Question: what are the chemical properties of polyester?
Answer: Tenacity: 5 – 7 gm/den. Elongation at break: 15 – 30% Elastic modulus: 90. Elasticity: Good. Moisture Regain (MR%): 0.40% Specific Gravity: 1.38. Melting point: 2500C. Volumetric Swelling: None.