CN1231348C - Five-layer coextrusion biaxial extension polypropylene pearly-lustre synthetic paper and manufacturing method thereof - Google Patents
Five-layer coextrusion biaxial extension polypropylene pearly-lustre synthetic paper and manufacturing method thereof Download PDFInfo
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Abstract
The present invention discloses nacreous synthetic paper with five-layer coextrusion and dual spindle extension and a method for producing the nacreous synthetic paper. The nacreous synthetic paper with five-layer coextrusion and dual spindle extension has a stacking layer structure with five layers and the thickness of 30 to 300 micrometers, and is formed by stacking a top layer of a paper surface layer or a resin layer (A), a second layer of a paper surface layer or a resin layer (B), a foamed layer (C) clamped in the middle, a fourth layer of a paper surface layer or a resin layer (D), and the lowest layer of a paper surface layer or a resin layer (E). The production method can improve the rigidity, the masking performance, the interlayer strength, the brightness of the paper surfaces, the thickness of the paper, etc., of the nacreous synthetic paper. Moreover, the present invention can improve the printing adaptability of the nacreous synthetic paper.
Description
Affiliated technical field
The present invention relates to a kind of five-layer co-squeezing and press biaxial stretched polypropylene pearly synthetic paper, especially a kind of five-layer co-squeezing is pressed the layered structure prescription of biaxial stretched polypropylene pearly synthetic paper, to promote firm very property, covering property, paper brightness and the printing adaptability of co-extrusion pressure biaxial stretched polypropylene pearly synthetic paper.
Background technology
Over nearly 15 years, applicant company is absorbed in the quality that promotes three-layer co-extruded pressure biaxial stretched polypropylene pearly synthetic paper in research and development, to replace natural paper products is target to reach, successively obtain the Taiwan patent of invention at home and abroad No. 93725, No. 72218, No. 81707, No. 96548, No. 121111 and No. 144802, and No. the 181538th, novel patent; No. the 2968773rd, patent of invention of Japan, and novel patent No. 3007199 and No. 3072860; U.S.'s patent of invention No. 5551511, No. 6001290, No. 6364988 and No. 6379605; Continent patent of invention No. 86339, No. 85478, No. 91511 and No. 90113, and multinomial patents such as No. the 211522nd, novel patent and No. 411873.
Please refer to known three-layer co-extruded pressure twin shaft shown in Figure 2 and extend pearlescent synthetic paper (20), its by repeatedly put paper layer or resin bed (A1) in the superiors, be interposed in the intermediate layer foaming layer (B1), and repeatedly put at undermost paper layer or resin bed (C1), constitute three stacking layers of structure jointly.This known three-layer co-extruded pressure twin shaft extends pearlescent synthetic paper (20),
If in the time of will producing the lower product of proportion, must reduce to affiliated foaming layer (B1) proportion very low, need in foaming layer (B1), add a large amount of inorganic fillers, reaching the extension foaming effect, but add the consequence of a large amount of inorganic fillers, be when extrusion, have a large amount of frictional heats and produce and make too fusion of plastics, cause producing more not smooth, so, must reduce frictional heat by reduction of speed, be unfavorable for reducing production costs and guaranteed quality stable.
In the time will improving the covering property quality of three-layer co-extruded pressure twin shaft extension pearlescent synthetic paper (20), need extend each stacking layer of pearlescent synthetic paper (20) or concentrate in the wherein a certain stacking layer at three-layer co-extruded pressure twin shaft and add a large amount of inorganic powders, but add the consequence of a large amount of inorganic powders, can cause productivity relatively poor, and influence the productivity ratio effect of product.
Owing to be used for improveing the auxiliary agent that three-layer co-extruded pressure twin shaft extends the paper antistatic behaviour and the sliding property of pearlescent synthetic paper (20), and paper layer (A1) or paper layer (C1) under being not suitable for being added on, so must be added on the thicker foaming layer of thickness (B1), so the auxiliary dosage of paper antistatic behaviour and sliding property is bigger, be unfavorable for reducing cost and effective control quality.
In addition, this three-layer co-extruded pressure twin shaft extends paper layer (A1) or the paper layer (C1) under the pearlescent synthetic paper (20), the brightness of its paper and gloss are vulnerable to the foaminess of foaming layer (B1) and add the influence of inorganic powder, and the intensity between each stacking layer is relatively poor peels off easily; And at present known three-layer co-extruded pressure twin shaft extends the thickness of pearlescent synthetic paper (20), mostly at 30～250 μ m, thinner thickness.
In order to promote the quality of three-layer co-extruded pressure biaxial stretched polypropylene pearly synthetic paper once more, applicant company is developed a kind of five-layer co-squeezing again and is pressed biaxial stretched polypropylene pearly synthetic paper, to promote firm very property, covering property, paper brightness and the printing adaptability quality of original three-layer co-extruded pressure biaxial stretched polypropylene pearly synthetic paper, simultaneously, five-layer co-squeezing is pressed the stay in grade of biaxial stretched polypropylene pearly synthetic paper, helps improving speed of production and reduces cost.
Summary of the invention
The object of the present invention is to provide a kind of five-layer co-squeezing to press twin shaft to extend pearlescent synthetic paper and manufacture method thereof.
Five-layer co-squeezing of the present invention is pressed biaxial stretched polypropylene pearly synthetic paper, it is five stacking layers of structure of 30～300 μ m, by the paper layer or the resin bed (B) of the paper layer of the superiors or resin bed (A), the second layer, be interposed in middle foaming layer (C), the 4th layer paper layer or resin bed (D), and undermost paper layer or resin bed (E) repeatedly put formation jointly, wherein
The paper layer of the described the superiors or resin bed (A) and undermost paper layer or resin bed (E), its composition are respectively polypropylene 96～36 weight %, polyethylene 0～30 weight %, antiplastering aid 2～5 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, light absorber 1～2 weight %, antioxidant 1～2 weight %;
The paper layer or the resin bed (D) of the paper layer of the described second layer or resin bed (B) and the 4th layer, its composition is respectively polypropylene 97～54 weight %, polyethylene 0～15 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, antistatic additive 1～7 weight %, light absorber 1～2 weight %, antioxidant 1～2 weight %;
Described repeatedly putting at middle foaming layer (C), it consists of polypropylene 88～46 weight %, polyethylene 0～15 weight %, calcium carbonate M.B (40～70%) 5～15 weight %, titanium dioxide M.B (30～60%) 5～15 weight % and light absorber 1～2 weight %, antioxidant 1～2 weight %.
Five-layer co-squeezing of the present invention is pressed the manufacture method of biaxial stretched polypropylene pearly synthetic paper, and it presses twin shaft to extend processing procedure through five-layer co-squeezing, and makes the five stacking layer structure of thickness between 30～300 μ m, and this manufacture method may further comprise the steps:
(a), the paper layer of the superiors or resin bed (A) and undermost paper layer or resin bed (E), respectively by 2 single screw pair extruders with funneling air extractor, under 160～280 ℃ of temperature, to containing polypropylene 96～36 weight %, polyethylene 0～30 weight %, antiplastering aid 2～5 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after stirring via the feeding mouth of single screw pair extruder front end is even respectively, enter separately again in single screw pair extruder, through mixing and bleed after, respectively composition is clamp-oned in the ground floor and layer 5 runner of T pattern head;
(b), the paper layer or the resin bed (D) of the paper layer of the second layer or resin bed (B) and the 4th layer, respectively by 2 single screw pair extruders with funneling air extractor, under 160～280 ℃ of temperature, to containing polypropylene 97～54 weight %, polyethylene 0～15 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, antistatic additive 1～7 weight %, light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after stirring via the feeding mouth of single screw pair extruder front end is even respectively, enter separately again in single screw pair extruder, through mixing and bleed after, respectively composition is clamp-oned in the second layer and the 4th laminar flow road of T pattern head;
(c), the 3rd layer foaming layer (C), by a twin-screw master extruder with air extractor, under 160～280 ℃ of temperature, to containing polypropylene 88～46 weight %, polyethylene 0～15 weight %, calcium carbonate M.B (40～70%) 5～20 weight %, titanium dioxide M.B (30～60%) 5～20 weight %, with light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after the even stirring of the feeding mouth of twin-screw master extruder front end, enter twin-screw master extruder again, through mixing and bleed after, composition is clamp-oned in the 3rd laminar flow road of T pattern head;
(d), will again via cooling forming device, be five stacking laminate sheets through five stacking layers of molded works of T pattern coextrusion head at 15～70 ℃ of compacted unders of temperature;
(e), import the longitudinal extension device, under 155～150 ℃ of temperature,, carry out the longitudinal extension of multiplying power 2.5～7 to five stacking laminate sheets described in (d) step;
(f), again import the horizontal expansion device, under 140～200 ℃ of temperature, the five stacking laminate sheets of (e) step are carried out the horizontal expansion of multiplying power 5～15;
(g), through corona treatment plant, the five stacking laminate sheets that extend through the vertical and horizontal twin shaft with the high frequency sided corona treatment of 20～120kw power;
(h), be rolled into 30～300 μ m five-layer co-squeezings with coiling machine and press two-way extension pearlescent synthetic paper finished product,
Wherein, the total MFI of constituent of the total MFI of the constituent 〉=paper layer of paper layer or resin bed (A), paper layer or resin bed (E) or resin bed (B), paper layer or resin bed (D); And the total MFI of constituent of the total MFI 〉=foaming layer of constituent (C) of paper layer or resin bed (B), paper layer or resin bed (D).
As shown in Figure 1, five-layer co-squeezing of the present invention presses twin shaft to extend pearlescent synthetic paper (15), on the rerum natura and on the cost, can break through the restriction that known three-layer co-extruded pressure twin shaft extends pearlescent synthetic paper (20), has following five major advantages:
One, five-layer co-squeezing of the present invention presses twin shaft to extend the foaming layer (C) of pearlescent synthetic paper (15), it is more flexible that its foaminess is adjusted the space, help improving speed of production and stabilizing quality, when producing this five-layer co-squeezing pressure twin shaft extension pearlescent synthetic paper (15), owing to can more on average adjust its each laminated proportion, do not need reduction of speed to reduce frictional heat, so, five-layer co-squeezing presses twin shaft to extend the stay in grade of pearlescent synthetic paper (15), can promote speed of production.
Two, five-layer co-squeezing of the present invention presses twin shaft to extend each stacking layer of pearlescent synthetic paper (15), all can be adjusted to structure with covering property, the requirement of covering property of reason does not improve and influences production efficiency, in the time will improving the covering property quality of five-layer co-squeezing pressure twin shaft extension pearlescent synthetic paper (15), can in each stacking layer, produce in the mode of average interpolation inorganic powder, this can reduce the inorganic powder addition of each stacking layer, except the unlikely production efficiency of products that influences, and can promote the covering property effect that this five-layer co-squeezing is pressed twin shaft extension pearlescent synthetic paper (15).
Three, press twin shaft to extend the auxiliary agent of the paper antistatic behaviour and the sliding property of pearlescent synthetic paper (15) owing to be used for improveing this five-layer co-squeezing, can be adjusted to the paper layer or the resin bed (D) of the paper layer of the second layer that only is added on thinner thickness or resin bed (B) and the 4th layer, so the auxiliary dosage of paper antistatic behaviour and sliding property is relatively saved, except that can reducing cost, and can ensure and control the paper layer of the superiors or the press quality of resin bed (A).
Four, five-layer co-squeezing of the present invention presses twin shaft to extend the paper gloss that pearlescent synthetic paper (15) has high brightness, and the rigidity of product and each interlaminar strength between laminated is preferable, this five-layer co-squeezing presses twin shaft to extend the foaming layer and the shielding layer of pearlescent synthetic paper (15), owing to can be selected in and be interposed in middle foaming layer (C), and the paper layer or the resin bed (B) of the paper layer of the superiors or resin bed (A) and the second layer, or the 4th layer paper layer or resin bed (D) and undermost paper layer or resin bed (E), can be the resin bed structure, make five-layer co-squeezing press twin shaft to extend the paper gloss that pearlescent synthetic paper (15) has high brightness, and the intensity between the rigidity of product and each the stacking layer, it is excellent more that all more three-layer co-extruded pressure twin shaft extends pearlescent synthetic paper (20).
Five, five-layer co-squeezing of the present invention presses twin shaft extension pearlescent synthetic paper (15) can improve production thickness, as shown in the table, at present known three-layer co-extruded pressure twin shaft extends the thickness of pearlescent synthetic paper (20), mostly at 30～250 μ m, and the present invention's five-layer co-squeezing presses twin shaft to extend the thickness of pearlescent synthetic paper (15), can reach 30～300 μ m, so five-layer co-squeezing presses twin shaft to extend the thickness that pearlescent synthetic paper (15) can promote product.
| Three layers of extrusion (30～250 μ m) altogether | Five layers of extrusion (30～300 μ m) altogether | |||||||
| A1 | B1 | C1 | A | B | C | D | E | |
| Thickness | 1～15 | 28～215 | 1～15 | 1～15 | 2～15 | 24～215 | 2～15 | 1～15 |
And, when producing this five-layer co-squeezing pressure twin shaft extension pearlescent synthetic paper (15), the prescription of each stacking layer is formed, as resin, inorganic powder, the formed MFI of each ratio of additive, flowability in the five-layer co-squeezing pressing die head, must be smooth and easy can be sluggish, must avoid certain stacking layer to give as security altogether smoothly and to go out, cause the co-extrusion thing smoothly cooling forming be the smooth plate of perfection.So the prescription of each stacking layer is formed, be that applicant company invention five-layer co-squeezing presses twin shaft to extend the key technology of pearlescent synthetic paper (15).
Constantly grind examination through applicant company, each stacking layer formula that five-layer co-squeezing of the present invention presses twin shaft to extend pearlescent synthetic paper (15) is formed, and each layer MFI relation is described as follows:
One, the paper layer of the paper layer of the superiors or resin bed (A), the second layer or resin bed (B), be interposed in middle foaming layer (C), the 4th layer paper layer or resin bed (D), and repeatedly put at undermost paper layer or resin bed (E), employed raw material has:
1, resin raw material: as polypropylene, polyethylene, hydrocarbon fat.
2, the M.B of inorganic powder and additive (compound grain).Wherein one or more of the colony that can be selected from calcium carbonate (heavy or lightweight), titanium dioxide (A-Type or R-Type), diatomite, carclazyte, calcium oxide, silica and barium sulfate, earlier through after the surface treatment, again wherein to make the M.B that particle diameter is 0.05～15 μ m after one or two or more kinds fusion.
Two, the total MFI of the constituent of paper layer or resin bed (A), paper layer or resin bed (B), foaming layer (C), paper layer or resin bed (D) and paper layer or resin bed (E) closes and is:
The total MFI of the constituent 〉=paper layer of paper layer or resin bed (A), paper layer or resin bed (E) or the total MFI of constituent of resin bed (B), paper layer or resin bed (D); And the total MFI of constituent of the total MFI 〉=foaming layer of constituent (C) of paper layer or resin bed (B), paper layer or resin bed (D);
Especially, paper layer or resin bed (A) paper layer or resin bed (E) 〉=paper layer or resin bed (B) paper layer or resin bed (D) 〉=foaming layer (C)
And scope is: 1.5～12/1～15/0.5～7/1～15/1.5～12
Three, the MFI scope of each raw material:
| Raw material | The MFI scope | Raw material | The MFI scope |
| Polypropylene | 1～12 | Polyethylene | 0.05～6 |
| Silica M.B | 1～15 | Antistatic additive M.B | 1～15 |
| Calcium carbonate M.B | 1～15 | Antiplastering aid M.B | 1～6 |
| Talcum powder M.B | 1～15 | Light absorber M.B | 0.5～7 |
| Barium sulfate M.B | 1～15 | Antioxidant M.B | 0.5～15 |
| Diatomite M.B | 1～15 |
Wherein, the M.B of silica, calcium carbonate, talcum powder, barium sulfate, diatomite, antistatic additive, antiplastering aid, antioxidant, light absorber forms, and main available polypropylene and polyethylene are vector resin.And inorganic powders such as silica, calcium carbonate, talcum powder, barium sulfate, diatomite, it is between 0.05～15 μ m that its particle diameter is selected scope for use, it makes compound grain concentration range can be between 15～75%.
Four, five-layer co-squeezing of the present invention presses twin shaft to extend each stacking layer formula composition of pearlescent synthetic paper (15), wherein, repeatedly put paper layer or resin bed (A) and undermost paper layer or resin bed (E) in the superiors, its composition is respectively polypropylene 96～36 weight %, polyethylene 0～30 weight %, antiplastering aid 2～5 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, light absorber 1～2 weight %, antioxidant 1～2 weight %; And repeatedly put paper layer or resin bed (D) the paper layer of the second layer or resin bed (B) and the 4th layer, its composition is respectively polypropylene 97～54 weight %, polyethylene 0～15 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, antistatic additive 1～7 weight %, light absorber 1～2 weight %, antioxidant 1～2 weight %; And repeatedly put at middle foaming layer (C), it consists of polypropylene 88～46 weight %, polyethylene 0～15 weight %, calcium carbonate M.B (40～70%) 5～15 weight %, titanium dioxide M.B (30～60%) 5～15 weight % and light absorber 1～2 weight %, antioxidant 1～2 weight %.
As Fig. 1 and shown in Figure 3, five-layer co-squeezing of the present invention presses twin shaft to extend the manufacture method of pearlescent synthetic paper (15), be to press twin shaft to extend processing procedure through five-layer co-squeezing, and make the five stacking layer works of thickness between 30～300 μ m, it can be directly as outside the printing purposes, and the coating material that also can be used as the application type product of high additive value uses.
Wherein, five-layer co-squeezing of the present invention presses twin shaft to extend the affiliated foaming layer (C) of pearlescent synthetic paper (15), by a twin-screw master extruder (3) with air extractor, under 160～280 ℃ of temperature, to containing polypropylene 88～46 weight %, polyethylene 0～15 weight %, calcium carbonate M.B (40～70%) 5～20 weight %, titanium dioxide M.B (30～60%) 5～20 weight %, with light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after the even stirring of the feeding mouth of twin-screw master extruder (3) front end, enter again in the twin-screw master extruder (3), through mixing and bleed after, composition is clamp-oned in the 3rd laminar flow road of T pattern head.
Five-layer co-squeezing of the present invention presses twin shaft to extend pearlescent synthetic paper (15) affiliated paper layer or resin bed (A) and paper layer or resin bed (E), respectively by 2 single screw pair extruders (1) with funneling air extractor, (5), under 160～280 ℃ of temperature, to containing polypropylene 96～36 weight %, polyethylene 0～30 weight %, antiplastering aid 2～5 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, respectively via single screw pair extruder (1), (5) after the feeding mouth of front end evenly stirs, enter single screw pair extruder (1) more separately, (5) in, through mixing and bleed after, respectively composition is clamp-oned in the ground floor and layer 5 runner of T pattern head.
And five-layer co-squeezing of the present invention presses twin shaft to extend pearlescent synthetic paper (15) affiliated paper layer or resin bed (B) and paper layer or resin bed (D), respectively by 2 single screw pair extruders (2) with funneling air extractor, (4), under 160～280 ℃ of temperature, to containing polypropylene 97～54 weight %, polyethylene 0～15 weight %, titanium dioxide M.B (30～60%) 0～15 weight %, calcium carbonate M.B (40～70%) 0～15 weight %, antistatic additive 1～7 weight %, light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, respectively via single screw pair extruder (2), (4) after the feeding mouth of front end evenly stirs, enter single screw pair extruder (2) more separately, (4) in, through mixing and bleed after, respectively composition is clamp-oned in the second layer and the 4th laminar flow road of T pattern head.
Through five stacking layers of molded works of T pattern coextrusion head, again via cooling forming device (6), become plate at 15～70 ℃ of compacted unders of temperature, this plate is again through longitudinal extension device (7), under 155～150 ℃ of temperature, after carrying out multiplying power and be 2.5～7 longitudinal extension, continuation is through horizontal expansion device (8), under 140～200 ℃ of the temperature, carrying out multiplying power is 5～15 horizontal expansions, then, through corona treatment plant (9),, improve pearlescent synthetic paper and have uniform surface tension with the five stacking laminate sheets that the high frequency sided corona treatment of 20～120kw power is extended through the vertical and horizontal twin shaft, press two-way extension pearlescent synthetic paper (15) finished product with formation 30～300 μ m five-layer co-squeezings, be rolled into 30～300 μ m five-layer co-squeezings through coiling machine (10) again and press two-way extension pearlescent synthetic paper (15) paper roll.
Description of drawings
Fig. 1 presses the laminated structural map of biaxial stretched polypropylene pearly synthetic paper for five-layer co-squeezing of the present invention;
Fig. 2 is the laminated structural map of known three-layer co-extruded pressure biaxial stretched polypropylene pearly synthetic paper;
Fig. 3 presses the manufacturing flow chart of biaxial stretched polypropylene pearly synthetic paper for five-layer co-squeezing of the present invention.
Description of reference numerals:
1 single screw pair extruder 2 single screw pair extruders
3 twin-screw master extruders, 4 single screw pair extruders
5 single screw pair extruder 6 cooling forming devices
7 longitudinal extension devices, 8 horizontal expansion devices
9 corona treatment plants, 10 coiling machines
15 five-layer co-squeezings are pressed two-way extension pearlescent synthetic paper
The two-way extension pearlescent synthetic paper of 20 three-layer co-extruded pressures
A1 paper layer or resin bed B1 paper layer or resin bed
C1 foaming layer A paper layer or resin bed
B paper layer or resin bed C foaming layer
D paper layer or resin bed E paper layer or resin bed
The specific embodiment
Below be that five-layer co-squeezing of the present invention presses twin shaft to extend the non-limiting specific embodiment of pearlescent synthetic paper:
Embodiment 1
The good net of single face paper mask, 170 μ m five-layer co-squeezings flat, protruding, intaglio printing press twin shaft to extend pearlescent synthetic paper (15).
Wherein, the superiors are paper layer (A), and it consists of: polypropylene (MFI:6) 48 weight %, polyethylene (MFI:0.05) 30 weight %, titanium dioxide M.B (40%) 15 weight %, calcium carbonate M.B (60%) 15 weight %, antiplastering aid 2 weight % and light absorber 1 weight %, antioxidant 1 weight %;
The second layer is paper layer (B), and it consists of polypropylene (MFI:3) 71 weight %, calcium carbonate M.B (60%) 15 weight %, titanium dioxide M.B (40%) 15 weight %, antistatic additive 7 weight %, antioxidant 1 weight %, light absorber 1 weight %;
The 3rd layer is foaming layer (C), and it consists of polypropylene (MFI:2.4) 78 weight %, calcium carbonate M.B (60%) 15 weight %, titanium dioxide M.B (40%) 5 weight %, antioxidant 1 weight %, light absorber 1 weight %;
The 4th layer is paper layer (D), and it consists of polypropylene (MFI:3) 71 weight %, calcium carbonate M.B (60%) 15 weight %, titanium dioxide M.B (40%) 15 weight %, antistatic additive 7 weight %, antioxidant 1 weight %, light absorber 1 weight %;
Layer 5 is paper layer (E), and it consists of polypropylene (MFI:6) 95 weight %, antiplastering aid 3 weight %, antioxidant 1 weight %, light absorber 1 weight %.
170 made μ m five-layer co-squeezings of present embodiment press twin shaft to extend pearlescent synthetic paper (15), and its physical property is as shown in table 1:
Table 1
| The rerum natura project | Unit | Present embodiment (170 μ m single face paper pearlescent synthetic paper) | Method of testing |
| Proportion | -- | 0.65 | ASTM D 1248 |
| Basic weight | g/m 2 | 115 | JIS P-8124 |
| Opacity | ％ | 95 | TAPPI T-425 |
| Glossiness | ％ | 25/117 | TAPPI T-480 |
| Roughness | ％ | 1.5/0.8 | TAPPI T-555 |
| Whiteness | ％ | 96 | TAPPI T-525 |
| Surface impedance | Ω | 10 10～10 12 | EN 45014 |
Press twin shaft to extend pearlescent synthetic paper (15) by 170 made μ m five-layer co-squeezings of present embodiment, have the following advantages:
When 1, five-layer co-squeezing presses twin shaft to extend pearlescent synthetic paper (15) for reduction proportion, there are four stacking layers of structure can be set at foaming layer, and known three-layer co-extruded pressure twin shaft extends pearlescent synthetic paper (20), only there are two stacking layers of structure can be set at foaming layer, so, five-layer co-squeezing presses twin shaft to extend pearlescent synthetic paper (15) can reduce the shortcoming that calcium carbonate too concentrates on certain one deck foaming layer, and can promote production efficiency whereby, reduces cost.
2, five-layer co-squeezing presses twin shaft to extend the covering property structure of pearlescent synthetic paper (15), can be set at four layers, and known three-layer co-extruded pressure twin shaft extends pearlescent synthetic paper (20), only can be set at two layers, so, five-layer co-squeezing presses twin shaft to extend pearlescent synthetic paper (15) can reduce the too concentrated shortcoming that is added on certain covering property of one deck structure of titanium dioxide, and can improve speed of production and efficient whereby.
3, additive such as antistatic additive only need be added on thin second layer paper layer or resin bed (B), or the 4th layer of paper layer or resin bed (D), known three-layer co-extruded pressure twin shaft extends pearlescent synthetic paper (20) then need be added on thicker foaming layer (B1), so, can reduce the materials cost of additive.
Embodiment 2
The good net of single two-sided bright mask, 90 μ m five-layer co-squeezings flat, protruding, intaglio printing press twin shaft to extend pearlescent synthetic paper (15).More known three-decker has the advantages such as interlaminar strength that just very property is good, brightness is good and good.
Wherein, the paper layer (A) of the superiors and undermost paper layer (E), its composition is respectively: with polypropylene (MFI:6) 94 weight %, antioxidant 2 weight %, antiplastering aid 2 weight % and light absorber 2 weight %;
The paper layer (B) of the second layer and the 4th layer paper layer (D), its composition is respectively: polypropylene (MFI:6) 93 weight %, antistatic additive 5 weight %, antioxidant 1 weight %, light absorber 1 weight %;
And the 3rd layer foaming layer , it consists of: polypropylene (MFI:3) 68 weight %, calcium carbonate M.B (60%) 15 weight %, titanium dioxide M.B (40%) 15 weight %, antioxidant 1 weight %, light absorber 1 weight %.
90 made μ m five-layer co-squeezings of present embodiment press twin shaft to extend pearlescent synthetic paper (15), and its physical property is as shown in table 2:
Table 2
| The rerum natura project | Unit | Present embodiment (two-sided bright the pearlescent synthetic paper of 90 μ m) | Method of testing |
| Proportion | -- | 0.85 | ASTM D 1248 |
| Basic weight | g/m2 | 76 | JIS P-8124 |
| Opacity | ％ | 82 | TAPPI T-425 |
| Glossiness | ％ | 125/125 | TAPPI T-480 |
| Roughness | ％ | 0.4 | TAPPI T-555 |
| Whiteness | ％ | 88 | TAPPI T-525 |
| Surface impedance | Ω | 10 12～10 13 | EN 45014 |
Press twin shaft to extend pearlescent synthetic paper (15) by 90 made μ m five-layer co-squeezings of present embodiment, the known three-layer co-extruded pressure twin shaft identical with thickness, covering property and proportion extends pearlescent synthetic paper (20) compares, and it has preferable firm deflection, paper glossiness and interlaminar strength.
Claims (4)
1, a kind of five-layer co-squeezing is pressed biaxial stretched polypropylene pearly synthetic paper, it is five stacking layers of structure of 30～300 μ m, by the paper layer or the resin bed (B) of the paper layer of the superiors or resin bed (A), the second layer, be interposed in middle foaming layer (C), the 4th layer paper layer or resin bed (D), and undermost paper layer or resin bed (E) repeatedly put formation jointly, it is characterized in that
The MFI of the paper layer of the described the superiors or resin bed (A) and undermost paper layer or resin bed (E) is 1.5～12, its composition is respectively polypropylene 96～36 weight %, polyethylene 0～30 weight %, antiplastering aid 2～5 weight %, contain 30～60% titanium dioxide compound grain 0～15 weight %, contain compound grain 0～15 weight %, light absorber 1～2 weight %, antioxidant 1～2 weight % of 40～70% calcium carbonate;
The paper layer of the described second layer or resin bed (B) and the 4th layer paper layer or the MFI of resin bed (D) are 1～15, its composition is respectively polypropylene 97～54 weight %, polyethylene 0～15 weight %, contain 30～60% titanium dioxide compound grain 0～15 weight %, contain compound grain 0～15 weight %, antistatic additive 1～7 weight %, light absorber 1～2 weight %, antioxidant 1～2 weight % of 40～70% calcium carbonate;
It is described that repeatedly to put at the MFI of middle foaming layer (C) be 0.5～7, it consists of polypropylene 88～46 weight %, polyethylene 0～15 weight %, contain 40～70% calcium carbonate compound grain 5～15 weight %, contain compound grain 5～15 weight % of 30～60% titanium dioxide, with light absorber 1～2 weight %, antioxidant 1～2 weight %
Wherein, the total MFI of constituent of the total MFI of the constituent 〉=paper layer of paper layer or resin bed (A), paper layer or resin bed (E) or resin bed (B), paper layer or resin bed (D); And the total MFI of constituent of the total MFI 〉=foaming layer of constituent (C) of paper layer or resin bed (B), paper layer or resin bed (D).
2, five-layer co-squeezing as claimed in claim 1 is pressed biaxial stretched polypropylene pearly synthetic paper, and it can be five stacking layers of structure of 90 μ m, it is characterized in that,
The paper layer (A) of the described the superiors and undermost paper layer (E), its composition are respectively polypropylene 94 weight %, and MFI is 6, antioxidant 2 weight %, antiplastering aid 2 weight % and light absorber 2 weight %;
The paper layer (B) of the described second layer and the 4th layer paper layer (D), its composition is respectively polypropylene 93 weight %, and MFI is 6, antistatic additive 5 weight %, antioxidant 1 weight %, light absorber 1 weight %;
Described the 3rd layer foaming layer (C), it consists of polypropylene 68 weight %, MFI is 3, contain 60% calcium carbonate compound grain 15 weight %, contain compound grain 15 weight %, antioxidant 1 weight %, the light absorber 1 weight % of 40% titanium dioxide.
