CN107363739A - A kind of touch-screen essence throws the manufacture craft of piece - Google Patents
A kind of touch-screen essence throws the manufacture craft of piece Download PDFInfo
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- CN107363739A CN107363739A CN201710784051.1A CN201710784051A CN107363739A CN 107363739 A CN107363739 A CN 107363739A CN 201710784051 A CN201710784051 A CN 201710784051A CN 107363739 A CN107363739 A CN 107363739A
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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
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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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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A kind of touch-screen essence throws the manufacture craft of piece, comprises the following steps：A：Slurry preparation；Described slurry is using common wet type polyurethane resin, DMF, abrasive particle CeO2, inflatable Expancel microballoons, NaCl（Or Fe2(SO4)3）Powder, bleeding agent and foaming agent are formulated, B:Impregnating slurry non-woven fabrics；C:Solidification of the slurry in non-woven fabrics and compound；D:Essence is thrown piece and dried；The blank essence that step C is obtained is thrown into piece and toasts 0.5h under 160 170 DEG C of environment；E:Essence throws piece polishing;F:Essence throws open channels on piece；Piece surface, which is thrown, in the essence that step E is obtained opens up groove.The touch-screen essence that the present invention obtains throws the soft or hard appropriateness of piece, and wearability is strong, and tensile strength is big, and ductility is good, and elasticity is strong, and grinding efficiency is high.
Description
Technical field
The present invention relates to the production technology that a kind of touch-screen essence throws piece, belong to field of functional materials.
Background technology
Finish, flatness, the transparency and the sensitivity of touch-screen and the performance of touch-screen are closely related.Touch-screen into
In shape flow, wherein one of important procedure is exactly to polish, the polishing material of generally use is rare earth polishing, after throwing, is touched
Touch screen surfaces and always more or less leave burr, it is necessary to which second polishing, material therefor professional are referred to as " touch-screen essence throwing
Piece ".Patent CN103254404A and CN101381449A disclose a kind of technology for producing polyurethane resin for artificial leather, are used for
Touch-screen essence throws the making of piece.Patent CN102672628A discloses a kind of production technology for making polyurethane polishing pad, and this is special
Profit primarily focuses on the making for illustrating polyurethane elastomer, and the manufacture craft and using effect description to polishing pad are related to very few.
The content of the invention
It is an object of the invention to provide the manufacture craft that a kind of touch-screen essence throws piece.
To realize the purpose of the present invention, following technical schemes is employed：A kind of touch-screen essence throws the manufacture craft of piece, bag
Include following steps：
A：Slurry preparation；Described slurry is using common wet type polyurethane resin, DMF, abrasive particle CeO2, inflatable Expancel it is micro-
Ball, NaCl or Fe2(SO4)3Powder, bleeding agent and foaming agent are formulated, wherein the mass ratio 1 of polyurethane resin and DMF:
1.2—1:2.5；Abrasive particle CeO2Powder diameter adds the 15-25% that quality is polyurethane resin quality at 0.37-3.6 μm；Can be swollen
The addition quality of swollen microballoon and foaming agent is the 1-3% of polyurethane resin quality, and foaming agent is polysiloxane group non-ionic surface
Activating agent, bleeding agent are C-70 or C-90 anion surfactants, add the 0.5-2.6% that quality is DMF mass；NaCl
Or Fe2(SO4)3Powder addition is the 0.5-2% of polyurethane resin quality, and particle diameter is at 0.37-3.6 μm, with abrasive particles particle diameter
It is similar.The preparing process of slurry is：First add DMF in agitator tank, stir 0.5h, add common wet type polyurethane resin,
Abrasive particle CeO2Powder, inflatable Expancel microballoons, NaCl or Fe2(SO4)3Powder, bleeding agent and foaming agent, continue to stir 2h,
Polyurethane resin is fully merged with DMF, be made into slurry；
B:Impregnating slurry non-woven fabrics；Using dried non-woven fabrics, the thickness 3-4mm of non-woven fabrics, the pulling force that can be born is not less than
1520N, modulus of elasticity 12-16N/mm2, maximum elongation rate 64-82%；The slurry prepared is squeezed into dipping tank with air pump, by nothing
Spin cloth to release from storage cloth holder through its moisture of ironing roller heating removing, place into dipping tank, non-woven fabrics uses following two modes
One of make impregnating slurry non-woven fabrics, first, non-woven fabrics to be impregnated to 6-10min in the slurry, then extruded with pressure roller, platen pressure is set
It is set to 4.4-4.6kg/cm2, extrude 2-3 times repeatedly, non-woven fabrics is fully infiltrated slurry；Non-woven fabrics is filled in second, slurry is poured
On, below non-woven fabrics pumping form vacuum, slurry is under air pressure effect, from top to bottom immersion non-woven fabrics；
C:Solidification of the slurry in non-woven fabrics and compound；Technique is：The non-woven fabrics of slurry will be impregnated with the clear water containing DFM
