Microcellular foam film-coated packaging paper material and preparation method thereof

A packaging paper and micro-foaming technology, applied in the field of materials, can solve the problems of poor gas barrier properties, poor heat resistance, poor oil resistance, etc., and achieve good foaming effect, excellent barrier properties, and good convenience

Pending Publication Date: 2019-03-19
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, PE film also faces application problems such as poor oil resistance and poor gas barrier properties (food and other products with a shelf life are easy to deteriorate); third, its heat resistance temperature does not exceed 70°C, and its heat resistance is too poor. very good solution

Method used

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  • Microcellular foam film-coated packaging paper material and preparation method thereof
  • Microcellular foam film-coated packaging paper material and preparation method thereof
  • Microcellular foam film-coated packaging paper material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Pre-mix 85 parts of polyvinyl alcohol PVA2095 and 8 parts of flow modifier PBSA in a high-speed mixer according to the parts by weight, and then put the mixture in the reactor and let it stand for 0.5 hours. Then, with 5 parts of melt reinforcing agent vinyl glycol, 0.5 part of anti-blocking agent nano-silica, 3.5 parts of endothermic chemical foaming agent sodium bicarbonate, 3 parts of foaming aid boric acid, 0.2 parts of other additives cerium stearate and 0.3 parts of antioxidant 1010 were mixed in a medium-speed mixer according to parts by weight for 2 minutes to obtain a mixture;

[0032] Step 2: Add the mixture obtained from the mixer in Step 1 into the single-screw film extruder through the hopper, and add 0.5 parts of physical foaming agent water into the extruder through the air inlet at the top of the barrel according to the number of parts by weight. At a temperature of 130-200°C, extrusion casting is carried out to form a foamed polyvinyl alcohol fi...

Embodiment 2

[0036] Step 1: Pre-mix 85 parts of polyvinyl alcohol PVA1795 and 8 parts of flow modifier EEA in a high-speed mixer according to the parts by weight, and then put the mixture in the reactor for 1 hour. Then, mix the above mixture with 5 parts of melt reinforcing agent PEG, 1 part of anti-blocking agent nano-montmorillonite, 5.2 parts of endothermic chemical foaming agent sodium carbonate, 2 parts of foaming aid stearic acid, and other additives 1.5 parts of stabilizer rare earth cerium oxide sodium sulfate and 0.5 parts of antioxidant 168 were mixed in a medium-speed mixer for 4 minutes according to parts by weight to obtain a mixture;

[0037] Step 2: Add the mixture obtained from the mixer in Step 1 into the single-screw film extruder through the hopper, and add 0.8 parts of physical foaming agent carbon dioxide into the extruder through the air inlet on the top of the barrel according to the number of parts by weight. At a temperature of 130-200°C, extrusion casting is carr...

Embodiment 3

[0041] Step 1: 80 parts of polyvinyl alcohol PVA1792 and 10 parts of flow modifier PEMA were pre-mixed in a high-speed mixer for 1.5 minutes according to parts by weight, and then the mixture was placed in a reactor and left to stand for 0.8 hours. Then, mix the above mixture with 8 parts of melt reinforcing agent PEO, 3 parts of anti-blocking agent superfine diatomite, 9 parts of endothermic chemical foaming agent sodium bicarbonate, 5 parts of foaming aid sodium hydrogen tartrate, and other additives. 0.4 part of stabilizer cerium stearate and 0.6 part of antioxidant 1010 were mixed in a medium-speed mixer for 3 minutes according to parts by weight to obtain a mixture;

[0042] Step 2: Add the mixture obtained from the mixer in Step 1 into the single-screw film extruder through the hopper, and add 1 part of the physical foaming agent nitrogen into the extruder through the air inlet at the top of the barrel according to the weight parts. At a temperature of 130-200°C, extrusi...

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Abstract

The invention relates to film-coated packaging paper and a preparation method thereof, in particular to a microcellular foam film-coated packaging paper material and a preparation method thereof. Thematerial is prepared from, by weight, 70-90 parts of polyvinyl alcohol, 1-10 parts of a melt reinforcing agent, 1-10 parts of a flow modifier, 1-10 parts of a foaming agent, 0.5-3 parts of an anti-adhesion agent, 1-5 parts of a foaming auxiliary agent and 0.5-2 parts of other auxiliary agents. The material is excellent in melt forming and stretching performance, small in foam hole diameter and high in cellular density, the foam film thickness can reach 20micron or below, and a product is light in weight, high in tensile strength and tear resistance and excellent in heat resistance and can be applied to the field of packaging with the requirement of high temperature of 80 DEG C or above; in addition, the product is environmentally friendly and biologically degradable; the product is excellent in oil substance barrier property; furthermore, due to high paper adhesiveness, a film surface aftertreatment process is avoided, and high productivity is realized.

Description

technical field [0001] The invention relates to a micro-foaming film wrapping paper material and a preparation method thereof, belonging to the field of material technology. Background technique [0002] In daily life, paper bags are becoming more and more popular because of their convenience and environmental protection. On the other hand, in order to make the packaging waterproof, people usually stick a layer of plastic film on the inner surface of the paper bag. At present, it is mainly PE film. After these products are discarded, they cannot be naturally absorbed by nature, causing a lot of current white pollution. For example, a large amount of discarded paper packaging products with inner film can be seen everywhere in various public places. On the other hand, PE film also faces application problems such as poor oil resistance and poor gas barrier properties (food and other products with a shelf life are easy to deteriorate); third, its heat resistance temperature doe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L23/08C08L67/02C08L33/10C08L77/12C08K13/02C08K13/04C08K5/053C08K3/34C08K7/26C08K3/36C08K3/22C08K5/098C08J9/12C08J9/08
CPCC08J9/0023C08J9/0061C08J9/0066C08J9/008C08J9/08C08J9/122C08J9/125C08K2003/2227C08K13/02C08K13/04C08K7/26C08K2201/011C08K5/053C08K5/098C08K3/346C08K3/36C08J2203/10C08J2203/06C08J2203/02C08J2329/04
Inventor 王滨刘曙阳蒋顶军
Owner NANJING JULONG SCI&TECH CO LTD
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