WO2020002098A1 - Procédé de séchage d'un matériau de noyau dans un matériau composite de polyuréthane - Google Patents

Procédé de séchage d'un matériau de noyau dans un matériau composite de polyuréthane Download PDF

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Publication number
WO2020002098A1
WO2020002098A1 PCT/EP2019/066231 EP2019066231W WO2020002098A1 WO 2020002098 A1 WO2020002098 A1 WO 2020002098A1 EP 2019066231 W EP2019066231 W EP 2019066231W WO 2020002098 A1 WO2020002098 A1 WO 2020002098A1
Authority
WO
WIPO (PCT)
Prior art keywords
core material
film
fiber
heating
polyurethane
Prior art date
Application number
PCT/EP2019/066231
Other languages
English (en)
Inventor
Yongming GU
Di Wu
Yichen ZHENG
Xiaojun Han
Hao Cheng
Hui Zhang
Original Assignee
Covestro Deutschland Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201810666862.6A external-priority patent/CN110625843A/zh
Application filed by Covestro Deutschland Ag filed Critical Covestro Deutschland Ag
Publication of WO2020002098A1 publication Critical patent/WO2020002098A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/08—Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0092—Drying moulded articles or half products, e.g. preforms, during or after moulding or cooling
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous

Definitions

  • the invention relates to a method for drying a core material used in a polyurethane composite material.
  • Polyurethane composite materials are widely used in various fields, such as: pultrusion, window frames, household appliances and wind turbine blades.
  • Wind energy is considered to be one of the cleanest and most environmentally friendly energy sources currently available. Therefore, wind turbines have been continuously demanded by the market.
  • the turbine blades made of polyurethane composite materials have the advantages of lower cost and better mechanical properties.
  • polyurethane is sensitive to water, and the core material used to produce turbine blades, such as balsa wood, PVC foam, etc., usually contain a certain amount of moisture, and therefore need to be dried prior to infusing the polyurethane liquid raw materials.
  • US 6264877 B l discloses a method of manufacturing a composite part, in particular a wind turbine blade of great length, which is made of a polymer-containing fabric or fiber, such as glass fiber or polypropylene fiber.
  • a fabric is placed in two molds having a part shape, and a hollow envelope-shaped body is placed in the middle of the fabric within one of the mold sections.
  • the molds are closed, and heated to 20°C under high pressure to melt the polypropylene of the fabric, so that the glass fiber is embedded. Then, it is cooled and demolded.
  • CN 102076485 B discloses a rotor blade and a method for manufacturing a rotor blade for a wind turbine as well as its manufacturing mold.
  • the rotor blade extends longitudinally from the blade root area for connection to the rotor hub of the wind turbine up to the blade tip in a ready-to-use state and is divided into at least two sections for its manufacture, wherein there is at least one division between the blade root area and the blade tip in the direction approximately transverse to its longitudinal extension.
  • the purpose of this invention is to simplify the manufacture of a rotor blade, in particular its mass production, and to shorten the production period, but still to supply a rotor blade like a conventional monolithic rotor blade.
  • a method for drying a core material used for a polyurethane composite material which comprises the following steps:
  • the support device may be a device for heating the core material, such as a mold that can be heated; it may also be a non-heating device, such as a platform or a mold for resting the core material.
  • the device is preferably a mold, for example: a mold for a turbine blade and/or its components, a mold for an aircraft and/or its components, a mold for a hull and/or its components, a mold for a vehicle body and/or its components, and the like.
  • the flow media refers to a material having a porous structure, which may be a wattled, woven, knitted, extruded or crocheted material, foam, or a material having a mesh or mesh structure itself. Specifically, it includes, but is not limited to, woven flow mesh, pressed flow mesh, continuous fiber mats; and mixed flow mesh such as those made by mixing two or more fiber fabrics of woven flow mesh, pressed flow mesh and continuous felts and cut felts.
  • the material used as a flow media may include, but is not limited to, polystyrene (PS), polyurethane (PUR), polyphenylene oxide (PPO), polypropylene, ABS, and glass fiber fabrics and the like.
  • the surface density of the material having a porous structure is preferably from 100 g/m 2 to 500 g/m 2 .
  • the flow media is mainly used to assist in evacuating during the drying process and guiding the flow during the introduction of a polyurethane liquid material.
  • the core material is preferably heated by means of one, two or more heating elements selected of the group containing electric blanket heating, electric film heating, microwave heating, infrared heating, and hot air heating.
