A device and method for quickly evaluating the solubility of glass fiber chopped strand mat in styrene

Abstract

The present invention provides a device for quickly evaluating the solubility of glass fiber chopped strand mat in styrene, comprising a transparent container for containing a styrene solution, the liquid level of the styrene solution reaching the bottom of an upper clamp; an upper clamp and a lower clamp, a glass fiber chopped strand mat sample being clamped between the upper clamp and the lower clamp; a support frame for installing the upper clamp; a tray for holding the broken sample and the lower clamp; the lower clamp and the tray are located in the transparent container; the length of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp is (98-102) mm, and the width is (98-102) mm; the ratio of the mass of the lower clamp to the vertical distance between the bottom of the lower clamp and the bottom support surface of the tray is (98-102) g: (49.5-50.5) mm. The device can quickly evaluate the solubility of the chopped strand mat in styrene, and can reduce the harm of styrene to the human body. It also improves efficiency.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a device and method for quickly evaluating the solubility of glass fiber chopped strand mat in styrene. Background Art

[0002] Styrene is a volatile, toxic liquid that is very harmful to the human body. Therefore, it is very important to quickly evaluate the solubility of glass fiber chopped strand mat in styrene and reduce the contact time with it. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a device and method for quickly detecting the solubility of glass fiber chopped strand mat in styrene, which can quickly evaluate the solubility of glass fiber chopped strand mat in styrene and reduce harm to the human body.

[0004] The present invention provides a device for quickly evaluating the solubility of glass fiber chopped strand mat in styrene, comprising a transparent container for containing a styrene solution, wherein the liquid level of the styrene solution reaches the bottom of an upper clamp;

[0005] An upper fixture and a lower fixture, the glass fiber chopped strand mat sample is clamped between the upper fixture and the lower fixture;

[0006] A support frame, used for mounting the upper fixture;

[0007] Tray, used to hold the specimen and lower fixture after fracture;

[0008] The lower fixture and the tray are located in the transparent container;

[0009] The length of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp is (98-102) mm, and the width is (98-102) mm;

[0010] The ratio of the mass of the lower clamp to the vertical distance between the bottom of the lower clamp and the bottom supporting surface of the tray is (98-102) g: (49.5-50.5) mm.

[0011] Preferably, the glass fiber chopped strand mat sample between the upper clamp and the lower clamp has a length of 100 mm and a width of 100 mm.

[0012] Preferably, the mass of the lower clamp is (98-102) g; and the vertical distance between the bottom of the lower clamp and the tray is 50 mm.

[0013] Preferably, the tray is a round screen.

[0014] Preferably, the volume of the transparent container is at least 5L.

[0015] Preferably, the support frame is overlapped on the transparent container.

[0016] The present invention provides a method for quickly evaluating the solubility of glass fiber chopped strand mat in styrene by using the device described in the above technical solution, comprising the following steps:

[0017] Clamp the glass fiber chopped strand mat sample to be tested between the upper clamp and the lower clamp, so that the length of the sample between the upper and lower clamps is (98-102) mm and the width is (98-102) mm; then put it into a transparent container filled with styrene solution, start timing when the upper clamp contacts the upper edge of the transparent container, stop timing when the lower clamp contacts the tray, and record the time;

[0018] If 0<recording time≤15s, it indicates that the glass fiber chopped strand mat sample has good solubility in styrene;

[0019] If 15s<recording time≤30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is qualified;

[0020] If the recorded time is greater than 30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is unqualified.

[0021] Preferably, the glass fiber content in the glass fiber chopped strand mat sample to be tested is 95wt%≤glass fiber content<100wt%.

[0022] Preferably, the number of the glass fiber chopped strand mat samples to be tested is 3 to 6.

[0023] Preferably, the recorded time is an average value of test results of multiple samples.

