WO2008035934A1 - Coated abrasive disk and preparation thereof - Google Patents
Coated abrasive disk and preparation thereof Download PDFInfo
- Publication number
- WO2008035934A1 WO2008035934A1 PCT/KR2007/004597 KR2007004597W WO2008035934A1 WO 2008035934 A1 WO2008035934 A1 WO 2008035934A1 KR 2007004597 W KR2007004597 W KR 2007004597W WO 2008035934 A1 WO2008035934 A1 WO 2008035934A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coated abrasive
- glass fiber
- layer
- fiber paper
- impregnation
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
Definitions
- the present invention relates to a glass fiber paper layer- containing coated abrasive disk which has improved flexibility, dimensional stability, and rotation failure resistance, and a method for preparing said coated abrasive disk.
- Conventional coated abrasive disks comprising a vulcanized fiber substrate shown in FIG. 1 are prepared by coating an adhesive resin on the vulcanized fiber substrate to form a first adhesive layer, spreading a layer of an abrasive material thereon, pre-drying, coating the abrasive layer with a second layer of an adhesive resin and drying the coated layer.
- the coated abrasive disk thus obtained has problems in that its shape may become distorted by heat during the drying process, and its impact strength is poor. Therefore, the above conventional method requires post-treatment steps, i.e., humidification and aging steps, to impart dimensional stability and impact resistance to the final abrasive disk.
- Korean Patent No. 10-046922 discloses a method for preparing a coated abrasive disk by coating an adhesive on a back pad disk comprised of a non-woven fabric and a layer of textile (a layer of carbon fiber textile, a layer of glass fiber textile, or a stack thereof), and bonding the back pad to a coated abrasive layer comprising a backsheet and a layer of an abrasive material, followed by heat-pressing.
- the coated abrasive disk prepared by such a method shown in FIG. 2, exhibits relatively good properties in terms of dimensional stability and rotation failure resistance. However, it suffers from poor flexibility and a high manufacturing cost.
- a coated abrasive disk which comprises:
- a non-woven fabric (2) at least one impregnation-treated glass fiber paper layer obtained by impregnation treating a glass fiber paper made of a mixture of glass fibers and wood fibers with a resin; and
- a coated abrasive layer having a backsheet to be bonded to the impregnation-treated glass fiber paper layer and a layer of an abrasive material coated on the surface opposite to the backsheet, wherein the non- woven fabric, the glass fiber paper layer and the coated abrasive layer are sequentially stacked and tightly bonded together.
- FIGs. 1 and 2 schematic diagrams of conventional coated abrasive disks
- FIG. 3 a schematic diagram of a glass fiber paper layer-containing coated abrasive disk in accordance with the present invention
- FIG. 4 a schematic diagram of a coater which is used in impregnation-treatment of a substrate with a resin
- FIG. 5 a schematic diagram of a steel holder which is used in the preparation of the inventive coated abrasive disk.
- backsheet 124 first adhesive layer
- abrasive material 128 second adhesive layer 130 : carbon fiber textile layer 140 : third adhesive layer
- vulcanized fiber substrate 160 glass fiber textile layer 170 : drier
- the coated abrasive disk of the present invention has a structure comprising one non-woven fabric; at least one glass fiber paper layer impregnation-treated with a resin; and one coated abrasive layer which are sequentially stacked and combined tightly together.
- Such an inventive coated abrasive disk is illustrated in FIG. 3.
- the non-woven fabric which is used in the present invention may have a specific weight of 20 to 30 g/m 2 , a thickness of 0.1 to 0.3 mm, and a flat or embossed shape.
- the glass fiber paper which is employed in the present invention is made of a mixture of 70 to 90% by weight, preferably 70 to 80% by weight of glass fibers and 10 to 30% by weight, preferably 20 to 30% by weight of wood fibers, and it may be prepared by a conventional sheet manufacturing process using 5 to 10 mm-long glass fiber fragments having a thickness of 5 to 20 ⁇ m together with a wood fiber powder.
- the glass fiber paper is also impregnation-treated with an adhesive resin and is pre-dried.
- the adhesive resin may be incorporated into the textile in an amount ranging from 90 to 200 g/m 2 .
- the pre-drying of the impregnation-treated glass fiber paper may be performed at a temperature ranging from 80 to 100 ° C for 1 to 3 min.
- the glass fiber paper before impregnation-treatment with the resin may have a specific weight of 45 to 80 g/m 2 and a thickness of 0.25 to 0.65 mm, and it is preferably of a flat shape.
- the adhesive resin employed in the impregnation-treatment of the glass fiber paper include a phenol resin, epoxy resin, urea melamine, polyester resin, polyvinyl butyral, acrylonitrile- butadiene-rubber latex, degenerated heat-curable resin, and a mixture thereof.
- a suitable phenol resin is of a resole-type having a solid content of 40 to 60 % by weight and a viscosity of 400 to 700 cps at 25 ° C .
- FIG. 4 A schematic diagram of a coater which is used in impregnation-treating the glass fiber paper with a resin is shown in FIG. 4.
- the glass fiber paper confers on the final coated abrasive disk improvements in flexibility, dimensional stability, and rotation failure resistance, and it also makes it possible to reduce the manufacturing cost.
- the coated abrasive layer which is employed in the present invention may be a conventional one comprising a backsheet and a layer of an abrasive material stacked thereon.
- Suitable for use as the backsheet are cotton textiles, polyester textiles, rayon textiles, polyester/cotton mixed textiles and polyester film (PET film), while particles of alumina (Al 2 O 3 ), silicon carbide (SiC), alumina zirconia (AZ), ceramics (sol-gel), CBN (cubic boron nitride), diamond and a mixture thereof are preferred as the abrasive material.
- the coated abrasive disk of the present invention is manufactured by sequentially placing a non-woven fabric, at least one glass fiber paper impregnation-treated with a resin, and a coated abrasive layer in the steel holder shown in FIG. 5, applying a pressure of 5 to 7 kgf/cm 2 to the resulting stack of layers, and heating the pressed stack in an oven at 120 to 150 ° C for 5 to 8 hrs to allow the resin impregnated in the glass fiber paper to melt, resulting in the fusion of the component layers.
- the backsheet of the coated abrasive layer is brought into contact with the glass fiber paper.
- the non-woven fabric, glass fiber paper layer and coated abrasive layer are each pre-cut in the form of a disk.
- the inventive glass fiber paper layer-containing coated abrasive disk shows improved flexibility, dimensional stability, and rotation failure resistance.
- the inventive disk is sufficiently light to provide enhanced handling characteristics.
- the manufacturing cost of the inventive disk is much lower as compared as conventional disks.
- the inventive disk is useful for various applications including removal of rust, removal of old car paint, and grinding of metal welding sites and cutting sites.
- Cut into a disk form having an outer diameter of 180mm and an inner diameter of 23 mm were: a 25 g/m 2 non-woven fabric (commercially available from Doraei Saehan Company) having a thickness of 0.15 mm; a processed glass fiber paper (commercially available from Korea Carbon Company); and a coated abrasive layer P628 #36 Ywt (commercially available from Sun Abrasives Co. Ltd.,).
- the processed glass fiber paper was prepared by impregnation-treating with a phenol resin an untreated glass fiber paper (thickness: 0.28mm, specific weight: 45 g/m 2 ) made of a mixture of 80% by weight of 10 jum-thick glass fibers and 20% by weight of powdered wood fibers (commercially available from Kolon) and pre-drying the treated glass fiber paper at 90 ° C for 1 min.
- the non-woven fabric, glass fiber paper impregnation-treated with a phenol resin, and coated abrasive layer were sequentially stacked from the bottom in a steel holder (FIG. 5), pressed at a force of 6.0 kgf/cm 2 , and the pressed stack was heated at 145 ⁇ 5 ° C for 5 hrs to combine them tightly together, to obtain the coated abrasive disk in accordance with the present invention (see FIG. 3).
- the abrasive material layer of the coated abrasive layer was placed on the top of the stack, facing upwards.
- Example 3 The procedure of Example 1 was repeated except that one glass fiber paper prepared by impregnation-treating an untreated glass fiber paper (thickness: 0.35 mm, specific weight: 60 g/m 2 )(commercially available from Korea Carbon Company) with a phenol resin and pre-drying at 90 ° C for 1.5 min was used, to obtain another inventive coated abrasive disk. The amount of the phenol resin incorporated into the glass fiber paper was 120 g/m 2 .
- Example 3 The amount of the phenol resin incorporated into the glass fiber paper was 120 g/m 2 .
- Example 1 The procedure of Example 1 was repeated except that one glass fiber paper prepared by impregnation-treating an untreated glass fiber paper (thickness: 0.6 mm, specific weight: 80 g/m 2 )(commercially available from Korea Carbon Company) with a phenol resin and pre-drying at 90 ° C for 2 min was used, to obtain another inventive coated abrasive disk.
- the amount of the phenol resin incorporated into the glass fiber paper was 200 g/m 2 .
- Example 1 The procedure of Example 1 was repeated except that two glass fiber papers were used, to obtain another inventive coated abrasive disk.
- Comparative Example 1 A 1.0 mm-thick vulcanized fiber substrate (commercially available from Toyo Fiber Company, Japan) was cut into a disk form having an outer diameter of 180 mm and an inner diameter of 23 mm.
- a first adhesive of a mixture of phenol resin and CaCO 3 (50:50 weight ratio) was coated in an amount of 245 g/m 2 .
- a second adhesive of a mixture of phenol resin and CaCO 3 (40:60 weight ratio) was coated on the abrasive material formed on the substrate in an amount of 450 g/m 2 , and dried and cured in an oven of 60 to 110 ° C for 240 min, to form the coated abrasive disk (see FIG. 1).
- Cut into a disk form having an outer diameter of 180 mm and an inner diameter of 23 mm were: a 25 g/m 2 non-woven fabric (commercially available from Doraei Saehan Company) having a thickness of 0.15 mm; a glass fiber textile (commercially available from Korea Fiber Company) composed of H45 1/4 X H45 1/4 (warp X fill) tex/yarn fibers (H means that average diameters of the fibers are in the ranges of 10.16 to 11.42 ⁇ m) and having a leno plain fabric pattern of 8 X 8 (warp X fill) count/inch; a carbon fiber textile (commercially available from Korea Fiber Company) composed of G75 1/0 X E225 1/0 (warp X fill) tex/yarn fibers (E and G mean that average diameters of the fibers are in the range of 6.35 to 7.61 ⁇ m and 8.89 to 10.15 ⁇ m, respectively) and having a satin fabric pattern of 58 X 30 (warp X fill) count/
- the non-woven fabric, glass fiber paper impregnation-treated with a phenol resin, and coated abrasive layer were sequentially stacked from the bottom in a steel holder (FIG. 5), pressed at a force of 6.0 kgf/cm 2 , and the pressed stack was heated at 145 ⁇ 5 ° C for 5 hrs to combine them tightly together, to obtain another conventional coated abrasive disk.
- the abrasive material layer of the coated abrasive layer was placed on the top of the stack, facing upwards.
- Examples 1 to 4 exhibit improved properties in terms of rotation failure resistance, flexibility and/or dimensional stability, as compared to the conventional abrasive disks of Comparative Examples 1 and 2. Further, the manufacturing cost of the inventive coated abrasive disks is lower by 15 to 20% than that of the conventional disks.
- the inventive coated abrasive disk exhibits improved flexibility, elasticity, dimensional stability, and rotation failure resistance, and it is light and inexpensive to manufacture.
- the inventive disk is useful for various applications including removal of rust, removal of old car paint, and grinding of metal welding sites and cutting sites.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2006-0091931 | 2006-09-21 | ||
KR1020060091931A KR100802512B1 (ko) | 2006-09-21 | 2006-09-21 | 연마 디스크 및 그의 제조방법 |
Publications (1)
Publication Number | Publication Date |
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WO2008035934A1 true WO2008035934A1 (en) | 2008-03-27 |
Family
ID=39200716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2007/004597 WO2008035934A1 (en) | 2006-09-21 | 2007-09-20 | Coated abrasive disk and preparation thereof |
Country Status (2)
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KR (1) | KR100802512B1 (ko) |
WO (1) | WO2008035934A1 (ko) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2286959A3 (de) * | 2009-08-22 | 2011-03-16 | August Rüggeberg GmbH & Co. KG | Schrupp-Schleif-Werkzeug |
CN106181787A (zh) * | 2016-07-23 | 2016-12-07 | 高昊 | 一种能同步消耗的复合纤维基体砂轮的制备方法 |
CN107009287A (zh) * | 2017-04-07 | 2017-08-04 | 江苏新砺河磨具科技有限公司 | 一种钢轨打磨砂轮的制造方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100872507B1 (ko) * | 2007-02-28 | 2008-12-08 | 주식회사 썬텍인더스트리 | 연마 디스크 및 이의 제조방법 |
KR102436001B1 (ko) * | 2016-03-30 | 2022-08-23 | 코오롱인더스트리 주식회사 | 외관 품질이 향상된 인공피혁 및 이의 제조방법 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5560753A (en) * | 1992-02-12 | 1996-10-01 | Minnesota Mining And Manufacturing Company | Coated abrasive article containing an electrically conductive backing |
US20040072522A1 (en) * | 2002-06-18 | 2004-04-15 | Angela Petroski | Gradient polishing pad made from paper-making fibers for use in chemical/mechanical planarization of wafers |
US20060026905A1 (en) * | 2003-12-09 | 2006-02-09 | Suntek Industries, Ltd. | Preparation of coated abrasive disk |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2323400A (en) | 1999-02-01 | 2000-08-25 | Bridgestone Corporation | Grinding beads and beads production method and device therefor |
KR200360927Y1 (ko) | 2004-05-17 | 2004-09-06 | 태양연마 주식회사 | 연마휠의 백패드 |
US7497884B2 (en) | 2004-12-30 | 2009-03-03 | Neenah Paper, Inc. | Fine abrasive paper backing material and method of making thereof |
-
2006
- 2006-09-21 KR KR1020060091931A patent/KR100802512B1/ko active IP Right Grant
-
2007
- 2007-09-20 WO PCT/KR2007/004597 patent/WO2008035934A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5560753A (en) * | 1992-02-12 | 1996-10-01 | Minnesota Mining And Manufacturing Company | Coated abrasive article containing an electrically conductive backing |
US20040072522A1 (en) * | 2002-06-18 | 2004-04-15 | Angela Petroski | Gradient polishing pad made from paper-making fibers for use in chemical/mechanical planarization of wafers |
US20060026905A1 (en) * | 2003-12-09 | 2006-02-09 | Suntek Industries, Ltd. | Preparation of coated abrasive disk |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2286959A3 (de) * | 2009-08-22 | 2011-03-16 | August Rüggeberg GmbH & Co. KG | Schrupp-Schleif-Werkzeug |
CN106181787A (zh) * | 2016-07-23 | 2016-12-07 | 高昊 | 一种能同步消耗的复合纤维基体砂轮的制备方法 |
CN107009287A (zh) * | 2017-04-07 | 2017-08-04 | 江苏新砺河磨具科技有限公司 | 一种钢轨打磨砂轮的制造方法 |
Also Published As
Publication number | Publication date |
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KR20070020359A (ko) | 2007-02-21 |
KR100802512B1 (ko) | 2008-02-12 |
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