CN110964331A - Naturally biodegradable composite edible water-soluble packaging film and preparation method thereof - Google Patents
Naturally biodegradable composite edible water-soluble packaging film and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a naturally biodegradable composite edible water-soluble packaging film and a preparation method thereof, belonging to the technical field of packaging films, wherein the packaging film is prepared from natural edible substances, plant protein substances, an edible plasticizer, an edible preservative, an edible emulsifier, an edible lubricant, an edible functional additive and deionized water; the preparation method adopts a solution casting method or an extrusion film blowing process method, and the packaging film can set the temperature required for decomposing the liquid state by adjusting the change of components to prepare a normal-temperature water-soluble film and a hot-water-soluble film which achieve different functional effects; the packaging film is processed and produced into normal-temperature water-soluble film/packaging bag products and hot-water-soluble film/packaging bag products in a large scale by universal forming equipment; can be applied to the fields of beauty cosmetics, health care, daily use, medicines, foods, petroleum, chemical industry, light industry, environmental protection and pesticides, is a packaging film which is odorless, nontoxic and harmless, can be degraded and utilized by water and microorganisms in the nature and can not cause environmental pollution.
Description
Technical Field
The invention relates to a packaging film and a preparation method thereof, in particular to a natural biodegradable composite edible water-soluble packaging film and a preparation method thereof, belonging to the technical field of packaging film production.
Background
At present, plastic products made of polyethylene or polyvinyl chloride are widely applied to various industries due to low price, stable performance and convenient use. Although they bring harvest to agriculture and bring convenience to life and production, because petroleum resources are increasingly exhausted and used plastic products are abandoned and accumulated in farmlands and environments, the plastic products cannot be naturally degraded, not only can environmental pollution and soil structure damage be caused, but also some plastic food packaging bags have certain toxic effects (plastic migration) on human bodies. Although recyclable, practice proves that even paper products or completely biodegradable plastics need a certain period to return to nature, the degradation speed depends on the environmental conditions to a great extent, and the high cost is difficult to be accepted by the market for disposable packaging materials with large demands, thus being not beneficial to popularization and application.
The application of water-soluble PVA polyvinyl alcohol film in packaging is already very extensive. For example, japan, usa, france, and the like have mass-produced and sold such products. Water-soluble films are widely used by large companies in the industries of foreign pesticides, chemical engineering and the like to package products. Large companies such as the well-known companies, e.g., bayer, Henkel, Shell, and egr, eva, have started to package their products using water-soluble films. Such as clothing outlets, pesticides, fertilizers, pigments, dyes, detergents, water treatment agents, mineral additives, detergents, concrete additives, etc.;
the main application in China is not in the field of packaging, but in the two fields of embroidery and water transfer printing, and the reason is mainly the price problem. As the consumption level of China is lower compared with that of developed countries, the price of the water-soluble PVA polyvinyl alcohol film is difficult to accept in packaging. Therefore, the water-soluble PVA polyvinyl alcohol packaging film is mainly used for packaging export products;
however, in 2017, 10 and 27, the list of carcinogens published by the international cancer research institution of the world health organization is preliminarily collated for reference, and PVA polyvinyl alcohol is in the list of 3 types of carcinogens.
In the field of food technology, food packaging is a very important discipline, since the quality of packaging directly determines whether all food products and food ingredients are protected from physical contamination, oxidation reactions and spoilage by microorganisms. Although packaging made of decomposable materials has started to be popularized in various countries in recent years, at present, food packaging is still dominated by plastics of petrochemical origin, such as polyolefins, polyesters and polyamides. Since these petrochemical plastics can be produced in large quantities at low cost and have excellent properties such as excellent tensile and tear strength, good barrier properties against moisture, oxygen and aroma, heat sealability, etc. However, petrochemical plastics can hardly be decomposed in natural environment, and the damage to the environment is very severe.
Therefore, in recent years, much interest has been paid to decomposable materials, especially biopolymers, such as polysaccharides, proteins and fats. Besides biological decomposability, the biological polymer can also effectively prevent oxygen and pollutants from penetrating, and the composite package made of the biological polymer and other materials improves the performance of the packaging material and effectively prolongs the shelf life of food;
in addition, the excellent compatibility of the films made of biopolymers with many natural antimicrobial and antioxidant agents makes it possible to act as a carrier for various additives, giving the package more additional functions.
