Strength loss indicator for synthetic yarns
a technology of strength loss and synthetic yarn, applied in the field of webbing, can solve the problems of many synthetic yarns being subject to molecular breakdown, and none of these inventions are directed to phosphorescent yarns
Inactive Publication Date: 2005-08-18
SOUTHERN WEAVING
View PDF10 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
"The present invention provides a webbing made of synthetic yarns that have an indicator for indicating exposure to ultraviolet light which results in strength loss of the yarns. The indicator comprises a strip that includes a phosphorescent material that produces a glow when exposed to ultraviolet light. The ability of the phosphorescent material to glow fades at a rate which may be correlated to the rate of loss of tensile strength of the yarns due to ultraviolet light exposure to indicate the condition of the webbing. The webbing can be made of fabrics which are woven, knitted, or non-woven and can be used for safety harnesses, tie-downs, or slings. The strip can be incorporated into the webbing or applied to its surface. The phosphorescent material includes a luminescent phosphor to provide the luminescent glow of the strip."
Problems solved by technology
However, none of these inventions are directed to a phosphorescent indicator in which the luminescent properties decay at a predetermined rate corresponding to the ware of the product.
Notably, many synthetic yarns are subject to molecular breakdown in the presence of ultraviolet light.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] With reference to the drawing, the invention will now be described in more detail. FIG. 1 shows a section of webbing, designated generally as A, woven of synthetic yarns. It is to be understood that the webbing could be knitted or a non-woven. As shown, the webbing is a single layer fabric, however, multi-layer webbings also find utility with the indicator of the invention.
[0012] By way of example, the webbing is of the type commonly used to produce items such as a safety harness, a tie-down, and a sling web. It is well known that exposure to ultraviolet light causes significant breakdowns between the molecular bonds in the majority of commonly used synthetic yarns, such as nylon, polyester and Kevlar. Previously, there was no true way of measuring the ultraviolet damage or breakdown on webbings made of such materials. This can result in the dangerous overuse of products and particularly such products as industrial fabrics which may have lost the ability to support the origi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A webbing formed of synthetic yarns having an indicator for indicating exposure to ultraviolet light which results in strength loss of said synthetic yarns. The strength loss indicator comprises a strip extending along at least a portion of the webbing. The strip includes a phosphorescent material that produces a glow when exposed to ultraviolet light. The phosphorescent material is adapted to lose its ability to produce a glow over time exposure to ultraviolet light. Advantageously, the ability to glow fades at a rate correlated to the rate of loss of tensile strength of said synthetic yarns due to ultraviolet light exposure to indicate the condition of the webbing.
Description
FIELD OF THE INVENTION [0001] The present invention relates to a webbing formed of synthetic yarns having an indicator for measuring exposure to ultraviolet light which results in strength loss of the synthetic yarns, and more particularly, to a phosphorescent strip included in the webbing that glows when exposed to ultraviolet light, and wherein the phosphorescent material loses its ability to produce a glow over time exposure to ultraviolet light, which is correlated to the rate of loss of tensile strength of the synthetic yarns due to ultraviolet light exposure to indicate the condition of the webbing. BACKGROUND OF THE INVENTION [0002] The prior art is replete with various inventions directed to the methods of providing phosphorescent textile fibers and used therefore. However, none of these inventions are directed to a phosphorescent indicator in which the luminescent properties decay at a predetermined rate corresponding to the ware of the product. Notably, many synthetic yarn...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): D02G3/40D03D15/00D04B1/14
CPCD02G3/346D02G3/404D03D15/00D03D15/0033D04B1/14D10B2321/021D10B2401/041D10B2321/041D10B2321/10D10B2321/121D10B2331/02D10B2331/04D10B2331/10D10B2321/022Y10T442/20D03D15/54
Inventor PEDIGO, JOHN A. JR.
Owner SOUTHERN WEAVING