JP2001009857A - Manufacture of plastic foam composite - Google Patents
Manufacture of plastic foam compositeInfo
- Publication number
- JP2001009857A JP2001009857A JP11221551A JP22155199A JP2001009857A JP 2001009857 A JP2001009857 A JP 2001009857A JP 11221551 A JP11221551 A JP 11221551A JP 22155199 A JP22155199 A JP 22155199A JP 2001009857 A JP2001009857 A JP 2001009857A
- Authority
- JP
- Japan
- Prior art keywords
- skin
- mold
- foam
- foamed
- composite
- 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
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/20—Making multilayered or multicoloured articles
- B29C43/203—Making multilayered articles
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
- B29K2105/043—Skinned foam
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【0001】本発明はプラスチック粉末又は細粒と、該
粉末の粒子又は該細粒より大きい架橋発泡性の粒状体と
を金型に入れ、金型内の材料に遠心力を与えないよう
に、回転しながら外部より加熱して、金型の内面に粉末
プラスチックを溶融させて表皮とし、その上に発泡性粒
状体を付着させ、金型の温度,表皮の温度を発泡剤の分
解温度にして発泡剤を分解させて、架橋発泡体で金型を
充填させてコアとし、次いで冷却する事を特徴とするプ
ラスチックの表皮で発泡体の全面を覆った発泡複合体の
製造方法である。[0001] The present invention relates to a method of placing plastic powder or fine granules and particles of the powder or crosslinked expandable granules larger than the fine granules in a mold so as not to apply a centrifugal force to the material in the mold. Heat from the outside while rotating, melt the powdered plastic on the inner surface of the mold to form a skin, and attach expandable granules on it, and set the mold temperature and the skin temperature to the decomposition temperature of the foaming agent. This is a method for producing a foamed composite in which a foaming agent is decomposed, a mold is filled with a crosslinked foam to form a core, and then the core is cooled, and the entire surface of the foam is covered with a plastic skin.
【0002】[発明の属する技術の分野]断熱材,建
材,クッション材,浮揚材。[Field of the Invention] Heat insulating materials, building materials, cushion materials, and floating materials.
【0003】[従来の技術]プラスチックの発泡体は、
極めて小さい気泡とこれを取り巻く気泡膜で成り、気体
の占める体積分率が高く対流が少ないので、安価で断熱
性に優れ又クッション性,浮揚性も良好で各方面で大量
に用いられている。発泡体は、このような特徴を持つ半
面、強度が低いため単独では使いにくく、又吸湿して断
熱性が低下し、時間の経過で収縮する欠点があり、これ
らの欠点の改良が強く望まれている。[Prior Art] Plastic foams are:
It is composed of extremely small bubbles and a bubble film surrounding the bubbles, and has a high volume fraction of gas and low convection. Therefore, it is inexpensive, has excellent heat insulating properties, has good cushioning and buoyancy, and is widely used in various fields. On the other hand, foams have such characteristics, but have low strength and are difficult to use alone, and also have the drawback that they absorb moisture, reduce heat insulation, and shrink over time. Improvement of these drawbacks is strongly desired. ing.
【0004】これ等の欠点を改良するためプラスチック
発泡体の表面にプラスチックの厚い表皮を設ける事が行
なわれている。その技術の一つは回転成形で表皮を造
り、そ,の中にポリウレタンを注入発泡させる方法であ
る。これによって、プラスチック発泡体の強度と耐吸湿
性は改善されるが、この方法は二工程で二種類の金型が
必要でコストが高く且つ表皮とコアとの接着が不十分
で、耐衝撃性,曲げ強度が十分でない。他の一つはブロ
ー成形で表皮を造り、その中に予備発泡体を入れ、これ
を加熱して一体化するもので、この方法は三工程でコス
トが高く、予備発泡体の加熱一体化を高温で行なう事が
出来ないので、表皮とコアとの接着が十分でなく耐衝撃
性,曲げ強度が良好でない。In order to remedy these drawbacks, a plastic foam is provided with a thick skin on the surface of the plastic foam. One of the techniques is a method in which a skin is formed by rotational molding, and polyurethane is injected and foamed therein. This improves the strength and moisture absorption of the plastic foam, but this method requires two molds in two steps, is costly, has insufficient adhesion between the skin and the core, and has a high impact resistance. , Bending strength is not enough. The other is to make the skin by blow molding, put the pre-foam into it, heat it and integrate it, and this method is expensive in three steps, and the heating and integration of the pre-foam is Since it cannot be performed at a high temperature, the adhesion between the skin and the core is not sufficient, and the impact resistance and bending strength are not good.
【0005】プラスチックの粉末と発泡性の粒状体とを
金型に同時に入れ、これを回転成形して表皮と発泡体と
で成る発泡複合体を造る技術がある。この方法は一工程
で成形体を製造できてコストが安く、金型内で表皮とコ
アを同時に造るので、両者の接着が良好で耐衝撃性,曲
げ強度に優れる。この技術は発明者の一人が約30年前
に発見したもので、usp3.814.778、usp
3.914.361に記されている。この技術は二種類
の材料を同時に金型に入れ、表皮とコアを同時に成形
し、又コアは金型の中で架橋と発泡とを行ない、金型の
形状通りに成形するので成形が難しく、30年経った今
でも工場生産されるに至っていない。この技術は表皮と
コアとの完全な分離が難しく、表皮の厚さが不均一に成
りやすく、表皮にピンホール、コアにボイドや歪みが発
生し、金型の形状通りの成形体に成りにくい。[0005] There is a technique in which a plastic powder and an expandable granular material are simultaneously placed in a mold, and the resulting mixture is rotationally molded to produce a foam composite comprising a skin and a foam. According to this method, the molded body can be manufactured in one step and the cost is low. Since the skin and the core are simultaneously formed in the mold, the adhesion between the two is good, and the impact resistance and the bending strength are excellent. This technique was discovered about 30 years ago by one of the inventors, and it was found that usp 3.814.778, usp
3.914.361. In this technology, two kinds of materials are put in a mold at the same time, the skin and the core are molded at the same time, and the core is crosslinked and foamed in the mold, and it is difficult to mold because it is molded according to the shape of the mold, Even after 30 years, it has not yet been produced in a factory. With this technology, it is difficult to completely separate the skin and the core, the thickness of the skin tends to be uneven, pinholes in the skin, voids and distortions in the core, and it is difficult to form a molded product according to the shape of the mold .
【0006】[発明が解決しようとする課題]本発明は
軽量で強度があり、断熱性,クッション性に優れ、長年
月使用しても吸湿して断熱性が低下する事がなく、時間
の経過で変形しない表皮と発泡体とで成る発泡複合体
を、容易且つ確実に得る事が出来る製造技術を確立しよ
うとするものである。[Problems to be Solved by the Invention] The present invention is lightweight, strong, and excellent in heat insulation and cushioning properties. It is an object of the present invention to establish a production technique capable of easily and surely obtaining a foam composite comprising a skin and a foam which does not deform.
【0007】[発明の実施の形態]発明者はこの技術に
就いて長年研究を重ねて本発明に至ったものである。本
発明は粉末プラスチックとこれより形の大きい架橋発泡
性の粒状体とを金型に入れ、この材料に遠心力を与えな
いようにゆっくり回転しながら外部より加熱する。これ
により、先ず粒径の小さい粉末プラスチックが金型の内
面に付着して均一な厚さの表皮となり、次いでこの表皮
の上に発泡性粒状体が均一に分布付着し、更に加熱され
て金型の温度,次いで表皮の温度が発泡剤の分解温度に
なると、架橋発泡性粒状体が発泡して多面体気泡の発泡
材となり金型を充填して、発泡複合体となるものであ
る。即ち、本発明はポリオレフインの架橋発泡体の気泡
が、発泡剤の分解温度で安定である事と、小さい粒子と
大きい粒子とを回転することで、表皮と発泡相とに分け
られる事を利用して、表皮のある発泡複合体を一工程で
造る技術である。[Embodiment of the Invention] The inventor of the present invention has conducted research on this technology for many years and has arrived at the present invention. According to the present invention, powdered plastic and larger crosslinked foamable granules are placed in a mold, and the material is heated from the outside while being slowly rotated so as not to give a centrifugal force to the material. As a result, first, powdered plastic having a small particle size adheres to the inner surface of the mold to form a skin having a uniform thickness, and then expandable granules are uniformly distributed and adhered on the skin, and further heated to mold. When the temperature of the skin and then the temperature of the skin reach the decomposition temperature of the foaming agent, the crosslinked foamable foam expands to become a foaming material of polyhedral cells, and the mold is filled to form a foamed composite. That is, the present invention utilizes the fact that the cells of the crosslinked polyolefin foam are stable at the decomposition temperature of the blowing agent, and that the particles are separated into the epidermis and the foaming phase by rotating small particles and large particles. This is a technique for producing a foamed composite with a skin in one step.
【0008】本発明は粉末プラスチックと、これより形
の大きい発泡性粒状体とを厚肉の金型に入れ、均一な温
度を保ちながら、これをゆっくり回転しながら加熱する
事により粉末プラスチックを均一な厚さの表皮とし、次
いで、この上に形の大きい架橋発泡性粒状体が一層に並
んで、且つ均等に分布付着させる。次いで金型の内側に
ある表皮の温度が上がり発泡剤の分解温度になると、発
泡性粒状体には多量の分解発熱性の発泡剤が配合されて
いるので、夫々の粒状体は金型に接している部分から発
泡して、発泡性粒状体が金型内に均等に分布しているの
で、金型の内壁から金型の中央に向かって相似形を保ち
ながら一斉に膨張する。発泡剤の分解によって発熱する
が、発泡剤は大量のポリオレフイン中に均一に分散して
いるので、発泡体の温度は発泡剤の分解温度付近の温度
に留まり、且つ、発泡体の動く距離が、金型の内面から
金型の中央へと比較的短いので、コアにはボイドも歪み
も発生せず、均一微細な気泡の発泡体になる。従って、
断熱性に優れた第1図の様な発泡複合体で軽量で強度が
あり、金型通りの形で、時間の経過で収縮しない成形体
になる。According to the present invention, the powdered plastic and the foamable granules having a larger size are placed in a thick mold, and the powdered plastic is uniformly heated by slowly rotating it while maintaining a uniform temperature. A skin having a large thickness is formed, and large crosslinked expandable granules having a large shape are deposited on the skin in a single layer and uniformly distributed. Next, when the temperature of the skin inside the mold rises and reaches the decomposition temperature of the foaming agent, since a large amount of the decomposing and exothermic foaming agent is added to the foamable granules, each granule comes into contact with the mold. Since the foamable particles are uniformly distributed in the mold, the foam expands simultaneously while maintaining a similar shape from the inner wall of the mold toward the center of the mold. Although heat is generated by the decomposition of the foaming agent, since the foaming agent is uniformly dispersed in a large amount of polyolefin, the temperature of the foam remains at a temperature near the decomposition temperature of the foaming agent, and the moving distance of the foam is Since the core is relatively short from the inner surface of the mold to the center of the mold, the core is free from voids and distortion, and the foam is a uniform and fine cell foam. Therefore,
A foamed composite as shown in FIG. 1 having excellent heat insulation properties, it is lightweight and strong, and becomes a molded body that does not shrink over time in the shape of a mold.
【0009】本発明の表皮用材料はポリオレフイン,ナ
イロン,ABS等の熱可塑性樹脂の粉末か、熱硬化性樹
脂の半硬化の粉末である。好ましいのは、吸湿の少ない
点からポリオレフインで、更に好ましくは高密度ポリエ
チレンである。高密度ポリエチレンは本願の発泡体との
接着性が特に良好である。本発明の表皮は、その厚さが
0.25mm以上のもので、0.25mmに達しない表
皮は強度が無く、湿気を通して断熱層を吸湿させ断熱性
が低下する。表皮用の粉末は球形である事が好ましく、
粉砕した髭のある材料は成形性が悪い。表皮の厚さは好
ましくは0.5mm以上であり、更に好ましくは1.0
mm以上である。そして7mmより厚い表皮は、この表
皮層を通って熱が逃散するので成形体の断熱性が悪くな
り、且つ衝撃で壊れやすい。The skin material of the present invention is a powder of a thermoplastic resin such as polyolefin, nylon, ABS or the like, or a semi-cured powder of a thermosetting resin. Preferred is polyolefin because of low moisture absorption, and more preferred is high density polyethylene. High density polyethylene has particularly good adhesion to the foam of the present application. The skin of the present invention has a thickness of 0.25 mm or more, and a skin not reaching 0.25 mm has no strength, and absorbs the heat insulating layer through moisture to lower the heat insulating property. The powder for the epidermis is preferably spherical,
Crushed bearded materials have poor formability. The thickness of the skin is preferably 0.5 mm or more, more preferably 1.0 mm or more.
mm or more. In the case of a skin having a thickness of more than 7 mm, heat escapes through the skin layer, so that the heat insulation of the molded body is deteriorated and the molded body is easily broken by impact.
【0010】本発明の表皮は最小厚さと標準厚さとの比
が1/2以上にする事が必要である。そして、これ以上
最小厚さが薄い所ができると断熱性,機械的性質が低下
する。本発明では断熱性を良好にするため、表皮も第2
図のように少し発泡させる事があるが、これは球形気泡
の0.25g/cc以上の密度の発泡体に限られる。球
形気泡の発泡体は強度があり、断熱性,耐吸湿性も良好
である。本発明では大きさの異なる二種類以上の粉末と
細粒とを用いて二層以上の表皮を造ることが出来る。こ
の時一方の表皮材の平均粒径が他方の平均粒径の2倍以
上である事が必要である。従って三層の表皮層を造るに
は1倍,2倍,4倍の平均粒径の三種の表皮材を用い
る。この技術を利用して一方の表皮を球形気泡の表皮に
し、その上に発泡していない薄い表皮を載せ、断熱性が
あり且つ表面が平滑,美麗な第3図の様な複合体を造る
事が出来る。The skin of the present invention needs to have a ratio of the minimum thickness to the standard thickness of 1/2 or more. If a portion having a minimum thickness smaller than that is formed, the heat insulating property and the mechanical properties are reduced. In the present invention, in order to improve the heat insulation,
The foam may be slightly foamed as shown in the figure, but this is limited to foam having a density of 0.25 g / cc or more of spherical cells. The foam of spherical cells has strength, and has good heat insulation and moisture absorption resistance. In the present invention, two or more layers of skin can be produced using two or more kinds of powders and fine granules having different sizes. At this time, it is necessary that the average particle size of one skin material is twice or more the average particle size of the other. Therefore, in order to form three skin layers, three kinds of skin materials having an average particle diameter of 1, 2, and 4 times are used. Using this technology, one skin is made into a spherical foam skin, and a thin non-foamed skin is placed on it to create a complex as shown in Fig. 3 that has thermal insulation and a smooth surface. Can be done.
