CN115093652A - Composition for enhancing joint peeling strength of PVC-P waterproof coiled material and application thereof - Google Patents

Composition for enhancing joint peeling strength of PVC-P waterproof coiled material and application thereof Download PDF

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Publication number
CN115093652A
CN115093652A CN202210632306.3A CN202210632306A CN115093652A CN 115093652 A CN115093652 A CN 115093652A CN 202210632306 A CN202210632306 A CN 202210632306A CN 115093652 A CN115093652 A CN 115093652A
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pvc
temperature
coiled material
resin layer
pvc resin
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CN115093652B (en
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王聪迪
郭龙
缪线生
曹进明
吴帅
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Suzhou Zhuobao Tech Co ltd
Shenzhen Zhuobao Technology Co Ltd
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Suzhou Zhuobao Tech Co ltd
Shenzhen Zhuobao Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/026—Knitted fabric
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K

Abstract

The invention discloses a composition for enhancing the joint peeling strength of a PVC-P waterproof coiled material and application thereof, wherein the dosage of a plasticizer in a formula is adjusted, polyester warp-knitted cloth twisted longitudinally and transversely is used as an inner reinforcing material, a hot air heating device is arranged at the covering position of the coiled material, the forming temperature of the coiled material is adjusted, and the like, so that the joint peeling strength of the PVC-P waterproof coiled material is improved to be far higher than that of GB 12952-2011 while the requirements on other physical properties in GB 12952-2011 are met, and the market competitiveness of a waterproof coiled material product is improved.

Description

Composition for enhancing joint peeling strength of PVC-P waterproof coiled material and application thereof
Technical Field
The invention relates to the technical field of waterproof coiled materials, in particular to a composition for enhancing the joint peeling strength of a PVC-P waterproof coiled material, and also relates to application of the composition, specifically to a method for preparing a PVC-P waterproof coiled material by using the composition and the prepared PVC-P waterproof coiled material.
Background
Polyvinyl chloride (PVC), which is an organic polymer compound that is ubiquitous in life, is mostly made of PVC as a raw material, such as plastic cups, plastic bags, various water pipes, electric wires and the like. The most common of polyvinyl chloride products applied to the building field are various types of pipes, cables and waterproof coiled materials. The polyvinyl chloride (PVC) waterproof roll is a sheet waterproof roll which is prepared by using polyvinyl chloride resin as a main raw material, blending a modifier, a plasticizer and the like, and then performing processes such as kneading, extrusion, calendering and the like. Such waterproof rolls can be classified into the following five types: homogeneous polyvinyl chloride waterproof rolls (class H), polyvinyl chloride waterproof rolls with fiber backings (class L), reinforced polyvinyl chloride-like waterproof rolls in fabrics (class P), polyvinyl chloride waterproof rolls with glass fiber internal reinforcement (class G), and polyvinyl chloride waterproof rolls with fiber backings in glass fiber internal reinforcement (class GL).
The PVC-P waterproof coiled material is a thermoplastic PVC coiled material, and the coiled material is a high-molecular coiled material formed by combining a double-sided polyvinyl chloride plastic layer and a middle polyester reinforcing rib into a whole through a special extrusion compounding or coating process by taking a polyester fiber fabric as the reinforcing rib. The coiled material has the advantages of high tensile strength, good dimensional stability, high mechanical strength, erosion resistance, root permeability resistance, weather resistance and ultraviolet resistance. The PVC-P waterproof coiled material is widely applicable to various roof waterproof in industry and construction industry, and building waterproof engineering such as basement, reservoir, dam, highway tunnel, railway tunnel, air-raid shelter, grain depot, garbage plant, wastewater treatment and the like.
