At present, there are a wide range of edible packaging resources developed at home and abroad, and there are ten prospects for research and development.
Polysaccharides Edible Packaging Films Edible packaging based on plant polysaccharides or animal polysaccharides mainly includes starch films, modified cellulose films, animal and vegetable adhesive films, and chitosan films.
The starch edible packaging film is the earliest type of research and development in edible packaging films. In recent years, significant progress has been made in the research and application of film-forming materials and processes and plasticizers. The starch edible packaging film is mainly composed of starch, mainly amylose, polyols (such as glycerin, sorbitol, glycerol derivatives, and polyethylene glycol) and lipids (such as fatty acids, monoglyceride, surfactants, etc.) ) For plasticizers, small amounts of animal or vegetable gums are made as enhancers. They have the characteristics of stretchability, transparency, folding resistance, good water insolubility and low air permeability.
Modified Cellulose Edible Packaging Films In recent years, research and development of modified cellulose edible packaging films have received great attention in various countries in the world. Chemically modified with plant fibers, such as methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose and other materials, stearic acid, palmitic acid, beeswax and agar Plasticizers and reinforcing agents to produce translucent, soft, smooth, ready-to-feed edible packaging films. It has higher tensile strength, less moisture permeability and breathability, and is used in many foods to block water, oxygen and grease.
Animal or vegetable glue edible packaging film Japan has been in the world leading level in the development and application of animal and vegetable glue edible packaging film, and other countries have also studied. This type of edible film is based on animal glues such as gelatin, bone glue, shellac, vegetable gums such as glucomannan, carrageenan, pectin, sodium alginate, pullulan, etc. Glycerin, polyol, sorbate Such as plasticizers, made of edible packaging film. It has the characteristics of transparency, high strength, good printability, heat-sealing, gas-barrier, and water-resistant and moisture-resistant. It has been used in the packaging of condiments, sweeteners, soups, oils, and other foods. It can also be used in frozen foods. , candy and preserved fruit, etc. to prevent adhesion.
Chitosan edible packaging film developed by the United States successfully. Chitosan is an extract of shellfish such as shrimp, crab, and insects. The combination of chitosan and lauric acid can produce a uniform edible film with a thickness of only 012-013 mm and good transparency. It is mainly used for fresh packaging of fruits (peeled) and vegetables.
Protein Edible Packaging Membrane The protein-based edible membranes are mainly in bean protein film, wheat protein film, corn gluten film, whey protein film.
The soy protein edible packaging film uses soy protein powder as a base, and glycerin, sorbitol, etc. are plasticizers, and can be made into various edible edible packaging films or coatings. It has good strength, elasticity, moisture resistance and other characteristics, can maintain moisture, prevent oxygen from entering, and has high nutritional value.
The wheat protein edible packaging film is based on wheat gluten protein. After the extraction of ethanol, glycerin, ammonia, etc. are used as plasticizers to make edible packaging films. Its toughness is relatively strong, translucent, and it has a good ability to block oxygen and carbon dioxide, but it has poor moisture and moisture resistance.
Corn protein edible packaging film Japan and China have achieved similar results in the research and development of zein edible packaging films. The protein in corn is used as a matrix, extracted with a solution of ethylene glycol or isopropyl alcohol, and glycerin, propylene glycol or acetyl glycerin is used as a plasticizer to make an edible packaging film. It has the characteristics of fast film formation, stable storage under high temperature and high humidity, reliable safety, and excellent oxygen and carbon dioxide insulation and moisture resistance. It can be used as an edible packaging film and coating for medicines and sugar products, as well as a coating for fresh eggs and a coating agent for microcapsules. The United States found that the protein in the corn cob (corn mash) was refined into a thin film, and fatty acids were used as plasticizers to make edible packaging. It also has the characteristics of zein edible packaging film.
Whey Protein Edible Wraps Whey protein has only been used as an edible packaging film matrix material in recent years. Various whey protein edible packaging films made from whey protein as raw materials, glycerin, sorbitol, beeswax, CMC, etc. are characterized by water permeability, low oxygen permeability, high strength, and good transparency.
Microbial Copolymer Polyester Edible Packaging The current microbial copolyester edible packaging film has been researched and developed by the United Kingdom and the United States as products, and has received the attention of researchers from various countries. Such membranes are natural edible molasses, fats and oils as raw materials, 32 hydroxy butyl esters, 32 hydroxyvaleric acid, 42 hydroxybutyl esters, caprolactones and the like produced by microbial fermentation are made into edible packaging films through polyester. It has the characteristics of good optical performance, transparency, gloss, excellent physical properties, light weight, low density, stable chemical properties, easy forming and extensive substitution.
