JP4348838B2 - Foam cushion sheet - Google Patents

Description

【００５３】
（実施例１、比較例１）
エンボスフィルム及びベースフィルムは、表１に示す各成分を予めドライブレンドで均一に混合したポリエチレン組成物をフィルム成形したものを用いた。
図３に示したフィルム方式により、緩衝シートを製造した。製造条件は、加熱ロールがエンボスフィルム側１３０〜２００℃の範囲及びベースフィルム側１１０〜１５０℃の範囲、エンボスロールが７０〜１１０℃の範囲、冷却ロールが６０〜９０℃の範囲、巻き取り速度２〜４ｍ／分であった。
得られた緩衝シートを塩化水素除去測定法により評価し、結果を表１に示した。
【００５４】
（実施例２〜３）
エンボスフィルム及びベースフィルムは、表２に示す各成分を予めドライブレンドで均一に混合したポリエチレン組成物をフィルム成形したものを用いた。
図３に示したフィルム方式により、緩衝シートを製造した。製造条件は、加熱ロールがエンボスフィルム側１３０〜２００℃の範囲及びベースフィルム側１１０〜１５０℃の範囲、エンボスロールが７０〜１１０℃の範囲、冷却ロールが６０〜９０℃の範囲、巻き取り速度２〜４ｍ／分であった。
得られた緩衝シートを塩化水素除去測定法により評価し、結果を表２に示した。
【００５５】
【表１】

【００５６】
【表２】

【００５７】
【発明の効果】
本発明の気泡性緩衝シートは、気泡性緩衝シート燃焼時に、他の塩素を含む燃焼物より発生する塩化水素を除去可能な気泡性緩衝シートを提供することができる。
本発明の気泡性緩衝シートは、非ハロゲン系の難燃剤、非ハロゲン系の着色成分を用いた完全な非ハロゲン系のプラスチック製の気泡性緩衝シートを提供することができる。
【図面の簡単な説明】
【図１】 本発明の緩衝シートの構造の一実施態様の説明図である。
【図２】 本発明の緩衝シートの構造の一実施態様の説明図である。
【図３】 インフレーションフィルム原反等を用いて本発明の緩衝シートを製造する工程の一実施態様の説明図である。
【図４】 インフレーションフィルム原反の成形方法の一実施態様の説明図である。
【図５】 Ｔダイフィルム成形ラインからフィルムを直接製造して、緩衝シートを製造する工程の一実施態様の説明図である。
【図６】 緩衝シート６とトップフィルム２３とを貼り合わせる工程の一実施態様の説明図である。
【符号の説明】
１，７ 気泡性緩衝シート、
２、２ａ、２ｂ、 フィルム、
３ エンボスフィルムの凸状の独立気泡部（エンボス）、
２１ エンボス、
２２ エンボスフィルム、
２３ トップフィルム、
２４ ベースフィルム、
１０１ａ、１０１ｂ、１０２、１０３ａ、１０３ｂ、１０６、１０８、１１５、１１９ ロール、
１０７，１１６、１１８、１２０ 加熱ロール、
１１０、１１４、１２１ 圧着ロール、
１０９ エンボスロール、
１１１、１１２ 冷却ロール、
２０１ ダイス、
２０２、２０３ Ｔダイ、
４０１ 調整板、
４０２ スリットカッター[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-halogen plastic foam cushioning sheet having convex closed cells capable of removing hydrogen chloride when the foam cushion sheet burns.
[0002]
[Prior art]
Japanese Patent Publication No. 1-503232 discloses a reactive calcium hydroxide base purification agent for purifying gas and waste gas, before and / or during digestion, together with water necessary for digestion and reaction of calcium hydroxide. Substances that increase the reactivity, substances that bind to pollutants and catalytic substances and / or substances that increase the reactivity of calcium hydroxide after digestion, substances that bind pollutants and catalytic substances A reaction produced by adding in a finely dispersed state a surface active material comprising at least one of activated carbon and charcoal-flat furnace coke in any of the above steps. A basic calcium hydroxide-based purifier is disclosed.
