JPH045034A - Preparation of crosslinked polyolefin foamed sheet - Google Patents
Preparation of crosslinked polyolefin foamed sheetInfo
- Publication number
- JPH045034A JPH045034A JP2106945A JP10694590A JPH045034A JP H045034 A JPH045034 A JP H045034A JP 2106945 A JP2106945 A JP 2106945A JP 10694590 A JP10694590 A JP 10694590A JP H045034 A JPH045034 A JP H045034A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- base material
- olefin resin
- sheet base
- film
- 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
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 32
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 28
- 238000000465 moulding Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 8
- 230000001678 irradiating effect Effects 0.000 claims abstract description 5
- 238000010030 laminating Methods 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000011342 resin composition Substances 0.000 claims description 10
- 239000004604 Blowing Agent Substances 0.000 claims description 7
- 230000005865 ionizing radiation Effects 0.000 claims description 4
- 238000005187 foaming Methods 0.000 abstract description 11
- 238000004132 cross linking Methods 0.000 abstract description 7
- 230000005855 radiation Effects 0.000 abstract description 7
- 239000004156 Azodicarbonamide Substances 0.000 abstract description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 abstract description 4
- 235000019399 azodicarbonamide Nutrition 0.000 abstract description 4
- 239000004088 foaming agent Substances 0.000 abstract description 4
- 229920000092 linear low density polyethylene Polymers 0.000 abstract description 4
- 239000004707 linear low-density polyethylene Substances 0.000 abstract description 4
- 229920001684 low density polyethylene Polymers 0.000 abstract description 4
- 239000004702 low-density polyethylene Substances 0.000 abstract description 4
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 abstract description 3
- WVGXBYVKFQJQGN-UHFFFAOYSA-N 1-tert-butylperoxy-2-propan-2-ylbenzene Chemical compound CC(C)C1=CC=CC=C1OOC(C)(C)C WVGXBYVKFQJQGN-UHFFFAOYSA-N 0.000 abstract description 2
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 abstract description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 abstract description 2
- 150000002978 peroxides Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000010894 electron beam technology Methods 0.000 description 9
- 238000003475 lamination Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- 235000010523 Cicer arietinum Nutrition 0.000 description 1
- 244000045195 Cicer arietinum Species 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- DUIOPKIIICUYRZ-UHFFFAOYSA-N semicarbazide Chemical compound NNC(N)=O DUIOPKIIICUYRZ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、紙、布、プラスチックなど各種の被接着対象
物への熱融着性が優れており、かつ接着後の製品外観が
美しく、特に探しぼり品の成形加工用として好適である
架橋ポリオレフィン発泡シートの製造方法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention has excellent thermal adhesion to various objects to be adhered such as paper, cloth, and plastics, and has a beautiful appearance after adhesion. The present invention relates to a method for producing a crosslinked polyolefin foam sheet, which is particularly suitable for molding and processing found products.
（従来の技術）
従来、オレフィン系樹脂製シートの片面又は両面に熱可
塑性フィルムを積層したものを発泡させ、発泡積層シー
トを製造する方法として、特公昭５７３２６５７号公報
及び特公昭４７−４２９４９号公報に記載の方法が知ら
れている。(Prior Art) Conventionally, a method for manufacturing a foamed laminated sheet by foaming an olefin resin sheet laminated with a thermoplastic film on one or both sides is disclosed in Japanese Patent Publication No. 5732657 and Japanese Patent Publication No. 47-42949. The method described in is known.
（発明が解決しようとする課題）
上記の従来方法には次の問題点がある。特公昭５７−３
２６５７号公報に記載の方法は、発泡剤と架橋剤を含有
するポリオレフィンシートの片面に熱可塑性フィルムを
積層し、加熱発泡させる方法である。この方法により得
られた発泡体は、成形後の製品表面、即ち、フィルムか
積層されていない他方の面にも凹凸が生しているため、
製品の外観が損なわれ商品価値を低下させる。(Problems to be Solved by the Invention) The above conventional method has the following problems. Tokuko Sho 57-3
The method described in Japanese Patent No. 2657 is a method in which a thermoplastic film is laminated on one side of a polyolefin sheet containing a foaming agent and a crosslinking agent, and the film is heated and foamed. The foam obtained by this method has unevenness on the product surface after molding, that is, on the other side where the film is not laminated.
This damages the appearance of the product and lowers its commercial value.
また、特公昭４７−４２９４９号公報に記載の方法は、
熱分解型発泡剤を均一に分散した架橋ポリオレフィンか
らなる発泡性シートの両面に、架橋ポリオレフィン製フ
ィルムを貼り合わせた後、全体を加熱して発泡させる方
法である。この方法により得られた発泡体は、表面のポ
リオレフィンフィルムが架橋構造であるため、被着対象
物への接着性が悪い。また、成形加工性、特に、真空成
形による探しはり加工性か著しく低下する。In addition, the method described in Japanese Patent Publication No. 47-42949 is
This is a method in which crosslinked polyolefin films are laminated on both sides of a foamable sheet made of crosslinked polyolefin in which a thermally decomposable blowing agent is uniformly dispersed, and then the entire sheet is heated and foamed. The foam obtained by this method has poor adhesion to objects because the polyolefin film on the surface has a crosslinked structure. In addition, molding processability, especially finding processability by vacuum forming, is significantly reduced.
そこで本発明は、被接着対象物への熱融着性か優れ、成
形後の製品外観も良好で、成形加工性、特に探しぼり成
形加工性が優れている架橋ポリオレフィン発泡シートの
製造方法を提供することを目的とする。Accordingly, the present invention provides a method for producing a crosslinked polyolefin foam sheet that has excellent heat fusion properties to objects to be adhered, good product appearance after molding, and excellent molding processability, especially search molding processability. The purpose is to
（課題を解決するための手段及び作用）上記目的を達成
するため本発明は、オレフィン系樹脂、発泡剤及び架橋
剤を含有するオレフィン系樹脂組成物を成形してなるシ
ート基材の一面上に、オレフィン系樹脂を成形してなる
フィルムを積層した後、該シート基材の他方の面に電離
性放射線を照射し、次に全体を加熱することを特徴とす
る架橋ポリオレフィン発泡シートの製造方法を提供する
。(Means and effects for solving the problems) In order to achieve the above object, the present invention provides a sheet base material formed by molding an olefin resin composition containing an olefin resin, a blowing agent, and a crosslinking agent. , a method for producing a crosslinked polyolefin foam sheet, which comprises laminating films formed by molding olefin resins, irradiating the other side of the sheet base material with ionizing radiation, and then heating the entire sheet. provide.
本発明の製造方法においては、まず、オレフィン系樹脂
組成物を成形してなるシート基材の一面に、オレフィン
系樹脂を成形してなるフィルムを積層する。この積層方
法としては、例えば、シート基材成形用のオレフィン系
樹脂組成物と、フィルム成形用のオレフィン系樹脂とを
同時に二層押出成形する方法、又はシート基材とフィル
ムを別途成形した後、シート基材に含有させた発泡剤が
熱分解しない温度でフィルムを熱融着させる方法を適用
することができる。In the manufacturing method of the present invention, first, a film formed by molding an olefin resin is laminated on one surface of a sheet base material formed by molding an olefin resin composition. This lamination method includes, for example, a method in which an olefin resin composition for sheet base material molding and an olefin resin composition for film molding are simultaneously extruded in two layers, or after separately molding the sheet base material and the film. A method can be applied in which the film is thermally fused at a temperature at which the blowing agent contained in the sheet base material does not decompose.
シート基材は、下記組成のオレフィン系樹脂組成物を成
形してなるものである。The sheet base material is formed by molding an olefin resin composition having the following composition.
