Difference between PVB,EVA ,SGP interlayer
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Laminated glass is also known as safety glass. As the name suggests, laminated glass is composed of multiple layers of glass. Except for the glass, the interlayer in the middle of the glass. Usually there are three kinds of interlayers: EVA, PVB, SGP.
PVB
PVB is a widely used sandwich material for architectural glass and automotive glass.
The storage process and processing method of PVB interlayer is more complicated than EVA, and the requirements for temperature and humidity are high. When PVB is processed, the temperature is controlled between 18 °C and 23 °C, the relative humidity is controlled at 18-23%, and the PVB water content is maintained at 0.4%-0.6%. After preheating rolling or vacuuming, The autoclave was used for heat preservation and pressure keeping, the autoclave temperature was 120-130 ° C, the pressure was 1.0-1.3 MPa, and the time was 30-60 min. PVB complete sets of production equipment requires about 1 million funds, which is difficult for small businesses. A few years ago, it was mainly produced by DuPont, Solutia, and Sekisui. The China PVB was mainly recycled materials for secondary processing, but the quality stability was not very good. In recent years, China PVB manufacturers are also having great development.
PVB has good safety, sound insulation, transparency and UV resistance, but PVB has poor water resistance, and it is easy to delaminated when it is in a humid environment for a long time.
EVA
EVA ‘s cost performance is higher. Compared with PVB and SGP, EVA has better fluidity, lower melting temperature and can be processed at temperatures up to 110 °C.
EVA has a good fluidity of the film layer, and can be subjected to a process such as wire drawing and engraving in the film layer to produce a beautiful decorative glass with a pattern and a pattern. EVA has good water resistance, but its UV resistance is weak. It is easy to yellow and black in long-term sun exposure, so it is mainly used for indoor partitions
SGP
SGP is called the ionic interlayer film (SentryGlas Plus), which is a high-performance interlayer developed by DuPont. Its high performance is:
1. Excellent mechanical properties and high strength. At the same thickness, the SGP interlayer bearing capacity is twice that of PVB; under the same load and thickness, the bending deflection of SGP laminated glass is one quarter of PVB;
2, tear strength. At the same thickness, the PVB interlayer film has a tear strength of 5 times that of PVB, and can be bonded to the glass in the case of tearing without causing the entire glass to fall.
3, strong stability, moisture resistance. SGP laminated glass is colorless and transparent, anti-ultraviolet. After long-term sun and rain, it is not easy to turn yellow, and the yellowing coefficient is less than 1.5. However, the yellowing coefficient of PVB interlayer film is 6~12. Therefore, SGP is the darling of ultra-white laminated glass.
Although the production process of SGP is close to PVB, the terminal price is high.
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Technical field
The invention belongs to laminated glass technical field, be specifically related to a kind of SGP doubling glass and preparation method thereof.
Background technology
Laminated glass is by two panels or divided glass, between pressed from both sides one or more layers organic polymer intermediate coat, after special high temperature precompressed and high-temperature high-pressure craft process, make the compound glass product that glass and intermediate coat permanent adhesive are integrated.Conventional laminated glass intermediate coat has PVB, SGP, EVA, PU etc.Even if the glass in laminated glass is cracked, fragment also can be bonded on film, and broken glass surface still keeps neatly smooth.This is not only in order to avoid injury accident, and also because laminated glass has fabulous antidetonation invasive ability, intermediate coat can resist the continuous attack of the lethal weapon such as hammer, firewood cutter, and can also resist bullet within the long duration penetrates, and its safety precaution degree is high.
Wherein, SGP film is laminated glass ionomer intermediate coat, its excellent performance, and tearing strength is 5 times of general PVB film, and hardness is 30-l00 times of PVB film.During low deformation rate, SGP laminated glass shows as and plays plastic properties and PVB is superlastic plasticity, and during high strain rate, and PVB is hardening and become bullet plastic properties, and SGP rigidity in gamut is higher.The monolithic glass of SGP laminated glass and same thickness is how many equal bending strength.Compare with other intermediate coat laminated glass, SGP laminated glass has higher strength character and rigidity, effectively can reduce thickness of glass, is particularly of value to point type support glass.SGP laminated glass has a extensive future at design of glass lighting roof and glass exterior window, curtain wall, well.SGP doubling glass is as very reliable safety glass, particularly be widely used in some important explosion-proof places at building field, SGP doubling glass is produced by certain production technology by more than 2 glass and SGP film, because the material of SGP film is harder, film can only produce the sheet material of certain specification, the demand of various doubling glass cannot be met, this just needs to splice according to glass size size, and ensures not dock vestige at joint and do not have the defects such as bubble.In existing SGP doubling glass production technology, when film size cannot meet order needs, required film is carried out cutting according to glass-board surface size, and use electric iron to be stitched together by SGP film, production and processing is carried out again according to the doubling glass mode of production, this production technology is discontinuous production, and production efficiency is very low.SGP film needs a large amount of time to splice, and the trace spliced as seen in stitching portion and easily produce many minute bubbles in stitching portion, product boil the requirement that experiment also cannot reach the world.Cause the reason of above-mentioned shortcoming to be because glass-board surface is comparatively large, 2 or all stitching portion of multi-disc SGP film are all welded together spent time with electric iron longer; After subsequent production machines, clearly can see the vestige of splicing; If splicing work disposal is bad, be easy to produce minute bubbles in stitching portion thus cause waste product.
Summary of the invention
In order to solve the problem, a kind of stitching portion is the object of the present invention is to provide not dock the SGP doubling glass of the defect such as vestige and bubble.
Two of object of the present invention there is provided the preparation method of described SGP doubling glass, and the method not only increases production efficiency and product quality, makes the production process of SGP doubling glass achieve continuous seepage simultaneously.
The present invention is achieved through the following technical solutions:
A kind of SGP doubling glass, comprise at least two blocks of glass and be folded in the SGP glue-line between two blocks of glass, described SGP glue-line is spliced by least two pieces of SGP substrates, and described two pieces of SGP substrate stitching portions are also folded with a SGP adhesive tape identical with described SGP substrate material.SGP substrate can not be fused together, and the place in gap inherently starved, to only have subsides SGP to supplement could fill a vacancy the place of splicing.
Preferably, the length of described SGP adhesive tape is identical with the width of described SGP substrate.
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Preferably, the thickness of described SGP adhesive tape is 0.89mm.
Preferably, the width of described SGP adhesive tape is 6 ~ 10mm.
Preferably, the thickness of described two pieces of SGP substrates is 1.52 ~ 3.04mm.The size of SGP adhesive tape is comparatively crucial, also very little, finally still need not need not have obvious joint seam trace too much, affect attractive in appearance too much; Fill out discontented gap very little, can produce bubble, the capacity that preferably just can fill up seam is just much of that.
The preparation method of described SGP doubling glass, is specially:
A. the SGP substrate of certain specification is selected according to glass length and specification;
B. cut the SGP adhesive tape of corresponding size according to SGP substrate, first piece is laid SGP substrate;
C. the SGP adhesive tape described in is overlapped on the top of each SGP substrate seam crossing; SGP glue is overlapped on the top of two pieces of SGP substrate seam crossings.
D. after all seam crossings have all overlapped SGP adhesive tape, then the second sheet glass and first are carried out conjunction sheet;
If multilayer doubling glass, this can repeat above-mentioned steps.
E. the glass after conjunction sheet is put in vacuum bag and carry out vacuumizing process;
F. finally pressing process is carried out, obtained described SGP doubling glass.
Preferably, in described step e, vacuum is more than-0.6MP ~-1.0MP.Vacuumize, can eject by seam crossing air, avoid the formation of steam bubble.
Preferably, in described step F, pressing pressure 12 ~ 14MP, temperature 135 ~ 145 DEG C.
The SGP glue-line that the present invention includes upper and lower two blocks of glass and be folded between two blocks of glass, described SGP glue-line is spliced by least two pieces of SGP substrates, and described two pieces of SGP substrate stitching portions are also folded with a SGP adhesive tape identical with described SGP substrate material; And obtain with high-temperature laminating by vacuumizing.It mainly utilizes film, and in autoclave, film is under the state of high pressure and high temperature, and film has the feature of mobility, the melting being filled up in the space of the seam crossing of film at high temperature and pressure of a film of overlap joint, thus reaches product requirement.Final obtained SGP doubling glass stitching portion is made not have film to dock the defect such as vestige and bubble.The method not only increases production efficiency and product quality, makes the production process of SGP doubling glass achieve continuous seepage simultaneously; And the cooperatively interacting of subsequent production technique, make product quality reach Standard.
Accompanying drawing explanation
Structural representation in Fig. 1 the present invention before embodiment 1 pressing,
The structural representation of embodiment 1 in Fig. 2 the present invention,
The structural representation of embodiment 2 in Fig. 3 the present invention,
The structural representation of embodiment 3 in Fig. 4 the present invention.
concrete embodiment
Below in conjunction with detailed description of the invention, the present invention is described in further detail, understands the present invention to help those skilled in the art.
