TR201615857A1 - Plasti̇k i̇ç duvar i̇çeren buzdolabi - Google Patents

Plasti̇k i̇ç duvar i̇çeren buzdolabi Download PDF

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Publication number
TR201615857A1
TR201615857A1 TR2016/15857A TR201615857A TR201615857A1 TR 201615857 A1 TR201615857 A1 TR 201615857A1 TR 2016/15857 A TR2016/15857 A TR 2016/15857A TR 201615857 A TR201615857 A TR 201615857A TR 201615857 A1 TR201615857 A1 TR 201615857A1
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Turkey
Prior art keywords
refrigerator
wall
polystyrene
foaming agent
produced
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TR2016/15857A
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English (en)
Inventor
Özkan Hakan
Demi̇rtaş Emre
Nofar Mohammadreza
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Arcelik As
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Priority to TR2016/15857A priority Critical patent/TR201615857A1/tr
Priority to PCT/TR2017/050454 priority patent/WO2018182550A2/en
Publication of TR201615857A1 publication Critical patent/TR201615857A1/tr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • F25D23/066—Liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of 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
    • C08J9/04—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
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1285—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being foamed
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/18—Filling preformed cavities
    • B29C44/188—Sealing off parts of the cavities
    • 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
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • B29C44/3446—Feeding the blowing agent
    • B29C44/3457—Feeding the blowing agent in solid form to the plastic material
    • 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • 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
    • B29K2105/0088—Blends of polymers
    • 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
    • B29K2625/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof for preformed parts, e.g. for inserts
    • B29K2625/04—Polymers of styrene
    • B29K2625/06—PS, i.e. polystyrene
    • 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
    • B29K2655/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2623/00 - B29K2649/00, e.g. having a vinyl group, for preformed parts, e.g. for inserts
    • B29K2655/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/762—Household appliances
    • B29L2031/7622—Refrigerators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/04—4 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/538—Roughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2509/00—Household appliances
    • B32B2509/10—Refrigerators or refrigerating equipment
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Bu buluş, bir gövde (2), en az bir kapı (3), içine yiyecek ve içecek maddelerinin yerleştirildiği en az bir soğutucu/dondurucu bölme (4), ekstrüzyon yöntemiyle plastik malzemeden üretilen ve gövde (2) ile kapıların (3) bölmelere (4) bakan iç yüzeylerini oluşturan bir iç duvar (5), gövde (2) ve kapılarının (3) dış tarafını oluşturan bir dış duvar (6) ve iç duvar (5) ile dış duvar (6) arasında yer alan ve içine poliüretan (PU) enjekte edilen bir yalıtım hacmi (7) içeren bir buzdolabı (1) ile ilgilidir.

