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11. 发明专利

JPH0324952A MULTILAYER PACKAGE 失效
公开(公告)号：JPH0324952A
公开(公告)日：1991-02-01
申请号：JP16118889
申请日：1989-06-23
申请人： KURARAY CO
发明人： HARITA SHIGEYUKI , HIROFUJI SATOSHI , FUKUTOME SUSUMU , MATSUMOTO JUNICHI , MOTOISHI YASUO
IPC分类号： B32B27/28 , B29C65/02 , B65D65/40
摘要： PURPOSE:To obtain good gas barrier properties, low temp. sealability and heat- sealing strength by forming each of innermost layers from a saponified ethylene/ vinyl acetate copolymer layer specified in silane content, the saponification degree of a vinyl acetate component and ethylene content and mutually heat- sealing the innermost layers. CONSTITUTION:A saponified ethylene/vinyl acetate copolymer layer wherein silane content is 0.0005 - 0.2mol%, the saponification degree of a vinyl acetate component is 96mol% or more and ethylene content is 25 - 60mol% obtained by saponifying a copolymer of ethylene, vinyl acetate and a vinylsilane compound is used as the innermost layer and the innermost layers are mutually heat-sealed. When silane content is below 0.0005mol%, low temp. heat sealability is insufficient and, when exceeds 0.2mol%, a heat non-melting property appears. When ethylene content is below 25mol%, low temp. heat sealability is insufficient and, when exceeds 60mol%, gas barrier properties, fragrance retentivity and oil resistance are lowered. Further, when the saponification value of the vinyl acetate component is below 96mol%, gas barrier properties, fragrance retentivity, oil resistance and heat stability at the time of melt molding are lowered.

12. 发明专利

JPH035143A HEAT-SHRINKABLE FILM 失效
公开(公告)号：JPH035143A
公开(公告)日：1991-01-10
申请号：JP14019989
申请日：1989-05-31
申请人： KURARAY CO
发明人： WATANABE TOMOYUKI , NEGI TAICHI , HIROFUJI SATOSHI , YAMASHITA SADAO
IPC分类号： B32B27/28 , B29C55/12 , B29C61/06 , B29K105/02 , B29L7/00 , B29L9/00 , C08J5/18
摘要： PURPOSE:To improve play-separation resistance after heat shrinkage by using an ethylene-vinyl acetate copolymer saponifying substance (EVOH) having a saponification value at a specific ratio as a gas barrier layer, laminating thermoplastic polyurethane (TPU), which has excellent adhesive properties with EVOH, superior biaxial orientation properties and heat shrinkability and specific thickness and the range of a constituent composition of which is limited, on both sides of the EVOH and manufacturing a biaxially oriented laminate. CONSTITUTION:A heat-shrinkable film, at least one surface of an EVOH(A) layer of which has a TPU(B) layer and which satisfies formulae (I)-(V), is manufactured. In formulae (a) represents the ethylene content(mol%) of A, (b) the thickness (mum) of a layer A, (c) the nitrogen content (weight %) of B, (d) the thickness(mum) of a layer B, (e) a heat shrinkage factor (%), and (f) the inter-layer adhesive strength(g/15 mm) of the layer A and the layer B. An ethylene-vinyl acetate copolymer saponifying substance having 25-55 mol % ethylene content and not less than 96% saponification value of a vinyl acetate component is used as EVOH. It is more favorable that the EVOH contains a 0.0005-0.2mol% silicon compound unit in a molecule thereof. EVOH having the silicon compound unit within the range of 0.0005-0.2mol% is employed as EVOH, thus further improving ply-separation resistance and flexing resistance.

