DE2322642A1 - CROCHETED SEALING TAPE MADE OF DURABLE FIBERGLASS MATERIAL - Google Patents

Description

PATENTANWÄLTE Drpi.-ing, H. Seiler Dipi.-ing. J. Pfenning Dipi.-Phys. KH Meinig

4053-B

1 Berlin 19

Oldenburgallee IO Tel. 0311/304 55 21 3O455 22

Wire word: rope defense patent! Postal check. Bln.W.59 38 \

May 2, 1973 Me / Ro

JOHNSi-MANVILLE CORPORATION

22 East 40th Street I.

New York, NY 10016 USA

Knitted sealing tape made of durable fiberglass material

The invention relates to sealing strips made of knitted, woven or similarly processed, stable and correspondingly stable glass fiber material. The use of ron tape-shaped sealing strip is particularly advantageous where the work required eur attaching the same meaningful comparison with the cost of a pre-formed sealing

309847/0454

device allows, or where the opening to be sealed flange is too large or too irregular in shape for an ordinary prefabricated seal, or eventually where the installation makes it impossible to put such a seal. In addition, the use of band-shaped Sealing strips are especially effective where there is only very little pressure applied to the Sealing material may take place, this being sufficiently soft and resilient in its material properties got to. The use of sealing strips is generally known in connection with light metal flanges in furnace installations and about also between the individual device sections of corresponding bridge members or also at Ein ^ directions of the Navy and Air Force and ultimately also in fractionation plants for oil, corresponding refineries and the like more.

The known sealing strips used here are usually made of asbestos fiber material. As a result of the uneven or indefinite use and incorporation of uniform asbestos fiber quality and the relatively high cost that comes with the production of such fiber tapes are connected, it has been found, however, that the use of asbestos fibers is not particularly advantageous for such purposes.

309847/0454

The other problems and difficulties present relate to it in particular also on the textile processing of the asbestos fibers and the necessity of their production different types of asbestos fiber tapes, which are suitable for normal environmental conditions as well as for those of the chemical Industry must be usable, and it was therefore to be considered to replace the asbestos fiber material with something which is also is sufficiently soft and compressible to substitute for the manufacture of sealing tapes.

According to the invention, therefore, a novel sealing tape is created, which consists essentially of sufficiently stable and durable glass fiber material that is necessary for its sealing effect is sufficiently soft and compressible and in this respect can be compared with the asbestos fiber tape leaves or has even better properties in this comparison. The sealing material assembled according to the invention can be produced particularly economically, is of uniform and constant quality, is compared with the asbestos fiber material resistant to even higher temperatures and has the asbestos material opposite a broader range of chemical resistance and ultimately requires only little effort in terms of its textile-like Processing for the production of a paser yarn.

308847/0454 - 4 _

According to the invention, a sealing tape is created that!

by means of a soft, elastically resilient strip made of ge j

denotes knitted or woven glass fiber yarn, where j

the yarn is made from durable glass fibers of any length:

composed and according to the arbitrary length of the; Fibers and a high degree of disorder in the same

Yarn that appears soft and compressible. The erfindungsge- \ Permitted sealing strip is suitable both for regular encryption j application purposes, as well as for those in the range of ^for-: mix industry, such as acids and the like.
The glass fiber material, in which the individual fibers can be of any length, can be produced, for example, by the well-known Schuller process. According to the! different and arbitrary lengths of the individual fibers
and their high degree of disorder in the yarn, its properties are both soft and therefore sufficient
voluminous, elastic and springy, as well as being well compressible. It is also essential that "ee" be
bring the yarns into these reinforcing strands,
which are spirally wrapped around the circumference of the glass yarns
will. The sealing tape is characterized by its solid construction, and there is also a so-called "drop-warp" embodiment, which is also known as a "bolt-hole strip" as a further example of a sealing strip
is.

