Extrusion Lamination｜Sanyo Kakoshi Co., Ltd.

Extrusion lamination is a processing method in which molten resin is extruded in a film form onto a substrate (base material), then cooled and bonded. Because the resin itself adheres directly to the substrate, no adhesive is required, resulting in lower environmental impact and making it easier to achieve stable product quality.

At Sanyo Kakoshi, we achieve multifunctionality through co-extrusion technology, in which two different resins are simultaneously extruded from a single extruder.

Feature
01

Reduction of Pinholes

Since a thick and uniform resin layer can be formed, pinholes—commonly seen in thin coating processes—are less likely to occur, enabling excellent barrier performance.

Feature
02

High Productivity and Cost Efficiency

Compared with other manufacturing methods such as dry lamination, extrusion lamination enables high-speed mass production, making it possible to manufacture products at lower cost.

Feature
03

Reduced Environmental Impact

Because no adhesives or organic solvents are used, the process is not only highly safe but also produces fewer emissions, reducing environmental impact.

Types of Laminating Resins

Polypropylene (PP)

Polypropylene (PP) is a lightweight yet durable general-purpose plastic with excellent heat resistance, chemical resistance, and processability.

In particular, our proprietary homopolymer polypropylene lamination resin prevents contamination from other materials through specialized processing technology.
This reduces the adhesion of oxidized degradation products and enables stable production of high-quality PP laminated products.

Products Using PP

Release Paper

Polyethylene (PE)

Polyethylene (PE) is the most widely produced general-purpose plastic in the world, derived from petroleum. It offers high strength and excellent chemical resistance, waterproof properties, and cold resistance, making it ideal for packaging materials and construction materials exposed to harsh environments.

Products Using PE

Aluminum Kraft (ALK)

Aluminum Glass Cloth (ALGC)

Barrier Film

Special Grade (TPX® Resin)

Materials that provide special performance not achievable with common resins such as PP or PE are collectively referred to as “special grades.” One of the key materials we handle is TPX® (polymethylpentene) produced by Mitsui Chemicals, Inc.

TPX® has a melting point of 220–240°C, providing extremely high heat resistance along with excellent release properties and transparency. This makes it possible to manufacture release paper of top-class quality within the industry.

Products Using TPX®

Release Paper

Processing Equipment

Single Laminator

Installation Location	Head Office Plant – No.1 Factory	Head Office Plant – No.2 Factory
Extrusion Method	ー	T-die Co-extrusion
Main Raw Material	PE (Polyethylene)	PP, TPX®
Effective Width	800–1,250 mm	1,570–1,710 mm
Defect Detection System	Manufactured by Futec	Manufactured by Futec