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Патент USA US2108682

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Fe“ 15;, W38.
I
F. R. LESLIE
=
2,108,682
INSULATING MATERIAL
Filed Dec. 4, 1936
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2 Sheets-Sheet 1
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'INVENTOR.
Ewnh/ R. Z eslie
A TTORNEYS‘
Feb. 15, 1938.
F_ R, LESLIE
2,108,682
INSULATING MATERIAL
Filed Dec. 4, 1956’
2 Sheets-Sheet 2
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Patented Feb. 15, 1938
2,108,682
arcacaa
saccharine Maura-‘wrap
I
ii‘ranh R. mite, St. Pauli, "Minna
Application December a, rear,
titties
i3 @“aaiidith - (6i.
The present invention relates to an insuiating
eiement, and more particuiarly to an insulating
insulating material wiii not readily be dissipated
formed supporting framework, such as the walls
below its dew point. its the temperature within
the enclosed wall space continues to fall the mois~
ture therein will precipitate out in the form of
droplets, which collect on the fibers of the insu“
as is
case in the open air, with the come
element which is adapted to be ?tted into a pre» cue-nee that the air in the enclosure soon falis
ii of a building or refrigerator structure. '
Various types of fibrous substances have been
employed for insulating purposes in such struc
tures, but where a fibrous insulating substance is
lating material. As the temperature passes be
low freezing, these droplets freeze and form ice
and frost particles. This action is extremely pro
condensation upon the fibers'wit'hin the struc nounced in a building having humidifying equip~=
ture, the insulating properties' of'the substance ment.- That this action takes place has been ac
are materially lessened.
‘
tually demonstrated by opening walls in which
It has been found by experiment, and by the
> various types of ?brous insulating‘ materials have
15 tual opening of old walls wherein such substances been mounted. Repetition of this process finally
have been employed, that the alternate wetting causes the insulation to become soggy, with a con
and drying out of such material within the walls sequent loss of insulative properties, and where
used which is capableof absorbing water'-either
to directly by the fibers of the material itself, or by
causes it to sag and drop.
Although originally
the insulating substance may have been applied
20 to the full height of the walls, when subjected to
this action for a few years, the substance has
been found to have settled or dropped a material
distance from the top of the framed opening in
which it was originally mounted. Sometimes the
sagging has been so pronounced as to leave a
the insulation is mounted in a vertical position, ,
as in the walls of a building, the additional weight
of the water in the mass causes the insulation to
settle in its chamber, leaving the top part of‘ the
chamber completely without insulation.
An object of the present invention is to make
an improved heat insulating element.
‘
Another object of the invention is to coat an
materially large, entirely uninsulated space at 'element of vapor permeable insulating material
with a solution of fiexible, vapor proof substance,
which the substance was originally mounted.
such solution having a viscosity sumciently high
Various expedients have been employed to cov
to prevent deep absorption of the solution by said
the upper end of each of the framed openings in
30 er batts or blocks of such insulating material,
such as by enfolding them in water proofed paper
envelopes, but such expedients are not only quite
expensive, but are not entirely satisfactory for
general use, since it has been difficult to complete
35 1y seal' such envelopes, particularly the ends
thereof, and the individually wrapped units them;
element and of thereafter evaporating the sol
vent in which said substance is dissolved to pro-»
vide a water proof coating over the element to
which said solution has been applied.
_
In order to attain these objects there is pro
vided in accordance with one feature of the in
vention, an insulating element such as a pad or
selves have a tendency to sag and pack in the , batt of vapor permeable insulating material hav
walls.
ing either mineral or organic ?brous structure, an
vThe condensation referred to above is particu
outer surface of said element being coated with a
larly prevalent in cold climates where the neces-. ‘ viscous rubber or similar solution having a vapor .40
sity for effective insulation is greatest. This izing solvent, the viscosity of the solution being
_ condensation is largely caused in cold weather by su?lciently high to prevent penetration of the
variations in temperature and humidity in ‘the solution beyond the outer surface portion of said
walls which can best be illustrated by a specific
element. After the element has been coated with
dd example. Let us assume that during a warm
period of weather the temperature outdoors is 38°
lit, dew point 36° F., and that the following day
this solution the solvent is evaporated to leave a
tough, resilient coat completely sealing the por
tion of the element to which it has been applied
the temperature drops down to 10° F., dew point
and having adhesive engagement with the outer
6° F.
surface of the element.
These. and other features of the invention will
be more fully set forth in the following descrip
tion and the accompanying drawings, wherein:
Figure l is
in perspective of a frag
ment of insulating material embodying the pres
ent invention, a portion of the outer coating be
During the ?rst day water vapor, which is
50 a gas, will enter the wall space in which the in
sulation is mounted, providing this wall space is
not hermetically sealed,‘ and will permeate the
cells of the insulating material. If the fall in
temperature is somewhat rapid, the water vapor
in the enclosed wall space and in the cells of the
2,108,689,
2
sheet 8 thereby forming a ?ange. The two
ing peeled back to show the construction thereof, ‘the
Figure 2 is a view, also in perspective, 0! a sheets are glued together throughout the length
portion of a wall frame having an insulating ele
ment embodying the present inventlonembodied
therein,
of the ?ange to securely bind the walls of the
envelope together, a water proof adhesive being
preferably used to seal this joint against the Gil
Figure 3 is a view in isometric projection show
ing a modified construction,
Figure 4 is a sectional view ‘as on the line 63-4
oi’ Figure 3, and,
Figure 5 is a sectional view as on the line 5-5
10
of Figure 3.
