CN105002633A - Poly-L-lactic acid tea bag mesh and preparation method thereof - Google Patents
Poly-L-lactic acid tea bag mesh and preparation method thereof Download PDFInfo
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- CN105002633A CN105002633A CN201510540329.1A CN201510540329A CN105002633A CN 105002633 A CN105002633 A CN 105002633A CN 201510540329 A CN201510540329 A CN 201510540329A CN 105002633 A CN105002633 A CN 105002633A
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Abstract
The invention relates to a poly-L-lactic acid tea bag mesh and a preparation method thereof, in particular to a poly-L-lactic acid tea bag mesh, wherein the poly-L-lactic acid tea bag mesh is prepared from the following steps: (1) meshing poly-L-lactic acid monofilaments; and (2) shaping the meshed poly-L-lactic acid monofilaments at the temperature of 100 DEG C to 120 DEG C; the number of radial filaments of the tea bag mesh is 35 to 45/cm, the number of weft filaments of the tea bag mesh is 30 to 40/cm, and the aperture ratio is 60% to 70%. The preparation method comprises the following steps: taking poly-L-lactic acid slices as a raw material to spin, thus obtaining poly-L-lactic acid monofilaments of which the size is between 20 to 30D; the poly-L-lactic acid monofilaments are prepared into the poly-L-lactic acid tea bag mesh through warping, meshing, shaping hot melting and slitting. The poly-L-lactic acid tea bag mesh is degradable, has good water permeability, advanced texture, and is mainly used for preparing a bagged tea bag with a triangle package or a quadrangle package.
Description
Technical field
The tea bubble bag that the present invention relates to the Poly-L-lactide tea bag mesh sheet for receiving the tealeaves such as green tea, black tea or oolong tea, its preparation method and prepare by described mesh sheet; Concrete, the present invention relates to and prepare tea bag mesh sheet and tea bubble bag with Poly-L-lactide monofilament.
Background technology
Tealeaves is as a kind of health drink, very popular.The tea bubble bag using hot water to extract green tea, black tea etc. does pouch to use with water permeable membrane such as non-weaving cloth, paper, braided fabrics, particularly extractibility well and the tea bag bag having the nylon fabrics of feeling of high class to make more liked by masses.But, because nylon fabrics is petroleum chemicals, almost cannot degrade at nature.
Therefore, be badly in need of at present a kind of can natural degradation, the tea bubble bag product in non-petrochemical industry source.
Summary of the invention
Technical purpose of the present invention is to provide the biodegradable fiber of a kind of use to prepare tea bubble bag.The present invention manufactures Poly-L-lactide tea bag mesh sheet and has enough strength of filaments, and tea bag mesh sheet or tea bubble bag product adjacent spacing of radial filament two in hot water or boiling water spacing adjacent with weft fiber silk two keep stable, without significant change.
Inventor finds through long-term research, adopt the lactic acid prepared with starch for raw material, Poly-L-lactide monofilament can be obtained through spinning after polymerization, then, steep bag by this Poly-L-lactide monofilament manufacture for the Poly-L-lactide tea bag mesh sheet and tea of receiving the tealeaves such as green tea, black tea or oolong tea; This tea bag mesh sheet and tea bubble bag belong to complete natural circulation type all, have biological degradability.Tea bag mesh sheet of the present invention and tea bubble bag do not use the industrial chemicals such as oil completely, and, under the microbial action of its discarded object in soil and seawater, be decomposed into carbon dioxide and water, can not earth environment be polluted.
As known to persons of ordinary skill in the art, PLA comprises poly-d-lactic acid (PDLA), poly (l-lactic acid) (PLLA) and poly-dL-lactic acid (PDLLA) etc.Studying for a long period of time through inventor, inventor surprisingly finds to adopt poly (l-lactic acid) (PLLA) section to spin monofilament, and tea bubble bag obtained thus has excellent tea bubble bag desired properties.
On the one hand, the invention provides a kind of Poly-L-lactide tea bag mesh sheet, wherein, described tea bag mesh sheet is obtained by following steps:
(1) with Poly-L-lactide section for raw material carries out spinning, obtained Poly-L-lactide monofilament;
(2) Poly-L-lactide monofilament is carried out knitmesh; With
(3) shape at the temperature of 100 DEG C-120 DEG C;
Wherein, the radial fiber silk of described tea bag mesh sheet is 35 ~ 45 pieces/centimetre, and weft fiber silk is 30 ~ 40 pieces/centimetre, and aperture opening ratio is 60% ~ 70%; And
The adjacent spacing of radial fiber silk two spacing adjacent with weft fiber silk two of described tea bag mesh sheet keeps substantially constant in hot water or boiling water.
In one embodiment of the present invention, the fiber number of described Poly-L-lactide monofilament is 20 ~ 30D, and ultimate strength >=3.0cN/D and/or elongation at break are 18% ~ 30%.
In one embodiment of the present invention, the hot water shrinkage of described tea bag mesh sheet is less than 1%.
On the other hand, the invention provides a kind of preparation method of Poly-L-lactide tea bag mesh sheet, described method comprises:
(1) Poly-L-lactide monofilament is carried out knitmesh; With
(2) shape at the temperature of 100 DEG C-120 DEG C; Obtained Poly-L-lactide tea bag mesh sheet thus.
In a preferred embodiment, described Poly-L-lactide monofilament with Poly-L-lactide section for raw material carries out spinning.
In one embodiment of the present invention, the preparation method of described Poly-L-lactide tea bag mesh sheet also comprises:
(1) before knitmesh, Poly-L-lactide monofilament is carried out warping; With
(2) after sizing, carry out hot melt to cut.
In one embodiment of the present invention, described spinning is carried out under the following conditions:
(1) spinning temperature is 210 ~ 220 DEG C; And
(2) drafting multiple is 4.5 ~ 5.5 times.
In the present invention, the fiber number of the Poly-L-lactide monofilament using described method to obtain is 20 ~ 30D, and ultimate strength >=3.0cN/D and elongation at break are 18% ~ 30%.
In one embodiment of the present invention, carry out melt spinning after drying process is carried out in described Poly-L-lactide section: crystallization temperature controls between 100 ~ 110 DEG C, and baking temperature controls between 110 ~ 130 DEG C.
In one embodiment of the present invention, described spinning is carried out under the following conditions: cooling zone is set as 35 ~ 45 DEG C, and screw rod each district temperature controls at 200 ~ 215 DEG C, and biphenyl heating gas phase temperature controls at 205 ~ 220 DEG C; Preferably, pre-front pressure is between 5 ~ 10Mpa.
In one embodiment of the present invention, the reed that described knitmesh is selected is 32.5# ~ 42.5#, and filling density is 28.5 pieces/centimetre ~ 38.5 pieces/centimetre.
In one embodiment of the present invention, described sizing is carried out in the following manner:
(1) optional employing 2 ultrasonic heat water tanks carry out prerinse to tea bag mesh sheet surface finish;
(2) optionally through 1 distilled water boiler and 1 distilled water cold water storage cistern, tea bag mesh sheet to be cleaned;
(3) through design temperature be the setting machine of 100-120 DEG C, tea bag mesh sheet is shaped.
In the present invention, term " lactic acid " ferments and produces from the renewable natural materials such as corn, be one in recent years people extremely pay close attention to and develop organic acid faster.The formal name used at school of lactic acid is 2 monohydroxy propionic acid, has an asymmetric carbon atom in molecule, there is dextrorotation (D) lactic acid and the corresponding isomers of left-handed (L) lactic acid two kinds of optically-actives.
In the present invention, term " Poly-L-lactide section " refers to Poly-L-lactide (PLLD) section be polymerized by left-handed (L) lactic acid monomer, usual purchased from American NatureWorks company.Its main physical property is a kind of polymer of fully biodegradable, and catabolite is carbon dioxide and water, can not produce pollute environment, and wide material sources.
In the present invention, term " radial fiber silk " refers in fabric production process, and the filament produced by warp beam, with reel wire length direction.
In the present invention, term " weft fiber silk " refers to the filament vertical with radial fiber silk, with reel wire fabric width direction.Term " aperture opening ratio " refers to the percentage of fabric face projection mesopore area and the gross area.
In the present invention, after term " hot water shrinkage " refers to that a finished product tea bag net is placed on and boils 30min in boiling water, the percentage boiling anterior-posterior length difference of net, embody product and put maintenance mesh size stability in the hot water, detection method be measure net boil anterior-posterior length, and calculate the percentage of length difference, be also shrinkage factor.
In the present invention, term " spinning temperature " refers in spinning process, heating-up temperature in screw extruder.
In the present invention, term " drafting multiple " refers to that fiber is in spinning process, is imported by long filament in drawing-off dish, and the velocity ratio of two groups of different drawing-off dishes of speed, makes product obtain the good degree of orientation, degree of crystallinity, thus obtain brute force and the percentage elongation of technique.
In the present invention, term " fiber number " refers to fiber thickness, and wherein, D (DENIER) is one of unit representing fiber thickness, refers to the weight grams of 9000 meters of length fiber; Its metering system measures 90 meters of nominal fiber length with thread yarn horizontal metroscope and weigh its gram weight in the balance, then be converted into the gram weight of 9000 meters of fibre lengths.
In the present invention, term " ultimate strength " refers under prescribed conditions, stretches to monofilament, numerical value during record fracture, then is product ultimate strength divided by the fiber number of product, and wherein, unit is cN/D (li ox/dawn); Its measuring method is with the long fiber of strength of filament machine test 500mm, at the uniform velocity stretches with the speed of 500mm/min, maximum during record fracture; Term " elongation at break " refers to the percentage of fibrous fracture anterior-posterior length difference, and measuring method measures the length before and after fibrous fracture, and calculate the percentage of length difference, is also percentage elongation.
Carry out in drying process in Poly-L-lactide section of the present invention, term " crystallization temperature " refers to that caking affects spinning in order to prevent section from occurring in drying box, so section needs first to carry out crystallization treatment before entering drying box, remove the moisture content of slice surface and inside with hot blast, hot blast temperature is now crystallization temperature.
Specifically, the invention provides a kind of Poly-L-lactide tea bag mesh sheet, described mesh sheet is by following steps or only obtained by following steps:
(1) carry out drying process to the Poly-L-lactide section as raw material, preferably, crystallization temperature controls between 100 ~ 110 DEG C, and baking temperature controls between 110 ~ 130 DEG C;
(2) spinning is carried out in dried Poly-L-lactide section, obtained Poly-L-lactide monofilament; Preferably, obtained Poly-L-lactide monofilament is carried out warping;
(3) Poly-L-lactide monofilament is carried out knitmesh;
(4) shape at the temperature of 100 DEG C-120 DEG C; With
(5) carry out hot melt to cut, obtained Poly-L-lactide tea bag mesh sheet;
Wherein, the radial fiber silk of described tea bag mesh sheet is 35 ~ 45 pieces/centimetre, and weft fiber silk is 30 ~ 40 pieces/centimetre, and aperture opening ratio is 60% ~ 70%.In the present invention, described tea bag mesh sheet or tea obtained thus bubble bag product keep silk spacing to stablize in hot water or boiling water, that is, the adjacent spacing of radial fiber silk two spacing adjacent with weft fiber silk two is substantially constant.In a preferred embodiment, the hot water shrinkage of described tea bag mesh sheet is less than 1%.In a preferred embodiment, the fiber number of Poly-L-lactide monofilament of the present invention is 20 ~ 30D, and ultimate strength >=3.0cN/D and elongation at break are 18% ~ 30%.
The present invention also provides the preparation method of described Poly-L-lactide tea bag mesh sheet, comprises or is made up of following steps:
(1) carry out drying process to the Poly-L-lactide section as raw material, preferably, crystallization temperature controls between 100 ~ 110 DEG C, and baking temperature controls between 110 ~ 130 DEG C;
(2) spinning is carried out in dried Poly-L-lactide section, obtained Poly-L-lactide monofilament; Preferably, obtained Poly-L-lactide monofilament is carried out warping;
(3) Poly-L-lactide monofilament is carried out knitmesh;
(4) shape at the temperature of 100 DEG C-120 DEG C; With
(5) carry out hot melt to cut, obtained Poly-L-lactide tea bag mesh sheet.
In the present invention, described spinning condition is as follows:
(1) spinning temperature is 210 ~ 220 DEG C; With
(2) drafting multiple is 4.5 ~ 5.5 times.
In one embodiment, the fiber number of gained Poly-L-lactide monofilament is 20 ~ 30D, and ultimate strength >=3.0cN/D and/or elongation at break are 18% ~ 30%.
In the present invention, described spinning is carried out under following appointed condition: cooling zone is set as 35 ~ 45 DEG C, and screw rod each district temperature controls at 200 ~ 215 DEG C, and biphenyl heating gas phase temperature controls at 205 ~ 220 DEG C; Preferably, pre-front pressure is between 5 ~ 10Mpa.
In the present invention, described sizing can be carried out in the following manner:
(1) 2 ultrasonic heat water tanks are adopted to carry out prerinse to tea bag mesh sheet surface finish;
(2) through 1 distilled water boiler and 1 distilled water cold water storage cistern, tea bag mesh sheet is cleaned; With
(3) through design temperature be the setting machine of 100-120 DEG C, tea bag mesh sheet is shaped.
The invention provides that a kind of grid is even, aperture is tiny and the tea bag mesh sheet of natural degradable, this tea bag mesh sheet is with PLA Poly-L-lactide for raw material, and nontoxic pollution-free, environmental protection are renewable, have biological degradability.
In the present invention, the preparation method of Poly-L-lactide tea bag mesh sheet comprises: with Poly-L-lactide section for raw material carries out spinning, obtains fineness Poly-L-lactide monofilament between 20 ~ 30D; Again Poly-L-lactide monofilament is produced into Poly-L-lactide tea bag mesh sheet by warping, knitmesh, sizing, the hot melt method such as to cut.The radial fiber silk of this tea bag mesh sheet is 35 ~ 45 pieces/centimetre, and weft fiber silk is 30 ~ 40 pieces/centimetre, and aperture opening ratio is between 60% ~ 70%.
In the present invention, the Poly-L-lactide monofilament of Poly-L-lactide tea bag mesh sheet adopts melt-spinning technology to obtain, and its main production parameter is: spinning temperature is 210 ~ 220 DEG C, and drafting multiple is 4.5 ~ 5.5 times.Obtain the basic physical properties of Poly-L-lactide monofilament: ultimate strength >=3.0cN/D, elongation at break 18% ~ 30%.
In an embodiment of the invention, Poly-L-lactide section just can carry out melt spinning after having to pass through dry process.After Poly-L-lactide chip drying, the control of moisture content and dry slicing characteristics viscosity is particularly important, because the loss of molecular weight that the improper meeting of moisture control causes, will bring difficulty to normal melt spinning.The drying condition be suitable for is: crystallization temperature controls between 100 ~ 110 DEG C, and section is through pulsation valve plate and the air-flow of crystallization hot blast circulation canal that separates between two; Again by aluminum oxide molecular sieve moisture eliminator and jacket type closed type hot air oxygen detrition; Due to its fusing point and vitrification point lower, baking temperature can be controlled between 110 ~ 130 DEG C, is not less than 6 hours drying time, to realize dew-point temperature 60 DEG C.
In an embodiment of the invention, because the heat endurance of Poly-L-lactide polymer is poor, for avoiding relatively large polymer thermal degradation, when ensureing that melt rheological property is good, need the spinning temperature that setting is lower.Cooling zone is set as 35 ~ 45 DEG C, and screw rod each district temperature controls at 200 ~ 215 DEG C, and biphenyl heating gas phase temperature controls 205 ~ 220 DEG C (for ease of low temperature control, must use lower boiling biphenyl).
In an embodiment of the invention, ensureing under the prerequisite that all pressure and fiber are evenly extruded, before pre-, pressure is arranged between 5 ~ 10Mpa, to reduce the backflow of melt in screw rod, thus reduce the time of staying of melt in high-temperature region, reduce the degree of melt thermal degradation, and then ensure that fibrous finished product quality particularly prevents the decline of fracture strength index.
In an embodiment of the invention, the preparation method of described Poly-L-lactide tea bag mesh sheet comprises warping, knitmesh, sizing, hot melt cut.
In an embodiment of the invention, select reed to be 27.5# ~ 57.5# in knitmesh process, filling density is 22.5 pieces/centimetre ~ 57.5 pieces/centimetre; Preferably, reed is 32.5# ~ 42.5#, and filling density is 28.5 pieces/centimetre ~ 38.5 pieces/centimetre; Preferred further, reed is 37.5#, and filling density is 33.5 pieces/centimetre.Thus, ensure that product warp-wise density is at 35 ~ 45 pieces/centimetre, latitudinal density is at 30 ~ 35 pieces/centimetre.In the present invention, if tea bag mesh sheet density is too high, tea bag bag water permeability can be caused to reduce, affect mouthfeel.If tea bag mesh sheet density is too low, mesh can be caused too large and the possibility that tealeaves had spill.
Of the present invention one preferred embodiment in, in order to the boiling water stability that keeps tea bag mesh sheet good and the spinning oil removed in tea bag mesh sheet, the present invention adopts and first carries out prerinse with 2 ultrasonic heat water tanks to tea bag net surface finish, through 1 distilled water boiler and 1 distilled water cold water storage cistern, wire side is cleaned again, remove finish and the wire side floating dust of spinning.Again through high-temperature forming machine, carry out high-temperature shaping to tea bag mesh sheet, the tea bag mesh sheet percent thermal shrinkage through sizing is reduced within 1%, keeps product mesh size in boiling water to stablize, increases wire side stiffness simultaneously, facilitate follow-up tealeaves to pack and process.
Of the present invention one preferred embodiment in, tea bag mesh sheet adopt hot melt cut, the two side ends limit hot melt adhesive separately after tea bag mesh sheet is cut, prevents filoselle.
Detailed description of the invention
With reference now to the specific embodiment of the present invention and the experimental result that provides support for this embodiment.But applicant points out that following is openly only illustration purpose, has no intention to limit claimed subject area by any way.
Embodiment 1
(1) the tea bag net preparation of Poly-L-lactide monofilament
Before melt spinning, Poly-L-lactide section must through super-dry process, and crystallization temperature controls at about 105 DEG C, and section is through pulsation valve plate and the air-flow of crystallization hot blast circulation canal that separates between two; Again by aluminum oxide molecular sieve moisture eliminator and jacket type closed type hot air oxygen detrition, baking temperature can be controlled in about 120 DEG C, 6 hours ~ 7 hours drying time, realizes dew-point temperature 60 DEG C.
In this embodiment, during spinning, screw rod each district temperature controls at 205 ~ 212 DEG C, and biphenyl heating gas phase temperature controls 210 ~ 213 DEG C (for ease of low temperature control, must use low boiling biphenyl)
Before pre-, pressure is set to 7.5Mpa, drafting multiple preferably 5.0 ~ 5.5 times, preferably 5.2 times further, in order to keep feel (flexibility) that tea bag bag is good and product planarization, product filament number preferably 20 ~ 30D, and preferred 25D further.
The Poly-L-lactide monofilament basic physical properties obtained is: ultimate strength >=3.0cN/D, elongation at break 18% ~ 30%.
(2) preparation of Poly-L-lactide tea bag mesh sheet
1. warping knitmesh: select reed to be 37.5# in knitmesh process, filling density is 33.5 pieces/centimetre.Ensure that product warp-wise density is at 39 pieces/centimetre, latitudinal density is at 35 pieces/centimetre.
2. sizing is cleaned: in order to cleaning fabric remained on surface spinning oil and other impurity, have employed washing, sizing carries out process simultaneously, 2 ultrasonic heat water tanks are first adopted to carry out prerinse to tea bag net surface finish before sizing, through 1 distilled water boiler and 1 distilled water cold water storage cistern, wire side is cleaned again, remove finish and other impurity of wire side of spinning, open wide hot-air setting machine by 120 degree again to shape, thus obtain desirable can reaching the hygienic requirements of tea bag net, product mesh size keeps stable tea bubble bag in boiling water.
3. hot melt is cut: bad in order to ensure that point tea bag mesh sheet cut, in follow-up making tealeaves packet procedures, loose limit does not occur, hot cutter must be adopted in cutting process to cut, and set hot cutter temperature and be set to 230 DEG C, the speed of cutting is 18m/min.By actual customer demand, regulate and control suitable product fabric width and bar is rushed to view picture reel wire cut.
4. finished product inspection: after finished product completes, carries out inspection confirm product appearance, color and luster, running situation, finally adopt vacuum packaging.
After testing, the filament number of the Poly-L-lactide tea bag mesh sheet obtained by the present embodiment 1 is 25D, and its density is radial fiber silk is 39 pieces/centimetre, and weft fiber silk is 35 pieces/centimetre.The aperture opening ratio of this tea bag mesh sheet is 66% after tested, ultimate strength >=80N/50mm; And in hot water or boiling water, keeping mesh size to stablize, that is, the adjacent spacing of radial fiber silk two spacing adjacent with weft fiber silk two is substantially constant; In addition, its hot water shrinkage is less than 0.2%; Elongation at break is 22%.
Although the present invention can carry out a large amount of changes, adopt alternative form, show concrete illustrative embodiments in the embodiment above.But should be appreciated that the description of concrete illustrative embodiments is not that scope of the present invention is limited in disclosed particular form, on the contrary, the present invention should comprise all changes in the scope of the invention that appended claims discloses and the equivalent form of value.
Claims (10)
1. a Poly-L-lactide tea bag mesh sheet, wherein, described tea bag mesh sheet is obtained by following steps:
(1) with Poly-L-lactide section for raw material carries out spinning, obtained Poly-L-lactide monofilament;
(2) Poly-L-lactide monofilament is carried out knitmesh; With
(3) shape at the temperature of 100 DEG C-120 DEG C;
Wherein, the radial fiber silk of described tea bag mesh sheet is 35 ~ 45 pieces/centimetre, and weft fiber silk is 30 ~ 40 pieces/centimetre, and aperture opening ratio is 60% ~ 70%; And
The adjacent spacing of radial fiber silk two spacing adjacent with weft fiber silk two of described tea bag mesh sheet keeps substantially constant in hot water or boiling water.
2. Poly-L-lactide tea bag mesh sheet as claimed in claim 1, wherein, the fiber number of described Poly-L-lactide monofilament is 20 ~ 30D, and ultimate strength >=3.0cN/D and/or elongation at break are 18% ~ 30%.
3. Poly-L-lactide tea bag mesh sheet as claimed in claim 1, wherein, the hot water shrinkage of described tea bag mesh sheet is less than 1%.
4. a preparation method for Poly-L-lactide tea bag mesh sheet, described method comprises:
(1) with Poly-L-lactide section for raw material carries out spinning, obtained Poly-L-lactide monofilament;
(2) Poly-L-lactide monofilament is carried out knitmesh; With
(2) shape at the temperature of 100 DEG C-120 DEG C; Obtained Poly-L-lactide tea bag mesh sheet thus.
5. method as claimed in claim 4, it is characterized in that, described method also comprises:
(1) before knitmesh, Poly-L-lactide monofilament is carried out warping; With
(2) after sizing, carry out hot melt to cut.
6. method as claimed in claim 4, is characterized in that, describedly carries out under the following conditions for raw material carries out spinning with Poly-L-lactide section:
(1) spinning temperature is 210 ~ 220 DEG C; With
(2) drafting multiple is 4.5 ~ 5.5 times.
7. method as claimed in claim 4, is characterized in that, before carrying out spinning, drying process is carried out in described Poly-L-lactide section, and wherein, crystallization temperature controls between 100 ~ 110 DEG C, and baking temperature controls between 110 ~ 130 DEG C.
8. method as claimed in claim 4, it is characterized in that, described spinning is carried out under the following conditions: cooling zone is set as 35 ~ 45 DEG C, and screw rod each district temperature controls at 200 ~ 215 DEG C, and biphenyl heating gas phase temperature controls at 205 ~ 220 DEG C; Preferably, pre-front pressure is between 5 ~ 10Mpa.
9. method as claimed in claim 4, it is characterized in that, the reed that described knitmesh is selected is 32.5# ~ 42.5#, and filling density is 28.5 pieces/centimetre ~ 38.5 pieces/centimetre.
10. method as claimed in claim 4, it is characterized in that, described sizing is carried out in the following manner:
(1) 2 ultrasonic heat water tanks are adopted to carry out prerinse to tea bag mesh sheet surface finish;
(2) through 1 distilled water boiler and 1 distilled water cold water storage cistern, tea bag mesh sheet is cleaned; With
(3) through design temperature be the setting machine of 100-120 DEG C, tea bag mesh sheet is shaped.
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| CN201510540329.1A CN105002633A (en) | 2015-08-28 | 2015-08-28 | Poly-L-lactic acid tea bag mesh and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002104506A (en) * | 2000-09-25 | 2002-04-10 | Kanebo Ltd | Tea bag |
| CN1665975A (en) * | 2002-07-01 | 2005-09-07 | 旭化成纤维株式会社 | Nonwoven fabrics and tea package |
| CN101381905A (en) * | 2008-10-17 | 2009-03-11 | 东华大学 | Method for producing low shrink corn modified polylactic acid fibre |
| JP2010254362A (en) * | 2009-04-28 | 2010-11-11 | Yamanaka Sangyo Kk | Method for manufacturing biodegradable water permeable sheet used for extracting container for tea bag or the like |
| CN102006997A (en) * | 2008-04-18 | 2011-04-06 | 大纪商事株式会社 | Fibrous sheet |
| JP2011157118A (en) * | 2010-02-02 | 2011-08-18 | Asahi Kasei Fibers Corp | Filter for food made of biodegradable laminate nonwoven fabric |
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2015
- 2015-08-28 CN CN201510540329.1A patent/CN105002633A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002104506A (en) * | 2000-09-25 | 2002-04-10 | Kanebo Ltd | Tea bag |
| CN1665975A (en) * | 2002-07-01 | 2005-09-07 | 旭化成纤维株式会社 | Nonwoven fabrics and tea package |
| CN102006997A (en) * | 2008-04-18 | 2011-04-06 | 大纪商事株式会社 | Fibrous sheet |
| CN101381905A (en) * | 2008-10-17 | 2009-03-11 | 东华大学 | Method for producing low shrink corn modified polylactic acid fibre |
| JP2010254362A (en) * | 2009-04-28 | 2010-11-11 | Yamanaka Sangyo Kk | Method for manufacturing biodegradable water permeable sheet used for extracting container for tea bag or the like |
| JP2011157118A (en) * | 2010-02-02 | 2011-08-18 | Asahi Kasei Fibers Corp | Filter for food made of biodegradable laminate nonwoven fabric |
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| Title |
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| 刘淑强: "《聚乳酸纤维》", 30 November 2012, 东华大学出版社 * |
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Application publication date: 20151028 |
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