1. The univalent chemical radical CH2CH, derived from ethylene. 2. Any of various compounds containing the vinyl radical, typically highly reactive, easily polymerized, and used as basic materials for plastics. 3. Any of various typically tough, flexible, shiny plastics, often used for coverings and clothing. 4. Phonograph records considered as a group: a secondhand store that buys and sells vinyl.
Vinyl here may mean含vinyl之 “布” 料
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This ASTM is for safety, and as far as I know that if a sheet is too thin, it will be dangerous to the infant (盖着口鼻会窒息, 特别是vinyl透气性差?). Therefore, there is a requirement on the minimum thickness of unsupported vinyl, and no requirement for supported vinyl. Unsupported vinyl seems没缝紧的vinyl “布”料。 但行内对这有什么专有名词我就不知道了。
[ From : http://www.google.com/#hl=zh-TW&site=&q=Unsupported+Vinyl%2C+%E7%BF%BB%E8%AF%91&btnK=Google+%E6%90%9C%E5%B0%8B&rlz=1R2ADRA_enHK408&oq=&aq=&aqi=&aql=&gs_sm=&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=3fba751ce05586f0&biw=1097&bih=459 无衬聚氯乙稀薄膜 ? ]
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