CN114193887A - Production method of waterproof heat-resistant BOPA film - Google Patents

Production method of waterproof heat-resistant BOPA film Download PDF

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Publication number
CN114193887A
CN114193887A CN202111471282.XA CN202111471282A CN114193887A CN 114193887 A CN114193887 A CN 114193887A CN 202111471282 A CN202111471282 A CN 202111471282A CN 114193887 A CN114193887 A CN 114193887A
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China
Prior art keywords
surface layer
component
film
mah
resistant
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CN202111471282.XA
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Chinese (zh)
Inventor
邵峥
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Ningbo Ruicheng Packing Material Co ltd
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Ningbo Ruicheng Packing Material Co ltd
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Priority to CN202111471282.XA priority Critical patent/CN114193887A/en
Publication of CN114193887A publication Critical patent/CN114193887A/en
Pending legal-status Critical Current

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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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • 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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)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
    • 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
    • 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
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • 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
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and 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
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass 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
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21—Anti-static
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • 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
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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

Abstract

The invention discloses a production method of a waterproof heat-resistant BOPA film, wherein the BOPA film consists of an upper surface layer, a core layer and a lower surface layer; the upper surface layer consists of PA6, PO-g-MAH, PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA; the core layer consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH, PE-g-MAH, PA6, PET, a polysiloxane coupling agent and glass fiber; the lower surface layer is composed of PA6, ABS, linear epoxy resin, PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber. The invention has the advantages of water resistance, heat resistance, toughening and the like.

Description

Production method of waterproof heat-resistant BOPA film
Technical Field
The invention relates to the technical field of BOPA films, in particular to a production method of a waterproof heat-resistant BOPA film.
Background
BOPA is a biaxially oriented nylon film, which is an important material for the production of various composite packaging materials. Prior art BOPA films typically have a three-layer construction, namely: upper skin, core and lower skin, whereas prior art BOPA films generally have good clarity and gloss and are easy to process, but have few other functions to be further improved.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention aims to: provides a production method of a waterproof heat-resistant BOPA film.
In order to solve the problems, the technical solution of the invention is as follows: a production method of a waterproof heat-resistant BOPA film comprises the steps that the BOPA film consists of an upper surface layer, a core layer and a lower surface layer;
the upper surface layer consists of PA6, PO-g-MAH, PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH, PE-g-MAH, PA6, PET, a polysiloxane coupling agent and glass fiber;
the lower surface layer consists of PA6, ABS, linear epoxy resin, PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber;
the production method comprises the following steps:
(1) respectively weighing raw materials according to the proportion of each component of the upper surface layer, the core layer and the lower surface layer;
(2) respectively blending the raw materials of the upper surface layer, the core layer and the lower surface layer, and feeding the mixture into respective extruders for mixing and plasticizing;
(3) respectively sending the molten melts into a die head, and forming a molten sheet through a flat die head opening after the melts are converged in the die head;
(4) attaching the sheet to a chill roll by using an air knife, quenching to form an unshaped sheet, cooling in water bath, and shaping the sheet to form a cast sheet;
(5) stretching the cast sheet to form a film;
(6) the film detects the thickness through infrared rays, feeds back the corresponding thickness deviation to the die head, and corrects the thickness deviation of the film through the micro-motion of the heating power of the bolt at the corresponding position;
(7) carrying out high-frequency high-voltage spark treatment on the corona surface;
(8) detecting the surface quality of the film by a visual inspection method;
(9) and (5) rolling the film.
Further, the components of the upper surface layer, the core layer and the lower surface layer are as follows by mass ratio: 20% of an upper surface layer, 60% of a core layer and 20% of a lower surface layer.
Further, the upper surface layer comprises the following components in percentage by mass: PA 638%, PO 10%, PO-g-MAH 2%, PA 6640%, vinyl chloride-vinylidene chloride copolymer 5%, and saponified EVA 5%.
Further, the core layer comprises the following components in percentage by mass: PA 6630%, maleic anhydride grafted low-density polyethylene 5%, EPR-g-MAH 7.5%, PE-g-MAH 7.5%, PA 622%, PET 22%, polysiloxane coupling agent 5%, and glass fiber 1%.
Further, the lower surface layer comprises the following components in percentage by mass: PA 635%, ABS 13%, linear epoxy resin 2%, PA 6633%, styrene elastomer 5%, polyethylene 5%, magnesium hydroxide 5%, and glass fiber 2%.
Further, the upper surface layer consists of a component I and a component II, wherein the component I consists of PA6, PO and PO-g-MAH, and the component II consists of PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer consists of a third component and a fourth component, wherein the third component consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH and PE-g-MAH, and the fourth component consists of PA6, PET, polysiloxane coupling agent and glass fiber.
The lower surface layer consists of a fifth component and a sixth component, wherein the fifth component consists of PA6, ABS and linear epoxy resin, and the sixth component consists of PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber.
Further, in the step (2), the raw materials of the upper surface layer, the core layer and the lower surface layer are respectively melted and mixed according to the components, then the component I and the component II in a melting state are mixed, the component III and the component IV are mixed, and the component V and the component VI are mixed.
Further, the step (8) is specifically: the eyes of the testers and the film are at an angle of 45 degrees and are observed at a distance of 250-350mm from the film, 1 detection point is taken for each length of the film under the environment of light intensity of 600-800LUX, and the observation time of each detection point is 3-5 seconds.
The invention has the beneficial effects that:
the upper surface layer is modified by blending PA6, PO and PO-g-MAH, so that the impact strength of the film can be improved, and the gas barrier property of the film is improved by blending PA66, a vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer is modified by blending PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH and PE-g-MAH, so that the impact strength and toughness of the film can be improved, and is modified by blending PA6, PET, polysiloxane coupling agent and glass fiber, so that the waterproof effect and the heat-resistant effect can be achieved;
the lower surface layer is modified by blending PA6, ABS and linear epoxy resin to play a role in toughening and improve the impact strength, and is modified by blending PA66, a styrene elastomer, polyethylene, magnesium hydroxide and glass fiber, wherein the styrene elastomer, the polyethylene and the magnesium hydroxide can play a better role in antistatic and corrosion resistance after being added into PA66, and meanwhile, the magnesium hydroxide and the glass fiber can play a role in flame retardance after being added into PA 66.
The surface quality of the film is detected by a visual inspection method, so that the detection can be performed without detection equipment, and the cost of the detection equipment is saved.
Detailed Description
For a more intuitive and complete understanding of the technical solution of the present invention, non-limiting features are described as follows:
a production method of a waterproof heat-resistant BOPA film comprises the steps that the BOPA film consists of an upper surface layer, a core layer and a lower surface layer;
the upper surface layer consists of PA6, PO-g-MAH, PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH, PE-g-MAH, PA6, PET, a polysiloxane coupling agent and glass fiber;
the lower surface layer consists of PA6, ABS, linear epoxy resin, PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber;
the production method comprises the following steps:
(1) respectively weighing raw materials according to the proportion of each component of the upper surface layer, the core layer and the lower surface layer;
(2) respectively blending the raw materials of the upper surface layer, the core layer and the lower surface layer, and feeding the mixture into respective extruders for mixing and plasticizing;
(3) respectively sending the molten melts into a die head, and forming a molten sheet through a flat die head opening after the melts are converged in the die head;
(4) attaching the sheet to a chill roll by using an air knife, quenching to form an unshaped sheet, cooling in water bath, and shaping the sheet to form a cast sheet;
(5) stretching the cast sheet to form a film;
(6) the film detects the thickness through infrared rays, feeds back the corresponding thickness deviation to the die head, and corrects the thickness deviation of the film through the micro-motion of the heating power of the bolt at the corresponding position;
(7) carrying out high-frequency high-voltage spark treatment on the corona surface;
(8) detecting the surface quality of the film by a visual inspection method;
(9) and (5) rolling the film.
The upper surface layer, the core layer and the lower surface layer comprise the following components in percentage by mass: 20% of an upper surface layer, 60% of a core layer and 20% of a lower surface layer.
The upper surface layer comprises the following components in percentage by mass: PA 638%, PO 10%, PO-g-MAH 2%, PA 6640%, vinyl chloride-vinylidene chloride copolymer 5%, and saponified EVA 5%.
The core layer comprises the following components in percentage by mass: PA 6630%, maleic anhydride grafted low-density polyethylene 5%, EPR-g-MAH 7.5%, PE-g-MAH 7.5%, PA 622%, PET 22%, polysiloxane coupling agent 5%, and glass fiber 1%.
The lower surface layer comprises the following components in percentage by mass: PA 635%, ABS 13%, linear epoxy resin 2%, PA 6633%, styrene elastomer 5%, polyethylene 5%, magnesium hydroxide 5%, and glass fiber 2%.
The upper surface layer consists of a component I and a component II, wherein the component I consists of PA6, PO and PO-g-MAH, and the component II consists of PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer consists of a third component and a fourth component, wherein the third component consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH and PE-g-MAH, and the fourth component consists of PA6, PET, polysiloxane coupling agent and glass fiber.
The lower surface layer consists of a fifth component and a sixth component, wherein the fifth component consists of PA6, ABS and linear epoxy resin, and the sixth component consists of PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber.
In the step (2), the raw materials of the upper surface layer, the core layer and the lower surface layer are respectively melted and mixed according to the components, then the component I and the component II in a melting state are mixed, the component III and the component IV are mixed, and the component V and the component VI are mixed.
The step (8) is specifically as follows: the angle that tester eyes and film are 45 degrees is observed for 300mm with the film distance, and under the environment that illumination intensity is 700LUX, 1 check point is got to the film of each meter length, and every check point observation time is 4 seconds, can save the check out test set cost by the manual work under the equipment that does not use check out test set.
The upper surface layer of the invention can improve the impact strength of the film by blending and modifying PA6, PO and PO-g-MAH, wherein the PO-g-MAH is used as a compatilizer, and the gas barrier property of the film is improved by blending and modifying PA66, a vinyl chloride-vinylidene chloride copolymer and saponified EVA, and the mass ratio of the components of the vinyl chloride and the vinylidene chloride copolymer in the vinyl chloride-vinylidene chloride copolymer is 85: 15;
the core layer is modified by blending PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH and PE-g-MAH, so that the impact strength and toughness of the film can be improved, and is modified by blending PA6, PET, polysiloxane coupling agent and glass fiber, so that the waterproof effect and the heat-resistant effect can be achieved;
the lower surface layer is modified by blending PA6, ABS and linear epoxy resin to play a role in toughening and improve the impact strength, the linear epoxy resin is used as a compatilizer, and is modified by blending PA66, a styrene elastomer, polyethylene, magnesium hydroxide and glass fiber, the styrene elastomer, the polyethylene and the magnesium hydroxide can play a better role in antistatic and corrosion resistance after being added into PA66, and meanwhile, the magnesium hydroxide and the glass fiber can play a role in flame retardance after being added into PA 66.

Claims (8)

1. A production method of a waterproof heat-resistant BOPA film is characterized by comprising the following steps: the BOPA film consists of an upper surface layer, a core layer and a lower surface layer;
the upper surface layer consists of PA6, PO-g-MAH, PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH, PE-g-MAH, PA6, PET, a polysiloxane coupling agent and glass fiber;
the lower surface layer consists of PA6, ABS, linear epoxy resin, PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber;
the production method comprises the following steps:
(1) respectively weighing raw materials according to the proportion of each component of the upper surface layer, the core layer and the lower surface layer;
(2) respectively blending the raw materials of the upper surface layer, the core layer and the lower surface layer, and feeding the mixture into respective extruders for mixing and plasticizing;
(3) respectively sending the molten melts into a die head, and forming a molten sheet through a flat die head opening after the melts are converged in the die head;
(4) attaching the sheet to a chill roll by using an air knife, quenching to form an unshaped sheet, cooling in water bath, and shaping the sheet to form a cast sheet;
(5) stretching the cast sheet to form a film;
(6) the film detects the thickness through infrared rays, feeds back the corresponding thickness deviation to the die head, and corrects the thickness deviation of the film through the micro-motion of the heating power of the bolt at the corresponding position;
(7) carrying out high-frequency high-voltage spark treatment on the corona surface;
(8) detecting the surface quality of the film by a visual inspection method;
(9) and (5) rolling the film.
2. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 1, wherein: the upper surface layer, the core layer and the lower surface layer comprise the following components in percentage by mass: 20% of an upper surface layer, 60% of a core layer and 20% of a lower surface layer.
3. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 1, wherein: the upper surface layer comprises the following components in percentage by mass: PA 638%, PO 10%, PO-g-MAH 2%, PA 6640%, vinyl chloride-vinylidene chloride copolymer 5%, and saponified EVA 5%.
4. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 1, wherein: the core layer comprises the following components in percentage by mass: PA 6630%, maleic anhydride grafted low-density polyethylene 5%, EPR-g-MAH 7.5%, PE-g-MAH 7.5%, PA 622%, PET 22%, polysiloxane coupling agent 5%, and glass fiber 1%.
5. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 1, wherein: the lower surface layer comprises the following components in percentage by mass: PA 635%, ABS 13%, linear epoxy resin 2%, PA 6633%, styrene elastomer 5%, polyethylene 5%, magnesium hydroxide 5%, and glass fiber 2%.
6. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 1, wherein: the upper surface layer consists of a component I and a component II, wherein the component I consists of PA6, PO and PO-g-MAH, and the component II consists of PA66, vinyl chloride-vinylidene chloride copolymer and saponified EVA;
the core layer consists of a third component and a fourth component, wherein the third component consists of PA66, maleic anhydride grafted low-density polyethylene, EPR-g-MAH and PE-g-MAH, and the fourth component consists of PA6, PET, polysiloxane coupling agent and glass fiber.
The lower surface layer consists of a fifth component and a sixth component, wherein the fifth component consists of PA6, ABS and linear epoxy resin, and the sixth component consists of PA66, styrene elastomer, polyethylene, magnesium hydroxide and glass fiber.
7. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 6, wherein: in the step (2), the raw materials of the upper surface layer, the core layer and the lower surface layer are respectively melted and mixed according to the components, then the component I and the component II in a melting state are mixed, the component III and the component IV are mixed, and the component V and the component VI are mixed.
8. The method for producing a waterproof and heat-resistant BOPA film as claimed in claim 1, wherein: the step (8) is specifically as follows: the eyes of the testers and the film are at an angle of 45 degrees and are observed at a distance of 250-350mm from the film, 1 detection point is taken for each length of the film under the environment of light intensity of 600-800LUX, and the observation time of each detection point is 3-5 seconds.
CN202111471282.XA 2021-12-04 2021-12-04 Production method of waterproof heat-resistant BOPA film Pending CN114193887A (en)

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