CN103541279A - Glass fiber air filter paper with high dust holding capacity and production process thereof - Google Patents
Glass fiber air filter paper with high dust holding capacity and production process thereof Download PDFInfo
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Abstract
The invention discloses glass fiber air filter paper with high dust holding capacity, which is prepared from alkali-free glass fiber chopped strands and alkali-free glass fiber cotton in the diameter of 0.3-0.4 mu m, as well as an adhesive, wherein the glass fiber air filter paper comprises 3-8 parts by weight of the alkali-free glass fiber chopped strands and 92-97 parts by weight of the alkali-free glass fiber cotton, and the adhesive is a water repellent containing fluorocarbon. The invention further discloses a production process of the glass fiber air filter paper with the high dust holding capacity, and the production process comprises the following steps: firstly beating and dispersing raw material to obtain pulp, then performing wet process forming on the pulp to obtain wet paper, removing water in the wet paper, then performing two-sided sizing on the dehydrated wet paper, and finally drying to obtain a product, wherein the beating degree during beating is 52-56 degrees SR, suction dehydration is performed in three stages, and drying treatment is performed in four stages. The glass fiber air filter paper disclosed by the invention has the advantages of smooth and uniform surface, large specific surface area and dust holding capacity, high mechanical strength and resistance to acid and alkali corrosion.
Description
Technical field
The invention belongs to field of air filtration, relate to a kind of air filter module, particularly the technique of a kind of high dust containing capacity glass fibre air filter paper and this high dust containing capacity glass fibre air filter paper of production.
Background technology
The application of air cleaner is very extensive, but now widely used air cleaner all exists, dust containing capacity is low, service life is short, the shortcoming of replacing program trouble, is that the strainability of filter filter paper used is poor and cause the main cause of the problems referred to above, and dust containing capacity is low.Glass fibre air filter paper is to take glass fibre as main raw material(s), generally adopts wet therapy forming process to make, and it has the features such as fiber is evenly distributed, resistance is little, intensity is large, is a kind of desirable air filting material.But common glass fibre air filter paper also exists dust containing capacity low, the shortcoming that service life is short.
Summary of the invention
In view of this, the invention provides and a kind ofly there is the glass fibre air filter paper of high dust containing capacity and produce this glass fibre air filter paper technique.
For achieving the above object, the invention provides following technical scheme: alkali-free glass fibre cotton and bonding sizing material that high dust containing capacity glass fibre air filter paper of the present invention is 0.3-0.4um by the chopped silk of alkali-free glass fibre and diameter are made.
Further, in described high dust containing capacity glass fibre air filter paper, the parts by mass of the chopped silk of alkali-free glass fibre is 3-8 part, and the parts by mass of alkali-free glass fibre cotton is 92-97 part.
Further, the hydrophober that described bonding sizing material is fluorine-containing carbon.
The present invention produces the technique of high dust containing capacity glass fibre air filter paper, comprises the following steps:
(1) raw material is prepared: get respectively the chopped silk of 3-8 part alkali-free glass fibre and 92-97 part alkali-free glass fibre cotton;
(2) disperse slurrying: add making beating in disperser to disperse to obtain slurry the selected raw material of step (1), regulating the pH value of slurry is 2.9-3.2, and to regulate stock quality concentration be 1%～1.5%;
(3) wet moulding: pass on step (2) gained slurry to storage pool, to be diluted to mass concentration be 0.1%～0.15% and regulate PH to 2.8～3, then the slurry of storage pool is delivered to moulding on former and obtains l Water Paper;
(4) suction dehydration: step (3) gained l Water Paper is carried out to processed, make moisture percentage be less than 40%;
(5) spraying sizing material: the l Water Paper after the dehydration of step (4) gained is carried out to two-sided applying glue processing;
(6) dry processing: the l Water Paper after dry treatment step (5) glue spraying.
When further, described step (2) is disperseed slurrying, beating degree is 54 ° of SR.
Further, the chopped silk of described alkali-free glass fibre is adopted with the following method and is made: first e-glass marble is heated to 1600～1800 ℃ of meltings, then the melting e-glass marble of jetting obtains glass fibre, finally cuts gained glass fibre and obtains the chopped silk that length is consistent.
Further, described step (4) suction dehydration is carried out in three stages, and the vacuum of first stage is 0.02MPa, and the vacuum of second stage is 0.03MPa, and the vacuum of phase III is 0.07Mpa.
Further, the dry processing of described step (6) is carried out in four stages, and temperature when first paragraph is dry is 250 ℃, and temperature when second segment is dry is 280 ℃, the 3rd section of temperature when dry is 260 ℃, and the 4th section of employing drying cylinder makes the final moisture content of product lower than 0.1%.
Beneficial effect of the present invention is: (1) glass fibre air filter paper of the present invention main body adopts the chopped silk of alkali-free and alkali-free glass fibre cotton, and its mechanical strength is good, stable chemical performance, and water imbibition is low, is applicable to varying environment; (2) in the present invention, alkali-free glass fibre diameter is 0.3-0.4um, and its specific area is large, and the dust containing capacity of obtained filter paper is large; (3) sizing material that bonds in the present invention is selected the hydrophober of fluorine-containing carbon, and fluorine-containing carbon hydrophober good penetrability, is gathered in the Nodes of fiber during use, and does not form glued membrane, does not affect the gas permeability of obtained filter paper; (4) the present invention select the chopped silk of alkali-free glass fibre and alkali-free glass fibre cotton ratio suitable, in water, can be good at dispersed, realize the good combination between fiber and interweave, prepared air filter paper is fluffy, porosity is high, has further increased the dust containing capacity of product; (5) production technology of the present invention is dry processes minutes four sections and carries out, and by controlling temperature, product is shunk evenly in dry run; (6) production technology wet moulding sizing concentration of the present invention is low, and before applying glue, the humidity of l Water Paper is less than 40%, can guarantee the surfacing of glass fibre air filter paper and the uniformity that make.
The specific embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1:
The present embodiment is produced the technique of high dust containing capacity glass fibre air filter paper, comprises the following steps:
(1) raw material is prepared: get respectively 5 parts of chopped silks of alkali-free glass fibre and 95 parts of alkali-free glass fibre cottons that diameter is 0.3um;
(2) disperse slurrying: add making beating in the disperser that aqueous sulfuric acid is housed to disperse 12min to obtain slurry the selected raw material of step (1), then by regulating the amount of sulfuric acid and water to regulate the pH value to 3.0 of slurry, mass concentration to 1%, 54 ° of SR of beating degree in the present embodiment.
(3) wet moulding: pass on step (2) gained slurry to storage pool, be diluted with water to mass concentration and be 0.1% and regulate PH to 2.9, slag inclusion in the slurry of then going out after dilution with centrifugal slag remover, is finally delivered to the slurry of storage pool moulding on oblique net former and obtains l Water Paper; In order to guarantee that filter paper will keep uniformity, stability, the uniformity of thickness when the moulding, adopts low concentration starching during the present embodiment moulding.
(4) suction dehydration: step (3) gained l Water Paper is carried out to processed, make moisture percentage be less than 40%; In order to guarantee that filter paper will keep uniformity, stability, the uniformity of thickness when the moulding, the present embodiment adopts the vacuum draw dehydration of three stages, the main purpose of first stage is slight dehydration, vacuum is 0.02MPa, the main purpose of second stage is to guarantee that waterline is not beneficial long, guarantee the uniformity of filter paper outward appearance, the water yield of suction reaches 40%, therefore vacuum is 0.03MPa, phase III is mainly to control the humidity enter drying room to be less than 40%, so need larger suction force, vacuum is 0.07MPa.
(5) spraying sizing material: the l Water Paper after the dehydration of step (4) gained is carried out to two-sided applying glue processing; The present embodiment adopts the l Water Paper of step (4) is passed through to the method applying glue of steeping vat, and makes sizing material spread upon uniformly filter paper surface by controlling l Water Paper speed, the hydrophober that the present embodiment institute applying glue material is fluorine-containing carbon.
(6) dry processing: the l Water Paper after baking step (5) glue spraying, in order fully to improve the utilization rate of heat, in the present embodiment, drying room length used is 32-36 rice, divides three sections and is dried, and first paragraph baking temperature is 250 ℃, this stage is because l Water Paper has just entered drying room, humidity is too high, does not carry out integral body circulation, is only limited to the inner loop of first paragraph, constantly supplement new thermal source simultaneously, get rid of 40～60% moisture; The temperature of second segment is 280 ℃, and the temperature of the 3rd section is 260 ℃, and second stage and phase III all adopt complete alternation, and supplements new thermal source at any time.After above-mentioned three stages, be also provided with drying cylinder, filter paper is dried and is bleached.
In the present embodiment, drying room adopts direct-fired method, the filter paper of drying room inside is carried out to tow sides dry simultaneously, and filter paper only needs 3～5 minutes from entering drying room to going out drying room drying, and the humidity of filter paper drops to 0.1% from 99.9%.
Embodiment 2:
The present embodiment is produced the technique of high dust containing capacity glass fibre air filter paper, comprises the following steps:
(1) raw material is prepared: get respectively 3 parts of chopped silks of alkali-free glass fibre and 97 parts of alkali-free glass fibre cottons that diameter is 0.35um;
(2) disperse slurrying: add making beating in the disperser that aqueous sulfuric acid is housed to disperse 10min to obtain slurry the selected raw material of step (1), then by regulating the amount of sulfuric acid and water to regulate the pH value to 3.2 of slurry, mass concentration to 1.3%, 52 ° of SR of beating degree in the present embodiment.
(3) wet moulding: pass on step (2) gained slurry to storage pool, be diluted with water to mass concentration and be 0.13% and regulate PH to 3.0, slag inclusion in the slurry of then going out after dilution with centrifugal slag remover, is finally delivered to the slurry of storage pool moulding on oblique net former and obtains l Water Paper; In order to guarantee that filter paper will keep uniformity, stability, the uniformity of thickness when the moulding, adopts low concentration starching during the present embodiment moulding.
(4) suction dehydration: step (3) gained l Water Paper is carried out to processed, make moisture percentage be less than 40%; In order to guarantee that filter paper will keep uniformity, stability, the uniformity of thickness when the moulding, the present embodiment adopts the vacuum draw dehydration of three stages, the main purpose of first stage is slight dehydration, vacuum is 0.02MPa, the main purpose of second stage is to guarantee that waterline is not beneficial long, guarantee the uniformity of filter paper outward appearance, the water yield of suction reaches 40%, therefore vacuum is 0.03MPa, phase III is mainly to control the humidity enter drying room to be less than 40%, so need larger suction force, vacuum is 0.07MPa.
(5) spraying sizing material: the l Water Paper after the dehydration of step (4) gained is carried out to two-sided applying glue processing; The present embodiment adopts the l Water Paper of step (4) is passed through to the method applying glue of steeping vat, and makes sizing material spread upon uniformly filter paper surface by controlling l Water Paper speed.
(6) dry processing: the l Water Paper after baking step (5) glue spraying, in order fully to improve the utilization rate of heat, in the present embodiment, drying room length used is 32-36 rice, divides three sections and is dried, and first paragraph baking temperature is 250 ℃, this stage is because l Water Paper has just entered drying room, humidity is too high, does not carry out integral body circulation, is only limited to the inner loop of first paragraph, constantly supplement new thermal source simultaneously, get rid of 40～60% moisture; The temperature of second segment is 280 ℃, and the temperature of the 3rd section is 260 ℃, and second stage and phase III all adopt complete alternation, and supplements new thermal source at any time.After above-mentioned three stages, be also provided with drying cylinder, filter paper is dried and is bleached.In the present embodiment, drying room adopts direct-fired method, the filter paper of drying room inside is carried out to tow sides dry simultaneously, and filter paper only needs 3～5 minutes from entering drying room to going out drying room drying, and the humidity of filter paper drops to 0.1% from 99.9%.
