CN109181676A - A kind of overlay film backing material - Google Patents
A kind of overlay film backing material Download PDFInfo
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- CN109181676A CN109181676A CN201811161979.5A CN201811161979A CN109181676A CN 109181676 A CN109181676 A CN 109181676A CN 201811161979 A CN201811161979 A CN 201811161979A CN 109181676 A CN109181676 A CN 109181676A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K8/805—Coated proppants
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Abstract
The invention belongs to the fluid minerals production technique such as petroleum, natural gas and shale gas fields, specifically disclose a kind of overlay film backing material, including aggregate and the coat being coated on aggregate, the coat includes inner layer resin film and outermost resin film, drag reducer is added between the outermost resin film and inner layer resin film, the drag reducer described by mass is the 0.8-2% of aggregate, and the outermost resin film includes amines additives, and the apparent density of the overlay film backing material is 1.05-2.60g/cm3.The overlay film backing material of this programme can suspend in clear water, while meeting industry basic demand, the substance of the thickeninies such as addition guar gum is not needed in fracturing process, cost is greatly reduced, fracturing unit and technique have been simplified, reduces the pollution to environment, good guide performance simultaneously, construction efficiency is improved, addition drag reducer can be such that the frictional resistance of load fluid in fracturing process substantially reduces, meet the requirement of pressure in pressing crack construction process.
Description
Technical field
The invention belongs to the fluid minerals production technique field such as petroleum, natural gas and shale gas more particularly to a kind of overlay films
Backing material.
Background technique
Hydraulic fracturing technology at home and abroad comparative maturity, petroleum fracturing propping agent is as essential in fracturing process
One of article, performance superiority and inferiority will directly influence fracturing effect, and apparent density is to evaluate the important finger of proppant performance
One of mark, apparent density is lower, and it is lower relative to the relative density of fracturing fluid, after proppant is mixed with pressure break carrying liquid, depending on
The lower density the easier to suspend in fracturing fluid, to greatly reduce the rate of settling.It will pump farther in pumping procedure.
High pumping pressure pumps fluid into well, while rock stratum of splitting is to allow hydrocarbons preferably to pass through.However, removing non-pressure
It keeps, the aperture otherwise newly formed is closed.In order to open and keep path, support is injected simultaneously during pumping fluid
Agent, support needed for keeping aperture with generation.When forming crack, biography when proppant passes through release hydraulic pressure in the slurry
It passs, proppant forms the filling or support for staying open crack herein.
With the development that domestic petroleum fracturing propping agents produce, miscellaneous proppant emerges one after another, such as covers
Film proppant.And for domestic fracturing technology mainly based on quartz sand and haydite, quartz sand is mainly used in the low closure of shallow-layer at present
The fracturing work of pressure well, haydite is mainly used in middle-deep well fracturing technology, but the resistant to breakage ability of quartz sand and haydite is equal
It is limited, it is difficult to adapt to hyperbaric environment.And overlay film proppant is by enhancing the intensity of proppant in aggregate surface overlay film, to improve
Proppant resists broken ability.Currently, the coating film of overlay film proppant common are phenolic resin film, epoxy resin film at present
With urethane resin film etc..
So substantially to consider how that improving resin film (covers phenolic resin film, epoxy resin film and polyurethane at present
Resin film etc.) intensity, but the suspendability of proppant is not improved, this kind of overlay film proppant pressing crack construction is used
When usually require preparing the carrying liquid with viscoelasticity, traditional carrying liquid making method is that a large amount of thickening is added in water
The viscoelasticity that agent (substances such as guar gum) increases its own enables overlay film proppant to suspend in carrying liquid, but the disadvantage is that
It will lead to that pressure break higher cost, reservoir damage are serious, pollute the environment after addition thickener, therefore be badly in need of one kind now
The proppant that can be suspended in clear water.
Existing proppant can be in water from there are two main classes the technology of suspension, first is that on aggregate quartz sand or haydite surface
Overlay film layer of material, this material are mainly some water-soluble high-molecular materials, such as polyacrylamide, carboxymethyl cellulose, are gathered
Acrylic acid, guar gum, natural plant gum etc..These materials are met water energy and are expanded rapidly, and the viscosity that can dissolve into increase water in water reaches outstanding
Floating purpose.The technology for not changing suspension fundamentally from suspended prop of this technology, only thickener overlay film
On aggregate, environmental issue is not solved, cost is reduced without really realizing, increases production and improves productivity.Another technology is to change
The apparent density of aggregate makes the haydite or resin beads of extremely-low density.Such product is able to achieve really half to suspend in water,
The rate of settling of proppant in water is reduced, but since apparent density to be greatly lowered, production cost is greatly increased, and
The performance of proppant, such as broken, sour molten, water conservancy diversion performance can be substantially reduced.And the production efficiency of resin beads is low, it is at high cost etc.
