Device for assisting in testing dynamic thermal shrinkage of PET (Polyethylene Terephthalate) polyester film

Abstract

The utility model belongs to the field of testing devices, and relates to a device for assisting in testing the dynamic thermal shrinkage of a PET (Polyethylene Terephthalate) polyester film. The device for assisting in testing the dynamic thermal shrinkage of the PET polyester film comprises a first clamp, a first horizontal rod, a second horizontal rod and a second clamp, the clamping surface of the first clamp and the clamping surface of the second clamp are two opposite planes, and the clamping surface of the first clamp is a horizontal plane; the first horizontal rod and the second horizontal rod are parallel to the left-right direction, the first horizontal rod is located on the front side of the second horizontal rod, and the first horizontal rod and the second horizontal rod are distributed at intervals; the clamping face of the first clamp is located on the front side of the first horizontal rod and is lower than the first horizontal rod. The first clamp is used for clamping and fixing one end of the PET polyester film, and the second clamp is used for clamping and hanging the other end of the PET polyester film. The device can assist in simulating the actual processing environment of a downstream customer and judging whether the temperature resistance of the base membrane material can meet the actual requirement of the customer or not.

Description

Technical Field

[0001] The utility model belongs to the field of testing devices and relates to a device for assisting in testing the dynamic heat shrinkage of a PET polyester film. Background Art

[0002] At present, the temperature resistance test of polyester film is limited to the static heat shrinkage test. For example, patent CN202362259U discloses a heat shrinkage test device, which includes a connecting rod, either end of which can be connected to the sample, the connecting rod is placed in the guide mechanism and placed on the circumference of the test disc, the test disc is mounted on the support frame and connected to a rotating measuring device; the test disc rotates synchronously with the movement of the connecting rod. The device has a simple structure, is stable and reliable, and has a low cost.

[0003] However, downstream customers use PET polyester film base films for a large proportion of oven or coating, which requires reprocessing the PET polyester film base film on the basis of applying tension and heating at the same time. The above patent cannot effectively simulate the actual use environment of the film substrate by downstream customers, and thus cannot determine whether it can meet customer requirements.

[0004] Therefore, it is urgent to develop a device for assisting in testing the dynamic heat shrinkage of PET polyester film to meet customers' test requirements for the dynamic heat shrinkage of polyester film, simulate the production environment during reprocessing by downstream customers, and solve the problem that the static heat shrinkage test results meet the standards but cannot actually meet the needs of downstream customers. Utility Model Content

[0005] The utility model aims to solve the problems existing in the prior art and provide a device for assisting in testing the dynamic heat shrinkage of PET polyester film.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A device for assisting in testing the dynamic heat shrinkage of a PET polyester film, comprising a first clamp, a first horizontal rod, a second horizontal rod and a second clamp;

[0008] The clamping surface of the first clamp and the clamping surface of the second clamp are two opposite planes, and the clamping surface of the first clamp is a horizontal plane;

[0009] The first horizontal rod and the second horizontal rod are parallel to the left-right direction, the first horizontal rod is located in front of the second horizontal rod, and the two are spaced apart;

[0010] The clamping surface of the first clamp is located at the front side of the first horizontal rod and is lower than the first horizontal rod;

[0011] The first clamp is used to clamp and fix one end of the PET polyester film, and the second clamp is used to clamp and hang on the other end of the PET polyester film.

[0012] As the preferred technical solution:

[0013] The device for assisting in testing the dynamic heat shrinkage of PET polyester film as described above further comprises a horizontal plate a; the first horizontal rod and the second horizontal rod are both fixed on the horizontal plate a via two vertical rods.

[0014] As described above, a device for assisting in testing the dynamic heat shrinkage of PET polyester film, the first clamp is composed of the horizontal plate a, the horizontal plate b and the first connecting piece; the horizontal plate b is a long strip, and the length direction is parallel to the left and right direction; the horizontal plate b is placed on the horizontal plate a and is located in the front and lower part of the first horizontal rod, and the opposite surface of the horizontal plate b and the horizontal plate a is the clamping surface of the first clamp; the first connecting piece is used to detachably connect the horizontal plate a and the horizontal plate b.

