Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Release layer
Reexamination Certificate
1998-10-23
2001-03-27
Copnenheaver, Blaine (Department: 1771)
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
Release layer
C156S062600, C156S247000, C156S307100, C156S307300, C156S309900, C442S394000, C442S412000
Reexamination Certificate
active
06207245
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates generally to a fiberglass blanket having an adhesively attached release liner assembly and method for making the same. An important aspect of this invention is the replacement of a carrier sheet in the release liner assembly for carrying adhesive coatings on opposite surfaces thereof for joinder with a release liner and with surface fibers of the fiberglass blanket. Another important aspect of this invention is the application to either the surface fibers of the fiberglass blanket or to a surface of the carrier sheet of an adhesive coating in an uncured liquid state and the subsequent joinder of the blanket to the carrier sheet while the adhesive coating is in the liquid state such that surface fibers of the blanket are thoroughly coated with the adhesive.
It has long been known in the prior art to adhesively join a fiberglass insulation blanket directly to a sheet of silicone coated release paper. A difficulty encountered with this prior art process and the resulting prior art product is that when the release liner is peeled away from the surface of the blanket at the time it is being placed in service as a thermal or acoustical insulator, surface fibers are often torn away from the blanket as well. Another difficulty encountered has to do with adhesively joining the blanket to the release liner when the adhesive is in a semi-liquidous, plastic-like state because the adhesive does not thoroughly coat surface fibers of the blanket, whereby the tensil strength or “peel” strength of the resulting assembly can be less than a desirable or even suitable level.
By means of our invention, these and other disadvantages encountered using prior art fiberglass blankets with adhesively joined release liners are substantially overcome.
SUMMARY OF THE INVENTION
It is an object of our invention to provide a novel batt of acoustical/thermal insulation including a fiberglass blanket and an adhesively joined release liner assembly.
It is a further object of our invention to provide a novel method for making a batt of insulation.
It is yet another object of our invention to provide a batt of insulation including a fiberglass blanket and a release liner assembly wherein the assembly includes a carrier sheet for supporting a layer of adhesive used to join the blanket to the assembly.
It is also an object of our invention to provide a batt of insulation including a fiberlass blanket and a release liner assembly wherein the former is adhesively joined to the latter by an adhesive coating while the coating is in a heated, uncured liquid state.
Briefly, in accordance with our invention there is provided an improved acoustical and thermal insulation laminate of the type which conventionally includes a fiberglass blanket and a release liner sheet. The improvement comprises a carrier sheet for carrying adhesive coatings on opposite broad surfaces thereof. A first of the coatings is sandwiched between the carrier sheet and the fiberglass blanket and a second of the coatings is sandwiched between the carrier sheet and the release liner sheet.
An additional feature of our invention is application of at least one of the adhesive coatings to either the carrier sheet or the fiberglass blanket while in a heated, uncured liquid state followed by adhesively joining the carrier sheet to the fiberglass blanket while the adhesive coating therebetween is still in a liquid state such that surface fibers of the blanket can be thoroughly coated with the adhesive.
These and other objects, features and advantages of the present invention will become apparent to those skilled in the art from the following detailed description and attached drawings upon which, by way of example, only certain preferred and other important embodiments of our invention are described and illustrated.
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DeMoss Jeffrey L.
Miller T. Scott
Copnenheaver Blaine
Miller, Jr. Maurice L.
Scott Industries, Inc.
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