CN111777869A - Wear-resistant plastic food packaging bag and processing technology thereof - Google Patents
Wear-resistant plastic food packaging bag and processing technology thereof Download PDFInfo
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Abstract
The invention discloses a wear-resistant plastic food packaging bag and a processing technology thereof, wherein the wear-resistant plastic food packaging bag is prepared from the following raw materials in parts by weight: 70-100 parts of paper pulp, 40-50 parts of organic silicon modified polyester resin, 2-8 parts of sodium silicate, 2-9 parts of glass fiber, 4-16 parts of potassium hypochlorite, 60-90 parts of iron powder, 12-18 parts of sol, 60-70 parts of polylactic acid, 7-15 parts of nano calcium carbonate, 1.5-2 parts of antistatic agent, 5-15 parts of polypropylene resin, 1.4-2.3 parts of toughening reinforcing agent composition, 0.2-0.5 part of anti-adhesive agent, 6-8 parts of bacteriostatic additive and 0.1-0.3 part of defoaming agent. Has the advantages that: the plastic food packaging bag disclosed by the invention has good tensile strength, good elongation at break and good gas barrier property, and gas in the air is difficult to enter the packaging bag in a sealed state, so that the plastic food packaging bag has good barrier property. Has excellent wear-resisting effect, can prolong the service life of the plastic packaging bag and has low production cost.
Description
Technical Field
The invention relates to the technical field of food packaging bag processing and preparation, in particular to a wear-resistant plastic food packaging bag and a processing technology thereof.
Background
Plastic food packaging bags are a necessity in daily life, and as is well known, consumers and markets have developed a hard demand for consumption of plastic packaging bags, and the consumption has become a habit, and the plastic packaging bags are integrated into the lives of people. In daily life, plastic packaging bags are increasingly becoming the first choice for packaging products due to their light weight and convenient use. In developing countries, the number of the shopping malls is steadily increasing due to the commercialization process, so that the plastic packaging bag industry is driven to be further prosperous, and the two show high correlation. The global plastic packaging bag industry generally shows a steadily increasing development trend, and particularly, the demand of developing countries for plastic packaging bags still shows a rapid increase trend, so that the continuous growth and the prosperity of the plastic packaging bag industry are promoted.
Most of existing plastic bags are made of simple materials and are very easy to damage in use, and due to the fact that the plastic bags are made of various additive components, food cannot be stored well, influence on human health is avoided, and the plastic bags are quite inconvenient to use.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention aims to provide a wear-resistant plastic food packaging bag and a processing technology thereof, and aims to solve the problems of the wear-resistant plastic food packaging bag and the processing technology thereof in the background technology.
In order to achieve the above objects, according to one aspect of the present invention, there is provided a wear-resistant plastic food packaging bag and a process for manufacturing the same.
The wear-resistant plastic food packaging bag is prepared from the following raw materials in parts by weight:
70-100 parts of paper pulp, 40-50 parts of organic silicon modified polyester resin, 2-8 parts of sodium silicate, 2-9 parts of glass fiber, 4-16 parts of potassium hypochlorite, 60-90 parts of iron powder, 12-18 parts of sol, 60-70 parts of polylactic acid, 7-15 parts of nano calcium carbonate, 1.5-2 parts of antistatic agent, 5-15 parts of polypropylene resin, 1.4-2.3 parts of toughening reinforcing agent composition, 0.2-0.5 part of anti-adhesive agent, 6-8 parts of bacteriostatic additive and 0.1-0.3 part of defoaming agent.
Further, the toughening reinforcing agent composition comprises the following raw material components: 0.7-1.3 parts of thermoplastic polyolefin elastomer graft and 0.7-1 part of polyolefin.
Further, the bacteriostatic additive comprises the following raw material components: 0.4-1.2 parts of nano silver carbon molecular sieve, 1.6-2.4 parts of nano zinc oxide, 2.5-2.7 parts of dodecyl glucoside and 1.5-1.7 parts of hydrogen peroxide.
According to another aspect of the present invention, a method of making a wear resistant plastic food packaging bag is provided.
Weighing the raw materials required by the wear-resistant plastic food packaging bag according to the parts by weight;
putting paper pulp, organic silicon modified polyester resin, sodium silicate, glass fiber, potassium hypochlorite, iron powder, sol, polylactic acid, nano calcium carbonate and polypropylene resin into a reaction kettle, adding a proper amount of water, stirring and mixing, and stopping stirring after uniform mixing to obtain a mixed material I;
putting the weighed toughening reinforcing agent, the antistatic agent and the anti-adhesive agent into a first stirring machine, and stirring and mixing at normal temperature to obtain a mixed material II;
putting the nano silver-carbon molecular sieve and the nano zinc oxide into a container, uniformly mixing, adding the dodecyl glucoside and the hydrogen peroxide, stirring for 1 hour, filtering, taking out, washing for 1-4 times by using distilled water, and drying to obtain the antibacterial additive;
putting the second mixed material and the antibacterial additive into a reaction kettle, respectively and fully stirring and mixing the materials with the first mixed material, then adding a defoaming agent, stirring again, closing the high-speed mixer, and cooling to 45 ℃ to obtain a third mixed material;
granulating the blend at 180 ℃ to obtain master batches, and finally adding the master batches into a film blowing machine, wherein the film blowing temperature is 140 ℃, and blowing out the plastic film;
and then cooling the plastic film, cutting the plastic film after cooling to form a bag body, and respectively carrying out heat sealing and edge sealing on the bottom and two sides of the bag body after cutting, thereby obtaining the wear-resistant plastic food packaging bag.
Furthermore, the stirring speed in the stirring and mixing process is 300-150r/min, and the stirring time is 20-25 min.
Further, the heat sealing temperature of the bag body is 220-280 ℃, and the heat sealing time is 40-55 s.
The invention adopts the following raw materials in parts:
pulp: the paper pulp is a fibrous substance prepared by using plant fibers as raw materials through different processing methods. Mechanical pulp, chemical pulp and chemimechanical pulp can be classified according to the processing method; the fiber raw materials can also be divided into wood pulp, straw pulp, hemp pulp, reed pulp, cane pulp, bamboo pulp, rag pulp and the like according to the used fiber raw materials. And can be divided into refined pulp, bleached pulp, unbleached pulp, high-yield pulp, semi-chemical pulp and the like according to different purities.
Silicone modified polyester resin: has excellent electrical insulation, volume resistivity of 10' } i3-cm, dielectric strength of snkmmm and good heat resistance. The curing temperature is low (iso r3v ia has good dipping and drying properties, and the paint film is uniform and compact and has good moisture resistance.
Sodium silicate: the sodium silicate is a water-soluble silicate, and the water solution is water glass, and is an ore binder. The chemical formula is R2O. nSiO2, wherein R2O is alkali metal oxide, and n is the ratio of the mole number of silicon dioxide and the mole number of the alkali metal oxide, and is called the mole number of the water glass. The water glass commonly used in construction is an aqueous solution of sodium silicate.
Glass fiber: the material is an inorganic non-metallic material with excellent performance, has various varieties, has the advantages of good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, but has the defects of brittleness and poor wear resistance. The hair-care fiber is made of six kinds of ores of pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite through the processes of high-temperature melting, wire drawing, winding, weaving and the like, wherein the diameter of each monofilament ranges from several micrometers to twenty micrometers, the monofilament is equivalent to 1/20-1/5 of one hair, and each bundle of fiber precursor consists of hundreds of even thousands of monofilaments.
Potassium hypochlorite: (KClO) inorganic compound, strong oxidant, white powder and strong chlorine odor. The solution was a yellow-green translucent liquid. It is extremely unstable in air and rapidly decomposes after being heated. Is very soluble in cold water and can be decomposed when meeting hot water. It is mainly used as oxidant, bleaching agent, disinfectant and bactericide.
Iron powder: the color is black. Is the main raw material of powder metallurgy. It is customarily divided into five grades, i.e. coarse powder, medium powder, fine powder, micro powder and ultra-fine powder according to the particle size. The iron powder consisting of particles with the particle size of 150-500 mu m is coarse powder, the particles with the particle size of 44-150 mu m are medium powder, the particles with the particle size of 10-44 mu m are fine powder, the particles with the particle size of 0.5-10 mu m are superfine powder, and the particles with the particle size of less than 0.5 mu m are superfine powder. The powder which can pass through a standard sieve with 325 meshes, namely, the powder with the particle size of less than 44 mu m is generally called sub-sieve powder, and if the sieving is carried out with higher precision, only airflow classification equipment can be used, but for some iron powder which is easy to oxidize, only a JZDF nitrogen protective classifier can be used for the sieving.
Sol: sols fall into the category of colloidal chemistry, which is the science of studying dispersions of these fine particles (colloidal particles), in a narrow sense, and generally specifies colloidal particles with a diameter of 1-100nm (also between 1 and 1000nm are claimed). And dispersing dispersed phase particles having a diameter of 1 to 100nm in a dispersion medium, and having a distinct physical interface between the dispersed phase particles and the dispersion medium, is called a colloidal dispersion system. The sol is a multiphase dispersion system, is insoluble in a medium, has an obvious phase interface, and is lyophobic colloid.
Polylactic acid: polylactic acid is a polymer obtained by polymerizing lactic acid serving as a main raw material, and the raw material is sufficient in source and can be regenerated. The production process of polylactic acid is pollution-free, and the product can be biodegraded, so that the polylactic acid can be recycled in nature, and is an ideal green high polymer material.
Nano-grade calcium carbonate: has more special properties than the common calcium carbonate. Therefore, the nano calcium carbonate is a functional inorganic filler, not only has the functions of increasing the volume of the product and reducing the cost of the product, but also has excellent reinforcing performance.
Antistatic agent: antistatic agents are additives that are added to plastics or applied to the surface of molded articles to reduce static buildup. Antistatic agents can be classified into two major types, internal type and external type, depending on the method of use, and the main type used for plastics is internal type antistatic agent. They can also be classified into two broad categories, temporary and permanent, according to the nature of the antistatic agent.
Polypropylene resin: the thermoplastic resin is a crystalline polymer with a regular structure, is light milky granular material, is tasteless, nontoxic and light. The relative density is 0.90-0.91, which is the lightest of the general-purpose resins. The mechanical property is good, the heat resistance is good, the melting point is about 170 ℃, the deformation is not generated at 150 ℃ under the action of no external force, the chemical stability is good, the acid, alkali and organic solvent are resistant, the reaction with most chemicals (such as fuming nitric acid, chromic acid solution, halogen, benzene, carbon tetrachloride, chloroform and the like) does not occur, and the water absorption is hardly generated. Polypropylene has the disadvantages of easy aging, brittleness at low temperature and poor low-temperature impact strength, but can be improved by adding additives, blending or copolymerization and the like.
Defoaming agent: also known as antifoams, are food additives that reduce surface tension, inhibit foam generation or eliminate foam already generated during food processing. The defoaming agent permitted in China comprises 7 types of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether, polydimethylsiloxane and the like.
Nano silver carbon molecular sieve: the carbon molecular sieve with a pore structure is compounded with nano-silver and other materials of about 25 nanometers to form a novel filtering material of the nano-silver carbon molecular sieve, when water flows through the novel filtering material, the carbon molecular sieve with the pore structure quickly contacts and adsorbs bacteria, viruses, chlorine dioxide and the like in water to the pore channel of the carbon molecular sieve, and the nano-silver is compounded in the pore channel of the carbon molecular sieve to kill the bacteria, viruses, chlorine dioxide and the like and is periodically discharged from a backwashing channel, so that the product is ensured to have a continuous purification effect.
