CN108909119A - A kind of PVC pre-coating film and its preparation method and application suitable for vacuum forming technique - Google Patents

A kind of PVC pre-coating film and its preparation method and application suitable for vacuum forming technique Download PDF

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Publication number
CN108909119A
CN108909119A CN201810317722.8A CN201810317722A CN108909119A CN 108909119 A CN108909119 A CN 108909119A CN 201810317722 A CN201810317722 A CN 201810317722A CN 108909119 A CN108909119 A CN 108909119A
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pvc
coating film
vacuum forming
film
component
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CN201810317722.8A
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CN108909119B (en
Inventor
周建明
陆佩仪
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Xiangyang Jingxin Huiming Science And Technology Co Ltd
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Xiangyang Jingxin Huiming Science And Technology Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00Producing flat articles, e.g. films or sheets
    • B29D7/01Films or sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/08Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/10Layered 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 paper or cardboard
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00Layered products comprising a layer of paper or cardboard
    • B32B29/002Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00Ancillary operations in connection with laminating processes
    • B32B38/10Removing layers, or parts of layers, mechanically or chemically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/06Interconnection of layers permitting easy separation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties

Abstract

The PVC pre-coating film and its preparation method and application that the invention discloses a kind of suitable for vacuum forming technique.This PVC pre-coating film suitable for vacuum forming technique, dual-component polyurethane hot melt adhesive layer and release film layer including layers of polyvinyl chloride films, adjustable fusing point according to arrangement.The preparation method of this PVC pre-coating film suitable for vacuum forming technique is also disclosed, the application of the PVC pre-coating film for being suitable for vacuum forming technique is also disclosed.Use PVC pre-coating film of the invention, eliminate the prior art when carrying out vacuum forming combination process to single composite base material implement one by one gluing, the cumbersome process such as dry, pollution of the solvent to operating environment in glue is avoided, labor intensity of workers is reduced, improves production efficiency.

Description

A kind of PVC pre-coating film and its preparation method and application suitable for vacuum forming technique
Technical field
The PVC pre-coating film and its preparation method and application that the present invention relates to a kind of suitable for vacuum forming technique.
Background technique
Plastics sucking plate as a kind of new green environment protection material by its light, lustrous surface, rich in color, it is fire-retardant, heat-resisting, Moisture-proof, waterproof, heat preservation, sound insulation, damping, it is antistatic the features such as have been widely used for ad decoration, interior decoration, in automobile Decorations, refrigerator liners, household appliances shell, movable plate door, Porta Potti door etc..The substrate of plastics sucking plate is density board, fire prevention Plate, particieboard, glued board, fiberboard, plank etc., surface is formed through vacuum forming PVC film.Plastics sucking plate system currently on the market Making technique is usually one layer of solvent-based adhesive or aqueous adhesive on substrate surface hand spray, equal solvent volatilization or moisture Again by PVC film vacuum forming to plate after drying, this technique need to be to one block of one block of gluing of substrate, when there is hanging after gluing Between it is long, glue pollutes plastic uptake equipment, the cleaning of equipment difficulty, and solvent type glue pollutes the environment, bonding force of the water-base cement to PVC film The disadvantages of poor, easy to fall off.
Hot melt adhesive is the environmental-protection type adhesive widelyd popularize in recent years, widely used, deep to be welcome by various industries, if energy It is to improve plastics sucking plate quality, raising production effect with a kind of PVC pre-coating film suitable for vacuum forming technique of hot melt adhesive Informal development Rate, reduce environmental pollution beneficial to by way of plastics sucking plate will have better market prospects.But current market sales of heat The fusing point of melten gel is relatively high, and the softening point for the PVC film that vacuum forming technique uses is relatively low, this hot melt adhesive is uncomfortable Close the PVC pre-coating film of production vacuum forming.
Summary of the invention
The purpose of the present invention is to provide a kind of PVC pre-coating film suitable for vacuum forming technique and preparation method thereof and answer With, traditional vacuum plastic uptake technique can be replaced in the artificial coating process of plastic uptake substrate surface, solve artificial gluing generate it is various Disadvantage improves production efficiency and product quality.
The technical solution adopted by the present invention is that:
A kind of PVC pre-coating film suitable for vacuum forming technique, including the layers of polyvinyl chloride films according to arrangement, adjustable fusing point Dual-component polyurethane hot melt adhesive layer and release film layer.
In PVC pre-coating film, the adjustable melting range of dual-component polyurethane hot melt adhesive is 50 DEG C~110 DEG C.
In PVC pre-coating film, the dual-component polyurethane hot melt adhesive of fusing point is adjusted by the component A of hydroxyl and containing isocyanic acid The component B of root forms;The component A of hydroxyl is made of terminal hydroxy group linear polyester prepolymer and polynary resin compound;Contain The component B of isocyano is linear pre-polymer of the two ends with isocyano.
In PVC pre-coating film, release film is not carry out in the polyethylene film, polypropylene film, release paper of sided corona treatment It is one of.
The preparation method of this PVC pre-coating film suitable for vacuum forming technique:Include the following steps:
A) the dual-component polyurethane hot melt adhesive of adjustable fusing point is prepared:The component A of polyurethane hot melt and component B are mixed Stirring is closed, the dual-component polyurethane hot melt adhesive of adjustable fusing point is obtained;
B) PVC pre-coating film is prepared:The dual-component polyurethane hot melt adhesive of adjustable fusing point is applied on release film, is dried molten Agent, PVC film is compound with release film, it winds, solidification obtains the PVC pre-coating film suitable for vacuum forming technique.
PVC is precoated in the step a) of membrane preparation method, and the component A of polyurethane hot melt and the mass ratio of component B are (40 ~80):(20~60).
PVC is precoated in the step b) of membrane preparation method, and coating thickness control is 0.01mm~0.08mm.
PVC is precoated in the step b) of membrane preparation method, is cured as ambient temperature curing 60h~80h, or at 50 DEG C~60 DEG C Lower curing is for 24 hours.
It is this to prepare answering vacuum forming plate or vacuum forming film suitable for the PVC pre-coating film of vacuum forming technique With.
This application is specifically:PVC pre-coating film is first cut into the diaphragm of size identical as substrate to be composite, is taken off release Film, then PVC pre-coating film is laid on substrate to be composite, carries out that vacuum forming is compound and hot pressing, obtains vacuum forming plate.
The beneficial effects of the invention are as follows:
Using PVC pre-coating film of the invention, the prior art is eliminated when carrying out vacuum forming combination process to single multiple Close substrate implement one by one gluing, the cumbersome process such as dry, avoid pollution of the solvent to operating environment in glue, reduce worker Labor intensity improves production efficiency.
Compared with prior art, the present invention has the following advantages that:
1) plastic uptake simple process, environment friendly and pollution-free.It only needs to adjust compound temperature using the vacuum forming technique of PVC pre-coating film It is compound that degree to hot melt adhesive fusing point can carry out plastic uptake, the processes such as does not need brush coating, dries, and PVC is precoated during plastic uptake Film will not generate any toxic, harmful and volatile materials.
2) high production efficiency.PVC pre-coating film is processed in rolls with coating machine, than PVC film to the monolithic gluing of substrate, dry Process doubles up production efficiency.
3) the plastics sucking plate presentation quality of PVC pre-coating film manufacture is good.PVC pre-coating film is coating machine gluing, and gluing is uniform, thickness Unanimously, phenomena such as being not in hand spray, the glue-line gage distortion of brush coating, current mark, the appearance of plastics sucking plate is significantly improved Quality.
4) PVC film and substrate bonding are secured.Dual-component polyurethane adhesive is to PVC film, density board, fire-proof plate, wood shavings The plates such as plate, glued board, fiberboard, plank have very strong adhesive force, can be securely joined with these substrates after hot melt adhesive melting Together, the film layer of manufactured PVC plastics sucking plate is not easily to fall off, and the aqueous adhesive that existing PVC vacuum forming technique uses Often there is bonding obscission.
5) the PVC pre-coating film of low softening point can be made.It, can be to low since the melting range of used hot melt adhesive is adjustable The PVC film of softening point is coated, applied widely.
Specific embodiment
A kind of PVC pre-coating film suitable for vacuum forming technique, including the layers of polyvinyl chloride films, adjustable molten being arranged successively The dual-component polyurethane hot melt adhesive layer and release film layer of point.
Preferably, in PVC pre-coating film, the adjustable melting range of dual-component polyurethane hot melt adhesive is 50 DEG C~110 DEG C;Into One step, the adjustable melting range of dual-component polyurethane hot melt adhesive is 60 DEG C~90 DEG C.
