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Continuous glass fiber reinforced polypropylene unidirectional prepreg tape and its preparation method

A unidirectional prepreg tape and glass fiber technology, applied in the field of continuous fiber reinforced thermoplastic composite materials, can solve the problems of limited selection range, complicated process, high cost, etc., and achieve the effect of improving impregnation speed and wetting ability

Active Publication Date: 2021-08-03
江苏苏能新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selection range of thermoplastic resins suitable for this technology is limited, such as only suitable for polyaryl ether ketone, polyaryl ether ketone ketone, aromatic polyetherimide; polyaryl sulfone, polyaryl sulfide , aromatic polyamide, methyl acrylate, fluorinated polymer
This is because most commonly used thermoplastic resins exist in the form of particles, and the particles have high toughness, and the process of processing from granular to powder is complicated and costly, so this technology is difficult to become a general-purpose technology
In addition, the patent application with the application number 201410198628.7 discloses the use of a thermoplastic resin suspension to pre-impregnate continuous fibers. However, the impregnated material needs to further remove the moisture in it, and the process is more complicated. If the moisture is not removed completely, the residual moisture Vaporization during the later hot-pressing composite process will easily form pores and deteriorate the performance of the composite material

Method used

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  • Continuous glass fiber reinforced polypropylene unidirectional prepreg tape and its preparation method
  • Continuous glass fiber reinforced polypropylene unidirectional prepreg tape and its preparation method
  • Continuous glass fiber reinforced polypropylene unidirectional prepreg tape and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A continuous glass fiber reinforced polypropylene unidirectional prepreg tape is prepared as follows:

[0024] (1) 20 parts by weight of polypropylene with a melt index of 80g / 10min, 5 parts by weight of polypropylene grafted zinc maleic anhydride and 0.03 parts by weight of antioxidant 1010 are mixed evenly at high speed, and added figure 1 Mix and plasticize uniformly in the twin-screw extruder 5 with medium length-to-diameter ratio of 44, extrusion temperature of 170°C, and host speed of 500r / min, and extrude the obtained polypropylene-based melt mixture to a coating roller with a constant temperature of 170°C 6 surfaces;

[0025] (2) 80 parts by weight of continuous glass fibers are pulled by the creel 1 at a speed of 6m / min, after the continuous glass fibers are flattened to a planar shape by the spreading device 2, continue to draw the planar continuous glass fibers through a constant temperature to The oven 3 at 180°C is preheated to 180°C, and then the planar ...

Embodiment 2

[0028] A continuous glass fiber reinforced polypropylene unidirectional prepreg tape is prepared as follows:

[0029] (1) Mix 30 parts of polypropylene with a melt index of 20g / 10min, 1 part of polypropylene grafted zinc maleic anhydride and 0.07 part of antioxidant 1010 at high speed, and add figure 1 Mix and plasticize uniformly in the twin-screw extruder 5 with medium length-to-diameter ratio of 44, extrusion temperature of 190°C, and host speed of 800r / min, and extrude the obtained polypropylene-based melt mixture to a coating roller with a constant temperature of 190°C 6 surfaces;

[0030] (2) 70 parts of continuous glass fibers are pulled by the creel 1 at a speed of 8m / min, after the continuous glass fibers are flattened to a flat shape by the spreading device 2, continue to pull the flat continuous glass fibers through the constant temperature to 200 The oven 3 at ℃ is preheated to 200 ℃, and then the planar continuous glass fiber is pulled through the corona chargin...

Embodiment 3

[0033] A continuous glass fiber reinforced polypropylene unidirectional prepreg tape is prepared as follows:

[0034] (1) Mix 25 parts of polypropylene with a melt index of 50g / 10min, 3 parts of polypropylene grafted zinc maleic anhydride and 0.05 part of antioxidant 1010 at high speed, and add figure 1 Mix and plasticize uniformly in the twin-screw extruder 5 with medium length-to-diameter ratio of 44, extrusion temperature of 180°C, and host speed of 650r / min, and extrude the obtained polypropylene-based melt mixture to a coating roller with a constant temperature of 185°C 6 surfaces;

[0035] (2) 60 parts of continuous glass fibers are pulled by the creel 1 at a speed of 4m / min, after the continuous glass fibers are flattened to a flat shape by the spreading device 2, continue to pull the flat continuous glass fibers through the constant temperature to 190 The oven 3 at ℃ is preheated to 190 ℃, and then the planar continuous glass fiber is pulled through the corona chargi...

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Abstract

The invention discloses a method for preparing a continuous glass fiber reinforced polypropylene unidirectional prepreg tape, comprising: 1) uniformly mixing polypropylene, a polypropylene-based ionomer and an antioxidant, heating and melting to obtain a melt mixture; 2) The continuous glass fiber is drawn out from the creel, flattened, and then enters the corona charging device, so that the continuous glass fiber is charged with the opposite charge to the polymer chain of the polypropylene-based ionomer; 3) after being treated in step 2) The continuous glass fiber is coated with melt mixture, kneaded and impregnated, calendered and impregnated, cooled and shaped, and rolled. The invention also discloses the continuous glass fiber reinforced polypropylene unidirectional prepreg tape prepared by the method. The product prepared by the invention has the characteristics of sufficient impregnation of polypropylene to continuous glass fiber, low porosity, good interface bonding, excellent mechanical properties, and no release of small molecule volatiles during subsequent processing and use, and can be used for continuous fiber reinforced polypropylene Sheet, plate and special-shaped structural parts and other fields.

Description

technical field [0001] The invention belongs to the technical field of continuous fiber-reinforced thermoplastic composite materials, and in particular relates to a continuous glass fiber-reinforced polypropylene unidirectional prepreg tape and a preparation method thereof. Background technique [0002] Continuous fiber-reinforced thermoplastic composites have excellent comprehensive performance, no chemical reaction during processing, short molding cycle, no storage conditions for prepreg materials, convenient use, wide operating temperature, low water absorption, simplified molding process of parts, manufacturing The outstanding advantages of low cost, recyclable waste materials, emission reduction and environmental protection have been quickly recognized by the global market. Continuous fiber reinforced thermoplastic composites can replace many materials such as die castings, metal assemblies, and traditional plastics in markets including industrial equipment, automotive,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08K9/00C08K7/14C08J5/08
CPCC08J5/08C08J2323/12C08J2451/06C08K7/14C08K9/00
Inventor 张大松毛建群闫东广张斌肖龙生
Owner 江苏苏能新材料科技有限公司
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