CN103080196A - Packaging film - Google Patents
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- CN103080196A CN103080196A CN2011800417442A CN201180041744A CN103080196A CN 103080196 A CN103080196 A CN 103080196A CN 2011800417442 A CN2011800417442 A CN 2011800417442A CN 201180041744 A CN201180041744 A CN 201180041744A CN 103080196 A CN103080196 A CN 103080196A
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Abstract
Disclosed is a packaging film with excellent transverse cutting properties; also disclosed is a manufacturing method thereof. The disclosed packaging film comprises a polymethylpentene-1 resin composition containing (A) 100 parts by mass of polymethylpentene-1 resin, and (B) 0.5-60 parts by mass polypentene-1 resin and/or 0.1-20 parts by mass liquid paraffin, wherein the total amount of component (B) does not exceed 75 parts by mass. It also holds that (1) the cut deviation amount (d) is 10mm or less in film cutting tests, (2) the ratio P/Q of the elongation (P) from tension on the ends in the length direction of the film and the elongation (Q) from tension on the ends in the horizontal direction is 0.25 or less, and (3) the film thickness is 3-30[mu]m.
Description
Technical field
The present invention relates to a kind of in general family, food selling industry, diet provide service etc., main in the packing purposes of food general film for packaging.Relate in particular to the manufacturing process of film for packaging with excellent crosscut and film for packaging and above-mentioned film for packaging is taken in to without the film for packaging goods in the containing box of the cutting assisted tools such as sawtooth.
Background technology
In the past, film for packaging is that the form of taking in the coiling film (wound film) to the containing box of as shown in Figure 5 rectangular parallelepiped provides, and pulls out since then the amount that needs, by some method with respect to length direction and transverse cutting and for.The method of transverse cutting is most often utilized the method for the long strip shape sawtooth of mask plate of being provided to containing box etc.
But, the sawtooth existence can injure the problem that the safety issue of hand etc., containing box made of paper and metal-made sawtooth must separate when discarded, those ways to solve the problem propose to be had: the sheet material of the irregular metal powder of will adhere replaces sawtooth and for the method (patent documentation 1) of cutter; Length direction at film has continuous processing scar, and forms the method (patent documentation 2) of cutting assisted tool in the part of the containing box of processing therewith the contact of scar zone; Cut crannied method (patent documentation 3) etc. in the end of coiling film.
But, preservative film is to be cut into prerequisite along cutter in the past, therefore for the countermeasure of the straight cuts of transverse direction and insufficient, moreover completely without the thinking for the cutting of adenticulate cosmetics case, if the by force cutting without cutter, even if then initial incision is along the transverse direction incision, but cut direction also tends to oneself midway gradually to the length direction revolution, and can't satisfy on practical.
[prior art document]
[patent documentation]
The clear 61-217345 communique of [patent documentation 1] Japanese Patent Laid-Open
[patent documentation 2] Japanese patent laid-open 11-124133 communique
[patent documentation 3] Japanese Patent Laid-Open 2001-322636 communique
Summary of the invention
The people such as present inventor study with keen determination for the film for packaging that obtains the crosscut excellence, found that, the film that comprises polymethylpentene-1 resin composition and have a specific physics value can be reached above-mentioned purpose.
That is, the present invention is a kind of film for packaging, it is characterized in that: comprise polymethylpentene-1 (polymethylpentene-1) resin composition, above-mentioned polymethylpentene-1 resin composition contains
(A) polymethylpentene-1 (polymethylpentene-1) is resin 100 mass parts, and
(B) polybutene-1 (polybutene-1) is resin 0.5 mass parts～60 mass parts and/or whiteruss (liquid paraffin) 0.1 weight part～20 weight parts, wherein the total amount of composition (B) is no more than 75 mass parts, and satisfies following (1)～following (3).
(1) the cutting deviation amount (δ) in the film cutting test is below the 10mm;
(2) the end tensile elongation (P) of the length direction of film is below 0.25 with the ratio P/Q of the end tensile elongation (Q) of transverse direction;
(3) thickness is 3 μ m～30 μ m;
Herein, cutting deviation amount (δ) is to have limit α (length 300mm) and limit β (length 220mm) and the limit α rectangle film parallel with the length direction of film as test film, the otch of the central part cut-in length 3mm of a limit α therein, with pulling stretch the limit α side of having cut otch the two jiaos lines of cut when film cut, with the maximum value (unit: mm) that deviates to the vertical reference line of falling of another limit α from otch; To have limit A (length 60mm) and limit B (length 20mm) and the limit A rectangle film parallel with the length direction of film as test film than P/Q, elongation (P) during test film fracture during with the wherein limit A of draw speed 200mm/ minute tension test sheet, the ratio of the elongation (Q) when rupturing except the limit A of the test film test film when carrying out tension test in the mode identical with above-mentioned (P) the transverse direction of film is parallel.
And, the invention provides a kind of manufacturing process of above-mentioned film for packaging.Aforesaid method comprises: use the T mould to extrude polymethylpentene-1 resin composition and obtain the film for packaging of thickness 3 μ m～30 μ m, above-mentioned polymethylpentene-1 resin composition contains
(A) polymethylpentene-1 is resin 100 mass parts, and
(B) polybutene-1 is resin 0.5 mass parts～60 mass parts and/or whiteruss 0.1 weight part～20 weight parts, and wherein the total amount of composition (B) is no more than 75 mass parts;
In above-mentioned extruding, the spouting velocity E (cm of unit of every 1cm die width of the lip aperture of T mould (lip opening degree) R (the μ m of unit), thickness t (the μ m of unit), the resin combination extruded from mould
3/ hr) and air gap (air gap) A (cm of unit) satisfy following formula 1:
15≤(1/t-1/R) (E/At) * 100≤900... formulas 1.
[effect of invention]
Film for packaging of the present invention is because crosscut is excellent, do not have the cutting assisted tools such as any sawtooth even if therefore take in the case of the film of reeling, when the amount of pulling out the needs of film from case is cut, also can be easily and well cutting, the problem that therefore can fundamentally solve the safety issue that injures hand etc., when containing box made of paper and metal-made sawtooth is discarded, must separate.
Description of drawings
Fig. 1 is the figure of expression film cutting test.
Fig. 2 is the figure of expression film end tension test.
Fig. 3 is the figure that the film of the present invention surface of having implemented annular knurl processing is carried out photograph taking.
Fig. 4 is the figure that the film of the present invention surface of having implemented laser processing is carried out photograph taking.
Fig. 5 is that expression is in order to the oblique drawing of an example of the case of taking in film of the present invention.
Fig. 6 is the figure that the viscosity test of film is described.
Embodiment
Film for packaging of the present invention comprise contain (A) polymethylpentene-1 be resin and (B) polybutene-1 be polymethylpentene-1 resin composition of resin and/or whiteruss.
As the polymethylpentene-1 of composition (A) be resin except the homopolymer (homopolymer) of 4-methylpentene-1 or 3-methylpentene-1, also comprise the multipolymer of 4-methylpentene-1 and/or 3-methylpentene-1 and other alpha-olefins.Alpha-olefin can be independent a kind, also can be the combination more than 2 kinds.Alpha-olefin can be enumerated: ethene, propylene, 1-butylene, 1-hexene, 1-octene, 1-decene, 1-laurylene etc.
Composition (B) is resin and/or whiteruss for polybutene-1.Above-mentioned polybutene-1 be resin except the homopolymer of butene-1, also comprise the multipolymer of butene-1 and other alpha-olefins.Alpha-olefin can be independent a kind, also can be the combination more than 2 kinds.Alpha-olefin can be enumerated: ethene, propylene, 1-hexene, 1-octene, 1-decene, 1-laurylene etc.Aforesaid liquid paraffin is the material of the chemical stabilization of liquid of being at normal temperatures take the chain type stable hydrocarbon as main body, and commercially available example (trade(brand)name) can be enumerated: Daphne oil CP (trade(brand)name), the MORESCO-WHITE (trade(brand)name) of Japanese loose village oil (MORESCO) limited-liability company, the HICALL K (trade(brand)name) of Ka Naida (Kaneda) limited-liability company etc. of the emerging product of bright dipping limited-liability company.
Amount as for composition (B), with respect to composition (A) 100 mass parts, polybutene-1 is that resin is preferably 0.5 mass parts～60 mass parts, is preferably 1 mass parts～25 mass parts, whiteruss is preferably 0.1 mass parts～20 mass parts, is preferably 1 mass parts～12 mass parts.Wherein when to use polybutene-1 be these two kinds of resin and whiterusss, allotment amount separately was in the above-mentioned scope, and the allotment amount that adds up to is 0.6 mass parts～75 mass parts, was preferably 2 mass parts～35 mass parts, was more preferred from 3 mass parts～25 mass parts.If the amount of composition (B) is more than the above-mentioned upper limit, then the crosscut of the film of gained is poor.If the amount of composition (B) is less than above-mentioned lower limit, then as the necessary poor adherence of film for packaging.
In above-mentioned polymethylpentene-1 resin composition, in the scope of not violating the object of the invention, can add auxiliary material.By those auxiliary materials, can give and regulate as the necessary physical property of film for packaging, for example tackiness or the transparency.Auxiliary material can be enumerated: polymethylpentene-1 is the additives such as liquid processing aid, antioxidant, neutralizing agent, antifogging agent, smoothing agent (slip agent) such as thermoplastic resin (such as polypropylene and polyethylene) beyond the resin, liquid polybutene (Parleam).It is resin 100 mass parts that the allotment amount of above-mentioned thermoplastic resin and liquid processing aid adds up to respect to polymethylpentene-1, is preferably below 20 mass parts, is more preferred from below 10 mass parts.
Film of the present invention as described later as, can be by using the T modulus method that above-mentioned polymethylpentene-1 resin composition is filmed and obtains.At this moment, can use biaxial extruder, the pressurization kneader, mixing machines etc. are known mix device with mentioned component (A) and composition (B) and arbitrarily composition carry out melting and mix, by strand cutting (strand cutting), cutting known methods such as (underwater cutting) is in advance with the resin combination granulation of gained under water, the particle of gained is dropped into the film forming apparatus with T mould to be filmed, perhaps can use biaxial extruder etc. with mentioned component (A) and composition (B) and arbitrarily the composition melting mix, the product of gained is directly delivered to the T mould is filmed.
Film for packaging of the present invention be the end tensile elongation (P) of cutting deviation amount (δ), (2) length direction in the following stated (1) film cutting test with the ratio P/Q of the end tensile elongation (Q) of transverse direction, and (3) thickness be film in the specified range.
(1) the cutting deviation amount (δ) in the film cutting test
Cutting deviation amount (δ) is the physics value of the crosscut of direct representation film.Carry out in mode shown in Figure 1 in order to the film cutting test of measuring this physics value.Namely, the rectangle test film that preparation has limit α (length 300mm) and a limit β (length 220mm) (herein, limit α is parallel with the length direction of film), the otch of the central part cut-in length 3mm of a limit α is therein stretched two jiaos of the limit α side of having cut otch and film is cut with pulling.The line of cut of the film during cutting and the (unit: mm) be cutting deviation amount (δ) of the maximum value that deviates to the vertical reference line of falling of another limit α from otch.
The above-mentioned cutting deviation amount (δ) of film of the present invention is below the 10mm.Cutting deviation amount (δ) is poor greater than the crosscut of the film of 10mm.Certainly, when film was cut, comparatively ideal was to cut along reference line, and it is less to be preferably above-mentioned cutting deviation amount (δ).Be preferably in the practicality below the 8mm, be more preferred from below the 6mm, the best is below the 4mm.
(2) the ratio P/Q of the end tensile elongation (Q) of the end tensile elongation (P) of length direction and transverse direction
The end tensile elongation of film be expression to the power of wish cutting film, the ability of dealing with by distortion.The mensuration of the film end tensile elongation (P) of length direction (MD direction) is to be undertaken by film end tension test shown in Figure 2.Namely, the rectangle test film that preparation has limit A (length 60mm) and a limit B (length 20mm) (herein, limit A is parallel with the length direction (MD direction) of film), elongation during the test film fracture of mensuration during with the wherein limit A of draw speed 200mm/ minute tension test sheet is set as (P) with this elongation.The film end tensile elongation (Q) of transverse direction (CD direction) except the limit A of test film with the transverse direction of film (CD direction) is parallel, measure in the mode identical with the mensuration of above-mentioned (P).In above-mentioned tension test, stretched portion is not for the central authorities of test film but the end, is to stretch because usually hold the end when the film cutting of reality.Draw direction be length direction (MD) if the time note cutting to transverse direction (CD), then the ratio P/Q of the end tensile elongation (Q) of the end tensile elongation (P) of MD direction and CD direction is crosscut and the ratio of the generation easiness of rip cutting, this than P/Q less than 1 o'clock, be worth less expression crosscut than the easier generation of rip cutting, this is 1 o'clock than P/Q, horizontal the cutting property with indulging of expression is identical, and this greater than 1 o'clock, is worth larger expression rip cutting than the easier generation of crosscut than P/Q.In order to use the containing box without the cutting assisted tool, must make this value is below 0.25.Be preferably below 0.20, the best is below 0.15.
(3) thickness
Thickness is preferably 3 μ m～30 μ m, is preferably 5 μ m～20 μ m.If the above-mentioned upper limit of Film Thickness Ratio is thick, then can't obtain sufficient crosscut.In addition, if film then can become rigid film than the above-mentioned upper limit is thick, and do not satisfy when fresh-keeping tackiness to tableware etc.If the above-mentioned lower limit of Film Thickness Ratio is thin, then operation inconvenience, and be difficult to carry out film masking or slit processing.
Find that in addition film for packaging of the present invention can make above-mentioned polymethylpentene-1 resin composition make by the masking method of extruding of using the T mould under given conditions and obtain.Above-mentioned manufacturing process is characterised in that: arrive cooling roller until use the masking of extruding of T mould under the larger condition of the Deformation velocity of the film till becoming the film of final size at the film of the molten state that flows out mould.Namely in the air gap of mould till the cooling roller, the film of molten state must be left behind greatly and soon.Usually known, if increase deflection and the Deformation velocity of the film of the molten state that flows out mould in the T molded membrane, then the vertical elongation of the film of gained diminishes.The people such as present inventor are repeatedly with keen determination research in order to obtain the good film for packaging of crosscut, found that, if with above-mentioned polymethylpentene system-1 resin combination in the specific lower masking of creating conditions that reduces vertical elongation, then can obtain the improved film of crosscut.Above-mentioned creating conditions specifically can be showed by following formula 1.
15≤(1/t-1/R) (E/At) * 100≤900... formulas 1
Herein, R is the lip aperture (the μ m of unit) of T mould, and t is the thickness (the μ m of unit) of the film of gained, and E is the spouting velocity (cm of unit of the die width of every 1cm of the resin combination extruded from mould
3/ hr), A is air gap (cm of unit).
Below above-mentioned formula 1 is described., because the distortion of the length direction of film occupies great proportion, therefore when considering Deformation velocity, can only study for the distortion of length direction in the distortion to the film between the cooling roller from mould in the T molded membrane.
The deflection of length direction
If will be set as Δ E from the squeeze-up accumulated amount of the resin among the small time Δ t of mould (width W), with this moment the length setting of extruding be Δ x, then by
Δ E=WR Δ x... formula 1-1
Obtain
Δ x=Δ E/WR... formula 1-2.
Herein, if set film forming condition take Δ E as fixing mode, then W is for fixing, therefore
Δ x=a/R (a is rate constant (a=Δ E/W)) ... formula 1-3.
On the other hand, the length setting of the film of gained was X when the resin of the amount of Δ E was arrived cooling roller, was t with thickness setting.Herein, the distortion of transverse direction is compared sufficiently little with length direction and can be ignored, therefore, because the width of film is W, thereby
ΔE＝WtX，
According to formula 1-1, obtain
WRΔx＝WtX
∴X＝RΔx/t。
Therefore, obtain according to formula 1-3
X=a/t... formula 1-4.
Therefore, the distortion X-Δ x of length direction obtains according to formula 1-2 and formula 1-4
X-Δ x=a/t-a/R=a (1/t-1/R) ... formula 1-5.
Deformation time
The distortion of above-mentioned length direction be fused film flow out the T mould until with till cooling roller contacts between, namely the time by air gap occurs.Air gap is average film coiling speed (V between air gap (A)/air gap by time T
Ave), but known above-mentioned V-bar (V
Ave) film coiling speed (V when arriving cooling roller with film approx
a) proportional (for example pretty filial piety of golden well, plastic cement is aging, and 32, (10), 168 (1986); The quick filial piety of Jin Jing, fiber association will will, 41, T-409 (1985); The quick filial piety of Jin Jing and boat wood chapter, fiber association will, 41, T-521 (1985); The quick filial piety of Jin Jing and boat wood chapter, fiber association will, 42, T-1 (1986)).Therefore, air gap is by time T and air gap (A)/film coiling speed (V
a) proportional.And, film coiling speed (V
a) proportional with spouting velocity E, inversely proportional with the thickness t of film.Therefore, time T is that the thickness t of and film longer with air gap A is longer and longer, spouting velocity E is less is larger and longer.Therefore, time T can represent in the following manner.
T=bAt/E (b is rate constant) ... formula 1-6
The Deformation velocity of length direction
The Deformation velocity of length direction is to obtain according to formula 1-5 and formula 1-6
(X-Δ x)/T=a (1/t-1/R)/(bAt/E)=c (1/t-1/R) is (c is rate constant (c=a/b)) (E/At) ... formula 1-7.
Herein, the unit of t (thickness) and R (lip aperture) is μ m, and the unit of E (spouting velocity) is cm
3/ hr, the unit of A (air gap) is cm, if use those units, then the unit of above-mentioned formula is (1/ μ m) { (cm
3/ hr)/(cm μ m) }=(cm
2/ μ m
2) (1/hr)=(1/hr) * 10
8
For easy rate constant c is set as 1 * 10
6Formula be above-mentioned formula 1.That is, formula 1 is the formula that represents easily the length direction Deformation velocity.
In order to obtain as the good film for packaging of the crosscut of purpose of the present invention, be more than 15 and must make the value of formula 1.Be preferably more than 25.Even if the upper limit is to use vacuum chamber or also can't guarantee the zone of masking stability with ear injector etc., if consider the general ability of present film-making machine, then is about 900.
In order to satisfy formula 1, and make the t attenuation, particularly, also consider the operability as goods, be preferably and be set as 5 μ m～20 μ m, be more preferred from and be set as 8 μ m～15 μ m, and shorten A, and specifically be set as 0.5cm～2cm, in the scope that can guarantee masking stability, increase E, the concrete specification that also depends on film-making machine, and can be set as 100cm
3More than/the hr.Because R affect degree in formula 1 is less, therefore consider masking stability or extrude load etc. and can select to be easy to the numerical value of masking that the concrete specification that also depends on film-making machine is preferably about 300 μ m～900 μ m.Certainly, if the value of each parameter satisfies formula 1, then be not limited to those numerical value, but employed parameter value in the use-case for example.
Film for packaging of the present invention is preferably, except above-mentioned (1)～above-mentioned (3), also have in the characteristic of following (4)～following (6) more than a kind.
(4) the end tensile elongation (P) of MD direction
Above-mentioned is that horizontal stroke and vertical cutting property are carried out relatively ratio than P/Q, even if therefore than P/Q near 0 value, when P value is larger, also can't easily cut, thereby can't use without the containing box that cuts assisted tool.Therefore, being preferably the P value is below 120%.Be more preferred from below 100%, You Jia is below 50%.
(5) the end tension fracture power (a) of MD direction
The tension fracture power of film end is the index that fracture is propagated with the power of which kind of degree.If above-mentioned tension fracture power is too small, then be not suitable for packing purposes.And if above-mentioned tension fracture power is excessive, then as described below as, will be in the case that does not have the cutting assisted tool coiling film that take in pull out when cutting from case comparatively unfavorable.Using the case do not have the cutting assisted tool, that is, the case that only is made of ground paper is when taking in the case of film, and the cutting of film is that the crestal line section at the leading section of mask plate and/or front panel and bottom panel carries out (with reference to Fig. 4).If film strength is much higher than practical necessary level, then ground paper breaks and damages containing box during the film cutting, break in order not make ground paper, and thickness is strengthened or increased to case, but and uneconomical.That is, film has unnecessary high strength and is not good enough.
The end tension fracture power (a) that film of the present invention is preferably the MD direction is 1N～15N.Be more preferred from and be limited to 10N.As for lower limit, if the requirement according to as the packing purposes then enough more than the 1N, is more preferred from more than the 2N.
The end tension fracture power (a) of MD direction (length direction) can be measured by the end tension test of above-mentioned film.Namely be as shown in Figure 2 as, the rectangle test film that preparation has limit A (length 60mm) and a limit B (length 20mm) (herein, limit A is parallel with the length direction of film), and the power (unit: N) during the test film fracture during with the wherein limit A of draw speed 200mm/ minute tension test sheet.
(6) the end tension fracture power (b) of CD direction
The end tension fracture power (b) of CD direction is more preferred from below the 10N owing to the reason identical with end tension fracture power (a) of MD direction is preferably below the 15N.As for the lower limit of (b), also according to the requirement as the packing purposes, if then enough more than the 1N, be more preferred from more than the 2N.In addition, tension fracture power (b) except the limit A of test film with the transverse direction of film (CD direction) is parallel, measure in the mode identical with the mensuration of above-mentioned tension fracture power (a).
Annular knurl processing, laser processing
Film for packaging of the present invention has excellent crosscut, becomes easily as the relatively high film of film strength, therefore has some openning in order more easily to cut to transverse direction, to be preferably.This method also has the cutting assisted tools such as file is arranged at method in the containing box, if but purpose according to the present invention select, then the best is to implement the method for annular knurl processing in the end parallel with the length direction of film.
Annular knurl processing is to clamp film by the engraved roll that utilizes metal-made etc. with engraved roll or the flat roll of metal-made or high durometer rubber etc., perhaps rolls up by this engraved roll being connected to film, and gives the processing of fine embossing or scar.Processing conditions can suitably be selected according to the material of film, usually presses as about 10N/m～50N/m.Will to the film of the present invention surface of having implemented annular knurl processing carry out photograph taking and be illustrated in Fig. 3.Annular knurl processing can be when the view picture masking, slit adds and step is set after man-hour or the slit processing independently and implements.Annular knurl processing is that at least one end of the end parallel with the length direction of film is implemented, and in order to cut from either side, to be more preferred from two ends are implemented.Working width is generally 0.1mm～10mm, is preferably 0.3mm～6mm.
In addition, if implement annular knurl processing, the film that then also can obtain to prevent to reel pull out that end connects airtight with the brute force of scroll own and the effect of the problem that can not pull.
The effect same with annular knurl processing also can obtain by laser processing.Laser processing is that the irradiation heat by laser makes film in atomic thin zone melting, and at this processing in concave shape or hole is set.There is no particular restriction for employed laser.Such as enumerating: the gas lasers such as CO2 Lasers, laser, Argon-Ion Laser and excimer laser, maybe with add the ruby lasers of the ruby crystallization of chromium as medium, with add the titanium sapphire laser of the sapphire crystallization of titanium as medium, with the solid lasers such as Nd::YAG laser of the YAG of the various YAG lasers of the yttrium in other rare earth elements displacements YAG crystallization and use interpolation neodymium.Can use the known lasers such as liquid laser, other semiconductor lasers, free electron lasers, metal vapor lasers, lasers in addition.Irradiation is output as about 0.5W～20W, considers the thickness of film or process velocity and suitably regulates.Will to the film of the present invention surface of having implemented laser processing carry out photograph taking and be illustrated in Fig. 4.Laser processing can be when the view picture masking, slit adds and step is set after man-hour or the slit processing independently and implements.Laser processing can be implemented at least one end of the end parallel with the length direction of film, in order to cut from either side, to be more preferred from two ends are implemented.Working width is generally 0.1mm～10mm, is preferably 0.3mm～6mm.
Containing box
The containing box of film for packaging uses as shown in Figure 5 front panel, bottom panel, rear panel, cover panel and mask plate sequentially to link via crestal line mostly, and have the microscler cosmetics case of two sides board, before had as the sawtooth that cuts assisted tool at the leading section of mask plate and/or the crestal line section set of front panel and bottom panel.Film for packaging of the present invention has excellent crosscut as mentioned above, so need not above-mentioned cutting assisted tool in the containing box.
On the other hand, if consider with ultimate consumer's viewpoint, then before possessed the metal-made sawtooth as the containing box of cutter become do not have fully aforesaid cutter only for the case of ground paper the time, can produce the query that whether can't cut.Therefore, set in advance extremely easy cutting assisted tool and can not allow the ultimate consumer clasp query, may be comparatively favourable at the sale scene.Aforesaid extremely easy cutting assisted tool has been preferably the dangerous less raising that injures hand etc. the cutting assisted tool of security specifically can be enumerated fine sandpaper etc.The abrasive grain of flint paper might be peeled off, and is not suitable as the cutting assisted tool of film for packaging, particularly used for packing foods film.The peeling off possibility and can observe be full of cracks by whether in the sand face by 180 degree cripping tests in simple terms and judge of abrasive grain.When for example being commercially available sand paper (then military coated abrasive tool (Noritake Coated Abrasive) limited-liability company manufacturing, water-resisting type sand paper, trade(brand)name C947H), granularity (according to JISR6001 (1998)) can be observed be full of cracks for #220 and the sand paper thicker than #220, #240 can be observed atomic thin be full of cracks, #320 and the sand paper thinner than #320 are not observed be full of cracks, therefore can judge: should use granularity is at least #240 or the sand paper thinner than #240, is preferably and should uses granularity to be #320 or the sand paper thinner than #320.180 degree cripping tests of the various granularities of above-mentioned commercially available sand paper the results are shown in following table 1.
Table 1
| Granularity (grinding particle diameter) | Abrasive grain paper (water-resisting type) 180 degree cripping tests |
| #80(300μm) | Larger be full of cracks is arranged |
| #120(180μm) | Larger be full of cracks is arranged |
| #180(63μm) | Moderate be full of cracks is arranged |
| #220(53μm) | Observe less be full of cracks |
| #240(60μm) | Observe atomic thin be full of cracks |
| #320(40μm) | Without be full of cracks |
| #600(20μm) | Without be full of cracks |
Whether film can cut by cutting assisted tool extremely easy as sand paper, can judge by abrasive grain cutting test described later.Film of the present invention can fully adapt to according to the result of above-mentioned test described later as can be known take the containing box of sand paper as the cutting assisted tool.
The method of sand paper is set in containing box, and there is no particular restriction, can enumerate: in the upper end of the leading section of mask plate and/or front panel and/or the crestal line section of front panel and bottom panel directly coating comprise the coating of abrasive grain and the method for sclerosis; Comprise the coating and sclerosis of abrasive grain in the base materials such as paper coatings after, again it is attached at the method etc. of the above-mentioned part of containing box.In addition, can be in the upper end of the leading section of above-mentioned mask plate and/or front panel and/or an end of the crestal line section of front panel and bottom panel to the total length region division sand paper of the other end; A part of zone that maybe can be arranged at above-mentioned total length zone for example only is arranged at the end.In addition, except the above-mentioned part of containing box, also can replace above-mentioned part and in other parts of containing box sand paper is set.
[example]
Below, according to example the present invention is specifically described, but the present invention is not limited to following instance.Employed material and measuring method are as described below.
Material
Poly 4-methylpene-1 is resin
MX-021: poly 4-methylpene-1, MFR (260 ℃, 5.00kg) that Mitsui Chemicals Inc. makes 23g/10 minute
MX-0020: poly 4-methylpene-1, MFR (260 ℃, 5.00kg) that Mitsui Chemicals Inc. makes 21g/10 minute
MX-004: poly 4-methylpene-1, MFR (260 ℃, 5.00kg) that Mitsui Chemicals Inc. makes 25g/10 minute
Polybutene-1 is resin
Polybutene-1, MFR (190 ℃, 21.18N) that PB8640M: Li Andebasaier (LYONDELLBASELL) company makes 28g/10 minute
Tafmer BL2000: polybutene-1, MFR (190 ℃, 21.18N) that Mitsui Chemicals Inc. makes 1.0g/10 minute
Whiteruss
The whiteruss that HICALL K-350: Ka Naida (Kaneda) limited-liability company makes
MORESCO-WHITE P-350P: the whiteruss of Japanese loose village oil (MORESCO) limited-liability company
Relatively use composition
FB3HAT: the polypropylene that Japan polypropylene (Japan Polypropylene) limited-liability company makes, cast membrane were with grade, MFR (230 ℃, 21.18N) 7.5g/10 minute
DFD0118: Low Density Polyethylene, density 923Kg/m that Japanese You Nika (Nippon Unicar) limited-liability company makes
3, MFR (190 ℃, 21.18N) 2.4g/10 minute
Measuring method
(1) cutting deviation amount (δ)
To have limit α (length 300mm) and limit β (length 220mm) and the limit α rectangle film parallel with the length direction (MD direction) of film as test film, the otch of the central part cut-in length 3mm of a limit α therein is with pulling stretch the limit α side of having cut otch two jiaos with film cutting (Fig. 1).The reference line that mensuration is vertically fallen to another limit α from otch and line of cut deviate from the maximum value that will deviate from (unit: mm) as cutting deviation amount (δ).3 people respectively carry out 3 above-mentioned tests, obtain to add up to 9 times mean value.In addition, for the film of having implemented annular knurl processing or laser processing, the above-mentioned wherein mode of a limit α when becoming the incision otch with the end through annular knurl processing or laser processing is made test film.
