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Environmentally Resistant Black Masterbatch

Environmentally Resistant Black Masterbatch

Environmentally resistant black masterbatch is a modified material made from polyethylene (PE) with an appropriate amount of carbon black and other functional fillers. Its carbon black concentration is approximately 45%, and its optimized formulation ensures stable performance in processes such as blown film, pipe extrusion, and injection molding. The product's uniform coloring ensures consistent color and enhances the appearance and texture of finished products. When mixed with other materials, a recommended addition ratio of 1-3% is recommended to achieve optimal results in various applications.
During application, this black masterbatch effectively enhances the product's UV resistance, reducing aging problems caused by long-term exposure to light, thereby extending the product's service life. Its corrosion resistance provides additional protection in liquid-contact applications such as water pipelines, reducing damage to the product structure caused by acidic and alkaline environments. The black masterbatch also improves the product's structural stability, making it less susceptible to deformation or cracking when subjected to external pressure or environmental stress, thereby enhancing overall reliability and safety.

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Parameter

# BLACK MASTERBATCH 6045

6045 is made of PE. Carbon black concentration is around 45%. Applicable for blowing film, pipe extrusion, injection

Ingredients Carbon Black: 10%±2
ASH: <1%
Usage Mixed with materials.
Dosage suggested 1-3%.
Technical Index Density: <2.0g/cm3
Melting Speed:>10g/10min(20kg/190℃)
Moisture:<0.50%
Package 25kg per bag, KP bag or PE bag
Storage Place in dry and cool warehouse, avoid sun shine and raining.
Note The above index is based on the testing result for reference only, not as the specific index.
Water Supply Pipe Series

Environmentally Resistant Black Masterbatch — Grade 6045

Grade 6045 approaches the water supply pipe masterbatch requirement from a different angle than high-concentration UV grades. Where H6045 maximizes carbon black loading for maximum UV shielding per kilogram, 6045 is formulated around the environmental durability question specific to water contact applications: how does the masterbatch contribute to the pipe's resistance to chemical attack, biological exposure, and the variable water chemistry conditions that plastic pipe infrastructure encounters across its service life?

At 10% carbon black with ash content below 1% and zero mineral filler, 6045 introduces CB and PE carrier only — a formulation that ensures no leachable inorganic content is contributed by the masterbatch into the potable water stream. In water supply applications, this is the relevant compliance consideration: the masterbatch must not introduce chemical migrants that fail regulatory extractables testing under EN 15768, NSF/ANSI 61, or equivalent frameworks. A filler-free, low-CB formulation minimizes the chemical contribution of the masterbatch to the pipe compound's regulatory profile.

The lower CB concentration (10%) means 6045 is typically used at higher letdown rates than high-concentration grades when full black saturation is the target — or is deployed in applications where the primary objective is environmental resistance and structural integrity rather than UV barrier performance, with the CB providing colorant and moderate UV contribution alongside the pipe compound's own carbon black loading.

Grade 6045 Key Values
Carbon Black
10% ± 2%
Lower concentration; higher letdown range
Ash Content
<1%
Filler-free — no mineral migrants to water
MFR
>10 g/10min
20 kg / 190°C test condition
Moisture
<0.50%
Controlled for pipe extrusion void-free wall
Dosage
1–3%
Adjust to target CB% in finished compound
Technical Data Sheet

6045 — Parameter Reference

Parameter Specification Method / Notes
Grade Code 6045 Water Supply Pipe — Environmentally Resistant Series
Carrier Resin Polyethylene (PE) Compatible with HDPE and MDPE water supply pipe compounds
Carbon Black Content 10% ± 2% Lower-concentration grade; coloring + moderate UV contribution
Filler None Zero CaCO₃ or mineral addition — no inorganic leachable content from masterbatch
Ash Content < 1% ISO 3451 — near-zero inorganic residue; relevant for water contact compliance
Density < 2.0 g/cm³ ISO 1183
Melt Flow Rate > 10 g/10 min 190°C / 20 kg; ISO 1133
Moisture Content < 0.50% Critical for void-free pipe wall in continuous pipe extrusion
Recommended Dosage 1% – 3% Higher end (2.5–3%) when full black saturation is the primary target
Key Performance Environmental resistance, UV aging resistance, corrosion resistance, structural stability Filler-free formulation preserves base resin mechanical performance
Compatible Processes Blown film, pipe extrusion, injection molding Water supply pipe extrusion is the primary validated context
Packaging 25 kg / bag (KP or PE bag) Sealed storage; dry, cool warehouse, no direct UV
Environmental Resistance Profile

Six Environmental Stress Vectors Relevant to Water Supply Pipe — and How 6045 Addresses Each

01UV
Solar UV Exposure

10% CB at 2–3% dosage introduces 0.20–0.30% actual carbon black into the pipe wall — sufficient to provide meaningful UV protection for above-ground pipe runs with intermittent exposure and for pipe sections during pre-installation yard storage. For fully exposed permanent above-ground installations, a higher-concentration CB grade (H6045) is the preferred specification.

