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Manufacturing method of pneumatic tire
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A manufacturing method and technology of pneumatic tires, applied in the direction of pneumatic tires, tire parts, tires, etc., can solve problems such as peeling, and achieve the effect of excellent durability
Inactive Publication Date: 2015-12-02
THE YOKOHAMA RUBBER CO LTD
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[0005] However, after the laminate sheet composed of the thermoplastic resin or the thermoplastic resin composition obtained by mixing the thermoplastic resin and the elastomer and the joint rubber layer is rolled into a roll, the roll Pull out the required length part and cut it, roll it on the tire forming drum, overlap and splice it on the drum, etc., and perform vulcanization molding to form a tire, sometimes it occurs when the tire inner liner is formed after starting to drive Delamination occurs between the thermoplastic resin or thermoplastic resin composition sheet of the layer and the bonding rubber sheet vulcanized and bonded to the thermoplastic resin or the thermoplastic resin composition sheet
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Embodiment 1、 Embodiment 2
[0066] Embodiment 1, embodiment 2, comparative example 1, comparative example 2
[0067] In Example 1 and Comparative Example 1, a thermoplastic resin sheet of N6 / 66 copolymer having a thickness of 130 μm was used as the thermoplastic resin constituting the inner liner and the thermoplastic resin composition sheet.
[0068] Similarly, in Example 2 and Comparative Example 2 (as shown in Table 1), a thermoplastic resin composition in which N6 / 66 copolymer as a thermoplastic resin and BIMS as an elastomer were blended at 50 / 50 was used. Sheets with a thickness of 130 μm.
[0069] The N6 / 66 copolymers used all had a melting point of 195°C.
[0070] Using a blunt tool with a blade thickness of 0.3mm at a distance of 0.1mm from the tip, at a temperature of 130°C, such as Figure 4 As shown in (C), the single sheets of Examples 1 and 2 were cut into predetermined lengths from the vertical direction.
[0071] In Comparative Example 1 to Comparative Example 2, using a tool processed...
Embodiment 3、4
[0077] Embodiment 3,4, comparative example 3,4
[0078] As for the thermoplastic resin and the thermoplastic resin composition sheet constituting the inner liner, in Example 3 and Comparative Example 3, a thermoplastic resin sheet of N6 / 66 copolymer having a thickness of 130 μm was used.
[0079] Similarly, in Example 4 and Comparative Example 4 (as shown in Table 1), a thermoplastic resin composition in which N6 / N66 copolymer as a thermoplastic resin and BIMS as an elastomer were blended at 50 / 50 was used. Sheets with a thickness of 130 μm.
[0080] The N6 / 66 copolymers used all had a melting point of 195°C.
[0081] The joint rubber constituting the inner liner also has the composition shown in Table 2 and has a thickness of 0.7 mm. A laminated sheet obtained by laminating these thermoplastic resin or thermoplastic resin composition sheets and the bonding rubber layer was prepared as the roll wound body.
[0082] When the laminate sheet is overlapped and spliced, rolled o...
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Abstract
The present invention provides a method of manufacturing a pneumatic tire which includes an inner liner layer formed of a laminated sheet obtained by laminating: a sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer; and rubber cured and adhered to the thermoplastic resin or the thermoplastic resin composition and in which no crack develops around a splice portion of the inner liner layer after the start of usage for running, the pneumatic tire thereby being excellent in durability. The method of manufacturing a pneumatic tire uses the laminated sheet having a predetermined length and the inner liner layer is formed from the laminated sheet through a step of cure-molding the tire with end portions of the laminated sheet lap-spliced. In the method, when at least the sheet made of the thermoplastic resin or the thermoplastic resin composition obtained by blending the thermoplastic resin and the elastomer is cut into the predetermined length, the cutting is performed by using an edge tool having a non-sharp edge under a temperature condition not lower than 60°C and not higher than a melting point of the thermoplastic resin.
Description
technical field [0001] The invention relates to a method for manufacturing a pneumatic tire. [0002] More specifically, the present invention relates to a method for producing a pneumatic tire using a sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by mixing a thermoplastic resin and an elastomer and combining the thermoplastic resin or the thermoplastic resin A laminated sheet having a predetermined length formed by laminating two rubbers bonded together by vulcanization, after the process of vulcanizing and molding the tire in a state where the ends of the sheets are overlapped and spliced, the The laminate sheet forms an inner liner, and the resulting pneumatic tire has excellent durability without cracks near the spliced portion of the spliced laminate sheet (inner liner) after the start of running. Background technique [0003] In recent years, there have been literatures proposing a plan to use a thin plate made of a thermoplasti...
Claims
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