Expandable Bladder
AssigneePirelli Pneumatici S.p.A.
InventorsNanni Marco Nahmias, Massimo Loprevite, Roberta Bongiovanni, Anna Di Gianni, Aldo Priola
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Abstract
An expandable bladder for manufacturing pneumatic tyres is used in combination with a vulcanisation apparatus including, for example, a mould having a plurality of sidewall plates and tread sectors that, when the mould is closed, delimit a moulding cavity suitable for housing the green pneumatic tyre to be cured. The expandable bladder includes an elastomeric material obtained by curing an elastomeric composition which includes at least one butyl rubber and at least one compound having at least one double bond and an at least partially fluorinated alkyl or polyoxyalkylene chain.
Claims31
1-30. (canceled)
An expandable bladder for manufacturing pneumatic tyres, comprising an elastomeric material obtained by curing an elastomeric composition comprising at least one butyl rubber and at least one compound having at least one double bond and an at least partially fluorinated alkyl or polyoxyalkylene chain.
A curable elastomeric composition comprising at least one curable rubber and at least one compound having at least one double bond and an at least partially fluorinated alkyl or polyoxyalkylene chain.
A process for manufacturing a pneumatic tyre, comprising the steps of
- forming a crude tyre;
- inserting the crude tyre in a vulcanisation mould;
- and
- inserting an expandable bladder into the crude tyre;
- wherein said expandable bladder comprises an elastomeric material obtained by curing an elastomeric composition comprising at least one butyl rubber and at least one compound having at least one double bond and an at least partially fluorinated alkyl or polyoxyalkylene chain.
Dependencies are inferred from the claim text.