CN105061943A - Manufacturing method for anti-aging PVC tubular product - Google Patents
Manufacturing method for anti-aging PVC tubular product Download PDFInfo
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Abstract
The invention provides a manufacturing method for an anti-aging PVC tubular product. The anti-aging PVC tubular product comprises the following components in parts by weight: 4-6 parts of a composite stabilizer, 0.5-1.5 parts of a lubricant, 7-8 parts of filler, 3 parts of a coloring agent, 8-10 parts of light calcium carbonate, 6 parts of titanium dioxide, 3 parts of a whitening agent, 2 parts of a flexibilizer, 1-2 parts of a stabilizer, 0.1-0.5 part of an antioxidant and 90-100 parts of PVC resin. The anti-aging PVC tubular product provided by the invention is simple to prepare, the antibacterial capacity is increased, and the product is more excellent in notch impact strength, tensile strength, bending strength, flexural modulus and elongation at break, is relatively long in service life and is more anti-aging.
Description
Technical field
The present invention relates to PVC technical field, particularly relate to a kind of anti-aging PVC tubing manufacture method.
Background technology
PVC is polyvinyl chloride, adds other one-tenth in addition and assigns to strengthen its thermotolerance, toughness, ductility etc.The superiors of this surface film are paints, and middle main component is polyvinyl chloride, and orlop is back of the body coating adhesive.It is the world today is liked deeply, the rather popular and a kind of synthetic materials be also widely used.Its global usage quantity is in second in various synthetic materials.According to statistics, only 1 year nineteen ninety-five, the turnout of PVC in Europe just has about 5,000,000 tons, and its consumption is then 5,300,000 tons.In Germany, the turnout of PVC and consumption average out to 1,400,000 tons.Pvc pipe (PVC-U pipe) hard polvinyl choride pipe, being use pressure sintering extrusion molding after being coordinated with stablizer, lubricant etc. by polyvinyl chloride (PVC) RESINS, is the plastic pipe be developed and applied the earliest.PVC-U pipe resistance to corrosion is strong, be easy to bonding, price is low, quality is hard, but owing to having PVC-U monomer and additive exudation, is only applicable to delivery temperature and is no more than in the water feeding system of 45 DEG C.Plastic conduit for carrying tap water, waste water, chemical, heating fluid and cooling fluid, food, ultrarapture liquid, mud, gas, the application of pressurized air and vacuum system.Existing PVC resistance of aging is poor, and work-ing life is short.
Summary of the invention
(1) technical problem that will solve
The problem to be solved in the present invention is to provide a kind of anti-aging PVC tubing manufacture method, poor to overcome resistance of aging in prior art, the defect that work-ing life is short.
(2) technical scheme
For solveing the technical problem, the invention provides a kind of anti-aging PVC tubing manufacture method, it is characterized in that: step one, respectively group weight percent is as follows for it: one package stabilizer 4-6 weight part, lubricant 0.5-1.5 weight part, weighting agent 7-8 weight part, tinting material 3 weight part, light calcium carbonate 8-10 weight part, titanium dioxide 6 weight part, whitening agent 3 weight part, toughner 2 weight part, stablizer 1-2 weight part, oxidation inhibitor 0.1-0.5 weight part, polyvinyl chloride resin 90-100 weight part; Step 2, the various raw material of accurate-metering, and drop in high-speed kneading machine in order, order of addition(of ingredients) is: polyvinyl chloride resin, one package stabilizer, lubricant, tinting material, weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor; Kneading is needed to add weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor again in 5 minutes after tinting material adds, when whole raw material reaches 120 DEG C-130 DEG C again after 15 minutes mediate, put into cooling and stirring machine, be cooled to 40 DEG C and shut down discharging; Step 3, granulation, tablets press each district temperature is: 1 70 DEG C-80 DEG C, district, and 2nd district are 140 DEG C-170 DEG C, 3rd district are 170 DEG C-180 DEG C, and head temperature controls at 170 DEG C-180 DEG C, 4 120 DEG C-135 DEG C, districts, 5th district are 140 DEG C-170 DEG C, and 6th district are 170 DEG C-190 DEG C, and 7th district are 190 DEG C-200 DEG C; Step 4, extrudes, and the temperature in each district of forcing machine is: 1 85 DEG C, district ± 5 DEG C, 2 130 DEG C, districts ± 5 DEG C, 3 150 DEG