【0011】本発明の表皮にも架橋剤を入れる事があ
る。これに依って表皮の凹凸を減らす事が出来る。又エ
チレン酢酸ビニル共重合体,エチレンエチルアクリレー
ト共重合体又は密度が0.910g/cc以下の直鎖状
低密度ポリエチレンの架橋表皮を使って柔らかい表皮が
出来、クッション材等に使われる。発明者等は表皮が均
一な厚さの複合体の製造方法を検討し、表皮に使用する
粉末プラスチックの190℃に於ける角周波数1(ra
d/s)の貯蔵弾性率が1×103(Pa)以上のもの
を用いる事により、この目的を達成する事を見出した。
ここに、貯蔵弾性率とはサンプルに周期的(正弦的)な
応力を与えると、それに対応する歪みも周期的(正弦
的)に変化するが、位相がずれる。応力を歪みで割ると
弾性率になるが、これをベクトル的又は複素的に表現す
るとG=G′+iG″となる。この弾性率の実数部が貯
蔵弾性率、虚数部が損失弾性率と言われる。夫々エネル
ギーの貯蔵と損失(熱として散逸)に関係するので、こ
の名称がある又、この貯蔵弾性率の測定方法は、例えば
コーンプレート.レオメータで行なわれる。この装置は
円板と円錐が対向(円錐の頂点を円板の中心に向けて)
しており、その間には粘弾性液体或いは融液が満たされ
ている。円板を周期的に振動させて、つられて動く円錐
の振動の振幅比と位相差から、粘弾性定数(例えば、
G′,G″)を求める。本発明に用いられる粉末プラス
チックは、貯蔵弾性率が1×103(Pa)以上の熱可
塑性樹脂の粉末で、好ましい貯蔵弾性率は5×10
3(Pa)以上で、更に好ましくは1×104(Pa)
以上である。The skin of the present invention may also contain a crosslinking agent. Thereby, the unevenness of the epidermis can be reduced. A soft skin can be formed by using a crosslinked skin of an ethylene vinyl acetate copolymer, an ethylene ethyl acrylate copolymer or a linear low-density polyethylene having a density of 0.910 g / cc or less, and is used as a cushion material. The present inventors studied a method for producing a composite having a uniform thickness of the skin, and found that the angular frequency of the powdered plastic used for the skin at 190 ° C. was 1 (ra).
It has been found that this object can be achieved by using a material having a storage modulus (d / s) of 1 × 10 3 (Pa) or more.
Here, the storage elastic modulus means that when a periodic (sinusoidal) stress is applied to a sample, the corresponding strain also changes periodically (sinusoidally), but the phase shifts. When the stress is divided by the strain, the elastic modulus is obtained. When this is expressed in vector or complex, G = G ′ + iG ″. The real part of the elastic modulus is called the storage elastic modulus, and the imaginary part is called the loss elastic modulus. The method of measuring the storage modulus is carried out, for example, with a cone plate rheometer, since it relates to the storage and loss of energy (dissipated as heat), respectively. Opposite (cone apex toward disk center)
Between which a viscoelastic liquid or melt is filled. By vibrating a disk periodically, the viscoelastic constant (for example,
G ′, G ″). The powdered plastic used in the present invention is a thermoplastic resin powder having a storage modulus of 1 × 10 3 (Pa) or more, and a preferable storage modulus is 5 × 10 3 (Pa).
3 (Pa) or more, more preferably 1 × 10 4 (Pa)
That is all.
【0012】貯蔵弾性率の大きい樹脂に相溶性を有する
貯蔵弾性率の低い樹脂、例えば中密度ポリエチレン等を
混合して使用する事もあり、これにより耐衝撃性が向上
する。高密度ポリエチレンに弾性率を向上させるために
低密度ポリエチレンを混合して使用する事もある。この
範囲の貯蔵弾性率を選択する別の理由は、最小厚さと平
均厚さとの比を大きくし表皮厚さを均一にする点であ
る。本発明の表皮材に無機物のフイラー,繊維等を入れ
る事があり、これにより表皮の厚さの均一化や難燃化を
計る事があり、又カーボンブラック,ステンレス繊維を
入れ、静電気の発生を防止する事もある。又、防黴剤,
坑菌剤,顔料等を使用する事もある。本発明の架橋発泡
性粒状体は、架橋剤と発泡剤とを混合したポリオレフイ
ン、又は発泡剤を混合したポリオレフインを電離性放射
線で架橋したものである。ポリオレフインの架橋発泡体
は、耐熱性が良好で、発泡剤が分解する温度の200℃
でも弾性率が低下せず、気泡が安定で、表皮の有る発泡
複合体の製造を可能にし、表皮と発泡体が完全に接着し
た成形体が出来る。In some cases, a resin having a low storage modulus compatible with a resin having a high storage modulus, such as a medium-density polyethylene, is mixed and used, thereby improving the impact resistance. In some cases, low-density polyethylene is mixed with high-density polyethylene to improve the elastic modulus. Another reason to select a storage modulus in this range is to increase the ratio of the minimum thickness to the average thickness and make the skin thickness uniform. The skin material of the present invention may contain inorganic fillers, fibers and the like, which may make the skin thickness uniform and flame retardant. Carbon black and stainless steel fibers may be used to reduce static electricity. It can be prevented. Also, fungicides,
Antibacterial agents, pigments, etc. may be used. The crosslinked expandable granular material of the present invention is obtained by crosslinking polyolefin mixed with a crosslinking agent and a blowing agent or polyolefin mixed with a blowing agent with ionizing radiation. The crosslinked polyolefin foam has good heat resistance and the temperature at which the blowing agent decomposes is 200 ° C.
However, the elastic modulus does not decrease, the cells are stable, the production of a foamed composite having a skin is enabled, and a molded article in which the skin and the foam are completely bonded can be obtained.
【0013】本発明の架橋剤はジクミルパーオキサイ
ド、2.5ジメチル2.5ジターシアリーブチルパーオ
キシヘキサン等の有機過酸化物である。架橋剤の分解温
度は約160℃で添加量は0.2PHR以上、1.2P
HR以下で、好ましくは0.5PHR以上、1.0PH
R以下である。そして、これにより多面体気泡の高倍率
の発泡体が造れる。架橋剤と共に1.2ポリブタジエン
トリアリルシアヌレート,トリアリルイソシアヌレー
ト,トリメチロールプロパントリメタクリレート等の反
応性二重結合を分子中に2個以上有する架橋助剤を用い
る事があり、架橋助剤を用いると均一微細な気泡の発泡
体になる。架橋助剤の添加量は有機過酸化物と同量位
で、架橋助剤を用いた時には有機過酸化物の量を減ら
す。ポリエチレンの架橋発泡体のゲル分率は、通常30
乃至80%である。ここに、ゲル分率とは90℃のトル
エン中に浸漬して、ゾル分を除いた樹脂分の%である。
架橋剤の分解温度は約160℃で、架橋剤を含むコンパ
ウンドの混練、押し出し等の加工は使用するポリエチレ
ンの融点に依って多少異なるが、通常、約130℃で行
なわれる。The crosslinking agent of the present invention is an organic peroxide such as dicumyl peroxide, 2.5 dimethyl 2.5 di-tert-butyl peroxyhexane. The decomposition temperature of the cross-linking agent is about 160 ° C and the amount added is 0.2 PHR or more,
HR or less, preferably 0.5 PHR or more, 1.0 PH
R or less. Thus, a high-magnification foam of polyhedral cells can be produced. A cross-linking aid having two or more reactive double bonds in a molecule such as 1.2 polybutadi-entry allyl cyanurate, triallyl isocyanurate, trimethylolpropane trimethacrylate may be used together with a cross-linking agent. When used, the foam becomes a uniform fine cell foam. The amount of the crosslinking aid is the same as that of the organic peroxide, and when the crosslinking aid is used, the amount of the organic peroxide is reduced. The gel fraction of a crosslinked foam of polyethylene is usually 30
To 80%. Here, the gel fraction is the percentage of the resin content excluding the sol content when immersed in 90 ° C. toluene.
The decomposition temperature of the cross-linking agent is about 160 ° C., and processing such as kneading and extrusion of the compound containing the cross-linking agent slightly varies depending on the melting point of the polyethylene used, but is usually performed at about 130 ° C.
【0014】本発明の架橋発泡性粒状体は、架橋剤と発
泡剤とを混合したポリエチレン,ポリプロピレン,エチ
レン酢酸ビニル共重合体等のポリオレフインで粉末プラ
スチックに比して粒径の大きいものである。粉末プラス
チックの粒径は約0.1mmで粒状体の粒径は通常4m
mである。従って粒状体の粒径は粉末プラスチックの4
0倍であるが、その体積,重量は、その3乗の64.0
00倍である。よって、粒状体の温度上昇は遅く、運動
エネルギーが大きく、金型への付着は遅れ、両者は画然
と分かれて表皮層が出来た上に粒状体が付着する。そし
て、その形は球体、長さが径と略等しいロッド,立方
体,立方体に近い直方体等で金型内で回転により動きや
すい形のものが好ましい。粒状体は金型の内面に付着し
て発泡するが、この発泡は相似形に膨張し、均一微細の
気泡になる。粒状体の金型への付着が不均一であると、
気泡が変形しながら膨張し、これが歪みとなり、出来た
成形体の形くずれを起こす。好ましい粒状体の平均粒径
は2乃至10mmで、好ましくは3乃至7mmである。
本発明では金型の内面に付着した発泡粒子が発泡するの
で、この粒子の大きさを選択し均一に,且つ、一層に分
散付着させると、一層又は二層に発泡粒子が なったコ
アにする事が出来、この発泡体は均一微細な気泡となり
ボイドが生じない。この粒状体の表面にタルク,クレイ
等の無機粉末を付着させて用いると材料の摩擦による帯
電を防止して発泡相に表皮材が混入しなくなる。好まし
い材料は低密度ポリエチレンでMIが0.5乃至10
で、好ましくは1乃至3で、密度が0.915乃至0.
930のものである。The crosslinked expandable granular material of the present invention is a polyolefin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer or the like in which a crosslinking agent and a foaming agent are mixed, and has a larger particle size than powdered plastic. The particle size of powdered plastic is about 0.1mm and the particle size of granular material is usually 4m
m. Therefore, the particle size of the granular material is 4
0 times, but its volume and weight are the cube of 64.0
It is 00 times. Therefore, the temperature rise of the granular material is slow, the kinetic energy is large, the adhesion to the mold is delayed, and the two are clearly separated to form a skin layer, and the granular material adheres. The shape is preferably a sphere, a rod, a cube having a length substantially equal to the diameter, a cube, a rectangular parallelepiped close to a cube, or the like, which can be easily moved by rotation in a mold. The granular material adheres to the inner surface of the mold and foams, and the foam expands in a similar shape and becomes uniform fine bubbles. If the adhesion of the granular material to the mold is uneven,
The bubbles expand while deforming, which causes distortion, which causes the molded article to lose its shape. The preferred average particle size of the granular material is 2 to 10 mm, preferably 3 to 7 mm.
In the present invention, since the foamed particles adhered to the inner surface of the mold are foamed, if the size of the particles is selected and uniformly and dispersed and adhered to one layer, a core having one or two layers of foamed particles is obtained. The resulting foam has uniform and fine cells and no voids. When an inorganic powder such as talc or clay is adhered to the surface of the granular material and used, the charging due to friction of the material is prevented, and the skin material is not mixed into the foamed phase. A preferred material is a low density polyethylene having an MI of 0.5 to 10
, Preferably 1 to 3 and a density of 0.915 to 0.
930.
【0015】本発明の発泡性粒状体には発泡剤としてア
ゾジカーボンアミド,ジニトロソペンタメチレンテトラ
ミン又はこの発泡剤の混合物等の分解発熱性の発泡剤が
使用され、これ等の発泡剤の分解温度は約200℃であ
る。そして、この発泡剤の混合量は5PHR以上40P
HR以下であり、好ましくは7.5PHR以上30PH
R以下である。発泡剤が上記の配合量で、金型の温度が
発泡剤の分解温度に達すると発泡性粒状体は急速に、且
つ均一に発泡して略その温度を保ちながら膨張を完了す
る。発泡剤が5PHR以下では発泡剤の分解が均一に行
なわれず発熱が少なく、ボイドが出来やすい。発泡剤が
40PHR以上だと独立気泡の発泡体にならない。発泡
剤と共にステアリン酸亜鉛等の発泡助材を用い、発泡温
度を低下させる事も有るが、架橋剤の分解温度以下には
しない。又、発泡剤と共にフイラー等の核剤を用い気泡
を微細化する事もある。本発明では発泡相にボイドが出
来る事がある、このため発泡剤を多目に使用して、金型
内を加圧状体にして成形する。発泡剤が分解してポリエ
チレンの架橋発泡体が膨張し金型内に充満するが、この
時、金型内に予め存在した空気は金型の中央に集まり、
金型に挿入されているパイプにより逃散する。The foaming granular material of the present invention uses a decomposing and exothermic foaming agent such as azodicarbonamide, dinitrosopentamethylenetetramine or a mixture of these foaming agents as a foaming agent. The temperature is about 200 ° C. And the mixing amount of this foaming agent is 5 PHR or more and 40 P
HR or less, preferably 7.5 PHR or more and 30 PH
R or less. When the temperature of the mold reaches the decomposition temperature of the foaming agent and the foaming agent is in the above-described amount, the foamable granules rapidly and uniformly foam and complete the expansion while keeping the temperature substantially. When the blowing agent is 5 PHR or less, the decomposition of the blowing agent is not performed uniformly, so that heat generation is small and voids are easily formed. If the foaming agent is 40 PHR or more, it does not become a closed-cell foam. A foaming agent such as zinc stearate may be used together with the foaming agent to lower the foaming temperature, but the temperature is not lower than the decomposition temperature of the crosslinking agent. In some cases, a nucleating agent such as a filler is used together with the foaming agent to make the air bubbles fine. In the present invention, voids may be formed in the foamed phase. For this reason, a foaming agent is used extensively, and the inside of the mold is formed into a pressurized body. The foaming agent is decomposed, the cross-linked foam of polyethylene expands and fills the mold.At this time, air previously existing in the mold gathers at the center of the mold,
Escape due to the pipe inserted into the mold.
