Dustproof oxygen-permeable deoxidizer package material and production process thereof

Abstract

The application belongs to the technical field of deoxidizers, and particularly relates to a dustproof oxygen-permeable deoxidizer package material and a production process thereof. In view of the problems of low strength, easy tearing and deformation, and poor powder leakage prevention performance of existing deoxidizers, the dustproof oxygen-permeable deoxidizer package material comprises a breathable framework layer, a dustproof film adhered to the upper surface of the breathable framework layer, and an inner film adhered to the lower surface of the breathable framework layer. The raw material composition and content of the breathable framework layer include 15-25 parts of ultra-thin non-woven fabric, 70-80 parts of paper pulp, 1-5 parts of modified corn starch, 1-5 parts of organic glass glue, 0.50-1.00 parts of cellulose, and 0.10-0.50 parts of iron hydroxide. The dustproof oxygen-permeable deoxidizer package material can effectively prevent dust and permeate oxygen. The material characteristics of the breathable framework layer can enhance the strength of the dustproof oxygen-permeable deoxidizer package material, improve the tensile resistance, prevent the dustproof oxygen-permeable deoxidizer package material from tearing and deforming, and greatly improve the deformation resistance and powder leakage prevention performance.

Description

Technical Field

[0001] This invention relates to the field of deoxidizer technology, and in particular to a dustproof and oxygen-permeable deoxidizer packaging material and its manufacturing process. Background Technology

[0002] Chinese patent application number 201911177719.1 discloses a dustproof and oxygen-permeable deoxidizer packaging material and its manufacturing process, comprising a polyethylene co-extruded layer, a dustproof paper layer, and a polyester film layer; adhesive layers are provided between the polyethylene co-extruded layer and the dustproof paper layer, and between the dustproof paper layer and the polyester film layer; the adhesive weight in each adhesive layer is 3-5 g / m², and the adhesive coverage on both sides of the dustproof paper layer is 50-60% respectively; breathable pores are provided on both the polyethylene co-extruded layer and the polyester film layer. This dustproof and oxygen-permeable deoxidizer packaging material has the advantages of good dustproof and breathable effects.

[0003] However, there are also some problems with the dustproof, oxygen-permeable, and deoxidizing agent packaging material and its production process. For example, although the packaging material has good air permeability, its overall strength is low in actual use, making it prone to tearing and deformation, and its anti-leakage performance is also difficult to guarantee. Summary of the Invention

[0004] Based on the problems of low strength, easy tearing and deformation, and poor powder leakage prevention in the background technology, this invention proposes a dustproof and oxygen-permeable deoxidizer packaging material and its production process.

[0005] The present invention proposes a dustproof and oxygen-permeable deoxidizer packaging material, which includes an air-permeable skeleton layer, a dustproof film bonded to the upper surface of the air-permeable skeleton layer, and an inner film bonded to the lower surface of the air-permeable skeleton layer. The raw material composition and content of the breathable skeleton layer, by mass parts, include 15 to 25 parts of ultra-thin non-woven fabric, 70 to 80 parts of pulp, 1 to 5 parts of modified corn starch, 1 to 5 parts of plexiglass adhesive, 0.50 to 1.00 parts of cellulose, and 0.10 to 0.50 parts of ferric hydroxide. The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of breathable skeleton layer, dustproof film and inner film, which can effectively play the function of dustproof and oxygen permeable. In addition, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented, and the deformation resistance and powder leakage prevention performance can be greatly improved.

[0006] Preferably, the preparation method of the ultrathin nonwoven fabric is as follows: polyvinyl alcohol is melt-purified and then made into polyvinyl alcohol fibers by centrifugal spinning. The polyvinyl alcohol fibers are then combed into a thin cotton web of uniform thickness by physical opening. The primary cotton web is then pressed longitudinally and transversely to form a preliminary shape in one pressing. Next, the web is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed a second time. The drying temperature is 160℃-190℃ to obtain the finished ultrathin nonwoven fabric, which can enhance the material properties.

