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Polylactic acid film

A polylactic acid-based and polylactic acid technology, applied in the field of polylactic acid-based films, can solve problems such as insufficient flexibility and impact resistance, and achieve the effect of excellent processability

Active Publication Date: 2016-09-21
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if polylactic acid is to be applied to flexible films in which polyolefins such as polyethylene are used as a representative raw material, flexibility and impact resistance are insufficient, so various attempts have been made to improve these characteristics and put them into practical use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0139] Examples are shown below to describe the present invention more specifically, but the present invention is not limited by these Examples.

[0140] [Measurement and evaluation method]

[0141] Measurements and evaluations shown in Examples were performed under the conditions shown below.

[0142] (1) Tensile modulus of elasticity (MPa)

[0143] Tensile elastic modulus was measured in an atmosphere at a room temperature of 23° C. and a relative humidity of 65% using “TENSILON” (registered trademark) UCT-100 manufactured by Orion Tech Co., Ltd. Specifically, the sample is cut into a long strip with a length of 150 mm and a width of 10 mm in the measurement direction, and the distance between the chucks is initially stretched at 50 mm and the stretching speed is 200 mm / min, according to the method stipulated in JIS K7127 (1999). , the measurement was performed 10 times each in the longitudinal direction and the width direction, and the average value thereof was defined as...

Embodiment 1

[0200] Except having changed the composition of a film as shown in Table 1, it carried out similarly to the comparative example 1, and obtained the film of thickness 20 micrometers.

[0201] Next, under the conditions of a roll temperature of 50° C. (both the upper stage and the lower stage), a nip pressure (linear pressure) of 50 kg / cm, and a roll rotation speed of 1.0 m / min, the above-mentioned film was rolled from a device manufactured by Liroel Co., Ltd. The embossing roller (II) (upper section) of the heating embossing machine HTEM-300 passes between the super-hard rubber roller (lower section) with a hardness of D-90, thereby embossing. Table 1 shows the physical properties of the film.

Embodiment 2～24、 comparative example 2～3

[0203] A film was obtained in the same manner as in Example 1, except that the composition of the film and the embossing conditions were changed as in Tables 1 to 4. The physical properties of the obtained film are shown in Tables 1-4.

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Abstract

The present invention provides a polylactic acid-based film, which is a film formed of a composition containing a polylactic acid-based resin (A), has a discontinuous portion of recesses or protrusions on at least one surface of the film, and has a moisture permeability of 500 to 3,000 g / (m2·day). It is a polylactic acid-based film having excellent moisture permeability, water repellency, flexibility, and processability, as well as high biomass.

Description

technical field [0001] The present invention relates to a polylactic acid-based film having excellent moisture permeability, water repellency, flexibility, and processability, and having high biomass. Background technique [0002] In recent years, the problem of soil pollution caused by the disposal of plastic products and the problem of global warming caused by the increase of carbon dioxide caused by incineration have attracted attention due to the improvement of environmental awareness. As a countermeasure for the former, various biodegradable resins have been actively researched and developed. As a countermeasure for the latter, biodegradable resins made of biomass (raw materials derived from plants) that do not add new carbon dioxide loads to the atmosphere even if incinerated Resins are actively researched and developed. Polylactic acid, which satisfies these two objectives and is also comparatively advantageous in terms of cost, has attracted attention. However, if ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L67/00C08L67/04C08L101/16
CPCB29C59/04B29K2067/046C08J5/18C08J2367/04C08L67/04
Inventor 山村刚平广田真之浜崎莉沙山内英幸末冈雅则坂本纯
Owner TORAY IND INC