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The adhesives and sealants industry is a technically mature market. Companies are continuously investing in new technologies to differentiate their product lines. As formulations and product line offerings become generic, an area that has become increasingly interesting is adhesives and sealants delivery systems.
Currently, some pump systems are used to dispense fast-curing systems. These pumps are relatively expensive and require continuous maintenance. If these pump systems break down, then the project or process is not delivering product. These pumps, or hand mixing of plural-component systems, may result in a high percentage of material waste.
This article reviews the technical design and benefits of the use of a unique two-component packaging system designed to deliver product with a standard caulking gun. This package will provide the adhesives and sealants industry with a lower cost, lower waste, safe two-component delivery system.
Product DescriptionThe Capsule in a Cartridge (CIC) is a laminate or foil capsule within a single-component cartridge (see Figure 1).
DesignCIC is a two-compartment - or component - laminate film capsule in an injection-molded cartridge (see Figure 3). The capsule contains the two-product chemistry, and controls the ratio of the A & B components.
Future developments for the CIC will be to provide for more new packaging options. Future packaging developments include expanding the range of mix ratios of the resin/polymer:catalyst systems to include 1:1 and 2:1. There is an ongoing development project to define the compatible laminate films for a range of adhesive and sealant systems. The critical technical challenge is to approve films that are stable with adhesive and sealant technologies and can be heat sealed. Based on standard-sized applicators, the CIC is being designed for a range of cartridge fill volumes.
Dispensing the CICThe CIC capsules uniformly compress (which controls the ratio of the two components), and material is combined/dispensed via a mixing nozzle (see Figure 8). The CIC is a two-compartment - or component - laminate film capsule in an injection-molded cartridge. The capsule contains the two-component product chemistry and controls the ratio of the A & B components. The procedure to use the CIC includes: removing the cap, exposing the red seal clip, cutting the film to expose both components, screwing on the static mixer nozzle, installing into the standard applicator and dispensing the material (see Figure 9).
ApplicationsThe CIC packaging technology has a significant current use for the dispensing of a high-performance construction system. The CIC has the potential to dispense a variety of two-component adhesives and sealants with a single-component delivery system. The current use for the CIC is the packaging and application of chemical anchors (see Figure 10). The CIC system is used for anchoring threaded rod and reinforcing bar and is applied with a standard sealant applicator gun. The mixer nozzle ensures complete mixing ratio of the product. This bonded anchor system combines high strength and a stress-free fixing with excellent weathering and chemical resistance properties.
The CIC system is a potential package for a range of two-component adhesive and sealant technologies, including polyesters, epoxies, silicones, modified silicones, methacrylates, and urethanes. Potential construction applications include chemical anchors, crack repair, joint sealing and glazing. Potential industrial applications include sealing, bonding, insulating, potting and glazing. Potential automotive applications would include sealing, bonding, glazing, windshield replacement and general multi-substrate repairs.
SummaryThe Capsule in a Cartridge (CIC) is a laminate or foil capsule within a single-component cartridge. The capsules uniformly compress, which controls the ratio of the two components, and material is combined/dispensed via a mixing nozzle. The capsule controls the ratio of the two components. The CIC capsule compresses as the components are extruded.
This two-component packaging system can deliver product with a one-component applicator, and may provide the adhesives and sealants industry with a lower cost, lower waste, safe two-component delivery system.
This article is based on a paper presented at the Fall 2006 Adhesive and Sealant Council Convention. For more information, visit www.ascouncil.org.
For more information, visit www.exchem.com.