Rotomolding & Coating Materials

PolyE develops and supplies rotomolding-grade modified polyethylene and anti-corrosion coating materials for rotational molders and industrial coaters. Our modified polyethylenes are engineered for uniform wall thickness, low residual stress and consistent part quality across large, complex hollow parts.

Rotational molding products: water tanks, marine buoys, playground equipment

Rotomolding-grade modified HDPE

High-density polyethylene grades tuned for stiffness, impact strength and environmental stress-crack resistance (ESCR). Ideal for tanks, containers, industrial housings and structural rotomolded parts.

Rotomolding-grade modified MDPE

Medium-density grades balancing toughness and flexibility — a common choice for larger tanks, buoys and parts needing higher crack resistance than HDPE.

Rotomolding-grade modified LDPE

Low-density grades for flexibility, soft-touch and low-temperature performance in seals, liners and consumer-facing rotomolded goods.

Functional additive options

We tailor grades with one or more functional packages:

Antibacterial

Inhibits bacterial growth on surfaces — for water, food-contact and healthcare rotomolded parts.

Anti-algae

Reduces algae adhesion in water-storage and aquaculture tanks exposed to light.

Antistatic

Dissipates static for electronics, powder-handling and explosive-atmosphere components.

Flame retardant

Halogen-free or standard FR systems to meet transport, electrical and building requirements.

Anti-corrosion coating materials

Beyond rotomolding powders we supply lining/coating materials for corrosion protection:

PE anti-corrosion material

Polyethylene coating for steel pipes, tanks and fittings — chemical resistance and long service life.

PO anti-corrosion material

Polyolefin (PO) lining for aggressive chemical, electroplating and wastewater environments.

Industries & applications

Our materials serve 12+ industries:

Military packaging

Rugged, lightweight transit and storage cases.

Cold-chain transport

Insulated and durable containers for temperature-controlled logistics.

Agriculture

Sprayers, troughs, silos and fertilizer tanks.

Engineering machinery

Fuel tanks, ducts, housings and covers.

Special transport equipment

Custom hollow parts for rail, aerospace and defense.

Outdoor playground

Safe, UV-stable play structures and components.

Water recreation

Kayaks, buoys, floats and marine fenders.

Livestock & poultry

Feeders, troughs and sanitation equipment.

Chemical anti-corrosion

Tanks, linings and piping for aggressive media.

Environmental equipment

Waste, water-treatment and separation vessels.

Cleaning equipment

Tanks and bodies for industrial cleaning machines.

General storage

Pallets, bins and bulk containers.

Technical advantages

Consistent powder fluidity and melt behavior for repeatable cycles.
Optional UV stabilization for harsh outdoor and Gulf-climate use.
Food-contact capable grades available on request.
Custom color, density and additive packages.
Technical support from formulation to trial molding.

Flagship grades for water sports & structural parts

Five proven rotomolding grades — from ultra-high-density kayak compounds to high-impact PO for sailboats, whitewater boats and kart boats. All are available in any color, with UV8–UV20 stabilization and optional antibacterial, anti-algae and antistatic packages.

R550HL rotomolding grade — PolyE New Material

R550HL Rotomolding-grade modified HDPE Ultra-high density (kayak)

R550HL is a rotomolding-grade modified HDPE powder engineered for kayaks and other rigid hollow parts. Available in any color, with UV8–UV20 stabilization and optional antibacterial, anti-algae and antistatic packages.

Applications: KayaksSUPs (stand-up paddle boards)Kneeboards

Outstanding rigidity
Higher heat resistance
Excellent impact performance
25–35% lighter than conventional LLDPE

Property	Test standard	Typical value	Unit
Density	ASTM D 1505	0.950	g/cm³
Melt flow rate	ASTM D 1238 (190 °C, 2.16 kg)	5.0	g/10min
Tensile strength at break	ASTM D 638 (50 mm/min)	22	MPa
Elongation at break	ASTM D 638 (50 mm/min)	500	%
Impact strength	ARM	22	J/mm
Surface hardness	ASTM D 2240	70	Shore D
Vicat softening point	ASTM D 1525	120	°C
Oxidation induction time (OIT)	ASTM D 3895	30	min

R335HL rotomolding grade — PolyE New Material

R335HL Rotomolding-grade modified HDPE High density (kayak)

R335HL is a rotomolding-grade modified HDPE powder for kayaks and similar rigid parts. Available in any color, UV8–UV20 stabilization, and optional antibacterial, anti-algae and antistatic packages.