【0016】本発明に使用する金型は熱伝導性の良い
鉄,アルミ,真鍮等の金属材料の板材、又は鋳物で造ら
れる。二つ割りか、側壁と上,下の蓋で成るのが普通で
ある。通常、回転成形用の金型は板金によって造られる
のが普通で、金型の肉厚は2乃至3mmである。本願の
金型は発泡圧がかかるので、このような金型では発泡圧
に耐えられず、4mm以上の厚さの鉄板か、又は、それ
と同等以上の強度と熱容量の材料で金型を造る。通常、
アルミ鋳物にするか、鉄板を溶接して造る。鉄板を溶接
した金型では、角の部分の外側の材料を断面直角二等辺
三角形状に削り、金型の内側の角との距離を近くする。
これに依り、この金型を使って出来た成形体の角の部分
の表皮材にRをつける事が出来る。金型には発泡時金型
内にあった空気を逃散させるための径3乃至10mmの
小孔を1乃至数個設ける。そして、この小孔にパイプを
はめ、一端は外に出し、他端はなるべく金型の中央に近
い所にする。このパイプにはテフロンチューブが用いら
れるが、先端にはプラスチック粉末が外に出ないように
孔あきのテフロンチューブを巻いたり、グラスフアイバ
ーを詰めたりする。この小孔を設けない金型で回転成形
すると、発泡相にボイドが発生しやすい。尚、金型にゴ
ムパッキングを使用するとボイドが発生するので、通
常、パッキングは用いない。金型の外側に銅管を溶接し
て、これに油を通し、金型の加熱、冷却を行なう方法が
あり、この方法では、加熱,冷却が均等に行なえる特徴
があり、角の部分の加熱を強くして、成形体の角にRが
付けられる。The mold used in the present invention is made of a metal material such as iron, aluminum, or brass having good thermal conductivity, or a casting. It usually consists of two parts, a side wall and an upper and lower lid. Usually, a mold for rotational molding is usually made of sheet metal, and the thickness of the mold is 2 to 3 mm. Since the mold of the present application is subjected to the foaming pressure, such a mold cannot withstand the foaming pressure, and is made of an iron plate having a thickness of 4 mm or more, or a material having strength and heat capacity equivalent to or more than that. Normal,
It is made by casting aluminum or welding an iron plate. In a mold in which an iron plate is welded, the material outside the corner is cut into an isosceles triangle having a right-angle cross section, and the distance to the inside corner of the mold is reduced.
Accordingly, it is possible to add R to the skin material at the corners of the molded body formed using this mold. The mold is provided with one or several small holes having a diameter of 3 to 10 mm for allowing air existing in the mold at the time of foaming to escape. Then, a pipe is fitted into this small hole, one end is put out, and the other end is placed as close to the center of the mold as possible. A Teflon tube is used for this pipe, and a perforated Teflon tube or a glass fiber is wrapped around the tip so that the plastic powder does not go outside. When rotational molding is performed using a mold having no small holes, voids are likely to be generated in the foamed phase. Note that voids are generated when rubber packing is used for the mold, so that packing is not usually used. There is a method in which a copper tube is welded to the outside of a mold, oil is passed through the tube, and the mold is heated and cooled. In this method, heating and cooling can be performed evenly. By increasing the heating, the corners of the compact are rounded.
【0017】金型の回転は二軸回転,揺動回転等であ
り、一軸回転は表皮の薄い所が出来るので用いない。回
転は通常1乃至20rpmで、金型内に入れた材料に遠
心力が加わらないような、ゆっくりした回転である。こ
の回転は、正回転と逆回転を併用するのが普通である。
加熱は、熱風,直火,蒸気加熱,油加熱等によって行な
われる。加熱温度は、金型の温度,表皮の温度を発泡剤
の分解温度である170乃至230℃好ましくは190
乃至210℃にする。加熱時間は通常20乃至40分で
ある。表皮の温度が発泡剤の分解温度になると、個々の
粒状体は金型への付着部分から発泡し、分解型の発泡剤
が多量に含まれているため、急速に粒全体に波及して膨
張する。そして、本願では金型が均一な温度に保たれ発
泡粒が均一な温度の表皮に付着して昇温しているので、
粒状体の膨張は一斉に起こり金型の内壁から中央に向か
って膨張する。発泡剤の分解は発熱反応であるが、発泡
剤は多量のポリオレフイン中に均一に分散しているので
急速に発泡するが温度上昇は少なく、発泡剤の分解温度
を保ちながら膨張は終わる。そして、発泡粒子は表皮材
の上に均一に分布付着していて一斉に膨張するので、発
泡粒子は相似形を保ちながら最短距離を通って膨張し、
均一微細な気泡の低密度の独立気泡となり、ボイドや歪
みが発生しない。加熱の後、金型は水中に浸漬するかシ
ャワーにより急速に冷却され、発泡複合体は金型より取
り出される。水冷により表皮は急速に冷却,硬化する
が、この時中央の発泡相は溶融しており、発泡圧がかか
りながら表皮が硬化するので、表面が平滑美麗で金型の
形通りで、時間の経過で収縮しない成形体になる。尚、
空気中に放置して徐冷すると、変形した成形体になり耐
衝撃性が低下する。The rotation of the mold is biaxial rotation, swing rotation, and the like. Uniaxial rotation is not used because a thin skin is formed. The rotation is typically 1 to 20 rpm and is a slow rotation such that no centrifugal force is applied to the material placed in the mold. This rotation normally uses both forward rotation and reverse rotation.
Heating is performed by hot air, direct fire, steam heating, oil heating, or the like. The heating temperature is set at 170 to 230 ° C., preferably 190 ° C., which is the decomposition temperature of the foaming agent.
To 210 ° C. The heating time is usually 20 to 40 minutes. When the temperature of the skin reaches the decomposition temperature of the foaming agent, each granular material foams from the part attached to the mold, and because it contains a large amount of the decomposition type foaming agent, it quickly spreads over the entire grain and expands I do. And in the present application, since the mold is kept at a uniform temperature and the foamed particles adhere to the skin at a uniform temperature and the temperature is raised,
The expansion of the granular material occurs all at once and expands from the inner wall of the mold toward the center. Decomposition of the blowing agent is an exothermic reaction, but since the blowing agent is uniformly dispersed in a large amount of polyolefin, it rapidly foams, but the temperature rise is small, and the expansion ends while maintaining the decomposition temperature of the blowing agent. And since the foaming particles are uniformly distributed and attached on the skin material and expand at the same time, the foaming particles expand through the shortest distance while maintaining a similar shape,
It becomes low-density closed cells of uniform fine bubbles, and does not generate voids or distortion. After heating, the mold is immersed in water or rapidly cooled by a shower, and the foam composite is removed from the mold. The skin rapidly cools and hardens due to water cooling. At this time, the foaming phase in the center is molten and the skin hardens while applying foaming pressure, so the surface is smooth and beautiful, and the shape of the mold elapses. The resulting molded body does not shrink. still,
When left to cool in air, the molded article becomes deformed and has a reduced impact resistance.
【0018】本願の発泡成形体は断熱性に優れ、湿度の
高い所に長期間置いても吸湿しない省エネルギー用の断
熱材で、表皮は熱可塑性プラスチックの0.25mm以
上の厚さで、表皮の最小厚さが標準厚さの1/2以上
で、この表皮によって発泡体の全面が覆われ、気泡径が
小さいポリオレフインの架橋発泡体で、密度が0.2g
/cc以下で、好ましくは0.03g/cc近辺で、発
泡層にボイド,ピンホール,歪みが無く、表皮と発泡体
との接着力が、発泡体の強度以上の複合体である。そし
て、このような複合体で、始めて、断熱材として建物の
耐用年数の50年にも及ぶ長期間を吸湿せず、従って、
断熱性が低下しないでエネルギーの使用増加を抑制でき
る。そして、表皮が発泡体の全面を覆い発泡体の相が空
気と接触していないことが必要で、発泡体に孔をあける
時には孔の表面にも表皮を造る事が出来る。熱伝導率の
低いことが望まれる部分の表皮を薄くし、強度が必要な
部分の表皮を厚くして、強度が有り断熱性の良好な成形
体を造る事が出来る。又一部のコアを厚くして、その部
分の断熱性を向上させる事も有る。本発明の発泡複合体
は、サンドイッチ構造体なので、表皮と発泡体とが良く
接着しているのが必須の要件で、良く接着して一体とな
っていて始めて耐吸湿性が向上し、曲げ強度等の機械的
性質も良好になる。本発明の発泡体は、ポリオレフイン
の低密度の架橋発泡体で半硬質のフオームである。従っ
て、この発泡体は圧縮強度が、あまり高くないので、強
度の有る複合体にするには丈夫な表皮に強固に接着させ
る必要があり、その接着力は発泡体の強度以上である事
が必要である。表皮と発泡体との複合体で、接着が不十
分なものは、僅かな傷が出来ても吸湿し曲げ強度,圧縮
強度,衝撃強度が低下する。発泡層の厚さは、通常10
乃至100mmで、10mm以下にすると表皮と発泡層
との分離が不十分になりやすく、100mm以上の層に
する事も可能であるが、100mm以上にすることは稀
である。本発明の発泡複合体より、表皮と5mm厚さの
発泡層との接合体を切り出し、その大きさを例えば幅1
0mm長さ100mmにして、一方の端よりナイフを入
れて、その半分の表皮と発泡体とを分離し、これを引き
離すように180度の方向に表皮と発泡体とを引っ張っ
ても、引き離しは出来ず発泡体が切断する。本発明の発
泡体はポリオレフインの架橋発泡体で弾性があり、衝撃
吸収性がある。従って、これに丈夫な表皮材を用いた物
は、極めて丈夫で衝撃で壊れない。又、本発明の発泡複
合板は、側面にも丈夫な表皮があるのも特徴で、これが
曲げや圧縮強度,衝撃強度の大きいのに寄与している。
本発明の複合体はクッション材に使用することがあり、
この時表皮を1mm以下、好ましくは0.5mm以下に
する。又、軟質のエチレン酢酸ビニル共重合体を表皮に
したり、球形気泡の発泡体を表皮にする。又、1mm以
上の厚さの表皮にするとクッション性は悪い。本発明で
は第1図のように表皮と発泡体との成形体を造るもので
あるが、又第4図のような表皮があり、その下に発泡層
があり、真中に成形体と略相似形の気体層のある複合体
を造ることが出来る。そして、この成形体は弾性に優
れ、軽量安価でクッション材、浮き等に使用される。
尚、大きな成形体では芯まで発泡体を詰める必要の無い
ものが多い。この成形体の発泡相の厚さは25乃至10
0mmで、これで十分な強度がある。The foam molded article of the present invention is an energy-saving heat insulating material which has excellent heat insulating properties and does not absorb moisture even if it is placed in a humid place for a long period of time. The skin is made of a thermoplastic plastic having a thickness of 0.25 mm or more. The minimum thickness is 1/2 or more of the standard thickness. The skin covers the entire surface of the foam, and the cross-linked foam of polyolefin having a small cell diameter and a density of 0.2 g.
/ Cc, preferably around 0.03 g / cc, a composite having no voids, pinholes, or distortions in the foamed layer, and having an adhesive strength between the skin and the foam that is equal to or greater than the strength of the foam. And for the first time, with such a composite, it does not absorb as long as 50 years of the service life of the building as a thermal insulator, and therefore,
An increase in the use of energy can be suppressed without lowering the heat insulation. It is necessary that the skin covers the entire surface of the foam and the foam phase does not come into contact with air. When a hole is formed in the foam, a skin can be formed on the surface of the hole. It is possible to make a molded body having strength and good heat insulation by thinning the skin of a portion where low thermal conductivity is desired and thickening the skin of a portion requiring strength. Also, a part of the core may be thickened to improve the heat insulating property of the part. Since the foamed composite of the present invention is a sandwich structure, it is essential that the skin and the foam be well bonded, and the moisture absorption resistance is improved only after being well bonded and integrated, and the bending strength is improved. And other mechanical properties. The foam of the present invention is a semi-rigid, low density, crosslinked foam of polyolefin. Therefore, this foam does not have very high compressive strength, so it is necessary to firmly adhere to a strong skin to make a strong composite, and the adhesive strength must be higher than the strength of the foam. It is. In the case of a composite of a skin and a foam having insufficient adhesion, even if a slight scratch is formed, the composite absorbs moisture and the bending strength, compression strength, and impact strength are reduced. The thickness of the foam layer is usually 10
When the thickness is 10 mm or less, the separation between the skin and the foam layer tends to be insufficient, and it is possible to make the layer 100 mm or more. However, it is rare that the thickness is 100 mm or more. From the foamed composite of the present invention, a joined body of a skin and a foamed layer having a thickness of 5 mm is cut out, and the size thereof is, for example, 1 width.
Even if it is 0 mm in length and 100 mm in length, a knife is inserted from one end, the skin and the foam are separated from each other in half, and the skin and the foam are pulled in a direction of 180 degrees so as to separate the skin and the foam. Unable to cut foam. The foam of the present invention is a crosslinked polyolefin foam which is elastic and shock absorbing. Therefore, a product using a durable skin material is extremely durable and does not break due to impact. The foam composite board of the present invention is also characterized by having a strong skin on the side surface, which contributes to high bending, compressive strength and impact strength.
The composite of the present invention may be used for a cushion material,
At this time, the outer skin is made 1 mm or less, preferably 0.5 mm or less. Further, a soft ethylene-vinyl acetate copolymer is used as a skin, and a foam having spherical cells is used as a skin. If the thickness is 1 mm or more, the cushioning property is poor. In the present invention, a molded body of a skin and a foam is made as shown in FIG. 1. However, there is a skin as shown in FIG. 4, and there is a foam layer under the skin, and the molded body is substantially similar to the molded body in the middle. Composites with a shaped gas layer can be made. The molded body has excellent elasticity, is lightweight and inexpensive, and is used for cushioning materials, floating, and the like.
It should be noted that many large molded articles do not need to be filled with the foam up to the core. The thickness of the foamed phase of this molded product is 25 to 10
At 0 mm, this is sufficient strength.
【0019】架橋発泡性材料を球形又はロッド状にし、
これに発泡しないか、僅かに発泡する材料を被覆した物
を発泡性材料として用いることも有る。この材料を金型
に入れて発泡させると、第5図のように、発泡層に発泡
しないか、僅かに発泡した材料の区画が出来、この区画
が成形体の表皮と接合して強度メンバーとなり機械的強
度に優れた複合体になる。区画の厚さは通常表皮の厚さ
と同じで、その間隔は30乃至100mmにする。この
成形体で表皮材を用いないで成形すると、金型に接する
部分の表皮が薄くなり強度が低い。この成形体は軽量
で、強度と断熱性に優れる理想的材料で、床材,屋根
材,コンテナー用材料等に用いられる。本発明では表皮
があり、その下に発泡層があり、第6図に示す如く、真
中にプラスチック,ゴム等の粒状体、本発泡複合体を砕
いた粒状体等のある複合体を造ることが出来る。この成
形には粉末プラスチックと架橋発泡性粒状体と、この架
橋発泡性粒状体より更に形の大きいプラスチック、ゴム
及び本発泡複合体等の廃棄物等の粒状体を金型に入れ
て、回転しながら加熱して造るもので、これに依り形の
大きい廃棄物等が成形体の中央に集まり、丈夫で断熱性
がまずまずの成形体が出来、プラスチック,ゴム,本発
泡体の廃棄物の利用に好適である。そして、この技術で
はプラスチックの廃棄物として他の方法では利用出来な
い架橋ポリエチレンの廃棄物,FRPの廃棄物,本複合
体の廃棄物も用いる事が出来る。この大きい形の粒状体
の使用量は成形体の重量の40乃至70%である。そし
て、この成形体は表皮の下に発泡体の相があるので断熱
性が良好で、衝撃を受けても壊れないので、パレット,
建築用の型枠,地下室や水回り用の柱、板等に用いられ
る。 本発明では、表皮用材料、架橋発泡性粒状体の材
料に産業廃棄物を利用する事が出来る。本発明の表皮
材、架橋発泡性粒状体には少量の泥や砂が入っても成形
に影響しない。又、本発明の発泡は架橋発泡性粒状体に
よるもので、小さい粒子が多数集合状態で発泡して発泡
層を形造る。従って、例えば、少量の発泡性の悪い粒子
が混じっていても平気である。そして、プラスチック廃
棄物で成形した複合体の表皮に薄い廃棄物でない表皮を
付ける事があり、この厚さは通常0.1乃至0.5mm
で、これでプラスチック廃棄物を用いた欠点は解消され
る。本発明では表皮と発泡層の一方又は双方に難燃剤を
入れて成形し、難燃性のある成形体とすることが出来
る。本発明の成形体は、金型内にプラスチックフイル
ム,複合フイルム,金属箔,薄い金属シートを貼ってお
いて成形し、これ等の物が成形体の表面に接着した成形
体を造る事ができる。本発明の成形体の表皮にフイラ
ー,ガラス繊維,カーボンブラック,ステンレス繊維等
を入れ表皮を増強し、又、静電気の発生を防止すること
が出来る。又、凹凸のある金型を用いて表面に凹凸のあ
る成形体とする事も出来る。The crosslinked foamable material is formed into a spherical shape or a rod shape,
A material coated with a non-foamed or slightly foamed material may be used as the foamable material. When this material is put into a mold and foamed, as shown in FIG. 5, the foamed layer does not foam, or a slightly foamed material section is formed, and this section is joined to the skin of the molded body to become a strength member. It becomes a composite with excellent mechanical strength. The thickness of the compartments is usually the same as the thickness of the epidermis, with a spacing of 30 to 100 mm. If this molded body is molded without using a skin material, the skin in contact with the mold becomes thin and the strength is low. This molded article is an ideal material that is lightweight, excellent in strength and heat insulation, and is used for flooring, roofing, container materials and the like. In the present invention, there is a skin, a foam layer underneath, and as shown in FIG. 6, it is possible to produce a composite having a granular material such as plastic, rubber, etc., and a granular material obtained by crushing the foam composite in the middle. I can do it. In this molding, the powdered plastic, the crosslinked foamable granules, and the granules such as plastic, rubber, and waste such as the present foamed composite, which are larger in size than the crosslinked foamable granules, are put into a mold and rotated. It is made by heating while heating, and large-sized wastes etc. gather at the center of the molded body due to this, and a strong and reasonably heat-insulating molded body can be made, and plastics, rubber, and waste of this foam can be used. It is suitable. In this technique, it is possible to use crosslinked polyethylene waste, FRP waste, and waste of the composite which cannot be used as a plastic waste by other methods. The amount of the large-sized granules used is 40 to 70% of the weight of the compact. This molded body has good heat insulation because of the foam phase under the skin, and does not break even when subjected to impact.
Used for architectural formwork, basement, water column, board, etc. In the present invention, industrial waste can be used as the material for the skin and the material of the crosslinked expandable granular material. Even if a small amount of mud or sand enters the skin material and the crosslinked expandable granular material of the present invention, it does not affect the molding. In addition, the foaming of the present invention is based on crosslinked foamable granules, and a large number of small particles foam in an aggregated state to form a foamed layer. Therefore, for example, even if a small amount of particles having poor foamability are mixed, it is fine. A thin non-waste skin may be attached to the skin of the composite molded with plastic waste, and the thickness is usually 0.1 to 0.5 mm.
Thus, the disadvantage of using plastic waste is eliminated. In the present invention, a flame retardant is added to one or both of the skin and the foam layer and molded to obtain a molded article having flame retardancy. The molded article of the present invention can be formed by pasting a plastic film, a composite film, a metal foil, and a thin metal sheet in a mold, and then molding the molded article with these objects adhered to the surface of the molded article. . Filler, glass fiber, carbon black, stainless steel fiber or the like can be added to the skin of the molded article of the present invention to enhance the skin and prevent generation of static electricity. Further, a molded article having an uneven surface can be obtained by using an uneven mold.
【0020】本発明では、金型に小孔を空けて金具を取
り付け、ボルト,ナット,パイプ,フック等を発泡複合
体に埋め込む事が出来る。例えば、ボルトを埋め込むに
は金型の内側にボルトを入れ、ボルトの両端を金型の小
孔に通して、その先端にナットを付けて成形する。熱
は、金型の外にあるナットから、ボルトに伝わって加熱
しボルトの表面に表皮を造り、この表皮が発泡複合体の
表皮や発泡層と接合していて、ボルトを強固に固定す
る。従って、取り付ける金具は、金型の外にその一部が
あり、そこから熱を金具に供給する必要がある。そし
て、この金具により、複合成形体同士、又は、他の物体
との強固な接続が簡単に出来る。又、発泡板に金属パイ
プを使って板と直角の表皮を造ると、この表皮は板の
上、下の表皮と繋がっていて、且つ、発泡相とも良く接
着しているので、この発泡板の耐圧縮性,耐衝撃性,耐
曲げ強度を著しく改善する。このように本発明の発泡複
合体は金具を取り付けられ、又、金具を利用して、厚さ
が1.0mm以上の表皮の有る板に直角の孔ずくりが可
能であり、このような孔を設けると、その孔に水や空気
を長期間通しても、発泡体が吸水、吸湿せず、断熱性が
低下しない。そして、この孔は、深夜電力の利用や太陽
熱利用の温水,冷水の貯蔵の断熱箱に利用される。In the present invention, a metal fitting is attached to the mold by making a small hole, and bolts, nuts, pipes, hooks, and the like can be embedded in the foam composite. For example, in order to embed a bolt, the bolt is inserted into the inside of a mold, both ends of the bolt are passed through small holes of the mold, and a nut is attached to a tip of the bolt to form the bolt. The heat is transmitted from the nut outside the mold to the bolt and heated to form a skin on the surface of the bolt, and the skin is bonded to the skin and the foam layer of the foamed composite, thereby firmly fixing the bolt. Therefore, there is a part of the metal fitting outside the mold, and it is necessary to supply heat to the metal fitting from there. And with this metal fitting, strong connection between the composite molded bodies or other objects can be easily performed. Also, if you make a skin perpendicular to the board using a metal pipe on the foam board, this skin is connected to the top and bottom skins of the board, and it is well bonded to the foam phase, so this foam board Significantly improves compression resistance, impact resistance, and bending strength. In this manner, the foam composite of the present invention can be provided with a metal fitting, and the metal fitting can be used to form a right-angled hole in a plate having a skin having a thickness of 1.0 mm or more. Is provided, even if water or air is passed through the pores for a long period of time, the foam does not absorb water and moisture, and the heat insulating property does not decrease. This hole is used for a heat insulation box for storing hot water and cold water using nighttime power or solar heat.
【0021】本発明の成形体に凸部を造り、この成形体
又は他の成形体に同じ寸法の凹部又は孔を造り、これを
結合して成形体を繋ぐ事が出来る。本発明の成形体は弾
性のあるコアの上に平滑な表皮があるので、この成形体
は凹凸結合で、丈夫で気密性を保持した結合が出来、一
度結合したらなかなか外れない。本発明の成形体にはボ
ルトが埋められるので、この結合を完全にするため、ボ
ルトを埋め針金等で結束する事も出来る。例えば、この
結合で浮き桟橋を造り、結合して橋とする事が出来る。
又、1×2mで厚さ50mmの板を造り、これを凹凸結
合して野球場のフエンスとする事が出来る。この板は自
立性があり、押え用の横板を造り、これに止めるだけで
良く衝撃吸収性があり、選手が当たっても怪我をしな
い。本発明の板状体は冷蔵倉庫等に多く使用されるが、
強度を必要としない壁や天井は板状体を凹凸結合するだ
けで使用でき、強度が必要な所だけ押え板を使用する。
自動車,電車,船舶等の冷凍室も同様である。本発明の
成形体の凸部と成形体の孔との結合は、凸部の先に少し
テーパーを付けて孔に入り易くし、入り切った所に段差
を造って、一度入ったら簡単には外れない構造にする。
本成形体は表皮とコアとで成っているので、コアの弾性
で結合し易く、丈夫な表皮で結合が外れにくい。It is possible to form a convex portion on the molded product of the present invention, form a concave portion or a hole of the same size in this molded product or another molded product, and connect these to connect the molded products. Since the molded article of the present invention has a smooth skin on an elastic core, this molded article can be bonded by uneven bonding, and can be bonded while maintaining strong and airtightness. Since the bolt is buried in the molded article of the present invention, the bolt can be buried and bound with a wire or the like to complete this connection. For example, a floating pier can be constructed by this connection and then combined to form a bridge.
In addition, a plate of 1 × 2 m and a thickness of 50 mm can be made, and this can be unevenly combined to form a baseball stadium fence. This board is self-supporting, makes a horizontal plate for holding down, just stops on it, it absorbs shock well, and it does not hurt even if hit by a player. Although the plate-shaped body of the present invention is often used in refrigerated warehouses and the like,
Walls and ceilings that do not require strength can be used simply by connecting the plate-like body unevenly, and the holding plate is used only where strength is required.
The same applies to freezing rooms of automobiles, trains, ships, and the like. The connection between the convex part of the molded body of the present invention and the hole of the molded body is easy to enter into the hole by slightly tapering the tip of the convex part, and a step is formed at the place where it enters and exits, and once it enters, it is easy Make the structure that does not come off.
Since the present molded body is composed of the skin and the core, it is easy to be connected by the elasticity of the core, and the connection is not easily released by the strong skin.
【0022】本発明の方法で長尺の円筒体又は半円筒体
をつくり、その一端に雄ネジを、他端に雌ネジをつけ、
これを結合(半円筒体は二枚合せて)して温泉パイプの
保温パイプとして使用できる。このパイプは強度,弾性
があるので継ぐだけで使用可能である。このパイプを難
燃性にしてダクトとしても使用でき、難燃性を完全にす
るため、ブリキ等の薄い金属のカバーを掛けるが、更に
完全にするため、このカバーと中のパイプとの間に若干
の間隙をつくる事もある。According to the method of the present invention, a long cylindrical or semi-cylindrical body is made, and a male screw is attached to one end and a female screw is attached to the other end.
This can be combined (two semi-cylindrical bodies are combined) and used as a heat retaining pipe for a hot spring pipe. Since this pipe has strength and elasticity, it can be used simply by joining. This pipe can be used as a duct by making it flame-retardant, and in order to complete the flame-retardancy, a thin metal cover such as tinplate is hung. Some gaps may be created.
【0023】本発明で長尺半円筒体をつくり、この両端
に凹凸を造って結合できる様にし、重りを付けて沈め、
半円筒体の凹面が沖に向って、水面が凹面の中心に来る
ようにする。船舶が沈んで油が押し寄せて来ても油はこ
の半円筒体を超えることも、潜り抜ける事も出来ないの
で、この半円筒体の所に集まる。そして、この方法では
油の回収も極めて遣りやすい。そして、この結合が出来
る長尺体は本願の方法以外では出来ない。According to the present invention, a long semi-cylindrical body is formed, and irregularities are formed at both ends thereof so that the semi-cylindrical body can be joined, and a weight is attached and sunk.
The concave surface of the semi-cylindrical body faces offshore so that the water surface is at the center of the concave surface. Even if the ship sinks and the oil rushes in, the oil will not be able to pass over this half-cylinder or get under it, so it will collect at this half-cylinder. In this method, oil recovery is extremely easy. A long body to which this connection can be made cannot be made except by the method of the present application.
【0024】本発明の方法で発泡板を造る時、ボルトを
通す孔を成形時に造り、表皮のある孔とし、異なる場所
にナットを埋め込み、この様な板6枚を使って、ボルト
を孔に通し、別の板のナットと結合する事に依って水密
箱とする事が出来る。本願の発泡板はボルトを締めるだ
けで、容易に水密箱になる。軽量で、丈夫で、且つ断熱
性があって、解体,組み立て,水洗いが容易なので、魚
の運搬箱,特に活魚の運搬箱として都合の良い物であ
る。When forming a foam board by the method of the present invention, a hole for passing a bolt is formed at the time of molding, a hole having a skin is formed, a nut is embedded in a different place, and the bolt is formed in the hole using six such plates. It can be made into a watertight box by connecting it with a nut of another plate. The foam board of the present invention can easily be made into a watertight box simply by tightening bolts. Since it is lightweight, durable, heat-insulating, and easy to disassemble, assemble, and wash with water, it is a convenient container for fish, especially for live fish.
【0025】鉄のアングルで箱状の枠を造り、これに発
泡板を並べ、アングルにネジ孔を空けて、ボルトで発泡
板に圧力を掛けられる構造にし、発泡板同士の接触部に
はゴムや発泡プラスチックのパッキングを用い、気密な
断熱箱とする事が出来る。この技術の成形体は、金型の
中でコアが高温で圧力がかかりながら、表皮が冷却され
て出来るので、板が極めて平滑で寸法精度が良く仕上が
り、この様な使い方が出来る。板6枚だけの箱でなく、
例えば一面4枚ずつの24枚を使った箱でも、それより
大きい形の箱でも出来る。A box-shaped frame is formed from an iron angle, a foam plate is arranged on the frame, holes are formed in the angle, and pressure is applied to the foam plate with bolts. It can be made into an air-tight heat-insulated box by using packing made of foam or plastic. The molded body of this technology can be formed by cooling the skin while applying pressure at a high temperature to the core in the mold, so that the plate is extremely smooth and finished with good dimensional accuracy, and thus can be used in this way. Instead of a box with only six boards,
For example, a box using 24 sheets of 4 sheets each, or a box having a larger shape can be used.
