JP2003145657A - Resin foam - Google Patents
Resin foamInfo
- Publication number
- JP2003145657A JP2003145657A JP2001351902A JP2001351902A JP2003145657A JP 2003145657 A JP2003145657 A JP 2003145657A JP 2001351902 A JP2001351902 A JP 2001351902A JP 2001351902 A JP2001351902 A JP 2001351902A JP 2003145657 A JP2003145657 A JP 2003145657A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- foam
- resin foam
- resin
- foamed layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂発泡体に関
し、特に微細な気泡を含有するとともに表面光沢性およ
び光反射性を有し、電子・電気部品の分野において光反
射材として好適に用いられる樹脂発泡体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin foam, and in particular, it contains fine bubbles and has surface gloss and light reflectivity, and is suitably used as a light reflecting material in the field of electronic and electric parts. It relates to a resin foam.
【０００２】[0002]
【従来の技術】従来、ポリエチレン、ポリスチレン、ポ
リプロピレンなどの発泡体は、その柔軟性、軽量性、断
熱性などの特徴を活かして、建材、包装材などに広く用
いられている。これらの発泡体の製造方法はビーズ発泡
と称され、あらかじめペレット状の樹脂にガスまたは液
状の発泡剤を含浸させておき、金型内で加熱して発泡さ
せる方法、分離型の発泡剤を混入しておき加熱発泡させ
る方法、または押出機中にて発泡剤と樹脂とを混合して
ダイの出口で発泡させる方法など様々な方法が行われて
いる。2. Description of the Related Art Conventionally, foams such as polyethylene, polystyrene and polypropylene have been widely used for building materials, packaging materials and the like by taking advantage of their characteristics such as flexibility, light weight and heat insulation. The method for producing these foams is called bead foaming, in which pelletized resin is impregnated with a gas or liquid foaming agent in advance, and the mixture is heated in a mold to foam, and a separate type foaming agent is mixed. Various methods such as a method of heating and foaming or a method of mixing a foaming agent and a resin in an extruder and foaming at the exit of a die are performed.
【０００３】しかし、いずれの方法で製造された樹脂発
泡体でも、表面の無発泡層に比べて内部の発泡層では気
泡径がより大きくかつ気泡が不均質になりやすい。この
ため、平滑な表面が得られず、表面光沢性に劣り、機械
的強度も低いなどの欠点があり、目的とする用途に対し
てその性能は不満足なものであった。However, in any of the resin foams produced by any of the methods, the bubble diameter of the foam layer inside is larger than that of the non-foam layer on the surface, and the cells are likely to be inhomogeneous. For this reason, there are drawbacks such that a smooth surface cannot be obtained, the surface gloss is inferior, and the mechanical strength is low, and the performance is unsatisfactory for the intended use.
【０００４】そこで最近では、米国特許第４，４７３，
６６５号明細書をはじめとして均一微細気泡を有する発
泡体の発明がなされている。また、特許第２９２５７４
５号には、光反射特性に優れた光反射板が開示されてい
る。しかし、この特許に記載されている光反射板は、拡
散反射率または全反射率は高いが、表面光沢度は不満足
であった。Therefore, recently, US Pat. No. 4,473,
The invention of a foam having uniform fine cells has been made including the specification of No. 665. Also, Japanese Patent No. 292574
No. 5 discloses a light reflection plate having excellent light reflection characteristics. However, the light reflection plate described in this patent has a high diffuse reflectance or a total reflectance, but the surface glossiness is unsatisfactory.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、均一
微細な気泡を有し、表面が平滑であり、表面の光反射特
性および光沢性（鏡面性）に優れた樹脂発泡体を提供す
ることにある。DISCLOSURE OF THE INVENTION An object of the present invention is to provide a resin foam having uniform fine bubbles, having a smooth surface, and having excellent light reflection characteristics and glossiness (specularity) of the surface. Especially.
【０００６】[0006]
【課題を解決するための手段】本発明の樹脂発泡体は、
発泡層と、該発泡層の少なくとも片方の表面に形成され
た無発泡層とを有する樹脂発泡体であって、前記無発泡
層の厚さ（Ｔ）と、前記無発泡層の内側に形成された前
記発泡層内の気泡の平均気泡径（φ）とが、以下の式
Ｔ／φ≧２
の関係を満たすことを特徴とする。The resin foam of the present invention comprises:
A resin foam having a foamed layer and a non-foamed layer formed on at least one surface of the foamed layer, wherein the resin foam has a thickness (T) of the non-foamed layer and is formed inside the non-foamed layer. Further, the average bubble diameter (φ) of the bubbles in the foamed layer satisfies the relationship of the following expression T / φ ≧ 2.
【０００７】[0007]
【発明の実施の形態】本発明の樹脂発泡体を形成する樹
脂は特に限定されないが、主に熱可塑性樹脂が好適に適
用できる。さらに好ましくは、ポリエチレンテレフタレ
ート、ポリエチレンナフタレート、ポリブチレンテレフ
タレート、ポリシクロヘキサンテレフタレート、ポリ−
１，４−シクロヘキサンジメチレンテレフタレート、ポ
リブチンナフタレートなどの熱可塑性ポリエステル樹脂
が挙げられる。また、２種以上の熱可塑性ポリエステル
樹脂を混合したアロイ系樹脂を用いてもよい。BEST MODE FOR CARRYING OUT THE INVENTION The resin forming the resin foam of the present invention is not particularly limited, but mainly thermoplastic resin can be preferably applied. More preferably, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polycyclohexane terephthalate, poly-
Examples include thermoplastic polyester resins such as 1,4-cyclohexanedimethylene terephthalate and polybutyne naphthalate. Moreover, you may use the alloy type resin which mixed 2 or more types of thermoplastic polyester resins.
【０００８】原料となる熱可塑性ポリエステル樹脂原料
には、表面光沢性、光反射性および発泡性に影響を及ぼ
さない範囲で、気泡化核剤、酸化防止剤、帯電防止剤、
紫外線吸収剤、光安定剤、顔料、滑剤などの各種添加剤
を配合してもよい。これらの添加剤の配合量は、得られ
る製品の特性を考慮して決定されるが、５重量％以下が
好ましい。The thermoplastic polyester resin raw material used as a raw material includes an aerated nucleating agent, an antioxidant, an antistatic agent, within a range that does not affect the surface glossiness, light reflectivity and foamability.
You may mix | blend various additives, such as a ultraviolet absorber, a light stabilizer, a pigment, and a lubricant. The blending amount of these additives is determined in consideration of the characteristics of the obtained product, but is preferably 5% by weight or less.
【０００９】本発明の樹脂発泡体は、発泡層と、発泡層
の少なくとも片方の表面に形成された無発泡層とを有す
る。無発泡層の厚さ（Ｔ）と、発泡層に含まれる気泡の
平均気泡径（φ）は、
Ｔ／φ≧２
の関係を満たす。より高い光沢度を得るためには、Ｔ／
φの値が５以上、さらに１０以上であることが好まし
い。The resin foam of the present invention has a foam layer and a non-foam layer formed on at least one surface of the foam layer. The thickness (T) of the non-foamed layer and the average cell diameter (φ) of the cells contained in the foamed layer satisfy the relationship of T / φ ≧ 2. To obtain higher gloss, T /
The value of φ is preferably 5 or more, and more preferably 10 or more.
【００１０】ここで、Ｔ／φの値が２より小さい場合、
すなわち無発泡層の厚さが薄い場合には、発泡層内に含
まれる気泡の影響が無発泡層の表面にも現れて、無発泡
層の表面が凹凸になるため、十分な表面光沢度が得られ
ない。Here, when the value of T / φ is less than 2,
That is, when the thickness of the non-foamed layer is thin, the effect of bubbles contained in the foamed layer also appears on the surface of the non-foamed layer, and the surface of the non-foamed layer becomes uneven, so that a sufficient surface glossiness is obtained. I can't get it.
