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Sustainable Packaging Material Solution for Refill Systems Reference Standard: Relevant material and performance testing standards include ASTM D1693 for polyethylene environmental stress-cracking resistance and ISO 9001:2015 quality management principles for controlled production and inspection. Short Answer A sustainable packaging material becomes more practical when the container structure separates long-life components from replaceable parts. In a refill airless system, the PP pump, PE inner bottle, and PP outer case are assigned different service roles, helping brands reduce unnecessary full-container replacement while keeping formula protection and user handling measurable. When the Outer Case Stays in Service Longer Than the Formula Inside Sustainable packaging material is often described through recycled resin content, biodegradability, … 続きを読む