CN106042529B - A kind of processing method of polyurethane composite plate - Google Patents
A kind of processing method of polyurethane composite plate Download PDFInfo
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- CN106042529B CN106042529B CN201610412913.3A CN201610412913A CN106042529B CN 106042529 B CN106042529 B CN 106042529B CN 201610412913 A CN201610412913 A CN 201610412913A CN 106042529 B CN106042529 B CN 106042529B
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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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of processing methods of polyurethane composite plate, belong to composite processing field, its by the first non-woven fabrics, short glass fiber, hot-melt adhesive powder, hot melt adhesive film, PU plates, short glass fiber and hot-melt adhesive powder sandwich structure consisting composite material；Hot melt adhesive film is set successively on the composite material of the face-up sandwich structure of the first non-woven fabrics, hot-melt adhesive powder, hot-melt adhesive powder is set successively under the composite material of the face-up sandwich structure of the first non-woven fabrics, short glass fiber and the second non-woven fabrics, its production method is that each layer is compounded to form polyurethane composite plate through roll-in, bond quality between layers of material is remarkably improved in polyurethane composite plate using the technical program, it avoids being also easy to produce delamination when molding roof, make polyurethane composite plate surfacing, with good presentation quality, simultaneously, also reduce the oder levels of polyurethane composite plate, effectively improve the odor profiles of polyurethane composite plate.
Description
Technical field
The present invention relates to composites processing technology field more particularly to a kind of processing sides of polyurethane composite plate
Method.
Background technology
Polyurethane composite plate is the roof interior decorative composite board of auto industry, is the mainstream production in current domestic roof market
Product.Orthodox car inner decorative ceiling, framework material mainly use cardboard and EPS foamed boards, and manufacturing process is complicated, the production of production
Product are yielding, gradually replaced by polyurethane composite plate.Compared with traditional material, polyurethane composite plate roof, which has, to be inhaled
Sound, it is heat-insulated, light-weight, easy to install the features such as, not only become top of car standard configuration, be also applied to pick up, micro- face, heavy truck
Equal fields.
With the development of auto industry, requirement of the user to automobile various aspects is also being gradually increased.New interior decoration materials
In contain some toxic gases, can make one the symptoms such as headache, weak occur, suck harmful to health, therefore in-vehicle air for a long time
Quality has become the important indicator of purchase vehicle, how to reduce material for car interior trim parts oder levels, improving the quality of in-vehicle air is
At present the technical issues of urgent need to resolve, the production method of common compound polyurethane material is mainly the following：
Through retrieval, China Patent No.：200710016820X, the applying date：On 07 06th, 2007, invention and created name：Multiply
With in-car decorations ceiling and its production technology, the multilayer composite board of polyurethane of process production be non-woven fabrics is unreeled it is compound
On the conveyer belt of line, it is viscous to sow or lay successively short glass fiber, hot melt adhesive stick, PU plates, short glass fiber, hot melt adhesive
Agent is heated to 150-260 DEG C through recombination line, composite board is made after heated under a certain pressure, cooling.Although the production
Technique is to go out Rigid foam polyurethane by One-step production, but the disadvantages of this method uneven, non-woven fabrics that is that hot-melt adhesive powder is sowed
The solids hot melt adhesive force difference Nian Jie with PU plates in face is also easy to produce delamination, surface irregularity and other issues when being molded roof.
Through retrieval, China Patent No.：2011103980826, the applying date：On December 05th, 2011, invention and created name：One
Kind roof of the vehicle sandwich base material and its production method, present application is by I layers of non-woven fabrics, the first short glass fiber
Layer, the first hot melt adhesive bisque, the first hot melt adhesive film layer, PU plates layer, the second short glass fiber layer, the second hot melt adhesive bisque group
At first type sandwich base material；The second hot melt adhesive film layer and third hot melt adhesive bisque are set successively on first type sandwich base material, first
II layers of the 4th hot melt adhesive bisque, third short glass fiber and non-woven fabrics are set under type sandwich base material successively；Its production method
It is that each layer is combined into roof of the vehicle sandwich base material through roll-in；The sandwich base material has good anti-flammability, bending strength
And bending modulus, there is good dimensional stability and weatherability.But this application is disadvantageous in that：The production technology is given birth to
There are bad adhesions, surface irregularity and other issues for the roof of the vehicle sandwich base material of output, easily lead to roof of the vehicle
It is off quality, while the production technology not can effectively improve the odor profiles of sandwich base material.