13. 发明专利

JPH02261847A COMPOSITION AND MULTI-LAYERED STRUCTURE 失效
公开(公告)号：JPH02261847A
公开(公告)日：1990-10-24
申请号：JP8210989
申请日：1989-03-31
申请人： KURARAY CO
发明人： NEGI TAICHI , HIROFUJI SATOSHI
IPC分类号： B32B27/28 , C08F16/02 , C08F216/06 , C08L23/08 , C08L29/02 , C08L29/04
摘要： PURPOSE:To obtain a compsn. free from occurrence of crack, pinhole, etc., when it is secondarily treated and gas barrier properties by compounding plurality of specified ethylene-vinyl alcohol copolymers. CONSTITUTION:An ethylene-vinyl alcohol copolymer (hereinbelow described as EVOH) compsn. with a mean ethylene content of 20 to 60mol% and two or more endothermic peaks in DSC measurement and satisfying furthermore formulas I to IV is obtd. by compounding 2 or more EVOH copolymers with different ethylene contents. In said formulas, W1 is an EVOH with the max. ethylene content and W2 is an EVOH with the min. ethylene content; MP1 content MP2 are each the min. or the max. endothermic peak temp. when DSC measurements of the EVOH compsn. are performed; (mp1) and (mp2) are each the min. or the max. endothermic peak temp. when DSC measurements of the resin obtd. by resaponification of said compsn. are performed; S1 and S2 are each an area corresponding to the peak temp. MP1 or MP2 when DSC measurements of said compsn. are performed MFI(0) and MFI(2) are each a melt viscosity of said compsn. after 0 or 2hr from the beginning when said compsn. is heated at 220 deg.C in the presence of N2.

14. 发明专利

JPH02258341A MULTI-LAYER STRUCTURE 失效
公开(公告)号：JPH02258341A
公开(公告)日：1990-10-19
申请号：JP8211189
申请日：1989-03-31
申请人： KURARAY CO
发明人： WATANABE TOMOYUKI , NEGI TAICHI , HIROFUJI SATOSHI , YAMASHITA SADAO
IPC分类号： B32B27/28 , B32B27/40
摘要： PURPOSE:To manufacture a multi-layer structure of improved resistance to through-pin holes generated by flexing fatigue, resistance to gas barrier layer pinholes by providing a thermoplastic polyurethane layer at least on one surface of an ethylene - vinyl acetate copolymer saponified layer having specified ethylene content and saponification degree and satisfying a specified formula. CONSTITUTION:A thermoplastic polyurethane layer (B) is laminated directly at least on one surface of an ethylene - vinyl acetate saponified material layer (A), a multi-layer structure to satisfy formulae I - V manufactured by the coextrusion method when specifying the ethylene content of the layer (A) as mol % (a), the thickness of the layer as bmu, content N of the layer (B) as c weight % and the thickness of layer as dmu, and further hydrogen ion concentration pH of (A) as e, and alkali metal ion concentration of (A) as fppm. Resistance to through-pinholes and resistance to gas barrier layer pinholes can be improved by said arrangement. The ethylene content of the ethylene - vinyl acetate saponified material is 20 - 60mol %, and saponification degree of vinyl acetate is 90% or more.

15. 发明专利

JPH02235952A COMPOSITION, AND MULTILAYERED CONTAINER AND PACKAGING MATERIAL 失效
公开(公告)号：JPH02235952A
公开(公告)日：1990-09-18
申请号：JP5758189
申请日：1989-03-08
申请人： KURARAY CO
发明人： AOYAMA AKEMASA , KATAYAMA TETSUYA , MORIYA TAKESHI , YAMAUCHI JUNNOSUKE , HIROFUJI SATOSHI
IPC分类号： B32B27/28 , B65D1/28 , B65D85/72 , C08K3/10 , C08K3/32 , C08K5/09 , C08K5/098 , C08K13/02 , C08L23/26 , C08L29/04
摘要： PURPOSE:To prepare a compsn. which generates little odorous component, is excellent in the heat stability, and is suitable as packaging material for a liq. food or drink by mixing an alkali metal acetate and phosphoric acid or an alkali metal hydrogenphosphate each in a specified amt. into a saponified ethylene-vinyl acetate copolymer. CONSTITUTION:An alkali metal acetate in an amt. corresponding to 20 to 200ppm said alkali metal, 30 to 250ppm acetic acid, and phosphoric acid or an alkali metal hydrogenphosphate in an amt. corresponding to 5 to 500ppm phosphoric acid are mixed into a saponified ethylene-vinyl acetate copolymer in such a way that the ratio of the content of said acetic acid to the content of the acetic acid combined with said alkali metal acetate is 0.1-1, thus giving a compsn. which has an ethylene content of 20 to 80mol% and a degree of saponification of vinyl acetate units of 95mol% or higher, and which, when tested with a Koka flow tester, exhibits a flow rate remaining substantially unchanged for at least 10hr during heating at least at a temp. in the range of 10-80 deg.C higher than its m.p.

16. 发明专利

JPH02139237A MULTI-LAYERED CONTAINER 失效
公开(公告)号：JPH02139237A
公开(公告)日：1990-05-29
申请号：JP29511888
申请日：1988-11-21
申请人： KURARAY CO
发明人： NEGI TAICHI , HIROFUJI SATOSHI
IPC分类号： B65D1/00 , B32B27/00 , B32B27/08 , B32B27/28 , B32B27/36 , B65D1/02
摘要： PURPOSE:To improve the aging change in thickness and picking height of an EVOH layer in a multi-layered structure molded by a multi cavity mold, by setting a specific relation between two kinds of EVOH (saponified substance of ethylene-vinyl acetate copolymer) which constitute an intermediate layer of said multi-layered structure and have respectively restricted containing am ount of ethylene, saponification degree of vinyl acetate components and melt index(MI). CONSTITUTION:The present container consists of an inner and an outer layers formed of thermoplastic polyester and an intermediate layer formed of a com pound composed of at least two kinds of saponified substances of ethylene-vinyl acetate copolymer. This intermediate layer formed of two kinds a EVOH contains 20-60mol% of ethylene, with the saponification degree of components of vinyl acetate of not smaller than 90% and the melt index of 0.1-100g/10min. Supposing that the EVOH having a higher MI is saponified substance (A) of ethylene-vinyl acetate copolymer and the other EVOH having a lower MI is a saponified substance (B) of ethylene-vinyl acetate copolymer, the compound should be constituted such that equations (I)-(IV) are satisfied and moreover, the mixing ratio (weight) (A)/(B) is 95/5-5/95.

17. 发明专利

JPH0292541A MULTI-LAYER STRUCTURAL BODY 失效
公开(公告)号：JPH0292541A
公开(公告)日：1990-04-03
申请号：JP24531788
申请日：1988-09-28
申请人： KURARAY CO
发明人： NEGI TAICHI , HIROFUJI SATOSHI
IPC分类号： B65D65/40 , B32B27/28 , B32B27/32
摘要： PURPOSE:To improve reliability in gas barrier properties with favorable external appearance, by a method wherein the title structural body is made a multi-layer structural body having a fixed structure possessing a layer of a copolymeric saponification product of ethylene-vinyl acetate having a specific composition and a layer of polypropylene resin. CONSTITUTION:A matter whose ethylene content is 20-30mol% and degree of saponification is at least 90% is used as a copolymeric saponification product EVOH of ethylene-vinyl acetate and a high-polymerization degree PP is most suitable as polypropylene PP. Orientation tension is gained by blending high- polymeric-degree and high-density polyethylene or high-polymeric-degree and low-density polyethylene with the PP. In this instance, the PP and EVOH are selected so that a formula is satisfied. Hereupon, (a) is melt orientation tension of a multi-layer structural body measured at a temperature higher by 30 deg.C than a main former heat peak temperature based on DSC of the EVOH and E is ethylene content of the EVOH. The multi-layer structural body is not limited especially in a manufacturing method, for example, of a sheet and a multi-layer sheet is obtained with dry ramie or extruded ramie.

