JP4623495B2 - Manufacturing method of plastic molding for pallets - Google Patents
Manufacturing method of plastic molding for pallets Download PDFInfo
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- JP4623495B2 JP4623495B2 JP2004235917A JP2004235917A JP4623495B2 JP 4623495 B2 JP4623495 B2 JP 4623495B2 JP 2004235917 A JP2004235917 A JP 2004235917A JP 2004235917 A JP2004235917 A JP 2004235917A JP 4623495 B2 JP4623495 B2 JP 4623495B2
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Description
本発明は、編織物や不織布等の繊維製品を原料として用いた、表面に凹凸模様が賦型されてなるパレット用プラスチック成型体の製造方法に関し、特に、生産工程で発生する繊維製品の屑を原料として、表面に凹凸模様が賦型されてなるパレット用プラスチック成型体を製造する方法に関するものである。また、このような方法で得られたパレット用プラスチック成型板、並びに、このプラスチック成型板を用いて組み立てたパレットに関するものである。 The present invention relates to a method for producing a plastic molded article for a pallet using a textile product such as a knitted fabric or nonwoven fabric as a raw material, and in particular, the waste of the textile product generated in the production process. The present invention relates to a method for producing a plastic molded article for pallets having a surface with a concavo-convex pattern as a raw material. The present invention also relates to a plastic molded plate for pallets obtained by such a method and a pallet assembled using this plastic molded plate.
本発明者等は、生産工程で発生する繊維製品の屑を原料としてプラスチック成型体を製造する方法を提案した。また、このプラスチック成型体をパレット用に用いることも提案した（特許文献１）。 The inventors of the present invention have proposed a method of manufacturing a plastic molded body using fiber product waste generated in the production process as a raw material. It has also been proposed to use this plastic molding for pallets (Patent Document 1).
本発明者等が提案したプラスチック成型体の製造方法は、以下のようなものである。すなわち、高融点成分と低融点成分とを含む繊維製品を加熱して、高融点成分は当初の繊維状態を実質的に維持させたまま、低融点成分を溶融させ、所定の型に成型した後、冷却することを特徴とするプラスチック成型体の製造方法というものである（特許文献１の請求項１）。具体的な方法としては、高融点成分と低融点成分とを含む繊維製品を、スクリュー式押出機に投入し、押出機内で所定の温度に加熱した後、押出機から押し出して、プラスチック成型板を得る方法（特許文献１の実施例１）、高融点成分と低融点成分とを含む繊維製品を、金型内に収納した後、所定の温度に加熱及び加圧して、プラスチック成型板を得る方法（特許文献１の実施例５）を提案した。このような方法によって、釘打ち及びネジ打ちの可能なプラスチック成型板を得ることができ、種々の用途に好適に用いられる。 The manufacturing method of the plastic molding which the present inventors proposed is as follows. That is, after heating a fiber product containing a high melting point component and a low melting point component, the high melting point component melts the low melting point component while substantially maintaining the original fiber state, and is molded into a predetermined mold And a method for producing a plastic molded body characterized by cooling (claim 1 of Patent Document 1). As a specific method, a fiber product containing a high melting point component and a low melting point component is put into a screw type extruder, heated to a predetermined temperature in the extruder, and then extruded from the extruder to obtain a plastic molded plate. Method of obtaining (Example 1 of Patent Document 1), a method of obtaining a plastic molded plate by storing a fiber product containing a high melting point component and a low melting point component in a mold and then heating and pressing to a predetermined temperature (Example 5 of patent document 1) was proposed. By such a method, a plastic molded plate capable of nailing and screwing can be obtained, and it can be suitably used for various applications.
しかしながら、このようにして得られたプラスチック成型板を、パレットの材料として用いた場合、以下のような欠点が発生した。すなわち、パレットは、その上に物品を載置して、移動するために使用するものであるから、パレットの表面と物品とが擦れて、パレット表面に毛羽立ちが発生することがあった。つまり、特許文献１に記載されたプラスチック成型板は、高融点成分よりなる繊維が、当初の繊維状態を維持して、プラスチック成型板の母体（主として、低融点成分の溶融によって形成された母体）中に存在しているため、この繊維が毛羽となって表面に現出してくるのである。パレット表面が毛羽立つと、見掛けが悪くなるという不具合が生じる。 However, when the plastic molding plate thus obtained is used as a material for a pallet, the following drawbacks occur. That is, since the pallet is used for placing and moving an article on the pallet, the surface of the pallet and the article are rubbed, and fluffing may occur on the pallet surface. That is, in the plastic molded plate described in Patent Document 1, the fibers made of the high melting point component maintain the original fiber state, and the base of the plastic molded plate (mainly formed by melting the low melting point component). Because it exists inside, this fiber becomes fluff and appears on the surface. When the surface of the pallet is fuzzy, a problem that the appearance is deteriorated occurs.
そこで、本発明は、特許文献１記載のプラスチック成型体の製造方法に、特定の手段を付加することによって、プラスチック成型体表面の毛羽立ちを抑えようとするものである。すなわち、本発明は、特許文献１記載の発明を利用した改良発明に係るものである。 Therefore, the present invention intends to suppress fuzz on the surface of the plastic molded body by adding specific means to the method for producing a plastic molded body described in Patent Document 1. That is, the present invention relates to an improved invention utilizing the invention described in Patent Document 1.
本発明において採用した特定の手段は、特許文献１記載の製造方法において、成型時に、成型される繊維製品表面に、特定の融点を持つ不織布を積層し、さらに、この不織布表面に、凹凸模様を持つ耐熱体を当接するというものである。つまり、本発明は、高融点成分と低融点成分とを含む繊維製品を加熱して、該高融点成分は当初の繊維状態を実質的に維持させたまま、該低融点成分を溶融させ、所定の型に成型してプラスチック成型体を製造する方法において、前記繊維製品表面に、その融点が前記高融点成分の融点より低く、かつ、前記低融点成分の融点以上である繊維で構成された不織布を積層し、さらに、該不織布表面に、凹凸模様を持つ耐熱体を当接することによって、前記繊維製品中の低融点成分全部と該不織布中の繊維全部とを溶融させて、前記繊維製品と該不織布とを圧着一体化すると共に、表面に凹凸模様を賦型することを特徴とするパレット用プラスチック成型体の製造方法に関するものである。また、好ましい実施態様は、高融点成分と低融点成分とを含むシート状の繊維製品の、少なくとも片面に、その融点が前記高融点成分の融点より低く、かつ、前記低融点成分の融点以上である繊維で構成された不織布を積層し、さらに、該不織布表面に、凹凸模様を持つ耐熱体を当接した状態で、加熱板で該繊維製品及び該不織布を加熱及び加圧することによって、該繊維製品中の前記高融点成分は当初の繊維状態を実質的に維持させたまま、該繊維製品中の前記低融点成分全部と該不織布中の繊維全部とを溶融させて、該繊維製品と該不織布とを圧着一体化すると共に、少なくとも一表面に凹凸模様を賦型することを特徴とするパレット用プラスチック成型体の製造方法というものである。 The specific means employed in the present invention is the production method described in Patent Document 1, wherein a nonwoven fabric having a specific melting point is laminated on the surface of the fiber product to be molded at the time of molding, and further, a concavo-convex pattern is formed on the surface of the nonwoven fabric. The heat-resistant body is held in contact. That is, the present invention heats a fiber product containing a high melting point component and a low melting point component, melts the low melting point component while maintaining the original fiber state substantially, In the method for producing a plastic molded body by molding into a mold of the above, a nonwoven fabric composed of fibers on the surface of the fiber product, the melting point of which is lower than the melting point of the high melting point component and equal to or higher than the melting point of the low melting point component was laminated, further, the non-woven fabric surface, by contacting the refractory body having an uneven pattern, by melting and all fibers of the fibrous low melting point component entirely and the nonwoven fabric in the product, the textile and the The present invention relates to a method for producing a plastic molded article for a pallet, characterized in that a nonwoven fabric and a nonwoven fabric are bonded and integrated, and an uneven pattern is formed on the surface. In a preferred embodiment, the sheet-like fiber product containing the high melting point component and the low melting point component has a melting point lower than the melting point of the high melting point component and at least equal to the melting point of the low melting point component on at least one side. By laminating a non-woven fabric composed of a certain fiber, and further heating and pressing the fiber product and the non-woven fabric with a heating plate in a state in which a heat-resistant body having an uneven pattern is in contact with the non-woven fabric surface, the fiber The fiber product and the nonwoven fabric are melted by melting all the low melting point components in the fiber product and all the fibers in the nonwoven fabric while maintaining the initial fiber state of the high melting component in the product. And a concavo-convex pattern on at least one surface, and a method for producing a plastic molded body for pallets.
まず、本発明においては、高融点成分と低融点成分とを含む繊維製品を準備する。この繊維製品としては、繊維工場から発生する繊維製品の屑であるのが好ましい。たとえば、高融点成分と低融点成分とが複合されてなる複合繊維を用いて製造される不織布や編織物などの繊維製品の屑であるのが好ましい。複合繊維としては、高融点成分を芯成分とし、低融点成分を鞘成分とする芯鞘型複合繊維であってもよいし、断面半月状の高融点成分と断面半月状の低融点成分とが貼合されてなるサイドバイサイド型複合繊維であってもよい。さらに、高融点成分のみよりなる高融点繊維と、低融点成分のみよりなる低融点繊維とを併用して製造された不織布や編織物などの繊維製品の屑であるのが好ましい。また、繊維製品を粉砕したフレーク状片や粉状物も、本発明でいう繊維製品に含まれる。繊維製品を粉砕した場合、繊維製品を構成する繊維の長さは短くなるが、それでもなお、繊維形態をある程度維持しているため、本発明でいう繊維製品に含まれるのである。なお、繊維製品中には、高融点成分と低融点成分以外に、その他の任意の繊維、染顔料、バインダーなどが含まれていてもよい。 First, in the present invention, a fiber product including a high melting point component and a low melting point component is prepared. As this textile product, it is preferable that it is the waste of the textile product generated from a textile factory. For example, it is preferably scrap of fiber products such as nonwoven fabrics and knitted fabrics manufactured using composite fibers in which a high melting point component and a low melting point component are combined. The composite fiber may be a core-sheath type composite fiber having a high melting point component as a core component and a low melting point component as a sheath component, and a high melting point component having a semicircular cross section and a low melting point component having a semicircular cross section. It may be a side-by-side type composite fiber that is bonded. Furthermore, it is preferable that it is the waste of fiber products, such as a nonwoven fabric and a knitted fabric, which are produced by using a high melting point fiber consisting only of a high melting point component and a low melting point fiber consisting only of a low melting point component. In addition, flakes and powders obtained by pulverizing fiber products are also included in the fiber products referred to in the present invention. When the fiber product is pulverized, the length of the fiber constituting the fiber product is shortened. However, since the fiber form is still maintained to some extent, it is included in the fiber product referred to in the present invention. In addition to the high melting point component and the low melting point component, other arbitrary fibers, dyes and pigments, binders, and the like may be included in the fiber product.