[0024] The invention provides a device for quickly evaluating the solubility of glass fiber chopped strand mat in styrene, comprising a transparent container for containing a styrene solution, wherein the liquid level of the styrene solution reaches the bottom of an upper clamp; an upper clamp and a lower clamp, wherein a glass fiber chopped strand mat sample is clamped between the upper clamp and the lower clamp; a support frame for installing the upper clamp; a tray for supporting the broken sample and the lower clamp; the lower clamp and the tray are located in the transparent container; the length of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp is (98-102) mm, and the width is (98-102) mm; the ratio of the mass of the lower clamp to the vertical distance between the bottom of the lower clamp and the bottom supporting surface of the tray is (98-102) g:(49.5-50.5) mm. The device clamps the glass fiber chopped strand mat sample to be tested between the upper fixture and the lower fixture. By controlling the length and width of the sample, as well as the ratio of the mass of the lower fixture to the vertical distance between it and the tray, the timing starts when the upper fixture contacts the upper edge of the transparent container, and the sample begins to dissolve in the styrene solution. After the sample breaks, it will fall together with the lower fixture, and the timing stops when the lower fixture contacts the tray. The solubility of the sample in styrene is evaluated based on the recorded time. The device can quickly evaluate the solubility of chopped strand mat in styrene, and can reduce the harm of styrene to the human body. It also improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a device for quickly evaluating the solubility of glass fiber chopped strand mat in styrene provided by the present invention;

[0026] Figure 2 It is a schematic diagram of the sample of Example 1;

[0027] Figure 3 This is a schematic diagram of the detection process of Example 1 of the present invention. DETAILED DESCRIPTION

[0028] The present invention provides a device for quickly evaluating the solubility of glass fiber chopped strand mat in styrene, comprising a transparent container for containing a styrene solution, wherein the liquid level of the styrene solution reaches the bottom of an upper clamp;

[0029] An upper fixture and a lower fixture, the glass fiber chopped strand mat sample is clamped between the upper fixture and the lower fixture;

[0030] A support frame, used for mounting the upper fixture;

[0031] Tray, used to hold the specimen and lower fixture after fracture;

[0032] The lower fixture and the tray are located in the transparent container;

[0033] The length of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp is (98-102) mm, and the width is (98-102) mm;

[0034] The ratio of the mass of the lower clamp to the vertical distance between the bottom of the lower clamp and the bottom supporting surface of the tray is (98-102) g: (49.5-50.5) mm.

[0035] See also Figure 1 , Figure 1 Schematic diagram of the device for quickly detecting the solubility of glass fiber chopped strand mat in styrene provided by the present invention, wherein 1 is a transparent container, 2 is a tray, 3 is a lower clamp, 4 is a glass fiber chopped strand mat sample, 5 is a support frame, and 6 is an upper clamp.

[0036] The device provided by the present invention comprises a transparent container 1, which is used to contain a styrene solution, and the liquid level of the styrene solution reaches the bottom of the upper clamp. The sample can be immersed in the styrene solution. The mass concentration of the styrene solution is 99.99%; the d 20 =0.907. In the present invention, in order to improve the accuracy of detection, the volume of the transparent container is preferably at least 5 L. In a specific embodiment, the transparent container is a beaker.

[0037] The device provided by the present invention comprises an upper clamp 6 and a lower clamp 3, and a glass fiber chopped strand mat sample 4 is clamped between the upper clamp and the lower clamp.

[0038] The device provided by the present invention comprises a support frame 5, and the support frame 5 is used to install the upper clamp. The support frame preferably uses a combination of bolts and nuts to fix the upper clamp. The support frame is preferably overlapped on the transparent container.

[0039] The device provided by the present invention includes a tray 2, and the tray is used to hold the broken sample and the lower fixture. In the present invention, the tray 2 is preferably a round screen. The tray 2 is preferably fixed to the transparent container by several iron wires. In a specific embodiment, the iron wire is preferably passed through the holes of the round screen and hung on the edge of the transparent container.

[0040] In the present invention, the lower fixture and the tray are located in the transparent container.

[0041] The length of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp is (98-102) mm, preferably (99-101) mm, and more preferably 100 mm; the width is (98-102) mm, preferably (99-101) mm, and more preferably 100 mm.

[0042] The ratio of the mass of the lower fixture to the vertical distance between the bottom of the lower fixture and the bottom support surface of the tray is (98-102) g: (49.5-50.5) mm, preferably (98-102) g: 50 mm. In a specific embodiment, the mass of the lower fixture is (98-102) g; the vertical distance between the bottom of the lower fixture and the tray is 50 mm.