18. 发明专利

JPH01204736A CO-INJECTION STRETCHED MULTILAYER PLASTIC CONTAINER 失效
公开(公告)号：JPH01204736A
公开(公告)日：1989-08-17
申请号：JP2930588
申请日：1988-02-10
申请人： KURARAY CO
发明人： NEGI TAICHI , HIROFUJI SATOSHI
IPC分类号： B65D1/00 , B32B27/08 , B32B27/28
摘要： PURPOSE:To prevent interlaminar delamination due to an impact, by forming the intermediate layer, which is positioned between inner and outer surface layers composed of thermoplastic polyester (D), from a composition (C) prepared by compounding a specific saponified resin (B) with a specific saponified ethylene/vinyl acetate copolymer (A). CONSTITUTION:An EVOH composition (C), which is prepared by blending 5-40 pts.wt. of an ethylene/vinyl acetate copolymer and/or a saponified ethylene/vinyl acetate copolymer (B) satisfying formulae (I)-(IV) with 100 pts.wt. of a saponified ethylene/vinyl acetate copolymer [EVOH(A)], is used in the intermediate layer sealed between inner and outer surface layers composed of thermoplastic polyester (PES). In the formulae (I)-(IV), MI(A) and MI(B) are the melt index values (2160g, 190 deg.C) (g/10min) of the resins (A), (B), MP(A) and MP(B) are the melting or softening points ( deg.C) of the resins (A), (B), CH(A) and CH(B) are the C2H4 contents (mol%) of the resins (A), (B), and DS(A) and DS(B) are the saponification degrees (%) of the resins (A), (B).

19. 发明专利

JPH01182023A CO-INJECTION ORIENTATION BLOW MOLDED CONTAINER 失效
公开(公告)号：JPH01182023A
公开(公告)日：1989-07-19
申请号：JP729188
申请日：1988-01-15
申请人： KURARAY CO
发明人： NEGI TAICHI , HIROFUJI SATOSHI
IPC分类号： B29C49/06 , B29C49/08 , B29C49/22 , B29K67/00 , B29L22/00 , B32B27/28
摘要： PURPOSE:To improve release properties between shock-resistant layers by providing a composition consisting of thermoplastic polyester inner and outer surface layers, and an intermediate layer having specific components. CONSTITUTION:The subject container comprises inner and outer surface layers of thermoplastic polyester (D) and an intermediate layer, which is composed of a saponified matter (A) of ethylene-vinyl acetate copolymer wherein ethylene content is 20-60mol%, saponification degree of vinyl acetate is at least 95% and a metalcontaining polyester thermoplastic resin (B) which satisfies formula I, blended in 5-40 pts.wt. based on 100 pts.wt. of the saponified matter (A), and is heat-treated at temperature shown by formula II. The thermoplastic polyester (D) is a compound containing 1-20 pts.wt. of resin (B) based on 100 pts.wt. of thermoplastic polyester; the resin (B) is a thermoplastic polyester containing 0.5-5mol of one or more elements selected from the group of Al, Cr, Sn, Ge and Si based on 100mol of dicarboxylic acid component.

20. 发明专利

JPH01176554A CO-INJECTION STRETCHED MULTILAYER PLASTIC CONTAINER 失效
公开(公告)号：JPH01176554A
公开(公告)日：1989-07-12
申请号：JP33582587
申请日：1987-12-29
申请人： KURARAY CO
发明人： NEGI TAICHI , HIROFUJI SATOSHI
IPC分类号： B65D1/00 , B32B27/28
摘要： PURPOSE:To improve impact resistance interlaminar releasability to a large extent, by subjecting thermoplastic polyester becoming inner and outer surface layers and an ethylene/vinyl acetate copolymer saponified composition becoming an intermediate layer to co-injection molding. CONSTITUTION:Thermoplastic polyester D becoming inner and outer surface layers and a composition C wherein 5-40 pts.wt. of a polyamide-ester type thermoplastic resin B satisfying formulas I, II is compounded with 100 pts.wt. of an ethylene/vinyl acetate copolymer saponified substance A containing 28-60mol.% of ethylene and having the saponification degree of a vinyl acetate component of 95% or more becoming an intermediate layer are subjected to co-injection stretching. In the formulas I, II, MI, (A) is the melt index of a resin 4, MI,(B) is the melt index of a resin B, MP,(A) is the m.p. ( deg.C) of the resin A, MP,(B) is the m.p. or softening point ( deg.C) of the resin B. The thermoplastic polyester D is a composition wherein 1-20 pts.wt. of the polyamide-ester type thermoplastic resin B is contained per 100 pts.wt. of thermoplastic polyester.

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