Source: http://www.google.com/patents/US5326966?dq=5,579,517
Timestamp: 2017-09-26 06:12:06
Document Index: 750897817

Matched Legal Cases: ['arts     18', 'arts     23', 'arts     13', 'arts     18', 'arts     18', 'arts     18']

Patent US5326966 - Magnetic card comprising a polyester film, ultra-violet curing ink layer, a ... - Google Patents
The present invention relates to a polyester film having an antistatic highly adhesive layer and a process for producing the film, said layer comprising a copolymer (A) and a (co)polymer (B), said copolymer (A) being obtained by copolymerizing ##STR1## N-methylol acrylamide, and optionally an ethylenic...http://www.google.com/patents/US5326966?utm_source=gb-gplus-sharePatent US5326966 - Magnetic card comprising a polyester film, ultra-violet curing ink layer, a magnetic layer, and an antistatic adhesive layer comprising specified polymers
Publication number US5326966 A
Application number US 07/957,101
Also published as DE69009718D1, EP0435080A1, EP0435080B1, US5182169
Publication number 07957101, 957101, US 5326966 A, US 5326966A, US-A-5326966, US5326966 A, US5326966A
Inventors Masayuki Fukuda, Sadayoshi Miura
Patent Citations (18), Referenced by (23), Classifications (59), Legal Events (4)
Magnetic card comprising a polyester film, ultra-violet curing ink layer, a magnetic layer, and an antistatic adhesive layer comprising specified polymers
US 5326966 A
1. A magnetic card comprising an antistatic adhesive film, an ink layer made of an ultra-violet-curing ink and a magnetic layer, both of said layers being provided on the adhesive film, wherein the adhesive film comprises a polyester film and an antistatic adhesive layer provided on at least one side of the polyester film, said adhesive layer comprising a copolymer (A) and a polymer (B) at a weight ratio of 95:5 to 50:50, the copolymer (A) having a second order transition temperature (Tg) of 10°-80° C. and being obtained by copolymerizing
(a) 70-99% by weight of a compound represented by the following formula (I) ##STR11## wherein R1 is a hydrogen atom or a methyl group; and R2 is --COOR3 in which R3 is a straight or branched alkyl group of 1-20 carbon atoms), or R2 is ##STR12## or --C.tbd.N, (b) 1-10% by weight of the compound N-methylol(meth)acrylamide,
(c) 0-5% by weight of an ethylenic compound having a carboxy group in the molecule, other than the compound (I), and
(d) 0-29% by weight of another compound copolymerizable with the compounds of (a) to (c), the total of the compounds of (a) to (d) being 100% by weight,
and the copolymer (B) having the molecular weight of 5,000 or more and being obtained by polymerizing or copolymerizing
(e) 30-100% by weight of a compound represented by the following formula (II) ##STR13## wherein R4, R5 and R6 are independently a hydrogen atom or a lower alkyl group; R7 is a bivalent organic group; X is an alkali metal or --NH(R8)3 in which R8 is a hydrogen atom or a lower alkyl group; and n is 0 or 1, and
(f) 0-70% by weight of another compound copolymerizable with the compound (e), the total of the compounds of (e) and (f) being 100% by weight.
2. The magnetic card according to claim 1, wherein the antistatic highly adhesive layer comprises the copolymer (A) obtained by copolymerizing 75-95 % by weight of the compound (a), 3-6% by weight of N-methylol(meth)acrylamide (b), 0.5-3% by weight of the ethylenic compound (c) and 0-29% by weight of the compound (d), and the polymer (B) obtained by copolymerizing 30-80% by weight of the compound (e) and 20-70% by weight of the compound (f), at a weight ratio of 90:10 to 0:30.
1. an antistatic highly adhesive film comprising a polyester film and an antistatic highly adhesive layer provided on at least one side of the polyester film, said layer comprising a copolymer (A) and a polymer (B) at a weight ratio of 95:5 to 50:50, the copolymer (A) having a second order transition temperature (Tg) of 10°-80° C. and being obtained by copolymerizing
2. a process for producing an antistatic highly adhesive film, which comprises coating, on at least one side of a polyester film which has not completed orientation and crystallization, an aqueous dispersion comprising a copolymer (A) and a polymer (B) at a weight ratio of 95:5 to 50:50, the copolymer (A) having a second order transition temperature (Tg) of 10°-80° C. and obtained by copolymerizing
The copolymer (A) as an adhesivity-imparting component is a copolymer having a second order transition temperature (Tg) of 10°-80° C. and is obtained by copolymerizing
In the present invention, the copolymer (A) has a second order transition temperature (Tg) of 10°-80° C., preferably 20°-60° C. When the second order transition temperature is less than 10° C., it is difficult to obtain adhesivity intended by the present invention, to ultraviolet-curing resins representative of acrylic resins, particularly adhesivity to shear force. When the second order transition temperature is more than 80° C., no sufficient film strength is obtained owing to poor film-formability, etc. and it is difficult to obtain the effect intended by the present invention.
