August 1994
Metro
Solid Waste Department
600 NE Grand Ave.
Portland, OR 97232-2736
(503) 797-1650
Fax (503) 797-1795
Plastics continue to be recycled at a relatively low rate compared to other materials. Generation of waste plastics declined slightly in the Metro area in 1993 and recycling remained essentially unchanged compared to 1992.
Consumers and businesses continue to want to recycle plastics, but opportunities to do so have been constrained due to underdeveloped secondary markets and recovery infrastructure. Approximately 9,941 of the 86,255 calls Metro's Recycling Information Center received between July 1993 and June 1994 were about plastics.
Spurred by the convergence of numerous development efforts and the upturn in the general economy, significant plastic recycling collection and market developments occurred in the Pacific Northwest, nationally and internationally during 1993 and the first half of 1994.
Graphic: U.S. Resin Consumption Forecast (in billions of pounds) (1991-1996), "Plastics News," December 20, 1993.
Major Generators:
Estimated Recovery: 6,721 tons of all resin types combined = 7 percent of waste plastics generated.[2]
Handlers/Processors/Manufacturers: See table on pg 4 of source document
Origin of Recovered Material: Oregon and Washington[3]
Secondary Uses:
Factors Affecting Markets and Recovery:
Outlook: Improving
As Table 1 (on page 4 of source document) shows, the majority of plastics recyclers in the Metro area handle HDPE, while a smaller number handle other resins. Most of these recycling businesses are collectors and intermediate processors, meaning they prepare recovered plastics for processing into manufacturing feedstocks. Five companies in the Metro area produce and/or use recovered plastic feedstock, most of which comes from the Metro area. Three of these utilize HDPE; one utilizes polystyrene; two utilize polypropylene; three utilize LDPE and one utilizes PVC. HDPE milk jugs account for 62 percent of all HDPE recycled in the Metro area.[10]
Nearly half of all milk jugs recycled are recovered through curbside collection programs. Curbside collection of milk jugs has been increasing rapidly since Metro began tracking it in 1991. The balance of milk jugs recycled are delivered by commercial haulers and self-haulers to buy back centers and depots. KB Recycling is the main outlet for milk jugs recovered in the Metro area. Most other HDPE recycled comes from businesses. Denton Plastics in Portland recycles most of this material.
Graphic: Metro-area Post-Consumer Plastic Recycling and Disposal by Resin Type [(See source document.)]Table 1: West Coast Companies Handling Post-Consumer Plastics (excludes collectors outside Metro area) [(See source document.)]
Graphic: Metro-area Milk Jug Recycling by Source (1991-93) [(See source document.)]
According to Metro's Recycling Levels Survey, Thriftway's popular "2-4-6" program collected about six percent of all milk jugs recycled in the Metro area in 1993, 8.5 percent of all HDPE recycled, 18 percent of all LDPE recycled, and 30 percent of all polystyrene. In July 1994, Thriftway began collecting all plastic containers (#1-7). Partek in Vancouver receives the Thriftway material.
The vast majority of PET recycled in the Metro area is collected by Container Recovery Inc. (CRInc) from retail grocery stores through the "Bottle Bill." Most of this material is shipped to South Carolina for recycling.
The Plastic Recovery Facility (PRF), slated to begin operating at the Garten Foundation in Salem before the end of 1994, will increase the capacity of the plastic processing system serving the Metro region. It will also change the quantity and flow of recovered plastics through the local recycling system. With the exception of milk jugs and "Bottle Bill" PET, most rigid plastic containers made with PET, HDPE, PVC, PP and PS will flow to the PRF for sorting. The PRF will then market some of this sorted material to processors in the Metro area, such as Denton and Partek, and some to processors in other states and offshore, depending on the type of resin and market conditions.
Most of the bottle bill PET collected in the Metro area is marketed in baled or ground form to Wellman Industries in Johnsonville, South Carolina, where it is reclaimed and used in fiber applications such as carpeting, sleeping bags, ski jackets and pillows. This resin also is used in the Pacific Northwest to make new soft drink bottles and futon mattresses. Markets for Oregon PET also exist in the midwestern, eastern and southern United States.
HDPE resin is manufactured in several forms, each of which can be used for different applications. Recovered milk jugs, the most commonly recycled HDPE product in the Metro area, are recycled in the Northwest into a range of non-food and plastic products such as detergent bottles, flower pots, sign posts, shipping containers, grocery bags and garbage cans. In spite of these in-region markets, a significant portion of the milk jugs recovered in Oregon in 1993 were exported to Canada and Asia for recycling.
