CN107987353A - A kind of floor heating heating tube of low linear expansion coefficient and preparation method thereof - Google Patents
A kind of floor heating heating tube of low linear expansion coefficient and preparation method thereof Download PDFInfo
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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Abstract
Floor heating heating tube the invention discloses a kind of low linear expansion coefficient and preparation method thereof.It is 100 by mass ratio：0.76 1.08 matrix resin and auxiliary agent, is made through matrix resin drying, feeding, blending, the shaping of four-part form Single screw extrusion, argon gas vacuum sizing, sink cooling, compressed air purging, traction, Length-fixing cutting, coil pipe and crosslinking；Matrix resin is：HDPE, LDPE and PPR；Auxiliary agent is：Vinyltrimethoxysilane, cumyl peroxide, dibutyl tin laurate and antioxidant.Optimum performance matching is obtained using three kinds of matrix resin blendings, adds the excessive crosslinking that relatively low amount auxiliary agent inhibits tubing；Using the four-part form single screw extrusion machine compared with big L/D ratio, graft reaction efficiency is improved, by controlling temperature, humidity, time, hydrolytic crosslinking is more abundant.The tubing has high tenacity, high-ductility, low-expansion coefficient, and convenient construction, can be widely used in flooring radiation heating field.
Description
Technical field
The invention belongs to plastic pipe production technical field, and in particular to a kind of floor heating heating tube of low linear expansion coefficient and
Its preparation method.
Background technology
" Terrestrial ", is using hot water of the temperature not higher than 60 DEG C as heating agent, dark referred to as " floor heating "
It is embedded in the heating tube of below ground and circulates, heat whole floor, by ground to radiate the thermaltransmission mode with convection current
It is wide since the heating system has the advantages that hygienic, comfortable, energy saving, saving space to a kind of heating system of indoor heating
General application.According to People's Republic of China's professional standard《Radiant heating cooling technical regulation》(JGJ142-2012) regulation, is adopted
Floor heating heating tube is mostly plastic pipe, and crosslinked polyethylene (PE-X) pipe is a kind of overall plastic tubing of most common of which,
According to National Standard of the People's Republic of China《Hot and cold water crosslinked polyethylene pipe system part 2：Tubing》(GB/
T18992.2-2003 definition), this kind of tubing are divided into peroxide crosslinked polyethylene (PE-X by the difference of crosslinking processa) pipe
Material, organosilane crosslinked polyethylene (PE-Xb) tubing, electron beam crosslinking polyethylene (PE-Xc) tubing and azo crosslinked polyethylene (PE-
Xd) four type of tubing.
Silane crosslinking technology is polyethylene and vinyl silanes is made and can be handed over by graft reaction in screw extruder
The silane grafted polyethylene tubing of connection, then under the action of silanol polycondensation catalyst, hydrolyzes simultaneously polycondensation by it and is made and contains
The crosslinked polyethylene of Si-O-Si cross-bonds, forms a kind of 3 D stereo conformation in microstructure, after crosslinking, and it is resistance to assign tubing
The characteristic of high temperature and pressure.Current organosilane crosslinked polyethylene mainly for the production of cable insulating layer or production hot-water line.
Organosilane crosslinked polyethylene (PE-X at presentb) the more ripe production technology of tubing is generally divided into two-step method and one-step method.
Two-step method is that polyvinyl resin, silane, initiator and antioxidant, catalyst are prepared into two kinds of first, second in an extruder respectively
The masterbatch of component, tubing is made after then two kinds of masterbatch of first, second are mixed in another extruder by a certain percentage, then is carried out
Hydrolytic crosslinking reacts.One-step method is by raw material used such as polyvinyl resin, silane crosslinker, antioxidant, catalyst, peroxide
After compound initiator etc. measures respectively, mixture, heating plasticizing, grafting in an extruder is shaped to the polyethylene pipe of silane scion grafting
Material, then hydrolytic crosslinking.The performance of tubing is identical made from above two technique, but since process route is had any different, equipment
Difference, thus the application range in actual production is also different.Two-step process is since graft polymers and crosslinking being urged
Agent is individually prepared, and two kinds of compounding material have certain shelf-life, are not suitable for long-term storage, while add equipment throwing
Enter, add cost.In contrast, one-step method, because technological process is short, equipment investment is small, large-scale industry metaplasia is more advantageous to
Production.
In floor heating practice of construction, common heating tube outside diameter specification limit is 16mm-25mm, and whole coil pipe material non junction is in
Inflection type or parallel type are secretly embedded in floor, and laying spacing is 10-30cm, and therefore, corner, bending part largely exist, crosslinkable silane
Although it is plastic material to join polyethylene, but after crosslinking, molecular structure changes, than common polythene, deteriorated flexibility,
Elasticity modulus becomes larger, and makes tubing not pliable, and bending resistance is deteriorated, and the degree of cross linking is higher, and this shortcoming is more obvious, is constructing
In, constructional difficulties are easy to cause, if bending radius is too small, bending part " dead folding " can be caused, i.e., space narrows in pipe, influences heat supply
Effect, even results in leakage.Heating tube is buried in cement concrete under floor, and water temperature is generally 35-60 DEG C in pipe, the temperature difference
Scope is larger, if the linear expansion coefficient of tubing is higher, because change in size produces internal stress, then easily causes polygon ground phenomenon
Produce.Engineering practice proves that water temperature is higher, and heating tube is longer, and the temperature deformation of generation is bigger, and the probability for the generation that is cracked is higher.
Therefore, the degree of cross linking of organosilane crosslinked polyethylene heating tube and linear expansion coefficient cannot be excessive, otherwise can influence construction quality, but
Linear expansion coefficient is not all required in current product standard and job specfication, does not also have ceiling restriction to degree of cross linking index.
Chinese patent CN103275274 discloses a kind of single screw extrusion machine One-step production organosilane crosslinked polyethylene hot water
The method of hose, this method are that base polyethylene resin, silane crosslinker, graft initiator, crosslinking catalyst, antioxidant is multiple
Match somebody with somebody, the polyvinyl piping materials being grafted in three-stage single screw extrusion machine, 160-200 DEG C of built-in temperature, production internal diameter 8-
The crosslinked polyethylene hose of 10mm, extruded velocity are more than 40m/min, when successively crosslinking 7-10 is small in medium temperature, high-temperature-hot-water, obtain
To final products.This method does not require draw ratio, it is most likely that make stopping for material using common three-stage extruder
Stay distribution wide, and the complete melting zone relative length of material is shorter, also there are solid conveying section to the defeated of solid-liquid mixing system
The problem such as send efficiency low.Extruded velocity is very big at the same time, although improving production capacity, can bring side effect, i.e., melt is in extruder
In residence time it is too short, influence grafting efficiency.Silane crosslinker addition is excessive in this method, has been up to 5kg, significantly
Cost is added, after silane charge reaches certain value, graft reaction tends to saturation, and cross-linking reaction is very slow, and the degree of cross linking is several
No longer change, therefore cause huge waste.
Chinese patent CN101323174 discloses a kind of production method of silane crosslinked polyethylene pipes, is a kind of two-step method
Technique, its raw materials for production are made of organosilane crosslinked polyethylene, initiator, processing aid, by vented single -screw extruder into
Type, crosslinking process realize that the tubing degree of cross linking produced using the formula is up to 72% using water-boiling method, in addition to the degree of cross linking,
Other performance indicator situations are not referred in the documents.
Above-mentioned two patents and other patents or document on organosilane crosslinked polyethylene at the same time, are mostly that production is general
Hot-water line or cable, do not studied for floor heating heating tube, also do not accounted for floor heating heating tube for the degree of cross linking
With the requirement of linear expansion coefficient.
The content of the invention
It is an object of the invention to a kind of floor heating heating of low linear expansion coefficient is provided for above-mentioned defect
Pipe and preparation method thereof.It is blended using three kinds of matrix resins and reduces functional aid total amount, it is suppressed that the excessive friendship of tubing
Connection；Using the four-part form single screw extrusion machine with compared with big L/D ratio, graft reaction efficiency is improved, and combine production technology
Other improvements, make the floor heating heating tube of preparation not only have excellent high temperature resistant, high voltage performance；Also there is relatively low line to expand
Coefficient, can prevent polygon ground；Plasticity index is excellent, convenient construction；Do not give a discount at small-bend radius inflection, ensure that safety makes
With.
The technical scheme is that：A kind of floor heating heating tube of low linear expansion coefficient, it is characterized in that, by matrix resin and
Auxiliary agent is made；The mass ratio of matrix resin and auxiliary agent is 100：0.76-1.08；
The component and parts by weight of matrix resin be：85-90 parts of HDPE, 5.0-7.5 parts of LDPE, 5.0-7.5 parts of PPR；
The component and parts by weight of auxiliary agent be：0.20-0.40 parts of vinyltrimethoxysilane, cumyl peroxide
0.030-0.040 parts, 0.50-0.60 parts of dibutyl tin laurate, 0.030-0.040 parts of antioxidant 1010.
The nominal outside diameter of the floor heating heating tube is 16-32mm.
The preparation method of the floor heating heating tube of the low linear expansion coefficient, it is characterized in that, it does including (1) matrix resin
It is dry；(2) feeding；(3) it is blended；(4) four-part form Single screw extrusion is molded；(5) argon gas vacuum sizing；(6) sink cools down；(7) press
Contracting air purges；(8) draw；(9) Length-fixing cutting；(10) coil pipe；(11) it is crosslinked；(12) examine；(13) pack.
Step (1) matrix resin is dried：Matrix resin is dried, fully to remove the moisture in resin,
Prevention material is crosslinked in advance in an extruder, it is desirable to dry to water content≤50ppm, it is preferred that and drying temperature is 92-95 DEG C,
Drying time is 1.5-2.0h/t.
Step (4) the four-part form Single screw extrusion is shaped to：By matrix resin and auxiliary agent after feeding, blending, mix
Material extrusion molding in four-part form single screw rod extruder after conjunction；Wherein four-part form single screw rod extruder, which is divided into, adds
Expect totally 4 sections of section, melt zone, homogenizing zone and conversion zone.Its screw diameter >=80mm, wherein screw slenderness ratio >=30, feeding section temperature
Spend for 180-185 DEG C, melt zone temperature is 200-210 DEG C, and homogenizing zone temperature is 210-220 DEG C, and conversion zone temperature is 225-230
DEG C, head temperature is 225-230 DEG C.
Step (5) the argon gas vacuum sizing is：Material after the reaction of step (4) conversion zone is reacted in four-part form single screw rod
The high temperature head argon gas vacuum sizing of extruder, vacuum is 1.2-1.5bar in argon gas vacuum sizing.
Step (7) compressed air purging is：Quick drying tubing is produced because crossing water cooling (sink cooling) in outer surface
Raw attached water, compressed air pressure 3.5-4.0bar.
The step (8) is drawn：Tubing after compressed air purging is again using traction machine travel, hauling speed 15-
20m/min。
The step (11) is crosslinked：Tubing after Length-fixing cutting, coil pipe uses vapor crosslinking method, in crosslinking case
In be crosslinked, wherein crosslinking humidity >=90%, crosslinking temperature be 90-95 DEG C, crosslinking time 4.5-6.0h.
Beneficial effects of the present invention are：The floor heating heating tube formula design of the present invention mainly considers three factors：Tubing produces
Technic index and relatively low cost of the performance indicator, tubing required in product standard in installing and using.Matrix in formula
Resin is total to using three kinds of high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE), atactic copolymerized polypropene (PPR) resins
Mixed, the addition of LDPE and PPR, can improve the plasticity index of heating tube, can improve bending property, it is swollen can also to substantially reduce line
Swollen coefficient, HDPE only account for the 85-90% of matrix resin, can effectively control the degree of cross linking to prevent from being excessively crosslinked to optimum value, so that
Make tubing can high temperature high voltage resistant, there is good high temperature creep property, also there is higher plasticity index.
Floor heating heating tube prepared by the present invention, degree of cross linking 65-70%, linear expansion coefficient≤2.5 × 10-6/℃-1, fracture
Elongation >=800%, 180 ° clod wash radius r≤6d, longitudinal welds≤5 ‰, in hydrostatic tension 2.5MPa, test temperature
110 DEG C, crack-free, ne-leakage under test period 8760h, meet hot and cold water crosslinked polyethylene pipe system part 2：Pipe
Material》(GB/T18992.2-2003) the indices requirement of standard.
In preparation method process route of the present invention, the effect difference of each committed step is as follows：Formula uses three kinds of bases
Body resin alloy, is to obtain the matching of optimum performance.The various functions auxiliary agent of addition and its effect are：Peroxidating two is different
The effect of propyl benzene is to be heated to decomposite free radical, triggers the deoxygenation of matrix resin, and vinyltrimethoxysilane plays grafting
Effect, the effect of dibutyl tin laurate is catalytic crosslinking, and the effect of antioxidant 1010 is to ensure material in process
The stability in use of stability and manufactured goods, suppresses oxidative degradation, improves service life.According to weight ratio, above-mentioned four kinds of auxiliary agents
Total addition is no more than 1.08kg, has the advantages that both sides, has not only inhibited the excessive crosslinking of tubing, but also greatly reduces into
This.Matrix resin is dried, fully to remove the moisture in resin, prevention material is crosslinked, uses in advance in an extruder
Four-part form single screw extrusion machine with compared with big L/D ratio, can be such that resin fully melts and can extend stop in an extruder
Time, improves graft reaction efficiency；Using larger screw diameter, production capacity can be increased, improve production efficiency.Adopted in high temperature head
It is 1.2-1.5bar argon gas vacuum sizings with vacuum, can accurately controls tubing nominal outside diameter and wall thickness dimension, can also be significantly
Reducing high temperature precipitate etc. influences the generation of tube surfaces quality surface defect.It is quickly to dry up using compressed air purging tubing
The attached water that tubing is produced because crossing water cooling in outer surface；Moderate hauling speed be ensure grafting efficiency and yield it is crucial because
Element, it is too low to be easy to cause material the residence time is long in an extruder, material aging is even produced accessory substance, it is excessive to easily cause
Melting is uneven and is grafted the problems such as insufficient, wall thickness diminishes；When the three big factors for influencing cross-linking reaction are temperature, humidity, crosslinking
Between, temperature determines the activity of strand and the severe degree of cross-linking reaction, and humidity determines the speed of siloxanes hydrolysis rate, hands over
It is not linear relationship to join time and the degree of cross linking, after the degree of cross linking reaches a certain level, is no longer raised.
The present invention solves the constructional difficulties of organosilane crosslinked polyethylene floor heating heating tube, difficulty safe to use and higher cost
Topic, improves the deficiency of current technology by varying material prescription and preparation process.Using high density polyethylene (HDPE) (HDPE), low-density
Three kinds of polyethylene (LDPE), atactic copolymerized polypropene (PPR) resin alloys, improve the plasticity index of tubing, significantly reduce line
The coefficient of expansion；Add less functional aid and inhibit the excessive crosslinking of tubing, and greatly reduce cost；Using with compared with
The four-part form single screw extrusion machine of big L/D ratio, can be such that resin fully melts and can extend the residence time in an extruder,
Improve graft reaction efficiency；Vacuum is used as 1.2-1.5bar argon gas vacuum sizings in high temperature head, can accurate control pipe
Material nominal outside diameter and wall thickness dimension, can also greatly reduce high temperature precipitate etc. influences the generation of tube surfaces quality surface defect.
Crosslinking temperature, humidity, time technological parameter are controlled, the product degree of cross linking is reached optimal parameter.
To sum up, the purpose of the present invention is producing a kind of organosilane crosslinked polyethylene heating tube for being suitable as floor heating, fully examine
Consider requirement (plasticity, linear expansion coefficient, anti-bending strength etc.) of the floor heating for heating tube, it is more in formula design and processing technology etc.
Aspect is improved, so as to obtain a kind of degree of cross linking, linear expansion coefficient, elongation at break, clod wash radius and longitudinal welds etc.
The floor heating heating tube of technical indicator function admirable, can be widely used in flooring radiation heating field.
Embodiment
Below by embodiment, the present invention will be described in detail.
Embodiment 1
The floor heating heating tube for the low linear expansion coefficient that nominal outside diameter is 16mm, nominal wall thickness is 1.8mm.
The formula of heating tube：HDPE：85kg；LDPE:7.5kg；PPR:7.5kg；Vinyltrimethoxysilane：
0.40kg；Cumyl peroxide：0.035kg；Dibutyl tin laurate：0.50kg；Antioxidant 1010：0.040kg.
Committed step and the key parameter for preparing above-mentioned heating tube are as follows：
(1) matrix resin is dried, drying temperature：95 DEG C, drying time：1.9h/t.
(2) four-part form Single screw extrusion is molded, screw diameter：80mm, screw slenderness ratio：30, feeding section temperature is 185
DEG C, melt zone temperature is 208 DEG C, and homogenizing zone temperature is 217 DEG C, and conversion zone temperature is 230 DEG C, and head temperature is 230 DEG C.
(3) argon gas vacuum sizing, vacuum 1.4bar.
(4) compressed air purging, compressed air pressure 3.5bar.
(5) draw, hauling speed：20m/min.
(6) it is crosslinked, is crosslinked humidity：90%, crosslinking temperature：90 DEG C, crosslinking time：4.5h.
Embodiment 2
The floor heating heating tube for the low linear expansion coefficient that nominal outside diameter is 20mm, nominal wall thickness is 1.9mm.
The formula of heating tube is：HDPE：90kg；LDPE:5.0kg；PPR:5.0kg；Vinyltrimethoxysilane：
0.20kg；Cumyl peroxide：0.040kg；Dibutyl tin laurate：0.60kg；Antioxidant 1010：0.030kg.
Committed step and the key parameter for preparing above-mentioned heating tube are as follows：
(1) matrix resin is dried, drying temperature：92 DEG C, drying time：1.5h/t.
(2) four-part form Single screw extrusion is molded, screw diameter：85m, screw slenderness ratio：35, feeding section temperature is 180 DEG C,
Melt zone temperature is 210 DEG C, and homogenizing zone temperature is 210 DEG C, and conversion zone temperature is 225 DEG C, and head temperature is 225 DEG C.
(3) argon gas vacuum sizing, vacuum 1.2bar.
(4) compressed air purging, compressed air pressure 4.0bar.
(5) draw, hauling speed：15m/min.
(6) it is crosslinked, is crosslinked humidity：95%, crosslinking temperature：95 DEG C, crosslinking time：6.0h.
Embodiment 3
The floor heating heating tube for the low linear expansion coefficient that nominal outside diameter is 25mm, nominal wall thickness is 2.3mm.
The formulation weight of heating tube is than composition：HDPE：87.5kg；LDPE:5.5kg；PPR:7.0kg；Vinyl front three
Oxysilane：0.37kg；Cumyl peroxide：0.032kg；Dibutyl tin laurate：0.55kg；Antioxidant 1010：
0.035kg。
Committed step and the key parameter for preparing above-mentioned heating tube are as follows：
(1) matrix resin is dried, drying temperature：94 DEG C, drying time：1.8h/t.
(2) four-part form Single screw extrusion is molded, screw diameter：90mm, screw slenderness ratio：35, feeding section temperature is 182
DEG C, melt zone temperature is 205 DEG C, and homogenizing zone temperature is 212 DEG C, and conversion zone temperature is 228 DEG C, and head temperature is 230 DEG C.
(3) argon gas vacuum sizing, vacuum 1.3bar.
(4) compressed air purging, compressed air pressure 3.6bar.
(5) draw, hauling speed：19m/min.
(6) it is crosslinked, is crosslinked humidity：92%, crosslinking temperature：91 DEG C, crosslinking time：5.5h.
Embodiment 4
The floor heating heating tube for the low linear expansion coefficient that nominal outside diameter is 32mm, nominal wall thickness is 2.9mm.
The formula of heating tube is：HDPE：89kg；LDPE:5.5kg；PPR:5.5kg；Vinyltrimethoxysilane：
0.25kg；Cumyl peroxide：0.038kg；Dibutyl tin laurate：0.58kg；Antioxidant 1010：0.039kg.
Committed step and the key parameter for preparing above-mentioned heating tube are as follows：
(1) matrix resin is dried, drying temperature：92 DEG C, drying time：1.7h/t.
(2) four-part form Single screw extrusion is molded, screw diameter：100mm, screw slenderness ratio：40, feeding section temperature is 185
DEG C, melt zone temperature is 208 DEG C, and homogenizing zone temperature is 220 DEG C, and conversion zone temperature is 229 DEG C, and head temperature is 230 DEG C.
(3) argon gas vacuum sizing, vacuum 1.4bar.
(4) compressed air purging, compressed air pressure 3.9bar.
(5) draw, hauling speed：15m/min.
(6) it is crosslinked, is crosslinked humidity：92%, crosslinking temperature：93 DEG C, crosslinking time：6.0h.
Comparative example 1：Using the formula and critical process in embodiment in CN103275274 1, utilized using one-step technology
Three-stage single screw extrusion machine, prepares nominal outside diameter 16mm, the crosslinked with silicane floor heating heating tube of nominal wall thickness 1.8mm.
Comparative example 2：Vinyltrimethoxysilane addition of the parts by weight for 2.0kg is used, remaining is the same as in embodiment 2
Formula and critical process, prepare nominal outside diameter 20mm, the crosslinked with silicane floor heating heating tube of nominal wall thickness 1.9mm.
Comparative example 3：All using HDPE resin, remaining is prepared matrix resin with the formula and critical process in embodiment 4
The crosslinked with silicane floor heating heating tube of nominal outside diameter 32mm, nominal wall thickness 2.9mm.
The main performance index of the floor heating heating tube for the low linear expansion coefficient that table 1 is prepared for the embodiment of the present invention, the degree of cross linking
It is worth basis《Crosslinked polyethylene (PE-X) tubing and the test method of the pipe fitting degree of cross linking》(GB/T18474-2001) detect；Fracture is stretched
Long rate according to《Thermoplastic plastic pipe tensile property measures third portion：Polyolefin pipe》(GB/T8804.3-2003) detect；
Longitudinal welds according to《The measure of thermoplastic plastic pipe longitudinal welds》Oven test method in (GB/T 6671-2001)
Measure；The assay method of linear expansion coefficient according to《The measure quartz dilatometer method of -30 DEG C of linear expansion coefficients of plastics -30 DEG C》(GB/
T1036-2008) measure, measuring temperature is 20 DEG C -60 DEG C.
180 ° of cold bending test references《Medical high polymer hose physical property test method》(GB/T15812-1995) and《Gold
Belong to pipe bend test method》(GB/T244-2008) test, at room temperature, the total cross-section floor heating that a nominal outside diameter is d is added
Heat pipe material is bent around a radius for the flexual center of r (r=6d) and trough of belt, and angle of bend is 180 °, criterion of acceptability be tubing not
Give a discount.
In addition to above-mentioned performance indicator, other performances of the floor heating heating tube of low linear expansion coefficient manufactured in the present embodiment are equal
Meet National Standard of the People's Republic of China《Hot and cold water crosslinked polyethylene pipe system part 2：Tubing》(GB/
T18992.2-2003 the associated specifications in).
The performance indicator of table 1 embodiment 1-4 and comparative example 1-3
As it can be seen from table 1 using the floor heating heating tube of low linear expansion coefficient produced by the invention, high temperature high voltage resistant, is handed over
Connection degree is moderate, has high tenacity, the mechanical property of high-ductility, convenient construction, high temperature deformation is small, and cost is low, can be widely used in
Flooring radiation heating field, compared with prior art, the present invention having significant progress.
Claims (10)
1. a kind of floor heating heating tube of low linear expansion coefficient, it is characterized in that, it is made of matrix resin and auxiliary agent；Matrix resin is with helping
The mass ratio of agent is 100：0.76-1.08；
The component and parts by weight of matrix resin be：85-90 parts of HDPE, 5.0-7.5 parts of LDPE, 5.0-7.5 parts of PPR；
The component and parts by weight of auxiliary agent be：0.20-0.40 parts of vinyltrimethoxysilane, cumyl peroxide 0.030-
0.040 part, 0.50-0.60 parts of dibutyl tin laurate, 0.030-0.040 parts of antioxidant 1010.
