Elastic tensile-resistant sponge and method for producing the same

Abstract

This invention relates to the field of sponge technology, specifically disclosing an elastic tensile-resistant sponge and its preparation method. The elastic tensile-resistant sponge comprises, by weight, 25-35 parts of PPG5631, 45-55 parts of PPG3602, 15-25 parts of PEG2000, 2-3 parts of water, 0.6-1 parts of silicone oil, 0.8-1 parts of DEOA, 0.3-0.4 parts of A33, 0.02-0.05 parts of T9, and 40-45 parts of MDI. To improve the poor tensile strength of existing sponges, this invention adds PEG2000 to the formula. PEG2000 has a hydroxyl value of 56 and is composed entirely of EO segments, exhibiting excellent flexibility and extensibility, demonstrating good elasticity and low indentation hardness. Due to the good flexibility of the EO segments, the urethane bonds formed by their reaction with NCO in MDI more easily form hydrogen bonds, thus exhibiting flexible segments with better tensile strength. The results of this invention show that the product not only improves its poor tensile strength, but also has more uniform foam and better elasticity. Under the action of external force, it can move in the direction of the force, so it can be called elastic tensile sponge.

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