LAMINATED HEAT-INSULATION MATERIALS (OPTIONS) Russian patent published in 2004 - IPC

FIELD: heat-retention materials.

SUBSTANCE: invention relates to manufacture of nonwoven heat-retention materials made from joined together several fibrous clothes and can be employed, for example, in textile and clothing industries as warm-keeping elements in clothing and footwear, sleeping-bags, tents, quits, and the like. Laminated heat-insulation material may optionally be composed of blended polyester fibers, solid and hollow used at weight ratio between 3:7 and 7:3, respectively. Polypropylene film is located between layers and/or outside of nonwoven material and attached thereto by needle-punching techniques. According to another embodiment, material consists of blended polyester fibers with linen fibers at their weight ratio between 3:7 and 7:3, respectively, and is provided with polypropylene film as above. Linen fibers may be possibly those of cottonized flax.

EFFECT: enabled variation of heat conditions in articles.

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