Invention content
1. technical problems to be solved by the inivention
In order to solve the bad adhesion between polyurethane composite plate layers of material in the prior art, surface irregularity etc. is no
Foot, the present invention provides a kind of processing method of polyurethane composite plate, the invention is characterized in that water cooling and air-cooled being combined
Cooling mode is remarkably improved in polyurethane composite plate bond quality between layers of material, avoids easily producing when molding roof
Raw delamination so that polyurethane composite plate surfacing has good presentation quality, meanwhile, also reduce polyurethane
The oder levels of composite board effectively improve the odor profiles of polyurethane composite plate, improve in-car air quality.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of processing method of polyurethane composite plate of the present invention, its step are as follows：
A, tile the first non-woven fabrics on the conveyer belt of composite production line, sows or lay successively in the above staple glass
Fiber, hot-melt adhesive powder, hot melt adhesive film, PU plates, short glass fiber, hot-melt adhesive powder add then through the infrared preheatings of 60-100%
Hot plate is heated to 180-220 DEG C, and progress roll-in is compound under the pressure of 0.4-0.6MPa, then communicated band is sent to cooling
Area is cooled down, and is the composite material of sandwich structure after cooling；
B, tile the second non-woven fabrics on the conveyer belt of composite production line, then sow or lay successively short glass fiber,
Hot-melt adhesive powder, the composite material of sandwich structure, hot melt adhesive film, hot-melt adhesive powder, at this time in the composite material of sandwich structure
First non-woven fabrics is placed up, and then through the infrared preheatings of 10-50%, heater plate is to 160-200 DEG C, in 0.4-0.6MPa
Pressure under to carry out roll-in compound, then communicated band is sent to cooling zone and cooled down, and is polyurethane composite plate after cooling.
It being further improved as the present invention, the type of cooling in step a and step b is water cooling and air-cooled combination,
In, the temperature of cooling water is 25-30 DEG C in water-cooling pattern, and the admission pressure in air cooling way is 3-7bar.
It is further improved as the present invention, the transmission speed of conveyer belt is 3.5-8m/min in step a and step b.
It is further improved as the present invention, first non-woven fabrics is that grammes per square metre is 35-55g/m2Fabric hot rolled nonwoven fabrics.
It is further improved as the present invention, second non-woven fabrics is that grammes per square metre is 35-55g/m2Imitative bonded non-woven fabrics or
Spunlace non-woven cloth.
It is further improved as the present invention, the hot melt adhesive film is the high-density polyethylene that thickness is 0.03-0.07 mm
Alkene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer, changes modified poly ethylene
A kind of rubber moulding in sex ethylene-methacrylic acid copolymer hot melt adhesive film or several blend films.
It is further improved as the present invention, the hot-melt adhesive powder is that the high density that melt index is 14-22g/10min is poly-
Ethylene, modified poly ethylene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer,
The mixture of one or more of ethene improved-methacrylic acid copolymer hot-melt adhesive powder.
3. advantageous effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result：
（1）A kind of processing method of polyurethane composite plate of the present invention is carried out by air-cooled and water cooling combination
It is cooling so that original cooling wire body reduces production cost, while the polyurethane composite plate table that final production goes out without transformation
Face is smooth, and the bond quality between layers of material is good so that is not likely to produce delamination, presentation quality when molding roof
It is good.In the cooling procedure of step a and step b, the temperature of cooling water is 25-30 DEG C in water-cooling pattern, in air cooling way
Admission pressure is 3-7bar.The transmission speed of conveyer belt is 3.5-8m/min in step a and step b, and applicant is through excessive
The production practices of amount creatively find that the production most beneficial for polyurethane composite plate is arranged in the range intervals of this three.
（2）A kind of processing method of polyurethane composite plate of the present invention, with regard to polyurethane composite plate quality by more
Group water cooling and water cooling are compared from two kinds of different types of cooling of air-cooled combination, using public PV3900 examination criterias, to life
The polyurethane composite plate that output is come carries out oder levels detection, the discovery of applicant's creativeness by water cooling and water cooling with it is air-cooled
In conjunction with two kinds of different modes cooled down into shape when, the type of cooling of water cooling and air-cooled combination can reduce poly- ammonia relative to water-cooling pattern
The oder levels of ester composite board effectively improve the odor profiles of polyurethane composite plate, improve in-car air quality, and should
The changing value of oder levels is 0.5, this is for this field, a undoubtedly great discovery, the technique effect reached
It is significant.
