Breathable and waterproof lining structure for footwear and...

Details Breathable and waterproof lining structure for footwear and... Breathable and waterproof lining structure for footwear and...

2006-04-13

2011-10-18

Gupta, Yogendra (Department: 1744)

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Extrusion molding

C264S495000, C264S142000, C264S045900

Reexamination Certificate

active

08038925

ABSTRACT:
A waterproof and breathable lining structure includes a sheet-like waterproof and breathable foaming cushion layer made of a composition of a predetermined amount of low density polyethylene (LDPE) and a predetermined amount of foaming agent such as azodicarbonamide (ADCA), and a fabric lining layer integrally adhered to one side of the cushion layer to form the lining structure. The cushion layer is made by a process including the steps of: (a) palletizing raw materials including the low density polyethylene and the foaming agent such as Azodicarbonamide (ADCA); (b) extruding the palletized raw material to make a solid sheet; (c) cross-linking the solid sheet by an E-beam to form an irradiated matrix; (d) foaming the irradiated matrix into the sheet-like foaming cushion layer.

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patent: 4435346 (1984-03-01), Ito et al.
patent: 4542164 (1985-09-01), Nishioka et al.
patent: 5708042 (1998-01-01), Hasegawa
“Polymer calendering”, http://www.appropedia.org/Polymer—calendering, accessed Jun. 3, 2010.

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