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Matte film

A film and sheet technology, applied in the field of polylactic acid resin films or sheets, can solve the problems of undisclosed matting properties, undisclosed matting films, difficult films or sheets, etc., and achieve the effect of good film-making stability

Inactive Publication Date: 2007-01-31
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to obtain a thin film with good matting properties only by adding inorganic particles and organic particles, and Patent Document 5 does not disclose the improvement of matting properties.
That is, it has not been possible to obtain films or sheets with good matting properties using polylactic acid resins so far.
[0012] In particular, there is no disclosure of a stretched film made of polylactic acid resin containing polylactic acid resin as the main component (75% by weight or more), but in Patent Document 6 (JP-A-8-502552), Patent Document 7 ( Patent No. 2742892), Patent Document 8 (Patent No. 3008071), Patent Document 9 (Patent No. 3055001), Patent Document 10 (Patent No. 3154056), and Patent Document 11 (Patent No. 2939586) discloses a biodegradable film formed by chemically modified starch-based biodegradable resin, the chemically modified starch-based biodegradable resin contains at least one selected from starch ester, starch ether, polyester graft polymerized starch Mixture of biodegradable polyester containing polylactic acid resin as the main part (50% by weight or more) of starch derivative
In these documents, when the starch derivative is used as the main body, a film having good compatibility with a biodegradable polyester containing a polylactic acid polymer and excellent transparency is disclosed, but no film having good matting properties is disclosed at all. film
[0013] In addition, when mixing a second resin that is poorly compatible with the resin as the main component, the second resin is usually mixed unevenly, and the resulting mixture is opaque.
The film or sheet formed from this mixed resin has a certain degree of matting, but is brittle
It is often difficult to obtain stable films or sheets from this resin, and in many cases it is difficult to obtain particularly thin films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1～A39 and comparative example A1～A5

[0245] In Examples A1 to A39 and Comparative Examples A1 to A5, crystalline polylactic acid (a1) and (a2), non-crystalline polylactic acid (a3), and Japanese corn as chemically modified starch (B) in Table 1 were used Esterified starch manufactured by starch Co., Ltd., コ-ンポ-ルCP-1, CP-3, CP-5, CP-7, ATBC as plasticizer (C), リケマ-ルPL-009, PL -019, the mixed raw material particles are obtained as follows. That is, after 75% by weight of polylactic acid and 25% by weight of chemically modified starch are dry blended, a co-rotating twin-screw extruder is used for melt mixing to obtain polylactic acid composite particles with a chemically modified starch content of 25%. Similarly, 50% by weight of polylactic acid and 50% by weight of chemically modified starch are used to obtain polylactic acid composite particles with a chemically modified starch content of 50%. In addition, in a co-rotating twin-screw extruder, 10% by weight of a plasticizer was added to 90% by weight of polylactic aci...

Embodiment A40～A51

[0250] In Examples A40 to A43, Example A49, and Example A51, films were formed as follows: the first layer (outermost layer) and the third layer (innermost layer) used polylactic acid obtained in the same manner as in Examples A1 to A39 The composite particles and 100% polylactic acid particles (a1), (a2) and (a3) ​​were dry blended into the composition shown in Table 6 and extruded; the second layer (intermediate layer) was combined with the composition shown in Table 6 Examples A1 to A39 similarly obtained polylactic acid composite particles with a plasticizer content of 10%, polylactic acid particles, and ピオノ-ル#3001 (Showa Polymer Co., Ltd. polybutylene adipate succinate) particles After dry mixing, extrude from a 3-layer cylindrical die with an outer die diameter of 110 mm, an inner die diameter of 108 mm, and a die gap of 1.0 mm. The die temperature is set to 160°C and extruded to finally form all 2 layers. A 3-layer film with a thickness of 13μm. In addition, in Examples A44...

Embodiment A52～A56 and comparative example A6

[0254] In Examples A52 to A56, silicone resin particles KMP590 (trade name) as the particulate polymer (D) and Suntec LD F-1920 (trade name) as the non-adhesive resin were also used. The fine particle polymer (D) was used as a 10% masterbatch by melt-mixing 90% by weight of polylactic acid and 10% by weight of silicone resin particles using a co-rotating twin-screw extruder.

[0255] The first layer (the outermost layer of the tubular film) used the composition shown in Table 9, and the same as in Examples A1 to A39, using a co-rotating twin-screw extruder, melt-mixed, obtained polylactic acid composite particles and the above particles Polymer (D) masterbatch; the second layer (intermediate layer) uses the composition shown in Table 9, mixing polylactic acid and ビオノ-レ#3001 or エコフレツクス or used alone; the third layer (the outermost part of the tubular film) Layer) In Examples A52, A54, and A55, low-density polyethylene Suntec LD-F1920, in which the resin of the second layer is a non...

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Abstract

A polylactic acid resin film or sheet which can be satisfactorily and stably formed and has excellent matte properties. It is a single-layer matte film or sheet which comprises a polylactic acid resin composition containing a particulate substance and at least one side of which has a surface gloss as measured in accordance with ASTM-D2457-70 (45° gloss) of 60% or lower.

Description

Technical field [0001] The present invention relates to a polylactic acid resin film or sheet having good film-forming stability and excellent matting properties. Furthermore, it relates to heat-shrinkable or heat-non-shrinkable films or sheets of matte tone (mat type), and packaging materials obtained by laminating them with other materials, cultivation rooms, and agricultural materials such as multilayer films, suppressing gloss and presenting high-quality and uniformity The appearance of wallpapers, screens, interior decorations, daily necessities, envelopes, file boxes, cover processed products and other school supplies, stationery, notebooks, paper products and paper containers, cloth products, fiber products, etc. Background technique [0002] Generally, transparent and glossy stretched films are widely used as packaging materials, and resin materials such as polyethylene terephthalate, polypropylene, and polyethylene are used for the film. On the other hand, wallpapers tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04A01G9/14A01G13/00B32B27/36B65D65/46B32B7/12C08J3/05C08J5/18C08K5/00C08K5/101C08L3/06C08L3/08C08L51/02
CPCC08K5/101C08L2205/14C08J2367/04B32B27/10B32B7/12B32B2307/7145B32B2410/00B32B2307/7163B32B2439/00B32B27/36B32B27/22B32B2264/06B32B2307/408C08L51/02B32B2307/7265B32B2553/00C08J5/18C08K5/0016B32B2607/02C08L3/06B32B2601/00C08L3/08C08L67/04Y10T428/254Y10T428/2973Y10T428/25Y10T428/1303Y10T428/298Y10T428/31786Y10T428/31504Y10T428/31971C08L2666/26C08L2666/24
Inventor 八塚道浩锄柄正幸板田光善
Owner ASAHI KASEI KK
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