CN112359462B - Production method of TPU yarn interweaving back glue-free composite wall cloth fabric - Google Patents
Production method of TPU yarn interweaving back glue-free composite wall cloth fabric Download PDFInfo
- Publication number
- CN112359462B CN112359462B CN202010959270.0A CN202010959270A CN112359462B CN 112359462 B CN112359462 B CN 112359462B CN 202010959270 A CN202010959270 A CN 202010959270A CN 112359462 B CN112359462 B CN 112359462B
- Authority
- CN
- China
- Prior art keywords
- cloth
- tpu
- temperature
- weft
- layer
- 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.)
- Active
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D11/00—Double or multi-ply fabrics not otherwise provided for
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D21/00—Lappet- or swivel-woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
Abstract
The invention relates to the technical field of production and preparation of wall cloth fabrics, in particular to a production method of a TPU yarn interwoven back glue-free composite wall cloth fabric, which comprises the following steps: the production method comprises the steps of yarn selection, weaving on a machine, first-step low-temperature setting treatment of grey cloth, second-step high-temperature press polishing treatment of the grey cloth, and third-step low-temperature tentering setting treatment, and the TPU thermal fuse is used for replacing a back adhesive compound production flow, so that the environmental pollution is reduced, and the product has good cloth surface flatness and good bonding effect. Meanwhile, the adhesive can be applied to the surface of a small-area packaging ornament, can be directly pressed and ironed at high temperature without being adhered and formed by glue, and is convenient and environment-friendly.
Description
Technical Field
The invention relates to the technical field of production and preparation of wall cloth fabrics, in particular to a production method of a TPU yarn interwoven back glue-free composite wall cloth fabric.
Background
The existing manufacturing method of the finished wall cloth is divided into a back glue or composite mode to achieve the effect of leveling and no slurry leakage. Meanwhile, the wall is mounted in a way of gluing water on the back surface. In the coating and compounding process, the problems of waste gas, waste water pollution and the like in the aspect of environmental protection exist, and the use of the glue can also cause pollution to the indoor environment; and the glue is easy to age and fall off.
Research shows that the molecular structure of TPU consists of rigid block obtained through the reaction of MDI or TDI and chain extender and flexible chain segment obtained through the reaction of diisocyanate molecules such as MDI or TDI and the like and macromolecular polyol alternately. Has the characteristics of excellent high tension, toughness and aging resistance, and belongs to a mature environment-friendly material. Compared with other plastic materials, the TPU has higher strength and better toughness, and is different from other plastic materials under the excellent functional performances of wear resistance, high temperature resistance, cold resistance, oil resistance, hydrolysis resistance, aging resistance, UV resistance, high waterproof and moisture permeability, wind resistance, cold resistance, antibiosis, mildew resistance, heat preservation and the like.
At present, a related technical scheme that TPU is made into yarns and is matched with base cloth yarns in a weaving mode to weave wall cloth is not disclosed, so that the invention provides a production method of wall cloth fabric which is interwoven by adopting TPU yarns and is free from back glue compounding.
Disclosure of Invention
The invention aims to provide a production method of a TPU yarn interwoven back glue-free composite wall cloth fabric, the whole production process is pollution-free, environment-friendly production is realized, the prepared wall cloth fabric has good elasticity and crease resistance, the cloth surface is smooth, and the wall cloth fabric can be directly pasted without a coating and glue by heating.
