CN107285969A - It is a kind of for green gas generant composition in accordance of safety belt pretensioner and preparation method thereof - Google Patents
It is a kind of for green gas generant composition in accordance of safety belt pretensioner and preparation method thereof Download PDFInfo
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- CN107285969A CN107285969A CN201710546922.6A CN201710546922A CN107285969A CN 107285969 A CN107285969 A CN 107285969A CN 201710546922 A CN201710546922 A CN 201710546922A CN 107285969 A CN107285969 A CN 107285969A
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- gas generant
- generant composition
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
- C06B29/16—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with a nitrated organic compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
-
- 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
-
- 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
- C06B21/0033—Shaping the mixture
- C06B21/0075—Shaping the mixture by extrusion
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
- C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
It is composed of the following components according to mass percent the invention discloses a kind of green gas generant composition in accordance for safety belt pretensioner：10%~20% fuel agent, 5%~10% adhesive, 70%~85% oxidant, the mass percent summation of above each component is 100%.The invention also discloses the preparation method of the gas generant composition in accordance, fuel agent, adhesive, oxidant and solvent are added in kneader and are kneaded into bolus, then bolus is squeezed into by medicinal strip using plunger type extruding, medicinal strip is dried again and powder is cut into, powder sieving is removed into damaged powder and powder, complete uniform powder is obtained, finally drying obtains the gas generant composition in accordance.Solve existing gas generant composition in accordance and the problem of gas componant is exceeded is produced after combustion.
Description
Technical field
The invention belongs to auto-safety mechanism technical field, and in particular to a kind of green aerogenesis for safety belt pretensioner
Medicine, has further related to the preparation method of the above-mentioned green gas generant composition in accordance for safety belt pretensioner.
Background technology
Automobile passive safety system includes safe vehicle body (GOA vehicle bodies), safety belt and safety belt pre-tightening device, substitute
Capsule, automobile specified modulate safely glass, steering column energy absorbing device.When occurring dangerous accident, car belt pretension
Device is that passive safety system auxiliary completes to reduce the important component of occupant injury.Peace is wrapped in automotive safety spool of tape
Full band ribbon, ribbon can be reclaimed when occupant wears by coiler, therefore reeler spool being capable of bidirectional rotary during normal condition
Turn.In motion, crash sensor (Sensor) constantly sends the information of acceleration to automobile to ECU (ECU), simultaneously
Analysis judgement is carried out to these information, system thinks to collide when setting threshold values more than ECU, and ignition signal is sent immediately
To trigger gas generator ignition system.Air bag is in very short time, and the cover lid on break through direction disk expands rapidly expansion,
Stop the collision between occupant and automobile interiors, it is to avoid or slow down secondary collision.Preloader safety belt gas is sent out simultaneously
Raw device is had an effect generation power, and retractor spool is transmitted to by transmission mechanism, spool drive ribbon rotate toward the direction tightened up and
Pretension function is realized, reduces occupant and significantly leans forward, then slow down occupant's head and deploy air bag or vapour
Car upholstery or the collision of parts, further increase protecting effect of the passive safety system to member.
Gas generator is the core of passive safety system, and gas producing medicinal is the key technology of gas generator, gas
The performance and structure of body generator depend primarily on the performance of gas-forming agent, so more researchers and enterprise of universities and colleges
Turn one's attention to the development of gas-forming agent.
Safety belt pretensioner is rapid after being had an effect with gas generator to produce gases at high pressure, promotes ball or bar tooth to make
Spool is overturn.It is compact and function on is constrained rapidly by its structural volume, it is desirable to which that safety belt pretensioner gas generant composition in accordance must have
Gas production is big, reliability is high, gas is nontoxic, corrosivity it is small with without solid remaining years into etc. characteristic.
The application of Composition of Sodium Azide Gas Generant relatively morning and technique is more ripe, but itself has hypertoxicity；Nitrocellulose
Element is widely used in firearms as propellant powder, but the early stage processing of raw material is relatively complicated, and the requirement to equipment is higher, produces work
Skill is complicated, and the heat endurance of medicament in itself is poor, while its main component oxygen balance is negative oxygen, an oxygen is mainly generated during combustion
Change carbon and carbon dioxide, carbon monoxide may cause secondary injury to occupant；Air bag is big with gas-forming agent volume, and
And can produce solid residue after burning.It requires a kind of raw material sources of development it is extensive, cheap, can technology production,
With certain sensitivity and performance, toxic and harmful gas composition and solid are produced after small volume, factor of created gase height, performance stabilization, burning
Residue green gases propellant as few as possible is imperative.
The content of the invention
It is an object of the invention to provide a kind of green gas generant composition in accordance for safety belt pretensioner, solve existing gas generant composition in accordance and exist
The problem of gas componant is exceeded is produced after combustion.
It is a further object to provide the preparation method of the green gas generant composition in accordance for safety belt pretensioner.
To achieve the above object, the first technical scheme of the present invention is, a kind of for the green of safety belt pretensioner
Color gas generant composition in accordance, it is composed of the following components according to mass percent：10%~20% fuel agent, 5%~10% adhesive,
70%~85% oxidant, the mass percent summation of above each component is 100%.
Preferably, fuel agent is the 5- Aminotetrazoles that particle mean size is not more than 10 μm.
Preferably, adhesive is hydroxypropyl methyl cellulose, Hydroxypropyl ethyl cellulose, carboxymethyl cellulose or carboxymethyl
One or more of arbitrary proportion mixtures in sodium cellulosate.
Preferably, oxidant is one or more of arbitrary proportion mixtures in potassium hyperchlorate, potassium nitrate or guanidine nitrate.
Second of technical scheme of the present invention is a kind of preparation of the green gas generant composition in accordance for safety belt pretensioner
Method, the gas generant composition in accordance is composed of the following components according to mass percent：10%~20% fuel agent, 5%~10% it is viscous
Mixture, 70%~85% oxidant, the mass percent summation of above each component is 100%；
Preparation method comprises the following steps：Weigh each component according to aforementioned proportion, by fuel agent, adhesive, oxidant and
Solvent adds in kneader and is kneaded into bolus, bolus then is squeezed into medicinal strip using plunger type extruding, then medicinal strip is dried simultaneously
Powder is cut into, powder sieving is removed into damaged powder and powder, complete uniform powder is obtained, finally drying obtains the aerogenesis
Medicine.
When being mediated in kneader, it can be mediated for a period of time, sequentially added flammable with solvent using adhesive is first added
Agent and oxidant, continue to be kneaded into bolus；Solvent and oxidant first can also be mediated into a period of time, then added in batch mixing
The adhesive of dry-mixed mistake, fuel agent in machine, continue to be kneaded into bolus.
Preferably, solvent is water and organic solvent with 2~5:The mixed liquor that 1 volume ratio is mixed, organic solvent is second
Alcohol, the quality of solvent accounts for fuel agent, adhesive, the 15-25% of oxidant quality summation.
Preferably, fuel agent is the 5- Aminotetrazoles that particle mean size is not more than 10 μm；Described adhesive is hydroxypropyl methyl
One or more of arbitrary proportions in cellulose, Hydroxypropyl ethyl cellulose, carboxymethyl cellulose or sodium carboxymethylcellulose
Mixture；The oxidant is one or more of arbitrary proportion mixtures in potassium hyperchlorate, potassium nitrate or guanidine nitrate.
Preferably, medicinal strip is shaped as solid cylinder or hollow cylinder, if solid cylinder, then solid cylinder is a diameter of
1.0~3.0mm；If hollow cylinder, then hollow cylinder internal diameter is 0.5~1.0mm, and external diameter is 2.0~3.0mm.
Preferably, the condition dried be temperature at 10 DEG C -40 DEG C, humidity is 35-70%, and the airing time is 0.5-2 hours；
The condition of the drying is 80 DEG C of drying temperature, drying time 12 hours.
The beneficial effects of the invention are as follows：
(1) the green gas generant composition in accordance for safety belt pretensioner of the invention, its each component is affected by temperature smaller, fuel agent
5- Aminotetrazoles can provide abundant nitrogen, and adhesive hydroxypropyl methyl cellulose has good film forming, with this work every
Absciss layer is greatly improved the stability of medicament, and perchlorate can provide abundant oxygen, it is ensured that stable burning, guanidine nitrate is used as oxygen
Agent, can produce nitrogen while deflagration；The composition of this gas generant composition in accordance disclosure satisfy that micro gas generator aerogenesis pressure
It is required that.The high/low temperature curve that can be seen that medicament of the present invention from P-t curves in follow-up functional test is basically identical, passes through
Substantial amounts of experimental data accumulation analysis can be seen that low temperature and high-temperature-phase ratio normal temperature difference in 1~2Mpa.
(2) the green gas generant composition in accordance for safety belt pretensioner of the invention, determines formula close to zero oxygen by theoretical calculation
Balance, carries out safety belt gas composition test, from the point of view of determination data, the gas componant of the green gas generant composition in accordance meets USCAR-
24-2 requirement.
(3) the green gas generant composition in accordance for safety belt pretensioner of the invention uses extruded type medicinal strip pelletizing.It is fine compared to nitrification
Raw material disposal is simple for the preparation of the plain class gas generant composition in accordance of dimension, and process is few, workable, and process is simple；Compared to plasticity extrusion
Formula pelletizing, in kneading process need not to pot use due to or heating water bath, sleeve and mould need not be added during extrusion
Heat.Green gas generant composition in accordance raw material disposal is simple, and kneading time section step is strong, and sequencing production management can be achieved, can be in normal temperature
Its preparation is completed in environment, the production security of existing gas generant composition in accordance, suitable mass production is improved.
Brief description of the drawings
Fig. 1 is the preparation method embodiment 1 and embodiment 2 of a kind of green gas generant composition in accordance for safety belt pretensioner of the invention
Flow chart；
Fig. 2 is a kind of flow chart of the preparation method embodiment 3 of green gas generant composition in accordance for safety belt pretensioner of the invention；
Fig. 3 is the comparison diagram of P-T curves before and after single-base gun propellant is tested by high temperature ageing；
Fig. 4 is that the gas generant composition in accordance of the present invention tests the comparison diagram of front and rear P-T curves by high temperature ageing.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
The invention provides a kind of green gas generant composition in accordance for safety belt pretensioner, according to mass percent by following components
Composition：10%~20% fuel agent, 5%~10% adhesive, 70%~85% oxidant, the quality of above each component
Percentage summation is 100%.
Preferably, fuel agent is the 5- Aminotetrazoles that particle mean size is not more than 10 μm.
Preferably, adhesive is hydroxypropyl methyl cellulose, Hydroxypropyl ethyl cellulose, carboxymethyl cellulose or carboxymethyl
One or more of arbitrary proportion mixtures in sodium cellulosate.
Preferably, oxidant is one or more of arbitrary proportion mixtures in potassium hyperchlorate, potassium nitrate or guanidine nitrate.
Present invention also offers the preparation method of the above-mentioned green gas generant composition in accordance for safety belt pretensioner, the gas generant composition in accordance is pressed
It is composed of the following components according to mass percent：10%~20% fuel agent, 5%~10% adhesive, 70%~85%
Oxidant, the mass percent summation of above each component is 100%；
Preparation method comprises the following steps：Weigh each component according to aforementioned proportion, by fuel agent, adhesive, oxidant and
Solvent adds in kneader and is kneaded into bolus, bolus then is squeezed into medicinal strip using plunger type extruding, then medicinal strip is dried simultaneously
Powder is cut into, powder sieving is removed into damaged powder and powder, complete uniform powder is obtained, finally drying obtains the aerogenesis
Medicine.
When being mediated in kneader, it can be mediated for a period of time, sequentially added flammable with solvent using adhesive is first added
Agent and oxidant, continue to be kneaded into bolus, as shown in Figure 1；Solvent and oxidant first can also be mediated into a period of time, Ran Houzai
The adhesive of dry-mixed mistake, fuel agent in batch mixer are added, continues to be kneaded into bolus, as shown in Figure 2.
Wherein, solvent is water and organic solvent with 2~5:The mixed liquor that 1 volume ratio is mixed, organic solvent is ethanol,
The quality of solvent accounts for fuel agent, adhesive, the 15-25% of oxidant quality summation.
Medicinal strip is shaped as solid cylinder or hollow cylinder, if solid cylinder, then solid cylinder a diameter of 1.0~
3.0mm；If hollow cylinder, then hollow cylinder internal diameter is 0.5~1.0mm, and external diameter is 2.0~3.0mm.
In preparation process, the condition dried be temperature at 10 DEG C -40 DEG C, humidity is 35-70%, and the airing time is 0.5-2
Hour；The condition of the drying is 80 DEG C of drying temperature, drying time 12 hours.
It is pre- that the green gas generant composition in accordance for safety belt pretensioner of the present invention loads car belt when in use, by gas generant composition in accordance
The micro gas generator of tight device, the gas generant composition in accordance of loading can be same specification in hollow or solid or two kinds in different size
Or it is two or more.
Illustrate the performance of the gas generant composition in accordance of the present invention with reference to table 1,2 and Fig. 3, Fig. 4.
Table 1 is that certain single-base gun propellant assembles the quick-fried test gas composition measurement of MGG closed bomb vessel points, from the point of view of testing result
Carbon monoxide content exists beyond indication range close to USCAR24-2 index request, endangers the wind of member's health and life
Danger.
Table 1
Table 2 is the gas generant composition in accordance assembling quick-fried test gas composition measurement of MGG closed bomb vessel points of the present invention, is come from testing result
See that indices are satisfied by USCAR24-2 requirement, member's life security can be effectively protected.
Table 2
Fig. 3 is that certain single-base gun propellant assembles P-t curve maps of the MGG after normal temperature and 107 DEG C × 408h, can from figure
Go out, corresponding Curves Pressure rises unstable, surge pressure difference under certain single-base gun propellant assembling two kinds of condition of different temperatures of MGG
10MPa or so, time to peak difference 2ms or so, in the case of long storage and extreme environment, the safety and reliability meeting of product
Influenceed by certain, cause belt with pre-load device function reduction.
Fig. 4 is P-t curve map of the medicament of the present invention after normal temperature and 107 DEG C × 408h, it can be seen that of the invention
Corresponding Curves Pressure rises steady, surge pressure difference 1MPa or so, peak value under medicament assembling two kinds of condition of different temperatures of MGG
Time phase difference 1ms or so, ensure that product in long storage and the safety and reliability of extreme environment situation, it is ensured that prefastening
The output function of safety belt.
Embodiment 1
The green gas generant composition in accordance of this example, including potassium hyperchlorate 49%, particle diameter are less than 5 μm of ultra-fine guanidine nitrate 29%, are averaged
5- Aminotetrazole 15% and hydroxypropyl methyl cellulose 7% of the granularity below 10 μm.
The preparation process of the gas generant composition in accordance is as shown in figure 1, be：
Weigh 5- ammonia of the ultra-fine guanidine nitrate 29%, particle mean size of potassium hyperchlorate 49%, particle diameter less than 5 μm below 10 μm
Base tetrazolium 15% and hydroxypropyl methyl cellulose 7%.Potassium hyperchlorate is carrying out ball using preceding needing to add a certain amount of silica
Honed sieve processing, is pre-processed, it is ensured that the uniformity of material to irregular crystal shape.
The first step：Mediate
Potassium hyperchlorate and guanidine nitrate are respectively divided into two parts of equivalent, first by hydroxypropyl methyl cellulose and solvent (water and
Ethanol volume ratio is 3：1) pour into and more than 20min is mediated in horizontal kneading machine, check record material state and temperature of boiler, material
Temperature and cooling temperature of circulating water (can mediate delay, temperature of charge and temperature of boiler rise can be by setting according to material situation
Put cooling circulating water regulation), then add 5- Aminotetrazoles and mediate more than 20min, check record material state and temperature of boiler,
Temperature of charge and cooling temperature of circulating water, add first part of guanidine nitrate and mediate more than 20min, are adding second part of guanidine nitrate
More than 20min is mediated, the feeding method with guanidine nitrate is added in potassium hyperchlorate, whole process and can fitted according to the kneading state of material
When delay and add solvent, and control material temperature below 40 DEG C, is finally prepared to dough or size is homogeneous all the time
Small bulk.
Second step：Extrusion
By well mixed bolus, pressurize in mould is put into, is extruded using plunger type, the pressure requirements of extrusion are more than
Pressurize is carried out before 1.0MPa, extrusion, the dwell time is controlled in more than 5min, is squeezed into Ф 2.0mm solid medicinal strip, extrusion
During to control the speed of conveyer belt, it is ensured that medicinal strip is used on a moving belt without accumulating and be stretched every 1000mm to 1500mm
Scissors is neatly cut.
3rd step：Dry in the air medicine
Ensure to dry in the air neat and tidy between medicine, and temperature control is at 10 DEG C to 40 DEG C between the medicine that dries in the air, and humid control will be cut below 70%
The medicinal strip both sides that cut are isometric to be hung on stainless-steel pipe and is put into and dry in the air on medicine frame or divide on clean brown paper.Interval
5min checks medicinal strip state, makes medicinal strip expelling water to 20~30 5~10s of medicinal strip are held, medicinal strip scatters without viscous therewith after loosing one's grip
Even, while there is certain mechanical strength, without obvious deformation.
4th step：Slitting
Medicinal strip is neatly laid on explosive wastewater cutting machine delivery platform, cut by the parameter setting on switch board to adjust
The length of medicine, it is respectively two kinds of specifications of 1.8mm and 2.0mm that length, which is respectively cut, in medicinal strip by the present embodiment.Medicine cutter is stable
Afterwards, it is necessary to check the regularity for cutting the powder edge of a knife between medicine into cutting, need to dry medicinal strip again if necessary or again
Put medicinal strip and change cutting knife；With slide measure to particle random measurement 10~20 in receiver, need if necessary pair and medicine
Parameter is reset.Above method can be avoided because medicinal strip puts irregular or cutting knife rust, cause the inclination of powder tangent plane, medicine
Grain surface fracture and powder residue increase, while being able to ensure that the tangent plane of powder is neat, powder specification is homogeneous, so that it is guaranteed that medicament
Performance it is stable.
5th step：Screening
Hand strap kid gloves is behind protective plate with 10 mesh standard sieve net (2.00mm), three sieving receiver specification 2.0mm
Particle, screen out bulky grain and small medicinal strip, screening level is swung, and amplitude is sequentially reduced, again with 12 mesh standard sieve nets (1.7mm)
Take and damaged powder and powder are screened out on screen cloth.
6th step：Drying
The powder screened is divided on drip pan, and processing is dried in below 5mm in control thickness in an oven, dries
Temperature is in 80 DEG C, drying time more than 12 hours.
Embodiment 2
The green gas generant composition in accordance of this example, including potassium hyperchlorate 50%, guanidine nitrate 27%, particle mean size the 5- below 10 μm
Aminotetrazole 15% and sodium carboxymethylcellulose 8.0%.
The preparation process of the gas generant composition in accordance is as shown in figure 1, be：
Weigh the 5- Aminotetrazoles 15% and carboxylic first of potassium hyperchlorate 50%, guanidine nitrate 25%, particle mean size below 10 μm
Base sodium cellulosate 8.0%.Potassium hyperchlorate is carrying out ball milling sieving processing using preceding needing to add a certain amount of silica, to not advising
Crystal shape pretreatment then, it is ensured that the uniformity of material.
The first step：Mediate
Potassium hyperchlorate and guanidine nitrate are respectively divided into two parts of equivalent, first by sodium carboxymethylcellulose and solvent (water and second
Alcohol volume ratio is 5：1) pour into and more than 20min is mediated in horizontal kneading machine, check record material state and temperature of boiler, material temperature
Degree and cooling temperature of circulating water (can mediate delay, temperature of charge and temperature of boiler rise can be by setting according to material situation
Cooling circulating water is adjusted), then add 5- Aminotetrazoles and mediate more than 20min, check record material state and temperature of boiler, thing
Material temperature degree and cooling temperature of circulating water, add first part of guanidine nitrate and mediate more than 20min, are pinched adding second part of guanidine nitrate
More than 20min is closed, the feeding method with guanidine nitrate adds potassium hyperchlorate, can be appropriate according to the kneading state of material in whole process
Delay and add solvent, and control material temperature below 40 DEG C, is finally prepared to dough or uniform all the time
Small bulk.
Second step：Extrusion
By well mixed bolus, pressurize in mould is put into, is extruded using plunger type, the pressure requirements of extrusion are more than
Pressurize is carried out before 1.0MPa, extrusion, the dwell time is controlled in more than 5min, is squeezed into Ф 2.0mm solid medicinal strip, extrusion
During to control the speed of conveyer belt, it is ensured that medicinal strip is used on a moving belt without accumulating and be stretched every 1000mm to 1500mm
Scissors is neatly cut.
3rd step：Dry in the air medicine
Ensure to dry in the air neat and tidy between medicine, and temperature control is at 10 DEG C to 40 DEG C between the medicine that dries in the air, and humid control will be cut below 70%
The medicinal strip both sides that cut are isometric to be hung on stainless-steel pipe and is put into and dry in the air on medicine frame or divide on clean brown paper.Interval
5min checks medicinal strip state, makes medicinal strip expelling water to 20~30 5~10s of medicinal strip are held, medicinal strip scatters without viscous therewith after loosing one's grip
Even, while there is certain mechanical strength, without obvious deformation.
4th step：Slitting
Medicinal strip is neatly laid on explosive wastewater cutting machine delivery platform, cut by the parameter setting on switch board to adjust
The length of medicine, it is respectively two kinds of specifications of 1.8mm and 2.0mm that length, which is respectively cut, in medicinal strip by the present embodiment.Medicine cutter is stable
Afterwards, it is necessary to check the regularity for cutting the powder edge of a knife between medicine into cutting, need to dry medicinal strip again if necessary or again
Put medicinal strip and change cutting knife；With slide measure to particle random measurement 10~20 in receiver, need if necessary pair and medicine
Parameter is reset.Above method can be avoided because medicinal strip puts irregular or cutting knife rust, cause the inclination of powder tangent plane, medicine
Grain surface fracture and powder residue increase, while being able to ensure that the tangent plane of powder is neat, powder specification is homogeneous, so that it is guaranteed that medicament
Performance it is stable.
5th step：Screening
Hand strap kid gloves is behind protective plate with 10 mesh standard sieve net (2.00mm), three sieving receiver specification 1.8mm
Particle, screen out bulky grain and small medicinal strip, screening level is swung, and amplitude is sequentially reduced, again with 14 mesh standard sieve nets (1.4mm)
Take and damaged powder and powder are screened out on screen cloth.
6th step：Drying
The powder screened is divided on drip pan, and processing is dried in below 5mm in control thickness in an oven, dries
Temperature is in 80 DEG C, drying time more than 12 hours.
Embodiment 3
The green gas generant composition in accordance of this example, including potassium hyperchlorate 50%, guanidine nitrate 27%, particle mean size the 5- below 10 μm
Aminotetrazole 15% and sodium carboxymethylcellulose 8.0%.
The preparation process of the gas generant composition in accordance is as shown in Fig. 2 be：
Weigh the 5- Aminotetrazoles 15% and carboxylic first of potassium hyperchlorate 50%, guanidine nitrate 25%, particle mean size below 10 μm
Base sodium cellulosate 8.0%.Potassium hyperchlorate is carrying out ball milling sieving processing using preceding needing to add a certain amount of silica, to not advising
Crystal shape pretreatment then, it is ensured that the uniformity of material.
The first step：Mediate
By it is load weighted by sodium carboxymethylcellulose and 5- Aminotetrazoles or by sodium carboxymethylcellulose and potassium hyperchlorate,
Guanidine nitrate adds dry-mixed more than the 30min of V-type batch mixer, and first by potassium hyperchlorate, guanidine nitrate and solvent, (water and ethanol volume ratio are 3：
1) or by 5- Aminotetrazoles and solvent (water and ethanol volume ratio are 3：1) horizontal kneading machine is added, then the first step is mixed
Good material input kneader mediate in 5min to 25min, whole process can according to the delay of the kneadings state of material suitably and plus
Enter solvent, and control material temperature below 40 DEG C, is finally prepared to dough all the time.
Second step：Extrusion
By well mixed bolus, pressurize in mould is put into, is extruded using plunger type, the pressure requirements of extrusion are more than
Pressurize is carried out before 1.0MPa, extrusion, the dwell time is controlled in more than 5min, is squeezed into Ф 2.0mm solid medicinal strip, extrusion
During to control the speed of conveyer belt, it is ensured that medicinal strip is used on a moving belt without accumulating and be stretched every 1000mm to 1500mm
Scissors is neatly cut.
3rd step：Dry in the air medicine
Ensure to dry in the air neat and tidy between medicine, and temperature control is at 10 DEG C to 40 DEG C between the medicine that dries in the air, and humid control will be cut below 70%
The medicinal strip both sides that cut are isometric to be hung on stainless-steel pipe and is put into and dry in the air on medicine frame or divide on clean brown paper.Interval
5min checks medicinal strip state, makes medicinal strip expelling water to 20~30 5~10s of medicinal strip are held, medicinal strip scatters without viscous therewith after loosing one's grip
Even, while there is certain mechanical strength, without obvious deformation.
4th step：Slitting
Medicinal strip is neatly laid on explosive wastewater cutting machine delivery platform, cut by the parameter setting on switch board to adjust
The length of medicine, it is respectively two kinds of specifications of 1.8mm and 2.0mm that length, which is respectively cut, in medicinal strip by the present embodiment.Medicine cutter is stable
Afterwards, it is necessary to check the regularity for cutting the powder edge of a knife between medicine into cutting, need to dry medicinal strip again if necessary or again
Put medicinal strip and change cutting knife；With slide measure to particle random measurement 10~20 in receiver, need if necessary pair and medicine
Parameter is reset.Above method can be avoided because medicinal strip puts irregular or cutting knife rust, cause the inclination of powder tangent plane, medicine
Grain surface fracture and powder residue increase, while being able to ensure that the tangent plane of powder is neat, powder specification is homogeneous, so that it is guaranteed that medicament
Performance it is stable.
5th step：Screening
Hand strap kid gloves is behind protective plate with 10 mesh standard sieve net (2.00mm), three sieving receiver specification 1.8mm
Particle, screen out bulky grain and small medicinal strip, screening level is swung, and amplitude is sequentially reduced, again with 14 mesh standard sieve nets (1.4mm)
Take and damaged powder and powder are screened out on screen cloth.
6th step：Drying
The powder screened is divided on drip pan, and processing is dried in below 5mm in control thickness in an oven, dries
Temperature is in 80 DEG C, drying time more than 12 hours.
Embodiment 4
The green gas generant composition in accordance of this example, including it is oxidant 70% (wherein, potassium hyperchlorate 50%, guanidine nitrate 27%), flammable
Agent 20% (5- Aminotetrazole 20% of the particle mean size below 10 μm) and adhesive 10% (sodium carboxymethylcellulose 10%).
The preparation process of the gas generant composition in accordance is as shown in Fig. 2 be：
Weigh oxidant 70% (wherein, potassium hyperchlorate 50%, guanidine nitrate 27%), (particle mean size is in 10 μ for fuel agent 20%
Below m 5- Aminotetrazoles 20%) and adhesive 10% (sodium carboxymethylcellulose 10%).Potassium hyperchlorate using preceding needing plus
Enter a certain amount of silica and carry out ball milling sieving processing, irregular crystal shape is pre-processed, it is ensured that the uniformity of material.
The first step：Mediate
By load weighted adhesive and fuel agent or by adhesive and oxidant add the dry-mixed 30min of V-type batch mixer with
On, first by oxidant and solvent, (water and ethanol volume ratio are 2：1) or by fuel agent and solvent (water and ethanol volume ratio are 2：
1) horizontal kneading machine is added, the material input kneader for then mixing the first step is mediated can in 5min to 25min, whole process
According to the appropriate delay of the kneading state of material and solvent is added, and control material temperature below 40 DEG C, is finally prepared all the time
Into dough.
Second step：Extrusion
By well mixed bolus, pressurize in mould is put into, is extruded using plunger type, the pressure requirements of extrusion are more than
Pressurize is carried out before 1.0MPa, extrusion, the dwell time is controlled in more than 5min, is squeezed into Ф 2.0mm solid medicinal strip, extrusion
During to control the speed of conveyer belt, it is ensured that medicinal strip is used on a moving belt without accumulating and be stretched every 1000mm to 1500mm
Scissors is neatly cut.
3rd step：Dry in the air medicine
Ensure to dry in the air neat and tidy between medicine, and temperature control is at 10 DEG C to 40 DEG C between the medicine that dries in the air, and humid control will be cut below 70%
The medicinal strip both sides that cut are isometric to be hung on stainless-steel pipe and is put into and dry in the air on medicine frame or divide on clean brown paper.Interval
5min checks medicinal strip state, makes medicinal strip expelling water to 20~30 5~10s of medicinal strip are held, medicinal strip scatters without viscous therewith after loosing one's grip
Even, while there is certain mechanical strength, without obvious deformation.
4th step：Slitting
Medicinal strip is neatly laid on explosive wastewater cutting machine delivery platform, cut by the parameter setting on switch board to adjust
The length of medicine, it is respectively two kinds of specifications of 1.8mm and 2.0mm that length, which is respectively cut, in medicinal strip by the present embodiment.Medicine cutter is stable
Afterwards, it is necessary to check the regularity for cutting the powder edge of a knife between medicine into cutting, need to dry medicinal strip again if necessary or again
Put medicinal strip and change cutting knife；With slide measure to particle random measurement 10~20 in receiver, need if necessary pair and medicine
Parameter is reset.Above method can be avoided because medicinal strip puts irregular or cutting knife rust, cause the inclination of powder tangent plane, medicine
Grain surface fracture and powder residue increase, while being able to ensure that the tangent plane of powder is neat, powder specification is homogeneous, so that it is guaranteed that medicament
Performance it is stable.
5th step：Screening
Hand strap kid gloves is behind protective plate with 10 mesh standard sieve net (2.00mm), three sieving receiver specification 1.8mm
Particle, screen out bulky grain and small medicinal strip, screening level is swung, and amplitude is sequentially reduced, again with 14 mesh standard sieve nets (1.4mm)
Take and damaged powder and powder are screened out on screen cloth.
6th step：Drying
The powder screened is divided on drip pan, and processing is dried in below 5mm in control thickness in an oven, dries
Temperature is in 80 DEG C, drying time more than 12 hours.
Embodiment 5
The green gas generant composition in accordance of this example, including it is oxidant 85% (wherein, potassium hyperchlorate 50%, guanidine nitrate 35%), flammable
Agent 10% (5- Aminotetrazole 10% of the particle mean size below 10 μm) and adhesive 5% (sodium carboxymethylcellulose 5%).
The preparation process of the gas generant composition in accordance is as shown in Fig. 2 be：
Weigh oxidant 85% (wherein, potassium hyperchlorate 50%, guanidine nitrate 35%), (particle mean size is in 10 μ for fuel agent 10%
Below m 5- Aminotetrazoles 10%) and adhesive 5% (sodium carboxymethylcellulose 5%).Potassium hyperchlorate using preceding need add
A certain amount of silica carries out ball milling sieving processing, irregular crystal shape is pre-processed, it is ensured that the uniformity of material.
The first step：Mediate
By load weighted adhesive and fuel agent or by adhesive and oxidant add the dry-mixed 30min of V-type batch mixer with
On, first by oxidant and solvent, (water and ethanol volume ratio are 5：1) or by fuel agent and solvent (water and ethanol volume ratio are 5：
1) horizontal kneading machine is added, the material input kneader for then mixing the first step is mediated can in 5min to 25min, whole process
According to the appropriate delay of the kneading state of material and solvent is added, and control material temperature below 40 DEG C, is finally prepared all the time
Into dough.
Second step：Extrusion
By well mixed bolus, pressurize in mould is put into, is extruded using plunger type, the pressure requirements of extrusion are more than
Pressurize is carried out before 1.0MPa, extrusion, the dwell time is controlled in more than 5min, is squeezed into Ф 2.0mm solid medicinal strip, extrusion
During to control the speed of conveyer belt, it is ensured that medicinal strip is used on a moving belt without accumulating and be stretched every 1000mm to 1500mm
Scissors is neatly cut.
3rd step：Dry in the air medicine
Ensure to dry in the air neat and tidy between medicine, and temperature control is at 10 DEG C to 40 DEG C between the medicine that dries in the air, and humid control will be cut below 70%
The medicinal strip both sides that cut are isometric to be hung on stainless-steel pipe and is put into and dry in the air on medicine frame or divide on clean brown paper.Interval
5min checks medicinal strip state, makes medicinal strip expelling water to 20~30 5~10s of medicinal strip are held, medicinal strip scatters without viscous therewith after loosing one's grip
Even, while there is certain mechanical strength, without obvious deformation.
4th step：Slitting
Medicinal strip is neatly laid on explosive wastewater cutting machine delivery platform, cut by the parameter setting on switch board to adjust
The length of medicine, it is respectively two kinds of specifications of 1.8mm and 2.0mm that length, which is respectively cut, in medicinal strip by the present embodiment.Medicine cutter is stable
Afterwards, it is necessary to check the regularity for cutting the powder edge of a knife between medicine into cutting, need to dry medicinal strip again if necessary or again
Put medicinal strip and change cutting knife；With slide measure to particle random measurement 10~20 in receiver, need if necessary pair and medicine
Parameter is reset.Above method can be avoided because medicinal strip puts irregular or cutting knife rust, cause the inclination of powder tangent plane, medicine
Grain surface fracture and powder residue increase, while being able to ensure that the tangent plane of powder is neat, powder specification is homogeneous, so that it is guaranteed that medicament
Performance it is stable.
5th step：Screening
Hand strap kid gloves is behind protective plate with 10 mesh standard sieve net (2.00mm), three sieving receiver specification 1.8mm
Particle, screen out bulky grain and small medicinal strip, screening level is swung, and amplitude is sequentially reduced, again with 14 mesh standard sieve nets (1.4mm)
Take and damaged powder and powder are screened out on screen cloth.
6th step：Drying
The powder screened is divided on drip pan, and processing is dried in below 5mm in control thickness in an oven, dries
Temperature is in 80 DEG C, drying time more than 12 hours.
Claims (9)
1. a kind of green gas generant composition in accordance for safety belt pretensioner, it is characterised in that according to mass percent by following components group
Into：10%~20% fuel agent, 5%~10% adhesive, 70%~85% oxidant, the quality hundred of above each component
It is 100% to divide than summation.
2. a kind of green gas generant composition in accordance for safety belt pretensioner according to claim 1, it is characterised in that described flammable
Agent is the 5- Aminotetrazoles that particle mean size is not more than 10 μm.
3. a kind of green gas generant composition in accordance for safety belt pretensioner according to claim 1, it is characterised in that the bonding
Agent be hydroxypropyl methyl cellulose, Hydroxypropyl ethyl cellulose, carboxymethyl cellulose or sodium carboxymethylcellulose in one kind or
Several arbitrary proportion mixtures.
4. a kind of green gas generant composition in accordance for safety belt pretensioner according to claim 1, it is characterised in that the oxidation
Agent is one or more of arbitrary proportion mixtures in potassium hyperchlorate, potassium nitrate or guanidine nitrate.
5. the preparation method of a kind of green gas generant composition in accordance for safety belt pretensioner, it is characterised in that the gas generant composition in accordance is according to matter
Measure percentage composed of the following components：10%~20% fuel agent, 5%~10% adhesive, 70%~85% oxidation
Agent, the mass percent summation of above each component is 100%；
Preparation method comprises the following steps：Each component is weighed according to aforementioned proportion, by fuel agent, adhesive, oxidant and solvent
Add in kneader and be kneaded into bolus, bolus is then squeezed into by medicinal strip using plunger type extruding, then medicinal strip is dried and is cut into
Powder, damaged powder and powder are removed by powder sieving, obtain complete uniform powder, and finally drying obtains the gas generant composition in accordance.
6. a kind of preparation method of green gas generant composition in accordance for safety belt pretensioner according to claim 5, its feature exists
In the solvent is water and organic solvent with 2~5:The mixed liquor that 1 volume ratio is mixed, organic solvent is ethanol, solvent
Quality accounts for fuel agent, adhesive, the 15-25% of oxidant quality summation.
7. a kind of preparation method of green gas generant composition in accordance for safety belt pretensioner according to claim 5, its feature exists
In the fuel agent is the 5- Aminotetrazoles that particle mean size is not more than 10 μm；Described adhesive is hydroxypropyl methyl cellulose, hydroxyl
One or more of arbitrary proportion mixtures in ethyl cellulose, carboxymethyl cellulose or sodium carboxymethylcellulose；Institute
It is one or more of arbitrary proportion mixtures in potassium hyperchlorate, potassium nitrate or guanidine nitrate to state oxidant.
8. a kind of preparation method of green gas generant composition in accordance for safety belt pretensioner according to claim 5, its feature exists
Be shaped as solid cylinder or hollow cylinder in, the medicinal strip, if solid cylinder, then solid cylinder a diameter of 1.0~
3.0mm；If hollow cylinder, then hollow cylinder internal diameter is 0.5~1.0mm, and external diameter is 2.0~3.0mm.
9. a kind of preparation method of green gas generant composition in accordance for safety belt pretensioner according to claim 5, its feature exists
In, the condition dried be temperature at 10 DEG C -40 DEG C, humidity is 35-70%, and the airing time is 0.5-2 hours；The drying
Condition be 80 DEG C of drying temperature, drying time 12 hours.
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| CN116789506A (en) * | 2023-06-30 | 2023-09-22 | 陕西庆华汽车安全***有限公司 | Gas generating composition for automobile safety belt pretensioner and preparation method thereof |
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