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.

  • Sellersville, PA 800-398-2520

    Since our founding in 1977, Molded Devices has offered its customers the finest in plastic closures, baked-on plastic coats, slush molding and many other products and services. We specialize in large parts, but our manufacturing process can accommodate any shape, any size and any application! We’re looking forward to the opportunity to serve your company.

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  • Waterbury, CT 203-805-4564

    Precision Dip Coating provides dip coating services for the manufacture of soft plastic parts such as cap plugs. hand grips, and more. Decorative and protective, our services are very cost effective and we have a proven track record for on time delivery and precise manufacturing. We can match any color you need, and offer services such as assembly, die cutting, packaging, and decorating.

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  • San Antonio, TX 508-533-6101

    Texas Dip Molding & Coating is known for our high quality custom coating that maximizes strength, hardness, flexibility and durability for parts designed and manufactured in any application. When you need a dip molding solution, turn to Texas Dip Molding & Coating for our experience and wide range of capabilities. We serve a variety of industries and have the expertise necessary to deliver the quality products you need on time every time.

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  • Auburn Hills, MI 800-482-1842

    Rubber & Plastics Co. has 50 years of experience in manufacturing dip molding with the materials, equipment and flexibility to rapidly prototype. We provide standard and custom designed high-temp paint masks, caps, grips and plugs. We have quality plastic dip moldings for a variety of applications and markets. Contact us today to learn more information!

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  • New Carlisle, OH 937-845-9411

    We are a family owned and operated company specializing in the manufacture of quality plastic products, such as plastic closures, paint masks, closures and many other examples. At Carlisle Plastics, we strive to offer our customers the best in service and product quality. We are ISO 9001 certified and have been in the business since 1958. Let us help you find the plastic products you need.

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  • Medway, MA 508-533-6101

    Innovative Coatings is a manufacturer of plastisol dip molding and fluidized bed powder coatings of epoxy, polyolefins, nylon and vinyl. Our dip coatings are of FDA-approved and biomedical grades. Customers can also have a choice of color plus foam, gloss or texture finish. We draw from 40 years of experience in the plastic molding and protective coating industry. Let's talk about your project.

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Plastic Closures 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. As dip molding and dip coating are relatively simple procedures and result in minimal waste, high volume quantities of products 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.

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Applications of Plastic Closures

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 containers for 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 watertight seal between the cap and the container.

Manufacturing Process of Plastic Closures

Plastic closures can be manufactured in a few 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 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. 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.

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Plastic Closure Informational Video