US20060013985A1

US20060013985A1 - Frangible fiberglass insulation batts

Info

Publication number: US20060013985A1
Application number: US11/228,237
Authority: US
Inventors: Ronald Houpt; Carl Kissell; Cameron Wright; Jon Pereira
Original assignee: Knauf Insulation GmbH USA
Current assignee: Knauf Insulation GmbH USA
Priority date: 2003-09-25
Filing date: 2005-09-19
Publication date: 2006-01-19
Also published as: US20050067092A1; US6960276B2

Abstract

A frangible fiberglass insulation batt includes a pair of fiberglass strips arranged to lie in side-by-side relation to one another and a frangible adhesive bridge spanning a gap between the fiberglass strips and retaining the fiberglass strips in side-by-side relation. To produce such a batt, a fiberglass insulation blanket is cut along its length to form two side-by-side fiberglass strips and then an adhesive material is applied to form a frangible adhesive bridge between the strips.

Description

BACKGROUND AND SUMMARY

The present disclosure relates to apparatus and methods for producing fiberglass insulation batts, and in particular, batts of fiberglass insulation suitable for use in building construction. More particularly, the present disclosure relates to fiberglass insulation batts that are configured to be converted into separate fiberglass insulation strips of various predetermined widths in the field without the use of cutting tools.
Fiberglass insulation is made of glass fibers held together by a binder. Glass fibers are produced by melting sand or recycled glass products and spinning those materials to produce tiny strands of fiberglass. Glass fibers will not stick together unless they are glued or bound together. A binder is an adhesive material that holds fibers together, allowing them to keep their shape or overall form. Fiberglass insulation is made, for example, by spraying a binder on the glass fibers. After being cured in an oven, the binder holds the fibers together.
A batt is a blanket of fiberglass insulation used to insulate residential and commercial buildings. Some batts include a paper or foil facing material affixed to the fiberglass insulation, and other batts do not include any facing material.
According to the present disclosure, a frangible fiberglass insulation batt includes a pair of fiberglass strips arranged to lie in side-by-side relation to one another and a frangible adhesive bridge spanning a gap between the fiberglass strips and retaining the fiberglass strips in side-by-side relation. In the field at a construction site, a worker can separate one of the fiberglass strips from the other of the strips by pulling one strip laterally away from the other strip using a “peeling away” action owing to relatively weak internal bonds in the frangible adhesive bridge. No tools are needed to accomplish such separation of the two fiberglass strips.
A method of producing such a frangible fiberglass insulation batt comprises the steps of passing a stream of cured fiberglass insulation through a cutter to form two side-by-side fiberglass strips and then passing the two side-by-side strips through an adhesive applicator. The adhesive applicator applies an adhesive material to one or both of the strips and the strips are mated to establish the frangible adhesive bridge between the strips. This frangible adhesive bridge spans the gap and retains the two fiberglass strips in fixed relation to one another until the frangible adhesive bridge is, for example, torn along its length or otherwise fractured by a construction worker in the field.
In an illustrative embodiment, the adhesive applicator includes a strip separator, an adhesive dispenser, and a strip joiner. The strip separator intercepts and deflects the moving fiberglass insulation after it exits the cutter to separate the two side-by-side strips along a cut line therebetween to expose opposing side edges of the strips and provide a widened gap between the strips. The adhesive dispenser is located in or near the widened gap between the strips and configured to dispense an adhesive material onto one or both of the opposing side edges of the strips. The strip joiner is configured to manipulate one or more of the strips to mate the opposing edges of the strips so that adhesive material deposited therebetween bonds with the fiberglass strips to establish the frangible adhesive bridge between the fiberglass strips. Internal bonds of the frangible adhesive bridge are relatively weak in comparison to internal bonds of the fiberglass strips and are broken easily by a worker in the field to facilitate separation of one strip from the other strip without the use of tools.
Additional features of the present disclosure will become apparent to those skilled in the art upon consideration of the following detailed description of illustrative embodiments exemplifying the best mode of carrying out the disclosure as presently perceived.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description particularly refers to the accompanying figures in which:
FIG. 1 is a diagrammatic view of a method in accordance with the present disclosure for producing a frangible fiberglass insulation batt (that can be separated by hand into strips having predetermined widths) by curing uncured fiberglass insulation in a “curing oven”, cutting that fiberglass insulation in a “cutter” to form separate yet adjacent insulation strips and a gap between the strips, applying an adhesive material to the separated strips to cause the strips to bond together to establish a frangible adhesive bridge spanning the gap between the strips, and then using either a “strip marker” or “facing apparatus” to indicate the location of the frangible adhesive bridges in the fiberglass insulation;
FIG. 2 is a perspective view of a frangible fiberglass insulation batt formed to include two frangible adhesive bridges extending along the length of the batt so that the batt can be “broken” manually along the two frangible adhesive bridges to produce three separate insulation strips without the use of cutting tools;
FIG. 2 a shows a fiberglass diagrammatic view of the three strips shown in FIG. 2 and the gaps between those three strips after separation of the strips;
FIG. 3 is a perspective view of a system for producing a fiberglass insulation batt, which system uses a conveyor to move cured fiberglass insulation so that the fiberglass insulation is intercepted by, in sequence, a cutter, a strip separator, an adhesive dispenser, and a strip joiner and showing a first embodiment (in solid) wherein the strip joiner comprises a pair of spaced-apart barriers (each barrier comprising, e.g., a rotating wheel) and a second embodiment (in phantom) wherein the strip joiner comprises a “force generator” that functions to apply a pneumatic or other force (using, e.g., compressed air) to move one or more insulation strips toward another insulation strip;
FIG. 4 is a top plan view of the system shown in FIG. 3 showing a first strip separator and first adhesive dispenser in a widened gap formed between first and second insulation strips and showing a second strip separator and second adhesive dispenser in a widened gap formed between second and third insulation strips; and
FIG. 5 is a side elevation view taken along line 5-5 of FIG. 4.

