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Modifier applied to polyvinylidene chloride and preparation method thereof

A polyvinylidene chloride and modifying agent technology, which is applied in the field of food packaging, can solve problems such as heat resistance, film-forming yellowing, and poor adhesion, and achieve increased polymerization stability, increased water resistance, increased fluidity and Effect of film-forming mechanical properties

Active Publication Date: 2017-12-26
南京扬乾生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the application of polyvinylidene chloride in the food industry, its inherent defects are gradually highlighted, such as emulsion viscosity, foaming, unevenness, heat resistance, yellowing of film formation, poor adhesion, film thickness Unequal; therefore modified polyvinylidene chloride synthesis modification or emulsion modification has become a hot research topic at home and abroad

Method used

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  • Modifier applied to polyvinylidene chloride and preparation method thereof
  • Modifier applied to polyvinylidene chloride and preparation method thereof
  • Modifier applied to polyvinylidene chloride and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0021] Such as figure 1 Shown, the present invention also provides a kind of preparation method that is applied to the modifying agent of polyvinylidene chloride, specifically comprises the following steps:

[0022] a. Mixing of component 1: Mix beeswax and Span-80 for 5-30 minutes in a water bath at 75-90°C with a rotation speed of 10r / min-200r / min;

[0023] b. Mixing of component two: Add Tween-80 to water at 75-90°C, and then add nano-SiO 2 , stirring and mixing for 10-20min at a temperature of 75-90°C and a rotational speed of 1000-5000r / min;

[0024] c. Synthesis of modifier: Stir the mixed component 1 and component 2 at a temperature of 75-85°C and a rotation speed of 1000-3000r / min for 1-5min;

[0025] d. Modified polyvinylidene chloride: Stir the synthesized modifier and polyvinylidene chloride at a temperature of 45-65°C and a rotation speed of 1000-3000r / min for 20-30min.

Embodiment 1

[0026] Embodiment 1: the influence of beeswax on the effect of modified polyvinylidene chloride

[0027] Use different proportions of beeswax to synthesize modifiers and modify polyvinylidene chloride. According to the formula design in Table 1, mix the beeswax and Span-80 in component 1 for 15 minutes under the condition of 86°C water bath and the speed of 100r / min. ; Add Tween-80 in component two to water at 85°C, and then add nano-SiO 2 , at 85°C, 3000r / min stirring and mixing for 15min; the mixed component 1 and component 2 were stirred at 80°C and 2000r / min for 3min to obtain the synthesized modifier; then the synthesized modifier was mixed with the polymer Vinylidene chloride at 50°C, stirred at 2000r / min for 25min. The viscosity of polyvinylidene chloride in different formulations, film-forming moisture permeability and film-forming mechanical properties were analyzed.

[0028] Table 1 Modifier processing formula

[0029] .

[0030] Experimental results:

[0031]...

Embodiment 2

[0034] Example 2: Nano-SiO 2 Influence on the Effect of Polyvinylidene Chloride Modifier

[0035] Synthesize modifiers with different proportions of beeswax and modify polyvinylidene chloride. According to the formula design in Table 3, mix the beeswax and Span-80 in component 1 for 15 minutes under the condition of water bath at 86°C and the speed of 100r / min ; Add Tween-80 in component two to water at 85°C, and then add nano-SiO 2 , at 85°C, 3000r / min stirring and mixing for 15min; the mixed component 1 and component 2 were stirred at 80°C and 2000r / min for 3min to obtain the synthesized modifier; then the synthesized modifier was mixed with the polymer Vinylidene chloride at 50°C, stirred at 2000r / min for 25min. The viscosity of polyvinylidene chloride in different formulations, film-forming moisture permeability and film-forming mechanical properties were analyzed.

[0036] Table 3 Processing formula of different modifiers

[0037] .

[0038] Experimental results: ...

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Abstract

The invention discloses a modifier applied to polyvinylidene chloride. The modifier comprises a first component, a second component and a third component. The first component comprises 0.5-1.5% of beeswax and 0.5-1.5% of span-80; the second component comprises 0.5-1.5% of tween-80, 30-60% of water and 0.15-0.3% of nanometer SiO2; the third component comprises 30-60% of polyvinylidene chloride emulsion. Owing to the mode, the modifier applied to the polyvinylidene chloride and a method for preparing the modifier have the advantages that raw materials with different characteristics are uniformly mixed with one another according to oil and water emulsification principles, then polyvinylidene chloride solution is modified, and the viscosity of the polyvinylidene chloride emulsion can be lowered by the aid of modification processes; the mechanical properties of polyvinylidene chloride films can be improved; the moisture barrier properties of the polyvinylidene chloride films can be improved, and the modifier and the method can be widely applied to the fields of food packaging, coating, paint films and the like.

Description

technical field [0001] The invention belongs to the technical field of food packaging, and in particular relates to a modifier applied to polyvinylidene chloride and a preparation method thereof. Background technique [0002] Polyvinylidene chloride is a copolymer formed of vinylidene chloride and vinyl chloride. It is a non-toxic, odorless, safe and reliable high-barrier packaging material, and its high-barrier performance does not change with changes in the temperature and humidity of the external environment. . Due to its high barrier properties, vinylidene chloride is widely used in packaging meat products, snack foods, tea and other foods. With the application of polyvinylidene chloride in the food industry, its inherent defects are gradually highlighted, such as emulsion viscosity, foaming, unevenness, heat resistance, yellowing of film formation, poor adhesion, film thickness Unequal; therefore, the synthetic modification or emulsion modification of modified polyvin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/08C08L91/06C08L71/02C08K3/36
CPCC08K2201/011C08L27/08C08L2203/16C08L2205/03C08L91/06C08L71/02C08K3/36
Inventor 章建浩梁艳文赵见营
Owner 南京扬乾生物科技有限公司