Examples of the Thermoplastic Resin Are > 자유게시판

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

Since the polyphenylene sulfide is usually poor in elongation and flexibility as it is, it's preferable to use a polyphenylene sulfide containing 5 to 40% by weight of an elastomer. It is preferable that the elastomer has an capacity to be modified so that a softened polyphenylene sulfide, which is ready by mixing with the elastomer and kneading them with melting, has a flexural modulus of at most 30000 (ASTM D 790) and a tensile elongation at break of at the very least 5% (ASTM D 638). Representative examples of such an elastomer are, as an example, an olefin copolymer containing an epoxy group (ethylene content: 88% by weight, glycidyl methacrylate content: 12% y weight), a hydrogenated styrenebutadience copolymer (TUFTEC M 1913 commercially out there from Asahi Chemical Industry Co., Ltd.), an ethylene-propylene copolymer (TAFMER PO 680 commercially available from MITSUI PETRO CHEMICAL INDUSTRIES, LTD.), and the like. Because the polyphenylene sulfide which may be employed within the electrostatic coating method of powder, both of the linear polyphenylene sulfide and the crosslinked polyphenylene sulfide can be utilized, and if a skinny film having a thickness of at most 0.1 mm might be formed, there is no necessity so as to add an elastomer thereto. The tetrafluoroethylene perfluoroalkylvinyl ether copolymer and the tetrafluoroethylenepentafluoroproylene copolymer will be employed in an extrusion molding by heating to melt.

Accordingly, it's preferable that the melt index is not less than 0.1 g/10 minutes. Accordingly, it is preferable that the melt index is 0.5 to 5 g/10 minutes. The smaller the melt index of the polybutylene terephthalate is, the better the durability corresponding to abrasion resistance and stress-cracking resistance is, but it tends to be troublesome for finishing up the extrusion molding. When the melt index of the excessive density polyethylene is less than 0.01 g/10 minutes, the extrusion molding becomes troublesome, and there is a tendency that the interior coat cannot be mounted on a stranded steel wire. When the melt index is more than 5 g/10 minutes, there is a tendency that oil resistance, stress cracking resistance and abrasion resistance deteriorate. When the melt index is greater than 5 g/10 minutes, there's a tendency that bending energy, impression resistance and abrasion resistance deteriorate. Accordingly, it is preferable that the melt index is at most 5 g/10 minutes. Also, when the melt index is too large, the polybutylene terephthalate lacks toughness and cracks are generated within the internal coat, and the liner is often damaged when the internal coat is quickly bent in the assembling process of a management cable.

The variety of the strands used in the inner cable 1 and the variety of the steel wires used within the strand aren't significantly limited, and conventionally known numerous combination thereof can be employed. Seven steel wires are twisted to obtain one strand, and seven strands are twisted to acquire a wire rope with 7.instances.7 building and an outside diameter of 3.0 mm. When the paste-extrusion method is employed, it's preferable that paste is prepared by adding kerosene to polytetrafluoroethylene powder and kneading them, the paste is extruded to present a tube below high strain and a stranded steel wire is coated with the tube, and after that, the stranded steel wire is dried and baked in a furnace resembling an electric furnace. Among them, polytetrafluoroethylene, tetrafluoroethyleneperfluoroalkylvinyl ether copolymer and tetrafluoroethylene-hexafluoroethylene copolymer, specifically, polytetrafluoroethylene are ideally used because they're glorious in thermal resistance, load effectivity and adaptability. Among them, shield control cable polyoxymethylene is ideally utilized in the current invention as a result of a stickslip is hardly generated when polyoxymethylene is used.

Representative examples of the polyoxymethylene are, for example, DELRIN commercially out there from Du Pont, Celcon commercially obtainable from Hoechst Celanese, and the like. Examples of the thermoplastic resin are, for instance, polybutylene terephthalate, excessive density polyethylene, polyoxymethylene, a fluorocarbon resin represented by polytetrafluoroethylene, a polyamide represented by 6,6-nylon, polyphenylene sulfide, and the like, but the present invention isn't limited by the exemplified ones. The excessive density polyethylene has glorious bodily properties such as excessive load effectivity. Among the thermoplastic resins used in the internal coat, polybutylene terephthalate, excessive density polyethylene, polyoxymethylene and polyphenylene-sulfide are notably preferable as a result of these are excellent in abrasion resistance. Hereinafter, the management cable of the current invention and the technical effect are defined in detail with evaluating some examples and comparative examples. As is obvious from the outcomes shown in Tables 1 to 4, the management cables of the current invention produced in Examples are wonderful in preliminary load effectivity and load efficiency after the operation was carried out 1,000,000 occasions in comparison with the management cables produced in Comparative Examples when each the form of the thermoplastic resin used in the liner in Examples and that in Comparative Examples are the identical. Here's more info on Facebook stop by the web site. With respect to Examples 12 to 15 and Comparative Examples 12 to 14, in accordance with a paste-extrusion technique, 18 parts by weight of kerosene was added to 100 components by weight of polytetrafluoroethylene powder (common particle dimension 25 .mu.m) and kneaded to offer paste, and the paste was extruded underneath high stress to offer a tube.