Patent EP0980894A1 successfully refreshed from Google Patents.
EP0980894A1
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EP
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Polylactic acid composition and film thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1999-03-05
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Granted: —
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Expires: 2019-03-05
Abstract
Abstract The invention discloses a polylactic acid-based resin composition composed of a high molecular ingredient (A) comprising polylactic acid (a1) and an aliphatic polyester (B), and a film, particularly an inflation film, prepared from the resin composition. The film comprising the polylactic acid-based resin composition of the invention is biodegradable and excellent in flexibility and resistance to blocking of film and bleeding-out of plasticizer, has no anisotropy in tear strength, and can be suitably used for an agricultural multi-film and garbage bag. When the film of the invention is used for food wrapping, the film prevents fungus growth and contamination of color or odor, and thus can be suitably used.
Inventors
- 👤 Yasunori 405 Higashi Totsuka Ryo YOSHIDA
- 👤 Shoji Obuchi
- 👤 Yasuhiro Kitahara
- 👤 Takayuki 509 Higashi Totsuka Ryo WATANABE
- 👤 Hisashi Aihara
- 👤 Tomoyuki 503 Higashi Totsuka Ryo NAKATA
- 👤 Kazuhiko Suzuki
- 👤 Masanobu Ajioka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 10:03
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C55/00; B29C55/28; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08L; C08L67/00; C08L67/02; C08L67/04; B29K; B29K2995/00; B29K2995/0037; B29K2995/0059; B29K2995/006; C08J2367/00; C08J2367/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A polylactic acid-based resin composition characterized
by comprising 100 parts by weight of a high molecular ingredient
(A) and 5 to 25 parts by weight of a biodegradable plasticizer
(B), wherein said high molecular ingredient (A) comprises 50
to 90 % by weight of polylactic acid (a1) and 10 to 50 % by
weight of a biodegradable aliphatic polyester (a2) having a
melting point of 80 to 250°C.
Claim 2
Dependent Claim
18 words
The polylactic acid-based resin composition according to
claim 1, wherein the biodegradable aliphatic polyester (a2)
is polybutylene succinate.
Claim 3
Dependent Claim
40 words
The polylactic acid-based resin composition according to
claim 1 or 2, wherein the biodegradable plasticizer (B) is one
or more plasticizers selected from the group consisting of an
aliphatic polybasic acid ester, aliphatic polyhydric alcohol
ester and oxyacid acid ester.
Claim 4
Dependent Claim
29 words
The polylactic acid-based resin composition according to
claim 1 or 2, wherein the biodegradable plasticizer (B) is one
or more of acetyltributylcitric acid, triacetin, dibutyl
sebacate and triethyleneglycol diacetate.
Claim 5
Dependent Claim
118 words
A polylactic acid-based resin film having excellent in
flexibility and resistance to bleeding-out of plasticizer and
blocking of film at high temperature, characterized by comprising a polylactic acid-based resin
composition comprising 5 to 25 parts by weight of a
biodegradable plasticizer (B) for 100 parts by weight of a high
molecular ingredient (A) containing 50 to 90 % by weight of
polylactic acid (a1) and 10 to 50 % by weight of a biodegradable
aliphatic polyester (a2) having a melting point of 80 to 250°C,
having an elastic modulus of 200 to 1,000 MPa and a
longitudinal/transverse ratio of 0.8 to 1.2 in tear strength
and neither bleeding-out of plasticizer nor blocking of film at
60 to 120°C.
Claim 6
Dependent Claim
40 words
The polylactic acid-based resin film according to claim
5, wherein the tear strength is 20 to 1,000 g both in
longitudinal and transverse directions when converted to the
value of superimposing 16 sheets of film having a thickness
of 30µm.
Claim 7
Dependent Claim
19 words
The polylactic acid-based resin film according to claim
5 or 6, wherein the aliphatic polyester (a2) is polybutylene
succinate.
Claim 8
Dependent Claim
41 words
The polylactic acid-based resin film according to anyone
of claims 5 to 7, wherein the plasticizer (B) is one or more
compounds selected from the group consisting of an aliphatic
polybasic acid ester, aliphatic polyhydric alcohol ester and
oxyacid acid ester.
Claim 9
Dependent Claim
36 words
The polylactic acid-based resin film according to anyone
of claims 5 to 7, wherein the plasticizer (B) is one or more
compounds selected from the group consisting of
acetyltributylcitric acid, triacetin, dibutyl sebacate and
triethyleneglycol diacetate.
Claim 10
Dependent Claim
20 words
The polylactic acid-based resin film according to anyone
of claims 5 to 9, wherein the film is an inflation film.
Claim 11
Dependent Claim
100 words
A process for preparing a polylactic acid-based resin
film being flexible and excellent in resistance to film
blocking and plasticizer bleed-out, characterized by
inflation-molding a polylactic acid-based resin composition
comprising 5 to 25 parts by weight of a biodegradable
plasticizer (B) for 100 parts by weight of a high molecular
ingredient (A) containing 50 to 90 % by weight of polylactic
acid (a1) and 10 to 50 % by weight of a biodegradable aliphatic
polyester (a2) having a melting point of 80 to 250°C, at resin
extrusion temperature of 150 to 220°C with a blow-up ratio of
1.5 to 3.0.
Claim 12
Dependent Claim
21 words
The process for preparing a lactic acid-based resin film
according to claim 11, wherein the aliphatic polyester (a2)
is polybutylene succinate.
Claim 13
Dependent Claim
43 words
The process for preparing a lactic acid-based resin film
according to claim 11 or 12, wherein the plasticizer (B) is
one or more compounds selected from the group consisting of
an aliphatic polybasic acid ester, aliphatic polyhydric
alcohol ester and oxyacid acid ester.
Claim 14
Dependent Claim
38 words
The process for preparing a lactic acid-based resin film
according to claim 11 or 12, wherein the plasticizer (B) is
one or more compounds selected from the group consisting of
acetyltributylcitric acid, triacetin, dibutyl sebacate and
triethyleneglycol diacetate.
References Cited (Backward Citations)
No citation records indexed.
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