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A kind of easy unwinding self-adhesive protective film and preparation method thereof

A self-adhesive protective film, protective film technology, applied in the direction of adhesive, adhesive type, film/sheet adhesive, etc. Pollution, film stretching and deformation use, etc., to achieve the effects of excellent water and oxygen insulation, good protection, and large differences in properties

Active Publication Date: 2022-04-29
佛山(华南)新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose an easy-to-unroll self-adhesive protective film and its preparation method to solve the problem that the protective film is difficult to unwind after being rolled or the unwinding force is too high, and it is easy to cause stretching deformation of the film or It is inconvenient to use and the tackifying resin is easy to migrate to the surface with time or temperature rise, causing the problem of contamination or residue on the surface of the protected object

Method used

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  • A kind of easy unwinding self-adhesive protective film and preparation method thereof
  • A kind of easy unwinding self-adhesive protective film and preparation method thereof
  • A kind of easy unwinding self-adhesive protective film and preparation method thereof

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Embodiment 1

[0042] This embodiment provides an easy-to-unwind co-extrusion self-adhesive protective film, which is composed of the following three-layer structure in order, and the specific components are shown in Table 1.

[0043] Table 1:

[0044]

[0045] The preparation method of present embodiment protective film is:

[0046] 1) The preparation of the modified polyolefin material is as follows: weigh the above-mentioned ingredients according to the weight part, mix them uniformly in a high-speed mixing pot, put them into a twin-screw extruder to melt and extrude to obtain a modified polyolefin material for the support layer. and the working parameters of the twin-screw are: twin-screw length-to-diameter ratio of 28:1–65:1, screw diameter of 35mm, temperature of 130°C, screw speed of 500rpm / min; modified polyolefin The melt flow rate was 3.5 g / 10 min.

[0047] 2) The materials of each layer are mixed evenly and then added to the three-layer co-extrusion blown film equipment. The...

Embodiment 2

[0049] This embodiment provides an easy-to-unwind co-extruded self-adhesive protective film, which is composed of the following three-layer structures in order, as shown in Table 2 below:

[0050] Table 2:

[0051]

[0052] The preparation method of present embodiment protective film is:

[0053] 1) The preparation of the modified polyolefin material is as follows: weigh the above-mentioned ingredients according to the weight part, mix them uniformly in a high-speed mixing pot, put them into a twin-screw extruder to melt and extrude to obtain a modified polyolefin material for the support layer. and the working parameters of the twin-screw are: twin-screw length-to-diameter ratio of 28:1–65:1, screw diameter of 65mm, temperature of 180°C, screw speed of 300rpm / min; modified polyolefin The melt flow rate was 12.8 g / 10 min.

[0054] 2) The materials of each layer are mixed evenly and then added to the three-layer co-extrusion blown film equipment. The thickness ratio is se...

Embodiment 3

[0056] This embodiment provides an easy-to-unwind co-extruded self-adhesive protective film, which is composed of the following three-layer structures in order, as shown in Table 3 below:

[0057] table 3:

[0058]

[0059] The preparation method of present embodiment protective film is:

[0060] 1) The preparation of the modified polyolefin material is as follows: weigh the above-mentioned ingredients according to the weight part, mix them uniformly in a high-speed mixing pot, put them into a twin-screw extruder to melt and extrude to obtain a modified polyolefin material for the support layer. and the working parameters of the twin-screw are: the aspect ratio of the twin-screw is 28:1-65:1, the screw diameter is 75mm, the temperature is 250°C, and the screw speed is 300rpm / min; the melt flow rate is 10g / 10min.

[0061] 2) Stir the materials of each layer evenly and add them to the three-layer co-extrusion blown film equipment. The thickness ratio of the three layers is...

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Abstract

The invention provides an easy-to-unwind co-extruded self-adhesive protective film. The protective film has a three-layer structure, which is a self-adhesive layer, a connection layer and a support layer in sequence, and the self-adhesive layer, the connection layer and the support layer The thickness ratio is 8‑35:5‑15:50‑87; the self-adhesive layer is a thermoplastic modified polyvinyl alcohol material; the connection layer includes an adhesive resin material of maleic anhydride modified polyolefin; the support layer is a modified polyvinyl alcohol material; Olefin materials. In the present invention, a strong intermolecular force is formed between the polar functional group on the thermoplastically modified polyvinyl alcohol and the surface of the connecting layer material, so that the protective film has strong pressure-sensitive self-adhesiveness and stable viscosity without adding tackifying resin. There is also no need to use a release or release agent or to provide a separate release layer. In general, it solves the problems that the protective film is difficult to unwind or the unwinding force is too high, which may easily cause the film to be stretched and deformed or inconvenient to use, and the tackifying resin will easily migrate to the surface with time or temperature rise, resulting in being Protect the surface of objects with pollution or residue problems.

Description

technical field [0001] The invention relates to a modified polymer functional film material, in particular to an easy-unrolling self-adhesive protective film and a preparation method thereof. Background technique [0002] The protective film is a polymer functional film material with a protective effect. It is attached to the surface of metals, ceramics, plastics, precision electronic devices, etc., and plays a temporary protective role during the storage, transfer, and processing of the above items. Avoid surface damage or contamination. The protective film is a pressure-sensitive adhesive product, which requires a certain degree of self-adhesiveness to various substrates, but the adhesive force should not be too high. At present, there are two main preparation methods for self-adhesive protective film: coating method and co-extrusion method. The coating method is to coat a pressure-sensitive adhesive on a polymer film such as polyethylene, polypropylene or polyester. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/29C09J7/30C09J129/04C08L23/08C08L51/06C08L23/06C08L23/14C08L23/16C08L23/12C08J5/18
CPCC09J7/29C09J7/30C08J5/18C09J129/04C08J2323/08C08J2451/06C08J2423/06C08J2423/14C08J2423/08C08J2351/06C08J2323/16C08J2423/12C09J2429/00C09J2423/046C08L2205/025C09J2451/006C08L29/04
Inventor 刘耀春刘嘉贤圣桂金李爽樊小军
Owner 佛山(华南)新材料研究院
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