繊維製品中における高融点成分と低融点成分の重量比は、高融点成分：低融点成分＝３〜７：７〜３であるのが好ましい。したがって、複合繊維のみよりなる繊維製品の場合、高融点成分と低融点成分との複合比が、高融点成分：低融点成分＝３〜７：７〜３であるのが好ましい。また、高融点成分のみよりなる高融点繊維と、低融点成分のみよりなる低融点繊維とからなる繊維製品の場合、高融点繊維：低融点繊維＝３〜７：７〜３であるのが好ましい。低融点成分の量がこの範囲より少ないと、溶融した低融点成分がプラスチック成型体の母体となりにくい傾向が生じる。なお、低融点成分の量が少ない場合には、繊維製品と共に、低融点成分と同程度の融点を持つ樹脂ペレットを用いれば、この問題は解消される。また、低融点成分の量がこの範囲より多いと、相対的に繊維形態を維持する高融点成分の量が少なくなって、耐衝撃性や曲げ強度などが徐々に低下したり、釘打ちやネジ打ちによる割れが徐々に発生する傾向が生じる。 The weight ratio of the high melting point component and the low melting point component in the fiber product is preferably high melting point component: low melting point component = 3-7: 7-3. Therefore, in the case of a fiber product composed only of composite fibers, the composite ratio of the high melting point component and the low melting point component is preferably high melting point component: low melting point component = 3-7: 7-3. Further, in the case of a fiber product composed of a high melting point fiber composed only of a high melting point component and a low melting point fiber composed only of a low melting point component, it is preferable that high melting point fiber: low melting point fiber = 3-7: 7-3. . When the amount of the low melting point component is less than this range, the molten low melting point component tends to be difficult to be a base material of a plastic molded body. When the amount of the low melting point component is small, this problem can be solved by using a resin pellet having a melting point similar to that of the low melting point component together with the fiber product. In addition, if the amount of the low melting point component is larger than this range, the amount of the high melting point component that relatively maintains the fiber form decreases, and the impact resistance, bending strength, etc. gradually decrease, nailing or screwing. There is a tendency for cracks to occur gradually.
高融点成分と低融点成分の融点差は、５０℃以上であるのが好ましい。融点差が５０℃未満であると、低融点成分を溶融させた際、高融点成分も軟化する恐れがあり、当初の繊維形態を維持しにくくなる傾向が生じる。高融点成分と低融点成分の組み合わせの具体例としては、ポリエチレンテレフタレート／ポリプロピレン、ポリエチレンテレフタレート／ポリエチレン、ポリエチレンテレフタレート／低融点ポリエステル共重合体、ポリエチレンテレフタレート／ポリアミド、ポリプロピレン／ポリエチレンなどを例示することができる。 The difference in melting point between the high melting point component and the low melting point component is preferably 50 ° C. or more. When the melting point difference is less than 50 ° C., when the low melting point component is melted, the high melting point component may also be softened, which tends to make it difficult to maintain the original fiber form. Specific examples of the combination of the high melting point component and the low melting point component include polyethylene terephthalate / polypropylene, polyethylene terephthalate / polyethylene, polyethylene terephthalate / low melting point polyester copolymer, polyethylene terephthalate / polyamide, polypropylene / polyethylene, and the like. .
準備した繊維製品は、加熱される。加熱条件は、高融点成分は当初の繊維状態を実質的に維持させたまま、低融点成分を溶融させうるような条件である。たとえば、低融点成分の融点が１２０℃で、高融点成分の融点が２５０℃である場合、加熱温度は１２０℃以上で２５０℃未満であればよく、特に、１７０〜２００℃程度というように、両者の中間程度の温度が最もよい。加熱の具体的態様としては、シート状の繊維製品を厚み方向に圧縮しながら加熱する態様や、押出機に繊維製品を投入し、押出機中で加熱する態様、金型に繊維製品を収納し、金型内で加熱する態様などが挙げられる。また、繊維製品を加熱する際、繊維製品のみではなく、低融点成分と同程度の融点を持つ樹脂ペレットを混在させてもよい。低融点成分のみでプラスチック成型体の母体を形成させるよりも、樹脂ペレットを併用した方が、母体を形成しやすいからである。なお、樹脂ペレットの素材としては、ポリエチレン、ポリプロピレン、低融点ポリエステル共重合体、ポリアミドなどを用いることができる。 The prepared textile product is heated. The heating conditions are such that the high melting point component can melt the low melting point component while substantially maintaining the original fiber state. For example, when the melting point of the low melting point component is 120 ° C. and the melting point of the high melting point component is 250 ° C., the heating temperature may be 120 ° C. or more and less than 250 ° C., particularly about 170 to 200 ° C. An intermediate temperature between the two is the best. As specific modes of heating, a mode in which a sheet-like fiber product is heated while being compressed in the thickness direction, a mode in which the fiber product is introduced into the extruder and heated in the extruder, and the fiber product is stored in a mold. And an embodiment in which heating is performed in a mold. Moreover, when heating a fiber product, you may mix not only a fiber product but the resin pellet which has melting | fusing point comparable as a low melting component. This is because it is easier to form the matrix when the resin pellets are used together than to form the matrix of the plastic molded body only with the low melting point component. In addition, as a raw material of the resin pellet, polyethylene, polypropylene, a low-melting point polyester copolymer, polyamide, or the like can be used.