DETAILED DESCRIPTION

Apparatus and methods are disclosed herein for producing a fiberglass insulation batt that is formed to include longitudinally extending frangible planes therein to enable construction workers to convert the fiberglass insulation batt into separate fiberglass insulation strips of various predetermined widths in the field without the use of cutting tools. A “batt” is a blanket of thermal insulation usually comprising glass fibers.
Relatively weak internal bonds are established using an adhesive material during manufacture of the fiberglass insulation batt to define the longitudinally extending frangible planes using apparatus and methods described herein. These internal bonds are strong enough to hold the fiberglass insulation batt “together in one piece” during transport from inventory to a construction site and yet are weak enough to allow a construction worker to separate one longitudinally extending strip in the batt from an adjacent longitudinally extending strip in the batt manually and without the use of cutting tools.
Various methods are suggested diagrammatically in FIG. 1 for producing a frangible fiberglass insulation batt 10 shown, for example, in FIG. 2. Batt 10 is formed using apparatus and methods disclosed herein to include two longitudinally extending frangible adhesive bridges 12, 14 which are arranged to lie in spaced-apart parallel relation to one another to “partition” batt 10 into three formative longitudinally extending strips 21, 22, and 23.
In the field at a construction site, a worker can separate first strip 21 from second strip 22 along first frangible adhesive bridge 14 by pulling one strip laterally away from the other strip using a “peeling-away” or other fracturing action owing to relatively weak internal bonds established along first frangible adhesive bridge 12 between fiberglass material comprising first and second strips 21, 22. Likewise, a worker can separate third strip 23 from second strip 22 along second frangible adhesive bridge 14 by pulling one of those strips away from the other of those strips in a similar manner owing to relatively weak internal bonds established along second frangible adhesive bridge 14 between fiberglass material comprising second and third strips 22, 23. Because, in an illustrative embodiment, each frangible adhesive bridge 12, 14 contains only an insubstantial amount of glass fibers, it is readily or easily broken (i.e., frangible) in response to manual “tearing” or “peeling” forces applied by a construction worker in the field so that the worker can separate one strip from its side-by-side companion strip manually without the use of cutting tools.
During building construction activities, workers often need to create insulation strips of non-conventional width and the ability to create a variety of strip widths without using cutting tools by use of frangible fiberglass insulation batt 10 would be welcomed by many workers in the construction trade. As suggested in FIG. 2, first strip 21 has a width 31, second strip 22 has a width 32, and third strip 23 has a width 33. When bonded together during manufacture, first and second strips 21, 22 have a combined width 34, second and third strips 22, 23 have a combined width 35, and first, second, and third strips 21, 22, and 23 have a combined width 36. By selecting the location of frangible adhesive bridges 12, 14 carefully during manufacture, it is possible to create a unified but frangible fiberglass insulation batt that can be separated in the field to produce a wide variety of insulation strip widths without using cutting tools.
Using a first method illustrated diagrammatically in FIG. 1, a stream of uncured fiberglass insulation 40 is passed through a curing oven 44 to cause the binder associated with the fiberglass to polymerize during exposure to fiberglass curing heat (at a temperature of about 350° F. to 600° F.) to produce a fiberglass insulation blanket 11. Uncured fiberglass insulation 40 comprises glass fibers coated with a binder. The binder “sets” when exposed to high temperature in a curing oven 44 to bind the glass fibers together. A fiberglass insulation blanket 11 is discharged from curing oven 44 and transported along a conveyor 50 in a downstream direction 54 past, in series, a cutter 42 and an adhesive applicator 43 as suggested, for example, in FIGS. 1 and 3.
