JP4948457B2 - Inspection method of polymer granular material - Google Patents

Description

  The present invention relates to a method for inspecting a polymeric particulate material comprising a plurality of polymeric particulates.

  Granular thermoplastic resins and thermoplastic elastomers (hereinafter referred to as polymer granules) are used as materials for powder slush molding and the like. In a polymer particle material containing a plurality of polymer particles, aggregates of polymer particles may be formed during transportation, storage, and continuous molding (so-called blocking). If molding is performed using a polymer particle material in which agglomerates of polymer particles are generated, the quality of the obtained molded product is deteriorated. For this reason, conventionally, the polymer particle material is inspected before molding to determine whether or not the polymer particles are aggregated. As a method for inspecting such polymer granular materials, generally, aggregates of polymer granules are obtained based on the shape and amount of the polymer granular material that has passed through the sieve and did not pass through the sieve. A method was used to evaluate whether this occurred. However, since the sieving work varies from worker to worker, the results of discrimination by this inspection method also vary from worker to worker.

  Patent Document 1 introduces a technique for evaluating the fluidity of a developer (toner or the like) using a powder rheometer. If this technique is diverted, it is considered that it is possible to accurately determine whether or not aggregates of polymer particles are generated based on the fluidity of the polymer particle material.

By the way, in powder slush molding or the like, the polymer particles are placed in an environment that easily aggregates, such as being exposed to a high temperature during molding. Therefore, if the polymer particles are easy to aggregate, they may be aggregated at the time of actual molding (specifically immediately before molding) even if it is determined that they are not aggregated at the time of inspection. According to the method introduced in Patent Document 1, it is possible to determine whether or not aggregates of polymer particles are generated, but the ease of aggregation of polymer particles cannot be evaluated. For this reason, development of the inspection method which can evaluate the ease of aggregation of a polymer particle is desired.
JP 2007-114751 A

  This invention is made | formed in view of the said situation, and it aims at providing the inspection method of the polymer particle material which can evaluate the ease of aggregation of a polymer particle.

A method for inspecting a polymer granular material of the present invention that solves the above problems is a method for inspecting a polymer granular material for powder slush molding, the polymer granular material comprising a plurality of polymer particles Measure the preparatory process to put the sample into the measurement container, the compression process to compress the polymer granular material by applying a load to the polymer granular material in the measurement container, and the polymer granular material after the compression process It is attached to an inspection device having a probe in a state where it is contained in a container, and is inserted into the polymer granular material while rotating the probe, so that the load in the insertion direction applied to the probe and the load in the rotation direction applied to the probe are A measuring step for measuring at least one of the measuring particles , and in the measuring step, a conditioning treatment is performed to reverse the rotation of the measuring element before the measurement and to insert the polymer particle material into the polymer particle material so as to equalize the particle size of the polymer particle material. , in the measurement process And evaluating the aggregate ease of polymer granules on the basis of the boss was loads.

  The method for inspecting a polymer granular material of the present invention preferably includes any one of the following (1) to (6). More preferably, a plurality of (1) to (6) are provided.

  (1) In the measuring step, at least a rotational load applied to the measuring element is measured.

  (2) In the measurement step, both a load in the insertion direction applied to the probe and a load in the rotational direction applied to the probe are measured.

  (3) In the compression step, the polymer granular material is compressed while being heated at a temperature lower than its melting temperature.

(4) load applied to the polymer or granular material in the compression step ^{is 20.4g / cm 2 ~509g / cm 2} .

  (5) The heating temperature in the said compression process is 50 degreeC or more below the melting temperature of the said polymer granular material.

  (6) The inspection device is a powder rheometer.

  When a polymer particle material containing a plurality of polymer fluids is compressed, the polymer particles in the polymer particle material are pressed against each other. For this reason, polymer particles that easily aggregate are aggregated. Therefore, in the method for inspecting a polymer particle material according to the present invention, polymer particles that easily aggregate are aggregated by a compression process.

  In the measurement process, the measuring element is inserted into the polymer particle material after the compression process, that is, the polymer particle material in which the polymer particles that easily aggregate are aggregated, and the load in the insertion direction applied to the measuring element (hereinafter referred to as insertion) At least one of a load in the rotation direction applied to the probe (hereinafter referred to as a rotation load). When the polymer particles aggregate, the insertion load and the rotational load increase. For this reason, based on at least one of the insertion load and the rotational load measured in the measurement process, it can be determined whether or not aggregates of polymer particles are generated in the polymer particle material after the compression process. It can be determined whether or not the molecular particles easily aggregate. Therefore, according to the method for inspecting a polymer particle material of the present invention, the ease of aggregation of the polymer particles (hereinafter referred to as aggregation property) can be evaluated. Hereinafter, it is said that it is easy to agglomerate that the cohesion is large, and that it is difficult to coagulate is that the cohesion is small.

  According to the method for inspecting a polymer particle material of the present invention, the aggregation property of the polymer particles can be evaluated with high accuracy by mechanically measuring at least one of the insertion load and the rotational load.

  According to the method for inspecting a polymer particle material of the present invention including the above (1) to (2), the aggregation property of the polymer particles can be evaluated with higher accuracy. The difference between the rotational load of the polymer particle material in which the polymer particles are not aggregated and the rotational load of the polymer particle material in which the polymer particles are aggregated is that the polymer particles are aggregated. This is because the insertion load of the non-polymer particle material is larger than the difference between the insertion load of the polymer particle material in which the polymer particles are aggregated.

  According to the method for inspecting a polymer granular material of the present invention comprising the above (3), the polymer particles can be aggregated with high reliability by compressing while heating the polymer particles in the compression step. obtain. For this reason, according to the inspection method of the polymer particle material of the present invention provided with the above (3), the aggregation property of the polymer particles can be evaluated with high accuracy. Note that by setting the heating temperature to a temperature lower than the melting temperature of the polymer particle material, the polymer particles can be aggregated with high reliability while avoiding the fixation of the polymer particles due to melting of the polymer particle material. obtain.

  According to the method for inspecting a polymer particle material of the present invention having the above (4), polymer particles having high cohesiveness can be aggregated with high reliability in the compression step. For this reason, according to the inspection method of the polymer particle material of the present invention having the above (4), the cohesiveness of the polymer particles can be evaluated with higher accuracy.

  According to the method for inspecting a polymer particle material of the present invention having the above (5), the polymer particles having high cohesiveness can be aggregated more reliably in the compression step. For this reason, according to the inspection method of the polymer particle material of the present invention having the above (5), the cohesiveness of the polymer particles can be evaluated with higher accuracy.

  According to the polymer particle material inspection method of the present invention having the above (6), the aggregation property of the polymer particles can be evaluated inexpensively and with high reliability. This is because a powder rheometer which is a general inspection device is used.

  The polymer particle material used in the method for inspecting a polymer particle material of the present invention may consist of only a plurality of polymer particles, or may contain sub-materials other than the polymer particles. For example, when a sub-material made of a resin material that is less cohesive than the polymer particles and having a smaller diameter than the polymer particles is attached to the surface of the polymer particles, the sub-material is placed in the gap between the polymer particles. Intervenes. For this reason, it becomes difficult for the polymer particles to come into pressure contact with each other, and aggregation of the polymer particles is suppressed.

  The inspection device used in the method for inspecting a polymer granular material of the present invention has a measuring element. The measuring element only needs to be capable of rotating at least. That is, the work of inserting the measuring element into the polymer granular material may be performed manually by the measurer. For example, when the measuring element is rotated and the operator brings the measuring container and the polymer granular material close to the measuring element, the rotating measuring element can be inserted into the polymer granular material. However, in order to eliminate variations in evaluation and increase the reliability of evaluation, it is preferable that the probe itself moves toward the measurement container and the polymer granular material while rotating.

  The inspection apparatus used in the method for inspecting a polymer granular material according to the present invention includes a sensor for detecting insertion load and a sensor for detecting rotational load. As these sensors, a known load sensor, acceleration sensor, angular velocity sensor, or the like may be used. The rotational speed of the probe or the insertion speed of the probe may be appropriately set according to the type and particle size of the polymer particles used, the shape of the measurement container, and the like. In addition, when using the elastomer powder for slush molding as a polymer particle, it is preferable that the insertion speed of the measuring element is about 26.4 mm / min to 1575.2 mm / min. Moreover, when using the elastomer powder for slush shaping | molding as a polymer granule, it is preferable that the rotational speed of a measuring element is about 2.0 rpm-119.4 rpm.

  According to the method for inspecting a polymer particle material of the present invention, the agglomeration property of polymer particles of various sizes can be evaluated, but the agglomeration property of polymer particles having an average particle diameter of about 0.01 mm to 1.0 mm. It is particularly preferably used for evaluating. Further, according to the method for inspecting polymer granular material of the present invention, the cohesiveness of polymer particles made of various materials can be evaluated, but thermoplastic polyurethane elastomer, thermoplastic olefin elastomer, styrene thermoplastic elastomer, chloride It is particularly preferably used for evaluating the cohesiveness of polymer particles composed of vinyl-based thermoplastic elastomers, thermoplastic polyester elastomers, thermoplastic polyamide elastomers and the like.

In the compression step of the method for inspecting a polymer particle material of the present invention, the larger the load applied to the polymer particle material, the more the polymer particles having a smaller cohesiveness can be aggregated. On the other hand, in order to agglomerate polymer particles having high cohesiveness, the load applied to the polymer particles in the compression step may be small. For this reason, what is necessary is just to set suitably the load added to a polymer particle in a compression process according to the magnitude | size of the cohesiveness which should be evaluated. If the polymer granules polymer granules 160ml per 20.4g ^/ cm ² ~509g ^/ cm 2 load applied to the compression process, without aggregating the relatively cohesive small polymeric granular material, aggregation Highly reliable polymer particles can be aggregated with high reliability.

  The temperature at which the polymer particle material is heated in the compression step may be any temperature that is less than the melting temperature of the polymer particle material, and can be set as appropriate for each type of polymer particle material. Note that the higher the heating temperature, the more highly agglomerated polymer particles can be aggregated with higher reliability.

  Hereinafter, the method for inspecting a polymer granular material of the present invention will be described by way of example.

Example 1
GS200 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer particle material used in the method for inspecting the polymer particle material of Example 1. The polymer granular material is a thermoplastic polyurethane elastomer particle. Further, the melting temperature of the polymer granular material is 180 ° C.

(Preliminary process)
The polymer granular material was placed in a dryer set at 50 ° C. and dried for 16 to 20 hours. Five samples of 300 to 400 ml of the dried polymer particle material placed in a 500 ml PE tube were prepared (Samples 1 to 5), and the weights of the polymer particle materials of Samples 1 to 5 were measured. Thereafter, water was added to each of the polymer granular materials of Samples 1 to 5 based on the measured weight. The water added here was pure water after the ion exchange treatment. Water was added while stirring the polymer granular material of each sample.

  Specifically, water was not added to the polymer granular material of Sample 1. The polymer particle material of Sample 2 was added with an amount of water of 0.3% by mass with respect to the mass (100% by mass) of the polymer particle material after addition of water. The polymer particle material of Sample 3 was added with water in an amount of 0.8% by mass relative to the mass (100% by mass) of the polymer particle material after addition of water. The polymer particle material of Sample 4 was added with water in an amount of 1.3% by mass with respect to the mass (100% by mass) of the polymer particle material after addition of water. The polymer particle material of Sample 5 was added with an amount of water of 1.8% by mass with respect to the mass (100% by mass) of the polymer particle material after addition of water.

  The dried polymeric particulate material contains about 0.2% by weight water. For this reason, the polymer granule material of Sample 1 after water addition contains about 0.2% by mass of water, and the polymer granule material of Sample 2 after water addition contains about 0.5% by mass. Sample 3 after addition of water contains about 1.0% by mass of water, and sample 4 after addition of water contains about 1.5% by mass. % Of water is contained, and the polymer granular material of Sample 5 after the addition of water contains about 2.0 mass% of water. After the addition of water, in order to disperse the water throughout the polymer granular material, the PE tubes of Samples 1 to 5 were capped, further sealed with polyvinyl tape, and left at room temperature for about 20 to 70 hours.

  By adding different amounts of water to the polymer particle material of each sample, samples 1 to 5 having different aggregation properties of the polymer particles were obtained. The samples 1 to 5 were subjected to the following preparation step to measurement step, thereby evaluating the cohesiveness of each sample.

(Preparation process)
The preparatory step in Example 1 is a step of putting the polymer granular material after the preliminary step into a measurement container.

  As the measurement container 1, a vessel kit (split vessel kit C203 50X160ML) for a powder rheometer FT4 described later was used. As shown in FIG. 1, the vessel kit has an upper cylinder body 11 and a lower cylinder body 12. Both the inner diameters of the upper cylinder body 11 and the lower cylinder body 12 are 50 mm. A substantially ring-shaped lower ring frame 13 is fixed to the outer periphery of the upper end of the lower cylinder 12. A substantially ring-shaped upper ring frame 14 is fixed to the outer periphery of the lower end of the upper cylinder 11. The upper ring frame 14 is pivotally supported by the lower ring frame 13. Therefore, the upper ring frame 14 and the upper cylindrical body 11 are rotatable between the first position shown in FIG. 1 and the second position shown in FIG. In the first position, the upper cylindrical body 11 and the upper ring frame 14 are fixed coaxially with the lower cylindrical body 12 and the lower ring frame 13, and the lower surface of the upper ring frame 14 is on the upper surface of the lower ring frame 13. The inside of the upper cylinder 11 and the inside of the lower cylinder 12 communicate with each other. In the second position, the inside of the lower cylinder 12 is exposed.

  First, the measurement container 1 was assembled, and the upper cylindrical body 11 and the upper ring frame 14 were arranged at the first position shown in FIG. Next, a little over 160 ml of the polymer granular material after the preliminary process was put into the upper cylinder 11 and the lower cylinder 12 from above the upper cylinder 11. Then, the measurement container 1 containing the polymer granular material was lightly struck 20-30 times on a test bench (so-called tapping). By this tapping process, the entire lower cylinder 12 and a part of the upper cylinder 11 were filled with the polymer granular material. At this time, when the volume of the polymer granule material became 160 ml or less, the polymer granule material was added and lightly tapped. After the tapping process, as shown in FIG. 2, the upper cylinder 11 and the upper ring frame 14 were rotated to the second position, and the polymer granular material filled in the lower cylinder 12 was worn. By this operation, the lower cylinder 12 was filled with 160 ml of the polymer granular material.

(Compression process)
The compression step in Example 1 is a step of compressing the polymer particle material by heating the polymer particle material contained in the measurement container 1 while applying a load.

  First, the convex protrusions on the outer surface of a 180 ml flat bottom jar (PFA flat bottom jar No. 15283E 0103L, outer diameter 49 mm, manufactured by Sampla Tech) were scraped off with a cutter knife to make the outer diameter of the flat bottom jar uniform (49 mm). Iron powder (No. 19416-45 CP80 mesh manufactured by Nacalai Tesque) was placed in this flat bottom jar so that the mass of the flat bottom jar combined with the lid was 500.0 g. What closed the lid | cover of the flat bottom jar which put iron powder firmly was used as the load body 2 for compression.

