An intelligent preparation process for high heat-resistant insulating composite tape

Abstract

The present application relates to the field of new material technology, and specifically to an intelligent preparation process for a high heat-resistant insulating composite tape, which process includes: obtaining raw materials for the adhesive layer and the reinforcing layer of the composite tape; internally kneading the raw materials for the reinforcing layer, and after taking them out of the pot, taking them out of the open mixer, and cutting them into strips for standby use; using an extruder to extrude the reinforcing layer strip; putting the polyolefin rubber composition, polyolefin plastic composition, processing aid, and filler in the raw materials for the adhesive layer into the internal mixer to prepare the base glue; adding the base glue and the tackifying aid to the kneading machine in turn, vacuuming and kneading, and preparing the adhesive glue for standby use; using an extruder to extrude the adhesive layer, and laminating it with the already extruded reinforcing layer strip, and preparing the semi-finished composite insulating tape strip through the machine rolling and laminating process; performing irradiation cross-linking treatment to obtain the composite insulating tape. The present application aims to adjust the radiation dose and improve the production quality of the composite insulating tape.

Description

Technical Field

[0001] The present application relates to the field of new material technology, and in particular to an intelligent preparation process for a high heat-resistant insulating composite tape. Background Art

[0002] With the continuous development of emerging technologies, outdoor electronic products are evolving towards miniaturization, lightness and high performance. Due to the complexity and variability of the outdoor environment, such products usually need to cope with harsh conditions such as temperature and humidity. In order to ensure that electronic equipment can operate stably in harsh environments, composite tapes with high heat resistance and excellent insulation properties have come into being. These composite tapes play a vital role in ensuring the reliability and durability of outdoor electronic products. High-performance high-heat-resistant insulation composite tapes can provide effective heat dissipation solutions for outdoor electronic products on the basis of good electrical insulation, promoting the progress of new technology industries.

[0003] Modifying the reinforcing layer of the composite tape by radiation cross-linking can improve the weather resistance and aging resistance of the composite tape. However, in the radiation cross-linking process of the composite tape, the radiation dose of the semi-finished composite insulating tape needs to be strictly controlled. When the radiation dose of the semi-finished composite insulating tape is too small, the polymer in the tape may not form a sufficient cross-linking network, resulting in a decrease in the thermal stability of the tape; when the radiation dose of the semi-finished composite insulating tape is too large, the polymer in the tape may be excessively cross-linked, causing the tape to become hard and brittle, reducing its flexibility and impact resistance, and may also affect the bonding properties of the tape. Summary of the invention

[0004] In view of the above, it is necessary to provide an intelligent preparation process for a high heat-resistant insulating composite tape, adjust the irradiation dose of the semi-finished composite insulating tape, and improve the production quality of the finished composite insulating tape.

[0005] An embodiment of the present application provides an intelligent preparation process for a high heat-resistant insulating composite tape, the process comprising:

[0006] The raw materials of the composite tape adhesive layer and the composite tape reinforcement layer are: polyolefin rubber composition, polyolefin plastic composition, filler, tackifier, processing aid, antioxidant, antioxidant, operating oil, radiation crosslinking agent;

[0007] The raw materials of the reinforcement layer are mixed and then taken out of the pot and the sheets are produced on the mixing mill;

[0008] Extruding a reinforcement layer tape by an extruder;

[0009] Putting the polyolefin rubber composition, the polyolefin plastic composition, the processing aid and the filler in the adhesive layer raw material into an internal mixer to obtain a base rubber;

[0010] Add the base glue and the tackifier to the kneader in sequence, and knead them under vacuum to obtain the adhesive glue;

[0011] An extruder is used to extrude the adhesive layer, and the adhesive layer is laminated to the reinforcing layer tape, and a semi-finished composite insulating tape tape is prepared through a machine rolling and laminating process;

[0012] During the radiation cross-linking treatment of the semi-finished composite insulating tape, the radiation dose is adjusted to obtain the composite insulating tape; the adjustment process is as follows:

[0013] 1): Obtain the radiation dose data of each radiation area of ​​the semi-finished composite insulating tape at each moment;

[0014] 2): Set the irradiation interval; compare the radiation doses of each radiation area at adjacent moments in each irradiation interval, and obtain the radiation enhancement factor of each radiation area in each irradiation interval in combination with the overall change characteristics of the radiation dose;

[0015] 3): According to the difference distribution of radiation dose data between each radiation area and the radiation source, and between each radiation area and other radiation areas in each irradiation interval, combined with the radiation enhancement factor, the sufficient radiation distance of each radiation area in each irradiation interval is obtained;

[0016] 4): Multiple irradiation intervals are grouped into adjustment intervals; according to the distribution of the sufficient radiation distance of all irradiation areas in each adjustment interval, combined with a filtering algorithm, the irradiation cross-linking degree of each adjustment interval is obtained;

[0017] 5): If the radiation cross-linking degree of the corresponding adjustment interval at the current moment is less than the preset radiation cross-linking threshold, the radiation dose is increased by a preset amount.

[0018] Among them, the raw materials and weight portions of the bonding layer of the composite tape are: 120 parts of a polyolefin rubber composition, 20 to 40 parts of a polyolefin plastic composition, 100 to 230 parts of a filler, 120 to 330 parts of a tackifier, 2 to 5 parts of a processing aid, 3 to 10 parts of an antioxidant, and 3 to 10 parts of an antioxidant; the raw materials and weight portions of the reinforcing layer of the composite tape are: 120 to 190 parts of a polyolefin rubber composition, 50 to 80 parts of a polyolefin plastic composition, 100 to 230 parts of a filler, 8 to 28 parts of a tackifier, 3 to 10 parts of a processing aid, 15 to 25 parts of an operating oil, 3 to 10 parts of a radiation crosslinking agent, 3 to 10 parts of an antioxidant, and 3 to 10 parts of an antioxidant.

[0019] Among them, the reinforcing layer polyolefin rubber composition is one of EPDM rubber, nitrile rubber, and chloroprene rubber; the polyolefin plastic composition is one of polyolefin elastomer, high-density polyethylene plastic, and styrene-isoprene-styrene block copolymer; the irradiation crosslinking agent is triallyl isocyanurate; the bonding layer polyolefin rubber composition is one of EPDM rubber, butyl rubber, and polyisobutylene rubber; the viscosity-increasing aid is one or both of polybutene and polyisobutylene; the processing aid is one or both of stearic acid and zinc stearate; the operating oil is one of white oil, paraffin oil 300, and paraffin oil 25110; the filler is one of calcium carbonate, clay, and kaolin; the antioxidant is one or both of antioxidant MB and antioxidant RD.

[0020] The mixing time is 30 to 50 minutes, and the mixture is taken out of the pot at 130 to 150° C.

[0021] Wherein, the temperature of the extruded reinforcement layer strip is 130-150°C.

[0022] The specific operation of putting the mixture into the internal mixer is to internally mix the mixture until the temperature reaches 130-150° C. and then remove the mixture from the internal mixer.

[0023] Wherein, the temperature of the extrusion bonding layer is 120-150°C.

[0024] The specific steps of obtaining the radiation enhancement factor of each radiation area in each radiation interval include:

[0025] Obtain the moments when all radiation doses of each radiation area in each irradiation interval are increased compared with adjacent moments, record them as radiation increase moments, analyze the discreteness of the radiation increase moments, determine the radiation increase stability of each radiation area in each irradiation interval, and determine the radiation increase ratio sequence of each irradiation area in each irradiation interval according to the differences in radiation doses between all radiation increase moments and adjacent moments; use the forward fusion results of all elements in the radiation increase ratio sequence as the radiation increase degree of each radiation area in each irradiation interval; and use the forward fusion of the radiation increase degree and the radiation increase stability as the radiation increase factor.

[0026] Wherein, obtaining the sufficient radiation distance of each radiation area in each irradiation interval includes:

[0027] Determine the radiation dose rate stability of each radiation zone in each irradiation interval according to the degree of dispersion of the difference between the radiation dose at all times in each irradiation interval of each radiation zone and the radiation dose of the radiation source; determine the radiation enhancement difference of any radiation zone in each irradiation interval according to the distance measurement between the radiation enhancement ratio sequence of any radiation zone and the other radiation zones in each irradiation interval; use the inverse proportional mapping result of the radiation dose rate stability and the radiation enhancement difference of any radiation zone in each irradiation interval as the radiation consistency factor of any radiation zone in each irradiation interval;

[0028] The irradiation enhancement factor and the irradiation consistency factor are forwardly fused to determine the radiation sufficiency coefficient of each irradiation area in each irradiation interval; the inverse proportional relationship between the radiation sufficiency coefficient of each irradiation area in each irradiation interval and the radiation distance is used as the radiation sufficiency distance of each irradiation area in each irradiation interval.

[0029] Wherein, the method for obtaining the irradiation crosslinking degree in each adjustment interval is:

[0030] The sequence of radiation sufficient distances of all irradiation intervals in each adjustment interval of each radiation area is recorded as the radiation sufficient distance sequence of each radiation area in each adjustment interval, and the radiation sufficient prediction distance sequence of each adjustment interval is obtained by using a filtering algorithm;

[0031] The radiation variation factor of each adjustment interval is determined based on the inverse proportional mapping of the similarity measure of the radiation sufficient distance sequence of all two-way combinations of radiation areas in each adjustment interval; the radiation linear response intensity of each adjustment interval is determined based on the difference between the radiation sufficient distance sequence and the radiation sufficient predicted distance sequence of all radiation areas in each adjustment interval; the inverse proportional mapping result of the radiation variation factor of each adjustment interval is forward fused with the radiation linear response intensity to obtain the radiation cross-linking degree of each adjustment interval.

[0032] This application has at least the following beneficial effects:

[0033] The present application obtains radiation metrology data, analyzes the radiation dose enhancement characteristics and the consistency of the radiation characteristics of the radiation area by setting the irradiation interval, constructs the radiation enhancement factor, and comprehensively considers the similarity of the irradiation conditions between different radiation areas and the enhancement intensity of the corresponding radiation dose of the radiation area; constructs the sufficient radiation distance to more accurately reflect the sufficient degree of radiation received by the local composite insulating tape semi-finished strip; obtains the radiation cross-linking degree according to the radiation variation characteristics and the radiation linear response characteristics between the radiation areas in the adjustment interval, and adds the consideration of the radiation linear response intensity on the basis of analyzing the differences between the corresponding sufficient radiation distances of all radiation areas, which more accurately reflects the sufficient degree of radiation cross-linking of the composite insulating tape strip in the adjustment interval, and adjusts the radiation dose of the radiation source based on this, so as to prevent the radiation dose from being too large or too small during the radiation cross-linking process, affecting the thermal stability and related properties of the composite insulating tape, and improving the quality of the heat-resistant insulating composite tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of an intelligent preparation process of a high heat-resistant insulating composite tape provided in this application;

[0035] Figure 2 Schematic diagram of radiation dose data collection provided for this application;

[0036] Figure 3 A flow chart for adjusting the radiation dose of a radiation source provided for this application;

[0037] Figure 4 This is a graph of the test results of tensile strength and elongation at break of the composite insulating tape provided in this application. DETAILED DESCRIPTION

[0038] In the description of the embodiments of the present application, words such as "exemplary", "or", "for example" and the like are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "or", "for example" and the like is intended to present related concepts in a concrete manner.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the present application. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0040] It should also be noted that the terms "first" and "second" in this application and its drawings are used to distinguish similar objects, rather than to describe a specific order or sequence. The method disclosed in the embodiments of the present application or the method shown in the flow chart includes one or more steps for implementing the method. Without departing from the scope of protection of this application, the execution order of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0041] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0042] The present application embodiment first proposes an intelligent preparation process for a high heat-resistant insulating composite tape, which is applied to the technical field of new materials. Figure 1 , the process comprises:

[0043] Step 1: Obtain raw materials for the composite tape adhesive layer and the composite tape reinforcement layer.

[0044] In Example 1 of the present application, the raw materials and weight parts of the reinforcing layer of the composite tape are: 120 parts of a polyolefin rubber composition, 50 parts of a polyolefin plastic composition, 100 parts of a filler, 8 parts of a tackifier, 3 parts of a processing aid, 15 parts of an operating oil, 3 parts of an irradiation crosslinking agent, 3 parts of an antioxidant, and 3 parts of an antioxidant; the raw materials and weight parts of the bonding layer of the composite tape are: 120 parts of a polyolefin rubber composition, 20 parts of a polyolefin plastic composition, 100 parts of a filler, 120 parts of a tackifier, 2 parts of a processing aid, 3 parts of an antioxidant, and 3 parts of an antioxidant; wherein the reinforcing layer polyolefin rubber composition is ethylene propylene diene monomer rubber; the polyolefin plastic composition is a polyolefin elastomer; the irradiation crosslinking agent is triallyl isocyanurate; the bonding layer polyolefin rubber composition is ethylene propylene diene monomer rubber; the tackifier is polybutene; the processing aid is stearic acid; the operating oil is white oil; the filler is calcium carbonate; and the antioxidant is antioxidant MB.

[0045] In Example 2 of the present application, the raw materials and weight parts of the reinforcing layer of the composite tape are: 170 parts of a polyolefin rubber composition, 60 parts of a polyolefin plastic composition, 160 parts of a filler, 18 parts of a tackifier, 7 parts of a processing aid, 22 parts of an operating oil, 9 parts of an irradiation crosslinking agent, 6 parts of an antioxidant, and 8 parts of an antioxidant; the raw materials and weight parts of the bonding layer of the composite tape are: 120 parts of a polyolefin rubber composition, 22 parts of a polyolefin plastic composition, 190 parts of a filler, 270 parts of a tackifier, 4 parts of a processing aid, 7 parts of an antioxidant, and 6 parts of an antioxidant; wherein the reinforcing layer polyolefin rubber composition is nitrile rubber; the polyolefin plastic composition is a high-density polyethylene plastic; the irradiation crosslinking agent is triallyl isocyanurate; the bonding layer polyolefin rubber composition is butyl rubber; the tackifier is polyisobutylene; the processing aid is zinc stearate; the operating oil is paraffin oil 300; the filler is clay; and the antioxidant is antioxidant RD.

[0046] In Example 3 of the present application, the raw materials and weight parts of the composite tape reinforcement layer are: 190 parts of a polyolefin rubber composition, 80 parts of a polyolefin plastic composition, 230 parts of a filler, 28 parts of a tackifier, 10 parts of a processing aid, 25 parts of an operating oil, 10 parts of an irradiation crosslinking agent, 10 parts of an antioxidant, and 10 parts of an antioxidant; The raw materials and weight parts of the composite tape reinforcement layer are: 190 parts of a polyolefin rubber composition, 80 parts of a polyolefin plastic composition, 230 parts of a filler, 28 parts of a tackifier, 10 parts of a processing aid, 25 parts of an operating oil, 10 parts of an irradiation crosslinking agent, 10 parts of an antioxidant, and 10 parts of an antioxidant. 25 parts of oil, 10 parts of radiation cross-linking agent, 10 parts of antioxidant, and 10 parts of antioxidant; wherein the reinforcing layer polyolefin rubber composition is chloroprene rubber; the polyolefin plastic composition is styrene-isoprene-styrene block copolymer; the radiation cross-linking agent is triallyl isocyanurate; the bonding layer polyolefin rubber composition is polyisobutylene rubber; the viscosity-increasing aid is polybutene and polyisobutylene; the processing aid is stearic acid and zinc stearate; the operating oil is paraffin oil 25110; the filler is kaolin; and the antioxidants are antioxidant MB and antioxidant RD.

[0047] Step 2: knead the raw materials of the reinforcement layer, take them out of the pot and put them into sheets on the mixer, cut them into strips for later use; the mixer is X(S)-1.5L type; the implementer can select a suitable mixer according to the actual situation.

[0048] In Example 1 of the present application, the reinforcement layer raw material is fed into an internal mixer for internal mixing for 30 minutes, and is taken out of the mixer at 130°C.

[0049] In Example 2 of the present application, the reinforcement layer raw material is sent to the internal mixer for internal mixing for 39 minutes, and is taken out of the mixer at 143°C.

[0050] In Example 3 of the present application, the reinforcement layer raw material is fed into an internal mixer for internal mixing for 50 minutes, and is taken out of the mixer at 150°C.

[0051] Step 3: Use an extruder to extrude the reinforcement layer strip and roll it up for later use.

[0052] In Example 1 of the present application, the temperature of the extruded reinforcement layer tape is 130°C.

[0053] In Example 2 of the present application, the temperature of the extruded reinforcement layer tape is 145°C.

[0054] In Example 3 of the present application, the temperature of the extruded reinforcement layer tape is 150°C.

[0055] Step 4: putting the polyolefin rubber composition, the polyolefin plastic composition, the processing aid and the filler in the raw material components of the bonding layer into an internal mixer to obtain a base rubber;

[0056] In Example 1 of the present application, the mixture was placed in a banbury mixer and kneaded to 130° C. before being removed from the pan.

[0057] In Example 2 of the present application, the mixture was placed in a banbury mixer and kneaded to 138° C. before being removed from the pan.

[0058] In Example 3 of the present application, the mixture was placed in a banbury mixer and kneaded to 150° C. before being removed from the pan.

[0059] Step 5: Add the base glue and the tackifier into the kneading machine in sequence, evacuate the machine and knead at 130-150° C. to obtain the adhesive glue.

[0060] Step six: use an extruder to extrude the adhesive layer, and bond the adhesive layer to the extruded reinforcement layer strip. After machine rolling and bonding processes, a semi-finished composite insulating tape strip is obtained.

[0061] In Example 1 of the present application, the temperature of the extruded bonding layer is 120°C.

[0062] In Example 2 of the present application, the temperature of the extruded bonding layer is 130°C.

[0063] In Example 3 of the present application, the temperature of the extruded bonding layer is 150°C.

[0064] Step seven: During the irradiation cross-linking treatment of the semi-finished composite insulating tape, the irradiation dose is adjusted to obtain a composite insulating tape; in some embodiments of the present application, a C0-60 gamma ray radiation treatment device is used for irradiation, and the irradiation dose is 0 to 30 kGy.

[0065] The process of adjusting the radiation dose is as follows:

[0066] 1): Obtain the radiation dose data of each radiation area of ​​the semi-finished composite insulating tape at each moment.

[0067] Set the initial irradiation dose; use multiple PN junction semiconductor detectors to obtain the radiation dose data of each radiation area of ​​the semi-finished composite insulating tape strip during the irradiation cross-linking process; each radiation area is a monitoring range centered on the semiconductor detector, and the distance between each semiconductor detector and the radiation source is obtained and recorded as the radiation distance of each radiation area; in order to prevent the radiation dose data of the semi-finished composite insulating tape strip obtained by the semiconductor detector from being missing, the median filling method is used to fill the radiation dose data collected by each semiconductor detector. Since the median filling method is a well-known technology, the specific acquisition process will not be described in detail. In addition, the implementer can also choose other data filling methods, and this application does not limit this.

[0068] In some embodiments of the present application, the initial irradiation dose is set to 5 kGy, the data collection interval of the semiconductor detector is set to 0.5S, and the number of semiconductor detectors is set to 49.

[0069] Among them, the radiation dose data collection schematic diagram is as follows: Figure 2 As shown; a is the radiation source, b is the PN junction semiconductor detector, and c is the radiation area corresponding to a PN junction semiconductor detector.

[0070] 2): Set the irradiation interval; compare the radiation doses of each radiation area at adjacent moments in each irradiation interval, and combine the overall change characteristics of the radiation dose to obtain the radiation enhancement factor of each radiation area in each irradiation interval.

[0071] During the radiation cross-linking process of the semi-finished composite insulating tape, when the radiation dose is more sufficient and appropriate, the polymer in the semi-finished composite insulating tape can form a more sufficient cross-linking network, and the performance of the prepared insulating composite tape is better, which is specifically manifested in that: the consistency between the radiation dose data of the semi-finished composite insulating tape at different positions in the radiation field is more significant, and the stability of the dose rate during the irradiation process is stronger; at the same time, the radiation dose linear response of the semi-finished composite insulating tape is stronger within a certain time range.

[0072] Set the irradiation interval; in some embodiments of the present application, 1 minute is used as an irradiation interval; implementers can adjust it according to actual conditions.

[0073] Obtain the moments when all radiation doses of each radiation area in each irradiation interval are increased compared with adjacent moments, record them as radiation increase moments, analyze the discreteness of the radiation increase moments, determine the radiation increase stability of each radiation area in each irradiation interval, and determine the radiation increase ratio sequence of each irradiation area in each irradiation interval according to the differences in radiation doses between all radiation increase moments and adjacent moments; use the forward fusion results of all elements in the radiation increase ratio sequence as the radiation increase degree of each radiation area in each irradiation interval; use the forward fusion of the radiation increase degree and the radiation increase stability as the radiation increase factor of each radiation area in each irradiation interval.

[0074] It should be noted that the difference represents the numerical difference between variables, specifically: difference, absolute value of difference, ratio, etc.; forward fusion is a fusion method such as addition and multiplication between data; the degree of dispersion describes the dispersion of the data, that is, the distribution of data points relative to the center of the data set. Commonly used dispersion degree measures include variance, standard deviation, range, interquartile range, etc.; this application does not impose any restrictions on this.

[0075] In some embodiments of the present application, for each irradiation interval, each moment when the radiation dose in the irradiation interval is less than the radiation dose at the next adjacent moment is taken as a radiation boost moment, and the ratio of the radiation dose at the next adjacent moment of each radiation boost moment to the radiation dose at the radiation boost moment is recorded as the radiation boost ratio at each radiation boost moment; a sequence composed of all corresponding radiation boost ratios of each radiation area in each irradiation interval in a chronological order of the radiation boost moments is taken as a radiation boost ratio sequence of each radiation area in each irradiation interval; all radiation boost moments of each radiation area in each irradiation interval are combined into a radiation boost moment sequence of each radiation area in each irradiation interval in a chronological order.

[0076] Furthermore, the cumulative result of all data in the radiation enhancement ratio sequence of each radiation zone in each irradiation interval is taken as the radiation enhancement degree of each radiation zone in each irradiation interval; the radiation enhancement stability of each radiation zone in each irradiation interval is determined by the interquartile range of the radiation enhancement moment sequence of each radiation zone in each irradiation interval; the radiation enhancement factor of each radiation zone in each irradiation interval is specifically the product of the radiation enhancement degree and the radiation enhancement stability of each radiation zone in each irradiation interval.

[0077] It should be understood that, when the radiation dose enhancement effect of the semi-finished composite insulating tape at the location of the radiation area during the radiation cross-linking treatment is more significant, the radiation dose data acquired by the semiconductor detector increases more significantly with time, the radiation enhancement factor is larger, that is, the radiation enhancement degree is larger, the radiation enhancement stability is stronger, and further, the cumulative result of all data in the radiation enhancement ratio sequence corresponding to the radiation area is larger; the more discrete the distribution of the radiation enhancement moment in the radiation area within the irradiation interval, the larger the interquartile range of the radiation enhancement moment sequence.

[0078] 3): According to the difference distribution of radiation dose data between each radiation area and the radiation source, and between each radiation area and other radiation areas in each irradiation interval, combined with the radiation enhancement factor, the sufficient radiation distance of each radiation area in each irradiation interval is obtained.

[0079] The radiation dose rate stability of each radiation zone in each irradiation interval is determined according to the degree of discreteness of the difference between the radiation dose at all moments in each irradiation interval of each radiation zone and the radiation dose of the radiation source; the radiation boost difference of any radiation zone in each irradiation interval is determined according to the distance measurement between the radiation boost ratio sequences of any radiation zone and the other radiation zones in each irradiation interval; the inverse proportional mapping result of the radiation dose rate stability and the radiation boost difference of any radiation zone in each irradiation interval is used as the radiation consistency factor of any radiation zone in each irradiation interval.

[0080] It should be noted that the distance metric between sequences is a method for measuring the similarity or difference of sequences, specifically including: Euclidean distance, Manhattan distance, DTW distance, etc., which is not limited in this application.

[0081] In some embodiments of the present application, the radiation dose of the radiation source is recorded as the radiation source dose, and the ratio of the radiation dose at all times in each irradiation interval of each radiation zone to the radiation source dose is used to form a radiation dose rate sequence of each radiation zone in each irradiation interval; the cumulative result of the DTW distance between the radiation increase ratio sequence of any radiation zone and all other radiation zones in each irradiation interval is obtained as the radiation increase difference of any radiation zone in each irradiation interval; the cumulative result of the absolute value of the difference between all data in the radiation dose rate sequence of any radiation zone in each irradiation interval is calculated, and the inverse of the cumulative result is taken as the radiation dose rate stability of any radiation zone in each irradiation interval.

[0082] The ratio of the radiation dose rate stability to the radiation enhancement difference of each radiation area in each irradiation interval is used as the radiation consistency factor of each radiation area in each irradiation interval; it should be noted that when the radiation enhancement difference is 0, resulting in the denominator being 0 and unable to be calculated, the ratio of the radiation dose rate stability to the adjustment parameter is used as the radiation consistency factor, and the adjustment parameter value is 1.

[0083] It should be understood that when the irradiation conditions of the semi-finished composite insulating tape at the location of the radiation area during the irradiation cross-linking treatment process are more similar to those of the other radiation areas, the repeatability between the radiation dose change conditions corresponding to different radiation areas is stronger, that is, the consistency of the radiation dose increase conditions between different radiation areas is more significant, the radiation dose rate stability is stronger, the radiation consistency factor is larger, that is, the radiation increase difference is smaller, the radiation dose rate stability is stronger, and further, the DTW distance between the radiation area and the corresponding radiation increase ratio sequence of all other radiation areas in the irradiation interval is smaller; the cumulative difference between all data in the radiation dose rate sequence corresponding to the radiation area is smaller.

[0084] The irradiation enhancement factor and the irradiation consistency factor are forwardly fused to determine the radiation sufficiency coefficient of each irradiation area in each irradiation interval; the inverse proportional relationship between the radiation sufficiency coefficient of each irradiation area in each irradiation interval and the radiation distance is used as the radiation sufficiency distance of each irradiation area in each irradiation interval.

[0085] In Examples 1 and 3 of the present application, the radiation sufficiency coefficient of each radiation zone in each irradiation interval is the product of the radiation enhancement factor and the radiation consistency factor of each radiation zone in each irradiation interval; the ratio of the radiation sufficiency coefficient of each radiation zone in each irradiation interval to the corresponding radiation distance is taken as the radiation sufficiency distance of each radiation zone in the irradiation interval.

[0086] In Example 2 of the present application, the radiation sufficiency coefficient of each radiation zone in each irradiation interval is the sum of the radiation enhancement factor and the radiation consistency factor of each radiation zone in each irradiation interval; the ratio of the radiation sufficiency coefficient of each radiation zone in each irradiation interval to the corresponding radiation distance is taken as the radiation sufficiency distance of each radiation interval in each irradiation interval.

[0087] It should be understood that when the radiation dose received by the semi-finished composite insulating tape at the radiation area is more sufficient during the radiation cross-linking treatment, the radiation dose enhancement effect of the radiation area is more significant, the stronger the similarity between the radiation conditions of each radiation area in each radiation interval and the other radiation areas, the greater the radiation sufficiency coefficient, that is, the greater the radiation enhancement factor, and the greater the radiation consistency factor.

[0088] 4): Multiple irradiation intervals are grouped into adjustment intervals; according to the distribution of the sufficient radiation distance of all irradiation areas in each adjustment interval, combined with a filtering algorithm, the irradiation cross-linking degree of each adjustment interval is obtained.

[0089] Set the adjustment interval; record the sequence of radiation sufficient distances of all irradiation intervals in each adjustment interval of each radiation area as the radiation sufficient distance sequence of each radiation area in each adjustment interval, and use the filtering algorithm to obtain the radiation sufficient prediction distance sequence of each adjustment interval

[0090] In some embodiments of the present application, the adjustment interval includes 60 irradiation intervals, that is, 1h is taken as an adjustment interval, and the radiation sufficient distances of all irradiation intervals in each adjustment interval of each radiation area are sequenced according to the irradiation interval time sequence as the radiation sufficient distance sequence of each radiation area in each adjustment interval. The radiation sufficient distance sequence of each adjustment interval of each radiation area is used as input, and the EMA (Exponential Moving Average) exponential moving average algorithm is used to obtain the radiation sufficient predicted distance sequence of each adjustment interval of each radiation area. Since the EMA exponential moving average algorithm is a well-known technology, the specific acquisition process will not be described in detail; the implementer can select a suitable filtering method to predict the sequence according to the actual situation, and the present application does not limit this.

[0091] It should be understood that the elements in the radiation sufficient prediction distance sequence of each adjustment interval of each radiation region correspond one-to-one to the irradiation intervals included in each adjustment interval.

[0092] The radiation variation factor of each adjustment interval is determined based on the inverse proportional mapping of the similarity measure of the radiation sufficient distance sequence of all two-way combinations of radiation areas in each adjustment interval; the radiation linear response intensity of each adjustment interval is determined based on the difference between the radiation sufficient distance sequence and the radiation sufficient predicted distance sequence of all radiation areas in each adjustment interval; the inverse proportional mapping result of the radiation variation factor of each adjustment interval is forward fused with the radiation linear response intensity to obtain the radiation cross-linking degree of each adjustment interval.

[0093] In some embodiments of the present application, the Jaccard similarity coefficient between the radiation sufficient distance sequences of any two radiation areas in each adjustment interval is calculated; the reciprocal of the cumulative result of the Jaccard similarity coefficients of all any two radiation areas in each adjustment interval is used as the radiation variation factor of the adjustment interval; the sum of the absolute values ​​of the differences between the radiation sufficient distance sequence of each radiation area in each adjustment interval and the radiation sufficient predicted distance sequence of all corresponding elements is calculated, and the sum of all radiation areas in each adjustment interval is added and then the reciprocal is calculated to obtain the radiation linear intensity of each adjustment interval. Wherein, in the process of calculating the reciprocal, in order to avoid the situation where the denominator is zero, it is necessary to add a preset value to the denominator, and the preset value is 1. The radiation cross-linking degree of each adjustment interval is the normalized result of the ratio of the radiation linear response intensity to the radiation variation factor of each adjustment interval.

[0094] When the degree of radiation cross-linking of the semi-finished composite insulating tape within the time range included in the adjustment interval is more sufficient and appropriate, the radiation variability between all radiation areas under the adjustment interval is weaker, the difference between the sufficient radiation distance of all radiation areas corresponding to the entire radiation interval and the sufficient radiation predicted distance is smaller, the radiation cross-linking intensity is greater, that is, the radiation variation factor is smaller, and the radiation linear response intensity is greater.

[0095] 5): If the radiation cross-linking degree of the corresponding adjustment interval at the current moment is less than the preset radiation cross-linking threshold, the radiation dose is increased by a preset amount.

[0096] When the radiation cross-linking degree obtained in real time is greater than or equal to the preset radiation cross-linking threshold, it is determined that the radiation sufficiency of the semi-finished composite insulating tape strip meets the preparation requirements, and there is no need to adjust the radiation dose of the radiation source; conversely, when the radiation cross-linking degree obtained in real time is less than the preset radiation cross-linking threshold, it is determined that the radiation sufficiency of the semi-finished composite insulating tape strip does not meet the preparation requirements, and a preset amount of radiation measurement is increased.

[0097] It should be noted that the value range of the radiation cross-linking threshold is [0,1]. The larger the radiation cross-linking threshold, the stricter the radiation cross-linking treatment requirements for the semi-finished composite insulating tape strip. In this application, the radiation cross-linking threshold is set to 0.6, and the preset amount is 5kGy. The implementer can set the radiation cross-linking threshold and the radiation dose for each adjustment according to actual conditions.

[0098] Among them, the flow chart for adjusting the radiation dose of the radiation source is as follows: Figure 3 shown.

[0099] At this point, the radiation source dose can be adjusted according to the above method to prepare a composite insulating tape with better performance. The composite insulating tape is rolled up and its related properties are tested. The test results are as follows:

[0100]

[0101]

[0102] Among them, the test results of tensile strength and elongation at break of composite insulating tape are shown in the figure below. Figure 4 As shown; Figure 4 The middle abscissa is the radiation dose of the radiation source (kGy), the left ordinate is the tensile strength (MPa), and the right ordinate is the elongation at break (%).

[0103] At this point, an intelligent preparation process for a high heat-resistant insulating composite tape can be realized through the above method.

[0104] The embodiment of the present application provides an intelligent preparation process for a highly heat-resistant insulating composite tape, including: obtaining radiation metering data, analyzing the radiation dose enhancement characteristics and the consistency of the radiation characteristics of the radiation area by setting an irradiation interval, constructing a radiation enhancement factor, and comprehensively considering the similarity of the irradiation conditions between different radiation areas and the enhancement intensity of the corresponding radiation dose of the radiation area; constructing a sufficient radiation distance to more accurately reflect the sufficient degree of radiation received by the semi-finished strip of the local composite insulating tape; obtaining the radiation cross-linking degree according to the radiation variation characteristics and the radiation linear response characteristics between the radiation areas within the adjustment interval, adding the consideration of the radiation linear response intensity on the basis of analyzing the differences between the corresponding sufficient radiation distances of all radiation areas, more accurately reflecting the sufficient degree of radiation cross-linking of the composite insulating tape strip within the adjustment interval, and adjusting the radiation dose of the radiation source based on this, preventing the radiation dose from being too large or too small during the radiation cross-linking process from affecting the thermal stability and related properties of the composite insulating tape, and improving the quality of the heat-resistant insulating composite tape.

[0105] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An intelligent preparation process for a high heat-resistant insulating composite tape, characterized in that: The process includes: The raw materials of the composite tape adhesive layer and the composite tape reinforcement layer are: polyolefin rubber composition, polyolefin plastic composition, filler, tackifier, processing aid, antioxidant, antioxidant, operating oil, radiation crosslinking agent; The raw materials of the reinforcement layer are mixed and then taken out of the pot and the sheets are produced on the mixing mill; Extruding a reinforcement layer tape by an extruder; Putting the polyolefin rubber composition, the polyolefin plastic composition, the processing aid and the filler in the adhesive layer raw material into an internal mixer to obtain a base rubber; Add the base glue and the tackifier to the kneader in sequence, and knead them under vacuum to obtain the adhesive glue; An extruder is used to extrude the adhesive layer, and the adhesive layer is laminated to the reinforcing layer tape, and a semi-finished composite insulating tape tape is prepared through a machine rolling and laminating process; During the radiation cross-linking treatment of the semi-finished composite insulating tape, the radiation dose is adjusted to obtain the composite insulating tape; the adjustment process is as follows: 1): Obtain the radiation dose data of each radiation area of ​​the semi-finished composite insulating tape at each moment; 2): Set the irradiation interval; compare the radiation doses of each radiation area at adjacent moments in each irradiation interval, and combine the overall change characteristics of the radiation dose to obtain the radiation enhancement factor of each radiation area in each irradiation interval; 3): According to the difference distribution of radiation dose data between each radiation area and the radiation source, and between each radiation area and other radiation areas in each irradiation interval, combined with the radiation enhancement factor, the sufficient radiation distance of each radiation area in each irradiation interval is obtained; 4): Multiple irradiation intervals are grouped into adjustment intervals; according to the distribution of the sufficient radiation distance of all irradiation areas in each adjustment interval, combined with a filtering algorithm, the irradiation cross-linking degree of each adjustment interval is obtained; 5): If the radiation cross-linking degree of the corresponding adjustment interval at the current moment is less than the preset radiation cross-linking threshold, the radiation dose is increased by a preset amount; The specific steps of obtaining the radiation enhancement factor of each radiation area in each radiation interval include: Obtain the moment when all radiation doses of each radiation area in each irradiation interval are increased compared with the adjacent moments, recorded as the radiation increase moment, analyze the discrete degree of the radiation increase moment, determine the radiation increase stability of each radiation area in each irradiation interval, and determine the radiation increase ratio sequence of each irradiation area in each irradiation interval according to the difference in radiation doses between all radiation increase moments and adjacent moments; use the forward fusion result of all elements in the radiation increase ratio sequence as the radiation increase degree of each radiation area in each irradiation interval; use the forward fusion of the radiation increase degree and the radiation increase stability as the radiation increase factor; The obtaining of the sufficient radiation distance of each radiation area in each irradiation interval includes: Determine the radiation dose rate stability of each radiation zone in each irradiation interval according to the degree of dispersion of the difference between the radiation dose at all times in each irradiation interval of each radiation zone and the radiation dose of the radiation source; determine the radiation enhancement difference of any radiation zone in each irradiation interval according to the distance measurement between the radiation enhancement ratio sequence of any radiation zone and the other radiation zones in each irradiation interval; use the inverse proportional mapping result of the radiation dose rate stability and the radiation enhancement difference of any radiation zone in each irradiation interval as the radiation consistency factor of any radiation zone in each irradiation interval; The irradiation enhancement factor and the irradiation consistency factor are forwardly fused to determine the radiation sufficiency coefficient of each irradiation area in each irradiation interval; the inverse proportional relationship between the radiation sufficiency coefficient of each irradiation area in each irradiation interval and the radiation distance is used as the radiation sufficiency distance of each irradiation area in each irradiation interval.

2. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The raw materials and weight portions of the bonding layer of the composite tape are: 120 parts of a polyolefin rubber composition, 20-40 parts of a polyolefin plastic composition, 100-230 parts of a filler, 120-330 parts of a tackifier, 2-5 parts of a processing aid, 3-10 parts of an antioxidant, and 3-10 parts of an antioxidant; the raw materials and weight portions of the reinforcing layer of the composite tape are: 120-190 parts of a polyolefin rubber composition, 50-80 parts of a polyolefin plastic composition, 100-230 parts of a filler, 8-28 parts of a tackifier, 3-10 parts of a processing aid, 15-25 parts of an operating oil, 3-10 parts of a radiation crosslinking agent, 3-10 parts of an antioxidant, and 3-10 parts of an antioxidant.

3. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The reinforcing layer polyolefin rubber composition is one of EPDM rubber, nitrile rubber, and chloroprene rubber; the polyolefin plastic composition is one of polyolefin elastomer, high-density polyethylene plastic, and styrene-isoprene-styrene block copolymer; the irradiation crosslinking agent is triallyl isocyanurate; the bonding layer polyolefin rubber composition is one of EPDM rubber, butyl rubber, and polyisobutylene rubber; the tackifier is one or both of polybutene and polyisobutylene; the processing aid is one or both of stearic acid and zinc stearate; the operating oil is one of white oil, paraffin oil 300, and paraffin oil 25110; the filler is one of calcium carbonate, clay, and kaolin; and the antioxidant is one or both of antioxidant MB and antioxidant RD.

4. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The mixing time is 30-50 minutes, and the mixture is taken out of the pot at 130-150°C.

5. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The temperature of the extruded reinforcement layer strip is 130-150°C.

6. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The specific operation of putting into the internal mixer is internal mixing to 130-150° C. and then taking out of the pot.

7. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The temperature of the extrusion bonding layer is 120-150°C.

8. The intelligent preparation process of a high heat-resistant insulating composite tape according to claim 1, characterized in that: The method for obtaining the irradiation crosslinking degree in each adjustment interval is: The sequence of radiation sufficient distances of all irradiation intervals in each adjustment interval of each radiation area is recorded as the radiation sufficient distance sequence of each radiation area in each adjustment interval, and the radiation sufficient prediction distance sequence of each adjustment interval is obtained by using a filtering algorithm; The radiation variation factor of each adjustment interval is determined based on the inverse proportional mapping of the similarity measure of the radiation sufficient distance sequence of all two-way combinations of radiation areas in each adjustment interval; the radiation linear response intensity of each adjustment interval is determined based on the difference between the radiation sufficient distance sequence and the radiation sufficient predicted distance sequence of all radiation areas in each adjustment interval; the inverse proportional mapping result of the radiation variation factor of each adjustment interval is forward fused with the radiation linear response intensity to obtain the radiation cross-linking degree of each adjustment interval.

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