【００１１】樹脂発泡体を主に電子・電気部品分野にお
ける光反射材に適用することを考慮すると、樹脂発泡体
の全体の厚さが薄く、発泡層に含まれる気泡が微細で均
一に分布していることが好ましい。この観点から、発泡
層に含まれる気泡の平均気泡径（φ）は５μｍ以下であ
ることが好ましく、３μｍ以下、さらには１μｍ以下が
より好ましい。また、無発泡層の厚さ（Ｔ）は、上式を
満たしていれば特に限定されないが、樹脂発泡体全体の
軽量化を考慮すると、５０μｍ以下、さらに１０μｍ以
下がより好ましい。Considering that the resin foam is mainly applied to a light-reflecting material in the field of electronic and electric parts, the entire thickness of the resin foam is thin, and the bubbles contained in the foam layer are fine and evenly distributed. Preferably. From this viewpoint, the average bubble diameter (φ) of the bubbles contained in the foam layer is preferably 5 μm or less, more preferably 3 μm or less, and further preferably 1 μm or less. The thickness (T) of the non-foamed layer is not particularly limited as long as the above formula is satisfied, but considering the weight reduction of the entire resin foam, it is preferably 50 μm or less, and more preferably 10 μm or less.
【００１２】本発明の樹脂発泡体は表層部が前述した構
成となっていればよく、発泡前の樹脂成形体は単層の成
形体でも２層以上の多層からなる成形体でもよい。例え
ば、多層の樹脂成形体の中間層に、高い発泡倍率で発泡
し得る樹脂層を挟むことにより、得られる樹脂発泡体全
体の軽量化が可能になる。また、多層の樹脂成形体を構
成する各層の樹脂は、同種のものでも異種のものでもよ
い。ただし、発泡工程や二次成形工程などで樹脂発泡体
が加熱されたときの、熱変形の差による層間剥離および
寸法安定性などを考慮すると、同種の樹脂を原料として
多層押出機や多層射出成形機などの製造設備により、層
状に形成された樹脂成形体を用いることが好ましい。な
お、層状の樹脂成形体の製造方法は特に限定されない。The resin foam of the present invention may have the surface layer portion having the above-mentioned constitution, and the resin molding before foaming may be a single-layer molding or a multi-layer molding comprising two or more layers. For example, by sandwiching a resin layer capable of foaming at a high expansion ratio between the intermediate layers of a multilayer resin molded product, it is possible to reduce the weight of the entire resin foam obtained. The resin of each layer constituting the multi-layer resin molded body may be the same or different. However, considering the delamination and dimensional stability due to the difference in thermal deformation when the resin foam is heated in the foaming process and secondary molding process, etc., the same type of resin is used as the raw material for the multi-layer extruder and multi-layer injection molding. It is preferable to use a resin molded body formed in layers by a manufacturing facility such as a machine. The method for producing the layered resin molded body is not particularly limited.