Fiberglass insulation blanket 11 is passed through a cutter 42 to cut the uncured fiberglass insulation 40 into two or more separate strips. Cutter 42 cuts all the way through uncured fiberglass insulation 40 along cut lines 53 as the insulation 40 passes through cutter 42 to provide first, second, and third strips 21, 22, and 23 separated by longitudinally extending gaps 56 and 58.
Next, an adhesive applicator 43 is used to apply an adhesive material 51 to contact the strips along a cut line 53 therebetween established by cutter 42 and to join the strips together to cause the adhesive material to establish a frangible adhesive bridge spanning a gap between the strips. To “span” gap 56 or 58 is to extend across the gap and interconnect the strips defining the gap without necessarily filling or entering the gap. Adhesive material 51 can flow into the gap continuously, periodically, or intermittently to establish a suitable frangible adhesive bridge between the strips. Before batt 10 is delivered to inventory 48, it is passed through a strip marker 46 that operates to apply one or more “indicator lines” to an exterior surface of batt 10 to mark the location of each longitudinally extending frangible adhesive bridge in batt 10.
Using a method illustrated diagrammatically in FIG. 3, cured fiberglass insulation 39 is passed through a strip press 41 to compress fiberglass insulation 39 to a compacted thickness before such fiberglass insulation 39 is passed through cutter 42. In the illustration embodiment, cutter 42 comprises a pressurized fluid source 86 for supplying high-pressure fluid through fluid transfer conduits 87 to fluid-jet nozzles 88 to generate streams of fluid that pass through fiberglass insulation 39 to create longitudinally extending gaps (or cut lines) 56, 58. Strip press 41 is positioned to lie upstream of fluid-jet nozzles 88 to compress fiberglass insulation 39 to a compacted thickness selected to facilitate “cutting” fiberglass insulation using fluid-jet nozzles 88. It is within the scope of this disclosure to use saw blades (not shown) or other knife means to cut blanket 11 to form gaps 56, 58.
Using a method illustrated diagrammatically in FIG. 1, a facing apparatus 47 is used to apply a facing material (pre-marked with indicator lines) to one surface of the cut fiberglass insulation blanket 11 to align the indicator lines with the frangible adhesive bridges formed in the fiberglass insulation blanket 11. Alternatively, adhesive material 51 could have a color different from the color of strips 21, 22, 23 to provide suitable, visible indicator lines for gaps 56, 58.
As suggested in FIG. 1, a batt cutter 45 is provided downstream of strip marker 46 or facing apparatus 47. Batt cutter 45 is configured to cut periodically the strips 21, 22, 23 and frangible adhesive bridges 12, 14 laterally to provide a series of separate elongated frangible fiberglass insulation batts (not shown) for delivery to inventory 48.
Adhesive applicator 43 comprises a strip separator 60, an adhesive dispenser 62, and a strip joiner 64 arranged in series as suggested, for example, in FIGS. 3-5. In the illustrated embodiment, adhesive dispenser 62 comprises a source of adhesive material 51 for supplying adhesive material through transfer conduits 66 to discharge nozzles 68 to generate streams of adhesive material 51 that are discharged into the gap formed between a pair of side-by-side insulation strips.
As suggested in FIGS. 3-5, fiberglass insulation blanket 11 is passed through cutter 42 to cut blanket 11 along a first cut line 53 to form two side-by-side separate strips 21, 22 separated by a gap 56 and along a second cut line 53 to form a third strip 23 separated from second strip 22 by a gap 58. As suggested in FIG. 2 a, first strip 21 includes a longitudinally extending side edge 70 that cooperates with an opposing longitudinally extending side edge 72 of second strip 22 to form gap 56 therebetween. Likewise, second strip 72 includes another longitudinally extending side edge 74 that cooperates with an opposing longitudinally extending side edge 76 of third strip 23 to form gap 58 therebetween. The width of the gaps 56, 58 shown in FIG. 2 a is exaggerated for clarity and it is within the scope of this disclosure to vary the width of gaps 56, 58 to accommodate a suitable adhesive material to be deposited therein.
Adhesive material 51 is applied to one or both of side edges 70, 72 and one or both of side edges 74, 76 by adhesive dispenser 62. In the illustrated embodiment, strip separators 60 are arranged to lie downstream of cutter 42 and configured to separate first strip 21 from second strip 22 at cut line 53 and to separate second strip 22 from third strip 23 at cut line 53 to establish widened gaps 156, 158. Each strip separator 60 is arranged to intercept blanket 11 at one of cut lines 53 and is shaped to spread the strips apart so that they move away from one another as blanket 11 moves on conveyor 50 in downstream direction 54. Although strip separator 60 is shoe-shaped in the illustrated embodiment, a rod or other deflector having a lateral dimension wider than gaps 56, 58 could be used to separate adjacent insulation strips.
In the illustrated embodiment, adhesive material 51 is dispensed into widened gaps 156, 158 to contact at least one of side edges 70, 72 and at least one of side edges 74, 76. As suggested in FIGS. 4 and 5, discharge nozzle 68 is located in widened gap 156 and operated to discharge adhesive material 51 onto at least one of side edge 70 of first strip 21 and side edge 72 of second strip 22. The other discharge nozzle 68 is located in widened gap 158. It is within the scope of this disclosure to locate the discharge nozzles 68 near to the widened gaps 156, 158 so that adhesive material 51 can be discharged to contact the strips in a desired manner.
In a first embodiment, strip joiner 64 includes two barriers 80 that are spaced apart from one another to define a channel 15 therebetween as suggested in FIGS. 3 and 4. A downstream portion 13 of fiberglass insulation blanket 11 (having a width that is wider than the width of channel 15) is transported on conveyor 52 through the channel to compress blanket 11 to cause (1) first and second strips 21, 22 to move toward one another to trap adhesive material 51 introduced into widened gap 156 to establish frangible adhesive bridge 12 and (2) second and third strips 22, 23 to move toward one another to trap adhesive material 51 introduced into widened gap 158 to establish frangible adhesive bridge 14.
In one embodiment, each barrier 80 includes an upright axle 82 and an edge roller 84 mounted for rotation on upright axle 82 to engage an exterior edge 86 or 90 of fiberglass insulation blanket 11 as blanket 11 moves along conveyor 50. Illustratively, barriers 80 are anchored in a fixed position relative to one another and to moving blanket 11 to cause the distance 88 between barriers 80 to be fixed and less than the width of the portion of blanket 11 entering channel 15 defined by barriers 80.
In another embodiment, strip joiner 64 is provided by force generators 91, 92 as suggested in FIGS. 3 and 4. It is within the scope of this disclosure to use a first force generator 91 to discharge a first stream (continuous or pulsed flow) of pressurized gas (e.g. air) to impact first exterior edge 86 of fiberglass insulation blanket 11 and to use a second force generator 92 to discharge a second stream of pressurized gas to impact a second exterior edge 90 of fiberglass insulation blanket 11. It is within the scope of this disclosure to use one force generator to produce both of the first and second streams of pressurized gas. The forces applied to first exterior edge 86 and to second exterior edge 90 cooperate to compress blanket 11 laterally to mate strips 21, 22, and 23 to trap the adhesive material 51 deposited there between to form frangible adhesive bridges 56, 58.

Claims

1-24. (canceled)

25. A frangible fiberglass insulation batt comprising

a pair of fiberglass insulation strips arranged to lie in side-by-side relation to one another and

a frangible adhesive bridge spanning a gap located between the pair of fiberglass insulation strips to produce a frangible bond retaining the fiberglass insulation strips in side-by-side relation.

26. The frangible fiberglass insulation batt of claim 25 comprising

glass fibers bonded together to form a first bond, and

wherein the frangible bond is a second bond different from the first bond.

27. The frangible fiberglass insulation batt of claim 26 wherein the second bond is formed after the first bond.

28. The frangible fiberglass insulation batt of claim 25 wherein the frangible adhesive bond is relatively weak in comparison to the first bond.

29. A frangible fiberglass insulation batt comprising

at least two previously-separated and reattached fiberglass insulation strips arranged to lie in side-by-side relation to another, and

a frangible adhesive bridge spanning a gap between the previously-separated and reattached fiberglass insulation strips to produce a frangible bond.