In order to achieve the purpose, the invention provides the following technical scheme: a production method of a TPU yarn interweaving back glue-free composite wall cloth fabric comprises the following steps:
s1: selecting yarns: selecting interlaced yarns as warp yarns, adopting common yarns as surface weft yarns, and adopting TPU (thermoplastic polyurethane) thermal fuses as bottom weft yarns;
s2: weaving on a loom: weaving on a loom by using a high-warp-density rapier jacquard, wherein the weft density on the loom is 36-46 pieces/cm, the arrangement ratio of weft yarns of the surface layer and the bottom layer is 1:1, the surface layer adopts various weft yarns to be interwoven into required jacquard patterns, and the weft yarns of the bottom layer adopt TPU and warp yarns to be interwoven into flat bottom base cloth; the surface layer weft yarns and the bottom layer weft yarns are interwoven through corresponding tissues matched with the warp yarns, and the upper warp density is 96-110 pieces/cm; weaving a two-layer structure consisting of a common surface yarn weft base fabric layer and a bottom TPU thermal fuse weft layer according to the weaving process, wherein the lower machine width is 285-290cm gray fabric;
s3: the first step of low-temperature setting treatment of grey cloth: shaping by using a low-temperature shaping machine to enable the cloth surface of the grey cloth to be smooth and meet the cloth width requirement of 300 plus 305cm, and simultaneously restrain the cloth surface shrinkage caused by the large elasticity of TPU (thermoplastic polyurethane) yarns;
s4: the second step of high-temperature press polishing treatment of the grey cloth: performing high-temperature calendaring solidification treatment on the cloth treated by the S3 by using a calendaring machine to melt the TPU black silk weft yarn layer at the bottom layer and form a TPU film under the action of high temperature and high pressure, so that the cloth meets the waterproof and leakproof effects of the wall cloth;
s5: a third step of low-temperature stentering and setting treatment of the grey cloth: and (3) carrying out low-temperature tentering setting treatment on the cloth treated by the S4 by using a setting machine, ensuring that the cloth is tentered and set to a width of 290 + 300cm without damaging the waterproof and leakage-proof effects of the TPU film, and ensuring that the cloth pattern is full.
Further, in step S1, the warp yarn is 100D interlaced yarn, the surface layer weft yarn is 10 large chemical fibers, and the bottom layer weft yarn is 300D/36F TPU thermal fuse.
Further, the jacquard is a 5120-needle jacquard, wherein the cloth body is a 5040-needle 6-needle jacquard, and the weaving width of the machine body is 318 cm.
Furthermore, when the jacquard machine in the step S2 weaves, the tension of the bottom TPU yarn weft yarns is adjusted to be minimum, and the side supports are reinforced, so that the weaving shrinkage is reduced, the production efficiency is improved, and the TPU film can achieve the waterproof and leak-proof effects; the tension of the warp and weft yarns on the surface layer is greater than that of the bottom layer, so that the cloth cover patterns are full.
Further, the melting temperature of the TPU filament is 138-142 ℃.
Further, the low temperature setting process in step S3 is performed at a temperature of 95-100 ℃, a width of 300-305cm and a speed of 15-20 m/min.
Further, the high-temperature calendering treatment in the step S4 is carried out at the temperature of 160-165 ℃, the speed of 10-15m/min and the pressure of 196-200 KN.
Further, the high temperature calendering process described herein is one in which the TPU faces the cylinder and is cushioned to prevent sticking to the calender cylinder.
Further, the low temperature tentering and setting process in step S5 is performed at a temperature of 100 ℃ and 110 ℃, a width of 300 ℃ and 305cm, and a speed of 10-15 m/min.
Compared with the prior art, the invention has the advantages that: adopt the lower TPU hot melt yarn of melting point to be used as the former material yarn of weaving wall cloth, through TPU hot melt yarn high temperature melting press polish film forming, the TPU membrane can realize waterproof leak protection, but the bonding of direct heating wall mounting, directly when especially to the packing ornaments of small area through high temperature press boiling hot alright bonding take shape, have the environmental protection practicality, characteristics such as easy restoration. The use of TPU yarn reduces the environmental pollution of the composite production flow, and the product has good cloth surface evenness and fuller cloth surface pattern. The upper and lower layers of the wall cloth are interwoven through yarns, and compared with a simple back glue, the composite conventional wall cloth has better bonding fastness and longer service life.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural view of a back glue-free composite wall cloth fabric according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a TPU film formed by dissolving a TPU thermal fuse weft yarn layer at the bottom layer of the back glue-free composite wall cloth fabric according to the embodiment of the invention.
In the drawings:
1. 10 large chemical fiber weft yarns on the surface layer; 2. 100D/48F polyester interlaced yarn warp yarns; 3. bottom layer 300D/36F TPU thermal fuse weft yarns.
