JPH02148032A - Production of photographic base - Google Patents
Production of photographic baseInfo
- Publication number
- JPH02148032A JPH02148032A JP30278088A JP30278088A JPH02148032A JP H02148032 A JPH02148032 A JP H02148032A JP 30278088 A JP30278088 A JP 30278088A JP 30278088 A JP30278088 A JP 30278088A JP H02148032 A JPH02148032 A JP H02148032A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- inert gas
- paper
- photographic
- gas
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000011261 inert gas Substances 0.000 claims abstract description 36
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 28
- 239000011347 resin Substances 0.000 abstract description 28
- 229920000098 polyolefin Polymers 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000008188 pellet Substances 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 37
- 239000010410 layer Substances 0.000 description 18
- 239000000839 emulsion Substances 0.000 description 15
- 239000000499 gel Substances 0.000 description 15
- -1 silver halide Chemical class 0.000 description 15
- 238000000034 method Methods 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000007765 extrusion coating Methods 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 235000002639 sodium chloride Nutrition 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 229920006319 cationized starch Polymers 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 239000011121 hardwood Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000003851 corona treatment Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003623 enhancer Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Chemical class C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Chemical class O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 description 1
- XCFIVNQHHFZRNR-UHFFFAOYSA-N [Ag].Cl[IH]Br Chemical compound [Ag].Cl[IH]Br XCFIVNQHHFZRNR-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 229910001864 baryta Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910000152 cobalt phosphate Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- WASQWSOJHCZDFK-UHFFFAOYSA-N diketene Chemical compound C=C1CC(=O)O1 WASQWSOJHCZDFK-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 229910052704 radon Inorganic materials 0.000 description 1
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Chemical class OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/775—Photosensitive materials characterised by the base or auxiliary layers the base being of paper
- G03C1/79—Macromolecular coatings or impregnations therefor, e.g. varnishes
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
【発明の詳細な説明】
（Ａ）産業上の利用分野
本発明は、写真印画紙用樹脂被覆紙である写真用支持体
の製造方法に関するものであり、更に詳しくは押出し機
のスクリコーへの焼けこげ状ゲル及び樹脂の酸化劣化に
よるゲルの発生（以下ゲルと称する）を防止するための
製造方法に関するものである。Detailed Description of the Invention (A) Industrial Application Field The present invention relates to a method for producing a photographic support, which is a resin-coated paper for photographic printing paper, and more specifically, it relates to a method for manufacturing a photographic support, which is a resin-coated paper for photographic paper. The present invention relates to a manufacturing method for preventing the generation of burnt gel and gel (hereinafter referred to as gel) due to oxidative deterioration of resin.
（Ｂ）従来の技術
写真印画紙はバライタ紙を支持体として、その上にハロ
ゲン化銀写真乳剤層を塗布した印画紙から、最近では紙
の両面にポリオレフィン樹脂を被覆した耐水性支持体」
二にハロゲン化銀写真乳剤層を塗布した印画紙が使われ
るようになって来た。(B) Conventional technology Photographic paper ranges from baryta paper as a support to which a silver halide photographic emulsion layer is coated, and more recently to water-resistant supports in which both sides of the paper are coated with polyolefin resin.
Second, photographic paper coated with a silver halide photographic emulsion layer began to be used.
このような耐水性支持体を製造するには、紙に溶融した
ポリオレフィン樹脂をダイスを用いて押出し被覆するこ
とが一般的であり、溶融する温度はポリオレフィン樹脂
の融点よりもかなり高い２５０℃以上の温度で行う必要
がある。この２５０°Ｃ以上の温度は加工適性面からは
適度な温度であるが、樹脂投入時には樹脂と共に空気が
押出機中に入り込み、空気中の酸素の存在により酸素と
ポリオレフィン樹脂とが反応を起こし、いわゆる焼けこ
げ状の物質を生成し、フィルムとなって押出された時に
ゲル状の欠点となって現れるこ吉がある。To produce such a water-resistant support, it is common to extrude and coat paper with molten polyolefin resin using a die, and the melting temperature is 250°C or higher, which is considerably higher than the melting point of the polyolefin resin. It is necessary to do this at a temperature. This temperature of 250°C or higher is a suitable temperature from the viewpoint of processing suitability, but when the resin is introduced, air enters the extruder together with the resin, and the presence of oxygen in the air causes a reaction between the oxygen and the polyolefin resin. It produces a so-called burnt substance, which appears as a gel-like defect when it is extruded into a film.
このようなゲルは、樹脂被覆紙表面の突起となり外観を
損ない機能的にも色々と障害となる。特に写真用支持体
の場合においてはゲルの存在そのものが写真画像として
の質を低下させるばかりでなく、ゲル部分ではその上に
塗られた写真乳剤層が乱れ易いため、正常な写真画像を
形成できず、写真印画紙としての商品価値を失ってしま
うことが多い。Such gel forms protrusions on the surface of the resin-coated paper, impairing its appearance and causing various functional problems. Particularly in the case of photographic supports, the presence of gel itself not only deteriorates the quality of the photographic image, but also the photographic emulsion layer coated on top of the gel is easily disturbed, making it impossible to form a normal photographic image. However, it often loses its commercial value as a photographic paper.
この様なゲルの発生を防止する方法として、押出しコー
ティング温度を下げて操業する方法があるか、その場合
ポリオレフィン樹脂と紙との接着性が低下するため、必
要な程度の接着性を維持するためにはコーティング速度
が制限され生産性が低下してしまう。また押出し機の構
造を滞留のおこりにくい構造にする方法や短い周期で押
出し機の分解掃除を行うことが考えられるが、写真用支
持体として必要なゲルの防止効果には不充分であったり
、生産性の低下をまねくことがあった。As a way to prevent the formation of such gels, is there a way to operate at a lower extrusion coating temperature?In that case, the adhesion between the polyolefin resin and the paper will decrease, so it is necessary to maintain the required degree of adhesion. This limits the coating speed and reduces productivity. In addition, it is possible to make the structure of the extruder less likely to cause stagnation, or to disassemble and clean the extruder at short intervals, but this may not be sufficient to prevent gel formation, which is necessary as a photographic support. This could lead to a decrease in productivity.
更には、ポリオレフィンの樹脂製造工程においてゲルの
発生を防止するために、樹脂中に酸化防止剤を添加する
ことが考えられるが、この方法はポリオレフィン樹脂と
紙との接着性を悪化させる傾向があり、またポリオレフ
ィン樹脂層中の酸化防止剤は塗設される写真乳剤に悪影
響を与え、カブリ、スポット等の写真障害となる場合が
多かった。Furthermore, in order to prevent the formation of gel in the polyolefin resin manufacturing process, it is possible to add an antioxidant to the resin, but this method tends to worsen the adhesion between the polyolefin resin and paper. Furthermore, the antioxidant in the polyolefin resin layer has an adverse effect on the coated photographic emulsion, often resulting in photographic defects such as fog and spots.
（Ｃ）発明が解決しようとする課題
本発明は、上述の課題を解決すべくなされたものであり
、ポリオレフィン樹脂を押出し塗布する方法において、
写真印画紙用樹脂被覆紙を製造するにあたり、生産性の
低下がなく、樹脂被覆層のゲル発生を防止し、且つ写真
印画紙としての性質を損なうことのない写真用支持体の
製造方法を提供することにある。(C) Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned problems, and in a method of extrusion coating a polyolefin resin,
To provide a method for producing a photographic support that does not reduce productivity, prevents gel formation in a resin coating layer, and does not impair properties as a photographic paper when manufacturing resin-coated paper for photographic paper. It's about doing.
（Ｄ）課題を解決するための手段
上述の課題を解決するために本発明者達は鋭意検詞した
結果、次のような方法を見い出し本発明に至った。即ち
、本発明はポリオレフィン樹脂を投入する押出し機のホ
ッパーの下部付近に不活性ガスを注入することにより、
ポリオレフィン樹脂の投入と共に空気が混入されること
を防ぐ方法よりなる。(D) Means for Solving the Problems In order to solve the above-mentioned problems, the inventors of the present invention conducted extensive research and found the following method, resulting in the present invention. That is, in the present invention, by injecting an inert gas near the bottom of the hopper of the extruder into which polyolefin resin is introduced,
It consists of a method to prevent air from being mixed in with the addition of polyolefin resin.
このような方法により空気中の酸素と投入されたポリオ
レフィン樹脂とが溶融状態で熱化学反応し生成するゲル
を防止することにある。The purpose of this method is to prevent the formation of a gel caused by a thermochemical reaction between oxygen in the air and the introduced polyolefin resin in a molten state.
