The present invention provides a polyamide resin composition having excellent low-temperature impact resistance and surface property, a polyamide resin composition for rotational molding and a rotational molded article using the same. The polyamide resin composition according to the present invention comprises: a component (A) in an amount of a parts by weight, which is an aliphatic polyamide having a relative viscosity ηr of less than 2.6 as measured according to JIS K6920 under the conditions of 96 wt% of sulfuric acid, 1 wt% of the polymer concentration, and 25°C; a component (B) in an amount of b parts by weight, which is a modified polyolefin having a density of 0.895 g/cm3 or less as measured according to ASTM D1505; and a component (C) in an amount of c parts by weight, which is a non-modified polyolefin having an MFR value of 3.0 to 30 g/10min as measured in a load of 2.16 kg at 190°C; wherein the polyamide resin composition satisfies the following equations: 50 ≤ c/(b+c)×100 ≤ 70, and 10 ≤ (b+c)/(a+b+c)×100 ≤ 40.
本发明提供了一种具有优异的低温抗冲击性和表面性能的聚酰胺
树脂组合物、一种用于滚塑成型的聚酰胺
树脂组合物和一种使用该组合物的滚塑成型品。根据本发明的聚酰胺
树脂组合物包括:a 组分(重量份),它是脂肪族聚酰胺,在 96 wt%的
硫酸、1 wt%的聚合物浓度和 25°C 的条件下,根据 JIS K6920 测量,其相对粘度 ηr 小于 2.6;b 组分(重量份),它是改性聚烯烃,密度为 0.根据 ASTM D1505 测量,其密度为 0.895 g/cm3 或更低;以及组分(C),其重量份数为 c 份,其为非改性聚烯烃,在 190°C、2.16 kg 的负载下测量,其 MFR 值为 3.0 至 30 g/10min;其中聚酰胺
树脂组合物满足以下公式:50≤c/(b+c)×100≤70,10≤(b+c)/(a+b+c)×100≤40。