Specifications

The Patent Office Journal 17/12/2010
4463
(12) PATENT APPLICATION PUBLICATION (21) Application No.1188/DEL/2009 A
(19) INDIA
(22) Date of filing of Application :10/06/2009 (43) Publication Date : 17/12/2010
(54) Title of the invention : MULTILAYER FILM FOR FLEXIBLE PACKAGING
(51) International classification :C09J
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
Filing Date
:NA
:NA
(87) International Publication No :NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
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(71)Name of Applicant :
1)BOSTIK S.A
Address of Applicant :12, PLACE DE L'IRIS, 92400
COURBEVOIE, France
(72)Name of Inventor :
1)ROBERT, CHRISTOPHE
2)CHARTREL, JEAN-FRANCOIS
(57) Abstract :
The present invention provides for Multilayer filmcomprising 2 thin layers joined by a layer, having a thickness of less than 10 um, of
an adhesive composition comprising: from 30 to 70% of a blend of styrene block copolymers consisting of 5 to 75% of a triblock
copolymer chosen from the group comprising SIS, SIBS, SBS, SEBS and SEPS; and 25 to 95% of a diblock copolymer chosen from
the group comprising SI, SBI, SIB, SB, SEB, SEP, the overall content of styrene units of said blend being between 10 and 40%; and
from 30 to 70% of one or more tackifying resins. The invention further provides for a method of preparing said film comprising a step
of coating a first thin layer of material with the adhesive composition, in which said composition, rendered flowable by heating at an
appropriate temperature, is extruded by a coating device without contact with said thin layer, in the form of a substantially continuous
layer, which is then brought into contact with the surface of said thin layer.
No. of Pages : 34 No. of Claims : 17