Overview
PE master rolls are bulk quantities of polyethylene film wound into large rolls, typically produced through blown or cast extrusion processes. They serve as raw material for downstream conversion into bags, wraps, or laminates. The global market for PE films is driven by demand in food packaging, e-commerce logistics, and agricultural sectors due to their cost-effectiveness and versatility. Polyethylene grades vary: LDPE offers flexibility for lightweight packaging, while HDPE provides rigidity for heavy-duty sacks. LLDPE blends combine puncture resistance with stretchability, making them ideal for stretch films. Master rolls often include additives like UV stabilizers for outdoor use or slip agents for improved processing.
Physical and Chemical Properties
PE films exhibit low density (floats on water) and high elongation at break (100–1,000%). Their chemical inertia makes them resistant to acids, alkalis, and organic solvents, though aromatic hydrocarbons may cause swelling. Oxygen transmission rates range between 1,500–9,000 cc/m²/day, influencing food preservation performance. Thermal properties differ by type: LDPE softens at ~80°C, while HDPE retains shape up to 120°C. All variants become brittle below -50°C. Optical properties range from translucent (high crystallinity HDPE) to nearly transparent (low crystallinity LDPE), with haze values typically 5–20% for standard films.
Main Applications
In packaging, PE master rolls are slit into shopping bags, garment covers, and bubble wrap. Stretch films (30–50 microns) dominate pallet wrapping, while 10–25 micron films serve as bread bags or produce liners. Heavy-duty 80+ micron rolls become construction site vapor barriers. Agriculture utilizes 15–150 micron black/clear mulch films for weed control and moisture retention, accounting for ~25% of Asian PE film demand. Specialty applications include anti-fog films for greenhouse roofing and silage covers with oxygen barrier layers. Emerging uses include biodegradable PE blends with starch for eco-friendly packaging.
Safety and Storage
PE films pose minimal health risks under normal conditions but may release volatile organic compounds (VOCs) when heated above 200°C. Workers handling hot melt adhesives should ensure proper ventilation. Static electricity accumulation during unwinding requires grounding in explosive atmospheres. Storage recommendations include maintaining rolls upright on pallets to prevent deformation. Optimal conditions are <35°C with <60% RH; prolonged UV exposure degrades mechanical properties. Shelf life typically exceeds 12 months if stored properly. Fire hazards are moderate—PE burns with a blue flame and dripping behavior, requiring Class B fire extinguishers.
B2B Procurement Guide
Industrial buyers should specify: 1) Film thickness (microns) and tolerance (±5–10%), 2) Roll dimensions (core ID, max OD), 3) Tensile strength (MD/TD ≥20MPa for standard films), and 4) Additive packages (e.g., antifog for fresh produce packaging). For cost optimization, consider coextruded 3–5 layer films where only surface layers require premium additives. Verify supplier certifications like ISO 9001 and FDA compliance for food contact. MOQs typically start at 5 tons, with lead times of 2–4 weeks for custom formulations. Spot price fluctuations track crude oil trends—contracts with ethylene price indexes help manage budget volatility.
Related Manufacturers
- 主营：橡胶管、耐酸碱、输吸油、胶管带、橡胶垫、吸水管、穿线管、硅胶管、橡胶软管、疏浚胶管、橡胶钢丝、水泵软管、橡胶衬套、胶管阻燃、编织胶管、胶管水泵、耐磨法兰、橡胶定制、喷砂软管、大口径钢丝胶管、耐温蒸汽胶管、陶瓷耐磨胶管、石棉阻燃胶管
- 主营：穿线管、化工管、卷芯管、pe卷芯管、走水管、给水管、排污管、挡板支架、雨污排水管、污水排出管道
- 主营：pvc自粘、保鲜膜、电线膜、蔬菜水果pe、pe塑料薄膜、环保机、拉伸膜、缠绕膜、捆包青贮、餐盒打包、青储饲料、防潮收缩膜、蔬菜捆菜扎、鞭炮包装膜、拉伸塑料薄膜、镀锌钢丝鼻梁、透明塑料薄膜
- 主营：缠绕膜、塑料袋、气泡袋、pe气泡膜、加厚气泡膜
- 主营：纸箱带、箱打包、纸托盘、保护膜、纸板箱、珍珠棉、pvc电线、卡通箱、搬家箱、承重箱、化妆品、护角条、护角板、盒纸箱、包装盒、快递纸、pvc塑料、纸栈板、纸包角、飞机盒、纸护角、纸箱aaa、纸卡板、收缩膜、拉伸膜
- 主营：造粒机、塑料胶条机、仿藤篮子挤出机、仿藤机、收卷机、牵引机、挤出机、塑料挤出机、裁切机、裁断机、塑料收卷机、胶条收卷机、收卷设备、仿藤机器、仿藤设备、胶条挤出机、管材机、管材挤出机、行星机、胶条挤出设备、胶条设备、皮带牵引机、双收卷机、单收卷机、吸管挤出机
- 主营：屏幕保护膜、共挤膜、低粘膜、pet膜、pet保护膜、pet原膜、硅胶pet、黑丝pet、功能性pe、pet离型膜、保护膜、硅胶保护膜、装饰板、流延膜、减粘膜、cpp保护膜膜、耐高温保护膜、PE保护膜、离型膜、热转印膜、封箱胶带、静电保护膜、锂电池保护膜
- 主营：化工管、卷芯管、走水管、排水管、穿线管、塑料管、纸管堵头、排污管道、废气通风管、缠绕膜管、车衣管
- 主营：拉伸膜机、缠绕膜机、流延膜挤出机、大母卷流延膜挤出机、风冷造粒机、水环切造粒机
- 主营：热熔胶、保护膜、3m9448hkb、pet胶带、pet双面、eva泡棉、tesa51026、无纺布、51136tesa、保险杠、软木带、eva背胶、纸胶带、替代品、封口机、板电镀、vhb胶带、美纹纸、模切冲、聚乙烯、双面胶、no.57115sb、4174胶带、4657胶垫、tesa胶带