Loop material, its manufacture, and its use in products

Details Loop material, its manufacture, and its use in products Loop material, its manufacture, and its use in products

B - Operations, Transporting

32

B

B32B 3/06 (2006.01) A44B 18/00 (2006.01) B05D 3/12 (2006.01) B32B 3/02 (2006.01) B32B 5/14 (2006.01) B32B 27/12 (2006.01) D04H 3/10 (2006.01) D04H 11/08 (2006.01) D06C 3/00 (2006.01)

Patent

CA 2301591

Lightweight, non-woven loop products for hook-and-loop fastening are disclosed, as are methods for making them and end products employing them. The products are non-woven webs of entangled fibers of substantial tenacity, the fibers forming both a sheet-form web body and hook-engageable, free-standing loops extending from the web body. The product is stretched and stabilized to produce spaced-apart loop clusters extending from a very thin web of taut fibers. In important cases a binder is added to stabilize the product in its stretched condition. An example of the loop product is produced by needle- punching a batt of staple fibers in multiple needle-punching operations, applying a foamed acrylic binder, and then stretching the needled batt and curing the binder with the batt stretched. Other forming techniques are disclosed and several novel articles and uses employing such loop products are described, such as for filters and fasteners.

L'invention concerne des produits à bouclettes non tissés légers destinés à une fixation de type auto-agrippant, ainsi que leurs procédés de fabrication et des produits finis à base desdits produits. Les produits sont des bandes non tissées de fibres enchevêtrées sensiblement tenaces, les fibres formant à la fois un élément sous forme de bande et des bouclettes en saillie partant de la bande et s'engageant dans des crochets correspondants. Le produit est étiré et stabilisé pour produire des ensembles de bouclettes séparés partant d'une bande très fine de fibres tendues. Dans les cas importants, on ajoute un fil de liage pour stabiliser le produit dans son état étiré. Un exemple de procédé de fabrication d'un produit à bouclettes consiste à aiguilleter une nappe de fibres coupées lors de plusieurs opérations d'aiguilletage, à appliquer un fil de liage acrylique moussé, puis à étirer la nappe aiguilletée et à durcir le fil de liage avec la nappe étirée. L'invention porte sur d'autres techniques de formage et divers articles et usages nouveaux faisant intervenir de tels produits à bouclettes, notamment les filtres et les dispositifs de fixation.

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