Most of the polystyrene recovered in Oregon is shipped to the National Polystyrene Recycling Company in California that processes it for sale to manufacturers of wall and building insulation, protective foam packaging, office products, videotape cassette cases, egg cartons, decorative and architectural concrete, fast food "clamshells" and hard food trays. A small amount of this material is used in-region to make promotional products such as visors and yo-yos.
Table: Plastic Coding, Characteristics and Applications [(See source document.)]Graphic: National Pricing History (cents per pound)--HDPE, PET, LDPE [(See source document.)]
Graphic: National Pricing History (cents per pound)--PS, Polypropylene, PVC [(See source document.)]
Reclaimed PVC is used to make non-food containers and the middle layer of a multi-layer food bottle. It is also used to make drainage pipes and other construction materials.
LDPE is used to make bags and wrapping film. It is also used in plastic lumber. A significant amount of this material is exported to Canada and Asia for recycling.
Polypropylene containers are being recycled in-state into flower pots and other nursery products. This materials also can be used to make other kinds of containers, as well as car battery casings and other consumer products.
Selected, mixed plastics are being used in-state to manufacture plastic lumber and other durable products, including park benches, picnic tables, decking and pilings. The PRF will sort mixed plastics into single-resin streams for enhanced marketability. Purchase orders for loads of mixed plastic containers are in place and increasing.
Plastic processing involves sorting, grinding and cleaning recovered plastics and remelting them into feedstock-grade pellets or flakes that can be chemically or thermally reformed into a wide variety of new products. Plastic product manufacturing is highly sensitive to contaminants commonly found in unprocessed recovered plastics.
Recovered plastics with minimal contamination typically costs less to process and market than poor quality recovered plastics. Although several plastics are collected source-separated in Oregon, contamination of recovered plastics, especially from residential sources, is common. Contamination tends to occur in two forms:
Machines have been developed in recent years to sort recovered plastics automatically, thus decreasing the need for costly manual sorting to ensure quality control. This new technology is beginning to be used more widely in the plastic recycling industry. It will be applied at the new PRF in Salem to reduce processing costs and increase feedstock quality, particularly for rigid plastic containers such as those commonly generated by households.
Plastic products vary greatly in value, from simple forms to sophisticated engineered plastics used in computers, cars and medical equipment. Plastic has some unique performance characteristics that limit the degree to which it competes directly with other materials. Unlike steel and glass, it is lightweight. Unlike glass, it is shatter-resistant. Unlike other materials, it can be molded into virtually any shape and it can be virtually any color. Its low cost and minimal energy requirements allow many more companies to use plastics than metal or glass. As a result, plastics manufacturing has evolved rapidly, and the plastics industry has become structurally diverse and complex.
Demand for recycled plastic products and materials generally is increasing and this is stimulating expansion of recycled plastics manufacturing. In fact, there was a 12 percent increase in the number of US scrap plastic facilities between August 1993 and May 1994, from 1,112 to 1,245.[11]
Most of these facilities bale, shred or granulate recovered plastics. About nine percent of scrap plastic handlers nationwide are reclaimers.
Recovery of commercial and household plastics is expected to increase through 1995 as collection, processing and manufacturing capacity all expand and demand for recycled-content plastic products increases. However, several potential stumbling blocks may impede these advances.
[1] Generation equals quantity recovered from the Metro area for secondary uses plus quantity disposed.
[2] This is "post-consumer waste" which is defined in Oregon Statute as "a material that would normally be disposed of as a solid waste, having completed its life cycle as a consumer or manufacturing item." The term "plastic" includes plastic packaging, containers and products made from all major resin types.
[3] This refers to all sources of recovered plastic used by Metro-area processors. It is intended to help define the scope of this emerging industry.
[4] These prices are based on conversations with processors, industry consultants and industry analysts.
[5] "Metro Recycling and Recovery Level Survey"
[6] Based on interview with "Plastics Recycling Update" Editor, Jerry Powell.
[7] From various reports in "Plastics Recycling Update" and "Plastics News"
[8] 1993-94 "Metro Waste Characterization Study, Fall Sort"
[9] "Metro Recycling Level Survey"
[10] "Metro Recycling Level Survey"
[11] "Plastics Recycling Update," May 1994.
[12] Pyrolysis is a thermal process that depolymerizes plastics into a hydrocarbon liquid suitable for use as a feedstock to make plastic products or as a fuel.
Last Updated: December 18, 1995