（3）The selection of a kind of processing method of polyurethane composite plate of the present invention, hot melt adhesive film thickness is multiple to polyurethane
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,
So that cohesive force is inadequate, the final polyurethane composite plate is easy delamination when being molded roof；The thickness of hot melt adhesive film is too small, can be straight
Connecing causes cohesive force inadequate, and delamination is easy when eventually leading to 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 is less than certain temperature, and hot melt adhesive film will become fragile, so selection hot melt adhesive film
When thickness, it is necessary to the temperature change of environment where fully taking into account product.Technical staff gropes by continuous experiment, final to send out
Now when the thickness of hot melt adhesive film is 0.03-0.07 mm most useful for production and application.
（4）A kind of processing method of polyurethane composite plate of the present invention, the size of melt index is between composite material
Bond effect have it is certain influence, melt index is excessive, and hot-melt adhesive powder can be made to be easily dispersed in the abscess on PU plates,
Cause the bond quality of glass fiber net poor；Melt index is too small, and hot-melt adhesive powder can be made to be not easy to melt dispersion, finally also result in glass
The bond quality of fibre web is poor.Technical staff gropes by continuous experiment, finally found that when melt index is 14-22g/10min
When most useful for production and application.
（5）A kind of processing method of polyurethane composite plate of the present invention, utilizes different-grain diameter（α）Hot-melt adhesive powder and
On the one hand the percentage of different quality avoids hot-melt adhesive powder grain size（α）Too small, grain size（α）Too small hot-melt adhesive powder quality compared with
When more, the dusting amount of hot-melt adhesive powder is not easy to control during carrying out hot-melt adhesive powder dusting；On the other hand hot melt adhesive is avoided
Powder diameter（α）Excessive, grain size（α）When excessive hot-melt adhesive powder quality is more, hot-melt adhesive powder excessive when composite material is heated not
Easily melt dispersion, these two aspects can all lead to the off quality of polyurethane composite plate, and the present embodiment is by using different grains
Diameter（α）Hot-melt adhesive powder and different quality percentage so that grain size of different sizes（α）Hot-melt adhesive powder during unrestrained
It can make grain size（α）Hot-melt adhesive powder appropriate is unrestrained uniform, and it is good that rear effect is dissolved in heating；Carrying out hot-melt adhesive powder dusting simultaneously
Good control can be carried out to the dusting amount of hot-melt adhesive powder in the process.
Specific implementation mode
To further appreciate that present disclosure, with reference to embodiment, the present invention is described in detail.
Embodiment 1
A kind of processing method of polyurethane composite plate of the present embodiment, its step are as follows：
A, tile the first non-woven fabrics on the conveyer belt of composite production line, and the grammes per square metre of the first non-woven fabrics is 35-55g/m2
Fabric hot rolled nonwoven fabrics, sow or lay successively in the above short glass fiber, hot-melt adhesive powder, hot melt adhesive film, PU plates, be chopped
Glass fibre, hot-melt adhesive powder, then through the infrared preheatings of 60-100%, heater plate is to 180-220 DEG C, in 0.4-
It is compound that roll-in is carried out under the pressure of 0.6MPa, then communicated band is sent to cooling zone and is cooled down, be sandwich knot after cooling
The composite material of structure.Specifically in the present embodiment, it is 35 g/m by grammes per square metre2Fabric hot rolled nonwoven fabrics, short glass fiber, hot melt
The composite material of rubber powder, hot melt adhesive film, PU plates, short glass fiber, hot-melt adhesive powder sandwich structure consisting, the sandwich knot
The composite material of structure utilizes 60% infrared preheating, then heated plate to be heated to 180 DEG C, finally under the pressure of 0.4MPa
It is compound to carry out roll-in.
