第一情报 ---化学工业

聚乳酸相关专利分析(三)——聚乳酸包装材料DERWENT专利分析

供稿人:瞿丽曼  供稿时间:2004-12-13   关键字:聚乳酸  包装材料  专利  
 
聚乳酸(PLA)是以有机酸乳酸为原料生产的新型聚酯材料,性能胜于现有塑料聚乙烯、聚丙烯、聚苯乙烯等材料,被产业界定为二十一世纪最有发展前途的新型包装材料,是环保包装材料的一颗明星,在未来将有望代替聚乙烯、聚丙烯、聚苯乙烯等材料用于塑料制品,应用前景广阔。
 
近年来,世界上许多公司纷纷开始研究聚乳酸在包装中的应用,并申请了大量专利。笔者在DERWENT专利数据库中对聚乳酸在包装中的应用进行了检索(检索日期:2004年11月26日),发现共有430篇相关专利报道,对以上专利文献进行分析,做出以下结论:
 
一、申请专利族数量最多的前十大公司分析
笔者对1982年-2004年世界上聚乳酸在包装中应用的专利公开进行分析,发现申请量(本文所指的申请量是指DERWENT的专利族,即当发明人就同一发明主题在多国提出专利申请时,DERWENT公司将其收到的在“主要”国家首次公开的专利申请文件定义为基本专利,而将随后一年内收到在其他国家申请的专利视为同一专利族,只统计一次)最多的前十大公司分别为:
MITSUBISHI PLASTICS IND LTD、UNITIKA LTD、SHIMADZU CORP、SHIMADZU CORP、TOPPAN PRINTING CO LTD、TORAY IND INC、KANEBO LTD、KANEBO GOSEN KK、ASAHI KASEI KK、TOYOBO KK。
对以上各年度各公司的专利申请情况进行分析,结果如下表。由表可见,2003年申请的专利总量最多,2003年申请专利量较多的公司为TOYOBO KK、ASAHI KASEI KK、TOPPAN PRINTING CO LTD、UNITIKA LTD、MITSUBISHI PLASTICS IND LTD;2004年申请专利量最多的则是TORAY IND INC,表明了该公司在聚乳酸于包装方面的应用研究正加大了投入力度。
 
二、公开专利的分类分析
通过对聚乳酸包装材料专利的分类进行分析可知,公开的专利中所属专利分类(DERWENT分类)较多的为:
(1)B29C-塑料的成型或连接;塑性状态物质的一般成型;已成型产品的后处理,如修整。
(2)B29D-用塑料或用塑性状态的物质生产特殊制品;
(3)B29K-关于成型材料与小类B29B、C或D有关的引得分类表;
(4)B32B-层状产品;
(5)B65D-用于物体或物料贮存或运输的容器,如袋、桶、瓶子、箱盒、罐头、纸板箱、板条箱、圆桶、罐、槽、料仓、运输容器;所用的附件、封口或配件;包装元件;包装件;
(6)C08G-用碳-碳不饱和键以外的反应得到的高分子化合物;
(7)C08J-加工;配料的一般工艺过程;
(8)C08L-高分子化合物的组合物;
对其中申请专利族最多的公司MITSUBISHI PLASTICS IND LTD各年专利申请的专利分类进行分析,结果如下:
    由上图可知,MITSUBISHI PLASTICS IND LTD 2001年公开专利的专利分类主要为C08L、C08K、C08J、B65D、B32B、B29L、B29K、B29C、A23L;2003年公开专利的专利分类主要为:C23C、C08L、C08K、C08J、B65D、B32B、B29L、B29K、B29C;2004年公开专利的专利分类主要为:C08L、C08J、B29C。
 
三、   公开专利的国别分析
对公开的聚乳酸包装材料专利按专利优先权国家进行统计分析,具体结果如下表:
 
 
JP
US
DE
GB
ITTO
FI
CN
NL
EP
SE
CH
KR
CA
WOEP
EE
1982
1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1986
 
1
 
 
 
 
 
 
 
 
 
 
 
 
 
1987
 
1
 
 
 
 
 
 
 
 
 
 
 
 
 
1989
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
1990
 
 
1
 
 
 
 
 
 
 
 
 
 
 
 
1991
1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1992
2
2
 
 
 
 
 
 
 
 
 
 
 
 
 
1993
2
6
 
 
 
 
 
 
 
 
 
 
 
 
 
1994
4
7
6
1
 
 
 
1
 
 
 
 
 
 
 
1995
3
5
2
 
 
 
 
 
 
 
 
 
 
 
 
1996
6
1
 
1
 
1
 
 
 
 
 
 
 
 
 
1997
6
2
1
 
 
3
 
 
 
 
 
 
 
1
 
1998
7
3
1
 
 
1
 
1
 
 
 
 
 
 
 
1999
9
9
2
1
 
 
 
1
 
 
1
 
 
 
 
2000
28
6
5
 
1
2
 
 
 
 
 
 
 
 
 
2001
32
10
3
1
1
 
1
 
 
1
 
1
 
 
 
2002
33
11
8
4
6
 
2
 
 
1
1
 
 
 
1
2003
72
11
2
1
 
 
 
 
3
 
 
 
 
 
 
2004
58
14
1
1
 
 
2
 
 
 
 
 
1
 
 
总计
264
89
32
10
8
7
5
4
3
2
2
1
1
1
1
 
由上表数据可知,日本申请的聚乳酸在包装领域的应用专利最多,其次是美国、德国、英国等。
 
四、2004年以来聚乳酸包装应用的专利公开列表如下:
 
申请号
专利名称
申请人
申请日
WO2004087812-A1
Polylactic acid resin composition for forming molded product e.g. biaxially stretched film, is formed by mixing polylactic acid resin having preset weight average molecular weight, and cellulose ester
TORAY IND INC
2004.2.10
JP2004256642-A
Hot melt adhesive agent for sanitary products, book-binding products, contains mixture of thermomeltable polyvinyl alcohol resin and polylactic acid, in specified amounts
NIPPONSOBI POBARU KK
 2003.2.25
JP2004285121-A
Polylactic acid group compound for composite material, has polylactic acid unit and amide unit which are bonded via alkylene group
TOYOTA CHUO KENKYUSHO KK
2003.3.19
JP2004276543-A
Biaxially stretched laminated film for film for packaging, has coating layer, provided on surface(s) of base material layer containing aliphatic polyester composition having specific aliphatic polyester copolymer and polylactic acid
DAICEL CHEM IND LTD; TOSERO KK
 2003.3.18
US2004180990-A1; JP2004269765-A
Resin molded article comprises crystallizable, biodegradable plastic resin containing polylactic acid as its main component, glass fiber, and hollow glass balloon surface treated with coupling agent
FUJI PHOTO FILM CO LTD
2004.3.18;
2003.3.11
JP2004262178-A
Base material for clay group desiccant packaging, has preset difference in heat resistant temperature of biodegradable material layer and biodegradable resin layer
IDEMITSU UNITECH CO LTD
2003.3.4
JP2004269034-A
Packaging bag for fruits and vegetables, is cut at specified shapes at its corners
SUMITOMO BAKELITE CO LTD
2003.3.12
JP2004256795-A
Polylactic acid group film for packaging foodstuffs, has preset haze, melting point, fracture strength and thickness
TORAY IND INC
2004.1.20
JP2004262029-A
Polylactic acid-group biaxial stretched film as bags, is obtained by laminating heat-sealing layer having specific copolymers, on base layer having polylactic acid-type resin and aliphatic-aromatic copolyester in preset mass ratio
UNITIKA LTD
2003.2.28
JP2004256570-A
Polylactic acid type film for laminated film used as packaging material for foodstuffs and pharmaceutical, consists of coating layer containing ethylene vinyl-acetate copolymer saponified compound and aqueous adhesive improvement agent
TORAY IND INC
2003.2.24
JP2004231860-A
Biodegradable synthetic paper for calendar and poster, contains biodegradable polyester resins and particle-like filler, and has preset surface roughness
UNITIKA LTD
2003.1.31
JP2004182772-A
Biodegradable composite material used for forming molded product such as sheet, film and packing material, comprises organic polymer compound and alkali, which have biodegradability
SONY CORP
2002.11.29
WO2004058893-A1; JP2004204128-A
Polylactic acid polymer composition for thermoforming and obtaining foodstuff containers, contains mixture of preset amount of non-crystalline polylactic acid polymer and crystalline polylactic acid polymer
MITSUBISHI PLASTICS INC;MITSUBISHI PLASTICS IND LTD
2003.10.24;
2002.10.26
JP2004190020-A
Biodegradable resin film for packaging, is formed by molding aliphatic polyester group biodegradable resin composition comprising aliphatic polyester copolymer having specific repeating units and biodegradable resin
DAICEL CHEM IND LTD;
TOSERO KK
2003.11.25
JP2004189833-A
Polylactic-acidsheet for container, contains preset amount of nucleating agent chosen from carboxylic amide, carboxylate salt, alcohol and carboxylate ester, and has crystallinity and preset degree of surface orientation
KANEBO LTD (KANE); KANEBO GOSEN KK (KANB)
2002.12.10
JP2004167977-A
Gas barrier film for packaging material, has ceramic vapor deposition layer, and plastic film having layer of preset composition, provided sequentially at surface
TOPPAN PRINTING CO LTD
2002.11.22
JP2004137632-A
Polylactic acid group original fiber for non-woven fabric, contains core-sheath type composite fiber containing polylactic acid type resin in which raw material of core portion is colored
NIPPON ESTER CO LTD (NPEC)
2002.10.18
JP2004175397-A
Gas barrier paper container used as packaging container, has paper coated with biodegradable resin on surface as main raw material, and ceramic thin film coated on biodegradable resin surface
TOPPAN PRINTING CO LTD
2002.11.27
JP2004161925-A
Polylactic acid type biaxially stretched film for packaging foodstuffs, has specific tensile elongation and modulus of elongation, and consists of preset copolyester and polylactic acid comprising L-lactic acid and D-lactic acid
UNITIKA LTD
2002.11.14
JP2004149692-A
Polylactic acid-type resin composition for molded product e.g. sheet, comprises preset amount of carboxylic amide, carboxylate salt, aliphatic alcohol and/or carboxylate ester, with respect to lactic acid group polyester and polylactic acid
KANEBO LTD (KANE); KANEBO GOSEN KK (KANB)
2002.10.31
JP2004143432-A
Poly-lactic acid type resin oriented film for foodstuff packaging, has surface layer portion containing liquid plasticizer and poly-lactic acid type resin, and preset heat resistance, modulus elongation and adherence force
TORAY IND INC (TORA)
2003.9.19
JP2004143268-A
Polylactic acid-type resin composition for molded product, comprises preset amount of plasticizer and lactic acid-type polyester of preset glass transition point, containing lactic acid- and polyester-component in preset weight ratio
KANEBO LTD (KANE); KANEBO GOSEN KK (KANB)
2002.10.23
US2004127123-A1; WO2004058314-A2
Biodegradable substrate having a durable hydrophilic layer useful in personal care products comprises a biodegradable polymeric substrate having a surface subjected to a corona glow discharge to render hydrophilic
KIMBERLY-CLARK WORLDWIDE INC (KIMB)
2003.12.10;
2003.12.15
US2004109998-A1; WO2004053213-A1; AU2003298642-A1
Continuous filament yarn useful for preparing fabric comprises outwardly projecting broken filament ends distributed around circumference of composite yarn
GOINEAU A M ; LAWRENCE D A; HENSON J B; MILLIKEN & CO
2002.12.9;
2003.11.13;
2003.11.13
WO2004048471-A1; AU2003302415-A1
Aliphatic polyester type biodegradable resin composition for molded products, consists of aliphatic polyester copolymer having molecular chain made of specific repeating units, and other biodegradable resin
DAICEL CHEM IND LTD
2003.11.25;
2003.11.25
JP2004058586-A
Polylactic acid group heat-shrink film used as packaging material, contains composition comprising polyester resin(s), polylactic acid group polymer, and plasticizer
MITSUBISHI PLASTICS IND LTD (MISD)
2002.7.31
JP2004149581-A
Biodegradable resin composition for fishing materials such as fishing net and packaging materials such as tray and blister for toothbrushes, comprises poly lactic acid and gelatin
DOKURITSU GYOSEI HOJIN SANGYO GIJUTSU SO; ALMIGHTY KK
2002.10.28
JP2004149636-A
Polylactic acid type resin composition for molded products, comprises polylactic acid polymer of L-lactic acid and/or D-lactic acid, caramelized-starch and glycerine fatty acid ester comprising diacetyl monoacyl glycerol
ASAHI KASEI LIFE & LIVING KK
2002.10.29
JP2004099670-A
Biodegradable film for bags, is obtained by biaxially stretching blend of poly-lactic-acid group polymer and biodegradable polymer, and has preset haze
UNITIKA LTD
2002.9.6
JP2004099658-A
Polylactic acid molded product for garments such as shirts, consists of polylactic acid which has amorphous portion of preset density
TORAY IND INC
2002.9.5
JP2004131726-A
Biodegradable polylactic acid group film or sheet used as packaging material, has specified glossiness and haze value and is formed from mixture of polylactic acid group polymer and caramelized starch group biodegradable resin
ASAHI KASEI LIFE & LIVING KK
2003.9.17
JP2004122777-A
Three-dimensional molded product is obtained by providing coating layer of biodegradable resin on inner surface of mat-like molding which comprises core-sheath type thermoplastic resin fiber and thermo bonding sheet for vacuum molding
TOPPAN PRINTING CO LTD
2003.9.10
JP2004010900-A
Method of increasing lubricity of drawn polylactic acid film or sheet for fabricating, involves drawing polylactic acid group polymers blended with biodegradable aliphatic polyester, and heat processing
MITSUBISHI PLASTICS IND LTD
2003.9.22
JP2004107505-A
Manufacture of foam molded product used as packaging material, involves maintaining biodegradable foam bead containing polylactic acid or its composition, in preset gas atmosphere, and performing in-mold molding
KANEBO LTD (KANE); KANEBO GOSEN KK (KANB)
 
2002.9.19
JP2004091684-A
Hollow molded product for containers and packaging material, comprises resin composition formed by blending polylactic resin and polyacetal resin
TORAY IND INC
2002.8.30
JP2004075727-A
Polylactic acid-type resin composition for films, is obtained by mixing anatase-type titanium dioxide which is not surface-treated or surface-treated hydrophilic rutile titanium dioxide, and polylactic acid-type polymer
AICHI KEN PREFECTURE ; TSUJI H ; UNITIKA LTD
2002.8.12
JP2004091681-A
Biodegradable resin composition for packaging material, comprises polylactic acid, mannan decomposition product and aliphatic polyester containing glycol and aliphatic dicarboxylic acid or its anhydride as main components
DOKURITSU GYOSEI HOJIN SANGYO GIJUTSU SO; ALMIGHTY KK
2002.8.30
JP2004051803-A
Biodegradable resin foam used for forming shock absorbing materials, has resin obtained by cross-linking thermoplastic polymer having polylactic acid-type polymer, (meth)acrylic acid ester, glycidyl ether in presence of organic peroxide
UNITIKA LTD
2002.7.19
JP2004059887-A
Polylactic acid resin molded article used as recording materials, consists of polylactic resin material having preset weight average molecular weight and melting point
FUJI PHOTO FILM CO LTD
2002.8.5
JP2004051196-A
Goods packaging case for portable radio, has claws which are projected in perpendicular direction of respective hooks of blister compact and inserted into respective slits
SONY CORP ; NIPPON HOZAI KK
2002.7.23
JP2004011032-A
Temperature control fiber for clothing, consists of sheath portion formed from polyamide resin and core portion formed from polypropylene-based resin composition containing polypropylene resin and paraffin hydrocarbon
IDEMITSU TECHNOFINE KK ; KANEBO GOSEN KK ; KANEBO LTD
2002.6.3
JP2004058519-A
Blister compact for case for packaging various products, has bottom raising provided at deep drawing portion which is formed by pressure forming or thermoforming polylactic acid type sheet
SONY CORP
2002.7.30
JP2004010708-A
Polylactic acid foam for motor vehicle interior material, is obtained by blending polylactic acid resin, decomposing-type organic material foaming agent and swelling inorganic compound
OTSUKA KAGAKU YAKUHIN KK
2002.6.5
JP2004010642-A
Manufacture of biodegradable plastic used as component of motor vehicle, toy and household appliances, comprises molding composition containing preset amount of layered graphite and polylactic acid group polymer
SUZUKI KK
2002.6.4
WO2004020708-A1; JP2004091968-A; JP2004218182-A
Polylactic acid fibers for use for fibrous products such as knitted, woven or nonwoven fabrics and carpets, contains a fatty acid bisamide and/or an alkyl- substituted fatty acid monoamide, to an amount of 0.1 - 5 wt%
TORAY IND INC
2003.9.1;
2002.8.30;
2003.12.16
JP2004010842-A
Polylactic acid composition used as molding materials, comprises polylactic acid and acrylic acid alkylester group oligomer having specific structural unit
IDEMITSU PETROCHEM CO LTD
2002.6.11
JP2004010135-A
Net bag for packaging, has display film layer laminated in front side of welding film layer
DAINIPPON PLASTICS CO LTD
2002.6.7
 
 
 

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