Chopped strand for glass paper

Abstract

A chopped strand for a glass paper, characterized in that it has a sizing agent comprising at least one of a surfactant and a water-soluble polymer, and pyrophosphate, which are adhered to the surface thereof. Preferably, pyrophosphate is adhered in an amount of 0.001 to 0.3 mass %. Pyrophosphate may be potassium pyrophosphate and/or sodium pyrophosphate. The strand may further have a silane coupling agent adhered to the surface thereof in an amoun tof 0.001 to 0.1 mass %.

1 . A chopped strand for glass paper, characterized in that a sizing agent having at least one of a surfactant and a water soluble high polymer, and pyrophosphate are adhered to the surface thereof.  
     
     
         2 . A chopped strand for glass paper as set forth in  claim 1 , wherein an adhesion amount of said pyrophosphate is 0.001 to 0.3 mass %.  
     
     
         3 . A chopped strand for glass paper as set forth in  claim 1  or  2 , wherein said pyrophosphate is made of at least one of potassium pyrophosphate and sodium pyrophosphate.  
     
     
         4 . A chopped strand for glass paper as set forth in any of  claims 1  to  3 , wherein 0.0001 to 0.1 mass % of a silane coupling agent is adhered to the surface thereof.  
     
     
         5 . A chopped strand for glass paper as set forth in  claim 4 , wherein said silane coupling agent has at least one of an epoxy silane coupling agent, an amino silane coupling agent, an ureide silane coupling agent, a methacrylic silane coupling agent, a vinyl silane coupling agent, and a styryl silane coupling agent.  
     
     
         6 . A chopped strand for glass paper as set forth in any of  claims 1  to  5 , wherein an adhesion amount of said sizing agent is 0.01 to 1.00 mass %.  
     
     
         7 . A chopped strand for glass paper as set forth in  claim 6 , wherein an adhesion amount of said sizing agent is 0.02 to 0.20 mass %.  
     
     
         8 . A chopped strand for glass paper as set forth in any of  claims 1  to  7 , wherein said sizing agent is added with at least one of a wetting agent, a pH regulator and an antifoaming agent.  
     
     
         9 . A chopped strand for glass paper as set forth in any of  claims 1  to  8 , wherein said surfactant has at least one of an alkyl imidazoline cationic surfactant, a nonionic surfactant and an alkyl amido derivative.  
     
     
         10 . A chopped strand for glass paper as set forth in any of  claims 1  to  9 , wherein said water soluble high polymer has at least one of polyethylene oxide, polypropylene oxide, polyvinyl alcohol, polyoxyethylene rosin ester, polyoxyethylene alkyl polyamino ether, and polyoxyethylene alkyl amide ether.