Membrane material fiberizing method, prepared fiber product and building material containing fiber product

Abstract

The invention provides a method for fiberizing a membrane material. The method comprises the following steps: providing a membrane material; patterning the film material, and recessing the film material to form a plurality of recesses which are arranged at intervals in the first direction; and applying an external force to break the membrane material so as to form a plurality of fiber pieces with a predetermined size, and the recesses provide breakpoint areas when the membrane material is broken.

Description

Technical Field

[0001] The present disclosure relates to a method for fibrillating a film material, a fiber product obtained thereby, and a building material including the fiber product. Background Art

[0002] Existing fiber production methods, such as wet spinning, dry spinning, and melt spinning, etc., require the use of a lot of chemical drugs, the cost of the liquid medicine is high, it is easy to generate a large amount of wastewater, causing serious environmental hazards, and require a relatively high-temperature process, consuming a lot of energy. In addition to increasing production costs, it also wastes a lot of energy. Therefore, the existing fiber processes are neither economical nor environmentally friendly as a whole. Summary of the Invention

[0003] In some embodiments, the present disclosure provides a method for fibrillating a film material, including providing a film material; patterning the film material to indent the film material to form a plurality of recesses, the recesses being spaced apart in a first direction; and applying an external force to rupture the film material to form a plurality of fiber pieces having a predetermined size, wherein the recesses provide a break point region when the film material ruptures.

[0004] In some embodiments, the present disclosure provides a fiber product, including a plurality of fiber pieces made of a polymer film material, wherein each fiber piece of the fiber pieces has a main body portion and at least one extension portion located at one end of the main body portion, and the upper surface of the main body portion is higher than the upper surface of the extension portion.

[0005] In some embodiments, the present disclosure provides a building material including the fiber product as described above. Brief Description of the Drawings

[0006] To make the features and advantages of the present disclosure more obvious and understandable, different embodiments are specifically described below in conjunction with the accompanying drawings. It should be noted that the various features in the drawings are not drawn to actual scale and are only used for illustration. In fact, the sizes of the various components in the drawings can be arbitrarily enlarged or reduced according to actual applications to clearly show the features of the embodiments of the present disclosure.

[0007] Figure 1 A flowchart showing a method for fibrillating a film material according to some embodiments of the present invention.

[0008] Figure 2 A schematic processing diagram showing a method for fibrillating a film material according to some embodiments of the present invention.

[0009] Figure 3A 、 4A 、5A shows a top view schematic diagram of an intermediate stage of a method for fibrillating a film material according to some embodiments of the present invention.

[0010] Figure 3B , 4B , Figure 5B shows a cross-sectional schematic diagram of an intermediate stage of a film material fibrosis method according to some embodiments of the present invention. Among them Figure 3B , 4B , Figure 5B are respectively Figure 3A , 4A , the cross-sectional schematic diagrams of 5A.

[0011] Figure 6 shows a schematic diagram of embossing a film material using an embossing device according to some embodiments of the present invention.

[0012] Figure 7 shows a schematic diagram of an embossing wheel according to some embodiments of the present invention.

[0013] Figure 8 shows a schematic diagram of a laser cutting device according to some embodiments of the present invention.

[0014] Figure 9 shows a schematic diagram of film material fibrosis according to some embodiments of the present invention.

[0015] Figure 10 shows a partial schematic diagram of a single pressure roller in a rolling device according to some embodiments of the present invention.

[0016] Figure 11A and Figure 11B shows a schematic diagram of using a rolling device to fibrosis a film material according to some embodiments of the present invention.

[0017] Figure 12 shows a schematic diagram of a single fiber piece obtained by the method according to some embodiments of the present invention. Detailed Description of the Invention

[0018] The following disclosure provides many different embodiments or examples to show different components of the embodiments of the present disclosure. The following will disclose specific examples of the components and their arrangements in this specification to simplify the description of the present disclosure. Of course, these specific examples are not used to limit the present disclosure. For example, if the following disclosure of this specification describes forming a first component on or above a second component, it means that it includes an embodiment in which the formed first component and the second component are in direct contact, and also includes an embodiment in which additional components can be formed between the above-mentioned first component and the second component, and the first component and the second component are not in direct contact. In addition, various examples in the description of the present disclosure may use repeated reference symbols and / or words. The purpose of these repeated symbols or words is to simplify and clarify the present disclosure, and not to limit the relationship between various embodiments and / or the described configurations.

[0019] Furthermore, for the convenience of describing the relationship between one component or part in the drawings and another component or parts, spatial relative terms may be used, such as "below", "beneath", "above", "on top of" and the like. In addition to the orientations shown in the drawings, spatial relative terms also cover different orientations of the structures or devices during use or operation. When the structure or device is turned to a different orientation (for example, rotated 90 degrees or other orientations), the spatial relative adjectives used therein will also be interpreted according to the turned orientation.

[0020] Herein, the terms "about", "approximately", "substantially" generally mean within 20% of a given value or range, preferably within 10%, more preferably within 5%, or 3%, or 2%, or 1%, or 0.5%. It should be noted that the quantities provided in the specification are approximate quantities, that is, the meanings of "about", "approximately", "substantially" can still be implied even without specific mention of "about", "approximately", "substantially".

[0021] Some variations of the embodiments are described below. Although the steps in some of the described embodiments are carried out in a specific order, these steps can also be carried out in other logical orders. Additional process steps may be included before, during, and / or after some of the process steps described in the embodiments, and some of the process steps described in some embodiments may be replaced or deleted by other process steps in the methods of other embodiments. Furthermore, it can be understood that other components can be added to the devices or systems in the exemplary embodiments of the present invention, or some components can be replaced or omitted.

[0022] The present disclosure provides a method for fibrillating a film material, a fiber product obtained thereby, and a building material containing the fiber product. The method for fibrillating the film material proposed in the embodiments of the present disclosure first performs a patterning process on the film material to create breaking and weakening points, and then only a simple external force is required to break the patterned film material into fiber pieces of the required width size. The method proposed according to the embodiments can accurately control the length and width of the obtained fiber pieces. Furthermore, according to the method proposed in the embodiments, after the patterning process on the film material, it can be wound up first to effectively save storage space, warehouse storage volume, and transportation volume. Furthermore, according to the method proposed in the embodiments, the manufacturing method is simple, the liquid medicine cost is low, the waste liquid volume is small, and the process temperature is not required to be too high. Therefore, when applying the method of the embodiments to obtain fiber pieces according to requirements, the process can be simplified, the process time can be saved, the process efficiency can be greatly improved, and the process can be carried out at a temperature not too high (for example, between room temperature and the drying furnace temperature ≤ 100 °C), having multiple benefits such as more energy-saving, environmental protection, and reduced production costs. Mixing the fiber product obtained in the embodiments into building materials, such as cement, concrete raw materials, or asphalt concrete, can improve the properties of the building materials.

[0023] Figure 1 A flowchart showing a method 10 for the fibrosis of a membrane material according to some embodiments of the present invention. Figure 2 A schematic diagram showing the treatment of the fibrosis of a membrane material according to some embodiments of the present invention. It can be referred to simultaneously Figure 1 and Figure 2 .

[0024] According to some embodiments, referring to step 11 of Figure 1 , a membrane material is provided. This membrane material is, for example, a continuous membrane material made of a polymer. According to some embodiments, the provided membrane material is, for example, a modified membrane material. In this embodiment, a polyvinyl alcohol (PVA) membrane material is taken as an example for illustration. However, the method of the present disclosure is not limited to being only applied to the fibrosis of polyvinyl alcohol membrane materials, and may also be applied to the fibrosis of other polymer membranes or suitable materials.

[0025] The polyvinyl alcohol membrane material can be obtained by saponifying polyvinyl acetate resin. Examples of polyvinyl acetate resin include homopolymers of vinyl acetate, i.e., polyvinyl acetate, copolymers of vinyl acetate, and other monomers capable of copolymerizing with vinyl acetate. Examples of other monomers capable of copolymerizing with vinyl acetate include unsaturated carboxylic acids (such as acrylic acid, methacrylic acid, ethyl acrylate, n-propyl acrylate, methyl methacrylate), olefins (such as ethylene, propylene, 1-butene, 2-methylpropene), vinyl ethers (such as ethyl vinyl ether, methyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether), unsaturated sulfonic acids (such as vinyl sulfonic acid, sodium vinyl sulfonate), etc.

[0026] Referring to Figure 2 step 21, taking a polyvinyl alcohol membrane material as an example, the modification treatment 21 includes, for example, a swelling process 22, a cross-linking process 23, and / or a stretching process 24 for the membrane material. As Figure 2 shown, in some embodiments, the polyvinyl alcohol membrane material can be passed through a plurality of continuously arranged process baths, such as a swelling bath, a cross-linking bath, and / or a stretching bath, to swell, cross-link, and / or stretch the polyvinyl alcohol membrane material, thereby modifying the membrane material of the embodiment. In one embodiment, the above-mentioned swelling, cross-linking, and stretching processes can be selectively combined with one or more of them.

[0027] In the above-mentioned swelling process 22, the polyvinyl alcohol membrane material driven by rollers is first immersed in a swelling bath (the swelling liquid is water) to swell, and this step is beneficial for the polyvinyl alcohol membrane material to have better ductility in the subsequent stretching process 24.

[0028] In the above-mentioned bridging process 23, the bridging bath contains, for example, an aqueous boric acid solution. Immersing the PVA film material in boric acid can provide bridging between the PVA polymer chains, thereby enhancing the weather resistance and physical and mechanical properties of the PVA film material.

[0029] In the above-mentioned stretching process 24, in the stretching bath, the length of the PVA film material can be stretched to, for example, 0.5 to 7 times, preferably 2 to 7 times, and more preferably 4 to 7 times its original length. The above-mentioned stretching process 24 can be uniaxial or biaxial stretching. In the example of biaxial stretching, the stretching ratio of the PVA film material in the length direction is greater than that in the width direction. The stretching process 24 can increase the area of the PVA film material and improve the mechanical strength.

[0030] In one embodiment, the number of baths of the above-mentioned swelling bath, bridging bath, and stretching bath can be increased or decreased as needed.

[0031] Furthermore, in some embodiments, the stretched PVA film material can also be immersed in a potassium hydroxide (KOH) bath (not shown), for example, soaked in about 1% - 10% KOH for about several seconds (such as 10 seconds), which can improve the tensile strength of the material itself, make the PVA film material more easily broken into fibrous shapes in subsequent steps, and also improve the strength of the fiber product. After that, the PVA film material leaving the KOH bath is washed with water to remove the KOH on the surface. Then, a drying process is carried out to remove the excess moisture of the PVA film material, making the PVA film material more easily broken into fibrous shapes in subsequent steps and also improving the strength of the fiber product. In some embodiments, the moisture content of the PVA film material is controlled at about 2 - 10%.

[0032] After that, referring to Figure 1 step 12 of Figure 2 and the film material patterning 25 of

[0033] In some embodiments, the film material is patterned, for example, the film material is recessed to form a plurality of recesses. In some embodiments, these recesses are arranged substantially parallel to each other, and adjacent recesses are separated by a distance. The size of this distance (i.e., the length L1 of the protrusion 34, detailed later) depends on the length of the fiber piece to be formed. The method of patterning the film material and the details of forming the recesses in some embodiments will be detailed later. Figure 2 After that, referring to the film material winding 27 of In some embodiments, the patterned film material is wound. After a plurality of recesses are formed in the film material, there is still a film material portion below the recesses that is not broken, so it is still a continuous film material that can be wound. The wound film material has the advantages of small volume, easy storage, and easy transportation. And at this time, the width of the fiber piece obtained in the subsequent process is not limited by the patterned film material. The width of the fiber piece obtained can be freely adjusted by adjusting the fiberization equipment according to the width required for actual applications in the subsequent fiberization process.

[0034] After that, refer to Figure 1 Step 13 of Figure 2 The film material ruptures into fibers 29. According to some embodiments, an external force is applied to rupture the film material to form a plurality of fiber pieces with a predetermined size. In this text, this step can also be referred to as the film material fibrosis step (or fibrosis process). In some embodiments, a roller-type external force device, such as a rolling device that does not use a blade, can be provided to apply pressure to the film material, causing the film material to rupture into a plurality of fiber pieces. In this fibrosis step, the recesses previously formed on the film material provide the breakpoint areas when the film material ruptures. Details of the film material fibrosis step of some embodiments and the related devices that can be used to fragment the film material will be described in detail later.

[0035] After that, refer to Figure 1 Step 14 of

[0036] It should be noted that when actually applying the film material fibrosis method 10 of the embodiments of the present disclosure, it is not necessary to continuously perform all steps. After completing the patterning step of the film material (Step 12), it can be wound up and stored first. When fiber pieces are needed later, the rolled film material with recesses is supplied to the relevant device (such as a rolling device) to rupture the film material (Step 13).

[0037] Figure 3A and 4A , 5A shows a top view schematic diagram of an intermediate stage of a film material fibrosis method according to some embodiments of the present invention. Figure 3B and 4B , 5B shows a cross-sectional schematic diagram of an intermediate stage of a film material fibrosis method according to some embodiments of the present invention. Among them Figure 3B and 4B , 5B are respectively Figure 3A and 4A , the cross-sectional schematic diagram of 5A.

