US 11,938,709 B2
Spout pouch and method of making same
Luis Alberto Santini, Tarragona (ES); Radisa Boskovic, Horgen (CH); Peter Hermann Roland Sandkuehler, Horgen (CH); Ramon Pradas Cortina, Barcelona (ES); Marti Nogué I Arbusa, Barcelona (ES); and Carlos Almor Morujo, Barcelona (ES)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/047,922
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed May 15, 2019, PCT No. PCT/US2019/032392
§ 371(c)(1), (2) Date Oct. 15, 2020,
PCT Pub. No. WO2019/222332, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 18382344 (EP), filed on May 18, 2018.
Prior Publication US 2021/0162728 A1, Jun. 3, 2021
Int. Cl. B32B 37/04 (2006.01); B29C 65/00 (2006.01); B29C 65/02 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 37/18 (2006.01); B65D 47/06 (2006.01)
CPC B32B 37/04 (2013.01) [B29C 65/02 (2013.01); B29C 66/723 (2013.01); B32B 27/08 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 37/185 (2013.01); B65D 47/06 (2013.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2307/30 (2013.01); B32B 2307/518 (2013.01); B32B 2307/72 (2013.01); B32B 2323/043 (2013.01); B32B 2323/046 (2013.01); B32B 2323/10 (2013.01); B32B 2329/04 (2013.01); B32B 2377/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A process for making a package comprising a spout, the process comprising:
(a) heating a sealing area of a spout to a temperature at or above a melting point of the spout material;
(b) heating two multilayer structures around a portion of their peripheries to adhere the peripheries of sealant layers to each other and form a partially sealed package having an opening, wherein each multilayer structure comprises a multilayer film, the multilayer film comprising:
the sealant layer having at least 40% by weight of a first ethylene-based polymer having a melting point below 112° C., a melt index (I2) from 0.5 to 8 g/10 mins as determined by ASTM D1238 (190° C., 2.16 kg), and a density between 0.880 and 0.918 g/cm3;
an external layer comprising a second ethylene-based polymer;
at least one intermediate layer disposed between the sealant layer and the external layer and having a melting point at least 15° C. higher than the sealant layer, wherein the intermediate layer comprises: a third ethylene-based polymer having a density above 0.920 g/cm3, and a melt index (I2) from 0.25 to 5 g/10 mins; a propylene based polymer; or mixtures of the third ethylene-based polymer and the propylene based polymer; and
(c) inserting at least a portion of the heated spout into the opening; and
(d) pressing opposing surfaces of the two multilayer structures around the spout to close the opening around the spout.