Detailed Description
Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
With the attached drawings, the invention provides a technical scheme that: a production method of a TPU yarn interweaving back glue-free composite wall cloth fabric is adopted, the back glue-free composite wall cloth fabric comprises a surface layer common yarn weft yarn base fabric layer and a bottom layer TPU thermal fuse weft yarn layer, and the upper layer weft yarn and the lower layer weft yarn form a two-layer weaving structure through warp interweaving; after the back glue-free composite wall cloth fabric is subjected to high-temperature hot melting and shaping treatment, a bottom TPU (thermoplastic polyurethane) hot melt silk layer is dissolved, and the waterproof and leakproof wall surface requirements are met through press polishing and film forming;
the back glue-free composite wall cloth fabric is produced by the following steps: selecting S1 yarns, weaving on an S2 loom, carrying out first-step low-temperature setting treatment on an S3 grey fabric, carrying out second-step high-temperature calendering treatment on an S4 grey fabric, and carrying out third-step low-temperature tentering setting treatment on an S5 grey fabric.
In step S1, 100D/48F polyester interlaced yarn warp yarn 2 is selected, 10 large chemical fiber weft yarns 1 on the surface layer and 300D/36F TPU thermal fuse weft yarn 3 on the bottom layer are selected.
100D/48F polyester yarns and 10 large chemical fibers are common yarn materials and are prepared fully, and it is worth noting that 300D/36F TPU yarns are the key point of the invention and are also the key point for realizing the waterproof and leakproof wall cloth, the melting temperature of the yarns is 140 ℃, and the yarns are subjected to multiple tests by related manufacturers and are produced in small batches. And achieves the waterproof and leak-proof effects.
In step S2, a 5120-needle jacquard machine is adopted, wherein a cloth body is a 5040-needle jacquard machine with 6 flowers, the upper machine width is 318cm, during weaving, surface layer weft yarns adopt large chemical fibers, bottom layer weft yarns adopt TPU (thermoplastic polyurethane) yarns, the upper machine weft density is 42 weft yarns/cm, and the arrangement ratio of the surface layer weft yarns to the bottom layer weft yarns is 1: 1. As shown in figure 1, the two-layer structure is composed of a surface layer common yarn weft base fabric layer and a bottom layer TPU thermal fuse weft layer.
The tension of the bottom TPU silk weft yarns is adjusted to be minimum, the side shores are reinforced, so that the weaving shrinkage is reduced, and the TPU film is completely full and seamless during forming and is waterproof and leakproof; the tension of the warp and weft yarns of the surface layer is greater than that of the bottom layer, so that the patterns of the cloth surface are full, and the grey cloth with the lower machine width of 285cm is woven according to the weaving process.
In step S3, the grey cloth is subjected to low-temperature setting treatment in the first step, the weft inclination of the cloth cover is reduced by using a weft straightening device for setting treatment, and the low-temperature setting machine is used for setting treatment at the temperature of 95-100 ℃, wherein the processing speed is 15-20m/min, so that the cloth cover of the grey cloth is smooth and meets the requirement of a reasonable 300cm cloth width, and meanwhile, the cloth cover shrinkage caused by the large elasticity of TPU (thermoplastic polyurethane) yarns is inhibited.
In step S4, performing a second high-temperature calendering treatment on the grey cloth, performing high-temperature calendering and curing treatment on the cloth after the treatment of S3 by using a calender under the conditions that the temperature is 160-.
And in the step S5, performing low-temperature tentering and setting treatment on the grey cloth in the third step, and performing low-temperature setting treatment on the cloth treated in the step S4 by using a setting machine to ensure that the cloth is tentered and set to a width of 290 + 295CM without damaging the waterproof and leakproof effects and the cloth pattern is plump. As shown in figure 2, the bottom TPU thermal fuse weft layer is dissolved and formed into a TPU film 4, and the TPU film is covered on the bottom of the common yarn weft base fabric layer of the surface layer to prevent water and leakage.
The weft straightening device is an integrally-manufactured inserted bar which is arranged in the process of a cloth moving procedure and is linearly distributed, and the integrally-manufactured inserted bar is vertical to a cloth plane.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A production method of a TPU yarn interweaving back glue-free composite wall cloth fabric is characterized by comprising the following steps:
s1: selecting yarns: selecting 100D interlaced yarn as warp yarn, adopting 10 large chemical fibers as surface weft yarn, and adopting 300D/36FTPU thermal fuse as bottom weft yarn;
s2: weaving on a loom: weaving on a machine by adopting a high-warp-density rapier jacquard, wherein the weft density of the machine is 36-46 pieces/cm, the arrangement ratio of weft yarns of the surface layer to the bottom layer is 1:1, the surface layer adopts various weft yarns and warp yarns to be interwoven into required jacquard patterns, and the weft yarns of the bottom layer adopt TPU thermal fuses to be interwoven with the warp yarns into flat bottom base cloth; the surface layer weft yarns and the bottom layer weft yarns are interwoven through corresponding tissues matched with the warp yarns, and the upper warp density is 96-110 pieces/cm; weaving a two-layer structure consisting of a surface weft base fabric layer and a bottom TPU thermal fuse weft layer according to the weaving process, wherein the lower machine width is 285-290cm gray fabric; when the high-warp-density rapier jacquard is used for weaving, the tension of the bottom TPU thermal fuse weft yarns is adjusted to be minimum, and the side supports are reinforced, so that the weaving shrinkage amplitude is reduced, the production efficiency is improved, and the TPU film can achieve the waterproof and leakproof effects; the tension of the surface weft yarn is greater than that of the bottom layer, so that the cloth cover patterns are full;
s3: the first step of low-temperature shaping treatment of grey cloth: shaping by using a low-temperature shaping machine at the temperature of 95-100 ℃ and the speed of 15-20m/min to ensure that the cloth surface of the grey cloth is smooth and meets the cloth width requirement of 300-;
s4: the second step of high-temperature press polishing treatment of the grey cloth: performing high-temperature calendaring and curing treatment on the cloth treated by S3 by using a calendaring machine, wherein the temperature is 160-165 ℃, the speed is 10-15m/min, and the pressure is 196-200KN, so that the bottom TPU thermal fuse weft layer is melted, and a TPU film is formed under the action of high temperature and high pressure, so that the cloth meets the waterproof and leakproof effects of the wall cloth; the width of the grey cloth is contracted to 290-;
s5: a third step of low-temperature stentering and setting treatment of the grey cloth: and (3) carrying out low-temperature tentering setting treatment on the cloth treated by the S4 by using a setting machine, wherein the temperature is 100-110 ℃, and the speed is 10-15m/min, so that the cloth is tentered and set to a width of 300cm without damaging the waterproof and leakage-proof effects of the TPU film, and the cloth pattern is plump.
2. The method for producing the TPU yarn interwoven back glue-free composite wall cloth fabric according to claim 1, is characterized in that: the melting temperature of the TPU thermal fuse is 138-142 ℃.
3. The method for producing the TPU yarn interwoven back glue-free composite wall cloth fabric according to claim 1, is characterized in that: in the step S4, during the high temperature calendering process, the bottom layer TPU hot melt weft layer faces the roller and is padded with grease-proof paper to prevent sticking to the calender roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010959270.0A CN112359462B (en) | 2020-09-14 | 2020-09-14 | Production method of TPU yarn interweaving back glue-free composite wall cloth fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010959270.0A CN112359462B (en) | 2020-09-14 | 2020-09-14 | Production method of TPU yarn interweaving back glue-free composite wall cloth fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112359462A CN112359462A (en) | 2021-02-12 |
| CN112359462B true CN112359462B (en) | 2022-07-05 |
Family
