Surface powder spraying flame-retardant technology for fibrilia composite material
A composite material and hemp fiber technology, which is applied in the field of flame-retardant composite material preparation, can solve the problems of reducing the mechanical properties of composite materials, reducing the toughness of hemp fiber, weakening the compatibility between hemp fiber and the matrix, and achieving excellent flame-retardant performance and The effect of simple mechanical properties and preparation process
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[0017] Example 1
[0018] A, surface dusting
[0019] Cut the hemp fiber composite felt with a weight of 38g and a size of 170*170mm, and then weigh 2.375g of EG powder and 9.5g of PP powder, spray the PP powder evenly on the upper and lower surfaces of the composite fiber felt, and then spray the EG evenly on the composite material The upper and lower surfaces of the fiber felt.
[0020] B. Hot pressing
[0021] The composite hemp fiber felt prepared by the above steps is placed in a hot pressing mold for preheating, and then a hemp fiber composite board with excellent flame retardancy and mechanical properties is obtained by one-time hot pressing.
[0022] The content and performance of each component of the hemp fiber composite board are shown in Table 1 and Table 2 respectively.
Example Embodiment
[0023] Example 2
[0024] A, surface dusting
[0025] Cut the hemp fiber composite felt with a weight of 38g and a size of 170*170mm, and then weigh 1.425g EG powder, 0.95g APP powder and 9.5g PP powder, mix APP and PP powder evenly and spray on the upper and lower surfaces of the composite fiber felt. Then spray EG evenly on the upper and lower surfaces of the composite fiber mat.
[0026] B. Hot pressing
[0027] The composite hemp fiber felt prepared by the above steps is placed in a hot pressing mold for preheating, and then a hemp fiber composite board with excellent flame retardancy and mechanical properties is obtained by one-time hot pressing.
[0028] The content and performance of each component of the hemp fiber composite board are shown in Table 1 and Table 2 respectively.
Example Embodiment
[0029] Example 3
[0030] A, surface dusting
[0031] Cut the hemp fiber composite felt with a weight of 38g and a size of 170*170mm, and then weigh 1.1875g EG powder, 1.1875g APP powder and 9.5g PP powder, mix APP and PP powder evenly and spray on the upper and lower surfaces of the composite fiber felt. Then spray EG evenly on the upper and lower surfaces of the composite fiber mat.
[0032] B. Hot pressing
[0033] The composite hemp fiber felt prepared by the above steps is placed in a hot pressing mold for preheating, and then a hemp fiber composite board with excellent flame retardancy and mechanical properties is obtained by one-time hot pressing.
[0034] The content and performance of each component of the hemp fiber composite board are shown in Table 1 and Table 2 respectively.
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