Preparation method of carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt

Abstract

The invention discloses a preparation method of a carbon fiber composite material resin base cloth for a superhard and wear-resistant abrasive belt, and the carbon fiber composite material resin base cloth for the superhard and wear-resistant abrasive belt prepared by the method provided by the invention has the advantages that under the dual effects of compounding a plurality of carbon fiber fabrics and compounding resin and fabrics, the wear resistance is good; the resin base cloth has the excellent characteristics of high strength, good friction resistance and the like, and particularly, resin finishing is innovatively adopted, so that the product also has the properties of heat conduction, heat dissipation and reduction of heating of the base cloth due to friction, an abrasive can be more firmly attached to the base cloth, and the service life of an abrasive grinding tool is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of abrasive belt base cloths, and in particular relates to a method for preparing a carbon fiber composite material resin base cloth for a superhard and wear-resistant abrasive belt. Background Art

[0002] Traditional abrasive belt base fabrics are made of cotton fiber, polyester fiber or polyester / cotton blended fiber. In the past two or three decades, fiber materials have developed rapidly, and fiber materials that can be used to prepare abrasive belt base fabrics have continued to emerge.

[0003] In recent years, high-performance carbon fiber reinforced / resin-based composite materials have been widely used in military and civilian fields. At present, carbon fiber reinforced / metal-based composite materials have gradually entered the initial stage of industrial application. Looking forward to the future industry, carbon fiber reinforced / ceramic-based composite materials and the above two composite materials will become the main force of new materials and will be widely used in many fields of the national economy. Precision grinding tools for grinding the surface of difficult-to-machine workpieces made of composite materials are currently and in the future the "bottleneck" restricting the development of mechanical processing.

[0004] The preparation process of traditional abrasive belt base fabric includes warp sizing, warping, weaving, singeing, desizing, shaping and other processes. Its disadvantages are long production process, wastewater generation, poor production environment, and it is difficult to effectively solve many problems such as coloring the back layer of the base fabric. Summary of the invention

[0005] The present invention aims at the deficiencies of the above-mentioned prior art and provides a method for preparing a carbon fiber composite resin base cloth for superhard and wear-resistant abrasive belts. The carbon fiber composite resin base cloth for superhard and wear-resistant abrasive belts prepared by the method of the present invention has excellent characteristics such as high strength and good friction resistance under the dual effects of multiple carbon fiber fabric composites and resin and fabric composites. In particular, the innovative use of resin finishing makes the product also have the performance of heat conduction, heat dissipation, and reducing the heat generation of the base cloth due to friction, which can make the abrasive more firmly attached to the base cloth and extend the service life of the abrasives and grinding tools.

[0006] The objects of the present invention are achieved in the following ways.

[0007] A method for preparing a carbon fiber composite material resin base cloth for a superhard and wear-resistant abrasive belt, the method comprising the following steps:

[0008] (1) Single-layer fabric weaving: woven fabric or non-woven fabric made of single carbon fiber or multiple fibers; the woven fabric is woven fabric, knitted fabric, woven / knitted composite fabric or non-woven fabric;

[0009] (2) Fabric layer compounding: Compounding multiple layers of fabric, wherein at least one layer of carbon fiber fabric is contained, and the composite multi-layer fabric has a unit area weight of 120-400g / m 2 The weight per unit area of ​​the composite multi-layer fabric is preferably 200-360g / m 2 ;The thickness of the composite fabric is 0.3mm-1.2mm;

[0010] (3) Resin finishing: The composite fabric layer is impregnated and permeated with resin liquid; the amount of glue applied is 5-20%, the solid content is 40-50%, the viscosity of the resin liquid is 200-300CP, the processing temperature is 40-70°C, and the roller pressure is 5-10kg / cm 2 ;

[0011] (4) Hot rolling treatment: After pre-drying the resin-finished fabric, a two-roller rolling mill is used to hot press the resin base fabric. One side of the base fabric is granular or striped. The lower roller of the two-roller rolling mill is a steel roller, and the upper roller is a copper roller with granular or striped patterns. The roller pressure is 5-8kg / cm 2 , pre-baking temperature 40-60℃, hot rolling temperature 60-80℃, particle or stripe depth 0.1-0.3mm;

[0012] (5) Heat setting treatment: The resin base fabric that has been subjected to hot rolling treatment is heat set in a heat setting machine; the heat setting machine speed is 15-30 m / min, the heat setting temperature is 110-135° C., and the heat setting time is 15-25 seconds.

