Sajar Plastics Inc is an American plastics manufacturing business with a history dating back to 1949. Based in Middlefield, Ohio, the company became known for producing large, complex plastic components through specialized injection molding processes. Its manufacturing expertise includes gas-assist injection molding, structural foam molding, and conventional injection molding.
Unlike consumer brands that sell finished plastic products directly to shoppers, Sajar Plastics has primarily served other businesses, particularly original equipment manufacturers (OEMs) that need custom-designed components for their products. Its work has been associated with medical equipment, laboratory systems, retail technology, and industrial applications. universalplastics.com+2
An important part of the company’s history is its acquisition by Universal Plastics in 2017. This brought Sajar’s injection molding experience into a larger manufacturing group with complementary plastics-processing capabilities. Understanding its background, production methods, and ownership helps explain why Sajar Plastics remains a recognizable name in the custom plastics industry.
What Is Sajar Plastics Inc?
Sajar Plastics Inc is a custom plastics manufacturer historically associated with injection molding and the production of large, engineered plastic parts. Its customers require components designed around specific technical, functional, and appearance requirements rather than standard products made for general retail sale.
A manufacturer might need a durable equipment housing, a large protective cover, a control panel, or a molded cabinet. Instead of manufacturing these parts in-house, the business can work with a specialist such as Sajar to develop and produce components that meet its design specifications.
Sajar built its reputation around complex molded parts, particularly products that require a combination of structural performance and an attractive surface finish.
Its manufacturing history also includes involvement in the development of gas-assist injection molding, a process that helped expand the possibilities of producing larger and more complicated plastic components.
The History and Background of Sajar Plastics
Early Beginnings in 1949
Sajar Plastics was established in 1949 in Middlefield, Ohio. The company started with a focus on conventional plastic injection molding and gradually developed its manufacturing knowledge, equipment, and production capabilities.
Over the following decades, it became associated with specialized plastic manufacturing and large-part molding. Rather than concentrating on one type of finished product, the business developed processes that could serve different industries and technical applications.
The name Sajar itself has an interesting origin. A historical company profile published in 2017 explains that it was formed from an acronym representing the last names of the company’s founders. universalplastics.com
Development of Gas-Assist Injection Molding
One of the most important developments in Sajar’s history was its involvement in gas-assist injection molding during the early 1980s.
The company was identified as one of three original businesses involved in developing this manufacturing technology. This helped establish its reputation in a specialized area of the plastics industry.
Gas-assist molding eventually became an important part of its manufacturing identity, particularly for large components that required attractive finishes and carefully designed internal structures.
Manufacturing Capabilities of Sajar Plastics Inc
Sajar Plastics developed several manufacturing processes to support businesses with different product designs and production requirements. Each process offers specific advantages depending on the component’s size, shape, strength, appearance, and intended use.
1. Gas-Assist Injection Molding
Gas-assist injection molding is one of the technologies most closely associated with Sajar Plastics.
In this process, molten plastic is injected into a specially designed mold. Pressurized gas, commonly nitrogen, is introduced during the molding cycle to create hollow sections or assist the movement of material through the mold.
This technique can help manufacturers produce large components with complex geometries while managing material consumption and maintaining an attractive exterior finish.
Its advantages can include:
- Reduced material use in suitable applications.
- Lower component weight.
- Improved dimensional stability.
- Greater flexibility in designing large parts.
- Attractive surface finishes.
- Potential manufacturing cost savings.
Gas-assist molding can be particularly useful when traditional injection molding would make a component unnecessarily heavy or require a more complicated design.
2. Structural Foam Molding
Structural foam molding is another process associated with Sajar Plastics.
It uses a foaming agent during the molding process to create a cellular internal structure within a plastic component. This structure can provide useful strength and rigidity without requiring the same amount of solid material throughout the part.
Structural foam molding is often considered for larger components that need a combination of durability, weight management, and practical production costs.
Potential applications include equipment housings, industrial enclosures, cabinets, and other engineered plastic structures.
3. Conventional Injection Molding
Conventional or straight injection molding is a widely used method for manufacturing plastic components.
The process involves heating plastic resin until it melts, injecting the material into a mold, and allowing it to cool before removing the finished part.
Its flexibility makes it suitable for producing components with consistent dimensions and repeatable designs.
For manufacturers, conventional injection molding can be useful when a product requires precise shapes, dependable production quality, and consistent output across manufacturing runs.
4. Secondary Manufacturing and Finishing
Producing a molded component is not always the final step in manufacturing. Many industrial customers need additional operations before a part is ready for assembly or installation.
Historical information about Sajar identifies several secondary services, including:
- Painting and surface finishing.
- Product labeling.
- Printing and decoration.
- Assembly operations.
