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Adhesive layer composition, self-adhesive film and application of self-adhesive film

A technology of adhesive layer and composition, applied in the direction of adhesive type, hydrocarbon copolymer adhesive, film/sheet adhesive, etc., can solve the problem of good processability, low self-adhesive strength, crystal point Many problems, to achieve the effect of good processing performance

Inactive Publication Date: 2020-12-25
GUANGDONG DONGLI NEW MATERIALS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the adhesive force of the adhesive layer, as the resin, a styrene-based elastomer or the like exhibiting high adhesive force can be used as the main component, but if the adhesive force of the adhesive layer is improved, the film in a roll state When the film is stored and then sent out, problems such as sticking, local elongation, or deformation of the film occur, or polyethylene resin is used, and metallocene polyethylene material is used alone, which has low cost, good processability, and low self-adhesive strength , less than 20 grams
If the tackifying material is added in order to improve the self-adhesive strength, it is easy to cause interfering factors such as precipitation, such as CN109535534A; It is a method to improve the adhesion of the protective film, but there will be problems of low self-adhesive strength and many crystal points, and the patch will be precipitated at the same time, so it cannot be applied to the application of co-extruded self-adhesive protective film in high-end products.

Method used

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  • Adhesive layer composition, self-adhesive film and application of self-adhesive film
  • Adhesive layer composition, self-adhesive film and application of self-adhesive film
  • Adhesive layer composition, self-adhesive film and application of self-adhesive film

Examples

Experimental program
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Effect test

preparation example Construction

[0041] The preparation method of the self-adhesive protective film is as follows: use a three-layer co-extrusion blown film machine to process, add 15kg of adhesive layer composition to the outer layer hopper, add 50kg LDPE 2420H to the middle layer hopper, add 20kg 2420H to the inner layer; each screw The processing temperature is 185-200°C, the rotation speed is 250RPM for the outer layer, 350RPM for the middle layer, and 350RPM for the inner layer. It is extruded by a three-layer co-extrusion blown film machine, co-extruded from the outer, middle and inner layers and blown up through the die head. The thickness is 50um The tube film is cut and rolled separately to obtain the corresponding self-adhesive film.

[0042] Wherein, the preparation method of the adhesive layer composition is: mixing the styrene-based polymer and the propylene-based elastomer according to the ratio at high speed, and then adding them into the twin-screw extruder from the main feeding port, and separ...

Embodiment 1

[0050] Compared with Example 5, Example 1 changed the hard segment content in the styrenic block copolymer, and when the styrenic block copolymer with high soft segment content was replaced with the styrenic block copolymer with medium soft segment content, Due to the large difference in viscosity of the two-phase system accompanied by a large number of hard segment chain structures, the dispersion effect of the two phases is poor, and the self-adhesive strength of the composition is very weak, only 0.9N.

[0051] Compared with Example 6, when the propylene-based elastomer is removed, the two-phase dispersion effect is poor because the two-phase system lacks the propylene-based elastomer acting as a bridge, and the self-adhesive strength of the composition is very weak, only 0.6N , and the processability is poor, and the film has crystal points.

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Abstract

The invention relates to the technical field related to self-adhesive films, and particularly provides an adhesive layer composition, a self-adhesive film and application thereof. A first aspect of the present invention provides an adhesive layer composition comprising a polyethylene-based resin, a styrene-based polymer, and a propylene-based elastomer; the polyethylene resin is a polymer of an ethylene oligomer and a higher olefin; the ethylene oligomer is obtained by catalyzing metallocene; the higher olefin is higher olefin of C5-C30; and the styrene polymer is a styrene block copolymer. The adhesive layer composition provided by the invention has good compatibility, the problems of crystal points or precipitation and residues are avoided, and meanwhile, the prepared protective film hasgood transparency, so that the protective film has good application potential in various fields.

Description

technical field [0001] The present invention relates to the technical field related to self-adhesive films, and more specifically, the present invention provides an adhesive layer composition, self-adhesive films and applications thereof. Background technique [0002] In the field of films, adhesive films for the purpose of protecting the surface of coverings are used in the processing, storage, and transportation of building materials, electrical, electronic products, and automobiles. Such adhesive films must have good adhesion and It can be easily peeled off after use without contaminating the surfaces with adhesive. [0003] In order to improve the adhesive force of the adhesive layer, as the resin, a styrene-based elastomer or the like exhibiting high adhesive force can be used as the main component, but if the adhesive force of the adhesive layer is improved, the film in a roll state When the film is stored and then sent out, problems such as sticking, local elongation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/30C09J125/04C09J123/10
CPCC09J7/29C09J7/30C09J125/04C09J2423/046C09J2423/10C09J2425/00C08L23/10
Inventor 关启锐刘建强唐承明施信波
Owner GUANGDONG DONGLI NEW MATERIALS SCI & TECH CO LTD