CN1008953B - Jacket for floppy disk - Google Patents
Jacket for floppy diskInfo
- Publication number
- CN1008953B CN1008953B CN 85103654 CN85103654A CN1008953B CN 1008953 B CN1008953 B CN 1008953B CN 85103654 CN85103654 CN 85103654 CN 85103654 A CN85103654 A CN 85103654A CN 1008953 B CN1008953 B CN 1008953B
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- China
- Prior art keywords
- styrene
- resin
- base
- protection overcoat
- layer
- Prior art date
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a protective outer sleeve for a disc, which is composed of an outer layer and an inner layer, wherein the outer layer is made of resin compositions which use electrostatic resistance styrene as a base; the inner layer is a nonwoven fabric layer.
Description
The present invention relates to wherein be surrounded by the protection overcoat of disk.
Disk protect overcoat commonly used is by non-woven fabric and mainly cut the thin slice of forming with the rigid polyvinyl chloride of folding operation by process.Because it is mainly by the Polyvinylchloride preparation, so heat distortion temperature is up to 60 to 70 ℃.Therefore, if non-woven fabric lamination at high temperature, thin slice will be out of shape or the decorative pattern of non-woven fabric is transferred on the opposite surfaces with the lamination surface of contact, thereby reduces commercial value widely.In addition, the loss in the lamination step is significantly, because the spendable temperature range of non-woven fabric lamination is very narrow.
In addition, in heat lamination or folding step, brought environmental pollution problems by heating the poison gas that is produced.Except that above-mentioned shortcoming, because disk is to use under various condition, so more and more need to have the disk of resistance to elevated temperatures.
Moreover, because the thermal stability problems of Polyvinylchloride makes the multilayer material with slim painted resin bed and light aquiclude that Corvic is made by a pressing steps.Therefore, can not produce the disk protect overcoat of making by Corvic with dyed layer.
Fundamental purpose of the present invention provides a kind of by antistatic styrene is carried out the disk protect overcoat that lamination has antistatic property and improved heat-resisting character for the resin and the non-woven fabric of base.
Another object of the present invention provides a kind of disk protect overcoat that has improved commercial value, and wherein the decorative pattern of non-woven fabric does not shift in using the step that non-woven fabric carries out heat lamination.
Another object of the present invention provides the disk protect overcoat of a kind of made of a kind of usefulness, and this material can be processed in the wideer scope of the temperature range of hard polyvinylchloride resin in temperature range, thereby has improved the efficient of laminating operation.
A further object of the invention provides a kind of can the manufacturing and does not produce the disk protect overcoat of toxic gas in heat lamination and hot folding step.
A further object of the invention provides the outer field disk protect overcoat that disk has different colours, discerns easily so that carry out the branch time-like at the disk of the type that will be used for various purposes, user or machine.
Above-mentioned purpose of the present invention and other purpose will come into plain view to explanation of the present invention by following.
According to disk protect overcoat provided by the invention, comprise skin of making by the antistatic styrene resin combination and the non-woven fabric internal layer that is laminated to this outer field inner face.
Hereinafter will do explanation in more detail to the present invention.
According to the protection overcoat that is used for disk provided by the present invention, comprise by antistatic styrene being the resin combination skin of making and the non-woven fabric internal layer that is laminated to this outer field inner face of base.This skin can be that antistatic styrene is the monolithic layer of the resin of base; Comprise that antistatic styrene is the biplate layer of the insulation course of the resin sheet of base and the resin sheet that another styrene is base; Comprise that perhaps being clipped in two antistatic styrenes is three lamellas of the insulation styrene in the middle of the resin sheet of base for the intermediate of base.Biplate layer and three lamellas can be produced by a step co-extrusion technological process, perhaps produce corresponding lamella and adhesion-molded separately.The co-extrusion technological process can be used in combination with the technological process of mentioning later.
