Energy savings plus mechanical reinforcement and rheology control

Styrene-Isoprene-Styrene Hot Melt PSA for Low Temperature Labels by Kraton

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Styrene Block Copolymers, SBC (SBS, SEBS, SEPS, SIS)

Applicable Industrial Sectors

Tapes

Applicable Base Polymer Properties

Styrene block copolymers (SBCs) offer cohesion, strength, and heat resistance for both pressure sensitive adhesives (PSAs) and non-pressure sensitive adhesives. The styrene phase forms a physically crosslinked network in the adhesive at room temperature. Of the SBCs, styrene butadiene styrene (SBS) has the highest shear strength and moderately good peel strength. Styrene isoprene styrene (SIS) has the highest peel strength although it is cohesively weaker than the SBS resins.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Styrene-isoprene-styrene copolymer (Kraton D-1107, Kraton)

xxxx

Tackifier (Wingtack 95, Cray Valley)

Tackifier (Wingtack 10, Cray Valley

xxx

Antioxidant (Irganox 1010, BASF)

Typical Properties

Properties

Melt viscosity @ 177°C, Pas

Probe tack @ -18°C, gm

xxx

Rolling ball tack, cm

xxx

Loop tack, N/m

xxx

180° Peel strength, N/m

xxx

Processing

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Resulting Properties

This adhesive formulation has good melt stability. The color and color retention after aging is better than other comparative adhesives. The adhesive has relatively good bond strength (peel and shear) even after aging. This adhesive formulation also shows:

High tack and peel strength
Good adhesion to low energy surfaces
Excellent adhesion to oriented polypropylene and Kraft paper
Very good cohesion
No transfer after aging

(Source: Kraton)

Tips and Tricks

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