[0003]
In JP-A-7-257594, spindle-shaped hydrous ferric oxide particles or surface water content is 0.02 wt% / m. ² There is disclosed a plastic garbage bag made of a thermoplastic resin film containing 0.1 to 20.0 wt% of granular magnetite particles having a particle size of not less than / g or a mixture of both particles.
[0004]
Japanese Patent Application Laid-Open No. 11-287411 discloses a dust incinerator characterized by injecting a powder mainly composed of silica and aluminum silicate, which has a high adsorption and absorption capacity of a dioxin precursor, into the combustion process of a dust incinerator. Discloses a method for suppressing the generation of dioxins.
[0005]
Japanese Patent Application Laid-Open No. 11-140331 discloses a synthetic resin composition obtained by adding 0.5 to 40% by weight of artificial zeolite to a synthetic resin component.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a non-halogen plastic foam cushioning sheet having convex closed cells capable of removing hydrogen chloride during the foaming cushion sheet combustion.
It is another object of the present invention to provide a complete non-halogen plastic foamed cushion sheet using a non-halogen flame retardant and a non-halogen coloring component.
[0007]
[Means for Solving the Problems]
In the present invention, a large number of convex protrusions are formed. The thickness of the convex portion is 10 to 80 μm, and the thickness other than the convex portion is 15 to 200 μm. With embossed film , Planar With a thickness of 15-150 μm With base film , A foam cushioning sheet having convex closed cells and / or a large number of convex protrusions are formed. The thickness of the convex portion is 10 to 80 μm, and the thickness other than the convex portion is 15 to 200 μm. With embossed film , Planar With a thickness of 15-150 μm Bonded with base film, embossed film with convex closed cells, and flat on top of convex protrusion 10 to 100 μm thick In the cellular cushion sheet with the top film attached,
One or more films selected from an embossed film, a base film, and a top film are (A1) 100 parts by weight of a resin component not containing a halogen, and (B1) a BET specific surface area of 8 m. ² / G or more, preferably 10 m ² / G or more, more preferably 25 m ² / G or more, particularly preferably 30 m ² / G or more slaked lime 5-20 0.1 to 20 parts by weight of one or more fillers selected from (B2) activated carbon, silica and zeolite, preferably 0.3 to 10 parts by weight, particularly preferably 0.4 to 5 parts by weight. It is a foaming buffer sheet characterized by being a film containing.
[0008]
The cellular cushion sheet is preferably a cellular cushion sheet characterized by being colored using a coloring component such as a dye or pigment not containing halogen.
[0009]
One or more films selected from an embossed film, a base film and a top film of a cellular cushion sheet,
(A1) For 100 parts by weight of the resin component not containing halogen,
Further, (C1) 5 to 50 parts by weight of a flame retardant containing no halogen, further 8 to 40 parts by weight, particularly 8 to 30 parts by weight
A cellular cushioning sheet characterized by being a film containing
[0010]
One or more films selected from an embossed film, a base film and a top film of a cellular cushion sheet,
(A1) For 100 parts by weight of the resin component not containing halogen,
Further, (C1) 5 to 50 parts by weight of a flame retardant containing no halogen, further 8 to 40 parts by weight, particularly 8 to 30 parts by weight
A film containing
The cellular cushion sheet is preferably characterized in that the cellular cushion sheet is colored using a coloring component such as a dye or pigment not containing halogen.
[0011]
In the cellular cushion sheet, one or more films selected from an embossed film, a base film and a top film are
(A1) containing a halogen-free resin component, (B1) slaked lime, (B2) one or more fillers selected from activated carbon, silica, zeolite, and (C1) a flame retardant containing no halogen, (A1) containing a halogen For 100 parts by weight of the resin component not contained, the total of flame retardants containing no slaked lime, filler and halogen,
A film containing 80 parts by weight or less, further 70 parts by weight or less, further 60 parts by weight or less, particularly 50 parts by weight or less is preferable because of excellent moldability.
