CN114603862B - Novel composite concave reducing sheet for bulletproof plugboard and preparation method thereof - Google Patents
Novel composite concave reducing sheet for bulletproof plugboard and preparation method thereof Download PDFInfo
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- CN114603862B CN114603862B CN202210141347.2A CN202210141347A CN114603862B CN 114603862 B CN114603862 B CN 114603862B CN 202210141347 A CN202210141347 A CN 202210141347A CN 114603862 B CN114603862 B CN 114603862B
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- 239000002131 composite material Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 230000001603 reducing effect Effects 0.000 title description 10
- 239000006260 foam Substances 0.000 claims abstract description 46
- 239000000956 alloy Substances 0.000 claims abstract description 31
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 31
- 229920003023 plastic Polymers 0.000 claims abstract description 31
- 239000004033 plastic Substances 0.000 claims abstract description 31
- 238000013329 compounding Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 16
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 239000004831 Hot glue Substances 0.000 claims abstract description 13
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 10
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 229920005594 polymer fiber Polymers 0.000 abstract 2
- 239000004698 Polyethylene Substances 0.000 description 29
- -1 polyethylene Polymers 0.000 description 17
- 229920000573 polyethylene Polymers 0.000 description 17
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 239000006261 foam material Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000004760 aramid Substances 0.000 description 4
- 229920003235 aromatic polyamide Polymers 0.000 description 4
- 238000011074 autoclave method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 238000007665 sagging Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/81455—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The invention discloses a novel composite concave-reducing sheet for a bulletproof plugboard and a preparation method thereof, and the preparation method comprises the following specific steps: step one, preparing materials; cutting a polymer fiber net, plastic alloy microporous foam, a semi-solidified hot melt adhesive film (EPT I type film) and a release film into required sizes; step two, stacking materials; stacking the isolation plate, the release film, the polymer fiber net, the semi-solidified hot melt adhesive film, the plastic alloy sub-microporous foam, the release film and the isolation plate in sequence to be used as an independent unit; step three, compression compounding; compressing and compounding the independent units in the second step, and controlling the compression ratio of the plastic alloy sub-microporous foam to be 12% -18% to form a composite concave-reducing sheet preliminary model; step four, finishing and cutting; separating the release film on the primary model of the composite concave-reducing sheet after compression and compounding in the third step, cutting and arranging according to the required size, and preparing the novel composite concave-reducing sheet for the bulletproof plugboard. Has the characteristics of high energy absorption, light weight, weather resistance and the like.
Description
Technical Field
The invention relates to the technical field of novel bulletproof, in particular to a novel composite concave-reducing sheet for a bulletproof plugboard and a preparation method thereof.
Background
The prior bulletproof plugboard mainly realizes the reduction of the dent by increasing the thickness of bulletproof main materials such as ceramics, bulletproof UD cloth and the like or adding common foam and foam materials on the back surface of the plugboard. The former tends to increase the weight of the bulletproof plugboard greatly, while the latter increases the thickness of the bulletproof plugboard greatly, and the ideal effect is not achieved; both of these individual pieces of equipment are unacceptable, with specific limitations on weight and thickness in a specific bid. The common foam is usually made of EVA, polyurethane, rubber and other materials, and the materials only have submillimeter-level cells, so that the effects of absorbing energy and reducing dent are poor when the materials are hit by bullets, and the materials are poor in weather resistance and not environment-friendly.
The dishing caused by M80 bullets to the bulletproof plugboard is the largest in all bullets, and the problem of large dishing is difficult to solve by the conventional structure and dishing-reducing materials, so that a novel material is urgently needed for national defense and security protection to solve the problem.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a novel composite concave-reducing sheet for a bulletproof plugboard and a preparation method thereof, wherein the composite concave-reducing sheet is formed by compositing plastic alloy submicron foam and ultra-high-strength polyethylene fiber net, and the composite material has the characteristics of high energy absorption, light weight, weather resistance and the like.
