By regulating the content of the polyamide resin and the concentration of the phosphorus compound therein so that {HEAD ~ the value} of the formula 1 falls within {TAIL ~ the range} of 25 or less, the polyester based resin composition having improved gas barrier properties with little darkening due to the deposition of metallic antimony can be obtained 
falls within
By regulating the content of the polyamide resin and the concentration of the phosphorus compound therein so that { HEAD ~ the value } of the formula 1 falls within { TAIL ~ the range } of 25 or less , the polyester based resin composition having improved gas barrier properties with little darkening due to the deposition of metallic antimony can be obtained
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH