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Polylactic acid film or sheet

A polylactic acid and film technology, applied in the field of polylactic acid-based films or sheets, separator films, adhesive tapes or sheets, and can solve the problems of film or sheet breakage, cracking, separator breakage, etc.

Inactive Publication Date: 2013-07-31
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the heat resistance of the polylactic acid-based resin film or sheet obtained in this way is improved, there is a possibility that the film or sheet may be broken or cracked during production, processing, or winding into a roll, etc.
Therefore, when such a film or sheet is used as a base material such as a separator (release liner), an adhesive tape, a protective film, etc., during the production or processing of the separator, etc., cracks may occur in the separator, etc. to crack

Method used

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Examples

Experimental program
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Embodiment

[0214] Examples and comparative examples are given below to further describe the present invention in detail. The present invention is not limited by them in any way. In addition, the evaluation in an Example etc. was performed as follows.

[0215] Materials used in Examples and the like are shown below.

[0216]

[0217] A1: Product name "TERRAMAC TP-4000" (manufactured by UNITIKA LTD.)

[0218]

[0219] B1: Acrylic modified polytetrafluoroethylene (trade name "METABLEN A-3000", manufactured by Mitsubishi Rayon Co., Ltd.)

[0220]

[0221] C1: Zinc phenylphosphonate (trade name "ECOPROMOTE", manufactured by Nissan Chemical Industries, Ltd.)

[0222]

[0223] D1: Modified polypropylene containing maleic anhydride groups (weight average molecular weight 32,000, acid value 52 mgKOH / g, trade name "Umex 1010", manufactured by Sanyo Chemical Industry Co., Ltd.)

[0224]

[0225] E1: Polyglycerol fatty acid ester (number average molecular weight Mn1000, trade name "CHIRA...

Embodiment I-1

[0230] Prepare the resin composition according to the compounding ratio shown in the following Table 1, melt and knead with a Banbury mixer, and then use an inverted L-shaped 4-roller calender to perform calendering to form a film to a thickness of 50 μm (melt film forming process ). Next, if figure 1 As shown, after the melting film forming process, three rolls (leading rolls) that can be heated to any temperature are arranged immediately, so that the resin composition melted and formed into a film can pass alternately up and down, thereby promoting crystallization (crystallization promoting process ). Then, the resin composition is solidified by passing through cooling rolls to form a film. The temperature of the resin composition in the melt film forming process (resin temperature at the time of melt film forming) is set to be equivalent to figure 1 The surface temperature of the 4th roll in the 4th roll. In addition, regarding the temperature of the resin composition...

Embodiment I-2～I-5

[0232] Resin compositions were prepared according to the compounding ratios shown in the following Table 1, and films of Examples I-2 to I-5 were prepared in the same manner as in Example I-1.

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Abstract

A polylactic acid film or sheet is a resin film or a sheet containing polylactic acid (A), wherein the melting endothermic value (delta HC') in a crystallization section at the time of film-forming, which is called for by formula (1) delta HC'= delta Hm- delta Hc (1) (In the formula, delta HC is the exothermic value (J / g) accompanied with crystallization in the heating process of the film or sheet after film-forming, and is measured using a DSC; delta Hm is the endothermic value (J / g) accompanied with the melting thereafter.), is 10J / g or more, and a tearing strength in a flow direction (MD direction) and a width direction (TD direction) both are 2.5N / mm or more. This polylactic acid film or sheet does not melt or deform even at temperatures exceeding 100 DEG C, and furthermore, during production and machining of the film or sheet, no breakage or tearing, when the film or the sheet is rolled into a roll or the like, happans.

Description

technical field [0001] The present invention relates to a polylactic acid-based film or sheet, and more specifically, to a polylactic acid-based film or sheet that is excellent in heat resistance and does not break or crack during production or processing. [0002] In addition, the present invention relates to a separator, and more specifically, to a separator (release liner) that uses a polylactic acid-based film or sheet that is excellent in heat resistance and does not break or crack during manufacture or processing as a base material. ). The release film can be used to protect the adhesive layer of adhesive tapes, adhesive sheets, labels, etc. [0003] Furthermore, the present invention relates to an adhesive tape or sheet, and more specifically, to an adhesive tape using a polylactic acid film or sheet as a base material which is excellent in heat resistance and does not break or crack during production or processing. or slices. [0004] Furthermore, the present invent...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L23/26C08L27/18C08L67/04
Inventor 石黑繁树吉江里美千田洋毅高比良等关口裕香林内梨惠远藤明日香
Owner NITTO DENKO CORP
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