Yamahachi Porous Roller is a roll-shaped porous material with great features such as flexibility, permeability, venting, collectability, hydrophobic, and low dust generation (lint-free) which can be produced using a base material with Polyethlene (PE).

This material absorbs liquids such as oil and ink, and is effective especially for liquid application. We can provide custom-made products not only simple roller shapes but also special shapes such as gear shapes. Option processing or adjustment such as surface processing (closing entire/partly pores of surface), and/or the physical property adjustments required are also available.

What is open-cell porous plastic？

 Basic properties 

Material： LDPE	Pore size（μm）：5 – 30μm (random)
Heat resistance temperature（℃）：50-100℃	Porosity（％）：60 – 80％

Flexibility	Flexible and does not damage the surface or workpiece
Permeability	Penetrate into oil and ink
Ventilation	Passes air or gas
Hydrophobic	This product has weak interaction with water and does not absorb water or moisture
Durability	Polyethylene-based material , highly durable
Lint-free	No fiber material used. Low dust generation material that does not cause the base material to fall off.
Chemical resistance	Highly resistant to acids and alkalis, and relatively resistant to oils and organic solvents.
Dimension (mm)	Outer diameter φ6 ~ φ50mm x Inner diameter φ2.5mm ~ x Length ~100mm

 Options 

Material：HDPE、EVA、PP	Adjustment of hardness	Adjustment of porosity	Hydrophilization
Special shape (gear)	Double-layer	Surface processing (partly)	Surface processing (entirely)

 Kind of Porous structures 

We design the porous structure according to the customer’s physical properties and applications.

Kind	Overview
Standard structure	Continuous porous structure connected in a three-dimensional network. The walls between the pores are open, providing vent and liquid permeability.
Double-layer	Double layers of porous material with different pore sizes formed into a roller shape. The inner layer has a high porosity, and the surface layer has fine and dense pores.
Surface processing (partly)	Partially processed porous surface in roll shape. Air/gass and liquid do not pass through the processed parts, but the unprocessed parts maintain their porous function with vent and peamiability. Detailed designs such as dot patterns can be processed on the surface, and functions such as applying a small amount of oil can also be added.
Surface processing (entirely)	The entire surface is processed to seal the entire pores on the surface. The inner layer retains its porous function with features of vent and peamiability, and the processed surface layer does not allow ventilation or liquid to pass through.

Standard structure	Double-layer	Surface processing (partly)	Surface processing (entirely)

 Applications 

Lubricant applicator roller

Ink roller

Absorbent material

Absorbent roller material with oil and ink

Marking materials

This product is basically custom order and/or development. Based on the application and the customer’s required physical properties and specifications, we will conduct trials and production that bring the best porous material to the customer.

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