CN106397725B - Utilize recycling waste hard polyurethane foam production insulating tube material, insulating tube and production method - Google Patents
Utilize recycling waste hard polyurethane foam production insulating tube material, insulating tube and production method Download PDFInfo
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- CN106397725B CN106397725B CN201610771354.5A CN201610771354A CN106397725B CN 106397725 B CN106397725 B CN 106397725B CN 201610771354 A CN201610771354 A CN 201610771354A CN 106397725 B CN106397725 B CN 106397725B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Insulating tube material is made using recycling waste hard polyurethane foam the present invention relates to a kind of, insulating tube and production method, include following components: the polyether polyol of 80-90 parts by weight, the Product liquid oligomer polyol mixture of the waste polyurethane rigid foam glycolysis of 10-20 parts by weight, 1.0-1.5 the water of parts by weight, 1.5-3.0 the surfactant of parts by weight, the response type amine catalyst of 0.4-1.5 parts by weight, the conventional amine catalyst of 0.3-1 parts by weight, the crosslinking agent of 0-1.5 parts by weight: the foaming agent of 30-50 parts by weight: and black material is the polymeric MDI system isocyanate of 145-150 parts by weight.The present invention reduces pollution to environment, realizes recycling for resource, such that waste hard polyurethane foam recovery using production insulating tube, and reduces production cost.
Description
Technical field
Recycling waste hard polyurethane foam production insulating tube material, insulating tube and system are utilized the present invention relates to a kind of
Make method, is used for central heating network.
Background technique
Continuous improvement with people to environmental consciousness realizes the reasonable of resource especially in today of sustainable development
It utilizes, has been mentioned important strategic height.Rigid polyurethane foam is a kind of thermosetting property of tridimensional network
Material.It due to its excellent performance, is widely used, is caused so as to cause the waste hard polyurethane foam of generation
Pollution to environment.
Traditional processing method one is that bury one be to burn to soil, and either which method is all to cause dirt to environment
Dye wastes resource again simultaneously.If waste polyurethane foam plastics are recycled, it is possible to reduce the pollution to environment is realized
Resource recycles and environmentally protective theory.
The rigid polyurethane foam material important as one kind, the reasonable recycling and reusing to its waste product, no
It is only capable of being effectively protected environment and reducing pollution and resource can be saved turning waste into wealth, but also there is significant social benefit and warp
The effective measure of benefit of helping and heating energy-saving.Therefore the recycling to waste hard polyurethane foam makes finished product
(insulating tube etc.) has become world today's problem most in the urgent need to address.
Summary of the invention
The present invention devise it is a kind of using recycling waste hard polyurethane foam production insulating tube material, insulating tube and
The technical issues of production method, solution is that waste hard polyurethane foam does not have not by optimal utilization in the prior art
By its use into central heating network technology in insulating tube.
In order to solve above-mentioned technical problem, present invention employs following scheme:
It is a kind of to make insulating tube material using recycling waste hard polyurethane foam, it is characterised in that: according to weight point
Number is counted, the waste polyurethane hard bubble of the polyether polyol, 10-20 parts by weight in raw material comprising following components 80-90 parts by weight
The Product liquid oligomer polyol mixture of foam plastics glycolysis, the water of 1.0-1.5 parts by weight, 1.5-3.0 parts by weight surface
Activating agent, the response type amine catalyst of 0.4-1.5 parts by weight, the conventional amine catalysts of 0.3-1 parts by weight, 0-1.5 parts by weight
Crosslinking agent: the foaming agent of 30-50 parts by weight: the black material is the polymeric MDI system isocyanate of 145-150 parts by weight.
Further, the Product liquid oligomer polyol mixture of the waste polyurethane rigid foam glycolysis is by giving up
Rigid polyurethane foam in the following proportions puts into waste polyurethane rigid foam in reaction kettle after broken crusher machine,
Alcoholysis agent is added, 150-220 degrees Celsius obtained by reaction 8-10 hours under the action of alcoholysis agent；Wherein, waste polyurethane hard
The weight ratio of foamed plastics and alcoholysis agent is 2:1.Alcoholysis agent is diethylene glycol, and manufacturer is Beijing Chemical Plant.
Above-mentioned reaction mechanism: in the common presence of alcoholysis agent and catalyst (existing catalyst in waste polyurethane foam)
Under, the urethane bond in polyurethane is broken, whole to replace key reaction formula as follows by short alcohol chain:
-R1-NH-CO-O-R2+HO-R3-OH→R1-NH-CO-O-R3- OH, wherein R1、R2It is all carbamate groups, R3
For alcoholysis agent group.
Alcoholysis method itself is the polyalcohol that polyurethane waste material is re-used to synthesis of polyurethane material, the liquid that can be re-used
Body oligomer still has certain reactivity, can directly react with isocyanates, so alternative a series of for synthesizing
Polyurethane products, to realize the recycling of raw material.
Waste polyurethane rigid foam can be directly added into white material after crushing and use, but be only limited to manual operations, because crushing
The light volume of foam wt afterwards is big, increases the viscosity of white material, is limited by machine pump, filter, head, and block pumps, mistake are easy
Filter, head use so cannot be placed in high pressure casting machine.It can be direct after being liquid after alcoholysis and being mixed with other components
For equipment.
The purpose that recycling waste polyurethane rigid foam carries out glycolysis is rigid polyurethane foam as a kind of
Important material, the reasonable recycling and reusing to its waste product can not only be effectively protected environment and reduce pollution and can save
Resource-saving is turned waste into wealth, but also the effective measure with significant Social benefit and economic benefit and heating energy-saving.It can be with
The pollution to environment is reduced, realizes recycling and environmentally protective theory for resource.
Further, the weight ratio of the combined polyether glycol and polymeric MDI system isocyanate are as follows: 1:1-1.05, institute
State the Product liquid oligomer polyol that combined polyether glycol includes polyether polyol, waste polyurethane rigid foam glycolysis
Mixture, water, surfactant, response type amine catalyst, conventional amine catalyst and foaming agent.
Wherein, surfactant is polysiloxanes, and model 3303 reduces foam surface tension, controls cell size
Stable foam effect；Response type amine catalyst dimethyl cyclohexyl amine: participating in polyurethane reaction, controls expansion rate；Conventional amine is urged
Agent triethanolamine controls polymerization rate.Foaming agent is a fluorine dichloroethanes.Further, the combined polyether glycol
Refer to include the polyethers of 80-90wt%, water, surfactant, catalyst and foaming agent mixture and 10-20wt%
Recycle the Product liquid oligomer polyol of waste polyurethane rigid foam glycolysis.
Further, the polyethers in the polyether polyol is using glycerol as initiator, propylene oxide ring-opening polymerisation, hydroxyl value 430-
480mgK0H/g。
A kind of insulating tube using recycling waste hard polyurethane foam production, including instrumentation tubes (1), polyurethane heat-insulation
Layer (2), high density polyethylene (HDPE) bracket (3) and high-density polyethylene outer protection tube (4), instrumentation tubes (1) and high-density polyethylene outer protection tube
(4) it is supported positioning by high density polyethylene (HDPE) bracket (3) between and forms filling space, the filling space is filled with poly-
Urethane insulating layer (2), it is characterised in that: the polyurethane insulation coating (2) utilizes recycling waste hard polyurethane foam using above-mentioned
Plastic production insulating tube material is made.
A kind of production method of insulating tube, comprising the following steps:
Step 1 checks instrumentation tubes (1) appearance, checks whether that there are breakages for instrumentation tubes (1)；
Step 2 installs high density polyethylene (HDPE) bracket (3) outside apparently sound instrumentation tubes (1)；
Step 3, installation high-density polyethylene outer protection tube (4) forms insulating tube one outside high density polyethylene (HDPE) bracket (3)
Part is supported positioning and shape by high density polyethylene (HDPE) bracket (3) between instrumentation tubes (1) and high-density polyethylene outer protection tube (4)
At filling space；
Step 4 hangs gained insulating tube integral piece in step 3 on foaming platform；
Step 5 blocks insulating tube integral piece both ends by propulsion flange；
Step 6 opens up 1 foam hole, high pressure foaming machine casting foaming at the intermediate position of high-density polyethylene outer protection tube (4)
Molding；
Step 7 exits flange closure, and insulating tube completes.
Further, the white material in the step 6 is the poly- ammonia that gives up of the polyether polyol of 80-90 parts by weight, 10-20 parts by weight
The Product liquid oligomer polyol mixture of ester rigid foam glycolysis, the water of 1.0-1.5 parts by weight, 1.5-3.0 weight
Part surfactant, the response type amine catalysts of 0.4-1.5 parts by weight, 0.3-1 parts by weight conventional amine catalyst, 0-1.5
The crosslinking agent of parts by weight: the foaming agent of 30-50 parts by weight: and black material is the polymeric MDI system isocyanic acid of 145-150 parts by weight
Ester.
Further, 6.1, will be stirred in the white material component tank of various white material raw materials additions by above-mentioned formula in step 6
Uniformly；Black material raw material is added in black material component tank simultaneously；
6.2, by expansion density >=60kg/m in insulating tube3It calculates and produces effective black, the white doses of heat preservation；It sets and pours
Infuse the time.White, black two kinds of material match 1:1-1.05；Material temperature control is set at 25-35 DEG C；
6.3, after above-mentioned preparation is ready, first start hydraulic selector, after equipment operation is normal, open high-pressure metering pump
With the low pressure recycle mode of height pressure electromagnetic valve, white, black material just enters respective high-pressure metering pump by a filter respectively, then
It is flowed back into respective component tank by respective high-pressure metering pump, so circulation 3-5 minutes, converts the supreme pressure of height pressure electromagnetic valve
Circulation presses emission switch, white material and black material and injects foam hole quickly through mixing head under high pressure effect, blocks foam hole,
Once-cast foaming.
This using recycling waste hard polyurethane foam production insulating tube material, insulating tube and production method have with
It is lower the utility model has the advantages that
(1) present invention reduces the pollution to environment, realizes recycling for resource, so that steeping using waste hard polyurethane
Foam recycles production insulating tube and is possibly realized, and reduces production cost, also has energy saving, environmental-friendly and is easy to industrial
Change the characteristics of promoting.
(2) present invention process is simple, at low cost, and not only waste utilization is not only environmentally friendly but also can improve prefabricated direct-buried thermal insulation pipe polyurethane
Insulating layer foamy body, insulating tube even density, foam structure is good, compression strength is high, very good solution foam collapse and
The problems such as contraction.
(3) the alcoholysis product liquid oligomer polyalcohol that active hydrogen group sealing end can be obtained using alcoholysis method in the present invention is mixed
The insulating tube that object can be directly used as production is closed, handles to obtain liquid oligomer polyol blends through alcoholysis, can be moulded with others
Interaction force is generated between material matrix, greatly improves the thermal insulation property of insulating tube.
The key reaction that polyurethane alcoholysis occurs is: under alcoholysis agent effect, the urethane bond in polyurethane occurs
Fracture is whole to be replaced by short alcohol chain, this process releases long-chain polyhydric alcohol and the generation with aromatic compound, is obtained
The alcoholysis product liquid oligomer polyol blends of active hydrogen group sealing end can directly be reacted with isocyanates, alternative use
It synthesizes a series of polyurethane products, not only mitigates that environmental pollution reduces resource loss but also recycling products obtained therefrom is at low cost
It is honest and clean, to realize the recycling of raw material, reduce the cost of new product, realize waste hard polyurethane foam it is efficient,
Green circulatory utilizes, and with the development of economy, circular economy is inherently increasingly valued by people.It can be used for congruency
The prefabricated direct-buried thermal insulation pipe of the heating system of energy has very big economic benefit and social benefit.
(4) present invention recycles the high-efficient of waste hard polyurethane foam using alcoholysis technology, and quality of item is good, foam
Intensity height can be applied in heat preservation tubing products.
Specifically, insulating tube insulating layer with alcoholysis product liquid oligomer polyol blends easy to operate, technique stream
Journey is short, the rate of recovery is high, and required isocyanates is few when producing insulating tube insulating layer with polyether polyol mixed regeneration, and foaming properties are excellent
It is good, intensity is high, thermal conductivity is small compared with not having to recycle polyalcohol foam, not only mitigates environmental pollution and reduces resource loss but also recycling
Products obtained therefrom is low in cost, the efficient of insulating tube waste hard polyurethane foam, green circulatory utilization is realized, with economy
Development, circular economy is inherently increasingly valued by people.It can be used for the prefabricated straight of the heating system of equal performance
Burying insulating tube has very big economic benefit and social benefit.
Detailed description of the invention
Fig. 1: the axial section of insulating tube of the present invention；
Fig. 2: the component connection schematic diagram of insulating tube of the present invention；
Fig. 3: the high density polyethylene (HDPE) supporting structure schematic diagram of insulating tube of the present invention；
Fig. 4: the fabrication processing figure of insulating tube of the present invention；
Fig. 5: mesohigh casting machine workflow of the present invention and operational flowchart.
Description of symbols:
1-instrumentation tubes；2-polyurethane insulation coatings；3-high density polyethylene (HDPE) brackets；31-ring structures；32-support leaves
Piece；33-support platforms；4-high-density polyethylene external protective pipes.
Specific embodiment
Below with reference to Fig. 1 to Fig. 4, the present invention will be further described:
As shown in Figure 1, a kind of insulating tube using recycling waste hard polyurethane foam production, including it is instrumentation tubes 1, poly-
Urethane insulating layer 2, high density polyethylene (HDPE) bracket 3 and high-density polyethylene outer protection tube 4, instrumentation tubes 1 and high-density polyethylene outer protection tube 4
Between be supported positioning and form filling space by high density polyethylene (HDPE) bracket 3, filling space is filled with polyurethane heat-insulation
Layer 2.
" high density " in high density polyethylene (HDPE) bracket 3 and high-density polyethylene outer protection tube 4 refers to greater than 0.96g/cm3。
Polyurethane insulation coating 2 is made using above-mentioned using recycling waste hard polyurethane foam production insulating tube material.
As shown in Fig. 2, being supported between instrumentation tubes 1 and high-density polyethylene outer protection tube 4 by high density polyethylene (HDPE) bracket 3
Positioning, high density polyethylene (HDPE) bracket 3 include a ring structure 31, are fixed in instrumentation tubes 1 on the inside of ring structure 31, ring junction
The support blade 32 of multiple divergence expressions is fixed on 31 outer wall of structure, 32 outermost end of support blade is equipped with support platform 33, supports leaf
Piece 32 and support platform 33 form T-shaped structure.T-shaped structure will be outside instrumentation tubes 1 and high-density polyethylene by way of extruding
Both pillars 4 are fixed.
As shown in figure 3, the production method of insulating tube, comprising the following steps:
Step 1 checks 1 appearance of instrumentation tubes, and it is damaged to check whether that instrumentation tubes 1 exist.
Step 2 installs high density polyethylene (HDPE) bracket 3 outside apparently sound instrumentation tubes 1.
Step 3 installs the formation insulating tube integral piece of high-density polyethylene outer protection tube 4, work outside high density polyethylene (HDPE) bracket 3
Make to be supported positioning by high density polyethylene (HDPE) bracket 3 between pipe 1 and high-density polyethylene outer protection tube 4 and form filling space.
Step 4 hangs gained insulating tube integral piece in step 3 on foaming platform.
Step 5 blocks insulating tube integral piece both ends by propulsion flange.
Step 6 opens up 1 foam hole at the intermediate position of high-density polyethylene outer protection tube 4, injects after abscess and blocks one with lid
Secondary casting foaming.
Step 7 exits flange closure, and insulating tube completes.
As shown in figure 5, mesohigh casting machine workflow of the present invention and operating process are as follows:
Various white material raw materials are added in white material component tank by above-mentioned formula, are uniformly mixed；Simultaneously by black material raw material
It is added in black material component tank.
By expansion density >=60kg/m in insulating tube3It calculates and produces effective black, the white doses of heat preservation；When setting casting
Between.White, black two kinds of material match 1:1-1.05；Material temperature control is set at 25-35 DEG C.
After above-mentioned preparation is ready, first start hydraulic selector, after equipment operation is normal, it is (high to open high-pressure metering pump
Pressure metering pump can not only play the role of trandfer fluid and namely convey white material and black material, can also injection volume to material into
Row metering) and height pressure electromagnetic valve low pressure recycle mode, just by a filter, (filter plays filtering to white, black material respectively
The effect of impurity in material) enter respective high-pressure metering pump, then respective component tank is flowed back by respective high-pressure metering pump
In, so circulation 3-5 minutes, the supreme pressure circulation of conversion height pressure electromagnetic valve are pressed emission switch, white material and black material and are made in high pressure
Foam hole is injected quickly through mixing head (material is sufficiently mixed) under, blocks foam hole, once-cast foaming.
Above-mentioned high pressure running gate system includes white material component tank, white material filter, white material high-pressure metering pump, mixing head, black material
Component tank, black material filter, black material high-pressure metering pump, hydraulic selector, height pressure electromagnetic valve；White material component tank passes through pipeline successively
It connects white material filter and white material high-pressure metering pump and is ultimately connected on mixing head, black material component tank successively connects also by pipeline
It connects black material filter and black material high-pressure metering pump and is ultimately connected on mixing head；Hydraulic selector had not only controlled white material component but also had controlled
The operation of black material component in the duct.The high pressure of the white material high-pressure metering pump of high-low pressure solenoid valve control and black material high-pressure metering pump and
The switching of operating on low voltage mode.
Embodiment:
Preferred formula is as follows: the waste polyurethane rigid foam ferment of the polyether polyol of 90 parts by weight, 10 parts by weight
The Product liquid oligomer polyol mixture of solution, the water of 1.5 parts by weight, the surfactants of 3 parts by weight, 1.5 parts by weight
Response type amine catalyst, the conventional amine catalyst of 1 parts by weight, the crosslinking agent of 1.5 parts by weight, 30 parts by weight foaming agent and
The polymeric MDI system isocyanate of 145 parts by weight.
The weight ratio of combined polyether glycol and polymeric MDI system isocyanate are as follows: 1:1, preferably 1:1.05.Wherein, group
Close polyether polyol be by 80-90wt%, preferably the polyether polyol of 90wt%, 10-20wt% recycling waste polyurethane hard
The Product liquid oligomer polyol mixture of foamed plastics glycolysis, the recycling waste polyurethane rigid foam of preferably 10wt%
The Product liquid oligomer polyol mixture of glycolysis；Wherein, polyethers is using glycerol as initiator, propylene oxide ring-opening polymerisation, hydroxyl
The polyether polyol (model 4110) of value 430-480mgK0H/g, preferably 480mgK0H/g, number-average molecular weight about 400.
Recycling waste hard polyurethane alcoholysis product polyol blends, in catalyst, there are situations using dihydric alcohol as alcoholysis agent
Under, the optimum temperature of alcoholysis is 220 DEG C.The yield of glycolysis product is about 95%.Wherein, waste hard polyurethane alcoholysis product is recycled
Liquid oligomer polyol blends are self-control alcoholysis product.
Above in conjunction with attached drawing, an exemplary description of the invention, it is clear that realization of the invention is not by aforesaid way
Limitation, as long as use the inventive concept and technical scheme of the present invention carry out various improvement, or it is not improved will be of the invention
Conception and technical scheme directly apply to other occasions, be within the scope of the invention.
Claims (1)
1. a kind of production method of insulating tube, comprising the following steps:
Step 1 checks instrumentation tubes (1) appearance, checks whether that there are breakages for instrumentation tubes (1)；
Step 2 installs high density polyethylene (HDPE) bracket (3) outside apparently sound instrumentation tubes (1)；
Step 3, installation high-density polyethylene outer protection tube (4) forms insulating tube integral piece, work outside high density polyethylene (HDPE) bracket (3)
It manages and is supported positioning by high density polyethylene (HDPE) bracket (3) between (1) and high-density polyethylene outer protection tube (4) and forms filler
Space；
Step 4 hangs gained insulating tube integral piece in step 3 on foaming platform；
Step 5 blocks insulating tube integral piece both ends by propulsion flange；
Step 6 opens up 1 foam hole at the intermediate position of high-density polyethylene outer protection tube (4), first starts hydraulic selector, operating is just
Restart white batch can after often, then restarts black batch can, turn cycle of higher pressure after 3-5 minutes low pressure recycles, press transmitting
Switch, foaming machine, which injects black and white material component feed liquid after foam hole, blocks once-cast foaming with lid；In the step 6
White material is the Product liquid of the waste polyurethane rigid foam glycolysis of the polyether polyol, 10-20 parts by weight of 80-90 parts by weight
Oligomer polyol mixture, the water of 1.0-1.5 parts by weight, the surfactant of 1.5-3.0 parts by weight, 0.4-1.5 parts by weight
Response type amine catalyst, the conventional amine catalyst of 0.3-1 parts by weight, the crosslinking agent of 0-1.5 parts by weight, 30-50 parts by weight
Foaming agent: the black material is the polymerization MD I system isocyanate of 145-150 parts by weight；The waste polyurethane rigid foam
The Product liquid oligomer polyol mixture of glycolysis be by waste hard polyurethane foam after broken crusher machine by following
Ratio is put into reaction kettle, adds alcoholysis agent, 150-220 degrees Celsius obtained by reaction 8-10 hours under the action of alcoholysis agent；
Wherein, waste polyurethane rigid foam and the weight ratio of alcoholysis agent are 2:1；The combined polyether glycol with polymerize MD I
The weight ratio of system isocyanate are as follows: 1:1-1.05, the combined polyether glycol include polyether polyol, waste polyurethane hard
Product liquid oligomer polyol mixture, water, surfactant, response type amine catalyst, the conventional amine of foamed plastics glycolysis
Catalyst, crosslinking agent and foaming agent；The combined polyether glycol refer to include 80-90wt% polyethers, water, surface it is living
Property agent, the recycling waste polyurethane rigid foam glycolysis of the mixture of catalyst and foaming agent and 10-20wt% product
Liquid oligomer polyalcohol；Polyethers in the polyether polyol is using glycerol as initiator, propylene oxide ring-opening polymerisation, hydroxyl value
430-480mgK0H/g；
6.1, various white material raw materials being added in white material component tank by above-mentioned formula in step 6, is uniformly mixed；Simultaneously will
Black material raw material is added in black material component tank；
6.2, by expansion density >=60kg/m in insulating tube3It calculates and produces effective black, the white doses of heat preservation；When setting casting
Between.White, black two kinds of material match 1:1-1.05；Material temperature control is set at 25-35 DEG C；
6.3, after above-mentioned preparation is ready, first start hydraulic selector, after equipment operation is normal, open high-pressure metering pump and height
The low pressure recycle mode of low-voltage solenoid valve, white, black material just enter respective high-pressure metering pump by a filter respectively, then by each
From high-pressure metering pump flow back into respective component tank, so circulation 3-5 minute, conversion height pressure electromagnetic valve it is supreme press follow
Ring, press emission switch, white material and black material high pressure effect under quickly through mixing head inject foam hole, block foam hole, one
Secondary casting foaming；
Step 7 exits flange closure, and insulating tube completes.
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| CN109912961A (en) * | 2019-04-04 | 2019-06-21 | 张宏春 | A kind of production method of plastic pipe heat preservation layer material |
| CN112011081A (en) * | 2020-09-16 | 2020-12-01 | 天津军星管业集团有限公司 | Method and equipment for pouring low-pressure gaseous carbon dioxide foaming rigid polyurethane foam |
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