CN106042529A - Method of processing polyurethane composite plate - Google Patents
Method of processing polyurethane composite plate Download PDFInfo
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- CN106042529A CN106042529A CN201610412913.3A CN201610412913A CN106042529A CN 106042529 A CN106042529 A CN 106042529A CN 201610412913 A CN201610412913 A CN 201610412913A CN 106042529 A CN106042529 A CN 106042529A
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- melt adhesive
- hot
- cooling
- composite plate
- polyurethane composite
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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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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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
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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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
- 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
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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
- B32B2605/00—Vehicles
- B32B2605/08—Cars
Abstract
The invention discloses a method of processing a polyurethane composite plate and belongs to the field of processing of composites. The composite of sandwich structure is composed of first nonwoven, short glass fiber, hot-melt adhesive powder, hot-melt adhesive film, a PU (polyurethane) plate, short glass fiber and hot-melt adhesive powder; the hot-melt adhesive film and hot-melt adhesive powder are arranged in order above the composite of sandwich structure with the first nonwoven facing up, and the hot-melt adhesive powder, short glass fiber and second nonwoven are arranged in order below the composite of sandwich structure with the first nonwoven facing up; a production method of the polyurethane composite plate includes: roll-pressing and combining layers to form the polyurethane composite plate; by using the technical scheme, it is possible to significantly improve adhesive quality of the layers of material in the polyurethane composite plate, prevent delamination from easily occurring during car roof forming so that the polyurethane composite plate has smooth surface and good appearance quality, and meanwhile, odor grade of the polyurethane composite plate is also reduced and odor property of the polyurethane composite plate is effectively improved.
Description
Technical field
The present invention relates to composites processing technology field, refer more particularly to the processing side of a kind of polyurethane composite plate
Method.
Background technology
Polyurethane composite plate is the roof interior decorative composite board of auto industry, is that the main flow in current domestic roof market is produced
Product.Orthodox car inner decorative ceiling, its framework material mainly uses cardboard and EPS foamed board, and its manufacturing process is complicated, the product of production
Product are yielding, the most gradually replaced by polyurethane composite plate.Compared with traditional material, polyurethane composite plate roof has suction
The features such as sound, heat insulation, lightweight, easy installation, not only become the standard configuration of top of car, are also applied to pick up, micro-, heavy truck
In field.
Along with the development of auto industry, the requirement of automobile each side is also being gradually stepped up by user.New car inner decoration material
In containing some toxic gas, can make people that headache, the symptom such as weak occur, long-term suction is harmful to health, therefore air in car
Quality has become the important indicator purchasing car, how to reduce material for car interior trim parts oder levels, improves the quality of air in car and is
Needing badly at present and solve the technical problem that, the production method of conventional compound polyurethane material mainly has following several:
Through retrieval, China Patent No.: 200710016820X, the applying date: on 07 06th, 2007, invention and created name: passenger car
Inner decorative ceiling and production technology thereof, non-woven fabrics is unreeled recombination line by the multilayer composite board of polyurethane that this process produces
On conveyer belt, sow successively or lay short glass fiber, hot melt adhesive stick, PU plate, short glass fiber, hot melt adhesive stick,
Be heated to 150-260 DEG C through recombination line, the most heated, cooling after make composite board.Although this production technology
To go out Rigid foam polyurethane by One-step production, but the shortcoming of the method is hot-melt adhesive powder sow uneven, nonwoven cloth cover
Solids hot melt adhesive is poor with PU plate bonding force, is easily generated the quality problems such as delamination, surface irregularity during molding roof.
Through retrieval, China Patent No.: 2011103980826, the applying date: on December 05th, 2011, invention and created name:
Planting roof of the vehicle sandwich base material and production method thereof, subject application is by non-woven fabrics I layer, the first short glass fiber
Layer, the first PUR bisque, the first hot melt adhesive film layer, PU flaggy, the second short glass fiber layer, the second PUR bisque group
Become just type sandwich base material；First type sandwich base material sets the second hot melt adhesive film layer and the 3rd PUR bisque, successively just
The 4th PUR bisque, the 3rd short glass fiber and non-woven fabrics II layer is set successively under type sandwich base material；Its production method
It is that each layer is combined into roof of the vehicle sandwich base material through roll-in；This sandwich base material has good anti-flammability, bending strength
And bending modulus, there is good dimensional stability and weatherability.But this application case is disadvantageous in that: this production technology is raw
There are the quality problems such as bad adhesion, surface irregularity in the roof of the vehicle sandwich base material of output, easily causes roof of the vehicle
Off quality, this production technology can not be effectively improved the odor profiles of sandwich base material simultaneously.
Summary of the invention
1. invention to solve the technical problem that
In order to solve in prior art the bad adhesion between polyurethane composite plate layers of material, the deficiency such as surface irregularity,
The processing method that the invention provides a kind of polyurethane composite plate, the invention is characterized in that water-cooled and the air-cooled cooling combined
Mode, be remarkably improved in polyurethane composite plate bond quality between layers of material, it is to avoid be easily generated de-during molding roof
Layer phenomenon so that polyurethane composite plate surfacing, have good presentation quality, meanwhile, also reduces polyurethane and is combined
The oder levels of sheet material, effectively improves the odor profiles of polyurethane composite plate, improves in-car air quality.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is:
A kind of processing method of the polyurethane composite plate of the present invention, its step is as follows:
A, tile on the conveyer belt of composite production line the first non-woven fabrics, sows the most successively or lay staple glass is fine
Dimension, hot-melt adhesive powder, hot melt adhesive film, PU plate, short glass fiber, hot-melt adhesive powder, then through the infrared preheating of 60-100%, heating
Plate is heated to 180-220 DEG C, carries out roll-in and is combined, more communicated band is sent to cooling zone under the pressure of 0.4-0.6MPa
Cool down, after cooling, be the composite of sandwich structure；
B, tile on the conveyer belt of composite production line the second non-woven fabrics, then sows successively or lay short glass fiber, hot melt
Rubber powder, the composite of sandwich structure, hot melt adhesive film, hot-melt adhesive powder, now first in the composite of sandwich structure
Non-woven fabrics faces up placement, and then through the infrared preheating of 10-50%, heater plate to 160-200 DEG C, in the pressure of 0.4-0.6MPa
Carry out roll-in under power to be combined, more communicated band is sent to cooling zone and cools down, and is polyurethane composite plate after cooling.
Improving further as the present invention, the type of cooling in step a and step b is water-cooled and air-cooled combination, its
In, the temperature cooling down water in water-cooling pattern is 25-30 DEG C, and the admission pressure in air cooling way is 3-7bar.
Improving further as the present invention, in step a and step b, the transfer rate of conveyer belt is 3.5-8m/min.
Improve further as the present invention, the first described non-woven fabrics be grammes per square metre be 35-55g/m2Fabric hot rolled nonwoven fabrics.
Improve further as the present invention, the second described non-woven fabrics be grammes per square metre be 35-55g/m2Imitative bonded non-woven fabrics or
Spun-laced nonwoven fabric.
Improve further as the present invention, described hot melt adhesive film be thickness be the high-density polyethylene of 0.03-0.07 mm
Alkene, modified poly ethylene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer, change
A kind of rubber moulding in sex ethylene-methacrylic acid copolymer hot melt adhesive film or several blend film.
Improve further as the present invention, described hot-melt adhesive powder be melt index be 14-22g/10min high density gather
Ethylene, modified poly ethylene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer,
The mixture of one or more in ethene improved-methacrylic acid copolymer hot-melt adhesive powder.
3. beneficial effect
Use the technical scheme that the present invention provides, compared with prior art, there is following remarkable result:
(1) processing method of a kind of polyurethane composite plate of the present invention, is cooled down by air-cooled and water-cooled combination,
Making original cooling wire body without transformation, reduce production cost, the polyurethane composite plate surface that final production goes out simultaneously is put down
Whole, and the bond quality between layers of material is good so that being not likely to produce delamination during molding roof, presentation quality is good.?
In the cooling procedure of step a and step b, the temperature cooling down water in water-cooling pattern is 25-30 DEG C, the air inlet pressure in air cooling way
Power is 3-7bar.In step a and step b, the transfer rate of conveyer belt is 3.5-8m/min, and applicant is through substantial amounts of life
Producing practice creatively to find, the range intervals of this three arranges the production most beneficial for polyurethane composite plate.
(2) processing method of a kind of polyurethane composite plate of the present invention, the quality with regard to polyurethane composite plate is passed through many
Group water-cooled contrasts from the two of air-cooled combination kinds of different types of cooling with water-cooled, uses popular PV3900 examination criteria, to life
The polyurethane composite plate that output is come carries out oder levels detection, the creative discovery of applicant by water-cooled and water-cooled with air-cooled
In conjunction with two kinds of different modes enter shape cooling time, the type of cooling of water-cooled and air-cooled combination can reduce poly-ammonia relative to water-cooling pattern
The oder levels of ester composite board, effectively improves the odor profiles of polyurethane composite plate, improves in-car air quality, and should
The changing value of oder levels is 0.5, and this is for this area, beyond doubt a great discovery, its technique effect reached
It is significant.
(3) processing method of a kind of polyurethane composite plate of the present invention, choosing polyurethane of hot melt adhesive film thickness is multiple
Bond effect between plywood material layers of material is critically important, and the thickness of hot melt adhesive film is excessive, and hot melt adhesive film heating can be caused impermeable,
Make cohesive force inadequate, finally easy delamination during this polyurethane composite plate molding roof；The thickness of hot melt adhesive film is too small, can be straight
Connect and cause cohesive force inadequate, ultimately result in easy delamination during molding roof.Hot melt adhesive film is more sensitive to temperature simultaneously, and temperature reaches
To a certain extent, hot melt adhesive film starts to soften, and less than uniform temperature, hot melt adhesive film will become fragile, so selecting hot melt adhesive film
During thickness, it is necessary to fully take into account the variations in temperature of product place environment.Technical staff gropes through constantly experiment, finally sends out
Now when the thickness of hot melt adhesive film is 0.03-0.07 mm most useful for production and application.
(4) processing method of a kind of polyurethane composite plate of the present invention, between the size of melt index is to composite
Bond effect there is certain impact, melt index is excessive, and hot-melt adhesive powder can be made to be easily dispersed in the abscess on PU plate,
The bond quality causing glass fiber net is poor；Melt index is too small, hot-melt adhesive powder can be made to be difficult to melt dispersion, finally also result in glass
The bond quality of fibre web is poor.Technical staff gropes through constantly experiment, finally found that when melt index is 14-22g/10min
Time most useful for production and application.
(5) processing method of a kind of polyurethane composite plate of the present invention, utilize different-grain diameter (α) hot-melt adhesive powder and
On the one hand the percentage ratio of different quality, avoids hot-melt adhesive powder particle diameter (α) is too small, particle diameter (α) is too small hot-melt adhesive powder quality relatively
Time many, during carrying out hot-melt adhesive powder dusting, the dusting amount of hot-melt adhesive powder is wayward；On the other hand PUR is avoided
When powder footpath (α) is excessive, particle diameter (α) is excessive hot-melt adhesive powder quality is more, hot-melt adhesive powder excessive during heating composite is not
Easily melting dispersion, these two aspects all can cause the off quality of polyurethane composite plate, and the present embodiment is by utilizing different grain
The hot-melt adhesive powder in footpath (α) and the percentage ratio of different quality so that the hot-melt adhesive powder of the particle diameter that varies in size (α) is during unrestrained
The hot-melt adhesive powder that particle diameter (α) can be made suitable is unrestrained uniformly, and heating is effective after dissolving；Carrying out hot-melt adhesive powder dusting simultaneously
During the dusting amount of hot-melt adhesive powder can be carried out good control.
Detailed description of the invention
For further appreciating that present disclosure, below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
A kind of processing method of the polyurethane composite plate of the present embodiment, its step is as follows:
A, tile on the conveyer belt of composite production line the first non-woven fabrics, and the grammes per square metre of the first non-woven fabrics is 35-55g/m2Heat
Roll non-woven fabrics, sow the most successively or lay short glass fiber, hot-melt adhesive powder, hot melt adhesive film, PU plate, staple glass
Fiber, hot-melt adhesive powder, then through the infrared preheating of 60-100%, heater plate to 180-220 DEG C, 0.4-0.6MPa's
Carry out roll-in under pressure to be combined, more communicated band is sent to cooling zone and cools down, after cooling, be the compound of sandwich structure
Material.The most in the present embodiment, grammes per square metre it is 35 g/m2Fabric hot rolled nonwoven fabrics, short glass fiber, hot-melt adhesive powder, hot melt
Glued membrane, PU plate, short glass fiber, the composite of hot-melt adhesive powder sandwich structure consisting, the composite wood of this sandwich structure
Material utilizes the infrared preheating of 60%, more heated plate is heated to 180 DEG C, finally carries out roll-in under the pressure of 0.4MPa multiple
Close.
B, tiling on the conveyer belt of composite production line, the grammes per square metre of the second non-woven fabrics is 35-55g/m2Imitative bonded non-woven fabrics
Or spun-laced nonwoven fabric, then sow successively or lay short glass fiber, hot-melt adhesive powder, the composite of sandwich structure, hot melt
Glued membrane, hot-melt adhesive powder, now the first non-woven fabrics in the composite of sandwich structure faces up placement, then red through 10-50%
Outer preheating, heater plate to 160-200 DEG C, under the pressure of 0.4-0.6MPa, carry out roll-in be combined, more communicated band transmission
Cool down to cooling zone, after cooling, be polyurethane composite plate.Concrete the most in the present embodiment, polyurethane composite plate under
It is 35g/m by grammes per square metre successively on and2Imitative bonded non-woven fabrics, short glass fiber, hot-melt adhesive powder, the composite wood of sandwich structure
Material, hot melt adhesive film, hot-melt adhesive powder form, and this polyurethane composite plate utilizes the infrared preheating of 10%, more heated plate is heated to
160 DEG C, under the pressure of 0.4MPa, finally carry out roll-in be combined.
The type of cooling during one of improvement of most critical is step a and step b in the present invention is water-cooled and air-cooled
In conjunction with, it should be understood that the type of cooling of polyurethane composite plate is divided into for water-cooled and air-cooled in prior art.Wherein, wind
Cold mode carries out cooling down brought defect: cooling effect is bad, if required up preferable cooling effect, then needs to prolong
Long production line, to increase cool time, reduces the production efficiency of polyurethane composite plate；Water-cooling pattern carries out cooling effect to be wanted
It is better than air-cooled cooling effect, but owing to water-cooling pattern cooling down the general minimum set of the temperature of water at 12 degree, hot season
Time, the temperature that arranges of cooling water also needs to higher, the condensed water on surface otherwise can be caused to be easy to low to composite material surface,
Cause the defects such as polyurethane composite plate surface irregularity.Additionally, some composite materials is difficult to cooling due to surface gluing thing, make
Obtaining water-cooled and be unable to reach intended cooling effect, the bond quality ultimately resulting in polyurethane composite plate is poor, and is individually for a few
Plant material and transform original wire body, production cost can be improved, therefore improve polyurethane composite plate by the original wire body of transformation each
Bond quality between layer material is unadvisable selection.For the temperature cooling down water in water-cooling pattern arrange too high or too low all
Polyurethane composite plate can be caused off quality, and the present embodiment solves this skill existed by air-cooled and water-cooled combination
Art problem, main body uses the mode of water-cooled, and supplements cooling effect by increasing air-cooled facility so that original cooling
Wire body without transformation, reduce production cost, the polyurethane composite plate surfacing that final production goes out simultaneously, and layers of material it
Between bond quality good so that being not likely to produce delamination during molding roof, presentation quality is good.
In the cooling procedure of step a and step b, the temperature cooling down water in water-cooling pattern is 25-30 DEG C, air cooling way
In admission pressure be 3-7bar.In step a and step b, the transfer rate of conveyer belt is 3.5-8m/min.Need explanation
: step a is to be mutually related between temperature and this three of admission pressure of the transfer rate of conveyer belt, cooling water,
Wherein the variation of any one parameter all can cause other two parameters to change therewith, certainly, and the setting of these three parameter and material
The selection of matter and the size of material are related.
After taking water-cooled to combine air cooling way, the minimum temperature of cooling water arranges higher than minimum temperature of the prior art
Go out 13 degree so that while meeting cooling effect, improve the quality on polyurethane composite plate surface.Admission pressure arrange one
Aspect compensate for the defect that water-cooled is not enough, and on the other hand applicant organizes water-cooleds and water with regard to the quality of polyurethane composite plate by more
Two kinds of different types of cooling of cold and air-cooled combination contrast, and use popular PV3900 examination criteria, poly-to produce
Urethane composite board carries out oder levels detection, and what applicant was creative finds two kinds by water-cooled and water-cooled and air-cooled combination
When different modes enters shape cooling, water-cooled can reduce polyurethane composite plate with the type of cooling of air-cooled combination relative to water-cooling pattern
Oder levels, effectively improve the odor profiles of polyurethane composite plate, improve the quality of air in car, and this oder levels
Changing value be 0.5, this is for this area, beyond doubt a great discovery, and what it was reached have the technical effect that significantly,
It is specifically shown in form 1.Vertical well known, ventilation can eliminate abnormal smells from the patient and belong to common knowledge, but the applicant does not send out through a large amount of retrievals
Existing prior art there is the oder levels being taken through air cooling way to reduce composite, air-cooled for what the application added
The type of cooling, in addition to can playing cooling effect, effectively solve existing for polyurethane composite plate cementability difference and
The problems such as surface irregularity, simultaneously, moreover it is possible to eliminate the part abnormal smells from the patient in polyurethane composite plate, reduce polyurethane composite plate
Oder levels, effectively improve the odor profiles of polyurethane composite plate, this is one of the key innovations of the present invention, thus
Visible, air-cooled addition is creative work.It should be added that due to polyurethane composite plate workshop
For open type, and whole operating process realizes automatization substantially, effectively alleviates pungent abnormal smells from the patient, it is ensured that working environment good
Sexual development, makes the healthy of operator be protected.The transfer rate of conveyer belt can not be excessive, otherwise can cause composite wood
The cooling effect of material is undesirable so that the surface gluing thing of composite does not cool and solidify, and causes gluing between layers of material
Knot weak effect；The transfer rate of conveyer belt can not be too small, otherwise can reduce production efficiency, it is impossible to Appropriate application produces wire body,
Improve production cost.Applicant through the creative discovery of substantial amounts of production practices, the conveyer belt gone out given in the present embodiment
It is to produce polyurethane composite plate that the range intervals of transfer rate, the cooling temperature of water and this three of admission pressure is arranged
Good range intervals is arranged.The most in the present embodiment, the composite of the sandwich structure that roll-in in step a is combined into, right
The polyurethane composite plate that in step b, roll-in is combined into all uses water-cooled to combine air-cooled mode and cools down, the temperature of cooling water
Degree is 25 DEG C, and admission pressure is 3bar, and the transfer rate of conveyer belt is 3.5m/min.
