TW200417465A - Multi-layer films having at least three bias-cut layers - Google Patents

Abstract

The present invention is directed to multi-layer films having three or more layers of bias-cut film where at least two layers have different machine direction angles. More specifically, the present invention is directed to cross laminated films with three or more bias-cut film layers each having a machine direction angle between 20 DEG and 70 DEG, where at least two layers have different direction angles.

Description

/ H-UJ V. Description of the invention (1) 1. [Technical field to which the invention belongs] It is a kind of single-layer film with multiple layers, and this thermoplastic film is oriented by the direction of the device. This multilayer was cut out in the prior art. There is a production of two layers of staggered laminated film. The thermoplastic film enters a thermoplastic film at an angle of ± 45, and then forms a two layered staggered laminated layer. The invention referred to here with a single axial travel is a multilayer beveled layer film. A multilayer beveled film made of a thermoplastic film f axially cut out at different bevel angles to change the shape of the thermoplastic film. Second: [Prior technology], the present invention: It is an improvement of a multi-layer film, ^ W ^ 膘 is manufactured from the same oblique cutting angle; the degree of uni-axially traveling thermoplastic film composition i; during the cutting process The original single-axial row was pressed into two to produce a mechanical direction with a 45 degree mechanical direction ;: a thermoplastic film with a mechanical direction angle of 45 degrees: ,,, and the two layers of the thermoplastic film at an angle of + 45 degrees The machine direction angle on = changes with the angle of the miter cutting tool. In the first & technology, this kind of multilayer film is basically manufactured in three steps. As shown in the _ ra _ film, the first step is to generate a roll of a single axial travel 1, 1, 1 as the second. As shown in the figure, the second step is to obliquely cut the film to change the film. The surface step is to laminate two oblique cut films to form a staggered laminated multilayer film. Diyi really = as shown in the first picture, this film generating device is shown in device 10, more Akashi "said, pour a thermoplastic film resin into an extruder 丨 3 hopper j 2

Page 4 200417465 V. Description of the invention (2) After 'this thermoplastic film passes through a pierce and introduces gas (usually air; the forming mold 14 in: = is a ring to form a bubble 1 5, this vertical, #, out Of the thermoplastic film resin and the roller η before the cooling bubble 15 'will reach the roller layer and the continuous continuous film tube rolls will be squeezed to form-two before reaching the roller 18, roughly 3 = by rolling Roller 16 and roller 17 will pass through one or more rollers 19 =: ground =, and then the film tube will be in segment 2. The film tube will be here: a series of stretching and tempering each -Each roller 21 is stretched in the axial direction (stretched by the thin middle roller 21). The ideal situation is that the film tube will be stretched in the direction of the square. The film is stretched after the oven, and the tube is passed through the earth. When the unwinding of the film tube roll 25, these two shapes are combined * As shown in the fourth figure, the machine of the film tube 26 = the direction on the roll 25 is made in the entire film ^ =: = = = here is wound in a cylindrical shape Z on the winder 24 = this = tubular or cylindrical "squeeze", this is called a plywood or film tube. A chamfering device 30 is shown in the second figure. The completed film tube roll 25 will be placed in a film unit 26 by two rollers. This rotation will pass through the rotating device 31, which will move γ and # 32, and will open the film. Tube 26, roller 33 This thin page 5 200417465 V. Description of the invention (3) The membrane tube 2 6 is sequestered from a thin film 9 c, ^ $ correction, s roll 25 is pulled out, this 溥 tube will be in the air Developed on the side of the mandrel 34, # a ^ v ^ Naifang mandrel 34 has an independent motor and an ancient name ^ ^, which is called the mandrel rotation. The film tube will be chamfered by the chamfering cutter 3 5 ^ a 4 5. In this prior art, the amount of change in angle is about 2 and ， obliquely! # The formed film 3 7 will be wound on a cylindrical roll. Winder 38, this tubular winder has an independent track & drive motor to 4M Division and rolls film 37 into a film roll 39, this film 37 is a — + ^ One layer, special film instead of a film tube, as shown in the fifth figure, the mechanical direction angle of this film is ± 45 degrees.

