Durable Black Environmentally Friendly Functional Masterbatch

For blown film applications, we typically recommend a dosage of 1% to 3% by total weight of the resin mixture. A 2% addition rate provides the best balance between color depth and material cost for most shopping bags, garbage bags, and courier packaging films. Thinner films (below 12 micron) may benefit from a slightly higher dosage at 2.5% to 3% to ensure complete opacity and consistent black shade throughout the film roll.

Yes, E40 is fully compatible with both virgin and recycled polyethylene resins. The PE carrier resin used in the masterbatch is chemically similar enough to standard LLDPE and LDPE grades that it blends seamlessly without requiring process adjustment. Many of our customers use E40 in blends containing up to 80% recycled PE and still achieve excellent color uniformity.

Absolutely. Carbon black is one of the most effective UV stabilizers available for polyolefin materials. At the 40% loading level in E40, even at a 2% addition rate, the final product will contain approximately 0.8% carbon black — which is well above the threshold needed for meaningful UV absorption. This makes E40-coloured products particularly suitable for outdoor applications such as agricultural films, pipes, and construction materials that will be exposed to direct sunlight for extended periods.

Store E40 in a dry, well-ventilated warehouse with temperatures between 5°C and 35°C. Keep the sealed bags away from direct sunlight, moisture, and rain. The product has a shelf life of 12 months from the date of production when stored under these conditions. Avoid stacking bags more than 10 layers high to prevent bottom bag damage. If any bags are opened, reseal them tightly and use the contents within one month.

The primary difference lies in the carbon black loading level. E40 contains approximately 40% carbon black, whereas lower-concentration alternatives may contain only 20% to 30%. Higher concentration means you need to add less masterbatch to your resin to achieve the same black shade — which reduces your per-unit pigment cost. E40 also provides deeper color saturation and better UV protection due to the higher pigment content. Lower-concentration products may be preferable only if you require less carbon black for specific aesthetic reasons, such as a lighter gray-black shade.

Yes. When you receive your first sample or trial order, our technical team provides recommended processing parameters including mixing ratio, extrusion temperature ranges, and screw speed suggestions specific to your equipment type. If you encounter any issues during the trial run — such as streaking, uneven color, or processing difficulties — our engineers are available to troubleshoot remotely and adjust the formulation if needed. We believe in supporting our partners through the entire adoption process, not just at the point of sale.

E40 is designed primarily for non-food-contact applications such as packaging bags, pipes, and industrial molded parts. For food-contact applications, we offer a separate food-grade black masterbatch line that meets relevant migration regulations and uses food-safe carbon black and carrier resins. If your application involves direct or indirect food contact, please reach out to our team and we will recommend the appropriate certified product.