Wet Cataplasma Aging Tests

In the automotive industry, some automakers use the wet patch or wet cataplasm method. In this method, samples of bonded parts are placed in contact with water-impregnated cotton, placed in a plastic impermeable bag, and then stored at a certain temperature for a certain period of time. Before and after this test, the mechanical strength of the sample (such as tensile shear strength) is measured and the acceptable percentage loss of property for a given application is determined.

Industries other than automotive have their own special wet cataplasma tests. For example, in the textile and apparel industries, special tests are carried out to simulate the washing resistance of bonded parts in washing machines. In other industries, special test methods are applied for packages used in very humid and hot climates (especially in tropical regions).

Cataplasma is also a type of patch applied to the body by wrapping gauze in porridge prepared with herbal flours. It is generally used in musculoskeletal and joint disorders, soft tissue disorders such as sprains and injuries. In other words, cataplasm is a medical dressing consisting of a soft clay mass that is rubbed on a cloth and applied to the skin for purposes such as treating inflamed or crushed areas or improving circulation. Cataplasm contains about 40 percent water, which speeds up absorption.

In order to accelerate the deterioration of the adhesive effect of cataplasm with humidity and temperature, cataplasm aging tests are performed. During this test, samples are placed in a 70 degree soaking environment. To obtain this environment, the samples are individually wrapped in cotton soaked with deionized water. Cotton and samples are placed in sealed polyethylene bags. The bags are placed on a stand in a container of approximately 20 liters. There is 5 cm of deionized water at the bottom of the container and the container is closed with a lid. The container is then placed in an oven at 70 degrees. Cataplasma aging is done for 5 weeks.

Cataplasma samples are allowed to dry for 23 hours at room conditions (35 degrees and 72 percent relative humidity) before testing. This cooling and drying time is necessary as the presence of extreme humidity and high temperatures greatly affects the test results of adhesive joints.

Our organization also provides wet cataplasma aging testing services with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.