A processing technology for straw woven material and its application in making bags

Abstract

The invention provides a processing process of straw material and its application in preparing bags, and relates to the technical field of straw material. The processing process of the straw material of the invention comprises the following steps: using pest-free straw stalks as raw materials, removing impurities and dead leaves, and rinsing with water; soaking the straw stalks in a potassium permanganate aqueous solution with a mass concentration of 0.5-1% for 2-3 hours, and then rinsing with water for 3-5 minutes; boiling the straw stalks treated with the potassium permanganate aqueous solution in a softener for 1-2 hours; soaking the straw stalks treated with the softener in a strengthener for 3-5 hours, and then rinsing the strengthener remaining on the surface with clean water; drying the straw stalks treated with the strengthener in a drying machine at a temperature of 40-50°C, and drying to a water content of 6-8%. The processing process of the straw material can effectively improve the toughness and strength of the treated material while improving the anticorrosive performance of the straw material.

Description

Technical Field

[0001] The invention relates to the technical field of straw materials, and in particular to a straw material processing process and application thereof in bag preparation. Background Art

[0002] As a traditional handicraft, straw weaving is widely welcomed and paid attention to due to its unique materials, techniques and beautiful appearance. However, there are some problems in the processing of raw materials in traditional straw weaving, such as poor anti-corrosion performance, insufficient toughness, easy to produce color spots, etc. These problems limit the wide application of straw weaving handicrafts. Therefore, it is particularly important to improve the processing technology of straw weaving materials.

[0003] There are many existing straw material processing processes, but there are some common problems. For example, some processes use a large amount of chemical agents during the processing, which not only increases the cost but also may cause environmental pollution. In addition, although some processes can improve the anti-corrosion performance of straw materials, the toughness and strength of the treated materials are reduced, which affects the service life of the product.

[0004] Straw weaving not only plays an important role in traditional handicraft production, but also shows broad application prospects in modern packaging design. With the enhancement of people's environmental awareness and changes in aesthetic concepts, straw weaving materials have gradually become an important choice for packaging materials such as packaging bags due to their environmental protection, durability and beauty.

[0005] In the process of making bags, the use of straw materials has many advantages. First, straw materials have natural environmental protection properties and will not cause harm to the environment and human body. Secondly, straw materials have good air permeability and moisture absorption, which can keep the items in the bag dry and comfortable. In addition, straw materials also have unique texture and texture, which can give the packaging bag a unique visual effect and artistic beauty.

[0006] However, the application of straw materials in the preparation of bags also faces some challenges, such as how to ensure the anti-corrosion performance and durability of straw materials to meet the needs of long-term use; how to optimize the processing and weaving process of straw materials to improve production efficiency and reduce costs, etc.

[0007] In view of the above-mentioned problems, the present invention provides a straw material processing process and application thereof in making bags. Summary of the invention

[0008] The purpose of the present invention is to provide a straw material processing process and application thereof in preparing bags, which can improve the anti-corrosion performance of the straw material and effectively improve the toughness and strength of the treated material.

[0009] In one aspect, the present invention provides a straw material processing process, comprising the steps of:

[0010] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water;

[0011] (2) soaking in a potassium permanganate aqueous solution and then rinsing with water;

[0012] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener;

[0013] (4) soaking the straw treated with the softener in the strengthening agent, and then washing the strengthening agent remaining on the surface with clean water;

[0014] (5) Drying the rice straw treated with the strengthener in a dryer to a moisture content of 6-8%.

[0015] Furthermore, the rinsing time in step (1) is 10-15 minutes; the mass concentration of the potassium permanganate aqueous solution in step (2) is 0.5-1%, the soaking time is 2-3 hours, and the flushing time is 3-5 minutes.

[0016] Furthermore, the softening agent in step (3) comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of (6-8): (60-70): (20-30): (0.01-0.02).

[0017] Furthermore, the cooking time in step (3) is 1-2 hours.

[0018] Furthermore, the strengthening agent in step (3) comprises the following raw materials in parts by weight: 20-30 parts of epoxy resin modified corn starch, 2-3 parts of 3-glycidyloxypropyltrimethoxysilane, 8-10 parts of acetone, 30-40 parts of deionized water and 10-15 parts of calcium carbonate.

[0019] Furthermore, the preparation steps of the epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium dodecyl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring at a temperature of 35-45° C. for 1.5-2.5 hours to obtain the obtained product.

[0020] Epoxy resin itself has high mechanical strength and toughness, and these properties are transferred to the modified corn starch through grafting and cross-linking reactions with corn starch.

[0021] The cross-linked structure formed between maleic anhydride, epoxy resin and corn starch can effectively disperse and absorb external impact and stress, thereby improving the toughness and strength of the material.

[0022] There may be good interfacial interaction between the modified corn starch and the straw material, which enables the two to be closely combined together to jointly withstand external pressure and tension, further improving the overall performance of the material.

[0023] Furthermore, the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is (1.5-2.5): (60-70): (6-8): (14-16): (30-40).

[0024] Furthermore, the soaking time in step (4) is 3-5 hours.

[0025] Furthermore, the drying temperature in step (5) is 40-50°C.

[0026] On the other hand, the present invention also provides a processing process of the straw material for use in the preparation of bags.

[0027] The beneficial effects of the present invention are:

[0028] In the present invention, potassium permanganate fully penetrates into the interior of the rice straw, and kills potential microorganisms by utilizing its strong oxidizing property, and simultaneously may change the microstructure of the rice straw, which is beneficial to the subsequent softening treatment.

[0029] The softening agent in the present invention is a combination of potassium hydroxide, deionized water, ethanol and penetrant HY-5211, forming an effective softening system. Potassium hydroxide, as the main softening agent, can destroy the cellulose structure in the straw, making it soft and easy to process; deionized water and ethanol, as solvents, help potassium hydroxide to penetrate better; penetrant HY-5211 further improves the penetration efficiency.

[0030] In the present invention, the penetrant HY-5211 is selected as the raw material of the softener. The penetrant HY-5211 is a low molecular weight silicone polyether nonionic surfactant with extremely low surface tension. It can quickly wet the surface of the straw and penetrate into the fiber, so that the subsequent treatment agent can be more evenly distributed in the straw; in the strengthening agent treatment stage, the penetrant HY-5211 can promote the chemical reaction between strengthening agent components such as epoxy resin modified corn starch and straw fibers to form a more compact structure, thereby improving the overall performance of the material.

[0031] In the present invention, penetrant HY-5211 and potassium hydroxide are selected as raw materials of softeners, and the two play a synergistic role in the treatment process. The softening effect of potassium hydroxide makes it easier for the straw stalk fibers to be wetted and penetrated by the penetrant HY-5211; and the wetting and penetration of the penetrant HY-5211 helps the potassium hydroxide and other treatment agents to be more evenly distributed in the straw stalks. By forming a tighter and stronger chemical bond and enhancing the bonding force between the fibers, the penetrant HY-5211 and potassium hydroxide jointly improve the anticorrosive performance of the straw material. This performance improvement makes the straw material more weather-resistant and durable, and can resist the erosion of the external environment.

[0032] The epoxy resin modified corn starch in the present invention is used as the main component of the strengthening agent. During the preparation process, after maleic anhydride is stirred and dispersed in water, the carboxyl groups in the molecules may be partially hydrolyzed with hydrogen ions in water to form carboxylate ions. These carboxylate ions can undergo esterification reaction with hydroxyl groups in corn starch to form a cross-linked structure. Meanwhile, the molecular structure of maleic anhydride also makes it possible to further react with the epoxy resin. Moreover, the epoxy groups in the epoxy resin can react with the carboxylate ions generated by the hydrolysis of maleic anhydride or the hydroxyl groups in corn starch to form a grafted or cross-linked structure. This structure enables the modified corn starch to have better mechanical properties and improves the strength of the rice straw.

[0033] In addition, the introduction of epoxy resin and maleic anhydride makes the chemical structure of corn starch more stable and not easily degraded by microorganisms, thus improving the antiseptic properties of straw materials. The modified corn starch can form a dense protective film covering the surface of straw materials, effectively preventing the intrusion of moisture, oxygen and microorganisms, further enhancing the antiseptic effect. DETAILED DESCRIPTION

[0034] The technical scheme of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the raw materials can be obtained commercially.

[0035] Example 1

[0036] This embodiment provides a straw material processing process, the steps comprising:

[0037] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0038] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0039] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours at a temperature of 85° C.; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 7:65:25:0.015;

[0040] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0041] The strengthening agent includes the following raw materials in parts by weight: 25 parts of epoxy resin modified corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of calcium carbonate;

[0042] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 2 hours at a temperature of 40°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2:65:7:15:35;

[0043] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0044] Example 2

[0045] This embodiment provides a straw material processing process, the steps comprising:

[0046] (1) Use pest-free rice straw as raw material, remove impurities and dead leaves, and rinse with water for 10 minutes;

[0047] (2) Soaking in a 0.5% potassium permanganate aqueous solution for 2 h, and then rinsing with water for 3 min;

[0048] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener at 85° C. for 1 hour; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 6:60:20:0.01;

[0049] (4) Soaking the straw treated with the softener in the strengthener for 3 hours, and then washing the remaining strengthener on the surface with clean water;

[0050] The strengthening agent includes the following raw materials in parts by weight: 20 parts of epoxy resin modified corn starch, 2 parts of 3-glycidyloxypropyltrimethoxysilane, 8 parts of acetone, 30 parts of deionized water and 10 parts of calcium carbonate;

[0051] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 1.5 hours at a temperature of 35°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 1.5:60:6:14:30;

[0052] (5) Drying the rice straw treated with the strengthener in a dryer at a drying temperature of 40° C. until the moisture content is 6%.