ID=74516548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010959270.0A Active CN112359462B (en) | 2020-09-14 | 2020-09-14 | Production method of TPU yarn interweaving back glue-free composite wall cloth fabric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112359462B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517753A (en) * | 2011-12-20 | 2012-06-27 | 浙江三志纺织有限公司 | Jacquard black-out cloth and production method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2568275B1 (en) * | 1984-07-27 | 1986-09-05 | Chomarat & Cie | TEXTILE REINFORCEMENT BASED ON GLASS YARNS USEFUL FOR THE PRODUCTION OF LAMINATED COMPLEXES |
| DE4303667C1 (en) * | 1992-12-12 | 1994-06-09 | Parabeam Ind & Handels Bv | Double pile fabric - incorporates thermoplastic fibres at bonding intersections to allow material to be separated into strips without edge fraying |
| TW200716822A (en) * | 2006-11-29 | 2007-05-01 | Hun Kun Entpr Co Ltd | Manufacturing method of polyolefin waterproof fabric |
| CN101407960B (en) * | 2008-11-18 | 2010-12-29 | 山合林（北京）水土保持技术有限公司 | Ramie / terylene double fabric for textile wall cloth and curtain cloth and preparing method thereof |
| CN105350159B (en) * | 2015-11-09 | 2017-04-05 | 吴江市鼎盛丝绸有限公司 | A kind of silk jacquard weave Song Dynasty brocade fabric with itself adhesive function |
| CN105220334A (en) * | 2015-11-13 | 2016-01-06 | 浙江港龙织造科技有限公司 | Self-adhesion mould assembly knitted fabric and processing method thereof |
| CN107227543A (en) * | 2017-08-04 | 2017-10-03 | 苏州华良化纤纺织有限公司 | A kind of low melting point terylene composite material |
| CN108866751A (en) * | 2018-10-09 | 2018-11-23 | 浙江辰鸿纺织品科技股份有限公司 | Autoadhesion fabric for roller shutter without resin binder and preparation method thereof |
-
2020
- 2020-09-14 CN CN202010959270.0A patent/CN112359462B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517753A (en) * | 2011-12-20 | 2012-06-27 | 浙江三志纺织有限公司 | Jacquard black-out cloth and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112359462A (en) | 2021-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102138709B (en) | Method for preparing maize biology-based special-leather-feel top grade leisure shell fabric | |
| CN103741417A (en) | Preparation method of high-imitation cotton printed fabric | |
| CN1651644A (en) | High strength ultrafine fiber simulation composite lether and its manufacturing method | |
| CN105442152B (en) | Woven fabric having the appearance of a wetcloth fabric and method for producing the same | |
| CN101457482A (en) | Superfine fibre woven fibric chemical leather and method for producing the same | |
| CN110924184A (en) | Preparation method of weft-knitted suede super-imitation leather fabric | |
| CN103126140A (en) | Production process of cashmere lining cloth | |
| CN103361854A (en) | Elastic textile and manufacturing method thereof | |
| CN114987010A (en) | High-moisture-permeability bio-based nylon fabric and preparation method thereof | |
| CN108914612A (en) | A kind of processing method of warp knitting ultra-soft grid knitted polyester fabric | |
| CN112359462B (en) | Production method of TPU yarn interweaving back glue-free composite wall cloth fabric | |
| CN206446225U (en) | A kind of good cotton velvet fabric of elasticity | |
| CN112267192B (en) | Production method of full-shading curtain cloth by weaving middle layer with TPU (thermoplastic polyurethane) yarns | |
| CN112301497B (en) | Method for producing warp and weft non-interwoven through-hole gauze | |
| CN108505188B (en) | Preparation method of three-layer heterotopic-structure down-penetration-preventing elastic down fabric | |
| CN113043700B (en) | Waterproof moisture-permeable vamp and preparation method thereof | |
| CN114481402A (en) | Production process of antistatic waterproof woven fabric | |
| CN210116249U (en) | Washed and faded jean fabric | |
| CN108442020A (en) | A kind of preparation method of anti-chiseling down elasticity eiderdown shell fabric fabric | |
| CN107663768A (en) | A kind of tabby dyeing and finishing processing method | |
| KR100743988B1 (en) | Method Of Fabricating Synthetic Suede | |
| CN103388264B (en) | Caravan tent fabric and production method thereof | |
| CN110629363A (en) | Memory type high-grade elastic knitted fabric and preparation method thereof | |
| CN219988656U (en) | Environment-friendly textile fabric structure | |
| KR102130552B1 (en) | Method for manufacturing artificial leather using a bonding substrate with a reuseable backing cloths |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Fang Baisong Inventor after: Feng Junyou Inventor after: Jiang Guoqiang Inventor after: Cheng Yu Inventor before: Fang Baisong Inventor before: Feng Junyou Inventor before: Jiang Guoqiang Inventor before: Cheng Yu |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |