CN1347440A - Backing for adhesive tape and such tape - Google Patents
Backing for adhesive tape and such tape Download PDFInfo
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- CN1347440A CN1347440A CN98814389A CN98814389A CN1347440A CN 1347440 A CN1347440 A CN 1347440A CN 98814389 A CN98814389 A CN 98814389A CN 98814389 A CN98814389 A CN 98814389A CN 1347440 A CN1347440 A CN 1347440A
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- described backing
- adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Films useful as tape backings, and more particularly biaxially oriented polypropylene film backings and tapes including such backings. A brittle, biaxially oriented polypropylene film is provided by minimizing the nucleation density in the extruded and quenched polypropylene polymer cast sheet followed by maximizing the spherulitic growth rate of the resultant quenched polymer. The cast sheet so formed is stretched at higher-than-normal temperatures in the subsequent orientation steps for producing the biaxially oriented polypropylene film. This produces a more brittle film. The polypropylene composition, extrusion temperature, cast roll temperature (i.e., quench temperature), and stretch temperature and other parameters are selected in accordance with the teachings herein such that the resulting backing or tape has the following preferred properties, taken individually or in any preferred combination: A) an MD tensile energy at break of up to about 90 N-mm/mm<3>; B) an MD elongation to break of at least 70 %; C) a puncture energy of up to about 130 N-mm; D) a dispense energy of up to about 350 N-cm/cm<2>; E) when dispensed on commercially available serrated plastic or metal dispenser blades, the serrated edge of the tape or backing closely follows the contour of the dispensing blade; and F) an ability to be torn by hand.
Description
Invention field
The present invention relates in general to the film as adhesive tape backing, more specifically is the polypropylene screen backing of diaxial orientation and the adhesive tape that comprises this backing.
Background of invention
The polypropylene screen conventional application of diaxial orientation can advantageously combine low-cost and good machinery and optical property.Some purposes of this class film comprise housing material and adhesive band base.
The accumulation order that an important factor determining semi-crystalline polymer (as polypropylene) performance is a polymer chain.Crystallization is the degree of controlling polymers chain accumulation and a kind of method of form.The degree of accumulation order and character have very big influence to the final mechanical property of material.
The crystalline important parameter is in the control polypropylene: (1) overall crystallinity, (2) the xln number of per unit volume, and be called nucleation density, the mean diameter or the size of (3) crystallite or aggregates of crystallites (so-called spherocrystal), and the mean distance between (4) xln.When from melt, extruding and during the quenching polyacrylic polymer, polymer crystallization becomes lamellar structure, can in final cast-sheet, produce the spherocrystal macrostructure.These lamellar structures and spherulitic crystal structure couple together by link molecule, and link molecule is a part that extends to the polymer chain of another sheet from a slice platelet.The concentrated also distributed stress of these link molecule is on whole final material.
Prior art points out that the spherocrystal macrostructure that produces between the polymkeric substance cold snap is preferably few as much as possible.In order to realize this point, the someone proposes the number of per unit volume xln must be big, and " cold excessively " of the curtain coating polymkeric substance that obtains by quenching must be significantly and be rapid like this.In addition, the somebody proposes preferably to make the growth velocity maximization of lamellar structure and spherulitic crystal structure, D.W.van Krevelen, Chimia, 32 (8), in August, 1978.Van Krevelen has worked out the general principal curve of the growth velocity that relates to spherocrystal and Tc and the funtcional relationship of the ratio of polymer melting temperature.For polypropylene, Van Krevelen has reported when maximum spherulite growth rate occurs in Tc and is about 90 ℃.
Commercially available pressure sensitive adhesive tape provides (referring to United States Patent (USP) 4,451,533 and 4,908,278) with the roll coil of strip form of getting on the band device usually.Get the zig-zag cutting blade that the band device generally has metal or plastics." but cuttability " of adhesive tape is meant the sawtooth of getting band device cutting blade by adhesive tape is pulled through, can cut the amount of promptly cutting off required energy of certain-length adhesive tape or merit.But cuttability is also referred to as " allocability ".
Better be, cut adhesive tape can not produce fragment, lobe (sliver) in unpredictalbe mode, break and rupture (referring to United States Patent (USP) 4,451,533 and 4,908,278), can form clean profile of tooth cutting edge like this on cut article tape.Clean castellated edge for such as purposes such as Gift Package, repairing since aesthetic reasons be preferably.
But cuttability is mainly determined by the mechanicalness the subject of knowledge and the object of knowledge of adhesive tape backing.The cut easy degree of adhesive tape energy depends on the anti-deformation behavior (toughness) of adhesive tape backing film (being also referred to as ground).In general, this backing scribbles upper layer or laminated with upper layer, so that adhesive surface and stripper surface to be provided.In most of the cases, cut off the required energy of adhesive tape and mainly determined, and tackiness agent and other layer or coating role are very little by backing.
Known several provide the trial of the polypropylene screen of required diaxial orientation in this area.For example, referring to United States Patent (USP) 4,451,533; 5,252,389 and 5,366,796.Also known several provide the trial of the adhesive tape backing that can tear with hand (usually along backing laterally) in this area.For example, referring to United States Patent (USP) 3,491,877; 3,853,598; 3,887,745; 4,045,515; 4,137,362; 4,139,669; 4,173,676; 4,393,115; 4,414,261; 4,447,485; 4,513,028; 4,563,441; 4,581,087; 5,374,482 and 5,795,834.
Summary of the invention
By the nucleation density in extruding the polyacrylic polymer cast-sheet with quenching is minimized, make gained maximize the polypropylene screen that brittle diaxial orientation is provided then through the spherulite growth rate of quenching polymkeric substance.In addition, better be to be higher than in the orientation step that is used for producing biaxially oriented polypropylene film subsequently that the cast-sheet to formation like this stretches under the temperature of normal temperature.This process produces more brittle film.
Polypropylene composition, extrusion temperature, casting roller temperature (being quench temperature) and draft temperature or other parameter are selected according to described herein, make gained film, backing or adhesive tape have following better performance, these performances can be taked the mode of independent or optional preferred combination:
A) MD tension fracture energy is about 90N-mm/mm at most
3, better be about 30-90N-mm/mm
3, good more about 60N-mm/mm at most
3, preferably about 30-60N-mm/mm
3
B) the MD elongation at break is at least 70%, better is to be about 70-150%;
C) pierce through the about at most 130N-mm of energy, better maximum about 70N-mm by what following puncture test recorded;
D) energy (dispense energy) that blocks that records by following truncation test is about 350N-cm/cm at most
2Be about 170N-cm/cm better at most
2
E) when blocking on commercially available dentation plastics or metal dispenser blade, the toothed edge of adhesive tape or backing meets the profile of dispenser blade closely;
F) ability of tearing with hand at horizontal (TD) is defined by at least 50% success ratio as described below.Be more preferably, backing or adhesive tape can be as described below, and at least 90% success ratio tears with hand, and preferably 100%; With
(G) ability of tearing with hand at vertical (MD) is defined by at least 50% success ratio as described below.Be more preferably, backing or adhesive tape can be as described below, and at least 90% success ratio tears with hand, and preferably 100%.
One aspect of the present invention provides a kind of adhesive tape, and it comprises backing and the layer of adhesive on this backing.This backing comprises polypropylene and has been biaxially oriented at vertical (MD) and horizontal (TD) of backing.This backing is torn at horizontal (TD) available hand, and when cutting off backing on dentation plastics cutting blade, this backing shows tight toothed edge corresponding to blade contour.
In a preferable embodiment of above-mentioned adhesive tape, backing is an individual layer.
In another preferable embodiment of above-mentioned adhesive tape, when cutting off backing by truncation test, this backing mostly is 350N-cm/cm most at the cut-out energy of vertical (MD)
2Be more preferably backing and mostly be 170N-cm/cm most at the cut-out energy of vertical (MD)
2
In another preferable embodiment of above-mentioned adhesive tape, when by the puncture test backing being tested, the energy that pierces through of this backing mostly is 130N-mm most.Be more preferably, the energy that pierces through of backing mostly is 70N-mm most.
In another preferable embodiment of above-mentioned adhesive tape, backing mostly is 90N-mm/mm most at the tension fracture energy of vertical (MD)
3
In another preferable embodiment of above-mentioned adhesive tape, backing is at least 70% at the tension fracture elongation rate of vertical (MD).
In another preferable embodiment of above-mentioned adhesive tape, backing is torn at vertical (MD) available hand.
Another aspect of the present invention provides another kind of adhesive tape, and it comprises backing and the layer of adhesive that is positioned on this backing.This backing comprises polypropylene and by biaxial stretch-formed.This backing mostly is 90N-mm/mm most at the tension fracture energy of first direction
3, when this backing was cut off on dentation plastics cutting blade, the toothed edge of this backing was closely corresponding to the profile of blade.
In a preferable embodiment of above-mentioned adhesive tape, this backing is an individual layer.
In another preferable embodiment of above-mentioned adhesive tape, first direction is MD.
In another preferable embodiment of above-mentioned adhesive tape, this backing is at least 70% at the tension fracture elongation rate of vertical (MD).
In another preferable embodiment of above-mentioned adhesive tape, this backing is torn at horizontal (TD) available hand.Be more preferably, this backing is torn at vertical (MD) also available hand.
In another preferable embodiment of above-mentioned adhesive tape, when cutting off backing by truncation test, this backing mostly is 350N-cm/cm most at the cut-out energy of vertical (MD)
2Be more preferably backing and mostly be 170N-cm/cm most at the cut-out energy of vertical (MD)
2
In another preferable embodiment of above-mentioned adhesive tape, when by the puncture test backing being tested, the energy that pierces through of this backing mostly is 130N-mm most.Be more preferably, the energy that pierces through of backing mostly is 70N-mm most.
A further aspect of the invention provides another kind of adhesive tape, and it comprises backing and the layer of adhesive that is positioned on this backing.This backing comprises polypropylene and has carried out biaxial stretch-formed at vertical (MD) and horizontal (TD).This backing is 70%-150% at the tension fracture elongation rate of vertical (MD), tears at horizontal (TD) available hand.
In another preferable embodiment of above-mentioned adhesive tape, this backing is an individual layer.
In another preferable embodiment of above-mentioned adhesive tape, when by the puncture test backing being tested, the energy that pierces through of this backing mostly is 130N-mm most.Be more preferably, the energy that pierces through of backing mostly is 70N-mm most.
In another preferable embodiment of above-mentioned adhesive tape, when backing was cut off on dentation plastics cutting blade, the toothed edge of this backing was closely corresponding to the profile of blade.
In another preferable embodiment of above-mentioned adhesive tape, when cutting off backing by truncation test, this backing mostly is 350N-cm/cm most at the cut-out energy of vertical (MD)
2Be more preferably backing and mostly be 170N-cm/cm most at the cut-out energy of vertical (MD)
2
In another preferable embodiment of above-mentioned adhesive tape, this backing mostly is 90N-mm/mm most at the tension fracture energy of vertical (MD)
3
In another preferable embodiment of above-mentioned adhesive tape, backing is torn at vertical (MD) available hand.
A further aspect of the invention provides another kind of adhesive tape, and it comprises backing and the layer of adhesive that is positioned on this backing.This backing comprises polypropylene, and carries out biaxial stretch-formed at vertical (MD) and horizontal (TD).This backing is torn at horizontal (TD) and vertical (MD) available hand.
In another preferable embodiment of above-mentioned adhesive tape, backing is an individual layer.
In another preferable embodiment of above-mentioned adhesive tape, when by the puncture test backing being tested, the energy that pierces through of this backing mostly is 130N-mm most.Be more preferably, the energy that pierces through of backing mostly is 70N-mm most.
In another preferable embodiment of above-mentioned adhesive tape, when backing was cut off on dentation plastics cutting blade, the toothed edge of this backing was closely corresponding to the profile of blade.
In another preferable embodiment of above-mentioned adhesive tape, when cutting off backing by truncation test, this backing mostly is 350N-cm/cm most at the cut-out energy of vertical (MD)
2Be more preferably backing and mostly be 170N-cm/cm most at the cut-out energy of vertical (MD)
2
In another preferable embodiment of above-mentioned adhesive tape, this backing mostly is 90N-mm/mm most at the tension fracture energy of vertical (MD)
3
In another preferable embodiment of above-mentioned adhesive tape, backing is at least 70% at the tension fracture elongation rate of vertical (MD).
In above-mentioned any adhesive tape, the MD stretch ratio of backing should be at least 4: 1.
In above-mentioned any adhesive tape, the TD stretch ratio of backing should be at least 7: 1.
In above-mentioned any adhesive tape, the MD stretch ratio of backing should be at least 4: 1, and the TD stretch ratio of backing should be at least 7: 1.
The invention provides above-mentioned film,, comprise the adhesive tape of these backings by the adhesive tape backing that these films make, and the method for preparing described film, backing and adhesive tape.
Know for majority though be used for some term of specification sheets and claims, also need to explain." biaxial stretch-formed " that is used for describing film herein refer in the plane of film along two different directions, i.e. the first and second direction tensile films.Usually, but not always not like this, both direction is vertical substantially, is vertical (" MD ") (making the direction of film on film-making machine) of film and horizontal (" TD ") (perpendicular to direction of film MD) of film.MD is called as length direction (" LD ") sometimes.The stretching that biaxially-stretched film can be sequence stretching, stretch or partly make up with sequence stretching simultaneously simultaneously.Be used for describing " simultaneously biaxial stretch-formed " of film herein, refer to carry out simultaneously along the stretching of the major portion of each direction in the both direction.Unless context has requirement in addition, " orientation ", " drawing-off (draw) " and " stretching (stretch) " these terms can exchange in the text, and same, " orientation ", " drawing-off " and " tensile " are also interchangeable.
This paper is used for describing " stretch ratio " this term of drawing process or stretched film, shows the ratio of lineal measure with the preceding same partial linear length that stretches of certain portions stretched film.For example, in MD stretch ratio (" MDR ") was 5: 1 stretched film, linear dimension longitudinally was 1 centimetre the unstretching film of giving certain portions, and longitudinally size can be 5 centimetres after stretching.In TD stretch ratio (" TDR ") is 9: 1 stretched film, be 1 centimetre the unstretching film of giving certain portions along horizontal linear dimension, after stretching, can be 9 centimetres along horizontal size.
" area stretch ratio " used herein shows the area and the preceding ratio with a part of area that stretches of the stretched film of certain portions.For example, in total area stretch ratio is 50: 1 biaxially-stretched film, given 1 centimetre
2The unstretching film part can have 50 centimetres after stretching
2Area.
The mechanical stretching ratio also claims the nominal stretch ratio, by the not stretching of monoblock film and stretched dimension determine, generally can be in used specific device be used for the clamper place of stretched film and measure at film edge.Omnidistance stretch ratio, depend on nearly clamper thereby during stretching because the total drawing ratio that has the film after affected that part of not the considering of clamper.When unstretching film consistency of thickness on its whole width of input, and be close to the influence hour of clamper when stretching, omnidistance stretch ratio can equal the mechanical stretching ratio.Yet more typical is that it is thicker or thinner than film middle body that the thickness of the unstretching film of input is adjusted to the part that makes contiguous clamper.In this case, omnidistance stretch ratio is that the nominal stretch ratio is different with the mechanical stretching ratio just.These omnidistance stretch ratios or mechanical stretching than all with local elongation than different.Local elongation is than determining by the specific part (for example 1 centimetre of part) of measuring stretch preceding and stretching caudacoria.When being stretching in roughly whole piece on the film of deburring when inhomogeneous, then local elongation is more different with omnidistance stretch ratio than just.(except the zone of adjacent edge with around the clamper on limit) is basic evenly the time on being stretching in roughly whole film, then local elongation than with omnidistance stretch ratio about equally.Unless context has requirement in addition, use term to stretch herein and recently describe omnidistance stretch ratio.
Brief description of drawings
The invention will be further described with reference to the accompanying drawings for the general, and identical numbering is represented identical part in several the views.
Fig. 1 is the isometric view of the adhesive tape of the present invention's one segment length;
Fig. 2 is the side-view of adhesive tape volume of the present invention;
Fig. 3 is the isometric view of test fixture that is used for testing the cut-out performance of film of the present invention;
Fig. 4 is the isometric view that is used for the metal dispenser blade of Fig. 3 test fixture;
Fig. 5 is the side-view of Fig. 4 metal dispenser blade;
Fig. 6 is the part of Fig. 3 device and the side-view of Fig. 6 metal dispenser blade;
Fig. 7 is the typical cut-out of polypropylene tape backing of the present invention or the diagram of spoon-proof curve;
Fig. 8 is the enlarged photograph according to the polypropylene screen of the present invention (embodiment E 5) of test method cut-out as herein described;
Fig. 9 is the enlarged photograph according to the prior art polypropylene screen (Embodiment C 1) of test method cut-out as herein described.
Detailed description of the invention
Referring to Fig. 1, show the adhesive tape 10 of a segment length of a preferable embodiment of the present invention.Adhesive tape 10 comprises the polypropylene screen backing 12 of diaxial orientation, and it comprises first major surfaces 14 and second major surfaces 16.The thickness of backing 12 better is in about 0.002-0.006 centimetre scope.The backing 12 of adhesive tape 10 scribbles layer of adhesive 18 on first major surfaces 14.Tackiness agent 18 can be any suitable binder as known in the art.As known in the art, backing 12 can randomly have peel ply or the low bounding force gum layer 20 that is coated on second major surfaces 16.
Backing film 12 better comprises polypropylene.For the present invention, term " polypropylene " refers to comprise the multipolymer that contains at least about 90 weight % propylene monomer units." polypropylene " also refers to comprise and comprises the polyacrylic polymeric blends at least about 75 weight %.Be used for polypropylene of the present invention and better be being mainly isotactic.The chain isotactic index of isotactic polyprophlene is at least about 80%, and the content that dissolves in normal heptane is lower than about 15% (weight), and the density that records according to ASTM D1505-96 (" with the density of density gradient commercial measurement plastics ") is about the 0.86-0.92 gram per centimeter
3Used typical polypropylene among the present invention, the melt flow index that records under the power of 230 ℃ and 2160 grams according to ASTMD1238-95 (" measuring the flow rate of thermoplastics with the extrusion-type plastometer ") is about 0.1-15 and restrains/10 minutes, weight-average molecular weight is about 100,000-400,000, heterogeneity index is about 2-15.The peak value melt temperature that the used typical polypropylene of the present invention records with dsc better is greater than about 140 ℃, preferably greater than about 150 ℃ greater than about 130 ℃.In addition, be used for polypropylene of the present invention and can be to have ethylene monomer unit and/or contain the unitary multipolymer of 'alpha '-olefin monomers, terpolymer of 4-8 carbon atom etc., the amount of described comonomer can not have a negative impact to the desired properties and the feature of backing as herein described and adhesive tape, and its content is usually less than 10 weight %.A kind of suitable acrylic resin is the isotactic polyprophlene homopolymer resin, its melt flow index be 2.5 the gram/10 minutes, with product grade 3374 available from FINA Oil and Chemical Co., Dallas, TX.
Be used for a kind of synthetic or natural resin that polypropylene of the present invention can comprise randomly that content can not have a negative impact to required feature as herein described and performance, its molecular weight is about 300-8000, softening temperature is about 60-180 ℃.Such resin generally is selected from the class in the 4 big classes: petroleum resin, styrene resin, cyclopentadiene resin and terpine resin.The resin that is selected from above-mentioned any kind of can randomly carry out part or all of hydrogenation.Petroleum resin generally have vinylbenzene, vinyl toluene, Vinyl toluene, indenes, methyl indenes, divinyl, isoprene, piperylene and/or amylene as monomer component.Styrene resin generally has vinylbenzene, vinyl toluene, Vinyl toluene and/or divinyl as monomer component.Cyclopentadiene resin generally has cyclopentadiene and optional other monomers as monomer component.Terpine resin generally has firpene, α-Pai Xi, kautschin, limonene, myrcene and amphene as monomer component.
As known in the art, be used for polypropylene of the present invention and can randomly contain additive and other components.For example, film of the present invention can contain filler, pigment and other tinting materials, anti, lubricant, softening agent, processing aid, static inhibitor, oxidation inhibitor and thermo-stabilizer, UV light stabilizing agent and other performance modifier.Filler and other additives preferably add with significant quantity, and described significant quantity is selected so that can not influence the nucleation of casting films basically, also can the performance that preferable embodiment described herein obtains not had a negative impact.These materials generally joined before making alignment films in the polymkeric substance and (for example joined in the polymer melt before extruding the formation film).
Polypropylene can be with equipment curtain coating slabbing well known by persons skilled in the art, as long as polypropylene carries out curtain coating according to preferred temperature as herein described and method.These casting films can be drawn into preferable film as herein described then.When making polypropylene screen, the appropriate method that sheet material is carried out curtain coating is that resin is added the extruder barrel temperature is adjusted to the loading hopper of the single screw rod, twin screw, series connection or other extruder systems that can be made into stable even melt.Melt polypropylene can be expressed on the rotation refrigerative metal curtain coating wheel through sheet die.Curtain coating wheel can randomly partly immerse and be equipped with in the fluidic cooling bath, or cast-sheet also can randomly be passed through after leaving the curtain coating wheel fluidic cooling bath is housed.Those skilled in the art so that required nucleation density, size and growth velocity to be provided, make the gained stretched film have required feature as herein described and performance according to the temperature that can select this operation described herein.These temperature can be with material therefor, changes with the heat transfer characteristic of used particular device.For a specific configuration, better be following temperature.Polypropene composition should be extruded with about 245-250 ℃ temperature.The temperature of casting roller better is at least 90 ℃, better is about 90-94 ℃.