【００１３】本発明に係る樹脂発泡体の製造方法をより
詳細に説明する。まず、あらかじめ成形された未発泡の
樹脂成形体を高圧容器中に封入し、その容器に不活性ガ
スを注入し、未発泡樹脂成形体に不活性ガスを浸透させ
る。不活性ガスとしては、炭酸ガスを用いることが好ま
しい。この際、不活性ガスの圧力および浸透時間は特に
限定されない。ただし、高圧であれば浸透時間を短時間
とし、逆に低圧であれば浸透時間を長時間とすることが
好ましい。このようにして樹脂成形体中に不活性ガスを
十分に浸透させた後、圧力を解放し、取り出したガス浸
透樹脂成形体を加熱することにより発泡させる。発泡時
の加熱温度は発泡開始温度以上の範囲に設定する。発泡
開始温度とは、発泡倍率が１．１倍を超える温度を意味
する。この際、加熱手段は本発明の要件を満たす発泡体
が得られれば特に限定されないが、得られる発泡体の特
性を考慮して、急加熱する場合にはオイルなど、除加熱
する場合にはエアーオーブンなどが選択される。また、
加熱時間は気泡成長が完了する時間に設定する。例えば
０．５ｍｍ厚程度の樹脂成形体であれば、６０秒前後が
適当である。その後、冷却することにより、樹脂発泡体
を得る。The method for producing a resin foam according to the present invention will be described in more detail. First, a pre-molded unfoamed resin molding is enclosed in a high-pressure container, an inert gas is injected into the container, and the inert gas is permeated into the unfoamed resin molding. Carbon dioxide is preferably used as the inert gas. At this time, the pressure of the inert gas and the permeation time are not particularly limited. However, it is preferable that the permeation time is short if the pressure is high and the permeation time is long if the pressure is low. In this way, after the inert gas is sufficiently permeated into the resin molded body, the pressure is released, and the taken out gas permeated resin molded body is heated to foam. The heating temperature at the time of foaming is set to a range higher than the foaming start temperature. The foaming start temperature means a temperature at which the expansion ratio exceeds 1.1 times. At this time, the heating means is not particularly limited as long as a foam satisfying the requirements of the present invention is obtained, but in consideration of the characteristics of the obtained foam, oil or the like is used for rapid heating, and air is used for deheating. The oven is selected. Also,
The heating time is set to the time when the bubble growth is completed. For example, for a resin molded product having a thickness of about 0.5 mm, about 60 seconds is suitable. Then, the resin foam is obtained by cooling.
【００１４】なお、本発明の方法は特に限定されない
が、Ｔ／φ≧２を満たすためには、Ｔを大きくするか、
φを小さくする方法が考えられる。例えば、Ｔを厚くす
るためには、発泡前にスキン層をコントロールするため
にガス脱離工程を設けることが挙げられる。また、φを
小さくするためには、急加熱、ガス濃度を上げる、シー
トの物性をコントロールするなどの方法が挙げられる。The method of the present invention is not particularly limited, but in order to satisfy T / φ ≧ 2, T should be increased or
A method of reducing φ can be considered. For example, in order to increase T, a gas desorption step may be provided to control the skin layer before foaming. Further, in order to reduce φ, methods such as rapid heating, increasing the gas concentration, and controlling the physical properties of the sheet can be mentioned.
【００１５】このような方法によれば、不活性ガス（好
ましくは炭酸ガス）を用い、かつ発泡温度を発泡開始温
度以上の範囲に設定することにより、均一微細な気泡を
含有し、機械的強度と軽量性を兼ね備え、表面平滑性に
富み、表面光沢性および光反射特性に優れた樹脂発泡体
を得ることができる。According to such a method, by using an inert gas (preferably carbon dioxide gas) and setting the foaming temperature in the range of the foaming start temperature or higher, uniform fine bubbles are contained and mechanical strength is increased. It is possible to obtain a resin foam having excellent surface smoothness, surface glossiness, and light reflection properties.
【００１６】[0016]
【実施例】以下、本発明の実施例を説明するが、本発明
は必ずしもこれに限定されるものではない。EXAMPLES Examples of the present invention will be described below, but the present invention is not necessarily limited thereto.
【００１７】＜実施例１＞０．５ｍｍ厚のＰＥＮ成形シ
ート（帝人化成（株）製）と、セパレータとしてオレフ
ィン系不織布（ＦＴ３００グレード、日本バイリーン
（株）製）とを用意した。使用したＰＥＮ成形シートを
示差走査熱量計（セイコー電子工業社製）により熱分析
した結果、ガラス転移温度Ｔｇは１１０〜１１５℃の範
囲であった。ＰＥＮ成形シートとオレフィン系不織布と
を重ねて、ＰＥＮ成形シートの表面同士が接触する部分
がないように巻いてロールを作製した。このロールを室
温にて高圧力容器に封入し、６０ｋｇ／ｃｍ2の炭酸ガ
ス中に７日間静置してガスを浸透して飽和させた。圧力
解放後に高圧力容器からロールを取り出し、オレフィン
系不織布のセパレータを取り除きながらＰＥＮ成形シー
トだけを１８０℃に設定した熱風循環式発泡炉に発泡時
間が１分になるように連続的に供給して発泡させ、ＰＥ
Ｎ発泡体を作製した。Example 1 A PEN molded sheet having a thickness of 0.5 mm (manufactured by Teijin Kasei Co., Ltd.) and an olefin non-woven fabric (FT300 grade, manufactured by Japan Vilene Co., Ltd.) were prepared as separators. The PEN molded sheet used was subjected to a thermal analysis with a differential scanning calorimeter (manufactured by Seiko Denshi Kogyo Co., Ltd.), and as a result, the glass transition temperature Tg was in the range of 110 to 115 ° C. A PEN molded sheet and an olefin-based nonwoven fabric were overlaid and rolled so that the surfaces of the PEN molded sheet were not in contact with each other to prepare a roll. The roll was sealed in a high-pressure container at room temperature and allowed to stand in a carbon dioxide gas of 60 kg / cm 2 for 7 days to permeate the gas and saturate it. After releasing the pressure, the roll was taken out from the high pressure container, and while removing the olefin-based nonwoven fabric separator, the PEN molded sheet was continuously fed to the hot air circulation type foaming furnace set at 180 ° C. so that the foaming time was 1 minute. Foam and PE
N foam was made.
【００１８】＜実施例２＞５０ｋｇ／ｃｍ2の炭酸ガス
中に７日間静置してガスを浸透して飽和させた以外は実
施例１と同様な方法によりＰＥＮ発泡体を作製した。Example 2 A PEN foam was prepared in the same manner as in Example 1, except that the PEN foam was allowed to stand for 7 days in carbon dioxide gas of 50 kg / cm 2 to permeate and saturate the gas.
【００１９】＜比較例１＞ＰＥＮ成形シートを２３０℃
に設定した熱風循環式発泡炉に発泡時間が１分になるよ
うに連続的に供給して発泡させたこと以外は実施例１と
同様な方法によりＰＥＮ発泡体を作製した。<Comparative Example 1> PEN molded sheet at 230 ° C.
A PEN foam was produced by the same method as in Example 1 except that the hot air circulation type foaming furnace set to 1 was continuously fed so that the foaming time was 1 minute to perform foaming.
【００２０】＜比較例２＞０．６ｍｍ厚のＰＥＴ成形シ
ート（ユニチカ（株）製）を、２４０℃に設定した熱風
循環式発泡炉に発泡時間が１分になるように連続的に供
給した以外は、実施例１と同様な方法によりＰＥＴ発泡
体を作製した。Comparative Example 2 A 0.6 mm thick PET molded sheet (manufactured by Unitika Ltd.) was continuously supplied to a hot air circulation type foaming furnace set at 240 ° C. so that the foaming time was 1 minute. A PET foam was produced in the same manner as in Example 1 except for the above.
【００２１】＜比較例３＞通常、白色蛍光灯の光反射用
として天井面に固定されている一般の金属製白色塗装板
を用意した。<Comparative Example 3> Usually, a general white coating plate made of metal, which is fixed to the ceiling surface for reflecting light of a white fluorescent lamp, was prepared.
【００２２】得られた発泡体について、無発泡層の平均
厚さ（Ｔ）、平均気泡径（φ）、拡散反射率、全反射
率、表面光沢度（入射角度は２０°、６０°、８５°）
を測定した（比較例３については、発泡体としての物性
は無関係であるので記載していない）。これらの結果を
表１に示す。With respect to the obtained foam, the average thickness (T) of the non-foamed layer, the average cell diameter (φ), the diffuse reflectance, the total reflectance, and the surface glossiness (incident angle: 20 °, 60 °, 85) °)
Was measured (comparative example 3 is not described because the physical properties of the foam are irrelevant). The results are shown in Table 1.
【００２３】なお、具体的な測定方法および評価方法は
以下の通りである。無発泡層の平均厚さ（Ｔ）は、シー
ト断面のＳＥＭ写真を撮影し、一定断面積内に含まれる
無発泡層部分の厚さを５ポイント測定し、これを平均化
することにより求めた。The specific measuring method and evaluating method are as follows. The average thickness (T) of the non-foamed layer was obtained by taking a SEM photograph of the sheet cross section, measuring the thickness of the non-foamed layer portion included in the constant cross-sectional area at 5 points, and averaging the measured values. .
【００２４】平均気泡径（φ）は、シート断面のＳＥＭ
写真を撮影し、発泡層の一定断面積内に含まれる任意の
気泡３０点について、観測した気泡を球形に近似した場
合の直径を算出し、これを平均化することにより求め
た。The average bubble diameter (φ) is the SEM of the sheet cross section.
A photograph was taken, and for 30 arbitrary bubbles included in the constant cross-sectional area of the foam layer, the diameter when the observed bubbles were approximated to a sphere was calculated, and the diameter was calculated and averaged.
【００２５】図１に実施例１で得られた樹脂発泡体のＳ
ＥＭ写真を示す。図２に比較例１で得られた樹脂発泡体
のＳＥＭ写真を示す。図３に比較例２で得られた樹脂発
泡体のＳＥＭ写真を示す。図４に無発泡層の平均厚さ
（Ｔ）と平均気泡径（φ）との関係を示す。いずれの図
でも、１は発泡層、２は無発泡層を示す。FIG. 1 shows the S of the resin foam obtained in Example 1.
An EM photograph is shown. FIG. 2 shows an SEM photograph of the resin foam obtained in Comparative Example 1. FIG. 3 shows an SEM photograph of the resin foam obtained in Comparative Example 2. FIG. 4 shows the relationship between the average thickness (T) of the non-foamed layer and the average cell diameter (φ). In both figures, 1 indicates a foamed layer and 2 indicates a non-foamed layer.
【００２６】拡散反射率および全反射率は磁気分光光度
計（ＵＶ−３１０１ＰＣ：島津製作所（株）製）により
４００〜８００ｎｍの波長域で測定した。なお、表１に
おいては、硫酸バリウムの微粉末を固めた白板の拡散反
射率および全反射率をそれぞれ１００％として、各々の
発泡体シートの反射率を相対値で示している。The diffuse reflectance and the total reflectance were measured with a magnetic spectrophotometer (UV-3101PC: manufactured by Shimadzu Corporation) in the wavelength range of 400 to 800 nm. In addition, in Table 1, the diffuse reflectance and the total reflectance of the white plate in which the fine powder of barium sulfate is hardened are set to 100%, and the reflectance of each foam sheet is shown as a relative value.
【００２７】表面光沢度は光沢計（ＧＭ−２６８：ミノ
ルタ製）により、入射角度２０°、６０°、８５°の３
水準にて測定した。測定は全て試料数ｎ＝５で行い、そ
の平均値を求めた。The surface glossiness was measured by a gloss meter (GM-268: manufactured by Minolta), and the incident angles were 3 at 20 °, 60 ° and 85 °.
It was measured at the level. All measurements were performed with the number of samples n = 5, and the average value was calculated.
【００２８】[0028]
【表１】 [Table 1]
【００２９】表１に示されるように、無発泡層厚さ
（Ｔ）と平均気泡径（φ）との関係が、Ｔ／φ≧２の条
件を満たしていない比較例１および比較例２は、拡散反
射率および全反射率は良好な結果を示すものの光沢度が
著しく低い。また、比較例３は、光沢度が高いものの、
拡散反射率および全反射率が著しく低く光反射特性に欠
ける。一方、無発泡層厚さ（Ｔ）と平均気泡径（φ）と
の関係がＴ／φ≧２の条件を満たす実施例１および２
は、拡散反射率および全反射率だけでなく光沢度が良好
な結果を示し、光反射材として好適に用いることができ
る。As shown in Table 1, in Comparative Example 1 and Comparative Example 2, the relationship between the non-foaming layer thickness (T) and the average cell diameter (φ) does not satisfy the condition of T / φ ≧ 2. , The diffuse reflectance and the total reflectance show good results, but the gloss is extremely low. Further, Comparative Example 3 has high glossiness, but
Diffuse reflectance and total reflectance are remarkably low, and light reflection characteristics are lacking. On the other hand, Examples 1 and 2 in which the relationship between the non-foamed layer thickness (T) and the average cell diameter (φ) satisfies the condition of T / φ ≧ 2.
Shows good results not only in diffuse reflectance and total reflectance but also in glossiness, and can be suitably used as a light reflecting material.
【００３０】[0030]
【発明の効果】以上詳述したように本発明によれば、均
一微細な気泡を有し、表面が平滑であり、表面の光反射
特性と光沢性（鏡面性）を両方併せ持つ従来にない優れ
た樹脂発泡体を提供できる。As described above in detail, according to the present invention, it is possible to obtain uniform fine bubbles, smooth surface, and excellent light reflection characteristics and glossiness (specularity). A resin foam can be provided.
【図１】実施例１において製造された樹脂発泡体のＳＥ
Ｍ写真。FIG. 1 SE of the resin foam produced in Example 1.
M photo.
【図２】比較例１において製造された樹脂発泡体のＳＥ
Ｍ写真。FIG. 2 SE of the resin foam produced in Comparative Example 1
M photo.
【図３】比較例１において製造された樹脂発泡体のＳＥ
Ｍ写真。FIG. 3 SE of resin foam produced in Comparative Example 1
M photo.
【図４】無発泡層の平均厚さ（Ｔ）と平均気泡径（φ）
との関係を説明する図。FIG. 4 Average thickness (T) of non-foamed layer and average cell diameter (φ)
FIG.
１…発泡層 ２…無発泡層 1 ... Foam layer 2 ... Non-foamed layer
フロントページの続き Ｆターム(参考） 4F100 AK01A AK01B AK01C AK01D AK41A AK41D BA02 BA03 BA04 BA10A BA10B BA10C BA10D DJ01A DJ01D GB41 JB16A JB16D YY00A YY00DContinued front page F term (reference) 4F100 AK01A AK01B AK01C AK01D AK41A AK41D BA02 BA03 BA04 BA10A BA10B BA10C BA10D DJ01A DJ01D GB41 JB16A JB16D YY00A YY00D
Claims (4)
表面に形成された無発泡層とを有する樹脂発泡体であっ
て、前記無発泡層の厚さ（Ｔ）と、前記無発泡層の内側
に形成された前記発泡層内の気泡の平均気泡径（φ）と
が、以下の式 Ｔ／φ≧２ の関係を満たすことを特徴とする樹脂発泡体。1. A resin foam having a foamed layer and a non-foamed layer formed on at least one surface of the foamed layer, the thickness (T) of the non-foamed layer, and the non-foamed layer. A resin foam, characterized in that the average cell diameter (φ) of the cells in the foam layer formed on the inside of the resin satisfies the following formula T / φ ≧ 2.
泡層内の気泡の平均気泡径（φ）が５μｍ以下であるこ
とを特徴とする請求項１記載の樹脂発泡体。2. The resin foam according to claim 1, wherein an average cell diameter (φ) of cells formed inside the non-foaming layer is 5 μm or less.
発泡層で構成されることを特徴とする請求項１または２
記載の樹脂発泡体。3. The foam layer comprises a plurality of foam layers containing different resins.
The resin foam described.
からなることを特徴とする請求項１ないし３のいずれか
に記載の樹脂発泡体。4. The resin foam according to claim 1, comprising one or more kinds of thermoplastic polyester resins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001351902A JP3989230B2 (en) | 2001-11-16 | 2001-11-16 | Resin foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001351902A JP3989230B2 (en) | 2001-11-16 | 2001-11-16 | Resin foam |
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| Publication Number | Publication Date |
|---|---|
| JP2003145657A true JP2003145657A (en) | 2003-05-20 |
| JP3989230B2 JP3989230B2 (en) | 2007-10-10 |
Family
ID=19164148
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001351902A Expired - Lifetime JP3989230B2 (en) | 2001-11-16 | 2001-11-16 | Resin foam |
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| Country | Link |
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| JP (1) | JP3989230B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004049707A1 (en) * | 2002-11-26 | 2004-06-10 | Sony Corporation | Digital camera device and printing method of digital camera device |
| JP2008230138A (en) * | 2007-03-22 | 2008-10-02 | Furukawa Electric Co Ltd:The | Foamed resin structural material, optical reflecting board and method for producing foamed resin structural material |
| KR100864202B1 (en) * | 2005-07-13 | 2008-10-17 | 주식회사 코오롱 | Reflection sheet |
| KR101276461B1 (en) | 2004-09-14 | 2013-06-19 | 후루카와 덴키 고교 가부시키가이샤 | Thermoplastic Resin Foam |
| US9146338B2 (en) | 2005-08-31 | 2015-09-29 | Lg Chem, Ltd. | Reflection plate for backlight unit and backlight unit of liquid crystal display having good thermal conductivity |
| JP2015189050A (en) * | 2014-03-27 | 2015-11-02 | 積水化成品工業株式会社 | Foamed sheet laminate, fiber-reinforced composite, and production method of foamed sheet laminate |
| WO2018062541A1 (en) * | 2016-09-30 | 2018-04-05 | 富士フイルム株式会社 | Laminate structure |
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2001
- 2001-11-16 JP JP2001351902A patent/JP3989230B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004049707A1 (en) * | 2002-11-26 | 2004-06-10 | Sony Corporation | Digital camera device and printing method of digital camera device |
| KR101276461B1 (en) | 2004-09-14 | 2013-06-19 | 후루카와 덴키 고교 가부시키가이샤 | Thermoplastic Resin Foam |
| KR100864202B1 (en) * | 2005-07-13 | 2008-10-17 | 주식회사 코오롱 | Reflection sheet |
| US9146338B2 (en) | 2005-08-31 | 2015-09-29 | Lg Chem, Ltd. | Reflection plate for backlight unit and backlight unit of liquid crystal display having good thermal conductivity |
| US9442226B2 (en) | 2005-08-31 | 2016-09-13 | Lg Chem, Ltd. | Reflection plate for backlight unit and backlight unit of liquid crystal display having good thermal conductivity |
| JP2008230138A (en) * | 2007-03-22 | 2008-10-02 | Furukawa Electric Co Ltd:The | Foamed resin structural material, optical reflecting board and method for producing foamed resin structural material |
| JP2015189050A (en) * | 2014-03-27 | 2015-11-02 | 積水化成品工業株式会社 | Foamed sheet laminate, fiber-reinforced composite, and production method of foamed sheet laminate |
| WO2018062541A1 (en) * | 2016-09-30 | 2018-04-05 | 富士フイルム株式会社 | Laminate structure |
| JPWO2018062541A1 (en) * | 2016-09-30 | 2019-02-21 | 富士フイルム株式会社 | Laminated structure |
| CN109716009A (en) * | 2016-09-30 | 2019-05-03 | 富士胶片株式会社 | Stepped construction |
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| Publication number | Publication date |
|---|---|
| JP3989230B2 (en) | 2007-10-10 |
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