[0007] Preferably, the method for preparing the pulp liquor is as follows: Plant wood flour is obtained, methanol is added to the plant wood flour, and the cellulose in the plant wood flour is dissolved using methanol. After solid-liquid separation, a cellulose dissolution solution is obtained. The cellulose dissolution solution is heated, and the methanol is evaporated using heat to obtain a cellulose paste. The cellulose paste is dehydrated, and the remaining methanol in the evaporated cellulose paste is dried. Water is added to prepare a fiber pulp. The water content of the obtained fiber pulp is adjusted to 50wt%–70wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp. The mixture is heated to 50℃–70℃ to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:(2–3):(8–12). The mixture is heated to 80℃–95℃ to carry out an esterification reaction to obtain the pulp liquor, which can improve the performance of the pulp liquor.

[0008] Preferably, the modified corn starch comprises, by mass, 95% corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase and 1% hexose oxidase, wherein the metal ions are selected from calcium ions, copper ions and magnesium ions, which can modify the corn starch.

[0009] Preferably, the method for preparing the modified corn starch is as follows: corn starch is obtained, 10 times the amount of deionized water is added to the corn starch, and the mixture is prepared into a starch emulsion. Metal ions are added to the starch emulsion, and the starch emulsion after adding metal ions is subjected to pulsed electric field treatment. The pulse field strength is 10KV / cm to 30KV / cm, the pulse width is 20μs to 40μs, and the pulse treatment time is 10ms. After pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis to inactivate the enzymes. Then, hexose oxidase is added to perform lactone reaction on the oligodextrin in the starch emulsion to inactivate the enzymes. After air drying, the modified corn starch is obtained, which can ensure the modification effect.

[0010] Preferably, the inner membrane is a CPP membrane with a thickness of 20µm to 25µm, which can isolate the deoxidizer.

[0011] Preferably, the dustproof film is made of polyethylene (PE) film or polyethylene terephthalate (PET) film, with a thickness of 0.012 mm, a density of 1.4, and a unit area weight of 35 g / m², which can provide dust protection.

[0012] A manufacturing process for a dustproof, oxygen-permeable, and deoxidizing agent packaging material includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence and mixed by stirring with a high-speed mixer to prepare pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Finally, cut it to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

[0013] Preferably, in step S1, the stirring speed is controlled at 640 rpm to 720 rpm, the stirring temperature is controlled at 35°C to 50°C, and the stirring process is carried out for 15 minutes to 30 minutes to enhance the stirring effect.

[0014] Preferably, in step S4, both the dustproof film and the inner film are coated with carrageenan and then pasted onto the paper tape to ensure a good adhesion.

[0015] The beneficial effects of this invention are: The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of a breathable skeleton layer, a dustproof membrane, and an inner membrane, which can effectively provide dustproof and oxygen-permeable functions. Furthermore, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, and the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented. The deformation resistance and powder leakage prevention performance are greatly improved. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the workflow proposed in this invention. Detailed Implementation

[0017] The present invention will be further explained below with reference to specific embodiments.