[0015] In the device for assisting in testing the dynamic heat shrinkage of PET polyester film as described above, the horizontal plate b is a rectangular plate, and a long side of the horizontal plate b and the front edge of the first horizontal rod are located on the same vertical plane.

[0016] In the device for assisting in testing the dynamic heat shrinkage of PET polyester film as described above, the first connecting parts are two pairs of bolts and nuts.

[0017] The device for assisting in testing the dynamic heat shrinkage of PET polyester film as described above also includes two auxiliary handles, which are respectively fixed on the left and right sides of the horizontal plate a and are located between the first horizontal rod and the second horizontal rod.

[0018] As described above, in a device for assisting in testing the dynamic heat shrinkage of a PET polyester film, a first horizontal rod and a second horizontal rod are provided with strip holes whose lengths are parallel to the left and right directions for the PET polyester film to pass horizontally, and the hole walls of the strip holes are smooth. The presence of the strip holes is conducive to maintaining stable tension.

[0019] As described above, a device for assisting in testing the dynamic heat shrinkage of PET polyester film, the second clamp includes a quadrangular prism a, a quadrangular prism b and a second connecting piece; the quadrangular prism a and the quadrangular prism b are arranged in parallel, and the two opposite side surfaces are the clamping surfaces of the second clamp; the second connecting piece is used to detachably connect the quadrangular prism a and the quadrangular prism b.

[0020] In the device for assisting in testing the dynamic heat shrinkage of PET polyester film as described above, the second connecting members are two pairs of bolts and nuts.

[0021] As described above, a device for assisting in testing the dynamic heat shrinkage of a PET polyester film, the second connecting member includes two sliding rods, two springs and a baffle; the two sliding rods are parallel to each other and arranged at intervals; one end of the two sliding rods is fixedly connected to the baffle at the same time, and the other end passes through a quadrangular prism b and is fixedly connected to a quadrangular prism a; the two sliding rods are slidably connected to the quadrangular prism b; the two springs are respectively sleeved on the two sliding rods, and are compressed by the quadrangular prism b and the baffle; when the second connecting member is of this structure, the operation is more convenient, and the quadrangular prism a can be separated from the quadrangular prism b by only pushing the quadrangular prism b toward the baffle side, and then the PET polyester film can be inserted between the quadrangular prism a and the quadrangular prism b. After releasing the quadrangular prism b, the quadrangular prism b is quickly reset under the action of the spring, and the PET polyester film is clamped together with the quadrangular prism a.

[0022] As described above, in the device for assisting in testing the dynamic heat shrinkage of PET polyester film, the quadrangular prism a and the quadrangular prism b are both formed by a plurality of cubic blocks connected by insertion or magnetic force, and the weight of each cubic block is the same, so that the weight of the second fixture can be quickly adjusted by increasing or decreasing the number of cubic blocks.

[0023] The device for assisting in testing the dynamic heat shrinkage of a PET polyester film as described above also includes a scale plate, which is fixed between a first horizontal bar and a second horizontal bar. The scale plate is provided with scale lines parallel to the front-to-back direction and scale lines parallel to the left-to-right direction. In this way, the shrinkage values ​​of the PET polyester film along the front-to-back direction and the left-to-right direction before and after the test can be quickly read, and the shrinkage rate can be quickly obtained.

[0024] Beneficial effects:

[0025] (1) The device for assisting in testing the dynamic heat shrinkage of PET polyester film of the utility model can fix the PET polyester film substrate, control the weight of the second clamp, place the device and the base film material in an oven under simulated effective tension, and compare the heat shrinkage values ​​under experimental conditions before and after the test to simulate the actual processing environment of downstream customers and determine whether the temperature resistance of the base film material can meet the actual requirements of customers.

[0026] (2) The second clamp of the device for assisting in testing the dynamic heat shrinkage of PET polyester film of the utility model is composed of cubic blocks of the same weight that are plug-in connected or magnetically connected, and the second clamp is consistent with the width of the film body, and the tension is directly applied to the film body itself. Compared with traditional counterweights, it has the characteristics of strong tension stability and uniform force. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a device for assisting in testing the dynamic heat shrinkage of PET polyester film according to the utility model;

[0028] Figure 2 is a schematic diagram of a second connecting member;

