Why Is Tear Strength Important for Mold Making?
Prevents Mold Tearing
When removing a casting from a silicone mold, the mold may need to stretch around protruding shapes or narrow sections. Silicone with suitable tear strength is better able to resist tearing during demolding.
Extends Mold Service Life
Repeated casting and demolding can gradually damage vulnerable areas. Appropriate tear strength can help reduce premature mold failure and extend the useful life of the mold.
Protects Fine Details
Molds for figurines, sculptures, decorative objects, and intricate prototypes often contain thin edges and delicate features. Good tear resistance helps these areas withstand repeated handling.
Supports Complex Mold Designs
Molds with deep undercuts or complicated geometries often require significant stretching during demolding. High tear strength is particularly valuable for these applications, although mold design and silicone flexibility are also important.
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