C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 1/02 (2006.01) B31C 3/00 (2006.01) C09J 7/04 (2006.01)
Patent
CA 2501507
The present invention relates to activatable webs having fibrous substrates coated with activatable adhesive and methods of forming the webs into articles by indirectly activating the adhesive using microwave energy. The activatable web may further include a protective coating of a material that is compatible with the adhesive. One or more activatable webs can be formed into the shape of an article such as by wrapping the activatable webs around a mandrel. The activatable webs can be subjected to microwave energy shortly before being formed into the shape of the article or while they are held in the appropriate shape. The microwave energy is absorbed by moisture retained within the fibrous substrate, which becomes heated. The heated moisture activates the adhesive, causing it to bond to any webs in which the activatable web has been brought into contact and to stiffen.
L'invention concerne des bandes activables comprenant des substrats fibreux recouverts d'un adhésif pouvant être activé, et des procédés permettant de former ces bandes en articles par activation indirecte dudit adhésif à l'aide d'énergie micro-onde. Une bande activable comprend un revêtement protecteur de matériau compatible avec l'adhésif. Une ou plusieurs bande(s) activable(s) sont formée(s) en forme d'article par enroulement desdites bandes autour d'un mandrin. Ces bandes peuvent être soumises à une énergie micro-onde avant d'être mises en forme d'article ou tout en étant maintenues dans une forme appropriée. L'énergie micro-onde est absorbée par l'humidité retenue dans le substrat fibreux qui devient chaud. L'humidité chauffée active l'adhésif, entraîne sa liaison avec des bandes quelconques, la bande activable étant amenée en contact avec lesdites bandes quelconques et durcie.
Floyd Arnold B. Jr.
Lane Gerald L. Jr.
Rhodes David E.
Varadarajan Krishnaraju
Mccarthy Tetrault Llp
Sonoco Development Inc.
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