CN110790621A - Double-sided pressure-sensitive explosive adhesive tape and preparation method thereof - Google Patents
Double-sided pressure-sensitive explosive adhesive tape and preparation method thereof Download PDFInfo
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- CN110790621A CN110790621A CN201911126228.4A CN201911126228A CN110790621A CN 110790621 A CN110790621 A CN 110790621A CN 201911126228 A CN201911126228 A CN 201911126228A CN 110790621 A CN110790621 A CN 110790621A
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/001—Fillers, gelling and thickening agents (e.g. fibres), absorbents for nitroglycerine
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/32—Compositions containing a nitrated organic compound the compound being nitrated pentaerythritol
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2407/00—Presence of natural rubber
- C09J2407/006—Presence of natural rubber in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
- C09J2433/006—Presence of (meth)acrylic polymer in the substrate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention relates to a double-sided pressure-sensitive explosive adhesive tape and a preparation method thereof, which solve the problems of poor adhesion property, low strength and the like of the existing flexible explosive. The double-sided pressure-sensitive explosive adhesive tape comprises a flexible explosive layer, wherein pressure-sensitive adhesive layers are coated on two sides of the flexible explosive layer, and a release material layer is attached to the pressure-sensitive adhesive layer on at least one side. During preparation, the pressure-sensitive adhesive is uniformly coated on two sides of the sheet-shaped flexible explosive, and a release material is attached to at least one side of the pressure-sensitive adhesive. The explosive has the advantages of strong adhesive force, good laminating performance, good explosion effect, convenient use and operation, simple process and the like.
Description
Technical Field
The invention belongs to the technical field of explosives, and particularly relates to a double-sided pressure-sensitive explosive adhesive tape and a preparation method thereof.
Background
The explosive processing of metal refers to the processing technology of processing and forming, surface hardening, explosive forming or welding a metal blank by using explosive as energy. With the development of production and the progress of scientific technology, new technology and new process for carrying out various processing on metals by using explosive which is a huge and cheap energy source will emerge continuously, and an infinite bright prospect is shown for the forming processing and comprehensive utilization of metal materials. As one of branches of explosive processing, hardening and strengthening of metals provide the best technical means for improving the surface hardness of the metals and prolonging the service life of the metals, wherein the surface hardening of high manganese steel related parts is widely concerned, and the high manganese steel has the characteristics of high toughness and wear resistance, is widely applied to railway frog, bearings, excavator bucket teeth and the like, and has low initial hardness and serious initial wear, so that the service life of the high manganese steel is influenced. The best surface treatment means at present is to harden and strengthen the explosive by using shock waves generated by explosion of the explosive.
Research results show that the metal explosion hardening is commonly used with explosives with small critical thickness, high explosion speed and high brisance. The common explosive is plastic explosive such as C-4 explosive and GMG explosion hardening explosive (CN 104892332A), but the mechanical strength of the explosive is low, and the density of the explosive can be changed by applying force carelessly in the laying process of the explosive, so that the hardening uniformity effect of the surface of the high manganese steel is influenced. Researchers develop flexible explosives using natural rubber as a binder, and the explosives are soft and have certain elasticity and flexibility, high mechanical strength, good low-temperature resistance and wide application prospect. However, the rubber explosive has poor bonding performance to non-planar metal parts under low temperature conditions, and the tablets are often tightly bonded to the metal surface by coating adhesives such as butter on the metal surface on site, but bubbles and gaps are easily left, and the thickness of the adhesives is uneven, which affects the explosion hardening effect.
Disclosure of Invention
The invention aims to solve the problems of poor adhesion performance, low strength and the like of the existing flexible explosive, and provides a double-sided pressure-sensitive explosive adhesive tape and a preparation method thereof.
The invention is realized by the following technical scheme:
a double-sided pressure-sensitive explosive adhesive tape comprises a flexible explosive layer, wherein pressure-sensitive adhesive layers are coated on the upper side and the lower side of the flexible explosive layer, and a release material layer is attached to the outer surface of at least one pressure-sensitive adhesive layer.
As the preferable technical scheme, the release material layer adopts a release film or release paper. The release film or the release paper can prevent the pressure-sensitive adhesive layer from being adhered and can also protect the flexible explosive from being polluted.
As a preferable technical scheme, the pressure-sensitive adhesive layer adopts acrylate pressure-sensitive adhesive. The acrylate pressure-sensitive adhesive is formed by copolymerizing acrylate monomers, has good cohesive strength and adhesive property, and is suitable for bonding with the surface of a metal material. The acrylate pressure-sensitive adhesive is uniformly coated on the upper side and the lower side of the flexible explosive, and the thickness of the acrylate pressure-sensitive adhesive is generally not more than 30 mu m.
As a preferable technical scheme, the flexible explosive layer is prepared by mixing 10-15 parts by weight of high polymer material adhesive and 85-90 parts by weight of single-substance high explosive.
As a preferable technical scheme, the high polymer material adhesive is prepared by mixing 80-90 parts by weight of natural rubber/latex and 10-20 parts by weight of polymethyl acrylate, and the single-substance high explosive adopts PETN (Takara), RDX (hexogen), HMX (HMX) or CL-20. The natural rubber/latex has high elasticity, can be used for shaping, and has very good mechanical strength and good flexing resistance. The polymethyl acrylate can be crosslinked with the natural rubber/latex to form an interpenetrating network, so that the bonding property of the natural rubber/latex is improved, and the connection strength with the acrylate pressure-sensitive adhesive is also improved.
As a preferred technical scheme, the thickness of the flexible explosive layer is 0.8-1.2 mm.
Further, the invention also provides a preparation method of the double-sided pressure-sensitive explosive adhesive tape, which comprises the following steps: 1) weighing natural rubber/latex and polymethyl acrylate in proportion, pouring the weighed natural rubber/latex and polymethyl acrylate into a container, and uniformly stirring and mixing to obtain a high polymer material binder; 2) the prepared high polymer material adhesive and the single-substance high explosive are weighed according to the proportion and poured into a container, and are uniformly stirred by a copper bar to prepare the flexible explosive; 3) preparing the prepared flexible explosive into flexible explosive tablets by a tablet making machine; 4) uniformly coating acrylate pressure-sensitive adhesive on the upper side and the lower side of the tablet, and drying by warm air; 5) and covering a release film or release paper on the acrylate pressure-sensitive adhesive on at least one side to finally prepare the double-sided pressure-sensitive explosive adhesive tape.
The double-sided pressure-sensitive explosive adhesive tape can be divided into two kinds of explosive adhesive tapes according to the arrangement of the release material layer: the plate-shaped double-sided pressure-sensitive explosive adhesive tape can be prepared when release layer materials are arranged on two sides, and the roll-shaped double-sided pressure-sensitive explosive adhesive tape can be prepared when the release layer materials are arranged on one side.
The double-sided pressure-sensitive explosive adhesive tape provided by the invention realizes the purpose of processing the metal surface by utilizing the impact effect of the explosive on the surrounding medium during explosion, and has the advantages of strong adhesive force, good bonding property, uniform explosion impact and high hardening efficiency. When the explosive is used, the explosive can be cut into various shapes according to actual needs, and the explosive can be adhered to the surface of a material to be treated by uncovering the release material layer, so that the explosive is convenient to use.
According to the double-sided pressure-sensitive explosive tape, the pressure-sensitive adhesive is introduced to the surface of the novel flexible explosive, so that the adhesion performance of the explosive is remarkably improved, and the double-sided pressure-sensitive explosive tape is not influenced by the surface position of a test piece. The total thickness of the explosive can be flexibly changed according to the thickness requirement of the explosive hardened by one-time explosion. In addition, the pressure-sensitive adhesive layer can effectively protect the metal surface from ablation, so that the explosion impact effect is uniform. The explosive adhesive tape has the advantages of strong adhesive force, good mechanical property, good explosion effect, convenient use and operation, simple process and the like. The required number of layers can be calculated according to the total thickness of the explosive on the explosion site, and the explosive is only required to be overlapped and bonded, so that the operation is convenient. Has important application value in the special blasting fields of explosion hardening and the like.
Drawings
FIG. 1 is a schematic structural diagram of a plate-shaped double-sided pressure-sensitive explosive tape.
Fig. 2 is a structural schematic diagram of a double-sided pressure-sensitive explosive adhesive tape in a roll shape.
In the figure: 1-a release material layer, 2-a pressure sensitive adhesive layer and 3-a flexible explosive layer.
Detailed Description
The invention is further described below with reference to specific examples:
example 1
A double-sided pressure-sensitive explosive adhesive tape comprises a flexible explosive layer 3, pressure-sensitive adhesive layers 2 are coated on the upper side and the lower side of the flexible explosive layer 3, and release material layers 1 are attached to the outer surfaces of the pressure-sensitive adhesive layers 2 on the two sides, and the structure of the double-sided pressure-sensitive explosive adhesive tape is shown in figure 1.
The flexible explosive layer 3 is made by mixing high polymer material adhesive and single-substance high explosive. The high molecular material adhesive is prepared by mixing natural rubber/latex and polymethyl acrylate, and the single-substance high explosive adopts PETN. The thickness of the flexible explosive layer was 0.8 mm.
The pressure-sensitive adhesive layer 2 is made of acrylate pressure-sensitive adhesive, and the thickness of the pressure-sensitive adhesive layer is 25 micrometers.
The release material layer 1 is a release film.
The preparation method of the double-sided pressure-sensitive explosive adhesive tape comprises the following steps: 1) pouring 85 parts by weight of natural rubber/latex and 15 parts by weight of polymethyl acrylate into a container, and uniformly stirring and mixing to prepare a high polymer material binder; 2) pouring 90 parts by weight of high polymer material adhesive and 10 parts by weight of PETN into a container, and uniformly stirring by using a copper bar to prepare a flexible explosive; 3) preparing the prepared flexible explosive into flexible explosive tablets with the thickness of 0.8mm by a tablet making machine; 4) uniformly coating 25 mu m thick acrylate pressure-sensitive adhesive on the upper side and the lower side of the tablet, and drying by warm air; 5) covering a release film on the acrylate pressure-sensitive adhesive on two sides to finally prepare the plate-shaped double-sided pressure-sensitive explosive adhesive tape.
In the method, the tensile strength of the prepared flexible explosive is 1.1MPa, and the tensile strength of the prepared double-sided pressure-sensitive explosive adhesive tape is 10.8 MPa. The double-sided pressure-sensitive explosive adhesive tape still can keep good fit with the surface of high-manganese steel at the temperature of minus 20 ℃. The two layers of double-sided pressure-sensitive explosive adhesive tapes are laminated and adhered to the surface of high-explosive steel, and after the double-sided pressure-sensitive explosive adhesive tapes are detonated by a detonator, the explosive has good explosion transfer performance and no ablation traces on the surface.
Example 2
A double-sided pressure-sensitive explosive adhesive tape comprises a flexible explosive layer 3, pressure-sensitive adhesive layers 2 are coated on the upper side and the lower side of the flexible explosive layer 3, and release material layers 1 are attached to the outer surfaces of the pressure-sensitive adhesive layers 2 on one side of the flexible explosive layer, and the structure of the double-sided pressure-sensitive explosive adhesive tape is shown in figure 2.
The flexible explosive layer 3 is made by mixing high polymer material adhesive and single-substance high explosive. The high molecular material adhesive is prepared by mixing natural rubber/latex and polymethyl acrylate, and the simple substance high explosive adopts RDX. The thickness of the flexible explosive layer was 1.2 mm.
The pressure-sensitive adhesive layer 2 is made of acrylate pressure-sensitive adhesive, and the thickness of the pressure-sensitive adhesive layer is 20 micrometers.
The release material layer 1 adopts release paper.
The preparation method of the double-sided pressure-sensitive explosive adhesive tape comprises the following steps: 1) pouring 80 parts by weight of natural rubber/latex and 20 parts by weight of polymethyl acrylate into a container, and uniformly stirring and mixing to prepare a high polymer material binder; 2) pouring 85 parts by weight of high polymer material adhesive and 15 parts by weight of PETN into a container, and uniformly stirring by using a copper bar to prepare a flexible explosive; 3) preparing the prepared flexible explosive into flexible explosive tablets with the thickness of 0.8mm by a tablet making machine; 4) uniformly coating 25 mu m thick acrylate pressure-sensitive adhesive on two sides of the tablet, and drying by warm air; 5) and covering a release film on the acrylate pressure-sensitive adhesive on one side to finally prepare the roll-shaped double-sided pressure-sensitive explosive adhesive tape.
In the method, the tensile strength of the prepared flexible explosive is 0.7MPa, and the tensile strength of the prepared double-sided pressure-sensitive explosive adhesive tape is 9.2 MPa. The double-sided pressure-sensitive explosive adhesive tape still can keep good fit with the surface of high-manganese steel at the temperature of minus 20 ℃. The three layers of double-sided pressure-sensitive explosive tapes are laminated and adhered to the surface of high-explosive steel, and after the three layers of double-sided pressure-sensitive explosive tapes are detonated by a detonator, the explosive has good detonation transfer performance and no ablation traces on the surface.
Example 3
A double-sided pressure-sensitive explosive adhesive tape comprises a flexible explosive layer 3, pressure-sensitive adhesive layers 2 are coated on the upper side and the lower side of the flexible explosive layer 3, and release material layers 1 are attached to the outer surfaces of the pressure-sensitive adhesive layers 2 on the two sides.
The flexible explosive layer 3 is made by mixing high polymer material adhesive and single-substance high explosive. The high molecular material adhesive is prepared by mixing natural rubber/latex and polymethyl acrylate, and the single high explosive adopts HMX. The thickness of the flexible explosive layer was 1.0 mm.
The pressure-sensitive adhesive layer 2 is made of acrylate pressure-sensitive adhesive, and the thickness of the pressure-sensitive adhesive layer is 30 micrometers.
The release material layer 1 is a release film.
