Low moisture permeability laminate construction

Low moisture permeability laminate construction

  • CN 101,541,530 B
  • Filed: 10/26/2006
  • Issued: 09/09/2015
  • Est. Priority Date: 10/26/2006
  • Status: Active Grant
First Claim
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1. pneumatic tire, comprises cover tire surface layer, intermediate sidewall and casing ply and penetralia air permeation prevention layer:

  • I () described air permeation prevention layer has upper surface and lower surface, described layer comprises and to have at 30 DEG C 25 ×

    10 -12cccm/cm 2the polymer composition of the air permeability coefficient of sec cmHg or lower and the Young'"'"'s modulus of 1MPa-500MPa, described polymer composition comprises;

    (A) based on the gross weight of this polymer composition, at least 10wt% at least one to have at 30 DEG C 25 ×

    10 -12cccm/cm 2the thermoplastic resin component of the air permeability coefficient of sec cmHg or lower and the Young'"'"'s modulus higher than 500MPa, this resin Composition is selected from polyamide, mylar, polynitrile resins, polymethacrylate resin, polyvinyl resin, celluosic resin, fluorine resin and imide resin, and (B) based on the gross weight of described polymer composition, at least 10wt% at least one has at 30 DEG C higher than 25 ×

    10 -12cccm/cm 2the air permeability coefficient of sec cmHg and be no more than the elastomeric component of Young'"'"'s modulus of 500MPa, this elastomeric component is selected from diene rubber and its hydride, halogen-containing rubber, silicone rubber, containing sulphur rubber, fluorubber, hydrin rubber, acrylic rubber, ionomer and thermoplastic elastomer (TPE), total amount (A)+(B) of component (A) and component (B) is at least 30wt%, based on the gross weight of described polymer composition, wherein said elastomeric component (B) is dispersed in the matrix of the thermoplastic resin component (A) in described polymer composition using sulfided state as discontinuous phase, with (ii) with the described lower surface of at least described air permeation prevention layer be at least one thermoplastic layer of layered relationship, described thermoplastic layer comprises film forming, hypocrystalline hydrophobic carbon chain polymer and this polymer that glass transition temperature Tg is less than-20 DEG C and has the equilibrium water content under 100% relative humidity being less than 0.1g/100g polymer or the molar water content/constitutional unit being less than 0.1;

    With(iii) at least one casing ply comprises high diene rubbers.

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