CN1338368A - Silencing composite plastic pipe and its preparing process and equipment - Google Patents
Silencing composite plastic pipe and its preparing process and equipment Download PDFInfo
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- CN1338368A CN1338368A CN 01127188 CN01127188A CN1338368A CN 1338368 A CN1338368 A CN 1338368A CN 01127188 CN01127188 CN 01127188 CN 01127188 A CN01127188 A CN 01127188A CN 1338368 A CN1338368 A CN 1338368A
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- composite plastic
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- described silencing
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Abstract
A silencing composite plastic pipe is composed of internal and external layers of polyolefine plastics and sandwich layer of polyolefine plastics filled with CaCO3, talc powder and BaSO4, and is made up through three-layer co-extruding dies installed on two or three single-screw extruders. Its advantages include light weight, low cost, simple preparing process and long service life. It can be used to cold or hot water drainage at 70-97 deg.C with high sound insulation effect.
Description
Technical field
The present invention relates to a kind of improved silencing composite plastic pipe and preparation method and equipment.
Background technology
Widely used downpipe, downcomer in building a building, a kind of is plastics solid wall pipes such as PVC, PP, PE, solid wall pipe noise when drowning is bigger, brings discordant noise for quiet environment.For reducing drowning noise, so people design the PVC drainpipe of inner wall belt helix, as described in Chinese patent 95228531, rely on the drainage of spiral inner wall line, reduce flow velocity, reduce noise drowning and that gas collisions reaches and the tube wall bump causes, thereby play certain noise reduction effect.But this downpipe easily produces water burst to water (as indoor drainage) suddenly to be impacted, and noise reduction is not good.The PVC three composite, water-drain hush pipes that Chinese patent 98238600,99214749 disclosed another kinds are made up of the hard foamed core layer of same material, by compound composition of internal layer of the hard skin of PVC, fine and closely woven closed pore foamed core layer, inner wall belt projection spiral stream guidance line, by the foamed core layer sound insulation and noise reduction.This core layer foaming that constitutes by PVC material of the same race and the draining hush pipe of inner wall belt spiral stream guidance line, its defective is: need to use double screw extruder production, and hard foamed core layer is nonelastic, soundproof effect is still undesirable, can produce harmful smog during the burning of PVC material, environment is had certain influence.And above-mentioned high molecular polymer drainpipe can only be used for the cold water draining, and temperature tolerance is poor.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of good muffling effect is provided, light weight, price is low, and environmentally friendly harmless, makes the simple silencing composite plastic pipe of processing.
Another object of the present invention is to provide a kind of and can do the cold water draining, can make the silencing composite plastic pipe of hot water draining again.
Another purpose of the present invention is to provide a kind of preparation method of above-mentioned silencing composite plastic pipe.
A further object of the present invention is to provide a kind of equipment for preparing above-mentioned silencing composite plastic pipe.
The object of the invention realizes that main the improvement is that the inside and outside layer of multiple tube adopts one or both TPO plastics, and one or more are then filled as CaCo so that polyolefin is high in the intermediate layer
3, talcum powder, BaSo
4Inorganic particles is a raw material.Specifically, silencing composite plastic pipe of the present invention comprises high molecular polymer internal layer, skin and intermediate layer, it is characterized in that said internal layer, skin are the TPO plastics, and the intermediate layer is the high CaCo of filling of polyolefin plastics
3, talcum powder, BaSo
4Inorganic particles one or two or more kinds.This multiple tube is owing to have enough elasto-plasticitys, thereby sound absorption function is preferably arranged, and noise reduction is obvious, and low price, light weight, and processing and manufacturing is simple, environmental sound, and recyclablely utilize again.
The high inorganic particles loading of filling of the present invention is at least more than 30%, and for reducing cost, the inorganic particles loading can account for the 30-75% of compound, wherein is preferably 50-60%, and the inorganic particles particle diameter is excellent with the 800-1000 order.Silencing composite plastic pipe of the present invention, general service is as only doing the cold water draining, and inside and outside layer and intermediate core layer base-material can adopt any polyolefin; But consider weatherability and hear resistance, inside and outside layer especially with the modified polypropene PP-H, the PP-B that adopt the heatproof good weatherability, PP-C for well, be best with PP-C again wherein, low price, economical and practical, good rigidity; The intermediate core layer polyolefin base material is best with random polypropylene aPP powder, and the interlayer compatibility is good like this, the bonding strength height.For effectively guaranteeing intensity, rigidity and the sound absorption qualities of tubing, outer layered material should be selected elastic modulus E 〉=1000N/mm for use
2, be preferably E 〉=1500N/mm
2Polyolefin modified or PP Pipe Compound; Interior layered material should be selected elastic modulus E=800-1000N/mm for use
2Polyolefin modified or PP Pipe Compound; The intermediate layer compound should be selected elastic modulus E 〉=2000N/mm for use
2-3500N/mm
2For reducing cost, sandwich layer polyolefin base material of the present invention can use reclaimed materials.
Be to improve sound absorption, sound insulation and noise reduction effect, in the silencing composite plastic pipe of the present invention or outer layer thickness with respectively be the 1/8-1/3 of total wall thickness for well, and interior layer thickness should be less than outer layer thickness.The present invention further improves sound absorption, soundproof effect, also can add a certain amount of thermoplastic elastomer (TPE) such as EP rubbers, polybutadiene, butyl rubber, polyvinyl acetate copolymer, metallocene-plastomer etc. in the sandwich layer compound, to strengthen toughening effect, make soundproof effect better, noise reduction can reach the 15-30 decibel.As required, silencing composite plastic pipe internal layer inwall of the present invention also can be provided with spiral stream guidance groove (line).Be the difference serviceability, silencing composite plastic pipe of the present invention, inside and outside layer can be by painted to show difference.Colorize method can be mixed Masterbatch in advance and is mixed in the raw material, and also quantitatively feed mode and major ingredient feed extruder simultaneously, but method is to be prefabricated into band chromogen material with the raw material blend preferably.
The present invention makes the inorganic particles of adding and polyolefin that good compatible the mixing can be arranged, should be to the inorganic particles that adds with molecule interface activation coupling agent with help coupling agent to activate, and it is standby to join in the basestocks mixing granulation again.The intermediate core layer compound by the compounding of each composition, is adjusted its elastic modulus E 〉=2000N/mm
2-3500N/mm
2, can effectively guarantee best sound-absorbing, soundproof effect like this.The core layer material elastic modulus E is too small, and sound-absorbing effect descends; Elastic modulus E is excessive, and tubing rigidity can be affected.
Silencing composite plastic pipe preparation of the present invention, adopt two or three extruders through the moulding of three-layer co-extruded compound die coextrusion head, be effectively to guarantee that product quality and higher production efficiency, extruder of the present invention preferably adopt spiro rod length and machine barrel internal diameter than being the single screw extrusion machine of 28-33.Machine barrel adopts the fluting machine barrel, the preferred zigzag of fluting form, square type straight trough or spiral flute profile, the preferred 3.5 times of machine barrel internal diameters of slotting length and slope angle, the slope angle of slotting by 5 ° transfer to＜1 °.Screw rod adopts two rank multistage barrier decompression type kneading screws, its geometry, the preferred feed zone spiral shell square＜screw diameter that adopts, subsequent segment spiral shell square＞screw diameter, said subsequent segment comprises changeover portion, the auxilliary screw thread barrier screen of band, metering section, shearing mixing section and metering mixer.The length of the feed zone of screw rod, changeover portion, the auxilliary screw thread barrier screen of band, metering section, shearing mixing section, metering mixer is about about 18%, 16%, 35%, 10%, 6% and 15% of screw rod total length respectively; Feed zone spiral shell square is preferably 0.8-0.9 times of screw diameter, spiral groove depth is preferably 0.1-0.16 times of screw diameter, compression ratio is preferential＞0-＜2 between, subsequent segment pitch is preferably 1.1-1.3 times of screw diameter, and the gap that the auxilliary screw thread of auxilliary screw thread barrier screen and machine barrel internal diameter form is preferably 0.008-0.01 times of screw diameter.
Silencing composite plastic pipe of the present invention, owing to adopt polyolefin modified material, especially polypropylene to make inside and outside layer, and the high mixed C aCo that fills of polyolefin
3, talcum powder, BaSo
4Inorganic fillings is done the intermediate layer, and toughening modifying in addition.Not only raw material is drawn materials easily, and waste material can directly reclaim makes the intermediate layer base-material, has light weight, cost low (can accomplish similar or lower) to the polyvinyl-chloride drainage pipe price, low price, manufacturing equipment and technology are simple, do not contain environmentally harmful halogen composition, environmentally friendly harmless, pipeline connects easy construction; And sound absorption, soundproof effect are good, and noise reduction reaches the 15-30 decibel, effectively reduces drowning noise, long service life, and high-temperature resistant can reach 97 ℃, uses 70 ℃ of heatproofs for a long time.The employing single screw extrusion machine is produced, and technology is simple, reduced investment.Spiro rod length compares for the single screw extrusion machine of 28-33, two rank multistage barrier decompression type kneading screws and fluting machine barrel with the machine barrel internal diameter, has effectively guaranteed product quality, has high production efficiency.
The specific embodiment
Below, further specify summary of the invention by several embodiments of the present invention.
Example 1: with commercial sign melt index MFI is 190/2.16≤0.3/10 minute, elastic modulus E 〉=1500N/mm
2Polypropylene modification or PP Pipe Compound PP-C (as the BA2021 of Borealis, the B8101 of Yan Hua company) make outer layered material, be prefabricated into colorant with 1.5% Masterbatch blend; Elastic modulus E=800-1000N/mm
2Polypropylene modification or PP Pipe Compound PP-H or PP-B or PP-R do in layered material, be prefabricated into colorant with 1.5% Masterbatch blend; With 50 parts of PP (Yan Hua company or Maoming petrochemical industry produce) powder with 50 parts through coupling agent and the CaCo that helps coupling agent to activate
3Ultra-fine (800-1000 order) powder, an amount of plasticized modifier EPDM and other auxiliary agents such as fire retardant etc., add together to stir in the compounding groove and mix, through the double screw extruder granulation, obtain characterizing melt index MFI 190/2.16 between 0.5-1.5/10 divides again, proportion is at 1.2-1.5g/cm
3Between, elastic modulus E 〉=2500N/mm
2Intermediate core layer mix pellet.With above-mentioned outer, in, interior layered material adds respectively in three single screw extrusion machine charging systems, material is compressed in extruder separately, fusion, homogenizing and extrude, send into three helical layer co-extrusion die head co-extrusions and become the three-layer composite pipe base, get final silencing composite plastic pipe through vacuum sizing, cooling, traction, cutting and online or off-line enlarging.Single screw extrusion machine screw diameter and draw ratio are two groups of φ 65, L/D=30 and one group of φ 90, L/D=33, respectively with zigzag and square type straight trough fluting machine barrel, 3.5 times of machine barrel internal diameters of slotting length and slope angle, the fluting slope angle by 5 ° transfer to＜0.3 °, two rank multistage barrier decompression type kneading screws, feed zone spiral shell square is 0.85 times of screw diameter, 0.14 times of screw diameter of spiral groove depth, compression ratio 1.5, subsequent segment spiral shell square are 1.25 times of screw diameters, the screw feed section, changeover portion, the auxilliary screw thread barrier screen of band, metering section, shear mixing section, the length of metering mixer is about 18% of screw rod total length respectively, 16%, 35%, 10%, about 6% and 15%; 0.01 times of screw diameter in gap that the auxilliary screw thread of auxilliary screw thread barrier screen and machine barrel internal diameter form.Extrude productive rate and reach 1.6kg/rpm/h and 4.5kg/rpm/h respectively.The co-extrusion die head of adapted mouth mould ∮ 52.5 * 2, ∮ 78.75 * 2.6, ∮ 111.5 * 3.4, ∮ 168 * 4.9, ∮ 210 * 5.6 specifications, produce the noise reduction composite plastic pipe of φ 50 * 2, ∮ 75 * 2.6, ∮ 110 * 3.4, ∮ 160 * 4.9, ∮ 200 * 5.6, with ∮ 160 * 4.9 tubing is example, internal layer wall thickness 0.65mm, outer wall thickness 0.8mm, sandwich layer wall thickness 3.45mm.97 ℃ of the highest use heatproofs are used 70 ℃ of heatproofs for a long time, are used for indoor hot and cold water draining, and noise is 32dBA.
Embodiment 2: the sandwich layer base-material is selected for use example 1 inside and outside layered material to finish modification and without the powder of granulation, is added CaCo
3Superfine powder and talcum powder mixing granulation, base-material is 40: 60 with the ratio of inorganic material.
Embodiment 3: as embodiment 1,2, the regeneration PP powder with 30% (weight) in the sandwich layer base-material replaces virgin material.
Embodiment 4: embodiment as described above, the sandwich layer base-material all adopts the reclaimed materials of multiple tube, adds 30% aforementioned inorganic particles and an amount of plasticized modifier.
The silencing composite plastic pipe that the various embodiments described above are produced, performance are close substantially.
The specific embodiment of the invention not departing from basic technical scheme of the present invention, can have suitable change, still belongs to protection domain of the present invention.Can adopt high density polyethylene, low density polyethylene, medium density polyethylene MDPE, HMW(high molecular weight)-high density polyethylene HWM-HDPE and compound thereof as inside and outside layered material, polypropylene and copolymer, polyvinyl acetate copolymer etc.; Sandwich layer still can adopt said polyolefins, or crosslinked polyethylene or polybutene, heat-proof polythene (PE-RT), PP-R; Inorganic particles can add more than one, and base-material and inorganic little material proportioning can be: 70-25%: 30-75%;
Claims (16)
1, a kind of silencing composite plastic pipe comprises high molecular polymer internal layer, skin and intermediate layer, it is characterized in that said internal layer, skin are the TPO plastics, and the intermediate layer is the high CaCo of filling of polyolefin plastics
3, talcum powder, BaSo
4Inorganic particles one or two or more kinds.
2,, it is characterized in that said inorganic particles particle diameter is the 800-1000 order according to the described silencing composite plastic pipe of claim 1.
3,, it is characterized in that said inorganic particles loading accounts for the 30-75% of compound according to claim 1 or 2 described silencing composite plastic pipes.
4,, it is characterized in that said inorganic particles loading is 50-60% according to the described silencing composite plastic pipe of claim 3.
5,, it is characterized in that the polyolefin of said inside and outside layer and intermediate layer base-material is a modified polypropene according to the described silencing composite plastic pipe of claim 1.
6,, it is characterized in that the elastic modulus E 〉=1000N/mm of said outer polyolefin material according to the described silencing composite plastic pipe of claim 1
2, the elastic modulus E=800-1000N/mm of internal layer polyolefin material
2, the elastic modulus E 〉=2000N/mm of sandwich layer compound
2-3500N/mm
2
7,, it is characterized in that said inside and outside layer thickness respectively is the 1/8-1/3 of gross thickness, and interior layer thickness is less than outer layer thickness according to the described silencing composite plastic pipe of claim 1.
8,, it is characterized in that in the said sandwich layer compound thermoplastic elastomer being arranged according to the described draining silencing composite plastic pipe of claim 1.
9, the preparation method of the described silencing composite plastic pipe of a kind of claim 1, it is characterized in that making earlier the sandwich layer compound, feed the extruder coextrusion mold respectively with inside and outside layered material then, the preparation of said sandwich layer compound, with the inorganic particles that adds with molecule interface activation coupling agent with help coupling agent to activate, mix with polyolefin again, obtain elastic modulus E 〉=2000N/mm
2-3500N/mm
2The mixing pellet.
10, a kind of single screw extrusion machine for preparing the described silencing composite plastic pipe of claim 1 is characterized in that said spiro rod length and machine barrel internal diameter ratio are 28-33, and said machine barrel is the fluting machine barrel, and said screw rod is two rank multistage barrier decompression type kneading screws.
11, according to the single screw extrusion machine of the described silencing composite plastic pipe of claim 10, it is characterized in that said machine barrel slotting length and slope angle are 3.5 times of machine barrel internal diameters, the fluting slope angle by 5 ° transfer to＜1 °.
12,, it is characterized in that the feed zone spiral shell square＜screw diameter of said two rank multistage barrier decompression type kneading screws, subsequent segment spiral shell square＞screw diameter according to the single screw extrusion machine of the described silencing composite plastic pipe of claim 10.
13, according to the single screw extrusion machine of claim 10 or 12 described silencing composite plastic pipes, it is characterized in that said screw rod subsequent segment comprises changeover portion, the auxilliary screw thread barrier screen of band, metering section, shearing mixing section and metering mixer, each segment length is about 18%, 16%, 35%, 109,6% and 15% of screw rod total length respectively.
14, according to the single screw extrusion machine of the described silencing composite plastic pipe of claim 12, it is characterized in that said screw feed section spiral shell square is a 0.8-0.9 times of screw diameter, spiral groove depth is a 0.1-0.16 times of screw diameter, compression ratio is＞0-＜2.
15,, it is characterized in that the auxilliary screw thread of auxilliary screw thread barrier screen of said screw rod subsequent segment and the gap of machine barrel internal diameter are 0.008-0.01 times of screw diameter according to the single screw extrusion machine of the described silencing composite plastic pipe of claim 13.
16,, it is characterized in that said screw rod subsequent segment pitch is 1.1-1.3 times of screw diameter according to the single screw extrusion machine of the described silencing composite plastic pipe of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127188 CN1338368A (en) | 2001-09-06 | 2001-09-06 | Silencing composite plastic pipe and its preparing process and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127188 CN1338368A (en) | 2001-09-06 | 2001-09-06 | Silencing composite plastic pipe and its preparing process and equipment |
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| CN1338368A true CN1338368A (en) | 2002-03-06 |
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|---|---|---|---|
| CN 01127188 Pending CN1338368A (en) | 2001-09-06 | 2001-09-06 | Silencing composite plastic pipe and its preparing process and equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100586996C (en) * | 2003-01-23 | 2010-02-03 | 三星阿托菲纳株式会社 | Sound-absorbing polypropylene resin composition containing nanoclay |
| CN102313084A (en) * | 2011-09-02 | 2012-01-11 | 王井洋 | Three-layer noise reduction drainage pipe and manufacture method thereof |
| CN102336966A (en) * | 2011-08-17 | 2012-02-01 | 安徽广德金鹏科技发展有限公司 | Noise-damping pipe |
| CN103788464A (en) * | 2013-12-26 | 2014-05-14 | 阳业东 | Soundproof material and preparation process thereof |
| CN103834077A (en) * | 2014-02-27 | 2014-06-04 | 上海新安汽车隔音毡有限公司 | Manufacturing method of equidensite elastomer sound insulation material in different thickness for vehicle |
| CN103883812A (en) * | 2014-03-12 | 2014-06-25 | 青岛恒瑞塑料科技有限责任公司 | Inside spin type high-temperature-resisting ultra-quiet drainage pipe and manufacturing method thereof |
-
2001
- 2001-09-06 CN CN 01127188 patent/CN1338368A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100586996C (en) * | 2003-01-23 | 2010-02-03 | 三星阿托菲纳株式会社 | Sound-absorbing polypropylene resin composition containing nanoclay |
| CN102336966A (en) * | 2011-08-17 | 2012-02-01 | 安徽广德金鹏科技发展有限公司 | Noise-damping pipe |
| CN102313084A (en) * | 2011-09-02 | 2012-01-11 | 王井洋 | Three-layer noise reduction drainage pipe and manufacture method thereof |
| CN103788464A (en) * | 2013-12-26 | 2014-05-14 | 阳业东 | Soundproof material and preparation process thereof |
| CN103834077A (en) * | 2014-02-27 | 2014-06-04 | 上海新安汽车隔音毡有限公司 | Manufacturing method of equidensite elastomer sound insulation material in different thickness for vehicle |
| CN103883812A (en) * | 2014-03-12 | 2014-06-25 | 青岛恒瑞塑料科技有限责任公司 | Inside spin type high-temperature-resisting ultra-quiet drainage pipe and manufacturing method thereof |
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