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Preparation method of polyvinyl alcohol wrapping film

A polyvinyl alcohol and wrapping film technology, applied in the field of packaging materials, can solve the problems of poor viscosity, low tensile strength and elongation at break, etc., and achieve the effects of increased adhesion, improved mechanical properties, and dense surface structure

Active Publication Date: 2018-08-17
上海十条实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a polyvinyl alcohol stretch film in view of the problems that the stretch film currently on the market is slightly less viscous due to the influence of temperature, and the tensile strength and elongation at break are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A kind of preparation method of polyvinyl alcohol stretch film, this preparation method comprises the steps:

[0026] (1) Heat the rosin ester to 140~160°C, melt for 4~5 minutes, lower the temperature to 60~70°C, add an emulsifier with 3~5% mass of rosin ester, stir evenly, pour the same mass of rosin ester In water at 60-70°C, stir at 800-900r / min for 15-20min, homogenize twice through a high-pressure homogenizing pump, cool to room temperature, filter through a 200-mesh sieve to obtain an emulsion, and set aside;

[0027] (2) In parts by weight, take 10~13 parts of acetone, 7~8 parts of titanium dioxide, 2~3 parts of silane coupling agent, 1~2 parts of titanate coupling agent, and mix silane coupling agent, titanic acid Mix the ester coupling agent and acetone, stir evenly, add titanium dioxide, stir for 8-10min, ultrasonic for 0.8-1h, dry at 70-80°C for 20-24h, grind, pass through a 200-300 mesh sieve to obtain the sieved product ;

[0028] (3) Grind the green tea,...

Embodiment 1

[0033] The emulsifier is alkylphenol ethoxylate.

[0034] The silane coupling agent is γ-aminopropyltriethoxysilane.

[0035] The titanate coupling agent is isopropyl tris(isostearyl) titanate.

[0036] The composite agent is obtained by mixing ammonium polyphosphate and pentaerythritol in a mass ratio of 20:9.

[0037] A kind of preparation method of polyvinyl alcohol stretch film, this preparation method comprises the steps:

[0038] (1) Heat the rosin ester to 140°C, melt for 4 minutes, lower the temperature to 60°C, add an emulsifier with 3% mass of the rosin ester, stir evenly, pour the same mass of rosin ester into water at a temperature of 60°C, and heat at 800r / min and stir for 15 minutes, homogenize twice through a high-pressure homogenizing pump, wait to cool to room temperature, filter with a 200-mesh sieve to obtain an emulsion, and set aside;

[0039] (2) In parts by weight, take 10 parts of acetone, 7 parts of titanium dioxide, 2 parts of silane coupling agen...

Embodiment 2

[0045] The emulsifier is alkylphenol ethoxylate.

[0046] The silane coupling agent is γ-aminopropyltriethoxysilane.

[0047] The titanate coupling agent is isopropyl tris(isostearyl) titanate.

[0048] The composite agent is obtained by mixing ammonium polyphosphate and pentaerythritol in a mass ratio of 20:9.

[0049] A kind of preparation method of polyvinyl alcohol stretch film, this preparation method comprises the steps:

[0050] (1) Heat the rosin ester to 160°C, melt for 5 minutes, lower the temperature to 70°C, add an emulsifier with 5% mass of the rosin ester, stir evenly, pour the same mass of rosin ester into water at a temperature of 70°C, and use 900r / min and stir for 20 minutes, homogenize twice through a high-pressure homogenizing pump, cool to room temperature, filter through a 200-mesh sieve to obtain an emulsion, and set aside;

[0051] (2) In parts by weight, take 13 parts of acetone, 8 parts of titanium dioxide, 3 parts of silane coupling agent, and 2 ...

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Abstract

The invention discloses a preparation method of a polyvinyl alcohol wrapping film, and belongs to the field of packaging materials. The preparation method includes the steps: heating and melting rosinester, adding emulsifying agents, pouring mixture into water to stir the mixture, performing homogeneity on the mixture by a high-pressure homogeneous pump, and filtering the mixture to obtain filterliquid for standby application; mixing silane coupling agents, titanate coupling agents and acetone, adding titanium dioxide, and performing stirring, ultrasonic treatment, drying, grinding and sieving; grinding green tea leaves, placing the grinded green tea leaves into a polytetrafluoroethylene digestion tank, adding distilled water, placing the digestion tank into a microwave digestion instrument to perform extraction, mixing, soaking and filtering sieved objects and extraction liquid to obtain filter residue, and drying the filter residues to dried objects; uniformly stirring polyvinyl alcohol, distilled water, glutaraldehyde and sieved materials to obtain mixture; extruding the mixture by a double-screw extruder at high temperature, conveying the extruded mixture into a tape castingmachine to cast into a film, and packing the film to obtain the polyvinyl alcohol wrapping film.

Description

technical field [0001] The invention belongs to the field of packaging materials, and in particular relates to a preparation method of a polyvinyl alcohol stretch film. Background technique [0002] Packaging materials refer to the materials used to make packaging containers, packaging decoration, packaging printing, packaging and transportation to meet product packaging requirements, including metal, plastic, glass, ceramics, paper, bamboo, wild mushrooms, natural fibers, Main packaging materials such as chemical fibers and composite materials, as well as auxiliary materials such as strapping, decoration, and printing materials. Stretch film, also known as "stretch film", has excellent tensile strength, puncture resistance and tear resistance, and is widely used in packaging and bundling applications such as chemical products, electronic product boxes, ceramic products, and electromechanical equipment. Widely used in foreign trade export, cans, food and beverage, printing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L93/04C08K13/06C08K9/04C08K9/06C08K3/22C08K9/12C08K5/00C08K3/32C08K5/053C08J5/18
CPCC08J5/18C08J2329/04C08J2493/04C08K2003/2241C08K2003/323
Inventor 董发勇徐扣华刘红妹
Owner 上海十条实业有限公司
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