A high corrosion-resistant steel / aluminum-plastic composite belt and its preparation process

Abstract

The present invention discloses a highly corrosion-resistant steel / aluminum-plastic composite belt and a preparation process thereof, wherein the composite belt comprises a steel / aluminum belt and an easy-to-peel film disposed on both sides thereof, wherein the peel strength between the steel / aluminum belt and the easy-to-peel film is 1.5-5 N / cm, and the raw materials for preparing the easy-to-peel film include: polycarbonate, styrene-butadiene block copolymer, and toughening agent. In the present invention, the peel strength between the steel / aluminum belt and the easy-to-peel film is regulated by adjusting parameters such as the composite temperature and speed between the easy-to-peel film and the steel / aluminum belt to reach 1.5-5 N / cm, which is much smaller than the peel strength of the existing steel / aluminum-plastic composite belt, and the easy-to-peel film can be easily and completely peeled off without residue or damage, and at the same time, the raw material composition of the easy-to-peel film is adjusted to significantly improve the corrosion resistance of the composite belt, and the composite belt is suitable for applications where the film needs to be completely separated from the steel / aluminum belt and applications where high corrosion resistance is required, etc., and the cost is low and suitable for industrial promotion and use.

Description

Technical Field

[0001] The invention belongs to the technical field of communication optical cables, and in particular relates to a highly corrosion-resistant steel / aluminum-plastic composite belt and a preparation process thereof. Background Art

[0002] In communication optical cables, steel / aluminum-plastic composite tapes mainly protect the cable core through armoring, and can resist external forces to ensure the normal use of communication optical cables. However, in existing steel / aluminum-plastic composite tapes, the peel strength between the steel / aluminum tape and the film attached thereto is generally not less than 6.13N / cm. For applications where the film needs to be completely separated from the steel / aluminum tape, there are problems such as difficulty in peeling and residual film after peeling. Moreover, although the corrosion resistance of the film meets the requirements of YD / T723.2 and YD / T723.3, the corrosion resistance cannot be further improved. Therefore, it is of great practical significance to design a steel / aluminum-plastic composite tape with high corrosion resistance. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a steel / aluminum-plastic composite belt with high corrosion resistance and a preparation process thereof.

[0004] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0005] A highly corrosion-resistant steel / aluminum-plastic composite belt, comprising a steel / aluminum belt and easy-to-peel films arranged on both sides thereof, wherein the peel strength between the steel / aluminum belt and the easy-to-peel film is 1.5-5N / cm, and the raw materials for preparing the easy-to-peel film include: polycarbonate, styrene-butadiene block copolymer, and toughening agent.

[0006] Furthermore, the raw materials for preparing the easy-to-peel film include, by weight: 60-80 parts of polycarbonate, 20-40 parts of styrene-butadiene block copolymer, 5-10 parts of polydimethylsiloxane, and 2-7 parts of toughening agent.

[0007] Furthermore, the easy-to-peel film is prepared by the following steps:

[0008] Weigh 60-80 parts of polycarbonate, 20-40 parts of styrene-butadiene block copolymer, 5-10 parts of polydimethylsiloxane and 2-7 parts of toughening agent by weight, add into an internal mixer, mix at 110-150° C. for 1-15 minutes, then apply a scraper coating and let stand to obtain the desired release film.

[0009] Furthermore, the easily strippable film includes a first low-temperature film, a high-temperature film and a second low-temperature film arranged in sequence from the inside to the outside, the first low-temperature film is attached to the steel / aluminum strip, and the second low-temperature film is attached to the outer sheath.

[0010] Furthermore, the composite temperature of the steel / aluminum strip and the easy-peel film is 195-325° C., and the production speed is 20-25 m / min.

[0011] Furthermore, the thickness of the steel / aluminum strip is 0.1-0.2 mm, and the thickness of the composite strip is 0.2-0.3 mm.