The research and application of compound edible packaging film with polysaccharide, protein and fatty acid compound edible packaging film is the current development trend. With different proportions of polysaccharides, proteins, fatty acids combined together to create an edible packaging film. Due to the different types and contents of polysaccharides and proteins in the composite film, the transparency, mechanical strength, printability, heat-sealability, gas-barrier property, and water- and moisture-resistance of the film, it can meet the needs of different food packaging. The larger the fatty acid molecule, the better the water retention. It can be used for inner packaging of preserved fruit, cakes, instant noodle soup and other convenience foods.
China's papermaking chemicals development hotspot industry insiders analyzed that in the future China's papermaking chemicals industry will focus on the development of supporting chemicals for grass pulp and chemicals needed for fiber regeneration, and will gradually develop and apply chemicals for neutral sizing agents.
China's paper industry uses non-wood fiber as the main raw material, and non-wood pulp fibers reach 60. Due to the large number of grass fibers with short fibers and poor strength, the quality of paper and paperboard products has been greatly affected. Therefore, the structure of paper-making chemicals that are used to produce high-grade paper and other paper products in combination with plants and trees will shift to paper pulp chemical structures mainly composed of straw pulp or full straw pulp for the production of high-grade paper and other paper products. The emphasis is on series of straw chemical additives such as enhancers, brighteners, and sizing agents.
Due to the lack of domestic wood fibre resources, the recycling of fibres has gradually received attention. China has introduced several sets of equipment that uses imported waste paper to make high-grade paper, and uses imported waste paper to recycle pulping equipment. The industry believes that it should vigorously organize the production of its supporting waste paper deinking agent, especially the flotation deinking agent. In addition, the research, development, application, and promotion of chemicals such as enhancers and sizing agents for the production of high-grade paper from recycled paper should be well done.
According to the international trend of the paper industry shifting from acidic sizing to neutral sizing, companies should develop and produce neutral sizing agents and their various types of chemicals. Due to the abundant resources of rosin in China, the development of emulsion rosin and near-neutral emulsion rosin sizing agent is still the main task at this stage. Therefore, in the future, the neutral sizing agent should gradually develop.
Industry insiders suggested that in the coming years, it is necessary to focus on the development of retention aids, filter aids, reinforcing agents, and sizing agents. The main varieties include modified starch, neutral sizing agents AKD, SR, wet enhancer WS21, and rosin emulsions. Chemicals compatible with the oxygen bleaching process include ethylenediamine acetic acid (EDTA) and diethylenetriamine pentaacetic acid (DTPA).
Polysaccharides Edible Packaging Films Edible packaging based on plant polysaccharides or animal polysaccharides mainly includes starch films, modified cellulose films, animal and vegetable adhesive films, and chitosan films.
The starch edible packaging film is the earliest type of research and development in edible packaging films. In recent years, significant progress has been made in the research and application of film-forming materials and processes and plasticizers. The starch edible packaging film is mainly composed of starch, mainly amylose, polyols (such as glycerin, sorbitol, glycerol derivatives, and polyethylene glycol) and lipids (such as fatty acids, monoglyceride, surfactants, etc.) ) For plasticizers, small amounts of animal or vegetable gums are made as enhancers. They have the characteristics of stretchability, transparency, folding resistance, good water insolubility and low air permeability.
Modified Cellulose Edible Packaging Films In recent years, research and development of modified cellulose edible packaging films have received great attention in various countries in the world. Chemically modified with plant fibers, such as methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose and other materials, stearic acid, palmitic acid, beeswax and agar Plasticizers and reinforcing agents to produce translucent, soft, smooth, ready-to-feed edible packaging films. It has higher tensile strength, less moisture permeability and breathability, and is used in many foods to block water, oxygen and grease.
Animal or vegetable glue edible packaging film Japan has been in the world leading level in the development and application of animal and vegetable glue edible packaging film, and other countries have also studied. This type of edible film is based on animal glues such as gelatin, bone glue, shellac, vegetable gums such as glucomannan, carrageenan, pectin, sodium alginate, pullulan, etc. Glycerin, polyol, sorbate Such as plasticizers, made of edible packaging film. It has the characteristics of transparency, high strength, good printability, heat-sealing, gas-barrier, and water-resistant and moisture-resistant. It has been used in the packaging of condiments, sweeteners, soups, oils, and other foods. It can also be used in frozen foods. , candy and preserved fruit, etc. to prevent adhesion.
Chitosan edible packaging film developed by the United States successfully. Chitosan is an extract of shellfish such as shrimp, crab, and insects. The combination of chitosan and lauric acid can produce a uniform edible film with a thickness of only 012-013 mm and good transparency. It is mainly used for fresh packaging of fruits (peeled) and vegetables.
Protein Edible Packaging Membrane The protein-based edible membranes are mainly in bean protein film, wheat protein film, corn gluten film, whey protein film.
