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Easy-to-unwind self-adhesive protection film and preparation method thereof

A technology of self-adhesive protective film and protective film, which is applied in the direction of adhesive, adhesive type, film/sheet adhesive, etc. Pollution, film stretching deformation and other problems, to achieve excellent water and oxygen barriers, to solve pollution or residue, and the effect of large property differences

Active Publication Date: 2020-11-13
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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  • Easy-to-unwind self-adhesive protection film and preparation method thereof
  • Easy-to-unwind self-adhesive protection film and preparation method thereof
  • Easy-to-unwind self-adhesive protection film and preparation method thereof

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Embodiment 1

[0043] 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.

[0044] Table 1:

[0045]

[0046]

[0047] The preparation method of present embodiment protective film is:

[0048] 1) The preparation of the modified polyolefin material is as follows: weigh the above-mentioned components according to the weight part, mix them evenly in a high-speed mixing pot, put them into a twin-screw extruder for melt extrusion and granulation, and obtain the 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.

[0049] 2) The materials of each layer are mixed evenly and then added to the three-layer co-extrusion...

Embodiment 2

[0051] 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:

[0052] Table 2:

[0053]

[0054]

[0055] The preparation method of present embodiment protective film is:

[0056] 1) The preparation of the modified polyolefin material is as follows: weigh the above-mentioned components according to the weight part, mix them evenly in a high-speed mixing pot, put them into a twin-screw extruder for melt extrusion and granulation, and obtain the 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.

[0057] 2) The materials of each layer are mixed evenly and then added to the three-layer co-extrusion blown film equipment....

Embodiment 3

[0059] 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:

[0060] table 3:

[0061]

[0062] The preparation method of present embodiment protective film is:

[0063] 1) The preparation of the modified polyolefin material is as follows: weigh the above-mentioned components according to the weight part, mix them evenly in a high-speed mixing pot, put them into a twin-screw extruder for melt extrusion and granulation, and obtain the 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.

[0064] 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 ...

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Abstract

The invention provides an easy-to-unwind co-extrusion self-adhesive protection film which is of a three-layer structure and sequentially comprises a self-adhesive layer, a connecting layer and a supporting layer, and the thickness ratio of the self-adhesive layer to the connecting layer to the supporting layer is 8-35: 5-15: 50-87. The self-adhesive layer is made of a thermoplastic modified polyvinyl alcohol material; the connecting layer comprises a maleic anhydride modified polyolefin bonding resin material; and the supporting layer is made of a modified polyolefin material. According to theinvention, a strong intermolecular force is formed between polar functional groups on thermoplastic modified polyvinyl alcohol and the surface of the connecting layer material, so that the protectionfilm has strong pressure-sensitive self-adhesion and stable viscosity, tackifying resin does not need to be added, and a release agent or a separant does not need to be used or an independent releaselayer does not need to be arranged. The problems that the protection film is not easy to unwind or the unwinding force is too high after being wound, the film is easy to stretch and deform or inconvenient to use when the protection film is used, the tackifying resin is easy to migrate to the surface along with time extension or temperature rise, and the surface of a protected object is polluted or remained are generally solved.

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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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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