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A shallow sink mark reinforced polypropylene material and its preparation method

A polypropylene material and polypropylene technology, which is applied in the field of shallow sink mark reinforced polypropylene materials and their preparation, can solve the problems of insufficient compensation for the thick-walled parts of the parts, restrictions on the use of polypropylene materials, slow cooling and solidification speed, etc. , to achieve the effect of improving the compression packing effect, offsetting the volume shrinkage and improving the surface quality

Active Publication Date: 2017-11-07
苏州润佳高分子材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the slow cooling and solidification speed of the polypropylene material after injection molding, there are positions where the thickness of the part changes, and sink marks are prone to occur. Sink marks refer to local depressions formed on the surface of the part. Thicker areas, ribs, or backsides of protrusions, resulting from insufficient compensation of thick-walled parts of the part as they cool
This surface defect seriously affects the appearance of the product and is still visible after spraying, which greatly limits the use of polypropylene materials in appearance parts

Method used

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  • A shallow sink mark reinforced polypropylene material and its preparation method
  • A shallow sink mark reinforced polypropylene material and its preparation method

Examples

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Embodiment 1-3

[0022] See Table 1 for the components and mass percentage ratios of Examples 1-3. The preparation method includes steps: (1) drop each component into a high-speed mixer according to the ratio and stir evenly, and then extrude and granulate through an extruder to obtain Plastic masterbatch; (2) Add the plastic masterbatch obtained in step (1) into an injection molding machine for injection molding to obtain the desired product.

[0023] Wherein, the polypropylene used in Examples 1-3 is a homopolypropylene with a melt index of 25-50 g / 10 min under a load of 2.16 Kg at a temperature of 230°C. Nylon resins are semi-crystalline polyamides formed by condensation of aliphatic dicarboxylic acids and aliphatic diamines containing 4 to 12 carbon atoms. The organoclay is organic ammonium modified smectite organoclay, the outer shell of the expanded microspheres is an acrylonitrile copolymer, the inner foaming agent is isopentane, and the average particle size of the expanded microsphere...

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Abstract

The invention discloses a shallow-sink-mark reinforced polypropylene material and a preparing method thereof. The shallow-sink-mark reinforced polypropylene material is prepared from, by mass, 50%-70% of polypropylene, 5%-20% of nylon resin, 1%-5% of maleic-anhydride-grafted POE, 1%-5% of compatilizer, 5%-15% of K resin, 15%-25% of expansion microballoons and 1%-3% of organic clay. The surface of the product is high in quality, smooth, flat and resistant to sink marks and scratching, the product is high in strength, and application to appearance products such as domestic appliances and automobiles with higher appearance requirements can be achieved.

Description

technical field [0001] The invention relates to a shallow sink mark reinforced polypropylene material and a preparation method thereof. Background technique [0002] As an environmentally friendly material, polypropylene resin is rapidly expanding its use. However, due to the slow cooling and solidification speed of the polypropylene material after injection molding, there are places where the thickness of the product changes, and sink marks are prone to occur. Sink marks refer to local depressions formed on the surface of the product. Thicker areas, ribs, or backsides of protrusions result from insufficient compensation of thick-walled parts of the part as they cool. This surface defect seriously affects the appearance of the product, and it is still visible after spraying, which greatly limits the use of polypropylene materials in appearance parts. [0003] Studies have shown that the formation of sink marks is not only related to product design, mold design, molding pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L77/06C08L51/06C08L47/00C08K9/04C08K3/34C08J9/14
CPCC08J9/141C08J2323/12C08J2477/06C08L23/12C08L2203/14C08L2205/035C08L77/06C08L51/06C08L47/00C08K9/04C08K3/346
Inventor 汪理文董骏周明翁永华丁贤麟
Owner 苏州润佳高分子材料有限公司
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