Corrosion-resistant film material and preparation method thereof

Abstract

The invention discloses a corrosion-resistant film material and a preparation method thereof. A packaging material mainly comprises a carrier material, bonding resin and phenolic epoxy resin for a high-temperature adhesive, wherein the carrier material is prepared from the following raw materials in parts by weight: 2-13 parts of an ethylene-vinyl acetate copolymer, 2-13 parts of high polymer polypropylene and 1-14 parts of polysulfone; the fixed weight of the ethylene-vinyl acetate copolymer is required to be 20-35 g / m<2>, the fixed weight of high polymer polypropylene is required to be 15-25 g / m<2>, and the fixed weight of polysulfone is required to be 13-30 g / m<2>; the bonding resin is melamine formaldehyde resin or melamine urea formaldehyde resin suitable for dipping, and the solid content of the resin is 41-52%. The corrosion-resistant film material has the characteristics of strong stretching capability, excellent weather resistance and moderate deformation temperature, can be resistant to strong acid, strong base and an organic solvent, and is convenient to use and simple to operate.

Description

technical field [0001] The invention relates to the field of packaging materials and production methods thereof, in particular to a corrosion-resistant film material and a preparation method thereof. Background technique [0002] Due to environmental reasons, steel workpieces often undergo corrosion during production and later storage, which adversely affects the mechanical properties of the workpiece and the corrosion resistance during use, and seriously affects the service life of the workpiece. [0003] Ethylene-vinyl acetate copolymer has good softness, rubber-like elasticity, good flexibility, transparency and surface gloss at minus 50°C, good chemical stability, anti-aging and ozone resistance Good strength, non-toxic, good blendability with fillers, good coloring and molding processability. In general, the main products of ethylene-vinyl acetate copolymers with a vinyl acetate content of less than 5% are films and sheets, injection molding, molded products, foamed pr...

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Problems solved by technology

[0006] However, ethylene-vinyl acetate copolymer has a low heat distortion temperature, is flammable, and has poor weather resistance. Therefore, the anti-corrosion film material used alone on the surface of steel workpieces has poor anti-corrosion performance and unsafe factors.

Polysulfone resin has the following disadvantages: firstly, its resistance to organic solvents and strong acids is poor, and its molding temperature is high; in addition, its finished products are prone to stress cracking and have low fatigue strength

Therefore, applying either of the above two alone to the anti-corrosion film material on the surface of steel workpieces cannot achieve the target effect.

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