CN112776459A - Preparation process and equipment of carbon-sandwiched cloth with nano silver moxa carbon - Google Patents
Preparation process and equipment of carbon-sandwiched cloth with nano silver moxa carbon Download PDFInfo
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- CN112776459A CN112776459A CN202110043981.8A CN202110043981A CN112776459A CN 112776459 A CN112776459 A CN 112776459A CN 202110043981 A CN202110043981 A CN 202110043981A CN 112776459 A CN112776459 A CN 112776459A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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Abstract
The invention discloses a preparation process and equipment of carbon-sandwiched cloth with nano silver moxa carbon, wherein the process comprises the following steps: sequentially placing the lower backing cloth along the output direction of the production line; sequentially carrying out primary glue spraying, primary carbon material spraying, secondary glue spraying and secondary carbon material spraying on the lower-layer back lining cloth on the production line; spraying glue for the third time after secondary carbon scattering, and then winding the upper-layer base fabric along the output direction of the production line; pressing the upper-layer base cloth, the lower-layer back lining cloth and the activated carbon layer formed between the upper-layer base cloth and the lower-layer back lining cloth to bond and fix the upper-layer base cloth and the lower-layer back lining cloth into a whole to form carbon-sandwiched cloth with nano-silver moxa carbon; wherein, the glue spraying adopts fan-shaped linear spraying, and the output speed of the production line is 5-15 m/min. The invention adoptsThe total carbon amount is 100-500 g/m2The charcoal material is broken active carbon, and adopts the fan-shaped straight line to spray the viscose mode and the charcoal cloth of pressing down the charcoal mode obtained twice, has not only greatly reduced the air resistance who presss from both sides the charcoal cloth, has still improved its filtration bactericidal effect.
Description
Technical Field
The invention relates to the technical field of cloth processing production and air purification, in particular to a process and equipment for preparing carbon-sandwiched cloth with nano silver moxa carbon.
Background
The active carbon is a carbon material which is prepared by carbonizing and activating carbon-containing substances such as plants or coal and the like, has rich pore structure, huge specific surface area, excellent adsorption characteristics (both physical and chemical adsorption characteristics), no toxicity, no smell and stable chemical propertiesAnd (5) feeding. Because it can effectively remove benzene, nitrogen, formaldehyde, odor, peculiar smell and other harmful substances in the air and has effective antibacterial effect, it is widely used in the fields of air purification and the like. The product can be used for air purification, such as activated carbon fiber, activated carbon non-woven fabric, activated carbon foam, activated carbon paper, activated carbon cloth, etc. The activated carbon fiber is high in price and difficult to popularize, and the performance of the activated carbon is reduced by adopting a large amount of adhesive for other activated carbon composite air filtering products. At present, activated carbon powder is adhered to foam and paper materials by adhesives in activated carbon foam and activated carbon paper, and activated carbon non-woven fabrics and activated carbon fabrics are laminated, but a method of directly adhering the adhesives to the activated carbon is adopted. As in the Chinese patent: 03229258.9 coating adhesive on the upper and lower layers of cloth, dispersing bamboo charcoal powder, compounding the two layers of cloth, and adhering bamboo charcoal in the middle to obtain bamboo charcoal cloth; such activated carbon non-woven fabric or activated carbon woven fabric has an advantage in that carbon can be prevented from falling off, but the loss of the performance of activated carbon is still significant. Chinese patent: 200510049884.0 activated carbon non-woven fabric and its manufacturing process, the disclosed activated carbon non-woven fabric comprises a non-woven fabric layer, the concrete technical measures also include: the non-woven fabric layer is also uniformly adsorbed and fused with an activated carbon layer consisting of powdery structure particles from the layer to the layer surface, and the part of the activated carbon layer penetrating into the non-woven fabric layer matrix forms an activated carbon fusion knot. "such nonwoven fabric inevitably loses the performance of the activated carbon because the activated carbon is fused to the nonwoven fabric substrate, thereby reducing the purification effect of the material. Chinese patent: 200610053595.2A carbon-sandwiched non-woven fabric filter material comprises an upper layer, a middle layer and a lower layer of non-woven fabrics and active carbon arranged between the non-woven fabric networks of the middle layer, and the manufacturing process flow is as follows: (1) unwinding a lower-layer non-woven fabric, unwinding a first-layer hot-melt adhesive film/hot-melt adhesive net/or low-melting-point non-woven fabric, unwinding a middle-layer mesh non-woven fabric, or unwinding a composite non-woven fabric (mesh non-woven fabric face up), (2) spreading activated carbon particles, (3) unwinding a second-layer hot-melt adhesive film/hot-melt adhesive net/low-melting-point non-woven fabric, unwinding an upper-layer non-woven fabric, (4) ultrasonically compounding and/or hot-pressing compounding, and (5) winding a finished product. ExistingIn the technology for manufacturing the carbon-sandwiched cloth, the purification performance of the activated carbon in the carbon-sandwiched cloth is improved, but the air resistance of the carbon-sandwiched cloth is not considered, and the air resistance of the carbon-sandwiched cloth is too large (generally, the air volume is 300 m)3At/h, the air resistance is more than 30 Pa), which has great disadvantages in the application of the air purification field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a process and equipment for preparing carbon-sandwiched cloth with nano silver moxa carbon, so as to solve the problems in the technical background.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a preparation process of carbon-sandwiched cloth with nano silver moxa carbon comprises the following steps:
sequentially winding a lower backing fabric along the output direction of a production line;
step two, sequentially carrying out primary glue spraying, primary carbon material spraying, secondary glue spraying and secondary carbon material spraying on the lower-layer back lining cloth on the assembly line; the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 100-500 g/m2The proportion of the primary carbon scattering material to the secondary carbon discharging material is 1: 0.6 to 1.5;
thirdly, spraying glue for the third time after secondary carbon scattering, and then winding the upper-layer base fabric along the output direction of the production line; wherein the upper base fabric comprises melt-blown fabric;
step four, carrying out hot-pressing compounding on the upper-layer base cloth, the lower-layer back lining cloth and the activated carbon layer formed between the upper-layer base cloth and the lower-layer back lining cloth, so that the upper-layer base cloth and the lower-layer back lining cloth are bonded and fixed into a whole to form carbon-sandwiched cloth with nano silver moxa carbon;
step five, cooling, slitting and winding the charcoal-sandwiched cloth obtained in the step four to obtain a finished product;
wherein, the glue spraying adopts fan-shaped linear spraying, and the output speed of the production line is 5-15 m/min.
In the technical scheme, the upper-layer base cloth is sequentially provided with the non-woven fabric, the melt-blown cloth and the hot air cotton from top to bottom, and the lower-layer back lining cloth is sequentially provided with the hot air cotton and the non-woven fabric from top to bottom.
In the technical scheme, in the second step, the carbon material comprises nano-silver moxa carbon and activated carbon, wherein the nano-silver moxa carbon accounts for 1.2-1.5% of the total amount of the carbon material; the nano silver moxa carbon is nanometer silver loaded moxa activated carbon, and the activated carbon comprises any one of bamboo activated carbon, coconut shell activated carbon or walnut shell activated carbon.
In the technical scheme, the nano silver moxa carbon and the activated carbon in the carbon material are broken activated carbon, and the particle size of the broken activated carbon is 30-60 meshes.
In the technical scheme, the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 200-400 g/m2(ii) a More preferably, 300 to 360g/m25g of nano silver moxa carbon/360 g of activated carbon.
In the technical scheme, in the fourth step, the surface temperature of the hot pressing roller is 120-250 ℃ during hot pressing and compounding; the melting points of the upper layer of base cloth and the lower layer of back lining cloth are not lower than 200 ℃.
In the technical scheme, the glue spraying in the second step and the third step is carried out by adopting a low-pressure atomization spray gun.
On the basis, the equipment for preparing the carbon-sandwiched cloth with the nano-silver moxa carbon comprises: the lower-layer backing cloth conveying roller set, the upper-layer base cloth conveying roller set, the first glue spray gun, the first activated carbon sprinkling device, the second glue spray gun, the second activated carbon sprinkling device, the third glue spray gun and a hot pressing roller of the compound machine;
the lower-layer back lining cloth conveying roller set is used for conveying the lower-layer back lining cloth to the hot press roller in a rolling manner, and the upper-layer base cloth conveying roller set is used for conveying the upper-layer base cloth to the hot press roller in a rolling manner; the first glue spray gun, the first activated carbon sprinkling device, the second glue spray gun, the second activated carbon sprinkling device and the third glue spray gun are sequentially arranged between the lower-layer backing cloth conveying roller set and the upper-layer base cloth conveying roller set along the output direction of the production line;
the first glue spray gun, the second glue spray gun and the third glue spray gun are all arranged above the lower-layer back lining cloth (100) and are used for spraying glue on the upper surface of the lower-layer back lining cloth conveyed to the hot pressing roller by the lower-layer back lining cloth conveying roller group; the first activated carbon sprinkling device and the second activated carbon sprinkling device are arranged above the lower-layer back lining cloth and are used for sprinkling carbon materials towards the upper surface of the lower-layer back lining cloth which is conveyed to the hot pressing roller by the lower-layer back lining cloth conveying roller set and is sprayed with glue;
the hot-pressing roller is used for hot-pressing and compounding the surface of the lower-layer backing cloth sprayed with the carbon material and the upper-layer base cloth, so that the upper-layer base cloth and the lower-layer backing cloth are bonded and fixed into a whole to form carbon-sandwiched cloth with nano silver moxa carbon;
in the technical scheme, the lower backing cloth conveying roller group comprises a first non-woven cloth conveying roller and a first hot air cotton conveying roller; the first non-woven fabric conveying roller is used for conveying non-woven fabrics to the hot pressing roller in a rolling mode, and the first hot air cotton conveying roller is used for conveying hot air cotton to the hot pressing roller in a rolling mode.