2. a kind of floor heating heating tube of low linear expansion coefficient according to claim 1, it is characterized in that, the floor heating heating tube
Nominal outside diameter be 16-32mm.
3. the preparation method of the floor heating heating tube of the low linear expansion coefficient described in claim 1 or 2, it is characterized in that, it includes：
(1) matrix resin is dried；(2) feeding；(3) it is blended；(4) four-part form Single screw extrusion is molded；(5) argon gas vacuum sizing；(6) water
Groove cools down；(7) compressed air purging；(8) draw；(9) Length-fixing cutting；(10) coil pipe；(11) it is crosslinked；(12) examine；(13) wrap
Dress.
4. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 3, it is characterized in that, the step
(1) matrix resin is dried, it is desirable to dry to water content≤50ppm.
5. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 4, it is characterized in that, drying temperature
For 92-95 DEG C, drying time 1.5-2.0h/t.
6. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 3, it is characterized in that, the step
(4) screw diameter >=80mm in the shaping of four-part form Single screw extrusion, screw slenderness ratio >=30, wherein feeding section temperature are 180-
185 DEG C, melt zone temperature is 200-210 DEG C, and homogenizing zone temperature is 210-220 DEG C, and conversion zone temperature is 225-230 DEG C, head
Temperature is 225-230 DEG C.
7. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 3, it is characterized in that, the step
(5) vacuum is 1.2-1.5bar in argon gas vacuum sizing.
8. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 3, it is characterized in that, the step
(7) compressed air pressure is 3.5-4.0bar in compressed air purging.
9. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 3, it is characterized in that, the step
(8) hauling speed of traction is 15-20m/min.
10. the preparation method of the floor heating heating tube of low linear expansion coefficient according to claim 3, it is characterized in that, the step
Suddenly humidity >=90% is crosslinked in (11) crosslinking, crosslinking temperature is 90-95 DEG C, crosslinking time 4.5-6.0h.
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| CN201711306698.XA CN107987353B (en) | 2017-12-11 | 2017-12-11 | Floor heating pipe with low linear expansion coefficient and preparation method thereof |
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| CN201711306698.XA CN107987353B (en) | 2017-12-11 | 2017-12-11 | Floor heating pipe with low linear expansion coefficient and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876706A (en) * | 2005-06-10 | 2006-12-13 | 上海高分子功能材料研究所 | Silane crosslinked polyethylene plastic for low shrinkage anti-crack tube and its preparation method |
| CN104231413A (en) * | 2014-09-16 | 2014-12-24 | 安徽美腾特种电缆材料有限公司 | Low-retraction one-step process silane crosslinked polyethylene insulation material |
| CN105906926A (en) * | 2016-07-06 | 2016-08-31 | 吴江佳通光缆有限公司 | High-strength polyethylene tube for communication and preparation method thereof |
| CN107446217A (en) * | 2017-09-25 | 2017-12-08 | 常州市绿意管道有限公司 | A kind of Pressure-tolerant polyethylene tubular product |
-
2017
- 2017-12-11 CN CN201711306698.XA patent/CN107987353B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876706A (en) * | 2005-06-10 | 2006-12-13 | 上海高分子功能材料研究所 | Silane crosslinked polyethylene plastic for low shrinkage anti-crack tube and its preparation method |
| CN104231413A (en) * | 2014-09-16 | 2014-12-24 | 安徽美腾特种电缆材料有限公司 | Low-retraction one-step process silane crosslinked polyethylene insulation material |
| CN105906926A (en) * | 2016-07-06 | 2016-08-31 | 吴江佳通光缆有限公司 | High-strength polyethylene tube for communication and preparation method thereof |
| CN107446217A (en) * | 2017-09-25 | 2017-12-08 | 常州市绿意管道有限公司 | A kind of Pressure-tolerant polyethylene tubular product |
Non-Patent Citations (3)
| Title |
|---|
| 中国管材年鉴编委会: "《中国管材年鉴》", 31 October 2001 * |
| 吴培熙等: "《聚合物共混改性》", 31 August 2017 * |
| 张广成等: "硅烷交联聚乙烯的研究", 《西北工业大学学报》 * |
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