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A reliable source for Clamshells information and leading Clamshells Companies & Suppliers.

Though the term clamshell may apply to a number of devices that consist of two hinged parts and open and close in a fashion similar to the two shells of a clam, it is most commonly applied to the plastic packaging of this design. Read More…

Clamshells Clamshells are specially-shaped plastic containers with two hinged halves composed of rigid plastic that when sealed together encapsulate a product.
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Leading Manufacturers

Greeneville, TN  |  423-638-1284

Valk’s policy is “to meet or exceed our customer’s requirements, working together as a team with honesty and integrity.” Valk’s success is due to their long standing focus on quality & customer service.

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Valk Industries, Inc. $$$

New Milford, CT  |  860-354-0885

For over 40 years, Conlet Plastics has been a leader in vacuum forming. They serve a wide variety of industries including medical, airline, automotive and signage, with high-quality products that are reasonably priced & delivered on time.

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Conlet Plastics, Inc. $$$

Lake Bluff, IL  |  847-604-5100

Since 1960, Profile Plastics Inc. has been at the forefront of thermoforming technology. Utilizing the latest software and technology, our expert staff of engineers can design custom vacuum, pressure, and twin-sheet thermoformed solutions. Over the last 60 years, we have developed a process that allows us to deliver consistent, high volume, and precise products with superior quality. Our high quality products are manufactured with great attention to detail. ISO 9001:2008 certified.

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Profile Plastics, Inc. $$$

Stirling, NJ  |  908-647-3500

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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Engineered Plastic Products, Inc. $$$

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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SAY Plastics, Inc. $$$

Danville, IL  |  (844)865-1669

Greenwood Plastics Industries is an industry leader has been a leader in vacuum formed plastics for many years. We believe in relationships that can produce smart productivity. You give us the idea, and we will help you choose the best materials, process and timeline to make a high quality and profitable product. We are also committed to earth friendly-green solutions. Recycling as much as possible has been a company initiative for year and we are taking big steps at reducing our carbon footprint.

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Greenwood Plastics, Inc. $$$

Coleman, MI  |  877-465-4055

Robinson Industries offers thermoformed and injection molded reusable, heavy duty plastic pallets, packaging and more. We are one of the largest suppliers of reusable pallets to many industries.

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Robinson Industries $$$
placeholder image Valk Industries, Inc. Conlet Plastics, Inc. Profile Plastics, Inc. Engineered Plastic Products, Inc. SAY Plastics, Inc. Greenwood Plastics, Inc. Robinson Industries

Most commonly made of clear polyvinyl chloride or PVC, durable clamshell containers are preferred by retailers as they provide increased product visibility from several different angles. Clamshells also protect products from environmental factors while deterring theft and tampering as they are difficult to open, often requiring the use of a knife or scissors. Despite there rugged construction, clamshells are lightweight with a high strength to weight ration that makes them suitable and inexpensive for product display, packaging and shipment.

Clamshell Product Packaging Clamshells - Valk Industries, Inc.

Such versatility makes clamshells among the most popular plastic packaging forms available and they are commonly employed in such varied industries as food, cosmetic, medical, entertainment, household appliances, office supply, packaging, clothing, retail and electronics. Custom and stock forms are widely available in a number of different shapes and sizes. Molds are often based off of a specific product to ensure the best fit and visibility.

A number of plastic forming processes can be implemented in the production of clamshell containers. Thermoforming and vacuum forming processes begin with sheets of PVC that are fed into electric, natural gas or infrared heaters. Materials are warmed until they become pliable and soft, at which point they are guided into a forming station. A mating mold and pressure box enclose the sheet before a vacuum is used to remove all excess air, pulling the plastic into the mold.

Pressure forming is used when precision molding is desired or required as high air pressure causes greater adherence to the mold allowing for the production of finer detail in the finished clamshell than thermoforming alone. In either case, the PVC is cold while still on the mold. Once rigid reverse air flow ejects the clamshell which may be two separate components or on a single sheet that is folded to create a hinge.

Once the product is placed within the shell, the edges are fused through heat treatments, welding or stamping to create an airtight case. The most common types of clamshells include tri-fold clamshells which have a flat bottom for standing on display, clamshell trays which combine packaging with product display and egg crate clamshells which hold and divide several like products such as golf balls.

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