[0053] Example 3

[0054] This embodiment provides a straw material processing process, the steps comprising:

[0055] (1) Use pest-free rice straw as raw material, remove impurities and dead leaves, and rinse with water for 15 minutes;

[0056] (2) Soak in a 1% potassium permanganate aqueous solution for 3 h, and then rinse with water for 5 min;

[0057] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener at 85° C. for 1 hour; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 8:70:30:0.02;

[0058] (4) Soaking the straw treated with the softener in the strengthener for 5 hours, and then washing the remaining strengthener on the surface with clean water;

[0059] The strengthening agent includes the following raw materials in parts by weight: 30 parts of epoxy resin modified corn starch, 3 parts of 3-glycidyloxypropyltrimethoxysilane, 10 parts of acetone, 40 parts of deionized water and 15 parts of calcium carbonate;

[0060] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 2.5 hours at a temperature of 45°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2.5:70:8:16:40;

[0061] (5) Drying the rice straw treated with the strengthener in a drying machine at a drying temperature of 50° C. until the moisture content is 8%.

[0062] Example 4

[0063] This embodiment provides a straw material processing process, the steps comprising:

[0064] (1) Use pest-free rice straw as raw material, remove impurities and dead leaves, and rinse with water for 10 minutes;

[0065] (2) Soaking in a 1% potassium permanganate aqueous solution for 2 h, and then rinsing with water for 5 min;

[0066] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 2 hours at a temperature of 85° C.; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 6:70:20:0.02;

[0067] (4) Soaking the straw treated with the softener in the strengthener for 5 hours, and then washing the remaining strengthener on the surface with clean water;

[0068] The strengthening agent includes the following raw materials in parts by weight: 20 parts of epoxy resin modified corn starch, 3 parts of 3-glycidyloxypropyltrimethoxysilane, 8 parts of acetone, 40 parts of deionized water and 10 parts of calcium carbonate;

[0069] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 1.5 hours at a temperature of 45°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2.5:60:8:14:40;

[0070] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 40° C. until the moisture content is 8%.

[0071] Comparative Example 1

[0072] This comparative example provides a straw material processing process, the steps comprising:

[0073] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0074] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0075] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours at a temperature of 85° C.; the softener comprises sodium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 7:65:25:0.015;

[0076] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0077] The strengthening agent includes the following raw materials in parts by weight: 25 parts of epoxy resin modified corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of calcium carbonate;

[0078] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 2 hours at a temperature of 40°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2:65:7:15:35;

[0079] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0080] Comparative Example 2

[0081] This comparative example provides a straw material processing process, the steps comprising:

[0082] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0083] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0084] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours at a temperature of 85° C.; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant JFC-M in a weight ratio of 7:65:25:0.015;

[0085] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0086] The strengthening agent includes the following raw materials in parts by weight: 25 parts of epoxy resin modified corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of calcium carbonate;

[0087] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 2 hours at a temperature of 40°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2:65:7:15:35;

[0088] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0089] Comparative Example 3

[0090] This comparative example provides a straw material processing process, the steps comprising:

[0091] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0092] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0093] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours at a temperature of 85° C.; the softener comprises potassium hydroxide, deionized water, ethanol and a penetrant JFC-ME in a weight ratio of 7:65:25:0.015;

[0094] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0095] The strengthening agent includes the following raw materials in parts by weight: 25 parts of epoxy resin modified corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of calcium carbonate;

[0096] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 2 hours at a temperature of 40°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2:65:7:15:35;

[0097] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0098] Comparative Example 4

[0099] This comparative example provides a straw material processing process, the steps comprising:

[0100] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0101] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0102] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours at a temperature of 85° C.; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 7:65:25:0.015;

[0103] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0104] The reinforcing agent includes the following raw materials in parts by weight: 17.5 parts of epoxy resin, 7.5 parts of corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of calcium carbonate;

[0105] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0106] Comparative Example 5

[0107] This comparative example provides a straw material processing process, the steps comprising:

[0108] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0109] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0110] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours at a temperature of 85° C.; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 7:65:25:0.015;