A cellotape manufactured by Nichiban, of 18 mm in width is attached onto the above ultraviolet ink layer, and 180° reverse peeling is conducted at a high speed of 100 m/min. The condition of peeling is observed and adhesivity is expressed by the peeling load (g/18 mm) obtained.
Cuts of checker pattern are formed on the ultraviolet ink layer with a cutting knife. A cellotape is attached thereonto, and 90° normal peeling is conducted. The condition of peeling is expressed in five levels of 5 to 1 (5 is good and 1 is poor).
A film is allowed to stand for 24 hours under conditions of 23° C.×50% R. H. and then measured for surface resistivity by a vibrating capacitor type potentiometer (TR-84M manufactured by Takeda Riken). Antistaticity is expressed by the surface resistivity obtained.
A film is allowed to stand for 24 hours under conditions of 23° C.×50% R. H. The resulting film is electrified by a static honestmeter (S-5109 manufactured by Shishido Electrostatic Ltd.) and the reduction of the charged amount is examined. Antistaticity is expressed by the half-life (sec) of the charge amount.
A polyethylene terephthalate having an intrinsic viscosity of 0.55 as measured at 25° C. in o-chlorophenol, containing 10% by weight of anatase titanium oxide of 0.2 μ in average particle diameter and 1% by weight of silica of 4 μ in particle diameter was melt-extruded from a T die. The extrudate was cooled on a drum of 40° C. with static electricity being applied, to obtain a non-stretched film of 1.8 mm in thickness. Subsequently, the film was heated to 90° C. and stretched 3.0-fold lengthwise. On the resulting uniaxially stretched film was coated, by kiss coating, one of the aqueous coating solutions (solid content=2% by weight) whose solid compositions were shown in Table 1. The amount coated (wet amount) was 4 g (coating solution)/m2.
The coated film was crosswise stretched 3.2-fold at 110° C. and heat-treated at 220° C. to obtain various biaxially oriented (antistatic highly adhesive) polyester films of 188 μm in thickness.
TABLE 1______________________________________  Adhesivity-             Antistaticity-  imparting  imparting    Nonionic  component (A)*1             component (B)*1                          surfactant______________________________________Example 1    Copolymer 1  Copolymer 3  Nonion    75 parts     18 parts     NS-208.5*2                              5 partsExample 2    Copolymer 1  Copolymer 3  Nonion    70 parts     23 parts     NS-208.5*2                              5 partsExample 3    Copolymer 1  Copolymer 3  Nonion    80 Parts     13 parts     NS-208.5*2                              5 partsExample 4    Copolymer 2  Copolymer 3  Nonion    75 parts     18 parts     NS-208.5*2                              5 partsExample 5    Copolymer 1  Copolymer 4  Nonion    75 parts     18 parts     NS-208.5*2                              5 partsExample 6    Copolymer 1  Copolymer 5  Nonion    75 parts     18 parts     NS-208.5*2                              5 partsComparative    Copolymer 1  Not used     NonionExample 1    95 parts                  NS-208.5*2                              5 partsComparative    Not used     Copolymer 3  NonionExample 2             95 parts     NS-208.5*2                              5 partsComparative    Not used     Not used     Not usedExample 3______________________________________ *1 The compositions of the copolymers 1  to 5 are shown in Table 2. *2 Manufactured by Nippon Oil & Fats Co., Ltd.
TABLE 3______________________________________Adhesivity             AntistaticityEvalua-      Evalua-  Evalua-  Evalua-                                 Evalua-tion (1)     tion (2) tion (3) tion (1)                                 tion (2)______________________________________Example 1   620      4        4      1 × 1012                                   10Example 2   580      4        3      8 × 1011                                    5Example 3   610      4        4      7 × 1012                                   30Example 4   570      4        5      3 × 1012                                   10Example 5   640      4        5      8 × 1011                                    5Example 6   590      4        4      3 × 1012                                   10Compara-   580      4        5      1015 <                                   Nottive                                    reducedExample 1Compara-   100      2        2      8 × 1010                                   <1Example 2Compara-    20      1        1      1015 <                                   NotExample 3                               reduced______________________________________
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U.S. Classification 235/493, G9B/5.28, G9B/5.283, 428/480, 283/904, 428/847.5, 428/900, 428/355.0AC, 283/82, 428/343, 360/2, 428/355.0CN, 428/922, 428/355.00R
International Classification G11B5/80, B32B7/02, B32B7/12, B32B33/00, B42D15/10, G11B5/738, C09D5/23, B29K67/00, C09D133/04, B29C55/02, C09D133/08, B32B27/36, B29L9/00, C09J7/02, C09J141/00, C09J133/06, G11B5/72, G11B5/73, C08J7/04, C08L41/00
Cooperative Classification Y10T428/31786, Y10T428/28, Y10T428/2891, Y10T428/2878, Y10T428/2852, Y10T428/2887, Y10S428/922, Y10S428/90, Y10S283/904, C08J2367/02, C09J141/00, C09J7/0285, C08L41/00, G11B5/73, C09J7/0217, G11B5/72, C09J133/062, C08J7/047
European Classification C08J7/04L, C09J141/00, C09J133/06B, G11B5/73, G11B5/72, C09J7/02F2D, C09J7/02K9B4B