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Polyamide resin laminate roll and process for producing the same

A polyamide-based, resin-layered technology applied in the field of high-quality film rolls to achieve excellent pinhole resistance

Active Publication Date: 2006-12-13
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention was achieved by the applicant after actively researching and developing a production technology that improves the sliding properties of polyamide resin films under high humidity without changing them. Biaxially oriented polyamide-based polyamide resin film rolls are problematic, and bag-making can be smoothly and smoothly laminated with almost no obstacles even in high-humidity environments such as summer, and biaxially oriented polyamides can efficiently obtain packages without S-curls Amide resin laminated film roll

Method used

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  • Polyamide resin laminate roll and process for producing the same
  • Polyamide resin laminate roll and process for producing the same
  • Polyamide resin laminate roll and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] Using the co-extrusion method, melt-extrude polyamide-based resins from three extruders (first to third extruders) (laminate extrusion in a die), and wind them in a rotating machine cooled to 17°C. Rapid cooling was performed on a metal roll to obtain an unstretched film (polyamide-based resin laminated sheet) having a thickness of 257 μm and two types of three-layer structures. The method of forming each layer of the unstretched film (steps up to melt extrusion) is as follows. In addition, in the following description, the surface layer of the polyamide-based resin laminated sheet is referred to as the first layer, the second layer, and the third layer in order (that is, the surface of the third layer is the metal roll contact surface).

[0158] ・Formation of the first layer (outer layer)

[0159] The above flakes A and C were pre-dried while raising the temperature to about 120° C. with a 15 kl stirring device over about 8.0 hours. A certain amount of each flake was...

Embodiment 2

[0207] For the formation of the first layer and the third layer, when the flakes A and C in each mixer are supplied to the hopper directly above the first extruder and the third extruder, the supply amount of the flake A is 99.0% by weight, The supply amount of flake C was 1.0% by weight. For the formation of the second layer, when the flakes A and C in each mixer were supplied to the hopper directly above the second extruder, the supply amount of flake A was 99.94% by weight, The supply amount of the sheet C was 0.06% by weight, and in the same manner as in Example 1, a roll of a polyamide-based resin laminated film was obtained. Then, the properties of the obtained film roll were evaluated by the same method as in Example 1. The evaluation results are shown in Tables 4-7.

Embodiment 3

[0209] When the first to third extruders melt and extrude the raw material flakes, adjust the output of the first to third extruders so that the thickness ratio of the first layer / second layer / third layer is 1 / 13 / 1 , and in the same manner as in Example 1, a polyamide-based resin laminated film roll was obtained. When the obtained biaxially stretched laminated film was sliced ​​in the thickness direction and observed with an electron microscope, the thicknesses of the first layer, the second layer, and the third layer were about 1 μm, about 13 μm, and about 1 μm, respectively. Then, the properties of the obtained film roll were evaluated by the same method as in Example 1. The evaluation results are shown in Tables 4-7.

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PUM

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Abstract

To provide a biaxially oriented polyamide resin laminate film roll that permits performing of smooth bag-making processing by laminating with high yield, enabling efficiently obtaining of a packaged matter free from S-shaped curling. There is provided a polyamide resin laminate film roll wherein in the event of disposing of a first specimen cutout portion within 2 m from film winding end and disposing of a final specimen cutout portion within 2 m from film winding startand further in the event of disposing specimen cutout portions every about 100 meters from the first specimen cutout portion, with respect to all the specimens cut out from the cutout portions, properties, such as boiling water shrinkage factor, surface roughness and refractive index along thickness direction, are regulated so as to fall within a fluctuation band of given range.

Description

technical field [0001] The present invention relates to a high-quality film roll with uniform physical properties in the longitudinal direction formed by winding a polyamide-based resin laminated film. More specifically, it relates to packaging of retort food and the like after being laminated with a polyolefin-based resin film. Polyamide-based resin laminated film roll with good processability (especially processability under high humidity). Background technique [0002] Because the biaxially oriented polyamide resin film with nylon as the main component is relatively tough, and has excellent air resistance, pinhole resistance, transparency, and printability, it is widely used in various liquid foods and water-containing foods. , Frozen food, steamed food, slurry food, livestock meat, aquatic food and other food packaging materials, especially in recent years, has been widely used in the packaging of steamed food. Such a polyamide resin film is laminated with a polyolefin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B29C69/00B29C47/04B29C55/14B29K77/00B29L9/00
Inventor 西忠嗣宫口义纪小田尚伸野濑克彦
Owner TOYOBO CO LTD
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