Polyolefin film

A polyolefin, film-based technology, applied in the direction of hydrocarbon copolymer adhesives, film/sheet-like adhesives, adhesive types, etc., can solve the problem of difficult to cause film elongation or deformation, achieve inhibition The effect of excellent adhesion, processability, and good film-forming properties

Inactive Publication Date: 2016-01-13
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The problem to be solved by the present invention is to provide a self-adhesive surface protection film with excellent film processing adaptability, which shows strong adhesive force to the covered body and can be used for various covered bodies, and can be used even in a rolled state. It is difficult to cause problems such as partial elongation or deformation of the film when storing the adhesive film and pulling out the film later

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (Preparation of substrate layer)

[0087] 100 wt% of a homopolypropylene resin (manufactured by Sumitomo Chemical: FLX80E4, MFR: 7.5 g / 10 minutes) was melt-extruded at 240° C. with a 120 mmφ single-screw extruder to form a substrate layer.

[0088] (Preparation of adhesive layer)

[0089] Styrene-based elastomer (manufactured by Asahi Kasei Chemicals: TAFTEC (registered trademark) H1221, styrene copolymerization ratio: 12 wt%, MFR: 4.5 g / 10 minutes) 85 wt%, homopolypropylene resin (manufactured by Sumitomo Chemical: FS2011DG3, MFR: 2.5 g / 10 minutes) 7.5 wt% and petroleum resin (Arkon (registered trademark) P125) 7.5 wt% were melt-extruded at 220° C. with a 90 mmφ single-screw extruder to form an adhesive layer.

[0090] (production of release layer)

[0091] Homopolypropylene resin (manufactured by Sumitomo Chemical: FLX80E4, MFR: 7.5g / 10min) 62wt%, low-density polyethylene resin (manufactured by Ube: R300) 30wt% and polymethylpentene (manufactured by Mitsui Chemicals...

Embodiment 2

[0095] The pressure-sensitive adhesive layer and the base material layer were kept the same as in Example 1, and the release layer was changed to the following, and three types of three-layer unstretched films were obtained by the same manufacturing method as in Example 1.

[0096] (production of release layer)

[0097] Propylene-ethylene block copolymer (manufactured by Japan Polypropylene Corporation: BC3HF) 56wt%, low-density polyethylene resin (Ube Industries: R300) 20wt%, and polymethylpentene (Mitsui Chemicals: RT31) 24wt%, with 90mmφ A single-screw extruder was used for melt extrusion at 250° C. to form a release layer.

Embodiment 3

[0099] The substrate layer was kept the same as in Example 1, and the adhesive layer and the release layer were changed to the following, and three types of three-layer unstretched films were obtained by the same manufacturing method as in Example 1.

[0100] (Preparation of adhesive layer)

[0101] Styrenic elastomer (manufactured by Asahi Kasei Chemicals: TAFTEC (registered trademark) H1221, styrene copolymerization ratio: 12 wt%, MFR: 4.5 g / 10 minutes), petroleum resin (manufactured by Arakawa Chemical Industry: Arkon (registered trademark) P125) and homogeneous Polypropylene resin (manufactured by Sumitomo Chemical: FS2011DG3, MFR: 2.5g / 10min) was mixed at a ratio of 80 / 7.5 / 12.5wt%, and melt-extruded at 220°C with a 90mmφ single-screw extruder to produce adhesive layer.

[0102](production of release layer)

[0103] Propylene-ethylene block copolymer (manufactured by Japan Polypropylene Corporation: BC3HF) 72wt%, low-density polyethylene resin (Ube Industries: R300) 20wt...

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Abstract

The present invention addresses the problem of obtaining a self-adhesive surface-protecting film that is highly processing-friendly, and despite adhering to the protected object strongly and being usable on a variety of objects, is not prone to problems such as localized stretching or deformation when unrolled from being stored rolled up. The present invention relates to a polyolefin film characterized by comprising an adhesive layer laminated to one surface of a polypropylene-resin base layer and a release layer laminated to the opposite surface via co-extrusion. This polyolefin film is further characterized in that: the resins constituting the adhesive layer include, at least, a styrene elastomer (consisting primarily of: a block copolymer consisting of styrene-polymer blocks and olefin-polymer blocks; a block copolymer consisting of styrene-polymer blocks and styrene / olefin random-copolymer blocks; and / or hydrogenated versions thereof) and a polyolefin resin; said polyolefin resin constitutes 5-25% of the total weight of the resin components constituting the adhesive layer; the resins constituting the release layer include, at least, a polypropylene resin and a C4+ alpha-olefin (co)polymer; and said C4+ alpha-olefin (co)polymer constitutes at least 5% but less than 25% of the total weight of the resin components constituting the release layer.

Description

technical field [0001] The present invention relates to a polyolefin-based film. The polyolefin-based film of the present invention can be used for components such as prism sheets used in optical applications, synthetic resin plates (for example, for building materials), stainless steel plates (for example, for building materials), aluminum plates, decorative plywood, steel plates, glass plates, Home appliances, precision machinery, etc. In addition, the above-mentioned polyolefin-based film can be suitably used for protecting the surface of an automobile body during manufacture, for protecting articles from damage during stacking, storage, transportation, or handling during the manufacturing process, and for protecting articles in the second place. Protects against damage during secondary operations such as bending or pressing. Background technique [0002] Adhesive films for the purpose of protecting the surface of the covered body have been used in the processing, stora...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02B32B27/00B32B27/30C09J125/04C09J153/00C09K3/00
Inventor 山本茂知大木祐和多贺敦
Owner TOYOBO CO LTD
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