Available styrene in the present invention comprises the high impact strength of styrene resin for the resin of base, styrene resin commonly used and 20%(weight at least) the potpourri of high impact resin, vinyl cyanide/styrene/butadiene copolymers, methacrylonitrile/styrene/butadiene copolymers, styrene/butadiene block copolymer, vinyl cyanide/acrylic acid (class) rubber/styrene multipolymer, vinyl cyanide/EP rubbers/styrol copolymer, vinyl cyanide/Chlorosulphonated ethylene/styrol copolymer, vinyl cyanide/α-Jia Jibenyixi/butadiene copolymer, and the potpourri that mixes by them.Preferably use vinyl cyanide/styrene/butadiene copolymers or vinyl cyanide/α-Jia Jibenyixi/butadiene copolymer, these can be used to prepare resistant to elevated temperatures product.
Antistatic styrene can prepare by antistatic agent being added in the resin of styrene for base for the resin combination of base, and perhaps the antistatic styrene resin bed can prepare by be coated with antistatic agent on this layer.For this reason, can use nonionic and anionic surfactant, best surfactant is, N for example, two (2-hydroxyethyl) the fat amine of N-, the fatty acid ester of polyoxy alkene lauryl amine and polyoxyethylene lauryl amine.The amount of these antistatic agent that add is 0.1～7 part of weight, and preferably 0.5～5 part of weight weight that is the resin of base with employed styrene is 100 to calculate.If the weight of the antistatic agent that adds is less than 0.1 part of weight.The antistatic effect of resulting resin combination does not reach satisfied level, so that the protection that dust can be adsorbed on production puts outward.On the contrary, if the sum of the antistatic agent that adds surpasses 7 parts of weight, then resulting resin combination has super lubricant effect, thereby causes skidding in extrusion step or antistatic agent that this is excessive can be seeped on the outer field surface.When antistatic agent being coated in outer going up, to press solid and calculate, the thickness of coating should be limited in 0.001～0.1 gram/rice
2, and preferably at 0.005～0.05 gram/rice
2Scope in.If coating is thinner than foregoing thickness range, then can not get satisfied antistatic effect, and if the thickness of coating greater than 0.1 gram/rice
2, then resulting skin becomes harmful thick.
In addition, antistatic styrene is that the resin combination of base can pass through conductive carbon black, S.C.F.(Super Conductive Furnace for example), the trade name of the product that obtains by Lion-AKZO company limited of Ketjen Black EC(E.C.F.(Electric Conductive Furnace)) or acetylene black add in the resin of styrene for base and prepare; Or also can for example prepare in copper, aluminium, iron, nickel or the resin of stainless steel adding styrene by conducting metal for base.Be preferably and in the styrene of 100 parts of weight resin, add 3～35 parts of weight for base, and the carbon black of 5～20 parts of weight preferably.Be preferably and in the styrene of 100 parts of weight, add 2～25 parts of weight, and the conducting metal of 5～20 parts of weight preferably.Can use the antistatic agent conductive carbon black more than 2 kinds or 2 kinds and/or the potpourri of conducting metal.When using multi-sheet structure outer, can add insulating trip, and can be with insulation carbon black, for example oven process carbon black or groove carbon black, be used for protecting in the resin binder of adding styrene for base, its addition is 0.1 to 10 part by this resin calculating of 100 parts of weight.Compare with monolithic layer, multi-disc layer structure can provide the multiple layer in jail.
In the present invention, the non-woven fabric internal layer can be made by polyester, viscose glue or aromatic polyamide fiber or aminanthine.Outer and internal layer can be by the incompatible adhesion of hot melt under 160 ℃～240 ℃.
According to the present invention, the protection overcoat of disk, the middle layer that can be included and expand between the skin, outer and middle layer can be contained colorant respectively.Because such structure should be above 1% through the total light transmittance in outer and middle layer.If transmittance surpasses 1%, make disk have the possibility that to locate.The advantage of this structure is to produce the protection overcoat with different colours so that classify according to the concrete application of the disk in the protection overcoat, all kinds of installations that the user maybe need insert this disk easily.Preferably colorant except that black, as red, yellow, salmon pink or blue colorant, can be used in the skin.Tone can be regulated by the identical colorant of use in outer and middle layer, to change the color density of each layer.The comparable consumption that is used for skin of the consumption of the colorant in the middle layer hangs down so that the middle layer with higher mechanical strength to be provided.In addition, the colorant that is present in the skin can be different from the color that is present in the colorant in the middle layer, for example, thereby has to a large extent reduced transmittance for black colorant for cyan coloring agent in the middle layer in skin.
Any dyestuff, organic pigment and inorganic pigment all can be used as colorant, the addition of colorant is not strict, as long as when obviously not having influence on the character of resin, as much as possible transmittance is remained on be no more than 1% just passable.
The antistatic styrene that contains any or multiple colorant is that the skin that the resin combination of base is made can be a single chip architecture, perhaps can be biplate structure (is the resin combination sheet of base for basic resin combination sheet and the insulation styrene that contains colorant comprising antistatic styrene).By a kind of biplate middle layer being provided, making and outer close a slice middle layer is contained white color agents or contained the colorant same with skin, but the colorant consumption is different from the amount that contains in the skin, just can form product attractive in appearance, the colorant in the middle layer does not play opposite influence to it.If desired, the middle layer can be three or the structure of multi-disc more.By co-extrusion, lamination or combination, can produce the structural sheet that contains biplate or multi-disc.
In another embodiment of the present invention, it is the adhesion layer that the potpourri of the resin of base is made that a kind of adhesion layer of being made by ethylenic copolymer or ethylenic copolymer and styrene can be provided between ectonexine.The resin combination that is used for adhesion layer should can both adhere to non-woven fabric layer and skin, and therefore, what preferentially use is ethylenic copolymer, for example the ethylenic copolymer of ethylene copolymer or modification.It can be that basic resin binder mixes and uses with being used for outer field styrene that these resins can use separately also.It is that those are selected from ethene and vinyl acetate that available ethene belongs to multipolymer, the polymkeric substance of butene-1 etc.; Available modification ethylenic copolymer is the multipolymer with the alkene-2 of unsaturated carboxylic acid or its anhydride modification; Most preferred ethene improved/acetate ethylene copolymer.When such ethylenic copolymer or modification ethylenic copolymer and matrix styrene are that the mixed with resin of base is when using, styrene is that the content of the resin of base had better not surpass 90%(weight), if content surpasses 90%(weight) time, just be reduced to a unsafty level in adhesion strength with the lamination composition surface of non-woven fabric.
The skin of laminated plastic of the present invention and middle layer can add inorganic filler as required, ultraviolet light absorber and/or other adjuvant.Skin can print.
According to the present invention; the composite wafer that is used to make the disk protect overcoat has normally the thickness at 300～600 micrometer ranges; preferred outer layer thickness scope is 150～280 microns; skin adds the gross thickness in middle layer preferably between 150～350 microns, to produce the protection overcoat of tool sufficient intensity.
The present invention will explain by the narration specific embodiment.
In the following example, the material that can buy on the market that the numeral in the bracket is represented respectively to list later.
Embodiment 1
Use the extruder of 40m/m, thickness is 240 microns single sheet usable resins composition extrusion modling, and this resin combination contains the antistatic agent (5) of (1) 5 part of weight of ABS resin of 100 parts of weight and the insulation carbon black (8) of 3 parts of weight.Change then this single sheet and polyester non-woven fabric are carried out the temperature of the step of lamination, and measure temperature conditions simultaneously, to produce composite wafer through modular heat-sealing machine.Temperature conditions and the results are shown in Table 1.Every composite wafer is cut into the piece of 170 * 300m/m; with this thin slice and non-woven fabric 200 ℃ of laminated; then under 180 ℃, be folded to form 5 inches square disk protect overcoats, under 220 ℃, carry out the heat seal fringe region then to produce the protection overcoat.