【0026】本発明の成形体はサンドイッチ構造で、中
央に耐衝撃性のポリオレフィンの架橋発泡体があり、上
下の表皮と一体に接合しているので、衝撃で壊れない。
勿論、衝撃に依ってぶつかった部分の表皮は壊れる事は
あるが、コアの発泡体や反対側の表皮を壊す事は全く無
い。この性質を利用して大きなドラムを造り、そして、
硝子で固めた放射性廃棄物を入れたステンレスドラムを
この中に入れ、この二つのドラムの間に、高温では流動
するが室温では流動しないゴム又は油を入れて密封する
と、放射性廃棄物の保管用として長年月経ても錆びる事
は無い。この材料でガソリンタンクを造ると、自動車の
衝突時、衝撃で壊れないので火災が発生しない。The molded article of the present invention has a sandwich structure, a cross-linked foam of impact-resistant polyolefin in the center, and is integrally bonded to upper and lower skins, so that it is not broken by impact.
Of course, the skin of the part hit by the impact may be broken, but the foam of the core and the skin on the opposite side are not broken at all. Making a big drum using this property,
A stainless steel drum containing radioactive waste solidified with glass is placed in it, and rubber or oil that flows at high temperature but does not flow at room temperature is sealed between these two drums, and sealed for storage of radioactive waste. Never rust for many years. If a gasoline tank is made of this material, it will not break due to impact when a car crashes, so no fire will occur.
【0027】この成形体の中央にボルト又はナットを埋
め込むと、この成形体は容易に他の物に固定する事が出
来る。例えば椅子を成形し、この成形体にナットを埋め
込み、車体にボルトを付けて、このボルトとナットで椅
子を車体に取り付ける。本願の椅子は、プラスチックの
表皮と発泡体だけで出来ているので、航空機や新幹線で
衝突事故を起こしても人身事故には至らない。勿論、こ
の場合、床や壁にも、この材料を用いる必要がある。丸
テーブルを造り、ナットを埋めれば極めて簡単に組み立
てる事が出来て便利である。本願の成形体は軽くて強度
があるので、掃除が楽に出来る。又、ヘッドレストも同
じで、この方法は種々利用できると思われる。By embedding a bolt or a nut in the center of the molded body, the molded body can be easily fixed to another object. For example, a chair is molded, a nut is embedded in the molded body, a bolt is attached to the vehicle body, and the chair is attached to the vehicle body with the bolt and the nut. Since the chair of the present application is made of only the plastic skin and the foam, even if a collision accident occurs on an aircraft or a bullet train, it does not lead to personal injury. Of course, in this case, it is necessary to use this material also for floors and walls. If a round table is made and nuts are filled, it can be assembled very easily and is convenient. Since the molded article of the present invention is light and strong, it can be easily cleaned. Also, the headrest is the same, and this method can be used in various ways.
【0028】海中に有る鉄パイプのように海水の干満に
より乾いたり濡れたりする部分のパイプは極めて錆び易
い。その上、この部分は船舶により損傷される事も多
い。本願の方法で、鉄パイプの外径と同じ内径の長尺半
円筒体を造り、この内面に例えばブチルゴムのシール材
を載せ、これを鉄パイプに二つ合わせで被せ、水中にあ
る一端のパイプの外側から圧力をかけ、鉄パイプの上に
ある海水をシール材で上部に追い出し、次いで次ぎの部
分に、順次圧力をかけ、他の一端迄これを繰り返すと、
海水や空気は上部に追い出されて殆ど無くなる。これ以
後このパイプは錆びなくなる。これは本願の成形体が弾
性が有るため、ブチルゴムシール材で均一な圧力を掛け
る事が出来、海水と酸素が鉄パイプの表面から無くなる
為である勿論、このカバーを施工前に被覆しておいて施
工する事も出来る。本発明の方法で4側面に凹凸のある
長尺の板状体を造り、これを円形に曲げて結合し、これ
に次の長尺体を結合しながら曲げて結合し、これを繰り
返して円筒形の結合体を造れる。この円筒体は上部及び
下部にも凹凸があり、これを利用して底及び蓋を造って
容器とする事もできる。本願の成形体は平滑な表皮と弾
性の良いコアとで成り成形性が良いので、これを結合す
るだけで丈夫な結合体となり、水漏れが無い。この接触
部にシール材や接着剤を用いる事もあるが、通常は用い
ない。この円筒体は円筒の容器になり、半円筒に繋いだ
半円筒体はトンネルの防水壁ともなる。次いで、本発明
の実施例を記す。 [実施例1]A portion of a pipe that dries or gets wet due to the ebb and flow of seawater, such as an iron pipe in the sea, is extremely rust easily. Moreover, this part is often damaged by ships. By the method of the present application, a long semi-cylindrical body having the same inner diameter as the outer diameter of the iron pipe is made, a sealing material of butyl rubber, for example, is placed on the inner surface thereof, two of these are put on the iron pipe, and one end of the pipe in the water is placed in the water. Pressure from the outside of the steel pipe, the seawater on the iron pipe is expelled to the top with a sealing material, then pressure is applied to the next part sequentially, and this is repeated until the other end,
Seawater and air are forced to the top and almost disappear. After this, the pipe will not rust. This is because the molded body of the present application has elasticity, so that a uniform pressure can be applied with the butyl rubber sealing material, and seawater and oxygen disappear from the surface of the iron pipe. It can also be constructed. According to the method of the present invention, a long plate-like body having irregularities on four sides is formed, and this is bent and joined into a circular shape. You can make a combination of shapes. This cylindrical body also has irregularities on the upper and lower parts, and it is possible to make a bottom and a lid using this to make a container. Since the molded article of the present application is composed of a smooth skin and a core having good elasticity and has good moldability, it is possible to form a strong joint simply by joining it, and there is no water leakage. Although a sealing material or an adhesive may be used for the contact portion, it is not usually used. This cylindrical body becomes a cylindrical container, and the half-cylindrical body connected to the half-cylinder also serves as a waterproof wall of the tunnel. Next, examples of the present invention will be described. [Example 1]
【0029】高密度ポリエチレン、密度0.96g/c
c,190℃に於ける角周波数1(rad/s)の貯蔵
弾性率1×104(Pa)の粉末と、低密度ポリエチレ
ン、密度0.92g/cc,MI1.5にジクミルパー
オキサイド0.8PHR,アゾジカーボンアミド15P
HRを混練して一辺5mmの立方体にした材料を、第1
表に示す量を内法200×20025mmの金型(肉厚
5mm)に入れた。この金型は底面の中央に直径5mm
の孔があり、これにテフロンチューブを取り付け、その
金型内の先端をテフロンシートに小孔を空けたもので覆
い、一端を金型の略中央に位置せしめ、他の一端は外に
出した。これを二軸回転の熱風加熱成形機で230℃で
30分加熱した。回転速度は一方が10rpm,他方が
5rpmであった。取り出した金型の温度は200℃
で、これを水中で急冷して成形体を取り出した。得られ
た成形体は表面平滑な金型の形通りの第1図のような成
形体で、バリが出ず、表皮と発泡体とが画然と分かれ、
発泡相は二層の粒状体で成り発泡相と表皮が良く接着し
ていて、その性質は第1表の通りで、断熱性、耐吸湿
性、機械的強度に優れ、時間の経過で収縮しないもので
あった。尚、水分吸収量は成形体を90℃の温水に90
日間浸漬して後、重量の増加を測定した。High density polyethylene, density 0.96 g / c
c, a powder having a storage elastic modulus of 1 × 10 4 (Pa) at an angular frequency of 1 (rad / s) at 190 ° C., a low-density polyethylene, a density of 0.92 g / cc, and a dicumyl peroxide of MI1.5. .8PHR, azodicarbonamide 15P
HR was kneaded into a cube with a side of 5 mm.
The amount shown in the table was put into a mold (wall thickness 5 mm) of 200 × 20025 mm in inner method. This mold has a diameter of 5mm at the center of the bottom.
There was a hole, a Teflon tube was attached to this, the tip inside the mold was covered with a small hole in the Teflon sheet, one end was positioned substantially in the center of the mold, and the other end was out. . This was heated at 230 ° C. for 30 minutes using a biaxially rotating hot air heating molding machine. The rotation speed was 10 rpm for one and 5 rpm for the other. The temperature of the removed mold is 200 ° C
Then, this was quenched in water and a molded body was taken out. The obtained molded body is a molded body as shown in FIG. 1 according to the shape of a mold having a smooth surface, without burrs, the skin and the foam are clearly separated,
The foaming phase is composed of two layers of granular material, and the foaming phase and the skin are well adhered to each other. The properties are as shown in Table 1. It is excellent in heat insulation, moisture absorption resistance, mechanical strength, and does not shrink over time. Was something. The amount of water absorption was determined by heating the molded body to 90 ° C
After soaking for days, the increase in weight was measured.
【第1表】 [実施例2][Table 1] [Example 2]
【0030】実施例1のNo2に於て、高密度ポリエチ
レンの粉末の代わりに低密度ポリエチレンにジクミルパ
ーオキサイド0.5PHR,架橋助剤トリメチロールプ
ロパントリアクリレート0.5PHR,アゾジカーボン
アミド1.0PHR,発泡助剤ステアリン酸亜鉛0.1
PHRを混練して1辺1.0mmの立方体にした細粒を
100g,実施例1の発泡コンパウンド35gを加え、
実施例1と同じように回転成形した。得られた成形体は
第2図のように、表皮も発泡していて、その密度0.6
5g/cc,表皮厚さ2.9mm,表皮の最小厚さ2.
4mm,発泡体密度0.033g/cc,気泡径0.4
mmで、成形体の熱伝導率は0.28Kcal/mh℃
で、水分吸収率は0.01%でボイドが無く、表皮と発
泡体とが強固に接着していて断熱性が極めて良好なもの
であった。 [実施例3]In No. 2 of Example 1, 0.5 PHR of dicumyl peroxide, 0.5 PHR of trimethylolpropane triacrylate, and azodicarbonamide were added to low-density polyethylene instead of high-density polyethylene powder. 0PHR, foaming aid zinc stearate 0.1
100 g of the fine granules obtained by kneading the PHR into a cube having a side of 1.0 mm and 35 g of the foaming compound of Example 1 were added.
Rotational molding was performed in the same manner as in Example 1. As shown in FIG. 2, the obtained molded body had a foamed skin, and had a density of 0.6.
5 g / cc, skin thickness 2.9 mm, minimum skin thickness 2.
4mm, foam density 0.033g / cc, cell diameter 0.4
mm, the thermal conductivity of the molded body is 0.28 Kcal / mh ° C.
The water absorption rate was 0.01% and there was no void. The skin and the foam were firmly adhered to each other, and the heat insulating property was extremely good. [Example 3]
【0031】実施例2の表皮用細粒を75gにし、この
代わりに実施例1の高密度ポリエチレンの粉末50gを
入れ、これを実施例1と同じように回転成形した。得ら
れた成形体の表皮厚さは2.4mmで、最小厚さ2.0
mm,発泡体密度0.033g/cc,発泡体の気泡径
0.4mm,熱伝導率0.36Kcal/mh℃,吸水
率0.01%、コアにボイドも歪みも無く、表皮は発泡
していて、その上に発泡していない表皮との2相で成
り、第3図のような成形体で、断熱性が良好で表面が平
滑,美麗なものであった。 [実施例4]The fine granules for the skin of Example 2 were weighed to 75 g, and instead, 50 g of the high-density polyethylene powder of Example 1 was charged, and this was rotationally molded in the same manner as in Example 1. The skin thickness of the obtained molded body is 2.4 mm, and the minimum thickness is 2.0 mm.
mm, foam density 0.033 g / cc, foam cell diameter 0.4 mm, thermal conductivity 0.36 Kcal / mh ° C, water absorption 0.01%, no voids and distortion in the core, and the skin is foamed The molded body as shown in FIG. 3 was composed of two phases with an unfoamed skin, and had good heat insulating properties, a smooth and beautiful surface. [Example 4]
【0032】2000×1000×500mmの成形体
を造る金型の2000×500mmの側面の中央に16
00×100×50mmの凸部を造り、反対側の側面に
同じ寸法の凹部を造った。この金型に実施例1の粉末プ
ラスチック21Kgと発泡コンパウンド15Kgとを入
れ、同じ回転条件、温度で成形した。取り出した金型の
表面温度は205℃で、出来上がった成形体は金型通り
の形で、使用した材料が少ないので、表皮3mm,発泡
体の相約100mm、成形体の中央部分に約1800×
800×300の中空部分があり、強度、浮力があり、
水上で転覆する事は全く無く、凹凸を利用して連結出来
る浮き桟橋として、好適なものであった。この成形体の
凸部も凹部も表皮と発泡体とで成る為、極めて丈夫に結
合し、結合したものは容易に外れない物であった。只、
万一を考えて成形体にはボルトを埋め込み、これを針金
等で繋げる構造にした。 [実施例5]In the center of the 2000 × 500 mm side of a mold for forming a molded body of 2000 × 1000 × 500 mm,
A projection of 00 × 100 × 50 mm was made and a recess of the same dimensions was made on the opposite side. 21 Kg of the powdered plastic of Example 1 and 15 Kg of the foaming compound were placed in this mold and molded under the same rotation conditions and temperature. The surface temperature of the removed mold was 205 ° C., and the completed molded body was in the shape of the mold, and the material used was small. Therefore, the skin was 3 mm, the phase of the foam was about 100 mm, and the center of the molded body was about 1800 ×
There is a 800 x 300 hollow part, there is strength, buoyancy,
It was never overturned on the water, and was suitable as a floating pier that could be connected using unevenness. Since both the convex portion and the concave portion of the molded body were made of the skin and the foam, they were extremely strongly bonded, and the bonded product was not easily removed. only,
As a precautionary measure, a bolt was embedded in the molded body, and this was connected with a wire or the like. [Example 5]
【0033】実施例1の発泡コンパウンドを直径4mm
のロッドに押し出し、この上に実施例2の低密度発泡コ
ンパウンド2mmの厚さに被覆し、これを長さ8mmに
切断した。このコンパウンドと実施例1の表皮材を50
0×500×25mmの金型に入れて実施例1と同じ条
件で加熱発泡させた。得られた発泡複合体は第5図のよ
うでコア中に発泡倍率2倍の区画が縦横にあり、その厚
さは約3mmで発泡粒が二段に並んでいて、区画と区画
の間隔は約30mmで圧縮強度、衝撃強度が極めて良好
な断熱性床材でハイヒールを履いた人が歩ける丈夫な物
であった。 [実施例6]The foamed compound of Example 1 was 4 mm in diameter.
