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EP0571000B1 - Verpackungsmaterial für lichtempfindliche Materialien - Google Patents

Verpackungsmaterial für lichtempfindliche Materialien Download PDF

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Publication number
EP0571000B1
EP0571000B1 EP93113105A EP93113105A EP0571000B1 EP 0571000 B1 EP0571000 B1 EP 0571000B1 EP 93113105 A EP93113105 A EP 93113105A EP 93113105 A EP93113105 A EP 93113105A EP 0571000 B1 EP0571000 B1 EP 0571000B1
Authority
EP
European Patent Office
Prior art keywords
film
resin
resin film
layer
film layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93113105A
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English (en)
French (fr)
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EP0571000A1 (de
Inventor
Mutsuo Akao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP63018767A external-priority patent/JPH07110516B2/ja
Priority claimed from JP8814288A external-priority patent/JPH01260438A/ja
Priority claimed from JP1988079536U external-priority patent/JPH0643801Y2/ja
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of EP0571000A1 publication Critical patent/EP0571000A1/de
Application granted granted Critical
Publication of EP0571000B1 publication Critical patent/EP0571000B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C3/00—Packages of films for inserting into cameras, e.g. roll-films, film-packs; Wrapping materials for light-sensitive plates, films or papers, e.g. materials characterised by the use of special dyes, printing inks, adhesives