[0012] The invention discloses a preparation process of an easily peelable steel / aluminum-plastic composite tape, comprising the following steps:

[0013] Select appropriate steel / aluminum strips and easy-to-peel films, place the steel / aluminum strips and easy-to-peel films on unwinding rollers, and then control the steel / aluminum strips and easy-to-peel films to be continuously unwound at a certain tension and speed;

[0014] Feed the steel / aluminum strip and the easy-peel film into the laminating machine, preheat the steel / aluminum strip to reach the laminating temperature;

[0015] The easy-to-peel film is tightly thermally bonded to the steel / aluminum strip from both sides, enters the post-oven to form a composite strip, and is finally rolled up after cooling and put into storage after passing the inspection.

[0016] Furthermore, the unwinding tension of the easy-to-peel film is controlled at 0.18-0.22N, and the unwinding speed is 20-25m / min.

[0017] Furthermore, the steel / aluminum strip is preheated by passing through an upper oven and a vertical oven at a speed of 20-25 m / min, the temperature of the upper oven is 195-205°C, and the temperature of the vertical oven is 315-325°C.

[0018] Furthermore, the temperature of the steel / aluminum strip and the easy-peel film entering the post-oven after being compounded is 315-325°C.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The invention discloses a highly corrosion-resistant steel / aluminum-plastic composite belt and a preparation process thereof. The composite belt comprises a steel / aluminum belt and easy-to-peel films arranged on both sides thereof. The peel strength between the steel / aluminum belt and the easy-to-peel film is 1.5-5N / cm. The raw materials for preparing the easy-to-peel film include: polycarbonate, styrene-butadiene block copolymer, and a toughening agent. In the present invention, the first low-temperature film of the easy-to-peel film is bonded to the steel / aluminum strip, and the second low-temperature film is bonded to the outer sheath. The peeling strength between the steel / aluminum strip and the easy-to-peel film is regulated to reach 1.5-5N / cm by regulating parameters such as the composite temperature and speed between the easy-to-peel film and the steel / aluminum strip, which is much smaller than the peeling strength of the existing steel / aluminum-plastic composite strip (not less than 6.13N / cm). The easy-to-peel film can be easily and completely peeled off from the steel / aluminum strip without residue or damage. At the same time, the raw material composition of the easy-to-peel film is adjusted to significantly improve the corrosion resistance of the composite strip. The easy-to-peel film is suitable for applications where the film needs to be completely separated from the steel strip and where high corrosion resistance is required. The easy-to-peel film is low in cost and suitable for industrial promotion and use. DETAILED DESCRIPTION

[0021] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0023] On the one hand, the present invention provides a highly corrosion-resistant steel / aluminum-plastic composite belt, comprising a steel / aluminum belt and easy-to-peel films arranged on both sides thereof, wherein the peel strength between the steel / aluminum belt and the easy-to-peel film is 1.5-5N / cm, and the raw materials for preparing the easy-to-peel film include, by weight, 60-80 parts of polycarbonate, 20-40 parts of styrene-butadiene block copolymer, 5-10 parts of polydimethylsiloxane, and 2-7 parts of a toughening agent, and the easy-to-peel film is prepared by the following steps:

[0024] Weigh 60-80 parts of polycarbonate, 20-40 parts of styrene-butadiene block copolymer, 5-10 parts of polydimethylsiloxane and 2-7 parts of toughening agent by weight, add into an internal mixer, mix at 110-150° C. for 1-15 minutes, then apply a scraper coating and let stand to obtain the desired release film.

[0025] The easy-to-peel film comprises a first low-temperature film, a high-temperature film and a second low-temperature film which are sequentially arranged from the inside to the outside. The first low-temperature film is attached to the steel / aluminum strip, and the second low-temperature film is attached to the outer sheath.

[0026] The composite temperature of the steel / aluminum strip and the easy-peel film is 195-325°C, and the production speed is 20-25m / min.

