CN109930425A - A kind of method of heated-air drying production hydraulic filtering glass filter paper - Google Patents
A kind of method of heated-air drying production hydraulic filtering glass filter paper Download PDFInfo
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- CN109930425A CN109930425A CN201910156223.XA CN201910156223A CN109930425A CN 109930425 A CN109930425 A CN 109930425A CN 201910156223 A CN201910156223 A CN 201910156223A CN 109930425 A CN109930425 A CN 109930425A
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Abstract
The invention discloses a kind of methods of heated-air drying production hydraulic filtering glass filter paper, the following steps are included: will be sent into hot air drier by after glass body paper impregnating resin made from existing wet process forming method, it is moved ahead with the paper feeding speed of 25-40m/min, successively the glass body paper two sides after impregnating resin is dried simultaneously using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C -150 DEG C stage heating hot winds simultaneously, until moisture content is lower than 5%；The production of hydraulic filtering glass filter paper is carried out using two-sided hot-air drying technology of the invention, the mechanical property and strainability of filter paper are significantly improved, the contradictory problems that can solve insurmountable filtering material filter efficiency and resistance that traditional handicraft perplexs always, enable the strainability of filtering material to give full play to.
Description
Technical field
The present invention relates to a kind of filtering and isolation technics, and in particular to a kind of to produce hydraulic filtering glass with Hot Air Drying
The method of fine filter paper.
Background technique
Conventional hydraulic filtering material process route are as follows: glass body paper is made by wet forming, then impregnating resin, used
Moisture removal is dried in dryer surface heating method.But the material after impregnating resin enters dryer surface and process is dried
In, when page surface touches the dryer surface of heating, page surface first receives heat and carries out heat temperature raising, the water in page
Point in the z-direction (thickness direction that the direction z in text is all paper) movement, resin are carried to page due to capillary force by water
Surface layer, under high rate of drying, the evaporation rate of surface moisture is fast, by capillary force action, moves to the resin of page surface
Also have little time internally to spread just to have solidified, thus cause page surface layer resin concentration higher, causes porosity to decline, shadow
Product strainability is rung, resistance is caused to be promoted, and the interfacial bonding strength decline of page.
Therefore, for such issues that, it would be desirable to caused by one kind can solve because of conventional drying processes under page porosity
It drops, resistance rises, the method for the production hydraulic filtering glass filter paper of page interfacial bonding strength decline problem.
Summary of the invention
The purpose of the present invention is to provide a kind of themes, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of method of heated-air drying production hydraulic filtering glass filter paper, comprising the following steps: will be by existing wet forming
It is sent into hot air drier, is moved ahead with the paper feeding speed of 25-40m/min, simultaneously after glass body paper impregnating resin made from method
Successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C -150 DEG C stage heating hot winds to the glass body paper after impregnating resin
Two sides is dried simultaneously, until moisture content is lower than 5%.
Further scheme: it is set the following steps are included: will be impregnated by glass body paper made from existing wet process forming method
It is sent into hot air drier after rouge, is moved ahead with the paper feeding speed of 25m/min, while successively using 55 DEG C -90 DEG C, 90 DEG C -120
DEG C, 120 DEG C -150 DEG C stage heating hot winds the glass body paper two sides after impregnating resin is dried simultaneously, until moisture content is low
In 5%.
Further scheme: it is set the following steps are included: will be impregnated by glass body paper made from existing wet process forming method
It is sent into hot air drier after rouge, is moved ahead with the paper feeding speed of 40m/min, while successively using 55 DEG C -90 DEG C, 90 DEG C -120
DEG C, 120 DEG C -150 DEG C stage heating hot winds the glass body paper two sides after impregnating resin is dried simultaneously, until moisture content is low
In 5%.
Further scheme: the resin is by weight by 14-16 parts of acrylic resin, 1 part of curing agent PF7302B
And 220 parts of water compositions.
