Production process of black insect-proof mulching film paper

Abstract

The invention relates to the technical field of mulching film paper production, in particular to a production process of black insect-proof mulching film paper. The production process of the black insect-proof mulching film paper comprises the following steps: LOCC waste paper pulp, a pulper, a discharge pool, a pulping machine, a pulp forming pool, a forebay, a white water tank outside the machine, a slushing pump, a pressure screen, a headbox, a net part, a squeezing part, a pre-baking part, a sizing machine, a post-baking part, a coiling part, rewinding, and packaging and warehousing. The mulching film paper produced by using wood pulp fiber as a raw material is easy to degrade and does not cause environmental pollution; the black mulching film paper can preserve heat and moisture, promote the growth of crops and improve the yield. The formaldehyde component in the melamine formaldehyde resin can effectively inhibit and kill germs and pests generated in soil and in the growth process of crops, so that the healthy growth of the crops is ensured, and the harm to the crops, people and livestock is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mulch paper production, in particular to a production process of black insect-proof mulch paper. Background Art

[0002] Black plastic mulch is widely used in agricultural production, and its advantages are: 1. Black mulch can absorb sunlight, increase ground temperature, and is suitable for the growth of crops in the early stages of sowing; 2. Inhibit weed growth. After the black mulch is covered, weeds on the ground are difficult to grow due to insufficient light; 3. Retain moisture and fertilizer. The black mulch can prevent soil moisture from evaporating and increase soil moisture. At the same time, the black mulch can prevent rainwater from directly eroding the soil surface and prevent the loss of fertilizers and nutrients, thereby maintaining soil fertility; 4. Increase vegetable yields. Since the temperature of black mulch rises more slowly than that of white mulch, it is beneficial for some vegetables with low root soil temperature requirements, such as tomatoes, green beans, and late-maturing watermelons, which can significantly increase yields.

[0003] Black plastic mulch is made of polyethylene as the main raw material, with added antioxidants, UV absorbers, and black masterbatch. It is produced by a plastic film blowing machine for use in agricultural production. Its biggest disadvantage is its poor degradability. It takes 30-50 years to completely degrade, causing secondary pollution to the soil and hindering the subsequent growth of crops. Summary of the invention

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a production process of black insect-proof mulch paper, in which the black mulch paper made of plant fiber replaces the black plastic mulch, maintains the advantages of the black plastic mulch, and at the same time has good degradability, kills insects and bacteria, is environmentally friendly, and has broad application prospects.

[0005] The present invention is achieved by adopting the following technical solutions: The production process of the black insect-proof mulch paper comprises the following steps: LOCC waste paper pulp → pulper → unloading tank → pulper → pulping tank → pre-slurry tank → external white water tank → pulp pump → pressure screen → headbox → wire section → press section → front drying → sizing machine → back drying → take-up section → rewinding → packaging and storage; The chemical mechanical pulp is added in the unloading tank, and the pulp chemicals are added in the unloading tank. The pulp chemicals include direct sun-fast black, direct sun-fast lake blue, tannic acid and magnesium sulfate. Melamine formaldehyde resin and cationic cassava starch are added before the pulp pump in the pulping tank. The role of tannic acid: dye mordant, promoting the combination of dye and fiber; the role of magnesium sulfate: reducing the solubility of dye, which is conducive to retention on fiber; the role of melamine formaldehyde resin: improving the wet strength of black mulch paper, resisting rain erosion, and at the same time being able to kill bacteria and prevent insects; the role of cationic cassava starch: improving the retention rate of AKD and fine fibers in the pulp and the strength of the finished paper.

[0006] The pulp ratio is: 60-70% LOCC waste paper pulp + 40-30% chemical mechanical pulp; The pulp quality is: beating degree 30-35°SR, wet weight 3-4g.

[0007] AKD is added into the pulp before the flushing pump; CPAM retention aid is added before the pressure screen in front of the net; isothiazolinone fungicide is added into the paper machine pre-papermaking pool and the white water tank outside the machine; polyether defoamer is added into the white water tank outside the paper machine.

[0008] The role of AKD in pulp: improve the ability of paper to resist liquid invasion; the role of CPAM retention aid: improve the retention rate of AKD and fine fibers in pulp; the role of isothiazolinone fungicide: kill bacteria and microorganisms in the white water system to ensure the normal operation of the paper machine.

[0009] Polyether defoamer: 150-300g / ton of paper, adding location: in the white water tank outside the paper machine, function: to eliminate bubbles in the white water system and prevent paper defects.

[0010] The sizing machine is used for surface sizing, and the surface sizing formula includes: oxidized corn starch, surface AKD, cationic wax emulsion, glyoxal, matting powder, solid sizing intensifier and styrene-acrylate polymer.

[0011] The surface sizing implementation process comprises the following steps: Surface glue dissolving tank → surface glue cooking tank → surface glue dilution tank → surface glue storage tank → feeding tank → membrane transfer sizing machine; The surface sizing parameters are: starch concentration 10±1%, viscosity 25-50mPa·s.

[0012] The preparation process of the surface sizing is as follows: In the surface glue dissolving tank, add the formula amount of oxidized corn starch, the formula amount of solid sizing enhancer, and appropriate amount of water and pump them into the surface glue cooking tank. Stir evenly in the surface glue cooking tank, pass steam, and heat to 95±2℃, keep warm for 20±2min, and bring it to the surface glue dilution tank and mix it with the formula amount of surface AKD, cationic wax emulsion, glyoxal, matting powder, styrene-acrylate and appropriate amount of water to form surface glue, prepare a surface glue solution with a concentration of 10±1% and a viscosity of 25-50mpa·s, and bring it to the surface glue storage tank for standby use.

[0013] The role of oxidized corn starch: as a carrier of surface sizing agent; the role of surface AKD 3-5kg / ton paper: to improve the water resistance of the finished paper and resist rain erosion; the role of cationic wax emulsion 4-6kg / ton paper: to further improve the surface hydrophobicity of the finished paper; the role of glyoxal 3-5kg / ton paper: to cooperate with melamine formaldehyde resin to improve the wet strength of the finished paper; the role of matting powder 3-5kg / ton paper: to prevent ultraviolet rays and resist aging; model JJ-160; the role of solid sizing enhancer: to improve the water resistance of the finished paper; the role of styrene-acrylate polymer: to improve the waterproof and moisture-proof properties of the finished paper.

[0014] The pulping machine is 3 DD720 disc refiners connected in series, with a pulping concentration of 4-5%, a mill power of 400kw+360kw+360kw, and a pulping flow rate of 220-250m 3 / h.

[0015] The addition amounts of the chemicals in the pulp are: direct sun-fast black: 12-15kg / ton of paper; direct sun-fast lake blue: 3-5kg / ton of paper; tannic acid: 1-3kg / ton of paper; magnesium sulfate: 20-50kg / ton of paper; melamine formaldehyde resin: 40-50kg / ton of paper; cationic cassava starch: 10-20kg / ton of paper.

[0016] The amount of AKD added to the pulp is 15-20kg / ton of paper; the amount of CPAM retention agent added is 200-500g / ton of paper; the amount of isothiazolinone fungicide added is 100-300g / ton of paper; and the amount of polyether defoamer added is 150-300g / ton of paper.

[0017] In the surface sizing formula, the added amount of each raw material is: oxidized corn starch: 40-50kg / ton of paper; surface AKD: 3-5kg / ton of paper; cationic wax emulsion: 4-6kg / ton of paper; glyoxal: 3-5kg / ton of paper; matting powder: 3-5kg / ton of paper; solid sizing enhancer: 10-15kg / ton of paper; styrene-acrylate polymer: 3-5kg / ton of paper.

[0018] The production process of the black insect-proof mulch paper adopts 1880 long-wire multi-cylinder paper machine, with a basis weight of 80g / m 2 , machine speed 300-350m / min; web concentration 0.6-0.8%; lip opening 10-12mm; roller dryness 19-21%; first press line pressure 60-70kn / m; second press line pressure 110-130kn / m; third press line pressure 130-150kn / m; press dryness 45-47%; paper dryness before entering the immersion sizing machine 93-95%; paper dryness after leaving the immersion sizing machine 65-68%; immersion sizing machine line pressure 120-140kn / m; paper dryness 93-95%.

[0019] Compared with the prior art, the present invention has the following beneficial effects: (1) Ground mulch paper made from wood pulp fiber is easily degradable and will not cause environmental pollution; black ground mulch paper can keep warm and moisturize, promote crop growth and increase yield.

[0020] (2) The formaldehyde component in melamine formaldehyde resin can effectively inhibit and kill pathogens and pests produced in the soil and during the growth of crops, ensuring the healthy growth of crops without causing harm to crops, humans and animals.

[0021] (3) Use a special pigment formula to dye the paper black, reduce light, make it difficult for weeds to grow, and achieve the effect of black mulch.

[0022] (4) By using different chemical products, the water resistance and wet strength requirements of ground film paper can be achieved. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the present invention more clear, the present invention is further described in detail below.

[0024] The sources of the raw materials used in the following examples and comparative examples are: Direct sun-fast black: Jinan Longcai Chemical Co., Ltd.; Direct light-fast lake blue: Jinan Longcai Chemical Co., Ltd. Melamine formaldehyde resin: Weifang Tianfang Shenghong Chemical Co., Ltd.; Cationic cassava starch: Jiangxi Liuhe Chemical Industry Co., Ltd.; AKD in pulp: Weifang Tianfang Shenghong Chemical Co., Ltd.; CPAM retention aid K3400R: Kemira Chemical Co., Ltd. Isothiazolinone fungicide HL-15: Zhejiang Chuanhua Chemical Technology Co., Ltd.; Polyether defoamer 727: Jining Nantian Agricultural Science and Chemical Co., Ltd.; Oxidized corn starch: Jiangxi Liuhe Chemical Industry Co., Ltd.; Surface AKD: Weifang Tianfang Shenghong Chemical Co., Ltd.; Cationic wax emulsion MX-1218: Weifang Mingxiang Chemical Co., Ltd. Glyoxal: Shandong Dachuang Chemical Co., Ltd.; Matting powder JJ-160: Weifang Jiejia Chemical Co., Ltd. Solid sizing enhancer SY-GTJ6: Jinzhou Dacheng Modified Starch Co., Ltd.; Styrene-acrylate polymer: Weifang Tianfang Shenghong Chemical Co., Ltd. (the ingredient is cationic styrene-acrylate polymer).

[0025] Example 1 The production process of black insect-proof mulch paper includes the following steps: LOCC waste paper pulp → pulper → unloading tank → pulper → pulping tank → pre-papering tank → external white water tank → pulping pump → pressure screen → headbox → wire section → pressing section → front drying → sizing machine → back drying → winding section → rewinding → packaging and storage.

[0026] Pulp ratio: 60% LOCC waste paper pulp + 40% chemical mechanical pulp, Refining process: 3 DD720 disc mills in series, refining concentration 4%, mill power 400kw+360kw+360kw, refining flow 220m 3 / h, Pulp quality: beating degree 30°SR, wet weight 3g.

[0027] Chemicals in pulp Direct sun-fast black: 12kg / ton of paper, adding location: unloading tank, Direct light-fast lake blue: 3kg / ton of paper, adding location: unloading pool, Tannic acid: 1kg / ton of paper, adding location: unloading tank, Magnesium sulfate: 20kg / ton of paper, adding location: unloading tank, Melamine formaldehyde resin: 40kg / ton of paper, adding position: before the pulp pump in the pulping pool, Cationic cassava starch: 10kg / ton paper, adding location: before the pulp pump in the pulping pool, AKD in pulp: 15kg / ton of paper, adding position: before the flushing pump of the white water tank outside the machine, CPAM retention agent K3400R: 200g / ton paper, adding position: before the pressure screen before the net, Isothiazolinone fungicide HL-15: 100g / ton of paper, adding location: paper machine pre-papermaking pool and outside white water tank, Polyether defoamer 727: 150g / ton of paper, adding location: in the white water tank outside the paper machine.

[0028] Surface sizing formula: Oxidized corn starch 40kg / ton paper, Surface AKD3kg / ton paper, Cationic wax emulsion MX-1218: 4kg / ton of paper, Glyoxal 3kg / ton paper, Matting powder JJ-160: 3kg / ton paper, Solid sizing enhancer SY-GTJ6: 10kg / ton paper, Styrene-acrylate polymer 3kg / ton of paper.

[0029] (2) Surface sizing process Surface glue dissolving tank → surface glue cooking tank → surface glue dilution tank → surface glue storage tank → feeding tank → membrane transfer glue applicator.

[0030] Surface sizing parameters Starch concentration is 9%, viscosity is 25mPa·s.

[0031] Preparation process: In the surface glue dissolving tank, add the formulated amount of oxidized corn starch, the formulated amount of solid sizing enhancer and appropriate amount of water and pump them into the surface glue cooking tank, stir them evenly in the surface glue cooking tank, pass steam, and heat them to 93°C, keep them warm for 18 minutes, and bring them to the surface glue dilution tank and mix them with the formulated amount of surface AKD, cationic wax emulsion, glyoxal, matting powder, styrene-acrylate and appropriate amount of water to form surface glue, prepare a surface glue solution with a concentration of 9% and a viscosity of 25mPa·s, and bring them to the surface glue storage tank for standby use.

[0032] Paper machine technology: 1880 fourdrinier multi-cylinder paper machine, basis weight 80g / m 2 , machine speed 300m / min; web concentration 0.6%; lip opening 10mm; couch roll dryness 19%; first press line pressure 60kn / m; second press line pressure 110kn / m; third press line pressure 150kn / m; paper dryness out of pressing 45%; paper dryness before entering the immersion sizing machine 93%; paper dryness out of the immersion sizing machine 65%; immersion sizing machine line pressure 120kn / m; paper dryness 93%.

[0033] Example 2 The production process of black insect-proof mulch paper includes the following steps: LOCC waste paper pulp → pulper → unloading tank → pulper → pulping tank → pre-papering tank → external white water tank → pulping pump → pressure screen → headbox → wire section → pressing section → front drying → sizing machine → back drying → winding section → rewinding → packaging and storage.

[0034] Pulp ratio: 70% LOCC waste paper pulp + 30% chemical mechanical pulp, Refining process: 3 DD720 disc mills in series, refining concentration 5%, mill power 400kw+360kw+360kw, refining flow 250m 3 / h, Pulp quality: beating degree 35°SR, wet weight 4g.

[0035] Chemicals in pulp Direct sun-fast black: 15kg / ton of paper, adding location: unloading tank, Direct light-fast lake blue: 5kg / ton paper, adding location: unloading pool, Tannic acid: 3kg / ton of paper, adding location: unloading tank, Magnesium sulfate: 50kg / ton of paper, adding location: unloading tank, Melamine formaldehyde resin: 50kg / ton of paper, adding position: before the pulp pump in the pulping pool, Cationic cassava starch: 20kg / ton paper, adding location: before the pulp pump in the pulping pool, AKD in pulp 20kg / ton paper, adding position: before the flushing pump of the white water tank outside the machine, CPAM retention agent K3400R: 500g / ton paper, adding position: before the pressure screen before the net, Isothiazolinone fungicide HL-15: 300g / ton of paper, adding location: paper machine pre-papermaking pool and outside white water tank, Polyether defoamer 727: 300g / ton of paper, adding location: in the white water tank outside the paper machine, Surface sizing formula: Oxidized corn starch 50kg / ton paper, Surface AKD5kg / ton paper, Cationic wax emulsion MX-1218: 6kg / ton paper, Glyoxal 5kg / ton paper, Matting powder 5kg / ton paper, Solid sizing enhancer per ton of paper SY-GTJ6: 15kg / ton of paper, Styrene-acrylate polymer ton paper 5kg / ton paper, Surface sizing process Surface glue dissolving tank → Surface glue cooking tank → Surface glue dilution tank → Surface glue storage tank → Feeding tank → Film transfer sizing machine Surface sizing parameters Starch concentration is 11%, viscosity is 50mPa·s.

[0036] Preparation process: In the surface glue dissolving tank, add the formulated amount of oxidized corn starch, the formulated amount of solid sizing enhancer and appropriate amount of water and pump them into the surface glue cooking tank, stir them evenly in the surface glue cooking tank, pass steam, and heat them to 97°C, keep them warm for 22 minutes, and bring them to the surface glue dilution tank and mix them with the formulated amount of surface AKD, cationic wax emulsion, glyoxal, matting powder, styrene-acrylate and appropriate amount of water to form surface glue, prepare a surface glue solution with a concentration of 11% and a viscosity of 50 mPa·s, and bring them to the surface glue storage tank for standby use.

[0037] Paper machine technology: 1880 fourdrinier multi-cylinder paper machine, basis weight 80g / m 2, machine speed 350m / min; web concentration 0.6-0.8%; lip opening 12mm; roller dryness 21%; first press line pressure 70kn / m; second press line pressure 130kn / m; third press line pressure 150kn / m; press dryness 47%; paper dryness before entering the immersion sizing machine 95%; paper dryness after leaving the immersion sizing machine 68%; immersion sizing machine line pressure 140kn / m; paper dryness 95%.

[0038] Example 3 The production process of black insect-proof mulch paper includes the following steps: LOCC waste paper pulp → pulper → unloading tank → pulper → pulping tank → pre-papering tank → external white water tank → pulping pump → pressure screen → headbox → wire section → pressing section → front drying → sizing machine → back drying → winding section → rewinding → packaging and storage.

[0039] Pulp ratio: 65% LOCC waste paper pulp + 35% chemical mechanical pulp, Refining process: 3 DD720 disc mills in series, refining concentration 4.5%, mill power 400kw+360kw+360kw, refining flow 235m 3 / h, Pulp quality: beating degree 33°SR, wet weight 3.5g.

[0040] Chemicals in pulp Direct sun-fast black: 13kg / ton of paper, adding location: unloading tank, Direct light-fast lake blue: 4kg / ton paper, adding location: unloading pool, Tannic acid: 2kg / ton of paper, adding location: unloading tank, Magnesium sulfate: 35kg / ton of paper, adding location: unloading tank, Melamine formaldehyde resin: 45kg / ton of paper, adding location: before the pulp pump in the pulping pool, Cationic cassava starch: 15kg / ton paper, adding location: before the pulp pump in the pulping pool, AKD in pulp: 18kg / ton of paper, adding position: before the flushing pump of the white water tank outside the machine, CPAM retention agent K3400R: 350g / ton paper, adding position: before the pressure screen before the net, Isothiazolinone fungicide HL-15: 200g / ton of paper, adding location: paper machine pre-papermaking pool and outside white water tank, Polyether defoamer 727: 200g / ton of paper, adding location: in the white water tank outside the paper machine, Surface sizing formula: Oxidized corn starch 45kg / ton paper, Surface AKD4kg / ton paper, Cationic wax emulsion MX-1218: 5kg / ton paper, Glyoxal 4kg / ton paper, Matting powder JJ-160: 4kg / ton paper, Solid sizing enhancer SY-GTJ6: 12kg / ton paper, Styrene-acrylate polymer ton paper 4kg / ton paper, Surface sizing process Surface glue dissolving tank → Surface glue cooking tank → Surface glue dilution tank → Surface glue storage tank → Feeding tank → Film transfer sizing machine Surface sizing parameters Starch concentration is 10%, viscosity is 40mPa·s.

[0041] Preparation process: In the surface glue dissolving tank, add the formulated amount of oxidized corn starch, the formulated amount of solid sizing enhancer and appropriate amount of water and pump them into the surface glue cooking tank, stir them evenly in the surface glue cooking tank, pass steam, and heat them to 95°C, keep them warm for 20 minutes, and bring them to the surface glue dilution tank and mix them with the formulated amount of surface AKD, cationic wax emulsion, glyoxal, matting powder, styrene-acrylate and appropriate amount of water to form surface glue, prepare a surface glue solution with a concentration of 10% and a viscosity of 40mPa·s, and bring them to the surface glue storage tank for standby use.

[0042] Paper machine technology: 1880 fourdrinier multi-cylinder paper machine, basis weight 80g / m 2 , machine speed 330m / min; web concentration 0.7%; lip opening 11mm; couch roll dryness 20%; first press line pressure 69.5kn / m; second press line pressure 120kn / m; third press line pressure 140kn / m; press dryness 46%; paper dryness before entering the immersion sizing machine 94%; paper dryness after exiting the immersion sizing machine 66%; immersion sizing machine line pressure 130kn / m; paper dryness 94%.

[0043] Comparative Example 1: Direct sun-resistant black and lake blue are not added, and the other process flow is the same as that of Example 3.

[0044] Comparative Example 2: Tannic acid was not added, and the other process flow was the same as that of Example 3.

[0045] Comparative Example 3: No magnesium sulfate was added, and the other process flow was the same as that of Example 3.

[0046] Comparative Example 4: Melamine formaldehyde resin was not added, and other process flow was the same as that of Example 3.

[0047] Comparative Example 5: No surface AKD was added, and the other process flow was the same as that of Example 3.

[0048] Comparative Example 6: No cationic wax emulsion was added, and other process flow was the same as that of Example 3.

[0049] Comparative Example 7: Glyoxal was not added, and other process flow was the same as that of Example 3.

[0050] Comparative Example 8: No matting powder was added, and the other process flow was the same as that of Example 3.

[0051] Comparative Example 9: No solid sizing enhancer was added, and other process procedures were the same as those in Example 3.

[0052] Comparative Example 10: Styrene-acrylate was not added, and the other process flow was the same as that of Example 3.

[0053] The test data of Examples 1-3 and Comparative Examples 1-10 are shown in Table 1.

[0054] Table 1 Test data of Examples 1-3 and Comparative Examples 1-10 .

[0055] It can be seen from the above embodiments and comparative examples that: Comparative Example 1: Direct sun-fast black and lake blue are not added, which means that the L value of the blackness of the paper does not meet the requirements and has no light-shielding effect; Comparative Example 2: Tannic acid was not added, and the L value representing the blackness of the paper did not meet the requirements, and the shading effect was poor; Comparative Example 3: No magnesium sulfate was added, and the L value representing the blackness of the paper did not meet the requirements, and the shading effect was poor; Comparative Example 4: Without adding melamine formaldehyde resin, the wet strength and water absorption of the finished paper do not meet the requirements, and the effect of resisting rain erosion cannot be achieved; Comparative Example 5: No AKD was added to the surface, and the wet strength and water absorption of the finished paper did not meet the requirements, and the effect of resisting rain erosion could not be achieved; Comparative Example 6: Without adding the cationic wax emulsion, the wet strength and water absorption of the finished paper do not meet the requirements, and the effect of resisting rain erosion cannot be achieved; Comparative Example 7: Glyoxal was not added, and the wet strength of the finished paper did not meet the requirements; Comparative Example 8: No matting powder was added, and the light-shielding property of the finished paper was deviated; Comparative Example 9: Without adding the solid sizing enhancer, the wet strength and water absorption of the finished paper do not meet the requirements, and the effect of resisting rain erosion cannot be achieved; Comparative Example 10: Without adding styrene-acrylate, the water absorption of the finished paper is high and the water resistance is poor.

Claims

1. A production process for black insect-proof mulch paper, characterized in that: The following steps are involved: LOCC waste paper pulp → pulper → unloading tank → pulper → pulping tank → pre-slurry tank → external white water tank → pulp pump → pressure screen → headbox → wire section → press section → front drying → sizing machine → back drying → take-up section → rewinding → packaging and storage; Chemical mechanical pulp is added in the unloading tank, and pulp chemicals are added in the unloading tank. The pulp chemicals include direct sun-fast black, direct sun-fast lake blue, tannic acid and magnesium sulfate. Melamine formaldehyde resin and cationic cassava starch are added before the pulp pump in the pulping tank. The pulp ratio is: 60-70% LOCC waste paper pulp + 40-30% chemical mechanical pulp; The pulp quality is: beating degree 30-35°SR, wet weight 3-4g.

2. The production process of black insect-proof mulch paper according to claim 1, characterized in that: AKD is added into the pulp before the flushing pump; CPAM retention aid is added before the pressure screen in front of the net; isothiazolinone fungicide is added into the paper machine pre-papermaking pool and the white water tank outside the machine; polyether defoamer is added into the white water tank outside the paper machine.

3. The production process of black insect-proof mulch paper according to claim 1, characterized in that: The sizing machine is used for surface sizing, and the surface sizing formula includes: oxidized corn starch, surface AKD, cationic wax emulsion, glyoxal, matting powder, solid sizing intensifier and styrene-acrylate polymer.

4. The production process of black insect-proof mulch paper according to claim 3, characterized in that: The surface sizing implementation process comprises the following steps: Surface glue dissolving tank → surface glue cooking tank → surface glue dilution tank → surface glue storage tank → feeding tank → membrane transfer sizing machine; The surface sizing parameters are: starch concentration 10±1%, viscosity 25-50mpa·s.

5. The production process of black insect-proof mulch paper according to claim 4, characterized in that: The preparation process of the surface sizing is as follows: Dilute the formulated amount of oxidized corn starch and the formulated amount of solid sizing enhancer in the surface glue dissolving tank with water, stir evenly in the surface glue cooking tank, pass steam, and heat to 95±2℃, keep warm for 20±2min, bring to the surface glue dilution tank, mix with the formulated amount of surface AKD, cationic wax emulsion, glyoxal, matting powder, styrene-acrylate and appropriate amount of water to form surface glue, prepare a surface glue solution with a concentration of 10±1% and a viscosity of 25-50mPa·s, and bring to the surface glue storage tank for standby use.

6. The production process of black insect-proof mulch paper according to claim 1, characterized in that: The pulping machine is 3 DD720 disc refiners connected in series, with a pulping concentration of 4-5%, a mill power of 400kw+360kw+360kw, and a pulping flow rate of 220-250m 3 / h.

7. The production process of black insect-proof mulch paper according to claim 1, characterized in that: The addition amount of the chemicals in the pulp is: direct sun-fast black: 12-15kg / ton of paper; direct sun-fast lake blue: 3-5kg / ton of paper; Tannic acid: 1-3kg / ton of paper; Magnesium sulfate: 20-50kg / ton of paper; melamine formaldehyde resin: 40-50kg / ton of paper; cationic cassava starch: 10-20kg / ton of paper.

8. The production process of black insect-proof mulch paper according to claim 2, characterized in that: The amount of AKD added to the pulp is 15-20kg / ton of paper; the amount of CPAM retention agent added is 200-500g / ton of paper; the amount of isothiazolinone fungicide added is 100-300g / ton of paper; and the amount of polyether defoamer added is 150-300g / ton of paper.

9. The production process of black insect-proof mulch paper according to claim 3, characterized in that: In the surface sizing formula, the addition amount of each raw material is: oxidized corn starch: 40-50kg / ton of paper; surface AKD: 3-5kg / ton of paper; cationic wax emulsion: 4-6kg / ton of paper; Glyoxal: 3-5kg / ton of paper; Matting powder: 3-5kg / ton of paper; Solid sizing enhancer: 10-15kg / ton of paper; Styrene-acrylate polymer: 3-5kg / ton of paper.

10. The production process of black insect-proof mulch paper according to claim 1, characterized in that: Produced on 1880 fourdrinier multi-cylinder paper machine, basis weight 80g / m 2 , machine speed 300-350m / min; web concentration 0.6-0.8%; lip opening 10-12mm; roller dryness 19-21%; first press line pressure 60-70kn / m; second press line pressure 110-130kn / m; third press line pressure 130-150kn / m; press dryness 45-47%; paper dryness before entering the immersion sizing machine 93-95%; paper dryness after leaving the immersion sizing machine 65-68%; immersion sizing machine line pressure 120-140kn / m; paper dryness 93-95%.