From Limtech

Limtech provides alternative elastomers formulated with FDA-recognized ingredients that meet your biocompatibility requirements. Synthetic polyisoprene is the material of choice to replace natural rubber. It has excellent elongation, memory and toughness properties without the natural proteins linked to human reactions. We process all synthetic polyisoprene elastomers in out Class 100,000 clean room.

Contents 1 Insert Molding

In our lab, we can develop alternative elastomers to enhance your component’s performance and compatibility. Using “cold pot” or runner-less tool design. We produce quality products with minimal waste.

Elastomers offered:

• Synthetic polyisoprene
• Chloroprene
• Fluoroelastomer
• Nirile
• Fluorosilicon

Secondary and finishing processes:

• Slitting
• Laser machining
• Die cutting
• Five-stage cleaning
• Bonding
• Insert Molding
• Assembly and testing

The purpose of this section is to outline in usable and easily understood form the methods used in the manufacture of a dense extruded rubber product, the problems that can arise from these methods and how they affect the finished product. By presenting this side of the process to the user he will be more adequately prepared to convey to the rubber supplier his needs and requirements. He will also be better able to understand the limits and tolerances that can normally be expected of this type product.

It is also the purpose of this section to improve the relationship of suppliers and user through the use of common and meaningful terms and symbols (RMA Designations). Through this better understanding and proper use of RMA Designations by the user, the manufacturer should be better able to supply the needs of the user thereby giving him better economy and satisfaction.

Certain statements and tables in this chapter have been changed to reflect current industry practices to agree with International Standard ISO 3302-1:1996, Rubber – Tolerances for products Part 1: Dimensional tolerances.

The information in this chapter is not intended to apply to thermoplastic elastomers.

Insert Molding

The plastic part is molded first in a separate injection-molding machine and transferred (manually or with a handling robot) into a second injection-molding machine, where the part is molded onto it. This method can be used when:

• Smaller production lots are run
• Already existing equipment can be utilized
• Lower tool cost is needed
• Longer overall cycle time is not an issue
• Higher probability for rejects in not an issue