Plastic Closures Companies and Manufacturers

IQS Directory provides a comprehensive list of plastic closure companies and suppliers. Use our website to review and source top plastic closure companies with roll over ads and detailed product descriptions. Find plastic closure companies that can design and engineer plastic closures to your companies specifications. Then contact the plastic closure companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product new articles. Whether you are looking for manufacturers of plastic closure moldings, plastic closure plugs, plastic closure seals, or customized plastic closures of every type, this is the resource for you.

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  • Plastic Closures in Your World

    Plastic Closures Plastic is an integral part of our everyday lives. Nearly every aspect of our lives contains some form of plastic, from toys, to computer parts, to dishes, and beyond. It is nearly impossible to avoid all uses of plastic in the home and in the business world. Plastic closures are a popular use for plastic, because plastic is easy to mold and shape into different sizes and shapes to keep containers closed. Plastic closures are one of the simplest ways to safely close containers made of plastic or...

  • Plastic Closures: Watching a Cap Forming Machine First-Hand

    Most plastic caps and many other plastic closure types are created using large industrial injection molded plastic machines. Injection molded plastic injects a small amount of plastic into a cap-shaped mold. The plastic is then dried and released from the machine in one smooth motion. Watching a plastic cap machine in first-person action is an interesting process. It is amazing to see how humans have been able to transform basic parts into fully-functional parts that can create other useful tools and pieces for everyday life. Many plastic cap machines can...

Industry Information

Plastic Closures

Plastic closures are plugs, caps and seals that are protective devices for the ends of products to keep containers closed and their contents inside. Tubes, pipes, fittings, connectors, bottles and jars all require closures to seal their openings. Common examples include bottle caps, camera lens caps, car plugs and decorative caps.

Plastic closures can be manufactured in different ways including plastic injection forming and blow forming, however the most common manufacturing process is dip molding which uses a mandrel, or mold, dipped into molten plastic material. The mold is fully immersed into a molten polymer such as plastisol or PVC for a specific amount of time dependent on the desired thickness of the plastic. It is then removed slowly and allowed to harden. Heat treatment is used with some plastics in order to achieve the desired material results. When the plastic coating has fully solidified, it is removed from the mold and if necessary goes through further finishing techniques, although because of plastic’s elastic properties, secondary processing is typically not needed. For plastic closure manufacturing, a mandrel is produced with the exact dimensions of a container, part or product requiring a seal, closure or plug and when dipped into the molten plastic produces an exact fit.

Industries such as chemical, photography, agricultural and packaging all use plastic closures for a number of applications. Common shapes of plastic plugs and plastic caps include round, square and rectangular, but closures can be manufactured in any shape. As plastic is able to be adjusted according to color and texture, plugs, caps and closures can be manufactured to match a customer’s specifications. Materials, colors, sizes and required strength of closure are all aspects that should be considered when manufacturing plastic closures for a specific use. While closures can be used for decorative purposes, the main reason for using a cap is for its protective qualities. Not only do closures keep contents in a container, they also prevent unwanted contact with outside elements. For items such as medicine bottles and pill containers, or sensitive chemicals, tamper evident caps and closures may be required. For other products that require a tighter seal, threaded closures can be manufactured using a mold designed for this purpose. Threaded closures are twist-on and create a water tight seal between the cap and the container. As dip molding and dip coating are relatively simple procedures and result in minimal waste, high volume quantities of products such as caps and closures can be produced in a short space of time. Furthermore, as dip molding is an almost fully automated procedure, there are less labor costs to be considered.

Plastic Closures
Plastic Closures
Plastic Closures - Carlisle Plastics Company
Plastic Closures - Carlisle Plastics Company

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