Definitions

  • This invention relates to packaging materials for photosensitive materials.
  • Packaging bags capable of shielding completely from light are used for packaging the articles or the materials which lose commercial values by exposing to light, such as photosensitive materials.
  • the packaging bags are necessary to have sufficient physical strength, such as tensile strength, tear strength and impact puncture strength, according to the size and weight of the materials to be packaged, as well as the above light-shielding ability.
  • suitable heat sealing properties are necessary, and in order to prevent static electrification due to the friction between the photosensitive materials and the packaging bag, antistatic property is also necessary.
  • the packaging materials used for such a packaging bag there is a laminated film composed of a high pressure branched low density polyethylene (LDPE) resin film layer containing a light-shielding material, an aluminum foil layer and a bleached kraft paper layer laminated successively each through an LDPE resin extrusion adhesive layer.
  • LDPE high pressure branched low density polyethylene
  • single layer films are difficult to satisfy the various properties required as the packaging material for photographic photosensitive materials, and only a thick light-shielding LDPE resin single layer film containing carbon black was used for packaging light low photosensitivity photographic photosensitive materials placed in protective pad papers and for packaging light photographic printing papers.
  • the packaging material particularly the light-shielding heat seal bag, for packaging a roll of a photographic photosensitive material and sheets of a photosensitive material having a weight of heavier than 1 kg
  • the inventor has already disclosed the laminated film composed of a cross laminated film using uniaxially stretched high density polyethylene (HDPE) resin films having a great physical strength and a LDPE resin film containing at least either a light-shielding material or an antistatic agent (US-A-4,147,291).
  • the inventor has also disclosed an inexpensive cross laminated film where heat sealing properties and light-shielding ability are improved (US-A-4,258,848).
  • the inventor has disclosed other packaging materials, composed of a laminated film containing a light-shielding film layer composed of linear low density polyethylene (L-LDPE) resin blended with carbon black, having a great physical strength, being excellent in heat sealing properties, and being inexpensive (US-A-4,701,359; Japanese Patent KOKAI No. 18547/1987).
  • L-LDPE linear low density polyethylene
  • the inventor has also disclosed a packaging material for photosensitive materials composed of a metallized film layer and two L-LDPE resin polymer layers containing more than 50 wt. % of L-LDPE resin laminated on both sides of the metallized film layer.
  • One or both of the L-LDPE resin polymer layers contains 0.3 to 30 wt. % of a light-shielding material (US-A-4,663,218).
  • the packaging materials having a cross laminated film disclosed in US-A-4,147,291 and US-A-4,258,848 have a strong physical strength such as tear strength and tensile strength, and they were put to practical use for packaging weight materials up to recently.
  • a uniaxially stretched HDPE resin film is used as the heat seal layer, they are stiff, and inferior in packaging workability and heat sealing properties.
  • the physical strength and heat seal strength varies and curling occurs due to the uneven thickness of an adhesive layer, the uneven draw ratio of the uniaxially stretched HDPE resin films, or the like. Therefore, troubles occurred in processing or packaging process, and occasionally, they were punctured, or the heat sealed portion was separated during transportation.
  • the cross laminated film where a longitudinally uniaxially stretched film was laminated to a laterally uniaxially stretched film so that their orientation axes were crossed each other was expensive, because two kinds of film molding machines were necessary.
  • the packaging materials having a light-shielding L-LDPE resin single layer film disclosed in US-A-4,701,359 or Japanese Patent KOKAI No. 18547/1987 are inexpensive and excellent in heat sealing properties and physical strength such as tear strength and impact puncture strength, they are excellent as the packaging material for photosensitive materials.
  • the light-shielding L-LDPE resin films were occasionally elongated and made thin due to their low Young's modulus, though they were not punctured nor torn. In this case, light-shielding and moistureproofness cannot be secured sufficiently.
  • this packaging material was put to practical use as a laminated film laminated with an aluminum vacuum deposited nylon film or polyester film having a large Young's modulus and heat resistance.
  • the curling of the laminated film was great, and the aluminum vacuum deposited nylon film and polyester film were expensive.
  • the inventor has also developed a coextruded multilayer inflation film comprising an L-LDPE resin film layer and a polyolefin resin film layer, as a film improved in physical strength such as impact puncture strength (Japanese Patent KOKAI No. 62-18548).
  • a coextruded multilayer inflation film is formed by using an inflation film molding machine, such as shown in Figure 1.
  • the inflation film molding machine is composed of extruders 8 heating and kneading the resin, ring die 9 extruding the molten resin from the slit (not indicated) into tube-shaped, blast tube 10 blowing compressed air, air ring 11 cooling the molten resin extruded in tube-shaped, guide rollers 12 guiding the tube-shaped resin film 13, guide plates 14 guiding the tube-shaped resin film 13 into flat, a pair of squeeze roll 15 (nip roll) nipping to attract the tube-shaped resin film 13, and winder 16 winding the film.
  • the white lumps rendered film rupture as well as pressure mark to the film.