  • the core material which is placed on the support device is covered preferably with at least two films, said at least two films are sealed at the periphery and provided with at least one inlet channel used to introduce hot air flow to heat the core material and one outlet channel used to expel the air flow from the space sealed by the two films.
  • the support device is also heated or the device further includes a heating element.
  • a fiber reinforced material is preferably laid on the device and then the core material is laid on the fiber reinforced material.
  • At least one fiber reinforced material is laid on the device, and then at least another fiber reinforced material is laid on the core material after placing the core material and before placing the film.
  • the fiber reinforced material is preferably selected from the group consisting of layers of randomly oriented glass fibers, glass fiber fabrics and glass fiber webs, cut or ground glass fibers or mineral fibers, and fiber mats, fiber non-wovens and fiber knitted fabrics based on polymer fiber, mineral fiber, carbon fiber, glass fiber or aramid fiber, and mixtures thereof.
  • the core material is preferably selected from the group consisting of balsa wood, PVC foam, SAN foam, polyurethane foam, PS foam, PMI foam, and PET foam.
  • a peel ply is disposed between the core material or the fiber reinforced material and the flow media.
  • the peel ply is used to assist in demolding and surface treatment of polyurethane resin. If there is no fiber reinforced material, it is placed between the core material and the flow media; if there is a fiber reinforced material, it is usually placed between the fiber reinforcing material and the flow media.
  • the device is preferably heated to 40-80°C for 1 -6 hours.
  • the surface temperature of the core material during heating preferably reaches 30-75°C, more preferably 35-70°C, particularly preferably 35-65°C.
  • the thickness of the film is preferably 40-100 pm.
  • a method for preparing a polyurethane composite material containing a core material comprising the following steps:
  • the core material is selected from the group consisting of balsa wood, PVC foam, SAN foam, polyurethane foam, PS foam, PMI foam, and PET foam, with balsa wood being particularly preferred.
  • Figure 1 1 indicates a mold; 2 indicates a sealing tape; 3 indicates a polyurethane infusion runner; 4 indicates the first film; 5 indicates the second film; 6 indicates hot air; 7 indicates a peel ply and a flow media; 8 indicates a core material; 9 indicates a fiber reinforced material; and 10 indicates a vacuum runner.
  • Figure 2 1 shows a photograph of the appearance of a polyurethane composite material obtained by drying a core material according to the method of the present invention
  • 2 shows a photograph of the appearance of a polyurethane composite material obtained by drying a core material according to the method commonly used in the art.
  • a method for drying a core material used for a polyurethane composite material which comprises the following steps:
  • the support device may be a device for heating the core material, or a non-heating device, such as a platform or a mold for resting the core material.
  • the device is preferably a mold.
  • the mold includes, but not limited to, a mold for a turbine blade and/or its components, a mold for an aircraft and/or its components, a mold for a hull and/or its components, a mold for a vehicle body and/or its components, and the like.
  • the device is a mold that can be used to produce a turbine blade and/or its components by means of a polyurethane vacuum infusion method.
  • a flow media is placed between the film and the core material prior to sealing the periphery of the film and the device.
  • the core material is heated by means of one, two or more heating element devices selected from electric blanket heating, electric film heating, microwave heating, infrared heating, and hot air heating.
  • Electric blanket or electric film heating means that the heating is carried out by providing a current to an electric blanket or an electric film under the mold or over the film.
  • Other conventional heating methods in the art can also be used in the present invention.
  • the core material which is placed on the support device is covered with at least two films, said at least two films are sealed at the periphery and provided with at least one inlet channel used to introduce hot air flow to heat the core material and one outlet channel used to expel the air flow from the space sealed by the two films. More preferably, the support device is heated simultaneously.
  • a fiber reinforced material is laid on the device and then the core material is laid on the fiber reinforced material.
  • At least one fiber reinforced material is laid on the device, and at least another fiber reinforced material is laid on the core material after placing the core material and before placing the film.
  • the fiber reinforced material is selected from the group consisting of layers of randomly oriented glass fibers, glass fiber fabrics and glass fiber webs, cut or ground glass fibers or mineral fibers, and fiber mats, fiber non-wovens and fiber knitted fabrics based on polymer fiber, mineral fiber, carbon fiber, glass fiber or aramid fiber, and mixtures thereof.
  • the core material is preferably selected from the group consisting of balsa wood, PVC foam, SAN foam, polyurethane foam, PS foam, PMI foam, and PET foam.
  • a peel ply is disposed between the core material or the fiber reinforced material and the flow media.
  • the peel ply is disposed between the fiber reinforced material and the flow media.
  • the device is preferably heated to 40-80°C for 1-6 hours.
  • the surface temperature of the core material during heating reaches 30-75°C, more preferably 35-70°C, particularly preferably 35-65°C.
  • the thickness of the film is preferably 40-100 pm.
  • a method for preparing a polyurethane composite material containing a core material comprising the following steps:
  • the polyurethane liquid material is introduced preferably by means of vacuum infusion.
  • the inventive polyurethane composite material in a turbine blade.
  • the polyurethane composite material is produced by the aforementioned method for preparing a polyurethane composite material containing a core material.
  • Balsa wood (density: 160 g/m 2 ; thickness: 1 inch): purchased from sino-compsite Company; Film: purchased from Leadgo-Tech Co., Ltd., thickness: 50 pm;
  • Sealing tape (article number: WD209): purchased from Shanghai Kangda New Materials Co., Ltd.;
  • Glass fabric (biaxial): purchased from Chongqing International Composite Materials Co., Ltd.;
  • Peel ply (gram weight: 95 g/m 2 ): purchased from Leadgo-Tech Co., Ltd.;
  • Insulation blanket (specification: a width of 1 m, a length of 2 m, a thickness of 30 mm): purchased from a sponge factory;
  • Polyurethane liquid raw material (article numbers: Baydur 78BD085 and Desmodur 44CP20): purchased from Covestro Polymers (China) Co., Ltd..
  • Temperature measurement using an infrared temperature gun to monitor the surface temperature.
  • Example 1 A glass fabric was laid on a mold, and then balsa wood, another glass fabric, a peel ply, a flow media, and a film was sequentially placed thereon. The periphery of the film and the device were sealed and the film was tightened using a vacuum pump. Then, the second film was laid thereon and fixed by using sealing tape, with an inlet channel and an outlet channel reserved. The mold was heated while hot air was filled in between the first film and the second film, and the upper surface of the first film was provided with a temperature close to the mold temperature (the mold temperature was set to 50°C). After 2 hours, the heating and the hot air blowing were stopped, and the surface temperature of the balsa wood was measured as 40°C with a temperature gun. After cooling to room temperature, a polyurethane liquid raw material was infused and cured to obtain a polyurethane composite material (the surface condition is shown in FIG. 2-1). Comparative Example 1 :
  • a glass fabric was laid on a mold, and then balsa wood, another glass fabric, a peel ply, and a flow media were sequentially placed thereon, and they are finally covered with an insulation blanket.
  • the mold was heated (the mold temperature was set to 50°C). After 2 hours, the heating was stopped, and the surface temperature of the balsa wood was measured as 33 °C with a temperature gun. After cooling to room temperature, a polyurethane liquid raw material was infused and cured to obtain a polyurethane composite material (the surface condition is shown in FIG. 2-2).
  • the balsa wood treated with the drying method of the present invention (Example 1 , Fig. 2- 1) has only a slight and partial bulging of the polyurethane resin after polymerization, while the entire surface area of the polyurethane resin produced in Comparative Example 1 was completely bulging throughout the balsa wood (Fig. 2-2).
  • the drying method of the present invention can increase the surface temperature of the balsa wood more effectively than that in the prior art, so that the balsa wood is better heated and the moisture is more effectively removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de séchage d'un matériau de noyau (8) utilisé pour un matériau composite de polyuréthane, qui comprend les étapes suivantes : placer un matériau de noyau (8) sur un dispositif de support, recouvrir le matériau de noyau avec au moins un film (4), sceller la périphérie du film (4) et du dispositif en réservant au moins un canal ; chauffer le matériau de noyau (8) et faire le vide dans l'espace scellé délimité par le film (4) et le dispositif par l'intermédiaire du canal, jusqu'à ce que le matériau de noyau (8) soit sec. Le procédé selon la présente invention permet de sécher rapidement et efficacement un matériau de noyau utilisé pour un matériau composite de polyuréthane, ce qui permet d'améliorer l'efficacité de production du matériau composite de polyuréthane.
PCT/EP2019/066231 2018-06-25 2019-06-19 Procédé de séchage d'un matériau de noyau dans un matériau composite de polyuréthane WO2020002098A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201810666862.6A CN110625843A (zh) 2018-06-25 2018-06-25 一种聚氨酯复合材料中夹芯材料的干燥方法
CN201810666862.6 2018-06-25
EP18211979.2 2018-12-12
EP18211979 2018-12-12