[0111] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0112] The strengthening agent includes the following raw materials in parts by weight: 25 parts of corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of calcium carbonate;

[0113] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0114] Comparative Example 6

[0115] This comparative example provides a straw material processing process, the steps comprising:

[0116] (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water for 12.5 minutes;

[0117] (2) Soak in a 0.75% potassium permanganate aqueous solution for 2.5 hours, and then rinse with water for 4 minutes;

[0118] (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener for 1.5 hours; the softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of 7:65:25:0.015;

[0119] (4) Soaking the straw treated with the softener in the strengthener for 4 hours, and then washing the remaining strengthener on the surface with clean water;

[0120] The strengthening agent includes the following raw materials in parts by weight: 25 parts of epoxy resin modified corn starch, 2.5 parts of 3-glycidyloxypropyltrimethoxysilane, 9 parts of acetone, 35 parts of deionized water and 12.5 parts of silicon dioxide;

[0121] The preparation steps of epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 2 hours at a temperature of 40°C to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is 2:65:7:15:35;

[0122] (5) Drying the rice straw treated with the strengthener in a dryer at a temperature of 45° C. until the moisture content is 7%.

[0123] Test Example: The straw materials treated by the above-mentioned Examples 1-4 and Comparative Examples 1-6 were tested.

[0124] 1. Mildew resistance level: Select dry, clean, and undamaged straw material samples, use a sterilized sprayer to evenly spray the mixed mold spore suspension on the sample surface to ensure that the entire sample surface is moistened. Cultivate for 28 days and evaluate the mildew resistance of the straw material based on the growth of mold. The mildew resistance level is 1-5, with 5 being the best.

[0125] 2. Compression resistance test: Tested using a compression strength testing machine, where compression strength = maximum pressure / sample area;

[0126] 3. Cracking rate test: Select 100 dry, clean, and undamaged straw material samples, simulate actual application conditions, stretch, twist, and squeeze them 100 times each, and calculate the cracking rate of the samples.

[0127] The test results are shown in Table 1 below.

[0128] Table 1 Performance test

[0129] test Anti-mildew performance (grade) Compressive strength(MPa) Cracking rate (%) Example 1 5 14.6 1 Example 2 5 14.5 1 Example 3 5 14.3 2 Example 4 5 14.5 1 Comparative Example 1 4 13.6 3 Comparative Example 2 4 13.8 3 Comparative Example 3 3 13.3 4 Comparative Example 4 2 11.2 7 Comparative Example 5 1 9.5 11 Comparative Example 6 3 12.9 3

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A straw material processing process, characterized in that the steps include: (1) Using pest-free rice straw as raw material, removing impurities and dead leaves, and rinsing with water; (2) soaking in a potassium permanganate aqueous solution and then rinsing with water; (3) boiling the rice straw treated with potassium permanganate aqueous solution in a softener; The softener comprises potassium hydroxide, deionized water, ethanol and penetrant HY-5211 in a weight ratio of (6-8): (60-70): (20-30): (0.01-0.02); (4) soaking the straw treated with the softener in the strengthening agent, and then washing the strengthening agent remaining on the surface with clean water; (5) drying the rice straw treated with the enhancer in a dryer to a moisture content of 6-8%; The strengthening agent comprises the following raw materials in parts by weight: 20-30 parts of epoxy resin modified corn starch, 2-3 parts of 3-glycidyloxypropyltrimethoxysilane, 8-10 parts of acetone, 30-40 parts of deionized water and 10-15 parts of calcium carbonate; The preparation steps of the epoxy resin modified corn starch include: stirring and dispersing maleic anhydride in deionized water, adding sodium lauryl sulfate, stirring until dissolved, adding corn starch, and then adding epoxy resin E51, stirring for 1.5-2.5 hours at a temperature of 35-45° C. to obtain the epoxy resin modified corn starch; the weight ratio of maleic anhydride, deionized water, sodium lauryl sulfate, corn starch and epoxy resin is (1.5-2.5): (60-70): (6-8): (14-16): (30-40).

2. A straw material processing process according to claim 1, characterized in that: The rinsing time in step (1) is 10-15 minutes; the mass concentration of the potassium permanganate aqueous solution in step (2) is 0.5-1%, the soaking time is 2-3 hours, and the flushing time is 3-5 minutes.

3. A straw material processing process according to claim 1, characterized in that: The cooking time in step (3) is 1-2 hours.

4. A straw material processing process according to claim 1, characterized in that: The soaking time in step (4) is 3-5 hours.

5. A straw material processing process according to claim 1, characterized in that: The drying temperature in step (5) is 40-50°C.

6. A straw material processing process as claimed in any one of claims 1 to 5, applied in the preparation of bags.