CA2178340A1 - Conformable isolation tape - Google Patents
Conformable isolation tapeInfo
- Publication number
- CA2178340A1 CA2178340A1 CA002178340A CA2178340A CA2178340A1 CA 2178340 A1 CA2178340 A1 CA 2178340A1 CA 002178340 A CA002178340 A CA 002178340A CA 2178340 A CA2178340 A CA 2178340A CA 2178340 A1 CA2178340 A1 CA 2178340A1
- Authority
- CA
- Canada
- Prior art keywords
- elastomeric
- sheet material
- adhesive
- acrylic acid
- web
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- 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
- C09J7/21—Paper; Textile fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0025—Rubber threads; Elastomeric fibres; Stretchable, bulked or crimped fibres; Retractable, crimpable fibres; Shrinking or stretching of fibres during manufacture; Obliquely threaded fabrics
- D06N3/0027—Rubber or elastomeric fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/042—Acrylic polymers
-
- 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
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
A method of noise control in which a conformable sheet material formed from an extensible web and an adhesive is inserted between components to prevent, reduce, or eliminate noise produced by the components is provided. A conformable sheet material suitable for use in this method is also provided.
Description
~ WO95/18844 21 7~340 1 .,~,~ .. , COI~FO~RT T! I8nT~rrIoN ~rAP
FIELD OF THE INVENTION
This invention relate6 to a PL ~:S~UL e: sensitive 5 adhesive tape for cushioning adjacent components to reduce the noise caused by the 5urfaces of the components rubbing together.
BA~iK~UNU OF THE INvENTION
There are many industrial and automotive applications where ~ ts are assembled in close proximity to each other such that when the ~ e1~s are subjected to vibrations, they create annoying noises such as rattles and squeaks as the components 15 rub against each other. Products that are currently available on the market to reduce or ~,u~L eSS these noises include felt, flocked cloth, velvet, and velour which may have a layer of a ~re s_uL~ sensitive adhesive . These materials f ind limited use in that all 20 of these materials are relatively thick and do not conform to irregularly shaped surfaces because the materials are not extensible enough. There remains a need for a conformable tape which can be applied between ^ntS to ~UE~L ~SS noises caused by 25 vibration of the _ L~.
SUM~Y OF THE INVENTION
The present invention provides a method of noise control comprising inserting between components a 30 conformable sheet material comprising an extensible web and an adhesive on at least one f ace of said web so that noise produced by the I - nts is prevented, reduced, or eliminated. The adhesive comprises the polymerization reaction product of starting materials 35 comprising: (a) a polymerizable ~_ -r t comprising at least one acrylic acid ester of a nontertiary alcohol, Wo 95/18844 2 1 7 8 3 4 ~ P~
wherein the alkyl group of said alcohol contains from l to about 14 carbon atoms and (b) a reinforcing r ^r .
The present invention also provides a conformable 5 sheet material comprising a nonwoven web and an adhesive on at least one face of said web. The adhesive comprises the polymerization reaction product of starting materials comprising a polymerizable component comprising: (a) at least one acrylic acid l0 ester of a nontertiary alcohol, wherein the alkyl group of said alcohol contains from about 4 to about 14 carbon atoms, (b) acrylic acid, (c) at least one free radical initiator, and (d) a crosslinking agent. The weight ratio of acrylic acid ester to acrylic acid is 15 from 9l:9 to 96:4. The nonwoven web comprises thermoplastic elastomeric melt blown small diameter fibers having a diameter of less than about 50 microns, the thermoplastic elastomeric small diameter fibers being selected from elastomeric polyurethanes, 20 elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one vinyl monomer, elastomeric copolymers of ethylene and at least one urethane, or elastomeric A-B-A' block copolymers, wherein A and A ' are the same or dif f erent 25 thermoplastic polymer and wherein B is an elastomeric polymer block. The sheet material prevents, reduces, or eliminates noise when placed between components.
DETAILED DESCRIPTION
3 0 In a pref erred embodiment of the invention, a conformable sheet material, having sufficient extensibility of the sheet to follow the contours of the surface and sufficient adhesive force to keep the sheet adhered tightly to the surface and resist any 35 d~hrnllin~ that may occur as recovery of the sheet occurs, is applied over a curved or irregularly shaped ~ Wo 95118844 2 17 8 3 4 0 r~l,u~
surface of a first c~ -n~t. A second - ^nt is then assembled adjacent to the first ~ -nt such that the sheet material prevents the surface of the first c -nt from contacting the surface of the 5 second , ont when the components are subj ected to vibration, and any noises that would be caused from rubbing of the f irst component on the second c~ -n~nt are prevented, ~liminated, or reduced.
As used herein, conformable refers to a sheet 10 material which can be stretched or extended so that the sheet closely follows the contours of a curved or an irregularly shaped surface.
The sheet material useful in the practice of the invention includes an extensible web having a pressure 15 sensitive adhesive on at least one major surface of the web. The term extensible, as used herein, is ~yllGIIy ~ with stretchable, and refers to a web which can be stretched or elongated at least 5% under a force of about 1.2 Newtons/100 mm, e.g., a 10.0 cm long sheet 20 can be stretched to at least 10.5 cm. The amount of stretch that is useful depends upon the shape of the surface to be covered. A surface with large smooth curves will require less stretch for a sheet material to conform well, e.g., about 5% to 10% stretch. For 25 ~urfaces having small irregularities and intricate contours, the web can be stretched to at least 30%, and preferably, to greater than 100%, and more preferably greater than 200%.
The preferred sheet material is also elastic. As 30 used herein, elastic refers to the ability of a material to be stretched or extended, and to recover to a length less than the stretched length when the f orce to stretch the material is released . A pref erred elastic material will have a percent recovery of at 35 least 109~, e.g., when a 10.0 cm long web is stretched 50% to a length of 15 cm and released, the web will W0 95/18844 2 1 7 8 3 4 0 r~
recover to a length less than 14 . 5 cm. More preferably, the material will have a percent recovery of at least 25%, and most preferably, at least 80%.
Nebs useful in the practice of the invention 5 include extensible woven fabrics, elastic woven fabrics such as those sold under the trAfl~nAr^- of Lycra and spandex, extensible nonwoven f abrics, elastic nonwoven fabrics, extensible films, elastic films such as polyurethane films, and the like.
In the practice of the invention, the elastlc web i5 preferably a nonwoven web having a basis weight of about 80 to 150 grams per square meter and an elongation at break of at least 250%, and more preferably, more than 300%. It is also desirable to 15 have a tensile strength sufficient to allow the sheet material to be unwound from a roll and applied to the surf ace without breaking .
The nonwoven web is formed from elastomeric thermoplastic materials that can be formed into 2 0 elastomeric microf ibers having a f iber diameter greater than 1 micron and less than about 50 microns.
Preferably, the fiber diameters range from about 2 to 30 microns, and most preferably, from about 3 to 15 micronS .
Elastomeric thermoplastic materials that are suitable in forming the fibers of the no.,.:vvt:ll of the invention include elastomeric polyurethanes, elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one 30 vinyl monomer, elastomeric copolymers of ethylene and at least one urethane monomer, and elastomeric A-B-A' block copolymers wherein A and A' are the same or different thermoplastic polymer blocks and B is an elastomeric polymer block. Typically, A and A' are 35 styrenic moieties, and B can be polyisoprene, polybutadiene, and the like. The elastomeric ~ WO95/18844 2 1 78340 ~ c~ ~
polye6ters and elastomeric polyamides include co-polyesters (such as polyetherester) and co-polyamides.
The nonwoven web may include non-elastomeric fibers made from materials including polyethylene, 5 polyester, or polypropylene. The non-elastomeric material may also be co-extruded with an elastomeric material to form a bi . ^nt or layered fiber. A
bi-~ t fiber may include from 0 to about 70 percent, and pref erably about 5 0 to 7 0 percent, non-10 elastomeric material.
The fibers of the nonwoven web may further includefillers, dyes, pigments, and the like, in suitable amounts as long as they do not deleteriously affect the desired properties of the nonwoven web.
Suitable methods of making the nonwoven webs by a melt blown process are described by Wente , Van A ., "Superfine Thermoplastic Fibers" in Industrial Engineering Chemistry, Vol. 48, pages 1342 et seq (1956), or in Report No. 4364 of the Naval Research 20 Laboratories, published May 25, 1954, entitled "~lanufacture of Superfine Organic Fibers" by Wente, Van A., Boone, C.D., and Fluharty, E.L., except that a drilled die is preferably used. The thermoplastic elastomeric materials are extruded 25 through the die into a high velocity stream of heated air which draws out and attenuates the f ibers prior to their solidif ication and collection . The f ibers are collected in random fashion, such as on a perforated screen cylinder, prior to complete fiber solidification 30 so that the fibers are able to bond to one another to form a coherent web without the use of additional binders . The f ibers may be blown directly onto an . adhesive film on a carrier web to form the sheet.
Nonwoven webs may also be f ormed by procesSes 35 known in the art including air laying, spunbonding, spunlace, stitchbonding, and needle punching. The Wo 95/18844 2 1 7 8 3 4 0 1 ~
nonwoven web6 may be coated with adhesive by any known process including laminating to a transf er tape, roll coating or knife coating the adhesive onto the nonwoven, and spraying the adhesive onto the nonwoven.
The preferred adhesives in the practice of the invention include tackified cross-linked acrylate adhesives. Such acrylate adhesives are the polymerization reaction products of one or more monofunctional methacrylic or acrylic acid esters of lO non-tertiary alcohols having from l to 14 carbon atoms and a reinf orcing , -n~ . Pref erably, the esters have from 4 to 14 carbon atoms. Examples of suitable acrylic acid esters include 2-ethylhexyl acrylate, n-butyl acrylate, isooctyl acrylate, isononyl acrylate, 15 decyl acrylate, dodecyl acrylate, hexyl acrylate, and mixtures thereof . Pref erred acrylates include isooctyl acrylate .
~ he reinforcing . nl -r is a monomer having a higher homopolymer glass transition temperature than 20 the acrylate homopolymer. Suitable monomer6 include acrylic acid.
The ratio of acrylate monomers to comonomers can range from about 60 to 99 parts by weight acrylate per one hundred parts of polymer and the ~ )- ers can 25 range from about 40 to l parts. When acrylic acid is used as the comonomer, the ratio of acrylate monomers to . ~ is preferably in the range of 88 to 99 parts acrylate and 12 to l parts _ -rlf- - .
In a highly preferred P~nho~;r~nt, the acrylate is 30 used in an amount from greater than 90 to less than 97 parts by weight per one hundred parts of acrylate and ~n- -r and the ~ ~ is used in an amount of from less than lO to greater than 3 parts by weight per one hundred parts of acrylate and comonomer.
The pressure sensitive adhesive is also preferably tackif ied with a suitable tackif ier , i . e ., one which is ~ WO95/18844 ~ ~ 21 78340 P~l/u~
soluble in the monomers, and remains compatible with the polymers in the adhesive . The suitable tackif iers should exhibit no gross phase separation as evidenced by clouding of the D or syrup upon addition of 5 the tackif ier, or by blooming of the tackif ier in the adhesive. A suitable tackifier is a glycerine rosin ester sold by Hercules , Inc ., under the tradename of ForalT"85. The tackifier is preferably used in amounts less than about 25 parts of tackifier per one hundred 10 parts total of acrylate and comonomer, and more pref erably, less than 15 parts .
Cross-linking agents are also preferably included in the ~aSDULe: sensitive adhesive to improve the cohesive strength of the adhesive. Useful cross-15 linking agents are generally known in the art andinclude multi-functional acrylates such as 1, 6-h~Y;~nP~ i oldiacrylate and trimethylolpropane triacrylate, substituted triazines such as 2, 4-bis (trichloromethyl) -6- (4-methoxyphenyl) -s-20 triazine, metal acetyl acetonates, ortho alkyltitanates, peroxides, amide resins, m=~ minC~ resins, and the like. The acrylate adhesives may be prepared by methods known in the adhesive industry such as solvent polymerization, radiation polymerization, and 25 the like using a suitable initiator. Useful initiators include 2, 2 ' -azobis ( isobutyronitrile) and photoinitiators available from Ciba-Geigy under the Igracure tradename. In a preferred e ~ ~;r-nt~ the adhesive is the reaction product of r~n~ D
30 polymerized by ultraviolet radiation.
