Highly adhesive regenerated cellulose film and method for producing the same

Abstract

The application discloses a high-adhesion-resistance regenerated cellulose film and a preparation method thereof, and belongs to the technical field of regenerated cellulose film production, and comprises the following steps: viscose preparation, film regeneration, washing, desulfurization, bleaching, and obtaining a wet film after washing; the wet film is subjected to softening and anti-adhesion coating treatment; and the regenerated cellulose film is prepared through drying and humidity adjustment; the anti-adhesion agent used in the anti-adhesion coating treatment comprises a composition of one or more of modified starch suspension, cellulose micro-powder suspension and wax emulsion; the modified starch suspension is selected from any one of oxidized starch, hydroxypropyl starch, hydroxypropyl oxidized starch, acetylated starch and cationic starch; and the wax emulsion is selected from any one of palm wax emulsion, paraffin wax emulsion, PE wax emulsion, PP wax emulsion, Fischer-Tropsch wax emulsion and composite wax emulsion. In the application, the anti-adhesion agent is combined with the surface of the wet film, the adhesion effect is improved, and the generation of powder dropping is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of regenerated cellulose membrane production technology, specifically to a high anti-adhesion regenerated cellulose membrane and its preparation method. Background Technology

[0002] Regenerated cellulose membrane is a fully biodegradable green film material made from natural cellulose through adhesive or solvent methods, followed by molding, regeneration, washing, desulfurization, bleaching, softening, anti-adhesion, and drying. Due to its high light transmittance, good air permeability, printability, and environmental friendliness, it is widely used in food packaging, tobacco packaging, gift packaging, labeling, and specialty packaging. However, due to the material's chemical structure, surface properties, production process, and storage environment, regenerated cellulose membrane is prone to layer-to-layer adhesion during finished product winding, storage, transportation, and subsequent processing. Adding anti-adhesion agents to the surface system and constructing an anti-adhesion functional barrier is essential to ensure the stability and usability of the film throughout the entire process from production to end-use. Adding anti-adhesion agents to the system to achieve anti-adhesion is not a process optimization but a necessary technical means for the industrial production and market application of regenerated cellulose membrane. Its necessity is reflected in multiple dimensions, including the material's intrinsic properties, production process, processing performance, product quality, storage and transportation, and application scenarios.

[0003] Currently, commonly used anti-blocking agents for regenerated cellulose membranes are mostly silica emulsions with different ionic properties. However, while silica emulsion-based anti-blocking agents can improve the surface adhesion problem of regenerated cellulose membranes to a certain extent, they have drawbacks such as easy crystallization, easy powdering, poor appearance, weak process stability, and easy degradation at high temperature and humidity, making it difficult to meet the requirements of high-end transparent packaging, high-speed processing, and food-grade safety.

[0004] In view of the problems existing in the prior art, the present invention, combining years of design and use experience in related fields, designs a high anti-adhesion regenerated cellulose membrane and its preparation method to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a high-anti-adhesion regenerated cellulose membrane and its preparation method. The modified starch suspension, cellulose micro-powder suspension, and wax emulsion selected can combine with the cellulose surface, effectively avoiding the generation of powder shedding. This effectively avoids product quality defects caused by powder shedding, making it more suitable for high-end printing and lamination. At the same time, when applied to food and pharmaceutical packaging, it can also more effectively prevent product contamination due to powder, resulting in higher product safety for consumption.

[0006] To achieve the above objectives, the present invention provides a method for preparing a highly adhesive regenerated cellulose membrane, comprising the following steps: (1) Viscose preparation: viscose stock solution was prepared using cotton pulp and wood pulp as raw materials; (2) Film regeneration: The adhesive solution is injected into the film forming machine to generate a film; (3) Post-treatment: The film is washed with water, desulfurized, bleached, and then washed with water to obtain a wet film; (4) Coating treatment: softening and anti-sticking coating treatment is applied to the wet film; (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The anti-adhesion agent used in the anti-adhesion coating treatment is one or more of the following: modified starch suspension, cellulose micro powder suspension, and wax emulsion. The modified starch suspension is selected from any one of oxidized starch suspension, hydroxypropyl starch suspension, hydroxypropyl oxidized starch suspension, acetylated starch suspension, and cationic starch suspension. The cellulose micropowder suspension is selected from any one of microcrystalline cellulose suspension, cellulose micropowder suspension, cellulose microsphere suspension, cellulose nanocrystal suspension, and cellulose microfiber suspension. The wax emulsion is selected from any one of palm wax emulsion, paraffin wax emulsion, PE wax emulsion, PP wax emulsion, and Fischer-Tropsch wax emulsion.

