How to distinguish PVC film from PP film

PVC film  and  PP film  are two common types of thin film materials that are widely used in various fields such as packaging, printing, construction, and industrial applications. Although they may appear similar in appearance, there are some differences in their physical properties, chemical properties, and application areas. Here is a detailed comparison of PVC film and PP film, which I hope will be helpful to you.

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Comparison of Physical Properties:

Transparency: PVC film usually has good transparency, providing high-definition display effects. On the other hand, PP film tends to be more opaque with lower transparency.

Hardness: PVC film is relatively rigid and has strong scratch resistance. PP film, on the other hand, is relatively flexible and easy to bend and fold.

Density: PVC film has a higher density, typically ranging from 1.3 to 1.45 g/cm³. PP film, on the other hand, has a lower density, around 0.9 to 0.91 g/cm³.

Weather resistance: PVC film has good weather resistance, able to withstand the impact of factors like UV radiation, oxidation, and corrosion. PP film, relatively, has poorer weather resistance and is more susceptible to damage from UV radiation.

Combustibility: PVC film releases toxic gases, such as hydrogen chloride, when it burns. PP film has good flame retardant properties and does not produce toxic gases when burning.

Comparison of Chemical Properties:

Chemical resistance: PVC film has good chemical resistance, showing resistance to acids, alkalis, salts, solvents, and other substances. PP film also has some acid and alkali resistance, but its chemical stability is weaker and it is more prone to erosion by organic solvents.

Processability: PVC film can be processed through methods like thermal molding and vacuum forming to create products of various shapes and sizes. PP film can be processed through methods like injection molding, extrusion, and blow molding.

Printability: PVC film has a smooth surface, making it suitable for various printing methods such as screen printing, offset printing, and heat transfer printing. PP film, with a relatively rough surface, yields poorer printing results.

Weldability: PVC film can be joined through techniques like hot pressing and ultrasonic welding. PP film also has good welding performance, suitable for processes like heat sealing and high-frequency welding.

Comparison of Application Areas:

Packaging: PVC film is commonly used in food packaging, pharmaceutical packaging, and daily necessities packaging, such as transparent plastic bags, plastic bottles, and plastic boxes. PP film is often used in industrial packaging, electronics packaging, and the like, such as plastic tapes and packaging boxes.

Printing: PVC film is suitable for high-quality graphic printing and is commonly used for posters, advertising banners, etc. PP film is suitable for simpler printing needs like text and logos.

Construction: PVC film is frequently used for building cladding, ceilings, partitions, etc., with good waterproof performance. PP film is often used for interior decoration, furniture surface laminating, etc.

Industrial: PVC film can be used for insulation layers of wires and cables, synthetic leather, pool liners, etc. PP film can be used for battery separators, filters, corrosion-resistant materials, etc.

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Distinguishing between PP film and PVC film in decoration

In home decoration, PVC film and PP film also have different applications. Generally, PVC film is commonly used for furniture surface wrapping, flooring materials, etc. Due to its higher hardness, it provides better wear resistance and scratch resistance, and it is also easy to clean and maintain. PP film is often used for wall decorations. With its relative flexibility, it can be shaped to fit curved surfaces through heating, resulting in a smoother and more attractive appearance. Additionally, PP film has better flame retardant properties, which can enhance home safety. Therefore, the selection of PVC film or PP film in home decoration depends on specific requirements and material performance.

In summary, PVC film is more transparent, harder, has better weather resistance and chemical resistance, but produces toxic gases when burning. PP film is relatively flexible, has lower density, good flame retardant properties, but lower transparency and susceptibility to UV radiation. In terms of application areas, PVC film is mainly used in food packaging, printing, and construction, while PP film is commonly used in industrial packaging and interior decoration. The choice between PVC film and PP film depends on specific application needs and material performance.