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发明公开
CN104154352A 管道 有权

管道
摘要：
本发明提供一种重量轻且消声性优异的管道。本发明的管道(1)由发泡吹塑成形体构成，所述发泡吹塑成形体由弯曲模量为800MPa以上1300MPa以下的聚烯烃类树脂形成，且平均表观密度D为0.1g/cm3以上0.4g/cm3以下，在管道(1)中，发泡吹塑成形体(2)的平均表观密度D与发泡吹塑成形体(2)的平均厚度T自乘得到的值的乘积D×T2为0.005g/cm以上0.04g/cm以下，其中，平均厚度T的单位为cm；表示发泡吹塑成形体(2)的内面侧的平均表观密度D1相对于发泡吹塑成形体(2)的外面侧的平均表观密度D2的比率的值D1/D2小于1。
摘要（英）：

The present invention provides a duct that is light in weight and excellent in sound deadening properties. The duct comprising a foamed blow-molded article constituted of a polyolefin-based resin having a bending elastic modulus of 800 MPa or higher and 1,300 MPa or lower, said foamed blow-molded article having an average apparent density (D) of 0.1 g/cm3 or higher and 0.4 g/cm3 or lower, and an average thickness (T) [cm], wherein the product (D*T2) of the average apparent density (D) and the square of the average thickness (T) of said foamed blow-molded article is 0.005 g/cm or higher and 0.04 g/cm or lower, wherein said foamed blow-molded article has an inner surface side region to having an average apparent density (D1) and an outer surface side region having an average apparent density (D2), and wherein a ratio (D1/D2) of the average apparent density (D1) to the average apparent density (D2) is lower than 1.

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