TWI660993B - Bidirectional tearable plastic thin film and the forming method thereof - Google Patents
Bidirectional tearable plastic thin film and the forming method thereof Download PDFInfo
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Abstract
一種雙向易撕的塑膠薄膜,由連續相聚合物、分散相聚合物以及助溶劑所組成,其中連續相聚合物所佔的重量百分比為50%~80%,分散相聚合物所佔的重量百分比為10%~47%,助溶劑所佔的重量百分比為3%~20%,本發明的塑膠薄膜具有平滑表面,並於各方向具有易撕性。 A two-way easily tearable plastic film composed of a continuous phase polymer, a dispersed phase polymer, and a co-solvent, wherein the continuous phase polymer accounts for 50% to 80% by weight and the dispersed phase polymer accounts for weight percentage It is 10% to 47%, and the weight percentage of the co-solvent is 3% to 20%. The plastic film of the present invention has a smooth surface and is easy to tear in all directions.
Description
本發明是有關於一種塑膠薄膜,尤其是指一種具有雙向易撕性的塑膠薄膜及其製造方法。 The invention relates to a plastic film, in particular to a plastic film with two-way easy tearing property and a manufacturing method thereof.
現有的膠帶係於基材上塗布黏著膠材(可塗布於基材的其中一表面或相對的兩表面)以製成單面膠帶或雙面膠帶達到黏著的效果,其中現有的膠帶使用棉紙作為基材。然而棉紙屬於多孔性的材質,當黏著膠材塗布於棉紙上時,黏著膠材會經由棉紙表面的孔洞滲入棉紙內部造成成本的增加,因此有需要開發一種新的膠帶用基材以降低成本的支出。 Existing tapes are coated with adhesive material on the substrate (can be coated on one surface or two opposite surfaces of the substrate) to make a single-sided tape or a double-sided tape to achieve the adhesive effect. Among them, the existing tape uses cotton paper. As a substrate. However, tissue paper is a porous material. When the adhesive material is coated on the tissue paper, the adhesive material will penetrate into the interior of the tissue paper through the holes on the surface of the tissue paper, which will increase the cost. Therefore, there is a need to develop a new base material for adhesive tape. Reduce costs.
另外,現有的藥用或是食材包裝袋大多以低密度聚乙烯為主要材質,低密度聚乙烯本身材質柔軟且具有優良的抗酸鹼特性。然而低密度聚乙烯屬於網狀結構,具有一定的韌性而難以直接撕裂,故將低密度聚乙烯製成藥用包裝袋時仍須借助切割工具才可取出內部的藥材,使用上仍不便利。因此也需要開發一種新的易撕藥用包裝袋材質以提高使用者的便利性。 In addition, most of the existing medicinal or food packaging bags are mainly made of low-density polyethylene. The low-density polyethylene itself is soft and has excellent acid and alkali resistance. However, low-density polyethylene is a net-like structure, which has certain toughness and is difficult to tear directly. Therefore, when making low-density polyethylene into pharmaceutical packaging bags, it is still necessary to use a cutting tool to remove the internal medicinal materials, which is still inconvenient to use . Therefore, there is also a need to develop a new easy-to-tear pharmaceutical packaging material to improve user convenience.
”先前技術”段落只是用來幫助了解本發明內容,因此在“先前技術”段落所揭露的內容可能包含一些沒有構成所屬技術領域中具有通常知識者所知道的習知技術。在“先前技術”段落所揭露的內容,不代表該內容或者 本發明一個或多個實施例所要解決的問題,在本發明申請前已被所屬技術領域中具有通常知識者所知曉或認知。 The "prior art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "prior art" paragraph may include some conventional technologies that do not constitute the ordinary knowledge of those skilled in the art. The content disclosed in the "Prior Art" paragraph does not represent that content or The problem to be solved by one or more embodiments of the present invention has been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.
本發明的主要目的是提供一種具有易撕性的塑膠薄膜,且其塑膠薄膜的撕裂強度低、於各方向上具有易撕性,讓使用者可任意撕取所需要的長度或是寬度。 The main object of the present invention is to provide a plastic film with easy tearing property, and the plastic film has low tear strength and easy tearability in all directions, so that the user can arbitrarily tear the required length or width.
本發明的再一目的在於利用具有易撕性的塑膠薄膜做成密封包裝袋,可以在密封包裝袋內放置需隔離空氣保存的藥材或食材,於取用時,使用者可以在任意方向輕易撕裂密封包裝袋,而拿取放置在包裝袋內的藥材或食材。 Yet another object of the present invention is to make a hermetically sealed packaging bag using a plastic film with easy tearing properties. The medicinal materials or food materials that need to be isolated from the air can be placed in the sealed packaging bag, and the user can easily tear it in any direction when taking it. The sealed packaging bag is cracked, and the medicinal materials or ingredients placed in the packaging bag are taken.
本發明的另一目的在於提供一種表面無孔隙、且具有平滑表面的塑膠薄膜。 Another object of the present invention is to provide a plastic film with no pores on the surface and a smooth surface.
