Taking Grip Seal Bag Production To A New Level!
During the 1960s Flexigrip began to move away from slider-style zippers following Steven Ausnit’s development of a press to close zipper. Not only was this new style more convenient to use, it also reduced material and production costs
Reclosable zipper bags had gained interest but they were still expensive and complicated to make, mainly due to the fact that the zippers had to be heat sealed to the bags, which added time and cost.
This changed when Steven Ausnit learned of a Japanese company, Seisan Nippon Sha, that had incorporated a zipper right into the bag. This cut production costs in half. In 1961, Flexigrip negotiated with Seisan to gain exclusive selling rights in the United States and created a new company called Minigrip to market this format.
Minigrip primarily sold to industrial markets until 1964 when they were approached by Dow Chemical for exclusive rights in the supermarket industry. Dow’s polyethylene resin bags were ideal for Minigrip’s reclosable plastic zippers. After several years of negotiation, the Ziploc® bag was introduced to the consumer market.