Film for a tyre inner liner and a production method therefor

An inner liner and tire technology, applied in special tires, tire parts, tires, etc., can solve the problem of not being able to fully maintain the air permeability of tire molding performance, reducing the thickness and weight of the inner liner, and low fatigue resistance, etc. problems, to achieve the effect of preventing low fuel efficiency and rollover accidents, excellent performance, and improving performance

Active Publication Date: 2013-02-13
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, conventionally known methods cannot sufficiently maintain the excellent air permeability and moldability of the tire while reducing the thickness and weight of the inner liner as desired
In addition, there are cases where the inner liner obtained using the conventional method is broken due to repeated deformation during tire production or during vehicle use, etc., undesirably resulting in low fatigue resistance

Method used

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  • Film for a tyre inner liner and a production method therefor
  • Film for a tyre inner liner and a production method therefor
  • Film for a tyre inner liner and a production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment and

[0093]

Embodiment 1

[0095]In order to polymerize the resin used for the inner liner film, a mixture containing 70wt% of ε-caprolactam and 30wt% of polyoxyethylene diamine (Mw. The acids were mixed, and the resulting mixture was melted at 100° C. for 30 minutes under a nitrogen atmosphere. Heat the molten solution at 250°C for 3 hours and pressurize to 8kg / cm 2 , kept at this pressure, and then decompressed to 1kg / cm over 1 hour 2 .

[0096] The product melted under reduced pressure was prepared into chips, and then the chips were extruded through a circular die at 260° C., thereby obtaining a 70 μm thick unstretched film for tire innerliners without performing a 30 m thick unstretched film. / min rate of stretching and heat treatment.

[0097] On the film for the inner liner, a resorcinol-formalin-latex (RFL)-based adhesive was applied to a thickness of 5 μm using a gravure coater, and dried at 150 °C for 1 min and reaction, thereby forming an adhesive layer.

[0098] The thickness of the fil...

Embodiment 2

[0100] A 70 μm thick unstretched film for a tire innerliner was prepared in the same manner as in Example 1 except that 60 wt % of ε-caprolactam and 40 wt % of polyoxyethylene diamine were mixed.

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Abstract

This invention relates to a film for a tire inner liner, which includes a copolymer including a polyamide-based segment and 5 / 50 wt% of a polyether-based segment relative to the total weight of the film, and has a thickness 30 / 300 [mu] m, and to a method of manufacturing the film for a tire inner liner, including polymerizing a polyamide-based resin or its precursor with 5 / 50 wt% of a polyether-based resin relative to the total weight of the film, thus preparing a copolymer, and melting and extruding the copolymer, thus forming a film.

Description

technical field [0001] The present invention relates to a film for a tire innerliner and a preparation method thereof, more particularly, to a film for a tire innerliner and a preparation method thereof, although the film for a tire innerliner It is thin, but can exhibit excellent airtightness, thereby enabling lightweight tires and vehicles with higher fuel efficiency, and also exhibits excellent molding properties during tire manufacturing. Background technique [0002] Tires support the load of the vehicle, absorb shocks from the road surface, and transmit the driving force or braking force of the vehicle on the ground. Typically, tires are formed from fiber / steel / rubber composite materials and are configured as figure 1 shown. [0003] The tread 1 is in contact with the road surface, exerts frictional force necessary for braking or driving, and must exhibit good wear resistance, high resistance to external impact, and low heat build-up. [0004] The body ply (or carca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08G69/40B29D30/30C08L77/00B60C5/14
CPCB29D2030/0682C08J5/18B29D30/0681C08J2377/06C08G69/40B60C5/14B60C1/0008C08L77/06
Inventor 郑一全玉花李相牧金基雄
Owner KOLON IND INC
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