Hot-melt adhesive and preparation method therefor

A novel hot-melt adhesive, produced from raw materials of copolyamide, perchloroethylene resin, tackifier, silane coupling agent and plasticizer, which are provided in percentages by mass:

• copolyamide of 63% to 70%;
• perchloroethylene resin of 15% to 20%;
• tackifier of 13% to 17%;
• silane coupling agent of 0.3% to 1%;
• and
• plasticizer of 0.5% to 1%;
• wherein:
• the copolyamide is prepared by performing copolymerization on four main raw materials which include caprolactam, nylon 66 salt, nylon 612 salt and nylon 1010 salt, under actions of proper amounts of water and stearic acid;
• the four main raw materials respectively have percentages by mass of 17.4% to 19.7%, 34.1% to 40.6%, 21.2% to 27.5% and 18.9% to 24.3%;
• and a mole ratio of the stearic acid to the caprolactam is 0.02:1 to 0.03:1,
• wherein a sum total of the percentages of copolyamide, perchloroethylene resin, tackifier, silane coupling agent, and plasticizer is 100%, and a sum total of the percentages of caprolactam, nylon 66 salt, nylon 612 salt and nylon 1010 salt is 100%.