SikaMelt®-172

High performance polyolefin hot melt adhesive for assembly and lamination

SikaMelt®-172 is a multipurpose, thermoplastic hot melt adhesive for assembly and lamination applications. It combines very good heat resistance and initial strength with a broad adhesion range on non-polar and some polar substrates. The rapid setting characteristic of SikaMelt®-172 may prove beneficial for applications that involve short cycle times.  

  • Good adhesion on polypropylene without surface treatment
  • High initial strengh
  • Very good ageing and heat resistance
  • Suitable for assembly and lamination
 
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PRODUCT BENEFITS

  • Good adhesion on polypropylene without surface treatment
  • High initial strengh
  • Very good ageing and heat resistance
  • Suitable for assembly and lamination
 

Areas of Application

SikaMelt®-172 has very good adhesion properties on non-polar olefinic substrates like polypropylene. Therefore it is suitable for permanent bonding on non-polar polymers, wood, textiles, non-woven materials and foams.
SikaMelt®-172 is designed for the lamination and assembly of Automotive interior trim parts made of Polypropylene. Furthermore, SikaMelt®-172 may be considered for the lamination of certain polar substrates such as PC/ABS or ABS, subject to proper validation by the customer for their application.
This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.  

Packaging

     

Compartment box

10 kg

Pail15 kg
Pail (Carboard, siliconized)18 kg
Bag25 kg
Drum145 kg

Product Details

Typical Product Data
Chemical base

Polyolefin

Color (CQP001-1)

Honey

Cure mechanism

Physical hardening

Density (uncured)

0.90 kg/l

Viscosity (by Brookfield)

at 180 °C

32 500 mPa∙s

Softening temperature (CQP538-5)

140 °C

Application temperature

 

short term max 1 h

160 – 190 °C

200 °C A

Open time (CQP559-1)

Short

Shelf life

24 months

CQP = Corporate Quality Procedure

A) 23 °C / 50 % r. h.

Technical Information

CURE MECHANISM

SikaMelt®-172 is a physically hardening adhesive.

CHEMICAL RESISTANCE

SikaMelt®-172 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®-172 can be applied as film, dot, bead or spray application. When dispensing SikaMelt®-172 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-172

Diagram 1: Viscosity as function of temperature

 

During breaks SikaMelt®-172 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 mandatory 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®-172 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 Sika® Cleaner-350H or a suitable industrial hand cleaner and water.
Do not use solvents on skin.

STORAGE CONDITIONS

SikaMelt®-172 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.