Self-foaming hot melt adhesive compositions and methods of making and using same

The present invention relates to self-foaming hot melt adhesive compositions and methods of making and using the same. Self-foaming hot melt adhesive compositions are formed by admixing a dispersion concentrate including a chemical blowing agent and a compatible carrier (liquid or molten) with a molten base hot melt adhesive composition at a temperature below the decomposition temperature of the chemical blowing agent. The resolidified material is processed through a device that heats the material above the decomposition temperature of the chemical agent and cools it below such temperature before being dispensed. The device preferably includes sensors and a controller configured to prevent the material from accumulating an adverse thermal history during processing. 本发明涉及自发泡热熔粘合剂组合物以及制成并且使用它们的方法。自发泡热熔粘合剂组合物是通过将包括化学发泡剂和相容的载体(液体或熔融的)的分散体浓缩物与熔融的基础热熔粘合剂组合物在低于该化学发泡剂的分解温度的温度下掺合形成的。将再凝固的材料通过装置加工，该装置将该材料加热高于此种化学试剂的分解温度并且在被分配之前使其冷却低于此种温度。该装置优选地包括传感器以及被配置成防止在加工过程中该材料累积不利的热历程的控制器。