Textiles: weaving – Fabrics – Materials
Reexamination Certificate
2000-02-17
2001-10-02
Calvert, John J. (Department: 3741)
Textiles: weaving
Fabrics
Materials
C139S38300A, C139S4260TW
Reexamination Certificate
active
06296023
ABSTRACT:
The invention relates to a woven fabric for manufacture of articles of work clothing for protection from heat, flames, electric arc effects, and the like.
The need has long existed for welders for the development of materials for protective clothing articles which meet the high requirements for low flammability, for example, and afford high wearing comfort. It is to be added that these articles of clothing are intended for industrial operations, that is, they are made available to personnel for a short period of time, after which they are cleaned and are used again. A large number of wearings is required; hence, a long service life is an important requirement, and over the service life, the pertinent testing regulations must be compiled with.
In the past, the materials provided for this purpose have never been able to meet all the requirements of the testing regulations and ensure wearing comfort at the same time. For the most part, thermally stable articles of clothing have provided very low wearing comfort for the person protected. It is to be noted in this connection that the thermal effect itself represents stress on the person at work.
The typical requirements which the woven fabric or an article of clothing made from this fabric must satisfy include:
1. Meeting the requirements for thermal stress in the form of contact or radiative heat or from open flame.
2. Safety from sparks and minute bits of incandescent metal flying at high speed and generated, for example, by welding, cutting, or flexing.
3. Protection from the action of light arcs through electrical discharges.
4. Resistance to mechanical stresses applied by objects with sharp edges, such as sheets of metal.
5. Ability to withstand the stresses resulting from industrial treatment in cleaning and restoration of the protective effect (washing, drying, decontamination).
6. Achievement of high physical comfort during wear.
For example, protective clothing consisting of trousers and a jacket is known (DE 91 01 311 UI). Its object is to protect its wearer from the action of flame and for this purpose, has a first outer layer of flame-retarding fabric for prevention of the flow of electricity through the body, a second windproof and watertight but water vapor-permeable barrier layer against passage of current, a third low-flammability electric barrier layer, and a fourth, innermost, lining layer. Protective clothing such as this may be used only in an electrical environment, if at all, and affords only slight comfort for its wearer.
A textile material for the inner lining based on multifilament amide thread for increasing the wearing comfort of protective clothing of firefighting personnel is known (DE 44 08 141 A1). However, the properties relevant to protective clothing cannot be maintained after repeated cleaning of the state-of-the-art inner lining.
The invention undertakes solution of the problem of meeting all the requirements indicated above by means of a woven fabric, in particular also if an article of clothing has been cleaned many times.
This solution is achieved by means of the materials, properties, and structures indicated in connection with which the following embodiments are discussed.
“Count” refers to a method of expressing the length per unit mass of a yarn. “Yarn” is a generic term for any linear textile structures. “ISO 2060” refers to the yarn fineness. “ISO 3572” refers to the binding of the fabric. “DIS 721 1/2” refers to the number of threads in a chain and weft orientation. “ISO 3801” refers to the fabric weight in g/m
2
. “NOMEX” is a trademark name of meta-aramide manufactured by DuPont Co. “KEVLAR” is a trademark name of paramide manufactured by DuPont Co. “Visc. Fr.” represents the Viscose Flame Retardant Count.
REFERENCES:
patent: 3744534 (1973-07-01), Henry et al.
patent: 4001477 (1977-01-01), Economy et al.
patent: 4067210 (1978-01-01), Arons et al.
patent: 4331729 (1982-05-01), Weber
patent: 4573500 (1986-03-01), Bouglas
patent: 4865906 (1989-09-01), Smith, Jr.
patent: 5150476 (1992-09-01), Statham et al.
patent: 5356700 (1994-10-01), Tanaka et al.
patent: 5399418 (1995-03-01), Hartmanns et al.
patent: 5527597 (1996-06-01), Stanhope et al.
patent: 35 44 493 (1987-01-01), None
patent: 44 08 141 (1994-10-01), None
patent: 0 228 026 (1987-07-01), None
patent: 0 432 100 (1991-06-01), None
patent: 2 179 068 (1987-02-01), None
Burg Reinhilde
Gehrhardt Manfred
Görmer Michael
Smeulders Britta
Anderson Chad C.
Calvert John J.
Muromoto Jr. Robert H.
Shannon John P.
Venable
LandOfFree
Woven fabric for work clothing parts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Woven fabric for work clothing parts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Woven fabric for work clothing parts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2617280