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Polypropylene film

A polypropylene and polymer technology, applied in the field of polypropylene film and its preparation, can solve problems such as printing defects, damage to the overall appearance of the printed film, and expensive

Pending Publication Date: 2019-02-05
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of titanium dioxide has potential disadvantages
For many applications, the composition is often expensive
In addition, it has been reported that higher levels of titanium dioxide in some films can reduce the sealing properties during subsequent molding or packaging processes
In addition, high titania loading levels tend to have titania distribution problems in some films, where the titania particles gel in the film and lead to the formation of so-called "fish-eye" defects in the film
In addition, this defect can further lead to printing defects that detract from the overall aesthetics of the printed film

Method used

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Examples

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Embodiment

[0086] Figure 1a with Figure 1b The table provides details of various monolayer membranes, including membrane formulations, membrane preparation conditions, and analytical data. The films of Examples 1 to 15 are most preferred. The comparative films of Examples 16 to 24 are outside the scope of the present invention. Finally, the films of Examples 25 to 27 were controls. The control was not stretched (and thus both percent elongation and elongation were zero).

[0087] In the examples there are three different film formulations. Briefly, the first film formulation comprised 5% by weight of the monolayer film of high viscosity silicone ("HV" silicone type) and 95% by weight of the monolayer film of random copolymer polypropylene, F280M ("random" PP type) from Sinopec. The second film formulation contained the same 5% by weight of the monolayer film of high viscosity silicone ("HV" silicone type), but comprised 95% by weight of the monolayer film of a homopolymer polyprop...

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Abstract

Certain films comprising polypropylene and silicone that are uniaxially stretched at stretching temperatures below 70 DEG C have desirable aesthetic effects.

Description

technical field [0001] This application relates to certain polypropylene films and methods of making them. Background technique [0002] Flexible thermoplastic films are used in a variety of applications including construction of packaging and containers, protective films and coatings, and even wallpaper. Typical thermoplastic polymer types include polyethylene (PE), polyethylene terephthalate (PET) and polypropylene (PP). In turn, PP can exist in different grades such as homopolymers, random copolymers and impact copolymers. Films can be blown or cast and then usually stretched. Stretching can be longitudinal stretching, transverse longitudinal (ie, transverse) stretching, or biaxial stretching. Low levels of silicone can be added as slip agents, especially in high temperature film stretching processes. A film may have one or more layers. [0003] Often there is a need to provide visual aesthetics to PP films so the product or packaging is more attractive to consumers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10B32B27/00B29C49/02
CPCB32B7/04B32B7/12B32B25/04B32B25/08B32B25/16B32B27/08B32B27/16B32B27/283B32B27/306B32B27/32B32B27/36B32B2250/24B32B2264/102B32B2264/104B32B2264/108B32B2270/00B32B2307/402B32B2307/409B32B2307/41B32B2307/422B32B2307/516B32B2307/54B32B2307/546B32B2307/558B32B2307/704B32B2307/732C08J5/18C08J2323/10C08J2483/04C08L23/12C08L23/142C08L2203/16C08L2310/00G01N23/201C08L83/04C08L83/10C08L83/06B32B27/30C08F10/06C08G77/42
Inventor 潘立超程展黄旭宋硕
Owner PROCTER & GAMBLE CO