Applications: KayaksSUPs (stand-up paddle boards)Kneeboards

Very good rigidity
Higher heat resistance
Excellent impact performance
5–15% lighter than conventional LLDPE

Property	Test standard	Typical value	Unit
Density	ASTM D 1505	0.946	g/cm³
Melt flow rate	ASTM D 1238 (190 °C, 2.16 kg)	4	g/10min
Tensile strength at break	ASTM D 638 (50 mm/min)	20	MPa
Elongation at break	ASTM D 638 (50 mm/min)	800	%
Impact strength	ARM	20	J/mm
Surface hardness	ASTM D 2240	68	Shore D
Vicat softening point	ASTM D 1525	120	°C
Oxidation induction time (OIT)	ASTM D 3895	30	min

R5036HL rotomolding grade — PolyE New Material

R5036HL Rotomolding-grade modified MDPE Medium density (kayak)

R5036HL is a rotomolding-grade modified MDPE powder for kayaks, SUPs and kneeboards. Available in any color, UV8–UV20 stabilization, and optional antibacterial, anti-algae and antistatic packages.

Applications: KayaksSUPs (stand-up paddle boards)Kneeboards

Higher rigidity than conventional LLDPE
Higher heat resistance than conventional LLDPE
Excellent impact performance
Excellent processability

Property	Test standard	Typical value	Unit
Density	ASTM D 1505	0.939	g/cm³
Melt flow rate	ASTM D 1238 (190 °C, 2.16 kg)	5.5	g/10min
Tensile strength at break	ASTM D 638 (50 mm/min)	18	MPa
Elongation at break	ASTM D 638 (50 mm/min)	700	%
Impact strength	ARM	20	J/mm
Surface hardness	ASTM D 2240	65	Shore D
Vicat softening point	ASTM D 1525	118	°C
Oxidation induction time (OIT)	ASTM D 3895	40	min

R536L rotomolding grade — PolyE New Material

R536L Rotomolding-grade modified LLDPE Low density (kayak)

R536L is a rotomolding-grade modified LLDPE powder with a good balance of stiffness and flexibility and excellent flow that reduces porosity and short shots. Available in any color, UV8–UV20 stabilization, and optional antibacterial, anti-algae and antistatic packages.

Applications: KayaksSUPs (stand-up paddle boards)Kneeboards

Good balance of rigidity and toughness
Excellent processability
Excellent low-temperature performance
Complies with US FDA food-contact grade

Property	Test standard	Typical value	Unit
Density	ASTM D 1505	0.936	g/cm³
Melt flow rate	ASTM D 1238 (190 °C, 2.16 kg)	5.0	g/10min
Tensile strength at break	ASTM D 638 (50 mm/min)	12.5	MPa
Elongation at break	ASTM D 638 (50 mm/min)	500	%
Notched impact strength	ASTM D 6110 (23 °C)	20	kJ/m²
Powder flow rate	ASTM D 1895	25	s
Bulk density	ASTM D 1895	0.37	g/cm³
Surface hardness	ASTM D 2240	65	Shore D
Vicat softening point	ASTM D 1525	115	°C
Low-temperature brittle point	ASTM D 746	−60	°C

R2295HL rotomolding grade — PolyE New Material

R2295HL Rotomolding-grade modified PO High-impact PO grade

R2295HL is a rotomolding-grade modified PO powder for demanding structural parts such as missile storage cases, high-impact sailboats, whitewater boats and kart boats. Available in any color, UV8–UV20 stabilization, and optional antibacterial, anti-algae and antistatic packages.

Applications: Missile storage & transit casesHigh-impact sailboatsWhitewater & surf boatsHigh-impact kart boats

Higher rigidity than conventional HDPE
Higher toughness than conventional HDPE
Excellent impact resistance
Excellent processability

Property	Test standard	Typical value	Unit
Density	GB/T 1033	0.943	g/cm³
Melt flow rate	GB/T 3682 (190 °C, 2.16 kg)	2.4	g/10min
Tensile strength at break	GB/T 1040 (50 mm/min)	22	MPa
Elongation at break	GB/T 1040 (50 mm/min)	750	%
Impact strength	ARM	25	J/mm
Surface hardness	ASTM D 2240	66	Shore D
Vicat softening point	ASTM D 1525	124	°C
Flammability rating	UL-94	HB	—

Values are typical for the grade and are not a guarantee of supplied quality. Confirm final specifications in the TDS.

Typical properties (indicative)

Values below are typical for our modified PE families and are confirmed per grade in the TDS. Final properties depend on grade, wall thickness and process.

Property	Modified HDPE (typical)	Modified MDPE (typical)	Modified LDPE (typical)
Density (g/cm³)	0.94 – 0.96	0.93 – 0.94	0.91 – 0.93
Melt index (g/10min)	2 – 8	2 – 10	3 – 20
Impact strength	High	Very high	Medium-High
ESCR	Excellent	Very good	Good
Service temp.	-40 to 70 °C	-40 to 65 °C	-40 to 60 °C

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