[0018] Reference Figure 1 Example 1 This embodiment proposes a dustproof and oxygen-permeable deoxidizer packaging material, which includes an air-permeable skeleton layer, a dustproof film adhered to the upper surface of the air-permeable skeleton layer, and an inner film adhered to the lower surface of the air-permeable skeleton layer. The breathable skeleton layer's raw material composition and content, by weight, includes 20 parts ultra-thin nonwoven fabric, 71 parts pulp, 5 parts modified corn starch, 3 parts plexiglass adhesive, 0.80 parts cellulose, and 0.20 parts ferric hydroxide. The preparation method of the ultra-thin nonwoven fabric is as follows: Polyvinyl alcohol is melt-purified and centrifugally spun into polyvinyl alcohol fibers. These fibers are then physically opened and combed into a thin, uniformly thick cotton web. The primary cotton web is then pressed longitudinally and transversely to achieve initial shaping. Next, it is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed a second time. The drying temperature is 170℃ to obtain the finished ultra-thin nonwoven fabric. The pulp preparation method involves obtaining plant wood powder and applying it to plant wood... Methanol is added to the powder to dissolve the cellulose in the plant wood flour. After solid-liquid separation, a cellulose extract is obtained. The cellulose extract is heated to evaporate the methanol, resulting in a cellulose paste. The cellulose paste is then dehydrated and dried to remove the remaining methanol. Water is added to prepare a fiber pulp, and the water content of the resulting fiber pulp is adjusted to 60 wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp, and the mixture is heated to 60°C to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:2:11, and the mixture is heated to 85°C to carry out an esterification reaction, yielding a pulp liquor. The raw material composition and content of the modified corn starch include 95% by mass. The preparation method of modified corn starch, using corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase, and 1% hexose oxidase (calcium ions as the selected metal ion), is as follows: Corn starch is obtained, and 10 times the volume of deionized water is added to prepare a starch emulsion. Metal ions are then added to the starch emulsion, which is then subjected to a pulsed electric field treatment with a pulse strength of 15 kV / cm, a pulse width of 30 μs, and a pulse treatment time of 10 ms. After the pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis to inactivate the enzymes. Finally, hexose oxidase is added to lactone-derive the oligodextrin in the starch emulsion. The modified corn starch is obtained through a chemical reaction to deactivate enzymes and then air-drying. The inner membrane is a CPP film with a thickness of 22 μm, which can isolate the deoxidizer. The dustproof membrane is a polyethylene (PE) film or a polyethylene terephthalate (PET) film with a thickness of 0.012 mm, a density of 1.4, and a basis weight of 35 g / m². The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of a breathable skeleton layer, a dustproof membrane, and an inner membrane, which can effectively prevent dust and oxygen permeability. Furthermore, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, and the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented. The deformation resistance and powder leakage prevention performance are greatly improved.

[0019] A manufacturing process for a dustproof, oxygen-permeable, and deoxidizing agent packaging material includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence. The mixture is stirred and mixed using a high-speed mixer at a speed of 680 rpm and a temperature of 45°C for 20 minutes to prepare the pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Apply carrageenan to both the dustproof film and the inner film, and then stick them onto the paper tape. Finally, cut the film to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

[0020] Reference Figure 1 Example 2 This embodiment proposes a dustproof and oxygen-permeable deoxidizer packaging material, which includes an air-permeable skeleton layer, a dustproof film adhered to the upper surface of the air-permeable skeleton layer, and an inner film adhered to the lower surface of the air-permeable skeleton layer. The breathable skeleton layer's raw material composition and content, by mass, includes 21 parts ultra-thin nonwoven fabric, 72 parts pulp, 4 parts modified corn starch, 2 parts plexiglass adhesive, 0.70 parts cellulose, and 0.30 parts ferric hydroxide. The preparation method of the ultra-thin nonwoven fabric is as follows: Polyvinyl alcohol is melt-purified and centrifugally spun into polyvinyl alcohol fibers. These fibers are then physically opened and combed into a thin, uniformly thick cotton web. The primary cotton web is then pressed longitudinally and transversely to achieve initial shaping. Next, it is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed a second time. The drying temperature is 170℃ to obtain the finished ultra-thin nonwoven fabric. The pulp preparation method involves obtaining plant wood powder and applying it to plant wood... Methanol is added to the powder to dissolve the cellulose in the plant wood flour. After solid-liquid separation, a cellulose extract is obtained. The cellulose extract is heated to evaporate the methanol, resulting in a cellulose paste. The cellulose paste is then dehydrated and dried to remove the remaining methanol. Water is added to prepare a fiber pulp, and the water content of the resulting fiber pulp is adjusted to 60 wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp, and the mixture is heated to 60°C to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:2:11, and the mixture is heated to 85°C to carry out an esterification reaction, yielding a pulp liquor. The raw material composition and content of the modified corn starch include 95% by mass. The preparation method of modified corn starch, using corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase, and 1% hexose oxidase (calcium ions as the selected metal ion), is as follows: Corn starch is obtained, and 10 times the volume of deionized water is added to prepare a starch emulsion. Metal ions are then added to the starch emulsion, which is then subjected to a pulsed electric field treatment with a pulse strength of 15 kV / cm, a pulse width of 30 μs, and a pulse treatment time of 10 ms. After the pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis to inactivate the enzymes. Finally, hexose oxidase is added to lactone-derive the oligodextrin in the starch emulsion. The modified corn starch is obtained through a chemical reaction to deactivate enzymes and then air-drying. The inner membrane is a CPP film with a thickness of 22 μm, which can isolate the deoxidizer. The dustproof membrane is a polyethylene (PE) film or a polyethylene terephthalate (PET) film with a thickness of 0.012 mm, a density of 1.4, and a basis weight of 35 g / m². The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of a breathable skeleton layer, a dustproof membrane, and an inner membrane, which can effectively prevent dust and oxygen permeability. Furthermore, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, and the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented. The deformation resistance and powder leakage prevention performance are greatly improved.

