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Plastic Closures

A reliable source for Plastic Closures information and leading Plastic Closures Companies.

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. Read More…

>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.
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Leading Manufacturers

Sellersville, PA  |  800-398-2520

We are plastic experts, and we offer many services for our customers, including dip molding and a whole lot more. No matter who our customers are, we will work our hardest to ensure that you are fully satisfied with our products.

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Molded Devices, Inc. Sellersville $$$

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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Precision Dip Coating LLC $$$

New Carlisle, OH  |  937-845-9411

Carlisle Plastics is a dip molding plastics manufacturer offering end caps, plastisol paint masks, thread protectors, tube closures, protective caps and decorative caps.

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Carlisle Plastics Company, Inc. $$$

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.

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Innovative Coatings, Inc. $$$

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.

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Texas Dip Molding & Coating, Inc. $$$

Auburn Hills, MI  |  800-482-1842

Rubber & Plastics Company 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.

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Rubber & Plastics Company $$$
placeholder image Molded Devices, Inc. Sellersville Precision Dip Coating LLC Carlisle Plastics Company, Inc. Innovative Coatings, Inc. Texas Dip Molding & Coating, Inc. Rubber & Plastics Company

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.

Carlisle Plastics Hex PVC Caps Plastic Closures - Carlisle Plastics Company

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 Closure Informational Video

 

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