不活性ガスを注入する箇所は投入されるポリオレフィン
樹脂が溶融されるための混練の前であれば良く、空気が
樹脂と共に混入するのを効率良く防ぐには押出し機のホ
ッパーの下部付近が適当である。即ち、第１図に示すよ
うに、押出機にベレットが流入する直前のホッパー下部
の径の細くなった部分が最適である。The inert gas can be injected at any point before the kneading process to melt the polyolefin resin being introduced, and in order to efficiently prevent air from being mixed in with the resin, it is best to inject the inert gas near the bottom of the hopper of the extruder. be. That is, as shown in FIG. 1, the optimum diameter is at the lower part of the hopper just before the pellets flow into the extruder.
不活性ガス注入部分の好ましい形態としては、第２図に
示されるように、ホッパー下部の径が最も細くなってる
管壁周囲にベレットが出てこない大きさの隙間１１を複
数あけ、この隙間から不活性ガスを管の中心部に向って
注入し、酸素混入を遮断する。具体的な隙間の大きさは
ペレットが隙間から出ることか防止できる２ｍｍ以下に
することが実用的である。より好ましくは１ｍｍ以下で
ある。As shown in Fig. 2, a preferred form of the inert gas injection part is to create multiple gaps 11 around the pipe wall where the diameter is the narrowest at the bottom of the hopper, and to allow the pellets to pass through the gaps. Inert gas is injected toward the center of the tube to block oxygen contamination. It is practical to set the specific size of the gap to 2 mm or less to prevent pellets from coming out of the gap. More preferably, it is 1 mm or less.
管壁にあける隙間の形は任意であり、円形でもよいし、
スリット状でもよい。また管壁周囲の複数の隙間から均
一に不活性ガスが注入されるよう不活性ガス滞留室１０
を設けることが好ましい。The shape of the gap in the pipe wall can be arbitrary, it can be circular,
It may be in the form of a slit. In addition, the inert gas retention chamber 10 is designed to uniformly inject inert gas from multiple gaps around the pipe wall.
It is preferable to provide
使用すべき不活性ガスは窒素、ヘリウム、ネオン、ラド
ン等の酸素との反応が不活性であれば、どのような気体
でも良いが、コストを考えれば窒素が好ましい。このよ
うな不活性ガスを注入すべき流量は樹脂の押出し量、即
ち、コーティングスピード、コーティングする１１、コ
ーティングするポリオレフィン樹脂の塗布量で決まって
くるが、投入される樹脂と共に混入される空気を遮断す
る流量であれば良い。例えばコーティングスピード１０
０ ｍ／ｍｉｎ 、コーティング巾が１５００ｍｍ。The inert gas to be used may be any gas such as nitrogen, helium, neon, radon, etc. as long as it is inert in reacting with oxygen, but nitrogen is preferred from the viewpoint of cost. The flow rate at which such inert gas should be injected is determined by the amount of resin extruded, that is, the coating speed, the amount of coating 11, and the amount of polyolefin resin to be coated. It is sufficient as long as the flow rate is sufficient. For example, coating speed 10
0 m/min, coating width is 1500 mm.
コーティングする塗布量が３０ミクロンの場合では、０
．１／／ ｍｉｎから１００１ ／ｍｉｎの流量が好
ましい。より好ましくは５１／ｍｉｎから３０１／ｍｉ
ｎの範囲の流量であり、この条件を基準に、ポリオレフ
ィンの使用量、即ち、ポリオレフィンペレットの押出し
機への送り込み量の増減に比例して不活性ガスの流量を
調節すればよい。When the coating amount is 30 microns, 0
．． Flow rates of 1//min to 1001/min are preferred. More preferably from 51/min to 301/min
Based on this condition, the flow rate of the inert gas may be adjusted in proportion to an increase or decrease in the amount of polyolefin used, that is, the amount of polyolefin pellets fed into the extruder.
なお、本発明の写真性としての無害性の効果をより高め
るために不活性ガスを注入する前に不活性ガス中の異物
を取り除くためのフィルターを押出し機の混練する前の
箇所かつ／または不活性ガスを充填したボンベに設ける
ことか好ましい。本発明におけるフィルターは、不活性
ガスが封入されているボンベの内壁に付着している金属
片等の異物がポリオレフィン樹脂中に混入されるのを防
ぐためであり、写真的に影響を及ぼさない除去率やフィ
ルター性能かあれば、特に種類は問わないか、より好ま
しくは除去率が０．０１μの以上の異物を９９．９９９
９％程度除去するものが良く、材質は、ハウジング部は
、ステンレス製又はプラスチック製、フィルタ一部は、
テフロンメンブラン、フロロカーボンサポート等が望ま
しい。In addition, in order to further enhance the non-toxic photographic effect of the present invention, before injecting the inert gas, a filter for removing foreign substances in the inert gas is installed in the extruder before kneading and/or in the inert gas. Preferably, it is provided in a cylinder filled with active gas. The purpose of the filter in the present invention is to prevent foreign substances such as metal pieces attached to the inner wall of a cylinder filled with inert gas from being mixed into the polyolefin resin, and to remove them without affecting the photographic image. It doesn't matter what kind of foreign matter it is, as long as it has a removal rate or filter performance, or more preferably, it removes foreign matter with a removal rate of 0.01μ or more by 99.9999999999.