[0021] A manufacturing process for a dustproof, oxygen-permeable, and deoxidizing agent packaging material includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence. The mixture is stirred and mixed using a high-speed mixer at a speed of 680 rpm and a temperature of 45°C for 20 minutes to prepare the pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Apply carrageenan to both the dustproof film and the inner film, and then stick them onto the paper tape. Finally, cut the film to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

[0022] Reference Figure 1 Example 3 This embodiment proposes a dustproof and oxygen-permeable deoxidizer packaging material, which includes an air-permeable skeleton layer, a dustproof film adhered to the upper surface of the air-permeable skeleton layer, and an inner film adhered to the lower surface of the air-permeable skeleton layer. The breathable skeleton layer's raw material composition and content, by mass, includes 20 parts ultra-thin nonwoven fabric, 74 parts pulp, 3 parts modified corn starch, 2 parts plexiglass adhesive, 0.70 parts cellulose, and 0.30 parts ferric hydroxide. The preparation method of the ultra-thin nonwoven fabric is as follows: Polyvinyl alcohol is melt-purified and centrifugally spun into polyvinyl alcohol fibers. These fibers are then physically opened and combed into a thin, uniformly thick cotton web. The primary cotton web is then pressed longitudinally and transversely to achieve initial shaping. Next, it is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed a second time. The drying temperature is 170℃ to obtain the finished ultra-thin nonwoven fabric. The pulp preparation method involves obtaining plant wood powder and applying it to plant wood... Methanol is added to the powder to dissolve the cellulose in the plant wood flour. After solid-liquid separation, a cellulose extract is obtained. The cellulose extract is heated to evaporate the methanol, resulting in a cellulose paste. The cellulose paste is then dehydrated and dried to remove the remaining methanol. Water is added to prepare a fiber pulp, and the water content of the resulting fiber pulp is adjusted to 60 wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp, and the mixture is heated to 60°C to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:2:11, and the mixture is heated to 85°C to carry out an esterification reaction, yielding a pulp liquor. The raw material composition and content of the modified corn starch include 95% by mass. The preparation method of modified corn starch, using corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase, and 1% hexose oxidase (calcium ions as the selected metal ion), is as follows: Corn starch is obtained, and 10 times the volume of deionized water is added to prepare a starch emulsion. Metal ions are then added to the starch emulsion, which is then subjected to a pulsed electric field treatment with a pulse strength of 15 kV / cm, a pulse width of 30 μs, and a pulse treatment time of 10 ms. After the pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis to inactivate the enzymes. Finally, hexose oxidase is added to lactone-derive the oligodextrin in the starch emulsion. The modified corn starch is obtained through a chemical reaction to deactivate enzymes and then air-drying. The inner membrane is a CPP film with a thickness of 22 μm, which can isolate the deoxidizer. The dustproof membrane is a polyethylene (PE) film or a polyethylene terephthalate (PET) film with a thickness of 0.012 mm, a density of 1.4, and a basis weight of 35 g / m². The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of a breathable skeleton layer, a dustproof membrane, and an inner membrane, which can effectively prevent dust and oxygen permeability. Furthermore, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, and the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented. The deformation resistance and powder leakage prevention performance are greatly improved.