Defect also limits its popularization and use.And although above-mentioned proppant can be realized from suspension in water, but carry the frictional resistance of liquid
It is enhanced, so that proppant could be pumped into corresponding position by applying the higher pump pressure of man-hour requirement, improves
Construction cost.
Summary of the invention
That the purpose of the present invention is to provide a kind of drag-reduction effects is good, from the good overlay film backing material of suspendability.
In order to achieve the above object, base case of the invention are as follows: a kind of overlay film backing material, including aggregate and be coated on
Coat on aggregate, the coat include inner layer resin film and outermost resin film, the outermost resin film and inner layer resin
Drag reducer is added between film, the drag reducer described by mass is the 0.8-2% of aggregate, and the outermost resin film includes that amine adds
Add agent, the apparent density of the overlay film backing material is 1.05-2.60g/cm3。
The working principle of this base case is: in actual use, overlay film backing material can suspend or half suspends
In water, in pressing crack construction, mixture is pumped in the crack of lithosphere, overlay film backing material can enter crack with water
In play a supporting role.
The beneficial effect of this base case is: adding drag reducer between internal layer resin film and outermost resin film, makes to cover
For film backing material with clear water mixed process, the part draft reduction material between inner layer resin film and outermost resin film can be molten rapidly
Into in load fluid, the frictional resistance of clear water is reduced, makes overlay film backing material that also there is good guide performance in clear water, reaches corresponding
Technique requirement, compared with the existing technology for this programme eliminate the auxiliary additives such as slippery water, reduce construction cost, letter
Change construction technology, reduces equipment requirement.Since drag reducer addition is between internal layer resin film and outermost resin film, from suspension
The variation of the performances such as performance and sphericity is not too large, and in order to ensure the drag reducing efficiency of overlay film backing material, the drag reducer matter of addition
In the range of aggregate quality 0.8-2%, the quality of drag reducer addition is compared with addition is on overlay film backing material surface for amount control
Increased, so that overlay film backing material is followed and carry the corresponding destination of liquid arrival.Overlay film support in this programme simultaneously
The rate of dissolution of material is fast, can be dissolved in clear water in 3-15s, and in construction, overlay film backing material is quickly dissolved in clearly
Water may be implemented huge discharge operation, greatly improve working efficiency.
Overlay film backing material in this programme includes internal layer and outer layer two layers of resin film, and aggregate is enable to be wrapped completely
It covers, inner layer resin film can guarantee the integral strength of overlay film backing material, guarantee the resistant to breakage rate of overlay film backing material.
In work progress, the reserved group in the resin film on backing material surface can react rapidly generation largely after meeting water
Gas molecules, these gas molecules or are enclosed in resin film to expand against resin membrane body stage and thicken and increase support
The equivalent diameter of material granule body, or be attached to the extension of backing material surface stage or be gathered in backing material resin film and water
The gas blanket of one layer of package backing material granule is formed on the interface of body contact, this gas blanket is between backing material granule
Formation stages are connected to and the result closed causes simple grain backing material to form more loose cotton wadding in water body to gather shape, this
Sample is greatly lowered the relative density of backing material in water, so as to make backing material suspend in water, realizes and uses
Clear water (carries liquid certainly and is also not only limited to clear water, can also be the carrying liquid added with thickener) as carrying liquid.Backing material exists
When moving in water, the protrusion of the curved surface on backing material resin film can reduce the backing material rate of settling in water；Part settles
The backing material accumulated to water bottom reduces the tight of backing material settled layer because of the more protrusion of its surface resin film
Solidity, intergranular water body amount is more compared with conventional particle stack, and then when water body can be more the fluidity with very little
Add and easily push the separation of its congeries and movement, realizes that backing material preferably suspends in water, make the support in this programme
While material meets the basic pressure break of industry and requires, the thickeners such as addition guar gum are not needed in fracturing process, are dropped significantly
Low cost has simplified fracturing unit and technique, reduces the pollution to environment, and may be implemented using clear water as carrying liquid
Huge discharge operation, improves working efficiency.
Apparent density range is 1.05-2.60g/cm3Overlay film backing material comprehensive bulk density can be formed in clear water
In 0.6~1.3g/cm3Solid-liquid mixing, when such solid-liquid mixing is applied certain mechanical stirring momentum, overlay film
Backing material can be more evenly distributed in clear water, and the overlay film branch in mixed liquor can be made when mixed liquor reaches certain flow rate
Timbering material compared to traditional overlay film and can support from the reservoir fracture that suspended state carries out under long distance delivery to recovery well
Material reaches slot height distribution support of totally cleaving, and improves the rate of growth of petroleum etc..
Further, the drag reducer preparation step is as follows, as mass fraction the water of addition 85-93%, and the third of 5-10%
Acrylamide and acrylamide derivative, the acrylic acid and methacrylic acid of 0.5-2%, the 2- acrylamide -2- methyl-prop of 1-5%
The methylpropene sodium sulfonate of sulfonic acid and 0.5-3% stirs 150-220rpm, and is warming up to 40-70 DEG C, and above-mentioned gross mass is added
The initiator of 0.3-2%, reacts through 3-40min, is down to room temperature.
Further, the outermost resin film is urethane resin film, and the inner layer resin film is urethane resin film, epoxy
Resin film and phenolic resin film it is one or more.Urethane resin film can generate several nanometers under the action of amines additives
Grade protrusion reduces the volume density and apparent density of overlay film backing material on surface, while urethane resin film being capable of shape when meeting water
At bubble, to can be improved overlay film backing material to a certain extent from suspendability, inner layer resin film polyurethane resin
Film, epoxy resin film or phenolic resin film cladding can guarantee the intensity of overlay film backing material.
Further, the amines additives are diethylenetriamine, triethylamine, ethamine, diethylamine, one in triethylene tetramine
Kind is a variety of.Cheap, the excellent catalytic effect of these types of amines additives is conducive to the formation of protrusion.
Further, the initiator is azo diisobutyl amidine hydrochloride, two isobutyl imidazoline hydrochloride of azo, azo two
The one or more of cyanopentanoic acid, azo dicyclohexyl formonitrile HCN.
Further, the overlay film backing material includes the material of following mass fraction, and 100 parts of aggregate, inner layer resin film
0.25-5 parts, 0.25-5 parts of outermost resin film, the amines additives quality is the 1/100-20/100 of outermost resin film quality.
Further, the outermost resin film is made of polyalcohols resin, catalyst and Isocyanates curing agent, polynary
The equivalent of alcohol resinoid hydroxyl is 60-300, and Isocyanates curing agent quality is polyalcohols resin quality in outermost resin film
40-80%, catalyst quality be outermost resin film in polyalcohols resin quality 1/1000-1/100.Applicant is long-term
Practice in find, polyalcohols resin, isocyanates control in above range, produce entirely different with current material performance
Performance, firstly, polyalcohols resin reacted with isocyanate groups generate have micro protrusion urethane resin film, due to
It further include amines additives, amines additives can be to isocyanate group in polyalcohols resin and isocyanate groups reaction process
Facilitation is played in the reaction of group, makes to generate a large amount of mutually isolated bubbles inside urethane resin film, bubble is closed in poly-
Inside urethane resin film, so that bubble forms a large amount of protrusion in polyurethane resin film surface, bump sizes between 100~
500nm, protrusion have random point of heterogencity in coating layer surface random distribution, in the surface resin film of single particle body
Cloth, converting has 1~40 or so protrusion for the surface of 100 square micron every under homogeneous distribution state, reduce apparent density and
Volume density improves it from suspendability.Simultaneously because the equivalent of polyalcohols resin hydroxyl is 60-300, isocyanate is extremely
It is less the 40% of polyalcohols resin, after isocyanates and whole polyalcohols resin reaction generation urethane resin films, also
Remain part isocyanate groups not reacted, so that there is also isocyanate groups in urethane resin film at this time, when
Remaining isocyanate groups are reacted with water and can be surrounded in the chain element of resin film when the backing material of this programme meets water
Gas is generated in microcosmic small space body, this small quantity gas is gradually increased volume under the promotion of reaction energy and forms bubble, and
It pushes resin film to increase in the radial dimension of backing material particle, reaches the dilation for coating layer surface most preferably, thus into one
Step reduces the apparent density and volume density of backing material, while isocyanate is at most the 80% of polyalcohols resin, is made
The volume of the bubble of generation is unlikely to too big and bubble is caused to be easy breakage etc., and makes the quantity of the bubble generated will not mistake
It is more, making all to be mutually isolated between a large amount of bubbles, causing air bubble intensity to reduce without there are problems that bubble contacts with each other.
Further, the catalyst is one or more of alkyls tin compound and/or alkyls lead compound
Mixture.
Further, alkyls tin compound is one of dibutyl tin dilaurate, tributyl tin or several mixed
Object is closed, alkyls lead compound is one of lead tetraethide, isooctyl acid lead or several mixtures.Above-mentioned several catalyst
Cost performance it is high, solidification rate and the intensity performance of coat can be accelerated.
Further, Isocyanates curing agent is toluene di-isocyanate(TDI), methylenediphenyl diisocyanates, different Fo Er
One or more of ketone diisocyanate, methyl diphenylene diisocyanate.Select above-mentioned several isocyanates solidifications
Agent can accelerate the formation of coat, improve working efficiency.
Detailed description of the invention
Fig. 1 is the electron-microscope scanning figure of the overlay film backing material of embodiment 1.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Raw material is selected:
Aggregate selects one or more of haydite, quartz sand, selects haydite in present embodiment as an example, pottery
Grain apparent density is 1.05~2.65g/cm3, circularity >=0.7, sphericity >=0.7, resistant to breakage rate≤3% (86mpa), acid solubility≤
5%, granularity is 20~140 mesh.
Outermost resin film is urethane resin film, and inner layer resin film is urethane resin film, epoxy resin film and phenolic aldehyde tree
Adipose membrane it is one or more.
Polyalcohols resin is the polymer one or several kinds of ethylene glycol, propylene glycol, glycerine, polyalcohols resin hydroxyl
The equivalent of base is 60-300.
Isocyanates curing agent, toluene di-isocyanate(TDI), methylenediphenyl diisocyanates, two isocyanide of isophorone
One or more of acid esters, methyl diphenylene diisocyanate.
Catalyst is the mixture of one or more of alkyls tin compound and/or alkyls lead compound, preferably
For one of dibutyl tin dilaurate, tributyl tin, lead tetraethide, isooctyl acid lead or several mixtures.
Amines additives select one of diethylenetriamine, triethylamine, ethamine, triethylene tetramine, ethylenediamine or more
Kind.
The mass fraction of overlay film backing material material is respectively 100 parts of aggregate, and 0.25-5 parts of inner layer resin film, outer layer tree
0.25-5 parts of adipose membrane, the drag reducer quality is the 0.8-2% of aggregate, and Isocyanates curing agent quality is in outermost resin film
The 40-80% of polyalcohols resin quality, the amines additives quality are the 1/100-20/100 of outermost resin film quality, are urged
Agent quality is the 1/1000-1/100 of polyalcohols resin quality in outermost resin film.
Drag reducer, as mass fraction be added 85-93% water, the acrylamide and acrylamide derivative of 5-10%,
The acrylic acid and methacrylic acid of 0.5-2%, the 2- acrylamide-2-methyl propane sulfonic of 1-5% and the metering system of 0.5-3%
Sodium sulfonate stirs 150-220rpm, and is warming up to 40-70 DEG C, the initiator of above-mentioned gross mass 0.3-2% is added, through 3-40min
Reaction, is down to room temperature and obtains required drag reducer.Wherein initiator includes azo diisobutyl amidine hydrochloride, two isobutyl imidazoles of azo
Quinoline hydrochloride, azo dicyano valeric acid, azo dicyclohexyl formonitrile HCN one or more.
Embodiment 1
Taking apparent density is 1.05g/cm3, granularity be 100 parts of haydite of 20/40,175-185 DEG C is heated to, by the pottery of heating
Grain pours into inside bowl-type mulling pot, and 2 parts of epoxy resin stirrings are then added；Temperature is down to 150-160 DEG C, and 0.2 part of modification is added
Aromatic amine curing agent (T31) simultaneously stirs；Temperature is down to 140-150 DEG C, and 0.8 portion of drag reducer is added and is mixed；Temperature is down to
80-90 DEG C, 2 parts of glycol polymers and the stirring of 0.02 part of dibutyl tin dilaurate are added；Temperature is down to 70-80 DEG C, adds
Enter 0.2 part of ethylenediamine stirring；Temperature is down to 60-70 DEG C, and 0.8 part of toluene di-isocyanate(TDI) stirring is added；Temperature is down to 40-50 DEG C
It takes the dish out of the pot.Epoxy resin and modified aromatic amine curing agent generate inner layer resin film, and inner layer resin film is epoxy resin film；The third three
Alcohol, dibutyl tin dilaurate, diethylenetriamine and toluene di-isocyanate(TDI) generate outermost resin film, and outermost resin film is poly- ammonia
Ester resin film, as shown in Figure 1, overlay film backing material outer surface has nanoscale protrusion.
Embodiment 2
Taking apparent density is 1.65g/cm3, granularity be 100 parts of haydite of 30/50,220-230 DEG C is heated to, by the pottery of heating
Grain pours into inside bowl-type mulling pot, and 3 parts of phenolic resin stirrings are then added；Temperature is down to 190-200 DEG C, be added 0.6 part six times
Tetramine simultaneously stirs；Temperature is down to 180-190 DEG C, adds 1.2 parts of drag reducer mixing；Temperature is down to 120-130 DEG C, is added
4 parts of glycerine polymer and the stirring of 0.02 part of isooctyl acid lead；Temperature is down to 100-110 DEG C, and 0.2 part of triethylamine stirring is added；
Temperature is down to 90-100 DEG C, and 2 parts of methylenediphenyl diisocyanates stirrings are added；Temperature is down to 60-70 DEG C and takes the dish out of the pot.
Embodiment 3
Taking apparent density is 2.05g/cm3, granularity be 100 parts of haydite of 40/70,80-90 DEG C is heated to, by the haydite of heating
It pours into inside bowl-type mulling pot, 2 parts of ethylene glycol polymers and the stirring of 0.02 part of tributyl tin is then added；Temperature is down to 75-
85 DEG C, 0.6 part of isophorone diisocyanate is added and stirs；Temperature is down to 65-75 DEG C, adds 1.6 parts of drag reducer mixing；
Temperature is down to 55-65 DEG C, and 4 parts of glycerine polymer and the stirring of 0.02 part of isooctyl acid lead are added；Temperature is down to 45-55 DEG C, adds
Enter 0.2 part of triethylamine stirring；Temperature is down to 35-45 DEG C, and 2.4 parts of methylenediphenyl diisocyanates stirrings are added；Temperature drop
It takes the dish out of the pot to 30-40 DEG C.
Embodiment 4
Taking apparent density is 2.65g/cm3, granularity be 100 parts of haydite of 70/140,150-160 DEG C is heated to, by heating
Haydite pours into inside bowl-type mulling pot, and 2 parts of ethylene glycol polymers and the stirring of 0.02 part of tributyl tin are then added；Temperature is down to
130-140 DEG C, 0.6 part of isophorone diisocyanate is added and stirs；Temperature is down to 120-130 DEG C, adds 2 portions of drag reducers
Mixing；Temperature is down to 100-110 DEG C, and 4 parts of glycerine polymer and the stirring of 0.02 part of isooctyl acid lead are added；Temperature is down to 90-
100 DEG C, 0.2 part of triethylamine stirring is added；Temperature is down to 80-90 DEG C, and 3.2 parts of methylenediphenyl diisocyanates are added and stir
It mixes；Temperature is down to 50-60 DEG C and takes the dish out of the pot.
Comparative example 1
Taking apparent density is 1.05g/cm3, granularity be 100 parts of haydite of 20/40,175-185 DEG C is heated to, by the pottery of heating
Grain pours into inside bowl-type mulling pot, and 2 parts of epoxy resin stirrings are then added；Temperature is down to 150-160 DEG C, and 0.2 part of modification is added
Aromatic amine curing agent (T31) simultaneously stirs；Temperature is down to 140-150 DEG C, adds 0.8 part of drag reducer mixing；Temperature is down to 80-
90 DEG C, 2 parts of epoxy resin stirrings are added；Temperature is down to 70-80 DEG C, and 0.2 part of ethylenediamine stirring is added；Temperature is down to 60-70 DEG C,
0.2 part of modified aromatic amine curing agent (T31) stirring is added；Temperature, which is down to 40-50 DEG C and takes the dish out of the pot, (obtains overlay film backing material
Inner layer resin film and outermost resin film are epoxy resin film).
Comparative example 2
Taking apparent density is 1.65g/cm3, granularity be 100 parts of haydite of 30/50,220-230 DEG C is heated to, by the pottery of heating
Grain pours into inside bowl-type mulling pot, and 3 parts of phenolic resin stirrings are then added；Temperature is down to 190-200 DEG C, be added 0.6 part six times
Tetramine simultaneously stirs；Temperature is down to 180-190 DEG C, adds 0.8 part of drag reducer mixing；Temperature is down to 120-130 DEG C, is added
4 parts of phenolic resin stirrings；Temperature is down to 100-110 DEG C, and 0.2 part of triethylamine stirring is added；Temperature is down to 90-100 DEG C, is added
0.8 part of hexamethylenetetramine simultaneously stirs；Temperature be down to 60-70 DEG C take the dish out of the pot (obtain overlay film backing material inner layer resin film and
Outermost resin film is phenolic resin film).
Comparative example 3
The difference of this comparative example and embodiment 1, which is only that, is added without ethylenediamine (amines additives).
Comparative example 4
The difference of this comparative example and embodiment 1, which is only that, is added without drag reducer.
Comparative example 5
The difference of this comparative example and embodiment 1 is only that the mass fraction of drag reducer is 0.5.
Comparative example 6
The difference of this comparative example and embodiment 1 is only that the mass fraction of drag reducer is 2.5.
Comparative example 7
It buys from the ceramsite propping agent of 20/40 specification of Luoyang Zhong Tai Industrial Co., Ltd. and is tested for the property.
Comparative example 8
The difference of this comparative example and embodiment 1 is only that the mass fraction of toluene di-isocyanate(TDI) is 0.7 part.
Comparative example 9
The difference of this comparative example and embodiment 4 is only that the mass fraction of methylenediphenyl diisocyanates is 3.6 parts.
Raw material parts is mass fraction in above embodiments and comparative example.
The main performance index and measuring method of above-mentioned overlay film backing material:
Examination criteria: molten about apparent density, bulk density, circle/sphericity, percentage of damage and acid in above-described embodiment and comparative example
The test of Xie Du is carried out according to " SY/T5108-2014 hydraulic fracturing and gravel packing operations proppant performance test methods "
Test.
The overlay film backing material of above-described embodiment and comparative example is done to the survey of mattress height, suspend ratio and suspension time simultaneously
Examination.
1. suspension ratio
It suspends than being that suspension amount in upper layer accounts for the percentage of total overlay film backing material to evaluation overlay film backing material in water.
We use the mass ratio of overlay film backing material and water to evaluate for the case where 1:4 in test.Experimental method is
In the wide-mouth bottle of 300ml, 200ml water is measured with graduated cylinder and is poured into wide-mouth bottle, precise 50g overlay film backing material pours into dress
In the wide-mouth bottle of water, close the lid, firmly shake up and down for 30 times, it is static after ten minutes, exert oneself up and down after the same method
It shakes 30 times, filters out the overlay film backing material of upper layer suspension after static with filter paper, the overlay film branch filtered out is weighed after drying
The quality of timbering material is m (g), and b=m/50*100% is compared in suspension.
2. mattress height
Mattress height is lower layer height of the 20g overlay film backing material in the 100ml graduated cylinder equipped with 100ml clear water.
Since laboratory can only do static suspension test, so the mattress height of lower layer is also evaluate suspendability one
Item important indicator.
The amount of plastic wound packages 100ml water of 100ml is used in experiment, precise 20g overlay film backing material, which pours into, has filled water
In graduated cylinder, tightly cover graduated cylinder mouth with the right hand, left hand is picked up graduated cylinder and is gently reversed 10 times up and down, it is static after ten minutes, according to same
Method up and down reverse 10 times, there is vernier caliper to measure the bed height of lower layer's overlay film backing material after static.
3. suspension time
Suspension time refers to the maximum duration that can freely suspend in water.
We use the mass ratio of overlay film backing material and water to evaluate for the case where 1:4 in test.Experimental method is
In the wide-mouth bottle of 300ml, 200ml water is measured with graduated cylinder and is poured into wide-mouth bottle, precise 50g overlay film backing material pours into dress
In the wide-mouth bottle of water, close the lid, firmly shake up and down for 30 times, it is static after ten minutes, exert oneself up and down after the same method
It shakes 30 times, the maximum duration that then the static placement of wide-mouth bottle, timing measuring overlay film backing material freely suspend in water.
Embodiment 1- embodiment 4, the Example Test Data of comparative example 1- comparative example 9 are as follows:
" certainly outstanding composite index " is the overall target for evaluating overlay film backing material suspendability in clear water in upper table, by sinking
Bed height and the ratio that suspends codetermine, and engineering significance is practical bulk density of the overlay film backing material in clear water, and value is got over
The small relative density being equivalent in water is with regard to smaller, then the suspension of overlay film backing material is better, suspension time is longer.
Embodiment 1 and comparative example 1 are compared, embodiment 2 and comparative example 2 compare, and wherein embodiment 1 and embodiment 2 is outer
Layer resin film is urethane resin film, and the outermost resin film of comparative example 1 and comparative example 2 is not urethane resin film, root
According to upper table, can release, the suspension time of embodiment 1 and embodiment 2 is respectively higher than the suspension time of comparative example 1 and comparative example 2,
The certainly outstanding composite index of embodiment 1 and embodiment 2 is respectively smaller than comparative example 1 and comparative example 2, that is, embodiment 1 and 1 phase of comparative example
More preferable than from suspendability, embodiment 2 is more preferable from suspendability compared with comparative example 2, it can be seen that, urethane resin film can
Improve overlay film backing material from suspendability, it is specific for during the preparation process, polyurethane resin film surface can generate several
Protrusion, isocyanates root (Isocyanates curing agent offer) remaining in urethane resin film can also occur anti-with water when meeting water
Bubble should be generated, so improve covering material from suspendability.
According to upper table, compared with comparative example 7, suspension time and the ratio that suspends are significantly increased embodiment 1, from outstanding composite index
It is substantially reduced, i.e., this programme greatly improves for conventional proppants from suspendability.
Embodiment 1 is only in outermost resin film compared with comparative example 3 containing ethylenediamine (amines additives), according to upper table,
Concluding that overlay film backing material is compared with comparative example 3 made from embodiment 1, suspension time and the ratio that suspends are significantly increased, from
Outstanding composite index is substantially reduced, i.e. overlay film backing material is significantly improved from suspendability, illustrates overlay film branch made from embodiment 1
Supportting material surface has more protrusions, and can release amines additives has the formation of overlay film backing material surface bulge
Preferable facilitation makes greatly improving from suspendability for overlay film backing material by amines additives.
Embodiment 1 and comparative example 4 are compared, it was therefore concluded that: after being added to drag reducer from suspension covering material
Drag reducing efficiency is substantially better than the drag reducing efficiency from suspension covering material for being not added with drag reducer, can be substantially reduced by adding drag reducer
From the frictional resistance of suspension covering material, its guide performance is promoted
Embodiment 1 and comparative example 5 are compared, it was therefore concluded that: the overlay film branch when the mass fraction of drag reducer is less than 0.8
The drag reducing efficiency of timbering material substantially reduces, and corresponding technique requirement is not achieved.
Embodiment 1 and comparative example 6 are compared, it was therefore concluded that: when the mass fraction of drag reducer is greater than 2, overlay film is supported
The resistant to breakage of material, which is filtered, and acid is molten is all increased, and reduces the performance of overlay film backing material product, while suspension can also be deteriorated,
Reduce overlay film backing material from suspendability.
Comparative example 8 is distinguished compared with Example 1 is that the mass fraction of toluene di-isocyanate(TDI) is 0.7 part, in comparative example 8
Toluene di-isocyanate(TDI) (isocyanates) and the quality accounting of glycerine polymer (polyalcohols resin) areThe quality accounting of isocyanates and polyalcohols resin in embodiment 1 is
The quality of isocyanates is less than the 40% of polyalcohols resin quality i.e. in comparative example 8, according to upper table, it can be deduced that comparative example 8
The suspension time of backing material and suspension are decreased obviously than, are significantly improved from outstanding composite index, i.e., comparative example 8 compares embodiment
It is substantially reduced for 1 from suspendability, when illustrating that the quality of isocyanates is less than the 40% of polyalcohols resin quality, fid
Material is substantially reduced from suspendability.