The soy protein edible packaging film uses soy protein powder as a base, and glycerin, sorbitol, etc. are plasticizers, and can be made into various edible edible packaging films or coatings. It has good strength, elasticity, moisture resistance and other characteristics, can maintain moisture, prevent oxygen from entering, and has high nutritional value.
The wheat protein edible packaging film is based on wheat gluten protein. After the extraction of ethanol, glycerin, ammonia, etc. are used as plasticizers to make edible packaging films. Its toughness is relatively strong, translucent, and it has a good ability to block oxygen and carbon dioxide, but it has poor moisture and moisture resistance.
Corn protein edible packaging film Japan and China have achieved similar results in the research and development of zein edible packaging films. The protein in corn is used as a matrix, extracted with a solution of ethylene glycol or isopropyl alcohol, and glycerin, propylene glycol or acetyl glycerin is used as a plasticizer to make an edible packaging film. It has the characteristics of fast film formation, stable storage under high temperature and high humidity, reliable safety, and excellent oxygen and carbon dioxide insulation and moisture resistance. It can be used as an edible packaging film and coating for medicines and sugar products, as well as a coating for fresh eggs and a coating agent for microcapsules. The United States found that the protein in the corn cob (corn mash) was refined into a thin film, and fatty acids were used as plasticizers to make edible packaging. It also has the characteristics of zein edible packaging film.
Whey Protein Edible Wraps Whey protein has only been used as an edible packaging film matrix material in recent years. Various whey protein edible packaging films made from whey protein as raw materials, glycerin, sorbitol, beeswax, CMC, etc. are characterized by water permeability, low oxygen permeability, high strength, and good transparency.
Microbial Copolymer Polyester Edible Packaging The current microbial copolyester edible packaging film has been researched and developed by the United Kingdom and the United States as products, and has received the attention of researchers from various countries. Such membranes are natural edible molasses, fats and oils as raw materials, 32 hydroxy butyl esters, 32 hydroxyvaleric acid, 42 hydroxybutyl esters, caprolactones and the like produced by microbial fermentation are made into edible packaging films through polyester. It has the characteristics of good optical performance, transparency, gloss, excellent physical properties, light weight, low density, stable chemical properties, easy forming and extensive substitution.
The research and application of compound edible packaging film with polysaccharide, protein and fatty acid compound edible packaging film is the current development trend. With different proportions of polysaccharides, proteins, fatty acids combined together to create an edible packaging film. Due to the different types and contents of polysaccharides and proteins in the composite film, the transparency, mechanical strength, printability, heat-sealability, gas-barrier property, and water- and moisture-resistance of the film, it can meet the needs of different food packaging. The larger the fatty acid molecule, the better the water retention. It can be used for inner packaging of preserved fruit, cakes, instant noodle soup and other convenience foods.
China's papermaking chemicals development hotspot industry insiders analyzed that in the future China's papermaking chemicals industry will focus on the development of supporting chemicals for grass pulp and chemicals needed for fiber regeneration, and will gradually develop and apply chemicals for neutral sizing agents.
China's paper industry uses non-wood fiber as the main raw material, and non-wood pulp fibers reach 60. Due to the large number of grass fibers with short fibers and poor strength, the quality of paper and paperboard products has been greatly affected. Therefore, the structure of paper-making chemicals that are used to produce high-grade paper and other paper products in combination with plants and trees will shift to paper pulp chemical structures mainly composed of straw pulp or full straw pulp for the production of high-grade paper and other paper products. The emphasis is on series of straw chemical additives such as enhancers, brighteners, and sizing agents.
Due to the lack of domestic wood fibre resources, the recycling of fibres has gradually received attention. China has introduced several sets of equipment that uses imported waste paper to make high-grade paper, and uses imported waste paper to recycle pulping equipment. The industry believes that it should vigorously organize the production of its supporting waste paper deinking agent, especially the flotation deinking agent. In addition, the research, development, application, and promotion of chemicals such as enhancers and sizing agents for the production of high-grade paper from recycled paper should be well done.
According to the international trend of the paper industry shifting from acidic sizing to neutral sizing, companies should develop and produce neutral sizing agents and their various types of chemicals. Due to the abundant resources of rosin in China, the development of emulsion rosin and near-neutral emulsion rosin sizing agent is still the main task at this stage. Therefore, in the future, the neutral sizing agent should gradually develop.
Industry insiders suggested that in the coming years, it is necessary to focus on the development of retention aids, filter aids, reinforcing agents, and sizing agents. The main varieties include modified starch, neutral sizing agents AKD, SR, wet enhancer WS21, and rosin emulsions. Chemicals compatible with the oxygen bleaching process include ethylenediamine acetic acid (EDTA) and diethylenetriamine pentaacetic acid (DTPA).
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