[0013] Preferably, the fiber material in step (1) is a high-performance fiber, specifically one or more of carbon fiber continuous filaments, high-strength nylon filaments, polytetrafluoroethylene film split filaments, high-strength glass fiber filaments, basalt bulked yarns, alkali-free glass fiber filaments, recycled carbon fiber staple fibers, or high-temperature resistant filter bag recycled staple fibers; the fineness of the filaments is 400dtex-1800dtex, preferably 800dtex-1300dtex, and the length of the staple fibers is 4mm-50mm. Most preferably, the fiber material in step (1) is carbon fiber continuous filaments, and one or more of polytetrafluoroethylene film split filaments, high-strength glass fiber filaments, basalt bulked yarns, alkali-free glass fiber filaments, or high-temperature resistant filter bag recycled staple fibers.

[0014] Preferably, the fabric has a unit mass of 70-130 g / m 2 , nonwoven fabric unit mass 40-60g / m 2 .

[0015] Preferably, the thickness of the fabric layer in step (2) is 0.5 mm-1.0 mm, and the strength of the fabric layer is 1200-1800 N / 5 cm.

[0016] Preferably, the compounding is performed by bundling nylon filaments into multiple fabric layers on a stitch-bonding machine or by compounding on a multi-functional compounding machine.

[0017] The resin finishing is achieved by running several layers of fabric synchronously and in the same direction on a compounding machine, dipping them in a mucus tank, and bonding them through a padder or by using a foam coating method.

[0018] Preferably, step (2) is compounded by a one-time padding method.

[0019] Preferably, the resin solution in step (3) comprises the following components in percentage by weight:

[0020] Epoxy resin 20-40%, phenolic resin 20-40%, ABS resin 10-20%, amino plastic resin 5-10%, acrylate emulsion 5-20%, inorganic pigment 0.5-1.0%, conductive carbon powder 0.5-1.0%, talc 1-2%, cross-linking agent 1.0-1.5%, surface affinity agent 1.0-2.0%, thermosetting adhesive 0.2-0.5%, antistatic agent 0.4-0.9%, and the rest is water.

[0021] The resin liquid contains a variety of mixed resins, coatings, inorganic pigments and auxiliary materials; the mixed resins and coatings include epoxy resins, phenolic resins, ABS resins, amino plastic resins, acrylic emulsions, etc.; the inorganic pigments are mineral pigments of various colors; the auxiliary materials include conventional antistatic, heat dissipation, thermal conductivity functional materials, talcum powder, cross-linking agents, surface affinity agents and other ingredients.

[0022] The role of mixed resin is to utilize the advantages of multiple resins, give play to the complementary role of resins, strengthen the penetration of resin into fabrics, and enhance the strength of composite base fabrics; inorganic pigments are used to give fabric layers different colors, distinguish different brands of abrasives, print trademarks, company names, product models and other logos. Auxiliary materials can dissipate the heat accumulated in the base fabric due to long-term friction through heat conduction, and have the function of reducing surface friction.

[0023] Preferably, the heat setting machine speed in step (5) is 20-25 m / min, the heat setting temperature is 110-135° C., and the heat setting time is 15-25 seconds. The heat setting treatment is to perform the hot-rolled resin base fabric in a heat setting machine. This can stabilize the composite base fabric in shape and size, and keep the particles or stripes on the surface of the resin base fabric firm.

[0024] Preferably, the amount of glue applied in step (3) is 10-15%, the solid content is 40-50%; the viscosity of the treatment liquid is 200-300CP, the temperature is 50-60°C; the roller pressure is 6-8kg / cm 2 .

[0025] The "%" mentioned in the present invention refers to percentage by weight.

[0026] Compared with the existing technology, the beneficial effects of the present invention are:

[0027] (1) The method of the present invention innovatively adopts resin treatment, hot rolling treatment and other technical means to produce superhard and wear-resistant abrasive belts for grinding difficult-to-process parts made of carbon fiber reinforced / resin-based, metal-based, and ceramic-based composite materials for future industries. The product has the advantages of superhardness, wear resistance, and long service life.

