CN110696458A - Isolating membrane for self-adhesive waterproof roll and preparation method thereof - Google Patents

Isolating membrane for self-adhesive waterproof roll and preparation method thereof Download PDF

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Publication number
CN110696458A
CN110696458A CN201910174734.4A CN201910174734A CN110696458A CN 110696458 A CN110696458 A CN 110696458A CN 201910174734 A CN201910174734 A CN 201910174734A CN 110696458 A CN110696458 A CN 110696458A
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film
surface layer
stretching
self
temperature
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张启纲
苏醒
李沅鸿
王果连
李国庆
郑明伟
王飞龙
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Shanghai ceyuan New Material Technology Co.,Ltd.
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SHANGHAI AOTI NEW MATERIAL TECHNOLOGY CONSULTING Co Ltd
Henan Silver Kingdom New Materials Ltd By Share Ltd
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Priority to CN201910174734.4A priority Critical patent/CN110696458A/en
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    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • 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
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/244—All polymers belonging to those covered by group B32B27/36
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2205/00—Polymer mixtures characterised by other features
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
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  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

The invention relates to an isolating membrane for a self-adhesive waterproof coiled material and a preparation method thereof, belonging to the technical field of production and manufacturing of thin films. The film consists of an upper surface layer, a core layer and a lower surface layer; the upper surface layer is composed of PETG and SiO-containing2The anti-caking agent is composed of PETG master batch,the core layer consists of PET, SEBS thermoplastic elastomer and PE-g-MAH, and the lower surface layer consists of PETG. The preparation method comprises the steps of mixing the raw materials according to the formula of each layer, respectively melting by three sets of extrusion systems, vacuumizing, filtering, extruding, converging the three melts to a T-shaped die head, extruding a cast sheet, and performing bidirectional stretching, shaping, traction, rolling and slitting to obtain the self-adhesive isolating membrane for the waterproof coiled material. The prepared isolating membrane for the waterproof coiled material has the advantages of high strength, good toughness, good barrier property, easy peeling, excellent printing performance and coating performance, and can be subjected to various printing or spraying without any special treatment on the surface, thereby completely meeting the use requirements of the isolating membrane for the waterproof coiled material.

Description

Isolating membrane for self-adhesive waterproof roll and preparation method thereof
Technical Field
The invention relates to an isolating membrane for a self-adhesive waterproof coiled material and a preparation method thereof, belonging to the technical field of production and manufacturing of thin films.
Background
With the rapid development of national economy in China, not only industrial buildings and civil buildings have requirements on various high-quality waterproof materials, but also the requirements on the waterproof materials in the fields of bridges, tunnels, national defense and military industry, agricultural water conservancy, transportation and the like are further improved, and the domestic waterproof market demand is quite large. In recent years, although some novel waterproof materials appear, the overall waterproof pattern mainly comprising a high polymer modified asphalt waterproof coiled material, a high polymer waterproof coiled material and a waterproof coating is not changed, and the waterproof coiled material is still in a leading position in the application of the building waterproof material in China and accounts for about 60 percent of the waterproof material.
The self-adhesive waterproof coiled material is a waterproof material which is prepared by taking self-adhesive rubber asphalt prepared from synthetic rubber such as SBS and the like, a tackifier, high-quality road petroleum asphalt and the like as a base material, taking a tough high-density polyethylene film or aluminum foil as an upper surface material and taking a strippable silicon-coated isolating film as a lower surface anti-adhesive isolating material. The waterproof material is a novel waterproof material with great development prospect, has the characteristics of low-temperature flexibility, good self-healing property, good bonding property and the like, can be constructed at normal temperature, has high construction speed and meets the requirement of environmental protection.
The isolating film is formed by coating a release agent such as silicon oil on the surface of the film to reduce the adhesive force of the surface of the film, so that the film does not have viscosity or has slight viscosity after being contacted with a specific material under a certain condition, thereby achieving the effect of releasing. At present, two main types of isolating membranes used by the self-adhesive waterproof coiled material are PE and PET, and the thickness of the isolating membrane is generally 0.025-0.05 mm. The PE film has good toughness and tear resistance, but has poor barrier property, is easy to be adhered with asphalt glue after being exposed to the sun and is not easy to peel; the PET film has high mechanical strength and good barrier property, but has high rigidity and poor toughness, and is not easy to roll when producing waterproof coiled materials; in addition, special treatments such as corona treatment are required for printing of both PE and PET.
Disclosure of Invention
The invention aims to provide a self-adhesive isolating membrane for a waterproof coiled material and a preparation method thereof, which are used for preparing the self-adhesive waterproof coiled material so as to meet the development requirement of the building waterproof industry.
Aiming at the problems in the prior art, the invention develops the polyester modified isolating membrane which has good toughness and is easy to peel, can be printed or sprayed without any treatment, and can meet the requirements of a novel waterproof market.
The purpose of the invention is realized by the following technical scheme:
a self-adhesive water-proof coiled material isolating film is composed of an upper surface layer, a core layer and a lower surface layer; the core layer is composed of PET (polyethylene terephthalate), SEBS (hydrogenated styrene-butadiene block copolymer) thermoplastic elastomer and PE-g-MAH (maleic anhydride grafted polyethylene, namely polyethylene grafted with maleic anhydride compatilizer), and the lower surface layer is composed of PETG.
Further, in the upper surface layer, the content of PETG is 80-85% and the content of PETG master batch is 15-20% in percentage by weight.
Furthermore, in the core layer, according to the weight percentage, the content of PET is 75% -85%, the content of PE-g-MAH is 10-15%, and the content of SEBS is 5-10%.
Further, the content of PETG in the lower skin layer was 100%.
Further, the PETG masterbatch preferably contains Silica (SiO)2) The anti-blocking masterbatch of (1). In the upper surface layer, silicon dioxide (SiO)2) The addition weight of (A) is 0.1-1%.
Furthermore, the total thickness of the isolating film is 25-50 μm, the thickness of the upper surface layer accounts for 10-20% of the total thickness of the film, the thickness of the core layer accounts for 60-80% of the total thickness of the film, and the thickness of the lower surface layer accounts for 10-20% of the total thickness of the film.
In the method, the PETG master batch and the PET raw materials are respectively PETG slices, PETG master batch slices and PET slices.
The performance test indexes of the isolating membrane for the waterproof coiled material are shown in the table 1.
TABLE 1 Performance index of the inventive separator
Test items Test value Test standard
Thickness (μm) 25～50 GB/T 6672-2001
Transverse tensile Strength (MPa) ≧200 GB/T 1040.3-2006
Longitudinal tensile Strength (MPa) ≧200 GB/T 1040.3-2006
Transverse elongation (%) ≧180 GB/T 1040.3-2006
Longitudinal elongation (%) ≧180 GB/T 1040.3-2006
Transverse shrinkage (%) ≦3 GB/T 16958-2008
Longitudinal shrinkage (%) ≦3 GB/T 16958-2008
Surface wetting tension (dyn) ≧38 GB/T 14216-2008
The invention also provides a method for preparing the isolating membrane for the waterproof roll, which comprises the steps of uniformly mixing the raw materials according to the formula, and carrying out melt plasticizing, sheet casting, biaxial stretching, traction rolling and slitting on the raw materials by an extruder to obtain the isolating membrane for the self-adhesive waterproof roll.
A preparation method of a self-adhesive water-proof coiled material isolating membrane comprises the following steps:
(1) uniformly mixing the components according to the composition formula of the core layer in proportion, melting and vacuumizing the mixture in a main extruder, and filtering to remove water and impurities in the raw materials to obtain a main extrusion melt serving as the core layer;
(2) uniformly mixing the components according to the composition formula of the upper surface layer and the lower surface layer in proportion, and carrying out melting and vacuumizing treatment by respective corresponding auxiliary extruders to obtain auxiliary extrusion melt serving as the upper surface layer and the lower surface layer;
(3) converging and extruding the main extrusion melt and the auxiliary extrusion melts on the upper and lower surface layers in a three-layer die head, and closely attaching the extruded mixed melt to the surface of a grounded cold drum after passing through an electrostatic adsorption wire to form a cast sheet;
(4) stripping the cast sheet from the cold drum to form a sheet, preheating the sheet, then entering a longitudinal stretching area, and completing longitudinal stretching through double-point stretching; the longitudinally stretched sheet directly enters a transverse stretching area after being preheated, transverse stretching is completed through multi-stage stretching, then the longitudinally and transversely stretched film is subjected to heat setting treatment, and finally cooling is performed;
(5) and (2) cooling the film, then feeding the cooled film into a traction device, flattening the stretched film, detecting the longitudinal and transverse thicknesses of the film by using a film thickness meter, then cutting off two waste edges, conveying the film to a winding machine at a constant speed for winding, and finally slitting to obtain the self-adhesive isolating membrane for the waterproof roll.
In the steps (1) and (2), the extrusion temperature of the main extrusion melt and the auxiliary extrusion melt is 255-275 ℃, and after the main extrusion melt and the auxiliary extrusion melt are subjected to vacuum-pumping treatment and filter, the water content is less than or equal to 50 ppm.
In the step (3), the melts of the upper surface layer, the core layer and the lower surface layer respectively correspond to three sets of extrusion systems, three melts are converged to a die head to realize three-layer co-extrusion, and the die head is an ABC three-flow-channel T-shaped die head. The die head temperature is 270-275 ℃, and the cold drum temperature is 25-35 ℃.
In the step (4), the preheating temperature of longitudinal stretching is 70-80 ℃, the temperature of a slow stretching roller is 80-85 ℃, the temperature of a fast stretching roller is 35-40 ℃, and the stretching multiple is 1.5-3.5 times. The preheating temperature of transverse stretching is 85-105 ℃, the stretching temperature is 105-110 ℃, and the stretching multiple is 1.5-3.5 times. The temperature of the heat setting treatment is 180-220 ℃.
In the step (5), the thickness of the isolating membrane for the waterproof coiled material is 25-50 μm.
In the method, the PET used in the film core layer can be added with a certain proportion of reclaimed materials, and the reclaimed materials are waste sheets, waste films and trimming materials generated in the process of preparing the biaxially oriented PET film, so that the production cost can be greatly reduced.
The PET chip, PETG chip and master batch chip used in the above methods are commercially available products or products produced by the company (publicly available products), and the PE-g-MAH and SEBS thermoplastic elastomers are commercially available products.
Compared with the prior art, the invention has the beneficial effects that: (1) the isolating membrane has high strength and good barrier property, is easy to strip, improves the toughness and the tear resistance by adding the SEBS elastomer and the PE into the thin film, and meets the use requirement of the isolating membrane for the waterproof coiled material; (2) the compatilizer is introduced by adding the PE-g-MAH, so that the dispersion of the compatilizer is facilitated, and the compatibility between PE and PET is increased; (3) the upper and lower surface layers of the film are both made of PETG, so that the film has excellent printing performance and coating performance, and the surface can be subjected to various printing or spraying without any special treatment.
Detailed Description
The isolating membrane for the self-adhesive waterproof coiled material consists of an upper surface layer, a core layer and a lower surface layer, wherein the upper surface layer consists of PETG slices and SiO-containing SiO2The core layer is made of PET slices, SEBS thermoplastic elastomer and PE-g-MAH (polyethylene grafted with maleic anhydride compatilizer), and the lower surface layer is made of PETG slices. The preparation method comprises the steps of mixing the raw materials according to the formula of each layer, respectively melting by three sets of extrusion systems, vacuumizing, filtering and extruding, converging the three melts to a T-shaped die head, extruding a cast sheet, wherein the die head is an ABC three-flow-channel T-shaped die head, and carrying out bidirectional stretching, shaping, traction, rolling and slitting on the cast sheet to obtain the self-adhesive isolating membrane for the waterproof coiled material.
Example 1
1. Raw material preparation (weight ratio, the same below)
And (3) upper surface layer: 80 parts of PETG polyester chip and 20 parts of anti-bonding PETG master batch
Core layer: 75 parts of PET, 15 parts of PE-g-MAH and 10 parts of SEBS elastomer
Lower surface layer: 100 parts of PETG
2. Production process
(1) The components are uniformly mixed according to the composition formula of the core layer, after melting and vacuumizing treatment in a main extruder, water and impurities in the raw materials are removed through filtration to obtain a main extrusion melt serving as the core layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(2) The components are respectively and uniformly mixed according to the composition formula of the upper surface layer and the lower surface layer in proportion, and are melted and vacuumized by respective corresponding auxiliary extruders to obtain auxiliary extrusion melt serving as the upper surface layer and the lower surface layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(3) Converging and extruding the main extrusion melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, wherein the extrusion temperature is 255 ℃ and the die head temperature is 270 ℃; after passing through the electrostatic adsorption wire, the extruded mixed melt is tightly attached to the surface of a grounded cold drum to form a cast sheet, wherein the temperature of the cold drum is 25 ℃.
(4) And stripping the cast sheet from the cold drum to form a sheet, preheating the sheet, and then entering a longitudinal stretching area, wherein the preheating temperature is 80 ℃, the temperature of a slow stretching roller is 85 ℃, the temperature of a fast stretching roller is 35 ℃, and 2.5 times of stretching is completed through double-point stretching.
(5) Preheating the longitudinally stretched sheet material to directly enter a transverse stretching area, wherein the preheating temperature is 95 ℃, and the stretching temperature is 105 ℃; after the 2.5 times stretching is finished through multi-stage stretching, the film after longitudinal and transverse stretching is subjected to heat setting at the temperature of 220 ℃, and finally, the film is cooled.
(6) And (2) cooling the film, then feeding the film into a traction device, flattening the stretched film, detecting the longitudinal and transverse thicknesses of the film by using a film thickness meter, then cutting off two waste edges, sending the film to a winding machine at a constant speed for winding, and finally slitting to obtain the isolating film for the waterproof coiled material. In the isolating film, the thickness of the upper surface layer accounts for about 10% of the total thickness of the film, the thickness of the core layer accounts for about 80% of the total thickness of the film, and the thickness of the lower surface layer accounts for about 10% of the total thickness of the film.
Example 2
1. Preparation of raw materials
And (3) upper surface layer: 80 parts of PETG polyester chip and 20 parts of anti-bonding PETG master batch
Core layer: 80 parts of PET, 10 parts of PE-g-MAH and 10 parts of SEBS elastomer
Lower surface layer: 100 parts of PETG
2. Production process
(1) The components are uniformly mixed according to the composition formula of the core layer, after melting and vacuumizing treatment in a main extruder, water and impurities in the raw materials are removed through filtration to obtain a main extrusion melt serving as the core layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(2) The components are respectively and uniformly mixed according to the composition formula of the upper surface layer and the lower surface layer in proportion, and are melted and vacuumized by respective corresponding auxiliary extruders to obtain auxiliary extrusion melt serving as the upper surface layer and the lower surface layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(3) Converging and extruding the main extrusion melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, wherein the extrusion temperature is 260 ℃ and the die head temperature is 270 ℃; after passing through the electrostatic adsorption wire, the extruded mixed melt is tightly attached to the surface of a grounded cold drum to form a cast sheet, wherein the temperature of the cold drum is 25 ℃.
(4) Stripping the cast sheet from the cold drum to form a sheet, preheating the sheet, and then entering a longitudinal stretching area, wherein the preheating temperature is 70 ℃, the temperature of a slow stretching roller is 80 ℃, and the temperature of a fast stretching roller is 40 ℃; the 3-fold stretching was accomplished by double-point stretching.
(5) Preheating the longitudinally stretched sheet material to directly enter a transverse stretching area, wherein the preheating temperature is 105 ℃, and the stretching temperature is 110 ℃; after the 2.5 times stretching is finished through multi-stage stretching, the film after longitudinal and transverse stretching is subjected to heat setting at the temperature of 210 ℃, and finally, the film is cooled.
(6) And (2) cooling the film, then feeding the film into a traction device, flattening the stretched film, detecting the longitudinal and transverse thicknesses of the film by using a film thickness meter, then cutting off two waste edges, sending the film to a winding machine at a constant speed for winding, and finally slitting to obtain the isolating film for the waterproof coiled material. In the isolating film, the thickness of the upper surface layer accounts for about 15% of the total thickness of the film, the thickness of the core layer accounts for about 70% of the total thickness of the film, and the thickness of the lower surface layer accounts for about 15% of the total thickness of the film.
Example 3
1. Preparation of raw materials
And (3) upper surface layer: 85 parts of PETG polyester chip and 15 parts of anti-bonding PETG master batch
Core layer: 80 parts of PET, 15 parts of PE-g-MAH and 5 parts of SEBS elastomer
Lower surface layer: 100 parts of PETG
2. Production process
(1) The components are uniformly mixed according to the composition formula of the core layer, after melting and vacuumizing treatment in a main extruder, water and impurities in the raw materials are removed through filtration to obtain a main extrusion melt serving as the core layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(2) The components are respectively and uniformly mixed according to the composition formula of the upper surface layer and the lower surface layer in proportion, and are melted and vacuumized by respective corresponding auxiliary extruders to obtain auxiliary extrusion melt serving as the upper surface layer and the lower surface layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(3) Converging and extruding the main extrusion melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, wherein the extrusion temperature is 275 ℃, and the die head temperature is 272 ℃; after passing through the electrostatic adsorption wire, the extruded mixed melt is tightly attached to the surface of a grounded cold drum to form a cast sheet, wherein the temperature of the cold drum is 30 ℃.
(4) Stripping the cast sheet from the cold drum to form a sheet, preheating the sheet, and then entering a longitudinal stretching area, wherein the preheating temperature is 78 ℃, the temperature of a slow stretching roller is 83 ℃, and the temperature of a fast stretching roller is 38 ℃; the 3-fold stretching was accomplished by double-point stretching.
(5) The longitudinally stretched sheet directly enters a transverse stretching area after being preheated, wherein the preheating temperature is 85 ℃, and the stretching temperature is 106 ℃; after multi-stage stretching, 3 times of stretching is finished, then the film after longitudinal and transverse stretching is subjected to heat setting at the temperature of 180 ℃, and finally, the film is cooled.
(6) And (2) cooling the film, then feeding the film into a traction device, flattening the stretched film, detecting the longitudinal and transverse thicknesses of the film by using a film thickness meter, then cutting off two waste edges, sending the film to a winding machine at a constant speed for winding, and finally slitting to obtain the isolating film for the waterproof coiled material. In the isolating film, the thickness of the upper surface layer accounts for about 20% of the total thickness of the film, the thickness of the core layer accounts for about 60% of the total thickness of the film, and the thickness of the lower surface layer accounts for about 20% of the total thickness of the film.
Example 4
1. Preparation of raw materials
And (3) upper surface layer: 85 parts of PETG polyester chip and 15 parts of anti-bonding PETG master batch
Core layer: 85 parts of PET, 10 parts of PE-g-MAH and 5 parts of SEBS elastomer
Lower surface layer: 100 parts of PETG
2. Production process
(1) The components are uniformly mixed according to the composition formula of the core layer, after melting and vacuumizing treatment in a main extruder, water and impurities in the raw materials are removed through filtration to obtain a main extrusion melt serving as the core layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(2) The components are respectively and uniformly mixed according to the composition formula of the upper surface layer and the lower surface layer in proportion, and are melted and vacuumized by respective corresponding auxiliary extruders to obtain auxiliary extrusion melt serving as the upper surface layer and the lower surface layer, and the water content in the melt is controlled to be less than or equal to 50 ppm.
(3) Converging and extruding the main extrusion melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, wherein the extrusion temperature is 270 ℃, and the die head temperature is 275 ℃; after passing through the electrostatic adsorption wire, the extruded mixed melt is tightly attached to the surface of a grounded cold drum to form a cast sheet, wherein the temperature of the cold drum is 35 ℃.
(4) Stripping the cast sheet from the cold drum to form a sheet, preheating the sheet, and then entering a longitudinal stretching area, wherein the preheating temperature is 75 ℃, the temperature of a slow stretching roller is 81 ℃, and the temperature of a fast stretching roller is 37 ℃; the 3.5-fold stretching was accomplished by double-point stretching.
(5) Preheating the longitudinally stretched sheet material to directly enter a transverse stretching area, wherein the preheating temperature is 100 ℃, and the stretching temperature is 108 ℃; after multi-stage stretching, 3 times of stretching is finished, then the film after longitudinal and transverse stretching is subjected to heat setting at the temperature of 190 ℃, and finally, the film is cooled.
(6) And (2) cooling the film, then feeding the film into a traction device, flattening the stretched film, detecting the longitudinal and transverse thicknesses of the film by using a film thickness meter, then cutting off two waste edges, sending the film to a winding machine at a constant speed for winding, and finally slitting to obtain the isolating film for the waterproof coiled material. In the isolating film, the thickness of the upper surface layer accounts for about 15% of the total thickness of the film, the thickness of the core layer accounts for about 75% of the total thickness of the film, and the thickness of the lower surface layer accounts for about 10% of the total thickness of the film.
The results of the performance test of the release film for self-adhesive waterproof sheet prepared in examples 1 to 4 are shown in Table 2.
Table 2 results of performance test of release film for self-adhesive waterproof sheet prepared in examples 1 to 4
Test items Example 1 Example 2 Example 3 Example 4
Thickness (μm) 30 40 45 50
Transverse tensile Strength (MPa) 221 227 245 252
Longitudinal tensile Strength (MPa) 218 235 243 268
Transverse elongation (%) 223 212 194 188
Longitudinal elongation (%) 225 201 197 182
Transverse shrinkage (%) 1.7 2.0 2.6 2.8
Longitudinal shrinkage (%) 1.8 2.2 2.6 3
Surface wetting tension (dyn) 39 39 40 40
The self-adhesive isolating membrane for the waterproof coiled material, which is prepared by the invention, has the advantages of high strength, good toughness, good barrier property and easy stripping, the upper surface layer and the lower surface layer of the membrane are both made of PETG, the membrane has excellent printing performance and coating performance, the surface can be printed or sprayed without any special treatment, and the use requirement of the isolating membrane for the waterproof coiled material is completely met.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. The utility model provides a self-adhesion barrier film for waterproofing membrane which characterized in that: the film consists of an upper surface layer, a core layer and a lower surface layer; the upper surface layer is composed of PETG and SiO-containing2The core layer is composed of PET, SEBS thermoplastic elastomer and PE-g-MAH, and the lower surface layer is composed of PETG.
2. The release film for a self-adhesive waterproof roll according to claim 1, characterized in that: according to the weight percentage, the content of PETG in the upper surface layer is 80-85%, and the content of PETG master batch is 15-20%; in the core layer, the content of PET is 75% -85%, the content of PE-g-MAH is 10-15%, and the content of SEBS is 5-10%.
3. The release film for a self-adhesive waterproof roll according to claim 1, characterized in that: in the isolating film, the thickness of the upper surface layer accounts for 10-20% of the total thickness of the film, the thickness of the core layer accounts for 60-80% of the total thickness of the film, and the thickness of the lower surface layer accounts for 10-20% of the total thickness of the film.
4. The release film for a self-adhesive waterproof roll according to claim 3, characterized in that: the total thickness of the isolation film is 25-50 mu m.
5. The process for producing a release film for a self-adhesive water-repellent roll according to any one of claims 1 to 4, comprising the steps of:
(1) uniformly mixing the components according to the composition formula of the core layer in proportion, melting and vacuumizing the mixture in a main extruder, and filtering to remove water and impurities in the raw materials to obtain a main extrusion melt serving as the core layer;
(2) uniformly mixing the components according to the composition formula of the upper surface layer and the lower surface layer in proportion, and carrying out melting and vacuumizing treatment by respective corresponding auxiliary extruders to obtain auxiliary extrusion melt serving as the upper surface layer and the lower surface layer;
(3) converging and extruding the main extrusion melt and the auxiliary extrusion melts on the upper and lower surface layers in a three-layer die head, and closely attaching the extruded mixed melt to the surface of a grounded cold drum after passing through an electrostatic adsorption wire to form a cast sheet;
(4) stripping the cast sheet from the cold drum to form a sheet, preheating the sheet, then entering a longitudinal stretching area, and completing longitudinal stretching through double-point stretching; the longitudinally stretched sheet directly enters a transverse stretching area after being preheated, transverse stretching is completed through multi-stage stretching, then the longitudinally and transversely stretched film is subjected to heat setting treatment, and finally cooling is performed;
(5) and (3) cooling the film, then feeding the cooled film into a traction device, flattening the stretched film, detecting the longitudinal and transverse thicknesses of the film by using a film thickness meter, then cutting off two waste edges, feeding the film to a winding machine for winding, and finally slitting to obtain the isolating film for the waterproof coiled material.
6. The method for preparing the release film for the self-adhesive waterproof roll according to claim 5, characterized in that: the extrusion temperature of the main extrusion melt and the auxiliary extrusion melt is 255-275 ℃, and the water content of the main extrusion melt and the auxiliary extrusion melt is less than or equal to 50ppm after the main extrusion melt and the auxiliary extrusion melt are subjected to vacuum-pumping treatment and filter filtration.
7. The method for preparing the release film for the self-adhesive waterproof roll according to claim 5, characterized in that: the melts of the upper surface layer, the core layer and the lower surface layer respectively correspond to three sets of extrusion systems, the three melts are converged to a die head to realize three-layer co-extrusion, and the die head is an ABC three-flow-channel T-shaped die head.
8. The method for preparing the release film for the self-adhesive waterproof roll according to claim 7, characterized in that: the temperature of the die head is 270-275 ℃, and the temperature of the cold drum is 25-35 ℃.
9. The method for preparing the release film for the self-adhesive waterproof roll according to claim 5, characterized in that: the preheating temperature of longitudinal stretching is 70-80 ℃, the temperature of a slow stretching roller is 80-85 ℃, the temperature of a fast stretching roller is 35-40 ℃, and the stretching multiple is 1.5-3.5 times; the preheating temperature of the transverse stretching is 85-105 ℃, the stretching temperature is 105-110 ℃, and the stretching multiple is 1.5-3.5 times; the temperature of the heat setting treatment is 180-220 ℃.
CN201910174734.4A 2019-03-08 2019-03-08 Isolating membrane for self-adhesive waterproof roll and preparation method thereof Pending CN110696458A (en)

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CN117162624A (en) * 2023-11-02 2023-12-05 河南达新源新材料有限公司 Strong-oxygen curing type high-peeling-force PETG/PE/PET multilayer film and preparation method thereof

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