As shown in the third figure, a device 40 for manufacturing a staggered laminated film is provided with a film roll 39 wound from a film 37 on a film unroller 41 and another film roll wound from a film 37 On the film expander 42, the film 43 and the film 44 are unfolded respectively. The two films travel toward each other and have the same mechanical direction angle as shown in the figure. Then, the two films are clamped by a pressure roller 45 and a cooling roller 46. . There is an extrusion forming die 47 above the joint between the roller 45 and the roller 46. This extrusion forming die extrudes a pressing agent. In a preferred case, the composition of the film 43 and the film 44 includes polyethylene. And the pressing agent is a mixture of polyethylene '"Extruder 4 8 continuously provides the pressing agent to the extrusion forming die 4 7 in

Through the fast cooling point between the pressure roller 45 and the cooling roller 46, the pressing agent f is squeezed into the thin film 43 and the thin film 44 to form a thin film. The roller cuts this = the wrong pressing film 50 is vertical. The staggered laminated film is wound on the winding body 52 after the traveling direction. As shown in the staggered laminated film between the roller 49 and the winder 52, the mechanical direction angles on the two beveled films are staggered with each other. 200417465 V. Description of the invention (4) The third machine is the same as the third film. Need to emphasize the angle, as in the previous step, the obliques of the composite film are staggered with each other. The two layers of the film are oblique in one direction. As shown in the figure, the bidirectional angle and the mechanical direction of the 疋 are mentioned in the prior art. A four-beveled cutting layer has the characteristics of a phase and the cutting layer will face the same direction with two thin and pressed and will still be thin on m. Film. For example, the machine of the direction angle and the other two film rolls 37 have the same unfolding angle to each other. In the technology, the machine of the above-mentioned lamination of the layers has the same films 43 and 44. There is only one kind of oblique cutting and lamination in Figure 5. Because of this directional angle, the layers will be oriented in the same course. Although the film can be further shown in the mechanical direction of the laminating film, the pressing of these oblique cutting layers is staggered. The same as the other two, [invention content] The present invention is a multilayer film, there are many: bevel cut layers, of which at least two bevel cut layers ^, at least three or more layers, especially a staggered pressure Combined multilayer films with the same mechanical orientation angle. The chamfered layer of the evening layer, the mechanical side of each chamfered layer contains at least two layers, and at least two chamfered layers have different angles between 20 degrees and 70 degrees. Embodiment 4 • Inventive Mode] Some embodiments will be described in detail, such as τ Ru Tianshu, and the present invention can also be widely used. However, with the exception of poems, the scope of the present invention is not limited to the implementation of the proposed embodiment. The scope of patent application filed on 4 sides shall prevail. , Also the restrictions of

200417465 V. Description of the invention (5) Generally speaking, the present invention can use all the equipment of the prior art. However, the present invention is different from the prior art in that it is used to manufacture multilayer films composed of angle films with different mechanical directions. The manufacturing process and structure in the process must be modified to produce films with the same width. Some of the widths must be manufactured with equipment of different sizes, as in the beveling device of the second figure. When the beveling angle is less than 4 5 At the end of the day, the film cut by the film tube 2 6 will be wider than the film cut with a bevel angle of 45 degrees. Similarly, when the bevel angle is greater than 45 degrees, the tube 2 6 The film cut out will be narrower than the thin film cut at an oblique cutting angle of 45 degrees. This result will hinder the efficiency of manufacturing. It will not have the same width when combined. As the beveled film is changed to 37 m ^ of the film cut out obliquely from the film tube 26, the uniformity of the width is quite Ϊ3: ^ :: This is based on the prior art, and step 1 in all processes is also silk. In order to make Manufacturing effective system. It is necessary to strictly control the selective pressure by a unified operating specification. It is impossible for the present invention not to require σ: the required mechanical direction angle is only different = different, at least two layers of the multi-layer film selected with the same mechanical direction angle are available. Can also be different: μ, however, the starting point on the film required for the manufacture of various different sizes of equipment, that is, the starting point for adjusting the parameters of the equipment, is in the range of the direction angle, no matter which of the above, there is a significant difference in mechanical direction Corner film,

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The thinness of the same mechanical direction angle on the process or equipment makes the cut out film with a significantly different pressure. The film must also be adjusted when the film has the same number of times.