[0027] The thickness of the steel / aluminum strip is 0.1-0.2mm, and the thickness of the composite strip is 0.2-0.3mm.

[0028] On the other hand, the present invention also provides a process for preparing an easily peelable steel / aluminum-plastic composite tape, comprising the following steps:

[0029] Select a steel / aluminum strip and an easy-to-peel film with a thickness of 0.1-0.2 mm, place the steel / aluminum strip and the easy-to-peel film on unwinding rollers respectively, and then control the steel / aluminum strip and the easy-to-peel film to be continuously unwound at a certain tension and speed respectively, wherein the unwinding tension of the easy-to-peel film is controlled at 0.18-0.22N, and the unwinding speed is 20-25m / min;

[0030] The steel / aluminum strip and the easy-peel film are fed into the laminating machine. The steel / aluminum strip passes through the upper oven and the vertical oven at a speed of 20-25m / min for preheating. The temperature of the upper oven is 195-205℃, and the temperature of the vertical oven is 315-325℃, so that the steel / aluminum strip reaches the composite temperature;

[0031] The easy-to-peel film is tightly thermally bonded to the steel / aluminum strip from both sides and enters the post-oven at a speed of 20-25m / min. The temperature of the post-oven is 315-325℃ to form a composite strip. Finally, it is cooled and rolled up, and put into storage after passing the inspection.

[0032] Example 1

[0033] A highly corrosion-resistant steel / aluminum-plastic composite belt comprises a steel belt and easy-to-peel films arranged on both sides thereof, wherein the peel strength between the steel belt and the easy-to-peel film is 2-5 N / cm, and the raw materials for preparing the easy-to-peel film comprise, by weight, 60 parts of polycarbonate, 40 parts of styrene-butadiene block copolymer, 10 parts of polydimethylsiloxane, and 7 parts of a toughening agent, and the easy-to-peel film is prepared by the following steps:

[0034] 60 parts of polycarbonate, 40 parts of styrene-butadiene block copolymer, 10 parts of polydimethylsiloxane and 7 parts of toughening agent were weighed by weight, added into an internal mixer, and internally mixed at 120°C for 5 minutes, followed by scraping and standing to obtain the desired peeling film, which includes a first low-temperature film, a high-temperature film and a second low-temperature film arranged in sequence from the inside to the outside, the first low-temperature film being bonded to the steel / aluminum strip, and the second low-temperature film being bonded to the outer sheath.

[0035] A preparation process of an easily peelable steel / aluminum-plastic composite tape comprises the following steps:

[0036] A steel strip with a thickness of 0.115 mm and an easy-to-peel film with a thickness of 0.045 mm were selected, and the steel strip and the easy-to-peel film were placed on unwinding rollers respectively, and then the steel strip and the easy-to-peel film were controlled to be continuously unwound at a certain tension and speed respectively, wherein the unwinding tension of the easy-to-peel film was controlled at 0.18 N, and the unwinding speed was 22 m / min;

[0037] The steel strip and the easy-peel film are fed into the laminating machine. The steel strip passes through the upper oven and the vertical oven at a speed of 22m / min for preheating. The temperature of the upper oven is 200℃, the temperature of the vertical oven is 320℃, and the temperature of the rear oven is 320℃, so that the steel strip reaches the laminating temperature;

[0038] The easy-to-peel film is tightly thermally bonded to the steel strip from both sides, and enters the post-oven for thermal bonding at a speed of 22m / min. The temperature of the post-oven is 320℃ to form a composite strip, and finally it is rolled up after being cooled by cold water. It is put into storage after passing the inspection. The surface of the easy-to-peel steel-plastic composite strip should be flat, uniform, smooth, free of impurities, spots or damage, etc. The easy-to-peel film can be completely peeled off from the steel strip.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that, in terms of weight, the raw materials for preparing the easy-peelable film of this embodiment include: 80 parts of polycarbonate, 20 parts of styrene-butadiene block copolymer, 5 parts of polydimethylsiloxane, and 2 parts of toughening agent. The easy-peelable film is prepared by the following steps:

[0041] 80 parts of polycarbonate, 20 parts of styrene-butadiene block copolymer, 5 parts of polydimethylsiloxane and 2 parts of toughening agent were weighed by weight, added into an internal mixer, and mixed at 110° C. for 10 minutes, followed by scraping and allowing to stand to obtain the desired release film.

