CN1253503C - Incombustion composite plastic and preparation process thereof - Google Patents
Incombustion composite plastic and preparation process thereof Download PDFInfo
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- CN1253503C CN1253503C CN 200410021588 CN200410021588A CN1253503C CN 1253503 C CN1253503 C CN 1253503C CN 200410021588 CN200410021588 CN 200410021588 CN 200410021588 A CN200410021588 A CN 200410021588A CN 1253503 C CN1253503 C CN 1253503C
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Abstract
The present invention relates to fire-retardant composite plastic and a manufacturing method thereof, which comprises the following raw materials: polyvinyl chloride (PVC) as base materials, light calcium carbonate as filling materials, superfine asbestos powder, impact modifier CPE, processing modifier ACR, stearic acid as surface treating agents, trlbasic lead sulphate as heat stabilizer, calcium stearate, lead stearate, titanium pigment as light stabilizer, liquid paraffin as Internal lubricant, solid paraffin as external lubricant, magnesium hydroxide as smoke suppression filling/flame retardant, and phosphotriester (2, 3-dichloropropyl) as persistent flame retardant, all raw materials are selected and weighed according to a certain proportion, added into a hot mixing kneader for mechanical mixing modification, discharged to a cold mixer to cool to room temperature, and thus, the finished product is obtained. The present invention has the advantages of reasonable mixing of the raw materials, and simple preparation method. Compared with the similar products made of fluoroplastic, the products such as heat-insulating cushion (bracket), etc. which are made of the plastic has the advantages of high bearing strength, aging resistance, fire resistance, low cost, and complete satisfaction of integrate requirements to steel pipeline construction of systematic engineering of a central air conditioner.
Description
Technical field
The present invention relates to a kind of modified plastics that is exclusively used in the building engineering construction material, particularly a kind of difficulty combustion composite plastic and manufacture method thereof that is used for making the mat insulation (holder) of central air conditioner system engineering.Be applicable to that also making other has the plastic component of flame retardant property requirement.
Background technology
At present, for satisfying the steel pipe construction requirement of the central air conditioner system engineering in all kinds of construction works, regulation by standard GB 50243-2002 " code for acceptance of construction quality of conditioning works ", installation for steel pipe should meet the following requirements, be between hot and cold water pipe of air-conditioning and airduct pipeline and support, the suspension bracket, mat insulation or adiabatic holder should be arranged.For a long time, adopt traditional wooden dunnage that adiabatic face and bearing surface are arranged as insulating liners for the installation between the hot and cold water pipe of air-conditioning and airduct pipeline and support, the suspension bracket always.Although apt to rot, the moisture-sensitive of this wooden dunnage is extensive because of its raw material sources, light weight is inexpensive, good heat-insulation effect, temporarily there is not new material to replace, so in the standard of new correction, stipulate that wooden dunnage still can be made insulating liners after rotproofing.But the shortcoming of the maximum of its existence is exactly not prevent fires, and can't solve the problem of fundamentally eliminating disaster hidden-trouble.The kind of existing general-purpose plastics and engineering plastics is more, divides from its combustioncharacteristics, and kinds such as inflammable, fire-retardant, that difficulty is fired, do not fired are arranged.But the steel pipe construction requirement that meets the central air conditioner system engineering, and the difficulty that the bearing resistance that can satisfy pipeline weight requires is fired, the adiabatic plastics of non-combustible hard, surely belong to difficult combustion plastics, as PVC (polyvinyl chloride) and non-combustible plastics, as PTFE (tetrafluoroethylene) etc.Because PVC is a general-purpose plastics, though cost is lower, difficult combustion, but its thermostability, flowability, photostabilization and bearing resistance are relatively poor, and exhaust gas volumn is big, and be easily aging, not modification do not meet the composite request of the steel pipe construction of central air conditioner system engineering, so can't be used; PTFE thermotolerance height, bearing resistance height, ageing-resistant meet construction requirement, but its manufacturing cost height also influences its application.
Summary of the invention
The purpose of this invention is to provide a kind of difficult combustion composite plastic and manufacture method thereof, it has raw material and is mixed rationally, the advantage that preparation technology is easy, with its mat insulation of making products such as (holders), the bearing resistance height, ageing-resistant, difficult combustion is compared with the like product that fluoroplastics are made, significantly reduce cost, satisfy the composite request of the steel pipe construction of central air conditioner system engineering fully.
The object of the present invention is achieved like this: this difficulty combustion composite plastic selects for use raw material to comprise base-material PVC, filler light calcium carbonate, ultra-fine asbestos powder, impact modifier CPE, modifier ACR, surface treatment agent stearic acid, thermo-stabilizer three salt, calcium stearate, lead stearate, photostabilizer titanium dioxide, internal lubricant whiteruss, external lubricant solid paraffin, smoke-inhibiting flame retardant agent magnesium hydroxide, persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) ester, take by weighing according to quantity and join in the mixed kneader of heat, carry out the mechanical blending modification, difficult combustion composite plastic gets product; The each component weight ratio is in the blend: PVC: light calcium carbonate: ultra-fine asbestos powder: CPE: ACR: stearic acid: three salt: calcium stearate: lead stearate: titanium dioxide: whiteruss: solid paraffin: magnesium hydroxide: tricresyl phosphate (2,3-two chloropropyls) ester=100: 14-20: 13-30: 5-12: 3-7: 0.4-0.8: 5-10: 0.6-1.2: 0.6-1.2: 2-5: 0.2-0.6: 0.6-1.2: 20-28: 4-8.
What described base-material PVC adopted is SG-5 type suspension pvc resin.
Also have oxidation inhibitor 2 in the described blend, the 6-tertiary butyl-4-methyl powder, the weight ratio of itself and base-material PVC is 0.4-1: 100.
Also have the coupling agent Magnesium Stearate in the described blend, the weight ratio of itself and base-material PVC is 1-1.5: 100.
Also have the plasticization modifier dioctyl phthalate (DOP) in the described blend, the weight ratio of itself and base-material PVC is 2.5-5: 100.
Also have the fluorochrome DISPERSE YELLOW in the described blend, the weight ratio of itself and base-material PVC is 0.4-0.6: 100.
The manufacture method of described difficult combustion composite plastic is: after the each component of above-mentioned raw materials is taken by weighing by formula ratio, earlier with light calcium carbonate, ultra-fine asbestos powder, stearic acid, titanium dioxide, whiteruss, magnesium hydroxide is inserted in the mixed kneader of heat and is mixed, blend, be warming up to 50 ℃, under the temperature of 50 ℃ of maintenances, again with PVC, CPE, ACR, three salt, calcium stearate, lead stearate, 2, the 6-tertiary butyl-4-methyl powder, solid paraffin is inserted heat and is mixed in the kneader, continue blend, be warming up to 85 ℃, at last with tricresyl phosphate (2,3-two chloropropyls) ester is inserted in the mixed kneader of heat, continue blend, be warming up to 120 ℃, discharging is cooled to normal temperature to cold mixer then, be the difficult combustion of finished product composite plastic, packed for standby use.
In the described method, when adding the light calcium carbonate component, also take by weighing coupling agent Magnesium Stearate or fluorochrome DISPERSE YELLOW and insert heat and mix in the kneader and mix, blend, be warming up to 50 ℃ by formula ratio.
In the described method, when adding base-material PVC component, also take by weighing oxidation inhibitor 2 by formula ratio, the 6-tertiary butyl-4-methyl powder or plasticization modifier dioctyl phthalate (DOP) are inserted heat and are mixed in the kneader and mix, and blend, are warming up to 85 ℃.
Because the base-material PVC in the blend composition of the present invention, has significant especially unstable to heat, rheological property and with the excellent compatibility of high component softening agent and filler, so select a certain amount of subsidiary material to come rational Match, mix kneader by heat, carry out the mechanical blending modification, make full use of the raw material sources that each component the had performance complementary advantage extensively and in the blend process that participates in modification, as add impact modifier chlorinatedpolyethylene (CPE), modifier acrylic acid esters co-polymer (ACR), be easy to improve the flowability of melt, make its temperature distribution more even, also can improve the performance of stablizer and lubricant simultaneously, improve resistance to impact shock; Add surface treatment agent stearic acid (H-St) and can improve filler light calcium carbonate (CaCO
2) activity and avidity; Add thermo-stabilizer three salt (3PbPbSO
4), calcium stearate (Ca-St), lead stearate (Pb-St), can utilize cooperation therebetween, bring into play its synergistic effect, outstanding thermostable effect, make the thermotolerance and the forming process of PVC mixed ingredients better, effectively prevent the degraded that it is caused by heat-flash and forceful action in the course of processing; Adding photostabilizer titanium dioxide (TiO
2) time, as adding oxidation inhibitor 2 again, the 6-tertiary butyl-4--methyl powder (264) just can produce good synergistic, prevents the photooxidation droping and the thermo-oxidative ageing of PVC mixed ingredients; Add the internal lubricant whiteruss, be commonly called as white oil, can reduce intermolecular friction, lubricating efficiency in improving; Add the external lubricant solid paraffin, be called native paraffin again, strengthen the external lubrication effect, improve product surface gloss, be beneficial to the demoulding, in addition, the adding of inside and outside lubricant has also overcome the relatively poor defective of oilness of three salt; Add the ultra-fine asbestos powder of uninflammability reinforcing filler, smoke-inhibiting flame retardant agent magnesium hydroxide (Mg (OH)
2), persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) ester etc., mix kneader through heat, carry out the mechanical blending modification, difficult combustion composite plastic gets product.Manufacture method of the present invention is easy and simple to handle, raw material sources are extensive, with its mat insulation of making products such as (holders), the bearing resistance height, ageing-resistant, difficult combustion is compared with the like product that fluoroplastics are made, and significantly reduces cost, also can make product obtain desired flame retardant property simultaneously, and have good toughness and good advantages such as smoke suppressing effect.
For further improving the over-all properties of the difficult combustion of finished product composite plastic, in above-mentioned blend, also can add an amount of coupling agent Magnesium Stearate (Mg-St), with the strongthener interface binding power, add a small amount of plasticization modifier dioctyl phthalate (DOP) (DOP), with the flowability that improves material etc.After adding an amount of fluorochrome DISPERSE YELLOW (FFL), can obviously improve the aesthetic appearance of making product.
According to actual service requirements, the above-mentioned reasonable raw material that is mixed is made difficult combustion composite plastic, make as the steel pipe of central air conditioner system engineering with it again and construct with mat insulation (holder), substitute traditional through antiseptic wooden dunnage, both a large amount of timber can be saved, the disaster hidden-trouble of central air conditioner system can also be fundamentally thoroughly eliminated.Mat insulation (holder) product made from the difficult combustion of the present invention composite plastic of etc.ing, bearing resistance height not only, ageing-resistant, difficulty is fired, and compares with the like product that fluoroplastics are made, and significantly reduces cost.This mat insulation (holder) is pressed GB8624-1997 " Classification on burning behaviour for building materials " check through national fixed fire extinguishing system and fire retarding component quality supervision and test center, and the result shows that combustionproperty reaches the GB8624B1 level; Through national building materials industry room construction material quality supervision and test test center, press the GB/T10002.3-1996 standard test, its every performance index, as thermal conductivity, transverse pressure, longitudinal pressure, axial bearing capacity etc., all reach and be better than national standard, satisfy the composite request of the steel pipe construction of central air conditioner system engineering fully.
Embodiment
It is following that the present invention is further illustrated according to embodiment.
The difficulty combustion composite plastic that embodiment one preparation caliber is used for the DN20-40 stereoplasm tube
The difficulty combustion of using according to reality requires and every performance index, considers raw materials used salient features, range of application and mutual synergistic effective performance thereof and the working method of mixed ingredients, preferred each component, and take by weighing by formula ratio: base-material PVC
SG5100 parts, 20 parts of filler light calcium carbonates, 30 parts of ultra-fine asbestos powders (seven grades), 4 parts of 5 parts of impact modifier CPE, modifier ACR, 0.8 part of surface treatment agent stearic acid, 5 parts of thermo-stabilizer three salt, 0.6 part of calcium stearate, 0.6 part of lead stearate, 4 parts of photostabilizer titanium dioxides, 0.2 part of internal lubricant whiteruss, 0.6 part of external lubricant solid paraffin, 24 parts of smoke-inhibiting flame retardant agent magnesium hydroxides, 8 parts of persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) esters.The concrete operations step is: earlier light calcium carbonate, ultra-fine asbestos powder, stearic acid, titanium dioxide, whiteruss, magnesium hydroxide are inserted heat and mix in the kneader and mix, blend, be warming up to 50 ℃.Under the condition of 50 ℃ of maintenances, again PVC, CPE, ACR, three salt, calcium stearate, lead stearate, solid paraffin are inserted heat and mix in the kneader, continue blend, be warming up to 85 ℃, at last with tricresyl phosphate (2,3-two chloropropyls) ester is inserted in the mixed kneader of heat, continues blend, is warming up to 120 ℃.Discharging is cooled to normal temperature to cold mixer then, promptly awkward combustion composite plastic, packed for standby use.
The difficulty combustion composite plastic that embodiment two preparation calibers are used for the DN50-100 stereoplasm tube
According to the difficulty combustion requirement that reality is used, considers raw materials used salient features, range of application and mutual synergistic effective performance thereof and the working method of mixed ingredients, preferred each component, and take by weighing by formula ratio: base-material PVC
SG5100 parts, 14 parts of filler light calcium carbonates, 24 parts of ultra-fine asbestos powders (seven grades), other 8 parts of impact modifier CPE, 7 parts of modifier ACR, 0.6 part of surface treatment agent stearic acid, 7 parts of thermo-stabilizer three salt, calcium stearate 1.2,1.2 parts of lead stearates, 5 parts of photostabilizer titanium dioxides, oxidation inhibitor 2, the 6-tertiary butyl-1 part in 4--methyl powder, internal lubricant whiteruss 0.6,1.2 parts of external lubricant solid paraffins, 28 parts of smoke-inhibiting flame retardant agent magnesium hydroxides, 4 parts of persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) esters.The concrete operations step is: earlier light calcium carbonate, ultra-fine asbestos powder, stearic acid, titanium dioxide, whiteruss, magnesium hydroxide are inserted heat and mix in the kneader and mix, blend, be warming up to 50 ℃.Under the condition of 50 ℃ of maintenances, again with PVC, CPE, ACR, three salt, calcium stearate, lead stearate, 2, the 6-tertiary butyl-4-methyl powder, solid paraffin are inserted heat and are mixed in the kneader, continue blend, be warming up to 85 ℃.At last tricresyl phosphate (2,3-two chloropropyls) ester is inserted heat and mix in the kneader, continue blend, be warming up to 120 ℃.Discharging is cooled to normal temperature to cold mixer then, promptly awkward combustion composite plastic, packed for standby use.
The difficulty combustion composite plastic that embodiment three preparation calibers are used for the DN20-100 stereoplasm tube
According to the difficulty combustion requirement that reality is used, consider raw materials used salient features, range of application and mutual synergistic effective performance thereof and the working method of mixed ingredients, take by weighing by formula ratio: base-material PVC
SG5100 parts, 18 parts of filler light calcium carbonates, 13 parts of ultra-fine asbestos powders (seven grades), 12 parts of impact modifier CPE, 3 parts of modifier ACR, 0.4 part of surface treatment agent stearic acid, 10 parts of thermo-stabilizer three salt, calcium stearate 0.6, lead stearate 0.6,3 parts of photostabilizer titanium dioxides, oxidation inhibitor 2,0.4 part of the 6-tertiary butyl-4--methyl powder, 0.3 part of internal lubricant whiteruss, coupling agent Magnesium Stearate 1,0.8 part of external lubricant solid paraffin, 5 parts of plasticization modifier DOP, 0.4 part of fluorochrome DISPERSE YELLOW, 20 parts of smoke-inhibiting flame retardant agent magnesium hydroxides, 6 parts of persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) esters.The concrete operations step is: earlier light calcium carbonate, ultra-fine asbestos powder, stearic acid, titanium dioxide, whiteruss, Magnesium Stearate, magnesium hydroxide, DISPERSE YELLOW are inserted hot mixing in the kneader and mixed, blend is warming up to 50 ℃.Under the condition of 50 ℃ of maintenances, again with PVC, CPE, ACR, three salt, calcium stearate, lead stearate, 2, the 6-tertiary butyl-4-methyl powder, solid paraffin, DOP insert heat and mix in the kneader, continue blend, be warming up to 85 ℃.At last tricresyl phosphate (2,3-two chloropropyls) ester is inserted heat and mixes in the kneader,, continue blend, be warming up to 120 ℃.Discharging is cooled to normal temperature to cold mixer then, promptly awkward combustion composite plastic, packed for standby use.
The difficulty combustion composite plastic that embodiment four preparation calibers are used for the DN20-100 stereoplasm tube
According to the difficulty combustion requirement that reality is used, considers raw materials used salient features, range of application and mutual synergistic effective performance thereof and the working method of mixed ingredients, preferred each component, and take by weighing by formula ratio: base-material PVC
SG5100 parts, 16 parts of filler light calcium carbonates, 16 parts of ultra-fine asbestos powders (seven grades), 9 parts of impact modifier CPE, 4 parts of modifier ACR, 0.5 part of surface treatment agent stearic acid, 9 parts of thermo-stabilizer three salt, 0.9 part of calcium stearate, 0.9 part of lead stearate, 2 parts of photostabilizer titanium dioxides, oxidation inhibitor 2,0.6 part of the 6-tertiary butyl-4-methyl powder, internal lubricant whiteruss 0,4 parts, 1.5 parts of coupling agent Magnesium Stearates, 0.9 part of external lubricant solid paraffin, 2.5 parts of plasticization modifier DOP, 0.6 part of fluorochrome DISPERSE YELLOW, 26 parts of smoke-inhibiting flame retardant agent magnesium hydroxides, 5 parts of persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) esters.The concrete operations step is: earlier light calcium carbonate, ultra-fine asbestos powder, stearic acid, titanium dioxide, whiteruss, Magnesium Stearate, magnesium hydroxide, DISPERSE YELLOW are inserted heat and mixed in the kneader and mix, blend, be warming up to 50 ℃.Under the condition of 50 ℃ of maintenances, again with PVC, CPE, ACR, three salt, calcium stearate, lead stearate, 2, the 6-tertiary butyl-4-methyl powder, solid paraffin, DOP insert heat and mix in the kneader, continue blend, be warming up to 85 ℃.At last tricresyl phosphate (2,3-two chloropropyls) ester is inserted heat and mix in the kneader, continue blend, be warming up to 120 ℃.Discharging is cooled to normal temperature to cold mixer then, promptly awkward combustion composite plastic, packed for standby use.
Embodiment five is made difficult combustion composite plastic mat insulation
The blend composition that embodiment one-four makes is inserted the twin screw extruder that has mixing section and mould of plastics, by the patent No. be: the operation steps of 02132699.1 " plastics mat insulation and working method thereof ", the machine barrel of controlling this machine heats each section temperature at 185,190,195,188 ℃, behind the extruder head, enter the mould of plastics head, temperature is controlled at 185,188,182 ℃, carries out vacuum sizing, water-cooled, moulding then, through being cut into mat insulation.Utilize this method, be equipped with corresponding Pipe making mold, also can process the difficulty combustion composite plastic pipe of other specification.
Claims (9)
1, a kind of difficult combustion composite plastic, it is characterized in that: select for use raw material to comprise base-material PVC, the filler light calcium carbonate, ultra-fine asbestos powder, impact modifier CPE, modifier ACR, the surface treatment agent stearic acid, thermo-stabilizer three salt, calcium stearate, lead stearate, the photostabilizer titanium dioxide, the internal lubricant whiteruss, the external lubricant solid paraffin, smoke-inhibiting flame retardant agent magnesium hydroxide, persistence fire retardant tricresyl phosphate (2,3-two chloropropyls) ester, take by weighing according to quantity and join in the mixed kneader of heat, carry out the mechanical blending modification, promptly get difficult combustion composite plastic, the each component weight ratio is in the blend: PVC: light calcium carbonate: ultra-fine asbestos powder: CPE: ACR: stearic acid: three salt: calcium stearate: lead stearate: titanium dioxide: whiteruss: solid paraffin: magnesium hydroxide: tricresyl phosphate (2,3-two chloropropyls) ester=100: 14-20: 13-30: 5-12: 3-7: 0.4-0.8: 5-10: 0.6-1.2: 0.6-1.2: 2-5: 0.2-0.6: 0.6-1.2: 20-28: 4-8.
2, difficult combustion composite plastic according to claim 1, it is characterized in that: what described base-material PVC adopted is SG-5 type suspension pvc resin.
3, difficult combustion composite plastic according to claim 1 is characterized in that: also have oxidation inhibitor 2 in the described blend, and the 6-tertiary butyl-4-methyl powder, the weight ratio of itself and base-material PVC is 0.4-1: 100.
4, difficult combustion composite plastic according to claim 1 is characterized in that: also have the coupling agent Magnesium Stearate in the described blend, the weight ratio of itself and base-material PVC is 1-1.5: 100.
5, difficult combustion composite plastic according to claim 1 is characterized in that: also have plasticization modifier DOP in the described blend, the weight ratio of itself and base-material PVC is 2.5-5: 100.
6, difficult combustion composite plastic according to claim 1 is characterized in that: also have the fluorochrome DISPERSE YELLOW in the described blend, the weight ratio of itself and base-material PVC is 0.4-0.6: 100.
7, manufacture method according to the described difficult combustion composite plastic of claim 1, it is characterized in that: after described each component is taken by weighing by formula ratio, earlier with light calcium carbonate, ultra-fine asbestos powder, stearic acid, titanium dioxide, whiteruss, magnesium hydroxide is inserted in the mixed kneader of heat and is mixed, blend, be warming up to 50 ℃, under the temperature of 50 ℃ of maintenances, again with PVC, CPE, ACR, three salt, calcium stearate, lead stearate, solid paraffin is inserted heat and is mixed in the kneader, continue blend, be warming up to 85 ℃, at last with tricresyl phosphate (2,3-two chloropropyls) ester is inserted in the mixed kneader of heat, continue blend, be warming up to 120 ℃, discharging is cooled to normal temperature to cold mixer then, promptly get difficult combustion composite plastic, packed for standby use.
8, according to the described difficult manufacture method of firing composite plastic of claim 7, it is characterized in that: when adding the light calcium carbonate component, also take by weighing coupling agent Magnesium Stearate or fluorochrome DISPERSE YELLOW and insert heat and mix in the kneader and mix, blend, be warming up to 50 ℃ by formula ratio.
9, according to the described difficult manufacture method of firing composite plastic of claim 7, it is characterized in that: when adding base-material PVC component, also take by weighing oxidation inhibitor 2 by formula ratio, the 6-tertiary butyl-4-methyl powder or plasticization modifier DOP insert heat and mix in the kneader and mix, and blend, are warming up to 85 ℃.
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| CN 200410021588 CN1253503C (en) | 2004-07-30 | 2004-07-30 | Incombustion composite plastic and preparation process thereof |
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| CN 200410021588 CN1253503C (en) | 2004-07-30 | 2004-07-30 | Incombustion composite plastic and preparation process thereof |
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| CN1253503C true CN1253503C (en) | 2006-04-26 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102443232A (en) * | 2010-10-09 | 2012-05-09 | 苏州工业园区鑫丰林塑料科技有限公司 | Preparing, mixing and processing process for chlorinated polyvinyl chloride |
| CN102443223A (en) * | 2010-10-09 | 2012-05-09 | 苏州工业园区鑫丰林塑料科技有限公司 | Shock-resisting mixed base material |
| CN102127275B (en) * | 2011-03-16 | 2012-11-14 | 上海元琦能源科技发展有限公司 | Composition for flame-retardant polyvinyl chloride (PVC) plastic foam board, product prepared from same, and preparation method thereof |
| CN102336980A (en) * | 2011-05-27 | 2012-02-01 | 湖北众联塑业有限公司 | Processing modifier for polyvinyl chloride cable material |
| CN102382476B (en) * | 2011-09-30 | 2013-01-02 | 中国人民解放军第三军医大学第三附属医院 | Room-temperature plastic deformation material and manufacturing method thereof |
| CN102504447B (en) * | 2011-12-09 | 2013-08-28 | 重庆鸽牌电工材料有限公司 | Low-smoke low-halogen flame-retardant threading pipe material and manufacture method |
| CN102977519B (en) * | 2012-12-11 | 2014-12-03 | 浙江大学 | Guide rail plastic special for filter presses and processing method for guide rail plastic |
| CN104277352A (en) * | 2013-07-11 | 2015-01-14 | 郎溪县恒通塑业有限公司 | Fire-proof flame-retardant PVC pipe |
| CN110423419A (en) * | 2019-08-16 | 2019-11-08 | 青海大学 | The preparation method of uvioresistant and the PVC composite material of anti-fire performance enhancement |
| CN112029209A (en) * | 2020-08-24 | 2020-12-04 | 山东博拓新材料科技股份有限公司 | PVC (polyvinyl chloride) skinning foaming high-flame-retardant dustproof wear-resistant ceiling board and preparation method thereof |
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