Airbags including barrier coating and method of manufacture of same
First Claim
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1. An airbag comprising:
- a substrate defining a compartment adapted to receive a gas under pressure; and
a barrier coating arranged on an interior or exterior surface of said fabric substrate, said barrier coating being formed by applying to said surface a solution comprising an elastomeric polymer and a dispersed exfoliated layered.
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Abstract
Airbag having a barrier coating containing substantially dispersed exfoliated layered silicates in an elastomeric polymer. This coating, when dry, results in an elastomeric barrier with an improved permeability characteristics, i.e., a greater increase in the reduction of permeability of the coating. The airbag is optionally made of fabric. Methods for manufacturing airbags with a barrier coating and airbag modules including an airbag with a barrier coating are also disclosed.
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Citations
32 Claims
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1. An airbag comprising:
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a substrate defining a compartment adapted to receive a gas under pressure; and
a barrier coating arranged on an interior or exterior surface of said fabric substrate, said barrier coating being formed by applying to said surface a solution comprising an elastomeric polymer and a dispersed exfoliated layered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of manufacturing an airbag module, comprising the steps of:
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applying to a surface of a substrate a solution comprising an elastomeric polymer and a dispersed exfoliated layered filler and causing the solution to dry to thereby form a barrier coating on the substrate;
forming an airbag having an edge defining an entry opening for enabling the inflation of the airbag from the substrate having the barrier coating formed thereon;
arranging the airbag in a housing;
sealing the edge of the airbag to the housing;
providing a flow communication in the housing to allow inflation fluid to pass through the entry opening into the airbag; and
folding the airbag in the housing. - View Dependent Claims (19, 20)
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21. A method of manufacturing an airbag module, comprising the steps of:
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applying to a surface of a first substrate a solution comprising an elastomeric polymer and a dispersed exfoliated layered filler, covering the solution with a second substrate;
causing the solution to dry to thereby form a barrier coating between the first and second substrates;
forming an airbag from the first and second substrates having the barrier coating therebetween with an edge defining an entry opening for enabling the inflation of the airbag;
arranging the airbag in a housing;
sealing the edge of the airbag to the housing;
providing a flow communication in the housing to allow inflation fluid to pass through the entry opening into the airbag; and
folding the airbag in the housing. - View Dependent Claims (22, 23)
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24. A method for forming a side curtain airbag, comprising the steps of:
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providing a first piece for fabric constituting a front panel of the airbag and a second piece of fabric constituting a rear panel of the airbag;
heat or adhesive sealing the first and second pieces of fabric together over an extended seam width to form an airbag while maintaining an entry opening for passage of inflation fluid into an interior of the airbag;
partitioning the airbag along partition lines into a plurality of chambers each receivable of the inflation fluid; and
determining the location of the partition lines to prevent concentration of stress in the seams. - View Dependent Claims (25, 26)
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27. A method for forming an airbag, comprising the steps of:
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providing a plurality of layers of material;
interweaving, heat sealing or sewing the layers together to form the airbag while maintaining an entry opening for passage of inflation fluid into an interior of the airbag; and
coating the airbag with a barrier coating. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification