200806833 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種椅具用彈性紗，係其芯層與表層係 同材質之TPEE彈性材料共擠壓成型，且芯層之熔點較表 層之熔點高。 【先前技術】 彈性紗之前案，如美國專利前案第5, 677, 057號與第 5, 858, 528號，係使用不同材質與不同熔點之塑膠材料芯 層與表層去共擠壓成型（coextrusion)。共擠壓成型 (coextrusion)之目的，可使芯層與表層在熔融狀態結合 為一體。 但因芯層與表層係不同材質製成，拉伸時，兩者因彈性 係數不同產生的形變也不同，剛開始，芯層與表層間會產 生極微小之剝離現象，用久之後，極快速的老化。 當前述彈性紗用於椅具之布面時，初期雖可在使用者 離開椅具時快速回復’用—段時間後會因使用者體重長期 施加，令芯層與表層快速產生剝離之間題，終於快速老 化，而失去彈性。 【發明内容】 本發明係提供一種椅具用彈性紗，藉其芯層與表層係 同材質之彈性材料共擠壓成型，且芯層之熔點較表層之溶 200806833 - 點高，而可解決芯層與表層不同材質用久會剝離之問題。 本發明為椅具用彈性紗，係由芯層與表層共擠壓成型 而構成，其中芯層與表層係同材質之彈性材料，該彈性材 料係 TPEE(Thermalplastic Ester Elastomer)，且芯層之 熔點較表層之熔點高，其中芯層與表層之彈性材料係 TPEE ’而芯層與表層之比例為9 : 1或8 : 2或7 : 3。 本發明亦可包括一種椅具用彈性網，其係以上述之椅 ®具用彈性紗製成者。 藉之，本發明具有下列之優點/增進功效： 1·壽命較長，芯層與表層不會剝離。 2·當使用者離開椅具後，彈性布會很快恢復原形。 ^ 【實施方法】 首先，如第一圖所示，’本發明第一實例係適用於椅具 • 之彈性紗（1)，係由芯層（11)與表層（12)共擠壓成型而構 成，其中芯層（11)與表層（12)係同材質之彈性材料[如聚 醋系熱塑性弹性體TPEE(Thermalplastic Ester Elastomer)]，且芯層（11)之熔點較表層（12)之熔點高， 其中芯層（11)與表層（12)之比例為9 : 1或8 : 2或7 : 3 等均可實施。 藉之，如第二圖所示，在熱熔接時，表層（12)因熔 點較低而熔融並結合，芯層（11)則不受影響，並因芯層（U) 200806833 與表層（12)係同材質共擠壓成型，熔點高之芯層（11)硬度 較高，受同樣力量時，變形量較小，表層（12)則因熔點較 低，硬度較低而較軟，受同樣力量時，變形量較大。表層 (12)較軟較易變形，而芯層（11)較硬且較易回復原狀。依 此，當多股彈性紗（1)絞合成彈性線時，彈性線可適當加 熱使各彈性紗（1)熔融結合，亦可當彈性線編成彈性布後 再適當加熱。 如第三圖所示，本發明第二實例之彈性紗（1A)，係由 芯層（11A)與表層（12A)共擠壓成型而構成，其中芯層（ηa) 與表層（12A)係如第四圓所示，仍同材質之彈性材料[如聚 酯系熱塑性彈性體TPEECThermalplastic Ester200806833 IX. Description of the Invention: [Technical Field] The present invention relates to an elastic yarn for a chair, which is formed by co-extrusion of a core layer and a surface layer of a TPEE elastic material of the same material, and the melting point of the core layer is higher than that of the surface layer. High melting point. [Prior Art] Prior to the elastic yarn, such as U.S. Patent Nos. 5,677,057 and 5,858,528, the core layer and the surface layer of the plastic material of different materials and different melting points are co-extruded ( Coextrusion). The purpose of coextrusion is to integrate the core layer and the surface layer in a molten state. However, due to the different materials of the core layer and the surface layer, the deformation caused by the different elastic coefficients is different when stretching. At the beginning, the core layer and the surface layer will have a very small peeling phenomenon. After a long time, it is extremely fast. Aging. When the elastic yarn is used for the cloth surface of the chair, the initial time can be quickly restored when the user leaves the chair. After a period of time, the user's body weight is applied for a long time, and the core layer and the surface layer are quickly peeled off. , finally aging quickly, and losing flexibility. SUMMARY OF THE INVENTION The present invention provides an elastic yarn for a chair, which is co-extruded by an elastic material of the same material and a surface layer, and the melting point of the core layer is higher than the surface layer of 200806833 - point, and the core can be solved. Different materials of the layer and the surface layer will be peeled off for a long time. The invention relates to an elastic yarn for a chair, which is formed by co-extruding a core layer and a surface layer, wherein the core layer and the surface layer are elastic materials of the same material, the elastic material is TPEE (Thermalplastic Ester Elastomer), and the melting point of the core layer The melting point of the surface layer is higher, wherein the elastic material of the core layer and the surface layer is TPEE ' and the ratio of the core layer to the surface layer is 9:1 or 8:2 or 7:3. The present invention may also include an elastic net for a chair, which is made of the above-mentioned chair® with elastic yarn. By the way, the present invention has the following advantages/enhancement effects: 1. Longer life, the core layer and the surface layer are not peeled off. 2. When the user leaves the chair, the elastic cloth will quickly return to its original shape. ^ [Implementation Method] First, as shown in the first figure, 'the first example of the present invention is applied to the elastic yarn (1) of the chair set, which is co-extruded from the core layer (11) and the surface layer (12). The elastic material of the core layer (11) and the surface layer (12) is the same material [such as the thermoplastic plastic elastomer TPEE (Thermalplastic Ester Elastomer)], and the melting point of the core layer (11) is lower than the melting point of the surface layer (12) High, wherein the ratio of the core layer (11) to the surface layer (12) is 9:1 or 8:2 or 7:3, etc. can be implemented. By the way, as shown in the second figure, in the case of heat welding, the surface layer (12) melts and bonds due to the lower melting point, and the core layer (11) is not affected, and the core layer (U) 200806833 and the surface layer (12) The same material is co-extruded, the core layer with high melting point (11) has higher hardness, and the deformation is smaller when subjected to the same force. The surface layer (12) is softer due to lower melting point and lower hardness. When the force is strong, the amount of deformation is large. The surface layer (12) is softer and more easily deformed, while the core layer (11) is harder and easier to return to its original shape. Accordingly, when the plurality of elastic yarns (1) are twisted into an elastic yarn, the elastic yarns may be appropriately heated to melt-bond the elastic yarns (1), or may be appropriately heated after the elastic yarns are knitted into an elastic fabric. As shown in the third figure, the elastic yarn (1A) of the second example of the present invention is formed by co-extruding a core layer (11A) and a surface layer (12A), wherein the core layer (ηa) and the surface layer (12A) are As shown in the fourth circle, the same material elastic material [such as polyester thermoplastic elastomer TPEECThermalplastic Ester
Elastomer)]，.且芯層（11A)之熔點較表層（12A)之熔點 兩’其中芯層（11A)與表層（12A)之比例為9 : 1或8 : 2或 7· 3等均可實施。其使用實施如第一實例所揭露，不贅述。 如第五圖所示，為應用本發明之彈性紗（1)或（1人）編織 成椅具用彈性布（網）之示意圖。則，以此製成之彈性布用 來作為椅具之布面，在承受使用者體重後，可提供較佳之 回復力，亦即，當使用者離開椅具後，彈性布會很快恢復 原形。 【圖式簡單說明】 第一圖係本發明第一實例之剖視圖。 200806833 第二圖係本發明第一實例之熱熔接合之示意圖。 第三圖係本發明第二實例之剖視圖。 第四圖係本發明第二實例之熱熔接合之示意圖。 第五圖係應用本發明之彈性紗編織成椅具用彈性布之示 意圖。 【主要元件符號說明】 (1)彈性紗 （11)芯層 (12)表層 （1A)彈性紗 (11A)芯層 （12A)表層Elastomer)], and the melting point of the core layer (11A) is two than the melting point of the surface layer (12A), wherein the ratio of the core layer (11A) to the surface layer (12A) is 9:1 or 8:2 or 7.3, etc. Implementation. The implementation of the implementation is as disclosed in the first example, and will not be described again. As shown in Fig. 5, a schematic diagram of an elastic fabric (web) for woven into an elastic yarn (1) or (one person) of the present invention is used. Then, the elastic cloth made by the same is used as the cloth surface of the chair, and after receiving the user's weight, a better restoring force can be provided, that is, when the user leaves the chair, the elastic cloth will quickly restore the original shape. . BRIEF DESCRIPTION OF THE DRAWINGS The first drawing is a cross-sectional view of a first example of the present invention. 200806833 The second figure is a schematic view of a hot melt joint of a first example of the present invention. The third drawing is a cross-sectional view of a second example of the present invention. The fourth figure is a schematic view of a hot melt joint of a second example of the present invention. The fifth drawing is an illustration of the use of the elastic yarn of the present invention to woven into an elastic cloth for a chair. [Explanation of main component symbols] (1) Elastic yarn (11) Core layer (12) Surface layer (1A) Elastic yarn (11A) Core layer (12A) Surface layer