Aug 10, 2012
Solid adhesives benefit industryBack
© Reuse this
He states that the biggest advantage of using preformed adhesives is that solid preforms remain so until they are heated, enabling epoxy to flow consistently onto the desired component, whereas liquid adhesives typically drip and dispense inconsistently onto unwanted areas of a component.
Multi-Seals’ US-manufactured Uni-form and Poly-form adhesive seals were both developed as alternatives to liquid adhesives.
The Uni-form is a one-part epoxy resin that is solid at room temperature. When heated, it melts and cures, forming a consistent seal to protect components from dust, moisture, oil, flux, industrial cleaning solvents, conformal coatings and other contaminants.
Meanwhile, the Poly-form is flexible before curing, which allows the manufacturer to produce larger and thinner adhesive configurations, says Harvill.
“This is because of a predetermined catalyst-to-resin ratio that produces a complete one-component system, resulting in predictable and consistent results, compared with variable mixed and metered liquid epoxy performance,” he explains.
Further, the viscosity of preforms remains consistent from seal to seal and batch to batch, whereas liquid epoxy continues to polymerise as it is dispensed, causing equipment clogs and variations in viscosity and seal quality.
The rapid manual and automated dispensing abilities of solid adhesives far exceed those of manually dispensed liquids, states Harvill.
Multi-Seals’ Uni-form adhesive, in particular, is well suited to a variety of automatic or semiautomatic sealing equipment dispensers such as templates, pick-and-place and bowl-fed gravity track methods.
Further, the solid adhesive enables simple cleanup.
Preform residue is easily swept up, while handling equipment needs to be wiped down only once or twice a week, says Harvill.
In comparison, liquid epoxy usually requires extensive cleanup procedures.
Edited by: Chanel de Bruyn© Reuse this Comment Guidelines (150 word limit)
Other Seals, Gaskets and Sealing Mechanisms News
Recent Research Reports
Defence 2014: A review of South Africa's defence industry (PDF Report)
Creamer Media’s Defence 2014 report examines South Africa’s defence industry, with particular focus on the key participants in the sector, the innovations that have come out of the sector, local and export demand, South Africa’s controversial multibillion-rand...
Road and Rail 2014: A review of South Africa's road and rail infrastructure (PDF report)
Creamer Media’s Road and Rail 2014 report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail network, the funding and maintenance of these respective networks, and the push to move road...
Real Economy Year Book 2014 (PDF Report)
This edition drills down into the performance and outlook for a variety of sectors, including automotive, construction, electricity, transport, steel, water, coal, gold, iron-ore and platinum.
Real Economy Insight: Automotive 2014 (PDF Report)
This four-page brief covers key developments in the automotive industry over the past 12 months, including an overview of South Africa’s automotive market, trade figures, production and the policies influencing the sector.
Real Economy Insight: Construction 2014 (PDF Report)
This five-page brief covers key developments in the construction industry over the past 12 months. It provides an overview of the sector and includes details of employment in the sector, infrastructure and municipal spending, as well as insight into companies’...
Real Economy Insight: Electricity 2014 (PDF Report)
This five-page brief covers key developments in the electricity industry over the past 12 months, including details of State-owned power utility Eskom’s generation activities, funding and tariffs, independent power producers and prospects for the sector.
This Week's Magazine
The broad-based black economic-empowerment (BBBEE) alignment process in the con-struction sector has begun, dur-ing which the sector codes of the Construction Sector Charter Council (CSCC) will be aligned with the revised Codes of Good Practice (CoGP), which come...
It is second time lucky for Toby Venter. Ten years ago he negotiated to buy the Kyalami racetrack, but “the deal did not materialise”.
Environmental solutions company I-Cat started construction work on its R22-million, 1 949 m2 environmentally sustainable office and warehouse facility, commissioned by I-CAT Environmental Solutions, at a launch event in October. The new sustainable I-CAT campus,...
Effective file synchronisation and sharing across an organisation’s structures can provide the basis for robust mobile-device and document management while maintaining proper backup, version control and content distribution. These are the lessons learned by complex...
Hotel group Carlson Rezidor currently holds the largest hotel pipeline in Africa with 30 hotels and 6 300 rooms under development. The hotel group develops and operates Radisson Blu in the upper upscale segment and Park Inn by Radisson in the mid-market segment. With...