CN211763988U - PET foaming sheet material with multilayer structure - Google Patents
PET foaming sheet material with multilayer structure Download PDFInfo
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- CN211763988U CN211763988U CN201922241704.9U CN201922241704U CN211763988U CN 211763988 U CN211763988 U CN 211763988U CN 201922241704 U CN201922241704 U CN 201922241704U CN 211763988 U CN211763988 U CN 211763988U
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Abstract
The utility model provides a multilayer structure's PET foaming sheet, including five layers of ABCBA lamellar structure, the A layer comprises the new material of PET, and the B layer comprises r-PET reworked material, and the C layer is sent out by r-PET reworked material microporeAnd (4) soaking. The total thickness of the sheet is 0.5-3.0mm, the layer A, the layer B, the layer C, the layer B and the layer A are respectively 10-15:10-15:40-60:10-15: 10-15. The viscosity of the new PET material of the layer A is 0.80-0.86dl/g, the viscosity of the r-PET reclaimed material of the layer B is 0.68-0.78dl/g, the viscosity and bulk specific gravity of the r-PET reclaimed material of the layer C are respectively IV0.68-0.78dl/g and 0.40-0.70g/cm3. The PET sheet material has the same functions as a PET sheet material processed by a new material, and 70-80% of raw materials adopt a regenerated material, so that the application field of the regenerated plastic is expanded, and the development concept of plastic recycling is met. Compared with the conventional PET sheet, the PET foamed sheet has wider application fields, and can be applied to the fields of microwave oven containers, refrigerator linings, roof heat insulation, electric wire insulation and the like besides the conventional packaging of foods, medicines and electronic products.
Description
Technical Field
The utility model relates to a sheet for packing, concretely relates to multilayer structure's PET foaming sheet.
Background
PET (polyethylene terephthalate) sheet is a high molecular material with excellent comprehensive performance, good mechanical property, good glossiness, toughness, folding resistance, good gas barrier property, chemical corrosion resistance, no toxicity and no peculiar smell. Is widely applied to the field of packaging of food, medicine, hardware, electric appliances and artware. However, most of the PET sheets currently on the market are mainly of a single-layer structure, and are manufactured by adopting a PET new material or mixing a certain proportion of leftover materials into the new material. The PET mineral water bottle and the beverage bottle which are used in China every year are about 500 million tons, most of the cleaned PET bottles are processed into fiber products, and a small part of PET reclaimed materials are processed into PET sheets. However, the sheet directly processed from the PET reclaimed material does not meet the requirement of food and drug packaging safety, and the application is limited.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a multilayer structure's PET foaming sheet.
The utility model provides a technical scheme that its technical problem adopted is: a PET foamed sheet with a multilayer structure comprises a five-layer ABCBA laminated structure, wherein a layer A is composed of a PET new material, a layer B is composed of an r-PET regenerated material, and a layer C is composed of r-PET regenerated material microcellular foam.
The total thickness of the ABCBA five-layer thin sheet of the PET foaming sheet is 0.5-3.0 mm.
The thickness ratio of the layer A to the layer B to the layer C to the layer B to the layer A of the PET foamed sheet is 10-15:10-15:40-60:10-15:10-15, respectively.
The viscosity of the A layer PET new material of the PET foaming sheet is IV0.80-0.86 dl/g.
The viscosity of the R-PET reclaimed material of the layer B of the PET foamed sheet is IV0.68-0.78 dl/g.
The viscosity of the r-PET reclaimed material of the C layer of the PET foamed sheet is IV0.68-0.78 dl/g.
The C layer r-PET reclaimed material micropore foaming layer of the PET foaming sheet has the bulk specific gravity of 0.40-0.70g/cm3。
According to the PET sheet adopting the technical scheme, the new PET material of the layer A, the r-PET reclaimed material of the layer B and the r-PET reclaimed foaming material of the layer C are co-extruded by three extruders and then are converged in a composite distributor, and five layers of material flows are superposed and extruded and shaped through a clothes hanger type opening die to obtain the ABCBA five-layer structure composite sheet.
The layer A adopts a new PET material, so that the related requirements of food and medicine packaging can be met under a normal process.
The layer B adopts r-PET reclaimed materials, so that the use cost of PET raw materials can be greatly reduced, the use of reclaimed plastics is promoted, and the development concept of plastic recycling is met.
And the layer C adopts r-PET reclaimed materials for microcellular foaming, and the foaming ratio is 2-3 times. The foamed PET sheet has the advantages of light weight and lower cost, and the foamed product has better insulating property and heat resistance and more excellent performance-cost ratio than an unfoamed product.
The utility model has the advantages that: the utility model discloses have the same function with the PET sheet of new material processing, the reclaimed materials is adopted to 70-80% of raw and other materials, has expanded reclaimed plastic's application, accords with plastics cyclic utilization's development theory. Compared with the conventional PET sheet, the PET foamed sheet has wider application fields, and can be applied to the fields of microwave oven containers, refrigerator linings, roof heat insulation, electric wire insulation and the like besides the conventional packaging of foods, medicines and electronic products.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further clearly understood by the following specific examples of the present invention, which are given below, but the following examples are not intended to limit the present invention.
Example 1: referring to fig. 1, the PET foamed sheet with the multilayer structure comprises a five-layer ABCBA layered structure, wherein a layer 1 is made of a PET new material, a layer 2 is made of an r-PET regenerated material, and a layer 3 is made of r-PET regenerated material through microcellular foaming.
The total thickness of the ABCBA five-layer thin sheet of the PET foaming sheet is 0.5-3.0 mm.
The thickness ratio of the five layers of the PET foamed sheet, namely the layer A1, the layer B2, the layer C3, the layer B2 and the layer A1, is 10-15:10-15:40-60:10-15:10-15 respectively.
The viscosity of the PET fresh material of the layer A1 of the PET foamed sheet is IV0.80-0.86 dl/g.
The viscosity of the r-PET reclaimed material of the B layer 2 of the PET foamed sheet is IV0.68-0.78 dl/g.
The viscosity of r-PET reclaimed material of the C layer 3 of the PET foamed sheet is IV0.68-0.78 dl/g.
The C layer 3 of the PET foaming sheet material has the r-PET reclaimed material micropore foaming layer with the bulk specific gravity of 0.40-0.70g/cm3。
Claims (7)
1. A PET foamed sheet with a multilayer structure comprises a five-layer ABCBA laminated structure, and is characterized in that a layer A is composed of a PET new material, a layer B is composed of an r-PET regenerated material, and a layer C is composed of r-PET regenerated material microcellular foam.
2. The PET foamed sheet having a multilayer structure according to claim 1, wherein: the total thickness of the ABCBA five-layer thin slice is 0.5-3.0 mm.
3. The PET foamed sheet having a multilayer structure according to claim 2, wherein: the thickness ratio of the A layer, the B layer, the C layer, the B layer and the A layer of the ABCBA five-layer sheet is 10-15:10-15:40-60:10-15:10-15 respectively.
4. The PET foamed sheet having a multilayer structure according to claim 1, wherein: the viscosity of the new PET material of the layer A is IV0.80-0.86 dl/g.
5. The PET foamed sheet having a multilayer structure according to claim 1, wherein: the viscosity of the r-PET reclaimed material of the layer B is IV0.68-0.78 dl/g.
6. The PET foamed sheet having a multilayer structure according to claim 1, wherein: the viscosity of the layer C r-PET reclaimed material is IV0.68-0.78 dl/g.
7. The multilayer PET foamed sheet according to claim 6, wherein: the stacking specific gravity of the C layer r-PET reclaimed material micropore foaming layer is 0.40-0.70g/cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922241704.9U CN211763988U (en) | 2019-12-15 | 2019-12-15 | PET foaming sheet material with multilayer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922241704.9U CN211763988U (en) | 2019-12-15 | 2019-12-15 | PET foaming sheet material with multilayer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211763988U true CN211763988U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922241704.9U Active CN211763988U (en) | 2019-12-15 | 2019-12-15 | PET foaming sheet material with multilayer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211763988U (en) |
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2019
- 2019-12-15 CN CN201922241704.9U patent/CN211763988U/en active Active
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