CN102899912A - Manufacturing method for simulation leather of frosted genuine leather - Google Patents
Manufacturing method for simulation leather of frosted genuine leather Download PDFInfo
- Publication number
- CN102899912A CN102899912A CN2011102157371A CN201110215737A CN102899912A CN 102899912 A CN102899912 A CN 102899912A CN 2011102157371 A CN2011102157371 A CN 2011102157371A CN 201110215737 A CN201110215737 A CN 201110215737A CN 102899912 A CN102899912 A CN 102899912A
- Authority
- CN
- China
- Prior art keywords
- minutes
- frosted
- dimethyl formamide
- mixture
- genuine leather
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010985 leather Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000004088 simulation Methods 0.000 title abstract 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 30
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000004049 embossing Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 229920002635 polyurethane Polymers 0.000 claims abstract description 7
- 239000004814 polyurethane Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 230000008961 swelling Effects 0.000 claims abstract description 7
- 239000002023 wood Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 238000005187 foaming Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims description 13
- 241001494479 Pecora Species 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000004753 textile Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000002649 leather substitute Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a manufacturing method for simulation leather of frosted genuine leather. The method comprises the steps of mixing 5-10 kg of dimethyl formamide and 0.5-2 kg color paste uniformly; filtering the mixture; adding 100-120 kg of dimethyl formamide and 20-30 kg of wood powder to the above mixture, stirring uniformly, swelling and mixing with filtered mixture uniformly; adding 100 kg of a polyurethane wet resin, stirring uniformly, defoaming and coating the obtained mixture on the textile fabric fiber; immersing in a water solution of 18-22% dimethyl formamide to make the mixture solidified, squeezing water, washing with water and drying to obtain a wet base; mixing 100 kg of a yangbuck resin, 10-20 kg of toluene, 0.5-1.0 part of an auxiliary agent and 3-5 kg of a toner uniformly and coating the obtained mixture on release paper to obtain a dry veneer; adhering the wet base to the dry veneer, drying, separating from the release paper, foaming the yangbuck material; embossing and cooling. The obtained product has soft hand feeling; soft and delicate surface velvet feeling, and is exactly like the frosted genuine leather.
Description
Technical field
The present invention relates to a kind of artificial leather preparation method, particularly a kind of frosted imitation genuine leather preparation method.
Background technology
Usually use the artificial leather material in the clothes, because clothes are when wearing, the fold friction phenomenon appears in artificial leather repeatedly, often cause artificial leather to produce fractureing, crack phenomenon, especially in temperature low season and area, the hydrolysis phenomenon also occurs in the easier appearance fracture of artificial leather and crack phenomenon easily when artificial leather is stained with alkaline matter, cause clothes to damage, scrap, the time of wearing is short.
Summary of the invention
In order to overcome defects, the invention provides a kind of frosted imitation genuine leather preparation method, this frosted imitation genuine leather preparation method technique is simple, and soft, the surperficial velvet of the product of producing is fine and smooth, exactly likes frosted corium.
The present invention for the technical scheme that solves its technical problem and adopt is: a kind of frosted imitation genuine leather preparation method, and concrete steps are as follows:
Step 1: wet-mixing batching:
A. with 5～10kg dimethyl formamide and 0.5～2kg mill base high-speed stirred 80～100 minutes, then filter stand-by;
B. with 100～120kg dimethyl formamide and 20～30kg wood powder mix and blend 20～30 minutes, then abundant swelling 30～40 minutes then adds and filters good mixture among the step a and stir stand-by;
C. 100kg polyurethane wet method resin is joined in the mixture that step b forms, stirred 30～40 minutes, deaeration 40～50 minutes;
Step 2: the wet method bass is produced:
With in the step 1 the slurry that forms of deaeration be coated with and scrape on the woven fabric fiber, immerse again mass percentage concentration and be in 18～22% the dimethyl formamide aqueous solution and solidify, then through at least one squezzing operation, wash again with drying after obtain a kind of wet method bass;
Step 3: dry mixed batching:
High-speed stirred after 100kg sheep bar resin, 10～20kg toluene, 0.5～1.0kg auxiliary agent and 3～5kg toner mixed, mixing time 10～15 minutes is to stirring;
Step 4: dry method veneer:
The dry method slurry for preparing in the step 3 is coated with to scrape on the release liners with the flower type, forms the dry method veneer, then be to be adhered on the dry method veneer under 80～90 ℃ the condition in temperature with the wet method bass in the step 2 by adhesive, separate through 110～130 ℃ dry heel release liners;
Step 5: embossing:
First the product after the separation in the step 4 is heated to 170～180 ℃ and makes the uniformly foaming of sheep bar material, then by knurling rolls the product after heating is carried out embossing, make it form embossing on dry method overlay coating surface, then cooling and shaping obtains a kind of frosted imitation genuine leather.
