Preparation method of polyoxymethylene crude fiber for toughening concrete
A technology of polyoxymethylene and polyoxymethylene resin, which is applied in the field of polyoxymethylene fiber preparation, can solve the problems of no fiber preparation and application, single reinforcement method, limited reinforcement effect, etc. Low, reduce indentation processing, increase the effect of roughness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0028] Put 1000g of polyoxymethylene resin, 1g of carboxylated carbon nanotubes, 50g of carbon fibers (the length of the fibers is 1-3mm), and 5g of polyvinylpyrrolidone into a high-speed mixer, and raise the temperature of the mixer to 80°C After stirring for 8 minutes, stop stirring, and after the material is cooled, extrude and granulate in the screw extruder to obtain modified POM pellets; melt the modified POM pellets in the twin-screw extruder and extrude them into the Cooling and molding in an ethanol cooling bath at 20°C, the distance between the cooling bath liquid surface and the extrusion die is 2mm, the cooled filaments are introduced into a 95°C water bath for washing to remove water-soluble polymers, and at the same time stretch 3 times, and the washing time is 4s, after being dried in a hot oven at 120°C for 20s, enter a hot oven at 140°C for secondary stretching, with a stretching ratio of 1.5 times, and then heat-set in a hot oven at 158°C for 50s, and finally ...
Embodiment 2
[0030] Put 1000g of polyoxymethylene resin, 15g of carboxylated nanocellulose whiskers, 200g of poly-p-phenylene benzobisoxazole fiber (the length of the fiber is 1-3mm), and 10g of polyethylene oxide into the high-speed In the mixer, heat the mixer to 90°C and stir for 5 minutes, then stop stirring. After the material is cooled, extrude and granulate the modified POM pellets in the screw extruder; the modified POM pellets are extruded on the twin-screw After being melted in the machine and extruded through the die, enter the ethylene glycol cooling bath at -60°C to cool and form. The distance between the cooling bath liquid surface and the extrusion die is 5mm, and the cooled silk is introduced into a 95°C water bath for washing to remove water solubility. The polymer is stretched 4 times at the same time, and the washing time is 3.6s. After being dried in a hot oven at 120°C for 40s, it is stretched twice in a hot oven at 160°C. ℃ heat oven for setting for 30s, and finally t...
Embodiment 3
[0032] Put 1000g of polyoxymethylene resin, 10g of carboxylated nanocellulose whiskers, 100g of polyphenylene sulfide fibers (the length of the fibers is 1-3mm), and 30g of polyethylene glycol into a high-speed mixer, Heat the mixer to 100°C and stir for 4 minutes, then stop stirring. After the material is cooled, extrude and granulate the modified POM pellets in a screw extruder; melt the modified POM pellets in a twin-screw extruder After the die is extruded, enter the ethanol and ethylene glycol cooling bath at -30°C (the volume ratio of ethanol and ethylene glycol is 1:1) to cool and form. The distance between the liquid surface of the cooling bath and the extrusion die is 10mm, and the cooling The silk is introduced into a 90°C water bath for water washing to remove the water-soluble polymer, and at the same time, it is stretched twice. The water washing time is 7.2s. After being dried in a 120°C hot oven for 30s, it enters a 160°C hot oven for secondary stretching. Stret...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| melt flow index | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More