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Surface protection film

A protective film and non-crystalline technology, applied in the direction of film/sheet adhesives, synthetic resin layered products, chemical instruments and methods, etc., can solve printing defects, change the surface properties of the adherend, and be difficult to extract, etc. problem, to achieve the effect of excellent blocking resistance

Inactive Publication Date: 2010-12-08
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a conventional surface protection film, it is known that a film composed of polyvinyl chloride resin, polyethylene resin, polypropylene resin, etc. and other adhesive surface protection films, but these surface protection films have the following problems: the adhesion between the film of the base material and the adhesive agent will be poor, or due to the low cohesive force of the adhesive itself Part of the adhesive remains on the surface of the adherend when it is peeled off
In the surface protection film composed of the co-extruded laminated film provided in the aforementioned Patent Document 1 or 2, there is a problem that an extremely small amount of residue is produced on the surface of the adherend after the film is peeled off due to adhesive residue, etc., which is described above. Such secondary processing becomes the main cause of poor printing
In addition, when a styrene-based elastomer is mixed in the adhesive layer, the adhesive layer and the base layer are attached to the base material layer and difficult to extract when wound into a roll and used, and so-called blocking may occur.
[0007] In addition, in the surface protection film provided in Patent Document 3, although there is no visually recognizable contamination on the surface of the adherend after peeling, the properties of the surface of the adherend will be changed, especially after peeling. Adverse effects will be caused during secondary processing such as coating and printing

Method used

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Examples

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Embodiment

[0058] Examples and comparative examples are given below to specifically describe the present invention.

Synthetic example 1

[0060] [Synthesis of Amorphous α-Olefin Polymer (Amorphous Propylene-1-Butene Copolymer)]

[0061]In a 100L stainless steel polymerization vessel equipped with a stirrer, propylene and 1-butene were continuously copolymerized using hydrogen as a molecular weight modifier to obtain amorphous propylene-1-butene as an amorphous α-olefin polymer. Butene copolymer. Specifically, from the lower part of the polymerizer, the polymerization solvents hexane, propylene, and 1-butene were continuously supplied at a feed rate of 100 L / hour, 24.00 kg / hour, and 1.81 kg / hour, respectively, and from the upper part of the polymerizer, continuously The reaction mixture was withdrawn steadily to keep the reaction mixture in the polymerizer at 100 L. In addition, dimethylsilyl (tetramethylcyclopentadienyl) as a catalyst component was continuously supplied from the lower part of the polymerizer at feed rates of 0.005 g / hour, 0.298 g / hour, and 2.315 g / hour, respectively. (3-tert-butyl-5-methyl-2-p...

Synthetic example 2

[0063] [Synthesis of Amorphous α-Olefin Polymer (Amorphous Propylene-Ethylene-1-Butene Copolymer)]

[0064] A 2 L detachable flask reactor equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser was decompressed and replaced with nitrogen, and then 1 L of dry toluene was introduced as a polymerization solvent. At this time, under normal pressure, 2×10 -6 cm 3 / min, 4×10 -6 cm 3 / min, 1×10 -6 cm 3 Ethylene, propylene and 1-butene were continuously fed at a feed rate of 1 / min, and the solvent temperature was controlled at 30°C. After adding 0.75 mmol triisobutylaluminum (hereinafter referred to as TIBA) to the polymerization tank, add 0.0015 mmol dimethylsilyl (tetramethylcyclopentadienyl) (3-tert-butyl- 5-methyl-2-phenoxy)titanium dichloride. After 15 seconds, 0.0075 mmol of triphenylmethyltetrakis(pentafluorophenyl) borate was added to the polymerization tank, and polymerization was carried out for 10 minutes. As a result, an amorphous propyle...

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Abstract

The invention relates to a surface protection film which is to be applied to the surfaces of building materials, various resin plates for use in electrical and electronic fields, glass plates, metal plates and so on for the purpose of protecting the adherends from scratching, contamination or the like in storage, transportation, or post-processing. A surface protection film which little stains the surface of an adherend and is excellent in fabricability is provided by using, as the main resin component constituting the pressure-sensitive adhesive layer of the film, a resin blend which comprises an amorphous a-olefin polymer and a linear low-density polyethylene at a specific ratio or which comprises an amorphous a-olefin polymer, a linear low-density polyethylene, and a crystalline ethylene / a-olefin copolymer at a specific ratio.

Description

technical field [0001] The present invention relates to a protective film that is pasted on the surface of various resin plates, glass plates, metal plates, etc. Protect the adherend from damage, pollution, etc. during processing. In particular, it relates to a surface protection film that does not float or peel off from an adherend after it is pasted on the adherend, and that has very little contamination of the surface of the adherend, such as residual glue, after the film is peeled off. Background technique [0002] As the basic performance requirements for the surface protection film, it can be listed that the above-mentioned various adherends can be neatly pasted without wrinkles or air; it has excellent sticking workability; it has no floating during storage, transportation, etc. Moderate adhesive force that can be lifted or peeled off; the adhesive force caused by environmental changes in the storage of the adherend or post-processing changes with time is small, easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32C09J7/20
CPCB32B27/32C09J2423/00C09J2423/04C09J123/0815C09J7/20C08L23/0815C08L23/14C08L23/142
Inventor 薄井达彦森谷贵史小桥一范
Owner DIC CORP
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