We would like to offer some suggestions which might assist in achieving optimum bonding during the winter months:
- Edgebanding Machines: always refer to recommended settings from your machine supplier. Generally speaking in colder conditions, hotmelt adhesives will perform better when operating at a slightly higher temperature (provided the adhesive is also suitable for that temperature).
- Glue Pot: the actual glue temperature within the glue pot should be checked periodically using an independent temperature probe, to ensure the temperature gauge reading is correct.
- Machine Location: avoid the possibility of cold breezes flowing onto the machine (near open doors etc) as this can have a negative effect on the performance of the adhesive.
- Hotmelt Adhesives: always refer to the Technical Data Sheets and recommendations made by your Adhesive supplier and use a Hotmelt adhesive suitable for your machine. Operating temperatures are generally relative to the machine speed, so please also refer to this information on the TDS for your Adhesive.
- Edgebanding: rolls should ideally be stored in closed cabinets or at least off cold concrete floors. The edgebanding rolls should ideally be warmed prior to application to promote optimum bond. This is generally achieved by hot air, heated fence or heat lamps near the infeed on the machine.
If possible and practical, schedule edgebanding processing for later in the day when temperatures have generally increased.
The information contained herein is offered in good faith and is intended as a general guide only. Please consult your machinery supplier and/or Surteco for specific Technical Support.
| Issue: | Trouble-shooting Suggestions: |
The edging can be easily removed by hand. Adhesive transfers to the board face but not to the edging surface. The grid pattern from the adhesive application roll is visible. |
Room temperature may be too low or there may be a draught in the zone between the application of adhesive and contact pressure roll. Edging material may be too cold. Glue-pot temperature may be too cold. Rate of feed is too slow for type of adhesive. Not enough contact pressure of application / spreader roll. ACTION:
Check ambient temperature, board, edging and glue-pot. Check feed speed is suitable for adhesive being used. If not, opt for higher grade adhesive . |
The edging can be easily pulled off by hand. Adhesive remains on the board. Surface of adhesive is completely smooth (no grid pattern). |
Board and/or edging was too cold during application. Primer may be at fault or incorrect type used. ACTION:
Check temperature of board, edging and air. Board and edging should ideally be around room temperature. |
Edging can be pulled off by hand. Majority of adhesive remains on the edging, lesser amount on the board. |
Board material may be retaining too much residual heat (e.g. after the preceding veneering / lamination press). Adhesive may be running too hot thus lowering viscosity & allowing the adhesive to ‘soak’ into board edge. Adhesive may be incorrect grade for machine/speed.
ACTION: Reduce adhesive temperature in pot (and roller if separate control). Consider higher heat resistant hotmelt adhesive |
No bonding of edging at the front end of the board or the edging has splintered off a few millimetres in the front. |
Adhesive application/spreader roll is protruding too far into the line of board. No adhesive applied at the leading edge of board due to strong springback of the roll at the front edging of board. ACTION: Adjust roller alignment and other associated settings. |