CN105385073B - Flame retardant type polyvinyl chloride plastic grain and preparation method thereof - Google Patents
Flame retardant type polyvinyl chloride plastic grain and preparation method thereof Download PDFInfo
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- CN105385073B CN105385073B CN201511019879.5A CN201511019879A CN105385073B CN 105385073 B CN105385073 B CN 105385073B CN 201511019879 A CN201511019879 A CN 201511019879A CN 105385073 B CN105385073 B CN 105385073B
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- C08K3/20—Oxides; Hydroxides
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- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Abstract
The invention provides a kind of flame retardant type polyvinyl chloride plastic grain and preparation method thereof, belong to plastic applications, by weight, it is by 5 parts~8 parts of stabilizer, 1 part~3 parts of lubricant, 20 parts~40 parts of plasticizer, 100 parts~120 parts of polyvinyl chloride resin powder, 20 parts~30 parts of APP, 5 parts~10 parts of colouring agent, 50 parts~60 parts of filler, 0.2 part~0.5 part of borax, 0.2 part~0.8 part composition of smoke suppressant, the smoke suppressant is molybdenum trioxide and the blend of zinc aluminate.The invention provides a kind of more preferable polyvinyl chloride plastic grain of anti-flammability, the polyvinyl chloride ethene moulds grain in burning, APP forms charring layer on modeling grain surface, completely cut off air, prevent burning, meanwhile smoke suppressant and the hcl reaction generation metal chloride of burning release early stage, the alkylated reaction of catalysis can accordingly reduce the generation of flue gas.The fire protecting performance of polyvinyl chloride is greatly improved, while ensures the personal security in the case of catching fire.
Description
Technical field
The present invention relates to plastic applications, in particular to a kind of flame retardant type polyvinyl chloride plastic grain and preparation method thereof.
Background technology
The thermoplastic resin that polyvinyl chloride is polymerized by vinyl chloride in the presence of initiator, it is the homopolymer of chloroethene,
Ryuron and vinyl chloride copolymer are referred to as vinyl chloride resin.Polyvinyl chloride has a preferable mechanical performance, and anti-tensile is strong
60mpa or so is spent, impact strength 5-10kj/m2, there are excellent dielectric properties, is that a kind of yield is high, widely used general plastic
Material.
Polyvinyl chloride is a kind of combustible, and with widely using for current igelite, security against fire is of crucial importance,
Therefore the flame-retardant modified important topic having become in current industry is carried out to igelite, existing fire retardant is adding
After entering polyvinyl chloride plastic grain, although polyvinyl chloride and air contact can be prevented, certain fire retardation is played, this process
In generated along with a large amount of dense smokes, and as shown by data is in a fire, and cigarette is higher to the fatal rate of people, therefore this kind of anti-flammability is poly-
Vinyl chloride can not ensure the personal safety of the people when fire-fighting accident occurs.
The content of the invention
The invention provides a kind of flame retardant type polyvinyl chloride plastic grain and preparation method thereof, it is intended to improves above-mentioned technical problem.
What the present invention was realized in：
A kind of flame retardant type polyvinyl chloride plastic grain, by weight, by 5 parts~8 parts of stabilizer, 1 part~3 parts of lubricant, increase
20 parts~40 parts of agent of modeling, 100 parts~120 parts of polyvinyl chloride resin powder, 20 parts~30 parts of APP, 5 parts~10 parts of colouring agent,
50 parts~60 parts of filler, 0.2 part~0.5 part of borax, 0.2 part~0.8 part of smoke suppressant composition, the smoke suppressant be molybdenum trioxide and
The blend of zinc aluminate.
Pvc material is a kind of polymer less sensitive to ultraviolet, but is remained in polyvinyl chloride photosensitive miscellaneous
Matter, catalyst residue or other photo sensitive additives will cause the degraded of polyvinyl chloride.Under solar radiation, due to by daylight
In 290-400 nano wave length ultraviolet irradiations, absorb ultraviolet energy, chemical bond destroys, and cause chain reaction, make to gather
Vinyl chloride plastic hydraulic performance decline, such as reduce impact strength or product is changed colour.Ultra-violet absorber is added in formula to be had
Effect ground suppresses light degradation.Therefore in invention, stabilizer used is ultra-violet absorber.
In the technical program, APP is added in polyvinyl chloride plastic grain as fire retardant, when meeting fiery, APP
The charring layer of one layer of expansion can be formed in polyvinyl chloride surface, so that unburned polymer separates with flame and thermal source, it is real
Existing anti-flaming function simultaneously prevents polyvinyl chloride melts to occur outwards dripping from producing droppings, and because APP is meeting fire in itself
When smoke-producing amount it is little, realize more preferable flame retardant effect.
When polyvinyl chloride burns, intensely occur in the inside of material and away from flame end, the cracking and crosslinking of polymer
Competition, secondary response then occurs, hydrocarbon and other flammable products are come out by charring layer, and with surface
Oxygen contacts, and is so possible to just burn or formed black smoke.
The effect of smoke suppressant is phase before combustion, and metal chloride, the alkyl of catalysis are generated with the hcl reaction of release
The generation of flue gas can accordingly be reduced by changing reaction.Molybdenum trioxide (MoO3) and zinc aluminate (ZnAl2O4) it is the very strong metal of oxidisability
Oxide, it is fast with hcl reaction speed, further reduce the generation of flue gas.
It can be formed between molybdenum trioxide and zinc aluminate and compound cooperative effect, the Mo in molybdenum trioxide6+With the Zn in zinc aluminate2 +Crosslinking can be carried out between each other, strengthen Mo2+Oxidisability, further enhance polyvinyl chloride suppression cigarette effect and fire-retardant work
With, compared to be used alone molybdenum trioxide and zinc aluminate it is more preferable as smoke suppressant, smoke suppressing effect and flame retardant effect.
Borax (Na2B4O7.10H2O the crosslinking effect between molybdenum trioxide and zinc aluminate) can be strengthened, strengthen Mo2+
Oxidisability, improve smoke suppressing effect.Proportioning between molybdenum trioxide and zinc aluminate should consider economy and smoke-inhibiting flame retardant effect
Demand depending on.The amount of molybdenum trioxide is more, and corresponding smoke suppressing effect is better, but molybdenum trioxide is expensive, corresponding meeting
Increase cost.
Flame retardant type polyvinyl chloride plastic grain provided by the invention, not only good flame retardation effect, meanwhile, smoke-producing amount in combustion
It is small, the personal safety of people involved in fire disasters person can be ensured to greatest extent.Final obtained flame retardant type polyvinyl chloride plastic grain is fire-retardant
Function admirable, smoke suppressing effect is good, and does not have substantially to performance such as tensile strength, breach buffer intensity etc. of polyvinyl chloride itself
Influence.
Because the smoke-producing amount of the poly- ammonium chlorate as fire retardant in itself is seldom, therefore in the technical program, further, institute
State in smoke suppressant, the mass ratio of molybdenum trioxide and zinc aluminate is 1:2~4.
Preferably, in the smoke suppressant, the mass ratio of molybdenum trioxide and zinc aluminate is 1:3.Under the proportioning, suppression cigarette effect
Fruit is best, and economy is higher.
Preferably, the plasticizer is dioctyl phthalate, diisononyl phthalate and dioctyl adipate
In one or more.
Plasticizer can control polyvinyl chloride soft durometer, increase gloss.
Preferably, the plasticizer is that dioctyl phthalate, diisononyl phthalate and adipic acid two are pungent
The blend of ester.They not with polyvinyl chloride chemically reactive, and polymer interaction mainly when raising temperature
Swelling action, form a kind of solid solution with polymer, increase the gloss of plastics.
Further, by weight, by 6 parts~7 parts of stabilizer, 2 parts of lubricant, 30 parts~35 parts of plasticizer, polychlorostyrene
105 parts~115 parts of vinyl powder, 24 parts~27 parts of APP, 7 parts~9 parts of colouring agent, 53 parts~57 parts of filler, borax
0.3 part~0.4 part, 0.4 part~0.6 part of smoke suppressant composition, the smoke suppressant is molybdenum trioxide and the blend of zinc aluminate, three oxygen
The mass ratio for changing molybdenum and zinc aluminate is 1:3.
The polyvinyl chloride smoke-inhibiting flame retardant effect produced under above-mentioned formula rate is more preferable, under combustion case, smoke-producing amount
It is small.And polyvinyl chloride surface is smooth, the color by adjusting colouring agent can produce the polyvinyl chloride plastic grain of different colours.
Summarized through inventor's long-term practice, preferably, by weight, by 7 parts of stabilizer, 2 parts of lubricant, plasticizer
33 parts, 110 parts of polyvinyl chloride resin powder, 25 parts of APP, 8 parts of colouring agent, 55 parts of filler, 0.4 part of borax, smoke suppressant 0.5
Part composition.In this formula, the flame-retardant smoke inhibition effect of polyvinyl chloride plastic grain and economy are best.
Further, the colouring agent is titanium dioxide.
Further, the lubricant is butyl stearate or stearmide.Lubricant can increase polyvinyl chloride product
Mobility and lubricity, be easy to improve prepare mould grain when speed.
The preparation method of above-mentioned flame retardant type polyvinyl chloride plastic grain：First polyvinyl chloride resin powder and APP and borax are existed
Mixed in homogenizer, melting, maintain 5-10min；
Then plasticizer and smoke suppressant are added, is mixed, maintains 10-20min；
Lubricant, stabilizer and colouring agent are eventually adding, is mixed, maintains 8-15min；Then twin screw extruder is added
Interior extruding pelletization.
First it is sufficiently mixed as the APP of fire retardant with polyvinyl chloride resin powder, plays more preferable fire retardation,
The amount of borax is smaller relative to the amount of polyvinyl chloride resin powder, and it is uniformly scattered in polyvinyl chloride, when plasticizer and suppression cigarette
After agent adds, the hydrone in borax is plasticized agent and partially absorbed, and molybdenum trioxide and zinc aluminate can be adsorbed on borax molecule,
The abundant contact of molybdenum trioxide and zinc aluminate is realized, and strengthens the crosslinking effect of molybdenum trioxide and zinc aluminate, improves Mo2+With
Zn2+Oxidisability, improve smoke suppressing effect, the stable regular hour can improve the effect of crosslinking effect.It is eventually adding
Toner, stabilizer and lubricant, adjustment polyvinyl chloride ethene mould the performances such as the color of grain, photostability.
It should be noted that using traditional polyvinyl chloride plastic grain preparation method, will pass through after the mixing simultaneously of all raw materials
Spring charger adds the mode of twin screw extruder extruding pelletization, and feasible.
Compared with prior art, beneficial effects of the present invention are：A kind of more preferable polyvinyl chloride plastic grain of anti-flammability is provided,
The polyvinyl chloride ethene moulds grain in burning, and APP forms charring layer on modeling grain surface, completely cuts off air, prevents burning, together
When, smoke suppressant and the hcl reaction generation metal chloride of burning release early stage, the alkylated reaction of catalysis can be reduced accordingly
The generation of flue gas.The fire protecting performance of polyvinyl chloride is greatly improved, while ensures the personal security in the case of catching fire.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, it is clear that described embodiment is this
Invention part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Test example
Smoke suppressing effect between contrast molybdenum trioxide, zinc aluminate and molybdenum trioxide and the mixture of zinc aluminate.Experiment side
Method is, the igelite of quality volume such as chooses, be separately added into etc. the zinc aluminate of quality, molybdenum trioxide, molybdenum trioxide and
The mixture of zinc aluminate, molybdenum trioxide, borax and zinc aluminate mixture and be added without smoke suppressant, light polyvinyl chloride plastic
Material, and tested according to ASTME-662 testing standards, sample in the stove of a sealing, radiant heat source amount is 2.5w/cm2.
Whole test 20 minutes, is recorded the 4th minute, the 8th minute, the maximum smoke density value of whole 20 minutes, result of the test was shown in Table 1.
The different smoke suppressant smoke suppressing effect result of the test tables of table 1
In experiment, when smoke suppressant is mixture, each material mass ratio in mixture is tested according to 1.By upper
Table data understand that, by adding smoke suppressant, dense smoke density caused by igelite burning significantly reduces, relative to independent
Using molybdenum trioxide or zinc aluminate as smoke suppressant, the smoke suppressing effect of the mixture of molybdenum trioxide and zinc aluminate is more preferable, produces
Smoke is smaller.After borax is added, the smoke suppressing effect of smoke suppressant is further improved.
Embodiment 1
A kind of flame retardant type polyvinyl chloride plastic grain is present embodiments provided, including 5 parts of stabilizer, 1 part of lubricant, lubricant are
Butyl stearate, 20 parts of plasticizer, plasticizer are dioctyl phthalate, 100 parts of polyvinyl chloride resin powder, APP 20
Part, 5 parts of colouring agent, colouring agent is titanium dioxide, 50 parts of filler, 0.2 part of borax, 0.2 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:2.
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mixed with borax in homogenizer, melting, maintain 5min, then add plasticizer and smoke suppressant, mix, maintain 10min, most
Lubricant, stabilizer and colouring agent are added afterwards, is mixed, and maintain 8min；Then twin screw extruder extruding pelletization is added.
Embodiment 2
Present embodiments provide a kind of flame retardant type polyvinyl chloride plastic grain, including 6 parts of stabilizer, 1.5 parts of lubricant, lubricant
For butyl stearate, 25 parts of plasticizer, plasticizer is diisononyl phthalate, 105 parts of polyvinyl chloride resin powder, polyphosphoric acid
22 parts of ammonium, 6 parts of colouring agent, colouring agent are titanium dioxide, 52 parts of filler, 0.25 part of borax, 0.3 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:
2.5。
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mixed with borax in homogenizer, melting, maintain 6min, then add plasticizer and smoke suppressant, mix, maintain 12min, most
Lubricant, stabilizer and colouring agent are added afterwards, is mixed, maintains 10min, then add twin screw extruder extruding pelletization.
Embodiment 3
Present embodiments provide a kind of flame retardant type polyvinyl chloride plastic grain, including 6.5 parts of stabilizer, 2 parts of lubricant, lubricant
For dioctyl adipate, 25 parts of plasticizer, plasticizer is diisononyl phthalate, 110 parts of polyvinyl chloride resin powder, poly- phosphorus
Sour 25 parts of ammonium, 7 parts of colouring agent, colouring agent are titanium dioxide, 54 parts of filler, 0.4 part of borax, 0.5 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:3.
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mix, melt in homogenizer with borax, maintain 7min, then add plasticizer and smoke suppressant, mix, maintain 14min,
Lubricant, stabilizer and colouring agent are eventually adding, is mixed, maintains 11min；Then extrusion in twin screw extruder is added to make
Grain.
Embodiment 4
Present embodiments provide a kind of flame retardant type polyvinyl chloride plastic grain, including 7 parts of stabilizer, 2.2 parts of lubricant, lubricant
For dioctyl adipate, 32 parts of plasticizer, plasticizer is the blending of diisononyl phthalate and dioctyl phthalate
Thing, 112 parts of polyvinyl chloride resin powder, 26 parts of APP, 8 parts of colouring agent, colouring agent are titanium dioxide, 56 parts of filler, borax 0.3
Part, 0.6 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:
3.5。
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mix, melt in homogenizer with borax, maintain 7.5min, then add plasticizer and smoke suppressant, mix, maintain
15min, lubricant, stabilizer and colouring agent are eventually adding, mixed, maintain 12min；Then add in twin screw extruder and squeeze
Go out to be granulated.
Embodiment 5
A kind of flame retardant type polyvinyl chloride plastic grain, including 7.5 parts of stabilizer, 2.5 parts of lubricant are present embodiments provided, is lubricated
Agent is dioctyl adipate, and 36 parts of plasticizer, plasticizer is the blend of diisononyl phthalate and dioctyl adipate,
115 parts of polyvinyl chloride resin powder, 28 parts of APP, 9 parts of colouring agent, colouring agent are titanium dioxide, 58 parts of filler, borax 0.45
Part, 0.7 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:4.
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mix, melt in homogenizer with borax, maintain 8min, then add plasticizer and smoke suppressant, mix, maintain 16min,
Lubricant, stabilizer and colouring agent are eventually adding, is mixed, maintains 13min；Then extrusion in twin screw extruder is added to make
Grain.
Embodiment 6
A kind of flame retardant type polyvinyl chloride plastic grain is present embodiments provided, including 8 parts of stabilizer, 3 parts of lubricant, lubricant are
Stearmide, 40 parts of plasticizer, plasticizer are the blend of dioctyl phthalate and dioctyl adipate, polyvinyl chloride tree
120 parts of cosmetics, 30 parts of APP, 10 parts of colouring agent, colouring agent are titanium dioxide, 60 parts of filler, 0.5 part of borax, smoke suppressant 0.8
Part composition.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:3.
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mix, melt in homogenizer with borax, maintain 9min, then add plasticizer and smoke suppressant, mix, maintain 18min,
Lubricant, stabilizer and colouring agent are eventually adding, is mixed, maintains 14min；Then extrusion in twin screw extruder is added to make
Grain.
Embodiment 7
Present embodiments provide a kind of flame retardant type polyvinyl chloride plastic grain, including 6.5 parts of stabilizer, 2 parts of lubricant, lubricant
For stearmide, 25 parts of plasticizer, plasticizer is that dioctyl phthalate, diisononyl phthalate and adipic acid two are pungent
The blend of ester, 110 parts of polyvinyl chloride resin powder, 25 parts of APP, 7 parts of colouring agent, colouring agent are titanium dioxide, filler 54
Part, 0.3 part of borax, 0.4 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:3.
The present embodiment provide flame retardant type polyvinyl chloride plastic grain in the preparation, first by polyvinyl chloride resin powder and APP
Mix, melt in homogenizer with borax, maintain 10min, then add plasticizer and smoke suppressant, mix, maintain
20min, lubricant, stabilizer and colouring agent are eventually adding, mixed, maintain 15min；Then add in twin screw extruder and squeeze
Go out to be granulated.
Embodiment 8
Present embodiments provide a kind of flame retardant type polyvinyl chloride plastic grain, including 6.5 parts of stabilizer, 2 parts of lubricant, lubricant
For dioctyl adipate, 25 parts of plasticizer, plasticizer is diisononyl phthalate, 110 parts of polyvinyl chloride resin powder, poly- phosphorus
Sour 25 parts of ammonium, 7 parts of colouring agent, colouring agent are titanium dioxide, 54 parts of filler, 0.4 part of borax, 0.5 part of composition of smoke suppressant.
Smoke suppressant is the blend of molybdenum trioxide and zinc aluminate, wherein, the mass ratio of molybdenum trioxide and zinc aluminate is 1:3.
In the present embodiment, polyvinyl chloride plastic grain is mixed using tradition in preparation process and squeezes grain mode, first by stabilizer, profit
Lubrication prescription, plasticizer, polyvinyl chloride resin powder, APP, colouring agent and smoke suppressant add homogenizer stirring, then pass through
Spring charger adds twin screw extruder extruding pelletization.
After measured, above-described embodiment obtain polyvinyl chloride plastic grain polyvinyl chloride itself performance such as tensile strength, lack
Mouth buffer intensity etc. does not influence substantially.
The polyvinyl chloride plastic grain obtained to above-described embodiment carries out the test of solid material smoke-producing amount smoke density, test method
For, the igelite of the quality volume such as selection, and according to ASTME-662 testing standards, sample is in the stove of a sealing
Tested, radiant heat source amount is 2.5w/cm2.Whole test 20 minutes, record the 4th minute, the 8th minute, whole 20 minutes
Maximum smoke density value, result of the test are shown in Table 2.
The polyvinyl chloride plastic grain smoke suppressing effect result of the test table of table 2
From upper table data, the proportioning of smoke suppressant also has important influence for smoke suppressing effect, when molybdenum trioxide and aluminium
The mass ratio of sour zinc is 1:When in the range of 2~4, the smoke density caused by igelite that burns is relatively small, especially exists
Molybdenum trioxide and the mass ratio of zinc aluminate are 1:When 3, effect is best.
Embodiment 3 and embodiment 8 use identical raw material proportioning, but embodiment 3 by preparation process to preparing work
The accurate control of skill so that the crosslinking effect of smoke suppressant is strengthened, and the more traditional mixing of smoke suppressing effect is squeezed grain formula and prepared
The modeling grain that method obtains is more preferable.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of flame retardant type polyvinyl chloride plastic grain, it is characterised in that by weight, by 5 parts~8 parts of stabilizer, 1 part of lubricant
~3 parts, 20 parts~40 parts of plasticizer, 100 parts~120 parts of polyvinyl chloride resin powder, 20 parts~30 parts of APP, colouring agent 5
Part~10 parts, 50 parts~60 parts of filler, 0.2 part~0.5 part of borax, 0.2 part~0.8 part composition of smoke suppressant, the smoke suppressant are
The blend of molybdenum trioxide and zinc aluminate.
2. flame retardant type polyvinyl chloride plastic grain according to claim 1, it is characterised in that in the smoke suppressant, molybdenum trioxide
Mass ratio with zinc aluminate is 1:2~4.
3. flame retardant type polyvinyl chloride plastic grain according to claim 2, it is characterised in that in the smoke suppressant, molybdenum trioxide
Mass ratio with zinc aluminate is 1:3.
4. flame retardant type polyvinyl chloride plastic grain according to claim 1, it is characterised in that the plasticizer is phthalic acid
One or more in dioctyl ester, diisononyl phthalate and dioctyl adipate.
5. flame retardant type polyvinyl chloride plastic grain according to claim 4, it is characterised in that the plasticizer is phthalic acid
The blend of dioctyl ester, diisononyl phthalate and dioctyl adipate.
6. the flame retardant type polyvinyl chloride plastic grain according to any one of claims 1 to 3, it is characterised in that by weight, by
6 parts~7 parts of stabilizer, 2 parts of lubricant, 30 parts~35 parts of plasticizer, 105 parts~115 parts of polyvinyl chloride resin powder, APP
24 parts~27 parts, 7 parts~9 parts of colouring agent, 53 parts~57 parts of filler, 0.3 part~0.4 part of borax, 0.4 part~0.6 part of smoke suppressant
Composition, the smoke suppressant are the blend of molybdenum trioxide and zinc aluminate, and the mass ratio of molybdenum trioxide and zinc aluminate is 1:3.
7. flame retardant type polyvinyl chloride plastic grain according to claim 6, it is characterised in that by weight, by stabilizer 7
Part, 2 parts of lubricant, 33 parts of plasticizer, 110 parts of polyvinyl chloride resin powder, 25 parts of APP, 8 parts of colouring agent, 55 parts of filler,
0.4 part of borax, 0.5 part of composition of smoke suppressant.
8. flame retardant type polyvinyl chloride plastic grain according to claim 1, it is characterised in that the colouring agent is titanium dioxide.
9. flame retardant type polyvinyl chloride plastic grain according to claim 1, it is characterised in that the lubricant is butyl stearate
Or stearmide.
10. prepare the preparation method of the flame retardant type polyvinyl chloride plastic grain described in any one of claim 1 to 9, it is characterised in that：First
Polyvinyl chloride resin powder and APP and borax are mixed in homogenizer, melted, maintains 5-10min；
Then plasticizer and smoke suppressant are added, is mixed, maintains 10-20min；
Lubricant, stabilizer and colouring agent are eventually adding, is mixed, maintains 8-15min；Then add in twin screw extruder and squeeze
Go out to be granulated.
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| CN109267328A (en) * | 2018-08-15 | 2019-01-25 | 杭州布源纺织有限公司 | A kind of nano flame retardant wall paper and preparation method thereof |
| CN111269499A (en) * | 2020-01-20 | 2020-06-12 | 陕西陕煤铜川矿业有限公司 | Environment-friendly pipe, and preparation method and application of environment-friendly pipe |
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