Low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire and preparation method thereof

Abstract

The invention relates to a solar silicon wafer cutting technology, which is used to solve the problems of unstable material and inconsistent cutting resistance of existing cutting liners, resulting in unstable wire bow when cutting through and retracting; insufficient lubrication of the liner material easily causes friction damage to the diamond wire, making the diamond wire diameter uneven, thereby causing wire breakage, wire jumps, etc. The invention specifically relates to a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire and a preparation method thereof; in the preparation method, foaming masterbatch is used to control the density of the board material, ensuring that the board material is easy to cut and the cutting performance is uniform and adjustable, solving the problem of additional cutting in wide-space cutting after the diamond wire is thinned and the problem of inconsistent wire bow when cutting through the knife; diamond wire cutting is essentially a process of mutual wear between the diamond wire and the plastic plate, and the added white solid lubricant, lubricating auxiliary agent and extreme pressure agent components ensure the smoothness of the diamond wire and the protection of the diamond wire during the cutting process.

Description

Technical Field

[0001] The invention relates to a solar silicon wafer cutting technology, and in particular to a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire and a preparation method thereof. Background Art

[0002] Solar photovoltaic panel power generation technology is now widely recognized as a green energy technology. During the production of photovoltaic panels, slicing silicon ingots is a crucial step in the production process. The efficiency of silicon wafer cutting is a key consideration in silicon wafer production.

[0003] Currently, multi-wire diamond wire sawing technology is widely used for silicon wafer slicing. The diameter of the diamond wire has been continuously reduced since its initial 65μm. The diameter of the diamond wire used in photovoltaic wafer slicing currently ranges from approximately 35-42μm. Simultaneously, with the demand for cost reduction in photovoltaic panels, the size of silicon wafers has evolved from wafers with a margin of 142 to larger wafers with a margin of 210. This reduction in diamond wire strength reduces the strength of the wire itself, which in turn reduces wire tension during slicing, resulting in less stable cutting. Furthermore, as silicon ingots grow in size, the cutting distance also increases, placing higher demands on the cutting of plastic liner sheets.

[0004] The mainstream cutting liners on the market are prone to unstable materials and inconsistent cutting resistance, resulting in unstable wire bow when cutting through and retracting the knife; the liner material is not lubricated enough, which can easily cause friction damage to the diamond wire, making the diamond wire diameter uneven, resulting in wire breakage, wire jumping, etc. Summary of the Invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a low-density, wide-space cutting plastic liner suitable for ultra-fine diamond wire and a preparation method thereof: ABS resin, solid lubricant, lubricating aid, extreme pressure agent, and processing aid are added to a twin-screw extruder according to a ratio for mixing and granulation to obtain modified ABS resin particles, the modified ABS resin particles and foaming masterbatch are stirred and mixed, and then added to an extrusion calender for extrusion and drawing, cut to a fixed length, and prepare a blank, the blank is milled on six sides, and the blank is cleaned and packaged after cutting to obtain a low-density, wide-space cutting plastic liner suitable for ultra-fine diamond wire, which solves the problems of unstable material and inconsistent cutting resistance of existing cutting liners, resulting in unstable wire bow during cutting through and retracting; insufficient lubrication of the liner material easily causes friction damage to the diamond wire, making the diamond wire diameter uneven, thereby causing wire breakage, wire jump, etc.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A low-density, wide-space cutting plastic liner suitable for ultra-fine diamond wires comprises the following components in parts by weight:

[0008] 85-96 parts of ABS resin, 2-10 parts of foaming masterbatch, 0.1-0.3 parts of solid lubricant, 0.1-0.5 parts of lubricating additive, 0.1-0.2 parts of extreme pressure agent, 2-5 parts of processing aid.

[0009] As a further solution of the present invention: the ABS resin is prepared by a bulk process and has a melt index of 2-15 g / 10 min.

