CN106832812B - Application of polyester material in preparation of refrigerator liner plate, refrigerator liner and preparation method of plate - Google Patents
Application of polyester material in preparation of refrigerator liner plate, refrigerator liner and preparation method of plate Download PDFInfo
- Publication number
- CN106832812B CN106832812B CN201710048689.9A CN201710048689A CN106832812B CN 106832812 B CN106832812 B CN 106832812B CN 201710048689 A CN201710048689 A CN 201710048689A CN 106832812 B CN106832812 B CN 106832812B
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- China
- Prior art keywords
- plate
- refrigerator liner
- refrigerator
- preparation
- polyester material
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- 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
- F25D23/10—Arrangements for mounting in particular locations, e.g. for built-in type, for corner type
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Abstract
The invention discloses an application of a polyester material in preparing a refrigerator liner plate, a refrigerator liner, a refrigerator and a preparation method of the refrigerator liner plate, wherein the polyester material is at least one of PET, PBT, PETG, PTT and PCT. According to the technical scheme, the polyester material is applied to the manufacturing of the refrigerator liner plate, so that various physical or chemical properties of the ABS or HIPS plate in the prior art are greatly improved.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to an application of a polyester material in preparation of refrigerator liner plates, a refrigerator liner and a preparation method of the refrigerator liner plates.
Background
The inner container is an important interior trim structural part of the refrigerator, and is mainly formed by vacuum forming of an ABS or HIPS plate at present, the processing technology is complex, and the requirements on the mechanical property and the processing property of the material are high. In the long-term use process, the material is directly contacted with food and the heat-preservation foaming layer as the inner wall of the refrigerator body, so that the material has high requirements on the food safety and the corrosion resistance.
The existing refrigerator liner plate made of ABS or HIPS plate has poor physical or chemical parameters, such as corrosion resistance, mechanical strength, elongation at break, bending resistance, glossiness and the like, and is gradually difficult to meet the requirements of consumers.
Disclosure of Invention
The invention mainly aims to provide application of a polyester material in preparation of an inner container of a refrigerator, and aims to improve the physical or chemical properties of the inner container of the refrigerator and meet the requirements of consumers.
In order to achieve the purpose, the invention provides application of a polyester material in preparing a refrigerator liner plate, wherein the polyester material is at least one of PET, PBT, PETG, PTT and PCT.
Preferably, the polyester material is PETG.
The invention also provides a refrigerator liner, wherein the plate of the refrigerator liner is made of a polyester material, and the polyester material is at least one of PET, PBT, PETG, PTT and PCT.
Preferably, the polyester material is PETG.
Preferably, the refrigerator inner container comprises 92-100 parts by weight of the polyester material and 0.5-8 parts by weight of polyester color masterbatch.
The invention also provides a refrigerator which comprises an inner container, wherein the plate of the inner container of the refrigerator is made of polyester material, and the polyester material is at least one of PET, PBT, PETG, PTT and PCT.
The invention also provides a preparation method of the refrigerator liner plate, which comprises the following steps:
a. and drying the polyester material, wherein the polyester material is at least one of PET, PBT, PETG, PTT and PCT.
b. Forming a plate from the dried polyester material by a co-extrusion process;
c. and rolling and shaping the extruded sheet.
Preferably, the drying temperature in the step a is 50-260 ℃, and the drying time is 20-180 min.
Preferably, the drying temperature is 50-80 ℃, and the drying time is 100-150 min.
Preferably, in the step b, the sheet material is extruded by a single-screw extrusion device, wherein the screw diameter of the single-screw extrusion device is 50 mm-160 mm, and the length-diameter ratio is 1: 20-1: 40.
Preferably, in step b, the processing temperature is between 80 ℃ and 260 ℃.
Preferably, in step c, the rolling temperature is 60 ℃ to 120 ℃.
According to the technical scheme, the polyester material is applied to the manufacturing of the refrigerator liner plate, so that various physical or chemical properties of the ABS or HIPS plate in the prior art are greatly improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an application of a polyester material in preparation of a refrigerator liner, the refrigerator liner prepared by applying the polyester material, a refrigerator comprising the refrigerator liner, and a preparation method of a refrigerator liner plate.
In the embodiment of the invention, the polyester material is applied to preparing the refrigerator liner plate, wherein the polyester material is at least one of PET, PBT, PETG, PTT and PCT. The polyester material can be one of the four materials, or two of the four materials, or three, four or five of the four materials can be mixed according to any ratio.
Of course, PETG is a ternary copolymer polyester taking purified terephthalic acid, ethylene glycol and 1, 4-cyclohexanedimethanol as monomers. The copolyester is a PETG material which is a preferable polyester material because the copolyester has good impact strength, high transparency, high gloss, low halation, no whitening on bending, good heat sealability, scratch resistance, aging resistance, static electricity resistance, excellent chemical resistance, low extractability, hydrolysis resistance, strong tinting strength and good sanitation.
The polyester material plate plastic suction molded refrigerator liner has better surface glossiness, foaming agent corrosion resistance and mechanical property. Meanwhile, the polyester material plate has simple forming process, lower processing temperature and good energy-saving effect. When the refrigerator inner container plate is prepared, partial polyester color master can be added to dye the refrigerator inner container plate so as to meet different requirements of users on color and luster.
In order to verify the physical and chemical properties of the polyester material, PETG was used as a specific example of the test in the following test tests.
(1) And a foaming agent corrosion resistance experiment:
respectively putting the polyester board and the conventional HIPS board into a HFC-245fa + cyclopentane mixed foaming agent, soaking for 5 hours, and observing.
As a result: the conventional HIPS sheet material gradually dissolves along with the prolonging of the soaking time, but the polyester sheet material adopted by the invention has no change.
It can be seen that the polyester sheet has a much stronger corrosion resistance than the HIPS sheet.
(2) Surface gloss test:
and respectively testing the extruded polyester plate and the extruded HIPS plate by using a gloss meter, wherein the testing angle is 60 degrees.
As a result: the gloss of the surface of the polyester plate is 110, and the gloss of the surface of the HIPS plate is 50.
Therefore, the surface gloss of the polyester plate is more than twice that of the HIPS plate.
(3) And testing tensile strength:
and respectively carrying out tensile test on the polyester plate and the HIPS plate after extrusion molding by using a tensile machine.
As a result: the tensile strength of the polyester plate is 50Mpa, and the tensile strength of the HIPS plate is 20Mpa
It can be seen that the tensile strength of the polyester sheet is 2.5 times that of the HIPS sheet.
(4) And testing the bending strength:
and respectively carrying out bending strength tests on the polyester plate and the HIPS plate after extrusion molding.
As a result: the bending strength of the polyester plate is 70MPa, and the bending strength of the HIPS plate is 30 MPa.
Therefore, the bending resistance of the polyester plate is far higher than that of the HIPS plate.
The refrigerator liner plate is different in requirements of users on the refrigerator liner plate, and the refrigerator liner comprises 92-100 parts of polyester material and 0.5-8 parts of polyester color master batch in parts by weight.
The invention also provides a preparation method of the refrigerator liner plate, which comprises the following steps:
a. and drying the polyester material, wherein the polyester material is at least one of PET, PBT, PETG, PTT and PCT.
b. Forming a plate from the dried polyester material by a co-extrusion process;
c. and rolling and shaping the extruded sheet.
The presence of ester groups on the macromolecular chain of polyester is likely to cause reverse esterification (hydrolysis) at high temperatures, thereby causing deterioration in material properties. Therefore, the polyester material must be dried before processing. In general, polyester materials themselves contain 0.5% to 1% moisture. After drying, the moisture content in the polyester material needs to be reduced to 0.02% -0.05%.
The polyester material can be dried in an electrothermal blowing drying oven or a vacuum rotary drum drying oven generally, the drying temperature is 50-260 ℃, and the drying time is 20-180 min.
The polyester material has good stability at the temperature below 100 ℃, and the hydrolysis phenomenon is serious when the temperature reaches above 100 ℃. In the drying process, hydrolysis of the polyester material also occurs, and thus, it is necessary to control the drying temperature and the drying time, i.e., the drying time is properly prolonged at a low temperature. The drying temperature is 50-80 ℃, and the drying time is 100-150 min.
In the step b, a plate is extruded through single-screw extrusion equipment, wherein the diameter of a screw of the single-screw extrusion equipment is 50-160 mm, and the length-diameter ratio of the screw is 1: 20-1: 40.
The diameter of the screw, namely the outer diameter of the screw thread, and the production capacity of the single-screw coextrusion device are approximately proportional to the square of the screw diameter, and when other conditions are the same, the screw diameter is slightly increased, so that the extrusion capacity is remarkably increased, and the influence of the increase of the screw rotation number on the extrusion capacity is even larger than the influence of the increase of the screw rotation number. In the present example, the screw diameter of the single-screw coextrusion apparatus is 50mm to 160 mm.
The screw length-diameter ratio is a ratio of the length L of the working portion of the screw to the screw diameter D, and increasing the length-diameter ratio means increasing the length of the screw at a constant screw diameter. The large L/D value and reasonable temperature distribution are beneficial to the mixing and plasticizing of the polyester material, the heating time of the polyester material in the cylinder is longer, and the plasticizing of the polyester material is sufficient and more uniform. Thereby improving the quality of the plastic. If the length-diameter ratio is increased on the premise of unchanging the plasticizing quality requirement, the rotating speed of the screw can be increased, so that the extrusion capacity of the polyester material is increased. However, with an excessively large length to diameter ratio, the power consumed by the screw will increase correspondingly, and the difficulty in processing and assembling the screw and the barrel will increase. The possibility of the screw bending is also increased, which causes scraping of the screw and the inner wall of the cylinder, and reduces the service life. In addition, in the case of heat-sensitive plastics, an excessively large aspect ratio is thermally decomposed due to a long residence time, and the quality of the sheet material is affected. Therefore, the advantages of increased length-diameter ratio are fully utilized, and the selection is determined according to the physical properties of the processed polyester material and the extrusion quality requirement of the product. In the present embodiment, the aspect ratio is 1:20 to 1: 40.
In step b, the processing temperature must not be too high, otherwise the hydrolysis rate of the polyester material will increase. Also, the processing temperature cannot be too low, otherwise, the polyester sheet is not good in molding effect and is prone to dull cracking. The processing temperature is 80-260 ℃.
In step c, rolling is performed to facilitate the formation of the polyester sheet, and all the restrictions on the rolling temperature are also required, because too high a rolling temperature may make the polyester sheet difficult to shape. And a lower rolling temperature may crack the sheet or cause dull cracking of the sheet. In view of this, in the present embodiment, the rolling temperature is 60 to 120 ℃.
According to the technical scheme, the polyester material is applied to the manufacturing of the refrigerator liner plate, so that various physical or chemical properties of the ABS or HIPS plate in the prior art are greatly improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (7)
- The application of PETG (polyethylene terephthalate glycol) in preparing refrigerator liner plates is characterized in that the PETG is ternary copolyester taking purified terephthalic acid, ethylene glycol and 1, 4-cyclohexanedimethanol as monomers; the preparation method of the refrigerator inner container plate comprises the following steps:a. drying the PETG;b. forming a plate by the dried PETG through a co-extrusion process;c. and rolling and shaping the extruded sheet.
- 2. The preparation method of the refrigerator inner container plate is characterized by comprising the following steps:a. drying the PETG;b. forming a plate by the dried PETG through a co-extrusion process;c. and rolling and shaping the extruded sheet.
- 3. The method for preparing the refrigerator liner plate as claimed in claim 2, wherein the drying temperature in the step a is 50-260 ℃ and the drying time is 20-180 min.
- 4. The preparation method of the refrigerator liner plate as claimed in claim 3, wherein the drying temperature is 50-80 ℃, and the drying time is 100-150 min.
- 5. The preparation method of the refrigerator liner plate as claimed in claim 4, wherein in the step b, the plate is extruded by a single-screw extrusion device, the screw diameter of the single-screw extrusion device is 50 mm-160 mm, and the length-diameter ratio is 1: 20-1: 40.
- 6. The method for preparing the refrigerator liner plate as claimed in claim 4, wherein in the step b, the processing temperature is 80-260 ℃.
- 7. The method for preparing the refrigerator liner plate as claimed in any one of claims 2 to 6, wherein in the step c, the rolling temperature is 60 ℃ to 120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710048689.9A CN106832812B (en) | 2017-01-22 | 2017-01-22 | Application of polyester material in preparation of refrigerator liner plate, refrigerator liner and preparation method of plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710048689.9A CN106832812B (en) | 2017-01-22 | 2017-01-22 | Application of polyester material in preparation of refrigerator liner plate, refrigerator liner and preparation method of plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106832812A CN106832812A (en) | 2017-06-13 |
| CN106832812B true CN106832812B (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710048689.9A Active CN106832812B (en) | 2017-01-22 | 2017-01-22 | Application of polyester material in preparation of refrigerator liner plate, refrigerator liner and preparation method of plate |
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| Country | Link |
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| CN (1) | CN106832812B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR201709820A2 (en) * | 2017-07-04 | 2019-01-21 | Arcelik As | REFRIGERATOR WITH PLASTIC INNER WALL |
| CN107698947A (en) * | 2017-10-27 | 2018-02-16 | 合肥华凌股份有限公司 | Modification polyester materials and its preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791639A (en) * | 2003-05-15 | 2006-06-21 | 纳幕尔杜邦公司 | Fast crystallizing polyester compositions |
| CN1856544A (en) * | 2003-09-24 | 2006-11-01 | E.I.内穆尔杜邦公司 | Electrically conductive thermoplastic compositions |
| CN102134378A (en) * | 2010-01-21 | 2011-07-27 | 顾红军 | Polyester composite material with controllable crystallinity for sheet material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479309B (en) * | 2015-01-17 | 2017-10-27 | 上海青品新材料科技有限公司 | Modified poly ester composition and by its obtained material |
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2017
- 2017-01-22 CN CN201710048689.9A patent/CN106832812B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791639A (en) * | 2003-05-15 | 2006-06-21 | 纳幕尔杜邦公司 | Fast crystallizing polyester compositions |
| CN1856544A (en) * | 2003-09-24 | 2006-11-01 | E.I.内穆尔杜邦公司 | Electrically conductive thermoplastic compositions |
| CN102134378A (en) * | 2010-01-21 | 2011-07-27 | 顾红军 | Polyester composite material with controllable crystallinity for sheet material |
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| CN106832812A (en) | 2017-06-13 |
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