36-40min is soaked in mixed liquor, the mol ratio of DMF and clear water is 1 in the mixed liquor of DFM clear water:3, in non-woven fabrics dipping
DMF in slurry between clear water to constantly realizing solidification and compound, solidification of the polyurethane resin in non-woven fabrics during diffusion
Pond temperature is 12-16 DEG C；Then piece is thrown to blank essence and crosses roll shaft extruding, additional size, DMF and hardening particle are squeezed out,
Then it is rinsed and extruded successively in multiple clear water reserviors, blank essence is thrown organic solvent DMF in piece and be substantially dissolved in clear water
Chi Zhong, untill DMF mass contents are less than 1% in the clear water reserviors to the last passed through；
D:Essence is thrown piece and dried；The blank essence that step C is obtained is thrown into piece and toasts 0.5h under 160-170 DEG C of environment；
E:Essence throws piece polishing;The dried blank essences of step D are thrown into piece and utilize wide-belt sander, piece is thrown to blank essence and beaten
Mill, the essence required for obtaining throw piece thickness, and when throwing piece using sander polishing essence, charging rate is advisable with 18-20m/min, essence
Throw 15.43-18.94 μm of piece roughness；
F:Essence throws open channels on piece；Piece surface is thrown in the essence that step E is obtained and opens up groove, and groove is for multiple concentric rings and by same
Multiple radial grooves of heart circle, gash depth 0.3-0.4mm, concentric ring channel radii spacing 4-6mm, pass through the multiple of concentric circles
Angle between radial groove is 30o, trench section is in "U" shaped or " V " font, width of rebate 0.5-0.6mm；
Further, common wet type polyurethane resin uses 6021 types in step A, and molecular weight is taken as 500-1200, and solid content is
30%, isocyanates accounts for the 45-50% of polyurethane resin gross mass in common wet type polyurethane resin；Oligomer polyol accounts for 25-
30%；Chain extender accounts for 10-15%, and segment terminator accounts for 0.6%, and chain extender molecular weight is below 200；Further, sent out in step A
Infusion is silicone glycol.
The present invention impregnates common wet type XCW-6021 Polyurethane resin slurries production touch-screen essence using non-woven fabrics and throws piece, touches
Touch screen essence throwing piece and be equally applicable for the precise polished of the glass materials such as optical lens, prism, add in the slurry in polyurethane resin
Add CeO2Deng abrasive particle, the polishing of glass material is may be directly applied to, without second polishing.The touch-screen essence that the present invention obtains is thrown
Piece wearability is high, free from environmental pollution during grinding, harmless to human body, is polished workpiece and easily cleans, be surface-brightening, attractive in appearance, no
There is cut and burr, there is wide market application value, the touch-screen essence of institute's output of the present invention throws piece thickness can basis
User needs to be adjusted.Touch-screen essence throws the soft or hard appropriateness of piece, and wearability is strong, and tensile strength is big, and ductility is good, and elasticity is strong, grinds
Grind efficiency high.
Brief description of the drawings
Fig. 1 is the schematic diagram that essence throws the groove opened up on piece.
Embodiment
Essence prepared by the present invention throws piece material therefor：Polyester non-woven fabric, common wet type polyurethane resin, N, N- dimethyl methyls
Acid amides（DMF）, abrasive particle CeO2, expandable microspheres, NaCl or Fe2(SO4)3Powder, bleeding agent and foaming agent.Polyester non-woven fabric is in essence
Throw and play a part of to support polyurethane resin and abrasive particle in piece, common wet type polyurethane resin is using rising sun river chemistry（Suzhou）Limited public affairs
The XCW-6021 types of production are taken charge of, molecular weight is taken as 500-1200, solid content 30%, and performance bullet-modeling is moderate.If polyurethane tree
Fat molecular weight is thrown piece less than 500, by the essence of polyurethane resin manufacture and easily gone out without sufficiently elasticity, the glass pieces being polished
Existing cut；If polyurethane resin molecular weight, more than 1200, essence throwing piece is excessively soft, influences the clearance of glass material, reduces essence
The planarization capability of piece is thrown, in common wet type polyurethane resin, isocyanates accounts for the 45-50% of polyurethane resin gross mass；It is low
Polymers polyalcohol accounts for 25-30%；Chain extender（Such as ethylene glycol）Account for 10-15%, segment terminator（Such as methanol）0.6% is accounted for, is also had
Other auxiliary materials, such as crosslinking agent, catalyst, antioxidant etc..Chain extender molecular weight is below 200.If chain extender（Such as 3- is chloro-
2,6- diethylanilines）Dosage is excessive, average functional group's degree increase of system, the molecular weight increase of polyurethane resin, polyurethane
Prepolymer gradually develops into build cross-linked structure by linear molecular structure, and interchain is tightly combined, and crosslinking points increase, and cross-linked network becomes
Short, segment stretching, extension is restricted, and flexibility reduces, rigidity reinforced.