In the technical scheme, the upper base fabric conveying roller group comprises a second hot air cotton conveying roller, a melt-blown fabric conveying roller and a second non-woven fabric conveying roller; the hot-blast cotton conveying roller of second is used for rolling to the hot-pressing roller and carries hot-blast cotton, and the melt blown fabric conveying roller rolls to the hot-pressing roller and carries the melt blown fabric, and the second non-woven fabrics conveying roller is used for rolling to the hot-pressing roller and carries the non-woven fabrics.
Compared with the prior art, the invention has the beneficial effects that:
the total carbon discharge amount is set to be 100-500 g/m2(preferably, the total carbon dropping amount is 200-400 g/m2) The charcoal material adopts broken active carbon, simultaneously through adopting fan-shaped straight line to spray viscose mode and adopting the double-deck carbon cloth that obtains of the mode of charcoal down, not only significantly reduced the air resistance who presss from both sides the carbon cloth, still improved filtration bactericidal effect.
Drawings
FIG. 1 is a schematic structural diagram of a carbon cloth-sandwiched carbon cloth preparation process with nano-silver moxa carbon according to the present invention;
FIG. 2 is a cross-sectional view of a carbon-impregnated cloth according to the present invention;
in the figure, 1, a lower backing cloth conveying roller group; 1.1, a first nonwoven fabric conveying roller; 1.2, a first hot air cotton conveying roller; 2. an upper base fabric conveying roller set; 2.1, a second hot air cotton conveying roller; 2.2, melt-blown fabric conveying rollers; 2.3, a second non-woven fabric conveying roller; 3. a first glue spray gun; 4. a first activated carbon sprinkling device; 5. a second glue spray gun; 6. a second activated carbon sprinkling device; 7. a third glue spray gun; 8. a hot press roll;
100. an upper base fabric; 200. a lower layer of back lining cloth; 300. and (4) carbon materials.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example 1
The embodiment provides a preparation process of carbon-sandwiched cloth with nano-silver moxa carbon, which comprises the following steps:
sequentially winding a lower backing fabric along the output direction of a production line; the lower-layer back lining cloth is sequentially provided with hot air cotton and non-woven fabric from top to bottom, namely the non-woven fabric is firstly unreeled and then unreeled;
step two, sequentially carrying out primary glue spraying, primary carbon material spraying, secondary glue spraying and secondary carbon material spraying on the lower-layer back lining cloth on the assembly line; the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 355g/m2The proportion of the primary carbon scattering material to the secondary carbon discharging material is 1: 0.6 to 1.5;
thirdly, spraying glue for the third time after secondary carbon scattering, and then winding the upper-layer base fabric along the output direction of the production line; the upper-layer base fabric comprises non-woven fabric, melt-blown fabric and hot air cotton from top to bottom in sequence, namely the hot air cotton, the melt-blown fabric and the non-woven fabric are unreeled in sequence;
step four, carrying out hot-pressing compounding on the upper-layer base cloth, the lower-layer back lining cloth and an activated carbon layer formed between the upper-layer base cloth and the lower-layer back lining cloth at a hot-pressing roller of a compounding machine, so that the upper-layer base cloth and the lower-layer back lining cloth are bonded and fixed into a whole to form carbon-sandwiched cloth with nano-silver moxa carbon;
step five, cooling, slitting and winding the charcoal-sandwiched cloth obtained in the step four to obtain a finished product; in the finished product of the carbon-sandwiched cloth with the nano silver moxa carbon, the upper-layer base cloth is an air inlet surface, and the lower-layer base cloth is an air outlet surface;
wherein the glue spraying adopts fan-shaped linear spraying, the output speed of the production line is 5-15 m/min, and the preferred output speed of the production line is 5 m/min;
in the second step, the carbon material comprises nano-silver moxa carbon and activated carbon, wherein the nano-silver moxa carbon accounts for 1.2-1.5% of the total amount of the carbon material; for example, the total carbon amount of the primary carbon-scattering material and the secondary carbon-scattering material is 355g/m2Namely 5g of nano silver moxa carbon/350 g of activated carbon; the nano silver moxa carbon is nanometer silver loaded moxa activated carbon, and the moxa activated carbon is biological activated carbon produced by using moxa stems or moxa sticks; the activated carbon comprises any one of bamboo activated carbon, coconut shell activated carbon or walnut shell activated carbon. The moxa activated carbon, the bamboo activated carbon, the coconut shell activated carbon and the walnut shell activated carbon are all broken activated carbon, and the particle size of the broken activated carbon is 30-60 meshes.
