Process for manufacturing plastic microspheres

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5525274
SERIAL NO

08267252

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Spherical particles having a diameter between 0.007' and 0.040' are formed from melt extruded thermoplastic material suitable for casting on a heated mold surface and melting thereon to form a thin layer of material having a nominal thickness of 0.040' that is cooled and removed from the mold surface as a part having a porosity less than a visually observable threshold. The process includes the steps of providing microspheres formed of blended and melt extruded thermoplastic, plasticizers (if necessary) and pigment additives that constitute less than 5% by weight of the blend and shaped as a smooth round spherical particle. The microspheres may then be distributed as predetermined charge of such microspheres against the heated casting surface to melt the microspheres as a layer of thermoplastic material having a porosity less than 0.003 inches and thereafter cooling and removing the non-porous layer from the casting surface.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BAYER MATERIALSCIENCE LLCPITTSBURGH, PA53

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grimmer, Robert A Berwick, ME 13 171

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Toray Silicone Company, Ltd. (1)
* 5124090 Method for the preparation of silicone gel spheres 6 1989
 
Daicel-Huels Ltd. (1)
* 5244984 Process for producing polymer powder 6 1991
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SUMITOMO CHEMICAL COMPANY, LIMITED (1)
6805822 Method for producing thermoplastic elastomer powder 0 2001
 
INTERNATIONAL AUTOMOTIVE COMPONENTS GROUP NORTH AMERICA, INC. (1)
* 2005/0272,330 Method for embedding a distinguishing aesthetic and/or functional surface feature into a panel surface 1 2004
 
TEKNOR APEX COMPANY (1)
6297297 Flooring containing microbeads 13 2000
 
COLLINS & AIKMAN PRODUCTS CO. (1)
* 2005/0064,178 Cloth texture cover material 5 2004
 
BENECKE-KALIKO AG (1)
* 6166135 Aliphatic sinterable thermoplastic polyurethane moulding compositions of reduced mechanical strength 6 1999
 
TEXTRON AUTOMOTIVE COMPANY INC. (2)
6524509 Method for casting multicolored parts for automotive interior applications 7 2000
6632525 Material and method for manufacturing plastic parts 2 2000
 
BAYER MATERIALSCIENCE LLC (2)
* 5654102 Material for manufacturing plastic parts 5 1995
* 5998030 Material for manufacturing plastic parts 7 1997
* Cited By Examiner