CN105290988B - A kind of leather sand paper for curved-surface materials of polishing and preparation method thereof - Google Patents
A kind of leather sand paper for curved-surface materials of polishing and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of leather sand paper for curved-surface materials of polishing and preparation method thereof, the leather sand paper is the abrasive material from top to bottom set gradually, leather layer, spongy layer, waterproof layer and silk raising layer.The preparation method of the sand paper must grind leather composite bed including abrasive grains coating is uniformly coated on leather layer surface；The leather layer surface for grinding leather composite bed and spongy layer pipe sensitive adhesion are formed into grinding leather sponge composite bed again；Then by the waterproof level of film suede composite bed and the spongy surface pipe sensitive adhesion of grinding leather sponge composite bed.The preparation method of the leather sand paper of curved-surface materials provided by the invention of polishing is easy to operate, the leather sand paper of preparation it is high-quality, suitable for industrial mass production.The flexibility of leather sand paper height, the polishing cushion performance prepared using the method for the present invention is good, and the curved-surface materials polishing effect of leather sand paper is good, and the stability in use of leather sand paper is high.
Description
Technical field
The present invention relates to grinding-material fields, and in particular to a kind of leather sand paper of curved-surface materials of polishing and its preparation side
Method.
Background technology
Sand paper is commonly called as rubber, is a kind of for abradant material, for the surface of abrasive metal, timber etc., makes material table
Face is smooth.
Till now, shell is mostly using magnesium alloy, and shape need is higher and higher, such as the song of Samsung mobile phone for 3c electronics
Face, the edge radian of iPhone, ipad, be required for polishing sand paper have certain flexibility, larger grinding force, enough
Adhesion and hardness；And in sand paper bruting process, dry grinding environmental pollution is bigger, easily causes dust explosion, therefore sand paper
It also needs water-fast.
In existing sand paper, usually in body paper or the various abrasive grits of Plastic film surface adhesion, such as Publication No.
The Chinese patent literature of CN104416483A discloses a kind of moisture-proof sand paper, includes the base of a surface adhesion frosted particle,
Another surface of base is bonded a surface of a waterproof layer, and another surface of waterproof layer is bonded with wearing layer；The substrate surface
Middle part is provided with the lug boss protruded outward for frosted particle to be separated, and the frosted granular size of the lug boss both sides is not
Together.Since substrate surface is separated frosted particle, and frosted particle is of different sizes by lug boss, can realize in this way pair
The thick polishing and fine polishing of workpiece surface.
Authorization Notice No. is that the Chinese patent literature of CN103465181A discloses a kind of Sponge sand paper, including base material, glue
Viscous material and abrasive material composition, the base material are sponge kind, and the adhesive material is epoxy modified resin, using sponge kind base material,
So as to compared to traditional Sponge sand paper, have better flexibility, the equipment of polishing not easy to scratch, especially right when being use
There is the polishing equipment of concave convex texture, but the intensity of the sand paper is not high in surface, the service life of sand paper is limited.
Authorization Notice No. is that the Chinese patent literature of CN204397644U discloses a kind of leather sand paper, including a leather
Layer, the one side house boat abrasive sand granulosa of the leather layer, another side is coated with gluing oxidant layer.The abrasive grit of the utility model
It is placed on leather, there is preferable flexibility, but when polishing male and fomale(M＆F), buffering effect is poor, polishing effect is limited, and frosted
Granulosa easily damages.
Existing abrasive material flexibility is insufficient, and buffering effect is poor in bruting process, is unfavorable for curved-surface materials of polishing, particularly
Surface is the material of non-uniform male and fomale(M＆F).
Invention content
In order to solve the problems, such as that the flexibility of existing sand paper is insufficient, curved-surface materials polishing is ineffective, the present invention provides
The leather sand paper and preparation method of a kind of curved-surface materials of polishing.
A kind of preparation method of the leather sand paper for curved-surface materials of polishing, includes the following steps：
Step (1)：Grind the preparation of leather composite bed：Prepare abrasive grains coating；Then by abrasive grains coating even spread
In leather layer surface, baking and curing must grind leather composite bed；Abrasive grains paint solidification forms abrasive material；
Step (2)：Grind the preparation of leather sponge composite bed：The leather of grinding leather composite bed prepared by step (1)
Layer surface be coated with one layer of compound adhesive, then with spongy layer pipe sensitive adhesion, formed grinding leather sponge composite bed；
Step (3)：The preparation of film suede composite bed：It is compound with silk raising layer by one layer of compound adhesive of coated on one side of waterproof layer
Pipe sensitive adhesion forms film suede composite bed；
Step (4)：The preparation of leather sand paper：By one layer of compound adhesive of waterproof level even spread of film suede composite bed, then
Spongy surface pipe sensitive adhesion with grinding leather sponge composite bed, is made leather sand paper.