繊維製品の加熱前又は加熱中又は加熱直後に、繊維製品の表面に、別途準備した不織布が積層される。この不織布は、特定の融点を持つ繊維で構成されているものである。すなわち、その融点が、繊維製品中の高融点成分の融点より低く、かつ、繊維製品中の低融点成分の融点以上である繊維で構成されている。例えば、高融点成分の融点が２５０℃で低融点成分の融点が１２０℃の場合、不織布を構成する繊維の融点は、１２０℃以上で２５０℃未満ということになる。この不織布は、繊維製品の表面に圧着一体化され、最終的にプラスチック成型体の少なくとも一表面を被覆して、プラスチック成型体の母体中に存在する高融点成分の毛羽立ちを抑えるものである。したがって、不織布を構成する繊維の融点が、高融点成分の融点よりも高いと、不織布中の繊維が溶融せず、この繊維による毛羽が発生するため、好ましくない。また、低融点成分の融点よりも低いと、溶融して内部へ浸透してしまい、表面を十分に被覆しにくくなり、高融点成分による毛羽立ちを抑えにくくなるので、好ましくない。 A separately prepared non-woven fabric is laminated on the surface of the fiber product before, during or immediately after heating the fiber product. This nonwoven fabric is composed of fibers having a specific melting point. That is, it is composed of fibers whose melting point is lower than the melting point of the high melting point component in the fiber product and equal to or higher than the melting point of the low melting point component in the fiber product. For example, when the melting point of the high melting point component is 250 ° C. and the melting point of the low melting point component is 120 ° C., the melting point of the fibers constituting the nonwoven fabric is 120 ° C. or more and less than 250 ° C. This nonwoven fabric is pressed and integrated with the surface of the fiber product, and finally covers at least one surface of the plastic molded body to suppress fuzz of high melting point components present in the matrix of the plastic molded body. Therefore, if the melting point of the fibers constituting the nonwoven fabric is higher than the melting point of the high melting point component, the fibers in the nonwoven fabric are not melted and fluff due to the fibers is generated, which is not preferable. On the other hand, if it is lower than the melting point of the low melting point component, it melts and penetrates into the inside, and it becomes difficult to sufficiently cover the surface, and it is difficult to suppress fuzz due to the high melting point component, which is not preferable.
また、不織布表面には、凹凸模様を持つ耐熱体が当接される。一般に、この当接は加圧下において行われる。この耐熱体は、繊維製品中の低融点成分及び不織布中の繊維が溶融しているときに当接されるため、得られるプラスチック成型体表面には、耐熱体に設けられた凹凸模様に対応した、凹凸模様が賦型されることになる。凹凸模様を持つ耐熱体としては、表面が凹凸となっているもので、低融点成分や不織布中の繊維が溶融しているときに、軟化したり溶融したりしないものであれば、どのようなものでも用いられる。具体的には、製編織された金網を用いるのが好ましい。このような金網は、線条が重なり合う部分（織物のときは線条の交叉部であり、編物のときは線条がループを形成する部分）が凸となっており、その他の部分が凹となって、表面は凹凸模様となっている。凹凸の数は任意であって良く、例えば４〜３６個／ｃｍ2程度で良い。凹凸の数が４個／ｃｍ2未満であると、平坦な部分が多く残る傾向となり、プラスチック成型体表面が滑りやすくなる。また、３６個／ｃｍ2以上の場合も、凹凸が緻密になりすぎて、プラスチック成型体表面が滑りやすくなる。なお、耐熱体として金網を用いた場合、５〜１４メッシュ程度のものが、４〜３６個／ｃｍ2程度の凹凸を持っており、好ましく、特に５〜１０メッシュ程度のものが最も好ましい。 Moreover, the heat-resistant body with an uneven | corrugated pattern is contact | abutted on the nonwoven fabric surface. In general, this contact is performed under pressure. Since this heat-resistant body is brought into contact when the low-melting-point component in the fiber product and the fiber in the nonwoven fabric are melted, the surface of the obtained plastic molding corresponds to the uneven pattern provided on the heat-resistant body. As a result, a concavo-convex pattern is formed. As a heat-resistant body having a concavo-convex pattern, any surface can be used as long as the surface has irregularities and does not soften or melt when the low melting point component or the fiber in the nonwoven fabric is melted. It is also used for things. Specifically, it is preferable to use a woven or knitted wire mesh. In such a wire netting, the portion where the filaments overlap (the intersection of the filaments in the case of woven fabric, the portion where the filaments form a loop in the case of knitted fabric) is convex, and the other part is concave. The surface is uneven. The number of irregularities may be arbitrary, for example, about 4 to 36 / cm 2 . When the number of irregularities is less than 4 pieces / cm 2 , many flat portions tend to remain, and the surface of the plastic molded body becomes slippery. Also, in the case of 36 / cm 2 or more, the unevenness becomes too dense, and the surface of the plastic molded body becomes slippery. In addition, when a wire net is used as the heat-resistant body, those having a mesh size of about 5 to 14 mesh have irregularities of about 4 to 36 / cm 2 , preferably about 5 to 10 mesh.
シート状の繊維製品を、厚み方向に圧縮しながら加熱する具体的態様を説明すれば、以下のとおりである。まず、シート状の繊維製品を準備して、その少なくとも片面に、前記した不織布を積層する。もちろん、繊維製品の両面に不織布を積層してもよい。そして、不織布表面に、金網等の凹凸模様を持つ耐熱体を置く。この状態で、加熱板を用いて、繊維製品及び不織布を厚み方向に圧縮しながら、加熱及び加圧する。加熱板としては、従来公知のものが用いられ、繊維製品及び不織布の片側又は両側に用いて、これらを厚み方向に圧縮するようにして用いられる。そうすると、繊維製品中の高融点成分は当初の繊維状態を実質的に維持したまま、繊維製品中の低融点成分と不織布中の繊維とが溶融し、繊維製品と不織布とを圧着一体化すると共に、少なくとも一表面に、耐熱体の当接による凹凸模様がプラスチック成型体の表面に賦型される。 A specific embodiment in which the sheet-like fiber product is heated while being compressed in the thickness direction is as follows. First, a sheet-like fiber product is prepared, and the above-described nonwoven fabric is laminated on at least one surface thereof. Of course, you may laminate a nonwoven fabric on both surfaces of a textile product. And the heat-resistant body which has uneven | corrugated patterns, such as a wire net, is put on the nonwoven fabric surface. In this state, using a heating plate, the fiber product and the nonwoven fabric are heated and pressurized while being compressed in the thickness direction. A conventionally well-known thing is used as a heating plate, It is used so that these may be used for the one side or both sides of a textiles and a nonwoven fabric, and these may be compressed in the thickness direction. Then, while the high melting point component in the fiber product substantially maintains the original fiber state, the low melting point component in the fiber product and the fiber in the non-woven fabric are melted, and the fiber product and the non-woven fabric are combined by pressure bonding. The concave / convex pattern due to the contact of the heat-resistant body is formed on the surface of the plastic molded body on at least one surface.
また、押出機に繊維製品を投入し、押出機中で加熱する場合、押出機で押し出された直後の繊維製品成型体の表面に不織布を積層する。そして、不織布表面に凹凸模様を持つ耐熱体を置き、直ちに、耐熱体によって繊維製品成型体及び不織布を加圧することによって、耐熱体を不織布表面に当接させる。そうすると、押出機から押し出された直後の繊維製品成型体は高温状態であるので、この熱によって不織布を構成する繊維も溶融し、繊維製品成型体と不織布とが圧着一体化されると共に、耐熱体の当接による凹凸模様がプラスチック成型体の表面に賦型されるのである。 In addition, when a fiber product is put into an extruder and heated in the extruder, a nonwoven fabric is laminated on the surface of the fiber product molded body immediately after being extruded by the extruder. Then, a heat-resistant body having a concavo-convex pattern is placed on the surface of the nonwoven fabric, and the heat-resistant body is immediately brought into contact with the surface of the nonwoven fabric by pressurizing the fiber product molded body and the nonwoven fabric with the heat-resistant body. Then, since the fiber product molded body immediately after being extruded from the extruder is in a high temperature state, the fibers constituting the nonwoven fabric are also melted by this heat, and the fiber product molded body and the nonwoven fabric are pressure-integrated and heat resistant. The uneven pattern due to the contact is formed on the surface of the plastic molding.
また、金型を用いて加熱する場合は、以下のようになる。まず、金型内に、繊維製品を収納した後、繊維製品表面に前記した不織布を積層する。そして、不織布表面に、金網等の凹凸模様を持つ耐熱体を置く。繊維製品及び不織布を加熱しながら、耐熱体によって繊維製品及び不織布を加圧して、耐熱体を不織布表面に当接させる。そうすると、繊維製品中の低融点成分と不織布中の繊維とが溶融して、繊維製品と不織布とが圧着一体化されると共に、耐熱体の当接による凹凸模様がプラスチック成型体の表面に賦型される。 Moreover, when heating using a metal mold | die, it is as follows. First, after storing a fiber product in a metal mold | die, the above-mentioned nonwoven fabric is laminated | stacked on the fiber product surface. And the heat-resistant body which has uneven | corrugated patterns, such as a wire net, is put on the nonwoven fabric surface. While heating the fiber product and the non-woven fabric, the fiber product and the non-woven fabric are pressurized with the heat-resistant body to bring the heat-resistant body into contact with the surface of the non-woven fabric. As a result, the low melting point component in the fiber product and the fiber in the nonwoven fabric are melted, and the fiber product and the nonwoven fabric are pressed and integrated, and an uneven pattern due to the contact of the heat-resistant body is formed on the surface of the plastic molded body. Is done.
以上のような方法によって、繊維製品及び繊維製品表面に積層された不織布とが圧着一体化して、所定の型に成型される。一般的には板状の型に成型され、成型体の表面には凹凸模様が賦型された状態となっている。 By the method as described above, the fiber product and the nonwoven fabric laminated on the surface of the fiber product are pressure-integrated and molded into a predetermined mold. Generally, it is molded into a plate-shaped mold, and the surface of the molded body is in a state in which an uneven pattern is formed.
所定の型に成型した後、成型体を冷却する。冷却は、冷却板を用いたり、あるいは水などを用いて積極的に冷却してもよいし、大気中に放置しておいて自然に冷却してもよい。一般的には、放置しておくと成型体の形状が変化する恐れがあるので、積極的に冷却する方が好ましく、中でも、２枚の１５〜３０℃の冷却板に挟み込んで、１０〜４０分間成型体の形状を固定した状態を保持しながら、積極的に冷却することが好ましい。このようにして得られたプラスチック成型体は、主として低融点成分で形成された母体中に、比較的均一に高融点成分が存在し、しかも高融点成分は当初の繊維形態を維持している。したがって、全体として均一な耐衝撃性及び曲げ強度を持ち、かつ、釘打ちやネジ打ちの可能なものである。 After molding into a predetermined mold, the molded body is cooled. For cooling, a cooling plate may be used or water may be positively cooled, or it may be left naturally in the atmosphere to cool naturally. Generally, since there is a possibility that the shape of the molded body may change if it is left as it is, it is preferable to cool it actively. Among them, it is sandwiched between two cooling plates at 15 to 30 ° C. It is preferable to actively cool while maintaining the state where the shape of the molded body is fixed for a minute. In the plastic molded body thus obtained, the high melting point component is present relatively uniformly in the matrix formed mainly of the low melting point component, and the high melting point component maintains the original fiber form. Therefore, it has uniform impact resistance and bending strength as a whole, and can be nailed and screwed.
