酒店毛巾的针密度合格标准主要取决于纱支密度，具体如下：

　　The qualified standard for needle density of hotel towels mainly depends on the yarn count density, as follows:

　　常见纱支范围

　　Common yarn count range

　　酒店毛巾通常采用16S、21S、32S等低纱支密度，这类毛巾以轻便、吸水性为主，适合高频使用场景。

　　Hotel towels usually use low yarn count densities such as 16S, 21S, 32S, etc. These towels are mainly lightweight and absorbent, suitable for high-frequency use scenarios.

　　纱支密度定义

　　Definition of yarn count density

　　纱支密度指每平方英寸织物中经纱与纬纱的根数总和。例如，300T床品表示经纱173支、纬纱120支，两者之和约300S。

　　Yarn count density refers to the total number of warp and weft yarns per square inch of fabric. For example, a 300T bedding represents 173 warp yarns and 120 weft yarns, totaling approximately 300S.

　　合格标准参考

　　Qualified standard reference

　　虽然搜索结果未明确标注“合格针密度”的具体数值，但根据行业常规：

　　Although the specific value of "qualified needle density" is not clearly marked in the search results, according to industry norms:

　　毛巾类纱支一般不低于16S，确保基本吸水性和耐用性；

　　Towel yarn count is generally not less than 16S, ensuring basic water absorption and durability;

　　高端酒店可能采用更高纱支（如32S），以提升触感品质。

　　High end hotels may use higher yarn count (such as 32S) to enhance tactile quality.

　　总结 ：酒店毛巾合格标准主要通过纱支密度控制，常见为16S及以上，具体需结合实际使用需求和酒店档次确定。

　　Summary: The qualification standard for hotel towels is mainly controlled by the yarn count density, which is commonly 16S or above. The specific requirements need to be determined based on actual usage needs and hotel grade.

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　　This article is a friendly contribution from the hotel linen For more related knowledge, please click http://www.jnadx.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.