This sheet material that stretches then is to provide the backing 12 with required feature as herein described and performance.Better be that backing is biaxial stretch-formed.
In a preferable sequence stretching embodiment, the MD stretch ratio is about 4: 1 to 6: 1.Being more preferably the MD stretch ratio is about 4.5: 1 to about 5.5: 1.In another preferable sequence stretching embodiment, the TD stretch ratio was at least 7: 1.Being more preferably the TD stretch ratio is about 7: 1 to about 12: 1.In another preferable sequence stretching embodiment, the MD stretch ratio is about 4: 1 to about 6: 1, and the TD stretch ratio was at least 7: 1.Being more preferably the MD stretch ratio is about 4.5: 1 to about 5.5: 1, and the TD stretch ratio is about 7: 1 to about 11: 1.A good especially backing is biaxial stretch-formed through order, has the MD stretch ratio about 5: 1, the backing that the TD stretch ratio is about 8: 1 to 10: 1.
In an embodiment biaxial stretch-formed in preferable, the area stretch ratio is about 35: 1 to about 108: 1.Being more preferably the area stretch ratio is about 45: 1 to about 60: 1.MD part and TD part to these embodiments are selected so that required film properties as herein described and feature to be provided.
Described herein better performance can obtain according to preferred approach as herein described by any suitable equipment that is used for diaxial orientation backing 12.In all drawing process, industry manufacturing adhesive tape backing comprises with the preferable equipment of film: the biaxial stretch-formed equipment of known order, usually by make film a series of rotation rollers (its rotating speed makes film output line speed be higher than input line speed) go up through and earlier longitudinally (MD) stretch, stretch in tenter machine, on flaring exhibition track, carrying out TD then; It is biaxial stretch-formed to carry out the while with mechanical tenter machine (as United States Patent (USP) 4,330, the equipment that discloses in 499 and 4,595,738); With United States Patent (USP) 4,675, that discloses in 582,4,825,111,4,853,602,5,036,262,5,051,225 and 5,072,493 is used for simultaneously biaxial stretch-formed tentering equipment.Although biaxially-stretched film can make by tubular blown film or flat film tenter machine drawing process, when film of the present invention is used as adhesive tape backing, better be to make, with the processing difficulties of avoiding to occur with tubular blown film technology with flat film stretcher.
Those skilled in the art are according to the temperature that can select stretched operation described herein, so that the film with required feature as herein described and performance to be provided.These temperature can be with material therefor, changes with the heat transfer characteristic of used particular device.For a preferable sequence stretching equipment, better be to be used for MD tensile preheat roll and draw roll is maintained at about 120-135 ℃.Also have for the TD in the tenter machine preferably to stretch, the preheating zone is maintained at about 180-190 ℃, and drawing zone is maintained at about 160-177 ℃.For while tensile backing, better be preheating and be stretching in about 170-200 ℃ and carry out.
The backing 12 that the present invention is used, when being used as the backing of adhesive tape 10, its final thickness better is about 0.002-0.006cm.The variation of thickness better is lower than about 5%.Can use thicker or thinner film, should be appreciated that film should have enough thickness and process with being difficult to avoid too fragile, and do not want thick as to have undesirable rigidity and be difficult to processing or use.
Polypropylene composition, extrusion temperature, casting roller temperature and draft temperature and other parameter are selected according to described herein, so that gained backing or adhesive tape have following better performance, these performances can be taked the mode of independent or optional preferred combination:
A) MD tension fracture energy is about 90N-mn/mm at most
3, better be about 30-90N-mm/mm
3, good more about 60N-mm/mm at most
3, preferably about 30-60N-mm/mm
3
B) the MD elongation at break is at least 70%, better is to be about 70-150%;
C) pierce through the about at most 130N-mm of energy, better maximum about 70N-mm by what following puncture test recorded;
D) energy that blocks that records by following truncation test is about 350N-cm/cm at most
2Be about 170N-cm/cm better at most
2
E) when blocking on commercially available dentation plastics or metal dispenser blade, the toothed edge of adhesive tape or backing meets the profile of dispenser blade closely;
F) ability of tearing with hand at horizontal (TD) is defined by at least 50% success ratio as described below.Be more preferably, backing or adhesive tape can be as described below, and at least 90% success ratio tears with hand, and preferably 100%; With
(G) ability of tearing with hand at vertical (MD) is defined by at least 50% success ratio as described below.Be more preferably, backing or adhesive tape can be as described below, and at least 90% success ratio tears with hand, and preferably 100%.
Above-mentioned performance and feature are that the preferable embodiment by film that does not have tackiness agent 18 on it or backing 12 is described, and the film by there not being tackiness agent 18 on it or the embodiment of backing 12 are illustrated.Can estimate that in most of the cases, these features and performance are mainly determined by backing, and the influence of tackiness agent or other layer or coating is very little.Therefore, above-mentioned preferable characteristic and performance also are applicable to adhesive tape of the present invention.
A preferable embodiment of the present invention comprises an individual layer backing.Term used herein " individual layer " comprises the material that multilayer is roughly the same.
The tackiness agent 18 that is coated on first major surfaces 14 of adhesive tape backing 12 can be any proper adhesive known in the art.Preferred adhesive is available pressure, heat or its combination activatory tackiness agent.That suitable binder comprises is acrylate-based, the tackiness agent of rubber resin base, epoxy group(ing), carbamate groups and composition thereof base.Tackiness agent 18 can be applied by solution, water base or heat seeling coating method.Tackiness agent can comprise the preparation of heat seeling coating, the preparation of transfer coating, the preparation and the latex formulations of solvent application, also comprises lamination, thermal activation and water activatory tackiness agent.The useful tackiness agent of the present invention comprises all pressure sensitive adhesives.As everyone knows, pressure sensitive adhesive has these performances, comprising: aggressive tack and permanent adhesive, only can be bonding with finger pressure and be enough to remain on ability on the adherend.The example that is used for tackiness agent of the present invention comprises the tackiness agent based on the common composition of following substances: polyacrylic ester, polyvingl ether, elastoprene, as natural rubber, polyisoprene and polyhutadiene; Polyisobutene; Sovprene; Isoprene-isobutylene rubber; Butadiene-acrylonitrile polymer; Thermoplastic elastomer; Segmented copolymer is as styrene-isoprene and styrene-isoprene-phenylethene (SIS) segmented copolymer, ethylene-propylene-diene polymer and styrene butadiene polymkeric substance; Poly-alpha olefins; Amorphous polyolefin; Siloxanes; The multipolymer that contains ethene is as ethane-acetic acid ethyenyl ester-ethyl propenoate-Jia Jibingxisuanyizhi; Urethane; Polymeric amide; Resins, epoxy; Polyvinylpyrolidone (PVP) and vinylpyrrolidone copolymer; Polyester; And the mixture of above-mentioned substance or blend (external phase or discontinuous phase).In addition, tackiness agent also can contain additive, for example tackifier, softening agent, filler, oxidation inhibitor, stablizer, pigment, diffusate, solidifying agent, fiber, long filament and solvent.Tackiness agent also can be chosen wantonly by any currently known methods and solidify.
The general description of useful pressure sensitive adhesive can be at " polymer science and engineering complete works " the 13rd volume, and Wiley-Interscience publishing company publishes in (New York, 1988) and sees.Other descriptions of useful pressure sensitive adhesive can be at " polymer science and technology complete works " the 1st volume, and Interscience publishing company publishes in (New York, 1964) and sees.
The film backing 12 of adhesive tape 10 can randomly be handled by being exposed to flame or corona discharge or other surface treatments (comprising chemical primary coat), to improve the binding property of coating subsequently.In addition, the second surface 16 of film backing 12 also can apply with optional low viscosity gum material 20, with the binding property between restriction back adhesive layer 18 and the film 12, just can make the tape roll that is easy to uncoiling thus, this is well-known in the manufacturing field of the adhesive tape that scribbles tackiness agent.Adhesive tape 10 can screw winding rolling 22, can randomly reel on core 24, as shown in Figure 2.
Backing as herein described is well suited for many adhesive tape backing occasions.Because this backing is a conformal performance, so can be used as the masking tape backing.This backing also is applicable to other purposes, comprises application of tape (utilitytape) and lightweight case sealant tape.
Operation of the present invention can further specify by following specific embodiment.These embodiment are used for further specifying various concrete and preferable embodiments and technology.Yet, should be appreciated that within the scope of the present invention and can make many variations and change.
Test method
The film tensile property is measured
Measure vertical (MD) the tension fracture energy and the tension fracture elongation rate of film according to method described in the ASTM D-882 " tensile property of thin plastic sheet " method A.Before test, make film be in 22 ℃ (72) and 50% relative humidity (RH) 24 hours.Use Corporation available from MTS Systems, Eden Prairie, the model of MN is that the tensile testing machine of Sintech 400/S is tested.The sample that is used for this test is wide 1.25 centimetres, long 15 centimetres.Use the initial chuck spacing of 5cm and the crosshead speed (crossheadspeed) of 50.8 cm per minute.Test 10 samples for each sample in the MD direction.
Pierce through energometry
With MTS Systems Corporation, Eden Prairie, the model that MN makes is that energy is pierced through in the tensile testing machine measurement of Sintech 400/S.It is the clamp assembly that the rigid plate in 7.62 centimetres hole is formed that use has diameter by two central authorities.Use is the jumper bar that 0.318 centimetre steel pole is formed by the diameter with hemispherical tip.Loading and penetrating the displacement of measuring the jumper bar assembly in the process of every sample fully.Test is parallel to MD with sample cuts into 1.9 centimetres of wide bands.Long 12.7 centimetres of sample is clamped in the clamp assembly in order that be enough to.Speed with 254 cm per minute is carried out each test.5 samples are tested in each measurement at least.
For each test, sample is clamped in the assembly.Each sample passes the center of plate opening.Sample is fixed on the one side of clamp assembly base plate with a slice pressure sensitive adhesive tape, on the opposite side of sample, hangs on weight (75 gram) simultaneously, be under the load of constant-tension to guarantee sample.Tighten clamping plate with thumbscrew then, so that sample can not slide in process of the test.Clamp assembly is placed on below the jumper bar, makes the path of jumper bar can pass the sample center.Mensuration pierces through the required total energy of sample.
This paper comprises that term used in claims " puncture test " promptly refers to above-mentioned test.
The TD hand is torn mensuration
With the razor cutter 10 film samples being cut into width along the direction that is parallel to MD is 2.5 centimetres.These samples have smooth edges, and promptly sample does not comprise that deliberate irregularity, roughness, defective or other tear the initiation point.Tear 10 times in 22 ℃ of trials along the hand of TD.Think that the percentage that success is torn represents tearing property of TD.
The MD hand is torn mensuration
With the razor cutter 10 film samples being cut into width along the direction that is parallel to TD is 2.5 centimetres.These samples have smooth edges, and promptly sample does not comprise that deliberate irregularity, roughness, defective or other tear the initiation point.Tear 10 times in 22 ℃ of trials along the hand of MD.Think that success is torn and cause and the percentage of expansion is represented tearing property of MD.
The mensuration of toothed edge outward appearance on the film
On dentation plastic blade (3M products catalogue #105 can be available from Minnesota Mining and Manufacturing Company during day in the application, Sao Paulo, Minnesota), block the film that makes by the present invention and comparative example film described herein.Use Leitz ofWetzlar, the model Laborlux 12POL microscope that Germany makes is taken pictures to the film that blocks on this blade.Have 1/4 wavelength shift plate and using test sample between the orthogonal polarization microscope of 50 x magnifications.Observe, each among the embodiment of the invention E1 to E5 has the toothed edge that tightly conforms to plastics cutting blade profile.And the toothed edge of each is irregular among the comparative example C1 to C7, does not tightly conform to the profile of cutting blade.
The polypropylene screen that Fig. 8 shows embodiment of the invention E5 amplifies 10 times photo.As seen the toothed edge that is cut off backing tightly conforms to the profile of plastics cutting blade.Fig. 9 is the photo of 10 times of the amplifications of prior art polypropylene screen comparative example C1.As seen, toothed edge does not tightly conform to the cutting teeth profile of plastics dispenser blade.
Cut off performance: the truncation test of film (dispense testing)
Cut the sample of wide 1.91cm, long 15cm down with the razor cutter of being furnished with new blade from sample film without coating.Make sample be in 25 ℃ and 50% relative humidity 24 hours, test then.
But the test fixture that is used to measure cuttability is shown in Fig. 3.This test fixture comprises commercially available adhesive tape dispenser 100M (Scotch
TMCat.H-127 is furnished with the dispenser of two polystyrene moldings of metal cutting blade, can be during day in the application available from Minnesota Mining and Manufacturing Company, and Sao Paulo, Minnesota) be installed on the rearmounted plate 102 of aluminium of 15.2cm * 15.2cm * 1.1cm.Limit the bending (flexing) of this dispenser between the aluminium front panel 104 by the thick 0.3cm that this dispenser is placed on rearmounted plate 102 and is processed into by the profile of test dispenser 100M in cutting off process of the test.This test dispenser is firmly held between front panel 104 and the rearmounted plate 102 by threaded thumbscrew 106.Rearmounted plate 102 is fixed on the cylindrical installation pilum 108 that diameter is 2.4cm by mounting screw 110.The otch that pilum 108 is processed to have 90 ° of angles is installed, so that rearmounted plate 102 remains on the vertical center line of tensile testing machine, the angle between the axle of promptly rearmounted plate 102 and the test dispenser 100M is 0 ° with respect to the machine center line.Pilum 108 is fixed on the platform of trier by the lock pin that inserts the boring 109 in this pilum.
The hub of test dispenser 100M is inserted the aluminium axle 112 that is used to install hub, in the rearmounted plate 102 of this precession, dispenser is installed on the rearmounted plate 102 thus.The bottom of dispenser leans against on the saddle 115, in case dispenser rotates in process of the test.The installation test dispenser so that a toothrow of dispenser cutting blade perpendicular to the machine center line.Like this, the load that film to be tested is subjected to when being cut off is roughly even on its width.
Dispenser 100M comprises the steel dentation cutting blade 120 shown in the Figure 4 and 5.Steel cutting blade 120 is to form with the nickel-plated steel of thick about 0.05cm, comprises rectangle joining region 122, and it has at least film 12 so wide, is about 0.3cm on the direction corresponding to the reference direction R that crosses the film 12 that blade extends.Joining region 122 defines one and is roughly the planar surface, and test sample is placed on it temporarily.Blade 120 also comprises the insert supporting part 126 that is positioned at 122 back, joining region, the angle beta of joining region 122 and 126 one-tenth 80 ° of supporting parts.Insert supporting part 126 is about 1.32cm.Blade 120 also comprises the part that is roughly U-shaped 128 that is positioned at joining region and supporting part opposed edges place, and it has the toothrow 130 along its end.Each tooth 130 roughly is leg-of-mutton, its tip is in the plane of joining region 122 or be lower than this plane slightly, the spacing at each tooth and adjacent teeth 130 tips is about 0.12cm, the height of each tooth is defined as about 0.06cm, acutance is defined as the about 0.003cm of radius-of-curvature, shown in the summit 132 of tooth 130 form 60 ° of angles.Tooth 130 is outwards outstanding from the plane of insert supporting part 126 with about 50 ° α angle.Be roughly the both sides γ at an angle to each other of the part 128 of U-shaped, γ is 72 °.
With a slice dual coating adhesive tape (Scotch
TMCat.665) be applied on the joining region 122, sample be bonded in the adhesive surface of dual coating adhesive tape securely, in case it moves forward in cutting off test with finger pressure.Place sample and make it become 0 ° with the machine center line, the power of dispenser can roughly be distributed in the whole width of sample equably like this.The directed dispenser 100M that places is so that the tip of cutting blade 120 is under chuck 162.Place dispenser so that certain angle is directed, so that the vertical direct of travel A angulation σ of joining region 122 and trier
1Be 110 ° (referring to Fig. 6, this figure only shows the relation of cutting blade 120 and chuck 162, and the other parts of having removed dispenser and test fixture only are used for explanation).
Free end with sample is clipped in the upper grip 162 of tensile testing machine then, so that the distance between upper grip and the cutting blade 120 is 10.2cm.Do not apply tension force on the sample, thus cutting blade begin the test before do not contact with sample.Upper grip is connected in the machine crossbeam (crosshead) of advancing on supporting track 103.Then apply tension force 0.9N in advance, so that it contacts with cutting blade 120 to sample.Then, draw this backing 12 with the speed of 30 cm per minute along direction A with chuck 162.Measure and write down the load and the elongation of sample, calculate by the area under the load/elongation and cut off required energy, as shown in Figure 7, and be recorded in table 2.In Fig. 7, load is shown in the longitudinal axis, and elongation is shown in transverse axis.Load and elongation increase along segment of curve 200, and until reaching peak load 202, elongation herein is designated as 204.Then, when extending along segment of curve 206 continuation, load descends.As described herein, for the segment of curve of 202 elongation 204, calculating energy from zero elongation to maximum load.It is believed that roughly at maximum load 202 these some places, the tooth of dispenser pierces through this film, this moment, load descended with the perforation expansion of piercing through film, until cutting off fully.
Term " truncation test " used among this paper (comprising claims) promptly refers to above-mentioned test.
The preparation of embodiment
Embodiment E 1
By extruding in 230 ℃, 2160 melt flow indexes that restrain load (ASTM D1238) is that 2.8 grams/10 minutes, melt temperature are 157.8 ℃ homopolymer polypropylene, and the preparation final thickness is 0.030 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch, and thermal-setting then on casting roller.
Embodiment E 2
By extruding in 230 ℃, 2160 melt flow indexes that restrain load (ASTM D1238) is that 1.8 grams/10 minutes, melt temperature are 164.0 ℃ homopolymer polypropylene, and the preparation final thickness is 0.033 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch, and thermal-setting then on casting roller.
Embodiment E 3
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.020 millimeter a unitary film.Draw on casting roller extruded film and cooling.This extruded film then simultaneously longitudinally and laterally stretches.
Embodiment E 4
By embodiment E 3 described preparation embodiment E 4, different is that final thickness is 0.022 millimeter, and stretch ratio.
Embodiment E 5
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.036 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch on casting roller, and thermal-setting.
Comparative example C1
By extruding in 230 ℃, 2160 melt flow indexes that restrain load (ASTM D1238) is that 2.8 grams/10 minutes, melt temperature are 157.8 ℃ homopolymer polypropylene, and the preparation final thickness is 0.030 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch, and thermal-setting then on casting roller.
Comparative example C2
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.039 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch on casting roller, and thermal-setting.
Comparative example C3
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.038 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch on casting roller, and thermal-setting.
Comparative example C4
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.038 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch on casting roller, and thermal-setting.
Comparative example C5
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.038 millimeter a unitary film.Extruded film is drawn also cooling, longitudinal stretching, cross directional stretch on casting roller, and thermal-setting.
Comparative example C6
By extruding in 230 ℃, the melt flow indexes of 2160 gram loads is that 2.5 grams/10 minutes, melt temperature are 161.5 ℃ homopolymer polypropylene, and the preparation final thickness is 0.031 millimeter a unitary film.Draw on casting roller extruded film and cooling.Then, this extruded film that longitudinally and laterally stretches simultaneously.
Comparative example C7
Press the described preparation comparative example of C6 C7, different is that final thickness is 0.028 millimeter and stretch ratio.
1 listed preparation of embodiment according to the form below.Shown stretch ratio is omnidistance stretch ratio.Some embodiment test with above-mentioned certain methods, the results are shown in following table 2.
Table 1
| Sequence stretching | |||||||||||
| Embodiment | Extrude (℃) | Casting roller (℃) | The MD stretch ratio | The TD stretch ratio | MD stretches | TD stretches | Thermal-setting (℃) | Stretch simultaneously | |||
| Preheat roll (℃) | Draw roll (℃) | The preheating zone (℃) | Drawing zone (℃) | Preheating (℃) | Stretch (℃) | ||||||
| ????E1 | ??250 | ????90 | ????5∶1 | ????9∶1 | ????130 | ????130 | ????184 | ????160 | ????160 | ?????- | ?????- |
| ????E2 | ??245 | ????90 | ????5∶1 | ????11∶1 | ????135 | ????135 | ????180 | ????177 | ????146 | ?????- | ?????- |
| ????E3 | ??245 | ????90 | ????5∶1 | ????9∶1 | ?????- | ?????- | ?????- | ?????- | ?????- | ????170 | ????170 |
| ????E4 | ??245 | ????90 | ????7∶1 | ????7∶1 | ?????- | ?????- | ?????- | ?????- | ?????- | ????170 | ????170 |
| ????E5 | ??245 | ????94 | ????5∶1 | ????10∶1 | ????135 | ????135 | ????190 | ????174 | ????145 | ?????- | ?????- |
| ????C1 | ??250 | ????34 | ????5∶1 | ????9∶1 | ??125-134 | ????136 | ????177 | ????159 | ????160 | ?????- | ?????- |
| ????C2 | ??245 | ????50 | ????5∶1 | ????8.7∶1 | ????135 | ????135 | ????165 | ????165 | ????145 | ?????- | ?????- |
| ????C3 | ??245 | ????50 | ????5∶1 | ????9∶1 | ????135 | ????135 | ????180 | ????165 | ????145 | ?????- | ?????- |
| ????C4 | ??245 | ????80 | ????5∶1 | ????8.3∶1 | ????135 | ????135 | ????165 | ????165 | ????145 | ?????- | ?????- |
| ????C5 | ??245 | ????80 | ????5∶1 | ????8.7∶1 | ????135 | ????135 | ????180 | ????165 | ????145 | ?????- | ?????- |
| ????C6 | ??245 | ????90 | ????5∶1 | ????9∶1 | ?????- | ?????- | ?????- | ?????- | ?????- | ????160 | ????160 |
| ????C7 | ??245 | ????90 | ????7∶1 | ????7∶1 | ?????- | ?????- | ?????- | ?????- | ?????- | ????160 | ????160 |
Table 2
| Embodiment | MD tension fracture energy (N-mm/mm 3) | MD tension fracture elongation rate (%) | Pierce through energy (N-mm) | Block energy (N-cm/cm 2) | The TD hand is torn (%) | The MD hand is torn (%) |
| ??E1 | ????32 | ????70 | ????69 | ????167 | ????100 | ????100 |
| ??E2 | ????62 | ????145 | ????7 | ????155 | ????100 | ????100 |
| ??E3 | ????57 | ????74 | ?????- | ?????- | ????90 | ?????- |
| ??E4 | ????62 | ????73 | ?????- | ?????- | ?????- | ????100 |
| ??E5 | ????89 | ????145 | ????127 | ????322 | ????100 | ????100 |
| ??C1 | ????130 | ????136 | ????719 | ????519 | ????30 | ????10 |
| ??C2 | ????170 | ????141 | ????529 | ????455 | ????0 | ????0 |
| ??C3 | ????160 | ????138 | ????542 | ????360 | ????0 | ????0 |
| ??C4 | ????150 | ????137 | ????565 | ????355 | ????0 | ????0 |
| ??C5 | ????100 | ????122 | ????260 | ????500 | ????30 | ????0 |
| ??C6 | ????120 | ????104 | ?????- | ?????- | ?????- | ????0 |
| ??C7 | ????144 | ????95 | ?????- | ?????- | ?????- | ????0 |
Above-mentioned test and test-results just are used for explanation, rather than are used for predicting.Can estimate that the variation of test method can produce different results.
The present invention is illustrated with reference to several embodiments.It is just clear in order to understand to provide above detailed explanation and embodiment, should therefrom not understand unnecessary restriction.All patents that this paper quotes and patent application are in conjunction with being referred among the present invention.It will be apparent for a person skilled in the art that under the situation that does not depart from the scope of the invention and can make many variations embodiment.Therefore, scope of the present invention should be not limited to exact details as herein described and structure, and should be limited by described structure of the language of claims and equivalent structure thereof.
Claims (49)
1. adhesive tape, it comprises:
Backing and the layer of adhesive that is positioned on the described backing, described backing comprises polypropylene, described backing is along the MD and the TD direction diaxial orientation of described backing, described backing can be torn with hand at TD, when described backing was cut off on dentation plastics cutting blade, described backing showed tight toothed edge corresponding to blade contour.
2. adhesive tape as claimed in claim 1 is characterized in that described backing comprises an individual layer.
3. adhesive tape as claimed in claim 1 is characterized in that when cutting off described backing by truncation test described backing mostly is 350N-cm/cm most at the cut-out energy of MD
2
4. adhesive tape as claimed in claim 3 is characterized in that when cutting off described backing by truncation test described backing mostly is 170N-cm/cm most at the cut-out energy of MD
2
5. adhesive tape as claimed in claim 1 is characterized in that the energy that pierces through of described backing mostly is 130N-mm most when by the puncture test described backing being tested.
6. adhesive tape as claimed in claim 5 is characterized in that the energy that pierces through of described backing mostly is 70N-mm most when by the puncture test described backing being tested.
7. adhesive tape as claimed in claim 1 is characterized in that described backing mostly is 90N-mm/mm most at the tension fracture energy of MD
3
8. adhesive tape as claimed in claim 1 is characterized in that described backing is at least 70% at the tension fracture elongation rate of MD.
9. adhesive tape as claimed in claim 1 is characterized in that the MD stretch ratio of described backing was at least 4: 1.
10. adhesive tape as claimed in claim 1 is characterized in that the TD stretch ratio of described backing was at least 7: 1.
11. adhesive tape as claimed in claim 1 it is characterized in that the MD stretch ratio of described backing was at least 4: 1, and the TD stretch ratio was at least 7: 1.
12. adhesive tape as claimed in claim 1 is characterized in that described backing is that available hand is torn at MD.
13. an adhesive tape, it comprises:
Backing and the layer of adhesive that is positioned on the described backing, described backing comprises polypropylene, and described backing is by biaxial stretch-formed, and described backing mostly is 90N-mm/mm most at the tension fracture energy of first direction
3, when described backing was cut off on dentation plastics cutting blade, described backing showed tight toothed edge corresponding to blade contour.
14. adhesive tape as claimed in claim 13 is characterized in that described backing comprises an individual layer.
15. adhesive tape as claimed in claim 13 is characterized in that described first direction is MD.
16. adhesive tape as claimed in claim 15 is characterized in that described backing is at least 70% at the tension fracture elongation rate of MD.
17. adhesive tape as claimed in claim 15 is characterized in that described backing can tear with hand at TD.
18. adhesive tape as claimed in claim 17 is characterized in that described backing can tear with hand at MD.
19. adhesive tape as claimed in claim 15 is characterized in that when cutting off described backing by truncation test described backing mostly is 350N-cm/cm most at the cut-out energy of MD
2
20. adhesive tape as claimed in claim 19 is characterized in that when cutting off described backing by truncation test described backing mostly is 170N-cm/cm most at the cut-out energy of MD
2
21. adhesive tape as claimed in claim 13 is characterized in that the energy that pierces through of described backing mostly is 130N-mm most when by the puncture test described backing being tested.
22. adhesive tape as claimed in claim 21 is characterized in that the energy that pierces through of described backing mostly is 70N-mm most when by the puncture test described backing being tested.
23. adhesive tape as claimed in claim 15 is characterized in that the MD stretch ratio of described backing was at least 4: 1.
24. adhesive tape as claimed in claim 15 is characterized in that the TD stretch ratio of described backing was at least 7: 1.
25. adhesive tape as claimed in claim 15 it is characterized in that the MD stretch ratio of described backing was at least 4: 1, and the TD stretch ratio was at least 7: 1.
26. an adhesive tape, it comprises:
Backing and be positioned at layer of adhesive on the described backing, described backing comprises polypropylene, described backing along MD and TD by biaxial stretch-formed, described backing is 70%-150% at the tension fracture elongation rate of MD, described backing is that available hand is torn at TD.
27. adhesive tape as claimed in claim 26 is characterized in that described backing comprises an individual layer.
28. adhesive tape as claimed in claim 26 is characterized in that the energy that pierces through of described backing mostly is 130N-mm most when by the puncture test described backing being tested.
29. adhesive tape as claimed in claim 28 is characterized in that the energy that pierces through of described backing mostly is 70N-mm most when by the puncture test described backing being tested.
30. adhesive tape as claimed in claim 26 is characterized in that when described backing is cut off on dentation plastics cutting blade, described backing shows tight toothed edge corresponding to blade contour.
31. adhesive tape as claimed in claim 26 is characterized in that when cutting off described backing by truncation test described backing mostly is 350N-cm/cm most at the cut-out energy of MD
2
32. adhesive tape as claimed in claim 31 is characterised in that when cutting off described backing by truncation test described backing mostly is 170N-cm/cm most at the cut-out energy of MD
2
33. adhesive tape as claimed in claim 26 is characterized in that described backing mostly is 90N-mm/mm most at the tension fracture energy of MD
3
34. adhesive tape as claimed in claim 26 is characterized in that described backing is that available hand is torn at MD.
35. adhesive tape as claimed in claim 26 is characterized in that the MD stretch ratio of described backing was at least 4: 1.
36. adhesive tape as claimed in claim 26 is characterized in that the TD stretch ratio of described backing was at least 7: 1.
37. adhesive tape as claimed in claim 26 it is characterized in that the MD stretch ratio of described backing was at least 4: 1, and the TD stretch ratio was at least 7: 1.
38. an adhesive tape, it comprises:
Backing and be positioned at layer of adhesive on the described backing, described backing comprises polypropylene, described backing at MD and TD by biaxial stretch-formed, described backing is that available hand is torn at TD, described backing is that available hand is torn at MD.
39. adhesive tape as claimed in claim 38 is characterized in that described backing is an individual layer.
40. adhesive tape as claimed in claim 38 is characterized in that the energy that pierces through of described backing mostly is 130N-mm most when by the puncture test described backing being tested.
41. adhesive tape as claimed in claim 40 is characterized in that the energy that pierces through of described backing mostly is 70N-mm most when by the puncture test described backing being tested.
42. adhesive tape as claimed in claim 38 is characterized in that when described backing is cut off on dentation plastics cutting blade, described backing shows tight toothed edge corresponding to blade contour.
43. adhesive tape as claimed in claim 38 is characterized in that when cutting off described backing by truncation test described backing mostly is 350N-cm/cm most at the cut-out energy of MD
2
44. adhesive tape as claimed in claim 43 is characterized in that when cutting off described backing by truncation test described backing mostly is 170N-cm/cm most at the cut-out energy of MD
2
45. adhesive tape as claimed in claim 38 is characterized in that described backing mostly is 90N-mm/mm most at the tension fracture energy of MD
3
46. adhesive tape as claimed in claim 38 is characterized in that described backing is at least 70% at the tension fracture elongation rate of MD.
47. adhesive tape as claimed in claim 38 is characterized in that the MD stretch ratio of described backing was at least 4: 1.
48. adhesive tape as claimed in claim 38 is characterized in that the TD stretch ratio of described backing was at least 7: 1.
49. adhesive tape as claimed in claim 38 it is characterized in that the MD stretch ratio of described backing was at least 4: 1, and the TD stretch ratio was at least 7: 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1998/024784 WO2000031202A1 (en) | 1998-11-20 | 1998-11-20 | Backing for adhesive tape and such tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1347440A true CN1347440A (en) | 2002-05-01 |
| CN1141349C CN1141349C (en) | 2004-03-10 |
Family
ID=22268338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB988143895A Expired - Fee Related CN1141349C (en) | 1998-11-20 | 1998-11-20 | Backing for adhesive tape and such tape |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1133537A1 (en) |
| JP (1) | JP2002530511A (en) |
| KR (1) | KR20010107976A (en) |
| CN (1) | CN1141349C (en) |
| AU (1) | AU762876B2 (en) |
| BR (1) | BR9816075A (en) |
| CA (1) | CA2351432A1 (en) |
| WO (1) | WO2000031202A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103649257A (en) * | 2011-07-27 | 2014-03-19 | 3M创新有限公司 | Hand-tearable masking tape with silicone-containing low adhesion backsize |
| CN103703092A (en) * | 2011-07-27 | 2014-04-02 | 3M创新有限公司 | Hand-tearable masking tape with low adhesion backsize |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7801645B2 (en) | 2003-03-14 | 2010-09-21 | Sharper Image Acquisition Llc | Robotic vacuum cleaner with edge and object detection system |
| US7805220B2 (en) | 2003-03-14 | 2010-09-28 | Sharper Image Acquisition Llc | Robot vacuum with internal mapping system |
| BRPI0406071A (en) * | 2004-12-29 | 2006-10-10 | Brasileira De Filmes Flexiveis | bioriented polypropylene film comprising tear orientation, process for preparing said film and article comprising the same |
| CA2834408C (en) | 2011-05-04 | 2016-07-12 | Tandus Flooring, Inc. | Modular carpet systems |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3241662A (en) * | 1962-06-22 | 1966-03-22 | Johnson & Johnson | Biaxially oriented polypropylene tape backing |
| DE2920514A1 (en) * | 1979-05-21 | 1980-11-27 | Unilever Nv | DYNAMIC LOADABLE POLYPROPYLENE FILM |
| JPS5874774A (en) * | 1981-10-27 | 1983-05-06 | Mitsubishi Plastics Ind Ltd | Pressure-sensitive adhesive tape |
| US4451533A (en) * | 1983-02-09 | 1984-05-29 | Minnesota Mining And Manufacturing Company | Dispensable polypropylene adhesive-coated tape |
| DE19611501A1 (en) * | 1996-03-23 | 1997-09-25 | Beiersdorf Ag | Packing Tape |
| WO1999029794A1 (en) * | 1997-12-10 | 1999-06-17 | Minnesota Mining And Manufacturing Company | Oriented polypropylene-based backing films for adhesive tape |
-
1998
- 1998-11-20 CA CA002351432A patent/CA2351432A1/en not_active Abandoned
- 1998-11-20 EP EP98962816A patent/EP1133537A1/en not_active Withdrawn
- 1998-11-20 CN CNB988143895A patent/CN1141349C/en not_active Expired - Fee Related
- 1998-11-20 KR KR1020017006341A patent/KR20010107976A/en not_active Application Discontinuation
- 1998-11-20 BR BR9816075-3A patent/BR9816075A/en not_active IP Right Cessation
- 1998-11-20 AU AU17972/99A patent/AU762876B2/en not_active Ceased
- 1998-11-20 JP JP2000584019A patent/JP2002530511A/en not_active Withdrawn
- 1998-11-20 WO PCT/US1998/024784 patent/WO2000031202A1/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103649257A (en) * | 2011-07-27 | 2014-03-19 | 3M创新有限公司 | Hand-tearable masking tape with silicone-containing low adhesion backsize |
| CN103703092A (en) * | 2011-07-27 | 2014-04-02 | 3M创新有限公司 | Hand-tearable masking tape with low adhesion backsize |
| CN103649257B (en) * | 2011-07-27 | 2015-05-13 | 3M创新有限公司 | Hand-tearable masking tape with silicone-containing low adhesion backsize |
| CN103703092B (en) * | 2011-07-27 | 2015-10-21 | 3M创新有限公司 | What have low adhesion backsize can tear U.S. line paper self-adhesive tape by hand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1141349C (en) | 2004-03-10 |
| AU1797299A (en) | 2000-06-13 |
| KR20010107976A (en) | 2001-12-07 |
| AU762876B2 (en) | 2003-07-10 |
| EP1133537A1 (en) | 2001-09-19 |
| BR9816075A (en) | 2003-01-21 |
| JP2002530511A (en) | 2002-09-17 |
| CA2351432A1 (en) | 2000-06-02 |
| WO2000031202A1 (en) | 2000-06-02 |
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