Nano zinc oxide: the inorganic material is a high-end high-functional fine inorganic product, shows a plurality of special properties such as non-migration property, fluorescence property, piezoelectric property, ultraviolet ray absorption and scattering ability and the like, and can be used for manufacturing gas sensors, fluorescent bodies, varistors, ultraviolet ray shielding materials, image recording materials, piezoelectric materials, piezoresistors, high-efficiency catalysts, magnetic materials, plastic films and the like by utilizing the wonderful performance of the inorganic material in the aspects of light, electricity, magnetism, sensitivity and the like.
Dodecyl glucoside: is a colorless transparent liquid, is easy to dissolve in water and common organic solvents, and has applications in various aspects.
Hydrogen peroxide: the appearance is colorless transparent liquid, and the water solution is a strong oxidant suitable for medical wound disinfection, environmental disinfection and food disinfection. Generally, it will decompose into water and oxygen, but the decomposition rate is extremely slow, and the reaction speed is accelerated by adding manganese dioxide as catalyst or irradiating with short wave radiation.
Thermoplastic polyolefin elastomer graft: is a high-performance polyolefin product, has rubber elasticity at normal temperature, and has the characteristics of small density, large bending, high low-temperature impact resistance, easy processing, repeated use and the like.
Polyolefin: a polymer of a hydrocarbon. And a generic name of thermoplastic resins obtained by polymerizing or copolymerizing an α -olefin such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene and the like, and a certain cyclic olefin alone.
Compared with the prior art, the invention has the following beneficial effects:
(1) the plastic food packaging bag disclosed by the invention has good tensile strength, good elongation at break and good gas barrier property, and gas in the air is difficult to enter the packaging bag in a sealed state, so that the plastic food packaging bag has good barrier property. Has excellent wear-resisting effect, can prolong the service life of the plastic packaging bag and has low production cost.
(2) The packaging bag prepared by the invention has the advantages of durability and easy oxidative degradation; the preparation method is simple, easy to implement and convenient to master; the antistatic coating has good strength and toughness, has a good antistatic effect by adding the antistatic agent, has a good anti-adhesion effect by adding the anti-blocking agent, and has a good use effect.
(3) The invention can kill common bacteria, fungi and other microorganisms and prevent the microorganisms from infecting food by adding the bacteriostatic additive, and the iron powder is added, and the reduced iron powder has the function of absorbing oxygen, can reduce the oxygen content in the packaging bag and inhibit the growth of the microorganisms, and has the synergistic effect with the bacteriostatic additive, so the packaging bag is used for packaging food, can better store the food and prolong the shelf life of the food.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flow chart of a processing process of a wear-resistant plastic food packaging bag according to an embodiment of the invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description:
referring to fig. 1, a wear-resistant plastic food packaging bag and a processing process thereof are provided.
The wear-resistant plastic food packaging bag is prepared from the following raw materials in parts by weight:
70-100 parts of paper pulp, 40-50 parts of organic silicon modified polyester resin, 2-8 parts of sodium silicate, 2-9 parts of glass fiber, 4-16 parts of potassium hypochlorite, 60-90 parts of iron powder, 12-18 parts of sol, 60-70 parts of polylactic acid, 7-15 parts of nano calcium carbonate, 1.5-2 parts of antistatic agent, 5-15 parts of polypropylene resin, 1.4-2.3 parts of toughening reinforcing agent composition, 0.2-0.5 part of anti-adhesive agent, 6-8 parts of bacteriostatic additive and 0.1-0.3 part of defoaming agent.
Wherein the toughening reinforcing agent comprises the following raw material components: the toughening reinforcing agent composition comprises the following raw material components: 0.7-1.3 parts of thermoplastic polyolefin elastomer graft and 0.7-1 part of polyolefin.
The bacteriostatic additive comprises the following raw material components: 0.4-1.2 parts of nano silver carbon molecular sieve, 1.6-2.4 parts of nano zinc oxide, 2.5-2.7 parts of dodecyl glucoside and 1.5-1.7 parts of hydrogen peroxide.
