Container prepared from PCR HDPE resin blend
The invention relates to a container prepared from a PCR HDPE blend comprising PCR HDPE and an effective amount of an impact modifier to provide acceptable ESCR results.
1. A high-content PCR HDPE container comprising:
40 wt % to 70 wt % by weight PCR HDPE based on total weight of the blend: and
30 wt % to 60 wt % by weight of an impact modifier based on total weight of the blend;
wherein the PCR HDPE has a density of 0.95-0.97 g/cm3 and melt flow index of about 1.5 or less;
wherein the impact modifier comprises at least one of:
ULDPE having a density of 0.89-0.92 g/cm3 and a melt flow index of about 1.5 or less, and
an elastomer having a density of 0.87 to 0.91 g/cm3 and a melt flow index of about 1.5 or less; and
wherein the container has a density of 0.90-0.95 g/cm3.
2. The container of claim 1 , comprising about 40 wt % to about 60 wt % by weight of the impact modifier.
3. The container of claim 1 , comprising about 40 wt % to about 60 wt % by weight of the PCR HDPE.
4. The container of claim 1 , wherein the PCR HDPE has a melt flow index of about 1 or less.
5. The container of claim 1 , wherein the impact modifier has a melt flow index of about 1 or less.
6. The container of claim 1 , comprising a mascara container.
7. The container of claim 1 , wherein the PCR HDPE is food-grade FDA LNO.
8. The container of claim 1 , wherein the container is able to withstand an accelerated ESCR test for at least 6 days.
9. The container of claim 1 , wherein the container comprises a tube.
10. The container of claim 9 , wherein the tube has a sleeve thickness of 400 μm or less and a diameter of at least 30 mm.
11. The container of claim 9 , wherein the tube has a sleeve thickness of 350 μm or less and a maximum diameter of 30 mm.
12. A method of making a high-content PCR HDPE container comprising extruding or molding a composition comprising,
40 wt % to 70 wt % by weight PCR HDPE based on total weight of the blend: and
30 wt % to 60 wt % by weight of an impact modifier based on total weight of the blend;
wherein the PCR HDPE has a density of 0.95-0.97 g/cm3 and melt flow index of about 1.5 or less;
wherein the impact modifier comprises at least one of:
ULDPE having a density of 0.89-0.92 g/cm3 and a melt flow index of about 1.5 or less, and
an elastomer having a density of 0.87 to 0.91 g/cm3 and a melt flow index of about 1.5 or less; and
wherein the container has a density of 0.90-0.95 g/cm3.