U.S. patent number 3,930,090 [Application Number 05/484,192] was granted by the patent office on 1975-12-30 for non-slip waistband product.
This patent grant is currently assigned to Johnson & Johnson. Invention is credited to Roger G. Campbell, Sr., Richard E. Goff, Jr., Thomas L. Staffier.
United States Patent |
3,930,090 |
Campbell, Sr. , et
al. |
December 30, 1975 |
Non-slip waistband product
Abstract
A new and improved waistband product having one face comprising
a permeable fabric having a pattern of a specific silicone rubber
elastomeric material on its surface. The waistband product is made
by applying to a surface of a permeable fabric a silicone rubber
elastomeric compound in a pattern, allowing the compound to seep
into the permeable areas of the fabric, curing the compound and
allowing the fabric and compound to age to drive off any irritating
or toxic volatile materials.
Inventors: |
Campbell, Sr.; Roger G.
(Barrington, RI), Goff, Jr.; Richard E. (Barrington, RI),
Staffier; Thomas L. (Pawtucket, RI) |
Assignee: |
Johnson & Johnson (New
Brunsiwck, NJ)
|
Family
ID: |
26976783 |
Appl.
No.: |
05/484,192 |
Filed: |
June 28, 1974 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
309382 |
Nov 24, 1972 |
3854978 |
Dec 17, 1974 |
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Current U.S.
Class: |
428/196; 2/76;
2/221; 2/237; 428/447 |
Current CPC
Class: |
A41F
9/00 (20130101); D06N 7/0092 (20130101); D06N
2209/106 (20130101); Y10T 428/2481 (20150115); D06N
2203/066 (20130101); Y10T 428/31663 (20150401); D06N
2203/02 (20130101); D06N 2211/10 (20130101) |
Current International
Class: |
A41F
9/00 (20060101); D06N 7/00 (20060101); B32B
003/10 () |
Field of
Search: |
;117/37R,44,161ZA
;161/57,60,144,146,208,209 ;2/76,221,237 ;427/256,286,288
;428/195,196,200,447,225,262 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Herbert, Jr.; Thomas J.
Assistant Examiner: Hess; Bruce H.
Parent Case Text
This is a division of application Ser. No. 309,382, filed Nov. 24,
1972, now U.S. Pat. No. 3,854,978, issued Dec. 17, 1974.
Claims
What is claimed is:
1. A new waistband product comprising; a permeable base fabric
having a pattern of an elastomeric silicone compound adhered to one
surface thereof, said silicone compound being flexible at
temperatures of from -30.degree.F. to +250.degree.F., having a
Shore-A hardness of from 20 to 45, a tensile strength of from 250
psi to 500 psi, a percent elongation of from 100 to 500 percent and
a linear shrinkage of less than 2 percent whereby the product is
dry cleanable, washable, color fast, and has good frictional
characteristics.
2. The waistband product according to claim 1 wherein the base
fabric is a woven fabric.
3. The waistband product according to claim 1 wherein the silicone
compound is in a pattern of parallel lines.
Description
This invention relates to new and improved non-slip waistbands for
use in the waist encircling portions of trousers, pants, skirts and
the like.
Waistbands generally comprise a laminate of different fabrics which
serve different functions in the waistband. Waistbands may include
a fabric which provides body to the waist encircling portion of the
garment; a fabric which prevents roll-over of the waistband portion
of the garment and so forth. Usually these fabrics are covered with
a fabric generally termed a "curtain" fabric. The completed
waistband is sewn to the upper edge of the garment to provide the
final apparel waistband. In many instances, especially in
sportswear the waistband is also used to aid in holding down a
shirt or blouse and prevent the shirt or blouse from pulling out of
a pair of trousers or a skirt. Various techniques have been
utilized in the manufacture of waistbands to provide the waistband
with frictional characteristics to aid in the holding down of the
shirt or blouse. For example, bare rubber may be woven in the
waistband to give it frictional properties, or polyurethanes or
other polymers may be applied to the fabric in various patterns to
give the waistband some frictional characteristics. These past
techniques have all suffered from one or more of the following
deficiencies: lack of dry cleanability, lack of washability, poor
aging qualities in that the waistbands harden and crack and tend to
abrade during use, poor frictional qualities, lack of colorfastness
and the like.
We have now discovered a new product for use in waistbands which
has none of the above mentioned deficiencies and has good
frictional characteristics.
Our new waistband product comprises a permeable base fabric which
has a pattern of a silicone rubber elastomeric material adhered to
one surface.
To produce a product that has good washing and drying
characteristics, withstands dry cleaning, does not discolor, does
not crack, resists abrasion and has sufficient frictional
characteristics so as to hold down a shirt or blouse, the silicone
material should have the following properties:
A. Shore A hardness of 20 to 45;
B. tensile strength of 250 psi to 500 psi;
C. a percent elongation of from 100 to 500 percent;
D. a linear shrinkage of less than 2 percent; and
E. be flexible at temperatures of from -30.degree.F. to
250.degree.F.
In manufacturing our new waistband product the base permeable
fabric, which may be a woven knitted or nonwoven fabric, has
applied to one surface the silicone rubber elastomeric compound in
a pattern. The pattern may be a series of parallel lines or wavy
lines or dots or other patterns as desired. The silicone material
when applied must have a viscosity of from 12,000 centipoises to
25,000 centipoises and a tack-free time of less than 40 minutes. By
"tack-free time" it is meant the time it takes (at 77.degree.F. and
50% relative humidity) for the silicone material to form a skin on
its surface so that it is not sticky to the touch. After the
silicone material is applied it is allowed to seep into the
permeable portions or areas of the fabric to provide good bonding.
The silicone material is cured at a temperature of from
90.degree.F. to 185.degree.F. in an atmosphere containing at least
7 grains of water per cubic foot. The cured silicone is allowed to
age to remove volatile toxic materials such as acetic acid.
The invention will be more fully described in conjunction with the
accompanying drawings wherein;
FIG. 1 is a perspective view of the new and improved waistband
product of the present invention.
FIG. 2 is a schematic side view of apparatus for carrying out our
new process for manufacturing the improved waistband product of the
present invention.
Referring to the drawings in FIG. 1 there is shown a base fabric 10
having on the surface thereof the silicone rubber elastomeric
compound. The silicone rubber is in a series of three wavy lines
11.
The base fabric may be of any of the known curtain fabrics made
from woven, knitted, nonwoven materials and the like. The fabric
must have air permeability and be non-water repellent. If a woven
fabric is used the fabric should have a count of from about 40 to
120 threads per inch in the warp direction and 40 to 80 threads per
inch in the filling direction. The fabric may have any of the
various permanent press, wash-and-dry or other type textile
finishes applied to it as desired. In no instances can a water
repellent be applied to the waistband product as such will entirely
disrupt the bonding of the silicone elastomeric material to the
fabric.
The silicone rubber elastomeric material must be flexible at
temperatures of from below freezing to those temperatures normally
found in home or commercial washing machines and dryers. Hence
temperatures of from about 30.degree.F. below zero to temperatures
of from 250.degree.F. to 300.degree.F. are required. The silicone
material should have a Shore-A hardness of from 20 to 45 as
measured by American Society of Testing Materials, ASTM-D-676. The
silicone material should have a tensile strength of from 250 psi to
500 psi and a percent elongation of from 100 to 500 percent as
measured by ASTM-D-412. The silicone should have a linear shrinkage
of 2% or less.
In FIG. 2 of the drawings there is shown a schematic view of
apparatus for carrying out the method of the present invention. In
the method a roll of untreated "curtain" fabric 15 is carried by a
conveyor 16 beneath a silicone applying and metering head 17. The
silicone material is fed from a reservoir 18 through a pump 19 to
the head. The head may comprise a plurality of nozzles 20 or
hypodermic needles or other means for metering and feeding the
silicone onto the fabric. The nozzles may be oscillated and/or fed
intermittently to produce any desired pattern of the silicone on
the fabric. The silicone material used must have a viscosity of
from 12,000 centipoises to 25,000 centipoises. If it is not within
this range of viscosities it will either flow too greatly or plug
the needles or otherwise disrupt and make the process inoperable.
After the silicone is applied to the fabric it is allowed to remain
on the fabric for a fraction of a second up to a few minutes to
allow it to seep into the permeable areas or portions of the fabric
and produce adequate bonding. The reach of the conveyor from point
A to B allows the time for the required seepage. The seepage may be
carried out at room temperature and approximately 40% relative
humidity and requires only a short period of time but a finite
period of time.
After the silicone material is allowed to seep into the fabric the
fabric is passed through an oven 21 and the silicone material
cured. The silicone is cured at a temperature of from 90.degree.F.
to 185.degree.F. for a period of time of from 5 to 30 minutes at a
relative humidity of between 25 to 80 percent. The drying
atmosphere which is preferably air should contain at least 7 grains
of water per cubic foot for suitable curing. To produce suitable
fabric for use in waistbands the silicone should have a tack-free
time of less than 40 minutes. Approximately 11/2 to 4 grams of
silicone per linear yard of fabric is used to provide the requisite
frictional characteristics in the waistband product.
After the fabric with the silicone thereon is cured it is aged for
a period of a few hours to 24 hours or more. The aging is
accomplished by placing the fabric with the silicone thereon after
curing into cans 22 or cardboard cartons in a more or less
unconfined state to allow the silicone material to age, drive off
the acetic acid or other volatile materials which might disrupt the
final properties of washability, dry cleanability, color fastness
and the like.
After the treated fabric is aged it is rolled onto spools or
otherwise packaged and utilized in the manufacture of apparel such
as trousers, skirts and the like.
From the foregoing description it will be appreciated that the
objects and advantages set forth in this invention have been fully
achieved. Modifications will become apparent to those of ordinary
skill in the art after reading this disclosure and it is to be
understood that this invention is not necessarily limited to
details described since the spirit and scope of the invention is
defined by the appended claims.
* * * * *