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Food packaging latex as well as preparation method and application thereof

A food packaging and latex technology, applied in the field of new polymer materials, can solve the problems of unproposed latex for food packaging, complex production process, and high equipment requirements, and achieve improved vacuum desorption effect, good packaging, and good safety Effect

Active Publication Date: 2013-04-17
HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN101306743A discloses a milk packaging film, the outer film is a polyvinylidene chloride film, the adhesive is one of a single-component or two-component polyurethane solvent or a solvent-free adhesive, and the inner film is black and white polyvinylidene chloride film. Ethylene film, mainly to solve the problems of easy water absorption and low barrier property of the material
[0004] The food packaging materials in the above-mentioned prior art are all multi-layer composite structures, and an adhesive layer needs to be provided between the coating layer and the base layer to ensure that the prepared packaging film does not deform or crack, and there are complicated production processes and equipment requirements. High, high product prices and other issues
None of the prior art has proposed a kind of latex for food packaging. When coating the food packaging base material, it only needs to be coated with the latex, so that the food packaging can have high barrier properties, oil resistance, corrosion resistance, taste retention, and moisture resistance. , anti-mildew, can be directly in contact with food and other properties

Method used

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  • Food packaging latex as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Mixed monomer preparation: mix 89kg of vinylidene chloride, 4.5kg of 2-ethylhexyl acrylate, and 0.5kg of acrylonitrile, stir for 2 hours, and set aside;

[0030] (2) Preparation of mixed polymeric emulsifier: mix 1.2kg of COPS-1, 1kg of 2A-1 emulsifier, and 6kg of methacrylic acid, dilute with water to 20kg, stir and mix at high speed, and set aside;

[0031] (3) Initiator preparation: Dilute 80 g of tert-butyl hydroperoxide and 80 g of sodium formaldehyde sulfoxylate to a concentration of 2% by mass, and set aside;

[0032] (4) Seed polymerization reaction: Add 64kg of deionized water or soft water, 20g of ammonium acetate additive, 1g of ferrous chloride, 120g of seed polymerization emulsifier sodium dodecylbenzenesulfonate, and 280g of MA-80 into a 200L reactor In the process, seal the kettle, replace with nitrogen for 3 times, vacuumize, inhale 5% (weight) of the mixed monomer prepared in step 1, cold disperse for 0.5h, heat up to 47°C, and pump continuously at ...

Embodiment 2

[0042](1) Mixed monomer preparation: mix 91kg of vinylidene chloride, 4.5kg of 2-ethylhexyl acrylate, and 0.5kg of acrylonitrile, stir for 2 hours, and set aside;

[0043] (2) Preparation of mixed polymeric emulsifier: mix 1.2kg of COPS-1, 1kg of 2A-1 emulsifier, and 4kg of methacrylic acid, dilute with water to 20kg, stir and mix at high speed, and set aside;

[0044] (3) Initiator preparation: Dilute 80 g of tert-butyl hydroperoxide and 80 g of sodium formaldehyde sulfoxylate to a concentration of 2% by mass, and set aside;

[0045] (4) Seed polymerization reaction: Add 64kg of deionized water or soft water, 20g of ammonium acetate additive, 1g of ferrous chloride, 120g of seed polymerization emulsifier sodium dodecylbenzenesulfonate, and 280g of MA-80 into a 200L reactor In the process, seal the kettle, replace with nitrogen for 3 times, vacuumize, inhale 5% (weight) of the mixed monomer prepared in step 1, cold disperse for 0.5h, heat up to 47°C, and pump continuously at a...

Embodiment 3

[0048] (1) Mixed monomer preparation: mix 90kg of vinylidene chloride, 5.7kg of 2-ethylhexyl acrylate, and 0.3kg of acrylonitrile, stir for 2 hours, and set aside;

[0049] (2) Preparation of mixed polymeric emulsifier: mix 1.2kg of COPS-1, 1kg of 2A-1 emulsifier, and 4kg of methacrylic acid, dilute with water to 20kg, stir and mix at high speed, and set aside;

[0050] (3) Initiator preparation: Dilute 80 g of tert-butyl hydroperoxide and 80 g of sodium formaldehyde sulfoxylate to a concentration of 2% by mass, and set aside;

[0051] (4) Seed polymerization reaction: Add 64kg of deionized water or soft water, 20g of ammonium acetate additive, 1g of ferrous chloride, 120g of seed polymerization emulsifier sodium dodecylbenzenesulfonate, and 280g of MA-80 into a 200L reactor In the process, seal the kettle, replace with nitrogen for 3 times, vacuumize, inhale 5% (weight) of the mixed monomer prepared in step 1, cold disperse for 0.5h, heat up to 47°C, and pump continuously at ...

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Abstract

The invention discloses food packaging latex, as well as a preparation method and an application thereof. The food packaging latex is prepared by taking a certain amount of vinylidene chloride, acrylic acid-2-phthalic acid ester, vinyl cyanide and methylacrylic acid as mixed monomers, selecting specific seed emulsifier and mixed emulsifier, and adopting a specific seed emulsion polymerization method. The food packaging latex can be directly applied onto a basic material of a food packaging film, and a primer does not need to be applied, so that the production cost of food packages is greatly saved. The food packaging film coated with the food packaging latex is high in barrier property, oil-resistant, corrosion-resistant, odor-resistant, moisture-proof and mould-proof, can be directly contacted with food, and is flame-resistant and low in monomer residue content; and the food packaging latex is excellent in stability.

Description

Technical field [0001] The invention relates to latex, especially latex for food packaging and its preparation method and application, belonging to the field of new polymer materials. Background technique [0002] Polyvinylidene chloride (PVDC) is a non-toxic, tasteless, safe and reliable high-barrier material. Polyvinylidene chloride (PVDC) latex has been widely used in food packaging. , also has oil resistance, corrosion resistance, taste retention, excellent moisture resistance, mildew resistance, direct contact with food and other properties, and also has excellent printing performance. [0003] Patent CN1535814A discloses a PVDC laminated composite high-temperature resistant retort food packaging film, the middle layer PVDC (copolymer film of vinylidene chloride and vinyl chloride) and two layers of two-layer polyurethane solvent-free adhesive on both sides respectively Connected, mainly to solve the problems of high barrier, transparent and high temperature resistance...

Claims

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Application Information

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IPC IPC(8): C08F214/10C08F220/18C08F220/06C08F4/40C08F2/26C09D127/08C09J127/08B65D65/42
Inventor 方勇邢青涛
Owner HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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