Unlock instant, AI-driven research and patent intelligence for your innovation.
Propylene polymer composition, film thereof, and multilayered laminate
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of propylene polymer and composition, which is applied in the film of food packaging material and pharmaceutical packaging material, used in the field of food, multi-layer laminate, propylene-α-olefin block copolymer composition, and can solve the problem that cannot be made People are satisfied, the heat seal part is broken, and it does not have impact strength, etc.
Inactive Publication Date: 2006-12-13
SHOWA DENKO PLASTIC PROD
View PDF6 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] Among the polypropylene-based materials that can be used as heat-sealing layers, the problem with polypropylene homopolymer is that it has poor impact resistance and is not suitable for storage at low temperatures
Moreover, even the ethylene-propylene random copolymer, which is superior in impact resistance to polypropylene, does not have satisfactory impact strength at low temperatures, and it has a problem that its films adhere to each other by heat sterilization. together or deformed, and form orange peel (irregularities on the surface of the membrane)
However, when the actual package falls, it falls at a speed of 1000mm / minute or more, so there is a problem that the heat-sealed portion is broken even if the peel strength of the heat-seal after ionizing radiation is good
[0013] However, the above-mentioned film prepared by blending the thermoplasticelastomer component with the propylene block copolymer or the ethylene-propylene random copolymer and molding the blend (see, for example, Japanese Patent Application Second Publication (kokoku) No. Hei 6-86109; Japanese Patent Application First Publication (kokai) No. Hei 7-26037; Japanese Patent Application First Publication (kokai) No. Hei 7-166024; Japanese Patent Application First Publication Publication (kokai) No. Hei 8-302110; and Japanese Patent Application First Publication (kokai) No. Hei 10-152596) have a problem that, compared with the heat seal strength before heat sterilization, Reduced heat seal strength after sterilization and orange peel formation on the film
In addition, according to studies made by the present inventors, a sealing film for retort containing a mixture of a propylene block copolymer and a polypropylene flexible resin (Japanese Patent Application First Publication (kokai) No. Hei 10-265622), also Unsatisfactory due to insufficient protection against cellulite after the retortsterilization process
Method used
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
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～10 and comparative example 1～8
[0173] From each of the pellets A to R, a film having a thickness of 80 µm was produced with a T-die forming machine (diameter 40 mmφ, die width 250 mm) manufactured by Yoshii Tekko, K.K., wherein the die temperature was 250°C.
[0174] By dry lamination, a polyester film having a thickness of 12 μm and each film obtained above were laminated together, and the laminate was heat-sealed for 1 second with a heat sealer manufactured by Tester Sangyo Co., Ltd., The temperature is 160 or 170°C, the pressure is 19.6MPa (2kgf / cm 2 ).
[0175] Using "RCS-40T" manufactured by Hisaka Works, Ltd., the heat-sealing film was subjected to retorting at 121°C for 30 minutes. The heat seal strength and heat seal impact strength were measured before and after the retort process.
[0176] In addition, the heat-sealing film was irradiated with gamma rays of 25 KGy with cobalt 60, and the heat-sealing strength, heat-sealing impact strength and orange peel before and after the retort process were ...
Embodiment 11～16 and comparative example 9～15
[0179] With Toshiba Machine Co., Ltd. manufacture, extruder diameter is 115 and 65mmφ, die head width is 3400mm, the T-die head molding machine of the feeding head type that die lip gap is 0.8mm, prepares the thickness to be 70 μm Film, the layer structure of which is listed in Table 5, and has an intermediate layer according to one of the pellets A-D, K-N and S in Table 5. The thickness ratios of the surface layer and the intermediate layer were appropriately adjusted as shown in Table 5.
[0180] By dry lamination, a polyester film with a thickness of 12 μm and each film obtained above were laminated together, and the laminate was heat-sealed for 1 second with a heat sealer manufactured by Tester Sangyo Co., Ltd. It is 160 or 170°C, and the pressure is 19.6MPa (2kgf / cm 2 ).
[0181] The film heat-sealed as above was subjected to retorting at 121°C for 30 minutes using "RCS-40T" manufactured by Hisaka Works, Ltd. Heat seal strength and blanching resistance were determined ...
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
Login to View More
PUM
Property
Measurement
Unit
thickness
aaaaa
aaaaa
thickness
aaaaa
aaaaa
Login to View More
Abstract
The invention provides a resin composition, film thereof, and multilayered laminate, suitable as food packaging materials and medical packaging materials. The resin composition is a propylene polymer composition which (1) when examined with a differential scanning calorimeter, gives a crystallizationtemperature curve which has a primary crystallization peak temperature (TCP1) of 105 to 110 DEG C. and a secondary crystallization peak temperature (TCP2) of 65 to 85 DEG C. and in which the proportion of the area of the secondary crystallization peak (TCA2) to that of the primary crystallization peak (TCA1), AR, is 4.0% or lower, (2) has a 25 DEG C. xylene-soluble content (XI) of 10 to 30 wt.%, and (3) satisfies the relationship TCP2 C08L 53 / 00 C08J 5 / 18 B32B 27 / 32 3 26 0 2000 / 8 / 4 1425041 2003 / 6 / 18 1289599 2006 / 12 / 13 2006 / 12 / 13 2006 / 12 / 13 Showa Denko Plastic Products Co., Ltd. Japan Watanabe Kazuyuki Yanai Junichi gui yongliang liu jinhui 11247 Japan 2000 / 1 / 26 21720 / 00 2002 / 7 / 24 PCT / JP2000 / 005244 2000 / 8 / 4 WO2001 / 055258 2001 / 8 / 2 Japanese
Description
technical field [0001] The present invention relates to a specific propylene polymer composition. More specifically, the present invention relates to a propylene-α-olefin block copolymer composition, and a film made of it suitable for food packaging materials and pharmaceutical packaging materials, wherein the heat caused by heat sterilization such as retort sterilization The reduction in seal strength is limited to a low level, the composition has good low temperature impact strength, and has good radiation resistance. [0002] Furthermore, the present invention relates to a multilayer laminate comprising a propylene-α-olefin block copolymer composition and a specific propylene polymer composition. More specifically, the present invention relates to a multi-layer laminate suitable for use in food packaging materials and pharmaceutical packaging materials, and especially as a heat-sealing layer in packaging materials, wherein the heat-sealed layer due to heat sterilization su...
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
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More