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Enhanced UV Protection Black Masterbatch

Enhanced UV Protection Black Masterbatch

Enhanced UV protection black masterbatch uses polyethylene (PE) as the primary carrier, with appropriate amounts of carbon black and functional fillers added through a scientifically formulated and melt-processed process. With a carbon black content of approximately 45% ± 2%, it provides uniform and stable coloring for plastic products while imparting enhanced UV protection. Suitable for a variety of processes, including blown film, pipe extrusion, and injection molding, this product meets the requirements for aging resistance, durability, and consistent appearance for various plastic products. In practice, a recommended addition ratio of 1-3% can effectively improve product performance.
This black masterbatch enhances the product's resistance to UV aging, reduces surface fading and cracking caused by prolonged exposure to sunlight or outdoor environments, and extends the product's service life. Its corrosion resistance also enhances its stability in contact with liquids and chemicals, making it suitable for use in water pipes and other plastic components exposed to the environment. The black masterbatch exhibits excellent dispersibility during processing, allowing it to fully bond with the base material, thereby enhancing the product's structural stability and overall strength. Enhanced UV protection black masterbatch not only brings uniform color effects, but also provides long-lasting anti-aging, anti-corrosion and structural stability support for plastic products. It is suitable for use in fields with high requirements for outdoor service life and reliability.

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Parameter

# BLACK MASTERBATCH H6045

H6045 is made of PE. Carbon black concentration is around 45%.
Applicable for blowing film, pipe extrusion, injection

Ingredients Carbon Black: 45%±2
ASH: <1%
Usage Mixed with materials.
Dosage suggested 1-3%.
Technical Index Density: <2.0g/cm3
Melting Speed:>10g/10min(21.6kg/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

Enhanced UV Protection Black Masterbatch — Grade H6045

45%
Carbon Black — No Filler, No Dilution
<1%
Ash Content
>10
MFR g/10min
<0.50%
Moisture

H6045 is designed around one priority that matters more than any other for water supply pipe applications: UV protection that lasts the full buried and above-ground service life of a PE pipe system without requiring a separate UV stabilizer masterbatch. At 45% carbon black with ash content below 1% — no calcium carbonate filler, no inorganic dilution — H6045 delivers the highest-purity UV-absorbing mass per kilogram of masterbatch available in E-LUCK's pipe grade range. Every gram of masterbatch introduced into the HDPE pipe compound is contributing active UV shield, not inert filler weight.

For potable water and pressure-rated pipe applications where PE compound specifications are tightly controlled and where each component's contribution to the pipe wall must be independently verifiable, H6045's clean formulation — PE carrier plus 45% CB, nothing else — is the technically correct choice. The pipe compound receives precisely what is specified: carbon black at the internationally recognized minimum effective concentration for long-term UV protection in black PE pipe (typically 2–2.5% CB by mass in the pipe wall, per ISO 11922 and equivalent standards).

Technical Data Sheet

H6045 — Full Parameter Reference

Parameter Specification Method / Notes
Grade Code H6045 Water Supply Pipe — Enhanced UV Protection Series
Carrier Resin Polyethylene (PE) Compatible with HDPE and MDPE pipe compound resins
Carbon Black Content 45% ± 2% High-structure furnace CB — primary UV absorber
Filler None Zero mineral addition — pure CB in PE carrier
Ash Content < 1% ISO 3451 — near-zero inorganic residue
Density < 2.0 g/cm³ ISO 1183
Melt Flow Rate > 10 g/10 min 190°C / 21.6 kg; ISO 1133 — matches HDPE pipe compound processing range
Moisture Content < 0.50% Critical for void-free pipe wall in high-output extrusion
Primary Process Pipe extrusion, blown film, injection molding Validated for PE pressure pipe (PN10 / PN16 HDPE applications)
Recommended Dosage 1% – 3% At 2%: introduces 0.90% actual CB into pipe wall — meets most UV protection requirements
Packaging 25 kg / bag (KP or PE bag) Sealed for moisture protection; dry warehouse storage
UV Protection Reference

How Carbon Black Concentration Maps to UV Protection Level in PE Pipe

Carbon black loading in the finished pipe wall is the primary determinant of UV protection lifetime. The following ladder shows the relationship between masterbatch addition rate and effective CB introduction at 45% concentration, mapped against typical pipe application requirements.

Minimum Threshold
CB in wall: ~0.5%

H6045 at 1% dosage introduces 0.45% actual CB into the pipe wall — at the lower bound of protective CB concentration. Suitable for indoor conduit or protected above-ground pipe with limited UV exposure. Not recommended for unshaded outdoor service exceeding 12 months.

Standard Protection
CB in wall: ~0.9%

H6045 at 2% dosage: 0.90% CB in the finished pipe wall. This approaches the 1% CB level typically referenced in PE pipe standards (ISO 11922, EN 12201) as the standard specification for outdoor-service black PE pipe. Adequate for most buried and partially shaded installations with intermittent UV exposure.

Enhanced UV Grade
CB in wall: ~1.1–1.3%

H6045 at 2.5–3% dosage: 1.1–1.35% CB in the pipe wall — the "Enhanced UV" target range for fully exposed installations. Above-ground water mains, exposed agricultural irrigation risers, open-rack cable conduit, and pipe sections stored outdoors pre-installation. The higher CB fraction provides a photon absorption density that maintains PE chain integrity for significantly longer service periods under unshaded tropical or high-altitude UV flux conditions.

Maximum Loading
CB in wall: ~1.8%

H6045 at 4% dosage (above standard recommendation): 1.80% CB in pipe wall. Above the standard specification range and rarely required. At this level, the PE carrier introduction begins to approach concentrations where carrier-phase effects on pipe wall mechanical properties become worth monitoring. Only consider for specialist applications with documented extreme UV exposure requirements, confirmed with E-LUCK technical team.

UV Protection Mechanisms

Three Ways Carbon Black Protects a PE Pipe Wall from UV Degradation

01

Photon Absorption Before Chain Scission

Carbon black absorbs UV photons across the full UV-A (315–400 nm) and UV-B (280–315 nm) spectrum and dissipates the energy as heat. This interception prevents photons from reaching PE molecular chains and initiating the free-radical chain scission reaction responsible for surface chalking, embrittlement, and loss of tensile elongation. At 0.9% CB in the pipe wall, the mean free path of UV photons is reduced to fractions of a millimeter — meaning the active UV dose at the pipe interior surface is negligible even after decades of outdoor exposure.

02

Radical Scavenging at Active Sites

Carbon black surface contains quinone and lactone functional groups that act as radical scavengers — they intercept the free radical chain carriers generated by any UV photons that penetrate past the absorption layer. This secondary mechanism provides protection in the sub-surface zone where the primary absorption is less complete, creating a defense-in-depth UV protection profile across the pipe wall cross-section rather than relying on a single absorption layer at the outer surface.

03

Thermal Stability Contribution

Outdoor pipe surfaces in direct sunlight reach surface temperatures significantly above ambient — 60–80°C in tropical climates. At these temperatures, thermal oxidation of PE accelerates, synergistically interacting with UV degradation to accelerate surface deterioration. Carbon black's thermal absorption, combined with its radical scavenging, moderates the rate of both thermal and photo-oxidative degradation simultaneously. The filler-free formulation of H6045 means no CaCO₃ particles are present to create localized thermal stress concentration sites at the pipe outer surface under cyclic heating.

