Boiling-resistant PVDC (polyvinyl dichloride) water-based emulsion

Abstract

The invention discloses a boiling-resistant PVDC (polyvinyl dichloride) water-based emulsion which is composed of the following components in parts by weight: 88-95 parts of vinylidene chloride, 5-12 parts of comonomer, 0.10-0.3 part of seed emulsifier, 0.02-0.05 part of pH regulator, 1.0-3.0 parts of emulsifier, 0.03-0.2 part of initiator and 100 parts of deionized water. The boiling-resistant PVDC water-based emulsion disclosed by the invention is suitable for coating a biaxially-oriented nylon film; the formed film has favorable obstruction property; the prepared coated film has favorable boiling whitening resistance; and the boiled coated film has transparent appearance, and can be widely used in packaging materials for boiling-sterilized foods, such as fruits and vegetables.

Description

technical field [0001] The invention relates to a PVDC copolymer emulsion, more specifically, the invention relates to a retort-resistant PVDC aqueous emulsion. Background technique [0002] Polyvinylidene chloride (PVDC) polymer material, as a packaging material with good comprehensive barrier properties, is safe and non-toxic, and has a wide range of applications in the field of food packaging. The application technology of general-purpose PVDC emulsion in food coating film BOPP and BOPET film is mature. However, there are following deficiencies in the packaging of exported boiled fruits and vegetables: [0003] 1. The packaged food provided needs to be cooked and processed by consumers before they can be eaten, which is a waste of time; [0004] 2. The food provided has not been sterilized by high temperature and has a limited shelf life; [0005] 3. The packaging is opaque, and the packaged objects cannot be seen. [0006] In response to the above shortcomings, peopl...

AI Technical Summary

Problems solved by technology

[0003] 1. The packaged food provided needs to be cooked and processed by consumers before they can be eaten, which is a waste of time;

[0004] 2. The food provided has not been sterilized by high temperature and has a limited shelf life;

[0005] 3. The packaging is opaque, and the packaged objects cannot be seen

The disadvantage is that this method uses a commercially available general-purpose PVDC emulsion to make a retort-resistant PVDC water-based emulsion coating film, but the PVDC emulsion coating film made of a general-purpose PVDC emulsion is foggy and "whitened" during boiling. ", the barrier property decreases, the transparency becomes poor, which affects the appearance and performance of packaging products

Therefore, commercially available general-purpose PVDC emulsions still have certain defects in the application of boiled food packaging.

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