Many studies in the last decade have analyzed the feasibility of packaging made of various biopolymers from animals and plants to replace packaging made of petrochemical plastics.
However, the general mechanical strength and moisture barrier properties of biopolymers are poor compared to petrochemical plastics, which makes biopolymers rather limited as packaging. Furthermore, the moisture sensitive nature makes these film structures unstable when used to coat food products. The film made of polysaccharide and protein has extremely low oxygen penetration rate and good mechanical strength in the environment of medium and low humidity (RH <50%), however, as the biological polymer is mostly a hydrophilic substance, the film has extremely high water vapor penetration rate, and the structure is damaged in the environment of high relative humidity for a long time, so that the film cannot be used for a long time. Many researches have been made on the improvement of the properties of the film, the improvement of the affinity of the film by chemical modification and the introduction of additives
Water-based and mechanical strength is enhanced.
Biological polymers are valued primarily for their environmental friendliness and potential for use in the food and packaging industries. According to the definitions of Albertsson and Karlsson (1994), biodegradable refers to a material that under certain circumstances can pass through microorganisms to ferment with secreted products (e.g., acidic molecules) resulting in chemical disintegration; in addition, some non-biological factors such as photolysis, oxidation and hydrolysis can accelerate the rate of decomposition. Many international organizations such as ASTM and ISO have relevant specifications for setting up biodegradable materials;
the degradable packaging film/bag is a worldwide problem because of the limitations that the strength is required, the paper bag cannot be reached, and the liquid cannot be contained, and the like, the traditional PE plastic bag is really a good-quality and cheap choice, and the pollution is not brought up;
the plastic bag, in particular to the plastic bag for food, has higher requirements on strength, safety and the like, has too large degradable cost for realizing, and basically belongs to objects for amusing;
at present, degradable bags are generally customized by brand enterprises, and the degradable garbage bags can be produced, but the market acceptance is not high because the unit price of raw materials is doubled. The merchant has no luck and naturally has no degradable plastic bags on sale.
Biopolymers are available from animals and plants, such as starch, cellulose, chitosan and proteins, and these are readily available at low cost, so packages produced using these biopolymers have been known. Because of the advantages of the biological polymers suitable for making food packages, the materials can improve the safety and stability of food quality, and are sufficient to be used as novel packaging materials.
The film refers to a structurally complete thin layer structure formed by materials composed of polymers, and generally, the film is mainly made of polymers combined with other additives, and the polymers usually have a considerable degree of cohesion. Depending on the material, the polymer needs to have a certain molecular weight to generate sufficient cohesive force for film formation, and the level of cohesive force determines the density, porosity, permeability, flexibility and brittleness of the film. Natural polymers capable of forming a film are classified into lipids, proteins, and polysaccharides.
An Edible Packaging Film (EPF) is a dense-structure film which takes Edible biological macromolecular substances as a main matrix and Edible plasticizers as auxiliary materials, and enables the molecules of all film-forming agents to interact through a certain processing procedure and to form a certain mechanical property and selective permeability after drying.
The edible film is mainly used for inner packaging of food and the surface of fresh food to prevent the food from absorbing water or losing water, prevent the food from being oxidized and tainted with odor, adjust the respiration intensity of the fresh food, improve the mechanical strength of the surface of the food, improve the appearance of the food and reduce the oil absorption of fried food, and is also often used as a carrier of special ingredients (preservatives, pigments, flavor substances and the like) of the food.
At present, the research on edible films at home and abroad mainly focuses on protein and polysaccharides such as starch, cellulose, chitin, sodium alginate and the like, the research on protein films is mature, but except the research and application of starch, the polysaccharide films are mature, and the products really put into use by the rest polysaccharide films are few. Mainly because of the poor film forming property, poor water resistance, poor antibacterial property and easy cracking of the polysaccharide, the polysaccharide is difficult to adapt to mechanical packaging and long-term packaging, and has serious operation pollution or overhigh raw material cost and the like.
