JPH06143474A - Irregular reflection sheet and production thereof - Google Patents

Irregular reflection sheet and production thereof

Info

Publication number
JPH06143474A
JPH06143474A JP4337766A JP33776692A JPH06143474A JP H06143474 A JPH06143474 A JP H06143474A JP 4337766 A JP4337766 A JP 4337766A JP 33776692 A JP33776692 A JP 33776692A JP H06143474 A JPH06143474 A JP H06143474A
Authority
JP
Japan
Prior art keywords
polyurethane foam
sheet
foam sheet
metal foil
heat
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.)
Granted
Application number
JP4337766A
Other languages
Japanese (ja)
Other versions
JP2750649B2 (en
Inventor
Mitsugi Terashi
賦 寺師
Masaharu Inoue
正春 井上
Ken Ushijima
愃 丑嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takase Dyeing and Printing Works Ltd
Original Assignee
Takase Dyeing and Printing Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Takase Dyeing and Printing Works Ltd filed Critical Takase Dyeing and Printing Works Ltd
Priority to JP4337766A priority Critical patent/JP2750649B2/en
Publication of JPH06143474A publication Critical patent/JPH06143474A/en
Priority to US08/358,986 priority patent/US5532043A/en
Application granted granted Critical
Publication of JP2750649B2 publication Critical patent/JP2750649B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25Greenhouse technology, e.g. cooling systems therefor

Abstract

PURPOSE:To provide a flexible lightweight reflective sheet having proper cushioning properties and rich in light irregular reflectivity. CONSTITUTION:Metal foil (1) is laminated to the surface of a polyurethane foam sheet (2) and a heat-shrinkable base fabric 3 is laminated to the rear thereof to form a composite sheet which is, in turn, heat-treated to shrink the fabric (3) on the rear side of the sheet (2) in longitudinal and lateral directions and the shrinking force of the base fabric (3) is allowed to act on the polyurethane foam sheet (2) and the metal foil (1) to form irregular wrinkle like unevenness (5) on the metal foil (1). The thickness of the polyurethane foam sheet is set to 1-5mm. Therefore, when this irregular reflection sheet is laid on the soil of an orchard, the sunlight is irregularly reflected to fruit not only to improve the coloration of the fruit but also to enhance the quality of the fruit and, even when the fruit is allowed to fall by sudden strong wind and rain, a state such that falling fruit is largely damaged is prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、果樹園やビニールハウ
ス等の農業用、果実の包装用等に好適な乱反射性シート
とその製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diffuse reflection sheet suitable for agriculture such as orchards and vinyl houses, and for packaging fruits, and a method for producing the diffuse reflection sheet.

【0002】[0002]

【従来の技術】栽培果実の色付きをよくし果実の品質を
高めるために、例えば実公昭57−23150号公報、
実開昭61−146147号公報等にみられるように光
反射性に優れたシートが用いられるようになった。これ
ら従来の反射性シートは、光の乱反射性をを得るべくス
リットヤーンのようなテープ状の糸条によって織成され
た基布に金属箔(アルミニウム箔)を貼り合わされて構
成されている。
2. Description of the Related Art In order to improve the coloring of cultivated fruits and enhance the quality of fruits, for example, Japanese Utility Model Publication No. 57-23150,
Sheets having excellent light reflectivity have come to be used as seen in Japanese Utility Model Publication No. 61-146147. These conventional reflective sheets are constructed by laminating a metal foil (aluminum foil) on a base cloth woven by tape-shaped yarns such as slit yarns to obtain diffuse reflection of light.

【0003】また片面に金属蒸着膜層が設けられた軟質
合成樹脂フィルムを発泡体に積層してなる反射性の保温
用シートが実開昭57−174036号公報に記載さ
れ、金属箔や金属蒸着膜の光反射性を利用した種々なシ
ートが既に知られている。
Further, a reflective heat insulating sheet formed by laminating a soft synthetic resin film having a metal vapor deposition film layer on one surface on a foam is described in Japanese Utility Model Publication No. 57-174036. Various sheets utilizing the light reflectivity of the film are already known.

