High-strength anti-static carrier belt base paper and preparation process thereof

Abstract

The application belongs to the technical field of special papermaking and carrier tape preparation, and particularly relates to a high-strength anti-static carrier tape base paper and a preparation process thereof, and the preparation method comprises the following steps: step 1, TEMPO-oxidized nanocellulose suspension A is obtained by an oxidation method; step 2, mixed pulp B is obtained by beating treatment; step 3, suspension pulp system C is obtained by adding the suspension A and carboxylated carbon nanotubes; and the carrier tape base paper is obtained by homogenization, dehydration, pressing, dehydration and vacuum drying. The application proposes a new method for preparing the high-strength anti-static carrier tape base paper by TEMPO-oxidized nanofiber reinforcement, carboxylated carbon nanotube regulation of conductive performance and vacuum hot-press drying, the method solves the problems of weak strength, low interlayer bonding strength and non-anti-static property by TEMPO-oxidized nanocellulose crosslinking and carboxylated carbon nanotube regulation of conductive performance, and provides the high-strength anti-static carrier tape base paper and the preparation process thereof.

Description

Technical Field

[0001] This invention belongs to the technical field of special papermaking and carrier paper cross-technology, and specifically relates to a high-strength antistatic carrier paper and its preparation process. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Carrier paper is a special paper material used for packaging electronic components. It serves both to protect these components during transport and for indexing and positioning. With the miniaturization of integrated circuits and the trend towards miniaturization of electronic components—transistors, resistors, capacitors, etc.—the demand for carrier paper is becoming increasingly urgent and stringent, requiring miniaturization, high precision, high performance, and functionality. Carrier paper is classified into embossed carrier paper and stamped carrier paper according to its forming process. Embossed carrier paper is formed by creating local cavities through die-printing, while stamped carrier paper is formed by punching to create semi-penetrating cavities. Generally, paper carrier paper is favored by the market due to its advantages such as no chamfering during perforation, easy static elimination, good resilience, and low cost.

[0004] Carrier paper used for packaging and transporting electronic components generally requires minimal thickness fluctuation, no delamination, high strength, and resistance to water and moisture to avoid problems such as easy breakage of the carrier tape and easy shedding of fiber dust. For example, the thickness should be 0.35-1.2mm, and the internal bond strength should be >150J / m. 2 The smoothness is >500s. Patent CN1629401A adds rosin filler to the middle layer to produce a carrier paper with minimal thickness variation that does not affect operational efficiency; Patent CN1593910A introduces styrene-acrylic resin to avoid paper layer damage during carrier paper peeling; Patent CN118420944A introduces nanocellulose and multi-walled carbon nanotubes to improve interlayer bonding and antistatic effect. However, due to the limited bonding strength of cellulose fibers in paper, problems such as weak interlayer bonding, low precision in antistatic control, and difficulty in introducing functional components often exist. Summary of the Invention

[0005] The purpose of this invention is to provide a high-strength antistatic carrier paper and its preparation process. By introducing functional adhesive components TEMPO oxidized nanocellulose and carboxylated carbon nanotubes, the problems of insufficient strength, weak interlayer bonding, and lack of antistatic properties of existing carrier papers can be solved.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a process for preparing high-strength antistatic carrier paper, comprising: Preparation of TEMPO-oxidized cellulose nanoparticle suspension; Chemical softwood pulp and mechanical softwood pulp are pre-treated by pulping, mixed, and then loosened to obtain a mixed pulp. Add TEMPO-oxidized cellulose nanoparticles and carboxylated carbon nanotubes to the mixed slurry, and then decompose again to obtain a mixed suspension slurry system; The hybrid suspension slurry system is then used to make base paper, which is obtained by processing the mixed suspension slurry system into base paper.

[0007] In some embodiments, the method for preparing the TEMPO-oxidized cellulose nanoparticle suspension includes: Cellulose fibers were diluted with water to form a suspension. TEMPO, sodium bromide and sodium hypochlorite were added, and the pH was adjusted to 10.4-10.6 before the reaction was carried out. After the reaction was completed, the suspension was washed until neutral, homogenized under high pressure, and TEMPO was used to oxidize the nanocellulose suspension.

[0008] In some embodiments, the ratio of TEMPO, sodium bromide, and sodium hypochlorite is 0.010–0.015 g: 0.05–0.10 g: 4–5 mmol.

[0009] Softwood pulp contains long, fine fibers with fewer impurities, resulting in carrier paper with good flexibility, high folding endurance, and excellent tensile strength. Chemical pulp, prepared through chemical methods, has relatively ideal fiber length and excellent paper-forming properties. Mechanical pulp, prepared through mechanical action, has high yield, low pollution, and relatively long fibers, but its paper strength is not high. Combining the two can better achieve a balance in carrier paper performance. Therefore, in some embodiments, the oven-dry weight ratio of chemical softwood pulp to mechanical softwood pulp is 4-5:6-7.

[0010] It should be noted that the present invention does not impose special limitations on the specific production process and raw materials of chemical softwood pulp and mechanical softwood pulp. It is only necessary to control the degree of beating of the two to meet the process requirements of the present invention. Therefore, in some embodiments, the degree of beating of chemical softwood pulp after beating pretreatment is 45-50°SR. In some embodiments, the freeness of the mechanical softwood pulp after pulping pretreatment is 42–50°SR; In some embodiments, the rotation speed of the single evacuation is 22,000 to 28,000 rpm.

[0011] In some embodiments, the ratio of the TEMPO-oxidized cellulose nanoparticle suspension, carboxylated carbon nanotubes, and the oven-dry weight of the mixed slurry is 10–15 mL: 0.2–0.3 g: 1.5–1.7 g; In some implementations, the re-extraction speed is 10,000 to 15,000 rpm.

[0012] In some embodiments, the preparation method of the base paper includes: adding water to the mixed suspension pulp system, homogenizing, dewatering, pressing, and vacuum-assisted drying to obtain the paper.

[0013] In some implementations, the amount of water added is 1.5 to 2.0 L, and the homogenization is performed 8 to 10 times.

[0014] In some implementations, the dehydration time is 10–15 seconds. In some implementations, the pressing process requires absorbent pads at the top and bottom, with a pressing pressure of 8.5–10.5 MPa and a pressing time of 10–15 minutes. In some embodiments, the drying temperature is 99–105°C, the drying time is 11–14 min, and the vacuum degree is 3–5 MPa.

[0015] In a second aspect, the present invention provides a high-strength antistatic carrier paper prepared by the above-described method.

[0016] A third aspect of the present invention provides the application of the aforementioned high-strength antistatic carrier paper in the preparation of electronic components.

[0017] Beneficial effects of the present invention This invention utilizes TEMPO-oxidized cellulose nanoparticles and carboxylated carbon nanotubes as functional components. The reagents and raw materials used are all conventional pharmaceutical products, offering advantages such as easy availability and controllable cost, thus laying the formulation foundation for the industrialization of carrier paper. Introducing TEMPO-oxidized cellulose nanoparticles and carboxylated carbon nanotubes into paper is expected to produce high-strength, antistatic carrier paper, solving the problems of insufficient strength, weak interlayer bonding, and lack of antistatic properties in traditional carrier paper. This can be used in the preparation of high-precision electronic component carrier paper for new energy vehicles, flexible display equipment, and biomedical devices.

[0018] Secondly, unlike existing carrier paper, the preparation process of this application introduces carboxylated carbon nanotubes as a conductive functional component to adjust the conductivity and antistatic properties of the carrier paper. This can prevent the static electricity from friction between paper materials from damaging electronic components and reduce the transportation damage rate.

[0019] Furthermore, carboxylated carbon nanotubes have abundant carboxyl groups, which, after dispersion, can form hydrogen bonds with fibers with high beating degree, ensuring uniform dispersion and retention, avoiding the loss of functional fillers and the treatment burden in white water engineering production.

[0020] Furthermore, in order to adjust the strength of the carrier paper and the interlayer bonding strength and avoid the problem of paper shedding and dusting, this application prefers TEMPO oxidized nanocellulose as a reinforcing component. By controlling the viscosity, density and fluid properties of the pulp, the papermaking uniformity and paper interface strength are improved. This is mainly because TEMPO oxidized nanocellulose has excellent drying and self-film-forming properties.

[0021] Furthermore, considering that carrier paper requires high precision and multiple pins in practical applications, the TEMPO oxidized nanocellulose integral paper of the present invention has higher plasticity, which is conducive to continuous pore pressing and improving manufacturing efficiency and automation level. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. Exemplary embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the preparation process in an embodiment of the present invention. Detailed Implementation

[0024] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] The present invention will be further described in detail below with reference to specific embodiments. It should be noted that the specific embodiments are explanations of the present invention and not limitations thereof.

[0026] In the following examples, the chemical softwood pulp, mechanical softwood pulp, and all reagents are commercially available products.

[0027] Example 1 Step 1: Dilute cellulose fibers with water and stir to form a suspension. Add TEMPO, sodium bromide and sodium hypochlorite. Adjust the pH with potassium hydroxide solution and react for 2 hours. Then wash with deionized water until neutral and homogenize under high pressure to obtain TEMPO-oxidized nanocellulose suspension A.

[0028] The concentration of the diluted cellulose fiber suspension was 8 mg / mL, and the ratio of TEMPO, sodium bromide, and sodium hypochlorite added was 0.01 g: 0.05 g: 4 mmol. The concentration of potassium hydroxide solution was unlimited, and the pH of the mixture was adjusted to 10.4. The number of washings was unlimited, and the washing was carried out until the concentration of the suspension was 6.8. The high-pressure homogenization pressure was 60 MPa, and the number of times was 15.

[0029] Step 2: Perform pulping pretreatment on chemical softwood pulp and mechanical softwood pulp respectively to improve the degree of fibrillation and freeness, and then prepare a mixed suspension in a certain proportion and decompose it to obtain mixed pulp B; The chemical softwood pulp was pre-treated to 45°SR, and the mechanical softwood pulp was pre-treated to 46°SR. After the pre-treatment, the oven-dry mass ratio of the chemical softwood pulp to the mechanical softwood pulp was 4:6, and the desolvation speed was 22,000 rpm.

[0030] Step 3: Add TEMPO-oxidized nanocellulose suspension A and carboxylated carbon nanotubes (commercially available products) to the mixed slurry B, and then further decompose to obtain the mixed suspension slurry system C; The ratio of the added TEMPO-oxidized nanocellulose suspension, carboxylated carbon nanotubes, and the oven-dry weight of mixed slurry B was 10 mL: 0.2 g: 1.5 g, and the re-disintegration speed was 10,000 rpm.

[0031] Step 4: The mixed suspension slurry system C is subjected to water addition, homogenization, dewatering in a paper forming machine, pressing in a flat vulcanizing machine, and vacuum-assisted drying to obtain high-strength antistatic carrier paper.

[0032] The process involves adding 1.5L of water, homogenizing the mixture 8 times, dehydrating for 10 seconds, pressing with absorbent pads on both sides of the flat vulcanizing press, pressing pressure of 8.5MPa for 10 minutes, drying at 99℃ for 11 minutes, and using a vacuum of 3MPa.

[0033] In this embodiment, the basis weight of the carrier paper is 95 g / m². 2 The paper retention rate was 87%, and the interlayer bond strength was 256 J / m. 2 It has a tensile strength of 17kN / mm, a surface strength of 3m / s, a moisture content of 5.5%, and an electrical conductivity of 15 S / cm. It features high strength, high bonding strength, and antistatic properties. In addition, the manufacturing process is relatively stable, has strong engineering operability, and the overall cost is controllable, making it a valuable material for applications.

[0034] Example 2 Step 1: Dilute cellulose fibers with water and stir to form a suspension. Add TEMPO, sodium bromide and sodium hypochlorite. Adjust the pH with potassium hydroxide solution and react for 2 hours. Then wash with deionized water until neutral and homogenize under high pressure to obtain TEMPO-oxidized nanocellulose suspension A.

[0035] The concentration of the diluted cellulose fiber suspension was 9 mg / mL, and the ratio of TEMPO, sodium bromide, and sodium hypochlorite added was 0.012 g: 0.06 g: 4.2 mmol. The concentration of potassium hydroxide solution was unlimited, and the pH of the mixture was adjusted to 10.5. The number of washings was unlimited, and the washing was carried out until the concentration of the suspension was 6.9. The high-pressure homogenization pressure was 63 MPa, and the number of times was 17.

[0036] Step 2: Perform pulping pretreatment on chemical softwood pulp and mechanical softwood pulp respectively to improve the degree of fibrillation and freeness, and then prepare a mixed suspension in a certain proportion and decompose it to obtain mixed pulp B; The chemical softwood pulp was pre-treated to 46°SR, and the mechanical softwood pulp was pre-treated to 43°SR. After the pre-treatment, the oven-dry mass ratio of the chemical softwood pulp to the mechanical softwood pulp was 4.5:6, and the desolvation speed was 23,000 rpm.

[0037] Step 3: Add TEMPO-oxidized nanocellulose suspension A and carboxylated carbon nanotubes to mixed slurry B, and then decompose again to obtain mixed suspension slurry system C; The ratio of the added TEMPO-oxidized nanocellulose suspension, carboxylated carbon nanotubes, and the oven-dry weight of mixed slurry B was 11 mL: 0.25 g: 1.6 g, and the re-disintegration speed was 11000 rpm.

[0038] Step 4: The mixed suspension slurry system C is subjected to water addition, homogenization, dewatering in a paper forming machine, pressing in a flat vulcanizing machine, and vacuum-assisted drying to obtain high-strength antistatic carrier paper.

[0039] The process involves adding 1.6L of water, homogenizing the mixture 9 times, dehydrating for 11 seconds, pressing with absorbent pads on both sides of the flat vulcanizing press, pressing pressure of 9.0MPa for 11 minutes, drying at 100℃ for 12 minutes, and using a vacuum of 4MPa.

[0040] In this embodiment, the basis weight of the carrier paper is 95 g / m². 2 The paper retention rate was 88%, and the interlayer bond strength was 241 J / m. 2 It has a tensile strength of 16kN / mm, a surface strength of 4m / s, a moisture content of 5.8%, and an electrical conductivity of 12 S / cm. It features high strength, high bonding strength, and antistatic properties. In addition, the manufacturing process is relatively stable, has strong engineering operability, and the overall cost is controllable, making it a valuable material for applications.

[0041] Example 3 Step 1: Dilute cellulose fibers with water and stir to form a suspension. Add TEMPO, sodium bromide and sodium hypochlorite. Adjust the pH with potassium hydroxide solution and react for 2 hours. Then wash with deionized water until neutral and homogenize under high pressure to obtain TEMPO-oxidized nanocellulose suspension A.

[0042] The concentration of the diluted cellulose fiber suspension was 10 mg / mL, and the ratio of TEMPO, sodium bromide, and sodium hypochlorite added was 0.013 g: 0.08 g: 5 mmol; the concentration of potassium hydroxide solution was unlimited, and the pH of the mixture was adjusted to 10.5. The number of washing cycles is unlimited, until the suspension concentration reaches 7.0; the high-pressure homogenization pressure is 72 MPa, and the number of cycles is 18.

[0043] Step 2: Perform pulping pretreatment on chemical softwood pulp and mechanical softwood pulp respectively to improve the degree of fibrillation and freeness, and then prepare a mixed suspension in a certain proportion and decompose it to obtain mixed pulp B; The chemical softwood pulp was pre-treated to 48°SR, and the mechanical softwood pulp was pre-treated to 50°SR. After the pre-treatment, the oven-dry mass ratio of the chemical softwood pulp to the mechanical softwood pulp was 4.8:6.2, and the desolvation speed was 27,000 rpm.

[0044] Step 3: Add TEMPO-oxidized nanocellulose suspension A and carboxylated carbon nanotubes to mixed slurry B, and then decompose again to obtain mixed suspension slurry system C; The ratio of the added TEMPO-oxidized nanocellulose suspension, carboxylated carbon nanotubes, and the oven-dry weight of mixed slurry B was 14 mL: 0.28 g: 1.65 g, and the re-disintegration speed was 13000 rpm.

[0045] Step 4: The mixed suspension slurry system C is subjected to water addition, homogenization, dewatering in a paper forming machine, pressing in a flat vulcanizing machine, and vacuum-assisted drying to obtain high-strength antistatic carrier paper.

[0046] The process involves adding 1.9L of water, homogenizing the mixture 9 times, dehydrating for 14 seconds, pressing with absorbent pads on both sides of the flat vulcanizing press, pressing pressure of 10MPa for 13 minutes, drying at 102℃ for 13 minutes, and a vacuum of 5MPa.

[0047] In this embodiment, the basis weight of the carrier paper is 96 g / m². 2 The paper retention rate is 85%, and the interlayer bond strength is 268 J / m. 2It has a tensile strength of 17kN / mm, a surface strength of 3m / s, a moisture content of 3.7%, and an electrical conductivity of 18 S / cm. It features high strength, high bonding strength, and antistatic properties. In addition, the manufacturing process is relatively stable, has strong engineering operability, and the overall cost is controllable, making it a valuable material for applications.

[0048] Example 4 Step 1: Dilute cellulose fibers with water and stir to form a suspension. Add TEMPO, sodium bromide and sodium hypochlorite. Adjust the pH with potassium hydroxide solution and react for 2 hours. Then wash with deionized water until neutral and homogenize under high pressure to obtain TEMPO-oxidized nanocellulose suspension A.

[0049] The concentration of the diluted cellulose fiber suspension was 12 mg / mL, and the ratio of TEMPO, sodium bromide, and sodium hypochlorite added was 0.015 g: 0.10 g: 5 mmol; the concentration of potassium hydroxide solution was unlimited, and the pH of the mixture was adjusted to 10.6. The number of washing cycles is unlimited, until the suspension concentration reaches 7.2; the high-pressure homogenization pressure is 80 MPa, and the number of cycles is 20.

[0050] Step 2: Perform pulping pretreatment on chemical softwood pulp and mechanical softwood pulp respectively to improve the degree of fibrillation and freeness, and then prepare a mixed suspension in a certain proportion and decompose it to obtain mixed pulp B; The chemical softwood pulp was pre-treated to 50°SR, and the mechanical softwood pulp was pre-treated to 50°SR. After the pre-treatment, the oven-dry mass ratio of the chemical softwood pulp to the mechanical softwood pulp was 5:7, and the desolvation speed was 28,000 rpm.

[0051] Step 3: Add TEMPO-oxidized nanocellulose suspension A and carboxylated carbon nanotubes to mixed slurry B, and then decompose again to obtain mixed suspension slurry system C; The ratio of the added TEMPO-oxidized nanocellulose suspension, carboxylated carbon nanotubes, and the oven-dry weight of mixed slurry B was 15 mL: 0.3 g: 1.7 g, and the re-disintegration speed was 15000 rpm.

[0052] Step 4: The mixed suspension slurry system C is subjected to water addition, homogenization, dewatering in a paper forming machine, pressing in a flat vulcanizing machine, and vacuum-assisted drying to obtain high-strength antistatic carrier paper.

[0053] The process involves adding 2.0L of water, homogenizing the mixture 10 times, dehydrating for 15 seconds, pressing with absorbent pads on both sides using a flat vulcanizing press, pressing at 10.5MPa for 15 minutes, drying at 105℃ for 14 minutes, and using a vacuum of 5MPa.

[0054] In this embodiment, the basis weight of the carrier paper is 96 g / m². 2 The paper retention rate is 90%, and the interlayer bond strength is 248 J / m. 2 It has a tensile strength of 18kN / mm, a surface strength of 3m / s, a moisture content of 6.2%, and an electrical conductivity of 17 S / cm. It features high strength, high bonding strength, and antistatic properties. In addition, the manufacturing process is relatively stable, has strong engineering operability, and the overall cost is controllable, making it a valuable material for applications.

[0055] Example 5 Step 1: Dilute cellulose fibers with water and stir to form a suspension. Add TEMPO, sodium bromide and sodium hypochlorite. Adjust the pH with potassium hydroxide solution and react for 2 hours. Then wash with deionized water until neutral and homogenize under high pressure to obtain TEMPO-oxidized nanocellulose suspension A.

[0056] The concentration of the diluted cellulose fiber suspension was 10 mg / mL, and the ratio of TEMPO, sodium bromide, and sodium hypochlorite added was 0.014 g: 0.9 g: 4 mmol; the concentration of potassium hydroxide solution was unlimited, and the pH of the mixture was adjusted to 10.4. The number of washing cycles is unlimited, until the suspension concentration reaches 6.8; the high-pressure homogenization pressure is 61 MPa, and the number of cycles is 15.

[0057] Step 2: Perform pulping pretreatment on chemical softwood pulp and mechanical softwood pulp respectively to improve the degree of fibrillation and freeness, and then prepare a mixed suspension in a certain proportion and decompose it to obtain mixed pulp B; The chemical softwood pulp was pre-treated to 50°SR, and the mechanical softwood pulp was pre-treated to 48°SR. After the pre-treatment, the oven-dry mass ratio of the chemical softwood pulp to the mechanical softwood pulp was 4:7, and the desolvation speed was 28,000 rpm.

[0058] Step 3: Add TEMPO-oxidized nanocellulose suspension A and carboxylated carbon nanotubes to mixed slurry B, and then decompose again to obtain mixed suspension slurry system C; The ratio of the added TEMPO-oxidized nanocellulose suspension, carboxylated carbon nanotubes, and the oven-dry weight of mixed slurry B was 15 mL: 0.2 g: 1.5 g, and the re-disintegration speed was 10,000 rpm.

[0059] Step 4: The mixed suspension slurry system C is subjected to water addition, homogenization, dewatering in a paper forming machine, pressing in a flat vulcanizing machine, and vacuum-assisted drying to obtain high-strength antistatic carrier paper.

[0060] The process involves adding 1.5L of water, homogenizing the mixture 10 times, dehydrating for 10 seconds, pressing with absorbent pads on both sides of the flat vulcanizing press, pressing pressure of 10.5MPa for 15 minutes, drying at 105℃ for 11 minutes, and using a vacuum of 3MPa.

[0061] In this embodiment, the basis weight of the carrier paper is 97 g / m². 2 The paper retention rate was 88%, and the interlayer bond strength was 258 J / m. 2 It has a tensile strength of 19kN / mm, a surface strength of 2m / s, a moisture content of 4.6%, and an electrical conductivity of 20 S / cm. It features high strength, high bonding strength, and antistatic properties. In addition, the manufacturing process is relatively stable, has strong engineering operability, and the overall cost is controllable, making it a valuable material for applications.

[0062] Comparative Example 1 The difference from Example 1 is that in step 3, cationic starch is used instead of mixed slurry B, and the two have the same oven-dry weight.

[0063] The basis weight of the carrier paper in this comparative example is 95 g / m². 2 The paper retention rate was 78%, and the interlayer bond strength was 167 J / m. 2 It has a tensile strength of 12kN / mm, a surface strength of 1m / s, a moisture content of 5.7%, and an electrical conductivity of 8 S / cm.

[0064] Comparative Example 2 The difference from Example 1 is that in step 2, only chemical softwood pulp is used, and the total amount of pulp remains the same.

[0065] The basis weight of the carrier paper in this comparative example is 95 g / m². 2 The paper retention rate was 86%, and the interlayer bond strength was 162 J / m. 2 It has a tensile strength of 13 kN / mm, a surface strength of 3 m / s, a moisture content of 5.4%, and an electrical conductivity of 14 S / cm.

[0066] Comparative Example 3 The difference from Example 1 is that in step 2, only mechanical softwood pulp is used, and the total amount of pulp remains the same.

[0067] The basis weight of the carrier paper in this comparative example is 95 g / m². 2 The paper retention rate was 77%, and the interlayer bond strength was 230 J / m. 2 It has a tensile strength of 14 kN / mm, a surface strength of 2 m / s, a moisture content of 5.7%, and an electrical conductivity of 16 S / cm.

[0068] As can be seen from the comparison between Example 1 and Comparative Example 1, compared with cationic starch, the use of mixed slurry B can achieve better paper interlayer bonding strength, and the conductivity and paper strength are also enhanced.

[0069] As can be seen from the comparison of Example 1 and Comparative Examples 2 and 3, the combination of mechanical softwood pulp and chemical softwood pulp can better improve the interlayer bonding strength and tensile strength of paper compared with using only mechanical softwood pulp or chemical softwood pulp.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A preparation process for a high-strength antistatic carrier paper, characterized in that, include: Preparation of TEMPO-oxidized cellulose nanoparticle suspension; Chemical softwood pulp and mechanical softwood pulp are pre-treated by pulping, mixed, and then loosened to obtain a mixed pulp. Add TEMPO-oxidized cellulose nanoparticles and carboxylated carbon nanotubes to the mixed slurry, and then decompose again to obtain a mixed suspension slurry system; The hybrid suspension slurry system is then used to make base paper, which is the final product. The method for preparing the TEMPO-oxidized cellulose nanoparticle suspension includes: Cellulose fibers were diluted with water to form a suspension. TEMPO, sodium bromide and sodium hypochlorite were added, and the pH was adjusted to 10.4-10.6 before the reaction was carried out. After the reaction was completed, the suspension was washed until neutral and homogenized under high pressure to obtain a TEMPO-oxidized nanocellulose suspension. The ratio of TEMPO, sodium bromide, and sodium hypochlorite used is 0.010–0.015 g : 0.05–0.10 g : 4–5 mmol; The oven-dry weight ratio of the chemical softwood pulp to the mechanical softwood pulp is 4-5:6-7; The freeness of chemical softwood pulp after pulping pretreatment is 45-50°SR; The freeness of mechanical softwood pulp after pulping pretreatment is 42-50°SR; The de-icing speed is 22,000 to 28,000 rpm; The ratio of the TEMPO-oxidized cellulose nanoparticle suspension, carboxylated carbon nanotubes, and the oven-dry weight of the mixed slurry is 10–15 mL: 0.2–0.3 g: 1.5–1.7 g; The second decompression speed is 10,000 to 15,000 rpm; The preparation method of the base paper includes: adding water, homogenizing, dewatering, pressing, and vacuum-assisted drying to obtain the mixed suspension pulp system; the amount of water added is 1.5-2.0L, and the homogenization is performed 8-10 times. The dehydration time is 10-15 seconds; The pressing process requires absorbent pads at both the top and bottom, with a pressing pressure of 8.5–10.5 MPa and a pressing time of 10–15 minutes. The drying temperature is 99–105℃, the time is 11–14 min, and the vacuum degree is 3–5 MPa.

2. The high-strength antistatic carrier paper prepared by the preparation process described in claim 1.

3. The application of the high-strength antistatic carrier paper as described in claim 2 in the preparation of electronic components.

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