[0028] (2) The composite of carbon fiber and other high-performance fiber materials, and the composite of carbon fiber and high-strength resin. The superposition effect of double composite can make the composite resin abrasive belt base cloth have more excellent performance, ensuring that the base cloth can meet the grinding quality requirements of the abrasive belt.

[0029] (3) The resin finishing liquid contains antistatic agents, heat dissipators, thermal conductors, talcum powder and other materials, which can help the sanding belt prevent static electricity, reduce the friction coefficient between the base fabric and other components, and reduce the surface temperature of the base fabric.

[0030] (4) The surface of the base cloth in contact with the abrasive particles is granular or striped, which enables the sanding belt to fix the abrasive particles more firmly, improve grinding efficiency, and extend the service life of the sanding belt.

[0031] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the following is accompanied by illustrations and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0033] Figure 1 It is a schematic structural diagram of a composite resin abrasive belt base cloth according to an embodiment of the present invention.

[0034] In the figure, 1 is a first fabric layer, 2 is a second fabric layer, 3 is a third fabric layer, 4 is a first adhesive layer, 5 is a second adhesive layer, and 6 is a composite resin base cloth.

[0035] Figure 2 The figure is a schematic diagram of the pattern of the abrasive attachment surface of the composite resin abrasive belt base cloth of the present invention.

[0036] In the figure, 7, the side of the composite resin abrasive belt base cloth in contact with the abrasive grains, 8, the first groove, 9, the second groove, 10, the composite resin abrasive belt base cloth.

[0037] Figure 3 Schematic diagram of the resin base fabric preparation process.

[0038] In the figure, (a) is a schematic diagram of the preparation process of the resin base cloth of the present invention; (b) is a schematic diagram of the preparation process of the traditional sanding belt base cloth. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. The compound machine used in the following embodiments is the multi-function compound machine disclosed in the embodiment of patent 202311664421X.

[0040] Example 1 Preparation of composite resin base fabric for black superhard, wear-resistant abrasive belt

[0041] 1. Carbon fiber continuous filament with a fineness of 1050 dtex is selected to weave plain fabric on a Picanol rapier loom as the first fabric layer 1, alkali-free glass fiber filament with a fineness of 1200 dtex is selected to weave plain fabric on a Picanol rapier loom as the second fabric layer 2, and basalt bulked yarn with a fineness of 1100 dtex is selected to weave looped knitted fabric on a warp knitting machine as the third fabric layer 3.

[0042] 2. The three single-layer fabrics are bundled into a multi-layer fabric layer with 450dtex nylon filament on a stitching machine. The unit weight of the multi-layer fabric layer is 305g / m 2 .

[0043] 3. Resin finishing: impregnate and permeate the composite fabric layer with resin liquid; glue amount 15%, solid content 45%, treatment liquid viscosity 260CP, treatment temperature 55-60℃, roller pressure 8kg / cm 2 On the composite machine, several layers of fabric are run synchronously and in the same direction, immersed in a mucus tank, and bonded by a padder.

[0044] The weight ratio of each component of the resin treatment liquid is as follows: 30% epoxy resin, 25% phenolic resin, 15% ABS resin, 8% amino plastic resin, 7% acrylic emulsion, 0.7% cobalt oxide brown black natural pigment, 0.8% conductive carbon powder, 1.6% talcum powder, 1.4% crosslinking agent, 1.2% surface affinity agent, 0.4% thermosetting adhesive, 0.7% antistatic agent, and the rest is water

[0045] 4. After pre-baking the resin-finished resin abrasive belt base cloth, hot-roll it with a two-roller rolling mill to obtain the resin base cloth. The lower roller of the two-roller rolling mill is a steel roller, and the upper roller is a copper carved roller with stripes, so that the side of the base cloth in contact with the abrasive particles is concave stripes, such as Figure 2The first groove 8 and the second groove 9 have a stripe groove depth of 0.3 mm. Heat treatment process: roller pressure 7 kg / cm 2 , pre-baking temperature 50±5℃, hot rolling temperature 75±5℃.

[0046] 5. The resin base fabric after hot rolling is set in a heat setting machine. Heat setting process: heat setting speed 25m / min, heat setting temperature 125±5℃, heat setting time 20±3 seconds.

[0047] 6. Physical and chemical performance indicators of resin base fabric: Weight per unit area 360g / m 2 , thickness 0.85mm, tensile strength 1850N / 5cm, elastic modulus 290GPa, fabric tearing strength 1280N / 5cm, friction coefficient 0.32.

[0048] Example 2 Preparation of a composite resin base fabric for brown-black superhard, wear-resistant abrasive belts

[0049] 1. High temperature resistant filter bags were used to recycle regenerated short fibers with a length of 10 mm to 20 mm. The fibers were mixed, combed, laid and needled into nonwoven fabrics as fabric 1. 800 dtex polytetrafluoroethylene film split filaments were used to weave plain fabrics on a Picanol rapier loom as fabric 2. 1300 dtex carbon fiber continuous filaments were used to weave plain fabrics on a Picanol rapier loom as fabric 3.

[0050] 2. Three single-layer fabrics are compounded into a multi-layer fabric layer on a compounding machine. The unit weight of the multi-layer fabric layer is 300g / m 2 .

[0051] 3. Resin finishing: impregnate and permeate the composite fabric layer with resin liquid; glue amount 15%, solid content 45%, resin liquid viscosity 260CP, processing temperature 55-60℃, roller pressure 8kg / cm 2 ; Several layers of fabric are run synchronously and in the same direction on the composite machine, immersed in the mucus tank, and bonded by the padder.

[0052] The weight ratios of the components of the resin liquid are as follows: 30% epoxy resin, 25% phenolic resin, 15% ABS resin, 8% amino plastic resin, 7% acrylic emulsion, 0.7% cobalt oxide brown-black natural pigment, 0.8% conductive carbon powder, 1.6% talcum powder, 1.4% cross-linking agent, 1.2% surface affinity agent, 0.4% thermosetting adhesive, 0.7% antistatic agent, and the rest is water.

[0053] 4. After pre-baking the resin-finished resin abrasive belt base cloth, use a two-roller rolling mill to hot-press the resin base cloth. The lower roller of the two-roller rolling mill is a steel roller, and the upper roller is a copper carved roller with stripes, so that the side of the base cloth in contact with the abrasive particles is concave stripes, such as Figure 2 The first groove 8 and the second groove 9 have a stripe groove depth of 0.3 mm.

[0054] Heat treatment process: roller pressure 8kg / cm 2 , pre-baking temperature 50±5℃, hot rolling temperature 75±5℃.

[0055] 5. The resin base fabric after hot rolling is set in a heat setting machine. Heat setting process: heat setting speed 25m / min, heat setting temperature 125±5℃, heat setting time 20±3 seconds.

[0056] 6. Physical and chemical performance indicators of resin base fabric: Weight per unit area 345g / m 2 , thickness 0.8mm, tensile strength 1800N / 5cm, elastic modulus 275GPa, fabric tearing strength 1200N / 5cm, friction coefficient 0.33.

[0057] Application Examples

[0058] Use Figure 3 (b) Polyester / cotton blended abrasive belt base fabric prepared by conventional process, the polyester / cotton blending ratio is 70:30, and the warp and weft yarn counts are 10 S and 8 S The warp and weft density is 16 threads / cm and 14 threads / cm, and the unit area weight is 205g / m 2 The fabric has a warp strength of 900N / 5cm, a weft strength of 650N / 5cm, and a breaking elongation of 1.5%. The abrasive made of the base fabric was used to grind the surface of a carbon fiber reinforced / resin-based composite material workpiece. The grinding time was 2.3 hours, and the abrasive belt was torn, damaged, and scrapped.

[0059] The composite base fabric prepared by the multilayer fabric of steps 1 and 2 of Example 1 of the present invention but not subjected to resin finishing and hot rolling treatment is ground with abrasives made of super-hard wear-resistant abrasive grains on the surface of the carbon fiber reinforced body / resin-based composite material workpiece, and the effective grinding time can reach 14 hours. However, as the grinding time increases, the surface temperature of the abrasive base fabric gradually increases, and the maximum surface temperature can reach 90°C. The fine dust generated by grinding is adsorbed on the surface of the abrasive and is difficult to remove.

[0060] The composite resin base cloth prepared by the method of Example 1 of the present invention and the abrasive prepared with the same abrasive particles are used to process the same composite workpiece. The thermal conductivity of the resin base cloth is increased from 150 W / mk to 175 W / mk, and the friction temperature of the substrate surface is maintained at 70-75°C, which is reduced by 15±5°C.

Claims

1. A method for preparing a carbon fiber composite resin base fabric for superhard and wear-resistant abrasive belts, characterized in that The method comprises the following steps: (1) Single-layer fabric weaving: woven fabric or non-woven fabric made of single fiber or multiple fibers; the woven fabric is woven fabric, knitted fabric, woven / knitted composite fabric or non-woven fabric; (2) Fabric layer compounding: Compounding multiple layers of fabric, wherein at least one layer of carbon fiber fabric is contained, and the composite multiple layers of fabric have a unit area weight of 120-400g / m 2 ; (3) Resin finishing: The composite fabric layer is impregnated and permeated with resin liquid; the amount of glue applied is 5-20%, the solid content is 40-50%, the viscosity of the resin liquid is 200-300CP, the processing temperature is 40-70°C, and the roller pressure is 5-10kg / cm 2 ; (4) Hot rolling treatment: After pre-drying the resin-finished fabric, a two-roller rolling mill is used to hot press the resin base fabric. One side of the base fabric is granular or striped. The lower roller of the two-roller rolling mill is a steel roller, and the upper roller is a copper roller with granular or striped patterns. The roller pressure is 5-8kg / cm 2 , pre-baking temperature 40-60℃, hot rolling temperature 60-80℃, particle or stripe depth 0.1-0.3mm; (5) Heat setting treatment: The resin base fabric that has been subjected to hot rolling treatment is heat set in a heat setting machine; the heat setting machine speed is 15-30 m / min, the heat setting temperature is 110-135° C., and the heat setting time is 15-25 seconds.

2. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that In the step (1), the fiber material is one or more of carbon fiber continuous filaments, high-strength nylon filaments, polytetrafluoroethylene film split filaments, high-strength glass fiber filaments, basalt bulked yarns, alkali-free glass fiber filaments or recycled carbon fiber staple fibers, and high-temperature resistant filter bag recycled staple fibers; the fineness of the filaments is 400dtex-1800dtex, and the length of the staple fibers is 4mm-50mm.

3. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The fabric unit mass is 70-130g / m 2 , nonwoven fabric unit mass 40-60g / m 2 .

4. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The thickness of the fabric layer in step (2) is 0.5 mm-1.0 mm, and the strength of the fabric layer is 1200-1800 N / 5 cm.

5. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The compounding is to bundle nylon filaments into multiple fabric layers on a stitching machine or to compound on a multifunctional compounding machine.

6. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The resin finishing is achieved by running several layers of fabric synchronously and in the same direction on a compounding machine, dipping them in a mucus tank, and bonding them through a padder or by using a foam coating method.

7. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The step (2) is compounded by a one-time padding method.

8. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The resin solution in step (3) comprises the following components in percentage by weight: 20-40% epoxy resin, 20-40% phenolic resin, 10-20% ABS resin, 5-10% amino plastic resin, 5-20% acrylate emulsion, 0.5-1.0% inorganic pigment, 0.5-1.0% conductive carbon powder, 1-2% talcum powder, 1.0-1.5% cross-linking agent, 1.0-2.0% surface affinity agent, 0.2-0.5% thermosetting adhesive, 0.4-0.9% antistatic agent, and the remainder is water.

9. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The heat setting machine speed in step (5) is 20-25 m / min, the heat setting temperature is 110-135° C., and the heat setting time is 15-25 seconds.

10. The method for preparing the carbon fiber composite material resin base cloth for superhard and wear-resistant abrasive belt according to claim 1, characterized in that The amount of glue applied in step (3) is 10-15%, the solid content is 40-50%; the viscosity of the treatment liquid is 200-300CP, the temperature is 50-60°C; the roller pressure is 6-8kg / cm 2 .

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