02pH
Chemical & pH Resistance

PE pipe is inherently resistant to the pH range (6–9) of most distributed water systems and to common water treatment chemicals (chlorine, chloramines, fluoride at treatment concentrations). 6045's filler-free formulation ensures no CaCO₃ is present in the pipe wall to contribute localized alkalinity at particle surfaces — a concern in acidic groundwater applications where CaCO₃ dissolution can create micro-pit pathways.

03BIO
Biological Resistance

PE pipe is non-nutrient and does not support biofilm growth on its own surface. The absence of CaCO₃ filler in 6045 eliminates mineral surface sites that can sometimes anchor initial biofilm adhesion on pipe inner surfaces. Carbon black itself is biologically inert and does not serve as a nutrient source for the microorganisms typically present in distributed water systems.

04SOIL
Soil Stress & Burial Conditions

Buried water supply pipe faces soil pressure loads, differential settlement, and long-term creep under sustained load. 6045's filler-free formulation preserves the base HDPE resin's slow crack growth resistance and long-term hydrostatic strength — the two properties most critical for buried pressure pipe. No inorganic particles from the masterbatch are present to act as stress concentration sites under cyclic soil loading.

05TEMP
Temperature Cycling

Water distribution networks experience daily and seasonal temperature cycling that subjects pipe material to cyclic thermal expansion and contraction stress. PE handles this through its viscoelastic deformation behavior. The filler-free masterbatch contributes no mineral inclusion that could develop micro-debonding sites at the inclusion-polymer interface under repeated thermal cycling — a known long-term failure initiation mechanism in highly filled PE compounds.

06CHEM
Water Contact Safety

For potable water applications, the regulatory consideration is migration of components from the pipe wall into the water stream. 6045's filler-free formulation means the masterbatch contributes only PE carrier and carbon black — both assessed and approved under food-contact and water-contact frameworks in major markets. No CaCO₃ particle migration, no mineral dissolution products, no heavy metal co-contaminants from mineral filler sources.

Formulation Logic

Why a 10% CB Grade Exists — and When It Is the Right Specification

Pre-colored compound
Regulatory minimization
Cost optimization
Multi-purpose use
When the HDPE base compound already contains carbon black

Many HDPE pipe resins are supplied as pre-colored black compounds by the resin producer, containing 2–2.5% CB already incorporated into the pellet. Adding a high-concentration masterbatch (40–45% CB) to this pre-colored base would over-load the compound with carbon black — potentially moving outside the specified CB range for the pipe standard and adding unnecessary cost. Grade 6045 at 10% concentration allows fine-tuning of the CB level in pre-colored HDPE pipe compounds without the risk of over-addition that comes with high-concentration grades at small dosage increments.

At 1% dosage of 6045 into a pre-colored HDPE compound, only 0.10% additional CB is introduced — a precise incremental addition for compounds that are close to their CB target but need slight reinforcement without the coarser dosage resolution of a 40% grade.

Minimizing masterbatch contribution to water contact regulatory profile

Water contact compliance testing (NSF/ANSI 61, EN 15768, drinking water regulations) assesses extractable and leachable substances from the total pipe compound. Every component of the compound — base resin, antioxidants, processing aids, masterbatch — contributes to the total extractable profile. While carbon black and PE carrier are both broadly approved for water contact use, reducing the total mass of masterbatch added (by using a lower-concentration grade at equivalent total CB introduction) reduces the total quantity of any masterbatch-associated extractables that could contribute to test results.

At 1% dosage of 6045, only 10 g of masterbatch per kg of pipe compound is added. At 2% dosage of a 40% grade for equivalent CB introduction, 50 g per kg of masterbatch enters the compound — five times the mass of masterbatch-derived material in the pipe wall.

Cost optimization in applications where full UV protection is not required

Not every pipe application requires the maximum UV protection delivered by a 45% CB grade at 3% dosage. Buried pipe, indoor conduit, protected above-ground installations with shade structures, and short-service-life temporary irrigation pipe all have significantly lower UV exposure requirements than permanently exposed infrastructure. For these applications, 6045 at 2–3% dosage provides adequate UV protection and coloring at a lower per-kilogram cost than high-concentration grades, without the mechanical property premium that comes with filler-free high-CB formulations.

The economic calculation: for pipe extrusion consuming 500 tonnes of compound per month, the choice between a high-concentration grade at 4% dosage and a lower-concentration grade at the equivalent CB introduction rate can represent a significant material cost differential when the lower-concentration grade is also lower-priced per kilogram.

