What Is Dextrin Adhesive Glue for Paper
Dextrin adhesive for paper is a water-soluble, carbohydrate-based glue produced by controlled hydrolysis of starch. It provides clean bonding, fast tack, and excellent film clarity, making it widely used in paper converting, labeling, envelopes, packaging, and carton sealing.
Definition & Meaning
Dextrin glue is a natural, starch-derived adhesive designed specifically for porous substrates like paper. Its rheology, viscosity stability, and biodegradability make it ideal for eco-friendly adhesive applications.
Description & Overview
Dextrin paper adhesives offer:
-
Moderate viscosity
-
High wet tack
-
Quick drying
-
Good machinability
-
Compatibility with fillers, plasticizers, preservatives, and tackifiers
They are commonly applied by brush, roller, spray, wheel, or automated paper-bonding systems.
Preparation & How to Make Dextrin Glue for Paper
Dextrin adhesive is prepared by dispersing dextrin powder in hot water, adding plasticizers and preservatives, then homogenizing until a smooth, stable adhesive is formed.
Basic Preparation Steps
-
Heat water to 60–75°C
-
Slowly add dextrin powder
-
Mix until fully dispersed
-
Add softeners (glycerin, sorbitol), preservatives, and optional tackifiers
-
Adjust viscosity with water or thickener
Formulation of Dextrin Glue for Paper
Typical components include:
-
Yellow or white dextrin
-
Water
-
Plasticizers (glycerin, sorbitol)
-
Tackifiers (rosin ester, dextrose syrup)
-
Preservatives
-
pH regulators
Manufacturing Process
-
Hydration of dextrin
-
Heat-assisted dissolution
-
Mixing with additives
-
Filtration (optional)
-
Filling and packaging
Production Process
Dextrin is dissolved, modified with additives, viscosity-adjusted, stabilized, and packaged. The product must remain microbial-stable and free of undispersed particles.
Applications & Uses
Dextrin glue for paper is used in:
-
Envelope sealing
-
Paper lamination
-
Tube winding
-
Labeling
-
Paperboard carton and packaging
-
Craft adhesives
-
School glues
Properties
-
Biodegradable
-
Odorless
-
Smooth film formation
-
Adjustable viscosity
-
Excellent paper wetting
-
Quick adhesion
-
Cost-effective
Composition & Ingredients
-
Dextrin (primary adhesive polymer)
-
Water (solvent)
-
Softening agents
-
Tackifiers
-
Preservatives
-
Small quantity of buffer salts
MSDS (General Notes)
-
Non-toxic
-
Low flammability
-
Avoid microbial contamination
-
Store in sealed containers away from heat
Specification (Typical)
-
Appearance: smooth, creamy paste
-
pH: 5–7
-
Solids: 25–55%
-
Viscosity: adjustable (500–20,000 cps)
-
Color: white/yellow (depending on dextrin type)
Summary
Dextrin adhesive glue for paper is a natural, economical, water-based adhesive ideal for labeling, paper packaging, and carton assembly. It offers strong tack, fast drying, and excellent machinability while remaining eco-friendly and safe for broad industrial use.
