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
 
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PRODUCT BENEFITS

  • Good adhesion on polypropylene
  • High green strength  
  • Long open time  
  • Very good ageing and heat resistant
 

Areas of Application

SikaMelt®-174 has excellent 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. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.  

Product Details

Typical Product Data
Chemical base

Polyolefin

Color (CQP001-1)

Beige

Cure mechanism

Physical hardening

Density (uncured)

0.9 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
Technical Information

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

Application Information

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).

en_PNG_01-diagram-sikamelt-174

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 guarantee 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.