Precautions for the hottest paper in binding

2022-09-19
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Notes on paper in binding

paper for binding books and periodicals, in addition to common relief, offset and coated paper, also includes paper, etc. To ensure the binding quality, different papers should be treated differently

1. Relief paper

a. any kind of folding machine can be used when folding, up to four folds (scoring); When folding four fold by hand, cut the crease on the third fold to eliminate the air in the book paste and ensure that the book paste is flat without wrinkles after folding

b. the maximum thickness of iron wire ordering is 15mm, the minimum is 8, the processing and distribution thickness is 0.5mm, and the diameter of iron wire is 0.5~0.84mm

c. a wide range of binders for letterpress paper. Relief paper is easy to adhere, and the viscosity of adhesive is easy, so the weight reduction effect is particularly outstanding

d cutter during cutting α The angle is the same as the paper

2. Offset paper

a. when bumping pages, any method can achieve a good effect of bumping pages neatly

b. any folding machine can complete good folding effect, especially suitable for high-speed folding

c. offset paper books and periodicals should be designed with less than three folds (never four folds). It is best to fold it for more than 8og/m2) and then paste it. Because the offset paper is thick, the quantity is large, and the number of folds is too many, the book sticker is easy to have splayed folds or dead folds that are not easy to unfold, resulting in uneven cuts and uneven quality problems of book blocks after cutting the book

d. when the number of pages of offset paper and letterpress paper is the same, the diameter of iron wire should be increased

e. the viscosity of the binder is larger (thicker) than that used for letterpress paper, because the offset paper has a large amount of weight, smooth surface, low viscosity (thin), and it cannot stick firmly or fall off after sticking

f. the hardcover book block of offset paper is not easy to be rounded and ridged, especially when the book sticker is thick. Because the offset paper is slippery, it is easy to expose each book sticker after rounding, and the front mouth circle appears a ladder shape; When ridging, the wrinkles in the crease cannot be flattened due to manual smashing, resulting in defective products

g. books and periodicals made of offset paper are generally of high grade, so the cover material should be better than the book block material to match the inside and outside of the book

3. Coated paper

232 plastic doors and windows A. any folding machine can be folded, but it can be folded three times at most, and there should be a cut to exhaust air. Fold two fold, one fold is the best (and then paste), to prevent the eight character wrinkles in the book sticker. Manual folding is generally two fold (and then paste) or one fold. The folding plate should not be sharp, and the scraper should not be too large to avoid scratches

b. the lock hole should not be too large (machine lock) or too deep (hand lock saw), so as to avoid wrong pasting of books or leakage of glue after gluing

c. the viscosity of the adhesive used should not be too large (when sticking a single page), subject to the fact that the surface coating will not be glued off after being glued firmly

d. the book should not be too thick when cutting, because the paper has a large sliding force, and it is easy to move wrongly after colliding. Cutter α The angle is the same as that of offset paper, generally 23 °

e. coated paper has a lot of fillers and is not resistant to folding. Once there are creases or scratches, it is not easy to restore flatness. It is easy to become brittle after exposure to the sun, and it is easy to adhere and mildew when exposed to moisture. Therefore, the temperature and relative humidity of plants and warehouses should be appropriate

4. Paper

a. paper folding, you can use any kind of folding machine, up to four folds (to scratch); When folding four fold manually, cut the crease on the third fold to exhaust the air and avoid wrinkles after folding the book. The jaw is a very important part of the experimental machine

b. after the pages are printed and the book post is processed, it is not suitable to put them in the sun, next to the heating, or in a wet place to avoid paper discoloration, brittleness, or inequality

c. the adhesive for sticking paper should not be too thin (because the paper has a large gap and is prone to water seepage), and the adhesion shall prevail

d. the thickness of iron wire stapling is 15mm at most and 0.5mm at least

e. when cutting books, the cutter α Generally, the angle can be 20 ° ~ 23 °

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