CN1445264A - Anti-virus thin film and biaxial tension technique - Google Patents
Anti-virus thin film and biaxial tension technique Download PDFInfo
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- CN1445264A CN1445264A CN 03117512 CN03117512A CN1445264A CN 1445264 A CN1445264 A CN 1445264A CN 03117512 CN03117512 CN 03117512 CN 03117512 A CN03117512 A CN 03117512A CN 1445264 A CN1445264 A CN 1445264A
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Abstract
An antibacterial film is prepared from polyacrylic resin, assistant and antibacterial mother particles through bidirectional drawing. Its advantages are high and durable bacteria killing and suppressing effect and antimildew effect, high strength, uniformity, transparency, and thermal stability, and high safety.
Description
(1) technical field
The present invention relates to a kind of antibacterial film, and the stretch processes of this kind film.
(2) technical background
Existing various bacteriums and fungi inevitably in the environment of our life, under the temperature that is fit to, humidity condition, will breed fast, is the biggest threat to human health.Along with development of science and technology and growth in the living standard, to health and healthy pay attention to day by day, the antibacterial resin goods receive an acclaim.Antibiotic plastic is to have added antiseptic-germicide.Mainly contain inorganic antiseptic and organic antibacterial agent at present.Inorganic antiseptic is an effective ingredient with metal and compound thereof generally, and commonly used have copper, silver, zinc, titanium, a mercury etc.The inorganic antiseptic antibacterial effect is stable for a long time, but to the mould DeGrain, and relatively poor with the plastic substrate consistency, influences the processing of plastic performance, just is subjected to very big restriction as the production of biaxially oriented film; Particularly the heavy metal ion of its stripping does not meet the food safety requirement.The organic antibacterial agent major ingredient is a synthesis of organic substance, and its antibiotic speed is fast, bactericidal range is wide, and is effective to mould, but its defective is obvious equally, and the leachable poor stability, thermotolerance is relatively poor, duration of efficacy is short, also influences its application.
(3) summary of the invention
The objective of the invention is to design a kind of antibacterial film prescription, this film all has good killing action for the bacterium fungi, simultaneously safety non-toxic.The present invention also aims to design the stretch processes of this kind film.
The major ingredient of antibacterial film of the present invention is an acrylic resin, add auxiliary agents such as an amount of static inhibitor, slipping agent, release agent, in needing the top layer materials of antibacterial, add the organic anti-bacterial functional group and be assembled in the antibacterial matrices of the molecule assembling on the molecular chain of matrix resin, the weight percent that adds is 1.0～20.0%, mix, through the certain multiple two-way stretch, become antibacterial film.
Stretch processes at this kind film of the present invention comprises fusion, plasticizing, the measurement extrusion forming sheet material of general stretch processes, vertical by certain multiple respectively, cross directional stretch after the preheating, heat setting type, side cut, thickness measuring, surface corona are handled, rolling, after maturation process, cut, the antibacterial film product.In this manufacturing process, antibacterial plastic concentrate carries out drying before using, and water ratio is reduced.Again antibacterial plastic concentrate and pp material are mixed according to the above ratio, treat down that step process uses.Make moist because of antibacterial plastic concentrate more easily absorbs water, its water ratio influences quality product.
The advantage of antibacterial film of the present invention is: 1, have significant sterilization, bacteriostasis property and mildew-resistant characteristic, this antibacterial film reaches more than 99.9% intestinal bacteria and streptococcus aureus antibiotic rate after testing, and multiple mould mildew-resistant grades such as aspergillus niger, flavus, aspergillus versicolor are reached 1 grade; Therefore this antibacterial film can be widely used in the packing of medicine, food agricultural byproducts and other article, can not only effectively suppress the generation of the various bacteriums of packaging article, fungi and mould, and can kill the original bacterium in products to be packaged surface rapidly, guaranteed the quality of connection with wrapping of piece; What 2, this antibacterial film adopted is the antibacterial matrices of molecule assembling, and its functional group has positive electricity, is attracted on the electronegative microorganism cells, changes the necessary charge environment of its growth and breeding, thereby reaches sterilization, bacteriostatic purpose.Therefore sterilization, the bacteriostasis property of this antibacterial film can keep for a long time, and the people is not had influence, guarantee safe in utilization; 3, this antibacterial film also can be multi-layer co-extruded film, only adds a certain proportion of antibacterial plastic concentrate on needs antimicrobial top layer and can reach antibacterial effect, saves the consumption of antibacterial plastic concentrate; 4, this antibacterial film is the stretch processes manufacturing, film strength height, thickness good evenness, glossiness height, good, the Heat stability is good of transparency; 5, antibacterial plastic concentrate has improved the antistatic property of film; 6, this antibacterial film also can add different additives and makes polytype films such as pearly-lustre film with antibacterial ability, heat-sealing film, matt film, to be suitable for different service requirementss.
The advantage of the stretch processes of antibacterial film of the present invention is: 1, adopt original two-way stretch equipment fully; 2, guaranteed the good quality such as intensity, thickness uniformity coefficient, glossiness, transparency, thermostability of antibacterial film; And saving starting material.(4) embodiment
The major ingredient of antibacterial film of the present invention is an acrylic resin, add auxiliary agents such as an amount of static inhibitor, slipping agent, release agent, in needing the top layer materials of antibacterial, add the organic anti-bacterial functional group and be assembled in the antibacterial matrices of the molecule assembling on the molecular chain of matrix resin, the weight percent that adds is 1.0～20.0%, mix, through the certain multiple two-way stretch, become antibacterial film.
The weight percent that antibacterial matrices adds is that 3.0～5.0% effects are better.
The weight percent that antibacterial matrices adds is 4.0～5.0% best results.
Described acrylic resin is homo-polypropylene resin or atactic copolymerized polypropene resin.
Add release agent and/or static inhibitor and/or slipping agent in the film, the weight percent of adding is respectively 0～4.0%, 0～5.0%, 0.5～16.0%, in order to improve film performance.
The antibacterial film batching is with delustring masterbatch or pearly-lustre masterbatch and brighten the masterbatch coextrusion, makes specialty films.
Stretch processes at this kind film of the present invention comprises fusion, plasticizing, the measurement extrusion forming sheet material of general stretch processes, vertical by certain multiple respectively, cross directional stretch after the preheating, heat setting type, side cut, thickness measuring, surface corona are handled, rolling, after maturation process, cut, make the antibacterial film product.In this manufacturing process, antibacterial plastic concentrate under 100～110 ℃ temperature dry 1～8 hour.
In the sheet moulding process, because of antibacterial plastic concentrate has stronger polarity, with the effect of playing nucleator after pp material mixes therein, accelerated the crystallization velocity of sheet, so the temperature of its chilling roller or water coolant will reduce by 5～10 ℃ than the temperature of stretching ordinary polypropylene film.For different two-way stretch equipment, for the film of stretching different thickness, the temperature of chilling roller or water coolant all has difference, and this temperature is 20～35 ℃ during the stretching ordinary polypropylene film, and during the stretching antibacterial film, this temperature is 15～25 ℃,
Below be the specific embodiment of antibacterial film of the present invention and stretch processes, proportioning components wherein all is weight percentage:
Embodiment 1 antimicrobial form polypropylene light film
Antibacterial plastic concentrate under 100 ℃ temperature dry 8 hours.
1. extrude the structure into ABA for three layers, promptly antimicrobial surface and non-antibiotic sandwich layer are formed film up and down.Thickness 15 μ m.Wherein:
Top layer A batching: homo-polypropylene resin 77.0～79.5%, antibacterial plastic concentrate 18.0～20.0%, release agent 2.5～3.0%;
Sandwich layer B batching: homo-polypropylene resin 94.0～95.5%, static inhibitor 3.0～4.0%, slipping agent 1.5～2.0%;
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 25 ℃.
2. extrude the structure into ABC for three layers, promptly antimicrobial surface, non-antimicrobial surface and non-antibiotic sandwich layer constitute film.Thickness 15 μ m.Wherein:
Top layer A batching: homo-polypropylene resin 77.0～79.5%, antibacterial plastic concentrate 18.0～20.0%, release agent 2.5～3.0%;
Sandwich layer B batching: homo-polypropylene resin 94.0～95.5%, static inhibitor 3.0～4.0%, slipping agent 1.5～2.0%;
Top layer C batching: homo-polypropylene resin 97.0～97.5%, release agent 2.5～3.0%;
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 25 ℃.
3. extrude structure more than three layers, promptly antimicrobial surface or single antimicrobial surface, common top layer and the non-antibiotic sandwich layer more than two layers are formed film, thickness 15 μ m up and down.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 25 ℃.
Embodiment 2 antimicrobial form polypropylene single face heat-sealing films
Antibacterial plastic concentrate under 110 ℃ temperature dry 1 hour.
1. extrude the structure into AB for two layers, promptly antibiotic heat-sealing top layer and non-antibiotic layer are formed film.Thickness 25 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 93.0～96.0%, antibacterial plastic concentrate 2.0～4.0%, release agent 2.0～3.0%;
B layer batching: homo-polypropylene resin 96.0～97.2%, static inhibitor 2.0～3.0%, slipping agent 0.8～1.0%;
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 15 ℃.
2. extrude the structure into ABC for three layers, promptly antibiotic heat-sealing top layer, common top layer and non-antibiotic sandwich layer constitute film, thickness 25 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 93.0～96.0%, antibacterial plastic concentrate 2.0～4.0%, release agent 2.0～3.0%;
Sandwich layer B batching: homo-polypropylene resin 96.0～97.2%, static inhibitor 2.0～3.0%, slipping agent 0.8～1.0%;
Top layer C batching: homo-polypropylene resin 97.0～98.0%, release agent 2.0～3.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 15 ℃.
3. extrude structure more than three layers, i.e. up and down antimicrobial surface or single antimicrobial surface, common top layer and non-antibiotic sandwich layer formation film more than two layers, thickness 25 μ m.
Embodiment 3 antimicrobial form polypropylene two-sided heat-sealing films
Antibacterial plastic concentrate under 105 ℃ temperature dry 2 hours.
1. extrude the structure into ABA for three layers, promptly antibiotic heat-sealing top layer and non-antibiotic layer are formed film up and down.Thickness 20 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 94.0～97.0%, antibacterial plastic concentrate 1.0～3.0%, release agent 2.0～3.0%;
Sandwich layer B batching: homo-polypropylene resin 96.0～97.2%, static inhibitor 2.0～3.0%, slipping agent 0.8～1.0%;
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 20 ℃.
2. extrude the structure into ABC for three layers, promptly antibiotic heat-sealing top layer, non-antibiotic heat-sealing top layer and non-antibiotic sandwich layer constitute film, thickness 20 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 94.0～97.0%, antibacterial plastic concentrate 1.0～3.0%, release agent 2.0～3.0%;
Sandwich layer B batching: homo-polypropylene resin 96.0～97.2%, static inhibitor 2.0～3.0%, slipping agent 0.8～1.0%;
Top layer C batching: atactic copolymerized polypropene resin 97.0～98.0%, release agent 2.0～3.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 20 ℃.
Embodiment 4 antimicrobial form polypropylene matt films
Antibacterial plastic concentrate under 105 ℃ temperature dry 3 hours.
1. extrude the structure into AB for two layers, promptly antibiotic delustring top layer and non-antibiotic layer are formed film.Thickness 20 μ m.Wherein:
Top layer A batching: delustring masterbatch 95.0～96.0%, antibacterial plastic concentrate 4.0～5.0%;
B layer batching: homo-polypropylene resin 95.0～97.5%, static inhibitor 2.0～4.0%, release agent 0.5～1.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 25 ℃.
2. extrude the structure into ABC for three layers, promptly antimicrobial surface, non-antibiotic delustring top layer and non-antibiotic sandwich layer constitute film.Thickness 20 μ m.Wherein:
Top layer A batching: homo-polypropylene resin 92.0～94.0%, antibacterial plastic concentrate 4.0～5.0%, release agent 2.0～3.0%;
Sandwich layer B batching: homo-polypropylene resin 96.0～98.0%, static inhibitor 2.0～4.0%;
Top layer C batching: delustring masterbatch 100%.
Make film through stretch processes, the temperature of its chilling roller or water coolant is 25 ℃.
Embodiment 5 antimicrobial form polypropylene single faces heat-sealing pearly-lustre film
Antibacterial plastic concentrate under 105 ℃ temperature dry 4 hours.
1. extrude the structure into AB for two layers, promptly antibiotic heat-sealing top layer and non-antibiotic layer are formed film.Thickness 25 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 92.0～95.5%, antibacterial plastic concentrate 3.0～5.0%, release agent 1.5～3.0%;
B layer batching: homo-polypropylene resin 79.5～84.0%, pearly-lustre masterbatch 11.0～13.0% brightens masterbatch 3.0～3.5%, static inhibitor 1.5～3.0%, slipping agent 0.5～1.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 23 ℃.
2. extrude the structure into ABC for three layers, promptly antimicrobial surface, non-antibiotic heat-sealing top layer and non-antibiotic sandwich layer constitute film.Thickness 25 μ m.Wherein:
Top layer A batching: homo-polypropylene resin 92.0～95.5%, antibacterial plastic concentrate 3.0～5.0%, release agent 1.5～3.0%;
Sandwich layer B batching: homo-polypropylene resin 79.5～84.0%, pearly-lustre masterbatch 11.0～13.0% brightens masterbatch 3.0～3.5%, static inhibitor 1.5～3.0%, slipping agent 0.5～1.0%.
Top layer C batching: atactic copolymerized polypropene resin 97.0～98.5%, release agent 1.5～3.0%;
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 23 ℃.
Embodiment 6 antimicrobial form polypropylene two-sided heat-sealing pearly-lustre films
Antibacterial plastic concentrate under 105 ℃ temperature dry 5 hours.
1. extrude the structure into ABA for three layers, promptly antibiotic heat-sealing top layer and non-antibiotic sandwich layer are formed film up and down.Thickness 28 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 82.0～86.5%, antibacterial plastic concentrate 12.0～15.0%, release agent 1.5～3.0%;
Sandwich layer B batching: homo-polypropylene resin 79.5～84.0%, pearly-lustre masterbatch 11.0～13.0% brightens masterbatch 3.0～3.5%, static inhibitor 1.5～3.0%, slipping agent 0.5～1.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 20 ℃.
2. extrude the structure into ABC for three layers, promptly antibiotic heat-sealing top layer, non-antibiotic heat-sealing top layer and non-antibiotic sandwich layer constitute film.Thickness 28 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 82.0～86.5%, antibacterial plastic concentrate 12.0～15.0%, release agent 1.5～3.0%;
Sandwich layer B batching: homo-polypropylene resin 79.5～84.0%, pearly-lustre masterbatch 11.0～13.0% brightens masterbatch 3.0～3.5%, static inhibitor 1.5～3.0%, slipping agent 0.5～1.0%.
Top layer C batching: atactic copolymerized polypropene resin 97.0～98.5%, release agent 1.5～3.0%;
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 20 ℃.
Embodiment 7: antimicrobial form polypropylene cigarette film
Antibacterial plastic concentrate under 105 ℃ temperature dry 6 hours.
1. extrude the structure into ABA for three layers, promptly antibiotic heat-sealing top layer and non-antibiotic sandwich layer are formed film up and down.Thickness 20 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 79.0～89.0%, antibacterial plastic concentrate 3.0～5.0%, super slip(ping)agent 8.0～16.0%;
Sandwich layer B batching: homo-polypropylene resin 96.0～97.0% increases cunning/static inhibitor 3.0～4.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 18 ℃.