オレフィン系樹脂組成物を構成するオレフィン系樹脂と
しては、低密度ポリエチレン、直鎖状低密度ポリエチレ
ン、エチレン−酢酸ビニル共重合体、エチレン−アクリ
ル酸アルキルエステル共重合体などを挙げることができ
る。これらは単独で又は２種以上を適宜組み合わせて用
いることができる。なお、かかるオレフィン系樹脂には
、変性剤として高密度ポリエチレン、ポリプロピレン、
ポリブタジェン、エチレン−プロピレン共重合体、塩素
化ポリエチレン、ポリスチレンなどを適量添加すること
ができる。Examples of the olefin resin constituting the olefin resin composition include low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, and ethylene-acrylic acid alkyl ester copolymer. These can be used alone or in an appropriate combination of two or more. In addition, such olefin resins include high density polyethylene, polypropylene,
Appropriate amounts of polybutadiene, ethylene-propylene copolymer, chlorinated polyethylene, polystyrene, etc. can be added.
オレフィン系樹脂組成物を構成する発泡剤としては、加
熱時に熱分解してガスを発生するものであれば特に制限
されない。この発泡剤としては、アゾジカルボンアミド
、Ｎ、Ｎ’ −ジニトロソペンタメチレンテトラミン
、ジフェニル−４，４ジスルホンアミド、４，４° −
オキシビス（ペンセンスルホニル）セミカルバジドなど
を挙げることかできる。これらは単独で又は２種以上を
適宜組み合わせて用いることかできる。The blowing agent constituting the olefin resin composition is not particularly limited as long as it is thermally decomposed to generate gas when heated. Examples of the blowing agent include azodicarbonamide, N,N'-dinitrosopentamethylenetetramine, diphenyl-4,4disulfonamide, 4,4°-
Oxybis(pensene sulfonyl) semicarbazide and the like can be mentioned. These can be used alone or in an appropriate combination of two or more.
発泡剤の配合量は、目的とする発泡体の発泡倍率により
適宜選択されるが、通常は、オレフィン系樹脂１００重
量部に対して２〜３０重量部が好ましい。The amount of the blowing agent to be added is appropriately selected depending on the expansion ratio of the desired foam, but it is usually preferably 2 to 30 parts by weight based on 100 parts by weight of the olefin resin.
オレフィン系樹脂組成物を構成する架橋剤としては、熱
分解してラジカルを発生するものであれば特に制限され
ない。この架橋剤としては、ジクミルペルオキシド、ジ
−ｔ−ブチルペルオキシド、ｔ−ブチルペルオキシクメ
ン、２，５−ジメチル２．５−ジ（ｔ−ブチルペルオキ
シ）ヘキサンなどの有機過酸化物を挙げることができる
。The crosslinking agent constituting the olefin resin composition is not particularly limited as long as it is thermally decomposed to generate radicals. Examples of the crosslinking agent include organic peroxides such as dicumyl peroxide, di-t-butyl peroxide, t-butylperoxycumene, and 2,5-dimethyl-2,5-di(t-butylperoxy)hexane. can.
架橋剤の配合量は、オレフィン系樹脂１００重量部に対
して０．３〜５重量部が好ましい。The blending amount of the crosslinking agent is preferably 0.3 to 5 parts by weight per 100 parts by weight of the olefin resin.
また、オレフィン系樹脂組成物には、必要に応して老化
防止剤、着色剤、加工助剤、発泡助剤、難燃剤、架橋助
剤などを配合することができる。Further, the olefin resin composition may contain an antiaging agent, a coloring agent, a processing aid, a foaming aid, a flame retardant, a crosslinking aid, and the like, if necessary.
シート基材に積層するフィルムは、オレフィン系樹脂を
成形してなるものである。ここで用いるオレフィン系樹
脂は特に制限されないが、融点か６０〜１５０℃の範囲
内にあるものが紙や各種プラスチックなどの被接着対象
物への接着性がよいために好ましい。このオレフィン系
樹脂としては、低密度ポリオレフィン、直鎖状低密度ポ
リエチレン、エチレン−酢酸ビニル共重合体、エチレン
−アクリル酸エチル共重合体、エチレン−アクリル酸共
重合体、エチレン−アクリル酸エチル共重合体、エチレ
ン−酢酸ビニルー−酸化炭素三元共重合体などを挙げる
ことができる。これらは単独で又は２種以上を適宜組み
合わせて用いることができる。The film laminated on the sheet base material is formed by molding an olefin resin. The olefin resin used here is not particularly limited, but one having a melting point within the range of 60 to 150°C is preferable because it has good adhesion to objects to be adhered such as paper and various plastics. Examples of this olefin resin include low density polyolefin, linear low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, and ethylene-ethyl acrylate copolymer. Examples include ethylene-vinyl acetate-carbon oxide terpolymer. These can be used alone or in an appropriate combination of two or more.
