Hot-melt Adhesive for Textile Lamination WD8570
WD8570 is a single component reactive polyurethane hot melt adhesive that has excellent adhesion, temperature resistance, water resistance, oil resistance, and aging resistance due to its ability to cure with air and moisture on the surface of the bonded material.
The product complies with the limit of volatile organic compounds in adhesives (GB33372-2020).
WD8570 has a long opening time and high initial strength, and is widely used in underwear, home textiles, and clothing. It has excellent bonding properties to materials such as cloth, sponge, and PU film.
1.Single component, easy to manage, suitable for mechanized operation, high efficiency.
2.Solid content of 100%, no pollution, environmentally friendly.
3.Wide applicability, with good adhesion to sponges, wood, non-woven fabrics, etc.
4.High initial adhesion and fast positioning speed.
5.After complete curing, it has strong resistance to high and low temperatures and final strength.
Performance indicators
|
Project |
Standard |
Test method |
|
|
Material |
Polyurethane |
||
|
Appearance |
Melt temperature |
Black liquid |
visualization |
|
Room temperature |
Black solid |
visualization |
|
|
Viscosity/mPa · S |
120℃ |
3000~5000 |
HG/T 3660-1999 |
|
140℃ |
1000~3000 |
HG/T 3660-1999 |
|
|
Stability/mPa · S (120 ℃&12h) |
120℃ |
＜10000 |
GB/T16998-1997 |
|
140℃ |
＜8000 |
GB/T16998-1998 |
|
|
Specific gravity/g/cm3 |
1.10~1.20 |
GB/T 13354 |
|
Operating conditions
|
Project |
Standard |
|
Opening time/s (23 ± 2 ℃ * 55 ± 5% RH) |
30~120 |
|
Positioning time/min (23 ± 2 ℃ * 55 ± 5% RH) |
5~20 |
|
Melt glue temperature/℃ |
120~160 |
|
Glue application temperature/℃ |
130~150 |
|
Coating method |
Spray coating |
|
Coating amount g/m2 |
80~120 |
Melt viscosity - temperature curve
Characteristics after curing
|
Project |
Standard Range |
Inspection standards |
|
Hardness/Shore A |
30-60 |
GB/T531.1-2008 |
|
180 ° initial peel strength/N/100mm (25 ℃ * 60% humidity, sponge&PP non-woven fabric for 30 minutes) |
≥ 20 or material breakage |
GB/T7124-2008 |
|
180 ° peel strength/N/100mm (25 ℃ * 60% humidity, sponge&PP non-woven fabric cured for 3 days) |
≥ 30 or material breakage |
GB/T7124-2008 |
Preprocessing
1.The bonded surface has oil stains, dust, and affects the bonding strength, requiring clean, dry, oil-free, or dust-free treatment.
2.When the surface temperature of the adhered material is below 10 ℃ during use, due to the low temperature, the opening time is shortened, which affects the operation time and leads to poor adhesion. If it is necessary to bond the material, it needs to be heated.
Coating method
1.The melt adhesive process uses a sealed melt adhesive tank and a 20L/200L melt adhesive system. If any abnormal viscosity, particles, foaming, or other phenomena are found during the melt adhesive process, please contact Kangda technical sales personnel immediately.
2.The coating method includes rolling, scraping, and spraying.
Curing time
WD8570 aims to achieve complete curing, and the bonded product should be stored at an appropriate temperature or humidity (temperature 25 ℃, humidity 50% or above, and strength of 80% or above after curing for 7 days). The curing process depends on the following factors:
1.Humidity and temperature in the storage and usage environment.
2.Humidity on the surface of the bonded substrate.
3.Breathability of the bonded substrate.
4.Adhesive area/adhesive layer thickness in application.
Cleaning method
1.Melt glue system: Special cleaning agent WD8600 is used for rinsing.
2.Glue application system: The scraper and roller are rinsed with specialized cleaning agent WD8602.
3.For already cured adhesives, please consult with Kangda technicians.
Matters needing attention:
1.Local exhaust devices should be installed in the operating area to ensure ventilation.
2.Hot melt adhesive must be heated when used, and personal protective equipment such as work clothes, cotton gloves, protective masks, goggles, etc. should be worn.
3.Due to the moisture curing reaction of the product, the packaging sealing should be carefully checked before use to ensure complete sealing and product integrity.
4.Please read the product safety manual carefully before use.
Environmental temperature: Store in a cool and dry room at 5-35 ℃.
Storage period in the original sealed container: 9 months.
Aluminum foil bag/drum composite sealed packaging: 20kg/drum or 200kg/drum.
