Peculiarities of Starch Adhesive Application
Starch is a natural polymer of plant origin. It is most often produced from corn, potatoes, and wheat. Due to its unique properties and specific characteristics, starch has found application in industrial production. Because of its unique formula, it has several uses in industry. One of these is bonding.
Starch based adhesive applications
You can use starch adhesive: for gluing labels, in the production of corrugated board or in wallpaper adhesives.
For product labeling, adhesives based on modified starches can be used in the following conditions:
- The line speed is less than 30 thousand bottles per hour. The label is pasted on dry glass at a temperature up to 40 ˚С.
- When labels are applied with an overlap of more than 8 mm on PET or tin containers.
Starch adhesives for labelling are very popular because they have a number of specific advantages, including the following:
- Relatively low cost;
- Can be used in manual application;
- Simple equipment cleaning;
- Can be diluted with water;
- A wide range of glues.
Testing of starch adhesive on equipment
Before testing it is necessary to:
- Check the adhesives for compatibility by mixing small, equal amounts of the two adhesives. Indicators of adhesive incompatibility are: coagulation, foaming, significant dilution or thickening of the mixture of the tested samples, etc.
- If the adhesives are compatible, a full cleaning of the adhesive system is not required. It is enough to clean the pump, wipe the carriers and pump the remaining glue from the hoses. If the adhesives are not compatible, you should thoroughly wash the adhesive system of the remnants from the previous adhesive.
- Before starting the line, warm the adhesive to the optimum working temperature indicated in the technical description of the tested glue’s TM.
- It is recommended to skip the first few bottles in manual mode and check the uniformity of glue application, adhesive layer thickness, label clamping, quality and fixing time and label displacement or shearing.
Manual starch adhesive application
Adhesives for manual application are selected depending on the type of surfaces to be bonded and which adhesive will provide sufficient adhesion for that application. With the manual labeling method, low viscosity grades are selected. For manual application, it is also possible to use types of adhesives intended for equipment. These adhesives are more viscous, so technicians recommend diluting the adhesive with water just before use.
We recommend that you carefully consider the selection of starch glue for use on both equipment and manual application. Incorrect selection leads to “shedding” of the label during packaging, transportation or at the point of sale. A badly glued or a label that has fallen off creates an untidy product look and damages the company's image.
To select starch adhesive properly, contact the Lux-X technical specialists. Our specialists will come to audit your equipment and test adhesives in the enterprise free of charge. Use the 'Order' button and managers will contact you as soon as possible!