Clamshell Manufacturers and Companies

IQS Directory implements a thorough list of clamshell companies and suppliers. Utilize our listing to examine and sort top clamshell companies with previews of ads and detailed descriptions of each product. Any clamshell company can design and engineer clamshells to meet your companies specific qualifications. An easy connection to reach clamshell companies through our fast request for quote form is provided on our website. The company information includes website links, company profile, locations, phone, product videos and product information. Customer reviews are available and product specific news articles. This source is right for you whether it's for a company of plastic clamshells, stock clamshells, and vented biodegradable clamshells.

  • Greeneville, TN 423-638-1284

    Valk Industries provides engineering and manufacturing of quality products and services, including their superior clamshells. Operations began in 1975 and Valk has expanded from providing custom machining and fabrication processes to over wrapping, component assembly and packaging products which include poster tubes and shipping tubes. Valk is committed to quality, service and reliability.

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  • New Milford, CT 860-354-0885

    For over 40 years, Conlet Plastics has been a leader in clamshell production. They serve a wide variety of industries including medical, airline, automotive and signage, with high-quality products that are reasonably priced & delivered on time. They are fully equipped for prototypes or production of many kinds of blister packs. They also offer in house tooling capabilities.

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  • Stirling, NJ 800-304-3774

    Engineered Plastic Products custom forms & fabricates sheet thermoplastic materials, standard & specialized, for any number of industrial & commercial requirements. EPP has been widely recognized for outstanding manufacturing & service since 1958 for companies such as GE, NASA & AT&T. Custom fabricated parts can be as large as 72"x108" down to 2"x2" in any thickness up to 1 1/2". Post-forming includes all types of machining & assembly.

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  • McSherrystown, PA 717-633-6333

    Founded in 1986, SAY Plastics is a plastics processor specializing in OEM thermoforming. Our state-of the-art facility, located in South Central Pennsylvania, houses the latest manufacturing technologies. From our computer controlled forming equipment and our vacuum molding capabilities, to our brand new high speed CNC Routers, SAY Plastics has the tools for your next project. Our team will work with you every step of the way to ensure quality service every time.

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  • Coleman, MI 877-465-4055

    With over sixty five years in the industry we are the experts you can rely on to bring you top of the line clamshells that you cannot find anyplace else. We are an ISO 9001:2008 and an ISO 14001:2004 certified company dedicated to providing you with customer service that stands above the rest. To learn more about what we may do for you get in touch with our customer service department via telephone or email today!

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  • More Clamshells Companies

businessIndustry Information


Clamshells are resealable one-piece containers made up of two halves, held together by a hinge. Named after the clamshells found in nature, who also open and close on a hinge, they are typically composed of a rigid plastic like clear PVC or polystyrene. They can, however, also be made of other materials, like cardboard. Clamshells are highly useful, offering products increased visibility and protection from theft, tampering and environmental conditions like rain. They are also very lightweight, carrying an impressive strength to weight ratio. These factors, along with the fact that they are inexpensive to produce, make clamshells popular for packaging, shipment and product display applications in a variety of industries, such as: clothing, cosmetics, electronics, entertainment, food and beverage, healthcare, household appliance, office supply and retail.

Types of plastic used to create clamshells include polystyrene, polyvinyl chloride (PVC), polyester and various other thermoplastics and polymers. Every plastic type offers different qualities. Polystyrene, for example, is hard, clear and inexpensive to produce. It is available a variety of different forms, including solid sheet/molded plastic and foam. In addition to being clear, it can also be colored. It, however, is known to degrade very slowly and its use is regarded dubiously by environmental scientists. PVC, on the other hand, is known as an excellent insulator and resistor of the chemicals in substances like salts, acids, fats, bases, fuels, paint thinners and alcohols. It may be rigid or elastic. PVC degrades much better than polystyrene, but it still should be recycled rather than thrown away. Finally, polyester is unique as well. It is available in different types, with varying hardnesses and thermal and chemical stabilities. Also, polyester clamshells have refreshingly low toxicity levels and are recyclable.

Clamshells can be made using a variety of plastic forming processes, but the most common methods implemented on their behalf are thermoforming, pressure forming and vacuum forming. Thermoforming is a process by which plastic material is heated, stretched and cooled into parts. Pressure forming and vacuum forming are both sub-processes of thermoforming and, therefore, they all begin the same way: First, plastic sheets are fed into heaters powered either by electricity, infrared radiation or natural gas, where they are warmed until they elastic and malleable. Once this step is complete, they are transferred to a forming station, which is where the deviations take place. If, at this point, the plastic is being pressure formed, pressurized air pushes it into a pressure-controlled mold. If, instead, it is being vacuum formed, the plastic will be enclosed in a mating mold and pressure box, where a vacuum will suction all of the air out and pull the plastic into the mold. Both methods are viable, but if a manufacturer is attempting to form a clamshell with greater precision or with more intricacies, pressure forming is the recommended choice, because it yields stronger adherence. Whatever a manufacturer’s choice, once the plastic has cooled, it is ejected from the mold using rigid reverse airflow. At this point in the process, the clamshell exists either as two separate components or a single sheet. If the former is the case, manufacturers proceed by fusing the edges together to create a hinge, using either stamping, welding or heat treatments. If the latter, manufacturers simply fold the sheet to create a hinge, then heat seal it.

These methods create a number of different clamshell types, such as clamshell trays, egg crate clamshells and tri-fold clamshells. Clamshell trays are used to package and display products simultaneously, like, for example, blueberries and other fruit, small tools like screws and pins and any number of other items. Egg crate clamshells, on the other hand, hold and divide products. They are named, of course, after egg cartons, though they also hold other rounded items, like golf balls. Finally, tri-fold clamshells are designed with a flat bottom so they can stand on display. These can be used to hold all sorts of products, like remote controls and other electronic goods, locks, handheld thermometers, sporting goods and more. In addition to these standard designs, clamshells are also available in a variety of custom configurations, and, of course, all clamshells are purchasable in different shapes and sizes. To find out more, reach out to an experienced clamshell and packaging manufacturer today.

More Clamshells

Valk Plastic Clamshell Packaging
Clamshell Product Packaging
Clamshells – Valk Industries, Inc.
Clamshells – Valk Industries, Inc.

Clamshells Informational Video