CN1085654A - Improved shock tube structures - Google Patents
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- CN1085654A CN1085654A CN93118623A CN93118623A CN1085654A CN 1085654 A CN1085654 A CN 1085654A CN 93118623 A CN93118623 A CN 93118623A CN 93118623 A CN93118623 A CN 93118623A CN 1085654 A CN1085654 A CN 1085654A
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- 230000035939 shock Effects 0.000 title claims description 24
- 239000000463 material Substances 0.000 claims description 46
- 239000000203 mixture Substances 0.000 claims description 41
- 229920000642 polymer Polymers 0.000 claims description 26
- 239000000956 alloy Substances 0.000 claims description 22
- 229910045601 alloy Inorganic materials 0.000 claims description 22
- 239000004957 Zytel Substances 0.000 claims description 15
- 229920006102 Zytel® Polymers 0.000 claims description 15
- -1 polyethylene Polymers 0.000 claims description 15
- 229920003182 Surlyn® Polymers 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 229920001179 medium density polyethylene Polymers 0.000 claims description 10
- 239000004701 medium-density polyethylene Substances 0.000 claims description 10
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 9
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 5
- 229920002292 Nylon 6 Polymers 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 230000003252 repetitive effect Effects 0.000 claims description 4
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- RYECOJGRJDOGPP-UHFFFAOYSA-N Ethylurea Chemical compound CCNC(N)=O RYECOJGRJDOGPP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 3
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920005649 polyetherethersulfone Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 3
- 229920003313 Bynel® Polymers 0.000 claims description 2
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- 229920001155 polypropylene Polymers 0.000 claims 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims 2
- TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 claims 1
- 239000000026 Pentaerythritol tetranitrate Substances 0.000 claims 1
- 239000004695 Polyether sulfone Substances 0.000 claims 1
- 229960004321 pentaerithrityl tetranitrate Drugs 0.000 claims 1
- 229920006393 polyether sulfone Polymers 0.000 claims 1
- 239000012255 powdered metal Substances 0.000 claims 1
- 238000007654 immersion Methods 0.000 description 16
- 238000012360 testing method Methods 0.000 description 13
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- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 1
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- 229910017604 nitric acid Inorganic materials 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
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- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/04—Detonating fuses
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to the structure of impact tube, it has an outer wall and an inwall, and wherein improved result makes impact tube have more toughness to the carrying capacity of environment that is added on the impact tube in use.
Description
The present invention relates to improved shock tube structures, as the trigger of explosive incident.
In the past few decades, the trigger field has become the field of the keen competition of invention.From this field that the human civilization enlightening stage just begins, change and come very slowly.In explosive incident in the past, generally all be to use electric wire or fuse rope, be connected to igniting fill that bigger blast filler detonates by device electricity or machinery.
In nearer period, used no fuse trigger to start explosive incident with non-electricity.Persson is at United States Patent (USP) 3,590, started the leap first time in this field in 739.Have been found that to use a plastic tube and be coated with one deck explosive and can ignite this ignition charge effectively in the inside of pipe.This plastic tube is referred to as impact tube in the blast field.Generally speaking, ignite an end of impact tube by the small blasting blast of detonator (for example from), light the reaction material of impact tube inside, produce shock wave thus, shock wave is propagated along the length of impact tube, makes the energy of shock wave be transported to the dynamite charge thing that is positioned at the impact tube other end.
The same with any emerging technology, the progress of the non-electric initiation device impact tube of establishment also is faced with the predicament that is difficult to predict, the starting stage of these predicaments and development of new techniques is relevant.Therefore carried out improving, but problem still exists in actual use so that solve some continuity problem that these those skilled in the art know.The typical problem that runs in actual use is: the influence of impact sensitivity, the cracked and environment of heat, and for example infiltration of organic solvent and/or water, they may make the impact tube performance failure.
Common practice is to use product in adverse circumstances in the blast field.Therefore, blast products must normally use in environment unusual concerning most of other products.Temperature range can be from extremely cold to very hot.The environmental condition of product may be a solvent-saturated, as in water, organic solvent and/or their mixtures or the mixture between them separately.Impact event is pulverized the impact tube product by any solid and is taken place.When standing each environmental test, the reliability of impact tube and validity all are risky.Because existing detection is difficult to determine at any time to damage or damaged product, therefore expected product has toughness to above-mentioned impact tube test in this field.
