Plain and simply, tensile strength is the ability of a material to resist a direct pull. When referring to ultimate tensile strength, it is the maximum stress that can be withstood before breaking. Commonly the tensile strength is expressed in pounds per square inch.
A higher tensile strength is generally preferred for a variety of packaging products. When packaging heavier products a packing tape with a higher tensile strength is preferred to help ensure a better seal. The same goes for companies shipping heavier products by the pallet load. A stretch film with a higher tensile strength will reduce shipping damages and increase load stabilization.
The elongation of a material refers to the difference of length between an unstretched tensile-strength sample and the breaking point length. High elongation is great for stretch films and help to secure and unitize a load. It is also important for a stretch film to have an adequate tensile strength for the load it is securing.
Next post we will discuss tear strength and impact strength.