[0007] Preferably, the coating amount of the anti-adhesive is ≤2.5g / m 2 .

[0008] Preferably, the coating amount of the modified starch suspension is 0.3-1.5 g / m³. 2 ; The coating amount of the cellulose micron suspension is 0.2-0.8 g / m³. 2 ; The coating amount of the wax emulsion is 0.15-0.8 g / m.

[0009] Preferably, the mass concentration of the modified starch suspension is 0.5-4%; The mass concentration of the cellulose micropowder suspension is 0.2-0.8%; The mass concentration of the wax emulsion is 0.1-2%.

[0010] Preferably, the particle size of the cellulose micropowder compound in the cellulose micropowder suspension is ≤20μm.

[0011] Preferably, in step (3), the surface temperature of the wet film is 30-70℃ and the water content is 100%-200%.

[0012] Preferably, in step (4), the anti-stick coating temperature on the wet film is 30-70℃.

[0013] Preferably, the water content of the regenerated cellulose membrane in step (5) is 5-10%.

[0014] Preferably, the drying temperature in step (5) is 90-140℃.

[0015] The present invention also provides a highly adhesive regenerated cellulose membrane prepared by the above preparation method.

[0016] The advantages of this invention are: 1. This invention uses modified starch suspension, cellulose micron powder suspension, and wax emulsion as anti-adhesion agents, while controlling the temperature and humidity of the wet film to allow them to bond with the wet film surface. This improves the adhesion effect while ensuring the transparency of the regenerated cellulose film, effectively avoiding powder shedding. It is more suitable for high-end printing and lamination, and the products are safer for consumption. It solves the drawbacks of inorganic silicon materials, such as easy crystallization, weak process stability affected by ionic properties, and easy degradation at high temperature and humidity, and better meets the needs of high-end transparent packaging and high-speed processing. Attached Figure Description

[0017] Figure 1 The image shows the powder shedding of the regenerated cellulose membranes prepared in Example 1 (left) and Comparative Example 1 (right) of this invention. Detailed Implementation

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to specific embodiments.

[0019] This invention provides a method for preparing a highly adhesive regenerated cellulose membrane, comprising the following steps: (1) Viscose preparation: viscose stock solution was prepared using cotton pulp and wood pulp as raw materials; (2) Film regeneration: The adhesive solution is injected into the film forming machine to generate a film; (3) Post-treatment: The film is washed with water, desulfurized, bleached, and then washed again to obtain a wet film. The surface temperature of the wet film is 30-70℃ and the water content is 100%-200%. (4) Coating treatment: softening and anti-sticking coating treatment is applied to the wet film; (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The water content of the regenerated cellulose film is 5-10%, and the drying temperature is 90-140℃. The anti-sticking agent used in the anti-sticking coating treatment of this invention is one or more of the following: modified starch suspension, cellulose micropowder suspension, and wax emulsion. The modified starch suspension is selected from any one of oxidized starch suspension, hydroxypropyl starch suspension, hydroxypropyl oxidized starch suspension, acetylated starch suspension, and cationic starch suspension; the cellulose micropowder suspension is selected from any one of microcrystalline cellulose suspension, cellulose micropowder suspension, cellulose microsphere suspension, cellulose nanocrystal suspension, and cellulose microfiber suspension; the wax emulsion is selected from any one of palm wax emulsion, paraffin wax emulsion, PE wax emulsion, PP wax emulsion, and Fischer-Tropsch wax emulsion, and the pH of the anti-sticking agent working solution is 7-10.

[0020] In step (4), the anti-sticking agent is applied to the wet film surface using an online coating method. The online coating method can be different forms such as dip coating, spray coating, roller coating, and curtain coating.