【0004】[0004]

【発明が解決しようとする課題】ところが従来知られて
いる各種の反射性シートは、例えば果実の色付きをよく
する目的で使用される農業用のシートにあっては、上記
実公昭57−23150号公報記載のように基材にはス
リットヤーンのようなテープ状の糸条によって織成され
た織物や実開昭55−81031号公報にみられるよう
にフィルムが適用されているため、薄く柔軟性に富むと
いう利点があるがクッション性が殆どなく、予期せざる
強風によって果実が落下したときその果実が損傷して商
品価値の著しい低下を招くことになる。
However, various conventionally known reflective sheets are, for example, in the case of agricultural sheets used for the purpose of improving the coloring of fruits, the above-mentioned JP-B-57-23150. As described in the official gazette, as a base material, a woven fabric formed by tape-shaped yarns such as slit yarns and a film are applied as seen in Japanese Utility Model Laid-Open No. 55-81031. It has the advantage of being rich in water, but has almost no cushioning property, and when the fruit falls due to an unexpectedly strong wind, the fruit is damaged and the commercial value is significantly reduced.

【0005】この不都合は、例えば実開昭57−103
837号公報に提案されているように基材として空気マ
ットのようなクッション体を利用することにより改善す
ることができるが、かかる構造の反射性シートは極めて
高価格となり、広大な農園の敷設用としては不経済であ
り、また補修が困難であるばかりでなく敷設や格納管理
が不便となる。
This inconvenience is caused by, for example, Japanese Utility Model Laid-Open No. 57-103.
This can be improved by using a cushion body such as an air mat as a base material as proposed in Japanese Patent No. 837, but the reflective sheet having such a structure becomes extremely expensive and is used for laying a vast farm. However, not only is it uneconomical and difficult to repair, it is also inconvenient to install and store.

【0006】本発明は柔軟にして軽量であり、しかも適
度なクッション性を備え、さらに光の乱反射性に富んだ
反射性シートとその製造方法を提供するものである。
The present invention provides a reflective sheet which is flexible and lightweight, has a proper cushioning property, and is excellent in diffuse reflection of light, and a method for producing the same.

【0007】[0007]

【課題を解決するための手段】本発明は金属箔と熱収縮
性の基布との間にポリウレタンフォームシートを介装す
るとともに基布の熱収縮によって金属箔にランダムな凹
凸を形成することによって上記課題を解決した。即ち本
発明の乱反射性シートは、ポリウレタンフォームシート
の表面に金属箔が貼り合わされ、ポリウレタンフォーム
シートの裏面に熱収縮性の基布が貼り合わされてなり、
裏面の基布が熱収縮されてポリウレタンフォームシート
を介して表面の金属箔に皺条の不規則な凹凸が形成され
ていることを特徴としているものである。
According to the present invention, a polyurethane foam sheet is interposed between a metal foil and a heat-shrinkable base cloth, and heat shrinkage of the base cloth forms random irregularities on the metal foil. The above problem was solved. That is, the diffuse reflection sheet of the present invention, a metal foil is attached to the surface of the polyurethane foam sheet, a heat-shrinkable base cloth is attached to the back surface of the polyurethane foam sheet,
It is characterized in that the base cloth on the back side is heat-shrinked to form irregular wrinkles on the metal foil on the front side through the polyurethane foam sheet.

【0008】またその製造方法にあっては、ポリウレタ
ンフォームシートの一方の面にバーナーによるガス炎を
当ててその表面層を溶融し、溶融直後のその溶融面に熱
収縮性の基布または金属箔を供給して両者を加圧接着さ
せ、さらにポリウレタンフォームシートの他方の面にバ
ーナーによるガス炎を当ててその表面層を溶融するとと
もに溶融直後のその溶融面に金属箔または熱収縮性の基
布を供給して加圧接着させ、しかるのちこの複合シート
を無拘束状態で加熱処理を施して上記熱収縮性の基布を
収縮させ、この基布の収縮によりポリウレタンフォーム
シートを介して表面の金属箔に皺状の不規則な凹凸模様
を発現させることを特徴としているものである。
Further, in the manufacturing method thereof, a gas flame is applied to one surface of a polyurethane foam sheet to melt its surface layer, and a heat-shrinkable base cloth or metal foil is formed on the melted surface immediately after melting. To bond the two under pressure, and to apply a gas flame with a burner to the other surface of the polyurethane foam sheet to melt the surface layer and to immediately melt the melted surface with a metal foil or a heat-shrinkable base cloth. The composite sheet is then heat-treated in an unconstrained state to shrink the heat-shrinkable base cloth, and the shrinkage of the base cloth causes the metal on the surface to pass through the polyurethane foam sheet. It is characterized in that a wrinkle-like irregular asperity pattern is developed on the foil.

