An electronic component carrier tape sheet and a method for manufacturing the same

Abstract

The application relates to the technical field of materials, and discloses an electronic component carrier sheet and a preparation method thereof. The carrier sheet is prepared by mixing polyethylene terephthalate as a base material, elastomers, a compatilizer and modified inorganic additives as auxiliary materials, and a double-layer co-extrusion process, wherein the modified inorganic additives are prepared by forming hyperbranched siloxane macromolecules with a block structure of cyclopentane heterocycle-siloxane on the surface of halloysite nanotubes, the existence of the hyperbranched siloxane macromolecules can improve the compatibility of the halloysite nanotubes and the PET base material, and form a network structure with the halloysite nanotubes as the core, thereby realizing the reinforcement and modification of the sheet. Meanwhile, the siloxane structure and rigid cyclopentane heterocycle structure of the hyperbranched siloxane macromolecules have strong hydrophobicity, can form a super-hydrophobic layer on the surface of the PET, and can effectively prevent the moisture absorption phenomenon caused by high humidity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of materials, in particular to an electronic component carrier tape and a preparation method thereof. BACKGROUND

[0002] Electronic component carrier tape is a kind of strip-shaped material applied in the field of electronic component packaging and automatic mounting. It fixes electronic components at specific positions to prevent them from being physically damaged or contaminated during transportation and storage. Meanwhile, the sealing of the cover tape further enhances the sealing of the package, protecting electronic components from the external environment. Moreover, carrier tape packaging has the advantages of low cost and high efficiency, facilitating the automatic transmission, sorting and mounting of electronic components. This helps to reduce manual operation, reduce production cost and improve the overall efficiency of the production line, thus playing an important role in modern electronic manufacturing industry.

[0003] At present, carrier tapes are mainly divided into plastic carrier tapes and paper carrier tapes. Paper carrier tapes have the advantages of low cost and environmental protection, but their strength performance is not good and their transparency is low, so their application range is limited. Plastic carrier tapes have relatively high strength and high transparency, and are widely applicable, such as polyethylene terephthalate (PET) carrier tapes. However, such plastic carrier tapes are easily affected by the environment during use and are prone to moisture oxidation in a humid environment, which can contaminate electronic components. In addition, the mechanical strength of polyethylene terephthalate carrier tapes needs to be improved. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the deficiencies of the prior art, the present application provides an electronic component carrier tape and a preparation method thereof.

[0006] (II) Technical solutions

[0007] An electronic component carrier tape is made of the following raw materials by weight fraction:

[0008] Polyethylene terephthalate 45-60 parts, elastomer 10-15 parts, compatibilizer 5-10 parts, modified inorganic additive 3-6.5 parts, lubricant 1-2 parts, antioxidant 0.5-1.5 parts, plasticizer 0.5-1 part.

[0009] The modified inorganic additive is halloysite nanotube with hyperbranched siloxane macromolecules on the surface.

[0010] As a further solution of the present application, the elastomer is ABS, SBS or SEBS; and the compatibilizer is styrene-maleic anhydride copolymer.

[0011] As a further scheme of the present application, the preparation method of the modified inorganic additive comprises the following steps:

[0012] Step one, disperse the halloysite nanotubes in an ethanol aqueous solution with a volume fraction of 60-70% to form a uniform dispersion liquid, then add a silane coupling agent to the dispersion liquid under stirring, stir uniformly, heat to 60-70℃, keep stirring for 3-6h, then cool down and discharge, separate the solid material to obtain the organic halloysite nanotubes;

[0013] Step two, add the organic halloysite nanotubes to toluene, ultrasonically treat for 20-40min under a frequency of 80-100kHz, protect by passing nitrogen, then add a branching agent and a catalyst to the formed dispersion liquid, after adding, increase the temperature to 70-80℃, stir for 2-4h, then add 1,7-dichlorooctamethyltetrasiloxane to the dispersion liquid, after adding, further heat to 90-100℃, continuously stir for 8-16h, stop heating, cool down and discharge, centrifuge the solid material, and after washing, centrifuging and vacuum drying, the modified inorganic additive can be obtained.

[0014] As a further scheme of the present application, in step one, the silane coupling agent is 3-chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane or 3-bromopropyltriethoxysilane.

[0015] As a further scheme of the present application, in step two, the preparation method of the branching agent is as follows:

[0016] Add 1,3-cyclopentanedicarboxylic acid and glycidol to 1,4-dioxane, start stirring, after forming a uniform reaction liquid, add a phase transfer catalyst to the reaction liquid, pass nitrogen to remove air, heat to 60-70℃, continuously keep stirring for 4-8h, then remove the nitrogen, evaporate to remove the solvent, collect the product, and after purification, the branching agent can be obtained.

[0017] As a further scheme of the present application, the molar ratio of the 1,3-cyclopentanedicarboxylic acid and the glycidol is 1:2.

[0018] As a further scheme of the present application, the phase transfer catalyst is any one of tetrabutylammonium bromide, tetramethylammonium bromide, tetrabutylammonium hydrogen sulfate or N,N-dimethylbenzylamine.

[0019] As a further scheme of the present application, in step two, the catalyst is triethylamine.

[0020] Specifically, in the above technical scheme, first, the halogen-substituted silane coupling agent is used to modify the halogen-substituted organic halloysite nanotube, and then, under the action of the catalyst, the active hydroxyl substituent in the branched reagent structure can first react with the halogen substituent of the organic halloysite nanotube, and the remaining branched reagent in the system can further continuously polymerize with Si-Cl in the structure of 1,7-dichloro octamethyl tetrasiloxane, so as to form a hyperbranched siloxane macromolecule connected by siloxane bonds on the surface of the halloysite nanotube, and a modified inorganic additive is prepared.

[0021] As a further scheme of the present application, the lubricant is polyethylene wax or liquid paraffin; the antioxidant is at least one of antioxidant 1010, antioxidant 1076 or antioxidant 168; and the plasticizer is epoxy soybean oil.

[0022] A preparation method of an electronic component carrier sheet, comprising the following steps:

[0023] In the first step, the raw materials are weighed and divided into two parts, respectively, and then put into a stirring kettle for mechanical stirring and mixing, and then the formed uniform materials are respectively added into a double-screw extruder, the rotating speed is controlled at 80-100 r / min, and the temperature is controlled at 200-220 DEG C for extruding and granulating, and mother granules I and II are obtained, respectively.

[0024] In the second step, after the mother granules I and II are completely dried, they are fed into an extruder, the extrusion temperature is controlled at 180-200 DEG C, and then the same die is used for extrusion, so that the carrier sheet with a double-layer structure is prepared.

[0025] (Three) beneficial technical effects

[0026] The modified inorganic additive is prepared by forming the hyperbranched siloxane macromolecule connected by siloxane bonds on the surface of the halloysite nanotube and having a block structure of cyclopentane ring-siloxane, and the PET is modified by adding the modified inorganic additive, wherein the hyperbranched siloxane macromolecule can act as a transition structure between the halloysite nanotube and the PET substrate, and good compatibility between them is achieved, and the hyperbranched structure can extend to each region of the PET substrate in the form of a capillary tube in the melting process, and then a network structure with the halloysite nanotube as the core is formed, so that the advantages of the halloysite nanotube can be efficiently exerted, and the PET sheet is reinforced and modified, and meanwhile, the siloxane structure and the rigid cyclopentane ring structure of the hyperbranched siloxane macromolecule have strong hydrophobicity, and can form a super-hydrophobic layer on the surface of the PET, so that the moisture absorption phenomenon caused by high humidity can be effectively prevented. DETAILED DESCRIPTION

[0027] For the purpose of promoting the understanding of the present application, a more complete description of the application will be rendered. The following detailed description is set forth with reference to the accompanying drawings. The following detailed description is presented for purposes of fully and effectively disclosing the application. However, the application can be embodied in many different forms without being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0028] Embodiment 1

[0029] An electronic component carrier tape is made of the following raw materials by weight fraction:

[0030] Polyethylene terephthalate 45 parts, ABS elastomer 10 parts, compatibilizer styrene-maleic anhydride copolymer 5 parts, modified inorganic additive 3 parts, lubricant polyethylene wax 1 part, antioxidant 1010 0.5 parts, plasticizer epoxy soybean oil 0.5 parts;

[0031] The preparation method of the carrier tape comprises the following steps:

[0032] First step, after the raw materials are weighed by weight fraction, they are evenly divided into two parts and respectively put into the stirring kettle for mechanical stirring and mixing. Then the formed uniform materials are respectively added into the double screw extruder, the rotating speed is controlled at 80 r / min, and the extrusion granulation is carried out at the temperature of 200℃, and mother granule one and mother granule two are respectively obtained;

[0033] Second step, after the mother granule one and the mother granule two are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 180℃, and the carrier tape with double-layer structure is prepared by extruding at the same die.

[0034] Embodiment 2

[0035] An electronic component carrier tape is made of the following raw materials by weight fraction:

[0036] Polyethylene terephthalate 50 parts, SBS elastomer 12 parts, compatibilizer styrene-maleic anhydride copolymer 6 parts, modified inorganic additive 6 parts, lubricant polyethylene wax 1.5 parts, antioxidant 1076 1 part, plasticizer epoxy soybean oil 0.6 parts;

[0037] The preparation method of the carrier tape comprises the following steps:

[0038] First step, after the raw materials are weighed by weight fraction, they are evenly divided into two parts and respectively put into the stirring kettle for mechanical stirring and mixing. Then the formed uniform materials are respectively added into the double screw extruder, the rotating speed is controlled at 80 r / min, and the extrusion granulation is carried out at the temperature of 200℃, and mother granule one and mother granule two are respectively obtained;

[0039] Second step, after drying the master batch one and the master batch two completely, feeding into the extruder, controlling the extrusion temperature to be 200℃, extruding in the same die, thus the carrier tape sheet with double layer structure can be prepared.

[0040] Example 3

[0041] A carrier tape sheet for electronic components is prepared by using the following raw materials by weight:

[0042] Polyethylene terephthalate 60 parts, SBS elastomer 15 parts, compatible agent styrene-maleic anhydride copolymer 10 parts, modified inorganic additive 6.5 parts, lubricant polyethylene wax 2 parts, antioxidant 168 1.5 parts, plasticizer epoxy soybean oil 1 part;

[0043] The preparation method of the carrier tape sheet comprises the following steps:

[0044] First step, after weighing the raw materials by weight, dividing them into two parts, respectively, feeding into the stirring kettle for mechanical stirring and mixing, then adding the formed uniform materials into the double screw extruder respectively, controlling the rotating speed to be 100r / min, extruding and granulating under the temperature condition of 220℃, thus obtaining the master batch one and the master batch two respectively;

[0045] Second step, after drying the master batch one and the master batch two completely, feeding into the extruder, controlling the extrusion temperature to be 200℃, extruding in the same die, thus the carrier tape sheet with double layer structure can be prepared.

[0046] The modified inorganic additive in the above example is prepared by the following method:

[0047] Step one, dispersing 2.4g of halloysite nanotubes in 70% volume fraction of ethanol aqueous solution to form a uniform dispersion liquid, then adding 1.5g of 3-chloropropyl triethoxysilane into the dispersion liquid under stirring, stirring uniformly, increasing the temperature to 65℃, keeping the temperature and stirring for 4h, then cooling down and discharging, separating the solid material, thus obtaining the organic halloysite nanotubes;

[0048] Step two, adding 1.8g of the organic halloysite nanotubes into toluene, ultrasonic treating for 30min under the frequency of 100kHz, protecting by nitrogen, then adding 3.4g of branching agent and 0.5g of triethylamine into the formed dispersion liquid, after adding, increasing the temperature to 75℃, stirring for 3h, then adding 3.5g of 1,7-dichloro octamethyl tetrasiloxane into the dispersion liquid, after adding, further increasing the temperature to 100℃, continuously stirring for 12h, stopping heating, cooling down and discharging, centrifuging the solid material, after washing, centrifuging and vacuum drying, thus obtaining the modified inorganic additive.

[0049] The preparation method of the branching agent is as follows:

[0050] 0.4g of 1,3-cyclopentanedicarboxylic acid and 0.4g of glycidol were added to 1,4-dioxane, stirring was started, and after a homogeneous reaction liquid was formed, 0.01g of tetrabutylammonium bromide was added to the reaction liquid, nitrogen was bubbled to remove air, and the temperature was raised to 65°C. After stirring at 65°C for 6h, the nitrogen was removed, the solvent was evaporated, and the product was collected and purified to obtain the branching reagent.

[0051] Comparative Example 1

[0052] An electronic component carrier tape sheet was prepared using the following raw materials by weight:

[0053] Polyethylene terephthalate 50 parts, SBS elastomer 12 parts, compatibilizer styrene-maleic anhydride copolymer 6 parts, halloysite nanotube 6 parts, lubricant polyethylene wax 1.5 parts, antioxidant 1076 1 part, plasticizer epoxidized soybean oil 0.6 parts;

[0054] The preparation method of the carrier tape sheet includes the following steps:

[0055] First step, after the raw materials are weighed by weight fraction, they are evenly divided into two parts and respectively put into the stirring kettle for mechanical stirring and mixing. Then the formed uniform materials are respectively added to the double screw extruder, the rotating speed is controlled at 100r / min, and the temperature is controlled at 210°C for extruding and granulating to obtain master batch one and master batch two.

[0056] Second step, after the master batch one and master batch two are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 190°C, and the same die is used for extrusion to obtain the carrier tape sheet with double-layer structure.

[0057] Comparative Example 2

[0058] An electronic component carrier tape sheet was prepared using the following raw materials by weight:

[0059] Polyethylene terephthalate 50 parts, SBS elastomer 12 parts, compatibilizer styrene-maleic anhydride copolymer 6 parts, halloysite nanotube 6 parts, lubricant polyethylene wax 1.5 parts, antioxidant 1076 1 part, plasticizer epoxidized soybean oil 0.6 parts;

[0060] The preparation method of the carrier tape sheet includes the following steps:

[0061] First step, after the raw materials are weighed by weight fraction, they are evenly divided into two parts and respectively put into the stirring kettle for mechanical stirring and mixing. Then the formed uniform materials are respectively added to the double screw extruder, the rotating speed is controlled at 100r / min, and the temperature is controlled at 210°C for extruding and granulating to obtain master batch one and master batch two.

[0062] Secondly, after the master batch one and the master batch two are completely dried, they are fed into an extruder, the extrusion temperature is controlled at 190 DEG C, and the same die is used for extrusion, so that the carrier tape sheet with double-layer structure is prepared.

[0063] Performance test

[0064] The carrier tape sheets in the examples and the comparative examples are cut into test samples conforming to the specifications, and various performance tests are carried out;

[0065] According to the standard GB / T 1040.1-2018, the tensile property test is carried out;

[0066] The water contact angle of the sample is measured by using a water contact angle measuring instrument;

[0067] The test results are shown in the following table:

[0068]

[0069]

[0070] According to the test results, the carrier tape sheets prepared by directly using the unmodified halloysite nanotubes as the additive have poor performance in all directions. On the one hand, there is an interface problem, and agglomeration occurs, so that the advantages of the carrier tape sheets cannot be efficiently exerted. On the other hand, the hyperbranched siloxane molecules are lost, so that the super-hydrophobic surface cannot be formed.

[0071] The principles and implementation manners of the present application are described by applying specific examples in the present application. The above description of the examples is only used to help understand the method of the present application and its core idea, including the best mode, and also enables any person skilled in the art to practice the present application, including manufacturing and using any device or system, and implementing any combined method. It should be noted that, for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application. The scope of the patent protection of the present application is defined by the claims, and can include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

[0072] According to the ideal embodiments of the present application, through the above description, relevant personnel can definitely make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. An electronic component carrier tape sheet, characterized by, The following raw materials are used by weight parts: polyethylene terephthalate 45-60 parts, elastomer 10-15 parts, compatible agent 5-10 parts, modified inorganic additive 3-6.5 parts, lubricant 1-2 parts, antioxidant 0.5-1.5 parts, plasticizer 0.5-1 part; The modified inorganic additive is halloysite nanotube with hyperbranched siloxane macromolecule on the surface; The preparation method of the modified inorganic additive comprises the following steps: Step one, disperse halloysite nanotube in 60-70% volume fraction of ethanol aqueous solution to form a uniform dispersion, then add silane coupling agent to the dispersion under stirring, stir uniformly, heat to 60-70℃, keep stirring for 3-6h, then cool down, discharge, separate the solid material, and obtain organic halloysite nanotube; Step two, add the organic halloysite nanotube to toluene, ultrasonically treat for 20-40min at a frequency of 80-100kHz, protect by nitrogen, then add branching agent and catalyst to the formed dispersion, after adding, increase the temperature to 70-80℃, stir for 2-4h, then add 1,7-dichloro octamethyl tetrasiloxane to the dispersion, after adding, further increase the temperature to 90-100℃, continue stirring for 8-16h, stop heating, cool down, discharge, centrifuge the solid material, and after washing, centrifuging and vacuum drying, the modified inorganic additive is obtained; In step one, the silane coupling agent is 3-chloropropyl trimethoxysilane, 3-chloropropyl triethoxysilane or 3-bromopropyl triethoxysilane; In step two, the preparation method of the branching agent is as follows: Add 1,3-cyclopentanedicarboxylic acid and glycidol to 1,4-dioxane, start stirring, after forming a uniform reaction liquid, add phase transfer catalyst to the reaction liquid, introduce nitrogen to remove air, heat to 60-70℃, continue to keep stirring for 4-8h, then remove nitrogen, evaporate the solvent, collect the product, and after purification, the branching agent is obtained.

2. An electronic component carrier tape sheet according to claim 1, wherein The elastomer is ABS, SBS or SEBS; the compatible agent is styrene-maleic anhydride copolymer.

3. An electronic component carrier tape sheet according to claim 1, wherein The molar ratio of 1,3-cyclopentanedicarboxylic acid to glycidol is 1:

2.

4. An electronic component carrier tape sheet according to claim 1, wherein The phase transfer catalyst is any one of tetrabutylammonium bromide, tetramethylammonium bromide, tetrabutylammonium hydrogen sulfate or N,N-dimethylbenzylamine.

5. The electronic component carrier tape sheet of claim 1, wherein, In step two, the catalyst is triethylamine.

6. The electronic component carrier tape sheet according to claim 1, wherein The lubricant is polyethylene wax or liquid paraffin; the antioxidant is at least one of antioxidant 1010, antioxidant 1076 or antioxidant 168; the plasticizer is epoxidized soybean oil.

7. A method of producing an electronic component carrier tape sheet as claimed in claim 1, characterized by, The following steps are included: First step, after weighing each raw material by weight parts, divide them into two parts, respectively, and put them into a stirring kettle for mechanical stirring and mixing, then add the formed uniform materials into a double screw extruder respectively, control the rotating speed to be 80-100r / min, and extrude and granulate at a temperature of 200-220℃, to obtain master batch one and master batch two respectively; Second step, after the mother granule one and the mother granule two are dried completely, feed into the extruder, control the extrusion temperature to be 180-200 ℃, extrude in the same mouth mould, can prepare the carrier tape sheet material with double layer structure.

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