CN105037919A - Rat-proof and termite-proof anti-bacterial polypropylene communication pipe material - Google Patents
Rat-proof and termite-proof anti-bacterial polypropylene communication pipe material Download PDFInfo
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- CN105037919A CN105037919A CN201510120691.3A CN201510120691A CN105037919A CN 105037919 A CN105037919 A CN 105037919A CN 201510120691 A CN201510120691 A CN 201510120691A CN 105037919 A CN105037919 A CN 105037919A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention discloses a rat-proof and termite-proof anti-bacterial polypropylene communication pipe material which includes the components, by weight: 100 parts of polypropylene, 12-18 parts of modified glass fibers, 8-12 parts of modified nano-carbon tubes, 25-35 parts of inorganic filling materials, 7-10 parts of a toughening agent, 1-3 parts of an antioxidant, 0.5-1 part of a dispersing agent, 1-2 parts of a lubricant, 1-2 parts of a mildew-proofing agent, 0.5-1 part of a demoulding agent, 1-2 parts of a nano titanium dioxide silver-supported anti-bacterial agent, 1-2 parts of a termite-proof agent and 0.5-1 part of a rat-proof agent. The material is high in strength and toughness, is excellent in rat-proof and termite-proof performances, is good in anti-bacterial performance, and is good in mildew-proofing performance.
Description
Technical field
The present invention relates to a kind of polypropylene communication pipe material, particularly a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material.
Background technology
Polypropylene is a kind of thermoplastic resin obtained by propylene polymerization.Isotatic polypropylene (isotacticpolyprolene), Atactic Polypropelene (atacticpolypropylene) and syndiotactic polypropylene (syndiotacticpolypropylene) three kinds is divided into by methyl arrangement position.
The same side that methyl is arranged in molecular backbone chain claims isotatic polypropylene, if the chaotic both sides being arranged in molecular backbone chain of methyl claim Atactic Polypropelene, the both sides being arranged alternately in molecular backbone chain when methyl claim syndiotactic polypropylene.In the acrylic resin that general industry is produced, isotactic structural content is about 95%, and all the other are random or syndiotactic polypropylene.Industrial products with isotactic thing for main component.Polypropylene also comprises the multipolymer of propylene and a small amount of ethene.Be generally translucent colorless solid, odorless is nontoxic.The highly crystallized due to compound with regular structure, therefore fusing point can up to 167 DEG C.Heat-resisting, corrosion-resistant, the sterilization of goods used vapour is its outstanding advantages.Density is little, is the lightest general-purpose plastics.Shortcoming is that low-temperature impact resistance is poor, more aging, but can be overcome respectively by modification.
Polypropylene communication pipe is widely used in numerous industries such as pharmacy, chemical industry, agricultural chemicals, environmental protection, light industry, printing and dyeing, but existing polypropylene communication pipe, termite-proof rodent-proof characteristic is not good, physicals is low, anti-microbial property is also poor.
Summary of the invention
The object of the present invention is to provide a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, have higher intensity and toughness, termite-proof rodent-proof characteristic is good, and anti-microbial property is good, and mildew resistance is good.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, described termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, by weight, is mixed by following component:
Polypropylene 100 parts, modified glass-fiber 12-18 part, modified carbon nano-tubes 8-12 part, mineral filler 25-35 part, toughner 7-10 part, oxidation inhibitor 1-3 part, dispersion agent 0.5-1 part, lubricant 1-2 part, mould inhibitor 1-2 part, releasing agent 0.5-1 part, nano TiO 2 carrying silver antibacterial agent 1-2 part, anti-termite agent 1-2 part, Ratproof agent 0.5-1 part.
The present invention coordinates toughner by modified glass-fiber, modified carbon nano-tubes, to polypropylene modification process, can greatly improve polyacrylic intensity and toughness.Due to the environment of the environment for use underground humidity often of polypropylene communication pipe, therefore, fungi erosion is the important factor threatening the polypropylene communication pipe life-span, and the present invention adds mould inhibitor in formula, to overcome the threat that fungi erosion brings.Termite and damaged by rats are also the important factors affecting the polypropylene communication pipe life-span, and the present invention adds anti-termite agent and Ratproof agent in formula, sting the threat with damaged by rats to overcome termite.In addition, polypropylene communication pipe is due to environment for use reason, the microorganisms such as easy breed bacteria and virus, the present invention adds nano TiO 2 carrying silver antibacterial agent in formula, nano TiO 2 carrying silver antibacterial agent has sterilization under the visible ray of nano titanium oxide itself and UV-light, antiviral, bacterium for degrading, organic effect, have again and do not having nanometer silver potent antibacterial, virus-killing action under light source.Antibacterial ability is extremely strong, and antibacterial range is wide, durable antibacterial effect, and silver ion release rate long stable effect, is having solar light irradiation then, photochemical catalysis also can be utilized thoroughly to decompose and eliminate bacterium, viral residue.
As preferably, the preparation method of described modified glass-fiber is: glass fibre being immersed mass concentration is in the salpeter solution of 15-20%, supersound process 10-15min, then be flood 15-30min in 10%-20% silane coupling agent-ethanol solution by glass fibre in mass concentration, take out glass fibre, vacuum-drying 5-8h at 40-50 DEG C.Process by glass fibre is immersed in salpeter solution solution, to remove the impurity on glass surface and to make the thick good fortune of fiberglass surfacing increase specific surface area, to promote and polyacrylic bonding strength.
After silane coupling agent-ethanol solution modified glass-fiber, glass fibre and polyacrylic bonding strength can be promoted.
As preferably, the preparation method of described modified carbon nano-tubes is:
(1) CNT (carbon nano-tube) powder is added in the methanol solution of mass concentration 30-50% and be uniformly mixed to obtain premixed liquid, premixed liquid is mixed with the volume ratio of acid solution according to 1:3-5, mechanical stirring 30-60min, filter, use water and absolute ethanol washing CNT (carbon nano-tube) respectively, then at 50-60 DEG C, vacuum-drying 2-4h obtains elementary modified carbon nano-tubes;
By adding in the methanol solution of mass concentration 30-50% by CNT (carbon nano-tube), CNT (carbon nano-tube) can be made to be uniformly dispersed, being beneficial to follow-up acid solution oxidation modification like this.Acid solution can make CNT (carbon nano-tube) wetting ability reduce, and lipophilicity increases, thus improves CNT (carbon nano-tube) and polyacrylic bonding force, increases reinforced effects.
(2) elementary modified carbon nano-tubes being added mass concentration is in the silane coupling agent-ethanol solution of 5-10%, under logical condition of nitrogen gas, heats 1-2 hour at 50-60 DEG C, and anhydrous methanol washing 2-4 time, at 60-70 DEG C, vacuum-drying 3-5h obtains modified carbon nano-tubes.
The present invention adopts modified carbon nano-tubes, make carbon tube-surface functional groupization, carbon pipe dispersiveness is promoted to remove the reuniting effect of CNT (carbon nano-tube) in polypropylene base, produce the covalent linkage that can interlink with polypropylene base at carbon tube-surface simultaneously, make to form powerful covalently bonded between organic/inorganic two interface, when matrix material is subject to external impacts, can impact energy be transferred to the stronger carbon pipe of intensity from the polypropylene base that intensity is more weak, by the deformation of carbon tubular elastic or distortion, and then impact energy is dissipated, reach best toughened and reinforced effect.And then make higher, the frivolous communication pipe of intensity.
Silane coupled agent molecule produces silanol base (Si-OH) after hydrolyzing, and CNT (carbon nano-tube) tentatively modified in its surface with hydroxyl (-OH), silanol base can with the condensation reaction of hydroxyl (-OH) row, slough a water molecules after condensation together, make between silane coupling agent and CNT (carbon nano-tube) with powerful the linking together of covalently bonded, and give CNT (carbon nano-tube) new functional group, this functional group can react with polypropylene further, make also to form covalently bonded between CNT (carbon nano-tube) and polypropylene, when material is by external impacts, surging force can be delivered in the CNT (carbon nano-tube) of mechanical properties excellence by this covalently bonded by surging force from polypropylene, CNT (carbon nano-tube) is via vibrations, external shock power consumes by the Material function of swing and spring-like formula, mechanism so gives the ability that integral material dissipates to external stress, the shock resistance of material is made obviously to increase.
As preferably, the salpeter solution of described acid solution to be mass concentration be 2-3% and mass concentration are the mixture of phosphoric acid solution according to 1:1-2 volume ratio of 5-8%.Acid solution can make CNT (carbon nano-tube) wetting ability reduce, and lipophilicity increases, thus improves CNT (carbon nano-tube) and polyacrylic bonding force, increases reinforced effects.
As preferably, described silane coupling agent is selected from the one in KH550, KH560, KH570.
As preferably, described mineral filler is selected from one or more in carbon black, calcium carbonate, kaolin, titanium dioxide.
As preferably, described toughner is urethane acrylate; Described dispersion agent is polyethylene wax, and described lubricant is ethylene bis stearamide, and described releasing agent is calcium stearate or Zinic stearas.Urethane acrylate is a kind of oligopolymer of the end acrylate containing unsaturated functional group, good compatibility is had with polypropylene, be dispersed in polypropylene and play toughening effect, PUA has ammonia ester bond, be characterized in being easy to form hydrogen bond between high-polymer molecular, under the effect of external force, hydrogen bond is separable and absorb external energy, when again forming hydrogen bond again after external force removing, hydrogen bond like this splits, again formed again, it is a reversible repetition, polypropylene is made to have the snappiness of urethane concurrently, high-wearing feature, weathering resistance, excellent low-temperature performance and high-tear strength.
As preferably, described Ratproof agent model is Ratproof agent M-17.
As preferably, described anti-termite agent model is anti-termite agent DH-201.
The invention has the beneficial effects as follows: have higher intensity and toughness, termite-proof rodent-proof characteristic is good, and anti-microbial property is good, and mildew resistance is good.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in further detail.
In the present invention, if not refer in particular to, the raw material adopted and equipment etc. all can be buied from market or this area is conventional.Method in following embodiment, if no special instructions, is the ordinary method of this area.
Embodiment 1
A kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, described termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, by weight, is mixed by following component:
Polypropylene 100 parts, modified glass-fiber 12 parts, modified carbon nano-tubes 12 parts, carbon black N55025 part, urethane acrylate (commercially available) 10 parts, antioxidant 1010 1 part, polyethylene wax 0.5 part, ethylene bis stearamide 1 part, mould inhibitor is (commercially available, plastic mould-proof agent JLK-106) 1 part, calcium stearate 0.5 part, nano TiO 2 carrying silver antibacterial agent is (commercially available, Hangzhou Wanjing New Material Co., Ltd.) 1 part, anti-termite agent (anti-termite agent DH-201, commercially available, Taicang great Hao Industrial Co., Ltd.) 1 part, Ratproof agent (Ratproof agent M-17, commercially available, Hai great Chemical Co., Ltd. of Qingdao City) 0.5 part.
The preparation method of described modified glass-fiber is: glass fibre being immersed mass concentration is in the salpeter solution of 15%, supersound process 15min, then be flood 30min in 10% Silane coupling agent KH550-ethanol solution by glass fibre in mass concentration, take out glass fibre, vacuum-drying 8h at 40 DEG C.
The preparation method of described modified carbon nano-tubes is:
(1) CNT (carbon nano-tube) powder is added in the methanol solution of mass concentration 30% and be uniformly mixed to obtain premixed liquid, premixed liquid is mixed with the volume ratio of acid solution according to 1:3, described acid solution to be mass concentration be 2% salpeter solution and mass concentration be that the phosphoric acid solution of 8% is according to the mixture of 1:1 volume ratio, mechanical stirring 30min, filter, use water and absolute ethanol washing CNT (carbon nano-tube) respectively, then at 50 DEG C, vacuum-drying 4h obtains elementary modified carbon nano-tubes;
(2) elementary modified carbon nano-tubes being added mass concentration is in the Silane coupling agent KH550-ethanol solution of 5%, and under logical condition of nitrogen gas, heat 2 hours at 50 DEG C, anhydrous methanol washs 2 times, and at 60 DEG C, vacuum-drying 5h obtains modified carbon nano-tubes.
Embodiment 2
A kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, described termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, by weight, is mixed by following component:
Polypropylene 100 parts, modified glass-fiber 18 parts, modified carbon nano-tubes 8 parts, kaolin 35 parts, urethane acrylate (commercially available) 7 parts, irgasfos 168 3 parts, polyethylene wax 1 part, ethylene bis stearamide 2 parts, mould inhibitor is (commercially available, plastic mould-proof agent JLK-106) 2 parts, calcium stearate 1 part, nano TiO 2 carrying silver antibacterial agent is (commercially available, Hangzhou Wanjing New Material Co., Ltd.) 2 parts, anti-termite agent (anti-termite agent DH-201, commercially available, Taicang great Hao Industrial Co., Ltd.) 2 parts, Ratproof agent (Ratproof agent M-17, commercially available, Hai great Chemical Co., Ltd. of Qingdao City) 1 part.
The preparation method of described modified glass-fiber is: glass fibre being immersed mass concentration is in the salpeter solution of 20%, supersound process 10min, then be flood 15min in 20% silane coupling agent KH560-ethanol solution by glass fibre in mass concentration, take out glass fibre, vacuum-drying 5h at 50 DEG C.
The preparation method of described modified carbon nano-tubes is:
(1) CNT (carbon nano-tube) powder is added in the methanol solution of mass concentration 50% and be uniformly mixed to obtain premixed liquid, premixed liquid is mixed with the volume ratio of acid solution according to 1:5, described acid solution to be mass concentration be 3% salpeter solution and mass concentration be that the phosphoric acid solution of 5% is according to the mixture of 1:2 volume ratio, mechanical stirring 60min, filter, use water and absolute ethanol washing CNT (carbon nano-tube) respectively, then at 60 DEG C, vacuum-drying 2h obtains elementary modified carbon nano-tubes;
(2) elementary modified carbon nano-tubes being added mass concentration is in the silane coupling agent KH560-ethanol solution of 10%, and under logical condition of nitrogen gas, heat 1 hour at 60 DEG C, anhydrous methanol washs 4 times, and at 70 DEG C, vacuum-drying 3h obtains modified carbon nano-tubes.
Embodiment 3
A kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, described termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, by weight, is mixed by following component:
Polypropylene 100 parts, modified glass-fiber 15 parts, modified carbon nano-tubes 10 parts, titanium dioxide 30 parts, urethane acrylate (commercially available) 8 parts, antioxidant 1010 2 parts, polyethylene wax 0.7 part, ethylene bis stearamide 1.5 parts, mould inhibitor is (commercially available, plastic mould-proof agent JLK-106) 1.5 parts, calcium stearate 0.8 part, nano TiO 2 carrying silver antibacterial agent is (commercially available, Hangzhou Wanjing New Material Co., Ltd.) 1.5 parts, anti-termite agent (anti-termite agent DH-201, commercially available, Taicang great Hao Industrial Co., Ltd.) 1.5 parts, Ratproof agent (Ratproof agent M-17, commercially available, Hai great Chemical Co., Ltd. of Qingdao City) 0.8 part.
The preparation method of described modified glass-fiber is: glass fibre being immersed mass concentration is in the salpeter solution of 18%, supersound process 12min, then be flood 230min in 15% silane coupling agent KH570-ethanol solution by glass fibre in mass concentration, take out glass fibre, vacuum-drying 6h at 45 DEG C.
The preparation method of described modified carbon nano-tubes is:
(1) CNT (carbon nano-tube) powder is added in the methanol solution of mass concentration 40% and be uniformly mixed to obtain premixed liquid, premixed liquid is mixed with the volume ratio of acid solution according to 1:4, described acid solution to be mass concentration be 2% salpeter solution and mass concentration be that the phosphoric acid solution of 7% is according to the mixture of 1:1.5 volume ratio, mechanical stirring 50min, filter, use water and absolute ethanol washing CNT (carbon nano-tube) respectively, then at 55 DEG C, vacuum-drying 3h obtains elementary modified carbon nano-tubes;
(2) elementary modified carbon nano-tubes being added mass concentration is in the silane coupling agent KH570-ethanol solution of 8%, and under logical condition of nitrogen gas, heat 1.5 hours at 55 DEG C, anhydrous methanol washs 3 times, and at 65 DEG C, vacuum-drying 4h obtains modified carbon nano-tubes.
Termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material properties test (ASTM standard) result of the present invention is as follows:
Termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material of the present invention adopts GB/T2951.38-1986 electric wire termite test method, carry out knocking down method test: termite knockdown time KT50(min), embodiment 1 is 143min, and embodiment 2 is 162min, and embodiment 3 is 150min.
Protection against rodents is tested: choose weight 250 ~ 300 grams of SD male rats, stainless steel mouse cage is put in stochastic sampling, 5, every cage; By test piece (specification 150mm × 20mm × 3mm, termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material of the present invention is made) stretch in cage from mouse cage top, with thin copper wire tightly colligation covering near the stainless (steel) wire at feeding place, the part that test piece is exposed at beyond mouse cage is no more than 20mm, one cage hangs three test pieces, test piece is evenly arranged on mouse cage width, and interval is approximately 80mm.Rat is in duration of test regular supply drink ArsenazoⅢ (namely every day changed clear water by waterer, and feeding place has remained food).Observe the activity of rat and diet situation and test period every day and terminate the situation that rear sample bitten by rat, test period is 7 days.Observe discovery after test, test piece only has the vestige that slightly bites.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (9)
1. a termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, is characterized in that, described termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material, by weight, is mixed by following component:
Polypropylene 100 parts, modified glass-fiber 12-18 part, modified carbon nano-tubes 8-12 part, mineral filler 25-35 part, toughner 7-10 part, oxidation inhibitor 1-3 part, dispersion agent 0.5-1 part, lubricant 1-2 part, mould inhibitor 1-2 part, releasing agent 0.5-1 part, nano TiO 2 carrying silver antibacterial agent 1-2 part, anti-termite agent 1-2 part, Ratproof agent 0.5-1 part.
2. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 1, it is characterized in that: the preparation method of described modified glass-fiber is: glass fibre being immersed mass concentration is in the salpeter solution of 15-20%, supersound process 10-15min, then be flood 15-30min in 10%-20% silane coupling agent-ethanol solution by glass fibre in mass concentration, take out glass fibre, vacuum-drying 5-8h at 40-50 DEG C.
3. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 1, is characterized in that: the preparation method of described modified carbon nano-tubes is:
(1) CNT (carbon nano-tube) powder is added in the methanol solution of mass concentration 30-50% and be uniformly mixed to obtain premixed liquid, premixed liquid is mixed with the volume ratio of acid solution according to 1:3-5, mechanical stirring 30-60min, filter, use water and absolute ethanol washing CNT (carbon nano-tube) respectively, then at 50-60 DEG C, vacuum-drying 2-4h obtains elementary modified carbon nano-tubes;
(2) elementary modified carbon nano-tubes being added mass concentration is in the silane coupling agent-ethanol solution of 5-10%, under logical condition of nitrogen gas, heats 1-2 hour at 50-60 DEG C, and anhydrous methanol washing 2-4 time, at 60-70 DEG C, vacuum-drying 3-5h obtains modified carbon nano-tubes.
4. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 3, is characterized in that: the salpeter solution of described acid solution to be mass concentration be 2-3% and mass concentration are the mixture of phosphoric acid solution according to 1:1-2 volume ratio of 5-8%.
5. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to Claims 2 or 3, is characterized in that: described silane coupling agent is selected from the one in KH550, KH560, KH570.
6. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 1 or 2 or 3, is characterized in that: described mineral filler is selected from one or more in carbon black, calcium carbonate, kaolin, titanium dioxide.
7. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 1 or 2 or 3, is characterized in that: described toughner is urethane acrylate; Described dispersion agent is polyethylene wax, and described lubricant is ethylene bis stearamide, and described releasing agent is calcium stearate or Zinic stearas.
8. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 1 or 2 or 3, is characterized in that: described Ratproof agent model is Ratproof agent M-17.
9. a kind of termite-resistant rodent-resistant antimicrobial form polypropylene communication pipe material according to claim 1 or 2 or 3, is characterized in that: described anti-termite agent model is anti-termite agent DH-201.
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| CN106279980A (en) * | 2016-08-11 | 2017-01-04 | 刘世超 | High ferro waterproof material |
| CN106496775A (en) * | 2016-10-11 | 2017-03-15 | 佛山市飞时达新材料科技有限公司 | A kind of manufacture method of the PP cable jacket materials of termite-resistant rodent-resistant |
| CN106633389A (en) * | 2016-11-23 | 2017-05-10 | 杭州欣隆实业有限公司 | Modified polypropylene duct for power cable and preparation method thereof |
| CN109401070A (en) * | 2018-10-19 | 2019-03-01 | 宋光明 | A kind of antibacterial pipe material and its manufacturing method |
| CN110194866A (en) * | 2019-06-19 | 2019-09-03 | 宿迁市春明医疗器材有限公司 | A kind of new and effective antimicrobial form PP composite material |
| CN114479270A (en) * | 2022-01-11 | 2022-05-13 | 宁波帅特龙集团有限公司 | Hydrophobic polypropylene/glass fiber composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106221006A (en) * | 2016-08-11 | 2016-12-14 | 刘世超 | The waterproof photostabilized material of high ferro |
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| CN106496775A (en) * | 2016-10-11 | 2017-03-15 | 佛山市飞时达新材料科技有限公司 | A kind of manufacture method of the PP cable jacket materials of termite-resistant rodent-resistant |
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| CN106633389B (en) * | 2016-11-23 | 2019-07-23 | 杭州欣隆实业有限公司 | A kind of power cable modified polypropene conduit and preparation method thereof |
| CN109401070A (en) * | 2018-10-19 | 2019-03-01 | 宋光明 | A kind of antibacterial pipe material and its manufacturing method |
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