| 摘要 |
Wrapping films capable of forming peelable seals, comprising by weight 20 to 80% of heat-sealable rigid polymers (A) which, in film form, have an elasticity modulus in excess of 3000 kg/cm2, measured according to the ASTM D 88227 standards; 0.1 to 50% of non-heat-sealable polymers (B) which do not form a solution with polymer (A); 0.1 to 30% of heat-sealable branched olefinic polymers (C) which, in film form, have an elasticity modulus below 3000 kg/cm2, measured according to the ASTM D 88227 standard; and 0 to 45% of polymers (D) compatible with polymers (A), (B) and (C), the sum of the polymers (A), (B), (C) and (D) representing 100% of the polymer material of the film, to which up to 45% of additives (E) and/or up to 10% of adjuvants (F) conventional for wrapping films may be added and process for the preparation thereof. |
