ISO-LEN® Lining Solution

ISO-LEN® ultra-high-molecular-weight polyethylene (PE) liner is a non-toxic plastic liner with low friction, high impact strength and good abrasion.

Depending on application requirements and the type of bulk material, we offer a variety of designs to meet your needs. Please contact us for further details.

Versatile lining material

The ISO-LEN® liner’s unique properties are well known by bulk handling industries and is often recommended by mass flow design engineers and bulk handling consultants as a lining material.


The lining material promotes mass flow and at the same time protects the structural walls of tanks, hoppers and bunkers against abrasive wear.


These plastic liners are used for mining, cement, coal handling (coal bunker lining), food, radiation, silo tanks, hoppers, storage tanks and more.

Advantages of plastic liners

  • Eliminate corrosion

  • Minimize material choking

  • Minimize material bridging

  • High impact resistance

  • Non-sticking

  • Noise reduction

  • Main structure protection

  • Low friction angle

  • Cost-saving

Application examples

  • Chute lining

  • Coal bunker lining

  • Silo tank lining

  • Sewage pipe lining

  • Grain silo lining

  • Gypsum silo lining

  • Sieve plate

  • Wear plates

  • Hopper liner

  • Trucking lining

  • Railway cart liner

Bridging /Arching Problem

Only the cone portion of the bulk material is moving during discharge. Content in the silo bridging faces flow stoppage.

Funnel Flow

Only the centre portion of the bulk material is moving during discharge. The flow rate is unpredictable and material segregation and stoppage can be expected.

Mass Flow

All bulk material is moving during discharge. The flow rate is predictable, material segregation is minimized and complete discharge can be expected.

Installation – Fastening methods and layouts

Drill-through method
The drill-through fastening method is highly effective and economical, but not suitable for handling bulk material with liquid content and corrosion material.

Expansion bolt method
The expansion bolt or counter sunk screw with stradding dowel is one of the most efficient methods for mounting liners on concrete walls.

Welding stub method
The welding stub is a fast and efficient method for mounting liners on a metal or steel wall, but requires special tools like stub welding guns and ceramic brokable cups, which increases installation costs.

Other methods:
Welding washer: Typically for thinner sheets
Riveting: Typically for fixing onto steel walls
Power nail: Typically for fixing onto wooden walls
Chemical bolt: Typically for mounting on concrete

Sealing strip and edge protector

ISO-LEN lining material’s sealing strip and edge protector is an important part of its design. There are several factors to be considered. Firstly, the lining material and tank or chute wall have different thermal expansion rates. Therefore, there has to be sufficient expansion gaps to account for drastic temperature changes. Secondly, the edge of the liner is relatively weak. Should the liner edge be lifted up, bulk material may accumulate between the liner and tank or chute wall. The edge protector prevents this.

ISO-LEN 1000 ( GUR 4120 ) 100 PTFE 530
ISOMOL 78 Polypropylene (PP) 660
Cast Nylon ( PA6G) 150 PMMA ( Acrylic ) 1800
PE-HD (high molecular weight PE ) 400 Phenolic Fiber 2500
POM-copolymer 700 Stainless Steel 160
Polyvinyl Chloride (PVC) 920 Beech Wood 2700
Extruded Nylon 66 (PA 66) 160 Epoxy Resin ( 50% quartz) 3400

Note: Sand slurry test method as per ISO 15527 is a well-recognized test method for a material’s relative volumetric wear rate. The data provides a good indicative wear abrasion rate of different materials, and the data above shows the wear resistance of ISO-LEN 1000 against other common lining materials.

Limestone (Dry) Up to 5 32.2 17.6
Limestone (4% moisture) 45-65 79 58
Limestone (Dry) 60-120 37.3 29 14.8
Gypsum (7% moisture) 50-200 No flow No flow 73
Soft-Burnt Lime 10-40 34.3 31.2 5.7
Raw Gypsum (Dry) 0-2 36.1 34.8 11
Sub-bituminous Coal (35% moisture) Random 74 64
Sub-bituminous Coal (33% moisture) Random 76 60

Note: There are economical benefits to building a hopper and silo with lower wall angles having mass flow. The cost savings can be significant; the building structure height and its downstream facilities’ structure height are both reduced.