DOWNLOAD AUDIO FILE In standard proximity coating with slot die equipment requires that a gap is maintained between the slot die lip face and the substrate.  In proximity coating, the substrate is supported by a precision backing roll and the narrow gap is set by a feeler gauge.  To [...]

Coating Tech Slot Dies

Tensioned Web Over Slot Die (TWOSD) Coating – Technical Paper

DOWNLOAD AUDIO FILE Whether coating batteries or adhesive tapes, there are reasons why coating full width is not always optimal.  When an operation lends itself to coating wet and dry lanes down web across a substrate, what is required to understand what is involved? Lane coating is the process [...]

Lane Coating with Slot Die Equipment

DOWNLOAD AUDIO FILE INTRODUCTION The slot die coating positioner.  That’s not even a real word!  If you type in the word positioner, the word processing program complains that you didn’t spell positioned correctly.  Well, the software developers didn’t work in the coating and converting industry.  For those of us [...]

The Importance of the Positioner in Slot Die Coating

DOWNLOAD AUDIO FILE INTRODUCTION Economies of scale occur when a coated product is manufactured wide, fast and in one pass. Substrates can be manufactured wide and multilayer coating can provided added functionality, but how do you make a coated product faster. The first hurdle is curing (typically the bottleneck [...]

Curtain Coating Technology

Download Audio File INTRODUCTION Panel coating is a unique application of fluid coating technology that provides capability and functionality to a discrete substrate. But what is important to understand and what tradeoffs exist? Unlike continuous coating application against a moving substrate, we are trying to develop steady state control [...]

Rigid Panel Coating with Slot Die Equipment

Download Audio File INTRODUCTION When it comes to fluid coating onto substrates, the equipment required falls into three areas- Extrusion coating Hot melt coating Liquid coating What makes these three coating methods the same and what makes them different? Extrusion coating is typically non-tacky molten polymers being cast onto [...]

Advances in slot Die Coating Technology for Hot Melt Adhesives

Download Audio File When companies are going through the process of justifying a capital expenditure, people need to understand the full cost of ownership (COO). This is fundamentally a return on investment (ROI) question with a life cycle characteristic. Purchase cost combined with operation, utilization and performance can [...]

ROI of Fluid Coating Technology

Download Audio File Wouldn't life be great if complex things could be reduced to simple functions? In the world of coating, if you look deep enough, you can find some of these useful nuggets. In self-metered coating, the liquid flow can be studied as a collection of bulk flow [...]

Balancing Slot Die Design

Download Audio File Liquids can be described as mayonnaise or beer. The Newtonian fluids are beer - they are self-leveling and if you turn a glass of beer upside down, the beer spills out. The non-Newtonian fluids are mayonnaise - without shear they will not move. Turn the mayonnaise [...]

Dispersions in Liquid Coating

Download Audio File It's important to pay attention to critical variables in coating. When it comes to slot die setup and operation, the variables can be separated into linear variables and cubic variables. As you can imagine, linear variables affect the coating performance some, but the cubic variables have [...]

The Critical Variable – Slot Die Lip Gap

Download Audio File All modern products and equipment are getting smarter. There are internal computers tracking automotive mechanics as we drive, there are feedback loops in what we search online and there is the ubiquitous "internet of things." Construction materials are no exception. Glass for residential and [...]

Smart Glass Coating Technology

Download Audio File Finite Element Analysis is commonly utilized in understanding, designing and manufacturing pre-metered coating equipment. But the use of FEA is not limited to understanding fluid flow. It can also be utilized to determine the structural strength of the equipment and the temperature effect of a heated [...]

Computational Methods Beyond Fluid Flow Analysis

Download Audio File In the world of coating technology, most of the time and energy is spent on coating a moving web to create roll stock of fluid-coated and cured materials. Spending time on this area of the converting market is well placed, but how about those companies interested [...]

Discrete Coating Techniques and Equipment

Download Audio File As the world of liquid coating has advanced, so has the design and manufacturing of the equipment. In the world of pre-metered coating, slot die technology has progressed rapidly since it's early years because of computer simulation. The ability to take the rheological fluid characteristics and [...]

Pre-Metered Fluid Flow Analysis with Computational Methods

Download Audio File When coating fluids thinner and thinner, you eventually run into some issues with equipment capability. The coating head can't get much closer to the backing roll without interference or damage to the equipment. So what can you do if the coating still is fluttering or the [...]

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Coating Tech Slot Dies

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