Leading Clamshell Manufacturers

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.

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.

Valk Industries, Inc. $$$

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...

Profile Plastics, Inc. $$$

Quality Plastics has been a leading manufacturer of vacuum forming since 1976. Whether you need a small batch of custom vacuum-formed parts or a large-scale production run, we have the capabilities and expertise to deliver. We are committed to providing our customers with exceptional vacuum-formed products and services that meet their needs and exceed their expectations. Contact us today to learn ...

Quality Plastics Inc. $$$

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...

Engineered Plastic Products, Inc. $$$

At Lerner Molded Plastics, we specialize in crafting high-quality vacuum-formed products tailored to meet the diverse needs of our clients. With years of expertise in the industry, we take pride in our ability to deliver innovative solutions that exceed expectations.

Lerner Molded Plastics $$$

RapidMade is a leader in thermoforming and vacuum forming solutions, offering unmatched customer experience, quality, and speed. We cater to diverse needs with a broad material and equipment portfolio, ensuring cost-effective, engineered parts. Trust us for reliable, timely delivery of your small to medium batch plastic projects, meeting the highest industry standards. Choose RapidMade for...

RapidMade $$$

At Duo Form, we are pioneers in the realm of vacuum-formed plastic products. With a collective passion for precision engineering and creative problem-solving, we've established ourselves as leaders in delivering high-quality solutions to a wide range of industries.

Duo Form $$$

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.

Robinson Industries $$$
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placeholder image Valk Industries, Inc. Profile Plastics, Inc. Quality Plastics Inc. Engineered Plastic Products, Inc. Lerner Molded Plastics RapidMade Duo Form 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.

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.

Clamshells Informational Video


Vacuum Forming Power Pages



Thermoforming is the process of heating thin plastic sheets to its forming temperature and stretching it over a mold which takes its shape. After cooling and setting of the molded plastic sheet, each part will be separated from its batch to form a single unit or product...

Vacuum Forming

Vacuum Forming

The process of heating and shaping the plastic material using a vacuum is called vacuum forming. Vacuum forming is one of the oldest and cheapest methods for plastic molding and is widely used in our everyday life, from smaller objects to huge industrial machinery...

Blister Packaging

Blister Packaging

Blister packaging, or blister packs, are pre-formed packaging materials composed of a thermoformed plastic cavity and a pliable lid. In this type of packaging, the product is placed in deep-drawn pockets or cavities resembling a blister...

Plastic Bags

Custom Merchandise Plastic Bags

A plastic bag is an unwoven single piece poly fabricated container for storing, carrying, and packaging of a wide variety of items and materials. Though they are very thin and easy to carry, plastic bags are strong, waterproof...

Contract Packaging

Contract Packaging

Contract packaging involves putting a specific product into its completed packaging using a contracting business. It is also known as co-packing or co-packaging. A company can hire another business entity for the production of its packaging, product assembly and...

On-Demand Manufacturing

The manufactured demand definition, often known as on-demand manufacturing or manufacturing on demand (MOD), is a relatively new idea in the manufacturing industry. In an on-demand manufacturing system, goods are only produced as...

Plastic Molding Processes

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