Latex for food packaging and its preparation method and application

A technology of food packaging and latex, which is applied in the direction of coating, etc., can solve the problems of latex for food packaging, complex production process, high product price, etc., and achieve improved vacuum desorption effect, good wrapping property, and good emulsion stability Effect

Active Publication Date: 2015-12-23
海南海达丰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Latex for food packaging and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Mixed monomer preparation: mix 89kg of vinylidene chloride and 5kg of methyl methacrylate, stir for 2 hours, and set aside;

[0030] (2) Preparation of mixed polymeric emulsifier: mix 1.2kg of AMPS, 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: Add 64kg of deionized water, 20g of ammonium acetate, 1g of ferrous chloride, 120g of seed polymerization emulsifier sodium dodecylbenzenesulfonate, and 280g of MA-80 into a 200L reaction kettle, and 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 the prepared initiator continuously at a speed of 8kg / 48h , control the reaction...

Embodiment 2

[0042] (1) Mixed monomer preparation: mix 92kg of vinylidene chloride and 4kg of methyl methacrylate, stir for 2 hours, and set aside;

[0043](2) Preparation of mixed polymeric emulsifier: mix 1.2kg of AMPS, 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: Add 64kg of deionized water, 20g of ammonium acetate, 1g of ferrous chloride, 120g of seed polymerization emulsifier sodium dodecylbenzenesulfonate, and 280g of MA-80 into a 200L reaction kettle, and 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 the prepared initiator continuously at a speed of 8kg / 48h , control the reaction ...

Embodiment 3

[0048] (1) Mixed monomer preparation: mix 90kg of vinylidene chloride and 6kg of methyl methacrylate, stir for 2 hours, and set aside;

[0049] (2) Preparation of mixed polymeric emulsifier: mix 1.2kg of AMPS, 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: Add 64kg of deionized water, 20g of ammonium acetate, 1g of ferrous chloride, 120g of seed polymerization emulsifier sodium dodecylsulfonate, and 280g of MA-80 into a 200L reaction kettle, 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 continuously pump the prepared initiator at a speed of 8kg / 48h, Control the reaction temperature ...

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Abstract

The invention discloses latex for packaging foods, a preparation method of the latex, and application of the latex. According to the preparation method, vinylidene chloride, methyl methacrylate and methacrylic acid with a certain amount are adopted and used as mixing monomers, a specific seed emulsifier and a mixed emulsifier are selected, and the special seed emulsion polymerizing method is carried out, thus obtaining the latex. The latex can be directly coated on a food packaging film base material, so that a primer can be saved, and the production cost in food package can be greatly saved; the food packaging film made from the latex has high barrier performance, oil resistance, anticorrosive performance, odor barrier performance, moisture-proofing performance and mould-proofing performance, can be in direct contact with the foods, has the fire resistance, and is low in residues of the monomers. The 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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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/08C08F220/14C08F220/06C08F2/26C09D127/08
Inventor 方勇邢青涛
Owner 海南海达丰实业有限公司
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