As a further improvement on the present invention, dimethyl formamide and mill base high-speed stirred 90 minutes among the described step a.
As a further improvement on the present invention, use 240 order nylon wires that the mixed liquor of dimethyl formamide and mill base is filtered among the described step a;
B. with 100～120kg dimethyl formamide and 20～30kg wood powder mix and blend 30 minutes, then abundant swelling 35 minutes then adds and filters good mixture among the step a and stir stand-by;
C. 100kg polyurethane wet method resin is joined in the mixture that step b forms, stirred 40 minutes, deaeration 45 minutes.
As a further improvement on the present invention, step 3: dry mixed batching:
High-speed stirred 15 minutes was to stirring after 100kg sheep bar resin, 15～20kg toluene, 0.5～1.0kg auxiliary agent and 3～5kg toner mixed.
As a further improvement on the present invention, used knurling rolls are that a kind of in the nickel roller of colored type and the silica gel knurling rolls arranged in the described step 5.
As a further improvement on the present invention, cooling means is for to cool off product in the described step 5 by cooling cylinder, and logical 3～5 ℃ chilled water cools off in the cooling cylinder.
The invention has the beneficial effects as follows: the present invention forms the dry method overlay coating and carries out the embossing processing in the dry method overlay coating outside by being coated with to scrape after using sheep to cling to resin, toluene, auxiliary agent and toner mixing, so that soft, the surperficial velvet of product is fine and smooth, exactly like frosted corium.
The specific embodiment
Embodiment: a kind of frosted imitation genuine leather preparation method, concrete steps are as follows:
Step 1: wet-mixing batching:
A. with 5～10kg dimethyl formamide and 0.5～2kg mill base high-speed stirred 80～100 minutes, then filter stand-by;
B. with 100～120kg dimethyl formamide and 20～30kg wood powder mix and blend 20～30 minutes, then abundant swelling 30～40 minutes then adds and filters good mixture among the step a and stir stand-by;
C. 100kg polyurethane wet method resin is joined in the mixture that step b forms, stirred 30～40 minutes, deaeration 40～50 minutes;
Step 2: the wet method bass is produced:
With in the step 1 the slurry that forms of deaeration be coated with and scrape on the woven fabric fiber, immerse again mass percentage concentration and be in 18～22% the dimethyl formamide aqueous solution and solidify, then through at least one squezzing operation, wash again with drying after obtain a kind of wet method bass;
Step 3: dry mixed batching:
High-speed stirred after 100kg sheep bar resin, 10～20kg toluene, 0.5～1.0kg auxiliary agent and 3～5kg toner mixed, mixing time 10～15 minutes is to stirring;
Step 4: dry method veneer:
The dry method slurry for preparing in the step 3 is coated with to scrape on the release liners with the flower type, forms the dry method veneer, then be to be adhered on the dry method veneer under 80～90 ℃ the condition in temperature with the wet method bass in the step 2 by adhesive, separate through 110～130 ℃ dry heel release liners;
Step 5: embossing:
First the product after the separation in the step 4 is heated to 170～180 ℃ and makes the uniformly foaming of sheep bar material, then by knurling rolls the product after heating is carried out embossing, make it form embossing on dry method overlay coating surface, then cooling and shaping obtains a kind of frosted imitation genuine leather.
Dimethyl formamide and mill base high-speed stirred are 90 minutes among the described step a.
Use 240 order nylon wires that the mixed liquor of dimethyl formamide and mill base is filtered among the described step a;
B. with 100～120kg dimethyl formamide and 20～30kg wood powder mix and blend 30 minutes, then abundant swelling 35 minutes then adds and filters good mixture among the step a and stir stand-by;
C. 100kg polyurethane wet method resin is joined in the mixture that step b forms, stirred 40 minutes, deaeration 45 minutes.
Described step 3: dry mixed batching:
High-speed stirred 15 minutes was to stirring after 100kg sheep bar resin, 15～20kg toluene, 0.5～1.0kg auxiliary agent and 3～5kg toner mixed.
Used knurling rolls are that a kind of in the nickel roller of colored type and the silica gel knurling rolls arranged in the described step 5.
Cooling means is for to cool off product in the described step 5 by cooling cylinder, and logical 3～5 ℃ chilled water cools off in the cooling cylinder.
Claims (6)
1. frosted imitation genuine leather preparation method, it is characterized in that: concrete steps are as follows:
Step 1: wet-mixing batching:
A. with 5～10kg dimethyl formamide and 0.5～2kg mill base high-speed stirred 80～100 minutes, then filter stand-by;
B. with 100～120kg dimethyl formamide and 20～30kg wood powder mix and blend 20～30 minutes, then abundant swelling 30～40 minutes then adds and filters good mixture among the step a and stir stand-by;
C. 100kg polyurethane wet method resin is joined in the mixture that step b forms, stirred 30～40 minutes, deaeration 40～50 minutes;
Step 2: the wet method bass is produced:
With in the step 1 the slurry that forms of deaeration be coated with and scrape on the woven fabric fiber, immerse again mass percentage concentration and be in 18～22% the dimethyl formamide aqueous solution and solidify, then through at least one squezzing operation, wash again with drying after obtain a kind of wet method bass;
Step 3: dry mixed batching:
High-speed stirred after 100kg sheep bar resin, 10～20kg toluene, 0.5～1.0kg auxiliary agent and 3～5kg toner mixed, mixing time 10～15 minutes is to stirring;
Step 4: dry method veneer:
The dry method slurry for preparing in the step 3 is coated with to scrape on the release liners with the flower type, forms the dry method veneer, then be to be adhered on the dry method veneer under 80～90 ℃ the condition in temperature with the wet method bass in the step 2 by adhesive, separate through 110～130 ℃ dry heel release liners;
Step 5: embossing:
First the product after the separation in the step 4 is heated to 170～180 ℃ and makes the uniformly foaming of sheep bar material, then by knurling rolls the product after heating is carried out embossing, make it form embossing on dry method overlay coating surface, then cooling and shaping obtains a kind of frosted imitation genuine leather.
2. frosted imitation genuine leather preparation method according to claim 1, it is characterized in that: dimethyl formamide and mill base high-speed stirred are 90 minutes among the described step a.
3. frosted imitation genuine leather preparation method according to claim 1 is characterized in that: use 240 order nylon wires that the mixed liquor of dimethyl formamide and mill base is filtered among the described step a;
B. with 100～120kg dimethyl formamide and 20～30kg wood powder mix and blend 30 minutes, then abundant swelling 35 minutes then adds and filters good mixture among the step a and stir stand-by;
C. 100kg polyurethane wet method resin is joined in the mixture that step b forms, stirred 40 minutes, deaeration 45 minutes.
4. frosted imitation genuine leather preparation method according to claim 1 is characterized in that: step 3: the dry mixed batching:
High-speed stirred 15 minutes was to stirring after 100kg sheep bar resin, 15～20kg toluene, 0.5～1.0kg auxiliary agent and 3～5kg toner mixed.
