Double-sided heat-sealed double-sided anti-fog type BOPP film and preparation method thereof

Abstract

The invention relates to a double-sided heat-sealed double-sided anti-fog type BOPP film and a preparation method thereof. It is composed of an inner surface layer, a core layer and an outer surface layer. The inner surface layer, the core layer and the outer surface layer are biaxially stretched after co-extrusion The material of the inner surface layer and the outer layer is composed of polypropylene and anti-sticking agent, and the mass percentages of the components of the inner surface layer and the outer layer are: polypropylene 97.5~98.5%, anti-sticking agent 1.5~ 2.5%; the core layer is composed of polypropylene, anti-fogging agent and smooth agent, and the mass percentages of each component of the core layer are: polypropylene 95.9~97.1%, anti-fogging agent 2.5~3.5%, smooth 0.4~0.6% of the antifogging agent, the anti-fogging agent is composed of the following components by weight percentage: 50% sorbitan monostearate, 35% glycerol monooleate, polyethylene oxide (20) glycerol mono Stearate 15%. The polypropylene raw material selected in the present invention has good processing performance and high mechanical strength; the anti-fogging agent is a mixture of various fatty acids, which has good compatibility with BOPP, and the hydrophilicity is greatly improved by adding ethylene oxide, and the anti-fog Improved performance.

Description

technical field [0001] The invention relates to a double-sided heat-sealed double-sided anti-fog type BOPP film and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] The emergence of anti-fog film not only improves the display of fresh goods, but also effectively prolongs the shelf life and shelf life of fresh goods. The trend of demanding packaging has led to the widespread restriction of PVC cling film in developed countries, while the demand for BOPP anti-fog film has increased significantly in recent years. BOPP anti-fog film has good transparency, anti-fog and display properties, long shelf life, meets the high safety requirements of food packaging, and its hardness and stiffness are extremely high, which can reflect the original appearance of fresh products and even can Improve the display of some relatively soft fresh goods, so BOPP anti-fog film has excellent shelfability and display. [0003] The anti-fo...

AI Technical Summary

Problems solved by technology

The internal anti-fogging agent is added to the resin during the batching. Its advantages are that it is not easy to lose and has long-lasting performance. The disadvantage is that it cannot achieve a good anti-fogging effect for polymers with high crystallinity. The external-coating anti-fogging agent is A surfactant that can be dissolved in organic solvents or water. When used, the solution is applied to the surface of the film or sheet. The advantage is that it is convenient to use and the cost is low. The disadvantage is that it has poor durability and is easy to be washed off or wiped off. Can be used in some occasions where internal anti-fogging agents are ineffective or where durability is not required

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