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A tape and box sealing technology, applied in the directions of adhesives, packaging sealing/fastening, packaging, etc., can solve the problems of increasing recycling costs, difficulty in recycling packaging boxes, environmental pollution of tapes, etc. The effect of environmental protection requirements
Inactive Publication Date: 2020-07-14
广东洪运洋科技有限公司
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Problems solved by technology
[0003] Among them, most of the tapes that need to be consumed in express packaging are non-degradable tapes. On
Method used
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Embodiment 1
[0032] This embodiment provides a kind of degradable sealing tape, and its preparation method is:
[0033] S1. Extrude the ethylene-vinyl acetate copolymer into a film by hot pressing to obtain the first substrate layer.
[0034] S2. After the protein is heated and modified, it is extruded by hot pressing to form a film to obtain a second substrate layer.
[0035] S3. Prepare the adhesive layer, the adhesive layer is composed of the following parts by weight: 30-60 parts of starch, 2-5 parts of modifier, 5-10 parts of thickener, 5-10 parts of cross-linking agent, pH regulator 2-5 parts, 2-5 parts of adhesive, 1-3 parts of preservative, 2-4 parts of oxidizing agent and 1-2 parts of defoamer.
[0036] Among them, the starch is processed under high temperature and high pressure to improve its solubility. Modifiers are acid anhydrides such as maleic anhydride and succinic anhydride that undergo esterification reactions with starch. The thickener is sodium bentonite, the crossli...
Embodiment 2
[0045]This embodiment provides a kind of degradable sealing tape, which is different from Embodiment 1 in that:
[0046] S1. Extrude the ethylene-ketene copolymer into a film by hot pressing to obtain the first substrate layer.
[0047] The rest are the same as in Embodiment 1, and will not be repeated here.
Embodiment 3
[0049] This embodiment provides a kind of degradable sealing tape, which is different from Embodiment 1 in that:
[0050] S2. After modifying the cellulose and starch, extrude the cellulose and starch to form a film by hot pressing to obtain the second substrate layer.
[0051] The rest are the same as in Embodiment 1, and will not be repeated here.
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Abstract
The invention belongs to the technical field of packaging, in particular relates to a degradable box sealing adhesive tape. The degradable box sealing adhesive tape comprises a first base material layer, a second base material layer, a bonding layer and a release layer which are sequentially stacked from top to bottom, the first base material layer comprises a photosensitive group modified high-molecular polymer, the second base material layer comprises a modified natural high-molecular polymer, the bonding layer comprises starch subjected to hydrophobic oxidation treatment, and the release layer is a polyester film subjected to surface low-energy treatment. According to the invention, the high-molecular polymer is modified by the photosensitive group in the first base material layer, so that the box sealing adhesive tape can be biodegraded, can also be photodegraded, can be photodegraded in the presence of light, accelerates the degradation efficiency, and can be biodegraded in the absence of light after being buried in soil. The bonding layer is subjected to hydrophobic oxidation treatment, starch is hydrophilic, so that colloid is easy to strip and degrade in a water environment, and the starch is modified by an oxidative hydrophobic method, so that the hydrophobic property of the colloid can be improved, and the degradation efficiency is better.
Description
technical field [0001] The invention belongs to the technical field of packaging and encapsulation, in particular to a degradable sealing tape. Background technique [0002] Adhesive tape is composed of base material and adhesive, and two or more unconnected objects are connected together by bonding. Adhesive tape has a wide range of uses, beautiful and simple, and convenient mechanical operation. It has a wide range of uses and a large amount of use. Especially with the development of e-commerce, the amount of adhesive tape in the express delivery industry is gradually increasing. [0003] Among them, most of the tapes that need to be consumed in express packaging are non-degradable tapes. On the one hand, the use of non-degradable tapes will cause serious environmental pollution, and on the other hand, it will also cause difficulties in the recycling of packaging boxes with non-degradable tapes. Increase recovery costs. Contents of the invention [0004] The purpose o...
Claims
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