また、かかるフィルム成形用のオレフィン系樹脂には、
接着性を向上させるために粘着付与剤などを配合するこ
とかできる。In addition, the olefin resin for film molding includes
A tackifier or the like may be added to improve adhesion.
このフィルムの厚さは０．０５〜０．３０ ｍｍか好ま
しい。厚さか０．０５ ｍｍ未満ては積層後に加熱発泡
させた場合にフィルム厚が薄くなりすき、被着対象物と
熱融着する場合に接着性か低下して接着不良が生しるた
め好ましくない。また、厚さか０．３０ｍｍを超えると
積層後に加熱発泡させる時、発泡によるカスの放散か不
安定になるため好ましくない。The thickness of this film is preferably 0.05 to 0.30 mm. If the thickness is less than 0.05 mm, the film thickness will become thinner when heated and foamed after lamination, and adhesion will decrease when heat-sealed to the object to be adhered, resulting in poor adhesion, which is not preferable. . Moreover, if the thickness exceeds 0.30 mm, it is not preferable because when heating and foaming is performed after lamination, the dispersion of scum due to foaming becomes unstable.
次に、シート基材のフィルム積層面とは反対面に、電離
性放射線を照射する。この照射によって、シート基材の
表面及びその近傍において架橋反応が進行する。Next, ionizing radiation is irradiated onto the opposite side of the sheet base material from the film lamination side. This irradiation causes a crosslinking reaction to proceed on the surface of the sheet base material and its vicinity.
電離性放射線としては、電子線、γ線、中性子線などを
挙げることができる。これらのなかでも照射線量及び透
過力等の制御が容易で実用的であるため電子線が好まし
い。Examples of ionizing radiation include electron beams, gamma rays, and neutron beams. Among these, electron beams are preferred because the irradiation dose, penetrating power, etc. can be easily controlled and practical.
照射線量は２．０〜１２． ＯＭｒａｄの範囲内が好ま
しい。照射線量が２． ＯＭｒａｄ未満であると発泡終
了時においてシート基材表面に若干の凹凸が残るため好
ましくない。照射線量が１２．０ Ｍｒａｄを超えると
放射線を照射したシート基材表面の架橋度か、反対側の
シート基材表面の架橋度に比へて大きくなりすぎ、次の
加熱発泡時においてシート基材がカールして発泡を阻害
するため好ましくない。特に好ましい照射線量は３〜８
Ｍｒａｄである。また、電子線照射時における加速電
圧は、２００〜４００ＫｅＶの範囲内か好ましい。The irradiation dose is 2.0 to 12. It is preferably within the range of OMrad. The irradiation dose is 2. If it is less than OMrad, some unevenness will remain on the surface of the sheet base material at the end of foaming, which is not preferable. If the irradiation dose exceeds 12.0 Mrad, the degree of crosslinking on the surface of the sheet base material irradiated with radiation will be too large compared to the degree of crosslinking on the surface of the sheet base material on the opposite side, and the sheet base material will be is undesirable because it curls and inhibits foaming. Particularly preferred irradiation dose is 3 to 8
This is Mrad. Further, the acceleration voltage during electron beam irradiation is preferably within the range of 200 to 400 KeV.
このように放射線照射した後、上記シート基材とフィル
ムとの積層シートを加熱し、発泡させることにより発泡
シートを得る。加熱は、含有させた発泡剤か十分に発泡
できるように温度及び時間を適宜調節する。After irradiating with radiation in this manner, the laminated sheet of the sheet base material and film is heated and foamed to obtain a foamed sheet. The heating temperature and time are adjusted appropriately so that the foaming agent contained can be sufficiently foamed.
