Non-combustible cardboard [adhesive]

Starch was added to a 23% aqueous soufa solution to prepare a coating type flame retardant. It is applied to the following cardboard and the degree of combustion is considered.

Application method

The photograph after coating and drying is shown.

A 45 ° C combustion test was performed.
The test machine is as follows.

Test results


The flame did not penetrate and was able to withstand the 5-minute burn test. It is believed that the foam and carbonized layers of soufa prevented the combustion.

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