JP2582005Y2 - Cutter mat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter mat.

[0002]

2. Description of the Related Art In recent years, cutter mats made of an olefin resin have been found to improve the problems of the conventional vinyl chloride resin products, such as the generation of toxic gas during incineration or distortion caused by transfer of a plasticizer. .

[0003]

However, in the case of conventional olefin-based resins, heat-resistant and abrasion-resistant materials are used because resins having low melting points such as EMMA (ethylene methyl methacrylate) and EEA (ethylene ethyl acrylate) are used. Was inferior.

[0004] The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object the object of being superior in heat resistance and abrasion resistance as compared with an olefin resin cutter mat. It is to provide a cutter mat made of polypropylene.

[0005]

Means for Solving the Problems A technical means achieved by the present invention to achieve the above-mentioned object is that it comprises polypropylene and hydrogenated SBR (HSBR).

Further, a surface sheet layer made of polypropylene and hydrogenated SBR is provided on the outer surface or both the inner and outer surfaces of the hard sheet layer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the polypropylene cutter mat of the present invention will be described below with reference to FIGS.

First, in the cutter mat made of polypropylene of the present invention shown by A in FIG. 1, a resin composition obtained by adding a desired amount of hydrogenated SBR (HSBR) to polypropylene (PP) is extruded to a desired thickness. Is formed. The thickness, shape, and the like of the cutter mat A of the present invention are arbitrary, and are not limited to any of transparent, translucent, and opaque.

The polypropylene is not particularly limited, but a random polymer, a homopolymer, or the like is preferable for forming a cutter mat having excellent transparency. Also, from the viewpoint of dispersion, its MI (melt index)
Is preferably 0.5 to 5 (according to JIS K6758).

[0010] The ratio of polypropylene to hydrogenated SBR is 40-60: 60-40. As the hydrogenated SBR, any of a block polymerization type and a random polymerization type may be used. The random polymerization type is excellent in transparency, for example, DINARON 1320P, 1910
P (manufactured by Nippon Synthetic Rubber Co., Ltd.) or the like is used. If the amount of polypropylene is more than 60, it will be hard and damage the cutting edge.
If it is less than 0, heat resistance and abrasion resistance are inferior.

In addition, the cutter mat A of the present invention may optionally contain conventionally known additives such as an antistatic agent and a coloring agent, if necessary.

Next, the cutter mat A 'shown in FIG. 2 will be described. The cutter mat A' has a surface sheet layer 2 made of polypropylene and hydrogenated SBR on both inner and outer surfaces 1a and 1b of the hard sheet layer 1. The hard sheet layer 1 is made of a synthetic resin such as polypropylene (P) extruded and supplied into a sheet having a desired thickness.
P) is subjected to sheeting by extrusion, as is well known in the art, and then cooled and solidified to form a sheet having a desired thickness.

The hard sheet layer 1 is not limited to the above-mentioned polypropylene as long as it is hard and has good adhesiveness to the surface sheet layers 2 and 2. For example, the hard sheet layer 1 is made of polystyrene, ABS or the like. It may be optional. Further, the topsheet 2 having the above configuration may be either the inner surface 1a or the outer surface 1b, and can be changed as appropriate.

On the other hand, the surface sheet layer 2 has the same configuration as the cutter mat A shown in FIG. 1, and a description thereof will be omitted.

The cutter mat A 'may be formed by separately forming the hard sheet layer 1 and the surface sheet layers 2 and 2 and then integrating them, or by rolling the hard sheet layer 1 and rolling the surface sheet layers 2 and 2 on each other. May be any of those laminated and integrated.

Here, a specific example will be described. A hydrogenated SBR is added to polypropylene (homopolymer, MI 2.2), and the blend is formed on a cutter mat A having a desired thickness by a T-die, Sheet layer (PP) 1
The inner and outer surface 1a, in 1b, polypropylene (homopolymer, MI 2.2) heat resistance formed by laminating a surface sheet layers 2 and 2 obtained by adding the hydrogenated SBR those, abrasion resistance Contact
And protection of the cutting edge are made of only polypropylene ( Homo PP) or olefin resin (EMMA, E
EA) and the results are shown in Table 1 below.

[0017]

[Table 1]

[0018]

[Effects of the Invention] Since the present invention has a structure composed of polypropylene and hydrogenated SBR, it has problems such as generation of toxic gas at the time of incineration or distortion due to transfer of a plasticizer as in a conventional cutter mat made of vinyl chloride resin. And a novel polypropylene-made cutter mat excellent in heat resistance and abrasion resistance can be provided.

In addition, if a cutter mat made of polypropylene is provided with a surface sheet layer made of polypropylene and hydrogenated SBR on the outer surface or on both inner and outer surfaces of the hard sheet layer, the hard sheet layer can be further protected in addition to the above effects. Formability is imparted and the usability is excellent.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing one embodiment of a cutter mat made of polypropylene of the present invention.

FIG. 2 is a longitudinal sectional front view showing another embodiment.

[Explanation of symbols]

 A, A ': Polypropylene cutter mat 1: Hard sheet layer 2: Surface sheet layer

Continuation of the front page (56) References JP-A-2-158643 (JP, A) JP-A-6-299012 (JP, A) JP-A-4-345840 (JP, A) JP-A-4-3441839 (JP) , A) Japanese Utility Model Application Hei 7-18894 (JP, U) Japanese Utility Model Application Hei 6-6-31996 (JP, U) Japanese Patent Publication No. 57-32680 (JP, B2) (58) Fields surveyed (Int. Cl. ⁶ , DB) Name) B26D 7/20 B32B 25/14 B32B 27/32 B43L 3/00

Claims (2)

(57) [Scope of request for utility model registration] 1. A cutter mat comprising polypropylene and hydrogenated SBR. 2. A cutter mat comprising a hard sheet layer and a surface sheet layer made of polypropylene and hydrogenated SBR provided on the outer surface or both the inner and outer surfaces.