[0023] A manufacturing process for a dustproof, oxygen-permeable, and deoxidizing agent packaging material includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence. The mixture is stirred and mixed using a high-speed mixer at a speed of 680 rpm and a temperature of 45°C for 20 minutes to prepare the pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Apply carrageenan to both the dustproof film and the inner film, and then stick them onto the paper tape. Finally, cut the film to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

[0024] Reference Figure 1 Example 4 This embodiment proposes a dustproof and oxygen-permeable deoxidizer packaging material, which includes an air-permeable skeleton layer, a dustproof film adhered to the upper surface of the air-permeable skeleton layer, and an inner film adhered to the lower surface of the air-permeable skeleton layer. The breathable skeleton layer's raw material composition and content, by mass, includes 22 parts ultra-thin nonwoven fabric, 70 parts pulp, 5 parts modified corn starch, 2 parts plexiglass adhesive, 0.60 parts cellulose, and 0.40 parts ferric hydroxide. The preparation method of the ultra-thin nonwoven fabric is as follows: Polyvinyl alcohol is melt-purified and centrifugally spun into polyvinyl alcohol fibers. These fibers are then physically opened and combed into a thin, uniformly thick cotton web. The primary cotton web is then pressed longitudinally and transversely to achieve initial shaping. Next, it is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed a second time. The drying temperature is 170℃ to obtain the finished ultra-thin nonwoven fabric. The pulp preparation method involves obtaining plant wood powder and applying it to plant wood... Methanol is added to the powder to dissolve the cellulose in the plant wood flour. After solid-liquid separation, a cellulose extract is obtained. The cellulose extract is heated to evaporate the methanol, resulting in a cellulose paste. The cellulose paste is then dehydrated and dried to remove the remaining methanol. Water is added to prepare a fiber pulp, and the water content of the resulting fiber pulp is adjusted to 60 wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp, and the mixture is heated to 60°C to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:2:11, and the mixture is heated to 85°C to carry out an esterification reaction, yielding a pulp liquor. The raw material composition and content of the modified corn starch include 95% by mass. The preparation method of modified corn starch, using corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase, and 1% hexose oxidase (calcium ions as the selected metal ion), is as follows: Corn starch is obtained, and 10 times the volume of deionized water is added to prepare a starch emulsion. Metal ions are then added to the starch emulsion, which is then subjected to a pulsed electric field treatment with a pulse strength of 15 kV / cm, a pulse width of 30 μs, and a pulse treatment time of 10 ms. After the pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis to inactivate the enzymes. Finally, hexose oxidase is added to lactone-derive the oligodextrin in the starch emulsion. The modified corn starch is obtained through a chemical reaction to deactivate enzymes and then air-drying. The inner membrane is a CPP film with a thickness of 22 μm, which can isolate the deoxidizer. The dustproof membrane is a polyethylene (PE) film or a polyethylene terephthalate (PET) film with a thickness of 0.012 mm, a density of 1.4, and a basis weight of 35 g / m². The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of a breathable skeleton layer, a dustproof membrane, and an inner membrane, which can effectively prevent dust and oxygen permeability. Furthermore, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, and the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented. The deformation resistance and powder leakage prevention performance are greatly improved.

[0025] A manufacturing process for a dustproof, oxygen-permeable, and deoxidizing agent packaging material includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence. The mixture is stirred and mixed using a high-speed mixer at a speed of 680 rpm and a temperature of 45°C for 20 minutes to prepare the pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Apply carrageenan to both the dustproof film and the inner film, and then stick them onto the paper tape. Finally, cut the film to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

[0026] Reference Figure 1 Example 5 This embodiment proposes a dustproof and oxygen-permeable deoxidizer packaging material, which includes an air-permeable skeleton layer, a dustproof film adhered to the upper surface of the air-permeable skeleton layer, and an inner film adhered to the lower surface of the air-permeable skeleton layer. The breathable skeleton layer's raw material composition and content, by weight, includes 15 parts ultra-thin nonwoven fabric, 80 parts pulp, 3 parts modified corn starch, 1 part plexiglass adhesive, 0.80 parts cellulose, and 0.20 parts ferric hydroxide. The preparation method of the ultra-thin nonwoven fabric is as follows: Polyvinyl alcohol is melt-purified and centrifugally spun into polyvinyl alcohol fibers. These fibers are then physically opened and combed into a thin, uniformly thick cotton web. The primary cotton web is then pressed longitudinally and transversely to achieve initial shaping. Next, it is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed a second time. The drying temperature is 170℃ to obtain the finished ultra-thin nonwoven fabric. The pulp preparation method involves obtaining plant wood powder and applying it to plant wood... Methanol is added to the powder to dissolve the cellulose in the plant wood flour. After solid-liquid separation, a cellulose extract is obtained. The cellulose extract is heated to evaporate the methanol, resulting in a cellulose paste. The cellulose paste is then dehydrated and dried to remove the remaining methanol. Water is added to prepare a fiber pulp, and the water content of the resulting fiber pulp is adjusted to 60 wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp, and the mixture is heated to 60°C to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:2:11, and the mixture is heated to 85°C to carry out an esterification reaction, yielding a pulp liquor. The raw material composition and content of the modified corn starch include 95% by mass. The preparation method of modified corn starch, using corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase, and 1% hexose oxidase (calcium ions as the selected metal ion), is as follows: Corn starch is obtained, and 10 times the volume of deionized water is added to prepare a starch emulsion. Metal ions are then added to the starch emulsion, which is then subjected to a pulsed electric field treatment with a pulse strength of 15 kV / cm, a pulse width of 30 μs, and a pulse treatment time of 10 ms. After the pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis to inactivate the enzymes. Finally, hexose oxidase is added to lactone-derive the oligodextrin in the starch emulsion. The modified corn starch is obtained through a chemical reaction to deactivate enzymes and then air-drying. The inner membrane is a CPP film with a thickness of 22 μm, which can isolate the deoxidizer. The dustproof membrane is a polyethylene (PE) film or a polyethylene terephthalate (PET) film with a thickness of 0.012 mm, a density of 1.4, and a basis weight of 35 g / m². The dustproof and oxygen-permeable deoxidizer packaging material of this application adopts a three-layer structure of a breathable skeleton layer, a dustproof membrane, and an inner membrane, which can effectively prevent dust and oxygen permeability. Furthermore, by utilizing the material properties of the breathable skeleton layer, the strength of the dustproof and oxygen-permeable deoxidizer packaging material can be enhanced, the tensile strength can be improved, and the tearing and deformation of the dustproof and oxygen-permeable deoxidizer packaging material can be prevented. The deformation resistance and powder leakage prevention performance are greatly improved.

[0027] A manufacturing process for a dustproof, oxygen-permeable, and deoxidizing agent packaging material includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence. The mixture is stirred and mixed using a high-speed mixer at a speed of 680 rpm and a temperature of 45°C for 20 minutes to prepare the pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Apply carrageenan to both the dustproof film and the inner film, and then stick them onto the paper tape. Finally, cut the film to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

[0028] The following table compares the conventional oxygen absorber packaging materials with the oxygen absorber packaging materials prepared in Examples 1 to 5:

[0029] Test method: Tests were conducted according to Q / HMR01-2019 "Other types of multi-layer composite food packaging films (bags)".

[0030] The test method for preventing powder leakage is as follows: Take a sample, cut open the seal and pour out the raw material. Place the package flat on the table and lay two layers of facial tissue underneath. Use a burette to drop 0.1ml of red ink onto the surface of the package, covering an area approximately half the breathable area of ​​a small unit. Let it stand for 5 minutes and then check whether the facial tissue underneath the product has absorbed the red ink. If no red ink is absorbed, the product is considered qualified.