In the embodiment, the surface temperature of the hot pressing roller is 120-250 ℃ during hot pressing and compounding; the melting points of the upper layer of base cloth and the lower layer of back lining cloth are not lower than 200 ℃.
In this embodiment, the glue spraying in the second step and the third step is performed by using a low-pressure atomizing spray gun.
As shown in fig. 1 and 2, the present embodiment provides an apparatus based on a process for preparing carbon-sandwiched cloth with nano-silver moxa, comprising: the lower-layer backing cloth conveying roller set 1, the upper-layer base cloth conveying roller set 2, the first glue spray gun 3, the first activated carbon sprinkling device 4, the second glue spray gun 5, the second activated carbon sprinkling device 6, the third glue spray gun 7 and a hot pressing roller 8 of a compound machine;
the lower-layer backing cloth conveying roller group 1 conveys the lower-layer backing cloth 200 to the hot pressing roller 8 in a rolling manner, and the upper-layer base cloth conveying roller group 2 conveys the upper-layer base cloth 100 to the hot pressing roller 8 in a rolling manner; the first glue spray gun 3, the first activated carbon sprinkling device 4, the second glue spray gun 5, the second activated carbon sprinkling device 6 and the third glue spray gun 7 are sequentially arranged between the lower-layer back lining cloth conveying roller set 1 and the upper-layer base cloth conveying roller set 2 along the output direction of the production line;
the first glue spray gun 3, the second glue spray gun 5 and the third glue spray gun 7 spray glue on the surface of the lower backing cloth conveyed from the lower backing cloth conveying roller group 1 to the hot pressing roller 8; the first activated carbon sprinkling device 4 and the second activated carbon sprinkling device 6 are arranged above the lower-layer back lining cloth 200, and carbon materials 300 are sprinkled towards the surface, which is sprayed with glue, of the lower-layer back lining cloth conveyed to the hot pressing roller 8 by the lower-layer back lining cloth conveying roller group 1;
the hot-pressing roller 8 is used for hot-pressing and compounding the surface of the lower-layer back lining cloth 200 sprayed with the carbon material 300 and the upper-layer base cloth 100, so that the upper-layer base cloth 100 and the lower-layer back lining cloth 200 are bonded and fixed into a whole to form carbon-sandwiched cloth with nano silver and moxa carbon;
in this embodiment, the lower backing cloth conveying roller group 1 includes a first nonwoven cloth conveying roller 1.1 and a first hot air cotton conveying roller 1.2; the first nonwoven fabric conveying roller 1 conveys nonwoven fabrics to the hot pressing roller 8 in a rolling manner, and the first hot air cotton conveying roller 2 conveys hot air cotton to the hot pressing roller 8 in a rolling manner;
the upper base fabric conveying roller group 2 comprises a second hot air cotton conveying roller 2.1, a melt-blown fabric conveying roller 2.2 and a second non-woven fabric conveying roller 2.3; the hot-air cotton conveying roller 2.1 of the second roll conveys hot-air cotton to the hot-pressing roller 8, the melt-blown fabric conveying roller 2.2 rolls conveys melt-blown fabric to the hot-pressing roller 8, and the non-woven fabric conveying roller 2.3 rolls conveys non-woven fabric to the hot-pressing roller 8.
Example 2
This example is similar to example 1, except that: the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 200g/m2。
Example 3
This example is similar to example 1, except that: the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 400g/m2。
Example 4
This example is similar to example 1, except that: the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 50g/m2。
Example 5
This example is similar to example 1, except that: the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 600g/m2。
Example 6
This example is similar to example 1, except that: scattering carbon materials into granular carbon in the second step; namely, the moxa activated carbon, the bamboo activated carbon, the coconut shell activated carbon and the walnut shell activated carbon are all granular activated carbon, and the particle size of the granular activated carbon is 30-60 meshes.
Example 7
This example is similar to example 1, except that: in this example, carbon was scattered only once, and the total carbon amount was 355g/m2。
Example 8
This example is similar to example 1, except that: in the embodiment, circular spraying is adopted for glue spraying.
Example 9
Chinese patents are adopted: 200610053595.2A carbon-sandwiched non-woven fabric filter material is prepared by the method.
The carbon-sandwiched cloth as a filtering component is applied to a filter or a filtering prototype for performance detection, and the method comprises the following detection methods:
firstly, the carbon-sandwiched cloth obtained in the embodiments 1 to 9 is subjected to an air resistance test, the specific test is carried out at the microbiological research institute in Guangzhou city, the detection is carried out according to the regulations of the efficiency and the resistance of the GB/T6165-2008 high-efficiency air filter performance test method, and the specific steps are as follows: 1) the test conditions are as follows: ambient temperature: 25.8 ℃, the ambient humidity is 57 percent RH, and the test air volume is 300m3H; experimental equipment: an air duct type purification system testing device;
2) the testing steps are as follows: a. performing appearance detection on a filter to be detected (any carbon-sandwiched cloth in embodiments 1-8), and installing the filter to be detected on an air duct according to standard requirements after the filter is qualified; b. adjusting the air duct type purification system testing device to a working state, adjusting the temperature in the system to 23 +/-5 ℃, and measuring the resistance of the filter clamp under the test air volume; c. placing the filter to be tested on an experiment table according to requirements, and testing the resistance of the filter section under the same test component; d. and subtracting the resistance of the filter clamp from the measured resistance of the filter segment to obtain the resistance of the filter. The resistance of the carbon-sandwiched cloth obtained in examples 1 to 8 was measured according to the test procedure, and is specifically shown in table 1;
TABLE 1
| Group of | Total carbon output (g/m2) | Shape of carbon material | Number of charcoal removals | Glue spraying mode | Air resistance/Pa |
| Example 1 | 355 | Broken activated |
2 times (one time) | Fan shaped linear jet | 3.27 |
| Example 2 | 200 | Broken activated |
2 times (one time) | Fan shaped linear jet | 3.06 |
| Example 3 | 400 | Broken activated |
2 times (one time) | Fan shaped linear jet | 3.87 |
| Example 4 | 50 | Broken activated |
2 times (one time) | Fan shaped linear jet | 2.45 |
| Example 5 | 600 | Broken activated |
2 times (one time) | Fan shaped linear jet | 24.54 |
| Example 6 | 355 | Granular activated |
2 times (one time) | Fan shaped linear jet | 28.15 |
| Example 7 | 355 | Broken activated |
1 time of | Fan shaped linear jet | 12.84 |
| Example 8 | 355 | Broken activated |
2 times (one time) | Circular spray | 23.51 |
| Example 9 | / | / | / | / | >30 |
As can be seen from Table 1, in examples 1 to 5, when the total carbon dropping amount reaches 600g/m2, the air resistance is greatly increased, and the air resistance of the carbon-sandwiched cloth provided by the present example is below 3.87 Pa; compared with the embodiment 6, the embodiment 1 shows that the shape of the carbon material adopts the broken activated carbon, so that the air resistance of the carbon-sandwiched cloth is greatly reduced; embodiment 1, embodiment 7, and embodiment 8 show that the method of putting charcoal for many times is adopted in the present invention, so that the charcoal material is more uniform, the thickness of the charcoal-sandwiched cloth is easier to control, and the air resistance of the charcoal-sandwiched cloth is reduced; compared with the prior art, the method for preparing the carbon black of the invention has the advantages that the total carbon dropping amount is set to be 100-500 g/m in the embodiment 1 and the embodiment 92(preferably, the total carbon dropping amount is 200-400 g/m2) The charcoal material adopts broken active carbon, and the air resistance of the charcoal cloth is greatly reduced by adopting a fan-shaped linear viscose spraying mode and adopting a mode of twice charcoal discharging, so that the air resistance of the charcoal cloth is below 3.87 Pa.