(2) the end tension fracture power (a) of MD direction
To have limit A (length 60mm) and limit B (length 20mm) and the limit A rectangle film parallel with the length direction (MD direction) of film as test film, strengthen by scotch tape (Sellotape (registered trademark), the class name CT15-S of Mi Qibang (Nichiban) limited-liability company) with the 10mm width along two limit B.Carry out by the wherein tension test of a limit A of tensile testing machine with draw speed 200mm/min tension test sheet, and the power (unit: N) (Fig. 2) in determination test sheet when fracture.Carry out 5 tests, obtain its mean value.In addition, for the film of having implemented annular knurl processing or laser processing, become the above-mentioned wherein mode of a limit A with the end through annular knurl processing or laser processing and make test film.
(3) the end tensile elongation (P) of MD direction
Carry out the tension test identical with above-mentioned test (2), (unit: mm), calculate elongation according to following formula of the path increment S the during fracture of determination test sheet.Carry out 5 tests, obtain its mean value.
P＝{S/(60-10×2)}×100(％)
(4) the end tension fracture power (b) of CD direction
In the test of above-mentioned (2), except the limit A of test film with the transverse direction of film (CD direction) is parallel, the power (unit: N) during with the mode determination test sheet fracture identical with above-mentioned (2).Carry out 5 tests, obtain its mean value.
(5) the end tensile elongation (Q) of CD direction
In the test of above-mentioned (3), except the limit A of test film with the transverse direction of film (CD direction) is parallel, the path increment S (unit: mm), and calculate elongation during with the mode determination test sheet fracture identical with above-mentioned (3).Carry out 5 tests, obtain its mean value.
(6) the interior cutting of containing box that does not have the cutting assisted tool is tested
Case (the every Gram Mass 400g/m of ground paper that does not have the cutting such as sawtooth assisted tool in shape shown in Figure 5
2, among 40mm * 40mm * 310mm), take in film through reeling (film that the film of width 300mm, length 20m is rolled around the paper tube of width 305mm, internal diameter 27mm, thickness 1.5mm), pull out the film of about 20cm, under the state of closure lid, utilize the front panel of case and the crestal line section of bottom panel to attempt 10 cuttings, the number of times that can cut is designated as cutting rate (%).
(7) the interior cutting of containing box that has the cutting assisted tool is tested
The case of taking in film is to use the case that attaches sand paper (then military coated abrasive tool (Noritake Coated Abrasive) limited-liability company manufacturing, water-resisting type sand paper, trade(brand)name C947H) at the mask plate leading section of the case identical with employed case in above-mentioned (6), carries out the test identical with above-mentioned (6).In addition, in this test, utilize the mask plate leading section that has attached sand paper to attempt cutting.Bend and use double sticky tape to attach in the mode of surperficial each 1cm of the back side of covering above-mentioned mask plate leading section on the sand paper of width 2cm * length 310mm.The granularity of employed sand paper is #320 and #600.
Have sand paper as the case of cutting assisted tool for film is adapted to, and must make above-mentioned cutting rate be at least 80%, be preferably at least 90%, be more preferred from 100%.In addition, if add the possibility of peeling off of above-mentioned abrasive grain, then investigate and to reach above-mentioned cutting rate with #320 or the grind size thinner than #320.
(8) viscosity test (rice dumpling packing)
The kadsurae coccineae (equilateral triangle shape, weight 100g, 1 limit 7cm, thickness 4cm) of normal temperature (25 ℃) is packed with cutting into the square foursquare film of 30cm in mode shown in Figure 6, the film end is tightened into the paper string shape.By following three grades of retentivities of estimating packed state.
3: paper string does not scatter, and keeps initial state always.
2: paper string slightly has and unclamps, but is not the degree of exposing for rice dumpling.
1: paper string unclamps and rice dumpling exposes.
(9) transparency (haze value)
Measure according to JIS K7105.
Example 1～example 9
Use each composition of the allotment amount (mass parts) shown in the table 2, use the T molded membrane device of limited-liability company of JSW, the film of the thickness shown in the manufacturing table 2.Film forming condition as described below.Use the film of gained to test (1)～test (9).The results are shown in table 2.
25 ℃ of chill-roll temperature
290 ℃ of mould outlet resin temperatures
Use vacuum chamber and band ear injector
Air gap (A) 1.5cm
Lip aperture (R) 400 μ m
Spray volume (E) 0.8Kg/hr (899cm of every 1cm die width of the resin combination of extruding from mould
3/ hr)
In addition, in example 3, an end of the end parallel with the length direction of film is implemented the annular knurl processing of width 3mm.
In example 5, after target film thickness is set as 4 μ m and is filmed, have split ear, cause as goods get the film narrowed width, but obtain to have the film of specific physics value.
In example 8, except the annular knurl working width being set as 0.6mm, obtain film in the mode identical with example 3.In example 9, except the laser of in example 3 width 3mm being implemented in end of the end parallel with the length direction of film processes to replace annular knurl processing, obtain film in the mode identical with example 3.The laser processing conditions is to use CO2 Lasers, is output as 1W, working width is that 3mm, process velocity are 1000mm/ second.