[0010] As a further solution of the present invention: the foaming temperature of the foaming masterbatch is 120-200°C, the masterbatch resin matrix of the foaming masterbatch is one of ABS, AS, HIPS, and SMA resins, and the nucleating agent of the foaming masterbatch is one or more of talc, kaolin, and montmorillonite.

[0011] As a further solution of the present invention: the solid lubricant is a composite solid lubricant of zinc sulfide and phosphate in a mass ratio of 1:1.

[0012] As a further solution of the present invention: the lubricating agent is a self-made agent, and the self-made process of the lubricating agent is as follows:

[0013] A1: Add anisole, acetic anhydride, and anhydrous aluminum chloride to a three-necked flask equipped with a stirrer and a thermometer. Stir and react for 3-4 hours at 0-3°C and 400-500 rpm. After the reaction, add the reaction product to ice water, then add concentrated hydrochloric acid. Allow to stand and separate. Wash the organic phase with distilled water and sodium hydroxide solution 2-3 times, then dry over anhydrous magnesium sulfate. Collect the fraction at 137-140°C by distillation, cool, and crystallize to obtain Intermediate 1.

[0014] The reaction process is as follows:

[0015]

[0016] A2: Add intermediate 1 and anhydrous methanol to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel; add silicon tetrachloride dropwise while stirring at a temperature of 25-30°C and a stirring rate of 400-500 r / min; control the dropping rate to be 1-2 drops / s; continue stirring and reacting for 8-10 hours after the addition is complete; then add sodium hydroxide solution and continue stirring and reacting for 1-2 hours; after the reaction is completed, vacuum filter the reaction product; wash the filter cake with distilled water 2-3 times, then place it in a vacuum drying oven and dry it at a temperature of 50-60°C for 8-10 hours; then reflux it with methanol solution for 0.5-1 hour; then cool the reaction product to room temperature; then vacuum filter it; place the filter cake in a vacuum drying oven and dry it at a temperature of 50-60°C for 2-3 hours to obtain intermediate 2;

[0017] The reaction process is as follows:

[0018]

[0019] A3: Add intermediate 2 and dichloromethane to a three-necked flask equipped with a stirrer, thermometer, gas guide tube and constant pressure dropping funnel, and introduce nitrogen protection. Stir for 40-50 min at a temperature of 25-30°C and a stirring rate of 400-500 r / min. Then, add boron tribromide solution dropwise while stirring at a rate of 1-2 drops / s. After the addition is complete, heat the mixture to reflux and continue stirring for 6-8 h. After the reaction is completed, the reaction product is cooled to room temperature, and concentrated hydrochloric acid is added. Continue stirring for 0.5-1 h. The solvent is removed by rotary evaporation and then vacuum filtered. The filter cake is washed with distilled water 2-3 times and then placed in a vacuum drying oven and dried at 50-60°C for 4-5 h to obtain intermediate 3.

[0020] The reaction process is as follows:

[0021]

[0022] A4: Add intermediate 3, triethylamine and dichloromethane to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel. Add the chloroheptafluorobutyric acid solution dropwise with stirring at a temperature of -5-0°C and a stirring rate of 400-500 r / min. The dropping rate is controlled to 1-2 drops / s. After the addition is complete, continue stirring and reacting for 2-3 hours. Then, raise the temperature to 50-55°C and continue stirring and reacting for 2-3 hours. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, wash with distilled water 2-3 times, recrystallize with ethyl acetate, and rotary evaporate to remove the solvent to obtain a lubricating agent.

[0023] The reaction process is as follows:

[0024]

[0025] As a further embodiment of the present invention, the anisole, acetic anhydride, anhydrous aluminum chloride and concentrated hydrochloric acid in step A1 are used in a ratio of 0.05 mol: 0.05-0.06 mol: 20-25 g: 1-2 mL, the mass fraction of the concentrated hydrochloric acid is 36-38%, and the mass fraction of the sodium hydroxide solution is 15-20%.