Expectation provides largely protection, and these ideas are authorized in people's such as Simon the Canadian Patent 1,200,718 open on February 18th, 1986, here with reference to having introduced this patent.This particular embodiment discloses a kind of sandwich type structure, and this structure has a plastic tube, second plastic bushing different with it of plastic tube overcoat.
We find that the present invention is useful as the impact tube trigger, and have found that the present invention has more toughness than existing structure under above-mentioned environmental condition.The product of gained is a hierarchy, will disclose this structure below.
This shock tube structures comprises a pipe with outer wall and inwall, said pipe comprises EXEL impact tube material (the ICI trade mark that professional group has that explodes, the part of this unit is ICI blast u s company and ICI Canada Company, below be referred to as " ICI "), the SURLYN impact tube material (trade mark of Du Pont (Du Pont), can obtain as impact tube by ICI or Ensign-Bickford Company), or certain polyethylene, wherein said inside pipe wall scribble reaction material and and the connection of this reaction material, said pipe outer wall and one first outer the connection, said first skin comprises that a kind of polymer alloy is the ZYTEL polymer alloy (trade mark of Du Pont, can obtain from Du Pont, ZYTEL is nylon 6 and polyolefinic mixture, wherein particularly preferably be ZYTEL FE 7101, can obtain from Du Pont), and/or its blend, wherein said first skin preferably joins with one second skin, one first bond course and the said outer wall and said first outer the connection are preferably arranged, and one second bond course and said second outer be communicated with outer with said first preferably arranged.This pipe is best to be made by EXEL impact tube material, SURLYN 8940 or SURLYN 8941 materials, and EXEL impact tube material is this pipe most preferred material.
The size of pipe is the internal diameter (ID) of 0.095 inch external diameter (OD) and 0.044 inch preferably.Reaction material in the EXEL pipe or explosive material can comprise: pentaerythrite four nitric acid (PETN), ring tetramethylene tetranitro amine (HMX) or its powder metal mixture (for example aluminium).The scope of tube core loadings (promptly being coated in the reaction material quantity of the inside of pipe) is from about 7 milligrams/meter to about 30 milligrams/meter.The preferred loadings of EXEL impact tube is about 16 milligrams/meter for HMX/ aluminium blend.
First skin comprises the alloy of polymer, for example ZYTEL polymer alloy and/or its blend.Surprisingly, the ZYTEL polymer alloy can closely contact with the EXEL impact tube and/or be communicated with.The ZYTEL polymer alloy is made up of the nylon derived material because the EXEL impact tube is made of the polyethylene derived material, just makes above-mentioned situation wondrous.In general, nylon and polyethylene can not produce tight contact the between the interface.But the blend of ZYTEL polymer alloy is made up of polyethylene and poly blend, and this helps to illustrate above-mentioned ability.Preferred polyethylene is LLDPE (LLDPE) and medium density polyethylene (MDPE).
When not having the preferred second layer in the shock tube structures in layering, first skin preferably includes ZYTEL polymer alloy and blend thereof, and first skin is that the ZYTEL polymer alloy is then best.When checking with transmission electron microscopy, this polymer alloy comprises and is combined into single-phase various polymerization homologues, and the blend of polymer demonstrates heterogeneous form under same resolution ratio.The molecular weight ranges that is used as the polymer of blend and/or alloy can be from about 50 mass units of every repetitive until about 150,000 mass units of every repetitive.Mass unit is generally got the average of the copolymer of making polymer and/or may existing.Have been found that first skin applies impact tube serially, the external diameter of impact tube/layer structure is reached about 0.118 inch.
First skin that the ZYTEL polymer alloy provides can show toughness in impact tube may be forced to the abominable severe rugged environment of work.But have been found that this first skin can also become the preferred second outer field perfect substrate.When having second skin, first skin can comprise other material except that polymer alloy.In sandwich construction, for the performance of seeking the toughness impact tube can be provided by combination layer and composite structure.Be desirably in and effectively utilize plural independent skin in the shock tube structures.
When shock tube structures of the present invention is sandwich construction, first skin comprises the polymers alloy, ZYTEL polymer alloy for example, polyvinyl dichloride (Saran), polyethylene vinyl chloride (Polyethylene vinyl chloride) (EVOH), polyvinyl chloride (PVC), any thermoplastic material, the composition of thermoplastic material, for example polyether sulfone (PES) and polyether ethersulfone (PEES), rubber or elastomer, nylon 6 or nylon 66, MARANYL(trade mark for example, by ICI PLC supply), Kodar-PETG is as blend, be trade mark from 5%-95%(Kodar by weight, supply by KODAK, Kodar PETG is commonly referred to as ethylidene-1,4-cyclohexylidene dimethylene terephthalate (ethylene-1,4-cyclohexylenedimethylene terephthalate), it is the PET[Polyethylene Terephthalates] the part of thermoplastic polyester family), Kodar and 5% to 95%(by weight) the LLDPE blend, Kodar and 5% to 95%(by weight) the Pellethane blend, for example Pellethane 2103 and 2355(are from DOW Chemical) and polyester, for example RYNITE PBT(is from DOW Chemical), and polyester, for example RYNITE PBT(is from Du Pont, particularly preferably be Rynite RE6129), and 5% to 95%(by weight) the MDPE blend.Thickness impact pipe/first layer structure of these materials that apply on said pipe preferably reaches about 0.118 inch.
When carrying out multiple layer combination, the second outer field material also can be outer identical with first.The best second outer field material and first skin are not similar, so that can utilize the sum total of different nature or the build-up effect of used each material.The preferred second outer field example is the SURLYN material, SURLYN 8940 and 8941 for example, LLDPE, or MDPE, and/or their composition.The second outer field optimal material is LLDPE or MDPE.The scope of second outer layer thickness should be, its minimum thickness be can with the thickness of the first outer pantostrat that be communicated with, its maximum ga(u)ge is the thickness by the consideration of real economy benefit.The preferred value of the external diameter (OD) that impact tube/first skin/second skin adds up to is about 0.150 inch.Best structure is about 0.044 inch internal diameter (ID) and about 0.095 inch external diameter (OD), and the external diameter OD of impact tube/first layer structure is about 0.118 inch, and the external diameter OD of impact tube/first skin/second layer structure is about 0.150 inch.Can add additional outer layer, its thickness maximum is about 0.030 inch.
Introduce one first bond course between each adjacent skin or between some adjacent skin and preferably also having one second bond course or a plurality of bond course, the advantage that can obtain adding.The example of these bond courses is PLEXAR(trade marks, can obtain from Quantum Chemical Corp.), the BYNEL(trade mark, can obtain by Du Pont), the ADMER(trade mark, can obtain by Mitsui Petrochemical Industries) and the MODIC(trade mark, can be by Mitsubishi Petrochemical Co., LTD obtains).We believe, the interface surface of the material that these bond courses can be by activating two kinds of fundamental differences promotes bonding and/or adheres to.Some bond courses can prevent the wriggling of capillarity and/or interlayer like this.Hierarchy is carried out thermal annealing, the plasma corona discharge, processing flame, machinery and/or chemistry all has similar effects.
Another kind of alternative plan is the coupling agent that adds up to 5%, and coupling agent comprises bond course or its certain part, for example KEN-REACT CAPS LI2/L(Kenrich) and CRODAMIDE EBS(Croda Corp.).These compounds help those phase counterdiffusion between the mixed polymer of can not dissolving each other mutually, and the bonding of interlayer is provided, and make polymer and blend flow through extrusion equipment easily, have reduced energy requirement.
Making the method for layering shock tube structures, is those well-known methods of technical staff in pipe/layered cylinders structure field.In general, pipe is vertical extruding, and heating and extruding are carried out simultaneously.When pipe forms,, make the pipe cooling, carry out cold stretch then at the inside of pipe application of reactive material.Can make pipe annealing, be coated with then with first skin, for example the ZYTEL polymer alloy.Adding first skin can carry out simultaneously with the formation of pipe, perhaps forms the back at pipe and adds.Can add second skin and extra play by the known extruding brushing of technical staff in the art technology then.Specifically, be preferably in independent additional step brushing second skin.
Fig. 1 represents the profile of layering impact tube.
Fig. 2 represents to cut the layering impact tube of a part.
Fig. 1 represents the profile of layering shock tube structures.The 2nd, the inwall of pipe 1, the 3rd, the outer wall of pipe.First outer 4 is communicated with outer wall 3.Second outer 5 preferably is communicated with first outer 4.In a further advantageous embodiment, first bond course 6 is interfaces of the outer wall 3 and first skin 4, and preferred second bond course 7 is interfaces of first outer 4 and second skin 5.Reaction material is coated on the inwall 2, thereby has finished the utility structure of layering impact tube 8.
Fig. 2 represents to have cut a part, and wherein 1 is a continuous pipe, and 4 is first continuous skins, and 5 is second continuous skins.
Following table is represented the result of the test of said structure.
The purpose that provides the example in the table is in order to understand invention disclosed herein better rather than will to apply restriction to scope of the present invention.All examples are all undertaken by extruding EXEL base pipe, see people such as Greenhorn, the european patent application on 1989 January 18, and here with reference to having quoted this patent, overcoat second and the 3rd layer then.The implication of " overcoat " is that an additional material is coated on substrate or the base pipe.
Allow sample stand the conventional environment examination of oil immersion test with the simulation impact tube.This oil immersion test is that temperature is immersed at the middle part of 2 meters long multilayer pipe sample is in 50 ℃ the Shell Arctic level diesel oil, the two ends of this sample cell all be passed through thermosealed.Keep thermosealed two ends not have oil.Every now and then sample is taken out from oil groove, and with conventional device (injection shell initiator (Shot Shell primer), spark gap initiator, trigger, or the like) from dry end (blast) these samples that detonate.Produced shock wave and shock wave if detonate and walked the whole length of pipe, thought that then this pipe did not lose efficacy.
Second environmental test is used for estimating pipe fracture at room temperature, pressing about 30 seconds on the pipe that doubling folds with the weight of 75 pounds (34 kilograms).Check crack conditions by perusal then.If on testing site place pipe, visible crack is arranged, then think this tube failure.
The 3rd test relates to equipment shown in Figure 3, allows the weight of 5 pounds (2.27 kilograms) fall down from eminence and falls on the sample cell, and height is increased to 50 inches (127 centimetres) gradually from 5 inches (12.7 centimetres), and increment is 5 inches at every turn.This sample cell will keep straightened condition on platform when weight falls.After the impact, as first test, ignite this pipe.If the pipe fracture is very big, then this pipe can not be propagated shock wave.If this pipe can be propagated shock wave by this shock point, think that then this pipe has passed through the test that 5 pound weight things under this falling height impact.This experiment can at room temperature or be higher than under the room temperature to be carried out, or carries out under-40 ℃ temperature.
The 4th test is at room temperature a complete noiseless non-electric initiation device to be immersed in the room temperature water.Water is pressurized to 100 pounds/inch
2, sample is taken out and the shock motion situation of sample survey and the ability of igniting trigger.
In table, provide the result of the test of each example.Relevant with these special cases is described as follows:
The pipe of example 1-gained is extremely hard, ruptures easily when therefore crooked.
Example 2-has some to improve, and this pipe shows unexpected good powder bonded character, but fracture is still quite easy.
Example 3-pipe is extremely hard, therefore is easy to impact fracture.Outstanding anti-oil immersion ability is arranged.
Example 4-is hard, does not have effective anti-oil immersion performance.
The anti-oil immersion performance of example 5-has improvement, and pipe is hard.
The anti-oil immersion of example 6-, the performance of fracture and shock-sensitive aspect has improvement.
Example 7-shock-sensitive, and certain anti-oil immersion performance is arranged.
Example 8-shock-sensitive has good anti-oil immersion performance, but is difficult to processing.
Example 9-shock-sensitive has good anti-oil immersion performance.
Example 10-shock-sensitive, anti-oil immersion poor performance.
The anti-oil immersion performance that example 11-is outstanding, outstanding impact property, impact may make anti-oil immersion performance depreciation.
The anti-oil immersion performance that example 12-is outstanding, shock-sensitive but be difficult to processing.
Example 13-shown in three times the test in performance outstanding, even flexibility is also arranged at-40 ℃.Various types is all made by blend, and three layers also is outstanding.
The anti-oil immersion performance that example 14-is good, shock-sensitive.
The anti-oil immersion performance that example 15-is outstanding, but impact extremely responsive.
Example 16-is difficult to normal operation, impacts very responsive.
Example 17-is hard, outstanding anti-oil immersion performance and impact sensitivity.
Example 18-oil-resistant characteristic is poor, and coating is decomposed.
Annotate: (1) KODAR PETG is KODAR Chemicals(Kodak chemical company) brand name.SURLYN, ZYTEL and RYNITE are DuPont(E.I.Du Pont Company) brand name.
(2) definition of shock-sensitive is to rupture easily when impacting.
Claims (17)
1, a kind of shock tube structures, comprise a pipe, this Guan Youyi outer wall and an inwall, said pipe chooses from following this group material: the EXEL impact tube, the SURLYN impact tube, the perhaps blend of polythene material and it, wherein said inside pipe wall is communicated with reaction material, wherein said pipe outer wall and one first outer the connection, said first skin is made up of a kind of polymer alloy and/or its blend, said first skin and one second outer the connection, said second skin is made up of the material that following this group material chooses: nylon, polyethylene, polymer alloy, thermoplastic, elastomer, their compositions separately, and/or the composition between them, and one first bond course and the said outer wall and said first outer the connection are preferably arranged, one second bond course and said second outer be communicated with outer with said first preferably arranged.
2, structure as claimed in claim 1 is characterized in that said first skin is the ZYTEL polymer alloy.
3, structure as claimed in claim 1 is characterized in that said second skin chooses: SURLYN 8940 materials, SURLYN 8941 materials, LLDPE, medium density polyethylene, their compositions separately and/or the composition between them from following this group material.
4, structure as claimed in claim 1 is characterized in that said second skin is linea low density polypropylene or medium density polyethylene.
5, structure as claimed in claim 1 is characterized in that said first bond course elects material from following this group: PLEXAR BYNEL, ADMER, MODIC, their compositions separately and/or the composition between them.
6, structure as claimed in claim 1, it is characterized in that said reaction material chooses: pentaerythritol tetranitrate from following this group material, ring tetramethylene tetranitro amine, their powder metal mixture, their compositions separately and/or the composition between them.
7, structure as claimed in claim 6 is characterized in that said powdered-metal is an aluminium.
8, structure as claimed in claim 6 is characterized in that said reaction material is ring tetramethylene tetranitro amine and aluminium powder metal.
9, structure as claimed in claim 1, the molecular weight that it is characterized in that the said polymer alloy are that 50 mass units of each repetitive are to each repetitive 150,000 mass unit.
10, structure as claimed in claim 1 is characterized in that the pipe of said combination and the first outer field diameter are about 0.118 inch.
11, a kind of shock tube structures, comprise a pipe, this Guan Youyi outer wall and an inwall, said pipe chooses from following material: the EXEL impact tube, the SURLYN impact tube, perhaps polythene material and blend thereof, wherein said inside pipe wall is communicated with reaction material, wherein said pipe outer wall and one first outer the connection, said first skin chooses from following this group material: polymer alloy and blend thereof, polyvinyl dichloride, polyethylene vinyl chloride, polyvinyl chloride, thermoplastic, polyether sulfone, polyether ethersulfone, rubber, elastomer, nylon 6, nylon 66, ethylidene-1,4-cyclohexylidene dimethylene terephthalate, LLDPE, medium density polyethylene, polyester, poly-(PETP), their compositions separately and/or the composition between them, said first skin and one second outer the connection, said second skin chooses from following this material: nylon 6, nylon 66, polyvinyl dichloride, polyethylene vinyl chloride, polyvinyl chloride, LLDPE, medium density polyethylene, polymer alloy, thermoplastic, elastomer, polyester, SURLYN 8940, SURLYN 8941, their compositions separately and/or the composition between them, and one first bond course and the said outer wall and said first outer the connection are preferably arranged, one second bond course and said second outer be communicated with outer with said first preferably arranged.
12, structure as claimed in claim 11, it is characterized in that said first skin chooses: ethylidene-1 from following this group material, 4-cyclohexylidene dimethylene terephthalate and 5% to 95%(is by weight) the LLDPE blend, ethylidene-1,4-cyclohexylidene dimethylene terephthalate and 5% to 95%(is by weight) Pellethane, RYNITE PBT and 5% to 95%(by weight) the medium density polyethylene blend.
13, structure as claimed in claim 11 is characterized in that said first skin is ZYTEL, and said second skin is elected from following this group material; Linea low density polypropylene, middle density polypropylene, SURLYN 8940, SURLYN 8941, their certain compositions separately and/or certain composition between them.
14, structure as claimed in claim 1 is characterized in that said coupling agent comprises said first or second bond course, or their part.
15, structure as claimed in claim 1 is characterized in that the said reaction material that provides is about 16 milligrams/meter core load.
16, structure as claimed in claim 11 is characterized in that the internal diameter of said pipe is about 0.044 inch, and external diameter is about 0.095 inch, and the outer field total external diameter of pipe/the first skin/second is about 0.150 inch.
17, structure as claimed in claim 11 is characterized in that said first skin includes and the said second outer different material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US95730892A | 1992-10-06 | 1992-10-06 | |
| US957,308 | 1992-10-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1085654A true CN1085654A (en) | 1994-04-20 |
| CN1034440C CN1034440C (en) | 1997-04-02 |
Family
ID=25499401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93118623A Expired - Lifetime CN1034440C (en) | 1992-10-06 | 1993-10-06 | Improved shock tube structures |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPH06316480A (en) |
| CN (1) | CN1034440C (en) |
| AU (1) | AU674868B2 (en) |
| CA (1) | CA2107022A1 (en) |
| MY (1) | MY109873A (en) |
| NZ (1) | NZ248658A (en) |
| ZA (1) | ZA936930B (en) |
| ZW (1) | ZW12693A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5597973A (en) * | 1995-01-30 | 1997-01-28 | The Ensign-Bickford Company | Signal transmission fuse |
| US5827994A (en) * | 1996-07-11 | 1998-10-27 | The Ensign-Bickford Company | Fissile shock tube and method of making the same |
| DE102018125303A1 (en) * | 2018-10-12 | 2020-04-16 | Rheinmetall Waffe Munition Gmbh | Igniter and ammunition |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE446860B (en) * | 1978-08-08 | 1986-10-13 | Nitro Nobel Ab | LAGENERGISTUBIN CONSISTS OF A PLASTIC HOSE WHICH HAVE BEEN COVERED WITH POWDER FORM |
| US4493261A (en) * | 1983-11-02 | 1985-01-15 | Cxa Ltd./Cxa Ltee | Reinforced explosive shock tube |
| US4607573A (en) * | 1984-04-03 | 1986-08-26 | Ensign-Bickford Industries, Inc. | Laminated fuse and manufacturing process therefor |
-
1993
- 1993-09-13 AU AU46291/93A patent/AU674868B2/en not_active Withdrawn - After Issue
- 1993-09-14 NZ NZ248658A patent/NZ248658A/en unknown
- 1993-09-20 ZA ZA936930A patent/ZA936930B/en unknown
- 1993-09-23 ZW ZW12693A patent/ZW12693A1/en unknown
- 1993-09-27 CA CA002107022A patent/CA2107022A1/en not_active Abandoned
- 1993-10-04 JP JP5248161A patent/JPH06316480A/en active Pending
- 1993-10-05 MY MYPI93002027A patent/MY109873A/en unknown
- 1993-10-06 CN CN93118623A patent/CN1034440C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU4629193A (en) | 1994-04-21 |
| CN1034440C (en) | 1997-04-02 |
| ZA936930B (en) | 1994-05-16 |
| CA2107022A1 (en) | 1994-04-07 |
| NZ248658A (en) | 1996-01-26 |
| JPH06316480A (en) | 1994-11-15 |
| ZW12693A1 (en) | 1994-06-01 |
| AU674868B2 (en) | 1997-01-16 |
| MY109873A (en) | 1997-09-30 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: IMPERIAL CHEMICAL INDUSTRIES (CANADA) CO., LTD. TO: ORICA EXPLOSIVE TECH. PTY LTD. |
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| CP03 | Change of name, title or address |
Address after: Australia Victoria Patentee after: Orica Explosive Tech. PTY Ltd. Address before: Ontario, Canada Patentee before: ICI Canada Inc. |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131006 Granted publication date: 19970402 |