GB2039785A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Pressure sensitive adhesive products and the method for preparation of the same
Assignee: Sanyo Kokusaku Pulp Co Ltd
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Filing: 1979-10-31
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Granted: —
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Expires: 1999-10-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 01:54
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/201; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; C09J2423/00; C09J2423/005; C09J2423/16; C09J2423/165; C09J2433/00; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/1168; Y10T156/1195; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/28; Y10T428/2839; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
A pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, in which a release layerA comprises a polyolefinic elastomer a having a shearing modulus of less than 2.0 x 101 dyne/cm' according to JIS K 7213 test, surface wettability expressed in terms of an equilibrium contact angle of more than 550 with respect to'a standard liquid 10 having a surface tension of 50 dyne/cm and used in JIS K 6768 test under the conditions of 20 1 IC and 65 5% RH and a thickness of at least 1 micron, and a pressure sensitive adhesive layer F comprising as a main component a polyacrylate, said release layer being kept in contact with said adhesive layer over a given area to form a composite or integral layer thereof.
Claim 2
Dependent Claim
134 words
A pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, in which a release layerA comprises a polyolefinic elastomer a having a shearing modulus of less than 2.0 x 101 dyne/cm' according to JIS K 7213 test, surface wettability expressed in terms of an equilibrium contact angle of more than 550 with respect to'a standard liquid 10 having a surface tension of 50 dyne/cm and used in JIS K 6768 test under the conditions of 20 1 IC and 65 5% RH and a thickness of at least 1 micron, and a pressure sensitive adhesive layer F comprising as a main component a polyacrylate, said release layer being kept in contact with said adhesive layer over a given area to form a composite or integral layer thereof.
Claim 3
Dependent Claim
74 words
A product as claimed in Claim 1, in which said polyolefinic elastomer a forming said release 15 layerA is composed mainly of an ethylene - alpha olefin copolymer having a density of 0.80 to 0.90 g/cm', a brittle temperature of lower than -701C according to ASTM D 764 test, a melting point of lower than 800C according to differential thermal analysis and a hardness of lower than 80 according to JIS K 6301 test.
Claim 4
Dependent Claim
22 words
A product as claimed in Claim 1 or, in which said copolymer of ethylene/alpha olefin is a.20 random copolymer of ethylene-1 -butene.
Claim 5
Dependent Claim
21 words
A product as claimed in Claim 1 or 2, in which said copolymer of ethylene/alpha olefin is a copolymer of ethylene/propylene.
Claim 6
Dependent Claim
32 words
A product as claimed in Claim 1 or 2, in which said copolymer of ethylene/alpha olefin is a mixture of a random copolymer of ethylene-1 -butene and a copolymer of ethylene/propylene. 25
Claim 7
Independent Claim
181 words
A method of preparing a pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, which comprises co-extruding a release layerA consisting of a polyoleflnicelastomer a having a shearing modulus of less than 2.0 x 1011 dyne/cM2 according to jig k 7213 test aridsurface wettab-11-ity expressed-in -terms of an e. quilibrium contact an-g-le of m. ore than 550 with respect to a standard liquid having a surface tension of 50 dyne/cm and used in JIS K 6768 30 test under the conditions of 20 1 OC and 65 5% RH and a resin b forming a reinforcing interlayer B for increasing the adhesion between a backing substrate and said release layerA such that said elastomer is coated to a thickness of at least 1 micron, whereby said elastomer a forming said release layerA is bonded to said substrate through said reinforcing interlayer B, and said elastomer a forming said release layer is kept in contact with a pressure sensitive adhesive layer F over a given area to form a 35 composite or integral layer thereof.
Claim 8
Independent Claim
181 words
A method of preparing a pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, which comprises co-extruding a release layerA consisting of a polyoleflnicelastomer a having a shearing modulus of less than 2.0 x 1011 dyne/cM2 according to jig k 7213 test aridsurface wettab-11-ity expressed-in -terms of an e. quilibrium contact an-g-le of m. ore than 550 with respect to a standard liquid having a surface tension of 50 dyne/cm and used in JIS K 6768 30 test under the conditions of 20 1 OC and 65 5% RH and a resin b forming a reinforcing interlayer B for increasing the adhesion between a backing substrate and said release layerA such that said elastomer is coated to a thickness of at least 1 micron, whereby said elastomer a forming said release layerA is bonded to said substrate through said reinforcing interlayer B, and said elastomer a forming said release layer is kept in contact with a pressure sensitive adhesive layer F over a given area to form a 35 composite or integral layer thereof.
Claim 9
Dependent Claim
25 words
A method as claimed in Claim 6, in which said resin b forming said reinforcing interlayer B is a low-density polyethylene or its derivative. '
Claim 10
Dependent Claim
55 words
A method as claimed in Claim 6 or Claim 7, in which said polyolefinic elastomer a is extruded at a temperature of 180 to 2901C prevailing at the outlet of die lips, and said resin b forming said reinforcing interlayer extruded at a temperature of 260 to 33011C prevailing at the outlet of die lips.
