GB2116184A - Infra-red reflective camouflage material - Google Patents

Infra-red reflective camouflage material Download PDF

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Publication number
GB2116184A
GB2116184A GB08206225A GB8206225A GB2116184A GB 2116184 A GB2116184 A GB 2116184A GB 08206225 A GB08206225 A GB 08206225A GB 8206225 A GB8206225 A GB 8206225A GB 2116184 A GB2116184 A GB 2116184A
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GB
United Kingdom
Prior art keywords
infra
camouflage
red
red light
camouflage material
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
GB08206225A
Other versions
GB2116184B (en
Inventor
Peter John Mellersh
Alexander Craig
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.)
BTR PLC
Original Assignee
BTR PLC
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 BTR PLC filed Critical BTR PLC
Priority to GB08206225A priority Critical patent/GB2116184B/en
Publication of GB2116184A publication Critical patent/GB2116184A/en
Application granted granted Critical
Publication of GB2116184B publication Critical patent/GB2116184B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H3/00—Camouflage, i.e. means or methods for concealment or disguise

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

Camouflage material comprises glass fibre reinforced plastics and an infrared reflective pigment, the material reflecting 30%+/-5% of incident infra-red light. The material may be formed into pultruded tubes.

Description

SPECIFICATION Infra-red reflective camouflage material This invention relates to camouflage material of glass fibre reinforced plastics.
Conventional camouflage structural components are made of painted metal, for instance camouflage poles for supporting netting are generally made of painted aluminium. Such conventional components suffer from the disadvantage that the paint tends to come off, particularly during handling -- making constant repainting necessary.
It is a requirement of camouflage that it is not readily distinguished from foliage by infra-red detectors and it must therefore have comparable infra-red reflectivity to foliage. Foliage generally reflects 3035% of infra-red light, and conventional camouflage paints therefore have substantially similar reflectivity.
According to a first aspect of the present invention there is provided a camouflage material, comprising glass fibre reinforced plastics and an infra-red reflective pigment, the material reflecting 30% + 5% of incident infra-red light.
According to a second aspect of the present invention there is provided a method of making glass fibre reinforced plastics camouflage material, wherein an infra-red reflective pigment is incorporated into the plastics resin to give the material infra-red reflectivity such that 30% + 5% of incident infra-red light is reflected.
The reflectivity of the material of the invention desirably applies to infra-red light at all wavelengths between 750 nm and 900 nm with respect to barium sulphate.
The method of the invention may be applied to the manufacture of pultruded camouflage poles for supporting camouflage netting. In this method the pigment is mixed into a resin in a predetermined proportion and the resin is applied to the glass which becomes saturated and is subsequently pulled through the heated die to cure and form pultruded tube.
The invention may also be applied to moulded mushrooms for supporting camouflage netting.
These mushrooms are manufactured by the hot press moulding process from polyester dough moulding compound incorporating the infra-red reflecting pigment.
The proportion of pigment required depends on the type of pigment chosen and may be determined experimentally. The pigment used may be any suitable infra-red reflective pigment, as used in conventional camouflage paints. Of course, not all known pigments are suitable for use in glass fibre reinforced plastics and pigments should be tested for their suitability.
An embodiment of the invention is more particularly described in the following Examples.
EXAMPLE 1 The reinforcement for GRP pultruded camouflage poles consists of two layers of 280 g/m2 woven rovings sandwiching one layer of 450 g/m2 continuous filament mat. Also incorporated are unidirectional fibres on the outside consisting of 'spun rovings' and 'mock spun rovings'.
The resin system used has the following compositions: % by weight Stypol 40-6034 polyester resin 76.45 Stypol 40-7401 polyester resin 16.15 Zelec UN alcohol phosphate 1.10 * Pigment 5.00 Topanal 0 butylated hydroxy toluene 0.10 t-butyl peroctoate 0.30 t-butyl perbenzoate 0.90 * Pigment type and quantity will be variable according to nature of material as a whole.
EXAMPLE 2 Dough moulding compound is formulated from the following: % by weight Cellobond A 711/34 polyester resin 22.5 Benzoyl peroxide paste 1.0 Dietertiary butyl peroxide 0.3 Alumina trihydrate FRF 80 10.0 Zinc stearate 1.5 % by weight Stearine-Stearic Acid 0.5 Polyethylene Powder Alkathane 1.8 Polyethylene Powder Coathylene 1.8 X9 10 Polystyrene Beads 3.6 Microdol Extra Calcium Magnesium Carbonate 37.0 Borosilicate glass fibre 20.0 * Pigment * Pigment type and quantity will be variable according to nature of - material as a whole.
The glass content of the GRP was 60% by weight. Although the invention has been described in relation to camouflage poles it may be used for any camouflage glass fibre reinforced structure.

Claims (11)

1. A camouflage material, comprising glass fibre reinforced plastics and an infra-red reflective pigment, the material reflecting 30% + 5% of incident infra-red light
2. A camouflage material as claimed in claim 1 wherein the incident infra-red light is light at all wavelengths between 750 nm and 900 nm with respect to barium sulphate.
3. A camouflage material as claimed in claim 1 or claim 2 substantially as hereinbefore described.
4. A camouflaged article whenever comprising material as claimed in any one of claims 1,2 or 3.
5. A pultruded pole whenever comprising material as claimed in any one of claims 1,2 or 3.
6. A method of making glass fibre reinforced plastics camouflage material, wherein an infra-red reflective pigment is incorporated into the plastics resin to given the material infra-red reflectivity such that 30% + 5% of incident infra-red light is reflected.
7. A method as claimed in claim 6 wherein the incident infra-red light is light at all wavelengths between 750 nm and 900 nm with respect to barium sulphate.
8. A method as claimed in claim 6 or claim 7 further comprising the pultrusion of the camouflage material before it hardens.
9. A method as claimed in claim 8 for making a camouflage pole.
1 0. A method as claimed in claim 6 substantially as hereinbefore described.
11. A material or an article whenever made by a method as claimed in any one of claims 6 to 10.
GB08206225A 1982-03-03 1982-03-03 Infra-red reflective camouflage material Expired GB2116184B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08206225A GB2116184B (en) 1982-03-03 1982-03-03 Infra-red reflective camouflage material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08206225A GB2116184B (en) 1982-03-03 1982-03-03 Infra-red reflective camouflage material

Publications (2)

Publication Number Publication Date
GB2116184A true GB2116184A (en) 1983-09-21
GB2116184B GB2116184B (en) 1985-09-11

Family

ID=10528751

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08206225A Expired GB2116184B (en) 1982-03-03 1982-03-03 Infra-red reflective camouflage material

Country Status (1)

Country Link
GB (1) GB2116184B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005012825A2 (en) 2003-08-01 2005-02-10 Illinois Tool Works Inc. Night vision and audio signal reduction system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005012825A2 (en) 2003-08-01 2005-02-10 Illinois Tool Works Inc. Night vision and audio signal reduction system
EP1649315A2 (en) * 2003-08-01 2006-04-26 Illinois Tool Works Inc. Night vision and audio signal reduction system
EP1649315A4 (en) * 2003-08-01 2008-01-09 Illinois Tool Works Night vision and audio signal reduction system

Also Published As

Publication number Publication date
GB2116184B (en) 1985-09-11

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee