阅读说明：本技术 一种耐高温型离型纸及其制备方法 (High-temperature-resistant release paper and preparation method thereof ) 是由 黄智聪 于 2021-01-21 设计创作，主要内容包括：本申请公开了一种耐高温型离型纸,包括离型基纸层,所述离型基纸层的上侧由内至外依次设置有耐高温薄膜层和淋膜层；所述离型基纸层的下侧由内至外依次设置有水性胶层和保护层。本发明公开的耐高温型离型纸,配方合理,制备工艺简单,生产成本低,在230～250℃具有良好耐温性能,在合成革和人造革领域应用前景广泛。(The application discloses high-temperature-resistant release paper which comprises a release base paper layer, wherein a high-temperature-resistant film layer and a laminating film layer are sequentially arranged on the upper side of the release base paper layer from inside to outside; and the lower side of the release base paper layer is sequentially provided with a water-based adhesive layer and a protective layer from inside to outside. The high-temperature-resistant release paper disclosed by the invention is reasonable in formula, simple in preparation process, low in production cost, good in temperature resistance at 230-250 ℃, and wide in application prospect in the field of synthetic leather and artificial leather.)

1. The high-temperature-resistant release paper is characterized by comprising a release base paper layer, wherein a high-temperature-resistant film layer and a laminating film layer are sequentially arranged on the upper side of the release base paper layer from inside to outside; and the lower side of the release base paper layer is sequentially provided with a water-based adhesive layer and a protective layer from inside to outside.

2. The high-temperature-resistant release paper according to claim 1, wherein the release base paper comprises the following components in parts by mass: 60-70 parts of softwood, 10-20 parts of hardwood pulp, 2-4 parts of bamboo charcoal powder, 2-4 parts of modified polyester fiber, 4-8 parts of inorganic high-temperature resistant auxiliary agent, 4-8 parts of organic high-temperature resistant auxiliary agent, 2-4 parts of high-temperature resistant reinforcing agent, 0.5-0.8 part of sizing agent and 0.2-0.6 part of humidifying agent.

3. The high-temperature-resistant release paper according to claim 1, wherein the preparation method of the release base paper comprises the following steps in sequence:

s1 preparation of slurry: cutting 60-70 parts of softwood and 10-20 parts of hardwood into chips, then cooking and pulping by a sulfite method, carrying out DQP three-section totally chlorine-free bleaching and washing to obtain electronic grade pulp with whiteness reaching 70-80%, adding bamboo charcoal powder with the mass of 2-4 parts of pulp, uniformly dispersing, and pulping to 35-40 DEG SR by adopting a pulping machine under the concentration of 2.0-3.0% pulp;

s2 slurry preparation: adding 2-4 parts of modified polyester fiber into the slurry prepared in the step S1, and mixing the slurry in a slurry mixing pool;

s3 sheet making: adding 4-8 parts of inorganic high-temperature resistant auxiliary agent, 4-8 parts of organic high-temperature resistant auxiliary agent, 2-4 parts of high-temperature resistant reinforcing agent, 0.5-0.8 part of sizing agent and 0.2-0.6 part of humidifying agent into the slurry in sequence, and then fully separating in a fiber separator at the rotation speed of 30000 r/min and the rotation speed of 2800 r/min; making the dispersed slurry into sheets in a sheet making machine;

s4 paper forming: the release base paper is prepared by a pressing part, a front drying part, sizing, a rear drying part, press polishing, reeling and slitting.

4. The preparation method of the high-temperature resistant release paper according to claims 1 to 3, characterized by sequentially preparing release base paper with the thickness of 0.10-0.15 mm; covering a high-temperature resistant film with the thickness of 0.20-0.25 mm on the release base paper; spraying a fluorine-silicon release agent with the film thickness of 0.04-0.06 mm on the upper side of the high-temperature resistant film; the lower side of the release base paper is sequentially provided with a water-based adhesive layer with the thickness of 0.03-0.08 mm and a protective layer with the thickness of 0.05-0.10 mm.

Technical Field

The application relates to the technical field of release paper, in particular to high-temperature-resistant release paper and a preparation method thereof.

Background

The release paper is special paper which can prevent isolated substances from being adhered to the surface and can protect the isolated substances from being polluted. The types of release paper can be divided into two main types: one is release paper for producing polyvinyl chloride (PVC) artificial leather; the other is release paper for producing Polyurethane (PU) synthetic leather.

The high-temperature resistant release paper can be used for manufacturing synthetic leather, artificial leather and the like with different temperature requirements. The heat-resistant temperature of the high-temperature resistant release paper is 150-240 ℃, the heat-resistant temperature of the release paper prepared at present in China is lower, the heat-resistant temperature of the release paper for manufacturing PVC artificial leather is about 200 ℃, and the heat-resistant temperature of the release paper for manufacturing PU synthetic leather is about 160 ℃, so that the working requirement cannot be met. The heat-resistant temperature of the foreign high-temperature resistant release paper can reach 265 ℃ at most, so most of the high-temperature resistant release paper depends on import. Therefore, the research and development of the high-temperature resistant release paper not only has higher market value, but also can break through the monopoly state of foreign enterprises on the product series, once the domestic high-temperature resistant release paper is successfully developed and put into the market, the price reduction pressure is inevitably generated on the price of imported paper, and therefore high-temperature resistant paper application merchants in China can obtain cheaper high-temperature resistant release paper, and the production cost is reduced.

Disclosure of Invention

The invention aims to overcome the defects and provides the high-temperature-resistant release paper and the preparation method thereof, the formula is reasonable, the preparation process is simple, the production cost is low, the high-temperature-resistant release paper with good temperature resistance at 230-250 ℃ is finally obtained, and the application prospect in the fields of synthetic leather and artificial leather is wide.

In order to achieve the purpose, the invention provides the following technical scheme:

the high-temperature-resistant release paper comprises a release base paper layer, wherein a high-temperature-resistant thin film layer and a laminating layer are sequentially arranged on the upper side of the release base paper layer from inside to outside; and the lower side of the release base paper layer is sequentially provided with a water-based adhesive layer and a protective layer from inside to outside.

The invention also relates to a preparation method of the high-temperature resistant release paper, which sequentially comprises the steps of preparing release base paper with the thickness of 0.10-0.15 mm; covering a high-temperature resistant film with the thickness of 0.20-0.25 mm on the release base paper; spraying a fluorine-silicon release agent with the film thickness of 0.04-0.06 mm on the upper side of the high-temperature resistant film; the lower side of the release base paper is sequentially provided with a water-based adhesive layer with the thickness of 0.03-0.08 mm and a protective layer with the thickness of 0.05-0.10 mm.

The release base paper comprises the following components in parts by weight:

60-70 parts of softwood, 10-20 parts of hardwood pulp, 2-4 parts of bamboo charcoal powder, 2-4 parts of modified polyester fiber, 4-8 parts of inorganic high-temperature resistant auxiliary agent, 4-8 parts of organic high-temperature resistant auxiliary agent, 2-4 parts of high-temperature resistant reinforcing agent, 0.5-0.8 part of sizing agent and 0.2-0.6 part of humidifying agent.

The preparation method of the release base paper sequentially comprises the following steps:

s1 preparation of slurry: cutting 60-70 parts of softwood and 10-20 parts of hardwood into chips, then cooking and pulping by a sulfite method, carrying out DQP three-section totally chlorine-free bleaching and washing to obtain electronic grade pulp with whiteness reaching 70-80%, adding bamboo charcoal powder with the mass of 2-4 parts of pulp, uniformly dispersing, and pulping to 35-40 DEG SR by adopting a pulping machine under the concentration of 2.0-3.0% pulp;

s2 slurry preparation: adding 2-4 parts of modified polyester fiber into the slurry prepared in the step S1, and mixing the slurry in a slurry mixing pool;

s3 sheet making: adding 4-8 parts of inorganic high-temperature resistant auxiliary agent, 4-8 parts of organic high-temperature resistant auxiliary agent, 2-4 parts of high-temperature resistant reinforcing agent, 0.5-0.8 part of sizing agent and 0.2-0.6 part of humidifying agent into the slurry in sequence, and then fully separating in a fiber separator at the rotation speed of 30000 r/min and the rotation speed of 2800 r/min; making the dispersed slurry into sheets in a sheet making machine;

s4 paper forming: the release base paper is prepared by a pressing part, a front drying part, sizing, a rear drying part, press polishing, reeling and slitting.

Compared with the prior art, the invention has the advantages that: the high-temperature-resistant release paper disclosed by the invention is reasonable in formula, simple in preparation process, low in production cost, good in temperature resistance at 230-250 ℃, and wide in application prospect in the field of synthetic leather and artificial leather.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Example 1

The preparation method of the release base paper sequentially comprises the following steps:

s1 preparation of slurry: cutting 65 parts of softwood and 15 parts of hardwood into chips, cooking and pulping by a sulfite method, carrying out DQP three-section totally chlorine-free bleaching and washing to obtain electronic grade pulp with the whiteness reaching 78%, adding bamboo charcoal powder with the mass of 3 parts of pulp, uniformly dispersing, and pulping to 38-degree SR at the pulp concentration of 2.6% by using a pulping machine;

s2 slurry preparation: adding 3 parts of modified polyester fiber into the slurry prepared in the step S1, and mixing the slurry in a slurry mixing pool;

s3 sheet making: adding 5 parts of inorganic high-temperature resistant auxiliary agent, 6 parts of organic high-temperature resistant auxiliary agent, 3 parts of high-temperature resistant reinforcing agent, 0.6 part of sizing agent and 0.4 part of humidifying agent into the slurry in sequence, and then fully separating in a fiber separator at the revolution of 30000 r at the rotation speed of 2800 r/min; making the dispersed slurry into sheets in a sheet making machine;

s4 paper forming: the release base paper with the thickness of 0.10mm is prepared by a pressing part, a front drying part, sizing, a rear drying part, press polishing, reeling and slitting.

The preparation of the high-temperature resistant release paper sequentially comprises the following steps:

covering a high-temperature resistant film with the thickness of 0.25mm on a release base paper with the thickness of 0.10 mm; spraying a fluorosilicone release agent with the film thickness of 0.04mm on the upper side of the high-temperature resistant film; and sequentially arranging a water-based adhesive layer with the thickness of 0.06mm and a protective layer with the thickness of 0.08mm on the lower side of the release base paper to obtain the high-temperature-resistant release paper.

Example 2

The preparation method of the release base paper sequentially comprises the following steps:

s1 preparation of slurry: cutting 70 parts of softwood and 10 parts of hardwood into chips, cooking and pulping by a sulfite method, carrying out DQP three-section totally chlorine-free bleaching and washing to obtain electronic grade pulp with whiteness reaching 74%, adding bamboo charcoal powder with 3 parts of pulp by mass, uniformly dispersing, and pulping to 36-degree SR at the pulp concentration of 2.4% by using a pulping machine;

s2 slurry preparation: adding 2 parts of modified polyester fiber into the slurry prepared in the step S1, and mixing the slurry in a slurry mixing pool;

s3 sheet making: adding 7 parts of inorganic high-temperature resistant auxiliary agent, 5 parts of organic high-temperature resistant auxiliary agent, 2 parts of high-temperature resistant reinforcing agent, 0.8 part of sizing agent and 0.5 part of humidifying agent into the slurry in sequence, and then fully separating in a fiber separator at the revolution of 30000 r at the rotation speed of 2800 r/min; making the dispersed slurry into sheets in a sheet making machine;

s4 paper forming: the release base paper with the thickness of 0.12mm is prepared by a pressing part, a front drying part, sizing, a rear drying part, press polishing, reeling and slitting.

The preparation of the high-temperature resistant release paper sequentially comprises the following steps:

covering a high-temperature resistant film with the thickness of 0.20mm on a release base paper with the thickness of 0.12 mm; spraying a fluorosilicone release agent with the film thickness of 0.05mm on the upper side of the high-temperature resistant film; and sequentially arranging a water-based adhesive layer with the thickness of 0.07mm and a protective layer with the thickness of 0.06mm on the lower side of the release base paper to obtain the high-temperature-resistant release paper.

Example 3

The preparation method of the release base paper sequentially comprises the following steps:

s1 preparation of slurry: cutting 60 parts of softwood and 20 parts of hardwood into chips, cooking and pulping by a sulfite method, carrying out DQP three-section totally chlorine-free bleaching and washing to obtain electronic grade pulp with the whiteness reaching 76%, adding bamboo charcoal powder with the mass of 3 parts of pulp, uniformly dispersing, and pulping to 37-degree SR at the pulp concentration of 2.8% by using a pulping machine;

s2 slurry preparation: adding 4 parts of modified polyester fiber into the slurry prepared in the step S1, and mixing the slurry in a slurry mixing pool;

s3 sheet making: adding 6 parts of inorganic high-temperature resistant auxiliary agent, 7 parts of organic high-temperature resistant auxiliary agent, 3 parts of high-temperature resistant reinforcing agent, 0.5 part of sizing agent and 0.5 part of humidifying agent into the slurry in sequence, and then fully separating in a fiber separator at the revolution of 30000 r at the rotation speed of 2800 r/min; making the dispersed slurry into sheets in a sheet making machine;

s4 paper forming: the release base paper with the thickness of 0.15mm is prepared by a pressing part, a front drying part, sizing, a rear drying part, press polishing, reeling and slitting.

The preparation of the high-temperature resistant release paper sequentially comprises the following steps:

covering a high-temperature resistant film with the thickness of 0.22mm on a release base paper with the thickness of 0.15 mm; spraying a fluorosilicone release agent with the film thickness of 0.06mm on the upper side of the high-temperature resistant film; and sequentially arranging a water-based adhesive layer with the thickness of 0.08mm and a protective layer with the thickness of 0.07mm on the lower side of the release base paper to obtain the high-temperature-resistant release paper.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.