The preparation method of the double-sided pressure-sensitive explosive adhesive tape comprises the following steps: 1) pouring 90 parts by weight of natural rubber/latex and 10 parts by weight of polymethyl acrylate into a container, and uniformly stirring and mixing to prepare a high polymer material binder; 2) pouring 88 parts by weight of high polymer material binder and 12 parts by weight of HMX into a container, and uniformly stirring by using a copper bar to prepare the flexible explosive; 3) preparing the prepared flexible explosive into flexible explosive tablets with the thickness of 1.0mm by a tablet making machine; 4) uniformly coating 30 mu m thick acrylate pressure-sensitive adhesive on the upper and lower sides of the tablet, and drying by warm air; 5) covering a release film on the acrylate pressure-sensitive adhesive on two sides to finally prepare the plate-shaped double-sided pressure-sensitive explosive adhesive tape.
In the method, the tensile strength of the prepared flexible explosive is 1.0MPa, and the tensile strength of the prepared double-sided pressure-sensitive explosive adhesive tape is 9.9 MPa. The double-sided pressure-sensitive explosive adhesive tape still can keep good fit with the surface of high-manganese steel at the temperature of minus 20 ℃. The two layers of double-sided pressure-sensitive explosive adhesive tapes are laminated and adhered to the surface of high-explosive steel, and after the double-sided pressure-sensitive explosive adhesive tapes are detonated by a detonator, the explosive has good explosion transfer performance and no ablation traces on the surface.
Claims (7)
1. A double-sided pressure sensitive explosive tape, characterized in that: the flexible explosive layer is coated with pressure sensitive adhesive layers on the upper side and the lower side, and a release material layer is attached to the outer surface of at least one pressure sensitive adhesive layer.
2. A double-sided pressure sensitive explosive tape according to claim 1, wherein: the release material layer adopts a release film or release paper.
3. A double-sided pressure sensitive explosive tape according to claim 2, wherein: the pressure-sensitive adhesive layer is acrylate pressure-sensitive adhesive.
4. A double-sided pressure sensitive explosive tape according to claim 3, wherein: the flexible explosive layer is prepared by mixing 10-15 parts by weight of high polymer material adhesive and 85-90 parts by weight of single-substance high explosive.
5. A double-sided pressure sensitive explosive tape according to claim 4, wherein: the high molecular material adhesive is prepared by mixing 80-90 parts by weight of natural rubber/latex and 10-20 parts by weight of polymethyl acrylate, and the single-substance high explosive adopts PETN, RDX, HMX or CL-20.
6. A double-sided pressure sensitive explosive tape according to any one of claims 1 to 5, wherein: the thickness of the flexible explosive layer is 0.8-1.2 mm.
7. A method of making a double-sided pressure sensitive explosive tape according to claim 5, comprising the steps of: 1) weighing natural rubber/latex and polymethyl acrylate in proportion, pouring the weighed natural rubber/latex and polymethyl acrylate into a container, and uniformly stirring and mixing to obtain a high polymer material binder; 2) the prepared high polymer material adhesive and the single-substance high explosive are weighed according to the proportion and poured into a container, and are uniformly stirred by a copper bar to prepare the flexible explosive; 3) preparing the prepared flexible explosive into flexible explosive tablets by a tablet making machine; 4) uniformly coating acrylate pressure-sensitive adhesive on the upper side and the lower side of the tablet, and drying by warm air; 5) and covering a release film or release paper on the acrylate pressure-sensitive adhesive on at least one side to finally prepare the double-sided pressure-sensitive explosive adhesive tape.
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| CN201911126228.4A CN110790621A (en) | 2019-11-18 | 2019-11-18 | Double-sided pressure-sensitive explosive adhesive tape and preparation method thereof |
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| CN201911126228.4A CN110790621A (en) | 2019-11-18 | 2019-11-18 | Double-sided pressure-sensitive explosive adhesive tape and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2540672C2 (en) * | 2013-05-06 | 2015-02-10 | Открытое Акционерное Общество "Красноармейский научно-исследовательский институт механизации" | Method of cartridging of blasting powders and device for its implementation |
| CN104892332A (en) * | 2015-05-15 | 2015-09-09 | 辽宁庆阳民爆器材有限公司 | GMG explosion hardening explosive |
-
2019
- 2019-11-18 CN CN201911126228.4A patent/CN110790621A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2540672C2 (en) * | 2013-05-06 | 2015-02-10 | Открытое Акционерное Общество "Красноармейский научно-исследовательский институт механизации" | Method of cartridging of blasting powders and device for its implementation |
| CN104892332A (en) * | 2015-05-15 | 2015-09-09 | 辽宁庆阳民爆器材有限公司 | GMG explosion hardening explosive |
Non-Patent Citations (1)
| Title |
|---|
| 《世界爆破器材手册》编辑部: "《世界爆破器材手册》", 31 October 1999, 兵器工业出版社 * |
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Application publication date: 20200214 |
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