Sampling tool for measuring thermal shrinkage of biaxially oriented polyester film

Abstract

The invention belongs to the technical field of polyester film measurement, and particularly relates to a biaxially oriented polyester film thermal shrinkage measurement sampling tool. The tool comprises a marking plate, and a through marking opening is formed in the plate surface of the marking plate. During sampling, the tool is placed at the position of a polyester film needing to be sampled, the polyester film is tightly pressed on a glass table top through the marking plate, the marking tool is used for marking along the marking opening of the marking plate, after marking is completed, the cutting tool is used for cutting along the edge of the marking plate, the tool is moved away, and a marked heat shrinkage sample with the proper size is obtained. The sample preparation speed and efficiency are greatly improved, the operation steps are simplified, and the sample preparation process is quicker, simpler and more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of polyester film measurement, and in particular relates to a sampling tool for measuring heat shrinkage of a biaxially stretched polyester film. Background Art

[0002] The thermal shrinkage of polyester film is calculated according to the following formula: S = (L1-L2) / L1×100%, where S is the thermal shrinkage of the film (unit %); L1 is the length before heating (unit mm); L2 is the length after heating (unit mm). Therefore, it is necessary to make a sample before measurement and calibrate the length of L1. The commonly used method is to cut a sample of appropriate size and place it on a grid paper for marking.

[0003] When using the current method to measure the thermal shrinkage of polyester film and prepare samples, there is a large human error. The film sample is prone to relative sliding when calibrated on the grid paper, resulting in marking errors. Different operators operate the samples, and the samples vary greatly. In addition, the traditional sampling method is time-consuming and labor-intensive, inefficient, and cannot quickly prepare samples. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present invention mainly aims at the above problems and proposes a biaxially oriented polyester film heat shrinkage measurement sampling tool, the purpose of which is to solve the problems of large sample preparation error, low sample preparation efficiency and long sample preparation time in the existing sample preparation.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides a biaxially oriented polyester film heat shrinkage measurement sampling tool, the tool comprising a marking plate, the plate surface of the marking plate is provided with a through marking opening, and the plate surface of the marking plate is flat.

[0008] Furthermore, a handle is provided on the surface of the marking plate.

[0009] Furthermore, the marking opening is a cross-shaped groove, a straight-shaped groove or an L-shaped groove.

[0010] Furthermore, the marking plate is square or rectangular.

[0011] Furthermore, the flatness of the marking plate is within 1 mm.

[0012] Furthermore, the marking opening is located at the center line of the marking plate.

[0013] Furthermore, the edge of the marking plate close to the marking port is provided with scale values.

[0014] Furthermore, the handle and the marking plate are welded together by argon arc welding.

[0015] Furthermore, the handle is made of stainless steel round steel.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a biaxially oriented polyester film heat shrinkage measurement sampling tool, which effectively solves multiple problems in the traditional sample preparation method by using a marking plate. First, the marking port on the marking plate allows the operator to mark on the polyester film in a highly precise manner. This design significantly reduces the marking error during calibration. Secondly, the marking plate with a flat surface presses the film to be marked to prevent slippage during marking, thereby ensuring the stability of the tool and keeping the sample fixed during operation, further reducing errors. In addition, the sample to be tested is directly cut along the edge of the marking plate to obtain a uniform size, which greatly improves the speed and efficiency of sample preparation, simplifies the operating steps, and makes the sample preparation process faster and easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a biaxially oriented polyester film heat shrinkage measurement sampling tool disclosed in this application.

[0019] Figure 2 This is a top view of the structural diagram of a biaxially oriented polyester film heat shrinkage measurement sampling tool disclosed in this application.

[0020] Figure 3 This is a main structural diagram of a biaxially oriented polyester film heat shrinkage measurement sampling tool disclosed in this application.

[0021] The reference numerals shown in the figure are: 1. handle; 2. marking plate; 3. marking port. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] See also Figure 1-Figure 3 FIG. 1 is a schematic diagram of a biaxially oriented polyester film heat shrinkage measurement sampling tool provided in a preferred embodiment of the present application. Figure 1-Figure 3 In the illustrated embodiment, the tool comprises a marking plate 2, a plate surface of the marking plate 2 is provided with a through marking opening 3, and the plate surface of the marking plate 2 is a plane.

[0026] The through marking port 3 allows a marking tool (such as a pen) to directly contact the film below, thereby accurately positioning and marking. The marking plate 2 with a flat surface can press the film to be marked on the table to prevent the film from slipping when the marking tool is marking and affecting the marking accuracy, making the entire sampling process more efficient and accurate.

[0027] Preferably, a handle 1 is provided on the surface of the marking plate 2. When sampling, the tool is placed on the position of the polyester film where sampling is required, the handle 1 is grasped to press the polyester film tightly on the table, and the marking tool is used to mark along the marking port 3 of the marking plate 2.

[0028] like Figure 1 As shown, the technical solution adopted by the present invention is: a 3mm stainless steel plate is used to make a square marking plate 2 that meets the sample preparation requirements, the marking opening 3 is a cross-shaped groove opened in the middle along the center line, the width is suitable for the size of the marking tool, and the length is determined according to the marking size. The edges and the middle position are polished flat and free of burrs to ensure that the flatness is within 1mm, and the handle 1 is made of 3mm diameter stainless steel round steel, which is made of a whole piece, and the rounded corners are bent using a bending equipment. The two ends are polished flat and free of burrs. The handle 1 and the marking plate 2 are welded together by argon arc welding to ensure that the welding point is smooth and free of burrs. After the electric welding is completed, the flatness of the marking plate is guaranteed to be within 1mm. If there is an error after welding, it needs to be checked for flatness.

[0029] Preferably, in addition to the cross-shaped groove, the marking port 3 can also be a straight groove or an L-shaped groove; the shape of the marking plate 2 can also be a rectangle or other polygonal structure, which is determined according to the shape of the film. For example, after the marking is completed, a cutting tool is used to cut along the edge of the marking plate, and the tool is removed to obtain a marked and appropriately sized heat shrinkable sample.

[0030] Preferably, the edge of the marking plate 2 near the marking opening 3 is provided with scale values, and after marking with a marking tool, the marked dimension length can be directly read.

[0031] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present application is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by the same unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0032] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A biaxially oriented polyester film heat shrinkage measurement sampling tool, characterized in that: The tool comprises a marking plate, a plate surface of which is provided with a through marking opening, and the plate surface of the marking plate is a plane.

2. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 1, characterized in that: A handle is arranged on the plate surface of the marking plate.

3. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 1, characterized in that: The marking opening is a cross-shaped groove, a straight-shaped groove or an L-shaped groove.

4. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 1, characterized in that: The marking plate is square or rectangular.

5. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 1, characterized in that: The flatness of the marking plate is within 1 mm.

6. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 1, characterized in that: The marking opening is located at the center line of the marking plate.

7. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 1, characterized in that: The edge of the marking plate close to the marking port is provided with scale values.

8. The biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 2, characterized in that: The handle and the marking plate are welded together by argon arc welding.

9. A biaxially oriented polyester film heat shrinkage measurement sampling tool according to claim 2, characterized in that: The handle is made of stainless steel round steel.

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