Water-soluble food packaging film

Abstract

The invention discloses a water-soluble food packaging film. The water-soluble food packaging film is prepared from, by weight, 10 to 50 parts of polyvinyl alcohol, 30 to 80 parts of oxidized starch, 0.5 to 5 parts of a filling material, 1 to 10 parts of a plasticizer, 0.5 to 10 parts of a modifier, 0.5 to 10 parts of metallocene, 3 to 10 parts of linear polyethylene, and 0.1 to 2 parts of a food colouring. The water-soluble food packaging film can be degraded quickly after using, is capable of reducing stress on the environment, and according with requirements of construction of resource-conserving and environment-friendly society; a preparation method is simple; raw materials are cheap; and the water-soluble food packaging film is convenient for large-scale popularization and application.

Description

technical field

[0001] The invention belongs to the technical field of chemical industry, in particular to a water-soluble food packaging film. Background technique

[0002] The output of my country's plastic film accounts for about 20% of the total output of plastic products, and it is one of the fastest growing categories of plastic products. As the demand for plastic film in my country's packaging, agriculture and other fields is not only increasing, it is estimated that the demand for plastic film in my country will increase at a rate of more than 9% every year, and its market prospect is very broad.

[0003] Among the plastic packaging materials, the market demand for film materials has increased the most, accounting for about 46% of the total plastic packaging materials. Plastic packaging films mainly include: heat shrinkable packaging film, wrapping packaging film, food aseptic packaging film, fruit and vegetable fresh-keeping film, liquid packaging film, etc. With ...

Examples

Embodiment 1

[0023] The following components are calculated by weight ratio: 10 parts of polyvinyl alcohol (polymerization degree: 5000), 30 parts of oxidized starch, 0.5 parts of wood flour, 1 part of dioctyl phthalate, 0.5 parts of CPE, 1.5 parts of metal, 4 parts of linear polyethylene and 0.2 parts of titanium dioxide.

[0024] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:

[0025] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 100°C, dissolve the material completely, and obtain the mixed solution;

[0026] (2) Put the mixed solution at 100°C for 1 hour, pour it into a flat-flow mold preheated to 100°C, and cast it onto a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and then peeled off from the steel plate. Water-soluble food packaging film.

Embodiment 2

[0028] The following components are calculated by weight ratio: 50 parts of polyvinyl alcohol (polymerization degree: 10000), 80 parts of oxidized starch, 5 parts of diatomaceous earth, 10 parts of dibutyl phthalate, 5 parts of MBS, 8 parts of metallocene 1 part, 8 parts of linear polyethylene and 1 part of zinc oxide.

[0029] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:

[0030] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 150°C, dissolve the material completely, and obtain the mixed solution;

[0031] (2) Put the mixed solution at 130°C for 2 hours, pour it into a flat-flow mold preheated to 100°C, and cast it on a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and then peeled off from the steel plate to obtain Water-soluble food packagi...

Embodiment 3

[0033] The following components are calculated by weight ratio: 30 parts of polyvinyl alcohol (polymerization degree: 8000), 50 parts of oxidized starch, 1.5 parts of asbestos, 3 parts of diisodecyl phthalate, 2 parts of ABS, and 3 parts of metallocene , 5 parts of linear polyethylene and 0.5 parts of lithopone.

[0034] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:

[0035] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 120°C, dissolve the material completely, and obtain the mixed solution;

[0036] (2) Let the mixed solution stand at 125°C for 1.5h, pour it into a flat-flow mold preheated to 95°C, and cast it on a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and peeled off from the steel plate to make Water-soluble food packaging film.

technical field

[0001] The invention belongs to the technical field of chemical industry, in particular to a water-soluble food packaging film. Background technique

[0002] The output of my country's plastic film accounts for about 20% of the total output of plastic products, and it is one of the fastest growing categories of plastic products. As the demand for plastic film in my country's packaging, agriculture and other fields is not only increasing, it is estimated that the demand for plastic film in my country will increase at a rate of more than 9% every year, and its market prospect is very broad.

[0003] Among the plastic packaging materials, the market demand for film materials has increased the most, accounting for about 46% of the total plastic packaging materials. Plastic packaging films mainly include: heat shrinkable packaging film, wrapping packaging film, food aseptic packaging film, fruit and vegetable fresh-keeping film, liquid packaging film, etc. With ...

Examples

Embodiment 1

[0023] The following components are calculated by weight ratio: 10 parts of polyvinyl alcohol (polymerization degree: 5000), 30 parts of oxidized starch, 0.5 parts of wood flour, 1 part of dioctyl phthalate, 0.5 parts of CPE, 1.5 parts of metal, 4 parts of linear polyethylene and 0.2 parts of titanium dioxide.

[0024] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:

[0025] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 100°C, dissolve the material completely, and obtain the mixed solution;

[0026] (2) Put the mixed solution at 100°C for 1 hour, pour it into a flat-flow mold preheated to 100°C, and cast it onto a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and then peeled off from the steel plate. Water-soluble food packaging film.

Embodiment 2

[0028] The following components are calculated by weight ratio: 50 parts of polyvinyl alcohol (polymerization degree: 10000), 80 parts of oxidized starch, 5 parts of diatomaceous earth, 10 parts of dibutyl phthalate, 5 parts of MBS, 8 parts of metallocene 1 part, 8 parts of linear polyethylene and 1 part of zinc oxide.

[0029] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:

[0030] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 150°C, dissolve the material completely, and obtain the mixed solution;

[0031] (2) Put the mixed solution at 130°C for 2 hours, pour it into a flat-flow mold preheated to 100°C, and cast it on a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and then peeled off from the steel plate to obtain Water-soluble food packagi...

Embodiment 3

[0033] The following components are calculated by weight ratio: 30 parts of polyvinyl alcohol (polymerization degree: 8000), 50 parts of oxidized starch, 1.5 parts of asbestos, 3 parts of diisodecyl phthalate, 2 parts of ABS, and 3 parts of metallocene , 5 parts of linear polyethylene and 0.5 parts of lithopone.

[0034] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:

[0035] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 120°C, dissolve the material completely, and obtain the mixed solution;

[0036] (2) Let the mixed solution stand at 125°C for 1.5h, pour it into a flat-flow mold preheated to 95°C, and cast it on a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and peeled off from the steel plate to make Water-soluble food packaging film.