Overview
Polyethylene (PE) carrier refers to a form of polyethylene used as a substrate or support material in industrial processes. It is derived from ethylene polymerization and is available in various grades (e.g., HDPE, LDPE) tailored for specific uses. Due to its inertness and mechanical stability, it is widely adopted in chemical, pharmaceutical, and packaging industries. As a thermoplastic, PE carriers can be molded, extruded, or blown into different shapes, making them adaptable for niche applications. Their recyclability and cost-effectiveness further enhance their appeal in sustainable manufacturing.
Physical and Chemical Properties
Polyethylene carriers exhibit a semi-crystalline structure, contributing to their toughness and flexibility. Their density ranges from 0.91 g/cm³ (LDPE) to 0.96 g/cm³ (HDPE), with higher density grades offering greater rigidity. The material melts at 115–135°C but decomposes at temperatures above 300°C. Chemically, PE is resistant to acids, alkalis, and polar solvents, though it may swell in non-polar hydrocarbons. Its low moisture absorption (<0.01%) makes it ideal for humid environments. UV stabilizers are often added for outdoor use to prevent degradation.
Main Applications
In the chemical industry, PE carriers serve as catalyst supports for reactions like polymerization or hydrogenation, leveraging their high surface area and inertness. They are also used to manufacture corrosion-resistant linings for tanks and pipes. The packaging sector relies on PE carriers for films, bottles, and containers due to their barrier properties and lightweight nature. Medical applications include surgical trays and drug delivery systems, where sterility and biocompatibility are critical.
Safety and Storage
While polyethylene is non-toxic and FDA-approved for food contact, processing its dust or fumes may irritate respiratory systems. Adequate ventilation is recommended during machining or heating. Storage should avoid prolonged exposure to UV light or temperatures above 50°C to prevent oxidative degradation. For bulk procurement, PE carriers are typically packaged in moisture-proof bags or drums. Compatibility with other materials (e.g., additives, coatings) should be verified to ensure performance stability.
B2B Procurement Guide
Buyers should specify parameters like melt flow index (MFI), density, and additive content (e.g., antioxidants, pigments) when sourcing PE carriers. Custom formulations are available for specialized needs, such as conductive or flame-retardant grades. Suppliers often provide technical datasheets and compliance certificates (e.g., ISO 9001, REACH). Pricing is influenced by crude oil trends, with bulk orders (20+ metric tons) commonly attracting discounts of 5–15%.
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