It is best to remove about 9% of the material.The housing part is made of stainless steel or plastic, and the filter part is made of stainless steel or plastic.
Teflon membrane, fluorocarbon support, etc. are preferable.
本発明に用いられるコーティング用樹脂としては、ポリ
オレフィン、ポリスチレン、ポリ塩化ビニル等溶融押出
塗工可能であれば何でもよく、特に制限はないが、ポリ
オレフィン樹脂が押出塗工性および紙基体との接着のよ
さ、価格等から特に有効である。本発明に於けるポリオ
レフィン樹脂とは、ポリエチレン、ポリプロピレン、ポ
リブテン、ポリベンテン等のオレフィンのホモポリマー
又はエチレン−プロピレン共重合体等の２種以上のオレ
フィンからなる共重合体およびその混合物であり、各種
の密度、および溶融粘度指数（ＭＩ）のものを単独に、
あるいは混合して使用できる。The coating resin used in the present invention may be any resin that can be coated by melt extrusion, such as polyolefin, polystyrene, or polyvinyl chloride, and is not particularly limited. It is particularly effective in terms of quality, price, etc. The polyolefin resin in the present invention refers to homopolymers of olefins such as polyethylene, polypropylene, polybutene, and polybentene, or copolymers of two or more olefins such as ethylene-propylene copolymers, and mixtures thereof. Density and melt viscosity index (MI) alone,
Alternatively, they can be used in combination.
溶融押出塗工される樹脂中には酸化チタン、酸化亜鉛、
タルク、炭酸カルシウム等の白色顔料、ステアリン酸亜
鉛、ステアリン酸カルシウム等の脂肪族金属塩、群青、
コバルトバイオレット等の顔料および染料、酸化防止剤
、蛍光増白剤、紫外線吸収剤等の各種添加剤を組み合わ
せて加えるのが好ましい。Titanium oxide, zinc oxide,
White pigments such as talc and calcium carbonate, aliphatic metal salts such as zinc stearate and calcium stearate, ultramarine blue,
It is preferable to add a combination of pigments such as cobalt violet and various additives such as dyes, antioxidants, optical brighteners, and ultraviolet absorbers.
樹脂被覆紙の乳剤面側の樹脂層に加えられる酸化チタン
の使用量としては、５乃至３０重量％の範囲が好ましい
が、この添加量が５重量％未満であれば写真用支持体と
して隠蔽力が不十分であり、３０重量％を超えると、加
工性等が低下して好ましくない。特に好ましくは７重量
％から２０重量％の範囲である。The amount of titanium oxide added to the resin layer on the emulsion side of the resin-coated paper is preferably in the range of 5 to 30% by weight, but if the amount added is less than 5% by weight, it has poor hiding power as a photographic support. is insufficient, and if it exceeds 30% by weight, processability etc. deteriorate, which is not preferable. Particularly preferred is a range of 7% to 20% by weight.
また、紙基体の坪量に関しては、特に制限はないが、表
面の平滑性のよい紙が好ましく、その坪量は５０ｇ／ｒ
ｆから２５０ｇ／ｒｄの範囲で使用される。There is no particular restriction on the basis weight of the paper base, but paper with good surface smoothness is preferred, and its basis weight is 50g/r.
It is used in the range from f to 250g/rd.
また本発明を適用すべきポリオレフィン樹脂層は写真乳
剤層を形成すべき面でも良いし、写真乳剤層の反対側の
面でも良い。Further, the polyolefin resin layer to which the present invention is applied may be on the side on which the photographic emulsion layer is to be formed, or may be on the side opposite to the photographic emulsion layer.
本発明の実施に用いられる原紙は通常の天然バルブを成
分とするものあるいは合成バルブや合成繊維等でもよい
。The base paper used in the practice of the present invention may be one containing ordinary natural bulbs, synthetic bulbs, synthetic fibers, or the like.
