Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball

Abstract A 50:50 blend of NR and SBR 1011 is heterogeneous. When tackified with a resin which is compatible with the NR phase, but not the SBR phase, the resin appears to partition unequally between the NR and the SBR. The resulting heterogeneous pressure-sensitive adhesives exhibit very broad storage modulus transition zones. The increased breadth occurs predominantly at the lower frequency portion of the transition. This is quite different from the NR/SBR blends tackified with a resin which is compatible with both NR and SBR. The NR/SBR blend with compatible resins exhibits a single sharp transition which is similar in character to either pure NR or pure SBR adhesives prepared with completely compatible resins. The differences due to heterogeneity are clearly manifested in the mechanical properties of the blend and are reflected by the rolling ball tack and shear strength to steel properties. Rolling ball tack data are consistent with the hypothesis that the NR phase is more highly tackified than is the SBR phase. Shear adhesion to steel data further support this conclusion.

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Adhesives for paper and board, packaging and disposable sanitary products. Tack measurement for pressure sensitive adhesives. Determination of rolling ball tack

10.3403/01559868u ◽

2015 ◽

Keyword(s):

Rolling Ball ◽

Pressure Sensitive Adhesives ◽

Pressure Sensitive ◽

Sanitary Products

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Passivation of pressure sensitive adhesive stickies by addition of acrylic fibers to OCC pulp before papermaking

TAPPI Journal ◽

10.32964/tj15.10.631 ◽

2016 ◽

Vol 15 (10) ◽

pp. 631-639

Author(s):

MOHAMMAD HADI ARYAIE MONFARED ◽

HOSSEIN RESALATI ◽

ALI GHASEMIAN ◽

MARTIN A. HUBBE

Keyword(s):

Adverse Effects ◽

Control Sample ◽

Pressure Sensitive Adhesive ◽

Acrylic Fiber ◽

Burst Strength ◽

Pressure Sensitive Adhesives ◽

Pressure Sensitive ◽

Tear Index ◽

Breaking Length ◽

Acrylic Fibers

This study investigated the addition of acrylic fiber to old corrugated container (OCC) pulp as a possible means of overcoming adverse effects of water-based pressure sensitive adhesives during manufacture of paper or paperboard. Such adhesives can constitute a main source of stickies, which hurt the efficiency of the papermaking process and make tacky spots in the product. The highest amount of acrylic fiber added to recycled pulps generally resulted in a 77% reduction in accepted pulp microstickies. The addition of acrylic fibers also increased pulp freeness, tear index, burst strength, and breaking length, though there was a reduction in screen yield. Hence, in addition to controlling the adverse effects of stickies, the addition of acrylic fibers resulted in the improvement of the mechanical properties of paper compared with a control sample.

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