B, it tiles 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 spunlace non-woven cloth, then short glass fiber, hot-melt adhesive powder, the composite material of sandwich structure, hot melt are sowed or laid successively
Glued membrane, hot-melt adhesive powder, at this time the first non-woven fabrics in the composite material of sandwich structure place up, it is then red through 10-50%
Outer preheating, heater plate is to 160-200 DEG C, and progress roll-in is compound under the pressure of 0.4-0.6MPa, then the transmission of communicated band
It is cooled down to cooling zone, is polyurethane composite plate after cooling.Specifically in the present embodiment, polyurethane composite plate is under
On and successively by grammes per square metre be 35g/m2Imitative bonded non-woven fabrics, short glass fiber, hot-melt adhesive powder, sandwich structure composite wood
Material, hot melt adhesive film, hot-melt adhesive powder composition, the polyurethane composite plate utilize 10% infrared preheating, then heated plate to be heated to
160 DEG C, it is compound that roll-in is finally carried out under the pressure of 0.4MPa.
It is water cooling and air-cooled that one of the improvement of most critical, which is the type of cooling in step a and step b, in the present invention
In conjunction with, it should be noted that：The type of cooling of polyurethane composite plate is divided into for water cooling and air-cooled in the prior art.Wherein, wind
Cold mode carries out cooling caused defect：Cooling effect is bad, reaches preferable cooling effect if necessary, then needs to prolong
Long-living producing line reduces the production efficiency of polyurethane composite plate to increase cooling time；Water-cooling pattern carries out cooling effect and wants
Better than air-cooled cooling effect, but since the general minimum set of the temperature of cooling water in water-cooling pattern is at 12 degree, hot season
When, the setting temperature 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,
The defects of causing polyurethane composite plate surface irregularity.In addition, some composite materials make since surface gluing object is not easy to cool down
It obtains water cooling and is unable to reach expected cooling effect, the bond quality for eventually leading to polyurethane composite plate is poor, and is individually for a few
Original wire body is transformed in kind material, can improve production cost, therefore each to improve polyurethane composite plate by the way that original wire body is transformed
Bond quality between layer material is unadvisable selection.It is too high or too low all for the temperature setting of cooling water in water-cooling pattern
Polyurethane composite plate can be caused off quality, the present embodiment solves this existing skill by air-cooled and water cooling combination
Art problem, main body supplement cooling effect by the way of water cooling, and by increasing air-cooled facility so that original cooling
Wire body without transformation, reduce production cost, while the polyurethane composite plate surfacing that final production goes out, and layers of material it
Between bond quality it is good so that molding roof when be not likely to produce delamination, presentation quality is good.
In the cooling procedure of step a and step b, the temperature of cooling water is 25-30 DEG C in water-cooling pattern, air cooling way
In admission pressure be 3-7bar.The transmission speed of conveyer belt is 3.5-8m/min in step a and step b.It needs to illustrate
Be：It is to be mutually related between the transmission speed of conveyer belt in step a, the temperature of cooling water and admission pressure this three,
Wherein the variation of any one parameter can all cause other two parameters to change, certainly, the setting of these three parameters and material therewith
The selection of matter and the size of material are related.
After taking water cooling combination air cooling way, minimum temperature height than in the prior art is arranged in the minimum temperature of cooling water
Go out 13 degree so that while meeting cooling effect, improve the quality on polyurethane composite plate surface.The setting one of admission pressure
Aspect compensates for the insufficient defect of water cooling, and another aspect applicant passes through multigroup water cooling and water with regard to the quality of polyurethane composite plate
It is cold to be compared from two kinds of different types of cooling of air-cooled combination, it is poly- to what is produced using public PV3900 examination criterias
Urethane composite board carries out oder levels detection, and the creative discovery of applicant passes through two kinds of water cooling and water cooling and air-cooled combination
When different modes are cooled down into shape, water cooling and the type of cooling of air-cooled combination can reduce polyurethane composite plate relative to water-cooling pattern
Oder levels, effectively improve the odor profiles of polyurethane composite plate, improve the quality of in-vehicle air, and the oder levels
Changing value be 0.5, this is for this field, a undoubtedly great discovery, and having the technical effect that for being reached is significant,
It is specifically shown in table 1.Vertical well known, ventilation can eliminate smell and belong to common knowledge, but the applicant does not send out through a large amount of retrievals
Now have in the prior art and is taken through air cooling way to reduce the oder levels of composite material, it is air-cooled for what is be added in the application
The type of cooling, other than it can play cooling effect, cementability difference present in effective solution polyurethane composite plate and
The problems such as surface irregularity, simultaneously, moreover it is possible to eliminate the part smell in polyurethane composite plate, reduce polyurethane composite plate
