We want to come up with a more space-efficient storage method for powders that will be used in dietary supplements. Are paper sacks with a removable inner liner (I believe it's called a "dairy block bag") acceptable for storing powders? For general storage, we would store the powder in the sack using the plastic liner. However, if we need to send powders to heat-treatment, we would remove the inner plastic liner (because the plastic liner would melt somewhat, which is a risk to the powder) and send the powder to treatment in the paper sack, e.g., stitched shut.
We are evaluating the plastic sack with removable inner liner as a proposal put forth from our purchasing.
We manufacture dietary supplements in the United States under 21 CFR Part 111 and are SQF Edition 9 certified.