Embodiment 3:
The present embodiment is produced the technique of high dust containing capacity glass fibre air filter paper, comprises the following steps:
(1) raw material is prepared: get respectively 7 parts of chopped silks of alkali-free glass fibre and 93 parts of alkali-free glass fibre cottons that diameter is 0.4um;
(2) disperse slurrying: add making beating in the disperser that aqueous sulfuric acid is housed to disperse 15min to obtain slurry the selected raw material of step (1), then by regulating the amount of sulfuric acid and water to regulate the pH value to 2.9 of slurry, mass concentration to 1.5%, 56 ° of SR of beating degree in the present embodiment.
(3) wet moulding: pass on step (2) gained slurry to storage pool, be diluted with water to mass concentration and be 0.15% and regulate PH to 2.8, slag inclusion in the slurry of then going out after dilution with centrifugal slag remover, is finally delivered to the slurry of storage pool moulding on oblique net former and obtains l Water Paper; In order to guarantee that filter paper will keep uniformity, stability, the uniformity of thickness when the moulding, adopts low concentration starching during the present embodiment moulding.
(4) suction dehydration: step (3) gained l Water Paper is carried out to processed, make moisture percentage be less than 40%; In order to guarantee that filter paper will keep uniformity, stability, the uniformity of thickness when the moulding, the present embodiment adopts the vacuum draw dehydration of three stages, the main purpose of first stage is slight dehydration, vacuum is 0.02MPa, the main purpose of second stage is to guarantee that waterline is not beneficial long, guarantee the uniformity of filter paper outward appearance, the water yield of suction reaches 40%, therefore vacuum is 0.03MPa, phase III is mainly to control the humidity enter drying room to be less than 40%, so need larger suction force, vacuum is 0.07MPa.
(5) spraying sizing material: the l Water Paper after the dehydration of step (4) gained is carried out to two-sided applying glue processing; The present embodiment adopts the l Water Paper of step (4) is passed through to the method applying glue of steeping vat, and makes sizing material spread upon uniformly filter paper surface by controlling l Water Paper speed.
(6) dry processing: the l Water Paper after baking step (5) glue spraying, in order fully to improve the utilization rate of heat, in the present embodiment, drying room length used is 32-36 rice, divides three sections and is dried, and first paragraph baking temperature is 250 ℃, this stage is because l Water Paper has just entered drying room, humidity is too high, does not carry out integral body circulation, is only limited to the inner loop of first paragraph, constantly supplement new thermal source simultaneously, get rid of 40～60% moisture; The temperature of second segment is 280 ℃, and the temperature of the 3rd section is 260 ℃, and second stage and phase III all adopt complete alternation, and supplements new thermal source at any time.After above-mentioned three stages, be also provided with drying cylinder, so that filter paper color is bleached.In the present embodiment, drying room adopts direct-fired method, the filter paper of drying room inside is carried out to tow sides dry simultaneously, and filter paper only needs 3～5 minutes from entering drying room to going out drying room drying, and the humidity of filter paper drops to 0.1% from 99.9%.
Comparative example 1:
The difference of the present embodiment and documents 1 is, what when the present embodiment Raw is prepared, choose is 5 parts of chopped silks of alkali-free glass fibres and 95 parts of medium-alkali glass fibre cottons that diameter is 0.3um; Other processing steps are identical with technological parameter.
Comparative example 2:
The difference of the present embodiment and documents 1 is, what when the present embodiment Raw is prepared, choose is 5 parts of chopped silks of alkali-free glass fibres and 95 parts of high alkali glass fibre cottons that diameter is 0.3um; Other processing steps are identical with technological parameter.