[0012]
The halogen-free resin component is low density polyethylene, high density polyethylene, ethylene or (co) polymer of ethylene and an α-olefin having 3 to 10 carbon atoms, ethylene copolymer, propylene or propylene and ethylene. (Co) polymer with α-olefin having 2 to 10 carbon atoms, polyolefin such as poly-4-methylpentene-1, polyamide, polysulfone, polyimide, polyester and other halogen-free polymers such as bromine, for example, A polymer containing no halogen such as chlorine or bromine in the main chain or side chain can be used.
[0013]
Examples of ethylene copolymers include ethylene / vinyl acetate copolymers, ethylene / acrylic acid ester copolymers, ethylene / methacrylic acid ester copolymers, ethylene / acrylic acid copolymers, ethylene / methacrylic acid copolymers, Examples thereof include ethylene copolymers such as ethylene / propylene rubber. Among these ethylene-based copolymers, ethylene / acrylic acid ester copolymers such as ethylene / vinyl acetate copolymers, ethylene / ethyl acrylate copolymers, or mixtures thereof have excellent heat resistance, and metal hydrates. An ethylene / ethyl acrylate copolymer is most preferable because of its excellent acceptability.
[0014]
Slaked lime and filler
(1) Reactivity produced by digestion by adding in a finely dispersed state a surface active substance consisting of one or more of calcium hydroxide and silica, activated carbon, zeolite, and charcoal-flat furnace coke together with water necessary for digestion. Calcium hydroxide-based purification agent,
(2) Before and / or during digestion as described in JP-T-1-503232, one or more substances that increase the reactivity of calcium hydroxide and catalytic substances are added and / or after digestion, Adding one or more of a substance that enhances the reactivity of calcium hydroxide and a catalytic agent, and finely dispersing a surface active substance comprising at least one of silica, activated carbon, charcoal-flat furnace coke, and zeolite in any of the above steps It is possible to use a reactive calcium hydroxide-based purifier characterized by being added in the state.
[0015]
One or more films selected from an embossed film, a base film, and a top film may further contain a halogen-free substance or a halogen-free catalytic substance in order to further increase the reactivity of slaked lime or calcium hydroxide. preferable.
[0016]
As the substance that enhances the reactivity of calcium hydroxide, a substance containing no halogen is preferable, and an alkali hydrogen carbonate, an alkali hydroxide and / or an alkali carbonate is added. For this purpose, sodium hydroxide, sodium hydrogen carbonate and / or sodium carbonate are particularly suitable.
[0017]
As the catalytic substance, a substance containing no halogen is preferable, and one or more catalytic substances selected from compounds of vanadium, tungsten, chromium, molybdenum, manganese, iron, nickel, cobalt, and titanium can be used.
Catalytic substance is (B1) BET specific surface area 8m ² It is preferable to add a range of 0.01% to 30% with respect to the weight of slaked lime of at least / g.
[0018]
As the flame retardant containing no halogen, metal hydrates, ammonium sulfate flame retardants and the like can be used.
Examples of the metal hydrate include inorganic compounds having a hydroxyl group or crystal water such as aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, hydrated aluminum silicate, orthosilicate aluminum, hydrated magnesium silicate, hydrotalcite and the like. . These metal hydrates may be used alone or in combination of two or more, but the most preferred is magnesium hydroxide. These metal hydrates preferably have a crystal particle diameter in the range of 0.3 to 1.0 μm and have almost no aggregation. As such a thing, there exists magnesium hydroxide type flame retardant Kisuma 5 (trademark) by Kyowa Chemical Industry Co., Ltd., for example. Of these, grades subjected to surface treatment such as Kisuma 5A, 5B, 5E, and 5J are preferable.
[0019]
As the ammonium sulfate flame retardant, the flame retardant described in JP-A-5-98260 is 0.1% by weight, preferably 0.3% by weight, particularly preferably 0.5%, based on ammonium sulfate and the weight of the ammonium sulfate. A flame retardant comprising a fine powder containing from 10% by weight to 10% by weight, preferably 5% by weight, particularly preferably 3% by weight, of a fatty acid aluminum salt alone or a mixture of two or more thereof can be used.