  After the preparation step, the upper cylindrical body 11 and the upper ring frame 14 were rotated to the first position. And as shown in FIG. 3, the load body 2 was inserted in the upper cylinder 11, and the load was applied to the polymer granular material with which the lower cylinder 12 was filled. In this state, the measurement container 1, the polymer granular material, and the load body 2 are placed in an unillustrated environmental test apparatus (various general-purpose environmental test apparatuses manufactured by Espec Corporation), and the polymer granular material is compressed at 50 ° C. for 3 hours. did. Since the melting temperature (180 ° C.) of the polymer granular material exceeds 50 ° C., the polymer granular material is not melted by this step.

(Measurement process)
In the measurement process in Example 1, the polymer granular material after the compression process is attached to the inspection device in a state of entering the measurement container 1, and inserted into the polymer granular material while rotating the probe of the inspection device. This is a step of measuring the insertion load and the rotational load.

  In the measurement process in Example 1, a powder rheometer (Powder Rheometer FT4 manufactured by Freeman Technology) was used as an inspection device. A general powder rheometer has a function of performing a conditioning process (a process of making the particle size of the sample uniform by inserting the probe into the sample while rotating the probe backward) before measurement. However, when the conditioning treatment is performed, there is a high possibility that the polymer particles aggregated in the compression process are separated again. For this reason, in Example 1, the conditioning process was not performed, but the insertion load and rotational load of the polymer granular material as it was after the compression process were measured.

  Specifically, the measuring container 1 was attached to an inspection apparatus, and a measuring piece (powder rheometer blade) was inserted into the compressed polymer granular material while rotating. The rotational speed of the probe at this time was 39.8 rpm, and the insertion speed was 525.1 mm / min. A 48 mm-diameter blade that is an accessory of the above-described device (FT4) was used as the measuring element.

  The graph showing the insertion load of samples 1 to 5 measured in the measurement process is shown in FIG. 4, the graph showing the rotation load of samples 1 to 5 is shown in FIG. 5, and the sum of the insertion load and rotation load of samples 1 to 5 is shown. A graph showing (hereinafter referred to as total load) is shown in FIG.

(Comparative Example 1)
In the inspection method for the polymer particle material of Comparative Example 1, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 1. In other words, in the method for inspecting the polymer particle material of Comparative Example 1, the insertion load and the rotational load of the polymer particle material in an uncompressed state are measured.

(Measurement process)
After the measurement step in the method for inspecting a polymer granular material of Example 1, the measurement container 1 is attached to an inspection apparatus, and the polymer particles stirred once with a measuring element in the method for inspecting a polymer granular material in Example 1 The probe was inserted into the body material while rotating the probe again. The inspection apparatus is the same as the inspection apparatus used in Example 1, and the rotational speed and insertion speed of the measuring element are also the same as in Example 1.

  The graph showing the insertion load of samples 1 to 5 measured in the measurement process of Comparative Example 1 is shown in FIG. 4, the graph showing the rotational load of samples 1 to 5 is shown in FIG. 5, and the total load of samples 1 to 5 is shown. A graph is shown in FIG.

(Comparative Example 2)
In the method for inspecting the polymer particle material in Comparative Example 2, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Comparative Example 1. In other words, in the method for inspecting the polymer granular material of Comparative Example 2, the insertion load and the rotational load of the polymer granular material in a state where it is not further compressed than Comparative Example 1 are measured.

(Measurement process)
After the measurement step in the method for inspecting the polymer granular material of Comparative Example 1, the measuring container 1 is attached to the inspection apparatus, and the method for inspecting the polymer granular material in Example 1 and Comparative Example 1 is used twice with a measuring element. The measuring element was inserted into the stirred polymer particle material while rotating again. The inspection apparatus is the same as the inspection apparatus used in Example 1, and the rotational speed and insertion speed of the measuring element are also the same as in Example 1.

  The graph showing the insertion load of samples 1 to 5 measured in the measurement process of Comparative Example 2 is shown in FIG. 4, the graph showing the rotational load of samples 1 to 5 is shown in FIG. 5, and the total load of samples 1 to 5 is shown. A graph is shown in FIG.

(Comparative Example 3)
In the method for inspecting the polymer particle material of Comparative Example 3, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Comparative Example 2. In other words, in the method for inspecting the polymer granular material of Comparative Example 3, the insertion load and the rotational load of the polymer granular material in a state where it is not further compressed than Comparative Example 2 are measured.

(Measurement process)
After the measurement step in the method for inspecting the polymer granular material of Comparative Example 2, the measuring container 1 is attached to the inspection apparatus, and the total is measured with a measuring element in the method for inspecting the polymer granular material in Example 1 and Comparative Examples 1-2. The measuring element was inserted into the polymer particle material stirred three times while rotating again. The inspection apparatus is the same as the inspection apparatus used in Example 1, and the rotational speed and insertion speed of the measuring element are also the same as in Example 1.

  A graph showing the insertion load of samples 1 to 5 measured in the measurement process of Comparative Example 3 is shown in FIG. 4, a graph showing the rotational load of samples 1 to 5 is shown in FIG. 5, and the total load of samples 1 to 5 is shown. A graph is shown in FIG.

(Evaluation of cohesiveness 1)
As shown in FIG. 4, the insertion load of samples 1 to 5 measured by the inspection method of Example 1 is much larger than the insertion load of samples 1 to 5 measured by the inspection method of Comparative Examples 1 to 3. Moreover, according to the inspection method of Example 1, the difference in insertion load between the samples is much larger than that of Comparative Examples 1 to 3. From this result, according to the inspection method of the polymer material of Example 1, the polymer particle material having a large water content (the polymer particle material having a high cohesiveness of the polymer particles) and the water content being small. It can be seen that the polymer particle material (the polymer particle material having a small aggregation property of the polymer particles) can be distinguished with high accuracy, and the aggregation property of the polymer particles can be evaluated with high accuracy. Note that the insertion loads of Samples 1 to 5 measured in the measurement process of Example 1 are Sample 1 <Sample 2 <Sample 3 <Sample 4 <Sample 5. This is because the water contents of Samples 1 to 5 are Sample 1 <Sample 2 <Sample 3 <Sample 4 <Sample 5.

  Moreover, the difference (FIG. 5) between the rotational load of the samples 1 to 5 measured by the inspection method of Example 1 and the rotational load of the samples 1 to 5 measured by the inspection method of Comparative Examples 1 to 3 is the same as that of Example 1. It is much larger than the difference (FIG. 4) between the insertion load of samples 1 to 5 measured by the inspection method and the insertion load of samples 1 to 5 measured by the inspection methods of Comparative Examples 1 to 3. From this result, when evaluating the cohesiveness of the polymer particles based on the rotational load, the cohesiveness of the polymer particles is compared to when evaluating the cohesiveness of the polymer particles based on the insertion load. It can be seen that can be evaluated with higher accuracy.

  Furthermore, as shown in FIG. 6, when evaluating the cohesiveness of the polymer granular material based on the total load, the measurement value by the inspection method of Example 1 and the measurement value by the measurement methods of Comparative Examples 1 to 3 And the difference is even greater. From this result, it can be seen that when the aggregation property of the polymer particles is evaluated based on the total load (that is, the sum of the insertion load and the rotational load), the aggregation property of the polymer particles can be evaluated with higher accuracy. .

  The difference between the inspection method for the polymer particle material of Example 1 and the inspection method for the polymer particle material of Comparative Examples 1 to 3 is the presence or absence of the compression step. For this reason, it can be said that the inspection method of the polymer particle material of the present invention can accurately evaluate the cohesiveness of the polymer particles by including a compression step.

  In addition, when powder slush molding is performed using a thermoplastic polyurethane elastomer (GS200) having a moisture content of 0.5% by mass or less, a molded product having excellent quality can be obtained. In other words, when powder slush molding is performed using the polymer granular materials of Sample 1 and Sample 2, a molded product with excellent quality can be obtained.

  For this reason, when evaluating the cohesiveness of the polymer particle material based on the insertion load, if the insertion load is 300 mJ or less, the aggregation property of the polymer particle material is sufficiently small and suitable for powder slush molding. Can be evaluated.

  Also, when evaluating the cohesiveness of polymer particles based on rotational load, the coagulability of the polymer particle material is sufficiently small and suitable for powder slush molding if the rotational load is 1350 mJ or less. , And can be evaluated.

  Further, when evaluating the aggregation property of the polymer particles based on the total load, the aggregation property of the polymer particle material is sufficiently small and suitable for powder slush molding if the total load is 1650 mJ or less. , And can be evaluated.

(Example 2)
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material of Example 2 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 2 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression step in Example 2 is the same as the compression step in Example 1 except that the heating temperature is 23 ° C.

  Sample 1 prepared in the preliminary process of Example 2 contains about 0.2% by mass of water, Sample 2 contains about 0.5% by mass of water, and Sample 3 contains about 1.0% by mass. % Water is contained, and sample 4 contains about 1.5% by weight water. In addition, regarding Examples 3 to 10 described later, the water content of Samples 1 to 4 prepared in the preliminary process is the same as that of Example 2. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Example 2 is shown in FIG.

(Comparative Example 4)
In the inspection method for the polymer particle material of Comparative Example 4, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 2. The measurement process of Comparative Example 4 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 4 is shown in FIG.

(Comparative Example 5)
In the inspection method for the polymer particle material of Comparative Example 5, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 4. The measurement process of Comparative Example 5 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 5 is shown in FIG.

(Comparative Example 6)
In the method for inspecting the polymer particle material in Comparative Example 6, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Comparative Example 5. The measurement process of Comparative Example 6 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 6 is shown in FIG.

(Example 3)
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material of Example 3 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 3 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression step in Example 3 is the same as the compression step in Example 1 except that the heating temperature is 40 ° C. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of samples 1 to 4 measured in the measurement process of Example 3 is shown in FIG.

(Comparative Example 7)
In the inspection method for the polymer particle material of Comparative Example 7, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 3. The measurement process of Comparative Example 7 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 7 is shown in FIG.

(Comparative Example 8)
In the inspection method for the polymer particle material of Comparative Example 8, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 7. The measurement process of Comparative Example 8 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 7 is shown in FIG.

(Comparative Example 9)
In the inspection method for the polymer particle material of Comparative Example 9, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 8. The measurement process of Comparative Example 9 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 9 is shown in FIG.

Example 4
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material in Example 4 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 4 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression process in Example 4 is the same as the compression process in Example 1. In addition, the heating temperature in the compression process of Example 4 is 50 degreeC. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Example 4 is shown in FIG.

(Comparative Example 10)
In the method for inspecting the polymer particle material of Comparative Example 10, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Example 4. The measurement process of Comparative Example 10 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 10 is shown in FIG.

(Comparative Example 11)
In the inspection method for the polymer particle material of Comparative Example 11, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 10. The measurement process of Comparative Example 11 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 11 is shown in FIG.

(Comparative Example 12)
In the inspection method for the polymer particle material of Comparative Example 12, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 11. The measurement process of Comparative Example 12 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 12 is shown in FIG.

(Example 5)
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material of Example 5 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 5 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression step in Example 5 is the same as the compression step in Example 1 except that the heating temperature is 65 ° C. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of samples 1 to 4 measured in the measurement process of Example 5 is shown in FIG.

(Comparative Example 13)
In the method for inspecting the polymer particle material of Comparative Example 13, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Example 5. The measurement process of Comparative Example 13 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 13 is shown in FIG.

(Comparative Example 14)
In the inspection method for the polymer particle material of Comparative Example 14, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 13. The measurement process of Comparative Example 14 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 14 is shown in FIG.

(Comparative Example 15)
In the inspection method for the polymer particle material of Comparative Example 15, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 14. The measurement process of Comparative Example 15 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 15 is shown in FIG.

(Evaluation of cohesiveness 2)
The heating method in the compression process (hereinafter abbreviated as the compression temperature) differs in the method for inspecting the polymer granular materials of Examples 2 to 5. Specifically, the compression temperature in each example is Example 2 <Example 3 <Example 4 <Example 5. Moreover, as shown to FIGS. 7-10, the total load measured with the inspection method of the polymer granular material of Examples 2-5 is Example 2 <Example 3 <Example 4 <Example 5. Furthermore, as shown to FIGS. 7-10, the difference of the total load measured with the method of the Example and the total load measured with the method of the comparative example becomes large, so that compression temperature is high. From these results, it can be seen that the detection method of the polymer particle material of the present invention has higher detection sensitivity as the compression temperature is higher, and can evaluate the aggregation property of the polymer particles with high accuracy. In addition, when making compression temperature 50 degreeC or more (FIGS. 9-10), the total load measured in the Example is large compared with the case where compression temperature is made less than 50 degreeC (FIGS. 7-8), and The difference between the total load measured in the example and the total load measured in the comparative example becomes very large. Furthermore, as described above, by setting the compression temperature to a temperature lower than the melting temperature of the polymer particle material, the polymer particles can be trusted while avoiding the fixation of the polymer particles due to melting of the polymer particle material. It can be agglomerated highly. Therefore, it can be said that a preferable compression temperature in the method for inspecting a polymer granular material of the present invention is 50 ° C. or more below the melting temperature of the polymer granular material.

  Although not shown in the figure, the compression temperature is similarly applied to the case where the aggregation property of the polymer particles is evaluated based only on the rotational load and the case where the aggregation property of the polymer particles is evaluated based only on the insertion load. Is less than the melting temperature of the polymer particle material and 50 ° C. or more, the cohesiveness of the polymer particles can be evaluated with high accuracy.

(Example 6)
The same polymer particle material as that used in Example 1 was used as the polymer particle material used in the method for inspecting polymer particle material in Example 6. The samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting the polymer granular material of Example 6 are the same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 6 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression process in Example 6 is the same as the compression process in Example 1 except that the load applied to each sample is 15.3 g / cm ² (the mass of the load body 2 is 300 g). In addition, the heating temperature in the compression process of Example 6 is 50 degreeC. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Example 6 is shown in FIG.

(Comparative Example 16)
In the inspection method for the polymer particle material of Comparative Example 16, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 6. The measurement process of Comparative Example 16 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 16 is shown in FIG.

(Comparative Example 17)
In the inspection method for the polymer particle material of Comparative Example 17, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 16. The measurement process of Comparative Example 17 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 17 is shown in FIG.

(Comparative Example 18)
In the method for inspecting the polymer particle material in Comparative Example 18, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Comparative Example 17. The measurement process of Comparative Example 18 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 18 is shown in FIG.

(Example 7)
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material of Example 7 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 7 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression step in Example 7 is the same as the compression step in Example 1 except that the load applied to each sample is 20.4 g / cm ² (the mass of the load body 2 is 400 g). In addition, the heating temperature in the compression process of Example 7 is 50 degreeC. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Example 7 is shown in FIG.

(Comparative Example 19)
In the inspection method for the polymer particle material of Comparative Example 19, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 7. The measurement process of Comparative Example 19 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 19 is shown in FIG.

(Comparative Example 20)
In the method for inspecting the polymer particle material of Comparative Example 20, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Comparative Example 19. The measurement process of Comparative Example 20 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 20 is shown in FIG.

(Comparative Example 21)
In the inspection method for the polymer particle material of Comparative Example 21, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 20. The measurement process of Comparative Example 21 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 21 is shown in FIG.

(Example 8)
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material in Example 8 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the measurement process in Example 8 are the same as the preliminary process, the preparation process, and the measurement process in Example 1. The compression process in Example 8 is the same as the compression process in Example 1 except that the load applied to each sample is 50.9 g (the mass of the load body 2 is 1000 g). In addition, the heating temperature in the compression process of Example 8 is 50 degreeC. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of samples 1 to 4 measured in the measurement process of Example 8 is shown in FIG.

(Comparative Example 22)
In the method for inspecting the polymer particle material of Comparative Example 22, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the method for inspecting the polymer particle material in Example 8. The measurement process of Comparative Example 22 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 22 is shown in FIG.

(Comparative Example 23)
In the inspection method for the polymer particle material of Comparative Example 23, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 22. The measurement process of Comparative Example 23 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 23 is shown in FIG.

(Comparative Example 24)
In the inspection method for the polymer particle material of Comparative Example 24, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 24. The measurement process of Comparative Example 24 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 24 is shown in FIG.

(Evaluation of cohesiveness 3)
The methods for inspecting the polymer granular materials of Examples 6 to 8 differ in the load in the compression step (hereinafter abbreviated as the compression load). Specifically, the compressive load in each example is Example 6 <Example 7 <Example 8. Moreover, as shown to FIGS. 11-13, the total load measured with the test | inspection method of the polymeric granular material of Examples 6-8 is Example 6 <Example 7 <Example 8. FIG. Furthermore, as shown in FIGS. 11-13, the difference between the total load measured by the method of the example and the total load measured by the method of the comparative example increases as the compressive load increases. From these results, it can be seen that the detection method of the polymer particle material of the present invention increases the detection sensitivity as the compressive load increases, and can evaluate the aggregation property of the polymer particles with high accuracy. When the compressive load is set to 400 g or more (FIGS. 12 to 13), the total load measured in the example is larger than in the case where the compressive load is set to less than 400 g (FIG. 11). The difference between the measured total load and the total load measured in the comparative example becomes very large. Therefore, it can be said that a preferable compressive load in the method for inspecting a polymer granular material of the present invention is 400 g or more (20.4 g / cm ² or more). Furthermore, if the compressive load is less than 509 g / cm ² (the mass of the load body 2 is less than 10 kg), the polymer particle material does not adhere. Thus, compressive load if ^{20.4g / cm 2 ~509g / cm 2} , it can accurately evaluate the cohesiveness of the polymer granules.

Although not shown in the figure, the compression load is similarly applied to the case where the aggregation property of the polymer particles is evaluated based only on the rotational load and the case where the aggregation property of the polymer particles is evaluated based only on the insertion load. There if ^{20.4g / cm 2 ~509g / cm 2} , can accurately evaluate the cohesiveness of the polymer granules.

Example 9
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material in Example 9 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the compression process in the ninth embodiment are the same as the preliminary process, the preparation process, and the compression process in the first embodiment. The measurement process in Example 9 is the same as the measurement process in Example 1 except that the rotational speed of the probe is 2.0 rpm and the insertion speed is 26.4 mm / min. In addition, the heating temperature in the compression process of Example 9 is 50 degreeC, and the load (mass of the load body 2) added to each sample is 500 g. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Example 9 is shown in FIG.

(Comparative Example 25)
In the inspection method for the polymer particle material of Comparative Example 25, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 9. The measurement process of Comparative Example 25 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 25 is shown in FIG.

(Comparative Example 26)
In the method for inspecting the polymer particle material of Comparative Example 26, the insertion load and the rotational load of the polymer particle material are again measured after the measurement step in the method for inspecting the polymer particle material in Comparative Example 25. The measurement process of Comparative Example 26 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 26 is shown in FIG.

(Comparative Example 27)
In the inspection method for the polymer particle material of Comparative Example 27, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 26. The measurement process of Comparative Example 27 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 27 is shown in FIG.

(Example 10)
Samples (samples 1 to 4) whose cohesiveness was evaluated by the method for inspecting polymer granular material of Example 10 were used except that GS500 manufactured by Sanyo Chemical Industries, Ltd. was used as the polymer granular material. The same as Samples 1 to 4 in Example 1. The preliminary process, the preparation process, and the compression process in Example 10 are the same as the preliminary process, the preparation process, and the compression process in Example 1. The measurement process in Example 10 is the same as the measurement process in Example 1 except that the rotational speed of the probe is 119.4 rpm and the insertion speed is 1575.2 mm / min. In addition, the heating temperature in the compression process of Example 10 is 50 degreeC, and the load (mass of the load body 2) added to each sample is 500 g. Samples 1 to 4 after the preliminary process were subjected to a preparation process to a measurement process, and the cohesiveness was evaluated. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Example 10 is shown in FIG.

(Comparative Example 28)
In the inspection method for the polymer particle material of Comparative Example 28, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Example 10. The measurement process of Comparative Example 28 was performed in the same manner as the measurement process of Comparative Example 1. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 28 is shown in FIG.

(Comparative Example 29)
In the polymer particle material inspection method of Comparative Example 29, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the polymer particle material inspection method of Comparative Example 28. The measurement process of Comparative Example 29 was performed in the same manner as the measurement process of Comparative Example 2. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 29 is shown in FIG.

(Comparative Example 30)
In the inspection method for the polymer particle material of Comparative Example 30, the insertion load and the rotational load of the polymer particle material are measured again after the measurement step in the inspection method for the polymer particle material of Comparative Example 29. The measurement process of Comparative Example 30 was performed in the same manner as the measurement process of Comparative Example 3. A graph showing the total load of Samples 1 to 4 measured in the measurement process of Comparative Example 30 is shown in FIG.

(Evaluation of cohesiveness 4)
In the method for inspecting the polymer granular material of Examples 9 to 10, the rotational speed and insertion speed of the measuring element are different. However, as shown in FIGS. 14 to 15, the total load measured by the method for inspecting the polymer granular material of Examples 9 to 10 is sufficiently large, and the total load measured by the method of Examples 9 to 10 and The difference from the total load measured by the method of the corresponding comparative example is also sufficiently large. From these results, in the method for inspecting a polymer granular material of the present invention, if the rotational speed of the probe is 2.0 to 119.4 rpm and the insertion speed is in the range of 26.4 to 1575.4 mm / min, It can be seen that the detection sensitivity is sufficiently high, and the aggregation property of the polymer particles can be evaluated with high accuracy. In addition, although not shown in the drawing, when measuring the cohesiveness of the polymer particles based only on the rotational load and when evaluating the cohesiveness of the polymer particles based only on the insertion load, the measuring element is similarly applied. Can be evaluated with high accuracy if the rotational speed is 2.0 to 119.4 rpm and the insertion speed is 26.4 to 1575.4 mm / min.

2 is a perspective view schematically showing a measurement container used in Example 1. FIG. 2 is a perspective view schematically showing a measurement container used in Example 1. FIG. FIG. 3 is a perspective view schematically illustrating a compression process in Example 1. It is a graph showing the insertion load of the samples 1-5 measured at the measurement process of Example 1 and Comparative Examples 1-3. It is a graph showing the rotational load of the samples 1-5 measured at the measurement process of Example 1 and Comparative Examples 1-3. It is a graph showing the sum of the insertion load and rotation load of the samples 1-5 measured at the measurement process of Example 1 and Comparative Examples 1-3. It is a graph showing the sum of the insertion load and rotation load of samples 1-4 measured at the measurement process of Example 2 and Comparative Examples 4-6. It is a graph showing the sum of the insertion load and rotation load of samples 1-4 measured in the measurement process of Example 3 and Comparative Examples 7-9. It is a graph showing the sum of the insertion load and rotation load of the samples 1-4 measured at the measurement process of Example 4 and Comparative Examples 10-12. It is a graph showing the sum of the insertion load and rotation load of samples 1-4 measured in the measurement process of Example 5 and Comparative Examples 13-15. It is a graph showing the sum of the insertion load and rotation load of samples 1-4 measured in the measurement process of Example 6 and Comparative Examples 16-18. It is a graph showing the sum of the insertion load and rotation load of the samples 1-4 measured at the measurement process of Example 7 and Comparative Examples 19-21. It is a graph showing the sum of the insertion load and rotation load of the samples 1-4 measured at the measurement process of Example 8 and Comparative Examples 22-24. It is a graph showing the sum of the insertion load and rotation load of samples 1-4 measured at the measurement process of Example 9 and Comparative Examples 25-27. It is a graph showing the sum of the insertion load and rotation load of samples 1-4 measured in the measurement process of Example 10 and Comparative Examples 28-30.

Explanation of symbols

1: Measuring container 2: Load body

Claims (7)

A method for inspecting polymer granular material for powder slush molding,
A preparation step of placing the polymeric granular material comprising a plurality of polymer granules into the measuring container,
A compression step of compressing the polymer particle material by applying a load to the polymer particle material contained in the measurement container;
The polymer granular material after the compression step is attached to an inspection device having a measuring element in the state of the measurement container, and the measuring element is inserted into the polymer granular material while rotating the measuring element. A measuring step of measuring at least one of a load in the insertion direction applied to the child and a load in the rotational direction applied to the measuring member,
In the measurement step, without performing a conditioning process to make the particle size of the polymer particle material uniform by inserting it into the polymer particle material while rotating the probe backward before measurement,
A method for inspecting a polymer particle material, wherein the ease of aggregation of the polymer particles is evaluated based on the load measured in the measurement step.   The method for inspecting a polymer granular material according to claim 1, wherein in the measuring step, at least a load in a rotational direction applied to the measuring element is measured.   3. The method for inspecting a polymer granular material according to claim 1, wherein in the measuring step, both a load in a plugging direction applied to the measuring element and a load in a rotating direction applied to the measuring element are measured.   The method for inspecting a polymer particle material according to any one of claims 1 to 3, wherein, in the compression step, the polymer particle material is compressed while being heated at a temperature lower than a melting temperature thereof. The load applied to the polymeric granular material in the compression step, the inspection of the polymeric granular material according to any one of claims 1 to 4 is 20.4g / cm ₂ ~509g / cm ₂ Method.   The method for inspecting a polymer particle material according to any one of claims 1 to 5, wherein a heating temperature in the compression step is 50 ° C or more below a melting temperature of the polymer particle material.   The method for inspecting a polymer granular material according to any one of claims 1 to 6, wherein the inspection device is a powder rheometer.

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