In order to clearly understand the technical scheme of the invention, the technical scheme of the invention is described in detail through specific examples.
Example one
A wear-resistant plastic food packaging bag is prepared from the following raw materials in parts by weight:
70 g of paper pulp, 40 g of organic silicon modified polyester resin, 2 g of sodium silicate, 2 g of glass fiber, 4 g of potassium hypochlorite, 60 g of iron powder, 12 g of sol, 60 g of polylactic acid, 7 g of nano calcium carbonate, 1.5 g of antistatic agent, 5 g of polypropylene resin, 1.4 g of toughening reinforcing agent composition, 0.2 g of anti-bonding agent, 6 g of antibacterial additive and 0.1 g of defoaming agent.
The toughening reinforcing agent composition comprises the following raw material components: 0.7 g of thermoplastic polyolefin elastomer graft and 0.7 g of polyolefin.
The bacteriostatic additive comprises the following raw material components: 0.4 g of nano silver carbon molecular sieve, 1.6 g of nano zinc oxide, 2.5 g of dodecyl glucoside and 1.5 g of hydrogen peroxide.
The preparation method of the wear-resistant plastic food packaging bag comprises the following steps:
weighing the raw materials required by the wear-resistant plastic food packaging bag according to the parts by weight;
putting 70 g of paper pulp, 40 g of organic silicon modified polyester resin, 2 g of sodium silicate, 2 g of glass fiber, 4 g of potassium hypochlorite, 60 g of iron powder, 12 g of sol, 60 g of polylactic acid, 7 g of nano calcium carbonate and 5 g of polypropylene resin into a reaction kettle, adding a proper amount of water, stirring and mixing, and stopping stirring after uniform mixing to obtain a mixed material I;
putting 1.4 g of the weighed toughening reinforcing agent composition, 1.5 g of the antistatic agent and 0.2 g of the anti-adhesion agent into a first stirring machine, and stirring and mixing at normal temperature to obtain a second mixed material;
putting 0.4 g of nano silver carbon molecular sieve and 1.6 g of nano zinc oxide into a container, uniformly mixing, adding 2.5 g of dodecyl glucoside and 1.5 g of hydrogen peroxide, stirring for 1 hour, filtering, taking out, washing for 1-4 times by using distilled water, and drying to obtain 6 g of the antibacterial additive;
putting the second mixed material and 6 g of the antibacterial additive into a reaction kettle, respectively and fully stirring and mixing the second mixed material and the first mixed material, then adding 0.1 g of defoaming agent, stirring again, closing the high-speed mixer, and cooling to 45 ℃ to obtain a third mixed material;
granulating the blend at 180 ℃ to obtain master batches, and finally adding the master batches into a film blowing machine, wherein the film blowing temperature is 140 ℃, and blowing out the plastic film;
and then cooling the plastic film, cutting the plastic film after cooling to form a bag body, and respectively carrying out heat sealing and edge sealing on the bottom and two sides of the bag body after cutting, thereby obtaining the wear-resistant plastic food packaging bag.
Example two
A wear-resistant plastic food packaging bag is prepared from the following raw materials in parts by weight:
85 g of paper pulp, 45 g of organic silicon modified polyester resin, 5 g of sodium silicate, 5.5 g of glass fiber, 10 g of potassium hypochlorite, 75 g of iron powder, 15 g of sol, 65 g of polylactic acid, 11 g of nano calcium carbonate, 1.7 g of antistatic agent, 10 g of polypropylene resin, 1.8 g of toughening reinforcing agent composition, 0.3 g of anti-bonding agent, 7 g of bacteriostatic additive and 0.2 g of defoaming agent.
The toughening reinforcing agent composition comprises the following raw material components: 1.0 g of thermoplastic polyolefin elastomer graft and 0.8 g of polyolefin.
The bacteriostatic additive comprises the following raw material components: 0.7 g of nano silver carbon molecular sieve, 2.0 g of nano zinc oxide, 1.6 g of dodecyl glucoside and 1.6 g of hydrogen peroxide.
The preparation method of the wear-resistant plastic food packaging bag comprises the following steps:
weighing the raw materials required by the wear-resistant plastic food packaging bag according to the parts by weight;
putting 85 g of paper pulp, 45 g of organic silicon modified polyester resin, 5 g of sodium silicate, 5.5 g of glass fiber, 10 g of potassium hypochlorite, 75 g of iron powder, 15 g of sol, 65 g of polylactic acid, 11 g of nano calcium carbonate and 10 g of polypropylene resin into a reaction kettle, adding a proper amount of water, stirring and mixing, and stopping stirring after uniform mixing to obtain a mixed material I;
putting 1.8 g of the weighed toughening reinforcing agent composition, 1.7 g of the antistatic agent and 0.3 g of the anti-adhesion agent into a first stirring machine, and stirring and mixing at normal temperature to obtain a second mixed material;
putting 0.7 g of nano silver carbon molecular sieve and 2.0 g of nano zinc oxide into a container, uniformly mixing, adding 1.6 g of dodecyl glucoside and 1.5 g of hydrogen peroxide, stirring for 1 hour, filtering, taking out, washing for 1-4 times by using distilled water, and drying to obtain 7 g of the antibacterial additive;
putting the second mixed material and 7 g of the antibacterial additive into a reaction kettle, respectively and fully stirring and mixing the second mixed material and the first mixed material, then adding 0.2 g of defoaming agent, stirring again, closing the high-speed mixer, and cooling to 45 ℃ to obtain a third mixed material;
granulating the blend at 180 ℃ to obtain master batches, and finally adding the master batches into a film blowing machine, wherein the film blowing temperature is 140 ℃, and blowing out the plastic film;
and then cooling the plastic film, cutting the plastic film after cooling to form a bag body, and respectively carrying out heat sealing and edge sealing on the bottom and two sides of the bag body after cutting, thereby obtaining the wear-resistant plastic food packaging bag.
EXAMPLE III
A wear-resistant plastic food packaging bag is prepared from the following raw materials in parts by weight:
100 g of paper pulp, 50 g of organic silicon modified polyester resin, 8 g of sodium silicate, 9 g of glass fiber, 16 g of potassium hypochlorite, 90 g of iron powder, 18 g of sol, 70 g of polylactic acid, 15 g of nano calcium carbonate, 2 g of antistatic agent, 15 g of polypropylene resin, 2.3 g of toughening reinforcing agent composition, 0.5 g of anti-adhesive agent, 8 g of antibacterial additive and 0.3 g of defoaming agent.
The toughening reinforcing agent composition comprises the following raw material components: 1.3 grams of thermoplastic polyolefin elastomer graft, 1.0 gram of polyolefin.
The bacteriostatic additive comprises the following raw material components: 1.2 g of nano silver carbon molecular sieve, 2.4 g of nano zinc oxide, 2.7 g of dodecyl glucoside and 1.7 g of hydrogen peroxide.