In addition, the parameter width on the manufacturing process or equipment. The hair 14 cuts out the production device tube 26 with the manufactured adjusting foot 30. The rollers and rolls are used after the circle has been used, and the diameters are not the same. The perimeter is preferably thinner than the required thickness to produce a length less than The device around the device can only make the continuous application of the film of the center of rotation with a different circumference of the film having a film width. The other one uses a press forming machine 1 3 with a single shaft and another film tube, which requires two stretching and processing to deal with different widths with a single diameter and the shaft 3 4 to process in the tube 0 tube 26, long gas direction Then the thickness of the false toughness must be such that the film is produced in an extruded bubble 15 and can be said at least the required film. It is provided with two film processing sections 20 with film tubes, and different diameters of the device 1 0 The bevel cutting device made at the controller requires one film production device in two films and different cutting device sections or adjustable

> In the manufacturing process of the present invention, many types of thermoplastic films can be manufactured. Among them, the best thermoplastic films are polyfines, especially polyethylene and polypropylene. ). In the present invention, the joint of the preferred lamination process is a film in a mixture of polyethylene and a chamfered polyethylene film and low-density polyethylene. This film does not have a mechanism for extruding a laminating agent on two films. The laminating agent is a high degree of polymerization, and the laminating agent will become a multi-layer film without the direction angle being oblique. When using

200417465 V. Description of the invention (7) In the process of laminating two chamfered layers, the dust mixture produces another thin film layer, so a multi-layer film will be produced. However, the so-called lamination process includes any two Multilayer film. = Square η, for example, heat-sealing and melting-to produce another layer of film. These processes are to use the heat generated in the roll film or add an adhesive to the periphery of the film at any point on the wide edge of the film, and reduce the above. All methods are "42; in the layer: the characteristics of the multilayer film which can be used in the present invention will be described below in a preferred embodiment. A polyethylene resin will: The melt blown into bubbles 15 widened the extruder's f-film tube 'film tube and then stretched the disk: the film bubbles will be squeezed out of a film tube roll 25 which advances in the axial direction. , And then wound into the same extrusion conditions, bubble size, and stretched fish conditions, that is, under the roller speed of the process:; refining process section and winding section film tube roll 25. roll ,, "Another early-axial travel: a roll of polyethylene film tube 25 will be placed on the mandrel 34 and moved on the mandrel 34, the bevel cutting tool 35 will be slanted ^ 3 and then the clothes will be unrolled = official roll 25 cut into two rolls of bevel cut Film ", chamfered film will be 40 degrees, the first oblique: the width of the film is nominally 59 inches, winding / degree, the two rolls of chamfered film will Developed on ± 40—such as two β, from the film expander 41 and 4: staggered laminated film as shown in Figure 6 (c). 200417465 V. Description of the invention (8) The aforementioned manufacturing process will be repeated It is used to make two rolls of film roll 39 made of film 37. Here, the air bubbles during the film manufacturing process are large and the chamfering angle of the chamfering cutter 35 is ± 53 degrees. The width of this film is nominally 59 inches. As shown in Figure 6 (d) and Figure 6 (e), these two rolls of film 37 made of the chamfered film 37 have a mechanical orientation angle of ± 53 degrees, and these two rolls of chamfered film It will be unrolled from the film expanders 41 and 42 in the direction as shown in the third figure to produce a staggered laminated film as shown in the sixth figure (f). This two-roll three-layer staggered laminated film is as the sixth As shown in Figures (c) and (f), they are placed on the film expanders 41 and 42 and expanded and staggered to form a seven-layer staggered laminated layer with four oblique cutting angles. ), The arrow is not shown in the sixth figure (g), because a roll of film with a mechanical direction angle of ± 53 degrees may be a roll with a mechanical direction angle of ± 40 degrees. The film rolls are laminated together front and back, so the direction of the mechanical direction angle in the laminated film is optional. The ± sign before the chamfered angle or the number of the mechanical direction angle indicates that the tolerance is ± 2 degrees. Similarly, the nominal width is used within the tolerance of the least damaged film. The most obvious physical property strengthened in the present invention is the tear resistance of the film. The film formed by single axial travel is easy to travel mechanically. Tearing in the direction of the film. This property has been strengthened from staggered laminated films in the prior art.

200417465 V. Description of the invention (9) In the present invention, the thin-tear-resistant property is much stronger. Another preferred practical manufacturing procedure in this ignorance is to produce four% = oblique cut of 43 degrees, ± 48 degrees, and ± 56 degrees according to the above-mentioned implementation '~ the machine direction angle is ± 46 degrees, and its parent A staggered laminated film was formed by cross-pressing, and then Jiang ^ chose two layers of beveled film; synthesized another staggered laminated film, and then 2 staggered the remaining two layers of beveled film; Staggered lamination films often synthesize different mechanical orientation angles. When each of the chamfered layers in the first and second films has a thickness of ^, the preferred method is to use the multilayer of the mechanical direction angle on the film to 50 degrees, however, this does not: the change of the angles to each other Between 3 range 'products made in this way will: J: $ limit mechanical direction angle penetration application 2 mouths that could not be applied in the prior art: two, tear resistance, moon logo. The product 如 σ is only a preferred embodiment of the present invention, as described in the slogan or banner on the Kanban board, and the patent scope is claimed. Such changes should still be made without departing from the essence of the present invention. Therefore, the scope of the present invention is defined by the scope of the following patent applications:

Page 12 200417465 Brief description of the drawings 5. Simple illustration of the diagram The first diagram shows an isometric coordinate view of a thermoplastic film device in the prior art; the second diagram shows an oblique cutting device in the prior art Isometric view, the third figure shows an isometric coordinate view of a prior art press-beveled film cutting device; the fourth figure shows an upper view of the mechanical direction angle of the film before cutting in the prior art. Figure 5 shows a top view of the four-layer multilayer film in the prior art, where each layer (1), (2), (3), (4) has the same mechanical direction angle beveled film; and Figure 6 shows The two films (a) and (b) have a mechanical direction angle and are staggered to form a staggered laminated film (c). The two films (d) and (e) have a different mechanism from the two films (a) and (b). The directional angles are alternately laminated to form a laminated laminated film (f), and then the two laminated laminated films (c) and (f) are laminated into the multilayer film (g) in the present invention. Explanation of symbols: 1 0 film generating device 12 feed hopper 1 3 extrusion former 1 4 forming die 1 5 air bubble

Page 13 200417465 Simple illustration of the drawing 16 Roller 17 Roller 18 Roller 1 9 Roller 2 0 Stretching and toughening process 21 Roller

22 roller 2 3 driving roller 24 cylindrical winder 2 5 film tube roll 2 6 film tube 3 0 beveling device 3 1 rotating device 32 motor 33 roller .3 4 rotating mandrel 3 5 beveling cutter 37 film

38 Cylindrical winder 3 9 Film roll 4 0 Device for manufacturing staggered laminated film 4 1 Film unroller 42 Film unroller 43 Film

Page 14 200417465 Brief description of the drawings 44 Film 4 5 Pressure roller 4 6 Cooling roller 4 7 Extrusion die 4 8 Extruder 49 Roller 50 Staggered lamination film 5 2 Winder

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Claims (1)

200417465 6. Scope of patent application Patent scope: 1. A multi-layer film including: at least three layers of beveled thermoplastic film, at least two of the three layers of beveled thermoplastic film have different mechanical direction angles . 2. The multilayer film according to item 1 of the patent application scope, wherein the thermoplastic film comprises a polyolefin. 3. The multilayer film according to item 2 of the patent application scope, wherein the polyolefin comprises polyethylene 〇4. A multilayer film comprising: at least three layers of beveled thermoplastic film, the beveled thermoplastic film respectively With different mechanical orientation angles. 5. In the case of the multilayer film under the scope of patent application No. 4, the change of the mechanical direction angle is between 3 degrees and 50 degrees. 6. If the multilayer film of item 4 of the patent application, the mechanical direction angle is between 20 degrees and 70 degrees. 7. The multi-layer film according to item 4 of the scope of patent application, wherein the multi-layer film includes four layers of oblique cut polyene film, and the mechanical direction angle of two layers in the oblique cut poly-dilute film is 200417465 The mechanical direction angle of the other two layers is ± 53 degrees. 8. The multilayer film according to item 4 of the patent application, wherein the multilayer film includes at least four beveled layers having different mechanical orientation angles. 9. The multilayer film according to item 4 of the patent application, wherein the multilayer film includes four layers of beveled polyolefin films, and each layer of the beveled polyolefin films has different mechanical direction angles. 10. If the multilayer film according to item 9 of the patent application scope, those with the smallest difference in the mechanical direction angle among the beveled polyolefin films will not be adjacent to each other. 11. A multi-layer staggered laminated film comprising: at least three layers of a beveled thermoplastic film having a mechanical direction angle, the beveled thermoplastic film comprising at least two beveled layers having different mechanical direction angles. 1 2. If the multi-layer staggered laminated film according to item 11 of the patent application scope, the mechanical direction angle is between 20 degrees and 70 degrees. 1 3. According to the multi-layer staggered laminated film of item 11 of the scope of application for patent, the multilayer staggered laminated film includes four layers of oblique cut polyene film, and the mechanical direction angle of two layers in the four-layer oblique cut polyene film is ± 40 degrees and the mechanical orientation angle of the other two layers is ± 53 degrees. 1 4. If the multi-layer staggered laminated film according to item 11 of the patent application scope, the thermoplastic film Page 17 200417465 6. Scope of patent application Including polyethylene. Page 18