CN105924104B - A kind of expanded perlite thermal-nsulation plate and its production method - Google Patents
A kind of expanded perlite thermal-nsulation plate and its production method Download PDFInfo
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- CN105924104B CN105924104B CN201610280653.9A CN201610280653A CN105924104B CN 105924104 B CN105924104 B CN 105924104B CN 201610280653 A CN201610280653 A CN 201610280653A CN 105924104 B CN105924104 B CN 105924104B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of expanded perlite thermal-nsulation plate and its production method, the expanded perlite thermal-nsulation plate includes the component of following parts by weight meter：10 20 parts of 18 25 parts of cement, 58 parts of flyash, 25 parts of methyltrimethoxysilane, 5 10 parts of polyacrylate dispersion, 50 70 parts of expanded perlite, 0.7 2.9 parts of neopelex, 5 10 parts of additive and water.Expanded perlite thermal-nsulation plate of the present invention is effectively utilized industrial and mineral dead meal, and without addition poisonous and harmful substance using cement, flyash and other organic and inorganic objects as raw material, environmentally protective.The experimental results showed that the dry density of expanded perlite thermal-nsulation plate of the present invention is less than 190kg/m3Compression strength is more than 0.6MPa, thermal conductivity factor is less than 0.053W/ (m.k), and flexural strength is more than 0.5MPa, and mass water content is less than 4.5%, it is more than 0.25MPa perpendicular to board direction tensile strength, volume water absorption rate is less than 8.8%, and coefficient of softing is more than 0.88, and mass loss rate is less than 4.0%, compression strength loss rate is less than 23%, and hydrophobic rate is more than 96%.
Description
Technical field
The present invention relates to a kind of expanded perlite thermal-nsulation plate and its production methods, belong to building material technical field.
Background technology
Building energy conservation is the industry that national industrial policies are given special assistance to.At present, energy-saving building materials are broadly divided into inorganic guarantor
Warm lightweight aggregate and the light bone material of organic heat-insulating, but the characteristics of due to materials chemistry property, whether inorganic system or organic
System can not all take into account the requirement of properties of heat preservation and energy saving and security against fire simultaneously：For heat-insulating property, organic material is better than nothing
Machine material；Consider from Performance-based fire, A grades of anti-flammability thermal insulation materials are only selection again.In recent years, inorganic heat insulation material
For middle expanded perlite with its excellent fire retardancy energy, the advantages such as environmentally safe are just gradually becoming the head of inorganic external wall thermal-insulation material
Choosing.
Expanded perlite as a kind of nonmetallic mineral material, be widely used in building, metallurgy, oil, chemical industry, light industry,
The fields such as electric power, transport and agricultural.1.27 hundred million tons of District, Xinyang Area, Henan Province spinal cord perlite mineral reserve proved reserves occupy " Asia first, generation
Boundary the second " accounts for more than the 70% of China's perlite commercial reserves.In building trade, the spherical shape studied by Xinyang Normal College is closed
After hole perlite realizes industrialization, expanded perlite is just widely used in the light bone material of external wall insulation.But due to each
Kind reason, the application of expanded perlite thermal-nsulation plate also suffer from some limitations.
Invention content
The technical problems to be solved by the invention are to provide a kind of expanded perlite thermal-nsulation plate and its production method, the expansion
Pearlite heat-insulation plate is with fire protecting performance is superior, light, intensity is high, thermal conductivity factor is low, water absorption rate is low, flexibility is good, application property
Can be good the features such as.
To achieve these goals, the technical solution adopted in the present invention is to provide a kind of expanded perlite thermal-nsulation plate, packet
Include the component of following parts by weight meter：18-25 parts of cement, 5-8 parts of flyash, 2-5 parts of methyltrimethoxysilane, polyacrylate
5-10 parts of lotion, 50-70 parts of expanded perlite, 0.7-2.9 parts of neopelex, 5-10 parts of additive and water 10-20
Part.
The model PO52.5 of the cement.
The fineness of the flyash be 12% (R45), loss on ignition 5%, sulfur trioxide content 3%.
The rate of closed hole of the expanded perlite is 70-75%, bulk density 80-90kg/m3, cross 20-30 mesh sieve.
The additive includes the component of following parts by weight meter：25-35 parts of calcium sulfate, 2-5 parts of aluminium oxide, carboxymethyl are fine
15-20 parts of plain 0.2-5 parts of the sodium of dimension, 5-10 parts of trbasic zinc phosphate and iron oxide.Preferably, the additive includes following parts by weight meter
Component：20 parts of 30 parts of calcium sulfate, 3 parts of aluminium oxide, 3 parts of sodium carboxymethylcellulose, 5 parts of trbasic zinc phosphate and iron oxide.
The technical solution adopted in the present invention, which also resides in, provides a kind of production method of expanded perlite thermal-nsulation plate, including with
Lower step：
(1) flyash, additive and polyacrylate dispersion are mixed and stirred for uniformly, adding cement and dodecyl
Benzene sulfonic acid sodium salt continues to stir, and obtains rubber powder material；
(2) expanded perlite and rubber powder material are mixed, add methyltrimethoxysilane and water, stir evenly,
Continuous mould pressing is molded, and obtains half-dried expanded perlite thermal-nsulation plate；
(3) half-dried expanded perlite thermal-nsulation plate is subjected to heating curing；
(4) after heating curing, start drying, drying to expanded perlite thermal-nsulation plate water content is less than 5%, you can goes out
Kiln.
Equipment used in continuous mould pressing molding is hydraulic press in step (2), and the pressure of hydraulic press is 50t.
Heat-cured temperature is 50-75 DEG C in step (3), time 12-20h.
The conventional method of this field can be used in the heating curing of expanded perlite thermal-nsulation plate.The present invention is by half-dried expansion
Pearlite heat-insulation plate is sent into tunnel oven, closure of a tunnel kiln wicket, opens biomass particle burning machine and air-heater to half-dried
Expanded perlite thermal-nsulation plate carries out heating curing.
Dry temperature is 90-120 DEG C in step (4).
Advantageous effect
1st, fire protecting performance is superior.Expanded perlite thermal-nsulation plate of the present invention mainly uses inorganic incombustible material, Neng Gouyou
Effect improves the fire protecting performance of thermal insulation board, and the combustibility of expanded perlite thermal-nsulation plate of the present invention is up to A1 grades.
2nd, it is light, intensity is high, thermal conductivity factor is low.The present invention is using high-mark cement as expanded perlite thermal-nsulation plank
Major gelled material, while outer fly ash, neopelex, additive improve the intensity of cementitious material, make heat preservation
Material ensureing resistance to compression, substantially reducing dry density on the basis of flexural strength, and plank is made to have higher intensity and relatively low lead
Hot coefficient, so as to ensure that heat preservation plate material and system have good heat-insulating property.
3rd, it is good with the adhesive layer of heat-insulation system and cracking resistance protective layer compatibility.Due to the expanded perlite thermal-nsulation plate of the present invention
Using high-mark cement as major gelled material, added not using sodium silicate and containing sodium silicate or containing chlorion cement
Agent ensures that expanded perlite thermal-nsulation plank and heat-insulation system are not in the problems such as accumulation of salt in the surface soil returns chlorine, while the present invention from root
The thermal insulation board bonding mortar, the anticracking grout ingredient that are used to heat-insulation system it is substantially similar, ensure that system compatibility is good, will not
Phenomena such as hollowing cracking occurs, can be with the building same service life.
4th, flexibility is good, backfin ratio is reasonable, has good workability.Expanded perlite thermal-nsulation plate of the present invention is molded using half siccative
Technology and using the preferable polyacrylate dispersion of flexibility as cementitious material additive, and thermal insulation board material is from expanded pearlite
Rock is fabricated into plate moulding molding, and all using automated production, product flexibility is good, backfin ratio is reasonable, has good workability, matter
Amount is stablized, and reduces the breakage rate of expanded perlite thermal-nsulation plate in work progress.
5th, water absorption rate is low.The present invention adds in methyltrimethoxysilane work by selecting the expanded perlite of high-quality
For hydrophober, while optimize the proportionate relationship of each component, the water absorption rate of expanded perlite thermal-nsulation plate can be reduced, extend and use the longevity
Life.
6th, it is environmentally protective.Expanded perlite thermal-nsulation plate of the present invention is using cement, flyash and other organic and inorganic objects as original
Material is effectively utilized industrial and mineral dead meal, and without addition poisonous and harmful substance, environmentally protective.
7th, the heating curing temperature and time of the invention by controlling half-dried expanded perlite thermal-nsulation plate, controls dry temperature
Degree can further improve the properties of thermal insulation board.
8th, the experimental results showed that, the dry density of expanded perlite thermal-nsulation plate of the present invention is less than 190kg/m3, compression strength is big
In 0.6MPa, thermal conductivity factor is less than 0.053W/ (m.k), and flexural strength is more than 0.5MPa, and mass water content is less than 4.5%, vertically
It is more than 0.25MPa in board direction tensile strength, volume water absorption rate is less than 8.8%, and coefficient of softing is more than 0.88, mass loss rate
Less than 4.0%, compression strength loss rate is less than 23%, and hydrophobic rate is more than 96%.
9th, the raw material sources of expanded perlite thermal-nsulation plate of the present invention are extensive, at low cost, simple production process, easily operated,
It disclosure satisfy that the demand of different construction materials, there is good social and economic benefit.
Specific embodiment
The specific embodiment of the present invention is described in further detail with reference to embodiments.
The requirement of raw material used in the present invention is：
The model PO52.5 of cement.
The fineness of flyash be 12% (R45), loss on ignition 5%, sulfur trioxide content 3%.
The rate of closed hole of expanded perlite is 70-75%, bulk density 80-90kg/m3, cross 20-30 mesh sieve.
Polyacrylate dispersion is purchased from Taiyuan City Jinyuan District Jin Yuan Building Materials Factories.
Embodiment 1
The expanded perlite thermal-nsulation plate of the present embodiment includes the component of following parts by weight meter：20 parts of cement, 5 parts of flyash,
5 parts of methyltrimethoxysilane, 50 parts of expanded perlite, 2 parts of neopelex, adds 10 parts of polyacrylate dispersion
Add 10 parts of 8 parts of agent and water.
The additive includes the component of following parts by weight meter：35 parts of calcium sulfate, 5 parts of aluminium oxide, carboxymethyl cellulose
15 parts of 5 parts of sodium, 10 parts of trbasic zinc phosphate and iron oxide.
The production method of the expanded perlite thermal-nsulation plate of the present embodiment, includes the following steps：
(1) flyash, additive and polyacrylate dispersion addition forced stirrer are mixed and stirred for 15min, then add
Enter cement and neopelex continues to stir 30min, obtain rubber powder material；
(2) expanded perlite and rubber powder material are mixed, add methyltrimethoxysilane and water, stir evenly,
It send to hydraulic press continuous mould pressing and is molded, obtain half-dried expanded perlite thermal-nsulation plate；Hydraulic press pressure is 50t；
(3) half-dried expanded perlite thermal-nsulation plate is subjected to heating curing, heat-cured temperature is 60 DEG C, and the time is
12h；
(4) after heating curing, start drying, drying temperature is 90 DEG C, until expanded perlite thermal-nsulation plate water content
Less than 5%, you can kiln discharge.
Embodiment 2
The expanded perlite thermal-nsulation plate of the present embodiment includes the component of following parts by weight meter：18 parts of cement, 8 parts of flyash,
2 parts of methyltrimethoxysilane, 60 parts of expanded perlite, 0.7 part of neopelex, adds 5 parts of polyacrylate dispersion
Add 15 parts of 5 parts of agent and water.
The additive includes the component of following parts by weight meter：25 parts of calcium sulfate, 2 parts of aluminium oxide, carboxymethyl cellulose
18 parts of 0.2 part of sodium, 8 parts of trbasic zinc phosphate and iron oxide.
The production method of the expanded perlite thermal-nsulation plate of the present embodiment, includes the following steps：
(1) flyash, additive and polyacrylate dispersion addition forced stirrer are mixed and stirred for 10min, then add
Enter cement and neopelex continues to stir 20min, obtain rubber powder material；
(2) expanded perlite and rubber powder material are mixed, add methyltrimethoxysilane and water, stir evenly,
It send to hydraulic press continuous mould pressing and is molded, obtain half-dried expanded perlite thermal-nsulation plate；Hydraulic press pressure is 50t；
(3) half-dried expanded perlite thermal-nsulation plate is subjected to heating curing, heat-cured temperature is 75 DEG C, and the time is
16h；
(4) after heating curing, start drying, drying temperature is 100 DEG C, until expanded perlite thermal-nsulation plate water content
Less than 5%, you can kiln discharge.
Embodiment 3
The expanded perlite thermal-nsulation plate of the present embodiment includes the component of following parts by weight meter：25 parts of cement, 6 parts of flyash,
4 parts of methyltrimethoxysilane, 70 parts of expanded perlite, 2.9 parts of neopelex, adds 8 parts of polyacrylate dispersion
Add 20 parts of 10 parts of agent and water.
The additive includes the component of following parts by weight meter：30 parts of calcium sulfate, 3 parts of aluminium oxide, carboxymethyl cellulose
20 parts of 3 parts of sodium, 5 parts of trbasic zinc phosphate and iron oxide.
The production method of the expanded perlite thermal-nsulation plate of the present embodiment, includes the following steps：
(1) flyash, additive and polyacrylate dispersion addition forced stirrer are mixed and stirred for 20min, then add
Enter cement and neopelex continues to stir 40min, obtain rubber powder material；
(2) expanded perlite and rubber powder material are mixed, add methyltrimethoxysilane and water, stir evenly,
It send to hydraulic press continuous mould pressing and is molded, obtain half-dried expanded perlite thermal-nsulation plate；Hydraulic press pressure is 50t；
(3) half-dried expanded perlite thermal-nsulation plate is subjected to heating curing, heat-cured temperature is 50 DEG C, and the time is
20h；
(4) after heating curing, start drying, drying temperature is 120 DEG C, until expanded perlite thermal-nsulation plate water content
Less than 5%, you can kiln discharge.
Experimental example one
Using the expanded perlite thermal-nsulation plate of embodiment 1 as experiment material, verify different curing conditions and time to expansion
The intensity effect of pearlite heat-insulation plate, the results are shown in Table 1.
The influence of 1 curing condition of table and time to thermal insulation board intensity
| 60 DEG C of heating curings | Room temperature natural curing | Compression strength | Flexural strength |
| 8h | 0 | 0.505MPa | 0.468MPa |
| 12h | 0 | 0.611MPa | 0.513MPa |
| 16h | 0 | 0.621MPa | 0.521MPa |
| 20h | 0 | 0.625MPa | 0.529MPa |
| 0 | 7d | 0.448MPa | 0.218MPa |
| 0 | 9d | 0.457MPa | 0.234MPa |
| 0 | 11d | 0.498MPa | 0.299MPa |
| 0 | 13d | 0.515MPa | 0.315MPa |
| 0 | 15d | 0.552MPa | 0.451MPa |
| 0 | 17d | 0.573MPa | 0.501MPa |
| 0 | 21d | 0.609MPa | 0.515MPa |
Experimental example two
Using the expanded perlite thermal-nsulation plate of the present invention as experimental group, and use commercially available expanded perlite thermal-nsulation plate conduct
Control detects property indices, the results are shown in Table 2.
