PT, cellophane, or cellulose film, also known as hydrated cellulose film, is a non-thermoplastic film.
Classification: ordinary cellophane, moisture-proof cellophane and coated cellophane.
PT plain cellophane (untreated, transparent).
WST two-sided moisture-proof cellophane.
MT two-side moisture-proof, non-heat-resistant cellophane.
MOT single-sided moisture-proof cellophane.
MOST single-sided moisture-proof, heat-resistant cellophane.
CPT stained cellophane.
LPT low moisture resistant cellophane.
JPT flame resistant cellophane.
HPT does not stick when wet.
Main performance:
A, good printability, no need to go through any processing before printing.
B. It has extremely high transparency and gloss. After printing, the color is extraordinarily bright and dazzling, which is not achievable by other films.
C, non-toxic, tasteless, is the best material for traditional candy packaging.
D, has a certain stiffness, can increase the aesthetics of the package.
E, will not produce biodegradation, buried in the soil, can be decomposed in four months.
AL: Aluminum foil, density 2.7g/cm3, opaque, soft packaging commonly used in soft aluminum foil with a thickness of 0.0065-0.03μm.
Features:
1, good insulation and shading, with metallic luster, good light reflection.
2, heat resistance is very good, high temperature, low temperature shape is stable.
3, not easy to be corroded, good barrier properties, moisture-proof, waterproof, airtight and strong open with aroma.
4, strong protection, so that the packaging is not affected by bacteria, and insects.
5. Good compound adaptability and poor folding resistance.
Uses: Used in other materials for high-grade composite flexible packaging, often used for moisture, oxygen, UV, cooking, food and pharmaceutical packaging. Aluminized film: a thin layer of aluminum powder is deposited on the film material to form an aluminum-plated film, which has the flexibility of the film and the barrier property of the metal, and adds metallic luster to the original film properties. And reflective, light-shielding, enhanced UV, moisture and oxygen.
The structure and function of dry laminating machine
Composition: It consists of unwinding device, coating device, drying device, composite device, winding device, rectification system and tension control system.
1. Unwinding device: The composite substrate is placed to provide the required materials for composite production. It consists of an air expansion shaft, a unwinding frame, a rotation control device, and a winding cutting device. The front and rear unwinding devices are divided.
2, coating device: to provide a uniform, a certain amount of adhesive for the bonding of composite materials. It consists of a rubberized mesh roller, a rubberizing roller, a glue supply system and a blade holder.
3. Drying device: The solvent component in the glue applied on the composite material is removed by circulating hot air. It consists of a blower, an exhaust fan, and a heat pipe box.
4. Composite device: The glued material is combined with another material under a certain temperature and pressure, and cooled and cooled to make the composite film smooth. It consists of hot steel roller, rubber roller and cooling roller.
5. Winding device: The composite film cooled and pasted is taken up into a roll film. It consists of an air expansion shaft, a winding frame, a rotation control device, and a winding cutting device.
6. Tension control device: control the stable operation and stretching of composite materials and composite membranes in production. It consists of a magnetic powder, a sensor, a motor, and a control box. Dispense, dry, and wind tension.
7. Correction device: control the longitudinal running position of the composite material to control the glue position and composite position to meet product requirements. It consists of a detecting head, a correcting motor and a control box.
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