CN108823810A - A kind of non-woven cloth forming technique that spun-bonded spunlace technique combines - Google Patents
A kind of non-woven cloth forming technique that spun-bonded spunlace technique combines Download PDFInfo
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- CN108823810A CN108823810A CN201810596387.XA CN201810596387A CN108823810A CN 108823810 A CN108823810 A CN 108823810A CN 201810596387 A CN201810596387 A CN 201810596387A CN 108823810 A CN108823810 A CN 108823810A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000004744 fabric Substances 0.000 title claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 45
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000009987 spinning Methods 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000004743 Polypropylene Substances 0.000 claims description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 11
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 8
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 8
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000007787 solid Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
- D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention proposes the non-woven cloth forming techniques that a kind of spun-bonded spunlace technique combines, and include the following steps：Raw material a, raw material b pass through extruder progress extrusion molten respectively and obtain melt a, melt b；Then impurity is removed online through filter, subsequently into spinning system；Cooling to be consolidated into silk after the ejection of spinning machine spinneret, tow imports draft nozzle and draws by air-flow, and lapping respectively obtains web A, web B on lapper；Web A, web B are reinforced in line overlap feeding spun lacing area, obtain non-woven fabrics；It is input in baking oven after non-woven fabrics progress hydrophilic treated and carries out drying, rolled machine-cut side, coiled, packaging factory.Using first spunbond lapping again spun lacing reinforcement process carry out non-woven fabrics production, can make non-woven fabrics have fluffy sense, solid sense, increase the strength of non-woven fabrics, can substitute hot wind cloth reduce production cost.
Description
【Technical field】
The present invention relates to the technical field of nonwoven production, non-woven cloth that especially a kind of spun-bonded spunlace technique combines at
Type technology.
【Background technique】
Non-woven fabrics, that is, non-woven cloth, it be directly using high polymer slice, staple fiber or long filament by fiber by air-flow or
Then mechanical networking is reinforced, the non-woven cloth finally formed by final finishing by spun lacing, needle thorn or hot rolling.Spunbond without
Woven fabric：It is that polymer is squeezed out, is stretched, after forming continuous filaments, long filament is laid with networking, and fibre web bonds using itself, is hot sticky
Conjunction, chemical adhesion or mechanical consolidation method, make fibre web become non-woven fabrics；Spunlace non-woven cloth：It is to arrive the fine water flow jet of high pressure
On one or more layers web, it intertwine with each other fiber together, thus so that fibre web is reinforced and have certain strength, spunbond
Its feel of non-woven fabrics is not soft enough, and spunlace non-woven cloth comfortable feel, softness, but its strength is insufficient, it is proposed that a kind of spunbond
The non-woven cloth forming technique that water jet process combines.
【Summary of the invention】
The object of the invention is to solve the problems of the prior art, it is non-woven to propose that a kind of spun-bonded spunlace technique combines
Molding with cloth technology, using first spunbond lapping again spun lacing reinforce carry out non-woven fabrics production, can make non-woven fabrics have fluffy sense, thickness
True feeling increases the strength of non-woven fabrics, and can substitute hot wind cloth reduces production cost.
To achieve the above object, the invention proposes the non-woven cloth forming technique that a kind of spun-bonded spunlace technique combines, packets
Include following steps：
A) raw material melting mixing：It is fed in hopper after raw material a is mixed, raw material squeeze by twin (double) screw extruder molten
Melt to obtain melt a, be fed in hopper after raw material b is mixed, raw material carries out extrusion molten by twin (double) screw extruder and obtains melt
b；
B) melt filteration：By it is obtained in a) step prepare melt a, melt b removes impurity through filter respectively online,
Subsequently into spinning system；
C) filature fleece formation：Melt a filtered in b) step, melt b are respectively adopted metering pump and are quantitatively sent into spinning group
Part, after the ejection of spinning machine spinneret, cooling to be consolidated into silk, tow imports draft nozzle and draws by air-flow, on lapper
Lapping respectively obtains web A, web B；
D) spun lacing：Web A obtained in c) step, web B are reinforced in line overlap feeding spun lacing area, obtained
To non-woven fabrics；
E) drying：Non-woven fabrics in d) step after spun lacing is input in baking oven and carries out drying, rolled machine-cut side, at
Volume, packaging factory.
