CN102817099A - Production process for terylene insecticidal fabric - Google Patents
Production process for terylene insecticidal fabric Download PDFInfo
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- CN102817099A CN102817099A CN201210259592XA CN201210259592A CN102817099A CN 102817099 A CN102817099 A CN 102817099A CN 201210259592X A CN201210259592X A CN 201210259592XA CN 201210259592 A CN201210259592 A CN 201210259592A CN 102817099 A CN102817099 A CN 102817099A
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- terylene
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- desinsection
- generate
- production technology
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- 239000005020 polyethylene terephthalate Substances 0.000 title claims abstract description 90
- 229920004933 Terylene® Polymers 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000004744 fabric Substances 0.000 title abstract description 20
- 230000000749 insecticidal effect Effects 0.000 title abstract 4
- 238000009941 weaving Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000000575 pesticide Substances 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 claims description 16
- 235000010603 pastilles Nutrition 0.000 claims description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 11
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 8
- 238000009987 spinning Methods 0.000 claims description 7
- 229940024113 allethrin Drugs 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 239000005946 Cypermethrin Substances 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 5
- 230000008025 crystallization Effects 0.000 claims description 5
- -1 cyfloxylate Chemical compound 0.000 claims description 5
- KAATUXNTWXVJKI-UHFFFAOYSA-N cypermethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-UHFFFAOYSA-N 0.000 claims description 5
- 229960005424 cypermethrin Drugs 0.000 claims description 5
- OWZREIFADZCYQD-NSHGMRRFSA-N deltamethrin Chemical compound CC1(C)[C@@H](C=C(Br)Br)[C@H]1C(=O)O[C@H](C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 OWZREIFADZCYQD-NSHGMRRFSA-N 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- KAATUXNTWXVJKI-NSHGMRRFSA-N (1R)-cis-(alphaS)-cypermethrin Chemical compound CC1(C)[C@@H](C=C(Cl)Cl)[C@H]1C(=O)O[C@H](C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-NSHGMRRFSA-N 0.000 claims description 4
- 239000005877 Alpha-Cypermethrin Substances 0.000 claims description 4
- 235000007516 Chrysanthemum Nutrition 0.000 claims description 4
- ZXQYGBMAQZUVMI-UNOMPAQXSA-N cyhalothrin Chemical compound CC1(C)C(\C=C(/Cl)C(F)(F)F)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 ZXQYGBMAQZUVMI-UNOMPAQXSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- ZCVAOQKBXKSDMS-AQYZNVCMSA-N (+)-trans-allethrin Chemical compound CC1(C)[C@H](C=C(C)C)[C@H]1C(=O)OC1C(C)=C(CC=C)C(=O)C1 ZCVAOQKBXKSDMS-AQYZNVCMSA-N 0.000 claims description 3
- FMTFEIJHMMQUJI-NJAFHUGGSA-N 102130-98-3 Natural products CC=CCC1=C(C)[C@H](CC1=O)OC(=O)[C@@H]1[C@@H](C=C(C)C)C1(C)C FMTFEIJHMMQUJI-NJAFHUGGSA-N 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- GQNBIMLHUAWKHJ-UHFFFAOYSA-N [4-(methoxymethyl)phenyl]methyl 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate Chemical compound C1=CC(COC)=CC=C1COC(=O)C1C(C)(C)C1C=C(C)C GQNBIMLHUAWKHJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 238000007791 dehumidification Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005453 pelletization Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000009965 tatting Methods 0.000 claims description 3
- 244000189548 Chrysanthemum x morifolium Species 0.000 claims 1
- 229940079593 drug Drugs 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 241000255925 Diptera Species 0.000 description 27
- 230000006870 function Effects 0.000 description 10
- 238000005406 washing Methods 0.000 description 10
- 241000238631 Hexapoda Species 0.000 description 6
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 6
- 229920000728 polyester Polymers 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 229920001684 low density polyethylene Polymers 0.000 description 5
- 239000004702 low-density polyethylene Substances 0.000 description 5
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229920004934 Dacron® Polymers 0.000 description 4
- 238000003197 gene knockdown Methods 0.000 description 4
- 241000723353 Chrysanthemum Species 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005108 dry cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010014599 encephalitis Diseases 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- RLLPVAHGXHCWKJ-UHFFFAOYSA-N permethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 RLLPVAHGXHCWKJ-UHFFFAOYSA-N 0.000 description 2
- 229960000490 permethrin Drugs 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 241000256173 Aedes albopictus Species 0.000 description 1
- 208000001490 Dengue Diseases 0.000 description 1
- 206010012310 Dengue fever Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 208000025729 dengue disease Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005541 medical transmission Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
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- 238000006068 polycondensation reaction Methods 0.000 description 1
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- 238000000746 purification Methods 0.000 description 1
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- 239000012209 synthetic fiber Substances 0.000 description 1
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- Agricultural Chemicals And Associated Chemicals (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a production process for a terylene insecticidal fabric. The process comprises the following steps: producing terylene wet section particles and producing dry terylene sections by using the wet terylene section particles; and producing drug-containing terylene yarns from the dry terylene sections and weaving the drug-containing terylene yarns so as to obtain the terylene insecticidal fabric. The terylene insecticidal fabric produced in the invention has a long-acting insect-expelling function.
Description
Technical field
The present invention relates to a kind of mosquito repellent textile material production technology, specifically, relate to a kind of terylene desinsection lining production technology.
Background technology
Textiles commonly used does not now possess the mosquito and insect expelling function like clothes, mosquito net, coverlet etc., and people's daily routines tend to receive having a strong impact on of mosquito.Because mosquito net does not have function of driving mosquitoes, mosquito can fly into and bite human body in bed evening, and the people can not be fallen asleep; Because clothes does not have function of driving mosquitoes, people's cognition is not stopped to bite by mosquito, has a strong impact on people's work and life.
In addition, mosquito also can spread disease, and different types of mosquito can be propagated different disease.Recently, disease transmissions such as China's some areas encephalitis B (being called for short " encephalitis "), dengue fever, the routes of infection of these diseases mainly are through mosquito.Mosquito is very a kind of harmful insects that see of summer and autumn more, and it is that to the harm of human body it can infect pathogen to healthy subjects after biting ill animal or human's body.
Polyethylene (PE) is divided into high density polyethylene (HDPE) (HDPE) and low density polyethylene (LDPE) (LDPE).High density polyethylene (HDPE) has good washing performance, the dry-cleaning somewhat inferior properties, and it must could obtain bonding effect preferably under higher temperature and bigger pressure, and these characteristics according to it are widely used for doing the men's shirt adhesive lining.Low density polyethylene (LDPE) water-fast washed can be all relatively poor with dry cleaning resistance, but it can be bonding at a lower temperature and bonding strength is preferably arranged, so be widely used in the temporary bonding lining cloth.
Terylene (Terylene) is an important kind in the synthetic fiber, is the trade name of China's polyester fiber.It is with p-phthalic acid (PTA) or dimethyl terephthalate (DMT) (DMT) and ethylene glycol (EG) fiber-forming polymer---the PETG (PET) that to be raw material make through esterification or ester exchange and polycondensation reaction, the fiber of processing through spinning and post processing.
Lack now a kind of can insect protected and the effective weaving face fabric of desinsection, thereby realize active insect and mosquitoe expelling longer.
Summary of the invention
The technical problem that the present invention solved provides a kind of terylene desinsection lining production technology, and the terylene desinsection lining of production has the long-acting insect expelling function.
Technical scheme is following:
A kind of terylene desinsection lining production technology comprises:
Generate the wet section of terylene particle, utilize the wet section of terylene particle to generate terylene and do section;
Utilize terylene to do section and generate the pastille terylene thread, the weaving of pastille terylene thread is generated terylene desinsection lining.
Further; The step that generates the wet section of pastille terylene particle comprises: according to the 1:1 ratio; Utilize phthalic acid and ethylene glycol to generate PETP; Utilize said PETP to generate PET, said PET generates the wet section of terylene after Cast Strip, cooling, drying, pelletizing.
Further, generate terylene and do the step of section and comprise: in wet chip bunker, the wet section of said terylene particle through screening, deironing, pulse carry, crystallization in advance, dry back generate terylene and do section, said terylene is done to cut into slices sends into dried chip bunker; Said preparatory crystallization adopts about 120～170 ℃ hot-air to the section heating; Said dry run comprises: the dry air that drops to below-20 ℃ through dehumidification processing dew point is heated to about 160 ℃; Bottom drying tower, be transported to the drying tower and make the section dehydration with reverse contact of section; Dry air is taken moisture out of from the drying tower top, generate terylene and do section.
Further, the step that generates the pastille terylene thread comprises: said terylene is done section and is sent into static mixer after filtering, in static mixer, adds pesticide; Said terylene is sent into screw extruder after doing section and pesticide mixing, and in screw extruder, said terylene is done section and pesticide fusion; Melt is admitted to spinning head; Said melt forms the melt thread after coming out from spinning head, after the lateral blowing cooling, forms pastille and solidifies strand, generation pastille terylene thread after the warping; Temperature in the said screw extruder is at 270 ℃ to 300 ℃.
Further: said pesticide is chosen alphamethrin, cyfloxylate, cypermethrin, decis, ether chrysanthemum ester, Cyhalothrin, chlorine ether-ether, allethrin, rich d-allethrin or methothrin, and adding proportion is 1～30g/kg of gross mass.
Further, to account for raw material gross mass percentage be between the 1-16% to pesticide.
Further, weaving adopt interweave, tatting or plain weave mode.
Beneficial effect of the present invention comprises:
1, the fabric that utilizes the present invention to produce has the characteristics soft, that resistance to tension is strong and durable, and fabric has the long-acting insect expelling function.Because weaving face fabric of the present invention adopted dosing to handle before braiding, this textiles is soft, in the practical application, and the pulling force that the anti-250KPA of ability is above, washable more than 20 times, the mosquito death rate still reaches 100%, and useful life is more than 5 years; After washing 20 times, the rate of knockdown of mosquito and the death rate also can reach more than 85%.
2, weaving face fabric of the present invention is of many uses, can be used as conventional weaving face fabric and uses.
3, the present invention is different from general mosquito proof means, uses more convenient, clean environmental protection, simultaneously human body is not had injury yet, and is safe in utilization.
4, utilize the present invention effectively to knock down and mosquito killer, and product can be widely used in people's the life to user and washing person's safety.
The specific embodiment
Among the present invention, mosquito-proof, function of driving mosquitoes is realized through pesticide is joined in the yarn.Pesticide can be chosen: one or several combinations in alphamethrin, cyfloxylate, Permethrin, cypermethrin, decis, ether chrysanthemum ester, Cyhalothrin, chlorine ether-ether, allethrin, rich d-allethrin, the methothrin etc., adding proportion is 1～30g/kg.
Select 7 kinds in the present embodiment for use, be respectively: alphamethrin, cyfloxylate, Permethrin, decis, Cyhalothrin, ether chrysanthemum ester and cypermethrin.Pesticide also can be chosen decis 1.8g/kg or cypermethrin 5.5g/kg.
Elaborate in the face of terylene desinsection lining production technology down.
Below be the production technology of terylene thread, pesticide is that the stage just adds at the beginning in the polyester formulation of production technology.
Step 1: generate the wet section of terylene particle;
Utilize terephthalic acid (TPA) (gross mass 50%) and ethylene glycol (gross mass 50%) to generate PETP; Utilize PETP to generate PET; After Cast Strip, cooling, drying, pelletizing, generate the wet section of terylene, the terylene wet granular is sent into wet chip bunker.
Step 2: generate terylene and do section;
In the wet chip bunker; (dry air (dew point drops to below-20 ℃) of process dehumidification processing is heated to about 160 ℃ the wet particle of cutting into slices of terylene after screening, deironing, pulse conveying, preparatory crystallization (hot-air that adopts about 120～170 ℃ is to the section heating), drying; Bottom drying tower, be transported to the drying tower and make section dehydration rapidly with reverse contact of section; Dry air is taken moisture out of from the drying tower top) generate the dried section of terylene, terylene is done section send into dried chip bunker.
Step 3: generate the pastille terylene thread;
Terylene is done section and is sent into static mixer after filtering, in static mixer, adds pesticide, sends into screw extruder after the mixing; In screw extruder, (generally be divided into 6 thermals treatment zone heating and independent control heating-up temperature separately; As far as terylene from the temperature of six thermals treatment zone, first thermal treatment zone to the generally about 270 ℃ to 295 ℃, its temperature adjustment is more flexible, but the temperature of last two zones is controlled in 290 ± 5 ℃ of these scopes usually; Because the temperature of melt when the temperature of last two zones directly has influence on through casing); Terylene is done section and pesticide fusion, and melt is admitted to spinning head, and melt forms the melt thread after coming out from spinning head; After the lateral blowing cooling, form pastille and solidify strand, generate the pastille terylene thread after the warping.Warping is the warp thread of certain radical to be wound on by the length of regulation on axle or beam of a loom, form the pastille terylene thread.
Step 4: generate terylene desinsection lining.
Employing interweaves, tatting, plain weave or other weaving manners become to have and drive or kill mosquito effect screen cloth or lining.Screen cloth or lining can be used to produce mosquito net or clothes.
The washable test of weaving face fabric:
1, it is subsequent use to get the dacron polyester screen cloth sample with function of driving mosquitoes of 25cm*25cm;
2, according to World Health Organization's washing test standard, promptly in large beaker, add 0.5L water and 1g soap, maintenance pH value is 10～11, and 30 ℃ of water temperatures are all dissolved to soap;
3, the dacron polyester screen cloth sample with function of driving mosquitoes of 25cm*25cm size is put into the beaker that contains above washing agent, and beaker is placed on the shaking table, with the weaving face fabric sample 10min of the speed washing of 155 times/min; Afterwards, sample is shifted out, in water purification, clean twice, clean the weaving face fabric sample 10min that on shaking table, washs equally with the speed of 155 times/min;
4, after the washing, under 30 ℃ of room temperatures, dry, be saved to washing next time under the dark condition, 1-3d between each washing needs.
Above process is carried out 20 times repeatedly at least.
The mosquito proof test:
Sensitive strain aedes albopictus (female) 2～5 age in days adults of laboratory rearing.
Test result: the pesticide wash resistant number of times that has in the dacron polyester screen cloth of function of driving mosquitoes is 30 ~ 35 times, and the mosquito death rate reaches more than 100%, even after washing 20 times, the death rate and rate of knockdown also can reach more than 85%.
This result of the test explanation, washable, durable, characteristics such as the mosquito rate of knockdown high, pesticide drug action time length that the dacron polyester screen cloth with function of driving mosquitoes of the present invention has.
Claims (7)
1. terylene desinsection lining production technology comprises:
Generate the wet section of terylene particle, utilize the wet section of terylene particle to generate terylene and do section;
Utilize terylene to do section and generate the pastille terylene thread, the weaving of pastille terylene thread is generated terylene desinsection lining.
2. terylene desinsection lining production technology as claimed in claim 1; It is characterized in that; The step that generates the wet section of pastille terylene particle comprises: according to the 1:1 ratio; Utilize phthalic acid and ethylene glycol to generate PETP, utilize said PETP to generate PET, said PET generates the wet section of terylene after Cast Strip, cooling, drying, pelletizing.
3. terylene desinsection lining production technology as claimed in claim 2; It is characterized in that; The step that generates the dried section of terylene comprises: in wet chip bunker; The wet section of said terylene particle through screening, deironing, pulse carry, crystallization in advance, dry back generate terylene and do section, said terylene is done to cut into slices sends into dried chip bunker; Said preparatory crystallization adopts about 120～170 ℃ hot-air to the section heating; Said dry run comprises: the dry air that drops to below-20 ℃ through dehumidification processing dew point is heated to about 160 ℃; Bottom drying tower, be transported to the drying tower and make the section dehydration with reverse contact of section; Dry air is taken moisture out of from the drying tower top, generate terylene and do section.
4. terylene desinsection lining production technology as claimed in claim 3 is characterized in that, the step that generates the pastille terylene thread comprises: said terylene is done section and is sent into static mixer after filtering; In static mixer, add pesticide; Said terylene is sent into screw extruder after doing section and pesticide mixing, and in screw extruder, said terylene is done section and pesticide fusion; Melt is admitted to spinning head; Said melt forms the melt thread after coming out from spinning head, after the lateral blowing cooling, forms pastille and solidifies strand, generation pastille terylene thread after the warping; Temperature in the said screw extruder is at 270 ℃ to 300 ℃.
5. like each described terylene desinsection lining production technology of claim 1 to 4; It is characterized in that: said pesticide is chosen alphamethrin, cyfloxylate, cypermethrin, decis, ether chrysanthemum ester, Cyhalothrin, chlorine ether-ether, allethrin, rich d-allethrin or methothrin, and adding proportion is 1～30g/kg of gross mass.
6. like each described terylene desinsection lining production technology of claim 1 to 4, it is characterized in that it is between the 1-16% that pesticide accounts for raw material gross mass percentage.
7. terylene desinsection lining production technology as claimed in claim 6 is characterized in that, weaving adopt interweave, tatting or plain weave mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259592XA CN102817099A (en) | 2012-07-25 | 2012-07-25 | Production process for terylene insecticidal fabric |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259592XA CN102817099A (en) | 2012-07-25 | 2012-07-25 | Production process for terylene insecticidal fabric |
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| CN102817099A true CN102817099A (en) | 2012-12-12 |
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| CN201210259592XA Pending CN102817099A (en) | 2012-07-25 | 2012-07-25 | Production process for terylene insecticidal fabric |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115951A (en) * | 2011-03-10 | 2011-07-06 | 江门市大自然纺织品有限公司 | Manufacturing method of long-acting mosquito-expelling textile |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115951A (en) * | 2011-03-10 | 2011-07-06 | 江门市大自然纺织品有限公司 | Manufacturing method of long-acting mosquito-expelling textile |
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