Just for the record, this is not from the sound of a cat. It is a type of adhesive used by book binding experts. PUR (Poly Urethane Reactive) Glue lasts longer than the hot melted and the cold emulsion glues. It is clear and withstands any temperature. Only a little is needed for a good bind. Hot melt glue used to be used in book binding. However, it lost its strength with time. This was not ideal for books that were to be preserved for a long time. This continued until 1980 when a new discovery was made.
PUR Glue has many advantages. It is strong, flexible and is not affected mesaproducts by water. It is cheap and unaffected by the environment. Most museum and library books are bound using this adhesive. It is three times stronger than ordinary glue. It can therefore preserve valuable books for years. The difficulties associated with hot melted glue are overcome.
This book binding adhesive needs 24 hours for curing. There’s now a new formula that allows the glue to cure fast. It is a slow but sure way of binding your books. It should be handled at the correct temperature and under good ventilation. The adhesive contains Methylene Diphenyl Disocynate (MDI) that causes respiratory problems on prolonged exposure. This adhesive contains lower levels of MDI compared to the hot melt glues.
PUR glue is an excellent but costly tool for binding. Before use, read the product’s manual. Use the product at the correct temperature and avoid skin contact. This glue can be used at high temperatures. Up to 200F is permissible. The adhesive is unaffected by the migration if ink vehicles. It is durable and never loses its strength.