SikaMelt®-174
Polyolefin hot melt with high green strength and long open time
SikaMelt®-174 is a versatile, thermoplastic hot melt adhesive based on polyolefin. With it´s high green strength and medium open time SikaMelt®-174 offers an excellent suitability for sandwich panel applications.
- Good adhesion on polypropylene
- High green strength
- Long open time
- Very good ageing and heat resistant
PRODUCT BENEFITS
- Good adhesion on polypropylene
- High green strength
- Long open time
- Very good ageing and heat resistant
Areas of Application
SikaMelt®-174 has very good adhesion properties on polyolefins. It is also suitable to bond on wood, textiles, non-woven materials and (hard-) foams. SikaMelt®-174 was developed for sandwich panel applications were a longer open time and a high green strength are required.This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.
Product Details
| Chemical base | Polyolefin | |
| Color (CQP001-1) | Beige | |
| Cure mechanism | Physical hardening | |
| Density (uncured) | 0.91 kg/l | |
| Viscosity (by Brookfield) | at 180 °C | 5 500 mPa·s |
| Softening temperature (CQP538-5) | 154 °C | |
| Application temperature |
short term max. 1 h | 170 – 190 °C 200 °C A |
| Open time (CQP559-1) | Medium | |
| Green strength (CQP557-1) | 2.5 MPa | |
| Shelf life | 24 months |
| CQP = Corporate Quality Procedure | A) only valid for nozzle |
CURE MECHANISM
SikaMelt®-174 is a physically hardening adhesive.
CHEMICAL RESISTANCE
SikaMelt®-174 is resistant to aqueous surfactant, weak alkaline/ acids solutions and temporarily resistant to fuels, solvents and mineral oils.
The chemical resistance is influenced by several factors such as chemical composition, concentration, period of exposure and temperature. Therefore a project related testing in case of chemical or thermal exposure is required.
Application
Surface preparation
Surfaces must be clean, dry and free from grease, oil and dust.
Application
With adequate processing equipment SikaMelt®-174 can be applied as film, dot, bead or spray application. When dispensing SikaMelt®-174 from drums, for applications by slot die or spraying device, first transfer the material to an intermediate tank avoiding air entrapments.
For automated applications a suitable filter system is required.
To meet the required application properties the adhesive viscosity can be adjusted by adapting the application temperature (see diagram 1).
Diagram 1: Viscosity of SikaMelt®-174 as function of temperature
During breaks SikaMelt®-174 is to be processed as follows:
For breaks ≥ 1 h the heating needs to be lowered to 80 °C and for breaks ≥ 4 h the heating needs to be switched off.
To ensure a constant quality during the whole production process it is recommended to protect the adhesive in the melting tank with nitrogen or carbon dioxide (to avoid possible reaction of the product with oxygen).
For advice on selecting and setting up suitable processing equipment contact the System Engineering Department of Sika Industry.
Removal
Equipment and application tools can be cleaned with SikaMelt®-005 (see also Cleaning Instructions).
SikaMelt®-174 may be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Hands and exposed skin have to be washed immediately using hand wipes such as Sika® Cleaner-350H or a suitable industrial hand cleaner and water.
Do not use solvents on skin.
STORAGE CONDITIONS
SikaMelt®-174 has to be stored at temperature below 40 °C in a dry place.
For transportation purposes, the storage temperature can be exceeded for a period of max. 4 weeks up to 60 °C.