Environment-friendly high fire-retardant melting sealed double-wall pipe

A double-wall pipe, high flame retardant technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of low quality, poor flame retardant effect and high cost of double-wall pipes, and achieve significant economical benefits. Benefits and environmental protection benefits, low longitudinal shrinkage, good shrinkage temperature

Inactive Publication Date: 2011-05-04
福建陶金峰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there are many disadvantages of low quality, high cost or poor flame retardant effect for double-walled tubes with halogen-free flame retardants.

Method used

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  • Environment-friendly high fire-retardant melting sealed double-wall pipe
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  • Environment-friendly high fire-retardant melting sealed double-wall pipe

Examples

Experimental program
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Effect test

preparation example Construction

[0019] The preparation process of the double-wall pipe is as follows:

[0020] (1) Preparation of the outer wall material of the flame retardant double-wall pipe: the proportion of each component of the raw materials, according to the mass fraction: poly-polyolefin mixed resin 40-45 parts, flame retardant 50-58 parts, lubricant 1-2 parts, antioxidant 1-2 parts of anti-copper agent, 0.5 parts of anti-copper agent, 2-3 parts of smoke suppressant, 2 parts of processing stabilizer, 2 parts of sensitizing cross-linking auxiliary; the polyolefin mixed resin is EVA630, EVA421, EVA28-3 The polyolefin mixed resin obtained by melt blending with EVA220 four kinds of polyolefin materials; the components of the raw materials are added to the internal mixer according to the proportion or added to the twin-screw mixer after being stirred by a high-speed mixer, at 160± Under the temperature condition of 10 ℃, after full stirring and mixing, the screw speed is 100-125 rpm, and the mixing tempe...

Embodiment 1

[0042] The preparation process of the double-wall pipe is as follows:

[0043] (1) Prepare the outer wall material of the flame-retardant double-walled pipe: the proportion of each component of the raw materials, according to the parts by mass: 40 parts of polyolefin mixed resin, 50 parts of flame retardant, 1 part of paraffin, and 1010 (four (β-( 3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid) pentaerythritol ester) 1 part, anti-copper agent: hydroxy-terminated polybutadiene acrylonitrile liquid rubber MDA-10240.5 parts, smoke suppressant: zinc borate 2 parts, processing stabilizer: rare earth composite stabilizer (REC series, such as REC-LS-A or REC-LS-B commonly sold in the market) 2 parts, sensitizing cross-linking aid: 2 parts trimethylolpropane TMP Described polyolefin mixed resin is the polyolefin mixed resin obtained by melt blending four kinds of polyolefin materials of EVA630, EVA421, EVA28-3 and EVA220; The polyolefin mixed resin in step (1) is to be by weight pe...

Embodiment 2

[0056] The preparation process of the double-wall pipe is as follows:

[0057] (1) Prepare the outer wall material of the flame-retardant double-wall pipe: the proportion of each component of the raw materials, according to the parts by mass: 45 parts of polyolefin mixed resin, 58 parts of flame retardant, 2 parts of paraffin, and 1010 parts of antioxidant (tetra(β-( 3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid) pentaerythritol ester) 2 parts, anti-copper agent: 0.5 part of hydroxyl terminated polybutadiene acrylonitrile liquid rubber MDA-1024, smoke suppressant: zinc borate 3 parts, processing stabilizer: 2 parts rare earth composite stabilizer (REC-LS-D or REC-LS-F), sensitizing crosslinking aid: 2 parts trimethylolpropane TMP; the polyolefin mixed resin is The polyolefin mixed resin obtained by melt-blending four kinds of polyolefin materials of EVA630, EVA421, EVA28-3 and EVA220; the polyolefin mixed resin in step (1) is to be by weight percentage: EVA63025%, EVA421 1...

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Abstract

The invention provides an environment-friendly high fire-retardant melting sealed double-wall pipe, which is prepared by the steps of: adopting a polyolefin mixed resin and a special composite inorganic fire retardant as main raw materials; adding an additive into the mixture; granulating to obtain an outer wall material of the double-wall pipe; taking the polyolefin mixed resin as a main raw material; adding the additive into the polyolefin mixed resin; and granulating to obtain an inner wall material of the double-wall pipe; and co-extruding, irradiating, dilatating, and cutting off the outer wall material and the inner wall material. The double-wall pipe adopts the special composite inorganic fire retardant in the raw materials; and the product has good fire-retardant effect, is high temperature resistant, has good performance, has no pollution in combustion, reduces the cost, has remarkable economic benefit and environmental protection benefit, and is suitable for mass popularization and application.

Description

technical field [0001] The invention belongs to the technical field of chemical product preparation, and more particularly relates to an environment-friendly high-flame-retardant melt-sealed double-wall pipe. Background technique [0002] The heat-shrinkable double-wall pipe currently on the market has an inner and outer two-layer structure, which is composed of a flame-retardant polymer outer layer with a shape memory function that can be radially shrunk by heating, and an inner adhesive layer that can melt and flow at the shrinking temperature. After heating, the internal adhesive layer melts and flows and fills, which can be widely used in aviation, aerospace, ships, automobiles, home appliances, communications, petrochemicals and other fields, and can play a role in flame retardant, moisture-proof, waterproof, and circuit connections at wire connections and branches. Anti-corrosion, anti-vibration dislocation and so on. The halogen-containing flame retardant is used in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/18F16L9/12B29C47/56B29C47/04B29B7/28B29B7/72B29B9/00B29C71/02
Inventor 吴良芳王喜锋
Owner 福建陶金峰新材料有限公司
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