Electronic component carrier tape sheet and preparation method thereof

Abstract

The invention relates to the technical field of materials, and discloses an electronic component carrier tape sheet and a preparation method thereof.The carrier tape sheet is prepared by taking polyethylene glycol terephthalate as a base material and taking an elastomer, a compatilizer, a modified inorganic additive and the like as auxiliary materials through mixing and double-layer co-extrusion processes. Wherein the modified inorganic additive is prepared by forming hyperbranched siloxane macromolecules which are connected through silicon-oxygen bonds and have a cyclopentyl heterocycle-siloxane block structure on the surface of a halloysite nanotube, and the compatibility of the halloysite nanotube and a PET base material can be improved due to the existence of the hyperbranched siloxane macromolecules; according to the invention, hyperbranched siloxane macromolecules are added into a rigid cyclopentyl heterocyclic ring structure, a network structure taking the halloysite nanotube as a core is formed, the sheet material is reinforced and modified, and meanwhile, the siloxane structure and the rigid cyclopentyl heterocyclic ring structure of the hyperbranched siloxane macromolecules have strong hydrophobicity, so that a super-hydrophobic layer can be formed on the PET surface, and the phenomenon of dampness caused by relatively high humidity can be effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of materials, and in particular to an electronic component carrier sheet and a preparation method thereof. Background Art

[0002] Electronic component carrier tape is a strip of material used in electronic component packaging and automated placement. It secures electronic components in place, protecting them from physical damage or contamination during transportation and storage. The cover tape seal further enhances the package's seal, protecting the electronic components from environmental influences. Furthermore, carrier tape packaging offers the advantages of low cost and high efficiency, facilitating the automated transport, sorting, and placement of electronic components. This reduces manual labor, lowers production costs, and improves overall production line efficiency, playing a vital role in the modern electronics manufacturing industry.

[0003] Currently, 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 poor and their transparency is low, so their application range is limited. Plastic carrier tapes are relatively strong and transparent, and have a wider range of applications, such as polyethylene terephthalate (PET) carrier tapes. However, this type of plastic carrier is easily affected by the environment during use. In a humid environment, it is easy to get damp and oxidize, causing contamination of electronic components. In addition, the mechanical strength of polyethylene terephthalate carrier tapes needs to be improved. Summary of the Invention

[0004] (1) Technical problems solved

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

[0006] (2) Technical solution

[0007] An electronic component carrier sheet is made of the following raw materials in parts by weight:

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

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

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

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

[0012] Step 1: Dispersing the halloysite nanotubes in a 60-70% by volume ethanol aqueous solution to form a uniform dispersion, then adding a silane coupling agent to the dispersion under stirring, stirring evenly, heating to 60-70°C, keeping the temperature and stirring for 3-6 hours, cooling the material, separating the solid material, and obtaining the organic halloysite nanotubes;

[0013] Step 2: Add the organic halloysite nanotubes to toluene, ultrasonically treat at a frequency of 80-100kHz for 20-40min, introduce nitrogen for protection, then add the branching reagent and catalyst to the formed dispersion, after the addition is completed, raise the temperature to 70-80°C, stir for 2-4h, and then add 1,7-dichlorooctamethyltetrasiloxane to the dispersion, after the addition is completed, further heat to 90-100°C, continue stirring for 8-16h, stop heating, cool the material, centrifuge the solid material, wash, centrifuge, and vacuum dry to obtain the modified inorganic additive.

[0014] As a further embodiment of the present invention, in step 1, the silane coupling agent is 3-chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane or 3-bromopropyltriethoxysilane.

[0015] As a further embodiment of the present invention, in step 2, the preparation method of the branching reagent is as follows:

[0016] 1,3-cyclopentanedicarboxylic acid and glycidol are added to 1,4-dioxane and stirred until a uniform reaction liquid is formed. A phase transfer catalyst is then added to the reaction liquid, nitrogen is introduced to expel the air, the temperature is raised to 60-70°C, and stirring is continued for 4-8 hours. The nitrogen is then removed, the solvent is evaporated, the product is collected, and purification treatment is performed to obtain a branching reagent.

[0017] As a further embodiment of the present invention, the molar ratio of 1,3-cyclopentanedicarboxylic acid to glycidol is 1:2.

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

[0019] As a further embodiment of the present invention, in step 2, the catalyst is triethylamine.

[0020] Specifically, in the above technical scheme, the halloysite nanotubes are first organically modified using a silane coupling agent containing a halogen substituent to obtain an organic halloysite nanotube with a surface modified with a halogen substituent. Then, under the action of a catalyst, the active hydroxyl substituent in the branching reagent structure can first undergo a substitution reaction with the halogen substituent of the organic halloysite nanotube, and the remaining branching reagent in the system can further undergo continuous branching polymerization with the Si-Cl in the 1,7-dichlorooctamethyltetrasiloxane structure, thereby forming a hyperbranched siloxane macromolecule connected by a silicon-oxygen bond and having a block structure of cyclopentacyclic-siloxane on the surface of the halloysite nanotube to obtain a modified inorganic additive.

[0021] As a further embodiment of the present invention, 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 epoxidized soybean oil.

[0022] A method for preparing an electronic component carrier tape sheet comprises the following steps:

[0023] The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the resulting uniform materials into a twin-screw extruder, control the speed to 80-100r / min, and extrude granules at a temperature of 200-220°C to obtain masterbatch 1 and masterbatch 2 respectively;

[0024] In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 180-200°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

[0025] (3) Beneficial technical effects

[0026] The present invention forms hyperbranched siloxane macromolecules connected by silicon-oxygen bonds and having a cyclopentacyclic-siloxane block structure on the surface of halloysite nanotubes to prepare a modified inorganic additive, which is then added to modify PET. The hyperbranched siloxane macromolecules can serve as a transition structure between the halloysite nanotubes and the PET substrate, achieving good compatibility between the two. Moreover, the hyperbranched structure can extend to various regions of the PET substrate in a capillary-like form during the melting process, thereby forming a network structure with the halloysite nanotubes as the core. This allows the advantages of the halloysite nanotubes to be effectively utilized, achieving enhanced modification of the sheet. Furthermore, the siloxane structure and the rigid cyclopentacyclic structure of the hyperbranched siloxane macromolecules have strong hydrophobicity, and can form a super-hydrophobic layer on the PET surface, effectively preventing moisture caused by high humidity. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present invention, the present invention will be described in more detail below. Preferred embodiments of the present invention are provided below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0028] Example 1

[0029] An electronic component carrier sheet is made of the following raw materials in parts by weight:

[0030] 45 parts of polyethylene terephthalate, 10 parts of ABS elastomer, 5 parts of styrene-maleic anhydride copolymer (compatibility agent), 3 parts of modified inorganic additive, 1 part of lubricant polyethylene wax, 0.5 parts of antioxidant 1010, and 0.5 parts of plasticizer epoxidized soybean oil;

[0031] The method for preparing the carrier sheet comprises the following steps:

[0032] The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the formed uniform materials into a twin-screw extruder, control the speed to 80r / min, and extrude granules at a temperature of 200°C to obtain masterbatch 1 and masterbatch 2 respectively;

[0033] In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 180°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

[0034] Example 2

[0035] An electronic component carrier sheet is made of the following raw materials in parts by weight:

[0036] 50 parts of polyethylene terephthalate, 12 parts of SBS elastomer, 6 parts of styrene-maleic anhydride copolymer (compatibility agent), 6 parts of modified inorganic additive, 1.5 parts of lubricant polyethylene wax, 10761 parts of antioxidant, 0.6 parts of plasticizer epoxy soybean oil;

[0037] The method for preparing the carrier sheet comprises the following steps:

[0038] The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the formed uniform materials into a twin-screw extruder, control the speed to 100r / min, and extrude granules at a temperature of 210°C to obtain masterbatch 1 and masterbatch 2 respectively;

[0039] In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 190°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

[0040] Example 3

[0041] An electronic component carrier sheet is made of the following raw materials in parts by weight:

[0042] 60 parts of polyethylene terephthalate, 15 parts of SBS elastomer, 10 parts of styrene-maleic anhydride copolymer (compatibility agent), 6.5 parts of modified inorganic additive, 2 parts of lubricant polyethylene wax, 1681.5 parts of antioxidant, 1 part of plasticizer epoxy soybean oil;

[0043] The method for preparing the carrier sheet comprises the following steps:

[0044] The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the formed uniform materials into a twin-screw extruder, control the speed to 100r / min, and extrude granules at a temperature of 220°C to obtain masterbatch 1 and masterbatch 2 respectively;

[0045] In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 200°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

[0046] The modified inorganic additives in the above examples were prepared by the following method:

[0047] Step 1: 2.4 g of halloysite nanotubes were dispersed in a 70% by volume ethanol aqueous solution to form a uniform dispersion. 1.5 g of 3-chloropropyltriethoxysilane was then added to the dispersion under stirring, and the mixture was stirred evenly. The mixture was heated to 65° C., stirred at this temperature for 4 h, cooled, discharged, and the solid material was separated to obtain the organic halloysite nanotubes.

[0048] Step 2: Add 1.8 g of organic halloysite nanotubes to toluene, ultrasonically treat at a frequency of 100 kHz for 30 min, introduce nitrogen for protection, then add 3.4 g of branching reagent and 0.5 g of triethylamine to the formed dispersion. After the addition is completed, raise the temperature to 75 ° C. and stir for 3 hours. Then, add 3.5 g of 1,7-dichlorooctamethyltetrasiloxane to the dispersion. After the addition is completed, further heat to 100 ° C. and continue stirring for 12 hours. Stop heating, cool the material, centrifuge the solid material, wash, centrifuge, and vacuum dry to obtain a modified inorganic additive.

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

[0050] 0.4 g of 1,3-cyclopentanedicarboxylic acid and 0.4 g of glycidol were added to 1,4-dioxane and stirred until a uniform reaction solution was formed. Then, 0.01 g of tetrabutylammonium bromide was added to the reaction solution, nitrogen was introduced to expel the air, and the temperature was raised to 65°C. After continuous stirring for 6 hours, the nitrogen was removed, the solvent was evaporated, the product was collected, and purified to obtain a branched reagent.

[0051] Comparative Example 1

[0052] An electronic component carrier sheet is made of the following raw materials in parts by weight:

[0053] 50 parts of polyethylene terephthalate, 12 parts of SBS elastomer, 6 parts of styrene-maleic anhydride copolymer as a compatibilizer, 6 parts of halloysite nanotubes, 1.5 parts of polyethylene wax as a lubricant, 10761 parts of antioxidant, and 0.6 parts of epoxy soybean oil as a plasticizer;

[0054] The method for preparing the carrier sheet comprises the following steps:

[0055] The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the formed uniform materials into a twin-screw extruder, control the speed to 100r / min, and extrude granules at a temperature of 210°C to obtain masterbatch 1 and masterbatch 2 respectively;

[0056] In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 190°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

[0057] Comparative Example 2

[0058] An electronic component carrier sheet is made of the following raw materials in parts by weight:

[0059] 50 parts of polyethylene terephthalate, 12 parts of SBS elastomer, 6 parts of styrene-maleic anhydride copolymer as a compatibilizer, 1.5 parts of polyethylene wax as a lubricant, 10761 parts of antioxidant, and 0.6 parts of epoxy soybean oil as a plasticizer;

[0060] The method for preparing the carrier sheet comprises the following steps:

[0061] The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the formed uniform materials into a twin-screw extruder, control the speed to 100r / min, and extrude granules at a temperature of 210°C to obtain masterbatch 1 and masterbatch 2 respectively;

[0062] In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 190°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

[0063] Performance Testing

[0064] The carrier sheets in the examples and comparative examples were cut into test samples that met the specifications and subjected to various performance tests;

[0065] According to the standard GB / T 1040.1-2018, tensile properties test was performed;

[0066] Use a water contact angle meter to measure the water contact angle of the sample;

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

[0068]

[0069]

[0070] According to the test results, the carrier sheet prepared by directly using unsurface-modified halloysite nanotubes as additives has poor performance in all directions. On the one hand, this is due to the existence of interface problems, which cause agglomeration and prevent the efficient use of its own advantages. On the other hand, it is due to the loss of hyperbranched siloxane molecules, which makes it impossible to form a superhydrophobic surface.

[0071] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may 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 description of the claims, or if they include equivalent structural elements that are not substantially different from the literal description of the claims, then these other embodiments should also be included in the scope of the claims.

[0072] Based on the ideal embodiments of the present invention, and with reference to the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electronic component carrier sheet, characterized in that: The invention is prepared by using the following raw materials in parts by weight: 45-60 parts of polyethylene terephthalate, 10-15 parts of elastomer, 5-10 parts of compatibilizer, 3-6.5 parts of modified inorganic additive, 1-2 parts of lubricant, 0.5-1.5 parts of antioxidant, 0.5-1 part of plasticizer; The modified inorganic additive is a halloysite nanotube with a surface modified with hyperbranched siloxane macromolecules.

2. The electronic component carrier sheet according to claim 1, characterized in that: The elastomer is ABS, SBS or SEBS; and the compatibilizer is styrene-maleic anhydride copolymer.

3. The electronic component carrier sheet according to claim 1, characterized in that: The preparation method of the modified inorganic additive comprises the following steps: Step 1: Dispersing the halloysite nanotubes in a 60-70% by volume ethanol aqueous solution to form a uniform dispersion, then adding a silane coupling agent to the dispersion under stirring, stirring evenly, heating to 60-70°C, keeping the temperature and stirring for 3-6 hours, cooling the material, separating the solid material, and obtaining the organic halloysite nanotubes; Step 2: Add the organic halloysite nanotubes to toluene, ultrasonically treat at a frequency of 80-100kHz for 20-40min, introduce nitrogen for protection, then add the branching reagent and catalyst to the formed dispersion, after the addition is completed, raise the temperature to 70-80°C, stir for 2-4h, and then add 1,7-dichlorooctamethyltetrasiloxane to the dispersion, after the addition is completed, further heat to 90-100°C, continue stirring for 8-16h, stop heating, cool the material, centrifuge the solid material, wash, centrifuge, and vacuum dry to obtain the modified inorganic additive.

4. The electronic component carrier sheet according to claim 3, characterized in that: In step 1, the silane coupling agent is 3-chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane or 3-bromopropyltriethoxysilane.

5. The electronic component carrier sheet according to claim 3, characterized in that: In step 2, the preparation method of the branching reagent is as follows: 1,3-cyclopentanedicarboxylic acid and glycidol are added to 1,4-dioxane and stirred until a uniform reaction liquid is formed. A phase transfer catalyst is then added to the reaction liquid, nitrogen is introduced to expel the air, the temperature is raised to 60-70°C, and stirring is continued for 4-8 hours. The nitrogen is then removed, the solvent is evaporated, the product is collected, and purification treatment is performed to obtain a branching reagent.

6. The electronic component carrier sheet according to claim 5, characterized in that: The molar ratio of the 1,3-cyclopentanedicarboxylic acid to glycidol is 1:

2.

7. The electronic component carrier sheet according to claim 5, characterized in that: The phase transfer catalyst is any one of tetrabutylammonium bromide, tetramethylammonium bromide, tetrabutylammonium hydrogen sulfate or N,N-dimethylbenzylamine.

8. The electronic component carrier sheet according to claim 3, characterized in that: In step 2, the catalyst is triethylamine.

9. The electronic component carrier sheet according to claim 1, characterized in that: 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 epoxidized soybean oil.

10. A method for preparing an electronic component carrier sheet according to claim 1, characterized in that: The following steps are involved: The first step is to weigh each raw material by weight, divide it into two parts, put them into a stirring tank and mechanically stir and mix them evenly, then add the resulting uniform materials into a twin-screw extruder, control the speed to 80-100r / min, and extrude granules at a temperature of 200-220°C to obtain masterbatch 1 and masterbatch 2 respectively; In the second step, after the masterbatch 1 and masterbatch 2 are completely dried, they are fed into the extruder, the extrusion temperature is controlled at 180-200°C, and they are extruded through the same die to obtain a carrier sheet with a double-layer structure.

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