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Pksc 4300: Solvent-Free Lamination Exam Questions And Correct Detailed Answers With Complete Solutions | Graded A+

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PKSC 4300: Solvent-Free lamination Exam

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PKSC 4300: Solvent-Free lamination Exam


1. What is the rationale for solvent-free lamination?: it eliminates the solvent cost, drying cost,


and oxidizer cost

2. Describe the chemistry of solvent-free adhesives: - made of short chained polyurethane to


lower the viscosity to ensure proper coating of the substrates

- there is a higher concentration of isocyanates and polyols so the reaction is faster compared to solvent adhesives


3. What in the lamination process is done to lower the viscosity of the solvent


free adhesive?: - the rollers in the coating station are heated


- more rollers are added as the adhesive is a shear thinning material

4. What is pot life?: how long the adhesive is usable in the machine


5. What is the typical pot life of a solvent-free adhesive?: 10-30 minutes


- adhesives are mixed on the fly with an MMD device; Meter-Mix-Dispense

6. What is a downfall to heating the rollers?: - the heat may reduce the viscosity of the adhesive


but at the same time the rate of reaction is increased

- the molecular weight and viscosity builds faster

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