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Single-layer high-reliability detonating tube and preparation method thereof

A detonating tube and reliability technology, which is applied in the field of single-layer high-reliability detonating tubes and their preparation, can solve problems such as breakdown, potential safety hazards, blind shots, etc., and achieves low manufacturing cost, easy acquisition, and breakdown resistance. powerful effect

Inactive Publication Date: 2018-09-28
CHINA GEZHOUBA GRP YIPULI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main raw material used in domestic production of ordinary detonators is low-density polyethylene LDPE (such as Yanshan Petrochemical 1I2A and Daqing Petrochemical 18D 0 type), due to its low price and good product performance, it has been widely promoted and used by nonel manufacturers, but blind shots and breakdowns often occur in the application process, which brings serious safety hazards to construction

Method used

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  • Single-layer high-reliability detonating tube and preparation method thereof

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Embodiment 1

[0026] Embodiment 1 prepares nonel of the present invention

[0027] The components and ratios of the raw materials for preparing the nonel of the present invention are as follows: the percentage of low-density polyethylene accounting for the total raw material mass is 40% to 60%, and the percentage of linear low-density polyethylene accounting for the total raw material mass is 30% to 50%. %, ethylene copolymer accounts for 5% to 20% of the total raw material mass. The density of linear low density polyethylene is 0.915~0.920g / cm 3 , Melt index in 2 ~ 5g / 10min. The ethylene copolymer is one or more mixtures of ionomers of ethylene-vinyl acetate copolymer (EVA) or ethylene-acrylate copolymer (EMA) or ethylene acrylic acid copolymer (EAA). The AA content in EAA is less than 10%, the VA content in EVA is less than 5%, and the MA content in EMA is less than 10%.

[0028] Follow the steps below to operate (the process flow is as follows figure 1 shown):

[0029] A single-laye...

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Abstract

The present invention discloses a single-layer high-reliability detonating tube. The detonating tube is prepared from the following components as raw materials in mass percent: low-density polyethylene 40%-60%, linear low-density polyethylene 30%-50%, ethylene copolymer 5%-20%. The present invention further discloses a preparation method of the detonating tube, comprising: (1) feeding the raw materials into an extruder for plasticization according to the formula and extruding into a tube blank through a bush die of the extruder; (2) adhering powder in a hole of an extruder die mandrel to the inner wall of the tube blank by means of a pneumatic device; (3) cooling the tube blank for shaping and drying the tube blank for water removal; (4) carrying out plastic stretching treatment on the tube blank; (5) performing annealing treatment on the tube blank; (6) cooling the annealed tube blank for shaping to form a detonating tube; and (7) rolling. The detonating tube of the present inventionhas the advantages of excellent powder adhesion, high detonation propagation reliability, high breakdown resistance with a tension of up to 15 KG, and the like.

Description

technical field [0001] The invention belongs to the technical field of civil blasting equipment, and in particular relates to a single-layer high-reliability detonating tube and a preparation method thereof. Background technique [0002] The detonating tube has the advantages of good antistatic performance, easy construction and high integrity, and is widely used in the field of engineering blasting. At present, the main raw material used in domestic production of ordinary detonators is low-density polyethylene LDPE (such as Yanshan Petrochemical 1I2A and Daqing Petrochemical 18D 0 type), due to its low price and good product performance, it is widely used by nonel manufacturers, but blind shots and breakdowns often occur in the application process, which brings serious safety hazards to construction. With the development of the detonator industry, relevant departments and application environments put forward higher requirements on the performance of the detonator, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08
CPCC08L23/0815C08L23/06C08L2203/18C08L2205/03C08L2205/035C08L2207/066
Inventor 李俊杰陈文基刘庆郝亚飞周桂松杜华善
Owner CHINA GEZHOUBA GRP YIPULI CO LTD
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