How to detect glass fiber board using skills?
Release time:
2024-07-16 14:17
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Glass fiber board, also known as glass fiber board, is generally used for soft bag base, and then wrapped with fabric, leather, etc., to make beautiful wall and ceiling decoration.
Glass fiber board, also known as glass fiber board, is generally used for soft bag base, and then wrapped with fabric, leather, etc., to make beautiful wall and ceiling decoration. The application is very extensive. It has the characteristics of sound absorption, sound insulation, heat insulation, environmental protection, flame retardant, etc. Used in plastic mold, injection mold, machinery manufacturing, molding machine, drilling machine, injection molding machine, motor, PCB,ICT fixture, table grinding pad. How to detect glass fiber board using skills?
1. Resin content:
① At least 25mm from the edge of the bonding sheet, cut 3 samples from the left, middle and right in the width direction. The sample size is 100mm × 100mm, and the diagonal is parallel to the warp and weft.
② Weigh one by one (W1), with accuracy to 0.001g.
③ Place the sample in a muffle furnace of 524-593 (and burn for more than 15min, or burn until all carbides are removed.
④ Transfer the sample to a desiccator and cool it to room temperature.
⑤ Weigh one by one (W2), with accuracy to 0.001g.
⑥ Calculation: Resin content =[(W1-W2)/W1]× 100%.
2. Gel time:
① Cut a sample of about 20cm × 20cm from the central part of the bonding sheet, knead the sample to make the resin powder fall into the metal sieve, and then sift it onto a clean white paper.
② Take about 20mg of resin powder and place it in the center of the hot plate of the detector heated to 171(± 0.5 ℃ in advance. Start a stopwatch when the resin powder melts and stir the resin with a wooden toothpick.
③ When the resin thickens and the stopwatch is stopped when the drawing is interrupted, the elapsed time is the gel time.
3. Flow degree of resin:
① Cut 4 samples at a distance of not less than 5cm from the edge of the bonding sheet. The sample size is 100mm × 100mm, and the diagonal is parallel to the warp and weft.
② Weigh (W1), with accuracy to 0.005g.
③ The samples are aligned and stacked, and the release film is added, and then placed between 2 stainless steel plates.
④ Place the steel plate and sample in a press at 170 ℃ ± 2.8 ℃, pressurize once, the unit pressure is 1.4MPa ± 0.2MPa, and keep it for 10min.
⑤ Take out the sample and cool it to room temperature.
⑥ Punch a φ80mm disc from the center of the specimen.
⑦ Weigh the wafer (W2), with accuracy to 0.005g.
⑧ Calculation: degree of fluidity =[(Wl-2W2)/W1]× 100%.
4. Volatile content:
① At least 25mm away from the edge of the adhesive sheet, cut 3 samples from the left, middle and right in the width direction. The sample size is 100mm × 100mm, and the diagonal is parallel to the warp and weft.
② Piece a small hole in one corner of each specimen.
③ Place the sample in a desiccator for 1h.
④ Weigh one by one (W1), with accuracy to 0.001g.
⑤ Hang the sample in the oven and bake it at 163 ℃ ± 2 ℃ for 15min.
⑥ Move the sample to a desiccator and cool it for 10min.
⑦ Weigh one by one (W2), with accuracy to 0.001g.
⑧ Calculation: Volatile content =[(W1-W2)/W1]× 100%
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