CN104889896A - Coated abrasive tool and production method thereof - Google Patents
Coated abrasive tool and production method thereof Download PDFInfo
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- CN104889896A CN104889896A CN201510368812.6A CN201510368812A CN104889896A CN 104889896 A CN104889896 A CN 104889896A CN 201510368812 A CN201510368812 A CN 201510368812A CN 104889896 A CN104889896 A CN 104889896A
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- mixed solution
- abrasive tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/02—Backings, e.g. foils, webs, mesh fabrics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/001—Manufacture of flexible abrasive materials
Abstract
The invention provides a coated abrasive tool comprising a base material layer, binding agent and an abrasive material. The coated abrasive tool is characterized in that the base material layer is a porous film; the porous film is obtained by applying a mixed solution of polyurethane resin, wood powder, defoaming agent, flatting agent and N, N-dimethylformamide to the surface of a fluffy cloth base and subjecting the cloth base to phase splitting and film forming in coagulating bath. The coated abrasive tool has the advantages that the coated abrasive tool wears slowly during use, service life is long, flex resistance, flexibility, elasticity and tensile strength are high and precision production requirements can be met.
Description
Technical field
The present invention relates to milling tool technical field, particularly a kind of coated abrasive tool and preparation method thereof.
Background technology
Coated abrasive tool refers to the grinding tool with binding agent abrasive material sticked on flexible substrates, is called as omnipotent grinder tool.Coated abrasive tool mainly acts on the operation such as grinding, polishing, wire drawing of various metal and non-metal workpiece, for improving the surface treatment quality of workpiece.The coated abrasive tool not only range of work is wide, and grinding efficiency is high, and can reach high dimensional accuracy and low surface roughness.
Three large key elements of coated abrasive tool are abrasive material, binding agent and matrix.Abrasive material is responsible for carrying out grinding to workpiece, and its soft or hard degree, granular size can show different surface effects, as the thickness of lines, and the size of fineness.Binding agent is responsible for its matrix and abrasive material to be bonded together, and the firmness of its bonding then determines the durability of this coated abrasive tool, as water-fast, acidproof, alkaline resistance properties etc.Matrix is the carrier of abrasive material and binding agent, not only soft and high resilience, is the leading factor that coated abrasive tool has flexing.
Usually coated abrasive tool used comprises paper base material grinding tool, cloth base material grinding tool and film substrate grinding tool.Wherein, range of application is the widest because having the advantages such as stretching resistance is good, indeformable, heat-resisting for cloth base material grinding tool.Cloth base material grinding tool coated various hard material and making on cloth base material, its fabricbase is knitted by cotton or synthetic fibers are made, and soaks into the high polymer of gaining in strength in cloth base matrix.Although cloth base material grinding tool has certain advantage, in use wear and tear very fast, service life is shorter.
Summary of the invention
The object of the present invention is to provide a kind of coated abrasive tool and preparation method thereof, coated abrasive tool provided by the invention in use loss is slow, long service life.
Technical scheme of the present invention is as follows:
The invention provides a kind of coated abrasive tool, comprise substrate layer, binding agent and abrasive material, it is characterized in that, described substrate layer is perforated membrane;
Described perforated membrane is coated on nylon loop primary surface by the mixed solution comprising polyurethane resin, wood powder, defoamer, levelling agent and DMF, and then in coagulating bath, phase-splitting film forming obtains.
Preferably, the elastic modelling quantity of described polyurethane resin is 30 ~ 80.
Preferably, the fine hair area coverage of described fluffing fabricbase is 85% ~ 95% of the fabricbase gross area.
Preferably, described villus length is 1mm ~ 3mm.
Preferably, described mixed solution is 180g/m at the coated weight of nylon loop primary surface
2~ 300g/m
2.
The invention provides a kind of preparation method of coated abrasive tool, comprise the following steps:
Polyurethane resin, wood powder, defoamer, levelling agent are mixed with DMF, obtains mixed solution;
After described mixed solution is coated in nylon loop primary surface, the fluffing fabricbase obtained is placed in coagulating bath phase-splitting film forming, obtains perforated membrane;
By binding agent and abrasive material mixing, obtain mortar;
Mortar is coated in porous film surface, obtains coated abrasive tool.
