Unverified80% confidenceDecision RuleTime unknown
填充软硬度选择：记忆棉密度≥50D才能长期保持腿间支撑不塌陷，纯棉/中空棉填充1-2个月后会明显压扁，导致两膝重新贴合
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80%
Confidence
Long-term
Relevance
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Unverified填充选高密度记忆棉（40D以上）支撑更稳定不塌陷，纯棉花/PP棉填充2-3周即压扁失去支撑力，不建议长期哺乳使用87% similarUnverified慢回弹记忆棉密度≥50D才能提供有效颈部支撑，＜40D的低密度棉2-3个月内会明显塌陷失去承托力84% similarUnverified定位垫内芯优先选高密度慢回弹记忆棉（密度≥45D）或高弹海绵，纯棉花填充易结块塌陷失去固定力，通常3个月内就变形81% similarUnverified记忆棉密度决定寿命与支撑：50D以上密度回弹慢、支撑久坐不塌陷；40D以下低密度棉3-6个月即出现永久性凹陷失去减压作用81% similarUnverified碎记忆棉填充使用数月后会逐渐压实变平，需要定期拍打蓬松或补充填充物以维持初始高度和支撑感81% similar
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