BOPET Heat Sealable Film For Freshness Seal

Jincheng's China BOPET Heat Sealable Film for Freshness Seal offers four mainstream industrial thicknesses of 15μm, 25μm, 30μm, and 40μm. The transparent version has high transparency for visual inspection, while the aluminum-coated version has light-blocking, oxygen-blocking, and moisture-proof high barrier properties. It uniformly adopts dual-sided differential corona treatment. The inner corona surface has a stable resistance of 52-54 dynes, suitable for printing and dry composite processes. The non-corona surface has a resistance of 42-46 dynes, and the winding is smooth without adhesion.

The formula has been specially improved for heat sealing, featuring a wide and stable heat sealing temperature control range, suitable for various fully automatic and semi-automatic heat sealing sealing equipment. The heat sealing layer is evenly distributed, and the seal has no holes or local detachment. The entire process is produced using food-contact grade virgin polyester raw materials, without harmful emissions. It covers sealing needs in multiple fields such as food, cosmetics, medicine, and industrial composites. It is equipped with five packaging solutions: simple packaging, horizontal/vertical pallets, suspended protective pallets, and export moisture-proof pallets. It also caters to both domestic factory mass production and cross-border foreign trade order delivery.

All-scenario application uses

1. Food preservation and sealing field

2. Cosmetics and beauty products small packaging

3. Pharmaceuticals and health supplements sealing packaging

4. Industrial multi-layer composite substrates

Factory standard performance test

1. Stability test of heat sealing temperature range

Continuous heat sealing test under simulated market mainstream sealing machine temperature control range, the film can form uniform sealing within a wide temperature range, with no edge sticking at low temperatures and no breakdown at high temperatures. There will be no local sealing failure or pinhole leakage. It is suitable for small and medium-sized processing factories with large temperature control fluctuations of the equipment.

2. Seal strength test of film separation

Tensile peel test at the sealing part of BOPET Heat Sealable Film For Freshness Seal. The sealing bond strength is high, and it can only be separated by applying external force. It meets the "difficult to peel" requirement for preserving freshness; the sealing section has no layer separation, no local weak adhesion areas, and the sealing force of the entire roll of film is uniform, without head and tail performance deviations.

3. Long-term stability test of double-sided corona effect

Sampling and detection of dielectric constant values at multiple points on the head, middle section, and tail of the roll material. The values are stable with no significant fluctuations. After static storage at room temperature for 6 months and retesting, the corona attenuation amplitude is extremely small. After long-term storage, the printing and composite adhesion still meet the standards, and there is no performance loss risk in inventory preparation.

4. Layered detection of barrier performance

Water vapor and oxygen permeability test of aluminum-coated heat seal film. The aluminum layer is dense without leakage of coating, and the light-blocking rate is close to 100%. It effectively blocks light, moisture, and oxygen. Compared with the transparent model, it can significantly improve the antioxidant ability of food and cosmetic products. The transparent model has uniform light transmission without crystal points, and does not affect the display of printing colors.

5. Continuous production durability test

24-hour continuous film running test with the fully automatic sealing machine. The film surface tension is uniform, the material feeding is smooth without deviation or sticking to the heat sealing mold, there are no film breakage, mold sticking, or edge wrinkling problems, which significantly reduces the production waste rate of the factory and is suitable for large-scale assembly line operations.

Operating and Storage Safety Precautions

1. Temperature Matching Specifications for Heat Sealing Equipment

Adjust the sealing machine temperature according to the film thickness: 15μm/25μm for thin films, which is suitable for the low-temperature range; 30μm/40μm for thick films, where the sealing temperature should be appropriately increased; Do not allow prolonged continuous high-temperature heat pressing to avoid the sealing layer melting and breaking, resulting in leakage.

2. Usage Requirements for Front and Back Sides

The side used for heat sealing and sealing is the heat sealing functional layer, while the other side is the corona printing surface. Before operation, check the label of the roll material; Do not reverse heat seal; otherwise, there will be problems such as complete non-adhesion and sealing failure.

3. Storage Environment Maintenance Requirements

Store in a dry, ventilated, and cool warehouse, with environmental humidity controlled at 40%-65%. Keep away from high-temperature heat sources and direct sunlight; Stack the rolls upright and prohibit large-area heavy pressure stacking to prevent the sealing layer from being stuck and the film surface from deforming.

4. Usage Specifications for Food/Pharmaceutical Packaging

BOPET Heat Sealable Film for Freshness Seal is only used as an outer packaging and inner layer composite sealing substrate; Do not directly immerse in high-temperature liquids for a long time; When used for food and pharmaceutical packaging, avoid long-term direct contact with strong acids, alkalis, and high-oil materials to ensure packaging safety and compliance.

5. Protection for Overseas Long-Distance Transportation

For overseas shipping orders, priority should be given to using suspended pallets or export moisture-proof pallets for packaging, combined with moisture-proof film, desiccant, and corner reinforcement to avoid moisture condensation during shipping leading to a decline in the sealing layer performance and roll curling and scratching.

6. Suggested Inventory Turnover

The recommended storage period for regular inventory is no more than 6 months; follow the first-in, first-out principle; before operation on rolls that have been stored for more than 6 months, cut a small sample for heat sealing tensile strength testing to confirm stable sealing performance before batch production.