What is BOPP?
BOPP film is widely used in packaging, labeling, and other applications due to its excellent clarity, high tensile strength, moisture resistance, and dimensional stability.
High tensile strength
Moisture resistance
High barrier
Good dimensional stability
Poor oxygen resistance
Widely used for printing
BOPP Series
KOPP: For confectionery pakaging
TOPP
Subsequently, in a specialized stretching machine, the material undergoes simultaneous or stepwise stretching in two perpendicular directions at predetermined temperatures and speeds.
Finally, the film is subjected to appropriate cooling, heat treatment, or special processes (such as corona treatment, coating, etc.) for final processing.
The Advantages of BOPP Films
- BOPP film is colorless, odorless, tasteless, and non-toxic, it can be directly used in contact with both food and pharmaceuticals.
- Due to the directional effect of the molecules, it possesses high tensile strength, impact resistance, rigidity, and toughness.
- Excellent transparency, good gloss.
- The surface energy of BOPP film is low, and corona treatment is required before coating or printing.
After corona treatment, BOPP film exhibits excellent printing adaptability, allowing for high-quality multi-color printing and achieving a beautiful appearance.
Therefore, it is commonly used as the surface layer material for laminate films.
- It has good barrier properties and moisture resistance.
The Weakness of BOPP Films
- BOPP film is prone to static electricity accumulation and lacks heat-sealing properties.
On high-speed production lines, BOPP film is susceptible to static electricity, requiring the installation of static eliminators.
- The initiation tear strength of BOPP film increases after stretching, but the secondary tear strength is low.
Therefore, there should be no cuts or notches on both ends of the BOPP film surface. Otherwise, the film is prone to tearing during printing or lamination.
- BOPP film has a lower elongation rate compared to PP, and its heat-sealing performance is inferior.
It is not easy to seal independently, so it is commonly combined with films like PE that exhibit good heat-sealing properties when used.
Classification and Usages of BOPP Films
- BOPP Flat Film: Generally used for printing, bag making, adhesive tapes, and composite with other substrates.
Its characteristics include good uniformity, high strength, high transparency, low heat shrinkage, low moisture permeability, and moderate corona treatment.
- BOPP Matte Film: The matte film is made by unidirectional stretching of matte masterbatch in a single layer, mainly used for the lamination of books, journals, annual report covers, cardboards, etc.
It is also used in various packaging when combined with polyethylene film, cast polypropylene film, BOPP film, pearl film, metalized film, etc.
- BOPP Pearlized Film: Used for the packaging of printed food and household items.
It features excellent heat-sealing strength, outstanding UV barrier properties, a high-grade appearance with pearl luster, and high barrier properties.
- BOPP Heat Sealable Film: Mainly used for printing and bag making.
In addition to the characteristics of ordinary transparent film, it also has low-temperature heat-sealing properties, low friction coefficient, and low moisture permeability.
- BOPP Tobacco Film: Used for high-speed cigarette packaging.
Although the overall usage volume is not large, it is the most profitable product in the BOPP film. The production and sales of tobacco film have high technical requirements and significant entry costs.
- BOPP Synthetic Paper: A new type of plastic material and an environmentally friendly product.
It has the characteristics of lightweight, high strength, tear resistance, good printability, light-shielding, UV resistance, durability, and economic and environmental protection.
- BOPP Aluminum Coated Film Substrate: Mainly used for vacuum packaging of flavored foods, agricultural products, as well as packaging for pharmaceuticals, cosmetics, and cigarettes.
Additionally, aluminum-coated films are widely used as hot stamping materials and label materials in printing.
- BOPP Holographic Film (Laser Embossed Film): Features clear embossing, good imaging, and excellent transparency.
It is widely used in anti-counterfeiting packaging for mobile communication cards, brand-name tobacco, alcohol, pharmaceuticals, etc.
- BOPP Capacitor Film: Mainly used in the electronics field for AC motors, household appliances, power capacitors, etc. It is a top-tier product among BOPP film types.
- Other Varieties of Film: The production volume of other film varieties is currently limited and awaits further market development.
These include BOPP drawstring film, BOPP twist film, BOPP release film, BOPP wrapping film, etc.
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