200927805 九、發明說明： 【發明所屬之技術領域】 本發明係有關-種特殊發泡材料的製造方法，特別是—種可加快高分 子材料融化速度’並同時延緩發泡劑反應時機之發泡材料的製造方法。 【先前技術】 由於發泡材料符合高緩衝、柔軟、質輕等特性，並能併裝組合成大面 積使用’不僅用於隨處可見之枕頭、座塾、床墊、地塾、鞋材等產品，並 廣泛應麟兒童城場、運動場所、公騎樂區、養老院等需要具有防撞 保護作用之場所。 依照使用之;f同’發泡材料可概分為娜發泡㈣及_發泡材 料等兩種。以歸發賴料而言，在發泡製程技射，闕射混合發泡 劑、架橋舰其絲加賴加峨賴拌，賊人模具巾加縫壓而發泡 成半成品’紐再經冷卻定型，再經裁切、剖片等加卫處理，即得成型為 各種形狀之成品。 隨著環境保護愈受重視，傳統的塑膠材料由於不能被微生物所分解， 已逐漸被淘汰，取而代之的是以澱粉、聚乳酸及纖維蛋白質等原料為基質 製^^出來的生物可分解材料（Biodegradable Materials)。當以生物可分解材 料作為發泡材料之原料，其發泡方式可分為物理發泡與化學發泡兩種。化 學發泡方式主要分成兩階段，第一階段是將化學發泡劑與生物可分解材料 材料高溫捏合，第二階段再將材料在模具内或是常壓下加熱，使化學發泡 劑反應，形成發泡材料；物理發泡方式主要是將液態瓦斯或液態二氧化碳 混入生物可分解材料内，再以高壓射出發泡，此一種方式製程難度較高， 5 200927805 並不適用於大量生產；此種發泡方式可見中華民國公開號第2〇〇51〇479號 發明專利「聚乳酸之發泡方法與其發泡體」及中華民國公開號第2〇〇643〇75 號發明專利「發雜觀酸触奸，雜贿絲子及聚減發泡粒子 成形體」’其中’十華民國公開號第200643075號發明專利將適當比例之聚 乳酸、脂祕-㈣族聚s旨之絲物、成_、與外賴混合在一 起，再將此混合物加人至傳統之壓出財，在適#之溫度與壓力下，加入 適量的高驗態物理舰劑，自塵出機之出口即可獲得發泡成品；中華民 ©國公開號第200643075號發曰月專利以含有乳酸成分單元5〇莫耳％以上之聚 •乳酸作為基材樹脂之樹脂粒子，此外，聚乳酸發泡粒子係以含有乳酸成分 單元5〇莫耳/0以上之聚乳酸作&基材樹脂之發泡粒子，於基材樹脂中含有 聚烯烴壤’且發泡粒子全體之平均氣泡徑$ 1〇_5〇〇吨。 雖然前述專利案提出以生物可分解材料作為發泡材料之原料，並提出 相關製程’其中’中華民國公開號第鳩43〇75號發明專利僅加入習知的 高魏態物理發泡劑於聚乳酸（PLA)，但聚乳酸（pLA)的溶融強度不易 改質成適合這種發泡方式的物性，因此聚乳酸（pLA)改質配方與操作條件 是重點，此一專利並未翻聚乳酸（pLA)改冑配方與操作條件，財華民 國公鴨編則賴舰㈣紐，細舰方式不同， 而且也是使用高驗態物理發泡劑，亦未提出聚乳酸（pLA)改質配方 作條件。 、” 由於聚乳酸（PLA)等生物可分解材料之_ (具有流龜之溫度）超 過19CTC ’ -般化學發泡劑在生物可分解材料之炼點溫度時已作用揮發， 6 200927805 造成無法使生物可分解材料進行發泡，故一般化學發泡方式無法依習知方 法實施。因此，如何解決生物可分解材料之熔點超過發泡劑之最低起始反 應溫度的問題，使生物可分解材料進行發泡，是一個刻不容緩的待解決課 題。 【發明内容】 有鑑於此，本發明提供一種特殊發泡材料之製造方法，以預先添加化 學發泡劑或是物理發泡微球的方式經押出機押出後一階段發泡，避免一般 ❹化學發泡劑在生物可分解材料之熔點溫度時已作用揮發，無法兩階段發泡 之問喊，藉以使生物可分解材料進行發泡。 本發明提出一種特殊發泡材料之製造方法，包含以下步驟：將高分子 材料製成複數粉末：齡獅發泡劑於複數粉末使均自分散；加壓並升高 溫度使複數粉末融化並包覆發泡劑；及恢復常麼而製得發泡材料。 础述說明之同分子材料之溶點（即具有流動性之溫度）為高於發泡劑 之最低反應溫度。 © 基此，高分子材料為有機高分子材料或生物可分解材料，其中，當高 分子材料為生物可分解材料，係可選自聚乙交醋酸（pga)、聚丙交醋酸 (PLA)、聚己_ (pcL)、聚二姐_、聚原酸醋（p〇E)、聚偶鱗氮、 聚醋氨醋、聚野、聚酸肝亞胺共聚物及聚經丁醋及其組合組成之群組中。 再者，發_係選自含亞硝基發泡劑、含贿基發泡劑、含醯胼紐 /包劑3偶氮甲酿胺（AQCA)發泡劑及無機發泡劑所組成之群組中，並可 塗佈包覆層於發細，此外，發泡辦可為物理微球發泡劑。 此外’於製得發泡材料之步驟，更包含：射出/押出發泡材料，並可以 7 200927805 共壓出方式射出至少一層薄膜於發泡材料上，其中，薄膜可位於發泡材料 之二侧面，再者，薄膜係可選自聚丙烯（pp)、聚乙烯（PE)、乙烯-醋酸乙 烯酯（EVA)、熱塑性橡膠（TPR)、乙烯丙烯橡膠(EPR)、聚乙交酯酸(PGA)、 聚丙交酯酸（PLA)、聚己内酯（PCL)、聚二戊烷酮、聚原酸酯（POE)、 聚偶磷氮、聚酯氨酯、聚針、聚酸酐亞胺共聚物及聚羥丁酯及其組合組成 之群組中。 本發明可加快高分子材料融化速度，並同時延後發泡劑反應時機，當 © 發泡劑反應時，氣體已被高壓包覆在熔化後的高分子材料内，當材料進入 常壓環境，壓力釋放造成氣體膨脹即成發泡材料，藉以對熔點高於發泡劑 之起始反應溫度的高分子材料進行發泡，解決習知發泡材料之製程中，因 發泡劑反應溫度較低而使高熔點高分子材料無法發泡之問題，此外，亦可 以共壓出之方式於發泡材料之二側面製成多層薄膜，藉以提供發泡材料更 廣泛的應用範圍。 有關本發明的較佳實施例及其功效，茲配合圖式說明如後。 ® 【實施方式】 如「第1圖」與「第2圖」所示，為本發明揭露—種發泡材料之製造 方法。 本發明之發泡材料之製造方法，包含下列步驟： 步驟1 :將高分子材料製成複數粉末。 首先’先將高分子材料磨成粉末狀而形成複數粉末，平均粒徑在5咖 以下(視爾發泡倍率與發泡綱粒大小調整），藉明加其表面積，其中， 高分子材料為有機高分子材料或生物可分㈣料（BiQdegradabie 200927805200927805 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a method for producing a special foaming material, in particular, a method for accelerating the melting rate of a polymer material and simultaneously delaying the foaming agent reaction timing. The method of manufacturing the material. [Prior Art] Because the foamed material meets the characteristics of high cushioning, softness, light weight, etc., and can be combined and assembled into a large area, it is not only used for pillows, mattresses, mattresses, cellars, shoe materials, etc. And a wide range of Yinglin children's city parks, sports venues, public riding areas, nursing homes and other places that need to have anti-collision protection. According to the use; f and 'foaming materials can be divided into two types: Na foam (four) and _ foam material. In terms of returning the raw materials, in the foaming process, the jetting compound foaming agent, the bridge ship, its silk plus Laijia simmering mix, the thief's mold towel and the sewing pressure and foaming into a semi-finished product 'New and then cooled and shaped, and then After being cut, cut, etc., it can be molded into finished products of various shapes. As environmental protection has become more and more important, traditional plastic materials have been gradually eliminated because they cannot be decomposed by microorganisms. Instead, biodegradable materials based on raw materials such as starch, polylactic acid and fiber protein are used. Materials). When a biodegradable material is used as a raw material of a foaming material, the foaming method can be classified into physical foaming and chemical foaming. The chemical foaming method is mainly divided into two stages. The first stage is to knead the chemical foaming agent and the biodegradable material at a high temperature, and in the second stage, the material is heated in the mold or under normal pressure to react the chemical foaming agent. The foaming material is formed; the physical foaming method mainly mixes liquid gas or liquid carbon dioxide into the biodegradable material, and then foams with high pressure, which is difficult in the process, and 5 200927805 is not suitable for mass production; The foaming method can be found in the invention patent of the Republic of China No. 2, No. 51〇479, the "foaming method of polylactic acid and its foam" and the invention patent of the Republic of China No. 2, No. 643〇75. "Importing a traitor, a bribe and a polystyrene foaming molded body" "Where the invention patent of the 'Tenhua Republic's Publication No. 200643075' will have an appropriate proportion of polylactic acid, fat secret - (four) polyglyphs, into _ Mixed with the foreign reliance, and then add this mixture to the traditional pressure to make money, under the temperature and pressure of the appropriate #, add the appropriate amount of high-dimensional physical ship, from the exit of the machine can be obtained The product is a resin particle containing a lactic acid component of 5 〇 mol% or more of polylactic acid as a base resin, and a polylactic acid expanded particle containing a lactic acid component. The patent of the Chinese patent publication No. 200643075 The unit 5 has a molar amount of 0 or more polylactic acid as the foaming particles of the base resin, and the polyolefin resin is contained in the base resin, and the average bubble diameter of the entire expanded particles is $1 〇 5 ton. Although the aforementioned patent proposes a biodegradable material as a raw material for a foaming material, and proposes a related process 'of which the invention patent of the Republic of China Publication No. 43〇75 is only added to the conventional high-grade physical foaming agent. Lactic acid (PLA), but the melting strength of polylactic acid (pLA) is not easily modified into a physical property suitable for this foaming method. Therefore, polylactic acid (pLA) modification formula and operating conditions are the focus, and this patent does not condense lactic acid. (pLA) modified formula and operating conditions, Caihua Republic of China ducks are based on the ship (four) New Zealand, the different ship methods are different, but also the use of high-physical physical foaming agent, also did not propose polylactic acid (pLA) modified formula for condition. " Because the biodegradable material such as polylactic acid (PLA) has a temperature exceeding 19 CTC' - the chemical blowing agent has been volatilized at the refining point temperature of the biodegradable material, 6 200927805 The biodegradable material is foamed, so the general chemical foaming method cannot be carried out according to a conventional method. Therefore, how to solve the problem that the melting point of the biodegradable material exceeds the minimum initial reaction temperature of the blowing agent enables the biodegradable material to be carried out. Foaming is an urgent problem to be solved. SUMMARY OF THE INVENTION In view of the above, the present invention provides a method for manufacturing a special foaming material, which is extruded in advance by adding a chemical foaming agent or a physical foaming microsphere. After the extrusion, the foam is foamed at a stage to avoid the volatilization of the general chemical foaming agent at the melting temperature of the biodegradable material, and the foaming of the biodegradable material is not possible, so that the biodegradable material is foamed. The manufacturing method of the special foaming material comprises the following steps: forming the polymer material into a plurality of powders: the lion foaming agent in the plurality of powders Self-dispersing at the end; pressurizing and raising the temperature to melt the plurality of powders and coating the foaming agent; and recovering the foaming material as usual. The melting point of the same molecular material (ie, having fluidity) The temperature is higher than the lowest reaction temperature of the blowing agent. © The polymer material is an organic polymer material or a biodegradable material, wherein when the polymer material is a biodegradable material, the polymer material may be selected from the group consisting of Acetic acid (pga), poly-lactide acetic acid (PLA), polyhexyl _ (pcL), poly-second sister _, poly-ortive vinegar (p〇E), poly-arsenic sulphate, poly- vinegar vinegar, poly field, poly-acid liver The group consisting of an imine copolymer and a polybutyl vinegar and a combination thereof. Further, the hair is selected from a nitroso-containing foaming agent, a brittle-containing foaming agent, and a bismuth-containing/packaging agent. A group consisting of a nitrogen-based amine (AQCA) foaming agent and an inorganic foaming agent, and may be coated with a coating layer for fineness. Further, the foaming agent may be a physical microsphere foaming agent. The step of preparing the foaming material further comprises: injecting/extruding the foaming material, and injecting at least one film to foam in a manner of 7 200927805 Wherein, the film may be located on two sides of the foamed material, and further, the film may be selected from the group consisting of polypropylene (pp), polyethylene (PE), ethylene vinyl acetate (EVA), thermoplastic rubber (TPR), Ethylene propylene rubber (EPR), polyglycolide (PGA), polylactide (PLA), polycaprolactone (PCL), polydipentanone, polyorthoester (POE), polyazo phosphate The group consisting of polyester urethane, poly needle, polyanhydride copolymer and polyhydroxybutyl ester, and combinations thereof. The invention can accelerate the melting speed of the polymer material, and at the same time delay the reaction time of the foaming agent, when © When the foaming agent reacts, the gas has been coated with high pressure in the molten polymer material. When the material enters the normal pressure environment, the pressure is released to cause the gas to expand into a foaming material, so that the melting point is higher than the foaming agent. The polymer material at the initial reaction temperature is foamed, and in the process of solving the conventional foaming material, the high melting point polymer material cannot be foamed due to the low reaction temperature of the foaming agent, and the method can also be used in a common manner. The two sides of the foamed material are made into a multilayer film to provide hair A wider range of applications for foam materials. Preferred embodiments of the present invention and their effects are described below in conjunction with the drawings. ® [Embodiment] As shown in "Fig. 1" and "Fig. 2", the present invention discloses a method for producing a foamed material. The method for producing a foamed material of the present invention comprises the following steps: Step 1: The polymer material is made into a plurality of powders. First, the polymer material is ground into a powder to form a plurality of powders, and the average particle size is less than 5 coffees (the expansion ratio of the foam and the size of the foaming particles), and the surface area thereof is added, wherein the polymer material is Organic polymer material or biodivorable (four) material (BiQdegradabie 200927805
Materials) ’其中，當高分子材料為生物可分解材料時，係可選自聚乙交酯 酸（PGA)、聚丙交酯酸（pLA)、聚己内酯（pcL)、聚二戊烷酮、聚原酸 S曰（POE)、聚偶磷氮、聚酯氨酯、聚酐、聚酸酐亞胺共聚物及聚羥丁酯及 其組合組成之群組中。 步驟2 :混合攪拌發泡劑於複數粉末。 將發泡劑與複數粉末依比例混合，發泡劑重量比例約為2%_3〇%並加 以攪拌形成混合物1，並將混合物丨置入壓縮機台5内，其中，高分子材料 ©之熔點（即具有流動性之溫度）為高於發泡劑之最低起始反應溫度。 前述說明之發泡劑係可選自含亞硝基發泡劑、含偶氮基發泡劑、含醯 胼基發泡劑、含偶氮甲醯胺（ADCA)發泡劑及無機發泡綱組成之群組中。 此外，發泡劑可為物理發泡之微球（Micr〇sphere)發泡劑，亦可於混合攪 摔該發泡劑於複數粉末之步驟前，塗佈包覆層於發泡劑，以包覆發泡劑而 形成微球（Microsphere)結構。 於混合勝發鋪於複雜末之步驟，更包含：混合獅發泡助劑於 ©複數粉末。即在齡發麵與高好材料所製狀概粉柄時，亦可同 時混入發泡助劑，使發泡劑、發泡助劑以及複數粉末依比例混合，再加以 攪拌形成混合物。而上賴H祕縣可選自喊鱗、氧化鎮、硬 脂酸鋅、硬脂酸鎂及其混合物。 再者，於混合餅發泡劑於複數粉末之步驟中，亦可加入其他添加劑， 如碳鶴、軟木屑（讀）等增量劑，或是白煙（siliea)、碳煙（喊nblack) 等補強劑。 200927805 此外’在此一步驟中’可加入架橋劑於高分子材料所製成之複數粉末 内，使發泡劑、發泡助劑、架橋劑以及複數粉末混合後，再加以授拌形成 混合物。其中，架橋劑為可選自二異丙苯基過氧化物、2,5_過氧三級丁基_2,5_ 二甲基己烧、硫確及其混合物。再者，架橋之作用亦可經由電子束（Electr〇n Beam)照射複數粉末來達成，其中，電子束係由電子加速器系統輸出。或 可以伽瑪射線（γ-ray)照射複數粉末達成架橋之作用。 步驟3 :加壓並升高溫度使複數粉末融化。 © 當混合物1置入壓縮機台5後，即可藉由壓縮機台5對混合物1加壓， 同時可升高壓縮機台5内之溫度，藉以使複數粉末融化。在高溫高壓的環 境下’可加快高分子材料所製成之複數粉末的融化速度，並同時延後發泡 劑反應時機’使得複數粉末融化而包覆發泡劑。 步驟4 :恢復常壓而製得發泡材料。 此後’經由壓縮機台5之主喷嘴51將混合物1射出/押出，混合物1 的發泡劑在押出機内即開始裂解產生氣體，被高歷壓縮包覆在熔化的高分 Ο V 子材料内，經過出口到常壓狀態下即均勻膨脹，冷卻後即製得發泡材料2。 如「第3圖j所示，壓縮機台5於主噴嘴51之二側分別設有輔助喷嘴 52 ’於主喷嘴51射出/押出發泡材料2時，輔助喷嘴52以共壓出方式射出 薄膜21於發泡材料2之二側面，其中，薄膜係可選自聚丙烯（PP)、聚乙 稀（PE)、乙烯-醋酸乙烯酯（EVA)、熱塑性橡膠（tpr)、乙烯丙烯橡膠 (EPR)、聚乙交酯酸（pGA)、聚丙交醋酸（pLA)、聚己内酯（pCL)、聚 二戊燒酮、聚原酸酯（POE)、聚偶磷氮、聚酯氨酯、聚酐、聚酸酐亞胺共 200927805 聚物及聚經丁醋及其組合組成之群組中，藉以提供發泡材料更廣泛的應用 範圍，如應用於容裝食品或醫療器材。 上述說明中所列舉的内容雖然是以三層共麼出方式於發泡材料之側面 壓製成薄媒為例’但並非用以限制本發明僅是以三層共麼出方式製成薄 膜，亦可視實際產品結構及用途以多層共廢出方式製成薄膜，特此說明。 本發明將高分子材料磨餘核而增加其表面積，吸舰速，可加快 高分子材料融化速度，發泡劑分散在由高分子材料所磨成之複數粉末中， ©㈣可延後發泡航糾機，當發細反糾，氣體6被高壓包覆在熔化 後的高分子材咖，當體進人f壓職，壓力職造成氣麟脹即成發 泡材料，藉以對熔點高於發泡劑之反應溫度的高分子材料進行發泡，不僅 無習知物理發泡所造成製程難度高之問題，同時可解決習知兩階段化學發 泡製程中’因發泡劑起始反應溫度較低而使高分子材料無法發泡之問題， 此外’亦可以共壓出之方式於發泡材料之側邊製成多層薄膜，藉以提供發 泡材料更廣泛的應用範圍。 D 雖然本發明的技術内容已經以較佳實施例揭露如上，然其並非用以限 定本發明’任何熟習此技藝者，在不脫離本發明之精神所作些許之更動與 潤飾，皆應涵蓋於本發明的範疇内，因此本發明之保護範圍當視後附之申 請專利範圍所界定者為準。 11 200927805 【圖式簡單說明】 第1圖為本發明之製造方法的流程圖。 第2圖為本發明於製造時的示意圖。 第3圖為本發明以共壓出方式製造的示意圖。 ，【主要元件符號說明】 1...... 2...... ....發泡材料 21..... • · ••薄膜 5...... ..··壓縮機台 51..... •···主喷嘴 52..... ....輔助喷嘴 〇 12Materials) 'Where, when the polymer material is a biodegradable material, it may be selected from polyglycolide (PGA), polylactide (pLA), polycaprolactone (pcL), polydipentanone Polyurethane S (POE), polyazophosphorus, polyester urethane, polyanhydride, polyanhydride copolymer, polyhydroxybutyl ester and combinations thereof. Step 2: Mix and stir the foaming agent in a plurality of powders. The foaming agent is mixed with the plurality of powders in proportion, the weight ratio of the blowing agent is about 2% _3%, and stirred to form the mixture 1, and the mixture is placed in the compressor table 5, wherein the melting point of the polymer material The temperature (i.e., having a fluidity) is higher than the lowest initial reaction temperature of the blowing agent. The foaming agent described above may be selected from the group consisting of a nitroso-containing blowing agent, an azo-containing blowing agent, a fluorene-containing blowing agent, an azomethine-containing (ADCA) blowing agent, and an inorganic foaming agent. In the group of the group. In addition, the foaming agent may be a physically foamed microsphere (Micr〇sphere) foaming agent, or may be coated with a coating layer on the foaming agent before the step of mixing and stirring the foaming agent in the plurality of powders. The foaming agent is coated to form a microsphere structure. In the step of mixing and finishing, the complex includes: mixing lion foaming aid in © plural powder. That is, in the case of the powdered handle made of the aged hair and the high-quality material, the foaming aid may be mixed at the same time, and the foaming agent, the foaming aid and the plurality of powders are mixed in proportion, and then stirred to form a mixture. The Shangyu H secret county can be selected from the group consisting of shouting scales, oxidized towns, zinc stearate, magnesium stearate and mixtures thereof. Furthermore, in the step of mixing the cake foaming agent into the plurality of powders, other additives such as carbon cranes, cork chips (reading) and the like, or white smoke (siliea), soot (shocking nblack) may also be added. And other reinforcing agents. 200927805 In addition, in this step, a bridging agent may be added to a plurality of powders made of a polymer material, and a foaming agent, a foaming aid, a bridging agent, and a plurality of powders may be mixed and then mixed to form a mixture. Wherein, the bridging agent is selected from the group consisting of dicumyl peroxide, 2,5-peroxytributyl-2,5-dimethylhexanol, sulfur and mixtures thereof. Furthermore, the function of the bridging can also be achieved by irradiating a plurality of powders through an electron beam (Electr〇n Beam), wherein the electron beam is output by the electron accelerator system. Or gamma ray (γ-ray) can be used to illuminate a plurality of powders to achieve bridging. Step 3: Pressurize and raise the temperature to melt the plurality of powders. © When the mixture 1 is placed in the compressor stage 5, the mixture 1 can be pressurized by the compressor stage 5, and the temperature in the compressor stage 5 can be raised, whereby the plurality of powders are melted. In the high temperature and high pressure environment, the melting speed of the plurality of powders made of the polymer material can be accelerated, and at the same time, the reaction time of the foaming agent is delayed, so that the plurality of powders are melted to coat the foaming agent. Step 4: The atmospheric pressure is restored to obtain