Alkali-free ultrafine glass fiber formula

Abstract

An alkali-free ultrafine glass fiber formula includes the following components, in mass percentage calculated based on 100 Kg: SiO2: 50% to 65%, Al.sub.2O.sub.3: 10% to 16.5%, CaO: 17% to 28%, MgO: 0.2% to 4.0%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.5%, Li.sub.2O: 0.1% to 0.7%, Fe.sub.2O.sub.3: 0.05% to 0.6%, TiO.sub.2: 0.1% to 1%, and impurities: the balance. In the preparation of alkali-free ultrafine glass fibers, no fluorine and boron-containing raw materials are used, and CeO.sub.2 and Li.sub.2O are introduced, which avoids the use of B.sub.2O.sub.3 and F that have a large impact on the environment, and reduces environmental pollution. A single fiber strength of prepared glass fibers is about 9% higher than that of the traditional E glass fibers, and the comprehensive performance of a prepared glass fiber product is significantly superior than that of the existing E glass fiber product.

Claims

1. An ultrafine glass fiber formula, comprising the following components, in mass percentage: SiO.sub.2: 50% to 65%, Al.sub.2O.sub.3: 10% to 16.5%, CaO: 17% to 28%, MgO: 0.2% to 4.0%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.5%, Li.sub.2O: 0.1% to 0.7%, Fe.sub.2O.sub.3: 0.05% to 0.6%, TiO.sub.2: 0.1% to 1%, and impurities: the balance; wherein the components do not comprise B.sub.2O.sub.3 and F.

2. The ultrafine glass fiber formula according to claim 1, comprising the following components, in mass percentage: SiO.sub.2: 50% to 62%, Al.sub.2O.sub.3: 12% to 16.5%, CaO: 19% to 25%, MgO: 0.2% to 2.0%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.5%, Li.sub.2O: 0.1% to 0.7%, Fe.sub.2O.sub.3: 0.05% to 0.45%, TiO.sub.2: 0.1% to 1%, and impurities: the balance.

3. The ultrafine glass fiber formula according to claim 1, comprising the following components, in mass percentage: SiO.sub.2: 50% to 55.5%, Al.sub.2O.sub.3: 14% to 16.5%, CaO: 19% to 25%, MgO: 0.2% to 0.5%, Na.sub.2O and K.sub.2O: 0.1% to 0.8% in total, CeO.sub.2: 0.1% to 0.4%, Li.sub.2O: 0.1% to 0.5%, Fe.sub.2O.sub.3: 0.05% to 0.45%, TiO.sub.2: 0.1% to 1%, and impurities: the balance.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

(1) The present disclosure will be further described below in conjunction with examples, and the content of the present disclosure is not restricted by the following examples. When a total content of all components is slightly less than or greater than 100%, it can be comprehended that the residual content refers to impurities or a small amount of unanalyzable components. According to the selected components and mass percentages thereof selected in each of Examples 1 to 5 of the present disclosure, corresponding raw materials (including powders of kaolin, pyrophyllite, quartz sand, quicklime, limestone, lithium-containing tailing, cerium oxide, etc.) were weighed and thoroughly mixed in a pneumatic homogenizer to obtain a mixed batch; the mixed batch was delivered to a silo at a furnace head and fed into a tank furnace to undergo high temperature melting to form molten glass; and the molten glass flowed into an operational channel and was drawn into glass fibers by a drawing machine through a platinum-rhodium alloy bushing. Specific mass percentages of raw materials calculated based on 100 Kg were shown in Table 1.

(2) TABLE-US-00001 TABLE 1 Performance test data of Examples 1 to 5 Comparative Example Example Component/% Traditional E glass fiber 1 2 3 4 5 SiO.sub.2 54.1 61 60 60 59.5 58 Al.sub.2O.sub.3 14 13 13.2 13.5 13.1 14.4 CaO 22.2 22.5 23 22.7 23 24 MgO 1.1 1.5 1.5 1.5 1.8 1 Na.sub.2O 0.35 0.5 0.5 0.5 0.55 0.4 K.sub.2O 0.4 0.25 0.25 0.25 0.21 0.2 CeO.sub.2 0 0 0 0.15 0.4 0.4 Li.sub.2O 0 0.25 0.5 0.5 0.5 0.6 Fe.sub.2O.sub.3 0.32 0.31 0.35 0.31 0.31 0.28 TiO.sub.2 0.45 0.42 0.4 0.38 0.42 0.4 B.sub.2O.sub.3 6.35 0 0 0 0 0 F.sub.2 0.55 0 0 0 0 0 Single fiber strength (MPa) 2200 2408 2405 2403 2400 2398 Shaping temperature (° C.) 1175 1290 1287 1282 1282 1263 Softening point (° C.) 860 915 915 911 911 904 Bubble content (/ounce) 8 35 30 10 2 2

(3) It can be seen from Table 1 that, after CeO.sub.2 and Li.sub.2O are introduced in the production of ultrafine glass fibers, prepared glass fibers show a single fiber strength that is about 9% higher than that of the traditional E glass fibers; compared with ultrafine glass fibers prepared according to a formula including only Li.sub.2O, ultrafine glass fibers prepared according to the formula including both CeO.sub.2 and Li.sub.2O have a lower bubble content and a better fining effect; and due to a low bubble content, fiber breakage does not tend to occur during drawing, and it is more likely to draw ultrafine glass fibers.