uncover the legendary PUR edge banding technology
uncover the legendary PUR edge banding technology
Release date ：2022-04-09 Browse times：3584
In the production process of panel furniture, edge banding is one of the most important processes, as the quality of edge banding directly affects the final usage effect of panel furniture. Throughout the entire edge banding process, the bonding condition between the adhesive and the edge band has a significant impact on the overall edge banding effect of the furniture.
Currently, the mainstream edge banding
What is PUR?
PUR is an abbreviation for Polyurethane Reactive, a relatively common reactive polyurethane hot melt adhesive. It combines the characteristics of both ordinary hot melt adhesives and reactive adhesives:
PUR is an environmentally friendly adhesive with adjustable rigidity and toughness (elasticity), excellent bonding strength, heat resistance, moisture resistance, chemical corrosion resistance, and aging resistance. It is free from toxic and harmful volatile chemical substances such as formaldehyde and benzene. Due to its superior performance, it is mainly used in the automotive and electronics industries.
What is PUR?
实际应用场景：
III. Processing Principle of PUR
The processing principle of PUR involves melting it through heating and then applying adhesive. After application, rapid cooling provides initial strength to achieve preliminary bonding. Later, it undergoes cross-linking and curing through a reaction with moisture, forming a three-dimensional cross-linked network to obtain good final strength. This process is an irreversible chemical bonding; once curing is complete, reheating will not cause it to melt.
PUR edge banding generally undergoes seven main processes: 'separation - pre-milling - heating - gluing - edge banding - trimming - cleaning'. However, with equipment upgrades and automation, trimming technology has become more precise. Today's fully automatic PUR edge banding machines can achieve a fully automated edge banding process including 'separation - pre-milling - gluing - pressing and scraping - head alignment - rough trimming and fine trimming - edge scraping - thread cutting - cleaning agent application - polishing'.
IV. Process Advantages of PUR Edge Banding
#01 - Excellent Bond Strength
Experiments involving strength testing through wood failure effects show that the greater the bond strength, the more pronounced the wood failure. Comparisons reveal that the wood failure effect of PUR is significantly more noticeable than that of traditional adhesives used in edge banding.
A good wood failure effect effectively reduces the impact of external forces on furniture during transportation, handling, and later use, thereby extending the service life of the furniture.
#02-Exceptional Water Resistance
PUR can maintain long-term quality stability in high-temperature environments and boasts superior waterproof performance. Relevant tests show it can withstand submersion for over 8 hours, with some cases even enduring immersion for tens of hours without any abnormalities. In contrast, traditional edge banding often cannot withstand submersion in clear water for more than 2 hours; once this time is exceeded, it tends to swell and crack.
This exceptional water resistance ensures proper maintenance of normal furniture. PUR edge banding technology effectively prevents issues arising from wiping or when children spill water and leave residual moisture unattended.
#03- Excellent sealing performance: The glue has excellent sealing performance and can prevent water mist and water vapor from entering the board through the glue joints. Especially for humid southern and coastal areas or Spaces such as balcony cabinets, kitchen cabinets, and bathroom cabinets, the PUR edge banding technology has effectively solved this series of problems.
To sum up, traditional hot melt adhesive edge banding still holds an absolute position in the market. With the continuous improvement of edge banding technology, equipment precision, adhesives and edge banding materials, traditional hot melt adhesive edge banding will be infinitely close to laser edge banding. Moreover, at present, high-quality PUR edge banding can almost rival laser edge banding.
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