Along with the development and progress of society, people pay more and more attention to the environment for protecting the environment which we rely on to live, China gradually meets with internationally developed countries, the requirement on packaging environment protection is gradually improved, edible packaging films and packaging bag products which have excellent performance and can be naturally and biologically degraded are certainly and more paid more and more attention and applied by people, the edible packaging films and packaging bag products which can be naturally and biologically degraded are undoubtedly, and the edible packaging films and packaging bag products have wide market prospects in research, development and application in China.
Edible packaging products appearing in the market are endless, but the research on edible packaging materials is still in the beginning stage, and the edible packaging materials are widely pervasive due to high manufacturing cost, poor experience or other reasons and are not high in popularity. Until now, few edible packaging films have been industrially produced and commercially applied practically, and the most important reasons are insufficient mechanical strength, no heat seal property, high cost, poor experience or other reasons of the edible films, which are widely pervasive and not very popular. However, from the large global environmental protection trend, the related scientific discussion will not be stopped, and the future development value is worthy of being confirmed.
Disclosure of Invention
The edible water-soluble packaging film is green and environment-friendly, can be degraded by water and natural organisms, has excellent performance and low price, and can be widely applied to the fields of beauty cosmetics, health care, daily use, medicines, foods, petroleum, chemical industry, light industry, environmental protection, pesticides and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
a natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 0.5-40 parts of natural edible substances, 0.5-30 parts of vegetable protein substances, 0.15-6 parts of edible plasticizer, 0.1-1 part of edible preservative, 0.15-2 parts of edible emulsifier, 0.3-2 parts of edible lubricant, 0.1-0.5 part of edible functional additive and 65-85 parts of deionized water;
the natural edible substance is any two or a mixture of more of gelatin, gellan gum, arabic gum, carrageenan, low-fat pectin, agar, xanthan gum, glucomannan, acid modified starch, tamarind gum, guar gum, sodium alginate, chitosan and pullulan;
the vegetable protein substance is any one or a mixture of two of acid modified rice protein, soybean protein, peanut protein, pea protein and enzyme modified wheat gluten protein.
The edible plasticizer is any one or a mixture of two of glycerol, polyethylene glycol, acetylated mono (di) glycerol fatty acid ester, acetylated monoglyceride glycerol ethyl ester, sorbitol and mannitol;
the edible preservative is any one or a mixture of two of sodium diacetate, glycerol monocaprylate, nisin, natamycin, polylysine, chitosan, protamine, lysozyme and garlic extract;
the edible emulsifier is one or a mixture of two of sodium stearoyl lactylate, soybean phospholipid, sucrose fatty acid ester, stearic acid monoglyceride, sorbitol fatty acid ester, diacetyl tartaric acid monoglyceride, molecular distillation monoglyceride, oleic acid glyceride, citric acid fatty glyceride and polyglycerol ricinoleate;
the edible lubricant is any one or a mixture of two of corn oil, peanut oil, soybean oil, linseed oil, olive oil, coconut oil, cottonseed oil, sesame oil, rapeseed oil, liquid wax, beeswax and sodium stearate;
the edible functional additive is one or a mixture of two of calcium chloride, calcium lactate, sodium carbonate, sodium citrate, sodium chloride, lactic acid, citric acid and acetic acid.
A preparation method of a naturally biodegradable composite edible water-soluble packaging film comprises the following steps: the preparation method comprises the following steps:
(1) weighing natural edible substances, vegetable protein substances, food-grade plasticizers, food-grade preservatives, food-grade emulsifiers, food-grade lubricants, food-grade functional additives and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 150-300 r/min, and adding an edible lubricant; stirring for 1-3 minutes;
(3) cooling to 70-80 ℃, keeping the temperature constant, adding an edible emulsifier and an edible plasticizer, stirring to be fully and uniformly mixed, then adding an edible functional additive, and stirring for 1-3 minutes;
(4) adjusting the stirring speed to 300-800 r/min, slowly adding the natural edible substance and the vegetable protein substance, stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, and finally forming a uniform viscous solution;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
A preparation method of a naturally biodegradable composite edible water-soluble packaging film comprises the following steps: the preparation method comprises the following steps of:
weighing natural edible substances, vegetable protein substances, edible plasticizer, edible preservative, edible emulsifier, edible lubricant and edible functional additive according to the weight ratio, forcibly and circularly mixing → extruding granulation → melt extruding and film blowing → stretching treatment → winding → a natural biodegradable composite edible water-soluble packaging film finished product.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
The invention has the beneficial effects that:
(1) the composite edible packaging film is made of natural edible substances and vegetable protein substances, and has rich sources and high safety; is an excellent characteristic of no odor, no toxicity, no harm to human body, no pollution to food and the like, and can be eaten together with packaged food.
