A kind of low-density carbon fiber rigid insulation felt and preparation method thereof
A technology of rigid thermal insulation felt and carbon fiber, which is applied in the direction of chemical instruments and methods, protective equipment, and other household appliances, can solve the problems of high production cost, many materials, and high longitudinal fiber content, and achieve good thermal insulation performance, reduce quantity, The effect of improving thermal insulation performance
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Embodiment 1
[0032] A preparation method of low-density carbon fiber rigid insulation felt, the steps are as follows:
[0033] (1) Use polyacrylonitrile-based carbon fiber with a carbon content ≥ 92% as raw material, cut the carbon fiber into 3-30mm, comb it into wool with a carding machine and make it into a net tire, and the weight of the net tire is 50g / m 2 , thickness is 4mm, density is 0.06g / cm 3 , the carbon fiber arrangement direction is basically consistent with the plane where the mesh tire is located;
[0034] (2) Use acupuncture method to combine 8 layers of mesh tires into a mesh tire unit, and the density of needle punching is 3-30 needles / cm 2 ; The needle punching direction is longitudinal, and the mesh tire unit laying direction is horizontal, that is, the needle punching direction is perpendicular to the plane where the mesh tire unit is located.
[0035] (3) Adopt mist spraying method to carry out one-sided or double-sided spraying phenolic resin adhesive to the net tir...
Embodiment 2
[0043] A preparation method of low-density carbon fiber rigid insulation felt, the steps are as follows:
[0044] (1) Use polyacrylonitrile-based carbon fiber with a carbon content ≥ 92% as raw material, cut the carbon fiber into 3-30mm, comb it into wool with a carding machine and make it into a net tire, and the weight of the net tire is 100g / m 2 , thickness is 4mm, density is 0.07g / cm 3 , the carbon fiber arrangement direction is basically consistent with the plane where the mesh tire is located;
[0045] (2) Using the acupuncture method, 8 layers of mesh tires are needled and compounded into a mesh tire unit, and the density of needle punching is 15-20 needles / cm; The stabbing direction is perpendicular to the plane where the mesh tire unit is located.
[0046] (3) Use the mist spraying method to carry out single-sided or double-sided spraying of phenolic resin adhesive to the net tire unit made above, and the amount of glue sprayed is 1.0kg / m 2 ;
[0047] (4) Put 0.5m...
Embodiment 3
[0054] A preparation method of low-density carbon fiber rigid insulation felt, the steps are as follows:
[0055] (1) Use polyacrylonitrile-based carbon fiber with a carbon content ≥ 92% as raw material, cut the carbon fiber into 3-30mm, comb it into wool with a carding machine and make it into a net tire, and the weight of the net tire is 100g / m 2 , thickness is 4mm, density is 0.07g / cm 3 , the carbon fiber arrangement direction is basically consistent with the plane where the mesh tire is located;
[0056] (2) Use the needle punching method to combine the 8-layer mesh tire into a mesh tire unit, and the needle punching density is 10-20 needles / cm 2 ; The needle punching direction is longitudinal, and the mesh tire unit laying direction is horizontal, that is, the needle punching direction is perpendicular to the plane where the mesh tire unit is located.
[0057] (3) Adopt the mist spraying method to carry out single-sided or double-sided spraying phenolic resin adhesive t...
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