Integrally recyclable full-PET material foam sandwich panel and production process thereof

A foam sandwich panel and production process technology, applied in the field of new composite materials, can solve the problems of wasting resources, non-recyclable, easy to pollute the environment, etc., and achieve the effects of saving production costs, reducing recycling costs, and reducing recycling processes

CN112406208APending Publication Date: 2021-02-26戴铂新材料(张家港)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-26

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Abstract

The invention discloses an integrally recyclable full-PET material foam sandwich panel and a production process thereof. The integrally recyclable full-PET material foam sandwich panel comprises two PET fiber surface layers and a PET foam core, the two PET fiber surface layers are compounded on the upper side and the lower side of the PET foam core, and each PET fiber surface layer comprises low-melting-point PET fibers and common PET fibers; the PET fiber surface layer is formed by combining low-melting-point PET fibers and common PET fibers in a sheath-core structure or in a mixed mode. Theinvention has the following beneficial effects: the material does not contain other reinforced fiber materials, realizes material singleness, can be integrally crushed and recovered without separatingthe surface layer from the core layer during scrapping, reduces environmental pollution and recovery processes, and reduces recovery cost; moreover, the low-melting-point PET fiber is melted at a lowtemperature while the common PET fiber still holds a physical structure, so that since the cooled low-melting-point PET fiber is used as an adhesive film and has good adhesive strength, use of otheradhesive materials is avoided, light weight is facilitated, the cost is saved, and the efficiency is improved.
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Description

technical field

[0001] The invention relates to the technical field of novel composite materials, in particular to an integrally recyclable all-PET material foam sandwich panel and a production process thereof. Background technique

[0002] With the development of the application of composite materials, the foam sandwich structure has become the most potential direction of structural weight reduction at present and in the future. The lightweight technology brought by it is very important to meet the needs of energy saving and environmental protection in many industrial fields, especially for The development of transportation fields such as rail transportation, aerospace, marine ships, and automobiles is particularly critical. For example, according to research data, if the weight of the vehicle is reduced by 10%, the fuel efficiency can be increased by 6%-8%, and the fuel consumption per 100 kilometers can be reduced by 0.3-0.6 liters for every 100 kg of vehicle maintenance....

Examples

Embodiment 1

[0046] The production process of the integrally recyclable full PET material foam sandwich panel of the present invention comprises the following steps:

[0047] 1) Set the density to 60kg / m 3 The PET foam core 2 is cut into 5mm thick and prepared with a grammage of 440g / m 2 PET fiber surface layer 1;

[0048] 2) The PET fiber surface layer 1, the PET foam core 2 and the PET fiber surface layer 1 are sequentially stacked and heated through the continuous heating device 6, the heating temperature is 180-200°C, and the feeding speed is 2m / min;

[0049] 3) The heated PET material is pre-compressed by the compacting device 7, applying a pressure of 0.1Mpa, and cooling by the cooling device 8 at the same time, so that the two-layer PET fiber surface layer 1 and the PET foam core 2 are bonded and then cooled;

[0050] 4) The bonded PET material is cut by the cutting device 9 to make a semi-finished sandwich panel.

[0051] After heating the semi-finished sandwich panel to 180°C, ...

Embodiment 2

[0053] The production process of the integrally recyclable full PET material foam sandwich panel of the present invention comprises the following steps:

[0054] 1) Set the density to 105kg / m 3 The PET foam core 2 is cut into 4mm thick and prepared with a grammage of 400g / m 2 PET fiber surface layer 1;

[0055] 2) The PET fiber surface layer 1, the PET foam core 2 and the PET fiber surface layer 1 are sequentially stacked and heated through the continuous heating device 6, the heating temperature is 180-200°C, and the feeding speed is 2m / min;

[0056] 3) The heated PET material is pre-compressed by the compacting device 7, applying a pressure of 0.1Mpa, and cooling by the cooling device 8 at the same time, so that the two-layer PET fiber surface layer 1 and the PET foam core 2 are bonded and then cooled;

[0057] 4) The bonded PET material is cut by the cutting device 9 to make a semi-finished sandwich panel.

[0058] After heating the semi-finished sandwich panel to 180°C,...

Embodiment 3

[0060] The production process of the integrally recyclable full PET material foam sandwich panel of the present invention comprises the following steps:

[0061] 1) Set the density to 105kg / m 3 The PET foam core 2 is cut into 4mm thick and prepared with a grammage of 600g / m 2 PET fiber surface layer 1;

[0062] 2) The PET fiber surface layer 1, the PET foam core 2 and the PET fiber surface layer 1 are sequentially stacked and heated through the continuous heating device 6, the heating temperature is 180-200°C, and the feeding speed is 2m / min;

[0063] 3) The heated PET material is pre-compressed by the compacting device 7, applying a pressure of 0.1Mpa, and cooling by the cooling device 8 at the same time, so that the two-layer PET fiber surface layer 1 and the PET foam core 2 are bonded and then cooled;

[0064] 4) The bonded PET material is cut by the cutting device 9 to make a semi-finished sandwich panel.

[0065] After heating the semi-finished sandwich panel to 180°C,...