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Low-floating-fiber polyformaldehyde material as well as preparation method and application thereof

A polyoxymethylene material and low-floating fiber technology, applied in the field of engineering plastics, can solve the problems of chemical inertness of molecular chains, poor appearance, insufficient glass fiber wrapping, etc., and achieve high strength and improve the effect of floating fiber problems.

Pending Publication Date: 2022-04-05
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the crystallinity of POM resin is as high as 60%, and the crystallization speed is fast, the molecular chain is chemically inert, resulting in insufficient wrapping of glass fibers, resulting in floating fibers on the surface of reinforced POM products, and poor appearance, which limits its use. application

Method used

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  • Low-floating-fiber polyformaldehyde material as well as preparation method and application thereof
  • Low-floating-fiber polyformaldehyde material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13

[0045] Embodiments 1-13 provide a kind of polyoxymethylene material with low floating fiber, and its weight part formula is shown in Table 1-2, and the preparation method is as follows:

[0046] (1) Add polyoxymethylene, carboxyl-terminated hyperbranched polyester, primary antioxidant and secondary antioxidant together into a high-speed mixer and mix for 2 to 5 minutes to mix the raw materials evenly to obtain a premix;

[0047] (2) Add the premixed material into the twin-screw extruder from the main feeding port, and add the glass fiber into the twin-screw extruder from the side feeding port, and melt and extrude, cool and granulate through the twin-screw extruder to obtain low Float fiber acetal material. Among them, the temperature of each screw barrel of the twin-screw extruder from the feed port to the machine head is: 150-170°C, 160-180°C, 160-180°C, 160-180°C, 170-190°C, 170-190°C , 170~190℃, 180~200℃, 180~200℃ and 180~200℃, the screw speed is 250~400rpm, the feeding a...

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Abstract

The invention discloses a low-floating-fiber polyformaldehyde material as well as a preparation method and application thereof, and belongs to the technical field of engineering plastics. The low-floating-fiber polyformaldehyde material comprises the following components in parts by weight: 72 to 89 parts of polyformaldehyde, 10 to 25 parts of glass fiber and 0.5 to 2 parts of carboxyl-terminated hyperbranched polyester. By introducing the carboxyl-terminated hyperbranched polyester, the problem of floating fibers caused by glass fiber reinforced polyformaldehyde is effectively improved, the high-strength low-floating-fiber polyformaldehyde material is obtained, and the application requirements of the industrial fields of kitchen utensils, household appliances, automobiles and the like requiring that the appearance of a product does not have obvious floating fibers are met.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a polyoxymethylene material with low floating fibers and its preparation method and application. Background technique [0002] Polyoxymethylene (POM) resin has excellent mechanical properties, wear resistance, high rigidity and oil resistance, and is widely used in automobiles, electronic appliances, kitchen utensils, home appliances and other fields. At present, the modification of POM resin mainly includes toughening, weather resistance, wear resistance, reinforcement, etc. Among them, the enhancement is generally by adding glass fiber to make the system obtain higher performance. However, because the crystallinity of POM resin is as high as 60%, and the crystallization speed is fast, the molecular chain is chemically inert, resulting in insufficient wrapping of glass fibers, resulting in floating fibers on the surface of reinforced POM products, and po...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08L67/00C08K7/14
CPCY02P70/10
Inventor 曹绍强黄险波叶南飚陈锋付学俊丁超
Owner KINGFA SCI & TECH CO LTD
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