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Flame-retardant tube and heat-shrinkable tube made by using the same

A flame retardant and flame retardant technology, applied in the field of tubes and heat shrinkable tubes, which can solve the problems of insufficient heat resistance, melting, and inability to maintain shape, and achieve the effects of excellent tensile properties and excellent heat resistance.

Active Publication Date: 2013-10-09
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance is not sufficient, especially when it is intended to be used as a heat-shrinkable tube for airtight packaging, the shape cannot be maintained during the diameter expansion process, or it may melt during the heat-shrinking process or the processing process of the packaged object. Case

Method used

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  • Flame-retardant tube and heat-shrinkable tube made by using the same
  • Flame-retardant tube and heat-shrinkable tube made by using the same
  • Flame-retardant tube and heat-shrinkable tube made by using the same

Examples

Experimental program
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Effect test

Embodiment

[0074] The best mode for carrying out the present invention will be described by way of examples. The examples do not limit the scope of the invention.

[0075] In addition, in the following examples, "parts" means "parts by mass" unless otherwise specified.

[0076] [measurement evaluation method]

[0077] First, the measurement and evaluation methods performed in the following examples will be described.

[0078] (1) Tensile properties

[0079] For the tube, perform a tensile test (tensile speed = 500 mm / min, distance between the marking lines = 20 mm), measure the tensile strength (MPa) and tensile elongation at break (%) for each 3 points of the sample, and obtain take their average. A tensile strength of 10.4 MPa or more and a tensile elongation at break of 150% or more are acceptable levels.

[0080] (2) Heat resistance

[0081] After the tube was left to stand for 168 hours (7 days) in a Jill aging incubator set at 158°C, the tensile test of (1) was performed. Wh...

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Abstract

A non-halogen type flame-retardant tube which exhibits satisfactory flame retardance, tensile characteristics under high temperature, and heat deformation resistance; and a heat -shrinkable tube, more specifically, a flame-retardant tube produced by molding a flame-retardant resin composition which comprises 100 parts by mass of a base polymer comprising 5 to 80mass% of polyphenylene ether, 20 to 95mass% of a styrenic thermoplastic elastomer, and 0 to 70mass% of an olefinic polymer, 5 to 100 parts by mass of a phosphorus-containing flame retardant, 3 to 80 parts by mass of a nitrogenous organic compound, and 1 to 20 parts by mass of a polyfunctional monomer into a tube and irradiating the tube with an electron beam; and a heat-shrinkable tube produced by subjecting the tube to diameter expansion under heating and then setting the tube by cooling.

Description

technical field [0001] The present invention relates to a tube and a heat shrinkable tube which are made of a halogen-free flame-retardant material and are excellent in shape retention and tensile properties at high temperatures. Background technique [0002] For various components and internal wiring used in electronic equipment, OA equipment, audio, video recorders, DVD and other consumer electronic equipment, vehicles, ships, etc., for waterproof, dustproof, insulation, etc., flame-retardant tubes ( Flame retardant tube) and other tight packaging for protection. [0003] Such flame-retardant tubes for airtight packaging are required to have flame retardancy that can pass the UL standard vertical flame test (Vertical Specimen-Flame test) VW-1 in order to prevent components from catching fire due to temperature rise. In the past, as a flame retardant material, a flexible polyvinyl chloride composition or polyethylene, ethylene-ethyl acrylate copolymer, ethylene-vinyl aceta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08J5/00C08J7/00C08K5/3477C08K5/51C08L71/12
CPCC08K5/51C08L53/00C08J2371/12C08L71/12C08J7/123C08L2666/24C08J5/00C08K5/3477C08L53/02
Inventor 森内清晃早味宏东修司冈部昭平
Owner SUMITOMO ELECTRIC IND LTD
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