CN114075792A - Halogen-free or low-halogen polyamide coated fabric and preparation method thereof - Google Patents
Halogen-free or low-halogen polyamide coated fabric and preparation method thereof Download PDFInfo
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- CN114075792A CN114075792A CN202010842200.7A CN202010842200A CN114075792A CN 114075792 A CN114075792 A CN 114075792A CN 202010842200 A CN202010842200 A CN 202010842200A CN 114075792 A CN114075792 A CN 114075792A
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- 239000004952 Polyamide Substances 0.000 title claims abstract description 67
- 229920002647 polyamide Polymers 0.000 title claims abstract description 67
- 239000004744 fabric Substances 0.000 title claims abstract description 51
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 48
- 150000002367 halogens Chemical class 0.000 claims abstract description 22
- 229920001778 nylon Polymers 0.000 claims abstract description 9
- 239000004677 Nylon Substances 0.000 claims abstract description 8
- 230000001413 cellular effect Effects 0.000 claims abstract description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 229920004933 Terylene® Polymers 0.000 claims description 8
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 4
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 4
- 150000001768 cations Chemical class 0.000 claims description 4
- 229910001416 lithium ion Inorganic materials 0.000 claims description 4
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 229910001415 sodium ion Inorganic materials 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 2
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims description 2
- 229910001424 calcium ion Inorganic materials 0.000 claims description 2
- 239000006255 coating slurry Substances 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910001414 potassium ion Inorganic materials 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- -1 halogen ions Chemical class 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229920002292 Nylon 6 Polymers 0.000 description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 6
- 239000001110 calcium chloride Substances 0.000 description 6
- 229910001628 calcium chloride Inorganic materials 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940037179 potassium ion Drugs 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/125—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyamides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2203/00—Macromolecular materials of the coating layers
- D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06N2203/065—Polyamides
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention provides a halogen-free or low-halogen polyamide coated fabric and a preparation method thereof, wherein the surface of the coated fabric is covered with a polyamide coating film with a porous structure on the surface and a cellular fluffy structure inside, and the halogen content in the polyamide coating film is less than 200 ppm. The preparation process of the halogen-free polyamide coated fabric can avoid generating a large amount of halogen ions, can improve the dissolving capacity of polyamide so as to obtain a better polyamide coating effect, and improves whiteness, rubbing fastness and washing fastness, so that the requirement of actually producing and processing the nylon label tape is met.
Description
Technical Field
The invention relates to a polyamide coated fabric in a textile functional fabric and preparation thereof, in particular to a novel polyamide coated fabric with no halogen/low halogen content residue and a preparation method thereof.
Background
Nylon 6(PA6), a very important chemical product in modern industrial production and daily life, has wide application in many fields such as clothing, packaging, automobiles, etc. However, PA6 is mainly derived from petroleum, belongs to a non-renewable substance, cannot be degraded in the natural environment, and seriously pollutes the environment. Therefore, the recycling of PA6 is a very important proposition in sustainable economy.
Since the 20 th century and the 80 th year, the polyamide wet coating technology is gradually applied to trademark coated fabrics, and products obtained by the technology have the characteristics of low cost, comfortable hand feeling and the like. At present, polyamide slurry commonly used is formed by using methanol as a solvent and calcium chloride as a dissolving aid to dissolve PA6, and adding functional substances such as a proper whitening agent, a flame retardant and the like on the basis of the PA 6.
However, in actual industrial production, during the wet coating water bath exchange process of the traditional calcium chloride/methanol system slurry, a large amount of chloride ions enter the water bath, and finally enter the environment through waste water discharge. High concentrations of chloride ions can increase the osmotic pressure of the aqueous environment, thereby killing microorganisms. Studies have shown that when the chloride ion concentration in wastewater is greater than 8000mg/L, a significant number of microorganisms begin to deactivate and the microbial community in the water area largely disappears. The death of the microbial community can cause the volume of the sludge to expand, a large amount of foam is generated on the water surface, and the degradation capability of the ecological system is reduced until the system loses the treatment capability. The biological oxygen demand and chemical oxygen demand (COD, BOD) and the absorbable halide (AOX) indexes are large and do not meet the industrial wastewater discharge standard on the detection data of the wastewater.
In addition, if excessive chloride ions remain in the polyamide coating, adverse reactions may occur to the human skin. Therefore, the chloride ion content of the polyamide coated product must be strictly controlled for certain products with higher standard quality requirements. At present, the method for reducing the residual chloride ions widely adopted in the market is to reduce the residual chloride ions in the polyamide coating to about 400ppm by washing a large amount of coating products repeatedly, but the high-cost and high-energy-consumption mode is not suitable for the requirement of modern green manufacturing production, and meanwhile, the method cannot reach the very high residual chloride ion standard and is difficult to achieve below 200 ppm.
In conclusion, if halogen-containing raw materials can be reduced or not used in the slurry preparation stage, the damage of industrial discharged wastewater to an ecosystem can be reduced, and meanwhile, the halogen ion residue in a polyamide coating product can be reduced, and the product quality can be improved.
Disclosure of Invention
The halogen residue in the polyamide coating product in the current industry is more than 1000-2000ppm, and the residual value can be reduced to about 400ppm after a large amount of water washing process operation. The invention aims to provide a halogen-free or low-halogen polyamide coated fabric and a preparation method thereof, wherein the halogen-free residue or halogen residue detection value in the coating is less than 10ppm, the low-halogen residue or halogen residue detection value is less than 200ppm and more than 10ppm, and the halogen is chlorine.
The invention provides a technical solution for solving the problem of overhigh halogen residue in the production of the existing polyamide coating, which comprises the following steps:
a halogen-free or low-halogen polyamide coated fabric, characterized in that: the surface of the coated fabric is covered with a polyamide coating film with a porous structure on the surface and a cellular fluffy structure inside, and the halogen residue detection value in the polyamide coating film is less than 200 ppm.
Preferably, the halogen residue detection value of the low-halogen polyamide coating film is 10-150 ppm, and the halogen residue detection value of the halogen-free polyamide coating film is less than 10 ppm.
The pore diameter of the surface porous structure of the polyamide coating film is less than or equal to 1500nm, and the average pore diameter range of the pores of the internal honeycomb fluffy structure is 2-20 mu m. The aperture is the distance between the two points of the orifice of the hole that are furthest apart. The aperture statistics can be judged by adopting scanning electron microscope SEM photos, and the specific method comprises the steps of taking 10-15 scanning electron microscope photos with the magnification of 10000 times, measuring and counting the apertures of 500 holes and calculating the number average value.
The number of pores on the surface of the polyamide coating is 1-10 per square micron. The statistics of the number of holes can be determined by scanning electron microscope SEM pictures. The specific method comprises the steps of taking 10-15 scanning electron micrographs with the magnification of 10000 times, selecting 10 units of square micron areas for hole number statistics, and then calculating the number average value.
The cellular fluffy structure is characterized in that holes are filled below the surface of the coating, internal partial holes are communicated with each other, at least partial internal communicated holes are also communicated with surface holes, and at least partial surface holes are also communicated with the internal communicated holes and further communicated with the surface of the fabric. The coating can obtain higher strength and better flexibility by the structure.
The polyamide coating film is preferably formed in situ on the fabric surface by water exchange phase transformation of a polyamide coating slurry. The polyamide coating may cover only the upper or lower surface of the fabric, or both.
The raw material fiber adopted by the fabric is not particularly limited, and different fibers and different yarns can be selected for weave according to different use environments. Wherein the preferable textile is a woven fabric at least containing one or more of terylene, sulfonic modified terylene and nylon.
A preparation method of a halogen-free or low-halogen polyamide coating fabric is characterized by comprising the following steps: blending size according to the following formula, then putting the grey cloth into the size for coating, exchanging water for 1-5 minutes under the water bath condition of the temperature of 30-35 ℃, and then drying at the temperature of 80-150 ℃ to obtain a coated fabric;
wherein the slurry adopts methanol as a solvent and comprises the following components:
the mass fraction of the dissolving assistant is 20-30%;
the mass fraction of the polyamide fiber is 10-15%;
the dissolution auxiliary agent is: a mixed salt consisting of several halogen-free metal salts, soluble in methanol to form a solution, wherein the metal cation content is 0.1-0.3 mol/kg, and the metal cation is Ca ion2+Mainly contains sodium ions Na+Magnesium ion Mg2+Zinc ion Zn2+Potassium, potassiumIon K+.Lithium ion Li+One or more of them.
The grey cloth can be made of nylon or terylene; or blended grey cloth with more than 30 percent of nylon or terylene content.
The polyamide fibers are preferably polyamide 6 fibers.
The polyamide slurry is coated on nylon fabric or blended fabric containing nylon fibers or terylene or blended fabric containing terylene fibers, and after phase inversion is completed through a water coagulation bath, a polyamide film with a compact small surface layer and a unique honeycomb structure inside and with the structure described above can be finally formed on the surface of the coated fabric. The film coating has extremely slight halogen residue or halogen residue detection value, the polyamide coating film has the halogen residue detection value of less than 200ppm, and the waste water produced by processing the polyamide coating film also meets the requirement of actually discharging the waste water. Compared with the traditional polyamide coated fabric produced by a calcium chloride/methanol system, the halogen-free or low-halogen polyamide coated fabric prepared by the invention has better hand feeling, rubbing color fastness and whiteness.
On the basis of the components, the sizing agent can be used for preparing a polyamide coating product with a flame retardant function by adding a flame retardant, adding fillers with different colors to obtain polyamide coating products with different colors, and also can be used for producing a low-strength polyamide coating product with low tearing performance by adopting low-strength nylon or polyester yarns, wherein the tearing strength of the product is less than or equal to 1.6N and the like.
According to GB/T3920-. According to GBT 17644-.
In summary, compared with the prior art, the invention has the following beneficial effects:
1) the novel halogen-free dissolving auxiliary agent is innovatively adopted to dissolve the polyamide fiber, so that the dissolving efficiency and the dissolving capacity are greatly improved, stable and uniform polyamide fiber slurry is obtained, and the industrial processing system which is mainly methanol/calcium chloride and is widely applied at present is changed. The novel halogen-free dissolving system has the time for dissolving the polyamide fiber of 1.5 to 2 hours, which is shortened by 1.5 to 2 hours compared with the dissolving time of a methanol/calcium chloride system.
2) Based on a novel halogen-free dissolving system, the polyamide coating with compact pores on the surface and a unique honeycomb structure inside can be obtained through a wet coating.
3) The halogen-free polyamide slurry obtained by the invention has high stability, can be directly applied to wet coating of fabrics, can obtain better hand feeling, elasticity and other excellent performances than the existing methanol/calcium chloride dissolving system, and obviously improves the dry and wet rubbing fastness and the washing fastness to be more than grade 4.
Drawings
FIG. 1 SEM photograph of the surface coating morphology of the coated fabric prepared in example 8.
FIG. 2 SEM photograph of the morphology of the honeycomb coating inside the coated fabric made in example 8.
FIG. 3 is an SEM image of the overall cross-sectional profile of the coated fabric prepared in example 8.
Detailed Description
The present invention will be further described with reference to specific examples, but the scope of the present invention is not limited thereto, and all equivalent changes or modifications made in accordance with the spirit of the present invention should be covered thereby.
Examples 1 to 10:
step 1: according to the proportion shown in Table 1, in examples 1-10, after a halogen-free dissolution assistant is mixed with a certain amount of polyamide fiber, a solvent methanol is added, the temperature is raised and stirring is started, the stirring speed is 3000-3200 rpm, wherein the dissolution time of examples 1-10 is 1.5-2 hours, the dissolution time of a comparative example is 3-4 hours, and the system temperature is reduced to 40 ℃ to obtain polyamide slurry.
Step 2: and (3) coating the grey cloth in the sizing agent, exchanging water for 1-5 minutes under the water bath condition of the temperature of 30-35 ℃, and then drying at the temperature of 80-150 ℃ to obtain the textile.
TABLE 1 compounding ratio of dissolving aid and amount of polyamide fiber
In order to better embody the benefits of the present invention, the following performance tests were performed on the halogen-free polyamide coated fabrics obtained in examples 1 to 10 of the present invention and the halogen-containing polyamide coated fabric obtained in comparative example (halogen-containing calcium), after being subjected to black ink jet printing, and the test results are shown in table 2:
TABLE 2 results of the Performance test of examples 1-10 and comparative examples
| Examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Comparative example |
| Whiteness degree | 93.4 | 94.5 | 94.5 | 94.4 | 94.7 | 95.1 | 95.2 | 95.9 | 93.9 | 93.3 | 92.3 |
| Fastness to dry rubbing/grade | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4-5 | 4 | 4 | 3-4 |
| Wet rub fastness/grade | 4 | 4 | 4 | 4 | 4 | 4 | 4-5 | 4-5 | 4-5 | 4 | 3-4 |
| Fastness to washing/grade | 4 | 4 | 4 | 4 | 4 | 4 | 4-5 | 4-5 | 4-5 | 4 | 3-4 |
Note: the whiteness is determined by GBT 17644-; the rubbing fastness test refers to GB/T3920-; the color fastness to washing is tested by referring to GB/T3920-2008 'color fastness to washing of textile color test soaping color fastness' on the ink printing trademark coating fabric, and the examples and the comparative examples are subjected to black ink jet printing.
In order to better embody the benefits of the present invention, the structures and the residual halogen detection structures of the halogen-free polyamide coated fabrics obtained in examples 1 to 10 of the present invention and the halogen-containing polyamide coated fabric obtained in the comparative example are compared, and the comparison results of the examples and the comparative example are shown in table 3.
Table 3: comparison of examples 1-10 with the coating Structure of the comparative example
The coating thickness was measured by a thickness meter (Shanghai Shishun industries Co., Ltd., Elcometer 456 coating thickness meter).
The statistics of the average particle size of the surface and internal pores can be determined by scanning electron microscope SEM photographs. The specific method comprises the steps of taking 10-15 scanning electron micrographs with the magnification of 10000 times, measuring and counting the particle sizes of 500 holes and solving the number average value.
The statistics of the number of holes can be determined by scanning electron microscope SEM pictures. The specific method comprises the steps of taking 10-15 scanning electron micrographs with the magnification of 10000 times, selecting 10 units of square micron areas for hole number statistics, and then calculating the number average value.
Wherein, fig. 1, 2 and 3 respectively show the surface layer hole structure, the internal honeycomb fluffy structure and the whole cross-section structure of the coating fabric in the embodiment 8.
Residual halogen content determination standard: BS EN 14582:2007 halogen detection method.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (7)
1. A halogen-free or low-halogen polyamide coated fabric, characterized in that: the surface of the coated fabric is covered with a polyamide coating film with a porous structure on the surface and a cellular fluffy structure inside, and the halogen residue detection value in the polyamide coating film is less than 200 ppm.
2. A halogen-free or low-halogen polyamide coated fabric as claimed in claim 1, wherein: the pore diameter of the porous structure on the surface of the polyamide coating film is less than or equal to 1500 nm; the average pore diameter range of the pores of the internal honeycomb fluffy structure is 2-20 mu m.
3. A halogen-free or low-halogen polyamide coated fabric as claimed in claim 1, wherein: the number of pores on the surface of the polyamide coating is 1-10 per square micron.
4. A halogen-free or low-halogen polyamide coated fabric as claimed in claim 1, wherein: the polyamide coating covers the upper surface and/or the lower surface of the fabric and has a thickness of 0.05-1.0 mm.
5. A halogen-free or low-halogen polyamide coated fabric as claimed in claim 1, wherein: the polyamide coating film is formed in situ on the surface of the fabric by water exchange phase transformation of polyamide coating slurry.
6. A preparation method of a halogen-free or low-halogen polyamide coating fabric is characterized by comprising the following steps: blending size according to the following formula, then putting the grey cloth into the size for coating, exchanging water for 1-5 minutes under the water bath condition of the temperature of 30-35 ℃, and then drying at the temperature of 80-150 ℃ to obtain a coated fabric;
wherein the slurry adopts methanol as a solvent and comprises the following components:
the mass fraction of the dissolving assistant is 20-30%;
the mass fraction of the polyamide fiber is 10-15%;
the dissolution auxiliary agent is: a mixed salt consisting of several halogen-free metal salts, soluble in methanol to form a solution, wherein the metal cation content is 0.1-0.3 mol/kg, and the metal cation is Ca ion2+Mainly contains sodium ions Na+Magnesium ion Mg2+Zinc ion Zn2+Potassium ion K+.Lithium ion Li+One or more of。
7. The method of claim 6, wherein the method comprises the steps of: the grey cloth is woven by nylon or terylene; or blended grey cloth with more than 30 percent of nylon or terylene content.
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| CN202010842200.7A CN114075792B (en) | 2020-08-20 | 2020-08-20 | Halogen-free or low-halogen polyamide coated fabric and preparation method thereof |
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| CN202010842200.7A CN114075792B (en) | 2020-08-20 | 2020-08-20 | Halogen-free or low-halogen polyamide coated fabric and preparation method thereof |
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| CN114075792B CN114075792B (en) | 2023-12-22 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4770777A (en) * | 1987-01-29 | 1988-09-13 | Parker Hannifin Corporation | Microporous asymmetric polyamide membranes |
| US5215662A (en) * | 1988-12-16 | 1993-06-01 | Micron Separations Inc. | Heat resistant microporous material production and products |
| JP2001058330A (en) * | 1999-08-23 | 2001-03-06 | Ube Ind Ltd | Porous film and manufacture thereof |
| CN1887365A (en) * | 2006-08-01 | 2007-01-03 | 四川大学 | Biological material film with porous structure and its prepn |
| US20100310853A1 (en) * | 2008-02-11 | 2010-12-09 | Stefan Schwiegk | Method for producing porous structures from synthetic polymers |
| CN103590251A (en) * | 2013-11-13 | 2014-02-19 | 湖州新利商标制带有限公司 | Flame-retardant nylon label cloth with wet-process glued layers and manufacturing method thereof |
| CN109554934A (en) * | 2018-12-06 | 2019-04-02 | 湖州新利商标制带有限公司 | Anti- preparation method, coating process and trademark belt for cutting trademark belt coating sizing material |
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2020
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| CN1887365A (en) * | 2006-08-01 | 2007-01-03 | 四川大学 | Biological material film with porous structure and its prepn |
| US20100310853A1 (en) * | 2008-02-11 | 2010-12-09 | Stefan Schwiegk | Method for producing porous structures from synthetic polymers |
| CN103590251A (en) * | 2013-11-13 | 2014-02-19 | 湖州新利商标制带有限公司 | Flame-retardant nylon label cloth with wet-process glued layers and manufacturing method thereof |
| CN109554934A (en) * | 2018-12-06 | 2019-04-02 | 湖州新利商标制带有限公司 | Anti- preparation method, coating process and trademark belt for cutting trademark belt coating sizing material |
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