Processing Guide

H6045 in HDPE Pipe Extrusion — Key Parameters

Process Parameter
H6045 Guidance
Barrel Temperature
180–230°C — standard HDPE pipe compound range; H6045 integrates cleanly throughout without decomposition
Mixing Point
Hopper dry-blend preferred; gravimetric feeder ensures consistent dosage accuracy across long runs and shift changes
Dosage at 2% target
20 kg H6045 per 1,000 kg HDPE compound — introduces 9 kg actual CB and ~10.5 kg PE carrier per tonne of pipe
Screw / Die Check
No die modification needed; H6045's high MFR (>10 g/10min) integrates with standard HDPE pipe compound MFR (0.2–1.2 g/10min at 21.6 kg) without pressure anomaly
Pre-Drying
Not required under standard storage conditions (<0.5% moisture at delivery). If exposed to humidity above 70% RH for more than 4 weeks, pre-dry at 70°C for 2 hours as precaution
Color Verification
Take cross-section chip at start of each production run; verify uniform black throughout pipe wall cross-section under standard illumination before committing to full run
Purge Protocol
Standard PE pipe compound purge; H6045 is PE-carrier and clears cleanly from the screw and die in 5–8 standard pipe lengths at purge temperature
Technical FAQ

Water Supply Pipe Manufacturers Ask About H6045

Does H6045 meet the carbon black content and dispersion requirements of ISO 4427 or EN 12201 for PE water pipe?+

ISO 4427 and EN 12201 specify that black PE pipe for potable water service must contain carbon black at 2–2.5% by mass, uniformly dispersed (dispersion rating ≤3 per EN ISO 18553). H6045 at 2% letdown introduces 0.90% CB into the pipe wall — below the 2% minimum requirement for the pipe wall as a whole. This is because the masterbatch is not the only CB source in a pipe compound: the HDPE base resin used in pipe production is typically already compounded to include some CB loading, or the masterbatch is added to achieve the total CB target in the finished compound. For a pipe compound using natural HDPE base resin plus H6045 masterbatch only, a dosage of 4.4–5.5% H6045 would be needed to reach 2–2.5% CB in the pipe wall. Contact E-LUCK with your base compound's existing CB content for accurate dosage calculation.

Why is the ash content of H6045 below 1% when other pipe-grade masterbatches use CaCO₃ filler?+

The absence of CaCO₃ filler in H6045 is a deliberate formulation choice for water supply pipe specifically. Pressure-rated PE pipe is tested for long-term hydrostatic strength, creep resistance, and slow crack growth resistance — all of which are sensitive to the presence of mineral particles at or near the pipe inner surface. Even at low filler loading levels, CaCO₃ particles can create stress concentration sites in the pipe wall that become initiation points for slow crack growth under sustained pressure cycling. H6045's filler-free formulation eliminates this risk and allows the pipe compound's base resin to develop its full mechanical performance without interference from inorganic inclusions from the masterbatch. For sewer pipe or non-pressure drainage applications where mechanical requirements are less stringent, E-LUCK's 507C or 508C filler-containing grades offer a more cost-effective solution.

Can H6045 be used in LLDPE agricultural film production in addition to HDPE pipe?+

Yes. H6045 is compatible with both HDPE pipe extrusion and LLDPE blown film processing. In agricultural film applications — black silage wrap, mulch film, irrigation lay-flat — the high CB concentration (45%) provides strong UV shielding for the film lifetime and the absence of filler ensures film mechanical properties (tear resistance, puncture strength, elongation) are not compromised. At 2% dosage in LLDPE blown film, H6045 introduces 0.90% actual CB — sufficient for full UV protection in standard agricultural film applications. For mulch film requiring photo-selective wavelength transmission for soil warming, standard fully-black formulations using H6045 at 2–3% dosage produce complete opacity across the UV and visible spectrum.

Water Pipe UV Specification — Get Dosage Calculation Support
Share your base HDPE resin CB content and pipe standard requirement. E-LUCK will calculate the precise H6045 addition rate to meet your specification.

About Us
E-LUCK .
E-LUCK .

As China Enhanced UV Protection Black Masterbatch Factory and China Enhanced UV Protection 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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