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Method for manufacturing polyamide resin laminated film roll

一种聚酰胺类、制造方法的技术，应用在聚酰胺类树脂层压薄膜卷的制造领域，能够解决不能显现滑动性、未必加工特性等问题，达到透明性优良、结晶度低、耐针孔性优良的效果

Inactive Publication Date: 2010-12-08
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if it is a polyamide resin film roll with highly uniform physical properties as described above, when the lamination process is performed under high humidity such as in summer, the polyamide resin laminated film may not be well developed on the roll of the laminating machine. Slidability, may not be able to obtain good processing characteristics

Method used

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  • Method for manufacturing polyamide resin laminated film roll
  • Method for manufacturing polyamide resin laminated film roll
  • Method for manufacturing polyamide resin laminated film roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0187] Polyamide-based resins are melt-extruded from three extruders (first to third extruders) by co-extrusion (extrusion after lamination in a die), and wound into a machine cooled to 17°C. The unstretched film (polyamide-based resin laminated sheet) of two types of three-layer structures having a thickness of 257 μm was obtained by cooling rapidly on a rotating metal roll. 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 order from the surface layer of the polyamide-based resin laminated sheet is the first layer, the second layer, and the third layer (that is, the surface of the third layer is the contact surface of the metal roll).

[0188] ・Formation of the first layer (outer layer)

[0189] Using a 15 kl mixing device (Prender-device), predrying was carried out while heating the chips A and C above to about 120° C., respectively, for about 8.0 hours. A predetermined amoun...

Embodiment 2

[0238] Except that the drawing speed of the sheet in the molten state was changed to 75 m / min, and the heat-setting temperature after biaxial stretching was changed to about 216°C, the operations were carried out in the same manner as in Example 1 to obtain a polyamide-based resin laminated film. roll. 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 5-8.

Embodiment 3

[0240] Except when forming the first layer and the third layer, when the chips 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 chip A is set to Set at 99.0% by weight, set the feed rate of chips C to 1.0% by weight, and at the same time, when forming the second layer, supply the chips A and C in each mixer to the hopper directly above the second extruder In this case, except that the supply amount of chip A was set to 99.94% by weight, and the supply rate of chip C was set to 0.06% by weight, the operation was carried out in the same manner as in Example 1 to obtain a polyamide-based resin laminated film roll. 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 5-8.

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Abstract

This invention provides a process for efficiently producing a biaxially oriented polyamide resin laminated film roll that can realize bag making by lamination with high efficiency at high yield even under high humidity conditions. The production process of a film roll comprises a melt extrusion-cooling step of melt extruding a polyamide resin onto the surface of a movable cooling material into a sheet form and cooling the extrudate to form an unstretched sheet, a biaxially stretching step of biaxially stretching the unstretched sheet in longitudinal and transverse directions, and a winding step of winding the biaxially stretched film into a roll form. In the melt extrusion-cooling step, in melt extrusion-cooling of the polyamide resin on the movable cooling material surface, corona discharge in a streamer corona state is carried out between an electrode, to which a direct current high voltage has been applied, and the polyamide resin laminated sheet in a melted state to impart, to thepolyamide resin laminated sheet in a melted state, charges sufficient for adhesion to the movable cooling material surface.

Description

technical field [0001] The present invention relates to a method for producing a film roll obtained by winding a high-quality polyamide-based resin laminated film with uniform physical properties in a long dimension with high productivity, and in particular relates to a method for producing a polyamide resin laminated film with polyolefin Resin film lamination, a method for producing a polyamide-based resin laminated film roll with good processability (especially processability under high humidity) when used for packaging retort foods and the like. Background technique [0002] Biaxially oriented polyamide-based resin films with nylon as the main component are widely used in various liquid foods and water-containing foods due to their toughness, excellent gas barrier properties, pinhole resistance, transparency, and printability. , Frozen food, distilled food, paste food, livestock meat, aquatic food and other food packaging materials, especially in recent years, has been wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/02B29C47/06B29C47/56B29C55/12B29C55/14B29C71/04B29C71/02B65D65/40B29K77/00B29K23/00B29L9/00B29C48/08B29C48/305
CPCB29C47/887B29C55/12B29C47/8845B29C55/065B29C47/0021B29K2077/00B29C59/10B29C55/143B29C48/08B29C48/914B29C48/9165B29C31/02
Inventor 西忠嗣长田敏文宫口义纪小田尚伸野濑克彦
Owner TOYOBO CO LTD
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