[0021] The softening agent used in the softening step is a conventional softening agent in the art, which can be selected from one or more of glycerol aqueous solution, diethylene glycol aqueous solution, and triethylene glycol aqueous solution. The concentration of the softening agent is 30-100 g / L, and the dosage is 80-240 kg / ton of film. In this invention, the softening and anti-adhesion step in step 4 can be performed simultaneously, that is, the softening agent and the anti-adhesion agent are mixed evenly and coated onto the regenerated cellulose membrane together, or the softening impregnation can be performed first, followed by the anti-adhesion agent coating. The coating temperature is 30-70℃. During the use of the anti-adhesion agent, excessive coating can easily lead to increased haze, powdering, or decreased adhesion, while insufficient coating can result in poor anti-adhesion performance. In this invention, the coating amount of modified starch suspension is limited to ≤2.5 g / m³. 2 More preferably, it is 0.3-1.5 g / m 2 The dosage is 4.0-7.0 kg / ton of membrane. The coating amount of the cellulose micronized suspension is ≤2.0 g / m³. 2 Further preferably, it is 0.2-0.8 g / m 2 The dosage is 3.0-5.0 kg / ton of film. The coating amount of the wax emulsion is ≤2.0 g / m³. 2 More preferably, it is 0.15-0.8 g / m 2 The dosage is 2.0-4.0 kg / ton of film to improve the effectiveness of the anti-adhesion agent.

[0022] This invention uses cotton pulp and wood pulp as raw materials. A viscose stock solution is prepared through alkalization, pressing, aging, yellowing, dissolving, maturation, filtration, and defoaming processes. The viscose stock solution is then pumped into a film forming device via a viscose metering pump. The forming device generates a film, which is then washed and placed in a desulfurization tank for desulfurization. After desulfurization, the film is bleached and dehydrated in a bleaching tank to obtain a wet film, which is then softened and de-adhesive treated. The raw material selection, viscose preparation, cellulose regeneration, washing, desulfurization, and bleaching are all well-known production processes in the art, and the raw materials used in production are also well-known in actual production.

[0023] The modified starch suspension in this invention has a concentration of 0.5-4% (w / w) and is prepared by adding modified starch to deionized water and gelatinizing at 70-90℃ for 20-40 min. The degree of substitution of the oxidized starch is 0.03-0.06, and the carboxyl content is 0.8-1.6%. The degree of substitution of hydroxypropyl starch is preferably 0.05-0.09, the degree of substitution of hydroxypropyl oxidized starch is preferably 0.06-0.11, the degree of substitution of acetylated starch is preferably 0.05-0.09, and the cationic starch is a quaternary ammonium cationic starch with a degree of substitution of 0.04-0.06. The concentration of the cellulose micropowder suspension is 0.2-0.8% (w / w) and is prepared by adding the cellulose micropowder compound to deionized water at room temperature and dispersing for 15-20 min. The particle size of the cellulose micropowder compound is ≤20 μm. When the anti-adhesion agent is a combination of a cellulose micron powder suspension and a modified starch suspension, the mass ratio of the cellulose micron powder compound in the cellulose micron powder suspension to the modified starch in the modified starch suspension is 1:1.5-1:3. The concentration of the wax emulsion is 0.1-2% (w / w), more preferably 0.1-0.5% (w / w), and it is prepared by conventional emulsification. This invention achieves anti-film adhesion and avoids powder shedding while reducing the impact on the transparency of the regenerated cellulose membrane by controlling the concentration of the anti-adhesion agent and the particle size of the cellulose micron powder compound as an anti-adhesion agent.

[0024] This invention controls the temperature and humidity of the wet film during the application of the anti-adhesion agent, ensuring good adhesion between the anti-adhesion agent and the wet film surface. Both regenerated cellulose and starch contain a large number of hydroxyl groups (-OH). After oxidation, esterification, or etherification modification, starch gains carboxyl, aldehyde, and hydrophobic ester groups, which can form dense hydrogen bonds with the cellulose hydroxyl groups, firmly anchoring at the regenerated cellulose film interface and preventing detachment. Under weakly alkaline conditions, the cations of cationic starch attract the anions on the cellulose surface, rapidly fixing them onto the regenerated cellulose film. Simultaneously, modified starch suspensions, cellulose micropowder suspensions, and wax emulsions can penetrate the micropores on the surface of the regenerated cellulose film, utilizing their film-forming capabilities to create a "locking effect" after drying, enhancing adhesion. This effectively avoids product quality defects caused by powder shedding, making it more suitable for high-end printing and providing higher safety for pharmaceutical packaging and food products. It also solves the drawbacks of inorganic silicon materials, such as easy crystallization, weak process stability affected by ionic properties, and easy degradation at high temperature and humidity, and better meets the needs of high-end transparent packaging and high-speed processing. After the regenerated cellulose film made by this invention is rolled up, the film layers form a stable interlayer structure by means of an anti-adhesion isolation layer, and the film layers will not stick together. Specific embodiments are as follows:

[0025] Unless otherwise specified, the experimental methods used in this invention are all conventional methods, and the materials and reagents used are all commercially available unless otherwise specified. Example 1

[0026] In this embodiment, the anti-adhesion agent is a 1.5% (w / w) oxidized starch solution, which is prepared by adding oxidized starch (DS = 0.05) to deionized water and gelatinizing it at 70°C for 40 minutes. A method for preparing a highly adhesive regenerated cellulose membrane includes the following steps: (1) Viscose preparation: 20% cotton pulp and 80% wood pulp by weight were selected and viscose stock solution was prepared by alkalization, pressing, aging, yellowing, dissolving, maturing, filtration and degassing. (2) Film regeneration: The adhesive solution is then pumped into the film forming machine through the adhesive metering pump to generate a film. (3) Post-treatment: The film is placed in a water washing tank for washing, then put into a desulfurization tank for desulfurization, and then transferred to a bleaching tank for bleaching. After washing, a wet film is obtained with a film surface temperature of 35℃ and a water content of 200%. (4) Coating treatment: The wet film is introduced into a softening bath for softening. The softener is an aqueous glycerol solution with a concentration of 50 g / L and a dosage of 130 kg / ton of film. Then, anti-stick coating is carried out. At 35°C, 1.5% (w / w) of oxidized starch solution is coated on both sides of the wet film, with a coating amount of 2.5 g / m².

[0027] (5) Drying and humidification: After drying and humidification, the coated film is used to obtain the regenerated cellulose film. The water content of the regenerated cellulose film is 10%, and the drying temperature is 100℃. Figure 1 The left side shows the powder shedding situation of the regenerated cellulose membrane prepared in this embodiment. Example 2

[0028] In this embodiment, the anti-adhesion agent is a 1.0% (w / w) hydroxypropyl starch solution, which is prepared by adding hydroxypropyl starch (DS = 0.06) to deionized water and gelatinizing it at 85°C for 30 minutes. A method for preparing a highly adhesive regenerated cellulose membrane includes the following steps: (1) Viscose preparation: 50% cotton pulp and 50% wood pulp by weight are selected and processed through alkalization, pressing, aging, yellowing, dissolving, maturing, filtration and degassing to produce viscose stock solution; (2) Film regeneration: The adhesive solution is then pumped into the film forming machine through the adhesive metering pump to generate a film. (3) Post-treatment: The film is placed in a water washing tank for washing, then put into a desulfurization tank for desulfurization, and then transferred to a bleaching tank for bleaching. After washing, a wet film is obtained with a film surface temperature of 55℃ and a water content of 150%. (4) Coating treatment: The wet film is simultaneously softened and anti-adhesion treated. A mixture of softener and anti-adhesion agent is coated on both sides of the wet film at 50°C. The softener is a 50 g / L glycerol aqueous solution, and the dosage is 150 kg / ton of film. The anti-adhesion agent is a 1.0% (w / w) hydroxypropyl starch solution, and the coating amount is 0.3 g / m². (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The water content of the regenerated cellulose film is 8%, and the drying temperature is 120℃. Example 3

[0029] In this embodiment, the anti-adhesion agent is a 4% (w / w) acetylated starch solution, which is prepared by adding acetylated starch (DS = 0.07) to deionized water and gelatinizing it at 90°C for 20 minutes. A method for preparing a highly adhesive regenerated cellulose membrane includes the following steps: (1) Viscose preparation: 80% cotton pulp and 20% wood pulp by weight were selected and viscose stock solution was prepared by alkalization, pressing, aging, yellowing, dissolving, maturing, filtration and degassing. (2) Film regeneration: The adhesive solution is then pumped into the film forming machine through the adhesive metering pump to generate a film. (3) Post-treatment: The film is placed in a water washing tank for washing, then put into a desulfurization tank for desulfurization, and then transferred to a bleaching tank for bleaching. After washing, a wet film is obtained with a film surface temperature of 60℃ and a water content of 100%. (4) Coating compound solution: The wet film is introduced into the softening bath for softening. The softener is a 75 g / L triethylene glycol aqueous solution, and the dosage is 140 kg / ton film. Then it is introduced into the anti-sticking bath. At 70°C, the wet film is coated with 4% (w / w) acetylated starch solution on both sides, and the coating amount is 1.5 g / m². (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The water content of the regenerated cellulose film is 5%, and the drying temperature is 140℃. Example 4

