Troubleshooting Shrinkage in Urethane Adhesives and Encapsulants

In our last blog, the team at Resin Designs walked you through how to troubleshoot voids in urethane adhesives and encapsulants. This week, let’s explore how to properly troubleshoot shrinkage. How Shrinkage Occurs Shrinkage takes place in elastomers when polymers and catalysts react. Under normal processing conditions, shrinkage rates remain at 1-2%. Warping will occur […]

Troubleshooting Voids in Urethane Adhesives and Encapsulants

In our last blog, you gained insight into troubleshooting polyurethane air entrapment. This week let’s look at troubleshooting voids in urethane adhesives. Causes of Voids Before de-molding, there could potentially be huge voids in the part or on the surface. The voids are visible with the naked eye and they occur at thin-walled sections. Pot […]

Troubleshooting Polyurethane Air Entrapment

Urethanes are commonly used to encapsulate electronic circuits because of their moisture resistance and other positive attributes. These benefits are important, however sometimes issues arise that must be remedied immediately to achieve the best results. Bubbles Appearing in Parts On occasion, small bubbles do become visible throughout the parts and may not be localized. Causes […]

Troubleshooting Epoxies

Resin Designs creates and designs custom epoxies for a variety of industries. These products provide superior adhesion to metals, ceramics, rubbers, glass and plastics. Below are several issues face when working with epoxies, as well as some tips on how to fix them. Issue #1: The epoxy mixture has not cured once the cured time […]

Troubleshooting UV Curing Adhesives

UV curing adhesives are extremely convenient as they provide a way to rapidly cure a product in specific applications. There are two cure mechanisms that are extremely different from one another – cationic and free radical. Understanding Cationic UV Systems In regards to cationic UV cure products, such as Vividcure 86011, photo-generated acids catalyze polymerization […]

UV Acrylates- Secondary Cure Mechanisms

Overview In two of our previous articles, “Understanding UV Curing Adhesives” and “Cationic Epoxies- Advantages” we discussed the benefits of single component light curing adhesives. UV/light curing adhesives use energy from visible light or UV radiation to initiate polymerization. However, areas that are not exposed to radiation will not cure. This weakness has led to […]

Urethanes in LED Encapsulation – PT 2

In our previous blog “Urethanes” we discussed the advantages of urethane adhesives and applications when they are advantageous. One particular application that urethanes excel in is LED encapsulation. When high temperature resistance is not necessary, urethanes can be implemented in place of silicones. Urethanes work more efficiently in low temperature applications and are easily utilized […]

Urethanes

Understanding Urethanes Urethanes offer an array of benefits including flexibility, water white clarity, low temperature functionality, and elongation as well as abrasion resistance. Due to these properties, urethanes are at an advantage compared to other adhesives in devices that are undergoing stress due to discrepancies of component composition. Numerous urethanes consist of low glass transition […]

UV Display Adhesives (LOCA)

UV display adhesives are commonly referred to as LOCA, otherwise known as liquid optically-clear adhesives. This specific type of adhesives is primarily used for the electronic industry, including products such as smartphones, touchpads, LCD screens and much more.  Due to its rapid drying process, high transmittance and low shrinkage, LOCA has become an increasingly useful […]

Cationic Epoxies – Advantages

Overview  As discussed in our previous article, cationic and free-radical are the two most popular mechanisms for UV adhesives. Approximately 93% of the UV market is in free radical chemistry  while cationic has about 7%. Although a minority of the market, cationics provide strategic advantages over traditional free-radical acrylate chemistries. These advantages include: Shadow Cure […]

Understanding UV Curing Adhesives

Often referred to as UV Curing, Ultraviolet Curing utilizes high-intensity ultraviolet light to generate a photochemical reaction which instantly polymerizes adhesives, inks and coatings. The main two types of photochemical reactions used are acrylate free radical and cationic epoxy. UV curing differentiates itself from other traditional drying methods due to its increased production speed, reduced […]

The Importance of Epoxy Glass Transition Temperature

Unlike thermoplastic alternatives such as hot melt adhesives, cured thermosetting epoxies will not re-flow or melt when heated. Instead, epoxies will undergo a transition from a hard rigid state to a more pliable, rubbery state. The temperature range during which this transition takes place is known as the glass transition temperature, Tg.

Connector Design Considerations

In part 3 of our blog series, Resin Designs explored the various types of gel seal connectors. This week, we’ll be discussing connector design considerations. Connector Design Considerations At Resin Designs, we help customers create new connectors with low wire insertion forces using silicone gel grommet seals. Along with this, existing connectors can be modified […]

Lead-Free Solders Vs. Silver Filled Epoxy Adhesives

Historically, lead solders have been the conductive bonding materials of choice, mainly due to the reliable performance and availability of the base materials. However, as the electronics industry strives to create more environmentally and worker friendly electronic products, lead-free solders have been developed and ECAs have gained greater acceptance as a solder alternatives.

Form In Place Gasket Materials

The design of gaskets comes in a nearly unlimited number of component arrangements and material combinations from which they inherit their properties. As a result, gaskets can be classified in various ways ranging from the category of the utilized materials to the function and application of the resulting gaskets. Gaskets can also be classified according to […]

B-Staged Epoxy Films

B-stage epoxy films are partially cured versions of a traditional epoxy resin. From a high level, b-stage films provide the same function as traditional heat-curing epoxies. Films are positioned at the bond interface, and heat is used to complete the polymerization reaction and adhere the bond.