Existing barrier polymers including EVOH, MXD6, PVA, etc., have been enlarged the applications and market by useful characteristics respectively. But, high price and own weaknesses limit their usage. Many customers who want to overcome the existing field need new barrier materials. POKETONE itself has good barrier property because of unique chemical structure and OTR is 10~100 times higher than EVOH as film or sheet.
Hyosung discovered that the blend of PK and high flow EVOH showed extremely high barrier property compared with existing materials. And, finally announced the ternary blend including EAA(Ethylene Acrylic Acid) is the most balanced formulation(POKAL), and could replace the existing polymers. POKAL’s extremely low OTR will be applied to much thinner thickness and cost-competitive product.
POKAL formulation’s optimal ratio is 30~48% of POKETONE M710F, 65~48% of high flow EVOH and about 5% of EAA. And we propose pellet blending before production for reducing melt degradation. POKETONE itself can be used for a container of fuel and oils, because of excellent barrier property and low swell. The producer can up-grade his products by selecting POKETONE.
Aliphatic Polyketone Terpolymer: New ENPLA
Poketone’s possibility for barrier polymer
O2 barrier property of Poketone
Other Polymers
PK Film, Sheet thickness (㎛)
Fig. O2 Permeability (STD 20㎛) by thickness of Polyketone
■ Proposal for barrier packaging material to replace EVOH.
▪ Poketone : EVOH : Nucrel 31001(or Primacor 1410) = 29 : 68 : 3
(Recommended Blend Ratio EVOH : M710F ~ 7 : 3 (PK ≤ 30%)
– Poketone; M710F(Low Tm Grade)
– EVOH; Higher melt flow grade is better than low melt flow
– When optimized condition, the Poketone content of Pokal formulaton could be 30~60%.
▪ Dry blend
▪ Same Extrusion Condition as EVOH
– N2 purging to extruder is the very helpful way to reduce the oxidation of POKAL during
processing.
■ Tie-resin for Pokal is same as EVOH.
Polymer blend’s barrier theory
Adding EAA(Nucrel) helps
– Miscibility of EVOH & PK M710F itself
– Increasing peel strength
Recommended EAA dosing is about 3-5%
Gasoline Barrier
CE10(Ethanol contained gasoline) Barrier
Fuel C = Toluene 50% + Isooctane 50%
(equivalent to gasoline)
CE10 = Fuel C 90% + Ethanol 10%
Fuel C = Toluene 50% + Isooctane 50%
(equivalent to gasoline)
CM15 = Fuel C 85% + methanol 15%
Phone Number
Email Address
Office Address