[0030] In this embodiment, the anti-adhesion agent is a mixture of 0.5% (w / w) microcrystalline cellulose suspension and 1.0% (w / w) oxidized starch suspension. It is prepared by adding microcrystalline cellulose and oxidized starch (DS = 0.04) in a mass ratio of 1:2 to deionized water at room temperature and dispersing for 120 min. The microcrystalline cellulose has a particle size of 5 μm. A method for preparing a highly adhesive regenerated cellulose membrane includes the following steps: (1) Viscose preparation: 50% cotton pulp and 50% wood pulp by weight are selected and processed through alkalization, pressing, aging, yellowing, dissolving, maturing, filtration and degassing to produce viscose stock solution; (2) Film regeneration: The adhesive solution is then pumped into the film forming machine through the adhesive metering pump to generate a film. (3) Post-treatment: The film is placed in a water washing tank for washing, then put into a desulfurization tank for desulfurization, and then transferred to a bleaching tank for bleaching. After washing, a wet film is obtained with a film surface temperature of 55℃ and a water content of 150%. (4) Coating treatment: The wet film is introduced into the softening bath for softening. The softener is diethylene glycol with a concentration of 80 g / L and a dosage of 160 kg / ton of film. Then, anti-stick coating is carried out. The anti-stick agent is coated on both sides of the wet film at 50°C with a coating amount of 0.8 g / m². (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The water content of the regenerated cellulose film is 8%, and the drying temperature is 120℃. Example 5

[0031] In this embodiment, the anti-adhesion agent is a 0.1% (w / w) PE wax float.

[0032] A method for preparing a highly adhesive regenerated cellulose membrane includes the following steps: (1) Viscose preparation: 50% cotton pulp and 50% wood pulp by weight are selected and processed through alkalization, pressing, aging, yellowing, dissolving, maturing, filtration and degassing to produce viscose stock solution; (2) Film regeneration: The adhesive solution is then pumped into the film forming machine through the adhesive metering pump to generate a film. (3) Post-treatment: The film is placed in a water washing tank for washing, then put into a desulfurization tank for desulfurization, and then transferred to a bleaching tank for bleaching. After washing, a wet film is obtained with a film surface temperature of 55℃ and a water content of 150%. (4) Coating treatment: The wet film is introduced into a softening bath for softening. The softener is diethylene glycol with a concentration of 80 g / L and a dosage of 160 kg / ton of film. Then, anti-stick coating is carried out. 0.1% (w / w) of PE wax emulsion is coated on both sides of the wet film at 50°C with a coating amount of 0.5 g / m². (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The water content of the regenerated cellulose film is 8%, and the drying temperature is 120℃.

[0033] Comparative Example 1 The comparative example prepared a regenerated cellulose membrane according to the steps of Example 1, except that the anti-adhesion agent in this comparative example was an aqueous solution of silica sol with a silica content of 5.0 g / L. Figure 1 The right side shows the powder shedding situation of the regenerated cellulose membrane prepared in this comparative example.

[0034] Comparative Example 2 The comparative example prepared a regenerated cellulose membrane according to the method of Example 1, except that the anti-adhesive in the comparative example was a cross-linked starch suspension with 1.5% (w / w) cross-linked starch and the sedimentation volume of the cross-linked starch was 1.5 mL.

[0035] Comparative Example 3 The regenerated cellulose membrane was prepared according to the steps of Example 1, except that the amount of anti-adhesive coating in step (4) was 3.0 g / m².

