Polyamide-based film and method for producing the same

A polyamide-based film and polyamide-based technology, applied in the direction of chemical instruments and methods, flat products, and other household appliances, can solve the problem of unsatisfactory uniformity of stretched film thickness, unsatisfactory dimensional stability, and metal foil breakage , low productivity and other issues, to achieve the effect of being beneficial to economic cost, preventing breakage, and excellent uniformity of thickness

Active Publication Date: 2022-02-25
UNITIKA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, not only the productivity is low, but also the obtained stretched film is not sufficiently satisfactory in thickness uniformity, dimensional stability, etc.
In particular, when the thickness of the film varies, and cold forming is used to process the laminated body of the film and metal foil, fatal defects such as breakage of the metal foil and pinholes may occur

Method used

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  • Polyamide-based film and method for producing the same
  • Polyamide-based film and method for producing the same
  • Polyamide-based film and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0197] The preparation itself of the melt-kneaded product may be carried out according to a known method. For example, a raw material containing at least one of a polyamide resin, an organic lubricant and an inorganic lubricant is put into an extruder equipped with a heating device, heated to a predetermined temperature and melted, and the melt kneaded by a T-die The product is extruded, cooled and solidified with a casting drum or the like, thereby obtaining an unstretched sheet as a sheet-shaped molded product.

[0198] The order of adding the polyamide resin, organic lubricant, inorganic lubricant, etc. is not particularly limited. Furthermore, the average thickness of the unstretched sheet is not particularly limited, but it is usually about 15 to 250 μm, and particularly preferably 50 to 235 μm. By setting it in such a range, a stretching process can be implemented more efficiently.

[0199] stretching process

[0200] In the stretching step, the unstretched sheet is s...

Embodiment 1

[0233] (1) Manufacture of polyamide film

[0234] First, the ingredients shown in Table 1 were used as raw materials.

[0235] [Table 1]

[0236]

[0237] Using the above raw materials, polyamide resin (polyamide 6 resin) / polyamide resin containing silica / polyamide resin containing organic lubricant = 91.5 parts by mass / 2.5 parts by mass / 6.0 parts by mass during extrusion After melting and kneading in the machine, it was supplied to a T-die and discharged into a sheet form, wound up on a metal drum whose temperature was adjusted to 20° C., cooled and wound up to produce an unstretched sheet. At this time, the supply amount of the polyamide resin and the like were adjusted so that the thickness of the polyamide-based film obtained after stretching was 12 μm.

[0238] Next, the resulting unstretched sheet is subjected to a stretching step by sequential biaxial stretching. More specifically, by using figure 2 The apparatus shown is implemented by stretching TD with a tent...

Embodiment 2～40

[0244] Embodiment 2~40, comparative example 1~20

[0245] In addition to changing the production conditions and the target thickness of the polyamide-based film after stretching to those shown in Tables 2 to 4, and changing the composition ratio of the raw materials so that the content of the organic lubricant or inorganic lubricant is as shown in Tables 8 to 10 In addition, a polyamide-based film was obtained in the same manner as in Example 1. Using the obtained polyamide-based film, a laminate was produced in the same manner as in Example 1. Among them, Embodiment 7, Embodiment 17, and Embodiment 38 are more specifically modified as follows.

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Abstract

The present invention provides a polyamide-based film that is excellent in thickness uniformity, can effectively suppress variations in physical properties in the four directions described above, and is also excellent in sliding properties, and a method for producing the same. A polyamide-based film, which satisfies all of the following characteristics (1) to (3): when a specific direction is 0 degrees from an arbitrary point in the film and rotated clockwise by 45 degrees with respect to the direction, 4 degrees, 90 degrees and 135 degrees, the difference between the maximum value and the minimum value of each stress at 5% elongation based on the uniaxial tensile test is 35 MPa or less; (2) in the four directions, based on The difference between the maximum value and the minimum value of each stress at 15% elongation in the uniaxial tensile test is 40 MPa or less; and (3) the dynamic friction coefficient is 0.60 or less.

Description

technical field [0001] The present invention relates to a novel polyamide-based film and a method for producing the same. Moreover, this invention relates to the laminated body and container which contain the said polyamide-type film. Background technique [0002] Various resin films are formed into various products such as packages by performing various processes. For example, a vinyl chloride film is used for packages (blister packs; press through packages) of pharmaceuticals (tablets) and the like. Also, for example, a polypropylene film is used when packaging contents requiring moisture resistance. In recent years, from the viewpoint of maintaining the quality of the contents, for the purpose of imparting more excellent gas barrier properties or moisture resistance, laminates in which metal foil is laminated on a resin film have been used. layer (resin film) / metal foil layer (aluminum foil) / sealant layer. [0003] In the industrial field, metal cans have been the mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18B29C48/00B29C55/14B32B15/088B65D30/02B65D65/40H01M50/124H01M50/121B29L7/00B29L9/00B29K77/00H01M50/107
CPCB32B15/088B29C55/14B65D65/40C08J5/18B29C48/00Y02E60/10H01M50/107
Inventor 松本真实
Owner UNITIKA LTD
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