The protection overcoat of being produced has good appearance and does not have transfer and an any distortion of non-woven fabric decorative pattern, is carrying out in the step of lamination with non-woven fabric and is not all having niff during the thermal treatment in folding step simultaneously.The percentage length growth rate of heating has the given analog value of comparison example 1 and is higher than about 20 ℃ mutually on dutyly in temperature, and this percentage length growth rate shows that the present invention has improved the heat resistance of protection overcoat.
Embodiment 2
Through the co-extrusion technological process, by extrusion molding is biplate layer thin slice, it comprising thickness 25 microns the first resin lamella, this lamella is by the high impact strength of styrene resin (4) that comprises 100 parts of weight, the composition of anti-quiet dose (6) of 3 parts of weight and the insulation carbon black of 3 parts of weight is made, and thickness is 200 microns the second resin lamella, and this lamella is to be made by the composition of the insulation carbon black of the high impact strength of styrene resin (4) that comprises 100 parts of weight and 3 parts of weight.Be similar to example 1, change is carried out the temperature of the step of lamination with this biplate layer thin slice and polyester non-woven fabric, and measures the temperature conditions through modular heat-sealing machine simultaneously, to produce composite wafer.Temperature conditions and the results are shown in Table 1.This composite wafer material is folded under 170 ℃, and then under 160 ℃, carry out heat seal, to produce the protection overcoat.
The protection overcoat of being produced has good surface appearance and does not have transfer and an any distortion of non-woven fabric decorative pattern, is carrying out in the step of lamination with yarn fabric and is not all smelling niff during the thermal treatment in folding step simultaneously.The heat resistance comparison of product is better than the product of embodiment 1.
Embodiment 3
Through the co-extrusion technological process, by extrusion molding is three layer films, the core resin lamella that comprises 180 micron thickness, this lamella is to be made by the composition of the insulation carbon black (8) of the ABS resin that comprises 100 parts of weight (2) and 2 parts of weight, and two every thickness is 20 microns overcoat lamella, this two lamella is by the ABS resin that comprises 100 parts of weight (3), and the composition of the insulation carbon black (8) of 10 parts of weight and the antistatic agent of 3 parts of weight is made.
Similar embodiment 1, change is carried out the temperature of the step of lamination with this three lamellas thin slice and non-woven fabric, and measures the temperature conditions through modular heat-sealing machine simultaneously, to produce composite wafer.Temperature conditions is with the results are shown in Table 1.
This composite wafer material is being folded under 210 ℃ and then carrying out heat seal under 230 ℃, to produce overcoat.
The outer tackling good surface appearance of the protection of being produced and do not have transfer and any distortion of non-woven fabric decorative pattern is not all smelt niff simultaneously when carrying out in the step of lamination with non-woven fabric and heat-treating in folding step.The percentage length growth rate of heating has the given analog value of comparative example 1 mutually on duty when temperature is higher than about 30 ℃, and the percentage length growth rate of this heating shows that the present invention has improved the heat resistance of overcoat.
The comparative example 1
The condition of lamination step uses the method identical with embodiment 1 to measure, and but, uses the material that the rigid polyvinyl chloride resin replaces the outer layer segment among the embodiment 1.The results are shown in Table 1.Shown in data in the table, the temperature range that is suitable for laminating operation is very narrow.
Machine and employed original material are below method of testing and its result's evaluation is listed in.
Modular heat-sealing machine: produce by Ooyoshi company.
The measurement of character:
(1) laminate layers intensity:
Resin bed outside non-woven fabric is peeled off by hand.Zero expression non-woven fabric is damaged, and △ represents laminate layers is peeled off from composition surface.
(2) transfer of non-woven fabric decorative pattern:
The transfer of visual inspection decorative pattern.
Zero expression is not observed decorative pattern and is shifted;
△ represents to observe some decorative patterns and shifts, and
X represents to observe tangible decorative pattern and shifts.