Comparative example 9 is distinguished compared with Example 4 is that the mass fraction of toluene di-isocyanate(TDI) is 3.6 parts, in comparative example 9
Methylenediphenyl diisocyanates (isocyanates) and the quality accounting of glycerine polymer (polyalcohols resin) areThe quality accounting of isocyanates and polyalcohols resin in embodiment 4 is
The quality of isocyanates is greater than the 80% of polyalcohols resin quality i.e. in comparative example 9, according to upper table, it can be deduced that comparative example 9
The suspension time of backing material and suspension are decreased obviously than, are significantly improved from outstanding composite index, i.e., comparative example 9 compares embodiment
It is substantially reduced for 4 from suspendability, when illustrating that the quality of isocyanates is greater than the 80% of polyalcohols resin quality, fid
Material is substantially reduced from suspendability.
To sum up, the quality of isocyanates is controlled in the range of polyalcohols resin quality 40%-80% in this programme
When, overlay film backing material all has preferably from suspendability, meets overlay film backing material in clear water from the requirement to suspend.And
When the quality of isocyanates is lower than polyalcohols resin quality less than 40% or greater than 80%, overlay film backing material suspends certainly
Performance is decreased obviously, it is difficult to meet the requirement to suspend in clear water.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (10)
1. a kind of overlay film backing material, including aggregate and the coat being coated on aggregate, it is characterised in that: the coat packet
Inner layer resin film and outermost resin film are included, drag reducer is added between the outermost resin film and inner layer resin film, by mass
The drag reducer is the 0.8-2% of aggregate, and the outermost resin film includes amines additives, and the view of the overlay film backing material is close
Degree is 1.05-2.60g/cm3。
2. a kind of overlay film backing material according to claim 1, it is characterised in that: the drag reducer preparation step is as follows,
The water of 85-93%, the acrylamide and acrylamide derivative of 5-10%, the acrylic acid of 0.5-2% are added as mass fraction
And methacrylic acid, the 2- acrylamide-2-methyl propane sulfonic of 1-5% and the methylpropene sodium sulfonate of 0.5-3%, stir 150-
220rpm, and it is warming up to 40-70 DEG C, the initiator of above-mentioned gross mass 0.3-2% is added, is reacted through 3-40min, is down to room temperature.
3. a kind of overlay film backing material according to claim 1, it is characterised in that: the outermost resin film is polyurethane tree
Adipose membrane, the inner layer resin film are the one or more of urethane resin film, epoxy resin film and phenolic resin film.
4. a kind of overlay film backing material according to claim 1, it is characterised in that: the amines additives are divinyl three
One or more of amine, triethylamine, ethamine, diethylamine, triethylene tetramine.
5. a kind of overlay film backing material according to claim 2, it is characterised in that: the initiator is azo diisobutyl
Amidine hydrochloride, two isobutyl imidazoline hydrochloride of azo, azo dicyano valeric acid, azo dicyclohexyl formonitrile HCN one or two
More than.
6. a kind of overlay film backing material according to claim 1, it is characterised in that: the overlay film backing material includes following
The material of mass fraction, 100 parts of aggregate, 0.25-5 parts of inner layer resin film, 0.25-5 parts of outermost resin film, the amines additives
Quality is the 1/100-20/100 of outermost resin film quality.
7. a kind of overlay film backing material according to claim 1, it is characterised in that: the outermost resin film is by polyalcohols
Resin, catalyst and Isocyanates curing agent are made, and the equivalent of polyalcohols resin hydroxyl is 60-300, and isocyanates is solid
Agent quality is the 40-80% of polyalcohols resin quality in outermost resin film, and catalyst quality is polynary in outermost resin film
The 1/1000-1/100 of alcohols resin quality.
8. a kind of overlay film backing material according to claim 7, it is characterised in that: the catalyst is alkyls tin chemical combination
The mixture of one or more of object and/or alkyls lead compound.
9. a kind of overlay film backing material according to claim 8, it is characterised in that: alkyls tin compound is tin dilaurate
One of dibutyl tin, tributyl tin or several mixtures, alkyls lead compound are lead tetraethide, in isooctyl acid lead
One or several kinds of mixtures.
10. a kind of overlay film backing material according to claim 8, it is characterised in that: Isocyanates curing agent is toluene
Diisocyanate, methylenediphenyl diisocyanates, isophorone diisocyanate, in methyl diphenylene diisocyanate
It is one or more kinds of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811161979.5A CN109181676A (en) | 2018-09-30 | 2018-09-30 | A kind of overlay film backing material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811161979.5A CN109181676A (en) | 2018-09-30 | 2018-09-30 | A kind of overlay film backing material |
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