3098A7 / O45Ä _ ς _

The invention relates to both types of seal material. One sealing tape is of stable construction, while the second exemplary embodiment is designed in such a way that that some warp threads are left out (a drop-warp construction). The latter embodiment of a weather strip is produced by gaps or voids or pores in the longitudinal direction that form it enable bolts, rivets or similar fasteners to be passed through the tape material, without the need to punch holes through the strip. The sealing tapes to be considered for this purpose generally have a width of about 2.5 to 10.2 cm and a thickness of approx. 1.6 to 3.2 mm in a single layer structure. These details regarding the width and thickness should only be mentioned as examples; any other dimensions are of course also possible possible.

In the present exemplary embodiment, the sealing tape, as a percentage by weight, consists of approximately 92 56 fiber cut, 3 i » a substance with antistatic and lubricating properties and 5 3 * PVA fibers or yarn. The solid glass fibers in the yarn are of any length, essentially having lengths of approximately 10 cm to 51 cm, but also fiber sections which are shorter

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than 2.5 cm. As a result of the different lengths of the strands and their high amount of disorder in the yarn, i.e. their low alignment to one another, this has a soft, i.e. voluminous and elastically resilient one Quality that makes it particularly compressible. As a result, there is also a strip made of such a soft, compressible material made of resilient yarn, with the same properties. The composite as described above Fiberglass tapes are quite good in terms of their sealing capacity, their compressibility and their resilient properties comparable to those made from asbestos fibers, with a higher temperature resistance and show another area of chemical resistance. The chemical resistance results in particular when the glass fibers consist of a so-called "0 glass" or a corresponding chemical quality glass. Accordingly, according to the invention formed sealing strips can be used both as normal sealing material and as such that are compatible with Comes into contact with acids.

The glass yarn is made with antistatic and lubricating properties containing substance soaked during the manufacturing process in order to twist and weave the yarn facilitate. The antistatic substance is also retained in the end product and improves its handling properties here.

30984770454 _?

ability and grip of the sealing tape. Although even- I understandable any anti-static and greasy self- '

i shanks possessing substance in connection with the her-;

position of the inventive Diehtungsband used!

It is particularly advantageous to use an alcohol phosphate which is sold under the trade name I Zelec NK by the company EIDU PONT de Nemours
will. i

In order to hold together the partially only loosely held glass fibers of different lengths in the yarn, this is done with

one or more reinforcing yarns in a spiral!

I wraps, which increases the firmness of the yarn as well

its cohesion is significantly improved. In one
In the preferred embodiment, a PVA yarn is used, as is commercially available under the trade name "Kuralon"
appears. Instead of this yarn, however, tree:
wool, rayon and fiberglass yarn used for wrapping
will.

The sealing strip according to the invention is produced by first producing fiber cuts from solid glass fibers
be, preferably those that are after
so-called "Schuller method" result. Such sections of fiber
are sufficiently soft and compressible due to their different lengths and their high degree of disorder.

309847/0454

alignment to each other. In addition, the fiber sections can also be made of C-glass, which is particularly characterized by its chemical resistance. The density of the fiber cuts used is normal

wise in a range of 440 to 550 jard pounds. The j

Fiber sections are first treated with the antistatic and \

- i treated lubricating agent while being by a coil-;

body of a slip-on creel of a spinning machine or a |

Delivery plant (creel bank) to a winding device in the; or the cores of the same are moved, whereby it is about

can be a Lesona winding machine. I.

The fiber sections are then made up of the cores or cones taken and run through a twine twister, for example a Prince Smith twine twister, in which the twine is twisted which is approximately 1.5 to 2 turns per 2.54 cm. At the same time, the fiber cuts are in twisted with the twine, with one or more ends of the PVA yarn being fed to the fiberglass cuttings in a way in which the PVA yarn or yarns are helical wrapped around the fiberglass sections. In waterproofing tape yarns approximately 1.6mm thick If you want to, put two ends of PVA yarn around the fiberglass sections

309847/0

wrapped. For yarns that are used to make sealing strips with a thickness of about 3.2 mm four ends of PVA yarn wrapped around the fiberglass sections. While the twisting of the fiber sections in "S" or in In the "Z" direction, the PVA yarn is wrapped around the strand in the opposite direction. The following The table should indicate typical fiber cut densities and twist values of the fiber sections:

Fiber cut twist tight twists in the direction of Yde / lb nominal per 2.54 cm

1.66 mm tape Warp & Pill 550 2.1 "S" (warp and weft)

3.2 mm tape Warp HO (warp) 1.6 "S"

Fill 280 (weft) 1.8 "S"

The fiber sections, which now become a soft and compressible Yarn have been processed, whereby they are composed of random lungs of stable glass fibers, lie with each other in very different orientations and now run through a loom, about a four-way spacing or a four-space or eight-space Tex-nova shuttleless loom, in which the yarn as prepared above is used as fill thread and warp thread and thus as warp thread or filler material will.

- 10 309847/0454

purely the fixed form of training mentioned at the beginning
stable tape, a woven tape is made, which has about 16 warp threads per 2.54 cm width or length, ι

while 7 double filling threads or yarns per 2.54 cm length i can be used for a sealing tape 1.6 mm thick. The ; equal number of warp and filler threads or weft threads j are used per 2.5 cm tape in the second embodiment (drop-warp construction) with the measure that | a number of ends are dropped in the middle of the strip to form a longitudinally extending I.

Bring out gaps, which in the transverse direction only through j

Weft threads (fill) is held together. To maintain a tight sealing edge on both sides of the
Slit or gap will put two ends 150-2 / 2 in
Bends and curves or as warp threads
pulled each side of the gap. The gap can be in his
Width vary to reflect the use of bolts or rivets
to allow attachment of the strip without going through
these holes punched or in any other way
must be introduced. The following tables give details for 1.6mm thick strips and tapes, both
in the solid design and weave, as well as in the,
in which warp threads have been left out, again.

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309847/0454

Fixed embodiment of a sealing tape 1.6 mm (1/16 in.) thick

Hooks per 2.5 cm when doubling

Weber weft total comb (picks / inch width ends (reed) double fill) Bobbin thread

2.54 cm 18 7/2 7 150-2 / 2 laser glass j

5.08 cm 32 7/2 7 150-2/2 fiberglass

7.62 cm 50 7/2 7 150-2 / 2 fiberglass j

10.16 cm 64 7/2 7 150-2 / 2 fiberglass j

Embodiment with dropped warp threads (Drop-Warp Construction) for 1.6 mis-sized tape,

Number of end hooks per den that is 2.5 cm

double drop before weft weft Overall the ends are comb (picks / inch width ends in ctr. (Reed) double fill) bobbin thread

2.54 cm 14 4 7/2 7 150-2 / 2

Fiberglass

5.08 cm 24 8 7/2 7 150-2 / 2

Fiberglass

7.62 cm 40 10 7/2 7 150-2 / 2

Fiberglass

10.16 cm 54 10 7/2 7 150-2 / 2

Fiberglass

- 12 -

3 0 9 8 4 77oT 5 4

-12- j

Sealing strips 3 »2 mm (1/8 inch) thick were used. j weaves with about 14 warp threads per 2.5 cm width and 5 j

Double weft threads per 2.5 cm. For the so-called "Drop-Warp ^11" embodiment, as for the sealing strip with a thickness of 1.6 mm, a number of ends were dropped in the middle area of the tape, ie thread was left out here. The seal on both sides of the resulting material middle gap is created by pulling two ends 150-2 / 4 fiberglass as warp threads on both sides of the gap. Threads are dropped or omitted, and for the embodiment in which threads have been omitted, namely the so-called drop-warp construction for tapes with a thickness of 3.2 mm (1/8 inch). "",. _ .., ^

-. ^x '' Fixed version:

Hooks per 2.5 cm with double Weber weft total comb (picks / inch Wide ends (reed), double fill) bobbin thread

2.54 cm 14 6/2 5 150-2 / 2 fiberglass

5.08 cm 28 6/2 5 150-2 / 2 fiberglass

7.62 cm 42 6/2 5 150-2 / 2 fiberglass

10.16 cm 56 6/2 5 150-2 / 2 fiberglass

- 13 "" 3 0 9 8 4 7/0454

"Drop-Warp" construction:

