초록 ▼

A cover pad for an air bag device, a main body of which is molded into a single layer using a resin/elastomer blend. The resin/elastomer blend is made by blending PP with an elastomer in a ratio ranging from 60/40 to 40/60 by weight. The elastomer is made by blending an EPM with a styrene-containing

A cover pad for an air bag device, a main body of which is molded into a single layer using a resin/elastomer blend. The resin/elastomer blend is made by blending PP with an elastomer in a ratio ranging from 60/40 to 40/60 by weight. The elastomer is made by blending an EPM with a styrene-containing thermoplastic elastomer in a ratio ranging from 80/20 to 20/80 by weight. In addition, copolymerization of the EPM produces a propylene content ranging from 21 to 40 mol %; 3 mol %≤P-P≤12 mol %; and 35 mol %≤E-P≤50 mol % (where P-P is the dyad chain configuration (13C-NMR) of the propylene-propylene bond; and E-P is the dyad chain configuration (13C-NMR) of the ethylene-propylene bond).

대표청구항 ▼

A pad for an air bag device comprising: a main body molded into a single layer of a resin/elastomer blend, an opening structure formed in said pad so that an upper wall portion of said main body can be opened by said opening structure upon inflation of an air bag, said resin/elastomer blend comprisi

A pad for an air bag device comprising: a main body molded into a single layer of a resin/elastomer blend, an opening structure formed in said pad so that an upper wall portion of said main body can be opened by said opening structure upon inflation of an air bag, said resin/elastomer blend comprising polypropylene blended with an elastomer in a ratio ranging from 60/40 to 40/60 by weight, said elastomer comprising a blend of an ethylene-propylene random copolymer (EPM) together with a styrene-containing thermoplastic elastomer (TPS) in a ratio ranging from 80/20 to 20/80 by weight, and; said EPM being copolymerized satisfies the following relationship: a propylene content ranging from 21 to 40 mol %; 3 mol %≤P-P≤12 mol %; and 35 mol %≤E-P≤50 mol % (where P-P is a dyad chain configuration (13C-NMR) of propylene-propylene bond; and E-P is a dyad chain configuration (13C-NMR) of ethylene-propylene bond).