Preferably, described mixed solution comprises following component:
Polyurethane resin 90 parts ~ 110 parts;
DMF 80 parts ~ 120 parts;
Wood powder 20 parts ~ 40 parts;
Defoamer 0.1 part ~ 2 parts;
Levelling agent 0.1 part ~ 2 parts.
Preferably, described binding agent comprises following component:
Epoxy resin 90 parts ~ 110 parts;
Butyl ester 5 parts ~ 15 parts;
DMF 5 parts ~ 15 parts;
Modified polyamide 40 parts ~ 60 parts.
Preferably, described mortar comprises following component:
140 parts ~ 200 parts binding agents;
200 parts ~ 300 parts abrasive materials.
Preferably, the preparation method of described modified polyamide comprises the following steps:
Be that the polyamide of 250mg KOH/g ~ 350mg KOH/g carries out graft reaction by the butyronitrile of presulfurization and amine value, obtain modified polyamide;
The number-average molecular weight of described polyamide is 800 ~ 1600.
Preferably, the temperature of described graft reaction is 120 DEG C ~ 180 DEG C;
The time of described graft reaction is 1.5 hours ~ 3 hours.
The invention provides a kind of coated abrasive tool, comprise substrate layer, binding agent and abrasive material, it is characterized in that, described substrate layer is perforated membrane; Described perforated membrane is coated on nylon loop primary surface by the mixed solution comprising polyurethane resin, wood powder, defoamer, levelling agent and DMF, and then in coagulating bath, phase-splitting film forming obtains.In the present invention, described perforated membrane tool not only in use loss is slow, long service life, and has good resistance to tortuosity, pliability, elasticity and tensile strength, can meet accurate requirement of producing.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
The structural representation of the coated mould that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the process flow diagram of the coated perforated membrane of mortar in the embodiment of the present invention.
Description of reference numerals: 1-abrasive material; 2-binding agent; 3-substrate layer; 4-scraper; 5-flower roller; 6-baking oven.
Detailed description of the invention
The invention provides a kind of coated abrasive tool, comprise substrate layer, binding agent and abrasive material, described substrate layer is perforated membrane;
Described perforated membrane is coated on nylon loop primary surface by the mixed solution comprising polyurethane resin, wood powder, defoamer, levelling agent and DMF, and then in coagulating bath, phase-splitting film forming obtains.
Coated mould provided by the invention has good elasticity, can meet accurate requirement of producing.
As shown in Figure 1, the structural representation of the coated mould that Fig. 1 provides for the embodiment of the present invention, coated mould of the present invention comprises substrate layer, binding agent and abrasive material.
Coated mould provided by the invention comprises substrate layer, described substrate layer is perforated membrane, described perforated membrane is coated on nylon loop primary surface by the mixed solution comprising polyurethane resin, wood powder, defoamer, levelling agent and DMF, and then in coagulating bath, phase-splitting film forming obtains.In the present invention, described fabricbase is preferably TC cloth; The weaving manner of the present invention to described fabricbase does not have particular/special requirement, adopts the knitting skill that those skilled in the art adopt; In the present invention, the Density of described fabricbase is preferably (60 ~ 75) * (120 ~ 150), be more preferably (65 ~ 70) * (125 ~ 145), most preferably be (65 ~ 70) * (130 ~ 140); The thickness of described fabricbase is preferably 0.6mm ~ 1mm, and in an embodiment of the present invention, the thickness of described fabricbase can be specially 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.
In the present invention, described mixed solution is coated on the cloth primary surface of fluffing, and in the present invention, the fine hair area coverage of described fluffing fabricbase is preferably 85% ~ 95% of the fabricbase gross area, is more preferably 87% ~ 93%, most preferably is 89% ~ 92%.In the present invention, described villus length is preferably 1mm ~ 3mm, and in an embodiment of the present invention, described villus length can be specially 1mm, 2mm or 3mm.In the present invention, described mixed solution is preferably 180g/m at the coated weight of nylon loop primary surface
2~ 300g/m
2, be more preferably 200g/m
2~ 280g/m
2, most preferably be 220g/m
2~ 260g/m
2.
Coated mould provided by the invention comprises binding agent.In the present invention, particular/special requirement be there is no to described binding agent, adopt binding agent well known to those skilled in the art.In the present invention, described binding agent preferably includes following component:
Epoxy resin 90 parts ~ 110 parts;
Butyl ester 5 parts ~ 15 parts;
DMF 5 parts ~ 15 parts;
Modified polyamide 40 parts ~ 60 parts.