2. extrude the structure into ABC for three layers, promptly antibiotic heat-sealing top layer, non-antibiotic heat-sealing top layer and non-antibiotic sandwich layer constitute film.Thickness 20 μ m.Wherein:
Top layer A batching: atactic copolymerized polypropene resin 79.0～89.0%, antibacterial plastic concentrate 3.0～5.0%, super slip(ping)agent 8.0～16.0%;
Sandwich layer B batching: homo-polypropylene resin 96.0～97.0% increases cunning/static inhibitor 3.0～4.0%;
Top layer C batching: atactic copolymerized polypropene resin 84.0～92.0%, super slip(ping)agent 8.0～16.0%.
Make antibacterial film through stretch processes, the temperature of its chilling roller or water coolant is 18 ℃.
Claims (7)
1 one kinds of antibacterial films, major ingredient are acrylic resin, add auxiliary agents such as an amount of static inhibitor, slipping agent, release agent, through the certain multiple two-way stretch, become antibacterial film, it is characterized by:
Add the organic anti-bacterial functional group and be assembled in the antibacterial matrices of the molecule assembling on the molecular chain of matrix resin in needing the top layer materials of antibacterial, the weight percent of adding is 1.0～20.0%.
2 antibacterial films according to claim 1 is characterized by:
The weight percent that antibacterial matrices adds is 3.0～5.0%.
3 antibacterial films according to claim 1 is characterized by:
The weight percent that antibacterial matrices adds is 4.0～5.0%.
4 according to claim 1 or 2 or 3 described antibacterial films, it is characterized by:
Described acrylic resin is homo-polypropylene resin or atactic copolymerized polypropene resin.
5 according to claim 1 or 2 or 3 described antibacterial films, it is characterized by:
Add release agent and/or static inhibitor and/or slipping agent in the film, the weight percent of adding is respectively 0～4.0%, 0～5.0%, 0.5～16.0%.
6 one kinds of stretch processes of making antibacterial film, the fusion, plasticizing, the measurement extrusion forming sheet material that comprise general stretch processes, vertical by certain multiple respectively, cross directional stretch after the preheating, heat setting type, side cut, thickness measuring, surface corona are handled, rolling, after maturation process, cut, it is characterized by:
Antibacterial plastic concentrate under 100～110 ℃ temperature dry 1～8 hour.
The stretch processes of 7 antibacterial films according to claim 6 is characterized by:
In the sheet moulding process, the temperature of its chilling roller or water coolant reduces by 5～10 ℃ than the temperature of stretching ordinary polypropylene film, is 15～25 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03117512 CN1257932C (en) | 2003-03-18 | 2003-03-18 | Anti-virus thin film and biaxial tension technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03117512 CN1257932C (en) | 2003-03-18 | 2003-03-18 | Anti-virus thin film and biaxial tension technique |
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| CN1445264A true CN1445264A (en) | 2003-10-01 |
| CN1257932C CN1257932C (en) | 2006-05-31 |
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| CN 03117512 Expired - Fee Related CN1257932C (en) | 2003-03-18 | 2003-03-18 | Anti-virus thin film and biaxial tension technique |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276911A (en) * | 2010-06-12 | 2011-12-14 | 中国石油化工股份有限公司 | Two-way stretch polypropylene film with functions of antibiosis and mildew resistance and preparation method thereof |
| CN102806735A (en) * | 2012-08-30 | 2012-12-05 | 江苏奔多新材料有限公司 | High-fastness aluminum plating polypropylene (PP) film and production process thereof |
| CN105584182A (en) * | 2016-01-28 | 2016-05-18 | 海宁长昆包装有限公司 | Manufacture process of anti-static antibacterial silver ion BOPP bag making membrane |