Secondly, the carbon-sandwiched cloth obtained in the examples 1 to 9 is subjected to an air sterilization performance evaluation test, a formaldehyde removal rate test and a PM2.5 removal rate test, the tests are specifically carried out in microorganism research institute in Guangzhou city, and the tests are carried out according to the special requirements of an air purifier with antibacterial, degerming and purifying functions of GB 21551.3-2010 household and similar appliances,
the air sterilization performance evaluation test comprises the following specific steps: 1) test equipment: the strain is staphylococcus albus, the microbial aerosol generator TK-3, the culture medium is a common nutrient agar culture medium, and the sampler is a six-level sieve mesh air impact type sampler; and (3) testing conditions are as follows: test chamber volume 30m3The ambient temperature is 20-25 ℃ and the ambient humidity is 50-70% RH;
2) the testing steps are as follows: a. taking a 4 th-5 th generation bacterial slant culture cultured at 37 ℃ for 24 hours, repeatedly blowing and washing a bacterial lawn by using 10ml of nutrient broth, filtering by using sterile filter cotton, and diluting the bacterial lawn to a proper concentration by using the nutrient broth to prepare a mist bacterial suspension; b. respectively placing experimental equipment into two aerosol chambers at one time, closing a door, opening a high-efficiency filter for purification, and simultaneously adjusting the temperature (20-25) DEG C and the humidity (50-70)% RH of the two aerosol chambers; c. starting a microbial aerosol generator to carry out spray contamination, continuously stirring for 10min by a fan after the microbial aerosol generator is finished, and then standing for 15 min; d. simultaneously, sampling the experimental group and the control group by using six-level sieve mesh air impact type samplers respectively; e. starting a prototype to be detected by the test group, acting for 60min for sampling, and sampling the control group at a corresponding time period; f. taking 2 parts of unused culture medium in the same batch, and culturing the culture medium and the sample sampled in the test at the same time to be used as negative control; g. the test specimen was repeated 3 times, and the arithmetic mean of the 3 test results was the final test result.
3) Formula for calculation
Natural rate of extinction
Wherein, V0Air bacteria content, V, before experiment as a control group0' is air bacteria content after experiment of control group;
bacteria removal rate
Wherein, V1Air bacteria content, V, before experiment for test group2The air bacterial content after the experiment of the test group is shown;
the formaldehyde removal rate test comprises the following specific steps: 1) the test conditions are as follows: ambient temperature: (25 + -2) ° c, ambient humidity (50 + -10)% RH; test equipment: test chamber (30 m)3) The device comprises an intelligent constant-current atmospheric sampler, an ultraviolet-visible spectrophotometer and a formaldehyde detector; 2) the testing steps are as follows: a. and placing a prototype to be detected in the test cabin according to standard requirements. Adjusting the prototype to a test working state, checking that the operation is normal, and then closing the prototype; b. starting a high-efficiency air filter, purifying indoor air, and starting a temperature control device after the background concentration of pollutants in the cabin is reduced to a certain level to enable the temperature and the relative humidity in the cabin to reach a test specified state; c. adding a certain amount of gaseous pollutant gas into the test chamber by using a gaseous pollutant generating device, and closing the generator after the concentration of the gaseous pollutant reaches an initial concentration range specified by an experiment; d. starting a fan in the test chamber, stirring for 10min, and closing the fan after uniform mixing; e. when the fan stops rotating, collecting an initial concentration sample, and recording the initial concentration sample as C0(ii) a f. After the initial concentration sample is collected, starting a sample machine to be detected, starting the test, acting for 60min, collecting a final concentration sample of the test, and recording as C1(ii) a g. And (f) installing the steps a to f, and testing natural attenuation without opening a prototype.
3) Formula for calculation
Natural attenuation rate of formaldehyde
Wherein, C0' initial concentration of control group, C1' is the final concentration of the control group;
total attenuation of formaldehyde
Wherein, C0Initial concentration for test group, C1Is the final concentration of the test group;
removal rate of formaldehyde
(III) PM2.5The removal rate test comprises the following specific steps: 1) test objects: cigarette smoke as PM2.5The tested particle size range of the dust source is (0.1-2.5) um particulate matter total number; the test conditions are as follows: ambient temperature: (25 + -2) ° c, ambient humidity (50 + -10)% RH; test equipment: test chamber (30 m)3) A particle size spectrometer (TSI 3340) and a diluter (TSI 3302A);
2) the testing steps are as follows: a. and placing a prototype to be detected in the test cabin according to standard requirements. Adjusting the prototype to a test working state, checking that the operation is normal, and then closing the prototype; b. starting a high-efficiency air filter to purify the air in the cabin, so that the background concentration of the particle concentration of the particles with the particle size of more than 0.1um is less than or equal to 2 multiplied by 104Starting a temperature and humidity control device simultaneously to enable the temperature and the humidity in the cabin to reach a test specified state; c. and recording the background concentration value when the background concentration of the particles in the cabin is reduced to a proper level. Closing the high-efficiency air filter and the temperature and humidity device; d. connect the cigarette burner, light the cigarette, cover the burner, blow the cigarette smog into the test chamber with the low-pressure air. After the smoke generation is finished, the fan continues to stir for 2min, so that particles in the cabin are uniformly mixed, and then the mixing fan is turned off; e. after the fan stops rotating for 3min, the particle size spectrometer is started to measure the initial concentration C of the particles0The concentration should reach (2.4-3.5) x 107/L; f. after the initial concentration is measured, starting a sample machine to be detected, acting for 60min, and measuring the final concentration of the particles, wherein the final concentration is marked as C1; g. and (f) installing the steps a to f, and testing natural attenuation without opening a prototype.