Preferably, the raw material a is different from the ingredient of raw material b, each raw material component ratio in the raw material a：Polypropylene PP
81-86.5 parts, 12.5-16 parts of propylene-based elastomeric, soft 0.5-1.5 parts of master batch, 0.5-1.5 parts of titanium dioxide；The raw material b
Middle each raw material component ratio：83-86.5 parts of polypropylene PP, 12.5-14 parts of propylene-based elastomeric, soft 0.5-1.2 parts of master batch, two
0.7-1.5 parts of titanium oxide.
Preferably, the raw material a is identical as the ingredient of raw material b, each raw material component ratio in described raw material a, b：Polypropylene
81-86.5 parts of PP, 12.5-16 parts of propylene-based elastomeric, soft 0.5-1.5 parts of master batch, 0.5-1.5 parts of titanium dioxide.
Preferably, the discharge pressure of water jet reaches 70-90bar in the d) step.
Preferably, secondary filtration mode of b) the step melt filteration using pre-filtering and essence filtering, the pre- mistake
The precision of filter is less than 80 μm, and the precision of the essence filtering is less than 30 μm.
Preferably, d) the step carries out hydrophilic treated for the non-woven fabrics that spun lacing obtains is completed, treatment fluid is hydrophilic agent
It is mixed into liquid state by weight 1 to 150 with pure water, is heated up to 53 DEG C, band liquid rolling is transmitted to non-woven fabrics.
Preferably, in the step e) drying：Predrying is carried out in one of baking oven first：Predrying temperature is 105
~120 DEG C；Non-woven fabrics, which enters in two baking ovens, after predrying carries out drying：Drying temperature is 110~125 DEG C.
Beneficial effects of the present invention：The present invention uses first spunbond lapping, and spun lacing reinforces the production for carrying out non-woven fabrics again, can
Make non-woven fabrics that there is fluffy sense, solid sense, increase the strength of non-woven fabrics, can substitute hot wind cloth reduces production cost, to nonwoven
Hydrophilic treated is done on the surface layer of cloth, can effectively improve the hydrophily of non-woven fabrics.
Feature and advantage of the invention will be described in detail by embodiment.
【Specific embodiment】
Embodiment 1
The non-woven cloth forming technique that a kind of spun-bonded spunlace technique of the present invention combines, includes the following steps：
A) raw material melting mixing：It is fed in hopper after raw material a is mixed, raw material squeeze by twin (double) screw extruder molten
Melt to obtain melt a, be fed in hopper after raw material b is mixed, raw material carries out extrusion molten by twin (double) screw extruder and obtains melt
b；Each raw material component ratio in the raw material a：81-86.5 parts of polypropylene PP, 12.5-16 parts of propylene-based elastomeric, soft master batch
0.5-1.5 parts, 0.5-1.5 parts of titanium dioxide；Each raw material component ratio in the raw material b：83-86.5 parts of polypropylene PP, acrylic
12.5-14 parts of elastomer, soft 0.5-1.2 parts of master batch, 0.7-1.5 parts of titanium dioxide；
B) melt filteration：By it is obtained in a) step prepare melt a, melt b removes impurity through filter respectively online,
Subsequently into spinning system, using the secondary filtration mode of pre-filtering and essence filtering, the pre-filtered precision is less than 80 μm, institute
The precision of essence filtering is stated less than 30 μm；
C) filature fleece formation：Melt a filtered in b) step, melt b are respectively adopted metering pump and are quantitatively sent into spinning group
Part, after the ejection of spinning machine spinneret, cooling to be consolidated into silk, tow imports draft nozzle and draws by air-flow, on lapper
Lapping respectively obtains web A, web B；
D) spun lacing：Web A obtained in c) step, web B are reinforced in line overlap feeding spun lacing area, obtained
Discharge pressure to non-woven fabrics, water jet reaches 70-90bar；It will complete the non-woven fabrics that spun lacing obtains and carry out hydrophilic treated, processing
Liquid is that hydrophilic agent and pure water 1 to 150 are mixed into liquid state by weight, is heated up to 53 DEG C, band liquid rolling is transmitted to nonwoven
Cloth.