[0038] Refer to Figure 3A and Figure 3B , according to some embodiments, a film material 31 is provided. This film material is, for example, a continuous film material that has undergone the above-mentioned modification treatment 21 (such as Figure 2 the swelling process 22, the bridging process 23, and / or the stretching process 24) of

[0039] Refer to Figure 4A and Figure 4B, According to some embodiments, the film material 31 is patterned to form a concave portion of the film material 31 from the upper surface 311 of the film material 31, thereby forming a concavo-convex structure (such as concave portions 32 and protruding portions 34) on the surface of the film material. As Figure 4A shown, the formed concave portions 32 are spaced apart in the first direction D1 and extend in the second direction D2, where the second direction D2 is different from the first direction D1. The second direction D2 forms an angle with the first direction D1. In a non-limiting example, the second direction D2 is substantially perpendicular to the first direction D1. Furthermore, in some embodiments, the first direction D1 is substantially parallel to the machine direction (MD) of the film material 31, such as the stretching direction of the film material 31.

[0040] As Figure 4B shown, after the film material 31 is patterned, a protruding portion 34 is formed between two adjacent concave portions 32. The formed concave portions 32 do not cut through the film material 31, and a part of the film material remains to connect the adjacent protruding portions 34. Therefore, according to some embodiments, the patterned film material 31 includes a continuous bottom layer 33 and a plurality of protruding portions 34 located on the continuous bottom layer 33, and concave portions 32 are provided between the protruding portions 34. The upper surface 341 of the protruding portion 34 is higher than the upper surface 331 of the continuous bottom layer 33 exposed at the concave portion 32.

[0041] In some embodiments, the film material 31, the concave portion 32, and the continuous bottom layer 33 have thicknesses T, depths t1, and thicknesses t2 in the third direction D3, respectively, where the thickness T is the sum of the depth t1 and the thickness t2 (T = t1 + t2). In some embodiments, the depth t1 of the concave portion 32 is substantially equal to the height by which the protruding portion 34 protrudes above the continuous bottom layer 33. Since the concave portion 32 does not cut through the film material 31, the depth t1 of the concave portion 32 is less than the thickness T of the film material 31 (t1 < T).

[0042] The depth t1 of the concave portion 32 cannot be too shallow, otherwise it is not conducive to applying an external force to fibrillate the film material subsequently. The depth t1 of the concave portion 32 should not be too deep either, otherwise the continuous bottom layer 33 is likely to break, which is also not conducive to winding. In some embodiments, the film material 31 has a thickness T, and the concave portion 32 has a depth t1 (T and t1 are in the same unit). When the depth t1 and the thickness T satisfy the following formula (1), the film material 31 can be successfully wound into a continuous coil without breakage:

[0043]

[0044] Furthermore, although in the cross-section of this example, the protrusion 34 has a generally flat upper surface 341 and the continuous bottom layer 33 has a generally flat upper surface 331, the present disclosure is not limited thereto. The upper surface 341 of the protrusion 34 may have a convex, concave, or other non-flat shape, depending on the surface shape of the fiber member to be formed subsequently. The continuous bottom layer 33 may also have a convex, concave, or other non-flat shape of the upper surface 331, and the present disclosure does not particularly limit it. Any cross-sectional shape that can disconnect the continuous bottom layer 33 through the fragmentation step of the embodiment subsequently belongs to the application scope of the present disclosure.

[0045] Furthermore, in some embodiments, there are protrusions 34 between adjacent recesses 32. That is, the distance between adjacent recesses 32 in the first direction D1 is the length L1 of the protrusion 34. The lengths L1 of the respective protrusions 34 in the first direction D1 may be the same or different. In practical applications, the length L1 of the protrusion 34 (the distance between the recesses 32) depends on the length of the fiber member to be formed subsequently.

[0046] Furthermore, in some embodiments, adjacent protrusions 34 have a spacing P1 in the first direction D1. That is, the distance between adjacent protrusions 34 in the first direction D1 is the length of the recess 32 in the first direction D1 (= spacing P1). The respective spacings P1 between adjacent protrusions 34 may be the same or different, and may be configured appropriately according to the actual application situation. If the spacing P1 is too large, it will cause unnecessary waste of materials. In some embodiments, the spacing P1 is less than the length L1.

[0047] After that, referring to Figure 5A and Figure 5B , according to some embodiments, an external force is applied to rupture the film material 31 to form a plurality of fiber members. For example, a pressure can be applied to the film material 31 by a rolling device to rupture the film material into a plurality of fiber members. In some embodiments, the extending direction of the recess 32 is substantially perpendicular to the conveying direction of the film material 31 supplied to the rolling device (the two directions are approximately at a 90-degree angle). For example, the film material 31 is conveyed along the first direction D1 between the pressure rollers of the rolling device, and the axial direction of the pressure rollers is arranged along the second direction D2, for example. The protrusions arranged on the pressure rollers and the pressure applied to the film material 31 cause the film material 31 to break at the recess 32 and rupture into a plurality of fiber members FP, and each fiber member FP includes a strip-shaped protrusion 34 ( Figure 4A , Figure 4B ). Each fiber member FP has a width W in the second direction D2.

[0048] Thus, according to some embodiments of the present disclosure, the length of each fiber member in the first direction D1 can be controlled by forming the recesses 32. The farther the adjacent recesses 32 are from each other, the longer the length of each fiber member in the first direction D1. The pressure of the pressing roller of the rolling device on the protrusions 34 of the film material 31 can simultaneously break the recesses 32 at both ends of each protrusion 34, causing them to break into fiber members FP that are separated from each other in the second direction D2. Therefore, according to the method proposed in the embodiments, a plurality of fiber members FP with predetermined dimensions can be obtained.

[0049] It should be noted that, according to some embodiments, the continuous bottom layer 33 portion at each recess 32 serves as a break point area when the film material breaks. In order to clearly show the separated fiber members FP in the top view, only the protrusions 34 are shown in Figure 5A while the broken portions of the continuous bottom layer 33 connecting the bottom ends of the protrusions 34 are omitted. Figure 5B It clearly shows that the broken portions of the continuous bottom layer 33 remain at both ends of the bottom of a single protrusion 34. Figure 5B The vertical connecting lines in

[0050] Some examples are presented below to illustrate some related devices that can be applied to the patterning of film materials (such as the operations of Figure 4A , Figure 4B ) and the rupture of film materials (such as the operations of Figure 5A , Figure 5B ). However, the following description is only the content of some embodiments, and the present disclosure is not limited to these shown devices and related operation descriptions.

[0051] According to some embodiments, an embossing process, a cutting process, or other suitable methods can be performed on the film material 31 to form the recesses 32 as shown in Figure 4A - Figure 4B . Figure 6 shows a schematic diagram of an embossing process on a film material using an embossing device according to some embodiments of the present invention. In some embodiments, the embossing device 4 is used to perform an embossing process on the extended film material 31.

[0052] In some embodiments, the embossing device may include a rectangular tool (not shown), or other shaped tools to perform an embossing process on the film material 31.

[0053] In some embodiments, the embossing device 4 includes an embossing wheel 40 and a plurality of rollers 43a - 43d. The embossing wheel 40 is disposed above the film material 31. The embossing wheel 40 includes a wheel body 41 and a plurality of convex portions 42 on the surface of the wheel body 41. The film material 31 is conveyed by the rollers 43a and 43b of the conveying portion and is introduced into the embossing wheel 40 having a concavo-convex shape opposite to the concavo-convex structure to be formed on the film material 31. According to the position of the convex portions 42 on the surface of the wheel body 41, the conveying speed of the film material 31, and the rotational speed of the embossing wheel 40, the three are adjusted in cooperation with each other to form a desired concavo-convex shape on the surface of the film material 31. As Figure 6 shown, when the embossing process is performed on the film material 31, the film material 31 is clamped between the embossing wheel 40 and the roller 43c. These convex portions 42 contact and press down the surface of the film material 31 (such as the upper surface 311), and recesses 32 are formed on the surface of the film material 31. The patterned film material 31 is conveyed by the roller 43d to perform the next operation.

[0054] The embossing pattern can be any shape, depending on the shape of the recesses 32 to be formed. Furthermore, the depth of the recesses 32 required for the film material 31 (such as the depth t1) can be controlled by temperature during embossing. In some embodiments, the embossing process is performed, for example, within a melting processing temperature range of the film material 31. Taking a thermoplastic polymer film as an example, mechanical embossing is performed at a temperature that causes the polymer film to be in a molten state, which can soften the polymer film and make it easy to be shaped, so as to form a concavo-convex structure on the surface of the polymer film. If the embossing set temperature is too low, it may be difficult to form a concavo-convex structure on the surface of the film material 31. If the embossing set temperature is too high (such as exceeding 90°C) or the pressing time of the film material 31 is too long, the surface of the film material 31 may undergo qualitative changes.

[0055] In some embodiments where the film material 31 is a polyvinyl alcohol film, the embossing set temperature is between about 40°C and about 90°C, or between about 50°C and about 80°C, or between about 55°C and about 70°C, or other suitable temperature ranges, so that the polyvinyl alcohol appears in a molten state and is easy to be shaped. If the embossing set temperature exceeds about 90°C, the surface of the polyvinyl alcohol may undergo qualitative changes, such as forming polyene polymers and showing yellowing phenomena. The embossed film material 31 is conveyed at room temperature and cooled and shaped to obtain the desired concavo-convex structure.

[0056] Therefore, according to the above, the temperature of the embossing process can be determined according to the actually selected film material 31, and it is preferably within a temperature range that can perform melting processing on the film material 31 and does not cause qualitative changes in the film material 31.

[0057] Furthermore, the pattern of the embossing tool used in the embossing process, such as the convex portion 42 on the embossing wheel, is complementary to the shape of the concave portion 32 of the film material 31, thereby affecting the cross-sectional shape of the finally produced fibrous product. Therefore, according to some embodiments, the embossing tool can be provided with convex portions 42 having a specific shape and the spacing of the convex portions 42 can be configured according to the requirements of the shape of the fibrous product.

[0058] In some embodiments, the shape of the convex portion 42 can be arc-shaped, triangular, quadrilateral, polygonal, for example, pentagonal or hexagonal. In addition, the shape of the convex portion 42 of the present invention can also be a combination of the above figures.

[0059] In addition, when performing the embossing process, the softness of the surface of the film material can also be improved by other means to facilitate the shaping of the film material. Figure 7 A schematic diagram of an embossing wheel according to some embodiments of the present invention is shown. In some embodiments, the embossing wheel 40 includes a wheel body 41 and a plurality of convex portions 42 on the surface of the wheel body 41. In some embodiments, one or more of the convex portions 42 further include holes 423 as water outlet holes. When the convex portion 42 contacts the surface of the film material 31, water can flow out from the holes 423 to moisten the surface of the film material 31, thereby improving the softness of the surface of the film material 31 and making it easier for the surface of the film material 31 to form a concave portion 32 due to the downward pressure of the convex portion 42, improving the embossing effect.

[0060] Although Figure 7 one convex portion 42 includes one water outlet hole 423, the present disclosure does not limit the number and size of the water outlet holes 423. For example, one convex portion 42 can include a plurality of water outlet holes with appropriate sizes distributed on the surface of the convex portion 42, and water can flow out simultaneously when the convex portion 42 contacts the surface of the film material 31 to moisten the surface of the film material 31. Therefore, the surface of the film material 31 under the embossing wheel 40 can have good softness due to water swelling, which is beneficial for the convex portion 42 to shape the surface of the film material 31. Furthermore, in addition to the above-mentioned water outlet hole method, other suitable methods can also be used, such as setting other components, such as a shower head, a spray or a humidifying device (not shown), above the film material 31 to supply additional moisture and humidity to make the surface of the film material 31 swell and improve the embossing effect.

[0061] In addition, in addition to the above embossing process, a non-blade cutting device, such as a laser cutting device, a water jet cutting device or other suitable cutting devices, can also be used to perform a cutting process on the film material 31 to form a concave portion 32 as shown in Figure 4A - Figure 4B the figure.

[0062] Figure 8A schematic diagram of a laser cutting device according to some embodiments of the present invention is shown. A laser beam 52 emitted by the laser cutting device 51 impacts the surface of the film material 31. For example, the laser beam 52 impacts from the upper surface 311 of the film material 31 in the thickness direction of the film material 31 to remove a part of the film material 31, and the laser beam 52 extends along a predetermined path on the surface of the film material 31 (for example, extends along the second direction D2), thereby forming a recess 32 with a predetermined depth (as Figure 4A , Figure 4B shown). By adjusting the intensity of the laser beam 52 and the time for damaging the surface of the film material 31, and gradually moving the film material 31, a plurality of recesses 32 with appropriate spacing are formed on the surface of the film material 31.

[0063] Furthermore, in some embodiments, after patterning the film material 31 (such as Figure 1 step 12) and before fibrillating the patterned film material 31 (such as Figure 1 step 13), a step of detecting the moisture content of the patterned film material 31 may also be included. In some embodiments, if the moisture content of the patterned film material exceeds 10%, a drying process may be performed to make the patterned film material have a moisture content in the range of about 2% - about 10%, and then the fibrillating step is carried out by applying an external force to break the patterned film material into a plurality of fiber pieces. The drying process can remove the moisture of the material, control the moisture content of the film material within 2 - 10%, make the material more easily broken into fibrous form, and also improve the strength of the fiber product. If the moisture content of the patterned film material is in the range of about 2% - about 10%, the fibrillating step can be continued to obtain a plurality of fiber pieces.

[0064] According to some embodiments, after the operation of patterning the film material 31, such as embossing, non - blade cutting (laser or water - jet cutting), or any other suitable process that can form recesses 32 on the surface of the film material 31, the patterned film material 31 can be fibrillated to break the film material and form a plurality of fiber pieces FP (as Figure 5A , Figure 5B shown). The following descriptions of the related equipment and operations are only for illustrating some embodiments, and the present disclosure is not limited to the illustrated equipment and related operation descriptions.

[0065] Figure 9 A schematic diagram of fibrillating a film material according to some embodiments of the present invention is shown. In some embodiments, a roller - type external force device or other external force destruction device can be used to fibrillate the film material 31. For example, an external force can be applied to the patterned film material (the surface of the film material 31 has recesses 32) through a rolling device 6 that does not require the use of a blade, an irregular press, or any suitable device to break the film material.

[0066] As Figure 9As shown, a roll-shaped patterned film material 31 is provided, and one end of the film material 31 is supplied between the lower pressing roller 61 and the upper pressing roller 62 of the rolling device 6. The lower pressing roller 61 and the upper pressing roller 62 apply pressure to the film material 31, causing the film material 31 to break into a plurality of fiber pieces FP having a predetermined size. Moreover, a container (such as a bag or a box) 65 is provided below the pressing roller to collect these fiber pieces FP.

[0067] Figure 10 FIG. shows a partial schematic view of a single pressing roller in a rolling device according to some embodiments of the present invention. Figure 10 In Figure 9 the lower pressing roller 61 in is taken as an example. A plurality of adjustable components are arranged on the lower pressing roller 61 and can be set to be convex or flat according to the required size. The upper pressing roller 62 also has similar adjustable components. These adjustable components can be set according to the width of the fiber pieces to be formed, so the position of the pressure application point for fibrillating the film material 31 can be quickly adjusted according to application requirements.

[0068] In some examples, as Figure 10 shown, the partial part of the lower pressing roller 61 includes adjusting members 61-1, 61-2, and 61-3. The adjusting members 61-1 and 61-3 are set to be convex, while the adjusting member 61-2 is set to be flat. When the lower pressing roller 61 breaks the patterned film material 31, the adjusting members 61-1 and 61-3 contact the lower surface of the film material 31 as protrusions of the lower pressing roller 61. Figure 10 Only 3 adjusting members are shown, but the actual pressing roller includes more adjusting members continuously arranged on the surface of the pressing roller, and the convex or flat states of each adjusting member can be set according to the width of the fiber pieces to be formed.

[0069] Figure 11A and Figure 11B FIG. shows a schematic view of fibrillating a film material with a rolling device according to some embodiments of the present invention. In some embodiments, the rolling device includes a lower pressing roller 61 and an upper pressing roller 62. The lower pressing roller 61 includes a plurality of adjusting members, and the adjusting members 61-1, 61-3, 61-5, 61-7, 61-9, 61-11 are set to be convex to serve as protrusions of the lower pressing roller 61 and can contact the lower surface of the patterned film material 31. The upper pressing roller 62 also includes a plurality of adjusting members, and the adjusting members 62-1, 62-3, 62-5, 62-7, 62-9, 62-11 are set to be convex to serve as protrusions of the upper pressing roller 62 and can contact the upper surface of the patterned film material 31. The protrusions of the lower pressing roller 61 and the upper pressing roller 62 are arranged staggeredly.

[0070] Refer to Figure 11A, when the patterned film material 31 (having recesses 32 extending in the second direction D2) is supplied between the lower pressing roller 61 and the upper pressing roller 62 in the first direction D1, the configuration of the protrusions of the upper pressing roller 62 and the upper pressing roller 62 determines the width of the fibrous member formed after crushing the film material 31. For example, the distance between the adjusting member 61-1 of the lower pressing roller 61 and the adjusting member 62-1 of the upper pressing roller 62 in the second direction D2 corresponds to the width WA of the fibrous member after fragmentation. And the length L2 of the protrusion 34 between the recesses 32 in the first direction D1 generally corresponds to the length of the fibrous member.

[0071] Figure 11B and Figure 11A Similarly, the main difference lies in the distance between the adjusting members. Refer to Figure 11B , the lower pressing roller 61 includes a plurality of adjusting members, and the adjusting members 61-3, 61-7, and 61-11 are set as protrusions to serve as the protrusions of the lower pressing roller 61, which can contact the lower surface of the patterned film material 31. The upper pressing roller 62 also includes a plurality of adjusting members, and the adjusting members 62-1, 62-5, and 62-9 are set as protrusions to serve as the protrusions of the upper pressing roller 62, which can contact the upper surface of the patterned film material 31. The protrusions of the lower pressing roller 61 and the upper pressing roller 62 are arranged staggeredly. When the patterned film material 31 (having recesses 32 extending in the second direction D2) is supplied between the lower pressing roller 61 and the upper pressing roller 62 in the first direction D1, the configuration of the protrusions of the upper pressing roller 62 and the upper pressing roller 62 determines the width WB of the fibrous member formed after crushing the film material 31, where the width WB is greater than the width WA.

[0072] The above-mentioned rolling equipment 6 or similar external force destruction equipment can cause the film material 31 to break with only simple external force. Since no blade is required, it has high safety during the fibrosis operation. However, the present disclosure is not limited to this. In some other embodiments, a blade-type cutting machine can be used to cut between the recesses 32 of the film material 31, and the cutting direction forms an angle greater than 0 degrees with the extension direction of the recesses 32 (for example, the second direction), thereby forming a plurality of fibrous members FP. In some embodiments, the cutting direction is, for example, perpendicular to the extension direction of the recesses 32.

[0073] According to the method proposed in the above embodiments, a fibrous product including a plurality of fibrous members FP with required dimensions can be quickly obtained from a film material (such as a polymer film). As the method proposed in the above embodiments, when the patterned film material is fragmented by an external force (such as rolling equipment), the recesses 32 provide a break point area. Therefore, in addition to the protrusions 34 between the recesses 32 ( Figure 4A , Figure 4B ), each fibrous member FP also includes a part of the continuous bottom layer 33 at the recesses 32, and this part of the continuous bottom layer 33 is an extension of at least one end or both ends of the main body part of each fibrous member FP.

[0074] Figure 12 A schematic diagram showing a single fiber piece produced by the method according to some embodiments of the present invention. Each fiber piece FP includes a main body portion 71 and two extending portions 72, 73 disposed at both ends of the main body portion 71. The lower surface 712 of the main body portion 71. The upper surface 711 of the main body portion 71 is higher than the upper surfaces 721, 731 of the extending portions 72, 73. In some embodiments, the first direction D1 is the mechanical processing direction of the film material, such as the film stretching direction, and the extending portions 72, 73 are respectively disposed at both ends of the main body portion 71 along the mechanical processing direction.

[0075] Furthermore, the main body portion 71 and the extending portions 72, 73 have lengths L1, L12, L13 in the first direction D1 respectively. Therefore, the total length L of the fiber piece FP in the first direction D1 is the sum of the lengths L1, L12, L13. As designed according to requirements, if the length of the protrusion 34 ( Figure 4A , Figure 4B ) of the patterned film material in the first direction D1 has a high ratio relative to the length of the recess 32 in the first direction D1, the total length L of the fiber piece FP is approximately the same as the length L1 of the approximate main body portion 71.

[0076] Furthermore, if the patterned film material is fragmented by a non-blade cutting method (such as a rolling device), any position of the continuous bottom layer 33 at the recess 32 may be broken, so the distances from the fracture points on both sides of the main body portion 71 to the main body portion 71 may be approximately the same or significantly different. That is, in some embodiments, the lengths of the two extending portions 72, 73 of a single fiber piece FP may be substantially the same or different. Or, in some embodiments, the length of one of the extending portions of a single fiber piece FP is very short, and this fiber piece FP can be regarded as having only one extending portion.

[0077] In some embodiments, the length of each formed fiber piece FP is greater than or equal to the spacing between two adjacent recesses 32 in the first direction D1 (= Figure 4B the length L1 of the protrusion 34 in

[0078] ), and less than or equal to the sum of this spacing and twice the length of the recess in the first direction D1 (= the spacing P1 of the protrusion 34).

[0079] Taking the production of polyvinyl alcohol fiber parts by wet spinning as an example, polyvinyl alcohol is mainly used as the raw material, and some composite cross-linking agents are added. For example, a composite cross-linking agent composed of zirconium, boron, titanium, and silicon is used. After being dissolved in water, it passes through multiple process baths. For example, it is spun in the first coagulation bath, dehydrated and solidified in the second coagulation bath, then undergoes wet heat drawing in a bath, undergoes cross-linking removal treatment in an acid bath, and removes acid and sodium sulfate in the fiber in a neutralization bath. After that, it undergoes drying treatment, and finally dry heat drawing is carried out to make the total draw ratio reach 15 to 18 times. Therefore, the wet spinning process is complex (requiring equipment such as the first and second coagulation baths, stretching tanks, acid tanks, neutralization tanks, drying, and heat stretching), and the cost of the liquid medicine is high and a large amount of waste liquid is generated (including zirconium compounds, titanium salts, borates, silicates, sodium hydroxide, sodium sulfate, sulfuric acid, etc.), and the process temperature is high (for example, the heat stretching temperature is about 225°C to 245°C).

[0080] Taking the production of fiber parts by dry spinning as an example, after the polymer is dissolved in a solvent, the process from the spinneret to the textile is the same as that of wet spinning, but no coagulating liquid is used. Instead, the spinning solution is directly pressed into hot air to evaporate the solvent and solidify the fiber, which is a spinning method similar to injection molding. In short, dry spinning is to heat the raw material, and through its contact with hot air and cold air, it is drawn into the form of fibers.

[0081] Taking the production of fiber parts by melt spinning as an example, after the polymer is polymerized into ester pellets, it is melted at a high temperature and extruded through a spinneret by a precision extrusion roller (roller) and a precision pump. Subsequently, dozens / hundreds of polymers follow the trend of gravity and then pass through several stretching rollers to control the fiber fineness and are wound up.

[0082] Therefore, the current manufacturing method of fiber parts has very complicated steps, also requires a relatively high-temperature process, consumes energy, and has a high cost of liquid medicine and a large amount of waste liquid generated. The fiber part manufacturing method proposed in the embodiment has a simpler process, a low cost of liquid medicine (such as using boric acid, sulfuric acid, potassium sulfate), is easy to recycle, has a small amount of waste liquid, and does not require a high-temperature process (the drying furnace temperature ≤ 100°C). Therefore, the embodiment has the benefits of energy conservation, environmental protection, and low production cost.

[0083] In one embodiment, the fiber part FP can be further cut, ground, or crushed to meet the requirements of subsequent product applications.

[0084] <Fiber product application>

[0085] In some applications, the prepared fiber products of the embodiment (such as the above-mentioned multiple fiber parts FP) can be mixed into building materials, such as cement, concrete raw materials, or asphalt concrete, to improve their properties.

[0086] Specifically, the cement raw materials include calcium oxide (CaO). Taking general Portland cement clinker as an example, it is mainly composed of four oxides: calcium oxide (CaO), silicon dioxide (SiO2), aluminum oxide (Al2O3), and iron oxide (Fe2O3). Usually, the total amount of these four oxides accounts for more than 95% in the clinker, and the remaining less than 5% are minor oxides, such as magnesium oxide (MgO), sulfur trioxide (SO3), titanium oxide (TiO2), phosphorus pentoxide (P2O5), and salts (K2O, Na2O), etc. With the tightening of building codes and the complication of modern construction methods, the requirements for cement strength are getting higher and higher. Mixing the fiber member FP of the embodiment into the cement can improve the mechanical properties of the cement and increase the strength of the building. In the application of concrete (including the mixture of modified cement, stone (coarse aggregate), sand (fine aggregate), and water), the surface of the concrete made of the cement mixed with the fiber member FP of the embodiment is denser, and the weather resistance of the concrete is further improved. In addition, in some applications, the prepared fiber products of the embodiment (such as the above-mentioned multiple fiber members FP) can also be mixed into the asphalt concrete for paving roads to increase the road strength and improve the friction coefficient.

[0087] [Related Experiments and Evaluations]

[0088] Please also refer to Figure 4A 、 4B 、5A, 5B and the above description. The present disclosure also proposes, in some embodiments, the influence of the embossing temperature on the film material when patterning the film material, such as embossing process, for example, whether embossing can be completed and whether the film material undergoes qualitative change. And the present disclosure also proposes the relevant dimensions of the patterned film material (such as the film thickness T, the depth t1 of the concave part, the pitch P1 of the protrusions 34, the length L1 of the protrusions 34) and the winding evaluation, including whether the patterned film material can be wound smoothly, whether the patterned film material breaks during winding, etc.

[0089] The following are the experiments and evaluations on the patterning process and fibrillation process of the modified polyvinyl alcohol film material. However, the following experimental results are only for illustrative purposes and should not be construed as a limitation on the implementation of the present disclosure.

[0090] In addition, the relevant equipment and evaluation methods for the film material patterning process (such as embossing process or laser cutting process) and fibrillation process proposed in the experimental examples are briefly described as follows. The detailed process content can also be referred to the description of the above embodiments. The process and evaluation methods will not be repeated in the subsequent analysis.

[0091] [Film Material Patterning Process]

[0092] (A) Embossing Process

[0093] The modified polyvinyl alcohol film material is embossed through a jig.

[0094] Fixture size: rectangle, 150 mm * 0.1 mm. The embossing temperature is adjusted accordingly according to each experimental example.

[0095] (B) Cutting process

[0096] The modified polyvinyl alcohol film material can also be cut to the required depth using a laser. And a laser microscope can be used to measure the depth of the concave part formed by cutting.

[0097] <Fibrosis process>

[0098] Use a rolling equipment as shown in Figure 11A or Figure 11B to press and cut the patterned polyvinyl alcohol film material, and confirm whether it can be broken.

[0099] In the experiment, the pressing diameter of the upper and lower pressing rollers of the rolling equipment used is about 5 cm, the adjusting parts of the upper and lower pressing rollers are long strip-shaped, and the interval width between them is about 0.2 cm. Therefore, the width of the fiber part is about 0.2 cm.

[0100] <Evaluation items>

[0101] (1) Whether it can be embossed:

[0102] Observe the appearance of the film material to see if there are embossed patterns on the surface of the film material. And the depth of the concave part after pressing can be measured with a microscope. The film thickness T, the depth t1 of the concave part, the spacing P1 of the protrusions 34, and the length L1 of the protrusions 34 are listed in Table 1 (refer to Figure 4B ).

[0103] (2) Whether it can be wound:

[0104] Use a small pipe to conduct a winding test on the patterned film material, and observe the appearance of the film material to confirm its winding feasibility. The winding diameter of the small pipe is about 5 cm, and the winding speed is about 1 m / min.

[0105] (3) Whether it can be broken:

[0106] As described in the fibrosis process, after using the rolling equipment to press and cut the patterned polyvinyl alcohol film material, observe the appearance and confirm whether it can be successfully broken into multiple separate fiber parts.

[0107] (4) Whether qualitative change occurs:

[0108] Confirm whether qualitative change occurs in the patterned polyvinyl alcohol film material, such as yellowing. If the temperature used in the patterning process is too high, the polyvinyl alcohol film material forms polyene polymers and shows yellowing.

[0109] Table 1 lists the evaluation of the film materials with different embossing temperatures in the embossing process.

[0110] In the items of Table 1, 「○」 indicates that the surface of the film material has been successfully embossed, can be smoothly wound up, and can be broken into multiple fiber pieces; 「╳」 indicates that the surface of the film material cannot be smoothly embossed and cannot be broken.

[0111] It should be noted that in Table 1, 「╳」 indicates that the mold material has not undergone qualitative change.

[0112] Table 1

[0113]

[0114] According to the results of Table 1, in some experimental examples, the polyvinyl alcohol film material can successfully complete patterning (such as embossing) between about 40 °C and about 90 °C, and can be smoothly wound up and broken into multiple fiber pieces. Moreover, the polyvinyl alcohol film material has not undergone qualitative change (no yellowing phenomenon). If the patterning temperature is too low, such as the embossing temperature is about 35 °C, patterning cannot be successfully performed on the surface of the polyvinyl alcohol film material. If the patterning temperature is too high, such as the embossing temperature is about 95 °C, the surface of the polyvinyl alcohol film material will undergo qualitative change (the appearance has a yellowing phenomenon).

[0115] It should be noted that Table 1 only lists some experimental results. There are also multiple patterning experiments at other temperatures between 40 °C and 90 °C, which can also enable the polyvinyl alcohol film material to successfully complete patterning (such as embossing), and can be smoothly wound up and broken into multiple fiber pieces. Moreover, the polyvinyl alcohol film material has not undergone qualitative change (no yellowing phenomenon). This is omitted here for illustration.

[0116] Table 2 lists the relevant dimensions of the patterned film material and the relevant evaluations of whether it can be wound up and whether it can be fibrillated. Among them, 「○」 indicates that the surface of the film material has been successfully embossed.

[0117] Table 2

[0118]

[0119] Please refer to Figure 4B . According to the results of Table 2, when the depth t1 of the concave portion 32 and the thickness T of the film material 31 satisfy formula (1),

[0120]

[0121] The patterned film material can be smoothly wound up (that is, a continuous coil without breakage). And in the subsequent fibrillation process, it can be successfully broken into multiple fiber pieces.

[0122] In summary, compared with the current fiber manufacturing processes (such as the wet spinning or dry spinning mentioned above) which are complex, energy-consuming at high temperatures, have high chemical solution costs, and generate a large amount of waste liquid, the fiber part manufacturing method proposed in the embodiments is to provide a film material, pattern the film material, and perform fiberization, and then it can be broken into fiber parts of the required size. The provided film material can be a film material that has been modified to enhance its properties. Taking polyvinyl alcohol fiber parts as an example, a modified polyvinyl alcohol film that has undergone processes such as swelling, crosslinking, and stretching can be provided to increase the mechanical strength and water resistance of the obtained fiber parts. The manufacturing method proposed in the embodiments is simple, has low chemical solution costs, less waste liquid, and does not require high-temperature processes, so it has the advantages of being more energy-efficient, environmentally friendly, and reducing production costs.

[0123] Furthermore, the stacking voids of the fiber parts are large and the transportation volume is large. According to some embodiments, after patterning the film material, it can be wound first. The wound film material can save storage space and the storage volume in the warehouse. Shipping in a wound form can effectively save the transportation volume, and the fiberization process (such as using a simple external force to break the patterned film material) can be carried out when fiber parts are needed.

[0124] Furthermore, after patterning the (modified) film material, such as the concave portion 32 proposed in some of the above embodiments, breakage weak points can be created. When the fiberization process is carried out later, only a simple external force is needed to break the patterned film material into fiber parts of the required width size. The distance between adjacent breakage weak points determines the length of the obtained fiber parts. Therefore, according to the fiber manufacturing method proposed in the embodiments, the length of the fiber parts (for example, correspondingly changing the position of the breakage weak points) and / or the width of the fiber parts (for example, correspondingly changing the position of the adjustment member on the pressure roller in a rolling equipment) can be adjusted according to the requirements of the fiber part size, and the length and width of the obtained fiber parts can be accurately controlled.

[0125] Although the present disclosure has been disclosed as above with the foregoing embodiments, it is not intended to limit the present disclosure. Those of ordinary skill in the technical field to which the present disclosure pertains can make some changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to that defined by the appended patent application scope. In addition, each patent application scope constitutes an independent embodiment, and all combinations of various patent application scopes and embodiments are within the scope of the present disclosure.

[0126] [Symbol Description]

[0127] 10: Method

[0128] 11, 12, 13, 14: Steps 21: Modification treatment

[0129] 22: Swelling process

[0130] 23: Crosslinking process

[0131] 24: Extension process

[0132] 25: Membrane patterning

[0133] 27: Membrane winding

[0134] 29: Membrane breaking into fibers

[0135] 31: Membrane

[0136] 311,331,341,711,721,731: Upper surface

[0137] 312,712: Lower surface

[0138] 32: Recess

[0139] 33: Continuous bottom layer

[0140] 34: Protrusion

[0141] FP: Fiber part

[0142] 4: Embossing equipment

[0143] 40: Embossing wheel

[0144] 41: Wheel body

[0145] 42: Convex part

[0146] 423: Hole

[0147] 43a - 43d: Roller

[0148] 51: Laser cutting equipment

[0149] 52: Laser beam

[0150] 6: Rolling equipment

[0151] 61: Lower pressing roller

[0152] 62: Upper pressing roller

[0153] 65: Container

[0154] 61 - 1,61 - 2,61 - 3,61 - 5,61 - 7,61 - 9,61 - 11,62 - 1,62 - 3,62 - 5,62 - 7,62 - 9,62 - 11: Adjusting part

[0155] 72,73: Extension part

[0156] L,L1,L12,L13: Length

[0157] T,t2: Thickness

[0158] t1: Depth

[0159] W, WA, WB: Width

[0160] P1: Pitch

[0161] D1: First direction

[0162] D2: Second direction

[0163] D3: Third direction

Claims

1. A method for fiberizing a membrane material, characterized in that: include: Providing a membrane material; Patterning the film material to form a plurality of recesses by recessing the film material, wherein the recesses are spaced apart in a first direction; as well as An external force is applied to rupture the film material to form a plurality of fiber pieces with a predetermined size, wherein the recesses provide breakpoint areas when the film material is ruptured.

2. The method for fiberizing a membrane material as claimed in claim 1, wherein the recesses extend in a second direction, and the second direction is different from the first direction.

3. The method for fiberizing a film material according to claim 1, wherein after forming the recessed portions, the film material is a continuous film material without breaks, and the method further comprises: The film material is rolled up.

4. The method for fiberizing a membrane material as claimed in claim 3, wherein the membrane material has a thickness, and the concave portions each have a depth, the thickness is represented by T, the depth is represented by t1, and the depth and the thickness satisfy the following formula:

5. The method for fiberizing a film material as claimed in claim 1, wherein the film material is subjected to an embossing process or a cutting process to form the recesses.

6. The method for fiberizing a film material as claimed in claim 5, wherein the film material is subjected to the embossing process using an embossing device, and the embossing process is carried out within a melting processing temperature range of the film material.

7. A method for fiberizing a film material as claimed in claim 6, wherein the embossing equipment comprises an embossing wheel, and the embossing wheel comprises a plurality of protrusions, and when the film material is subjected to the embossing process, the protrusions contact and press down the surface of the film material so that the film material forms the concave portions.

8. The method for fiberizing a membrane material as claimed in claim 7, wherein each of the protrusions comprises a hole, and when the protrusions contact the surface of the membrane material, water flows out of the holes to wet the surface.

9. The method for fiberizing a film material as claimed in claim 5, wherein a non-blade cutting device is used to perform the cutting process on the film material.

10. The method for fiberizing a membrane material according to claim 1, wherein a roller-type external force device is provided to apply pressure to the membrane material so as to break the membrane material into the fiber pieces, wherein the roller-type external force device comprises: An upper pressing roller having a first protrusion contacting an upper surface of the film material; as well as A lower pressing roller having a second protrusion contacting the lower surface of the film material, When the film material passes between the upper pressing roller and the lower pressing roller, the first protrusions and the second protrusions exert pressure on the film material, thereby causing the film material to rupture.

11. A method for fiberizing a film material as claimed in claim 1, wherein a blade-type cutting machine is provided to apply the external force to the film material, and the fiber pieces are formed by cutting between the recesses, with the cutting direction forming an angle greater than 0 degrees with the extension direction of the recesses.

12. The method for fiberizing a film material as claimed in claim 1, wherein before patterning the film material, the film material is first subjected to a modification process, the modification process comprising a swelling process, a bridging process or an extension process.

13. The method for fiberizing a membrane material according to claim 12, wherein after the stretching process, the modification treatment further comprises: Soaking the membrane material in 1%-10% potassium hydroxide; Washing the membrane material with water to remove potassium hydroxide on the membrane material; as well as The membrane material is dried to make the moisture content of the membrane material within the range of 2%-10%.

14. The method for fiberizing a film material according to claim 1, wherein after forming the concave portions in the film material and before applying the external force to rupture the film material, the method further comprises: Detecting the moisture content of the membrane material, If the moisture content exceeds 10%, a drying step is performed on the film material to make the moisture content of the film material within the range of 2%-10%, and then the external force is applied to rupture the film material; If the moisture content is within the range of 2%-10%, the step of rupturing the membrane material is continued.

15. The method for fiberizing a membrane material as claimed in claim 1, wherein after the membrane material is broken, the length of each of the fiber pieces formed is greater than or equal to a distance between two adjacent recesses in the first direction, and less than or equal to the distance plus 2 times the length of each of the recesses in the first direction.

16. The method for fiberizing a film material as claimed in claim 1, wherein the film material is a polyvinyl alcohol film, and the film material is formed into the recessed portions at a temperature between 40°C and 90°C.

17. A fiber product, characterized in that: It comprises a plurality of fiber pieces made of polymer film material, wherein each of the fiber pieces has a main body and at least one extension part located at one end of the main body, and the upper surface of the main body is higher than the upper surface of the extension part.

18. The fiber product of claim 17, wherein each of the fiber pieces has a first extension portion and a second extension portion, which are respectively disposed at two ends of the main body along a machining direction, and a length of the first extension portion is different from a length of the second extension portion.

19. The fiber product according to claim 18, wherein the vertical distance from the upper surface of the main body of each fiber element to the upper surface of the extension portion is defined as a depth, and the sum of the depth and the vertical distance from the upper surface of the extension portion to the lower surface of the extension portion is defined as a thickness of each fiber element, if the thickness is represented by T and the depth is represented by t1, the depth and the thickness satisfy the following formula:

20. The fiber product according to claim 17, wherein the polymer film material is a polyvinyl alcohol film, and the thickness is more than 3 microns and less than 100 microns.

21. A building material, characterized in that: The building material comprises the fiber product according to claims 17 to 20.

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