| 摘要 |
<p>#CMT# #/CMT# Thermally stable glass fiber, comprises silicon dioxide (SiO 2) (62-66 mass.%), aluminum trioxide (Al 2O 3) (14-16.4 mass.%), titanium dioxide (TiO 2) (0.8-1.2 mass.%), calcium oxide (CaO) (10-12 mass.%), magnesium oxide (MgO) (4-6 mass.%), zinc oxide (ZnO) (0.8-1.5 mass.%), mixture of sodium- potassium- and lithium- oxide (Na 2O+K 2O+Li 2O) (0.2-0.6 mass.%), cerium oxide (CeO 2) (0.2-0.5 mass.%) and mixture of tellurium-, hafnium- and lanthanum- oxide (TeO 2+HfO 2+La 2O 3) (2-0.5 mass.%). #CMT# : #/CMT# An independent claim is included for preparing the glass fiber comprising coating the textile glass fibers with an aqueous sizing and subsequently thermally treating the glass fibers. #CMT#USE : #/CMT# The thermally stable glass fiber is useful as roving or yarn and/or sewing cotton (claimed). #CMT#ADVANTAGE : #/CMT# The thermally stable glass fiber exhibits very good physico-chemical characteristics, mechanical properties and good chemical and thermal resistance. #CMT#INORGANIC CHEMISTRY : #/CMT# Preferred Process: The sizing takes place by an applicator, preferably a galette- or a sachet- applicator on which the glass surface is applied and the subsequent thermal treatment takes place after a relaxation time of at least 24 hours in a chamber dryer or in a high-frequency dryer. The thermal treatment takes place at 100-180[deg] C. Preferred Composition: The thermally stable glass fiber further comprises ferric oxide (Fe 2O 3). Preferred Components: The amount of: Al 2O 3is 16.5 mol.% or 16 mass%; SiO 2is 64.6 mass%; TiO 2is 1 mass%; Fe 2O 3is 0.1 mass%; CaO is 11.2 mass%; MgO is 4.8 mass%; ZnO is 1.2 mass%; Na 2O+K 2O+Li 2O is 0.5 mass%; CeO 2is 0.3 mass%; and TeO 2+HfO 2+La 2O 3is mass%. The mass ratio of CeO 2to TeO 2+HfO 2+La 2O 3is 1:1. (I) comprises preferably ZnO, Li 2O (0.25 mass%) or CeO 2. The mass ratio of ZnO to CeO2 is 2:1-6:1. The glass fiber exhibits an annealing loss of 0.2-0.8 mass.%. The glass fiber exhibits a chemical stability of: hydrolytic stability of less than 0.1 cm 3>0.01 N hydrochloride; acid stability of less than 0.7 mg/dm 2>; and alkaline stability of less than 175 mg/dm 2>. #CMT#POLYMERS : #/CMT# Preferred Components: The glass fibers with the aqueous sizing comprises 2-3 mass.% of a solid portion comprising polyvinyl acetate-ethylene copolymer (2-4 mass.%); polyamidoamide (0.3-0.7 mass.%); polyvinylalcohol-polyether-mixture (0.1-0.3 mass.%); polyolefin wax (0.1-0.3 mass.%); bonding agent (0.4-0.7 mass.%); and water. #CMT#EXAMPLE : #/CMT# Typical composition comprised (in mass%) of: silicon dioxide (64.6); aluminum trioxide (16); titanium dioxide (1); ferric oxide (0.1); calcium oxide (11.2); magnesium oxide (4.8); zinc oxide (1.2); mixture of sodium- potassium- and lithium- oxide (0.5); cerium oxide (0.3); and mixture of tellurium-, hafnium- and lanthanum-oxide (0.3).</p> |
