Polyvinyl dichloride (PVDC) latex special for slick paper used for food packaging and preparation method thereof and application thereof

Abstract

The invention discloses a polyvinyl dichloride (PVDC) latex special for slick paper used for food packaging and a preparation method thereof and application thereof. The PVDC latex is obtained by a mixed monomer, an auxiliary, an initiating agent, a mixed type emulsifying agent and a seeded emulsifying agent, wherein the mixed monomer contains vinylidene chloride, vinyl cyanide and acrylic acid, the mixed type emulsifying agent contains a COPS-1 emulsifying agent and a 2A-1 emulsifying agent, and the seeded emulsifying agent contains sodium dodecyl benzene sulfonate. Due to the facts that according to the PVDC latex, the mixed type emulsifying agent containing reaction type emulsifying agents is adopted, and the acrylic acid is added together with the reaction type emulsifying agents in an emulsion polymerization stage, the prepared PVDC latex is good in stability. Microcrystalline wax which has a function of defoaming enables monomer residual volume in the latex to be lower. The slick paper coated with the PVDC latex is environment-friendly, degradable, good in barrier property and oil resistance, capable of reaching an effect of aluminum foil packaging materials when serving as packaging materials, and capable of being used for food packaging. When coating amount of the latex is 12g/m2, steam transit amount is less than or equal to 3g/m2.24h and oxygen permeability is less than or equal to 7g/m2.24h. When the coating amount is added to be 15g/m2, effects of aluminum foil packaging materials which are used for food packaging can be achieved.

Description

technical field [0001] The invention relates to a PVDC latex, in particular to a special PVDC latex for glossy paper used in food packaging and a preparation method and application thereof, belonging to the field of polymer materials. Background technique [0002] Aluminum foil wrapping paper materials are used in food, cigarettes, and pharmaceutical packaging because of their advantages such as moisture-proof, air-tight, light-shielding, corrosion-resistant, fragrance-preserving, non-toxic, tasteless, and beautiful. However, aluminum foil wrapping paper materials are expensive and difficult to print , non-degradable, technically difficult to recycle, not environmentally friendly. Currently, high-barrier coated packaging films such as polyvinylidene chloride latex coated packaging films have been used in the packaging of cigarettes, medicines, and food. [0003] Glossy paper can be used as a packaging material because of its soft texture, smooth surface, printability, and l...

AI Technical Summary

Problems solved by technology

[0003] Glossy paper can be used as a packaging material because of its soft texture, smooth surface, printability, and low cost. In order to make it meet food packaging standards, it needs to be improved in terms of oxygen resistance, water resistance, and oil resistance. There are few reports on polyvinylidene chloride latex coated glossy paper to improve its oxygen barrier, water barrier, oil resistance and other characteristics.

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