Compared with prior art, the beneficial effects of the present invention are: carrying out liquid using two-sided hot-air drying technology of the invention
The production of press filtration glass filter paper significantly improves the mechanical property and strainability of filter paper, can solve traditional handicraft
The contradictory problems of insurmountable the filtering material filter efficiency and resistance that perplex always, enable the strainability of filtering material
It gives full play to.
Detailed description of the invention
Fig. 1 is the surface photomicrograph using the hydraulic filtering glass filter paper of traditional dryer surface heat drying technique production
(200×)。
Fig. 2 is the micro- photograph in cross section using the hydraulic filtering glass filter paper of traditional dryer surface heat drying technique production
Piece (500 ×).
Fig. 3 is surface photomicrograph of the present invention using the hydraulic filtering glass filter paper of two-sided hot-air drying technology production
(200×)。
Fig. 4 is cross section microphoto of the present invention using the hydraulic filtering glass filter paper of two-sided hot-air drying technology production
(300×)。
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
In the embodiment of the present invention, a kind of method of heated-air drying production hydraulic filtering glass filter paper, changing method includes: that will show
It is sent into hot air drier after having glass body paper impregnating resin obtained by conventional wet process forming method, in hot air drier
It is moved ahead with the paper feeding speed of 25m/min, while successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C of -150 DEG C of stage liters
The glass body paper two sides after impregnating resin is dried in warm wind simultaneously, until moisture content is lower than 5% to get glass filter paper,
In, resin is made of 15 parts of acrylic resin, 1 part of curing agent PF7302B and 220 parts of water by weight.
Embodiment 2
In the embodiment of the present invention, a kind of method of heated-air drying production hydraulic filtering glass filter paper, changing method includes: that will show
It is sent into hot air drier after having glass body paper impregnating resin obtained by conventional wet process forming method, in hot air drier
It is moved ahead with the paper feeding speed of 34m/min, while successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C of -150 DEG C of stage liters
The glass body paper two sides after impregnating resin is dried in warm wind simultaneously, until moisture content is lower than 5% to get glass filter paper,
In, resin is made of 15 parts of acrylic resin, 1 part of curing agent PF7302B and 220 parts of water by weight.
Embodiment 3
In the embodiment of the present invention, a kind of method of heated-air drying production hydraulic filtering glass filter paper, changing method includes: that will show
It is sent into hot air drier after having glass body paper impregnating resin obtained by conventional wet process forming method, in hot air drier
It is moved ahead with the paper feeding speed of 40m/min, while successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C of -150 DEG C of stage liters
The glass body paper two sides after impregnating resin is dried in warm wind simultaneously, until moisture content is lower than 5% to get glass filter paper.Its
In, resin is made of 15 parts of acrylic resin, 1 part of curing agent PF7302B and 220 parts of water by weight.
The working principle of embodiment 1-3: resin since the evaporation of moisture causes its concentration difference on the direction page z,
To form resin to the power spread inside page, thus resin is to the migration of both direction (surface migration and internal diffusion)
It carries out simultaneously, the degree that final resin is migrated to page surface depends on the result fought between two kinds of movements.In surface height
Under rate of drying, the evaporation rate of surface moisture is fast, by capillary force action, move to page surface resin also have little time to
Inside diffusion has just solidified, thus causes page surface layer resin concentration higher, the interfacial bonding strength decline of page；Phase
Instead, under evenly drying rate inside page, the evaporation rate of page internal moisture is moderate, and resin is to the diffusing capacity inside page
Increase, makes its degree raising that is evenly distributed in page, and then the interfacial bonding strength of page is also improved, strainability
It is obviously improved.
