Let’s Make Tape(Coating Technology)

Let’s Make Tape(Coating Technology)

Pressure Sensitive Adhesive Tapes for Sales and Marketing Professionals

Tape University Basics May 12, 2009

Tape Making ProcessTape Making Process

Materials

QC

Coat

Convert/Package Inspect

Generic Coating LineGeneric Coating Line

Substrate/Liner

Liquid/100% Solids

Cooling Rolls/Ove

n

Master Roll

Web Surface Treatment

Thickness Gauge

Solvent Treatment

Tension Control

Edge Guide

Laminator

Additional Components

Inspection May Occur at Various Process Points

Increasing Value

Materials

Rolls

Common CoatersCommon Coaters

Calender Extrusion Coater,

Slot Die

Calender Extrusion Coater,

Slot Die

Knife Over Roll Gravure Reverse Roll Mayer Rod Slot Die

100 Percent Solid AdhesivesLiquid Adhesives

Requires Drying Oven

Coater selection is determined by type of adhesive, thickness, and thickness tolerance which impact cost.

CalenderCalender

Characteristics

Speed: 200m/min maxThickness: 100-2,000 micronsViscosity: 50-50,000 Pa.s Examples: Duct Tape, Pipewrap Tape, Building and Construction Tapes

Liquid Adhesive CoaterLiquid Adhesive Coater

Commonly used to coat solution and emulsion based adhesives onto a variety of webs.

Characteristics of CoaterCharacteristics of Coater

Coating Head Viscosity, Pa.s

Wet Thickness, microns

Max Speed, m/min

Mayer Rod 0.02-0.10 5-100 200

Gravure 0.01-5 2-50 700

Knife Over Roll 0.10-100 25-750 150

Reverse Roll 0.05-1200 12-1200 400

Coating head selection based upon adhesive thickness and coating line capabilities

Hot Melt CoaterHot Melt CoaterSpeed: 700 m/min maxViscosity: 50-1,000 Pa.sThickness: 15-750 micronsExamples: Carton Sealing Tape, HVAC Tapes, Mailing Envelope Tapes

SummarySummary

Choice of coating method is a designer’s prerequisite for meeting cost, functionality, and uniformity.

There is both a science and an art to coating which refers to esoteric properties of fluid which are hard to model or predict.

Experience and specific knowledge will determine whether corrections are made to the machine or to the fluid and their limitations.

Choice of coating method is a designer’s prerequisite for meeting cost, functionality, and uniformity.

There is both a science and an art to coating which refers to esoteric properties of fluid which are hard to model or predict.

Experience and specific knowledge will determine whether corrections are made to the machine or to the fluid and their limitations.