U.S. Adhesives Perfect Binding (Hot Melt) Problem Solver Page

Perfect Binding (Hot Melt) Problem Solver

Glue

Type

HM-1 Fast Set Single Clamp Sulby 4-5 Sec.
HM-2 Slow Set Multi Clamp Sulby 10-12 Sec.

Temperature

350º F. Normal Paper
375º F. Coated Paper if necessary

Amount

15 to 20 Thousandth of an inch looking at trimmed edge of back bone

Paper / Signature

Type

Clay, coated, enamel papers are harder to stick

Thickness

Above 40 LB., paper is harder to stick

Grain

IMPORTANT: Grain should run parallel to back bone (long grain). Perpendicular (short grain) will reduce page pull 25%.

Temperature

Paper should be at room temperature 72º F.

Paper / Cover

Type

The area inside the cover at the back bone should not be coated

Temperature

Cover stock should be at room temperature 72º F.

Temperature Near The Binder

Should be operated at room temperature 72º F. or above. It is important there are no cold drafts on the binder.

Coverage of Hot Melt

1 LB. of hot melt (15 to 20 thousandth of an inch thick) will make 756 sq. in. of back bone.

Example:

12 inch Book, 1 inch thick = 12 sq. in.

756/12 = 63 books (approx.)