C, districts ± 5 DEG C, flange 140 DEG C ± 5 DEG C, mouth mould 150 ± 5 DEG C, extruder screw rotating speed is 50r/min, extruder screw diameter is 45mm, L/D=20, whirlwind pelletizing, water cooling, pulling speed is 10r/min; Step 5, vacuum cooling is shaping, is evacuated by vacuum tank by means of vacuum pump, the inwall making pipe outer wall be adsorbed on shaping cover reaches cooling and shaping, the processing condition of Vacuum shaping are generally: vacuum tightness 20.0-55kPa, water temperature 10-20 DEG C, and the water in vacuum tank nebulizes as the best; Step 6, traction, the effect of towing mechanism is that the tubing extruded to head provides certain tractive force and pulling speed, draw tubing equably, and the wall thickness by regulating pulling speed to regulate pipe, pulling speed requires very even, and energy stepless time adjustment, pulling speed should than the linear velocity of tube extrusion 2%-15% slightly soon; Step 7, incising pipes.
Further, the color dot that in material kneaded in described step 2, Ying Wuwei scatters or unmixed good resin-oatmeal, improve tubing clarity.
Further, the melt flow rate (MFR) of granulation in described step 3 is 0.5 ~ 2g/10min, makes granulation tubing out more evenly full, increases tensile strength.
Further, described oxidation inhibitor can be three grades of butyl-4-methylphenols, two (3,5-, tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3,5-, tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester.
(3) beneficial effect
Anti-aging PVC tubing manufacture method of the present invention, preparation is simple, and increase antibacterial ability, notched Izod impact strength, tensile strength, flexural strength, modulus in flexure and elongation at break are better, and longer service life is more anti-aging.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
A kind of anti-aging PVC tubing manufacture method of the present invention, step one, it is as follows that it respectively organizes weight percent: one package stabilizer 4 weight part, lubricant 0.5 weight part, weighting agent 7 weight part, tinting material 3 weight part, light calcium carbonate 8 weight part, titanium dioxide 6 weight part, whitening agent 3 weight part, toughner 2 weight part, stablizer 1 weight part, oxidation inhibitor 0.1 weight part, polyvinyl chloride resin 90-100 weight part; Step 2, the various raw material of accurate-metering, and drop in high-speed kneading machine in order, order of addition(of ingredients) is: polyvinyl chloride resin, one package stabilizer, lubricant, tinting material, weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor; Kneading is needed to add weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor again in 5 minutes after tinting material adds, when whole raw material reaches 120 DEG C again after 15 minutes mediate, put into cooling and stirring machine, be cooled to 40 DEG C and shut down discharging; Step 3, granulation, tablets press each district temperature is: 1 70 DEG C, district, and 2nd district are 140 DEG C, and 3rd district are 170 DEG C, and head temperature controls at 170 DEG C, 4 120 DEG C, districts, and 5th district are 140 DEG C, and 6th district are 170 DEG C, and 7th district are 190 DEG C; Step 4, extrudes, and the temperature in each district of forcing machine is: 1 80 DEG C, district, 2 125 DEG C, districts, 3 145 DEG C, districts, flange 135 DEG C, mouth mould 155 DEG C, extruder screw rotating speed is 50r/min, and extruder screw diameter is 45mm, L/D=20, whirlwind pelletizing, water cooling, pulling speed is 10r/min; Step 5, vacuum cooling is shaping, is evacuated by vacuum tank by means of vacuum pump, the inwall making pipe outer wall be adsorbed on shaping cover reaches cooling and shaping, the processing condition of Vacuum shaping are generally: vacuum tightness 20kPa, water temperature 10 DEG C, and the water in vacuum tank nebulizes as the best; Step 6, traction, the effect of towing mechanism is that the tubing extruded to head provides certain tractive force and pulling speed, draw tubing equably, and the wall thickness by regulating pulling speed to regulate pipe, pulling speed requires very even, and energy stepless time adjustment, pulling speed should than the linear velocity of tube extrusion slightly fast 2%; Step 7, incising pipes, tubing cross section must vertically and balance, hydrogen peroxide put into by the tubing cut, and puts in the aqueous solution of soluble copper salt and the mixing solutions of ammoniacal liquor, carry out reduction reaction after mixing, separate after end and precipitate and wash, what obtain is modification tubing, anti-aging.
The color dot that in material kneaded in described step 2, Ying Wuwei scatters or unmixed good resin-oatmeal.The melt flow rate (MFR) of granulation in described step 3 for oxidation inhibitor described in 0.5g/10min can be three grades of butyl-4-methylphenols, two (3,5-tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3,5-, tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester etc.
The present embodiment adopts one package stabilizer to be liquid calcium zinc complexes.Lubricant is stearic acid, butyl stearate, oleylamide, ethylene bis stearamide etc., and the present embodiment adopts stearic acid.Weighting agent is calcium carbonate, potter's clay, talcum, diatomite, silicon-dioxide, mica powder, asbestos, metal, metal oxide etc., and the present embodiment adopts calcium carbonate.Tinting material is zinc powder (zinc oxide), cadmium red, ferric oxide, carbon black, chrome yellow, zinc yellow, the husky Huang of the Chinese, and the present embodiment adopts zinc powder.Whitening agent is coumarin type, benzo oxygen nitrogen type, and the present embodiment adopts benzo oxygen nitrogen type.Toughner is styrene butadiene thermoplasticelastomer, methyl methacrylate-divinyl-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, chlorinatedpolyethylene, ethylene-vinyl acetate copolymer, and the present embodiment adopts styrene butadiene thermoplasticelastomer.Stablizer is liquid barium zinc complexes.
In step 3, granulation 3 district is 170 DEG C and 4th district is 120 DEG C, produces pressure reduction, increases tubing internal stress, strengthens tensile strength.
Embodiment two
A kind of anti-aging PVC tubing manufacture method, step one, it is as follows that it respectively organizes weight percent: one package stabilizer 5 weight part, lubricant 1 weight part, weighting agent 7.5 weight part, tinting material 3 weight part, light calcium carbonate 9 weight part, titanium dioxide 6 weight part, whitening agent 3 weight part, toughner 2 weight part, stablizer 1.5 weight part, oxidation inhibitor 0.25 weight part, polyvinyl chloride resin 90-100 weight part; Step 2, the various raw material of accurate-metering, and drop in high-speed kneading machine in order, order of addition(of ingredients) is: polyvinyl chloride resin, one package stabilizer, lubricant, tinting material, weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor; Kneading is needed to add weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor again in 5 minutes after tinting material adds, when whole raw material reaches 125 DEG C again after 15 minutes mediate, put into cooling and stirring machine, be cooled to 40 DEG C and shut down discharging; Step 3, granulation, tablets press each district temperature is: 1 75 DEG C, district, and 2nd district are 155 DEG C, and 3rd district are 175 DEG C, and head temperature controls at 175 DEG C, 4 130 DEG C, districts, and 5th district are 155 DEG C, and 6th district are 180 DEG C, and 7th district are 195 DEG C; Step 4, extrudes, and the temperature in each district of forcing machine is: 1 85 DEG C, district, 2 130 DEG C, districts, 3 150 DEG C, districts, flange 140 DEG C, mouth mould 150 DEG C, extruder screw rotating speed is 50r/min, and extruder screw diameter is 45mm, L/D=20, whirlwind pelletizing, water cooling, pulling speed is 10r/min; Step 5, vacuum cooling is shaping, is evacuated by vacuum tank by means of vacuum pump, the inwall making pipe outer wall be adsorbed on shaping cover reaches cooling and shaping, the processing condition of Vacuum shaping are generally: vacuum tightness 40kPa, water temperature 15 DEG C, and the water in vacuum tank nebulizes as the best; Step 6, traction, the effect of towing mechanism is that the tubing extruded to head provides certain tractive force and pulling speed, draw tubing equably, and the wall thickness by regulating pulling speed to regulate pipe, pulling speed requires very even, and energy stepless time adjustment, pulling speed should than the linear velocity of tube extrusion slightly fast 8%; Step 7, cutting, tubing cross section must vertical and balance.
The color dot that in material kneaded in described step 2, Ying Wuwei scatters or unmixed good resin-oatmeal.The melt flow rate (MFR) of granulation in described step 3 is 1g/10min.
The present embodiment adopts one package stabilizer to be liquid calcium zinc complexes.Lubricant is stearic acid, butyl stearate, oleylamide, ethylene bis stearamide etc., and the present embodiment adopts stearic acid.Weighting agent is calcium carbonate, potter's clay, talcum, diatomite, silicon-dioxide, mica powder, asbestos, metal, metal oxide etc., and the present embodiment adopts calcium carbonate.Tinting material is zinc powder (zinc oxide), cadmium red, ferric oxide, carbon black, chrome yellow, zinc yellow, the husky Huang of the Chinese, and the present embodiment adopts zinc powder.Whitening agent is coumarin type, benzo oxygen nitrogen type, and the present embodiment adopts benzo oxygen nitrogen type.Toughner is styrene butadiene thermoplasticelastomer, methyl methacrylate-divinyl-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, chlorinatedpolyethylene, ethylene-vinyl acetate copolymer, and the present embodiment adopts styrene butadiene thermoplasticelastomer.Stablizer is liquid barium zinc complexes.
Embodiment three
A kind of anti-aging PVC tubing manufacture method, step one, it is as follows that it respectively organizes weight percent: one package stabilizer 6 weight part, lubricant 1.5 weight part, weighting agent 8 weight part, tinting material 3 weight part, light calcium carbonate 10 weight part, titanium dioxide 6 weight part, whitening agent 3 weight part, toughner 2 weight part, stablizer 2 weight part, oxidation inhibitor 0.5 weight part, polyvinyl chloride resin 90-100 weight part; Step 2, the various raw material of accurate-metering, and drop in high-speed kneading machine in order, order of addition(of ingredients) is: polyvinyl chloride resin, one package stabilizer, lubricant, tinting material, weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor; Kneading is needed to add weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor again in 5 minutes after tinting material adds, when whole raw material reaches 130 DEG C again after 15 minutes mediate, put into cooling and stirring machine, be cooled to 40 DEG C and shut down discharging; Step 3, granulation, tablets press each district temperature is: 1 80 DEG C, district, and 2nd district are 170 DEG C, and 3rd district are 180 DEG C, and head temperature controls at 180 DEG C, 4 135 DEG C, districts, and 5th district are 170 DEG C, and 6th district are 190 DEG C, and 7th district are 200 DEG C; Step 4, extrudes, and the temperature in each district of forcing machine is: 1 90 DEG C, district, 2 135 DEG C, districts, 3 155 DEG C, districts, flange 145 DEG C, mouth mould 155 DEG C, extruder screw rotating speed is 50r/min, and extruder screw diameter is 45mm, L/D=20, whirlwind pelletizing, water cooling, pulling speed is 10r/min; Step 5, vacuum cooling is shaping, is evacuated by vacuum tank by means of vacuum pump, the inwall making pipe outer wall be adsorbed on shaping cover reaches cooling and shaping, the processing condition of Vacuum shaping are generally: vacuum tightness 55kPa, water temperature 20 DEG C, and the water in vacuum tank nebulizes as the best; Step 6, traction, the effect of towing mechanism is that the tubing extruded to head provides certain tractive force and pulling speed, draw tubing equably, and the wall thickness by regulating pulling speed to regulate pipe, pulling speed requires very even, and energy stepless time adjustment, pulling speed should than the linear velocity of tube extrusion slightly fast 15%; Step 7, cutting, tubing cross section must vertical and balance.
The color dot that in material kneaded in described step 2, Ying Wuwei scatters or unmixed good resin-oatmeal.The melt flow rate (MFR) of granulation in described step 3 for oxidation inhibitor described in 0.5 ~ 2g/10min can be three grades of butyl-4-methylphenols, two (3,5-tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3,5-, tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester etc.
The present embodiment adopts one package stabilizer to be liquid calcium zinc complexes.Lubricant is stearic acid, butyl stearate, oleylamide, ethylene bis stearamide etc., and the present embodiment adopts stearic acid.Weighting agent is calcium carbonate, potter's clay, talcum, diatomite, silicon-dioxide, mica powder, asbestos, metal, metal oxide etc., and the present embodiment adopts calcium carbonate.Tinting material is zinc powder (zinc oxide), cadmium red, ferric oxide, carbon black, chrome yellow, zinc yellow, the husky Huang of the Chinese, and the present embodiment adopts zinc powder.Whitening agent is coumarin type, benzo oxygen nitrogen type, and the present embodiment adopts benzo oxygen nitrogen type.Toughner is styrene butadiene thermoplasticelastomer, methyl methacrylate-divinyl-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, chlorinatedpolyethylene, ethylene-vinyl acetate copolymer, and the present embodiment adopts styrene butadiene thermoplasticelastomer.Stablizer is liquid barium zinc complexes.
The anti-aging PVC tubing prepared by embodiment 1-3 carries out mechanics properties testing, detecting according to being GB/T13663-2000, the results are shown in
table 1:
The anti-aging PVC tubing prepared by embodiment 1-3 carries out antibacterial test by QB/T2591-2003A " antibiotic plastic Anti-microbial Performance Tests method and antibacterial effect ".Before carrying out antibacterial test, first by print 100 DEG C of poach 5 hours, test bacterial classification is intestinal bacteria and denitrifying bacterium.
Concrete steps are as follows: to be dried, by for subsequent use for the bacteria suspension that bacterial classification sterilized water is diluted to proper concn with 75% ethanol disinfection process by testing sample.The bacteria suspension getting 0.22mL drops in sample surfaces, covers thereon with the polyethylene film that 0.1mm is thick, makes bacteria suspension between sample and film, form uniform liquid film.Relative humidity 90% is kept to cultivate 15 hours at 37 DEG C.With sterilized water, bacterium liquid is washed down, be diluted to suitable concentration gradient, get 0.1mL and be uniformly coated on the sterile agar culture that prepared.Cultivate 15 hours in 37 DEG C, observations.Negative control sterilized petri dishes replaces, and other operations are identical, antibacterium rate by the formulae discovery provided in standard, the antibiotic rate result obtained
as table
table 2for antibacterial ability effect:
The anti-aging PVC tubing antibacterial ability of the obvious embodiment of the present invention two, notched Izod impact strength, tensile strength, flexural strength, modulus in flexure, elongation at break and antibacterial ability are the best, longer service life, more anti-aging.
In sum, above-mentioned embodiment is not restricted embodiment of the present invention, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present invention or equivalent deformation, all at technology category of the present invention.
Claims (4)
1. an anti-aging PVC tubing manufacture method, is characterized in that: step one, and it is as follows that it respectively organizes weight percent: one package stabilizer 4-6 weight part, lubricant 0.5-1.5 weight part, weighting agent 7-8 weight part, tinting material 3 weight part, light calcium carbonate 8-10 weight part, titanium dioxide 6 weight part, whitening agent 3 weight part, toughner 2 weight part, stablizer 1-2 weight part, oxidation inhibitor 0.1-0.5 weight part, polyvinyl chloride resin 90-100 weight part; Step 2, the various raw material of accurate-metering, and drop in high-speed kneading machine in order, order of addition(of ingredients) is: polyvinyl chloride resin, one package stabilizer, lubricant, tinting material, weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor; Kneading is needed to add weighting agent, light calcium carbonate, titanium dioxide, whitening agent, toughner, stablizer and oxidation inhibitor again in 5 minutes after tinting material adds, when whole raw material reaches 120 DEG C-130 DEG C again after 15 minutes mediate, put into cooling and stirring machine, be cooled to 40 DEG C and shut down discharging; Step 3, granulation, tablets press each district temperature is: 1 70 DEG C-80 DEG C, district, and 2nd district are 140 DEG C-170 DEG C, 3rd district are 170 DEG C-180 DEG C, and head temperature controls at 170 DEG C-180 DEG C, 4 120 DEG C-135 DEG C, districts, 5th district are 140 DEG C-170 DEG C, and 6th district are 170 DEG C-190 DEG C, and 7th district are 190 DEG C-200 DEG C; Step 4, extrudes, and the temperature in each district of forcing machine is: 1 85 DEG C, district ± 5 DEG C, 2 130 DEG C, districts ± 5 DEG C, 3 150 DEG C, districts ± 5 DEG C, flange 140 DEG C ± 5 DEG C, mouth mould 150 ± 5 DEG C, extruder screw rotating speed is 50r/min, extruder screw diameter is 45mm, L/D=20, whirlwind pelletizing, water cooling, pulling speed is 10r/min; Step 5, vacuum cooling is shaping, is evacuated by vacuum tank by means of vacuum pump, and the inwall making pipe outer wall be adsorbed on shaping cover reaches cooling and shaping, and the processing condition of Vacuum shaping are generally: vacuum tightness 20.0-55kPa, water temperature 10-20 DEG C; Step 6, traction, the effect of towing mechanism is that the tubing extruded to head provides certain tractive force and pulling speed, draws tubing equably, and the wall thickness by regulating pulling speed to regulate pipe, pulling speed should than the linear velocity of tube extrusion 2%-15% slightly soon; Step 7, incising pipes.
2. anti-aging PVC tubing manufacture method according to claim 1, is characterized in that: the color dot that in material kneaded in described step 2, Ying Wuwei scatters or unmixed good resin-oatmeal.
3. anti-aging PVC tubing manufacture method according to claim 1, is characterized in that: the melt flow rate (MFR) of granulation in described step 3 is 0.5 ~ 2g/10min.
4. anti-aging PVC tubing manufacture method according to claim 1, it is characterized in that: described oxidation inhibitor can be three grades of butyl-4-methylphenols, two (3,5-tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3,5-, tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105670183A (en) * | 2016-04-14 | 2016-06-15 | 叶青 | Anti-aging rigid polyvinyl chloride pipe formula |
| CN107418083A (en) * | 2017-04-27 | 2017-12-01 | 安徽玉发塑业有限公司 | A kind of stability and durability pvc material and preparation method thereof |
| CN107474424A (en) * | 2017-08-02 | 2017-12-15 | 西藏加速工场孵化器有限公司 | Wearability PVC plastic and preparation method |
| CN109594692A (en) * | 2019-02-15 | 2019-04-09 | 潮州市猛犸象建材科技有限公司 | A kind of partition splicing type multifunctional wallboard and production method |
-
2015
- 2015-08-09 CN CN201510485477.8A patent/CN105061943A/en active Pending
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| Title |
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| 张玉龙等主编: "《塑料配方与制备手册（第二版）》", 30 June 2010, 化学工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105670183A (en) * | 2016-04-14 | 2016-06-15 | 叶青 | Anti-aging rigid polyvinyl chloride pipe formula |
| CN107418083A (en) * | 2017-04-27 | 2017-12-01 | 安徽玉发塑业有限公司 | A kind of stability and durability pvc material and preparation method thereof |
| CN107474424A (en) * | 2017-08-02 | 2017-12-15 | 西藏加速工场孵化器有限公司 | Wearability PVC plastic and preparation method |
| CN109594692A (en) * | 2019-02-15 | 2019-04-09 | 潮州市猛犸象建材科技有限公司 | A kind of partition splicing type multifunctional wallboard and production method |
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Application publication date: 20151118 |