Performance test:
Get the glass fibre air filter paper that embodiment 1, comparative example 1 and comparative example 2 make and carry out air filtration performance test, result is as shown in table 1:
Table 1 different glass fiber air filter paper performance comparison
| Embodiment | Specific area m 2/g | Intensity N/m | Moisture percentage % | Adsorbance ml/g |
| Embodiment 1 | 3.08 | 1266 | 0.1 | 1.09 |
| Embodiment 2 | 1.21 | 1065 | 0.2 | 0.42 |
| Embodiment 3 | 1.03 | 1000 | 0.25 | 0.36 |
Data by table 1 can be found out: the specific area of the chopped silk of embodiment 1 alkali-free and the cotton air filter paper of alkali-free glass and 2-3 times that adsorbance is about embodiment 2,3, and also its intensity is high, and moisture percentage is low.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can to it, make various changes in the form and details, and not depart from the claims in the present invention book limited range.
Claims (8)
1. a high dust containing capacity glass fibre air filter paper, is characterized in that: alkali-free glass fibre cotton and bonding sizing material that described high dust containing capacity glass fibre air filter paper is 0.3-0.4um by the chopped silk of alkali-free glass fibre and diameter are made.
2. high dust containing capacity glass fibre air filter paper according to claim 1, is characterized in that: in described high dust containing capacity glass fibre air filter paper, the parts by mass of the chopped silk of alkali-free glass fibre is 3-8 part, and the parts by mass of alkali-free glass fibre cotton is 92-97 part.
3. according to high dust containing capacity glass fibre air filter paper described in claim 1 or 2, it is characterized in that: the hydrophober that described bonding sizing material is fluorine-containing carbon.
4. a production technique for high dust containing capacity glass fibre air filter paper as claimed in claim 1, is characterized in that, comprises the following steps:
(1) raw material is prepared: get respectively the chopped silk of 3-8 part alkali-free glass fibre and 92-97 part alkali-free glass fibre cotton;
(2) disperse slurrying: add making beating in disperser to disperse to obtain slurry the selected raw material of step (1), regulating the pH value of slurry is 2.9-3.2, and to regulate stock quality concentration be 1%～1.5%;
(3) wet moulding: pass on step (2) gained slurry to storage pool, to be diluted to mass concentration be 0.1%～0.15% and regulate PH to 2.8～3, then the slurry of storage pool is delivered to moulding on former and obtains l Water Paper;
(4) suction dehydration: step (3) gained l Water Paper is carried out to processed, make moisture percentage be less than 40%;
(5) spraying sizing material: the l Water Paper after the dehydration of step (4) gained is carried out to two-sided applying glue processing;
(6) dry processing: the l Water Paper after dry treatment step (5) glue spraying.
5. the technique of producing according to claim 4 high dust containing capacity glass fibre air filter paper, is characterized in that: when described step (2) is disperseed slurrying, beating degree is 52-56 ° of SR.
6. produce according to claim 4 the technique of high dust containing capacity glass fibre air filter paper, it is characterized in that, the chopped silk of described alkali-free glass fibre is adopted with the following method and is made: first e-glass marble is heated to 1600～1800 ℃ of meltings, then the melting e-glass marble of jetting obtains glass fibre, finally cuts gained glass fibre and obtains the chopped silk that length is consistent.
7. produce according to claim 4 the technique of high dust containing capacity glass fibre air filter paper, it is characterized in that: described step (4) suction dehydration is carried out in three stages, the vacuum of first stage is 0.02MPa, the vacuum of second stage is 0.03MPa, and the vacuum of phase III is 0.07Mpa.
8. according to the technique of producing high dust containing capacity glass fibre air filter paper described in claim 4-7 any one, it is characterized in that: the dry processing of described step (6) is carried out in four stages, temperature when first paragraph is dry is 250 ℃, temperature when second segment is dry is 280 ℃, the 3rd section of temperature when dry is 260 ℃, and the 4th section adopts cylinder dried to make the final moisture content of product lower than 0.1%.
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