Introduction

 

WM8E is produced by unique process in which carbon black is pre-dispersed, then compounded with the basic resin through plastication.

It is widely used in film blowing , blowing plastic and injection applications. Suitable for PP and PE materials.

It features low dosage, high blackness, good brightness, excellent heat resistance, outstanding dispersibility and tinting power, and minimal impact on the physical properties of the final product.

 

Black Masterbatch WM8E at a Glance

 

27% ± 1.5% carbon black  :  good blackness, strong covering power for thin-gauge and recycled-blend films

Moisture ≤ 0.1% : among the lowest in its class; no pre-drying, fewer bubble breaks and gels

Dispersion: Excellent (≤ Level 3)  :  pre-dispersed pigment protects filter packs and film appearance

MFI 5–20 g/10min (190 °C / 10 kg)  :  wide processing window matching common film-blowing lines

RoHS compliant

OEM and ODM accepted

 

Where Black Masterbatch WM8E is Used and Its Applications

 

Application	What WM8E Delivers
Shopping bags and T-shirt bags	Deep, glossy black at retail sales price; keeps tear and tensile properties intact
Garbage bags and waste can liners	Full opacity that masks recycled resin discoloration, consistent black roll after roll
Industrial liners and film	Stable dispersion ; low moisture for long time runs
Courier bags and  e-commerce mailers	Uniform black for co-ex mailers; clean surface for printing and sealing
Injection parts	Home appliance casings and similar PP/PE parts at 0.8–2.0% dosage
Blow-molded containers	Petrol barrels and similar containers with uniform black walls

The Reasons Why Producers Prefer to Use Black Masterbatch WM8E

 

1. Pre-Dispersed Carbon Black : Clean Film, Clean Filters

Carbon black agglomerates are the first defect source in black blown film industry : black specks on the surface, gels in the bubble, and premature screen-pack blockage.

WM8E's pre-dispersion + plastication process breaks agglomerates at the pellet stage, so dispersion happens in seconds on your line , not on the film surface.

This directly reduces start-up scrap and filter changes.

2. Ultra Low Moisture : Run Without Pre-Drying

With moisture held at ≤ 0.1%, WM8E can run straight from the bag.

Low moisture means fewer bubble breaks, fewer gels, and stable output at high line speeds ,  meaningful advantage over typical filled masterbatches that sit at 0.5% or above.

3. Deep Blackness at Economical Dosage

The 27% carbon-black loading is balanced against a compatible mineral filler, cutting the coloring cost per ton without sacrificing covering power.

Even at thin gauges or with reclaimed-resin blends, 4–8% dosage achieves a uniform and opaque jet black.

4. Reliable Melt Flow Index Across the Window

MFI 5–20 g/10min (190 °C / 10 kg) keeps melt flow matched to common LDPE/LLDPE film grades, supporting stable melt pressure and smooth bubble behavior across different extruder setups.

5. One Grade for Multiple Processes

The same pellet qualifies for blown film, blow molding and PP/PE injection molding (e.g. home appliance casings), letting buyers consolidate SKUs and simplify purchasing.

6. Flexible Supply — OEM/ODM Supported

Different line, different target? Carbon black loading, carrier resin and pellet format can be customized (carbon black contant 、concentration、MOQ )

 

Technical Parameter 

 

Carbon Content	27%±1.5
Carrier	PE
MFI	5-20 (g/ 10min（190℃ 10kg）
Moisture	≤0.1%
Dispersion	Excellent (≤ Level 3)
Compliance	RoHS
Application	Blown film (Garbage/Courier bags) , Injection (Home Appliance Casing) , Blow Bottle (Petrol Barrel)
Dosage Advice	Film/Bottle blowing: 4.0–8.0%   Injection: 0.8–2.0%
OEM	Accepted

 

Why Source Black Masterbatch WM8E from Jolink

 

As the leading black masterbatch manufacturer in China , running over 30 years with annual capacity at 30,000. tonnes ，we gurantee batch level with COA and traceability sytem,  customized formula services and

development cycle , also providing you the factory direct supply price to save cost , response speed of technical support,  and support you regular delivery period.

Jolink also coverage of application fields, we also supplies specialized grades for water-supply pipe black masterbatch , explore our full product range for pipe, film and injection applications.

https://www.jolink-masterbatches.com/product/category/water-supply-pipe-and-drip-irrigation-tube-black-masterbatch

Frequently Asked Questions

 

Can WM8E be used with recycled PE film materials?

Yes. High blackness and strong hiding power effectively mask discoloration from recycled resin. Start at 6% and increase toward 8% depending on recycled content and required opacity.

 

Does WM8E need pre-drying before use?

No. With moisture ≤ 0.1%, WM8E runs directly from the bag. If the bag has been left open in humid conditions, reseal and let the product stabilize before use.

 

Will the filler content weaken the film?

No. The mineral filler is balanced against the 27% carbon black to cut cost while preserving tensile strength, tear resistance and sealing performance at commodity bag size.

 

Do you offer the lower or higher carbon black grade?

Yes. OEM and ODM is accepted  : loading, carrier and pellet size can be customized as per your request.

 

What regulations and test documents do you provide?

Technical data sheet, COA per batch and SDS are available. RoHS compliance is provided. 

 

Can we get samples for a production trial?

Yes ! Free samples are available for lab and line trials. Send us your using grade, film thickness, resin  and target blackness details, we will confirm grade and dosage within 24 hours. https://www.jolink-masterbatches.com/contact-us

 

Packing and Storage 

 

25kg/bag, PE or Composite Paper bag

Stored under dry, enclosed and cool conditions, protected from UV rays and/or direct sunlight. After used, the opened packaging must be resealed properly to prevent the product from absorbing moisture, which could affect its performance.

 

Note 

The technical results are typical values and are provided for customer reference only. They are not to be regarded as a guarantee of minimum or maximum quality specifications.