High-temperature-resistant PVC coating film material, high-temperature heat storage water bag and preparation method of high-temperature-resistant PVC coating film

Abstract

The invention discloses a high-temperature-resistant PVC coating film material, a high-temperature heat storage water bag and a preparation method of the high-temperature-resistant PVC coating film material. The high-temperature-resistant PVC coating film material comprises polyurethane cloth, a high-temperature-resistant PVC bottom layer coating and a high-temperature-resistant PVC surface layer coating, the high-temperature-resistant PVC bottom layer coating and the high-temperature-resistant PVC surface layer coating are respectively formed by sequentially drying, integrally plasticizing and cooling an upper layer of high-temperature-resistant PVC slurry and a lower layer of high-temperature-resistant PVC slurry. The PVC coating has high temperature resistance, can be used at the high temperature of 70-100 DEG C, greatly widens the application range of the PVC coating membrane material, can be applied to the high-temperature-resistant field and occasion, and greatly widens the application range of the PVC coating membrane material.

Description

Technical Field

[0001] This invention relates to the field of polymer composite materials technology, and in particular to a high-temperature resistant PVC coated film, a high-temperature hot water storage bag, and a method for preparing the same. Background Technology

[0002] PVC coated membrane is a new type of composite material. It uses high-performance polyester fiber woven fabric as the base material and coats it with PVC paste resin slurry through a double-sided blade coating process.

[0003] Generally, the operating temperature range of PVC coated membrane materials is -30℃ to +70℃, which meets the requirements in most situations. In recent years, with the increasing number of PVC coated membrane production lines, rapid growth in output, continuous improvement in quality, and a larger market share, the application range has also expanded. Correspondingly, some special requirements for operating temperature are becoming increasingly stringent. In terms of low temperatures, with the application of liquid nitrile rubber, PVC coated membrane materials can already achieve -40℃ to -45℃, while research on high-temperature applications is relatively limited.

[0004] However, in fact, high-temperature resistant PVC coated membrane materials are needed for the outer lining of oil pipelines, the coverings of various high-temperature sewage tanks, and some liquid bags containing hot water.

[0005] Therefore, it is essential to develop a high-temperature resistant PVC coating membrane material, which can enrich the product structure of PVC coating membrane materials. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a high-temperature resistant PVC coated membrane material, a high-temperature hot water storage bag, and a method for preparing the same. The PVC coating has high temperature resistance and can be used at high temperatures of 70℃-100℃, greatly expanding the application range of PVC coated membrane materials. It can be used in high-temperature fields and occasions, significantly broadening the application scope of PVC coated membrane materials.

[0007] A high-temperature resistant PVC coating film material includes a polyurethane cloth and a high-temperature resistant PVC underlayer coating and a high-temperature resistant PVC toplayer coating coated on the polyurethane cloth. The high-temperature resistant PVC underlayer coating and the high-temperature resistant PVC toplayer coating are both formed by drying, plasticizing and cooling two layers of high-temperature resistant PVC slurry in sequence.

[0008] As a preferred embodiment of the above technical solution, the polyurethane fabric is a mesh fabric made of high-strength, low-shrinkage polyester fiber through plain weave or Panamax weave.

[0009] As a preferred embodiment of the above technical solution, the components of the lower layer high-temperature resistant PVC slurry include polyvinyl chloride paste resin, polyvinyl chloride paste resin, diisononyl phthalate, diisodecyl phthalate, stabilizer, filler, pigment, functional additives, and binder, wherein the weight parts of the main components are:

[0010] Polyvinyl chloride paste resin: 100;

[0011] Diisononyl phthalate: 30-70;

[0012] Diisodecyl phthalate: 0-40;

[0013] Stabilizer: 1-3.

[0014] As a preferred embodiment of the above technical solution, the components of the high-temperature resistant PVC slurry in the upper layer include polyvinyl chloride paste resin, polyvinyl chloride paste resin, diisononyl phthalate, trioctyl trimellitate, stabilizer, organotin stabilizer, filler, pigment, and functional additives, wherein the weight parts of the main components are:

[0015] Polyvinyl chloride paste resin: 100;

[0016] Diisononyl phthalate: 20-70;

[0017] Trioctyl trimellitate: 0–50;

[0018] Stabilizer: 3-6;

[0019] Organotin stabilizer: 0-2.

[0020] As a preferred embodiment of the above technical solution, the polyvinyl chloride paste resin is selected from paste resins with a K value of 60 to 80.

[0021] As a preferred embodiment of the above technical solution, the stabilizer is a powdered or liquid barium-zinc composite stabilizer.

[0022] As a preferred embodiment of the above technical solution, the organotin stabilizer is selected from lauryl esters or maleic esters.

[0023] A high-temperature hot water storage bag is made of the high-temperature resistant PVC coated film material described in any one of the above-mentioned methods.

[0024] A method for preparing the high-temperature resistant PVC coated film material as described in any one of the above-mentioned methods, the specific preparation process is as follows:

[0025] Step 1: Prepare the high-temperature resistant PVC coating slurry:

[0026] Premixing involves first adding each plasticizer and stabilizer to a container, then adding PVC paste resin, filler, and functional additives in sequence while stirring. After stirring at high speed until homogeneous, the premixing process is complete.

[0027] Grinding involves grinding the premixed slurry using a three-roll mill, followed by impurity filtration.

[0028] For color matching, add color paste soaked and ground with plasticizer according to the product requirements, stir evenly at high speed, and then perform vacuum stirring to remove bubbles;

[0029] Step 2, coating: The prepared PVC coating slurry is repeatedly scraped and dried on the polyurethane cloth to make all the scraped high-temperature resistant PVC coatings integrally plasticized and molded with the polyurethane cloth.

[0030] As a preferred embodiment of the above technical solution, in step two, the high-temperature resistant PVC coating slurry undergoes four coats and three drying processes, specifically:

[0031] The amount of slurry applied for the first and second coats is 100g / ㎡~300g / ㎡, and an adhesive should be added between the first and second coats.

[0032] The amount of sizing applied in the third coat is 100g / ㎡~400g / ㎡;

[0033] The amount of sizing applied for the fourth coat is 100g / ㎡~500g / ㎡;

[0034] After the second, third, and fourth coats, the paint must be dried in an oven.

[0035] The beneficial effects of this invention are as follows:

[0036] Modifying ordinary PVC base coats with the special plasticizer diisocyanate (DICET) improves temperature resistance, but the addition of large amounts of DICET can reduce the open time and peel strength of the PVC base coat with adhesive. Therefore, DICET cannot be used exclusively. Similarly, modifying ordinary top coat coats with trioctyl trimellitate (TMT) also improves temperature resistance, but the addition of large amounts of TMTET can negatively impact the plasticizing and processing properties of the PVC top coat coat. Therefore, TMT cannot be used exclusively. In conclusion, a combination of special plasticizers is essential for obtaining a high-temperature resistant PVC coating film in both base coats and top coats.

[0037] High-temperature resistant PVC coated membranes can withstand heat aging at temperatures ranging from 70℃ to 100℃, avoiding the damage and side effects caused by high temperatures, such as large heat loss and volatilization of plasticizers, significant material weight loss, material hardening and deformation, ultimately leading to material scrapping. High-temperature resistant PVC coated membranes can be used long-term within a high-temperature range of 70℃ to 100℃, such as the outer covering for high-temperature oil pipelines, the protective coverings for various high-temperature sewage tanks, and liquid bags for holding hot water, greatly expanding the application range of PVC coated membranes. Detailed Implementation

[0038] The technical solution of the present invention will be clearly and completely described below. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] A high-temperature resistant PVC coating film material includes a polyurethane cloth and a high-temperature resistant PVC underlayer coating and a high-temperature resistant PVC toplayer coating coated on the polyurethane cloth. The high-temperature resistant PVC underlayer coating and the high-temperature resistant PVC toplayer coating are both formed by drying, plasticizing and cooling two layers of high-temperature resistant PVC slurry in sequence.

[0040] In this embodiment, the polyurethane fabric is a mesh fabric made of high-strength, low-shrinkage polyester fiber through plain weave or Panamax weave.

[0041] In this embodiment, the components of the lower layer high-temperature resistant PVC slurry include polyvinyl chloride paste resin, polyvinyl chloride paste resin, diisononyl phthalate, diisodecyl phthalate, stabilizer, filler, pigment, functional additives, and adhesive.

[0042] In this embodiment, the components of the high-temperature resistant PVC slurry in the upper layer include polyvinyl chloride paste resin, polyvinyl chloride paste resin, diisononyl phthalate, trioctyl trimellitate, stabilizer, organotin stabilizer, filler, pigment, and functional additives.

[0043] In this embodiment, the polyvinyl chloride paste resin is selected as a paste resin with a K value of 60 to 80.