Embodiment 1
See Fig. 1, Fig. 2, a kind of SGP doubling glass, the SGP glue-line comprising upper and lower two blocks of glass (12,11) and be folded between two blocks of glass, SGP glue-line is spliced by two pieces of SGP substrates (21,22), and two pieces of SGP substrate (21,22) stitching portions are also folded with a SGP adhesive tape 31 identical with described SGP substrate material.The length of SGP adhesive tape 31 is identical with the width of described SGP substrate, and the thickness of SGP adhesive tape is the width of 0.89mm, SGP adhesive tape is 6mm.The thickness of described two pieces of SGP substrates is 1.52mm.
The preparation method of described SGP doubling glass, is specially:
A. the SGP substrate of certain specification is selected according to glass length and specification;
B. cut the SGP adhesive tape of corresponding size according to SGP substrate, first piece 11 is laid SGP substrate (21,22);
C. the SGP adhesive tape 31 described in is overlapped on the top of SGP substrate (21,22) seam crossing; In order to represent the gap between two pieces of SGP substrates (21,22), have certain distance so show in figure between two pieces of SGP substrates (21,22), in fact two pieces of SGP substrates (21,22) are close to.
D. the second sheet glass 12 is carried out conjunction sheet with first piece 11; Glass after conjunction sheet is put in vacuum bag and carries out vacuumizing process; Vacuum is more than-0.6MP ~-1.0MP.
E. pressing process (pressure 12 ~ 14MP, temperature 135 ~ 145 DEG C) is finally carried out, obtained described SGP doubling glass.
Embodiment 2
See Fig. 3, a kind of SGP doubling glass, the SGP glue-line comprising upper and lower two blocks of glass (11,12) and be folded between two blocks of glass, SGP glue-line is spliced by polylith SGP substrate (21,22,23), and two pieces of SGP substrate stitching portions are also folded with a SGP adhesive tape (31,31,32,33) identical with described SGP substrate material.The length of SGP adhesive tape is identical with the width of described SGP substrate, and the thickness of SGP adhesive tape is the width of 0.89mm, SGP adhesive tape is 10mm.The thickness of described two pieces of SGP substrates is 3.04mm.The preparation method of described SGP doubling glass, implements 1 with concrete.
Embodiment 3
See Fig. 4, a kind of SGP doubling glass, comprise upper and lower three blocks of glass (11,12,13) and the SGP glue-line be folded between three blocks of glass and the 2nd SGP glue-line, one SGP glue-line is spliced by two pieces of SGP substrates (21,22), certainly also can be spliced by polylith SGP substrate according to the size of glass herein.Two pieces of SGP substrate (21,22) stitching portions are also folded with a SGP adhesive tape 31 identical with described SGP substrate material.2nd SGP glue-line is spliced by two pieces of SGP substrates (23,24), certainly also can be spliced by polylith SGP substrate according to the size of glass herein.Two pieces of SGP substrate (23,24) stitching portions are also folded with a SGP adhesive tape 32 identical with described SGP substrate material.The length of SGP adhesive tape, width and thickness are determined according to the thickness of SGP substrate.
The preparation method of described SGP doubling glass, is specially:
A. the SGP substrate of certain specification is selected according to glass length and specification;
B. cut the SGP adhesive tape of corresponding size according to SGP substrate, first piece 11 is laid two pieces of SGP substrates (21,22) of ground floor;
C. a SGP adhesive tape 31 is overlapped on the top of two pieces of SGP substrates (21, the 22) seam crossing of ground floor; SGP glue is overlapped on the top of two pieces of SGP substrate seam crossings.
D. after all seam crossings have all overlapped SGP adhesive tape, then by the second sheet glass 12 gland on the SGP film of ground floor;
E. on the second sheet glass 12, lay two pieces of SGP substrates (23,24) of the second layer;
F. a SGP adhesive tape 32 is overlapped on the top of two pieces of SGP substrates (23, the 24) seam crossing of the second layer; SGP glue is overlapped on the top of two pieces of SGP substrate seam crossings.
G. after all seam crossings have all overlapped SGP adhesive tape, then by the 3rd sheet glass 13 gland on the SGP film of the second layer; If multilayer doubling glass, this can repeat above-mentioned steps.
H. the glass after conjunction sheet is put in vacuum bag and carry out vacuumizing process; Vacuum is more than-0.6MP ~-1.0MP.
I. pressing process (pressure 12 ~ 14MP, temperature 135 ~ 145 DEG C) is finally carried out, obtained described SGP doubling glass.
Above-described embodiment, just preferred embodiment of the present invention, is not used for limiting the scope of the present invention, therefore all equivalences done with the feature described in the claims in the present invention and principle change or modify, and all should be included within the claims in the present invention scope.
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