▎ 摘　　要

NOVELTY - Resin material comprises calcium carbonate inorganic filler, low-density polyethylene substrate and auxiliary agents. The mass ratio of the calcium carbonate inorganic filler and the low-density polyethylene base material is 1-2.5:1. The mass of the auxiliary agent accounts for 5-10 wt.% of the total mass of the calcium carbonate inorganic filler and the low-density polyethylene substrate. The auxiliary agent comprises 20-30 pts. wt. plasticizer, 1.5-4 pts. wt. composite antioxidant, 20-30 pts. wt. lubricant, 5-10 pts. wt. dispersant, and 4-10 pts. wt. coupling agent. USE - The resin material is useful for blowing breathable film (claimed). ADVANTAGE - The method: ensures a high degree of dispersion of resin materials; makes the resin material have better compatibility between the components; uniformly distributes of the components of the resin material; and improves the air permeability and stretch resistance of the air-permeable membrane. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the resin material, comprising (i) adding the calcium carbonate inorganic filler and half of the dispersant to the mixer in turn, adjusting the temperature to 50 degrees C, and stirring at 600 revolutions/minute (rpm) at constant temperature for 10 minutes to obtain a mixed powder, (ii) adding the low-density polyethylene base material and the silane coupling agent to the mixed powder successively under stirring conditions, continuously stirring for 3-5 minutes, adding stearic acid, adjusting the temperature to 90 degrees C, and ultrasonically dispersing for 3 hours to obtain a mixed substrate, (iii) adding the plasticizer, composite antioxidant, lubricant and the other half of the dispersant into the mixer, and stirring at 500 revolutions/minute (rpm) at room temperature for 3 minutes to obtain a mixing aid, (iv) adjusting the temperature of the twin-screw extruder to 120 degrees C, mixing the mixed base material and the first mixing aid, then adding them into the twin-screw extruder, performing melt extrusion, cooling and granulating to obtain a masterbatch, (v) dissolving the polyvinylpyrrolidone/vinyl acetate/vinyl propionate copolymer in water, heating to 200 degrees C at 15 kPa to generate activated steam, then using nitrogen as a carrier to contact the activated steam with the masterbatch adjust adjusting temperature to 700 degrees C, heating for 60 minutes, then stopping the addition of activated steam, and cooling down to room temperature to obtain semi-finished resin products, and (vi) adjusting the temperature of the twin-screw extruder to 120 degrees C, then mixing the semi-finished resin and the second part of the mixing assistant, adding into the twin-screw extruder, and melting and extruding to obtain a resin material.