CN108317305A - A kind of polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method - Google Patents

A kind of polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method Download PDF

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Publication number
CN108317305A
CN108317305A CN201810097591.7A CN201810097591A CN108317305A CN 108317305 A CN108317305 A CN 108317305A CN 201810097591 A CN201810097591 A CN 201810097591A CN 108317305 A CN108317305 A CN 108317305A
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layer
polystyrene
parts
foaming
polyethylene
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Inventor
刘利强
贾生廷
韩波
王洪波
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Zibo Jielin Plastic Pipe Co Ltd
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Zibo Jielin Plastic Pipe Co Ltd
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Priority to CN201810097591.7A priority Critical patent/CN108317305A/en
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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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/22—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/24—Making multilayered articles
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • 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
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • 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
    • C08J9/12—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 physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
    • 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
    • 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
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • 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
    • C08J2203/06—CO2, N2 or noble gases
    • 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
    • C08J2203/08—Supercritical fluid
    • 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
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene
    • 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
    • C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2351/04—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to rubbers
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

A kind of polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method, belong in building and heating station pipe technology field.It is characterized in that：The CO of internal layer including coextrusion mold2The polyethylene of polystyrene heat-preservation layer and outer layer is blended in foaming and ethylene-vinyl acetate copolymer protective layer, preparation process are：Polystyrene or high impact polystyrene are uniformly mixed using homogenizer according to the ratio with low density polyethylene blends and nucleating agent, antioxidant；Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, ethyl alcohol and water composition foaming agent, using co-extrusion machine one layer of ethylene-vinyl acetate copolymer protective layer of co-extrusion to obtain the final product.Production efficiency is high, and properties of product are stablized.

Description

A kind of polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method
Technical field
A kind of polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method, belong in building and cell Heat supply pipeline technical field.
Background technology
The heat preservation of heat supply pipeline is mainly kept the temperature using polyurethane material at present, used in current polyurethane foam Foaming agent is mainly fluorochlorohydrocarbon class, has destruction to ozone layer, and countries in the world are used in limitation at present.Polyurethane material Can also there be harmful isocyanates residue in foaming process, and expanded material can not recycle, and cause Environmental pollution.Polyurethane material cost is with higher simultaneously, and bubbling efficiency is relatively low, causes pipe insulation of high cost.
Foamed polystyrene needs the hydrocarbon alkane foaming agent using butane or similar low molecular weight at present, to foaming machine and life Production, transport, storage environment have higher requirement, and current foamed polystyrene is mainly used for plank production, not in pipe insulation Field carries out extensive use.
Invention content
The technical problem to be solved by the present invention is to：Overcome the deficiencies of the prior art and provide a kind of environmental-friendly, preparation convenience Polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method.
Technical solution is used by solving its technical problem：The continuous multi-layer co-extruded foaming heat-insulating composite pipe of the polystyrene Material, it is characterised in that：The CO of internal layer including coextrusion mold2The polyethylene and second of polystyrene heat-preservation layer and outer layer is blended in foaming Alkene-acetate ethylene copolymer protective layer, the CO2The parts by weight of raw materials group that polystyrene heat-preservation layer is blended in foaming becomes：It is poly- 80 ~ 100 parts of styrene or high impact polystyrene, 1 ~ 20 part of low density polyethylene (LDPE), 1 ~ 10 part of nucleating agent, 1 ~ 5 part of antioxidant, CO23 ~ 9 parts, 1 ~ 5 part of ethyl alcohol, 1 ~ 5 part of water.
The present invention be directed to presently, there are main problem and pipe insulation requirement, the present invention is with CO2As main Foaming agent avoids the destruction of fluorochlorohydrocarbon class, alkanes foaming agent to environment；PS（Polystyrene）Or high impact polystyrene （HIPS）It is thermal insulation material, extrusion grade polyethylene and ethylene-vinyl acetate copolymer with low density polyethylene blends（EVA）Altogether Mixed object is outer protection tube material.Select high impact polystyrene（HIPS）Or polystyrene and low density polyethylene blends are foaming Material is, it can be achieved that insulating layer is conducive to the matching with follow-up work pipe with certain elasticity and flexibility；Using the poly- second of extrusion grade Alkene and ethylene-vinyl acetate copolymer（EVA）Blend is outer protection tube material, is significantly improved between outer jacket and insulating layer Caking property.
Preferably, the CO2The parts by weight of raw materials group that polystyrene heat-preservation layer is blended in foaming becomes：Polystyrene or height 85 ~ 95 parts of impact-resistant polystyrene, 8 ~ 12 parts of low density polyethylene (LDPE), 4 ~ 6 parts of nucleating agent, 2 ~ 3 parts of antioxidant, CO25.5 ~ 7.5 parts, 2 ~ 3 parts of ethyl alcohol, 2 ~ 3 parts of water.Preferred CO2The elastic and soft of expanded material obtained by the composition of polystyrene heat-preservation layer is blended in foaming Property is more preferable with the cementability of outer protective layer with good.
Preferably, the parts by weight of raw materials group of the polyethylene and ethylene-vinyl acetate copolymer protective layer becomes：Poly- second 50 ~ 90 parts of olefine resin, 10 ~ 50 parts of ethylene-vinyl acetate copolymer.Preferred polyethylene and ethylene-vinyl acetate copolymer are anti- The parts by weight of raw materials of sheath forms and CO2The cementability that polystyrene is blended in foaming is more preferable, the integral strength higher of tubing, service life It is longer.
Preferably, the thickness of the polyethylene and ethylene-vinyl acetate copolymer protective layer is 0.5mm ~ 1.0mm. Good protective action can either be played under the thickness, and can save dosage as far as possible.
Preferably, the polyethylene has layer of polyethylene anti-with co-extrusion is gone back outside ethylene-vinyl acetate copolymer protective layer Sheath.The protective layer for adding one layer and internal layer protective layer different materials mutually coordinates the toughness of three with intensity, tubing it is durable Property is more preferable, and adaptive capacity to environment is stronger.
Preferably, the thickness of the protective polyethylene layer is 1.0 mm ~ 2.0mm.It can either be played under the thickness good Good protective action, and dosage can be saved as far as possible.
A kind of manufacturing method of the continuous multi-layer co-extruded foaming heat-insulating composite pipe material of above-mentioned polystyrene, which is characterized in that system It is for step：
1）The blend that polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE), blend and nucleation Agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, CO through tube forming mouth mold, core model2Gas forms abscess around nucleating agent, is formed CO2Polystyrene heat-preservation layer is blended in foaming；
3）Using co-extrusion machine in CO2Polystyrene heat-preservation layer outer surface co-extrusion layer of polyethylene and ethyl vinyl acetate second is blended in foaming Alkene copolymer obtains ethylene-vinyl acetate copolymer protective layer, then through cooling, draw to obtain the final product.
The present invention is by polystyrene（PS）Or high impact polystyrene（HIPS）Or polystyrene is total to low density polyethylene (LDPE) The mixed components such as object and nucleating agent, antioxidant are uniformly mixed with special ratios using homogenizer, and the raw material mixed is added Double screw extruder carries out plastifying fusion, when the temperature of carbon dioxide is more than 31 DEG C, pressure is more than 7.38MPa, i.e., into the excess of imports Critical carbon dioxide state.The CO for the supercriticality to be formed is injected with special ratios2, ethyl alcohol, water foaming agent, make CO2Gas with Supercriticality is evenly spread in resin, is squeezed out through tube forming mouth mold, core model, rapid pressure drop after melt outlet mould, Make CO2Gas forms abscess around nucleating agent, forms insulating foam layer.After tentatively shaping, kept the temperature using co-extrusion machine The polyethylene and ethylene-vinyl acetate copolymer of layer outer surface co-extrusion（EVA）The protective layer of blend.Using CO2Shooting flow On the one hand body foaming technique, the technology avoid the destruction of fluorochlorohydrocarbon class, alkanes foaming agent to environment, on the other hand, super to face Boundary CO2The CO that expanded material uses2It is extracted from industrial waste gas, equal to passing through CO2Recycle realize carbon compensation, For reducing greenhouse gas emission, realize that low-carbon circular economy is of great significance.It is produced using continuous expressing technique, it is raw Produce efficient, properties of product stabilization.
Inventor also provides a kind of preparation method of the tubing with protective polyethylene layer, the above-mentioned continuous multilayer of polystyrene The manufacturing method of co-extrusion foaming composite insulating pipe material, which is characterized in that preparation process is：
1）The blend that polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE), blend and nucleation Agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, CO through tube forming mouth mold, core model2Gas forms abscess around nucleating agent, is formed CO2Polystyrene heat-preservation layer is blended in foaming；
3）Using co-extrusion machine in CO2Polystyrene heat-preservation layer outer surface co-extrusion layer of polyethylene and ethyl vinyl acetate second is blended in foaming Alkene copolymer obtains ethylene-vinyl acetate copolymer protective layer；
4）The tubing after ethylene-vinyl acetate copolymer protective layer is made and recycles the second poly- second of co-extrusion machine co-extrusion after the cooling period Alkene obtains protective polyethylene layer, then through cooling, draw to obtain the final product.The online co-extrusion of two layers of outer jacket, disposal molding production efficiency are high.
Compared with prior art, possessed advantageous effect of the invention is：
1, using CO2On the one hand supercritical fluid foaming technique, the technology avoid fluorochlorohydrocarbon class, alkanes foaming agent to environment Destruction, on the other hand, supercritical CO2The CO that expanded material uses2It is extracted from industrial waste gas, equal to passing through CO2Follow Ring, for reducing greenhouse gas emission, realizes that low-carbon circular economy is of great significance using carbon compensation is realized.
2, it is produced using continuous expressing technique, production efficiency is high, and properties of product are stablized.
3, high impact polystyrene is selected（HIPS）Or polystyrene and low density polyethylene blends are expanded material, are Inventor is improved for the curved surface needed for tubing to be formulated, it can be achieved that insulating layer is conducive to certain elasticity and flexibility With the matching of follow-up work pipe, the protective layer of insulating layer and outer layer is made to be firmly combined with no apparent delamination.
4, using extrusion grade polyethylene and ethylene-vinyl acetate copolymer（EVA）Blend is outer protection tube material, is significantly carried High caking property between outer jacket and insulating layer.
5, the online co-extrusion of two layers of outer jacket, disposal molding production efficiency are high.
Specific implementation mode
With reference to specific embodiment, the present invention will be further described, and wherein embodiment 1 is best implements.
Embodiment 1
1）It stocks up by weight：90 parts of polystyrene or high impact polystyrene, 5 parts of nucleating agent, resist 10 parts of low density polyethylene (LDPE) 2.5 parts of oxygen agent, CO26.2 parts, ethyl alcohol：2.5 parts, 2.5 parts of water；By polystyrene or high impact polystyrene and low density polyethylene Alkene blend and nucleating agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, rapid pressure drop after melt outlet mould so that CO through tube forming mouth mold, core model2 Gas forms abscess around nucleating agent, forms CO2Polystyrene heat-preservation layer is blended in foaming；
3）It stocks up by weight：70 parts of polyvinyl resin, 30 parts of ethylene-vinyl acetate copolymer, using co-extrusion machine in CO2Foaming Polystyrene guarantor's insulating layer outer surface co-extrusion layer of polyethylene is blended and obtains ethyl vinyl acetate second with ethylene-vinyl acetate copolymer Alkene copolymer protective layer；The thickness of polyethylene and ethylene-vinyl acetate copolymer protective layer is 0.5mm；
4）Second co-extrusion machine is recycled to be gathered in polyethylene and co-extrusion polyethylene outside ethylene-vinyl acetate copolymer protective layer Ethylene protective layer, the thickness of protective polyethylene layer are 1.0 mm, then through cooling, draw to obtain the final product.
Embodiment 2
1）It stocks up by weight：85 parts of polystyrene or high impact polystyrene, 4 parts of nucleating agent, resist 12 parts of low density polyethylene (LDPE) 3 parts of oxygen agent, CO25.5 parts, ethyl alcohol：3 parts, 2 parts of water；Polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE) Object and nucleating agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, rapid pressure drop after melt outlet mould so that CO through tube forming mouth mold, core model2 Gas forms abscess around nucleating agent, forms CO2Polystyrene heat-preservation layer is blended in foaming；
3）It stocks up by weight：60 parts of polyvinyl resin, 40 parts of ethylene-vinyl acetate copolymer, using co-extrusion machine in CO2Foaming Polystyrene guarantor's insulating layer outer surface co-extrusion layer of polyethylene is blended and obtains ethyl vinyl acetate second with ethylene-vinyl acetate copolymer Alkene copolymer protective layer；The thickness of polyethylene and ethylene-vinyl acetate copolymer protective layer is 0.6mm；
4）Second co-extrusion machine is recycled to be gathered in polyethylene and co-extrusion polyethylene outside ethylene-vinyl acetate copolymer protective layer Ethylene protective layer, the thickness of protective polyethylene layer are 1..2mm, then through cooling, draw to obtain the final product.
Embodiment 3
1）It stocks up by weight：95 parts of polystyrene or high impact polystyrene, 6 parts of nucleating agent, resist 8 parts of low density polyethylene (LDPE) 2 parts of oxygen agent, CO27.5 parts, ethyl alcohol：2 parts, 3 parts of water；Polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE) Object and nucleating agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, rapid pressure drop after melt outlet mould so that CO through tube forming mouth mold, core model2 Gas forms abscess around nucleating agent, forms CO2Polystyrene heat-preservation layer is blended in foaming；
3）It stocks up by weight：80 parts of polyvinyl resin, 20 parts of ethylene-vinyl acetate copolymer, using co-extrusion machine in CO2Foaming Polystyrene guarantor's insulating layer outer surface co-extrusion layer of polyethylene is blended and obtains ethyl vinyl acetate second with ethylene-vinyl acetate copolymer Alkene copolymer protective layer；The thickness of polyethylene and ethylene-vinyl acetate copolymer protective layer is 0.7mm；
4）Second co-extrusion machine is recycled to be gathered in polyethylene and co-extrusion polyethylene outside ethylene-vinyl acetate copolymer protective layer Ethylene protective layer, the thickness of protective polyethylene layer are 1.5mm, then through cooling, draw to obtain the final product.
Embodiment 4
1）It stocks up by weight：100 parts of polystyrene or high impact polystyrene, 1 part of low density polyethylene (LDPE), 10 parts of nucleating agent, 1 part of antioxidant, CO29 parts, ethyl alcohol：1 part, 5 parts of water；Polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE) Object and nucleating agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, rapid pressure drop after melt outlet mould so that CO through tube forming mouth mold, core model2 Gas forms abscess around nucleating agent, forms CO2Polystyrene heat-preservation layer is blended in foaming；
3）It stocks up by weight：50 parts of polyvinyl resin, 50 parts of ethylene-vinyl acetate copolymer, using co-extrusion machine in CO2Foaming Polystyrene guarantor's insulating layer outer surface co-extrusion layer of polyethylene is blended and obtains ethyl vinyl acetate second with ethylene-vinyl acetate copolymer Alkene copolymer protective layer；The thickness of polyethylene and ethylene-vinyl acetate copolymer protective layer is 0.9mm；
4）Second co-extrusion machine is recycled to be gathered in polyethylene and co-extrusion polyethylene outside ethylene-vinyl acetate copolymer protective layer Ethylene protective layer, the thickness of protective polyethylene layer are 1.7mm, then through cooling, draw to obtain the final product.
Embodiment 5
1）It stocks up by weight：80 parts of polystyrene or high impact polystyrene, 1 part of nucleating agent, resist 20 parts of low density polyethylene (LDPE) 5 parts of oxygen agent, CO23 parts, ethyl alcohol：5 parts, 1 part of water；By polystyrene or high impact polystyrene and low density polyethylene blends And nucleating agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, rapid pressure drop after melt outlet mould so that CO through tube forming mouth mold, core model2 Gas forms abscess around nucleating agent, forms CO2Polystyrene heat-preservation layer is blended in foaming；
3）It stocks up by weight：90 parts of polyvinyl resin, 10 parts of ethylene-vinyl acetate copolymer, using co-extrusion machine in CO2Foaming Polystyrene guarantor's insulating layer outer surface co-extrusion layer of polyethylene is blended and obtains ethyl vinyl acetate second with ethylene-vinyl acetate copolymer Alkene copolymer protective layer；The thickness of polyethylene and ethylene-vinyl acetate copolymer protective layer is 1.0mm；
4）Second co-extrusion machine is recycled to be gathered in polyethylene and co-extrusion polyethylene outside ethylene-vinyl acetate copolymer protective layer Ethylene protective layer, the thickness of protective polyethylene layer are 2.0mm, then through cooling, draw to obtain the final product.
Embodiment 6
1）It stocks up by weight：90 parts of polystyrene or high impact polystyrene, 5 parts of nucleating agent, resist 10 parts of low density polyethylene (LDPE) 2.5 parts of oxygen agent, CO26 parts, ethyl alcohol：2.5 parts, 2.5 parts of water；By polystyrene or high impact polystyrene and low density polyethylene (LDPE) Blend and nucleating agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, second The foaming agent of alcohol and water composition squeezes out, rapid pressure drop after melt outlet mould so that CO through tube forming mouth mold, core model2 Gas forms abscess around nucleating agent, forms CO2Polystyrene heat-preservation layer is blended in foaming；
3）It stocks up by weight：70 parts of polyvinyl resin, 30 parts of ethylene-vinyl acetate copolymer, using co-extrusion machine in CO2Foaming Polystyrene guarantor's insulating layer outer surface co-extrusion layer of polyethylene is blended and obtains ethyl vinyl acetate second with ethylene-vinyl acetate copolymer Alkene copolymer protective layer；The thickness of polyethylene and ethylene-vinyl acetate copolymer protective layer is 1.0mm, then is through cooling, traction .
Comparative example 1
Basic process steps and material proportion are with embodiment 1, the difference is that step 1）In without use low density polyethylene (LDPE).
Comparative example 2
Basic process steps and material proportion are with embodiment 1, the difference is that step 1）The dosage of middle low density polyethylene (LDPE) is 40 parts.
Comparative example 3
Basic process steps and material proportion are with embodiment 1, the difference is that step 1）CO2, ethyl alcohol, water dosage be respectively 20 Part, 1 part, 1 part.
Comparative example 4
Basic process steps and material proportion are with embodiment 1, the difference is that CO2First co-extrusion outside polystyrene heat-preservation layer is blended in foaming Protective polyethylene layer, then co-extrusion ethylene-vinyl acetate copolymer protective layer.
The performance test results of embodiment and comparative example are shown in Table 1.
The performance test results of 1 embodiment and comparative example of table
。
Comparative example 1,2 and embodiment compare as can be seen that the present invention using polystyrene or high impact polystyrene with it is low Polyamide blend is expanded material, it will be apparent that enhances the caking property of foaming layer and ethylene-vinyl acetate copolymer.It is right Ratio 3 can improve polystyrene or high impact polystyrene and low-density it can be seen that currently preferred foaming agent composition The foaming effect of polyethylene blend, blister it is finer and smoother uniformly, be not in that surface layer is foamed excessive problem.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc. Imitate embodiment.But it is every without departing from technical solution of the present invention content, according to the technical essence of the invention to above example institute Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.

Claims (8)

1. a kind of continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene, it is characterised in that：Internal layer including coextrusion mold CO2The polyethylene and ethylene-vinyl acetate copolymer protective layer of polystyrene heat-preservation layer and outer layer, the CO is blended in foaming2 The parts by weight of raw materials group that polystyrene heat-preservation layer is blended in foaming becomes：It is 80 ~ 100 parts of polystyrene or high impact polystyrene, low 1 ~ 20 part of density polyethylene, 1 ~ 10 part of nucleating agent, 1 ~ 5 part of antioxidant, CO23 ~ 9 parts, 1 ~ 5 part of ethyl alcohol, 1 ~ 5 part of water.
2. a kind of continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene according to claim 1, it is characterised in that： The CO2The parts by weight of raw materials group that polystyrene heat-preservation layer is blended in foaming becomes：Polystyrene or high impact polystyrene 85 ~ 95 parts, 8 ~ 12 parts of low density polyethylene (LDPE), 4 ~ 6 parts of nucleating agent, 2 ~ 3 parts of antioxidant, CO25.5 ~ 7.5 parts, 2 ~ 3 parts of ethyl alcohol, water 2 ~ 3 Part.
3. a kind of continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene according to claim 1, it is characterised in that： The parts by weight of raw materials group of the polyethylene and ethylene-vinyl acetate copolymer protective layer becomes：50 ~ 90 parts of polyvinyl resin, 10 ~ 50 parts of ethylene-vinyl acetate copolymer.
4. a kind of continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene according to claim 3, it is characterised in that： The thickness of the polyethylene and ethylene-vinyl acetate copolymer protective layer is 0.5mm ~ 1.0mm.
5. a kind of continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene according to claim 1, it is characterised in that： The polyethylene has layer of polyethylene protective layer with also co-extrusion outside ethylene-vinyl acetate copolymer protective layer.
6. a kind of continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene according to claim 5, it is characterised in that： The thickness of the protective polyethylene layer is 1.0 mm ~ 2.0mm.
7. a kind of manufacturer of the continuous multi-layer co-extruded foaming heat-insulating composite pipe material of claim 1 ~ 4 any one of them polystyrene Method, which is characterized in that preparation process is：
1）The blend that polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE), blend and nucleation Agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, ethyl alcohol, With the foaming agent of water composition, squeezed out through tube forming mouth mold, core model, CO2Gas forms abscess around nucleating agent, forms CO2Hair Polystyrene heat-preservation layer is blended in bubble；
3）Using co-extrusion machine in CO2Polystyrene heat-preservation layer outer surface co-extrusion layer of polyethylene and ethene-vinyl acetate is blended in foaming Copolymer obtains ethylene-vinyl acetate copolymer protective layer, then through cooling, draw to obtain the final product.
8. a kind of manufacturing method of the continuous multi-layer co-extruded foaming heat-insulating composite pipe material of polystyrene described in claim 5 or 6, It is characterized in that, preparation process is：
1）The blend that polystyrene or high impact polystyrene are blended with low density polyethylene (LDPE), blend and nucleation Agent, antioxidant are uniformly mixed using homogenizer according to the ratio；
2）Double screw extruder is added in the raw material mixed and carries out plastifying fusion, is then injected into the CO of supercriticality2, ethyl alcohol, With the foaming agent of water composition, squeezed out through tube forming mouth mold, core model, CO2Gas forms abscess around nucleating agent, forms CO2Hair Polystyrene heat-preservation layer is blended in bubble；
3）Using co-extrusion machine in CO2Polystyrene heat-preservation layer outer surface co-extrusion layer of polyethylene and ethene-vinyl acetate is blended in foaming Copolymer obtains ethylene-vinyl acetate copolymer protective layer；
4）The tubing after ethylene-vinyl acetate copolymer protective layer is made and recycles the second poly- second of co-extrusion machine co-extrusion after the cooling period Alkene obtains protective polyethylene layer, then through cooling, draw to obtain the final product.
CN201810097591.7A 2018-01-31 2018-01-31 A kind of polystyrene continuously multi-layer co-extruded foaming heat-insulating composite pipe material and its manufacturing method Pending CN108317305A (en)

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Application publication date: 20180724