Packaging methods and packaging materials for fine powders

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 33/00 (2006.01) B29C 59/02 (2006.01) B29C 65/02 (2006.01)

Patent

CA 2567689

A method for treating a package. In the method a first plastic film sack (14) is provided, that has a flexible wall (18) comprising a plastic film (3), the wall (18) having an outer surface (5). A second plastic film sack is provided. A product of powder form is provided that has an upper size limit which is the particle size smaller than 1 mass-percent of the particles of the product of powder form, which upper size limit is at most 5000 microns and a lower size limit which is the particle size bigger than 1 mass-percent of the particles of the product of powder form. The product of powder form is packed in the first plastic film sack (14), and the first plastic film sack is, at least partly, placed upon the second plastic film sack. According to the invention, such a first plastic film sack is provided in which at least a part of the outer surface (5) of the flexible wall (18), the roughened surface-part (6), comprises antislip protrusions (7) which antislip protrusions (7) are constituted by roughening particles, of polymer material, fixed to the outer surface (5) and the height (8), above the outer surface (5) of the plastic film wall, of at least a part of the antislip protrusions (7) is bigger than the lower size limit of the product of powder form.

La présente invention se rapporte à un procédé permettant de traiter un emballage. Le procédé selon l'invention consiste : à fournir un premier sachet en film plastique (14), qui comporte une paroi souple (18) constitué d'un film plastique (3), ladite paroi (18) possédant une surface externe (5) ; à fournir un second sachet en film plastique ; à fournir un produit sous forme pulvérulente, qui est doté d'une limite de taille supérieure, qui correspond à la taille de particule inférieure à 1 % masse des particules du produit sous forme pulvérulente, ladite limite de taille supérieure étant inférieure ou égale à 5000 micromètres, et une limite de taille inférieure, qui correspond à la taille de particule supérieure à 1 % masse des particules du produit sous forme pulvérulente. Le produit sous forme pulvérulente est emballé dans le premier sachet en film plastique (14), lequel est au moins partiellement placé par-dessus le second sachet en film plastique. L'invention a également trait à un tel premier sachet en film plastique, dont la paroi souple (18) comporte, sur au moins une partie de la surface externe (5), qui est la partie à surface rugueuse (6), des saillies antidérapantes (7), lesquelles sont constituées de particules rugueuses d'une matière polymère fixées sur la surface externe (5), et la hauteur (8) d'au moins une partie des saillies antidérapantes (7), au-dessus de la surface externe (5) de la paroi de film plastique, est supérieure à la limite de taille inférieure du produit sous forme pulvérulente.

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