The preparation technique technique of slurry of the present invention is：DMF is first added in agitator tank, stirs 0.5h, is added common wet
Type polyurethane resin, abrasive particle CeO2Powder, expandable microspheres, NaCl or Fe2(SO4)3Powder, bleeding agent and foaming agent, continue to stir
2h, polyurethane resin is fully merged with DMF, be made into slurry.Due to being exothermic reaction, it is not necessary to extra heating.At this moment slurry
Temperature is in 25-30；The mol ratio 0.4 of common wet type XCW-6021 polyurethane resins and DMF:0.6；Abrasive particle CeO2Powder diameter exists
0.37-3.6 μm, addition is the 16-18% of polyurethane resin quality；The addition of expended microsphere and foaming agent is polyurethane
The 1-3% of resin quality；Inflatable Expancel microballoons, there is depression on surface, and during slurry agitation, diameter can be by 12 μm
Increase to 40 μm；Foaming agent is polysiloxane group nonionic surface active agent, and the purpose for adding foaming agent is made in polyurethane
Resin surface produces bubble, increases the elasticity that essence throws piece.If addition is less than 0.1%, it is difficult to produces bubble；If addition is more than
10%, bubble produces too much, increases slurry viscosity, and non-woven fabrics infiltration slurry is difficult, and essence throws the reduction of piece hardness, polishing efficiency drop
It is low；Polysiloxane group nonionic surface active agent can be copolymer, such as silicone glycol, containing hydroxyl, have and dredge
It is water-based, it is a kind of good seminal vesicle agent compatible with the compound containing isocyanates and active hydride；Silicone glycol proportion
Viscosity 465mm at 1.07,20 DEG C2/s；Bleeding agent is C-70 or C-90, belongs to anion surfactant, has hydrophily,
It is main to act the exchange velocity for accelerating DMF and water, improve production efficiency.It is general to add the 0.5-2.6% that quality is DMF mass.If plus
It is excessive to enter amount, essence throws the easy outstanding figure of piece.NaCl or Fe2(SO4)3Powder is soluble in water, and NaCl is added in touch-screen essence throws piece slurry
Or Fe2(SO4)3Powder, water is dissolved in step C slurry curings and compound tense, increase touch-screen essence throws the porosity and elasticity of piece.
Non-woven fabrics needs drying, thickness 3-4mm, and the pulling force that can be born is not less than 1520N, modulus of elasticity 12-16N/mm2, most
Big elongation 64-82%；The technical matters of non-woven fabrics dipping sizing agent is：The slurry prepared is squeezed into dipping tank with air pump, will
Non-woven fabrics is put into dipping tank from storage cloth holder.Before dipping tank is entered, non-woven fabrics need to heat through ironing roller and remove its moisture, otherwise smart
Throw piece and be also easy to produce two layers of skin phenomenon.Non-woven fabrics dipping sizing agent can take the one of which in two kinds of methods：First, by non-woven fabrics
6-10min is impregnated in the slurry, then is extruded with pressure roller, and platen pressure is set as 4.4-4.6kg/cm2, 2-3 is so repeated
It is secondary, non-woven fabrics is fully infiltrated slurry；Second, slurry is poured on non-woven fabrics, it is evacuated below non-woven fabrics and forms vacuum, slurry
Under air pressure effect, from top to bottom immersion non-woven fabrics；During non-woven fabrics dipping sizing agent, compared with impregnating naturally, squeeze
Pressure 2-3 times, non-woven fabrics absorb 36% slurry more；Vacuum is formed using pumping, non-woven fabrics absorbs 10% slurry more.
Slurry solidifies in non-woven fabrics and compound technical matters is：The non-woven fabrics for being impregnated with slurry there is into DFM：Clear water
=1:3（Mol ratio）36-40min is soaked in mixed liquor, because DMF property miscible with water is good, and polyurethane resin and water not phase
Hold, solidification of the polyurethane resin in non-woven fabrics and compound is realized during DMF and water constantly spread.Due to by gravity and
The influence of foaming agent, it may appear that slurry infiltration non-woven fabrics inequality, density unevenness, uneven thickness, surface irregularity, have prominent hard
The defects of changing particle.Must through framing shaping machine roller bearing extrude, by unnecessary slurry, DMF and hardening particle squeeze out.This
When touch-screen essence throw piece just one-step forming, solidifying pool temperature is higher, such as at 36 DEG C, although polyurethane resin solidified in non-woven fabrics need
The time wanted is short, but quickly cohesion cause blank essence throw the quick skinning in piece surface, and non-woven fabrics inside DMF in water can not and
When cement out；Solidifying pool temperature is lower, such as 8oDuring C, blank essence throws piece surface skining phenomenon unobvious, can make inner pulp
Material DMF be substantially soluble in water, polyurethane resin obtained in non-woven fabrics fully solidification and it is compound, but solidify and recombination velocity compared with
Slowly.Solidifying pool temperature is advisable with 12-16 DEG C；It is substantially dissolved in order to which blank essence is thrown into DFM in piece in clear water, blank essence is thrown into piece
Continuously soak and extrude in multiple clear water reserviors, pressure roller is set as 3.6-4.6kg/cm2, to the last a clear water reserviors DMF contain
Untill amount is less than 1%.Contents of the DMF in clear water reserviors can utilize PX-B80A saccharometers to test.
The essence of the present invention throws piece blank drying process：The essence that step C is obtained is thrown piece and toasted under 160-170 DEG C of environment
0.5h, baking time is longer, and essence throws the hardness of piece, modulus of elasticity also increases, but energy resource consumption is big, and essence throws piece jaundice.
Essence throws the technique for grinding of piece：In order that essence throws piece surface roughness and thickness is homogeneous and moderate, broadband sanding is utilized
Machine is thrown piece to blank essence and polished, and the essence required for obtaining throws piece thickness, such as 2-4mm.Piece is thrown using sander polishing essence
When, charging rate is advisable with 18-20m/min, and essence throws 15.43-18.94 μm of piece roughness.
Essence throws piece surface and opens up groove：Essence throwing piece in mechanical polishing process there is storage, transport polishing fluid, excretion to add
Stevedore's damage slag, transmit mechanical load and maintain the functions such as polishing environment.Essence throw piece surface groove, be advantageous to grinding and polishing residue,
Accessory substance cuts the discharge of heat with rubbing, and is to improve the uniformity and polishing efficiency that are polished workpiece, reduces grinding scuffing probability, extends
One of method that essence throws piece service life.Groove structure is as shown in Figure 1：Groove is multiple concentric rings and passes through the multiple of concentric circles
Radial groove, gash depth 0.3-0.4mm, concentric ring channel radii spacing 4-6mm, by multiple radial grooves of concentric circles it
Between angle be 30o, trench section is in "U" shaped or " V " font, width of rebate 0.5-0.6mm, when essence throws piece rotation, is thrown
Light liquid is with groove circumferential flow, scatter-gather.
In present example, the measure of hardness uses LX-A type Shore A durometers, is thrown in essence at piece diverse location,
Its average value is taken after 6 point tests of selection.Essence throws the test of piece abrasivity and uses JM-V type abrasion instruments, pressure 750g, and essence is thrown
During slice lapping glass material, rotation 300 is enclosed, and calculates front and rear of poor quality, the quality that as essence throwing piece is worn away of its rotation.Clear water
DMF contents are tested with saccharometer PX-B80A in pond.
When essence throws piece surface roughness increase, during grinding and workpiece（Glass）Frictional force between surface substantially increases, material
Material clearance also increases.When essence, which throws piece surface roughness, increases to certain value, such as Ra7.0 μm, workpiece（Glass）Thrown with essence
Frictional force between piece tends towards stability, and workpiece surface quality will not also be further added by slightly decreasing trend on the contrary.The porosity is weighing apparatus
Amount essence throws an important indicator of piece performance.In the case where porosity is suitable, such as 69%, stomata can play heat absorption, radiating and
Reduce the effect of vibration.The porosity is too low, has a large amount of frictional heats to spread in time during grinding, essence is thrown piece steep temperature rise, its
Service life and polishing effect are also deteriorated quickly.The porosity is too high, and stomata can absorb a large amount of cooling waters, causes essence to throw sheet matrix molten
Swollen softening, mechanical performance decline, and service life shortens, and polishing effect is also deteriorated.
Embodiment one：
63 parts of DMF of mass ratio is stirred into 0.5h, then adds the XCW-6021 polyurethane resins that mass number is 37 parts, 1 part swollen
Swollen microballoon, 1 part of foaming agent silicone glycol, 8 parts of CeO2Powder, 0.3 part of NaCl powder, 0.5 part of bleeding agent C-90, stirring
2h, rotating speed 200rpm, form mixed slurry.Thick 4mm drying non-woven fabrics is fully soaked into 6min in mixed slurry afterwards, used
Pressure roller extrudes, pressure 4.4kg/cm2, so it is repeated 2-3 times, non-woven fabrics is fully infiltrated slurry.Then slurry will be impregnated with
The non-woven fabrics of material is 1 in solidifying pool solidification and compound 36min, solidifying pool mixed liquor DMF and deionized water mol ratio：3, solidifying pool
Temperature is set as 16 DEG C.Piece is thrown to blank essence afterwards and crosses roll shaft extruding, additional size, DMF and hardening particle are squeezed out.Connect
And it is rinsed and extruded in multiple clear water reserviors, organic solvent DMF and NaCl is substantially dissolved in clear water reserviors, to the last
Untill one clear water reserviors DMF content is less than 1%, at this moment NaCl powder is also substantially dissolved in clear water reserviors.With without using bleeding agent C-
90 compare, and blank essence throws piece and reduces 20% in the soak time of clear water reserviors.It is then dried to 0.5h, dryer in dryer
Temperature setting is 160 DEG C, essence throwing piece moisture and DMF is fully evaporated.Piece polishing is thrown to essence followed by sander, makes its surface
Roughness is homogeneous.Piece finally is thrown to essence and opens up groove.The essence of making throws piece：Shore hardness 73HA, tensile strength 28N/mm2, break
Split elongation 56%, 22.09 μm of surface roughness Ra, abrading glass, the circle of rotation 300, abrasion loss 0.098g.Polyurethane and nothing
It is compound close to spin measuring fiber, surface micropore size 0.1-0.2mm, the porosity 56%, water penetration is good.
Embodiment two:
The DMF that mass ratio is 62 parts is stirred into 0.6h, then 38 parts of XCW-6021 polyurethane resins of addition, 1 part of expandable microspheres,
0.8 part of foaming agent silicone glycol, 9 parts of CeO2Powder, 0.5 part of NaCl powder, 0.6 part of bleeding agent C-70,2.2h is stirred, turned
Fast 200rpm, form mixed slurry.Afterwards by thick 3mm drying non-woven fabrics in mixed slurry fully immersion 6min, then with bear
Pressure filters, and non-woven fabrics is fully infiltrated slurry.Then the non-woven fabrics for being impregnated with slurry is solidified and compound in solidifying pool
42min, solidifying pool mixed liquor DMF are 1 with deionized water mol ratio：3, solidifying pool temperature is set as 18 DEG C.Piece is thrown to essence afterwards
Roll shaft extruding is crossed, additional size, DMF and hardening particle are squeezed out.Then it is rinsed and extruded in multiple clear water reserviors,
Organic solvent DMF and NaCl powder is set to be substantially dissolved in clear water reserviors, to the last a clear water reserviors DMF content is less than 0.8%
Only.Compared with without using bleeding agent C-70, essence throws piece and reduces 26% in the soak time of clear water reserviors.Then by it in dryer
0.6h is dried, dryer temperature setting is 161 DEG C, essence throwing piece moisture and DMF is fully evaporated.Essence is thrown followed by sander
Piece is polished, and makes its surface roughness homogeneous.Piece finally is thrown to essence and opens up groove.The essence of making throws piece：Shore hardness 71HA, tension
Intensity 29N/mm2, elongation at break 60%, 15.43 μm of surface roughness Ra, abrading glass, rotate 300 and enclose, abrasion loss is
0.066g.Polyurethane is compound close with non-woven fabrics fiber, surface micropore size 0.1-0.3mm, and water penetration is good.Porosity 66%,
Essence throwing piece pore size is bigger, and it is transported, and the ability of polishing fluid is stronger, but too conference influences density and rigidity that essence throws piece, micro-
The density in hole（Porosity）Polishing effect is had a significant impact.
Embodiment three:
The DMF that mass ratio is 68 parts is stirred into 0.7h, then adds 32 parts of XCW-6021 polyurethane resins, 0.78 part of expansion is micro-
Ball, 0.6 part of foaming agent silicone glycol, 7 parts of CeO2Powder, 0.5 part of Fe2(SO4)3, 0.7 part of bleeding agent C-90, stirring
2.2h, rotating speed 200rpm, form mixed slurry.Thick 3mm drying non-woven fabrics is fully soaked into 6min in mixed slurry afterwards,
With negative pressure leaching, non-woven fabrics is set fully to infiltrate slurry.Then the non-woven fabrics for being impregnated with slurry is solidified and compound in solidifying pool
42min, solidifying pool mixed liquor DMF are 1 with deionized water mol ratio：3, solidifying pool temperature is set as 18 DEG C.Piece is thrown to essence afterwards
Roll shaft extruding is crossed, additional size, DMF and hardening particle are squeezed out.Then it is rinsed and extruded in multiple clear water reserviors,
Make organic solvent DMF, NaCl and Fe2(SO4)3It is substantially dissolved in clear water reserviors, to the last a clear water reserviors DMF content is less than
Untill 0.8%.Compared with without using bleeding agent, essence throws piece and reduces 32% in the soak time of clear water reserviors.Then by it in dryer
Middle drying 0.5h, dryer temperature setting are 160 DEG C, blank essence throwing piece moisture and DMF is fully evaporated.Followed by sander
Piece polishing is thrown to essence, makes its surface roughness homogeneous.Piece finally is thrown to essence and opens up groove.The essence of making throws piece：Shore hardness
73HA, tensile strength 20N/mm2, elongation at break 56%, 16.49 μm of surface roughness Ra, abrading glass, the circle of rotation 300, mill
Consumption 0.059g.Polyurethane is compound close with non-woven fabrics fiber, surface micropore size 0.2-0.5mm, and micropore is in closing or opens wide
Two states, porosity 68%, water penetration is good.Negative pressure leaching, polyurethane resin dosage is few, and it is low that essence throws piece grammes per square metre.
] example IV：
The DMF that mass ratio is 60 parts is stirred into 0.6h, then adds 40 parts of XCW-6021 polyurethane resins, 0.9 part of foaming agent gathers
Siloxane glycol, 9 parts of CeO2Powder, 0.4 part of Fe2(SO4)3, 0.8 part of bleeding agent C-70,2.0h, rotating speed 200rpm are stirred, are formed
Mixed slurry.Afterwards by thick 3mm drying non-woven fabrics in mixed slurry fully immersion 6min, then with negative pressure leaching, make nonwoven
Cloth fully infiltrates slurry.Then the non-woven fabrics for being impregnated with slurry is solidified and compound 42min, solidifying pool mixed liquor in solidifying pool
DMF is 1 with deionized water mol ratio：3, solidifying pool temperature is set as 18 DEG C.Piece is thrown to essence afterwards and crosses roll shaft extruding, by more remaining slurries
Material, DMF and hardening particle squeeze out.Then it is rinsed and extruded in multiple clear water reserviors, make organic solvent DMF, NaCl
And Fe2(SO4)3It is substantially dissolved in clear water reserviors, untill to the last a clear water reserviors DMF content is less than 0.8%.With without using oozing
Saturating agent is compared, and essence throws piece and reduces 32% in the soak time of clear water reserviors.It is then dried to 0.5h, dryer temperature in dryer
Degree is arranged to 160 DEG C, essence throwing piece moisture and DMF is fully evaporated.Piece polishing is thrown to essence followed by sander, makes its surface thick
Rugosity is homogeneous.Piece finally is thrown to essence and opens up groove.The essence of making throws piece：Shore hardness 76HA, tensile strength 32N/mm2, fracture
Elongation 53%, 16.96 μm of surface roughness Ra, abrading glass, the circle of rotation 300, abrasion loss 0.076g.Polyurethane and nonwoven
Measuring fiber is compound close, surface micropore size 0.1-0.2mm, porosity 42%.Bleeding agent addition exceedes the 6% of DMF, and essence is thrown
The easy outstanding figure of piece.
Embodiment five：
The DMF that mass ratio is 58 parts is stirred into 0.6h, then 42 parts of XCW-6021 polyurethane resins of addition, 1.1 parts of expandable microspheres,
0.75 part of foaming agent silicone glycol, 9.5 parts of CeO2Powder, 0.5 part of Fe2(SO4)3Powder, 0.6 part of bleeding agent C-70, stirring
2.2h, rotating speed 200rpm, form mixed slurry.Thick 3mm drying non-woven fabrics is fully soaked into 6min in mixed slurry afterwards,
With negative pressure leaching, non-woven fabrics is set fully to infiltrate slurry.Then the non-woven fabrics for being impregnated with slurry is solidified and compound in solidifying pool
42min, solidifying pool mixed liquor DMF are 1 with deionized water mol ratio：3, solidifying pool temperature is set as 18 DEG C.Piece is thrown to essence afterwards
Roll shaft extruding is crossed, additional size, DMF and hardening particle are squeezed out.Then it is rinsed and extruded in multiple clear water reserviors,
Make organic solvent DMF and Fe2(SO4)3Powder is substantially dissolved in clear water reserviors, and to the last a clear water reserviors DMF content is less than
Untill 0.8%.Compared with without using bleeding agent, essence throws piece and reduces 30% in the soak time of clear water reserviors.Then by it in dryer
Middle drying 0.5h, dryer temperature setting are 160 DEG C, essence throwing piece moisture and DMF is fully evaporated.Followed by sander to essence
Piece polishing is thrown, makes its surface roughness homogeneous.Piece finally is thrown to essence and opens up groove.The essence of making throws piece：Shore hardness 71HA, resist
Tensile strength 33N/mm2, elongation at break 60%, 16.29 μm of surface roughness Ra, abrading glass, rotate 300 and enclose, abrasion loss is
0.068g.Polyurethane is compound close with non-woven fabrics fiber, and surface micropore size 0.1-0.3mm, porosity 66%, water penetration is good
It is good.
Embodiment six：
The DMF that mass ratio is 62 parts is stirred into 0.6h, then 39 parts of XCW-6021 polyurethane resins of addition, 1 part of expandable microspheres,
0.8 part of foaming agent silicone glycol, 9 parts of CeO2Powder, 0.5 part of NaCl powder, 0.5 part of bleeding agent C-90,2.1h is stirred, turned
Fast 200rpm, form mixed slurry.Thick 4mm drying non-woven fabrics is fully soaked into 6min in mixed slurry afterwards, uses pressure roller
Extruding, pressure 4.4kg/cm2, so it is repeated 2-3 times, non-woven fabrics is fully infiltrated slurry.Then slurry will be impregnated with
It is 1 with deionized water mol ratio that non-woven fabrics, which solidifies in solidifying pool with compound 42min, solidifying pool mixed liquor DMF,：3, solidifying pool temperature
Degree is set as 16 DEG C.Piece is thrown to essence afterwards and crosses roll shaft extruding, additional size, DMF and hardening particle are squeezed out.Then by it
Rinse and extrude in multiple clear water reserviors, organic solvent DMF and NaCl is substantially dissolved in clear water reserviors, to the last one it is clear
Untill pond DMF contents are less than 0.8%.Compared with without using bleeding agent, essence throws piece and reduces 24% in the soak time of clear water reserviors.Connect
And it is dried to 0.5h in dryer, dryer temperature setting is 160 DEG C, essence throwing piece moisture and DMF is fully evaporated.Then
Piece polishing is thrown to essence using sander, makes its surface roughness homogeneous.Piece finally is thrown to essence and opens up groove.The essence of making throws piece：
Shore hardness 69HA, tensile strength 31N/mm2, elongation at break 62%, 22.09 μm of surface roughness Ra, abrading glass, rotation
300 circles, abrasion loss 0.072g.Polyurethane is compound close with non-woven fabrics fiber, surface micropore size 0.2-0.4mm, and porosity is
62%, water penetration is good.