a foamed material. Thereafter, the mixture 1 is ejected/extruded via the main nozzle 51 of the compressor stage 5, and the blowing agent of the mixture 1 starts to be cracked in the extruder to generate gas, which is coated by the high-altitude compression in the molten high-divided V-sub-material. The foam is uniformly expanded after being subjected to the outlet to a normal pressure state, and the foamed material 2 is obtained after cooling. As shown in "Fig. 3, the compressor stage 5 is provided with auxiliary nozzles 52' on both sides of the main nozzle 51, respectively. When the main nozzle 51 ejects/extenses the foamed material 2, the auxiliary nozzle 52 ejects the film in a co-extrusion manner. 21 on the side of the foamed material 2, wherein the film may be selected from the group consisting of polypropylene (PP), polyethylene (PE), ethylene vinyl acetate (EVA), thermoplastic rubber (tpr), and ethylene propylene rubber (EPR). ), polyglycolide (pGA), polylactide acetate (pLA), polycaprolactone (pCL), polydipentone, polyorthoester (POE), polyazo phosphate, polyester urethane, A group of polyanhydrides, polyanhydrides, 200927805, and butyl vinegar, and combinations thereof, to provide a wider range of applications for foaming materials, such as in foods or medical equipment. Although the contents listed in the three-layer method are used to form a thin medium on the side of the foamed material, the present invention is not limited to the invention, and the film is formed into a film by a three-layer method. And the use of a multi-layer co-discharge method to form a film, which is hereby described. Grinding the core to increase its surface area, speeding up the ship, can speed up the melting of the polymer material, the foaming agent is dispersed in the plurality of powders ground by the polymer material, © (4) can delay the foaming aircraft correction machine, when issued Fine reversal, the gas 6 is coated with high pressure in the molten polymer coffee, when the body enters the person f, the pressure job causes the gas swell to become a foaming material, so that the melting point is higher than the reaction temperature of the blowing agent The foaming of the polymer material not only has the problem of high process difficulty caused by the physical foaming, but also solves the problem of the conventional two-stage chemical foaming process. The problem that the material cannot be foamed, in addition, a multilayer film can be formed on the side of the foamed material in a manner of co-extrusion, thereby providing a wider range of applications of the foamed material. D Although the technical content of the present invention has been better The embodiments are disclosed above, and are not intended to limit the invention. Any modifications and refinements made without departing from the spirit of the invention are intended to be included in the scope of the invention. The scope is defined by the scope of the patent application. 11 200927805 [Simplified illustration of the drawings] Fig. 1 is a flow chart of the manufacturing method of the present invention. Fig. 2 is a schematic view of the present invention at the time of manufacture. The figure is a schematic diagram of the invention manufactured by the common extrusion method. [Description of main component symbols] 1... 2...... .... foaming material 21..... • · • •Film 5.....·Compressor table 51.....•···Main nozzle 52......Auxiliary nozzle〇12