3) Formula for calculation
4)PM2.5Natural rate of decay
Wherein, C0' initial concentration of control group, C1' is the final concentration of the control group;
5)PM2.5removal rate
Wherein, C0Initial concentration for test group, C1Is the final concentration of the test group;
the charcoal-sandwiched cloth obtained in the embodiments 1 to 9 is detected by adopting the air sterilization performance evaluation test, the formaldehyde removal rate test and the PM2.5 removal rate test in the above (one) to (three), and the detection mode is that the charcoal-sandwiched cloth obtained in the embodiments 1 to 9 is used as a filter component and applied to a filter prototype as a test group, and a product with the same model and batch as the tested filter prototype is removed, or all parts with sterilization and disinfection functions are set to be in an inoperative state.
Taking the test data of example 1 as an example, the data statistics of the air sterilization performance, the formaldehyde removal rate and the PM2.5 removal rate of the carbon-sandwiched cloth of example 1 are respectively shown in table 2, table 3 and table 4;
the air sterilization performance, formaldehyde removal rate and PM2.5 removal rate of the carbon-sandwiched fabrics of examples 1-8 are shown in Table 5;
TABLE 2
TABLE 3
TABLE 4
TABLE 5
As can be seen from tables 2 to 5, when the total amount of carbon dropped reached 600g/m2When the air filter is used, the air resistance is greatly increased, and the air filtering and sterilizing effect in the cabin is weakened; the total carbon amount is 50g/m2When the air resistance is low, the carbon material contained in the air resistance has insufficient effect of sterilizing and removing formaldehyde; the carbon-sandwiched cloth provided by the embodiments 1-3 has small air resistance, and the contained carbon material has good air filtering and sterilizing effects on the air in the cabin; compared with the embodiments 6, 7 and 8, the embodiment 1 has the advantages that the shape of the carbon material adopts the crushed active carbon, the carbon is discharged for multiple times and the fan-shaped linear injection mode, so that the requirements of fixing the carbon material are met, the obstruction of viscose on wind power is reduced, the loss of the activity of the carbon material is reduced, and the air filtering and sterilizing effect in the cabin is good; compared with the prior art, the method for preparing the carbon black of the invention has the advantages that the total carbon dropping amount is set to be 100-500 g/m in the embodiment 1 and the embodiment 92(preferably, the total carbon dropping amount is 200-400 g/m2) The charcoal material adopts broken active carbon, simultaneously through adopting fan-shaped straight line to spray viscose mode and adopting the double-deck carbon cloth that obtains of the mode of charcoal down, not only significantly reduced the air resistance who presss from both sides the carbon cloth, still improved filtration bactericidal effect.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A preparation process of carbon-sandwiched cloth with nano silver moxa carbon is characterized by comprising the following steps:
sequentially winding a lower backing fabric along the output direction of a production line;
step two, sequentially carrying out primary glue spraying, primary carbon material spraying, secondary glue spraying and secondary carbon material spraying on the lower-layer back lining cloth on the assembly line;the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 100-500 g/m2The proportion of the primary carbon scattering material to the secondary carbon discharging material is 1: 0.6 to 1.5;
thirdly, spraying glue for the third time after secondary carbon scattering, and then winding the upper-layer base fabric along the output direction of the production line; wherein the upper base fabric comprises melt-blown fabric;
step four, carrying out hot-pressing compounding on the upper-layer base cloth, the lower-layer back lining cloth and the activated carbon layer formed between the upper-layer base cloth and the lower-layer back lining cloth, so that the upper-layer base cloth and the lower-layer back lining cloth are bonded and fixed into a whole to form carbon-sandwiched cloth with nano silver moxa carbon;
step five, cooling, slitting and winding the charcoal-sandwiched cloth obtained in the step four to obtain a finished product;
wherein, the glue spraying adopts fan-shaped linear spraying, and the output speed of the production line is 5-15 m/min.
2. The process for preparing carbon-sandwiched cloth with nano-silver moxa charcoal according to claim 1, wherein the lower back lining cloth is sequentially made of hot air cotton and non-woven fabric from top to bottom, and the upper base cloth is sequentially made of non-woven fabric, melt-blown cloth and hot air cotton from top to bottom.