The joint peeling strength is the maximum strength when the lap joint of the coiled material and the coiled material is torn, and the performance of the coiled material is reflected. The peeling strength of the qualified PVC-P waterproof coiled material meets the requirement of GB 12952-2011, namely the peeling strength is more than or equal to 3.0N/mm. The existing waterproof coiled material has the defects of single raw material formula, simple process and poor joint peeling strength after construction, and when a base layer expands, the base layer can be pulled away at a lap joint part, so that the lap joint is invalid, water seepage occurs at the joint part, and a waterproof layer of a building faces severe challenge and even is damaged. Therefore, in order to achieve the seam peel strength required by GB 12952-2011, improvements in existing formulations and processes are required.
Disclosure of Invention
In order to improve the joint peeling strength of the PVC-P waterproof coiled material to be more than 3.0N/mm specified in GB 12952-2011, the formula and the process of the conventional waterproof coiled material are researched, and the PVC-P waterproof coiled material is obtained by adjusting the dosage of the plasticizer in the formula, matching the longitudinally and transversely twisted polyester warp knitted fabric serving as an inner reinforcing material, arranging a hot air heating device at the composite position of the PVC resin layer and the longitudinally and transversely twisted polyester warp knitted fabric, adjusting the production parameters such as the forming temperature of the coiled material and the like, wherein the joint peeling strength of the PVC-P waterproof coiled material is far higher than the requirement of GB 12952-2011.
In order to realize the purpose, the technical scheme provided by the invention is as follows:
a composition for enhancing the joint peeling strength of a PVC-P waterproof coiled material comprises the following components in parts by weight:
Figure BDA0003676888470000021
plasticizer molecules can be inserted among polyvinyl chloride molecular chains, the polar parts of the plasticizer act with the polar parts of the polyvinyl chloride, after cooling, the plasticizer molecules are left on the insertion positions, and the nonpolar parts of the plasticizer play a role in isolation, so that the acting force among the polyvinyl chloride molecules is weakened, and the purposes of improving the plasticity and the flexibility of the polyvinyl chloride and reducing the processing temperature of the polyvinyl chloride are achieved; the polar part of the plasticizer molecule is mainly ester group, epoxy group, ether bond, cyano-group, chlorine group and other polar groups; the nonpolar portion is mainly a methylene chain and an alkyl chain. The plasticizer is selected from phthalate, linear ester, epoxy, phosphate and the like, wherein the phthalate has excellent compatibility with PVC, DOP plasticizer (dioctyl phthalate) and DIDP (didecyl phthalate) are taken as representatives of the phthalate, and the DOP has the characteristics of good compatibility with PVC resin, high plasticizing efficiency, low volatility and good low-temperature flexibility, but tertiary hydrogen on the molecular structure is easy to be attracted by hydroxyl and oxidized and decomposed, so that the resin material plasticized by only using DOP has poor aging resistance. DIDP has the same polar structure as DOP, and has no redundant branched chain relative to the non-polar part of DOP, so that the DIDP plays the same plasticizing role as DOP and can endow the material with stronger aging resistance. In order to meet the requirements of high efficiency, aging resistance, low volatility and economy of PVC resin plasticizers, DOP and DIDP are compounded to form a composite plasticizer, and when the combined mass ratio is DOP: DIDP is 1: (1.5-4) the relative efficiency value of the compound plasticizer is 0.73-0.77, which shows that the compound plasticizer has good plasticizing effect at the ratio. It should be noted that the amount of the compound plasticizer affects the plasticizing effect of the PVC resin, too much plasticizer will cause the combination strength of the upper and lower layers of the PVC-P product to be greatly reduced, too little plasticizer will affect the plasticizing effect of the PVC resin to cause the overall performance of the material to be reduced, and the DOP and DIDP plasticizers can be purchased from the market, for example, from co-chemical industries ltd.
Preferably, the mass ratio of the polyvinyl chloride resin to the composite plasticizer is (2.3-2.8): 1.
further preferably, the filler is one or more of talc powder, heavy calcium carbonate and light calcium carbonate. The inorganic filler is added into PVC as an extender to reduce the cost of the product, and the molecular chain of the PVC can not occupy the whole original space due to the existence of the filler, so that the connected chain segments are fixed to a certain degree. Due to the dimensional stability of the filler, in the filled polymer, the molecular chain movement in the polymer interfacial region is restricted, so that the glass transition temperature is increased, the heat distortion temperature is increased, the shrinkage rate is reduced, and the elastic modulus, the hardness, the rigidity and the impact strength are improved.
