Ziploc - WikiHQ

Ziploc is an American brand of reusable, resealable sliding channel storage bags and containers originally developed and test marketed by the Dow Chemical Company in 1968 and now produced by S. C. Johnson & Son.

The plastic bags and containers come in different sizes for use with different products. The brand offers sandwich bags, snack bags and other bags for various purposes.

History

thumb|left|A Ziploc bag

In 1951, a company called Flexigrip was formed by Romanian Steve Ausnet who purchased rights and set of patents from Dane Borge Madsen who originally developed the plastic zipper. Ausnet then licensed rights from a Japanese company, Seisan Nippon Sha) who had incorporated plastic minigrip type zippers into bags.

The initial products for the Flexigrip and other plastic zippers (such as the sliderless zippers (toptite) were looseleaf binder inserts and flat briefcases. Thereafter, the marketing efforts were directed at packaging products in plastic zipper bags, which turned out to be the principal market for the Flexigrip, Inc. products. From this a company called Minigrip was formed. In 1964 Minigrip (Flexigrip) negotiated exclusive manufacturing and selling rights with Dow Chemical Company for the grocery trade (supermarkets) in the United States. A company by the same name was formed to produce and market Minigrip bags. It turned out to be enormously successful.

thumb|Box of 1 US gallon (3.7 L) Ziploc bags

At that time, plastic bags were being produced in 25 countries at a line speed of 30 feet per minute, but none were being sold to consumers, because they were too expensive to produce. Dow assigned one of their inventors, R. Douglas Behr, to develop a high-speed, efficient process. Having little prior experience in plastics, the task was daunting for Behr, but he surpassed everyone in the world within a year. As he improved the process and increased line speeds to 60, then 90, then 150 and finally 300 feet per minute in 1972, he had to design new equipment. Some were patented and some were kept as trade secrets by Dow. Eventually, other research and production personnel, such as lab technician William Shrum and others, contributed to the process development, but Behr continued to be the leading researcher until he retired in 1993 as a senior associate scientist. At that time the research building was "Dedicated in Recognition of the Distinguished Career of R. Douglas Behr".

In 1978, Minigrip was acquired by Signode, Inc. and became a subsidiary of that company. In 1986, Signode and Dow formed a company, namely Zippak, to develop zipper bags for food products. In 1987, Illinois Tool Works (ITW) acquired Signode, and Minigrip became a subsidiary of ITW. In 1991, ITW acquired Dow's interest in Zip-Pak, making Zip-Pak a fully owned subsidiary of ITW. Zip-Pak produces plastic zippers for the food packaging market. From the time of inception until today, Flexigrip/Minigrip/Zip-Pak/Dow/Dow Brands have obtained over 300 patents for plastic zippers, zipper bags, and methods and machinery of producing the same. In 1997, Dow Chemical sold the rights of DowBrands, which included Ziploc, to S. C. Johnson & Son for between $1.3 and $1.7 billion.

Manufacturing

The manufacturing of Ziploc bags varies among different products. The ordinary Ziploc storage and freezer bag is made from polyethylene plastic.

Competition

Ziploc faces strong competition from such competitors as Glad, Hefty, and many privately owned, generic, store brand plastic bags and containers. As Jules Rose, chairman of Sloan's Supermarkets Inc. in New York City, states: "This is a highly competitive market with a lot of players and unusually strong private label sales." In 1992, Ziploc was faced with sudden competition from the booming sales of arch-rival First Brands Corporation's Glad-Lock bag. Glad Lock bags jumped 13.1% in 12 weeks in the end of 1992, giving Glad-Lock an 18.4% share of the market compared to Ziploc's 43% share.