In the present invention, described binding agent preferably includes 90 parts ~ 110 parts epoxy resin, is more preferably 95 parts ~ 105 parts, most preferably is 98 parts ~ 102 parts.The present invention does not have particular/special requirement to described epoxy resin, adopts epoxy resin well-known to those skilled in the art.In an embodiment of the present invention, described epoxy resin is specially EP-20, EP-44 or EP-51.
In the present invention, described binding agent preferably includes 5 parts ~ 15 parts butyl esters, is more preferably 8 parts ~ 12 parts.The present invention does not have particular/special requirement to described fourth fat, adopts fourth fat well-known to those skilled in the art.
In the present invention, described binding agent preferably includes 5 parts ~ 15 parts DMFs, is more preferably 8 parts ~ 12 parts.The present invention does not have particular/special requirement to described DMF, adopts DMF well-known to those skilled in the art.
In the present invention, described binding agent preferably includes the modified polyamide of 40 parts ~ 60 parts, is more preferably 45 parts ~ 55 parts.In the present invention, described modified polyamide is preferably butyronitrile modified polyamide, and the preparation method of described modified polyamide preferably includes following steps:
Be that the polyamide of 250mg KOH/g ~ 350mg KOH/g carries out graft reaction by the butyronitrile of presulfurization and amine value, obtain modified polyamide;
The number-average molecular weight of described polyamide is 800 ~ 1600.
The concrete grammar of the present invention to the butyronitrile obtaining described presulfurization does not have particular/special requirement, adopts the method for pre-sulphuration of butyronitrile well known to those skilled in the art.In an embodiment of the present invention, the presulfurization of described butyronitrile is specially: in acrylonitrile-butadiene rubber, add sulfur vulcanizing agent 2wt%, activator ZnO 0.5wt%, promoter benzothiazole sulfide 1.5wt% and solvent nitropropane 5wt%, in 80 DEG C ~ 85 DEG C temperature ranges, stir 30 ~ 60 minutes under 1000 ~ 1500rpm rotating speed.
In the present invention, the mass ratio of described butyronitrile and described polyamide is preferably (5 ~ 15): (85 ~ 95), are more preferably (8 ~ 12): (88 ~ 92).The present invention does not have particular/special requirement to described fourth eyeball, adopts fourth eyeball well-known to those skilled in the art.In the present invention, the amine value of described polyamide is preferably 250mg KOH/g ~ 350mgKOH/g, is more preferably 280mg/g ~ 320mg/g; The number-average molecular weight of described polyamide is preferably 800 ~ 1600, is more preferably 1000 ~ 1500, most preferably is 1100 ~ 1400.
In the present invention, the temperature of described graft reaction is preferably 120 DEG C ~ 180 DEG C, is more preferably 130 DEG C ~ 170 DEG C, most preferably is 140 DEG C ~ 160 DEG C.In the present invention, the time of described graft reaction is preferably 1.5 hours ~ 3 hours, is more preferably 1.8 hours ~ 2.8 hours, most preferably is 2 hours ~ 2.5 hours.
Coated mould provided by the invention comprises abrasive material, and the present invention does not have particular/special requirement to described abrasive material, adopts abrasive material well-known to those skilled in the art.In the present invention, described abrasive material preferably adopts one or more in carborundum, black corundum, white fused alumina and Brown Alundum, concrete described abrasive material be one in carborundum, black corundum, white fused alumina and Brown Alundum, two kinds, three kinds or four kinds.The granularity of the present invention to described abrasive material does not have particular/special requirement, and in embodiments of the present invention, the granularity of abrasive material used is preferably 400#.
The invention provides a kind of preparation method of coated abrasive tool, comprise the following steps:
Polyurethane resin, wood powder, defoamer, levelling agent are mixed with DMF, obtains mixed solution;
After described mixed solution is coated in nylon loop primary surface, the fluffing fabricbase obtained is placed in coagulating bath phase-splitting film forming, obtains perforated membrane;
To mix with abrasive material, obtain mortar;
Mortar is coated in described porous film surface, obtains coated abrasive tool.
Polyurethane resin, wood powder, defoamer, levelling agent mix with DMF by the present invention, obtain mixed solution.In the present invention, according to the mass fraction, described mixed solution comprises following component:
Polyurethane resin 90 parts ~ 110 parts;
DMF 80 parts ~ 120 parts;
Wood powder 20 parts ~ 40 parts;
Defoamer 0.1 part ~ 2 parts;
Levelling agent 0.1 part ~ 2 parts.
In the present invention, described mixed solution preferably includes 90 parts ~ 110 parts polyurethane resins, is more preferably 95 parts ~ 105 parts, most preferably is 98 parts ~ 103 parts.In the present invention, the elastic modelling quantity of described polyurethane resin is preferably 30 ~ 80, is more preferably 40 ~ 70, most preferably is 50 ~ 60.
In the present invention, described mixed solution preferably includes 80 parts ~ 120 parts DMFs, is more preferably 90 parts ~ 110 parts, most preferably is 95 parts ~ 105 parts.In the present invention, described DMF is the solvent of mixed solution.
In the present invention, described mixed solution preferably includes 20 parts ~ 40 parts wood powders, is more preferably 25 parts ~ 35 parts, most preferably is 28 parts ~ 32 parts.In the present invention, the granularity of described wood powder is preferably greater than 600 orders.In the present invention, described wood powder can improve the tack of mixed solution.
In the present invention, described mixed solution preferably includes 0.1 part ~ 2 parts defoamers, is more preferably 0.5 part ~ 1.5 parts, most preferably is 0.8 part ~ 1.3 parts.In the present invention, described defoamer is preferably silicon defoamer; In embodiments of the present invention, the model of being produced by German Hua Ke company can be specifically adopted to be the defoamer of BYK-3099.In the present invention, described defoamer can reduce the surface tension of mixed solution, suppresses foam produce and eliminate the foam produced.
In the present invention, described mixed solution preferably includes 0.1 part ~ 2 parts levelling agents, is more preferably 0.5 part ~ 1.5 parts, most preferably is 0.8 part ~ 1.3 parts.In the present invention, described levelling agent is preferably type siloxane levelling agent; In embodiments of the present invention, the model of being produced by German Hua Ke company can be specifically adopted to be the levelling agent of BYK-333.In the present invention, described levelling agent can reduce the surface tension of mixed solution, improves levelability and the uniformity of mixed solution.
In the present invention, each raw material components of above-mentioned mixed solution is commercial goods.
Polyurethane resin, wood powder, defoamer, levelling agent preferably mix with DMF by the present invention, obtain mixed solution.After obtaining mixed solution, preferably described mixed solution is disperseed.The method of the present invention to described dispersion does not have particular/special requirement, adopts dispersion technology scheme well-known to those skilled in the art.In the present invention, preferably on high speed dispersor, described mixed solution is disperseed; The speed of described dispersion is preferably 1000rpm ~ 1400rpm, is more preferably 1100rpm ~ 1300rpm, most preferably is 1150rpm ~ 1250rpm; The time of described dispersion is preferably 20 minutes ~ 60 minutes, is more preferably 30 minutes ~ 50 minutes, most preferably is 35 minutes ~ 45 minutes.
Mixed solution preferably disperses by the present invention.In the present invention, after being disperseed by mixed solution, preferably carry out deaeration to the mixed solution after dispersion, de-aeration can be taken the air brought in mixed liquor away, sloughs bubble.The present invention does not have particular/special requirement to described deaeration technology, adopts deaeration technology well-known to those skilled in the art.
After obtaining mixed solution, after described mixed solution is coated in nylon loop primary surface by the present invention, the fluffing fabricbase obtained is placed in coagulating bath phase-splitting film forming, obtains perforated membrane.In the present invention, described fluffing fabricbase is consistent with the technical scheme of the fluffing fabricbase described in technique scheme, does not repeat them here.The method of the present invention to described coating does not have special restriction, adopts the technical scheme of coating well known to those skilled in the art, as being coated with or roller coat for brushing, turning.The present invention does not have particular/special requirement to the phase-splitting film technique in described coagulating bath, adopts phase-splitting film technique well-known to those skilled in the art.In the present invention, described coagulating bath is preferably water; In an embodiment of the present invention, the fabricbase being coated with mixed solution is put into water, allow its freezing film.The kind of the present invention to described water does not have particular/special requirement, adopts water well known to those skilled in the art; In the present invention, described water is preferably pure water.