以上説明したように、本発明に係る方法で得られたパレット用プラスチック成型体は、主として、高融点成分と低融点成分とを含む繊維製品を原料として用いるものである。そして、低融点成分を溶融させ、高融点成分は当初の繊維形態を維持させたままで、パレット用プラスチック成型体とするものである。繊維製品中には、一定の割合で均一に高融点成分と低融点成分が存在しているので、上記した方法で、全体として均一なプラスチック成型体が得られるのである。したがって、曲げ強度などの物性が均一で、しかも、どの箇所でも釘打ちやネジ打ちが可能なプラスチック成型体が得られるという効果を奏する。 As described above, the plastic molded article for pallets obtained by the method according to the present invention is mainly used as a raw material for a fiber product containing a high melting point component and a low melting point component. Then, the low melting point component is melted, and the high melting point component is made into a plastic molded body for pallets while maintaining the original fiber form. Since the high melting point component and the low melting point component are present uniformly in a certain ratio in the fiber product, a uniform plastic molded body as a whole can be obtained by the method described above. Therefore, it is possible to obtain a plastic molded body having uniform physical properties such as bending strength and capable of nailing and screwing at any location.
また、本発明に係る方法で得られたパレット用プラスチック成型体は、その表面が特定の層（特定の不織布中の繊維全部が溶融して形成された層）で被覆されていると共に、その表面が凹凸模様となっており表面の接触面積が少なくなるので、層下の母体中に存在し当初の繊維形態を維持している高融点成分が、成型体表面に毛羽立ってくるのを防止しうる。さらに、このパレット用プラスチック成型体表面は、凹凸模様の賦型によって、でこぼこ状態となっている。したがって、表面に毛羽が発生しないことと、でこぼこ状態とによって、この成型体を用いて得られたパレットは、使用を続けても外観が悪くなりにくく、しかも物品を載置した場合、この物品が滑りにくく、落下の危険を防止しうるという効果を奏する。また、パレット同士を積み重ねて搬送する場合も、パレット同士が滑りにくく、搬送及び移動しやすいという効果を奏する。 Moreover, the plastic molded body for pallets obtained by the method according to the present invention has its surface coated with a specific layer (a layer formed by melting all the fibers in a specific nonwoven fabric) and its surface. Can be prevented from fluffing on the surface of the molded body due to the uneven pattern and the contact area of the surface is reduced, so that the high melting point component that exists in the matrix under the layer and maintains the original fiber form can be prevented. . Furthermore, the surface of the plastic molded body for pallets is in a bumpy state due to the formation of the uneven pattern. Therefore, the appearance of the pallet obtained using this molded body due to the fact that no fluff is generated on the surface and the bumpy state is unlikely to deteriorate even if the pallet is continuously used. It is hard to slip and has the effect of preventing the danger of falling. In addition, even when the pallets are stacked and transported, the pallets are less likely to slip and can be easily transported and moved.
以下、実施例に基づいて本発明を説明するが、本発明は実施例に限定されるものではない。本発明は、特許文献１記載の発明の利用発明に関し、特定の手段を付加することによって、プラスチック成型体表面を滑りにくくしたものとして、解釈されるべきである。 EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. The present invention relates to a use invention of the invention described in Patent Document 1, and should be construed as making the surface of the plastic molded body difficult to slip by adding specific means.
実施例１
スパンボンド不織布「エルベス」（ユニチカ株式会社製）を製造する際に発生する耳屑を準備した。「エルベス」は、芯成分が融点２５６℃のポリエチレンテレフタレートで、鞘成分が融点１３５℃のポリエチレンで構成された芯鞘型複合長繊維よりなるスパンボンド不織布である。また、この複合繊維の芯成分：鞘成分＝５０：５０（重量比）であり、複合繊維の繊度は３．３ｄｔｅｘである。したがって、耳屑も、同一の組成よりなるものである。
Example 1
Ear dust generated when producing a spunbond nonwoven fabric “Elves” (manufactured by Unitika Ltd.) was prepared. “Elves” is a spunbonded non-woven fabric made of core-sheath type composite long fibers whose core component is polyethylene terephthalate having a melting point of 256 ° C. and whose sheath component is polyethylene having a melting point of 135 ° C. Moreover, the core component: sheath component of this composite fiber is 50:50 (weight ratio), and the fineness of the composite fiber is 3.3 dtex. Therefore, the ear dust also has the same composition.
この耳屑をカセ機で巻き取り、１箇所を切断して、幅５００ｍｍ、長さ２５００ｍｍ、質量２５ｋｇの積層シートを準備した。一方、融点１９０℃のポリプロピレン繊維で構成されたスパンボンド不織布であって、幅５００ｍｍ、長さ２５００ｍｍ、質量０．２５ｋｇのものを準備した。積層シートの上面にスパンボンド不織布を積層し、更にスパンボンド不織布上にステンレス製平織金網（８メッシュ）を乗せて、二枚の加熱板でこれらを挟み込み（いわゆるホットプレス方式）、温度１９０℃、圧力２．４５ＭＰａの条件にて成型した。次いで、２枚の冷却板に挟み込み（いわゆるコールドプレス方式）、温度２５℃、圧力２．４５ＭＰａの条件で冷却して、プラスチック成型体を得た。得られたプラスチック成型板（Ａ）は、幅５００ｍｍ、長さ２５００ｍｍ、厚さ２５ｍｍであり、スパンボンド不織布を積層した面において、金網の凹凸模様が賦型されており、その凸部の数は１６個／ｃｍ2であった。 This ear dust was wound up with a caulking machine and cut at one place to prepare a laminated sheet having a width of 500 mm, a length of 2500 mm, and a mass of 25 kg. On the other hand, a spunbonded nonwoven fabric composed of polypropylene fibers having a melting point of 190 ° C. and having a width of 500 mm, a length of 2500 mm, and a mass of 0.25 kg was prepared. A spunbonded nonwoven fabric is laminated on the top surface of the laminated sheet, and a stainless steel plain woven wire mesh (8 mesh) is further placed on the spunbonded nonwoven fabric, and these are sandwiched between two heating plates (so-called hot press method), at a temperature of 190 ° C., Molding was performed under conditions of a pressure of 2.45 MPa. Subsequently, it was sandwiched between two cooling plates (so-called cold press method) and cooled under the conditions of a temperature of 25 ° C. and a pressure of 2.45 MPa to obtain a plastic molded body. The obtained plastic molded plate (A) has a width of 500 mm, a length of 2500 mm, and a thickness of 25 mm. On the surface on which the spunbond nonwoven fabric is laminated, a metal mesh uneven pattern is formed, and the number of the convex portions is It was 16 pieces / cm 2 .
また、積層シートの厚さ（質量）を変える他は、同様の方法で、プラスチック成型板（Ｂ）を得た。このプラスチック成型板（Ｂ）は、幅５００ｍｍ、長さ２５００ｍｍ、厚さ２０ｍｍであった。 Moreover, the plastic molding board (B) was obtained with the same method except changing the thickness (mass) of a lamination sheet. The plastic molded plate (B) had a width of 500 mm, a length of 2500 mm, and a thickness of 20 mm.
さらに、積層シートの厚さ（質量）を変える他は、同様の方法で、プラスチック成型板（Ｃ）を得た。このプラスチック成型板（Ｃ）は、幅５００ｍｍ、長さ２５００ｍｍ、厚さ３０ｍｍであった。 Further, a plastic molded plate (C) was obtained in the same manner except that the thickness (mass) of the laminated sheet was changed. This plastic molded plate (C) had a width of 500 mm, a length of 2500 mm, and a thickness of 30 mm.
プラスチック成型板（Ａ）及び（Ｂ）を、幅１２０ｍｍ、長さ１１００ｍｍに切断し、プラスチック成型板（Ｃ）を、幅９５ｍｍ、長さ１１００ｍｍに切断した。プラスチック成型板（Ｃ）を、パレットの脚部用部材とし、等間隔に３枚置いた。この際、プラスチック成型板（Ｃ）は、その幅９５ｍｍが厚さ方向となるようにした。そして、この上にプラスチック成型板（Ａ）６枚を、成型板（Ｃ）に対し直角に等間隔に並べ、この際、プラスチック成型板（Ａ）の凹凸模様面を外側（成型板（Ａ）と（Ｃ）とが当接していない側）となるようにした。その後、成型板（Ａ）と成型板（Ｃ）とが当接している箇所全てに、スクリューネジを打って固定した。これを裏返し、プラスチック成型板（Ｂ）３枚を、成型板（Ｃ）に対し直角に等間隔に並べ、この際、プラスチック成型板（Ｂ）の凹凸模様面を外側（成型板（Ｂ）と（Ｃ）とが当接していない側）となるようにした。そして、成型板（Ｂ）と成型板（Ｃ）とが当接している箇所全てに、スクリューネジを打って固定した。以上のようにして、幅１１００ｍｍ、長さ１１００ｍｍ、厚さ１４０ｍｍの大きさのパレットを得た。 The plastic molded plates (A) and (B) were cut into a width of 120 mm and a length of 1100 mm, and the plastic molded plate (C) was cut into a width of 95 mm and a length of 1100 mm. Three plastic molded plates (C) were used as pallet leg members, and three pieces were placed at equal intervals. At this time, the plastic molded plate (C) had a width of 95 mm in the thickness direction. On this, six plastic molded plates (A) are arranged at equal intervals at right angles to the molded plate (C). At this time, the uneven pattern surface of the plastic molded plate (A) is placed outside (molded plate (A)). And (C) are on the side where they are not in contact with each other. Then, it screwed and fixed to all the locations where the molding board (A) and the molding board (C) are contacting. Turn this over and place 3 plastic molded plates (B) at right angles to the molded plate (C) at the same interval. At this time, the uneven surface of the plastic molded plate (B) is placed outside (molded plate (B)). (C) and the side not in contact). And it fixed with the screw screw to all the locations where the molding board (B) and the molding board (C) are in contact. As described above, a pallet having a width of 1100 mm, a length of 1100 mm, and a thickness of 140 mm was obtained.
実施例２
ステンレス製平織金網（８メッシュ）に代えて、ステンレス製平織金網（５メッシュ）を用いる他は、実施例１と同一の方法でパレットを得た。
Example 2
A pallet was obtained in the same manner as in Example 1, except that a stainless steel plain woven wire mesh (5 mesh) was used instead of the stainless steel plain woven wire mesh (8 mesh).