[0026] As a further embodiment of the present invention, the ratio of the intermediate 1, anhydrous methanol, silicon tetrachloride, and sodium hydroxide solution in step A2 is 0.1 mol: 80-100 mL: 0.35-0.4 mol: 100-150 mL, the mass fraction of the sodium hydroxide solution is 10-15%, and the volume fraction of the methanol solution is 80-90%.

[0027] As a further embodiment of the present invention, the intermediate 2, dichloromethane, boron tribromide solution, and concentrated hydrochloric acid in step A3 are used in a ratio of 0.05-0.06 mol:120-150 mL:80-100 mL:50-60 mL. The boron tribromide solution is a solution formed by dissolving boron tribromide in dichloromethane at a ratio of 8-10 mmol:10-15 mL. The mass fraction of the concentrated hydrochloric acid is 36-38%.

[0028] As a further embodiment of the present invention: the intermediate 3, triethylamine, dichloromethane and chloroheptafluorobutyric acid solution in step A4 are used in a ratio of 0.1 mol: 0.44-0.48 mol: 80-100 mL: 20-30 mL, and the perfluorobutyryl chloride solution is a solution formed by dissolving perfluorobutyryl chloride in dichloromethane at a ratio of 0.35-0.4 mol: 25-30 mL.

[0029] As a further solution of the present invention: the extreme pressure agent is fatty acid diethanolamine borate.

[0030] As a further solution of the present invention: the processing aid is one or a mixture of several of stearic acid, zinc stearate, and ethylene bisstearamide (EBS) in any mass ratio.

[0031] As a further solution of the present invention: a method for preparing a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire comprises the following steps:

[0032] S1. Raw material mixing and granulation: ABS resin, solid lubricant, lubricating agent, extreme pressure agent, and processing aid are added to a twin-screw extruder according to a ratio and mixed and granulated to obtain modified ABS resin particles, wherein the temperature of the twin-screw extruder is set at 240-260°C;

[0033] S2. Extrusion, calendering and cutting of liner: After the modified ABS resin particles and foaming masterbatch are stirred and mixed, they are added into an extrusion calender to extrude and draw the liner, and cut to a fixed length to prepare the blank. The extrusion temperature is set at 220-240°C and the extrusion speed is 0.2-5 mm / s;

[0034] S3. Post-processing of cutting liner: Mill the six sides of the blank to meet the thickness accuracy of ±0.2mm, and then pull the surface to produce linear grooves along the length direction. The linear grooves have the following specifications: width 0.5-2mm, depth 0.1-0.3mm, and spacing 5-10mm.

[0035] S4. Cleaning and packaging: After the blank is cut, it is cleaned and packaged to obtain a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire.

[0036] Beneficial effects of the present invention:

[0037] The invention discloses a low-density, wide-space cutting plastic liner suitable for ultra-fine diamond wire and a preparation method thereof. The invention comprises the following steps: ABS resin, solid lubricant, lubricating auxiliary agent, extreme pressure agent and processing auxiliary agent are added to a twin-screw extruder according to a proportion for mixing and granulation to obtain modified ABS resin particles; the modified ABS resin particles and foaming masterbatch are stirred and mixed, and then added to an extrusion calender for extrusion and drawing, and cut to a fixed length to prepare a blank; the blank is milled and cut on six sides; the blank is cleaned and packaged after being cut to obtain a low-density, wide-space cutting plastic liner suitable for ultra-fine diamond wire; the preparation method adopts foaming masterbatch to control the density of the plate, thereby ensuring that the plate is easy to cut and the cutting performance is uniform and adjustable, thereby solving the problem of the problem of the plate being difficult to cut after the diamond wire is thinned. , the problem of overcutting during wide-space cutting and the problem of inconsistent wire bow when cutting through the knife; diamond wire cutting is essentially a process of mutual wear between the diamond wire and the plastic plate. The added white solid lubricant, lubricating aid and extreme pressure agent components ensure the smoothness of the diamond wire and do not damage the diamond wire during the cutting process, and effectively reduce the probability of wire jamming and wire breakage compared with the existing technology; bubbles in the epoxy adhesive layer during cutting are an important factor causing chipping and bright edges of silicon wafers. The mixing and coating processes during sticking can easily introduce air to cause bubbles in the adhesive layer, which is particularly obvious in manual sticking. The linear grooves on the surface of the liner in the present invention can effectively break the bubbles in the adhesive layer when the silicon rod moves back and forth during bonding and positioning, thereby reducing hollow defects in the adhesive layer.