, And was coated thereon with the low-density foaming compound of Example 2 to a thickness of 2 mm, which was cut into a length of 8 mm. 50 parts of the compound and the skin material of Example 1 were used.
It was placed in a 0 × 500 × 25 mm mold and heated and foamed under the same conditions as in Example 1. As shown in FIG. 5, the obtained foamed composite has vertical and horizontal sections with a double expansion ratio in the core, a thickness of about 3 mm, and foamed particles arranged in two stages. It was a durable thing that a person wearing high heels could walk on with a heat insulating flooring material of about 30 mm and having extremely good compression strength and impact strength. [Example 6]
【0034】2000×1000×50mmの大きさ
で、2000×50mmの面に2000×20×10m
mの凹と凸があり、はめ込み出来る成形体用の金型に、
実施例1の粉末プラスチック21Kgと発泡コンパウン
ド29Kgを入れ、これにゴムの粒状体(平均粒径約1
0mm)50Kgを入れ、実施例4と同じように回転成
形した。得られた成形体は第6図のような成形体で、丈
夫で自立性があり衝撃を受けても壊れず、衝撃吸収性と
耐候性が良好で、ぶつかっても人に怪我をさせず施工が
簡単で単に押さえ板に上、下を留めれば良く、野球場の
フエンスとして最適なものであった。 [実施例7]The size is 2000 × 1000 × 50 mm, and 2000 × 20 × 10 m
There are concave and convex m
21 kg of the powdered plastic of Example 1 and 29 kg of the foaming compound were added thereto, and a rubber particle (with an average particle diameter of about 1) was added thereto.
(0 mm), and 50 Kg was added thereto, followed by rotational molding in the same manner as in Example 4. The obtained molded body is a molded body as shown in Fig. 6, which is durable, self-supporting, does not break even when subjected to impact, has good shock absorption and weather resistance, and is constructed without causing injury to people even if it hits However, it was easy to simply hold the upper and lower parts to the holding plate, and it was the best one for a baseball stadium. [Example 7]
【0035】2000×1000×200mmの金型に
実施例2の表皮用発泡コンパウンド26Kgとコア用発
泡コンパウンド11.5Kgとを入れ、実施例1と同じ
ように回転成形した。得られた成形体は表皮は厚さ0.
5mm,密度0.5g/ccで,発泡体の厚さは約50
mm,密度0.05g/ccで、中央には約1800×
800×100mmの中空部があり、丈夫でクッション
性,断熱性が良く、水洗いが出来、繰り返し消毒が可能
で感染防止用の病院のマットレスとして良好なものであ
った。 [実施例8]26 kg of the foaming compound for the skin of Example 2 and 11.5 kg of the foaming compound for the core of Example 2 were placed in a 2000 × 1000 × 200 mm mold, and were rotationally molded in the same manner as in Example 1. The obtained molded body had a skin thickness of 0.
5mm, density 0.5g / cc, foam thickness is about 50
mm, density 0.05g / cc, about 1800x in the center
It had a hollow part of 800 x 100 mm, was durable, had good cushioning and heat insulating properties, could be washed with water, could be repeatedly disinfected, and was good as a hospital mattress for infection prevention. Example 8
【0036】鉄のアングルを組み立てて箱状にし、これ
に1050×1000×50mmの発泡複合体の板4枚
を用いて1000×1000×1000mmの空間を造
った。これに1100×1100×50mm発泡複合体
の板を上蓋と底にして、板と板との接触する部分には全
て2mm厚さの架橋ポリエチレン発泡シート(発泡倍率
5倍)を置いてパッキングとし、アングルにネジ孔を開
けてボルトで発泡体の板に圧力を加え、パッキングを圧
縮して気密になる様にした。出来上がった断熱箱は水漏
れが無く、丈夫で断熱性に優れ、解体、組み立てが簡単
で繰り返し利用出来る物で活魚の運搬箱として好適なも
ので長期間使用しても断熱性の低下が無い物であった。 [実施例9]An iron angle was assembled into a box shape, and a 1000 × 1000 × 1000 mm space was formed using four 1050 × 1000 × 50 mm foam composite plates. In this, a 1100 × 1100 × 50 mm foam composite plate is used as a packing by placing a 2 mm thick crosslinked polyethylene foam sheet (expansion ratio 5 times) on all portions where the plate and the plate are in contact with each other, A screw hole was made in the angle, and pressure was applied to the foam plate with a bolt to compress the packing so as to be airtight. The finished heat insulation box has no water leakage, is durable, has excellent heat insulation, is easy to disassemble and assemble, and can be used repeatedly.It is suitable as a live fish transport box and does not deteriorate even after long-term use. Met. [Example 9]
【0037】1050×1000×50mmの発泡体の
板の1000の面の右側上下に表皮のある貫通する孔を
成形時に設け、この反対側左辺の1000×50mmの
面、及び上下の1050×50mmの面の両端に2個ず
つのナットが埋め込まれている板4枚を造り、それをボ
ルトで連結して4側面とし、1000×1000×10
00mmの空間を造った。この上下に1100×110
0×50mmの発泡板で面に8個の貫通する孔のある板
を底及び蓋として、ボルト止めして断熱箱を造った。こ
の箱は軽量で且つ丈夫で断熱性に優れ、解体,組み立て
が容易で、水洗いが出来、食品運搬用の断熱箱として極
めて便利なものであった。 [実施例10]Through-holes with skins are provided at the time of molding on the right and upper sides of the 1000 face of the foam plate of 1050 × 1000 × 50 mm, and the 1000 × 50 mm face on the opposite left side and the 1050 × 50 mm upper and lower faces are formed. Four plates with two nuts embedded at both ends of the surface are made and connected with bolts to form four sides, 1000 × 1000 × 10
A space of 00 mm was created. 1100 × 110 above and below
A heat insulating box was made by bolting a 0 × 50 mm foam plate having eight through holes on the surface as a bottom and a lid. This box was lightweight, durable and excellent in heat insulation, was easy to disassemble and assemble, could be washed with water, and was extremely useful as an insulation box for transporting food. [Example 10]
【0038】500×500×50mmの板で500×
50mmの隣接する2面に500×30×10mmの凸
部をつくり、残りの500×50mmの2面に同じ寸法
の凹部を設けた成形体を実施例1の粉末プラスチックと
発泡コンパウンドを用いて成形して表皮2mmで発泡体
密度0.03g/ccの発泡複合体を造った。この断熱
板は簡単にはめ込み出来、はめ合せただけで自立性があ
り、強固に結合されていて、容易に外れず、断熱性に優
れ冷凍倉庫の床材,壁材,天井材として良好なものであ
った。 [実施例11]A 500 × 500 × 50 mm plate is 500 ×
A molding having 500 × 30 × 10 mm protrusions formed on two adjacent surfaces of 50 mm and concave portions of the same dimensions provided on the remaining two surfaces of 500 × 50 mm was molded using the powdered plastic of Example 1 and a foaming compound. Thus, a foam composite having a foam density of 0.03 g / cc with a skin of 2 mm was produced. This insulation board can be easily fitted, is self-supporting just by fitting, is firmly connected, does not come off easily, has excellent heat insulation and is good as a floor material, wall material and ceiling material for a freezer warehouse. Met. [Example 11]
【0039】放射性廃棄物を入れ、ガラスで固めたステ
ンレスドラムより、径が200mm,高さが200mm
大きいドラムを表皮と発泡体(表皮厚さ5mm,発泡体
密度0.12g/cc,厚さ50mm)で成る成形体で
造った。この容器の底に100mm厚さのレンガ3枚を
置き、その上に放射性廃棄物のドラムを置き、容器とド
ラムの間隙を、常温では流動せず、100℃で流動する
ポリイソブチレンを満たした。そして、同じ発泡複合体
で出来た蓋を閉め、上部に間隙が全く無いように蓋に孔
を空けてポリイソブチレンを再注入した。この容器は表
皮材,発泡体,表皮材,ゴムの4層でステンレスドラム
を保護していて、衝撃を受けても壊れず、水が入る事は
全く無いもので、地下に格納すれば何年経っても錆びる
事は全く無く、例え衝撃を受けても壊れるのは最外装の
表皮だけで、内容物には変化を与えない物であった。 [実施例12]A stainless steel drum containing radioactive waste and hardened with glass has a diameter of 200 mm and a height of 200 mm.
A large drum was made of a compact consisting of skin and foam (skin thickness 5 mm, foam density 0.12 g / cc, thickness 50 mm). Three 100 mm-thick bricks were placed on the bottom of the container, and a radioactive waste drum was placed thereon. The gap between the container and the drum was filled with polyisobutylene which did not flow at room temperature but flowed at 100 ° C. Then, a lid made of the same foamed composite was closed, a hole was made in the lid so that there was no gap at the top, and polyisobutylene was injected again. This container protects the stainless steel drum with four layers of skin material, foam, skin material, and rubber. It does not break even if it receives an impact and does not enter water at all. It did not rust at all even after passing through, and even if it was subjected to an impact, only the outermost skin was broken, and the contents did not change. [Example 12]
【0040】径1000mm,長さ2000mmで肉厚
30mmの半円筒の発泡複合体(表皮3mm,発泡倍率
10倍,厚さ24mm)を造った。見掛け密度は0.1
4g/ccであった。この半円筒の長さ方向の両端の円
周に、厚さ10mm,長さ10mmの凸部と凹部を造っ
て、これで結合出来るようにし、両端の端と円周の端か
ら各25mm内に入った所に10mmのボルト4本埋
め、一部が出ている構造にした。そして、結合した後は
ボルトとボルトを針金で固定した。この半円筒の防油堤
を重りで半分沈め、水面が円筒の中心に来るように沖に
向かって凹にして設置した。この防油堤は、油がこの凹
部に溜まり、上からも下からも通り抜けられず、且つ、
油の回収が容易なもので、極めて優れた防油堤で二重に
使用する事は全く必要の無いものであった。 [実施例13]A semi-cylindrical foamed composite having a diameter of 1,000 mm, a length of 2,000 mm and a thickness of 30 mm (skin 3 mm, foaming ratio 10 times, thickness 24 mm) was produced. The apparent density is 0.1
It was 4 g / cc. Protrusions and recesses having a thickness of 10 mm and a length of 10 mm are formed on the circumference at both ends in the length direction of this half cylinder so that they can be connected with each other, and within 25 mm from both ends and the circumference end. Four 10 mm bolts were buried in the place where they entered, and the structure was partially exposed. After the connection, the bolts and bolts were fixed with wires. This semi-cylindrical oil dike was submerged halfway with a weight, and was placed concavely offshore so that the water surface was at the center of the cylinder. In this dike, oil accumulates in this concave part, cannot pass through from above and below, and
It was easy to recover oil, and it was not necessary to use it twice in an extremely excellent oil dike. Example 13
【0041】径300mm,長さ2000mmの発泡複
合体で成る半割りの円筒の両端にネジが切れている物を
造り、2本を合せると、このネジで順次繋げる構造にし
た。この円筒は表皮2mm,発泡が30倍の複合体で厚
さ46mmであり、ネジ止めするだけで気密になり、水
が入る事は全く無く、容易に外れず、断熱性が良好で、
丈夫で、取り付け及び取り外しが簡単で、温泉パイプと
して極めて便利なものであった。尚、このダクトを難燃
性にし、その上にブリキ等で外装すると更に難燃性にな
るが、外装と円筒との間に間隙を置いて設置すると、難
燃性は完全になった。 [実施例14]A half-cylinder made of a foamed composite having a diameter of 300 mm and a length of 2000 mm was made with a thread cut at both ends, and when two were combined, the structure was such that these screws were sequentially connected. This cylinder is a composite of 2 mm skin and 30 times foam and is 46 mm thick. It is airtight just by screwing, it does not enter water at all, it does not come off easily, it has good heat insulation,
It was strong, easy to install and remove, and extremely convenient as a hot spring pipe. When this duct was made to be flame-retardant, and it was covered with tinplate or the like, it became more flame-retardant. However, when the duct was installed with a gap between it and the cylinder, the flame-retardancy became complete. [Example 14]
【0042】高さ2000mm,幅700mm,奥行き
400mmの断熱タンクを表皮3mm、発泡体30倍、
発泡厚さ44mmで造った。容器と蓋とで成り、蓋は平
板の4隅に孔を設け、容器にボルトで止める構造とし、
上部に温水の流入口、底より10mm上がった所に温水
の取り出し口を造った。温水の流入口や取り出し口は3
mm厚さのプラスチックの表皮を付け、内径は25mm
にした。又、ヒーターをこの容器の下半分に付け、何時
でも使用出来る形にした。この断熱容器は軒下に置いて
も場所を取らず、簡単な構造で断熱性が良好なもので何
年使用しても断熱性が低下しないものであった。 [実施例15]A heat insulating tank having a height of 2,000 mm, a width of 700 mm and a depth of 400 mm is covered with a skin of 3 mm, a foam of 30 times,
It was made with a foam thickness of 44 mm. It consists of a container and a lid, and the lid has holes at the four corners of the flat plate and is bolted to the container.