For certain interior applications, such as in car interiors, the pressure sensitive adhesive is selected such that it has a very low amount of volatile material and passes the Fogging Test described below.
35 The invention is further illustrated in the following non-limiting examples.
WO 9~/18844 2 1 7 8 3 4 0 P~
TEST METHODS
STRESS PANEL TEST (TEST METHOD A) Thi5 test is a measure of performance of the sheet material when it is stretched 5%, 10%, 15%, and 25%
5 when aged at the elevated temperature cycling test -described herein. The test panel is prepared by making rounded depressions across a 10 cm by 30 . 5 cm metal panel by laying a cylinder across the panel and pressing the panel against the cylinder in four 10 different areas to obtain rounded depressions having dimensions of 0 .15 cm deep by 1. 5 cm wide gap above the depression (5%), 0.4 cm deep by 2.0 cm wide gap (10%), 0 . 5 cm deep by 2 . 2 cm wide gap ( 15% ), and 0 . 7 cm deep by 2.4 cm wide gap (25%). The dimensions of the 15 depressions are such that when a sheet is laid across the depression and stretched into the depression, the sheet is stretched to the percentage indicated above, i.e., 5%, 10%, etc. The panel is then coated with White High solids Enamel WAEM 3967 available from PPG
20 Industries and cured at 121C for 35 minutes.
The painted panel is then cleaned by wiping with a solution of 50% isopropanol and 50% water and wiping dry with a lint free cloth. A strip of tape measuring 2 . 54 cm by 25 . 4 cm is placed across the length of the 25 panel over the depressions and smoothed down in the bridge areas of the panel with a PA-l plastic applicator (available from Minnesota Mining &
Manufacturing Co. ) The panel is then placed in an oven at 70C for one minute. While the panel is still in 30 the oven, the tape is pressed into each depression on the panel with thumb pressure. The panel is then removed from the oven and the applicator is run across the tape in the depressions. The prepared panel is then conditioned at 21C for 72 hours before testing 35 the panel in an environmental cycling test.
~ WO 9~118844 2 1 7 8 3 4 0 r~
The test used in the environmental cycling test i5 General Motors Engineering Standards Test Number GM9505P (July, 1987), incorporated herein by reference, Cycle D, except Cycle 6 is as shown below. The cycles 5 consist of (1) 24 hours in humidity at 38C; (2) 4 hours at 85C, then cooled to room temperature; (3) 17 hours at 85C; (4) 7 days at 70C; (5) 4 hours at -30C; (6) 100 hours at 70C. The panel is then e~Am;nF~d for r~ AminAtion of the tape from each of the 10 depressions on the panel. Pass (P) indicates that the tape remained adhered to the depression in the panel after aging and Fail (F) indicates that the tape popped off of the depression in the panel. It is preferred that the tape of the invention passes at least the 15%
15 depression after environmental cycling.
FOGGING TEST (TEST METHOD B) This test is a measure of the tendency of the sheet material to produce a light scattering film (or 20 fogging) on a glass surface. The procedure used is General Motors Engineering Standard Test Number G~9305P
(January, 1992) Type A, incorporated herein by reference, in which a clean glass plate is placed in a beaker with the te5t material, sealed, and heated at 25 85C. Any volatile materials will c~nrl~n~e on the surface of the plate and fog the plate. The reflectance of the fogged plate is expressed as a percentage of the clean plate and is reported as the fogging number. The fogging number is preferably 30 greater than 80%.
TENSILE STRENGTH
r The tensile strength is determined according to ASTM D1682-64 using a sample width of 2 . 5 cm, a gauge 35 length of 2.5 cm, and a crosshead speed of 25 cm/min.
Results are shown in kiloPascals.
_g_ WO g5118844 . 2 17 8 3 4 0 r~ c ~
ELONGATION AT BREAK
The percentage elongation at break is de~Prm;nl~cl according to ASTM D1682-64 using a 5ample width of 2. 5 cm, a gauge length of 2 . 5 cm, and a crosshead speed of 5 2 5 cm/min .
PERCENTAGE RECOVERY
The percentage recovery is conducted at room temperature. A 2 . 54 cm by 10 cm long strip o~ sheet 10 material is stretched to 15 cm (50% elongation), held f or 1 minute, and then the ends of the strip are released. After 10 minutes, the length of the strip i5 measured and the 96 recovery is calculated by the f ollowing f ormula:
rY - X) - (Z - X) x 100 = % RECOVERY
Y -- X
wherein X = initial length Y = length stretched to 50% elongation Z = length af ter ten minutes PEEL ADHESION
This test measures the 90 peel adhesion of the adhesive on glass, acrylonitrile butadiene styrene (ABS), and polypropylene panels. An adhesive tape is 25 prepared by coating or laminating the adhesive to a 0. 038 mm thick polyester film. The adhesive tape is cut into a strip measuring 1.27 cm by 15.2 cm and adhered to the test panel and rolled down with one pass of a 2 . 0 kilogram roller at a speed of about 30. 5 cm 30 per minute. The sample is conditioned at 21C for 24 hours bef ore testing . The panel i5 then mounted in a tensile tester so that the tape is removed at a 90 angle at a speed of 0.1016 cm per minute, and the test results are recorded in Newtons/decimeter (N/dm).
Prior to application of the adhesive tape, the glass and polypropylene panels are cleaned by washing with diacetone alcohol, wiping dry with a KleenexTY
Wo95118844 s 2 1 7834 0 P(~ 'O~ i brand tis5ue, washing 3 times with methyl ethyl ketonc and drying with a tissue. The ABS panels are cleaned in a similar manner with diacetone alcohol, but washing 3 times with heptane.