Further preferably, the particle size of the filler is 1200-1300 meshes, and the larger the mesh number is, the finer the particle size is, the larger the specific surface area is, and the larger the oil absorption value is.
Further preferably, the titanium dioxide is rutile type, the titanium dioxide is added into PVC to effectively improve the heat resistance, light resistance and weather resistance of the plastic product, improve the physical and chemical properties of the plastic product and prolong the service life, and the rutile type titanium dioxide can be purchased from markets, such as R105 produced by DuPont Chinese group Limited company.
Further preferably, the polyvinyl chloride resin has an average polymerization degree of 1250-1350 and belongs to the PVC-SG3 type. According to the regulations of national standard GB/T5761-93 general type PVC resin inspection Standard for suspension method, PVC for suspension method is divided into eight resins of PVC-SGl to PVC-SG8, wherein the smaller the serial number is, the larger the polymerization degree is, the larger the molecular weight is, the higher the strength is, but the more difficult the melt flow is, the more difficult the processing is. When the soft product is selected, PVC-SGl, PVC-SG2 and PVC-SG3 types are generally used; for processing hard products, PVC-SG4, PVC-SG5, PVC-SG6, PVC-SG7 and PVC-SG8 are generally used.
In addition, the invention also provides a method for preparing the PVC-P waterproof coiled material by using the composition, which comprises the following steps:
(1) mixing materials: the polyvinyl chloride resin, the composite plasticizer, the titanium dioxide and the colorant are subjected to hot mixing, when the temperature of a system reaches 80-85 ℃, the filler is added for continuous mixing, and when the temperature of the system reaches 100-115 ℃, the filler is subjected to cold mixing to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together;
(4) forming a coiled material: and compounding the pressed PVC resin and polyester warp-knitted cloth with another PVC resin layer to form the waterproof roll with the upper PVC resin layer, the middle longitudinally and transversely twisted polyester warp-knitted cloth and the lower PVC resin layer.
The hot mixing in the step (1) is also called high mixing, namely, the materials are mixed by a high-speed mixer, the materials are called hot mixing because the materials generate a large amount of heat due to mutual friction during high-speed mixing, and the uniform mixing of the materials is mainly realized by the hot mixing; in order to prevent the material from being partially plasticized at the temperature of more than 100 ℃ in advance to cause material agglomeration after hot mixing, the material needs to be transferred to a low-speed mixer for cooling so as to keep the material in a powdery state and facilitate feeding production, and the cold mixing is carried out at this stage.
Preferably, the temperature of the conveying section of the screw of the extruder is 165-170 ℃, the temperature of the compression section is 180-185 ℃, and the temperature of the homogenization section is 175-180 ℃.
Preferably, in the step (3), the linear speed of the press rolls is 1-1.5m/min, the coil forming temperature is 50-60 ℃, and the distance between the press rolls is 1-1.5 mm.
Preferably, the step (3) includes providing a hot air heating device at a position where the PVC resin layer is combined with the polyester warp knitting fabric twisted in the longitudinal and transverse directions, so that the warp knitting fabric is more easily embedded into the PVC resin layer, and the upper and lower layer bonding strength of the PVC-P material is also better in a high temperature state.
Preferably, the power of the hot air heating device is 1800W-2200W.
Preferably, the temperature of the hot air heating device is 200-250 ℃.
The production process is based on the characteristics and combination of the raw materials in the formula of the invention, and a large number of experiments and specific settings are carried out, so that the joint peeling strength of the PVC-P waterproof coiled material can be obviously enhanced.
In addition, the invention also provides a PVC-P waterproof coiled material prepared by the composition through the method.