[0038] In the process of preparing a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, a lubricating agent is first prepared. First, anisole and acetic anhydride are used as raw materials to introduce an acetyl group to the benzene ring of anisole to obtain intermediate 1. Then, intermediate 1 reacts to form intermediate 2 containing a large number of benzene rings and ether methyl groups. Then, the ether methyl group on intermediate 2 breaks to form a hydroxyl group to obtain intermediate 3. Finally, the hydroxyl group on intermediate 3 reacts with the chlorine atom on chloroheptafluorobutyric acid to undergo a nucleophilic substitution reaction to introduce a large number of CF bonds to obtain a lubricating agent. The molecular structure of the lubricating agent contains a large number of benzene rings and CF bonds, which can provide Improve the mechanical properties of low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire. Due to the large radius and high electronegativity of fluorine atoms, they can act as charge shielding for carbon atoms in the macromolecular chain, and there is a repulsive effect between fluorine atoms. Therefore, a large number of CF bonds make the low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire not only have weak attraction between molecules, but also have weak attraction to other contacting molecules. Therefore, the low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire has a very small friction coefficient and exhibits good lubricity, which solves the problem of insufficient lubrication of the liner material and easy friction damage to the diamond wire. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] Example 1:

[0041] This embodiment is a method for preparing a lubricating agent, comprising the following steps:

[0042] A1: 0.05 mol of anisole, 0.05 mol of acetic anhydride, and 20 g of anhydrous aluminum chloride were added to a three-necked flask equipped with a stirrer and a thermometer. The mixture was stirred at 0°C and 400 rpm for 3 h. After the reaction, the reaction product was added to ice water, followed by 1 mL of 36% concentrated hydrochloric acid. The mixture was allowed to stand for separation. The organic phase was washed twice with distilled water and then with 15% sodium hydroxide solution, then dried over anhydrous magnesium sulfate. The fraction at 137°C was collected by distillation and cooled for crystallization to obtain Intermediate 1.

[0043] A2: 0.1 mol of intermediate 1 and 80 mL of anhydrous methanol were added to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel. 0.35 mol of silicon tetrachloride was added dropwise with stirring at a temperature of 25°C and a stirring rate of 400 r / min. The dropping rate was controlled to be 1 drop / s. After the addition was completed, stirring was continued for 8 hours. Then, 100 mL of a 10% sodium hydroxide solution was added and stirring was continued for 1 hour. After the reaction was completed, the reaction product was vacuum filtered, the filter cake was washed twice with distilled water, and then placed in a vacuum drying oven and dried at a temperature of 50°C for 8 hours. Then, the mixture was refluxed with a methanol solution with a volume fraction of 80% for 0.5 hours. The reaction product was then cooled to room temperature and vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at a temperature of 50°C for 2 hours to obtain intermediate 2.

[0044] A3: 0.05 mol of intermediate 2 and 120 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer, a gas guide tube and a constant pressure dropping funnel, and nitrogen was introduced. The mixture was stirred at a temperature of 25°C and a stirring rate of 400 r / min for 40 min. Then, 80 mL of a boron tribromide solution prepared by dissolving 8 mmol:10 mL of boron tribromide in dichloromethane was added dropwise while stirring. The dropping rate was controlled to 1 drop / s. After the addition was completed, the temperature was raised to reflux and the reaction was continued with stirring for 6 h. After the reaction was completed, the reaction product was cooled to room temperature, and then 50 mL of 36% concentrated hydrochloric acid was added and the reaction was continued with stirring for 0.5 h. The solvent was removed by rotary evaporation and then vacuum filtered. The filter cake was washed twice with distilled water and then placed in a vacuum drying oven and dried at 50°C for 4 h to obtain intermediate 3.

[0045] A4: 0.1 mol of intermediate 3, 0.44 mol of triethylamine and 80 mL of dichloromethane were added to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel. 20 mL of a chloroheptafluorobutyric acid solution prepared by dissolving perfluorobutyryl chloride in dichloromethane at a ratio of 0.35 mol:25 mL was added dropwise with stirring at a temperature of -5°C and a stirring rate of 400 r / min. The dropping rate was controlled to be 1 drop / s. After the addition was completed, the reaction was continued with stirring for 2 h. The temperature was then raised to 50°C and the reaction was continued with stirring for 2 h. After the reaction was completed, the reaction product was cooled to room temperature, and the solvent was removed by rotary evaporation. The product was then washed twice with distilled water, recrystallized with ethyl acetate, and then the solvent was removed by rotary evaporation to obtain a lubricating agent.

[0046] Example 2:

[0047] This embodiment is a method for preparing a lubricating agent, comprising the following steps:

[0048] A1: 0.05 mol of anisole, 0.06 mol of acetic anhydride, and 25 g of anhydrous aluminum chloride were added to a three-necked flask equipped with a stirrer and a thermometer. The mixture was stirred at 3°C ​​and 500 rpm for 4 h. After the reaction, the reaction product was added to ice water, followed by 2 mL of 38% concentrated hydrochloric acid. The mixture was allowed to stand for stratification. The organic phase was washed three times with distilled water and then with 20% sodium hydroxide solution, then dried over anhydrous magnesium sulfate. The fraction at 140°C was collected by distillation and cooled for crystallization to obtain Intermediate 1.

[0049] A2: 0.1 mol of intermediate 1 and 100 mL of anhydrous methanol were added to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel. 0.4 mol of silicon tetrachloride was added dropwise with stirring at a temperature of 30°C and a stirring rate of 500 r / min. The dropping rate was controlled at 2 drops / s. After the addition was completed, the stirring reaction was continued for 10 hours. Then, 150 mL of a 15% sodium hydroxide solution was added and the stirring reaction was continued for 2 hours. After the reaction was completed, the reaction product was vacuum filtered, the filter cake was washed with distilled water 3 times, and then placed in a vacuum drying oven and dried at 60°C for 10 hours. Then, the mixture was refluxed with a 90% methanol solution by volume for 1 hour. The reaction product was then cooled to room temperature and vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at 60°C for 3 hours to obtain intermediate 2.

[0050] A3: 0.06 mol of intermediate 2 and 150 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer, a gas guide tube and a constant pressure dropping funnel, and nitrogen was introduced. The mixture was stirred at a temperature of 30°C and a stirring rate of 500 r / min for 50 min. Then, 100 mL of a boron tribromide solution prepared by dissolving boron tribromide in dichloromethane at a ratio of 10 mmol:15 mL was added dropwise while stirring. The dropping rate was controlled at 2 drops / s. After the addition was completed, the temperature was raised to reflux and the reaction was continued with stirring for 8 h. After the reaction was completed, the reaction product was cooled to room temperature, and then 60 mL of 38% concentrated hydrochloric acid was added and the reaction was continued with stirring for 1 h. The solvent was removed by rotary evaporation and then vacuum filtered. The filter cake was washed 3 times with distilled water and then placed in a vacuum drying oven and dried at 60°C for 5 h to obtain intermediate 3.

[0051] A4: 0.1 mol of intermediate 3, 0.48 mol of triethylamine and 100 mL of dichloromethane were added to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel. 30 mL of a chloroheptafluorobutyric acid solution prepared by dissolving perfluorobutyryl chloride in dichloromethane at a ratio of 0.4 mol:30 mL was added dropwise with stirring at a temperature of 0°C and a stirring rate of 500 r / min. The dropping rate was controlled at 2 drops / s. After the addition was completed, the reaction was continued with stirring for 3 h. The temperature was then raised to 55°C and the reaction was continued with stirring for 3 h. After the reaction was completed, the reaction product was cooled to room temperature, and the solvent was removed by rotary evaporation. The product was then washed with distilled water three times, recrystallized with ethyl acetate, and the solvent was removed by rotary evaporation to obtain a lubricating agent.

[0052] Example 3:

[0053] This embodiment is a method for preparing a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, which is characterized by comprising the following steps:

[0054] S1. Weigh the raw materials: 85 parts of ABS resin, 9.5 parts of foaming masterbatch, 0.3 parts of solid lubricant, 0.1 parts of lubricating agent, 0.2 parts of extreme pressure agent, and 5 parts of processing aid are weighed in parts by weight; wherein, the ABS resin is prepared by bulk method and has a melt index of 2g / 10min; the foaming temperature of the foaming masterbatch is 120°C, the masterbatch resin matrix of the foaming masterbatch is ABS resin, and the nucleating agent of the foaming masterbatch is talcum powder; the solid lubricant is a composite solid lubricant of zinc sulfide and phosphate in a mass ratio of 1:1; the lubricating agent is a self-made additive according to the method of Example 1; the extreme pressure agent is fatty acid diethanolamine borate; the processing aid is stearic acid

[0055] S2. Raw material mixing and granulation: ABS resin, solid lubricant, lubricating agent, extreme pressure agent, and processing aid are added to a twin-screw extruder according to a ratio and mixed and granulated to obtain modified ABS resin particles, wherein the temperature of the twin-screw extruder is set at 240° C.;

[0056] S3, extrusion calendering and cutting liner: After the modified ABS resin particles and foaming masterbatch are stirred and mixed, they are added into an extrusion calender to extrude and draw the sheet, and cut to a fixed length to prepare the blank sheet. The extrusion temperature is set at 220°C and the extrusion speed is 0.2 mm / s;

[0057] S4. Post-processing of cutting liner: Mill the six sides of the blank to meet the thickness accuracy of ±0.2mm, and then pull the surface to produce linear grooves along the length direction. The linear grooves have the following specifications: width 1mm, depth 0.1mm, and spacing 5mm.

[0058] S5. Cleaning and packaging: After the blank is cut, it is cleaned and packaged to obtain a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire.

[0059] After testing, it is found that when used on a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, the wide-space cutting wire bow is stable, the size does not deform, the wire does not hang, the output quality is good, and the probability of edge chipping and bright edge is low.

[0060] Example 4:

[0061] This embodiment is a method for preparing a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, which is characterized by comprising the following steps:

[0062] S1. Weigh the raw materials: 90 parts of ABS resin, 5 parts of foaming masterbatch, 0.2 parts of solid lubricant, 0.3 parts of lubricating agent, 0.2 parts of extreme pressure agent, and 4.6 parts of processing aid are weighed in parts by weight; wherein, the ABS resin is prepared by the bulk method and has a melt index of 8.5 g / 10 min; the foaming temperature of the foaming masterbatch is 160° C., the masterbatch resin matrix of the foaming masterbatch is AS resin, and the nucleating agent of the foaming masterbatch is kaolin; the solid lubricant is a composite solid lubricant of zinc sulfide and phosphate in a mass ratio of 1:1; the lubricating agent is an additive prepared by the method of Example 1; the extreme pressure agent is fatty acid diethanolamine borate; and the processing aid is zinc stearate;

[0063] S2. Raw material mixing and granulation: ABS resin, solid lubricant, lubricating agent, extreme pressure agent, and processing aid are added to a twin-screw extruder according to a ratio and mixed and granulated to obtain modified ABS resin particles, wherein the temperature of the twin-screw extruder is set at 250° C.;

[0064] S3, extrusion calendering and cutting liner: After the modified ABS resin particles and foaming masterbatch are stirred and mixed, they are added into an extrusion calender to extrude and draw the sheet, and cut to a fixed length to prepare the blank sheet. The extrusion temperature is set at 230°C and the extrusion speed is 2.6 mm / s;

[0065] S4. Post-processing of cutting liner: Mill the six sides of the blank to meet the thickness accuracy of ±0.2mm, and then pull the surface to produce linear grooves along the length direction. The linear grooves have the following specifications: width 1mm, depth 0.2mm, and spacing 8mm.

