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Easy-split stretched film, easy-split laminated film, easy-split bag, and manufacturing method for easy-split stretched film

An easy-to-tear, laminated film technology, used in chemical instruments and methods, layered products, flexible coverings, etc. The effect of excellent, excellent straight-line cutting properties, and excellent impact resistance

Active Publication Date: 2007-01-10
IDEMITSU UNITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a biaxially stretched film containing a mixed resin of Ny6 and MXD6 constitutes a laminated film and is placed under severe conditions, so-called intralayer peeling may occur in the layer of the biaxially stretched film.
If such intralayer peeling occurs, the strength of the laminated film will become unstable, which will cause practical problems when forming a bag.

Method used

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  • Easy-split stretched film, easy-split laminated film, easy-split bag, and manufacturing method for easy-split stretched film
  • Easy-split stretched film, easy-split laminated film, easy-split bag, and manufacturing method for easy-split stretched film
  • Easy-split stretched film, easy-split laminated film, easy-split bag, and manufacturing method for easy-split stretched film

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0052] The easy-to-tear stretch film of this embodiment contains Ny6 and MXD6 as raw materials, and the raw materials include: a virgin material containing 60 to 85 parts by mass of Ny6 and 15 to 40 parts by mass of MXD6, and formed by melting and kneading Ny6 and MXD6 The melting point of MXD6 in the thermal history is 233-238° C., and the content of the thermal history is 5-40% by mass based on the total amount of raw materials. Here, the chemical formula of Ny6 is shown in Formula 3, and the chemical formula of MXD6 is shown in Formula 4.

[0053] [Formula 3]

[0054] H-〔NH-(CH 2 ) 5 -CO〕 n -OH

[0055] [Formula 4]

[0056]

[0057] From the point of view of linear cutability and impact strength of the film after film formation, the blending ratio of Ny6 and MXD6 must be 60-85 parts by mass of Ny6 and 15-40 parts by mass of MXD6 in the virgin material. When the amount of MXD6 is less than 15 parts by mass in the virgin material, the linear cutting property will det...

no. 2 Embodiment approach

[0070] The easily tearable laminated film of the present invention contains at least one layer of the easily tearable stretched film, and may contain several layers such as two layers or three layers. exist Figure 2 ~ Figure 4 In , the easily tearable laminated film 100, 200, 300 of this embodiment is shown. Here, for example, as figure 2 As shown, the first layer is a 2-layer structure of easy-tearable stretch film 18, and the second layer is various sealing layer films 19; figure 2 As shown, the first layer is a 3-layer structure of various substrate films 20, the second layer is an easily tearable stretch film 18, and the third layer is various sealing layer films 19; image 3 Shown; The first layer is a 3-layer structure of easy-tearable stretch film 18, the second layer is various substrate films 20, and the third layer is various sealing layer films 19.

[0071] As the material of the base film 20, for example, PET (polyethylene terephthalate), EVOH (ethylene-vinyl...

Embodiment 1

[0081] (Manufacture of tearable stretch film)

[0082] With respect to the mixture obtained by mixing Ny6 pellets and MXD6 pellets at a ratio of 70 parts by mass and 30 parts by mass, respectively, 15% by mass of a thermal history material (the melting point of MXD6) that has been melt-mixed once and pelletized according to the compounding ratio is blended. is 236°C). The dry blend was melted and kneaded in an extruder at 270° C., and the melt was extruded from a die into a cylindrical film, which was then quenched with water to produce a base film.

[0083] In addition, the melting point of MXD6 was measured by using a differential scanning calorimeter (DSC) manufactured by Perkin Elmer Co., Ltd., from 50°C to 280°C at a heating rate of 10°C / min. In all cases, the initial value was taken as the melting point.

[0084] As Ny6, nylon 6 [UBE Nylon 1023FD (trade name), relative viscosity ηr=3.6] manufactured by Ube Industries, Ltd. was used, and as MXD6, m-xylylene adipamide ma...

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Abstract

PROBLEM TO BE SOLVED: To provide an easily tearing stretched film having excellent linear cutting property and not causing interlayer exfoliation in a stretched film layer; and to provide an easily tearing laminate film and an easily tearing bag using the same, and a method for manufacturing an easily tearing stretched film.SOLUTION: The easily tearing stretched film includes a virgin raw material composed of 60 to 85 parts by mass of Ny6 and 15 to 40 parts by mass of MXD6, and a raw material containing a thermal history product prepared by melting and kneading Ny6 and MXD6 and having a melting point of the MXD6 of 233 to 238°C, wherein the content of the thermal history product is 5 to 40 mass% based on the total amount of the raw materials.

Description

[0001] technical field of invention [0002] The present invention relates to an easily tearable stretch film, an easily tearable laminated film, an easily tearable bag, and a method for producing the easily tearable stretch film. Background technique [0003] In Japan, in order to contribute to the arrival of an aging society, the elderly or disabled can live a comfortable social life with young people or healthy people, and the concept of "barrier-free" that eliminates barriers in various fields began to attract attention. [0004] On the other hand, films such as linear low-density polyethylene (L-LDPE) are often used as sealing substrate (sealing layer) films of packaging bags for food and pharmaceuticals. This L-LDPE film is safe because of its excellent sealing strength, but it has a high tear resistance, so it cannot be torn straight along the scratches during use, making it difficult to open the film. [0005] Therefore, even in the field of packaging, the requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K5/18C08J5/18B32B27/34B29C55/00
CPCB29C55/005B29C55/02B32B27/08B32B27/32B32B27/34B65D65/40C08J5/18C08J2377/02C08J2477/06C08L77/02C08L77/06
Inventor 高重真男
Owner IDEMITSU UNITECH CO LTD
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