Classify the component of using in embodiment 1～3 and among the comparative example 1 down as:
1. ABS resin: buy from Denki Kagaku Kogyo K.K., commodity are called Denka ABS, GR-200
2. ABS resin: buy from Denki Kagaku Kogyo K.K., commodity are called Denka ABS, HM
3. ABS resin: buy from Denki Kagaku Kogyo K.K., commodity are called Denka ABS, HH
4. high impact strength of styrene resin:
Buy from Denki Kagaku Kogyo K.K., commodity are called Denka Styrol HI-5
5. antistatic agent: buy from Sanyo Kasei Kogyo K.K., commodity are called Chemistat 303
6. antistatic agent: buy from Kao Soap company limited, commodity are called Electrostripper PC
7. antistatic agent: buy from Kao Soap company limited, commodity are called Electrostripper EA
8. carbon black insulate: buy from Mitshubishi Carbon company limited, indication of goods is MA-100
Embodiment 4
Use co-extrusion equipment and comprise that the extruder of two 40mm extruders and a 65mm is with the composition that provides in the table 2, squeeze out the table lamella, the lamination composition of stamen layer or stromal lamellae and end table lamella, having gross thickness with preparation is 230 microns, wide is three plate sheets of 500 milli sheets.The composition that is used to form the table lamella contains the antistatic agent of the alkyl amine of 2 parts of weight for base, buys the ABS resin of commodity " Electrostripper PC " by name and 100 parts of weight from Kao Soap company limited.Measure the transmittance of the thin slice of being produced.The results are shown in Table 2.It is that 290 millimeters width are 170 millimeters thin slice that thin slice is cut into length, then with bottom surface layer surface and non-woven fabric heat fusion, thereby makes the protection overcoat of 5.5 inches (13.97 centimetres) disks.The observation outward appearance of overcoat is also listed in the table 2.
Transmittance and outward appearance all are satisfied.
Embodiment 5 to 8
Used same co-extrusion equipment in the Application Example 4 pushes the resin combination that provides in the table 2 to form each lamella of above-mentioned each extrusion operation.After the extruding, the antistatic agent of alkyl amine for base coated on the surface of the resulting upper surface layer of above-mentioned each operation, this antistatic agent is to buy from Kao Soap company limited, and commodity " Electrostripper QN " by name are to form 0.02 gram/rice
2The coating of thickness.By heat fusion with basal surface lamella and non-woven fabric bonding after, thereby produce the protection overcoat of the disk that is used for 5 1/4 inches (13.34 centimetres) and observe its outward appearance.Transmittance and outward appearance all are satisfied.
Table 2
Umber by weight
Embodiment
4 5 6 7 8
ABS resin (1) 84 80 80-92
″ （2） 8 12 10 - -
Group PS resin---90-
Upper epidermis colorant (1) 8---8
Close " (2)-----
″ （3） - - 10 - -
Thing " (4)---10-
Thickness (micron) 30 20 30 30 160
Sandwich layer ABS resin (1) 99 98 99 100-
Colorant (1) 1----
″ （3） - - 1 - -
″ （5） - 2 - - -
Thickness (micron) 170 180 180 130-
Bottom surface layer ABS resin (1) 80 83 85-91.5
″ （2） 4.5 7 12.5 - -
PS resin---79.99-
Colorant 5. 10 9.5--8
″ （6） 0.5 0.5 2.5 0.01 0.5
Lime carbonate---20-
Thickness (micron) 30 20 20 70 90
The property outward appearance good carefully carefully
Energy transmittance (%) 1＞1＞1＞1＞1＞
The original material of the manufacturing multi-disc layer thin slice that the following table 2 of serving as reasons provides and used non-woven fabric.