実施例３
ステンレス製平織金網（８メッシュ）に代えて、ステンレス製平織金網（１０メッシュ）を用いる他は、実施例１と同一の方法でパレットを得た。
Example 3
A pallet was obtained in the same manner as in Example 1 except that a stainless steel plain woven wire mesh (10 mesh) was used instead of the stainless steel plain woven wire mesh (8 mesh).
実施例４
ステンレス製平織金網（８メッシュ）に代えて、ステンレス製平織金網（１４メッシュ）を用いる他は、実施例１と同一の方法でパレットを得た。
Example 4
A pallet was obtained in the same manner as in Example 1 except that a stainless steel plain woven wire mesh (14 mesh) was used instead of the stainless steel plain woven wire mesh (8 mesh).
比較例１
ステンレス製平織金網（８メッシュ）を使用しない他は、実施例１と同一の方法でパレットを得た。この場合、各プラスチック成型板（Ａ）、（Ｂ）及び（Ｃ）は、いずれも凹凸模様が付されていないものであった。
Comparative Example 1
A pallet was obtained in the same manner as in Example 1 except that stainless steel plain woven wire mesh (8 mesh) was not used. In this case, each of the plastic molded plates (A), (B) and (C) was not provided with an uneven pattern.
実施例１〜４及び比較例１で得られた各パレットを、成型板（Ａ）が上で成型板（Ｃ）を下にして、５枚重ね、長さ方向に対して１５度傾斜させ、最上部のパレットの滑りを確認した。この結果、実施例１〜３で得られた各パレットは、いずれも滑りが殆ど無かった。実施例４で得られたパレットは、振動を与えると滑り出すものであった。一方、比較例１で得られたパレットは、振動を与えなくても滑り出すものであった。 Each pallet obtained in Examples 1 to 4 and Comparative Example 1 is stacked with 5 molding plates (A) on top and the molding plate (C) on the bottom, and is inclined 15 degrees with respect to the length direction. Sliding of the top pallet was confirmed. As a result, each pallet obtained in Examples 1 to 3 had almost no slip. The pallet obtained in Example 4 started to slide when subjected to vibration. On the other hand, the pallet obtained in Comparative Example 1 started to slide without being vibrated.
また、各パレットの凹凸模様面（比較例１で得られたパレットは凹凸模様面が無いので、平坦面）を擦ったところ、実施例１〜４で得られたパレットの場合は、毛羽立ちが少なかったのに対して、比較例１で得られたパレットは毛羽立ちが激しかった。 Moreover, when the concavo-convex pattern surface of each pallet (the pallet obtained in Comparative Example 1 does not have the concavo-convex pattern surface) is rubbed, in the case of the pallets obtained in Examples 1 to 4, there is little fuzz. In contrast, the pallet obtained in Comparative Example 1 was intensely fuzzy.
Claims (5)
前記繊維製品表面に、その融点が前記高融点成分の融点より低く、かつ、前記低融点成分の融点以上である繊維で構成された不織布を積層し、さらに、該不織布表面に、凹凸模様を持つ耐熱体を当接した状態で、前記繊維製品中の低融点成分全部と該不織布中の繊維全部とを溶融させて、前記繊維製品と該不織布とを圧着一体化すると共に、表面に凹凸模様を賦型することを特徴とするパレット用プラスチック成型体の製造方法。 The fiber product containing the high melting point component and the low melting point component is heated, and the high melting point component is melted and molded into a predetermined mold while substantially maintaining the original fiber state. In a method for producing a plastic molded body,
A nonwoven fabric composed of fibers having a melting point lower than the melting point of the high melting point component and higher than the melting point of the low melting point component is laminated on the surface of the fiber product, and further, the nonwoven fabric surface has an uneven pattern. In a state where the heat-resistant body is in contact, all the low-melting-point components in the fiber product and all the fibers in the nonwoven fabric are melted, and the fiber product and the nonwoven fabric are pressure-bonded and integrated, and an uneven pattern is formed on the surface. A method for producing a plastic molded article for pallets, characterized by molding.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5988959A (en) * | 1982-09-30 | 1984-05-23 | チコピ− | Nonwoven fabric, method and apparatus for producing same |
| JPH01162879A (en) * | 1987-12-18 | 1989-06-27 | Kanai Hiroyuki | Core cloth for clothing |
| JPH11320579A (en) * | 1998-05-12 | 1999-11-24 | Aicello Chemical Co Ltd | Method for molding recycled composite material |
| JP2002173862A (en) * | 2000-12-08 | 2002-06-21 | Chisso Corp | Composite nonwoven fabric and textile product using the same |
| JP2003313765A (en) * | 2002-04-25 | 2003-11-06 | Unitika Ltd | Method for producing formed plastic article |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5988959A (en) * | 1982-09-30 | 1984-05-23 | チコピ− | Nonwoven fabric, method and apparatus for producing same |
| JPH01162879A (en) * | 1987-12-18 | 1989-06-27 | Kanai Hiroyuki | Core cloth for clothing |
| JPH11320579A (en) * | 1998-05-12 | 1999-11-24 | Aicello Chemical Co Ltd | Method for molding recycled composite material |
| JP2002173862A (en) * | 2000-12-08 | 2002-06-21 | Chisso Corp | Composite nonwoven fabric and textile product using the same |
| JP2003313765A (en) * | 2002-04-25 | 2003-11-06 | Unitika Ltd | Method for producing formed plastic article |
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