CN113756015A - High-water-absorption environment-friendly non-woven fabric - Google Patents
High-water-absorption environment-friendly non-woven fabric Download PDFInfo
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- CN113756015A CN113756015A CN202110921509.XA CN202110921509A CN113756015A CN 113756015 A CN113756015 A CN 113756015A CN 202110921509 A CN202110921509 A CN 202110921509A CN 113756015 A CN113756015 A CN 113756015A
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 74
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 46
- 239000000835 fiber Substances 0.000 claims abstract description 165
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 64
- 239000004917 carbon fiber Substances 0.000 claims abstract description 64
- 229920000297 Rayon Polymers 0.000 claims abstract description 55
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229920001661 Chitosan Polymers 0.000 claims abstract description 18
- 241000209094 Oryza Species 0.000 claims description 27
- 235000007164 Oryza sativa Nutrition 0.000 claims description 27
- 235000009566 rice Nutrition 0.000 claims description 27
- 239000010903 husk Substances 0.000 claims description 25
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 19
- 239000004626 polylactic acid Substances 0.000 claims description 19
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 17
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 17
- 241001330002 Bambuseae Species 0.000 claims description 17
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 17
- 239000011425 bamboo Substances 0.000 claims description 17
- 239000003610 charcoal Substances 0.000 claims description 17
- 241000196324 Embryophyta Species 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 238000009960 carding Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims description 2
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
- D10B2101/10—Inorganic fibres based on non-oxides other than metals
- D10B2101/12—Carbon; Pitch
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/02—Moisture-responsive characteristics
- D10B2401/022—Moisture-responsive characteristics hydrophylic
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/12—Physical properties biodegradable
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The application relates to the field of non-woven fabrics, more specifically, it relates to a high water absorption environmental protection non-woven fabrics, through combing the fibre into the fibre web, obtain through the acupuncture processing again, wherein, including chitosan fiber, plant-based fibre, viscose fiber and synthetic carbon fiber in the fibre web, chitosan fiber accounts for 33 ~ 50% of the fibre web gross mass, viscose fiber accounts for 15 ~ 20% of the fibre web gross mass, and the mass of synthetic carbon fiber accounts for 20 ~ 25% of the fibre web gross mass. The non-woven fabric prepared by the technical scheme has good strength, good biodegradability and strong water absorbability, meets the requirement of environmental protection, and has good application.
Description
Technical Field
The application relates to the field of non-woven fabrics, in particular to a high-water-absorption environment-friendly non-woven fabric.
Background
The non-woven fabric is a non-woven fabric, and has wide application due to simple processing technology and fast production flow. Nonwoven fabrics are generally formed by carding and laying fibers into a web, and then subjecting the web to hydroentanglement or needling to form a network structure between the fibers, thereby forming a unitary fabric.
Nonwoven fabrics are often used in the manufacture of wet wipes, facial masks, medical dressings, and the like, and require good moisture absorption properties. At present, the non-woven fabric with better moisture absorption performance generally contains more components such as polyester fibers and the like, and the degradation performance of the non-woven fabric is poorer, so that the non-woven fabric has adverse effects on environmental protection.
Disclosure of Invention
In order to guarantee the hydroscopicity in the time, make the non-woven fabrics have better degradability, this application provides a high water absorption environmental protection non-woven fabrics.
The application provides a high environmental protection non-woven fabrics that absorbs water adopts following technical scheme:
the high-water-absorption environment-friendly non-woven fabric is obtained by carding fibers into a fiber web and then carrying out needling treatment, wherein the fiber web comprises chitosan fibers, plant-based fibers, viscose fibers and synthetic carbon fibers, the chitosan fibers account for 33-50% of the total mass of the fiber web, the viscose fibers account for 15-20% of the total mass of the fiber web, and the synthetic carbon fibers account for 20-25% of the mass of the fiber web.
In the technical scheme, a mixed system of chitosan fibers, plant-based fibers and carbon fibers is adopted, the three fibers have better degradation performance in nature, and the surface of the chitosan fibers has more polar groups, so that the chitosan fibers have a stronger interweaving and winding structure and better strength after being wound, and the polar groups can better adsorb moisture. The plant-based fiber contains more porous structures, has stronger adsorbability, better water absorption effect and stronger degradation performance under natural environment.
Generally in the non-woven fabrics surface fabric, need incorporate certain polypropylene fibre or polyester fiber, because polypropylene fibre and polyester fiber have better intensity, consequently make non-woven fabrics surface fabric have stronger tensile strength, but polyester fabric, polypropylene fibre surface fabric belongs to the non-degradable material, be not conform to the theory of environmental protection, in this application, select synthetic carbon fiber as the intensity basis, also there is better compliance when the carbon fiber has better intensity, under the prerequisite that forms better winding structure at chitosan fiber and sticky fiber, synthetic carbon fiber's addition is influencing little to whole degradation ability, can improve the intensity of non-woven fabrics simultaneously by a wide margin, make the whole mechanical properties of non-woven fabrics better. And the fiber types have better affinity to water and better water absorption performance.
Optionally, the plant-based fibers are a combination of bamboo charcoal fibers and rice husk carbon fibers, and the mass ratio of the bamboo charcoal fibers to the rice husk carbon fibers is (2-5) to 1.
In the technical scheme, the bamboo charcoal fiber and the rice husk carbon fiber are selected, so that the degradation effect is good, and meanwhile, the overall water absorption liquid of the non-woven fabric is good. In addition, the rice husk carbon fiber belongs to an environment-friendly material, the raw material source of the rice husk carbon fiber is useless rice husk, the rice husk carbon fiber has good degradation performance, and a certain amount of the rice husk carbon fiber is doped into the non-woven fabric, so that the rice husk carbon fiber not only has good properties in all aspects, but also meets the requirement of environmental protection.
Optionally, the viscose is a mixture of short viscose fibers and long viscose fibers, wherein the short viscose fibers are less than or equal to 30mm in length, the long viscose fibers are 75-85 mm in length, and the long viscose fibers are not less than 20% of the total mass of the viscose.
In the technical scheme, the combination of the short viscose fibers and the long viscose fibers is adopted, and the long viscose fibers can play a role in connecting each node in a system, so that the connection strength among all winding structures in the non-woven fabric is improved. Meanwhile, the long viscose fibers are longer, so that the long viscose fibers can be wound with a plurality of winding nodes in the needling process, and the strength of the non-woven fabric bag is improved.
Optionally, the fineness of the viscose staple fibers is 1.0-2.0D, and the fineness of the viscose long fibers is 3.0-5.0D.
The strength of the non-woven fabric can be further improved by adopting thicker viscose long fibers, so that the tear resistance of the non-woven fabric is greatly enhanced.
Optionally, the fineness of the bamboo charcoal fiber and the fineness of the rice husk carbon fiber are not higher than 1.2D.
Adopt thinner bamboo charcoal fiber and rice husk carbon fiber, can make the plant base fiber system softer on the one hand, the sense of touch is better, and the winding system can be comparatively inseparable simultaneously for the intensity of non-woven fabrics further improves.
Optionally, the lengths of the bamboo charcoal fiber and the rice hull carbon fiber are 45-50 mm.
The length setting of bamboo charcoal fiber and rice husk carbon fiber has certain influence to the inside structure of non-woven fabrics, can compromise creek performance and intensity.
Optionally, the synthetic carbon fiber is subjected to mixed acid activation treatment, and the mixed acid is a mixed system of sulfuric acid and nitric acid.
In the technical scheme, the synthetic carbon fibers are subjected to mixed acid treatment, so that more active groups and pore structures can be formed on the surfaces of the synthetic carbon fibers, on one hand, the strength and stability of the non-woven fabric can be improved by increasing the active groups, and meanwhile, the biocompatibility of the synthetic carbon fibers can also be improved, so that the non-woven fabric has better biodegradability.
Optionally, the mass ratio of the sulfuric acid to the nitric acid in the mixed acid is (5-10) to 1, the concentration of hydrogen ions in the mixed acid is 1-10M, and the treatment time of the synthetic carbon fiber in the mixed acid is 10-20 s.
In the technical scheme, the mixed acid in the concentration range has a good activation effect on the synthetic carbon fiber, the strength loss of the synthetic carbon fiber is small, and the mechanical strength, the degradation performance and the water absorption performance of the non-woven fabric can be considered.
Optionally, the fiber web further comprises polylactic acid fibers accounting for 3-5% of the total mass of the fiber web.
In the technical scheme, the polylactic acid fiber is added, so that the water absorption performance of the non-woven fabric is further improved, and meanwhile, the softness and the touch feeling are also obviously improved, and the user experience of the non-woven fabric is improved.
Optionally, the length of the polylactic acid fiber is 15-20 mm, and the fineness of the polylactic acid fiber is 0.6-1.1D.
By adopting the polylactic acid fiber with the specification, the non-woven fabric can have better water absorption and better comfort level.
In summary, the present application includes at least one of the following advantages:
1. in this application, through the combination of chitosan fiber, plant-based fiber, viscose fiber and synthetic carbon fiber, the non-woven fabrics that the preparation obtained has the effect of high water absorption, and intensity is better simultaneously, has better degradation performance in addition, can degrade fast, has better environmental protection performance.
2. In this application further sets up, bamboo charcoal fiber and rice husk carbon fiber's combination is chooseed for use to the plant base fibre, when according with the environmental protection theory, also helps improving the intensity and the water absorption capacity of non-woven fabrics.
3. In this application further sets up, through adding polylactic acid fibre, when improving the non-woven fabrics hydroscopicity, make the non-woven fabrics have better comfort level.
Detailed Description
The present application will be described in further detail with reference to examples.
In the present application, the various fibers were purchased from the sources shown in Table 1.
TABLE 1 table of sources of materials
In the present application, the following experiments were performed to verify the properties of the nonwoven fabric in each aspect.
Experiment 1, water absorption experiment: reference is made to GB/T21655.1 evaluation of quick moisture absorption drying of textiles part 1: 8.1 method in the unidirectional combination test method, 5cm is cut2And (4) measuring the water absorption rate of the non-woven fabric, and recording the time for which the sample is immersed in water so as to measure the water absorption efficiency of the non-woven fabric.
Experiment 2, tear strength experiment: the tear strength of the nonwoven fabric was measured with reference to GB T3917.1-2009, test standard for tear strength by impact pendulum method of textile fabric tear performance part 1.
Experiment 3, sample 10cm was cut2Referring to the method in GB/T19811-2005, the weight loss ratio of the nonwoven fabric in the composting experiment was determined after composting at 65 ℃ for 10 days and then continuously composting at 50 ℃ for the twelfth week.
In examples 1 to 7, a high water absorption environment-friendly nonwoven fabric is prepared by first picking, mixing and carding chitosan fibers, plant-based fibers, viscose fibers and synthetic carbon fibers into a fiber web according to the mixture ratio shown in table 2, and then processing the fiber web by needling to obtain the nonwoven fabric.
During the needling weaving process, the fiber web weighs 29g/m2The needle density is 6000 pieces/m, and the needling frequency is 900 needles/min.
In examples 1 to 7, the chitosan fiber, the bamboo charcoal fiber, the rice husk carbon fiber and the viscose fiber all had a fineness of 1.1D and a length of 25 to 30 mm. The synthetic carbon fiber has the fineness of 1.6D and the length range of 35-40 mm.
Table 2, tables of fiber combinations in examples 1 to 7 and comparative examples 1 to 5
The results of experiments 1 to 3 performed on the above examples and comparative examples are shown in Table 3.
TABLE 3 Water absorption and mechanical Properties of examples 1 to 7 and comparative examples 1 to 5
According to the experimental results, compared with the schemes in comparative examples 1-5, the non-woven fabric prepared by the preparation method disclosed by the application can take water absorption performance, strength and degradation performance into consideration. In comparative example 1, too much chitosan fiber was added, and although the chitosan fiber had better hydrophilicity, the pores forming a network structure in the system were smaller, and water molecules did not easily enter, so that the hydrophilicity was rather reduced, and the strength was also reduced. In comparative example 2, the amount of chitosan fiber used was small, the strength was still sufficient but the hydrophilicity was not satisfactory. In comparative example 3, the degradation ability was greatly reduced due to the absence of the plant-based fiber, and the applicant believes that the antibacterial effect of the chitosan fiber itself inhibits the degradation of the nonwoven fabric in the absence of the plant-based fiber. In comparative example 4, the amount of the viscose fiber used was too small, the adhesive property of the viscose fiber was lacked, and the overall strength was remarkably decreased. In comparative example 5, the amount of the synthetic carbon fiber is reduced, and the synthetic carbon fiber can play a role of increasing the overall lightness in the system, since in the system, although most components can be bonded together by means of mutual attraction of polar groups, or by means of weak hydrogen bonds, there is a lack of a component whose molecule itself has sufficient strength. The synthetic carbon fiber has better environmental protection performance, can be degraded to a certain degree, has better strength, can play a role in supporting and strengthening in a system, is not easy to break as the stress on a molecular chain is stronger, and is beneficial to improving the strength of the non-woven fabric.
In example 6 and example 7, additional rice husk carbon fiber is added, which is an environmentally friendly raw material, and because it has better connection performance and is softer, it can form a better winding structure, and because the rice husk carbon fiber contains a certain amount of organic matter during the manufacturing process, it is helpful to improve the degradation performance. Meanwhile, the rice husk carbon fiber can be provided with more polar groups, has strong water absorption and is also beneficial to improving the whole water absorption performance.
Further, the properties of the viscose fiber, and the properties of the bamboo charcoal fiber and the rice husk carbon fiber were adjusted to obtain the following examples.
Embodiments 8 to 21 all relate to a high water absorption environment-friendly non-woven fabric, and are different from embodiment 6 in that properties of bamboo charcoal fibers, rice husk carbon fibers and viscose fibers are adjusted, wherein the viscose fibers specifically include viscose long fibers and viscose short fibers, which are specifically shown in table 4.
TABLE 4 Properties of carbon fibers, viscose fibers and rice husk carbon fibers of examples 8 to 21
The results of experiments 1 to 3 conducted on examples 8 to 21 are shown in Table 5.
TABLE 5 Properties of examples 8 to 21
The above embodiment is based on embodiment 6, and further optimizes the viscose fiber. Compared with the embodiment 6, the viscose fibers uniformly adopt a mode of 1.1D and 25-30 mm short fibers, and the long fibers and the short fibers are matched, so that a plurality of winding nodes can be connected together through the long fibers, and the strength of the non-woven fabric is greatly improved. Meanwhile, as for the water absorption of the non-woven fabric, the applicant speculates that the long and short viscose fibers can form a more stable network structure, the cavity therein can accommodate more water molecules, and the fiber network structure is not easy to collapse due to the attraction of hydrogen bonds in the water molecules, so that the example 8 obtains better water absorption performance compared with the example 6.
Examples 9-16 have adjusted the ratio of the amounts of the two viscose fibers. Because of the higher price of the viscose long fibers, the smaller the usage amount of the viscose long fibers, the better. Experiments show that when the proportion of the long viscose fibers in the viscose fibers is not less than 20%, the overall strength is good, the water absorption is good, and when the using amount of the long viscose fibers is less than 20% of the total amount of the viscose fibers, the overall strength tends to be weakened. In addition, the titer of the long viscose fiber is larger, the titer of the short viscose fiber is smaller, the formed network structure is more stable and uniform, and the water absorption performance and the strength are better. In addition, the long viscose fibers, when too long, may reduce the strength of the nonwoven fabric, and the applicant speculates that the long viscose fibers, when too long, may have a large internal stress and may be easily broken in the system, thereby reducing the strength of the nonwoven fabric.
