CN101457428B - Method for improving crude fiber and fine fiber blended strength - Google Patents
Method for improving crude fiber and fine fiber blended strength Download PDFInfo
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- CN101457428B CN101457428B CN2008101792341A CN200810179234A CN101457428B CN 101457428 B CN101457428 B CN 101457428B CN 2008101792341 A CN2008101792341 A CN 2008101792341A CN 200810179234 A CN200810179234 A CN 200810179234A CN 101457428 B CN101457428 B CN 101457428B
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- 238000000034 method Methods 0.000 title claims abstract description 21
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- 229920000742 Cotton Polymers 0.000 claims description 70
- 239000004743 Polypropylene Substances 0.000 claims description 25
- 229920001155 polypropylene Polymers 0.000 claims description 25
- -1 polypropylene Polymers 0.000 claims description 23
- 238000009987 spinning Methods 0.000 abstract description 12
- 239000000203 mixture Substances 0.000 abstract description 11
- 240000000491 Corchorus aestuans Species 0.000 description 51
- 235000011777 Corchorus aestuans Nutrition 0.000 description 51
- 235000010862 Corchorus capsularis Nutrition 0.000 description 51
- 241000219146 Gossypium Species 0.000 description 40
- 240000008564 Boehmeria nivea Species 0.000 description 13
- 241000208202 Linaceae Species 0.000 description 10
- 235000004431 Linum usitatissimum Nutrition 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920004934 Dacron® Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- 239000004753 textile Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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Abstract
The invention relates to a method for improving the strength of a rough fiber/fine fiber blended yarn, and at least another one type of intermediate fiber with the fineness which is between the fineness of rough fiber and fine fiber is added during the blending of the rough fiber and the fine fiber. The spinning method improves the breaking strength of the blended yarn by adding at least another one type of the intermediate fiber with the fineness which is between the fineness of the rough fiber and the fine fiber in the fiber mixture. As the intermediate fiber has small differences with the rough fiber and the fine fiber in fineness and hardness, the intermediate fiber can be well cohered during the spinning process, thereby being capable of improving the breaking strength of the blended yarn. If the intermediate fiber with one fineness is added, the intermediate fiber can be cohered with the rough fiber and can also be cohered with the fine fiber; if various types of the intermediate fibers with different finenesses are added, the various types of the intermediate fibers can also be well cohered together, so that the various types of the fiber can be cohered and wound together in blending and the breaking strength of the blended yarn can be further well enhanced.
Description
Technical field
The present invention relates to a kind of method of spinning, specifically relate to a kind of method thick, the fine fibre blended strength that improves.
Background technology
Blending has become one of development trend of lining, the mode and the method for blending are varied, for example natural fibre blended, get involved functional fibre blending, chemical fibre and natural fibre blended or the like, being difficult to directly distinguish a lining composition is cotton, hair, fiber crops, silk or chemical fibre, the diversification of textile raw material makes them, and you are among us and we are among you.The common blended yarn in existing market has cotton/wash blended yarn, cotton/flax blended spinning, cotton/ramie blending yarn, wool/viscose blended yarn etc., the fineness of two kinds of fibrous raw materials of above-mentioned several blended yarns is approaching, the gap of the fineness metric count of two kinds of fibers is no more than 5 times, be more or less the same, two kinds of fibers after the twisting can be good at obvolvent together, the obvolvent of two kinds of fibers is good, and the yarn strength that blending is come out is better.But when the fibrous raw material that adopts two kinds of thicknesses to differ greatly comes blended yarn, for example when tossa and cotton fiber blending, because both thickness, soft or hard degree difference are very big, the degree of thicker fiber bending is less in spinning process, thinner fiber can be wrapped in thicker fiber around, crooked degree is bigger, rather than as both mutual obvolvents during blending between the close fiber of thickness, cohesive force between two kinds of fibers that cause carefully, slightly differ greatly is less, the blended yarn that spins out is easy to fracture, and yarn strength is lower.
Summary of the invention
Be difficult to obvolvent during thick, fine fibre blending that the present invention solves prior art, be intertwined, the blended yarn cohesive force that obtains is little, the problem of powerful difference, invent a kind ofly improve slightly, the method for fine fibre blended strength.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind ofly improve method thick, the fine fibre blended strength, when thick, fine fibre blending, add the median fiber of another kind of at least fineness between described thick, fine fibre.
Described median fiber accounts for the 5-40wt% of all fibres total amount.
Described median fiber accounts for the 10-35wt% of all fibres total amount.
Described median fiber accounts for the 20-30wt% of all fibres total amount.
The metric count of described fine fibre fineness (Nm) surpasses 5 times of metric count (Nm) of described coarse-fibred fineness, any two kinds of fibers that fineness is closed in all fibres of blending, wherein the fineness metric count (Nm) of the fiber that fineness metric count (Nm) is bigger is no more than 5 times of the less fibre fineness metric count (Nm) of fineness metric count (Nm).
Described median fiber is one or both.
Described crude fibre is a tossa, and described fine fibre is a cotton fiber.Described median fiber is linen fibre or ramee or polyster fibre.
The present invention has the following advantages:
Because in the fiber of using always in the spinning, crude fibre is bigger than the rigidity of fine fibre, that is to say generally, thicker fiber stiffness is bigger, and the rigidity of thinner fiber is less, so it is thick, when thin two kinds of fibre finenesses differ big, crude fibre in blending is because rigidity is bigger, be not easy to bend, distortion, and fine fibre rigidity is little, comparatively soft, very easily bend, distortion, therefore can appear at fiber thinner in the spinning process can be wrapped in thicker fiber around, rather than as both mutual obvolvents during blending between the close fiber of thickness, cause thin, cohesive force between two kinds of fibers that slightly differ greatly is less, and the blended yarn that spins out is easy to fracture, and yarn strength is lower.Raising of the present invention is thick, the method for fine fibre blended strength, by in mixed with fibers, adding the median fiber of another kind of at least fineness fiber between described thick, thin two kinds of fibers, because median fiber all differs little with thick, the thickness of fine fibre, soft or hard degree, therefore can obvolvent well in the spinning process, can improve the ultimate strength of blended yarn.The described median fiber that adds is if a kind of, then median fiber both can with the crude fibre obvolvent, again can with the fine fibre obvolvent; If median fiber is multiple, also can well obvolvent between the so various median fibers together, so just make various fibers in the blending can obvolvent, be intertwined, thereby well strengthened the ultimate strength of blended yarn.
The addition of increase median fiber can improve the cohesive force between the multiple fiber, reduces the characteristic that its addition then can better keep original two kinds of fibers; And be not the linear relationship that is dull between the brute force of the addition of median fiber and blended yarn, because when the median fiber that adds is too much, the ultimate strength of yarn is then main relevant with the spinning characteristic of median fiber itself, and the ultimate strength of blended yarn not necessarily remains along with the increase of median fiber and increases; Comprehensive above various factors, it is proper that the addition of median fiber should be controlled at 5～40wt%.
Huge for thickness difference, such as the difference of fineness metric count at two kinds of fibers more than 25 times, can be by the median fiber of two kinds of addings or two or more different fineness, make the difference of the fineness metric count of any two kinds of fibers of adjacent fineness between the multiple fiber between 2～5 times, so the multiple fiber of different fineness in the blending process just mutually obvolvent together, the yarn strength that spinning comes out is better.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is jute and the obvolvent situation schematic diagram of cotton two kinds of fibers in blending;
Fig. 2 is jute and the obvolvent situation schematic diagram of two kinds of fibers of flax in blending;
Fig. 3 is flax and the obvolvent situation schematic diagram of cotton two kinds of fibers in blending;
Reference numeral is expressed as among the figure: 1-tossa, 2-cotton fiber, 3-linen fibre.
The specific embodiment
Carrying out blending with jute and cotton below is that example illustrates blended yarn of the present invention.
Since tossa through coming unstuck, fibre fineness after the health is at 400～500 (Nm), and the fineness of cotton fiber is about 6000 (Nm), the metric count of cotton fiber fineness (Nm) is 12～15 times of tossa, according to shown in Figure 1, tossa and the cotton fiber flexural deformation degree of tossa in blending is less, and cotton fiber be wrapped in tossa around, the obvolvent of two kinds of fibers that these two kinds of fineness differ greatly is in bad order.At this moment, with length in 27～30 millimeters jute bundle fiber and length when 25～33 millimeters cotton fiber carries out blending, the ultimate strength of 12 (s) yarns of the jute/cotton blending of its different blending rates is as shown in the table:
The ultimate strength of 12 (s) yarns of table 1 jute/cotton blending
| Ratio (wt%) | Ultimate strength (cN) |
| 10/90 | 530.87 |
| 20/80 | 527.65 |
| 30/70 | 520.93 |
| 40/60 | 511.75 |
| 45/55 | 506.78 |
| 50/50 | 499.80 |
| 55/45 | 482.90 |
| 60/40 | 443.27 |
| 70/30 | 389.47 |
| 80/20 | 327.87 |
As can be seen from Table 1, except the ultimate strength of the yarn of two kinds of jute/cotton blending ratios of 10/90 and 20/80 (wt%) more than 520 (cN), all the other are all below 520 (cN), particularly the ultimate strength of the yarn of two kinds of jute/cotton blending ratios of 70/30 and 80/20 (wt%) is below 400 (cN), can draw the lower of yarn breakage brute force that jute and cotton two kinds of fiber blends come out.Embodiment 1 to 3 has provided respectively by fiber that adds another kind of fineness and the embodiment that improves the blended yarn ultimate strength.
Increased length at 27～33 millimeters, the linen fibre of fineness about 1200 (Nm) together carries out mixed with fibers as median fiber and tossa and cotton fiber.The fineness metric count (Nm) of described linen fibre is 2.4～3 times of described tossa fineness metric count (Nm), and the fineness metric count (Nm) of described cotton fiber is about 5 times of described linen fibre, according to Fig. 2 and shown in Figure 3, at this moment because the fineness difference of linen fibre and tossa and cotton fiber is all little, in blending both can with the tossa obvolvent, again can with the cotton fiber obvolvent.The ultimate strength of jute/cotton/12 (s) yarns of flax blending of different blending rates is shown in the following table:
The ultimate strength of table 2 jute/cotton/12 (s) yarns of flax blending
| Ratio (wt%) | Ultimate strength (cN) |
| 20/65/15 | 580.93 |
| 25/50/25 | 629.05 |
| 30/50/20 | 598.15 |
| 30/40/30 | 600.47 |
| 40/45/15 | 587.65 |
| 45/50/5 | 523.87 |
| 50/28/22 | 578.69 |
| 60/30/10 | 533.28 |
| 70/20/10 | 515.35 |
| 80/15/5 | 483.67 |
As can be seen from Table 2, the ultimate strength of yarn of two kinds of jute/cottons/flax blending ratio that except blending ratio is 70/20/10 and 80/15/5 (wt%) is below 520 (cN), all the other all are in more than 520 (cN), and the ultimate strength that has increased the blended yarn of linen fibre is reasonable.
Above two forms are respectively 506.78 and 499.80 and (cN) at the jute/cotton blending rate at the ultimate strength of two kinds of blended yarns of 45/55 and 50/50 (wt%); And increased linen fibre as after the median fiber, jute/cotton/flax blending rate is respectively 587.65 and 523.87 (cN) at the ultimate strength of two kinds of yarns of 40/45/15 and 45/50/5 (wt%), and the ultimate strength of comparing the jute/cotton blended yarn that does not add median fiber is significantly improved.Can be clearly seen that also that in addition the ultimate strength of the jute/cotton blended yarn of other different blending rates also all is lower than the ultimate strength of the identical or approaching jute/cotton/flax blended spinning of jute/cotton blending ratio.From the ultimate strength of the jute/cotton shown in the table 2/12 (s) yarns of flax blending as can be seen, the percentage by weight of linen fibre is that the ultimate strength of jute/cotton/12 (s) yarns of flax blending of 5% o'clock is less than the ultimate strength that percentage by weight is 10% o'clock a blended yarn, and the ultimate strength of the blended yarn when the percentage by weight of linen fibre is 25 and 30 (wt%) has all surpassed 600 (cN), and at this moment the ultimate strength of blended yarn is bigger than the blended yarn of other blending rate.
For the ultimate strength that strengthens jute and cotton fiber mixed yarn also can add length at 27～33 millimeters in jute and cotton fiber, the polyster fibre of fineness in 2000～4500 (Nm) scope together carries out mixed with fibers, and the ultimate strength of 12 yarn of the three kinds of fiber blends of jute/cotton/terylene that mix according to different percentage by weights is as shown in the table.
The ultimate strength of 12 (s) yarns of table 3 jute/cotton/blend polyester
| Ratio (wt%) | Ultimate strength (cN) |
| 20/65/15 | 592.87 |
| 25/50/25 | 647.56 |
| 30/50/20 | 618.93 |
| 30/40/30 | 655.79 |
| 40/45/15 | 587.65 |
| 45/50/5 | 545.98 |
| 50/28/22 | 590.45 |
| 60/30/10 | 535.58 |
| 70/20/10 | 520.67 |
| 80/15/5 | 496.05 |
As can be seen from Table 3, except the ultimate strength of the yarn of a kind of jute/cotton of 80/15/5 (wt%)/blend polyester ratio does not reach 520 (cN), all the other have all surpassed 520 (cN), and the ultimate strength of blended yarn is better; Particularly the ultimate strength of the blended yarn when the percentage by weight of polyster fibre is 20,25 and 30 (wt%) has all surpassed 618 (cN), and at this moment the ultimate strength of blended yarn is bigger than the blended yarn of other blending rate.Comparison sheet 1 and table 3 can obtain, and the ultimate strength of the jute/cotton blended yarn of different blending rates generally is lower than in jute/cotton/dacron blended yarn, the jute/cotton blending ratio identical or near the time the ultimate strength of blended yarn.
For the ultimate strength that strengthens jute and cotton fiber mixed yarn also can add length in the 31-35 millimeter in jute and cotton fiber, the ramee of fineness about 1200 (Nm) carries out mixed with fibers.The ultimate strength of 12 yarn of three kinds of fiber blends that mix according to different percentage by weights is as shown in the table.
The ultimate strength of 12 (s) yarns of table 4 jute/cotton/ramie blending
| Ratio (wt%) | Ultimate strength (cN) |
| 20/65/15 | 589.76 |
| 25/50/25 | 638.03 |
| 30/50/20 | 604.58 |
| 30/40/30 | 623.45 |
| 40/45/15 | 588.56 |
| 45/50/5 | 534.79 |
| 50/28/22 | 579.08 |
| 60/30/10 | 536.98 |
| 70/20/10 | 530.28 |
| 80/15/5 | 500.69 |
As can be seen from Table 4, except the ultimate strength of the yarn of a kind of jute/cotton of 80/15/5 (wt%)/ramie blending ratio does not reach 520 (cN), all the other have all surpassed 520 (cN), and the ultimate strength of blended yarn is better; Particularly the ultimate strength of the blended yarn when the percentage by weight of polyster fibre is 20,25 and 30 (wt%) has all surpassed 600 (cN), the ultimate strength of blended yarn is maximum when the percentage by weight of linen fibre is 25 (wt%), and the percentage by weight of visible median fiber linen fibre is best blending percentage at 20～30 (wt%).Comparison sheet 1 and table 4 can obtain, and the ultimate strength of the jute/cotton blended yarn of different blending rates generally is lower than in jute/cotton/dacron blended yarn, the jute/cotton blending ratio identical or near the time the ultimate strength of blended yarn.
Embodiment 4
Carrying out blending with the polypropylene fiber of fineness metric count about the tossa and 8000 (Nm) of 400～500 (Nm) scope below is that example is done with explanation.Above-mentioned two kinds of fibers, promptly the difference of the fineness metric count (Nm) of tossa and polypropylene fiber has reached 16～18 times, and when these two kinds of fibers carried out blending, the ultimate strength of its blended yarn and the relation of blending ratio were as shown in table 5.
The ultimate strength of table 5 jute/12 (s) yarns of polypropylene fibre blending
| Ratio (wt%) | Ultimate strength (cN) |
| 40/60 | 406.62 |
| 50/50 | 387.57 |
| 55/45 | 377.74 |
| 60/40 | 346.84 |
As can be seen from Table 5, because the obvolvent of described jute, two kinds of fibers of polypropylene fibre is in bad order, the ultimate strength of the jute of various blending ratios/12 (s) yarns of polypropylene fibre blending is all lower.
In above-mentioned jute, two kinds of fibers of polypropylene fibre, add fineness metric count (Nm) at cotton fiber about 6000 and fineness metric count (Nm) ramee about 1200, and above-mentioned four kinds of fibers are mixed and then spun yarn.It is as shown in table 6 that the fiber of these four kinds of different fineness carries out the ultimate strength of blended yarn of the different blending ratios that blending obtains.
The ultimate strength of table 6 jute/ramie/cotton/12 (s) yarns of polypropylene fibre blending
| Ratio (wt%) | Ultimate strength (cN) |
| 40/10/10/40 | 586.64 |
| 35/10/15/40 | 607.74 |
| 35/15/15/35 | 568.47 |
| 30/10/10/50 | 571.89 |
| 40/5/10/45 | 520.47 |
| 30/20/10/40 | 560.76 |
Because the fineness metric count (Nm) of described cotton fiber is about 5 times of described ramee fineness metric count (Nm), described polypropylene fiber fineness metric count of while (Nm) is again about 1.25 times of described cotton fiber, and the fineness difference of described cotton fiber and described ramee and described polypropylene fiber is all little; Equally, because described THE FINENESS OF THE RAMIE FIBRE metric count (Nm) is 2.4～3 times of described tossa, the fineness difference of these two kinds of fibers is also little.So the difference of the fineness metric count (Nm) between the approaching any two kinds of fibers of the fineness of above-mentioned jute, ramie, cotton and four kinds of fibers of polypropylene fibre is all below 5 times, obvolvent that can be good between described four kinds of fibers.As can be seen from Table 6, under different blending ratios, the fiber of described four kinds of different fineness carries out blending, the ultimate strength of the yarn that spins out all when not adding two kinds of median fibers of described ramee and cotton fiber, the ultimate strength of the blended yarn that two kinds of fiber blends of described jute and polypropylene fibre obtain.When particularly the percentage by weight that adds at ramie and cotton fiber was at 20～30 (wt%), the ultimate strength of jute/ramie/cotton/polypropylene fibre blended yarn had all surpassed 560 (cN), and blended yarn is not easy to rupture.
Embodiment 5
Carrying out blending with the polypropylene fiber of fineness metric count about the tossa and 12500 (Nm) of 400～500 (Nm) scope below is that example is done with explanation.Above-mentioned two kinds of fibers, promptly the difference of the fineness metric count (Nm) of tossa and polypropylene fiber has surpassed 25 times, and when these two kinds of fibers carried out blending, the ultimate strength of its blended yarn and the relation of blending ratio were as shown in table 7.
The ultimate strength of table 7 jute/12 (s) yarns of polypropylene fibre blending
| Ratio (wt%) | Ultimate strength (cN) |
| 40/60 | 316.65 |
| 50/50 | 297.70 |
| 55/45 | 288.80 |
| 60/40 | 247.57 |
As can be seen from Table 7, because the obvolvent of described jute, two kinds of fibers of polypropylene fibre is in bad order, the ultimate strength of the jute of various blending ratios/12 (s) yarns of polypropylene fibre blending is all very low.
In above-mentioned jute, two kinds of fibers of polypropylene fibre, add fineness metric count (Nm) at cotton fiber about 6000 and fineness metric count (Nm) ramee about 1200, and above-mentioned four kinds of fibers are mixed and then spun yarn.It is as shown in table 8 that the fiber of these four kinds of different fineness carries out the ultimate strength of blended yarn of the different blending ratios that blending obtains.
The ultimate strength of table 8 jute/ramie/cotton/12 (s) yarns of polypropylene fibre blending
| Ratio (wt%) | Ultimate strength (cN) |
| 40/10/10/40 | 580.70 |
| 35/10/15/40 | 617.70 |
| 35/15/15/35 | 588.80 |
| 30/10/10/50 | 591.57 |
| 40/5/10/45 | 540.45 |
| 30/20/10/40 | 596.65 |
Because the fineness metric count (Nm) of described cotton fiber is about 5 times of described ramee fineness metric count (Nm), described polypropylene fiber fineness metric count of while (Nm) is again about 2.1 times of described cotton fiber, and the fineness difference of described cotton fiber and described ramee and described polypropylene fiber is all little; Equally, because described THE FINENESS OF THE RAMIE FIBRE metric count (Nm) is 2.4～3 times of described tossa, the fineness difference of these two kinds of fibers is also little.So the difference of the fineness metric count (Nm) between the approaching any two kinds of fibers of the fineness of above-mentioned jute, ramie, cotton and four kinds of fibers of polypropylene fibre is all below 5 times, obvolvent that can be good between described four kinds of fibers.As can be seen from Table 8, under different blending ratios, the fiber of described four kinds of different fineness carries out blending, the ultimate strength of the yarn that spins out all when not adding two kinds of median fibers of described ramee and cotton fiber, the ultimate strength of the blended yarn that two kinds of fiber blends of described jute and polypropylene fibre obtain.When particularly the percentage by weight that adds at ramie and cotton fiber was at 20～30 (wt%), the ultimate strength of jute/ramie/cotton/polypropylene fibre blended yarn had all surpassed 580 (cN), and blended yarn is not easy to rupture.
In other embodiments, the median fiber of adding also can be two or more fibers, carries out mixed with fibers with thick, thin two kinds of fibers; The selection of spun yarn also can be other natural fiber or artificial fibre, as long as its fineness is in slightly, between thin two kinds of fibers, make obvolvent good between the various fibers by adding this median fiber, improve the ultimate strength of blended yarn, or, when slightly, when thin two kinds of bigger fibers of degree difference carry out blending, the yarn that spinning comes out powerful very poor, so not accommodating, the fiber that fineness differs greatly do not carry out blending, but use blending method of the present invention and can carry out blending being unsuitable for the fiber that blending two kinds of thicknesses together differ greatly, obtain blended yarn, can realize goal of the invention of the present invention.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of claims of the invention.
Claims (9)
1. one kind is improved method thick, the fine fibre blended strength, it is characterized in that, when thick, fine fibre blending, add the median fiber of another kind of at least fineness between described thick, fine fibre, the metric count of described fine fibre fineness (Nm) surpasses 5 times of metric count (Nm) of described coarse-fibred fineness, any two kinds of fibers that fineness is closed in all fibres of blending, wherein the fineness metric count (Nm) of the fiber that fineness metric count (Nm) is bigger is no more than 5 times of the less fibre fineness metric count (Nm) of fineness metric count (Nm).
2. method according to claim 1 is characterized in that described median fiber accounts for the 5-40wt% of all fibres total amount.
3. method according to claim 2 is characterized in that described median fiber accounts for the 10-35wt% of all fibres total amount.
4. method according to claim 3 is characterized in that described median fiber accounts for the 20-30wt% of all fibres total amount.
5. according to the described method of the arbitrary claim of claim 1 to 4, it is characterized in that described median fiber is one or both.
6. method according to claim 5 is characterized in that, described crude fibre is a tossa, and described fine fibre is a cotton fiber.
7. method according to claim 6 is characterized in that, described median fiber is linen fibre or ramee or polyster fibre.
8. method according to claim 1 is characterized in that, the metric count of described fine fibre fineness (Nm) surpasses 25 times of metric count (Nm) of described coarse-fibred fineness, and described median fiber is two kinds or two or more.
9. method according to claim 8 is characterized in that, described crude fibre is a tossa, and described fine fibre is a polypropylene fiber, and described median fiber is ramee and cotton fiber.
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