SEMICONDUCTOR CASE STUDY
HOT MELT ADHESIVE DISPENSINGMACHINE & RECIPROCATING NEEDLEOMNISEAL® SPRING-ENERGIZED SEALSPFAS-FREE* Hot Melt Adhesive Dispensing Machine &Reciprocating Needle
Dimitra Papagianni & Beatrice Borde, March 2024
WEAR RESISTANCE SEAL RELIABILITY

LONGEVITY

Environment
A hot melt adhesive dispensing machine applies hot melt adhesives in controlled
patterns and is commonly used in industries such as packaging, electronics, orwoodworking. Adhesive is stored in a heated reservoir where it remains in molten state.
When the machine is activated, the adhesive is pumped through a nozzle or dispensing
gun. Depending on the settings (speed, needle geometry and more), the glue isdispensed as small dots or a continuous line.

Challenge
A typically small (2.5 mm) seal serves a critical function in maintaining a controlled andprecise dispensing process. The needle makes reciprocating movements (0.2 to 0.8 m/s)
to apply an adhesive flow with different solvent chemistries and viscosities. The system
operates at a wide temperature (40°C to 200°C) and pressure range (0 to 100 bar). The
seal ensures that no unintended flow will occur and internal components remain
protected, keeping the adhesive contained within the dispensing path. Applications
conditions require the seal to have a very low deformation or compression set whileremaining flexible, exhibiting excellent wear resistance, and being chemically compatible
with the various glues and solvents specified by the customer.
To comply with customer demand for a PFAS-FREE sealing solution, this case study
application does not use fluoropolymer (usually suitable material for this kind of

demanding application).

SolutionDue to our many years of experience in hot melt
adhesive dispensing applications, we were able todesign a custom, Omniseal® spring-energized sealthat combined a precision fit. Having a widematerial portfolio, we were also able to formulate a
specifically adapted PFAS-Free* material blend thatwithstands temperature variation and demanding
lifetime requirement.

Simulation & Testing Capabilities
At our research and development center in Kontich, Belgium, we have the capability tocomplete our proprietary material simulations with testing in application conditions.
Testing ensures the reliability of our solutions, decreasing the development cost and thenumber of development cycles. This process saves customers valuable time in theirchallenge of replacing fluoropolymer materials.

Benefits•

PFAS-Free* sealing solution, avoiding
supplychain

potential

issueswithgrowing regulation•

Low friction and wear for long life•

Thermal stability•

Chemical resistance and compatibility
with different types of adhesives•

Continuous performance under allpressure conditions•

Cost-effective

PFAS-Free* here means we do notintentionally add PFAS material in thesolution, but does not exclude thepossibility of traces, as these materials arecommon in the environment.

Design Expertise & Customized
Solutions for Your Extreme Applications
Omniseal Solutions is a global engineering leader with over
65 years of historical legacy, relentlessly dedicated to thedesign and manufacture of precision sealing and wear
control solutions that protect critical applications in themost demanding environments and passionately driven topush ”Beyond the Boundaries of Possible.”

Contact Our Expert
Branko Rogovic
District Sales Manager Semi-conductor
California, USA+1 619-200-0822
branko.rogovic@saint-gobain.com
Omniseal Solutions

help@omniseal-solutions.com
www.omniseal-solutions.com

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