これらの中では針葉樹材バルブ、広葉樹材バルブ、針葉
樹広葉樹材混合バルブの木材バルブを主成分とする天然
バルブ紙か有効である。これらの原紙中には各種の高分
子化合物、添加剤を含有せしめることができる。例えば
乾燥紙力増強剤としてカチオン化澱粉、カチオン化ポリ
アクリルアミド、アニオン化ポリアクリルアミド、カル
ボキシ変性ポリビニルアルコール、ゼラチンなど、サイ
ズ剤として脂肪酸塩、ロジン誘導体、ジアルキルケテン
ダイマー乳化物、石油樹脂エマルジョンなど、顔料とし
てクレー、カオリン、炭酸カルシウム、硫酸バリウム、
酸化チタンなど、湿潤紙力増強剤としてメラミン樹脂、
尿素樹脂、エボギシ化ポリアミド樹脂など、定着剤とし
て硫酸アルミニウム、塩化アルミニウムなどの多価金属
塩、カチオン化澱粉などのカチオン変性ポリマーなど、
ｐＨ調節剤としてカセイソーダ、炭酸ソーダ、塩酸など
、無機電解質として食塩、ボウ硝など、そのほか染料、
蛍光増白剤、ラテックスなどを適宜組み合わせて含有せ
しめることができる。Among these, natural valve paper mainly composed of wood valves such as softwood valves, hardwood valves, and mixed softwood and hardwood valves are effective. These base papers can contain various polymer compounds and additives. For example, dry paper strength enhancers include cationized starch, cationized polyacrylamide, anionized polyacrylamide, carboxy-modified polyvinyl alcohol, gelatin, etc. Sizing agents include fatty acid salts, rosin derivatives, dialkyl ketene dimer emulsions, petroleum resin emulsions, etc., and pigments. as clay, kaolin, calcium carbonate, barium sulfate,
Melamine resin as a wet paper strength enhancer such as titanium oxide,
Urea resins, evoclated polyamide resins, polyvalent metal salts such as aluminum sulfate and aluminum chloride as fixing agents, cationically modified polymers such as cationized starch, etc.
pH regulators include caustic soda, soda carbonate, and hydrochloric acid; inorganic electrolytes include table salt and sulfur salt; dyes,
Optical brighteners, latex, and the like can be contained in appropriate combinations.
本発明に於ける写真用支持体は、通常走行する紙または
合成紙基体（以下「基紙」という）上に加熱溶融したポ
リオレフィンをスリットダイからフィルム状に溶融押出
し、冷却ロールとプレスロール間で冷却接着して製造さ
れる。通常溶融押出し温度は２５０℃ないし３５０℃で
あることが好ましく、又、ポリオレフィンを基紙、基体
上にコーティングする前にコロナ放電処理、火炎処理な
どの活性化処理を施すのが好ましい。ポリオレフイン被
覆層の厚さとし、て特に制限はないが、５ミクロンない
し５５０ミクロン程度の厚さに押出コーティングしたも
のか一般的である。The photographic support in the present invention is produced by extruding heat-molten polyolefin into a film from a slit die onto a paper or synthetic paper base (hereinafter referred to as "base paper") that normally runs, and then extruding it into a film between a cooling roll and a press roll. Manufactured by cold bonding. Usually, the melt extrusion temperature is preferably 250° C. to 350° C., and it is preferable to perform an activation treatment such as corona discharge treatment or flame treatment before coating the polyolefin on the base paper or substrate. The thickness of the polyolefin coating layer is not particularly limited, but it is generally extrusion coated to a thickness of about 5 microns to 550 microns.
本発明に利用される写真用支持体には名種のハロゲン化
銀写真乳剤層を設けることができる。例えば塩化銀、臭
化銀、塩臭化銀、沃臭化銀、塩沃臭化銀乳剤層を設ける
ことができる。またハロゲン化銀写真乳剤層にカラーカ
プラーを含有せＩ７めて、多層ハロゲン化銀写真構成層
を設けることかできる。これらのハロゲン化銀乳剤層の
結合剤としては、通常のゼラチンの他にポリビニルピロ
リドン、ポリビニルアルコール、多糖類の硫酸エステル
化合物などの親水性高分子物質を用いることができる。The photographic support utilized in the present invention can be provided with a variety of silver halide photographic emulsion layers. For example, silver chloride, silver bromide, silver chlorobromide, silver iodobromide, and silver chloroiodobromide emulsion layers can be provided. Further, a color coupler can be contained in the silver halide photographic emulsion layer to provide a multilayer silver halide photographic constituent layer. As the binder for these silver halide emulsion layers, in addition to ordinary gelatin, hydrophilic polymeric substances such as polyvinylpyrrolidone, polyvinyl alcohol, and polysaccharide sulfate ester compounds can be used.
