초록 ▼

In the production of a strand-form hotmelt adhesive wrapped in a tubular film which is suitable for simultaneous melting with the hotmelt adhesive and which does not have any surface tackiness at normal storage temperatures, the heated liquid hotmelt adhesive is introduced into the cooled tubular fi

In the production of a strand-form hotmelt adhesive wrapped in a tubular film which is suitable for simultaneous melting with the hotmelt adhesive and which does not have any surface tackiness at normal storage temperatures, the heated liquid hotmelt adhesive is introduced into the cooled tubular film and the tube is subsequently cooled in a cooling bath. During introduction of the hotmelt adhesive, the shape of the tubular film is stabilized by providing an excess gas pressure and/or a guide inside the tube. The outside of the tube is cooled by a cooling liquid, the tubular film is brought into a substantially horizontal position after immersion in the cooling bath and is kept in that position in the cooling bath at least until the contents of the tubular film in proximity with said liquid hotmelt adhesive have at least partly solidified. Strands of any diameter and any length can readily be produced without significant effort in an economically and industrially useful manner.

대표청구항 ▼

[ What is claimed is:] [1.] A process for the production of a strand-form hotmelt adhesive comprising:(a) introducing liquid hotmelt adhesive into a tubular film, which tubular film is suitable for melting together with the hotmelt adhesive and which is not tacky at normal storage temperatures, to f

[ What is claimed is:] [1.] A process for the production of a strand-form hotmelt adhesive comprising:(a) introducing liquid hotmelt adhesive into a tubular film, which tubular film is suitable for melting together with the hotmelt adhesive and which is not tacky at normal storage temperatures, to fill a portion of said tubular film with said liquid hotmelt adhesive;(b) cooling the outside of said tubular film by contact with a flowing cooling liquid in proximity to the point where said liquid hotmelt adhesive is introduced into said tubular film, whereby said tubular film is cooled while said liquid hotmelt adhesive is being introduced into said tubular film;(c) providing at least one member selected from the group, consisting of excess gas pressure and a guide inside said tubular film to stabilize the shape of said tubular film while said hotmelt adhesive is introduced into said tubular film;(d) immersing said portion of said tubular film in a cooling bath after filling said portion of said tubular film with said hotmelt adhesive, to cool said hotmelt adhesive.