(1) non-woven fabric: buy from Mitsubishi Rayon company limited, indication of goods is JB-3 F-4
(2) ABS resin 1.: buy from Denki Kagaka Kogyo K.K., commodity are called Denka ABS HM
(3) ABS resin 2.: buy from Denlo Kagaku Kogyo K.K., commodity are called Denka ABS QF
(4) PS resin: buy from Denki Kagaku Kogyo K.K., commodity are called Denka Styrol HI-E-6
(5) colorant 1.: buy from Tokyo Ink K.K., commodity are called DKAB-384 Y-7(yellow)
(6) colorant 2.: buy from Tokyo Ink K.K., commodity are called DKAB-584 Y-9(blueness)
(7) colorant 3.: buy from Tokyo Ink K.K., commodity are called KAM-684 Y-8(green)
(8) colorant 4.: buy from Tokyo Ink K.K., commodity are called PS-483 Y-29R(redness)
(9) colorant 5.: buy from Tokyo Ink K.K., commodity are called PS-183 Y-13W(white)
(10) colorant 6.: buy from Tokai Carbon K.K., commodity are called Seast13(black)
(11) lime carbonate: buy from Shiraishi Calcium K.K., commodity are called Whiton SB(redness)
The mensuration of character:
(1) outward appearance: the level and smooth degree on the warpage of the protection overcoat produced of detecting by an unaided eye and surface, as do not have warpage and have smooth surface then to think good.
(3) transmittance by thin slice: normally measure according to the JISC-6291 method.
Embodiment 9
Through the co-extrusion technological process, by extrusion molding is biplate layer thin slice, this thin slice have thickness be 200 microns by the ABS resin that comprises 100 parts of weight, the upper epidermis that 1. antistatic agent of 5 parts of weight is made with the composition of the insulation carbon black of 3 parts of weight, and 30 micron thickness by containing 70%(weight) modification ethylenic copolymer and 30%(weight) and the adhesion layer made of the potpourri of ABS resin.Then, measure the temperature conditions (using modular heat-sealing machine) that double-deck thin slice and dacron non-woven fabric carry out lamination.The result is by listing in 3.Composite wafer is cut into 170 * 300 millimeters shape; with the non-woven fabric lamination; at 180 ℃ of folding things that fold and form 5 inches overlapping (12.7 centimetres) disk protect overcoats down, heat seal is carried out to produce the protection overcoat in overlapping folding marginal portion under 190 ℃.
The sheath of being produced has transfer and any distortion that good surface appearance does not have the non-woven fabric decorative pattern, does not all smell niff simultaneously when heat-treating in the step of carrying out lamination with non-woven fabric and folding under heating.
Embodiment 10
Via the co-extrusion technological process, what push is three stratotype thin slices, it is 225 microns upper epidermis that this thin slice has thickness, comprising 25 micron thickness by the high impact strength of styrene resin that comprises 100 parts of weight, the thin slice that the composition of the insulation carbon black of the antistatic agent of 3 parts of weight (2) and 3 parts of weight is made, and 200 micron thickness by the high impact strength of styrene resin that comprises 100 parts of weight, thin slice that the composition of the insulation carbon black of 3 parts of weight is made and 25 micron thickness by the improved polyalkene and the 50%(weight that contain 50%) the adhesion layer made of the potpourri of high impact strength of styrene resin.Three stratotype thin slices and non-woven fabric prepare laminate layers and use same unit formula heat-sealing machine used among the embodiment 9 to measure thus.The result is by listing in table 3.By folding under 170 ℃ and under 160 ℃, carrying out heat seal and promptly produce the protection overcoat.
The protective sleeve of being produced has good surface appearance and does not have transfer and any distortion of non-woven fabric decorative pattern, does not all smell niff simultaneously when heat-treating in the step of carrying out lamination with non-woven fabric and folding under heating.
The comparative example 2
Measure the temperature conditions that carries out lamination with non-woven fabric, with the upper surface layer among the hard polyvinylchloride resin replacement embodiment 9.The results are shown in table 3.The temperature range that lamination is allowed is extremely narrow.
The original material that uses is below method of testing and result's thereof evaluation is listed in.
Property testing:
(1) laminate layers intensity:
Resin bed outside non-woven fabric is peeled off by hand.Zero expression non-woven fabric is damaged, and △ represents laminate layers is peeled off from composition surface.
(2) decorative pattern of non-woven fabric shifts:
The transfer of visual inspection decorative pattern.
Zero expression is not observed decorative pattern and is shifted,
△ represent to observe some decorative patterns shift and
X represents to observe tangible decorative pattern transfer printing and moves.
Table 3
Lamination
Temperature, pressure time laminate layers intensity non-woven fabric
℃ kg/cm (second) decorative pattern shifts
140 0.5 0.5 ○ ○
150 0.5 0.5 ○ ○
9 170 0.5 0.5 ○ ○
190 0.5 0.5 ○ ○
210 0.5 0.5 ○ ○
Embodiment 220 0.5 0.5 00
150 0.5 0.5 ○ ○
160 0.5 0.5 ○ ○
10 180 0.5 0.5 ○ ○
200 0.5 0.5 ○ ○
220 0.5 0.5 ○ ○
230 0.5 0.5 ○ ○
150 0.5 0.5 △ ○
Contrast 2 160 0.5 0.5 zero zero
Embodiment 170 0.5 0.5 00
180 0.5 0.5 ○ △
Classify as down embodiment 9 and 10 and comparative example 2 in the compound that uses:
(1) ABS resin: can buy from Denki Kagaku Kogyo K.K., commodity are called Denka ABS, GR-2000
(2) high impact strength of styrene resin: buy from Denki Kagaku Kogyo K.K., commodity are called Denka Styrol HI-R-5
(3) antistatic agent 1.: buy from Sanyo Kasei Kogyo K.K., commodity are called Chemistat 3033
(4) antistatic agent 2.: buy from Kao Soap company limited, commodity are called Electrostripper PC
(5) carbon black: buy from Mitsubishi Carbon company limited, indication of goods is MA100
(6) modification olefin(e) multipolymer: buy from Mitsubishi Petrochemical company limited, commodity are called Modic E-300K.
Claims (25)
1, the protection overcoat that is used for disk comprises that by antistatic styrene be the skin that the resin combination of base is made; internal layer with the non-woven fabric of described outer field inner lamination; described outer field thickness is in 150 to 280 microns scope, and the gross thickness of composite wafer is in 300 to 600 microns scope.
2, protection overcoat according to claim 1, wherein said skin are the resin combination of the antistatic styrene of individual layer for base.
3, according to the described protection overcoat of claim 1, wherein said skin is double-deck, comprises by antistatic styrene being the ground floor made of resin combination of base and being the second layer that is configured in described ground floor inner face that the resin of base is made by insulation styrene.
4, protection overcoat according to claim 1; wherein said skin is three layers; comprise by antistatic styrene being the ground floor made of resin combination of base and being the second layer that is configured in described ground floor inner face that the resin of base is made by the styrene of insulation, and by antistatic styrene be the resin combination of base make be configured in the 3rd layer of described second layer inner face.
5, protection overcoat according to claim 1, wherein said styrene are a kind of for the composition of resin of base contains to be the alkyl amine antistatic agent of 0.1～7 part of weight of 100 parts of calculating by styrene for the resin binder weight of base.
6, protection overcoat according to claim 1, described skin with anti-static function has dense antistatic agent coating, and in solid-state basic unit, Density Distribution is between 0.001～0.1 gram/rice.
7, protection overcoat according to claim 5, described alkyl amine antistatic agent is to be selected from N, the fatty acid ester of two (2-hydroxyethyl) the fat amine of N-and polyoxyethylene lauryl amine and polyoxyethylene lauryl amine.
8, protection overcoat according to claim 1, described antistatic styrene contains the conductive carbon black of 3～35 parts of weight for the resin combination of base is the styrene base-material resin based on 100 parts of weight.
9, protection overcoat according to claim 8, described conductive carbon black are Super Conductive Furnace carbon blacks, Eelectric Conductive Furnace carbon black, Ketjen Black EC carbon black or acetylene black.
10, protection overcoat according to claim 1, described antistatic styrene are that the resin combination of base comprises the styrene resin masterbatch based on 100 parts of weight, contain the conducting metal of 2～25 parts of weight.
11, protection overcoat according to claim 10, described conducting metal is copper, aluminium, iron, nickel or stainless steel.
12; protection overcoat according to claim 1; described styrene is from the high impact strength of styrene resin for the resin of base; be normally used styrene resin and 20%(weight at least) the high impact strength of styrene resin; vinyl cyanide/styrene/butadiene copolymers; methacrylonitrile/styrene/butadiene copolymers; styrene/butadiene block copolymer; vinyl cyanide/acrylic rubber/styrol copolymer; vinyl cyanide/EP rubbers/styrol copolymer; vinyl cyanide/Chlorosulphonated ethylene/styrol copolymer is selected in the potpourri series that vinyl cyanide/α-Jia Jibenyixi/butadiene copolymer is mixed and is carried out blending thus.
13, the described non-woven fabric of protection overcoat according to claim 1 is to be selected from polyester, rayon, aromatic polyamide fiber and aminanthine non-woven fabric.
14, protection overcoat according to claim 1; also be included in the middle layer of resin of the described insulation styrene that inside surface is arranged mutually between skin and internal layer, reduce the total transmittance that passes through and make it to be no more than 1% thereby above-mentioned skin and middle layer have colorant for base.
15, protection overcoat according to claim 14, the colorant that colorant that contains in the above-mentioned skin and above-mentioned centre are contained has same color, but different color densities are arranged.
16, protection overcoat according to claim 14, the content of the colorant agent that contains in the wherein above-mentioned layer is than the content height of colorant in the above-mentioned middle layer.
17, the colorant that contains in the protection overcoat according to claim 14, the colorant that contains in the wherein above-mentioned skin and above-mentioned middle layer has different colors.
18, protection overcoat according to claim 14, above-mentioned skin are the resin combination of the antistatic styrene that contains described colorant of individual layer for base.
19, protection overcoat according to claim 14; wherein above-mentioned skin is double-deck, and the antistatic styrene that comprises ground floor is the insulation styrene that contains colorant and arrange mutually with described ground floor inside surface of the resin bed of base and the second layer resin bed for base.
20, protection overcoat according to claim 14; wherein said middle layer is double-deck, and the insulation styrene that the insulation styrene that contains white color agents that comprises ground floor is arranged mutually for the colorant that contains the color that is different from white of the resin of base and the second layer and with the ground floor inside surface is the resin of base.
21, protection overcoat according to claim 14; wherein said middle layer is double-deck; comprise that there is the same color group containing of ground floor with the skin of being carried but the insulation styrene of different color density is the resin of base, and be the second layer that the resin of base is formed with insulation styrene that the ground floor inner face is arranged mutually by the colorant that contains different colours.
22, protection overcoat according to claim 1 comprises that further being arranged between described skin and the described internal layer by olefin copolymer or above-mentioned olefin copolymer and styrene is the adhesive linkage that the potpourri of the resin of base is formed.
23, protection overcoat according to claim 22, the styrene in the wherein said adhesive linkage is identical with styrene in described skin for basic resin for the resin of base.
24, protection overcoat according to claim 22, wherein said potpourri contain that to be no more than weight be 90% the styrene resin for base.
25, protection overcoat according to claim 22; wherein said olefin copolymer is from the ethylene/vinyl acetate multipolymer; ethene/butadiene-1 multipolymer, and the multipolymer of the alkene of unsaturated carboxylic acid or acid anhydride and modification, and ethene improved/acetate ethylene copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103654 CN1008953B (en) | 1985-05-20 | 1985-05-20 | Jacket for floppy disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103654 CN1008953B (en) | 1985-05-20 | 1985-05-20 | Jacket for floppy disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103654A CN85103654A (en) | 1986-12-03 |
| CN1008953B true CN1008953B (en) | 1990-07-25 |
Family
ID=4793345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103654 Expired CN1008953B (en) | 1985-05-20 | 1985-05-20 | Jacket for floppy disk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008953B (en) |
-
1985
- 1985-05-20 CN CN 85103654 patent/CN1008953B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85103654A (en) | 1986-12-03 |
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