[0031] As can be seen from the table above, the deoxidizer packaging material prepared by the present invention has significantly improved tensile strength, deformation resistance and powder leakage prevention, and embodiment two is the best embodiment.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dustproof, oxygen-permeable, and deoxidizing agent packaging material, characterized in that, The dustproof and oxygen-permeable deoxidizer packaging material includes a breathable skeleton layer, a dustproof film adhered to the upper surface of the breathable skeleton layer, and an inner film adhered to the lower surface of the breathable skeleton layer. The breathable skeleton layer is composed of 15 to 25 parts by weight of ultra-thin nonwoven fabric, 70 to 80 parts by weight of pulp, 1 to 5 parts by weight of modified corn starch, 1 to 5 parts by weight of plexiglass adhesive, 0.50 to 1.00 parts by weight of cellulose and 0.10 to 0.50 parts by weight of ferric hydroxide. Modified corn starch, cellulose, ferric hydroxide and plexiglass adhesive are added to the pulp, stirred and mixed, and then sprayed onto the ultra-thin nonwoven fabric to obtain the breathable skeleton layer. The preparation method of the ultra-thin nonwoven fabric is as follows: polyvinyl alcohol is melt-purified and made into polyvinyl alcohol fibers by centrifugal spinning. Then, the polyvinyl alcohol fibers are combed into a thin cotton web of uniform thickness by physical opening. The primary cotton web is pressed longitudinally and transversely to form a preliminary shape in one pressing. Then, it is impregnated with a polyvinyl alcohol aqueous solution adhesive and pressed for a second pressing. The drying temperature is 160℃-190℃ to obtain the finished ultra-thin nonwoven fabric. The method for preparing the pulp liquor is as follows: Plant wood flour is obtained, methanol is added to the plant wood flour, and the cellulose in the plant wood flour is dissolved using methanol. After solid-liquid separation, a cellulose dissolution solution is obtained. The cellulose dissolution solution is heated, and the methanol is evaporated using heat to obtain a cellulose paste. The cellulose paste is dehydrated, and the remaining methanol in the cellulose paste is dried and evaporated. Water is added to prepare a fiber pulp. The water content of the obtained fiber pulp is adjusted to 50wt%–70wt%. Based on this water content, excess acetic anhydride is added to the fiber pulp. The mixture is heated to 50℃–70℃ to carry out a hydrolysis reaction. The mass ratio of cellulose, acetic anhydride, and acetic acid is adjusted to 1:(2–3):(8–12). The mixture is heated to 80℃–95℃ to carry out an esterification reaction to obtain the pulp liquor. The modified corn starch comprises, by mass, 95% corn starch, 1% chitosan, 1% metal ions, 2% maltose amylase and 1% hexose oxidase, wherein the metal ions are selected from calcium ions, copper ions and magnesium ions. The modified corn starch is prepared as follows: corn starch is obtained, 10 times the amount of deionized water is added to the corn starch, and the mixture is prepared into a starch emulsion. Metal ions are added to the starch emulsion, and the starch emulsion after adding metal ions is subjected to pulsed electric field treatment. The pulse field strength is 10KV / cm~30KV / cm, the pulse width is 20μs~40μs, and the pulse treatment time is 10ms. After pulsed electric field treatment, chitosan and maltose amylase are added for enzymatic hydrolysis and inactivation of enzymes. Then, hexose oxidase is added to perform lactone reaction on oligodextrin in the starch emulsion and inactivate enzymes. After air drying, modified corn starch is obtained.

2. The dustproof, oxygen-permeable, and deoxidizing agent packaging material according to claim 1, characterized in that, The inner membrane is made of CPP membrane with a thickness of 20um to 25um.

3. A production process for preparing the dustproof, oxygen-permeable, and deoxidizing agent packaging material as described in claim 1, characterized in that, Includes the following steps: S1: Modified corn starch, cellulose, ferric hydroxide and plexiglass glue are added to the pulp solution in sequence and mixed by stirring with a high-speed mixer to prepare pulp. S2: Lay the ultra-thin non-woven fabric flat, and then spray the pulp evenly onto the ultra-thin non-woven fabric so that the pulp soaks and covers the ultra-thin non-woven fabric, removes some of the moisture, and becomes a wet pulp strip. S3: The rollers press the fibers and ultra-thin nonwoven fabric in the pulp belt together, squeezing out the water and making the pulp belt denser. The smooth surface of the paper is ironed smooth by the rollers, and the pulp belt is dried at the same time to obtain the paper belt. S4: Heat the dustproof film and stick it to the front of the paper tape. Heat the inner film and stick it to the back of the paper tape. Finally, cut it to obtain the dustproof, oxygen-permeable, and deoxidizing agent packaging material.

4. The production process of a dustproof, oxygen-permeable, and deoxidizing agent packaging material according to claim 3, characterized in that, In step S1, the stirring speed is controlled at 640 rpm to 720 rpm, the stirring temperature is controlled at 35℃ to 50℃, and the stirring process lasts for 15 minutes to 30 minutes.

5. The production process of a dustproof, oxygen-permeable, and deoxidizing agent packaging material according to claim 3, characterized in that, In step S4, both the dustproof film and the inner film are coated with carrageenan and then pasted onto the paper tape.

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