Degradable packaging bean paper as well as preparation method and application thereof
By using raw materials such as potato starch, soy protein fiber powder and soy protein isolate, the problem of difficult degradation of plastic packaging materials and environmental pollution is solved, and a green and environmentally friendly packaging solution is achieved, and it is provided in agriculture. The dual functions of insulation and nutrients.
Patent Information
- Application Number
- CN202411211004.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-01-10
AI Technical Summary
Existing plastic packaging materials are difficult to degrade, resulting in environmental pollution, difficult recycling, and a large amount of greenhouse gases emitted in the production process, affecting climate change.
Degradable packaging bean paper prepared with raw materials such as potato starch, soy protein fiber powder and soy protein isolate, which increases the ductility and strength of the paper and degrades in hot water and nature through specific ingredients ratios and processes.
It provides a green and environmentally friendly packaging material, solves the problem of non-degradable traditional plastic packaging, reduces environmental pollution and greenhouse gas emissions, and is more edible, avoids the risk of children accidentally eating plastic, and in agriculture It has the dual functions of insulation and nutrients.
Smart Images
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Figure HDA0005020315110000012
Abstract
Description
Technical Field
[0001] The invention belongs to the field of packaging materials and relates to degradable packaging bean paper and a preparation method and application thereof. Background Art
[0002] Most of the existing wrapping paper is mainly made of plastic, which brings great convenience to people while also causing irreversible pollution to the environment. Plastic is difficult to degrade in nature, so it brings a load-bearing burden to nature. Existing traditional plastic packaging has many disadvantages: 1. The difficulty of plastic degradation causes pollution to the environment. 2. Recycling is difficult and expensive, and the recycling rate is reduced. 3. The production process emits more greenhouse gases, exacerbating climate change. The above disadvantages are caused by the following reasons: 1. There are still various pollutants in the plastic, 2. The burning of a large amount of fossil fuels leads to the emission of a large amount of greenhouse gases, exacerbating the ozone hole, 3. Because the plastic itself is a mixture, the recycling process is complicated. Summary of the invention
[0003] In order to overcome the shortcomings of the prior art, the present invention provides a degradable packaging bean paper and a preparation method and application thereof. The bean paper is degradable and pollution-free, which replaces traditional disposable packaging paper. The bean paper preparation method is green, environmentally friendly and pollution-free. The ductility and strength of the paper are increased by limiting the raw material ratio and technological upgrading. The paper can be degraded in hot water and nature, which well solves the problem that traditional plastics are non-degradable.
[0004] The above object of the present invention is achieved through the following technical solutions:
[0005] A degradable bean paper for packaging comprises potato starch, soybean protein fiber powder, soybean protein isolate and phospholipid emulsion, wherein the weight ratio of potato starch, soybean protein fiber powder, soybean protein isolate and phospholipid emulsion is 40-50:10:2:1.
[0006] The preparation method of the above-mentioned degradable packaging bean paper: potato starch and soybean protein fiber powder are screened with 100 meshes and then mixed with 50-55°C warm water in a weight ratio of 1:8-10 to obtain starch emulsion; starch gelatinization is performed: the starch emulsion is sent to a gelatinization pot and heated to 50-55°C and then stirred, 84-90°C hot water is added, and the temperature is kept for 1-2 hours; the stirring speed is 40 revolutions per minute, and the starch concentration is controlled at 7-8wt%; after stirring, soybean protein isolate and phospholipid emulsion are added, and the mixture is continuously stirred and evenly dispersed in water, and finally passed through a 100-mesh copper sieve; starch paste is obtained, and film is made to obtain packaging bean paper.
[0007] The phospholipid emulsion is specifically prepared as follows: a 1-2wt% caustic soda solution is heated to 85-100°C, phospholipids are added under stirring, and heated to make them all dissolved in the caustic soda solution, cooled to 30-40°C, and passed through a 100-mesh sieve to prepare a phospholipid solution with a concentration of 1-2wt%, wherein the amount of caustic soda used is 0.8-1.8wt% of the phospholipids, and the pH value of the phospholipid emulsion is 8-9, which is weakly alkaline.
[0008] The film making is carried out using a film making machine.
[0009] The film making machine is composed of two drying cylinders and a copper belt connected into a whole. The drying cylinders are heated by steam and the copper belt is driven forward at a speed of 1 revolution per minute.
[0010] The steam pressure in the drying cylinder is 0.15-0.25 kg / cm 2 (gauge pressure). Steam should be sprayed into the machine to adjust the humidity. Too much steam will make the operation difficult, and too little steam will make the film brittle.
[0011] The drying cylinder is an aluminum drying cylinder; its diameter is 600 mm.