【0009】本発明に適用するポリウレタンフォームシ
ートは、厚さが1〜10mm、好ましくは厚さが2〜5
mmである。ポリウレタンフォームシートの厚さが1m
m以下においては十分なクッション性が得られず、また
厚さが10mmを超えるとコスト高となるばかりでなく
金属箔に乱反射性に富んだランダムな凹凸を形成するこ
とが困難となる。
The polyurethane foam sheet applicable to the present invention has a thickness of 1 to 10 mm, preferably 2 to 5 mm.
mm. Thickness of polyurethane foam sheet is 1m
When the thickness is less than m, sufficient cushioning properties cannot be obtained, and when the thickness exceeds 10 mm, not only the cost becomes high, but also it becomes difficult to form random irregularities rich in diffuse reflection on the metal foil.

【0010】また金属箔としては、光沢のタングステン
ランプ全反射率が80%以上、厚さが10〜20μのア
ルミニウム箔が好適である。
Further, as the metal foil, an aluminum foil having a glossy tungsten lamp total reflectance of 80% or more and a thickness of 10 to 20 μ is suitable.

【0011】また上記ポリウレタンフォームシート裏面
に貼り合わせる熱収縮性の基布としては、ポリウレタン
フォームシートの融点以下の温度で縦横方向に5〜30
%程度収縮する織編物や合成樹脂シートが適用できる
が、比較的低温で収縮する繊維、例えばアクリル繊維や
ポリプロピレン繊維の紡績糸で織成された粗目織物が軽
くて柔軟性に富みかつ安価であることから好ましく適用
できる。
The heat-shrinkable base fabric to be attached to the back surface of the polyurethane foam sheet is 5 to 30 in the length and width directions at a temperature below the melting point of the polyurethane foam sheet.
Although a woven or knitted fabric or synthetic resin sheet that shrinks by about 100% can be applied, a coarse woven fabric woven with a fiber that shrinks at a relatively low temperature, for example, a spun yarn of acrylic fiber or polypropylene fiber is light, flexible, and inexpensive. Therefore, it can be preferably applied.

【0012】そのうえポリウレタンフォームシートは加
熱してその表面を溶融させると接着剤と同等の接着能を
発揮し、したがって上記基布や金属箔を接着剤を用いる
ことなく高速度で接着することができ、金属箔/ポリウ
レタンフォームシート/基布からなる3層構造の複合シ
ートを能率よく製造することができる。
In addition, the polyurethane foam sheet, when heated to melt its surface, exhibits an adhesive ability equivalent to that of an adhesive, so that the above-mentioned base cloth or metal foil can be adhered at a high speed without using an adhesive. It is possible to efficiently manufacture a composite sheet having a three-layer structure of metal foil / polyurethane foam sheet / base cloth.

【0013】[0013]

【作用】本発明の乱反射性シートを、例えば農業用とし
て果樹園の樹の下に敷設して使用すると、表面の金属箔
は太陽光線をランダムな方向に反射させて日陰部分の果
実の色付きをよくし、果実の成育を助長する。そして中
間層のポリウレタンフォームシートは土壌の温度上昇や
乾燥を防止するとともに、強風等によって落下する果実
の衝撃を緩和して損傷の度合いを小さくし、落下果実の
品質低下を抑制する。
When the diffuse reflection sheet of the present invention is laid under a tree in an orchard for use in agriculture, for example, the metal foil on the surface reflects sun rays in random directions to cause the shaded fruits to be colored. Well, promote fruit growth. The polyurethane foam sheet in the middle layer prevents the temperature of the soil from rising and drying, reduces the impact of the falling fruits due to strong winds, etc. to reduce the degree of damage and suppress the deterioration of the quality of the falling fruits.

【0014】また熱収縮性の基布はその熱収縮により、
金属箔にエンボスロールのように押圧力を加えることな
くまた金属箔の光沢を害することなく不規則な凹凸模様
を発現させる。そして熱収縮後はボリウレタンフォーム
シートの補強作用を奏する。さらにポリウレタンフォー
ムシートの表裏面は加熱により接着能を発揮して金属箔
並びに熱収縮性基布を強力に接合させる。
The heat-shrinkable base cloth is
The irregular uneven pattern is developed on the metal foil without applying a pressing force like the embossing roll and without damaging the gloss of the metal foil. After the heat shrinkage, the polyurethane foam sheet has a reinforcing effect. Furthermore, the front and back surfaces of the polyurethane foam sheet exert an adhesive ability by heating to strongly bond the metal foil and the heat-shrinkable base cloth.

【0015】[0015]

【実施例】以下本発明の実施例を示した図にもとづいて
説明すると、図1は本発明の乱反射性シートの断面図を
示し、(1)は金属箔、(2)はポリウレタンフォーム
シート、そして(3)は熱収縮性基布であって、金属箔
(1)には厚さ13μのアルミニウム箔、ポリウレタン
フォームシート(2)には厚さが2mm、比重が0.0
20の熱融着可能な軟質ポリウレタンフォームシート、
そして熱収縮性基布としてアクリル繊維の紡績糸(綿番
手14)を経糸および緯糸に配し、経糸密度、緯糸密
度がそれぞれ17本/インチの粗目平織物を使用してい
る。
EXAMPLE An explanation will be given below with reference to the drawings showing examples of the present invention. FIG. 1 shows a sectional view of the diffuse reflection sheet of the present invention, (1) is a metal foil, (2) is a polyurethane foam sheet, And (3) is a heat-shrinkable base cloth, the metal foil (1) has a thickness of 13 μ aluminum foil, the polyurethane foam sheet (2) has a thickness of 2 mm and a specific gravity of 0.0.
20 heat-sealable flexible polyurethane foam sheets,
Acrylic spun yarn (cotton count 14 S ) is arranged on the warp and weft as a heat-shrinkable base fabric, and a coarse plain weave having a warp density and a weft density of 17 yarns / inch is used.

【0016】本発明の乱反射性シート(4)は図1に示
しているように、ポリウレタンフォームシート(2)の
表面に金属箔(1)が貼り合わされ、ポリウレタンフォ
ームシート(2)の裏面に熱収縮性の基布(3)が貼り
合わされて構成され、基布(3)が熱収縮されてポリウ
レタンフォームシート(2)を介して表側の金属箔
(1)の面に皺条の不規則な凹凸(5)が形成されてな
る。
As shown in FIG. 1, the diffuse reflection sheet (4) of the present invention has a metal foil (1) bonded to the surface of a polyurethane foam sheet (2), and a heat is applied to the back surface of the polyurethane foam sheet (2). A shrinkable base cloth (3) is laminated and formed, and the base cloth (3) is heat-shrinked to form an irregular wrinkle on the surface of the metal foil (1) on the front side through the polyurethane foam sheet (2). The unevenness (5) is formed.

【0017】続いて上記のように表面の金属箔(1)に
皺条の不規則な凹凸(5)が形成され、中間層にポリウ
レタンフォームシート(2)、裏面に基布(3)を備え
た乱反射性のシート(4)の製造方法を示している図2
〜図4について説明すると、ロール状に巻き取られたポ
リウレタンフォームシート(2)を引き出し、シーベル
テンション装置(10)によってポリウレタンフォーム
シート(2)が弛緩しない程度張力を調整しながら周速
40m/分にて回転しているメインロール(11)上に
導き、このメインロール(11)においてポリウレタン
フォームシート(2)の一方の面にガスバーナー(1
2)により炎を吹き付け、ポリウレタンフォームシート
(2)の表面を厚さ0.4〜0.6mm程度溶融して接
着能を発現させる。他方ガイドロール(13)(13)
を通して上記熱収縮性の基布(3)を引き出して上記メ
インロール(11)の周面に対設してガスバーナー(1
2)の下方に位置しているプレッシャーロール(14)
に導入してポリウレタンフォームシート(2)の溶融状
態にある表面側に供給し、プレッシャーロール(14)
の加圧作用により両者(2)(3)を接着したのちクー
リングロール(15)によって冷却し、この複合シート
(20)を一旦ロール状に巻き取る。この時点において
は基布(3)には殆ど熱収縮が生じていない。
Subsequently, as described above, the wrinkle-shaped irregularities (5) are formed on the metal foil (1) on the surface, the polyurethane foam sheet (2) is provided on the intermediate layer, and the base fabric (3) is provided on the back surface. FIG. 2 showing a method of manufacturing a diffusely reflective sheet (4).
4 will be explained. With reference to FIG. 4, the polyurethane foam sheet (2) wound into a roll is pulled out, and the peripheral speed is 40 m / min while adjusting the tension so that the polyurethane foam sheet (2) does not relax by the sebel tension device (10). It is guided on the main roll (11) which is rotating by the gas burner (1) on one surface of the polyurethane foam sheet (2) in this main roll (11).
A flame is blown by 2), and the surface of the polyurethane foam sheet (2) is melted to a thickness of 0.4 to 0.6 mm to develop an adhesive ability. On the other hand, guide rolls (13) (13)
The heat-shrinkable base fabric (3) is drawn out through the main roll (11) to face the peripheral surface of the gas roll (1).
Pressure roll (14) located below 2)
Is supplied to the melted surface side of the polyurethane foam sheet (2), and the pressure roll (14)
After the two (2) and (3) are adhered to each other by the pressure action of (3), they are cooled by the cooling roll (15) and the composite sheet (20) is once wound into a roll. At this point, the base fabric (3) has hardly undergone heat shrinkage.

【0018】続いてこの複合シート(20)を図3に示
したように上記と同様に、メインロール(11)、ガス
バーナー(12)、プレッシャーロール(14)、クー
リングロール(15)を備えた装置に、そのポリウレタ
ンフォームシート(2)の面を表側として弛緩しない程
度の張力に調整しながら供給して上記と同様にポリウレ
タンフォームシート(2)の面にガスバーナー(12)
により炎を吹き付け、ポリウレタンフォームシート
(2)の表面を軽く溶融し、その溶融面に金属箔(1)
を導入してポリウレタンフォームシート(2)に接着
し、ポリウレタンフォームシート(2)の表面に金属箔
(1)、裏面に基布(3)が接着された3層の複合シー
ト(30)となし、冷却したのちロール状に巻き取る。
Subsequently, as shown in FIG. 3, the composite sheet (20) was provided with a main roll (11), a gas burner (12), a pressure roll (14) and a cooling roll (15) as described above. The polyurethane foam sheet (2) is supplied to the apparatus while adjusting the tension so that the surface of the polyurethane foam sheet (2) is not loosened and the gas burner (12) is applied to the surface of the polyurethane foam sheet (2) in the same manner as above.
A flame is blown by to lightly melt the surface of the polyurethane foam sheet (2), and the metal foil (1) is applied to the melted surface.
And then bonded to a polyurethane foam sheet (2) to form a three-layer composite sheet (30) in which a metal foil (1) is bonded to the front surface of the polyurethane foam sheet (2) and a base cloth (3) is bonded to the back surface. After cooling, wind it into a roll.

【0019】しかるのちこの3層構造の複合シート(3
0)を図4に示しているように、加熱ゾーン(21)と
冷却ゾーン(22)を備えた熱処理装置に収縮を拘束し
ない状態で導入する。即ち、複合シート(30)をフィ
ードロール(23)にて強制的に弛緩状態となして熱処
理装置内に供給し、加熱ゾーン(21)で上記基布
(3)を縦方向および横方向にも収縮させたのち冷却し
て巻き取った。
Then, the composite sheet (3
0) is introduced into a heat treatment apparatus having a heating zone (21) and a cooling zone (22) as shown in FIG. That is, the composite sheet (30) is forcibly made into a relaxed state by the feed roll (23) and supplied into the heat treatment apparatus, and the base fabric (3) is also vertically and horizontally fed in the heating zone (21). After shrinking, it was cooled and wound up.

【0020】かくして熱処理した複合シート(30)
は、基布(3)が縦横共に約8%収縮し、この基布
(3)の収縮がポリウレタンフォームシート(2)と金
属箔(1)に波及して裏側の基布(3)側が平坦面であ
るにも拘らず表側の金属箔(1)には図1のように高低
差が約1〜2mmの皺状の不規則な凹凸(5)が発現し
た乱反射性シート(4)が得られた。しかもこの凹凸
(5)はその凸部においても凹部においてもポリウレタ
ンフォームシート(2)に強固に接着され、凹凸(5)
の耐久性に富みまた凹凸(5)のすべての部分において
クッション性を有している。
The composite sheet (30) thus heat-treated
The base cloth (3) contracts about 8% both vertically and horizontally, and the contraction of the base cloth (3) spreads to the polyurethane foam sheet (2) and the metal foil (1), and the back side base cloth (3) side is flat. Although it is a surface, a diffused reflection sheet (4) having wrinkle-like irregular unevenness (5) having a height difference of about 1 to 2 mm is obtained on the front side metal foil (1) as shown in FIG. Was given. Moreover, the unevenness (5) is firmly adhered to the polyurethane foam sheet (2) at both the convex portion and the concave portion, and the unevenness (5)
Cushioning is provided in all parts of the unevenness (5) which is highly durable.

