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Low-warping high-rigidity conductive PBT composite material and preparation method

A composite material and high rigidity technology, which is applied in the field of low warpage and high rigidity conductive PBT composite material and its preparation, can solve the problem of not mentioning the influence of physical and mechanical properties and conductive properties of PBT materials, and not mentioning the conductive properties of PBT materials High rigidity, excellent formability, and improved warpage

Inactive Publication Date: 2014-05-14
SHANGHAI CHANGWEI JINCI ENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, ordinary reinforced PBT materials have large warpage and general conductivity, and the warpage and conductivity problems once put the PBT market in a dilemma. At present, various manufacturers attach great importance to the research of PBT materials with low warpage and high conductivity. At present, the widely used method to solve the problem of PBT warpage and conductivity is to use mineral filling, graphite fiber, metal powder or glass fiber composite filling to reduce the warpage problem and improve conductivity. A lot of work has been done in this regard
[0006] In the patent CN1563186A, Weng Yonghua and others improved the warping of PBT materials ideally by adding magnesium salt whiskers, and at the same time had a certain strengthening effect on the material, but he did not mention the influence of these additives on the electrical conductivity of PBT materials
[0007] In U.S. Patent No.5075354, Wilder et al. used a method of mixing specially treated glass microspheres and ordinary fibers to improve warpage, but he also did not mention that these additives have other physical and mechanical properties and electrical conductivity of PBT materials. performance impact

Method used

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  • Low-warping high-rigidity conductive PBT composite material and preparation method

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Experimental program
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Effect test

Embodiment 1

[0043] The following components in parts by weight (1 part=100g): 560 parts of PBT, 30 parts of GMA, 110 parts of ASA, 30 parts of wollastonite, 6 parts of oxidized polyethylene wax, 2 parts of antioxidant 168, 2 parts Antioxidant 1010 is dry-blended in a high-speed mixer at room temperature, and placed in a single-screw extruder, and then enters a twin-screw extruder after melt extrusion, and 180 parts of chopped carbon fiber, 80 parts of chopped carbon fiber Glass fiber blending, the screw speed is 100Hz, melted and extruded at 225-235°C, and granulated to make a composite material. The heating zones of the single screw are: the first zone is 225-230°C, the second zone is 230-235°C, The third zone is 230~235℃, the fourth zone is 230~235℃; the heating zones of the twin-screw are respectively: the first zone is 200~210℃, the second zone is 210~235℃, the third zone is 210~235℃, and the fourth zone is 215~230℃ , 210-235°C in the fifth zone, 210-235°C in the sixth zone, 215-230°C...

Embodiment 2

[0045] The following components in parts by weight (1 part=100g): 460 parts of PBT, 20 parts of GMA, 20 parts of MMA, 120 parts of ABS, 50 parts of talcum powder, 6 parts of pentaerythritol stearate, 2 parts of antioxidant 168. Two parts of antioxidant 1010 were dry-blended in a high-speed mixer at room temperature, placed in a single-screw extruder, melted and extruded and then entered into a twin-screw extruder unit, and mixed with 150 parts of chopped carbon fiber, 120 parts of chopped glass fibers are blended, the screw speed is 100Hz, melted and extruded at 225-235°C, and granulated to make a composite material. The heating zones of the single screw are: the first zone 225-230°C, the second zone 230 ~235°C, three zones 230~235°C, four zones 230~235°C; twin-screw heating zones are: zone one 200~210°C, zone two 210~235°C, zone three 210~235°C, zone four 215~230℃, 210~235℃ in the fifth zone, 210~235℃ in the sixth zone, 215~230℃ in the seventh zone, 210~225℃ in the eighth zon...

Embodiment 3

[0047] The following components in parts by weight (1 part=100g): 506 parts of PBT, 50 parts of MBS, 50 parts of AS, 50 parts of ASA, 80 parts of calcium carbonate, 5 parts of oxidized polyethylene wax, 5 parts of pentaerythritol stearic acid Ester, 2 parts of antioxidant 168, and 2 parts of antioxidant 1010 were dry mixed in a high-speed mixer at room temperature, and placed in a single-screw extruder, and then entered into a twin-screw extruder after melt extrusion. Blended with 250 parts of chopped carbon fiber, the screw speed is 100Hz, melted and extruded at 225-235°C, and granulated to make a composite material. The heating zones of the single screw are: the first zone 225-230°C, the second zone 230 ~235°C, three zones 230~235°C, four zones 230~235°C; twin-screw heating zones are: zone one 200~210°C, zone two 210~235°C, zone three 210~235°C, zone four 215~230℃, 210~235℃ in the fifth zone, 210~235℃ in the sixth zone, 215~230℃ in the seventh zone, 210~225℃ in the eighth zo...

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Abstract

The invention discloses a low-warping high-rigidity conductive PBT composite material and a preparation method. The low-warping high-rigidity conductive PBT composite material comprises the following components by weight: 450-560 parts of PBT resin, 150-250 parts of carbon fiber, 0-120 parts of glass fiber, 100-120 parts of ABS resins, 30-50 parts of compatible flexibilizer and 30-80 parts of inorganic filler; wherein the ABS resins are one or more mixed by ABS resin, AS resin, BS resin, ASA resin or AES resin; and the compatible flexibilizer is an acrylate compound. The invention also provides a method for preparing the PBT composite material by employing the PBT composition. The composite material is capable of keeping high rigidity and excellent conductivity, as well as improving the warping in an ideal mode.

Description

technical field [0001] The invention relates to a polymer composite engineering material, in particular to a low warpage and high rigidity conductive PBT composite material and a preparation method thereof. Background technique [0002] As one of the five major engineering plastics, polybutylene terephthalate (PBT) can be used in printers, banknote printing machines, ticket issuing machines, etc. due to its excellent heat resistance, flame retardancy, and molding processability. In the field of paper operation, to replace the parts made of metal, while meeting the functional requirements, it also achieves the requirements of light weight and cost reduction. Since these replacement parts are mostly key function keys, in addition to ensuring high strength, they must also have good electrical conductivity, so as to eliminate the charge generated by friction between paper and paper and parts in time, and at the same time To achieve stable assembly and paper feeding, the product...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L55/02C08L25/12C08L25/10C08L51/00C08K13/04C08K7/06C08K7/14
Inventor 朱爱华张剑程方清赵志刚岳同健
Owner SHANGHAI CHANGWEI JINCI ENG PLASTIC
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