The preparation method of the wear-resistant plastic food packaging bag comprises the following steps:
weighing the raw materials required by the wear-resistant plastic food packaging bag according to the parts by weight;
putting 100 g of paper pulp, 50 g of organic silicon modified polyester resin, 8 g of sodium silicate, 9 g of glass fiber, 16 g of potassium hypochlorite, 90 g of iron powder, 18 g of sol, 70 g of polylactic acid, 15 g of nano calcium carbonate and 15 g of polypropylene resin into a reaction kettle, adding a proper amount of water, stirring and mixing, and stopping stirring after uniform mixing to obtain a mixed material I;
2.3 g of the weighed toughening reinforcing agent composition, 2 g of the antistatic agent and 0.5 g of the anti-bonding agent are put into a first stirring machine, and are stirred and mixed under the condition of normal temperature to obtain a second mixed material;
putting 1.2 g of nano silver carbon molecular sieve and 2.4 g of nano zinc oxide into a container, uniformly mixing, adding 2.7 g of dodecyl glucoside and 1.7 g of hydrogen peroxide, stirring for 1 hour, filtering, taking out, washing for 1-4 times by using distilled water, and drying to obtain 8 g of the antibacterial additive;
putting the second mixed material and 8 g of the antibacterial additive into a reaction kettle, respectively and fully stirring and mixing the second mixed material and the first mixed material, then adding 0.3 g of defoaming agent, stirring again, closing the high-speed mixer, and cooling to 45 ℃ to obtain a third mixed material;
granulating the blend at 180 ℃ to obtain master batches, and finally adding the master batches into a film blowing machine, wherein the film blowing temperature is 140 ℃, and blowing out the plastic film;
and then cooling the plastic film, cutting the plastic film after cooling to form a bag body, and respectively carrying out heat sealing and edge sealing on the bottom and two sides of the bag body after cutting, thereby obtaining the wear-resistant plastic food packaging bag.
For the convenience of understanding the above technical solution of the present invention, the following detailed description is made on the flow of the above solution of the present invention with reference to the accompanying drawings, and specifically is as follows:
according to embodiments of the present invention, wear resistant plastic food packaging bags are also provided.
As shown in fig. 1, in the actual production process, the preparation of the wear-resistant plastic food packaging bag comprises the following steps:
s101, weighing all raw materials required by the wear-resistant plastic food packaging bag according to the parts by weight;
step S103, putting paper pulp, organic silicon modified polyester resin, sodium silicate, glass fiber, potassium hypochlorite, iron powder, sol, polylactic acid, nano calcium carbonate and polypropylene resin into a reaction kettle, adding a proper amount of water, stirring and mixing, and stopping stirring after uniform mixing to obtain a mixed material I;
s105, putting the weighed toughening reinforcing agent, the antistatic agent and the anti-adhesive agent into a first stirring machine, and stirring and mixing at normal temperature to obtain a second mixed material;
step S107, putting the nano silver-carbon molecular sieve and the nano zinc oxide into a container, uniformly mixing, adding dodecyl glucoside and hydrogen peroxide, stirring for 1 hour, filtering, taking out, washing for 1-4 times by using distilled water, and drying to obtain the antibacterial additive;
step S109, putting the second mixed material and the bacteriostatic additive into a reaction kettle, respectively and fully stirring and mixing the materials with the first mixed material, then adding a defoaming agent, stirring again, closing the high-speed mixer, and cooling to 45 ℃ to obtain a third mixed material;
step S111, granulating the blend at 180 ℃ to obtain master batches, and finally adding the master batches into a film blowing machine, wherein the film blowing temperature is 140 ℃, and blowing out the plastic film;
and S113, cooling the plastic film, cutting the plastic film after cooling to form a bag body, and performing heat sealing and edge sealing on the bottom and two sides of the bag body respectively after cutting to obtain the wear-resistant plastic food packaging bag.
In one embodiment, the stirring speed in the stirring and mixing is 300-150r/min, and the stirring time is 20-25 min.
In one embodiment, the heat sealing temperature of the bag body is 220-280 ℃, and the heat sealing time is 40-55 s.
In conclusion, by means of the technical scheme, the wear-resistant plastic food packaging bag is obtained, and has the advantages of good tensile strength, good elongation at break and good gas barrier property, and gas in the air is difficult to enter the packaging bag in a sealed state, so that the plastic food packaging bag has good barrier property. Has excellent wear-resisting effect, can prolong the service life of the plastic packaging bag and has low production cost. The packaging bag prepared by the invention has the advantages of durability and easy oxidative degradation; the preparation method is simple, easy to implement and convenient to master; the antistatic coating has good strength and toughness, has a good antistatic effect by adding the antistatic agent, has a good anti-adhesion effect by adding the anti-blocking agent, and has a good use effect. The invention can kill common bacteria, fungi and other microorganisms and prevent the microorganisms from infecting food by adding the bacteriostatic additive, and the iron powder is added, and the reduced iron powder has the function of absorbing oxygen, can reduce the oxygen content in the packaging bag and inhibit the growth of the microorganisms, and has the synergistic effect with the bacteriostatic additive, so the packaging bag is used for packaging food, can better store the food and prolong the shelf life of the food.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The wear-resistant plastic food packaging bag is characterized by being prepared from the following raw materials in parts by weight:
70-100 parts of paper pulp, 40-50 parts of organic silicon modified polyester resin, 2-8 parts of sodium silicate, 2-9 parts of glass fiber, 4-16 parts of potassium hypochlorite, 60-90 parts of iron powder, 12-18 parts of sol, 60-70 parts of polylactic acid, 7-15 parts of nano calcium carbonate, 1.5-2 parts of antistatic agent, 5-15 parts of polypropylene resin, 1.4-2.3 parts of toughening reinforcing agent composition, 0.2-0.5 part of anti-adhesive agent, 6-8 parts of bacteriostatic additive and 0.1-0.3 part of defoaming agent.
2. The wear-resistant plastic food packaging bag and the processing technology thereof as claimed in claim 1, wherein the toughening and reinforcing agent composition comprises the following raw material components: 0.7-1.3 parts of thermoplastic polyolefin elastomer graft and 0.7-1 part of polyolefin.
3. The wear-resistant plastic food packaging bag and the processing technology thereof as claimed in claim 1, wherein the bacteriostatic additive comprises the following raw material components: 0.4-1.2 parts of nano silver carbon molecular sieve, 1.6-2.4 parts of nano zinc oxide, 2.5-2.7 parts of dodecyl glucoside and 1.5-1.7 parts of hydrogen peroxide.
4. A process for manufacturing a wear-resistant plastic food packaging bag according to claim 3, comprising the following steps:
weighing the raw materials required by the wear-resistant plastic food packaging bag according to the parts by weight;
putting paper pulp, organic silicon modified polyester resin, sodium silicate, glass fiber, potassium hypochlorite, iron powder, sol, polylactic acid, nano calcium carbonate and polypropylene resin into a reaction kettle, adding a proper amount of water, stirring and mixing, and stopping stirring after uniform mixing to obtain a mixed material I;
putting the weighed toughening reinforcing agent, the antistatic agent and the anti-adhesive agent into a first stirring machine, and stirring and mixing at normal temperature to obtain a mixed material II;
putting the nano silver-carbon molecular sieve and the nano zinc oxide into a container, uniformly mixing, adding the dodecyl glucoside and the hydrogen peroxide, stirring for 1 hour, filtering, taking out, washing for 1-4 times by using distilled water, and drying to obtain the antibacterial additive;
putting the second mixed material and the antibacterial additive into a reaction kettle, respectively and fully stirring and mixing the materials with the first mixed material, then adding a defoaming agent, stirring again, closing the high-speed mixer, and cooling to 45 ℃ to obtain a third mixed material;
granulating the blend at 180 ℃ to obtain master batches, and finally adding the master batches into a film blowing machine, wherein the film blowing temperature is 140 ℃, and blowing out the plastic film;
and then cooling the plastic film, cutting the plastic film after cooling to form a bag body, and respectively carrying out heat sealing and edge sealing on the bottom and two sides of the bag body after cutting, thereby obtaining the wear-resistant plastic food packaging bag.
5. The wear-resistant plastic food packaging bag and the processing technology thereof as claimed in claim 4, wherein the stirring speed in the stirring and mixing is 300-150r/min, and the stirring time is 20-25 min.
6. The wear-resistant plastic food packaging bag and the processing technology thereof as claimed in claim 5, wherein the heat sealing temperature of the bag body is 220-280 ℃, and the heat sealing time is 40-55 s.
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