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TOYO HEISEI POLYMER CO., LTD. specializes in manufacturing, selling and processing high quality and convenient-to-use packaging material made of synthetic resins.

Technical information

Top Page > Technical information > 1.Polyethylene, Polypropylene and THP’s Products 

Polyethylene, Polypropylene and THP’s Products

Polyethylene and polypropylene, which are two of the four most common resins, are characterized by strong price competitiveness, superior formability and physical properties. Thanks to a variety of molding processes such as film forming, blow molding, and injection molding, polyethylene and polypropylene are used to make films, sheets, composite laminates, hollow plastic parts, and molded parts. Consequently, they find extensive application in the automotive and food industry, consumer electrical appliances, pharmaceutical products, and medical care.

Toyo Heisei Polymer Co., Ltd. (hereafter called THP) manufactures films and synthetic woven fabrics from polyethylene or polypropylene utilizing a plastic molding technique.

 THP processes polyethylene and polypropylene mainly by air-cooled inflation molding. This technique has great advantages over T-die molding, which is another typical film molding technique. First, air-cooled inflation molding is useful in the production of gusseted films because it allows molten plastic to be extruded in a tubular shape. Next, this molding technique is so flexible that it is suitable for the production of small batches of different products. Also, because of its capability of low temperature forming, this molding technique greatly helps to produce additive-free products. Making the best possible use of such advantages of air-cooled inflation molding, THP develops a wide range of distinctive products.

Also, in the production of synthetic woven fabrics, THP is strict in selecting optimum raw materials and molding conditions. To begin with, THP manufactures distinctive tape products (e.g. flat yarn or split yarn), and then processes this tape into a variety of products such as woven fabrics, laminated woven fabrics and underground marking tape. Woven fabrics are formed by weaving yarns both vertically and horizontally. Laminating woven fabrics with films or coating them with resin form laminated woven fabrics. Even if more processing is added to a product, the distinctive features of the materials are maintained.

On the Technical Information page, subsequent sections give brief descriptions about the kinds of polyethylene and polypropylene, the relationship among their structures, physical properties and molding, and THP’s design and development techniques.

(Reference) Polyethylene Technology Handbook, 2001, Kogyo Chosakai Publishing Co., Ltd.


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Technical information, Other pages
1.Polyethylene, Polypropylene and THP's Products 2.Kinds of polyethylene and polypropylene
3.Structure and Physical Properties of Polyethylene and Polypropylene 4.THP's Design and Development