Short stock becomes full-length panels
A panel line throws off offcuts and short limbs all day, and most of that ends up burned or sold cheap. Glue for wood joining is built to change that math. A modified PVAc emulsion is paired with a hydrophilic polyisocyanate hardener at 100:15 by weight, so finger joints and edge joints come back close to solid-timber strength and reach arbitrary board length. A Shandong cabinet-door plant recovered roughly 20 percent of stock it had discarded.
The numbers behind the bond
The base carries 50 percent +/-2 percent solids and runs 8,000-15,000 mPa.s at 25 C on a pH of 5.5-6.5, while the hardener holds about 15 percent active NCO. Shear on North American maple to ASTM D-905 lands at 16-19 MPa with wood-fibre failure above 95 percent, so the seam outlasts the board. The cured line is refractive-index matched to oak and maple, so it disappears on show faces. To EN 204 the system reaches Class D4 and keeps more than 85 percent strength after boil-dry-boil cycling; the formula is formaldehyde-free and clears CARB Phase 2 and JAS.
Press-floor timing
At 25 C you get 30-45 minutes of working time to lay up a stack. Above 20 C, 45-60 minutes under clamp releases the board, with final strength at 24 hours. Spread rate, temperature and press pressure all move that window, so the technical team tunes them to your species and moisture content before any volume commitment.
Made in-house, tested per batch
Winsir Decoration Materials Co., Ltd has run adhesive production since 1998 and holds ISO 9001 and ISO 14001. Every lot passes wood-failure and water-resistance checks, and OEM or ODM work is supported with on-site application help from factory engineers.
Where it earns its keep
Export furniture is the natural fit. The line survives outdoor-grade water cycling and clears the CARB and JAS screens Japanese and European buyers audit, so the same drums feed door blanks, tabletops, panel furniture and laminates without a separate low-emission grade for export. The transparent cure removes a step on visible faces: no touch-up of a dark line before staining. Working time is matched to your species in trial runs before ordering.
Product Specifications
|
Parameter |
Specification |
|
Composition |
Two-part modified PVAc + hydrophilic polyisocyanate hardener |
|
Mix ratio / base solids |
100:15 by weight; base 50% +/-2% solids, pH 5.5-6.5 |
|
Viscosity (base, 25 C) |
8,000-15,000 mPa.s |
|
Bond strength (ASTM D-905) |
16-19 MPa, wood-fibre failure >95% |
|
Water class / open time |
EN 204 Class D4; 30-45 min at 25 C |
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