[0044] In this embodiment, the stabilizer is selected as a powdered or liquid barium-zinc composite stabilizer.

[0045] In this embodiment, the organotin stabilizer is selected from lauryl esters or maleic esters.

[0046] A high-temperature hot water storage bag is made of the high-temperature resistant PVC coated film material described in any one of the above-mentioned methods.

[0047] Specifically, the surface of the prepared high-temperature hot water storage bag can be further enhanced by coating it with a layer of aerogel to improve its heat preservation performance.

[0048] A method for preparing the high-temperature resistant PVC coated film material as described in any one of the above-mentioned methods, the specific preparation process is as follows:

[0049] Step 1: Prepare the high-temperature resistant PVC coating slurry:

[0050] Premixing involves first adding each plasticizer and stabilizer to a container, then adding PVC paste resin, filler, and functional additives in sequence while stirring. After stirring at high speed until homogeneous, the premixing process is complete.

[0051] Grinding involves grinding the premixed slurry using a three-roll mill, followed by impurity filtration.

[0052] For color matching, add color paste soaked and ground with plasticizer according to the product requirements, stir evenly at high speed, and then perform vacuum stirring to remove bubbles;

[0053] Step 2, coating: The prepared PVC coating slurry is repeatedly scraped and dried on the polyurethane cloth to make all the scraped high-temperature resistant PVC coatings integrally plasticized and molded with the polyurethane cloth.

[0054] Example 1

[0055] This embodiment describes a PVC coating film material resistant to 80℃ high temperature, specifically:

[0056] The main components of the high-temperature resistant PVC slurry in the lower layer are in the following weight proportions:

[0057] Polyvinyl chloride paste resin: 100;

[0058] Diisononyl phthalate: 68;

[0059] Stabilizer: 2.

[0060] The main components of the high-temperature resistant PVC slurry mentioned above are in the following weight parts:

[0061] Polyvinyl chloride paste resin: 100;

[0062] Diisononyl phthalate: 66;

[0063] Barium-zinc liquid stabilizer: 4;

[0064] Polyurethane fabric is a 1000D, 23*23 / inch base fabric made of high-strength, low-shrinkage polyester fiber through plain weaving.

[0065] The preparation method is as follows (the basis weight of the prepared PVC coated film material resistant to 80℃ is 750 g / m²):

[0066] Step 1: Prepare 80℃ high-temperature resistant PVC coating slurry: Add all plasticizers and stabilizers to a container, then add resin, filler, functional additives, etc. in sequence while stirring. Stir at high speed for 10 minutes to complete the premixing. Then grind with a three-roll mill, filter and store in another clean bucket. Next, according to the required color of the product, add color paste soaked and ground with plasticizer, stir at high speed to disperse the system evenly, and finally vacuum stir to degas for 20 minutes. The mixing is complete.

[0067] Step 2, Coating: According to the process requirements, prepare the polyester base fabric and the required high-temperature resistant PVC slurry, and set the oven temperature, scaffold gap, and machine speed. During production, the base fabric first passes through the finishing roller, then through the first and second coatings, with a slurry application rate of 160g / ㎡. The PVC slurry is gelled by heating in the first oven. Adhesive is added to the PVC slurry for the bonding layers 1 and 2. After the third coating, the slurry application rate is 170g / ㎡. The PVC slurry is also gelled by heating in the second oven. Finally, the slurry application rate is 220g / ㎡ by the fourth coating. After drying in the third oven, all the coated PVC slurries are plasticized and bonded to the base fabric. Then, the fabric is calendered, trimmed, and rolled up to obtain a high-temperature resistant PVC coated film.

[0068] Example 2

[0069] This embodiment describes a PVC coating film material resistant to 90℃ high temperature, specifically:

[0070] The main components of the high-temperature resistant PVC slurry in the lower layer are in the following weight proportions:

[0071] Polyvinyl chloride paste resin: 100;

[0072] Diisononyl phthalate: 44;

[0073] Diisophthalate: 24;

[0074] Stabilizer: 2.5.

[0075] The main components of the high-temperature resistant PVC slurry mentioned above are in the following weight parts:

[0076] Polyvinyl chloride paste resin: 100;

[0077] Diisononyl phthalate: 33;

[0078] Trioctyl trimellitate: 36;

[0079] Barium-zinc liquid stabilizer: 5;

[0080] Polyurethane fabric is a 1000D, 30*32 / inch base fabric made of high-strength, low-shrinkage polyester fiber through Panama weaving.

[0081] The preparation method is as follows (the basis weight of the prepared PVC coated film material resistant to 90℃ is 950 g / m²):

[0082] Step 1: Prepare a 90℃ high-temperature resistant PVC coating slurry: Add all plasticizers and stabilizers to a container, then add resin, filler, functional additives, etc. in sequence while stirring. Stir at high speed for 10 minutes to complete the premixing. Then grind the mixture using a three-roll mill, filter it, and store it in another clean container. Next, add the color paste that has been soaked and ground with plasticizer according to the required color of the product. Stir at high speed to disperse the system evenly. Finally, vacuum stir and degas for 20 minutes to complete the mixing process.

[0083] Step 2, Coating: According to the process requirements, prepare the polyester base fabric and the required high-temperature resistant PVC slurry, and set the oven temperature, scaffold gap, and machine speed. During production, the base fabric first passes through the finishing roller, then through the first and second coatings, with a slurry application rate of 230g / ㎡. The PVC slurry is dried and gelled in the first oven. Adhesive is added to the PVC slurry in the first and second bonding layers. After the third coating, the slurry application rate is 200g / ㎡. The PVC slurry is dried and gelled in the second oven as well. Finally, the slurry application rate is 250g / ㎡ in the fourth coating. After drying in the third oven, all the coated PVC slurries are plasticized and bonded to the base fabric. Then, the fabric is calendered, trimmed, and rolled up to obtain a high-temperature resistant PVC coated film.

[0084] Example 3

[0085] This embodiment describes a PVC coating film material resistant to 100℃ high temperature, specifically:

[0086] The main components of the high-temperature resistant PVC slurry in the lower layer are in the following weight proportions:

[0087] Polyvinyl chloride paste resin: 100;

[0088] Diisononyl phthalate: 33;

[0089] Diisophthalate: 36;

[0090] Stabilizer: 3.

[0091] The main components of the high-temperature resistant PVC slurry mentioned above are in the following weight parts:

[0092] Polyvinyl chloride paste resin: 100;

[0093] Diisononyl phthalate: 22;

[0094] Trioctyl trimellitate: 48;

[0095] Barium-zinc liquid stabilizer: 5;

[0096] Organotin dilaurate stabilizer: 1.

[0097] Polyurethane fabric is a 1300D, 30*32 / inch base fabric made from high-strength, low-shrinkage polyester fiber through Panama weaving.

[0098] The preparation method is as follows (the basis weight of the prepared PVC coated film material resistant to 100℃ is 1100g / ㎡):

[0099] Step 1: Prepare a 100℃ high-temperature resistant PVC coating slurry: Add all plasticizers and stabilizers to a container, then add resin, filler, functional additives, etc. in sequence while stirring. Stir at high speed for 10 minutes to complete the premixing. Then grind the mixture using a three-roll mill, filter it, and store it in another clean container. Next, add the color paste that has been soaked and ground with plasticizer according to the required color of the product. Stir at high speed to disperse the system evenly. Finally, vacuum stir and degas for 20 minutes to complete the mixing process.

[0100] Step 2, Coating: According to the process requirements, prepare the polyester base fabric and the required high-temperature resistant PVC slurry, and set the oven temperature, doctor blade gap, and machine speed. During production, the base fabric first passes through the finishing roller, then through the first and second coatings, with a slurry application rate of 280g / ㎡. The PVC slurry is dried and gelled in the first oven. Adhesive is added to the PVC slurry in the bonding layers 1 and 2. After the third coating, the slurry application rate is 210g / ㎡. The PVC slurry is dried and gelled in the second oven as well. Finally, the slurry application rate is 240g / ㎡ in the fourth coating. After drying in the third oven, all the coated PVC slurries are plasticized and bonded to the base fabric. Then, the fabric is calendered, trimmed, and rolled up to obtain a high-temperature resistant PVC coated film.

[0101] The temperature resistance test involved in this invention was conducted according to FZ / T 01008-2008 "Determination of Heat Resistance of Coated Fabrics to Air Aging". The test results are shown in Table 1 below.

[0102] Table 1. Test results of Examples 1-3 and ordinary PVC coated films at various temperature resistances.

[0103]

[0104] As can be seen from Table 1, the weight loss of Examples 1 to 3 at the corresponding high temperatures is similar to that of ordinary membrane materials, and the membrane materials are all soft and do not harden, indicating that the membrane materials meet the requirements for high temperature resistance.

[0105] This invention modifies a PVC coating slurry using high-temperature resistant plasticizers diisophthalate and trioctyl trimellitate, and then directly applies a high-temperature resistant PVC undercoat and topcoat coating to a polyester base fabric via knife coating to obtain a high-temperature resistant PVC coated membrane. The technical solution of this invention provides a PVC coated membrane with high temperature resistance, usable at temperatures ranging from 70℃ to 100℃, significantly expanding the application range of PVC coated membranes. It can be widely used in high-temperature fields and applications, such as protective covers for high-temperature sewage tanks, coverings for high-temperature oil pipelines, as well as high-temperature flexible water bags and water cellars.

[0106] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-temperature resistant PVC coated film material, characterized in that: It includes polyurethane fabric and a high-temperature resistant PVC undercoat and a high-temperature resistant PVC topcoat coated on the polyurethane fabric. The high-temperature resistant PVC undercoat and the high-temperature resistant PVC topcoat are formed by drying, plasticizing and cooling two layers of high-temperature resistant PVC slurry in sequence.

2. The high-temperature resistant PVC coated film material according to claim 1, characterized in that: The polyurethane fabric is a mesh fabric made of high-strength, low-shrinkage polyester fiber through plain weave or Panamax weave.

3. The high-temperature resistant PVC coated film material according to claim 1, characterized in that: The components of the lower layer of high-temperature resistant PVC slurry include polyvinyl chloride paste resin, polyvinyl chloride paste resin, diisononyl phthalate, diisodecyl phthalate, stabilizer, filler, pigment, functional additives, and binder, wherein the weight parts of the main components are: Polyvinyl chloride paste resin: 100; Diisononyl phthalate: 30-70; Diisodecyl phthalate: 0-40; Stabilizer: 1-3.

4. The high-temperature resistant PVC coated film material according to claim 1, characterized in that: The components of the high-temperature resistant PVC slurry mentioned above include polyvinyl chloride paste resin, polyvinyl chloride paste resin, diisononyl phthalate, trioctyl trimellitate, stabilizer, organotin stabilizer, filler, pigment, and functional additives. The weight percentages of the main components are as follows: Polyvinyl chloride paste resin: 100; Diisononyl phthalate: 20-70; Trioctyl trimellitate: 0–50; Stabilizer: 3-6; Organotin stabilizer: 0-2.

5. A high-temperature resistant PVC coated film material according to claims 3 and 4, characterized in that: The polyvinyl chloride paste resin is selected from paste resins with a K value of 60 to 80.

6. A high-temperature resistant PVC coated film material according to claims 3 and 4, characterized in that: The stabilizer is selected as a powdered or liquid barium-zinc composite stabilizer.

7. The high-temperature resistant PVC coated film material according to claim 4, characterized in that: The organotin stabilizer is selected from lauryl esters or maleate esters.

8. A high-temperature hot water storage bag, characterized in that: It is made of the high-temperature resistant PVC coated film material as described in any one of claims 1-7.

9. A method for preparing the high-temperature resistant PVC coated film material according to any one of claims 1-7, characterized in that: The specific preparation process is as follows: Step 1: Prepare the high-temperature resistant PVC coating slurry: Premixing involves first adding each plasticizer and stabilizer to a container, then adding PVC paste resin, filler, and functional additives in sequence while stirring. After stirring at high speed until homogeneous, the premixing process is complete. Grinding involves grinding the premixed slurry using a three-roll mill, followed by impurity filtration. For color matching, add color paste soaked and ground with plasticizer according to the product requirements, stir evenly at high speed, and then perform vacuum stirring to remove bubbles; Step 2, coating: The prepared PVC coating slurry is repeatedly scraped and dried on the polyurethane cloth to make all the scraped high-temperature resistant PVC coatings integrally plasticized and molded with the polyurethane cloth.

10. The method for preparing a high-temperature resistant PVC coated film according to claim 9, characterized in that: In step two, the high-temperature resistant PVC coating slurry undergoes four coats and three drying processes, specifically: The amount of slurry applied for the first and second coats is 100g / ㎡~300g / ㎡, and an adhesive should be added between the first and second coats. The amount of sizing applied in the third coat is 100g / ㎡~400g / ㎡; The amount of sizing applied for the fourth coat is 100g / ㎡~500g / ㎡; After the second, third, and fourth coats, the paint must be dried in an oven.

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