Adhesive base material, adhesive tape with same and preparation method

A technology for tapes and substrates, applied in the direction of adhesives, film/sheet adhesives, adhesive types, etc., can solve the problems of non-degradability and poor moisture permeability of tapes, and achieve the effect of reducing pollution

Inactive Publication Date: 2021-02-19
北京众邦健业印刷有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of adhesive tape base material, adhesive tape with it and preparation method, to solve the problem of non-degradable and poor moisture permeability of adhesive tape in the prior art

Method used

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  • Adhesive base material, adhesive tape with same and preparation method
  • Adhesive base material, adhesive tape with same and preparation method
  • Adhesive base material, adhesive tape with same and preparation method

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preparation example Construction

[0041] According to another aspect of the present application, there is also provided a method for preparing the above adhesive tape, which includes the following steps: S1, melt blending and film-forming the first raw material including L-polylactic acid, toughening filler and dispersant, to obtain Adhesive tape substrate; S2, coating the second raw material including peach gum and poly-N-vinylpyrrolidone on the surface of the substrate layer and drying to obtain an adhesive layer covering the surface of the adhesive tape substrate.

[0042] In a preferred embodiment, the above step S1 includes the following steps: S11, using a twin-screw extruder to melt and blend the first raw materials to obtain a modified blend; S12, using a casting process to blend the modified The material is extruded and cast into a film, and then cooled to obtain a tape substrate.

[0043] In the above-mentioned preferred embodiment, more preferably, the length-to-diameter ratio of the screw in the ab...

Embodiment 1

[0052] The preparation method of the adhesive tape provided in the present embodiment comprises the following steps:

[0053] (1) Preparation of nano-silica / polyoxyethylene composition: 100 parts by weight concentration of 5% polyethylene oxide and 24.6 parts by weight concentration of 30% sodium silicate aqueous solution are mixed in a three-necked flask, heated to 40 -45°C, add 10% sulfuric acid solution dropwise to PH = 6-6.5, then raise the temperature to 80-90°C and keep it warm for 30 minutes, after cooling, centrifuge, pour off the supernatant, and continue to wash the lower suspension with distilled water until no Sulfate ion, the lower layer after centrifugation was vacuum-dried at 80°C for 2h.

[0054] (2) After mechanically blending 60 parts of poly-L-lactic acid and 4 parts of nano-silica / polyethylene oxide composition (containing 2 parts of nano-silica and 2 parts of polyethylene oxide), a twin-screw extruder is used to The three raw materials are melt blended, t...

Embodiment 2

[0059] The difference between the preparation method of the adhesive tape provided in this embodiment and embodiment 1 is:

[0060] In step (3), the raw materials for melt blending include 55 parts of poly-L-lactic acid, 0.25 parts of nano silicon dioxide, and 0.25 parts of polyethylene oxide.

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Abstract

The invention provides an adhesive tape base material, an adhesive tape having the same and a preparation method. The tape base material includes a continuous phase and a dispersed phase dispersed in the continuous phase, the material of the continuous phase is L-polylactic acid, and the material of the dispersed phase is a toughening filler and a dispersant, wherein by weight, the L-polylactic acid is 55 to 95 parts, 0.25 to 2.5 parts of toughening filler, and 0.25 to 2.5 parts of dispersant. Since raw materials such as L-polylactic acid are biodegradable, the environmental pollution caused by the tape with this substrate is reduced, and by limiting the ratio of the above components, the tape substrate can have a moderate oxygen transmission rate As well as high water vapor transmission rate, it can be used to realize the encapsulation of agricultural products.

Description

technical field [0001] The invention relates to the field of adhesive tape preparation, in particular to an adhesive tape base material, an adhesive tape with the same and a preparation method. Background technique [0002] With the development of the commodity economy, the improvement of people's living standards, and the acceleration of the pace of life, online shopping has become the main way for people to purchase daily necessities, and logistics has also become the first choice for companies to purchase raw materials and deliver products to users. With the increasing use of commodity packaging, the demand for sealing tape is also increasing. [0003] At present, in the domestic market, the base materials of sealing tapes are mainly polyvinyl chloride, polypropylene and other materials. Their degradation process takes hundreds of years, and the degradation process of the adhesive layer is also very long. The environment brings a lot of pollution. In order to solve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04
CPCC08K2201/011C08L67/04C08L2201/06C08L2205/03C08L2205/035C09J11/08C09J193/00C09J2467/006C09J7/255C09J7/38C09J2301/122C08L71/02C08K3/36C08L39/06
Inventor 李东立李伯涵陈素梅朱磊
Owner 北京众邦健业印刷有限责任公司
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