The Difference Of The PIR Or PUR

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/How to distinguish whether the polyurethane sandwich panel is PIR or PUR?

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How to distinguish whether the polyurethane sandwich panel is PIR or PUR?

Dec 24, 2021

PUR and PIR refer to the chemical composition and structure of rigid polyurethane foam. Either PUR or PIR can be used as a core material and a variety of rigid or flexible materials as the surface material to be composited by various processing methods.
PUR composite panel refers to the polyurethane rigid foam as the core material, which generally adopts a formula system of polyether polyol, lower isocyanate index and flame retardant. The skeleton structure of the foam is composed of urethane segments. It can only be used below 100 degrees Celsius.
PIR composite panel refers to the polyurethane rigid foam as the core material, which generally uses polyester polyol, high isocyanate index (above 250), and uses no or less flame retardant formula system. The skeleton structure of the foam is made of urethane The product is composed of the chain segment and the urethane modified isocyanurate segment together, and the product can be used below 150 degrees Celsius.

In today's industrial system, there is an increasing demand for PIR polyurethane panels. Recently, many customers are looking for PIR polyurethane cold storage board, so what is PIR polyurethane cold storage board? Talk to everyone today. The so-called PIR polyurethane cold storage board means that the combustion grade of the polyurethane sandwich panel reaches the B1 level.

When it comes to fire rating, I have to mention the old standard GB8624-1997. This is an earlier standard for building fire protection materials. This is described in the standard:
Class A: Non-combustible materials (such as rock wool, stone, etc.)
Class B1: Flame-retardant materials (such as: polyurethane, polystyrene)
Class B2: combustible materials (polyurethane, polystyrene)
Class B3: Flammable materials (extruded polystyrene, polyurethane, etc.)

Polyurethane is found in B1, B2, and B3 materials. Back to the topic, polyurethane cold storage board, as a better insulation material today, has been widely used in the construction of cold storage in our production and life. Polyurethane materials are materials for agricultural production systems. Only inorganic materials can achieve Class A non-combustibility. We have already mentioned this in previous exchanges. Therefore, the higher combustion level of polyurethane materials can reach B1 level.

Question:What is clean room panels made of?

Answer:Clean room panel, also known as clean board, is a composite board with color-coated board, stainless steel and other materials as the surface material.