[0066] S5. Cleaning and packaging: After the blank is cut, it is cleaned and packaged to obtain a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire.

[0067] After testing, it is found that when used on a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, the wide-space cutting wire bow is stable, the size does not deform, the wire does not hang, the output quality is good, and the probability of edge chipping and bright edge is low.

[0068] Example 5:

[0069] This embodiment is a method for preparing a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, which is characterized by comprising the following steps:

[0070] S1. Weigh the raw materials: 95 parts of ABS resin, 2 parts of foaming masterbatch, 0.1 part of solid lubricant, 0.5 part of lubricating agent, 0.1 part of extreme pressure agent, and 2.8 parts of processing aid are weighed in parts by weight; wherein, the ABS resin is prepared by the bulk method and has a melt index of 15 g / 10 min; the foaming temperature of the foaming masterbatch is 200° C., the masterbatch resin matrix of the foaming masterbatch is SMA resin, and the nucleating agent of the foaming masterbatch is montmorillonite; the solid lubricant is a composite solid lubricant of zinc sulfide and phosphate in a mass ratio of 1:1; the lubricating agent is a self-made additive according to the method of Example 2; the extreme pressure agent is fatty acid diethanolamine borate; and the processing aid is ethylene bisstearamide (EBS);

[0071] S2. Raw material mixing and granulation: ABS resin, solid lubricant, lubricating agent, extreme pressure agent, and processing aid are added to a twin-screw extruder according to a ratio and mixed and granulated to obtain modified ABS resin particles, wherein the temperature of the twin-screw extruder is set at 260° C.

[0072] S3, extrusion calendering and cutting liner: After the modified ABS resin particles and foaming masterbatch are stirred and mixed, they are added into an extrusion calender to extrude and draw the sheet, and cut to a fixed length to prepare the blank sheet. The extrusion temperature is set at 240°C and the extrusion speed is 5 mm / s;

[0073] S4. Post-processing of cutting liner: Mill the six sides of the blank to meet the thickness accuracy of ±0.2mm, and then pull the surface to produce linear grooves along the length direction. The linear grooves have the following specifications: width 1mm, depth 0.1mm, and spacing 5mm.

[0074] S5. Cleaning and packaging: After the blank is cut, it is cleaned and packaged to obtain a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire.

[0075] After testing, it is found that when used on a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire, the wide-space cutting wire bow is stable, the size does not deform, the wire does not hang, the output quality is good, and the probability of edge chipping and bright edge is low.

