Method and system for standardized classification of undergarments
View Patent ↗The clamps of the present invention are initially placed apart with a specific separation to properly hold the garments in the constant rate of expansion (CRE) machine. The test method preferably uses panties that have been prepared according to specific test criteria and the CRE machine pre-programmed with specific parameters including the preload and the initial rate of extension. Before testing commences, the midpoint of an individual panty is placed at the center of the clamps. After a pre-determined resistance is sensed by the CRE machine, the rate of extension and the load instantly increase to test the panty's percent of elongation and modulus. This method is repeated for several styles and sizes of panties to obtain accurate, consistent elongation and modulus measurements for each style and size. These measurements thus categorize all of the measured styles and sizes into a standardized panty support classification system.
1. A method for classifying undergarment support, comprising:
mounting an undergarment on a constant rate of elongation apparatus configured to stretch the undergarment;
actuating the apparatus to stretch the undergarment;
measuring percentage of elongation of the stretched undergarment;
comparing the measured percentage of elongation to predetermined ranges of undergarment elongation, and
classifying the undergarment support based on the comparison of the measured percentage of elongation to the predetermined ranges of undergarment elongation.
2. The method of claim 1 , wherein said ranges of elongation are three ranges that comprise from about 150% to about 240%, from about 95% to about 150%, and from about 40% to about 95%.
3. The method of claim 1 , wherein the step of mounting the undergarment on the constant rate of elongation apparatus comprises placing an undergarment on a first clamp portion of a first clamp and on a second clamp portion of a second clamp on the apparatus.
4. The method of claim 3 , wherein the first clamp portion and the second clamp portion are a predetermined initial distance apart.
5. The method of claim 4 , wherein the predetermined initial distance is 254 mm.
6. The method of claim 3 , wherein the undergarment is a panty positioned on the clamp portions at a midpoint of a top of a waistband and a top of a leg hole.
7. The method of claim 3 , wherein said undergarment is a panty positioned on the clamp portions at a predetermined distance from a top of a waistband and a top of a leg hole.
8. The method of claim 7 , wherein the predetermined distance is about 4 inches.
9. The method of claim 3 , wherein the step of actuating the apparatus to stretch the undergarment comprises:
the first clamp and the second clamp moving apart at a first predetermined rate and with a first predetermined force;
measuring force with the apparatus due to stretching of the undergarment as the first clamp and the second clamp move apart; and
the first clamp and the second clamp moving apart at a second predetermined rate and with a second predetermined force based upon the measured force.
10. The method of claim 9 , wherein the first predetermined rate is about 350 mm/min and the first predetermined force is about 0.1 kg.
11. The method of claim 9 wherein the second predetermined rate is about 508 mm/min and the second predetermined force is about 4.0 kg.
12. The method of claim 1 , wherein the undergarment is first prepared according to specific testing criteria.
13. The method of claim 12 , wherein the undergarment is relaxed on a flat surface at a standard atmospheric condition of 70° F. ±2° F. temperature (or 21° C. ±1° C.) and 65% ±2% relative humidity for a minimum of four hours.