Latex Rubber Sheeting
Latex is rubber in its purest form. It has a smooth finish on both sides, high tensile strength and elasticity.
Applications: bakery release film, diaphrams, seals and gaskets, flexible valve diaphrams and flexible connections, vacuum blankets for silk screen print down machines, composite moulding, contoured shapes, surgical straps and tournoques
General availability:
| Grades: |
Natural (Grade S), Antistatic (Grade B) and Heat Resistant (Grade HR). |
| Width (mm): |
Up to 920 as standard, maximum 4000 without joins or seams |
| Thickness (mm): |
0.2mm up to 3.0mm. |
| Colours: |
natural, white, black and red |
Cut pieces and profiles available upon request.
Grade 'HR'
Temperature rating: up to +160ºC
Applications: vacuum blankets for composite mouldings, bonding laminated structures, laminating fabrics and veneers to flat and contoured shapes where hot-melt adhesives are used.
Availability
| Thickness |
0.38mm to 1.5mm +/- 10% tolerance (0.015” to 0.06”) |
| Widths Available |
4 metres |
| Colours |
Dark Grey |
Technical Specification
| Tensile Strength |
25MPa |
| Modulus at 500% extension |
3MPa |
| Elongation at Break |
800% |
| Tear Strength (crescent) |
70N/mm |
| Hardness (shore micro) |
50º |
| S.G. |
0.95 |
| Maximum recommended working temperature |
160ºC |
Grade ‘HR’ is a heat resistant sheet formulated to retain strength and elasticity at temperatures up to a maximum of 160ºC. Grade ‘HR’ is especially suitable for use as vacuum blankets for composite mouldings and for bonding laminates where a heat cure or hot melt adhesive is employed.
The physical properties above are typical values abstracted from tests based on ISO37 and ISO34:1
Food Contact Latex Rubber Sheeting
Temperature rating: up to +80ºC
Availability
| Thickness (mm) |
0.2 up to 0.5 +/- 10% tolerance (0.008” to 0.02”) |
| Widths (mm) |
530, 610, 920mm, 1200 |
| Colours |
Natural, White, Blue |
Note that the blue for food contact is NOT equivalent to other Grade S. blues
Typical Properties
| Tensile Strength |
25MPa |
| Modulus at 500% extension |
3MPa |
| Elongation at Break |
850% |
| Tear Strength (crescent) |
70N/mm |
| Hardness (shore micro) |
35º |
| S.G. |
0.95 |
| Maximum recommended working temperature |
80ºC |
The ingredients in these rubbers satisfy the requirements in type and level of German Regulation BGVV and USA FDA CRF 21 Section 177.2600 ‘Rubber Articles for repeated used in contact with foodstuffs’. The Four D Rubber products described above are recommended as suitable for application involving repeated; intermittent; dry; cold contact with foodstuffs. They are NOT recommended for applications involving wet and/or high temperature applications.
The physical properties above are typical values abstracted from tests based on ISO37 and ISO34:1
Product Safety Data:
Composition: natural Rubber plus essential commercial curatives, antioxidants and pigments Storage and Use
| Temperature: |
Store below 26ºC and away from heaters. |
| Humidity: |
Avoid damp storage conditions. |
| Light: |
Protect from prolonged exposure to light in particular bright sunlight and strong u.v. light which will degrade light coloured sheets. |
| Metals: |
Avoid contact with copper and copper containing alloys which will stain light coloured sheets brown. |
| Oils & solvents |
Avoid contact with oils, solvents and greases, which will destroy natural rubber. |
Health Hazards - Grade 'HR'
Natural Rubber Sheeting is considered non-hazardous under normal conditions of temperature. However this grade is designed for use at elevated temperatures up to 160ºC. Two moderately toxic chemicals namely Tetramethyl Thiuram Disulphide and Diphenyl Thiourea are present at less than 3% be weight and both give off irritant vapours when heated to elevated temperatures. At elevated temperatures some degradation may occur and any fumes given off should not be considered non-hazardous. It is recommended that when handling the sheeting, gloves are worn of the PVC fabric coated type. Adequate ventilation should be provided at the point of work in order that fumes do not accumulate in the work area.
Health Hazards - Food Quality
Natural Latex Rubber Sheeting is generally considered non-hazardous. However the product is manufactured from natural latex and latex products may cause an allergic reaction to some people. Persons who know they are susceptible to an allergic reaction from latex products should avoid contact with Natural Latex Rubber Sheeting.
Fire Hazard - both grades
Sheeting should be protected during handling and storage from naked flames as rubber is flammable. In storage areas it is advisable to observe non-smoking restrictions.
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