本發明的又一目的在於利用表面無孔隙、且具有平滑表面的塑膠薄膜做為膠帶的基材可以節省膠材的成本。 Another object of the present invention is to use a plastic film with no pores on the surface and a smooth surface as the base material of the adhesive tape to save the cost of the adhesive material.
本發明的更一目的在於利用表面無孔隙、且具有平滑表面的塑膠薄膜做為單面膠帶或是雙面膠帶。 A further object of the present invention is to use a plastic film with no pores on the surface and a smooth surface as a single-sided tape or a double-sided tape.
根據上述目的,本發明揭露一種塑膠薄膜,由連續相聚合物、分散相聚合物及助溶劑所組成,其中連續相聚合物所佔的重量百分比為50%~80%,分散相聚合物所佔的重量百分比為10%~47%,助溶劑所佔的重量百分比為3%~20%,且塑膠薄膜的撕裂強度低、具有平滑表面,並於各方向具有易撕性。 According to the above object, the present invention discloses a plastic film composed of a continuous phase polymer, a dispersed phase polymer, and a co-solvent, wherein the weight percentage of the continuous phase polymer is 50% to 80%, and the dispersed phase polymer accounts for The weight percentage is 10% ~ 47%, the weight percentage of the co-solvent is 3% ~ 20%, and the tear strength of the plastic film is low, the surface is smooth, and it is easy to tear in all directions.
根據上述,本發明還揭露一種塑膠薄膜的製造方法,其包括:提供連續相聚合物、分散相聚合物以及助溶劑,其中連續相聚合物的重量百 分比為50%~80%、分散相聚合物的重量百分比為10%~47%以及助溶劑的重量百分比為3%~20%。接著,將連續相聚合物、分散相聚合物以及助溶劑在室溫的條件下進行預混合製程,以形成第一混合物。再接著,對第一混合物進行混煉製程,使得第一混合物可以均勻混合以形成第二混合物。對第二混合物進行造粒製程,形成多個粒子。最後,對這些粒子進行吹膜製程或流延製程,形成具有無方向性與易撕性的塑膠薄膜。 According to the above, the present invention also discloses a method for manufacturing a plastic film, which includes: providing a continuous phase polymer, a dispersed phase polymer, and a co-solvent, wherein the weight of the continuous phase polymer is 100%. The proportion is 50% to 80%, the weight percentage of the dispersed phase polymer is 10% to 47%, and the weight percentage of the co-solvent is 3% to 20%. Next, the continuous phase polymer, the dispersed phase polymer, and the co-solvent are subjected to a pre-mixing process at room temperature to form a first mixture. Then, the first mixture is subjected to a kneading process so that the first mixture can be uniformly mixed to form a second mixture. A granulation process is performed on the second mixture to form a plurality of particles. Finally, these particles are subjected to a film blowing process or a casting process to form a plastic film with non-directionality and easy tearing.
10‧‧‧提供連續相聚合物、分散相聚合物以及助溶劑 10‧‧‧Provide continuous phase polymer, dispersed phase polymer and co-solvent
12‧‧‧執行預混合步驟,將連續相聚合物、分散相聚合物以及助溶劑進行預混合製程,形成第一混合物 12‧‧‧ Perform a pre-mixing step to pre-mix the continuous phase polymer, dispersed phase polymer, and co-solvent to form a first mixture
14‧‧‧執行混煉步驟,對第一塑料混合物進行混煉以形成第二塑料混合物 14‧‧‧ performs a kneading step to knead a first plastic mixture to form a second plastic mixture
16‧‧‧執行造粒步驟,對第二塑料混合物進行造粒以形成多個塑料粒子 16‧‧‧ Perform a granulation step to granulate a second plastic mixture to form a plurality of plastic particles
18‧‧‧執行吹膜製程,對塑料粒子進行吹膜以形成塑膠薄膜 18‧‧‧Performed a film blowing process to blow plastic particles to form a plastic film
20、30‧‧‧包裝袋 20, 30‧‧‧ packing bags
22、32‧‧‧袋體 22, 32‧‧‧ bag body
24、38‧‧‧封口材 24, 38‧‧‧Sealing material
222、340‧‧‧交界處 222, 340‧‧‧ Junction
224、226、342、344‧‧‧袋體的任一處 224, 226, 342, 344‧‧‧ anywhere
322、42‧‧‧塑膠薄膜 322, 42‧‧‧plastic film
324、326‧‧‧聚乙烯層 324, 326‧‧‧ polyethylene layer
40‧‧‧膠帶 40‧‧‧Tape
50‧‧‧塗膠 50‧‧‧ rubber coated
60‧‧‧雙面膠帶 60‧‧‧ Double-sided tape
70‧‧‧離型紙 70‧‧‧ release paper
圖1是根據本發明所揭露的技術,表示塑膠薄膜的製造流程圖;圖2A是根據本發明所揭露的技術,表示棉紙的表面孔隙度的SEM圖;圖2B是根據本發明所揭露的技術,表示塑膠薄膜的表面孔隙度的SEM圖;圖3A是根據本發明所揭露的技術,利用塑膠薄膜製作成包裝袋的一實施例的示意圖;圖3B是根據本發明所揭露的技術,利用塑膠薄膜製作成包裝袋的另一實施例的示意圖;圖4是根據本發明所揭露的技術,表示捲筒型的單面膠帶的一實施例的示意圖;以及圖5是根據本發明所揭露的技術,表示捲筒型的雙面膠帶的一實施例的示意圖。 FIG. 1 is a flowchart showing the manufacturing process of a plastic film according to the technology disclosed in the present invention; FIG. 2A is a SEM diagram showing the surface porosity of a tissue paper according to the technology disclosed in the present invention; Technology, which shows the SEM image of the surface porosity of a plastic film; Figure 3A is a schematic diagram of an embodiment of using a plastic film to make a packaging bag according to the technology disclosed in the present invention; Figure 3B is a technology disclosed in the present invention, using A schematic diagram of another embodiment of a packaging bag made of a plastic film; FIG. 4 is a schematic diagram illustrating an embodiment of a roll-type single-sided tape according to the technology disclosed in the present invention; and FIG. 5 is a schematic view of the disclosed bag according to the present invention The technology is a schematic diagram showing an embodiment of a roll-type double-sided tape.
