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
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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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