| CN106273945A (en) * | 2016-08-03 | 2017-01-04 | 海宁长昆包装有限公司 | A kind of anti-electrostatic antibiotic Biaxially oriented polypropylene bag film and production technology thereof |
| CN106674745A (en) * | 2016-12-26 | 2017-05-17 | 山东泗水康得新复合材料有限公司 | High heat-resistant BOPP (biaxially-oriented polypropylene) thin film |
| CN109693404A (en) * | 2017-10-20 | 2019-04-30 | 维龙（上海）包装工业有限公司 | A kind of anti-harmful microorganism polypropylene film and its manufacturing method |
| CN113547768A (en) * | 2021-06-30 | 2021-10-26 | 平湖展鹏热熔胶膜有限公司 | Preparation method of biaxially oriented medical crack film |
-
2003
- 2003-03-18 CN CN 03117512 patent/CN1257932C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276911A (en) * | 2010-06-12 | 2011-12-14 | 中国石油化工股份有限公司 | Two-way stretch polypropylene film with functions of antibiosis and mildew resistance and preparation method thereof |
| CN102276911B (en) * | 2010-06-12 | 2014-03-12 | 中国石油化工股份有限公司 | Two-way stretch polypropylene film with functions of antibiosis and mildew resistance and preparation method thereof |
| CN102806735A (en) * | 2012-08-30 | 2012-12-05 | 江苏奔多新材料有限公司 | High-fastness aluminum plating polypropylene (PP) film and production process thereof |
| CN105584182A (en) * | 2016-01-28 | 2016-05-18 | 海宁长昆包装有限公司 | Manufacture process of anti-static antibacterial silver ion BOPP bag making membrane |
| CN106273945A (en) * | 2016-08-03 | 2017-01-04 | 海宁长昆包装有限公司 | A kind of anti-electrostatic antibiotic Biaxially oriented polypropylene bag film and production technology thereof |
| CN106674745A (en) * | 2016-12-26 | 2017-05-17 | 山东泗水康得新复合材料有限公司 | High heat-resistant BOPP (biaxially-oriented polypropylene) thin film |
| CN109693404A (en) * | 2017-10-20 | 2019-04-30 | 维龙（上海）包装工业有限公司 | A kind of anti-harmful microorganism polypropylene film and its manufacturing method |
| CN113547768A (en) * | 2021-06-30 | 2021-10-26 | 平湖展鹏热熔胶膜有限公司 | Preparation method of biaxially oriented medical crack film |
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| Publication number | Publication date |
|---|---|
| CN1257932C (en) | 2006-05-31 |
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Owner name: GUILIN JIQI ZHENGFENG ANTIBACTERIAL MATERIAL CO., Free format text: FORMER OWNER: JIQI PACKING CO. LTD., GUILIN Effective date: 20060512 |
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Effective date of registration: 20060512 Address after: 541003 No. 3 Pingshan North Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: Guilin Chi Chi Feng Feng antibacterial material Co.,Ltd. Address before: 541003 No. 3 Pingshan North Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: Guilin Jiqi Packing Co.,Ltd. |
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Owner name: GUILIN XINXIANLI ANTIBACTERIAL MATERIALS CO., LTD. Free format text: FORMER NAME OR ADDRESS: GUILIN XINLI ANTIBACTERIAL MATERIALS CO., LTD. Owner name: GUILIN XINLI ANTIBACTERIAL MATERIALS CO., LTD. Free format text: FORMER NAME OR ADDRESS: GUILIN JIQI ZHENGFENG ANTIBACTERIAL MATERIAL CO., LTD. |
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Address after: 541003 No. 3 Pingshan North Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: GUILIN PRENOVO ANTIBACTERIAL MATERIAL Co.,Ltd. Address before: 541003 No. 3 Pingshan North Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: Guilin Xinxianli Antibacterial Material Co.,Ltd. Address after: 541003 No. 3 Pingshan North Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: Guilin Xinxianli Antibacterial Material Co.,Ltd. Address before: 541003 No. 3 Pingshan North Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: Guilin Chi Chi Feng Feng antibacterial material Co.,Ltd. |
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