Publications (1)

Publication Number Publication Date
WO2020002098A1 true WO2020002098A1 (fr) 2020-01-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11691382B2 (en) 2019-12-18 2023-07-04 Checkerspot, Inc. Uses of microbial derived materials in polymer applications

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387183B (de) * 1983-10-05 1988-12-12 Distropat Ag Verfahren zum anschaeumen eines teiles aus polyurethan-schaumstoff an wenigstens einen teil aus holz oder holzaehnlichen werkstoffen
US20140087613A1 (en) * 2011-03-25 2014-03-27 Evonik Degussa Gmbh Storage-stable polyurethane prepregs and mouldings produced therefrom composed of a polyurethane composition with liquid resin components
EP2915656A1 (fr) * 2014-03-06 2015-09-09 Siemens Aktiengesellschaft Procédé de fabrication d'un composant pour éolienne
WO2017009348A1 (fr) * 2015-07-13 2017-01-19 Covestro Deutschland Ag Procédé et appareil pour fabriquer un article moulé
US20170306116A1 (en) * 2014-08-29 2017-10-26 Covestro Deutschland Ag Lightfast polyurethane prepregs and fiber composite elements produced therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387183B (de) * 1983-10-05 1988-12-12 Distropat Ag Verfahren zum anschaeumen eines teiles aus polyurethan-schaumstoff an wenigstens einen teil aus holz oder holzaehnlichen werkstoffen
US20140087613A1 (en) * 2011-03-25 2014-03-27 Evonik Degussa Gmbh Storage-stable polyurethane prepregs and mouldings produced therefrom composed of a polyurethane composition with liquid resin components
EP2915656A1 (fr) * 2014-03-06 2015-09-09 Siemens Aktiengesellschaft Procédé de fabrication d'un composant pour éolienne
US20170306116A1 (en) * 2014-08-29 2017-10-26 Covestro Deutschland Ag Lightfast polyurethane prepregs and fiber composite elements produced therefrom
WO2017009348A1 (fr) * 2015-07-13 2017-01-19 Covestro Deutschland Ag Procédé et appareil pour fabriquer un article moulé

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11691382B2 (en) 2019-12-18 2023-07-04 Checkerspot, Inc. Uses of microbial derived materials in polymer applications

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