Superior Silicone Bonding Technology

At Minnesota Rubber and Plastics, we are more than a molder of high performance elastomers and thermoplastics to the medical industry. We provide the comprehensive services, in both engineering design and advanced materials development, required for the best end product possible. Our class 10,000 and 100,000 clean rooms and assembly services complement our high volume molded parts capabilities, and provide our customers with the critical quality and delivery requirements they have come to expect.

Materials and Design Support For:

• Time To Market Needs
• Silicone Molding – Bonding
• High Performance Plastics
• Rubber to TPE Conversions
• Metal to Plastic Conversions
• Global Manufacturing
• Clean Room Molding – Assembly
• USP Class VI and FDA Compliant Compounds

Applications Include:

• Valves
• Pumps
• Catheters
• Connections
• Diaphragms
• Plunger Tips
• Prosthetics
• Disposables
• Lab Equipment
• Diagnostic Products
• Surgical Instruments

LSR (Liquid Silicone Rubber) Molding:

Components molded with LSR have many of the property characteristics of Millable Gum Silicone and Heat Cured Rubber (HCR) including:

• Excellent heat resistance up to +225°C/437°F
• Good resistance to steam, ozone, UV light, radiation and weathering
• Excellent electrical resistance
• Good resistance to aging
• Physical inertness
• High mechanical strength
• Thermoset material

Typical LSR Properties Include:

Press-cured ASTM slabs of selected LSR grades show the following typical properties:

Durometer	ASTM D2240	Shore A	10 - 80
Tensile Strength	ASTM D412	psi	1,150 - 1,750
Elongation at Break	ASTM D412	%	300-900
Tear Strength	ASTM D624B	ppi	115-250
Rebound Resilience	ASTM D1054	%	25-70
Compression Set (Not postcured.)	ASTM D395 22h/175°C	%	10-60
Compression set at elevated temperatures can be improved by postcuring (4h/200°C/392°F) and will reach 10 to 25% (22h/175°C/347°F).
For design criteria request our Elastomers and Thermoplastics Engineering Design Guide.

Creating Value With Innovative Solutions

Experience on your side.

Our resources provide over 60 years of injection molding and manufacturing experience. Because of our unique ability to offer both rubber and plastic combination components, including complete assemblies, we can offer greater engineering design and production efficiencies thereby reducing development time, minimizing costs and decreasing your time-to-market.

What's more, we know how to maintain the integrity of your basic design while taking into consideration factors such as shrink distortion and parting lines. As the relationship between materials, parts, and end-use performance need to be addressed, we also know how to solve problems arising from torque valves and sealing contacts. We then ensure that the rubber and plastic materials complement each other's tolerance capabilities. Once the design is complete, we can follow through with testing using tools, such as FEA, where benefits include increased strength, decreased material usage and reduced costs.

Services designed to help you.

Our state-of-the-art facilities offer comprehensive design services that advance your programs:

• Preliminary engineering assistance
  Mechanical design review
• Materials engineering
  Materials R&D
  Specialty compounds
• Rapid mold design and development
  Complete prototype services
• Design engineering
  Metal-to-plastic conversions
  Rubber-to-TPE conversions
  Plastic-to-Plastic
• Process engineering
  Mold flow analysis
  Functional testing
  Leak testing
• Assemblies

Talk to the experts.

When your medical plastic or rubber design requirements seem impossible there's no one better to partner with than Minnesota Rubber and Plastics, we're here to make your tough application a reality.