Multi-process use across blown film, pipe, and injection on the same line

Pipe manufacturers who also produce blown film or injection-molded fittings on the same site often stock a single masterbatch grade that can be used across all three processes without the risk of accidentally using a high-UV-specification pipe grade in a blown film application where the economics don't support it. Grade 6045's 10% CB concentration and compatibility across blown film, pipe, and injection processes makes it a flexible single-SKU solution for smaller operations running multiple product types.

The lower concentration also makes dosage errors less consequential: if an operator accidentally adds 4% instead of 2%, the over-addition of a 10% grade results in 0.40% CB in the compound rather than 0.20% — a tolerable over-specification. The same error with a 40% grade results in a much larger deviation from specification.

Applications

Where Grade 6045 Is the Appropriate Specification

Primary
PE Water Supply Pipe — Buried Service

Buried PE water mains and service connections where UV exposure is absent after installation but corrosion resistance and structural integrity under soil loading are required. 6045's filler-free formulation preserves the base HDPE's slow crack growth performance, and its moderate CB contribution provides interim UV protection during above-ground storage prior to installation — typically 3–12 months in open pipe yards.

Use in conjunction with antioxidant and UV stabilizer packages in the base HDPE compound per pipe standard requirements. 6045 contributes CB loading; the compound's antioxidant system provides long-term oxidative stability.

Secondary
Blown Film — Agricultural & Industrial

Agricultural mulch film, industrial protective sheeting, and construction barrier films where black coloring and moderate UV protection are required but where the extreme UV exposure of permanent outdoor installations is not present. At 3% dosage in LLDPE or LDPE blown film, 6045 delivers 0.30% CB in the film — adequate for seasonal outdoor use of 12–24 months in most climatic conditions.

The lower CB concentration results in slightly lower optical density per unit dosage than high-concentration grades — compensate by using the upper end of the dosage range (2.5–3%) for applications where full light block is required at thin film gauges.

Tertiary
Injection Molded PE Fittings & Connectors

PE pipe fittings, compression couplings, and irrigation connectors where chemical resistance to water treatment chemicals and soil contact is relevant. The filler-free, low-mineral-content formulation of 6045 ensures no mineral particles are present at the injection gate or weld line to initiate stress cracking under the cyclic pressure loading characteristic of pressurized irrigation systems.

At 2% dosage in injection-grade HDPE or LLDPE, 6045 produces uniform black coloring across complex fitting geometries including thick-wall sections, threaded bosses, and integration barbs where flow-front shear variation could cause color non-uniformity with lower-MFR masterbatches.

FAQ

Questions About Grade 6045

What is the difference between grade 6045 and grade H6045 in the water pipe application context?+

Both 6045 and H6045 are PE-carrier, filler-free black masterbatches for water supply pipe applications. The primary difference is carbon black concentration: 6045 at ~10% CB and H6045 at ~45% CB. At equivalent dosage, H6045 introduces 4.5 times more actual CB into the pipe compound. H6045 is the preferred specification when maximum UV protection per unit dosage is required — such as in fully exposed above-ground installations or when the compound must reach the 2–2.5% CB target specified in pipe standards using masterbatch as the primary CB source. Grade 6045 is the appropriate choice when adding to a pre-colored base compound, when minimizing total masterbatch mass in the compound is a regulatory or cost priority, or when the UV exposure requirement is moderate and a lower CB introduction is acceptable.

Is the carbon black in 6045 approved for potable water contact applications?+

Carbon black used in potable water pipe applications is assessed under regulatory frameworks including NSF/ANSI 61 (North America), EN 15768 (Europe), and national drinking water material standards. Carbon black itself — specifically furnace-grade CB as used in 6045 — is broadly accepted in these frameworks as a colorant and UV stabilizer for PE pipe when used within the specified concentration range and when the specific CB grade and masterbatch have been assessed under the relevant standard. The absence of CaCO₃ filler in 6045 removes the main source of inorganic extractable concern from the masterbatch. For formal compliance documentation (NSF 61 listing, WRAS approval, national potable water certification), the pipe compound as a whole — not the masterbatch alone — must be assessed and certified. Contact E-LUCK for documentation support if your pipe product requires specific potable water certification.

Environmental Resistance Starts at the Compound Level
Tell us your pipe standard, base resin CB content, and dosage target. We'll confirm whether 6045 or another grade in the range is the right fit for your compound specification.
Request Sample Compound Specification Support
About Us
E-LUCK .
E-LUCK .

As China Environmentally Resistant Black Masterbatch Factory and China Environmentally Resistant Black Masterbatch Suppliers, E-LUCK is a professional manufacturer and solution provider specializing in black masterbatch for industrial applications. Since our founding, we have remained committed to the core values of precision, consistency, and material intelligence, integrating advanced dispersion technology with rigorous quality systems to meet the increasingly complex demands of modern polymer processing. From pipes and fittings to automotive parts, from consumer electronics to packaging films, our black masterbatches play a quiet yet critical role in enhancing product appearance, performance, and lifecycle for a wide range of downstream industries.

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