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High-dipping-degree long glass fiber reinforced polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, applied in the field of online high-impregnation long glass fiber reinforced polypropylene composite material and its preparation, can solve the problem of not being able to meet the large-scale production requirements of long glass fiber reinforced polypropylene composite material On-line continuous production of agglomeration defects, inability to realize on-line continuous production, etc., to achieve the effect of improving impact strength, reducing agglomeration defects, and increasing production capacity

Inactive Publication Date: 2019-01-22
ZHEJIANG PRET NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of glass fiber in the prepared materials is as low as 5-10 parts. The glass fiber of this kind of material with low glass fiber content is easy to be completely impregnated, and the probability of agglomeration defects is small. One of the components of the treatment liquid used is Potassium nitrate is prone to explosion if it meets organic matter at high temperature. At the same time, it can not achieve online continuous production after pretreatment of glass fiber. In summary, this method is not suitable for industrial continuous production
[0005] None of the above existing technologies can achieve online continuous production while solving the agglomeration defect, and cannot meet the current large-scale production requirements for long glass fiber reinforced polypropylene composite materials

Method used

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  • High-dipping-degree long glass fiber reinforced polypropylene composite material and preparation method thereof
  • High-dipping-degree long glass fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1): Glass fiber surface treatment: Mix 60wt% concentrated sulfuric acid, 20wt% nitric acid, 5wt% potassium permanganate and 15% hydrogen peroxide to prepare a solution and put it into a special solution pool with a size of 1000mm*800mm*500mm. Continuous glass fiber The continuous glass fiber enters the water pool after passing through the solution pool to remove the residual solution, and then enters the impregnation tank with polypropylene melt;

[0028] 2): Weigh 83.2 parts of raw material polypropylene resin according to the weight ratio, and dry in an oven; add 3 parts of compatibilizer, 3 parts of toughening agent, 0.3 part of antioxidant, 0.5 part of lubricant and stir in a high-speed machine Mix evenly, and then enter the impregnation tank through the twin-screw extruder;

[0029] 3): The continuous glass fiber is drawn, cooled, pelletized and dried after passing through the dipping tank.

Embodiment 2

[0031] 1): Glass fiber surface treatment: Mix 60wt% concentrated sulfuric acid, 20wt% nitric acid, 5wt% potassium permanganate and 15% hydrogen peroxide to prepare a solution and put it into a special solution pool with a size of 1000mm*800mm*500mm. Continuous glass fiber The continuous glass fiber enters the water pool after passing through the solution pool to remove the residual solution, and then enters the impregnation tank with polypropylene melt;

[0032] 2): Weigh 73.2 parts of raw material polypropylene resin according to the weight ratio, and dry in an oven; add 3 parts of compatibilizer, 3 parts of toughening agent, 0.3 part of antioxidant, 0.5 part of lubricant and stir in a high-speed machine Mix evenly, and then enter the impregnation tank through the twin-screw extruder;

[0033] 3): The continuous glass fiber is drawn, cooled, pelletized and dried after passing through the dipping tank.

Embodiment 3

[0035] 1): Glass fiber surface treatment: Mix 60wt% concentrated sulfuric acid, 20wt% nitric acid, 5wt% potassium permanganate and 15% hydrogen peroxide to prepare a solution and put it into a special solution pool with a size of 1000mm*800mm*500mm. Continuous glass fiber The continuous glass fiber enters the water pool after passing through the solution pool to remove the residual solution, and then enters the impregnation tank with polypropylene melt;

[0036] 2): Weigh 63.2 parts of raw material polypropylene resin according to the weight ratio, and dry in an oven; add 3 parts of compatibilizer, 3 parts of toughening agent, 0.3 part of antioxidant, 0.5 part of lubricant and stir in a high-speed machine Mix evenly, and then enter the impregnation tank through the twin-screw extruder;

[0037] 3): The continuous glass fiber is drawn, cooled, pelletized and dried after passing through the dipping tank.

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Abstract

The invention discloses a high-dipping-degree long glass fiber reinforced polypropylene composite material and a preparation method thereof, and the high-dipping-degree long glass fiber reinforced polypropylene composite material is prepared from the following raw materials in parts by weight: 30-90 parts of polypropylene resin, 10-60 parts of glass fiber, 1-10 parts of a compatilizer, 1-10 partsof a flexibilizer, 0.1-1 part of an antioxidant and 0.2-2 parts of a lubricant. The glass fiber directly enters an impregnation tank for production after being treated by a treatment liquid on line. Compared with a common long glass fiber reinforced polypropylene composite material in the current market, the high-dipping-degree long glass fiber reinforced polypropylene composite material disclosedby the invention is greatly improved in tensile strength, tensile modulus, impact strength and the like, the glass fiber is high in dipping degree in polypropylene, the glass fiber is completely dispersed, and the occurrence ratio of the agglomeration defects of the glass fiber on the surface of the finished product is greatly reduced. In addition, the glass fiber is added in an online continuousmode, so that the energy consumption is greatly reduced, and the productivity is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a long glass fiber reinforced polypropylene composite material capable of high impregnation degree online and a preparation method thereof. Background technique [0002] Polypropylene resin is a general-purpose plastic with a wide range of applications. It is one of the lowest-density varieties among all plastics. It has the advantages of good formability and chemical resistance. However, polypropylene resin has a large shrinkage rate and it is difficult to meet the requirements for size. It has high requirements for parts, and its mechanical properties are not as good as engineering plastics, so it cannot be used as a structural part. Glass fiber has many excellent properties such as high mechanical strength, good heat resistance and strong corrosion resistance, and is widely used in electronic equipment, building materials, sports equipment, aircraft and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K9/02C08K7/14C08J5/08
CPCC08J5/08C08J2323/12C08J2451/06C08K7/14C08K9/02
Inventor 张中伟焦高健马波邱学熊陈永东周文
Owner ZHEJIANG PRET NEW MATERIALS
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