Number of end hooks per den that is 2.5 cm

Dropped double wor- Weber weft total- den are comb (picks / inch Width ends in ctr. (reed) double fill) bobbin thread

2.54 cm 10 4 6/2 5 150-2 / 2

Paserglas

5.08 cm 22 6 6/2 5 150-2 / 2

Fiberglass

7.62 cm 34 8 6/2 5 150-2 / 2

Paserglas

10.16 cm 48 8 6/2 5 150-2 / 2

Paserglas

The characteristic wire straps of 1.6 mm and 3.2 mm Thickness and a width of 2.54 cm to 10.16 cm consist of single-layer according to the embodiment according to the invention Plain structures in the manner of fabrics in which the weft threads are doubled (double pick manner). The density in foot pounds - 10 # is for both embodiments, i.e. for the fixed as well as for the drop warp as follows:

Solid drop warp

2.54 5.08 7.62 10.16 2, 54 10.16 5.08 7.62 density-ft / lb

1.6mm 53.5 26.5 17.8 13.5 56.0 28.0 19.6 14.5 3.2 mm 23.0 12.0 7.7 6.0 25.0 12.5 8.3

309847/0454

The sealing strips produced in the manner described have a minimum glass fiber content τοη 92%. The ultimate tensile strength is a minimum of 3,500 pounds / inch, ie
approx. 0.24 kg / c «. The soluble chloride content in parts per
1 million is a maximum of 100 and the acid resistance is good.
The sealability of the sealing tape designed according to the invention was with those made of asbestos fibers, as it is under the trade name 122 Underwriters Grade and further than
Asbestos tape under the trade name AAA grade from the
JOHNS-MANVILLE CORPORATION is compared.
: The tests were run on a 300,000 pound Southward
Emery Compression Tester, by means of which the

ρ Ο

Material printing of 3.50 kg / cm (50 pounds / inch), 7.0 kg / cm
(100 pounds / ineh), 14 kg / cm ² (200 pounds / inch) and 21 kg / cm ² (300 pounds / inch) on 2.08 by 7.62 cm flat strip samples. For each test, gas under a pressure of 2.54 cm water column was passed through a bore above which
the tape was centered, and the amount of gas leakage from the strip was measured.

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309847/0454

7322642

properties

Asbestos THERMO-CHEM Style

(glass) ^

Asbestos style

AAA grade

Hominal size, inch 2x1 / 16 Thickness, inch 0.062 Density, lb / 100 ft 3.8

2 χ 1/16 3 χ 1/16 O .065 0 .066 4th .8th 7th .0

3 sealing capacity cm / min.

Belaatnng dtr seal

50 psi through

cutting area 53 area 45-64

100 psi avg 42

range 35-46

200 psi Darcheehn- 21

range 16-25

300 psi avg 17

area 13-21 360
150-540

294
150-390

131
100-160

56
47-74

119 108 -

64 63 -

21 20-22

10

According to the invention, a sealing tape is created which is sufficiently compressible, soft, heat and acid resistant.

-16-

309847/0454

Claims (6)

1. Sealing tape, 'characterized in that that it consists of a soft, elastically resilient strip of woven glass fiber yarn that consists of composed of stable, stable glass fibers of any length and according to the different fiber lengths, and a high degree of disorder in the alignment of the fibers to one another is soft and compressible. 2. Sealing strip according to claim 1, characterized in that the yarn wraps around this reinforcing strand material is. 3. Sealing strip according to claims .1 and 2, characterized in that the reinforcing strand material wrapped individually and spirally around the yarn. 4. Sealing strip according to claims 1 to 3, characterized in that the reinforcing yarn is a PVA yarn is. -17- ■ if 5. Sealing strip according to claims 1 to 4, * "characterized in that a plurality of warp threads (warp yarns are omitted or skipped during the weaving process of the strip, so that there is a middle column in which
Running in the longitudinal direction, results through which weft threads (fill yarns) connecting the lateral sections of the strip are passed. 6. Sealing tape according to claims 1 to 5, characterized in that that the glass used for the glass fibers is a so-called C glass is. 309847/0454