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

A technology of food packaging and kraft paper, applied in textiles, papermaking, papermaking, paper coatings, etc., can solve the problems of high cost of vacuum aluminum plating, reduce the barrier effect of packaging containers, etc., and achieve good stability, good water blocking effect, and good heat dissipation sealing effect

Active Publication Date: 2013-04-24
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

The existing barrier layer is mostly made of vacuum aluminum plating, but during production or transportation, if it is folded or twisted, it is easy to cause pinhole-sized holes in the aluminum foil barrier layer inside the packaging material, which will reduce the packaging container. Barrier effect, and the cost of vacuum aluminum plating is high

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Special PVDC latex for kraft paper, the total weight of the copolymerization system is 200kg, and the mixed monomer accounts for 110kg;

[0035] Vinylidene chloride 94.6kg;

[0036] Acrylonitrile 11.11kg;

[0037] Butyl acrylate 3.74kg;

[0038] Acrylic acid 0.55kg;

[0039] Additives: 24g ammonium acetate and 0.8g ferrous chloride;

[0040] Initiator: 160g of tert-butyl hydroperoxide and 160g of sodium formaldehyde sulfoxylate;

[0041] Emulsifier: 800 g of sodium paraffin sulfonate and 800 g of sodium dodecylbenzene sulfonate;

[0042] Seed emulsifier: 50g of sodium dodecylbenzenesulfonate and 400g of 2A-1 emulsifier;

[0043] The specific operation process is:

[0044] 1) Preparation of raw materials:

[0045] (1) Preparation of mixed monomers, mixing vinylidene chloride, acrylonitrile, butyl acrylate and acrylic acid of the above weight, and stirring for 2 hours to prepare mixed monomers;

[0046] (2) preparation of emulsifying agent, sodium paraffin sulfona...

Embodiment 2

[0058] Special PVDC latex for kraft paper, the total weight of the copolymerization system is 200kg, and the mixed monomer accounts for 120kg;

[0059] Vinylidene chloride 96kg;

[0060] Acrylonitrile 20.4kg;

[0061] Butyl acrylate 3.36kg;

[0062] Acrylic acid 0.24kg;

[0063] Additives: 30g of ammonium acetate and 1g of ferrous chloride;

[0064] Initiator: 320g of tert-butyl hydroperoxide and 320g of sodium formaldehyde sulfoxylate;

[0065] Emulsifier: 1.2 kg of sodium secondary alkane sulfonate and 1.2 kg of sodium dodecylbenzene sulfonate;

[0066] Seed emulsifier: sodium dodecylbenzenesulfonate 90g and 2A-1 emulsifier 460g;

[0067] The specific operation process is:

[0068] 1) Preparation of raw materials: The preparation of mixed monomer, seed emulsifier, emulsifier and initiator is as in Example 1.

[0069] 2) Seed polymerization: Add deionized water or soft water to the reactor, add additives, seed emulsifier, seal the reactor, replace the air in the reacto...

Embodiment 3

[0072] Special PVDC latex for kraft paper, the total weight of the copolymerization system is 200kg, and the mixed monomer accounts for 130kg;

[0073] Vinylidene chloride 106.6kg;

[0074] Acrylonitrile 20.15kg;

[0075] Butyl acrylate 2.6kg;

[0076] Acrylic acid 0.65kg;

[0077] Additives: 36g of ammonium acetate and 1.2g of ferrous chloride;

[0078] Initiator: 400g of tert-butyl hydroperoxide and 400g of sodium formaldehyde sulfoxylate;

[0079] Emulsifier: 1.6 kg of sodium secondary alkane sulfonate and 1.6 kg of sodium dodecylbenzene sulfonate;

[0080] Seed emulsifier: sodium dodecylbenzenesulfonate 140g and 2A-1 emulsifier 500g;

[0081] The specific operation process is:

[0082] 1) Preparation of raw materials: The preparation of mixed monomer, seed emulsifier, emulsifier and initiator is as in Example 1.

[0083] 2) Seed polymerization: Add deionized water or soft water to the reactor, add additives, seed emulsifier, seal the reactor, replace the air in the ...

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Abstract

The invention discloses a polyvinyl dichloride (PVDC) latex special for kraft paper used for food packaging and a preparation method thereof and application thereof. The kraft paper coated by the PVDC latex can be used for packaging of foods such as peanuts, melon seeds and walnuts. The PVDC latex is obtained by a mixed monomer, an auxiliary, an initiating agent, an emulsifying agent and a seeded emulsifying agent, wherein the mixed monomer contains a certain amount of vinylidene chloride, vinyl cyanide, butyl acrylate and acrylic acid, and the seeded emulsifying agent contains sodium dodecyl benzene sulfonate and a 2A-1 emulsifying agent. The prepared PVDC latex is good in stability and free of emulsification breaking and sediment after placed for 24 months under temperature of 30 DEG C and relative humidity (RH) of 70%. Monomer residual volume in the latex is lower. The kraft paper coated by the PVDC latex has the advantages of being environment-friendly, degradable, good in heat tightness, waterproof, damp proof and the like. When coating amount of the latex is 20g / m2, steam transit amount is less than or equal to 3g / m2.24h and oxygen permeability is less than or equal to 6g / m2.24h, monomer residual amount of the vinylidene chloride is less than or equal to 1ppm or not detected, and heating sealing intensity can reach 3N / 15mm.

Description

technical field [0001] The invention relates to a PVDC latex, in particular to a special PVDC latex for packaging kraft paper used for peanuts, melon seeds, walnuts and other foods, as well as its preparation method and application, belonging to the field of polymer materials. Background technique [0002] Plastic film is widely used in food packaging because of its good toughness, good moisture resistance, and easy to carry. However, plastic film is not degradable. In recent years, the problem of white pollution caused by discarded plastic film has become more and more serious. Due to its degradability and certain thickness and strength, kraft paper is suitable for packaging powdery materials or other granules, flakes, and block materials. Its application in packing peanuts, melon seeds and other food packaging that needs to have good moisture resistance and heat sealability is limited. [0003] In order to make kraft paper packaging materials have certain barrier properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/08C08F220/44C08F220/18C08F220/06C08F2/26D21H19/20
Inventor 方勇邢青涛
Owner HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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