The property indices of 2 expanded perlite thermal-nsulation plate of the present invention of table
Claims (9)
1. a kind of expanded perlite thermal-nsulation plate, which is characterized in that include the component of following parts by weight meter：18-25 parts of cement, fine coal
5-8 parts grey, 2-5 parts of methyltrimethoxysilane, 5-10 parts of polyacrylate dispersion, 50-70 parts of expanded perlite, dodecyl
10-20 parts of 0.7-2.9 parts of benzene sulfonic acid sodium salt, 5-10 parts of additive and water；
The additive includes the component of following parts by weight meter：25-35 parts of calcium sulfate, 2-5 parts of aluminium oxide, carboxymethyl cellulose
15-20 parts of 0.2-5 parts of sodium, 5-10 parts of trbasic zinc phosphate and iron oxide.
2. expanded perlite thermal-nsulation plate according to claim 1, which is characterized in that the model of the cement
PO52.5。
3. expanded perlite thermal-nsulation plate according to claim 1, which is characterized in that the fineness of the flyash is 12%
R45, loss on ignition 5%, sulfur trioxide content 3%.
4. expanded perlite thermal-nsulation plate according to claim 1, which is characterized in that the rate of closed hole of the expanded perlite
For 70-75%, bulk density 80-90kg/m3, cross 20-30 mesh sieve.
5. expanded perlite thermal-nsulation plate according to claim 1, which is characterized in that the additive includes following weight
The component of part meter：20 parts of 30 parts of calcium sulfate, 3 parts of aluminium oxide, 3 parts of sodium carboxymethylcellulose, 5 parts of trbasic zinc phosphate and iron oxide.
It is 6. a kind of such as the production method of claim 1-5 any one of them expanded perlite thermal-nsulation plates, which is characterized in that including
Following steps：
(1) flyash, additive and polyacrylate dispersion are mixed and stirred for uniformly, adding cement and detergent alkylate
Sodium sulfonate continues to stir, and obtains rubber powder material；
(2) expanded perlite and rubber powder material are mixed, add methyltrimethoxysilane and water, stir evenly, even
Continuous compression molding, obtains half-dried expanded perlite thermal-nsulation plate；
(3) half-dried expanded perlite thermal-nsulation plate is subjected to heating curing；
(4) after heating curing, start drying, drying to expanded perlite thermal-nsulation plate water content is less than 5%, you can goes out
Kiln.
7. the production method of expanded perlite thermal-nsulation plate according to claim 6, which is characterized in that step connects in (2)
Equipment used in continuous compression molding is hydraulic press, and the pressure of hydraulic press is 50t.
8. the production method of expanded perlite thermal-nsulation plate according to claim 6, which is characterized in that add in step (3)
The temperature of thermal curing is 50-75 DEG C, time 12-20h.
9. the production method of expanded perlite thermal-nsulation plate according to claim 6, which is characterized in that done in step (4)
Dry temperature is 90-120 DEG C.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603263A (en) * | 2012-02-28 | 2012-07-25 | 葛兆明 | Composite fireproof thermal-insulation board for fire barrier of external thermal insulation system for outer wall and preparation method of the board |
| CN102815906A (en) * | 2012-09-07 | 2012-12-12 | 宁波荣山新型材料有限公司 | Dual organic modified cement-base expanded perlite fireproof thermal-insulation board and preparation method thereof |
| CN104496246A (en) * | 2014-12-24 | 2015-04-08 | 熊敏 | Cement concrete building solid phase filler surfactant and manufacturing and use methods thereof |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603263A (en) * | 2012-02-28 | 2012-07-25 | 葛兆明 | Composite fireproof thermal-insulation board for fire barrier of external thermal insulation system for outer wall and preparation method of the board |
| CN102815906A (en) * | 2012-09-07 | 2012-12-12 | 宁波荣山新型材料有限公司 | Dual organic modified cement-base expanded perlite fireproof thermal-insulation board and preparation method thereof |
| CN104496246A (en) * | 2014-12-24 | 2015-04-08 | 熊敏 | Cement concrete building solid phase filler surfactant and manufacturing and use methods thereof |
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