Diamond Systems Tritan Guia de Resolução de Problemas descarregar pdf (Página 34)

Part III

Secondary operations

Parts made of Eastman

™

polymers can be assembled using a

wide variety of joining techniques. Solvent bonding, UV-curable

adhesives, and ultrasonic welding are the most common

methods of joining medical devices and are suitable techniques

for joining parts made of Eastman

™

polymers.

Methods for joining parts

made of Eastman

™

polymers

Chemical

• Solvent bonding

• Adhesives

• UV-curable adhesives

Mechanical

• Screws

• Inserts

• Snap ﬁt joints

Thermal

• Ultrasonic welding

• Electromagnetic

• Spin welding

• Hot plate

Solvent bonding

Eastman

™

polymers can be successfully bonded to PVC or

polyurethane tubing. When bonding to PVC tubing, the

following solvent systems are suggested:

• Cyclohexanone

• 50/50 cyclohexanone/methylene chloride

• 50/50 to 80/20 MEK/cyclohexanone

• Methylene chloride

Solvent bonding of PVC tubing to thermoplastic components is

an important step in the fabrication of many medical devices.

When bonding to polyurethane tubing, the following solvent

mixtures are suggested:

• Methylene chloride

• Cyclohexanone

• 50/50 to 80/20 MEK/cyclohexanone

• 50/50 to 20/80 cyclohexanone/methylene chloride

Material Safety Data Sheets providing safety precautions that

should be observed in handling and storing solvents are available

from suppliers on request. You should obtain and review the

available material safety information before handling any of

these products. Appropriate industrial hygiene and other safety

precautions recommended by their manufacturers should be

observed. You must make your own determination of a solvent’s

suitability and completeness for your own use, for the protection

of the environment, and for the health and safety of your

employees and purchasers of your products.

If you are planning to use a bonding method, an Eastman

technical service representative can provide information on

acceptable mixtures and bonding methods. If you use other

systems or methods, they should be tested ﬁrst for bond

strength, chemical stress-crack resistance, and safety.

Adhesive systems

A variety of adhesive systems have been found to work well

with Eastman

™

polymers. For speciﬁc information on adhesive

systems, contact your Eastman technical representative.

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