PANASONIC CORPORATION (Osaka, JP)

With the help of wide-angle Xray diffraction measurements the polypropylene-molded object has a crystallinity level of at less than 48 percent. The polypropylene-molded article has half-widths of the orientation of a peak in the azimuth distribution as measured using wide-angle X-ray scattering measurements. This measurement is 5.5.degree. or less, and the length period of the polypropylene molded article obtained by small-angle X-ray scattering measurement is 12 nm or greater and 16 nm or less.

1. Field of the Invention

This disclosure relates to the polypropylene-molded object and a manufacturing procedure for the polypropylene-molded item.

2. Description of the Related Art

Plastics like polyethylene (PE), plasticpropylene(PP) and polystyrene/PS. Polyvinyl chloride [PVC] as well as others. are inexpensive and can be purchased for as low as 100 yen per kilogram. Because they’re lighter than ceramics and metals, commodity plastics are simple to mold. Common plastics are utilized in a range of household products, including bags sheets containers, bags, and packaging. They also serve as industrial parts , like electric parts, auto parts, daily commodities, and various other items.

But, they do have disadvantages, such as a lack of mechanical strength. In the present, commodities plastics do not possess the required characteristics to be utilized in various industrial products, including automobiles and electronic, electrical, and related products. The range of applications for commodity plastics is thus limited.

Therefore, the properties of materials (mechanical strength, etc.) The physical properties (mechanical strength and mechanical strength, etc.) of common plastics can be enhanced. With improved material properties, commodity plastics can be used as alternatives for engineering plastics or metal products, and the price of manufacturing different metal or polymer industrial and household items are reduced.

Among commodity plastics that are used in the manufacturing process, polypropylene with its high mechanical strength is regarded as a promising material and the rate of growth in the annual production of polypropylene is constant at a rate of a few percent. Polypropylene’s monomer recycling being simple allows for a perfect recycling. This means that carbon dioxide can be generated and petroleum fuels such as oil like gasoline are reduced.

International Publication Nos. 1 3, and 3. Patent Literature 1 through 3. 2007/0268323, 2010/084750 and 2008/108251) describe a method to make an extremely molecular, oriented crystal like polypropylene. The method involves stretching a melting polymer to an equal or greater critical elongational rate to prepare an orientation melt. The melting process of crystallization of an oriented polymer is also possible, while the condition of the orientedmelted remains.

The high-molecular-oriented crystal created by the method disclosed in Patent Literatures 1, 2, and 3 has a fracture strength of 240 MPa at maximum. This fracture strength is smaller than the fracture strength of a metal like copper. Thehigh-molecular oriented crystal does not have sufficient mechanical strength.

A non-limiting, exemplary embodiment provides a polypropylene molded product with mechanical strength higher than that of the related art.

The specification and Figures will disclose additional advantages and advantages. The benefits and/or advantages may be provided in a variety of ways through the various embodiments and features of the specification anddrawings disclosure, but they need not all be described to get some or all of the same.

An embodiment of the disclosure comprises a polypropylene molded article in which a crystallinity degree obtained through wide-angle X-ray diffraction measurements is at least 48 or more, and a half-width of an orientation peak within an azimuth-angular distribution derived through wide-angle X-ray diffraction measurements is 5.5.degree. or less, and a longer time period that is obtained from small-angle X-ray scattering measurements is 12 nm or greater and less than 16 nm.

These general and specific elements can be implemented with a system and a method, and any combination of systems and methods.

In accordance with the embodiment of the disclosure an article made of polypropylene that has mechanical strength greater than that in the prior art may be offered.

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