The technical scheme of the invention is as follows: the preparation method of the novel composite concave-reducing sheet for the bulletproof plugboard comprises the following specific steps:
step one, preparing materials;
cutting a high molecular weight polyethylene fiber net (PE fiber net), plastic alloy submicron foam, a semi-solidified hot melt adhesive film (EPT I type film) and a release film into required sizes;
step two, stacking materials;
stacking a separator, a release film, a high molecular weight polyethylene fiber web, a semi-solidified hot melt adhesive film, plastic alloy sub-microporous foam, the release film and the separator in sequence to form an independent unit;
step three, compression compounding;
compressing and compounding the independent units in the second step, and controlling the compression ratio of the plastic alloy sub-microporous foam to be 12% -18% to form a composite concave-reducing sheet preliminary model;
step four, finishing and cutting;
separating the release film on the primary model of the composite concave-reducing sheet after compression and compounding in the third step, cutting and arranging according to the required size, and preparing the novel composite concave-reducing sheet for the bulletproof plugboard.
Further, stacking materials;
the separator, the release film, the high molecular weight polyethylene fiber web, the semi-solidified hot melt adhesive film, the plastic alloy sub-microporous foam, the semi-solidified hot melt adhesive film, the high molecular weight polyethylene fiber web, the release film and the separator are stacked in sequence to be used as an independent unit.
Further, the compression compounding in the third step is specifically as follows:
vacuumizing: stacking the single independent units or multiple independent units prepared in the second step, sleeving the independent units into a vacuum bag, putting the vacuum bag into an autoclave, connecting a vacuum pump for vacuumizing, and keeping the vacuum bag;
compounding in an autoclave: pressurizing the cabin door of the closed autoclave to 1.0-1.3 MPa, starting heating, and keeping the temperature for 8-12 minutes when the temperature reaches 90-110 ℃; heating to 125-130 deg.c for 55-65min; cooling to below 80deg.C, relieving pressure, and taking out the part.
Further, autoclave compounding: pressurizing the cabin door of the closed autoclave to 1.0-1.3 MPa, starting heating, and keeping for 10 minutes when the temperature reaches 100 ℃; heating to 128 deg.C, and maintaining for 60min; cooling to below 80deg.C, relieving pressure, and taking out the part.
Further, the compression compounding in the third step is specifically as follows:
and (3) placing a composite board: placing single independent units or multiple groups of independent units into upper and lower flat pressing dies of a hot press after stacking, and keeping the upper and lower units stacked neatly without dislocation;
compounding by a press: the pressure of the press is set at 1.2-1.4MPa, the upper and lower flat plates are molded, and the upper and lower flat plates are heated to 90-110 ℃ and kept for 8-12 minutes; heating to 125-135 deg.c for 55-65min; cooling to below 80deg.C, relieving pressure, and taking out the part.
Further, press compounding: the pressure of the press is set at 1.3MPa, the upper and lower flat plates are molded, and the upper and lower flat plates are heated to 100 ℃ and kept for 10 minutes; heating to 130 ℃ again, and keeping for 60min; cooling to below 80deg.C, relieving pressure, and taking out the part.
Further, the control method of the thickness of the plastic alloy microporous foam in the third step is as follows: and a height limiting strip is added between two isolation plates of each independent unit, the height limiting strip is placed at the outermost side of the isolation plate, and the height limiting strip is fixed with the lower isolation plate by adopting double-sided countersunk rivets.
Further, each independent unit is provided with 4 height limiting strips.
Further, the plastic alloy submicron foam is SMHP plastic alloy submicron foam.
The invention provides a novel composite concave-reducing sheet for bulletproof plugboards, which is prepared by the preparation method of the novel composite concave-reducing sheet for bulletproof plugboards.
Principle of concave reduction of composite bulletproof concave reduction sheet:
(1) energy absorption: the plastic alloy submicron foam has a large number of submicron-level closed foaming holes, and the strength of a hole wall film is greatly improved after nano modification; after the high-strength polyethylene fiber net and the foam are compounded, when being impacted, a large number of cells are broken and exploded, most of impact energy from bullets is absorbed in the process, and the back bulge value of the bulletproof back plate (PE, aramid back plate and the like) can be greatly reduced;
(2) reducing pressure: after the polyethylene net and the foam are compounded, the tensile strength is greatly provided, and the hardness and the bending strength are also provided to a certain extent, so that the anti-sagging polyethylene net is very beneficial to the anti-sagging of the bulletproof plate; after the concave reducing sheet is impacted by a bullet, the pressure of local points is diffused to the periphery, the contact area of the material and the daub is increased, and the local impact pressure is reduced, so that the back bulge of the bulletproof back plate (PE, aramid back plate and the like) is reduced;
(3) borrow space: the composite concave-reducing sheet has a certain thickness space, the impact is instantaneously and partially collapsed and destroyed, the thickness space of other parts is complete, and the bulletproof backboard is reduced by a certain amount by the complete thickness.
The beneficial effects of the invention are as follows: composite bulletproof concave-reducing sheet structure (polyethylene net forms composite material with plastic alloy sub-microporous foam through hot melt adhesive film), and single foam material is changed into common composite material structure: polyethylene fiber net and plastic alloy sub-microporous foam; or for the occasion with low weight requirement, the single foam material can be changed into a sandwich composite structure: polyethylene fiber net, plastic alloy submicron foam cotton and polyethylene fiber net.
Material modification: the plastic alloy submicron foam after nano modification has a huge amount of submicron-level airtight foaming holes, and the energy absorption characteristic is greatly provided.
Detailed Description
1. The novel bulletproof plugboard is formed by compounding a plastic alloy sub-microporous foam and an ultrahigh-strength polyethylene fiber net by changing a composite concave-reducing sheet into a single foam material.
2. Preparation of composite concave-reducing tablet
2.1 autoclave process
(1) Process steps
Preparation of materials: cutting a high-strength polyethylene fiber net (PE net), plastic alloy microporous foam (SMHP type), a semi-solidified hot melt adhesive film (EPT I type film) and a release film into required sizes, wherein the sizes can be the sizes of a single bullet-proof plate or the sizes of a plurality of bullet-proof plates (after the compounding is finished, the single bullet-proof plate is cut into the sizes);
stacking of common composite structural materials: stacking a separation plate, a release film, a PE net, an EPT I film, SMHP foam, a release film and a separation plate (which can be an aluminum plate or a steel plate) in sequence, wherein the stacking is used as an independent unit; the independent units can be combined independently, and a plurality of units can be stacked to be combined together;
or stacking of sandwich composite structural materials: stacking a separator, a release film, a PE net, an EPT I film, an SMHP foam, an EPT I film, a PE net, a release film and a separator (which can be an aluminum plate or a steel plate) in order, wherein the stacking is used as an independent unit; the independent units can be combined independently, and a plurality of units can be stacked to be combined together;
vacuumizing: the independent units or the multiple groups of units are sleeved into a vacuum bag, put into an autoclave, and are connected with a vacuum pump for vacuumizing and are maintained;
compounding in an autoclave: pressurizing the cabin door of the closed autoclave to 1.0-1.3 MPa, starting heating, and keeping for 10 minutes when the temperature reaches 100 ℃; heating to 128 deg.C, and maintaining for 60min; cooling to below 80deg.C, relieving pressure, and taking out pieces;
finishing and cutting: and separating the release sheet on the composite release sheet of each unit, and cutting and finishing the release sheet into a finished product according to the required size.
(2) Process control parameters
Compression ratio of the sub-microporous foam: the foam is compressed during thermal compounding, which is also the process of reinforcing the foam during compounding and improving the adhesiveness of the foam and the PE net, and the compression ratio of the foam is controlled to be about 15%;
the foam thickness control method comprises the following steps: the height limiting strips are arranged at the outermost sides of the isolating plates, are fixed by double-sided countersunk rivets and the isolating plates below, and are 4 per unit;
compounding process parameters: the pressure is 1.3MPa, the temperature is 128 ℃, and the time is 60min;
2.1 Flat plate Hot pressing method
(1) Process steps
Preparation of materials: the same autoclave method;
stacking of materials: the same autoclave method;
and (3) placing a composite board: the independent units or the multiple groups of units are put into an upper flat plate pressing die and a lower flat plate pressing die of a hot press, and the upper units and the lower units are kept to be stacked neatly and cannot be misplaced;
compounding by a press: the pressure of the press is set to be about 1.3MPa, the upper and lower flat plates are molded, and the upper and lower flat plates are heated to 100 ℃ and kept for 10 minutes; heating to 130 ℃ again, and keeping for 60min; cooling to below 80deg.C, relieving pressure, and taking out pieces;
finishing and cutting: and separating the release sheet on the composite release sheet of each unit, and cutting and finishing the release sheet into a finished product according to the required size.
(2) Process control parameters
Compression ratio of the sub-microporous foam: the same autoclave method;
the foam thickness control method comprises the following steps: the same autoclave method;
compounding process parameters: the pressure is 1.3MPa, the temperature is 130 ℃ and the time is 60min.
3. Principle of concave reduction of composite bulletproof concave reduction sheet:
(1) energy absorption: the plastic alloy submicron foam has a large number of submicron-level closed foaming holes, and the strength of a hole wall film is greatly improved after nano modification; after the high-strength polyethylene fiber net and the foam are compounded, when being impacted, a large number of cells are broken and exploded, most of impact energy from bullets is absorbed in the process, and the back bulge value of the bulletproof back plate (PE, aramid back plate and the like) can be greatly reduced;
(2) reducing pressure: after the polyethylene net and the foam are compounded, the tensile strength is greatly provided, and the hardness and the bending strength are also provided to a certain extent, so that the anti-sagging polyethylene net is very beneficial to the anti-sagging of the bulletproof plate; after the concave reducing sheet is impacted by a bullet, the pressure of local points is diffused to the periphery, the contact area of the material and the daub is increased, and the local impact pressure is reduced, so that the back bulge of the bulletproof back plate (PE, aramid back plate and the like) is reduced;
(3) borrow space: the composite concave-reducing sheet has a certain thickness space, the impact is instantaneously and partially collapsed and destroyed, the thickness space of other parts is complete, and the bulletproof backboard is reduced by a certain amount by the complete thickness.
4. Characteristics (1)
(1) The composite bulletproof concave-reducing sheet structure (a polyethylene net and plastic alloy sub-microporous foam form a composite material through a hot melt adhesive film) is changed into a single foam material.
Sandwich composite structure: polyethylene fiber net, plastic alloy sub-microporous foam cotton and polyethylene fiber net;
a common composite structure: polyethylene fiber net and plastic alloy sub-microporous foam
(2) Material modification: the plastic alloy submicron foam after nano modification has a huge amount of submicron-level closed foaming holes, and the energy absorption characteristic is greatly provided;
5. test data
(1) Tensile strength comparison test of composite concave-reducing sheet and plastic alloy submicron sheet
(2) Test of impact and dent reducing effect
Taking a common composite structure of a 4mm composite concave-reducing sheet as an example, the composite concave-reducing sheet is compounded to the back surface of a ceramic/PE backboard bulletproof board through an adhesive, each bulletproof board (0.08M 2 protection area) is used for testing three guns M80 bullets, and the concave depth of the daub is tested under the condition that the bulletproof board is not penetrated. From the test, the composite dent reduction sheet had a dent reduction effect of 15mm in the case of the weight of the bulletproof plate or the like.
The dent reduction effect evaluation method comprises the following steps: the UD cloth with equal weight is used for replacing the dent reducing material, the PE backboard is thickened, and the dent difference value of the two structures is the dent reducing effect.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. A preparation method of a composite concave-reducing sheet for a bulletproof plugboard is characterized by comprising the following steps: the method comprises the following specific steps:
step one, preparing materials;
cutting a high molecular weight polyethylene fiber net, plastic alloy submicron foam, a semi-solidified hot melt adhesive film and a release film into required sizes;
step two, stacking materials;
stacking a separator, a release film, a high molecular weight polyethylene fiber web, a semi-solidified hot melt adhesive film, plastic alloy sub-microporous foam, the release film and the separator in sequence to form an independent unit;
step three, compression compounding;
compressing and compounding the independent units in the second step, and controlling the compression ratio of the plastic alloy sub-microporous foam to be 12% -18% to form a composite concave-reducing sheet preliminary model;
and step three, compression compounding, namely, the following steps: vacuumizing: stacking the single independent units or multiple independent units prepared in the second step, sleeving the independent units into a vacuum bag, putting the vacuum bag into an autoclave, connecting a vacuum pump for vacuumizing, and keeping the vacuum bag; compounding in an autoclave: pressurizing the cabin door of the closed autoclave to 1.0-1.3 MPa, starting heating, and keeping the temperature for 8-12 minutes when the temperature reaches 90-110 ℃; heating to 125-130 deg.c for 55-65min; cooling to below 80deg.C, relieving pressure, and taking out pieces;
or the compression compounding in the step three is specifically as follows: and (3) placing a composite board: placing single independent units or multiple groups of independent units into upper and lower flat pressing dies of a hot press after stacking, and keeping the upper and lower units stacked neatly without dislocation; compounding by a press: the pressure of the press is set at 1.2-1.4MPa, the upper and lower flat plates are molded, and the upper and lower flat plates are heated to 90-110 ℃ and kept for 8-12 minutes; heating to 125-135 deg.c for 55-65min; cooling to below 80deg.C, relieving pressure, and taking out pieces;
the control method of the thickness of the plastic alloy sub-microporous foam in the third step is as follows: a height limiting strip is added between two isolation plates of each independent unit, the height limiting strip is placed at the outermost side of the isolation plates, and the height limiting strip is fixed with the lower isolation plates by double-sided countersunk rivets;
step four, finishing and cutting;
separating the release film on the primary model of the composite concave-reducing sheet after compression and compounding in the third step, cutting and arranging according to the required size, and preparing the composite concave-reducing sheet for the bulletproof plugboard.
2. The method for preparing the composite concave-reducing sheet for the bulletproof plugboard, which is characterized by comprising the following steps of: step two, stacking materials;
the separator, the release film, the high molecular weight polyethylene fiber web, the semi-solidified hot melt adhesive film, the plastic alloy sub-microporous foam, the semi-solidified hot melt adhesive film, the high molecular weight polyethylene fiber web, the release film and the separator are stacked in sequence to be used as an independent unit.
3. The method for preparing the composite concave-reducing sheet for the bulletproof plugboard, which is characterized by comprising the following steps of: compounding in an autoclave: pressurizing the cabin door of the closed autoclave to 1.0-1.3 MPa, starting heating, and keeping for 10 minutes when the temperature reaches 100 ℃; heating to 128 deg.C, and maintaining for 60min; cooling to below 80deg.C, relieving pressure, and taking out the part.
4. The method for preparing the composite concave-reducing sheet for the bulletproof plugboard, which is characterized by comprising the following steps of: compounding by a press: the pressure of the press is set at 1.3MPa, the upper and lower flat plates are molded, and the upper and lower flat plates are heated to 100 ℃ and kept for 10 minutes; heating to 130 ℃ again, and keeping for 60min; cooling to below 80deg.C, relieving pressure, and taking out the part.
5. The method for preparing the composite concave-reducing sheet for the bulletproof plugboard, which is characterized by comprising the following steps of: each individual unit is equipped with 4 height-limiting bars.
6. The method for preparing the composite concave-reducing sheet for the bulletproof plugboard, which is characterized by comprising the following steps of: the plastic alloy sub-microporous foam is SMHP type plastic alloy sub-microporous foam.
7. The composite recess-reducing sheet for bulletproof plugboards prepared by the method for preparing the composite recess-reducing sheet for bulletproof plugboards according to any one of claims 1 to 6.
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| CN202210141347.2A CN114603862B (en) | 2022-02-16 | 2022-02-16 | Novel composite concave reducing sheet for bulletproof plugboard and preparation method thereof |
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| CN202210141347.2A CN114603862B (en) | 2022-02-16 | 2022-02-16 | Novel composite concave reducing sheet for bulletproof plugboard and preparation method thereof |
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| CN114603862B true CN114603862B (en) | 2024-03-26 |
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| CN112304160A (en) * | 2020-11-11 | 2021-02-02 | 江苏安卡新材料科技有限公司 | Reduce sunken shellproof picture peg structure |
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| WO2009048679A2 (en) * | 2007-08-03 | 2009-04-16 | Ermalovich Joseph M | Plastic encased multi-threat anti-ballistic material |
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| US8080486B1 (en) * | 2010-07-28 | 2011-12-20 | Honeywell International Inc. | Ballistic shield composites with enhanced fragment resistance |
| KR20160143949A (en) * | 2015-06-04 | 2016-12-15 | 주식회사 에스에이치글로벌 | preparing method for product using indirect heat method |
| WO2017019144A1 (en) * | 2015-07-27 | 2017-02-02 | Rocky Research | Multilayered composite ballistic article |
| CN111546713A (en) * | 2020-05-14 | 2020-08-18 | 上海联博安防器材股份有限公司 | Bulletproof flashboard and method for combining PE laminated board and paint thereof |
| CN112304160A (en) * | 2020-11-11 | 2021-02-02 | 江苏安卡新材料科技有限公司 | Reduce sunken shellproof picture peg structure |
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