Heat-resistant coating 

When changing the structure of a package, the melting point of the film may decrease, which can lead to reduced production efficiency during bag making. The Z327 Heat-Resistant Coating helps address this issue by expanding the heat-sealable temperature range by approximately 20°C, contributing to improved packaging productivity.

• Features
• Physical properties

Features

When modifying packaging structures—such as in the shift toward mono-materialization—the melting point of the film may decrease. This can lead to issues during bag making, such as heat shrinkage, curling, film breakage, and adhesion to the heat-sealing bar.
Typically, these issues are addressed by lowering the heat seal temperature, but doing so also slows down the bag-making speed, resulting in a decline in production efficiency.
By printing the Z327 Heat-Resistant Coating on the outermost film layer, the heat-sealable temperature range can be expanded by approximately 20°C, contributing to improved productivity in the packaging process.

Mono-Material Solutions

Physical properties

Heat Shrinkage Evaluation (Simplified Test)

Under a sealing time of 1 second, without using the coating agent, the film stretches at a sealing temperature of 130°C and breaks at 140°C.
In contrast, when using the Z327 Heat-Resistant Coating, heat sealing can be performed without any issues even at 150°C.

【Evaluation Conditions】
Structure: Z327 Heat-Resistant Coating / MDOPE (25 µm) / Ink / Adhesive / LLDPE (50 µm)
Sealing Temperature: 120–150°C, Sealing Pressure: 2 kgf/cm²
Sealing Time: 1 s

Heat Shrinkage Evaluation (Actual Equipment Test)

Under conditions of 125 ms × 4 sealing time, the film breaks at 240°C when the coating agent is not used.
In contrast, when using the Z327 Heat-Resistant Coating, heat sealing can be performed without issues even at 260°C.

【Evaluation Conditions】
Structure: Z327 Heat-Resistant Coating / MDOPE (25 μm) / Ink / Adhesive / LLDPE (100 μm)
Production Speed: 193 shots/min
Sealing Temperature: 240–270 °C,Sealing Time: 125 ms × 4
Seal Bar Protection: Teflon
* Evaluation conducted using a bag-making machine owned by Totani Giken Kogyo Co., Ltd.