High-strength SMC composite material resistant to strong acid and base and grid manufacturing method using material

Abstract

The invention relates to a high-strength SMC composite material resistant to a strong acid and alkali and a grid manufacturing method using the material. The material comprises an upper polyethylene film layer, an upper resin paste layer, a chopped glass fiber layer, a continuous glass fiber layer, a lower resin paste layer and a lower polyethylene film layer which are arranged from the top to thebottom in sequence; the upper resin paste layer and the lower resin paste layer have same components, and are separately composed of the following materials in parts by weight: 60-70 parts of linearphenolic modified vinyl resin, 30-40 parts of a low-shrinkage additive, 100-150 parts of nanoscale barium sulfate powder, 2.5-4 parts of a magnesium oxide paste thickening agent, 1.0-2.0 parts of a curing agent BPO, 2-4 parts of a coupling agent, and 3-5 parts of color paste. The SMC composite material provided by the invention has higher compression resistance and tensile strength, and is resistant to strong acid and alkali corrosion; and an SMC molded grid produced by the SMC composite material has strong resistance to the strong acid and alkali corrosion, high mechanical compressive strength, and a smooth surface.

Description

technical field [0001] The invention relates to a high-strength strong acid-base resistant SMC composite material and a grid manufacturing method using the material. Background technique [0002] Molded grids are widely used in the market now, which is a kind of continuous glass fiber as reinforcement material. Bunches of continuous glass fiber yarns are laid in the mold by hand, and unsaturated polyester resin is used as the matrix. , adding an appropriate amount of accelerator and curing agent, at a mold temperature of 30-45°C, pouring it into a grooved mold with glass fiber yarn laid in advance, and locking and compacting it for 1.0-1.5 hours. Sheet-like material with many spaces. [0003] Adopting this method has the following disadvantages: 1. The existing production efficiency is relatively low, and it takes about 2 hours to produce each mold. With the increase of the usage of the molded grid, the production efficiency becomes the main factor affecting the development...

AI Technical Summary

Problems solved by technology

[0003] This method has the following disadvantages: 1. The existing production efficiency is low, and the production takes about 2 hours per mold. With the increase in the use of molded grids, production efficiency becomes the main factor affecting the development of molded grids

2. There are many hole defects in the product. Since the process uses manual locking and compaction, it is impossible to pressurize with a high-pressure press equipment, resulting in a large amount of air trapped in the cast body that cannot be discharged, solidified inside the product, and produces a large number of holes. defect

3. The anisotropy of the product is poor, and the interlayer shear force of the cast body is low. Since the process is a continuous glass fiber yarn laid one by one, there is only continuous glass fiber reinforcement in the horizontal direction. However, there is no reinforcing material in the vertical direction, and interlayer cracks always appear when the product bears a large load, which reduces the bearing capacity of the material.

4. Serious environmental pollution

5. The installation is not flexible

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