Application Guide: Thermoplastic Polymers and Compounding
BACKGROUND Thermoplastic polymers are characterized primarily by their molecular structure. They soften when heated and re-harden on cooling. Plastic resins are typically customized to meet specific customer applications by adding reinforcements, flame retardants, processing aids, and colorants. Reinforcements are used to enhance mechanical properties, such as flexural modulus, tensile strength and thermal properties such as heat deflection temperature.
PRODUCTS FOR SELECTION   Features   Benefits   A.   Microglass: milled glass  fibers      Short fiber lengths      Wide variety of grades        Stiffness, dimensional  stability, high flow during  molding, and more uniform  isotropic shrinkage vs.  chopped glass      Balance of proper ties to  application     B.   Wollastonite      Natural mineral with  high purity      Needle - like shape      Short fibers with small  diameter      Favorable cost vs. some  glass options      Recyclable      Improved appearance and  mechanical strength vs.  other minerals      Options for tensile stren gth  and flexural modulus     C.   Muscovite mica      Natural mineral with  high purity      Small crystal plates      Tough flexible particles      Platy shape      Less interference on heat  aging      Less reactivity      Recyclable      Better processability and  lower cost vs. synthetic  options      Bette r surface appearance      Less brittle and easier to  compound vs. glass options      Reduced permeability      Warpage and shrinkage  control for large, thin parts D.   Microwool: processed  mineral fiber      Complex silicate  chemistry      Low bulk density      Small diameter with  long length      Processed & treated in  USA      Lower wear on processing  equipment      Lower weight parts      Increased flexu ral strength  and modulus, tensile  strength, HDT and  dimensional stability      Excellent economics   SUGGESTED LOADINGS Product   Weight %   Microglass   10  -   35   Wollastonite   15  -   40   Muscovite Mica   20  -   40   Microwool   15  -   45
Note: Loading is primarily dictated by resin selection. For best shrinkage and warpage results, try a blend of mica with either milled glass fiber or wollastonite. Other mechanical properties may also be improved by blending reinforcements. EXPECTED OBSERVATIONS Overall increase in mechanical properties. Median particle size can significantly affect tensile strength and flexural modulus. Particle size can be a determining factor in deciding importance of elongation versus tensile strength. Platy minerals, such as mica, are very useful in providing uniform shrinkage. The aspect ratio of platy products can play a significant role in increasing flexural modulus. Mixing methods and speeds influence flexural modulus and flexural strength. COMMENTARY Applications and resins can vary. It is crucial to match reinforcements, reinforcement blends, and concentrations to optimize properties. Contact Fibertec for discussions on specific product grades and surface treatments to achieve desired end results.
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Thermoplastics
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Technical / Sales Support: contact Bill Simons for application bulletins, samples, or technical assistance.
Final determination of the suitability of the material for the use contemplated is the sole  responsibility of the user. No warranty is expressed or implied, and the manufacturer’s  only obligation shall be to rep lace such quantity of the product proven to be defective.
   Since 1986
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© Copyright 2015 Fibertec, Inc. All Rights Reserved
35 Scotland Boulevard Bridgewater, MA 02324  Phone 508.697.5100 Fax 506.697.7140
Application Guide: Thermoplastic Polymers and Compounding
BACKGROUND Thermoplastic polymers are characterized primarily by their molecular structure. They soften when heated and re-harden on cooling. Plastic resins are typically customized to meet specific customer applications by adding reinforcements, flame retardants, processing aids, and colorants. Reinforcements are used to enhance mechanical properties, such as flexural modulus, tensile strength and thermal properties such as heat deflection temperature.
PRODUCTS FOR SELECTION   Features   Benefits   A.   Microglass: milled glass  fibers      Short fiber lengths      Wide variety of grades        Stiffness, dimensional  stability, high flow during  molding, and more uniform  isotropic shrinkage vs.  chopped glass      Balance of proper ties to  application     B.   Wollastonite      Natural mineral with  high purity      Needle - like shape      Short fibers with small  diameter      Favorable cost vs. some  glass options      Recyclable      Improved appearance and  mechanical strength vs.  other minerals      Options for tensile stren gth  and flexural modulus     C.   Muscovite mica      Natural mineral with  high purity      Small crystal plates      Tough flexible particles      Platy shape      Less interference on heat  aging      Less reactivity      Recyclable      Better processability and  lower cost vs. synthetic  options      Bette r surface appearance      Less brittle and easier to  compound vs. glass options      Reduced permeability      Warpage and shrinkage  control for large, thin parts D.   Microwool: processed  mineral fiber      Complex silicate  chemistry      Low bulk density      Small diameter with  long length      Processed & treated in  USA      Lower wear on processing  equipment      Lower weight parts      Increased flexu ral strength  and modulus, tensile  strength, HDT and  dimensional stability      Excellent economics   SUGGESTED LOADINGS Product   Weight %   Microglass   10  -   35   Wollastonite   15  -   40   Muscovite Mica   20  -   40   Microwool   15  -   45
Note: Loading is primarily dictated by resin selection. For best shrinkage and warpage results, try a blend of mica with either milled glass fiber or wollastonite. Other mechanical properties may also be improved by blending reinforcements. EXPECTED OBSERVATIONS Overall increase in mechanical properties. Median particle size can significantly affect tensile strength and flexural modulus. Particle size can be a determining factor in deciding importance of elongation versus tensile strength. Platy minerals, such as mica, are very useful in providing uniform shrinkage. The aspect ratio of platy products can play a significant role in increasing flexural modulus. Mixing methods and speeds influence flexural modulus and flexural strength. COMMENTARY Applications and resins can vary. It is crucial to match reinforcements, reinforcement blends, and concentrations to optimize properties. Contact Fibertec for discussions on specific product grades and surface treatments to achieve desired end results.
Call Us:  (508) 697-5100
Thermoplastics
Quality                Service                               Price Site Navigation
Technical / Sales Support: contact Bill Simons for application bulletins, samples, or technical assistance.
Final determination of the suitability of the material for the use contemplated is the sole  responsibility of the user. No warranty is expressed or implied, and the manufacturer’s  only obligation shall be to rep lace such quantity of the product proven to be defective.
   Since 1986
Mica Microglass Microwool Wollastonite
© Copyright 2015 Fibertec, Inc. All Rights Reserved
35 Scotland Boulevard Bridgewater, MA 02324  Phone 508.697.5100 Fax 506.697.7140