Low-fiber-floating glass-fiber-reinforced toughening polypropylene composite material and preparation method thereof

A composite material, reinforcement and toughening technology, applied in the field of polyolefin, can solve the problems of not too much glass fiber content, obvious floating fiber problem, bad appearance of parts, etc., and achieve good dimensional stability, high impact resistance, and promote crystallization effect

Active Publication Date: 2014-04-02
上海日之升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN103265761A discloses a low-floating fiber-reinforced polypropylene material prepared by modifying the surface of polypropylene with a low-molecular polar substance, maleic anhydride, etc., and an initiator. However, although the material has greater mechanical properties improved, but the floating fiber problem is still obvious
[0005] The above technologies improve the compatibility of polypropylene and glass fibers by treating glass fibers or adding compatibilizers; the disadvantage is that the content of glass fibers added should not be too much, otherwise the exposure of floating fibers is still serious, and the processing performance is poor, resulting in Part appearance is not good
The problem of floating fibers on the surface of the product can be improved by adding elastomers, and the current application in polypropylene has not been involved

Method used

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  • Low-fiber-floating glass-fiber-reinforced toughening polypropylene composite material and preparation method thereof
  • Low-fiber-floating glass-fiber-reinforced toughening polypropylene composite material and preparation method thereof
  • Low-fiber-floating glass-fiber-reinforced toughening polypropylene composite material and preparation method thereof

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preparation example Construction

[0032] In order to achieve the above-mentioned second purpose, the technical solution adopted by the present invention is: the preparation method of the low-floating fiber glass fiber reinforced toughened polypropylene composite material comprises the following steps: weighing raw materials according to the proportion; removing the glass fiber The other components are mixed in a high-speed mixer for 5-10 minutes, and the glass fiber is fed into the extruder through the side feeding port, extruded by a twin-screw machine, cooled and granulated, and finally the granules are dried to obtain a low-floating Fiberglass reinforced toughened polypropylene composites.

[0033] The speed of the twin-screw extruder is 200-500r / min, and the temperature of the extruder from feeding to the machine head is set as: 185°C, 190°C, 205°C, 210°C, 210°C, 210°C, 200°C , 185°C, 180°C, vacuum degree ≤0.06MPa.

Embodiment 1

[0039] (1) Raw materials are weighed in parts by weight: polypropylene 84, elastomer 3, graft monomer 3, initiator 0.5, antioxidant 0.5, other additives 1;

[0040] (2) Polypropylene, elastomer, graft monomer, initiator, antioxidant and other auxiliary agents are placed in a high mixer and mixed for 10 minutes;

[0041] (3) Put the material into the twin-screw extruder, control the feeding speed, and feed glass fiber into the extruder through the side feeding port; control the number of glass fibers and feeding speed, and control the glass fiber content 10. For granulation, the rotational speed of the twin-screw machine is 300 rpm: the twin-screw extrusion process is listed in Table 2.

[0042] Table 2: Twin-screw extrusion process

[0043]

Embodiment 2

[0045](1) Raw materials are weighed in parts by weight: polypropylene 74, elastomer 3, graft monomer 3, initiator 0.5, antioxidant 0.5, other additives 1;

[0046] (2) Polypropylene, elastomer, graft monomer, initiator, antioxidant and other auxiliary agents are placed in a high mixer and mixed for 10 minutes;

[0047] (3) Put the material into the twin-screw extruder, control the feeding speed, and feed glass fiber into the extruder through the side feeding port; control the number of glass fibers and feeding speed, and control the glass fiber content to 20%. For granulation, the rotational speed of the twin-screw machine is 300 rpm; the twin-screw extrusion process is listed in Table 2.

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Abstract

The invention relates to a low-fiber-floating glass-fiber-reinforced toughening polypropylene composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 30-80 parts of polypropylene, 10-60 parts of glass fiber, 3-12 parts of elastomer, 1-5 parts of grafted monomer, 0.2-1 part of initiator, 0.2-1 part of antioxidant and 0.2-2.0 parts of other assistant. Compared with the prior art, the invention prepares a polypropylene material having high strength, high rigidity and stable size under the reinforcing action of glass fiber on a high polymer material; the glass fiber has action of accelerating the crystallization of the high polymer material, and the high polymer material is quick to crystallize and cool; and the glass fiber is difficult to constrain and cover, and the elastomer can disturb the crystallization action of the polypropylene, thus preparing the low-fiber-floating reinforced toughening polypropylene composite material having high shock strength.

Description

technical field [0001] The invention relates to the technical field of polyolefins, in particular to a low-float glass fiber reinforced and toughened polypropylene composite material and a preparation method thereof. Background technique [0002] As one of the five general-purpose plastics, polypropylene PP has the advantages of low density, low production cost, good comprehensive mechanical properties, non-toxicity, corrosion resistance, easy processing and recycling, etc., and is widely used in various places, such as household appliances, automobile interior and exterior decoration Parts, fitness equipment, office supplies, daily necessities, toys, and sanitary ware, etc., occupy an important position in plastics, but when making home appliance parts, their strength, stiffness, and impact resistance often fail to meet the requirements, and the surface of the product is floating. The serious fiber also limits the application of polypropylene. At present, it is more common...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08K7/14C08F255/02B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 沈叶龙孟成铭娄小安裘浩成路海冰
Owner 上海日之升科技有限公司
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