Polyurethane sandwich panel is a kind of high-performance building material primarily composed of three layers: two layers of high-strength metal sheets (such as color-coated steel plates, aluminum plates, etc.) serving as the face sheets, and a core material filled with rigid polyurethane foam. The polyurethane foam is injected between the two metal sheets through high-pressure foaming technology, forming a sturdy sandwich structure with exceptional insulation and thermal barrier properties.

We shared some common problems and solutions in the production process of polyureyhane elastomers last time; Below we will comtinue to share more problems and solutions that attract the attention of producers.

Polyurethane elastomer is a high-performance elastomer with the characteristics of abrasion resistance, cutting resistance, tear resistance, high load-bearing capacity, transparent or translucent, ozone resistance, potting, pouring, and a wide range of hardness. It is widely used in transportation, sports, medical, electronic equipment, military aerospace, machinery manufacturing and other industries.

The conventional design of the top insulation of the cold storage often adopts the 200 mm thick rigid polyurethane foam sprayed along the roof beam plate, referred to as the polyurethane insulation layer, and the surface of the insulation layer is painted with polymer mortar (steel wire mesh) and other structural practices.

Rebonded foam is made from reclaimed foam & scrap foam.It has the following advantages.

Polyurethane rigid foam with thermal insulation effect is widely used in refrigerators and freezers, but there are many problems encountered in the foaming process, and the following is the analysis of some common problems

Carbon dioxide is produced in large quantities as a by-product of many industrial processes, resulting in a sustained increase in atmospheric carbon dioxide concentrations above 420 ppm. This increase has raised serious concerns about climate change and prompted global efforts to mitigate its impacts.

The yellowing of polyurethane sponge has always been a problem that plagues sponge manufacturers and polyol manufacturers. Many sponge manufacturers, especially some high-end sponge manufacturers, have tried to improve the anti-yellowing performance of sponge by adding antioxidants and light stabilizers, but the results are not significant. In this article, we will analyze the causes of yellowing of sponge systematically based on the upstream and downstream characteristics of polyol and sponge production, and elaborate the corresponding solutions.

Flexible polyurethane foam is a polymer produced from the reaction of polyols and isocyanates. It is characterized by a cellular structure with low density, good elastic recovery, sound absorption, air permeability, heat preservation and other properties.