RESIN COMPOSITION, MOLDED ARTICLE, LAMINATE AND LAMINATED TUBE

The present invention relates to a resin composition containing: 40-90 mass% of a biomass-derived polyolefin (A) obtained by polymerizing a monomer component mainly composed of biomass-derived ethylene (x); 25 to 50 mass% of a linear low density polyethylene (B) having a density of 0.90 to 0.93 g/cm3; and 1-10 mass% of a modified polyolefin (C), where the total of (A), (B), and (C) is taken as 100 mass%, the biomass degree Pbio of the polyolefin (A) is 90% or more, the biomass degree Pbio of the resin composition is 50% or more, Pbio (%) = pMC/105.5 * 100, and pMC represents the content of radioactive carbon 14C in the polyolefin (A) or the resin composition as determined in accordance with ASTM D6866. 本发明涉及一种树脂组合物、包含该树脂组合物的成型体和叠层体以及包含该叠层体的叠层管，其中，该树脂组合物含有：使以源于生物质的乙烯(x)为主的单体成分聚合而成的源于生物质的聚烯烃(A)40～90质量％；密度为0.90～0.93g/cm3的线性低密度聚乙烯(B)25～50质量％；和改性聚烯烃(C)1～10质量％，其中，将上述(A)、上述(B)和上述(C)的合计设为100质量％，上述聚烯烃(A)的生物质度Pbio为90％以上，树脂组合物的生物质度Pbio为50％以上，Pbio(％)＝pMC/105.5×100，式中，pMC表示按照ASTM D6866求出的聚烯烃(A)或树脂组合物中的放射性碳14C的含量。