Wireless glue binding refers to a solid back binding method in which each leaf of a poster sheet is adhered to each other along the opening by means of a glue substance. The whole process of binding from the page to the book is completed automatically on one machine. Obviously, this process method greatly shortens the process flow of bookbinding, reduces duplication of labor and improves production efficiency. Bindery is a bookbinding process developed in Europe in the early 1950s. China began to use wireless glue binding in the early 60s. The wireless glue binding is the same as the sewing thread binding and has the advantages of convenient reading and not occupying the mouth. The book block processed by the wireless glue binding can be used for both flat and hardcover, and is a widely used book setting method. .
First, wireless glue binding method
There are many methods of wireless glue binding, generally can be divided into: cut-hole glue binding method; milling back hair glue binding method; slotted glue binding method; single page glue binding method.
1. Cut-hole glue binding method. When a printed page is folded on a folding machine, a hole is punched along the fold line of the last fold of the signature with a hole-punching knife (also known as a flower wheel knife). After being folded, the cutout is flared outside the inside and outside to form a bell mouth. . After being affixed, flattened, and bundled, adhesive material is applied to the back of the book. The glue penetrated through the hole in the spine to every page in the signature, so that the cut holes in each page firmly adhered to each other. Thicker books (generally about 20mm) also stick the gauze and paperboard, and after drying, it becomes a wireless glue binding book block.
Cut-hole glue binding method applies to 8 open and 16 open signatures, punching length is generally 15 ~ 28mm, the distance between the mouth and mouth is generally 3 ~ 5mm, the depth of the mouth to draw through the text.
The quality of the book block made by the colloidal binding method depends on the type of paper, the number of pages in the book block, and the nature of the glue. When using this glue method, in order for the glue to permeate every page in the signature, the pages in the signature must be glued and the glue must have a low viscosity. Generally, the method of adding water to dilute the glue to achieve the required viscosity, so the resulting adhesive layer is very thin, which greatly reduces the adhesion fastness and at the same time increases the drying time. This binding method does not allow the book block to obtain an equal strength structure, and in particular, the pages in the signature cannot be firmly and reliably bonded, and does not apply to the binding of 32 open signatures. Therefore, this binding method has certain limitations. Sex.
2. Milling back hair glue binding method. The pages with good pages will be clipped, clamped, and the backs of the books will be leveled with the knife along the setback. The depth of back-milling will vary depending on the thickness of the paper and the number of folds of the signatures. The calculation should be based on milling to form a single page. , and then brushing the milled book brush, or milling into a number of small ditch, the depth is generally 0.8 ~ 1.5mm, the interval is 3 ~ 5mm, the adhesive material is painted on the back surface of the book, and the slot ditch irrigation Full of glue to increase adhesive fastness. Then paste the gauze, cardboard, that is, become a wireless glue bookbinding. Figure 4-8 is a schematic diagram of a book with a milled back-bonded binding book block.
3. Grooved glue binding method. The slotted type is the same as the hole type adhesive binding method. It is performed on a folding machine, but the cut-out slot is large, as shown in Fig. 4-9. After the slotted signatures are assembled into book blocks, the glue can be applied directly. There is no special requirement for glue. This method can not only make the glue applied to the cuts of the signature pages, but also can be applied to the side of the cuts. The signatures can be glued to each other by sticking to each other through the steps between the cut grooves. Big firmness.
4. Single page glue binding method. The book takes a single leaflet or a folded book as a unit, and after setting the mouth together, the staggering of the pages is evenly staggered by about 1.5 to 2mm, placed on the table, and evenly brushed with glue, and then Hit along the opening and pressurize it so that pages and pages are connected to each other as book blocks. The book blocks bonded by this method are very firm. For this reason, some exquisite albums and book blocks of the atlas are often processed by this glue method.
Second, wireless glue binding quality requirements
According to the provisions of the national industry standard CY/T28-99, the quality of wireless glue binding should meet the following requirements:
Milling back depth: Three fold quotes are 2.0 ~ 3.0mm, four fold quotes are 2.5 ~ 3.5mm, skew angle ≤ 2.0mm.
Letters and mouthpieces: They should be arranged neatly, all on the last crease line, and penetrate the adhesive.
Sawing mouth: 64 open book core sawing number is 4, 32 open book core sawing number is 6-8, 16 open book core sawing number is 8-10. Sawing depth 2 ~ 3mm, width 1.5mm ~ 2.5mm.
Milling backs and sawings are based on the glue on the innermost page.
