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Process for preparing high-strength wearable polyamide 1012

A polyamide, high-strength technology, applied in the field of preparation of long glass fiber reinforced polyamide 1012, can solve the problems of no examples, no experimental data characterization, etc.

Inactive Publication Date: 2008-05-14
上海赛璐化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above content of this patent is not supported by the examples
There is no corresponding experimental data to characterize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The mixture of 100 parts by weight of polyamide 1012 and 1.3 parts by weight of ethylene bis stearic acid amide (EBS) is added in the feeding section of the twin-screw extruder from the feeding funnel, and the temperature control of each section of the screw rod is 210 ° C in the feeding section, and the compression The section is 255°C, the homogenization section is 205°C, the screw compression ratio is 4:1, the length-to-diameter ratio is 35:1, and the screw speed is 600 rpm. The material is transferred from the feeding section to the homogenizing and melting section through the compression section. At this time, 30 parts by weight of long glass fiber filaments enter the homogenizing and melting section from the top side of the homogenizing and melting section. The diameter of the glass filament is 13 microns, and all materials are uniformly molded in this section and make it quantitatively and under constant pressure to extrude from the die mouth, cool, cut into 3-5 m...

Embodiment 2

[0013] Except that the relative viscosity of polyamide 1012 is 2.0, the addition of EBS is 0.5 parts by weight, the addition of glass fiber is 20 parts by weight, the diameter of glass fiber is 10 microns, the temperature of the feeding section of the screw is 200 ° C, the temperature of the compression section is 240 ° C, homogenization Except that the section is 200°C, other operating steps and control parameters are exactly the same as in Example 1. As a result, the performance of the product test piece is 115MPa in tensile strength, heat distortion temperature (1.82MPa load) is 174°C, and flexural modulus of elasticity is 5.0GPa. Taber wear amount is 0.55mg, linear expansion coefficient is 4.23×10 -5 K -1 , water absorption (23°C, 24h) 8.0mg,

Embodiment 3

[0015] Except that the relative viscosity of polyamide 1012 is 2.5, the addition of EBS is 2 parts by weight, the addition of glass fiber is 40 parts by weight, the diameter of glass fiber is 15 microns, the temperature of the feeding section of the screw is 220 ° C, the temperature of the compression section is 270 ° C, and the homogenization section is Except 210 ℃, other operating steps and control parameters are exactly the same as embodiment 1, and the result product test piece performance is tensile strength 125MPa, heat deflection temperature (1.82MPa load) is 180 ℃, flexural modulus of elasticity 6GPa, Taber (Taber ) wear amount is 0.5mg, linear expansion coefficient 4.0×10 -5 K -1 , water absorption (23°C, 24h) 7.9mg.

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Abstract

The invention discloses a preparing method of high-strength, abrasive polyamide 1012, which is characterized by the following: adapting two-screw squeezer at 4:1 compression rate, 35:1 long diameter rate, 200-220 deg.c feeding segment temperature, 240-270 deg.c compression segment temperature, 200-210 deg.c uniforming fusing segment temperature to produce high-strength, abrasive polyamide 1012; 20-40 glass fiber, 0.5-2 EBS coupler, 10-15 mm glass fiber diameter are added to form polyamide 1012 through compression segment, which is quantified, squeezed, cooled and cut into 3-5 mm particle; the physical mechanic property of product part is 115-125 Mpa stretching strength, 174-180 deg.c heat deforming temperature, 5.0-6 GPa bent spring modulus, 0.55-0.5 mg Taber abrasion quatity, 3.23-4.23*10-5k-1 linear expansion coefficient, 7.9-8.9 mg hydroscopicity.

Description

(1) Technical field [0001] The present invention relates to a preparation method of high-strength, abrasion-resistant polyamide 1012, more specifically, relates to a preparation method of long glass fiber reinforced polyamide 1012. (2) Background technology [0002] It is well known that polyamide resin has many advantages, such as: excellent heat resistance, surface appearance and dimensional stability of molded products, etc., and can be processed by injection molding, extrusion molding and blow molding. Widely used in the automotive field, such as intake manifolds, and various mechanical parts. Long carbon chain nylon has the characteristics of low relative density, low water absorption, stable size, excellent low temperature resistance, and wide processing temperature range. The product has high impact strength, wear resistance, oil resistance, excellent electrical properties and chemical resistance. Polyamide 1012 is a kind of long carbon chain nylon, which has the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08K7/14B29C47/40
Inventor 戴军金惠明
Owner 上海赛璐化工股份有限公司