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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0078675 (1987-07-28) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 14 인용 특허 : 10 |
Plastic film and sheet material are provided which have integrally formed surface ribs which are designed to inhibit tears from propagating in one or more selected directions along or across the film or sheet. The ribs may be arranged in laterally spaced parallel rows, or in a criss-cross pattern an
A unitary plastic film comprising upper and lower surfaces and including at least a first array of longitudinally extending solid ribs formed integrally within said film and spaced laterally, one from the other, wherein the thickness of the film between the ribs is no more than about 10 mil and the
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