High-temperature-resistant strippable cloth as well as preparation method and application thereof

Abstract

The invention provides high-temperature-resistant peelable cloth and a preparation method and application thereof.The high-temperature-resistant peelable cloth is obtained by weaving warp yarn and weft yarn, the warp yarn and the weft yarn are skin-core yarn, the skin layer of the skin-core yarn is PFA resin, and the core layer of the skin-core yarn is glass fiber yarn; the skin-core yarn with the skin layer made of the PFA resin and the core layer made of the glass fiber yarn is adopted as the warp yarn and the weft yarn at the same time, the high temperature resistance and the corrosion resistance of the strippable cloth obtained through weaving are effectively improved, and the obtained strippable cloth further has a release effect, is used for processing and forming of the composite material, is easily stripped from the composite material, and has a good application prospect. Furthermore, no fiber remains on the surface of the workpiece, so that the flatness of the obtained workpiece is good; and meanwhile, the obtained strippable cloth also has certain plasticity, can be preheated and shaped according to the shape of a mold before being used, and is particularly suitable for being applied to processing and forming of special-shaped parts.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material molding, and particularly relates to a high-temperature resistant peelable cloth and a preparation method and application thereof. Background Art

[0002] Composite materials are widely used in aerospace parts. Because the structure of spacecraft is complex and diverse, structural adhesives are often needed for bonding. Therefore, a certain degree of roughness needs to be formed on the surface of the composite material to improve the bonding strength of the parts. Therefore, peelable cloth is often needed in the composite material molding process.

[0003] At present, conventional peelable fabrics on the market are woven from polyester fibers or nylon fibers. For example, CN213476231U discloses an antistatic peelable fabric for wind turbine blade molding, comprising a composite warp yarn and a composite weft yarn, wherein the composite warp yarn comprises a nylon high-strength industrial silk warp yarn, a conductive warp yarn and a polyester high-strength industrial silk warp yarn arranged side by side, wherein the conductive warp yarn is located between the nylon high-strength industrial silk warp yarn and the polyester high-strength industrial silk warp yarn, and the composite weft yarn comprises a nylon high-strength industrial silk weft yarn, a conductive weft yarn and a polyester high-strength industrial silk weft yarn arranged side by side, wherein the conductive weft yarn is located between the nylon high-strength industrial silk weft yarn and the polyester high-strength industrial silk weft yarn, and wherein the conductive warp yarn and the conductive weft yarn comprise a core wire made of carbon fiber and polyester fiber coated outside the core wire.

[0004] However, the temperature resistance of conventional peelable fabrics is basically between 180 and 200°C, and they can only be used for curing and molding of medium and low temperature prepregs. In addition, since the peelable fabric itself is composed of fibers, epoxy resin and other impregnating materials can easily penetrate into the fibers of the peelable fabric, making it difficult to peel off.

[0005] Therefore, developing a peelable cloth that is resistant to high temperatures and easy to peel off is still a technical problem that urgently needs to be solved in this field. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a high-temperature resistant peelable cloth and a preparation method and application thereof. The high-temperature resistant peelable cloth can withstand a high temperature of 280°C, has excellent high-temperature resistance and corrosion resistance, and has a self-release effect, is easy to peel off from the composite material, and will not cause fiber residues on the surface of the workpiece, thereby making the resulting workpiece have good flatness; in addition, the high-temperature resistant peelable cloth also has a certain plasticity, and can be preheated and shaped according to the mold shape before use, and will not cause surface defects of the workpiece due to wrinkles in the peelable cloth. It is particularly suitable for use in the processing and forming of special-shaped parts.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a high temperature resistant peelable cloth, wherein the high temperature resistant peelable cloth is woven from warp yarns and weft yarns;

[0009] The warp yarn and the weft yarn are both sheath-core yarns, and the sheath layer of the sheath-core yarn is PFA resin, and the core layer is glass fiber yarn.

[0010] The high-temperature resistant peelable cloth provided by the present invention is obtained by weaving a sheath-core yarn core with a sheath layer of PFA resin and a core layer of glass fiber yarn as warp yarn and weft yarn at the same time; the PFA resin is used as the sheath material to effectively improve the high temperature resistance and corrosion resistance of the sheath-core yarn, so that the obtained peelable cloth also has excellent high temperature resistance and corrosion resistance, and can withstand a high temperature of 280°C; at the same time, different from the traditional twisting of multiple yarns, the surface of the sheath-core yarn is very smooth and flat, without pores, so that the obtained high-temperature resistant peelable cloth can have a self-release effect, and when used in composite material molding, the resin will not infiltrate into the fiber bundle, and it is easy to peel off the composite material, so that no fiber will remain on the surface of the product, so that the flatness of the produced product is good; in addition, the high-temperature resistant peelable cloth provided by the present invention also has a certain plasticity, and can be pre-heat-set according to the mold shape before use, avoiding the problem of wrinkles on the arc surface of ordinary peelable cloth causing surface defects of the product, and is particularly suitable for use in the processing and molding of special-shaped parts.

[0011] It should be noted that the "high temperature resistant peelable cloth" mentioned in the present invention refers to a peelable cloth that can withstand high temperatures of not less than 280°C, that is, there is no problem of melting or breaking after being treated at 280°C for 6 hours.

[0012] It should also be noted that, in the present invention, although the warp yarn and the weft yarn are both sheath-core yarns, and the sheath layer is PFA resin and the core layer is glass fiber yarn, it does not mean that the warp yarn and the weft yarn are exactly the same. For example, the melt index of the PFA resin used in the sheath layer and the core layer may be different, and the specifications of the glass fiber yarn used in the sheath layer and the core layer may also be different. For example, in the sheath-core yarn, the mass proportion of the sheath layer and the core layer may also be different.

[0013] In some preferred embodiments, the surface density of the high temperature resistant peelable fabric is 70 to 400 g / m 2 , for example 70g / m 2 , 100g / m 2 , 150g / m 2 , 200g / m 2 , 250g / m 2 , 300g / m 2 , 350g / m 2 or 400g / m 2 wait.

[0014] In some preferred embodiments, the thickness of the high temperature resistant peelable cloth is 0.06-0.2 mm, for example, 0.06 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm or 0.2 mm.

[0015] In some preferred embodiments, the warp density of the high temperature resistant peelable cloth is 170 to 480 strands / 10 cm, for example, 170 strands / 10 cm, 200 strands / 10 cm, 250 strands / 10 cm, 300 strands / 10 cm, 350 strands / 10 cm, 400 strands / 10 cm, 450 strands / 10 cm or 480 strands / 10 cm, etc.

[0016] In some preferred embodiments, the weft density of the high temperature resistant peelable cloth is 150 to 400 strands / 10 cm, for example, 150 strands / 10 cm, 200 strands / 10 cm, 250 strands / 10 cm, 300 strands / 10 cm, 350 strands / 10 cm or 400 strands / 10 cm.

[0017] In some preferred embodiments, the mass percentage of glass fiber filaments in the sheath-core yarn is 30-50%, for example, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48% or 50%, etc.

[0018] In some preferred embodiments, the mass percentage of PFA resin in the sheath-core yarn is 50-70%, for example, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68% or 70%, etc.

[0019] In some preferred embodiments, the glass fiber filaments include any one of D900 glass fiber filaments, D450 glass fiber filaments, or E225 glass fiber filaments, or a combination of at least two of them.

[0020] In some preferred embodiments, the melt index of the PFA resin is 8 to 30 g / 10 min, for example, 8 g / 10 min, 10 g / 10 min, 12 g / 10 min, 14 g / 10 min, 16 g / 10 min, 18 g / 10 min, 20 g / 10 min, 22 g / 10 min, 24 g / 10 min, 26 g / 10 min, 28 g / 10 min or 30 g / 10 min, etc.; the test temperature of the above melt index is 372° C. and the load is 5 kg.

[0021] In some preferred embodiments, the weaving structure is a plain weave or a twill weave.

[0022] In a second aspect, the present invention provides a method for preparing the high temperature resistant peelable cloth as described in the first aspect, the preparation method comprising the following steps:

[0023] (1) dipping glass fiber yarn into molten PFA resin, taking it out and cooling it to obtain a sheath-core yarn;

[0024] (2) Weaving the obtained core-sheath yarn as warp yarn and weft yarn to obtain the high-temperature resistant peelable cloth.

[0025] The step (1) of the method for preparing the high temperature resistant peelable cloth provided by the present invention is a continuous process, the glass fiber filaments are moving, and the cooling and shaping process is carried out in the mold, which can not only shape the PFA resin but also remove excess PFA impregnation liquid as needed.

[0026] In some preferred embodiments, step (2) further includes the step of warping using a warping machine before weaving.

[0027] In some preferred embodiments, the weaving in step (2) is performed on a rapier loom.

[0028] In some preferred embodiments, step (2) further includes a heat setting step after the weaving is completed.

[0029] In a third aspect, the present invention provides a use of the high temperature resistant peelable cloth as described in the first aspect in composite material molding.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The high temperature resistant peelable cloth provided by the present invention can withstand a high temperature of 280°C and has excellent corrosion resistance;

[0032] (2) The high temperature resistant peelable cloth provided by the present invention also has a self-release effect. When used in composite material molding, the resin will not infiltrate into the fiber bundle, and it is easy to peel off the composite material without causing fiber residue on the surface of the product, so that the flatness of the produced product is good;

[0033] (3) The high-temperature resistant peelable cloth provided by the present invention also has a certain plasticity and can be pre-heat-set according to the mold shape before use, thereby avoiding the generation of wrinkles on the curved surface of ordinary peelable cloth, which leads to surface defects of the workpiece, and is suitable for the processing and preparation of special-shaped parts. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0035] Example 1

[0036] A high temperature resistant peelable cloth with a thickness of 0.06mm and a surface density of 100g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 275 yarns / 10cm, and the weft density is 275 yarns / 10cm;

[0037] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D900 glass fiber yarn;

[0038] The method for preparing the high temperature resistant peelable cloth provided in this embodiment comprises the following steps:

[0039] (1) D900 glass fiber yarn is impregnated in molten PFA resin, then passed through a mold, cooled and shaped at room temperature to obtain a sheath-core yarn with uniform thickness;

[0040] (2) The core-sheath yarn obtained in step (1) is used as both warp and weft yarns, warped by a warping machine, woven by a rapier loom, and the weaving structure is plain weave. Finally, the yarn is heat-set by a hot roller at a temperature of 350° C., thereby obtaining the high-temperature resistant peelable fabric.

[0041] Example 2

[0042] A high temperature resistant peelable cloth with a thickness of 0.08mm and a surface density of 250g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 480 yarns / 10cm, and the weft density is 400 yarns / 10cm;

[0043] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D900 glass fiber yarn;

[0044] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 1.

[0045] Example 3

[0046] A high temperature resistant peelable cloth with a thickness of 0.10mm and a surface density of 290g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 320 yarns / 10cm, and the weft density is 400 yarns / 10cm;

[0047] The warp yarn is a sheath-core yarn A, in which the mass percentage of the sheath layer is 70%, and the material is a PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D450 glass fiber yarn;

[0048] The weft yarn is a sheath-core yarn B, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D900 glass fiber yarn;

[0049] The method for preparing the high temperature resistant peelable cloth provided in this embodiment comprises the following steps:

[0050] (1) D450 glass fiber yarn is impregnated in molten PFA resin, then passed through a mold, and cooled and shaped at room temperature to obtain a sheath-core yarn A with uniform thickness;

[0051] The D900 glass fiber yarn is impregnated in molten PFA resin, then passed through a mold, and cooled and shaped at room temperature to obtain a core-skin yarn B with uniform thickness;

[0052] (2) The core-sheath yarn A obtained in step (1) is used as the warp yarn, and the core-sheath yarn B is used as the weft yarn, and warping is performed using a warping machine, and weaving is performed using a rapier loom, the weaving structure is a plain weave, and finally heat-setting is performed using a hot roller at a temperature of 350° C., thereby obtaining the high-temperature resistant peelable fabric.

[0053] Example 4

[0054] A high temperature resistant peelable cloth with a thickness of 0.12mm and a surface density of 340g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 320 yarns / 10cm, and the weft density is 320 yarns / 10cm;

[0055] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D450 glass fiber yarn;

[0056] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 1.

[0057] Example 5

[0058] A high temperature resistant peelable cloth with a thickness of 0.12mm and a surface density of 340g / m 2, which is woven by warp yarn and weft yarn, and the weaving form is twill weave, the warp density is 320 yarns / 10cm, and the weft density is 320 yarns / 10cm;

[0059] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D450 glass fiber yarn;

[0060] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 1.

[0061] Example 6

[0062] A high temperature resistant peelable cloth with a thickness of 0.12mm and a surface density of 340g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 320 yarns / 10cm, and the weft density is 320 yarns / 10cm;

[0063] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 8.54g / 10min (372°C / 5kg), and the mass percentage of the core layer is 30%, and the material is D450 glass fiber yarn;

[0064] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 1.

[0065] Example 7

[0066] A high temperature resistant peelable cloth with a thickness of 0.16mm and a surface density of 360g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 240 yarns / 10cm, and the weft density is 320 yarns / 10cm;

[0067] The warp yarn is a sheath-core yarn A, in which the mass percentage of the sheath layer is 70%, and the material is a PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is E225 glass fiber yarn;

[0068] The weft yarn is a sheath-core yarn B, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is D450 glass fiber yarn;

[0069] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 3.

[0070] Example 8

[0071] A high temperature resistant peelable cloth with a thickness of 0.20mm and a surface density of 360g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 240 yarns / 10cm, and the weft density is 220 yarns / 10cm;

[0072] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 30%, and the material is E225 glass fiber yarn;

[0073] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 1.

[0074] Example 9

[0075] A high temperature resistant peelable cloth with a thickness of 0.18mm and a surface density of 220g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the warp density is 240 yarns / 10cm, and the weft density is 220 yarns / 10cm;

[0076] The warp yarn and the weft yarn are both sheath-core yarns, in which the mass percentage of the sheath layer is 50%, and the material is PFA resin with a melt index of 29.87 g / 10 min (372° C. / 5 kg), and the mass percentage of the core layer is 50%, and the material is E225 glass fiber yarn;

[0077] The preparation method of the high temperature resistant peelable cloth provided in this embodiment refers to Example 1.

[0078] Example 10

[0079] A high-temperature resistant peelable cloth, which differs from Example 1 in that, in the sheath-core yarn, the mass of the sheath layer accounts for 30%, the mass of the core layer accounts for 70%, and other structures, materials, parameters and preparation methods are the same as those in Example 1.

[0080] Embodiment 11

[0081] A high-temperature resistant peelable cloth, which differs from Example 1 in that, in the sheath-core yarn, the mass of the sheath layer accounts for 80%, the mass of the core layer accounts for 20%, and the other structures, materials, parameters and preparation methods are the same as those in Example 1.

[0082] Comparative Example 1

[0083] A peelable cloth with a thickness of 0.06mm and a surface density of 100g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the radial density is 275 yarns / 10cm, and the weft density is 275 yarns / 10cm;

[0084] The warp yarn and weft yarn are both D900 glass fiber yarn;

[0085] The preparation method of the high temperature resistant peelable cloth provided in this comparative example comprises: warping D900 glass fiber yarns with a warping machine, and then weaving them with a rapier loom, wherein the weaving structure is a plain weave, and the peelable cloth can be obtained.

[0086] Comparative Example 2

[0087] A high temperature resistant peelable cloth with a thickness of 0.06mm and a surface density of 100g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the radial density is 275 yarns / 10cm, and the weft density is 275 yarns / 10cm;

[0088] The warp yarn is a sheath-core yarn, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87g / 10min (372°C / 5kg), and the mass percentage of the core layer is 30%, and the material is D900 glass fiber yarn;

[0089] The weft yarn is D900 glass fiber yarn;

[0090] The preparation method of the high temperature resistant peelable cloth provided in this comparative example comprises the following steps:

[0091] (1) D900 glass fiber yarn is impregnated in molten PFA resin, then passed through a mold, cooled and shaped at room temperature to obtain a sheath-core yarn with uniform thickness;

[0092] (2) The core-sheath yarn obtained in step (1) is used as warp yarn, and D900 glass fiber yarn is used as weft yarn. A warping machine is used for warping, and a rapier loom is used for weaving. The weaving structure is plain weave. Finally, it is heat-set by a hot roller at a temperature of 350° C. to obtain the peelable cloth.

[0093] Comparative Example 3

[0094] A high temperature resistant peelable cloth with a thickness of 0.06mm and a surface density of 100g / m 2 , woven by warp yarn and weft yarn, the weaving form is plain weave, the radial density is 275 yarns / 10cm, and the weft density is 275 yarns / 10cm;

[0095] The weft yarn is a sheath-core yarn, in which the mass percentage of the sheath layer is 70%, and the material is PFA resin with a melt index of 29.87g / 10min (372°C / 5kg), and the mass percentage of the core layer is 30%, and the material is D900 glass fiber yarn;

[0096] The warp yarn is D900 glass fiber yarn;

[0097] The preparation method of the high temperature resistant peelable cloth provided in this comparative example comprises the following steps:

[0098] (1) D900 glass fiber yarn is impregnated in molten PFA resin, then passed through a mold, and cooled and shaped at room temperature to obtain a sheath-core yarn with uniform thickness;

[0099] (2) The core-sheath yarn obtained in step (1) is used as weft yarn, and D900 glass fiber yarn is used as warp yarn. A warping machine is used for warping, and a rapier loom is used for weaving. The weaving structure is plain weave. Finally, it is heat-set by a hot roller at a temperature of 350° C. to obtain the peelable cloth.

[0100] Performance Test:

[0101] (1) High temperature resistance: The peelable cloth was placed in an oven at 280°C for 6 hours to observe whether the peelable cloth was melted or broken;

[0102] (2) Breaking strength: Tested according to the method in standard 3923.1-2013;

[0103] (3) Peeling performance: Place an isolation film on the surface of the steel plate, and then place the obtained peelable cloth on the isolation film. Place 4 layers of prepreg on the peelable cloth, and then place an isolation film and breathable felt on top of them. Put the cloth into a vacuum bag and put it into an autoclave. Treat it at 280°C and 0.6 MPa for 6 h. After taking it out of the autoclave, observe the peeling of the obtained peelable cloth and the prepreg test plate.

[0104] The peelable fabrics provided in Examples 1 to 11 and Comparative Examples 1 to 3 were tested according to the above test method. The test results are shown in Table 1:

[0105] Table 1

[0106]

[0107]

[0108] From the data in Table 1, we can see that:

[0109] The high-temperature resistant peelable cloth provided in Examples 1 to 9 has excellent high-temperature resistance, mechanical properties and peelability, and with the increase of the glass fiber diameter and the thickness of the high-temperature resistant peelable cloth, the mechanical properties of the peelable cloth are significantly improved. Therefore, different types of products can be selected according to different usage conditions, and the scope of application is wide.

[0110] Compared with Example 1, the content of the cortex in the sheath-core fiber used in Example 10 is too low, resulting in the inability to completely wrap the glass fiber filaments in the core layer, causing the mechanical properties of the peelable cloth to decrease; the content of the cortex in the sheath-core fiber used in Example 11 is relatively high. Although the stripping performance and temperature resistance of the peelable cloth are not affected, the cost of the peelable cloth will be too high and material waste will occur.

[0111] Compared with Example 1, the yarn used in Comparative Example 1 does not have a PFA resin skin layer, which causes the glass fiber filaments to fuse with the prepreg, making it impossible to peel the peelable cloth from the product, resulting in it being unusable; Comparative Examples 2 and 3 only use PFA resin in the warp or weft yarns, and the peelable cloth cannot be completely peeled off from the product due to the problem of bonding between the prepreg and the glass fiber.

[0112] The applicant declares that the present invention illustrates a high temperature resistant peelable cloth and its preparation method and application through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A high temperature resistant peelable cloth, characterized in that: The high temperature resistant peelable cloth is woven from warp yarns and weft yarns; The warp yarn and the weft yarn are both sheath-core yarns, and the sheath layer of the sheath-core yarn is PFA resin, and the core layer is glass fiber yarn.

2. The high temperature resistant peelable cloth according to claim 1, characterized in that: The surface density of the high temperature resistant peelable fabric is 70 to 400 g / m 2 ; Preferably, the thickness of the high temperature resistant peelable cloth is 0.06-0.2 mm.

3. The high temperature resistant peelable cloth according to claim 1 or 2, characterized in that: The warp density of the high temperature resistant peelable fabric is 170 to 480 strands / 10 cm; Preferably, the weft density of the high temperature resistant peelable fabric is 150 to 400 strands / 10 cm.

4. The high temperature resistant peelable fabric according to any one of claims 1 to 3, characterized in that: The mass percentage of glass fiber in the sheath-core yarn is 30-50%; Preferably, the mass percentage of PFA resin in the sheath-core yarn is 50-70%.

5. The high temperature resistant peelable fabric according to any one of claims 1 to 4, characterized in that: The glass fiber yarn includes any one of D900 glass fiber yarn, D450 glass fiber yarn or E225 glass fiber yarn, or a combination of at least two of them.

6. The high temperature resistant peelable fabric according to any one of claims 1 to 5, characterized in that: The melt index of the PFA resin is 8 to 30 g / 10 min.

7. The high temperature resistant peelable fabric according to any one of claims 1 to 6, characterized in that: The weaving structure is a plain weave or a twill weave.

8. A method for preparing the high temperature resistant peelable fabric according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: (1) dipping glass fiber yarn into molten PFA resin, taking it out and cooling it to obtain a sheath-core yarn; (2) Weaving the obtained core-sheath yarn as warp yarn and weft yarn to obtain the high-temperature resistant peelable cloth.

9. The preparation method according to claim 8, characterized in that: Step (2) also includes the step of using a warping machine to perform warping before weaving; Preferably, the weaving in step (2) is carried out in a rapier loom; Preferably, step (2) further includes a heat setting step after the weaving is completed.

10. Use of the high temperature resistant peelable fabric as claimed in any one of claims 1 to 7 in processing and molding of composite materials.

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