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Packaging body of polyvinyl alcohol film roll

A packaging body and film technology, applied in packaging, transportation and packaging, containers to prevent mechanical damage, etc., can solve the problems of low productivity and easy cutting of polarizing film polarizers, and achieve the goal of preventing and inhibiting injuries. Effect

Active Publication Date: 2017-06-20
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even if there is a slight scratch on the PVA film, cutting will occur starting from this point, and there is a problem that the yield (product yield) and productivity of the polarizing film and the polarizing plate are likely to decrease.
In particular, PVA film is usually stored or transported in the form of a roll formed by winding up a long PVA film, but if there is damage on the end surface of the roll, it may be easily cut during uniaxial stretching of the PVA film. The problem

Method used

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  • Packaging body of polyvinyl alcohol film roll
  • Packaging body of polyvinyl alcohol film roll
  • Packaging body of polyvinyl alcohol film roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] (1) A PVA film with a width of 400 cm, a thickness of 75 μm, and a length of 10,000 m (the degree of polymerization of PVA is 2400, the degree of saponification of PVA is 99.9 mol%, the content of glycerin is 11% by mass, and the moisture content is 4.0% by mass) is wound up to a length of 450 cm and a diameter of 6 Inch cylindrical aluminum core to get rolls. At this time, the core was wound up so that the core protruded 25 cm from each end surface of the roll. The resulting roll had a diameter of 115 cm. Visually observing the end surface and outer peripheral surface of the roll, no damage was observed.

[0097] (2) On both end faces of the above-mentioned roll, as foam cushioning materials, one foamed polyethylene sheet with a thickness of 5 mm was cut out in accordance with the shape of the end faces of the roll. The foamed polyethylene sheet is an independent cell type with an expansion ratio of 10 times, and the water absorption rate is 0.01g / cm 2 , 25% compres...

Embodiment 2

[0108] (1) A PVA film with a width of 440 cm, a thickness of 60 μm, and a length of 12,500 m (the degree of polymerization of PVA is 2400, the degree of saponification of PVA is 99.9 mol%, contains 11% by mass of glycerin, and the moisture content is 4.0% by mass) is wound up to a length of 480 cm and a diameter of 6 Inch cylindrical iron core to get rolls. At this time, the core was wound up so that the core protruded 20 cm from each end surface of the roll. The resulting roll had a diameter of 122 cm. Visually observing the end surface and outer peripheral surface of the roll, no damage was observed.

[0109] (2) On both end faces of the above-mentioned roll, as foam cushioning materials, one foamed polyethylene sheet with a thickness of 10 mm was cut out in accordance with the shape of the end faces of the roll. The foamed polyethylene sheet is an independent cell type with an expansion ratio of 20 times, and the water absorption rate is 0.03g / cm 2 , 25% compressive stre...

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Abstract

A packaging body is a packaging body that wraps a roll of a PVA film (2) with a packaging film (4), and has the following structure: on both ends (5) of the packaging body, from the inside of the packaging body A foam buffer (7), a packaging film (4) and a protection pad (9) are sequentially disposed toward the outside. With this structure, damage to the PVA film roll during storage and transportation can be sufficiently prevented, and cutting during uniaxial stretching can be reduced.

Description

technical field [0001] The present invention relates to a package obtained by wrapping a roll wound with a polyvinyl alcohol film with a packaging film, a method for producing the package, and a method for storing or transporting the roll. Background technique [0002] A polarizing plate having a function of transmitting and shielding light, together with a liquid crystal having a function of switching light, is a basic component of a liquid crystal display (LCD). The field of application of this LCD has expanded from small devices such as desktop computers and watches in the early days of development to notebook computers, liquid crystal displays, liquid crystal color projectors, liquid crystal televisions, car navigation systems, mobile phones, and indoor and outdoor use. Various fields such as measuring equipment. On the other hand, especially in the field of liquid crystal televisions, the price is rapidly falling, and the improvement of the yield rate (product yield ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D85/672B65D81/107
CPCB65D81/02B65D85/672
Inventor 朝田秀日笠慎太郎矶崎孝德
Owner KURARAY CO LTD
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