Bottle closure assembly including a polyethylene composition

A bottle closure assembly comprising:

• a cap portion, an elongated tether portion, and a retaining means portion, the cap portion being molded to reversibly engage and cover a bottle opening, the retaining means portion being molded to irreversibly engage a bottle neck or an upper portion of a bottle, and the elongated tether portion being molded to connect at least one point on the cap portion to at least one point on the retaining means portion, wherein the cap portion, optionally the elongated tether portion, and optionally the retaining means portion are made from a polyethylene composition comprising:
• (1) 10 to 70 wt. % of a first ethylene copolymer having a melt index I2, of less than 1.0 g/10 min;
• and a density of from 0.920 to 0.960 g/cm3;
• and
• (2) 90 to 30 wt. % of a second ethylene copolymer or an ethylene homopolymer;
• the second ethylene copolymer or the ethylene homopolymer having a melt index I2, of at least 20 g/10 min;
• and a density higher than the density of the first ethylene copolymer, but less than 0.970 g/cm3;
• wherein the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 0.5.

A bottle closure assembly comprising:

• an integrally molded:
• cap portion, tether portion, and retaining means portion;
• the cap portion being molded to reversibly engage and cover a bottle opening, the retaining means portion being molded to irreversibly engage a bottle neck or an upper portion of a bottle, and the tether portion being molded to connect at least one point on the cap portion to at least one point on the retaining means portion;
• wherein the integrally molded:
• cap portion, tether portion, and retaining means portion are made from a polyethylene composition comprising:
• (1) 10 to 70 wt. % of a first ethylene copolymer having a melt index I2, of less than 1.0 g/10 min;
• and a density of from 0.920 to 0.960 g/cm3;
• and
• (2) 90 to 30 wt. % of a second ethylene copolymer or an ethylene homopolymer;
• the second ethylene copolymer or the ethylene homopolymer having a melt index I2, of at least 20 g/10 min;
• and a density higher than the density of the first ethylene copolymer, but less than 0.970 g/cm3;
• wherein the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 0.5.

A bottle closure assembly comprising:

• an integrally molded:
• cap portion, elongated tether portion, and retaining means portion;
• the cap portion being molded to reversibly engage and cover a bottle opening, the retaining means portion being molded to irreversibly engage a bottle neck or an upper portion of a bottle, and the elongated tether portion being molded to connect at least one point on the cap portion to at least one point on the retaining means portion;
• wherein the integrally molded:
• cap portion, elongated tether, portion and retaining means portion are made from a polyethylene composition comprising:
• (1) 10 to 70 wt. % of a first ethylene copolymer having a melt index I2, of less than 1.0 g/10 min;
• and a density of from 0.920 to 0.960 g/cm3;
• and
• (2) 90 to 30 wt. % of a second ethylene copolymer or an ethylene homopolymer;
• the second ethylene copolymer or the ethylene homopolymer having a melt index I2, of at least 20 g/10 min;
• and a density higher than the density of the first ethylene copolymer, but less than 0.970 g/cm3;
• wherein the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 0.5.

A bottle closure assembly comprising:

• an integrally molded:
• cap portion, elongated tether portion, and retaining collar portion;
• the cap portion being molded to reversibly engage and cover a bottle opening, the retaining collar portion being molded to irreversibly engage a bottle neck or an upper portion of a bottle, and the elongated tether portion being molded to connect at least one point on the cap portion to at least one point on the retaining collar portion;
• wherein the integrally molded:
• cap portion, elongated tether portion, and retaining collar portion are made from a polyethylene composition comprising:
• (1) 10 to 70 wt. % of a first ethylene copolymer having a melt index I2, of less than 1.0 g/10 min;
• and a density of from 0.920 to 0.960 g/cm3;
• and
• (2) 90 to 30 wt. % of a second ethylene copolymer or an ethylene homopolymer;
• the second ethylene copolymer or the ethylene homopolymer having a melt index I2, of at least 20 g/10 min;
• and a density higher than the density of the first ethylene copolymer, but less than 0.970 g/cm3;
• wherein the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 0.5.

A bottle closure assembly comprising:

• a closure portion, an elongated tether portion, and a retaining collar portion,
• the closure portion being molded to reversibly engage and cover a bottle opening, the elongated tether portion comprising a tether strip which is frangibly connected along a portion of its upper edge to a descending annular edge of the closure portion and which is frangibly connected along a portion of its lower edge to an upper annular edge of the retaining collar portion, the tether strip being integrally formed with and connected at one end to at least one point on the closure portion and integrally formed with and connected at another end to at least one point on the retaining collar portion, the frangible sections being breakable when the closure portion is removed from a bottle opening, but where the closure portion remains connected to the retaining collar portion via the tether strip;
• wherein the cap portion, the elongated tether portion, and the retaining collar portion are integrally molded from a polyethylene composition comprising:
• (1) 10 to 70 wt. % of a first ethylene copolymer having a melt index I2, of less than 1.0 g/10 min;
• and a density of from 0.920 to 0.960 g/cm3;
• and
• (2) 90 to 30 wt. % of a second ethylene copolymer or an ethylene homopolymer;
• the second ethylene copolymer or the ethylene homopolymer having a melt index I2, of at least 20 g/10 min;
• and a density higher than the density of the first ethylene copolymer, but less than 0.970 g/cm3;
• wherein the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 0.5.