Custom Poly Liners
Custom Polyethylene Liners for Food, Agricultural & Industrial Packaging
California Plastix manufactures custom poly liners for food processors, manufacturers, distributors, agricultural operations, co-packers, and industrial customers. Our box liners, drum liners, food processing liners, bin liners, and industrial poly liners are custom-engineered to customer specifications, including dimensions, gauge, material selection, and food-contact requirements.
With in-house manufacturing in Pomona, California, we support customers throughout California and across the United States with production consistency and recurring supply programs.
What Are Poly Liners?
Poly liners are polyethylene bags fitted inside a container to create a barrier between the contents and the outer packaging. They help protect products from moisture, dust, and handling exposure while keeping contents contained during packing, storage, and distribution.
Unlike a stock liner chosen only by a nominal container size, a custom liner is specified around the actual container dimensions, product characteristics, filling process, and closure needs. Flat or gusseted construction, resin selection, and film gauge work together to provide the appropriate fit and performance.
Food-grade poly liners and industrial poly liners serve different operating conditions. Our team helps translate those requirements into a repeatable polyethylene liner specification for your packaging program.
Types of Poly Liners
Box liners, drum liners, food processing liners, bin liners, and industrial poly liners are application-specific types within our custom poly liner manufacturing program. Each is manufactured to order around your container and contents, rather than positioned as a stock product.
Box Liners
Custom polyethylene liners sized for boxes and cartons used in food processing, agricultural packing, manufacturing, and distribution. Dimensions and gusset depth are specified to fit the container, accommodate the contents, and allow the required closure.
Drum Liners
Polyethylene liners manufactured to fit drums used in food processing and industrial operations. Each liner is specified around the drum dimensions, contents, filling method, and handling requirements; food-contact material options are available where required.
Food Processing Liners
Custom liners for food processing, ingredient handling, and packaging operations. Dimensions, gauge, and FDA-compliant virgin resin options are specified around the contents, food-contact requirements, and filling and storage conditions.
Bin Liners
Polyethylene liners custom-sized for bins used in agricultural handling, food processing, and manufacturing. Flat or gusseted constructions are engineered to the bin dimensions and material containment requirements.
Industrial Poly Liners
Application-specific liners for industrial manufacturing, material containment, and product protection. Material selection and film gauge are matched to the contents, container surfaces, and handling conditions.
Custom Poly Liner Manufacturing
Every liner program starts with your product, container, and process. We review the dimensions, product weight and shape, filling method, storage conditions, and food-contact requirements before selecting the liner construction, material, and gauge.
- Custom widths, lengths, and gusset dimensions
- Application-specific film gauges
- LDPE and LLDPE material selection
- Flat or gusseted constructions
- Food-contact material requirements
- Freezer-grade and heavy-duty options
As a custom poly bag manufacturer, California Plastix controls film extrusion, flexographic printing, and bag converting in-house at our Pomona facility. This supports quality control from film production through the finished liner. Explore our manufacturing capabilities.
Most customers rely on California Plastix for ongoing supply programs where production consistency, dependable lead times, and repeatable quality are critical to day-to-day operations.
Features & Benefits
- Engineered to fit your container and filling process
- Protective barrier between contents and outer packaging
- Consistent dimensions and gauge across recurring orders
- Material selection matched to handling conditions
- FDA-compliant virgin resin available
- Heavy-duty and freezer-grade options
- Custom printing for product identification
- Made in the USA
Product Specifications
| Specification | Details |
|---|---|
| Application Types | Box liners, drum liners, food processing liners, bin liners, industrial poly liners |
| Materials | LDPE, LLDPE — selected for application requirements |
| Thickness | Custom gauges from 1–8 mil |
| Dimensions | Custom-engineered to container and product specifications |
| Construction | Flat or gusseted |
| Options | High-clarity, heavy-duty, freezer-grade, and custom printing |
| Manufacturing | Pomona, California — Made in the USA |
Food Contact Compliance
FDA-compliant virgin resin is available for direct food-contact applications.
Food-grade poly liners can be specified for food processors, ingredient handlers, agricultural packers, and co-packers. Food-contact suitability is part of the material selection process, not a claim applied to every liner regardless of use.
Share your product, contact conditions, filling and storage temperatures, and documentation requirements. Our team will recommend an appropriate resin, gauge, and construction for the application.
Common Applications
Food Processing & Ingredients
Custom food processing liners, box liners, bin liners, and drum liners for ingredient handling and food packaging programs where container fit and food-contact material selection matter.
Agriculture & Produce
Polyethylene liners for agricultural packing, handling, and distribution, specified around the product, container, and storage conditions.
Industrial Materials & Components
Industrial poly liners for manufactured goods, components, and materials requiring separation from outer packaging and protection during handling.
Distribution & Co-Packing
Repeatable liner specifications for packaging distributors, co-packers, and operations managing recurring packing and replenishment requirements.
Material Containment
Custom polyethylene liners specified to keep materials contained within boxes, bins, and drums during packing, storage, and handling.
Product Protection
Application-specific film materials and gauges help separate products from outer container surfaces and protect against moisture, dust, and handling exposure.
For packaging outside a lined container, explore lay flat bags and gusseted bags. For continuous film requirements, see our poly films.
Industries Served
- Food processors
- Industrial manufacturers
- Packaging distributors
- Agricultural operations
- Produce packers
- Co-packers and contract packagers
- Ingredient suppliers
- Distribution and logistics operations
The California Plastix Advantage
Direct Manufacturer
In-house extrusion, flexographic printing, and converting support quality control throughout production.
Production Consistency
Repeatable dimensions, material selection, and gauge specifications across recurring liner orders.
Recurring Supply Programs
Manufacturing-focused support for ongoing packaging needs, replenishment planning, and dependable supply.
Application-Specific Engineering
Liners specified around the container, contents, handling conditions, and food-contact requirements.
Southern California Manufacturing
Manufactured in Pomona, California, supporting customers throughout California and across the United States.
Responsive Technical Support
Work directly with a packaging team that can help select resin, gauge, and construction for your operation.
Frequently Asked Questions
What are poly liners used for?
Poly liners provide an inner packaging barrier in boxes, bins, and drums. They are used in food processing, packaging, industrial manufacturing, and agricultural operations for material containment and product protection, including separation from the outer container and protection from moisture, dust, or handling exposure.
What types of custom poly liners do you manufacture?
California Plastix manufactures box liners, drum liners, food processing liners, bin liners, and industrial poly liners. These are application-specific types within our custom poly liner program, engineered to customer specifications rather than offered as stock products or separate product categories.
Can poly liners be made to custom dimensions?
Yes. Liner width, length, gusset dimensions, and film gauge are selected around your container, product, filling process, and closure requirements. Share container measurements and your application with our team so we can specify the appropriate fit.
What materials are available for polyethylene liners?
LDPE and LLDPE are available. Material selection depends on the clarity, flexibility, strength, puncture resistance, handling conditions, and food-contact requirements of the application.
Are food-grade poly liners available?
Yes. FDA-compliant virgin resin is available for direct food-contact applications. Tell us about the contents, contact conditions, storage temperature, and any documentation requirements so the liner can be specified for your use.
How do I choose the right liner gauge?
Gauge depends on the product weight, shape, filling method, container surfaces, and handling conditions. We manufacture custom gauges from 1–8 mil and help match material and thickness to the application rather than selecting thickness alone.
Can liners be manufactured in flat or gusseted constructions?
Yes. Flat and gusseted constructions are available. Gussets provide expansion to accommodate container depth, while flat liners may suit applications that do not need that additional volume. The appropriate construction depends on container fit and packing requirements.
Are freezer-grade and heavy-duty liners available?
Yes. Freezer-grade films and heavy-duty gauges are available. Share the intended storage temperature, contents, and handling conditions so our team can recommend the appropriate material and gauge.
Can you support recurring liner supply programs?
Yes. California Plastix supports recurring manufacturing programs for food processors, manufacturers, distributors, agricultural operations, co-packers, and industrial customers. We focus on repeatable specifications, production consistency, and dependable supply planning.
Where are your poly liners manufactured?
Our poly liners are manufactured in Pomona, California, with in-house film extrusion, flexographic printing, and bag converting. We serve customers throughout California and across the United States.
Explore Related Products
For line-fed packaging, explore wicket bags. For products requiring repeated access, see our zipper bags.
Build a Reliable Poly Liner Program
Share your container dimensions, contents, handling conditions, food-contact requirements, and annual usage. Our team will recommend the right liner specification for your operation.