Preferably, in PVC pre-coating film, the dual-component polyurethane hot melt adhesive of adjustable fusing point by hydroxyl component A and contain The component B of isocyano forms;The particular technique content of the hot melt adhesive of the dual-component polyurethane hot melt adhesive layer of adjustable fusing point can See disclosed in CN107418478A " one kind can coating solvent type dual-component polyurethane hot melt adhesive ", is believed by Foshan City's essence Huiming Science And Technology Co., Ltd. is produced.
Preferably, in PVC pre-coating film, release film is the polyethylene film for not carrying out sided corona treatment, polypropylene film, release One of which in paper.
The preparation method of this PVC pre-coating film suitable for vacuum forming technique:Include the following steps:
A) the dual-component polyurethane hot melt adhesive of adjustable fusing point is prepared:The component A of polyurethane hot melt and component B are mixed Stirring is closed, the dual-component polyurethane hot melt adhesive of adjustable fusing point is obtained;
B) PVC pre-coating film is prepared:The dual-component polyurethane hot melt adhesive of adjustable fusing point is applied on release film, is dried molten Agent, PVC film is compound with release film, it winds, solidification obtains the PVC pre-coating film suitable for vacuum forming technique.
Preferably, PVC is precoated in the step a) of membrane preparation method, the component A of polyurethane hot melt and the quality of component B Than for (40~80):(20~60).
Further, PVC precoats the step b) of membrane preparation method specifically, the dual-component polyurethane heat that step a) is obtained Melten gel is added in size tub, and the rubber roller that coating machine rolls is by glue even spread to release film, by drying tunnel dry out solvent, heat PVC film is rolled compound, winding with release film by pressure roller, and solidification obtains the PVC pre-coating film suitable for vacuum forming technique.
Preferably, PVC is precoated in the step b) of membrane preparation method, and the painting of the dual-component polyurethane hot melt adhesive of fusing point is adjusted Cloth thickness control is 0.01mm~0.08mm;Further preferably 0.02mm~0.06mm.
Preferably, PVC is precoated in the step b) of membrane preparation method, is cured as ambient temperature curing 60h~80h, further excellent It is selected as ambient temperature curing 72h;Or it is cured for 24 hours at 50 DEG C~60 DEG C.
Further, the softening of fusing point PVC film according to required by plastics sucking plate set by dual-component polyurethane hot melt adhesive Depending on the use technique of point and coating machine, fusing point can be adjusted by the different ratio of two component of first, second.
It is this to prepare answering vacuum forming plate or vacuum forming film suitable for the PVC pre-coating film of vacuum forming technique With.
Further, this PVC pre-coating film is suitable for vacuum plastic-absorbing machine and is heated vacuum forming to be combined to density board, anti- Various plastics sucking plates and vacuum hotpressing plastic uptake produced with combination are made on the plates such as fiery plate, particieboard, glued board, fiberboard, plank The pad pasting of various heterotypic materials.
This application is specifically:PVC pre-coating film is first cut into the diaphragm of size identical as substrate to be composite, is taken off release Film, then PVC pre-coating film is laid on substrate to be composite, carries out that vacuum forming is compound and hot pressing, obtains vacuum forming plate.
Preferably, in, substrate to be composite is density board, in fire-proof plate, particieboard, glued board, fiberboard, plank It is one of.
Preferably, in, the compound temperature of vacuum forming is 170 DEG C~220 DEG C, and the time is 90s~180s.
The contents of the present invention further explained below:
PVC pre-coating film of the invention is the film type material for being exclusively used in production PVC plastics sucking plate.Carry out the processing of PVC plastics sucking plate When, PVC pre-coating film is first cut into the diaphragm roughly the same with substrate (plate) size, takes what PVC precoating film surface was covered with off Release film, then PVC pre-coating film is laid on plate, and put vacuum plastic-absorbing machine into, it is heated to the fusing point of hot melt adhesive, is vacuumized Plastic uptake progress hot pressing is compound, is cooled to room temperature, obtains PVC plastics sucking plate.In entire PVC plastics sucking plate manufacturing process not manually Gluing eliminates dry out solvent and moisture process, reduces environmental pollution, improves production efficiency.