Prepared abrasive grains coating is coated on to the surface of leather layer, and is cured in the skin drying of leather layer, so as to
Adhere to one layer of abrasive material in the adhesion of leather level；Then it is the leathering and spongy layer adhesion that grind leather composite bed is compound；Again
Film suede composite bed and above-mentioned grinding leather sponge composite bed is compound, the leather sand paper with five-layer structure is made.Present invention side
Method is not using the conventional production method according to the successively adhesion of sand paper structure, but the sponge that will grind leather sponge composite bed
Face and the waterproof level stick to each other of film suede composite bed are compound.This method makes compound adhesive be coated on the preferable leather of profile pattern
In layer and waterproof layer, production difficulty is not only reduced, moreover it is possible to which spongy layer is drawn with silk during good solution prepares leather sand paper
The leather sand paper that the adhesion homogeneity of pile layer is poor, prepares it is of low quality the problems such as.
The preparation process of abrasive grains coating is：By weight, by 200-350 parts of abrasive grains, 500-600 parts of phenolic resin,
280-350 parts of epoxy resin mixing, 100-200 parts of volatile organic solvents of addition are diluted, and after being stirred, add 110-
200 parts of curing agent are stirred for 20-40min and obtain the abrasive grains coating.
In the method for the present invention, abrasive grains coating is uniformly coated on to the surface of leather layer, abrasive material include adhesion oxidant layer and
Partial denudation is in the abrasive grains of adhesion oxidant layer upper surface.The adhesion oxidant layer is by above-mentioned phenolic resin, epoxy resin, volatilization
Property organic solvent, curing agent solidification form.
Preferably, the abrasive grains are diamond, white fused alumina, Brown Alundum, green silicon carbide and black silicon carbide one kind or
It is a variety of.
Preferably, the grain size of abrasive grains is 0.5-150 microns.
In abrasive grains coating, phenolic resin, epoxy resin mainly play cementation, and abrasive grains stabilization is made to stick in leather base
Material surface.Phenolic resin and epoxy resin are cross-linked with each other curing under curing agent effect, and the abrasive material formed is with good
Physical strength and chemical stability, phenolic resin assign the good high temperature resistance of abrasive material, and it is good that epoxy resin assigns abrasive material
Good flexibility.
The heat release in bruting process of leather sand paper is obvious, and damage of the operation to sand paper is bigger under long term high temperature.Hair
Heat problem can be alleviated by wet milling process, but wet-milling has higher requirements to the water resistance of Sand paper for polishing.
It is good water-fast that abrasive material can be assigned using preparation method of the present invention and with reference to hydrophobicity abrasive grains coating
Performance.
Preferably, the phenolic resin is oil-soluble phenolic resin.
Oil-soluble phenolic resin has good water resistance, acid resistance, solvent resistance and electrical insulating property.With epoxy resin and
Curing agent crosslinking is fast, good in the adhesive force of leather layer, and the abrasive material of preparation has preferable hardness and toughness.Water-insoluble phenol
The adhesion intensity of urea formaldehyde and leather layer is big, during wet-milling, abrasive material not easy damaged.
Existing oil-soluble phenolic resin can complete the object of the invention.Further, the oil-soluble phenolic resin is excellent
Select Jinan holy well group PF-6560, PF-6573, PF-6816, PF-6130 or PF-9300.
Existing epoxy resin can all complete the present invention, but in order to improve the curved surface of leather sand paper polishing effect, Sand paper for polishing
Must have preferable toughness and intensity, epoxy content is higher or can be better by the effect of toughening-modifiedepoxy resin, such as passes through
Cross the epoxy resin of polysiloxane toughening modification.
Preferably, the present invention is using high molecular expoxy resin, and epoxide equivalent is between 1650-3300 (g/eq).Such as south
Sub- epoxy resin NPES-607, NPES-627, NPES-628, NPES-629, NPES-619 or NPES-669.Above-mentioned epoxy resin
Softening point temperature is 120-150 DEG C, has good processing performance.
The curing agent is existing epoxy curing agent, such as conventional solidified dose of aliphatic polyamine, aromatic multi-amine,
Preferably, the curing agent is IPDA, DDM, polyetheramine or polyamide.
Above-mentioned curing agent is cheap, high with above-mentioned epoxy resin and the phenolic resin degree of cross linking, the object of cured abrasive material
It is high to manage intensity, and toughness is strong, abrasive material is not easy to crack.
The volatile organic solvent is ethyl acetate, methyl tertiary butyl ether(MTBE), normal heptane, cyclohexanone, butanone, hexamethylene
It is one or more.
Above-mentioned hydrophobic organic solvent can be mutually dissolved phenolic resin, epoxy resin and curing agent, and each material is made to exist
Cross-linked polymeric curing is carried out under homogeneous phase condition, and above-mentioned solvent boiling point is moderate, the abrasive material configuration of surface after elevated cure is good.
Preferably, the preparation process of abrasive grains coating is：By weight, by 300 parts of 100 microns of white fused alumina, 500
Part phenolic resin, 280 parts of epoxy resin mixing, 100-200 parts of ethyl acetate of addition are diluted, after being stirred, addition 110
Part curing agent, is stirred for 20min and obtains the abrasive grains coating.
Preferably, abrasive grains coating is 100-200 microns in the coating thickness of leather layer.
Abrasive grains coating described herein actually refers to the thickness of adhesion oxidant layer in the coating thickness of leather layer.Coating is completed
Afterwards, cure drying under high temperature, so as in one layer of abrasive material of surfaces stick of leather layer.Abrasive grains coating is in the painting of leather layer surface
Cloth thickness can influence the cutting force and stability of abrasive material to a certain extent, and coating thickness is excessive may to cause the de- of abrasive material
It falls；Coating thickness is too small, and abrasive material is easy to wear, and leather sand paper easily fails, and service life is short.
Further preferably, abrasive grains coating is 140-160 microns in the coating thickness of leather layer.
Preferably, in step (1), the temperature of baking and curing is 110-130 DEG C.
After abrasive grains coating is coated on leather layer surface, it is 120-130 DEG C that wet grinding leather composite bed, which first passes through temperature,
Drying tunnel winding, then enter back into baking oven and cured.Drying temperature can largely influence the quality of abrasive material.Temperature
When relatively low, drying time is long, and solidification effect is poor, and the cutting force of prepared leather sand paper is not high, and polishing effect can compare
Difference.When the temperature is excessively high, the solvent volatilization in abrasive grains coating is too fast, and it is untidy to be easy to cause abrasive material layer surface, and it is possible that opens
It splits or even comes off from leather layer.
Preferably, in step (1), the time of baking and curing is 30-60h.
Further preferably, in step (1), the time of baking and curing is 45-50h.
Preferably, the leather layer, using foaming PU or PVC leathers, leather layer thickness is 200-800 microns.
The cost of PU, PVC leather is low, material environment friendly.Abrasive material is preferable in the adhesion fixed function of the leather layer.Institute
Good flexibility and anti-tear tensile strength can be provided for leather sand paper by stating the leather substance of thickness, so as to improve the song of leather sand paper
Face polishing effect.
Will grind leather composite bed leathering coating compound adhesive, by 60-90 DEG C drying tunnel dry 1-3min, then with sea
Continuous layer is compound.Preferably, the compound adhesive is aqueous compound adhesive.
Aqueous compound adhesive mainly plays adhesion, and existing aqueous compound adhesive all can be applied to the present invention as adhesion agent
In.Further preferably, the aqueous compound adhesive uses FH-55 types (Wuxi City Qian Zhou coating materials factory).The glued membrane of the glue is soft
Soft, water resistance is good, is particularly suitable for the adhesion of the leather layer, waterproof layer of the present invention.
The spongy layer being arranged below leather layer can cooperate with the curved surface polishing ability for improving leather sand paper with leather layer, as
It is preferred that the sponge uses EVA, PE or PU sponge, the shore hardness of the sponge is 30-70 degree.
It grinds leather composite bed and is coated with one layer of compound adhesive, after drying tunnel is dried, by composite roll, and sponge pipe sensitive adhesion,
Form grinding leather sponge composite bed.The sponge surface hole of above-mentioned material is moderate, helps to improve the adhesion with leather layer and consolidates
Determine intensity, reduce the defect rate of production process.Above-mentioned sponge also has preferable deformation nature, helps to buffer in bruting process
The pressure that frosted layer is born；There is preferable resilience performance simultaneously, the polishing for making object particularly curved face object is more uniform.
The shore hardness of above-mentioned sponge can effectively improve leather sand paper intensity, recovery shape of the leather sand paper in bruting process
Become functional.
Preferably, the waterproof layer uses PET, PE or PU elastic membranes.
The water repellent effect of the elastic membrane of above-mentioned material is good, and flexibility and elasticity are stronger.In process, first by waterproof layer
One layer of compound adhesive of a face even spread, after drying tunnel is dried, by composite roll, with the compound pipe sensitive adhesion of silk raising layer, formed
Film suede composite bed.Again by one layer of compound adhesive of elastic film surface even spread of film suede composite bed, after drying tunnel is dried, process is compound
Roller, the spongy surface pipe sensitive adhesion with grinding leather sponge composite bed, forms leather sand paper of the present invention.
Preferably, the thickness of the waterproof layer is 15-45 microns.
Further preferably, the thickness of the waterproof layer is 25 microns.
Waterproof layer is arranged between spongy layer and silk raising layer, not only increases the stick to each other stability of each layer；It is also anti-
Only during wet-milling, the water of sponge absorption enters a raising layer, leather sand paper is caused to come off so as to reduce a raising layer when making moist
Situation.
The invention also includes step (5)：Leather sand paper obtained by step (4) is die cut cutification according to required size
Remove from office sand paper product.
The invention also includes it is a kind of using above-mentioned preparation method prepare curved-surface materials of polishing leather sand paper, including by
Abrasive material, leather layer, spongy layer, waterproof layer and the silk raising layer set gradually under above.
Using abrasive material as the leather sand paper surface (above), be fixed to each other and set by above-mentioned level by gluing technique
It puts.The abrasive material on surface provides good flexibility for abrasive material, is effectively increased leather for utensil of polishing, the leather layer of lower floor
The intensity of sand paper, so as to improve the sanding property of sand paper.The spongy layer of one layer of buffering, spongy layer and leather are set under leather layer
Layer cooperation, ensure sand paper it is flexible under the premise of, promoted leather sand paper bruting process in abrasive material and application of a surface
Intensity improves the curved surface sanding property of leather sand paper；The liquid such as storage water are additionally aided simultaneously, thus and leather layer, waterproof layer
Cooperation improves the wet-milling ability of leather sand paper.Waterproof layer can also provide planarization for the silk raising layer of lower floor, improve silk raising layer
Adhesion fixing intensity.Leather sand paper is movably fixed on milling tools by silk raising layer, leather sand paper is improved and is polishing
Stability in the process.The leather sand paper of curved-surface materials provided by the invention of polishing has five-layer structure, and each layer structure phase
Mutually cooperation, collaboration increase the flexibility of the leather sand paper, polishing resiliency, polish so as to fulfill the curved-surface materials of leather sand paper
Effect.
The preparation method of the leather sand paper of curved-surface materials provided by the invention of polishing is easy to operate, the leather sand paper of preparation
It is high-quality, suitable for industrial mass production.The flexibility of leather sand paper height, the cushion performance prepared using the method for the present invention
Well, high with the compactness on curved-surface materials surface, the curved-surface materials polishing effect of leather sand paper is good, and the use of leather sand paper is stablized
Property it is high.
Description of the drawings
Fig. 1 is the structure diagram using the leather sand paper prepared by the method for the present invention.
Specific embodiment
A kind of leather sand paper for curved-surface materials of polishing, including from top to bottom successively the abrasive material of adhesion, leather layer 3, sea
Continuous layer 4, waterproof layer 5, silk raising layer 6.
Abrasive material includes adhesion oxidant layer 1 and partial denudation in the abrasive grains 1 of 1 upper surface of adhesion oxidant layer, the grain size of abrasive grains 1
It it is 0.5-150 microns, using the one or more of diamond, white fused alumina, Brown Alundum, green silicon carbide and black silicon carbide.Abrasive material
Thickness be 100-200 microns, preferably 140-160 microns.
For leather layer 3 using foaming PU or PVC leathers, 3 thickness of leather layer is 200-800 microns.
Spongy layer 4 uses EVA, PE or PU sponges.The shore hardness of spongy layer 4 is 30-70 degree.
Waterproof layer 5 uses PET, PE or PU elastic membranes.The thickness of waterproof layer 5 is 15-45 microns.
The leather sand paper of above structure is prepared by implementation below：
Embodiment 1：
Step (1)：Grind the preparation of leather composite bed：
Prepare the preparation of abrasive grains coating：By weight, (river pigeon grinding materials and grinding tool has 300 parts of 100 microns of white fused alumina
Limit company), 500 parts of phenolic resin (PF-9300；Shengquan Group Co. Ltd., Jinan), 280 parts of epoxy resin
(NPES-619；South Epoxy Resin (Kunshan) Co., Ltd.) mixing, it adds 100 parts of ethyl acetate and is diluted, stirring is mixed
After conjunction, the soluble curing agent (R-2015 of 110 parts of addition；Guangzhou Rui Qi Chemical Co., Ltd.s), it is stirred for 20-40min and obtains
The abrasive grains coating.Concrete component and proportioning are shown in Table 1：
Table 1
| Component | Weight (g) | Nonvolatile element (%) | Weight (g) after drying |
| White fused alumina | 300 | 100 | 300 |
| Phenolic resin | 500 | 30 | 150 |
| Epoxy resin | 280 | 30 | 84 |
| Curing agent | 110 | 60 | 66 |
By precision coating machine, on abrasive grains coating even spread and leather layer, by wet grinding leather composite bed
Wound through surface drying at 130 DEG C of drying tunnel, abrasive material thickness control at 100 microns, then through baking oven 120 degree toast 48 hours, cure
Agent obtains grinding leather composite bed after fully reacting.
Step (2)：Grind the preparation of leather sponge composite bed：
One layer of aqueous compound adhesive (FH-55, nothing are coated with by leather layer surface of the precision coating machine in grinding leather composite bed
Tin city Qian Zhou coating materials factory), go out drying tunnel after 80 DEG C of baking 1min of drying tunnel, be 40 degree by shore hardness by press bonding roller
PU sponges press with glue layer, obtain grinding leather sponge composite bed.
Step (3)：The preparation of film suede composite bed：Thickness is 25 microns of PET elastic membranes through method of roll coating even spread one
The aqueous compound adhesive (FH-55, Wuxi City Qian Zhou coating materials factory) of layer, crosses drying tunnel, with the compound pressing of silk raising layer, forms film suede and answers
Close layer.
Step (4)：The preparation of leather sand paper：It is aqueous compound in one layer of the PET elasticity film surfaces even spread of film suede composite bed
Glue (FH-55, Wuxi City Qian Zhou coating materials factory) crosses drying tunnel, by composite roll, the spongy surface with grinding leather sponge composite bed
Leather sand paper is made in pipe sensitive adhesion.
Step (5)：The preparation-obtained leather sand paper of step (4) is die cut to obtain the production of leather sand paper according to required size
Product.
Embodiment 2：
Compared with embodiment 1, the difference lies in, using 150 microns of white fused alumina, other parameter and operating method referring to
Embodiment 1.
Embodiment 3：
It is compared with embodiment 1, the difference lies in using 100 microns of green silicon carbides (producer, model), other parameter
And operating method is referring to embodiment 1.
Embodiment 4：
It is compared with embodiment 1, the difference lies in prepare abrasive grains coating using the component and proportioning of table 2：
Table 2
| Component | Weight (g) | Nonvolatile element (%) | Weight (g) after drying |
| White fused alumina | 200 | 100 | 200 |
| Phenolic resin | 500 | 30 | 150 |
| South Asia epoxy resin | 280 | 30 | 84 |
| Curing agent | 110 | 60 | 66 |
Operating method is referring to embodiment 1.
Embodiment 5：
It is compared with embodiment 1, the difference lies in the thickness of abrasive material is 200 microns.
Embodiment 6：
It is compared with embodiment 1, the difference lies in prepare abrasive grains coating using the component and proportioning of table 3：
Table 3
| Component | Weight (g) | Nonvolatile element (%) | Weight (g) after drying |
| White fused alumina | 250 | 100 | 200 |
| Phenolic resin | 600 | 30 | 150 |
| South Asia epoxy resin | 350 | 30 | 84 |
| Curing agent | 200 | 60 | 66 |
Operating method is referring to embodiment 1.
Comparative example 1：
It is compared with embodiment 1, the difference lies in, wet grinding leather composite bed is passed through to be toasted 12 hours in baking oven 180 degree,
Curing agent obtains grinding leather composite bed after fully reacting.
The sign parameter of leather sand paper prepared by above-described embodiment and comparative example is as shown in table 4：
Table 4
By table 4 it is found that leather sand paper prepared by the method for the present invention has preferable cutting force and radian qualification rate, leather
The curved-surface materials polishing effect of sand paper is good, and the stability in use of leather sand paper is high.
Claims (8)
1. a kind of preparation method of the leather sand paper for curved-surface materials of polishing, which is characterized in that include the following steps：
Step (1)：Grind the preparation of leather composite bed：Prepare abrasive grains coating；Then abrasive grains coating is uniformly coated on skin
Layer surface is removed from office, baking and curing must grind leather composite bed；Abrasive grains paint solidification forms abrasive material；
Step (2)：Grind the preparation of leather sponge composite bed：The leather layer table of grinding leather composite bed prepared by step (1)
Face be coated with one layer of compound adhesive, then with spongy layer pipe sensitive adhesion, formed grinding leather sponge composite bed；
Sponge uses EVA, PE or PU sponge, and the shore hardness of the sponge is 30-70 degree；
Step (3)：The preparation of film suede composite bed：By one layer of compound adhesive of coated on one side of waterproof layer, with the compound pressing of silk raising layer
It bonds, forms film suede composite bed；
Step (4)：The preparation of leather sand paper：By one layer of compound adhesive of waterproof level even spread of film suede composite bed, described is anti-
Water layer uses PET, and then with the spongy surface pipe sensitive adhesion of grinding leather sponge composite bed, leather sand is made in PE or PU elastic membranes
Paper.
2. the preparation method of the leather sand paper for the curved-surface materials that can polish as described in claim 1, which is characterized in that abrasive grains apply
The preparation process of material is：By weight, by 200-350 parts of abrasive grains, 500-600 parts of phenolic resin, 280-350 parts of epoxy resin
Mixing, 100-200 parts of volatile organic solvents of addition are diluted, and after being stirred, add 110-200 parts of curing agent, then stir
It mixes 20-40min and obtains the abrasive grains coating.
3. the preparation method of the leather sand paper for the curved-surface materials that can polish as claimed in claim 2, which is characterized in that step (1)
In, the temperature of baking and curing is 110-130 DEG C.
4. the preparation method of the leather sand paper for the curved-surface materials that can polish as claimed in claim 3, which is characterized in that abrasive grains apply
The coating thickness expected in leather layer is 100-200 microns.
5. the preparation method of the leather sand paper for the curved-surface materials that can polish as described in claim 1, which is characterized in that the grinding
Grain is the one or more of diamond, white fused alumina, Brown Alundum, green silicon carbide and black silicon carbide.
6. the preparation method of the leather sand paper for the curved-surface materials that can polish as claimed in claim 5, which is characterized in that abrasive grains
Grain size is 0.5-150 microns.
7. the preparation method of the leather sand paper for the curved-surface materials that can polish as described in claim 1, which is characterized in that the skin
Layer is removed from office using foaming PU or PVC leathers, leather layer thickness is 200-800 microns.
8. the leather sand paper for curved-surface materials of polishing prepared such as any one of claim 1-7 preparation methods, which is characterized in that packet
Include the abrasive material from top to bottom set gradually, leather layer, spongy layer, waterproof layer and silk raising layer.
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| CN107081687A (en) * | 2017-05-27 | 2017-08-22 | 江苏省江南新型复合研磨材料及制品工程技术研究中心有限公司 | A kind of processing technology of water proof abrasive cloth |
| CN107756269A (en) * | 2017-09-14 | 2018-03-06 | 湖北丽尔家日用品股份有限公司 | A kind of elastomeric polishing element and preparation method thereof |
| CN113165147A (en) * | 2018-12-18 | 2021-07-23 | 3M创新有限公司 | Fast curing bonded abrasive article precursor |
| CN110712143B (en) * | 2019-11-07 | 2021-05-18 | 安徽禾臣新材料有限公司 | Tensile white mill leather and production method thereof |
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| CN104139345A (en) * | 2014-07-23 | 2014-11-12 | 上虞市自远磨具有限公司 | Wear-resisting grinding tool with thin film base and manufacturing method of wear-resisting grinding tool |
| CN204397644U (en) * | 2014-09-03 | 2015-06-17 | 深圳市宝安区沙井创研表面处理材料经营部 | Leather sand paper |
| CN104742034A (en) * | 2015-03-27 | 2015-07-01 | 蓝思科技股份有限公司 | Polishing skin and method for polishing cambered surface of micro ceramic product through same |
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Address after: 312300 Lijiabao Village, Lianghu Town, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: Shaoxing self far grinding Co., Ltd. Address before: 312300 Lijiabao Village, Lianghu Town, Shangyu District, Shaoxing City, Zhejiang Province Patentee before: SHANGYU ZIYUAN GRINDING TOOL CO., LTD. |
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