CN106390591A - Filtering sponge and preparation thereof, filtering device and laser projection equipment - Google Patents
Filtering sponge and preparation thereof, filtering device and laser projection equipment Download PDFInfo
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- CN106390591A CN106390591A CN201610851622.4A CN201610851622A CN106390591A CN 106390591 A CN106390591 A CN 106390591A CN 201610851622 A CN201610851622 A CN 201610851622A CN 106390591 A CN106390591 A CN 106390591A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1225—Fibre length
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses filtering sponge and preparation thereof, a filtering device and laser projection equipment. The filtering sponge comprises fiber, wherein the pore diameter of the sponge is 0.5 to 1.5 mm and the length of the fiber is 1 to 5 mm. During preparation of the filtering sponge, the fiber is cut off into fibers with length of 1 to 5 mm; the cut fibers are added into a mixture which is used in the preparation process of polyurethane sponge; the sponge is prepared by a preparation process of the polyurethane sponge; and during use, the sponge can serve as the filtering sponge and also can be positioned at an air inlet position of the laser projection equipment. The filtering sponge which is prepared by the technical scheme provided by the embodiment of the invention and has an electrostatic adsorption effect can be washed with water repeatedly, has high dust holding capacity and has a good filtering effect on tiny suspended particles.
Description
Technical field
The present invention relates to technical field of environmental science, filter sponge and its preparation, filter, laser particularly to a kind of
Projector equipment.
Background technology
For environmental science, the particle that particle diameter is less than 100 μm is referred to as total suspended matter particle, and they are air pollutions
One main source.Central diameter is equal to or less than 10 microns of suspended particles, is defined as respirable suspended particulate, is also called
PM10, they can enter the respiratory system harm human health of people.Diameter is less than or equal to 2.5 microns of particulate matter, is determined
Justice is lung particulate matter, and also known as PM2.5, they can be directly entered alveolar, maximum to harm.Due to suspended particles
Generally existing, needs the further purify air of filter.Mainly pass through airstrainer or filtration at present in filter
Sponge is filtering.
Airstrainer is with polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyamide
Etc. (PA) based on material, it is applied to filter small suspended particles, but airstrainer can form resistance to air, with filtration
The increase of net laying dust, screen pack resistance will be with increase.Because airstrainer is not capable of washing, when screen pack laying dust is too many, meeting
Cause ventilation hole plug, so that screen pack is reduced by air quantity further, or screen pack local is pierced, screen pack will be scrapped.
Filter sponge and be also referred to as mesh sponge, mostly polyurethane material, the elasticity of filtration sponge is good, pulling force is strong, filter dirt speed
Hurry up, gas-flow resistance is low, performance of ventilating good, chemical stability is good, and there is stronger mechanical strength, can repeatedly wash, washing
Effect does not deteriorate afterwards.In general, because filter sponge aperture excessive so that polyurethane material preparation sponge material filter effect
Less than airstrainer.
To sum up, the screen pack in current filter can be generally divided into two kinds：Fibrous filter net and filtration sponge.But this
The respective shortcoming of two class screen packs is respectively：The screen pack of electrostatic fibre Weaving method preparation is not washable, and dust containing capacity is low, fiber
Easily aging or pullled by external force and come off；Filter sponge ventilation aperture larger, poor filtration effect.
Content of the invention
The invention provides a kind of filter sponge and its preparation, filter, laser projection device, with so that filtering sea
Silk floss can be washed repeatedly, dust containing capacity high, has preferable filter effect to small suspended particles.
The present invention provides technical scheme below：
Embodiments provide a kind of filtration sponge, in described filtration sponge, include fiber, wherein：
Sponge aperture is 0.5-1.5mm；
Fibre length is 1-5mm.
It is preferred that described fiber is the fiber with electrostatic adsorption.
It is preferred that described fiber is the fiber that one of following material or a combination thereof are made：PP, PE, PET, flaxen fiber, cotton
Fiber.
