Solution coating film with Nichigo G-Polymer™

By coating substrate with a Nichigo G-Polymer™ aqueous solution, high gas barrier performance can be achieved.

Recommended Grades

4.5 mPa.s

4.5 cc * 3 μm / m2 *day*atm

Standard type, Powder form

3.0 mPa.s

4.5 cc * 3 μm / m2 *day*atm

Low viscosity type, Powder form

The numbers above are sample values, not guaranteed values.

*1: Viscosity of 4% aqueous solution at 20 deg C
*2: Measured at 23 deg C / 65%RH

Recommended coating conditions

  • Solvent: water or water/alcohol (e.g. water/ethanol with ethanol 50wt% or less)
  • Solution concentration: 5-15% (according to coating equipment, desired coat thickness and line speed)
  • Drying temperature: 70-120 degree C

In order to assure adhesion, we recommend the use of substrate film that has undergone corona treatment.

In addition, use of an anchor coating agent is also effective to enhance wetting and adhesion.

Oxygen permeability

Nichigo G-Polymer™ BVE8049Q
23 degree C, PET/resin = 25/3μm

Recommended anchor coating agents

Recommended anchor coat agents

Trade name TITA Bond T-100 DIC DRY AC-108
Manufacturer Nippon Soda CO, Ltd. DIC Graphics Corporation
Main ingredients Polyethylene-imine Polyethylene-imine
Concentration 11 wt% 8 wt%
Solvent Water Methylalcohol
Recommended dilution 1/29 1/29
Dilution solution Water / Ethylalcohol 17 / 83 Water / Alcohol 34.6 / 65.5

Adhesive strength with anchor coat agents

Layer structure of film Delamination section Bonding strength (N/15mm)
Corona treated O-PET / TITA Bond T-100 / Nichigo G-Polymer™ BVE8049Q PET/AC 0.86
Untreated O-PET / TITA Bond T-100 / Nichigo G-Polymer™ BVE8049Q PET/AC 0.07
Corona treated OPP / TITA Bond T-100 / Nichigo G-Polymer™ BVE8049Q PP/AC 0.94

Improvement of Gas Barrier Property at High Humidity

Gas barrier properties are improved by adding layered inorganic additives.

Sample OTR(cc * 3 um / m2 *day*atm)
65%RH 80%RH
Nichigo G-Polymer™ OKS-8118 4-5 100-200
OKS-8118 / Layered inorganic compound = 100/75 0.4 8-10

Layered inorganic additive : Kunipia F (Kunimine Kogyo)
Dry condition : 120 degree C x 10min

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