Casting polyurethane robot track with framework made of aramid fiber and preparation method thereof
A robot, polyurethane technology, applied in the direction of tracked vehicles, motor vehicles, transportation and packaging, etc., to achieve the effect of light weight, high strength insulation, ground protection, and excellent insulation
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Embodiment 1
[0026] 1) Prepolymer preparation
[0027] First connect the oil bath, three-necked flask, condenser tube, and vacuum pump from left to right, and then check whether the air tightness is good. After installing the instrument, 30g conductive carbon black, 40g antimony trioxide, 30g decabromodiphenyl ether are dried and crushed, then mixed with 1000g polytetrahydrofuran ether glycol (PTMG) at 40-50℃ temperature Then use a thermal shearing machine at 3000-4000r / min speed for 10-15min into a homogeneous phase, then stir and dehydrate for 3h under 110℃, -0.096MPa vacuum conditions, cool to 60℃, and quickly mix with 180g diisocyanate The temperature is naturally raised to 85°C for heat preservation, and the reaction is carried out for 2 hours under the protection of nitrogen. After 10 minutes of vacuum degassing, the polyurethane prepolymer is obtained and sealed and stored for later use.
[0028] 2) Preparation of aramid fiber skeleton material
Embodiment 2
[0033] 1) Same as Example 1
[0034] 2) Preparation of aramid fiber skeleton material
[0035] Use silane coupling agent to activate the surface of high-strength, high-modulus aramid fiber to avoid delamination of aramid fiber and matrix material to improve the bonding strength with matrix resin. Then the treated aramid fiber is wound around the mold for 10 times in a whole rope-like way of winding an endless belt.
[0036] 3) Same as Example 1
Embodiment 3
[0038] 1) Same as Example 1
[0039] 2) Preparation of aramid fiber skeleton material
[0040] Use silane coupling agent to activate the surface of high-strength, high-modulus aramid fiber to avoid delamination of aramid fiber and matrix material to improve the bonding strength with matrix resin. Then, the treated aramid fiber is wound on the mold in a whole rope-like way of winding an endless belt for 8 times.
[0041] 3) Same as Example 1
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