Backing paper for sticky books: The thickness of the book block should be greater than 15mm, and the backing paper should be adhered. For papers no longer than 15mm, the backing paper can be attached. Book cover paper with over 150g/m2 of non-stick paper.
The length of the book backing paper glued using the glue-adhesive linkage shall be 5 to 10 mm longer than the length of the book block, and the width shall be the same as the width of the back of the book or both sides shall be less than 1 mm from the back of the book. The length of the hand-fed book back paper should be longer than the length of the book bundle 20 to 40 mm, and the width should be the same as the length of the book block, with a tolerance of 3 mm.
When pasting the back of the book, the shrinkage of the book block of the head or feet should not exceed 2.5 mm, and the backing of the book should not exceed 1.0 mm. After sticking the back of the book, the back of the book is based on the length of the book block, with a tolerance of 3 mm. Stick, stick, break, and skew.
Transcript: The division is correct, the back of the book is not broken, and the page should not be cut off.
Package and setting: The width of the side glue for the mechanical attachment cover is 3 to 7mm. The size of the adhesive cover should be correct, sticky, sticky, and sticky. The back cover of the book and the version of the frame are subject to the cover page, with an error of 15% below 100 pages and an error of 10% over 100 pages.
After the book is shaped, the back of the book is flush and the alignment does not exceed 1 mm. The cover is non-sticky and has no knuckles.
Adhesive: The viscosity is appropriate, the back of the book and the cover paper are glued, and the adhesive does not overflow.
Third, the impact of wireless glue fastness factor
The factors that affect the fastness of wireless glue are: the quality of the back surface processing of the book, the temperature of the hot melt adhesive, the thickness of the back glue, the degree of compression of the cover and the back of the book, and so on.
1. The quality of the work done on the back of the book. The quality of the book's back milling and roughening is the main factor that affects the fastness of the wireless glue book. The quality of the book back surface processing is characterized by the macro and micro geometry of the paper back surface, which can be represented by the average arithmetic value of the paper end macro slippage. . In the process of milling and roughing the back of the book, the fibers on the edge of the paper are loosened and a rough surface is formed. The glue penetrates the fibers along the surface of the paper and adheres to each other. The back of the book is not roughened, the milling cuts are smooth, and the paper and glue adhesive surfaces are small, so that the glue in the paper can not be guaranteed to infiltrate and adhere. After the back of the book is roughened, the surface is too rough. Similarly, the glue is not easy to infiltrate in the paper, because paper and air are accumulated on the back surface of the book to prevent the glue from contacting the paper. Using a blunt knife to mill the book back creases results in a rough book back surface, which also affects the fastness of the adhesive.
2. The temperature of the hot melt adhesive. Different types of hot-melt adhesives have different bonding properties. For the same hot-melt adhesive, as the temperature increases,
The lower the stickiness, the better the wetting of the glue between the back of the book that is scratched and the book page, and the better the fastness of the adhesive. When the temperature is too high, the polymer, which is the main component of the hot melt adhesive, may undergo thermal depolymerization, thereby lowering the adhesiveness of the hot melt adhesive. If the temperature is too low, the fluidity of the glue is poor, which affects the adhesive fastness of the glue. At present, the hot melt adhesive commonly used in printing plants is at 170°C～1.
It has good viscosity and wettability at 85°C, so it needs to be heated and kept at a constant temperature during use.
3. The thickness of the adhesive layer. As the thickness of the hot melt adhesive layer increases, the adhesive fastness increases. Figure 4-10* shows the wireless glue bookbinding core made of two relief papers, with the increase in the adhesive layer thickness (from 0.3 to 0.9mm) increased adhesion fastness. As can be seen from the figure, when the thickness of the adhesive layer increases to a certain value, the adhesive fastness begins to decrease. This shows that the use of too thick hot melt adhesive layer not only wastes glue, but also reduces the adhesive fastness and also destroys the overall structure of the book.
The thickness of the hot melt adhesive should be determined according to the thickness of the publication, the type of printing and cover paper, and the type and quality of the hot melt adhesive. Generally speaking, in the case of the latter two conditions being basically the same, the fastness of the perfect binding depends on the thickness of the book block. Figure 4-11 shows the change in the bond fastness of book blocks of different thicknesses as the number of book block openings increases. Regardless of whether the fiber orientation of the paper is parallel to the back of the book block, the thin book block has the best fastness, followed by the middle thickness of the book block, and the thickest book block has a poor bond fastness. The results of this study indicate that for different thicknesses of book blocks, the appropriate adhesive layer thickness should be selected.
For example, a thickness of 0.4 mm is sufficient for a book with a thickness of 10 to 12 mm printed using letterpress paper. For publications with a thickness of 20 mm and thicker, the hot melt adhesive thickness must reach 0.8-1.0 mm.
The extent to which the cover and the book block are pressed. The cover should be firmly bonded to the back of the book and all parts on both sides of the book, and no wrinkles should appear. The back of the book should be neatly rectangular.
First, wireless glue binding method
There are many methods of wireless glue binding, generally can be divided into: cut-hole glue binding method; milling back hair glue binding method; slotted glue binding method; single page glue binding method.
1. Cut-hole glue binding method. When a printed page is folded on a folding machine, a hole is punched along the fold line of the last fold of the signature with a hole-punching knife (also known as a flower wheel knife). After being folded, the cutout is flared outside the inside and outside to form a bell mouth. . After being affixed, flattened, and bundled, adhesive material is applied to the back of the book. The glue penetrated through the hole in the spine to every page in the signature, so that the cut holes in each page firmly adhered to each other. Thicker books (generally about 20mm) also stick the gauze and paperboard, and after drying, it becomes a wireless glue binding book block.
Cut-hole glue binding method applies to 8 open and 16 open signatures, punching length is generally 15 ~ 28mm, the distance between the mouth and mouth is generally 3 ~ 5mm, the depth of the mouth to draw through the text.
The quality of the book block made by the colloidal binding method depends on the type of paper, the number of pages in the book block, and the nature of the glue. When using this glue method, in order for the glue to permeate every page in the signature, the pages in the signature must be glued and the glue must have a low viscosity. Generally, the method of adding water to dilute the glue to achieve the required viscosity, so the resulting adhesive layer is very thin, which greatly reduces the adhesion fastness and at the same time increases the drying time. This binding method does not allow the book block to obtain an equal strength structure, and in particular, the pages in the signature cannot be firmly and reliably bonded, and does not apply to the binding of 32 open signatures. Therefore, this binding method has certain limitations. Sex.
2. Milling back hair glue binding method. The pages with good pages will be clipped, clamped, and the backs of the books will be leveled with the knife along the setback. The depth of back-milling will vary depending on the thickness of the paper and the number of folds of the signatures. The calculation should be based on milling to form a single page. , and then brushing the milled book brush, or milling into a number of small ditch, the depth is generally 0.8 ~ 1.5mm, the interval is 3 ~ 5mm, the adhesive material is painted on the back surface of the book, and the slot ditch irrigation Full of glue to increase adhesive fastness. Then paste the gauze, cardboard, that is, become a wireless glue bookbinding. Figure 4-8 is a schematic diagram of a book with a milled back-bonded binding book block.
3. Grooved glue binding method. The slotted type is the same as the hole type adhesive binding method. It is performed on a folding machine, but the cut-out slot is large, as shown in Fig. 4-9. After the slotted signatures are assembled into book blocks, the glue can be applied directly. There is no special requirement for glue. This method can not only make the glue applied to the cuts of the signature pages, but also can be applied to the side of the cuts. The signatures can be glued to each other by sticking to each other through the steps between the cut grooves. Big firmness.
4. Single page glue binding method. The book takes a single leaflet or a folded book as a unit, and after setting the mouth together, the staggering of the pages is evenly staggered by about 1.5 to 2mm, placed on the table, and evenly brushed with glue, and then Hit along the opening and pressurize it so that pages and pages are connected to each other as book blocks. The book blocks bonded by this method are very firm. For this reason, some exquisite albums and book blocks of the atlas are often processed by this glue method.
Second, wireless glue binding quality requirements
According to the provisions of the national industry standard CY/T28-99, the quality of wireless glue binding should meet the following requirements:
Milling back depth: Three fold quotes are 2.0 ~ 3.0mm, four fold quotes are 2.5 ~ 3.5mm, skew angle ≤ 2.0mm.
Letters and mouthpieces: They should be arranged neatly, all on the last crease line, and penetrate the adhesive.
Sawing mouth: 64 open book core sawing number is 4, 32 open book core sawing number is 6-8, 16 open book core sawing number is 8-10. Sawing depth 2 ~ 3mm, width 1.5mm ~ 2.5mm.
Milling backs and sawings are based on the glue on the innermost page.
Backing paper for sticky books: The thickness of the book block should be greater than 15mm, and the backing paper should be adhered. For papers no longer than 15mm, the backing paper can be attached. Book cover paper with over 150g/m2 of non-stick paper.