  • the L-LDPE resin film layer was disposed on the outside and the HDPE resin film was disposed on the inside, wrinkling and furrows occurred, and the yield of the film decreased.
  • double-sheet bags were used as the packaging bag for relatively heavy large photographic photosensitive materials.
  • a double-sheet bag was, for example, composed of an outer sheet consisting of a Clupak paper, Duostress paper or unbleached kraft paper coated with polyethylene resin by extrusion laminating and an inner sheet consisting of an aluminum foil and two uniform polyethylene resin films containing carbon black laminated on both sides of the aluminum foil.
  • the kind of the packaged product, instructions and the like were printed on the outer surface of the outer sheet during the packaging process or another process.
  • the double-sheet bag is excellent in physical strength, and when the paper of the outer sheet contains a substance harmful for photographic photosensitive materials, its affect can be shielded by the inner sheet being in contact with the photographic photosensitive materials.
  • An example of the laminated film shown in Figure 4 is composed of an aluminum foil layer 27, a bleached kraft paper layer 26 mainly composed of bleached kraft pulp and an LDPE resin film layer 28a blended with a light-shielding material laminated on both sides of the aluminum foil layer 27 each through an adhesive layer 3.
  • the bleached kraft paper layer 26 is disposed on the outside, i.e. the LDPE resin film layer 28a is disposed on the inside.
  • the physical strength of the laminated film is sufficient in the case of light photographic photosensitive materials, but it is insufficient for packaging heavy photographic photosensitive materials. Moreover, fibers occasionally adhered to the packaged photographic photosensitive materials, and caused developing troubles. Photographic photosensitive materials are liable to deteriorate because of utilizing oxidation-reduction reaction and containing a dye liable to degrade by pH, moisture, heat or the like. Therefore, even in the case that it was necessary to use an oxidizing or reducing substance for the surface of the packaging material to touch photographic photosensitive materials, the oxidizing or reducing substance was restricted in the kind and the blending amount. Moreover, unless the quality of the light-shielding material was limited in the particle size, pH, the content of impurities and the like, photographic troubles, such as fogging, spotting trouble and photosensitivity variation, occurred.
  • the object of the invention is to provide a packaging material for photosensitive materials which is a coextruded multilayer inflation film without the occurrence of blocking between the inner layers, pressure mark, abrasion, puncture, wrinkling nor furrowing.
  • a packaging material for photosensitive materials which is a coextruded multilayer inflation film of which the inner surface layer is a polyolefin resin film layer containing 0.5 to 70 wt. % of polyethylene resin having a density of more than 0.936 g/cm 3 .
  • Figure 1 is a schematic front view of an inflation molding machine.
  • Figure 2 is an enlarged sectional view of an inflation film at position A of Figure 1
  • Figure 3 is an enlarged sectional view of the inflation film at position B of Figure 1.
  • Figure 4 is a partially sectional view of a conventional packaging material.
  • the polyolefin resin film layer contains polyethylene resin having a density (ASTM D-1505) of more than 0.936 g/cm 3 , preferably 0.941 to 0.970 g/cm 3 .
  • a density ASTM D-1505
  • the MI ASTM D-1238
  • the MI is preferably more than 0.3 g/10 minutes, further preferably 0.5 to 10 g/10 minutes.
  • film moldability is inferior.
  • the polyethylene resin content of the polyolefin resin film layer is 0.5 to 70 wt. %, preferably 2 to 40 wt. %, further preferably 5 to 30 wt. %. Wnen the content is less than 0.5 wt. %, blocking occurs. While, when the content is beyond 70 wt. %, physical strength decreases. The inner surface layer is too slippery, and wrinkling and furrowing occur.
  • the polyolefin resin film layer may contain other resins, such as L-LDPE resin or LDPE resin.
  • the polyolefin resin film layer may contain either or both of a light-shielding material and a fatty acid compound.
  • the carbon black used is blendable or dispersible in the polyolefin resin. It blocks the transmission of visible and ultraviolet rays, and impart light-shielding property to the polyolefin resin film.
  • the carbon black not only improves the tear strength, impact puncture strength and heat sealing properties of the polyolefin resin film, but also functions to prevent the generation of lumps caused by the oxidation of the resin, to prevent blocking, to adsorp harmful substances such as oxidizing substance, reducing substance and metals.
  • Carbon blacks are divided into gas black, lamp black, vegetable black and animal black according to their origin.
  • oil furnace carbon black having a mean particle size of less than 200 m ⁇ , particularly less than 50 m ⁇ is preferred in terms of light-shielding character, cost, blendability and dispersibility.
  • acetylene black, Ketschen carbon black and graphite have antistatic characteristics, they are also preferred, though they are expensive. They may be blended with the oil furnace carbon black in order to improve its character.
  • Suitable pH of carbon black is at 5 to 9, and suitable mean particle size is 10 to 200 m ⁇ .
  • the oil furnace carbon black having a pH 6 to 9 is preferred. By using the carbon black of such pH and particle size, a packaging material having the following merits is obtained.
  • the occurrence of fogging is rare, increase or decrease of photosensitivity rarely happens, light-shielding ability is great, the lumps of carbon black and pinholes such as fish eyes hardly occur, and the physical strength and heat sealing properties are improved. It is also preferred to improve conductivity by adding metal fiber, carbon fiber, metal powder or the like.
  • the blending method of carbon black into the resin may be carried out by a known method such as the compound coloring method (colored pellets), the liquid color method, the dry color method, the dye color granule method and the masterbatch method, and the dye color granule method and the masterbatch method are preferred in view of cost and the contamination of the working place.
  • a known method such as the compound coloring method (colored pellets), the liquid color method, the dry color method, the dye color granule method and the masterbatch method, and the dye color granule method and the masterbatch method are preferred in view of cost and the contamination of the working place.
  • metal powder is in second place.
  • Metal powder is a light-reflective light-shielding material. It imparts a silver appearance, and it is excellent in moistureproofness, light-shielding, antistatic property, thermal shielding in the sunlight and gas barrier.
  • aluminum powder and its paste are preferable.
  • the paste of aluminum powder is produced by adding mineral spirits and a small amount of a higher fatty acid such as stearic acid or oleic acid to form a paste at the production of aluminum powder according to a known method such as using a ball mill, a stamp mill or an atomizer.
  • a polyolefin thermoplastic resin such as various polypropylene resins, various polyethylene resins, EVA resin, EEA resin and EAA resin, is kneaded together with this aluminum paste while heating, and volatile components mainly mineral spirits are removed by a vacuum pump.
  • This product is used as an aluminum paste compound resin or an aluminum paste masterbatch resin.
  • the aluminum paste masterbatch resin is preferable because it eliminates the noxious smell and bad influences upon the photographic photosensitive materials. In order to eliminate the noxious smell and bad influences upon the photographic photosensitive materials, the content of mineral spirits should be less than 0.1 wt. %.
  • the aluminum paste content of coextruded double layer film is made 2 wt. % by using a masterbatch resin containing 40 wt.
  • the aluminum powder includes microflakes produced from aluminum foil which is crushed by a ball mill or a stamp mill, in addition to usual aluminum powder manufactured by atomizaiton, dropping on a rotary disc or evaporation from melted aluminum. Since aluminum powder is unstable, it is stabilized by a known treatment, such as a surface treatment using a binder or a higher fatty acid.
  • the blending amount of the light-shielding material per an unit area of the inflation film is preferably 0.5 to 50 g/m 2 .
  • the blending method of the light-shielding material may be carried out by a known method, and the masterbatch method is preferable in view of cost and the contamination of the working place. Two or more light-shielding materials may be combined.
  • the fatty acid compound used for blending into the polyolefin resin film layer neutralizes the halide and the like added as the polymerization catalyst of the polyolefin resin which are harmful and adversely affected the photosensitive materials, and thereby makes them harmless.
  • the fatty acid compound improves the dispersibility of carbon black, antiblocking properties, slipping character, and bag-making ability. It also prevents completely the degradation of heat sealing properties by the gradual bleed out of the additives in the polyethylene resin, together with the inhibition by more than 40 wt. % of the L-LDPE resin blended in the resin composition.
  • the fatty acid compound suitable for the invention includes various saturated or unsaturated fatty acids such as oleic acid, stearic acid, lauric acid, ricinoleic acid, naphthenic acid, octylic acid, phthalic acid, adipic acid, sebacid acid, acetylricinoleic acid and maleic acid, fatty acid amides, such as oleic acid amide, erucic acid amide stearic acid amide and bisfatty acid amides, metal salts of fatty acids, such as magnesium stearate, calcium stearate, zinc stearate, aluminum stearate, barium stearate, calcium laurate, zinc octylate, and fatty acid esters, such as butyl oleate and bytyl stearate. Two or more fatty acid compounds may be combined.
  • the coextruded multilayer inflation film used in the invention is extruded so that the polyolefin resin film layer is disposed on the inside.
  • the layer extruded as the outer surface layer is preferably an L-LDPE resin film layer.
  • L-LDPE resins in view of physical strength and heat seal strength are those having the number of carbon atoms is 6 to 8, a MI (ASTM D-1238) of 0.8 to 30 g/10 minutes and a density (ASTM D-1505) of 0.870 to 0.940 g/cm 3 , produced by liquid phase process or vapor phase process.
  • the L-LDPE resin content of the L-LDPE resin film layer is more than 30 wt. %, preferably 50 to 95 wt. %.
  • One or more other resins such as LDPE resin, HDPE resin, ethylene copolymer resin or polypropylene resin, may be blended into the L-LDPE resin film layer.
  • One or more of a light-shielding material, a fatty acid compound and an antiblocking agent may be blended into the L-LDPE resin film layer in order to prevent blocking, oxidation, molding and static electrification.
  • the light-shielding material and the fatty acid compound may be similar to mentioned previously.
  • Suitable antiblocking agents are silica, diatomaceous earth, calcium silicate, aluminum silicate, talc, magnesium silicate, calcium carbonate, higher fatty acid polyvinyl esters, n-octadecyl urea, dicarboxylic acid ester amides and the like.
  • the polyolefin resin film layer and the L-LDPE resin film layer may contain various additives listed below and lubricants including paraffin wax, fatty acids, fatty acid amides, silicones, esters, higher alcohols, various thermoplastic resins, deodorants, oxygen absorbers, absorber and rubbers.