Compared with by the glass body paper performance parameter obtained by the conventional wet process forming method of embodiment 1, in conjunction under
Table 1:
Glass body paper performance parameter contrast table obtained by 1 product of the present invention parameter of table and conventional wet process forming method
| Technical indicator | Finished product after this method heated-air drying | Hydraulic filtering glass base paper sheet |
| Quantitative (g/m2) | 80 | 75 |
| Air permeability (cfm) | 29 | 30 |
| Stiffness (mN.m) | 9.5 | 6.2 |
| Bursting strength (kpa) | 90 | 35 |
| Filtration resistance (mm/H2O) | 9.5 | 9.3 |
| Filter efficiency (0.3um, %) | 85 | 80 |
| Maximum diameter of hole (um) | 28 | 29 |
1. the main characterization method and test method of product:
(1) it the characterization of emulsion resin extent of migration in filter paper: is characterized indirectly using page internal bond strength.If
Emulsion resin extent of migration is high, then page entirety bond strength is low.Conversely, then the whole bond strength of page is high, by resistance to broken
It spends with stiffness and embodies.
(2) distribution of the emulsion resin in filter paper uses scanning electron microscopic observation filter paper cross section, can be visually observed that tree
The case where combining between rouge and fiber is embodied by resistance and filter efficiency.Determining instrument is LE0 1530VP type field hair
Penetrate scanning electron microscope (German IE0 company manufacture).
(3) it the characterization of the decline of page porosity and resistance rising degree: is characterized using air permeability.
2. the present invention is using two-sided hot wind heat drying product compared with traditional dryer surface heat drying product
(1) influence of the drying process to glass filter paper fibre bond strength: in conjunction with referring to the following table 2, experimental result is found, such as
Using being dried under two-sided hot wind heating method after fruit impregnated paper, then page inter-layer bonding force is preferable, and paper strength is higher.
During filter paper is dry, according to capillarity mechanism, the gap in page between fiber forms capillary channel, by hair
The effect of tubule power, resin are carry by water and are moved in these channels, to generate migration.Resin is due to capillarity
Power is carried by water to page surface layer, and resin is since the evaporation of moisture causes its concentration difference on the direction page z, thus shape
At resin to the power spread inside page, thus migration of the resin to both direction carries out simultaneously.Final resin is to paper
The degree of page frame table migration depends on the result fought between two kinds of movements.Under the high rate of drying in surface, the evaporation of surface moisture
Speed is fast, and by capillary force action, the resin for moving to page surface also has little time internally to spread just to have solidified, thus
Cause page surface layer resin concentration higher, the interfacial bonding strength decline of page；On the contrary, under page evenly drying rate, table
The evaporation rate of face moisture is moderate, and resin increases to the diffusing capacity inside page, proposes its degree of being evenly distributed in page
Height, and then the interfacial bonding strength of page is also improved.
2 this method of table is compared with conventional method is to glass filter paper fibre bond strength
| Technical parameter | Quantitative (g/ ㎡) | Bursting strength (k pa) | Stiffness (mN.m) |
| Dryer surface heat drying technique | 80 | 50 | 6.5 |
| Two-sided hot wind heat drying technique | 80 | 90 | 9.5 |
(2) emulsion resin intuitively distribution microstructure of the emulsion resin in glass filter paper: is observed using scanning electron microscope
Distribution situation in surface and cross section.
In conjunction with referring to Fig. 1 and Fig. 2, for the hydraulic filtering glass filter paper of dryer surface heat drying technique production surface and
Cross section microphoto.As seen from the figure, resin distributed pole in page is uneven, sticks close to fiber surface at surface
Resin is more, and the resin sticked on page interlayer fiber surface is less, and illustrating filter paper, emulsion resin is big in the drying process
Partially to page surface thermophoresis.It is loose that this directly results in the pilotaxitic texture formed between fiber, generates biggish hole.Due to
In the drying process, resin is rapidly migrated to page surface film forming, makes to form discrete face company between the fiber of surface
It connects, this will close the part hole of page surface, to influence filtering and permeability.
