MHPⅡ

What is MHPII (Micro-Hole Pack II)?

Features of MHPII

・

Ultra-micro holes block entry by foreign matter, such as insects or dust.

・

The task of filling rice bags work can be carried out using existing equipment, with no new degassing equipment etc. needed.

Water penetration comparison testing for MHPII

[Drip testing]

Method
We prepared several 5 kg rice bags (of polished white rice), including MHPII-specified rice bags and conventional rice bags.
We conducted a comparison of mold generated under controlled conditions. A certain amount of water was dripped onto both bags from above, and then the bags were left for two weeks at an indoor temperature of 30°C and 90% humidity, after which the amount of mold was measured.

Results

A clear difference was confirmed. No mold was observed in the MHPII-specified rice bag, while it was confirmed that mold had occurred in the conventional (perforated) rice bags, as shown in the photograph.

[Airflow testing]

Method
We prepared several 5 kg rice bags (of polished white rice), including MHPII-specified rice bags and conventional rice bags.
After the bags were left for two weeks at an indoor temperature of 30°C and 90% humidity, the amount of moisture within each bag was measured.

Results

	Moisture content after 1 week (%)	Moisture content after 2 weeks (%)
MHPII laminate bag	13.45	15.80
MHPII PE bag	13.45	15.21
Conventional product (perforated bag)	13.45	19.90

There was a noticeable difference between the MMHPII-specified bags and the conventional product (perforated bags).

The above measurements were conducted at the Material Application Support Center within the Industrial Research Institute of Niigata Prefecture.