JPS6366337B2 - - Google Patents
Info
- Publication number
- JPS6366337B2 JPS6366337B2 JP57135465A JP13546582A JPS6366337B2 JP S6366337 B2 JPS6366337 B2 JP S6366337B2 JP 57135465 A JP57135465 A JP 57135465A JP 13546582 A JP13546582 A JP 13546582A JP S6366337 B2 JPS6366337 B2 JP S6366337B2
- Authority
- JP
- Japan
- Prior art keywords
- foam
- weight
- parts
- foaming
- extruder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000006260 foam Substances 0.000 claims description 32
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 25
- 238000005187 foaming Methods 0.000 claims description 13
- 239000011780 sodium chloride Substances 0.000 claims description 13
- 229920005990 polystyrene resin Polymers 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 8
- 239000004604 Blowing Agent Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000001125 extrusion Methods 0.000 description 15
- 238000002834 transmittance Methods 0.000 description 13
- 235000002639 sodium chloride Nutrition 0.000 description 12
- 239000004793 Polystyrene Substances 0.000 description 8
- 229920002223 polystyrene Polymers 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 229920006026 co-polymeric resin Polymers 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 239000002667 nucleating agent Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- BOSAWIQFTJIYIS-UHFFFAOYSA-N 1,1,1-trichloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Cl)Cl BOSAWIQFTJIYIS-UHFFFAOYSA-N 0.000 description 1
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- -1 butane and pentane Chemical compound 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 229940042935 dichlorodifluoromethane Drugs 0.000 description 1
- UMNKXPULIDJLSU-UHFFFAOYSA-N dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 description 1
- 229940099364 dichlorofluoromethane Drugs 0.000 description 1
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229940050176 methyl chloride Drugs 0.000 description 1
- 229940073584 methylene chloride Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
- B29C44/507—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through an annular die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/001—Tubular films, sleeves
Landscapes
- Molding Of Porous Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明は、巨大気泡を有する透光性発泡体の
製造方法に関する。さらに詳しくは、均一で優れ
た透光性を備えた、巨大気泡を有する透光性発泡
体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a translucent foam having giant cells. More specifically, the present invention relates to a method for producing a light-transmitting foam having uniform and excellent light-transmitting properties and having giant cells.
最近、光線透過率の高い熱可塑性樹脂を基材樹
脂としこれを発泡させた発泡体からなる透光性の
断熱材が障子や採光口用などの材料として提案さ
れている。透光性の良好な発泡体を得るためには
通常、発泡倍率を高くしとくにその発泡径を大き
く均一化することが要求され、樹脂によつて種々
の発泡方法が検討されている。しかしながら、従
来発泡体製造用として最も汎用されているポリス
チレン等のポリスチレン系樹脂を基材樹脂とした
場合、通常の押出発泡方法では透光性の良好な発
泡体を得ることは困難とされている。すなわち、
押出発泡において気泡径を大きくするためには通
常、用いられるタルク等の発泡核剤の量を減少さ
せることが考えられるが、これによつて気泡の巨
大化は若干生じるがその気泡は不均一で透光性も
不均一となりさらに表面の平滑性が損なわれる
等、実質的に均一で優れた透光性を備えたポリス
チレン系樹脂発泡体を得ることは困難であつた。 Recently, a light-transmitting heat insulating material made of a foam made from a thermoplastic resin with high light transmittance as a base resin has been proposed as a material for shoji screens, daylight openings, and the like. In order to obtain a foam with good translucency, it is usually required to increase the expansion ratio and, in particular, to make the foam diameter large and uniform, and various foaming methods have been studied depending on the resin. However, when the base resin is polystyrene-based resin such as polystyrene, which is the most commonly used material for producing foams, it is difficult to obtain foams with good translucency using normal extrusion foaming methods. . That is,
In order to increase the cell diameter in extrusion foaming, it is usually considered to reduce the amount of foaming nucleating agent such as talc used, but although this causes the bubbles to become slightly larger, the bubbles are not uniform. It has been difficult to obtain a polystyrene resin foam with substantially uniform and excellent light transmittance, such as non-uniform light transmittance and impaired surface smoothness.
この発明は、かような従来の問題点を解消すべ
くなされたものであり、ポリスチレン系樹脂を基
材樹脂として押出発泡法により均一で優れた透光
性を備えた、巨大気泡を有する発泡体を得る新規
な製造方法を提供するものである。この発明の発
明者らは、ポリスチレン系樹脂を押出発泡するに
際し、タルク等の従来の発泡核剤を全く用いず
に、これらと全く異なる少量の塩化ナトリウムを
用いかつ種々の発泡剤の中でも揮発性発泡剤と組
合せることにより、所望の透光性発泡体が得られ
る事実を見出しこの発明に到達した。 This invention was made in order to solve the above-mentioned conventional problems, and it provides a foam having uniform and excellent translucency and having giant cells, which is produced by an extrusion foaming method using a polystyrene resin as a base resin. The present invention provides a new manufacturing method for obtaining. When extruding and foaming polystyrene resin, the inventors of this invention did not use any conventional foaming nucleating agents such as talc, but instead used a small amount of sodium chloride, which is completely different from these, and used a volatile foaming agent among various foaming agents. The present invention was achieved by discovering that a desired translucent foam can be obtained by combining it with a foaming agent.
かくしてこの発明によればポリスチレン系樹脂
と少量の塩化ナトリウムを押出機内に供給して加
熱溶融し、これを揮発性発泡剤により押出発泡さ
せることを特徴とする巨大気泡を有する透光性発
泡体の製造方法が提供される。 According to the present invention, a polystyrene resin and a small amount of sodium chloride are fed into an extruder, heated and melted, and then extruded and foamed using a volatile foaming agent. A manufacturing method is provided.
この発明のポリスチレン系樹脂としてはポリス
チレンやポリスチレンを主体とする共重合体でポ
リスチレンと同程度の透光性を有するものが挙げ
られる。通常、押出発泡に供される公知のポリス
チレンを用いるのが一般的であるが、ことに最終
的に得られる発泡体の接着性や耐熱性が望まれる
用途の場合には、スチレン−無水マレイン酸共重
合樹脂を用いるのが好ましい。この際スチレン−
無水マレイン酸共重合樹脂としては、無水マレイ
ン酸成分が２〜25重量％で重合度500〜4000のも
のが、発泡性や耐熱性の点で好ましい。この樹脂
は、ダイラーク（米国アルコ／ポリマーズ社の商
標名）の名称で入手可能である。なお、これらは
押出発泡性やこの発明の塩化ナトリウムの効果を
阻害しない程度の公知の添加剤が含有されていて
もよい。 Examples of the polystyrene resin of the present invention include polystyrene and a copolymer mainly composed of polystyrene, which has a light transmittance comparable to that of polystyrene. Usually, known polystyrene used for extrusion foaming is used, but in applications where adhesiveness and heat resistance of the final foam are desired, styrene-maleic anhydride Preferably, a copolymer resin is used. At this time, styrene
As the maleic anhydride copolymer resin, one having a maleic anhydride component of 2 to 25% by weight and a degree of polymerization of 500 to 4000 is preferable in terms of foamability and heat resistance. This resin is available under the name Dilarc (trade name of Alco/Polymers, USA). In addition, these may contain known additives to the extent that they do not inhibit the extrusion foamability or the effect of the sodium chloride of the present invention.
この発明の塩化ナトリウムはできるだけ乾燥し
たものを用いるのが好ましい。通常、精製食塩を
用いるのが簡便である。 It is preferable to use the sodium chloride of this invention as dry as possible. Usually, it is convenient to use purified common salt.
この発明の揮発性発泡剤としては、プロパン、
ブタン、ペンタン等の炭化水素や、メチルクロラ
イド、メチレンクロライド、ジクロルジフルオロ
メタン、ジクロロテトラフルオロエタン、モノク
ロロジフルオロメタン、トリクロロトリフルオロ
エタン、トリクロロトリフルオロメタン、ジクロ
ロモノフルオロメタン、オクタフルオロジクロロ
ブタン等のハロゲン化炭化水素系溶剤などが挙げ
られる。 The volatile blowing agents of this invention include propane,
Hydrocarbons such as butane and pentane, and halogens such as methyl chloride, methylene chloride, dichlorodifluoromethane, dichlorotetrafluoroethane, monochlorodifluoromethane, trichlorotrifluoroethane, trichlorotrifluoromethane, dichloromonofluoromethane, and octafluorodichlorobutane. Examples include hydrogenated hydrocarbon solvents.
この発明において、まずポリスチレン系樹脂と
塩化ナトリウムとが押出機内に供給される。用い
る押出機やその押出条件等はポリスチレン発泡体
を製造する公知の条件が適用される。これら両成
分の供給比率は、ポリスチレン系樹脂100重量部
に対し塩化ナトリウム0.005〜５重量部とされる。
塩化ナトリウムが0.005重量部未満では押出発泡
の際溶融樹脂中に含浸されている揮発性発泡剤を
気泡状に蒸発できず良好な発泡体が得られず、ま
た５重量部を越えると気泡が微細化し透光性が劣
ることとなり好ましくない。なお、供給するに当
つてこれら両成分を押出機ホツパーにそれぞれ所
定量供給してもよく、予め、両成分を混合した組
成物を押出機ホツパーに供給してもよい。 In this invention, first, polystyrene resin and sodium chloride are fed into an extruder. The extruder used, its extrusion conditions, etc. are the same as those known for producing polystyrene foam. The feeding ratio of these two components is 0.005 to 5 parts by weight of sodium chloride per 100 parts by weight of the polystyrene resin.
If sodium chloride is less than 0.005 parts by weight, the volatile blowing agent impregnated in the molten resin cannot be evaporated into bubbles during extrusion foaming, making it impossible to obtain a good foam, and if it exceeds 5 parts by weight, the bubbles will be fine. This is undesirable because it results in poor translucency. Incidentally, upon supplying, a predetermined amount of each of these two components may be supplied to the extruder hopper, or a composition obtained by mixing both components may be supplied to the extruder hopper in advance.
上記両成分は押出機内で加熱溶融されると共に
別に供給される揮発性発泡剤と共に混合され押出
機口金より押出される。 Both of the above components are heated and melted in an extruder, mixed together with a separately supplied volatile foaming agent, and extruded from an extruder mouthpiece.
なお、押出機に供給する揮発性発泡剤の量は通
常、ポリスチレン系樹脂100重量部に対して0.5〜
30重量部とするのが適当である。また、押出口金
としてはＴダイやフラツトダイ等を備えた種々の
ものが使用でき、例えばサーキユラーダイを備え
た口金を使用し押出直後の筒状発泡体の内面を融
着させていわゆる融着板としてもよく、板状発泡
体を目的とする場合には機械的強度の点で好まし
い。 The amount of volatile blowing agent supplied to the extruder is usually 0.5 to 100 parts by weight of polystyrene resin.
A suitable amount is 30 parts by weight. In addition, various extrusion nozzles equipped with T-dies, flat dies, etc. can be used. For example, a nozzle equipped with a circular die is used to fuse the inner surface of the cylindrical foam immediately after extrusion, forming a so-called fused plate. This is preferable in terms of mechanical strength when the purpose is to form a plate-shaped foam.
このようにして得られた発泡体は均一で平均気
泡径約0.5〜５mmの巨大な球状の気泡を有し優れ
た透光性を有するものである。該巨大気泡は主と
して独立気泡である。さらにその表面は巨大気泡
を有するにもかかわらず平滑であり、発泡倍率も
同様な揮発性発泡剤を用いた従来の方法に比して
高い。なお、この方法における巨大気泡径や発泡
倍率は、塩化ナトリウムの量比や発泡剤量比を前
記範囲内で加減することにより、所望程度に適宜
調整することができる。そしてそれにより透光性
の度合が、JIS−K6717による光線透過率の測定
において試料厚みを６mmにした全光線透過率が10
％〜70％程度の発泡体ことに発泡板を得ることが
できる。 The thus obtained foam has uniform, giant spherical cells with an average cell diameter of about 0.5 to 5 mm, and has excellent light transmittance. The giant bubbles are mainly closed cells. Furthermore, the surface is smooth despite having giant bubbles, and the foaming ratio is higher than that of conventional methods using similar volatile foaming agents. The giant bubble diameter and expansion ratio in this method can be appropriately adjusted to a desired degree by adjusting the amount ratio of sodium chloride and the amount ratio of the blowing agent within the above ranges. As a result, the degree of light transmittance is determined by the total light transmittance of 10 when the sample thickness is 6 mm in the light transmittance measurement according to JIS-K6717.
% ~ 70% foam board can be obtained.
このようにして得られた発泡体は軽量（見かけ
密度0.02〜0.4ｇ／cm3）であり採光性断熱材とし
て障子材や採光口等に好適に用いることができ
る。なお、場合によつては、採光性を必要とせず
巨大気泡で高発泡の発泡体が要求される用途にも
使用できる。 The foam thus obtained is lightweight (apparent density 0.02 to 0.4 g/cm 3 ) and can be suitably used as a light-insulating material for shoji doors, light-lighting openings, and the like. In some cases, it can also be used in applications that do not require daylighting and require a highly foamed foam with large cells.
以下、実施例及び図面によりこの発明を更に詳
しく説明する。 Hereinafter, the present invention will be explained in more detail with reference to Examples and drawings.
実施例 １
第１図に示すような押出機１を用いて押出発泡
を行なつた。まず、ポリスチレン（平均重合度
1400）100重量部と塩化ナトリウム1.0重量部とを
ホツパー２より押出機１内に供給して加熱溶融す
ると共に押出機内のスクリユー中央部に連結され
た発泡剤供給機３より発泡剤液化ブタンを該溶融
樹脂中にポリスチレン100重量部に対して５重量
部相当供給し、サーキユラーダイを備えた押出口
金４から押出して得られた円筒状発泡体６を続い
てカツター５で切り開くことにより発泡板７を作
製した。なお、押出機口径は90mmで流量は87Kg／
hr、サーキユラーダイは114mmの口径を有するス
リツト幅1.5mmのものを用いた。Example 1 Extrusion foaming was carried out using an extruder 1 as shown in FIG. First, polystyrene (average degree of polymerization
1400) 100 parts by weight and 1.0 parts by weight of sodium chloride are fed into the extruder 1 from the hopper 2 and melted by heating, and the blowing agent liquefied butane is added from the blowing agent feeder 3 connected to the center of the screw in the extruder. The cylindrical foam 6 obtained by supplying 5 parts by weight per 100 parts by weight of polystyrene into the molten resin and extruding it from the extrusion die 4 equipped with a circular die is then cut open with a cutter 5 to form a foam board 7. Created. The extruder diameter is 90mm and the flow rate is 87Kg/
hr, a circular die with a diameter of 114 mm and a slit width of 1.5 mm was used.
このようにして得られた発泡板７の性状は、厚
み６mm、幅900mm、坪量300ｇ／m2で厚み方向の平
均気泡径1.2mm、流れ方向の平均気泡径14mm、幅
方向の平均気泡径1.4mmの均一な巨大気泡を有し、
表面は平滑であり、光線透過率35％、熱伝導率λ0
＝0.033Kcal／m.h.℃の透光性の優れた断熱性発
泡板であつた。 The properties of the foam board 7 obtained in this way are: thickness 6 mm, width 900 mm, basis weight 300 g/m 2 , average cell diameter in the thickness direction 1.2 mm, average cell diameter in the flow direction 14 mm, and average cell diameter in the width direction. Has uniform giant bubbles of 1.4mm,
The surface is smooth, light transmittance is 35%, thermal conductivity is λ 0
= 0.033Kcal/mh℃ It was a heat insulating foam board with excellent translucency.
実施例 ２
実施例１と同様にして押出発泡を行なつた。ま
ず、無水マレイン酸含量８重量％のスチレン−無
水マレイン酸共重合樹脂100重量部と塩化ナトリ
ウム0.5重量部とを口径65mmの押出機に供給して
加熱溶融すると共に発泡剤供給機より発泡剤の液
化メチルクロライド５重量部相当を供給し押出量
25Kg／hrで、厚み２mm、幅100mmの間隙を有する
短形状の押出口金より押出し、出口寸法25×200
mmで長さ200mmの成形具を通すことにより、実施
例１と同様な発泡板を得た。Example 2 Extrusion foaming was carried out in the same manner as in Example 1. First, 100 parts by weight of a styrene-maleic anhydride copolymer resin containing 8% by weight of maleic anhydride and 0.5 parts by weight of sodium chloride are fed into an extruder with a diameter of 65 mm and melted by heating. Supply the equivalent of 5 parts by weight of liquefied methyl chloride to increase the extrusion amount.
Extruded at 25Kg/hr from a short extrusion die with a gap of 2mm thick and 100mm wide, outlet size 25 x 200.
A foam board similar to that of Example 1 was obtained by passing it through a molding tool having a length of 200 mm.
このようにして得られた発泡板の性状は、厚み
25mm、幅200mm、密度0.035ｇ／c.c.、厚み方向の平
均気泡径２mm、流れ方向の平均気泡径2.6mm、幅
方向の平均気泡径2.6mm、熱伝導率λ0＝
0.029Kcal／m.h.℃であり、厚み６mmにスライス
した試料の光線透過率が64％である透光性の優れ
た断熱性発泡板であつた。 The properties of the foam board obtained in this way are as follows:
25mm, width 200mm, density 0.035g/cc, average bubble diameter in the thickness direction 2mm, average bubble diameter in the flow direction 2.6mm, average bubble diameter in the width direction 2.6mm, thermal conductivity λ 0 =
It was a thermally insulating foam board with excellent light transmittance, with a light transmittance of 64% when sliced into 6 mm thick samples.
比較例
塩化ナトリウムの代りにタルク0.01重量部を用
いる以外、実施例２と同様に発泡板を得た。Comparative Example A foam board was obtained in the same manner as in Example 2, except that 0.01 part by weight of talc was used instead of sodium chloride.
このようにして得られた発泡板の性状は、厚み
25mm、幅200mm、密度0.058ｇ／c.c.、平均気泡径
（厚み方向0.3mm、流れ方向0.5mm、幅方向0.4mm）
で不均な気泡を有し、厚み６mmにスライスしたも
のの光線透過率は８〜14％で透光性が悪いもので
あつた。 The properties of the foam board obtained in this way are as follows:
25mm, width 200mm, density 0.058g/cc, average bubble diameter (thickness direction 0.3mm, flow direction 0.5mm, width direction 0.4mm)
It had uneven air bubbles and had poor light transmittance, with a light transmittance of 8 to 14% when sliced to a thickness of 6 mm.
第１図は、この発明の透光性発泡体の製造方法
に用いる装置の一例を示す説明図であり、第２図
は、この発明の透光性発泡体の一例を示す切欠斜
視図である。
１……押出機、２……ホツパー、３……発泡剤
供給機、４……押出口金、５……カツター、６…
…円筒状発泡体、７……発泡板。
FIG. 1 is an explanatory diagram showing an example of an apparatus used in the method for producing a translucent foam of the present invention, and FIG. 2 is a cutaway perspective view showing an example of the translucent foam of the present invention. . 1... Extruder, 2... Hopper, 3... Foaming agent feeder, 4... Extrusion mouthpiece, 5... Cutter, 6...
...Cylindrical foam, 7...Foam board.
Claims (1)
100重量部に対して0.005〜５重量部の塩化ナトリ
ウムを押出機内に供給して加熱溶融し、これを揮
発性発泡剤により押出発泡させることを特徴とす
る巨大気泡を有する透光性発泡体の製造方法。 ２ 揮発性発泡剤が、ポリスチレン系樹脂100重
量部に対して0.5〜30重量部用いられる特許請求
の範囲第１項記載の製造方法。[Claims] 1. Polystyrene resin and the polystyrene resin
A translucent foam having giant cells characterized by supplying 0.005 to 5 parts by weight of sodium chloride per 100 parts by weight into an extruder, heating and melting it, and extruding and foaming it with a volatile foaming agent. Production method. 2. The manufacturing method according to claim 1, wherein the volatile blowing agent is used in an amount of 0.5 to 30 parts by weight based on 100 parts by weight of the polystyrene resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57135465A JPS5924635A (en) | 1982-08-02 | 1982-08-02 | Manufacture of light-transmitting foam containing giant bubble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57135465A JPS5924635A (en) | 1982-08-02 | 1982-08-02 | Manufacture of light-transmitting foam containing giant bubble |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5924635A JPS5924635A (en) | 1984-02-08 |
| JPS6366337B2 true JPS6366337B2 (en) | 1988-12-20 |
Family
ID=15152344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57135465A Granted JPS5924635A (en) | 1982-08-02 | 1982-08-02 | Manufacture of light-transmitting foam containing giant bubble |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5924635A (en) |
-
1982
- 1982-08-02 JP JP57135465A patent/JPS5924635A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5924635A (en) | 1984-02-08 |
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