Claims (3)
1. a kind of touch-screen essence throws the manufacture craft of piece, it is characterised in that：Comprise the following steps：
A：Slurry preparation；Described slurry is using common wet type polyurethane resin, DMF, abrasive particle CeO2, inflatable Expancel it is micro-
Ball, NaCl or Fe2(SO4)3Powder, bleeding agent and foaming agent are formulated, wherein the mass ratio 1 of polyurethane resin and DMF:
1.2—1:2.5；Abrasive particle CeO2Powder diameter adds the 15-25% that quality is polyurethane resin quality at 0.37-3.6 μm；Can be swollen
The addition quality of swollen microballoon and foaming agent is the 1-3% of polyurethane resin quality, and foaming agent is polysiloxane group non-ionic surface
Activating agent, bleeding agent are C-70 or C-90 anion surfactants, add the 0.5-2.6% that quality is DMF mass；NaCl
Or Fe2(SO4)3Powder addition is the 0.5-2% of polyurethane resin quality, and particle diameter is at 0.37-3.6 μm, with abrasive particles particle diameter
Similar, the preparing process of slurry is：First add DMF in agitator tank, stir 0.5h, add common wet type polyurethane resin,
Abrasive particle CeO2Powder, inflatable Expancel microballoons, NaCl（Or Fe2 (SO4) 3）, bleeding agent and foaming agent, continue to stir 2h,
Polyurethane resin is fully merged with DMF, be made into slurry；
B:Impregnating slurry non-woven fabrics；Using dried non-woven fabrics, the thickness 3-4mm of non-woven fabrics, the pulling force that can be born is not less than
1520N, modulus of elasticity 12-16N/mm2, maximum elongation rate 64-82%；The slurry prepared is squeezed into dipping tank with air pump, by nothing
Spin cloth to release from storage cloth holder through its moisture of ironing roller heating removing, place into dipping tank, non-woven fabrics uses following two modes
One of make impregnating slurry non-woven fabrics, first, non-woven fabrics to be impregnated to 6-10min in the slurry, then extruded with pressure roller, platen pressure is set
It is set to 4.4-4.6kg/cm2, extrude 2-3 times repeatedly, non-woven fabrics is fully infiltrated slurry；Non-woven fabrics is filled in second, slurry is poured
On, below non-woven fabrics pumping form vacuum, slurry is under air pressure effect, from top to bottom immersion non-woven fabrics；
C:Solidification of the slurry in non-woven fabrics and compound；Technique is：The non-woven fabrics of slurry will be impregnated with the clear water containing DFM
36-40min is soaked in mixed liquor, the mol ratio of DMF and clear water is 1 in the mixed liquor of DFM clear water:3, in non-woven fabrics dipping
DMF in slurry between clear water to constantly realizing solidification and compound, solidification of the polyurethane resin in non-woven fabrics during diffusion
Pond temperature is 12-16 DEG C；Then piece is thrown to blank essence and crosses roll shaft extruding, additional size, DMF and hardening particle are squeezed out,
Then it is rinsed and extruded successively in multiple clear water reserviors, blank essence is thrown organic solvent DMF in piece and be substantially dissolved in clear water
Chi Zhong, untill DMF mass contents are less than 1% in the clear water reserviors to the last passed through；
D:Essence is thrown piece and dried；The blank essence that step C is obtained is thrown into piece and toasts 0.5h under 160-170 DEG C of environment；
E:Essence throws piece polishing;The dried blank essences of step D are thrown into piece and utilize wide-belt sander, piece is thrown to blank essence and beaten
Mill, the essence required for obtaining throw piece thickness, and when throwing piece using sander polishing essence, charging rate is advisable with 18-20m/min, essence
Throw 15.43-18.94 μm of piece roughness；
F:Essence throws open channels on piece；Piece surface is thrown in the essence that step E is obtained and opens up groove, and groove is for multiple concentric rings and by same
Multiple radial grooves of heart circle, gash depth 0.3-0.4mm, concentric ring channel radii spacing 4-6mm, pass through the multiple of concentric circles
Angle between radial groove is 30o, trench section is in "U" shaped or " V " font, width of rebate 0.5-0.6mm.
2. a kind of touch-screen essence according to claim 1 throws the manufacture craft of piece, it is characterised in that：It is common wet in step A
Type polyurethane resin uses 6021 types, and molecular weight is taken as 500-1200, solid content 30%, different in common wet type polyurethane resin
Cyanate accounts for the 45-50% of polyurethane resin gross mass；Oligomer polyol accounts for 25-30%；Chain extender accounts for 10-15%, and segment terminates
Agent accounts for 0.6%, and chain extender molecular weight is below 200.
3. a kind of touch-screen essence according to claim 1 throws the manufacture craft of piece, it is characterised in that：Foaming agent in step A
For silicone glycol.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111941271A (en) * | 2020-09-02 | 2020-11-17 | 东莞金太阳研磨股份有限公司 | Glass polishing pad and preparation method thereof |
| CN116079581A (en) * | 2023-02-22 | 2023-05-09 | 东莞市鼎泰鑫电子有限公司 | Laminated foaming non-woven fabric grinding wheel and preparation method thereof |
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| CN116079581B (en) * | 2023-02-22 | 2024-03-22 | 东莞市鼎泰鑫电子有限公司 | Laminated foaming non-woven fabric grinding wheel and preparation method thereof |
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| CN107363739B (en) | 2018-11-13 |
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