Background technology
The vulcan fibre emery disc claims vulcan fibre abrasive disc, high speed abrasive disc, abrasive disk again, and it is to be base material with the vulcan fibre, is a kind of plate-like coated abrasive tool that binding agent is made with synthetic resin.Its tensile strength is big, the wearability extra-heavy, can be installed on the electronic or pneumatic electric angle grinder to metal and the various profiles of nonmetallic materials eliminate rust, deburring, coating removal, polishing welding seams, the ideal tools that is grinding in furniture manufacturing and the repair of machine work, polishes, polishes is widely used in timber, furniture, shipbuilding, metallurgy, automobile, machinery, instrument, bridge and building trade.
At present, both at home and abroad to the research of vulcan fibre emery disc with use morely, be mainly reflected in and improve application performance and anti-deformation aspect of performance.CN201420209Y has proposed a kind of new waterleaf paper for velcanized fiber, mainly is evenly to be coated with the strong fibrage that one deck is made by cotton fiber on the vulcan fibre surface, makes that the parchmentizing of body paper is effective, water imbibition is strong.CN201419364Y has proposed a kind of high strength steel cardboard, mainly is to have zinc chloride gel layer in vulcanized fiber board basic unit, makes that its service time is longer, grinding effect is better.CN101180159A has improved the distortion situation of vulcan fibre emery disc significantly by the vulcan fibre backing is handled effectively, has improved service life simultaneously.CN200939582Y has proposed a kind of enhancing noise reduction vulcan fibre emery disc, mainly is by increasing well-regulated open-work and curved grooves on emery disc, improve aerodynamic profile when grinding is used, reaching the effect of obvious reduction grinding noise.CN101235261A has proposed a kind of preparation method of aerodux, and the vulcan fibre emery disc that uses this phenol aldehyde adhesive to make has significantly improved adhesive property, shear strength and moisture resistance energy.CN201179618Y is bonding layer of glass grid cloth on the vulcan fibre base material, has improved the mechanical strength and the adhesive strength of goods; Improve the distortion that is subjected to temperature and humidity to influence generation simultaneously, improved service life.CN201276524Y has proposed a kind of resin laminate abrasive sheet, mainly is by fabricbase being sticked on the epoxy resin fiberglass laminate with 5 layers, improving performances such as distortion, mechanical strength, impact strength, antistatic with this.CN201376239Y proposes a kind of anti-deformation chuck, can conveniently be used for fixing coated abrasive tool products such as vulcan fibre emery disc, has realized use a slice taking-up a slice, has prevented the distortion of vulcan fibre emery disc in storing process effectively.
Though below the problem that from different perspectives the vulcan fibre emery disc is existed has proposed concrete solution, the use of vulcan fibre emery disc is a comprehensive problem, still needs to continue to improve.
Summary of the invention
Technical problem to be solved by this invention is: the shortcoming at above prior art exists, high-effect elastic composite abrasive sheet and preparation method thereof is proposed, and can effectively prevent distortion, tensile strength is big, and adhesive property is good, and grinding performance is strong.
The technical scheme that the present invention solves above technical problem is:
A kind of high-effect elastic composite abrasive sheet comprises vulcan fibre back of the body base, primer, abrasive material and multiple glue;
Primer comprises following component by weight percentage:
Phenol-formaldehyde A 25-40%
Bakelite B 15-40%
Filler 30-58%
Surfactant 0.1-1.5%
Diluent 0.1-15%;
Phenol-formaldehyde A is the lower first rank water soluble phenol resin of free phenol content, and its index is as follows: solid content 72-75%, and viscosity 800-1500cps/25 ℃, pH is 7.5-8.5/25 ℃, gel time 7-10min/130 ℃, free phenol content 3-5%; Bakelite B is the higher first rank water soluble phenol resin of free phenol content, and its index is as follows: solid content 72-75%, and viscosity 800-1500cps/25 ℃, pH is 7.5-8.5/25 ℃, gel time 7-10min/130 ℃, free phenol content>8%; Filler is at least a in coarse whiting, fine particle calcium carbonate, chalky soil, diatomite or the wollastonite powder; Surfactant is at least a in aliphatic sulfonic thing, alkyl aryl sulphonic acid thing, alkyl naphthalene sulfonic acid thing, Span or the polyoxyethylene sorbitan fatty acid ester; Diluent is at least a in methyl alcohol, ethanol, acetone, ethyl acetate, ethylene glycol monoethyl ether, diethylene glycol ether or the water;
Multiple glue comprises following component by weight percentage:
Bakelite C, 15-70%
Phenolic resins D, 15-70%
Efficient levelling agent, 0.1-3%
Filler, 5-60%
Coupling agent, 0.1-1.0%
Pigment, 1-5%
Diluent 0.1-10%;
Bakelite C is low viscous first rank water soluble phenol resins, and its index is as follows: solid content 72-75%, and viscosity 400-800cps/25 ℃, pH is 7.5-8.5/25 ℃, gel time 8-12min/130 ℃; Phenolic resins D is full-bodied first rank water soluble phenol resins, and its index is as follows: solid content 72-75%, and viscosity 1500-3000cps/25 ℃, pH is 7.5-8.5/25 ℃, gel time 8-10min/130 ℃; Efficient levelling agent is at least a in organic silicon modified by polyether, alkyl-modified organosilicon, fluorin modified crylic acid ester polymer, alkyl diphenyl base oxide disulfonate, Span or the polyoxyethylene sorbitan fatty acid ester; Filler is at least a in calcium carbonate, silicate, hexafluoro sodium aluminate, potassium fluoborate, sodium fluoborate, calcirm-fluoride, sodium fluoride, calcium stearate or the zinc stearate; Coupling agent is at least a in silane coupler or the zirconium class coupling agent; Pigment is at least a in iron oxide red, iron oxide yellow, iron oxide black, iron oxide brown, phthalocyanine blue or the phthalocyanine green; Diluent is at least a in methyl alcohol, ethanol, acetone, ethyl acetate, ethylene glycol monoethyl ether, diethylene glycol ether or the water.
The preparation method of high-effect elastic composite abrasive sheet comprises the upper base glue process, plants the sand operation, upward glue process, back curing process, flexure band water conservancy project preface, laser cutting operation, the anti-deformation process operation of vulcan fibre and storage operation again; Adopt sand towards curling, adopting sand to make the sand face keep smooth again after the flexure band water conservancy project preface in the back curing process outward towards the interior mode that combines of curling, like this can the release of rational and effective control internal stress, reduce product deformation.
The technical scheme that the present invention further limits is:
Increase anti-blocking performance, product of the present invention can also contain the anti-clogging coating, and this coating can be embodied in the multiple glue, also can apply one deck again outside multiple glue; Mainly contain compositions such as stearate, fluoride in the described anti-clogging coating, as stearic acid, zinc stearate, calcium stearate, hexafluoro sodium aluminate, potassium fluoborate, sodium fluoborate, calcirm-fluoride, sodium fluoride etc.;
Abrasive material is one or more in aluminium oxide, the calcining of middle temperature, high-temperature calcination aluminium oxide, carborundum, fused alumina zirconia, fused alumina zirconia or the microcrystalline alumina.
It is 0.6mm, 0.8mm or 1.0mm that vulcan fibre is carried on the back basic thickness.Wherein the performance indications of 0.8mm vulcan fibre back of the body base are: tensile strength:>90MPa (MD),>45MPa (CD); Percentage elongation:<15% (MD),<25% (CD); Percent thermal shrinkage (105 ℃/5h):<2% (MD),<3% (CD),<6% (ZD); Density>1.25g/cm3; Rupture strength>2000kPa (23 ± 1 ℃, 50 ± 2%RH).
Adopt anti-deformation resin that vulcan fibre back of the body base is sprayed or coating processing, this operation can be carried out after laser cutting, also can finish before printing.Described anti-deformation resin is solvent type polyurethane resin, waterborne polyurethane resin, epoxy resin, phenolic resins, amino resins or acrylic resin.
In the flexure band water conservancy project preface, only carry out 90 ° of unidirectional flexures, water amount≤20g/m
2Use fixedly vulcan fibre emery disc of chuck, and store after using the waterproof plastic film to cover.
Advantage of the present invention is: can effectively prevent distortion in the manufacturing, the product tensile strength is big, and adhesive property is good, and grinding performance is strong.
The specific embodiment
Embodiment one
Employing 0.8mm vulcan fibre (23 ± 1 ℃, 50 ± 2%RH): tensile strength:>90MPa (MD),>45MPa (CD); Percentage elongation:<15% (MD),<25% (CD); Percent thermal shrinkage (105 ℃/5h):<2% (MD),<3% (CD),<6% (ZD); Density>1.25g/cm3; Rupture strength>2000kPa; Adopt 100# one-level palm fibre corundum, carry out electrostatic sand-planting; The part by weight prescription of its primer, multiple glue is as follows:
The part by weight prescription of the multiple glue in table 1 end
The preparation method of high-effect elastic composite abrasive sheet comprises the upper base glue process, plants the sand operation, upward glue process, back curing process, flexure band water conservancy project preface, laser cutting operation and storage operation again; Adopt sand to curl in the back curing process, adopt sand after the flexure band water conservancy project preface again towards interior curling towards outer.
It is as follows to plant behind the sand curing process of primer: 60 ℃/10min+75 ℃/20min+90 ℃/20min; The curing process of multiple glue is as follows: 65 ℃/10min+75 ℃/30min+85 ℃/30min+90 ℃/20min+100 ℃/10min; Carry out later stage curing 118 ℃/6 hours then, carry out 90 ° of unidirectional flexures after the cooling, band water 9g/m
2, carry out laser cutting after parking 24h, the packing storage.
Embodiment two
Employing 0.8mm vulcan fibre (23 ± 1 ℃, 50 ± 2%RH): tensile strength:>90MPa (MD),>45MPa (CD); Percentage elongation:<15% (MD),<25% (CD); Percent thermal shrinkage (105 ℃/5h):<2% (MD),<3% (CD),<6% (ZD); Density>1.25g/cm3; Rupture strength>2000kPa; Adopt 100# one-level high-temperature calcination aluminium oxide, carry out electrostatic sand-planting; The part by weight prescription of its primer, multiple glue is as follows:
The part by weight prescription of the multiple glue in table 2 end
The preparation method of high-effect elastic composite abrasive sheet comprises the upper base glue process, plants the sand operation, upward glue process, back curing process, flexure band water conservancy project preface, laser cutting operation, the anti-deformation process operation of vulcan fibre and storage operation again; Adopt sand to curl in the back curing process, adopt sand after the flexure band water conservancy project preface again towards interior curling towards outer.
It is as follows to plant behind the sand curing process of primer: 60 ℃/10min+75 ℃/20min+90 ℃/20min; The curing process of multiple glue is as follows: 65 ℃/10min+75 ℃/30min+85 ℃/30min+90 ℃/20min+100 ℃/10min; Carry out later stage curing 118 ℃/6 hours then, carry out 90 ° of unidirectional flexures after the cooling, band water 9g/m
2, carry out laser cutting after parking 24h; Use the waterproof polyurethane resin to carry out the spraying of vulcan fibre back of the body base, the amount of being coated with 15g/m
2Back, dry back uses the anti-deformation chuck to fix the vulcan fibre emery disc, and uses the waterproof plastic film to cover the back storage.
Embodiment detects:
The mensuration of crimpness: the vulcan fibre emery disc is nature in (20 ± 2) ℃, places 12h under (65 ± 5) %RH condition, concave surface is downward, lies on the flat board, measures the sunken value of maximum empty between dull and stereotyped and vulcan fibre emery disc with chi.
The mensuration of revolving strength: adopt the high speed rotary testing machine, revolution inspection speed is 112m/s, returns back to the constant 30s of desired speed and does not break.
Testing result:
The contrast of table 3 embodiment testing result
Numbering |
Crimpness, mm |
Revolving strength |
Embodiment one |
10 |
Do not break |
Embodiment two |
5 |
Do not break |
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.