【0021】ちなみに本発明方法によって得られた乱反
射性シート(4)の凹凸(5)の耐久性を、洗濯法によ
りテストしたところ次の通りであった。 1) JIS−L−027.103にもとづく洗濯テス
ト 回数 5回────等級 5級 2) 商業洗濯(塩素系ドライクリーニング)テスト 回数 1回────等級 4級 3) 商業洗濯(石油系ドライクリーニング)テスト 回数 1回────等級 4級 (上記はいずれもオリジナル外観比を5段階評価の等級
である。)
By the way, the durability of the irregularities (5) of the diffuse reflection sheet (4) obtained by the method of the present invention was tested by a washing method, and the results were as follows. 1) Washing test based on JIS-L-027.103 5 times ─── Grade 5 grade 2) Commercial washing (chlorine dry cleaning) test 1 time ──── Grade 4 3) Commercial washing (petroleum) System dry cleaning) Number of tests 1 time Grade 4 (All of the above are grades with an original appearance ratio of 5 grades.)

【0022】なお上記実施例においては、3層構造の複
合シート(30)を、第1段階の工程でポリウレタンフ
ォームシート(2)と基布(3)とを貼り合わせ、次い
で第2段階において金属箔(1)を貼り合わせて製造す
る手順を述べているが、第1段階でポリウレタンフォー
ムシート(2)と金属箔(1)とを貼り合わせ、第2段
階で基布(3)を貼り合わせても本発明を満足すること
は勿論であり、また第1段階で得られた2層構造の複合
シート(20)を巻き取ることなく走行させ、その走行
中に金属箔(1)または基布(3)を貼り合わせてもよ
い。
In the above embodiment, the composite sheet (30) having a three-layer structure is laminated with the polyurethane foam sheet (2) and the base cloth (3) in the first step, and then the metal sheet is mixed in the second step. The procedure for producing by laminating the foil (1) is described. The polyurethane foam sheet (2) and the metal foil (1) are attached in the first step, and the base fabric (3) is attached in the second step. However, it goes without saying that the present invention is satisfied, and the composite sheet (20) having a two-layer structure obtained in the first step is allowed to run without winding, and the metal foil (1) or the base cloth is fed during the running. You may stick together (3).

【0023】[0023]

【発明の効果】このように本発明の光乱反射性シート
(4)は、ポリウレタンフォームシート(2)の表面に
金属箔(1)が貼り合わされ、ポリウレタンフォームシ
ート(2)の裏面に熱収縮性の基布(3)が貼り合わさ
れて構成され、基布(3)が熱収縮されて表面の金属箔
(1)に皺条の不規則な凹凸(5)が形成されてなるも
のであから、この反射性シートを例えば農業用として果
樹園の樹の下に金属箔(1)側を表面として敷設使用す
ると、従来のこの種の反射性シートと同様に果実に向か
って太陽光線を乱反射させ、栽培果実の色付きをよくし
果実の品質を高め、あるいは土壌の水分の蒸散や雑草の
抑制に役立つばかりでなく、クッション性をゆうしてい
るから台風などの不意の強風雨により果実が落下して
も、落下果実が大きく損傷するという事態を防止すると
いう優れた効果を奏する。
As described above, in the diffused reflection sheet (4) of the present invention, the metal foil (1) is attached to the surface of the polyurethane foam sheet (2), and the heat shrinkability is applied to the back surface of the polyurethane foam sheet (2). 1. The base cloth (3) is laminated and formed, and the base cloth (3) is heat-shrinked to form irregular wrinkles (5) on the surface of the metal foil (1). , When this reflective sheet is laid and used, for example, under a tree in an orchard for agricultural purposes with the metal foil (1) side as the surface, it causes the sun's rays to be diffusely reflected toward the fruit like a conventional reflective sheet of this kind. Not only does it improve the coloring of the cultivated fruits and improve the quality of the fruits, but also helps prevent the evaporation of moisture in the soil and the control of weeds. But the falling fruit is big An excellent effect of preventing the situation that wound.

【0024】さらにポリウレタンフォームシート(2)
と基布(3)とからなる基材部が柔軟軽量であるため、
取り扱いが容易であり、農業ハウスの内張りや保温を要
する果実の包装用としても都合よく利用することができ
る。
Polyurethane foam sheet (2)
Since the base material part including the base cloth (3) is flexible and lightweight,
It is easy to handle and can be conveniently used as a lining for agricultural houses and for packaging fruits that require heat retention.

【0025】また本発明の製造わうわうにおいては、金
属箔(1)、ポリウレタンフォームシート(2)および
基布(3)とからなる3層構造の複合シート(30)
は、接着剤を使用することなくポリウレタンフォームシ
ート(2)の接着能を利用して貼り合わされるから、そ
の生産性が高く、優れた光の乱反射性とクッション性を
備えた反射性シートを安価に提供することができる。
In the production process of the present invention, a composite sheet (30) having a three-layer structure comprising a metal foil (1), a polyurethane foam sheet (2) and a base fabric (3).
Is bonded using the adhesiveness of the polyurethane foam sheet (2) without the use of an adhesive, so its productivity is high, and a reflective sheet with excellent diffuse reflection and cushioning properties is inexpensive. Can be provided to.

【0026】また中間層のポリウレタンフォームシート
(2)として連続気泡性のものを使用し、多数の小孔を
穿設して農園用に供すると、降雨を土壌中に進入させる
ことができるとともに降雨の一部がポリウレタンフォー
ムシートに保留され、土壌の乾燥防止に寄与する。また
上記ポリウレタンフォームシート(2)として独立気泡
性のものを使用すれば保温性が向上し、土壌温度や農業
用ハウス内温度の急激な変動を防止して農作物の成育を
助成効果を発揮する。
When the polyurethane foam sheet (2) for the intermediate layer is made of open-celled one and has a large number of small holes and is provided for plantation, the rainfall can be introduced into the soil and at the same time. A part of it is retained in the polyurethane foam sheet, which helps prevent soil from drying. Further, if the polyurethane foam sheet (2) having a closed cell structure is used, the heat retaining property is improved, and a rapid change in soil temperature or temperature in the agricultural greenhouse is prevented to exert the effect of promoting the growth of agricultural products.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の乱反射性シートの厚さ方向の断面図で
ある。
FIG. 1 is a cross-sectional view in the thickness direction of a diffuse reflection sheet of the present invention.

【図2】製造方法の第1段階を例示した説明図である。FIG. 2 is an explanatory view illustrating the first stage of the manufacturing method.

【図3】製造方法の第2段階を例示した説明図である。FIG. 3 is an explanatory view illustrating the second stage of the manufacturing method.

【図4】熱処理工程を略示した説明図である。FIG. 4 is an explanatory view schematically showing a heat treatment process.

【符号の説明】[Explanation of symbols]

1.金属箔 2.ポリウレタンフォームシート 3.基布 4.乱反射性シート 5.凹凸 1. Metal foil 2. Polyurethane foam sheet 3. Base cloth 4. Diffuse reflective sheet 5. Unevenness

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 B32B 15/08 T 27/12 7258−4F 27/40 7016−4F ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B32B 15/08 T 27/12 7258-4F 27/40 7016-4F

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 ポリウレタンフォームシートの表面に金
属箔が貼り合わされ、ポリウレタンフォームシートの裏
面に熱収縮性の基布が貼り合わされてなり、裏面の基布
が熱収縮されて表面の金属箔にポリウレタンフォームシ
ートを介して皺条の不規則な凹凸が形成されていること
を特徴とする乱反射性シート。
1. A polyurethane foam sheet having a surface on which a metal foil is attached, and a polyurethane foam sheet having a back surface on which a heat-shrinkable base cloth is attached. An irregular reflection sheet having irregular wrinkles formed through a foam sheet.
【請求項2】 上記ポリウレタンフォームシートの厚さ
が1〜5mmである請求項1記載の乱反射性シート。
2. The diffuse reflection sheet according to claim 1, wherein the polyurethane foam sheet has a thickness of 1 to 5 mm.
【請求項3】 ポリウレタンフォームシートの一方の面
にバーナーによるガス炎を当ててその表面層を溶融し、
溶融直後のその溶融面に熱収縮性の基布または金属箔を
供給して両者を加圧接着させ、さらにポリウレタンフォ
ームシートの他方の面にバーナーによるガス炎を当てて
その表面層を溶融するとともに溶融直後のその溶融面に
金属箔または基布を供給して加圧接着させ、しかるのち
この3層構造の複合シートを無拘束状態で熱処理を施し
て上記熱収縮性の基布を収縮させ、この基布の収縮によ
りポリウレタンフォームシートを介して表面の金属箔に
皺状の不規則な凹凸模様を発現させることを特徴とする
乱反射性シートの製造方法。
3. A surface of a polyurethane foam sheet is melted by applying a gas flame with a burner to one surface of the polyurethane foam sheet,
Immediately after melting, a heat-shrinkable base cloth or metal foil is supplied to the melted surface to bond the two under pressure, and a gas flame is applied to the other surface of the polyurethane foam sheet by a burner to melt the surface layer. Immediately after melting, a metal foil or a base cloth is supplied to the melted surface and pressure-bonded, and then the composite sheet having the three-layer structure is heat-treated in an unrestrained state to shrink the heat-shrinkable base cloth, A method for producing a diffuse reflection sheet, characterized in that a wrinkle-like irregular asperity pattern is developed on a surface metal foil through a polyurethane foam sheet by contraction of the base cloth.
JP4337766A 1992-11-04 1992-11-04 Diffuse-reflective sheet and manufacturing method thereof Expired - Fee Related JP2750649B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4337766A JP2750649B2 (en) 1992-11-04 1992-11-04 Diffuse-reflective sheet and manufacturing method thereof
US08/358,986 US5532043A (en) 1992-11-04 1994-12-19 Photoreflective sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4337766A JP2750649B2 (en) 1992-11-04 1992-11-04 Diffuse-reflective sheet and manufacturing method thereof

Publications (2)

Publication Number Publication Date
JPH06143474A true JPH06143474A (en) 1994-05-24
JP2750649B2 JP2750649B2 (en) 1998-05-13

Family

ID=18311766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4337766A Expired - Fee Related JP2750649B2 (en) 1992-11-04 1992-11-04 Diffuse-reflective sheet and manufacturing method thereof

Country Status (1)

Country Link
JP (1) JP2750649B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038297A1 (en) * 1995-06-01 1996-12-05 Termonova Oy Sandwich construction
JP2010115193A (en) * 2008-10-15 2010-05-27 Tokyo Univ Of Science Cultivation method for agricultural crop using fluorescence radiation material, and material to be used for the same
JP2012096545A (en) * 2006-05-10 2012-05-24 Oji Paper Co Ltd Method of manufacturing uneven pattern-forming sheet, and method of manufacturing optical element
JP2014104657A (en) * 2012-11-27 2014-06-09 Daio Kakoshi Kogyo Kk Diffuse reflection sheet and method for producing the same
JP2014226121A (en) * 2013-05-27 2014-12-08 昭和電工株式会社 Plant cultivation apparatus
JP2015058293A (en) * 2013-09-20 2015-03-30 帝国繊維株式会社 Shape-retaining hose for fire hydrant with reflectivity/luminous property

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038297A1 (en) * 1995-06-01 1996-12-05 Termonova Oy Sandwich construction
JP2012096545A (en) * 2006-05-10 2012-05-24 Oji Paper Co Ltd Method of manufacturing uneven pattern-forming sheet, and method of manufacturing optical element
US8896923B2 (en) 2006-05-10 2014-11-25 Oji Holdings Corporation Corrugated pattern forming sheet, and methods for manufacturing antireflector, retardation plate, original process sheet plate, and optical element
JP2010115193A (en) * 2008-10-15 2010-05-27 Tokyo Univ Of Science Cultivation method for agricultural crop using fluorescence radiation material, and material to be used for the same
JP2014104657A (en) * 2012-11-27 2014-06-09 Daio Kakoshi Kogyo Kk Diffuse reflection sheet and method for producing the same
JP2014226121A (en) * 2013-05-27 2014-12-08 昭和電工株式会社 Plant cultivation apparatus
JP2015058293A (en) * 2013-09-20 2015-03-30 帝国繊維株式会社 Shape-retaining hose for fire hydrant with reflectivity/luminous property

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