5. frosted imitation genuine leather preparation method according to claim 1 is characterized in that: used knurling rolls are that a kind of in the nickel roller of colored type and the silica gel knurling rolls arranged in the described step 5.
6. frosted imitation genuine leather preparation method according to claim 1 is characterized in that: cooling means is for to cool off product in the described step 5 by cooling cylinder, and logical 3～5 ℃ chilled water cools off in the cooling cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215737.1A CN102899912B (en) | 2011-07-29 | 2011-07-29 | Manufacturing method for simulation leather of frosted genuine leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215737.1A CN102899912B (en) | 2011-07-29 | 2011-07-29 | Manufacturing method for simulation leather of frosted genuine leather |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102899912A true CN102899912A (en) | 2013-01-30 |
| CN102899912B CN102899912B (en) | 2014-08-20 |
Family
ID=47572381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110215737.1A Expired - Fee Related CN102899912B (en) | 2011-07-29 | 2011-07-29 | Manufacturing method for simulation leather of frosted genuine leather |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102899912B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147312A (en) * | 2013-03-04 | 2013-06-12 | 浙江科一合成革有限公司 | PU (Polyurethane) synthetic leather and preparation method thereof |
| CN104141236A (en) * | 2013-05-10 | 2014-11-12 | 昆山协孚人造皮有限公司 | Creased embossed leather production method |
| CN104141242A (en) * | 2013-05-10 | 2014-11-12 | 昆山协孚人造皮有限公司 | Production method for carbon black clothing leather |
| CN105332288A (en) * | 2015-10-28 | 2016-02-17 | 温州永达利合成革有限公司 | Shoe leather preparing technology and formula thereof |
| CN106436337A (en) * | 2016-09-28 | 2017-02-22 | 合肥科天水性科技有限责任公司 | Water-based yangbuck with lustring effects and method for preparing water-based yangbuck |
| CN107384212A (en) * | 2017-08-18 | 2017-11-24 | 江苏宝泽高分子材料股份有限公司 | Thick sheep bar pressure changing resin and preparation method thereof in a kind of use for synthetic leather |
| CN110629562A (en) * | 2019-11-01 | 2019-12-31 | 清远市齐力合成革有限公司 | Synthetic leather fabric for stage shoes and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545212A (en) * | 2009-04-30 | 2009-09-30 | 江苏东泰聚合材料有限公司 | Hydrolysis resistance chemical leather and manufacturing method thereof |
| CN101705622A (en) * | 2009-11-12 | 2010-05-12 | 江苏宝泽高分子材料股份有限公司 | Water-based PU Nubuck high-temperature foamex for synthetic leather |
| CN101748613A (en) * | 2009-12-18 | 2010-06-23 | 安徽安利合成革股份有限公司 | Method for producing real leather intimating polyurethane synthetic leather |
| CN101886341A (en) * | 2010-06-30 | 2010-11-17 | 安徽安利合成革股份有限公司 | Method for producing buffed velvet skin-imitated polyurethane synthetic leather |
-
2011
- 2011-07-29 CN CN201110215737.1A patent/CN102899912B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545212A (en) * | 2009-04-30 | 2009-09-30 | 江苏东泰聚合材料有限公司 | Hydrolysis resistance chemical leather and manufacturing method thereof |
| CN101705622A (en) * | 2009-11-12 | 2010-05-12 | 江苏宝泽高分子材料股份有限公司 | Water-based PU Nubuck high-temperature foamex for synthetic leather |
| CN101748613A (en) * | 2009-12-18 | 2010-06-23 | 安徽安利合成革股份有限公司 | Method for producing real leather intimating polyurethane synthetic leather |
| CN101886341A (en) * | 2010-06-30 | 2010-11-17 | 安徽安利合成革股份有限公司 | Method for producing buffed velvet skin-imitated polyurethane synthetic leather |
Non-Patent Citations (1)
| Title |
|---|
| 曲建波等: "《合成革工艺学》", 31 May 2010, article "合成革工艺学", pages: 277-284 - 286-289 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147312A (en) * | 2013-03-04 | 2013-06-12 | 浙江科一合成革有限公司 | PU (Polyurethane) synthetic leather and preparation method thereof |
