Heat activated adhesives for bag closures

A polymeric woven bag, comprising:

• a polymeric outer layer;
• an inner polymeric woven bag layer laminated to or adhesively adhered to the outer layer;
• a first panel and a second panel and an open end of the bag to be pinched closed between the first panel and the second panel after filling the bag with contents, and wherein the bag is foldable along a fold line;
• an adhesive layer on a portion of the first panel below the fold line to form an adhesive-to-adhesive seal by contact with a further adhesive layer on a portion of the second panel above the fold line, wherein the first adhesive layer and the further adhesive layer are dry and impervious to water, and are separate from each other while the bag end is open for filling the bag with contents, and wherein the adhesive layer and the further adhesive layer are heat activatable to adhesive states at a temperature below the softening point temperature of the polymeric material, while in contact with each other and while the bag is folded, to form the adhesive-to-adhesive seal;
• and
• the adhesive layer and the further adhesive layer respectively comprise:
• (a) ionomer dispersions in water, based upon poly (ethylene-co-methacrylic acid) (EMAA);
• or
• (b) aqueous based dispersions or emulsions including water, acrylic polymer, polyester polyurethane resin, formaldehyde, ammonium hydroxide, alumina and further including ammonia as a combustion product.