As the ammonium sulfate flame retardant, the maximum particle size is preferably 75 μm or less.
[0020]
The fatty acid aluminum salt is preferably a saturated or unsaturated fatty acid salt having 6 to 22 carbon atoms in the fatty acid group.
The fatty acid salt is preferably a monofatty acid aluminum salt, a difatty acid aluminum salt or a trifatty acid aluminum salt.
[0021]
Specific examples of fatty acid aluminum salts include aluminum monocaproate, aluminum dicaproate, aluminum tricaproate, aluminum monocaprylate, aluminum dicaprylate, aluminum tricaprylate, aluminum monocaprate, aluminum dicaprate, and aluminum trica Plate, aluminum monolaurate, aluminum dilaurate, aluminum trilaurate, aluminum monomyristate, aluminum dimyristate, aluminum trimiristate, aluminum monopalmitate, aluminum dipalmitate, aluminum tripalmitate, aluminum monostearate, Aluminum distearate, aluminum tristearate, aluminum monoole , Mention may be made of aluminum dioleate, aluminum trioleate, aluminum monoalkylene Romantic, aluminum dialkyl Romantic, aluminum trialkylene Romantic, aluminum monobehenate, aluminum dibehenate and aluminum tribehenate like.
[0022]
The cellular buffer sheet of the present invention is preferably colored using a coloring component not containing halogen.
Monoazo yellow, disazo yellow and the like can be used as the coloring component not containing halogen, and coloring masterbatch TET 2KA567 YEL-FD manufactured by Toyo Ink Manufacturing Co., Ltd. containing these can be used.
[0023]
The average particle diameter of the filler is preferably 7 μm or less, more preferably 6 μm or less, further 5 μm or less, and particularly preferably 3 μm or less.
The activated carbon is powdery, and the particle size is preferably 10 μm or less, more preferably 7 μm or less, further 5 μm or less, and particularly preferably 3 μm or less.
As silica, silica gel or white carbon can be used, and the average particle diameter is preferably 7 μm or less, more preferably 6 μm or less, further 5 μm or less, and particularly preferably 3 μm or less.
As zeolite, zeolite such as hydrous alkali metal salt or alkaline earth metal salt of crystalline alumina or silicate, such as natural zeolite or synthetic zeolite can be used, and it is in powder form, particle size is 10 μm or less, further 7 μm or less, Further, it is preferably 5 μm or less, particularly 3 μm or less.
[0024]
The resin composition can be obtained by mixing and kneading each component using various kneaders such as a Banbury mixer, a roll mixer, a kneader, a high-speed rotary mixer, and an extruder, preferably a single screw or twin screw extruder. . It can also be kneaded during film inflation or T-die molding. It can also be mixed by solution blending using a suitable good solvent.
[0025]
The above-mentioned resin composition, except for the constituents of the present invention, is a non-halogen higher fatty acid, a higher aliphatic amide, a metal soap, a lubricant such as a glycerin ester, an antiblocking agent such as a phenol, Phosphorous, antioxidants such as BHT, ultraviolet absorbers such as benzophenone, benzotriazole, and HALS, inorganic and organic fillers such as talc, diatomaceous earth, and mica, antistatic agents, and surfactants can be added.
[0026]
The cellular cushion sheet of the present invention is a cellular cushion sheet having a large number of convex closed cells in which an embossed film having a large number of embosses and a planar base film are laminated. The embossed film on which the convex protrusions are formed is bonded to a flat base film, and bubbles are formed inside the convex protrusions of the embossed film, or the top surface of the convex protrusions of the foam cushion sheet is flat. A three-layer structure in which the top film is bonded may be used. The embossed film is a film in which air bubbles do not escape after forming a large number of bubbles by bonding them together by a method such as heat fusion with a base film.
[0027]
The cellular cushion sheet of the present invention is a paper containing no halogen containing stretched paper such as kraft paper, cardboard, fine paper, liner or crepe paper on one or both sides of the base film and the top film bonded to the embossed film. Sheet made; Halogen-free metal foil such as aluminum foil; Halogen-free thermoplastic resin film such as polyimides, polyolefins, polyamides, polysulfones, polyesters; inorganic or glass fibers, aromatic polyamide fibers, etc. Non-halogen non-woven fabric made of organic fiber; non-halogen plastic sheet reinforced with glass fiber, carbon fiber, etc .; non-halogen inorganic fiber woven fabric such as glass, silicon carbide, silicon nitride; Halogen-free organic fiber woven fabric such as aromatic polyamide fiber; glass fiber, Fiber-reinforced plastic fabric that does not contain halogen-containing fibers and the like; and may be used by laminating these laminated sheets.
The cellular shock-absorbing sheet of the present invention can be used by bonding a pressure-sensitive adhesive layer containing no halogen to one or both surfaces of a base film and a top film bonded to an embossed film.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
In the following, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited only to these embodiments.
[0029]
An example of a specific structure of the cellular cushion sheet of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of a cellular cushion sheet 1 of the present invention. In the cellular cushion sheet 1, the embossed film 22 and the base film 24 are laminated and bonded together.
[0030]
The embossed film 22 has a large number of protrusions or embosses 21, and the protrusions 21 are preferably flat as shown in FIG. In FIG. 1, the protrusions 21 are regularly arranged in a lattice shape, but the arrangement of the protrusions 21 is not limited. The embossed film 22 has a surface on the side where the protrusions 21 protrude and a surface on the side where the protrusions 21 do not protrude, but the base film 24 is bonded to the surface on which the protrusions 21 do not protrude. Thereby, the protrusion 21 forms the bubble part 3 with the base film 24, and this bubble part has a buffering action.
[0031]
FIG. 2 is an explanatory view of another cellular cushion sheet 7 of the present invention. In the buffer sheet 7, the top film 23, the embossed film 22, and the base film 24 are laminated and bonded in this order. In this embodiment, the cushioning sheet 1 of FIG. 1 has a structure in which a top film 23 is further bonded to the surface of the embossed film 22 where the protrusions 21 protrude. That is, the top film 23 and the base film 24 are bonded together with the embossed film 22 interposed therebetween. In the buffer sheet 7, the bubble 3 formed by the protrusion 21 and the base film 24 not only has a buffering action, but also the space outside the protrusion 21 sandwiched between the embossed film 22 and the top film 23 has a buffering action. Have
[0032]
As for the thickness of the embossed film, the thickness of the convex closed cell portion (emboss) 3 is preferably 10 μm to 80 μm, more preferably 18 μm to 60 μm, especially 20 μm to 55 μm, and the thickness of the seal portion 2 (other than the embossed portion). The thickness is preferably 15 μm to 200 μm, more preferably 18 μm to 150 μm, and particularly preferably 20 μm to 130 μm. The film thickness of the base film is usually 15 μm to 150 μm, more preferably 18 μm to 100 μm, and particularly preferably in the range of 20 μm to 80 μm.
[0033]
The embossed film 22 and the base film 24 may be a film formed by either an inflation method or a T-die method.
[0034]
The top film 23 is not particularly limited as long as it is a film or sheet that has flame retardancy and can be heat-sealed while being crimped to the embossed film 22. The thickness can be appropriately selected depending on the material to be used, but usually 10 μm to 100 μm, more preferably 12 μm to 90 μm, particularly preferably 15 μm to 80 μm, and the top film 23 is formed by either the inflation method or the T-die method. But you can.
[0035]
In the cellular cushion sheet of the present invention, any of the embossed film 22, the top film 23, and the base film 24 may be not only a single layer film but also a multilayer film having two or more layers. However, after forming a large number of embosses, it is a film in which no air escape occurs.
[0036]
The shape of the emboss is mainly a cylinder, but a triangular prism, a prism, a polygonal prism such as a pentagonal prism and a hexagonal prism, a cone, a triangular pyramid, a pyramid, a polygonal pyramid such as a pentagonal pyramid and a hexagonal pyramid, a truncated cone, a triangular truncated pyramid It may be a base, a polygonal frustum such as a pentagonal frustum or a hexagonal frustum, a hemisphere, an egg shape, a spheroid, or the like. A plurality of these shapes may be combined.
[0037]
Emboss height is 1-20mm, bottom area 0.1-1.5cm ² It is preferable that it is the range of these. Moreover, it is preferable that the embossing is arranged on the entire surface or almost the entire surface of the embossed film 22 at intervals of 0.5 to 20 mm.
[0038]
As a preferred embodiment of the method for producing a cellular cushion sheet of the present invention, (1) the emboss 21 is formed on the embossed film 22, and (2) the base is formed on the embossed film 22 simultaneously with or after the emboss 21 is formed. The film 24 is wound, and (3) on the embossing roll, the embossed film 22 and the base film 24 are heat-bonded while being crimped to form the bubble part 3.
[0039]
An example of a more specific manufacturing method will be described with reference to FIG. FIG. 3 illustrates a process of manufacturing the buffer sheet 1 from the film 22 ′ (embossed film before emboss formation) and the base film 24. The film 22 ′ and the base film 24 used here may be an inflation film original fabric, or a T-die film original fabric may be used instead of the inflation film original fabric. The inflation film is formed by the film forming process shown in FIG.
[0040]
On the other hand, the film 22 ′ before becoming the embossed film 22 is preferably preheated before being sent to the embossed roll 109. For example, as shown in FIG. 3, it is preheated by the heating roll 107 via the roll 106, and sent to the embossing roll 109 via the roll 108. The temperature of the heating roll 107 may be maintained at a temperature not lower than the softening point of the embossed film 22 and not higher than 280 ° C., but a preferable range is not lower than the softening point of the embossed film 22 and higher than the melting point by 100 ° C. The range is as follows. The number of heating rolls 107 may be one, but is preferably two or more, and more preferably three for practical use so that sufficient preheating can be performed.
[0041]
The base film 24 is preferably preheated before being sent to the embossing roll 109. For example, the base film 24 is preheated by the heating roll 120 via the roll 119 and sent to the embossing roll 109. Although the temperature of the heating roll 120 should just be maintained above the softening point of the base film 24, a preferable range is above the softening point of the base film 24, and the range below the temperature 50 degreeC higher than the melting | fusing point. is there. Although the number of rolls of the heating roll 120 may be one, it is preferable that the number of rolls is two or more, and practically three so that sufficient heating can be performed.
[0042]
In the embossing roll 109, a large number of embosses 21 are formed on the film 22 ′ by heating the film 22 ′ before embossing formation with a vacuum pump with a vacuum degree of 40 to 100 hPa while heating. The embossing film 22 and the base film 24 are heat-sealed on the embossing roll 109 while being crimped by the pressure-bonding roll 121 to form the bubble part 3. Next, the buffer sheet 6 is formed by cooling with the cooling roll 111 while being pressed against the embossing roll 109. The buffer sheet 6 formed by the embossing roll 109 is further cooled sufficiently via the roll 112.
[0043]
Here, when the temperature of the embossing roll 109 exceeds 280 ° C., the embossing 21 of the embossing film 22 is not formed satisfactorily. Therefore, the temperature of the embossing roll 109 is 280 ° C. or less, and is usually heated below the melting point of the film. Is done. A preferable range from the embossed shape and the like is not higher than the melting point of the film and not less than 60 ° C. lower than the melting point, more preferably not more than 10 ° C. lower than the melting point of the film and not lower than the melting point. The temperature is lower by 40 ° C.
[0044]
Moreover, the inflation film original fabric which may be used in the manufacturing process of FIG. 3 is shape | molded by the inflation film formation process shown in FIG. In FIG. 4, the raw material resin is extruded from the extruder to the die 201 in the state of a molten resin melted by heat, blown air from below the die 201 and air-cooled to form the tubular film 2, and the adjustment plate 401 The film 2 is flattened by the rolls 101a and 101b, passed through the roll 102, and the film 2 is divided into the film 2a and the film 2b by the slit cutter 402. The film 2a passes through the roll 103a and the film 2b passes through the roll 103b. And each is wound up by a winder as an original fabric. The temperature at the outlet of the die 201 is preferably 150 to 210 ° C.
[0045]
FIG. 5 illustrates a process of manufacturing the buffer sheet 6 using the film 22 ′ and the base film 24 manufactured by the T-die film forming line. The film 22 ′ is extruded from the T die 202, and the base film 24 is extruded from the T die 203 and sent to the embossing rolls 109. The temperature at the outlets of the T dies 202 and 203 is usually 210 to 250 ° C, and practically preferably 230 to 250 ° C.
[0046]
In the embossing roll 109, the embossing 21 is formed by the same method as in FIG. 3, and the bubble part 3 is formed from the embossing film 22 and the base film 24. Next, the buffer sheet 6 is formed by cooling while being pressed against the embossing roll 109 by the cooling roll 111. The temperature of the embossing roll 109 is the same as in the case of FIG. The cooling roll 111 is preferably cooled by immersing a part of the cooling water in the roll 111. The buffer sheet 6 formed by the embossing roll 109 is further sufficiently cooled via the cooling roll 112. Further, the film is supplied in the form of a raw material to either the portion from the T die 202 to the embossing roll 109 or the portion from the T die 203 to the embossing roll 109 in FIG. It may be sent to a roll.
[0047]
Another preferred embodiment of the method for producing a cellular cushion sheet of the present invention will be described with reference to FIG. First, after the bubble portion 3 is manufactured as described above, (1) the top film 23 is wound so as to contact the embossed or protruding portion of the embossed film 22, and (2) the embossed or protruding portion on the pressure roll. 2 can be manufactured by the process of heat-sealing the top film 23 and the top film 23 together.
[0048]
As a more specific embodiment, FIG. 6 will be described. FIG. 6 shows a process of manufacturing the buffer sheet 7 by bonding the top film 23 to the buffer sheet 6. The top film 23 is preheated by the heating roll 116 via the roll 115 and sent to the heating roll 118. Although the temperature of the heating roll 116 is kept above the softening point of the top film 23, a preferable range is the softening point of the top film 23 or more, and a range below 10 ° C higher than the melting point. The number of rolls of the heating roll 116 may not be one, but is preferably three so that it can be sufficiently preheated. On the other hand, the buffer sheet 6 is preferably preheated before being sent to the heating roll 118 and the pressure-bonding roll 114.
[0049]
In the method for producing a cellular cushion sheet of the present invention shown in FIGS. 3 and 5, the molding speed is 1 to 60 m / min, further 2 to 40 m / min, the embossing side heating roll temperature 107 is 130 to 200 ° C., the base side The conditions that the heating roll temperature is 110 to 150 ° C., the embossing roll 109 is 70 to 110 ° C., and the seal roll 121 is 60 to 90 ° C. are preferable because they can be continuously manufactured without applying a load to the molding machine.
[0050]
【Example】
EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated, this invention is not limited only to these Examples.
[0051]
[Hydrogen chloride removal measurement method]
The buffer sheet is cut into small pieces, baked with a chlorine-containing film by the combustion tube type air method (850 ° C.), the gas generated by combustion is absorbed in a 0.4% sodium hydroxide aqueous solution, and 0.0282N mercury nitrate (II) The amount of chlorine is measured by titrating with a solution.
The sample used has a weight ratio of 10/1 between the non-chlorine buffer sheet and the chlorine-containing film.
[0052]
The amount of hydrogen chloride removed is calculated according to Equation 1.
[Expression 1]

[0053]
(Example 1, Comparative Example 1)
As the embossed film and the base film, those obtained by film-forming a polyethylene composition in which the components shown in Table 1 were previously mixed uniformly by dry blending were used.
The buffer sheet was manufactured by the film system shown in FIG. The production conditions are as follows: the heating roll is in the range of 130 to 200 ° C. on the embossed film side and the base film side is in the range of 110 to 150 ° C., the embossing roll is in the range of 70 to 110 ° C., the cooling roll is in the range of 60 to 90 ° C. It was 2-4 m / min.
The obtained buffer sheet was evaluated by a hydrogen chloride removal measurement method, and the results are shown in Table 1.
[0054]
(Examples 2-3)
As the embossed film and the base film, those obtained by film-forming a polyethylene composition in which the components shown in Table 2 were previously mixed uniformly by dry blending were used.
The buffer sheet was manufactured by the film system shown in FIG. The production conditions are as follows: the heating roll is in the range of 130 to 200 ° C. on the embossed film side and the base film side is in the range of 110 to 150 ° C., the embossing roll is in the range of 70 to 110 ° C., the cooling roll is in the range of 60 to 90 ° C. It was 2-4 m / min.
The obtained buffer sheet was evaluated by a hydrogen chloride removal measurement method, and the results are shown in Table 2.
[0055]
[Table 1]

[0056]
[Table 2]

[0057]
【The invention's effect】
The foam cushion sheet of the present invention can provide a foam cushion sheet capable of removing hydrogen chloride generated from combustion products containing other chlorine during the foam cushion sheet combustion.
The cellular cushion sheet of the present invention can provide a completely non-halogenated plastic cellular cushion sheet using a non-halogen flame retardant and a non-halogen colored component.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of one embodiment of the structure of a buffer sheet of the present invention.
FIG. 2 is an explanatory view of one embodiment of the structure of the buffer sheet of the present invention.
FIG. 3 is an explanatory view of one embodiment of a process for producing a buffer sheet of the present invention using an inflation film original fabric or the like.
FIG. 4 is an explanatory view of one embodiment of a method for forming an inflation film original fabric.
FIG. 5 is an explanatory diagram of an embodiment of a process for producing a buffer sheet by directly producing a film from a T-die film forming line.
FIG. 6 is an explanatory diagram of an embodiment of a process of bonding the buffer sheet 6 and the top film 23 together.
[Explanation of symbols]
1,7 Foam cushion sheet,
2, 2a, 2b, film,
3 Convex closed cell part (emboss) of embossed film,
21 Embossing,
22 Embossed film,
23 Top film,
24 Base film,
101a, 101b, 102, 103a, 103b, 106, 108, 115, 119 rolls,
107, 116, 118, 120 heating roll,
110, 114, 121 pressure roll,
109 embossing roll,
111, 112 cooling roll,
201 dice,
202, 203 T-die,
401 adjustment plate,
402 Slit cutter

Claims (4)

An embossed film having a convex portion having a thickness of 10 to 80 μm and a thickness other than the convex portion having a thickness of 15 to 200 μm, and a planar base film having a thickness of 15 to 150 μm. , A foamed cushion sheet having convex closed cells and / or a large number of convex protrusions, the thickness of the convex part is 10 to 80 μm, and the thickness other than the convex part is and the embossed film is 15 to 200 m, bonded to the base film having a thickness of 15~150μm in flat, the one having a convex closed cells of the embossed film, further planar to the top surface of the convex protrusion In the foam cushion sheet in which the top film having a thickness of 10 to 100 μm is bonded,
One or more films selected from an embossed film, a base film and a top film are (A1) 100 parts by weight of a resin component not containing halogen, and (B1) 5-20 parts by weight of slaked lime having a BET specific surface area of 8 m ² / g or more. And (B2) a foamed buffer sheet, which is a film containing 0.1 to 20 parts by weight of one or more fillers selected from activated carbon, silica and zeolite.   The cellular cushion sheet according to claim 1, wherein the cellular cushion sheet is colored using a coloring component not containing halogen.   One or more films selected from an embossed film, a base film, and a top film are (A1) 100 parts by weight of a resin component not containing a halogen, and (C1) 5-50 parts by weight of a flame retardant containing no halogen. The foam cushion sheet according to claim 1, which is a film containing   One or more films selected from an embossed film, a base film, and a top film are (A1) 100 parts by weight of a resin component not containing a halogen, and (C1) 5-50 parts by weight of a flame retardant containing no halogen. The foamed cushion sheet according to claim 1, wherein the foamed cushion sheet is colored with a coloring component not containing halogen.

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