Description

TARIFNAME PLASTIK IÇ DUVAR IÇEREN BUZDOLABI Bu bulus, gövde iç duvarlarinin üretiminde plastik malzeme kullanilan bir buzdolabi ile ilgilidir.
Dünyada yillik toplam polimer üretiminin 350-400 milyon ton civarinda oldugu bilinmektedir ve enerji kaynaklarinin hizla tükenmesi sonucu ürünlerin imalatinda düsük maliyetli ve miktari azaltilan hammaddelerin kullanimi önem kazanmistir.
Buzdolaplarinin gövde ve kapi iç duvarlarinin üretiminde, termoplastik polimer malzemeden örnegin polistirenden (HIPS - High Impact Polystyrene) malzemeden ekstrüzyon yöntemi ile üretilen dörtgen seklinde levhalar kullanilmakta ve bu levhalara sicak sekillendirme (thermoforming) islemi ile son sekilleri verilmektedir. Düsük maliyetli ve hafif bir buzdolabi üretimi için kullanilan polimer hammadde miktari azaltilabilir ancak bu kez isil yalitimin bozulmasi gibi kalite problemleri ortaya çikmaktadir.
US sayili Birlesik Devletler patent basvurusunda bir buzdolabi kabininin üretim prosesi açiklanmaktadir.
Bu bulusun amaci, iç duvarinin üretildigi hammadde miktari azaltilarak malzeme tasarrufu saglanan bir buzdolabinin gerçeklestirilmesidir.
Bu bulusun amacina ulasmak için gerçeklestirilen buzdolabinda gövde ve kapi iç duvarlari, ekstrüzyon yöntemiyle plastik levhalardan üretilmektedir. Iç duvar üç katmanli yapida olup poliüretana temas eden ve polistiren bazli plastik malzemeden üretilen bir alt katman, gidalarin yerlestirildigi iç bölmelere bakan, polistiren bazli plastik malzemeden üretilen bir üst katman ve alt katman ile üst katman arasinda yer alan bir ara katmandan olusmaktadir. Ara katman, polistiren bazli bir ana malzemeye sitrik asit ve sodyum bikarbonat içeren köpürtücü ajan ilave edilerek köpürtülen polistirenden üretilmektedir.
Köpürtücü ajan, sitrik asit ve sodyum bikarbonatin bilesimi olan sodyum sitrat dihidrat granüllerinden olusmakta, söz konusu granüller stiren bazli polimer ile kaplanarak enkapsüle edilmektedir.
Bulusun bir uygulamasinda, ara katman, tamami yüksek darbe dayanimli polistirenden olusan ana malzemeye köpürtücü ajan ilave edilerek üretilmektedir.
Bulusun bir baska uygulamasinda ara katman, yüksek darbe dayanimli polistiren, ABS ve genel amaçli polistiren karisimi içeren ana malzemeye köpürtücü ajan Bu bulusun amacina ulasmak için gerçeklestirilen buzdolabi ekli sekillerde gösterilmis olup bu sekillerden; Sekil 1 - Bir buzdolabinin sematik görünüsüdür.
Sekil 2 - Bulus konusu buzdolabinda yer alan üç katmanli iç duvar yapisinin sematik görünüsüdür.
Sekillerdeki parçalar tek tek numaralandirilmis olup bu numaralarin karsiligi asagida verilmistir.
Buzdolabi Iç duvar Dis duvar Yalitim hacmi Alt katman 9. Üst katman . Ara katman Buzdolabi (1), bir gövde (2), en az bir kapi (3), içine yiyecek ve içecek maddelerinin yerlestirildigi en az bir sogutucu/dondurucu bölme (4), ekstrüzyon yöntemiyle plastik malzemeden üretilen ve gövde (2) ile kapilarin (3) bölmelere (4) bakan iç yüzeylerini olusturan bir iç duvar (inner lining) (5), gövde (2) ve kapilarinin (3) dis tarafini olusturan bir dis duvar (6) ve iç duvar (5) ile dis duvar (6) arasinda yer alan ve içine poliüretan (PU) enjekte edilen bir yalitim hacmi (7) içermektedir.
Bulus konusu buzdolabinda (1) iç duvar (5) üç katmanli bir yapida olup, yalitim hacmi (7) tarafinda yer alan, yalitim hacmine (7) enjekte edilen poliüretana (PU) temas eden ve polistiren (PS) bazli plastik malzemeden üretilen bir alt katman (8), bölmelere (4) hakan iç yüzeyini olusturan, polistiren (PS) bazli plastik malzemeden üretilen bir üst katman (9) ve alt katman (8) ile üst katman (9) arasinda yer alan, polistiren (PS) bazli ana malzemeye (base material) kimyasal köpürtücü ajan (foaming agent) ilave edilerek köpürtülen polistirenden (XPS) üretilen bir ara katman (10) içermektedir.
Bulusun bir uygulamasinda ara katmanin (10) polistiren (PS) bazli ana malzemesine eklenen köpürtücü ajan, sitrik asit (C6H807) ve sodyum bikarbonat (3NaHCO3) içermektedir.
Bulusun tercih edilen uygulamasinda ara katmanin (10) üretiminde ilave edilen köpürtücü ajani olusturan sitrik asit (C6H807) ve sodyum bikarbonatin (3NaHCO3) bilesimi olan sodyum sitrat dihidrat (C6H5Na307) granülleri, stiren bazli polimer ile kaplanarak enkapsüle edilmektedir.
Bu uygulamada köpürtücü ajani olusturan sodyum sitrat dihidrat (C6H5Na307) bikarbonat (3NaHCO3) içermektedir. Enkapsülasyon prosesinde püskürtmeli kurutma (Spray drying) cihazi kullanimi tercih edilmektedir.
Bulusun bir baska uygulamasinda, ara katman (10), %100`ü yüksek darbe dayanimli polistirenden (HIPS: High Impact Polystyrene) olusan ana malzemeye (base material) köpürtücü ajan ilave edilerek üretilmektedir.
Bulusun bir baska uygulamasinda ara katman (10), yüksek darbe dayanimli polistiren (HIPS), ABS (akrilonitril butadien stiren) ve genel amaçli polistiren (GPPS: general purpose polistiren) karisimi içeren ana malzemeye köpürtücü ajan ilave edilerek üretilmektedir. Bu uygulamada ara katmanin (10) ana malzemesi Ara katmanin (10) HIPS veya HIPS+ABS+GPPS karisimi içeren ana malzemesine üretim esnasinda ekstrüderde %0,5 - 7 oraninda köpürtücü ajan ilave edilmektedir.
Bulus konusu uygulamada kullanilan enkapsüle edilmis köpürtücü ajan, proses sartlarinda kontrollü olarak gaz formuna geçmekte ve ara katmanin (10) ana malzemesi (HIPS, GPPS, ABS) diger bir ifadeyle polimer matriksi içinde kontrollü olarak çözünmektedir. Enkapsüle edilmis sitrik asit (C6H807) ve sodyum bikarbonatin (3NaHCO3), proses sicakliklarina uygun ve ara katmanin (10) ana malzemesi (polimer matriksi) içerisinde çözünme orani yüksek oldugu deneysel çalismalarla tespit edilmistir. Enkapsülasyon prosesinde, köpürtücü ajanin etrafi stiren bazli polimer (polimer sivi) ile kaplanmaktadir ve elde edilen sodyum sitrat dihidrat (C6H5Na307) granülleri küre seklindedir. Köpürtücü ajanin enkapsüle edilmis olmasi sayesinde üretim esnasinda (ekstrüder içerisinde) kontrollü gaz salinimi saglanmakta, homojen bir köpük dagilimi elde edilmektedir. Köpürtücü ajan partiküllerinin etrafinin stiren bazli yani polimer malzeme ile kaplanmasi, malzemenin dogrudan gaz formuna geçmesini azaltarak ekstrüder içerisinde ve dolayisiyla ara katman (10) malzemesi (HIPS, GPPS, ABS) içerisinde homojen olarak yayilmasini saglamaktadir. Köpürtücü ajan enkapsüle edildigi için üretim sirasinda ekstrüder içerisinde sicakliklarin istem disi artmasi Önlenmekte, gaz sahnimi kontrollü olarak gerçeklesmektedir.
Homojen bir köpük dagilimi elde edilmekte ve iç duvarin (5) isi] yalitimi iyilestirilmektedir.
Bulusun bir baska uygulamasinda iç duvarin (5) bölmelere (4) bakan üst katmani (9) parlak (glossy) polistirenden (PS) üretilmektedir. Üst katmanin (9) kimyasal dayaniminin yüksek olmasinin yanisira yüzey pürüzlülügü de istenilen sinirlar arasinda oldugundan, iç duvarda (5) kolay temizlik imkani saglanmakta ve estetik görünüm iyilestirilmektedir.
Bulusun bir baska uygulamasinda iç duvarin (5) poliüretanla (PU) temas eden alt katmani (8), üzerine etkiyen gerilimlere karsi yüksek kirilma dirençli (ESCR: Enviromental Stress Crack Resistance) polistirenden (PS) üretilmekte, Iç duvarin (5) yalitim hacmine (7) enjekte edilen poliüretanin (PU) kürlenmesinde açiga çikan “c-pentane” gibi genlesme gazlarindan dolayi etkiyen gerilimlere karsi mekanik dayanimi arttirilmaktadir.
Bulus konusu buzdolabi (1) iç duvarinin (5) ara katmani (10), parlak polistirenden üretilen üst katman (9) ve ESCR özellikli polistirenden (PS) üretilen alt katmanin (8) arasinda bulundugundan, ara katmanin (10), üst katman (9) ve alt katmanin (8) parlaklik ve mekanik dayanim özelliklerini saglamasi geregi ortadan kaldirilmistir. Ara katmana (10) köpürtücü ajan ilave edilerek hacmi arttirilmakta, iç duvarin (5) ve dolayisiyla buzdolabinin (1) agirligi azaltilmaktadir. Iç duvarin (5) üretiminde malzeme tasarrufu saglanarak maliyet azaltilmaktadir. Kullanlan köpürtücü ajan ile ara katman (10) içinde homojen bir köpük dagilimi elde edilmekte, iç duvarin (5) isi] yalitimi iyilestirilmektedir.

Claims (10)

ISTEMLER
1 - Buzdolabi (1), bir gövde (2), en az bir kapi (3), içine yiyecek ve içecek maddelerinin yerlestirildigi en az bir sogutucu/dondurucu bölme (4), ekstrüzyon yöntemiyle plastik malzemeden üretilen ve gövde (2) ile kapilarin (3) bölmelere (4) bakan iç yüzeylerini olusturan bir iç duvar (5), gövde (2) ve kapilarinin (3) dis tarafini olusturan bir dis duvar (6) ve iç duvar (5) ile dis duvar (6) arasinda yer alan ve içine poliüretan (PU) enjekte edilen bir yalitim hacmi (7) içeren, yalitim hacmi (7) tarafinda yer alan bir alt katman (8), bölmelere (4) bakan iç yüzeyini olusturan bir üst katman (9) ve alt katman (8) ile üst katman (9) arasinda yer alan, polistiren (PS) bazli ana malzemeye köpürtücü ajan ilave edilerek köpürtülen polistirenden (XPS) üretilen bir ara katman (10) içeren iç duvar (5) ile karakterize edilen bir buzdolabi (1).
2 - Sitrik asit (C6H807) ve sodyum bikarbonat (3NaHC03) içeren köpürtücü ajan ile karakterize edilen Istem l,deki gibi bir buzdolabi (l).
3 - %40 - 50 sitrik asit (C içeren sodyum sitrat dihidrat (C6H5Na307) granüllerinden olusan köpürtücü ajan ile karakterize edilen Istem 2”deki gibi bir buzdolabi (1).
4 - Sitrik asit (C bilesimi olan sodyum sitrat dihidrat (C6H5Na307) granülleri, stiren bazli polimer ile kaplanarak enkapsüle edilen köpürtücü ajan ile karakterize edilen Istem 1 ila 39ten herhangi birindeki gibi bir buzdolabi (l).
5 - Tamami yüksek darbe dayanimli polistirenden (HIPS) olusan ana malzemeye (base material) köpürtücü ajan ilave edilerek üretilen ara katman (10) ile karakterize edilen Istem 1*deki gibi bir buzdolabi (1).
6 - Yüksek darbe dayanimli polistiren (HIPS), ABS ve genel amaçli polistiren
(GPPS) karisimi içeren ana malzemeye köpürtücü ajan ilave edilerek üretilen ara katman (10) ile karakterize edilen Istem lideki gibi bir buzdolabi (1). içeren ara katman (10) ile karakterize edilen Istem 6idaki gibi bir buzdolabi (1).
8 - HIPS veya HIPS+ABS+GPPS karisimi içeren ana malzemesine %0,5 - 7 oraninda köpürtücü ajan ilave edilen ara katman (10) ile karakterize edilen Istem 5 ila Tden herhangi birindeki gibi bir buzdolabi (l).
9 - Parlak polistirenden (PS) üretilen bir üst katman (9) içeren iç duvar (5) ile karakterize edilen Istem lideki gibi bir buzdolabi (1).
10 - Yüksek kirilma dirençli (ESCR) polistirenden (PS) üretilen alt katman (8) içeren iç duvar (5) ile karakterize edilen Istem l'deki gibi bir buzdolabi (l).
TR2016/15857A 2016-11-07 2016-11-07 Plasti̇k i̇ç duvar i̇çeren buzdolabi TR201615857A1 (tr)

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US20090246501A1 (en) * 2008-03-26 2009-10-01 Fina Technology, Inc. Reduced Weight Multilayer Polymeric Articles and Methods of Making and Using Same
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