CN102827416A - Preparation method of low-smoke halogen-free flame retardant glued protecting cover of automobile oil pipe - Google Patents
Preparation method of low-smoke halogen-free flame retardant glued protecting cover of automobile oil pipe Download PDFInfo
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- CN102827416A CN102827416A CN2012102661955A CN201210266195A CN102827416A CN 102827416 A CN102827416 A CN 102827416A CN 2012102661955 A CN2012102661955 A CN 2012102661955A CN 201210266195 A CN201210266195 A CN 201210266195A CN 102827416 A CN102827416 A CN 102827416A
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Abstract
The invention relates to a preparation method of a low-smoke halogen-free flame retardant glued protecting cover of an automobile oil pipe, comprising the following steps of: by taking first polyolefin mixed resin and a special composite inorganic flame retardant as the main raw materials, adding an additive and pelletizing to prepare an outer wall material of the protecting cover; by taking second polyolefin mixed resin as the main raw material, adding an additive and pelletizing to prepare an inner wall material of the protecting cover; and preparing the protecting cover by carrying out co-extrusion, irradiation, expansion and cutting off on the inner wall material and the outer wall material. By using the method provided by the invention, a product meets the requirements for the flame retardance, the temperature resistance as well as electric and mechanical performances of a thermal shrinkage material, meanwhile, a brand new formula containing no halogen flame retardant is adopted, in addition, the product has good handfeeling, appearance and shrinkage temperature, is capable of realizing triple and quadruple stable expansions, has the advantages such as low longitudinal shrinkage factor, excellent performance and the like, particularly has the characteristic of low-temperature shrinkage, is remarkably reduced in cost and has remarkable economic benefit and environment-friendly benefit so as to be suitable for large-scale popularization and application.
Description
[technical field]
The present invention relates to a kind of preparation method who is used for the low-smoke non-halogen flame-retardant band glue protecting jacket of automobile oil pipe.
[background technology]
The automobile oil pipe protecting jacket of selling in the market has inside and outside double-layer structure, be by have shape memory function through heating can radial shrinkage flame-retardant high-molecular outer and under shrinkage temperature the inside glue-line of melt-flowable form.After heating, inner glue-line melt-flow is filled, and automobile oil pipe is played the effects such as anticorrosion, against shock dislocation of fire-retardant, sealed damp-proof, waterproof, circuit.What outside routine, use in the prescription of layered material is halogen-containing fire retardant, the time has the height highly toxic drawback of being fuming in burning, causes the secondary disaster of fire easily.Current country is increasingly high to requirement on environmental protection, has adopted not halogen-containing fire retardant in a lot of fields, and the environmental protection organization of EU member country has also delivered the decree of the plastics entering European market of forbidding halogen-containing flame retardant.But there is shortcoming of low quality, that cost is high or flame retardant effect is bad in the protecting jacket for halogen-free flame-retardant in the prior art more.
[summary of the invention]
The purpose of this invention is to provide a kind of automobile oil pipe with band glue protecting jacket; Adopt special composite inorganic fire retardant in the raw material, the good flame retardation effect of product, high temperature resistant, have a good performance; Even it is also pollution-free during burning; Cost reduces, and has remarkable economic efficiency and environmental protection benefit, is fit to apply on a large scale.
A kind of preparation method of automotive oil pipe racks glue protecting jacket of low-smoke non-halogen flame-retardant is characterized in that may further comprise the steps:
(1) external wall material of the said band glue protecting jacket of preparation:
With EVA630, EVA14-2, EVA28-3 and four kinds of polyolefine material melt blendings of EVA180F, make the polyolefine hybrid resin No. one, represent with parts by weight, get 40～45 parts of said polyolefine hybrid resins; 50～58 parts of fire retardants, 1.5～2 parts of lubricants, 1.5～2 parts in oxidation inhibitor, 0.5～1 part of anti copper agent; 1～3 part of smoke suppressor, 1～2 part of processing stabilizers, 1～2 part of sensitization crosslinking coagent adds Banbury mixer with above-mentioned raw materials according to proportioning; Perhaps after stirring, machine joins in the twin-screw mixer machine, under 160 ± 10 ℃ temperature condition, through fully stirring with mixing through too high stirring; Screw speed 100～125rpm, 125～135 ℃ of melting temperatures combine together above-mentioned raw materials; Through the tablets press granulation, obtain the external wall material of said band glue protecting jacket then, subsequent use;
(2) the internal layer hot melt sizing material of the said band glue protecting jacket of preparation:
With 1: 1 EVA630 of weight ratio, two kinds of polyolefine material melt blendings of EVA180F, make the polyolefine hybrid resin No. two, each set of dispense ratio of raw material; Represent with parts by weight, get 68 parts of said No. two polyolefine hybrid resins, 20 parts of tackifier; 1.5 parts in oxidation inhibitor, 5 parts in softening agent; Above-mentioned raw materials is added height according to proportioning stir in the machine, stirred 5～10 minutes; Join then the twin-screw mixer machine carry out fully mixing, screw speed 80～100rpm, 105～115 ℃ of melting temperatures cause particle through tablets press again; For making each feed composition mixing evenly, the particle of making is joined in the twin-screw mixer machine again, it is mixing to carry out secondary, repeats said process, processes the internal layer hot melt sizing material of said protecting jacket, subsequent use;
(3) extrude: the internal layer hot melt sizing material that external wall material that step (1) is obtained and step (2) obtain joins in the two extruders respectively; Two said forcing machines are an angle of 90 degrees and put; Said external wall material and internal layer hot melt sizing material are through coextrusion mold behind the heating and melting; Form double-deck zonal structure, dry up, behind the surperficial lettering, be rolled onto on all rotating disks through tank cooling, wind-force then through tractor; The weight ratio of said external wall material and internal layer hot melt rubber material using quantity is 2: 1.
(4) irradiation: all rotating disks are put on the pay off rack; Behind tension bracket adjustment tension force, introduce in the radiation chamber and carry out irradiation, irradiation dose is 12～13Mrad, after the irradiation; To the protecting jacket work in-process of processing circulate the irradiation and the cooling, again through the wire coiler rolling on all rotating disks;
(5) expansion: the protecting jacket work in-process that said irradiation is good are placed on the pay off rack; Behind tension bracket adjustment tension force, introduce in the dilator, add through overbalance, after protecting jacket work in-process temperature reaches 90～100 ℃; Introducing Standard Module expands and cools off; Introduce tank then and fully cool off, product temperature is reduced to room temperature, rolling is packaged to be band glue protecting jacket finished product then.
Further improve as aforesaid method, in the said step (1), lubricant is a clorafin, and oxidation inhibitor is AT-10, and anti copper agent is MDA-1024, and smoke suppressor is a zinc borate, and processing stabilizers is a rare earth composite stabilizer, and the sensitization crosslinking coagent is TMP; In the said step (2), tackifier are staybelite, and oxidation inhibitor is AT-10, and softening agent is a DEDB.
Further improve as aforesaid method, in the said step (1), the weight percentages of components in the said polyolefine hybrid resin is: EVA630 is 30%, and EVA14-2 is 10%, and EVA28-3 is 42%, and EVA180F is 18%.
The preparation method of the fire retardant that said step (1) is used is following:
(1) the super fine magnesium hydroxide powder is inserted in the impeller; Evenly stir and be heated to 110 ℃; The dimethyl silicone oil that will account for said Marinco H grain weight amount 1.5% with spray method adds in this powder, makes the abundant coupling modification of this powder, processes the modified magnesium hydroxide powder;
(2) the ultra fine aluminium hydroxide body is inserted in the impeller, evenly stir and be heated to 110 ℃, the Triple Pressed Stearic Acid that will account for said aluminium hydrate powder weight 1.5% with spray method adds in this powder, makes the abundant coupling modification of this powder, processes the modified aluminium hydroxide powder;
(3) above-mentioned two kinds of raw materials are composite in proportion, represent with parts by weight: 45～55 parts of modified magnesium hydroxide powders, 40～35 parts of modified aluminium hydroxide powders obtain said fire retardant after evenly stirring.
Remarkable advantage of the present invention: the weak point that the present invention is directed to present protecting jacket; Abandon and shrink the fire retardant that halogen is arranged that outer layered material uses in the past; Use special composite inorganic fire retardant and polyolefine compound resin raw material instead; Guaranteeing that product satisfies that heat-shrinkage material is fire-retardant, in the heatproof, electric and mechanical property, adopting the brand-new prescription that does not contain any halogen flame, do not produce deleterious hydrogen halide during material combustion; Do not produce hostile environment De dioxin (Dioxin) type material yet, satisfy the environmental requirement of state's environmental protection instructions such as European Union fully; And the feel of product, outward appearance, shrinkage temperature are good; Three times and four times of stable expansions have been realized; Have advantages such as vertical shrinking percentage is low, excellent performance, have the characteristic that low temperature shrinks especially, cost significantly reduces; Have remarkable economic efficiency and environmental protection benefit, be fit to apply on a large scale.
[description of drawings]
Combine embodiment that the present invention is done further description with reference to the accompanying drawings.
Fig. 1 is the preparation technology schema of automobile oil pipe of the present invention with band glue protecting jacket,
Fig. 2 is the external wall material preparation technology schema of automobile oil pipe of the present invention with band glue protecting jacket,
Fig. 3 is the internal layer hot melt sizing material preparation technology schema of automobile oil pipe of the present invention with band glue protecting jacket,
Fig. 4 is the expressing technique schema of automobile oil pipe of the present invention with band glue protecting jacket,
Fig. 5 is the irradiation technique schema of automobile oil pipe of the present invention with band glue protecting jacket,
Fig. 6 is the expansion process flow sheet of automobile oil pipe of the present invention with band glue protecting jacket.
[embodiment]
Referring to Fig. 1, the preparation process of protecting jacket is following:
(1) referring to Fig. 2, the external wall material of preparation band glue protecting jacket: each set of dispense ratio of raw material, according to mass fraction: a polyolefine hybrid resin 40～45; 50～58 parts of fire retardants, 1.5～2 parts of lubricants, 1.5～2 parts in oxidation inhibitor; 0.5～1 part of anti copper agent; 1～3 part of smoke suppressor, 1～2 part of processing stabilizers, 1～2 part of sensitization crosslinking coagent.A polyolefine hybrid resin is the polyolefine hybrid resin that EVA630, EVA14-2, EVA28-3 and four kinds of polyolefine material melt blendings of EVA180F are made; EVA (ethylene ethyl propenoate) is novel environment friendly plastics wrapping material; Have advantages such as good buffering, antidetonation, heat insulation, moistureproof, anti-ecsomatics corrosion; Tool is nontoxic, do not absorb water, and its shockproof properties is superior to PS Traditional Packing materials such as (foams), and compliance with environmental protection requirements.The polyolefine hybrid resin of above-mentioned four kinds of trade mark EVA mixed with resin preparation is compared with single EVA resin, has higher elongation at break and breaking tenacity, also has the improved melt index, helps the following process of product.
Each component of said raw material is added Banbury mixer according to proportioning perhaps to add in the twin-screw mixer machine after machine stirs through too high stirring; Under 160 ± 10 ℃ temperature condition, through fully stirring with mixing screw speed 100～125rpm; 125～135 ℃ of melting temperatures; Each component is combined together, be prepared into the external wall material of described band glue protecting jacket then through the tablets press granulation, subsequent use;
(2) referring to Fig. 3, the internal layer hot melt sizing material of preparation band glue protecting jacket: each set of dispense ratio of raw material, according to mass fraction: 68 parts of No. two polyolefine hybrid resins, 20 parts of tackifier, 1.5 parts in oxidation inhibitor, 5 parts in softening agent; The polyolefine hybrid resin of said No. two polyolefine hybrid resins for EVA630, two kinds of polyolefine material melt blendings of EVA180F are made; Each component of said raw material is added height according to proportioning stir in the machine, stirred 5～10 minutes; Add then the twin-screw mixer machine carry out fully mixing, screw speed 80～100,105～115 ℃ of melting temperatures cause particle through tablets press again; In order to make each component mixing evenly, the particle of making is added in the twin-screw mixer machine, mixing once more, screw speed 80～100,105～115 ℃ of melting temperatures, the internal layer hot melt sizing material of being with the glue protecting jacket is processed in granulation then, and is subsequent use;
(3) referring to Fig. 4; Extrude: the internal layer hot melt sizing material of the external wall material of step (1) preparation and step (2) preparation is added into respectively in the two extruders that an angle of 90 degrees puts, through behind the fuselage heating and melting from coextrusion mold, the formation bilayer structure; Then through the tank cooling; Wind-force dries up, and behind the surperficial lettering, receives on all rotating disks through tractor; The weight amount ratio that external wall material and internal layer hot melt sizing material use is 2: 1;
(4) referring to Fig. 5; Irradiation: all rotating disks are put on the pay off rack,, introduce in the radiation chamber through the whole tension bracket of tension adjustable; The present invention adopts irradiation device for electronic accelerator; Irradiation dose 12～13Mrad, to the protecting jacket work in-process of processing circulate irradiation and cooling, through the wire coiler rolling on all rotating disks;
(5) referring to Fig. 6, expansion: the protecting jacket that irradiation is good is placed on the pay off rack, adjustment tension force; Introduce in the dilator, add, after the protecting jacket work in-process reach 90～100 ℃ of technological temperatures through overbalance; Introducing Standard Module expands and cools off; Introduce tank then and fully cool off, product temperature is reduced to room temperature, rolling is packaged into described automobile oil pipe with band glue protecting jacket finished product then.
Lubricant in the step (1) is a clorafin; Oxidation inhibitor is AT-10 (four [β-(3; The 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester), anti copper agent is MDA-1024 (tertiarybutylhydroquinone), smoke suppressor is a zinc borate; Processing stabilizers is rare earth composite stabilizer (REC), and the sensitization crosslinking coagent is TMP (TriMethylolPropane(TMP)).
Tackifier in the step (2) are staybelite, and oxidation inhibitor AT-10, softening agent are DEDB.
The polyolefine hybrid resin of a polyolefine hybrid resin in the step (1) for making according to weight percentage: EVA630 30%, EVA14-2 10%, EVA28-3 42% and 18% 4 kind of polyolefine material melt blending of EVA180F.
The number of times of the radiation chamber internal recycle irradiation of described step (4) is at radiation chamber internal recycle 50 circles.The preparation technology of the fire retardant in the raw material of the present invention is:
(1) the super fine magnesium hydroxide powder is inserted in the impeller; Evenly stir and be heated to 100 ℃; Adopting spray method will account for the coupling agent of Marinco H grain weight amount 1.5%---dimethyl silicone oil adds in the powder, makes the abundant coupling modification of powder, makes the modified magnesium hydroxide powder;
(2) the ultra fine aluminium hydroxide body is inserted in the impeller; Evenly stir and be heated to 100 ℃; Adopting spray method will account for the tensio-active agent of aluminium hydrate powder weight 1.5%---Triple Pressed Stearic Acid adds in the powder, makes the abundant activation of aluminium hydroxide powder, makes the modified aluminium hydroxide powder;
(3) will above the modified magnesium hydroxide powder, the modified aluminium hydroxide powder that obtain composite in proportion, according to parts by weight: modified magnesium hydroxide powder 45-55 part, modified aluminium hydroxide powder 40-35 part; Evenly stir, process composite inorganic fire retardant;
The fire retardant research of the world today develops towards non-halogen direction.White lake, flame retardant of magnesium hydroxide are to rely on the decomposition heat absorption and discharge water outlet and play fire retardation when using; The aluminum oxide, the Natural manganese dioxide chemical property that have nontoxicity, do not corrode processor, the decomposition back generate are stable, therefore do not produce secondary and endanger.In recent years, white lake (ATH) fire retardant is a kind of that application is the most extensive in the inorganic combustion inhibitor, consumption is maximum, and flame retardant of magnesium hydroxide then is a kind of [4] with fastest developing speed.Compare with white lake, the decomposition temperature of Marinco H higher (white lake is about 220 ℃, and Marinco H is then at 350～400 ℃) is more suitable for the processing request of some polymkeric substance, and promotes the effect of polymkeric substance carbonization in addition.
But use Marinco H to do fire retardant and have following shortcoming again: the one, flame retarding efficiency is lower; Thereby the addition of having relatively high expectations; What have reaches more than 50～150 weight parts; Along with the increase of loading level, flame retardant effect also improves thereupon, but also has a strong impact on the processing characteristics and the physical and mechanical property of polymkeric substance simultaneously; The 2nd, its surface hydrophilic oleophobic is prone to form coacervate, in organic polymer, is difficult to disperse equably, and like this, consistency and processing fluidity between polar fire retardant and the nonpolar polymer materials become, and the mechanical mechanics property of material descends.
Marinco H generally need carry out modification to its surface with properties-correcting agent and handle during as fire retardant, improves its dispersiveness and consistency in polymkeric substance.The properties-correcting agent that uses has silane coupling agent and titanate coupling agent.Coupling agent is a kind of surface-modifying agent with both sexes structure, can be divided into several kinds in silicane, titanate ester, zircoaluminate class and complex compound thereof etc.A part of functional group in its molecule, can with the various radical reactions of powder surface, form strong chemically bonded; Another part is a carbochain, can twine with organic polymer generation chemical reaction or physics, thereby two kinds of very big materials of nature difference are coupled together securely.
Among the present invention, be to adopt dimethyl silicone oil Marinco H to be carried out surface treatment as coupling agent.Dimethyl silicone oil is tasteless nontoxic, has physiology inertia, good chemicalstability, electric edge property and weathering resistance, and range of viscosities is wide, and zero pour is low; Flash-point is high, and hydrophobic performance is good, and has very high resistance to shear; Through production inspection, after the dimethyl silicone oil modification, the Marinco H surface becomes hydrophobic nature by wetting ability; Degree of surface activation reaches 98.2%, and when mixing with polymer materials as the super fine magnesium hydroxide powder of fire retardant like this, its consistency and processibility are greatly improved.
White lake (being called for short ATH) fire retardant has nontoxic, good stability, does not produce toxic gas under the high temperature, the advantages such as the amount of being fuming in the time of can also reducing the plastics burning, and also cheap, wide material sources.The dehydration endothermic temperature of white lake is lower, is about 235～350 ℃, and therefore the flame retardant effect when plastics just take fire is remarkable.ATH is 40% o'clock at addition, can significantly slow down the heat decomposition temperature of PE (Vilaterm), PP (Vestolen PP 7052), PVC (polyvinyl chloride) and ABS (third rare nitrile/butadiene/styrene copolymers) etc., has the effect of the good fire-retardant and reduction amount of being fuming.Ordinary hydrogen alumina fire retardant subject matter is that required loading level is big, otherwise does not just have good flame-retardant effect, but loading level big must cause resin mixing when the moulding flowability of material poor, influence Drawing abillity and mechanical property." chemical science and technology market " the 31st volume the 12nd phase (in December, 2008 publication) P27 page or leaf disclosed " experimental study of stearic acid modified aluminium hydroxide fire retardant "; Disclosed modified effect and the optimum amount of Triple Pressed Stearic Acid to white lake; The consumption that the present invention adopts is 1.5%; The product that obtains has good apparent mass, the good flowability of preparation material.
Feel, outward appearance, shrinkage temperature that the inventive method obtains product are good, have realized three times and four times of stable expansions, have advantages such as vertical shrinking percentage is low, excellent performance; Because material of main part has adopted the EVA hybrid resin; Product has the low temperature shrinkage character especially, and cost significantly reduces
Automobile oil pipe is with the excellent performance of band glue protecting jacket, and concrete performance is seen table one.
Table one product performance index table
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited accompanying claims and equivalent thereof.
Claims (6)
1. the preparation method of the automotive oil pipe racks glue protecting jacket of a low-smoke non-halogen flame-retardant is characterized in that may further comprise the steps:
1) external wall material of the said band glue protecting jacket of preparation:
With EVA630, EVA14-2, EVA28-3 and four kinds of polyolefine material melt blendings of EVA180F, make the polyolefine hybrid resin No. one, represent with parts by weight, get 40～45 parts of said polyolefine hybrid resins; 50～58 parts of fire retardants, 1.5～2 parts of lubricants, 1.5～2 parts in oxidation inhibitor, 0.5～1 part of anti copper agent; 1～3 part of smoke suppressor, 1～2 part of processing stabilizers, 1～2 part of sensitization crosslinking coagent adds Banbury mixer with above-mentioned raw materials according to proportioning; Perhaps after stirring, machine joins in the twin-screw mixer machine, under 160 ± 10 ℃ temperature condition, through fully stirring with mixing through too high stirring; Screw speed 100～125rpm, 125～135 ℃ of melting temperatures combine together above-mentioned raw materials; Through the tablets press granulation, obtain the external wall material of said band glue protecting jacket then, subsequent use;
2) the internal layer hot melt sizing material of the said band glue protecting jacket of preparation:
With 1: 1 EVA630 of weight ratio, two kinds of polyolefine material melt blendings of EVA180F, make the polyolefine hybrid resin No. two, each set of dispense ratio of raw material; Represent with parts by weight, get 68 parts of said No. two polyolefine hybrid resins, 20 parts of tackifier; 1.5 parts in oxidation inhibitor, 5 parts in softening agent; Above-mentioned raw materials is added height according to proportioning stir in the machine, stirred 5～10 minutes; Join then the twin-screw mixer machine carry out fully mixing, screw speed 80～100rpm, 105～115 ℃ of melting temperatures cause particle through tablets press again; For making each feed composition mixing evenly, the particle of making is joined in the twin-screw mixer machine again, it is mixing to carry out secondary, repeats said process, processes the internal layer hot melt sizing material of said protecting jacket, subsequent use;
3) extrude: the internal layer hot melt sizing material that external wall material that step (1) is obtained and step (2) obtain joins in the two extruders respectively; Two said forcing machines are an angle of 90 degrees and put; Said external wall material and internal layer hot melt sizing material are through coextrusion mold behind the heating and melting; Form double-deck zonal structure, dry up, behind the surperficial lettering, be rolled onto on all rotating disks through tank cooling, wind-force then through tractor; The weight ratio of said external wall material and internal layer hot melt rubber material using quantity is 2: 1.
4) irradiation: all rotating disks are put on the pay off rack; Behind tension bracket adjustment tension force, introduce in the radiation chamber and carry out irradiation, irradiation dose is 12～13Mrad, after the irradiation; To the protecting jacket work in-process of processing circulate the irradiation and the cooling, again through the wire coiler rolling on all rotating disks;
5) expansion: the protecting jacket work in-process that said irradiation is good are placed on the pay off rack; Behind tension bracket adjustment tension force, introduce in the dilator, add through overbalance, after protecting jacket work in-process temperature reaches 90～100 ℃; Introducing Standard Module expands and cools off; Introduce tank then and fully cool off, product temperature is reduced to room temperature, rolling is packaged to be band glue protecting jacket finished product then.
2. according to the preparation method of the automotive oil pipe racks glue protecting jacket of the said a kind of low-smoke non-halogen flame-retardant of claim 1, it is characterized in that the preparation method of the fire retardant that said step (1) is used is following:
1) the super fine magnesium hydroxide powder is inserted in the impeller; Evenly stir and be heated to 110 ℃; The dimethyl silicone oil that will account for said Marinco H grain weight amount 1.5% with spray method adds in this powder, makes the abundant coupling modification of this powder, processes the modified magnesium hydroxide powder;
2) the ultra fine aluminium hydroxide body is inserted in the impeller, evenly stir and be heated to 110 ℃, the Triple Pressed Stearic Acid that will account for said aluminium hydrate powder weight 1.5% with spray method adds in this powder, makes the abundant activation modification of this powder, processes the modified aluminium hydroxide powder;
3) above-mentioned two kinds of raw materials are composite in proportion, represent with parts by weight: 45～55 parts of modified magnesium hydroxide powders, 40～35 parts of modified aluminium hydroxide powders obtain said fire retardant after evenly stirring.
3. according to the preparation method of the automotive oil pipe racks glue protecting jacket of the said a kind of low-smoke non-halogen flame-retardant of claim 1; It is characterized in that: in the said step (1), lubricant is a clorafin, and oxidation inhibitor is AT-10; Anti copper agent is MDA-1024; Smoke suppressor is a zinc borate, and processing stabilizers is a rare earth composite stabilizer, and the sensitization crosslinking coagent is TMP.
4. according to the preparation method of the automotive oil pipe racks glue protecting jacket of the said a kind of low-smoke non-halogen flame-retardant of claim 1, it is characterized in that: in the said step (2), tackifier are staybelite, and oxidation inhibitor is AT-10, and softening agent is a DEDB.
5. according to the preparation method of the automotive oil pipe racks glue protecting jacket of the said a kind of low-smoke non-halogen flame-retardant of claim 1; It is characterized in that: in the said step (1); Weight percentages of components in the said polyolefine hybrid resin is: EVA630 is 30%; EVA14-2 is 10%, and EVA28-3 is 42%, and EVA180F is 18%.
6. according to the preparation method of the automotive oil pipe racks glue protecting jacket of the said a kind of low-smoke non-halogen flame-retardant of claim 1, it is characterized in that: in the said step (4), the number of times of radiation chamber internal recycle irradiation is at said radiation chamber internal recycle 50 circles.
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| CN2012102661955A CN102827416A (en) | 2012-07-19 | 2012-07-19 | Preparation method of low-smoke halogen-free flame retardant glued protecting cover of automobile oil pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113372613A (en) * | 2021-06-21 | 2021-09-10 | 万华化学(四川)有限公司 | Composite modifier for reducing melt index of polypropylene, preparation method and application thereof, and granulation process of high melt index polypropylene |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598249A (en) * | 2009-07-02 | 2009-12-09 | 福建陶金峰新材料有限公司 | Environment-friendly high fire-retardant melting sealed double-wall pipe |
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- 2012-07-19 CN CN2012102661955A patent/CN102827416A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598249A (en) * | 2009-07-02 | 2009-12-09 | 福建陶金峰新材料有限公司 | Environment-friendly high fire-retardant melting sealed double-wall pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113372613A (en) * | 2021-06-21 | 2021-09-10 | 万华化学(四川)有限公司 | Composite modifier for reducing melt index of polypropylene, preparation method and application thereof, and granulation process of high melt index polypropylene |
| CN113372613B (en) * | 2021-06-21 | 2022-07-12 | 万华化学(四川)有限公司 | Composite modifier for reducing melt index of polypropylene, preparation method and application thereof, and granulation process of high melt index polypropylene |
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Application publication date: 20121219 |