The heating temperature of vacuum plastic-absorbing machine determines by the fusing point for the dual-component polyurethane hot melt adhesive being coated on PVC pre-coating film, It is fitted closely to enable PVC film to be plastically deformed well with plate, the fusing point of hot melt adhesive should be close to the softening point of PVC film. Therefore, pass through two parts of components of adjusting dual-component polyurethane hot melt adhesive after model (softening point) of PVC film has been determined Match the fusing point to determine hot melt adhesive.
PVC pre-coating film of the invention is made, can be processed at room temperature with general coating complex machine, not need dedicated heat Melten gel adds hot melt adhesive head.
It makes PVC pre-coating film of the invention to carry out at room temperature, the rubber roller of rolling uniformly applies the glue in glue groove On cloth to release film, by drying tunnel dry out solvent, PVC film is rolled compound, the glue transfer on release film by hot-pressing roller with release film Onto PVC film, release film plays the role of separating film layer when winding.PVC pre-coating film winding after store at room temperature 72 hours or It is cured 24 hours at 50 DEG C~60 DEG C, solidifies adhesive;Solvent when release film passes through drying tunnel collects, in case next time is again With.
The coiled PVC film that PVC pre-coating film of the invention is pair carries out pre- gluing solution, drying winding, subsequent handling only need by PVC pre-coating film, which is heated to the fusing point of glue or more, can be achieved with the strong bond of PVC film and substrate, eliminate to single substrate It carries out gluing, dry process, substantially increase production efficiency, improve product quality, reduce environmental pollution and production is made The actual bodily harm of industry personnel.
The contents of the present invention are described in further detail below by way of specific embodiment.Original used in embodiment Material unless otherwise specified, can be obtained from routine business approach.
Embodiment 1:
A, the dual-component polyurethane hot melt adhesive of preparation setting fusing point
In a mixer, the component A 100Kg and component B 33Kg of polyurethane hot melt is added, stirs, passes through Coating, drying measure the dual-component polyurethane hot melt adhesive that fusing point is 70 DEG C after solidifying.
B, PVC pre-coating film is prepared
The dual-component polyurethane hot melt adhesive that step a is obtained is added in size tub, and the rubber roller of rolling is by glue even spread Onto PP (polypropylene) film, control coating thickness is 0.02mm, by drying tunnel dry out solvent, controls 100 DEG C of drying tunnel temperature, hot pressing PVC film is rolled compound, winding with PP film by roller, at room temperature solidification 72 hours, obtains the PVC suitable for vacuum forming technique Pre-coating film.
C, PVC plastic uptake density board is prepared
PVC pre-coating film is first cut into and is intended to the essentially identical diaphragm of compound density board size, takes PVC pre-coating film table off The PP film that face is covered with, then PVC pre-coating film is laid in density board and is put into vacuum plastic-absorbing machine, controlled at 180 DEG C, add Heat 170 seconds vacuumizes and carries out plastic uptake and hot pressing, is cooled to room temperature, obtains density plate formats PVC plastics sucking plate.By/ T2790-1995《180 ° of peeling strength test method flexible materials of adhesive are to rigid material》, carry out 180 ° of peel strength examinations It tests, PVC film is torn.
Embodiment 2:
A, the dual-component polyurethane hot melt adhesive of preparation setting fusing point
In a mixer, the component A 100Kg and component B 45Kg of polyurethane hot melt is added, stirs, passes through Coating, drying measure the dual-component polyurethane hot melt adhesive that fusing point is 80 DEG C after solidifying.
B, PVC pre-coating film is prepared
The dual-component polyurethane hot melt adhesive that step a is obtained is added in size tub, and the rubber roller of rolling is by glue even spread Onto PP (polypropylene) film, control coating thickness is 0.025mm, by drying tunnel dry out solvent, controls 95 DEG C of drying tunnel temperature, hot pressing PVC film is rolled compound, winding with PP film by roller, after curing 24 hours in 50 DEG C of drying chamber, obtains being suitable for vacuum forming work The PVC pre-coating film of skill.