In conjunction with referring to Fig. 3 and Fig. 4, the hydraulic filtering glass filter paper of two-sided hot-air drying technology production is used for this method
Surface and cross section microphoto.As seen from the figure, resin is relatively uniform along the cross-section EDS maps of page, illustrates in filter paper drying process
The thermophoresis degree of middle emulsion resin to surface is smaller, and the fluoropolymer resin for being stranded in page interlayer is attached to fiber table
Face makes to form preferable pilotaxitic texture between fiber, this is extremely advantageous to raising page interfacial bonding strength and mechanical property.Filter
The amount of resin of paper surface enrichment is less with respect to the former, and latex particle is comparatively fast demulsified in the drying process, and attaches to fiber surface,
More continuous latex film can not be formed between page hole, to reduce under the page porosity caused by emulsion film forming
The trend of drop, this is conducive to keep the preferable strainability of filter paper.
(3) influence of the two-sided hot-air drying technology to filter paper strainability: in conjunction with referring to the following table 3, from table air permeability,
Resistance, filter efficiency test result from the point of view of, the two-sided hot wind heat drying technique of this method, page air permeability is big, and resistance is low,
Filter efficiency is higher.Therefore, the hydraulic filtering glass performance of filter paper produced by this technique is significantly improved.Breach biography
The contradiction of technique of uniting insurmountable filtering material efficiency and resistance always.
The influence of 3 this method of table and traditional dryer surface heat drying technique to filter paper strainability
Conclusion: the production of hydraulic filtering glass filter paper is carried out using two-sided hot-air drying technology of the invention, to filter paper
Mechanical property and strainability are significantly improved, and can solve the insurmountable filtering material mistake that traditional handicraft perplexs always
The contradictory problems for filtering efficiency and resistance, enable the strainability of filtering material to give full play to
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
1. a kind of method of heated-air drying production hydraulic filtering glass filter paper, including, which comprises the following steps: it will
It is sent into hot air drier by after glass body paper impregnating resin made from existing wet process forming method, with the paper feeding of 25-40m/min
Speed moves ahead, while successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C -150 DEG C stage heating hot winds to impregnating resin
Glass body paper two sides afterwards is dried simultaneously, until moisture content is lower than 5%.
2. the method for heated-air drying according to claim 1 production hydraulic filtering glass filter paper, which is characterized in that including with
Lower step: it will be sent into hot air drier by after glass body paper impregnating resin made from existing wet process forming method, with 25m/min
Paper feeding speed move ahead, while successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C -150 DEG C stage heating hot winds are to leaching
Glass body paper two sides after stain resin is dried simultaneously, until moisture content is lower than 5%.
3. the method for heated-air drying according to claim 1 production hydraulic filtering glass filter paper, which is characterized in that including with
Lower step: it will be sent into hot air drier by after glass body paper impregnating resin made from existing wet process forming method, with 40m/min
Paper feeding speed move ahead, while successively using 55 DEG C -90 DEG C, 90 DEG C -120 DEG C, 120 DEG C -150 DEG C stage heating hot winds are to leaching
Glass body paper two sides after stain resin is dried simultaneously, until moisture content is lower than 5%.
4. the method for heated-air drying production hydraulic filtering glass filter paper according to claim 1 to 3, which is characterized in that
The resin is made of 14-16 parts of acrylic resin, PF7302B1 parts of curing agent and 220 parts of water by weight.
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| CN201910156223.XA CN109930425A (en) | 2019-03-01 | 2019-03-01 | A kind of method of heated-air drying production hydraulic filtering glass filter paper |
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| CN201910156223.XA CN109930425A (en) | 2019-03-01 | 2019-03-01 | A kind of method of heated-air drying production hydraulic filtering glass filter paper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952369A (en) * | 2019-12-23 | 2020-04-03 | 石家庄辰泰滤纸有限公司 | Production process of high-dust-holding-capacity filter paper |
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- 2019-03-01 CN CN201910156223.XA patent/CN109930425A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952369A (en) * | 2019-12-23 | 2020-04-03 | 石家庄辰泰滤纸有限公司 | Production process of high-dust-holding-capacity filter paper |
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Application publication date: 20190625 |