本発明の製造方法は、発泡処理前にフィルム積層面と反
対面のシート基材表面を放射線架橋させるため、後の発
泡工程において該シート基材面からガスが放散すること
かない。また、積層されたフィルム面は架橋されていな
いため熱融着させ易い。In the manufacturing method of the present invention, the surface of the sheet substrate opposite to the film lamination surface is crosslinked by radiation before the foaming treatment, so that gas does not diffuse from the surface of the sheet substrate in the subsequent foaming step. Furthermore, since the laminated film surfaces are not crosslinked, they are easily heat-sealed.
（実施例）
低密度ポリエチレン（商品名ニッパチックピー２５１；
三菱化成工業社製）１００重量部、アゾンカルボンアミ
ド１５重量部及びジクミルペルオキシｌ”０．６重量部
を混練りし、押出成形して厚さ１．２ｍｍのシート基材
を得た。このシート基材の一面に厚さ０．２０ ｍｍの
前記低密度ポリエチレン製のフィルムを、温度１３０℃
で熱間プレスによりラミネートして厚さ約１．４ ｍｍ
の積層シートを得た。(Example) Low density polyethylene (trade name Nipper Chick Pea 251;
(manufactured by Mitsubishi Chemical Industries, Ltd.), 15 parts by weight of azone carbonamide, and 0.6 parts by weight of dicumylperoxyl were kneaded and extruded to obtain a sheet base material with a thickness of 1.2 mm. The low density polyethylene film with a thickness of 0.20 mm was placed on one side of the sheet base material at a temperature of 130°C.
Laminated by hot pressing to a thickness of approximately 1.4 mm.
A laminated sheet was obtained.
次に、この積層シートのフィルム積層面と反対側のシー
ト基材表面に、加速電圧３００ ＫｅＶの電子線を照射
線量が４ Ｍｒａｄとなるように照射して、該シート基
材表面及びその近傍において架橋反応させた。その後、
積層シート全体を２３０’Ｃの加熱炉内に導入し、加熱
発泡させて発泡シートを得た。Next, an electron beam with an acceleration voltage of 300 KeV was irradiated to the surface of the sheet base material on the opposite side to the film laminated surface of this laminated sheet so that the irradiation dose was 4 Mrad, and the surface of the sheet base material and its vicinity were irradiated with an electron beam having an acceleration voltage of 300 KeV. A crosslinking reaction was carried out. after that,
The entire laminated sheet was introduced into a heating furnace at 230'C, and heated and foamed to obtain a foamed sheet.
この発泡シートの熱融着性、成形加工性及び加工後の製
品外観を次の方法により試験した。結果を第１表に示す
。The heat fusion properties, moldability, and appearance of the product after processing of this foamed sheet were tested by the following methods. The results are shown in Table 1.
熱融着性：発泡シートのフィルム表面を、ドライヤー（
１００Ｖ、１２００Ｗ）で５秒間加熱後、台紙に押圧（
圧力２００ ｇ／ｃｍ” ） Ｌ、、熱融着させたもの
について剥離試験を行った。そして、剥離強さが０．５
ｋｇ／ ２０＋ｎｍ以上の場合を熱融着性が良好と判
定し、０．５ ｋｇ／ ２０ｍｍ未満の場合を不良と判
定した。Thermal adhesiveness: Heat the film surface of the foam sheet with a dryer (
After heating for 5 seconds at 100V, 1200W), press it on the mount (
A peel test was conducted on the heat-sealed material with a pressure of 200 g/cm'').The peel strength was 0.5.
kg/20+nm or more was determined to have good thermal fusion properties, and when it was less than 0.5 kg/20 mm, it was determined to be poor.
成形加工性：真空成形により探しほり品の成形をする場
合に、しほり比（深さ／直径）を２０／３０以上とする
ことか可能なものを成形加工性が良好と判定し、そうで
ないものを不良と判定した。Molding workability: When molding a searched product by vacuum forming, those that can achieve a drawdown ratio (depth/diameter) of 20/30 or more are judged to have good moldability, and those that are not. was determined to be defective.
加工後の製品外観：前記真空成形した探しほり品の外観
を目視により観察し、凹凸がないものを外観が良好と判
定し、凹凸か多いものを不良と判定した。Product appearance after processing: The appearance of the vacuum-formed search product was visually observed, and those with no unevenness were judged to have a good appearance, and those with many unevenness were judged to be defective.
実施例２
実施例■において、厚さＯ，ｌ Ｏｍｍのフィルムを用
い、電子線の照射線量を３ Ｍｒａｄとしたほがは同様
にして発泡シートを得た。この発泡シートについて実施
例１と同様の試験をした。結果を第１表に示す。Example 2 A foamed sheet was obtained in the same manner as in Example 2, except that a film with a thickness of 0.1 Omm was used and the electron beam irradiation dose was 3 Mrad. The same test as in Example 1 was conducted on this foam sheet. The results are shown in Table 1.
実施例３
実施例１において、シート基材の成形用材料としてツバ
チックＦ−２５１を７０重量部、直鎖状低密度ポリエチ
レン（商品名 ＮＵＣＧ５２２０日本ユニカー社製）３
０重量部、アゾジカルボンアミド１５重量部及びジクミ
ルペルオキシド０．８重量部を用いたほかは同様にして
発泡シートを得た。Example 3 In Example 1, 70 parts by weight of Tubatic F-251 and linear low-density polyethylene (trade name NUCG5220 manufactured by Nippon Unicar Co., Ltd.) 3 were used as a molding material for the sheet base material.
A foamed sheet was obtained in the same manner except that 0 parts by weight, 15 parts by weight of azodicarbonamide and 0.8 parts by weight of dicumyl peroxide were used.
この発泡シートについて実施例１と同様の試験をした。The same test as in Example 1 was conducted on this foam sheet.
結果を第１表に示す。The results are shown in Table 1.
実施例４
実施例３において、電子線の照射を加速電圧４００Ｋｅ
ｙ、照射線量を３ Ｍｒａｄとしたほかは同様にして発
泡シートを得た。この発泡シートについて実施例１と同
様の試験をした。結果を第１表に示す。Example 4 In Example 3, electron beam irradiation was performed at an accelerating voltage of 400Ke.
A foam sheet was obtained in the same manner except that the irradiation dose was changed to 3 Mrad. The same test as in Example 1 was conducted on this foam sheet. The results are shown in Table 1.
実施例５
実施例１において、アゾジカルボンアミドの配合量を１
２重量部とし、フィルムをエチレン−酢酸ビニル共重合
体（酢酸ビニル単位含有量５重量％）製の厚さ０．２５
ｍｍのものとしたほかは同様にして発泡シートを得た。Example 5 In Example 1, the amount of azodicarbonamide was 1
2 parts by weight, and the film was made of ethylene-vinyl acetate copolymer (vinyl acetate unit content: 5% by weight) with a thickness of 0.25%.
A foamed sheet was obtained in the same manner except that the foamed sheet had a diameter of mm.
この発泡シートについて実施例１と同様の試験をした。The same test as in Example 1 was conducted on this foam sheet.
結果を第１表に示す。The results are shown in Table 1.
比較例１
実施例１において、フィルムを積層をせず、電子線の照
射もしないほかは同様にして発泡シートを得た。この発
泡シートについて実施例１と同様の試験をした。結果を
第１表に示す。Comparative Example 1 A foamed sheet was obtained in the same manner as in Example 1, except that no films were laminated and no electron beam irradiation was performed. The same test as in Example 1 was conducted on this foam sheet. The results are shown in Table 1.
比較例２
実施例１において、電子線の照射をしないほがは同様に
して発泡シートを得た。この発泡シートについて実施例
１と同様の試験をした。結果を第１表に示す。Comparative Example 2 A foamed sheet was obtained in the same manner as in Example 1 except that the electron beam irradiation was not performed. The same test as in Example 1 was conducted on this foam sheet. The results are shown in Table 1.
比較例３
実施例１において、フィルムの積層をしないほかは同様
にして発泡シートを得た。この発泡シートについて実施
例１と同様の試験をした。結果を第１表に示す。Comparative Example 3 A foamed sheet was obtained in the same manner as in Example 1, except that the films were not laminated. The same test as in Example 1 was conducted on this foam sheet. The results are shown in Table 1.
（以下余白）
（発明の効果）
本発明の製造方法においては、シート基材とその一面に
のみフィルムを積層してなる積層シートの該シート基材
表面（フィルム積層面と反対面）に、放射線を照射して
架橋反応をさせた後、加熱して発泡させる。このために
加熱発泡時においては、フィルム面側からガスが放散さ
れ、該シート基材表面からはカスが放散されることがな
い。また、積層したフィルム自体は架橋されていない。(Margins below) (Effects of the Invention) In the manufacturing method of the present invention, radiation radiation is applied to the surface of the sheet base material (the surface opposite to the film laminated surface) of a laminated sheet formed by laminating a sheet base material and a film only on one surface thereof. is irradiated to cause a crosslinking reaction, and then heated to cause foaming. For this reason, during heating and foaming, gas is dissipated from the film surface side, and no residue is dissipated from the surface of the sheet base material. Further, the laminated films themselves are not crosslinked.
本発明の製造方法により得られた発泡シートは、積層し
たフィルム面を介して被接着対象物に接着させた場合、
外表面を形成するシート基材表面が平滑で美しいため製
品価値を向上させる。一方、被接着対象物への接着面と
なるフィルム面は、熱融着性が優れている。また、該発
泡シートは、成形加工性、特に探しほり品の成形加工性
が優れている。このような優れた効果を有することから
本発明の製造方法により得られた発泡シートは、自動車
内装用のシート材料及び各種ケースの内張り用シート材
料として好適である。When the foam sheet obtained by the production method of the present invention is adhered to an object through the laminated film surface,
The sheet base material surface that forms the outer surface is smooth and beautiful, improving product value. On the other hand, the film surface that becomes the adhesive surface to the object to be adhered has excellent heat fusion properties. Further, the foamed sheet has excellent molding processability, especially molding processability for search products. Since it has such excellent effects, the foamed sheet obtained by the manufacturing method of the present invention is suitable as a sheet material for automobile interiors and a sheet material for lining of various cases.
Claims (1)
フィン系樹脂組成物を成形してなるシート基材の一面上
に、オレフィン系樹脂を成形してなるフィルムを積層し
た後、該シート基材の他方の面に電離性放射線を照射し
、次に全体を加熱することを特徴とする架橋ポリオレフ
ィン発泡シートの製造方法。After laminating a film formed by molding an olefin resin on one side of a sheet base formed by molding an olefin resin composition containing an olefin resin, a blowing agent, and a crosslinking agent, the other side of the sheet base material is laminated. A method for producing a crosslinked polyolefin foam sheet, which comprises irradiating the surface of the sheet with ionizing radiation and then heating the entire sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2106945A JPH045034A (en) | 1990-04-23 | 1990-04-23 | Preparation of crosslinked polyolefin foamed sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2106945A JPH045034A (en) | 1990-04-23 | 1990-04-23 | Preparation of crosslinked polyolefin foamed sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH045034A true JPH045034A (en) | 1992-01-09 |
Family
ID=14446514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2106945A Pending JPH045034A (en) | 1990-04-23 | 1990-04-23 | Preparation of crosslinked polyolefin foamed sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045034A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095776A (en) * | 2004-09-28 | 2006-04-13 | Dainippon Printing Co Ltd | Method for producing foamed wallpaper |
| JP2008246792A (en) * | 2007-03-29 | 2008-10-16 | Dainippon Printing Co Ltd | Manufacturing method for foamed decorative sheet |
-
1990
- 1990-04-23 JP JP2106945A patent/JPH045034A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095776A (en) * | 2004-09-28 | 2006-04-13 | Dainippon Printing Co Ltd | Method for producing foamed wallpaper |
| JP4565947B2 (en) * | 2004-09-28 | 2010-10-20 | 大日本印刷株式会社 | Method for producing foam wallpaper |
| JP2008246792A (en) * | 2007-03-29 | 2008-10-16 | Dainippon Printing Co Ltd | Manufacturing method for foamed decorative sheet |
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