The waterproof overshoes are new product that are emerging in recent years, which use natural rubber added by new type durable slip-resistant additives as raw material, combining the advantages of rubber boots and disposable plastic shoe cover.

The waterproof overshoes are lighter than rubber boots and easy to carry. In rainy or snowy days, shoes can be protected from water and mud by wearing overshoes outside. Overshoes can also be used in the ancient buildings, research institutions, medical institutions, hotels and family to protect the ground and prevent ground contamination. In contrast to disposable plastic shoe cover, the overshoes are more durable, recyclable, degradable, slip-resistant and easy to carry and clean and that is why they are well received by the public.

The waterproof overshoes are usually composed of two parts i.e. cover and sole. The two parts are combined by heat sealing and the heat seal strength shall be sufficient otherwise the sealing area may be broken and as a result the overshoes may not be able to protect the shoes properly. Therefore, it is necessary to measure the heat seal strength of the overshoes.

This article provides a simplified test method of the heat seal strength of waterproof overshoes for your reference. The testing instrument used for the tests is Labthink XLW(PC) Auto Tensile Tester.

Figure 1. Waterproof Overshoes

The tests shall be performed according to the following procedures.

(1) Cut 10 pieces of specimens from the sealing area of the provided sample. The width of the specimen shall be      150mm and the spread length of the specimen shall be 100mm.

(2) Set specimen width, test speed and other test parameters.

(3) Clamp the two ends of the specimen in the sample grips. The longitudinal axis of the specimen shall coincide with the line of centers of the sample grips.

(4) Click Test to start the test. The system will record the force values in the testing process and calculate the test results automatically.

For more details about XLW(PC) Auto Tensile Tester, please visit www.labthink.com

About Labthink Instruments Co., Ltd:

Labthink Instruments Co., Ltd is one leading supplier of packaging testing instruments, which is headquartered in Jinan, China and operated in Boston, U.S.A.