C, PVC plastic uptake fire-proof plate is prepared
PVC pre-coating film is first cut into and is intended to the essentially identical diaphragm of compound fire prevention board size, takes PVC pre-coating film table off The PP film that face is covered with, then PVC pre-coating film is laid on fire-proof plate and is put into vacuum plastic-absorbing machine, controlled at 185 DEG C, add Heat 150 seconds vacuumizes and carries out plastic uptake and hot pressing, is cooled to room temperature, obtains fire prevention template PVC plastics sucking plate.By/T2790- 1995《180 ° of peeling strength test method flexible materials of adhesive are to rigid material》, 180 ° of peeling strength tests are carried out, PVC is thin Film is torn.
Embodiment 3:
A, the dual-component polyurethane hot melt adhesive of preparation setting fusing point
In a mixer, the component A 100Kg and component B 50Kg of polyurethane hot melt is added, stirs, passes through Coating, drying measure the dual-component polyurethane hot melt adhesive that fusing point is 84.5 DEG C after solidifying.
B, PVC pre-coating film is prepared
The dual-component polyurethane hot melt adhesive that step a is obtained is added in size tub, and the rubber roller of rolling is by glue even spread Onto PE (polyethylene) film, control coating thickness is 0.05mm, by drying tunnel dry out solvent, controls 70 DEG C of drying tunnel temperature, hot pressing PVC film is rolled compound, winding with PE film by roller, after curing 72 hours at room temperature, is obtained suitable for vacuum forming technique PVC pre-coating film.
C, PVC plastic uptake particieboard is prepared
PVC pre-coating film is first cut into and is intended to the essentially identical diaphragm of compound wood shavings board size, takes PVC pre-coating film table off The PE film that face is covered with, then PVC pre-coating film is laid on particieboard and is put into vacuum plastic-absorbing machine, controlled at 190 DEG C, add Heat 120 seconds, vacuumize carry out plastic uptake heat it is compound, be cooled to room temperature, obtain wood shavings template PVC plastics sucking plate.By/T2790- 1995《180 ° of peeling strength test method flexible materials of adhesive are to rigid material》, 180 ° of peeling strength tests are carried out, PVC is thin Film is torn.
Embodiment 4:
A, the dual-component polyurethane hot melt adhesive of preparation setting fusing point
In a mixer, the component A 100Kg and component B 60Kg of polyurethane hot melt is added, stirs, passes through Coating, drying measure the dual-component polyurethane hot melt adhesive that fusing point is 90 DEG C after solidifying.
B, PVC pre-coating film is prepared
The dual-component polyurethane hot melt adhesive that step a is obtained is added in size tub, and the rubber roller of rolling is by glue even spread Onto release paper, control coating thickness is 0.06mm, by drying tunnel dry out solvent, controls 60 DEG C of drying tunnel temperature, and hot-pressing roller is by PVC Film rolls compound, winding with release paper, after curing 24 hours in 60 DEG C of drying chamber, obtains suitable for vacuum forming technique PVC pre-coating film.
C, PVC plastic uptake Wooden door plank is prepared
PVC pre-coating film is first cut into and is intended to the essentially identical diaphragm of compound timber board size, takes PVC pre-coating film table off The release paper that face is covered with, then PVC pre-coating film is laid on Wooden door plank and is put into vacuum plastic-absorbing machine, controlled at 200 DEG C, Heating 100 seconds vacuumizes and carries out plastic uptake and hot pressing, is cooled to room temperature, obtains plank type PVC plastics sucking plate.By/T2790- 1995《180 ° of peeling strength test method flexible materials of adhesive are to rigid material》, 180 ° of peeling strength tests are carried out, PVC is thin Film is torn.
Embodiment 5:
A, the dual-component polyurethane hot melt adhesive of preparation setting fusing point
In a mixer, the component A 100Kg and component B 55Kg of polyurethane hot melt is added, stirs, passes through Coating, drying measure the dual-component polyurethane hot melt adhesive that fusing point is 87 DEG C after solidifying.
B, PVC pre-coating film is prepared
The dual-component polyurethane hot melt adhesive that step a is obtained is added in size tub, and the rubber roller of rolling is by glue even spread Onto release paper, control coating thickness is 0.05mm, by drying tunnel dry out solvent, controls 60 DEG C of drying tunnel temperature, and hot-pressing roller is by PVC Film rolls compound, winding with release paper, after curing 24 hours in 60 DEG C of drying chamber, obtains suitable for vacuum forming technique PVC pre-coating film.