In the invention, the polyester warp-knitted fabric twisted longitudinally and transversely is used as the internal reinforcing fabric, so that the effect on the combination of upper and lower resin materials is small on the premise of playing a better internal reinforcing effect, the warp-knitted fabric without twisting can cause the dispersion of the longitudinal and transverse warp-knitted fabrics when the upper and lower resin materials are combined, and the warp-knitted fabric can occupy the combined area of the upper and lower resin materials after the longitudinal and transverse dispersion to cause the reduction of the combined strength.
In conclusion, the beneficial effects of the invention are as follows:
compared with the prior art, through a great deal of experimental research, the inventor of the invention adjusts the dosage of the plasticizer in the formula, uses the polyester warp-knitted cloth twisted longitudinally and transversely as the inner reinforcing material, sets a hot air heating device at the composite position of the PVC resin layer and the polyester warp-knitted cloth twisted longitudinally and transversely, adjusts the forming temperature of the coiled material and other methods, and improves the joint peeling strength of the PVC-P waterproof coiled material to be far higher than the requirement of GB 12952-2011 while meeting the requirements of other physical properties in GB 12952-2011. The added plasticizer not only can enable the upper layer resin material and the lower layer resin material to be well combined, but also has small influence on the plasticizing effect of the PVC resin; by adopting the polyester warp-knitted cloth twisted longitudinally and transversely, the resin materials on the upper layer and the lower layer can achieve good combination effect, so that the peeling strength of the joint is enhanced; the hot air heating device is arranged at the composite position of the PVC resin layer and the polyester warp-knitted cloth twisted longitudinally and transversely, so that the warp-knitted cloth is easier to be embedded into the PVC resin layer, and the seam peeling strength of the waterproof coiled material is improved. The invention has low cost of raw materials and simple production process, can be produced in large scale and is beneficial to wide application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The starting materials used in the following examples are all commercially available, unless otherwise specified.
Wherein the content of the first and second substances,
DOP plasticizers were purchased from Union chemical industries, Inc.
The DIDP plasticizer was purchased from Union chemical industries, Inc.
Titanium dioxide was purchased from R105, dupont, usa.
The colorant was carbon black, which was purchased from N330, produced by panther, Inc., Jiangxi.
The filler for the following examples is light calcium, which is 1250 mesh.
The polyester warp-knitted fabric twisted in the longitudinal and transverse directions was purchased from Zhejiang super da New materials GmbH.
Examples of the invention
Inventive example 1
The quantities of the components of the composition are shown in the following table 1, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 180 ℃, and the temperature of a homogenizing section of each screw extruder is 175 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and polyester warp-knitted cloth twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.1 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 210 ℃, the power of the hot air blowing is 2200kW, the linear speed of a pressing roll is 1.1m/min, the forming temperature of a coiled material is 55 ℃, the forming thickness is 1.5mm, and the waterproof coiled material with the upper layer of the PVC resin layer, the middle layer of the PVC warp knitted fabric twisted longitudinally and transversely and the lower layer of the PVC resin layer is marked as A1.
Inventive example 2
The amounts of the components of the composition are shown in the following table 1, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 85 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 185 ℃, and the temperature of a homogenizing section of each screw extruder is 180 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.1 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 208 ℃, the power of the hot air blowing is 2200kW, the linear speed of a pressing roll is 1.1m/min, the forming temperature of a coiled material is 55 ℃, the forming thickness is 1.2mm, and the waterproof coiled material with the upper layer of the PVC resin layer, the middle layer of the PVC warp knitted fabric twisted longitudinally and transversely and the lower layer of the PVC resin layer is marked as A2.
Inventive example 3
The quantities of the components of the composition are shown in the following table 1, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 110 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 170 ℃, the temperature of a compression section of each screw extruder is 185 ℃, and the temperature of a homogenizing section of each screw extruder is 180 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.3 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and polyester warp-knitted fabric with another PVC resin layer, and arranging hot air blower at the compounding position, wherein the temperature of the hot air blower is 210 ℃, the power of the hot air blower is 2200kW, the linear speed of a compression roller is 1.3m/min, the forming temperature of a coiled material is 55 ℃, and the forming thickness is 1.4 mm. The waterproof roll material with the upper layer of the PVC resin layer, the middle layer of the PVC resin layer and the lower layer of the PVC resin layer is marked with A3.