[0036] Performance testing: The testing standards for the performance indicators of the product obtained by this invention are as follows: the anti-sticking performance is tested according to the test method for anti-sticking in Appendix A of GB / T 22871-2008 Ordinary Cellophane; The powder shedding situation was assessed by visual inspection: at room temperature, the pressure of the hand on the regenerated cellulose membrane was controlled at 1.5±0.5N. While maintaining the pressure, the fingers were touched back and forth on the surface of the regenerated cellulose membrane for 10 seconds, and the powder shedding situation was observed.

[0037] The anti-sticking properties and powder shedding of Examples 1-5 and Comparative Examples 1-3 were measured, as shown in Table 1.

[0038] Table 1. Anti-sticking properties and powder shedding of regenerated cellulose membranes

[0039] As shown in Table 1, the regenerated cellulose membranes prepared in Examples 1-5 of this invention showed no adhesion at 70% RH and exhibited virtually no powder shedding. Compared to Comparative Example 1, Example 1 demonstrates that, unlike conventional silica anti-adhesive agents which exhibit powder shedding, the anti-adhesive agent in this invention firmly anchors at the interface of the regenerated cellulose membrane and is not easily detached. Comparing Example 1 with Comparative Examples 2 and 3, Example 1 shows that the regenerated cellulose membranes prepared under the anti-adhesive agent and coating amount conditions of this invention form a stable interlayer structure between membrane layers thanks to the anti-adhesive separator layer, and the layers do not adhere to each other at 70% RH. When the anti-adhesive coating amount exceeds 2.5 g / m², it significantly affects the haze of the regenerated cellulose membrane, reducing it below 90%. This indicates that within the coating amount range of this invention, anti-adhesion between membrane layers can be achieved while avoiding impact on haze.

[0040] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention. Furthermore, it should be understood that after reading the technical description of this invention, those skilled in the art can make various alterations, modifications, and / or variations to the invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A method for preparing a highly adhesive regenerated cellulose membrane, characterized in that, Includes the following steps: (1) Viscose preparation: viscose stock solution was prepared using cotton pulp and wood pulp as raw materials; (2) Film regeneration: The adhesive solution is injected into the film forming machine to generate a film; (3) Post-treatment: The film is washed with water, desulfurized, bleached, and then washed with water to obtain a wet film; (4) Coating treatment: softening and anti-sticking coating treatment is applied to the wet film; (5) Drying and humidification: After the coated film is dried and humidified, the regenerated cellulose film is obtained. The anti-adhesion agent used in the anti-adhesion coating treatment is one or more of the following: modified starch suspension, cellulose micro powder suspension, and wax emulsion. The modified starch suspension is selected from any one of oxidized starch suspension, hydroxypropyl starch suspension, hydroxypropyl oxidized starch suspension, acetylated starch suspension, and cationic starch suspension. The cellulose micropowder suspension is selected from any one of microcrystalline cellulose suspension, cellulose micropowder suspension, cellulose microsphere suspension, cellulose nanocrystal suspension, and cellulose microfiber suspension. The wax emulsion is selected from any one of palm wax emulsion, paraffin wax emulsion, PE wax emulsion, PP wax emulsion, and Fischer-Tropsch wax emulsion.

2. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, The coating amount of the anti-adhesive is ≤2.5g / m². 2 .

3. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 2, characterized in that, The coating amount of the modified starch suspension is 0.3-1.5 g / m³. 2 ; The coating amount of the cellulose micron suspension is 0.2-0.8 g / m³. 2 ; The coating amount of the wax emulsion is 0.15-0.8 g / m³. 2 .

4. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, The particle size of the cellulose micropowder compounds in the cellulose micropowder suspension is ≤20μm.

5. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, The modified starch suspension has a mass concentration of 0.5-4.0%; The mass concentration of the cellulose micropowder suspension is 0.2-0.8%; The mass concentration of the wax emulsion is 0.1-2%.

6. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, The wet film surface temperature in step (3) is 30-70℃ and the water content is 100%-200%.

7. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, In step (4), the anti-stick coating temperature on the wet film is 30-70℃.

8. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, The water content of the regenerated cellulose membrane in step (5) is 5-10%.

9. The method for preparing a high-anti-adhesion regenerated cellulose membrane according to claim 1, characterized in that, The drying process in step (5) involves a drying temperature of 90-140℃.

10. A highly anti-adhesive regenerated cellulose membrane, characterized in that, It is prepared by the method described in any one of claims 1-9.

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