[0012] The copper strip is 13 meters long, 400 mm wide and 0.7 mm thick.
[0013] The specific process of film making is as follows: starch paste flows through a slit with a width of 0.14-0.15 mm onto a copper belt (the height of the feeding trough is 8-10 cm), and is scraped into a uniform film with a thickness of 7-10 microns, which is then wound on a paper roll after drying to obtain packaging bean paper.
[0014] The finished product of the packaging bean paper is soybean protein glutinous rice paper, and the water content of the paper is not less than 10wt%.
[0015] Preferably, 1 wt% alginate is added before starch gelatinization.
[0016] The present invention also seeks to protect the use of the packaging bean paper prepared by the above preparation method in preparing instant noodle seasoning packets, preparing coffee powder inner packets, preparing dinner plate paper, and preparing agricultural plastic covering films.
[0017] The beneficial effects of the present invention compared with the prior art are:
[0018] The degradable bean paper for packaging provided by the present invention has constant quality and can replace traditional disposable packaging paper. The preparation method of the bean paper is green, environmentally friendly and pollution-free. The ductility and strength of the paper are increased by limiting the raw material ratio and upgrading the technology. The bean paper can also be degraded in hot water and nature, which well solves the problem that traditional plastics are non-degradable. Its edibility has achieved an advantage that traditional plastics cannot achieve. At the same time, it also avoids the risk of children accidentally eating plastics and reduces the dangers brought by plastics.
[0019] The present invention uses potato starch, soy protein fiber powder and soy protein isolate as raw materials, thus achieving a green effect from the raw materials. The prepared packaging bean paper can be dissolved in hot water, thereby avoiding the problem of coffee powder spilling when the coffee powder inner bag is torn, and can also enrich the taste of coffee. In agriculture, it is used as a plastic film to keep plants warm and can also provide nutrients for crops during the decomposition process. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of packaging materials in the prior art.
[0021] Figure 2 This is a schematic diagram of the packaging bean paper prepared in the present invention. DETAILED DESCRIPTION
[0022] The present invention is described in detail below by specific examples, but the protection scope of the present invention is not limited. Unless otherwise specified, the experimental methods adopted in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can be obtained from commercial sources. The following examples are intended to illustrate but not to limit the invention. In these examples, unless otherwise specified, the parts and percentages described are all by weight percentage.
[0023] Example 1
[0024] Potato starch and soybean protein fiber powder are screened through 100 meshes and then mixed with 50°C warm water in a weight ratio of 1:10 to obtain starch emulsion, the starch emulsion is sent to a gelatinization pot and heated to 50°C before stirring, 84°C hot water is added, and the mixture is kept warm for 1 hour; the stirring speed is 40 revolutions per minute, and the starch concentration is controlled at 7wt%; after stirring, soybean protein isolate and phospholipid emulsion are added, and the mixture is uniformly dispersed in water by continuous stirring, and finally passed through a 100-mesh copper sieve; starch paste is obtained, and film is made to obtain packaging bean paper.
[0025] The phospholipid emulsion is specifically prepared as follows: a 1wt% caustic soda solution is heated to 85°C, phospholipids are added under stirring, and heated to completely dissolve in the caustic soda solution, cooled to 30°C, passed through a 100-mesh sieve, and prepared into a phospholipid solution with a concentration of 1wt%, the amount of caustic soda used is 0.8wt% of the phospholipids, and the pH value of the phospholipid emulsion is 8, which is weakly alkaline.
[0026] The film making is carried out using a film making machine.
[0027] The film making machine is composed of two drying cylinders and a copper belt connected into a whole. The drying cylinders are heated by steam and the copper belt is driven forward at a speed of 1 revolution per minute.
[0028] The steam pressure in the drying cylinder is 0.15 kg / cm 2 (gauge pressure). Steam should be sprayed into the machine to adjust the humidity. Too much steam will make the operation difficult, and too little steam will make the film brittle.
[0029] The drying cylinder is an aluminum drying cylinder; its diameter is 600 mm.
[0030] The copper strip is 13 meters long, 400 mm wide and 0.7 mm thick.
[0031] The specific process of film making is as follows: starch paste flows through a slit with a width of 0.14 mm onto a copper belt (the height of the feeding trough is 8 cm), and is scraped into a uniform film with a thickness of 7 microns, which is then wound onto a paper roll after drying to obtain packaging bean paper.
[0032] The finished product of the packaging bean paper is soybean protein glutinous rice paper, and the water content of the paper is not less than 10wt%.
