardant cellulose fibers. The method comprises mixing limestone with shredded cellulosic fibers, mixing an acidic agent with the fibers, and depositing water on the mixture of fibers, limestone and acidic agent. A chemical reaction results from the limestone and the acidic agent being combined in a sufficiently moist environment. The reaction liberates carbon dioxide gas which causes a mechanical foaming action, thereby breaking down and distributing the produced particles of the chemical reaction. The preferred acidic agent is ammonium sulfate combined with boric acid. The method preferably includes the application of an anti-static agent in the step that includes mixing the limestone with the fibers. The water deposited preferably comprises an amount substantially in a range from 6%-16% of the weight of the fibers.

Treatment for improving cellulosic insulation

The coating of shredded paper insulation with a powdered or particulate fire retardant agent mixed with an anti-static agent to enhance coating is further improved by applying a precoat of a mixture of fire retardant agent and anti-static agent, the precoat mixture containing only a relatively minor portion of the final fire retardant coating, and subsequently coating the paper particles with the remaining fire retardant agent.

Precoat treatment for improving cellulosic insulation

In connection with the manufacture of cellulosic insulation of the type utilizing shredded newspaper which is treated with a fire retardant chemical composition and used for the thermal insulation of building structures, an anti-static agent is mixed and adhered to the fire retardant agent prior to depositing the fire retardant agent on the shredded cellulosic material. The anti-static agent may also be introduced into the finished product with desirable but not as significant improvements in the insulation and its manufacture.

A flame retardant thermal insulation material comprising a dry, shredded cellulosic material, such as newsprint, which is coated with a dry phosphorous-containing, flame retardant composition. The composition is one which is capable of decomposing near the ignition temperature of the shredded paper, which is between 120 degrees and Celsius and 250 degrees Celsius and preferably includes a plurality of compounds which decompose at different temperatures spaced within this range to provide the stagewise release of combustion inhibiting agents. The composition can be a single compound such as calcium phosphate but preferably is a combination of similar compounds such as (NH.sub.4).sub.2 HPO.sub.4, CaH.sub.4 (PO.sub.4).sub.2, CaHPO.sub.4 and triple super phosphate. Further, the phosphorous composition is preferably combined with urea. Elemental sulfur powder may be included with any of the previous compositions as a smoke retardant. The paper and flame retardant composition are maintained in the dry solid state during processing, application and use. The insulation is manufactured by shredding the paper and thoroughly mixing it with the finely ground, powdered flame retardant composition to intimately coat the paper with the flame retardant powder. The shredded, coated paper may be bagged for later use as poured or blown in insulation or it may be filled into elongated plastic envelopes to form insulative batting. Air may be evacuated from the bags or envelopes.

Fire retardant insulation

Urethane plastic foam reinforced with glass fibers is provided, the glass fibers being combined with the plastic foam material prior to foaming. The foaming of the plastic material is physically controlled and restrained to achieve particular desired physical characteristics of the final product. By restricting the extent of foaming, and by using particular layers of fibers, high fiber concentration and more dense skin areas can be obtained in the foam; the fibers can also be initially distributed in a manner to increase their concentration near the surfaces of the foam body. Apparatus is provided for producing reinforced foam in a continuous manner and a method is also provided for combining the fiber reinforcement and the foamable plastic material in a manner such that the plastic material is disposed between two layers of the fiber reinforcement to assure proper distribution of the fibers in the foam. In a preferred form, the fibers are initially disposed in the foamable material in a manner to lie generally perpendicular to the primary direction of growth or rise of the foamable material so that the fibers are also generally perpendicular to the resulting elongate cells. The fibers also preferably are of particular lengths and diameters and present in optimum concentrations to achieve maximum reinforcement and strength in the final product.

Growing community of inventors

Columbus, OH, United States of America

Leonard D Rood