JP2010163189A - High polymer film rolled packaging member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high polymer film rolled packaging member in which an end part of the roll having a film composed of high polymer of high moisture absorbing characteristic such as polyester or polyamide is prevented from absorbing moisture in atmosphere and being bulged out and the trouble of frill-like looseness generated due to a more elongation of the end part of the film as compared with that of its central part is improved. <P>SOLUTION: There is provided a high polymer film rolled packaging member, wherein the high polymer film roll wound on a paper mandrel with a water content being less than 0.5 wt.% is packaged with a moisture-releasing film. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a package in which a film made of a highly hygroscopic polymer such as polyester or polyamide is wound around a winding core to form a roll.

When a film made of a relatively hygroscopic polymer such as polyester or polyamide is rolled up into a roll, the end part absorbs moisture in the atmosphere and expands, making it longer than the central part that does not absorb moisture May cause troubles that fluffy. For this reason, a method of preventing moisture intrusion by winding a moisture-proof film having an aluminum foil or an aluminum vapor deposition layer around a film roll is generally adopted, but in recent years, there has been a strong demand for the film not to be loose. Therefore, the level of looseness of the film due to moisture in the space enclosed by the moisture-proof film is also becoming a problem. Therefore, a moisture absorbent is provided on the inside of the moisture-proof film to remove moisture inside the film. Although a method for improving it has been proposed, in applications where the use of foreign substances is extremely hated, such as optical applications and electronic parts, these hygroscopic agents may cause foreign substances, so a large amount of hygroscopic agent is applied. It was not possible to achieve a sufficient effect.

  There has also been proposed a method in which a film is formed into a roll and then provided with a drying step before processing to remove moisture inside the film.

JP-A-53-109806

  The present invention has been made in view of the above circumstances, and its solution is to use a hygroscopic material such as polyester or polyamide without using a hygroscopic agent that causes foreign matter and without prior film drying. The frill-like slack trouble that occurs because the end of the roll wound with a film made of a high polymer film absorbs moisture in the atmosphere and prevents it from expanding, and the end of the film is longer than the center. It is providing the polymer film roll package which improved this.

  As a result of intensive studies in view of the above problems, the present inventor has found that the above problems can be easily solved by adopting a specific configuration, and the present invention has been completed.

  That is, the gist of the present invention is a polymer comprising a polymer film roll wound up on a paper core having a moisture content of 0.5% by weight or less and wrapped with a moisture-releasing film. It exists in a film roll package.

Hereinafter, the present invention will be described in detail.
For the core of the film roll used in the present invention, a dried paper tube is used as the core. The moisture content of the core is 0.5% by weight or less, preferably 0.4% by weight or less, and more preferably 0.3% by weight or less. If the moisture content of the core exceeds 0.5% by weight, the frill-like slack that occurs in the film cannot be prevented.

  As the paper tube, it is desirable to use a dust-proof treated paper tube with less fuzz that may cause foreign matters.

  In the present invention, since the paper tube functions as a kind of hygroscopic agent, it is necessary to pay attention to the moisture content of the paper tube with respect to the assumed amount of air inside the moisture-proof film. Therefore, it chooses suitably. Note that the inner diameter of the core and the length of the core cannot always be freely selected, so when it is necessary to increase the water content by increasing the paper tube volume, the necessary water content can be secured by increasing the thickness of the paper tube. It is recommended to do.

  The method for drying the paper tube is not particularly limited, and examples thereof include a method of heat-treating with dry hot air and a method of storing for several days to several months in a storage space controlled in a dry atmosphere with a cooler, a hygroscopic agent, or the like.

  The moisture-proof film referred to in the present invention refers to a film having extremely low moisture permeability, such as a laminate of aluminum foil and a polyethylene film on which aluminum is deposited.

  According to the present invention, the frills of the film due to moisture in the film can be avoided without using a hygroscopic agent that causes foreign matter and without undergoing prior film drying. Industrial value is high.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to the following examples. In addition, the measuring method and evaluation method in the present invention are as follows.

(1) Moisture content of paper tube The moisture content of the paper tube is measured using a Ketto Paper Moisture Science Laboratory meter (PM-80).

(2) Number of slack edges The film roll package after packing is stored for 30 days in an environment of 23 ° C and 50RH%, then the outermost layer film is unwound and collected, spread on a flat table and spread on the edge. Count the number of frill-shaped irregularities that occurred.

(3) Moisture content of the film The moisture content of the film is measured by using a Karl Fischer moisture meter, cutting the film into a 15 mm wide size, and cutting out the necessary length so that the weight is about 1 g. The cut sample is rounded down and stopped with a clip and measured.

Example 1:
Paper tube G core (thickness 15 mm, inner diameter 6 inches, length 1200 m, moisture content 7.8 ± 1.5%) is dried for 1 hour at 110 ° C. in a nitrogen stream using a hot air oven. After cooling to room temperature in a nitrogen atmosphere, a winding core having a water content of 0.3% by weight was obtained. Diafoil T100-188 (Mitsubishi Resin Co., Ltd. size 1060 mm × 1200 m), which is a biaxially stretched polyester film having a thickness of 188 μm, was rolled up on this paper tube to form a film roll. The winding conditions were a tension of 520 N and a speed of 150 m / min. After winding up, it was wrapped in a moisture-proof film aluminum laminated paper (OPP / aluminum laminate film) manufactured by Murakaku Co., Ltd., and further wrapped in a polyethylene film and packed.

Comparative Example 1:
A product was obtained in the same manner as in Example 1 except that the paper tube was not dried.

Comparative Example 2:
A product was obtained in the same manner as in Example 1 except that no polyethylene film was used.

  The obtained results are summarized in Table 1 below.

  The present invention can be suitably used as a package of a film made of a highly hygroscopic polymer such as a polyester film or polyamide.

Claims (1)

A polymer film roll package comprising a polymer film roll wound up on a paper core having a water content of 0.5% by weight or less and a moisture-releasing film.