The additive ingredients in the EVA foam formula include scrap materials, antistatic agents, flame retardants, and quick-cooking agents.

Scraps: These are leftover trim and strips from the manufacturing process, already expanded, significantly reducing production costs, though affecting physical properties. Virtually all EVA-using companies utilize scraps.

Antistatic Agents: EVA foam products inherently possess strong static electricity. To prevent static buildup, antistatic agents must be added, typically in a concentration of 3%-5%.

Flame Retardants: For EVA foam products requiring flame retardancy, flame retardants can be added to achieve the desired effect. Common flame retardants include Mg(OH)2 and Al(OH)3, which are used in large quantities, typically ranging from 12% to 20%. However, for products with high flame retardancy requirements, these flame retardants may not be ideal.

Quick-cooking Agent: To increase daily output and reduce energy consumption, quick-cooking agents can be added to shorten the foaming time. The common quick-cooking agent is TAIC, which is actually a bridging assistant.

The selection and amount of these additives depend on the specific application and performance requirements of the product.