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Laser-marked glass-fiber reinforced polypropylene composite as well as preparation method and application thereof

A technology of polypropylene composition and laser marking, which is applied in the field of polypropylene composition, can solve the problems of expensive laser marking agent, environmental pollution, and inability to mark polypropylene materials, and achieve the effect of low product cost

Active Publication Date: 2012-07-25
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN2007100646.1 discloses a laser-markable polypropylene composition and its preparation method. The polypropylene composition of the invention can solve the problem that the polypropylene material cannot be marked and the amount of marking agent added is too much by using powder rubber. The problem
[0005] The above-mentioned patents all use the use of laser marking agents to significantly improve the laser marking effect of polypropylene, but the price of laser marking agents is expensive, and most of the laser marking agents are some organic or inorganic metal oxides. The environment causes certain pollution; in addition, because glass fibers cannot be marked, glass fiber reinforced polypropylene compositions are often difficult to implement laser marking, which greatly limits the application range of polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The components and mass percentages of the laser-markable glass fiber reinforced polypropylene composition described in this embodiment are shown in Table 1:

[0040] Among them, the melt flow rate (MFR) of homopolypropylene is 10g / 10min, and the melt flow rate (MFR) of copolymerized polypropylene is 30g / 10min; the elastomer is a copolymer of ethylene-α-olefin, and its density is 0.870g / cm 3 , its melt mass flow rate is 1.0g / 10min (2.16kg, 190°C), and the carbon number of α-olefin is 4.

[0041] Its preparation process is as follows:

[0042] Mix the above-mentioned components (except glass fiber) in a high-speed mixer in proportion, the mixing time is 0.5min, and then feed through the main feeding port of the twin-screw extruder, and the glass fiber is fed at the side feeding port , melted and kneaded at 200° C. for 0.5 min, with a screw length-to-diameter ratio of 42, extruded, water-cooled, air-dried, and pelletized to 2 mm to obtain a laser-markable glass fiber-rein...

Embodiment 2

[0044] The components and mass percentages of the laser-markable glass fiber reinforced polypropylene composition described in this example are shown in Table 1: the melt flow rate (MFR) of the homopolypropylene is 40g / 10min, where The melt flow rate (MFR) of the copolymerized polypropylene is 60g / 10min; the elastomer is a copolymer of ethylene-α-olefin, and its density is 0.850g / cm 3 , its melt mass flow rate is 0.5g / 10min (2.16kg, 190°C), and the carbon number of α-olefin is 2.

[0045] Its preparation process is as follows:

[0046] The above-mentioned components (except glass fiber) are mixed in a low-speed mixer in proportion, and the mixing time is 60 minutes, and then fed through the main feeding port of the reciprocating single-screw extruder, and the glass fiber is fed at the side feeding port , melted and kneaded at 250°C for 5 minutes, the screw length-to-diameter ratio was 66, extruded, water-cooled, air-dried, and pelletized to 1mm to obtain a laser-markable glas...

Embodiment 3

[0048] The laser-markable glass fiber reinforced polypropylene composition described in this example, its components and mass percentages are shown in Table 1: the melt flow rate (MFR) of the homopolypropylene is 60g / 10min, and the copolymerization The melt flow rate (MFR) of polypropylene is 10g / 10min; the elastomer is a copolymer of ethylene-α-olefin, and its density is 0.930g / cm 3 , its melt mass flow rate is 0.2g / 10min (2.16kg, 190°C), and the carbon number of α-olefin is 10.

[0049] Its preparation process is as follows:

[0050] Mix the above-mentioned components (except glass fiber) in the internal mixer according to the proportion, the mixing time is 15min, and then feed through the main feeding port of the reciprocating single-screw extruder, and the glass fiber is fed into the side feeding port The material was melted and kneaded at 240° C. for 1 min, the screw length-to-diameter ratio was 56, extruded, water-cooled, air-dried, and pelletized to 3 mm to obtain a la...

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Abstract

The invention provides a laser-marked glass-fiber reinforced polypropylene composite which is characterized by comprising the following components in percentage by weight: 40%-80% of polypropylene resin, 5%-30% of elastomer, 5%-50% of glass fiber, 0.01%-10% of compatilizer, 0.01%-3% of black toner, and 0.01%-5% of other additives. A preparation method of the laser-marked glass-fiber reinforced polypropylene composite comprises the following steps: except the glass fiber, mixing the components except for the glass fiber in proportion and then feeding through a main feeding hole of a double-screw extruder or a reciprocating single-screw extruder; feeding the glass fiber through a side feeding hole of the extruder; fusing and mixing at the temperature of 200-280 DEG C for 0.1-5 minutes, wherein the length-diameter ratio of a screw is not less than 32-66; and then extruding and granulating, thus obtaining the laser-marked glass-fiber reinforced polypropylene composite. The laser-marked glass-fiber reinforced polypropylene composite has the advantages that the components can form light writings or patterns with strong contrast on a brunet polypropylene plastics surface, and marks do not disappear or fade after a long time under the action of mechanical, chemical or physical factors, thereby meeting the using requirements on plastic parts of industries of automobiles, household appliances, IT (information technology), office equipment, electric tools and the like; and the laser-marked glass-fiber reinforced polypropylene composite has the advantages of low cost, environmental conservation and strong environmental friendliness.

Description

technical field [0001] The invention relates to a polypropylene composition, in particular to a laser-markable glass fiber reinforced polypropylene composition, a preparation method and application thereof. Background technique [0002] In recent years, laser marking technology has been widely used in the marking and decoration of plastic products. Compared with traditional marking methods such as inkjet coding, laser marking technology has the advantages of not easy to erase marks, fast marking, programmable control, high degree of freedom and environmental friendliness. However, not all polymers are suitable for laser marking, such as polyolefins, because they cannot effectively absorb the corresponding wavelength of laser light to form laser marks. This greatly limits the application of laser marking technology in the field of plastics. [0003] As a general-purpose plastic, polyolefin is widely used in various industries. Among polyolefins, polypropylene is widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/08C08L51/06C08K7/14C08K3/04
Inventor 陈锐李永华刘奇祥叶南飚罗忠富杨波黄达
Owner KINGFA SCI & TECH CO LTD
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