Skin delamination of a polyurethane insole

Description:

If insoles are difficult to demould, detachment of the surface can be the result.

Affected Foam Parts:

Affected are shoe insoles.

What causes it:

Such skin peeling is often caused by the release agent – if it has too little slip, or is applied improperly, demoulding the insole becomes a challenge. In addition, the wrong processing parameters, the wrong mould temperature, contamination in the mixing head or poor mixing of the PU system can lead to skin delamination.

• Not enough slip of mould release
• Improper application of mould release
• Improper PU processing parameter
• Contamination in mixing head
• Improper mixing of polyurethane foam system
• Improper mould temperature

Solutions:

Adjusting the amount of release agent and the atomization pressure often helps to avoid skin delamination. The choice of a release agent with stronger slip properties can also avoid skin peeling. Furthermore, checking the processing parameters and the mould temperature can eliminate sources of error.

• Adjust the amount of sprayed Release Agent and/or atomization pressure
• Choose mould release with more slip
• Check PU processing parameters
• Check mould temperature

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