3. The preparation process of the carbon-sandwiched cloth with the nano-silver moxa carbon, according to claim 1, is characterized in that in the second step, the carbon material comprises the nano-silver moxa carbon and activated carbon, and the nano-silver moxa carbon accounts for 1.2-1.5% of the total amount of the carbon material; the nano silver moxa carbon is nanometer silver loaded moxa activated carbon, and the activated carbon comprises any one of bamboo activated carbon, coconut shell activated carbon or walnut shell activated carbon.
4. The preparation process of the carbon-sandwiched cloth with the nano-silver moxa carbon, according to claim 3, is characterized in that the nano-silver moxa carbon and the activated carbon in the carbon material are crushed activated carbon, and the particle size of the crushed activated carbon is 30-60 meshes.
5. The carbon-sandwiched cloth with nano-silver moxa charcoal as claimed in claim 1The preparation process is characterized in that the total carbon dropping amount of the primary carbon spreading material and the secondary carbon spreading material is 200-400 g/m2。
6. The process for preparing carbon-sandwiched cloth with nano-silver moxa carbon according to claim 1, wherein in the fourth step, the surface temperature of a hot-pressing roller during hot-pressing compounding is 120-250 ℃; the melting points of the upper layer of base cloth and the lower layer of back lining cloth are not lower than 200 ℃.
7. The process for preparing carbon-sandwiched cloth with nano-silver moxa charcoal according to claim 1, wherein in the second step and the third step, the glue spraying is performed by using a low-pressure atomization spray gun.
8. The equipment for preparing the carbon-sandwiched cloth with the nano-silver moxa carbon is characterized by comprising the following components in parts by weight: the lower-layer back lining cloth conveying roller set (1), the upper-layer base cloth conveying roller set (2), a first glue spray gun (3), a first activated carbon sprinkling device (4), a second glue spray gun (5), a second activated carbon sprinkling device (6), a third glue spray gun (7) and a hot pressing roller (8);
the lower-layer backing cloth conveying roller set (1) is used for conveying the lower-layer backing cloth (100) to the hot press roller (8) in a rolling manner, and the upper-layer base cloth conveying roller set (2) is used for conveying the upper-layer base cloth (200) to the hot press roller (8) in a rolling manner;
the first glue spray gun (3), the first activated carbon sprinkling device (4), the second glue spray gun (5), the second activated carbon sprinkling device (6) and the third glue spray gun (7) are sequentially arranged between the lower-layer backing cloth conveying roller set (1) and the upper-layer base cloth conveying roller set (2) along the output direction of the production line; the first glue spray gun (3), the second glue spray gun (5) and the third glue spray gun (7) are all arranged above the lower-layer back lining cloth (100) and are used for spraying glue on the upper surface of the lower-layer back lining cloth (100) conveyed to the hot pressing roller (8) by the lower-layer back lining cloth conveying roller set (1); the first activated carbon sprinkling device (4) and the second activated carbon sprinkling device (6) are arranged above the lower-layer back lining cloth (100) and are used for sprinkling carbon materials (300) towards the upper surface of the lower-layer back lining cloth (100) which is conveyed to the hot pressing roller (8) by the lower-layer back lining cloth conveying roller set (1) and sprayed with glue;
the hot-pressing roller (8) is used for hot-pressing and compounding the surface of the lower-layer back lining cloth (100) sprayed with the carbon material (300) and the upper-layer base cloth (200) so that the upper-layer base cloth (200) and the lower-layer back lining cloth (100) are bonded and fixed into a whole to form the carbon-sandwiched cloth with the nano-silver moxa carbon.
9. The equipment of the carbon-sandwiched cloth preparation process with nano-silver moxa carbon in the claim 8 is characterized in that the lower backing cloth conveying roller group (1) comprises a first non-woven cloth conveying roller (1.1) and a first hot air cotton conveying roller (1.2); the first nonwoven fabric conveying roller (1) is used for conveying nonwoven fabrics to the hot pressing roller (8) in a rolling mode, and the first hot air cotton conveying roller (2) is used for conveying hot air cotton to the hot pressing roller (8) in a rolling mode.
10. The equipment for preparing the carbon-sandwiched cloth with the nano-silver moxa carbon is characterized in that the upper base cloth conveying roller group (2) comprises a second hot air cotton conveying roller (2.1), a melt-blown cloth conveying roller (2.2) and a second non-woven cloth conveying roller (2.3); the hot-blast cotton conveying roller of second (2.1) is used for rolling to hot-pressing roller (8) and carries the hot-blast cotton, and melt blown fabric conveying roller (2.2) are used for rolling to hot-pressing roller (8) and carry the melt blown fabric, and second non-woven fabrics conveying roller (2.3) are used for rolling to hot-pressing roller (8) and carry the non-woven fabrics.
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