| CN103147312B (en) * | 2013-03-04 | 2015-04-29 | 浙江元新实业有限公司 | PU (Polyurethane) synthetic leather and preparation method thereof |
| CN104141236A (en) * | 2013-05-10 | 2014-11-12 | 昆山协孚人造皮有限公司 | Creased embossed leather production method |
| CN104141242A (en) * | 2013-05-10 | 2014-11-12 | 昆山协孚人造皮有限公司 | Production method for carbon black clothing leather |
| CN105332288A (en) * | 2015-10-28 | 2016-02-17 | 温州永达利合成革有限公司 | Shoe leather preparing technology and formula thereof |
| CN106436337A (en) * | 2016-09-28 | 2017-02-22 | 合肥科天水性科技有限责任公司 | Water-based yangbuck with lustring effects and method for preparing water-based yangbuck |
| CN106436337B (en) * | 2016-09-28 | 2019-07-16 | 合肥科天水性科技有限责任公司 | A kind of aqueous sheep Ba Ge and preparation method thereof with hot light effect |
| CN107384212A (en) * | 2017-08-18 | 2017-11-24 | 江苏宝泽高分子材料股份有限公司 | Thick sheep bar pressure changing resin and preparation method thereof in a kind of use for synthetic leather |
| CN110629562A (en) * | 2019-11-01 | 2019-12-31 | 清远市齐力合成革有限公司 | Synthetic leather fabric for stage shoes and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102899912B (en) | 2014-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102899912B (en) | Manufacturing method for simulation leather of frosted genuine leather | |
| CN102899910B (en) | Manufacturing method of highlight leather | |
| CN103507379A (en) | Preparation method of double-sided leather | |
| CN102864650B (en) | Manufacturing method of bicolor synthetic leather | |
| CN103031744B (en) | Manufacture method of half microfiber sports shoe leather | |
| CN102899916B (en) | Manufacturing method for hydrolysis-resistant clothing leather | |
| CN104141236A (en) | Creased embossed leather production method | |
| CN103031737B (en) | Production method of hydrolysis resistance regenerating resin synthetic leather | |
| CN106592263A (en) | Preparation method for artificial leather | |
| CN102899921B (en) | Manufacturing method of powder-wax synthetic leather | |
| CN104562729A (en) | Water-based spray leather as well as production method thereof | |
| CN102899911B (en) | Manufacturing method of skin-simulated coke-feeling leather | |
| CN103031738B (en) | Method for manufacturing netted sandwich cloth synthetic leather | |
| CN103572614A (en) | Preparation method of handball leather | |
| CN105131194A (en) | Manmade beef bone button and preparing method thereof | |
| CN102899915A (en) | Manufacturing method of environment-friendly synthetic leather | |
| CN103031740A (en) | High-flame-retardant sofa leather production method | |
| CN103510396B (en) | Method for preparing high solid content high-brightness leather | |
| CN104141242A (en) | Production method for carbon black clothing leather | |
| CN111424438A (en) | Production process of collagen fiber leather for clothing | |
| CN103510389B (en) | Spray coking wax feeling leather production method | |
| CN103510388B (en) | Manufacturing method for vintage washable leather | |
| CN104141241A (en) | Production method for waterborne polyurethane scalded-polished leather | |
| CN106283699B (en) | Superfine fiber chemical leather surface embossed method | |
| CN103510395B (en) | Making method of ironing discoloration type synthetic leather |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Suzhou City, Jiangsu province 215300 Yushan town Kunshan City Yuhe Road No. 111 Patentee after: KUNSHAN XIEFU NEW MATERIALS LIMITED BY SHARE LTD. Address before: Suzhou City, Jiangsu province 215300 Yushan town Kunshan City Yuhe Road No. 111 Patentee before: Kunshan Xiefu Artificial Leather Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |