TPE (thermoplastic elastomer) material for IC (integrated circuit) packaging tube sealing plug and preparation method of TPE material

Abstract

The invention relates to the technical field of polymer elastomer materials, and discloses a TPE (thermoplastic elastomer) material for sealing an IC (integrated circuit) packaging tube and a preparation method of the TPE material, and the TPE material for sealing the IC packaging tube comprises the following raw materials in parts by weight: 25-35 parts of rubber, 25-35 parts of mineral oil, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of a lubricant, 0.2-0.3 part of an antioxidant and 0.3-0.5 part of an ultraviolet light absorber. The TPE material prepared by the invention has excellent elasticity and heat resistance, can be suitable for complex and changeable packaging environments, and effectively prevents the problem of material aging caused by ultraviolet erosion, thereby ensuring the safety of IC packaging tubes in transportation and storage processes; the preparation method provided by the invention adopts simple equipment and process, and leftover materials generated in the production process can be repeatedly utilized, so that the material cost is further saved, and the resource utilization rate is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer elastomer materials, and in particular relates to a TPE material for sealing an IC packaging tube and a preparation method thereof. Background Art

[0002] IC packaging tube is a kind of tube specially used for packaging and protecting IC (integrated circuit), integrated block, semiconductor, electronic components, transformer parts and precision electronic components. The main function of IC packaging tube is to provide physical protection and electrostatic protection. In the manufacturing and distribution chain of electronic products, these components need to be transported and stored many times, and may encounter various physical shocks such as falling, squeezing or vibration. IC packaging tube effectively absorbs these external forces and prevents internal components from being damaged through its sturdy and flexible design. In addition, many electronic components are extremely sensitive to static electricity, and even a small electrostatic discharge may cause component failure. Therefore, high-quality IC packaging tube also has anti-static properties. Through special treatment inside or on the surface, it can effectively neutralize static electricity and protect components from damage by electrostatic discharge (ESD). This kind of packaging tube is made of various materials. Common materials on the market include polyvinyl chloride (PVC), polystyrene (PS) and ethylene glycol-modified polyethylene terephthalate (PETG).

[0003] In order to further enhance the protection performance of IC packaging tubes, plugs are usually installed at both ends. These plugs not only seal to prevent dust, moisture or other contaminants from entering the tube, but more importantly, they effectively prevent the internal components from moving and colliding during transportation by fitting tightly to the tube mouth. Especially in long-distance transportation or harsh conditions, the presence of plugs greatly reduces the risk of components falling due to vibration or external force, ensuring the safety and stability of the product.

[0004] However, the mainstream PVC-based plugs on the market have a certain elasticity and can meet the basic fixing and buffering needs. However, after long-term use, especially under high temperature, humidity or ultraviolet radiation, the PVC material is prone to aging, which is manifested as yellowing, increased hardness and decreased resilience. This aging phenomenon not only affects the sealing effect of the plug, but may also cause it to be unable to effectively fix the components, increasing the risk of product damage. In addition, aging PVC plugs may also release harmful substances, posing a potential threat to the environment and human health. Summary of the invention

[0005] The purpose of the present invention is to overcome the above problems and provide a TPE material for IC packaging tube sealing and a preparation method thereof. The use of TPE elastomer material makes the sealing of the IC packaging tube have excellent yellowing resistance and better resilience and meets environmental protection requirements.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides a TPE material for sealing an IC packaging tube, comprising the following raw materials in parts by weight: 25-35 parts of rubber, 25-35 parts of mineral oil, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of lubricant, 0.2-0.3 parts of antioxidant and 0.3-0.5 parts of ultraviolet absorber.

[0007] A further improvement of the present invention is that the rubber is a styrene-based elastomer SEBS or a styrene-based elastomer SBS; The SEBS is one of SEBS YH-501, SEBS YH-503, SEBS YH-563, SEBS YH-602, SEBS YH-604 and SEBS YH-688, or a mixture of more than one thereof; The SBS is one of YH-792E, YH-791E, YH-796E and YH788 or a mixture of more than one of them.

[0008] A further improvement of the present invention is that the mineral oil is cyclohexane oil or paraffin oil.

[0009] A further improvement of the present invention is that the resin is polystyrene, polypropylene or polyethylene; and the mineral filler is calcium carbonate or talcum powder.

[0010] A further improvement of the present invention is that the lubricant is polyethylene wax or erucamide.

[0011] A further improvement of the present invention is that the antioxidant is a mixture of 168 and 1010 in a ratio of 1:1 or 1:2.

[0012] A further improvement of the present invention is that the ultraviolet absorber is one of UV-531, UV-326 and UV-327 or a mixture of more than one of them.

[0013] In a second aspect, the present invention further provides a method for preparing a TPE material for sealing an IC packaging tube, comprising the following steps: Step 1, weighing raw materials according to weight: 25-35 parts of rubber, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of lubricant, 0.2-0.3 parts of antioxidant and 0.3-0.5 parts of ultraviolet absorber, and then putting the weighed raw materials into a high-speed mixer and stirring them evenly to obtain a mixture; Step 2, adding 25-35 parts of mineral oil to the above mixture, and mixing and stirring in a high-speed mixer until the rubber completely absorbs the mineral oil to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for IC packaging tube sealing, and finally drying and packaging.

[0014] A further improvement of the present invention is that in step 1, the speed of the high-speed mixer is 100-300 r / min, and the stirring time is 1-5 min; in step 2, the speed of the high-speed mixer is 400-600 r / min, and the stirring time is 10-15 min.

[0015] A further improvement of the present invention is that the temperature of the twin-screw extruder from zone 1 to zone 8 and the die head is as follows: The temperature of zone one is 155~165℃, the temperature of zone two is 175~185℃, the temperature of zone three is 185~195℃, the temperature of zone four is 195~205℃, the temperature of zone five is 195~205℃, the temperature of zone six is ​​215~225℃, the temperature of zone seven is 215~225℃, the temperature of zone eight is 205~215℃, and the temperature of the machine head is 185~195℃.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Compared with traditional PVC sealing materials, the TPE material for sealing provided by the present invention has excellent elasticity and heat resistance, and can be adapted to complex and changeable packaging environments. In addition, by adding ultraviolet absorbers, the material aging problem caused by ultraviolet erosion is effectively prevented, thereby ensuring the safety of the IC packaging tube during transportation and storage, and meeting environmental protection requirements; the preparation method provided by the present invention adopts simple equipment and processes, and can be extruded and formed by a twin-screw extruder, and the scraps generated in the production process can be reused, further saving material costs and improving resource utilization. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to understand the characteristics and effects of the present invention, the following is a general description and definition of the terms and expressions mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used in the text are the common meanings understood by those skilled in the art for the present invention. In the event of a conflict, the definition in this specification shall prevail.

[0018] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, that is, the present invention can be implemented without being limited by any specific theory or mechanism.

[0019] In this article, all features such as values, quantities, contents and concentrations defined in the form of numerical ranges or percentage ranges are for simplicity and convenience only. Accordingly, the description of numerical ranges or percentage ranges should be considered to have included and specifically disclosed all possible secondary ranges and individual values ​​within the range (including integers and fractions).

[0020] In this document, unless otherwise specified, “includes,” “including,” “contains,” “has,” or similar terms cover the meanings of “consisting of” and “mainly consisting of,” for example, “A includes a” covers the meanings of “A includes a and other” and “A only includes a.”

[0021] In this document, in order to make the description concise, not all possible combinations of various technical features in various embodiments or examples are described. Therefore, as long as there is no contradiction in the combination of these technical features, the various technical features in various embodiments or examples can be combined arbitrarily, and all possible combinations should be considered to be within the scope of this specification.

[0022] The invention provides a TPE material for sealing an IC packaging tube, comprising the following raw materials in parts by weight: 25-35 parts of rubber, 25-35 parts of mineral oil, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of lubricant, 0.2-0.3 parts of antioxidant and 0.3-0.5 parts of ultraviolet absorber.

[0023] As a preferred embodiment, the rubber is a styrene-based elastomer SEBS or a styrene-based elastomer SBS, the SEBS is one of SEBS YH-501, SEBS YH-503, SEBS YH-563, SEBS YH-602, SEBS YH-604 and SEBS YH-688 or a mixture of more than one of them; the SBS is one of YH-792E, YH-791E, YH-796E and YH788 or a mixture of more than one of them.

[0024] As a preferred embodiment, the mineral oil is kn4010 naphthenic oil or 2280 paraffin oil; the resin is polystyrene, polypropylene or polyethylene, specifically one of PP K8003, PP EP540V and PP K7100 or a mixture of more than one of them.

[0025] As a preferred embodiment, the mineral filler is 800 mesh calcium carbonate or talc; the lubricant is LP1024P polyethylene wax or erucic acid amide; the antioxidant is a mixture of 168 and 1010 in a ratio of 1:1 or 1:2; and the ultraviolet absorber is one or a mixture of more than one of UV-531, UV-326 and UV-327.

[0026] The present invention also provides a method for preparing a TPE material for IC packaging tube sealing, comprising the following steps: Step 1, weighing raw materials according to weight: 25-35 parts of rubber, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of lubricant, 0.2-0.3 parts of antioxidant and 0.3-0.5 parts of ultraviolet absorber, then putting the weighed raw materials into a high-speed mixer and stirring at a speed of 100-300 r / min for 1-5 minutes to obtain a mixture; Step 2, adding 25-35 parts of mineral oil weighed by weight to the mixture obtained in step 1, and stirring at a speed of 400-600 r / min for 10-15 minutes in a high-speed mixer until the rubber completely absorbs the mineral oil to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for IC packaging tube sealing, and finally drying and packaging for standby use.

[0027] Among them, the temperatures of the twin-screw extruder from zone one to zone eight and the die head are: zone one temperature is 155~165℃, zone two temperature is 175~185℃, zone three temperature is 185~195℃, zone four temperature is 195~205℃, zone five temperature is 195~205℃, zone six temperature is 215~225℃, zone seven temperature is 215~225℃, zone eight temperature is 205~215℃, and the die head temperature is 185~195℃.

[0028] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0029] The following examples use conventional instruments and equipment in the art. The experimental methods in the following examples where specific conditions are not specified are usually carried out under conventional conditions or under conditions recommended by the manufacturer. The various raw materials used in the following examples are conventional commercial products unless otherwise specified, and their specifications are conventional specifications in the art. In the specification of the present invention and the following examples, unless otherwise specified, "%" means weight percentage, "part" means weight part, and ratio means weight ratio.

[0030] Example 1 Step 1, first weighing 35 parts of SEBS YH-602 rubber, 30 parts of PP K8003 resin, 5 parts of mineral filler, namely calcium carbonate, 1 part of lubricant, namely polyethylene wax, 0.3 parts of antioxidant and 0.5 parts of UV-326 ultraviolet absorber according to weight parts, and then putting the weighed raw materials into a high-speed mixer and stirring at a speed of 200 r / min for 5 minutes to obtain a mixture; Step 2, adding 30 parts of mineral oil, namely KN4010 naphthenic oil, weighed in parts by weight to the mixture obtained in step 1, and stirring at a speed of 500 r / min for 10 minutes in a high-speed mixer until the rubber completely absorbs the mineral oil to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for IC packaging tube sealing, and then drying and packaging.

[0031] Among them, the temperatures of the twin-screw extruder from zone one to zone eight and the die head are: zone one temperature is 160°C, zone two temperature is 175°C, zone three temperature is 185°C, zone four temperature is 195°C, zone five temperature is 195°C, zone six temperature is 215°C, zone seven temperature is 215°C, zone eight temperature is 205°C, and the die head temperature is 185°C; the particle size of the aforementioned calcium carbonate is 800 mesh; the aforementioned polyethylene wax model is LP1024P; the aforementioned antioxidant is a mixture of 168 and 1010 in a 1:1 ratio.

[0032] The physical property test results of the TPE material for IC packaging tube sealing prepared in this embodiment are shown in Table 1, wherein the tensile strength is 15.2 MPa, the elongation at break is 630%, the Shore hardness is 88A, and the density is 0.96 g / cm 3 , the melt flow rate is 7.4g / 10min.

[0033] The aging test results show that at an irradiance of 1.05w / (m 2 .nm) @313nm, 4h drying (60℃) + 4h condensation (50℃), and 168h aging cycle, the yellowing value of the TPE material for IC packaging tube sealing prepared in this embodiment is 12.52, which is the smallest among the five embodiments, indicating that it has the best yellowing resistance. This is because the high addition ratio of the ultraviolet absorber and the antioxidant can better absorb ultraviolet light energy and has a good protective effect on the formulation system.

[0034] Example 2 Step 1, first weigh 25 parts of SEBS YH-602 rubber, 30 parts of PP T30S resin, 15 parts of mineral filler, namely calcium carbonate, 1.5 parts of lubricant, namely polyethylene wax, 0.2 parts of antioxidant compounded by 168 and 1010 in a ratio of 1:1, and 0.3 parts of UV-326 ultraviolet absorber according to weight parts, then put the weighed raw materials into a high-speed mixer and stir at a speed of 200 r / min for 5 minutes to obtain a mixture; Step 2, adding 30 parts of mineral oil, i.e. 2280 paraffin oil, weighed in parts by weight to the mixture obtained in step 1, and stirring in a high-speed mixer at a speed of 500 r / min for 10 minutes until the rubber completely absorbs the mineral oil, to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for sealing an IC packaging tube, and then drying and packaging.

[0035] The temperatures of the twin-screw extruder from zone 1 to zone 8 and the die head are: zone 1 temperature is 165°C, zone 2 temperature is 185°C, zone 3 temperature is 195°C, zone 4 temperature is 205°C, zone 5 temperature is 205°C, zone 6 temperature is 225°C, zone 7 temperature is 225°C, zone 8 temperature is 215°C, and the die head temperature is 195°C. The contents not mentioned in this embodiment are the same as those described in Example 1.

[0036] The physical property test results of the TPE material for IC packaging tube sealing prepared in this embodiment are shown in Table 1, wherein the tensile strength is 13.7 MPa, the elongation at break is 450%, the Shore hardness is 85A, and the density is 1.04 g / cm 3 , the melt flow rate is 8.1g / 10min.

[0037] The aging test results show that at an irradiance of 1.05w / (m 2 .nm) @313nm, 4h drying (60℃) + 4h condensation (50℃), and 168h aging cycle, the yellowing value of the TPE material for IC packaging tube sealing prepared in this embodiment is 17.83, which is smaller than that in the five embodiments, indicating that it has better yellowing resistance. This is because the addition ratio of the ultraviolet absorber and antioxidant is slightly lower than that in Example 1, and its ability to absorb ultraviolet light energy is slightly weaker.

[0038] Example 3 Step 1, firstly weigh 35 parts of SBS YH-792E rubber, 30 parts of PP K8003 resin, 5 parts of mineral filler, namely calcium carbonate, 1 part of lubricant, namely polyethylene wax, 0.3 parts of antioxidant and 0.5 parts of UV-326 ultraviolet absorber according to weight parts, and then put the weighed raw materials into a high-speed mixer and stir at a speed of 200 r / min for 5 minutes to obtain a mixture; Step 2, adding 30 parts of mineral oil, namely KN4010 naphthenic oil, weighed in parts by weight to the mixture obtained in step 1, and stirring at a speed of 500 r / min for 10 minutes in a high-speed mixer until the rubber completely absorbs the mineral oil to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for sealing an IC packaging tube, and then drying and packaging.

[0039] The temperatures of the twin-screw extruder from zone 1 to zone 8 and the die head are: zone 1 temperature is 155°C, zone 2 temperature is 180°C, zone 3 temperature is 185°C, zone 4 temperature is 195°C, zone 5 temperature is 200°C, zone 6 temperature is 215°C, zone 7 temperature is 215°C, zone 8 temperature is 210°C, and the die head temperature is 195°C. The contents not mentioned in this embodiment are the same as those described in Example 1.

[0040] The physical property test results of the TPE material for IC packaging tube sealing prepared in this embodiment are shown in Table 1, wherein the tensile strength is 14.5 MPa, the elongation at break is 520%, the Shore hardness is 86A, and the density is 1.01 g / cm 3 , melt flow rate is 5.5g / 10min, The aging test results show that at an irradiance of 1.05w / (m 2 .nm) @313nm, 4h drying (60℃) + 4h condensation (50℃), and 168h aging cycle, the yellowing value of the TPE material for IC packaging tube sealing prepared in this embodiment is 20.2, which is larger among the five embodiments, indicating that its yellowing resistance is poor. This is because compared with Example 1, under the conditions of the same proportion of ultraviolet absorber and antioxidant, the yellowing resistance of SBS is reduced.

[0041] Example 4 Step 1, first weighing 30 parts of SEBS YH-602 rubber, 30 parts of PP K8003 resin, 5 parts of mineral filler, namely calcium carbonate, 1 part of lubricant, namely polyethylene wax, 0.3 parts of antioxidant and 0.4 parts of UV-326 ultraviolet absorber according to weight parts, and then putting the weighed raw materials into a high-speed mixer and stirring at a speed of 200 r / min for 5 minutes to obtain a mixture; Step 2, adding 30 parts of mineral oil, namely KN4010 naphthenic oil, weighed in parts by weight to the mixture obtained in step 1, and stirring at a speed of 500 r / min for 10 minutes in a high-speed mixer until the rubber completely absorbs the mineral oil to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for IC packaging tube sealing, and then drying and packaging.

[0042] Among them, the temperatures of the twin-screw extruder from zone 1 to zone 8 and the die head are: zone 1 temperature is 160°C, zone 2 temperature is 175°C, zone 3 temperature is 190°C, zone 4 temperature is 200°C, zone 5 temperature is 200°C, zone 6 temperature is 220°C, zone 7 temperature is 220°C, zone 8 temperature is 210°C, and the die head temperature is 190°C; the particle size of the aforementioned calcium carbonate is 800 mesh; the aforementioned polyethylene wax model is LP1024P; the aforementioned antioxidant is a mixture of 168 and 1010 in a 1:1 ratio.

[0043] The physical property test results of the TPE material for IC packaging tube sealing prepared in this embodiment are shown in Table 1, wherein the tensile strength is 14.7 MPa, the elongation at break is 575%, the Shore hardness is 87A, and the density is 0.96 g / cm 3 , the melt flow rate is 6.8g / 10min.

[0044] The aging test results show that at an irradiance of 1.05w / (m 2 .nm) @313nm, 4h drying (60℃) + 4h condensation (50℃), and 168h aging cycle, the yellowing value of the TPE material for IC packaging tube sealing prepared in this embodiment is 13.79, indicating that it has good yellowing resistance. Although it is not as good as Example 1, it can still resist yellowing caused by ultraviolet rays to a certain extent. This is because the addition amount of ultraviolet absorber and antioxidant is moderate, which can absorb ultraviolet light energy to a certain extent and protect the formulation system.

[0045] Example 5 Step 1, first weigh 35 parts of SEBS YH-602 rubber, 20 parts of PP T30S resin, 10 parts of mineral filler, namely calcium carbonate, 1.5 parts of lubricant, namely polyethylene wax, 0.2 parts of antioxidant compounded by 168 and 1010 in a ratio of 1:1, and 0.3 parts of UV-326 ultraviolet absorber according to weight parts, then put the weighed raw materials into a high-speed mixer and stir at a speed of 200 r / min for 5 minutes to obtain a mixture; Step 2, adding 25 parts of mineral oil, i.e., 2280 paraffin oil, weighed in parts by weight to the mixture obtained in step 1, and stirring in a high-speed mixer at a speed of 500 r / min for 10 minutes until the rubber completely absorbs the mineral oil, to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for sealing an IC packaging tube, and then drying and packaging.

[0046] The temperatures of the twin-screw extruder from zone 1 to zone 8 and the die head are: zone 1 temperature is 155°C, zone 2 temperature is 175°C, zone 3 temperature is 185°C, zone 4 temperature is 195°C, zone 5 temperature is 195°C, zone 6 temperature is 215°C, zone 7 temperature is 215°C, zone 8 temperature is 205°C, and the die head temperature is 185°C. The contents not mentioned in this embodiment are the same as those described in Example 1.

[0047] The physical property test results of the TPE material for IC packaging tube sealing prepared in this embodiment are shown in Table 1, wherein the tensile strength is 13.8 MPa, the elongation at break is 492%, the Shore hardness is 86A, and the density is 1.02 g / cm 3 , the melt flow rate is 5.3g / 10min.

[0048] The aging test results show that at an irradiance of 1.05w / (m 2 .nm) @313nm, 4h drying (60°C) + 4h condensation (50°C), and 168h aging cycle, the yellowing value of the TPE material for IC packaging tube sealing prepared in this embodiment is 21.7, indicating that its yellowing resistance is general. Compared with Example 1 and Example 2, its yellowing resistance is poor. This is because the reduction in resin content and the reduction in the content of ultraviolet absorber and antioxidant jointly affect the yellowing resistance of the material, causing it to show a higher yellowing value in the aging test.

[0049] Table 1 Physical properties test results of different embodiments

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A TPE material for sealing an IC packaging tube, characterized in that: The invention comprises the following raw materials in parts by weight: 25-35 parts of rubber, 25-35 parts of mineral oil, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of lubricant, 0.2-0.3 parts of antioxidant and 0.3-0.5 parts of ultraviolet absorber.

2. The TPE material for sealing an IC packaging tube according to claim 1, characterized in that: The rubber is a styrene-based elastomer SEBS or a styrene-based elastomer SBS; The SEBS is one of SEBS YH-501, SEBS YH-503, SEBS YH-563, SEBS YH-602, SEBS YH-604 and SEBS YH-688, or a mixture of more than one thereof; The SBS is one of YH-792E, YH-791E, YH-796E and YH788 or a mixture of more than one of them.

3. The TPE material for sealing an IC packaging tube according to claim 1, characterized in that: The mineral oil is naphthenic oil or paraffin oil.

4. The TPE material for sealing an IC packaging tube according to claim 1, characterized in that: The resin is polystyrene, polypropylene or polyethylene; the mineral filler is calcium carbonate or talcum powder.

5. The TPE material for sealing an IC packaging tube according to claim 1, characterized in that: The lubricant is polyethylene wax or erucamide.

6. The TPE material for sealing an IC packaging tube according to claim 1, characterized in that: The antioxidant is a mixture of 168 and 1010 in a ratio of 1:1 or 1:

2.

7. The TPE material for sealing an IC packaging tube according to claim 1, characterized in that: The ultraviolet absorber is one of UV-531, UV-326 and UV-327 or a mixture of more than one of them.

8. A method for preparing the TPE material for IC packaging tube sealing according to claims 1-7, characterized in that: The following steps are involved: Step 1, weighing raw materials according to weight: 25-35 parts of rubber, 20-30 parts of resin, 5-15 parts of mineral filler, 1-1.5 parts of lubricant, 0.2-0.3 parts of antioxidant and 0.3-0.5 parts of ultraviolet absorber, and then putting the weighed raw materials into a high-speed mixer and stirring them evenly to obtain a mixture; Step 2, adding 25-35 parts of mineral oil to the above mixture, and mixing and stirring in a high-speed mixer until the rubber completely absorbs the mineral oil to obtain an oil-filled premix; Step 3, introducing the oil-filled premix obtained in step 2 into a conical feeding hopper, extruding and granulating through a twin-screw extruder to obtain a TPE material for IC packaging tube sealing, and finally drying and packaging.

9. The method for preparing a TPE material for sealing an IC packaging tube according to claim 8, characterized in that: In the step 1, the speed of the high-speed mixer is 100-300 r / min, and the stirring time is 1-5 min; in the step 2, the speed of the high-speed mixer is 400-600 r / min, and the stirring time is 10-15 min.

10. The method for preparing a TPE material for sealing an IC packaging tube according to claim 8, characterized in that: The twin-screw extruder has the following temperatures from zone 1 to zone 8 and the die head: The temperature of zone one is 155~165℃, the temperature of zone two is 175~185℃, the temperature of zone three is 185~195℃, the temperature of zone four is 195~205℃, the temperature of zone five is 195~205℃, the temperature of zone six is ​​215~225℃, the temperature of zone seven is 215~225℃, the temperature of zone eight is 205~215℃, and the temperature of the machine head is 185~195℃.

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