CN116729027A - Tire with single-layer lining structure and preparation method - Google Patents

Abstract

The application belongs to the application field of industries such as tires, rubber and the like, and particularly relates to a tire with a single-layer lining structure and a preparation method thereof. The tire comprises a single-layer lining structure, a ply, triangular rubber, sidewall rubber, a first belt ply, a second belt ply, a cap ply and tread rubber which are sequentially arranged from bottom to top; wherein the lining structure comprises a sub-mouth outer protective film, an airtight layer and an isolation film; the sub-mouth outer protective film and the isolation film are respectively arranged at two sides of the air-tight layer; wherein, the sub-mouth outer protective film is provided with two groups and is respectively attached to two ends of one side of the air-tight layer; the isolation films are also provided with two groups, and the two groups of isolation films are symmetrically arranged on the other side of the air-tight layer by taking the axis vertical to the center point of the air-tight layer as a symmetrical axis. The tire adopts a single-layer lining structure, so that the production efficiency can be improved, the material cost can be saved, appearance defects such as bubbles in the tire, lack of glue and the like can be reduced, the rolling resistance can be effectively reduced, and the fuel economy of the tire can be improved.

Description

Tire with single-layer lining structure and preparation method

Technical Field

The application belongs to the application field of industries such as tires, rubber and the like, and particularly relates to a tire with a single-layer lining structure and a preparation method thereof.

Background

The lightweight tire with the main characteristics of energy conservation, environmental protection, safety and high efficiency is one development direction of the current tire industry. Under the adverse effects of high raw material prices and the like caused by the shortage of the postepidemic market and international local situation, the weight of the tire is lightened, the manufacturing technical level of the tire can be clearly embodied, and the tire is an effective way for enterprises to reduce the production cost and improve the competitiveness.

The tire inner liner is used in a tubeless tire and is the inner layer of the tubeless tire. The current traditional design of radial tire innerliners in the industry is to use a double layer innerliner design (innerliner + transition layer). Wherein the inner liner ensures a tire having an extremely low air pressure loss rate; the transition layer mainly plays a role in buffering and bonding. The inner liner is compounded by two transition layers and very wide air-tight layers, air bubbles are easy to clamp during lamination, and are not easy to discharge during vulcanization, so that air bubbles between finished tire layers are caused, and waste and defective products are generated. In addition, the design increases the types of sizing materials used, and reduces the production efficiency to a certain extent.

The prior lining layer composite part comprises an airtight layer, a transition layer and a sub-mouth outer protective film, and the lining layer composite part is attached to an attaching drum and then is directly attached to a ply composite part (a ply and an isolation film) of a traditional design. In the use process of an actual ply composite, the quality condition of tire cavity bubbles generated by the non-compact lamination of the isolation film often occurs because the isolation film and the carcass ply belong to a cold lamination mode; in order to increase the exhaust effect of the curtain cloth layer by layer, a punching process is carried out after the isolation film is attached to the curtain cloth layer by layer, and once the punching is bigger, lining sizing materials can permeate into holes to cause the defect of the quality of the lack of the sizing materials in the tire.

Disclosure of Invention

In order to solve the technical problems, the application aims to provide a tire with a single-layer lining structure and a preparation method thereof, wherein the tire adopts the single-layer lining structure, so that the production efficiency can be improved, the material cost can be saved, appearance defects such as bubbles in the tire cavity, lack of glue and the like can be reduced, the rolling resistance can be effectively reduced, and the fuel economy of the tire can be improved.

In order to achieve the above purpose, the present application adopts the following technical scheme:

a tyre with a single-layer lining structure comprises a single-layer lining structure, a ply, a triangular rubber, a sidewall rubber, a first belt ply, a second belt ply, a cap ply and tread rubber which are sequentially arranged from bottom to top;

the single-layer lining structure comprises a sub-mouth outer protective film, an airtight layer and an isolation film; the sub-mouth outer protective film and the isolation film are respectively arranged at two sides of the air-tight layer; wherein, the sub-mouth outer protective film is provided with two groups and is respectively attached to two ends of one side of the air-tight layer; the isolation films are also provided with two groups, and the two groups of isolation films are symmetrically arranged on the other side of the air-tight layer by taking the axis vertical to the center point of the air-tight layer as a symmetrical axis.

Preferably, the left end and the right end of the single-layer lining structure are symmetrical, and the symmetrical axis is an axis vertical to the center point of the single-layer lining structure.

Preferably, the thickness of the sub-mouth outer protective film is 1.5mm-2mm, and the width is 30mm-45mm.

Preferably, the thickness of the inner liner is 1.0mm-1.8mm.

Preferably, the thickness of the isolation film is 0.3mm-0.5mm, and the width is 40mm-60mm.

Preferably, the spacing between two isolation films symmetrically arranged is 70mm-260mm.

Preferably, the isolation film is attached to the tire shoulder position, and the composite difference level of the isolation film and the first belt layer is 15mm-25mm.

Preferably, the sub-mouth outer protective films arranged on the two ends of the air-tight layer extend out of the air-tight layer leftwards and rightwards respectively, and the composite difference level of the sub-mouth outer protective films and the air-tight layer is 15mm-20mm.

A second object of the present application is to provide a method for producing a tire of a single-layer liner structure, comprising the steps of:

s1, setting a group of calenders, and respectively calendering an air-tight layer, an isolation film and a sub-mouth outer protective film through the calenders;

s2, fixing two groups of isolation films on one side of the air-tight layer by using a calender, and compositing the isolation films and the air-tight layer; wherein, the two groups of isolation films are bilaterally symmetrical, and the symmetry axis is an axis which is vertical to the center point of the air-tight layer;

s3, using a calender again, and attaching the combined airtight layer and isolation film with the two groups of seam allowance outer protective films to form a single-layer lining structure; wherein, two groups of sub-mouth outer protective films are respectively fixed on two ends of the other side of the air-tight layer, and both groups of sub-mouth outer protective films extend out of the end parts of the air-tight layer;

s4, setting a group of laminating drums, setting the laminating drums as bases, setting a single-layer lining structure, a ply and a triangular glue on the laminating drums, performing compression molding, and then performing reverse packaging treatment on the single-layer lining structure, the ply and the triangular glue; after the turn-up treatment is completed, the single-layer lining structure, the ply layers and the triangular glue are combined to form a turn-up assembly;

s5, sequentially attaching the turn-up assembly, the sidewall rubber, the first belt layer, the second belt layer, the cap ply and the tread rubber to an attaching drum to enable the turn-up assembly, the sidewall rubber, the first belt layer, the second belt layer, the cap ply and the tread rubber to be combined to form a tire embryo;

and S6, performing high-temperature and high-pressure treatment on the tire embryo to finally form the tire.

Due to the adoption of the technical scheme, the single-layer lining structure eliminates the traditional transition layer design, reduces the types of sizing materials used by the tire, and improves the production efficiency; the single-layer lining structure can also reduce the weight of the tire and improve the performance of the tire; meanwhile, the existing lining production line is modified, so that the automatic attaching of the isolation films can be realized, the cost investment is saved, and appearance defects such as bubbles in the tire, lack of glue and the like are reduced.

Drawings

FIG. 1 is a schematic view of the tire;

FIG. 2 is a schematic view of a conventional double layer liner;

FIG. 3 is a schematic view of a single layer liner according to an embodiment of the present application;

FIG. 4 is a schematic perspective view of a conventional ply composite perforated;

FIG. 5 is a schematic perspective view of a perforation using a ply according to an embodiment of the application;

reference numerals: 1. a laminating drum; 2. a sub-mouth outer protective film; 3. an airtight layer; 4. a transition layer; 5. isolating the film; 6. a ply layer; 7. triangular glue; 8. a sidewall rubber; 9. a first belt layer; 10. a second belt layer; 11. a cap ply; 12. tread rubber; 13. a needle.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

At the same time, it should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The following describes the embodiments of the present application in detail with reference to the drawings.

As shown in fig. 1 to 5, the tire is based on a fitting drum 1 at the time of molding, and the tire includes a single-layer inner liner structure, a ply layer 6, a apex 7, a sidewall rubber 8, a first belt layer 9, a second belt layer, 10 cap ply layers 11, and tread rubber 12 which are sequentially attached to the fitting drum 1; wherein the order of single-layer lining structure is laminating two sets of sub-mouth outer protective film 2 earlier in the installation, and then laminating inner liner 3 on sub-mouth outer protective film 2 through the mode of tiling, and the both ends of inner liner 3 laminate on sub-mouth outer protective film 2, the compound difference level between sub-mouth outer protective film 2 and the inner liner 3 is 15mm-20mm, follow closely laminating two sets of isolation film 5 on the top of inner liner 3, two sets of isolation film 5 carry out the symmetry setting with the central point axis of vertical perpendicular to inner liner 3 as the symmetry axle, and the interval between two isolation film 5 of symmetry setting is set up its scope at 70mm-260mm according to the size of tire.

The inner liner 3 and the isolation film 5 are compounded together through a calender, and then the calender is used for laminating the inner liner 3 and the isolation film 5 which are compounded together and the sub-mouth outer protective film 2 together to form an inner liner compound piece, wherein the inner liner compound piece is of a single-layer inner liner structure. The glue supplying machine adopted by the single-layer lining structure is a calender for supplying glue, and the calender can respectively press the air-tight layer 3, the isolation film 5 and the sub-mouth outer protective film 2.

When the isolation film 5 is attached, the isolation film 5 is positioned at the shoulder of the tire, and the composite difference level of the isolation film 5 and the first belt layer 9 is 15mm-25mm.

Wherein the thickness of the sub-mouth outer protective film 2 is 1.5mm-2mm, and the width is 30mm-45mm. The thickness of the inner liner 3 is 1.0mm-1.8mm. The thickness of the isolation film 5 is 0.3mm-0.5mm, and the width is 40mm-60mm.

The traditional double-layer lining has a structure that a transition layer 4 is attached between an airtight layer 3 and an isolation film 5; compared with the traditional double-layer lining structure, the lining structure eliminates the transition layer 4, so that the airtight layer 3 and the isolation film 5 are directly attached.

The sub-mouth outer protective film 2, the airtight layer 3 and the isolation film 5 of the single-layer lining structure are of an integrated structure, the process is simple, the convenience of operation is improved, and the production efficiency is improved.

The molding machine presses the inner liner composite, the ply 6 and the apex 7 to perform reverse wrapping treatment, then presses the inner liner composite, the ply 6 and the apex 7 with the sidewall to form a tire blank, and finally presses the tire blank with the belt ply, the crown band and the tire tread.

It should be noted that the solution of the above preferred embodiment is only one specific implementation manner provided by the present application, and those skilled in the art may select the sizing material or the material for making the film layer according to the actual situation, where the sizing material and the material are different, and the viscosity and the function of the film layer are also changed, which does not affect the protection scope of the present application.

Because the carcass ply 6 has a phenomenon of cord deviation or cord sparseness during tire building and vulcanization, and the tire inner liner is a thin plain film, the rubber material flows more easily during vulcanization, and the uneven thickness is caused. In order to eliminate such disadvantages and improve the quality of the tire, the rubber curtain cloth and the inner liner can be subjected to electron beam irradiation treatment by using an electron beam irradiation system. The irradiation treatment in the above embodiment can significantly improve the quality of the inner liner layer, the ply 6.

The isolation film 5 of the traditional design is attached to the ply 6, and because the isolation film 5 and the ply belong to a cold attaching mode, the quality condition of tire cavity bubbles generated by the fact that the isolation film 5 is not tightly attached often occurs; in addition, in order to increase the exhaust effect in the preparation process, the puncture needles 13 are used for perforating the carcass ply 6, and after the ply 6 is attached to the isolation film 5, pinholes on the film are larger, and the airtight layer 3 in the tire inner liner is a thin film, so that the problem of appearance adhesive shortage caused by adhesive seepage into holes is more likely to occur in the vulcanization process.

In order to eliminate the defects, improve the quality of the tire, cancel the isolation film 5 on the ply 6, and modify the lining calender, so that the inner liner 3 and the isolation film 5 can be simultaneously calendered by the calender, firstly, the process belongs to a hot sticking mode, the isolation film 5 and the inner liner 3 film are in perfect contact and adhesion, the influence of bubbles is eliminated, secondly, the isolation film 5 is not perforated by the pricking needles 13, and the problem of adhesive shortage caused by the penetration of the lining into holes is avoided. And the transition layer is eliminated, so that the tire cost can be effectively saved. The change in the process of passing through the separator film 5 in the above embodiment can significantly improve the quality of the tire appearance.

The single-layer inner liner structure design of the tire can be applied to a semisteel radial tire.

Wherein the comparative example is a double-layer innerliner tire and the example is a single-layer innerliner tire. The tires were subjected to indoor performance tests according to the related national standard test methods, the high-speed durability was up to standard, the rolling resistance of the examples was reduced compared with that of the comparative examples, all test results were calculated based on the comparative examples as 100, the test values (relative values) =example test values/comparative example test values×100, the specific measurement results are shown in table 1, the tires with the specifications of 205/55R16 were manufactured, and the performances in the test chambers and the rolling resistance and wet grip performance of the real vehicles were measured, specifically compared with the following tables:

table 1 shows the comparative performance of the comparative and example indoor tests

Physical Properties	Comparative example	Examples
			Weight of tyre	100	98
High speed performance	100	100
			Durability performance	100	101
Rolling resistance	100	97
			Air tightness properties	100	100

In table 1 above, the tire weights: the smaller the value, the lower the tire production cost, the rolling resistance performance: the smaller the value, the lower the rolling resistance.

As can be seen from the comparison of the comparative example and the example, the single-layer liner design case combines high-speed durability and air tightness; the rolling resistance performance is improved slightly; the production cost is slightly reduced.

The preparation method of the tire comprises the following steps:

s1, a group of calenders are arranged, and an air-tight layer 3, an isolation film 5 and a sub-mouth outer protective film 2 are respectively calendered through the calenders;

s2, two groups of isolation films 5 are fixed on one side of the air-tight layer 3 by using a calender, so that the isolation films 5 and the air-tight layer 3 are compounded together; wherein, the two groups of isolation films 5 are bilaterally symmetrical, and the symmetry axis is an axis which is vertical to the center point of the air-tight layer 3;

s3, using a calender again, and attaching the combined airtight layer 3 and isolation film 5 with the two groups of sub-mouth outer protective films 2 to form a single-layer lining structure; wherein, two groups of sub-mouth outer protective films 2 are respectively fixed on two ends of the other side of the air-tight layer 3, and the two groups of sub-mouth outer protective films 2 extend out of the end part of the air-tight layer 3;

s4, arranging a group of laminating drums 1, arranging the laminating drums 1 as a base, arranging a single-layer lining structure, a ply 6 and a triangular glue 7 on the laminating drums 1, pressing and forming, and then carrying out reverse packaging treatment on the three; after the turn-up treatment is completed, the single-layer lining structure, the ply 6 and the apex 7 are combined to form a turn-up assembly;

s5, sequentially attaching the turn-up assembly, the sidewall rubber 8, the first belt layer 9, the second belt layer 10, the cap ply 11 and the tread rubber 12 to the attaching drum 1 to enable the turn-up assembly, the sidewall rubber 8, the cap ply 11 and the tread rubber 12 to be combined to form a tire embryo;

and S6, performing high-temperature and high-pressure treatment on the tire embryo to finally form the tire.

It should be understood that, although the steps in the flowcharts of the embodiments of the present application are sequentially shown in the above-described sequence, the steps are not necessarily sequentially performed in the order indicated by the sequence. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed need to be sequential, but may be performed in rotation or alternating with at least a portion of the sub-steps or stages of other steps or steps.

As will be appreciated by those of ordinary skill in the art: the above is only a preferred embodiment of the present application, and the present application is not limited thereto, but it is to be understood that the present application is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The tire with the single-layer lining structure is characterized by comprising the single-layer lining structure, a ply (6), a apex (7), a sidewall rubber (8), a first belt layer (9), a second belt layer (10), a cap ply (11) and a tread rubber (12) which are sequentially arranged from bottom to top;

the single-layer lining structure comprises a sub-mouth outer protective film (2), an airtight layer (3) and an isolation film (5); the sub-mouth outer protective film (2) and the isolation film (5) are respectively arranged at two sides of the airtight layer (3); wherein, the sub-mouth outer protective film (2) is provided with two groups and is respectively attached to two ends of one side of the airtight layer (3); the two groups of isolation films (5) are also arranged, and the two groups of isolation films (5) are symmetrically arranged on the other side of the air-tight layer (3) by taking the axis vertical to the center point of the air-tight layer (3) as a symmetry axis.

2. The tire of claim 1 wherein the single layer liner is symmetrical about an axis perpendicular to its center point.

3. Tyre of single-ply inner liner structure according to claim 2, characterized in that the thickness of the sub-mouth outer skin-care sheet (2) is 1.5mm-2mm and the width is 30mm-45mm.

4. Tyre of single-layer liner structure according to claim 2, wherein the thickness of the inner liner (3) is 1.0mm-1.8mm.

5. Tyre of single-ply innerliner construction according to claim 2, wherein the thickness of the separator film (5) is 0.3mm-0.5mm and the width is 40mm-60mm.

6. Tyre of single-layer liner structure according to claim 1 or 5, characterized in that the spacing between two isolation films (5) arranged symmetrically is 70-260 mm.

7. Tyre of single-ply inner liner structure according to claim 6, characterized in that the separator film (5) is applied in the tyre shoulder position and the composite difference between the separator film (5) and the first belt layer (9) is 15-25 mm.

8. Tyre of single-layer inner liner structure according to claim 1, characterized in that the bead sheets (2) arranged on both ends of the inner liner (3) extend out of the inner liner (3) to the left and right, respectively, and that the composite difference between the bead sheets (2) and the inner liner (3) is 15-20 mm.

9. A process for the preparation of a tyre as claimed in anyone of claims 1 to 8, characterized in that it comprises the steps of:

s1, a group of calenders are arranged, and an airtight layer (3), an isolation film (5) and a sub-mouth outer protective film (2) are respectively calendered through the calenders;

s2, two groups of isolation films (5) are fixed on one side of the air-tight layer (3) by using a calender, so that the isolation films (5) and the air-tight layer (3) are compounded together; wherein, the two groups of isolation films (5) are bilaterally symmetrical, and the symmetry axis is an axis which is vertical to the center point of the airtight layer (3);

s3, using a calender again, and attaching the combined airtight layer (3) and the combined isolation film (5) with the two groups of sub-mouth outer protective films (2) to form a single-layer lining structure; wherein, two groups of sub-mouth outer protective films (2) are respectively fixed on two ends of the other side of the air-tight layer (3), and the two groups of sub-mouth outer protective films (2) extend out of the end parts of the air-tight layer (3);

s4, arranging a group of laminating drums (1), arranging the laminating drums (1) as a base, arranging a single-layer lining structure, a ply (6) and a triangular glue (7) on the laminating drums (1), pressing and forming, and then carrying out reverse packaging treatment on the three; after the turn-up treatment is completed, the single-layer lining structure, the ply (6) and the triangular glue (7) are combined to form a turn-up assembly;

s5, sequentially attaching the turn-up assembly, the sidewall rubber (8), the first belt ply (9), the second belt ply (10), the cap ply (11) and the tread rubber (12) to the attaching drum (1) to enable the assembly to form a tire embryo;

and S6, performing high-temperature and high-pressure treatment on the tire embryo to finally form the tire.