Introduction and characteristics of solid glue
Solid glue is a kind of polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), acrylic resin, vinyl acetate resin, and other one or more polymer materials as adhesives, fatty acid salts as excipients, glycerin, Propylene glycol, ethylene glycol, etc. are moisturizing and antifreeze agents, water is the solvent, reacting in an environment of 70°C to 90°C, filling and cooling the solid adhesive prepared. Mainly used for pasting various papers. Adding a pH developer such as phenolphthalein can make a phantom color solid gel, the gel is purple or blue, and the color disappears after a few seconds of applying the gel. Adding water-soluble dyes can be made into colored solid glues of various colors, and the transparency of the colloid can be adjusted by an appropriate amount of modifier, so as to obtain translucent or highly transparent solid glues.
Solid glue is a new product in adhesives. Its main features are: easy to obtain raw materials, simple production, long shelf life, easy to carry, easy to use, strong bonding, suitable for paper bonding.
Advantages of solid glue
Solid adhesive (solid glue) is a kind of ideal and beautiful adhesive. It is to inject hot liquid into the mold and turn it into a solid after cooling and put it into a lipstick tube to form a solid adhesive.
(1) It is convenient to carry and use, and the appearance is like lipstick for makeup. When using, twist the base body and apply after the glue stick is slightly exposed.
(2) It does not pollute the area other than the bonding surface, and the tissue paper will not soak.
(3) Strong adhesion, and can maintain the adhesiveness for a long time. The production is simple, the raw materials are easy to buy, and the cost is low.
Uses and technical indicators of solid glue
Solid glue can be used to bond various papers and paper products and is suitable for office workers, accounting personnel, secretaries, teachers, students, and related personnel.
Free formaldehyde content: ≤0.1%
Appearance: Smooth surface without obvious deformation
Compatibility: easy to coat, no obvious dregs
Glue stick repositionability: can revolve far
Adhesiveness: the paper is broken, the adhesive should not come off
Non-volatile content: PVA type ≥23%, PVP type ≥35%
Container tightness (50±3)℃/20h: weight loss ≤1.0%
Mildew resistance (30±2)℃/relative humidity 75%: no mildew after 72h test