Self-adhering protecting film and application thereof in adhering protecting smooth-surfaced PC board

A technology of self-adhesive protective film and adhesive layer, which is applied in the direction of film/sheet adhesives and adhesives, which can solve the problems of difficult to tear, residual glue, and inability to tear, and achieve uniform thickness, good flexibility, easy to tear effect

Active Publication Date: 2015-04-08
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of self-adhesive protective film will change with the temperature and time. The higher the temperature, the higher the adhesion. At high temperature, it will be firmly adhered to the object and it is difficult to tear it off. In severe cases, it cannot be torn off or even residual glue

Method used

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  • Self-adhering protecting film and application thereof in adhering protecting smooth-surfaced PC board
  • Self-adhering protecting film and application thereof in adhering protecting smooth-surfaced PC board
  • Self-adhering protecting film and application thereof in adhering protecting smooth-surfaced PC board

Examples

Experimental program
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Effect test

preparation example Construction

[0051] The present invention preferably adopts the method for heating cast film to prepare self-adhesive protective film, and the preparation method of described self-adhesive protective film preferably comprises the following steps:

[0052] Melting and co-extruding the components included in the skin layer, core layer and adhesive layer;

[0053] The extruded material is cast into a film to obtain a self-adhesive protective film.

[0054] The present invention melts and co-extrudes the components included in the surface layer, core layer and adhesive layer described in the above technical solution. The present invention does not have special limitation to the equipment that described melt coextrusion adopts, adopts the equipment of melt coextrusion well-known to those skilled in the art and gets final product, as can adopt German W&H model to be 568 cast extruders to carry out melt coextrusion .

[0055] After melt co-extrusion, the present invention casts the material of ...

Embodiment 1

[0071] Adhesive layer components: MPE and SEBS with a mass ratio of 95:5, wherein the density of MPE is 0.90g / cm 3 , The melt index is 4.5g / 10min; the density of SEBS is 0.92g / cm 3 , The melt index is 8.0g / 10min.

[0072] Core layer component: PP)LDPE with a mass ratio of 60:40, where the density of PP is 0.90g / cm 3 , The melt index is 5.0g / 10min; the density of LDPE is 0.925g / cm 3 , The melt index is 4.0g / 10min.

[0073] Surface layer components: HDPE and LDPE with a mass ratio of 20:80, where the density of HDPE is 0.957g / cm 3 , The melt index is 6.0g / 10min; the density of LDPE is 0.925g / cm 3 , The melt index is 4.0g / 10min.

[0074] The German W&H model 568 casting machine is used for the heating and casting process, and the components of the adhesive layer, core layer and surface layer are prepared to obtain a self-adhesive protective film. The heating and casting process is: extruder extrusion → T Die casting→air knife→casting roll→cooling roll→β-ray thickness gauge→...

Embodiment 2

[0081] Adhesive layer components: MPE and LDPE with a mass ratio of 80:20, wherein the density of MPE is 0.90g / cm 3 , The melt index is 4.5g / 10min; the density of LDPE is 0.925g / cm 3 , The melt index is 4.0g / 10min.

[0082] The core layer component and the surface layer component are the same, HDPE and LDPE with a mass ratio of 40:60, and the density of HDPE is 0.957g / cm 3 , The melt index is 6.0g / 10min; the density of LDPE is 0.925g / cm 3 , The melt index is 4.0g / 10min.

[0083] The self-adhesive protective film was prepared according to the heating casting process and parameters in the examples.

[0084] In the present invention, the obtained self-adhesive protective film is tested for physical properties, and the results are shown in Table 2. Table 2 shows the physical property test results of the self-adhesive protective film obtained in Example 2 of the present invention.

[0085] The physical property test result of the self-adhesive protective film that table 2 embod...

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Abstract

The invention provides a self-adhering protecting film. The self-adhering protecting film comprises a surface layer, a core layer and an adhering layer, wherein the core layer is arranged between the surface layer and the adhering layer; the adhering layer is prepared from two of low-density polyethylene, an SEBS thermoplastic elastomer, metallocene polyethylene and a POE thermoplastic elastomer. According to the self-adhering protecting film, the core layer is prepared from two of low-density polyethylene, the SEBS thermoplastic elastomer, metallocene polyethylene and the POE thermoplastic elastomer, and therefore, the prepared self-adhering protecting film is relatively high in adhering force with an adhering object under the normal temperature; in addition, the adhering force has small change as temperature changes; when processing is performed at high temperature, the adhering force can be kept within a certain range, instead of excessively raising, and therefore, the self-adhering protecting film is easily torn without any adhesive residue under the high temperature state.

Description

technical field [0001] The invention relates to the technical field of substrate surface protection, in particular to a self-adhesive protective film and its application in bonding and protecting smooth PC boards. Background technique [0002] The protective film is a film used to protect the surface of vulnerable objects, and its purpose is to prevent the surface of the protected substrate from being damaged or polluted during transportation, assembly, and processing. The protective film will always be attached to the surface of the protective substrate until the product is delivered to the user before being torn off and discarded. Protective film is widely used on the surface of metal products, coated metal products, plastic products, automotive products, electronic products, and profile products to protect the surface of substrates and avoid surface damage or pollution. [0003] The protective film can be divided into adhesive type and self-adhesive type according to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J123/06C09J153/02C09J123/08C08L23/06C08L23/12
Inventor 朱文鹏李道光邵雪朱鹤东
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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