Internal Sunscreen Fabrics

Helioscreen sunscreen fabrics have been specifically developed to provide protection from the harmful elements of the sun, known as solar radiation. Solar radiation is composed of visible light, infra red and ultra violet rays. This radiation is either reflected or transformed into heat when it strikes or passes through a material like glass. The aim of sun protection is to improve interior comfort. Helioscreen sunscreens offer extremely efficient and flexible sun control, adaptable to all seasons and architectural style.

Measuring the efficiency of sunscreens

Specific tests allow comparison of the different solar protection alternatives. The Visible Transmittance (tv) and the Openess Factor (OF) are the most significant results. Each of Helioscreens fabrics has been subjected to these tests and the results are tabled to measure the effectiveness of the screen and match it to the level of control required. Different facades will require different levels of control, dependant on numerous factors including the use of the building and the direction it faces. The tests are explained below:

Tv Visible Transmittance

The visible transmittance measures the percentage of visible light coming through the fabric. A low figure shows a very efficient fabric. (The Tv is identical whether the blind is placed inside or outside the building)

OF Openness Factor

The Openness factor measures the proportion of holes in a fabric. This parameter is important to calculate the degree of visibility through the fabric. The Openness Factor is expressed as a percentage. A low OF shows that the fabric is a very close weave. This factor is determined with light rays therefore it varies slightly with the colouring of the fabric.

Ts Solar Transmittance

This factor measures the proportion of solar energy transmitted through a fabric. It is expressed as a percentage and for the fabric alone. A low figure indicates a good filtration of solar energy by the fabric.

Rs Solar Reflectance

This factor measures the proportion of solar energy reflected by the fabric. It is expressed as a percentage and for the fabric alone. A high figure indicates a good reflection of solar energy by the fabric.

As Solar Absorbance

This factor measures the proportion of solar energy absorbed by a fabric. It is expressed as a percentage and for the fabric alone. A low figure indicates a low absorption.

Heliogreen Fabric Collection

In recognition of environmental issues, the Heliogreen fabric has been compiled. These fabrics are manufactured using eco-friendly materials and methods, they have low VOC omissions and come with Greenstar Award accreditation. Their superior light and heat control qualities mean that interior air conditioning and light control systems utilize less energy.

Sunscreen - Helio 3

Basket Weave screen fabric

Composition	PVC coated fibreglass yarn, 29% fibreglass, 71% PVC
Width	2500mm
Weight	365 gsm
Openness	Average factor 3%
Thickness	0.42mm
Colour Fastness	7 blue scale
Properties	Flame Retardant (Standard NFPA 701) M2

	Ts	Rs	As	Tv
White	22.9	65.4	11.7	21.6
White/Linen	20.5	60.4	19.1	18.2
White/Pearl	16.7	53	30.3	13.9
Black/Pearl	5.7	18	76.3	5.4
Black	5.2	4.6	90.2	5.2
Bronze	4.4	7.8	87.8	4.3
Bronze/Black	4.1	6.7	89.2	4
Bronze/Grey	4.9	13.3	81.8	4.7

Sunscreen - Topscreen

Basket Weave screen fabric

Composition	PVC coated fibreglass yarn, 34% fibreglass, 66% PVC
Width	2500mm
Weight	400 gsm
Openness	Average factor 10%
Thickness	0.57mm
Colour Fastness	7 blue scale
Properties	Flame Retardant M1, B1

	Ts	Rs	As	Tv
Desert	24	55	21	22
Snow	26	62	12	25
Black	10	5	85	10
Ivory	25	59	16	24
Mink	18	41	41	14
Chestnut	15	23	62	14
Terra	14	20	66	13
Basalt	12	10	78	12

Sunscreen - Duoscreen

Satin Weave screen fabric

Composition	PVC coated fibreglass yarn, 34 fibreglass, 66% PVC
Width	2500mm
Weight	420 gsm
Openness	Average factor 4%
Thickness	0.57mm
Colour Fastness	7 – 8
Properties	Flame Retardant M1, B1

	Ts	Rs	As	Tv
Snow	23	64	13	23
Ivory	20	63	17	20
Linen	22	61	17	21
Silver	16	58	26	14
Pewter	10	48	42	9
Charcoal	5	25	70	6
Bronze Gold	5	20	75	5

Sunscreen - Sityscreen

Composition	Polymer coated glass fibre
Width	2500mm
Weight	410 gsm
Openness	Average factor 6%
Thickness	0.43mm
Coloour Fastness	6-7 blue scale
Properties	Flame Retardant 1530.3.1999

	Ts	Rs	As
Charcoal Grey	8	8	84
Charcoal Bronze	8	6	85
Charcoal	8	3	89
Pearl White	16	43	41
Linen White	22	55	23
Ivory White	23	61	16
White	25	60	15
Charcoal Ash	7	7	86
Grey Charcoal Kryptonite	9	16	75
Grey Charcoal Caramel	11	16	73
Grey Charcoal Linen	12	17	71
Pearl Grey Caramel	10	28	62
Grey Caramel	10	24	66
Charcoal Kryptonite	7	9	84
Charcoal Blue	9	15	76
Pearl Linen	14	38	48
Linen	20	51	29
Ivory	23	59	18

Heliogreen fabric - Absolute Screen

Eco-Specified

Composition	100% Polyester
Width	2400mm
Openness	Standard 4%
Color Fastness	6-7 bluescale
Properties	AS 1530.3.1999

	Ts	Rs	As	Tv
Charcoal/Bronze	28.4	25.9	45.7	9.2
Pearl	38.8	37.9	23.3	28.2
Pearl/Linen	42.4	38	19.6	33.8
Linen	43	43	14	49.1
White	49.1	46.1	4.8	49.1
Charcoal	29.2	23.4	47.4	5.8
Pewter	31.4	29.2	39.4	12.3