Polyethylene Cap Manufacturing
Polyethylene (PE) remains the material of choice for pharmaceutical and industrial closures due to its chemical inertness, flexibility, and cost-effectiveness. We produce both HDPE and LDPE caps in DIN standard formats using multi-cavity high-speed moulds.
PE caps offer excellent stress-crack resistance, making them ideal for products containing surfactants, solvents, and essential oils that would degrade other plastics.
HDPE vs LDPE Selection
HDPE provides rigidity and snap-fit performance for tamper-evident closures. LDPE offers flexibility for squeeze-to-open and dispensing caps. We help clients select the optimal grade based on opening torque requirements, dispensing method, and chemical compatibility with their product.
Production Process
Our PE cap production runs on dedicated electric presses with 16-32 cavity hot-runner moulds. Unscrewing cores produce the internal thread; cam-actuated slides form the tamper-evident band. Cycle times of 3-5 seconds deliver competitive unit costs for volumes from 50,000 to 50 million units.
Quality System
ISO 9001:2015 certified. Inline torque testing, dimensional vision inspection, and seal integrity testing on every production run. Material certificates provided with each batch. Cleanroom-packaged options available for pharmaceutical clients.
Applications
Pharmaceutical bottles, essential oil vials, chemical reagent containers, cleaning product bottles, food packaging, and laboratory consumables.
Frequently Asked Questions
What chemical resistance does PE offer?
PE is resistant to most acids, alkalis, alcohols, and surfactants. It is not recommended for aromatic solvents (toluene, xylene) or chlorinated solvents. We provide chemical compatibility testing for specific product formulations.
Can PE caps be produced in colours?
Yes, any colour including transparent (LDPE). Masterbatch colouring ensures batch-to-batch consistency. FDA-compliant pigments for food and pharma applications.
Technical Specifications
Material: HDPE/LDPE | Formats: DIN 18, 20, 22, 28 | Mould: 16-32 cavity | Cycle: 3-5s | Chemical resistance: excellent | Certifications: ISO 9001, FDA, EU 10/2011