Polyurethane flexible foam refers to a type of flexible polyurethane foam with a certain elasticity, and it is one of the largest polyurethane products. The main products include high resilience foam (HRF), splimp sponge, slow resilience foam, integral skin foam (ISF), and semi-rigid energy-absorbing foam.

The cell structure of polyurethane flexible foam is mostly open-cell. Generally, it has the properties of low density, good elastic recovery, sound absorption, breathability, heat preservation, etc., and is mainly used as furniture cushion material, transportation seat cushion material, and various soft cushion laminated composite materials. It is also used as filter materials, sound insulation materials, shockproof materials, decorative materials, packaging materials and thermal insulation materials in Industrial and civil areas.

With the growing market demand for polyurethane flexible foam, some common problems in the production process have attracted the attention of producers.

Here are some common problems and solutations (in the vertical foaming line) to share with you: