▎ 摘　　要

NOVELTY - Sealing rubber strip comprises a supporting layer and a connecting layer, and both comprises 80-100 pts. wt. ethylene propylene diene monomer, 30-50 pts. wt. carbon black, 20-40 pts. wt. paraffin oil, 1-3 pts. wt. vulcanizing agent and 2-3 pts. wt. accelerator. The supporting layer further comprises 3-5 pts. wt. bonding agent A, and the connecting layer further comprises 3-5 pts. wt. bonding agent B, 5-15 pts. wt. foaming agent and 1-2 pts. wt. stearic acid. The binding agent A and the binding agent B both comprises chopped fibers, which includes inorganic fibers and natural fibers in a mass ratio of 1-2: 2-3, the chopped fibers are modified by a modifier, and the modifier comprises maleic anhydride. USE - Sealing rubber strip for door and window. ADVANTAGE - The adhesive tape does not easy to crack and good in sealing effect. The preparation method has uniform and compact foaming. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a strip of a door and window sealant, which involves: weighing the raw materials of the supporting layer according to the formula; mixing ethylene propylene diene monomer rubber, carbon black and an accelerant to prepare a mixture, heating for the first time, adding paraffin oil and a vulcanizing agent into the mixture, mixing to prepare an intermediate, heating for the second time, adding a bonding agent A into the intermediate, and mixing to prepare a supporting layer premix; weighing the raw materials of the connecting layer according to the formula; plasticating ethylene propylene diene monomer, adding carbon black, paraffin oil, an accelerator and 50 wt.% vulcanizing agent into the ethylene propylene diene monomer at one time, mixing to prepare a mixed material, adding a foaming agent, the remaining 50 wt.% vulcanizing agent, stearic acid and a bonding agent B into the mixed material, and continuously mixing to prepare a connecting layer premix; and simultaneously extruding the connecting layer premix and the supporting layer premix, and preparing the adhesive tape by a precooling roller, three-roller press polishing, cooling and trimming.