PES Resin Copolyester Hot Melt Adhesive For Heat Transfer And Functional Film Production Our PES Resin Copolyester Hot Melt Adhesive is a premium-grade adhesive resin developed for heat transfer printing, lamination, and functional film manufacturing.It is a solid thermoplastic polyester that softens and melts upon heating, offering excellent flow, clarity, and bonding performance. The adhesive ensures reliable adhesion between various substrates such as PET, TPU, nylon, and