TL;DR: Custom thermoformed plastics offer a flexible way to create durable, purpose-built packaging around specific product dimensions, shapes, and handling needs.
This blog explores how thermoforming works, its key advantages, common materials, and how it compares with injection molding.
- Custom design flexibility: Thermoformed packaging can incorporate product-specific contours, compartments, supports, and stacking or nesting features.
- Material versatility: Common thermoforming materials include HDPE, polypropylene, ABS, PET, polystyrene, and PVC, with material selection based on the application.
- Durability and reuse: Custom thermoformed packaging can be designed for repeated handling, storage, and transportation while helping protect products in transit.
- Efficient handling: Purpose-built designs can support better stacking, storage, organization, loading, and unloading.
When a product is large, delicate, unusually shaped, or simply doesn’t fit standard packaging, protecting it during storage and transportation can be a challenge. Trying to make an off-the-shelf container work may leave too much room for movement or fail to support the product where it needs protection most.
That’s where custom thermoformed plastic containers can make a difference.
Thermoforming makes it possible to create plastic packaging around the size, shape, and requirements of a specific product. From custom trays and containers to packaging with specialized contours and compartments, thermoformed plastic can provide a durable, practical solution for protecting products throughout handling and transport.
Let’s look at the advantages of custom thermoforming and what businesses should consider when choosing a plastic manufacturing process.
What Are Custom Thermoformed Plastics?
Custom thermoformed plastics are plastic parts, trays, containers, and other products shaped to meet specific design requirements. Unlike an off-the-shelf solution with predetermined dimensions, custom thermoforming allows the finished product to be designed around a particular size, shape, or application.
The thermoforming process starts with a flat sheet of plastic. The sheet is heated until it becomes pliable, then formed over or into a mold to create the desired shape. Once the plastic cools and holds its new form, the finished part is trimmed and completed as needed.
What makes custom plastic thermoforming especially useful is the control it provides over the finished design. Dimensions, contours, compartments, and other functional features can be incorporated to create a solution suited to how a product will be protected, stored, handled, or transported.
That design flexibility is one of the key advantages of custom thermoformed plastics—and it’s where we’ll start.
1. Design Flexibility for Unique Product Requirements
One of the biggest advantages of custom thermoformed plastic is right there in the name: it can be customized.
Instead of trying to make a product fit a standard container or tray, thermoformed packaging can be designed around the product itself. That can be especially valuable for big, small, delicate, or uniquely shaped products that require more than a generic packaging solution.
Depending on the application, a custom design can incorporate features such as:
- Product-specific dimensions and contours
- Individual compartments
- Dividers and product separation
- Supports for specific areas of a product
- Nesting and stacking features
- Handles and other handling features
The goal is simple: make the packaging fit the product instead of making the product fit the packaging.
This flexibility also means the packaging can account for more than dimensions alone. How a product is loaded, stored, moved, stacked, transported, and unloaded can all be considered during the design process.
2. Material Options for Different Product Needs
The design of custom plastic packaging matters, but so does the material used to make it.
Different thermoplastic materials have different characteristics. Depending on the application, manufacturers may consider factors such as rigidity, flexibility, weight, surface characteristics, expected handling, and the environment the packaging will encounter.
Some common thermoforming materials include:
- High-density polyethylene (HDPE): A durable plastic commonly used for applications that require toughness and impact resistance.
- Polypropylene (PP): A lightweight thermoplastic that offers flexibility and is used for a variety of packaging and product applications.
- Acrylonitrile butadiene styrene (ABS): A rigid, impact-resistant plastic often used when strength and a durable finished surface are important.
- Polyethylene terephthalate (PET): A versatile plastic commonly used for packaging applications, including products where clarity may be desired.
- Polystyrene (PS): A lightweight, rigid material that can be thermoformed into a variety of shapes and packaging products.
- Polyvinyl chloride (PVC): A versatile thermoplastic that can be formulated with different levels of rigidity or flexibility for various applications.
The right material depends on what the finished product needs to do. For example, a packaging solution that needs to support a heavy or unusually shaped product may have different requirements than a tray designed to organize smaller components.
That flexibility gives businesses the opportunity to consider both material and design when developing a custom thermoformed solution. Rather than treating the material as an afterthought, it can become part of the overall packaging strategy.
3. Durable Protection During Handling and Transport
Packaging has an important job to do between Point A and Point B.
Products may be loaded, unloaded, moved, stacked, stored, and transported before they reach their destination. Each step creates another opportunity for unwanted movement, contact, or damage.
Custom thermoformed plastic packaging can be designed to help keep a product positioned and supported throughout these processes. Product-specific contours, compartments, and support points can help limit movement and keep vulnerable areas from making unwanted contact with surrounding products or surfaces.
The result is packaging designed around safer, more reliable handling and transportation.
4. Built for Reuse
Depending on its material, design, and application, a durable thermoformed packaging solution can be designed for repeated use.
That’s an important advantage for businesses with products that regularly move between facilities, suppliers, customers, or other points in a supply chain. Instead of treating the packaging as something used for only one trip, reusable plastic packaging can become part of an ongoing material-handling system.
A reusable solution can be designed with repeated loading, unloading, handling, storage, and transportation in mind.
When talking about re-use, we are often asked, “can thermoformed plastic be reshaped?”
A finished thermoformed product generally isn’t intended to be reheated and reshaped between uses. Doing so could affect its dimensions, fit, or other characteristics.
When we talk about reusable products, we’re referring to reusing the finished packaging for its intended purpose—not repeatedly forming it into a new shape.
5. Efficient Stacking, Storage, and Handling
Good packaging shouldn’t only protect the product. It should also work with the way the product is handled.
Because custom thermoforming offers control over the shape of the finished product, designers can consider how containers and trays will function throughout storage and transportation.
Depending on the product and application, a custom design may incorporate features that support:
- Stacking
- Nesting
- Organized storage
- Product separation
- Loading and unloading
- Easier handling
- Product identification
For example, nestable packaging requires less space when empty. Stackable designs create a solution that is more organized for storage or transportation.
The best solution will depend on the specific needs for each product, but the advantage of thermoforming is the ability to think beyond product protection alone. Custom plastic packaging can be designed around the entire handling process.
What Are the Disadvantages of Thermoforming Plastic?
Thermoforming offers significant design flexibility, but that doesn’t mean it’s the right manufacturing process for every plastic product.
Some potential limitations of thermoforming include:
- Complex geometry: Certain intricate shapes, features, or part geometries may be better suited to another plastic manufacturing process.
- Material thickness: Because a plastic sheet stretches as it forms around a mold, wall thickness may vary throughout the finished part. Good part and mold design must account for this.
- Trimming requirements: Thermoformed parts typically require trimming after forming, which can create excess material.
- Application-specific limitations: Part geometry, material requirements, production needs, and intended use can all affect whether thermoforming is the appropriate choice.
These aren’t necessarily reasons to avoid thermoforming. They are reasons to evaluate the product and its requirements before choosing a manufacturing process.
Custom Plastic Thermoformed Packaging Solution with Peninsula Plastics
The biggest advantage of custom thermoformed plastics is the ability to create a solution around a specific product. Custom plastic packaging can address challenges that standard packaging simply wasn’t designed to solve.
Need a custom molded plastic solution for your application? Count on us for your custom plastic injection molding services!