有關本發明之前述及其他技術內容、特點與功效,在以下配合參考圖式之一較佳實施例的詳細說明中,將可清楚的呈現。以下實施例中所 提到的方向用語,例如:上、下、左、右、前或後等,僅是參考附加圖式的方向。因此,使用的方向用語是用來說明並非用來限制本發明。 The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The following examples The terms of direction, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.
首先請參考圖1,圖1為根據本發明所揭露的技術,表示塑膠薄膜的製造流程圖。在圖1中,步驟10,提供連續相聚合物、分散相聚合物以及助溶劑,其中連續相聚合物與分散相聚合物兩者不互溶,助溶劑為增加連續相聚合物與分散相聚合物之間相溶性的物質。在此步驟中,塑膠薄膜的組成成份及比例為連續相聚合物的重量百分比為50%~80%、分散相聚合物重量百分比為10%~47%,助溶劑的重量百分比為3%~20%。較佳地,於另一實施例中,塑膠薄膜的組成成份及比例為:連續相聚合物的重量百分比為55%~75%,分散相聚合物的重量百分比為15%~40%,助溶劑的重量百分比為5%~10%。本實施例中,連續相聚合物選自聚烯烴系化合物和聚酯系化合物構成的群組,分散相聚合物選自聚苯乙烯、烯烴類共聚物,環聚烯烴系化合物和聚酯系化合物所構成的群組。此外,聚烯烴系化合物可以是聚乙烯、聚丙烯、聚氧乙烯、聚苯乙烯或乙烯-醋酸乙烯酯共聚物,助溶劑為苯乙烯彈性體,例如苯乙烯-乙烯/二烯塊狀共聚物(SEBS,styrene butadiene styrene block copolymer)或苯乙烯-丁二烯-苯乙烯共聚物(SBS,styrene-butadiene-styrene copolymer)。在本發明的較佳實施例中,助溶劑的目的是將連續相聚合物與分散相聚合物快速結合並且增加溶解度,其中較佳的是利用苯乙烯-乙烯/二烯塊狀共聚物,可以與連續相聚合物、分散相聚合物混合形成材質撕裂強度較低的塑膠薄膜。 First, please refer to FIG. 1, which is a flowchart of manufacturing a plastic film according to the technology disclosed in the present invention. In FIG. 1, step 10 provides a continuous phase polymer, a dispersed phase polymer, and a co-solvent, wherein the continuous phase polymer and the dispersed phase polymer are incompatible with each other. The co-solvent is to increase the continuous phase polymer and the dispersed phase polymer. Miscible substances. In this step, the composition and proportion of the plastic film are 50% to 80% by weight of the continuous phase polymer, 10% to 47% by weight of the dispersed phase polymer, and 3% to 20% by weight of the co-solvent. %. Preferably, in another embodiment, the composition and proportion of the plastic film are: the weight percentage of the continuous phase polymer is 55% to 75%, the weight percentage of the dispersed phase polymer is 15% to 40%, and the cosolvent The weight percentage is 5% ~ 10%. In this embodiment, the continuous phase polymer is selected from the group consisting of polyolefin compounds and polyester compounds, and the dispersed phase polymer is selected from polystyrene, olefin copolymers, cyclic polyolefin compounds, and polyester compounds. A group of people. In addition, the polyolefin-based compound may be polyethylene, polypropylene, polyoxyethylene, polystyrene, or an ethylene-vinyl acetate copolymer, and the co-solvent is a styrene elastomer, such as a styrene-ethylene / diene block copolymer. (SEBS, styrene butadiene styrene block copolymer) or styrene-butadiene-styrene copolymer (SBS). In a preferred embodiment of the present invention, the purpose of the co-solvent is to quickly combine the continuous phase polymer with the dispersed phase polymer and increase the solubility. Among them, it is preferable to use a styrene-ethylene / diene block copolymer. Mixed with continuous phase polymer and dispersed phase polymer to form a plastic film with low tear strength.
接著,步驟12,執行預混合步驟,將連續相聚合物、分散相聚合物以及助溶劑進行預混合製程,形成第一混合物。在步驟12中,將連續相聚合物、分散相聚合物以及助溶劑分別置入混合器內,在室溫的條件下,以100rpm~200rpm的轉速進行10分鐘~15分鐘的預混合步驟以得到第一塑 料混合物,然而本發明並不以此為限,連續相聚合物、分散相聚合物以及助溶劑也可以輔以其他適宜的操作條件得到第一塑料混合物。 Next, in step 12, a premixing step is performed, and a continuous phase polymer, a dispersed phase polymer, and a co-solvent are subjected to a premixing process to form a first mixture. In step 12, the continuous phase polymer, the dispersed phase polymer, and the co-solvent are respectively placed in a mixer, and a premixing step of 10 minutes to 15 minutes is performed at a speed of 100 rpm to 200 rpm at room temperature. First plastic However, the present invention is not limited thereto. The continuous phase polymer, the dispersed phase polymer, and the co-solvent can also be supplemented with other suitable operating conditions to obtain the first plastic mixture.
緊接著,步驟14,執行混煉步驟,對第一塑料混合物進行混煉以形成第二塑料混合物。在此步驟中,將步驟12所得到的第一塑料混合物置入螺桿混煉機中進行再混合,其目的是為了將第一塑料混合物中的聚烯烴系化合物、聚苯乙烯以及助溶劑充分混合均勻。另外,於此步驟中,螺桿混煉機可以是單螺桿混煉機或是雙螺桿混煉機,在本發明的較佳實施例中是利用雙螺桿混煉機來完成此步驟14的混合製程。接下來於步驟16,執行造粒步驟,對第二塑料混合物進行造粒以形成多個塑料粒子。在步驟16中,利用常見的塑料造粒(或是稱為塑料抽粒)的方式,先將對第二塑料混合物置於料桶中,經加熱後將第二塑料混合物經由擠壓而形成條狀,此步驟即是所謂的抽絲。接著,再將這些條狀的塑料經過冷卻步驟,最後把這些條狀的塑料切割成一顆一顆的塑料粒子,即完成造粒步驟。 Next, in step 14, a kneading step is performed to knead the first plastic mixture to form a second plastic mixture. In this step, the first plastic mixture obtained in step 12 is placed in a screw kneader for re-mixing. The purpose is to thoroughly mix the polyolefin-based compound, polystyrene, and co-solvent in the first plastic mixture. Even. In addition, in this step, the screw mixer can be a single screw mixer or a twin screw mixer. In the preferred embodiment of the present invention, the twin screw mixer is used to complete the mixing process of step 14 . Next, in step 16, a granulation step is performed to granulate the second plastic mixture to form a plurality of plastic particles. In step 16, a common plastic granulation (also known as plastic pumping) method is used to first place the second plastic mixture in a bucket, and after heating, the second plastic mixture is extruded to form a bar. This step is the so-called spinning. Then, the strip-shaped plastic is subjected to a cooling step, and finally the strip-shaped plastic is cut into plastic particles one by one, thereby completing the granulation step.
接著,步驟18,執行吹膜(blown film)製程,對塑料粒子進行吹膜以形成塑膠薄膜。在此步驟中,將由步驟16中所得到的多顆塑料粒子置入吹膜擠押成型機,接著,將這些塑料粒子熔融之後,這些熔融的塑料進入模具的模頭,在模頭內先經螺型流道導引成圓形膜管之後,經由模唇區押出圓形膜管,經由膜管內的空氣吹脹,引取滾輪向上引取以及外圍冷卻風的冷卻作用而形成圓管狀的膠膜,此膠膜即為本發明所揭露的塑膠薄膜。 Next, in step 18, a blown film process is performed to blown the plastic particles to form a plastic film. In this step, a plurality of plastic particles obtained in step 16 are placed in a blown film extrusion molding machine. After the plastic particles are melted, the molten plastic enters the die head of the mold, and passes through the die head first. After the spiral flow channel is guided into a circular film tube, the circular film tube is extruded through the die lip area, blown by the air in the film tube, taken up by the take-up roller and cooled by the peripheral cooling air to form a circular tube-shaped film. This film is the plastic film disclosed in the present invention.
要說明的是,滾輪對膜管向上引取的速度(v1)與溶膠自模頭出口湧出的速度(v2)不同,一般拉伸速度比(v1/v2)約為1~5倍,因此對膜產生強烈的拉伸,使得塑膠薄膜的厚度變薄。另外,塑膠薄膜的厚度可以利用膜厚自動監測、冷卻風量及溫度來修正塑膠薄膜的厚度。因此,塑膠薄膜的厚度可以隨著拉伸速度比(v1/v2)以及膜厚自動監測、風環風量及溫度來調整 所需要的塑膠薄膜的厚度。在本發明的實施例中,塑膠薄膜的厚度約為20μm~100μm。另外,在前述的步驟18是利用吹膜製程來形成本發明所揭露的塑膠薄膜,於另一較佳實施例中是利用流延法(casting)來形成塑膠薄膜,其中流延法亦為業界常使用的塑料成膜的製程,在此不再多加陳述。 It should be noted that the speed (v1) of the roller pulling the film tube upward is different from the speed (v2) of the sol emerging from the die exit. Generally, the stretching speed ratio (v1 / v2) is about 1 to 5 times. Produces strong stretching, making the thickness of the plastic film thinner. In addition, the thickness of the plastic film can be corrected by automatic film thickness monitoring, cooling air volume, and temperature. Therefore, the thickness of the plastic film can be adjusted with the stretching speed ratio (v1 / v2) and automatic monitoring of the film thickness, air volume and temperature of the wind ring The required thickness of the plastic film. In the embodiment of the present invention, the thickness of the plastic film is about 20 μm to 100 μm. In addition, in the aforementioned step 18, a plastic film disclosed in the present invention is formed by using a blown film process. In another preferred embodiment, a plastic film is formed by casting, wherein the casting method is also in the industry. The commonly used plastic film forming process will not be described here.
根據圖1的製程步驟所形成的塑膠薄膜由於是透過連續相聚合物與分散相聚合物這兩種互不相容的高分子聚合物相互混合,再加入助溶劑進行物理特性的調整,因此其撕裂強度低,且此塑膠薄膜無方向性,也就是說塑膠薄膜在各方向上可以容易撕裂。根據上述材料特性,使得本發明所揭露的塑膠薄膜可以應用於一次性使用的包裝材或是做為膠帶的基材,方便使用者將包裝材撕裂或是由被貼附物上撕下。 The plastic film formed according to the process steps of FIG. 1 is mixed with two mutually incompatible macromolecules, continuous phase polymer and dispersed phase polymer, and the co-solvent is added to adjust the physical properties. The tear strength is low, and the plastic film is non-directional, which means that the plastic film can easily tear in all directions. According to the above-mentioned material characteristics, the plastic film disclosed in the present invention can be applied to a disposable packaging material or as a base material of an adhesive tape, which is convenient for a user to tear the packaging material or to tear off the attached object.
接著,請同時參考圖2A及圖2B。圖2A是根據本發明所揭露的技術,表示現有技術中,棉紙的表面孔隙度的SEM圖及圖2B是根據本發明所揭露的技術,表示本發明的塑膠薄膜的表面孔隙度的SEM圖。由圖2A及圖2B,在200μm的解析度下,可以很明顯的看出棉紙的表面的孔隙度分布。而在相同的解析度下,本發明的塑膠薄膜的表面孔隙度相較於棉紙的表面孔隙度低,且可以視為平滑表面。 Please refer to FIG. 2A and FIG. 2B at the same time. FIG. 2A is a SEM image showing the surface porosity of cotton paper in the prior art and FIG. 2B is a SEM image showing the surface porosity of the plastic film of the present invention according to the technology disclosed in the present invention . From FIG. 2A and FIG. 2B, at a resolution of 200 μm, the porosity distribution on the surface of the cotton paper can be clearly seen. Under the same resolution, the surface porosity of the plastic film of the present invention is lower than the surface porosity of the cotton paper, and can be regarded as a smooth surface.
接著請參考圖3A,圖3A是根據本發明所揭露的技術,表示利用塑膠薄膜製作成包裝袋的一實施例的示意圖。在圖3A中,包裝袋20包括封口材24以及袋體22,其中由圖1的製程流程所形成的塑膠薄膜來做為包裝袋20的袋體22。在本實施例中,由於包裝袋20具有平滑的表面,即意謂著袋體22的表面沒有孔隙,具有良好的空氣隔離性。因此,利用袋體22的材質特性,將需要保存的藥材或是食材可以放置在此袋體22內,再利用以熱塑性塑膠做為封口材24的材質,於袋體22的開口處進行密封,以達到保存藥材或是食材的目的。而使用者要使用包裝袋20內的藥材或是食材時,由於袋 體22的材料無方向性且撕裂強度低、易撕性高,因此可以直接由封口材24與袋體22的交界處222或是袋體22的任一處224、226直接撕破,而不需要借助刀片或是剪刀等切割工具,即可將封口材24與袋體22分開而取出置於袋體22內的藥材或是食材。 Please refer to FIG. 3A. FIG. 3A is a schematic diagram illustrating an embodiment of using a plastic film to make a packaging bag according to the disclosed technology. In FIG. 3A, the packaging bag 20 includes a sealing material 24 and a bag body 22. The plastic film formed by the manufacturing process in FIG. 1 is used as the bag body 22 of the packaging bag 20. In this embodiment, since the packaging bag 20 has a smooth surface, which means that the surface of the bag body 22 has no pores, it has good air barrier properties. Therefore, by using the material characteristics of the bag body 22, the medicinal materials or food materials to be stored can be placed in the bag body 22, and then the thermoplastic plastic is used as the material of the sealing material 24 to seal the opening of the bag body 22. In order to achieve the purpose of preserving medicinal materials or ingredients. When the user wants to use the medicinal materials or ingredients in the packaging bag 20, The material of the body 22 is non-directional, has low tear strength, and is easy to tear. Therefore, it can be directly torn from the junction 222 of the sealing material 24 and the bag body 22 or any of the bags 224 and 226, and Without using a cutting tool such as a blade or scissors, the sealing material 24 can be separated from the bag body 22 and the medicinal materials or food materials placed in the bag body 22 can be taken out.
接著請參考圖3B。圖3B是根據本發明所揭露的技術,表示利用塑膠薄膜製作成包裝袋的另一實施例的截面示意圖。在前述圖3A中的包裝袋20僅利用單一層的塑膠薄膜來做為包裝袋20的袋體22。在圖3B中,包裝袋30的袋體32是由前述圖1的製程流程所形成的塑膠薄膜322以及在塑膠薄膜322內層及外層的聚乙烯(PE)層324、326所組成。在本實施例中,在袋體32的內、外層增加聚乙烯層324、326可以加強包裝袋30整體的硬度。另外,與圖3A所述的袋體22相同,包裝袋30利用以熱塑性塑膠做為封口材38的材質,於袋體32的開口處進行密封,以達到保存藥材或是食材的目的。而使用者要使用包裝袋30內的藥材或是食材時,由於袋體32的材料無方向性且撕裂強度低、易撕性高,因此可以直接由封口材38與袋體32的交界處340或是袋體32的任一處342、344直接撕破,而不需要借助刀片或是剪刀等切割工具,即可將封口材38與袋體32分開而取出置於袋體32內的藥材或是食材。 Please refer to FIG. 3B. 3B is a schematic cross-sectional view illustrating another embodiment of a packaging bag made of a plastic film according to the technology disclosed in the present invention. In the aforementioned packaging bag 20 in FIG. 3A, only a single layer of plastic film is used as the bag body 22 of the packaging bag 20. In FIG. 3B, the bag body 32 of the packaging bag 30 is composed of the plastic film 322 and the polyethylene (PE) layers 324 and 326 formed on the inner layer and the outer layer of the plastic film 322. In this embodiment, adding polyethylene layers 324 and 326 to the inner and outer layers of the bag body 32 can strengthen the overall rigidity of the packaging bag 30. In addition, similar to the bag body 22 described in FIG. 3A, the packaging bag 30 uses thermoplastic as the material of the sealing material 38 and is sealed at the opening of the bag body 32 to achieve the purpose of storing medicinal materials or food materials. When the user wants to use the medicinal materials or food ingredients in the packaging bag 30, since the material of the bag body 32 is non-directional, the tear strength is low, and the tearability is high, it can be directly from the junction of the sealing material 38 and the bag body 32. 340 or any place 342 and 344 of the bag body 32 can be torn directly, without the need of cutting tools such as a blade or scissors, the sealing material 38 can be separated from the bag body 32 and the medicinal materials placed in the bag body 32 can be taken out. Or ingredients.
在此要說明的是,無論是圖3A或是圖3B中所揭露的袋體22、32中置放的內容物不限於本實施例所陳述的藥材或是食材,也可以是需要與空氣隔離而保存的物件。而在本實施例中作為包裝袋20、30的封口材24、38的材質可以是熱塑性塑膠,其中熱塑性塑膠例如聚乙烯(PE)、聚丙烯(PP)、聚苯乙烯(PS)、ABS樹脂、聚氯乙烯(PVC)、壓克力樹脂、尼龍(PA)、POM、聚碳酸酯(PC)、氟類樹脂、纖維素類樹脂或是聚乙烯對苯二甲酸酯(PET)。而上述封口材24、38的材質可以視包裝袋20、30要置放的內容物來選擇, 如果置放的內容物為食用性的藥材或是食材,則可以選用聚乙烯(PE)或是聚丙烯(PP),或是置放於包裝袋20、30內的內容物為非食用性的,則可以選擇聚苯乙烯(PS)、ABS樹脂、聚氯乙烯(PVC)、壓克力樹脂、尼龍(PA)、POM、聚碳酸酯(PC)、氟類樹脂、纖維素類樹脂或是聚乙烯對苯二甲酸酯(PET),但上述的選擇僅為說明,並不在本發明的限制中。據此,以塑膠薄膜製成的包裝袋20、30的袋體22、32相較於現有利用聚乙烯所做成的包裝袋,可以讓使用者在拆封時不再需要借助剪刀或是刀片等切割工具,即可沿著封口材24與袋體22的交界處222或是封口材38與袋體32的交界處340可以輕易地撕開袋體22、32,提高使用的便利性。 It is to be noted here that whether the contents placed in the bag bodies 22 and 32 disclosed in FIG. 3A or FIG. 3B are not limited to the medicinal materials or food materials described in this embodiment, but also need to be isolated from the air. And saved objects. In this embodiment, the materials used as the sealing materials 24 and 38 of the packaging bags 20 and 30 may be thermoplastics. The thermoplastics are, for example, polyethylene (PE), polypropylene (PP), polystyrene (PS), and ABS resin. , Polyvinyl chloride (PVC), acrylic resin, nylon (PA), POM, polycarbonate (PC), fluorine resin, cellulose resin or polyethylene terephthalate (PET). The material of the sealing materials 24 and 38 can be selected according to the contents to be placed in the packaging bags 20 and 30. If the contents are edible medicinal materials or ingredients, you can choose polyethylene (PE) or polypropylene (PP), or the contents placed in the packaging bags 20, 30 are non-edible , You can choose polystyrene (PS), ABS resin, polyvinyl chloride (PVC), acrylic resin, nylon (PA), POM, polycarbonate (PC), fluorine resin, cellulose resin or Polyethylene terephthalate (PET), but the above selection is for illustration only and is not within the limits of the present invention. According to this, compared with the existing packaging bags made of polyethylene, the packaging bodies 22 and 32 of the packaging bags 20 and 30 made of plastic film can eliminate the need for users to use scissors or blades when unpacking. Such as cutting tools, the bag body 22, 32 can be easily torn along the junction 222 of the sealing material 24 and the bag body 22 or the junction 340 of the sealing material 38 and the bag body 32, improving the convenience of use.
接著請參考圖4。圖4是根據本發明所揭露的技術,表示膠帶的示意圖。在圖4中,膠帶40包括做為基材的塑膠薄膜42以及塗膠50,且塗膠50塗覆在塑膠薄膜42的一表面上,其可以製作成一捲筒狀。於此實施例中,塗膠50例如是膠水或是壓敏性黏膠。由前述的圖2B的塑膠薄膜的SEM圖可以得知,由於塑膠薄膜42的表面無孔隙度(或是孔隙度小)或可視為平滑表面,當塗膠50塗覆在塑膠薄膜42上之後不會如現有技術中,以棉紙做為膠帶的基材會產生大量的(或是大孔徑的)孔隙。由於棉紙的表面具有較大的孔隙度,當塗膠塗覆於棉紙時,部份的塗膠會滲入棉紙的孔隙內,因此需要塗覆較厚的塗膠來確保棉紙表面的塗膠的厚度,而確保膠帶的黏著,然而增加塗膠的厚度也增加了塗膠的成本。而本發明的塑膠薄膜42由於表面無孔隙度,因此塗膠50塗覆於塑膠薄膜42的表面之後不會滲入塑膠薄膜42內,使得塗膠50塗覆在塑膠薄膜42的厚度,可以由現有技術中的25μm-30μm降低至15μm-20μm,其節省塗膠50的塗覆量達20%-25%,可以大幅的減少塗膠50的成本,使得製作膠帶的成本也相對的降低。 Please refer to FIG. 4. FIG. 4 is a schematic diagram showing an adhesive tape according to the disclosed technology. In FIG. 4, the adhesive tape 40 includes a plastic film 42 as a base material and a glue 50. The glue 50 is coated on a surface of the plastic film 42, and can be made into a roll shape. In this embodiment, the glue 50 is, for example, glue or pressure-sensitive adhesive. It can be known from the SEM image of the plastic film of FIG. 2B that the surface of the plastic film 42 has no porosity (or small porosity) or can be regarded as a smooth surface. As in the prior art, cotton paper is used as the substrate of the tape to generate a large number (or large pores) of pores. Because the surface of the cotton paper has a large porosity, when the rubber is coated on the cotton paper, some of the rubber will penetrate into the pores of the cotton paper. Therefore, a thicker rubber needs to be applied to ensure the surface of the cotton paper. The thickness of the glue to ensure the adhesion of the tape, however, increasing the thickness of the glue also increases the cost of glue. Since the surface of the plastic film 42 of the present invention has no porosity, the glue 50 will not penetrate into the plastic film 42 after being coated on the surface of the plastic film 42, so that the thickness of the glue 50 coated on the plastic film 42 can be obtained from the existing In the technology, 25μm-30μm is reduced to 15μm-20μm, which saves the coating amount of the glue 50 by 20% -25%, which can greatly reduce the cost of the glue 50, so that the cost of making the tape is relatively reduced.
另外,當膠帶做為捲筒形狀時,由於膠帶的基材為塑膠薄膜,其撕裂強度低、具有易撕性,當使用者在使用時,可以任意由膠帶的任意方向由捲筒膠帶40上撕下而貼在被貼物件上。舉例來說,搬家公司在搬家具時,特別是針對有門或是抽屜的櫃子或是書桌,都會利用膠帶將這些容易在搬動的過程中移動或是轉動的門或是抽屜予以固定,但是一般的膠帶都不易撕下,都需要利用剪裁工具例如剪刀或是刀片才能撕取需要的尺寸大小,因此在使用上稍嫌不便。而利用本發明所揭露的塑膠薄膜所製作的膠帶40由於其材質的撕裂強度低、於各方向上具易撕性,即可以由圖4中的虛線所表示的位置任意撕下,因此方便使用者由捲筒膠帶40上撕下所要的長度而貼附於這些家具的門或是抽屜上而予以固定。又由於膠帶40具有易撕性,當要從這些家具的門或是抽屜上撕下膠帶40時,也較一般的膠帶容易由家具上撕下,對於使用者來說相當的方便。要說明的是,圖4中的虛線並非為限定只有在該位置才可以撕下,僅表示任意位置的示意圖。 In addition, when the tape is in the shape of a roll, since the base material of the tape is a plastic film, its tear strength is low and it is easy to tear. When the user is using the tape, the tape 40 Tear off and attach to the object. For example, when moving companies move furniture, especially for cabinets or desks with doors or drawers, they use tape to fix those doors or drawers that are easy to move or turn during the moving process, but Generally, the adhesive tape is not easy to remove, and it is necessary to use a cutting tool such as scissors or a blade to remove the required size, so it is slightly inconvenient to use. The adhesive tape 40 made of the plastic film disclosed in the present invention has low tear strength and is easy to tear in all directions, that is, it can be arbitrarily removed from the position indicated by the dotted line in FIG. 4, which is convenient. A user tears a desired length from the roll tape 40 and attaches it to a door or drawer of these furnitures and fixes it. Because the adhesive tape 40 is easy to tear, when the adhesive tape 40 is to be removed from the door or drawer of these furnitures, it is easier to tear off the furniture than ordinary adhesive tapes, which is quite convenient for users. It should be noted that the dotted line in FIG. 4 is not limited to that, and can only be torn off at this position, but only a schematic diagram showing an arbitrary position.
接著,請參考圖5。圖5是根據本發明所揭露的技術,表示捲筒型雙面膠帶的示意圖。在圖5中,雙面膠帶60包括做為基材的塑膠薄膜42以及塗膠50,且塗膠50塗覆在塑膠薄膜42的上、下表面上,同樣的,此雙面膠帶60亦可以製作成一捲筒狀。於此實施例中,塗膠50與前述相同,其區別在於,為了達到雙面膠帶60也具有易撕性,於其中一層塗膠50上再貼覆一層離型紙70,使得整個雙面膠帶60可以達到最佳的易撕性,以方便使用者使用。同樣的,在圖5中的虛線並非為限定只有在該位置才可以撕下,僅表示任意位置的示意圖。另外,對於離型紙70的材質及製作方式並非為本發明的主要技術特徵,在此不多加陳述。 Please refer to FIG. 5. FIG. 5 is a schematic diagram showing a roll-type double-sided tape according to the technology disclosed in the present invention. In FIG. 5, the double-sided adhesive tape 60 includes a plastic film 42 and a glue 50 as a base material, and the glue 50 is coated on the upper and lower surfaces of the plastic film 42. Similarly, the double-sided tape 60 may also be used. Made into a roll. In this embodiment, the adhesive 50 is the same as described above. The difference is that in order to achieve the double-sided adhesive tape 60 also being easy to tear, a layer of release paper 70 is applied on one of the adhesive 50 to make the entire double-sided adhesive tape 60. Can achieve the best tearability for user convenience. Similarly, the dashed line in FIG. 5 is not intended to limit the tear off only at this position, but only a schematic diagram showing an arbitrary position. In addition, the material and manufacturing method of the release paper 70 are not the main technical features of the present invention, and no further description is given here.
因此,根據以上各實施例,為了進一步的顯示出本發明所揭露的單面膠帶、雙面膠帶相對於現有技術中的聚乙烯薄膜具有較佳的易撕性,
針對各薄膜在縱向(machine direction,MD)及橫向(transverse direction,TD)進行斷裂強度、抗拉強度、伸長率及撕裂強度來比較,如表所示:
惟以上所述者,僅為本發明之較佳實施例而已,當不能以此限定本發明實施之範圍,即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾,皆仍屬本發明專利涵蓋之範圍內。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外,摘要部分和標題僅是用來輔助專利文件搜尋之用,並非用來限 制本發明之權利範圍。再者,說明書中提及的第一、第二...等,僅用以表示元件的名稱,並非用來限制元件數量上的上限或下限。 However, the above are only the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, the simple equivalent changes and modifications made according to the scope of the patent application and the description of the invention, All are still within the scope of the invention patent. In addition, any embodiment of the present invention or the scope of patent application does not need to achieve all the purposes or advantages or features disclosed by the invention. In addition, the abstract section and title are only used to assist the search of patent documents and are not intended to limit The scope of the right to make the invention. Moreover, the first, second, etc. mentioned in the description are only used to indicate the names of the components, and are not used to limit the upper or lower limit on the number of components.
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US6045902A (en) * | 1992-11-06 | 2000-04-04 | Daicel Chemical Industries Ltd. | Easy tearable films and method of producing the same |
CN1972800A (en) * | 2004-04-30 | 2007-05-30 | 东洋纺织株式会社 | Easy tear biaxially stretched polyester based film |
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US6045902A (en) * | 1992-11-06 | 2000-04-04 | Daicel Chemical Industries Ltd. | Easy tearable films and method of producing the same |
CN1972800A (en) * | 2004-04-30 | 2007-05-30 | 东洋纺织株式会社 | Easy tear biaxially stretched polyester based film |
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