B. The method used to determine the hardness value of plastic or flexible materials is called Shore hardness value. It is used to measure the hardness of polymers, elosters, rubbers, fabrics, sponges. Shore-A and Shore-D are most commonly used in measurements. It is classified according to the puncture tip and the weight used.
Using the Shore-A method; In general, the hardness of soft materials such as elastomer, vinyl, rubber, rubber, leather, PVC, silicone rubber, teflon, neoprene, such as polyester, ABS, nylon, polyurethane, polyamide, kevlar, acryl, wood and polystyrene using the Shore-D method It is used to measure the hardness of more rigid materials. Shore-D method is used to measure the hardness of engineering plastics.
In this application, how much the hardness tip penetrates the material is measured. The plunging tip is driven by a spring system with properties specified by international norms. The higher the hardness value of the material, the lower the immersion depth; but the applied force will be just as high.
Different forms of stiffness (plunge) ends and spring characterizations; It is designed in accordance with Shore hardness in different scales. The most well-known Shore Hardness Scales are Shore A and D. In addition, different hardness scales such as Shore B, C, 0, 00, 000 and D0 can be used for special applications.
The field of application of Shore Scale hardness tests starts with soft elastomer (Shore A) materials and covers a wide area from rigid thermoplastic materials (Shore D).