CA2172636A1 - Flexible cube-corner retroreflective sheeting - Google Patents

Flexible cube-corner retroreflective sheeting

Info

Publication number
CA2172636A1
CA2172636A1 CA002172636A CA2172636A CA2172636A1 CA 2172636 A1 CA2172636 A1 CA 2172636A1 CA 002172636 A CA002172636 A CA 002172636A CA 2172636 A CA2172636 A CA 2172636A CA 2172636 A1 CA2172636 A1 CA 2172636A1
Authority
CA
Canada
Prior art keywords
cube
retroreflective sheeting
body portion
corner retroreflective
flexible cube
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.)
Granted
Application number
CA002172636A
Other languages
French (fr)
Other versions
CA2172636C (en
Inventor
Kenneth L. Smith
Tzu-Li J. Huang
James C. Coderre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Kenneth L. Smith
Tzu-Li J. Huang
James C. Coderre
Minnesota Mining And Manufacturing Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kenneth L. Smith, Tzu-Li J. Huang, James C. Coderre, Minnesota Mining And Manufacturing Company filed Critical Kenneth L. Smith
Publication of CA2172636A1 publication Critical patent/CA2172636A1/en
Application granted granted Critical
Publication of CA2172636C publication Critical patent/CA2172636C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
    • G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/148—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length characterised by the shape of the surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S359/00—Optical: systems and elements
    • Y10S359/90—Methods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24521—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/252—Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material

Abstract

A retroreflective article (10) has a body portion (14) and a multiple of cube-corner elements (12) that project from a rear side (20) of the body portion (14). The body portion (14) includes a body layer (18) that contains a light-transmissible polymeric material having an elastic modulus less than 7 x 108 pascals. The cube-corner elements (12) contain a light transmissible polymeric material having an elastic modulus greater than 16 x 108 pascals. A
retroreflective article of this construction can be highly flexed while maintaining good retroreflective performance.
CA002172636A 1993-10-20 1994-10-20 Flexible cube-corner retroreflective sheeting Expired - Lifetime CA2172636C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/139,433 US5450235A (en) 1993-10-20 1993-10-20 Flexible cube-corner retroreflective sheeting
US08/139433 1993-10-20
PCT/US1994/011943 WO1995011466A1 (en) 1993-10-20 1994-10-20 Flexible cube-corner retroreflective sheeting

Publications (2)

Publication Number Publication Date
CA2172636A1 true CA2172636A1 (en) 1995-04-27
CA2172636C CA2172636C (en) 2006-01-24

Family

ID=22486629

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002172636A Expired - Lifetime CA2172636C (en) 1993-10-20 1994-10-20 Flexible cube-corner retroreflective sheeting

Country Status (11)

Country Link
US (5) US5450235A (en)
EP (1) EP0724731B1 (en)
JP (1) JP3623506B2 (en)
CN (1) CN1040694C (en)
AT (1) ATE189316T1 (en)
AU (1) AU676619B2 (en)
CA (1) CA2172636C (en)
DE (1) DE69422823T2 (en)
DK (1) DK0724731T3 (en)
ES (1) ES2141264T3 (en)
WO (1) WO1995011466A1 (en)

Families Citing this family (234)

* Cited by examiner, † Cited by third party
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US7185993B2 (en) 2007-03-06
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WO1995011466A1 (en) 1995-04-27
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AU7983494A (en) 1995-05-08
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US20070014011A1 (en) 2007-01-18
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US7568807B2 (en) 2009-08-04
EP0724731B1 (en) 2000-01-26
US5988820A (en) 1999-11-23
US6350035B1 (en) 2002-02-26
ATE189316T1 (en) 2000-02-15
US20020126382A1 (en) 2002-09-12
JP3623506B2 (en) 2005-02-23
US5450235A (en) 1995-09-12
CA2172636C (en) 2006-01-24
CN1133635A (en) 1996-10-16

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