[0043] The present invention provides a method for quickly evaluating the solubility of glass fiber chopped strand mat in styrene by using the device described in the above technical solution, comprising the following steps:

[0044] Clamp the glass fiber chopped strand mat sample to be tested between the upper clamp and the lower clamp, so that the length of the sample between the upper and lower clamps is (98-102) mm and the width is (98-102) mm; then put it into a transparent container filled with styrene solution, start timing when the upper clamp contacts the upper edge of the transparent container, stop timing when the lower clamp contacts the tray, and record the time;

[0045] If the recording time is ≤15s, it indicates that the glass fiber chopped strand mat sample has good solubility in styrene;

[0046] If 15s<recording time≤30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is qualified;

[0047] If the recorded time is greater than 30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is unqualified.

[0048] In the present invention, the glass fiber content in the glass fiber chopped strand mat sample is 95wt%≤glass fiber content<100wt%.

[0049] The present invention preferably cuts a 100mm×140mm sample evenly distributed from the entire width of the felt roll; the distance between the sample and the edge of the felt roll is ≥10mm, and the long side is parallel to the length direction of the felt sheet. After clamping, the length of the sample between the upper clamp and the lower clamp is (98-102)mm, preferably (99-101)mm; the width is (98-102)mm, preferably (99-101)mm; in a specific embodiment, the length of the sample between the upper clamp and the lower clamp is 100mm, and the width is 100mm.

[0050] The number of the glass fiber chopped strand mat samples to be tested is 3 to 6. If there are multiple samples, the recording time is preferably the average value of the test results of the multiple samples. If there are 3 samples, the recording time of each is s1, s2 and s3, then the recording time is (s1+s2+s3) / 3; or if there are 5 samples, the recording time of each is s1, s2, s3, s4 and s5, then the recording time is (s1+s2+s3+s4+s5) / 5.

[0051] If 0<recording time≤15s, it indicates that the glass fiber chopped strand mat sample has good solubility in styrene;

[0052] If 15s<recording time≤30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is qualified;

[0053] If the recorded time is greater than 30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is unqualified.

[0054] The present invention preferably rounds the arithmetic mean of multiple samples to about 1 second. The shorter the time, the better the solubility of the chopped strand mat in styrene. If no breakage occurs within 30 seconds, the test is terminated and a new sample is prepared for testing.

[0055] The glass fiber chopped strand mat with good and qualified solubility in styrene in the above test meets the quality requirements of customers and will not be complained due to quality problems. The recorded time can also reflect the solubility of the glass fiber chopped strand mat in styrene; if the solubility in styrene is good, the dissolution time is less than or equal to 15s; if the solubility in styrene is qualified, the dissolution time is between 15s and 30s; if the solubility in styrene is unqualified, the dissolution time is greater than 30s.

[0056] To further illustrate the present invention, a device and method for quickly evaluating the solubility of glass fiber chopped strand mat in styrene provided by the present invention are described in detail below in conjunction with embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0057] Example 1

[0058] Cut evenly distributed across the entire width of the felt roll. Figure 2 At least five 100mm×140mm specimens as shown (the distance between the specimen and the edge is ≥10mm, and the long side is parallel to the length direction of the felt); Figure 3 This is a schematic diagram of the detection process of Example 1 of the present invention, wherein a is a clamp clamping the test sample, b is the sample placed in styrene, and c is the end of the test.

[0059] according to Figure 2 The process shown is carried out by: Figure 1 The upper and lower clamps shown clamp the ends of the glass fiber chopped strand mat specimen and ensure that a rectangular area of ​​100mm×100mm is left between the clamps;

[0060] Place the round sieve in a beaker containing styrene, immerse the fixture and the sample in pure styrene, and ensure that the liquid level of the styrene solution reaches the bottom of the upper fixture. At this time, the vertical distance between the bottom of the lower fixture and the bottom support surface of the round sieve should be 50mm; the mass of the lower fixture is 100±2g;

[0061] Start timing when the upper fixture contacts the edge of the beaker, and stop timing when the lower fixture contacts the round sieve. Record the time shown on the stopwatch in (s);

[0062] s1 is 7s, s2 is 7s, s3 is 9s, s4 is 8s, and s5 is 9s. Calculate the arithmetic mean of the measured values ​​of the five samples and round them off to 1s, (s1+s2+s3+s4+s5) / 5=8s.

[0063] The above test value of 8s<15s indicates that the glass fiber chopped strand mat sample has good solubility in styrene and meets the customer's use requirements. The above device can quickly evaluate the solubility of chopped strand mat in styrene and reduce the harm of styrene to the human body.

[0064] It can be seen from the above embodiments that the present invention provides a device for quickly evaluating the solubility of glass fiber chopped strand mat in styrene, comprising a transparent container for containing a styrene solution, the liquid level of the styrene solution reaching the bottom of an upper clamp; an upper clamp and a lower clamp, the glass fiber chopped strand mat sample being clamped between the upper clamp and the lower clamp; a support frame for installing the upper clamp; a tray for supporting the broken sample and the lower clamp; the lower clamp and the tray are located in the transparent container; the length of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp is (98-102) mm, and the width is (98-102) mm; the ratio of the mass of the lower clamp to the vertical distance between the bottom of the lower clamp and the bottom support surface of the tray is (98-102) g:(49.5-50.5) mm. The device clamps the glass fiber chopped strand mat sample to be tested between the upper fixture and the lower fixture. By controlling the length and width of the sample, as well as the ratio of the mass of the lower fixture to the vertical distance between it and the tray, the timing starts when the upper fixture contacts the upper edge of the transparent container, and the sample begins to dissolve in the styrene solution. After the sample breaks, it will fall together with the lower fixture, and the timing stops when the lower fixture contacts the tray. The solubility of the sample in styrene is judged based on the recorded time. The device can quickly evaluate the solubility of chopped strand mat in styrene, and can reduce the harm of styrene to the human body. It also improves efficiency.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for rapidly evaluating the solubility of glass fiber chopped strand mat in styrene, comprising the following steps: Clamp the glass fiber chopped strand mat sample to be tested between the upper clamp and the lower clamp, so that the length of the sample between the upper and lower clamps is (98~102) mm and the width is (98~102) mm; then put it into a transparent container filled with styrene solution, start timing when the upper clamp contacts the upper edge of the transparent container, stop timing when the lower clamp contacts the tray, and record the time; If 0<recording time≤15s, it indicates that the glass fiber chopped strand mat sample has good solubility in styrene; If 15s<recording time≤30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is qualified; If the recording time is greater than 30s, it indicates that the solubility of the glass fiber chopped strand mat sample in styrene is unqualified; The device for rapidly evaluating the solubility of glass fiber chopped strand mat in styrene comprises a transparent container for containing a styrene solution, wherein the liquid level of the styrene solution reaches the bottom of the upper fixture; An upper fixture and a lower fixture, the glass fiber chopped strand mat sample is clamped between the upper fixture and the lower fixture; A support frame, used for mounting the upper fixture; Tray, used to hold the specimen and lower fixture after fracture; The lower fixture and the tray are located in the transparent container; The ratio of the mass of the lower clamp to the vertical distance between the bottom of the lower clamp and the bottom supporting surface of the tray is (98~102)g:(49.5~50.5)mm.

2. The method according to claim 1, characterized in that The length and width of the glass fiber chopped strand mat sample between the upper clamp and the lower clamp are 100 mm.

3. The method according to claim 1, characterized in that The mass of the lower clamp is (98~102) g; the vertical distance between the bottom of the lower clamp and the bottom supporting surface of the tray is 50 mm.

4. The method according to claim 1, characterized in that The tray is a round screen.

5. The method according to claim 1, characterized in that The volume of the transparent container is at least 5L.

6. The method according to claim 1, characterized in that The support frame is overlapped on the transparent container.

7. The method according to claim 1, characterized in that The glass fiber content in the glass fiber chopped strand mat sample to be tested is 95wt%≤glass fiber content<100wt%.

8. The method according to claim 1, characterized in that The number of the glass fiber chopped strand mat samples to be tested is 3 to 6.

9. The method according to claim 8, characterized in that The recorded time is the average of the test results of multiple specimens.

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