What is Bead Glue? Where is it used? Hot Melt Bead Guide
Bead glue is a hot melt packaging form in which the adhesive is presented as small solid beads or granules. It is melted in the machine tank, applied to the surface while hot, and forms a bond as it cools. EVA, PO or some special hot melt formulations can be found in bead form; Usage areas include packaging, edge banding, paper, bookbinding and general assembly.
Bead glue is a form of hot melt adhesive packaged into small solid particles. The bead form makes it easy to dosing, stocking and dissolving the product in the automatic tank. The word bead alone does not indicate the chemical type; EVA, PO or another hot melt family can be offered in bead form.
What is bead glue?
Beads are fed into the heated chamber on the production line. After melting, it is transferred to the surface with a roller, nozzle or special application head. The second surface is bonded within the appropriate open time and the first bond is formed upon cooling. For this reason, melting behavior, viscosity, open time, color and surface compatibility are as important as the solid product form in bead glue.
How to apply?
- Keep the beads dry, clean and in the manufacturer's packaging.
- Fill the machine chamber without exceeding the recommended capacity of the product.
- Wait for the tank to melt completely and the temperature to stabilize.
- According to the application amount according to the surface, line speed and TDS value. adjust.
- Assemble parts in open time and apply required pressure.
- Keep initial part quality control and product changeover records.
Mixing granules with a different product, leaving the hopper idle at high temperature for long periods of time, or repeatedly heating the molten product can cause color and performance problems. Machine and cleaning procedure should be taken as basis for product replacement.
Where is bead glue used?
- Edge banding: EVA or suitable hot melt beads can be used on PVC, ABS, melamine and wooden bands.
- Packaging: High speed in parcel, box, tray and carton closing lines application.
- Paper and bookbinding: Book, brochure, folder and folding applications.
- Assembly:Processes requiring fast initial adhesion on suitable surfaces.
| Advantage | Needs attention |
|---|---|
| Solid and easily dosed form | Storage protected from moisture and dirt |
| Hot application without solvent | Managing tank and nozzle temperatures according to TDS |
| Fast initial hold | Matching open time to line speed |
| Suitability for automatic feeding | Preventing mixing and contamination during product change |
Storage and equipment control
Bead glue should be stored in a dry, closed environment and away from direct sunlight. It is important that the product does not come into contact with moisture, dust or foreign chemicals after the packaging is opened. Moisture sensitivity may be more critical with PUR reactive beads than with EVA and PO; The product family must be verified through labeling and TDS.
How to choose bead glue?
First choose the chemical family: EVA for general purpose and economical production, PO for clean process and specific surface performance, reactive PUR for high ultimate strength can be considered. Then compare the substrate, tape or cardboard, line speed, application temperature, visible joint, color, open time, cleaning method and service condition.
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What is Bead Glue? Where is it used? Hot Melt Bead Guide hakkında merak edilenler
What type of adhesive is bead glue?
Bead glue is a form of packaging and application; It does not specify the chemical family by itself. EVA, PO or some reactive hot melt products may be available in bead form. Verification must be done through label and TDS.
How to melt bead glue?
In the heated tank of the production machine, the product is melted according to the temperature range in its TDS. Application should be made after tank, hose and nozzle temperatures become stable.
Is bead glue used in edge banding?
Suitable EVA, PO or PUR bead products can be used in edge banding machines. Compliance with belt backing, panel, machine and line speed must be verified on the actual sample.
Technical resources and verification
The content has been prepared in Turkish with the technical experience of Koçak Endüstri, based on the following manufacturer resources.
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