Referring to the drawings in detail, a portion
of insulating material l of water permeable ma
terlal such as ?brous batt', whichls normally
subject to the objections above set forth, has,
the entire outer surface coated with a solutlon
of rubber- or other ?exible water proof material
dissolved in a solvent which is capable of being
evaporated to leave the material covering the
batt or block in the form oil a water proof coat
lhg 5, adheslvely secured to the outer surface of
the insulating element.
This solution should be of a viscosity su?lcient
ly heavy so that the solution will not permeate
26 materially into the insulating element, since such
permeation would reduce the insulating qualities
of the element to the depth of penetration of
the solution and would also increase the weight
and cost of the product. This material can be
30 applied to the block either by spraying, brushing,
dipping, or otherwise, as desired, the method of
application being no part of the present inven
tion. Inasmuch as there are a large number of
such solutions which are well known to the art
85 of coating materials, any of which would be suit
able for use in the present invention’, it is not
considered necessary to specify any speci?c coat
ing substance in detail. One'suitable substance
for the purpose is a thick viscous rubber solution
40 having a vaporizing solvent. After the applica
tion of the solution to the insulating element the
solvent is evaporated in any suitable manner such
as air drying.
.
The method of using coated insulating ele
45 ments embodying the present invention is similar
to the use of the present well known methods
of use of untreated batts or strips. The ele
ments may be simply inserted between the stud
dings or other frame members as shown in Fig
ure
2,- the elements being of a size to fit snugly
50
between the frame members to reduce air leakage
around the elements and by frictional engage
ment between the rubber coating of‘ the ele
ments and the frame members to support the
55 elements in position. The resilient-nature of
the cover tends to hold the element in its original
form and the adhesion between the cover and
the ?ller supports the ?ller in position through
out the entire height 0! the unit. When used
60 for other purposes the elements may be mounted
entrance of moisture. The ends of the insulating
material thus formed are then poated with a
rubber'or other suitable insulation as at ll, as
previously described for the structure shown in
Figures 1 and 2, the coating being applied to each
end of the unit and extending to-the walls of
the envelope and over the ends of the ?anges so
as to completely seal the ends of the insulating
structure and adhereto the envelope walls. The
viscous material in its solvent state will slightly 15
permeate the ?brous ?ller material 6 so that the
?bers on the ends thereof will be mrmanently
bound to the sealing coating ll over the ends
of the tiller material 6 and will also have a tight
adhesive seal to the envelope walls 1 and 8 there 20
by not only elfectively sealing the ends of the
envelope against the entrance of water vapor,
but also providing a positive support for the in
sulative filler 6 to prevent the filler from sag
ging'dow'n in the envelope under its own weight.
It has been noted that this general type of in
sulation when mounted in a wall space has a sort
of draft e?ect due to the fact that the air con
tsined within the cells or spaces between the
?bers of the ?ller is somewhat warmer than that 30
in the air space between the outer face of the
material and the sheathing or all in which it is
mounted so that the warmer ai
within the en
velope will tend to rise and the colder outer air in
the space beyond will tend to fall thereby pro
muting a circulation of air with its contained wa
ter vapor throughout the material in its con
tainlng envelope.
The sealing of the ends of thefenvelope in ac
cordance with the present invention e?iectlvely 40
prevents such action as, of course, does the com
plete‘enclosing o! the element as shown in Fig
ures 1 and 2.
The embodiment illustrated in Figures 1 and 2
is somewhat more expensive to make than that 45
illustrated in Figures 3 to 5 inclusive but each
of the embodiments comprises an insulating ele
ment which overcomes one oi! the principal faults
of an otherwise excellent type of insulating ma
terial and has a distinct ?eld in the art oi‘ in 50
sulation.
I claim:
1. An insulating unit comprising a ?exible, va
por permeable, ?brous core, a tubular, ?exible,
vapor proof envelope enclosing said core and 55
leaving end portions thereof exposed, the end
portions of the envelope and the core being co
planar and a coating of viscous vapor proof
sealing, material over the exposed portions oi’
the core in embedding engagement therewith, 60
in preformed framed chambers adapted to re
said coating extending to the end portions of
.the envelope in sealing engagement therewith
ceive them.
whereby said core is‘ positively supported with re
‘
The structure shown in Figure 2 comprises a
sill 3,,studding members 4 and, 5, with the ele
65 ment I enclosed in its water proof sheathing 2
mounted between the studdings in a customary
manner.
,
Referring now to the modi?ed structure shown
in Figures 3 and 4. Fibrous insulating mate
70 rial 6 is enclosed in a paper envelope compris
ing side walls ‘I and 8. The sheet from which
the envelope wall a is made is narrower than that
7 from which the wall 1 is made. The edges of the
wall 1 are folded forwardly as at 9 and then
outwardly as at I0 to engage the outer edge of
spect to said envelope.
2. An insulating unit comprising a ?exible, va
por permeable, ?brous core, a tubular, ?exible,
vapor proof envelope enclosing said core and
leaving end portions thereof exposed, and a‘coat
log of viscous vapor proof sealing material over
the exposed portions of the core in embedding
engagement therewith, said coating extending to
the end portions of the envelope in sealing en
gagement' therewith whereby said core is 'posi
tively supported with respect to said envelope.
I
FRANK It. LESLIE.
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