CN107178003B - A kind of rapid curing dip-coating glue, using oil filter paper of the dip-coating glue and preparation method thereof - Google Patents
A kind of rapid curing dip-coating glue, using oil filter paper of the dip-coating glue and preparation method thereof Download PDFInfo
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- CN107178003B CN107178003B CN201710394109.1A CN201710394109A CN107178003B CN 107178003 B CN107178003 B CN 107178003B CN 201710394109 A CN201710394109 A CN 201710394109A CN 107178003 B CN107178003 B CN 107178003B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/48—Condensation polymers of aldehydes or ketones with phenols
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/24—Polyesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The present invention relates to a kind of rapid curing dip-coating glue, using oil filter paper of the dip-coating glue and preparation method thereof, the low-temperature fast-curing oil filter paper uses, the dipping solidification of dip-coating glue dilution obtains, dip-coating glue, raw material components and its weight percent composition are as follows: thermosetting resin 60-75%, thermoplastic resin 20-35%, promotor 0.5-2%, curing agent 1-5%, the promotor are hexamethylenetetramine, and promotor is dicyandiamide.Using dip-coating glue dip-coating body paper of the invention, under identical oven temperature conditions, speed 10% can be improved using phenolic resin than existing, can be improved yield, additional income.The product of acquisition also has good flexibility under the premise of guaranteeing filter paper, is easy to the discounting processing of subsequent workshop section.
Description
Technical field
The invention belongs to filter paper technical fields, and in particular to a kind of rapid curing dip-coating glue, using the dip-coating glue
Oil filter paper and preparation method thereof.
Background technique
Machine oil filter material for combustion engine industrial filter generally constitutes body paper by cellulose fibre, synthetic fibers, and body paper is through setting
It is made after rouge dipping solidification, the main feature with higher bursting strength and the easy processings such as stiffness and flexibility.
Phenolic resin has heat curing type and two kinds of thermoplasticity.Thermosetting resin is from impregnation filter paper is started up to filter core passes through
The reaction process that assembly filter core is made in hot setting is divided into three phases.Its mechanism of action: first stage phenolic resin starts to soak
When stain handles filter paper, because the resin molecular weight is low and strand is shorter, apparent reinforcing effect not formed to filter paper, through too low
After temperature is dry, strand, which is constantly crosslinked to combine, becomes second stage phenolic resin when forming macromolecular chain；Phenolic aldehyde containing second stage
The filter paper of resin has had certain intensity, can keep intensity by the processing such as embossing, then pass through 180 DEG C of high temperature phenol
Urea formaldehyde enters phase III further crosslinking curing and forms space network, so that filter paper is obtained enough intensity and reaches dipping
The purpose of processing.But the curing degree of phenolic resin, which is extremely difficult to 100%, to be fully cured, and required energy is higher, high temperature
Curing time is longer.
Existing to be solidified using phenolic resin, there are following inevitable in conventional machine oil filter material production technology
Defect: filter paper brittleness is larger when curing degree is high, is easily broken during giving a discount, and lacks flexibility；Curing rate is slower, required
Solidification temperature is higher, and energy consumption is high；Brown is presented in color deeply after solidification, unsightly；Production cost is higher.
Therefore, a kind of new curing system is developed, the drawbacks of being brought with improvement using single thermoset phenolic resin, is reached
Low-temperature fast-curing effect is always current an open question always.
Summary of the invention
In view of the deficiencies of the prior art, a kind of rapid curing dip-coating glue of the present invention, using the oil strainer of the dip-coating glue
Paper and preparation method thereof, the filter paper have low-temperature fast-curing characteristic, and curing time is short, curing time 5-6min, have height
Stiffness, high bursting strength and excellent processing performance, beautiful appearance.
Technical scheme is as follows:
A kind of rapid curing dip-coating glue, raw material components and its weight percent composition are as follows:
Thermosetting resin 60-75%, thermoplastic resin 20-35%, promotor 0.5-2%, curing agent 1-5%,
The promotor is hexamethylenetetramine, and promotor is dicyandiamide.
Preferred according to the present invention, described rapid curing dip-coating glue, raw material components and its weight percent composition
It is as follows:
Thermosetting resin 65-70%, thermoplastic resin 25-30%, promotor 0.5-1%, curing agent 3-5%.
Highly preferred, described rapid curing dip-coating glue, raw material components and its weight percent composition are as follows:
Thermosetting resin 68%, thermoplastic resin 28%, promotor 1%, curing agent 3%.
According to the present invention, a kind of low-temperature fast-curing oil filter paper is solidified using above-mentioned dip-coating glue dilution dipping
It arrives, impregnation increment 20-26%, the dip-coating glue dilution is that hybrid resin addition methanol dilution to mass concentration is 25-
28% dilution.
According to the present invention, a kind of preparation method of low-temperature fast-curing oil filter paper, comprises the following steps that
(1) prepared by body paper: weighing and is impregnated by the composite fibre that needle pulp fibres, broad-leaved pulp fibres, PET fiber form
40-50min size degradation is diluted with water after size degradation and is discongested, and discongests rear defibrination mixing, wet strength agent is added online, by inclined wire paper
Machine is manufactured paper with pulp, and the body paper with porous loose structure is made；
(2) prepared by dip-coating glue dilution: taking curing agent, promotor not to be dissolved with methanol according to the ratio, it is molten to obtain curing agent
Liquid, accelerator solution take thermoset phenolic resin, thermal plastic phenolic resin to be added in methanol according to the ratio, are stirred at room temperature 3-5 points
Clock is added curing agent solution and stirs 5-8 minutes, is eventually adding accelerator solution and stirs 10-15 minutes, obtains the dilution of dip-coating glue
Liquid；
(3) coat: by the dip-coating glue dilution of step (2) by the way of double roller metered film transfer dip-coating to step
(1) on body paper made from, oil filter paper is obtained after dry solidification.
Preferred according to the present invention, in step (1), in composite fibre, by weight, needle pulp fibres account for 50%, are wealthy
Leaf pulp fibres account for 30%, PET fiber and account for 20%.
Preferred according to the present invention, the wet strength agent is polyamide Hydrin resin, and the quality of wet strength agent is dense
Degree is 1-4%, and the flow that wet strength agent is added online is 3-6L/h, and the additional amount of wet strength agent accounts for the 1-3 ‰ of composite fibre dry weight.
Preferred according to the present invention, in step (2), the mass concentration of dip-coating glue is 25- in dip-coating glue dilution
28%.
Preferred according to the present invention, in step (3), coating speed is 40-60m/min.
It is preferred according to the present invention, in step (3), gluing gap: 598 μm of fore side, 621 μm of transmission side.
Preferred according to the present invention, in step (3), the dry solidification is that the body paper after dip-coating successively connects by 8 groups
The cylinder group connect is dried, and 70 DEG C of 1# dryer temperature, 80 DEG C of 2# dryer temperature, 90 DEG C of 3# drying cylinder temperature, 4# dryer temperature 120
DEG C, 120 DEG C of 5# dryer temperature, 150 DEG C of 6# dryer temperature, 150 DEG C of 7# dryer temperature, 120 DEG C of 8# dryer temperature, every group it is dry when
Between be 48s.
The index for the body paper that step (1) of the present invention obtains is as follows: quantitative: 155g/m2, thickness: 850 μm, air permeability:
380L/m2* S, maximum diameter of hole: 70 μm, average pore size: 65 μm.
The oil filter paper finished product filter paper that the present invention obtains, index are as follows: quantitative: 208g/m2, thickness: 900 μm, volatile matter
Matter: 4%, stiffness: 13mN*m, bursting strength: 250KPa, air permeability: 380L/m2* S, maximum diameter of hole: 70 μm, average pore size: 65 μ
m。
The heated formaldehyde and unreacted ortho para decomposited of promotor hexamethylenetetramine in dip-coating glue of the invention
Active site reaction, while dehydration forms methine key bridge, curing agent dicyandiamide is diamines substance, and both ends pass through the hydroxyl with phenolic aldehyde
Base carries out dehydration, forms cross-linked structure, produces so that the further polycondensation of resin be made to obtain insoluble three-dimensional-structure solidification
Object.The present invention provides group required for phenolic resin curing by curing agent and promotor, enables phenolic resin in low temperature
Rapid curing under state is able to maintain certain flexibility and is easy to add after solidifying due to the effect filter paper of thermal plastic phenolic resin
Work, to keep color after further solidification vivid, intensity is stiff.
Beneficial effects of the present invention are as follows:
1, using dip-coating glue dip-coating body paper of the invention, under identical oven temperature conditions, phenolic aldehyde is used than existing
Speed 10% can be improved in resin, can be improved yield, additional income.
2, using dip-coating glue dip-coating body paper of the invention, the product of acquisition also has good under the premise of guaranteeing filter paper
Flexibility, be easy to subsequent workshop section discounting processing.
3, dip-coating glue of the invention due to curing rate it is very fast, when being made into filter core volatile substance it is less be conducive to environmental protection,
Such product can be applied to the processing of environment-friendly filter element.
Specific embodiment
Below by specific embodiment, the present invention will be further described, but not limited to this.
In embodiment, embodiment 1:
Dip-coating glue:
The low-temperature fast-curing dip-coating glue of oil filter paper, raw material components and its weight percent composition are as follows:
Thermosetting resin 68%, thermoplastic resin 28%, dicyandiamide 1%, hexamethylenetetramine 3%.
A kind of preparation method of low-temperature fast-curing oil filter paper, comprises the following steps that
(1) prepared by body paper: weighing and is impregnated by the composite fibre that needle pulp fibres, broad-leaved pulp fibres, PET fiber form
45min size degradation, in composite fibre, by weight, needle pulp fibres account for 50%, broad-leaved pulp fibres and account for 30%, PET fiber and account for
20%.It is imported after fluffer is discongested after the completion of size degradation and discongests stock tank, using cone after discongesting stock tank and plain boiled water dilution is added
It is imported after shape paste mill grinding and destroies forebay, the fiber mixed reaches header box by fan pump, will be diluted to 2% in header box
The wet strength agent of concentration is added in wood pulp cellulose online with the flow that metering pump is adjusted to 5L/h, is manufactured paper with pulp and is provided by oblique net paper machine
The body paper for thering is porosity and looseness to construct；
(2) prepared by dip-coating glue dilution: taking curing agent, promotor not to be dissolved with methanol according to the ratio, it is molten to obtain curing agent
Liquid, accelerator solution take thermoset phenolic resin, thermal plastic phenolic resin to be added in methanol according to the ratio, are stirred at room temperature 3-5 points
Clock is added curing agent solution and stirs 5-8 minutes, is eventually adding accelerator solution and stirs 10-15 minutes, obtains the dilution of dip-coating glue
Liquid；The mass concentration of dip-coating glue is 28% in dip-coating glue dilution.
(3) coat: by the dip-coating glue dilution of step (2) by the way of double roller metered film transfer dip-coating to step
(1) on body paper made from, oil filter paper is obtained after dry, coating speed is 40-60m/min.Gluing gap: 598 μm of fore side
621 μm of transmission side.It is specific dry are as follows: 1#70 DEG C 2#80 DEG C 3#90 DEG C 4#120 DEG C 5#120 DEG C 6#150 DEG C of 7#150 in step (3)
DEG C of 8#120 DEG C every section of drying time is 48s.
Embodiment 2:
With dip-coating glue described in embodiment 1, the difference is that, raw material components and its weight percent composition are as follows:
Thermosetting resin 70%, thermoplastic resin 25%, dicyandiamide 3%, hexamethylenetetramine 2%.
Embodiment 3:
With dip-coating glue described in embodiment 1, the difference is that, raw material components and its weight percent composition are as follows:
Thermosetting resin 65%, thermoplastic resin 30%, dicyandiamide 1%, hexamethylenetetramine 4.
Experimental example:
It is spare in normal temperature state naturally dry by dip-coating glue dip-coating body paper of the invention.Pattern obtained is in 180 DEG C of items
Solidifying the different time under part, room temperature balances after 1h air permeability, curing degree, stiffness, bursting strength after the impregnation of re-test pattern, and
It is compared as a control group with existing using thermosetting phenolic resin coating body paper, the present invention and control group solidify different time
Test result afterwards see the table below shown in 1.
Body paper is all made of the same kind body paper of oblique net paper machine production as substrate, is all made of same dip coating manner and carries out.
Air permeability, curing degree, stiffness, bursting strength after the impregnation of the different curing times of table 1
It can be seen that from upper 1 data of table and the coating process of promotor and curing agent curing rate under the same conditions be added
Fastly, pattern intensity is high.
The baking oven that the pattern that two kinds solidify 4min is placed again into 180 DEG C under the state of cooling is heated into 1min, takes out pattern
Pattern is done bending immediately to find to keep bending state using the pattern that gluing solution of the invention obtains after cooling, and is used
The pattern that thermosetting phenolic resin coating obtains rebounds back straightened condition again.It is certain that gluing solution of the invention can be such that pattern has
Processing toughness.
Claims (3)
1. a kind of low-temperature fast-curing oil filter paper is obtained, impregnation increment 20- using the dilution dipping solidification of dip-coating glue
26%；
Dip-coating glue, raw material components and its weight percent composition are as follows:
Thermosetting phenolic resin 65-70%, thermoplastic phenolic resin 25-30%, promotor 0.5-1%, curing agent 3-5%,
The promotor is hexamethylenetetramine, and curing agent is dicyandiamide,
The preparation method of low-temperature fast-curing oil filter paper, comprises the following steps that
(1) prepared by body paper: weighing and carries out immersion 40- by the composite fibre that needle pulp fibres, broad-leaved pulp fibres, PET fiber form
50min size degradation, in composite fibre, by weight, needle pulp fibres account for 50%, broad-leaved pulp fibres and account for 30%, PET fiber and account for
20%, it is diluted with water after size degradation and is discongested, discongest rear defibrination mixing, wet strength agent is added online, manufactures paper with pulp by oblique net paper machine, makes
There must be the body paper of porous loose structure；The wet strength agent is polyamide Hydrin resin, and the quality of wet strength agent is dense
Degree is 1-4%, and the flow that wet strength agent is added online is 3- 6L/h, and the additional amount of wet strength agent accounts for the 1-3 ‰ of composite fibre weight；
(2) dip-coating glue dilution prepare: take curing agent, promotor to be dissolved respectively with methanol according to the ratio, obtain curing agent solution,
Accelerator solution takes thermosetting phenolic resin, thermoplastic phenolic resin to be added in methanol according to the ratio, is stirred at room temperature 3-5 minutes,
Curing agent solution is added to stir 5-8 minutes, is eventually adding accelerator solution and stirs 10-15 minutes, obtain dip-coating glue dilution,
The mass concentration of dip-coating glue is 25-28% in dip-coating glue dilution；
(3) coat: by the dip-coating glue dilution of step (2) using double roller metered film transfer by the way of dip-coating to step (1) system
On the body paper obtained, coating speed is 40-60m/min, obtains oil filter paper after dry solidification.
2. low-temperature fast-curing oil filter paper according to claim 1, which is characterized in that raw material components and its weight percent
It is as follows than forming:
Thermosetting phenolic resin 68%, thermoplastic phenolic resin 28%, promotor 1%, curing agent 3%.
3. low-temperature fast-curing oil filter paper according to claim 1, which is characterized in that in step (3), gluing gap:
598 μm of fore side, 621 μm of transmission side, the dry solidification be body paper after dip-coating by 8 groups of sequentially connected cylinder groups into
Row drying, 70 DEG C of 1# dryer temperature, 80 DEG C of 2# dryer temperature, 90 DEG C of 3# drying cylinder temperature, 120 DEG C of 4# dryer temperature, 5# dryer temperature
120 DEG C, 150 DEG C of 6# dryer temperature, 150 DEG C of 7# dryer temperature, 120 DEG C of 8# dryer temperature, every group of drying time is 48s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710394109.1A CN107178003B (en) | 2017-05-28 | 2017-05-28 | A kind of rapid curing dip-coating glue, using oil filter paper of the dip-coating glue and preparation method thereof |
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| CN201710394109.1A CN107178003B (en) | 2017-05-28 | 2017-05-28 | A kind of rapid curing dip-coating glue, using oil filter paper of the dip-coating glue and preparation method thereof |
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| CN107178003B true CN107178003B (en) | 2019-08-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108035194A (en) * | 2017-05-28 | 2018-05-15 | 山东龙德复合材料科技股份有限公司 | A kind of rapid curing automobile filter paper dip-coating glue, automobile filter paper and preparation method using the dip-coating glue |
| CN108004840A (en) * | 2017-12-27 | 2018-05-08 | 山东圣泉新材料股份有限公司 | A kind of quick-setting automobile filter paper |
| CN109653023A (en) * | 2018-12-04 | 2019-04-19 | 民丰特种纸股份有限公司 | It is a kind of for manufacturing the translucent suction pipe paper and preparation method of translucent suction pipe |
| CN114855500A (en) * | 2022-04-15 | 2022-08-05 | 山东仁丰特种材料股份有限公司 | Environment-friendly curing-free engine oil filtering material and preparation method thereof |
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| CN103603226A (en) * | 2013-11-07 | 2014-02-26 | 任慧 | Paper and thermosetting resin compound and preparation method thereof |
| CN105714597A (en) * | 2016-02-25 | 2016-06-29 | 杭州特种纸业有限公司 | Engine oil filter paper and preparation method thereof |
| CN105771423A (en) * | 2016-03-11 | 2016-07-20 | 陕西宝鸡嘉特滤材科技有限公司 | Low-temperature fast-curing filter material and preparation method thereof |
| CN106351070A (en) * | 2016-08-31 | 2017-01-25 | 量瑞流体科技(上海)有限公司 | Filtering material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004059841A (en) * | 2002-07-31 | 2004-02-26 | Dainippon Ink & Chem Inc | Resin composition for filter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603226A (en) * | 2013-11-07 | 2014-02-26 | 任慧 | Paper and thermosetting resin compound and preparation method thereof |
| CN105714597A (en) * | 2016-02-25 | 2016-06-29 | 杭州特种纸业有限公司 | Engine oil filter paper and preparation method thereof |
| CN105771423A (en) * | 2016-03-11 | 2016-07-20 | 陕西宝鸡嘉特滤材科技有限公司 | Low-temperature fast-curing filter material and preparation method thereof |
| CN106351070A (en) * | 2016-08-31 | 2017-01-25 | 量瑞流体科技(上海)有限公司 | Filtering material and preparation method thereof |
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