Epoxy glass cloth laminated sheet (FR-4/G10)

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Epoxy glass cloth laminated sheet (FR-4/G10)
Posting date : Jul 12, 2010
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Free Member Scince Apr 27, 2010
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70-
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2. Base LIJI series Epoxy glass cloth laminated sheet consist of woven glass cloth impregnated with epoxy thermosetting resin, laminated under high temperature and high pressure. The woven glass cloth shall be alkali-free. The sheets possess stable electric property, lower water absorption, higher physical & mechanical performances and excellent machining characteristic, comparing with 3240. Materials owning stated flame retardant, gained SGS certificate, passed toxic and hazardous substance detection (SGS Report). Used for B~F-class electrical motors or electrical equipments as insulating structural components or parts. 3 Performance Requirements for Sheets 3.1 Appearance The surfaces of sheet shall be flat and smooth, free of air bubbles, wrinkles or cracks and reasonably free of other small imperfections such as scratches, dents, etc. The edges of sheet shall be clean cut and be free of delaminations and cracks. The colour shall be substantially uniform, but a few stains are permissible. 3.2 Dimension and allowed deviation 3.2.1 Length and Width of Sheets (see Table 2) Table 2 Width x Length mm Deviation mm 1220 x 1020 ±25 3.2.2 Thickness and its deviation of Sheets (see Table 3) Note: For sheets of nominal thickness not listed in this Table, the allowed deviation shall be the same as the next greater thickness 3.3 Bending Deflection for Sheets (see Table 4) 3.4 The sheets shall be free of cracks, delaminations and scraps when such machining as sawing, drilling, lathing and milling is applied. 3.5 Physical, mechanical and dielectric performance (see Table 5)

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