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PBT composite material used for NMT forming and preparation method thereof

A technology of composite materials and nanomaterials, which is applied in the field of PBT composite materials and its preparation, can solve the problems of affecting the service life of modified PBT materials, affecting the appearance of products, and large warpage.

Active Publication Date: 2016-02-17
SHENZHEN XINGSHENGDI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, glass fiber reinforced PBT materials still have shortcomings, that is, when large-scale products or thin-walled parts are injected, large warpage will occur, which not only affects the appearance of the product, but also affects the service life of the modified PBT material
A large number of patent documents and published research papers have been retrieved, and no research reports on PBT materials applied to NMT molding have been found, especially no use of polybutylene terephthalate (PBT) as a raw material, adding ethylene-octene Block copolymer OBC, nano-iron oxide, nano-magnesia or nano-alumina, flat E-glass fibers and chopped E-glass fibers to prepare polybutylene terephthalate (PBT) composites that can be used for NMT molding Material

Method used

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  • PBT composite material used for NMT forming and preparation method thereof
  • PBT composite material used for NMT forming and preparation method thereof
  • PBT composite material used for NMT forming and preparation method thereof

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preparation example Construction

[0040] The above-mentioned preparation method for the PBT composite material of NMT molding, comprises the steps:

[0041] Step S110, weighing the following raw materials according to the mass fraction: 100 parts of polybutylene terephthalate, 10-15 parts of toughening agent, 30-40 parts of reinforcing agent, 3-5 parts of lubricant, compatibilizer 5-8 parts, 0.2-0.8 parts of nanomaterials, 0.5-1 part of antioxidant, and 0.5-1.0 parts of coupling agent, wherein the nanomaterials are selected from at least one of nano-alumina, nano-magnesia and nano-iron oxide The reinforcing agent is glass fiber.

[0042] Polybutylene terephthalate (PBT) is the main raw material. Preferably, the intrinsic viscosity of PBT resin is 1.15-1.18dL / g, and the density is 1.31-1.33g / cm 3 , Melting point 223~227℃, mass melt flow rate 27~29g / 10min, tensile strength 55.2MPa, flexural strength 81.7MPa.

[0043]Preferably, the toughening agent is an ethylene-octene block copolymer, and the mass content o...

Embodiment 1

[0071] The preparation steps of the PBT composite material used for NMT molding of the present embodiment are as follows:

[0072] (1), in parts by mass, take the components in Table 1:

[0073] Table 1

[0074]

[0075]

[0076] (2) Put the nanomaterial in a high-speed mixer, put 1 part of silane coupling agent in beaker A, weigh the absolute ethanol according to the ratio of silane coupling agent: absolute ethanol at 1:2.3 and place it in beaker A, At the same time, stir at room temperature for X minutes to make it evenly mixed; start the high-speed mixer, set the temperature to 70°C, and set it in low-speed mode, add the prepared silane coupling agent ethanol solution at a uniform speed at the upper liquid inlet, after the coupling agent is added Start the high-speed mode and stir at a high speed for 8 minutes to obtain the first material, wherein the rotation speed of the high-speed stirring is 950 rpm.

[0077] (3) Put the glass fiber in a high-speed mixer, put 1 ...

Embodiment 2

[0082] The preparation steps of the PBT composite material used for NMT molding of the present embodiment are as follows:

[0083] (1), in parts by mass, take the components in Table 2:

[0084] Table 2

[0085]

[0086] (2) Put the nanomaterial in a high-speed mixer, put 1 part of silane coupling agent in beaker A, weigh the absolute ethanol according to the ratio of silane coupling agent: absolute ethanol at 1:7 and place it in beaker A, At the same time, stir at room temperature for 2 minutes to make it evenly mixed; start the high-speed mixer, set the temperature to 65°C, and set it in low-speed mode, add the prepared silane coupling agent ethanol solution at a uniform speed at the upper liquid inlet, after the coupling agent is added Start the high-speed mode and stir at a high speed for 1 minute to obtain the first material, wherein the rotation speed of the high-speed stirring is 950 rpm.

[0087] (3) Put the glass fiber in a high-speed mixer, put 1 part of silane ...

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Abstract

The invention relates to a PBT composite material used for NMT forming and a preparation method thereof. The PBT composite material used for NMT forming is characterized by being prepared from, by mass, 100 parts of polybutylene terephthalate, 10-15 parts of flexibilizers, 30-40 parts of reinforcing agents, 3-5 parts of lubricating agents, 5-8 parts of compatilizers, 0.2-0.8 part of nano materials, 0.5-1 part of antioxidants and 0.5-1 part of coupling agents. The nano materials are prepared from at least one of nano alumina, nano magnesia and nano iron oxide. The reinforcing agents are prepared from glass fibers. The PBT composite material used for NMT forming can be applied to NMT forming.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PBT composite material used for NMT molding and a preparation method thereof. Background technique [0002] NMT (NanoMolding Technology) is a nano-molding technology that integrates metal and plastic. It was first developed by Japan's Taisei Plastics Co., Ltd. (Taiseiplas). It can integrate aluminum, magnesium, stainless steel, titanium and other metals with hard resin. At present, NMT molding technology is widely used in thin, light, and portable 3C products, such as notebook casings, projector casings, mobile phone casings, MP3 players, and so on. The core concept of NMT molding technology is to combine metal and plastic, replace the commonly used embedded injection, zinc-aluminum, magnesium-aluminum alloy die-casting parts, and provide a plastic-metal integrated product with a price advantage and high performance. [0003] The treatment process of NMT includes the...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L53/00C08L83/04C08L23/08C08K13/04C08K7/14C08K3/22
Inventor 许第修包含
Owner SHENZHEN XINGSHENGDI NEW MATERIALS
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