A hot water inlet was provided at the top, and a hot water outlet was provided at a location 10 mm above the bottom. 3 hot water inlets and outlets
With a plastic skin of mm thickness, inner diameter is 25mm
I made it. A heater was attached to the lower half of this container so that it could be used at any time. This insulated container did not take up much space even when placed under the eaves, had a simple structure and had good heat insulating properties, and did not deteriorate even after years of use. [Example 15]
【0043】100mm厚さの発泡複合体(表皮2m
m,発泡倍率30倍,厚さ94mm)で腰掛部,背部,
両肘部が一体で成る椅子を造り、この腰掛部の下部の中
央にナットを埋め込んだ。この椅子は軽量で、クッショ
ン性,自立性があり、ナットを除いて発泡複合体で出来
ているので、航空機や新幹線等の乗物の椅子に使用する
と、事故の時、怪我人が出ないものであった。 [実施例16]A foam composite having a thickness of 100 mm (skin 2 m
m, foaming ratio 30 times, thickness 94mm)
He built a chair with both elbows integrated with a nut in the center of the lower part of the seat. This chair is lightweight, cushioning and self-supporting, and is made of a foam composite except for nuts, so if it is used in a chair for a vehicle such as an aircraft or a Shinkansen, no one will be hurt in the event of an accident. there were. [Example 16]
【0044】[実施例1]の方法で表皮厚さ2mm,発
泡体密度0.03g/ccの二人乗りのボートを本願の
方法で造った。このボートの重量は10kgで軽量で一
人で持ち運びが出来るもので、転覆しても沈む事が無
く、水中で一人の力で正常に戻せる物で、初心者用に極
めて好適なものであった。又、このボート,サーフイン
等には金具が取り付けられ、オール等が付けられるもの
であった。 [実施例17]A two-seater boat having a skin thickness of 2 mm and a foam density of 0.03 g / cc was produced by the method of the present invention by the method of [Example 1]. This boat weighed 10 kg, was lightweight and could be carried by one person, did not sink even when capsized, and could be returned to normal by one person in water, making it extremely suitable for beginners. Further, metal fittings are attached to the boat, surf-in and the like, and oars and the like are attached. [Example 17]
【0045】海中にある鉄パイプの海水の干満により乾
いたり、濡れたりする部分に、この鉄パイプの外径と同
じ内径の長尺半円筒体を本願の方法で造り、その上にブ
チルゴムシール材(厚さ5mm)を載せ、この2枚をパ
イプに被せ、水中にある成形体の一端の外側から円周全
部に圧力をかけ、パイプ上にある海水と空気とを上部に
追い出し、次いで、次の部分に順次圧力をかけ、他の一
端迄これを繰り返した。本作業により、パイプ上にあっ
た海水と空気はシール材により追い出され、それ以後こ
のパイプの錆は止まった。又、この成形体は丈夫で衝撃
吸収性があり、船舶が衝突しても、損傷しないものであ
った。 [実施例18]A long semi-cylindrical body having the same inner diameter as the outer diameter of the iron pipe is formed by the method of the present invention in a portion of the underwater iron pipe which is dried or wet by the ebb and flow of seawater, and a butyl rubber sealing material is further formed thereon. (Thickness: 5 mm), put the two pieces on a pipe, apply pressure to the entire circumference from the outside of one end of the molded body in water, expel seawater and air on the pipe to the top, and then Was sequentially applied to this part, and this was repeated until the other end. By this work, the seawater and air that had been on the pipe were expelled by the sealing material, after which the pipe rust stopped. The molded article was strong and shock-absorbing, so that it was not damaged even when the vessel collided. [Example 18]
【0046】[実施例1]の方法で4側面に凹凸があ
り、結合できる長尺板を造り、これを円形に曲げて両先
端を結合し、次いで、次の長尺体を先に曲げた物に結合
しながら曲げ、先端を結合し、これを繰り返して長い円
筒形とし、これに円周に凹と凸のある円盤を結合して底
と蓋にした。この成形体は水漏れが無く、断熱性,弾性
があり、一度結合すると外れないので、醸造用の容器と
して使用可能な物であった。又、この方法で造った半円
筒はトンネルの防水材として使用可能であった。 [実施例19]By the method of [Example 1], a long plate having irregularities on four sides and capable of being joined was produced, this was bent into a circular shape and both ends were joined, and then the next long body was bent first. The tip was joined while being joined to the object, and the tip was joined. This was repeated to form a long cylindrical shape, and a disk having a concave and a convex on the circumference was joined to the bottom and the lid. This molded article had no water leakage, had heat insulating properties and elasticity, and did not come off once bonded, so that it could be used as a container for brewing. Also, the half cylinder made by this method could be used as a waterproof material for a tunnel. [Example 19]
【0047】本願の方法で造った500×500×25
mmの発泡板状体の各辺の中央に300×25mmの凸
部を造った。(A) 590×300×25mmの発泡板状体で、300mm
の一方の辺に端から20mm離れて上,下の中央に20
0×25mmの孔を造り、300mmの辺の他の一辺は
上,下から50×50mm欠損させて、中央に200×
25mmの凸部を造り、下辺は端から20mm離れて中
央に300×25mmの孔を造った。(B)AとBの凸
部は、先端に行くほど少し狭くなっていて、孔に入れ易
くし、孔に入り切った所に段差が有り、結合すると簡単
には外れない構造にした。Aの各辺にBをはめ、Bの凸
部と孔とを夫々結合すると500×500×300mm
の箱となり、この箱は強度と断熱性が有り、簡単に組立
て,解体が出来る。往きは魚を入れて箱として使用し、
帰りは板にして持ち帰れるもので、魚箱として極めて好
ましい物であった。500 × 500 × 25 manufactured by the method of the present application
A 300 × 25 mm projection was formed at the center of each side of the foamed plate having a thickness of mm. (A) 590 x 300 x 25 mm foamed plate, 300 mm
20mm away from the edge on one side
A hole of 0x25mm was made, and the other side of 300mm was cut off 50x50mm from the top and bottom, and 200x in the center.
A 25 mm convex portion was formed, and a 300 × 25 mm hole was formed in the center of the lower side at a distance of 20 mm from the end. (B) The convex portions of A and B are slightly narrower toward the tip, so that they can be easily inserted into the hole, and there is a step at the position where the hole has been completely inserted. When B is fitted on each side of A and the protrusions and holes of B are respectively connected, 500 × 500 × 300 mm
This box has strength and heat insulation, and can be easily assembled and disassembled. For the trip, put the fish and use it as a box,
The return can be brought back on a plate, which is extremely preferable as a fish box.
【0047】[発明の効果]以上説明した如く、肉厚の
厚い金型を使用し、粉末プラスチックとこれより形の大
きい発泡性粒状体で、分解発熱性の発泡剤を5PHR以
上と架橋剤を含むコンパウンドを,金型の容積の15%
以上空隙が有るように入れ、これを遠心力を与えないよ
うに二軸回転しながら外部より均一に加熱して、均一な
厚さの表皮を生成し、この表皮の上に発泡粒状体を一層
に均等に付着させて、金型の温度,表皮材の温度を発泡
剤の分解温度にして一斉に発泡させて、次いで、急冷す
る。この製造方法に依り表皮と発泡体とで成る成形体が
一工程で製造でき、この成形体は軽量で強度が有り、断
熱性に優れ、吸湿して断熱性が低下する事が無く、クッ
ション性が有るので極めて有用なものでる。[Effects of the Invention] As described above, a thick plastic mold is used, and powdered plastic and foamable granules larger than this are used. 15% of mold volume including compound
Heat it evenly from the outside while rotating it biaxially so as not to apply centrifugal force to generate a skin with a uniform thickness, and form a foamed granular material on this skin. The temperature of the mold and the temperature of the skin material are set to the decomposition temperature of the foaming agent, and the foam is blown all at once, and then rapidly cooled. According to this production method, a molded body composed of a skin and a foam can be produced in one step, and the molded body is lightweight, strong, has excellent heat insulating properties, does not absorb moisture to reduce heat insulating properties, and has cushioning properties. Is very useful because
【図1】表皮と発泡体の断熱材Fig. 1 Skin and foam insulation
【図2】発泡表皮と発泡体の断熱材Fig. 2 Foam skin and foam insulation
【図3】表皮と発泡表皮と発泡体の断熱材FIG. 3 Insulation material of skin, foam skin and foam
【図4】表皮と発泡体と中空部で成る断熱材FIG. 4 is a heat insulating material comprising a skin, a foam, and a hollow portion.
【図5】表皮と発泡体と区画で成る断熱材FIG. 5: Insulation material consisting of skin, foam and compartment
【図6】表皮と発泡体とゴム、プラスチックの粒状体で
成る断熱材FIG. 6 is a thermal insulator made of a granular material of skin, foam, rubber, and plastic.
(1) 表皮 (2) 発泡体 (3) 発泡表皮 (4) 中空 (5) 区画 (6) ゴム、プラスチック粒状体 (1) Skin (2) Foam (3) Foamed skin (4) Hollow (5) Compartment (6) Rubber and plastic granules
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) // B29C 44/00 B29C 67/22 B29K 105:04 105:24 Fターム(参考) 4F074 AA05 AA16 AA18 AA20 AA97 AA98 AC02 AC06 AE01 AE04 AG01 AG06 AG10 AG12 BA01 BA13 BA28 BB02 BB25 BB27 CA28 CC04X CC04Y CC05Z CC06Y CC30W CC32Y CC33W CC43 CC44 CC46 CC47 CC62 CD07 DA02 DA03 DA07 DA08 DA23 DA32 DA33 DA34 DA42 4F204 AA03 AA05 AA50 AB01 AB02 AB03 AB05 AB11 AB12 AB18 AB25 AC01 AC04 AD03 AD05 AD16 AG03 AG07 AG20 AH17 AH59 AR06 FB01 FB11 FB22 FF01 FF05 FF06 FN12 FN15 FQ15 4F212 AA03 AA04 AA50 AB01 AB02 AB03 AB05 AB11 AB12 AB18 AB25 AC04 AG03 AG05 AG20 AG23 AG28 AH47 AH56 AJ02 UA01 UB01 UB30 UC06 UF47 UH06 UH16 UN05 UN06 UN08 4J002 AA00W AA01W AA02W BB00X BB03W BB03X DA038 EK007 EK037 EQ016 FA048 FD018 FD099 FD139 FD147 FD159 FD189 FD326 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) // B29C 44/00 B29C 67/22 B29K 105: 04 105: 24 F term (reference) 4F074 AA05 AA16 AA18 AA20 AA97 AA98 AC02 AC06 AE01 AE04 AG01 AG06 AG10 AG12 BA01 BA13 BA28 BB02 BB25 BB27 CA28 CC04X CC04Y CC05Z CC06Y CC30W CC32Y CC33W CC43 CC44 CC46 CC47 CC62 CD07 DA02 DA03 DA07 DA08 DA23 DA32 DA33 DA34 DA05 A03 AB03 AB03 AB03 AB03 AB25 AC01 AC04 AD03 AD05 AD16 AG03 AG07 AG20 AH17 AH59 AR06 FB01 FB11 FB22 FF01 FF05 FF06 FN12 FN15 FQ15 4F212 AA03 AA04 AA50 AB01 AB02 AB03 AB05 AB11 AB12 AB18 AB25 AC04 AG03 AG05 AG20 AG23 AG28 AH07 AUH UAH UN06 UN08 4J002 AA00W AA01W AA02W BB00X BB03W BB03X DA038 EK007 EK037 EQ016 FA048 FD018 FD099 FD139 FD147 FD159 FD189 FD326
Claims (45)
性の発泡剤を配合したポリオレフィンの架橋発泡性粒状
体とを、材料が金型内で動けるように入れ、回転しなが
ら加熱して、表皮を造り、その表皮の上に発泡性粒状体
を付着させ、更に加熱して金型の温度、次いで表皮の温
度を発泡剤の分解温度にし、発泡剤を分解膨張せしめて
多面体気泡の発泡体にし、次いで冷却する事を特徴とす
る発泡複合体の製造方法。1. A plastic powder or fine granules and a crosslinked foamable polyolefin granule containing a decomposing and exothermic foaming agent are put into a mold so that the material can move, and heated while rotating, A skin is made, a foamable granule is adhered on the skin, and further heated to a mold temperature and then a skin temperature to a decomposition temperature of a foaming agent, and the foaming agent is decomposed and expanded to form a polyhedral foam. And then cooling the mixture.
性の発泡剤を配合したポリオレフィンの架橋発泡性で該
粉末又は該細粒より大きい粒状体とを、材料が金型内で
動けるように厚肉の金型に入れ、回転しながら均一に加
熱して、均一な厚さの表皮を造り、その表皮の上に発泡
性粒状体を均等に分布付着させ、更に加熱して、金型の
温度、次いで表皮の温度を発泡剤の分解温度にし、発泡
剤を一斉に分解膨張せしめて多面体気泡の発泡体にし、
金型に充填せしめ、次いで冷却する事を特徴とする発泡
複合体の製造方法。2. A method according to claim 1, wherein a plastic powder or fine granules and a crosslinked foamable polyolefin blended with a decomposing and exothermic blowing agent are mixed with the powder or fine granules so that the material can move in a mold. Put it in a thick mold, heat it evenly while rotating, make a skin of uniform thickness, distribute and adhere the expandable granules evenly on the skin, and further heat it, The temperature and then the temperature of the epidermis are set to the decomposition temperature of the foaming agent, and the foaming agent is simultaneously decomposed and expanded to form a polyhedral foam,
A method for producing a foamed composite, comprising filling in a mold and then cooling.
して熱可塑性樹脂の粉末又は熱硬化性樹脂の完全硬化に
至らない粉末を用いる方法。3. The method according to claim 1, wherein a thermoplastic resin powder or a powder that does not completely cure the thermosetting resin is used as the plastic powder.
して、ポリオレフインに有機過酸化物と発泡剤とを配合
した粒状体、又はポリオレフインに発泡剤を配合し、こ
れに電離性放射線を照射した粒状体を用いる方法。4. The method according to claim 1, wherein the crosslinked expandable granules are a mixture of polyolefin and an organic peroxide and a foaming agent, or a mixture of polyolefin and a foaming agent. A method using a granular material irradiated with radiation.
0.2乃至1.2PHRの有機過酸化物と5乃至40P
HRの発泡剤を混合した架橋発泡性粒状体を用いる方
法。5. The polyolefin according to claim 1, wherein the polyolefin is 0.2 to 1.2 PHR of an organic peroxide and 5 to 40 P
A method using a crosslinked expandable granule mixed with an HR blowing agent.
剤を用いる方法。6. The method according to claim 1, wherein a crosslinking aid is used together with a crosslinking agent.
剤を用いる方法。7. The method according to claim 1, wherein a foaming aid is used together with a foaming agent.
合物の見掛けの体積が、金型の容積の85%以下である
方法。8. The method according to claim 1, wherein the apparent volume of the material mixture to be placed in the mold is not more than 85% of the volume of the mold.
を表皮層の上に一層に付着させ、これを発泡させて、発
泡した粒状体が一層又は二層でなる発泡複合体を製造す
る方法。10. The foamed composite according to claim 1, wherein the crosslinked foamable granules are adhered on the skin layer in a single layer and foamed, and the foamed granules are formed in one or two layers. How to manufacture.
として、190℃に於ける角周波数1(rad/s)の
貯蔵弾性率が1×103(Pa)以上の物を用いる方
法。11. A method according to claim 1, wherein the powdered plastic has a storage elastic modulus of 1 × 10 3 (Pa) or more at an angular frequency of 1 (rad / s) at 190 ° C.
の厚さの鉄板又はそれと同等以上の強度と熱容量のある
金属体を用いる方法。12. The method according to claim 1, wherein a metal plate having a thickness of 4 mm or more or a metal body having strength and heat capacity equivalent to or more than that is used for the mold.
を溶接して造った金型を使用する方法。13. A method according to claim 1, wherein a metal mold made by welding an iron plate of 5 mm or more is used.
熱流入量を多くして、出来上がった成形体の表皮材の中
側の角にRをつける発泡複合体の製造方法。14. A method of manufacturing a foamed composite according to claim 1, wherein the amount of heat flowing into the corners of the mold is increased so as to add a radius to the middle corner of the skin material of the completed molded body. Method.
個の小孔をあけ、これにパイプを取り付け、一端を金型
の中央に入れ、他端を外に出し、金型よりガス抜きする
発泡複合体の製造方法。15. The method according to claim 1, wherein one or several small holes are made in the mold, a pipe is attached to the small hole, one end is placed in the center of the mold, and the other end is taken out. A method for producing a foamed composite in which gas is released from a mold.
風、直火、蒸気、及び金型に密着した金属パイプに通し
た油に依ってする発泡複合体の製造方法。16. The method for producing a foamed composite according to claim 1, wherein the mold is heated by hot air, an open flame, steam, and oil passed through a metal pipe in close contact with the mold.
回転又は揺動回転で行ない、回転速度を1乃至20rp
mにする方法。17. The method according to claim 1, wherein the rotation of the mold is performed by biaxial rotation or swing rotation, and the rotation speed is 1 to 20 rpm.
How to make m.
0乃至230℃にして発泡させ、表皮と発泡体の接着力
を、発泡体の強度以上にする成形方法。18. The method according to claim 1, wherein the temperature of the mold is 17
A molding method in which foaming is performed at 0 to 230 ° C. so that the adhesive strength between the skin and the foam is equal to or higher than the strength of the foam.
材に0.1乃至2PHRの発泡剤を混合して成形し、球
形気泡に発泡した表皮の成形体を製造する方法。19. The method according to claim 1, wherein a foaming agent of 0.1 to 2 PHR is mixed with the plastic skin material and molded to produce a molded body of the foam foamed into spherical cells.
にフイラー、繊維、カーボンブラック、ステンレスワイ
ヤー、防黴剤、坑菌剤、顔料等を混合して成形し、これ
らの材料が表皮に入った成形体を製造する方法。20. The method according to claim 1, wherein a filler, a fiber, a carbon black, a stainless steel wire, a fungicide, an antibacterial agent, a pigment and the like are mixed with the plastic powder, and the mixture is molded. A method for producing a molded article containing the same.
種以上のプラスチック粉末又は細粒を用いて、二層又は
二層以上の表皮層を有する成形体を製造する方法。21. The method according to claim 1, wherein two or more plastic powders or fine particles having different sizes are used to produce a molded article having two layers or two or more skin layers.
一方又は双方にハロゲン系、又はノンハロゲン系の難燃
剤を入れ、難燃化した複合体を製造する方法。22. The method according to claim 1, wherein a halogen-based or non-halogen-based flame retardant is added to one or both of the skin material and the foam material to produce a flame-retardant composite.
一方又は双方にプラスチック廃棄物を用いる複合体の製
造方法。23. The method for producing a composite according to claim 1, wherein plastic waste is used for one or both of the skin material and the foam material.
クの廃棄物を用い、その上に廃棄物でない薄いプラスチ
ックの表皮を造る複合体の製造方法。24. The method for producing a composite according to claim 1, wherein plastic waste is used for the skin, and a thin plastic skin that is not a waste is formed thereon.
下で、発泡体の密度が0.1g/cc以下のクッション
性のある発泡複合体を製造する方法。25. The method according to claim 1, wherein the foamed composite has a cushioning property with a skin of 1 mm or less and a foam density of 0.1 g / cc or less.
を少量にし、金型の中央に金型と略相似形の気体相のあ
る発泡複合体を製造する方法。26. The method according to claim 1, wherein a small amount of material is placed in the mold, and a foamed composite having a gas phase substantially similar to the mold is formed at the center of the mold.
に、発泡しないか又は僅かに発泡する材料を被覆した材
料を用い、成形体内に発泡しないか又は僅かに発泡した
材料の区画のある発泡複合体を製造する方法。27. A section of a non-foamed or slightly foamed material according to claim 1, wherein the cross-linked foamed material is coated with a non-foamed or slightly foamed material. For producing a foamed composite having a texture.
状体と共に、この粒状体より大きいゴム,プラスチック
又はそれ等の複合材の粒子を加え、これを回転しながら
加熱して、これ等の粒子が成形体の中央にあり、これ等
を発泡体で固定した発泡複合体を製造する方法。28. The method according to claim 1, wherein particles of rubber, plastic, or a composite material such as rubber, plastic, or the like larger than the particles are added together with the powder and the particles to be foamed, and the particles are heated while rotating. A method for producing a foamed composite in which these particles are located at the center of the molded body and are fixed with a foam.
付け、金具の表面にも表皮を生成させた発泡複合体を製
造する方法。29. The method according to claim 1, wherein a metal fitting is attached to a mold, and a skin is also formed on the surface of the metal fitting to produce a foamed composite.
隅に表皮のある孔を設け、これを支持体にボルト止めす
る発泡複合体の施工方法。30. A method for constructing a foamed composite in which holes having skins are provided at four corners of a plate-like body produced by the method of claim 1, and the holes are bolted to a support.
に際し、発泡複合体の一方に凸部又は凸部の根本に段差
のある凸部をつくり、同じ成形体又は異なる成形体に同
じ寸法の凹部又は孔をつくり、結合する事を特徴とした
発泡複合体の結合方法。31. When producing a foamed composite according to the method of claim 1, a protruding portion or a protruding portion having a step at the root of the protruding portion is formed on one of the foamed composites to form the same or different molded products. A method of joining a foamed composite, wherein a recess or a hole having the same size is formed and joined.
円筒体で両端に雄ネジと雌ネジのある成形体を造り、こ
れをネジ結合する長尺発泡複合体の連結方法。32. A method of connecting a long foam composite, comprising forming a long semi-cylindrical body or a cylindrical body having a male screw and a female screw at both ends by the method of [1], and screwing the formed body.
し、一部の表皮を厚くした発泡複合体の製造方法。33. A method for producing a foamed composite in which a part of the skin is made thinner and a part of the skin is made thicker by the method of [1].
し、一部のコアを厚くした発泡複合体の製造方法。34. A method for producing a foamed composite in which a part of the core is thinned and a part of the core is thickened by the method of claim 1.
み、ボルト孔を設けた発泡複合板状体を造り、これを組
み立てる組立体の製造方法。35. A method of manufacturing an assembly in which a nut is embedded and a foamed composite plate having bolt holes is formed by the method of claim 1, and this is assembled.
際し、その略中央にボルト又はナットを埋め込み、この
ボルト又はナットで他物に結合する発泡複合体の製造方
法。36. A method for producing a foamed composite in which a bolt or a nut is buried substantially in the center of a molded article according to the method of claim 1 and the bolt or the nut is joined to another object.
に際し、直角の孔を設け、この孔の表面に表皮を造り、
この表皮を成形体の表皮と発泡体に融着させた発泡複合
体の製造方法。37. In producing a plate of a molded article by the method of claim 1, a right-angled hole is provided, and a skin is formed on the surface of the hole.
A method for producing a foamed composite in which the skin is fused to the skin of the molded body and the foam.
れを組み立てた組立体に於て、板と板との接触部にゴム
又は発泡プラスチックのパッキングを用い、圧力を加え
て組み立てる発泡複合組立体の製造方法。38. A plate-like body is produced by the method of [1], and in an assembly obtained by assembling the plate-like body, pressure is applied by using packing of rubber or foamed plastic at a contact portion between the plates. Manufacturing method of foam composite assembly to be assembled.
レンの表皮と、密度が0.1g/cc以下の発泡体で成
る成形体を造り、車が衝突しても壊れず、火災を発生し
ない発泡複合体で成るガソリンタンクの製造方法。39. The method according to claim 1, wherein a molded body made of a high-density polyethylene skin and a foam having a density of 0.1 g / cc or less is produced, and is not broken even if a car collides. A method for producing a gasoline tank made of a foamed composite that does not generate.
容器に防錆する物体を入れ、防錆する物体と容器との間
に加熱すると流動するが、室温では流動しないゴム又は
油を入れ蓋をする防錆方法。40. A rubber composite or oil which flows when heated between the container and the object to be rusted, but which does not flow at room temperature. Put the lid on to prevent rust.
両端が結合できる成形体を造り、これを連結し、重りを
付けて半分を沈め、半分を浮かせ、沖に対して凹面を向
ける油の遮断方法。41. A long semi-cylindrical body according to the method of claim 1,
A method of blocking oil that creates a molded body that can be joined at both ends, connects them, attaches a weight, sinks half, floats half, and turns concave to offshore.
チックフイルム,プラスチック複合フイルム,薄い金属
板,金属箔等の薄物体を接着して成形し、表面にこれ等
の薄物が付着した発泡成形体を製造する方法。42. A method according to claim 1, wherein a thin object such as a plastic film, a plastic composite film, a thin metal plate, a metal foil or the like is adhered and molded in a mold, and these thin objects adhere to the surface. A method for producing a foamed molded article.
造り、その内面にシール材をのせ、この二つを海水の干
満で濡れたり乾いたりする部分のパイプに被せ、長尺半
円筒体の外部より圧力をかけて、シール材でパイプ面を
覆う事を特徴とする金属パイプの防蝕方法。43. A long semi-cylindrical body is produced by the method of [1], a sealing material is placed on the inner surface thereof, and these two are put on a pipe which is wet or dry by the ebb and flow of seawater. A method for preventing corrosion of a metal pipe, wherein pressure is applied from outside the half-cylinder to cover the pipe surface with a sealing material.
凸のある板を曲げて、円筒状又は一部が欠けた円筒状に
して、次の板を結合しながら丸めて同じように接続し、
これを繰り返す円筒状体又は一部が欠けた円筒状体の製
造方法。44. A plate having four irregularities on the four sides formed by the method of claim 1 is bent into a cylindrical shape or a partially chipped cylindrical shape, and the next plate is rounded while being joined. Connect to
A method for producing a cylindrical body that repeats this or a cylindrical body that is partially missing.
で表皮が1乃至4mmで、発泡体の密度が0.02乃至
0.14g/ccで、水上で転覆しても一人で容易に直
せるボート,サーフイン等の人の浮揚材。45. The foam composite produced by the method of claim 1 having a skin of 1 to 4 mm, a density of the foam of 0.02 to 0.14 g / cc, and even if it is overturned on water alone. Elevating material for people such as boats and surf-ins that can be easily fixed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11221551A JP2001009857A (en) | 1999-07-01 | 1999-07-01 | Manufacture of plastic foam composite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11221551A JP2001009857A (en) | 1999-07-01 | 1999-07-01 | Manufacture of plastic foam composite |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001009857A true JP2001009857A (en) | 2001-01-16 |
Family
ID=16768502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11221551A Pending JP2001009857A (en) | 1999-07-01 | 1999-07-01 | Manufacture of plastic foam composite |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2001009857A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003089219A1 (en) * | 2002-04-19 | 2003-10-30 | Shiina Kasei Co. | Method for producing plastic foamed composite |
WO2005037518A1 (en) * | 2003-10-17 | 2005-04-28 | Shiina Kasei Co. | Method for producing plastic foamed composite |
WO2006112394A1 (en) * | 2005-04-15 | 2006-10-26 | Shiina Kasei Co. | Plastic foam composite and process for producing the same |
JP2011522724A (en) * | 2008-06-09 | 2011-08-04 | スティールウェル ニコラス | Molding process for plastic products |
WO2017056351A1 (en) * | 2015-09-29 | 2017-04-06 | 豊田合成株式会社 | Member with surface layer and method for producing same |
CN107498931A (en) * | 2017-09-14 | 2017-12-22 | 浙江镇石物流有限公司 | A kind of chemical products storage tank |
CN111655473A (en) * | 2018-04-18 | 2020-09-11 | 日本制铁株式会社 | Metal-carbon fiber reinforced resin material composite and method for producing metal-carbon fiber reinforced resin material composite |
CN114193770A (en) * | 2021-12-10 | 2022-03-18 | 深圳市宏昌盛精密塑胶模具有限公司 | Plastic product molding process |
CN115503174A (en) * | 2022-10-11 | 2022-12-23 | 东莞海瑞斯新材料科技有限公司 | Equipment and method for filling thermoplastic plastic polymer by adopting die pressing |
-
1999
- 1999-07-01 JP JP11221551A patent/JP2001009857A/en active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003089219A1 (en) * | 2002-04-19 | 2003-10-30 | Shiina Kasei Co. | Method for producing plastic foamed composite |
WO2005037518A1 (en) * | 2003-10-17 | 2005-04-28 | Shiina Kasei Co. | Method for producing plastic foamed composite |
JPWO2005037518A1 (en) * | 2003-10-17 | 2006-12-28 | 有限会社椎名化成 | Method for producing plastic foam composite |
US8147733B2 (en) | 2003-10-17 | 2012-04-03 | Shiina Kasei Co. | Process for producing plastic foam composite |
WO2006112394A1 (en) * | 2005-04-15 | 2006-10-26 | Shiina Kasei Co. | Plastic foam composite and process for producing the same |
JP2011522724A (en) * | 2008-06-09 | 2011-08-04 | スティールウェル ニコラス | Molding process for plastic products |
WO2017056351A1 (en) * | 2015-09-29 | 2017-04-06 | 豊田合成株式会社 | Member with surface layer and method for producing same |
CN107498931A (en) * | 2017-09-14 | 2017-12-22 | 浙江镇石物流有限公司 | A kind of chemical products storage tank |
CN111655473A (en) * | 2018-04-18 | 2020-09-11 | 日本制铁株式会社 | Metal-carbon fiber reinforced resin material composite and method for producing metal-carbon fiber reinforced resin material composite |
CN111655473B (en) * | 2018-04-18 | 2022-06-03 | 日本制铁株式会社 | Metal-carbon fiber reinforced resin material composite and method for producing metal-carbon fiber reinforced resin material composite |
CN114193770A (en) * | 2021-12-10 | 2022-03-18 | 深圳市宏昌盛精密塑胶模具有限公司 | Plastic product molding process |
CN115503174A (en) * | 2022-10-11 | 2022-12-23 | 东莞海瑞斯新材料科技有限公司 | Equipment and method for filling thermoplastic plastic polymer by adopting die pressing |
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