  • One or more intermediate layers may be incorporated between the polyolefin resin film layer and the L-LDPE resin film layer.
  • the coextruded multilayer inflation film may be formed by using a known inflation film molding machine, such as a commercial machine.
  • the inflation film of the invention may be used for packaging photosensitive materials such as photographic photosensitive materials, foods, medicines or chemical substances.
  • the packaging material of the invention may be used for packaging photosensitive materials such as photographic photosensitive materials, foods, medicines or chemical substances, and it is particularly suitable for packaging silver halide phtographic photosensitive materials, diazo photographic photosensitive materials, photofixing-type thermosensitive photosensitive materials, photosensitive resin photosensitive materials, ultraviolet curing-type photosensitive materials, transfer-type heat developing photosensitive materials, direct positive type photographic photosensitive materials, self-developing type photographic photosensitive materials, photosensitive materials for lithographic printing and other photographic materials which is degraded by little amount of moisture, light or gas.
  • the package form may be conventional, and includes a single-sheet flat bag, a double-sheet flat bag, a self-standing bag, a single-sheet gusset bag, a double-sheet gusset bag, inner lining for a moisture proff box, inner lining for a light room-loading light-shielding box, wrapping paper and a leader paper.
  • the bag-making form may also be conventional, and includes heat sealing, side welding (heat-cut sealing), impulse heat sealing, supersonic sealing and high frequency sealing. The methods of using an adhesive may also be utilized.
  • the coextruded multilayer inflation film of the invention is mold so that the polyolefin resin film layer is disposed as the inner surface layer, when the tubular film is wound by a winder, the polyolefin resin film layers touch each other to prevent blocking.
  • the L-LDPE resin film layer is the outer surface layer, adhesion of the additives to guide rollers and the like does not occur. Therefore, a coextruded multilayer inflation film obtained is excellent in quality.
  • the coextruded multilayer inflation film was formed by using the inflation film molding machine shown in Figure 1.
  • the resin composition composing the polyolefin resin film layer 17 was put into one of the extruders 8, and the resin composition composing the L-LDPE resin film layer 18 was put into the other extruder 8. They were melted by heating. Subsequently, the resin composition of the pololefin resin film layer 17 was extruded from the inside slit of the ring die 9, and the resin composition of the L-LDPE resin film layer 18 was extruded from the outside slit of the ring die 9. Compressed air was blown from the blast tube 10, and cooling air was blown from the air ring 11.
  • the inner surface layer was a polyolefin resin film layer 35 ⁇ m in thickness composed of 20 wt. % of HDPE resin having a MI of 1.1 g/10 minutes and a density of 0.954 g/cm 3 , 76.9 wt. % of L-LDPE resin of a copolymer of ethylene and 4-methylpentene-1 having a MI of 2.0 g/10 minutes and a density of 0.920 g/cm 3 , 3 wt. % of oil furnace carbon black and 0.1 wt. % of oleic acid amide.
  • the outer surface layer was an L-LDPE resin film layer 35 ⁇ m in thickness composed of 96.75 wt. % of L-LDPE resin of a copolymer of ethylene and 4-methylpentene-1 having a MI of 2.1 g/10 minutes and a density of 0.920 g/cm 3 , 3 wt. % of oil furnace carbon black, 0.05 wt. % of oleic acid amide and 0.2 wt. % of synthetic silica as an antiblocking agent.
  • the inner surface layer was a polyolefin resin film layer 35 ⁇ m in thickness composed of 2 wt. % of HDPE resin having a MI of 1.1 g/10 minutes and a density of 0.954 g/cm 3 , 93 wt. % of L-LDPE resin of a copolymer of ethylene and octene-1 having a MI of 2.0 g/10 minutes and a density of 0.920 g/cm 3 , 3 wt. % of oil furnace carbon black 2 wt. % of calcium stearate and 0.1 wt. % of oleic acid amide, and the rest was the same as Example II.
  • the inner surface layer was an L-LDPE resin film layer 35 ⁇ m in thickness composed of 97 wt. % of L-LDPE resin of a copolymer of ethylene and octene-1 having a MI of 2.0 g/10 minutes and a density of 0.920 g/cm 3 and 3 wt. % of oil furnace carbon black.
  • the outer furface layer was an L-LDPE resin film layer 35 ⁇ m in thickness composed of 96.75 wt. % of L-LDPE resin of a copolymer of ethylene and 4-methylpentene-1 having a MI of 2.1 g/10 minutes and a density of 0.920 g/cm 3 , 3 wt. % of oil furnace carbon black, 0.05 wt. % of oleic acid amide and 0.2 wt. % of synthetic silica.
  • the inner surface layer was a HDPE resin film layer 25 ⁇ m in thickness composed of 95 wt. % of HDPE resin having a MI of 0.4 g/10 minutes and a density of 0.964 g/cm 3 , 3 wt. % of oil furnace carbon black and 2 wt. % of calcium stearate.
  • the outer surface layer was an L-LDPE resin film layer 45 ⁇ m in thickness composed of 96.95 wt. % of L-LDPE resin of a copolymer of ethylene and 4-methylpentene-1 having a MI of 2.1 g/10 minutes and a density of 0.920 g/cm 3 , 3 wt. % of oil furnace carbon black, 0.05 wt. % of oleic acid amide and 0.2 wt. % of synthetic silica as antiblocking agent.
  • Example II Having the same layer composition as Example II, except that the inner surface layer and the outer surface layer were turned inside out.
  • a single layer inflation film 70 ⁇ m in thickness composed of 96.95 wt. % of LDPE resin having a MI of 2.4 g/10 minutes and a density of 0.923 g/cm 3 , 3 wt. % of oil furnace carbon black and 0.05 wt. % of oleic acid amide.
  • Each wound inflation film was cut in a size of 330 mm (lay-flat width) x 220 mm by a razor, and the antiblocking property was judged through opening of the cut portion.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)