(2) The composite edible water-soluble packaging film does not contain mammal animal components, and does not have the hidden worry of common infectious diseases of people and livestock such as mad cow disease, foot and mouth disease and the like.
(3) The composite edible water-soluble packaging film is made of halal certification raw materials and has no religious distinction.
(4) The composite edible packaging film is ignited, and no toxic gas is released.
(5) The composite edible water-soluble packaging film is a pollution-free plastic which can be degraded and utilized by water and microorganisms in the nature, does not cause environmental pollution and is green and environment-friendly.
(6) The composite edible water-soluble packaging film can be used for preparing normal-temperature water-soluble films and hot-water-soluble films which can achieve different functional effects by adjusting the change of components and setting the temperature required for decomposing a liquid state according to actual needs;
① Water soluble film/packaging bag at room temperature is dissolved completely in room temperature water within one day, and is dissolved completely within 3 minutes after stirring;
② Hot water soluble film/packaging bag has a dissolving temperature not lower than 70 deg.C in hot water, and can be dissolved within 2 min and stirred for 2 min.
(7) The composite edible water-soluble packaging film comprises the following components: the tensile strength is 85MPa, the breaking elongation is 176-220%, the tearing force is 200-50 kg/cm2, and the high-toughness high-strength high-tear-strength high-toughness high-strength high-.
(8) The heat sealing strength of the composite edible water-soluble packaging film is more than 200g/cm2, the heat sealing property is good, and the printing is clear.
(9) The composite edible water-soluble packaging film is prepared from natural edible substances and plant protein substances, has rich sources and low price, is cheaper than polylactic acid films on the market, and has simpler and quicker degradation form.
(10) The composite edible water-soluble packaging film can be processed and produced into normal-temperature water-soluble film/packaging bag products and hot-water-soluble film/packaging bag products in a large scale by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
(11) The composite edible water-soluble packaging film has the advantages of good economy, simple production equipment and process, low cost, convenient use and the like.
Drawings
FIG. 1 shows the results of testing the properties of a naturally biodegradable, edible, water-soluble packaging film of example 10.
Detailed Description
Example 1
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 0.1 part of natural edible substance guar gum, 0.4 part of acid modified starch, 0.5 part of vegetable protein substance acid modified rice protein, 0.15 part of edible plasticizer glycerol, 0.1 part of edible preservative sodium diacetate, 0.15 part of edible emulsifier sodium stearoyl lactate, 0.3 part of edible lubricant corn oil, 0.1 part of edible functional additive citric acid and 65 parts of deionized water; (ii) a
(1) Weighing natural edible substances, vegetable protein substances, food-grade plasticizers, food-grade preservatives, food-grade emulsifiers, food-grade lubricants, food-grade functional additives and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 150r/min, and adding an edible lubricant; stirring for 1 minute;
(3) cooling to 70 ℃, keeping the temperature constant, adding the food-grade emulsifier and the food-grade plasticizer, stirring to be fully and uniformly mixed, then adding the food-grade functional additive, and stirring for 1 minute;
(4) adjusting the stirring speed to 300r/min, slowly adding the natural edible substance and the vegetable protein substance, stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, and finally forming uniform viscous solution;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 2
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: a natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 28 parts of natural edible substance Arabic gum, 12 parts of chitosan, 30 parts of vegetable protein substance soybean protein, 6 parts of edible plasticizer acetylated mono (di) glycerol fatty acid ester, 1 part of edible preservative nisin, 2 parts of edible emulsifier soybean phospholipid, 2 parts of edible lubricant sodium stearate and 0.5 part of edible functional additive sodium citrate;
the preparation method comprises the following steps of: weighing the materials in proportion → forced circulation mixing → extrusion granulation → melt extrusion blowing → stretching → winding → a finished product of the natural biodegradable composite edible water soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 3
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: a natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 6 parts of natural edible substance tamarind gum, 1 part of xanthan gum, 2 parts of vegetable protein substance acid modified rice protein, 0.8 part of edible plasticizer polyethylene glycol, 0.2 part of edible preservative nisin, 0.5 part of edible emulsifier sucrose fatty acid ester, 0.4 part of edible lubricant peanut oil, 0.15 part of edible functional additive acetic acid and 70 parts of deionized water;