- Packaging.
- Additional component preparation.
These services can help businesses reduce the number of separate suppliers involved in their manufacturing processes. universalplastics.com+1
What Products Does Sajar Plastics Manufacture?
Sajar Plastics is associated with custom-engineered plastic components rather than a conventional retail product range. Its manufacturing processes have been used to produce large parts for equipment and commercial applications.
Examples include:
Equipment Covers and Housings
Protective covers and equipment housings are important applications for large-part injection molding.
These components help protect internal machinery, electronic systems, and other equipment from physical contact and environmental exposure.
Their designs may require specific dimensions, mounting points, openings, and surface finishes.
Medical Equipment Components
Medical equipment manufacturers often require carefully designed plastic components for machines and supporting systems.
These may include equipment covers, protective panels, trays, and enclosures. Such components need to meet the technical specifications established by the equipment manufacturer.
Historical information about Sajar identifies medical equipment as one of its application markets.
Laboratory and Diagnostic Components
Laboratories and diagnostic facilities use specialized equipment that often contains custom plastic housings and structural components.
Manufacturers may require parts with precise dimensions, consistent quality, and designs that accommodate electronic or mechanical systems.
Retail and Business Equipment
Sajar’s historical customer applications also included business equipment and retail registers or dispensing machines.
These products can require durable external panels, doors, bezels, and other molded components that combine functionality with an attractive appearance.
Industrial Components
Industrial machinery and commercial equipment frequently use plastic parts to reduce weight, protect internal systems, and provide customized design features.
Large-part molding gives manufacturers additional options when developing these components.
Industries Served by Sajar Plastics
Sajar’s manufacturing background reflects the importance of specialized plastics across several industries.
| Industry | Potential component applications |
|---|---|
| Medical equipment | Machine covers, housings, and trays |
| Laboratory and diagnostics | Equipment enclosures and protective panels |
| Manufacturing | Industrial housings and machine components |
| Business equipment | Cabinets, doors, and structural parts |
| Retail technology | Register housings and dispensing equipment |
These applications demonstrate why custom plastic manufacturing is important to businesses that develop specialized equipment.
A single molded component may need to satisfy several requirements, including durability, weight, appearance, and compatibility with other parts of a larger product.
Sajar Plastics and Its Acquisition by Universal Plastics
One of the most significant events in the company’s history was its acquisition by Universal Plastics in 2017.
The acquisition was announced on July 6, 2017. Universal Plastics, a Massachusetts-based manufacturer specializing in heavy-gauge thermoforming, purchased Sajar Plastics, which was based in Middlefield, Ohio.
The financial terms of the transaction were not publicly disclosed. PRWeb
Why Did Universal Plastics Acquire Sajar?
The acquisition created an opportunity to combine two complementary manufacturing capabilities.
Universal Plastics already had experience in custom thermoforming, while Sajar brought specialized knowledge of gas-assist injection molding and large plastic components.
This combination offered customers more manufacturing options as their products developed.
For example, a business might initially use thermoforming when developing a product or producing relatively small quantities. As demand increases or product requirements change, injection molding may become a more suitable option.
By bringing these capabilities together, Universal Plastics aimed to support customers across different stages of product development and manufacturing.
What Changed After the Acquisition?
According to the original acquisition announcement, Sajar was expected to maintain its existing facilities, employees, and procedures following the transaction.
The announcement also emphasized the importance of customer relationships, product quality, and expanding manufacturing opportunities.
The acquisition therefore represented more than a change in ownership. It was also a strategic effort to strengthen the manufacturing capabilities available within the Universal Plastics group. PRWeb
The Importance of Sajar Plastics in the American Manufacturing Industry
Sajar Plastics provides an example of how specialized manufacturing businesses contribute to the wider American industrial sector.
Many products depend on components that consumers rarely notice. Medical machines, laboratory equipment, retail systems, and industrial machinery all require carefully designed parts that support their operation.
Custom plastics manufacturers help businesses develop these components according to specific product requirements.
Supporting Product Innovation
Manufacturing innovation often begins with solving a practical design problem.
A product developer may need a lighter enclosure, a larger molded structure, or a component with a more attractive surface finish. Specialized molding technologies can provide solutions that are difficult to achieve through conventional manufacturing methods.
Sajar’s historical involvement in gas-assist molding illustrates how improvements in manufacturing processes can expand product design possibilities.
Improving Manufacturing Efficiency
Material usage, production time, component weight, and finishing requirements all influence manufacturing costs.
Processes such as gas-assist injection molding can help optimize certain designs by reducing the amount of plastic required in selected sections.
The exact benefits depend on the material, mold design, production volume, and application.
