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Method for degrading plastic products

A product, plastic technology, applied in the field of degradable plastic products

Pending Publication Date: 2022-08-02
까르비오
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting monomers / oligomers can be recycled and used to remanufacture plastic items, so these processes lead to an infinite recycling of plastics

Method used

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  • Method for degrading plastic products
  • Method for degrading plastic products
  • Method for degrading plastic products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Example 1 - Method for degrading a plastic product comprising PET, including a meltblown spinning step Meltblown spinning step

[0123] Use equipped with a filter area of ​​564cm 2 Intarema 1108TE extruder with melt filter SC_4_134_RTF to extrude pigmented and washed flakes from 98% PET PET bottles to obtain pellets. Pelletization was carried out using an ECON UWP EUP 150 underwater pelletizer whose die contained 8 holes, each with a diameter of 2.9 mm. The extrusion temperature range used was 265°C to 285°C, and the screw speed was 155 rpm.

[0124] Some pellets have been used as controls (C1), while others have been dried at 80°C for 6 hours and used in the melt spinning step (nonwoven manufacture).

[0125] The meltblown spinning machine was from Hills Inc (FL, USA), as shown in Table 1.

[0126] Table 1: Characteristics of Meltblown Spinning Machine

[0127]

[0128] The parameters used for nonwoven production by melt spinning and their main properties are ...

Embodiment 2

[0148] Example 2 - Method for degrading a plastic product comprising PET, including a multifilament production step

[0149] A) Multifilament production steps

[0150] Pigmented and washed flakes from PET bottles containing 95% PET were extruded using the same extruder as in Example 1-A. Some pellets from this step with a crystallinity level of 16% were used as a control (referred to as C3). The other pellets were dried at 140°C for 4 hours before extrusion spinning.

[0151] The spinning machine used for multifilament production was a Hills Inc (FL, USA) machine equipped with a 19 mm (3 / 4") single screw extruder with an L / D ratio of 30:1, consisting of 3 zones. The melt spinning process consisted of a melt pump and a multifilament spinneret with 36 holes each 0.6 mm in diameter, a take-up roll (R1), a draw roll (R2) and a relaxation roll (R3) and a winding roll device.

[0152] The temperature used for extrusion from the first extruder zone to the spinneret was 265°C-27...

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Abstract

The invention relates to a method for degrading a plastic product comprising at least one polymer, said method comprising subjecting the plastic product to a spinning step to obtain fibres of said plastic product; and depolymerizing the at least one polymer of the fibers.

Description

technical field [0001] The present invention relates to a method for degrading plastic products. The method of the invention comprises in particular the steps of spinning a plastic product, followed by depolymerization of at least one polymer of the spun plastic product. The method of the present invention is particularly suitable for degrading plastic products comprising polyesters and / or polyamides, preferably polyethylene terephthalate and / or polylactic acid. The present invention also relates to a method of producing monomers and / or oligomers from spun plastic products. Background technique [0002] Plastics are inexpensive and durable materials that can be used to manufacture various products in a wide range of applications (food packaging, textiles, etc.). As a result, the production of plastics has increased dramatically over the past few decades. Additionally, most of them are used in single-use, disposable applications such as packaging, agricultural films, dispo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/10C08L67/00
CPCC08J11/105C08J2367/02C08J2367/04Y02W30/62
Inventor M·阿鲁伊·达利贝
Owner 까르비오