3, a kind of 30～300 μ m five-layer co-squeezings are pressed the manufacture method of biaxial stretched polypropylene pearly synthetic paper, and it is pressed twin shaft for the process five-layer co-squeezing and extends processing procedure, and makes the five stacking layer structure of thickness between 30～300 μ m, and this manufacture method may further comprise the steps:
(a), the MFI of the paper layer of the superiors or resin bed (A) and undermost paper layer or resin bed (E) is 1.5～12, respectively by 2 single screw pair extruders with funneling air extractor, under 160～280 ℃ of temperature, to containing polypropylene 96～36 weight %, polyethylene 0～30 weight %, antiplastering aid 2～5 weight %, compound grain 0～15 weight % that contains 30～60% titanium dioxide, compound grain 0～15 weight % that contains 40～70% calcium carbonate, light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after stirring via the feeding mouth of single screw pair extruder front end is even respectively, enter separately again in single screw pair extruder, through mixing and bleed after, respectively composition is clamp-oned in the ground floor and layer 5 runner of T pattern head;
(b), the paper layer of the second layer or resin bed (B) and the 4th layer paper layer or the MFI of resin bed (D) are 1～15, respectively by 2 single screw pair extruders with funneling air extractor, under 160～280 ℃ of temperature, to containing polypropylene 97～54 weight %, polyethylene 0～15 weight %, compound grain 0～15 weight % that contains 30～60% titanium dioxide, compound grain 0～15 weight % that contains 40～70% calcium carbonate, antistatic additive 1～7 weight %, light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after stirring via the feeding mouth of single screw pair extruder front end is even respectively, enter separately again in single screw pair extruder, through mixing and bleed after, respectively composition is clamp-oned in the second layer and the 4th laminar flow road of T pattern head;
(c), the MFI of the 3rd layer foaming layer (C) is 0.5～7, by a twin-screw master extruder with air extractor, under 160～280 ℃ of temperature, to containing polypropylene 88～46 weight %, polyethylene 0～15 weight %, compound grain 5～20 weight % that contain 40～70% calcium carbonate, compound grain 5～20 weight % that contain 30～60% titanium dioxide, with light absorber 1～2 weight %, the composition of antioxidant 1～2 weight %, after the even stirring of the feeding mouth of twin-screw master extruder front end, enter twin-screw master extruder again, through mixing and bleed after, composition is clamp-oned in the 3rd laminar flow road of T pattern head;
(d), will again via cooling forming device, be five stacking laminate sheets through five stacking layers of molded works of T pattern coextrusion head at 15～70 ℃ of compacted unders of temperature;
(e), import the longitudinal extension device, under 155～150 ℃ of temperature,, carry out the longitudinal extension of multiplying power 2.5～7 to five stacking laminate sheets described in (d) step;
(f), again import the horizontal expansion device, under 140～200 ℃ of temperature, the five stacking laminate sheets of (e) step are carried out the horizontal expansion of multiplying power 5～15;
(g), through corona treatment plant, the five stacking laminate sheets that extend through the vertical and horizontal twin shaft with the high frequency sided corona treatment of 20～120kw power;
(h), be rolled into 30～300 μ m five-layer co-squeezings with coiling machine and press two-way extension pearlescent synthetic paper finished product,
Wherein, the total MFI of constituent of the total MFI of the constituent 〉=paper layer of paper layer or resin bed (A), paper layer or resin bed (E) or resin bed (B), paper layer or resin bed (D); And the total MFI of constituent of the total MFI 〉=foaming layer of constituent (C) of paper layer or resin bed (B), paper layer or resin bed (D).
4, five-layer co-squeezing as claimed in claim 3 is pressed the manufacture method of biaxial stretched polypropylene pearly synthetic paper, it is characterized in that, the compound grain that contains titanium dioxide or calcium carbonate, with polypropylene and polyethylene is vector resin, makes the compound grain that particle diameter is 0.05～15 μ m with wherein one or more fusion that are selected from the colony that is made up of titanium dioxide, diatomite, carclazyte, calcium oxide, silica and the barium sulfate of calcium carbonate, A type or the R type of heavy or lightweight.
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| CN 03156314 CN1231348C (en) | 2003-09-01 | 2003-09-01 | Five-layer coextrusion biaxial extension polypropylene pearly-lustre synthetic paper and manufacturing method thereof |
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| CN 03156314 CN1231348C (en) | 2003-09-01 | 2003-09-01 | Five-layer coextrusion biaxial extension polypropylene pearly-lustre synthetic paper and manufacturing method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100446970C (en) * | 2005-11-28 | 2008-12-31 | 申达集团有限公司 | Five layer co-extruding biaxial stretched synthetic PP paper and its prepn process |
| CN106739360A (en) * | 2017-01-05 | 2017-05-31 | 齐庆德 | Multi-layer co-extruded Biaxially-oriented polyethylene synthetic paper and its manufacture method |
| CN107031153B (en) * | 2017-03-30 | 2019-08-13 | 齐庆德 | A kind of preparation method of biodegradable multi-layer co-extruded material |
| CN109291588A (en) * | 2018-08-30 | 2019-02-01 | 无锡环宇包装材料股份有限公司 | A kind of dedicated copperplate synthetic paper of thermal transfer and preparation method thereof |
| TWI677435B (en) * | 2018-10-19 | 2019-11-21 | 南亞塑膠工業股份有限公司 | Matte synthetic paper |
| TW202140269A (en) * | 2020-04-24 | 2021-11-01 | 南亞塑膠工業股份有限公司 | Visible light shielding structure |
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