E) drying：Non-woven fabrics in d) step after spun lacing is input in baking oven and carries out drying, first in one of baking oven
Middle carry out predrying：Predrying temperature is 105~120 DEG C；Non-woven fabrics, which enters in two baking ovens, after predrying carries out drying：Drying
Temperature is 110~125 DEG C, rolled machine-cut side, coiled, packaging factory.
Embodiment 2
Embodiment 2 the difference from embodiment 1 is that：In step a)：Each raw material component ratio in the raw material a：Polypropylene PP
81-86.5 parts, 12.5-16 parts of propylene-based elastomeric, soft 0.5-1.5 parts of master batch, 0.5-1.5 parts of titanium dioxide；The raw material a
It is identical as the component of raw material b；
The non-woven cloth forming technique that a kind of spun-bonded spunlace technique of the present invention combines, the present invention use first spunbond lapping water again
Thorn reinforces the production for carrying out non-woven fabrics, and non-woven fabrics can be made to have fluffy sense, solid sense, increase the strength of non-woven fabrics, can replace
Production cost is reduced for hot wind cloth, hydrophilic treated is done to the surface layer of non-woven fabrics, can effectively improve the hydrophily of non-woven fabrics.
Above-described embodiment is the description of the invention, is not limitation of the invention, after any pair of simple transformation of the present invention
Scheme all belong to the scope of protection of the present invention.
Claims (7)
1. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique combines, it is characterised in that：Include the following steps：
A) raw material melting mixing：It is fed in hopper after raw material a is mixed, raw material carries out extrusion molten by twin (double) screw extruder and obtains
It to melt a, is fed in hopper after raw material b is mixed, raw material carries out extrusion molten by twin (double) screw extruder and obtains melt b；
B) melt filteration：Melt a, the melt b of preparing obtained in a) step is removed into impurity through filter respectively online, then
Into spinning system；
C) filature fleece formation：Melt a filtered in b) step, melt b are respectively adopted metering pump and are quantitatively sent into filament spinning component, is passed through
Cooling to be consolidated into silk after spinning machine spinneret sprays, tow imports draft nozzle and draws by air-flow, the lapping point on lapper
Web A, web B are not obtained；
D) spun lacing：Web A obtained in c) step, web B are reinforced in line overlap feeding spun lacing area, obtain nothing
Woven fabric；
E) drying：Non-woven fabrics in d) step after spun lacing is input in baking oven and carries out drying, it is rolled machine-cut side, coiled,
Packaging factory.
2. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique as described in claim 1 combines, it is characterised in that：It is described
Raw material a is different from the ingredient of raw material b, each raw material component ratio in the raw material a：81-86.5 parts of polypropylene PP, Propylene-based elastomers
12.5-16 parts of body, soft 0.5-1.5 parts of master batch, 0.5-1.5 parts of titanium dioxide；Each raw material component ratio in the raw material b：Poly- third
83-86.5 parts of alkene PP, 12.5-14 parts of propylene-based elastomeric, soft 0.5-1.2 parts of master batch, 0.7-1.5 parts of titanium dioxide.
3. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique as described in claim 1 combines, it is characterised in that：It is described
Raw material a is identical as the ingredient of raw material b, each raw material component ratio in the raw material a：81-86.5 parts of polypropylene PP, Propylene-based elastomers
12.5-16 parts of body, soft 0.5-1.5 parts of master batch, 0.5-1.5 parts of titanium dioxide.
4. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique as described in claim 1 combines, it is characterised in that：It is described
D) discharge pressure of water jet reaches 70-90bar in step.
5. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique as described in claim 1 combines, it is characterised in that：It is described
B) the secondary filtration mode that step melt filteration is filtered using pre-filtering and essence, the pre-filtered precision are described less than 80 μm
The precision of essence filtering is less than 30 μm.
6. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique as described in claim 1 combines, it is characterised in that：It is described
D) step will complete the non-woven fabrics that spun lacing obtains and carry out hydrophilic treated, and treatment fluid is hydrophilic agent and pure water by weight 1 to 150
It is mixed into liquid state, is heated up to 53 DEG C, band liquid rolling is transmitted to non-woven fabrics.
7. the non-woven cloth forming technique that a kind of spun-bonded spunlace technique as described in claim 1 combines, it is characterised in that：It is described
In step e) drying：Predrying is carried out in one of baking oven first：Predrying temperature is 105~120 DEG C；Non-woven fabrics after predrying
Into carrying out drying in two baking ovens：Drying temperature is 110~125 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596387.XA CN108823810A (en) | 2018-06-11 | 2018-06-11 | A kind of non-woven cloth forming technique that spun-bonded spunlace technique combines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596387.XA CN108823810A (en) | 2018-06-11 | 2018-06-11 | A kind of non-woven cloth forming technique that spun-bonded spunlace technique combines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108823810A true CN108823810A (en) | 2018-11-16 |
Family
ID=64145158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810596387.XA Pending CN108823810A (en) | 2018-06-11 | 2018-06-11 | A kind of non-woven cloth forming technique that spun-bonded spunlace technique combines |
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| CN (1) | CN108823810A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636146A (en) * | 2020-05-18 | 2020-09-08 | 江苏科来材料科技有限公司 | A kind of preparation method of non-woven fabric |
| CN114009895A (en) * | 2021-09-17 | 2022-02-08 | 江苏鼎顺医疗用品有限公司 | A kind of medical foot cover and its manufacturing method |
| CN117569006A (en) * | 2023-12-20 | 2024-02-20 | 石狮佳南热熔胶有限公司 | TPU nonwoven production process |
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| CN101410162A (en) * | 2006-03-28 | 2009-04-15 | 伊利玛-过滤装置有限公司 | Pleatable non-woven material and method and device for production thereof |
| US20150091216A1 (en) * | 2010-12-01 | 2015-04-02 | Cytec Technology Corp. | Resin-soluble veils for composite article fabrication and methods of manufacturing the same |
| CN105463699A (en) * | 2015-11-12 | 2016-04-06 | 浙江金三发非织造布有限公司 | Super-soft skin-close mask specific non-woven fabric and manufacturing method for same |
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2018
- 2018-06-11 CN CN201810596387.XA patent/CN108823810A/en active Pending
Patent Citations (4)
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| CN101410162A (en) * | 2006-03-28 | 2009-04-15 | 伊利玛-过滤装置有限公司 | Pleatable non-woven material and method and device for production thereof |
| CN101195947A (en) * | 2007-12-04 | 2008-06-11 | 东华大学 | A kind of spun-bonded nonwoven fabric and its manufacturing method |
| US20150091216A1 (en) * | 2010-12-01 | 2015-04-02 | Cytec Technology Corp. | Resin-soluble veils for composite article fabrication and methods of manufacturing the same |
| CN105463699A (en) * | 2015-11-12 | 2016-04-06 | 浙江金三发非织造布有限公司 | Super-soft skin-close mask specific non-woven fabric and manufacturing method for same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636146A (en) * | 2020-05-18 | 2020-09-08 | 江苏科来材料科技有限公司 | A kind of preparation method of non-woven fabric |
| CN114009895A (en) * | 2021-09-17 | 2022-02-08 | 江苏鼎顺医疗用品有限公司 | A kind of medical foot cover and its manufacturing method |
| CN117569006A (en) * | 2023-12-20 | 2024-02-20 | 石狮佳南热熔胶有限公司 | TPU nonwoven production process |
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Address after: 313100 new century Industrial Park, Li Jiaxiang, Changxing County, Huzhou, Zhejiang Applicant after: Zhejiang Jinsanfa Sanitary Material Technology Co., Ltd. Address before: 313100 new century Industrial Park, Li Jiaxiang, Changxing County, Huzhou, Zhejiang Applicant before: Zhejiang Kingsafe Now-woven Co., Ltd. |
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Application publication date: 20181116 |
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| RJ01 | Rejection of invention patent application after publication |