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Biodegradable high-toughness polylactic acid straw

A biodegradable, high-toughness technology, applied in the direction of bio-packaging, climate sustainability, sustainable packaging, etc., can solve the problems of low notch impact performance, inability to cut, and brittle tube blanks, etc., to improve the notch impact performance of straws, Effects of promoting compatibility and stabilizing material properties

Pending Publication Date: 2022-05-27
莱涤新材料(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using PLA and PBAT to prepare straws, there is often a phenomenon that the tube blank is very brittle and cannot be cut
[0004] In order to solve the above problems, the prior art usually adopts the method of adding plasticizer to the raw material to improve the ductility and flexibility of the material, so as to solve the problem that the tube blank is brittle and cannot be cut
Yet the notched impact performance of the straw that above-mentioned scheme obtains is still relatively low (often lower than 4KJ / m 2 ), causing the straw to break easily when cutting

Method used

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  • Biodegradable high-toughness polylactic acid straw

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] In the present invention, the preparation method of the biodegradable high-toughness polylactic acid straw preferably comprises: mixing the PLLA, PBAT, compatibilizer, coupling agent, nucleating agent, chain extender, dispersing agent, filler and The plasticizer is mixed, followed by granulation, drying, extrusion molding and annealing in sequence to obtain a biodegradable high-toughness polylactic acid straw.

[0051] In the present invention, the PLLA, PBAT, compatibilizer, nucleating agent and filler are preferably dried before mixing. The present invention does not specifically stipulate the drying method, and the drying method well-known to those skilled in the art can be used to remove the moisture in the above-mentioned raw materials. In the present invention, the above-mentioned raw materials are dried in advance, so that the influence of the moisture in the raw materials on the granulation process can be avoided, thereby reducing the performance of the straw. ...

Embodiment 1

[0063] Components and dosage: 58 parts of L130, 12 parts of TH801T, 5 parts of PBST-g-GMA, 3 parts of D070, 0.8 parts of epoxidized soybean oil, 0.4 parts of ADR-4400, 0.5 parts of EBS and 20 parts of activated XF-10.

[0064] Pretreatment: (1) D070, L130, TH801T and PBST-g-GMA were dried in a blast oven at 80°C for 4h; HTP05L and XF-10 were dried in a blast oven at 105°C for 4h.

[0065] (2) 99 parts of nano calcium carbonate and 1 part of aluminum-titanium coupling agent were stirred at 90° C. for 5 minutes to obtain activated XF-10.

[0066] Specific preparation process:

[0067] (1) L130, TH801T, PBST-g-GMA, D070 and 0.8 part of epoxidized soybean oil of above-mentioned parts by weight were mixed for 3min, followed by adding 0.4 part of ADR-4400, 0.5 part of EBS, 20 parts of activated XF-10 to high Mixing at room temperature in the mixer for 8min to obtain a mixture;

[0068] (II) adding the mixture obtained in step (I) into the twin-screw extruder and extruding pellets ...

Embodiment 2

[0073] The preparation process is the same as in Example 1, except that the components and dosages are: 58 parts of L130, 12 parts of TH801T, 5 parts of PBST-g-GMA, 5 parts of D070, 0.8 parts of epoxidized soybean oil, 0.4 parts of ADR-4400, 0.5 parts EBS and 20 parts activated XF-10.

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Abstract

The invention relates to the technical field of polylactic acid materials, and provides a biodegradable high-toughness polylactic acid straw which comprises the following components in parts by weight: 5-95 parts of PLLA, 1-50 parts of PBAT, 3-10 parts of a compatilizer, 0.01-20 parts of a nucleating agent, 0.01-5 parts of a dispersing agent, 0.01-5 parts of a plasticizer, 0.01-5 parts of a coupling agent, 0.01-5 parts of a chain extender and 1-95 parts of filler. Wherein the compatilizer can promote the compatibility among the raw materials; in the extrusion forming process of the PLLA, quasi-orthorhombic crystals and orthorhombic crystals can be generated during crystallization of the PLLA; the nucleating agent can promote further stereorecombination of quasi-orthorhombic crystals and orthorhombic crystals formed by the PLLA to generate a steric compound with a more stable crystal structure, and the compound forms a triangular crystal nucleus and a unique crystallization mode at the initial stage of crystallization, so that the material performance is more stable, and the impact performance of the straw notch is further improved.

Description

technical field [0001] The invention relates to the technical field of polylactic acid materials, in particular to a biodegradable high-toughness polylactic acid straw. Background technique [0002] The straw is a cylindrical, hollow plastic product. Its main function is to drink beverages in a cup, and it is also used to suck the bone marrow of some cooked animal long bones. [0003] In the prior art, polylactic acid (PLA) and polybutylene adipate / terephthalate (PBAT) are common raw materials for preparing straws. Among them, PLA has high rigidity and crystallinity; PBAT has both the characteristics of polyadipate PBA and butylene terephthalate PBT, not only good ductility and elongation at break, but also good heat resistance and impact performance, while both PLA and PBAT have good biodegradability. However, when using PLA and PBAT to prepare straws, there is often a phenomenon that the tube blank is very brittle and cannot be cut. [0004] In order to solve the above ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L51/08C08K5/00
CPCC08L67/04C08L2201/06C08L2203/18C08L2205/08C08L2205/24C08L67/02C08L51/08C08K5/0083Y02W90/10
Inventor 吴思源赵斌周再民杨洋索原杰
Owner 莱涤新材料(宁波)有限公司