The ABS panels are White Smooth Finish ABS (Number 167150, from Cadillac Plastics).
Example An acrylate syrup was prepared by mixing 93 . 5 10 parts IOA (isooctyl acrylate), 6.5 parts AA (acrylic acid), and 0 . 04 parts photoinitiator (Irgacure~184 available from Ciba Geigy), and exposing the mixture to fluorescent black lights in a nitrogen atmosphere to form a syrup having a viscosity of about 3000 15 centipoise. A pressure sensitive adhesive composition was prepared by adding to 100 parts of syrup an additional O . 35 parts Irgacure~184, O .15 parts cross-1 inker ( 2, 4 -bi s ( trichl oromethy 1 ) - 6 - ( 4 -methoxypheny 1 ) -s -triazine), 10 parts of a glycerine rosin ester 20 tackifier (Foraln'85 available from Hercules, Inc. ) .
The composition was knife-coated to a thickness of 0. lZ7 mm onto a release treated Kraft paper and cured in a nitrogen ai ~srh~re with fluorescent black lamps having 90% of the emission spectra between 300 and 400 25 nm (nanometers) and a maximum at 351 nm and an intensity of about O . 7 milliwatts/square centimeter to form a pressure sensitive adhesive transfer tape. The total energy used to make the adhesive tape was 357 milliJoules/square centimeter as measured with a llV
30 Integrating Radiometer, Model UR365CHI from E.I.T.
A nonwoven tape construction was prepared by using a thermoplastic polyurethane (Morthane PS440-200, available from Morton International of Seabrook, NH) with 2 percent by weight black colorant (BASF Euthelyn 35 Black 00-6005 C-4, available from BASF) and a process similar to that described in Wente, Van A., "Superfine _ 4 2 t 7 8 3 4 0 E ~ ~ ~
Thermoplastic Fibers" in Industrial Engineering Chemistry, Vol. 48, pages 1342 et se~a (1956), or in Report No. 4364 of the Naval Research Laboratories, published May 25, 1954, entitled "Manufacture of 5 Superfine Organic Fibers" by Wente, Van A., Boone , C . D ., and Fluharty , E . L ., except that the melt blowing die had smooth surfaced orifices (10/cm) with a 5 :1 length to diameter ratio . The die temperature was maintained between 235C and 239C, and the polymer 10 throughput was 179 gm/hr/cm die width, and the fibers were deposited onto the pressure sensitive adhesive transfer tape. The thermoplastic material was extruded through the die into a high velocity stream of heated air (temperature was about 230C and the air ~resz.--L~
15 was 150 kPa) which drew out and attenuated the f ibers prior to complete solidification so that the fibers were bonded to each other to form a coherent nonwoven web with a basis weight of 125 . 9 grams/square meter.
The tape had a tensile strength of 5,964 20 kiloPa6cals, an elongation at break of 400%, and a percentage recovery of 92%.
Two samples of the tape was tested in the stress panel test with enviL, ~,1 aging. Both samples passed the 15% depression, and one of the samples 25 passed the 2596 depre6sion, with only slight lifting on the edges of the other 25% sample. The average fogging number for the tape was 93.
FIELD OF THE INVENTION
This invention relate6 to a PL ~:S~UL e: sensitive 5 adhesive tape for cushioning adjacent components to reduce the noise caused by the 5urfaces of the components rubbing together.
BA~iK~UNU OF THE INvENTION
There are many industrial and automotive applications where ~ ts are assembled in close proximity to each other such that when the ~ e1~s are subjected to vibrations, they create annoying noises such as rattles and squeaks as the components 15 rub against each other. Products that are currently available on the market to reduce or ~,u~L eSS these noises include felt, flocked cloth, velvet, and velour which may have a layer of a ~re s_uL~ sensitive adhesive . These materials f ind limited use in that all 20 of these materials are relatively thick and do not conform to irregularly shaped surfaces because the materials are not extensible enough. There remains a need for a conformable tape which can be applied between ^ntS to ~UE~L ~SS noises caused by 25 vibration of the _ L~.
SUM~Y OF THE INVENTION
The present invention provides a method of noise control comprising inserting between components a 30 conformable sheet material comprising an extensible web and an adhesive on at least one f ace of said web so that noise produced by the I - nts is prevented, reduced, or eliminated. The adhesive comprises the polymerization reaction product of starting materials 35 comprising: (a) a polymerizable ~_ -r t comprising at least one acrylic acid ester of a nontertiary alcohol, Wo 95/18844 2 1 7 8 3 4 ~ P~
wherein the alkyl group of said alcohol contains from l to about 14 carbon atoms and (b) a reinforcing r ^r .
The present invention also provides a conformable 5 sheet material comprising a nonwoven web and an adhesive on at least one face of said web. The adhesive comprises the polymerization reaction product of starting materials comprising a polymerizable component comprising: (a) at least one acrylic acid l0 ester of a nontertiary alcohol, wherein the alkyl group of said alcohol contains from about 4 to about 14 carbon atoms, (b) acrylic acid, (c) at least one free radical initiator, and (d) a crosslinking agent. The weight ratio of acrylic acid ester to acrylic acid is 15 from 9l:9 to 96:4. The nonwoven web comprises thermoplastic elastomeric melt blown small diameter fibers having a diameter of less than about 50 microns, the thermoplastic elastomeric small diameter fibers being selected from elastomeric polyurethanes, 20 elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one vinyl monomer, elastomeric copolymers of ethylene and at least one urethane, or elastomeric A-B-A' block copolymers, wherein A and A ' are the same or dif f erent 25 thermoplastic polymer and wherein B is an elastomeric polymer block. The sheet material prevents, reduces, or eliminates noise when placed between components.
DETAILED DESCRIPTION
3 0 In a pref erred embodiment of the invention, a conformable sheet material, having sufficient extensibility of the sheet to follow the contours of the surface and sufficient adhesive force to keep the sheet adhered tightly to the surface and resist any 35 d~hrnllin~ that may occur as recovery of the sheet occurs, is applied over a curved or irregularly shaped ~ Wo 95118844 2 17 8 3 4 0 r~l,u~
surface of a first c~ -n~t. A second - ^nt is then assembled adjacent to the first ~ -nt such that the sheet material prevents the surface of the first c -nt from contacting the surface of the 5 second , ont when the components are subj ected to vibration, and any noises that would be caused from rubbing of the f irst component on the second c~ -n~nt are prevented, ~liminated, or reduced.
As used herein, conformable refers to a sheet 10 material which can be stretched or extended so that the sheet closely follows the contours of a curved or an irregularly shaped surface.
The sheet material useful in the practice of the invention includes an extensible web having a pressure 15 sensitive adhesive on at least one major surface of the web. The term extensible, as used herein, is ~yllGIIy ~ with stretchable, and refers to a web which can be stretched or elongated at least 5% under a force of about 1.2 Newtons/100 mm, e.g., a 10.0 cm long sheet 20 can be stretched to at least 10.5 cm. The amount of stretch that is useful depends upon the shape of the surface to be covered. A surface with large smooth curves will require less stretch for a sheet material to conform well, e.g., about 5% to 10% stretch. For 25 ~urfaces having small irregularities and intricate contours, the web can be stretched to at least 30%, and preferably, to greater than 100%, and more preferably greater than 200%.
The preferred sheet material is also elastic. As 30 used herein, elastic refers to the ability of a material to be stretched or extended, and to recover to a length less than the stretched length when the f orce to stretch the material is released . A pref erred elastic material will have a percent recovery of at 35 least 109~, e.g., when a 10.0 cm long web is stretched 50% to a length of 15 cm and released, the web will W0 95/18844 2 1 7 8 3 4 0 r~
recover to a length less than 14 . 5 cm. More preferably, the material will have a percent recovery of at least 25%, and most preferably, at least 80%.
Nebs useful in the practice of the invention 5 include extensible woven fabrics, elastic woven fabrics such as those sold under the trAfl~nAr^- of Lycra and spandex, extensible nonwoven f abrics, elastic nonwoven fabrics, extensible films, elastic films such as polyurethane films, and the like.
In the practice of the invention, the elastlc web i5 preferably a nonwoven web having a basis weight of about 80 to 150 grams per square meter and an elongation at break of at least 250%, and more preferably, more than 300%. It is also desirable to 15 have a tensile strength sufficient to allow the sheet material to be unwound from a roll and applied to the surf ace without breaking .
The nonwoven web is formed from elastomeric thermoplastic materials that can be formed into 2 0 elastomeric microf ibers having a f iber diameter greater than 1 micron and less than about 50 microns.
Preferably, the fiber diameters range from about 2 to 30 microns, and most preferably, from about 3 to 15 micronS .
Elastomeric thermoplastic materials that are suitable in forming the fibers of the no.,.:vvt:ll of the invention include elastomeric polyurethanes, elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one 30 vinyl monomer, elastomeric copolymers of ethylene and at least one urethane monomer, and elastomeric A-B-A' block copolymers wherein A and A' are the same or different thermoplastic polymer blocks and B is an elastomeric polymer block. Typically, A and A' are 35 styrenic moieties, and B can be polyisoprene, polybutadiene, and the like. The elastomeric ~ WO95/18844 2 1 78340 ~ c~ ~
polye6ters and elastomeric polyamides include co-polyesters (such as polyetherester) and co-polyamides.
The nonwoven web may include non-elastomeric fibers made from materials including polyethylene, 5 polyester, or polypropylene. The non-elastomeric material may also be co-extruded with an elastomeric material to form a bi . ^nt or layered fiber. A
bi-~ t fiber may include from 0 to about 70 percent, and pref erably about 5 0 to 7 0 percent, non-10 elastomeric material.
The fibers of the nonwoven web may further includefillers, dyes, pigments, and the like, in suitable amounts as long as they do not deleteriously affect the desired properties of the nonwoven web.
Suitable methods of making the nonwoven webs by a melt blown process are described by Wente , Van A ., "Superfine Thermoplastic Fibers" in Industrial Engineering Chemistry, Vol. 48, pages 1342 et seq (1956), or in Report No. 4364 of the Naval Research 20 Laboratories, published May 25, 1954, entitled "~lanufacture of Superfine Organic Fibers" by Wente, Van A., Boone, C.D., and Fluharty, E.L., except that a drilled die is preferably used. The thermoplastic elastomeric materials are extruded 25 through the die into a high velocity stream of heated air which draws out and attenuates the f ibers prior to their solidif ication and collection . The f ibers are collected in random fashion, such as on a perforated screen cylinder, prior to complete fiber solidification 30 so that the fibers are able to bond to one another to form a coherent web without the use of additional binders . The f ibers may be blown directly onto an . adhesive film on a carrier web to form the sheet.
Nonwoven webs may also be f ormed by procesSes 35 known in the art including air laying, spunbonding, spunlace, stitchbonding, and needle punching. The Wo 95/18844 2 1 7 8 3 4 0 1 ~
nonwoven web6 may be coated with adhesive by any known process including laminating to a transf er tape, roll coating or knife coating the adhesive onto the nonwoven, and spraying the adhesive onto the nonwoven.
The preferred adhesives in the practice of the invention include tackified cross-linked acrylate adhesives. Such acrylate adhesives are the polymerization reaction products of one or more monofunctional methacrylic or acrylic acid esters of lO non-tertiary alcohols having from l to 14 carbon atoms and a reinf orcing , -n~ . Pref erably, the esters have from 4 to 14 carbon atoms. Examples of suitable acrylic acid esters include 2-ethylhexyl acrylate, n-butyl acrylate, isooctyl acrylate, isononyl acrylate, 15 decyl acrylate, dodecyl acrylate, hexyl acrylate, and mixtures thereof . Pref erred acrylates include isooctyl acrylate .
~ he reinforcing . nl -r is a monomer having a higher homopolymer glass transition temperature than 20 the acrylate homopolymer. Suitable monomer6 include acrylic acid.
The ratio of acrylate monomers to comonomers can range from about 60 to 99 parts by weight acrylate per one hundred parts of polymer and the ~ )- ers can 25 range from about 40 to l parts. When acrylic acid is used as the comonomer, the ratio of acrylate monomers to . ~ is preferably in the range of 88 to 99 parts acrylate and 12 to l parts _ -rlf- - .
In a highly preferred P~nho~;r~nt, the acrylate is 30 used in an amount from greater than 90 to less than 97 parts by weight per one hundred parts of acrylate and ~n- -r and the ~ ~ is used in an amount of from less than lO to greater than 3 parts by weight per one hundred parts of acrylate and comonomer.
The pressure sensitive adhesive is also preferably tackif ied with a suitable tackif ier , i . e ., one which is ~ WO95/18844 ~ ~ 21 78340 P~l/u~
soluble in the monomers, and remains compatible with the polymers in the adhesive . The suitable tackif iers should exhibit no gross phase separation as evidenced by clouding of the D or syrup upon addition of 5 the tackif ier, or by blooming of the tackif ier in the adhesive. A suitable tackifier is a glycerine rosin ester sold by Hercules , Inc ., under the tradename of ForalT"85. The tackifier is preferably used in amounts less than about 25 parts of tackifier per one hundred 10 parts total of acrylate and comonomer, and more pref erably, less than 15 parts .
Cross-linking agents are also preferably included in the ~aSDULe: sensitive adhesive to improve the cohesive strength of the adhesive. Useful cross-15 linking agents are generally known in the art andinclude multi-functional acrylates such as 1, 6-h~Y;~nP~ i oldiacrylate and trimethylolpropane triacrylate, substituted triazines such as 2, 4-bis (trichloromethyl) -6- (4-methoxyphenyl) -s-20 triazine, metal acetyl acetonates, ortho alkyltitanates, peroxides, amide resins, m=~ minC~ resins, and the like. The acrylate adhesives may be prepared by methods known in the adhesive industry such as solvent polymerization, radiation polymerization, and 25 the like using a suitable initiator. Useful initiators include 2, 2 ' -azobis ( isobutyronitrile) and photoinitiators available from Ciba-Geigy under the Igracure tradename. In a preferred e ~ ~;r-nt~ the adhesive is the reaction product of r~n~ D
30 polymerized by ultraviolet radiation.
For certain interior applications, such as in car interiors, the pressure sensitive adhesive is selected such that it has a very low amount of volatile material and passes the Fogging Test described below.
35 The invention is further illustrated in the following non-limiting examples.
WO 9~/18844 2 1 7 8 3 4 0 P~
TEST METHODS
STRESS PANEL TEST (TEST METHOD A) Thi5 test is a measure of performance of the sheet material when it is stretched 5%, 10%, 15%, and 25%
5 when aged at the elevated temperature cycling test -described herein. The test panel is prepared by making rounded depressions across a 10 cm by 30 . 5 cm metal panel by laying a cylinder across the panel and pressing the panel against the cylinder in four 10 different areas to obtain rounded depressions having dimensions of 0 .15 cm deep by 1. 5 cm wide gap above the depression (5%), 0.4 cm deep by 2.0 cm wide gap (10%), 0 . 5 cm deep by 2 . 2 cm wide gap ( 15% ), and 0 . 7 cm deep by 2.4 cm wide gap (25%). The dimensions of the 15 depressions are such that when a sheet is laid across the depression and stretched into the depression, the sheet is stretched to the percentage indicated above, i.e., 5%, 10%, etc. The panel is then coated with White High solids Enamel WAEM 3967 available from PPG
20 Industries and cured at 121C for 35 minutes.
The painted panel is then cleaned by wiping with a solution of 50% isopropanol and 50% water and wiping dry with a lint free cloth. A strip of tape measuring 2 . 54 cm by 25 . 4 cm is placed across the length of the 25 panel over the depressions and smoothed down in the bridge areas of the panel with a PA-l plastic applicator (available from Minnesota Mining &
Manufacturing Co. ) The panel is then placed in an oven at 70C for one minute. While the panel is still in 30 the oven, the tape is pressed into each depression on the panel with thumb pressure. The panel is then removed from the oven and the applicator is run across the tape in the depressions. The prepared panel is then conditioned at 21C for 72 hours before testing 35 the panel in an environmental cycling test.
~ WO 9~118844 2 1 7 8 3 4 0 r~
The test used in the environmental cycling test i5 General Motors Engineering Standards Test Number GM9505P (July, 1987), incorporated herein by reference, Cycle D, except Cycle 6 is as shown below. The cycles 5 consist of (1) 24 hours in humidity at 38C; (2) 4 hours at 85C, then cooled to room temperature; (3) 17 hours at 85C; (4) 7 days at 70C; (5) 4 hours at -30C; (6) 100 hours at 70C. The panel is then e~Am;nF~d for r~ AminAtion of the tape from each of the 10 depressions on the panel. Pass (P) indicates that the tape remained adhered to the depression in the panel after aging and Fail (F) indicates that the tape popped off of the depression in the panel. It is preferred that the tape of the invention passes at least the 15%
15 depression after environmental cycling.
FOGGING TEST (TEST METHOD B) This test is a measure of the tendency of the sheet material to produce a light scattering film (or 20 fogging) on a glass surface. The procedure used is General Motors Engineering Standard Test Number G~9305P
(January, 1992) Type A, incorporated herein by reference, in which a clean glass plate is placed in a beaker with the te5t material, sealed, and heated at 25 85C. Any volatile materials will c~nrl~n~e on the surface of the plate and fog the plate. The reflectance of the fogged plate is expressed as a percentage of the clean plate and is reported as the fogging number. The fogging number is preferably 30 greater than 80%.
TENSILE STRENGTH
r The tensile strength is determined according to ASTM D1682-64 using a sample width of 2 . 5 cm, a gauge 35 length of 2.5 cm, and a crosshead speed of 25 cm/min.
Results are shown in kiloPascals.
_g_ WO g5118844 . 2 17 8 3 4 0 r~ c ~
ELONGATION AT BREAK
The percentage elongation at break is de~Prm;nl~cl according to ASTM D1682-64 using a 5ample width of 2. 5 cm, a gauge length of 2 . 5 cm, and a crosshead speed of 5 2 5 cm/min .
PERCENTAGE RECOVERY
The percentage recovery is conducted at room temperature. A 2 . 54 cm by 10 cm long strip o~ sheet 10 material is stretched to 15 cm (50% elongation), held f or 1 minute, and then the ends of the strip are released. After 10 minutes, the length of the strip i5 measured and the 96 recovery is calculated by the f ollowing f ormula:
rY - X) - (Z - X) x 100 = % RECOVERY
Y -- X
wherein X = initial length Y = length stretched to 50% elongation Z = length af ter ten minutes PEEL ADHESION
This test measures the 90 peel adhesion of the adhesive on glass, acrylonitrile butadiene styrene (ABS), and polypropylene panels. An adhesive tape is 25 prepared by coating or laminating the adhesive to a 0. 038 mm thick polyester film. The adhesive tape is cut into a strip measuring 1.27 cm by 15.2 cm and adhered to the test panel and rolled down with one pass of a 2 . 0 kilogram roller at a speed of about 30. 5 cm 30 per minute. The sample is conditioned at 21C for 24 hours bef ore testing . The panel i5 then mounted in a tensile tester so that the tape is removed at a 90 angle at a speed of 0.1016 cm per minute, and the test results are recorded in Newtons/decimeter (N/dm).
Prior to application of the adhesive tape, the glass and polypropylene panels are cleaned by washing with diacetone alcohol, wiping dry with a KleenexTY
Wo95118844 s 2 1 7834 0 P(~ 'O~ i brand tis5ue, washing 3 times with methyl ethyl ketonc and drying with a tissue. The ABS panels are cleaned in a similar manner with diacetone alcohol, but washing 3 times with heptane.
The ABS panels are White Smooth Finish ABS (Number 167150, from Cadillac Plastics).
Example An acrylate syrup was prepared by mixing 93 . 5 10 parts IOA (isooctyl acrylate), 6.5 parts AA (acrylic acid), and 0 . 04 parts photoinitiator (Irgacure~184 available from Ciba Geigy), and exposing the mixture to fluorescent black lights in a nitrogen atmosphere to form a syrup having a viscosity of about 3000 15 centipoise. A pressure sensitive adhesive composition was prepared by adding to 100 parts of syrup an additional O . 35 parts Irgacure~184, O .15 parts cross-1 inker ( 2, 4 -bi s ( trichl oromethy 1 ) - 6 - ( 4 -methoxypheny 1 ) -s -triazine), 10 parts of a glycerine rosin ester 20 tackifier (Foraln'85 available from Hercules, Inc. ) .
The composition was knife-coated to a thickness of 0. lZ7 mm onto a release treated Kraft paper and cured in a nitrogen ai ~srh~re with fluorescent black lamps having 90% of the emission spectra between 300 and 400 25 nm (nanometers) and a maximum at 351 nm and an intensity of about O . 7 milliwatts/square centimeter to form a pressure sensitive adhesive transfer tape. The total energy used to make the adhesive tape was 357 milliJoules/square centimeter as measured with a llV
30 Integrating Radiometer, Model UR365CHI from E.I.T.
A nonwoven tape construction was prepared by using a thermoplastic polyurethane (Morthane PS440-200, available from Morton International of Seabrook, NH) with 2 percent by weight black colorant (BASF Euthelyn 35 Black 00-6005 C-4, available from BASF) and a process similar to that described in Wente, Van A., "Superfine _ 4 2 t 7 8 3 4 0 E ~ ~ ~
Thermoplastic Fibers" in Industrial Engineering Chemistry, Vol. 48, pages 1342 et se~a (1956), or in Report No. 4364 of the Naval Research Laboratories, published May 25, 1954, entitled "Manufacture of 5 Superfine Organic Fibers" by Wente, Van A., Boone , C . D ., and Fluharty , E . L ., except that the melt blowing die had smooth surfaced orifices (10/cm) with a 5 :1 length to diameter ratio . The die temperature was maintained between 235C and 239C, and the polymer 10 throughput was 179 gm/hr/cm die width, and the fibers were deposited onto the pressure sensitive adhesive transfer tape. The thermoplastic material was extruded through the die into a high velocity stream of heated air (temperature was about 230C and the air ~resz.--L~
15 was 150 kPa) which drew out and attenuated the f ibers prior to complete solidification so that the fibers were bonded to each other to form a coherent nonwoven web with a basis weight of 125 . 9 grams/square meter.
The tape had a tensile strength of 5,964 20 kiloPa6cals, an elongation at break of 400%, and a percentage recovery of 92%.
Two samples of the tape was tested in the stress panel test with enviL, ~,1 aging. Both samples passed the 15% depression, and one of the samples 25 passed the 2596 depre6sion, with only slight lifting on the edges of the other 25% sample. The average fogging number for the tape was 93.
Claims (12)
1. A method of noise control comprising inserting between components a conformable sheet material comprising an extensible web and an adhesive on at least one face of said web;
wherein said adhesive comprises the polymerization reaction product of starting materials comprising:
(a) a polymerizable component comprising at least one acrylic acid ester of a nontertiary alcohol, wherein the alkyl group of said alcohol contains from 1 to about 14 carbon atoms; and (b) a reinforcing comonomer;
so that noise produced by said components is prevented, reduced, or eliminated.
wherein said adhesive comprises the polymerization reaction product of starting materials comprising:
(a) a polymerizable component comprising at least one acrylic acid ester of a nontertiary alcohol, wherein the alkyl group of said alcohol contains from 1 to about 14 carbon atoms; and (b) a reinforcing comonomer;
so that noise produced by said components is prevented, reduced, or eliminated.
2. A method of claim 1, wherein said extensible web is a nonwoven web.
3. A method of claim 1, wherein said adhesive is a pressure sensitive adhesive.
4. A method of claim 1, wherein said sheet material remains adhered to an ABS substrate after being elongated 15 percent and applied to said substrate.