Claim 11
Dependent Claim
149 words
A pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, in which a release layerA + c has a thickness of at least 1 micron and comprises a resin mixture a + c of a polyolefinic elastomer a having a shearing modulus of less than 2.0 x 101 dyne/cm' according to JIS K 7213 test, surface wettability expressed in terms of an equilibrium contact angle of more than 55" with respect to a standard liquid having a surface tension of dyne/cm and used in JIS K 6768 test under the conditions of 20 1 IC and 65 5% RH and a polyethylene c added thereto, and a pressure sensitive adhesive layer F contains a polyacrylate as a main component, said release layer being kept in contact with said adhesive layer over a given area to form a composite or integral layer thereof.
Claim 12
Dependent Claim
149 words
A pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, in which a release layerA + c has a thickness of at least 1 micron and comprises a resin mixture a + c of a polyolefinic elastomer a having a shearing modulus of less than 2.0 x 101 dyne/cm' according to JIS K 7213 test, surface wettability expressed in terms of an equilibrium contact angle of more than 55" with respect to a standard liquid having a surface tension of dyne/cm and used in JIS K 6768 test under the conditions of 20 1 IC and 65 5% RH and a polyethylene c added thereto, and a pressure sensitive adhesive layer F contains a polyacrylate as a main component, said release layer being kept in contact with said adhesive layer over a given area to form a composite or integral layer thereof.
Claim 13
Dependent Claim
55 words
A product as claimed in Claim 9, in which said polyolefinic elastomer a is composed mainly of an ethylene-alpha olefin copolymer having a density of 0.80 and 0.90 g/cm', a brittle temperature of lower than -700C according to ASTM D 764 test and a melting point of lower than 8011C according to differential thermal analysis.
Claim 14
Dependent Claim
20 words
A product as claimed in Claim 10, in which said copolymer of ethylene/alpha olefin is a 55 copolymer of ethylene/propylene.
Claim 15
Dependent Claim
21 words
A product as claimed in Claim 10, in which said copolymer of ethylene/alpha olefin is a random copolymer of ethylene-1 -butene.
Claim 16
Dependent Claim
29 words
A product as claimed in Claim 9, in which said polyethylene c has an average molecular weight of more than 10,000 and a density of 0.91 to 0.97 g/cm'.
Claim 17
Independent Claim
219 words
A method of preparing a pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, which comprises co- extruding a release layerA + c composed of a resin mixture a + c of a polyolefinic elastomer a having a shearing modulus of less than 2.0 x 108 dyne/cM2 according to JIS K 7213 test and surface wettability expressed in terms of an 60. 28 GB 2 039 785 A 28 equilibrium contact angle of more than 551 with respect to a standard liquid having a surface tension of 50 dyne/cm and used in JIS K 6768 test under the conditions of 20 1 OC and 65 5% RH and a polyethylene c added thereto and a resin b forming a reinforcing interlayer B for increasing the adhesion between a backing substrate and said release layerA + c such that said resin mixture a + c is coated to a thickness of at least 1 micron, whereby said resin mixture a + c forming said release layer is bonded to said substrate through said esin b forming said interlayer, and said release layel-A + c consisting of said resin mixture a + c is kept in contact with said adhesive layer F over a given area to form a composite or integral layer thereof.
Claim 18
Independent Claim
219 words
A method of preparing a pressure sensitive adhesive product having one or more release layers and a pressure sensitive adhesive layer, which comprises co- extruding a release layerA + c composed of a resin mixture a + c of a polyolefinic elastomer a having a shearing modulus of less than 2.0 x 108 dyne/cM2 according to JIS K 7213 test and surface wettability expressed in terms of an 60. 28 GB 2 039 785 A 28 equilibrium contact angle of more than 551 with respect to a standard liquid having a surface tension of 50 dyne/cm and used in JIS K 6768 test under the conditions of 20 1 OC and 65 5% RH and a polyethylene c added thereto and a resin b forming a reinforcing interlayer B for increasing the adhesion between a backing substrate and said release layerA + c such that said resin mixture a + c is coated to a thickness of at least 1 micron, whereby said resin mixture a + c forming said release layer is bonded to said substrate through said esin b forming said interlayer, and said release layel-A + c consisting of said resin mixture a + c is kept in contact with said adhesive layer F over a given area to form a composite or integral layer thereof.
Claim 19
Dependent Claim
25 words
A method as claimed in Claim 14, in which said resin b forming said reinforcing interlayer B is 10 a low-density polyethylene or its derivative.
Claim 20
Dependent Claim
50 words
A method as claimed in Claim 15, in which said resin mixture a + c is extruded at a temperature of 200 to 2901C prevailing at the outlets of die lips, and said resin b extruded at a temperature of 260 to 3301C prevailing at the outlets of die lips.
Claim 21
Dependent Claim
63 words
A pressure sensitive adhesive product as claimed in Claim 1 and substantially as described with reference to the accompanying drawings or in anyone of the specific examples hereinbefore is set forth. Printed for Her Majesty's Stationery Office by the Courier Press. Leamington Spa, 1980. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1jAY, from which copies may be obtained. a 1
References Cited (Backward Citations)
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