Expert guide to HDPE extrusion blow moulds for chemical containers in India — from acid storage cans to industrial solvent containers and UN-approved dangerous goods packaging.
India's chemical industry is the world's sixth largest, with annual output exceeding ₹10 lakh crore. Chemical manufacturers — from Ahmedabad's Ankleshwar GIDC to Vapi's chemical belt, Hyderabad's pharma cluster to Pune's industrial zone — require billions of chemical containers annually. HDPE (High-Density Polyethylene) is the material of choice for most chemical containers because of its outstanding chemical resistance, stiffness, and impact strength.
Ultra Mould manufactures HDPE extrusion blow moulds for chemical containers of all sizes and types — from 500ml acid bottles to 25-litre UN-approved dangerous goods containers. Our moulds are used by chemical manufacturers, agrochemical companies, lubricant brands, cleaning product manufacturers, and industrial fluid packagers across India and 20+ countries.
Certain chemical containers require UN (United Nations) certification for transport of dangerous goods. UN 31HA1 certification (for solid chemicals) and UN 31HA2 (for liquids) specify minimum performance standards including drop test (1.2m), stacking test, and leakproofness test. Ultra Mould designs containers and moulds that are pre-validated for UN certification, and can assist clients with the testing and certification process through accredited testing labs.
Not all HDPE grades are equally resistant to all chemicals. Standard HDPE (density 0.952 g/cc) offers excellent resistance to dilute acids, alkalis, alcohols, and most mineral oils. However, concentrated organic solvents (toluene, xylene, cyclohexane) can permeate standard HDPE. For aggressive solvents, we recommend HDPE with fluorine treatment (F-treatment) of the inner surface — a post-blow moulding process that dramatically reduces permeation.
💡 Always test your specific chemical with a sample bottle before full production. Ultra Mould can supply sample bottles for your chemical compatibility testing at no additional charge.
Chemical containers require heavier wall thickness than edible oil or water containers. Our design guidelines for chemical containers: 500ml containers minimum 1.0mm, 1–5L containers minimum 1.5–2.0mm, 10–25L containers minimum 2.5–3.5mm. Handles and bung necks require additional reinforcement ribs in the mould design.
Ultra Mould has been supplying HDPE chemical container moulds to India's chemical and agrochemical industries for over 10 years. Contact us for a free consultation on your chemical packaging project.
Tell us your chemical type, container volume, and production scale. We will recommend the ideal HDPE grade and mould design.