It is preferred that when described fiber is PP, a diameter of 0.5-9 μm, sheet resistance is 2 × 1015Ω-2×1016Ω；
When described fiber is PE, a diameter of 5-10 μm, sheet resistance is 3 × 1016Ω-3×1017Ω；
When described fiber is PET, a diameter of 0.1-3 μm, sheet resistance is 2.5 × 1017Ω-2.5×1018Ω；
When described fiber is ramie, fineness is 30-40 μm, and length is 20-250mm；
When described fiber is flax, fineness is 12-17 μm, and length is 17-25mm；
When described fiber is jute, fineness is 15-18 μm, and length is 1.5-5mm；
When described fiber is bluish dogbane, fineness is 18-27 μm, and length is 2-6mm；
When described fiber is hemp, fineness is 15-17 μm, and length is 15-25mm；
When described fiber is bluish dogbane, fineness is 17-23 μm, and length is 20-25mm；
When described fiber is sisal hemp, fineness is 20-23 μm, and length is 2.7-4.4mm；
When described fiber is medium staple cotton, fineness is 15-20 μm, and length is 25-35mm；
When described fiber is long-staple cotton, fineness is 18-23 μm, and length is ＞ 33mm.
Embodiments provide a kind of preparation method of sponge as above, including：
Fibre cutting is become the fiber that length is 1-5mm；
The fiber of cut-out is added in the mixture used in polyurethane sponge preparation process；
By polyurethane sponge, preparation technology is prepared into sponge.
It is preferred that the PU foaming process adopting in polyurethane sponge preparation technology steeps method or method of molding for block.
It is preferred that when PU foaming process is for block bubble method, the mixture used in polyurethane sponge preparation process includes：
Water, dichloromethane, triethylenediamine, silicone oil, PPG.
It is preferred that water be 2.5-4 part, dichloromethane be 2-9 part, triethylenediamine be 0.4-0.6 part, silicone oil be 2-3
Part, PPG are 60-100 part.
It is preferred that described be prepared into sponge by polyurethane sponge preparation technology, including：
Mixture is mixed；
Add isocyanates stirring mixing；
Naturally cure.
It is preferred that mixture mixes carrying out at temperature is for 23-27 DEG C；
The isocyanates adding is 30-40 part, and mixing speed is 900-1000r/min, and mixing time is 10-15s；
Naturally the time of curing is 72h.
It is preferred that when PU foaming process is method of molding, the mixture used in polyurethane sponge preparation process includes：
Water, triethylenediamine, silicone oil, PPG.
It is preferred that water be 2.5-4 part, triethylenediamine be 0.4-0.6 part, silicone oil be that 2-3 part, PPG are
60-100 part.
It is preferred that described be prepared into sponge by polyurethane sponge preparation technology, including：
Mixture is mixed；
Add isocyanates stirring mixing；
Inject the mixture in autoclave and seal, do not heated up with after the inert gas purging of raw material reaction with a small amount of；
Injection inert gas, saturation under constant temperature and pressure；
Unload and be depressed into normal pressure.
It is preferred that mixture mixes carrying out at temperature is for 23-27 DEG C；
The isocyanates adding is 30-40 part, and mixing speed is 900-1000r/min, and mixing time is 10-15s；
Time with inert gas purging is 2-3min, is warmed up to 40-50 DEG C；
To 20MPa, under constant temperature and pressure, saturation time is 48h to injection inert gas.
It is preferred that described PPG be polyether triol, oxolane ether glycol, arbitrary in the equal PTMEG of THF-
Plant or several mixtures, molecular weight is 2800-3300, hydroxyl value is：54～57mgKOH/g.
It is preferred that described fiber is 5-10 part.
Embodiments provide a kind of using method of sponge, described sponge is sponge as above, described side
Method includes：
Described sponge is made filtration sponge by shape on demand；
Using described filtration sponge Chalk-dust filtering.
It is preferred that using described filtration sponge Chalk-dust filtering at laser projection device air intake vent.
Embodiments provide a kind of filter, include filtering sponge, wherein, described filtration in filter
Sponge is above-mentioned filtration sponge, or the filtration sponge that above-mentioned method prepares.
Embodiments provide a kind of laser projection device, including：Sponge as above, wherein：
Described sponge is located at laser projection device air intake vent.
The present invention has the beneficial effect that：
In technical scheme provided in an embodiment of the present invention, first fibre cutting is become the fiber that length is 1-5mm；Then will
After in mixture used in the fiber addition polyurethane sponge preparation process of cut-out, then pass through polyurethane sponge preparation technology
It is prepared into sponge.Add the chopped fiber with electrostatic adsorption during filtering sponge foaming, due to there being adding of chopped fiber
Enter so that the filtration sponge with electrostatic adsorption prepared can repeatedly wash, dust containing capacity high, small suspended particles are had relatively
Good filter effect.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the filter screen structure schematic diagram that in the embodiment of the present invention, sponge is made；
Fig. 2 is the preparation method implementation process diagram of sponge in the embodiment of the present invention；
Fig. 3 is the using method implementation process diagram of sponge in the embodiment of the present invention；
Fig. 4 is laser projection device screen pack application site schematic diagram in the embodiment of the present invention.
Specific embodiment
Inventors noted that due to the generally existing of suspended particles, needing the further purify air of filter.And it is current
Mainly filtered by airstrainer or filtration sponge in filter, enable to play the main of Chalk-dust filtering effect
It is diffusion effect, interception effect, the inertia effect, sieve effect and five kinds of filtration mechanisms synergies of electrostatic effect, wherein, electrostatic is imitated
The filter effect of PM2.5, PM10 should be obviously improved.
Inventor is also noted that the fibrous filter net and filtration sponge that in current filter, screen pack adopts, and has respectively
The screen pack of electrostatic fibre Weaving method preparation is not washable, and dust containing capacity is low, and fiber is easily aging or is pullled by external force and comes off；Cross
Filter sponge ventilation aperture is larger, the deficiency of poor filtration effect.
Based on this, in the embodiment of the present invention, provide a kind of preparation of filtration sponge with electrostatic adsorption, use
Scheme, the sponge of preparation can be washed repeatedly, and dust containing capacity is high, and small suspended particles (particularly PM2.5-PM10) are had preferably
Filter effect.
Specifically, when sponge is filtered in preparation, add in polyurethane filter sponge preparation process and there is Electrostatic Absorption work
Chopped fiber.Fiber used can be the fiber that PP, PE, PET etc. have electrostatic adsorption.
Preparation scheme makes to filter sponge aperture in 0.5-1.5mm, and staple length is in 1-5mm.
Filtration sponge in scheme is that have Electrostatic Absorption by addition during filtration sponge foaming mentioned above
The chopped fiber of effect, the filtration sponge with electrostatic adsorption prepared by this method can be washed repeatedly, dust containing capacity high,
There is preferable filter effect to small suspended particles (particularly PM2.5, PM10), the improvement main cause of this effect is short fibre
The addition of dimension.Apply and then can play dustproof effect at laser projection device air intake vent.
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is illustrated.
In declarative procedure, the enforcement to sponge first is illustrated, then the preparation embodiment of sponge is said
Bright, sponge will be illustrated using embodiment therebetween.
The filter screen structure schematic diagram that Fig. 1 makes for sponge, this screen pack is only for illustrating sponge, it is apparent that this is not
Mean that sponge provided in an embodiment of the present invention only can serve as screen pack, it is true that every need repeatedly to wash, dust containing capacity high, right
Small suspended particles have the environment of preferable filter effect, all can be fabricated to sponge provided in an embodiment of the present invention as needed
The shape needing.Meanwhile, the regularly or irregularly lines of in figure are the signals of chopped fiber, but regularly or irregularly
The shape of lines and its expression is all served only for illustrating, and not so representative products do not have these regularly or irregularly lines yet
And shape, those skilled in the art should understand the structure of the actual capabilities of sponge according to usual knowledge.In Fig. 1, the left side is
Top view, the right is side view, then as shown in figure 1, including fiber in sponge, wherein：
Sponge aperture is 0.5-1.5mm；
Fibre length is 1-5mm.
In enforcement, fiber is the fiber with electrostatic adsorption.
Specifically, fiber can be the fiber that one of following material or a combination thereof are made：PP, PE, PET, flaxen fiber, cotton
Fiber.
Fiber can be as follows in being embodied as：
When described fiber is PP, a diameter of 0.5-9 μm, sheet resistance is 2 × 1015Ω-2×1016Ω；
When described fiber is PE, a diameter of 5-10 μm, sheet resistance is 3 × 1016Ω-3×1017Ω；
When described fiber is PET, a diameter of 0.1-3 μm, sheet resistance is 2.5 × 1017Ω-2.5×1018Ω；
When described fiber is ramie, fineness is 30-40 μm, and length is 20-250mm；
When described fiber is flax, fineness is 12-17 μm, and length is 17-25mm；
When described fiber is jute, fineness is 15-18 μm, and length is 1.5-5mm；
When described fiber is bluish dogbane, fineness is 18-27 μm, and length is 2-6mm；
When described fiber is hemp, fineness is 15-17 μm, and length is 15-25mm；
When described fiber is bluish dogbane, fineness is 17-23 μm, and length is 20-25mm；
When described fiber is sisal hemp, fineness is 20-23 μm, and length is 2.7-4.4mm；
When described fiber is medium staple cotton, fineness is 15-20 μm, and length is 25-35mm；
When described fiber is long-staple cotton, fineness is 18-23 μm, and length is ＞ 33mm.
Preparation for making sponge is easier to understand, and the preparation of fiber is implemented also to be said in the preparation scheme of sponge
Bright, the preparation to sponge below illustrates.
Fig. 2 is the preparation method implementation process diagram of sponge, as illustrated, can include：
Step 201, fibre cutting is become the fiber that length is 1-5mm；
In mixture used in step 202, the fiber addition polyurethane sponge preparation process by cut-out；
Step 203, sponge is prepared into by polyurethane sponge preparation technology.
In enforcement, foaming process can for the PU (polyurethane, polyurethane) adopting in polyurethane sponge preparation technology
Think block bubble method or method of molding.Also will taking the enforcement of both approaches as a example illustrate below, method is steeped with block or method of molding is
Example is because that both approaches are most commonly seen, is also to be easier to implement, so being steeped as a example method or method of molding by block；But
It is that technical scheme provided in an embodiment of the present invention is during sponge foaming to add the short fibre with electrostatic adsorption
Dimension, thus being allowed to repeatedly to wash, dust containing capacity is high, have preferable filter effect to small suspended particles, therefore, with other seas
Continuous preparation scheme is also feasible, only need to be added in corresponding preparation link according to the preparation principle of sponge and have Electrostatic Absorption work
Chopped fiber, block bubble method or method of molding are only used for instructing how those skilled in the art specifically implement the present invention, but not
Meaning is only capable of steeping method or method of molding using block, can determine corresponding preparation scheme in conjunction with putting into practice needs in implementation process.
In good time illustrating to fiber preparation first, the fiber adding in enforcement is the fibre with electrostatic adsorption
Dimension, fiber can be prepared or finished product.Fiber can be the fiber that one of following material or a combination thereof are made：PP、PE、PET、
Flaxen fiber, cotton fiber, also illustrate main by as a example below.It is because them more typically taking these fibers as a example,
It is readily available, prepare, so here by as a example；But, in theory, with other fibers or similar material or
Person adopts the identical fiber that other preparation schemes obtain also possible, as long as the material adding has electrostatic adsorption,
And/or meeting the performance shown in embodiment, the fiber of citing is only used for instructing those skilled in the art specifically how real
Apply the present invention, but it is not intended that being only capable of using the preparation scheme in above-mentioned fiber or example, can need in conjunction with practice in implementation process
To determine corresponding material and to prepare scheme accordingly.
A, preparation PP fiber
The PP1300 weighing 18-20g is fused to dilution in 42-47g atoleine, makees oil bath using glycerine, 200～210
Stir 1～2min at a temperature of DEG C, under 13000～14000rpm, so that polymer is mixed with paraffin.By the PPI300 preparing
Dilution cooled and solidified, coagulum (mixture of PPI300 and paraffin) is transferred in the expects pipe that end carries spinning head, will
Expects pipe is put and is heated to 225-265 DEG C in the heater and so that coagulum is melted completely, keeps melt temperature and voltage constant (15-
17.5KV), fltting speed is 0.004-0.008mm/s, and receiving range is to carry out melting electrostatic spinning under 2-6cm, then will melt
70-80 DEG C of insulating box 40-50min put into by the fiber melting electrostatic spinning, obtains PP fiber.
B, preparation PE fiber
The PEFI7B weighing 18-20g is fused to dilution in 42-47g atoleine, makees oil bath using glycerine, 180～190
Stir 1～2min at a temperature of DEG C, under 13000～14000rpm, so that polymer is mixed with paraffin.By the PEFI7B preparing
Dilution cooled and solidified, coagulum (mixture of PEFI7B and paraffin) is transferred in the expects pipe that end carries spinning head, will
Expects pipe is put and is heated to 200-245 DEG C in the heater and so that coagulum is melted completely, keeps melt temperature and voltage constant (15-
17.5KV), fltting speed is 0.004-0.008mm/s, and receiving range is to carry out melting electrostatic spinning under 2-6cm, then will melt
70-80 DEG C of insulating box 40-50min put into by the fiber melting electrostatic spinning, obtains PE fiber.
C, preparation PET
Weigh 2-3gPET solid particle in conical flask, measure 20-30mL mixed solvent (volume ratio：Trifluoroacetic acid：
CH2Cl2=9：1) stand froth breaking after, magnetic agitation 24-30h makes it fully dissolve, obtain electrostatic spinning solution.Prepare
Spinning mixed solution is transferred in the expects pipe that end carries spinning head, and holding spinning voltage (15-18KV) is constant, and fltting speed is
0.001-0.002mm/s, receiving range is to carry out electrostatic spinning under 13-16cm, then the fiber of electrostatic spinning is put into 40-50
DEG C insulating box 120-160min, obtains PET.
D, finished fiber
Flaxen fiber (ramie, flax, jute, bluish dogbane, hemp, bluish dogbane, sisal hemp), cotton fiber (medium staple cotton, long-staple cotton) etc.
Finished fiber.
The performance of the fiber obtaining after preparation can be as follows：
The performance of finished fiber：
Below to step 202,203, by cut-out fiber add polyurethane sponge preparation process used in mixture
In, illustrated by the enforcement that polyurethane sponge preparation technology is prepared into sponge.As described above, being embodied as to steep method with block
Illustrate with as a example method of molding.That is, in implementing, fiber being added to PU foaming process and is prepared in preparation process and have
The filtration sponge of electrostatic adsorption, the fiber of addition can be prepared or finished product, and PU foaming process can be block bubble or mold,
The purpose of this process is, will add the chopped fiber of electrostatic adsorption, thus it is uniform to be prepared into chopped fiber in foaming process
It is distributed in the filter cotton in polyurethane sponge.
First, in enforcement when steeping method and method of molding using block, Ingredient Amount can be as shown in the table：
In enforcement, PPG can be arbitrary in polyether triol, oxolane ether glycol, the equal PTMEG of THF-
Plant or several mixtures, molecular weight is 2800-3300, hydroxyl value is：54～57mgKOH/g.
Then method is steeped to block and the enforcement of method of molding is respectively described below：
1st, block bubble method
As shown above, when PU foaming process is for block bubble method, the mixture used in polyurethane sponge preparation process
Including：Water, dichloromethane, triethylenediamine, silicone oil, PPG.
Can be as follows in being embodied as, water is 2.5-4 part, dichloromethane is 2-9 part, triethylenediamine is 0.4-0.6
Part, silicone oil are 2-3 part, PPG is 60-100 part.
In enforcement, when sponge is prepared into by polyurethane sponge preparation technology, can include：
Mixture is mixed；
Add isocyanates stirring mixing；
Naturally cure.
In being embodied as, mixture mixes and carries out at temperature is for 23-27 DEG C；
The isocyanates adding is 30-40 part, and mixing speed is 900-1000r/min, and mixing time is 10-15s；
Naturally the time of curing is 72h.
Specifically, preparing or finished fiber are cut off with fibre cutting machine, sheared length is between 1-5mm.By 5-10
The fiber that part cuts is added to 2.5-4 part water, 2-9 part dichloromethane, 0.4-0.6 part triethylenediamine, 2-3 part silicone oil, 60-
In the mixture of 100 parts of PPGs, mixed by equipment such as static mixer, dynamic mixer, agitators, temperature
For 23-27 DEG C, it is subsequently adding 30-40 part isocyanates (TDI) stirring mixing, mixing speed 900-1000r/min, mixing time
10-15s, 72h naturally cure cutting and get product.
2nd, method of molding
As shown above, when PU foaming process is method of molding, the mixture used in polyurethane sponge preparation process
Including：Water, triethylenediamine, silicone oil, PPG.
Can be as follows in being embodied as, water is 2.5-4 part, triethylenediamine is 0.4-0.6 part, silicone oil is 2-3 part, poly-
Ethoxylated polyhydric alcohol is 60-100 part.
In enforcement, when sponge is prepared into by polyurethane sponge preparation technology, can include：
Mixture is mixed；
Add isocyanates stirring mixing；
Inject the mixture in autoclave and seal, do not heated up with after the inert gas purging of raw material reaction with a small amount of；
Injection inert gas, saturation under constant temperature and pressure；
Unload and be depressed into normal pressure.
In being embodied as, mixture mixes and carries out at temperature is for 23-27 DEG C；
The isocyanates adding is 30-40 part, and mixing speed is 900-1000r/min, and mixing time is 10-15s；
Time with inert gas purging is 2-3min, is warmed up to 40-50 DEG C；
To 20MPa, under constant temperature and pressure, saturation time is 48h to injection inert gas.
Specifically, preparing or finished fiber are cut off with fibre cutting machine, sheared length is between 1-5mm.By 5-10
The fiber that part cuts is added to 2.5-4 part water, 0.4-0.6 part triethylenediamine, 2-3 part silicone oil, 60-100 part polyether polyols
In the mixture of alcohol, mixed by equipment such as static mixer, dynamic mixer, agitators, temperature is 23-27 DEG C, so
30-40 part isocyanates (TDI) stirring is added to mix afterwards, mixing speed 900-1000r/min, mixing time 10-15s, then
Inject the mixture in autoclave and seal, with a small amount of not with the inert gas of raw material reaction (as CO2)、N2, Ar etc.) purging
2-3min, is warmed up to 40-50 DEG C, is then injected into inert gas to 20MPa, saturation 48h under constant temperature and pressure, then unloads and is often depressed into
Pressure, taking-up gets product.
After preparing filtration sponge, in the embodiment of the present invention, also correspondingly provide the using method and of sponge
Plant laser projection device.Specific embodiment is described as follows：
Fig. 3 is the using method implementation process diagram of sponge, the sponge in above-described embodiment used in it, then as schemed
Shown, can include：
Described sponge is made filtration sponge by step 301, shape on demand；
Step 302, using described filtration sponge Chalk-dust filtering.
In enforcement, it is possible to use described filtration sponge Chalk-dust filtering at laser projection device air intake vent.
Fig. 4 is laser projection device screen pack application site schematic diagram, and the in figure left side is schematic perspective view, and the right is to correspond to
Side view, as illustrated, in laser projection device, including：Sponge as above；Wherein：Sponge is located at laser projection
At equipment air intake vent.
Further, additionally provide a kind of filter in the embodiment of the present invention, include above-mentioned filtration in filter
Sponge, e.g., above-mentioned filtration sponge, or the filtration sponge that profit prepares with the aforedescribed process.Specifically, this filter
Using such filtration sponge, can be not only used for the higher electronic equipment of this cleanliness factor of laser projection device, can be used for
Some high precision electronic equipments, other needs can also use using in the product of filter, for example：Air-conditioning etc., all
This filter can be applied.
In sum, provide in the embodiment of the present invention have filtration sponge of electrostatic adsorption and preparation method thereof and
Application in laser projection device.The filtration sponge with electrostatic adsorption of preparation is by filtering sponge foaming mistake
The chopped fiber with electrostatic adsorption is added in journey, due to having the addition of chopped fiber so as to have electrostatic adsorption, and can
Washing, dust containing capacity are high repeatedly, have preferable filter effect to small suspended particles (particularly PM2.5, PM10).If apply swashing
Dustproof effect can be played at light projecting device air intake vent, big dust granule can either be stopped, utilize electrostatic to inhale simultaneously
Attached effect also can be adsorbed to small particle, thus improving the cleanliness factor within laser projection device, prevents dust granules
In access arrangement light path, cause laser instrument or optical mirror slip to cover dirt, cause light decay phenomenon, the use longevity of impact laser projection device
Life.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprise these changes and modification.
Claims (10)
1. a kind of filtration sponge is it is characterised in that include fiber, wherein in described filtration sponge：
Sponge aperture is 0.5-1.5mm；
Fibre length is 1-5mm, and described fiber is the fiber with electrostatic adsorption.
2. sponge as claimed in claim 1 is it is characterised in that described fiber is one of following material or a combination thereof is made
Fiber：Polypropylene PP, polythene PE, polyethylene terephtalate, flaxen fiber, cotton fiber.
3. sponge as claimed in claim 2 it is characterised in that
When described fiber is PP, a diameter of 0.5-9 μm, sheet resistance is 2 × 1015Ω-2×1016Ω；
When described fiber is PE, a diameter of 5-10 μm, sheet resistance is 3 × 1016Ω-3×1017Ω；
When described fiber is PET, a diameter of 0.1-3 μm, sheet resistance is 2.5 × 1017Ω-2.5×1018Ω；
When described fiber is ramie, fineness is 30-40 μm, and length is 20-250mm；
When described fiber is flax, fineness is 12-17 μm, and length is 17-25mm；
When described fiber is jute, fineness is 15-18 μm, and length is 1.5-5mm；
When described fiber is bluish dogbane, fineness is 18-27 μm, and length is 2-6mm；
When described fiber is hemp, fineness is 15-17 μm, and length is 15-25mm；
When described fiber is bluish dogbane, fineness is 17-23 μm, and length is 20-25mm；
When described fiber is sisal hemp, fineness is 20-23 μm, and length is 2.7-4.4mm；
When described fiber is medium staple cotton, fineness is 15-20 μm, and length is 25-35mm；
When described fiber is long-staple cotton, fineness is 18-23 μm, and length is ＞ 33mm.
4. a kind of preparation method of described sponge as arbitrary in claims 1 to 3 is it is characterised in that include：
Fibre cutting is become the fiber that length is 1-5mm；
The fiber of cut-out is added in the mixture used in polyurethane sponge preparation process；
By polyurethane sponge, preparation technology is prepared into sponge.
5. method as claimed in claim 4 is it is characterised in that the polyurethane PU adopting in polyurethane sponge preparation technology is sent out
When bubble process is for block bubble method, the mixture used in polyurethane sponge preparation process includes：Water, dichloromethane, triethylene
Diamines, silicone oil, PPG.
6. method as claimed in claim 5 is it is characterised in that described be prepared into sponge by polyurethane sponge preparation technology,
Including：
Mixture is mixed；
Add isocyanates stirring mixing；
Naturally cure.
7. method as claimed in claim 4 is it is characterised in that the polyurethane PU adopting in polyurethane sponge preparation technology is sent out
When bubble process is method of molding, the mixture used in polyurethane sponge preparation process includes：Water, triethylenediamine, silicone oil,
PPG.
8. method as claimed in claim 7 is it is characterised in that described be prepared into sponge by polyurethane sponge preparation technology,
Including：
Mixture is mixed；
Add isocyanates stirring mixing；
Inject the mixture in autoclave and seal, do not heated up with after the inert gas purging of raw material reaction with a small amount of；
Injection inert gas, saturation under constant temperature and pressure；
Unload and be depressed into normal pressure.
9. a kind of filter it is characterised in that filter include filter sponge, wherein, described filtration sponge be as
The arbitrary described filtration sponge of claims 1 to 3, or the filtration that described method as arbitrary in claim 4 to 8 prepares
Sponge.
10. a kind of laser projection device is it is characterised in that include：Described sponge as arbitrary in claims 1 to 3, or as right
The sponge that 4 to 8 arbitrary described methods of requirement prepare；Wherein：
Described sponge is located at laser projection device air intake vent.
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| CN201610851622.4A CN106390591A (en) | 2016-09-26 | 2016-09-26 | Filtering sponge and preparation thereof, filtering device and laser projection equipment |
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| CN201610851622.4A CN106390591A (en) | 2016-09-26 | 2016-09-26 | Filtering sponge and preparation thereof, filtering device and laser projection equipment |
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| CN106390591A true CN106390591A (en) | 2017-02-15 |
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| CN201610851622.4A Pending CN106390591A (en) | 2016-09-26 | 2016-09-26 | Filtering sponge and preparation thereof, filtering device and laser projection equipment |
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Cited By (1)
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