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Composite flame retardant glass fibre reinforced nylon 66 insulating strip and preparation method thereof

A glass fiber and composite flame-retardant technology, which is applied in the field of composite flame-retardant glass fiber reinforced nylon heat insulation strips and its preparation, can solve the problems of changes in mechanical properties of profiles, small requirements for dimensional accuracy, and influence on mechanical properties, and achieve linear expansion Similar coefficients, high dimensional stability, and excellent mechanical properties

Inactive Publication Date: 2010-08-11
FOSHAN NANHAI YILE ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of extrusion-grade flame-retardant glass fiber reinforced nylon 66 heat insulation strips has the following technical problems: (1) glass fiber is prone to exposure, which affects the smoothness of the material; (2) the density of heat insulation profiles is difficult to meet the requirements; ( 3) The mechanical properties of profiles change greatly at high and low temperatures; (4) The extrusion fluidity of materials and the dimensional stability of profiles change greatly; (6) Halogen-free flame retardants are usually used too much, and the compatibility is not good, which affects the overall mechanical properties of glass fiber reinforced PA66; (7) Nylon 66 absorbs water and becomes soft easily, seriously Affect mechanical properties
Most of the current research is limited to the laboratory level and products that do not require high dimensional accuracy, and has not been really applied to the production of glass fiber reinforced PA66 insulation strips. The main reasons are product formula design, material compatibility, and processing technology. , mold design and other technologies are difficult to cooperate with each other

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition and weight ratio of the composite flame-retardant glass fiber reinforced nylon heat insulation strip used for aluminum alloy doors and windows in this embodiment are as follows:

[0036] Nylon 66 resin: relative viscosity 2.5Pa.s, 100 parts

[0037] Glass fiber: long glass fiber without alkali, 40 parts

[0038] Toughening agent: 12 parts of ethylene-octene-maleic anhydride copolymer

[0039] Coupling agent: 0.6 parts of γ-glycidoxypropyltrimethoxysilane

[0040] Dispersing lubricant: 2 parts of TAF (ethylene bis fatty acid containing polar groups)

[0041] Antioxidant: 0.6 parts of N,N'bis-(3-(3,5-di-tert-butyl-4-hydroxy)propionyl)hexanediamine

[0042] Light stabilizer: 0.5 part of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate

[0043] Heat stabilizer: 0.5 part of dibutyltin dilaurate

[0044] Composite flame retardant: 13 parts of ammonium polyphosphate, 6 parts of magnesium aluminum hydrotalcite

[0045] Masterbatch: 3 copies of black masterbatch

[0046] This emb...

Embodiment 2

[0052] The composition and weight ratio of the composite flame-retardant heat insulation strip in this embodiment are different from those in the first embodiment:

[0053] Glass fiber: short glass fiber without alkali, glass fiber length is 2~5μm 30 parts

[0054] Inorganic filler: 10 parts of hollow beads

[0055] Dispersing lubricant: 0.5 part of bisethylene amide and 1.0 part of erucamide

[0056] Antioxidant: 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite and 0.4 parts of tetra[β-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionic acid] Pentaerythritol ester

[0057] Composite flame retardant: 15 parts of melamine cyanurate, 7 parts of nano-magnesium hydroxide

[0058] The preparation method of the composite flame-retardant heat insulation strip in this embodiment includes the following steps:

[0059] 1) Pretreatment of alkali-free short glass fiber with silane coupling agent.

[0060] 2) After mixing the above nylon 66 resin, toughening agent, oxidizer, heat stabilizer, light sta...

Embodiment 3

[0064] The composition and weight ratio of the composite flame-retardant heat insulation strip in this embodiment are different from those in the first embodiment:

[0065] The amount of toughening agent is 10 parts

[0066] Antioxidant: 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite and 0.4 parts of tetra[β-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionic acid] Pentaerythritol ester

[0067] Composite flame retardant: 15 parts of polyurethane, 7 parts of nano-magnesium hydroxide

[0068] The preparation method of the composite flame-retardant heat-insulating strip in this embodiment is different from the first embodiment in that the temperature of each zone is increased by 3 to 5°C during granulation, and the rotation speed of the main machine should be relatively accelerated, which is 450 to 600 RPM; The traction speed is slightly reduced to 10-50cm / min.

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Abstract

The invention discloses a composite flame retardant glass fibre reinforced nylon 66 insulating strip. The insulating strip comprises the following components: nylon resin, glass fibre, inorganic packing, flexibilizer, coupling agent, dispersing lubricant, antioxidant, light stabilizer, heat stabilizer, composite flame retardant and master batch, wherein the composite flame retardant is a combination of nitrogen flame retardant and / or phosphorus flame retardant and / or nitrogen-phosphorus flame retardant and inorganic metal compound retardant. The invention also discloses a preparation method of the insulating strip. The product of the invention has no halogen, excellent mechanical property and stable dimension of sectional material, solves the problems of the prior art that the halogen-containing fire retardant product generates dense smoke and corrosive gas and has toxicity when used for antiflaming and reduces the secondary disaster caused by the problems; and the problems of the prior art that the dosage of the non-halogen flame retardant is too large and the compatibility is not good, are solved, the influence of using the flame retardant on the overall mechanical performance of the product is avoided, good antiflaming effect is obtained, and the product satisfies and expands the needs of customers and market.

Description

Technical field [0001] The invention relates to the technical field of engineering plastic production, in particular to a composite flame-retardant glass fiber reinforced nylon heat insulation strip for aluminum alloy doors and windows and a preparation method thereof. Background technique [0002] At present, heat-breaking cold bridge technology is commonly used in building energy-saving and heat-insulating aluminum profiles to achieve the purpose of heat insulation and energy saving. As the thermal insulation strip connecting the inner and outer aluminum alloy frames, it must not only be an excellent thermal insulation material, but also its strength and aging resistance must meet the requirements of aluminum alloy doors and windows. The traditional existing technology usually uses PVC, ABS and other plastics to produce heat insulation strips, but its output and quality are low. During use, it is found that its performance can not meet the use requirements at all, and there are...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K13/06C08K7/14C08K3/32C08K3/26C08K5/3492C08L75/04C08K5/521C08K3/38C08K3/02
Inventor 缪明松刘艳斌刘强劳锡寮阮镜财
Owner FOSHAN NANHAI YILE ENG PLASTICS
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