a preparation method of a naturally biodegradable composite edible water-soluble packaging film comprises the following steps: the preparation method comprises the following steps:
(1) weighing natural edible substances, vegetable protein substances, food-grade plasticizers, food-grade preservatives, food-grade emulsifiers, food-grade lubricants, food-grade functional additives and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 200r/min, and adding an edible lubricant; stirring for 2 minutes;
(3) cooling to 75 ℃, keeping the temperature constant, adding the food-grade emulsifier and the food-grade plasticizer, stirring to be fully and uniformly mixed, then adding the food-grade functional additive, and stirring for 2 minutes;
(4) adjusting the stirring speed to 500 r/min, slowly adding the natural edible substance and the vegetable protein substance, and stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, so as to obtain a uniform viscous solution finally;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 4
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 28 parts of natural edible hyaluronic acid modified starch, 10 parts of guar gum, 25 parts of vegetable protein substance soybean protein, 5 parts of food grade plasticizer acetylmonoglyceride ethyl ester, 1 part of food grade preservative natamycin, 2 parts of food grade emulsifier stearic acid monoglyceride, 2 parts of food grade lubricant soybean oil and 0.45 part of food grade functional additive lactic acid;
the preparation method comprises the following steps of: weighing the materials in proportion → forced circulation mixing → extrusion granulation → melt extrusion blowing → stretching → winding → a finished product of the natural biodegradable composite edible water soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 5
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 4 parts of natural edible substance gelatin, 6 parts of pullulan, 10 parts of vegetable protein substance peanut protein, 1 part of edible plasticizer sorbitol, 0.3 part of edible preservative polylysine, 0.7 part of edible emulsifier sorbitol fatty acid ester, 0.6 part of edible lubricant coconut oil, 0.2 part of edible functional additive sodium chloride and 75 parts of deionized water;
a preparation method of a naturally biodegradable composite edible water-soluble packaging film comprises the following steps: the preparation method comprises the following steps:
(1) weighing natural edible substances, vegetable protein substances, food-grade plasticizers, food-grade preservatives, food-grade emulsifiers, food-grade lubricants, food-grade functional additives and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 250r/min, and adding an edible lubricant; stirring for 1.5 minutes;
(3) cooling to 78 deg.C, keeping constant temperature, adding food-grade emulsifier and food-grade plasticizer, stirring, adding food-grade functional additive, and stirring for 1.5 min;
(4) adjusting the stirring speed to 400 r/min, slowly adding the natural edible substance and the vegetable protein substance, stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, and finally forming uniform viscous solution;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 6
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 18 parts of natural edible substance low-fat pectin, 17 parts of xanthan gum, 18 parts of plant protein substance peanut protein, 4.5 parts of edible plasticizer acetylated mono (di) glycerol fatty acid ester, 0.9 part of edible preservative polylysine, 1.8 parts of edible emulsifier diacetyl tartaric acid monoglyceride, 1.7 parts of edible lubricant linseed oil and 0.4 part of edible functional additive calcium lactate;
the preparation method comprises the following steps of: weighing the materials in proportion → forced circulation mixing → extrusion granulation → melt extrusion blowing → stretching → winding → a finished product of the natural biodegradable composite edible water soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 7
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 10 parts of natural edible substance gelatin, 2 parts of sodium alginate, 3 parts of vegetable protein substance pea protein, 2 parts of edible plasticizer mannitol, 0.25 part of edible preservative polylysine, 0.8 part of edible emulsifier molecular distillation monoglyceride, 0.5 part of edible lubricant sesame oil, 0.18 part of edible functional additive calcium chloride and 80 parts of deionized water;
a preparation method of a naturally biodegradable composite edible water-soluble packaging film comprises the following steps: the preparation method comprises the following steps:
(1) weighing natural edible substances, an edible plasticizer, an edible preservative, an edible emulsifier, an edible lubricant, an edible functional additive and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 180r/min, and adding an edible lubricant; stirring for 2 minutes;
(3) cooling to 72 ℃, keeping the temperature constant, adding the food-grade emulsifier and the food-grade plasticizer, stirring to be fully and uniformly mixed, then adding the food-grade functional additive, and stirring for 2 minutes;
(4) adjusting the stirring speed to 400 r/min, slowly adding the natural edible substance and the vegetable protein substance, stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, and finally forming uniform viscous solution;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 8
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 18 parts of natural edible substance glucomannan, 15 parts of gellan gum, 15 parts of vegetable protein pea protein, 4.2 parts of edible plasticizer acetylmonoglyceride ethyl ester, 0.8 part of edible preservative garlic extract, 1.6 parts of edible emulsifier glyceryl oleate, 2 parts of edible lubricant olive oil and 0.37 part of edible functional additive sodium chloride;
the preparation method comprises the following steps of: weighing the materials in proportion → forced circulation mixing → extrusion granulation → melt extrusion blowing → stretching → winding → a finished product of the natural biodegradable composite edible water soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 9
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 14 parts of natural edible substance pullulan polysaccharide, 1 part of carrageenan, 5 parts of vegetable protein substance enzyme modified wheat gluten protein, 3 parts of edible plasticizer glycerol, 0.3 part of edible preservative polylysine, 1 part of edible emulsifier citric acid fatty glyceride, 0.8 part of edible lubricant cottonseed oil, 0.2 part of edible functional additive sodium carbonate and 85 parts of deionized water;
(1) weighing natural edible substances, vegetable protein substances, food-grade plasticizers, food-grade preservatives, food-grade emulsifiers, food-grade lubricants, food-grade functional additives and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 180r/min, and adding an edible lubricant; stirring for 1.5 minutes;
(3) cooling to 70 ℃, keeping the temperature constant, adding the food-grade emulsifier and the food-grade plasticizer, stirring to be fully and uniformly mixed, then adding the food-grade functional additive, and stirring for 1.5 minutes;
(4) adjusting the stirring speed to 600 r/min, slowly adding the natural edible substance and the vegetable protein substance, stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, and finally forming uniform viscous solution;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
Example 10
A natural biodegradable composite edible water-soluble packaging film is prepared from the following components in percentage by weight: 22 parts of natural edible substance carrageenan, 8 parts of agar, 10 parts of vegetable protein substance enzyme modified wheat gluten protein, 3.8 parts of edible plasticizer acetylated mono (di) glycerol fatty acid ester, 0.8 part of edible preservative nisin, 1.4 parts of edible emulsifier polyglycerol ricinoleate, 1.5 parts of edible lubricant beeswax and 0.35 part of edible functional additive sodium citrate;
the preparation method comprises the following steps of: weighing the materials in proportion → forced circulation mixing → extrusion granulation → melt extrusion blowing → stretching → winding → a finished product of the natural biodegradable composite edible water soluble packaging film.
A natural biodegradable composite edible water-soluble packaging film is produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large-scale mode by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicine, food, petroleum, chemical industry, light industry, environmental protection, pesticide and the like.
All the above examples are only for illustrating the technical solutions of the present invention and do not limit the embodiments, although the present invention is described in detail with reference to the foregoing examples, those skilled in the art should understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; the modifications, substitutions and other conceivable alternative means are within the scope of the present invention, and do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A natural biodegradable composite edible water-soluble packaging film is characterized in that: the packaging film is prepared from the following components in percentage by weight: 0.5-40 parts of natural edible substance, 0.5-30 parts of vegetable protein substance, 0.15-6 parts of edible plasticizer, 0.1-1 part of edible preservative, 0.15-2 parts of edible emulsifier, 0.3-2 parts of edible lubricant, 0.1-0.5 part of edible functional additive and 65-85 parts of deionized water.
2. The natural biodegradable composite edible water-soluble packaging film as claimed in claim 1, wherein: the natural edible substance is any two or more of gelatin, gellan gum, acacia gum, carrageenan, low-fat pectin, agar, xanthan gum, tamarind gum, guar gum, glucomannan, acid modified starch, sodium alginate, chitosan and pullulan.