5. A method of claim 1, wherein said sheet material remains adhered to a polypropylene substrate after being elongated 15 percent and applied to said substrate.
6. A method of claim 1, wherein said sheet material remains adhered to a substrate panel with a high solids automotive enamel paint described in Test Method A thereon, after being elongated 15 percent and applied to said substrate, and remains adhered after aging according to Test Method A.
7. A method of claim 1, wherein said alkyl group of said alcohol contains from about 4 to about 14 carbon atoms, and said reinforcing comonomer is acrylic acid.
8. A method of claim 1, wherein said starting materials further comprise an effective amount of a free radical photoinitiator, and said starting materials are polymerized by ultraviolet radiation.
9. A method of claim 2, wherein said nonwoven web comprises thermoplastic elastomeric melt blown small diameter fibers having a diameter of less than about 50 microns, the thermoplastic elastomeric small diameter fibers being selected from elastomeric polyurethanes, elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one vinyl monomer, elastomeric copolymers of ethylene and at least one urethane, or elastomeric A-B-A' block copolymers, wherein A and A' are the same or different thermoplastic polymer and wherein B is an elastomeric polymer block.
10. A method of claim 9, wherein said nonwoven web comprises elastomeric polyurethane or an elastomeric polyurethane/polyolefin copolymer.
11. A method of claim 1, wherein said sheet material passes the fogging test set forth in Test Method B.
12. A conformable sheet material comprising a nonwoven web and an adhesive on at least one face of said web;
wherein said adhesive comprises the polymerization reaction product of starting materials comprising a polymerizable component comprising: (a) at least one acrylic acid ester of a nontertiary alcohol, wherein the alkyl group of said alcohol contains from about 4 to about 14 carbon atoms, (b) acrylic acid, (c) at least one free radical initiator, and (d) a crosslinking agent;
wherein the weight ratio of acrylic acid ester to acrylic acid is from 91:9 to 96:4;
wherein said nonwoven web comprises thermoplastic elastomeric melt blown small diameter fibers having a diameter of less than about 50 microns, the thermoplastic elastomeric small diameter fibers being selected from elastomeric polyurethanes, elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one vinyl monomer, elastomeric copolymers of ethylene and at least one urethane, or elastomeric A-B-A' block copolymers, wherein A and A' are the same or different thermoplastic polymer and wherein B is an elastomeric polymer block;
and wherein said sheet material prevents, reduces, or eliminates noise when placed between components.
wherein said adhesive comprises the polymerization reaction product of starting materials comprising a polymerizable component comprising: (a) at least one acrylic acid ester of a nontertiary alcohol, wherein the alkyl group of said alcohol contains from about 4 to about 14 carbon atoms, (b) acrylic acid, (c) at least one free radical initiator, and (d) a crosslinking agent;
wherein the weight ratio of acrylic acid ester to acrylic acid is from 91:9 to 96:4;
wherein said nonwoven web comprises thermoplastic elastomeric melt blown small diameter fibers having a diameter of less than about 50 microns, the thermoplastic elastomeric small diameter fibers being selected from elastomeric polyurethanes, elastomeric polyesters, elastomeric polyamides, elastomeric copolymers of ethylene and at least one vinyl monomer, elastomeric copolymers of ethylene and at least one urethane, or elastomeric A-B-A' block copolymers, wherein A and A' are the same or different thermoplastic polymer and wherein B is an elastomeric polymer block;
and wherein said sheet material prevents, reduces, or eliminates noise when placed between components.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17759694A | 1994-01-05 | 1994-01-05 | |
| US08/177,596 | 1994-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2178340A1 true CA2178340A1 (en) | 1995-07-13 |
Family
ID=22649221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002178340A Abandoned CA2178340A1 (en) | 1994-01-05 | 1995-01-04 | Conformable isolation tape |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0738308A1 (en) |
| JP (1) | JPH09507556A (en) |
| KR (1) | KR970700740A (en) |
| CN (1) | CN1137804A (en) |
| CA (1) | CA2178340A1 (en) |
| WO (1) | WO1995018844A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19807752A1 (en) | 1998-02-24 | 1999-08-26 | Beiersdorf Ag | Non-fogging tape |
| DE102004028825B4 (en) | 2004-06-15 | 2022-07-14 | Coroplast Fritz Müller Gmbh & Co. Kg | Wiring harness and use of a technical tape |
| WO2021054311A1 (en) * | 2019-09-19 | 2021-03-25 | デンカ株式会社 | Binding tape |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU609963B2 (en) * | 1988-05-13 | 1991-05-09 | Minnesota Mining And Manufacturing Company | Elastomeric adhesive and cohesive materials |
| JPH02163183A (en) * | 1988-12-16 | 1990-06-22 | Shinko Kagaku Kogyo Kk | Silent type binding tape |
| JPH0453890A (en) * | 1990-06-20 | 1992-02-21 | Shinko Kagaku Kogyo Kk | Pressure-sensitive tape for bundling wire harnesses |
| CA2067969A1 (en) * | 1991-05-30 | 1992-12-01 | Chung I. Young | Method for making structured suspension psa beads |
-
1995
- 1995-01-04 CA CA002178340A patent/CA2178340A1/en not_active Abandoned
- 1995-01-04 EP EP95906744A patent/EP0738308A1/en not_active Withdrawn
- 1995-01-04 WO PCT/US1995/000027 patent/WO1995018844A1/en not_active Application Discontinuation
- 1995-01-04 JP JP7518543A patent/JPH09507556A/en active Pending
- 1995-01-04 CN CN95191114A patent/CN1137804A/en active Pending
-
1996
- 1996-07-01 KR KR1019960703539A patent/KR970700740A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1137804A (en) | 1996-12-11 |
| WO1995018844A1 (en) | 1995-07-13 |
| KR970700740A (en) | 1997-02-12 |
| EP0738308A1 (en) | 1996-10-23 |
| JPH09507556A (en) | 1997-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |