Method for preparing single polymer composite material by using two-component composite fiber
A composite fiber fabric and composite fiber technology, which is applied in fiber processing, fabrics, textiles, and papermaking, etc., can solve the problems of not considering material recycling and reuse, complex process equipment and preparation processes, and increase in composite material waste. Meet modern environmental protection requirements, ideal impregnation effect, easy to recycle and reuse
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[0020] The preparation method of the bicomponent composite fiber of the present invention to manufacture a single polymer composite material comprises the following steps:
[0021] (1) Preparation of bicomponent composite fibers
[0022] The reinforcing phase polymer and the matrix polymer are subjected to two-component composite spinning according to the designed weight ratio. For example, the arrangement of the composite fibers adopts the core-sheath type arrangement, the core material is the reinforcing phase polymer, and the surface material is the matrix polymer. things. Preparation of bicomponent composite fibers.
[0023] Composite spinning process parameters are as follows:
[0024] Spinning speed: 20-1000m / min, preferably 400-800
[0025] Stretch ratio: 2~8, preferably 4~6
[0026] Composite fiber linear density: 1-200tex, preferably 3-50tex
[0027] Weight percentage of reinforcing phase polymer: 20%-85%, preferably 30%-60%.
[0028] (2) Preparation of composit...
Embodiment 1
[0034] Composite spinning of PA66 (1000 parts) and PA6 (1000 parts) adopts a core-sheath arrangement, in which PA66 is the core material (reinforcing phase polymer), and PA6 is the surface layer material (matrix polymer). Component composite fibers. The spinning process parameters are as follows: spinning speed: 600m / min, draw ratio: 5, composite fiber linear density: 4.5tex. Then, the obtained conjugate fiber was made into a unidirectional conjugate fiber stitch-bonded fabric on a stitchbonding machine. Then, 12 layers of the obtained unidirectional composite fiber stitch-woven fabric were laminated in the same direction, and then formed by vacuum bag thermocompression at a molding temperature of 235-245°C to obtain a PA66 continuous fiber-reinforced PA6 composite material.
Embodiment 2
[0036] Composite spinning of PET (1000 parts) and PBT (800 parts) in a core-sheath arrangement, in which PET is the core material (reinforcing phase) and PBT is the surface material (matrix) to prepare the corresponding two-component composite fiber . The spinning process parameters are as follows: spinning speed: 500m / min, draw ratio: 5, composite fiber linear density: 4tex. Then, the obtained conjugate fiber was made into a unidirectional conjugate fiber stitch-bonded fabric on a stitchbonding machine. Then, 14 layers of the obtained unidirectional composite fiber stitch-woven fabric were laminated in the same direction, and formed by vacuum bag thermocompression at a forming temperature of 235-245°C to obtain a PET continuous fiber-reinforced PBT composite material.
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