[0033] Example 2
[0034] Potato starch and soybean protein fiber powder are screened through 100 meshes and then mixed with 55°C warm water in a weight ratio of 1:10 to obtain starch emulsion, the starch emulsion is sent to a gelatinization pot and heated to 50°C before stirring, 90°C hot water is added, and the mixture is kept warm for 2 hours; the stirring speed is 40 revolutions per minute, and the starch concentration is controlled at 8wt%; after stirring, soybean protein isolate and phospholipid emulsion are added, and the mixture is continuously stirred and uniformly dispersed in water, and finally passed through a 100-mesh copper sieve; starch paste is obtained, and film is made to obtain packaging bean paper.
[0035] The phospholipid emulsion is specifically prepared as follows: a 2wt% caustic soda solution is heated to 100°C, phospholipids are added under stirring, and heated to completely dissolve in the caustic soda solution, cooled to 40°C, and passed through a 100-mesh sieve to prepare a phospholipid solution with a concentration of 2wt%. The amount of caustic soda used is 1.8wt% of the phospholipids, and the pH value of the phospholipid emulsion is 9, which is weakly alkaline.
[0036] The film making is carried out using a film making machine.
[0037] The film making machine is composed of two drying cylinders and a copper belt connected into a whole. The drying cylinders are heated by steam and the copper belt is driven forward at a speed of 1 revolution per minute.
[0038] The steam pressure in the drying cylinder is 0.25 kg / cm 2 (gauge pressure). Steam should be sprayed into the machine to adjust the humidity. Too much steam will make the operation difficult, and too little steam will make the film brittle.
[0039] The drying cylinder is an aluminum drying cylinder; its diameter is 600 mm.
[0040] The copper strip is 13 meters long, 400 mm wide and 0.7 mm thick.
[0041] The specific process of film making is as follows: starch paste flows through a slit with a width of 0.15 mm onto a copper belt (the height of the feeding trough is 10 cm), and is scraped into a uniform film with a thickness of 7 microns, which is then wound on a paper roll after drying to obtain packaging bean paper.
[0042] The finished product of the packaging bean paper is soybean protein glutinous rice paper, and the water content of the paper is not less than 10wt%.
[0043] The above-described embodiments are only preferred embodiments of the present invention, but not all feasible embodiments of the present invention. For those skilled in the art, any obvious changes made thereto without departing from the principles and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention.
Claims
1. A degradable bean paper packaging, characterized in that: The invention comprises potato starch, soybean protein fiber powder, soybean protein isolate and phospholipid emulsion, wherein the weight ratio of potato starch, soybean protein fiber powder, soybean protein isolate and phospholipid emulsion is 40-50:10:2:
1.
2. The method for preparing the degradable bean paper packaging according to claim 1, characterized in that: Potato starch and soybean protein fiber powder are screened through 100 meshes and then mixed with 50-55°C warm water in a weight ratio of 1:8-10 to obtain starch emulsion, the starch emulsion is sent to a gelatinization pot and heated to 50-55°C and then stirred, 84-90°C hot water is added and kept warm for 1-2 hours; the stirring speed is 40 revolutions per minute, and the starch concentration is controlled at 7-8wt%; after stirring, soybean protein isolate and phospholipid emulsion are added, and the mixture is uniformly dispersed in water by continuous stirring, and finally passed through a 100-mesh copper sieve; starch paste is obtained, and film is made to obtain packaging bean paper.
3. The method for preparing a degradable bean paper packaging as claimed in claim 2, characterized in that: The configuration of the phospholipid emulsion is as follows: a 1-2wt% caustic soda solution is heated to 85-100°C, phospholipid is added under stirring, and heated to make it completely dissolved in the caustic soda solution, cooled to 30-40°C, passed through a 100-mesh sieve, and a phospholipid solution with a concentration of 1-2wt% is prepared. The amount of caustic soda used is 0.8-1.8wt% of the phospholipid, and the pH value of the phospholipid emulsion is 8-9, which is weakly alkaline.
4. The method for preparing a degradable bean paper packaging as claimed in claim 2, characterized in that: The film is made by using a film making machine.
5. The method for preparing a degradable bean paper packaging as claimed in claim 2, characterized in that: The starch paste flows onto the copper belt through a slit with a width of 0.14 to 0.15 mm, and is scraped into a uniform film with a thickness of 7 to 10 microns. After drying, the film is wound on a paper roll to obtain packaging bean paper.
6. Use of the packaging bean paper prepared by the preparation method according to any one of claims 2 to 5 in preparing instant noodle seasoning packets.
7. Use of the packaging bean paper prepared by the preparation method according to any one of claims 2 to 5 in preparing inner bags of coffee powder.
8. Use of the packaging bean paper prepared by the preparation method according to any one of claims 2 to 5 in preparing tableware paper.
9. Use of the packaging bean paper prepared by the preparation method according to any one of claims 2 to 5 in preparing agricultural plastic covering films.