US 12,447,654 B2
Foam envelope for sealing large volumes
Eric Huebsch, Medingen (LU); Lars Massueger, Zurich (CH); and Cedric Thomi, Sezenove (CH)
Assigned to DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US); and DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US)
Filed by DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US); and DDP Specialty Electronic Materials US, LLC., Wilmington, DE (US)
Filed on Apr. 17, 2023, as Appl. No. 18/135,300.
Claims priority of provisional application 63/332,789, filed on Apr. 20, 2022.
Prior Publication US 2023/0339153 A1, Oct. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E04B 1/68 (2006.01); B29C 44/18 (2006.01); E06B 1/62 (2006.01); B29K 23/00 (2006.01); B29K 105/04 (2006.01); B29K 105/08 (2006.01); B29L 31/10 (2006.01)
CPC B29C 44/188 (2013.01) [B29C 44/185 (2013.01); E04B 1/6812 (2013.01); E04B 1/6816 (2013.01); E06B 1/62 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29K 2105/04 (2013.01); B29K 2105/0809 (2013.01); B29L 2031/10 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An article (10) comprises a tube (11) having a length (L), a width (W) and a height (H) and at least one thermoplastic pouch (12) having a length (l) and a width (w) inserted within the tube wherein
the tube comprises an upper section (13), a lower section (14), an inner section (15) and an outer section (16),
the tube comprises an inner layer (17) and an outer layer (18), the inner layer (17) being a semipermeable membrane that is permeable to vapors but impermeable to liquids and the outer layer (18) being a nonwoven fabric,
the tube has a through-thickness Gurley air permeability of from 1 to 2,000 seconds,
the tube has a tensile modulus in the L direction of from 300 to 450 MP a and from 200 to 320 MP a in the W direction,
the tube has a plurality of holes that penetrate through the inner (17) and outer (18) layers of the upper section (13) and/or the lower section (14) of the tube,
the pouch length (l) is greater than the width (w),
the pouch is located within the tube contacting the lower (14) and inner (15) sections of the tube and the pouch extends in a direction across the tube width (W) to an extent (Wmax) that is no more than 45% across the tube width (W) and
the pouch (12) contains a foamable composition.