3. The natural biodegradable composite edible water-soluble packaging film as claimed in claim 1, wherein: the vegetable protein substance is any one or a mixture of two of acid modified rice protein, soybean protein, peanut protein, pea protein and enzyme modified wheat gluten protein.
4. The natural biodegradable composite edible water-soluble packaging film as claimed in claim 1, wherein: the edible plasticizer is any one or a mixture of two of glycerol, polyethylene glycol, acetylated mono (di) glycerol fatty acid ester, acetylated monoglyceride, sorbitol and mannitol.
5. The natural biodegradable composite edible water-soluble packaging film as claimed in claim 1, wherein: the food grade preservative is any one or a mixture of two of sodium diacetate, glycerol monocaprylate, nisin, natamycin, polylysine, chitosan, protamine, lysozyme and garlic extract.
6. The natural biodegradable composite edible water-soluble packaging film as claimed in claim 1, wherein: the edible emulsifier is one or a mixture of two of sodium stearoyl lactylate, soybean phospholipid, sucrose fatty acid ester, stearic acid monoglyceride, sorbitol fatty acid ester, diacetyl tartaric acid monoglyceride, molecular distillation monoglyceride, oleic acid glyceride, citric acid fatty acid glyceride and polyglycerol ricinoleate.
7. The natural biodegradable composite edible water-soluble packaging film as claimed in claim 1, wherein: the edible lubricant is any one or a mixture of two of corn oil, peanut oil, soybean oil, linseed oil, olive oil, coconut oil, cottonseed oil, sesame oil, rapeseed oil, liquid wax, beeswax and sodium stearate.
8. The natural biodegradable polysaccharide composite edible water-soluble packaging film as claimed in claim 1, wherein: the edible functional additive is one or a mixture of two of calcium chloride, calcium lactate, sodium carbonate, sodium citrate, sodium chloride, lactic acid, citric acid and acetic acid.
9. A preparation method of a naturally biodegradable composite edible water-soluble packaging film is characterized by comprising the following steps: the preparation method adopts a solution casting method to prepare: the method comprises the following steps:
(1) weighing natural edible substances, vegetable protein substances, food-grade plasticizers, food-grade preservatives, food-grade emulsifiers, food-grade lubricants, food-grade functional additives and deionized water according to the weight part ratio;
(2) adding deionized water into a sealed reaction kettle, heating to 100 ℃, starting stirring at the rotating speed of 150-300 r/min, and adding an edible lubricant; stirring for 1-3 minutes;
(3) cooling to 70-80 ℃, keeping the temperature constant, adding an edible emulsifier and an edible plasticizer, stirring to be fully and uniformly mixed, then adding an edible functional additive, and stirring for 1-3 minutes;
(4) adjusting the stirring speed to 300-800 r/min, slowly adding the natural edible substance and the vegetable protein substance, stirring for 20 min until the natural edible substance and the vegetable protein substance are completely dissolved, and finally forming a uniform viscous solution;
(5) standing and naturally cooling to room temperature, and adding an edible preservative;
(6) degassing for 5 minutes under the vacuum degree of 0.095MPa, and removing residual gas;
(7) coating the mixture on solution casting equipment → drying → peeling → stretching → coiling → a finished product of a naturally biodegradable composite edible water-soluble packaging film.
10. A preparation method of a naturally biodegradable composite edible water-soluble packaging film is characterized by comprising the following steps: the preparation method adopts an extrusion film blowing process method, and comprises the following steps:
weighing natural edible substances, vegetable protein substances, edible plasticizer, edible preservative, edible emulsifier, edible lubricant and edible functional additive according to the weight ratio, forcibly and circularly mixing → extruding granulation → melt extruding and film blowing → stretching treatment → winding → a natural biodegradable composite edible water-soluble packaging film finished product.
11. The natural biodegradable composite edible water-soluble packaging film and the preparation method thereof according to claims 1 to 10, wherein the natural biodegradable composite edible water-soluble packaging film is characterized in that: the packaging film is processed and produced into normal-temperature water-soluble packaging bag products and hot-water-soluble packaging bag products in a large scale by adopting general forming equipment; can be widely applied to the fields of beauty cosmetics, health care, daily use, medicines, foods, petroleum, chemical industry, light industry, environmental protection and pesticides.
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