Claims (5)

  1. Verpackungsmaterial für lichtempfindliche Materialien, bei dem es sich um einen coextrudierten Mehrschichten-Aufblasfilm handelt, dessen innere Oberflächenschicht eine Polyolefinharz-Filmschicht ist, die 0,5 bis 70 Gew.-% Polyethylenharz mit einer Dichte von mehr als 0,936 g/cm3 enthält.
  2. Verpackungsmaterial nach Anspruch 1, bei dem das Polyethylenharz eine Dichte von mehr als 0,941 g/cm3 und einen Schmelzindex von mehr als 0,5 g/10 min hat.
  3. Verpackungsmaterial nach Anspruch 2, bei dem die Polyolefinharz-Filmschicht ein Lichtabschirmungsmaterial und/oder eine Fettsäure-Verbindung enthält.
  4. Verpackungsmaterial nach Anspruch 1, bei dem die äußere Oberflächenschicht des coextrudierten Mehrschichten-Aufblasfilms eine L-LDPE-Harz-Filmschicht ist, die mehr als 30 Gew.-% L-LDPE-Harz enthält.
  5. Verpackungsmaterial nach Anspruch 4, bei dem die L-LDPE-Harz-Filmschicht mindestens einen Vertreter aus der Gruppe Lichtabschirmungsmaterial, Fettsäure-Verbindung und Antiblockierungsmittel enthält.
EP93113105A 1988-01-29 1989-01-30 Verpackungsmaterial für lichtempfindliche Materialien Expired - Lifetime EP0571000B1 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP63018767A JPH07110516B2 (ja) 1988-01-29 1988-01-29 感光物質包装用多層共押出インフレーションフィルムの成形方法
JP18767/88 1988-01-29
JP88142/88 1988-04-12
JP8814288A JPH01260438A (ja) 1988-04-12 1988-04-12 感光物質用包装材料
JP1988079536U JPH0643801Y2 (ja) 1988-06-17 1988-06-17 写真感光材料用包装材料
JP79536/88 1988-06-17
EP19890101568 EP0326181B1 (de) 1988-01-29 1989-01-30 Verpackungsmaterial für lichtempfindliche Waren

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP89101568.7 Division 1989-01-30
EP19890101568 Division EP0326181B1 (de) 1988-01-29 1989-01-30 Verpackungsmaterial für lichtempfindliche Waren

Publications (2)

Publication Number Publication Date
EP0571000A1 EP0571000A1 (de) 1993-11-24
EP0571000B1 true EP0571000B1 (de) 1998-12-30

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EP93113105A Expired - Lifetime EP0571000B1 (de) 1988-01-29 1989-01-30 Verpackungsmaterial für lichtempfindliche Materialien
EP19890101568 Expired - Lifetime EP0326181B1 (de) 1988-01-29 1989-01-30 Verpackungsmaterial für lichtempfindliche Waren

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DE (2) DE68928890T2 (de)

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US5540644A (en) * 1991-10-09 1996-07-30 Konica Corporation Packing bag for light sensitive materials and manufacturing method therfore
JP3085330B2 (ja) * 1992-08-17 2000-09-04 富士写真フイルム株式会社 写真感光材料用包装材料及び包装体
GB2278363B (en) * 1993-05-28 1996-10-30 Chaloke Pungtrakul A method for the prevention of blocking in linear low density polyethylene films
US6635701B2 (en) * 2001-08-09 2003-10-21 Equistar Chemicals L.P. Oriented high density polyethylene film, compositions and process suitable for preparation thereof
US20030196914A1 (en) † 2002-04-18 2003-10-23 3M Innovative Properties Company Containers for photocurable materials
US6887923B2 (en) 2002-12-11 2005-05-03 Equistar Chemicals, L.P. Processing aids for enhanced machine direction orientation rates and property enhancement of polyolefin films using hydrocarbon waxes
CN106032065A (zh) * 2015-03-17 2016-10-19 鼎基化学工业股份有限公司 薄膜贴合的制造方法及其装置
CN109177128B (zh) * 2018-08-29 2020-06-19 浙江龙诗工艺品股份有限公司 一种塑料薄膜加工成型装置
CN109435218A (zh) * 2018-11-13 2019-03-08 重庆瑞霆塑胶有限公司 Cpp膜的自动化生产加工系统
TW202140269A (zh) * 2020-04-24 2021-11-01 南亞塑膠工業股份有限公司 可見光遮蔽結構

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JPS6029743A (ja) * 1983-07-09 1985-02-15 Fuji Photo Film Co Ltd 写真感光材料包装用材料及び成形体
JPS60196335A (ja) * 1984-03-21 1985-10-04 富士写真フイルム株式会社 積層フイルム
US4701359A (en) * 1985-01-28 1987-10-20 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
JPS6218548A (ja) * 1985-07-17 1987-01-27 Fuji Photo Film Co Ltd 写真感光材料用包装材料
JPH0435890Y2 (de) * 1985-09-11 1992-08-25

Also Published As

Publication number Publication date
EP0326181A2 (de) 1989-08-02
DE68928890T2 (de) 1999-05-27
EP0571000A1 (de) 1993-11-24
EP0326181A3 (en) 1989-11-02
DE68922001D1 (de) 1995-05-11
DE68922001T2 (de) 1995-08-10
DE68928890D1 (de) 1999-02-11
EP0326181B1 (de) 1995-04-05

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