Oder levels, effectively improve the odor profiles of polyurethane composite plate, this for the present invention one of key innovations, thus
As it can be seen that air-cooled addition is creative labour.It should be added that due to polyurethane composite plate workshop
For open type, and whole operation process realizes automation substantially, and pungent smell has been effectively relieved, ensure that the good of working environment
Sexual development makes the health of operating personnel be protected.The transmission speed of conveyer belt cannot be excessive, otherwise can lead to composite wood
The cooling effect of material is undesirable so that the surface gluing object of composite material does not cool and solidify, and causes viscous between layers of material
It is poor to tie effect；The transmission speed of conveyer belt can not be too small, otherwise can reduce production efficiency, cannot rationally utilize production wire body,
Improve production cost.Discovery of the applicant Jing Guo a large amount of production practices creativeness, the conveyer belt gone out given in the present embodiment
The range intervals setting of transmission speed, the temperature of cooling water and admission pressure this three be production polyurethane composite plate most
Good range intervals setting.Specifically in the present embodiment, right to the composite material for the sandwich structure that roll-in in step a is combined into
The polyurethane composite plate that roll-in is combined into step b is all made of water cooling and is cooled down in conjunction with air-cooled mode, the temperature of cooling water
Degree is 25 DEG C, and admission pressure is 3bar, and the transmission speed of conveyer belt is 3.5m/min.
The hot melt adhesive film laid in the composite material of the present embodiment 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 films.The selection pair of hot melt adhesive film thickness
Bond effect between polyurethane composite plate layers of material is critically important, and the thickness of hot melt adhesive film is excessive, can lead to hot melt adhesive film
It heats impermeable so that cohesive force is inadequate, and the final polyurethane composite plate is easy delamination when being molded roof；The thickness of hot melt adhesive film
Too small, it is inadequate to directly result in cohesive force, and delamination is easy when eventually leading to molding roof.Hot melt adhesive film is quicker to temperature simultaneously
Sense, temperature reache a certain level, and hot melt adhesive film starts to soften, and are less than certain temperature, and hot melt adhesive film will become fragile, so selection heat
When the thickness of melten gel film, it is necessary to the temperature change of environment where fully taking into account product.Technical staff touches by continuous 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.It is specifically hot in the present embodiment
The thickness of melten gel film is 0.03 mm.
The hot-melt adhesive powder sowed in the composite material of the present embodiment is that the high density that melt index is 14-22g/10min is poly-
Ethylene, modified poly ethylene, modified polypropene, ethene improved-acetate ethylene copolymer, ethene improved-acrylic copolymer,
The mixture of one or more of ethene improved-methacrylic acid copolymer hot-melt adhesive powder.The size of melt index is to multiple
Bond effect between condensation material has certain influence, and melt index is excessive, and hot-melt adhesive powder can be made to be easily dispersed PU plates
On abscess in, cause the bond quality of glass fiber net poor；Melt index is too small, hot-melt adhesive powder can be made to be not easy to melt dispersion, most
The bond quality for also resulting in glass fiber net eventually is poor.Technical staff gropes by continuous experiment, finally found that when melt index is
Most useful for production and application when 14-22g/10min.Specifically melt index is 14g/10min in the present embodiment.
The grain size for the hot-melt adhesive powder sowed in the composite material of the present embodiment（α）It is distributed as：The hot-melt adhesive powder of α >=220 μm
Account for mass percent≤6% of total hot-melt adhesive powder；220μm>The hot-melt adhesive powder of α >=110 μm accounts for the mass percent of total hot-melt adhesive powder
It is 51 ± 10%；110μm>The mass percent that the hot-melt adhesive powder of α >=77 μm accounts for total hot-melt adhesive powder is 30 ± 10%；77 μm of α <'s
Hot-melt adhesive powder accounts for mass percent≤13% of total hot-melt adhesive powder, this utilizes different-grain diameter in the process（α）Hot-melt adhesive powder and not
On the one hand the percentage of homogenous quantities avoids hot-melt adhesive powder grain size（α）Too small, grain size（α）Too small hot-melt adhesive powder quality is more
When, the dusting amount of hot-melt adhesive powder is not easy to control during carrying out hot-melt adhesive powder dusting；On the other hand hot-melt adhesive powder is avoided
Grain size（α）Excessive, grain size（α）When excessive hot-melt adhesive powder quality is more, excessive hot-melt adhesive powder is not easy when heating composite material
Melt dispersion, these two aspects can all lead to the off quality of polyurethane composite plate, and the present embodiment is by using different-grain diameter
（α）Hot-melt adhesive powder and different quality percentage so that grain size of different sizes（α）Hot-melt adhesive powder during unrestrained energy
Enough make grain size（α）Hot-melt adhesive powder appropriate is unrestrained uniform, and it is good that rear effect is dissolved in heating；Simultaneously in the mistake for carrying out hot-melt adhesive powder dusting
In journey good control can be carried out to the dusting amount of hot-melt adhesive powder.