In the composite of the present embodiment the hot melt adhesive film of lay be thickness be 0.03-0.07 mm high density polyethylene (HDPE),
Modified poly ethylene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer, modification
A kind of rubber moulding in ethylene-methacrylic acid copolymer hot melt adhesive film or several blend film.Choosing of hot melt adhesive film thickness is right
Bond effect between polyurethane composite plate layers of material is critically important, and the thickness of hot melt adhesive film is excessive, can cause hot melt adhesive film
Heat impermeable so that cohesive force is inadequate, finally easy delamination during this polyurethane composite plate molding roof；The thickness of hot melt adhesive film
Too small, cohesive force can be directly resulted in inadequate, ultimately result in easy delamination during molding roof.Hot melt adhesive film is quicker to temperature simultaneously
Sense, temperature reaches to a certain degree, and hot melt adhesive film starts to soften, and less than uniform temperature, hot melt adhesive film will become fragile, so selecting heat
During the thickness of melten gel film, it is necessary to fully take into account the variations in temperature of product place environment.Technical staff touches through constantly experiment
Rope, finally found that when the thickness of hot melt adhesive film is 0.03-0.07 mm most useful for production and application.Concrete heat in the present embodiment
The thickness of melten gel film is 0.03 mm.
The hot-melt adhesive powder sowed in the composite of the present embodiment be melt index be 14-22g/10min high density gather
Ethylene, modified poly ethylene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer,
The mixture of one or more in ethene improved-methacrylic acid copolymer hot-melt adhesive powder.The size of melt index is to multiple
Bond effect between condensation material has certain impact, and melt index is excessive, and hot-melt adhesive powder can be made to be easily dispersed PU plate
On abscess in, the bond quality causing glass fiber net is poor；Melt index is too small, and hot-melt adhesive powder can be made to be difficult to melt dispersion,
The bond quality also resulting in glass fiber net eventually is poor.Technical staff gropes through constantly experiment, finally found that when melt index is
Most useful for production and application during 14-22g/10min.Concrete melt index in the present embodiment is 14g/10min.
The particle diameter (α) of the hot-melt adhesive powder sowed in the composite of the present embodiment is distributed as: the hot-melt adhesive powder of α >=220 μm
Account for mass percent≤6% of total hot-melt adhesive powder；220 μm > hot-melt adhesive powder of α >=110 μm accounts for the mass percent of total hot-melt adhesive powder
It is 51 ± 10%；110 μm > to account for the mass percent of total hot-melt adhesive powder be 30 ± 10% for the hot-melt adhesive powder of α >=77 μm；α ＜ 77 μm
Hot-melt adhesive powder accounts for mass percent≤13% of total hot-melt adhesive powder, utilizes the hot-melt adhesive powder and not of different-grain diameter (α) during this
The percentage ratio of homogenous quantities, on the one hand avoids the hot-melt adhesive powder quality that hot-melt adhesive powder particle diameter (α) is too small, particle diameter (α) is too small more
Time, during carrying out hot-melt adhesive powder dusting, the dusting amount of hot-melt adhesive powder is wayward；On the other hand hot-melt adhesive powder is avoided
When particle diameter (α) is excessive, particle diameter (α) is excessive hot-melt adhesive powder quality is more, hot-melt adhesive powder excessive during heating composite is difficult to
Melting dispersion, these two aspects all can cause the off quality of polyurethane composite plate, and the present embodiment is by utilizing different-grain diameter
(α) hot-melt adhesive powder and the percentage ratio of different quality so that the hot-melt adhesive powder of the particle diameter that varies in size (α) is energy during unrestrained
The hot-melt adhesive powder enough making particle diameter (α) suitable is unrestrained uniformly, and heating is effective after dissolving；Simultaneously in the mistake carrying out hot-melt adhesive powder dusting
Journey can carry out good control to the dusting amount of hot-melt adhesive powder.
