Saran

Saran
Name	Saran
Product type	Synthetic polymer film
Current owner	Dow Chemical Company
Country	United States
Introduced	1940s
Markets	Packaging, food storage, industrial

Saran

Saran is a trade name for a class of polyvinylidene chloride-based polymer films originally developed for barrier packaging and preservation. It gained prominence in mid-20th-century industrial chemistry and consumer products and later underwent significant reformulation in response to regulatory and market pressures. Major manufacturers, licensors, and users across the chemical and retail sectors have shaped its technological trajectory and commercial use.

Etymology and name

The trade name was created in the 1940s by scientists and executives at the Dow Chemical Company during commercialization efforts linked to wartime and postwar material research. Naming practice at Dow Chemical Company followed contemporaneous branding strategies used by firms such as DuPont, BASF, and ICI to create distinctive product identities for polymer families like Nylon, Teflon, and Mylar. The Saran brand became associated with barrier-film technology alongside other branded polymers such as Saranwrap (a consumer trademark), Polyethylene, and Polypropylene in retail packaging portfolios maintained by corporations including SC Johnson and Reynolds Consumer Products.

History

Development traces to polymer chemistry research in the 1930s and 1940s performed in industrial laboratories competing with academic groups at institutions like Massachusetts Institute of Technology, University of Michigan, and University of California, Berkeley. Early applications were informed by advances in barrier coatings used by Wright-Patterson Air Force Base and material demands from World War II industries such as aerospace and food supply chains supporting United States Armed Forces. Postwar, the material entered consumer markets via collaboration between Dow Chemical Company and retail brands exemplified by licensing and distribution practices similar to those between 3M and household product lines. Regulatory and environmental developments involving agencies such as the United States Environmental Protection Agency and policy debates paralleling controversies over CFCs and PCBs influenced later reformulation decisions.

Chemical composition and properties

Original formulations were based on polyvinylidene chloride (PVDC), a polymer of vinylidene chloride. PVDC exhibits high barrier properties to oxygen, water vapor, and aroma molecules, comparable in function to materials like EVOH (ethylene vinyl alcohol) and multilayer laminates combining PET and Aluminum foil. The polymer structure imparts chemical resistance akin to chlorinated polymers such as PVC (polyvinyl chloride) and demonstrates thermal behavior that required processing conditions similar to those for polystyrene and polyethylene terephthalate. Barrier performance metrics placed PVDC films in competition with technologies developed at companies including American Can Company and Kraft Foods for packaging life-extension of perishable goods.

Production and manufacturing

Manufacturing historically involved emulsion and suspension polymerization techniques developed in industrial plants operated by Dow Chemical Company and licensees. Conversion to film required extrusion and coextrusion, casting, and oriented film processes practiced in facilities akin to those of Berry Global and Amcor. Coating processes often used adhesive laminates supplied by companies such as Avery Dennison and involved collaborations with converters who served retailers like Walmart and Kroger. Shifts in feedstock availability, raw-material markets influenced by firms such as Occidental Petroleum and commodity trading houses, and capital investments in pilot plants at corporate research centers shaped production capacity.

Uses and applications

Primary uses included food preservation and barrier packaging for products marketed by companies such as Kraft Foods, Nestlé, and General Mills. Industrial applications encompassed protective packaging for electronics produced by IBM and Intel, and barrier films for medical packaging used by firms like Pfizer and Johnson & Johnson. Consumer products included cling film variants retailed under household brands sold through Target and Amazon (company). Specialty applications extended to lamination in photographic and archival materials similar to those supplied by Eastman Kodak and barrier layers in multilayer structures used by Procter & Gamble.

Health, safety, and environmental impact

Concerns emerged over chlorinated polymer degradation products and potential formation of hazards during combustion, paralleling debates over dioxins and chlorinated organics encountered with PVC incineration. Regulatory scrutiny by bodies such as the United States Environmental Protection Agency and international agencies prompted risk assessments comparable to those for bisphenol A and perfluorinated compounds addressed by EPA and European Chemicals Agency. Occupational safety standards referenced guidance from Occupational Safety and Health Administration and industry consortia like the American Chemistry Council. Recycling challenges matched those faced by mixed-film streams managed by Waste Management, Inc. and municipal systems operated by cities such as San Francisco and Tokyo.

Legal and trademark history

The Saran name has been the subject of trademark ownership, licensing, and transfer arrangements involving firms such as Dow Chemical Company, S. C. Johnson & Son (through retail partnerships), and later corporate successors. Litigation and licensing precedents paralleled disputes in intellectual property seen in cases involving DuPont and E.I. du Pont de Nemours and Company over polymer formulations and brand use. Regulatory-driven reformulations produced contractual renegotiations with retailers and suppliers analogous to transitions documented in agreements between Reynolds Consumer Products and packaging licensors.

Category:Polymer brands