また上記のハロゲン化銀乳剤層には増感色素、化学増感
剤、カブリ防止剤、硬膜剤、塗布助剤、汚染防止剤、現
像促進剤、紫外線吸収剤、蛍光増白剤、鮮鋭度向」―剤
、帯電防止剤、ｐＨ調節剤などの各種添加剤を含有せし
めることができる。In addition, the above silver halide emulsion layer contains sensitizing dyes, chemical sensitizers, antifoggants, hardeners, coating aids, anti-staining agents, development accelerators, ultraviolet absorbers, optical brighteners, sharpness Various additives such as antistatic agents, antistatic agents, and pH adjusters can be contained.
また本発明の写真用支持体の裏面に目的に応じた裏塗層
を設番」ても良く、また表面にも目的に応じた下引層を
設けても良い。Further, a backing layer depending on the purpose may be provided on the back side of the photographic support of the present invention, and a subbing layer depending on the purpose may be provided on the surface as well.
以下に本発明を実施例にて詳細に説明する。The present invention will be explained in detail below with reference to Examples.
（Ｅ ）実施例１
広葉樹材晒クラフトバルブ（ＬＢＫＩ））と釦葉樹祠晒
すルファイドバルブ（Ｎ Ｂ Ｓ Ｐ）の１１混合物を
カナデイアンスタンダードフリーネスで３００ ｍｌに
なるまで叩解し、パルプスラリーを作成した。これにサ
イズ剤としてアルキルケテンダイマー（ＤＨＣ社製 ア
コ−ペル １−２）を対バルブに０． ５重量％、強度
剤としてポリアクリルアミド（星光化学社製 スターガ
ムＡ、−１５）を対バルブに１．０重量％、カチオン化
澱粉（玉子ナショナル社製 ケイｌ−−−Ｆ ）を対バ
ルブに２゜０重量％、ポリアミドエピクロロヒドリン（
ＤＨＣ社製 エビノックスＰｉ、３０１）を対バルブに
０．５重量％添加し、水で希釈後１％スラリーとした。(E) Example 1 A mixture of 11 mixtures of bleached hardwood kraft valve (LBKI) and bleached rulphide valve (NBSP) was beaten with Canadian Standard Freeness to a volume of 300 ml, and a pulp slurry was prepared. Created. To this, alkyl ketene dimer (Acopel 1-2 manufactured by DHC) was added as a sizing agent to the valve pair. 5% by weight, 1.0% by weight of polyacrylamide (Star Gum A, -15, manufactured by Seiko Kagaku Co., Ltd.) as a strength agent for the bulb, and 2.0% by weight of cationized starch (Keil---F, manufactured by Tamago National Co., Ltd.) for the bulb.゜0% by weight, polyamide epichlorohydrin (
0.5% by weight of Evinox Pi (301) manufactured by DHC Corporation was added to the pair of bulbs, and after diluting with water, a 1% slurry was prepared.
これらのスラリーを長網抄紙機で坪ｆｆｉ １７０ ｇ
／イになるように抄造した。These slurries were processed using a Fourdrinier paper machine to produce 170 g of slurry.
/ I made the paper so that it looks like this.
こうｌ、て抄造（、た基紙に密度０．９１８ｇ／ｃｍ３
の低密度ポリエチレン４０重量部と密度０゜９６２ ｇ
／ｃｍ３の高密度ポリエチレン２０重量部と低密度ポ
リエチレンに３０重量％の二酸化チタンを練り込んだマ
スターバッチ４０重量部からなる樹脂組成物に窒素ガス
を２０β／ ｍ ｉ ｎの流量で第１図に示すように押
出機のホ・ソバ−２の下部に注入しながら、３２０℃で
溶融し、塗布１↑１を１５００ｍｍとし厚さ３０ミクロ
ンになるように１００ｍ／ｍｉｎのスピードで押出（７
コーテイングした。なお第１図に示すように不活性ガス
を押出し機に注入する前と不活性ガスボンベ４との間に
フィルター３を設けた。またもう一方の面には密度０．
９６２ｇ／ｃｍ３の高密度ポリエチレン樹脂５０重量部
と密度０． ９１８ ｇ／ａｎ３の低密度ポリエチレン
樹脂５０重置部よりなる樹脂組成物を同様な方法で窒素
ガスを注入しながら３２０°Ｃに溶融し塗布［１１を１
５００ｍｍとし厚さ３０ミクロンになるように１００
ｍ／ｍｉｎのスピードで押出ｊ７コーテイングして写真
印画紙用支持体を得た。This paper was made using paper with a density of 0.918g/cm3.
40 parts by weight of low density polyethylene with a density of 0°962 g
Nitrogen gas was added to a resin composition consisting of 20 parts by weight of high-density polyethylene of 20 parts by weight of /cm3 and 40 parts by weight of a masterbatch made by kneading 30 parts by weight of titanium dioxide into low-density polyethylene at a flow rate of 20β/min as shown in Figure 1. As shown, melt the mixture at 320°C while injecting it into the lower part of Ho Soba-2 of the extruder, and extrude at a speed of 100 m/min (7
Coated. As shown in FIG. 1, a filter 3 was provided between the inert gas cylinder 4 and before injecting the inert gas into the extruder. The other side has a density of 0.
50 parts by weight of high density polyethylene resin of 962 g/cm3 and density 0. A resin composition consisting of 50 overlapping parts of low density polyethylene resin of 918 g/an3 was melted and applied at 320°C while injecting nitrogen gas in the same manner [11 to 1
500mm and 100mm thick so that it is 30 microns thick.
A support for photographic paper was obtained by extrusion J7 coating at a speed of m/min.
この支持体の二酸化チタンを含有する層の面にコロナ処
理を施した後、カラー印画紙用乳剤を塗布し、乾燥しカ
ラー印画紙を作成した。このカラー印画紙を露光後現像
処理して写真性を観察１７た。After corona treatment was applied to the surface of the titanium dioxide-containing layer of this support, an emulsion for color photographic paper was applied and dried to prepare color photographic paper. After exposure, this color photographic paper was developed and its photographic properties were observed.
評価については、ゲルの個数は、樹脂温度３５０℃、１
時間当り５０ｋｇとなる条件下で１９２時間フィルム状
に押出した後の３Ｍのフィルム中における０、２ｍｍ以
上のゲルの個数を数えた。また接着性はポリオレフィン
樹脂を被覆した後に剥離して紙の表面の毛羽立ち状態を
観察した。写真性はカブリ性とポチの発生を観察した。For evaluation, the number of gels was 1 at a resin temperature of 350°C.
After extruding into a film for 192 hours under conditions of 50 kg per hour, the number of gels of 0.2 mm or more in the 3M film was counted. Adhesion was determined by coating the paper with polyolefin resin, peeling it off, and observing the fuzziness of the surface of the paper. Regarding photographic performance, fogging and occurrence of spots were observed.
これらの結果を表１に示す。These results are shown in Table 1.
実施例２
実施例１における押出コーティングにおいて窒素ガス注
入量を１７！／ｍｉｎに変えて行った。その結果を表１
に示す。Example 2 In the extrusion coating in Example 1, the amount of nitrogen gas injected was 17! /min. Table 1 shows the results.
Shown below.
実施例３
実施例１における押出コーティングの際の窒素ガスをヘ
リウムガスに替えて行った。結果を表１に示す。この場
合ヘリウムガスは窒素ガスに対し］ ４
約４ （−ｒ＜コストか高くなっカニ。Example 3 The extrusion coating in Example 1 was performed by replacing the nitrogen gas with helium gas. The results are shown in Table 1. In this case, helium gas is different from nitrogen gas] 4 Approximately 4 (-r<Cost is high.)
実施例４
実施例１における押出コーティングの際の不活性ガスの
封入時、フィルターを使用しないで行った。その結果を
表１に示す。Example 4 Injecting inert gas during extrusion coating in Example 1 was carried out without using a filter. The results are shown in Table 1.
この場合、ボンベのバイブあるいは導入管内に付着１７
ていたと思われる異物が樹脂層に混入し、ボチがわずか
発生した。In this case, 17.
Foreign matter that was thought to have been mixed into the resin layer caused a few spots to appear.
比較例１
実施例における押出コーティングの際の不活性ガスの封
入を行なわない従来の方法での結果を表１−に示す。こ
の場合、ゲルの個数は不活性ガスの使用時に比べ、増加
した。Comparative Example 1 Table 1 shows the results obtained using a conventional method in which no inert gas was enclosed during extrusion coating in Example. In this case, the number of gels increased compared to when inert gas was used.
（以下余白）
（Ｆ）効果
実施例でも明らかなよ・うに、樹脂の投入時に不活性ガ
スを注入しながら樹脂を溶融する方法は生産性の低下も
なく樹脂被覆層のゲルの発生を防止し１、何ら写真性に
悪影響を与えない写真用支持体の製造方法となる。不活
性ガスをポリオレフィンに注入する前にフィルタ・−を
設けることにより、ガスの流れが持ち込む異物を除去す
ることができ、不活性ガス注入による不都合な点は解消
する。(Left below) (F) As is clear from the effect examples, the method of melting the resin while injecting inert gas when adding the resin prevents the formation of gel in the resin coating layer without reducing productivity. 1. A method for producing a photographic support that does not have any adverse effect on photographic properties. By providing a filter before injecting the inert gas into the polyolefin, foreign matter introduced by the gas flow can be removed and the disadvantages of inert gas injection are eliminated.
第１図はポリオレフィン樹脂が押出し機のホッパーに投
入され、スクリュ一部分で加熱され溶融される前におい
て、ホッパーの下部より不活性ガスが注入され、空気が
遮断される簡略図を示す。
第２図は、不活性ガスがホッパー下部に注入される時に
、不活性ガスが滞留室に一時滞留され、複数の隙間から
ホッパー下部へを注入される装置を示す平面及び側面の
断面簡略図である。
１・・・・・・ポリオレフィン樹脂ベレット、２・・・
・・押出し２機のポツパー、３・・・・・・フィルター
４・・・・・・不活性ガスボンベ、
５・・・・・・フローメーター、６・・・・・・押出機
、７・・・・・・スクリュー、８・・・・・・ダイス、
９・・・・・・溶融樹脂、１０・・・・・・不活性ガス
滞留室、１１・・・・・・不活性ガス注入隙間
平面図
イ貝ｌ］ 遁ム
色
第２図FIG. 1 shows a simplified diagram in which polyolefin resin is introduced into the hopper of an extruder, and before it is heated and melted by a portion of the screw, inert gas is injected from the bottom of the hopper and air is shut off. Figure 2 is a simplified plan and side cross-sectional view showing a device in which, when inert gas is injected into the lower part of the hopper, the inert gas is temporarily retained in the retention chamber and is injected into the lower part of the hopper from multiple gaps. be. 1...Polyolefin resin pellet, 2...
...Poppers for two extruders, 3...Filter 4...Inert gas cylinder, 5...Flow meter, 6...Extruder, 7... ...Screw, 8...Dice,
9... Molten resin, 10... Inert gas retention chamber, 11... Plan view of inert gas injection gap, Figure 2.
Claims (3)
ーの下部付近に不活性ガスを注入しながらポリオレフィ
ン樹脂を押出しコーティングすることを特徴とする写真
用支持体の製造方法。(1) A method for producing a photographic support, which comprises extruding and coating a polyolefin resin while injecting an inert gas near the bottom of a hopper into which the polyolefin resin is introduced into an extruder.
にフィルターを設けたことを特徴とする請求項１記載の
写真用支持体の製造方法。(2) The method for producing a photographic support according to claim 1, characterized in that a filter is provided before injecting the inert gas into the polyolefin resin.
１記載の写真用支持体の製造方法。(3) The method for producing a photographic support according to claim 1, wherein the inert gas is nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30278088A JPH02148032A (en) | 1988-11-29 | 1988-11-29 | Production of photographic base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30278088A JPH02148032A (en) | 1988-11-29 | 1988-11-29 | Production of photographic base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02148032A true JPH02148032A (en) | 1990-06-06 |
Family
ID=17913029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30278088A Pending JPH02148032A (en) | 1988-11-29 | 1988-11-29 | Production of photographic base |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02148032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0573753A1 (en) * | 1992-06-12 | 1993-12-15 | Felix Schoeller jr. Papierfabrik GmbH & Co. KG | Method of production of a coating material for photographic support |
-
1988
- 1988-11-29 JP JP30278088A patent/JPH02148032A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0573753A1 (en) * | 1992-06-12 | 1993-12-15 | Felix Schoeller jr. Papierfabrik GmbH & Co. KG | Method of production of a coating material for photographic support |
| US5455073A (en) * | 1992-06-12 | 1995-10-03 | Felix Schoeller Jr Papierfabriken Gmbh & Co.Kg | Method for the production of a coating material for photographic supports |
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