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Coating Matters

4 Steps to Resolving Coating Defects

Every coating process engineer and equipment operator wants to know where to start when a coating problem surfaces with their product, so let’s start with the surface of the problem.

Coating Matters | Advances in Slot Die Technology for Hot Melt Adhesives, Part 2

In this second and last part of the series, I will cover equipment design and operation.

Coating Matters | Advances in Slot Die Technology for Hot Melt Adhesives, Part 1

What differentiates extrusion, hot melt, and liquid coatings?

Coating Matters | The 6 C's of Roll-to-Roll Coating Systems

Develop a balanced approach to precision coating by understanding these six areas of concentration.

Coating Matters | Balancing Slot Die Design

How slot die geometry can improve flow control and reduce coating defects.

Coating Matters | Dispersions in Liquid Coating

Unlike non-functional particles that typically are filtered out, functional particles need to be included in the coated product, so special care must be taken to make sure the process is successful.

Coating Matters | The Critical Variable—Slot Die Lip Gap

The key to uniform flow is distribution and stable pressure, velocity, and volumetric flow at exit.

Coating Matters | Smart Glass Coating Technology

Smart glass is amazing, and so is the complexity of the coating technique.

Coating Matters | Computational Methods Beyond Fluid Flow Analysis

If coating equipment has been tested in the computational world, the design will be more robust and the equipment will be more capable.

Coating Matters | Pre-Metered Fluid Flow Analysis with Computational Methods

By taking a finite section of fluid flow within a slot die, one can understand the flow as it is affected by a number of factors.

Coating Matters | Vacuum Systems Offer More Capability

What does an operator gain by using a vacuum system? Coating expert Mark Miller explains the benefits.

Coating Matters | The Advantage of Using Surfactants

Surface active agents provide a tie layer between the liquid and the substrate, but trial and error will be required.

Coating Matters | Making the Most of Your Pilot Line Coating Experience

Planning a coating trial? Answer these 7 questions to maximize your results.

Coating Matters | Fluid Delivery System Design for Coating Control

Choosing the right pump for the application can make or break your coating application.

Coating Matters | The Effects of Viscoelastic Behavior, Pt. 2

Viscoelasticity is a feature of a given adhesive system that needs to be taken into account when designing a process, equipment, or application technique.

Coating Matters | Clean Coating and Fluid Preparation

When you are concerned about cleanliness of a finished product, the best place to start is at the beginning.

Coating Matters | Considerations for Good Manufacturing Practice

With a basic understanding of GMP, you have a better starting point for your venture into the world of medical and pharmaceutical coatings

Coating Matters | Optical Films Require Multiple Layers

When coating optical films, should the fluid layers be coated and dried or built up via deposition?

Foil Substrates: Handling, Web Control & Substrate Interaction

What makes coating foils different than coating plastic or paper substrates? Handling and web control are definitely different for foils than films or paper, but the fluid substrate interaction is also important.

Coating Matters | Energy Storage Devices

From lithium-ion batteries to capacitors to solar panels, one common feature is they are all produced through a coating method

The Effects of Surface Treatment at the Interface

There are a variety of methods for encouraging fluids to stick to substrates in coating applications- corona, plasma or flame treating the substrate; adding a primer prior to coating; and utilizing a vacuum system at the coating head interface. The addition of surfactants is one method of adjusting the fluid itself that should be considered.

Coating Matters | Film Split Defects

When there are two rolling surfaces moving in the same direction, the fluid needs to decide which surface to follow. But how is this decision made?

Looking Behind the Curtain of Coating

Economies of scale occur when a coated product is manufactured wide, fast and in one pass.  To obtain economies of scale, curtain coating is one method to consider.

Coating Matters | The Effects of Viscoelastic Behavior, Pt. 1

When coating a fluid, consideration of the rubbery behavior needs to be given with the shear rate versus viscosity data

Giving Adhesive Coating Its Due Respect

Adhesives are a coating in the converting world that do not get a lot of respect. However, when you look at the market of adhesive coating, the technology requirements and process expertise can be just as demanding as some higher tech type coatings in the electronics, optical and energy storage worlds. Considerations are similar, with an understanding of the economies playing a larger role.

Coating Matters | Pressure-Sensitive Adhesive Coating

When looking for process, product, and profit improvements for your PSA tapes and labels, consider going back to the drawing board

Coating Matters | Construction Materials for Coating Equipment

Mark Miller helps you identify the right material selection for tooling that will carry fluid to your substrate

Conflicting Flow in Coating

Coating flow forces battling for control.

Coating Matters | Membrane Process Technology

Here are a few theories to guide your decision making for achieving the thin coatings needed for filtration

Porous Substrates

Nonwovens, fabrics, papers and membranes provide unique substrates for fluid coating applications. Depending on the final product needs, the fluid may need to be placed on top of the substrate, penetrate all the way through the substrate or some arrangement of the fluid between these two extremes. So what can you do to control fluid flow once the liquid is placed on the substrate? The keys lie in coating technique and understanding the wetting behavior of the fluid.

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