Dextrins are a group of low-molecular-weight carbohydrates produced by the hydrolysis of starch. Dextrin Adhesives can be classified as a liquid adhesive prepared by cooking to 200°F in water, forming a solution which can be modified for tack, open time and various other properties. Two main types of dextrin adhesives are white dextrins, and canary or yellow dextrins.
Dextrin Adhesives are used as packaging adhesives for board lining, laminating and some bottle labelling applications. Dextrin glue is a water-based adhesive and is easily modified in a variety of ways, including color tint, tackiness and open time.
All dextrin glues possess clean machining capability and excellent bonding properties to paper, paperboard and other cellulosic materials.
Physical Properties of Dextrin Adhesives
- Medium Setting Time
- High Wet Tack
- Appearance – Light straw to dark amber
- Wide Range of Solids
- Clean Machining
- Non Blistering
- Excellent Bonding Properties to paper and paperboard
The Major Advantages of Dextrin Adhesives
- Good availability
- Good adhesion to cellulosic materials and many other porous substrates
- Insoluble in oils and fats
- Non-toxic and biodegradable