Fourth, cellulose adhesive materials
Cellulosic binders basically consist of a fiber-modified solution. Can bond paper, cardboard, cover, etc., have good adhesive properties.
(1) Carboxymethyl cellulose binder.
source:
Carboxymethyl cellulose is an ether of cellulose and glycolic acid, also known as paper wool paste. This adhesive material is a process that crushes paper hair by chemical treatment.
Features:
After drying, the carboxymethylcellulose adhesive has stronger bonding strength than the flour paste, good elasticity of the film, colorless and transparent, no fear of biting by insects, no deterioration, no precipitation, and long storage time. Its viscosity can be freely adjusted, and can be mixed with paste or polyvinyl alcohol to obtain a good bonding effect.
The drying speed of carboxymethyl cellulose binder is slower than that of starch-based adhesives, and the adhesive force at the beginning of the bonding is insufficient. As the moisture evaporates and dries, the adhesive strength gradually becomes stronger, and when it is completely dried, it is bonded. Good strength. Therefore, the pages or covers that are stuck during processing cannot be moved to avoid stickiness or looseness.
Usage:
Can replace the use of starch-based adhesive materials, such as bonding cover, paper, liner and so on.
(2) Methylcellulose binder.
Methyl cellulose is an ether of cellulose and methanol. The colloid is a white or beige sheet that dissolves in cold water. The surface tension decreases when dissolved. The glue will condense at 50°C, but it will recover after cooling. The solubility. Non-toxic, very good anti-bacterial, and also very stable to ultraviolet light.
In the post-printing process, methyl cellulose is often used to bond the cover and the like, and the glue is easy to apply, but it sometimes foams.
Some tributyl phosphate can be added to prevent blistering.
Fifth, synthetic resin adhesive material
Synthetic resins, also known as synthetic resins, are resins obtained by the polymerization or polycondensation of monomers. Synthetic resin adhesives often used in the post-printing process include: polyvinyl acetate, polyvinyl alcohol, 107 glue, EVA hot melt, and the like.
(1) Polyvinyl acetate (PVAC).
constitute:
Polyvinyl acetate is a polymer that is polymerized from vinyl acetate monomers. According to different polymerization methods, there are solution type and emulsion type, and the binding type is emulsion type. Because of its color, it is also called white glue or latex.
performance:
PVAC is a milky white viscous liquid, slightly acidic, soluble in a variety of organic solvents, and resistant to dilute acid and dilute alkali, is not afraid of insect bites, no mildew, is harmless to the human body. PVAC cured adhesive layer is colorless and transparent, it will not cause paper pollution, and it is easy to wash water-soluble emulsion, can be easily diluted, easy to use; PVAC plastic layer after drying toughness, cutting does not damage the blade, suitable for binding use .
The disadvantage is that this binder has poor water resistance and poor heat resistance.
Usage:
PVAC adhesives are used in a wide range of applications and are particularly suitable for the bonding of porous materials such as paper, fabric, leather, and wood.
PVAC adhesives can be used for single-sheet, double-sheet, pulp back, book back, book back, bag cover, lining, etc., and can have good results.
PVAC binders can be used in combination with flour pastes, carboxymethyl cellulose, etc. to increase the viscosity of the fluid while reducing costs.
PVAC is a water-soluble glue. Drying speed is similar to paste, it is slow, and it is not easy to set. If used to paste hardcover bookcases, the bookcase will cause warpage due to moisture penetration and short drying time.
The PVAC adhesive and the 504 resin blend can be bonded to a PVC coated coverstock. (to be continued)
Cellulosic binders basically consist of a fiber-modified solution. Can bond paper, cardboard, cover, etc., have good adhesive properties.
(1) Carboxymethyl cellulose binder.
source:
Carboxymethyl cellulose is an ether of cellulose and glycolic acid, also known as paper wool paste. This adhesive material is a process that crushes paper hair by chemical treatment.
Features:
After drying, the carboxymethylcellulose adhesive has stronger bonding strength than the flour paste, good elasticity of the film, colorless and transparent, no fear of biting by insects, no deterioration, no precipitation, and long storage time. Its viscosity can be freely adjusted, and can be mixed with paste or polyvinyl alcohol to obtain a good bonding effect.
The drying speed of carboxymethyl cellulose binder is slower than that of starch-based adhesives, and the adhesive force at the beginning of the bonding is insufficient. As the moisture evaporates and dries, the adhesive strength gradually becomes stronger, and when it is completely dried, it is bonded. Good strength. Therefore, the pages or covers that are stuck during processing cannot be moved to avoid stickiness or looseness.
Usage:
Can replace the use of starch-based adhesive materials, such as bonding cover, paper, liner and so on.
(2) Methylcellulose binder.
Methyl cellulose is an ether of cellulose and methanol. The colloid is a white or beige sheet that dissolves in cold water. The surface tension decreases when dissolved. The glue will condense at 50°C, but it will recover after cooling. The solubility. Non-toxic, very good anti-bacterial, and also very stable to ultraviolet light.
In the post-printing process, methyl cellulose is often used to bond the cover and the like, and the glue is easy to apply, but it sometimes foams.
Some tributyl phosphate can be added to prevent blistering.
Fifth, synthetic resin adhesive material
Synthetic resins, also known as synthetic resins, are resins obtained by the polymerization or polycondensation of monomers. Synthetic resin adhesives often used in the post-printing process include: polyvinyl acetate, polyvinyl alcohol, 107 glue, EVA hot melt, and the like.
(1) Polyvinyl acetate (PVAC).
constitute:
Polyvinyl acetate is a polymer that is polymerized from vinyl acetate monomers. According to different polymerization methods, there are solution type and emulsion type, and the binding type is emulsion type. Because of its color, it is also called white glue or latex.
performance:
PVAC is a milky white viscous liquid, slightly acidic, soluble in a variety of organic solvents, and resistant to dilute acid and dilute alkali, is not afraid of insect bites, no mildew, is harmless to the human body. PVAC cured adhesive layer is colorless and transparent, it will not cause paper pollution, and it is easy to wash water-soluble emulsion, can be easily diluted, easy to use; PVAC plastic layer after drying toughness, cutting does not damage the blade, suitable for binding use .
The disadvantage is that this binder has poor water resistance and poor heat resistance.
Usage:
PVAC adhesives are used in a wide range of applications and are particularly suitable for the bonding of porous materials such as paper, fabric, leather, and wood.
PVAC adhesives can be used for single-sheet, double-sheet, pulp back, book back, book back, bag cover, lining, etc., and can have good results.
PVAC binders can be used in combination with flour pastes, carboxymethyl cellulose, etc. to increase the viscosity of the fluid while reducing costs.
PVAC is a water-soluble glue. Drying speed is similar to paste, it is slow, and it is not easy to set. If used to paste hardcover bookcases, the bookcase will cause warpage due to moisture penetration and short drying time.
The PVAC adhesive and the 504 resin blend can be bonded to a PVC coated coverstock. (to be continued)
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