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Polyester fiber reinforced injection phenolic molding compound and its preparation method

A technology of phenolic molding compound and polyester fiber, which is applied in the field of phenolic molding compound, can solve the problems of insufficient mechanical properties, high thermal deformation temperature of molding compound, and low thermal weight loss rate at high temperature, so as to improve interfacial compatibility and improve Dispersibility and the effect of reducing water absorption

Active Publication Date: 2016-09-28
桂林金格电工电子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molding compound produced by this scheme has a high thermal deformation temperature and a low high-temperature thermal weight loss rate, but its mechanical properties are only described by the notched impact strength, which is between 3.0 and 3.5 kJ / m 2 Within the range, there is no description of other mechanical properties (such as bending strength, etc.) and water absorption

Method used

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  • Polyester fiber reinforced injection phenolic molding compound and its preparation method
  • Polyester fiber reinforced injection phenolic molding compound and its preparation method
  • Polyester fiber reinforced injection phenolic molding compound and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) Weigh the following components for later use: 100 parts of novolac resin (that is, thermoplastic phenolic resin, the same below), 10 parts of hexamethylenetetramine, 80 parts of silicon micropowder of 400-600 mesh, and 2-5 mm in length 25 parts of polyester fiber, 3 parts of magnesium hydroxide, 1 part of calcium stearate;

[0046] 2) Take silicon micropowder and titanate coupling agent equivalent to 0.5% of its dosage and place it in a ball mill tank for ball milling, control the speed of the ball mill tank to 10rpm, and the ball milling time is 10min;

[0047] 3) Take hexamethylenetetramine and pulverize it to 80 meshes, and then mix it evenly with the surface-treated silicon micropowder and other components;

[0048] 4) put the mixed material into a twin-screw extruder for extrusion, the barrel temperature of the twin-screw extruder is 75-90°C, and the screw rotation speed is 80rpm;

[0049] 5) After the extruded material is cooled to normal temperature, it is pu...

Embodiment 2

[0062] 1) Weigh the following components for later use: 100 parts of novolac resin, 15 parts of hexamethylenetetramine, 50 parts of calcite of 600-800 mesh, 45 parts of polyester fiber with a length of 1-10 mm, 5 parts of magnesium hydroxide 2 parts, 2 parts of zinc stearate, 5 parts of iron red;

[0063] 2) Take calcite and aluminate coupling agent equivalent to 4% of its dosage and place it in a ball mill jar for ball milling, control the rotating speed of the ball mill jar to 50rpm, and the ball milling time is 80min;

[0064] 3) get hexamethylenetetramine and pulverize to 100 orders, then mix with surface-treated calcite and other components;

[0065] 4) put the mixed material into a twin-screw extruder for extrusion, the barrel temperature of the twin-screw extruder is 90-100°C, and the screw rotation speed is 90rpm;

[0066] 5) After the extruded material is cooled to normal temperature, it is pulverized into irregular powder with a diameter of 2-5 mm to obtain the poly...

Embodiment 3

[0079] 1) Take the following components by weight percentage for later use: 100 parts of novolac resin, 20 parts of hexamethylenetetramine, 30 parts of calcium carbonate of 100-300 mesh, 55 parts of polyester fiber with a length of 5-10 mm, 1 part of calcium oxide, 5 parts of zinc stearate;

[0080] 2) Take calcium carbonate and a silane coupling agent equivalent to 6% of its dosage and place it in a ball mill jar for ball milling, control the speed of the ball mill jar to 30rpm, and the ball milling time is 60min;

[0081] 3) take hexamethylenetetramine and pulverize it to 80 meshes, then mix it evenly with surface-treated calcium carbonate and other components;

[0082] 4) put the mixed material into a twin-screw extruder for extrusion, the barrel temperature of the twin-screw extruder is 75-85°C, and the screw rotation speed is 90rpm;

[0083] 5) After the extruded material is cooled to normal temperature, it is pulverized into irregular powder with a diameter of 4-6 mm to...

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Abstract

The invention discloses a polyester fiber-reinforced injection-type phenolic aldehyde molding compound and a preparation method thereof. The polyester fiber-reinforced injection-type phenolic aldehyde molding compound is mainly prepared from a linear phenolic resin, hexamethylene tetramine, an inorganic filling material and polyester fibers. The preparation method comprises the following steps of 1, weighing raw materials for next use, 2, putting the inorganic filling material and a coupling agent into a ball mill or a ball milling tank, and carrying out ball milling to obtain a uniform mixture, wherein the use amount of the coupling agent is 0.5-10wt% of that of the inorganic filling material and the inorganic filling material comprises one or more of aluminum hydroxide, silica micropowder, calcite, talc, calcium carbonate, glass beads, kaolin and clay powder, 3, crushing hexamethylene tetramine, mixing the crushed hexamethylene tetramine and the inorganic filling material and other raw materials subjected to surface treatment to obtain a uniform mixture, 4, putting the mixture into a double screw extruder and carrying out extrusion and 5, cooling the extruded material and carrying out crushing. The polyester fiber-reinforced injection-type phenolic aldehyde molding compound obtained by the preparation method has high mechanical properties and low water absorbency.

Description

technical field [0001] The invention relates to a phenolic molding compound, in particular to a polyester fiber reinforced injection type phenolic molding compound and a preparation method thereof. Background technique [0002] Phenolic molding compound is a composite material prepared with phenolic resin as the base material and other fillers as the main raw materials. It has excellent comprehensive properties such as low price, heat resistance, stable product size, good electrical insulation, and high mechanical properties. Widely used in electronics, electrical appliances, automobiles and other industries [2] . With the continuous development of the economy, the demand for high-performance materials continues to increase, and the performance requirements for phenolic molding compounds are also getting higher and higher, and higher requirements are put forward for the mechanical properties and heat resistance of this type of materials. [0003] In the prior art, reinforc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L67/00C08K13/06C08K9/04C08K9/06C08K3/22C08K3/02C08K3/26C08K3/34C08K7/20C08K5/17C08J5/04
Inventor 钟立松覃家波刘建文陈武荣
Owner 桂林金格电工电子材料科技有限公司
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