Leading Stretch Blow Molding Companies

Stretch Blow Molding

Stretch blow molding is a widely used manufacturing process for producing plastic containers of various shapes and sizes, including bottles, jars, and other packaging products. This process involves stretching a preform, a plastic tube, to a specific length and diameter before blow molding it into the desired shape. In this article, we will discuss the process of stretch blow molding, the materials used in this process, the benefits, and applications of this manufacturing process. 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.

No matter what your blow molding needs are Western Industries is ready to assist you. We believe in thinking outside the mold and using unique methods to come up with large-part blow molding solutions for our customers. We have access to state-of-the-art technology and over 100 years of combined experience serving a variety of industries. When you choose Western Industries, you have the Western...

Western Industries Plastic Products LLC $$$

At Lerner Molded Plastics, we specialize in crafting high-quality blow molded 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.. For more information about our capabilities, contact us today!

Lerner Molded Plastics $$$

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 $$$

Founded in 1984, Hi-Rel Plastics & Molding, Inc. is a turn-key manufacturer who offers custom blow molding and custom plastic injection molding for a variety of industries. With more than 35 years of experience, our quality products are unparalleled. We process an almost infinite variety of thermoplastic resins, our prices are competitive, our delivery is on time, and we offer superior customer...

Hi-Rel Plastics & Molding $$$

Valencia Plastics is a leading edge blow molder with new methods to add value & ensure superior quality for any job from 10 grams to 3 lbs. Discover our expertise with many plastics & a wide range of machinery. Customers can expect the best from concept to end blow molded plastic product. Industries we serve include aerospace, defense, medical, commercial & pharmaceutical.

Valencia Plastics $$$

Since 1952, SPI Blow Molding has provided custom blow molding for a diverse range of industries, such as agricultural, plumbing, electronics, and more. Our team can meet your needs with a variety of plastics, such as HDPE, ABS, polycarbonate, and TPE. Secondary operations and assembly services are also available. SPI is a leader in our industry due to our customer-oriented ability to deliver...

SPI Blow Molding LLC $$$

EXI-plast is a full-service provider of custom plastic moulding services, specializing in blow moulded solutions for customers worldwide across a wide variety of industries. With over 30 years of experience developing, producing, and finishing custom plastic products, we have also become a sustainability leader through the integration of postconsumer resins. With products ranging from less than...

Exi-Plast Custom Moulding Ltd. $$$
Get Your Company Listed
placeholder image Western Industries Plastic Products LLC Lerner Molded Plastics Iceberg Molding Hi-Rel Plastics & Molding Valencia Plastics SPI Blow Molding LLC Exi-Plast Custom Moulding Ltd.

The Process of Stretch Blow Molding

There are different variations of the stretch blow molding process. The beginning of the process may vary, but they all share a similar end. Some of the more popular stretch blow molding processes are discussed below.

Injection Stretch Blow Molding

This process involves melting plastic pellets and injecting the molten material into a preform mold. The mold is then cooled, and the preform is ejected and transferred to the blow mold. In the blow mold, the preform is stretched and blown into the desired shape.

Extrusion Stretch Blow Molding

extrusion stretch blow molding involves extruding a plastic tube, which is then cut into preform lengths. The preforms are then cooled and transferred to the blow mold, where they are stretched and blown into the desired shape.

Reheat and Blow Molding

This process involves reheating a preform that has already been injection-molded or extruded. The preform is then transferred to the blow mold, where it is stretched and blown into the desired shape.

Materials Used for Stretch Blow Molding

The most commonly used material for stretch blow molding is polyethylene terephthalate (PET), which is a lightweight, strong, and durable material that is widely used for producing bottles, jars, and other containers. However, other materials such as polypropylene (PP), polyvinyl chloride (PVC), high-density polyethylene (HDPE), polystyrene (PS), and polyethylene naphthalate (PEN) can also be used for stretch blow molding. Each material has its unique properties that make it suitable for specific applications. For example, PP is used for producing containers that require high-temperature resistance, while HDPE is used for producing containers that require good chemical resistance.

Considerations Regarding Stretch Blow Molding

Despite its benefits, there are some considerations related to stretch blow molding, including:

Environmental Concerns

The use of plastic materials in stretch blow molding has led to environmental concerns, particularly related to plastic waste and its impact on the environment.

Quality Control Issues

The process of stretch blow molding can result in defects such as pinholes, wall thickness variations, and uneven distribution of material.

Limited Design Capabilities

The stretch blow molding process has limitations in terms of design capabilities, particularly with regard to complex shapes and intricate features.

Benefits of Stretch Blow Molding

Despite these considerations, stretch blow molding has many benefits that make it an attractive manufacturing process, including:

Low Cost

Stretch blow molding is a cost-effective process compared to other manufacturing processes.

High Production Speed

Stretch blow molding can produce large quantities of containers in a short period.


Stretch blow molding can produce containers of various shapes, sizes, and materials, making it suitable for a wide range of applications.


Containers produced through stretch blow molding are strong and durable, making them suitable for transporting and storing products.


Containers produced through stretch blow molding are lightweight, making them easy to handle and transport.


Most materials used for stretch blow molding are recyclable, making it an environmentally friendly manufacturing process.

Applications of Stretch Blow Molding

Due to these benefits, stretch blow molding is used in a wide range of industries and applications, including:

Food and Beverage Packaging

Stretch blow molding is widely used for producing bottles and jars for food and beverage packaging.

Personal Care and Cosmetics Packaging

Stretch blow molding is used for producing bottles and jars for personal care and cosmetics products.

Pharmaceutical Packaging

Stretch blow molding is used for producing bottles and containers for pharmaceutical products.

Automotive Industry

Stretch blow molding is used for producing parts such as fuel tanks, air ducts, and other automotive components.

Industrial Applications

Stretch blow molding is used for producing containers for industrial chemicals, lubricants, and other products.

Household Products

Stretch blow molding is used for producing containers for household cleaning products, detergents, and other household products.

Medical Devices

Stretch blow molding is used for producing containers, tubes, and other components for medical devices and laboratory equipment.

Sports Equipment

Stretch blow molding is used for producing water bottles, athletic equipment, and other products used in sports and recreation.

Toys and Novelties

Stretch blow molding is used for producing plastic toys, novelties, and other consumer products.

Pet Products

Stretch blow molding is used for producing containers, toys, and other products for pets such as dogs, cats, and birds.

Choosing the Right Stretch Blow Molding Manufacturer

To ensure you have the most beneficial outcome when choosing a stretch blow molding manufacturer, it is important to compare several companies using our directory of stretch blow molding manufacturers. Each stretch blow molding manufacturer has a business profile page highlighting their areas of experience and capabilities, along with a contact form to directly communicate with the manufacturer for more information or to request a quote. Review each stretch blow molding business website using our patented website previewer to quickly learn what each company specializes in. Then, use our simple RFQ form to contact multiple stretch blow molding companies with the same form.

Stretch Blow Molding Informational Video


Blow Molded Plastics Power Pages

Blow Molding

Blow Molding

Blow molding is a type of plastic forming process for creating hollow plastic products made from thermoplastic materials. The process involves heating and inflating a plastic tube known as a parison or preform. The parison is placed between two dies that contain the desired shape of the product...

Plastic Bottles

Plastic Bottles

Plastic bottles are bottles made of high or low-density plastic, such as polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polycarbonate (PC), or polyvinyl chloride (PVC). Each of the materials mentioned has...

Plastic Materials

Plastic Materials

Plastic materials are objects artificially made from organic compounds called polymers along with other additive components. They possess excellent formability, making them extremely versatile for many different fabrication and manufacturing processes...

Plastic Tanks

Plastic Tanks

A plastic tank is a large capacity liquid or granular storage unit that can be vertical, horizontal, below or above ground, and permanent in place or movable. They are designed to hold several gallons of a variety of substances...

Plastic Containers

Plastic Containers

Plastic containers are material storage products made of a variety of plastics. Plastics are an ideal material for creating containers. They are known for their excellent formability, degradation resistance, durability, lightweight, recyclability, and controllable mechanical properties...

Carrying Cases

Carrying Cases

A carrying case is a way of conveniently organizing and transporting a collection of similar or dissimilar items for future use. There is a type and kind of carrying case to fit every possible application from protecting and...

Plastic Molding Processes

Featured Industries