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Durable polyoxymethylene composition

A polyoxymethylene composition and micro-abrasion technology, applied in the manufacture of magnetic head surfaces, magnetic recording heads, etc., can solve problems such as extrusion or injection difficulties, molded product precipitation, product contamination, etc.

Active Publication Date: 2011-10-05
MIN AIK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, although the addition of lubricating oil can effectively improve its wear resistance, it is easy to cause difficulties in extrusion or injection during processing, or serious defects such as bleeding of lubricating oil on the surface of the molded product. Contaminate the product

Method used

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  • Durable polyoxymethylene composition
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  • Durable polyoxymethylene composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The following raw materials (A) polyoxymethylene resin copolymer weight percent 90.5%, (B) melt flow rate 28 grams / 10 minutes (ISO 1133), the lubricant of the low-density polyethylene of 5% weight percent, (C-1 ) 1% by weight of the nano-scale calcium carbonate, (C-3) 1% by weight of the inorganic filler of nano-scale silicon oxide, (D) the nucleating agent of Licomont Cav 102 of 2.0% Clariant by weight and (E) weight IRGANOX 1010, IRGANOX 259 and IRGANOX 1098 of CIBA, melamine, calcium stearate and PALMOWAX stabilizer with a percentage of 0.5% were uniformly mixed with a vertical high-speed mixer for 2 minutes. The mixture of 5 kilograms is dropped into the raw material barrel groove after mixing.

[0054] The homogeneously mixed raw materials are automatically fed into twin-screw extruders with a diameter of 44 mm by a feeder. The length-to-diameter ratio of the extruder is 32, a vacuum degassing hole, 6 heating zones, and the feed rate is set at 35 kg / hour. The tem...

Embodiment 2

[0056] In a method similar to Example 1, change raw materials (A) polyoxymethylene resin weight percentage 91%, (B-1) lubricant of anhydrous maleic acid modified polyethylene of 7% weight percentage, (C) 0.5% Inorganic filler of potassium titanate by weight percentage, (D) 1.0% by weight of Clariant's Licomont Cav102 nucleating agent, and (E) 0.5% by weight of CIBA's IRGANOX 1010, IRGANOX259 and IRGANOX 1098, melamine, stearic acid Calcium stabilizer with PALMOWAX. Detect the properties of the hard disk slideway components, and show the results in Table 2.

Embodiment 3

[0058] In a method similar to Example 1, change raw materials (A) polyoxymethylene resin copolymer weight percent 91 parts, (B) molecular weight 2 million (ASTM D4020), average particle size is 30 microns, ultra-high molecular weight of 7% weight percent Polyethylene lubricant, (C) 0.5% by weight potassium titanate inorganic filler, (D) 1.0% by weight Clariant's Licomont Cav 102 nucleating agent and (E) 0.5% by weight CIBA's IRGANOX 1010 , IRGANOX 259 and IRGANOX 1098, melamine, calcium stearate and PALMOWAX stabilizers. Detect the properties of the hard disk slideway components, and show the results in Table 2.

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Abstract

A durable polyoxymethylene composition and a ramp made of the durable polyoxymethylene composition are disclosed. The durable polyoxymethylene composition of the present invention has excellent micro-wear-resistant property.

Description

technical field [0001] The present invention generally relates to an abrasion resistant polyoxymethylene composition, and a ramp comprising the abrasion resistant polyoxymethylene composition. In particular, the present invention relates to a wear-resistant polyoxymethylene composition, and a slideway comprising the wear-resistant polyoxymethylene composition, which is used in high ambient humidity and high ambient temperature, or in low ambient humidity and low ambient temperature case, has excellent anti-micro-wear (micro-wear-resistant) properties. Background technique [0002] Polyoxymethylene (polyformaldehyde) resin is a widely used engineering resin due to its excellent mechanical properties, excellent chemical resistance and good anti-wear performance. Polyoxymethylene resin has excellent wear resistance and is widely used in industrial parts that require friction and wear resistance. However, under special working environments, there is still room for improvement i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L23/06C08K13/02C08K3/22C08K5/103C08K3/24C08K3/26C08K3/36G11B5/187
CPCC08L59/00C08K5/0016C08K5/005C08K5/0075C08K5/0083C08K3/0033C08K3/013
Inventor 张荣宝林琪恩
Owner MIN AIK TECH