Title: Process for making laminates of sheet-formed, reticulated fibrous structures

Abstract: A composite structure is prepared by extruding a molten thermoplastic resin and foaming agent through a die and simultaneously quenching and taking-up the extrudate under such conditions that the extrudate is fibrillated just as it leaves the die exit without passing through the foamed state. The unopened, sheet-formed and reticulated fibrous structures thus obtained are laminated, pulled apart and pressed. The composite product consists of a fine and uniform fibrillar structure having superior mechanical strength and pliability and are useful for a wide range of applications such as paper substitute, artificial wood veneer and the like. Colored products are also described.

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Inventors: Omori, Akira (Sagamihara, JA)
Okamura, Isao (Sagamihara, JA)
Imoto, Tadasi (Sagamihara, JA)
Katoh, Tadayuki (Tokyo, JA)

Application Number: 485635
Filing Date: 1974-07-03
Publication_date: 1976-09-14
Assignee: Teijin Limited (Osaka, JA)
Primary Class(es): 156/244.18 156/244.19, 156/244.23, 156/244.24, 156/305, 264/51, 264/210.2, 264/288.8, 264/292, 264/321, 264/DIG47
Other Classes:
US Patent Ref:

3539666	Nov, 1970	Schirmer	264/51.
3549470	Dec, 1970	Greenwald et al.	264/DIG.
3562369	Feb, 1971	Chopra et al.	264/DIG.

Other Refs: 1,171,971

Nov, 1969	UK.

Primary Examiner: Weston, Caleb
Assistant Examiner:
Attorney: Sherman & Shalloway