WO2019007830A1 - A refrigerator comprising a plastic inner lining - Google Patents

A refrigerator comprising a plastic inner lining Download PDF

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Publication number
WO2019007830A1
WO2019007830A1 PCT/EP2018/067550 EP2018067550W WO2019007830A1 WO 2019007830 A1 WO2019007830 A1 WO 2019007830A1 EP 2018067550 W EP2018067550 W EP 2018067550W WO 2019007830 A1 WO2019007830 A1 WO 2019007830A1
Authority
WO
WIPO (PCT)
Prior art keywords
polystyrene
inner lining
refrigerator
produced
inorganic filler
Prior art date
Application number
PCT/EP2018/067550
Other languages
French (fr)
Inventor
Hakan OZKAN
Emre DEMIRTAS
Mustafa SEZER
Orkun KAYMAKCI
Umut KILIC
Original Assignee
Arcelik Anonim Sirketi
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
Application filed by Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2019007830A1 publication Critical patent/WO2019007830A1/en

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Classifications

    • 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
    • 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
    • F25D23/062—Walls defining a cabinet
    • F25D23/064—Walls defining a cabinet formed by moulding, e.g. moulding in situ

Definitions

  • the present invention relates to a refrigerator wherein plastic is used for producing the body inner linings.
  • the bodies and doors of the refrigerators are composed of an inner lining and an outer wall that surround the compartments wherein the foodstuffs are placed, and an insulation material such as polyurethane is injected into the volume between the inner lining and the outer wall.
  • the plastic sheets forming the bodies and door inner linings of the refrigerators have generally two-layer structures and produced from styrene-based plastic material by extrusion, and then, the inner lining is formed by the thermoforming method.
  • the lower layer of the refrigerator inner lining in contact with the polyurethane is produced from a plastic material called HIPS (High impact polystyrene) resistant against polyurethane chemicals.
  • inorganic additives such as calcium carbonate, talc and silica are added to the high impact polystyrene (HIPS) used for the production of the inner lining, the products costs are substantially reduced, but the fragility of the plastic material increases. Therefore, problems arise during the thermoforming process, and in particular, the deep-drawing process cannot be realized. Moreover, since said inorganic filler materials increase the surface energy of the plastic material, the compatibility of the high impact polystyrene (HIPS) and the polyurethane cannot be obtained at the region in contact with the polyurethane.
  • HIPS high impact polystyrene
  • a refrigerator comprising a plastic inner lining having a main layer produced from a blend of high impact polystyrene (HIPS) and inorganic filler materials such as calcium carbonate, talc or silica.
  • HIPS high impact polystyrene
  • inorganic filler materials such as calcium carbonate, talc or silica.
  • the aim of the present invention is the realization of a refrigerator comprising an inner lining that is produced from plastic material, with decreased costs thanks to the addition of high percentage of inorganic filler materials to the blend, wherein problems arising from said inorganic filler materials are eliminated.
  • the body and the door inner linings are produced from plastic sheets by extrusion.
  • the inner sheet used for producing the inner lining comprises an inorganic filler material such as calcium carbonate, talc, mica or kaolin added by at least 35% to the polystyrene(PS)-based base material.
  • an inorganic filler material such as calcium carbonate, talc, mica or kaolin added by at least 35% to the polystyrene(PS)-based base material.
  • vinyl-acrylic copolymer emulsion acting as the binding material is used between the inorganic filler material and the polystyrene(PS)-based base material.
  • Figure 1 - is the schematic view of a refrigerator.
  • Figure 2 - is the schematic view of the lining structure of the refrigerator of the present invention.
  • the refrigerator (1) comprises a body (2); at least one door (3), at least one fresh food/freezing compartment (4) wherein foodstuffs and beverages are placed; an inner lining (5) that is produced from plastic material by extrusion method and that forms the inner surfaces of the body (2) and the doors (3) facing the compartments (4); an outer wall (6) that forms the outer surface of the body (2) and the doors (3), and an insulation volume (7) that is disposed between the inner lining (5) and the outer wall (6) and wherein polyurethane (PU) is injected.
  • PU polyurethane
  • the inner lining (5) is produced from the plastic sheet comprising
  • the inner sheet used for producing the inner lining (5) comprises at least 35% inorganic filler material such as calcium carbonate, talc, mica or kaolin.
  • the plastic sheet comprising
  • HIPS high impact polystyrene
  • LLDPE linear low-density polyethylene
  • binding material comprising vinyl acetate/acrylic copolymer
  • the vinyl-acrylic copolymer emulsion added to the inorganic filler material acts as the binding material between the inorganic filler material and the high impact polystyrene (HIPS). Problems encountered during the thermoforming of the plastic sheet, in particular during the deep-drawing process are eliminated. Flexibility and mechanical characteristics such as yield, impact and bending strength are improved. By providing the desired level of surface energy, the problem of compatibility with polyurethane is eliminated. Resistance against ultraviolet rays is increased.
  • HIPS high impact polystyrene

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to a refrigerator (1) comprising a body (2); at least one door (3), at least one fresh food/freezing compartment (4) wherein foodstuffs and beverages are placed; an inner lining (5) that is produced from plastic material by extrusion method and that forms the inner surfaces of the body (2) and the doors (3) facing the compartments (4); an outer wall (6) that forms the outer surface of the body (2) and the doors (3), and an insulation volume (7) that is disposed between the inner lining (5) and the outer wall (6) and wherein polyurethane (PU) is injected.

Description

A REFRIGERATOR COMPRISING A PLASTIC INNER LINING
The present invention relates to a refrigerator wherein plastic is used for producing the body inner linings.
The bodies and doors of the refrigerators are composed of an inner lining and an outer wall that surround the compartments wherein the foodstuffs are placed, and an insulation material such as polyurethane is injected into the volume between the inner lining and the outer wall. The plastic sheets forming the bodies and door inner linings of the refrigerators have generally two-layer structures and produced from styrene-based plastic material by extrusion, and then, the inner lining is formed by the thermoforming method. The lower layer of the refrigerator inner lining in contact with the polyurethane is produced from a plastic material called HIPS (High impact polystyrene) resistant against polyurethane chemicals. If inorganic additives such as calcium carbonate, talc and silica are added to the high impact polystyrene (HIPS) used for the production of the inner lining, the products costs are substantially reduced, but the fragility of the plastic material increases. Therefore, problems arise during the thermoforming process, and in particular, the deep-drawing process cannot be realized. Moreover, since said inorganic filler materials increase the surface energy of the plastic material, the compatibility of the high impact polystyrene (HIPS) and the polyurethane cannot be obtained at the region in contact with the polyurethane.
In the European Patent No. EP2452138 (B1), a refrigerator is disclosed, comprising a plastic inner lining having a main layer produced from a blend of high impact polystyrene (HIPS) and inorganic filler materials such as calcium carbonate, talc or silica.
The aim of the present invention is the realization of a refrigerator comprising an inner lining that is produced from plastic material, with decreased costs thanks to the addition of high percentage of inorganic filler materials to the blend, wherein problems arising from said inorganic filler materials are eliminated.
In the refrigerator realized in order to attain the aim of the present invention, the body and the door inner linings are produced from plastic sheets by extrusion. The inner sheet used for producing the inner lining comprises an inorganic filler material such as calcium carbonate, talc, mica or kaolin added by at least 35% to the polystyrene(PS)-based base material. In the production of the plastic sheet with high percentage of inorganic filler material, vinyl-acrylic copolymer emulsion acting as the binding material is used between the inorganic filler material and the polystyrene(PS)-based base material.
The refrigerator realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 - is the schematic view of a refrigerator.
Figure 2 - is the schematic view of the lining structure of the refrigerator of the present invention.
The elements illustrated in the figures are numbered as follows:
  1. Refrigerator
  2. Body
  3. Door
  4. Compartment
  5. Inner lining
  6. Outer wall
  7. Insulation volume
The refrigerator (1) comprises a body (2); at least one door (3), at least one fresh food/freezing compartment (4) wherein foodstuffs and beverages are placed; an inner lining (5) that is produced from plastic material by extrusion method and that forms the inner surfaces of the body (2) and the doors (3) facing the compartments (4); an outer wall (6) that forms the outer surface of the body (2) and the doors (3), and an insulation volume (7) that is disposed between the inner lining (5) and the outer wall (6) and wherein polyurethane (PU) is injected.
In the refrigerator (1) of the present invention, the inner lining (5) is produced from the plastic sheet comprising
- an inorganic filler material added to the polystyrene(PS)-based base material and
- vinyl acetate/acrylic copolymer emulsion - or vinyl-acrylic copolymer emulsion by trade name - acting as the binding material between the inorganic filler material and the polystyrene(PS)-based base material.
The inner sheet used for producing the inner lining (5) comprises at least 35% inorganic filler material such as calcium carbonate, talc, mica or kaolin.
In an embodiment of the present invention, the plastic sheet comprising
- 5-40% high impact polystyrene (HIPS)
- 2-15% general purpose polystyrene (GPPS), and
- 2-10% butadien - styrene(BS)-based compatibilizer,
that form the polystyrene(PS)-based base material, and
a blend of
- 5-30% linear low-density polyethylene (LLDPE)
- 35-60% inorganic filler material,
- 2-15% binding material comprising vinyl acetate/acrylic copolymer, and
- 0.01-2% lubricant
that is to the above-mentioned polystyrene(PS)-based base material
is used in the production of the inner lining (5).
By using high percentage of inorganic filler material in the production of the inner lining (5) of the refrigerator (1), cost advantage is provided. The vinyl-acrylic copolymer emulsion added to the inorganic filler material acts as the binding material between the inorganic filler material and the high impact polystyrene (HIPS). Problems encountered during the thermoforming of the plastic sheet, in particular during the deep-drawing process are eliminated. Flexibility and mechanical characteristics such as yield, impact and bending strength are improved. By providing the desired level of surface energy, the problem of compatibility with polyurethane is eliminated. Resistance against ultraviolet rays is increased.

Claims (3)

  1. A refrigerator (1) comprising a body (2); at least one door (3); at least one fresh food/freezing compartment (4) wherein foodstuffs and beverages are placed; an inner lining (5) that is produced from plastic material by extrusion method, that forms the inner surfaces of the body (2) and the doors (3) facing the compartments (4) and that is produced from a plastic sheet comprising polystyrene(PS)-based material; an outer wall (6) that forms the outer surfaces of the body (2) and the doors (3), and an insulation volume (7) that is disposed between the inner lining (5) and the outer wall (6) and wherein polyurethane (PU) is injected, characterized by the inner lining (5) that is produced from
    - an inorganic filler material added to the polystyrene(PS)-based base material and
    - vinyl acetate/acrylic copolymer emulsion acting as the binding material between the inorganic filler material and the polystyrene(PS)-based base material.
  2. A refrigerator (1) as in Claim 1, characterized by the inner lining (5) produced from the plastic sheet comprising an inorganic filler material such as calcium carbonate, talc, mica or kaolin added by at least 35% to the polystyrene(PS)-based base material.
  3. A refrigerator (1) as in Claim 1 or 2, characterized by the inner lining (5) produced from the plastic sheet comprising
    - 5-40% high impact polystyrene (HIPS)
    - 2-15% general purpose polystyrene (GPPS), and
    - 2-10% butadien - styrene(BS)-based compatibilizer,
    that form the polystyrene(PS)-based base material, and
    a blend of
    - 5-30% linear low-density polyethylene (LLDPE)
    - 35-60% inorganic filler material,
    - 2-15% binding material comprising vinyl acetate/acrylic copolymer, and
    - 0.01-2% lubricant
    that is to the above-mentioned polystyrene(PS)-based base material.
PCT/EP2018/067550 2017-07-04 2018-06-29 A refrigerator comprising a plastic inner lining WO2019007830A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2017/09825 2017-07-04
TR2017/09825A TR201709825A2 (en) 2017-07-04 2017-07-04 REFRIGERATOR WITH PLASTIC INNER WALL

Publications (1)

Publication Number Publication Date
WO2019007830A1 true WO2019007830A1 (en) 2019-01-10

Family

ID=62784169

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/067550 WO2019007830A1 (en) 2017-07-04 2018-06-29 A refrigerator comprising a plastic inner lining

Country Status (2)

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TR (1) TR201709825A2 (en)
WO (1) WO2019007830A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742011A (en) * 1953-04-28 1955-12-14 Westinghouse Electric Int Co Improvements in or relating to unitary thermally insulating members
GB796202A (en) * 1955-03-24 1958-06-04 Gen Motors Corp Improved thermal insulation for refrigerators
EP0150942A2 (en) * 1984-01-12 1985-08-07 Mitsubishi Petrochemical Co., Ltd. Composite heat-insulating material containing a cellular urethane
EP2452138B1 (en) 2009-07-07 2013-08-14 Arçelik Anonim Sirketi A refrigerator comprising plastic inner liner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742011A (en) * 1953-04-28 1955-12-14 Westinghouse Electric Int Co Improvements in or relating to unitary thermally insulating members
GB796202A (en) * 1955-03-24 1958-06-04 Gen Motors Corp Improved thermal insulation for refrigerators
EP0150942A2 (en) * 1984-01-12 1985-08-07 Mitsubishi Petrochemical Co., Ltd. Composite heat-insulating material containing a cellular urethane
EP2452138B1 (en) 2009-07-07 2013-08-14 Arçelik Anonim Sirketi A refrigerator comprising plastic inner liner

Also Published As

Publication number Publication date
TR201709825A2 (en) 2019-01-21

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