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High-strength environment-friendly composite material prepared from microcellular foamed polypropylene
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A composite material and microcellular foaming technology, which is applied in the field of polypropylene materials, can solve the problems that the mechanical strength cannot meet the requirements, and achieve the effects of light weight, short production process time, and high mechanical strength
Inactive Publication Date: 2020-08-07
NINGBO TUOPU GROUP CO LTD
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Problems solved by technology
However, in some fields that require high mechanical properties, such as auto parts manufacturing, its mechanical strength still cannot meet the requirements
Method used
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Embodiment 1
[0039] (1) Sprinkle powder on one side of the non-woven fabric with a gram weight of 150 grams, and then attach the non-woven fabric to the GMT sheet (thickness 1 mm, glass fiber length 50 mm) by heat treatment;
[0040] (2) Press the GMT sheet with non-woven fabric on the back and MPP (15 times the expansion ratio, 19 mm thickness) figure 1 Arrange in the order shown, and then put the material into the steam mold to carry out the steam molding process, the process parameters are shown in Table 1;
[0041] (3) Transfer the steam-molded material to the cooling mold, take it out after cooling and shaping for 50 seconds, and obtain the microcellular foamed polypropylene composite material.
Embodiment 2
[0043] (1) Sprinkle powder on one side of the non-woven fabric with a gram weight of 100 grams, and then attach the non-woven fabric to the GMT sheet (thickness 0.8 mm, glass fiber length 40 mm) by heat treatment;
[0044] (2) Press the GMT sheet with non-woven fabric on the back and MPP (10 times the expansion ratio, 14 mm thickness) figure 1 Arrange in the order shown, and then put the material into the steam mold to carry out the steam molding process, the process parameters are shown in Table 1;
[0045] (3) Transfer the steam molded material to the cooling mold, take it out after cooling and setting for 40 seconds, and obtain the microcellular foamed polypropylene composite material.
Embodiment 3
[0047] (1) Attach a non-woven fabric with a grammage of 200 grams on one side, and then attach the non-woven fabric to the GMT sheet (thickness 1.5 mm, glass fiber length 60 mm) by heat treatment;
[0048] (2) Press the GMT sheet with non-woven fabric on the back and MPP (15 times the expansion ratio, 17 mm thickness) figure 1 Arrange in the order shown, and then put the material into the steam mold to carry out the steam molding process, the process parameters are shown in Table 1;
[0049] (3) Transfer the steam-molded material to the cooling mold, take it out after cooling and shaping for 60 seconds, and obtain the microcellular foamed polypropylene composite material.
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Abstract
The invention provides a polypropylenecomposite material. The polypropylenecomposite material comprises a first non-woven fabric layer, a second non-woven fabric layer, a first GMT sheet layer, a second GMT sheet layer and MPP. The non-woven fabric is attached to the surface of the GMT sheet through single-side dusting or film pasting and heat treatment, and the non-woven fabric is also attachedto the surface of the GMT sheet through the same treatment process as the non-woven fabric; the MPP is used as a core layer of the composite material and is wrapped between the GMT sheets after beingsubjected to heat treatment; and the non-woven fabric and the non-woven fabric are completely made of the same material. The GMT sheet and the GMT sheet are also completely made of the same material;through the design, a novel recyclable environment-friendly material which is light in weight, high in strength, non-toxic, odorless and free of three wastes can be provided. The part is excellent incomprehensive performance and has wide application prospect and development potential.
Description
technical field [0001] The invention relates to the technical field of polypropylene materials, in particular to a high-strength environment-friendly microporous foamed polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene resin (PP) is a common general-purpose plastic, which has the advantages of low density, high chemical stability, high heat resistance, and easy processing and molding, so it is widely used in household appliances, automobile manufacturing and other fields. However, with the gradual improvement of the mechanical and environmental performance requirements of materials in various fields, ordinary polypropylene materials cannot continue to meet the application requirements. At present, it is more effective to use long glass fibers to strengthen the mechanical properties of polypropylene. The conventional reinforcement method is to mix long glass fibers with molten polypropylene to prepare composite mate...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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