CN103087432B - Flame-retardant and oil-resistant marine rubber material and molding preparation method thereof - Google Patents
Flame-retardant and oil-resistant marine rubber material and molding preparation method thereof Download PDFInfo
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- CN103087432B CN103087432B CN201310030719.5A CN201310030719A CN103087432B CN 103087432 B CN103087432 B CN 103087432B CN 201310030719 A CN201310030719 A CN 201310030719A CN 103087432 B CN103087432 B CN 103087432B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92923—Calibration, after-treatment or cooling zone
Abstract
The invention relates to a flame-retardant and oil-resistant marine rubber material which is composed of a raw rubber substrate, an activator, a plasticizer, carbon black, a flame retardant, a filler, a vulcanizer, a vulcanization accelerator, a protectant and a processing aid, wherein the raw rubber substrate is a comixture of CSM (Chlorosulfonated Polyethylene) and NBR (Nitrile Butadiene Rubber); and the vulcanizer is a mixture of HVA-2 and sulfur. During the molding process, a thinning-passing treatment is respectively conducted on the granular CSM and the granular NBR; then, all the components are sequentially added into the CSM and the NBR according to proportion by utilizing an open miller or an internal mixer so as to be evenly mixed and subjected to standing; a rubber compound is added into a single screw extruder to extrude the rubber material continuously; and the rubber material is molded in hot air of 180 to 220 DEG C or in a micro wave vulcanizing manner. The prepared rubber material is applied to rubber products on oil product transport marines, and has an excellent oil-resistant performance and a good flame-retardant performance.
Description
Technical field
The present invention relates to a kind of rubber item be applied on oil product transport-ship, be specifically related to a kind of marine rubber material and molding method for preparing thereof of fire-retardant, oil resistant.
Background technology
Chlorosulfonated polyethylene rubber (CSM) is based on polyethylene, and introducing massfraction is that the chlorine of 23-47% and a small amount of chlorosulfonyl (1-1.7%) are made.Introducing due to chlorine makes the macromolecular crystallinity of CSM reduce and have certain elasticity and flame retardant resistance, and the polarity of chlorine gives again the good oil-proofness of CSM simultaneously; Chlorosulfonyl (-SClO
2) be that one is rich in reactive functional group, the active cross-linking set of CSM is given in its introducing.Because the macromolecular main chain of CSM is saturated, thus with other alkadiene rubber phase ratio, it has excellent resistance to weather performance, thermotolerance and ozone resistance, mainly for the manufacture of oil resisting rubber hose, fire retarding conveying band and sealing article and electric wire etc.
Along with the development of every profession and trade technology, higher requirement being it is also proposed to CSM cross-linked rubber, improving its oil resistance and flame retardant properties etc. as required.The oil resistance of CSM is roughly equal to chloroprene rubber (CR), suitable with the NBR of low acrylonitrile content.In CSM and in using, high acrylonitrile NBR obviously can improve oil resistance and the resistance to low temperature of CSM.Meng Xiande etc. observe the morphological structure of CSM/NBR blend by transmission electron microscope (TEM) in " Structure and Properties of NBR/CSM blend ", find that CSM/NBR is 40/60(mass ratio) time blend generation phase reversion.Chen Kun Sheng etc. in " formula factors is on the impact of NBR/CSM blend compounds physicals ", have studied CSM/NBR and with than, the multiple Synergist S-421 95 such as sulphur dosage, carbon black on the impact of CSM/NBR blend compounds performance.In CSM, add fire retardant is a kind of effective ways strengthening its flame retardant properties.Li Jingwu has prepared the cable jacket material with good physical mechanical property and flame retardant properties by adding hydroxide flame retardant in CSM in " retardant cable of locomotives low smoke and low halogen CSM rubber jacking ", and end properties can meet the demand of technical standard of UIC895 and 502 (1994).
CSM has multiple crosslinking method, adopt yellow lead oxide vulcanization system can obtain the cross-linked rubber of over-all properties the best, Jin Wanxiang have studied the application of plumbous oxide in CSM in more detail in " cooperation of plumbous oxide vulcanization system is on the impact of chlorosulfonated polyethylene rubber performance ", but lead-containing compounds will more and more be abandoned due to its hypertoxicity.And magnesium oxide is relative with oil resistance with the water tolerance of tetramethylolmethane cross-linking system poor.Bismaleimides cross-linking system due to its uniqueness structure and crosslinked after the carbon-carbon bond that formed can give the good thermotolerance of CSM and fabulous incompressible deformation performance.Wang Qiaofu introduces the unleaded vulcanization system of CSM in " the unleaded sulfuration of chlorosulfonated polyethylene rubber ", be mainly tetramethylolmethane, bismaleimides, staybelite, epoxy resin and peroxide vulcanizing system etc., wherein the compression set of bismaleimides is obviously better than other several vulcanization system.Simultaneously bismaleimide amine crosslinker also can participate in unsaturated double-bond in crosslinking acrylonitrile butadiene macromolecular chain to promote cross-linking density.Liu Zuguang proves to play a part to add strong cross-linking in the common sulfur sulfide system of HVA-2 at unsaturated double-bond in " between N, N-the application of penylene bismaleimides in the common sulfur sulfide system of natural rubber ".CSM/NBR blend compounds forms Co-crosslinked System to a certain extent under the effect of bismaleimide amine crosslinker, contributes to the thermostability of lifting elastomeric material, oil resistance and flame retardant properties.
As the rubber item be applied on oil product transport-ship, require that this material has excellent oil-proofness and has excellent flame retardant properties.Meanwhile, in use its outside atmosphere is comparatively harsh for this elastomeric material; In actual applications, the external environmental factor of material aging of the present invention is caused to mainly contain multiple oils, salt solution, ozone, ultraviolet, quiet dynamic load etc.For strengthening the ageing-resistant performance of this elastomeric material, extend its work-ing life, the present invention also adds the protective agent such as reactive anti-deteriorant and ultraviolet-resistant absorbent in elastomeric material.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of not only fire-retardant but also present stable marine rubber material and molding method for preparing thereof to multiple oil, its goods can be applicable on oil product transport-ship.
The object of the present invention is achieved like this:
A marine rubber material for fire-retardant, oil resistant, its composition and mass fraction are:
Rubber matrix 100 parts
Activator 1-10 part
Softening agent 20-40 part
Carbon black 20-50 part
Fire retardant 20-50 part
Weighting agent 10-50 part
Vulcanizing agent 2-4 part
Vulcanization accelerator 1-3 part
Protective agent 2-5 part
Processing aid 2-5 part
Wherein, rubber matrix is the blend of chlorosulfonated polyethylene rubber CSM and paracril NBR, and the mass ratio of CSM and NBR is 60:40 ~ 80:20.
Preferably, in the CSM adopted in the present invention, the massfraction of chlorine is about 35%, and the massfraction of chlorosulfonyl is about 1.5%.
The NBR that the present invention adopts is the NBR of middle high acrylonitrile content, and wherein the content of vinyl cyanide is at 33-41%.
The NBR of CSM and middle high acrylonitrile content has close solubility parameter, and the used time can reach the preferably compatible even thermodynamic compatibility of machinery.Wherein the mass ratio of CSM and NBR is 60:40 ~ 80:20, and the CSM making main chain saturated is in external phase in the blend, to ensure the resistance to weather of this invention material excellence.
Softening agent of the present invention is liquid chlorinated paraffin.Appropriate softening agent can ensure the processing characteristics of elastomeric material, reduces the hardness of material simultaneously; But add intensity and flame retardant properties that softening agent can reduce elastomeric material, and produce the huge amount of being fuming during burning.Cl content is liquid state at the clorafin of about 50%, is comparatively suitable flame retardant type softening agent.
Half reinforcement super-normal structure black N550 or SP5000 that the preferred Cabot Co., Ltd of carbon black that the present invention adopts produces, the particle diameter of carbon black used is 40-100nm.The intensity adding processing characteristics and the lifting elastomeric material being conducive to improving unvulcanized rubber material of carbon black; And appropriate carbon black helps lend some impetus to charring during burning, be conducive to the lifting of flame retardant properties.
The present invention adopts weighting agent to be one or more in the inert fillers such as white carbon black, barium sulfate, talcum powder, potter's clay.The volume fraction reducing rubber in sizing material can improve oil-proofness and flame retardant resistance.
Described activator is conventional activator, and one or both that can adopt in zinc oxide, stearic acid are also used.
The fire retardant that the present invention adopts is halide-containing and antimonous oxide, the composite antimonous oxide of the halogen in CSM, decabromodiphenyl oxide or clorafin, contributes to forming halogen-antimony highly effective flame-retardant system, reaches excellent flame retardant effect.
Described vulcanizing agent is N, N ' mixture an of-penylene bismaleimides (HVA-2) and Sulfur, wherein the mass fraction of HVA-2 is the 2.5-3.5% of CSM; The mass fraction of Sulfur is the 0.5-1.5% of NBR.Respectively using HVA-2, Sulfur as the main vulcanizing agent of CSM and NBR, form co-crosslinking to a certain degree simultaneously.
The vulcanization accelerator that the present invention adopts is the promotor that rubber is conventional, as being: one or more in 2-benzothiazolyl mercaptan (M), dithio-bis-benzothiazole (DM), zinc dibutyl dithiocarbamate (BZ), bis-pentamethylenethiuram tetrasulfide (DPTT), tetramethyl-thiuram disulfide (TMTD) or N-cyclohexyl-2-[4-morpholinodithio base sulphenamide (CZ) are also used.
The protective agent that the present invention adopts is UV light absorber (AUI), reactive anti-deteriorant N-(4-aniiinophenyl) maleimide (MC), paraffin, Microcrystalline Wax and other rubber are commonly used in anti-aging agent, and one or more are also used.Containing reacting with rubber macromolecule and the active group of ageing of rubber can be suppressed in reactive anti-deteriorant; This kind of anti-aging agent in sulfidation with chemical bonding in rubber macromolecule network, there is non-migrating, the non-volatile and advantage of not extracting out.CSM rubber product generally need not add UV light absorber especially, but in the applied environment of harshness, suitably can add benzophenone material as UV light absorber.
The processing aid that the present invention adopts is polyoxyethylene glycol, low molecular polyethylene or commercially available multi-functional processing aid RF-70, RL-20 etc., and appropriate processing aid not only can improve the dispersiveness of sizing material, can also improve the roll banding characteristic of CSM sizing material simultaneously.
By coordinating the multiple additives such as carbon black, softening agent, fire retardant, vulcanization accelerator, vulcanizing agent and anti-aging agent in the blend of chlorosulfonated polyethylene rubber with paracril, finally prepare a kind of physical and mechanical properties and resistance to weather is of good performance presents stable fire-retardant rubber material to multiple oil.
A molding method for preparing for the marine rubber material of fire-retardant, oil resistant, first by granular chlorosulfonated polyethylene rubber (CSM) and paracril (NBR) each thin-pass 5-10 all over after mix; Then use mill or Banbury mixer rubber matrix, carbon black, softening agent, fire retardant, vulcanization accelerator, vulcanizing agent to be added successively in proportion mix and park 24 hours, mixing total time controlled within 30 minutes.Rubber unvulcanizate is added in single screw extrusion machine, control the temperature of head, fuselage, the shape of the mouth as one speaks and charging bole at 60-90 DEG C, the rotating speed of screw rod, in 20-30r/min, makes sizing material extrude continuously, and in 180-220 DEG C of warm air or with microwave (915-2450MHz) sulfidization molding.
Compared with prior art, the invention has the beneficial effects as follows:
This material presents stability to multiple oils, be applied in the rubber item on oil product transport-ship, have excellent oil-proofness and have excellent flame retardant properties, this elastomeric material has fabulous UV resistant and ozone resistance simultaneously, ageing-resistant performance is strong, long service life.
Embodiment
Below by embodiment, the present invention will be further described, but not as limitation of the present invention.
embodiment 1
Each component and mass fraction for: the trade mark that Lianyun Harbour Jin Taida company produces is the granular CSM of 3695,60 parts; The paracril N230S that JSR company of Japan produces, 40 parts; Carbon black N550,25 parts; Clorafin 50,30 parts; Decabromodiphenyl oxide, 20 parts; Antimonous oxide, 20 parts; Barium sulfate, 10 parts; Zinc oxide, 1.5 parts; Stearic acid, 1 part; Anti-aging agent RD, 1.5 parts; Reactive antioxidant MC, 1.5; Antioxidant NBC, 0.8 part; Microcrystalline Wax, 2 parts; UV light absorber, 2 parts; Each 1.5 parts of processing aid RL-20 and RF-70 that Science and Technology Ltd. produces is contained in Jinchang, Guangzhou; Accelerant CZ, 0.4 part; Vulcanization accelerator TMTD, 0.2 part; Sulfur, 0.3 part; HVA-2,2 parts.
The preparation technology of embodiment 1 is: be first blended into evenly with after minimum roll spacing bag roller thin-pass 10 times respectively by granular chlorosulfonated polyethylene rubber and paracril on 16 cun of opening rubber mixing machines; Then reinforced after being enlarged to suitable roll spacing, again carbon black, softening agent, fire retardant, weighting agent, vulcanization accelerator, vulcanizing agent etc. are joined in opening rubber mixing machine evenly mixing in proportion successively, roller temperature control is at 40-60 DEG C, refining glue time controling at about 30 minutes, mixing evenly after park 24 hours.Add in single screw extrusion machine by the rubber unvulcanizate after parking, control temperature makes head be 70 DEG C, and fuselage is 60 DEG C, and shape of the mouth as one speaks temperature is 90 DEG C, and the rotating speed of screw rod is 30 r/min, and sizing material is extruded continuously, and in 220 DEG C of warm airs sulfidization molding.
embodiment2
Each component and mass fraction are the CSM40 that domestic Jilin Chemical company produces, 80 parts; The paracril N220S that JSR company of Japan produces, 20 parts; Carbon black SP5000,30 parts; Clorafin 50(is liquid, softening agent), 30 parts; Clorafin 70(is solid-state, fire retardant), 30 parts; Potter's clay, 10 parts; Antimonous oxide, 15 parts; Zinc oxide, 1 part; Stearic acid, 1 part; Anti-aging agent RD, 1 part; Reactive antioxidant MC, 1 part; Antioxidant A W, 1 part; Microcrystalline Wax, 1 part; UV light absorber, 2 parts; Each 1.5 parts of processing aid RL-20 and RF-70 that Science and Technology Ltd. produces is contained in Jinchang, Guangzhou; Accelerant CZ, 0.5 part; Vulkacit D PTT, 0.4 part; Sulfur, 0.3 part; HVA-2,2.5 parts.
The preparation technology of embodiment 2 is: on 16 cun of opening rubber mixing machines first by CSM and NBR respectively with each thin-pass of minimum roll spacing 10 times; Then join in internal rubber mixer evenly mixing in proportion successively by rubber, carbon black, softening agent, protective agent etc., 70 DEG C of binder removals, refining glue time controling was at about 30 minutes; Mixing evenly after rubber unvulcanizate moved to opening rubber mixing machine adds vulcanization accelerator and Sulfur to mixing even and park 24 hours.Add in single screw extrusion machine by the rubber unvulcanizate after parking, control temperature makes head be 70 DEG C, and fuselage is 70 DEG C, and shape of the mouth as one speaks temperature is 80 DEG C, and the rotating speed of screw rod is 25r/min, and sizing material is extruded continuously, and selects the microwave vulcanization of 2200MHz shaping.
comparative example1
The optimization of C/C composites in " formula factors is on the impact of NBR/CSM blend compounds physicals " such as repetition Chen Kun Sheng.Fill a prescription composed as follows: the CSM40 that domestic Jilin Chemical company produces, 60 parts; The paracril N230S of the middle acrylonitrile content that JSR company of Japan produces, 40 parts; Zinc oxide, 2.5 parts; Stearic acid, 1.5 parts; Carbon black N550,55 parts; Clorafin 50,10 parts; Antioxidant MB, 1 part; Vulcanization accelerator TMTD, 0.5 part; Accelerant CZ, 0.9 part; Sulfur, 1 part.
The preparation technology of comparative example 1: first the addition of C SM and NBR is added in 3L Banbury mixer, be mixed at 80 DEG C and be uniformly dispersed, be down to normal temperature subsequently, adding carbon black, softening agent, protective agent etc. more in proportion successively joins in internal rubber mixer evenly mixing in proportion successively, 70 DEG C of binder removals, refining glue time controling was at about 30 minutes; Mixing evenly after rubber unvulcanizate moved to opening rubber mixing machine adds vulcanization accelerator to mixing evenly and park 24 hours.Under 150 DEG C of conditions, in vulcanizing press, carry out sulfuration, pressure selection 10MPa, the time is 20 minutes, namely obtains the test piece of 2 mm thick.
comparative example2
Repeat the embodiment 1 that CN101759940A announces.Each material is composed as follows: the CSM3695 that Lianyun Harbour Jin Taida company produces, 100 parts; Magnesium oxide, 5 parts; Stearic acid, 0.8; Carbon black N550,40 parts; Light calcium carbonate, 35 parts; Dioctyl ester 20,10 parts; Epoxy resin, 18; Antioxidant A, 1.5 parts, flow promotor FL, 3 parts; Vulkacit D PTT, 1 part; Altax, 1.5 parts; HVA-2,2 parts.
The preparation technology of comparative example 2 is with comparative example 1.
Tested by the sample of embodiment and comparative example, data are in table 1.
The test data of table 1 embodiment and comparative example:
* 1 crude oil is the Type Aasgaard lightweight oil in oil field, the Norway North Sea;
* the aromatics quality mark in 2 aromatic hydrocarbons process operation oil is about 23%.
Claims (2)
1. a marine rubber material for fire-retardant, oil resistant, is characterized in that: its component and mass fraction for: the trade mark that Lianyun Harbour Jin Taida company produces is the granular chlorosulfonated polyethylene rubber CSM of 3695,60 parts; The paracril N230S that JSR company of Japan produces, 40 parts; Carbon black N550,25 parts; Clorafin 50,30 parts; Decabromodiphenyl oxide, 20 parts; Antimonous oxide, 20 parts; Barium sulfate, 10 parts; Zinc oxide, 1.5 parts; Stearic acid, 1 part; Anti-aging agent RD, 1.5 parts; Reactive antioxidant MC, 1.5; Antioxidant NBC, 0.8 part; Microcrystalline Wax, 2 parts; UV light absorber, 2 parts; Each 1.5 parts of processing aid RL-20 and RF-70 that Science and Technology Ltd. produces is contained in Jinchang, Guangzhou; Accelerant CZ, 0.4 part; Vulcanization accelerator TMTD, 0.2 part; Sulfur, 0.3 part; HVA-2,2 parts;
Its preparation technology is: be first blended into evenly with after minimum roll spacing bag roller thin-pass 10 times respectively by granular chlorosulfonated polyethylene rubber and paracril on 16 cun of opening rubber mixing machines; Then reinforced after being enlarged to suitable roll spacing, again carbon black, softening agent, fire retardant, weighting agent, vulcanization accelerator, vulcanizing agent etc. are joined in opening rubber mixing machine evenly mixing in proportion successively, roller temperature control is at 40-60 DEG C, refining glue time controling at about 30 minutes, mixing evenly after park 24 hours; Add in single screw extrusion machine by the rubber unvulcanizate after parking, control temperature makes head be 70 DEG C, and fuselage is 60 DEG C, and shape of the mouth as one speaks temperature is 90 DEG C, and the rotating speed of screw rod is 30 r/min, and sizing material is extruded continuously, and in 220 DEG C of warm airs sulfidization molding.
2. a marine rubber material for fire-retardant, oil resistant, is characterized in that: its component and mass fraction are the chlorosulfonated polyethylene rubber CSM40 that domestic Jilin Chemical company produces, 80 parts; The paracril N220S that JSR company of Japan produces, 20 parts; Carbon black SP5000,30 parts; Softening agent liquid chlorinated waxes 50,30 parts; The solid-state clorafin of fire retardant 70,30 parts; Potter's clay, 10 parts; Antimonous oxide, 15 parts; Zinc oxide, 1 part; Stearic acid, 1 part; Anti-aging agent RD, 1 part; Reactive antioxidant MC, 1 part; Antioxidant A W, 1 part; Microcrystalline Wax, 1 part; UV light absorber, 2 parts; Each 1.5 parts of processing aid RL-20 and RF-70 that Science and Technology Ltd. produces is contained in Jinchang, Guangzhou; Accelerant CZ, 0.5 part; Vulkacit D PTT, 0.4 part; Sulfur, 0.3 part; HVA-2,2.5 parts;
Its preparation technology is: on 16 cun of opening rubber mixing machines first by CSM and NBR respectively with each thin-pass of minimum roll spacing 10 times; Then join in internal rubber mixer evenly mixing in proportion successively by rubber, carbon black, softening agent, protective agent etc., 70 DEG C of binder removals, refining glue time controling was at about 30 minutes; Mixing evenly after rubber unvulcanizate moved to opening rubber mixing machine adds vulcanization accelerator and Sulfur to mixing even and park 24 hours; Add in single screw extrusion machine by the rubber unvulcanizate after parking, control temperature makes head be 70 DEG C, and fuselage is 70 DEG C, and shape of the mouth as one speaks temperature is 80 DEG C, and the rotating speed of screw rod is 25r/min, and sizing material is extruded continuously, and selects the microwave vulcanization of 2200MHz shaping.
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| CN103804809A (en) * | 2014-03-13 | 2014-05-21 | 苏州市相城区明达复合材料厂 | Antibacterial rubber pad |
| CN104151727B (en) * | 2014-07-25 | 2016-03-30 | 安徽江淮电缆集团有限公司 | Vehicle low smoke and low halogen waterproof chlorosulfonated polyethylene sheath eraser composition |
| CN104650476A (en) * | 2015-01-27 | 2015-05-27 | 安徽德源电缆集团有限公司 | Modified sheath material for cables |
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| CN107245905A (en) * | 2017-06-22 | 2017-10-13 | 合肥励仙电力工程有限公司 | A kind of anti-flammability corrugated cardboard material and preparation method thereof |
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| CN116574339A (en) * | 2023-06-02 | 2023-08-11 | 广州市明兴电缆有限公司 | Flame-retardant corrosion-resistant cable sheath material and preparation method thereof |
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