The grain size of hot-melt adhesive powder in the present embodiment（α）It is 220 μm>The hot-melt adhesive powder of α >=110 μm accounts for the matter of total hot-melt adhesive powder
It is 51 ± 10% to measure percentage, the grain size of hot-melt adhesive powder（α）It is 110 μm>The hot-melt adhesive powder of α >=77 μm accounts for the matter of total hot-melt adhesive powder
It is 30 ± 10% to measure percentage, and applicant has found by a large amount of production practices, with hot-melt adhesive powder grain size（α）Reduction, phase
Molecular mass will be gradually reduced, but its trend reduced gradually slows down, hot-melt adhesive powder relative molecular mass reduces so that its
Intermolecular reaction force attenuation, viscosity reduce, and the increase of hot-melt adhesive powder solution flow rate are appeared as, so identical
Soaking time in the hot-melt adhesive powder grain size trickled down in composite material（α）Reduction, can make hot-melt adhesive powder melt flow speed
Rate increases, so that the distribution of hot-melt adhesive powder solution is more uniform after composite material heating, finally so that Rigid foam polyurethane
The molding effect of material is more preferable.
Embodiment 2
A kind of processing method of polyurethane composite plate of the present embodiment, process is substantially the same manner as Example 1, difference
Be in：Specifically in the present embodiment, the composite material of sandwich structure is 45 g/m by grammes per square metre2 Fabric hot rolled nonwoven fabrics, be chopped
Glass fibre, hot-melt adhesive powder, hot melt adhesive film, PU plates, short glass fiber, hot-melt adhesive powder composition, the sandwich structure it is compound
The infrared preheating of material use 80%, then heated plate are heated to 200 DEG C, and progress roll-in is compound under the pressure of 0.5MPa,
Finally use cooling water temperature for 27 DEG C, admission pressure is that 5bar is cooled down；Polyurethane composite plate from bottom to top successively by
Grammes per square metre is 45g/m2Imitative bonded non-woven fabrics, short glass fiber, hot-melt adhesive powder, the composite material of sandwich structure, hot melt adhesive film,
Hot-melt adhesive powder forms, which utilizes 30% infrared preheating, then heated plate to be heated to 180 DEG C, in 0.5MPa
Pressure under to carry out roll-in compound, finally use cooling water temperature for 28 DEG C, admission pressure is cooled down for 5bar.Entire production
The transmission speed of conveyer belt is 5.5m/min in the process.Specifically the thickness of hot melt adhesive film is 0.05 mm in the present embodiment.Tool
Melt index is 18g/10min to body in the present embodiment.
Embodiment 3
A kind of processing method of polyurethane composite plate of the present embodiment, process is substantially the same manner as Example 1, difference
Be in：Specifically in the present embodiment, the composite material of sandwich structure is 55 g/m by grammes per square metre2 Fabric hot rolled nonwoven fabrics, be chopped
Glass fibre, hot-melt adhesive powder, hot melt adhesive film, PU plates, short glass fiber, hot-melt adhesive powder composition, the sandwich structure it is compound
The infrared preheating of material use 100%, then heated plate are heated to 220 DEG C, and it is multiple that roll-in is carried out under the pressure of 0.6MPa
It closes, finally uses cooling water temperature for 30 DEG C, admission pressure is that 7bar is cooled down；Polyurethane composite plate is from bottom to top successively
It is 55g/m by grammes per square metre2Spunlace non-woven cloth, short glass fiber, hot-melt adhesive powder, the composite material of sandwich structure, hot melt adhesive
Film, hot-melt adhesive powder composition, the polyurethane composite plate utilize 50% infrared preheating, then heated plate to be heated to 200 DEG C,
It is compound that roll-in is carried out under the pressure of 0.6MPa, finally uses cooling water temperature for 30 DEG C, admission pressure is that 7bar is cooled down.It is whole
The transmission speed of conveyer belt is 8m/min in a production process.Specifically the thickness of hot melt adhesive film is 0.07 mm in the present embodiment
.Specifically melt index is 22g/10min in the present embodiment.
