Stretch Blow Molding

A reliable source for Stretch Blow Molding information and a resource for accessing leading Stretch Blow Molding and suppliers.

Stretch Blow Molding

Stretch blow molded bottles are most commonly made out of PET, or polyethylene terephthalate, which has a polymer microstructure with low permeability to gases and will not contaminate beverages. Stretch blow molded bottles are also made of thermoplastics like acrylonitrile butadiene styrene, polystyrene, polyvinyl chloride, polyamide, polycarbonate, polysulfone, acetal and polypropylene. Read More…

Stretch Blow Molding Stretch blow molding is a process that manufactures plastic containers, most commonly the two liter beverage bottle. It is able to produce uniform finished products that do not need to be joined and therefore do not have a visible seam. The bottles are strong enough to handle the pressure from carbonated beverages, which is about 60 psi. They also hold other beverage and food supplies like mineral water, liquor, juice, beer, cooking oils, peanut butter and milk.

Leading Manufacturers

Clinton, IA  |  563-242-1801

With locations in Clinton & Dewitt, IA, Walnut Ridge, AR & Mexicali, Mexico, Custom-Pak leads the way in advanced blow molding technology, even designing & building energy efficient machines & sophisticated molds for faster, more cost efficient & better quality results. We serve all markets with a wide array of products. Contact us today for more information.

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Custom-Pak, Inc. $$$

Winfield, KS  |  620-221-9464

Western Industries provides custom plastic blow molding product design, engineering, mold design and extensive capabilities and manufacturing expertise for mid- to large-part products, in both single- and dual-head processing. As a blow molder supplier that offers plastic bottles, blow molded cases, & more, contact us for all of your blow molded plastic needs.

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Western Industries Plastic Products LLC $$$

Riverside, CA  |  951-360-6055

At Blow Molded Products, we have experience doing custom blow molding for a multitude of industries, including furniture, sporting goods, health and safety, electronics, and more. We are capable of performing services such as single & double wall blow molding, and mold making—all at a competitive price. Whether it is a carrying case or a custom designed product, no job is too challenging for us. We are ISO 9001 compliant. Contact us today to learn more!

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Blow Molded Products $$$

Sturgis, MI  |  269-651-9488

With blow molding presses from 1 to 80 lbs., Iceberg Molding has the ability & resources for every step of your blow molding requirements - from a competitive part quote to part & product development support start to finish. Iceberg Molding has an established infrastructure like no other. We can simply mold parts for you or completely assemble & ship your finished products anywhere in the world.

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Iceberg Molding $$$

Willowbrook, IL  |  630-750-9494

At LHB Plastics, we don’t just do blow molding. We make it our goal to personalize our projectsto ensure client success. LHB Plastics offers a full range of services, from molded parts to complete assembly. Additional services include engineering support, finished part testing, in-house 3D rapid prototype part printing, and more. Our company is ISO 9001/14001 – 2015 Certified / TS 16949 Compliant. Call LHB or visit our website today to learn more!

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LHB Plastics $$$

Riverside, CA  |  951-354-0258

At R.M.Tool, we provide custom CNC Machining to help our customers solve some of their toughest machining needs. Our state-of-the-art CNC machining department is equipped with Milling, Turning and Wire EDM Machining Centers. We can process materials such as Steel, Stainless, Aluminum, and other Exotic Materials. We strive to always please our customers by always delivering quality products. From design to finished product, R.M.Tool is your one stop shop for all of your CNC machining needs.

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Hi-Rel Plastics & Molding $$$

Manchester, NH  |  603-644-1660

North American Plastics is ISO certified, providing custom plastic injection molding and blow molding products across America. If you need a worry free solution for your project, allow us to serve you as well. Our experience and state of the art injection molding & blow molding equipment allows us to serve a variety of industries. Custom blow molding products include bottles, bellows & containers.

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North American Plastics, Ltd. $$$

Coloma, MI  |  269-849-3200

SPI Blow Molding has provided custom blow molding for a diverse range of industries since 1952. Markets served include electronics, plumbing, agricultural and many more - specializing in low to medium volume work and have a variety of materials available such as HDPE, ABS, polycarbonate, and TPE. No matter what the demands, we are focused on developing a proactive and effective solution for your needs.

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SPI Blow Molding LLC $$$
placeholder image Custom-Pak, Inc. Western Industries Plastic Products LLC Blow Molded Products Iceberg Molding LHB Plastics Hi-Rel Plastics & Molding North American Plastics, Ltd. SPI Blow Molding LLC

There are two different types of stretch blow molding-injection stretch blow molding (ISBM) and reheat blow molding (RHB), both of which use injection molded preforms to produce plastic bottles, which are usually clear and colorless, but may have colored tints. The two step process is very fast and highly repeatable, with larger stretch blow molding machines producing between 15,000 and 20,000 bottles and hour.

Blow Molded Consumer Plastic Bottles Stretch Blow Molding - Custom-Pak, Inc.

There is one main difference between the two types of stretch blow molding. Injection stretch blow molding creates the plastic preforms out of loose pellets on site, often within the same inline conveyor system as the blow molding machine. Since this process requires the use of an injection molding machine, it is high in cost if not done in high runs. Reheat blow molding, on the other hand, does not injection mold the preform. Instead, these manufacturers purchase the preforms already-made and reheat them until soft and formable.

Reheat blow molding eliminates the need for expensive injection molding machinery, which is a costly investment. The rest of the stretch blow molding processes are identical for both methods. The preforms are already made with the bottle neck, which may even have threading for twist-on lids or caps. A metal ram pushes the plastic, forcing it to stretch to the length of the mold cavity. Then, it balloons out by compressed air and internal pressure.

The preform is stretched in hoop and axial directions and adheres with the shape of the mold walls. After it cures and cools down, the newly formed part is ejected from the mold. The process takes mere seconds to finish, and complex designs are possible. The bottles are all recyclable.

Stretch Blow Molding Informational Video