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PLA-based degradable adhesive tape

A technology of adhesive tape and substrate layer, which is applied in the field of degradable packaging material preparation, can solve the problems of poor waterproof performance and few PLA-based degradable tapes, and achieve the effects of improving toughness, excellent biodegradability, and reducing costs

Inactive Publication Date: 2022-02-08
ZHEJIANG GREAT SHENGDA PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic research and development of PLA-based biodegradable tapes is less, and the waterproof performance of existing PLA-based biodegradable tapes is poor

Method used

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  • PLA-based degradable adhesive tape
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  • PLA-based degradable adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of substrate layer

[0022] Stir a mixture of 50 parts of polylactic acid (PLA), 20 parts of PBAT, 20 parts of tapioca starch, 5 parts of nanocellulose and 4 parts of glycerol at 120°C to 150°C for 20 to 30 minutes, then add 0.5 parts of diperoxide Cumene (DCP) and 0.5 parts of zinc stearate are stirred evenly to obtain a mixture; the mixture is extruded and blown into a film to obtain a substrate layer; the semi-finished film is stretched and first dried; The temperature of the first drying treatment step is 170-180°C, and the drying time is 5-10s.

[0023] (2) Preparation of adhesive layer

[0024] Dissolve 5 parts of gelatin in 150 parts of distilled water at 40-50°C, wait until completely dissolved, mix evenly, and let stand for 24 hours to obtain the first glue solution.

[0025] Dissolve 5 parts of 1799 powdered polyvinyl alcohol resin in 150 parts of distilled water at 80-85°C, wait until completely dissolved, mix evenly, and let stand for 24 ho...

Embodiment 2

[0030] (1) Preparation of substrate layer

[0031] Stir a mixture of 60 parts of polylactic acid (PLA), 15 parts of PBAT, 15 parts of tapioca starch, 5 parts of nanocellulose and 4 parts of glycerol at 120°C to 150°C for 20 to 30 minutes, then add 0.5 parts of diperoxide Cumene (DCP) and 0.5 parts of zinc stearate are stirred evenly to obtain a mixture; the mixture is extruded and blown into a film to obtain a substrate layer; the semi-finished film is stretched and first dried; The temperature of the first drying treatment step is 170-180°C, and the drying time is 5-10s.

[0032] (2) Preparation of adhesive layer

[0033] Dissolve 5 parts of gelatin in 150 parts of distilled water at 40-50°C, wait until completely dissolved, mix evenly, and let stand for 24 hours to obtain the first glue solution.

[0034] Dissolve 5 parts of 1799 powdered polyvinyl alcohol resin in 150 parts of distilled water at 80-85°C, wait until completely dissolved, mix evenly, and let stand for 24 ho...

Embodiment 3

[0039] (1) Preparation of substrate layer

[0040] Stir a mixture of 70 parts of polylactic acid (PLA), 10 parts of PBAT, 10 parts of tapioca starch, 5 parts of nanocellulose and 4 parts of glycerol at 120°C to 150°C for 20 to 30 minutes, then add 0.5 parts of diperoxide Cumene (DCP) and 0.5 parts of zinc stearate are stirred evenly to obtain a mixture; the mixture is extruded and blown into a film to obtain a substrate layer; the semi-finished film is stretched and first dried; The temperature of the first drying treatment step is 170-180°C, and the drying time is 5-10s.

[0041] (2) Preparation of adhesive layer

[0042] Dissolve 5 parts of gelatin in 150 parts of distilled water at 40-50°C, wait until completely dissolved, mix evenly, and let stand for 24 hours to obtain the first glue solution.

[0043] Dissolve 5 parts of 1799 powdered polyvinyl alcohol resin in 150 parts of distilled water at 80-85°C, wait until completely dissolved, mix evenly, and let stand for 24 ho...

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Abstract

The invention discloses a PLA-based degradable adhesive tapewhich comprises a release layer, a base material layer and an adhesive layer; the base material layer is prepared from the following raw materials: PLA (polylactic acid), PBAT (butylene adipate-terephthalate) copolymer, starch, nano cellulose, a plasticizer, a cross-linking agent and a stabilizer; the release layer is prepared from a raw material containing silicone oil; and the adhesive layer is prepared from a degradable adhesive. The produced packaging material belongs to a degradable product, is green and environment-friendly and has good water resistance and flexibility, the step of removing an adhesive tape is omitted when a carton using the adhesive tape is recycled, and the recycling cost of the carton is reduced.

Description

technical field [0001] The invention belongs to the technical field of degradable packaging material preparation, and in particular relates to a PLA-based degradable adhesive tape. Background technique [0002] In the prior art, most of the tapes used in daily express delivery are scotch tapes, and most of them are mainly made of polymer compounds such as polypropylene, polyvinyl chloride, and polyethylene terephthalate as substrates. These polymer materials are all It is non-degradable, and the disposal methods after use mainly include landfill and incineration, which will bring serious harm and burden to the environment. In addition, although the production cost of this type of adhesive tape is low, using such adhesive tape in large quantities will not only cause waste of resources, but also cause difficulty in recycling the packaging boxes bonded with non-degradable adhesive tape, which will increase the recycling cost. Green degradable materials are a kind of materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/30C09J189/00C09J129/04C08L67/04C08L67/02C08L3/02C08L1/02C08J5/18
CPCC09J7/255C09J7/30C09J189/00C09J129/04C08J5/18C08J2367/04C08J2467/02C08J2403/02C08J2401/02C09J2301/122C09J2467/006C08L29/04C08L89/00
Inventor 黄煜琪王召霞霍文卓
Owner ZHEJIANG GREAT SHENGDA PACKING CO LTD
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