The present invention, by binding agent and abrasive material mixing, obtains mortar.In the present invention, according to the mass fraction, described mortar preferably includes following component:
140 parts ~ 200 parts binding agents;
200 parts ~ 300 parts abrasive materials.
The hybrid mode of the present invention to described mortar does not have particular/special requirement, adopts hybrid mode well known to those skilled in the art.In the present invention, epoxy resin is preferably dissolved in the mixed solvent of butyl ester and DMF composition by described hybrid mode, obtains resin solution; In described resin solution, add modified polyamide, stir; After described stirring, then add abrasive material, obtain mortar.
In the present invention, described mortar preferably includes 140 parts ~ 200 parts binding agents, is more preferably 150 parts ~ 190 parts, most preferably is 160 parts ~ 180 parts.In the present invention, described binding agent is consistent with the technical scheme of binding agent described in technique scheme, does not repeat them here.
In the present invention, described mortar preferably includes 200 parts ~ 300 parts abrasive materials, is more preferably 220 parts ~ 280 parts, most preferably is 240 parts ~ 260 parts.In the present invention, described abrasive material is consistent with the technical scheme of abrasive material described in technique scheme, does not repeat them here.
In the present invention, described epoxy resin, butyl ester, DMF butyronitrile, polyamide and abrasive material are commercially available prod.
Mortar is coated in described porous film surface by the present invention, obtains coated abrasive tool.The present invention does not have particular/special requirement to coating method mortar being coated in porous film surface, adopts coating method well known to those skilled in the art, as being spin coating, brushing or roller coat.In the present invention, described coating method preferably adopts roll coating model.In an embodiment of the present invention, can specifically adopt the technological process shown in Fig. 2 that mortar is coated in described porous film surface, Fig. 2 is the process flow diagram of the coated perforated membrane of mortar in the embodiment of the present invention.In the present invention, described roller coat preferably adopts patterned roll, and the decorative pattern of the present invention to described patterned roll does not have specific requirement, can be any decorative pattern.In the present invention, described roller coat is specially: be placed on by described mortar in patterned roll dish, and patterned roll is rotated and driven mortar to be attached in patterned roll, and blown off by unnecessary mortar scraper, remaining mortar is transferred on perforated membrane, obtains coated mould.In the present invention, the order number of described patterned roll is preferably 50# ~ 70#, is more preferably 55# ~ 65#, most preferably is 58# ~ 62#.
Complete described mortar after the coating of porous film surface, the product obtained preferably is carried out drying by the present invention, obtains coated mould.The method of the present invention to described drying does not have particular/special requirement, adopts dry technology scheme well known to those skilled in the art.In the present invention, described drying is preferably and dries.In an embodiment of the present invention, the drying mode in the technological process shown in Fig. 2 can be specifically adopted to carry out drying to the described product obtained.In the present invention, described drying is specially and puts the coated mould obtained on a moving belt through oven drying.In the present invention, described baking temperature is preferably 120 DEG C ~ 170 DEG C, is more preferably 130 DEG C ~ 160 DEG C, most preferably is 140 DEG C ~ 150 DEG C; Be preferably 20 minutes ~ 50 minutes described drying time, be more preferably 25 minutes ~ 45 minutes, most preferably be 30 minutes ~ 40 minutes.In the present invention, the speed of described conveyer belt is preferably 3 ~ 8 ms/min, and in an embodiment of the present invention, the speed of described conveyer belt can be specially 3 ms/min, 4 ms/min, 5 ms/min, 6 ms/min, 7 ms/min and 8 ms/min.
The invention provides a kind of coated abrasive tool, comprise substrate layer, binding agent and abrasive material, described substrate layer is perforated membrane; Described perforated membrane is coated on nylon loop primary surface by the mixed solution comprising polyurethane resin, wood powder, defoamer, levelling agent and DMF, and then in coagulating bath, phase-splitting film forming obtains.In the present invention, by comprising polyurethane resin, wood powder, defoamer, levelling agent and N, the mixed solution of N-dimethylformamide is coated on nylon loop primary surface, then in coagulating bath, phase-splitting film forming obtains perforated membrane and has good resistance to tortuosity, pliability and tensile strength, the coated mould obtained by described perforated membrane has good elasticity, can meet accurate requirement of producing.The coated abrasive tool that the present invention obtains in use loss is slow, long service life.
Below in conjunction with the embodiment in the present invention, the technical scheme in the present invention is clearly and completely described.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In the following embodiments, raw material is commercial goods, concrete, and defoamer is the model that German Bi Ke company produces is the defoamer of BYK-3099; Levelling agent is the model that German Bi Ke company produces is the levelling agent of BYK-333.
Embodiment 1:
Be the polyurethane resin 90 parts of 30, DMF solvent 80 parts, wood powder 20 parts, defoamer 0.1 part and levelling agent 0.1 part mixing by elastic modelling quantity, obtain mixed solution.
By the mixed solution that obtains on high speed dispersor with the Rate Dispersion 20 minutes of 1000rpm; Then dispersion after mixed solution through vacuum machine deaeration.
Be coated in by mixed solution after above-mentioned deaeration on TC fabricbase that the Density fluffed is 60*120, coated weight is 180g/m
2, the fine hair area coverage of fabricbase is 85% of the fabricbase gross area, and villus length is about 2mm.
The fabricbase being coated with mixed solution is placed in clear water phase-splitting film forming, obtains perforated membrane.
Sulfur vulcanizing agent 2wt%, activator ZnO 0.5wt%, promoter benzothiazole sulfide 1.5wt% and solvent nitropropane 5wt% is added in acrylonitrile-butadiene rubber, in 80 DEG C of temperature ranges, stir 30 minutes under 1000 ~ 1500rpm rotating speed, obtain presulfurization butyronitrile.
To be 250mg KOH/g number-average molecular weight with 95 parts of amine values by 5 parts of good for presulfurization butyronitrile at temperature is 120 DEG C be 800 polyamide reaction 1.5 hours, make modified polyamide.
The epoxy resin-20 of 90 parts is dissolved in the mixed solvent of 5 parts of butyl esters and 5 parts of DMFs, obtains resin solution; In resin solution, add 40 parts of modified polyamides again, stir; Add the white fused alumina of 200 parts of 400# after mixing again wherein, stir, obtain mortar.
Above-mentioned mortar is placed in patterned roll dish, patterned roll is contacted with mortar.Mortar is driven to be attached in patterned roll when patterned roll is rotated, scraper blows unnecessary mortar off, remaining mortar is transferred to be put on a moving belt and on the perforated membrane contacted with patterned roll, the perforated membrane being coated with mortar is sent to baking oven inner drying with conveyer belt, bake out temperature is 120 DEG C, line speed is 3 ms/min, and drying time is 20 minutes, obtains coated mould A.
The present invention detects the grinding capacity of the coated mould A obtained and abrasion-resistance, and wherein the rotating speed of grinding capacity test experience is 12000rpm, and grinding object is aluminium sheet; The rotating speed of abrasion-resistance test experience is 12000rpm, and grinding object is aluminium sheet.
As shown in Table 1 and Table 2, table 1 is products and marketing existing product grinding capacity contrast table of the present invention to testing result, and table 2 is products and marketing existing product abrasion-resistance contrast table of the present invention.
Embodiment 2:
Be the polyurethane resin 100 parts of 50, DMF solvent 100 parts, wood powder 30 parts, defoamer 1 part and levelling agent 1 part mixing by elastic modelling quantity, obtain mixed solution.
By the mixed solution that obtains on high speed dispersor with the Rate Dispersion 40 minutes of 1200rpm.Then dispersion after mixed solution through vacuum machine deaeration.
Be coated in by mixed solution after above-mentioned deaeration on TC fabricbase that the Density fluffed is 70*130, coated weight is 240g/m
2, the fine hair area coverage of fabricbase is 90% of the fabricbase gross area, and villus length is about 2mm.
The fabricbase being coated with mixed solution is placed in clear water phase-splitting film forming, obtains perforated membrane.
Sulfur vulcanizing agent 2wt%, activator ZnO 0.5wt%, promoter benzothiazole sulfide 1.5wt% and solvent nitropropane 5wt% is added in acrylonitrile-butadiene rubber, in 82 DEG C of temperature ranges, stir 40 minutes under 1000 ~ 1500rpm rotating speed, obtain presulfurization butyronitrile.
Be 300mg KOH/g with 90 parts of amine values by 10 parts of good for presulfurization butyronitrile at temperature is 150 DEG C, number-average molecular weight be 1000 polyamide reaction 2 hours, make modified polyamide.
The epoxy resin-44 of 100 parts is dissolved in the mixed solvent of 10 parts of butyl esters and 10 parts of DMFs, obtains resin solution, then in resin solution, add 50 parts of modified polyamides, stir; Mix the black corundum adding 250 parts of 400# more wherein, stir, obtain mortar.
Above-mentioned mortar is placed in patterned roll dish, patterned roll is contacted with mortar.Mortar is driven to be attached in patterned roll when patterned roll is rotated, scraper blows unnecessary mortar off, remaining mortar is transferred to be put on a moving belt and on the perforated membrane contacted with patterned roll, the perforated membrane being coated with mortar is sent to baking oven inner drying with conveyer belt, bake out temperature is 120 DEG C, line speed is 3 ms/min, and drying time is 20 minutes, obtains coated mould B.
The present invention detects the grinding capacity of the coated mould B that the present embodiment obtains and abrasion-resistance according to the detection method of embodiment 1 and testing conditions, and testing result as shown in Table 1 and Table 2.
Embodiment 3:
Be the polyurethane resin 110 parts of 80, DMF solvent 120 parts, wood powder 40 parts, defoamer 2 parts and levelling agent 2 parts mixing by elastic modelling quantity, obtain mixed solution.
By the mixed solution that obtains on high speed dispersor with the Rate Dispersion 60 minutes of 1400rpm; Then dispersion after mixed solution through vacuum machine deaeration.
Be coated in by mixed solution after above-mentioned deaeration on TC fabricbase that the Density fluffed is 75*150, coated weight is 300g/m
2, the fine hair area coverage of fabricbase is 95% of the fabricbase gross area, and villus length is about 2mm.
The fabricbase being coated with mixed solution is placed in clear water phase-splitting film forming, obtains perforated membrane.
Sulfur vulcanizing agent 2wt%, activator ZnO 0.5wt%, promoter benzothiazole sulfide 1.5wt% and solvent nitropropane 5wt% is added in acrylonitrile-butadiene rubber, in 85 DEG C of temperature ranges, stir 50 minutes under 1000 ~ 1500rpm rotating speed, obtain presulfurization butyronitrile.
Be 350mg KOH/g with 85 parts of amine values by 15 parts of good for presulfurization butyronitrile at temperature is 180 DEG C, number-average molecular weight be 1600 polyamide reaction 3 hours, make modified polyamide.
The epoxy resin-51 of 110 parts is dissolved in the mixed solvent of 15 parts of butyl esters and 15 parts of DMFs, obtains resin solution; In resin solution, add 60 parts of modified polyamides again, stir; Add the carborundum of 300 parts of 400# after mixing again wherein, stir, obtain mortar.
Above-mentioned mortar is placed in patterned roll dish, patterned roll is contacted with mortar.Mortar is driven to be attached in patterned roll when patterned roll is rotated, scraper blows unnecessary mortar off, remaining mortar is transferred to be put on a moving belt and on the perforated membrane contacted with patterned roll, the perforated membrane being coated with mortar is sent to baking oven inner drying with conveyer belt, bake out temperature is 180 DEG C, line speed is 5 ms/min, and drying time is 40 minutes, obtains coated mould C.
The present invention detects the grinding capacity of the coated mould C that the present embodiment obtains and abrasion-resistance according to the detection method of embodiment 1 and testing conditions, and testing result as shown in Table 1 and Table 2.
Table 1 products and marketing existing product of the present invention grinding capacity contrast table
| Title | The grinding time | Stock removal |
| Coated mould A | 1 minute | 5.8g |
| Coated mould B | 1 minute | 5.6g |
| Coated mould C | 1 minute | 6.1g |
| The existing coated mould in market | 1 minute | 4.2g |
As can be seen from Table 1, the grinding capacity of coated abrasive tool provided by the invention improves 39% compared with coated abrasive tool existing on market, is far superior to existing product.
Table 2 products and marketing existing product of the present invention abrasion-resistance contrast table
Ra-profile arithmetic average error: in sample length, the arithmetic mean of instantaneous value of profile offset distance absolute value.
Rz-nao-and micro relief 10 height: the mean value of profile peak height maximum in sample length and the dark mean value sum of five maximum profile paddy.
As can be seen from Table 2, the application's product grinding after 1 minute compared with after grinding 10 second, its roughness on average declines 12.15%, and on market existing product grinding after 1 minute compared with after grinding 10 second, its roughness on average declines 36.55%.Data result in watch 2 show coated abrasive tool that the application obtains comparatively on market existing product more in use loss slow, more durable.
Found out by above experimental result, coated abrasive tool provided by the invention not only has better grinding force, and in use loss is slow, long service life.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a coated abrasive tool, comprises substrate layer, binding agent and abrasive material, it is characterized in that, described substrate layer is perforated membrane;
Described perforated membrane is coated on nylon loop primary surface by the mixed solution comprising polyurethane resin, wood powder, defoamer, levelling agent and DMF, and then in coagulating bath, phase-splitting film forming obtains.
2. according to claim 1 coated abrasive tool, it is characterized in that, the elastic modelling quantity of described polyurethane resin is 30 ~ 80.
3. according to claim 1 coated abrasive tool, it is characterized in that, the fine hair area coverage of described fluffing fabricbase is 85% ~ 95% of the fabricbase gross area, and villus length is 1mm ~ 3mm.
4. according to claim 1 coated abrasive tool, it is characterized in that, described mixed solution is 180g/m at the coated weight of nylon loop primary surface
2~ 300g/m
2.
5. a preparation method for coated abrasive tool, comprises the following steps:
Polyurethane resin, wood powder, defoamer, levelling agent are mixed with DMF, obtains mixed solution;
After described mixed solution is coated in nylon loop primary surface, the fluffing fabricbase obtained is placed in coagulating bath phase-splitting film forming, obtains perforated membrane;
By binding agent and abrasive material mixing, obtain mortar;
Mortar is coated in porous film surface, obtains coated abrasive tool.
6. preparation method according to claim 5, is characterized in that, described mixed solution comprises following component:
Polyurethane resin 90 parts ~ 110 parts;
DMF 80 parts ~ 120 parts;
Wood powder 20 parts ~ 40 parts;
Defoamer 0.1 part ~ 2 parts;
Levelling agent 0.1 part ~ 2 parts.
7. preparation method according to claim 5, is characterized in that, described binding agent comprises following component:
Epoxy resin 90 parts ~ 110 parts;
Butyl ester 5 parts ~ 15 parts;
DMF 5 parts ~ 15 parts;
Modified polyamide 40 parts ~ 60 parts.
8. preparation method according to claim 5, is characterized in that, described mortar comprises following component:
140 parts ~ 200 parts binding agents;
200 parts ~ 300 parts abrasive materials.
9. preparation method according to claim 7, is characterized in that, the preparation method of described modified polyamide comprises the following steps:
Be that the polyamide of 250mg KOH/g ~ 350mg KOH/g carries out graft reaction by the butyronitrile of presulfurization and amine value, obtain modified polyamide;
The number-average molecular weight of described polyamide is 800 ~ 1600.
10. preparation method according to claim 9, is characterized in that, the temperature of described graft reaction is 120 DEG C ~ 180 DEG C;
The time of described graft reaction is 1.5 hours ~ 3 hours.
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| CN104889896B (en) | 2017-09-26 |
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Address after: 511853 No. 1 Building, No. 2 Nianfeng Road, Yingfu Industrial Park, Taiping Town, Qingxin District, Qingyuan City, Guangdong Province Patentee after: QINGYUAN BAIJIA GRINDING TECHNOLOGY Co.,Ltd. Address before: 511500 No. 5, No. 30 Qingdao West, Taihe Town, Qingxin District, Qingyuan City, Guangdong Province Patentee before: QINGYUAN BAIJIA GRINDING TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20220825 Address after: 511873 Factory Building No. 13, Nanbei Xiaxin Village, Taiping Town, Qingxin District, Qingyuan City, Guangdong Province Patentee after: Qingyuan Baiyou Abrasive Materials Co.,Ltd. Address before: 511853 No. 1 Building, No. 2 Nianfeng Road, Yingfu Industrial Park, Taiping Town, Qingxin District, Qingyuan City, Guangdong Province Patentee before: QINGYUAN BAIJIA GRINDING TECHNOLOGY Co.,Ltd. |