[0042] The rest is the same as in Example 1.

[0043] Example 3

[0044] The difference between this embodiment and embodiment 1 is that, in terms of weight, the raw materials for preparing the easy-peelable film of this embodiment include: the raw materials for preparing the easy-peelable film include: 70 parts of polycarbonate, 25 parts of styrene-butadiene block copolymer, 8 parts of polydimethylsiloxane, and 6 parts of toughening agent, and the easy-peelable film is prepared by the following steps:

[0045] 70 parts of polycarbonate, 25 parts of styrene-butadiene block copolymer, 8 parts of polydimethylsiloxane and 6 parts of toughening agent were weighed by weight, added into an internal mixer, and mixed at 110° C. for 5 minutes, followed by scraping and allowing to stand to obtain the desired release film.

[0046] The rest is the same as in Example 1.

[0047] Comparative Example 1

[0048] The difference between this comparative example and Example 1 is that in this comparative example, the steel strip and the easy-to-peel film are fed into the laminating machine, and the steel strip is preheated through the upper oven and the vertical oven at a speed of 22 m / min. The temperature of the upper oven is 220°C, and the temperature of the vertical oven is 330°C, so that the steel strip reaches the composite temperature; the easy-to-peel film is tightly thermally bonded to the steel / aluminum strip from both sides of the steel strip, and enters the rear oven at a speed of 22 m / min. The temperature of the rear oven is 390°C to form a composite strip, and finally it is rolled up after cooling and put into storage after passing the inspection.

[0049] The rest is the same as in Example 1.

[0050] Comparative Example 2

[0051] The difference between this comparative example and Example 1 is that in this comparative example, the steel strip and the easy-to-peel film are fed into the laminating machine, and the steel strip is preheated through the upper oven and the vertical oven at a speed of 22 m / min. The temperature of the upper oven is 240°C, and the temperature of the vertical oven is 350°C, so that the steel strip reaches the composite temperature; the easy-to-peel film is tightly thermally bonded to the steel / aluminum strip from both sides of the steel strip, and enters the rear oven at a speed of 22 m / min. The temperature of the rear oven is 410°C to form a composite strip, and finally it is rolled up after cooling and put into storage after passing the inspection.

[0052] The rest is the same as in Example 1.

[0053] Comparative Example 3

[0054] The difference between this comparative example and Example 1 is that this comparative example includes the following steps:

[0055] A steel strip with a thickness of 0.115 mm and an easy-to-peel film with a thickness of 0.045 mm were selected, and the steel strip and the easy-to-peel film were placed on unwinding rollers respectively, and then the steel strip and the easy-to-peel film were controlled to be continuously unwound at a certain tension and speed respectively, wherein the unwinding tension of the easy-to-peel film was controlled at 0.18 N, and the unwinding speed was 30 m / min;

[0056] The steel strip and the easy-peel film are fed into the laminating machine. The steel / aluminum strip passes through the upper oven and the vertical oven at a speed of 30m / min for preheating. The temperature of the upper oven is 200℃, the temperature of the vertical oven is 320℃, and the temperature of the rear oven is 320℃, so that the steel strip reaches the laminating temperature;

[0057] The easy-to-peel film is tightly thermally bonded to the steel / aluminum strip from both sides of the steel strip, and enters the post-oven for thermal bonding at a speed of 30m / min. The temperature of the post-oven is 320℃ to form a composite strip, which is finally cooled with cold water and rolled up. It is then put into storage after passing the inspection.

[0058] The rest is the same as in Example 1.

[0059] Comparative Example 4

[0060] The difference between this comparative example and Example 1 is that in this comparative example, the easy-to-peel film is replaced by a conventional corrosion-resistant film.

[0061] The peel strength obtained in Examples 1-3 and Comparative Examples 1-3 was tested. In the easily peelable steel / aluminum-plastic composite tapes prepared in Examples 1-3, the peel strength between the steel / aluminum tape and the easily peelable film was 1.5-4 N / cm. In the steel / aluminum-plastic composite tapes of Comparative Examples 1-3, the peel strength between the steel / aluminum tape and the easily peelable film was not less than 6.13 N / cm. It can be seen that the composite temperature and production speed have an effect on the peel strength between the steel / aluminum tape and the easily peelable film. Too high a temperature or too fast a speed is not conducive to regulating a suitable peel strength.

[0062] Examples 1-3 and Comparative Example 4 were immersed in 5% sodium hydroxide, hydrochloric acid, and pure salt water, respectively, for corrosion resistance testing. The test results show that Examples 1-3 did not swell or corrode, while Comparative Example 4 had slight swelling and corrosion.

[0063] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0064] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A highly corrosion-resistant steel / aluminum-plastic composite belt, characterized in that: The composite tape comprises a steel / aluminum tape and easy-to-peel films arranged on both sides thereof, and the peeling strength between the steel / aluminum tape and the easy-to-peel film is 1.5-5N / cm; The raw materials for preparing the easy-to-peel film include, by weight: 60-80 parts of polycarbonate, 20-40 parts of styrene-butadiene block copolymer, 5-10 parts of polydimethylsiloxane, and 2-7 parts of toughening agent; The easy-to-peel film is prepared by the following steps: Weigh 60-80 parts of polycarbonate, 20-40 parts of styrene-butadiene block copolymer, 5-10 parts of polydimethylsiloxane, and 2-7 parts of toughening agent by weight, add them into an internal mixer, mix them at 110-150° C. for 1-15 minutes, then apply a knife coating, and let it stand to obtain the desired release film; The easy-to-peel film comprises a first low-temperature film, a high-temperature film and a second low-temperature film arranged in sequence from the inside to the outside, the first low-temperature film is attached to the steel / aluminum strip, and the second low-temperature film is attached to the outer sheath; The preparation process of the steel / aluminum-plastic composite strip comprises the following steps: Select appropriate steel / aluminum strips and easy-to-peel films, place the steel / aluminum strips and easy-to-peel films on unwinding rollers, and then control the steel / aluminum strips and easy-to-peel films to be continuously unwound at a certain tension and speed; Feed the steel / aluminum strip and the easy-peel film into the laminating machine, preheat the steel / aluminum strip to reach the laminating temperature; The easy-to-peel film is tightly thermally bonded to the steel / aluminum strip from both sides, and then enters the post-oven to form a composite strip. Finally, it is rolled up after cooling and put into storage after passing the inspection; The steel / aluminum strip is preheated by passing through an upper oven and a vertical oven at a speed of 20-25 m / min, the temperature of the upper oven is 195-205° C., and the temperature of the vertical oven is 315-325° C.; The composite temperature of the steel / aluminum strip and the easy-peel film is 195-325°C, and the production speed is 20-25m / min; The temperature of the steel / aluminum strip and the easy-peel film after being compounded and entering the post-oven is 315-325°C.

2. A highly corrosion-resistant steel / aluminum-plastic composite belt according to claim 1, characterized in that: The thickness of the steel / aluminum strip is 0.1-0.2 mm, and the thickness of the composite strip is 0.2-0.3 mm.

3. A highly corrosion-resistant steel / aluminum-plastic composite belt according to claim 1, characterized in that: The unwinding tension of the easy-to-peel film is controlled at 0.18-0.22N, and the unwinding speed is 20-25m / min.