The length of the book backing paper glued using the glue-adhesive linkage shall be 5 to 10 mm longer than the length of the book block, and the width shall be the same as the width of the back of the book or both sides shall be less than 1 mm from the back of the book. The length of the hand-fed book back paper should be longer than the length of the book bundle 20 to 40 mm, and the width should be the same as the length of the book block, with a tolerance of 3 mm.
When pasting the back of the book, the shrinkage of the book block of the head or feet should not exceed 2.5 mm, and the backing of the book should not exceed 1.0 mm. After sticking the back of the book, the back of the book is based on the length of the book block, with a tolerance of 3 mm. Stick, stick, break, and skew.
Transcript: The division is correct, the back of the book is not broken, and the page should not be cut off.
Package and setting: The width of the side glue for the mechanical attachment cover is 3 to 7mm. The size of the adhesive cover should be correct, sticky, sticky, and sticky. The back cover of the book and the version of the frame are subject to the cover page, with an error of 15% below 100 pages and an error of 10% over 100 pages.
After the book is shaped, the back of the book is flush and the alignment does not exceed 1 mm. The cover is non-sticky and has no knuckles.
Adhesive: The viscosity is appropriate, the back of the book and the cover paper are glued, and the adhesive does not overflow.
Third, the impact of wireless glue fastness factor
The factors that affect the fastness of wireless glue are: the quality of the back surface processing of the book, the temperature of the hot melt adhesive, the thickness of the back glue, the degree of compression of the cover and the back of the book, and so on.
1. The quality of the work done on the back of the book. The quality of the book's back milling and roughening is the main factor that affects the fastness of the wireless glue book. The quality of the book back surface processing is characterized by the macro and micro geometry of the paper back surface, which can be represented by the average arithmetic value of the paper end macro slippage. . In the process of milling and roughing the back of the book, the fibers on the edge of the paper are loosened and a rough surface is formed. The glue penetrates the fibers along the surface of the paper and adheres to each other. The back of the book is not roughened, the milling cuts are smooth, and the paper and glue adhesive surfaces are small, so that the glue in the paper can not be guaranteed to infiltrate and adhere. After the back of the book is roughened, the surface is too rough. Similarly, the glue is not easy to infiltrate in the paper, because paper and air are accumulated on the back surface of the book to prevent the glue from contacting the paper. Using a blunt knife to mill the book back creases results in a rough book back surface, which also affects the fastness of the adhesive.
2. The temperature of the hot melt adhesive. Different types of hot-melt adhesives have different bonding properties. For the same hot-melt adhesive, as the temperature increases,
The lower the stickiness, the better the wetting of the glue between the back of the book that is scratched and the book page, and the better the fastness of the adhesive. When the temperature is too high, the polymer, which is the main component of the hot melt adhesive, may undergo thermal depolymerization, thereby lowering the adhesiveness of the hot melt adhesive. If the temperature is too low, the fluidity of the glue is poor, which affects the adhesive fastness of the glue. At present, the hot melt adhesive commonly used in printing plants is at 170°C～1.
It has good viscosity and wettability at 85°C, so it needs to be heated and kept at a constant temperature during use.
3. The thickness of the adhesive layer. As the thickness of the hot melt adhesive layer increases, the adhesive fastness increases. Figure 4-10* shows the wireless glue bookbinding core made of two relief papers, with the increase in the adhesive layer thickness (from 0.3 to 0.9mm) increased adhesion fastness. As can be seen from the figure, when the thickness of the adhesive layer increases to a certain value, the adhesive fastness begins to decrease. This shows that the use of too thick hot melt adhesive layer not only wastes glue, but also reduces the adhesive fastness and also destroys the overall structure of the book.
The thickness of the hot melt adhesive should be determined according to the thickness of the publication, the type of printing and cover paper, and the type and quality of the hot melt adhesive. Generally speaking, in the case of the latter two conditions being basically the same, the fastness of the perfect binding depends on the thickness of the book block. Figure 4-11 shows the change in the bond fastness of book blocks of different thicknesses as the number of book block openings increases. Regardless of whether the fiber orientation of the paper is parallel to the back of the book block, the thin book block has the best fastness, followed by the middle thickness of the book block, and the thickest book block has a poor bond fastness. The results of this study indicate that for different thicknesses of book blocks, the appropriate adhesive layer thickness should be selected.
For example, a thickness of 0.4 mm is sufficient for a book with a thickness of 10 to 12 mm printed using letterpress paper. For publications with a thickness of 20 mm and thicker, the hot melt adhesive thickness must reach 0.8-1.0 mm.
The extent to which the cover and the book block are pressed. The cover should be firmly bonded to the back of the book and all parts on both sides of the book, and no wrinkles should appear. The back of the book should be neatly rectangular.
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