C, preparation PVC coats density board
PVC pre-coating film is first cut into and is intended to the essentially identical diaphragm of compound timber board size, takes PVC pre-coating film table off The release paper that face is covered with, then PVC pre-coating film is laid on density lath, control coating machine temperature is 200 DEG C, and it is multiple to carry out hot pressing It closes, is cooled to room temperature, obtains density plate formats PVC baseboard.By/T2790-1995《180 ° of peeling strength tests of adhesive Method flexible material is to rigid material》, 180 ° of peeling strength tests are carried out, PVC film is torn.

Claims (10)

1. a kind of PVC pre-coating film suitable for vacuum forming technique, it is characterised in that:Including the polychloroethylene film being arranged successively The dual-component polyurethane hot melt adhesive layer and release film layer of layer, adjustable fusing point.
2. a kind of PVC pre-coating film suitable for vacuum forming technique according to claim 1, it is characterised in that:Two-component The adjustable melting range of polyurethane hot melt is 40 DEG C~110 DEG C.
3. a kind of PVC pre-coating film suitable for vacuum forming technique according to claim 1, it is characterised in that:It is adjustable Component A of the dual-component polyurethane hot melt adhesive by hydroxyl of fusing point and the component B containing isocyano form;The first group of hydroxyl Part is made of terminal hydroxy group linear polyester prepolymer object;Component B containing isocyano is two ends with the linear pre- of isocyano Polymers.
4. a kind of PVC pre-coating film suitable for vacuum forming technique according to claim 1, it is characterised in that:Release film The one of which in polyethylene film, polypropylene film, release paper not carry out sided corona treatment.
5. a kind of described in any item preparation methods of the PVC pre-coating film suitable for vacuum forming technique of Claims 1 to 4:Packet Include following steps:
A) the dual-component polyurethane hot melt adhesive of adjustable fusing point is prepared:The component A of polyurethane hot melt and component B are mixed and stirred It mixes, obtains the dual-component polyurethane hot melt adhesive of adjustable fusing point;
B) PVC pre-coating film is prepared:The dual-component polyurethane hot melt adhesive of adjustable fusing point is applied on release film, dry out solvent, PVC film is compound with release film, it winds, solidification obtains the PVC pre-coating film suitable for vacuum forming technique.
6. a kind of preparation method of PVC pre-coating film suitable for vacuum forming technique according to claim 5, feature exist In:In step a), the component A of polyurethane hot melt and the mass ratio of component B are (40~80):(20~60).
7. a kind of preparation method of PVC pre-coating film suitable for vacuum forming technique according to claim 5, feature exist In:In step b), coating thickness control is 0.01mm~0.08mm.
8. a kind of preparation method of PVC pre-coating film suitable for vacuum forming technique according to claim 5, feature exist In:In step b), it is cured as ambient temperature curing 60h~80h, or cure for 24 hours at 50 DEG C~60 DEG C.
9. a kind of described in any item PVC pre-coating films suitable for vacuum forming technique of Claims 1 to 4 are preparing vacuum forming Application in plate.
10. application according to claim 9, it is characterised in that:First PVC pre-coating film is cut into identical as substrate to be composite The diaphragm of size takes release film off, then PVC pre-coating film is laid on substrate to be composite, carries out that vacuum forming is compound and hot pressing It closes, obtains vacuum forming plate.
CN201810317722.8A 2018-04-10 2018-04-10 PVC (polyvinyl chloride) pre-coating film suitable for vacuum plastic-absorbing process and preparation method and application thereof Active CN108909119B (en)

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CN205395507U (en) * 2016-03-04 2016-07-27 广东希贵光固化材料有限公司 Vacuum plastic molding heat -transfer die
CN106393938A (en) * 2016-09-27 2017-02-15 山东通佳机械有限公司 Crawler-type adhesive film coating compound device and process thereof
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JPH03239780A (en) * 1990-02-19 1991-10-25 Sunstar Eng Inc Adhesive for precoating
CN101020380A (en) * 2007-01-16 2007-08-22 杭州布基胶粘衬布有限公司 Wet glucing and coating process
CN101259813A (en) * 2008-04-01 2008-09-10 邝干辉 PVC plastic absorbing film and method for transferring the same to plate surface
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CN205395507U (en) * 2016-03-04 2016-07-27 广东希贵光固化材料有限公司 Vacuum plastic molding heat -transfer die
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