Caps and closures

A cap or a closure comprising at least one layer comprising an ethylene interpolymer product comprising:

• (I) a first ethylene interpolymer;
• (II) a second ethylene interpolymer;
• and
• (III) optionally a third ethylene interpolymer;
• wherein said first ethylene interpolymer is produced using a single site catalyst formulation comprising a component (i) defined by the formula
• (LA)aM(PI)b(Q)n
• wherein LA is selected from unsubstituted cyclopentadienyl, substituted cyclopentadienyl, unsubstituted indenyl, substituted indenyl, unsubstituted fluorenyl and substituted fluorenyl;
• M is a metal selected from titanium, hafnium and zirconium;
• PI is a phosphinimine ligand;
• Q is independently selected from a hydrogen atom, a halogen atom, a C1-10 hydrocarbyl radical, a C1-10 alkoxy radical and a C5-10 aryl oxide radical;
• wherein each of said hydrocarbyl, alkoxy, and aryl oxide radicals may be unsubstituted or further substituted by a halogen atom, a C1-18 alkyl radical, a C1-8 alkoxy radical, a C6-10 aryl or aryloxy radical, an amido radical which is unsubstituted or substituted by up to two C1-8 alkyl radicals or a phosphido radical which is unsubstituted or substituted by up to two C1-s alkyl radicals;
• wherein a is 1;
• b is 1;
• n is 1 or 2;
• and (a+b+n) is equivalent to the valence of the metal M;
• wherein said second ethylene interpolymer is produced using a first in-line Ziegler-Natta catalyst formulation;
• wherein said third ethylene interpolymer is produced using said first in-line Ziegler-Natta catalyst formulation or a second in-line Ziegler-Natta catalyst formulation;
• wherein said ethylene interpolymer product has a Dilution Index, Yd, having values from ≥−8.57 to ≤−7.41;
• and wherein said ethylene interpolymer product has a melt index from about 0.3 to about 7 dg/min, where the melt index is measured according to ASTM D1238 (2.16 kg load and 190° C.);
• and
• wherein said ethylene interpolymer product has a G′ [@G″=500 Pa] from 80 Pa to 120 Pa.