[0076] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in similar ways. As long as they do not deviate from the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. Suitable for low-density wide-space cutting of plastic liner with ultra-fine diamond wire, characterized by: It comprises the following components in parts by weight: 85-96 parts of ABS resin, 2-10 parts of foaming masterbatch, 0.1-0.3 parts of solid lubricant, 0.1-0.5 parts of lubricating additive, 0.1-0.2 parts of extreme pressure agent, 2-5 parts of processing aid; The homemade process of lubricating additives is as follows: A1: Add anisole, acetic anhydride, and anhydrous aluminum chloride to a three-necked flask equipped with a stirrer and a thermometer. Stir and react for 3-4 hours at 0-3°C and 400-500 rpm. After the reaction, add the reaction product to ice water, then add concentrated hydrochloric acid. Allow to stand and separate. Wash the organic phase with distilled water and sodium hydroxide solution 2-3 times, then dry over anhydrous magnesium sulfate. Collect the fraction at 137-140°C by distillation, cool, and crystallize to obtain Intermediate 1. A2: Add intermediate 1 and anhydrous methanol to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel; add silicon tetrachloride dropwise while stirring at a temperature of 25-30°C and a stirring rate of 400-500 r / min; control the dropping rate to be 1-2 drops / s; continue stirring and reacting for 8-10 hours after the addition is complete; then add sodium hydroxide solution and continue stirring and reacting for 1-2 hours; after the reaction is completed, vacuum filter the reaction product; wash the filter cake with distilled water 2-3 times, then place it in a vacuum drying oven and dry it at a temperature of 50-60°C for 8-10 hours; then reflux it with methanol solution for 0.5-1 hour; then cool the reaction product to room temperature; then vacuum filter it; place the filter cake in a vacuum drying oven and dry it at a temperature of 50-60°C for 2-3 hours to obtain intermediate 2; A3: Add intermediate 2 and dichloromethane to a three-necked flask equipped with a stirrer, thermometer, gas guide tube and constant pressure dropping funnel, and introduce nitrogen protection. Stir for 40-50 min at a temperature of 25-30°C and a stirring rate of 400-500 r / min. Then, add boron tribromide solution dropwise while stirring at a rate of 1-2 drops / s. After the addition is complete, heat the mixture to reflux and continue stirring for 6-8 h. After the reaction is completed, the reaction product is cooled to room temperature, and concentrated hydrochloric acid is added. Continue stirring for 0.5-1 h. The solvent is removed by rotary evaporation and then vacuum filtered. The filter cake is washed with distilled water 2-3 times and then placed in a vacuum drying oven and dried at 50-60°C for 4-5 h to obtain intermediate 3. A4: Add intermediate 3, triethylamine and dichloromethane to a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel. Add the chloroheptafluorobutyric acid solution dropwise with stirring at a temperature of -5-0°C and a stirring rate of 400-500 r / min. The dropping rate is controlled to 1-2 drops / s. After the addition is complete, continue stirring and reacting for 2-3 hours. Then, raise the temperature to 50-55°C and continue stirring and reacting for 2-3 hours. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, wash with distilled water 2-3 times, recrystallize with ethyl acetate, and rotary evaporate to remove the solvent to obtain a lubricating agent.

2. The low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire according to claim 1, characterized in that: The ABS resin is prepared by bulk process and has a melt index of 2-15 g / 10 min.

3. The low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire according to claim 1, characterized in that: The foaming temperature of the foaming masterbatch is 120-200° C. The masterbatch resin matrix of the foaming masterbatch is one of ABS, AS, HIPS, and SMA resins. The nucleating agent of the foaming masterbatch is one or more of talc, kaolin, and montmorillonite.

4. The low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire according to claim 1, characterized in that: The solid lubricant is a composite solid lubricant of zinc sulfide and phosphate in a mass ratio of 1:

1.

5. The low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire according to claim 1, characterized in that: The extreme pressure agent is fatty acid diethanolamine borate.

6. The low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire according to claim 1, characterized in that: The processing aid is one or a mixture of stearic acid, zinc stearate, and ethylene bisstearamide (EBS) in any mass ratio.

7. The method for preparing a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire according to claim 1, characterized in that: The following steps are involved: S1. Raw material mixing and granulation: ABS resin, solid lubricant, lubricating agent, extreme pressure agent, and processing aid are added to a twin-screw extruder according to a ratio and mixed and granulated to obtain modified ABS resin particles, wherein the temperature of the twin-screw extruder is set at 240-260°C; S2. Extrusion, calendering and cutting of liner: After the modified ABS resin particles and foaming masterbatch are stirred and mixed, they are added into an extrusion calender to extrude and draw the liner, and cut to a fixed length to prepare the blank. The extrusion temperature is set at 220-240°C and the extrusion speed is 0.2-5 mm / s; S3. Post-processing of cutting liner: Mill the six sides of the blank to meet the thickness accuracy of ±0.2mm, and then pull the surface to produce linear grooves along the length direction. The linear grooves have the following specifications: width 0.5-2mm, depth 0.1-0.3mm, and spacing 5-10mm. S4. Cleaning and packaging: After the blank is cut, it is cleaned and packaged to obtain a low-density wide-space cutting plastic liner suitable for ultra-fine diamond wire.

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