Low fluid permeation rubber hose
View Patent ↗Low or near zero fluid permeation hose for petroleum and other chemical transfer applications. The hose includes an inner tube formed of a vulcanized rubber, and a barrier layer of a strip of a fluoropolymer of other polymeric material resistant to fluid permeation. The strip is spiral wound about the longitudinal axis of the hose.
1. A low fluid permeation hose, the hose extending lengthwise along a longitudinal axis and comprising:
an inner tube formed of a vulcanized rubber;
a first barrier layer comprising a first strip of a first polymeric material having a pair of edges defining a widthwise extent of the first strip therebetween, the first strip being spiral wound about the longitudinal axis with each edge of the first strip being spaced-apart from the next adjacent edge; and
a sealing strip spiral formed of a vulcanized rubber wound about the longitudinal axis on the first strip, the sealing strip having a widthwise extent overlapping each edge of the first strip and the next adjacent edge thereof.
2. The hose of claim 1 wherein the first polymeric material is a thermoplastic.
3. The hose of claim 1 wherein the first polymeric material is a fluoropolymer.
4. The hose of claim 1 wherein the first polymeric material is selected from the group consisting of polytetraflurorethylenes (PTFE), fluorinated ethylene propylenes (FEP), and copolymers, blends, and combinations thereof.
5. The hose of claim 1 wherein the first strip is a film having a thickness of between about 1-10 mil.
6. The hose of claim 1 wherein:
the first strip has a pair of edges defining a widthwise extent of the first strip therebetween; and
each edge of the first strip is overlapped by the next adjacent edge.
7. The hose of claim 1 wherein the vulcanized rubber forming the sealing strip is a fluororubber.
8. The hose of claim 1 wherein the barrier layer is the outermost layer of the hose.
9. The hose of claim 1 wherein the barrier layer is the innermost layer of the hose.
10. The hose of claim 1 further comprising a second barrier layer, the second barrier layer comprising a second strip of a second polymeric material spiral wound about the longitudinal axis.
11. The hose of claim 10 wherein the second polymeric material is a fluoropolymer.