Above-described embodiment 1,2,3, the gas that obtained polyurethane composite plate is detected using masses' PV3900 examination criterias
Taste grade is as follows：
Table 1
Claims (7)
1. a kind of processing method of polyurethane composite plate, which is characterized in that its step are as follows：
A, tile the first non-woven fabrics on the conveyer belt of composite production line, sows or lay successively in the above staple glass fibre
Dimension, hot-melt adhesive powder, hot melt adhesive film, PU plates, short glass fiber, hot-melt adhesive powder, then through the infrared preheatings of 60-100%, heating plate
Be heated to 180-220 DEG C, under the pressure of 0.4-0.6MPa carry out roll-in it is compound, then communicated band be sent to cooling zone carry out it is cold
But, it is the composite material of sandwich structure after cooling；
B, tile the second non-woven fabrics on the conveyer belt of composite production line, then sows or lay short glass fiber, hot melt successively
Rubber powder, the composite material of sandwich structure, hot melt adhesive film, hot-melt adhesive powder, at this time first in the composite material of sandwich structure
Non-woven fabrics is placed up, and then through the infrared preheatings of 10-50%, heater plate is to 160-200 DEG C, in the pressure of 0.4-0.6MPa
It is compound that roll-in is carried out under power, then communicated band is sent to cooling zone and is cooled down, be polyurethane composite plate after cooling；
Wherein, the grain size (α) of step a and the hot-melt adhesive powder sowed in step b, which is distributed, is：
The hot-melt adhesive powder of α >=220 μm accounts for mass percent≤6% of total hot-melt adhesive powder；
220μm>The mass percent that the hot-melt adhesive powder of α >=110 μm accounts for total hot-melt adhesive powder is 51 ± 10%；
110μm>The mass percent that the hot-melt adhesive powder of α >=77 μm accounts for total hot-melt adhesive powder is 30 ± 10%；
The hot-melt adhesive powder that 77 μm of α < accounts for mass percent≤13% of total hot-melt adhesive powder.
2. a kind of processing method of polyurethane composite plate according to claim 1, it is characterised in that：Step a and step b
In the type of cooling be water cooling and air-cooled combination, wherein the temperature of cooling water is 25-30 DEG C in water-cooling pattern, air-cooled
Admission pressure in mode is 3-7bar.
3. a kind of processing method of polyurethane composite plate according to claim 1, it is characterised in that：Step a and step b
The transmission speed of middle conveyer belt is 3.5-8m/min.
4. a kind of processing method of polyurethane composite plate according to claim 1, it is characterised in that：First nothing
Woven fabric is that grammes per square metre is 35-55g/m2Fabric hot rolled nonwoven fabrics.
5. a kind of processing method of polyurethane composite plate according to claim 1, it is characterised in that：Second nothing
Woven fabric is that grammes per square metre is 35-55g/m2Imitative bonded non-woven fabrics or spunlace non-woven cloth.
6. a kind of processing method of polyurethane composite plate according to claim 1, it is characterised in that：The hot melt adhesive
Film is that high density polyethylene (HDPE), modified poly ethylene, modified polypropene, ethene improved-vinyl acetate that thickness is 0.03-0.07mm are total
A kind of rubber moulding or several in polymers, ethene improved-acrylic copolymer, ethene improved-methacrylic acid copolymer hot melt adhesive film
Kind blend film.
7. a kind of processing method of polyurethane composite plate according to claim 1, it is characterised in that：The hot melt adhesive
Powder is high density polyethylene (HDPE), modified poly ethylene, modified polypropene, the ethene improved-acetic acid that melt index is 14-22g/10min
Ethylene copolymer, ethene improved-acrylic copolymer, one kind in ethene improved-methacrylic acid copolymer hot-melt adhesive powder or
Several mixtures.
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