Serving Original Equipment Manufacturers
Original equipment manufacturers rely on suppliers that understand their product specifications and production requirements.
A custom molding partner can support the development of components that fit into larger systems, helping OEMs focus on product engineering, assembly, and distribution.
This business-to-business manufacturing model has been central to Sajar’s historical identity.
What Should Businesses Consider When Choosing a Plastic Injection Molding Company?
Sajar Plastics’ manufacturing history also highlights several factors businesses should evaluate when selecting a custom plastics supplier.
Manufacturing Technology
Not every molding process is suitable for every product. Businesses should compare conventional injection molding, structural foam molding, gas-assist molding, and thermoforming based on their component requirements.
The right process depends on product geometry, material selection, production quantities, and performance expectations.
Engineering Support
A reliable manufacturing partner should understand product specifications and help identify possible design improvements.
Early engineering discussions can help businesses avoid production complications and make better decisions about tooling, materials, and component construction.
Quality Management
Consistent manufacturing quality is essential when plastic components become part of medical, industrial, or commercial equipment.
Businesses should request relevant quality documentation and confirm that a supplier’s processes meet the requirements of their particular industry.
Production Capacity
Component size, order quantities, equipment availability, and production schedules all influence whether a supplier is suitable for a project.
Manufacturers should confirm current production capabilities directly rather than relying on historical facility descriptions or outdated business-directory figures.
Finishing and Assembly Services
Some projects require more than molded plastic parts. Painting, printing, labeling, assembly, and packaging may also be necessary.
Working with a supplier that can coordinate several production stages may simplify procurement and reduce supply-chain complexity.
Is Sajar Plastics Inc Still Operating?
Sajar Plastics is historically associated with the manufacturing facility in Middlefield, Ohio, and became part of Universal Plastics following the 2017 acquisition.
The business name also appears in industry directories and historical company information. More recent records and references may use variations of the Sajar name or identify the operation through Universal Plastics.
However, historical information alone cannot confirm current machine availability, staffing, production schedules, or the precise legal status of a particular business entity.
Anyone interested in placing an order, applying for employment, or establishing a supplier relationship should verify current operating details directly with Universal Plastics.
This distinction is important because company ownership, facility operations, and legal business names can change over time.
Final Thoughts
Sajar Plastics Inc has an established place in the history of specialized American plastics manufacturing. Founded in 1949, the company developed expertise in gas-assist injection molding, structural foam molding, and conventional injection molding.
Its manufacturing background includes large, complex plastic components used in medical, laboratory, business, retail, and industrial applications.
The 2017 acquisition by Universal Plastics marked an important stage in its development, bringing its injection molding experience together with complementary thermoforming capabilities.
For businesses researching custom plastic manufacturing, Sajar’s history demonstrates the value of specialized production methods, engineering knowledge, and flexible manufacturing solutions. Its story also highlights how established manufacturers can become part of larger industrial groups while contributing valuable technical expertise to the plastics industry.
Frequently Asked Questions (FAQs)
1. What is Sajar Plastics Inc known for?
Sajar Plastics is known for custom plastic manufacturing, particularly gas-assist injection molding, structural foam molding, and conventional injection molding. It developed a reputation for producing large and complex plastic components.
2. Where was Sajar Plastics Inc located?
Sajar Plastics was historically based at 15285 South State Avenue in Middlefield, Ohio, United States.
3. When was Sajar Plastics founded?
The company was established in 1949 and developed its manufacturing capabilities over several decades.
4. Who owns Sajar Plastics Inc?
Universal Plastics acquired Sajar Plastics in 2017. The acquisition brought Sajar’s specialized injection molding expertise into the Universal Plastics group.
5. What is gas-assist injection molding?
Gas-assist injection molding is a manufacturing process that introduces pressurized gas during plastic injection molding. It can help create large, complex components while reducing material usage in suitable designs.
6. What products does Sajar Plastics manufacture?
Its historical product applications include equipment covers, doors, bezels, cabinets, skins, medical equipment components, laboratory parts, and retail dispensing equipment.
7. What industries has Sajar Plastics served?
The company has been associated with medical, laboratory, diagnostic, manufacturing, business equipment, and retail technology markets.
8. Why did Universal Plastics acquire Sajar?
Universal Plastics acquired Sajar to add specialized gas-assist injection molding to its existing thermoforming capabilities. The combination offered customers more manufacturing options throughout different stages of product development.
9. Is Sajar Plastics still in business?
Sajar became part of Universal Plastics in 2017. For confirmation of current operations, available services, and business contact details, customers should consult Universal Plastics directly.
10. What makes gas-assist injection molding useful?
It can help manufacturers produce large plastic components with complex shapes, reduced weight, and attractive surface finishes. Its suitability depends on the component design and production requirements.
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