CN211947387U

CN211947387U - Fabric structure for improving adhesive force between high-crimpness dipped canvas and rubber

Info

Publication number: CN211947387U
Application number: CN201922099265.2U
Authority: CN
Inventors: 薛晓波; 顾征宇; 李振韬
Original assignee: Wuxi Baoqiang Industrial Weaving Co ltd
Current assignee: Wuxi Baoqiang Industrial Weaving Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-11-17
Anticipated expiration: 2029-11-28

Abstract

The utility model relates to an improve fabric construction of high crimpness gumming canvas and rubber adhesion belongs to the technical field of fabrics for the industry. The fabric structure is composed of a plurality of repeated unit weaves, and each unit weave is formed by interweaving warp yarns and weft yarns; the warp yarns comprise two different warp yarns, namely surface layer warp yarns and inner layer warp yarns; the weft yarns comprise two weft yarns, namely surface weft yarns and inner weft yarns. The utility model discloses the adhesive force of polyester fiber gumming canvas and rubber has been improved when having guaranteed conveyer belt framework material possess high crimpness to alleviate the powerful loss of conveyer belt that the polyester fiber framework conveyer belt can cause because polyester fiber is by the aminolysis to a certain extent, improved the life of conveyer belt.

Description

Fabric structure for improving adhesive force between high-crimpness dipped canvas and rubber

Technical Field

The utility model relates to an improve fabric construction of high crimpness gumming canvas and rubber adhesion belongs to the technical field of fabrics for the industry.

Background

The high-crimpness conveying belt is widely applied to the cement industry, the power plant industry, the metallurgy industry and the steel industry, and the temperature of materials tends to be gradually increased along with the development of the industry, so that the requirement on the heat resistance of the conveying belt is higher.

The high-crimpness rubber conveyer belt consists of three parts, namely a dipped canvas, a covering layer and a rubberizing layer, wherein the dipped canvas is a framework material of the conveyer belt. The mechanical properties such as strength of the conveyor belt can be improved by the combination of the lower covering rubber integrated with the adhesive layer of the dipped canvas. When the device works, the power for driving the conveying belt is firstly transmitted to the framework material gumming canvas, and then the framework material drives the material through the upper covering glue adhered with the framework material. Therefore, the strength of the carcass material and the adhesion to rubber determine the performance and life of the belt. With the popularization of industrial production and the widening of the use field of the conveying belt, the conveying belt used in production equipment with a smaller roller diameter and in the production process of the multilayer heavy adhesive tape is bent and wrinkled in use, even the phenomena of delamination, belt breakage and the like occur in use, and the service life of the conveying belt is greatly reduced. With the increasingly mature canvas market in recent years, the requirements of customers on the framework material for the conveyer belt are higher and higher, and particularly, the requirements on the fatigue resistance, the wrinkle resistance and the service life of the conveyer belt are greatly improved.

Conventionally, a high-curvature conveyor belt is mainly made of polyester impregnated canvas, the adhesion between polyester materials and rubber is not ideal, and the fatal disadvantage of polyester is that the polyester can generate a chemical reaction called aminolysis with amine substances in rubber at high temperature, so that polyester fibers are aminolysis, and the surfaces of rubber and polyester canvas lose adhesion. If EPDM (ethylene-propylene-diene monomer) is vulcanized using a peroxide vulcanization accelerator DCP in order to provide heat resistance, decomposition of DCP results in a cumyl alcohol species which reacts with the polyester at elevated temperatures in a chemical reaction known as transesterification, which is known as alcoholysis of the polyester. The aminolysis and alcoholysis of the polyester can cause the strength of the polyester fiber to be greatly reduced, and can also cause the surface of the polyester to lose the adhesive force, thereby causing the damage of the conveyer belt and the failure of the use.

Nylon 66 fiber, which is a polyamide substance, is not aminolyzed at high temperature, so that nylon 66 fiber can have excellent adhesion to rubber. However, nylon 66 is very easy to elongate and deform at high temperature, and the use of nylon 66 is also restricted; the polyester has higher modulus and has the advantage of difficult elongation and deformation.

Disclosure of Invention

The utility model aims at overcoming above-mentioned weak point, providing a conveyer belt is with high crimpness gumming canvas fabric structure, it adopts nylon 66 and polyester mixed use, exerts respective advantage between the different fibre to improve the life of conveyer belt.

The technical scheme of the utility model, an improve high crimpness gumming canvas fabric structure, characterized by: the fabric structure is composed of a plurality of repeated unit weaves, and each unit weave is formed by interweaving warp yarns and weft yarns; the warp yarns comprise two different warp yarns, namely surface layer warp yarns and inner layer warp yarns; the weft yarns comprise two different weft yarns, namely surface weft yarns and inner weft yarns.

Further, the warp yarns in each unit weave comprise a first surface layer warp yarn, a second surface layer warp yarn, a third inner layer warp yarn and a fourth inner layer warp yarn; the weft yarns comprise first surface layer weft yarns, second surface layer weft yarns, third inner layer weft yarns and fourth inner layer weft yarns.

Furthermore, the first surface layer warp yarns are positioned below the third inner layer weft yarns and above the first surface layer weft yarns, the second surface layer weft yarns and the fourth inner layer weft yarns;

the second surface layer warp yarns are positioned above the third inner layer weft yarns and below the first surface layer weft yarns, the second surface layer weft yarns and the fourth inner layer weft yarns;

the third inner layer warp yarns are positioned above the third inner layer weft yarns and the second surface layer weft yarns and below the first surface layer weft yarns and the fourth inner layer weft yarns;

the fourth inner layer warp yarns are positioned below the third inner layer weft yarns and the first surface layer weft yarns and above the fourth inner layer weft yarns and the second surface layer weft yarns;

further, the surface layer warp yarns and the surface layer weft yarns are both nylon 66 industrial filaments; the inner layer warp is polyester industrial filament.

High crimpness conveyer belt, refer to the rubber conveyer belt who adopts the fabric as framework material.

The utility model has the advantages that: the utility model discloses guaranteeing to use the conveyer belt of gumming canvas has very high crimpness degree, avoided using in the production facility of less cylinder diameter and the conveyer belt that uses in the production process of multilayer heavy sticky tape is crooked in use and corrugates, phenomenon such as delaminating and breaking appear in use even simultaneously because the gumming canvas surface covers has about 75% nylon 66, can have fine adhesive force with rubber, and protruding woof junctional point has improved the contact area of gumming canvas surface and rubber, has improved the cohesion of gumming canvas and rubber in the unit area; the polyester of the inner layer is protected by the nylon 66, the aminolysis and alcoholysis speed of the polyester fiber is relieved, the service life of the conveyer belt is prolonged, a large number of connecting points exist in the warp and weft on the surface layer, and under the high-temperature working condition, even if the polyester fiber is damaged after aminolysis, the interweaving structure of the nylon 66 can still provide certain strength and adhesive force with rubber, so that the safety of the conveyer belt under the high-temperature working condition is greatly improved.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of the present invention.

Fig. 2 is a schematic view of the knitting structure of the present invention.

Description of reference numerals: A. inner layer warp yarns, B and surface layer warp yarns; C. surface weft yarns; D. the inner layer weft yarns; 1. a first surface layer warp yarn; 2. a second surface layer warp yarn; 3. a third inner warp yarn; 4. a fourth inner warp yarn; a. A third inner weft yarn; b. a first surface layer weft yarn; c. a fourth inner weft yarn; d. and a second surface layer weft yarn.

Detailed Description

Nylon 66 industrial filaments in the following examples were purchased from the south of the river, ama group ltd; the polyester industrial filaments were purchased from new fibers, Inc. of Ufugao, Zhejiang.

As shown in fig. 1-2, a fabric structure of a dipped canvas for a heat-resistant conveyer belt of a fabric core is composed of a plurality of repeated unit tissues, and each unit tissue is formed by interweaving warp yarns and weft yarns; the warp yarns comprise two different warp yarns, namely inner layer warp yarns A and surface layer warp yarns B; the weft yarns comprise two different weft yarns, namely a surface layer weft yarn C and an inner layer weft yarn D.

The warp yarns in each unit weave comprise a first surface layer warp yarn 1, a second surface layer warp yarn 2, a third surface layer warp yarn 3, a fourth surface layer warp yarn 4, a first surface layer weft yarn b, a second surface layer weft yarn d, a third inner layer weft yarn a and a fourth inner layer weft yarn c.

The first surface layer warp 1 is positioned below the third inner layer weft a and above the first surface layer weft b, the second surface layer weft d and the fourth inner layer weft c;

the second surface layer warp 2 is positioned above the third inner layer weft a and below the first surface layer weft b, the second surface layer weft d and the fourth inner layer weft c;

the third inner layer warp 3 is positioned above the third inner layer weft a and the second surface layer weft d and below the first surface layer b weft and the fourth inner layer weft c;

the fourth inner warp yarns 4 are positioned below the third inner weft yarns a and the first surface weft yarns b and above the fourth inner weft yarns c and the second surface weft yarns d.

The preparation process of the gum dipping canvas adopting the gum dipping canvas fabric structure of the fabric core heat-resisting conveyer belt comprises the following steps:

(1) twisting nylon 66 industrial filament with the total fineness of 3300 dtex into yarn with the twist of 70-120 twists/meter and the twist direction S or Z, and taking the yarn as surface layer warp yarn A;

twisting polyester industrial filaments with the total fineness of 4200dtex into yarns with the twist of 70-120 twists/m in the twisting direction S or Z to serve as inner layer warp yarns B;

nylon 66 industrial filament with the total fineness of 2800 dtex is twisted into yarn with 70-120 twists/m and twisting direction S or Z, and the yarn is used as weft yarn C

Nylon 66 industrial filament with the total fineness of 1870 dtex is twisted into yarn with 70-120 twists/m and twisting direction S or Z twist, and the yarn is used as weft yarn D.

(2) Warping the warp into warp beams or using creels to let off the warp. The loom adopts double-warp beam let-off, wherein the surface layer warp yarn A and the inner layer warp yarn B are respectively provided with a set of let-off system; spinning according to the structure shown in figure 2;

(3) performing gum dipping heat treatment on the woven fabric obtained in the step (2); adopting single-bath dipping treatment, wherein the dipping solution adopts the published and commonly used dipping solution for treating nylon dipped cord fabric and nylon dipped canvas, and the dipping process comprises the following steps: the front drying temperature is 100-: 130-150 ℃, the stretching temperature is 180-210 ℃, the tentering setting temperature is 180 ℃, the maximum gum dipping tension is 100 times of the weight of each meter of the canvas, and the canvas is sealed and packaged by black plastic paper after gum dipping.

The density of the surface layer warp yarn A in the finished product is 120/10 cm, the density of the lining warp yarn B is 90/10 cm, the density of the surface layer weft yarn is 40/10 cm, and the density of the lining weft yarn is 80/10 cm.

The utility model has the advantages as follows:

the middle layer is of a plain weave structure, and the gum dipped canvas has high crimpness.

Secondly, the proportion of warp yarns covering nylon 66 industrial filaments on the front and back surfaces of the dipped canvas is increased, the contact area between the dipped canvas and rubber is increased by the raised surface weft yarn junction points, and the adhesive force between the rubber and the canvas is ensured in the high-temperature working condition operation of the conveyer belt by utilizing the characteristic that the rubber can be bonded with the nylon 66 industrial filament warp yarns in the canvas and the nylon 66 cannot be aminolyzed by the rubber at high temperature.

The polyester fiber is positioned in the middle of the canvas and is covered by the nylon 66, so that the polyester fiber is not easily influenced by amines and alcohols possibly existing in rubber, the degradation of the polyester fiber can be reduced, the purpose of protecting the polyester fiber in the gum dipping canvas is achieved, and the aminolysis speed of the polyester fiber under the high-temperature working condition is slowed down.

And fourthly, heating the dipped canvas to be higher than 150 ℃, and making the initial modulus of the polyester fiber warp yarn be 3-4 times higher than that of the nylon 66 warp yarn, so that the conveyer belt is not easy to creep and extend after being heated, thereby solving the problem of creep and extension of the nylon 66 conveyer belt under a high-temperature working condition.

Claims

1. A fabric structure for improving the adhesive force between high-crimpness dipped canvas and rubber is characterized in that: the fabric structure is composed of a plurality of repeated unit weaves, and each unit weave is formed by interweaving warp yarns and weft yarns; the warp yarns comprise two different warp yarns, namely surface layer warp yarns and inner layer warp yarns; the weft yarns comprise two weft yarns, namely surface weft yarns and inner weft yarns.

2. The fabric structure for improving the adhesion between the high-crimpability dipped canvas and the rubber as claimed in claim 1, wherein: the warp yarns in each unit weave comprise first surface layer warp yarns, second surface layer warp yarns, third inner layer warp yarns and fourth inner layer warp yarns; the weft yarns comprise first surface layer weft yarns, second surface layer weft yarns, third inner layer weft yarns and fourth inner layer weft yarns.

3. The fabric structure for improving the adhesion between the high-crimpability dipped canvas and the rubber as claimed in claim 2, wherein:

the first surface layer warp yarns are positioned below the third inner layer weft yarns and above the first surface layer weft yarns, the second surface layer weft yarns and the fourth inner layer weft yarns;

the fourth inner layer warp yarns are positioned below the third inner layer weft yarns and the first surface layer weft yarns and above the fourth inner layer weft yarns and the second surface layer weft yarns.

4. The fabric structure for improving the adhesion between the high-crimpability dipped canvas and the rubber as claimed in claim 1, wherein: the surface layer warp yarns and the surface layer weft yarns are both nylon 66 industrial filaments; the inner layer warp is polyester industrial filament.