Example 10～example 33 and comparative example 1～comparative example 12
Use each composition of the allotment amount (mass parts) shown in the table 3, with the T molded membrane device that the condition shown in the table 2 uses limited-liability company of JSW to make, the film of the thickness shown in the manufacturing table 2.In addition, chill-roll temperature is 25 ℃, and the mould outlet resin temperature is 290 ℃, uses vacuum chamber and band ear injector.Use the film of gained to test (1)～test (5) and test (7)～test (9).The results are shown in table 3.
Can be understood that by table 3 crosscut of the film that gets according to the inventive method is excellent.On the other hand, thickness greater than the film of the comparative example 1 of scope of the present invention completely without crosscut.Use the amount of composition (B) poor more than the crosscut of the film of the comparative example 2～comparative example 4 of the resin combination of scope of the present invention, use the poor adherence of film of the comparative example 5 of the resin combination that does not contain composition (B).Comparative example 6 is spouting velocity to be set as original half example in example 28, and crosscut is poor.Comparative example 7 is the examples that in example 31 the lip aperture narrowed down, and crosscut is poor.Comparative example 8 is spouting velocity to be set as original half example in example 31, and crosscut is poor.Make thickness in the comparative example 8 greater than the film of the comparative example 9 of scope of the present invention completely without crosscut.Comparative example 10 is the examples that in example 32 air gap prolonged, and crosscut is poor.In addition, creating conditions of comparative example 10 is that reason is ground creating conditions of F.O.R Wrap (trade(brand)name) that science and technology (Riken Technos) limited-liability company makes, and be suitable with previous method.In example 27, use the polypropylene replacement as the comparative example 11 of the poly 4-methylpene-1 of (A) composition and use the film of poly comparative example 12 all in the test of cutting deviation amount, to produce significantly vertical elongation, and completely without crosscut.
Example 34～example 36 and comparative example 13
In example 34, an end of the end parallel with the length direction of the film of example 10 is implemented the annular knurl processing of width 3mm.Processing conditions is that pressing quantity is that 0.2mm, working width are that 3mm, process velocity are 400m/ minute.In the example 35, working width is set as beyond the 0.6mm, implements annular knurl processing in the mode identical with example 34.Will be to the enforcement of example 34 the film surface of part of annular knurl processing carry out photograph taking and be illustrated in Fig. 3.In the example 36, an end of the end parallel with the length direction of the film of example 10 is implemented the laser processing of width 3mm.Processing conditions is to use CO2 Lasers, is output as 1W, working width is that 3mm, process velocity are 1000mm/ second.Will to the film surface of the part of having implemented laser processing carry out photograph taking and be illustrated in Fig. 4.In the comparative example 13, an end of the end parallel with the length direction of Saran Wrap (trade(brand)name) (preservative film of the manufacturing of Asahi Chemical Industry's household product (Asahi Kasei Home Products) limited-liability company, polyvinylidene chloride resin constituent) is implemented the annular knurl processing of width 3mm.Processing conditions is identical with example 34.For those films, carry out above-mentioned test (6).In addition, processing all for annular knurl processing, laser, the film of unenforced example 10 also carries out identical test.The results are shown in table 4.
Table 4
Comparative example 14～comparative example 17
Use following commercially available film for packaging to test (1)～test (5) and test (7)～test (9).In the test (7), the sand paper with the 6 kinds of granularities (grind size) shown in the table 5 is tested.Film to example 10 also carries out identical test.The results are shown in table 5.
Comparative example 14:Kurewrap (trade(brand)name) (preservative film of the manufacturing of Wu Yu (Kureha) limited-liability company, polyvinylidene chloride resin constituent)
Comparative example 15:Saran Wrap (trade(brand)name) (preservative film of the manufacturing of household product limited-liability company of Asahi Chemical Industry, polyvinylidene chloride resin constituent)
Comparative example 16:HITAC HI Wrap (trade(brand)name) (Hitachi changes into the preservative film of the manufacturing of Filtec (Hitachi Chemical Filtec) limited-liability company, polyvinyl chloride resin composition)
Comparative example 17:Poly Wrap (trade(brand)name) (manufacturing of limited-liability company of space section film (ubefilm), polyethylene-based preservative film)
Table 5
| ? | Example 10 | Comparative example 14 | Comparative example 15 | Comparative example 16 | Comparative example 17 |
| ? | ? | Kurewrap | Saran?Wrap | HITACHI?Wrap | Poly?Wrap |
| Thickness (t), μ m | 12 | 10 | 10 | 9 | 10 |
| Cutting deviation amount (δ), mm | 4 | 12 | 13 | 11 | 27 |
| Hold all tensile elongation (P), % | 45 | 32 | 23 | 120 | 338 |
| End tensile elongation (Q), % | 537 | 36 | 30 | 171 | 512 |
| Than (P/Q) | 0.08 | 0.89 | 0.76 | 0.70 | 0.66 |
| End tension fracture power (a), N | 8.6 | 16.8 | 17.3 | 6.5 | 5.5 |
| End tension fracture power (b), N | 2.7 | 20.0 | 19.6 | 4.5 | 3.3 |
| The cutting test, % | ? | ? | ? | ? | ? |
| #120(180μm) | 100 | 100 | 100 | 100 | 100 |
| #180(63μm) | 100 | 70 | 70 | 70 | 100 |
| #220(53μm) | 100 | 60 | 60 | 60 | 70 |
| #240(60μm) | 100 | 40 | 40 | 30 | 50 |
| #320(40μm) | 100 | 0 | 0 | 0 | 10 |
| #600(20μm) | 100 | 0 | 0 | 0 | 0 |
| Tackiness | 3 | 1 | 1 | 3 | 2 |
| The transparency (mist degree), % | ＜1.0 | ＜1.0 | ＜1.0 | 1.5 | ＜1.0 |
Claims (5)
1. film for packaging, it is characterized in that: comprise polymethylpentene-1 resin composition, above-mentioned polymethylpentene-1 resin composition contains
(A) polymethylpentene-1 is resin 100 mass parts, and
(B) polybutene-1 is resin 0.5 mass parts～60 mass parts and/or whiteruss 0.1 weight part～20 weight parts,
Wherein the total amount of composition (B) is no more than 75 mass parts,
And above-mentioned film for packaging satisfies following (1)～following (3):
(1) the cutting deviation amount (δ) in the film cutting test is below the 10mm,
(2) the end tensile elongation (P) of the length direction of film is below 0.25 with the ratio P/Q of the end tensile elongation (Q) of transverse direction,
(3) thickness is 3 μ m～30 μ m,
Herein, above-mentioned cutting deviation amount (δ) is to have limit α (length 300mm) and limit β (length 220mm) and the above-mentioned limit α rectangle film parallel with the length direction of above-mentioned film as test film, the otch of the central part cut-in length 3mm of an above-mentioned limit α therein, be stretching in two jiaos of the above-mentioned limit α side of having cut above-mentioned otch and line of cut during with above-mentioned film cutting with hand, with (the unit: mm) of the maximum value that deviates to the vertical reference line of falling of another above-mentioned limit α from above-mentioned otch; Above-mentioned is to have limit A (length 60mm) and limit B (length 20mm) and the above-mentioned limit A rectangle film parallel with the length direction of above-mentioned film as test film than P/Q, elongation (P) during above-mentioned test film fracture during with the wherein above-mentioned limit A of draw speed 200mm/ minute above-mentioned test film that stretches, the ratio of the elongation (Q) when rupturing except the above-mentioned limit A of the above-mentioned test film above-mentioned test film when carrying out tension test in the mode identical with above-mentioned (P) the transverse direction of above-mentioned film is parallel.
2. film for packaging according to claim 1 is wherein implemented annular knurl processing and/or the laser processing of width 0.1mm～10mm at least one end of the end parallel with the length direction of above-mentioned film.
3. the manufacture method of a film for packaging as claimed in claim 1 is characterized in that comprising: use the T mould to extrude polymethylpentene-1 resin composition, above-mentioned polymethylpentene-1 resin composition contains
(A) polymethylpentene-1 is resin 100 mass parts, and
(B) polybutene-1 is resin 0.5 mass parts～60 mass parts and/or whiteruss 0.1 weight part～20 weight parts, and wherein the total amount of composition (B) is no more than 75 mass parts,
And the film for packaging of acquisition thickness 3 μ m～30 μ m; In above-mentioned the extruding, the spouting velocity E (cm of unit of every 1cm die width of the lip aperture R of above-mentioned T mould (the μ m of unit), above-mentioned thickness t (the μ m of unit), the resin combination extruded from mould
3/ hr) and air gap A (cm of unit) satisfy following formula 1:
15≤(1/t-1/R) (E/At) * 100≤900... formulas 1.
4. film for packaging goods is characterized in that: the coiling film of film for packaging as claimed in claim 1 or 2 is taken in to the containing box without the cutting assisted tool.
5. film for packaging goods is characterized in that: the coiling film of film for packaging as claimed in claim 1 or 2 is taken in to grind particle diameter be in #320 or the containing box less than the sand paper of #320 to having.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010198318 | 2010-09-03 | ||
| JP2010-198318 | 2010-09-03 | ||
| JP2010-275110 | 2010-12-09 | ||
| JP2010275113A JP5539175B2 (en) | 2010-12-09 | 2010-12-09 | Method for producing packaging film |
| JP2010275110A JP5877943B2 (en) | 2010-09-03 | 2010-12-09 | Packaging film products |
| JP2010-275113 | 2010-12-09 | ||
| PCT/JP2011/069065 WO2012029607A1 (en) | 2010-09-03 | 2011-08-24 | Packaging film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103080196A true CN103080196A (en) | 2013-05-01 |
| CN103080196B CN103080196B (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180041744.2A Active CN103080196B (en) | 2010-09-03 | 2011-08-24 | Film for packaging, its manufacture method and film for packaging goods |
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|---|---|
| CN (1) | CN103080196B (en) |
| TW (1) | TWI564307B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109094162A (en) * | 2018-10-29 | 2018-12-28 | 昆山金盟塑料薄膜有限公司 | A kind of high intensity cold stretched film and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136149A (en) * | 1992-10-27 | 1994-05-17 | Riken Viny Kogyo Kk | Wrapping film |
| JPH07165940A (en) * | 1993-12-14 | 1995-06-27 | Riken Viny Kogyo Kk | Stretch-wrap film |
| JP2001322636A (en) * | 2000-05-15 | 2001-11-20 | Goichi Murui | Simple method of cutting wrapping film or aluminum foil sheet without requiring metallic cutter provided at packaging case |
| JP2009154929A (en) * | 2007-12-27 | 2009-07-16 | Idemitsu Unitech Co Ltd | Packaging bag, its manufacturing apparatus, and packaging bag manufacturing method |
-
2011
- 2011-08-24 CN CN201180041744.2A patent/CN103080196B/en active Active
- 2011-09-01 TW TW100131527A patent/TWI564307B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136149A (en) * | 1992-10-27 | 1994-05-17 | Riken Viny Kogyo Kk | Wrapping film |
| JPH07165940A (en) * | 1993-12-14 | 1995-06-27 | Riken Viny Kogyo Kk | Stretch-wrap film |
| JP2001322636A (en) * | 2000-05-15 | 2001-11-20 | Goichi Murui | Simple method of cutting wrapping film or aluminum foil sheet without requiring metallic cutter provided at packaging case |
| JP2009154929A (en) * | 2007-12-27 | 2009-07-16 | Idemitsu Unitech Co Ltd | Packaging bag, its manufacturing apparatus, and packaging bag manufacturing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109094162A (en) * | 2018-10-29 | 2018-12-28 | 昆山金盟塑料薄膜有限公司 | A kind of high intensity cold stretched film and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201219416A (en) | 2012-05-16 |
| TWI564307B (en) | 2017-01-01 |
| CN103080196B (en) | 2015-08-05 |
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