Inventive example 4
The amounts of the components of the composition are shown in the following table 1, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 180 ℃, and the temperature of a homogenizing section of each screw extruder is 175 ℃.
(3) Rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.3 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 220 ℃, the power of the hot air blowing is 2200kW, the linear speed of a press roll is 1.3m/min, the forming temperature of a coiled material is 50 ℃, the forming thickness is 1.3mm, and the waterproof coiled material with the upper layer being the PVC resin layer, the middle being the polyester warp knitted fabric twisted longitudinally and transversely and the lower layer being the PVC resin layer is prepared and is marked as A4.
Inventive example 5
The amounts of the components of the composition are shown in the following table 1, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 170 ℃, the temperature of a compression section of each screw extruder is 185 ℃, and the temperature of a homogenizing section of each screw extruder is 180 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.1 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 225 ℃, the power of the hot air blowing is 2200kW, the linear speed of a press roll is 1.1m/min, the forming temperature of a coiled material is 50 ℃, the forming thickness is 1.4mm, and the waterproof coiled material with the upper layer being the PVC resin layer, the middle being the polyester warp knitted fabric twisted longitudinally and transversely and the lower layer being the PVC resin layer is prepared and is marked as A5.
Inventive example 6
The amounts of the components of the composition are shown in the following table 1, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 105 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 185 ℃, and the temperature of a homogenizing section of each screw extruder is 175 ℃.
(3) Rolling: and (3) pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.1 m/min.
(4) Forming a coiled material: compounding the pressed PVC resin and polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 240 ℃, the power of the hot air blowing is 2200kW, the linear speed of a press roll is 1.1m/min, the forming temperature of a coiled material is 60 ℃, the forming thickness is 1.5mm, and the waterproof coiled material with the upper layer being the PVC resin layer, the middle layer being the polyester warp knitted fabric twisted longitudinally and transversely and the lower layer being the PVC resin layer is prepared and is marked as A6.
TABLE 1 amounts of the components of examples 1-6
Figure BDA0003676888470000081
Comparative example 1
The amounts of the components of the composition are shown in the following table 2, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 180 ℃, and the temperature of a homogenizing section of each screw extruder is 175 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and untwisted polyester warp-knitted fabric together, wherein the linear speed of a press roll is 1.1 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and untwisted polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 210 ℃, the power of the hot air blowing is 2200kW, the linear speed of a pressing roll is 1.1m/min, the forming temperature of a coiled material is 55 ℃, the forming thickness is 1.5mm, and the waterproof coiled material with the upper layer being the PVC resin layer, the middle layer being the untwisted polyester warp knitted fabric and the lower layer being the PVC resin layer is prepared and is marked as B1.
Comparative example 2
The amounts of the components of the composition are shown in the following table 2, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 110 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 180 ℃, and the temperature of a homogenization section of each screw extruder is 175 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted in the longitudinal direction and the transverse direction together;
(4) forming a coiled material: compounding the pressed PVC resin layer and polyester warp knitted fabric with another PVC resin layer at a compression roller linear speed of 1.1m/min, a coil forming temperature of 60 ℃ and a forming thickness of 1.5mm to obtain a waterproof coil material with an upper PVC resin layer, a middle longitudinally and transversely twisted polyester warp knitted fabric and a lower PVC resin layer, and recording the waterproof coil material as B2.
Comparative example 3
The amounts of the components of the composition are shown in the following table 2, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 185 ℃, and the temperature of a homogenizing section of each screw extruder is 175 ℃;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and polyester warp-knitted cloth twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.2 m/min;
(4) forming a coiled material: compounding the pressed PVC resin and polyester warp knitted fabric with another PVC resin layer, arranging hot air blowing at the compounding position, wherein the temperature of the hot air blowing is 215 ℃, the power of the hot air blowing is 2200kW, the linear speed of a pressing roll is 1.4m/min, the forming temperature of a coiled material is 55 ℃, the forming thickness is 1.2mm, and the waterproof coiled material with the upper layer being the PVC resin layer, the middle being the polyester warp knitted fabric twisted longitudinally and transversely and the lower layer being the PVC resin layer is prepared and is marked as B3.
Comparative example 4
The amounts of the components of the composition are shown in the following table 2, and the production of the waterproof roll comprises the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and carbon black, adding light calcium to continuously mix when the temperature of a system reaches 80 ℃, and cold mixing when the temperature of the system reaches 115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers, wherein the temperature of a conveying section of each screw extruder is 165 ℃, the temperature of a compression section of each screw extruder is 185 ℃, and the temperature of a homogenizing section of each screw extruder is 180 ℃;
(3) rolling: and (3) pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together, wherein the linear speed of a press roll is 1.1 m/min.
(4) Forming a coiled material: and compounding the pressed PVC resin and polyester warp-knitted cloth with another PVC resin layer to form the waterproof roll with the upper PVC resin layer, the middle polyester warp-knitted cloth and the lower PVC resin layer.
Arranging hot air blowing at the composite position of the PVC resin layer and the polyester warp knitted fabric twisted longitudinally and transversely, wherein the temperature of the hot air blowing is 210 ℃, the power of the hot air blowing is 2200kW, the linear speed of a compression roller is 1.3m/min, the forming temperature of a coiled material is 55 ℃, the forming thickness is 1.4mm, the upper layer is the PVC resin layer, the middle layer is the polyester warp knitted fabric twisted longitudinally and transversely, and the lower layer is the waterproof coiled material of the PVC resin layer, which is marked as B4.
TABLE 2 comparative examples 1-4 amounts of components in compositions
Figure BDA0003676888470000111
Performance testing
The waterproof rolls obtained in inventive examples 1 to 6 and comparative examples 1 to 4 were subjected to the following performance tests.
Peel strength: the test is carried out according to GB 12952-2011, when the hollow drum shelling is generated, the hollow shell is cut off by a knife immediately, and the average peeling force of the second half of the tensile stress strain curve is taken to calculate the peeling strength.
The maintenance conditions of the waterproof roll are as follows: the temperature is 23 ℃ plus or minus 2 ℃, the humidity is 60 percent plus or minus 15 percent, after curing is carried out for 24 hours, observation is carried out, the surface of the sheet is flat, the edge is neat, no crack, no cavity, no adhesion, no bubble and no scar exist, then a seam stripping performance test is carried out, and the test result is shown in table 3.
Table 3 results of performance testing
Item Peel strength/N/mm
A1 4.5
A2 3.7
A3 4.3
A4 4.0
A5 4.2
A6 4.6
B1 3.2
B2 3.7
B3 2.6
B4 1.7
And (4) summarizing: compared with the comparative example 1, the comparative example 1 has lower peel strength than the example 1, and it is known whether the twisted polyester warp knitting cloth has a great influence on the seam peel strength of the prepared coiled material, and the polyester warp knitting cloth twisted longitudinally and transversely can better cover the upper layer and the lower layer to increase the seam peel strength;
comparing the example 1 with the comparative example 2, the peeling strength of the comparative example 2 is reduced compared with that of the example 1, which shows that the hot air heating device is arranged at the composite position of the PVC resin layer and the polyester warp-knitted fabric twisted in the longitudinal direction and the transverse direction, so that the peeling strength of the seam of the coiled material is improved to a certain extent;
comparing example 1 with comparative example 3, the production process of example 1 is the same as that of comparative example 3, but the formulation of the PVC resin layer in comparative example 3 uses more compound type plasticizer, the peel strength of the seam in comparative example 3 is reduced to be lower than 3.0N/mm required by GB 12952-2011, because the lubrication action exists between the upper layer and the lower layer of the waterproof coiled material due to the increase of the plasticizer, so that the waterproof coiled material cannot be well covered;
comparing example 1 with comparative example 4, the production process of example 1 is the same as that of comparative example 3, but less composite plasticizer is used in the formulation of the PVC resin layer in comparative example 3, and the peel strength of the seam in comparative example 3 is reduced significantly compared with that in example 1, which is much lower than 3.0N/mm required by GB 12952-2011, because the plasticizer is reduced to make the waterproof roll material insufficiently plasticized and have lower overall mechanical properties.
Therefore, the method for preparing the PVC-P waterproof coiled material can well improve the joint peeling strength of the PVC-P coiled material.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. The composition for enhancing the joint peeling strength of the PVC-P waterproof coiled material is characterized by comprising the following components in parts by weight:
Figure FDA0003676888460000011
2. the composition for enhancing the seam peel strength of the PVC-P waterproof coiled material according to claim 1, wherein the mass ratio of the polyvinyl chloride resin to the composite plasticizer is (2.3-2.8): 1.
3. The composition for enhancing seam peel strength of PVC-P type waterproof rolls according to claim 1, wherein said compound plasticizer comprises DOP and DIDP, wherein the mass ratio of DOP: DIDP is 1: (1.5-4).
4. The composition for enhancing the seam peel strength of PVC-P type waterproofing membrane according to claim 1, wherein the filler is one or more of talcum powder, heavy calcium carbonate and light calcium carbonate.
5. The composition for enhancing the joint peel strength of the PVC-P waterproof coiled material as claimed in claim 1, wherein the particle size of the filler is 800-1300 meshes.
6. A process for the preparation of PVC-P waterproofing rolls using the composition according to any of claims 1 to 6, characterized by comprising the following steps:
(1) mixing materials: hot mixing polyvinyl chloride resin, a composite plasticizer, titanium dioxide and a colorant, adding a filler to continuously mix when the temperature of a system reaches 80-85 ℃, and cold mixing when the temperature of the system reaches 100-115 ℃ to obtain a material;
(2) plasticizing and extruding: respectively adding the materials prepared in the step (1) into different screw extruders for plasticizing and extruding to respectively prepare two PVC resin layers;
(3) rolling: pressing the PVC resin layer obtained in the step (2) and the polyester warp-knitted fabric twisted longitudinally and transversely together;
(4) forming a coiled material: and compounding the pressed PVC resin layer and polyester warp-knitted cloth with another PVC resin layer to form the waterproof roll with the upper PVC resin layer, the middle polyester warp-knitted cloth twisted longitudinally and transversely and the lower PVC resin layer.
7. The method for preparing PVC-P waterproof roll as claimed in claim 6, wherein the temperature of the conveying section of the screw extruder is 165-170 ℃, the temperature of the compression section is 180-185 ℃, and the temperature of the homogenization section is 175-180 ℃.
8. The method for preparing PVC-P waterproof roll according to claim 6, wherein the step (3) and the step (4) of pressing the PVC resin layer and the polyester warp-knitted fabric twisted in the longitudinal and transverse directions together are performed by means of three-roll calendering, wherein the linear speed of the press roll is 1-1.5m/min, the roll forming temperature is 50-60 ℃, and the distance between the press rolls is 1-1.5 mm.
9. The method for preparing PVC-P waterproof roll according to claim 6, wherein the step (3) comprises arranging a hot air heating device at the compounding position of the PVC resin layer and the polyester warp-knitted fabric twisted in the longitudinal and transverse directions.
10. A PVC-P type waterproofing membrane prepared by the composition according to any one of claims 1 to 6, comprising an upper PVC resin layer, a lower PVC resin layer and an inner reinforcing layer fabric disposed between the upper and lower PVC resin layers, wherein the inner reinforcing layer fabric is a polyester warp knit twisted in the longitudinal and transverse directions.
CN202210632306.3A 2022-06-02 2022-06-02 Composition for enhancing joint peeling strength of PVC-P waterproof coiled material and application thereof Active CN115093652B (en)

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