JPH0584593B2 - - Google Patents

Info

Publication number

JPH0584593B2

JPH0584593B2 JP17717986A JP17717986A JPH0584593B2 JP H0584593 B2 JPH0584593 B2 JP H0584593B2 JP 17717986 A JP17717986 A JP 17717986A JP 17717986 A JP17717986 A JP 17717986A JP H0584593 B2 JPH0584593 B2 JP H0584593B2

Authority

JP

Japan

Prior art keywords

protective film

magnetic tape

cassette

mold

film layer

Prior art date

1986-07-28

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired - Fee Related

Links

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• 230000001681 protective effect Effects 0.000 claims description 46
• 238000001746 injection moulding Methods 0.000 claims description 23
• 239000000463 material Substances 0.000 claims description 20
• 238000004519 manufacturing process Methods 0.000 claims description 17
• 238000002347 injection Methods 0.000 claims description 15
• 239000007924 injection Substances 0.000 claims description 15
• 238000000034 method Methods 0.000 claims description 13
• 239000004033 plastic Substances 0.000 claims description 7
• 229920003023 plastic Polymers 0.000 claims description 7
• 238000004804 winding Methods 0.000 claims description 5
• 230000008878 coupling Effects 0.000 claims 1
• 238000010168 coupling process Methods 0.000 claims 1
• 238000005859 coupling reaction Methods 0.000 claims 1
• 239000010410 layer Substances 0.000 description 51
• 238000001721 transfer moulding Methods 0.000 description 9
• 238000004080 punching Methods 0.000 description 6
• 238000005520 cutting process Methods 0.000 description 4
• 239000012768 molten material Substances 0.000 description 4
• 239000012790 adhesive layer Substances 0.000 description 3
• -1 polyethylene Polymers 0.000 description 3
• 230000000694 effects Effects 0.000 description 2
• 230000037303 wrinkles Effects 0.000 description 2
• 229920002284 Cellulose triacetate Polymers 0.000 description 1
• 239000004698 Polyethylene Substances 0.000 description 1
• 239000004743 Polypropylene Substances 0.000 description 1
• NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
• 239000000853 adhesive Substances 0.000 description 1
• 230000001070 adhesive effect Effects 0.000 description 1
• 238000010030 laminating Methods 0.000 description 1
• 239000002184 metal Substances 0.000 description 1
• 238000000465 moulding Methods 0.000 description 1
• 229920000573 polyethylene Polymers 0.000 description 1
• 229920000139 polyethylene terephthalate Polymers 0.000 description 1
• 239000005020 polyethylene terephthalate Substances 0.000 description 1
• 229920001155 polypropylene Polymers 0.000 description 1
• 238000003825 pressing Methods 0.000 description 1
• 238000005728 strengthening Methods 0.000 description 1