In examples 17 to 21, the characteristics of the bamboo charcoal fiber and the rice husk carbon fiber were adjusted, the lengths of the bamboo charcoal fiber and the rice husk carbon fiber were preferably 45 to 50mm, and the formed fiber web had a better network structure after the needle punching treatment, and the water absorption performance was significantly enhanced, but the influence on the strength was small and only a small amount of improvement was observed.
Further, in addition to example 20, the following examples were provided in which synthetic carbon fibers were adjusted and modified.
Examples 22 to 33 are different from example 20 in that the synthetic carbon fibers are activated as follows:
and soaking the synthetic carbon fiber in mixed acid, wherein the molar concentration of different acids in the mixed acid and the soaking time are specifically shown as a standard 6.
TABLE 6 modified arrangement of synthetic carbon fibers
The results of experiments 1 to 3 conducted on examples 22 to 33 are shown in Table 7.
TABLE 7 Properties of examples 22 to 33
| Numbering | Water absorption (%) | Sinking time(s) | Tearing strength (N) | Loss ratio (%) |
| Example 22 | 1268 | 52 | 475.2 | 73.6 |
| Example 23 | 1265 | 53 | 471.9 | 74.3 |
| Example 24 | 1264 | 52 | 450.9 | 73.5 |
| Example 25 | 1289 | 56 | 474.9 | 70.7 |
| Example 26 | 1309 | 60 | 476.4 | 74.2 |
| Example 27 | 1242 | 57 | 468.5 | 69.4 |
| Example 28 | 1374 | 55 | 461.8 | 75.9 |
| Example 29 | 1343 | 53 | 419.0 | 77.0 |
| Example 30 | 1329 | 53 | 474.5 | 74.6 |
| Example 31 | 1151 | 59 | 481.3 | 69.4 |
| Example 32 | 1381 | 53 | 470.2 | 74.0 |
| Example 33 | 1362 | 56 | 421.0 | 77.3 |
In the above examples, the synthetic carbon fibers were treated to significantly enhance the water absorption and degradation properties, and the strength of the synthetic carbon fibers was slightly reduced due to the presence of the mixed acid, compared to example 20 using untreated synthetic carbon fibers, and the degree of reduction was not significant when the hydrogen ion concentration in the mixed acid was in the range of 1 to 10M, but the water absorption and degradation efficiency were significantly improved. The principle of the method is that after mixed acid catalysis, the surface of the synthetic carbon fiber has a partial porous structure and a partial polar group structure, so that the synthetic carbon fiber has better biocompatibility and is beneficial to the growth and the retention of microorganisms in the synthetic carbon fiber. Generally, in a normal environment, microorganisms are few, and when the activated synthetic carbon fiber is used as a wet tissue and the like, the chitosan fiber has strong antibacterial performance, so that the non-woven fabric is not easy to generate a microorganism breeding phenomenon, and under a degradation condition, the microorganism density is high, so that the biodegradation performance of the activated synthetic carbon fiber is obviously improved. In example 24, the nitric acid content was low, resulting in poor oxidizing ability of the mixed acid and less influence on the nonwoven fabric performance after the mixed acid treatment.
Further, in each of the setting examples 34 to 41, a high water-absorbent environment-friendly nonwoven fabric was used, and specifically, polylactic acid fibers were added to the fiber web in addition to example 26, wherein the fineness and the length of the polylactic acid fibers and the amount of each fiber are shown in table 8.
Table 8, in examples 34 to 41, the specific gravity of polylactic acid fibers and the Properties of polylactic acid fibers
The results of experiments 1 to 3 conducted on examples 34 to 41 are shown in Table 9.
TABLE 9 Properties of examples 34 to 41
| Numbering | Water absorption (%) | Sinking time(s) | Tearing strength (N) | Loss ratio (%) |
| Example 34 | 1482 | 57 | 478.0 | 75.1 |
| Example 35 | 1441 | 56 | 473.2 | 74.9 |
| Example 36 | 1390 | 56 | 481.9 | 76.0 |
| Example 37 | 1495 | 57 | 441.8 | 75.5 |
| Example 38 | 1474 | 54 | 476.5 | 74.2 |
| Example 39 | 1404 | 53 | 473.9 | 71.4 |
| Example 40 | 1375 | 57 | 480.1 | 70.5 |
| EXAMPLE 41 | 1431 | 55 | 454.3 | 76.5 |
In the above embodiment, the polylactic acid fiber is further added, and the polylactic acid fiber has a certain effect of improving the water absorption rate and promoting the degradation efficiency, but has a small effect on the strength of the nonwoven fabric. Meanwhile, the fineness of the polylactic acid fiber is preferably in the range of 0.2 to 1.1D. The excessively fine polylactic acid fibers have a significant adverse effect on the strength of the nonwoven fabric.
Another main purpose of adding the polylactic acid fiber is to improve the softness and hand feeling of the nonwoven fabric, so experiment 4 was set up to verify the above effects.
Experiment 4, 50 volunteers were selected, felt the tactile sensation of some examples in this application by touching with hands, scored for both softness and suppleness of the surface, optimally 10 points, and then averaged as shown in table 10.
The evaluation indexes of the softness are whether the non-woven fabric is easy to fold and knead and whether the fold is obvious after being folded. The evaluation index of the softness is whether the surface of the non-woven fabric is soft and comfortable and has no burr feeling.
Table 10 softness and softness scores of some examples
According to the experimental data, the addition of the polylactic acid fibers can improve the softness and softness of the non-woven fabric, and the improvement of user experience is facilitated. Wherein, the softness and the softness are influenced by the properties of the polylactic acid fiber.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The high-water-absorption environment-friendly non-woven fabric is characterized by being obtained by carding fibers into a fiber web and then carrying out needling treatment, wherein the fiber web comprises chitosan fibers, plant-based fibers, viscose fibers and synthetic carbon fibers, the chitosan fibers account for 33-50% of the total mass of the fiber web, the viscose fibers account for 15-20% of the total mass of the fiber web, and the synthetic carbon fibers account for 20-25% of the mass of the fiber web.
2. The high-water-absorption environment-friendly non-woven fabric as claimed in claim 1, wherein the plant-based fibers are a combination of bamboo charcoal fibers and rice husk carbon fibers, and the mass ratio of the bamboo charcoal fibers to the rice husk carbon fibers is (2-5) to 1.
3. The high-water-absorption environment-friendly non-woven fabric according to claim 2, wherein the viscose fibers are a mixture of short viscose fibers and long viscose fibers, the length of the short viscose fibers is less than or equal to 30mm, the length of the long viscose fibers is 75-85 mm, and the mass of the long viscose fibers is not less than 20% of the total mass of the viscose fibers.
4. The high-water-absorption environment-friendly non-woven fabric as claimed in claim 3, wherein the fineness of the viscose staple fibers is 1.0-2.0D, and the fineness of the viscose long fibers is 3.0-5.0D.
5. The high-water-absorption environment-friendly non-woven fabric according to claim 2, wherein the fineness of the bamboo charcoal fiber and the fineness of the rice husk carbon fiber are not higher than 1.2D.
6. The high-water-absorption environment-friendly non-woven fabric according to claim 5, wherein the bamboo charcoal fiber and the rice hull carbon fiber are 45-50 mm in length.
7. The high-water-absorption environment-friendly non-woven fabric according to claim 2, wherein the synthetic carbon fiber is activated by mixed acid, and the mixed acid is a mixed system of sulfuric acid and nitric acid.
8. The environment-friendly non-woven fabric with high water absorption according to claim 7, wherein the mass ratio of sulfuric acid to nitric acid in the mixed acid is (5-10) to 1, the hydrogen ion concentration in the mixed acid is 1-10M, and the treatment time of the synthetic carbon fiber in the mixed acid is 10-20 s.
9. The high-water-absorption environment-friendly non-woven fabric according to claim 2, wherein the fiber web further comprises polylactic acid fibers accounting for 3-5% of the total mass of the fiber web.
10. The high-water-absorption environment-friendly non-woven fabric according to claim 9, wherein the polylactic acid fiber has a length of 15-20 mm and a fineness of 0.6-1.1D.
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Application publication date: 20211207 |