APP

I. Product Overview

Atactic Polypropylene (APP) is a non-crystalline (or low-crystallinity) polypropylene material produced through the stereospecific polymerization of propylene monomers. Unlike common isotactic polypropylene (which has high crystallinity and is used for injection molding, fiber drawing, etc.), the methyl groups in its molecular chain are arranged randomly. This results in exceptional flexibility, high transparency, low heat-seal initiation temperature, and powerful adhesion properties. Consequently, APP is more than just a conventional plastic; it serves as a high-performance modifier, adhesive, and functional layer material, playing an indispensable role in numerous fields.

II. Key Characteristics & Advantages

1. Excellent Adhesion and Compatibility

   · Core Advantage: Possesses outstanding adhesion to a wide variety of both polar and non-polar materials (e.g., polypropylene, polyethylene, metals, paper, textiles).

   · Application Example: A key component in manufacturing composite films, multi-layer co-extruded materials (e.g., CPP, BOPP), and hot-melt adhesives, effectively creating strong bonds between layers of different natures.

2. Superior Flexibility and Impact Resistance

   · Core Advantage: Its random molecular structure confers a soft, pliable nature, significantly enhancing the toughness and low-temperature impact resistance of plastic products.

   · Application Example: Widely used as an impact modifier for polypropylene plastics in applications like automotive bumpers and appliance housings, preventing brittle fracture upon impact.

3. Low Heat-Seal Temperature and High Transparency

   · Core Advantage: Features a relatively low melting point for easy heat sealing, while its non-crystalline structure ensures high clarity in the final product.

   · Application Example: An ideal material for the heat-seal layer in food packaging films and transparent flexible packaging, ensuring strong, fast seals and excellent product visibility.

4. Good Chemical Stability and Water Resistance

   · Core Advantage: Inherits the inherent resistance of the polypropylene family to acids, alkalis, and chemicals, coupled with very low water vapor transmission rates.

   · Application Example: Suitable for chemical product packaging and waterproofing membranes, providing a reliable protective barrier.

5. Eco-Friendliness and Recyclability

   · Core Advantage: As a type of polypropylene, it complies with food contact safety standards and can be recycled alongside the primary polypropylene matrix, supporting sustainable development.

III. Primary Application Fields

1. Packaging Industry

   · Composite Films: Serves as the intermediate bonding layer or heat-seal layer in BOPP/CPP films.

   · Food Packaging: Used in high-speed packaging lines for snacks, confectionery, cigarettes, pharmaceuticals, etc.

   · Heat-Shrink Film: Provides excellent package tightness and appearance.

2. Adhesives and Coatings

   · Hot-Melt Adhesives (HMA): A primary raw material for producing high-performance HMAs, used in bookbinding, woodworking, hygiene products (e.g., diapers), and labels.

   · Waterproofing Membranes: Acts as a tackifying modifier in modified asphalt membranes, enhancing low-temperature flexibility and bond strength.

3. Plastic Modification

   · Toughening Modification: Blended with isotactic polypropylene to significantly improve impact resistance and toughness, used in automotive and appliance components.

   · Wire & Cable Compounds: Modifies insulation and sheathing compounds, improving flexibility and processability.

4. Other Fields

   · Textiles: Used in non-woven fabric production and coating.

   · Cosmetics: Employed in lipsticks, skincare products, etc., to provide desirable texture and stability.