In the present embodiment, the particle diameter (α) of hot-melt adhesive powder is 220 μm > hot-melt adhesive powder of α >=110 μm accounts for the matter of total hot-melt adhesive powder
Amount percentage ratio is 51 ± 10%, and the particle diameter (α) of hot-melt adhesive powder is 110 μm > hot-melt adhesive powder of α >=77 μm accounts for the matter of total hot-melt adhesive powder
Amount percentage ratio is 30 ± 10%, and applicant finds through substantial amounts of production practices, along with the reduction of hot-melt adhesive powder particle diameter (α), and its phase
To be gradually reduced molecular mass, but its trend reduced gradually slows down, hot-melt adhesive powder relative molecular mass reduces so that its
Intermolecular reaction force attenuation, its viscosity reduces so that it is show as the increase of hot-melt adhesive powder solution flow rate, so identical
Temperature retention time in the reduction of hot-melt adhesive powder particle diameter (α) unrestrained in composite, the melt flow speed of hot-melt adhesive powder can be made
Rate increases, so that the distribution of hot-melt adhesive powder solution is more uniform after composite heating, finally makes Rigid foam polyurethane
The molding effect of material is more preferable.
Embodiment 2
The processing method of a kind of polyurethane composite plate of the present embodiment, its process is substantially the same manner as Example 1, and difference exists
In: specifically in the present embodiment, the composite of sandwich structure is 45 g/m by grammes per square metre2Fabric hot rolled nonwoven fabrics, staple glass
Fiber, hot-melt adhesive powder, hot melt adhesive film, PU plate, short glass fiber, hot-melt adhesive powder form, the composite of this sandwich structure
Utilize the infrared preheating of 80%, more heated plate is heated to 200 DEG C, under the pressure of 0.5MPa, carry out roll-in be combined, finally
Using cooling water temperature is 27 DEG C, and admission pressure is that 5bar cools down；Polyurethane composite plate is the most successively by grammes per square metre
For 45g/m2Imitative bonded non-woven fabrics, short glass fiber, hot-melt adhesive powder, the composite of sandwich structure, hot melt adhesive film, hot melt
Rubber powder forms, and this polyurethane composite plate utilizes the infrared preheating of 30%, more heated plate is heated to 180 DEG C, in the pressure of 0.5MPa
Carrying out roll-in under power to be combined, finally using cooling water temperature is 28 DEG C, and admission pressure is that 5bar cools down.Whole production process
The transfer rate of middle conveyer belt is 5.5m/min.The thickness of concrete hot melt adhesive film in the present embodiment is 0.05 mm.Specifically exist
In the present embodiment, melt index is 18g/10min.
Embodiment 3
The processing method of a kind of polyurethane composite plate of the present embodiment, its process is substantially the same manner as Example 1, and difference exists
In: specifically in the present embodiment, the composite of sandwich structure is 55 g/m by grammes per square metre2Fabric hot rolled nonwoven fabrics, staple glass
Fiber, hot-melt adhesive powder, hot melt adhesive film, PU plate, short glass fiber, hot-melt adhesive powder form, the composite of this sandwich structure
Utilize the infrared preheating of 100%, more heated plate is heated to 220 DEG C, under the pressure of 0.6MPa, carry out roll-in be combined,
Rear employing cooling water temperature is 30 DEG C, and admission pressure is that 7bar cools down；Polyurethane composite plate the most successively by gram
It is heavily 55g/m2Spun-laced nonwoven fabric, short glass fiber, hot-melt adhesive powder, the composite of sandwich structure, hot melt adhesive film, heat
Melting powder forms, and this polyurethane composite plate utilizes the infrared preheating of 50%, more heated plate is heated to 200 DEG C, 0.6MPa's
Carrying out roll-in under pressure to be combined, finally using cooling water temperature is 30 DEG C, and admission pressure is that 7bar cools down.Whole produced
In journey, the transfer rate of conveyer belt is 8m/min.The thickness of concrete hot melt adhesive film in the present embodiment is 0.07 mm.Specifically exist
In the present embodiment, melt index is 22g/10min.
Above-described embodiment 1,2,3, obtained polyurethane composite plate uses the gas of popular PV3900 examination criteria detection
Taste grade is as follows:
Form 1
Claims (7)
1. the processing method of a polyurethane composite plate, it is characterised in that its step is as follows:
A, tile on the conveyer belt of composite production line the first non-woven fabrics, sows the most successively or lay staple glass is fine
Dimension, hot-melt adhesive powder, hot melt adhesive film, PU plate, short glass fiber, hot-melt adhesive powder, then through the infrared preheating of 60-100%, heating
Plate is heated to 180-220 DEG C, carries out roll-in and is combined, more communicated band is sent to cooling zone under the pressure of 0.4-0.6MPa
Cool down, after cooling, be the composite of sandwich structure；
B, tile on the conveyer belt of composite production line the second non-woven fabrics, then sows successively or lay short glass fiber, hot melt
Rubber powder, the composite of sandwich structure, hot melt adhesive film, hot-melt adhesive powder, now first in the composite of sandwich structure
Non-woven fabrics faces up placement, and then through the infrared preheating of 10-50%, heater plate to 160-200 DEG C, in the pressure of 0.4-0.6MPa
Carry out roll-in under power to be combined, more communicated band is sent to cooling zone and cools down, and is polyurethane composite plate after cooling.
The production method of a kind of roof of the vehicle sandwich base material the most according to claim 1, it is characterised in that: step a
Being water-cooled and air-cooled combination with the type of cooling in step b, wherein, the temperature cooling down water in water-cooling pattern is 25-30
DEG C, the admission pressure in air cooling way is 3-7bar.
The production method of a kind of roof of the vehicle sandwich base material the most according to claim 1, it is characterised in that: step a
It is 3.5-8m/min with the transfer rate of conveyer belt in step b.
The production method of a kind of roof of the vehicle sandwich base material the most according to claim 1, it is characterised in that: described
The first non-woven fabrics be grammes per square metre be 35-55g/m2Fabric hot rolled nonwoven fabrics.
The production method of a kind of roof of the vehicle sandwich base material the most according to claim 1, it is characterised in that: described
The second non-woven fabrics be grammes per square metre be 35-55g/m2Imitative bonded non-woven fabrics or spun-laced nonwoven fabric.
The production method of a kind of roof of the vehicle sandwich base material the most according to claim 1, it is characterised in that: described
Hot melt adhesive film be thickness be the high density polyethylene (HDPE) of 0.03-0.07 mm, modified poly ethylene, modified polypropene, ethene improved-
In acetate ethylene copolymer, ethene improved-acrylic copolymer, ethene improved-methacrylic acid copolymer hot melt adhesive film
A kind of rubber moulding or several blend film.
The production method of a kind of roof of the vehicle sandwich base material the most according to claim 1, it is characterised in that: described
Hot-melt adhesive powder be melt index be the high density polyethylene (HDPE) of 14-22g/10min, modified poly ethylene, modified polypropene, modified second
Alkene-acetate ethylene copolymer, ethene improved-acrylic copolymer, ethene improved-methacrylic acid copolymer PUR
The mixture of one or more in powder.
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| CN108219693A (en) * | 2018-01-31 | 2018-06-29 | 浙江高远新材料科技有限公司 | Glued membrane is bonded from the high sound absorption properties roof of the vehicle of trepanning |
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Denomination of invention: Method of processing polyurethane composite plate Effective date of registration: 20190628 Granted publication date: 20181113 Pledgee: Wuhu Yangzi rural commercial bank Limited by Share Ltd. Pledgor: WUXI ZHENGHAI AUTOMOTIVE INTERIOR CO.,LTD. Registration number: 2019340000314 |
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Denomination of invention: A processing method of polyurethane composite plate Effective date of registration: 20220701 Granted publication date: 20181113 Pledgee: Wuhu Tianmenshan sub branch of Huishang Bank Co.,Ltd. Pledgor: WUXI ZHENGHAI AUTOMOTIVE INTERIOR CO.,LTD. Registration number: Y2022980009707 |