[0029] Among them, 1-horizontal plate b, 2-horizontal plate a, 3-first horizontal rod, 4-vertical rod, 5-second horizontal rod, 6-quadrangular prism a, 7-quadrangular prism b, 8-auxiliary handle, 9-sliding rod, 10-spring, 11-baffle. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0031] Example 1

[0032] A device for assisting in testing the dynamic heat shrinkage of PET polyester film, such as Figure 1 As shown, it includes a first clamp, a first horizontal rod 3, a second horizontal rod 5, a second clamp, an auxiliary handle 8 and a scale plate;

[0033] The first clamp is composed of a horizontal plate a2, a horizontal plate b1 and a first connecting member, and is used to clamp and fix one end of the PET polyester film;

[0034] The horizontal plate b1 is a rectangular plate, and its length direction is parallel to the left-right direction;

[0035] The horizontal plate b1 is placed on the horizontal plate a2 and is located in front of and below the first horizontal rod 3 ( Figure 1 The direction of the middle arrow is the front-to-back direction), the opposite surface of the horizontal plate b1 and the horizontal plate a2 is the clamping surface of the first clamp, and a long side of the horizontal plate b1 and the front edge of the first horizontal rod 3 are located on the same vertical plane;

[0036] The first connecting member is two pairs of bolts and nuts, used to connect the horizontal plate a2 and the horizontal plate b1;

[0037] The first horizontal rod 3 and the second horizontal rod 5 are parallel to the left-right direction, the first horizontal rod 3 is located in front of the second horizontal rod 5, and the two are spaced apart;

[0038] The first horizontal rod 3 and the second horizontal rod 5 are both fixed on the horizontal plate a 2 through two vertical rods 4;

[0039] The first horizontal rod 3 and the second horizontal rod 5 are provided with strip holes with a length parallel to the left-right direction for the PET polyester film to pass horizontally, and the hole walls of the strip holes are smooth;

[0040] The scale plate is fixed between the first horizontal rod 3 and the second horizontal rod 5, and the scale plate is provided with scale lines parallel to the front-to-back direction and scale lines parallel to the left-to-right direction;

[0041] The second clamp includes a quadrangular prism a 6, a quadrangular prism b 7 and a second connecting member, and is used to clamp and hang on the other end of the PET polyester film;

[0042] The quadrangular prism a 6 and the quadrangular prism b 7 are arranged in parallel, and the two opposite sides are the clamping surfaces of the second clamp;

[0043] The quadrangular prism a 6 and the quadrangular prism b 7 are both formed by a plurality of cubic blocks connected by insertion or magnetic force, and each cubic block has the same weight;

[0044] The second connecting member is two pairs of bolts and nuts, used to connect the quadrangular prism a 6 and the quadrangular prism b 7;

[0045] There are two auxiliary handles 8, which are fixed on the left and right sides of the horizontal plate a2 respectively, and are located between the first horizontal rod 3 and the second horizontal rod 5.

[0046] Example 2

[0047] A device for assisting in testing the dynamic heat shrinkage of a PET polyester film, which is basically the same as that of Example 1, except that: the structure of the second connecting member;

[0048] like Figure 2 As shown, the second connecting member includes two slide bars 9, two springs 10 and a baffle 11;

[0049] The two slide bars 9 are parallel to each other and arranged at a distance;

[0050] One end of the two slide bars 9 is fixedly connected to the baffle 11, and the other end passes through the quadrangular prism b 7 and is fixedly connected to the quadrangular prism a 6;

[0051] Two sliding rods 9 are slidably connected to the quadrangular prism b 7;

[0052] The two springs 10 are respectively mounted on the two slide bars 9 and compressed by the quadrangular prism b 7 and the baffle 11 .

[0053] The specific steps of using the device for assisting in testing the dynamic heat shrinkage of PET polyester film of the utility model to perform an auxiliary heat shrinkage test are as follows:

[0054] (1) Place the sample (dust-free, oil-free, wrinkle-free PET film, size 100×450 mm) neatly and upright on the grid paper, then draw a coordinate axis parallel to the longitudinal and transverse directions (with the grid paper as the standard) in the middle of the sample, and use a ruler to accurately cut two longitudinal and transverse markings on the coordinate axis (control the length of the markings within 100±2 mm);

[0055] (2) Fix one end of the marked specimen along the length direction to the first fixture and the other end to the second fixture in the following manner: Figure 1 As shown, the weight of the second clamp can be adjusted according to actual conditions;

[0056] (3) Place the auxiliary test device for dynamic heat shrinkage of PET polyester film with the sample with marked lines fixed in a 150°C oven for 10-30 minutes, take out the sample and cool it to room temperature, observe the scale, and record the length of the marked line of the sample after baking;

[0057] (4) Replace the sample and repeat the above steps. After obtaining 4 sets of data, calculate the thermal shrinkage rate of each group according to the formula (thermal shrinkage rate (%) = (marked line length before heating - marked line length after heating) / marked line length before heating × 100%) and take the average value.

Claims

1. A device for assisting in testing the dynamic heat shrinkage of PET polyester film, characterized in that: It comprises a first clamp, a first horizontal rod (3), a second horizontal rod (5) and a second clamp; The clamping surface of the first clamp and the clamping surface of the second clamp are two opposite planes, and the clamping surface of the first clamp is a horizontal plane; The first horizontal rod (3) and the second horizontal rod (5) are parallel to the left-right direction, the first horizontal rod (3) is located in front of the second horizontal rod (5), and the two are spaced apart; The clamping surface of the first clamp is located on the front side of the first horizontal rod (3) and is lower in height than the first horizontal rod (3); The first clamp is used to clamp and fix one end of the PET polyester film, and the second clamp is used to clamp and hang on the other end of the PET polyester film.

2. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 1, characterized in that: It also includes a horizontal plate a (2); a first horizontal rod (3) and a second horizontal rod (5) are both fixed on the horizontal plate a (2) via two vertical rods (4).

3. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 2, characterized in that: The first clamp is composed of the horizontal plate a (2), the horizontal plate b (1) and the first connecting member; the horizontal plate b (1) is a long strip, the length direction of which is parallel to the left-right direction; the horizontal plate b (1) is placed on the horizontal plate a (2) and is located in front of and below the first horizontal rod (3); the opposite surface of the horizontal plate b (1) and the horizontal plate a (2) is the clamping surface of the first clamp; The first connecting member is used to detachably connect the horizontal plate a (2) and the horizontal plate b (1).

4. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 3, characterized in that: The horizontal plate b (1) is a rectangular plate, and one long side of the horizontal plate b (1) and the front edge of the first horizontal rod (3) are located on the same vertical plane.

5. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 2, characterized in that: It also includes auxiliary handles (8), the number of which is two and which are respectively fixed on the left and right sides of the horizontal plate a (2) and are located between the first horizontal rod (3) and the second horizontal rod (5).

6. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 1, characterized in that: The first horizontal rod (3) and the second horizontal rod (5) are provided with strip holes with a length parallel to the left-right direction for the PET polyester film to pass horizontally, and the hole walls of the strip holes are smooth.

7. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 1, characterized in that: The second clamp comprises a quadrangular prism a (6), a quadrangular prism b (7) and a second connecting member; the quadrangular prism a (6) and the quadrangular prism b (7) are arranged in parallel, and the two opposite side surfaces are the clamping surfaces of the second clamp; the second connecting member is used to detachably connect the quadrangular prism a (6) and the quadrangular prism b (7).

8. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 7, characterized in that: The second connecting member is two pairs of bolts and nuts; or, the second connecting member includes two slide bars (9), two springs (10) and a baffle (11); the two slide bars (9) are parallel to each other and arranged at intervals; one end of the two slide bars (9) is fixedly connected to the baffle (11) at the same time, and the other end passes through the quadrangular prism b (7) and is fixedly connected to the quadrangular prism a (6); the two slide bars (9) are slidably connected to the quadrangular prism b (7); the two springs (10) are respectively sleeved on the two slide bars (9) and compressed by the quadrangular prism b (7) and the baffle (11).

9. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 7, characterized in that: The quadrangular prism a (6) and the quadrangular prism b (7) are both formed by a plurality of cubic blocks connected by insertion or magnetic force, and the weight of each cubic block is the same.

10. The device for assisting in testing the dynamic heat shrinkage of PET polyester film according to claim 1, characterized in that: It also includes a scale plate, which is fixed between the first horizontal rod (3) and the second horizontal rod (5), and is provided with scale lines parallel to the front-rear direction and scale lines parallel to the left-right direction.

Images